WO2022244476A1

WO2022244476A1 - Valve device and air conditioning device

Info

Publication number: WO2022244476A1
Application number: PCT/JP2022/014739
Authority: WO
Inventors: 広司海沼
Original assignee: 株式会社不二工機
Priority date: 2021-05-18
Filing date: 2022-03-25
Publication date: 2022-11-24

Abstract

[Problem] To provide a valve device and an air conditioning device with which leakage of a refrigerant can be suppressed and the number of components can be reduced. [Solution] A valve device 10 has one valve body 100 having a plurality of refrigerant passages, and a plurality of valve units mounted to the valve body 100. The plurality of refrigerant passages include an entrance passage 110 connected to an entrance opening 171 in a front surface 101 of the valve body 100, an exit passage 120 connected to an exit opening 172 in a rear surface 102 of the valve body 100, a refrigerant expansion passage 130 connecting the entrance passage 110 and the exit passage 120, and a bypass passage 140 connecting the entrance passage 110 and the exit passage 120. The plurality of valve units include an expansion valve unit 200 capable of changing the passage area of the refrigerant expansion passage 130, a first opening/closing valve unit 300 capable of opening and closing the refrigerant expansion passage 130, and a second opening/closing valve unit 400 capable of opening and closing the bypass passage 140.

Description

valve gear and air conditioning

The present invention relates to valve devices and air conditioners.

An example of a conventional vehicle air conditioner is disclosed in Patent Document 1. The vehicle air conditioner of Patent Document 1 includes a compressor, an indoor condenser, an outdoor heat exchanger, an indoor evaporator, an accumulator, a first expansion valve, a second expansion valve, and a first on-off valve. , a second on-off valve, and a check valve. Further, the vehicle air conditioner has a first refrigerant passage, a second refrigerant passage, a third refrigerant passage, and a bypass passage.

The discharge port of the compressor is connected to the inlet of the indoor condenser. The first refrigerant passage connects the outlet of the indoor condenser and the inlet of the outdoor heat exchanger. The second refrigerant passage connects the outlet of the outdoor heat exchanger and the inlet of the accumulator. The third refrigerant passage connects the outlet of the outdoor heat exchanger and the inlet of the indoor evaporator. The outlet of the indoor evaporator is connected with the inlet of the accumulator. The outlet of the accumulator is connected with the suction port of the compressor.

The first expansion valve can change the passage area of the first refrigerant passage. The first on-off valve can open and close the second refrigerant passage. The second expansion valve can change the passage area of the third refrigerant passage. The check valve is arranged between the outlet of the outdoor heat exchanger and the second expansion valve in the third refrigerant passage. The check valve allows refrigerant to flow from the outlet of the outdoor heat exchanger to the second expansion valve. The check valve inhibits the flow of refrigerant from the second expansion valve to the outlet of the outdoor heat exchanger.

The bypass passage connects a portion of the first refrigerant passage between the outlet of the indoor condenser and the first expansion valve and a portion of the third refrigerant passage between the check valve and the second expansion valve. there is The second on-off valve can open and close the bypass passage.

JP 2015-77816 A

However, in the vehicle air conditioner described above, the first on-off valve is connected to the pipe via a connector. The first expansion valve, the second on-off valve, and the check valve are also connected to piping or the like via connectors. Therefore, the vehicle air conditioner has many connection points, and has a problem that the possibility of leakage of the refrigerant increases. Moreover, since the vehicle air conditioner has a connector, the number of parts and assembly man-hours are large, and there is a problem that the manufacturing cost is increased.

Therefore, an object of the present invention is to provide a valve device capable of suppressing refrigerant leakage and reducing the number of parts, and an air conditioner having this valve device.

In order to achieve the above object, a valve device according to one aspect of the present invention includes:
one valve body having a plurality of refrigerant passages;
a plurality of valve units attached to the valve body;
the plurality of refrigerant passages,
an inlet passage connected to an inlet opening located on the outer surface of the valve body;
an outlet passage connected to an outlet opening located on the outer surface of the valve body;
a refrigerant expansion passage connecting the inlet passage and the outlet passage;
a bypass passage connecting the inlet passage and the outlet passage;
The plurality of valve units are
an expansion valve unit capable of changing the passage area of the refrigerant expansion passage;
a first on-off valve unit capable of opening and closing the refrigerant expansion passage;
and a second on-off valve unit capable of opening and closing the bypass passage.

In the present invention,
the plurality of refrigerant passages further includes passage passages,
the passageway connects a passage inlet opening disposed on the outer surface of the valve body and a passage outlet opening disposed on the outer surface of the valve body;
It is preferable that the expansion valve unit changes the passage area of the refrigerant expansion passage according to the temperature of the refrigerant flowing through the passage.

In the present invention,
The plurality of valve units is a check valve unit that allows refrigerant to flow from the passage inlet opening to the passage outlet opening in the passage passage and inhibits refrigerant flow from the passage outlet opening to the passage inlet opening. is preferably further included.

In the present invention,
the inlet opening is located on a planar first outer surface of the valve body;
the outlet opening is located on a planar second outer surface parallel to the first outer surface of the valve body;
the entrance passage has a columnar shape extending linearly from the entrance opening in a direction normal to the first outer surface;
the outlet passage has a columnar shape extending linearly from the outlet opening in the normal direction of the second outer surface;
An imaginary plane containing the centerline of the inlet passage and the centerline of the outlet passage is non-parallel to a planar third outer surface perpendicular to the first outer surface of the valve body and non-parallel to the valve body. It is preferably non-parallel to a planar fourth outer surface perpendicular to the first and third outer surfaces.

In the present invention,
the inlet opening is located on a planar first outer surface of the valve body;
the entrance passage has a columnar shape extending linearly from the entrance opening in a direction normal to the first outer surface;
the bypass passage has a pillar-shaped valve chamber in which the valve body of the second on-off valve unit is arranged;
A portion of the valve chamber preferably overlaps the inlet passage.

In order to achieve the above object, an air conditioner according to another aspect of the present invention includes:
An air conditioner comprising a compressor, an indoor condenser, an indoor evaporator, an outdoor heat exchanger, a check valve, a flow control valve, an on-off valve, and the valve device,
a discharge port of the compressor is connected to an inlet of the indoor condenser;
The outlet of the indoor condenser is connected to the inlet of the indoor evaporator via the check valve and the flow control valve,
the inlet opening is connected to the outlet of the indoor evaporator;
the outlet opening is connected to the inlet of the outdoor heat exchanger;
the passage inlet opening is connected to the outlet of the outdoor heat exchanger;
the passage outlet opening is connected to the suction port of the compressor;
The outlet of the indoor evaporator and the suction port of the compressor are connected via the on-off valve.

In the present invention,
the inlet opening and the passage outlet opening are arranged on one outer surface;
Preferably, said outlet opening and said through-entry opening are arranged in one other outer surface.

