KR101619182B1 - Liquid refrigerant supercooling device for air conditioner system of vehicle - Google Patents

Abstract

According to the present invention, since the air conditioner piping connecting the compressor and the evaporator is formed in a double pipe structure and includes the linear expansion unit mounted on the compressor side, the high-temperature and high-pressure liquid refrigerant supplied from the condenser is diverged through the linear expansion unit The temperature of the refrigerant at the inlet side of the evaporator is further lowered by maximizing the expansion of the refrigerant by using the driving flow and by supercooling the expanded liquid refrigerant through the mutual heat exchange with the low temperature low pressure gas refrigerant supplied from the evaporator to the compressor, The present invention provides a liquid refrigerant subcooling apparatus for a vehicle air conditioner system that maximizes the COP (Coefficient Of Performance) by increasing the enthalpy difference of the air conditioner system, thereby increasing the cooling performance and efficiency of the overall air conditioner system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid refrigerant subcooling apparatus for a vehicle air-

The present invention relates to a liquid coolant subcooling apparatus for a vehicle air conditioner system, and more particularly, to a liquid coolant subcooling apparatus for a vehicle air conditioner system, which is installed on an air conditioner pipe connected to a compressor and an evaporator, The present invention relates to a liquid refrigerant subcooling apparatus for a vehicle air conditioner system that maximizes the cooling performance of an air conditioning system by causing subcooling through mutual heat exchange with a gas refrigerant.

Generally, the air conditioner system of a car maintains a comfortable indoor environment by keeping the temperature of the automobile room at an appropriate temperature regardless of the temperature change of the outside.

The air conditioning system includes a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed in the compressor, an expansion valve for rapidly expanding the refrigerant condensed and liquefied in the condenser, And an evaporator that cools the air blown into a room provided with the air conditioning system using latent heat of evaporation of the evaporator.

The air conditioner system operates in accordance with a general refrigeration cycle. The refrigerant sequentially changes in phase from a high-temperature and high-pressure liquid state to a low-temperature and low-pressure gas state while sequentially repeating the components.

Here, the high-temperature and high-pressure liquid refrigerant is cooled through mutual heat exchange with the low-temperature and low-pressure gas refrigerant as described above, and the pipe through which the refrigerant moves is integrated with the condenser in terms of space utilization where the air- And the refrigerant condensed in the condenser is once again sub-cooled.

However, in the above-described conventional vehicle air-conditioning system, the refrigerant condensed in the condenser is once again sub-cooled, resulting in a complicated flow of the refrigerant and a frequent pressure drop inside the condenser inlet / outlet pipe.

In addition, when the condenser has a limited size, the length of the pipe through which the refrigerant moves is limited. If the minimum required length for reducing the refrigerant to the required temperature is not satisfied, the refrigerant can not be reduced to the required temperature The COP (Coefficient Of Performance), which is a coefficient of the cooling capacity, is lowered compared to the power required by the compressor, thereby deteriorating the overall cooling performance and efficiency of the air conditioner system.

The theoretical effect of the supercooling of the refrigerant is that when the outside temperature is 45 ° C, the temperature of the subcool refrigerant heat exchanged in the traveling section of the developed vehicle data is usually 55 ° C, It is difficult to lower the temperature of the cooling water, and the length of the cooling water must be increased infinitely to improve the cooling performance.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an air conditioner pipeline for connecting a compressor and an evaporator to a double pipe structure, Pressure refrigerant supplied from the evaporator to the compressor, and the liquid refrigerant is supplied to the low-temperature and low-pressure gas refrigerant supplied from the evaporator to the compressor So that the temperature of the refrigerant at the inlet side of the evaporator is made further lower and the enthalpy difference of the evaporator is increased to maximize the COP (Coefficient Of Performance), thereby increasing the cooling performance and efficiency of the entire air conditioner system Offers liquid refrigerant subcooling for vehicle air conditioning systems It is.

