KR20110101689A - Expansion valve for an air-conditioner of a vehicle - Google Patents

Abstract

According to an aspect of the present invention, there is provided an expansion valve for an air conditioner of 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. A first side surface having a stepped structure having a second side portion disposed to be spaced apart from the first side surface portion at a lower portion of the first side portion; A first upper surface having a second upper surface portion connecting the first side portion and the second side portion, and a second port including a second upper surface portion, formed on the second upper surface portion, and having a refrigerant flowing downward from the condenser; A second port through which the condensed refrigerant is supplied to the evaporator, a second side spaced apart from the second port, and a third port through which the refrigerant flows from the evaporator to control the opening degree, and a first side part; A valve body having a fourth port through which the refrigerant introduced into the third port flows out into the compressor, and a bracket coupled to the first side surface, and having a first communication passage communicating therewith, the side of the bracket. It is inserted and coupled, and inserted into the side of the condenser outlet pipe and the bracket for introducing the refrigerant from the condenser to the first communication flow path, and provides an expansion valve for air conditioning of the vehicle including a compressor inlet pipe for flowing out the refrigerant to the compressor. do. Therefore, workability is easy and economical.

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).

However, in the related art, the insertion ends of the condenser outlet pipe 11, the evaporator inlet pipe 12, the evaporator outlet pipe 13, and the compressor inlet pipe 14 are fixedly coupled to the valve body 10. There has been the hassle of processing to a specific shape in which the first to fourth ports are set.

An object of the present invention is to provide an expansion valve for an air conditioner for a vehicle having good processability of the valve body.

According to an aspect of the present invention, there is provided an expansion valve for an air conditioner of 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 a compressor. A first side surface having a stepped structure having a second side portion disposed below the first side portion and spaced apart from the first side portion, a first upper portion connected to an upper portion of the first side portion, and the first upper surface portion; A first upper surface including a second upper surface and a second upper surface disposed to be spaced apart and having a second upper surface connecting the first and second side portions, the second upper surface being formed in the second upper surface and having a refrigerant flowing downward from the condenser; It is formed on the first port, the second side that is introduced, and the condensed refrigerant is formed on the second side, which is spaced apart from the second port and the second port, which are supplied to the evaporator, for the control of the opening degree. A valve body having a third port through which the refrigerant flows from the evaporator, and a fourth port formed in the first side portion and the refrigerant flowing into the third port flows out to the compressor, and one side portion is provided in the first side portion. Is coupled, the first communication passage communicating with the first port is a bracket formed therein, is inserted and coupled to the side of the bracket, the condenser outlet pipe for introducing the refrigerant from the condenser to the first communication passage and the Inserted and coupled to the side of the bracket, provides an expansion valve for air conditioning of the vehicle including a compressor inlet pipe for flowing out the refrigerant to the compressor.

According to another aspect of the present invention, the present invention relates to an expansion valve for an air conditioner for a vehicle in which an opening degree is controlled by a refrigerant flowing from a condenser and supplied to an evaporator, and the refrigerant flowing from the evaporator and exiting the compressor. And a first side portion having a stepped structure having a first side portion and a second side portion spaced apart from the first side portion at an upper portion of the first side portion, and a first bottom portion connected to a lower portion of the first side portion. And a first bottom surface and a second side surface disposed to be spaced apart from the first bottom surface portion and having a second bottom surface portion connecting the first side surface portion and the second side surface portion, and formed on the first side surface portion. A first port through which the refrigerant flows downward from the second port, and a second side formed with the refrigerant condensed in the second port and spaced apart from the second port. A valve body having a third port through which the refrigerant flows from the evaporator and a fourth port formed in the second lower surface portion for controlling the opening degree, and the refrigerant flowing into the third port flows out into the compressor; One side is coupled to the first side portion, the second communication passage communicating with the fourth port is a bracket formed therein, inserted into the side of the bracket is coupled, the condenser outlet pipe for introducing the refrigerant from the condenser and It is inserted into the side of the bracket coupled to provide an expansion valve for air conditioning of the vehicle including a compressor inlet pipe for flowing out the refrigerant introduced into the second communication flow path to the compressor.

