WO2020175543A1 - Vanne intégrée - Google Patents

Vanne intégrée Download PDF

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Publication number
WO2020175543A1
WO2020175543A1 PCT/JP2020/007719 JP2020007719W WO2020175543A1 WO 2020175543 A1 WO2020175543 A1 WO 2020175543A1 JP 2020007719 W JP2020007719 W JP 2020007719W WO 2020175543 A1 WO2020175543 A1 WO 2020175543A1
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WO
WIPO (PCT)
Prior art keywords
valve
refrigerant
pressure
liquid
hole
Prior art date
Application number
PCT/JP2020/007719
Other languages
English (en)
Japanese (ja)
Inventor
陽一郎 河本
押谷　洋
陽平 長野
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2020175543A1 publication Critical patent/WO2020175543A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the present disclosure relates to an integrated valve applied to a heat pump cycle.
  • the integrated valve described in Patent Document 1 is adopted.
  • the integrated valve is an integral part of the components for switching the refrigerant circuit.
  • a fixed throttle for depressurizing the liquid refrigerant is housed inside a metal body in which a gas-liquid separation space and the like are formed, and a liquid refrigerant passage is provided.
  • the valve element that opens and closes is driven by a solenoid actuator.
  • Patent Document 1 Japanese Patent Laid-Open No. 2 0 1 5 _ 1 7 7 6 3
  • the integrated valve described in Patent Document 1 is configured to reduce the pressure of the refrigerant by the fixed throttle when switched to the gas injection cycle.
  • the heat absorption amount of the heat exchanger functioning as an evaporator may decrease depending on the conditions, resulting in insufficient capacity.
  • the present disclosure aims to improve at least one of mountability and performance in an integrated valve applied to a heat pump cycle that can be switched to a gas injection cycle.
  • the integrated valve applied to the heat pump cycle that can be switched to the gas injection cycle is
  • a liquid-side valve body that is housed inside the body and that opens and closes the liquid refrigerant passage from the gas-liquid separation space to the liquid outlet.
  • An opening/closing member that is housed inside the body and opens and closes the gas refrigerant passage from the gas-liquid separation space to the gas outlet.
  • a decompression section for decompressing the liquid phase refrigerant flowing through the liquid refrigerant passage and flowing it to the liquid outlet
  • the decompression unit includes a valve component for adjusting the throttle opening of the decompression unit, and the valve component is
  • a drive unit that displaces when its own temperature changes
  • An amplification unit that amplifies the displacement due to the change in the temperature of the drive unit
  • the drive section When the drive section is displaced due to a change in temperature, the drive section biases the amplification section at the bias position, so that the amplification section displaces with the hinge as a fulcrum and the amplification section is connected at the connection position between the amplification section and the movable section. Urges the movable part,
  • the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position.
  • the throttle opening of the pressure reducing section can be changed by the valve component, even if switching to the gas injection cycle, the throttle opening of the pressure reducing section is adjusted to an opening suitable for the cycle load. Can improve the performance.
  • the amplification part of the valve component functions as a lever. Therefore, the amount of displacement according to the temperature change of the driving part is amplified by the lever and transmitted to the moving part.
  • the valve component in which the displacement amount due to the thermal expansion is amplified by using the lever can be made smaller than the solenoid valve or the motor-operated valve that does not use the lever.
  • the integrated valve applied to the heat pump cycle that can be switched to the gas injection cycle is
  • a liquid-side valve body that is housed inside the body and that opens and closes the liquid refrigerant passage from the gas-liquid separation space to the liquid outlet.
  • An opening/closing member that is housed inside the body and opens and closes the gas refrigerant passage from the gas-liquid separation space to the gas outlet.
  • the body is provided with a pressure control chamber into which a refrigerant for pressing the liquid side valve element toward the valve opening side or the valve closing side is introduced.
  • the drive member includes a valve component for adjusting the pressure of the refrigerant in the pressure control chamber,
  • the valve parts are identical to The valve parts.
  • An amplification unit that amplifies the displacement due to the change in the temperature of the drive unit
  • the displacement amplified by the amplification unit is transmitted to move the movable unit that adjusts the pressure of the refrigerant flowing through the fluid chamber.
  • the drive section When the drive section is displaced due to a change in temperature, the drive section biases the amplification section at the bias position, so that the amplification section displaces with the hinge as a fulcrum and the amplification section is connected at the connection position between the amplification section and the movable section. Urges the movable part,
  • the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position.
  • the liquid side valve body can be displaced to the valve opening side or the valve closing side by the pressure adjustment of the pressure control chamber by the valve component. Since this amplifying part functions as a lever, this valve component can be made smaller than a solenoid valve or a motor-operated valve that does not use such a lever. As a result, the integrated valve can be miniaturized, and the mountability can be improved.
  • Fig. 1 is an overall configuration diagram showing a refrigerant circuit in a cooling mode of a heat pump cycle including an integrated valve according to a first embodiment.
  • FIG. 2 is an overall configuration diagram showing a refrigerant circuit in a first heating mode of the heat pump cycle including the integrated valve according to the first embodiment.
  • Fig. 3 is an overall configuration diagram showing a refrigerant circuit in a second heating mode of the heat pump cycle including the integrated valve according to the first embodiment. ⁇ 2020/175543 5 (:171? 2020/007719
  • FIG. 4 is a schematic cross-sectional view of the integrated valve according to the first embodiment.
  • Fig. 5 is a schematic cross-sectional view showing a state in which the pressure reducing portion of the integrated valve according to the first embodiment does not exert a pressure reducing action.
  • FIG. 6 A schematic cross-sectional view showing a state in which the pressure reducing portion of the integrated valve according to the first embodiment exhibits a pressure reducing action.
  • FIG. 7 is an enlarged view of a part of the integrated valve according to the first embodiment.
  • FIG. 8 is a schematic exploded perspective view of a microvalve used in the pressure reducing unit of the integrated valve according to the first embodiment.
