KR20150119982A - Heat exchanger - Google Patents

Abstract

Provided is a heat exchanger comprising: multiple tubes which are separately arranged in a horizontal direction; and heat radiation fins which stand in a vertical direction, as a lamination direction of the tubes, are separately arranged in the longitudinal direction of the tubes, and are combined with the tubes. The heat radiation fins comprise: a plate body in a plate shape, which is separately formed in a horizontal direction in response to the tubes and is opened to one side to from multiple tube insertion holes inserted with the tubes; and a bending unit which is connected to the protruding uppermost and lowermost ends of the plate body and connect adjacent plate bodies by being bent from the plate body. Thus, heating performance can be optimized after defrosting and the defrosting mode time can be minimized as condensation water is easily drained to the lower side through drain fins in a defrosting mode. Moreover, the reliability and durability of the product can be improved as the bending unit is extended from the end of fins without a separate side plate.

Description

Heat exchanger

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger applied to a cooling / heating heat pump system.

Generally, in a heat pump for an air-conditioning system, an outdoor unit serves to condense a high-temperature refrigerant when it is used for cooling, and evaporates a low temperature when it is used as a heating system.

Here, the heat exchanger used in the outdoor unit in the heat pump for the cooling / heating system is used by inserting a plate pin into a circular pipe made of copper. In this case, since the pin and the tube are closely contacted by mechanical compression, The overall performance of the heat exchanger is low, and the weight is heavy.

In order to solve the problem of reducing the heat transfer efficiency described above, a heat exchanger having a structure in which an aluminum type multi-channel tube is used and an aluminum corrugated fin is used to braze a fin and a tube is developed and applied. A heat exchanger tube and a heat exchanger of Korean Patent Laid-Open No. 10-2005-0067168 have been disclosed.

On the other hand, in the heat pump system, the outdoor unit is used as an evaporator in the heating mode. When the outdoor air and the refrigerant exchange heat, if the air temperature is below 0 ° C, the water vapor in the air is frosted and attached to the fins. However, since such frost hinders air flow and hinders the indoor heating performance, a defrost mode is performed to remove it. Here, the defrosting mode refers to the removal of the frost attached to the fin of the heat exchanger through the high-temperature refrigerant discharged from the compressor as a cooling cycle.

However, when the frost of the heat exchanger is removed through the defrost mode as described above, the conventional corrugated fin and tube type (PF type) heat exchanger can not smoothly discharge the condensed water generated during defrosting, The condensed water which has not been discharged in this way is adhered to the fin in the form of frost in the heating mode, which has a problem of deteriorating the heating performance. In addition, since the conventional fin-tube type heat exchanger does not have a separate reinforcing member at the end of the pin, not only the reliability is lowered but also the pin is damaged.

An object of the present invention is to provide a heat exchanger capable of rapidly discharging condensed water to prevent deterioration of performance and improving reliability and durability of a product even without a separate side plate.

The present invention relates to a method of manufacturing a tube, comprising: a plurality of tubes which are stacked one on the other along the longitudinal direction; a plurality of tubes vertically arranged in the stacking direction of the tubes and arranged laterally spaced apart from each other along the longitudinal direction of the tubes, The heat radiating fins may include a plate body having a plurality of tube insertion openings formed in a plate shape and spaced apart from each other in a longitudinal direction corresponding to the tubes and opened in one direction to insert the tubes, And a bending part integrally connected to the uppermost and lowermost ends of the protruding plate body and bent from the plate body to connect adjacent plate bodies.

Here, the plate body may include a plurality of louvers formed at an angle between the tube insertion openings.

Further, the louvers are preferably inclined in one direction along the direction in which the air is introduced. Further, the louver angle and the louver length on the air outlet side are longer than the louver angle and louver length on the air inlet side, And it is preferable that it is formed larger. Further, it is preferable that the louver angle and the louver length of the louvers are gradually increased from the air inlet side to the air outlet side, or they are divided into a plurality of steps and formed to be large in stages.

In addition, the tube insertion port may be formed to be open to the front surface where air is introduced.

The bent portion may further include an assembling portion for assembling the adjacent portions. At this time, the assembling unit may include a fitting groove formed at an end of the bending portion, and a fitting protrusion formed to protrude from the adjacent bending portion and inserted into the fitting groove.