The expansion valve for the air conditioner of the vehicle of the present invention is easy and economical because it does not have to be processed in a specific shape so that the pipes into which the first, second, third and fourth ports formed in the valve body are inserted can be fixedly coupled. .

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 is a schematic exploded perspective view of an expansion valve for an air conditioner of a vehicle according to a first embodiment of the present invention.
Figure 4 is a perspective view of the expansion valve of Figure 3 assembled.
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. 4.
6 is a schematic exploded perspective view of an expansion valve for an air conditioner of a vehicle according to a second embodiment of the present invention.
Figure 7 is a perspective view of the expansion valve of Figure 6 assembled.
8 is a cross-sectional view schematically illustrating an internal structure of the expansion valve of FIG. 6 along the line VII-VII of FIG. 7.
9A to 9C are cross-sectional views schematically illustrating another embodiment of the coupling method of the bracket and the condenser outlet pipe and the compressor inlet pipe shown in FIG. 3.

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 FIG. 3 is a schematic exploded perspective view of an expansion valve for an air conditioner of a vehicle according to a first embodiment of the present invention. FIG. 4 is a perspective view of the expansion valve of FIG. 3 assembled, and FIG. 5 is a cross-sectional view schematically illustrating an internal structure of the expansion valve of FIG. 3 according to line VV of FIG. 4.

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 5, the expansion valve 100, the valve body 110, bracket 120, condenser outlet pipe 181, compressor inlet pipe 184, evaporator inlet pipe 182, Evaporator outlet pipe 183, the drive unit 150 and the valve unit 140 is coupled to the valve body 110.

The valve body 110 has a rectangular columnar shape as a whole, and a second side surface portion spaced apart from the first side surface portion 111a in the Y direction from the lower side of the first side surface portion 111a and the first side surface portion 111a. A first side surface 111 having a stepped structure having a stepped structure and spaced apart from the first upper surface portion 119b and the first upper surface portion 119b connected to an upper portion of the first side surface portion 111a. And a first upper surface 119 and a second side surface 112 including a second upper surface portion 119a arranged to connect the first side surface portion 111a and the second side surface portion 111b. Here, the first side surface 111 and the second side surface 112 are disposed adjacent to each other. Here, in the present embodiment, the valve body 110 has the rectangular pillar shape as an example, but the second side surface 112 is adjacent to the stepped first side surface 111 and the first side surface 111. Of course, if the structure is formed, it can be of various shapes such as a cylindrical shape.

The first upper surface portion 119b is coupled to the driving unit 150 to be described later, and the second upper surface portion 119a is provided with a first port 113 through which the refrigerant flows in the downward direction (Z direction). It is. The second side 112 is spaced apart from the second port 114 and the second port 114 to be supplied to the evaporator along the X direction (+) by the refrigerant introduced from the first port 113 is throttled In order to control the opening degree, a third port 115 through which the refrigerant flows in the X direction (−) from the evaporator outlet is formed. A fourth port 116 is formed in the first side portion 111a through which the refrigerant flowing from the third port 115 flows out to the compressor along the Y direction.

The first port 113 is a refrigerant flows in the downward direction from the condenser outlet pipe 181, the second port 114 is evaporator inlet pipe 182 is inserted is throttled by the expansion valve 100 Refrigerant is supplied to the evaporator inlet. The third port 115 has an evaporator outlet pipe 183 is inserted into the refrigerant flows from the evaporator outlet. The fourth port 116 flows out the refrigerant introduced from the third port 115 to the compressor inlet pipe 184.

The bracket 120 serves to mount the condenser outlet pipe 181 and the compressor inlet pipe 184 on the valve body 110, and the second upper surface portion 119a of the valve body 110. And the first side surface 111a to be in close contact with each other. The bracket 120 has a first through hole 122 through which the condenser outlet pipe 181 is inserted. The bracket 120 communicates with the first through hole 122 to the condenser. A first communication passage 124 is formed to supply the refrigerant flowing out of the outlet pipe 181 to the first port 113.

