KR20210112150A - Plate heat exchanger - Google Patents

Abstract

Disclosed is a plate heat exchanger. The plate heat exchanger of the present disclosure comprises: a first plate which has a first heat transfer surface through which a first fluid flows, and has a first hole through which the first fluid is introduced or discharged; a second plate which has a second heat transfer surface through which a second fluid flows, and has a second hole through which the second fluid is introduced or discharged, wherein the second plate is stacked with the first plate; and a guide which is positioned between an end of the first heat transfer surface adjacent to a first discharge hole through which the first fluid of the first hole is discharged and the first discharge hole. An objective of the present invention is to provide the plate heat exchanger capable of preventing freezing.

Description

Plate heat exchanger {PLATE HEAT EXCHANGER}

The present disclosure relates to a plate heat exchanger. In particular, the present disclosure relates to a plate heat exchanger capable of preventing freeze-up by eliminating the stagnant flow of water adjacent to a discharge hole.

In general, an air conditioner refers to a device that cools and cools a room through a process of compression, condensation, expansion, and evaporation of a refrigerant. When heating the room, the indoor heat exchanger provided in the indoor unit functions as a condenser through which high-temperature and high-pressure refrigerant passes, and the outdoor heat exchanger provided in the outdoor unit functions as an evaporator through which the low-temperature and low-pressure refrigerant passes. Conversely, when cooling the room, the indoor heat exchanger functions as an evaporator, and the outdoor heat exchanger functions as a condenser.

Such a heat exchanger is provided as a plate heat exchanger, so that heat transfer between different fluids (ie, water and a refrigerant) can be effectively achieved. For example, Korean Patent Laid-Open Publication No. 10-2008-0006122 discloses a configuration in which heat exchange can be efficiently performed in a flow path formed between a plurality of heat transfer plates.

In particular, in the case of cooling high-temperature water using a low-temperature refrigerant, the freezing of water may be accelerated as the flow of water is stagnated adjacent to the discharge hole, and there is a need to develop a technology capable of solving this problem.

Republic of Korea Patent Publication 10-2008-0006122 (2008.01.16.)

SUMMARY OF THE INVENTION The present disclosure aims to solve the above and other problems.

Another object may be to provide a plate heat exchanger capable of preventing freeze-up by eliminating the stagnant flow of water adjacent to the discharge hole.

Another object may be to provide a plate heat exchanger capable of simplifying the manufacturing process by forming a guide for resolving the flow stagnation of water while implementing a wave shape on the plate.

According to an aspect of the present disclosure for achieving the above object, the first plate having a first heat transfer surface through which a first fluid flows, and a first hole through which the first fluid is introduced or discharged is formed; A second plate having a second heat transfer surface through which a second fluid flows and having a second hole through which the second fluid is introduced or discharged, comprising: a second plate stacked with the first plate; In addition, there is provided a plate heat exchanger including a guide positioned between the first discharge hole and an end of the first heat transfer surface adjacent to the first discharge hole through which the first fluid of the first hole is discharged.

The effect of the air conditioner according to the present disclosure will be described as follows.

According to at least one of the embodiments of the present disclosure, it is possible to provide a plate heat exchanger capable of preventing freezing by eliminating the stagnant flow of water adjacent to the discharge hole.

According to at least one of the embodiments of the present disclosure, it is possible to provide a plate-type heat exchanger capable of simplifying the manufacturing process by forming a guide for resolving the flow stagnation of water while implementing a wave shape on the plate.

Further scope of applicability of the present disclosure will become apparent from the following detailed description. However, it should be understood that the detailed description and specific embodiments such as preferred embodiments of the present disclosure are given by way of example only, since various changes and modifications within the spirit and scope of the present disclosure may be clearly understood by those skilled in the art.

1 is a perspective view of a plate heat exchanger according to an embodiment of the present disclosure;
2 is a front view of a first plate according to an embodiment of the present disclosure.
3 is a front view of a second plate according to an embodiment of the present disclosure.
4 is an exploded perspective view of a first plate and a second plate according to an embodiment of the present disclosure;
5 to 8 are views illustrating various examples of a structure capable of resolving a flow stagnation of water adjacent to a discharge hole according to an embodiment of the present disclosure.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present disclosure , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following description, although embodiments are described with reference to specific drawings, if necessary, reference numbers not appearing in the specific drawings may be referred to, and reference numbers not appearing in the specific drawings are referred to in other drawings (in the other drawings). figures) are used where the above reference numbers appear.

