KR20050025369A - Thermal expansion valve and second heat exchanger for air conditioning device using the expansion valve - Google Patents

Abstract

An expansion valve and a secondary heat exchanger using the same for an air conditioner are provided to connect the expansion valve to a secondary heat exchanger via bypass inlet/outlet provided to the expansion valve instead of mounting a refrigerant pipe or a connection flange. An expansion valve(100) is to be attached to a secondary heat exchanger integrally joined to a side of an evaporator. The expansion valve includes a bypass inlet(105) and a bypass outlet(106) in a body part(101). Through the bypass inlet, a refrigerant transferred from a condenser is introduced into the secondary heat exchanger. Through the bypass outlet, which is communicated with a first path(102) of the body part, refrigerant passing through the secondary heat exchanger and the first path is introduced into an inlet of the evaporator.

Description

Expansion valve and second heat exchanger for air conditioning device using the expansion valve}

The present invention relates to an expansion valve and a secondary heat exchanger for an air conditioner using the same. By simplifying the assembly structure of the heat exchanger and expansion valve, the number of parts and assembly labor is reduced, and easy to assemble an expansion valve and a secondary heat exchanger for an air conditioner using the same.

The air conditioner of the car is a vehicle's interior that is installed for the purpose of securing the driver's front and rear view by removing the frost from the windshield or heating in the summer or winter, or during the rain or winter. In general, such an air conditioner is equipped with a heating system and a cooling system at the same time, and selectively introduces outside air or bet to heat or cool the air, and then blows it into the interior of the vehicle to cool, heat, or ventilate the interior of the vehicle. .

In general, a cooling system of such an air conditioner has a compressor (1) for compressing and delivering a refrigerant as shown in FIG. 1, and a condenser (condenser) for condensing a high-pressure refrigerant from the compressor (1). 2) a throttling mechanism 3 such as an expansion valve for throttling a refrigerant condensed and liquefied in the condenser 2, and a low-pressure liquid refrigerant throttled by the throttling mechanism 3 for automobiles. It consists of a refrigeration cycle consisting of an evaporator (4) for cooling the air discharged to the room by the endothermic action of the latent heat of the refrigerant by evaporating heat exchanged with the air blown to the room side, through the refrigerant circulation process as follows Cool the car's interior.

When the cooling switch (not shown) of the vehicle air conditioner is turned on, the compressor 1 first drives the engine power and sucks and compresses the low-temperature, low-pressure gaseous refrigerant to the condenser 2 in a high-temperature, high-pressure gas state. The condenser 2 exchanges the gaseous refrigerant with outside air to condense it into a liquid of high temperature and high pressure. Subsequently, the liquid refrigerant discharged from the condenser 2 in the state of high temperature and high pressure rapidly expands by the throttling action of the throttling mechanism 3 and is sent to the evaporator 4 in the low temperature and low pressure wet state, and the evaporator 4 is The refrigerant is heat-exchanged with the air blower (not shown) blown into the vehicle interior. Accordingly, the refrigerant is evaporated in the evaporator and discharged in a gas state of low temperature and low pressure, and is again sucked into the compressor 1 to recycle the refrigeration cycle as described above. In the above refrigerant circulation process, the cooling of the vehicle interior is cooled by latent heat of evaporation of the liquid refrigerant circulating in the evaporator 4 while the air blown by the blower (not shown) passes through the evaporator 4 as described above. It is made by discharging the inside of the car in a cold state.

As described above, the cooling efficiency of the air conditioner that cools through the refrigerating cycle is determined by various factors, among which the supercooling of the high-pressure refrigerant just before being throttled by the throttling mechanism 3 such as an expansion valve. The superheat degree of the low pressure refrigerant discharged from the evaporator affects the refrigerant flow, the pressure drop in the evaporator 4, the superheated region of the evaporator 4 (partial region of the refrigerant outlet side of the evaporator), and the volumetric efficiency of the compressor 1, respectively. This has a significant effect on the cooling efficiency of the air conditioning system.

