WO2024058360A1

WO2024058360A1 - Apparatus and method for manufacturing heat exchanger

Info

Publication number: WO2024058360A1
Application number: PCT/KR2023/008162
Authority: WO
Inventors: 조성민; 박유림; 고영덕; 박상준; 박성태; 임정수; 한수현
Original assignee: 삼성전자주식회사
Priority date: 2022-09-14
Filing date: 2023-06-14
Publication date: 2024-03-21
Also published as: KR20240037103A

Abstract

An apparatus for manufacturing a heat exchanger comprising a refrigerant tube comprises: a moving rod which is provided so as to be linearly movable along a first direction; and a tube expanding body which is provided so as to be connected to the moving rod so as to be linearly movable along the first direction, and is provided so as to be insertable into a tube base material of a refrigerant tube so as to enable the tube base material to expand outwardly when the tube expanding body is inserted into the tube base material by being moved by the moving rod. The tube expanding body comprises a plurality of groove forming protrusions which are formed on the outer surface of the tube expanding body so as to extend along a direction inclined from the first direction, and are provided so as to form a plurality of grooves in the inner surface of the tube base material when the tube expanding body is inserted into the tube base material by being moved by the moving rod.

Description

Heat exchanger manufacturing equipment and manufacturing method

The present disclosure relates to a manufacturing apparatus and method of a heat exchanger.

A heat exchanger is a device built into and used in equipment that uses a refrigeration cycle, such as an air conditioner or refrigerator, and includes a plurality of heat exchange fins and a refrigerant tube that guides the refrigerant and is installed to penetrate the plurality of heat exchange fins. The heat exchange fin increases the heat exchange efficiency between the refrigerant flowing through the refrigerant tube and the outside air by increasing the contact area with the air flowing into the heat exchanger from the outside.

In the process of manufacturing a heat exchanger, the tube base material of the refrigerant tube may be arranged to penetrate the installation hole provided in the heat exchange fin, and at this time, a gap may be formed between the tube base material and the installation hole of the heat exchange fin. The heat exchanger can be manufactured as the inner diameter of the tube base material is expanded by an expansion mandrel, and the tube base material and the heat exchange fin are coupled to each other through pressure welding.

One aspect of the present disclosure provides an improved manufacturing apparatus and method for a heat exchanger to manufacture a heat exchanger with improved heat exchange efficiency.

One aspect of the present disclosure provides an improved manufacturing apparatus and method for a heat exchanger to efficiently form grooves on the inner surface of a refrigerant tube.

One aspect of the present disclosure provides an improved manufacturing apparatus and method of a heat exchanger to improve the accuracy of forming grooves on the inner surface of a refrigerant tube.

One aspect of the present disclosure provides an improved manufacturing apparatus and method of a heat exchanger to reduce the manufacturing time and manufacturing cost of the heat exchanger.

The technical problem to be achieved in this document is not limited to the technical problem mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

An apparatus for manufacturing a heat exchanger according to an example of the present disclosure is an apparatus for manufacturing a heat exchanger including a refrigerant tube, including a movable rod provided to be linearly movable along a first direction and connected to the movable rod. An expansion body provided to be linearly movable along a first direction, wherein when the expansion body is moved by the moving rod and inserted into the tube base material of the refrigerant tube, the tube base material expands outward. It may include an expansion body that can be inserted into the tube base material. The expansion body is formed to extend from the outer surface of the expansion body along a direction inclined in the first direction, and when the expansion body is moved by the moving rod and inserted into the tube base material, it is located on the inner surface of the tube base material. It may include a plurality of groove forming protrusions provided to form a plurality of grooves.

The expansion body may be provided to be rotatable about the longitudinal axis of the movable rod.

The expansion body may be arranged to rotate in a first rotation direction when inserted into the tube base material. Each of the plurality of groove forming protrusions may include a first end in a direction in which it is inserted into the tube base material and a second end opposite to the first end. Each of the plurality of groove forming protrusions may extend from the second end to the first end at an angle in the first rotation direction with respect to the first direction.

The movable rod extends along the first direction, and at least a portion may be disposed inside the expanded tube body. The expansion body may be provided to rotate around the movable rod.

It may further include a bearing provided between the expansion body and the moving rod.

The bearing may include a plurality of rolling elements disposed between the inner peripheral surface of the expanded tube body and the outer peripheral surface of the moving rod. The plurality of rolling elements may be arranged along the circumferential direction of the expanded tube body.

The bearing may include a plurality of bearings. The plurality of bearings may be arranged along the longitudinal direction of the expanded body.

The expanded tube body may include a tapered portion that narrows in the direction in which it is inserted into the tube base material. The plurality of groove forming protrusions may be disposed on the outer surface of the tapered portion.

The expansion body may further include a cylinder portion extending along the first direction and having a hollow cylindrical shape. The tapered portion may extend from a first end in a direction in which the cylinder portion is inserted into the tube base material. At least a portion of the plurality of groove forming protrusions may be disposed on the outer surface of the cylinder unit.

The expanded tube body has a first end in the direction of insertion into the tube base material, a second end opposite to the first end, a first hole formed in the first end, and a second hole formed in the second end. may include. The movable rod may extend through the first hole and the second hole.

The movable rod may further include a head portion in contact with an outside of the first end of the expanded tube body. The head portion may be formed such that a width in a direction perpendicular to the first direction is wider than a width of the first hole in a direction perpendicular to the first direction.

The head part may include a first part adjacent to the expanded tube body and a second part located at one end of the first part in the direction in which it is inserted into the tube base material. The first part may be formed such that its width in a direction perpendicular to the first direction increases as it moves from the expansion body to the second part.

The movable rod may further include a pressing portion in contact with an outside of the second end of the expansion body. The pressing unit may be provided to press the second end in the first direction when the movable rod moves in the first direction. The pressing portion may be formed so that a width in a direction perpendicular to the first direction is wider than a width of the second hole in a direction perpendicular to the first direction.

The plurality of groove forming protrusions may be arranged at even intervals along the outer circumferential direction of the expanded tube body.

The expansion body may further include a rotating part rotatable about the movable rod and a fixing ball fixed to the movable rod. The fixing ball may be located at one end of the rotating part in the direction in which it is inserted into the tube base material. The plurality of groove forming protrusions may be provided on the outer surface of the rotating part.

An apparatus for manufacturing a heat exchanger according to an example of the present disclosure is an apparatus for manufacturing a heat exchanger including a refrigerant tube, including a movable rod provided to be linearly movable in one direction and connected to the movable rod in the one direction. It is provided to be linearly movable, and may include an expansion body provided to be insertable into the tube base material of the refrigerant tube so that the tube base material is expanded. The expansion tube body is formed on an outer surface of the expansion body, and includes a plurality of groove forming protrusions provided to form a plurality of grooves on the inner surface of the tube base material when inserted into the tube base material. can do. The plurality of groove forming protrusions may be provided to press against the inner surface of the tube base material when inserted into the tube base material. The expansion body may be provided to rotate around the moving rod as the plurality of groove forming protrusions are pressed against the inner surface of the tube base material.

The plurality of groove forming protrusions may be arranged side by side in the outer circumferential direction of the expanded tube body. Each of the plurality of groove forming protrusions may extend in a spiral direction along the one direction.

It may further include a bearing disposed between the inner peripheral surface of the expansion body and the outer peripheral surface of the moving rod.

The expanded tube body includes a cylinder portion extending in the one direction and formed to have a cylindrical shape, and a tapered shape extending in the one direction from the cylinder portion and having a narrowing width toward the direction of insertion into the tube base material. It can include more wealth. At least a portion of the plurality of groove forming protrusions may be disposed on an outer surface of the tapered portion. At least another portion of the plurality of groove forming protrusions may be disposed on the outer surface of the cylinder unit.

A method of manufacturing a heat exchanger according to an example of the present disclosure includes coupling a tube base material to a plurality of heat exchange fins, wherein the plurality of heat exchange fins are arranged to penetrate the tube base material; , linearly moving an expansion mandrel toward the tube base material, and when the linearly moving expansion mandrel is inserted into the tube base material to expand the tube base material, a plurality of groove forming protrusions are formed on the outer surface of the expansion mandrel. It may include forming a plurality of grooves on the inner surface of the tube base material while rotating.

A heat exchanger manufacturing apparatus according to an example of the present disclosure is a heat exchanger manufacturing apparatus for coupling a tube base material to a heat exchange fin, the tube base material, and the heat exchange fin penetrated by the tube base material. It may include a supporter supporting a supporter, an actuator, and an expansion mandrel that is connected to the actuator to be movable with respect to the supporter and expands the tube base material. The expansion mandrel is provided to be insertable into the tube base material according to the linear movement of the moving rod and the moving rod and the moving rod provided to be able to move linearly in one direction, and the expanding pipe is provided to be rotatable about the moving rod. Can include a body. The expansion tube body is formed to extend from the outer surface of the expansion body along a direction inclined in the one direction, and is provided to form a plurality of grooves on the inner surface of the tube base material when inserted into the tube base material. It may include a groove forming protrusion.

According to the spirit of the present disclosure, the heat exchanger manufacturing apparatus includes a plurality of groove forming protrusions provided to form a plurality of grooves on the inner surface of the tube base material, and can manufacture a heat exchanger with improved heat exchange efficiency.

According to the idea of the present disclosure, grooves can be formed in the tube base material of the heat exchanger when expanded, so that grooves can be efficiently formed on the inner surface of the refrigerant tube.

According to the idea of the present disclosure, the expansion tube body rotates when inserted into the tube base material, expanding the tube base material and forming a groove at the same time, so the accuracy of forming a groove on the inner surface of the refrigerant tube can be improved.

According to the spirit of the present disclosure, grooves can be formed in the tube base material of the heat exchanger when expanded, thereby reducing the manufacturing time and manufacturing cost of the heat exchanger.

1 is a diagram illustrating an example of an air conditioner to which a heat exchanger according to an embodiment of the present disclosure is applied.

Figure 2 is a perspective view showing a heat exchanger according to an embodiment of the present disclosure.

Figure 3 is a diagram schematically showing an apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 4 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure.

Figure 5 is a longitudinal cross-sectional view of the expansion mandrel of Figure 4.

Figure 6 is an enlarged view of A in Figure 4.

Figure 7 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 8 is a diagram for explaining the arrangement of the bearings of the expansion mandrel of the heat exchanger manufacturing apparatus according to an embodiment of the present disclosure.

Figure 9 is an enlarged view of B in Figure 5.

Figure 10 is an enlarged view of C in Figure 5.

Figure 11 is a diagram showing an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 12 is a diagram showing the appearance of the refrigerant tube after the pipe expansion process in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 13 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 14 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 15 is a diagram showing an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 16 is a diagram illustrating an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 17 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure.

Figure 18 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure.

Figure 19 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure.

Figure 20 is a longitudinal cross-sectional view of the expansion mandrel of Figure 19.

Figure 21 is a diagram showing an example of the process of expanding the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 22 is a diagram illustrating an example of a process of arranging a plurality of heat exchange fins to penetrate a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 23 is an enlarged cross-sectional view for explaining the appearance of the tube base material and a plurality of heat exchange fins before expansion in explaining the manufacturing method of the heat exchanger according to an embodiment of the present disclosure.

Figure 24 is a diagram showing an example of a process of linearly moving the expansion mandrel toward the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 25 is a diagram showing an example of the process of expanding the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Figure 26 is a diagram showing an example of a process of connecting a plurality of refrigerant tubes after expansion in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

The embodiments described in this specification and the configurations shown in the drawings are only preferred examples of the disclosed invention, and at the time of filing this application, there may be various modifications that can replace the embodiments and drawings in this specification.