In addition, the bracket 120 has a third communication path 125 which is spaced apart from the first communication path 124 and communicates with the fourth port 116 is formed therein, the third communication path A second through hole 123 is formed in communication with the 125 and through which the compressor outlet pipe 184 is inserted. Here, the first communication passage 124 communicates with the first communication passage 124a communicating with the second through hole 123, the first communication passage 124a, and the first port 113. And a second communication path 124b formed in a lower vertical direction with respect to the first communication path 124a.

The expansion valve 100 further includes a fastening means 121 for penetrating the bracket 120 to fix the bracket 120 to the first side portion 111a of the valve body 110. Reference numeral 121 is a fastening bolt for screwing the bracket 120 to the valve body 110.

On the other hand, between the first side portion 111a and the second upper surface portion 119a of the valve body 110 and the bracket 120, the airtightness and mechanical shock or interference of the bracket 120 and the valve body 110 A gasket 160 is provided to reduce the back. The gasket 160 is bent to form an 'L' so as to correspond to the second upper surface portion 119a and the first side surface portion 111a, respectively, and has a first through-hole corresponding to the surface corresponding to the second upper surface portion 119a. A hole 161 is formed to introduce a refrigerant flowing out of the condenser outlet pipe 181, and a second through hole 162 is formed at a surface corresponding to the first side portion 111a to form the compressor inlet pipe 184. To the refrigerant. Here, the area of the first through hole 161 may be smaller than the area of the second communication path 124b and the first flow path part 117a to be described later to reduce the noise of the expansion valve 100. Detailed description thereof will be described later.

A first flange portion 181a is formed at a front portion of the condenser outlet pipe 181 to protrude in a radial direction, and a second flange portion 184a is formed at a front portion of the compressor inlet pipe 184 in a radial direction. ) Is formed. Thus, the expansion valve 100, when the condenser outlet pipe 181 is inserted into the first through hole 122, the first flange portion 181a is the first through hole 122 of the bracket 120 The position is fixed by the periphery of the), and when the compressor inlet pipe 184 is inserted into the second through hole 123, the second flange portion 184a is the second through hole of the bracket 120 It is hooked around 123 and its position is fixed.

Here, the expansion valve 100, the first O-ring 181b disposed between the first flange portion 181a and the bracket 120, the second flange portion 184a and the bracket 120 A second O-ring 184b is disposed between the bracket 120 to maintain airtightness between the bracket 120 and the first flange portion and the second flange portions 181a and 184a.

The expansion valve 100 includes a second bracket 130 for mounting the evaporator inlet pipe 182 and the evaporator outlet pipe 183 on the second side 112 of the valve body 110, The second bracket 130 is disposed in close contact with the second side 112 of the valve body 110 in parallel and is inserted through the evaporator inlet pipe 182 and the evaporator outlet pipe 183 spaced apart in the vertical direction. It is. At this time, the second bracket 130 is fixed to the valve body 110 by the second fastening means 131, the second fastening means 131 is the second bracket 130 on the second side (112) It can be used as a fastening bolt inserted through). Although not shown, 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 parts are formed on the second bracket ( Located between 130 and the second side 112 of the valve body 110, a detailed description thereof will be omitted because it is substantially the same as the first and second flange portions (181a, 184a).

Referring to FIG. 5, the valve body 110 is formed in the vertical direction (Z-axis direction) of the valve body 110, and the refrigerant introduced into the first port 113 is throttled to adjust the opening degree. The throttling passage 118, which is in communication with the throttling passage 118 and the first port 113, changes the flow direction of the refrigerant introduced into the first port 113 to the throttling passage 118. The first inner flow passage 117 that flows out is formed. Here, the first internal passage 117 includes a first passage portion 117a and a second passage portion 117b. The first flow path portion 117a is formed to be bent so as to communicate with the first port 113, one end portion extending in the vertical direction (Z direction) and the other end portion extending in the inner direction (Y direction). The flow path part 117b communicates with the first flow path part 117a and the throttle flow path 118 and is formed to extend in the vertical direction. Therefore, the coolant introduced through the first port 113 flows downward through the first flow path 117a and then changes in a flow direction inward, and passes through the second flow path 117b. The flow direction is changed again upward and flows into the throttle passage 118.