The valve device and air conditioner of the present invention have one valve body having a plurality of refrigerant passages and a plurality of valve units attached to the valve body. A plurality of refrigerant passages connect the inlet passages connected to the inlet openings disposed on the outer surface of the valve body, the outlet passages connected to the outlet openings disposed on the outer surface of the valve body, and the inlet passages and the outlet passages. and a bypass passage connecting the inlet passage and the outlet passage. The plurality of valve units includes an expansion valve unit capable of changing the passage area of the refrigerant expansion passage, a first on-off valve unit capable of opening and closing the refrigerant expansion passage, and a second on-off valve unit capable of opening and closing the bypass passage. I'm in. Because of this configuration, the inlet passage, the outlet passage, the refrigerant expansion passage, and the bypass passage are connected inside the valve body, and the expansion valve unit changes the passage area of the refrigerant expansion passage, It is possible to adjust the flow rate of the refrigerant and switch between the refrigerant expansion passage and the bypass passage by means of the first on-off valve unit and the second on-off valve unit. Therefore, it is possible to suppress leakage of the refrigerant at the connection points between the refrigerant passages and the connection points between the refrigerant passages and the valve unit, and reduce the number of parts for connection.

It is a figure showing a schematic structure of an air conditioner concerning one example of the present invention. FIG. 2 is a diagram showing the flow of refrigerant when the air conditioner of FIG. 1 is in cooling mode; 2 is a diagram showing the flow of refrigerant when the air conditioner in FIG. 1 is in a dehumidifying heating mode; FIG. 2 is a diagram showing the flow of refrigerant when the air conditioner of FIG. 1 is in defrost mode; FIG. FIG. 2 is a perspective view of a valve device included in the air conditioner of FIG. 1; 6 is another perspective view of the valve device of FIG. 5; FIG. Figure 6 is a front view of the valve device of Figure 5; Fig. 6 is a left side view of the valve device of Fig. 5; 6 is a right side view of the valve device of FIG. 5; FIG. Figure 6 is a plan view of the valve device of Figure 5; 6 is a bottom view of the valve device of FIG. 5; FIG. Figure 6 is a rear view of the valve device of Figure 5; FIG. 8 is a cross-sectional view taken along line A1-A1 in FIG. 7; FIG. 8 is a cross-sectional view along line B1-B1 in FIG. 7; FIG. 8 is a cross-sectional view along line C1-C1 of FIG. 7; FIG. 8 is a cross-sectional view taken along line D1-D1 in FIG. 7; FIG. 8 is a cross-sectional view taken along line E1-E1 in FIG. 7; FIG. 10 is a cross-sectional view taken along line F1-F1 of FIG. 9; FIG. 10 is a cross-sectional view taken along line G1-G1 in FIG. 9; FIG. 10 is a cross-sectional view taken along line H1-H1 in FIG. 9; FIG. 6 is a plan view of a valve body included in the valve device of FIG. 5; FIG. 6 is a cross-sectional view of a first on-off valve unit included in the valve device of FIG. 5; FIG. 6 is a cross-sectional view of a second on-off valve unit included in the valve device of FIG. 5;

An air conditioner according to one embodiment of the present invention will be described below with reference to FIGS. 1 to 23. FIG.

FIG. 1 is a diagram showing a schematic configuration of an air conditioner according to one embodiment of the present invention. 2 to 4 are diagrams showing the flow of refrigerant in the air conditioner of FIG. 2 to 4 show refrigerant flows in the cooling mode, the dehumidifying heating mode and the defrosting mode. In FIGS. 2 to 4, the on-off valve unit or on-off valve shown in black indicates a state in which the refrigerant passage is closed. 5 to 12 are a perspective view, another perspective view, a front view, a left side view, a right side view, a plan view, a bottom view and a rear view of the valve device of the air conditioner of FIG. 13 to 17 are cross-sectional views along line A1-A1, cross-sectional views along line B1-B1, cross-sectional views along line C1-C1, cross-sectional views along line D1-D1, and cross-sectional views along line E1-E1 in FIG. It is a cross-sectional view along the . 18 to 20 are cross-sectional views along line F1-F1, cross-sectional views along line G1-G1, and cross-sectional views along line H1-H1 in FIG. 21 is a plan view of a valve body included in the valve device of FIG. 5. FIG. 22 is a cross-sectional view of a first on-off valve unit included in the valve device of FIG. 5. FIG. 23 is a cross-sectional view of a second on-off valve unit included in the valve device of FIG. 5. FIG. In each figure, the X direction indicated by arrow X is the left-right direction (horizontal direction), the Y direction indicated by arrow Y is the front-back direction, and the Z direction indicated by arrow Z is the up-down direction. In the arrow X, the letter "X" is to the right, in the arrow Y, the letter "Y" is backward, and in the arrow Z, the letter "Z" is upward.

The air conditioner 1 according to this embodiment is, for example, a vehicle air conditioner that is mounted on a vehicle and cools or heats the air blown into the vehicle compartment.

As shown in FIG. 1, the air conditioner 1 includes a valve device 10, a compressor 20, an indoor condenser 30, an indoor evaporator 40, an outdoor heat exchanger 50, a check valve 60, a flow control valve 70 and an on-off valve 80 .

As shown in FIGS. 5 to 23, the valve device 10 includes a valve body 100, an expansion valve unit 200, a first on-off valve unit 300, a second on-off valve unit 400, and a check valve unit 500. have.

The valve body 100 is formed, for example, by extruding an aluminum alloy. The valve body 100 has a substantially rectangular parallelepiped shape. The valve body 100 has a front surface 101 , a rear surface 102 , a left surface 103 , a right surface 104 , a top surface 105 and a bottom surface 106 . Each face is the outer surface of the valve body 100 and is flat. The front surface 101 and the rear surface 102 are arranged parallel to each other. The left side 103 and the right side 104 are arranged parallel to each other. Left side 103 is perpendicular to front 101 . Top surface 105 and bottom surface 106 are arranged parallel to each other. Top surface 105 is perpendicular to front surface 101 and left side surface 103 . The front face 101 is the first outer face. Back surface 102 is the second outer surface. The left side 103 is the third outer surface. The upper surface 105 is the fourth outer surface.

The front face 101 has an entrance opening 171 and a passage exit opening 182 (Figs. 5 and 7). The back surface 102 has an exit opening 172 and a through entrance opening 181 (FIGS. 6, 12).

The inlet opening 171 is connected to the outlet of the indoor evaporator 40 via a pipe P13 (Fig. 1). The passage outlet opening 182 is connected to the suction port of the compressor 20 via a pipe P16. The outlet opening 172 is connected to the inlet of the outdoor heat exchanger 50 via a pipe P14. The passage inlet opening 181 is connected to the outlet of the outdoor heat exchanger 50 via a pipe P15.

