KR20110102520A - Expansion valve for an air-conditioner of a vehicle - Google Patents

Abstract

The present invention relates to an expansion valve for an air conditioner for a vehicle in which a refrigerant flowing from a condenser is throttled and supplied to an evaporator, and an opening degree is controlled by a refrigerant flowing from the evaporator and flowing out to the compressor. A first port which is formed on the first side and a second port in which the condensed refrigerant is supplied to the evaporator, and has a condensing flow path in which the refrigerant introduced into the first port is condensed; Provided is an expansion valve for an air conditioner for a vehicle including a valve body communicating with one port and having an internal flow path configured to discharge refrigerant introduced into the first port into the throttle flow path.
Therefore, since the workability of the valve body is facilitated, manufacturing is easy and cost can be reduced.

Description

Expansion valve for an air-conditioner of a vehicle {Expansion valve for an air-conditioner of a vehicle}

The present invention relates to an expansion valve for an air conditioner of a vehicle, and more particularly, to an expansion valve for an air conditioner of a vehicle that is easy to process.

Typically, a vehicle is provided with an air conditioner for providing a comfortable ride to the occupants by maintaining the indoor temperature in an appropriate state by heating or cooling the inside and outside air to enter or circulate into the interior of the vehicle. Such a vehicle air conditioner includes a cooling device for cooling the interior of a vehicle, and a heating device for heating the interior of the vehicle. The cooling device is configured to cool the interior of a vehicle by heat exchange between the evaporator and the indoor and outdoor periods while the heat exchange medium discharged by the driving of the compressor is circulated back to the compressor through the condenser, the receiver dryer, the expansion valve, and the evaporator. In contrast, the heating device is configured to heat the interior of the vehicle by introducing coolant into the heater core and exchanging heat with the outdoor air.

Recently, the L-type expansion valve is widely used as the expansion valve. Referring to FIG. 1, the L-type expansion valve 1 includes a valve body 10, a first bracket 15, and a second bracket 16. The valve body 10 has a rectangular columnar shape. The first bracket 15 serves to mount the condenser outlet pipe 11 and the compressor inlet pipe 14 to the valve body 10, and the second bracket 16 has an evaporator inlet pipe 12 and It serves to mount the evaporator outlet pipe 13 to the valve body (10). In addition, although not shown, the expansion valve (1) is connected to the condenser flow path and the condenser flow path for throttling the refrigerant flowing from the condenser outlet pipe (11) inside the valve body (10). An internal flow passage communicating with the pipe 11 is formed, and a valve chamber is formed to be connected to the driving portion deformed by the refrigerant and installed on the internal flow passage to accommodate a valve portion for controlling the opening degree of the throttle flow passage. .

However, since the valve body and the internal flow passage communicating with the condenser outlet pipe 11 and communicating with the throttle flow passage have different directions and positions in the valve main body 10, the internal structure of the valve main body is different. In addition to the complexity, in processing the inside of the valve body, the valve chamber and the internal flow path have to be processed separately, so the workability is not good.

An object of the present invention is to provide an expansion valve for an air conditioner for a vehicle, which is easy to process.

The present invention provides an expansion valve for an air conditioner for a vehicle in which a refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree is controlled by a refrigerant flowing from the evaporator and flowing out to the compressor, wherein the refrigerant is cooled from the condenser on the lower surface. And a second port formed at the first side and a first side into which the refrigerant is condensed, and the refrigerant condensed into the evaporator. An expansion valve for an air conditioner of a vehicle including a valve body formed in a line and communicating with the first port and having an internal flow path flowing out of the refrigerant introduced into the first port into the throttle flow path. Here, the valve body, 1 is formed on the first side spaced apart from the second port and the third port for the refrigerant flows from the evaporator to control the opening degree, and is formed on the second side and the third port And a fourth port through which the refrigerant introduced into the compressor flows out into the compressor. In addition, the present invention is disposed on the inner flow path, the central portion further comprises a throttle member in which a flow hole is formed so that the refrigerant flowing through the first port flows into the throttle flow path, wherein the area of the flow hole is It may be formed smaller than the area of the inner passage.