Meanwhile, the refrigerant flowing into the first port 113 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 118. At this time, when the bubbles burst, the expansion valve 100 generates a loud noise.

Accordingly, before the refrigerant passes through the throttle passage 118, the expansion valve 100 refines the bubbles included in the refrigerant on the first inner passage 117 to allow the refrigerant to open the throttle passage 118. The noise generated when passing can be reduced. In detail, the expansion valve 100 firstly bends the first flow path 117a of the first internal flow path 117 so that the refrigerant containing the bubble is formed in the first flow path 117a. By passing the impingement to pass through the micronized bubbles, and then passing through the support spring 143 installed in the second flow path portion 117b to make the bubbles to be further refined by hitting the support spring (143). In addition, the expansion valve 100 not only refines the bubbles by the first internal flow path 117, but also the area of the first through hole 161 of the gasket 160 as described above. It is formed smaller than the area of the communication path (124b) and the first port 113 to reduce the pressure of the refrigerant contained in the refrigerant when the refrigerant containing the bubble passes through the first through hole 161 The bubbles expand and burst, and the refrigerant passes through the narrow first through hole 161 and strikes the bubbles on the side wall formed around the first through hole 161 to refine the bubbles contained in the refrigerant. Can be. Here, the area of the first through hole 161 of the gasket 160 can be selectively adjusted according to the flow rate of the flowing refrigerant and the size of the bubble to be miniaturized, and the shape of the first through hole 161 is Polygons, including circular or hexagonal, can be various.

The driving unit 150 is coupled to the first upper surface portion 119b of the valve body 110 and is driven using the principle of a diaphragm. The driving unit 150 includes a diaphragm 151, a stopper 152, a first outer case 153, and a cap 155. The diaphragm 151 is deformed by temperature, and has a characteristic of being deformed by a refrigerant flowing from the third port 115. 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 153 is coupled to the upper portion of the valve body 110, the cap 155 is disposed on the upper portion to cover the first outer case 153. Here, the space between the diaphragm 151 and the first outer case 153 is an upper pressure chamber 156, a temperature-sensitive gas is enclosed in the upper pressure chamber 156, the upper pressure chamber 156 ) Is sealed by the sealing member 154. A lower pressure chamber 157 is formed in the lower space of the diaphragm 151, and the stopper 152 is installed in the lower pressure chamber 157.

The valve unit 140 includes a needle 141, a sleeve 142, a support spring 143, and a support member 145. The needle 141 is slidably installed in the insertion hole 146 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 142 is fixed to the lower end of the needle 141 is moved in accordance with the movement of the needle 141, is installed on the throttle flow path 118 to adjust the opening degree of the throttle flow path (118). The sleeve support member 144 is integrally formed on the lower surface of the sleeve 142. The support spring 143 is installed on the first inner flow path 117 in detail on the second flow path part 117b and inserts the sleeve support member 144 therein from the top to support the sleeve. The member 144 and the sleeve 142 are elastically supported upward. Here, the support spring 143 is upwardly supported by the support member 145 disposed below. The valve unit 140 of the above configuration, when the needle 141, the upper end is coupled to the drive unit 150 and the lower end is coupled to the sleeve 142 is reciprocated in the vertical direction by the drive unit 150 The sleeve 142 coupled to the needle 141 moves in conjunction with each other to adjust the opening degree of the throttle passage 118. At this time, the operation of the driving unit 150, when the refrigerant flows through the third port 115, the refrigerant introduced into the temperature-sensitive gas in the upper pressure chamber 156 through the lower pressure chamber 157. 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 141 and the sleeve 142 move in the up and down direction, so that the throttle passage 118 The opening degree is adjusted.