In addition, the same reference numbers or symbols shown in each drawing of this specification indicate parts or components that perform substantially the same function.

Additionally, the terms used herein are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. The existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In addition, terms including ordinal numbers such as “first”, “second”, etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Meanwhile, the terms “up and down direction,” “bottom side,” and “front and back direction” used in the following description are defined based on the drawings, and the shape and location of each component are not limited by these terms.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

Referring to FIG. 1,

heat exchangers

12 and 21 according to an embodiment of the present disclosure may be applied to the air conditioner 1.

The air conditioner 1 can absorb heat inside the air conditioning space and emit heat outside the air conditioning space in order to cool the air conditioning space that is subject to air conditioning. Additionally, the air conditioner 1 may absorb heat from outside the air conditioning space and emit heat within the air conditioning space in order to heat the air conditioning space. To this end, the air conditioner 1 may generally include an indoor unit 20 installed within the air conditioning space and an outdoor unit 10 installed outside the air conditioning space.

The outdoor unit 10 can exchange heat with outdoor air outside the air conditioning space. The outdoor unit 10 may perform heat exchange between the refrigerant and outdoor air using a phase change (eg, evaporation or condensation) of the refrigerant. For example, the outdoor unit 10 may release heat from the refrigerant to the outdoor air using condensation of the refrigerant. Additionally, the outdoor unit 10 can absorb heat from outdoor air into the refrigerant by using evaporation of the refrigerant.

Although one outdoor unit 10 is shown in FIG. 1, the number of outdoor units 10 is not limited to that shown in FIG. 1. For example, the air conditioner 1 may include a plurality of outdoor units.

The indoor unit 20 can exchange heat with indoor air within the air conditioning space. The indoor unit 20 may perform heat exchange between the refrigerant and indoor air using a phase change (eg, evaporation or condensation) of the refrigerant. For example, the indoor unit 20 can cool the air conditioning space by absorbing heat from indoor air into the refrigerant using evaporation of the refrigerant. Additionally, the indoor unit 20 can heat the air conditioning space by discharging heat from the refrigerant to the indoor air using condensation of the refrigerant.

Although one indoor unit 20 is shown in FIG. 1, the number of indoor units 20 is not limited to that shown in FIG. 1. For example, the air conditioner 1 may include a plurality of indoor units. A plurality of different indoor units may be respectively installed in a plurality of different air conditioning spaces.

In this way, the air conditioner 1 can perform heat exchange between the refrigerant outside the air conditioning space and outdoor air and heat exchange between the refrigerant and indoor air within the air conditioning space.

At this time, the air conditioner 1 may flow the refrigerant between the outside of the air conditioning space and the inside of the air conditioning space in order to move heat between the outside of the air conditioning space and the inside of the air conditioning space. In other words, the air conditioner 1 may include a refrigerant circulation circuit for moving heat between outside the air conditioning space and within the air conditioning space.

For example, the air conditioner 1 may include a refrigerant circulation circuit as shown in FIG. 1 .

The refrigerant circulation circuit may include a compressor 11, an outdoor heat exchanger 12, an expansion valve 13, and an indoor heat exchanger 21. The refrigerant circulates in the following order: compressor (11), outdoor heat exchanger (12), expansion valve (13), and indoor heat exchanger (21), or compressor (11), indoor heat exchanger (21), expansion valve (13), and It can be circulated in the order of the outdoor heat exchanger (12).

Additionally, the refrigerant circulation circuit may further include a flow path switching valve 14 and an accumulator 15. The flow path switching valve 14 may be connected to the refrigerant discharge port of the compressor 11, and the accumulator 15 may be connected to the refrigerant inlet of the compressor 11.

The compressor 11, the outdoor heat exchanger 12, the expansion valve 13, the flow path switching valve 14, and the accumulator 15 may be disposed in the outdoor unit 10. The indoor heat exchanger 21 may be disposed in the indoor unit 20. When the air conditioner 1 includes a plurality of indoor units, an indoor heat exchanger 21 may be installed in each of the plurality of indoor units. The location of the expansion valve 13 is not limited to the outdoor unit 10, and may be placed in the indoor unit 20 if necessary.

The compressor 11 can compress refrigerant gas and discharge high-temperature, high-pressure refrigerant gas. For example, the compressor 11 may include a motor and a compression mechanism, and the compression mechanism may compress the refrigerant gas by the torque of the motor.

A flow path switching valve 14 may be connected to the outlet of the compressor 11.

The flow path switching valve 14 may include, for example, a 4-way valve.

The flow path switching valve 14 can switch the circulation path of the refrigerant depending on the operation mode (for example, cooling operation or heating operation) of the air conditioner 1. For example, during the cooling operation of the air conditioner (1), the flow path switching valve (14) guides the refrigerant gas discharged from the compressor (11) to the outdoor heat exchanger (12), whereby the refrigerant is transferred to the compressor (11), It can be circulated in the order of the outdoor heat exchanger (12), the expansion valve (13), and the indoor heat exchanger (21). In addition, during the heating operation of the air conditioner (1), the flow path switching valve (14) guides the refrigerant gas discharged from the compressor (11) to the indoor heat exchanger (21), whereby the refrigerant is transferred to the compressor (11) and the indoor heat exchanger. It can be circulated in the following order: gas 21, expansion valve 13, and outdoor heat exchanger 12.

In the outdoor heat exchanger 12, heat exchange can occur between the refrigerant and outdoor air.

For example, during cooling operation, high-pressure, high-temperature refrigerant gas is condensed in the outdoor heat exchanger 12, and while the refrigerant is condensing, the refrigerant may release heat to the outdoor air. During cooling operation, the outdoor heat exchanger 12 may discharge refrigerant liquid.

Additionally, in the outdoor heat exchanger 12 during the heating operation, the low-temperature voltage refrigerant liquid is evaporated, and while the refrigerant is evaporated, the refrigerant can absorb heat from the outdoor air. During heating operation, the outdoor heat exchanger 12 may discharge refrigerant gas.

An outdoor fan 16 may be provided near the outdoor heat exchanger 12. The outdoor fan 16 may blow outdoor air to the outdoor heat exchanger 12 to promote heat exchange between the refrigerant and the outdoor air.

The expansion valve 13 can expand high-temperature, high-pressure refrigerant liquid using a throttling effect. Additionally, the expansion valve 13 can discharge low temperature and low pressure refrigerant liquid.

The expansion valve 13 may be connected to the indoor unit 20. The number of expansion valves 13 may correspond to the number of indoor units 20.

In the indoor heat exchanger 21, heat exchange can occur between the refrigerant and indoor air.

For example, during cooling operation, low-pressure, low-temperature refrigerant liquid is evaporated in the indoor heat exchanger 21, and while the refrigerant is evaporating, the refrigerant may absorb heat from indoor air. The air conditioning space can thereby be cooled. During cooling operation, the indoor heat exchanger 21 may discharge refrigerant gas.

Additionally, during the heating operation, the indoor heat exchanger 21 condenses high-temperature, high-pressure refrigerant gas, and while the refrigerant is condensing, the refrigerant may release heat to the indoor air. Thereby, the air conditioning space can be heated. During heating operation, the indoor heat exchanger 21 may discharge refrigerant liquid.

Depending on the embodiment, a separate expansion valve (not shown) or a capillary tube (not shown) may be provided on the inlet side of the indoor heat exchanger 21. A separate expansion valve or capillary can expand the refrigerant liquid and provide low-temperature, low-pressure refrigerant liquid to the indoor heat exchanger 21.

An indoor fan 22 may be provided near the indoor heat exchanger 21. The indoor fan 22 may blow indoor air to the indoor heat exchanger 21 to promote heat exchange between the refrigerant and outdoor air.

An accumulator 15 may be provided on the inlet side of the compressor 11.

Low-temperature, low-pressure refrigerant evaporated from an indoor heat exchanger or an outdoor heat exchanger may flow into the accumulator 15. For example, during cooling operation, low-temperature, low-pressure refrigerant evaporated from the indoor heat exchanger 21 may flow into the accumulator 15, and during heating operation, low-temperature, low-pressure refrigerant evaporated from the indoor heat exchanger 21 may flow into the accumulator 15. refrigerant may flow in.

The accumulator 15 can separate the refrigerant liquid from the introduced refrigerant and provide the refrigerant in its original state to the compressor. Depending on the load, the refrigerant may be incompletely evaporated in the indoor heat exchanger 21 or the outdoor heat exchanger 12, and a mixture of refrigerant liquid and solid refrigerant may flow into the accumulator 15. For example, during cooling operation, the refrigerant may be incompletely evaporated in the indoor heat exchanger 12 depending on the temperature of the air conditioning space.

As described above, the air conditioner 1 according to an embodiment of the present disclosure may include

heat exchangers

12 and 21 configured to exchange heat with external air.

However, the heat exchanger manufactured by the heat exchanger manufacturing apparatus and manufacturing method according to the spirit of the present disclosure is not limited to being applied to the above-described air conditioner, and can be applied to various types of devices using a refrigeration cycle.

Hereinafter, the indoor heat exchanger 21 and the outdoor heat exchanger 12 are collectively referred to as the heat exchanger 100.

In FIG. 2 , for convenience, the heat exchanger 100 according to an embodiment of the present disclosure is shown excluding the connection tube 140 (see FIG. 26 ), which will be described later.

Referring to FIG. 2, the heat exchanger 100 according to an embodiment of the present disclosure may include a refrigerant tube 110. The refrigerant tube 110 can guide the refrigerant for heat exchange. A passage through which the refrigerant flows may be provided inside the refrigerant tube 110.

The refrigerant tube 110 may be provided in the shape of a tube with a hollow interior so that the refrigerant, which is a fluid, can flow.

The refrigerant flowing inside the refrigerant tube 110 may be composed of various types of refrigerants such as HC single refrigerant, mixed refrigerant including HC, R32, R410A, R407C, and carbon dioxide.

The refrigerant tube 110 may be required to be formed as long as possible in order to expand the heat exchange area between the refrigerant flowing along the refrigerant tube 110 and the external air. However, due to space constraints, it may not be easy to form the refrigerant tube 110 long in only one direction.

To solve this problem, the refrigerant tube 110 may include a linear portion 111 extending in one direction and a bending portion 112 bent and extending from an end of the linear portion 111.

The linear portion 111 may be formed to have a linear shape extending in one direction. One end of the linear part 111 may be connected to the bending part 112, and the other end of the linear part 111, opposite to the bending part 112, may be connected to the connecting ends 141 and 142 of the connecting tube 140, see FIG. 26. ) can be connected to.

The bending portion 112 may be bent and extended from one end of the linear portion 111. The bending portion 112 may connect adjacent linear portions 111 to each other. One end of the bending portion 112 may be connected to one end of a pair of linear portions 111 adjacent to each other, and the other end of the bending portion 112 may be connected to the other end of a pair of linear portions 111 adjacent to each other. can be connected to At this time, a pair of linear portions 111 adjacent to each other may extend in parallel directions. The bending portion 112 may be formed to have an approximately 'U' shape.

That is, the refrigerant tube 110 may be configured to include a hairpin-shaped refrigerant tube.

In this way, the refrigerant tube 110 can be formed to have a bent and extended hairpin shape, and the heat exchange area of the refrigerant tube 110 can be increased in a limited space.

The refrigerant tube 110 may be made of a material with high thermal conductivity. For example, the refrigerant tube 110 may be made of a metal material with high thermal conductivity, such as aluminum or copper.