The plate body may further include a contact support portion extending along the side surface of the tube from the tube insertion port and contacting the tube.

Here, it is preferable that the contact support portion increases in contact area with the tube from the air inlet side toward the air outlet side. Further, the contact support portion may include a first contact portion provided at a front portion of the air inlet side, a second contact portion formed integrally with the first contact portion and provided at a rear portion of the air outlet side, And a second contact portion having a second contact portion. Here, the first contact portion and the second contact portion may each have a rectangular shape in plan view. It is preferable that the contact area of the first contact portion gradually increases from the front toward the rear of the second contact portion.

In addition, the first contact portion may have a triangular shape in plan view.

The plate body may be formed such that an end of the front surface of the plate body is protruded from the front surface of the tube after the tube is inserted.

The plate body is disposed on the front surface of the plate body into which the air flows and is spaced apart in the longitudinal direction between the tubes. One side of the plate body is connected to the lower surface of the plate body to drain the condensed water downward. And a drain pin coupled to the front surface and having a downwardly inclined lower surface. Preferably, the drain pin is integrally formed with the plate body and is partially cut away from the upper end of the protruding end of the plate body, and the upper cut end is bent downwardly.

It is preferable that the bent portion is formed at a right angle along the longitudinal direction of the tube.

The width of the bent portion may be smaller than the width of the plate body.

In addition, the plate bodies may be integrally brazed by the adjacent bends.

The heat exchanger according to the present invention provides the following effects.

First, the condensate can be easily drained downward in the defrost mode through the drain pin, so that the heating performance after defrosting can be optimized and the defrost mode time can be minimized. .

Second, the reliability and durability of the product can be improved through the bent portion extending from the end portion of the pin without a separate side plate.

Third, the heat exchange effect can be improved through the louvers that can optimize the air flow.

Fourth, it is possible to maintain a constant gap between the fins through the bent portion and the assembly portion, to prevent sagging, and to improve the reliability by improving the fusion-weldability in brazing.

Fifth, it is possible to improve the bonding force between the tube and the pin through the contact support, and improve the reliability and durability by improving the integration during brazing.

FIG. 1 is a block diagram showing the configuration of an air conditioner heat pump system to which a heat exchanger according to an embodiment of the present invention is applied.
Fig. 2 is a front view showing the heat exchanger of Fig. 1;
3 is a cross-sectional view taken along line III-III of the heat exchanger of FIG.
Fig. 4 is a perspective view showing the radiating fin of Fig. 2;
Figure 5 is a cross-sectional view of a louver formed in the plate body of Figure 4;
FIG. 6 is a perspective view illustrating that the bent portions are assembled by the assembly portion in the radiating fin of FIG. 4. FIG.
FIG. 7 is a front sectional view showing the radiating fins assembled by the assembly of FIG. 6;
FIG. 8 is a perspective view showing a contact support portion in contact with the tube in the radiating fin of FIG. 4; FIG.
Fig. 9 is a perspective view showing another embodiment of the contact support of Fig. 8;
10 is a perspective view showing a drain pin provided in front of the plate body in the radiating fin of FIG.
11 is a front view of the radiating fin provided with the drain pin of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The heat exchanger 500 (see FIG. 2) according to the embodiment of the present invention can be applied to the outdoor heat exchanger 20 of the heat pump system for cooling and heating shown in FIG. 1. Before examining the heat exchanger, The pump system will be described.

First, the air conditioner for cooling and dehumidifying is composed of a compressor, a condenser, an evaporator, and an expansion valve. The outdoor heat exchanger 20 serves to lower the room temperature in summer. It serves to condense the refrigerant.

In the heating mode, the outdoor heat exchanger 20 is used as an evaporator to heat-exchange the low-temperature refrigerant from the expansion valve 30 with outdoor air, thereby evaporating the refrigerant It plays a role. In the heating mode, when the air (outdoor air) is cooled down to 0 ° C or less during heat exchange with the refrigerant at a temperature of 0 ° C or lower, the water vapor in the air adheres to the surface of the fin of the outdoor heat exchanger 20 in a frost form. The air flow is disturbed and the heating performance is deteriorated. Therefore, in the heat pump system, the defrosting mode (cooling mode) of the heat pump system is performed to remove the frost attached to the fin. On the other hand, in this defrost mode, the high-temperature refrigerant discharged from the compressor 10 passes through the outdoor heat exchanger 20, and the frost attached to the fin is converted into the condensed water, so that the rapid drainage of the condensed water should proceed.