On the other hand, the first side surface 111 and the second side surface 112 of the valve body 110 are adjacent to each other to form a perpendicular direction (X direction-Y direction) to each other. In addition, the direction in which the refrigerant flows into the condenser outlet pipe 181 and the direction in which the refrigerant flows into the compressor inlet pipe 184 are parallel to each other, and the compressor inlet pipe 184 is connected to the condenser outlet pipe 181. It is located at the top. Therefore, the direction in which the refrigerant flows into the condenser outlet pipe 181 and the direction in which the refrigerant flows out of the compressor inlet pipe 184 may include a direction in which the refrigerant flows out into the second port 114 and the third port ( 115 is a direction perpendicular to the direction in which the refrigerant is introduced.

FIG. 6 is a schematic exploded perspective view of an expansion valve for an air conditioner of a vehicle according to a second embodiment of the present invention, FIG. 7 is a perspective view of the expansion valve of FIG. 6 assembled, and FIG. 6 is a cross-sectional view schematically showing the internal structure of the expansion valve of FIG.

6, the expansion valve 200 according to the second embodiment of the present invention, compared to the expansion valve 100 according to the first embodiment of Figure 3 bracket 220 of the valve body 210 As a case where it is coupled so as to be located below the second lower surface portion 219b, a description will be given focusing on a different configuration from FIG.

First, the valve body 210 includes a first side portion 211a and a second side portion 211b disposed to be spaced apart from the first side portion 211a in the Y direction at an upper portion of the first side portion 211a. And a first side surface 211 having a stepped structure and spaced apart in the Z direction from the first lower surface portion 219a and the first lower surface portion 219a connected to the lower side of the first side surface portion 211a. And a second bottom surface 219 and a second side surface 212 including a second bottom surface portion 219b connecting the first side surface portion 211a and the second side surface portion 211b.

Here, a first port 213 through which the refrigerant flows from the condenser is formed in the first side portion 211a, and a second port 214 through which the throttled refrigerant is supplied to the evaporator on the second side surface 212. And a third port 215 formed to be spaced apart from the second port 214 and into which the refrigerant flows from the evaporator to control the opening degree, and the third lower surface part 219b is provided with the third port 215b. A fourth port 216 is formed in which the refrigerant flowing into the port 215 flows downward and is supplied to the compressor.

The bracket 220 is closely coupled to the first side portion 211a and the second lower surface portion 219b, and a second communication passage 127 communicating with the fourth port 216 is formed therein. The fourth communication passage 126 is formed to communicate with the first port 113 so as to be spaced downward from the second communication passage 127.

The inside of the valve body 210, the refrigerant flowed into the first port 113 is throttled, the throttle passage 218, the opening degree is controlled, and the first port 113 is in communication with, the first A second internal flow passage 217 is formed to change the flow direction of the refrigerant introduced into the port 113 and flow out of the throttle flow passage 218. The second internal passage 217 includes a third passage portion 217a and a fourth passage portion 217b. The third flow path part 217a is formed to communicate with the first port 113 and extend in an inward direction (Y direction), and the second flow path part 117b is formed in the first flow path part 117a and the In communication with the throttle passage 218 is formed to extend in the vertical direction and has a built-in valve unit 140. Therefore, the refrigerant flowed in through the third flow path portion 217a in the inward direction through the first port 213 passes through the fourth flow path portion 217b and the flow direction is changed in the inward direction. 218 flows into. In this case, the third channel 217a is formed at a position eccentric with respect to the fourth communication channel 126 so that the refrigerant in the fourth communication channel 126 changes its flow direction. It is to be introduced into the third flow path portion 217a. In this case, when the coolant flows from the fourth communication passage 126 to the third passage portion 217a, the refrigerant hits the side wall and has a third passage portion 217a smaller than the area of the fourth communication passage 126. Since passing through it, it is possible to effectively remove the bubbles contained therein.

9A to 9C are cross-sectional views schematically showing another embodiment of the coupling method of the bracket 120, the condenser outlet pipe 181 and the compressor inlet pipe 184 shown in FIG.