According to an aspect of the present invention, there is provided a liquid coolant subcooling apparatus for a vehicle air conditioner system, including a compressor for compressing refrigerant in a gaseous state, a condenser for condensing the compressed refrigerant into a liquid state, And an evaporator for evaporating the refrigerant expanded through the expansion valve by heat exchange with air, wherein the evaporator is installed on an air conditioner piping to which the compressor and the evaporator are connected, Temperature liquid refrigerant supplied from a condenser to a low-temperature and low-pressure gas refrigerant supplied from the evaporator to the expansion valve through a heat exchange between the refrigerant and the low-temperature low-pressure gas refrigerant supplied from the evaporator to the expansion valve, And an outer circumference of the air conditioner piping A suction pipe connected to the condenser at one side and connected to the expansion valve at the other side; And a linear expansion unit mounted between the condenser and the suction pipe so as to supply and expand the liquid refrigerant supplied from the condenser into the suction pipe, wherein the linear expansion unit is connected to the condenser, A coolant distributor for distributing the supplied liquid refrigerant into the main pipe and the auxiliary pipe, respectively; And a main mounting hole connected to the main pipe so that the liquid refrigerant flows into the suction pipe on one side of the suction pipe, And a linear expansion block having auxiliary mounting holes connected to the auxiliary pipe, respectively.

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A main connection pipe having one side connected to the condenser and the other side connected to the main pipe; And a sub connection pipe extending in the vertical direction from the main connection pipe and connected to the auxiliary pipe.

The linear expansion block is formed in a rectangular shape, and first and second through holes are formed on both sides of the air conditioning pipe and the suction pipe, the first and second through holes being connected to the mounting space.

And the second through-hole has an inner diameter equal to the inner diameter of the mounting space.

Wherein the main mounting hole includes: an insertion portion into which the main pipe is inserted; A linear expansion portion formed inside the linear expansion block at an inner diameter smaller than an inner diameter of the insertion portion; And an inclined portion connecting the insertion portion and the linear expanding portion, the inclined portion being formed so that the inner diameter decreases from the insertion portion toward the linear expanding portion.

Wherein the suction pipe surrounds an outer circumferential surface of the air conditioner pipe and has a cylindrical body portion having a peripheral surface on one side thereof inserted into a mounting space of the linear expansion block at a predetermined portion; A main refrigerant inflow hole formed at a position corresponding to the main mounting hole of the linear expansion block at one side of the body portion inserted into the linear expansion block and connected to the linear expansion portion; An auxiliary refrigerant inflow hole formed in the body portion at a position corresponding to the auxiliary mounting hole of the linear expansion block in a state of being spaced apart from the main refrigerant inflow hole; And a discharge port formed on the other side of the body and discharging the supplied liquid refrigerant to the expansion valve.

The body portion is formed to have a diameter larger than the diameter of the air conditioner pipe, and a refrigerant channel is formed in which the liquid refrigerant moves between the inner circumferential surface and the outer circumferential surface of the air conditioner pipe.

As described above, according to the liquid coolant subcooling apparatus for a vehicle air-conditioner system according to the embodiment of the present invention, since the air conditioner pipe connecting the compressor and the evaporator is formed in a double pipe structure and includes the linear expansion unit mounted on the compressor side, By expanding the high-temperature and high-pressure liquid refrigerant supplied from the condenser by the linear expansion unit, the expansion of the refrigerant can be maximized by using the generated driving flow.

Accordingly, the subcooling device according to the present embodiment allows the expanded liquid refrigerant to flow into the suction pipe and move along the refrigerant flow path, thereby subcooling the refrigerant by mutual heat exchange with the low temperature and low pressure gas refrigerant supplied from the evaporator to the compressor, Side refrigerant is further lowered and the enthalpy difference of the evaporator is increased to maximize the COP (Coefficient Of Performance), thereby improving the cooling performance of the overall air conditioner system as compared with the conventional one.

Further, by improving the cooling performance of the air conditioning system, it is possible to improve the comfort of the interior of the vehicle, thereby improving the commerciality of the vehicle and the satisfaction of the consumer. By satisfying the required temperature of the refrigerant without increasing the length of the air conditioner pipe, It is possible to reduce the size of the parts, thereby reducing the weight of the vehicle and improving the fuel economy.

Also, the non-condensing gas refrigerant remaining in the gaseous state in the liquid refrigerant flowing into the evaporator through the expansion valve is condensed by mutual heat exchange with the low-temperature gas refrigerant discharged from the evaporator, thereby preventing the cooling efficiency from being lowered by the non- condensing gas refrigerant And the expansion efficiency of the expansion valve is increased, thereby increasing the overall efficiency of the air conditioning system.