  • FIG. 9 is a schematic side view of a microvalve used in the pressure reducing unit of the integrated valve according to the first embodiment.
  • Fig. 10 is a cross-sectional view taken along the line __ in Fig. 9 and is a cross-sectional view showing a closed state of the microvalve of the pressure reducing unit.
  • Fig. 11 is a cross-sectional view showing a cross section X-X-I in Fig. 10.
  • Fig. 12 is a cross-sectional view taken along the line __ in Fig. 9 and is a cross-sectional view showing an opened state of the microvalve in the pressure reducing section.
  • Fig. 13 is a cross-sectional view showing a cross section taken along line X I I -X I I in Fig. 12.
  • FIG. 14 is an explanatory diagram for explaining the operation of the pressure reducing unit of the integrated valve according to the first embodiment.
  • FIG. 15 is a Mollier diagram for explaining the behavior of the refrigerant in the second heating mode of the heat pump cycle including the integrated valve according to the first embodiment.
  • FIG. 16 is a schematic cross-sectional view of the integrated valve according to the second embodiment.
  • FIG. 17 is an explanatory diagram for explaining the operation of the pressure reducing unit of the integrated valve according to the second embodiment.
  • FIG. 18 is a schematic cross-sectional view of the integrated valve according to the third embodiment, and is a cross-sectional view showing a state where the pressure reducing portion exerts a pressure reducing action.
  • FIG. 19 is a schematic cross-sectional view of the integrated valve according to the third embodiment and is a cross-sectional view showing a state in which the pressure reducing portion does not exert a pressure reducing action.
  • FIG. 20 Relationship between the open/closed state of the liquid refrigerant passage and the control pressure of the integrated valve according to the third embodiment. ⁇ 2020/175543 6 ⁇ (:171? 2020 /007719
  • FIG. 21 An enlarged view of a part of the integrated valve according to the third embodiment.
  • FIG. 22 A schematic exploded perspective view of a microvalve used for a differential pressure type driving member of an integrated valve according to a third embodiment.
  • FIG. 23 A schematic side view of a microvalve used for a differential pressure type driving member of an integrated valve according to a third embodiment.
  • Fig. 24 is a cross-sectional view taken along line XX-V in Fig. 23, showing a non-energized state to the microvalve.
  • FIG. 25 is a cross-sectional view showing the X X V -X X V cross section of FIG.
  • Fig. 26 is a cross-sectional view taken along line XX, V, V in Fig. 23 and is a cross-sectional view showing a state where electricity is applied to the microvalve.
  • FIG. 27 is a cross-sectional view showing the X X V I-X X V I cross section of FIG.
  • FIG. 28 is an explanatory diagram for explaining the operation of the microvalve used in the differential pressure type driving member of the integrated valve according to the third embodiment.
  • FIG. 29 is a schematic cross-sectional view of the integrated valve according to the fourth embodiment, and is a cross-sectional view showing a state of exhibiting a pressure reducing action.
  • FIG. 30 is an explanatory diagram for explaining the relationship between the control pressure and the open/closed state of the liquid refrigerant passage of the integrated valve according to the fourth embodiment.
  • FIG. 31 is an explanatory diagram for explaining the operation of the microvalve used in the differential pressure type driving member of the integrated valve according to the fourth embodiment.
  • FIG. 32 A schematic diagram showing an inner portion of a microvalve used in a pressure reducing portion of an integrated valve according to a fifth embodiment.
  • FIG. 33 is an enlarged view of a part of FIG. 32.
  • FIG. 34 is a schematic diagram showing the inside of a microvalve used in the integrated valve according to the sixth embodiment.
  • FIG. 35 An enlarged view of a part of FIG. 34.
  • the portion is uniformly the same or a matters described in the preceding embodiments are denoted by the same _ reference numerals, it may be omitted from the description. Further, in the embodiment, when only a part of the constituent elements is described, the constituent elements described in the preceding embodiments can be applied to the other parts of the constituent elements. The following embodiments can be partially combined with each other as long as the combination is not hindered, even if not explicitly stated.
  • a heat pump cycle that is, a vapor compression refrigeration cycle 10 including an integrated valve 14 of the present disclosure is used as a vehicle air conditioner for an electric vehicle that obtains a driving force for driving a vehicle from an electric motor for traveling.
  • the heat pump cycle 10 has a function of cooling or heating the air blown into the vehicle interior, which is the space to be air-conditioned, in the vehicle air conditioner 1. Therefore, the fluid to be heat exchanged in this embodiment is blast air.
  • the heat pump cycle 10 includes a refrigerant circuit in a cooling mode for cooling the vehicle interior as shown in Fig. 1 and a heating circuit for heating the vehicle interior as shown in Figs. 2 and 3.
  • the refrigerant circuit can be switched.
  • FIG. 1, FIG. 2, and FIG. 3 the flow of the refrigerant in each operation mode is indicated by a solid arrow.
  • the compressor 11 is arranged in the vehicle's Bonn, and in the heat pump cycle 10, the refrigerant is sucked, compressed and discharged.
  • the compressor 11 is a two-stage booster type electric compressor configured by accommodating a first compression mechanism section, a second compression mechanism section, and an electric motor for driving each compression mechanism section inside a housing. .. ⁇ 2020/175543 8 ⁇ (:171? 2020 /007719
  • the housing of the compressor 11 is provided with an intake port 1 13, an intermediate pressure port 11 1 and a discharge port 11 0.
  • the suction port 1 13 is a port for sucking low-pressure refrigerant into the first compression mechanism section.
  • the intermediate pressure port 11 is a port that allows the intermediate pressure refrigerant to flow into the housing and join with the refrigerant in the compression process from low pressure to high pressure.
  • the discharge port 110 is a port for discharging the high-pressure refrigerant discharged from the second compression mechanism section to the outside of the housing.