The heat exchanger 100 may include heat exchange fins 120 coupled to the outer peripheral surface of the refrigerant tube 110. The heat exchange fins 120 may be penetrated by the refrigerant tube 110. The refrigerant tube 110 may be arranged to penetrate the heat exchange fins 120.

The heat exchange fins 120 may be formed to have a substantially flat plate shape. The direction in which the plate shape of the heat exchange fin 120 extends may be approximately perpendicular to the direction in which the linear portion 111 of the refrigerant tube 110 extends.

A plurality of heat exchange fins 120 may be provided. The plurality of heat exchange fins 120 may be arranged in the direction in which the refrigerant tube 110 extends. In other words, the plurality of heat exchange fins 120 may be stacked in the direction in which the linear portion 111 extends.

The heat exchange fin 120 is coupled to the refrigerant tube 110 to expand the heat exchange area and improve heat exchange efficiency between the refrigerant flowing along the refrigerant tube 110 and external air.

That is, the heat exchanger 100 according to an embodiment of the present disclosure may be configured as a fin-tube type heat exchanger including a refrigerant tube 110 and heat exchange fins 120.

The heat exchanger 100 may include end plates 130 installed on both sides of the heat exchange fins 120 to protect the stacked heat exchange fins 120.

The end plate 130 may be formed to have a substantially flat plate shape. The end plate 130 may be arranged in parallel with the plurality of heat exchange fins 120. The end plate 130 may extend in a direction parallel to the direction in which the plurality of heat exchange fins 120 extend.

In detail, a pair of heat exchange fins 120 located at both ends of the plurality of heat exchange fins 120 in the stacking direction among the plurality of heat exchange fins 120 will be covered by a pair of end plates 130. You can. A pair of end plates 130 may cover the heat exchange fins 120 in the stacking direction. The heat exchange fins 120 may be located inside the pair of end plates 130 in the stacking direction.

The end plate 130 may be penetrated by the refrigerant tube 110. The refrigerant tube 110 may be arranged to penetrate the end plate 130.

In detail, the linear portion 111 may be arranged to penetrate the pair of end plates 130 in the stacking direction.

At least a portion of the linear portion 111 may be located inside the pair of end plates 130 in the stacking direction. Another part of the linear portion 111 may be located outside the pair of end plates 130 in the stacking direction. For example, an end of the linear portion 111 on a side opposite to the bending portion 112 may be exposed to the outside of the end plate 130 .

The bending portion 112 may be exposed to the outside of the end plate 130.

The heat exchange fin 120 may include a fin plate 121, an installation hole 122, and a fin collar 123 (see FIG. 23, etc.).

The pin plate 121 may be formed to have a substantially flat plate shape.

The direction in which the plate shape of the fin plate 121 extends may be approximately perpendicular to the direction in which the linear portion 111 of the refrigerant tube 110 extends.

The fin plate 121 is configured to increase the heat transfer area, thereby improving heat exchange efficiency between the refrigerant flowing along the refrigerant tube 110 and external air.

The fin plates 121 of the plurality of heat exchange fins 120 may be arranged parallel to each other. The fin plates 121 of the heat exchange fins 120 adjacent to each other may be arranged to be spaced apart.

In detail, pin plates 121 adjacent to each other may be spaced apart by a pin collar 123. The pin collar 123 may be provided to maintain the distance between the plurality of pin plates 121.

The heat exchange fin 120 is configured to allow air to pass through the space between the fin plates 121 spaced apart from each other and exchange heat with the heat exchange fin 120, so that heat can be generated between the refrigerant flowing along the refrigerant tube 110 and the external air. It can be arranged to improve exchange efficiency.

The installation hole 122 may be formed on the pin plate 121. The installation hole 122 may be provided so that the refrigerant tube 110 can penetrate it.

The pin collar 123 may be bent and extended from the edge of the installation hole 122. The pin collar 123 may be formed to contact the outer peripheral surface of the refrigerant tube 110. In detail, the pin collar 123 may be formed to contact the outer peripheral surface of the linear portion 111.

The fin collar 123 may be formed along the circumferential direction of the refrigerant tube 110. The fin collar 123 may extend in a direction parallel to the direction in which the linear portion 111 of the refrigerant tube 110 extends.

The refrigerant tube 110 and the fin plate 121 can exchange heat through the fin collar 123.

The refrigerant tube 110 of the heat exchanger 100 according to an embodiment of the present disclosure may be constructed by processing a tube base material 110a (see FIG. 3).

The tube base material 110a may be provided in a tube shape with a hollow interior.

The tube base material 110a may include a base material linear portion 111a extending in one direction, and a base material bending portion 112a extending by bending at an end of the base material linear portion 111a (see FIG. 22, etc.).

After the tube base material 110a is processed into the refrigerant tube 110, the base material linear portion 111a may form the linear portion 111 of the refrigerant tube 110. After the tube base material 110a is processed into the refrigerant tube 110, the base material bending portion 112a may form the bending portion 112 of the refrigerant tube 110.

The tube base material 110a may be manufactured by bending a tube extending in one direction. The portion bent during the manufacturing process of the tube base material 110a may form the base material bending portion 112a after manufacturing.

The hollow formed inside the tube base material 110a may be formed by forming a hollow inside a cylindrical raw material extending in one direction through an extrusion or drawing process, but the hollow inside the tube base material 110a The way this is formed is not limited to this.

The tube base material 110a may be made of a ductile material. For example, the tube base material 110a may be made of a ductile material such as aluminum or copper.

The tube base material 110a may be made of a material with high thermal conductivity. For example, the tube base material 110a may be made of a metal material with high thermal conductivity, such as aluminum or copper.

As shown in FIG. 22, in order to easily perform the process of stacking a plurality of heat exchange fins 120 to penetrate the tube base material 110a, the diameter of the tube base material 110a is the diameter of the refrigerant tube 110 after processing. It can be formed to be smaller. That is, the tube base material 110a before processing may not be in contact with the fin collar 123 while penetrating the installation hole 122 of the heat exchange fin 120. In this case, the tube base material 110a and the heat exchange fin 120 may not be coupled to each other, and heat exchange between the tube base material 110a and the heat exchange fin 120 may not occur efficiently.

Accordingly, after arranging the plurality of heat exchange fins 120 to penetrate the tube base material 110a, a process of expanding the diameter of the tube base material 110a may be required. As the diameter of the tube base material 110a expands, the outer peripheral surface of the tube base material 110a may be in contact with the fin collar 123, and the tube base material 110a may be coupled to the heat exchange fin 120.

In other words, as the diameter of the tube base material 110a is expanded and processed into the refrigerant tube 110, the outer peripheral surface of the refrigerant tube 110 can be in contact with the heat exchange fin 120, and the refrigerant tube 110 and the heat exchange fin ( 120) can be combined.

In this way, the process of expanding the diameter of the tube base material 110a is called a tube expansion process, and the tube base material 110a can be coupled to the heat exchange fin 120 through the tube expansion process.

The configuration of the heat exchanger 100 described above with reference to FIG. 2 is only an example of a heat exchanger manufactured by the heat exchanger manufacturing apparatus and manufacturing method according to the spirit of the present disclosure. The heat exchanger manufactured by the heat exchanger manufacturing apparatus and manufacturing method according to the spirit of the present disclosure is not limited to the embodiment of FIG. 2 and may be configured in various ways. Furthermore, the heat exchanger manufactured by the heat exchanger manufacturing apparatus and manufacturing method according to the spirit of the present disclosure is not a finned tube type heat exchanger, but is used in the manufacturing apparatus and manufacturing method of various types of heat exchangers that require a refrigerant tube expansion process. It can be applied.

Hereinafter, with reference to FIGS. 3 to 26, the manufacturing apparatus and manufacturing method for manufacturing the heat exchanger 100 of FIG. 2 will be described as an example.

Referring to FIG. 3, the heat exchanger manufacturing apparatus 3 may be configured to couple the tube base material 110a to a plurality of heat exchange fins 120.

The heat exchanger manufacturing apparatus 3 may include a tube base material 110a and a supporter 31 supporting the heat exchange fin 120 penetrated by the tube base material 110a.

The supporter 31 includes a receiving space for accommodating the tube base material 110a and the heat exchange fin 120 penetrated by the tube base material 110a. The supporter 31 may support the tube base material 110a and the heat exchange fin 120 accommodated in the receiving space to maintain a constant position.

As an example, the supporter 31 may be provided with a clamp (not shown) for fixing the tube base material 110a and the heat exchange fin 120 supported by the supporter 31.

As an example, the supporter 31 may be provided to support at least one surface of the tube base material 110a and the heat exchange fin 120.

The heat exchanger manufacturing apparatus 3 may include an actuator 32. The actuator 32 may be configured to transmit power to an expansion mandrel 300, which will be described later. The expansion mandrel 300 may be provided to be movable by power received from the actuator 32. The expansion mandrel 300 is connected to the actuator 32 and may be movable relative to the supporter 31.

As an example, the actuator 32 may transmit power to the expansion mandrel 300 using hydraulic pressure. In this case, the heat exchanger manufacturing device 3 may include a hydraulic pump (not shown) that generates power by hydraulic pressure. As an example, the actuator 32 may be connected to a hydraulic pump to receive power by hydraulic pressure. Alternatively, as an example, a hydraulic pump may be a component of the actuator 32.

The heat exchanger manufacturing apparatus 3 may include a mandrel holder 33 that supports the expansion mandrel 300, which will be described later. The mandrel holder 33 can movably support the expansion mandrel 300. The expansion mandrel 300 may be provided to be movable with respect to the mandrel holder 33.

The mandrel holder 33 may have a hollow interior. At least a portion of the moving rod 320 (see FIG. 4) of the expansion mandrel 300 may be inserted into the hollow of the mandrel holder 33. The moving rod 320 may be provided to be movable in one direction along the hollow of the mandrel holder 33. The hollow of the mandrel holder 33 may be formed parallel to the direction in which the expansion mandrel 300 or the moving rod 320 moves. Here, components described as movable or linearly movable in one direction may mean movable back and forth along one direction. For example, the movable rod 320 can move back and forth along the longitudinal axis of the movable rod 320 .

The mandrel holder 33 may be connected to the actuator 32. The mandrel holder 33 may be provided to transmit power transmitted from the actuator 32 to the expansion mandrel 300. The power transmitted from the actuator 32 may be transmitted to the expansion mandrel 300 through the hollow inside the mandrel holder 33 described above.

The mandrel holder 33 may be supported by an actuator 32.

The mandrel holder 33 may be comprised of a hydraulic cylinder.

The mandrel holder 33 may be provided in a number corresponding to the number of expansion mandrels 300, but is not limited thereto. As an example, a plurality of expansion mandrels 300 may be supported on a single mandrel holder 33.

Contrary to the premise described above, the mandrel holder 33 may be a component of the actuator 32.

The expansion mandrel 300 may be provided to couple the tube base material 110a to the heat exchange fin 120. The expansion mandrel 300 may be provided to expand the tube base material 110a. The expansion mandrel 300 may be provided to be inserted into the tube base material 110a.

The expansion mandrel 300 may be provided to be movable in one direction with respect to the supporter 31. The expansion mandrel 300 moves in one direction and can be inserted into the tube base material 110a supported by the supporter 31. The expansion mandrel 300 moves in one direction and may be separated from the tube base material 110a. That is, the expansion mandrel 300 can be moved in the direction in which it is inserted into the tube base material 110a when the tube base material 110a is expanded, and after the expansion of the tube base material 110a is completed, the expansion mandrel 300 is inserted into the tube. It may be moved in a direction opposite to the direction in which it is inserted into the base material 110a.