For example, if the subcooling of the refrigerant before the condensation increases, the specific volume of the refrigerant is reduced, the refrigerant flow is stabilized, and the refrigerant pressure drop in the evaporator 4 is reduced, so that the cooling efficiency of the air conditioner is increased, and the power of the compressor 1 is increased. Consumption is reduced. On the other hand, if the superheat of the low-pressure refrigerant discharged from the evaporator 4 is not properly maintained, the superheated region of the evaporator 4 having a relatively high temperature at which the refrigerant is completely vaporized to prevent the compressor from entering the liquid refrigerant. Since the air conditioning system has to be enlarged, the cooling performance of the air conditioner is reduced. Therefore, automotive air conditioners generally increase the cooling performance when the supercooling degree of the refrigerant before being throttled and the superheating degree of the refrigerant discharged from the evaporator 4 are properly maintained.

Accordingly, in order to improve the cooling performance of the vehicle air conditioner, the supercooling of the high-temperature and high-pressure liquid refrigerant throttled by the throttling mechanism 3 before entering the evaporator 4 and the superheat of the refrigerant discharged from the evaporator 4 Various attempts have been made to optimize the bar. At present, as shown in FIG. 2, the low temperature and low pressure gaseous refrigerant discharged from the evaporator 4 and the high temperature and high pressure liquid refrigerant flowing into the throttling mechanism 3 are shown. The secondary heat exchanger 6 which supercools the high-temperature, high-pressure liquid refrigerant before throttling and optimizes the superheat degree of the low-pressure refrigerant discharged | emitted from the evaporator 4 by mutual heat exchange is mainly used.

The secondary heat exchanger 6 exchanges heat between the high temperature and high pressure gaseous refrigerant before being throttled by the throttling mechanism 3 and the low temperature and low pressure gaseous refrigerant discharged from the evaporator 4 so as to exchange the refrigerant flowing into the evaporator 4. The superheated region of the evaporator 4 having a relatively high temperature is set to stabilize the flow, reduce the amount of refrigerant pressure drop in the evaporator 4, and to allow the refrigerant to evaporate completely to prevent the refrigerant from entering the liquid refrigerant. ) To be reduced. Therefore, when the secondary heat exchanger 6 is employed in the cooling system as shown in Fig. 2, the specific volume of the refrigerant flowing into the evaporator 4 is reduced so that the amount of refrigerant pressure drop in the evaporator 4 is reduced, so that the evaporator is reduced. Cooling performance of the air conditioning system is relatively high because the refrigerant flow in each cooling tube in (4) can be stabilized and the refrigerant flowing into the compressor 1 can be superheated after being discharged from the evaporator 4. The overheating area of the evaporator 4, which is a factor of deterioration, can be reduced, and the cooling efficiency of the air conditioner can be greatly increased. As a result, the compressor 1, the condenser 2, and the evaporator 4 can be made efficient, contributing to the high efficiency and miniaturization of the air conditioning apparatus.

However, in spite of the advantages as described above, the conventional secondary heat exchanger 6 has a number of components and its structure is complicated, resulting in a high manufacturing cost. In addition, since the refrigerant pipes are intricately entangled and have connections at various locations, the refrigerant pipes have limitations in improving the cooling performance of the air conditioner, and the airflow resistance of the evaporator 4 is very large, and the airtightness and durability of the refrigerant are weak. The bulky space occupies a lot of problems, such as countering the miniaturization of the cooling system.

A technique for improving the above-described problems is disclosed in Korean Patent Laid-Open No. 2002-0032812 (name: stacked secondary heat exchanger of automobile air conditioner), filed by the applicant of the present invention. Briefly described with reference to the following.

As shown, inlet 4a and outlet 4b are formed on one side of the evaporator 4 in order to reduce the aeration resistance of the evaporator 4, and the refrigerant is introduced and discharged, and the condenser 2 The secondary heat exchanger 10 for mutually heat-exchanging the low temperature and low pressure gaseous refrigerant discharged through the high temperature and high pressure liquid refrigerant and the evaporator 4 is integrally bonded to one side of the evaporator 4 and the inlet and outlet 4a ) Is installed in communication with 4b.

In addition, an expansion valve 3 and a refrigerant pipe 30 are installed at one side of the secondary heat exchanger 10 under the connection flange 20.

Here, the secondary heat exchanger 10 has a low pressure tank (12c) and a high pressure tank (11c) to form a low pressure tank 12 and a high pressure tank (11) in parallel to the upper and lower ends, respectively, and communicate the low pressure tanks (12). High pressure flow path (11c) for communicating the plurality is formed by stacking a plurality of thin plate (10a) formed to be partitioned on each side.

