KR100864841B1 - Heat exchanger assembly having heat pipe - Google Patents

Abstract

The heat exchanger assembly according to the present invention comprises a pair of header pipes spaced parallel to each other and closed at both ends, and

A heat exchanger comprising a plurality of flat tubes spaced apart from each other and arranged in parallel between the pair of header pipes to form a flow path of a first heat exchange medium, and a heat exchange core portion provided with a heat radiation interposed between the flat tubes group;

A receiver dryer connected to one of the pair of header pipes for supercooling the first heat exchange medium; And

A plurality of heat pipes in which a second heat exchange medium is filled inside and closed at both ends are parallel to each other, and a heat receiving unit for absorbing heat from the receiver dryer and a heat radiating unit for dissipating heat to outside air are provided at both sides. Characterized in that each provided with a heat exchange auxiliary means provided.

Description

Heat exchanger assembly having heat pipe}

1 is a schematic configuration diagram of a conventional vehicle air conditioner.

Figure 2 is a perspective view of one embodiment of a heat exchanger assembly for use in a vehicular air conditioner of the present invention.

<Description of the symbols for the main parts of the drawings>

100 ... heat exchanger 110,120 ... header pipe

112 ... inlet conduit 114 ... connector

130 ... flat tube 140 ... heat-resistant

150 ... Receiver drier 154 ... Outflow conduit

200 ... heat exchange aids 210 ... heat pipes

The present invention relates to a heat exchanger assembly having a heat exchanger and a receiver dryer used as a condenser in a vehicle air conditioner, and more particularly, to a heat exchanger assembly in which the refrigerant supercooling performance of the receiver dryer is improved.

In general, a vehicle air conditioner includes an air conditioner for the purpose of supplying cold air or dehumidifying the interior of a vehicle, which is constituted by a general air refrigeration cycle. That is, by allowing the evaporator to obtain the latent heat of evaporation necessary for evaporating the refrigerant from the air around the evaporator, cool air is generated, and the cool air and the removal of moisture are achieved by blowing the cool air into the vehicle interior. In addition to the evaporator, a typical vehicle air conditioner includes a compressor for compressing a refrigerant, a condenser for condensing the refrigerant, a receiver dryer for removing moisture from the refrigerant, and an expansion valve for rapidly inflating the liquid refrigerant.

1 shows a schematic configuration diagram of a conventional vehicle air conditioner.

Referring to the drawings, an air conditioner includes an evaporator 11 for evaporating a refrigerant in a liquid state into a gas state, a compressor 12 for compressing a refrigerant in a gaseous state introduced from the evaporator 11, and an inflow from the compressor 12. And a condenser 13 for condensing the refrigerant having a high pressure gas state into a liquid state. The liquid refrigerant flowing from the condenser 13 is removed from the receiver dryer 14 of water and foreign matter, rapidly expanded in the expansion valve 15, flows into the evaporator 11 and evaporates again. The fan 17 driven by the motor 17a is installed close to the condenser 13 so that heat generated when the refrigerant is condensed can be discharged to the outside, and the blower 18 driven by the other motor 18a. Serves to blow cold air generated in the evaporator 11 to the interior of the vehicle.

Various attempts have been made to improve the performance of such an air conditioner. One such attempt is to allow the refrigerant to subcool in the receiver drier before it exits the condenser and enters the expansion valve. However, since the air outside the vehicle, a fan for a radiator, or a fan for a condenser is generally applied for the above supercooling, there is a problem in that the actual supercooling effect of the refrigerant cannot be expected.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger assembly for use in a vehicle air conditioner that can improve the refrigerant supercooling performance of the receiver dryer.

In addition, it aims to improve the cooling performance of the vehicle air conditioner through this.

In order to achieve the above object, a heat exchanger according to the present invention comprises a pair of header pipes spaced in parallel with each other and closed at both ends, and

A heat exchanger comprising a plurality of flat tubes spaced apart from each other and arranged in parallel between the pair of header pipes to form a flow path of a first heat exchange medium, and a heat exchange core portion provided with a heat radiation interposed between the flat tubes group;

A receiver dryer connected to one of the pair of header pipes for supercooling the first heat exchange medium; And

A plurality of heat pipes in which a second heat exchange medium is filled inside and closed at both ends are parallel to each other, and a heat receiving unit for absorbing heat from the receiver dryer and a heat radiating unit for dissipating heat to outside air are provided at both sides. Characterized in that each provided with a heat exchange auxiliary means provided.                     

In the heat exchanger assembly according to the present invention, the heat receiving portion penetrates the receiver drier and is located therein, and the heat radiating portion is spaced apart from one side of the heat exchange core portion.

In the heat exchanger assembly according to the present invention, the heat pipe of the heat dissipation portion is characterized in that the heat radiation to promote heat exchange with the outside air is interposed.

Hereinafter, a heat exchanger assembly according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of one embodiment of a heat exchanger assembly for use in a vehicle air conditioner according to the present invention. Since the overall configuration of the air conditioner is similar to that of FIG. 1, description thereof is omitted.