First, referring to FIG. 9A, as shown in FIGS. 3 and 6, the expansion valve includes first and second flange portions 181a and 184a in the condenser outlet pipe 181 and the compressor inlet pipe 184, respectively. Unlike the first and second flange portions 181a and 184a, the condenser outlet pipe 181b and the compressor inlet pipe 184a are not formed by being combined with the bracket 120 to form a bracket ( Through and inserted into the first and second through holes 322 and 323 of 320, welding is performed externally along the first and second through holes 322 and 323 so that the condenser outlet pipe 181b and the compressor inlet pipe 184a are provided. And the bracket 320 are combined with each other. In this case, since the welding part 185 is formed by fixing the condenser outlet pipe 181b and the compressor inlet pipe 184a to the bracket 320 by welding, the compressor is welded once. Although the inlet pipe 184a and the condenser outlet pipe 181b are not easily exchanged, the compressor inlet pipe 184a and the condenser outlet do not need to be processed in the first and second flange portions 181a and 184a. The processing of the pipe 181b is easy.

Referring to FIG. 9B, the expansion valve is a case in which the compressor inlet pipe 184b is directly inserted into the fourth port 316. Referring to FIG. 9C, the expansion valve of the condenser outlet pipe 181c and the compressor inlet pipe 184c is used. Steps 341 and 342 are respectively formed at the insertion ends and inserted into the bracket 340. 6 to 9C, the same reference numerals as those shown in Figs. 3 to 5 are the same, and detailed descriptions thereof are omitted.

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 110,210 ... Valve body
111,211 ... first side 111a, 211a ... first side
111b, 211b ... second side 112,212 ... second
113,213 ... Port 1 114,214 ... Port 2
115,215 ... 3rd port 116,216 ... 4th port
117 ... the first internal passage 117a ... the first internal passage
117b ... Second Eurozone 118,218
120,220,320,330,340 ... Bracket 121 ... Fasteners
122,222 ... First through hole 123,223 ... Second through hole
124 ... first communication route 124a ... first communication route
124b ... 2nd Communication Channel 126 ... 4th Communication Channel
127 ... 2nd Passage Euro 130 ... 2nd Bracket
131 ... 2nd fastening means 140 ... valve part
150 ... drive 160,260 ... gasket
161,261 ... First Through Hole 162,262 ... Second Through Hole
181,181b ... Condenser outlet piping 181a, 181c ... 1st flange part
182 ... evaporator inlet piping 183 ... evaporator outlet piping
184,184a, 184b ... Compressor Inlet Piping 184a ... 2nd Flange
217 ... Second Internal Euro 217a ... Third Euro
217b ... Fourth Euro 220 ... Third Bracket

Claims (18)