 When the thin plate 10a is stacked in this manner, the high pressure tank outlet 11b and the low pressure tank outlet 12b are configured at the upper end, and the high pressure tank inlet 11a and the low pressure tank inlet 12a are configured at the lower end.

Therefore, the refrigerant transferred from the condenser 2 flows into the high pressure tank inlet 11a of the secondary heat exchanger 10 along the refrigerant pipe, passes through the inside, and then expands the expansion valve 3 installed at one side. The refrigerant throttled while being passed through is introduced into the inlet 4a of the evaporator 4 along the refrigerant pipe 30.

The refrigerant introduced into the evaporator 4 flows along the internal flow path of the evaporator 4 to perform active heat exchange with external air, and then again through the outlet 4b of the evaporator 4 to the secondary heat exchanger 10. Flows into the low pressure tank inlet 12a.

The refrigerant introduced into the low pressure tank inlet 12a of the secondary heat exchanger 10 is mutually intersected with the refrigerant before flowing into the high pressure tank inlet 11a of the secondary heat exchanger 10 in the course of the flow. After heat exchange, it is transferred to the compressor 1 via the expansion valve 3.

Accordingly, the airflow resistance of the evaporator 4 is reduced and the airtightness and durability of the refrigerant are improved as well as the refrigerant flow rate is stabilized and the cooling efficiency is improved and the volume is smaller than the conventional secondary heat exchanger 6 described above. It is advantageous for miniaturization, and the assembly process is shortened.

However, it is still pointed out that the number of parts and the connection structure of the refrigerant pipe 30 are complicated to increase the number of assembly time and the time required for assembly.

An object of the present invention for solving the above problems is to simplify the structure by forming a bypass inlet and outlet in the expansion valve to be installed in the secondary heat exchange means integrally bonded to one side of the evaporator via a connecting means. Therefore, the number of parts is greatly reduced and the assembly is simplified, thereby providing an expansion valve and a secondary heat exchanger for an air conditioner using the same, which reduces manufacturing costs.

The present invention for achieving the above object is provided with a main body having a first flow path and a second flow path having an inlet and an outlet, and a temperature change of the refrigerant installed in the body and discharged from the evaporator and flowing in the second flow path. In the expansion valve comprising a head portion for reciprocating the rod in the axial direction by the expansion and contraction action, and the opening and closing means for adjusting the flow rate flowing in the first flow path in conjunction with the movement of the rod, the body has a condenser The bypass inlet is formed to allow the refrigerant transferred from the second heat exchange means to flow into the second heat exchange means, and the first refrigerant flows through the first flow path through the second heat exchange means to allow the refrigerant to be introduced into the inlet of the evaporator. It is characterized in that the bypass outlet is further formed in communication with the outlet of the flow path.

In addition, the low pressure tank and the high pressure tank to form side by side in the upper and lower, respectively, the low pressure flow path communicating the low pressure tanks and the high pressure flow path communicating the high pressure tanks are formed by stacking a plurality of plates each partitioned on both sides and each tank Secondary heat exchange means integrally joined to one side of the evaporator to communicate with the inlet and the outlet of the evaporator; A first flow path and a second flow path having an inlet and an outlet are provided, and a bypass inlet is formed to allow the refrigerant transferred from the condenser to flow into the secondary heat exchange means, and passes through the first flow path through the secondary heat exchange means. While a bypass outlet communicating with the outlet of the first flow path is formed so that the throttled refrigerant can flow into the inlet of the evaporator, and a temperature of the coolant installed in the body and discharged from the evaporator and flowing in the second flow path. An expansion valve including a head part configured to reciprocate the rod in an axial direction by expansion and contraction action according to a change, and an opening / closing means for adjusting a flow rate flowing in the first flow path in association with the movement of the rod; Characterized in that it comprises a connecting means for connecting each tank of the secondary heat exchange means and the first and second flow paths and the bypass inlet, outlet of the expansion valve, respectively.

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

The same parts as in the prior art are denoted by the same reference numerals, and repeated descriptions are omitted.