The valve body 100 has a plurality of coolant passages formed by cutting. Specifically, the valve body 100 has an inlet passage 110 , an outlet passage 120 , a refrigerant expansion passage 130 , a bypass passage 140 and a passage passage 150 .

The entrance passage 110 is connected to the entrance opening 171 (Figs. 15 and 16). The entrance passage 110 linearly extends from the entrance opening 171 in the direction normal to the front face 101 (rearward). The inlet passage 110 has a columnar shape whose diameter gradually decreases with increasing distance from the front face 101 . The inlet passage 110 may have a columnar shape other than a columnar shape.

The outlet passage 120 is connected with the outlet opening 172 (Figs. 14 and 17). The outlet passage 120 extends linearly from the outlet opening 172 in the direction normal to the rear surface 102 (forward). The outlet passage 120 has a cylindrical shape whose diameter gradually decreases as it moves away from the back surface 102 . The outlet passage 120 may have a columnar shape other than a cylindrical shape.

The centerline of the inlet passage 110 and the centerline of the outlet passage 120 are parallel to each other. The centerline of the inlet passageway 110 is parallel to the front-rear direction. The centerline of the outlet passageway 120 is located to the right and below the centerline of the inlet passageway 110 . The centerline of the inlet passageway 110 and the centerline of the outlet passageway 120 are contained in one imaginary plane, which is slanted (ie, non-parallel) with respect to the left side 103 and the top surface 105 .

The refrigerant expansion passage 130 connects the inlet passage 110 and the outlet passage 120 (FIGS. 14, 16, 19 and 20). An expansion valve unit 200 and a first on-off valve unit 300 are arranged in the refrigerant expansion passage 130 . The refrigerant expansion passage 130 has an expansion valve chamber 211, an expansion valve port 212, a connection passage 215, a first on-off valve chamber 311, and a first on-off valve port 312, which are connected in this order.

The expansion valve chamber 211 has a cylindrical shape. The central axis of the expansion valve chamber 211 is parallel to the left-right direction. The right end portion of the expansion valve chamber 211 has an annular tapered shape in which the diameter decreases from left to right. An inlet passage 110 is connected to the expansion valve chamber 211 . In this embodiment, the inlet passage 110 has a constricted portion 110a. The constricted portion 110 a is located at the end of the inlet passage 110 near the expansion valve chamber 211 . The inner diameter of the constricted portion 110 a is smaller than the inner diameter of the portion of the inlet passage 110 between the constricted portion 110 a and the inlet opening 171 . There is a stepped portion 110b at a connection point between the portion of the inlet passage 110 and the constricted portion 110a. The constricted portion 110a reduces air bubbles contained in the refrigerant flowing into the expansion valve chamber 211 from the inlet passage 110, thereby reducing noise. The dimensions (length, inner diameter) of the constricted portion 110a are set according to the noise to be dealt with. The length of the constricted portion 110a is desirably a length that does not affect the connection opening 417 (described later). The inlet passage 110 may not have the constricted portion 110a, and may have a shape having a constant (including substantially constant) inner diameter as a whole. Also, a straightening member (not shown) may be arranged in the inlet passage 110 . The rectifying member is, for example, a plate-like or cylindrical member made of metal mesh, punching metal, or the like and having a large number of meshes and through holes. The rectifying member can effectively break up the air bubbles contained in the refrigerant passing through it. The straightening member may be locked to the stepped portion 110b. For example, the straightening member may be inserted into the inlet passage 110 from the side of the inlet opening 171 and brought into contact with the stepped portion 110b.

The expansion valve port 212 has a cylindrical shape with a smaller diameter than the expansion valve chamber 211 . The expansion valve port 212 extends rightward from the right end of the expansion valve chamber 211 . The expansion valve port 212 is arranged coaxially with the expansion valve chamber 211 .

The connection passage 215 has a cylindrical shape with the same diameter as the expansion valve port 212 . In this specification, the term "same" includes substantially the same meaning. The connection passage 215 extends upward from the expansion valve port 212 . The refrigerant expansion passage 130 has two connection passages 215 .

The first on-off valve chamber 311 has a cylindrical shape. The central axis of the first on-off valve chamber 311 is parallel to the vertical direction. A connection passage 215 opens at the bottom surface of the first on-off valve chamber 311 (FIGS. 19 and 21).

The first on-off valve opening 312 has a cylindrical shape with a diameter smaller than that of the first on-off valve chamber 311 . The first on-off valve port 312 is arranged coaxially with the first on-off valve chamber 311 . The first on-off valve port 312 extends downward from the first on-off valve chamber 311 . The first on-off valve port 312 is surrounded by a first on-off valve seat 313 in the first on-off valve chamber 311 . A lower end portion of the first on-off valve port 312 is connected to the outlet passage 120 .

The bypass passage 140 connects the inlet passage 110 and the outlet passage 120 (Figs. 14, 16 and 18). A second on-off valve unit 400 is arranged in the bypass passage 140 . The bypass passage 140 has a second on-off valve chamber 411 and a second on-off valve port 412 that are connected in order.

The second on-off valve chamber 411 has a cylindrical shape. The central axis of the second on-off valve chamber 411 is parallel to the vertical direction. A portion of the second on-off valve chamber 411 overlaps the inlet passage 110 . In other words, the central axis of the second on-off valve chamber 411 and the central axis of the inlet passage 110 are spaced apart, and the shortest distance between them is the radius of the second on-off valve chamber 411 and the radius of the inlet passage 110. less than the sum of The inlet passage 110 extends linearly so as to skim the second on-off valve chamber 411 . A connection opening 417 is formed where the second on-off valve chamber 411 and the inlet passage 110 overlap. The connection opening 417 connects the inlet passage 110 and the second on-off valve chamber 411 .

The second on-off valve port 412 has a cylindrical shape with a diameter smaller than that of the second on-off valve chamber 411 . The second on-off valve port 412 is arranged coaxially with the second on-off valve chamber 411 . The second on-off valve port 412 extends downward from the second on-off valve chamber 411 . The second on-off valve port 412 is surrounded by a second on-off valve seat 413 in the second on-off valve chamber 411 . A lower end portion of the second on-off valve port 412 is connected to the outlet passage 120 .

The passage passage 150 penetrates the valve body 100 from the back surface 102 to the front surface 101 (Figs. 13 and 16). A passageway 150 connects a passage inlet opening 181 located on the rear surface 102 and a passage outlet opening 182 located on the front surface 101 . A check valve unit 500 is arranged in the passageway 150 .

The expansion valve unit 200 can change the passage area of the refrigerant expansion passage 130 steplessly. The expansion valve unit 200 constitutes an expansion valve together with the valve body 100 . As shown in FIGS. 16 and 19 , the valve body 100 has an expansion valve chamber 211 and an expansion valve port 212 opening into the expansion valve chamber 211 . The expansion valve chamber 211 and the expansion valve port 212 are part of the refrigerant expansion passage 130 .