  • the intermediate pressure port 11 13 is connected to the refrigerant discharge port side of the first compression mechanism section. The operation of the electric motor of the compressor 11 is controlled by a control signal output from a control device 40 described later.
  • the compressor 11 an example in which two compression mechanism units are housed in one housing is illustrated, but the present invention is not limited to this.
  • the compressor 11 may be of any other type as long as it can flow the intermediate pressure refrigerant from the intermediate pressure port 11 into the refrigerant in the compression process.
  • the refrigerant inlet side of the indoor condenser 12 is connected to the discharge port 110 of the compressor 11.
  • the indoor condenser 12 is a radiator arranged in an air conditioning case 31 of an indoor air conditioning unit 30 to be described later, which radiates the high temperature and high pressure refrigerant discharged from the compressor 11.
  • the refrigerant outlet side of the indoor condenser 12 is connected to the inlet side of a high-stage expansion valve 13 which decompresses the high-pressure refrigerant flowing out of the indoor condenser 12 to an intermediate-pressure refrigerant.
  • the high-stage expansion valve 13 is composed of an electric variable throttle whose throttle opening can be changed.
  • the high-stage expansion valve 13 can be configured so that the throttle opening is fully opened so that the refrigerant depressurizing action is not exerted.
  • the operation of the high-stage expansion valve 13 is controlled by the control signal output from the control device 40.
  • the refrigerant inlet 1414 of the integrated valve 14 is connected to the outlet side of the high-stage expansion valve 13.
  • the integrated valve 14 integrally configures a part of the components necessary for the heat pump cycle 10 to function as a gas injection cycle. ⁇ 2020/175543 9 ⁇ (: 171-1? 2020/007719
  • the integrated valve 14 also functions as a circuit switching unit that switches the refrigerant circuit of the refrigerant circulating in the cycle.
  • the integrated valve 14 includes a gas-liquid separation space 1 4 1 13 for separating a gas-liquid refrigerant, an opening/closing member 16 for opening and closing a gas refrigerant passage 1 4 2 for flowing a gas-phase refrigerant, a liquid flowing a liquid-phase refrigerant.
  • the liquid-side valve body 181, which opens and closes the refrigerant passage 1 41, and the decompression unit 17 for decompressing the liquid-phase refrigerant are integrally configured.
  • FIGS. 4, 5, and 6 indicate the vertical direction when the integrated valve 14 is installed in the vehicle air conditioner 1.
  • the integrated valve 14 forms a shell and has a body _ 1440 inside which the opening/closing member 16 and the liquid side valve body 1 8 1 are housed.
  • the body 140 is made of a metal material such as an aluminum alloy.
  • the body 1 4 0 is composed of a lower body 1 4 1 arranged on the lower side and an upper body _ 1 4 2 mounted and fixed on the upper side of the lower body 1 4 1.
  • the lower body 1 4 1 is formed of a substantially rectangular parallelepiped block body, and a refrigerant inlet port 1 4 1 3 is formed on the outer peripheral side wall surface thereof to allow the refrigerant flowing out of the high-stage expansion valve 1 3 to flow into the inside. There is.
  • the refrigerant inlet port 1 41 3 communicates with a gas-liquid separation space 1 4 1 13 formed inside the lower body 1 4 1.
  • the gas-liquid separation space 1441 is formed in a substantially columnar shape whose axial direction extends vertically.
  • the lower body 1 41 is formed with an outflow hole 1 41 0 through which the liquid-phase refrigerant separated in the gas-liquid separation space 1 4 1 flows to the liquid refrigerant passage 1 4 1 side.
  • the liquid cooling medium passage 1 4 1 is arranged below the gas-liquid separation space 1 4 1 and the liquid-phase refrigerant separated in the gas-liquid separation space 1 4 1 13 flows out of the integrated valve 1 4. This is a refrigerant passage leading to the liquid flow outlet 1 4 1 6 side.
  • a valve seat portion 1 41 1 is formed in the middle of the liquid refrigerant passage 1 4 1 in the lower body 1 4 1 for contacting and separating a liquid side valve body 1 8 1 described later. Inside the liquid refrigerant passage 1 41, the liquid refrigerant passage 1 4 1 is opened by contacting with and separating from the valve seat portion 1 41 1. ⁇ 2020/175 543 10 (:171? 2020/007719
  • the liquid-side valve body 181, which is closed, and the liquid-side valve body 1 81 are accommodated therein, for example, a spring 181 3 including a coil panel for applying a load to the direction in which the liquid refrigerant passage 1 4 1 is closed.
  • the liquid side valve body 1 81 is connected to the solenoid actuator via the shaft 1 81.
  • the solenoid 182 is an electromagnetic mechanism that displaces a movable part by generating an electromagnetic force by supplying electric power, and its operation is controlled by a control voltage output from the control device 40. ..
  • the solenoid 182 constitutes a drive member that drives the liquid side valve body 181.
  • the liquid side valve body 181 is displaced and the liquid refrigerant passage 1414 is opened. .. Further, for example, when the control device 40 stops the power supply to the solenoid 182, as shown in FIG. 6, the liquid side valve body 181 closes the liquid refrigerant passage 141.
  • the lower body 1 41 is provided with a pressure reducing portion 17 in parallel with the refrigerant passage formed inside the valve seat portion 1 41 1.
  • the decompression unit 17 decompresses the liquid-phase refrigerant separated in the gas-liquid separation space 1 4 1 when the liquid-side valve body 1 8 1 closes the liquid-refrigerant passage 1 4 1, and the liquid outlet port. It is intended to be discharged to the 1 4 1 6 side.
  • the decompression section 17 is composed of a fixed throttle 170 having a fixed throttle opening, and a valve module X0 including a micro valve X1 for adjusting and changing the throttle opening of the decompression section 17.
  • the fixed throttle 1700 has a liquid upstream passage 1 4 1 1 which is the upstream side of the valve seat portion 1 41 1 of the liquid refrigerant passage 1 4 1 and a liquid which is the downstream side of the valve seat portion 1 4 1 1 Communicate with the downstream passage 1 4 1 2.