Accordingly, the heat exchanger 500 further includes a drain pin 400 to allow rapid drainage of the condensed water, and a detailed description thereof will be given later. Reference numeral 40 denotes an indoor heat exchanger, 50 denotes a gas-liquid separator, and 60 denotes a four-way valve.

Hereinafter, the heat exchanger 500 will be described in detail.

Referring to FIG. 2, the heat exchanger 500 includes a plurality of tubes 100 stacked one on the other along the longitudinal direction, a pair of headers 200 connected to both ends of the tubes 100, And a plurality of radiating fins 300 coupled with the tubes 100. Here, the tubes 100 are multi-channel flat tubes having a plurality of channels formed therein (see FIG. 3). The tube 100 and the radiating fins 300 are integrally formed through brazing after assembly. Here, the structure of the tube 100, the header 200, and the like is the same as that of the known tube 100 and the header 200, and thus a detailed description thereof will be omitted. Hereinafter, .

In the heat exchanger 500, the heat dissipation fin 300 is vertically installed in a plate-like shape in the direction of stacking the tubes 100 and coupled with the tubes 100, and a plurality of heat dissipation fins 300 are installed along the longitudinal direction of the tubes 100 And are arranged to be spaced apart from each other in a horizontal direction.

3 and 4, the radiating fin 300 includes a plate body 310 and a bending portion 320. [ The plate body 310 includes a plurality of tube insertion openings 311 in which the tubes 100 are vertically stacked and inserted in the tube 100 in a widthwise direction, Respectively.

The tube insertion port 311 is spaced along the longitudinal direction (longitudinal direction) of the plate body 310 in correspondence with the positions of the tubes 100, (Not shown). The tube insertion port 311 may have a width corresponding to the height of the tube 100 so that the upper and lower surfaces of the tube 100 are in close contact with each other. Further, it is preferable that the tube insertion port 311 is formed such that a front surface (one direction) through which air mainly to be frozen flows is opened.

Meanwhile, the plate body 310 has a plurality of louvers 312 formed between the tube insertion holes 311 so as to improve heat exchange.

Referring to FIG. 5, the louvers 312 are formed so as to be inclined in one direction without any direction change along the direction in which the air is introduced, thereby optimizing the air flow.

) 보다 공기출구부 측의 루버각(

)이 더 크게 형성되어 있으며, 또한 공기입구부 측의 루버길이(Li)도 공기출구부측의 루버길이(Lo)보다 더 작게 형성되는 것이 바람직하다. 이는, 루버각이 커질수록 방열량과 공기 저항이 증가하기 때문에, 공기입구부 측과 공기출구부 측의 루버(312)의 각도를 달리함으로써 원활한 공기의 흐름을 유도함은 물론 향상된 방열효과를 얻을 수 있고, 공기입구부의 동결을 지연시킬 수 있기 때문이다. In addition, the louvers 312 have different angles and lengths with respect to the air inlet side and the air outlet side, respectively, from which the air flows. In detail, the louvers 312 are disposed at a position corresponding to the louver angle at the air inlet side

), The louver angle at the air outlet side (

And the louver length Li on the air inlet side is also preferably smaller than the louver length Lo on the air outlet side. This is because, as the louver angle increases, the amount of heat radiation and the air resistance increase. Therefore, by changing the angle of the louver 312 at the air inlet side and the air outlet side, it is possible to induce smooth air flow, , So that the freezing of the air inlet portion can be delayed.

,

)와 루버길이(Li,Lo)는, 공기입구부 측에서 공기출구부 측으로 갈수로 점진적으로 크게 하거나, 복수의 단계로 구분하여 단계별로 크게 형성할 수도 있다. Meanwhile, the louver angles of the louvers 312

,

) And the louver lengths (Li, Lo) may be gradually increased from the air inlet side to the air outlet side, or they may be divided into a plurality of steps and formed to be large in stages.