5 is a perspective view showing an expansion valve according to the present invention, Figure 6 is a cross-sectional view taken along the line A-A in FIG.

First, the expansion valve 100 of the present invention is installed in the secondary heat exchange means 10 which is integrally joined to one side of the evaporator 4, the inlet (102a) 103a and the outlet (102b) (103b) The main body 101 having the first flow path 102 and the second flow path 103 having a predetermined distance from each other is provided.

Here, the inlet port 102a and the outlet port 102b of the first flow path 102 are formed to form a right angle, and these inlet port 102a and the outlet port 102b are connected to the communication hole 104.

In addition, the opening of the outlet 102b is closed with a cap 108.

On the other hand, the inlet port 103a and the outlet port 103b of the second flow path 103 are formed in a straight line.

In addition, a bypass inlet 105 is formed in the main body 101 so that the refrigerant transferred from the condenser 2 may flow into the secondary heat exchange means 10, and the secondary heat exchange means 10 may be formed. Passes through the first flow path 102 of the expansion valve 100 and communicates with the outlet 102b of the first flow path 102 so that the quenched refrigerant may enter the inlet 4a of the evaporator 4. Bypass outlet 106 is formed.

On the one side of the main body 101, a fluid which is discharged from the evaporator 4 and expands and contracts in accordance with the temperature change of the refrigerant flowing in the second flow path 103 via the secondary heat exchange means 10 is On the center side of the diaphragm 112 and the diaphragm 112 which is provided inside the thermostat chamber 111 is provided in the thermostat chamber 111 and is displaced in the vertical direction in accordance with the expansion and contraction of the fluid. A head part 110 composed of a plate 113 connected to be positioned is installed.

In addition, the rod 114 reciprocating in the axial direction according to the vertical displacement of the plate 113 is formed to pass through the second flow path 103 from the temperature sensing chamber 111 to the first flow path 102. It is provided in the communication hole 104 so that sliding is possible.

In addition, the first flow path of the expansion valve 100 is linked to the movement of the rod 114 to adjust the amount of refrigerant flowing into the inlet 4a of the evaporator 4 through the secondary heat exchange means 10. Opening and closing means 115 for adjusting the flow rate flowing through the 102 is provided.

The opening and closing means 115 is installed at the lower end of the rod 114 on the first flow path 102 and the elastic member 116 to which the elastic force acts to always keep in close contact with the rod 114 toward the head portion 110 side; The ball 117 is disposed between the end of the rod 114 and the elastic member 116 to adjust the cross-sectional area of the first flow path 102.

The expansion valve 100 configured as described above is fixedly coupled to the connection flange 120 to be described below through the bolt hole 107 formed in the main body 101.

Therefore, in the present invention, a refrigerant pipe 30 (conventional) is installed in addition to a separate connection flange 20 (conventional) in order to connect and install the expansion valve (conventional) to the secondary heat exchange means (conventional). In order to solve the inconvenience of the increase in the number of parts and assembly, such as, the bypass inlet 105 and the bypass outlet 106 is formed in the expansion valve 100 to the secondary heat exchange means (10) As the assembly can be easily installed, the refrigerant pipe 30 can be omitted in connection with the expansion valve 100 and the secondary heat exchange means 10, and the number of parts of the connection flange 120 can be reduced. Significantly reduced and simplified assembly, as well as saving installation space.

The secondary heat exchanger 200 for an air conditioner using the expansion valve 100 as described above is as follows.

7 is an exploded perspective view of an evaporator with a secondary heat exchanger according to the present invention, FIG. 8 is a front view and a side view of an evaporator with a secondary heat exchanger according to the present invention, and FIG. 9 is a cross-sectional view taken along line BB in FIG. 8. 10 is a sectional view taken along the line CC of FIG. 8, FIG. 11 is a sectional view taken along the line DD of FIG. 8, and FIG. 12 is a sectional view taken along the line EE of FIG. 8.

As shown, the secondary heat exchanger 200 of the present invention communicates with the secondary heat exchange means 10, the expansion valve 100, and the secondary heat exchange means 10 and the expansion valve 100. It consists of connecting means 140 to be connected.

First, the secondary heat exchange means 10 is bonded to one side of the evaporator (4) is made of a plurality of laminated plate 10a of approximately the same size as the plate for the evaporator (4).