  • a nozzle or an orifice can be used as the fixed throttle 170. The details of the valve module will be described later.
  • the integrated valve 14 configured as described above opens and closes the liquid refrigerant passage 1 4 1 by the liquid side valve body 1 8 1 to remove the liquid phase refrigerant separated in the gas-liquid separation space 1 4 1 In the throttle state where the pressure is reduced, and the refrigerant that has passed through the gas-liquid separation space 1 4 1 is not reduced in pressure. ⁇ 2020/175543 1 1 ⁇ (: 171-1? 2020 /007719
  • the upper body 1 4 2 is formed of a substantially rectangular block body and covers the upper side of the gas-liquid separation space 1 4 1 13.
  • the upper body _ 1 4 2 is formed with a gas outlet 1 4 2 3 for letting the gas-phase refrigerant flow out to the intermediate pressure port 11 1 of the compressor 11 1.
  • the upper body _ 1 4 2 has a gas refrigerant passage 1 4 2 stub that guides the gas-phase refrigerant separated in the gas-liquid separation space 1 4 1 s to the gas outlet 1 4 2 3 side.
  • the gas refrigerant passage 1 4 2 13 extends horizontally toward the gas outlet 1 4 2 3.
  • the upper body 1 42 is provided with a round tubular pipe portion 1 420 arranged coaxially with the gas-liquid separation space 1 4 1.
  • a refrigerant outflow section 1 4 2 ⁇ 1 for letting out the gas-phase refrigerant separated in the gas-liquid separation space 1 41 from the gas-liquid separation space 1 41. It is open.
  • Inside the pipe section 142 there is formed an internal pipe passage 1 420 1 for guiding the refrigerant flowing out from the refrigerant outlet 1 4 2 to the gas refrigerant passage 1 4 2.
  • a main valve seat portion 1 42 2 is formed in the gas refrigerant passage 1 42 2 to contact and separate one end portion of a main valve member 1 61 described later.
  • An opening/closing member 16 that opens and closes the gas refrigerant passage 1 42 2 is housed in the gas refrigerant passage 1 42 2 at a position opposite to the gas outlet 1 4 2 3.
  • the upstream side of the main valve seat portion 1 42 2 of the gas refrigerant passage 1 4 2 is the gas upstream passage 1 4 2 9 and the main valve seat portion 1 4 2 9 Gas downstream passage 1 4 2 II is located on the downstream side.
  • the opening/closing member 16 includes a main valve member 1 61, a main elastic member 1 62, a sub valve member 1 64, and a sub elastic member 1 6 5.
  • the pilot valve mechanism is configured to displace the main valve member 1 61 by changing the pressure acting on the valve member 1 61.
  • the main valve member 1 61 has a position where one end where the seal member 1 61 is provided contacts the main valve seat portion 1 42 2 and a position where it is separated from the main valve seat portion 1 4 2
  • the gas refrigerant passages 1 4 2 13 are opened and closed by displacing between them. ⁇ 2020/175 543 12 ⁇ (:171? 2020 /007719
  • the main valve member 1 61 has a gas refrigerant passage at its one end that contacts and separates from the main valve seat portion 1
  • the main valve member 1 61 has a body portion 1 61 3 at the other end portion on the opposite side of the one end portion which comes in contact with and separates from the main valve seat portion 1 4 2.
  • the body portion 1 61 3 is a member for separating the gas upstream passage 1 4 2 9 and the back pressure chamber 1 4 2 6 into which the pressure in the gas upstream passage 1 4 29 is introduced.
  • the body 161 3 is formed in a cylindrical shape with an outer diameter slightly smaller than the inner diameter of the gas upstream passage 1 4 29, and slides on the inner wall surface of the gas upstream passage 1 4 29. It is possible.
  • the main valve member 1 61 is formed with a communication passage 1 61 1 which connects the gas downstream passage 1 4 2 and the back pressure chamber 1 4 26 .
  • the opening on the back pressure chamber 1 4 26 side of the communication passage 1 61 constitutes a pilot hole that is opened and closed by the sub valve member 1 64.
  • a main elastic member 1 6 2 composed of a coil panel or the like that applies a load to the main valve member 1 6 1 in a direction to open the gas refrigerant passage 1 4 2 It is housed.
  • the back pressure chamber 1 4 2 6 has a control member 1 6 3 for restricting the displacement of the main valve member 1 6 1 and a sub-passage 1 6 1 that opens and closes the communication passage 1 6 1 which is formed in the main valve member 1 6 1.
  • a valve member 1 64 is arranged.
  • the restricting member 163 is a bottomed tubular member having an outer diameter that matches the inner diameter of the gas refrigerant passage 1 42.
  • the restriction member 1 63 also closes the opening of the upper body _1 4 2 on the side opposite to the gas outlet 1 4 2 3. Functions as a member.
  • the sub-valve member 1 64 is slidably supported on the inner wall surface of the regulating member 1 63, and the opening of the communication passage 1 6 1 claw formed in the main valve member 1 6 1 is closed.
  • the communication passage 1 6 1 13 is opened and closed by displacing it between a closed position where it is closed and an open position where the opening is opened.
  • the sub-valve member 1 64 has a conical shape at one end on the side facing the communication passage 1 6 1.
  • the auxiliary valve member 1 64 is configured such that one end facing the communication passage 1 61 1 receives the pressure of the back pressure chamber 1 4 2 6 in the direction of opening the communication passage 1 6 1 1 ⁇ 2020/175 543 13 ⁇ (:171? 2020 /007719
  • the sub valve member 1 64 has a pressure receiving surface at one end thereof for receiving the pressure of the back pressure chamber 1 4 26 in the direction of opening the communication passage 1 6 1.