6 and 7, the bent portion 320 is integrally connected to the uppermost and lowermost ends of the protruding plate body 310, and is bent from the plate body 310, (310) are connected to each other. In detail, the bending portion 320 is bent to a predetermined width so that the plate body 310 can be maintained at a predetermined interval when the plate body 310 is arranged in a spaced-apart manner, and the plate bodies 310 are integrally joined after brazing, (500) improves the reliability.

The bending portion 320 may be bent at a right angle along the longitudinal direction of the tube 100 as shown in the figure, And the bent portions 320 may serve as a conventional side plate. Accordingly, the heat exchanger 500 can have the same structure as the side plate through the radiating fins 300 without having a separate side plate. However, this is a preferred embodiment. In addition to the shape bent at right angles as described above, the bent portion 320 can be bent in various other shapes as long as the above-mentioned object can be achieved.

The width W of the bent portion 320 may be smaller than the width W of the plate body 310. In addition, This is because the condensed water from the bent bent portion 320 adversely affects the discharge of the condensed water at the lower end when the condensed water is discharged downward.

Meanwhile, the bent portion 320 further includes an assembly portion 321 for assembling the adjacent portions. The assembling portion 321 improves the fusion-bondability between the bent portions 320 when brazing, and prevents the bent portion 320 from being sagged in a downward direction.

The assembly portion 321 includes a fitting groove 3211 formed at the end of the bent portion 320 and a fitting protrusion 3210 protruding from the adjacent bent portion 320 and inserted into the fitting groove 3211 3212) are preferably included.

The plate body 310 further includes a contact support 313 extending along the side surface of the tube 100 from the tube insertion port 311 and contacting the tube 100. The contact support portion 313 can increase the contact area with the side surface of the tube 100 to improve the coupling with the tube 100 and maintain a vertically standing position without shaking, And the heat dissipation fins 300 can be improved.

Here, the width of the air inlet portion side and the width of the air outlet portion side may be different from each other, as described below, although the front and rear surfaces of the contact support portion 313 may have the same width , And a description thereof will be given.

8, the contact support portion 314 includes a first contact portion 3141 provided at a front portion of the air inlet side and a second contact portion 3141 integrally formed with the first contact portion 3141, And a second contact portion 3142 provided on the portion.

The second contact portion 3142 may be formed to have a larger width than the first contact portion 3141 so as to increase the contact area with the tube 100 from the air inlet side toward the air outlet side. ) Contact area.

This is because the low refrigerant inside the tube 100 on the side of the air inlet having a high occurrence frequency of the frost attachment lowers the heat exchange efficiency with the radiator fins 300 to reduce the occurrence of frost in the air inlet, It is possible to improve the performance by increasing the contact area on the side of the low air outlet portion.

For example, the first contact portion 3141 and the second contact portion 3142 may have a rectangular planar shape, and the width of the second contact portion 3142 may be greater than the width of the first contact portion 3141 .

9, the first contact portion 3141a may gradually increase the contact area of the first contact portion 3141a from the front toward the rear of the second contact portion 3142, A plane shape can be formed in a triangular shape as shown in Fig.

The protruding end 310a may be formed on the plate body 310 such that the front end of the plate body 310 protrudes from the front surface of the tube 100 after the tube 100 is inserted. This is because freezing occurs at the air inlet portion on the front surface of the plate body 310 when the heat pump system is heated, and drainage of the condensed water can be drained downward without interference of the tube 100 .

According to the above, the louver 312 is not formed on the protruding portion of the plate body 310, thereby minimizing freezing.

10 and 11, the plate body 310 is provided on a front surface of the plate body 310 through which air is introduced, and is divided into a plurality of tubes 100, And a drain pin 400 for draining the condensed water downward.

The drain pin 400 is coupled to a front surface of the plate body 310 where one side generates a large amount of frost, and the lower side thereof is formed to be downward sloped to facilitate drainage of condensed water. Here, it is preferable that the drain pin 400 is formed in a triangle shape that widens in a downward direction as shown in FIG. 3, but it may be formed in a vertical direction as a preferred embodiment.