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 side portion having a stepped structure having a first side portion and a second side portion disposed below the first side portion and spaced apart from the first side portion, and a first upper surface portion connected to an upper portion of the first side portion; A condenser formed on the second upper surface and including a first upper surface and a second upper surface, the first upper surface being spaced apart from the first upper surface and having a second upper surface portion connecting the first and second side portions; The first port and the second side in which the refrigerant flows in a downward direction from the second port is formed in the second side and the second port is supplied to the evaporator, the second port is spaced apart from the second port and the control of the opening degree A valve body having a third port through which the refrigerant flows from the evaporator, and a fourth port formed in the first side portion and into which the refrigerant flowing into the third port flows out into the compressor;
A bracket having one side coupled to the first side portion and having a first communication passage communicating therein with the first port;
A condenser outlet pipe inserted into the side of the bracket and coupled to the condenser, for introducing refrigerant from the condenser into the first communication passage; And
Is inserted into the side of the bracket and coupled, the expansion valve for air conditioning of the vehicle comprising a compressor inlet pipe for flowing out the refrigerant to the compressor. 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 side portion having a stepped structure having a first side portion and a second side portion disposed above the first side portion and spaced apart from the first side portion, and a first bottom portion connected to a lower portion of the first side portion; A bottom surface including a second bottom surface and a second bottom surface disposed to be spaced apart from the first bottom surface and connecting the first side surface portion and the second side surface portion, and formed on the first side surface portion, and a refrigerant from the condenser. The first port flowing in the downward direction is formed on the second side, and the refrigerant condensed is formed on the second side spaced apart from the second port, the second port is supplied to the evaporator and the evaporator for the control of the opening degree A valve body having a third port through which the refrigerant flows from the second port, and a fourth port formed in the second lower surface portion and the refrigerant flowing into the third port flowing out into the compressor;
A bracket having one surface coupled to the first side portion and having a second communication passage communicating therein with the fourth port;
A condenser outlet pipe inserted into the side of the bracket and coupled to the refrigerant to introduce refrigerant from the condenser; And
Inserted and coupled to the side of the bracket, the expansion valve for air conditioning of a vehicle comprising a compressor inlet pipe for flowing out the refrigerant introduced into the second communication flow path to the compressor. The method according to claim 1 or 2,
The valve body has a rectangular pillar shape as a whole,
And said first and second side surfaces are adjacent to each other. The method according to claim 1 or 2,
The bracket is mounted to the valve body to the condenser outlet pipe and the compressor inlet pipe,
The expansion valve for the air conditioner of the vehicle further includes a fastening means for fixing the bracket to the valve body, wherein the fastening means includes a fastening bolt that is screwed to the first side surface through the bracket. Expansion valve for air conditioning equipment. The method according to claim 4,
The bracket includes a first through hole through which the condenser outlet pipe is inserted and a second through hole through which the compressor inlet pipe is inserted.
The air conditioning expansion valve of the vehicle,
After the condenser outlet pipe is fitted into the first through hole, the bracket and the condenser outlet pipe are welded to each other along the first through hole, and after the compressor outlet pipe is fitted into the second through hole, 2. An air conditioning expansion valve for a vehicle for welding the second bracket and the compressor inlet pipe to each other along a through hole. The method according to claim 4,
The bracket includes a first through hole through which the condenser outlet pipe is inserted and a second through hole through which the compressor inlet pipe is inserted.
The first flange portion is formed in the front portion of the condenser outlet pipe in a radial direction, the second flange portion is formed in the front portion of the compressor inlet pipe in a radial direction,
In the expansion valve for air conditioning of the vehicle, when the first flange portion is inserted into the first through hole, the first flange portion is caught by an inner surface of the bracket to fix a position, and the second flange portion passes through the second through portion. When inserted into the hole, the expansion valve for an air conditioner of a vehicle for fixing the position by hanging the inner side of the bracket. The method of claim 6,
Expansion valve for the air conditioner of the vehicle,
A first O-ring disposed between the first flange portion and the bracket,
An expansion valve for an air conditioner of a vehicle, further comprising a second o-ring disposed between the second flange portion and the bracket. The method according to claim 1,
The bracket is formed with a second through hole through which the compressor inlet pipe is inserted.
And a front portion of the compressor inlet pipe passing through the bracket through the second through hole and fixedly coupled to the fourth port. The method according to claim 8,
The expansion valve for the air conditioner of the vehicle further includes a fastening means for fixing the bracket to the first side portion,
The fastening means is an expansion valve for a vehicle air conditioner comprising a fastening bolt that is screwed through the bracket to the first side portion. The method according to claim 1,
Inside the valve body,
A coolant flowing into the first port is throttled and a throttle flow path of which opening degree is controlled;
An expansion valve for an air conditioner of a vehicle having a first internal flow path communicating with the first port and changing a flow direction of the refrigerant flowing into the first port and flowing out to the throttle flow path. The method according to claim 10,