According to another aspect of the present invention, in the expansion valve for an air conditioner for a vehicle in which the refrigerant flowing from the condenser is supplied to the evaporator and the opening degree is controlled by the refrigerant flowing from the evaporator to the compressor. A first port through which the refrigerant flows from the condenser, a second side formed on the first side, and a throttled refrigerant is formed to be spaced apart from the second port on the first side, and to control the opening degree A third port through which the refrigerant flows from the evaporator, and a fourth port formed on the second side surface, and the refrigerant flowing into the third port flows out to the compressor, and the refrigerant flowing into the first port A throttling flow path to be throttled and formed in a line with the throttling flow path and in communication with the first port to flow out the refrigerant flowing into the first flow port into the throttling flow path; Is a valve body having an inner flow path, an outer circumferential surface of which is inserted into the throttle flow path, and a throttle member having a flow hole through which the refrigerant flows, a condenser outlet pipe inserted into the first port, and an evaporator inlet inserted into the second port. A first bracket for mounting the pipe, an evaporator outlet pipe inserted into the third port, a compressor inlet pipe inserted into the fourth port, the condenser outlet pipe on the bottom surface of the valve body, and the first bracket on the valve body. First fastening means fixed to the second bracket for mounting the compressor inlet pipe on the second side of the valve body, second fastening means for fixing the second bracket to the valve body, the evaporator inlet pipe and the A third bracket for mounting the evaporator outlet pipe on the first side of the valve body, and third fastening means for fixing the third bracket to the valve body. do. Here, the present invention is a sleeve coupled to the valve body and the opening to adjust the opening of the throttle flow passage, the needle coupled to the sleeve and moved by the drive unit, and installed on the inner flow path to elastically support the sleeve The valve unit may further include a valve having a support spring, and the throttle member may be disposed under the support spring to support the support spring.

In the expansion valve for an air conditioner of a vehicle of the present invention, the throttle flow path and the inner flow path formed in the valve body are formed in a row, and the valve chamber is formed in the inner flow path so that the valve chamber and the internal flow path do not need to be processed separately. Due to the ease of workability, the manufacturing is simple and the cost can be reduced.

1 is a schematic perspective view of an expansion valve for an air conditioner of a vehicle having an L-type structure.
2 is a schematic configuration diagram of an air conditioner of a vehicle according to the present invention.
3 and 4 are schematic exploded perspective views of an expansion valve for an air conditioner of a vehicle according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view schematically illustrating an internal structure of the expansion valve of FIG. 3 along the line VV of FIG. 3.
FIG. 6 is a cross-sectional view schematically illustrating an internal structure of the expansion valve of FIG. 3 according to line VI-VI of FIG. 3.
7 is a cross-sectional view showing another embodiment of the throttle member shown in FIG. 5.

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

2 is a schematic configuration diagram of an air conditioner of a vehicle according to the present invention, and FIGS. 3 and 4 are schematic perspective views of an expansion valve for an air conditioner of a vehicle according to an embodiment of the present invention. FIG. 5 is a cross-sectional view schematically illustrating the internal structure of the expansion valve of FIG. 3 along the line V-V of FIG. 3, and FIG. 6 is a schematic view of the internal structure of the expansion valve of FIG. 3 according to the VI-VI line of FIG. 3. It is a cross section showing. 7 is a cross-sectional view showing another embodiment of the throttle member shown in FIG. 5.

First, referring to FIG. 2, an expansion valve (hereinafter, referred to as “expansion valve”) 100 for an air conditioner of a vehicle according to an embodiment of the present invention throttles a refrigerant flowing from the condenser 70 to evaporator ( 80 is supplied to, and the opening degree is controlled by the refrigerant flowing from the evaporator 80 to the compressor 60, the air conditioner 50 performs the function of throttling and flow rate control. As a result of the operation of the air conditioner 80 in which the expansion valve 100 is installed, the refrigerant introduced into the compressor 60 is compressed in a state of high temperature and high pressure in the compressor 60 and then condensed in the condenser 70. do. The condensed refrigerant is throttled in the expansion valve 100, and then evaporates in the evaporator 80. The vaporized gas is introduced into the expansion valve 100 and used to control the opening degree of the expansion valve 100, and then flows back into the compressor 60. By the way, in one embodiment of the present invention is configured such that all the refrigerant flowing out of the evaporator 88 is introduced into the expansion valve 100, the present invention is not limited to this, and some of the refrigerant from the evaporator 80 Bypass may be introduced into the expansion valve (100).