  • the sub-valve member 1 64 has the other end opposite to the one end formed in a conical shape in the direction of closing the communication passage 1 6 1 sill so that the pressure in the pressure chamber 1 4 2 (described later) is increased. Is configured to receive. That is, the sub valve member 1 64 has a pressure receiving surface at the other end that receives the pressure of the pressure chamber 1 4 2 1 in the direction of closing the communication passage 1 6 1.
  • the pressure chamber 1422 is a space formed between the other end of the sub valve member 164 and the inner wall surface of the regulating member 163.
  • the pressure chamber 1 4 2 is connected to a pressure introduction passage 19 communicating with the refrigerant passage downstream of the pressure reducing portion 17 in the refrigerant flow direction, and the refrigerant flow of the pressure reducing portion 17 is connected via this pressure introduction passage 19. Downstream pressure is introduced.
  • the pressure chamber 1 4 2 2 contains a sub elastic member 1 6 5 composed of a coil panel or the like for applying a load to the sub valve member 1 6 4 in the direction of closing the communication passage 1 6 1. There is.
  • the opening/closing member 16 configured as described above is connected to the back pressure chamber 1 4 2 6 and the gas downstream passage 1 42.
  • the main valve member 1 61 is displaced in the valve opening direction by communicating with each other and eliminating the difference in pressure acting before and after the main valve member 1 61.
  • the opening/closing member 16 opens the gas refrigerant passage 1 42.
  • the sub-valve member 1 64 is displaced to a position separated from the opening of the communication passage 1 61 1 when a pressure difference is generated before and after the pressure reducing portion 17.
  • valve module ⁇ that constitutes the pressure reducing unit 17, ⁇ 2020/175 543 14 ⁇ (:171? 2020 /007719
  • valve module ⁇ is configured integrally with the lower body 1 41.
  • the lower body 1 41 constitutes an object to be attached to which the micro valve X 1 is attached.
  • first concave portion 1 4 3 and a second concave portion 1 4 4 into which a first protruding portion X 2 1 and a second protruding portion X 2 2 described later are fitted.
  • first recess 1 4 3 At the bottom of the first recess 1 4 3 is formed a through hole 1 4 3 3 for communicating the first recess 1 4 3 with the liquid upstream passage 1 4 1 1.
  • a through hole 1 4 4 3 is formed in the bottom of the second recess 1 4 4 to allow the second recess 1 4 4 to communicate with the liquid downstream passage 1 4 1 2.
  • the valve module ⁇ has a micro valve X I, a valve casing 2, a sealing member X 3, two ⁇ rings X 4, X 5, and two electric wirings X 6, X 7.
  • the micro valve XI is a plate-shaped valve component, and is mainly composed of a semiconductor chip.
  • the microvalve XI may or may not have components other than the semiconductor chip. Therefore, the micro valve X 1 can be constructed in a small size.
  • Micro valve For example, the length in the longitudinal direction orthogonal to the thickness direction is 1 And the length in the lateral direction orthogonal to both the longitudinal direction and the thickness direction is, for example, 5 However, it is not limited to this. Opening and closing is switched by switching between energized and de-energized micro valve X1.
  • the micro valve XI is a normally closed valve that opens when energized and closes when de-energized.
  • the electric wiring 6, 6 extends from the surface of the two sides of the microvalve X1 opposite to the valve casing X2, and the sealing member X3, valve It passes through the casing X 2 and is connected to the power supply outside the valve module X 0. As a result, electric power is supplied from the power supply to the micro valve X 1 through the electric wiring X 6 and X 7.
  • the valve casing 2 is a resin casing that houses the microvalve X 1.
  • the valve casing 2 is mainly made of polyphenylene sulfide. ⁇ 2020/175 543 15 ⁇ (:171? 2020 /007719
  • the valve casing 2 is configured such that the coefficient of linear expansion is a value between the coefficient of linear expansion of the microvalve X 1 and the coefficient of linear expansion of the lower body 1 41 1.
  • the valve casing X 2 constitutes a component mounting portion for mounting the micro valve X 1 to the lower body 1 41.
  • the valve casing X 2 is a concave box body having a bottom wall on one side and an open side on the other side.
  • the bottom wall of the valve casing X 2 is interposed between the microvalve X 1 and the lower body 1 41 so that the microvalve X I and the mouth body 1 1 4 1 do not come into direct contact with each other.
  • one surface of the bottom wall contacts and is fixed to the lower body 1 41 1, and the other surface contacts and is fixed to one of the two plate surfaces of the microvalve X 1.
  • the valve casing X 2 can absorb the difference in linear expansion coefficient between the micro valve X 1 and the lower body 1 41. This is because the linear expansion coefficient of the valve casing X 2 is a value between the linear expansion coefficient of the micro valve X 1 and the linear expansion coefficient of the lower body 1 41 1.
  • the bottom wall of the valve casing X 2 projects from the plate-shaped base portion X 20 facing the microvalve X 1 and the base portion X 20 in a direction away from the microvalve X 1. It has a pillar-shaped first protruding portion 21 and a second protruding portion X 22.
  • the first protruding portion 21 and the second protruding portion X2 2 are fitted in the recesses formed in the lower body 1 41.
  • the first projecting portion 21 is formed with a first communicating hole 1 which penetrates from the end on the micro valve X I side to the end on the bottom side of the first recess 1 43.
  • the second projecting portion 22 is formed with a second communicating hole XV2 penetrating from the end on the micro valve X1 side to the end on the bottom side of the second recess 1144.
  • the sealing member X3 is a member made of an epoxy resin that seals the other open side of the valve casing X2.
  • the sealing member X 3 covers the plate surface on the opposite side of the bottom wall side of the valve casing X 2 among the two plate surfaces on the front and back of the micro valve XI.
  • the sealing member X3 covers the electrical wiring X6 and X7, ⁇ 2020/175 543 16 ⁇ (:171? 2020 /007719
  • the sealing member X 3 is formed by resin potting or the like.