1 is a configuration diagram of a liquid coolant subcooling apparatus for a vehicular air conditioning system according to an embodiment of the present invention.
2 is a cross-sectional view of a liquid coolant subcooling apparatus for a vehicle air conditioning system according to an embodiment of the present invention.
3 is a sectional view of a linear expansion unit applied to a liquid coolant subcooling apparatus for a vehicular air conditioning system according to an embodiment of the present invention.
4 is a view for explaining the operation of a liquid coolant subcooling apparatus for a vehicular air conditioning system according to an embodiment of the present invention.
5 is an enlarged sectional view of a portion A in Fig.
FIG. 6 is a graph comparing an air conditioner cycle in which a liquid coolant subcooling apparatus for a vehicle air conditioner system according to an embodiment of the present invention is applied and a Mollier diagram in a conventional air conditioner cycle.

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

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that various equivalents and modifications may be present.

2 is a cross-sectional view of a liquid coolant subcooling apparatus for a vehicular air conditioning system according to an embodiment of the present invention, and Fig. 3 is a cross-sectional view of a liquid coolant subcooling apparatus for a vehicle air conditioner system according to an embodiment of the present invention. Sectional view of a linear expansion unit applied to a liquid coolant subcooling apparatus for a vehicular air-conditioning system according to an embodiment of the present invention.

Referring to the drawings, a liquid coolant subcooling apparatus 100 for a vehicle air conditioner system according to an exemplary embodiment of the present invention includes an air conditioner pipe 111 connecting a condenser 103 and an evaporator 107, And a linear expansion unit 130 mounted on the compressor 101 side to divide the high temperature and high pressure liquid refrigerant supplied from the condenser 103 by the linear expansion unit 130 and maximize the expansion of the refrigerant by using the drive flow .

The temperature of the refrigerant at the inlet side of the evaporator 107 is further lowered by supercooling the liquid refrigerant with the maximized refrigerant expansion through mutual heat exchange with the low temperature low pressure gas refrigerant supplied from the evaporator 107 to the compressor 101 The COP (Coefficient of Performance) is maximized to increase the cooling performance and efficiency of the entire air conditioner system, as the enthalpy difference of the evaporator 107 is increased.

1, a liquid refrigerant subcooling apparatus 100 for a vehicular air conditioning system according to an embodiment of the present invention basically comprises a compressor 101 for compressing refrigerant in a gaseous state, An expansion valve 105 connected to the condenser 103 to expand the liquid refrigerant condensed and liquefied when the liquid refrigerant is injected into small liquid particles, And an evaporator 107 for evaporating the refrigerant expanded through heat exchange with the air.

Here, the compressor 101 and the condenser 103 are connected through a refrigerant tube 109. The refrigerant tube 109 cools the compressed refrigerant supplied from the compressor 101, (103).

The liquid coolant subcooling apparatus 100 for a vehicle air conditioning system according to an embodiment of the present invention applied to such an air conditioning system is installed on an air conditioner pipe 111 to which the compressor 101 and the evaporator 107 are connected, Pressure liquid refrigerant supplied from the condenser 103 to the low-temperature and low-pressure gas refrigerant supplied from the evaporator 107 to the compressor 101 through the heat exchange between the low-temperature and low- To be supplied to the expansion valve (105).

The subcooling apparatus 100 includes a suction pipe 120 and a linear expansion unit 130 as shown in FIGS. 1 and 2. The subcooling apparatus 100 will be described in detail as follows.

The suction pipe 120 is installed on one side of the air conditioner pipe 111 while surrounding the outer circumferential surface of the air conditioner pipe 111. One end of the suction pipe 120 is connected to the condenser 103 and the other end is connected to the expansion valve 105 ).

The detailed structure of the suction pipe 120 will be described later.

The linear expansion unit 130 divides the liquid refrigerant supplied from the condenser 103 into the suction pipe 120 and supplies the liquid refrigerant to the suction pipe 120 between the condenser 103 and the suction pipe 120 Respectively.

2 and 3, the linear expansion unit 130 includes a refrigerant branch pipe 131 and a linear expansion block 141. The linear expansion unit 130 will be described in more detail with respect to each component, same.

First, the refrigerant branch pipe 131 is connected to the condenser 103 to branch the liquid refrigerant supplied from the condenser 103 into the main pipe 133 and the auxiliary pipe 135, respectively.

Here, the refrigerant branch pipe 131 has a main connection pipe 137 having one side connected to the condenser 103 and the other side connected to the main pipe 133, And a sub-connection pipe 139 connected to the auxiliary pipe 135. The sub-

The expansion block 141 has a mounting space 143 therein and is mounted on the compressor 107 in a state of being inserted into the air conditioning pipe 111 and the suction pipe 120.