Referring to FIG. 1 , the plate heat exchanger 1 includes a plurality of plates 10 and 20 stacked on each other.

A direction in which the plurality of plates 10 and 20 are stacked on each other in the plate heat exchanger 1 may be referred to as a front-rear direction FR. Also, the plurality of plates 10 and 20 may extend long in the vertical direction UD. The left-right direction LR may be a direction perpendicular to the front-rear direction FR and the vertical direction UD. On the other hand, for convenience of description, the length in the vertical direction (UD) of the plate heat exchanger (1) is illustrated and described as being longer than the length in the left and right direction (LR), but the vertical direction of the plate heat exchanger (1) It is also possible that the length in (UD) is approximately equal to or shorter than the length in the left-right direction (LR). In addition, although it is shown that the plurality of plates 10 and 20 of the plate heat exchanger 1 consists of three, the number of the plurality of plates 10 and 20 is not limited.

The first end plate 50 may cover the front of the plate positioned at the front among the plurality of plates 10 and 20 . In this case, a flow path through which the fluid flows may be formed between the first end plate 50 and the frontmost plate. The second end plate 30 may cover the rear of the plate positioned at the rearmost among the plurality of plates 10 and 20 . In this case, a flow path through which the fluid flows may be formed between the second end plate 30 and the rearmost plate. In addition, the flow of the fluid backward from the second end plate 30 may be blocked.

The front cover 60 may be coupled to the first end plate 50 to cover the front of the first end plate 50 . The rear cover 40 may be coupled to the second end plate 30 to cover the rear of the second end plate 50 .

A hole through which the first fluid W and the second fluid R are introduced or discharged may be formed in each of the front cover 60 , the first end plate 50 , and the plurality of plates 10 and 20 .

For example, the first fluid W is introduced through the inlet hole 61 of the front cover 60 , the inlet hole 51 of the first end plate 50 and the plurality of plates 10 and 20 . A first flow path connecting the inlet holes 11 and 21 of the In addition, a portion of the first fluid W flowing through the first flow path may flow downward along a heat transfer surface (unsigned) of some of the plurality of plates 10 and 20 . In addition, the first fluid W flowing through the first flow path and/or the heat transfer surface may be combined in the second flow path and discharged to the outside through the discharge hole 62 of the front cover 60 . Here, the second flow path may connect the discharge holes 12 and 22 of the plurality of plates 10 and 20 and the discharge holes 52 of the first end plate 50 . Meanwhile, the first fluid W may be water.

For example, the second fluid R is introduced through the inlet hole 63 of the front cover 60 , the inlet hole 53 of the first end plate 50 and the plurality of plates 10 and 20 . A third flow path connecting the inlet holes 13 and 23 of the In addition, a portion of the second fluid R flowing through the third flow path may flow upward along a heat transfer surface (unsigned) of some of the plurality of plates 10 and 20 . In addition, the second fluid R flowing through the third flow path and/or the heat transfer surface may be combined in the fourth flow path and discharged to the outside through the discharge hole 64 of the front cover 60 . Here, the fourth flow path may connect the discharge holes 14 and 24 of the plurality of plates 10 and 20 and the first discharge hole 54 of the first end plate 50 . Meanwhile, the second fluid R may be a refrigerant. For example, the second fluid R may be R410A or R32.

For example, the first fluid W may be introduced into the inlet hole 61 of the front cover 60 at a relatively high temperature and may pass through the inside of the plate heat exchanger 1 . At this time, the second fluid R is introduced into the inlet hole 63 of the front cover 60 in a relatively low temperature state, passes through the inside of the plate heat exchanger 1, and heat exchanges with the first fluid W can do. Accordingly, the first fluid W may be cooled, and the second fluid R may be heated.

2 and 4 , the plurality of plates 10 and 20 may include a first plate 10 and a second plate 20 that are stacked on each other in the front-rear direction FR. In this case, the first plate 10 may include a first heat transfer surface 110 through which the first fluid W flows.