As shown in FIG. 3, one direction in which the expansion mandrel 300 moves may be expressed as a vertical Z direction parallel to the X-Y plane.

At this time, the linear portion 111a of the tube base material 110a may extend in the Z direction. At this time, the heat exchange fins 120 penetrating the tube base material 110a may be arranged in a direction parallel to the X-Y plane.

In FIG. 3, the Z direction in which the expansion mandrel 300 linearly moves is shown as if it were an up-down direction with respect to the ground, but the spirit of the present disclosure is not limited thereto. The Z direction in which the expansion mandrel 300 moves linearly may be a direction horizontal to the ground.

The tube base material 110a may include an insertion end 113a (see FIG. 24, etc.) into which the expansion mandrel 300 is inserted. The insertion end 113a may be formed at the end of the base material linear portion 111a of the tube base material 110a. The insertion end 113a may be formed at an end of the base material linear portion 111a on a side opposite to the base material bending portion 112a. The expansion mandrel 300 may be inserted into the tube base material 110a through the insertion end 113a of the tube base material 110a.

Therefore, for the expansion process, the tube base material 110a may be arranged so that the insertion end 113a faces the expansion mandrel 300. Before the expansion mandrel 300 is inserted into the tube base material 110a, the insertion end 113a may be arranged to face the expansion mandrel 300. The supporter 31 may support the tube base material 110a and the heat exchange fin 120 so that the insertion end 113a of the tube base material 110a maintains a position facing the expansion mandrel 300.

Before the expansion mandrel 300 is inserted into the tube base material 110a, the insertion end 113a of the tube base material 110a may face the expansion mandrel 300 in the Z direction.

The heat exchanger manufacturing apparatus 3 may include a connection frame 34 connecting the supporter 31 and the actuator 32.

The connection frame 34 may extend in the Z direction in which the expansion mandrel 300 can move.

In FIG. 3, the supporter 31 and the actuator 32 are shown as being connected by a connection frame 34 formed in the shape of a wall, but the present invention is not limited thereto. The connection frame 34 includes a plurality of bar-shaped frame structures and can connect the supporter 31 and the actuator 32.

The configuration of the heat exchanger manufacturing apparatus 3 described above with reference to FIG. 3 is only an example of the heat exchanger manufacturing apparatus according to the spirit of the present disclosure, and the spirit of the present disclosure is not limited thereto. The apparatus for manufacturing a heat exchanger according to the spirit of the present disclosure includes an expansion mandrel and may include various configurations provided to perform an expansion process of the tube base material by transmitting power to the expansion mandrel.

Figure 4 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure. Figure 5 is a longitudinal cross-sectional view of the expansion mandrel of Figure 4. Figure 6 is an enlarged view of A in Figure 4. Figure 7 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 8 is a diagram for explaining the arrangement of the bearings of the expansion mandrel of the heat exchanger manufacturing apparatus according to an embodiment of the present disclosure. Figure 9 is an enlarged view of B in Figure 5. Figure 10 is an enlarged view of C in Figure 5. Figure 11 is a diagram showing an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 12 is a diagram showing the appearance of the refrigerant tube after the pipe expansion process in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

Referring to FIGS. 4 to 12 , the expansion mandrel 300 may be provided to be able to move linearly back and forth in one direction. The expansion mandrel 300 may be provided to be linearly movable in the Z direction.

When expanding the tube base material 110a, the expansion mandrel 300 may be moved in the L1 direction to be inserted into the tube base material 110a. The L1 direction may be parallel to the Z direction. After the expansion process of the tube base material 110a is completed, the expansion mandrel 300 may be moved in a direction opposite to the L1 direction and parallel to the Z direction to be separated from the tube base material 110a.

The expansion mandrel 300 may include a movable rod 320 capable of linear movement in one direction. The moving rod 320 may be provided to be linearly movable in the Z direction.

When the expansion mandrel 300 expands the tube base material 110a, the moving rod 320 may be moved in the L1 direction so that the expansion tube body 310, which will be described later, is inserted into the tube base material 110a. After the expansion process of the tube base material 110a is completed, the moving rod 320 is moved in a direction opposite to the L1 direction and parallel to the Z direction so that the expansion body 310, which will be described later, is separated from the tube base material 110a. You can.

As an example, the moving rod 320 may be connected to the actuator 32 to receive power. As an example, the movable rod 320 may be movably supported by the mandrel holder 33.

The movable rod 320 may extend along one direction (Z) in which the movable rod 320 can move.

The detailed configuration of the moving rod 320 will be described later.

The expansion mandrel 300 may include an expansion body 310 . The expansion tube body 310 may be provided to be insertable into the tube base material 110a so that the tube base material 110a is expanded.

The expanded tube body 310 may be formed such that the width of at least a portion of the expanded tube body 310 is larger than the diameter of the tube base material 110a. In other words, at least a portion of the expanded tube body 310 may be formed so that the width in the direction parallel to the X-Y plane is wider than the width of the base material linear portion 111a of the tube base material 110a. When the expansion body 310 is inserted into the tube base material 110a, the expansion body 310 presses the inner surface of the tube base material 110a due to the difference between the width of the expansion tube body 310 and the width of the tube base material 110a. This can be done, and the diameter of the tube base material (110a) can be increased.

The expansion body 310 may be made of a material harder than the material constituting the tube base material 110a. For example, the expansion body 310 may be made of various materials, such as metal materials that are harder than materials such as aluminum and copper that make up the tube base material 110a.

The expansion body 310 may be formed to have a shape corresponding to the shape of the tube base material 110a. As an example, the expansion body 310 may be formed to have a shape in which the distance from the central axis to the outer surface is approximately uniform to correspond to the shape of the hollow inside the tube base material 110a. Accordingly, the expansion body 310 can uniformly transmit external force to the tube base material 110a, and the tube base material 110a can be uniformly expanded. However, the present invention is not limited to this, and the expansion body 310 may be formed to have various shapes depending on the shape of the tube base material 110a or the desired shape of the refrigerant tube 110.

The expansion body 310 may be connected to the movable rod 320. The expansion body 310 may be provided to be linearly movable in one direction (Z) together with the movable rod 320.

When expanding the tube base material 110a, the expander body 310 may be moved in the L1 direction to be inserted into the tube base material 110a. After the expansion process of the tube base material 110a is completed, the moving rod 320 is moved in a direction opposite to the L1 direction and parallel to the Z direction so that the expansion body 310, which will be described later, is separated from the tube base material 110a. You can.

That is, the expansion body 310 moves in the L1 direction together with the moving rod 320 and can be inserted into the tube base material 110a, and as it is inserted into the tube base material 110a, the tube base material 110a can be expanded. .

Depending on the length of the expanded tube body 310 or the length of the tube base material 110a, when the expanded tube body 310 is inserted into the tube base material 110a, at least a portion of the moving rod 320 will also be inserted into the tube base material 110a. You can.

The expansion body 310 has a plurality of groove forming protrusions 313 provided to form a plurality of grooves 113 on the inner surface of the tube base material 110a when inserted into the tube base material 110a. may include.

A plurality of groove forming protrusions 313 may be formed on the outer surface of the expanded tube body 310. When the expansion body 310 is inserted into the tube base material 110a and moved in the L1 direction, the plurality of groove forming protrusions 313 may contact the inner surface of the tube base material 110a and form a plurality of grooves 113. .

Each of the plurality of groove forming protrusions 313 may be formed to protrude in an outward direction of the expansion body 310. Each of the plurality of groove forming protrusions 313 may be formed to protrude in a direction toward the inner surface of the tube base material 110a when the expanded tube body 310 is inserted into the tube base material 110a. Each of the plurality of groove forming protrusions 313 may be formed to protrude in a direction approximately parallel to the X-Y plane.

Each of the plurality of grooves 113 may be formed to be concavely recessed on the inner surface of the tube base material 110a. The plurality of grooves 113 may be formed to correspond to the shape of the plurality of groove forming protrusions 313.

As an example, the plurality of groove forming protrusions 313 may form a plurality of grooves 113 on the inner surface of the tube base material 110a through press processing. As an example, the plurality of groove forming protrusions 313 may form a plurality of grooves 113 on the inner surface of the tube base material 110a through cutting processing.

Each of the plurality of grooves 113 may extend obliquely in one direction (Z) from the inner surface of the tube base material 110a. In other words, each of the plurality of grooves 113 may be formed to extend in a substantially spiral direction from the inner surface of the tube base material 110a. Each of the plurality of grooves 113 may be arranged parallel to each other. Accordingly, as shown in FIG. 12, the inner surface of the refrigerant tube 110 after the tube base material 110a is processed is provided with a plurality of grooves 113 extending in a substantially spiral direction along the longitudinal direction of the refrigerant tube 110. can be formed.

The expansion body 310 includes a plurality of groove forming protrusions 313, and when inserted into the tube base material 110a, a plurality of grooves 113 inclined in one direction (Z) are formed on the inner surface of the tube base material 110a. It can be arranged to form.

The plurality of groove forming protrusions 313 may extend from the outer surface of the expansion body 310 along a direction inclined with respect to one direction (Z). In other words, each of the plurality of groove forming protrusions 313 may extend in a spiral direction along one direction (Z). The plurality of grooves 113 may be formed to extend in a direction parallel to the direction in which the plurality of groove forming protrusions 313 extend from the inner surface of the tube base material 110a.

The expansion body 310 may be rotatable with respect to the movable rod 320 . In detail, the expansion body 310 may be provided to be rotatable around the movable rod 320. The expansion body 310 may be rotatable about a rotation axis in the direction (Z) in which the movable rod 320 extends. The expansion body 310 may be rotatable about a rotation axis in one direction (Z) in which the expansion body 310 and the moving rod 320 can move linearly.

As an example, the expansion body 310 may be rotatable along the outer circumferential direction of the expansion body 310 with respect to the moving rod 320. The outer circumferential direction of the expansion body 310 may be parallel to the X-Y plane.

When the expanded tube body 310 is inserted into the tube base material 110a and moved in the L1 direction, the inner surface of the tube base material 110a may be pressed by the plurality of groove forming protrusions 313. Correspondingly, when the expansion body 310 is inserted into the tube base material 110a and moves in the L1 direction, the plurality of groove forming protrusions 313 may be provided to be pressed by the inner surface of the tube base material 110a.

The expansion body 310 may be provided to rotate around the moving rod 320 as the plurality of groove forming protrusions 313 are pressed against the inner surface of the tube base material 110a.

In detail, when the expansion body 310 is moved in the direction L1 in which it is inserted into the tube base material 110a, each of the plurality of groove forming protrusions 313 is inclined with respect to the inner surface of the tube base material 110a and the L1 direction. You can access it in the direction of the photo. Accordingly, each of the plurality of groove forming protrusions 313 can be pressed in one direction (Z) and an inclined direction by the inner surface of the tube base material 110a, and the expansion body 310 is on the inner surface of the tube base material 110a. It can be pressed in one direction (Z) and an inclined direction.

Here, since the expansion body 310 is provided to be rotatable with respect to the moving rod 320, the expansion body 310 rotates as it is pressed by the inner surface of the tube mother material 110a when inserted into the tube mother material 110a. can do.

As shown in FIGS. 4 to 12 , the expansion body 310 may be arranged to rotate in the first rotation direction R1 when inserted into the tube base material 110a.

As the expansion tube body 310 moves linearly in the L1 direction and rotates in the first rotation direction (R1), a plurality of groove forming protrusions 313 provided on the outer surface of the expansion tube body 310 are formed on the inner surface of the tube base material 110a. A plurality of grooves 113 extending approximately in a spiral direction may be formed. As described above, the plurality of grooves 113 may extend obliquely in one direction (Z) from the inner surface of the tube base material 110a.