3 to 7, the expansion valve 100 includes a valve unit 110, a throttle member 170, a driving unit 150, a valve unit 160, coupled to the valve body 110. The first bracket 121 and the second bracket 131 is included.

The valve body 110 has a rectangular pillar shape as a whole. However, this may have a cylindrical shape in addition to the rectangular pillar shape as an embodiment.

The lower surface 111 of the valve body 110 is formed with a first port 115 through which the refrigerant flows from the condenser 70 along the longitudinal direction (Z direction).

In addition, a second port 116 and the first side surface 112 in which the refrigerant condensed therein is supplied to the evaporator along the X direction (+) in the first side surface 112 which is the front of the valve body 110. A third port 117 is formed to be spaced apart from the second port 116, and the refrigerant flows in the X direction (−) from the evaporator outlet to control the opening degree.

In addition, a fourth port 118 is formed on the second side surface 113 of the valve body 110 to allow the refrigerant flowing into the third port 117 to flow out into the compressor along the Y direction.

Here, the first side surface 112 and the second side surface 113 are adjacent to each other, and form a perpendicular direction (X direction-Y direction) to each other.

The first port 115 is a condenser outlet pipe 181 is inserted into the refrigerant flows from the condenser outlet. The evaporator inlet pipe 182 is inserted into the second port 116 to supply refrigerant throttled by the expansion valve 100 to the evaporator inlet. The third port 117 is an evaporator outlet pipe 183 is inserted into the refrigerant flows from the evaporator outlet. The fourth port 118 is inserted into the compressor inlet pipe 184, the refrigerant flowing into the third port 117 is discharged to the compressor inlet.

5 and 6, inside the valve body 110, the valve body 110 is formed in a vertical direction (Z-axis direction) and the refrigerant flowing into the first port 115 is throttled. An internal flow passage 192 communicating with the throttle flow passage 191 and communicating with the throttle flow passage 191 and the first port 115 to discharge the refrigerant introduced into the first port 115 into the throttle flow passage 191. ) Is formed. Here, the throttle passage 191 and the inner passage 192 is formed in a line.

Meanwhile, the refrigerant flowing into the first port 115 from the condenser outlet pipe 181 is a liquid refrigerant and bubbles are included therein. The bubbles contained in the refrigerant may burst during expansion on the throttle passage 191. At this time, when the bubbles burst, the expansion valve 100 generates a loud noise.

Thus, the expansion valve 100, before the refrigerant passes through the throttle passage 191, the bubbles contained in the refrigerant in advance on the inner passage 192 in advance to make the refrigerant pass through the throttle passage 191. It is further provided with a throttle member 170 that can reduce the noise generated when.

The throttle member 170 is disposed on the inner flow passage 192, and a flow hole 171 is formed at a central portion thereof so that refrigerant introduced through the first port 115 flows to the throttle flow passage 191. It is. At this time, the area of the flow hole 171, when the refrigerant passes through the flow hole 171 to drop the pressure of the refrigerant to expand and burst bubbles contained in the refrigerant, the refrigerant is a narrow flow hole By passing the bubbles to the side walls formed around the flow hole 171 while passing through the (171), it is formed smaller than the area of the inner flow path 192 so that the bubbles contained in the refrigerant can be miniaturized. Here, the area of the flow hole 171 can be selectively adjusted according to the area of the inner passage 192 and the flow rate of the refrigerant flowing and the size of the bubble to be miniaturized, and the shape of the flow hole 171 is Polygons, including circular or hexagonal, can be various.

On the other hand, the throttle member 170 is inserted into the support spring 163 to be described later to the inner peripheral surface, and supports the support spring 163 upward. At this time, the throttle member 170 has a second screw thread 172 corresponding to the first screw thread 192a formed on the inner surface of the inner channel 192 is formed on the outer circumferential surface and screwed on the inner channel 192. Here, the throttle member 170 may move in the axial direction along the first screw thread 192a according to tightening or loosening, and the elastic force of the support spring 163 may be adjusted through the axial movement. That is, the throttle member 170 serves to adjust the set value of the valve unit by adjusting the initial elastic force (depression amount) of the support spring 163. Here, the axial movement of the throttle member 170 can be freely made depending on the flow rate of the refrigerant, the design of the expansion valve 100, and the like. In addition, the flow hole 171 of the throttle member 170 is formed in a hexagonal shape corresponding to the hexagon wrench, the operator can facilitate the screwing of the throttle member 170 through the hexagon wrench. In the present embodiment, the throttle member 170 is screwed with the first screw thread 192a formed on the inner flow path 192 to fix the position on the inner flow path 192. Of course, by forming the support jaw 172 in the internal passage 192 to fix the position of the throttle member 170.