The expansion valve unit 200 has a power element 220 , a valve member 230 , an operating rod 240 , an adjusting screw member 250 and a support member 260 .

The power element 220 is attached to the power element attachment hole 161 with a screw structure. The power element mounting hole 161 is arranged on the right side surface 104 of the valve body 100 . The power element 220 has a case 221 , a diaphragm 222 and a stopper member 223 . The diaphragm 222 divides the inner space of the case 221 into a pressure actuation chamber 224 and a refrigerant introduction chamber 225 . The coolant introduction chamber 225 is connected to the passageway 150 via a connection hole 162 . The stopper member 223 has a disc shape and is arranged in the coolant introduction chamber 225 . The right end of the operating rod 240 is connected to the stopper member 223 . Stopper member 223 is in contact with diaphragm 222 . The stopper member 223 transmits displacement of the diaphragm 222 to the operating rod 240 .

The valve member 230 has a spherical shape. The valve member 230 is arranged inside the expansion valve chamber 211 and faces the expansion valve port 212 .

The operating rod 240 is arranged across the refrigerant introduction chamber 225 , the connection hole 162 , the passage passage 150 , the through hole 163 and the expansion valve port 212 . A left end of the operating rod 240 contacts the valve member 230 .

The adjusting screw member 250 is attached to the adjusting screw member attachment hole 164 with a screw structure. The adjusting screw member mounting hole 164 is arranged on the left side surface 103 of the valve body 100 . The adjusting screw member mounting hole 164 is connected to the expansion valve chamber 211 .

The support member 260 is spaced apart from the adjustment screw member 250 in the left-right direction in the expansion valve chamber 211 . A compression coil spring 270 is arranged between the support member 260 and the adjusting screw member 250 . The compression coil spring 270 presses the valve member 230 toward the expansion valve port 212 (rightward) via the support member 260 . The force with which the compression coil spring 270 presses the valve member 230 is adjusted by the screwing amount of the adjusting screw member 250 into the adjusting screw member mounting hole 164 .

In the expansion valve unit 200, the diaphragm 222 pushes the valve member 230 leftward via the stopper member 223 and the operating rod 240, and the compression coil spring 270 pushes the valve member 230 rightward via the support member 260. The force with which diaphragm 222 pushes valve member 230 changes according to the temperature of the coolant flowing through passage 150 . The force with which the compression coil spring 270 presses the valve member 230 is constant after adjustment by the adjustment screw member 250 . As a result, the valve member 230 moves to a position where the force of the diaphragm 222 pushing the valve member 230 and the force of the compression coil spring 270 pushing the valve member 230 are balanced, and the opening degree of the expansion valve port 212 (that is, the refrigerant expansion passage) 130 passage area) changes steplessly.

The valve device 10 employs, as the expansion valve unit 200, a mechanical expansion valve whose valve body is moved by a diaphragm. As the expansion valve unit 200, the valve device 10 may employ an electric flow control valve unit in which a valve body is moved by a stepping motor. Strictly speaking, such a flow control valve unit changes the passage area stepwise. However, since the amount of movement of the valve body per step is small, the passage area can be changed substantially steplessly. That is, in this specification, "stepless" includes being substantially stepless.

The first on-off valve unit 300 is arranged rearward on the upper surface 105 . The first on-off valve unit 300 can open and close the refrigerant expansion passage 130 (that is, change the passage area to 0 or greater than 0).

The first on-off valve unit 300 constitutes a pilot-type on-off valve together with the valve body 100 . The valve body 100 has a first on-off valve chamber 311 , a first on-off valve port 312 opening into the first on-off valve chamber 311 , and a first on-off valve seat 313 surrounding the first on-off valve port 312 . there is The first on-off valve chamber 311 and the first on-off valve port 312 are part of the refrigerant expansion passage 130 . Note that the first on-off valve unit 300 may have a valve chamber and a valve seat, for example, like the electric valve disclosed in Japanese Unexamined Patent Application Publication No. 2016-200198.

As shown in FIG. 22 , the first on-off valve unit 300 has a main valve body 320 and a valve body drive section 330 .

The main valve body 320 has a disk shape. The main valve body 320 has a pilot passage 325 and a pressure equalizing passage 326 . The main valve body 320 contacts and separates from the first on-off valve seat 313 to open and close the first on-off valve port 312 .

The valve body driving portion 330 has a holder 331 , a case 332 , a plunger 333 , an electromagnetic coil 334 , a pilot valve body 335 and a fixed iron core 336 .

The holder 331 is attached to the first on-off valve attachment hole 165 with a screw structure. The first on-off valve mounting hole 165 is arranged on the upper surface 105 of the valve body 100 . The holder 331 has a cylindrical shape. Inside the holder 331, the main valve body 320 is arranged so as to be vertically movable. The main valve body 320 partitions the first on-off valve chamber 311 and the back pressure chamber 314 inside the holder 331 . Pilot passage 325 connects back pressure chamber 314 and first on-off valve port 312 . The pressure equalizing passage 326 connects the first on-off valve chamber 311 and the back pressure chamber 314 . A valve opening spring 337 is arranged between the main valve body 320 and the holder 331 . The valve opening spring 337 is a compression coil spring. The valve opening spring 337 pushes the main valve body 320 upward.

The case 332 has a cylindrical shape. A lower end portion of the case 332 is arranged inside the holder 331 and is joined to the holder 331 . A cylindrical stationary core 336 is arranged inside the upper end of the case 332 . A fixed core 336 is joined to the upper end of the case 332 . A spring receiving member 336 a is arranged on the lower end surface of the fixed iron core 336 .

The plunger 333 has a cylindrical shape. The plunger 333 is arranged inside the case 332 so as to be vertically movable. A spring accommodation hole 333 a is formed in the upper end surface of the plunger 333 . A plunger spring 338 is arranged between the bottom surface 333 b of the spring housing hole 333 a of the plunger 333 and the spring receiving member 336 a of the fixed iron core 336 . Plunger spring 338 is a compression coil spring. A plunger spring 338 pushes the plunger 333 downward.

The electromagnetic coil 334 has a cylindrical shape. A case 332 is inserted inside the electromagnetic coil 334 . The electromagnetic coil 334 is arranged outside the case 332 . Electromagnetic coil 334 magnetizes stationary core 336 and plunger 333 .

The pilot valve body 335 has a conical shape facing downward. The pilot valve body 335 is integrally connected to the lower end surface of the plunger 333 . The pilot valve body 335 is arranged in the back pressure chamber 314 . The pilot valve body 335 opens and closes the pilot passage 325 .