Referring to the drawings, the heat exchanger 100 used as a condenser has first and second header pipes 110 and 120 spaced apart from each other and extending in parallel. The header pipes are closed at both ends and provided as tanks for storing refrigerant, which is a heat exchange medium, in an inner space thereof, and a baffle (not shown) is inserted into the inner space to distinguish the tank. The first and second header pipes 110 and 120 are provided with a heat exchange core 130 including a flat tube 131 which is a flow path of a refrigerant, and a heat dissipation fin 136 for promoting heat exchange. Both ends of the flat tube 131 are inserted between the plurality of slits (not shown) formed in parallel to the first and second header pipes 110 and 120 to face each other, and are fixed by brazing. The heat dissipation fin 136 interposed between the flat tubes 131 is brazed and fixed to the flat surface of the flat tube. One side of the second header pipe 120 is provided with an inlet conduit 112 for the inlet of the refrigerant. In addition, one side of the first header pipe 110 is provided with a connection conduit 114 is connected to the receiver dryer (150).

The receiver dryer 150 serves to remove moisture and foreign matters of the refrigerant by providing a filter layer (non-layer) therein, and the refrigerant passing through the expansion valve (15 of FIG. 1) through the outlet conduit 154. Flows into. The outer surface of the receiver dryer 150 has a plurality of through-holes 152 is formed, one side of the plurality of heat pipes 210 in parallel spaced at a predetermined interval is inserted into the receiver dryer 150 through this and brazed It is fixed. The other side of the heat pipe is spaced apart from the heat exchange core unit 130 by a predetermined interval in the X-axis direction. Therefore, the heat pipe 210 is positioned to face the fan for condenser (17 in FIG. 1) before the heat exchange core portion 130.

The heat pipes are arranged in parallel to form a plurality of heat exchange auxiliary means 200, one side of which is inserted into the receiver dryer 150 is a heat receiving portion 202 that absorbs heat, and is spaced apart from the heat exchange core portion 130. The other side serves as a heat dissipation unit 204 for dissipating heat. The heat pipe of the heat dissipation unit is provided with a heat dissipation fan 220 for promoting heat exchange. The heat dissipation fan 220 is configured by stacking a plurality of plates.

Heat pipe 210 is a heat transfer medium in the pipe transfers heat between the both ends of the pipe while the gas-liquid phase change process continuously, by moving the heat using latent heat, compared to the conventional heat transfer equipment It is known to exhibit a very large heat transfer performance in spite of the slight temperature difference. In more detail, the heat exchange medium having a two-phase condensability inside the pipe 210 closed at both ends is formed by encapsulating liquid and vapor in a balanced state. If the temperature of the heat receiving portion 202 is relatively higher than the temperature of the heat dissipating portion 204, the heat exchange medium of the heat receiving portion absorbs heat while breaking the equilibrium of the liquid and vapor bubbles. The absorbed heat is discharged by moving to the heat dissipation unit 204 along the inside of the heat pipe, thereby enabling rapid heat transfer from the heat receiving unit 202 to the heat dissipation unit 204.

Referring to the operation of the heat exchanger 100, the refrigerant introduced into the second header pipe 120 through the inlet conduit 112 blocks the internal spaces of the first and second header pipes 110 and 120 at predetermined intervals. Under the influence of (not shown), the flat tube 131 of the heat exchanging core 130 is meandered in order to release heat. The refrigerant condensed by dissipating heat is introduced into the receiver dryer 150 through the connection pipe 114.

At this time, the inside of the receiver dryer 150, that is, the heat receiving portion 202 of the heat exchange auxiliary means maintains a temperature of about 60 ℃ under the influence of the condensed refrigerant and the heat dissipating portion 204 of the fan (17 in FIG. 1) of the condenser The effect is to maintain a temperature of 50 ℃. Therefore, heat transfer occurs from the condensed refrigerant in the receiver dryer 150 to the outside air, and the refrigerant is in a supercooled state. In this way, the refrigerant, which has been supercooled through the receiver dryer 150 and removed from water and foreign matter, is guided to the expansion valve (15 of FIG. 1) through the outlet conduit 154.

As described above, the heat exchanger assembly used in the vehicle air conditioner of the present invention may improve the refrigerant supercooling performance of the receiver driver by employing a heat exchange aid provided with a heat pipe.

In addition, it is possible to improve the heat exchange performance of the evaporator it is possible to improve the cooling performance of the vehicle air conditioner.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A pair of header pipes spaced parallel to each other and closed at both ends, and A heat exchanger comprising a plurality of flat tubes spaced apart from each other and arranged in parallel between the pair of header pipes to form a flow path of a first heat exchange medium, and a heat exchange core portion provided with a heat radiation interposed between the flat tubes group; A receiver dryer connected to one of the pair of header pipes for supercooling the first heat exchange medium; And A plurality of heat pipes in which a second heat exchange medium is filled inside and closed at both ends are parallel to each other, and a heat receiving unit for absorbing heat from the receiver dryer and a heat radiating unit for dissipating heat to outside air are provided at both sides. Heat exchanger assembly, characterized in that provided with a heat exchange auxiliary means provided respectively. The method of claim 1, The heat receiving unit is located through the receiver dryer therein, the heat dissipation assembly, characterized in that located on one side of the heat exchange core portion spaced apart from this. The method of claim 2, The heat pipe of the heat dissipation unit is a heat exchanger assembly, characterized in that the heat radiation interfacing to promote heat exchange with the outside air.

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