According to the above, the expansion valve 100, first to finely refine the bubbles contained in the refrigerant passing through the flow hole of the throttle member 170, and then inserted into the throttle member 170 When passing through the supporting spring 163, the bubbles collide with the supporting spring 163 to be secondly refined to finally remove most of the bubbles included in the refrigerant. Therefore, the expansion valve 100 is a bubble contained therein by the throttle member 170 and the support spring 163 installed in the inner passage 192 before the refrigerant passes through the throttle passage 191. Since most of these bubbles are removed, the noise generated as the bubbles burst can be greatly reduced.

The drive unit 150 is coupled to the upper portion of the valve body 110, and drives using the principle of the diaphragm 151. The driving unit 150 includes a diaphragm 151, a stopper 152, a first outer case 155, and a cap 156. The diaphragm 151 is deformed by temperature, and has a characteristic of being deformed by a refrigerant flowing from the third port 117. The stopper 152 is connected to the diaphragm 151 and reciprocates in the vertical direction in accordance with the deformation of the diaphragm 151. The first outer case 155 is coupled to the upper portion of the valve body 110, the cap 156 is disposed on the upper portion to cover the first outer case 155. Here, the space between the diaphragm 151 and the first outer case 155 is an upper pressure chamber, a temperature-sensitive gas is enclosed in the upper pressure chamber 153, and the upper pressure chamber 153 is sealed. It is sealed by the member 157. A lower pressure chamber 154 is formed in the lower space of the diaphragm 151, and the stopper 152 is installed in the lower pressure chamber 154.

The valve unit 160 includes a needle 161, a sleeve 162 and a support spring 163. The needle 161 is slidably installed in the through hole 119 formed along the up and down direction of the valve body 110, and has an upper end fixed to the stopper 152 coupled with the diaphragm 151. In accordance with the movement of the diaphragm 151, the linear movement in the vertical direction. The sleeve 162 is fixed to the lower end of the needle 161 is moved in accordance with the movement of the needle 161, is installed on the throttle flow path 191 to adjust the opening degree of the throttle flow path (191). The sleeve support member 162a is integrally formed on the lower surface 111 of the sleeve 162. The support spring 163 is installed on the inner flow passage 192 and inserts the sleeve support member 162a therein from the top to elastically connect the sleeve support member 162a and the sleeve 162. Support upwards. Here, the support spring 163 has a lower portion inserted into the throttle member 170, the inner end of the throttle member 170 is disposed in contact with the lower surface of the support spring 163, the The support spring 163 is supported upward by the throttle member 170.

Therefore, the valve unit 160, when the needle 161, the upper end is coupled to the drive unit 150 and the lower end is coupled to the sleeve 162 is reciprocated in the vertical direction by the drive unit 150, the The sleeve 162 coupled with the needle 161 moves in conjunction with each other to adjust the opening degree of the throttle passage 191. At this time, the operation of the driving unit 150, when the refrigerant flows through the third port 117, the introduced refrigerant cools the temperature of the temperature gas in the upper pressure chamber 153 through the lower pressure chamber 154 The diaphragm 151 is moved by changing the temperature and by the temperature change of the temperature-sensitive gas. When the diaphragm 151 moves in this way, the stopper 152 coupled to the diaphragm 151 moves, and thus the needle 161 and the sleeve 162 move in the vertical direction, so that the throttle passage 191 The opening degree is adjusted.

On the other hand, the expansion valve 100, the through-hole 119, the throttle passage 191, the inner passage 192, and the first port 115 are aligned in the vertical direction It is arranged. Therefore, the conventional expansion valve 100 in which the internal flow path 192 and the first port 115 are disposed in different directions, respectively, separates the processing of the internal flow path 192 from the processing of the first port 115. Compared to), the expansion valve 100 can unidirectionally process the throttle flow passage 191, the internal flow passage 192, and the first port 115 to simplify the processing and reduce the processing time. It is easy to process and economical.