Each of the plurality of groove forming protrusions 313 may include one end in the direction L1 inserted into the tube base material 110a and the other end opposite thereto. At this time, each of the plurality of groove forming protrusions 313 may extend obliquely in the first rotation direction R1 with respect to one direction Z from the other end to one end thereof.

Due to the above configuration, the expansion body 310 can rotate in the first rotation direction R1 when inserted into the tube base material 110a.

When the plurality of groove forming protrusions 313 extend obliquely in a direction opposite to the inclined direction in FIG. 4 with respect to one direction (Z), the expansion body 310 is inserted into the tube base material 110a as shown in FIG. 4 It can rotate in a direction opposite to the rotation direction (R1) in .

The plurality of grooves 113 may be formed to extend obliquely in the first rotation direction R1 with respect to the L1 direction on the inner surface of the tube base material 110a. The direction in which the plurality of grooves 113 extend may vary depending on the extending direction of the plurality of groove forming protrusions 313 or the rotation direction of the expanded tube body 310.

The angle at which the extension direction of each of the plurality of groove forming protrusions 313 is inclined with respect to one direction (Z) is determined by the distance that the expansion body 310 moves in the L1 direction when inserted into the tube base material 110a and the expansion body 310 ) may correspond to the ratio of the distance that the outer surface moves in the first rotation direction (R1).

When the expansion body 310 moves in a direction opposite to the L1 direction and separates from the tube base material 110a, the expansion body 310 may rotate in a direction opposite to the first rotation direction R1, but is not limited to this. does not

The plurality of groove forming protrusions 313 may be arranged side by side in the outer circumferential direction of the expansion body 310. However, the present invention is not limited to this, and at least some of the plurality of groove forming protrusions 313 may be arranged not parallel to each other.

The plurality of groove forming protrusions 313 may be arranged at even intervals along the outer circumferential direction of the expansion body 310. However, the present invention is not limited to this, and the plurality of groove forming protrusions 313 may be arranged at uneven intervals from each other.

The expansion body 310 may include a tapered portion 311. The tapered portion 311 may have a tapered shape whose width narrows in the direction L1 in which it is inserted into the tube base material 110a.

By the tapered portion 311, the expanded tube body 310 can be guided when inserted into the interior of the tube base material 110a. As the tapered portion 311 is inserted into the tube base material 110a starting from the narrow portion, the expanded tube body 310 can be stably inserted into the tube base material 110a.

In addition, the width of the tapered portion 311 that presses the inner surface of the tube base material 110a may become wider as it is inserted into the tube base material 110a. Accordingly, the external force that the tube base material 110a receives from the tapered portion 311 can gradually increase, and the tube base material 110a can be prevented from being damaged during the expansion process.

At least a portion of the plurality of groove forming protrusions 313 may be disposed on the outer surface of the tapered portion 311.

The expansion body 310 may include a cylinder portion 312 having a cylindrical shape. The cylinder portion 312 may extend in one direction (Z).

The above-described tapered portion 311 may extend from the cylinder portion 312 in one direction (Z). The tapered portion 311 may extend from one end of the cylinder portion 312 in the direction L1 in which it is inserted into the tube base material 110a. In other words, the cylinder portion 312 may extend from one end of the tapered portion 311 in a direction opposite to the direction L1 in which the tapered portion 311 is inserted into the tube base material 110a.

The width of the cylinder portion 312 may have a size corresponding to the width of one end of the tapered portion 311 on the side opposite to the direction L1 in which the tapered portion 311 is inserted into the tube base material 110a. In detail, the width of the cylinder portion 312 may be the same or similar to the maximum width of the tapered portion 311.

At least a portion of the plurality of groove forming protrusions 313 may be disposed on the outer surface of the cylinder portion 312.

A portion of the plurality of groove forming protrusions 313 disposed on the outer surface of the tapered portion 311 and another portion of the plurality of groove forming protrusions 313 disposed on the outer surface of the cylinder portion 312 may be connected to each other.

The moving rod 320 extends along one direction (Z), and at least a portion may be disposed inside the expansion body 310. The moving rod 320 may be disposed on the central axis of the expansion body 310. The moving rod 320 may be disposed on the rotation axis of the expansion body 310. The expansion body 310 may be rotatable around the movable rod 320 .

The expansion body 310 may include a hollow formed inside so that at least a portion of the moving rod 320 is disposed.

A hollow may be formed inside the tapered portion 311. The hollow portion of the tapered portion 311 may extend in one direction (Z). As an example, the hollow of the tapered portion 311 may be formed to have a different width along one direction (Z). As an example, the hollow portion of the tapered portion 311 may be formed to have a constant width along one direction (Z).

A hollow may be formed inside the cylinder portion 312. The cylinder portion 312 may be formed to have a hollow cylindrical shape. For example, the hollow of the cylinder portion 312 may have a constant width and may be formed to extend in one direction (Z), but is not limited thereto.

The expansion body 310 may include a first end 314 in the direction L1 in which the tube base material 110a is inserted, and a second end 315 opposite to the first end 314. The first end 314 and the second end 315 may be arranged side by side in one direction (Z).

As an example, the first end 314 may be provided on one side of the tapered portion 311 in the L1 direction. For example, the second end 315 may be provided on one side of the cylinder portion 312 in a direction opposite to the L1 direction.

As an example, the first end 314 may be formed to have a substantially flat shape. The first end 314 may be formed parallel to the X-Y plane. As an example, the second end 315 may be formed to have a substantially flat shape. The second end 315 may be formed parallel to the X-Y plane.

However, the present invention is not limited thereto, and the first end 314 and the second end 315 may be formed to have various shapes.

The expansion body 310 may include a first hole 314a formed in the first end 314 and a second hole 315a formed in the second end 315. The first hole 314a and the second hole 315a may be arranged side by side in one direction (Z).

As an example, the first hole 314a may be formed in the tapered portion 311. As an example, the second hole 315a may be formed in the cylinder portion 312.

As an example, the first hole 314a may be formed in approximately the center of the tapered portion 311. For example, the second hole 315a may be formed in approximately the center of the cylinder portion 312.

The hollow of the above-described expansion body 310 may be formed between the first hole 314a and the second hole 315a.

The moving rod 320 may pass through the first hole 314a and the second hole 315a. At least a portion of the moving rod 320 may be located between the first hole 314a and the second hole 315a.

Specifically, the moving rod 320 may include an extension portion 321 extending in one direction (Z). As an example, the extension part 321 may be connected to the actuator 32 to receive power for linear movement.

The extension portion 321 may be disposed to penetrate the first hole 314a and the second hole 315a. At least a portion of the extension portion 321 may be located between the first hole 314a and the second hole 315a. At least a portion of the extension portion 321 may be located inside the expansion body 310.

The moving rod 320 may include a head portion 322. The head portion 322 may contact the first end 314 on the outside of the expanded tube body 310. The head portion 322 may contact the first end 314 in one direction (Z).

The head portion 322 may be provided on one side of the moving rod 320. The head portion 322 may be located on one side of the extension portion 321 in the L1 direction.

The head portion 322 may cover the first hole 314a. The head portion 322 has a width w2 in a direction orthogonal to one direction (Z) (i.e., width in a direction parallel to the X-Y plane) in a direction orthogonal to one direction (Z) of the first hole 314a. It may be formed to be wider than the width w1. This means that the width (w2) of at least a portion of the head portion 322 may be wider than the width (w1) of the first hole 314a, and the width of all portions of the head portion 322 must be wider than the width (w1) of the first hole 314a. It does not mean that it is wider than the width (w1) of (314a).

With this configuration, when the moving rod 320 moves linearly in the direction opposite to the L1 direction, the head portion 322 may not deviate from the position in contact with the expansion body 310. When the moving rod 320 moves linearly in the direction opposite to the L1 direction, the head portion 322 can press the first end 314 of the expansion tube body 310, and the expansion body 310 can press the first end 314 of the expansion tube body 310 in the L1 direction. It moves in the opposite direction and may be separated from the tube base material (110a).

The head portion 322 includes a first portion 322a adjacent to the expanded tube body 310 and a second portion 322b located in the direction L1 in which the first portion 322a is inserted into the tube base material 110a. can do.

As the first part 322a of the head part 322 moves from the expansion body 310 toward the second part 322b, the direction perpendicular to one direction (Z) (i.e., the width in the direction parallel to the X-Y plane) It can be formed to increase the width. In other words, the first portion 322a may be formed so that the width in the direction opposite to the L1 direction is narrowest. Accordingly, the contact area between the first part 322a and the first end 314 may be reduced, and friction between the first part 322a and the first end 314 may be reduced. Accordingly, the expansion body 310 can rotate more efficiently with respect to the moving rod 320.

The head portion 322 may be formed integrally with the extension portion 321, but is not limited thereto.

The moving rod 320 may include a pressing portion 323. The pressing portion 323 may contact the second end 315 on the outside of the expansion body 310. The pressing portion 323 may contact the second end 315 in one direction (Z).

The pressing portion 323 may be provided to press the second end 315a in one direction (Z) when moving linearly in one direction (Z). In detail, the pressing portion 323 may include a pressing surface 323s in contact with the second end 315 in one direction (Z). The pressing unit 323 may press the second end 315 in contact with the pressing surface 323s in the L1 direction when the movable rod 320 moves in the L1 direction.

The pressing portion 323 may cover the second hole 315a. The pressing portion 323 has a width (w4) in a direction orthogonal to one direction (Z) (i.e., width in a direction parallel to the X-Y plane) in a direction orthogonal to one direction (Z) of the second hole 315a. It can be formed to be wider than the width (w3). This means that the width (w4) of at least a portion of the pressing portion 323 may be wider than the width (w3) of the second hole 315a, and the width of all portions of the pressing portion 323 must be wider than the width of the second hole 315a. It does not mean that it is wider than the width (w3) of (315a).

With this configuration, when the movable rod 320 moves linearly in the L1 direction, the pressing unit 323 can press the expansion body 310 in the L1 direction.

The pressing portion 323 may be formed in a substantially flat plate shape. The pressing surface 323s may be formed to be approximately flat. As an example, the pressing surface 323s may extend in a direction parallel to the X-Y plane. However, the present invention is not limited to this, and the pressing portion 323 may be formed to have various shapes.

The pressing part 323 may be fixed to the extension part 321 of the movable rod 320.

The pressing portion 323 and the extension portion 321 may be formed in distinct configurations and then combined, but are not limited thereto.

Hereinafter, an example of a configuration in which the expansion body 310 is rotatable with respect to the movable rod 320 will be described in detail.

The expansion mandrel 300 may include a bearing 330 provided between the expansion body 310 and the moving rod 320. The bearing 330 may be configured to reduce friction between the expanded tube body 310 and the moving rod 320, and accordingly, the expanded tube body 310 may be rotatable with respect to the moving rod 320.

The bearing 330 may be provided inside the expansion body 310. The bearing 330 may be provided between the first end 314 and the second end 315. A bearing 330 may be disposed in the hollow of the expansion body 310 described above. The bearing 330 may be disposed between the inner peripheral surface of the expansion body 310 and the outer peripheral surface of the moving rod 320. As an example, the bearing 330 may be in contact with the inner peripheral surface of the expansion body 310 and the outer peripheral surface of the moving rod 320, respectively.

Bearing 330 may include a plurality of bearings 330. A plurality of bearings 330 may be arranged along the longitudinal direction of the expansion body 310. A plurality of bearings 330 may be arranged along the longitudinal direction of the moving rod 320. A plurality of bearings 330 may be arranged along one direction (Z).

