KR20100081090A

KR20100081090A - Heat exchange system of air conditioner

Info

Publication number: KR20100081090A
Application number: KR1020090000368A
Authority: KR
Inventors: 석경수
Original assignee: 주식회사 두원공조
Priority date: 2009-01-05
Filing date: 2009-01-05
Publication date: 2010-07-14

Abstract

PURPOSE: A heat exchange system for an air conditioner is provided to improve cooling efficiency by heat-exchanging a refrigerant flowing in a header pipe with a refrigerant passing through an evaporator. CONSTITUTION: A heat exchange system for an air conditioner comprises a compressor(20), a condenser(30), an expansion unit(40), and an evaporator(50). The compressor compresses a refrigerant with high-temperature and high-pressure. The condenser has two header pipes and condenses the compressed refrigerant. The expansion unit expands the condensed refrigerant. The evaporator heat-exchanges expanded refrigerant with air and evaporates the refrigerant.

Description

Heat exchange system of air conditioner

The present invention relates to a heat exchange system of an air conditioner, and more particularly, to a heat exchange system of an air conditioner that is heat exchanged between refrigerants in a condenser of an air conditioner.

As shown in FIG. 1, an air conditioner to which a conventional heat exchange system is applied includes a compressor (2) for compressing a refrigerant at high temperature and high pressure, a condenser (3) for condensing the compressed refrigerant, and a condenser (3). An expansion valve 4 for expanding the refrigerant, and an evaporator 5 for evaporating the latent heat by evaporating the refrigerant passing through the expansion valve 4 with ambient temperature air, and And a fan and blower. In addition, a plurality of auxiliary heat exchangers are provided depending on the air conditioning system, and the expansion valve may be replaced by a capillary tube. The refrigerant passing through the evaporator 5 flows into the compressor 2 and circulates.

However, in the air conditioner to which the conventional heat exchange system is applied, when there is a lot of gaseous components in the refrigerant flowing into the condenser due to the high heat load of the refrigeration cycle, a large amount of gaseous components flow out before the gas-liquid components are separated from the condenser. In addition, it was not enough to cool down, and because some of the refrigerant in the gaseous state is sent to the expansion valve there was a problem that can not obtain sufficient cooling performance in the evaporator.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchange system of an air conditioner to increase the cooling performance while reducing the assembly parts and assembly labor with a simple structure.

The present invention for achieving the above object, the compressor for compressing the refrigerant to a high temperature, high pressure, a condenser having two header pipes and condensing the compressed refrigerant, expansion means for expanding the refrigerant passing through the condenser, In a heat exchange system of an air conditioner having an evaporator in which the refrigerant passing through the expansion means is evaporated while exchanging heat with air, the header pipe of one side of the condenser includes first and second passages through which refrigerant flows along a longitudinal direction. The refrigerant passing through the evaporator is heat exchanged between the refrigerant in the first passage and the second passage while flowing in the second passage of the header pipe of the one side of the condenser.

The refrigerant flowing in the first passage and the second passage is heat exchanged while flowing in an opposite flow.

One end of the first passage is formed with a refrigerant inlet flowing into the condenser, and the other end of the first passage is formed with a refrigerant outlet through which the supercooled refrigerant flows out.

According to the heat exchange system of the air conditioner according to the present invention, by allowing the refrigerant flowing in the header pipe of the condenser to exchange heat with the refrigerant passing through the evaporator, it is possible to increase the cooling performance while reducing the assembly parts and assembly labor in a simple structure.

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

Figure 2 is a block diagram showing a heat exchange system of the air conditioner to which the present invention is applied. As shown, the air conditioner to which the heat exchange system of the present invention is applied is a compressor 20 for compressing a refrigerant to a high temperature and a high pressure, Condenser 30 for condensing the refrigerant, expansion means 40 for expanding the refrigerant passing through the condenser 30, and the evaporator 50 evaporates while the refrigerant passing through the expansion means 40 evaporates heat exchange with the air It includes, and has an air conditioning case and fan and blower not shown. In addition, a plurality of auxiliary heat exchangers are provided according to the air conditioning system, and the expansion means 40 is an expansion valve or a capillary tube. The refrigerant passing through the evaporator 50 passes through the first header pipe, which will be described later, of the condenser 30, exchanges heat with the refrigerant condensed while passing through the condenser 30, and then flows into the compressor 20 to circulate.

3 is a configuration diagram illustrating the condenser of FIG. 2, and FIG. 4 is a cross-sectional view illustrating the first header pipe of FIG. 3. As shown, the condenser 30 to which the present invention is applied includes a first header pipe 110 and a second header pipe 120 spaced apart from each other in parallel with each other, and the first header pipe 110 and the second header pipe. A plurality of tubes 104 inserted at both ends of the slots 120 and disposed in parallel to each other, a plurality of heat dissipation fins 106 interposed between the tubes 104, and the second header pipe 102. It has a receiver 130 that is integrally coupled to.

The first header pipe 110 is divided into first and second passages S1 and S2 through which the refrigerant flows along the longitudinal direction by the partition 111, and the refrigerant passing through the evaporator 50 is formed in the first header pipe 110. Heat is exchanged between the refrigerant in the first passage S1 and the second passage S2 while flowing in the second passage S2 of the first header pipe 110 of the condenser 30. The partition 111 has a curved shape for efficient heat exchange, and may be formed as a partition of various shapes.