  • the ring X4 is attached to the outer periphery of the first protrusion X21,
  • the ring X5 is attached to the outer periphery of the second protrusion X22 and seals between the lower body 1 41 and the second protrusion X22 to prevent the leakage of the refrigerant to the outside of the integrated valve 14. Suppress.
  • the micro valve X 1 is a MEMS including a first outer layer X 1 1, a middle layer X 1 2, and a second outer layer X 1 3, both of which are semiconductors.
  • MEMS Micro Electro Mechanical Systems.
  • the first outer layer X11, the middle layer X12, and the second outer layer X13 are rectangular plate-shaped members each having the same outer shape, and the first outer layer X11, the middle layer X12, and the first layer X12. 2
  • the outer layers are laminated in order of X13.
  • the second outer layer X13 is arranged on the side closest to the bottom wall of the valve casing X2.
  • the structures of the first outer layer X11, the intermediate layer X12, and the second outer layer X13, which will be described later, are formed by a semiconductor manufacturing process such as chemical etching.
  • the first outer layer X 11 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 8, the first outer layer X 11 has two through holes X 14 and X 15 penetrating the front and back. The ends of the electric wires X6 and X7 on the side of the microvalve X1 are inserted into the through holes X14 and X15, respectively.
  • the second outer layer X13 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 8, FIG. 10, and FIG. 11, the second outer layer X 13 is provided with first refrigerant holes X 16 and second refrigerant holes X 17 penetrating both sides. As shown in Fig. 11, the first refrigerant hole X 1 6 communicates with the first communication hole XV 1 of the valve casing X 2, and the second refrigerant hole X 1 7 communicates with the second communication hole XV of the valve casing X 2. Connect to 2.
  • the hydraulic diameter of each of the first refrigerant hole X 16 and the second refrigerant hole X 17 is, for example, ⁇ 2020/175 543 17 ⁇ (:171? 2020 /007719
  • the first refrigerant hole X I 6 and the second refrigerant hole X I 7 are the first fluid hole and the second fluid hole, respectively.
  • the intermediate layer X 12 is a conductive semiconductor member, and is sandwiched between the first outer layer X 11 and the second outer layer X 13. Since the intermediate layer XI 2 contacts the oxide film of the first outer layer XI 1 and the oxide film of the second outer layer X 1 3, it is electrically non-conductive with both the first outer layer X 1 1 and the second outer layer X 1 3. Is. As shown in FIG. 10, the middle layer XI 2 includes a first fixing portion X 1 2 1, a second fixing portion XI 2 2, a plurality of first ribs XI 2 3 and a plurality of second ribs X 1. 2 4, spine XI 25, arm XI 26, beam XI 27, and moving part X 1 28.
  • the first fixing portion X 1 2 1 is a member fixed to the first outer layer X 11 and the second outer layer X 1 3.
  • the 1st fixed part X 1 2 1 is the 2nd fixed part X 1 2 2, the 1st rib X 1 2 3, the 2nd rib XI 2 4, the spine XI 25, the arm X 1 2 6, the beam X 1 2 7 ,
  • the movable part X 1 2 8 is formed so as to surround the same one fluid chamber X 1 9.
  • the fluid chamber X 19 is a chamber surrounded by the first fixed portion X 1 21 1, the first outer layer X 11 and the second outer layer X 1 3. At least a part of the refrigerant passing through the liquid refrigerant passage 1 41 1 circulates in the fluid chamber X 19.
  • the first fixed part X 1 2 1, the first outer layer X 11 and the second outer layer X I 3 correspond to the base as a whole.
  • the electric wirings 6, X 7 are electric wirings for changing and displacing the temperatures of the plurality of first ribs X 1 2 3 and the plurality of second ribs X 1 2 4.
  • the first fixing portion X1 2 1 is fixed to the first outer layer X1 1 and the second outer layer X1 3 by the refrigerant flowing from the fluid chamber XI9 to the first refrigerant hole XI6 and the second refrigerant hole XI7. It is carried out in a form that suppresses leakage from the microvalve X 1 through other than.
  • the second fixing portion X 1 2 2 is fixed to the first outer layer X 11 and the second outer layer X 1 3.
  • the second fixed portion X 1 2 2 is surrounded by the first fixed portion X 1 2 1 and is arranged apart from the first fixed portion X 1 2 1.
  • arm X 1 2 6 is the first outer layer X 1 1, ⁇ 2020/175 543 18 ⁇ (:171? 2020 /007719
  • the spine X I 25 has the shape of an elongated rod that extends in the lateral direction of the rectangular shape of the intermediate layer X 1 2. One end of the spine X I 25 in the longitudinal direction is connected to the beam X 1 27.
  • the plurality of first ribs X I 23 are arranged on one side of the spine X I 25 in the direction orthogonal to the longitudinal direction of the spine X I 25. Then, the plurality of first ribs X I 23 are arranged in the longitudinal direction of the spine X I 25.
  • Each 1st rib X 1 23 has an elongated rod shape and can expand and contract depending on the temperature.
  • Each of the first ribs X 1 23 is connected to the first fixing portion X 1 21 at one end in the longitudinal direction and is connected to the spine X I 25 at the other end. Further, each first rib XI 23 is offset toward the beam X 1 27 side in the longitudinal direction of the spine X 1 25 as the first fixing portion X 1 21 side approaches the spine X 1 25 side. , Is skewed to the Spine XI 25.
  • the plurality of first ribs X I 23 extend parallel to each other.
  • the plurality of second ribs X 124 are arranged on the other side of the spine X I 25 in the direction orthogonal to the longitudinal direction of the spine X 125.
  • the plurality of second ribs X I 24 are arranged in the longitudinal direction of the spine X I 25.
  • Each second rib X 1 24 has an elongated rod shape and can expand and contract depending on the temperature.