The first bracket 121 serves to mount the condenser outlet pipe 181 inserted into the first port 115 on the bottom surface 111 of the valve body 110. The first bracket 121 is disposed in close contact with the bottom surface 111 of the valve body 110 and fitted through the condenser outlet pipe 181. At this time, the first bracket 121 is fixed to the valve body 110 by a first fastening means 122, and the first bracket 121 is the first bracket as the first fastening means 122 are fastened The condenser outlet pipe 181 is tightly fixed to the valve body 110 by pressing the flange portion 181b. Here, the first fastening means 122 may be one or a plurality of fastening bolts which are inserted into the lower side of the valve body 110 from the outside of the first bracket 121 and screwed in.

The second bracket 131 serves to mount the compressor inlet pipe 184 inserted into the fourth port 118 to the second side 113 of the valve body 110. The second bracket 131 is disposed in close contact with the second side 113 of the valve body 110 and fitted into the compressor inlet pipe 184. At this time, the second bracket 131 is fixed to the valve body 110 by a second fastening means 132, the second bracket 131 is the second as the second fastening means 132 is fastened The compressor inlet pipe 184 is fixed to the valve body 110 by pressing the flange 184a. Here, the second fastening means 132 may be a fastening bolt that is penetrated into the first side surface 112 of the valve body 110 from the outside of the second bracket 131 to be screwed. Here, the detailed description of the first and second flange portion 184a will be described later.

The compressor inlet pipe 184 is inserted into and fixed to the fourth port 118 and extends in the outward direction (Y direction) of the second side surface 113. A second flange portion 184a is formed at an insertion end of the compressor inlet pipe 184 to protrude in a radial direction, and the second flange portion 184a is a second side surface 113 of the valve body 110. In contact with the second catching jaw (184b) formed in the role to support the compressor inlet pipe 184 in the direction of insertion.

The condenser outlet pipe 181 is inserted into the first port 115 and includes an insertion portion 181c, a bent portion 181d, an extension portion 181e, and a first flange portion 181b. Include. The insertion part 181c is inserted into and fixed upward from the lower portion of the valve body 110, and the insertion end 181a is inserted into and fixed to the internal passage 192. The extension portion 181e is formed to extend in the Y direction in parallel with the compressor inlet pipe 184. The bent portion 181d is disposed in a direction parallel to the compressor inlet pipe 184 (Y direction) and the insertion portion 181c disposed in the vertical direction (Z direction) so as to communicate with the internal flow path 192. The extension part 181e is connected to each other, and the flow direction of the refrigerant flowing from the extension part 181e is changed to the direction in which the internal flow path 192 is formed. The first flange 181b is formed to protrude in the radial direction to the insertion end 181a, and is in contact with the first catching jaw 181f formed on the lower surface 111 of the valve body 110. It serves to support the condenser outlet pipe 181 in the direction of insertion. Therefore, the condenser outlet pipe 181 extends in a curved shape so as to be parallel to the compressor inlet pipe 184, and further, the extension direction of the condenser outlet pipe 181 and the compressor outlet pipe 184, and the evaporator inlet. The extending direction of the pipe 182 and the condenser outlet pipe 181 is formed perpendicular to each other.

Here, the first and second flange portions 181b and 184a are integrally formed with the condenser outlet pipe 181 and the compressor inlet pipe 184 and are bent to protrude in a radial direction. The insertion portion 181c, the bent portion 181d, the extension portion 181e, and the first flange portion 181b have an integral structure.

The expansion valve 100 further includes a first sealing member 181 g between the condenser outlet pipe 181 and the valve body 110, and further includes the compressor inlet pipe 184 and the valve body 110. The second sealing member (184g) is further provided between the (). Here, the first and second sealing members (181g, 184g) may be applied to the conventional O-ring, etc. having the performance of the airtight, but is not limited thereto.