The linear expansion block 141 includes a main mounting hole 145 connected to the main pipe 133 to allow the liquid refrigerant to flow into the suction pipe 120, And mounting holes 147 are formed respectively.

The first expansion block 141 is formed in a rectangular shape and has first and second through holes 149 connected to the mounting space 143 on both sides of the air conditioning pipe 111 and the suction pipe 120, , 151 may be formed.

The second through-hole 151 preferably has an inner diameter equal to the inner diameter of the mounting space 143.

In the present embodiment, the main mounting hole 145 has an insertion portion 153 into which the main pipe 133 is inserted, and an inner diameter D1 of the insertion portion 153 inside the linear expansion block 141 And the inner diameter is smaller toward the linear expanding portion 155 from the insertion portion 153 to the linear expanding portion 155. The linear expanding portion 155 is formed with a smaller inner diameter D2 than the inner expanding portion 155, And an inclined portion 157 formed to be slidably formed.

That is, the liquid refrigerant supplied to the main pipe 133 through the condenser 103 flows through the main mounting hole 145 and sequentially passes through the inserting portion 153 and the inclined portion 157 , And is expanded by the generated driving flow as the flow velocity increases while being discharged through the linear expansion portion (157).

Then, the expanded liquid refrigerant flows into the suction pipe 120 in an increased amount of refrigerant.

The liquid refrigerant flowing through the auxiliary mounting hole 147 flows through the evaporator 103 and is primarily heat-exchanged with the low-temperature low-pressure gas refrigerant moving to the air conditioning pipe 111, And is moved toward the main mounting hole 145 side.

Accordingly, the expanded liquid refrigerant flowing through the main mounting hole 145 flows into the suction pipe 147 through the auxiliary mounting hole 147 and is mixed with the lowered liquid refrigerant in the suction pipe 120, The suction pipe 111 moves toward the expansion valve 105 in a state where the overall temperature of the suction pipe 111 is lowered.

2, the suction pipe 120 includes a body 121, a main refrigerant inflow hole 123, an auxiliary refrigerant inflow hole 125, and a discharge port 127, And will be described in more detail below for each configuration.

First, the body 121 is formed in a cylindrical shape and surrounds the outer circumferential surface of the air conditioner pipe 111, and one outer circumferential surface thereof is inserted at a certain part of the mounting space 143 of the linear expansion block 141.

The body 121 is formed to have a diameter larger than the diameter of the air conditioner pipe and a coolant passage 129 is formed between the inner circumferential surface of the body part 121 and the outer circumferential surface of the air conditioner pipe 111, .

The main refrigerant inflow hole 123 is located at a position corresponding to the main mounting hole 145 of the linear expansion block 141 from one side of the body portion 121 inserted in the linear expansion block 141 And is connected to the linear expansion portion 155.

The auxiliary refrigerant inlet hole 125 is formed in the body portion 121 at a position corresponding to the auxiliary mounting hole 147 of the linear expansion block 141 while being separated from the main refrigerant inlet hole 123 .

The discharge port 127 is formed on the other side of the body 121 and discharges the liquid refrigerant that has passed through the refrigerant passage 129 to the expansion valve 105.

That is, the liquid refrigerant introduced into the body portion 121 of the suction pipe 120 through the main refrigerant inlet hole 123 and the auxiliary refrigerant inlet hole 125 passes through the refrigerant passage 129, Temperature and low-pressure gas refrigerant moving into the inside of the air conditioner pipe 111, and is discharged through the discharge port 127.

Hereinafter, the operation and operation of the liquid coolant subcooling apparatus 100 for a vehicular air conditioning system according to an embodiment of the present invention will be described in detail.

FIG. 4 is a view for explaining the operation of the liquid cooler subcooling apparatus for a vehicle air conditioning system according to the embodiment of the present invention, FIG. 5 is an enlarged sectional view of a portion A of FIG. 4, This graph compares the air conditioner cycle with the liquid refrigerant subcooling device for the air conditioner system and the Mollier diagram of the conventional air conditioner cycle.

The refrigerant is circulated through the air conditioning system in a gas or liquid state as a refrigerating cycle in which the compressor 101, the condenser 103, the expansion valve 105, the evaporator 107 and the cooling tube 109 constituting the air conditioning system are sequentially and repeatedly circulated And is continuously moved in phase change according to the cycle.