  • Each second rib X124 is connected to the second fixing portion X122 at one end in the longitudinal direction and is connected to the spine XI25 at the other end. Then, each second rib XI 24 is offset so as to be offset toward the beam X 1 27 side in the longitudinal direction of the spine X 1 25 as the second fixing portion XI 22 side is closer to the spine XI 25 side. It is skewed to XI 25. Then, the plurality of second ribs XI 24 extend parallel to each other.
  • the plurality of first ribs 1 23, the plurality of second ribs X 1 24, and the spine XI 25 collectively correspond to the drive unit. ⁇ 2020/175 543 19 ⁇ (:171? 2020 /007719
  • the arm X1 26 has an elongated rod shape that extends non-orthogonally and parallel to the spine X1 25. One end of the arm X I 2 6 in the longitudinal direction is connected to the beam X 1 27, and the other end is connected to the first fixed portion X 1 2 1.
  • the beam X 1 27 has an elongated rod shape extending in a direction intersecting the spine X I 2 5 and the arm X I 26 at about 90°. One end of the beam X 1 27 is connected to the movable part X 1 28. Arm X I 2 6 and beam X I 2 7 as a whole correspond to the amplification section.
  • connection position X 9 2 of the 1 2 7 and the connection position X 3 of the beam X 1 27 and the movable part X 1 2 8 are arranged in this order along the longitudinal direction of the beam X 1 27. If the connection point between the first fixed part X 1 2 1 and the arm X 1 26 is hinge X 0, from the hinge X 0 to the connection position X 2 in the plane parallel to the plate surface of the intermediate layer X 1 2. The straight line distance from hinge X 0 to connection position X 3 is longer than the straight line distance of.
  • the movable portion X 1 2 8 is for adjusting the pressure of the refrigerant in the fluid chamber X 1 9.
  • the outer shape of the movable portion X 1 28 has a rectangular shape that extends in the direction of approximately 90 ° with respect to the longitudinal direction of the beam X 1 27. This movable part XI 28 can move integrally with the beam XI 27 in the fluid chamber X 19.
  • the movable portion X 1 28 makes the first refrigerant hole X 16 and the second refrigerant hole XI 7 communicate with each other through the fluid chamber XI 9 when in a certain position, At the position of, the first refrigerant hole X 16 and the second refrigerant hole XI 7 are shut off in the fluid chamber XI 9.
  • the movable portion X 1 2 8 has a frame shape surrounding a through hole 1 2 0 penetrating the front and back of the intermediate layer XI 2. Therefore, the through-hole X 1 2 0 also moves integrally with the movable portion X 1 2 8.
  • the through hole X 1 20 is part of the fluid chamber X 1 9.
  • the first application point X1 29 near the portion of the first fixed portion X1 21 that is connected to the plurality of first ribs X1 2 3 has the first application point X1 2 9 shown in FIG. 1
  • the end of the electric wiring X6 that has passed through the through hole X14 of the outer layer X11 is connected to the microvalve X1 side end. Also ⁇ 2020/175 543 20 ⁇ (:171? 2020 /007719
  • the second application point X1 3 0 of the second fixed part X 1 2 2 is the microvalve X 1 of the electrical wiring X 7 that passes through the through hole X 1 5 of the first outer layer X 1 1 shown in FIG. The side ends are connected.
  • valve module X 0 When the micro valve X 1 is energized, a voltage is applied between the electric wiring X 6, X 7 and the first application point X I 29 and the second application point X 130. Then, a current flows through the plurality of first ribs 1 2 3 and the plurality of second ribs X 1 2 4. Due to this current, the plurality of first ribs X I 2 3 and the plurality of second ribs X I 2 4 generate heat and their temperatures rise. As a result, each of the plurality of first ribs 1 2 3 and the plurality of second ribs X 1 2 4 expands in the longitudinal direction.
  • the plurality of first ribs XI 2 3 and the plurality of second ribs XI 2 4 urge the spine XI 25 toward the connecting position 2 side.
  • the biased spine X I 2 5 pushes the beam X 1 2 7 at the connecting position 2.
  • the connecting position X 2 corresponds to the biasing position.
  • the member composed of the beam X 1 27 and the arm X 1 2 6 integrally changes its posture with the hinge ⁇ as a fulcrum and the connection position X 2 as a force point.
  • the moving part X 1 2 8 connected to the end of the beam X 1 2 7 opposite to the arm X 1 2 6 also has its longitudinal side on which the spine XI 2 5 pushes the beam XI 2 7.
  • the movable portion X 1 28 reaches a position where the tip in the moving direction abuts the first fixed portion X 1 21 as shown in FIGS. 12 and 13.
  • this position of the movable part X1 28 is referred to as the energized position.
  • the beam X 1 27 and the arm X 1 26 function as a lever having the hinge ⁇ as a fulcrum, the connection position 2 as a force point, and the connection position 3 as an action point.
  • the straight line distance from the hinge X 0 to the connection position 3 is longer than the straight line distance from the hinge X 0 to the connection position X 2 in the plane parallel to the plate surface of the intermediate layer XI 2. Therefore, the movement amount of the connection position X3, which is the point of action, is larger than the movement amount of the connection position 2, which is the force point. ⁇ 2020/175 543 21 ⁇ (:171? 2020 /007719
  • the micro valve X1 opens.
  • the first refrigerant hole X I 6, the through hole X 120, and the second refrigerant hole X I 7 are refrigerant passages through which the refrigerant flows in the micro valve X 1 when the micro valve X 1 is opened.
  • the flow path of the refrigerant in the micro valve X1 has a II vane structure. Specifically, the refrigerant flows into the micro valve X 1 from one surface of the micro valve X 1, passes through the micro valve X 1, and flows from the same surface of the micro valve X 1 to the micro valve X 1. It leaks out.
  • the flow path of the refrigerant in the valve module X 0 also has the II opening structure. Specifically, the refrigerant flows into the valve module ⁇ from one surface of the valve module ⁇ , passes through the valve module X 0, and from the same side surface of the valve module ⁇ . ⁇ It leaks out.