In the first on-off valve unit 300, when the electromagnetic coil 334 is not energized, the plunger 333 is pushed by the plunger spring 338 and moves downward. Pilot valve body 335 also moves downward, pilot valve body 335 closes pilot passage 325, and pushes main valve body 320 downward. The main valve body 320 contacts the first on-off valve seat 313 and the first on-off valve opening 312 is closed. When the first on-off valve port 312 is closed, the flow of refrigerant from the first on-off valve chamber 311 and the back pressure chamber 314 to the first on-off valve port 312 is cut off. The refrigerant stays in the first on-off valve chamber 311 and the back pressure chamber 314 . The main valve body 320 is pressed against the first on-off valve seat 313 by the refrigerant.

In the first on-off valve unit 300, when the electromagnetic coil 334 is energized, the plunger 333 moves upward due to the magnetic force. The pilot valve element 335 also moves upward, opening the pilot passage 325 . Refrigerant in the back pressure chamber 314 flows through the pilot passage 325 to the first on-off valve port 312 , and the force of the refrigerant pressing the main valve body 320 against the first on-off valve seat 313 is weakened. The valve opening spring 337 pushes the main valve element 320 upward, the main valve element 320 is separated from the first opening/closing valve seat 313, and the first opening/closing valve port 312 is opened.

The second on-off valve unit 400 is arranged on the upper surface 105 toward the front. The second on-off valve unit 400 can open and close the bypass passage 140 (that is, change the passage area to 0 or an area larger than 0).

The second on-off valve unit 400 constitutes a pilot-type on-off valve together with the valve main body 100 . The valve body 100 has a second on-off valve chamber 411 , a second on-off valve port 412 opening into the second on-off valve chamber 411 , and a second on-off valve seat 413 surrounding the second on-off valve port 412 . there is The second on-off valve chamber 411 and the second on-off valve port 412 are part of the bypass passage 140 . Note that the second on-off valve unit 400 may have a valve chamber and a valve seat, for example, like the electric valve disclosed in Japanese Patent Laid-Open No. 2016-200198.

As shown in FIG. 23 , the second on-off valve unit 400 has a main valve body 420 and a valve body driving section 430 .

The main valve body 420 integrally has a body portion 421, an upper flange portion 422, and a lower flange portion 423. The body portion 421 has a columnar shape. The upper flange portion 422 has an annular shape. The inner peripheral edge of the upper flange portion 422 is connected to the upper portion of the body portion 421 . The lower flange portion 423 has an annular shape. The inner peripheral edge of the lower flange portion 423 is connected to the lower portion of the body portion 421 . The trunk portion 421 has a pilot passage 425 . The upper flange portion 422 has a pressure equalizing passage 426 . An annular plate-shaped packing is arranged on the lower flange portion 423 . The main valve body 420 (specifically, the lower flange portion 423 ) contacts and separates from the second on-off valve seat 413 to open and close the second on-off valve opening 412 . A valve opening spring 437 is arranged between the upper flange portion 422 of the main valve body 420 and the valve body 100 . The valve opening spring 437 is a compression coil spring. The valve opening spring 437 pushes the upper flange portion 422 of the main valve body 420 upward.

The valve body driving portion 430 has a fixed iron core 431 , a case 432 , a plunger 433 , an electromagnetic coil 434 , a pilot valve body 435 and a valve shaft 436 .

The fixed core 431 integrally has a large-diameter cylindrical portion 431a and a small-diameter cylindrical portion 431b. The large-diameter cylindrical portion 431a is attached to the second on-off valve attachment hole 166 by a screw structure. The second on-off valve mounting hole 166 is arranged on the upper surface 105 of the valve body 100 . The small-diameter cylindrical portion 431b is arranged coaxially with the large-diameter cylindrical portion 431a. The outer diameter of the small-diameter cylindrical portion 431b is smaller than the outer diameter of the large-diameter cylindrical portion 431a. The small-diameter cylindrical portion 431 b protrudes from the upper surface 105 . Inside the large-diameter cylindrical portion 431a, the upper flange portion 422 of the main valve body 420 is arranged so as to be vertically movable. The upper flange portion 422 of the main valve body 420 separates the second on-off valve chamber 411 from the back pressure chamber 414 inside the large-diameter cylindrical portion 431a. Pilot passage 425 connects back pressure chamber 414 and second on-off valve port 412 . The pressure equalizing passage 426 connects the second on-off valve chamber 411 and the back pressure chamber 414 .

The case 432 has a cylindrical shape with an open lower end and a closed upper end. A small-diameter cylindrical portion 431 b of the fixed core 431 is arranged inside the lower end portion of the case 432 . A lower end of the case 432 is joined to the fixed core 431 .

The plunger 433 has a cylindrical shape. The plunger 433 is arranged inside the case 432 so as to be vertically movable. A plunger spring 438 is arranged between the plunger 433 and the fixed core 431 . Plunger spring 438 is a compression coil spring. A plunger spring 438 pushes the plunger 433 upward.

The electromagnetic coil 434 has a cylindrical shape. A case 432 is inserted inside the electromagnetic coil 434 . The electromagnetic coil 434 is arranged outside the case 432 . Electromagnetic coil 434 magnetizes fixed core 431 and plunger 433 .

The pilot valve body 435 is integrally connected to the lower end of the valve shaft 436 . The pilot valve body 435 is arranged in the back pressure chamber 414 . Pilot valve body 435 is connected to plunger 433 via valve shaft 436 . A disk-shaped packing is arranged on the pilot valve body 435 . Pilot valve body 435 opens and closes pilot passage 425 .

The valve shaft 436 has an elongated cylindrical shape. The upper end of valve shaft 436 is fixed to the lower end of plunger 433 . The valve shaft 436 is arranged inside the small-diameter cylindrical portion 431 b of the fixed iron core 431 . The valve shaft 436 is supported by the small-diameter cylindrical portion 431b so as to be vertically movable.

In the second on-off valve unit 400, when the electromagnetic coil 434 is energized, the plunger 433 moves downward due to the magnetic force. Pilot valve body 435 also moves downward, pilot valve body 435 closes pilot passage 425, and pushes main valve body 420 downward. The main valve body 420 contacts the second on-off valve seat 413 and the second on-off valve port 412 is closed. When the second on-off valve port 412 is closed, the flow of refrigerant from the second on-off valve chamber 411 and the back pressure chamber 414 to the second on-off valve port 412 is cut off. The refrigerant stays in the second on-off valve chamber 411 and the back pressure chamber 414 . The main valve body 420 is pressed against the second on-off valve seat 413 by the refrigerant.

In the second on-off valve unit 400, when the electromagnetic coil 434 is not energized, the plunger 433 is pushed by the plunger spring 438 and moves upward. The pilot valve body 435 also moves upward, opening the pilot passage 425 . Refrigerant in the back pressure chamber 414 flows through the pilot passage 425 to the second on-off valve port 412, and the force of the refrigerant pressing the main valve body 420 against the second on-off valve seat 413 is weakened. The valve-opening spring 437 pushes the main valve body 420 upward to separate the main valve body 420 from the second on-off valve seat 413 and open the second on-off valve port 412 .