The first plate 10 may have first holes 11 and 12 through which the first fluid W flowing through the first heat transfer surface 110 is introduced or discharged. For example, the first fluid W introduced into the first inflow hole 11 of the first holes 11 and 12 flows along the first heat transfer surface 110, and the first hole 11 and 12 may be discharged through the first discharge hole 12 of the Meanwhile, the second fluid R may pass through the holes 13 and 14 of the first plate 10 without being introduced into the first heat transfer surface 110 of the first plate 10 .

The first heat transfer surface 110 of the first plate 10 may have a wave shape in which ridges 111 and grooves 112 are alternately formed. For example, the wave of the first heat transfer surface 110 may be formed in an inverted-V shape from the front side. Such a shape of the first heat transfer surface 110 may be referred to as a chevron shape. Accordingly, the heat transfer area of the first fluid W flowing through the first heat transfer surface 110 may be increased.

3 and 4 , the second plate 20 may include a second heat transfer surface 210 through which the second fluid R flows.

The second plate 20 may have second holes 23 and 24 through which the second fluid R flowing through the second heat transfer surface 210 is introduced or discharged. For example, the second fluid R introduced into the second inlet hole 23 of the second hole 23 and 24 flows along the second heat transfer surface 210 and the second hole 23 and 24 . may be discharged through the second discharge hole 24 of the Meanwhile, the first fluid W may pass through the holes 21 and 22 of the second plate 20 without being introduced into the second heat transfer surface 210 of the second plate 20 .

The second heat transfer surface 210 of the second plate 20 may have a wave shape in which a ridge 211 and a groove 212 are alternately formed. For example, the wave of the second heat transfer surface 210 may be formed in a V shape on the front side. The shape of the second heat transfer surface 210 may be referred to as a chevron shape. Accordingly, the heat transfer area of the second fluid R flowing through the second heat transfer surface 210 may be increased.

For example, the first plate 10 and the second plate 20 may be made of a metal material having excellent thermal conductivity and excellent pressure resistance against pressure. For example, the first plate 10 and the second plate 20 may include a stainless material.

Referring to FIG. 5 , the floor 111 may be formed while being pressed by the first plate 10 . In this case, a plurality of valleys 112 may be formed between the plurality of ridges 111 . In addition, the flat plate portion 120 of the first plate 10 may be formed to be stepped on the floor 111 .

A first discharge hole 12 is formed on one side of the flat plate part 120 , and an end of the first heat transfer surface 110 may be positioned along the circumference of the flat plate part 120 . That is, the first fluid W flowing along the crest 111 and the valley 112 of the first heat transfer surface 110 passes through the flat plate part 120 from the end of the valley 112 to the first discharge hole 12 . ) can be discharged through

The flat plate part 120 may include a first area 121a, a second area 121b, and a third area 121c. A first discharge hole 12 may be formed in the first region 121a. The second region 121b may be adjacent to the first region 121a and may be located between the center C of the first discharge hole 12 and the valley 112 . That is, the second region 121b may be a region adjacent to the valley 112 . The third region 121c may be a region excluding the first region 121a and the second region 121b of the flat plate part 120 . That is, the third region 121c may be a region separated from the valley 122 . For example, the first discharge hole 12 is a circular hole, and the second area 121b and the third area 121c have a sectoral shape based on the center C of the first discharge hole 12 . It may have a shape excluding the first area 121a in which the discharge hole 12 is located. In this case, a portion of the third region 121c may be adjacent to the lower side Ed of the first plate 10 .

On the other hand, the first discharge hole 12 is the second inlet hole 23 of the second plate 20 through which the second fluid R flows and the first plate 20 through which the second fluid R passes. It may be located adjacent to the hole 13 (see FIG. 4 ). And, when the relatively high temperature first fluid (W) passes through the plate heat exchanger (1) and is cooled by the relatively low temperature second fluid (R), the first fluid (W) passing through the first discharge hole (12) One fluid (W, that is, a fluid cooled to a certain level or more) may be frozen by the second fluid (R, that is, a low-temperature fluid) passing through the second inlet hole 23 or the hole 13 . In this case, when the flow of the first fluid W in the first discharge hole 12 is stagnant, the above-mentioned freezing is accelerated and the plate heat exchanger 1 may be frozen, so it is necessary to solve this.

The guide 130 may be positioned between the end of the first heat transfer surface 110 adjacent to the first discharge hole 12 and the first discharge hole 12 . The guide 130 may protrude from the flat plate part 120 between the distal end of the valley 112 and the first discharge hole 12 . For example, the guide 130 may be formed together with the floor 111 while being pressed by the first plate 10 . That is, since the first plate 10 is provided with the wave-shaped first heat transfer surface 110 and the guide 130 is formed at the same time, the manufacturing process can be simplified.