The bearing 330 may include a plurality of rolling elements 331 disposed between the inner peripheral surface of the expanded tube body 310 and the outer peripheral surface of the moving rod.

A plurality of rolling elements 331 may be arranged along the circumferential direction of the expansion body 310. A plurality of rolling elements 331 may be arranged along the inner peripheral surface of the expanded tube body 310. The plurality of rolling elements 331 may be arranged along the outer peripheral surface of a portion of the moving rod 320 located inside the expanded tube body 310. As an example, the plurality of rolling elements 331 may be arranged in parallel with the X-Y plane.

As described above, when a plurality of bearings 330 are provided, each of the plurality of bearings 330 may include a plurality of rolling elements 331, and each of the plurality of bearings 330 may include a plurality of rolling elements 331. ) may be arranged along the circumferential direction of the expansion body 310.

By the above configuration, the expansion body 310 can be provided to be rotatable with respect to the moving rod 320.

The structure of the bearing 330 described above is only an example of a configuration in which the expansion tube body is provided to rotate with respect to the moving rod in the heat exchanger manufacturing apparatus according to the spirit of the present disclosure, and the spirit of the present disclosure is limited thereto. It doesn't work.

In FIG. 5 and the like, the plurality of rolling elements 331 are shown as being arranged to contact each other, but the present invention is not limited thereto. In addition, in FIG. 5 and the like, each of the plurality of rolling elements 331 is shown as being in contact with the inner peripheral surface of the expansion body 310 and the outer peripheral surface of the moving rod 320, but the present invention is not limited thereto.

As an example, the bearing provided between the expansion body 310 and the moving rod 320 includes an outer ring (not shown), an inner ring (not shown), a plurality of rolling elements provided between the outer ring and the inner ring, and a plurality of rolling elements. It may be configured to include a retainer (not shown) that maintains the gap between them.

As an example, the plurality of rolling elements may be arranged to be spaced apart from each other along the circumferential direction of the expansion body 310.

As an example, the plurality of rolling elements may be arranged to be spaced apart from each other along the longitudinal direction of the expansion body 310.

Additionally, the bearings may be arranged in a different direction than shown in FIG. 5 or the like.

As an example, the plurality of rolling elements may be arranged to be inclined at a predetermined angle with respect to one direction (Z). As an example, the plurality of rolling elements may be arranged in a direction parallel to the extension direction of the plurality of groove forming protrusions 313.

In addition, the bearing is not limited to being located only inside the expansion body 310, and is located between the pressing surface 323s of the pressing part 323 and the second end 315, the first part of the head part 322 ( It may be provided at various locations where friction may occur between the expansion tube body 310 and the moving rod 320, such as between 322a) and the first end 314.

In addition, in FIG. 5 and the like, the bearing is shown as if it is composed of a ball bearing including a plurality of rolling elements formed in a substantially spherical shape, but the spirit of the present disclosure is not limited thereto.

As an example, the bearing may be composed of a roller bearing in which a plurality of rolling elements are formed in a cylindrical shape.

Or, as an example, the bearing may be configured as a sleeve bearing.

Alternatively, the expansion mandrel 300 may be provided so that friction between the expansion body 310 and the moving rod 320 is reduced by fluid.

For example, during the pipe expansion process, expansion oil may be injected into the tube base material 110a to reduce friction between the tube base material 110a and the expansion mandrel 300. The expansion mandrel 300 is inserted into the tube base material 110a injected with expansion oil and can expand the tube base material 110a.

At this time, as the expansion mandrel 300 moves in the L1 direction, some of the expansion oil may flow through at least one component of the expansion mandrel 300. The expansion mandrel 300 may be provided with an oil flow hole (not shown) formed to allow expansion oil to flow.

For example, the oil flow hole may be formed in the first end 314 or the second end 315 of the expanded tube body 310 to communicate with the internal hollow of the expanded tube body 310. Alternatively, as an example, the oil flow hole may be formed in the head portion 322 of the moving rod 320.

For example, the expansion oil flowing through the oil flow hole may flow along the space between the expansion body 310 and the moving rod 320. In detail, the expansion oil flows in from the first end 314 and flows along the space between the inner surface of the expansion tube body 310 and the outer surface of a portion of the moving rod 320 located inside the expansion tube body 310. and can be discharged through the second stage (315).

Alternatively, as an example, the expanded oil flowing through the oil flow hole may flow along a flow path (not shown) formed inside each of the expanded tube body 310 or the moving rod 320, and the expanded tube flowing along the flow path may flow. Some of the oil may flow into the space or contact surface between the expansion body 310 and the moving rod 320.

As an example, the expansion oil is between the first hole 314a and the moving rod 320, between the second hole 315a and the moving rod 320, and the first end 314 and the head portion 322 (especially , it may flow along various areas, such as between the first portion 322a) and between the second end 315 and the pressing portion 323 (in particular, the pressing surface 323s).

The type of material that can be applied to reduce friction between the expansion body 310 and the moving rod 320 is not limited to expansion oil and can be provided in various ways.

By the above configuration, as shown in FIG. 11, when the expansion mandrel 300 is inserted into the tube base material 110a, the tube base material 110a can be expanded. As shown in FIG. 12, when the expansion mandrel 300 is inserted into the tube base material 110a, a plurality of grooves 113 may be formed on the inner surface of the tube base material 110a. That is, a plurality of grooves 113 may be provided on the inner surface of the refrigerant tube 110 after processing.

As a plurality of grooves 113 are provided on the inner surface of the refrigerant tube 110, the area in which the refrigerant flowing along the inside of the refrigerant tube 110 contacts the inner surface of the refrigerant tube 110 can be expanded, The heat transfer area can be increased.

In particular, as the plurality of grooves 113 extend in a substantially spiral direction, the length of the plurality of grooves 113 can be increased compared to the case where the plurality of grooves 113 extend in only one direction, and the heat transfer area of the refrigerant can be further increased. there is.

In addition, as the plurality of grooves 113 extend approximately in a spiral direction, the flow of refrigerant flowing along the refrigerant tube 110 can flow in a direction corresponding to the spiral direction, and the heat transfer coefficient of the refrigerant can be increased. there is.

Accordingly, heat exchange efficiency between the refrigerant and external air can be improved.

In addition, since the tube base material 110a is expanded by the expansion mandrel 300 and a plurality of grooves 113 are formed inside the tube base material 110a, manufacturing time and manufacturing cost can be reduced.

In addition, compared to the case where the expansion process of the tube base material 110a is performed after forming the plurality of grooves 113 on the inner surface of the tube base material 110a, the expansion of the tube base material 110a and the plurality of grooves 113 ), the plurality of grooves 113 can be prevented from being damaged due to wear, etc.

In addition, since the expansion body 310 is provided to rotate as the plurality of groove forming protrusions 313 are pressed against the inner surface of the tube base material 110a, the expansion body 310 can rotate simultaneously when moving linearly in one direction. . Therefore, the ratio of the linear movement distance and rotation distance of the plurality of groove forming protrusions 313 with respect to the inner surface of the tube base material 110a can be maintained within a certain range, and the accuracy of forming the plurality of grooves 113 can be improved. You can.

In addition, a separate drive source that supplies power to rotate the expansion body 310 with respect to the moving rod 320 is not required, so manufacturing time and cost can be reduced.

Figure 13 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 14 is an enlarged cross-sectional view of a plurality of groove forming protrusions cut in the transverse direction in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure.

In describing the embodiments of FIGS. 13 and 14, the same components as those shown in FIGS. 1 to 12 may be assigned the same reference numerals and descriptions may be omitted.

Referring to FIGS. 7, 13, and 14, the thickness of each of the plurality of groove forming protrusions 313, 1313-1, and 1313-2 of the expansion body 310 may be provided in various ways. The thickness of each of the plurality of groove forming protrusions 313, 1313-1, and 1313-2 herein refers to the thickness in the cross section, that is, the thickness in the X-Y plane. In detail, the thickness of each of the plurality of groove forming protrusions 313, 1313-1, and 1313-2 may be defined as the thickness of the outer end, that is, the tip.

In the embodiment shown in FIG. 7, each of the plurality of groove forming protrusions 313 may have a thickness t0.

In the embodiment shown in FIG. 13, each of the plurality of groove forming protrusions 1313-1 may have a thickness of t1. Thickness t1 may be greater than thickness t0.

In the embodiment shown in FIG. 14, each of the plurality of groove forming protrusions 1313-2 may have a thickness close to approximately 0.0. Here, the unit of thickness may be mm, for example.

When the thickness of the groove forming protrusions 313, 1313-1, and 1313-2 of the expansion body 310 increases within a predetermined range, the expansion efficiency of the tube base material 110a may be improved.

For example, when the expansion body 310 has a groove forming protrusion 1313-1 with a thickness t1, a plurality of groove forming protrusions 313 with a thickness t0 or a groove forming protrusion 1313-1 with a thickness close to approximately 0.0 Compared to the case of having 2), the expansion efficiency of the tube base material 110a can be improved. That is, when the expansion body 310 has a groove forming protrusion 1313-1 with a thickness t1, a plurality of groove forming protrusions 313 with a thickness t0 or a groove forming protrusion 1313-2 with a thickness close to approximately 0.0. The diameter of the refrigerant tube 110 after processing can be improved compared to the case of having .

The depth of each of the plurality of grooves 113 formed by the plurality of groove forming protrusions 313, 1313-1, and 1313-2 (i.e., the depth depressed in the inner surface of the refrigerant tube 110) is formed by forming the plurality of grooves. If the thickness of each of the protrusions 313, 1313-1, and 1313-2 is too large or too small, it may not be sufficiently secured.

For example, a plurality of grooves 113 formed by a plurality of groove forming protrusions 313 with a thickness t0 are formed by a groove forming protrusion 1313-1 with a thickness t1 and a groove forming protrusion 1313-1 with a thickness close to 0.0. It may be formed to be deeper than the plurality of grooves 113 formed by 2).

In the heat exchanger manufacturing apparatus according to the spirit of the present disclosure, the plurality of groove forming protrusions may have various thicknesses depending on the purpose of design.

Figure 15 is a diagram showing an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 16 is a diagram illustrating an example of a process of expanding a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

In describing the embodiments of FIGS. 15 and 16, the same components as those shown in FIGS. 1 to 14 may be assigned the same reference numerals and descriptions may be omitted.

For example, in the embodiment of Figure 15, expansion mandrel 2300-1 may include a moving rod 320 and an expansion body 2310-1. The expansion body 2310-1 may include a tapered portion 2311-1 and a cylinder portion 2312-1. The configuration of the tapered portion 2311-1, the cylinder portion 2312-1, and the expansion mandrel 2300-1 including the same may have characteristics corresponding to the expansion mandrel 300 of FIG. 11.

For example, in the embodiment of Figure 16, expansion mandrel 2300-2 may include a moving rod 320 and an expansion body 2310-2. The expansion body 2310-2 may include a tapered portion 2311-2 and a cylinder portion 2312-2. The configuration of the tapered portion 2311-2, the cylinder portion 2312-2, and the expansion mandrel 2300-2 including the same may have characteristics corresponding to the expansion mandrel 300 of FIG. 11.

Referring to FIGS. 11, 15, and 16, the expansion bodies 310, 2310-1, and 2310-2 may include tapered portions 311, 2311-1, and 2311-2 of various shapes.

For example, the tapered portions 311, 2311-1, and 2311-2 of the expansion bodies 310, 2310-1, and 2310-2 may have various angles between the inclined outer surface and the X-Y plane. Hereinafter, the angle formed between the inclined outer surface of the tapered portion (311, 2311-1, 2311-2) and the X-Y plane is referred to as the angle of the tapered portion (311, 2311-1, 2311-2) for convenience.