The condensed high temperature liquid refrigerant discharged from the condenser 103 passes through the branch pipe 131 of the linear expansion unit 130 as shown in FIG.

In this case, the liquid refrigerant flowing into the main connection pipe 137 of the branch pipe 131 is branched through the auxiliary pipe 139 and flows through the main pipe 133 and the auxiliary pipe 135 Respectively, into the suction pipe 120.

The liquid refrigerant that has passed through the auxiliary pipe 135 flows into the auxiliary refrigerant inlet hole 125 of the suction pipe 120 and is moved toward the main refrigerant inlet hole 123 along the refrigerant channel 129 .

At this time, the liquid refrigerant being moved is first heat-exchanged with the low-temperature and low-pressure gaseous refrigerant supplied to the inside of the air conditioner pipe 111 through the evaporator 107 so that the temperature of the liquid refrigerant is lowered, (123) side.

5, the liquid refrigerant that has passed through the main pipe 133 flows through the main mounting hole 145 and sequentially passes through the inserting portion 153 and the inclined portion 157 And is expanded by the generated driving flow as the flow velocity increases while being discharged through the linear expansion portion 157. [

Then, the expanded liquid refrigerant flows into the refrigerant passage 129 through the main refrigerant inlet hole 123 of the suction pipe 120 in an increased amount of refrigerant.

The expanded liquid refrigerant flowing through the main mounting hole 145 flows through the branch pipe 131 and flows through the auxiliary mounting hole 147 to be cooled down through the primary heat exchange, And is mixed on the refrigerant flow path 129 of the suction pipe 120.

Accordingly, the liquid refrigerant is moved toward the discharge port 127 along the refrigerant passage 129 in a state in which the overall temperature of the liquid refrigerant is lowered.

At this time, the liquid refrigerant moving along the refrigerant passage 129 is subjected to secondary heat exchange with the low-temperature and low-pressure gas refrigerant moving in the inside of the air conditioner pipe 111, The included non-condensable gas refrigerant is also condensed through heat exchange.

Accordingly, the supercooling apparatus 100 further lowers the temperature of the refrigerant at the inlet side of the evaporator 107 and increases the enthalpy difference of the evaporator 107, thereby maximizing the COP (Coefficient Of Performance) The efficiency of the air conditioning system due to the condensed gas refrigerant is prevented from lowering and the expansion efficiency of the expansion valve 105 is increased.

That is, as shown in FIG. 6, the air conditioning system to which the subcooling apparatus 100 according to the embodiment of the present invention is applied has an increased enthalpy area as compared with the conventional air conditioning system to which the subcooling apparatus 100 is not applied So that the cooling performance can be improved.

Therefore, by applying the liquid coolant subcooling apparatus 100 for a vehicle air-conditioner system according to the embodiment of the present invention configured as described above, the air conditioner pipe 111 connecting the condenser 103 and the evaporator 107 can be constructed as a double pipe structure And the linear expansion unit 130 mounted on the compressor 101 side so that the liquid refrigerant of high temperature and high pressure supplied from the condenser 103 is branched by the linear expansion unit 130, By using the driving flow, the refrigerant expansion can be maximized.

The subcooling device 100 is connected to the suction pipe 120 so that the liquid refrigerant flowing along the refrigerant flow path 129 flows from the evaporator 107 to the low temperature low pressure gas refrigerant supplied to the compressor 101 The temperature of the refrigerant at the inlet side of the evaporator 107 is further lowered and the enthalpy difference of the evaporator 107 is increased by maximizing the COP (Coefficient Of Performance) Can be improved.

Further, by improving the cooling performance of the air conditioning system, it is possible to improve the comfort of the interior of the vehicle, thereby improving the commerciality of the vehicle and the satisfaction of the consumer. By satisfying the required temperature of the refrigerant without increasing the length of the air conditioner pipe 101 , It is possible to reduce the size of each component, thereby reducing the weight of the vehicle and improving the fuel economy.