The guide 130 may be disposed to be curved along the circumference of the first discharge hole 12 . The guide 130 may extend along the circumference of the first discharge hole 12 so that at least a portion thereof faces the valley 112 . One end 131 of the guide 130 may be located in the third region 121c. The other end 132 of the guide 130 may be bent in the radial direction of the first discharge hole 12 to be adjacent to the valley 112 . Accordingly, it is possible to prevent the first fluid (W) passing through the valley 112 from flowing in a direction opposite to the direction extending from the other end 132 to the one end 131 of the guide 130 .

Accordingly, the first fluid W that has passed through the valley 112 may flow R1 along the guide 130 to the third region 121c. That is, facing the end of the first heat transfer surface 110 or the valley 112 with the first discharge hole 12 interposed therebetween, the third region 121c in which flow stagnation of the first fluid W may be caused. As the first fluid (W) is smoothly supplied, the flow stagnation of the first fluid (W) can be resolved. As a result, freezing of the first fluid W is prevented, thereby preventing freezing of the plate heat exchanger 1 .

Referring to FIG. 6 , the guide 130 ′ may extend along the circumference of the first discharge hole 12 so that at least a portion thereof may face the valley 112 . One end 131' of the guide 130' may be located in the third region 121c. The other end 132 ′ of the guide 130 ′ may be positioned in the third region 121c while being symmetrical with the one end 131 ′ of the guide 130 ′ with respect to the first discharge hole 12 . For example, the guide 130 may be formed in an arc (arc) shape as a whole.

Accordingly, the first fluid W that has passed through the valley 112 may flow left or right along the guide 130 ′ and flow R2 to the third region 121c. That is, facing the end of the first heat transfer surface 110 or the valley 112 with the first discharge hole 12 interposed therebetween, the third region 121c in which flow stagnation of the first fluid W may be caused. As the first fluid (W) is smoothly supplied, the flow stagnation of the first fluid (W) can be resolved. As a result, freezing of the first fluid W is prevented, thereby preventing freezing of the plate heat exchanger 1 .

Referring to FIG. 7 , the guide 130 ″ may include a plurality of protrusions 130 ″. Each of the plurality of protrusions 130 ″ may protrude from the flat plate 120 to face each of the plurality of valleys 112 adjacent thereto. In addition, the plurality of protrusions 130 ″ may be spaced apart from each other in the circumferential direction of the first discharge hole 12 . That is, a narrow gap through which the first fluid W can pass may be formed between the plurality of protrusions 130 ″.

Accordingly, the first fluid (W) passing through the valley 112 passes between the plurality of protrusions 130 ″, and the flow may be accelerated. That is, it is possible to prevent the first fluid W from having a flow stagnation of the first fluid W having a relatively high flow rate adjacent to the first discharge hole 12 . As a result, freezing of the first fluid W is prevented, thereby preventing freezing of the plate heat exchanger 1 .

Referring to FIG. 8 , the width of the valley 112 ′ located within a predetermined distance from the center C of the first discharge hole 12 may become narrower as it approaches the end of the valley 112 ′. For example, as a valley 112' formed between adjacent floors 111', the width of the valley 112' located at a predetermined distance from the center C of the discharge hole 12 is g1, but The width of the end of (112') may be g2 less than g1. Here, the width of the valley 112 ′ may gradually decrease from g1 to g2.

Accordingly, the flow of the first fluid W passing through the bone 112 ′ may be accelerated as it approaches the end of the bone 112 ′. That is, it is possible to prevent the first fluid W from having a flow stagnation of the first fluid W having a relatively high flow rate adjacent to the first discharge hole 12 . As a result, freezing of the first fluid W is prevented, thereby preventing freezing of the plate heat exchanger 1 .

On the other hand, in this case, of course, the above-described guides 130; 130'; 130'' may be additionally applied.

According to an aspect of the present disclosure, there is provided a display device comprising: a first plate having a first heat transfer surface through which a first fluid flows, and a first hole through which the first fluid is introduced or discharged; A second plate having a second heat transfer surface through which a second fluid flows and having a second hole through which the second fluid is introduced or discharged, comprising: a second plate stacked with the first plate; In addition, there is provided a plate heat exchanger including a guide positioned between the first discharge hole and an end of the first heat transfer surface adjacent to the first discharge hole through which the first fluid of the first hole is discharged.