In the embodiment of Figure 11, the tapered portion 311 of the expansion body 310 may have an angle of a0. In FIG. 11, the angle a0 is shown to be approximately 72 degrees, but is not limited thereto.

In the embodiment of Figure 15, the tapered portion 2311-1 of the expansion body 2310-1 may have an angle of a1. Angle a1 may be smaller than angle a0. In FIG. 15, the angle a1 is shown to be approximately 52 degrees, but is not limited thereto.

In the embodiment of Figure 16, the tapered portion 2311-2 of the expansion body 2310-2 may have an angle of a2. Angle a2 can be larger than angle a0. In FIG. 16, the angle a2 is shown to be approximately 82 degrees, but is not limited thereto.

As the angle of the tapered portions 311, 2311-1, and 2311-2 increases within a predetermined range, the expansion efficiency of the tube base material 110a can be improved.

For example, the expanded body 2310-2 including the tapered portion 2311-2 of angle a2 is the expanded body 310 including the tapered portion 311 of angle a0 or the tapered portion 2311- of angle a1. Compared to the expansion body 2310-1 including 1), the expansion efficiency of the tube base material 110a can be improved. That is, the expanded body 2310-2 including the tapered portion 2311-2 of angle a2 is the expanded body 310 including the tapered portion 311 of angle a0 or the tapered portion 2311-1 of angle a1. The diameter of the refrigerant tube 110 after processing may be improved compared to the expanded tube body 2310-1 including.

As the angle of the tapered portions 311, 2311-1, and 2311-2 decreases within a predetermined range, the depth of each of the plurality of grooves 113 formed by the plurality of groove forming protrusions 313 (i.e., the refrigerant tube) decreases. (Depth of depression on the inner surface of 110) may increase.

For example, a plurality of grooves 113 formed by a plurality of groove forming protrusions 313 of the expansion body 2310-1 including a tapered portion 2311-1 of angle a1 are formed by a tapered portion of angle a0 ( By the plurality of groove forming protrusions 313 of the expanded tube body 310 including 311) and the plurality of groove forming protrusions 313 of the expanded tube body 2310-2 including the tapered portion 2311-2 of angle a2. It may be formed to be deeper than the plurality of grooves 113 formed.

In the heat exchanger manufacturing apparatus according to the spirit of the present disclosure, the angle of the tapered portion may have various thicknesses depending on the purpose of design, etc.

In describing the embodiment of FIG. 17, the same reference numerals may be assigned to the same components as those shown in FIGS. 1 to 16 and the description may be omitted.

Referring to FIG. 17, the expansion mandrel 3300 includes a moving rod 3320 capable of linear movement in one direction (Z), and an expansion body 3310 connected to the moving rod 3320 and capable of linear movement in one direction (Z). may include. The expansion body 3310 may be provided to be rotatable with respect to the moving rod 3320.

The configuration of the movable rod 3320 may have characteristics corresponding to the configuration of the movable rod 320 shown in FIGS. 1 to 16 .

The expansion body 3310 is formed on the outer surface of the expansion body 3310 and has a plurality of groove forming protrusions 3313 that form a plurality of grooves 113 on the inner surface of the tube mother material 110a when inserted into the tube mother material 110a. may include. The configuration of the plurality of groove forming protrusions 3313 may have characteristics corresponding to the configuration of the plurality of groove forming protrusions 313, 1313-1, and 1313-2 shown in FIGS. 1 to 16.

The expansion body 3310 may include a tapered portion 3311 and a cylinder portion 3312. The configurations of the tapered portion 3311 and the cylinder portion 3312 are the tapered portions 311, 2311-1, and 2311-2 and the cylinder portions 312, 2312-1, and 2312-2 shown in FIGS. 1 to 16, respectively. It may have characteristics corresponding to the configuration of .

The tapered portion 3311 may include a plain area 3311a in which the groove forming protrusion 3313 is not formed and a groove area 3311b in which the groove forming protrusion 3313 is formed.

On the outer surface of the expanded tube body 3310, a plurality of groove forming protrusions 3313 may be provided in the groove area 3311b of the cylindrical part 3312 and the tapered part 3311.

The plain area 3311a may be formed in the direction L1 in which the groove area 3311b is inserted into the tube base material 110a.

In the process of inserting the expansion mandrel 3300 into the tube base material 110a while moving in the L1 direction, when the plain area 3311a contacts the inner surface of the tube base material 110a, the groove 113 is not formed, and the tube base material ( The groove 113 may be formed when the groove area 3311b contacts the inner surface of 110a).

The ratio of the area occupied by the plain area 3311a and the area occupied by the groove area 3311b is not limited to that shown in FIG. 17.

In describing the embodiment of FIG. 18, the same reference numerals may be assigned to the same components as those shown in FIGS. 1 to 17 and the description may be omitted.

Referring to FIG. 18, the expansion mandrel 4300 includes a moving rod 4320 capable of linear movement in one direction (Z), and an expansion body 4310 connected to the moving rod 4320 and capable of linear movement in one direction (Z). may include. The expansion body 4310 may be provided to be rotatable with respect to the moving rod 4320.

The expansion body 4310 is formed on the outer surface of the expansion body 4310 and has a plurality of groove forming protrusions 4313 that form a plurality of grooves 113 on the inner surface of the tube mother material 110a when inserted into the tube mother material 110a. may include. The configuration of the plurality of groove forming protrusions 4313 may have characteristics corresponding to the configuration of the plurality of groove forming protrusions 313, 1313-1, 1313-2, and 3313 shown in FIGS. 1 to 17.

The expanded tube body 4310 may include a first end 4314 on the side in which the tube base material 110a is inserted, and a second end 4315 opposite to the first end 4314.

The expanded body 4310 may be formed to have a shape whose width narrows in the direction L1 in which it is inserted into the tube base material 110a from the second end 4315 to the first end 4314. That is, the expansion body 4310 may have an overall tapered shape.

The configuration of the moving rod 4320 may have characteristics corresponding to the configuration of the moving

rods

320 and 3320 shown in FIGS. 1 to 17 .

The moving rod 4320 may include an extension part 4321, a head part 4322, and a pressing part 4323. The extension part 4321, the head part 4322, and the pressing part 4323 have features corresponding to the configuration of the extension part 321, the head part 322, and the pressing part 323 shown in FIGS. 1 to 16, respectively. You can have

The extension portion 4321 may be disposed to penetrate the first end 4314 and the second end 4315.

The head portion 4322 may contact the first end 4314 on the outside of the expansion body 4310 in one direction (Z).

The pressing portion 4323 may contact the second end 4315 on the outside of the expansion body 4310 in one direction (Z).

Figure 19 is a diagram showing an expansion mandrel of a heat exchanger manufacturing apparatus according to an embodiment of the present disclosure. Figure 20 is a longitudinal cross-sectional view of the expansion mandrel of Figure 19. Figure 21 is a diagram showing an example of the process of expanding the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

In describing the embodiments of FIGS. 19 to 21, the same components as those shown in FIGS. 1 to 18 may be assigned the same reference numerals and descriptions may be omitted.

Referring to FIGS. 19 and 21, the expansion mandrel 5300 has a moving rod 5321 that can move linearly in one direction (Z) and can be inserted into the tube base material 110a so that the tube base material 110a is expanded. It may include an expansion body 5310 provided to do so.

The expansion body 5310 may include a rotating part 5311 rotatable with respect to the movable rod 5320 and a fixing ball 5312 fixed to the movable rod 5320. The fixing ball 5312 may be positioned in the direction L1 in which the rotating part 5311 is inserted into the tube base material 110a.

The rotating part 5311 and the fixed ball 5312 may be formed in distinct configurations. The rotating part 5311 may be provided to be rotatable with respect to the fixed ball 5312.

The rotating part 5311 may be formed in a cylindrical shape extending approximately in one direction (Z). However, the present invention is not limited to this, and the rotating part 5311 may be formed to have various shapes.

The rotating part 5311 may include a first end 5311a in the direction L1 inserted into the tube base material 110a, and a second end 5311b opposite to the first end 5311a.

The first end 5311a may be in contact with the fixing ball 5312. The second end 5311b may be located in a direction opposite to the fixing ball 5312.

The rotating part 5311 may include a first hole 5311aa formed in the first end 5311a and a second hole 5311bb formed in the second end 5311b.

The rotating part 5311 may have a hollow interior formed so that at least a portion of the moving rod 5320 is located therein. The hollow of the rotating part 5311 may be formed between the first hole 5311aa and the second hole 5311bb.

The fixing ball 5312 may include a first part 5312a adjacent to the rotating part 5311, and a second part 5312b located in a direction in which the first part 5312a is inserted into the tube base material 110a. .

The first end (5311a) of the rotating part (5311) may contact the first part (5312a) of the fixed ball (5312). In detail, the first end 5311a of the rotating part 5311 may contact the first part 5312a of the fixed ball 5312 in one direction (Z).

The first portion 5312a of the fixing ball 5312 may cover the first hole 5311aa. The width of the first portion 5312a of the fixing ball 5312 may be larger than the width of the first hole 5311aa.

The fixing ball 5312 may include a first partial hole 5312aa formed in the first part 5312a and a second partial hole 5312bb formed in the second part 5312b.

The first partial hole 5312aa may be formed at one end of the first portion 5312a in a direction opposite to the L1 direction. The second partial hole 5312bb may be formed at one end of the second portion 5312b in the L1 direction.

The fixed ball 5312 may have a hollow interior formed so that at least a portion of the moving rod 5320 is located therein. The hollow of the fixing ball 5312 may be formed between the first partial hole 5312aa and the second partial hole 5312bb.

The first part 5312a of the fixing ball 5312 may be formed so that its width in a direction perpendicular to one direction Z increases as it moves from the rotating part 5311 toward the second part 5312b. In other words, the first portion 5312a may be formed so that the width in the direction opposite to the L1 direction is narrowest. Accordingly, the contact area between the first part 5312a and the first end 5311a may be reduced, and the friction between the first part 5312a and the first end 5311a may be reduced. Accordingly, the rotating part 5311 can rotate more efficiently around the moving rod 5320.

The moving rod 5320 may include an extension part 5321 extending in one direction (Z), a head part 5322, and a pressing part 5323.

The extension portion 5321 may penetrate the first hole 5311aa and the second hole 5311bb. At least a portion of the extension part 5321 may be located in the hollow inside the rotating part 5311.

The extension portion 5321 may penetrate the first partial hole 5312aa and the second partial hole 5312bb. At least another part of the extension part 5321 may be located in the hollow inside the fixing ball 5312.

The head portion 5322 may contact the end of the second portion 5312b of the fixing ball 5312 from the outside of the fixing ball 5312. In detail, the head portion 5322 may contact the end of the second portion 5312b of the fixing ball 5312 in one direction (Z).

The head portion 5322 may cover the second partial hole 5312bb. The width of the head portion 5322 may be wider than the width of the second partial hole 5312bb.

The pressing part 5323 may contact the second end 5311b of the rotating part 5311 from the outside of the rotating part 5311. In detail, the pressing part 5323 may contact the second end 5311b of the rotating part 5311 in one direction (Z).

The pressing portion 5323 may cover the second hole 5311bb. The width of the pressing portion 5323 may be wider than the width of the second hole 5311bb.

The expansion mandrel 5300 may include a plurality of groove forming protrusions 5313 provided to form a plurality of grooves 113 on the inner surface of the tube base material 110a when inserted into the tube base material 110a. A plurality of groove forming protrusions 5313 may be formed on the outer surface of the rotating part 5311.