The throttle passage extends in the vertical direction,
An expansion valve for an air conditioner for a vehicle in which a refrigerant flowing in a downward direction through the first port is changed in an inward direction in the first internal passage and flows out into the throttle passage. The method according to claim 2,
Inside the valve body,
A coolant flowing into the first port is throttled and a throttle flow path of which opening degree is controlled;
And a second internal flow path communicating with the first port and configured to guide the refrigerant flowing into the first port and to flow out of the throttle flow path. The method according to any one of claims 10 to 12,
The direction in which the refrigerant flows into the condenser outlet pipe and the direction in which the refrigerant flows into the compressor inlet pipe are parallel to each other,
The compressor inlet pipe is an expansion valve for an air conditioner of a vehicle located above the condenser outlet pipe. The method according to claim 13,
The direction in which the refrigerant flows into the condenser outlet pipe and the direction in which the refrigerant flows into the compressor inlet pipe are perpendicular to the direction in which the refrigerant flows into the second port and the direction in which the refrigerant flows into the third port. Expansion valve for air conditioner. The method according to claim 1 or 2,
Expansion valve for an air conditioner of a vehicle further comprising a gasket disposed between the valve body and the bracket. The method according to claim 1 or 2,
The bracket is an expansion valve for an air conditioner of a vehicle disposed to be in close contact with each of the valve body. 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.
It has a rectangular column shape as a whole, and has a first side portion and a second side portion disposed below the first side portion and spaced apart from the first side portion, the first side having a stepped structure and an upper portion of the first side portion. A first upper surface portion connected to the first upper surface portion and a first upper surface portion spaced apart from the first upper surface portion and having a second upper surface portion connecting the second side surface portion, and a second side surface, and the second side surface. The first port is formed in the upper surface portion and the first port, the refrigerant flows in the downward direction from the condenser is formed on the second side and the second port is axially spaced apart from the second port, the refrigerant is supplied to the evaporator And a third port formed with a third port through which the refrigerant flows from the evaporator for controlling the opening degree, and a fourth port formed with the first side portion and with the refrigerant introduced into the third port flowing out into the compressor. The body;
A bracket coupled to the first side portion, the first through hole and the second through hole being formed on an outer surface thereof, and having a first communication passage communicating therein with the first port;
A condenser outlet pipe which is inserted into and coupled to the first through hole of the bracket and introduces refrigerant from the condenser into the first communication passage;
An evaporator inlet pipe 182 inserted into the second port;
An evaporator outlet pipe inserted into the third port;
A compressor inlet pipe inserted into and coupled to a second through hole of the bracket to allow refrigerant to flow out of the compressor; And
It includes a fastening means for fixing the bracket to the valve body,
Inside the valve body,
A throttling passage extending in an up and down direction, in which a refrigerant introduced in a downward direction through the first port is throttled, and an opening degree is controlled;
And a first internal flow path communicating with the first port and into which the refrigerant flowing downward through the first port is changed inward and flows out into the throttle flow path. 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.
It has a rectangular column shape as a whole, and has a first side portion and a second side portion disposed to be spaced apart from the first side portion at an upper portion of the first side portion and having a stepped structure, and a lower portion of the first side portion. A first bottom surface and a second bottom surface disposed to be spaced apart from the first bottom surface portion and having a second bottom surface portion connecting the first side surface portion and the second side surface portion, and a second side surface, the first side surface comprising: It is formed in the side portion and formed in the first port, the second side in which the refrigerant flows from the condenser in the downward direction, the second port and the condensed refrigerant is supplied to the evaporator, formed in the second side spaced apart from the second port And a third port through which the refrigerant flows from the evaporator and a fourth port formed in the second lower surface portion for controlling the opening degree, and a fourth port through which the refrigerant flowing into the third port flows out into the compressor. The body;
A bracket which is coupled to the first side portion, a third through hole and a fourth through hole are formed on an outer surface thereof, and a second communication passage communicating with the fourth port is formed therein;
A condenser outlet pipe that is inserted into and coupled to the first through hole of the bracket and introduces refrigerant from the condenser;
An evaporator inlet pipe inserted into the second port;
An evaporator outlet pipe inserted into the third port;
A compressor inlet pipe inserted into and coupled to a second through hole of the bracket to allow the refrigerant introduced into the second communication passage to flow out into the compressor; And
It includes a fastening means for fixing the bracket to the valve body,
Inside the valve body,
The refrigerant flowing into the first port is throttled, and the throttling flow path of which the opening degree is controlled, and the second internal flow passage communicating with the first port to guide the refrigerant introduced into the first port and flow out into the throttling flow path. Is formed,
And a direction in which the refrigerant flows into the condenser outlet pipe and a direction in which the refrigerant flows into the second internal flow path are different from each other so that the flow direction of the refrigerant changes.

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