Further, according to another aspect of the present disclosure, the first heat transfer surface is formed in a wave shape in which ridges and grooves are alternately formed, and the guide includes an end of the valley and the first discharge hole. can be located between

Further, according to another aspect of the present disclosure, the first plate further includes a flat portion in which the first discharge hole is formed on one side while being stepped on the floor, and the guide may protrude from the flat portion. can

According to another aspect of the present disclosure, the flat plate includes: a first area in which the first discharge hole is formed; a second region adjacent to the first region and positioned between the center of the first discharge hole and the valley; In addition, it may further include a third area remaining except for the first area and the second area, and the guide may be disposed to be curved along a circumference of the first discharge hole.

Also, according to another aspect of the present disclosure, the guide may extend along a circumference of the first discharge hole, at least a part of it may face the valley, and one end may be located in the third region.

According to another aspect of the present disclosure, the other end of the guide may be bent in a radial direction of the first discharge hole to be adjacent to the valley.

According to another aspect of the present disclosure, the other end of the guide may be positioned in the third region while being symmetrical with one end of the guide with respect to the first discharge hole.

According to another aspect of the present disclosure, the guide may further include: a plurality of protrusions each protruding from the flat plate to face the valley, and spaced apart from each other in the circumferential direction of the first discharge hole. .

Also, according to another aspect of the present disclosure, the width of the bone may be narrower as it approaches the end of the bone.

According to another aspect of the present disclosure, the first fluid may be water, and the second fluid may be a refrigerant.

Any or other embodiments of the present disclosure described above are not mutually exclusive or distinct. Certain embodiments or other embodiments of the invention described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the invention described above may be combined or combined with each other in configuration or function).

For example, it means that configuration A described in a specific embodiment and/or drawings may be combined with configuration B described in other embodiments and/or drawings. That is, even if the combination between the configurations is not directly described, it means that the combination is possible except for the case where it is explained that the combination is impossible (For example, a configuration "A" described in one embodiment of the invention and the drawings. and a configuration "B" described in another embodiment of the invention and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible).

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention (although embodiments have been described with reference to a number of illustrative embodiments) thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art).

Claims (10)

a first plate having a first heat transfer surface through which a first fluid flows and having a first hole through which the first fluid is introduced or discharged;
A second plate having a second heat transfer surface through which a second fluid flows and having a second hole through which the second fluid is introduced or discharged, comprising: a second plate stacked with the first plate; and,
and a guide positioned between an end of the first heat transfer surface adjacent to the first discharge hole through which the first fluid of the first hole is discharged and the first discharge hole. According to claim 1,
The first heat transfer surface is formed in a wave shape in which ridges and grooves are alternately formed,
The guide is a plate heat exchanger located between the end of the valley and the first discharge hole. 3. The method of claim 2,
The first plate is:
It further comprises a flat portion formed in a step on the floor, the first discharge hole is formed on one side,
The guide is a plate heat exchanger protruding from the flat plate. 4. The method of claim 3,
The flat panel includes:
a first region in which the first discharge hole is formed;
a second region adjacent to the first region and positioned between the center of the first discharge hole and the valley; and,
and a third area remaining except for the first area and the second area,
The guide is a plate heat exchanger that is disposed to be curved along a circumference of the first discharge hole. 5. The method of claim 4,
The guide is
A plate-type heat exchanger extending along a circumference of the first discharge hole, at least a portion of which faces the valley, and one end of which is located in the third region. 6. The method of claim 5,
The other end of the guide is
A plate-type heat exchanger that is bent in the radial direction of the first discharge hole and is adjacent to the valley. 6. The method of claim 5,
The other end of the guide is
A plate-type heat exchanger positioned in the third area while being symmetrical with one end of the guide with respect to the first discharge hole. 5. The method of claim 4,
The guide is:
The plate heat exchanger further comprising a plurality of projections each protruding from the flat plate to face the valley, and spaced apart from each other in a circumferential direction of the first discharge hole. 3. The method of claim 2,
The width of the trough becomes narrower as it approaches the end of the trough. According to claim 1,
The first fluid is water,
The second fluid is a refrigerant plate heat exchanger.

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