The evaporator 4 plates and the thin plate 10a of the secondary heat exchange means 10 are joined to each other through a single brazing process, and the evaporator 4 plates are joined to each other to form the evaporator 4 and the thin plate 10a. ) Are bonded to each other to form a secondary heat exchange means (10).

The plate-like plate 10a forms a low pressure tank 12 and a high pressure tank 11 side by side at upper and lower ends, respectively, and communicates the low pressure passage 12c and the high pressure tank 11 communicating the low pressure tanks 12. The high pressure passage 11c is formed so as to be partitioned on each side.

That is, the high pressure tank outlet 11b communicating with the high pressure passages 11c and the low pressure tank outlet 12b communicating with the low pressure passages 12c are formed at the upper end side by side when the thin plate 10a is joined. At the lower end, the high pressure tank inlet 11a communicating with the high pressure passages 11c and the low pressure tank inlet 12a communicating with the low pressure passages 12c are formed side by side.

On the other hand, the secondary heat exchange means 10 is the same as the configuration and operation of the Korean Patent Publication No. 2002-0032812 (name: stacked secondary heat exchanger of the automotive air conditioning apparatus), which is filed by the applicant of the present invention than Detailed description will be omitted.

In addition, the connection means 140 includes a flow path plate 130 and a connection flange 120.

First, the flow path plate 130 is the bypass inlet, outlet 105, 106 of the expansion valve 100 via the connection flange 120 and the high pressure tank inlet (10) of the secondary heat exchange means (10). Connection passages 131 and 132 are formed to connect 11a) sides, respectively.

Here, the flow path plate 130 is joined to one side of the end plate 13 joined to the outer side of the secondary heat exchange means 10 to connect the first connection channel 131 and the second connection channel 132. The first connection passage 131 is coupled to the connector 121 of the connection flange 120 coupled to communicate with the bypass inlet 105 of the expansion valve 100 at one end thereof. It communicates with the high pressure tank inlet 11a side.

In addition, one end of the second connection passage 132 is coupled to the connector 123 of the connection flange 120 coupled to communicate with the bypass outlet 106 of the expansion valve 100, and the other end of the second connection passage 132. The connection pipe 133 is coupled to pass through the high pressure tank inlet 11a side of the primary heat exchange means 10 so as to communicate with the tank inlet 4a side of the evaporator 4.

That is, the connection pipe 133 is coupled in the state inserted into the high pressure tank inlet (11a) side.

In addition, the connection flange 120 is provided to connect the secondary heat exchange means 10 and the expansion valve 100 to which the passage plate 130 is bonded, and the bypass inlet 105 of the expansion valve 100 is provided. ) And a first connector 121 connecting the opening 131a of the first connection passage 131 to communicate with each other, the high pressure tank outlet 11b side of the secondary heat exchange means 10 and the expansion valve 100. And a second connector 122 connecting the first flow path 102 inlet 102a of the first channel 102 and the opening 132a of the bypass outlet 106 and the second connection channel 132 to communicate with each other. A fourth connector 123 connected to the low pressure tank outlet 12b side of the secondary heat exchange means 10 and a fourth flow path 103 inlet 103a of the expansion valve 100 in communication with each other; The connector 124 is provided.

In addition, the connection flange 120 is formed with a screw hole 125 for the bolt coupling with the expansion valve 100.

The secondary heat exchanger 200 configured as described above is assembled because the secondary heat exchange means 10, the flow plate 130, and the connecting flange 120 are integrally assembled during the brazing process of the evaporator 4 plate. The process is short and simple.

In addition, the expansion valve 100 is simply fixed to the connection flange 120 by bolts.

In addition, the bypass inlet 105 of the expansion valve 100 is connected to the refrigerant line connected to the condenser 2, the second flow path 103 of the expansion valve 100 and the refrigerant line connected to the compressor (1) Connected.

In the refrigerant flow process of the secondary heat exchanger 200 according to the present invention configured as described above, the high temperature / high pressure liquid refrigerant conveyed from the condenser 2 is passed through the bypass inlet 105 of the expansion valve 100. Flowing along the first connection passage 131 of the flow path plate 130 flows into the high-pressure tank inlet (11a) side of the secondary heat exchanger (10).