It is preferable that the drain pin 400 is formed in a triangular shape with its front and rear sides opened and the front side thereof formed in a triangle shape and further formed integrally with the plate body 310. The drain pin 400 is formed by vertically or downwardly inclining the cut end of the upper portion of the plate body 310, which is partially cut away from the upper end of the protruding end of the plate body 310, so that the condensed water flows downward So that the heating performance after defrosting can be optimized. Since the drain pin 400 is coupled to the lower side between the front tubes 100 of the plate body 310 so that even if the frost is attached to the drain pin 400 and obstructs the air flow, Air can pass to the upper side of the indoor unit 400, and the heating time can be increased.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

... 공기입구부 측의 루버각도

... 공기출구부 측의 루버각도
W... 플레이트 몸체의 폭
w... 절곡부의 폭100 ... tube 200 ... header
300 ... radiating fin 310 ... plate body
310a ... protruding end 311 ... tube insertion port
312 ... louvers 313, 314, 314a ... contact support
3141, 3141a ... first contact portion 3142 ... second contact portion
320 ... bent portion 321 ... assembly portion
3211 ... fitting groove 3212 ... fitting projection
400 ... drain pin 500 ... heat exchanger
Li ... louver length on the air inlet side
Lo ... Louver length on the air outlet side

... louver angle at the air inlet side

... louver angle at the air outlet side
W ... Width of plate body
w ... width of the bend

Claims (12)

A plurality of tubes which are vertically stacked in a direction of stacking the tubes and which are arranged so as to be laterally spaced apart from each other along the longitudinal direction of the tubes and which are coupled to the tubes, In the heat exchanger,
The heat-
A plate body having a plurality of tube insertion openings formed in a plate shape and spaced apart from each other in the longitudinal direction corresponding to the tubes arranged in a stacked manner and opened in one direction to insert the tubes,
And a bending portion integrally connected to the uppermost and lowermost ends of the protruded plate body and bent from the plate body to connect adjacent plate bodies.
The method according to claim 1,
Wherein the plate body includes a plurality of louvers formed obliquely between the tube insertion openings,
Wherein the louvers are formed to be inclined in one direction along a direction in which air is introduced.
The method of claim 2,
The louvers,
Wherein a louver angle and a louver length on an air outlet side are formed to be larger than a louver angle and a louver length on an air inlet side side where air is introduced.
The method of claim 3,
The louver angles and louver lengths of the louvers,
Wherein the heat exchanger is gradually formed from the air inlet side to the air outlet side, or is divided into a plurality of stages and formed to be large in stages.
The method according to claim 1,
The plate body includes:
Further comprising a contact support extending from the tube insertion port along a side of the tube and in contact with the tube.
The method of claim 5,
The contact-
A first contact portion provided at a front portion of the air inlet side,
And a second contact portion which is integrally formed with the first contact portion and is provided at the rear remaining portion of the air outlet side and has a tube contact area that is wider than the first contact portion so that contact with the tube from the air inlet side toward the air outlet side Heat exchanger with increased area.
The method of claim 6,
The first contact portion and the second contact portion may have a rectangular shape in plan view,
Wherein the first contact portion gradually increases in contact area from the front to the rear of the second contact portion, and the plane shape is a triangular shape.
The method according to claim 1,
The plate body includes:
And the end of the front surface of the tube is protruded from the front surface of the tube after the tube is inserted.
The method according to claim 1,
The plate body includes:
A plurality of tubes arranged in a longitudinal direction between the tubes, one side of which is coupled to the front of the plate body so that the condensed water can be drained downward, Further comprising a drain pin formed obliquely and having front and rear surfaces and a bottom open.
The method of claim 9,
The drain pin
Wherein the plate body is formed integrally with the plate body and is partially cut away from the upper end of the protruding end of the plate body, and the cut end of the upper end is bent downward or downward.
The method according to claim 1,
The bending portion may further include an assembling portion for assembling to each other adjacent to each other,
Wherein,
A fitting groove formed at an end of the bending portion, and a fitting protrusion formed to protrude from the adjacent bending portion and inserted into the fitting groove.
The method according to claim 1,
Wherein a width direction width of the bent portion is smaller than a width direction width of the plate body.

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