In addition, the expansion valve 100, the third bracket 141 for mounting the evaporator inlet pipe 182 and the evaporator outlet pipe 183 to the first side 112 of the valve body 110. The third bracket 141 is disposed in close contact with the first side 112 of the valve body 110 in parallel, and the evaporator inlet pipe 182 and the evaporator outlet pipe 183 are spaced apart in the vertical direction. It is inserted through. At this time, the third bracket 141 is fixed to the valve body 110 by a third fastening means 142, the third fastening means 142 is a third side facing the first side 112 At 114, the third bracket 141 may be a fastening bolt inserted therethrough. Although not shown, the third and fourth flange portions are formed to protrude from the insertion ends of the evaporator inlet pipe 182 and the evaporator outlet pipe 183, and the third and fourth flange portions are formed on the third bracket ( 141 and the first side 112 of the valve body 110, and a detailed description thereof includes first and second flange portions of the condenser outlet pipe 181 and the compressor inlet pipe 184 ( Since it is substantially the same as 181a, 184a, it will be omitted.

On the other hand, referring to Figure 7, the expansion valve 200 according to another embodiment of the present invention, the upper end of the insertion end (181f) of the condenser outlet pipe 181 is in contact with the lower end of the throttle member 170. It has a structure capable of supporting the throttle member 170. In this case, since the support jaw 172 of FIG. 5 does not need to be processed separately on the inner channel 192, the inner channel 192 may be more easily processed. In addition, since the same code | symbol as FIG. 6 is the same structure, it abbreviate | omits.

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 technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100,200 ... Expansion valve for vehicle air conditioner
111 ... 112 ... First side
113 ... 2nd side 115 ... 1st port
116 ... 2nd port 117 ... 3rd port
118 ... 4th port 121 ... 1st bracket
122 ... First fastening means 131 ... Second bracket
132 ... 2nd tightening means 160 ... valve part
170 ... Throttle member 171 ... Flow hole
181 ... condenser outlet piping 182 ... evaporator inlet piping
183. Evaporator outlet piping 184 ... Compressor inlet piping
191.Distant Euro 192 ... Internal Euro

Claims (22)