The check valve unit 500 is arranged in the passageway 150 . The check valve unit 500 permits the flow of refrigerant from the through inlet opening 181 to the through outlet opening 182 in the through passage 150 and inhibits the flow of refrigerant from the through outlet opening 182 to the through inlet opening 181 . Note that the check valve unit 500 is an option, and the check valve unit 500 may be omitted from the valve device 10 .

The check valve unit 500 constitutes a check valve together with the valve body 100 . As shown in FIGS. 13 and 16 , the valve body 100 has an annular tapered valve seat 513 in the passage 150 . The check valve unit 500 has a valve body 520 and a coil spring 530 . The valve element 520 is arranged in the passage 150 so as to be movable in the refrigerant flow direction (front-rear direction). The valve body 520 has an annular valve portion 521 . The central axis of coil spring 530 is parallel to the flow direction of the refrigerant within passage 150 . An end portion of the coil spring 530 on the passage outlet opening 182 side is fixed to the valve body 100 via a support member 540 . The end of the coil spring 530 on the passage inlet opening 181 side is connected to the valve body 520 .

In the passage passage 150, when the pressure of the refrigerant at the passage inlet opening 181 becomes equal to or higher than the refrigerant pressure at the passage outlet opening 182, the valve body 520 is pulled toward the passage outlet opening 182 (forward) by the coil spring 530, and the valve portion 521 is closed. Away from valve seat 513, passageway 150 opens. This allows the refrigerant to flow from the passage inlet opening 181 to the passage outlet opening 182 in the passage passage 150 .

In the passing passage 150, when the pressure of the refrigerant at the passing inlet opening 181 becomes smaller than the refrigerant pressure at the passing outlet opening 182, the valve body 520 is pushed toward the passing inlet opening 181 (rearward) by the refrigerant, and the coil spring 530 expands. As a result, the valve portion 521 comes into contact with the valve seat 513 and the passageway 150 is closed. This inhibits the flow of refrigerant from the passage outlet opening 182 to the passage inlet opening 181 in the passage passage 150 .

As shown in FIG. 1, the discharge port of the compressor 20 is connected to the inlet of the indoor condenser 30 via a pipe P11. The compressor 20 sucks refrigerant, compresses the refrigerant, and discharges a high-temperature, high-pressure refrigerant. The indoor condenser 30 releases the heat of the refrigerant discharged by the compressor 20 . The indoor condenser 30 heats the blown air to the passenger compartment. The outlet of the indoor condenser 30 is connected to the inlet of the indoor evaporator 40 via a pipe P12. A check valve 60 and a flow control valve 70 are arranged in the pipe P12. The check valve 60 permits the flow of refrigerant from the indoor condenser 30 to the indoor evaporator 40 in the pipe P12 and prohibits the flow of refrigerant from the indoor evaporator 40 to the indoor condenser 30 . The flow control valve 70 can steplessly change the passage area of the pipe P12. Refrigerant flows through the interior of the indoor evaporator 40, and heat is exchanged between the refrigerant and the air blown to the passenger compartment. The indoor evaporator 40 cools the blown air. The outlet of the indoor evaporator 40 is connected to the inlet opening 171 of the valve device 10 via a pipe P13. A refrigerant flows through the interior of the outdoor heat exchanger 50, and heat is exchanged between the refrigerant and the outside air. The inlet of the outdoor heat exchanger 50 is connected to the outlet opening 172 of the valve device 10 via the pipe P14. The outlet of the outdoor heat exchanger 50 is connected to the passage inlet opening 181 of the valve device 10 via the pipe P15. A suction port of the compressor 20 is connected to the passage outlet opening 182 of the valve device 10 via a pipe P16. The on-off valve 80 is arranged in a pipe P17 that connects the pipe P13 and the pipe P16. The on-off valve 80 can open and close the pipe P17. It should be noted that the connection of each device by piping may be a substantial connection. For example, an accumulator that separates the refrigerant into a gas phase and a liquid phase may be arranged in the pipe P16, and the valve device 10 and the compressor 20 may be connected via the accumulator. The pipes P11 to P17 are refrigerant passages.

The air conditioner 1 has a control device (not shown). The control device controls the compressor 20 , the valve device 10 (the first on-off valve unit 300 and the second on-off valve unit 400 ), the flow control valve 70 and the on-off valve 80 . The air conditioner 1 has a cooling mode, a dehumidifying heating mode, and a defrosting mode.

In the cooling mode, the controller of the air conditioner 1 closes the refrigerant expansion passage 130 by the first on-off valve unit 300 of the valve device 10, closes the bypass passage 140 by the second on-off valve unit 400, and closes the pipe P12 by the flow control valve 70. is set to a size that allows the refrigerant to expand, and the on-off valve 80 opens the pipe P17. Then, the control device operates the compressor 20 to circulate the refrigerant. As shown in FIG. 2 , in the cooling mode, the refrigerant passes through the compressor 20, the indoor condenser 30, the check valve 60, the flow control valve 70, the indoor evaporator 40, and the on-off valve 80 in order, and then into the compressor 20. return. In the cooling mode, the blown air is cooled by the indoor evaporator 40 and then sent to the passenger compartment.

In the dehumidifying and heating mode, the control device of the air conditioner 1 opens the refrigerant expansion passage 130 by the first on-off valve unit 300 of the valve device 10, closes the bypass passage 140 by the second on-off valve unit 400, and closes the piping by the flow control valve 70. The passage area of P12 is set to a size that allows the refrigerant to expand, and the opening/closing valve 80 closes the pipe P17. Then, the control device operates the compressor 20 to circulate the refrigerant. As shown in FIG. 3 , in the dehumidification and heating mode, the refrigerant is sequentially supplied to the compressor 20, the indoor condenser 30, the check valve 60, the flow control valve 70, the indoor evaporator 40, the inlet passage 110 of the valve device 10, the refrigerant It returns to the compressor 20 through the expansion passage 130 (expansion valve unit 200, first on-off valve unit 300), the outlet passage 120, the outdoor heat exchanger 50, and the passage passage 150 (check valve unit 500). The expansion valve unit 200 of the valve device 10 expands the refrigerant flowing through the refrigerant expansion passage 130 according to the temperature of the refrigerant flowing through the passage 150 and introduces the expanded refrigerant into the outdoor heat exchanger 50 . In the dehumidifying heating mode, the blown air is cooled (dehumidified) by the indoor evaporator 40, heated by the indoor condenser 30, and then sent to the passenger compartment.