The non-condensing gas refrigerant remaining in the gaseous state in the liquid refrigerant flowing into the evaporator 107 through the expansion valve 105 is condensed through heat exchange with the low temperature gas refrigerant discharged from the evaporator 107, It is possible to prevent the cooling efficiency from being lowered by the gas refrigerant and increase the expansion efficiency at the expansion valve 105, thereby increasing the overall efficiency of the air conditioning system.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

101 ... compressor 103 ... condenser
105 ... expansion valve 107 ... evaporator
109 ... Refrigerant tube 111 ... Air conditioner piping
120 ... suction pipe 121 ... body portion
123 ... Main refrigerant inlet hole 125 ... Secondary refrigerant inlet hole
127 ... exhaust port 129 ... refrigerant flow
130 ... linear expansion unit 131 ... branching mechanism
133 ... main pipe 135 ... auxiliary pipe
137 ... main connector 139 ... auxiliary connector
141 ... linear expansion block 143 ... mounting space
145 ... Main mounting hole 147 ... Auxiliary mounting hole
149 ... first through hole 151 ... second through hole
153 ... insertion portion 155 ... linear expansion portion
157 ... inclined portion D1 ... inner diameter of the insertion portion
D2 ... inner diameter of linear expansion part

Claims (8)

A condenser for condensing the compressed refrigerant into a liquid state; an expansion valve connected to the condenser for expanding the condensed liquid refrigerant; a heat exchanger for exchanging heat with the refrigerant expanded through the expansion valve; And the evaporator is connected to the compressor and the evaporator, and the condenser and the expansion valve are connected to each other. The high-temperature and high-pressure liquid refrigerant supplied from the condenser is supplied from the evaporator to the compressor A liquid refrigerant subcooling apparatus for a vehicle air conditioner system, comprising: a subcooling device for subcooling a low-temperature and low-pressure gas refrigerant,
A suction pipe mounted on one side of the air conditioner pipe with an outer circumferential surface of the air conditioner pipe being wound therebetween, one side being connected to the condenser and the other side being connected to the expansion valve; And
And a linear expanding unit mounted between the condenser and the suction pipe to expand and supply the liquid refrigerant supplied from the condenser into the suction pipe,
The linear expansion unit
A refrigerant distribution pipe connected to the condenser and branched to flow the liquid refrigerant supplied from the condenser into the main pipe and the auxiliary pipe, respectively; And
A main mounting hole connected to the main pipe so that a liquid refrigerant flows into the suction pipe on one side of the suction pipe; A linear expansion block having auxiliary mounting holes connected to the auxiliary pipe, respectively;
Wherein the liquid coolant subcooling apparatus is a liquid coolant subcooling apparatus for a vehicle air conditioner system. delete The method according to claim 1,
The refrigerant tube
A main connection pipe having one side connected to the condenser and the other side connected to the main pipe; And
A sub connection pipe extending in the vertical direction from the main connection pipe and connected to the auxiliary pipe;
And the liquid refrigerant subcooling apparatus for a vehicle air conditioner system. The method according to claim 1,
The pre-
Wherein the first and second through holes are formed in a rectangular shape and are connected to the mounting space on both sides so that the air conditioner pipe and the suction pipe are passed through the liquid and refrigerant subcooling apparatuses. 5. The method of claim 4,
The second through-
Wherein the inner diameter of the inner space is the same as the inner diameter of the mounting space. The method according to claim 1,
The main mounting hole
An insertion portion into which the main pipe is inserted;
A linear expansion portion formed inside the linear expansion block at an inner diameter smaller than an inner diameter of the insertion portion; And
An inclined portion connecting the insertion portion and the linear expanding portion and having an inner diameter decreasing from the insertion portion to the linear expanding portion;
Wherein the liquid coolant subcooling apparatus is a liquid coolant subcooling apparatus for a vehicle air conditioner system. The method according to claim 6,
The suction pipe
A cylindrical body portion surrounding the outer circumferential surface of the air conditioner pipe and having an outer circumferential surface on one side inserted into a mounting space of the linear expansion block to a certain extent;
A main refrigerant inflow hole formed at a position corresponding to the main mounting hole of the linear expansion block at one side of the body portion inserted into the linear expansion block and connected to the linear expansion portion;
An auxiliary refrigerant inflow hole formed in the body portion at a position corresponding to the auxiliary mounting hole of the linear expansion block in a state of being spaced apart from the main refrigerant inflow hole; And
A discharge port formed on the other side of the body and discharging the supplied liquid refrigerant to the expansion valve;
Wherein the liquid coolant subcooling apparatus is a liquid coolant subcooling apparatus for a vehicle air conditioner system. 8. The method of claim 7,
The body
Wherein the refrigerant flow path is formed with a diameter larger than a diameter of the air conditioner pipe and a liquid refrigerant is moved between an inner circumferential surface of the pipe and an outer circumferential surface of the air conditioner pipe.

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