The refrigerant introduced into the high pressure tank inlet 11a flows along the high pressure flow path 11c and is discharged into the first flow path 102 of the expansion valve 100 through the high pressure tank outlet 11b. Is throttled while passing through the first flow path 102, and flows into the second connection flow path 132 of the flow path plate 130 through the bypass outlet 106. Flowing along the 132 is discharged to the inlet (4a) side of the evaporator (4).

The refrigerant introduced through the inlet 4a of the evaporator 4 performs active heat exchange with the outside air while flowing along the flow path of the respective tubes 4c, and then again through the outlet 4b of the evaporator 4. The low pressure tank inlet 12a side of the secondary heat exchange means 10 is discharged.

At this time, the low-temperature / low-pressure gas phase refrigerant introduced into the low pressure tank inlet 12a flows along the low pressure passage 12c. In this process, the high temperature / high pressure refrigerant and the thin plate type before being throttled flowing through the high pressure passage 11c. The plates 10a are heat exchanged with each other as a heat transfer medium.

That is, the liquid refrigerant in the high temperature / high pressure state is supercooled and the superheat degree of the gaseous refrigerant that is discharged from the evaporator 4 and flows into the compressor 1 is properly maintained.

Thereafter, the gaseous refrigerant that is heat-exchanged while flowing in the low pressure passage 12c is transferred to the compressor 1 through the second flow passage 103 of the expansion valve 100 through the low pressure tank outlet 12b.

Therefore, the secondary heat exchanger 200 may stabilize the flow by reducing the specific volume of the high-temperature / high pressure liquid refrigerant before being throttled, and in the refrigerant flow from the evaporator 4 to the compressor 1, It is possible to reduce the refrigerant pressure drop in 4) and to reduce the overheating area of the evaporator 4 which is set to completely vaporize the refrigerant to prevent the refrigerant 1 from flowing into the liquid refrigerant, thereby greatly improving the cooling performance of the air conditioning apparatus. It is also advantageous to the high efficiency and miniaturization of the air conditioning apparatus.

As described above, in the present invention, only the case where the expansion valve 100 is installed on one side of the secondary heat exchange means 10 via the connection means 140, but is not limited thereto, various modifications Of course, such modifications are within the scope of the present invention.

According to the present invention described above, by forming a bypass inlet and outlet in the main body of the expansion valve and installed in the secondary heat exchange means integrally bonded to one side of the evaporator via the connecting means, the structure is simple and the number of parts Significantly reduced and easy to assemble, the manufacturing cost is reduced and it is advantageous for miniaturization.

In addition, the refrigerant flowing into the evaporator is supercooled and the refrigerant discharged from the evaporator is superheated by exchanging heat and liquid between the high temperature / high pressure liquid refrigerant and the low temperature / low pressure gas phase refrigerant discharged from the evaporator before the refrigerant is circulated. It is maintained so that the refrigerant flow is stabilized, as well as the cooling performance is improved.

1 is a configuration diagram showing a cooling system of a general vehicle air conditioner;

2 is a block diagram showing a cooling system of a vehicle air conditioner equipped with a general secondary heat exchanger,

3 is an exploded perspective view of an evaporator equipped with a secondary heat exchanger of a conventional vehicle air conditioner,

4 is a front view showing a plate for a conventional secondary heat exchanger,

5 is a perspective view showing an expansion valve according to the present invention,

6 is a cross-sectional view taken along the line A-A in FIG.

7 is an exploded perspective view of an evaporator equipped with a secondary heat exchanger according to the present invention;

8 is a front view and a side view of an evaporator equipped with a secondary heat exchanger according to the present invention;

9 is a cross-sectional view taken along line B-B in FIG. 8;

10 is a cross-sectional view taken along the line C-C in FIG.

11 is a cross-sectional view taken along the line D-D in FIG. 8;

12 is a cross-sectional view taken along the line E-E in FIG. 8.