An expansion valve for an air conditioner for a vehicle in which a refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree is controlled by the refrigerant flowing from the evaporator and flowing out to the compressor.
A lower port having a first port through which the refrigerant flows from the condenser, a second port formed on the first side, and a throttled refrigerant supplied to the evaporator, and an throttle flow path through which the refrigerant introduced into the first port is throttled; And a valve body formed in a line with the throttle flow passage and having an internal flow passage communicating with the first port to discharge the refrigerant introduced into the first port to the throttle flow passage. . The method according to claim 1,
The valve body,
And a third port formed spaced apart from the second port on the first side and receiving refrigerant from the evaporator to control the opening degree, and a refrigerant formed on the second side and introduced into the third port. Expansion valve for an air conditioner of a vehicle having a fourth port flowing out to the. The method according to claim 1,
And a throttle member disposed on the inner flow path and having a flow hole formed at a central portion thereof so that the coolant introduced through the first port flows into the throttle flow path. The method according to claim 3,
An expansion valve for an air conditioner of a vehicle, wherein an area of the flow hole is smaller than an area of the inner passage. The method according to any one of claims 1 to 4,
Expansion valve for the air conditioner of the vehicle,
A driving unit coupled to the valve body; And
The valve further comprises a sleeve for adjusting the opening degree of the throttle flow passage, a needle coupled to the sleeve and moved by the driving unit, and a support spring installed on the inner flow passage to support the sleeve elastically. Expansion valve for air conditioner. The method according to claim 5,
The needle, one end is connected to the sleeve, the other end is connected to the drive unit is an expansion valve for an air conditioner of a vehicle reciprocating by the drive unit. The method according to claim 5 or 6,
The valve body is formed with a through hole formed in a direction perpendicular to the inside,
The needle penetrates the through hole and moves upward and downward by the driving unit.
And said through hole, said throttle flow path, said inner flow path and said first port are aligned in a vertical direction. The method according to claim 5,
The driving unit includes a diaphragm deformed by the refrigerant flowing from the third port, and a stopper connected to the diaphragm,
One end of the needle is coupled to the stopper, the expansion valve for the air conditioner of the vehicle is moved in the vertical direction by the stopper. The method according to claim 5,
The valve body has a rectangular pillar shape as a whole,
An expansion valve for an air conditioner of a vehicle, wherein the first side surface and the second side surface are adjacent to each other. The method according to claim 5,
The support spring is inserted and seated on the inner peripheral surface of the throttle member, the expansion valve for an air conditioner of a vehicle supported by the throttle member. The method according to claim 5,
The first screw thread is formed on the inner surface of the inner passage,
The throttle member has a second screw thread corresponding to the first screw thread is formed on the outer peripheral surface, the expansion valve for the air conditioner of the vehicle is screwed on the inner passage. The method of claim 11,
The throttle member moves axially along the first screw thread according to tightening or loosening,
Expansion valve for an air conditioner of a vehicle for adjusting the elastic force of the support spring in accordance with the axial movement of the throttle member. The method according to claim 11 or 12,
The flow hole of the throttle member is formed in a hexagonal shape corresponding to the hexagon wrench, the throttle member is an expansion valve for the air conditioner of the vehicle to move in the axial direction through the hexagon wrench. The method according to claim 2,
A condenser outlet pipe inserted into the first port;
A first bracket for mounting the condenser outlet pipe on a bottom surface of the valve body;
First fastening means for fixing the first bracket to the valve body;
A compressor inlet pipe inserted into the fourth port;
A second bracket for mounting the compressor inlet pipe on a second side of the valve body;
Expansion valve for an air conditioner of a vehicle further comprising a second fastening means for fixing the second bracket to the valve body. The method according to claim 14,
The condenser outlet pipe, the expansion valve for an air conditioner of a vehicle extending in the form of a curved pipe parallel to the compressor inlet pipe. The method according to claim 14,
And an extension direction of the condenser outlet pipe and the compressor outlet pipe and an extension direction of the evaporator inlet pipe and the condenser outlet pipe are perpendicular to each other. The method according to claim 14,
The first fastening means is a first fastening bolt which is screwed to the first bracket through the valve body in the lower surface,
And the second fastening means is a second fastening bolt which is screwed to the second bracket through the valve body at the second side. The method according to claim 7,
Expansion valve for the air conditioner of the vehicle,
A condenser outlet pipe inserted into the first port and having an insertion end fixed to the internal flow path; And
An expansion valve for an air conditioner for a vehicle further comprising a compressor inlet pipe having an insertion end inserted into and fixed to the fourth port. The method according to claim 14 or 18,
Expansion valve for the air conditioner of the vehicle,
A first sealing member disposed between the condenser outlet pipe and the valve body;
And a second sealing member disposed between the compressor inlet pipe and the valve body. The method according to any one of claims 14 to 17,
The first bracket and the second bracket is an expansion valve for an air conditioner of a vehicle disposed to be in close contact with the lower surface and the second side of the valve body, respectively. An expansion valve for an air conditioner for a vehicle in which a refrigerant flowing from a condenser is throttled and supplied to an evaporator, and the opening degree is controlled by the refrigerant flowing from the evaporator and flowing out to the compressor.
A first port through which the refrigerant flows from the condenser on the lower surface, a second port formed on the first side, and a throttled refrigerant is formed to be spaced apart from the second port on the first side, and to control the opening degree And a third port through which the refrigerant flows from the evaporator, and a fourth port formed on the second side surface, and the refrigerant flowing into the third port flows out into the compressor, and inside the first port. A valve body having a throttling flow path through which coolant is condensed, and an internal flow path formed in line with the throttle flow path and communicating with the first port to discharge the refrigerant introduced into the first port into the throttling flow path;
A throttle member having an outer circumferential surface fitted into the throttle passage and having a flow hole through which the refrigerant flows;
A condenser outlet pipe inserted into the first port;
An evaporator inlet pipe inserted into the second port;
An evaporator outlet pipe inserted into the third port;
A compressor inlet pipe inserted into the fourth port;
A first bracket for mounting the condenser outlet pipe on a bottom surface of the valve body;
First fastening means for fixing the first bracket to the valve body;
A second bracket for mounting the compressor inlet pipe on a second side of the valve body;
Second fastening means for fixing the second bracket to the valve body;
A third bracket for mounting the evaporator inlet pipe and the evaporator outlet pipe on the first side of the valve body; And
Expansion valve for a vehicle air conditioner comprising a third fastening means for fixing the third bracket to the valve body. The method according to claim 21,
Expansion valve for the air conditioner of the vehicle,
A driving unit coupled to the valve body; And
And a valve unit having a sleeve for adjusting the opening degree of the throttle passage, a needle coupled to the sleeve and moving by the driving unit, and a support spring installed on the inner passage to elastically support the sleeve.
The throttle member is disposed in the lower portion of the support spring expansion valve for an air conditioner of a vehicle for supporting the support spring.

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