In the defrosting mode, the control device of the air conditioner 1 closes the refrigerant expansion passage 130 by the first on-off valve unit 300 of the valve device 10, opens the bypass passage 140 by the second on-off valve unit 400, and closes the piping by the flow control valve 70. The passage area of P12 is maximized, and the opening/closing valve 80 closes the pipe P17. Then, the control device operates the compressor 20 to circulate the refrigerant. As shown in FIG. 4, in the defrosting mode, the refrigerant is sequentially supplied to the compressor 20, the indoor condenser 30, the check valve 60, the flow control valve 70, the indoor evaporator 40, the inlet passage 110 of the valve device 10, the bypass It passes through passage 140 (second on-off valve unit 400 ), outlet passage 120 , outdoor heat exchanger 50 , passage passage 150 (check valve unit 500 ) of valve device 10 and returns to compressor 20 . In the defrost mode, relatively high temperature refrigerant flows through the indoor evaporator 40 and the outdoor heat exchanger 50 to remove frost.

The valve device 10 according to this embodiment has one valve body 100 having a plurality of refrigerant passages, and a plurality of valve units attached to the valve body 100 . a plurality of refrigerant passages, an inlet passage 110 connected to an inlet opening 171 located on the front face 101 of the valve body 100 and an outlet passage 120 connected to an outlet opening 172 located on the back face 102 of the valve body 100; A refrigerant expansion passage 130 connecting the inlet passage 110 and the outlet passage 120 and a bypass passage 140 connecting the inlet passage 110 and the outlet passage 120 are included. A plurality of valve units include: an expansion valve unit 200 capable of steplessly changing the passage area of the refrigerant expansion passage 130; a first opening/closing valve unit 300 capable of opening and closing the refrigerant expansion passage 130; 2 on-off valve unit 400.

As a result, the inlet passage 110, the outlet passage 120, the refrigerant expansion passage 130, and the bypass passage 140 are connected inside the valve body 100, and the expansion valve unit 200 connects the refrigerant expansion passage 130. By changing the passage area, the flow rate of the refrigerant can be adjusted, and the refrigerant expansion passage 130 and the bypass passage 140 can be switched by the first on-off valve unit 300 and the second on-off valve unit 400 . Therefore, it is possible to suppress leakage of the refrigerant at the connection points between the refrigerant passages and the connection points between the refrigerant passages and the valve unit, and reduce the number of parts for connection. In addition, since piping connecting the valve units can be omitted, the pressure loss of the refrigerant can be suppressed, and the amount of refrigerant used in the air conditioner 1 can be reduced.

In addition, the plurality of refrigerant passages further includes passage passages 150 . A pass-through passageway 150 connects a pass-through inlet opening 181 located on the rear surface 102 of the valve body 100 and a pass-through outlet opening 182 located on the front surface 101 of the valve body 100 . The expansion valve unit 200 changes the passage area of the refrigerant expansion passage 130 according to the temperature of the refrigerant flowing through the passage 150 . By doing so, the expansion valve unit 200 can be caused to operate autonomously, and the control of the expansion valve unit 200 in the control device can be omitted.

Also, the plurality of valve units are check valves that allow the flow of refrigerant from the passage inlet opening 181 to the passage outlet opening 182 in the passage passage 150 and prohibit the flow of refrigerant from the passage outlet opening 182 to the passage inlet opening 181. Also contains units. By doing so, it is possible to suppress the reverse flow of the coolant and allow the coolant to flow in the normal direction.

An inlet opening 171 is arranged on the planar front surface 101 of the valve body 100 , and an outlet opening 172 is arranged on the planar rear surface 102 parallel to the front surface 101 of the valve body 100 . The entrance passage 110 has a cylindrical shape extending linearly from the entrance opening 171 in the normal direction of the front surface 101 , and the exit passage 120 has a cylindrical shape extending linearly from the exit opening 172 in the normal direction of the rear surface 102 . is doing. One imaginary plane containing the centerline of the inlet passage 110 and the centerline of the outlet passage 120 is non-parallel to the planar left side 103 perpendicular to the front face 101 of the valve body 100 and the front face 101 of the valve body 100. and non-parallel to the planar top surface 105 perpendicular to the left side. By doing so, compared to a configuration in which the center line of the inlet passage 110 and the center line of the outlet passage 120 are aligned in the horizontal direction or the configuration in which they are aligned in the vertical direction, the volumes of the inlet passage 110 and the outlet passage 120 can be secured. The size of the valve body 100 can be reduced.

Also, an inlet opening 171 is arranged on the front face 101 of the valve body 100 . The entrance passage 110 has a cylindrical shape extending linearly from the entrance opening 171 in the direction normal to the front face 101 . The bypass passage 140 has a cylindrical second on-off valve chamber 411 in which the main valve body 420 of the second on-off valve unit 400 is arranged. A portion of the second on-off valve chamber 411 overlaps with the inlet passage 110 . By doing so, the inlet passage 110 and the bypass passage 140 are connected at the overlapping portions. Therefore, an auxiliary passage for connecting the inlet passage 110 and the bypass passage 140 to the valve body 100 is not required, and the shapes (routes) of the inlet passage 110 and the bypass passage 140 can be simplified.

In addition, the air conditioner 1 includes a compressor 20, an indoor condenser 30, an indoor evaporator 40, an outdoor heat exchanger 50, a check valve 60, a flow control valve 70, an on-off valve 80, and a valve device. 10 and . A discharge port of the compressor 20 is connected to an inlet of the indoor condenser 30 . The outlet of indoor condenser 30 is connected to the inlet of indoor evaporator 40 via check valve 60 and flow control valve 70 . An inlet opening 171 is connected with the outlet of the indoor evaporator 40 . An outlet opening 172 is connected with the inlet of the outdoor heat exchanger 50 . A pass-through inlet opening 181 is connected with the outlet of the outdoor heat exchanger. A pass-through outlet opening 182 is connected to the intake of the compressor 20 . An outlet of the indoor evaporator 40 and an inlet of the compressor 20 are connected via an on-off valve 80 . An inlet opening 171 and a passage outlet opening 182 are arranged in the front face 101 . An outlet opening 172 and a pass-through inlet opening 181 are arranged in the rear surface 102 . By doing so, in the air conditioner 1 , the piping extending from the valve device 10 toward the passenger compartment side is connected to the front surface 101 of the valve main body 100 , and the piping extending from the valve device 10 toward the outdoor side is connected to the rear surface 102 of the valve main body 100 . By connecting, it is possible to suppress the complication of the piping arrangement.

Each valve unit of the valve device 10 described above is controlled by a host device or system control device in which it is incorporated. In addition to such a configuration, for example, the valve device 10 may have a control unit, and the control unit may receive all signals from a host device or system and centrally control a plurality of valve units. . In this configuration, the control unit is preferably housed in a case and located on a surface of valve body 100 near passageway 150 (eg, right side 104 of valve body 100). By doing so, the temperature rise of the control unit can be suppressed by the relatively low-temperature refrigerant flowing through the passage 150 .