<Code Description of Main Parts of Drawing>

10: secondary heat exchange means 10a: plate

11: high pressure tank 11a: high pressure tank inlet

11b: high pressure tank outlet 11c: high pressure flow path

12: low pressure tank 12a: low pressure tank inlet

12b: low pressure tank outlet 12c: low pressure flow path

100: expansion valve 101: main body

102: first flow path 102a, 103a: inlet port

102b, 103b: outlet 103: second flow path

104: communication hole 105: bypass entrance

106: bypass outlet 107: bolt hole

108: cap 110: head

120: connection flange 121: first connector

122: second connector 123: second connector

124: fourth connector 125: screw hole

130: Euro plate 131: first connection euro

132: second connecting channel 140: connecting means

200: secondary heat exchanger

Claims (5)

A main body 101 provided with a first flow path 102 and a second flow path 103 having inlets 102a and 103a and outlets 102b and 103b; 4) the head portion 110 for reciprocating the rod 114 in the axial direction by the expansion and contraction action in accordance with the temperature change of the refrigerant flowing in the second flow path 103 and the rod 114, In the expansion valve comprising an opening and closing means 115 for adjusting the flow rate flowing in the first flow path 102 in conjunction with the movement, In the main body 101, a bypass inlet 105 is formed to allow the refrigerant transferred from the condenser 2 to flow into the secondary heat exchange means 10, and the first heat exchange means 10 passes through the first heat exchange means. The bypass outlet 106 is further formed in communication with the outlet 102b of the first flow path 102 so that the refrigerant throttled while passing through the flow path 102 can flow into the inlet 4a of the evaporator 4. Expansion valve, characterized in that. The method of claim 1, Expansion opening, characterized in that the opening of the first flow path (102) outlet (102b) is closed with a cap (108). The high pressure passage 12c and the high pressure passage 11c communicating the low pressure tanks 12 and the high pressure tanks 11 are formed on the upper and lower ends of the low pressure tank 12 and the high pressure tank 11, respectively. A plurality of plates (10a) formed to be partitioned on each side and each tank (12) (11) on one side of the evaporator (4) so as to communicate with the inlet and outlet (4a, 4b) of the evaporator (4) Secondary heat exchange means (10) integrally joined; A first flow path 102 and a second flow path 103 having inlets 102a and 103a and outlets 102b and 103b are provided and the refrigerant transferred from the condenser 2 is the secondary heat exchange means 10. The bypass inlet 105 is formed so that the refrigerant can be introduced into the evaporator 4 inlet 4a through the secondary heat exchange means 10 and through the first flow path 102. The main body 101 is formed with a bypass outlet 106 in communication with the outlet 102b of the first flow path 102 so as to be installed in the main body 101 and discharged from the evaporator 4 so that the second Head portion 110 for reciprocating the rod 114 in the axial direction by the expansion and contraction action in accordance with the temperature change of the refrigerant flowing in the flow path 103, and the first flow path in conjunction with the movement of the rod 114 An expansion valve 100 including an opening and closing means 115 for controlling a flow rate flowing through 102; Each of the tanks 12 and 11 of the secondary heat exchange means 10, the first and second flow paths 102 and 103, and the bypass inlet and outlet 105 and 106 of the expansion valve 100, respectively. Connecting means for connecting in communication (140) Secondary heat exchanger for air conditioning apparatus, characterized in that consisting of. The method of claim 3, wherein The opening of the outlet (102b) of the first flow path (102) is a secondary heat exchanger for an air conditioner, characterized in that the cap (108) is sealed. The method of claim 3, wherein The connecting means 140 is joined to one side of the secondary heat exchange means 10, one end of which is opened and the other end of the first connection passage 131 and one end communicating with the inlet 11a side of the high pressure tank 11. An opening and the other end of the flow path plate forming a second connection flow path 132 through which the connection pipe 133 is coupled to communicate with the tank of the evaporator 4 through the second heat exchange means 10; A first connector 121 connecting the bypass inlet 105 and the opening 131a of the first connection passage 131 in communication with the bypass inlet 105, an outlet 11b side of the high pressure tank 11, and the expansion valve ( The second connector 122 which connects the inlet 102a of the first flow path 102 of 100 and the opening 132a of the bypass outlet 106 and the second connection channel 132 to communicate with each other. The fourth connector 124 connecting the third connector 123 to be connected, the outlet 12b of the low pressure tank 12, and the inlet 103a of the second flow path 103 of the expansion valve 100 to communicate with each other. Connection flange 120 provided with Secondary heat exchanger for air conditioning apparatus, characterized in that consisting of.