The first refrigerant inlet 112 communicating with the first passage S1 and the second refrigerant outlet 114 communicating with the second passage S2 are formed at an upper portion of the first header pipe 110. A first refrigerant outlet 113 communicating with the first passage S1 and a second refrigerant inlet 115 communicating with the second passage S2 are formed below the first header pipe 110. Therefore, the refrigerant flowing in the first passage S1 and the second passage S2 of the first header pipe 110 are heat exchanged while flowing in the opposite flow.

Two communication holes through the receiver 130 are formed in the lower portion of the second header pipe 120. These two communication holes are aligned with the pipe-shaped holes formed in the lower part of the receiver 130, and the outlet 130a through which the refrigerant flows out of the condenser 30 from the condenser 30 to the receiver 130, and the receiver ( In 130, an inlet 130b through which the refrigerant flows into the subcooling region is formed.

Upper and lower ends of the first header pipe 110 and the second header pipe 120 are sealed by cap members 116 and 126, and a first passage S1 of the first header pipe 110 is provided. A plurality of baffles 117 and 127 forming a compartment are fixed inside the second header pipe 120 to communicate with the tube 104 and four refrigerant flow paths P1, P2, P3, and P4. Form. The P1, P2, and P3 channels form a condensation region, and the P4 channel forms a supercooling region.

The receiver 130 is fitted to the lower body 131 integrally brazed to the lower portion of the second header pipe 120, the upper body of the lower body 131 is fixed by brazing and fixed bracket 133 The upper body 132 is fixed to the upper portion of the second header pipe 120 by.

The lower body 131 is manufactured by extrusion, and the upper body 132 is manufactured by forging. A filter 134 is installed inside the lower body 131, and a cap 135 is screwed to a lower end of the lower body 131. In addition, a desiccant assembly 136 is installed inside the upper body 132. The filter 134 is attached to the upper side of the cap 135 to trap foreign matters, the lower end of the filter 134 is provided with an O-ring to prevent leakage and maintain airtightness.

In the heat exchange system of the air conditioner of the present invention configured as described above, the refrigerant of the high temperature and high pressure compressed by the compressor 20 passes through the first refrigerant inlet 112 of the condenser 30. After flowing into the passage (S1), the condensed while passing through the P1, P2 and P3 flow path through the tube 104 between the second header pipe 120, and then supercooled while flowing through the P4 flow path through the receiver 130 The refrigerant flows through the outlet 113.

Meanwhile, the low temperature refrigerant discharged from the evaporator 50 flows into the second passage S2 of the first header pipe 110 through the second refrigerant inlet 115 of the condenser 30, and then, The heat is exchanged with the refrigerant flowing in the first passage S1 of the first header pipe 110 to increase the temperature, and flows out through the second refrigerant outlet 114 to enter the compressor 20 and circulate.

Therefore, the low temperature gaseous refrigerant discharged from the evaporator 50 flows into the refrigerant outlet side of the condenser 30 and flows out through the refrigerant inlet side of the condenser 30 so that the condenser is formed. The refrigerant passing through the 30 is more cooled than in the prior art, and the evaporator is cooled even though the heat load is increased as it is cooled to a lower temperature at the outlet of the condenser, beyond the limit that can be cooled by the air passing through the condenser in the subcooling region of the condenser. As a result, the refrigerant can be introduced at lower dryness and lower temperature, thereby obtaining sufficient cooling performance. The efficiency is improved by the refrigerant circulation of the refrigeration cycle can greatly improve the fuel economy of the vehicle.

That is, according to the present invention, by using the header pipe on one side of the condenser, the cooling performance can be improved with a simple structure while greatly reducing the assembly parts and the man-hour.

1 is a configuration diagram showing an air conditioner to which a conventional heat exchange system is applied;

2 is a block diagram showing an air conditioner to which a heat exchange system of the present invention is applied;

3 is a block diagram showing a condenser of FIG.

4 is a cross-sectional view illustrating a first header pipe in the condenser of FIG. 3.

20: compressor 30: condenser

40: expansion means 50: evaporator

110: first header pipe 111: partition wall

112: first refrigerant inlet 113: first refrigerant inlet

114: second refrigerant inlet 115: second refrigerant inlet

120: second header pipe 130: receiver

Claims

A compressor for compressing the refrigerant at a high temperature and a high pressure, a condenser having two header pipes to condense the compressed refrigerant, an expansion means for expanding the refrigerant passing through the condenser, and a refrigerant passing through the expansion means; A heat exchange system of an air conditioner having an evaporator which evaporates while exchanging heat,

The header pipe of one side of the condenser has first and second passages through which refrigerant flows along a longitudinal direction,

And the refrigerant passing through the evaporator is heat exchanged between the first passage and the refrigerant inside the second passage while flowing in the second passage of the header pipe of the one side of the condenser.

The method according to claim 1,

And the refrigerant flowing in the first passage and the second passage is heat exchanged while flowing in an opposite flow.

The method according to claim 1 or 2,

One end of the first passage is formed with a refrigerant inlet flowing into the condenser,

The other end of the first passage is a heat exchange system of the air conditioner, characterized in that the refrigerant outlet for the refrigerant outflow is formed in the condenser.