Also, the expansion valve unit 200 of the valve device 10 described above operates autonomously according to the temperature of the refrigerant flowing through the passage 150 . An electric flow control valve unit may be employed as the expansion valve unit in the valve device 10 . In this case, the passageway 150 may be omitted.

Further, the first on-off valve unit 300 of the valve device 10 described above is a pilot-type on-off valve unit that operates by electromagnetic force, and requires energization in order to maintain the valve open state in which the first on-off valve opening 312 is open. It is. The second on-off valve unit 400 is a pilot-type on-off valve unit operated by electromagnetic force, and requires energization in order to maintain the closed state in which the second on-off valve port 412 is closed. In the valve device 10, instead of these on-off valve units, a latch-type on-off valve unit that maintains the valve open state and the valve closed state even when the energization is stopped may be employed.

In this specification, each term indicating a shape such as "cylinder" or "cylinder" is also used for a member or a portion of a member that substantially has the shape of the term. For example, a "cylindrical member" includes a cylindrical member and a substantially cylindrical member.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations of the embodiments. A person skilled in the art may add, delete, or change the design of the above-described embodiments as appropriate, or combine the features of the embodiments as appropriate, as long as they do not conflict with the spirit of the present invention. included in the range of

DESCRIPTION OF SYMBOLS 1... Air conditioner, 10... Valve apparatus, 20... Compressor, 30... Indoor condenser, 40... Indoor evaporator, 50... Outdoor heat exchanger, 60... Check valve, 70... Flow control valve, 80... On-off valve , 100... Valve main body 101... Front 102... Back 103... Left side 104... Right side 105... Top surface 106... Bottom surface 110... Entrance passage 110a... Constricted part 110b... Stepped part 120... Outlet Passage 130 Refrigerant expansion passage 140 Bypass passage 150 Passing passage 161 Power element mounting hole 162 Connection hole 163 Through hole 164 Adjustment screw member mounting hole 165 First on-off valve mounting Hole 166...Second on-off valve mounting hole 171...Inlet opening 172...Outlet opening 181...Passing inlet opening 182...Passing outlet opening 200...Expansion valve unit 211...Expansion valve chamber 212...Expansion valve port , 215... Connection passage 220... Power element 221... Case 222... Diaphragm 223... Stopper member 224... Pressure operation chamber 225... Refrigerant introduction chamber 230... Valve member 240... Operating rod 250... Adjusting screw Members 260 Support member 270 Compression coil spring 300 First on-off valve unit 311 First on-off valve chamber 312 First on-off valve port 313 First on-off valve seat 314 Back pressure chamber , 320... main valve body, 325... pilot passage, 326... pressure equalizing passage, 330... valve body driving portion, 331... holder, 332... case, 333... plunger, 333a... spring housing hole, 333b... bottom surface, 334... electromagnetic Coil 335 Pilot valve body 336 Fixed iron core 336a Spring receiving member 337 Valve opening spring 338 Plunger spring 400 Second on-off valve unit 411 Second on-off valve chamber 412 Second On-off valve opening 413 Second on-off valve seat 414 Back pressure chamber 417 Connection opening 420 Main valve body 421 Body 422 Upper flange 423 Lower flange 425 Pilot passage , 426... Equalizing passage, 430... Valve body driving part, 431... Fixed iron core, 431a... Large diameter cylindrical part, 431b... Small diameter cylindrical part, 432... Case, 433... Plunger, 434... Electromagnetic coil, 435... Pilot valve body , 436... valve stem, 437... valve opening spring, 438... plunger spring, 500... check valve unit, 513... valve seat, 520... valve body, 521... valve portion, 530... coil spring, 540... support member, P11 ~P17... Piping

Claims

one valve body having a plurality of refrigerant passages;
a plurality of valve units attached to the valve body;
the plurality of refrigerant passages,
an inlet passage connected to an inlet opening located on the outer surface of the valve body;
an outlet passageway connected to an outlet opening disposed on the outer surface of the valve body;
a refrigerant expansion passage connecting the inlet passage and the outlet passage;
a bypass passage connecting the inlet passage and the outlet passage,
The plurality of valve units are
an expansion valve unit capable of changing the passage area of the refrigerant expansion passage;
a first on-off valve unit capable of opening and closing the refrigerant expansion passage;
and a second on-off valve unit capable of opening and closing the bypass passage.
the plurality of refrigerant passages further includes passage passages,
the passageway connects a passage inlet opening disposed on the outer surface of the valve body and a passage outlet opening disposed on the outer surface of the valve body;
2. The valve device according to claim 1, wherein said expansion valve unit changes the passage area of said refrigerant expansion passage in accordance with the temperature of refrigerant flowing through said passage passage.
The plurality of valve units is a check valve unit that allows refrigerant to flow from the passage inlet opening to the passage outlet opening in the passage passage and inhibits refrigerant flow from the passage outlet opening to the passage inlet opening. 3. The valve arrangement of claim 2, further comprising:
the inlet opening is located on a planar first outer surface of the valve body;
the outlet opening is located on a planar second outer surface parallel to the first outer surface of the valve body;
the entrance passage has a columnar shape extending linearly from the entrance opening in a direction normal to the first outer surface;
the outlet passage has a columnar shape extending linearly from the outlet opening in the normal direction of the second outer surface;
An imaginary plane containing the centerline of the inlet passage and the centerline of the outlet passage is non-parallel to a planar third outer surface perpendicular to the first outer surface of the valve body and non-parallel to the valve body. The valve device according to any one of claims 1 to 3, wherein the valve device is non-parallel to a planar fourth outer surface perpendicular to the first and third outer surfaces.
the inlet opening is located on a planar first outer surface of the valve body;
the entrance passage has a columnar shape extending linearly from the entrance opening in a direction normal to the first outer surface;
the bypass passage has a pillar-shaped valve chamber in which the valve body of the second on-off valve unit is arranged;
The valve device according to any one of claims 1 to 3, wherein a portion of the valve chamber overlaps with the inlet passage.
An air conditioner comprising a compressor, an indoor condenser, an indoor evaporator, an outdoor heat exchanger, a check valve, a flow control valve, an on-off valve, and the valve device according to claim 2. hand,
a discharge port of the compressor is connected to an inlet of the indoor condenser;
The outlet of the indoor condenser is connected to the inlet of the indoor evaporator via the check valve and the flow control valve,
the inlet opening is connected to the outlet of the indoor evaporator;
the outlet opening is connected to the inlet of the outdoor heat exchanger;
the passage inlet opening is connected to the outlet of the outdoor heat exchanger;
the passage outlet opening is connected to the suction port of the compressor;
An air conditioner, wherein the outlet of the indoor evaporator and the suction port of the compressor are connected via the on-off valve.
the inlet opening and the passage outlet opening are arranged on one outer surface;
7. An air conditioner as claimed in claim 6, wherein the outlet opening and the through inlet opening are arranged on another outer surface.