The plurality of groove forming protrusions 5313 may extend obliquely in one direction (Z). The plurality of groove forming protrusions 5313 may extend in a substantially spiral direction along one direction (Z) from the outer surface of the rotating part 5311.

The configuration of the plurality of groove forming protrusions 5313 may have characteristics corresponding to the configuration of the plurality of groove forming protrusions 313, 1313-1, 1313-2, 3313, and 4313 shown in FIGS. 1 to 18.

The expansion mandrel 5300 may include a bearing 5330 provided between the rotating part 5311 and the moving rod 5320. The bearing 5330 may be configured to reduce friction between the rotating part 5311 and the moving rod 5320.

The configuration of the bearing 5330 may have characteristics corresponding to the configuration of the bearing 330 shown in FIGS. 1 to 12, etc. As an example, the bearing 5330 may include a plurality of rolling elements 5331.

The bearing 5330 may include various configurations that allow the rotating part 5311 to efficiently rotate around the moving rod 5320.

In addition, as described above, the friction between the rotating part 5311 and the moving rod 5320 may be reduced by various substances such as fluid such as expansion oil. The friction force between the rotating part 5311 and the fixed ball 5312 can also be reduced by various substances such as fluid such as expansion oil.

Unlike what has been described above, in the apparatus for manufacturing a heat exchanger according to an embodiment of the present disclosure, the expansion body may not rotate around the moving rod. As an example, the moving rod may be provided to be rotatable with respect to the mandrel holder 33 shown in FIG. 3 or a separate support structure (not shown) connected to the mandrel holder 33. Here, the expansion body may include a plurality of groove forming protrusions obliquely extending in one direction (Z), and when the expansion body is inserted into the tube base material, the plurality of groove forming protrusions may be pressed by the inner surface of the tube base material. The expansion body and the moving rod may be provided to be rotatable about a rotation axis extending in one direction (Z). Even in this case, the expanded tube body may move linearly and rotate at the same time, and the plurality of groove forming protrusions may form a plurality of grooves extending obliquely in one direction (Z) on the inner surface of the tube base material.

Figure 22 is a diagram illustrating an example of a process of arranging a plurality of heat exchange fins to penetrate a tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 23 is an enlarged cross-sectional view for explaining the appearance of the tube base material and a plurality of heat exchange fins before expansion in explaining the manufacturing method of the heat exchanger according to an embodiment of the present disclosure. Figure 24 is a diagram showing an example of a process of linearly moving the expansion mandrel toward the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 25 is a diagram showing an example of the process of expanding the tube base material in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure. Figure 26 is a diagram showing an example of a process of connecting a plurality of refrigerant tubes after expansion in the method of manufacturing a heat exchanger according to an embodiment of the present disclosure.

With reference to FIGS. 22 to 26, a method of manufacturing a heat exchanger according to an embodiment of the present disclosure will be described.

22 to 26 illustrate a method of manufacturing a heat exchanger according to an embodiment of the present disclosure based on the expansion mandrel 300 according to the embodiment of FIGS. 1 to 12, but the spirit of the present disclosure is not limited thereto. No. The manufacturing method of the heat exchanger described in FIGS. 22 to 26 involves manufacturing a heat exchanger using the expansion mandrels (300, 2300-1, 2300-2, 3300, 4300, and 5300) according to various embodiments of FIGS. 1 to 21. The same can be applied to the process.

In the step shown in FIG. 22, a plurality of heat exchange fins 120 may be arranged to penetrate the tube base material 110a. A plurality of heat exchange fins 120 may be stacked along the base material linear portion 111a of the tube base material 110a.

The installation holes 122 and fin collars 123 of the plurality of heat exchange fins 120 may be formed in various ways. As an example, the installation hole 122 and the pin collar 123 may be formed through a burring process. To prevent the end of the fin collar 123 from being inserted between the installation holes 122 of adjacent heat exchange fins 120 when the heat exchange fins 120 are stacked, the end of the fin collar 123 is subjected to press processing after the burring process. It can also be bent by

As shown in FIG. 23, the tube base material 110a before the expansion process may not be combined with the heat exchange fin 120. Even when the tube base material 110a before the expansion process is arranged to penetrate the installation hole 122, it may not contact all or part of the pin collar 123.

In the step shown in FIG. 24, the tube base material 110a and the plurality of heat exchange fins 120 disposed to penetrate the tube base material 110a are positioned for the tube expansion process (for example, the supporter 31 in FIG. 3). It can be located in . The tube base material 110a and the plurality of heat exchange fins 120 disposed to penetrate the tube base material 110a may be arranged in parallel with the expansion pipe mandrel 300. In detail, the insertion end (113a) of the tube base material (110a) may be aligned to face the expansion mandrel (300).

Thereafter, the expansion mandrel 300 may be moved linearly toward the tube base material 110a. In detail, the expansion mandrel 300 may be moved in the direction L1 in which it is inserted into the tube base material 110a.

The expansion mandrel 300 may be inserted into the tube base material 110a through the insertion end 113a.

In the step shown in FIG. 25, the expansion mandrel 300 may be moved in the direction L1 in which it is inserted into the tube base material 110a, and thus the tube base material 110a may be expanded.

The expansion mandrel 300 can be moved in the L1 direction along the base material linear portion 111a, and can be moved to one end of the base material linear portion 111a on the base material bending portion 112a side to expand the tube base material 110a. .

As the tube base material 110a is expanded, the outer peripheral surface of the tube base material 110a may be pressed into contact with the pin collar 123. That is, the tube base material 110a may be coupled to a plurality of heat exchange fins 120.

The expansion body 310 of the expansion mandrel 300 may rotate relative to the moving rod 320 while moving linearly within the tube base material 110a. When the linearly moving expansion mandrel 300 is inserted into the tube base material 110a to expand the tube base material 110a, a plurality of groove forming protrusions 313 formed on the outer surface of the expansion mandrel 300 may rotate. Accordingly, a plurality of grooves 113 may be formed on the inner surface of the tube base material 110a.

As shown in FIG. 26, when the expansion process of the tube base material 110a is completed, the refrigerant tube 110 and the plurality of heat exchange fins 120 may be coupled to each other.

Here, some of the plurality of linear parts 111 may be connected to each other by the bending part 112, but other parts of the plurality of linear parts 111 may not be connected to each other.

In the step shown in FIG. 26 , a pair of linear parts 111 adjacent to each other among the portions of the plurality of linear parts 111 that are not connected to each other may be connected by a connecting tube 140.

The connection tube 140 may have a bent shape. The connection tube 140 may include a first connection end 141 and a second connection end 142, and may be bent and extended from the first connection end 141 toward the second connection end 142. .

The first connection end 141 may be connected to one end of one of the pair of linear parts 111 on the side opposite to the bending part 112. The second connection end 142 may be connected to one end of the pair of linear parts 111 on a side opposite to the other bending part 112.

The connecting tube 140 and the linear portion 111 may be fixed to each other in various ways, such as fixing through welding or fixing through a fixing member (not shown) such as a fixing clip or iron wire.

In this way, the connecting tube 140 can connect adjacent refrigerant tubes 110 to form a refrigerant flow path that extends integrally.

Through each step described in FIGS. 22 to 26, the heat exchanger 100 according to an embodiment of the present disclosure can be manufactured.

The method of manufacturing a heat exchanger described above with reference to FIGS. 22 to 26 is only an example of a method of manufacturing a heat exchanger using a heat exchanger manufacturing apparatus according to the spirit of the present disclosure, and the spirit of the present disclosure is thereto. Not limited.

In the above, specific embodiments are shown and described. However, it is not limited to the above-described embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea of the invention as set forth in the claims below. .

Claims

In the manufacturing apparatus of a heat exchanger including a refrigerant tube,

A movable rod provided to be linearly movable along a first direction; and

An expansion tube body connected to the moving rod and provided to be linearly movable along the first direction, wherein when the expansion body is moved by the moving rod and inserted into the tube base material of the refrigerant tube, the tube It includes; an expansion body provided to be insertable into the tube base material so that the base material is expanded outward,

The expansion body is,

It is formed to extend along an inclined direction in the first direction on the outer surface of the expansion tube body, and when the expansion body is moved by the moving rod and inserted into the tube base material, a plurality of grooves are formed on the inner surface of the tube base material. ) Manufacturing apparatus of a heat exchanger including a plurality of groove forming protrusions provided to form a.
According to claim 1,

The expansion tube body is provided to be rotatable about the longitudinal axis of the moving rod.
According to paragraph 1,

The expansion body is provided to rotate in a first rotation direction when inserted into the tube base material,

Each of the plurality of groove forming protrusions includes a first end in a direction in which it is inserted into the tube base material and a second end opposite to the first end,

Each of the plurality of groove forming protrusions extends obliquely from the second end to the first end in the first rotation direction with respect to the first direction.
According to paragraph 1,

The movable rod extends along the first direction, and at least a portion is disposed inside the expansion body,

The expansion tube body is provided to be rotatable around the moving rod.
According to paragraph 4,

A heat exchanger manufacturing apparatus further comprising a bearing provided between the expanded tube body and the moving rod.
According to clause 5,

The bearing includes a plurality of rolling elements disposed between the inner peripheral surface of the expansion body and the outer peripheral surface of the moving rod,

A heat exchanger manufacturing apparatus in which the plurality of rolling elements are arranged along a circumferential direction of the expanded tube body.
According to clause 5,

The bearing includes a plurality of bearings,

A heat exchanger manufacturing apparatus in which the plurality of bearings are arranged along the longitudinal direction of the expanded tube body.
According to paragraph 1,

The expansion body includes a tapered portion that narrows in a direction in which it is inserted into the tube base material,

The plurality of groove forming protrusions are arranged on the outer surface of the tapered portion.
According to clause 8,

The expansion body further includes a cylinder portion extending along the first direction and having a hollow cylindrical shape,

The tapered portion extends from a first end in the direction in which the cylinder portion is inserted into the tube base material,

A heat exchanger manufacturing apparatus wherein at least a portion of the plurality of groove forming protrusions is disposed on an outer surface of the cylinder portion.
According to paragraph 1,

The expansion body is,

A first end in the direction inserted into the tube base material,

a second end opposite to said first end;

A first hole formed in the first end,

It includes a second hole formed in the second end,

The movable rod is a heat exchanger manufacturing apparatus extending through the first hole and the second hole.
According to clause 10,

The movable rod further includes a head portion in contact with an outside of the first end of the expansion body,

The head portion is formed so that a width in a direction perpendicular to the first direction is wider than a width of the first hole in a direction perpendicular to the first direction.
According to clause 11,

The head part includes a first part adjacent to the expanded tube body and a second part located at one end of the first part in the direction in which it is inserted into the tube base material,

The first part is formed so that its width in a direction perpendicular to the first direction increases as it moves from the expanded tube body to the second part.
According to clause 10,

The movable rod further includes a pressing portion in contact with an outside of the second end of the expansion body,

The pressing unit is provided to press the second end in the first direction when the movable rod moves in the first direction,

The pressurizing portion is formed to have a width in a direction perpendicular to the first direction that is wider than a width of the second hole in a direction perpendicular to the first direction.
According to paragraph 1,

The plurality of groove forming protrusions are arranged at uniform intervals along the outer circumferential direction of the expanded pipe body.
According to paragraph 1,

The expansion body is,

A rotating part provided to rotate around the moving rod,

Further comprising a fixed ball fixed to the moving rod,

The fixing ball is located at one end of the rotating part in the direction in which it is inserted into the tube base material,

The plurality of groove forming protrusions are provided on the outer surface of the rotating part.