  • the direction orthogonal to the plate surface of the intermediate layer X 1 2 is the laminating direction of the first outer layer X I 1, the intermediate layer X I 2, and the second outer layer X 1 3.
  • the plurality of second ribs X I 2 4 urge the spine X I 2 5 to the side opposite to the connection position 2.
  • the biased spine X 1 2 5 pulls the beam X 1 2 7 at the connecting position X 2.
  • the member consisting of the beam X 1 27 and the arm X I 26 changes its posture as a unit, with the hinge ⁇ as the fulcrum and the connecting position 2 as the fulcrum.
  • the moving part XI 2 8 connected to the end of the beam X 1 2 7 opposite to the arm XI 2 6 also moves in the longitudinal direction on the side where the spine XI 2 5 pulls the beam XI 2 7. , Moving.
  • the movable part X I 28 reaches a position where it does not contact the first fixed part X 1 21 as shown in FIGS. 10 and 11.
  • this position of the movable part X1 28 is referred to as the non-energized position.
  • the pressure reducing portion 17 configured in this manner has a flow passage area of the micro valve X
  • the flow passage area of the fixed throttle 1700 is obtained when the power is not supplied to 1, and the size is the sum of the flow passage area of the fixed diaphragm 170 and the flow passage area of the valve module X 0 when the power is supplied. That is, as shown in Fig. 14, the decompression section 17 has a small opening 3 1 when the micro valve X 1 is not energized and a large opening 3 2 when energized. Become . In this way, the pressure reducing section 17 can adjust the throttle opening of the pressure reducing section 17 by switching between energization and de-energization of the micro valve X 1. Specifically, the decompression unit 17 can reduce the throttle opening by stopping the energization of the micro valve X 1.
  • the outdoor heat exchanger 20 functions as a heat absorber that evaporates the refrigerant in the first and second heating modes to exert an endothermic effect, and functions as a radiator that dissipates the refrigerant in the cooling mode and the like.
  • the refrigerant inlet side of the low-stage expansion valve 22 is connected to the refrigerant outlet side of the outdoor heat exchanger 20.
  • the low-stage expansion valve 22 is for decompressing the refrigerant flowing out of the outdoor heat exchanger 20 and flowing into the indoor evaporator 23 in the cooling mode.
  • the basic configuration of the low-stage expansion valve 22 is the same as that of the high-stage expansion valve 13 and its operation is controlled by the control signal output from the control device 40.
  • the refrigerant inlet side of the indoor evaporator 23 is connected to the outlet side of the low-stage expansion valve 22.
  • the indoor evaporator 23 is arranged on the upstream side of the blown air flow of the indoor condenser 12 in the air conditioning case 31 described later.
  • the indoor evaporator 23 is a heat exchanger that cools the air blown into the vehicle compartment by evaporating the refrigerant and exerting an endothermic effect in the cooling mode and the dehumidifying and heating mode.
  • the inlet side of the accumulator 24 is connected to the refrigerant outlet side of the indoor evaporator 23.
  • the accumulator 24 separates the gas-liquid refrigerant flowing into the accumulator 24 and stores the excess refrigerant.
  • the suction port 1 13 of the compressor 11 is connected to the vapor phase refrigerant outlet side of the accumulator 24. Therefore, the indoor evaporator 23 is connected so as to flow out to the suction port 1 13 3 side of the compressor 11 1.
  • a passage opening/closing valve 27 is arranged in the bypass passage 25.
  • the passage opening/closing valve 27 is an electromagnetic valve that opens/closes the bypass passage 25, and its opening/closing operation is controlled by a control signal output from the control device 40.
  • the passage opening/closing valve 27 has a function of switching the refrigerant passage by opening/closing the bypass passage 25. Therefore, the passage opening/closing valve 27 of the present embodiment constitutes a switching portion of the refrigerant circuit.
  • the indoor air conditioning unit 30 is located inside the instrument panel at the front of the passenger compartment.
  • the indoor air conditioning unit 30 has an air conditioning case 3 1 that forms an air passage for blown air that is blown into the vehicle interior.
  • the air passage accommodates the blower 32, the indoor condenser 12 and the indoor evaporator 23 described above.
  • An inside/outside air switching device 33 is arranged on the most upstream side of the air flow of the air conditioning case 31 to switch between the air inside the vehicle (ie, the inside air) and the outside air.
  • the inside/outside air switching device 33 changes the air volume ratio between the air volume of the inside air introduced into the air conditioning case 31 and the air volume of the outside air.
  • a blower 32 for blowing the air taken in through the inside/outside air switching device 33 toward the vehicle interior is arranged on the downstream side of the inside/outside air switching device 33 in the air flow.
  • the blower 32 is an electric blower in which a fan is driven by an electric motor, and the rotation speed is controlled by a control voltage output from the control device 40.
  • the indoor evaporator 23 and the indoor condenser 12 described above are arranged in the order of the indoor evaporator 2 3 ® indoor condenser 1 2 with respect to the flow of the blown air. It is located in. Further, in the air conditioning case 31 there is provided a bypass passage 35 that allows the blown air after passing through the indoor evaporator 23 to flow around the indoor condenser 12 2.
  • An air mix door 34 is arranged downstream of the indoor evaporator 23 in the air flow and upstream of the indoor condenser 12 in the air flow.
  • the air mix door 34 flows into the indoor condenser 12 by adjusting the air flow rate of the blown air passing through the indoor condenser 12 side and the air flow rate passing through the bypass passage 35. It is a flow rate adjusting means for adjusting the flow rate of blown air.
  • a merging space 36 is provided in which unheated blast air that passes through the merging space merges. Therefore, the air mix door 34 adjusts the air volume ratio between the air volume passing through the indoor condenser 12 and the air volume passing through the bypass passage 35 so that the blast air in the merging space 36 is The temperature is adjusted. The operation of the air mix door 34 is controlled by a control signal output from the control device 40.
  • an opening hole through which the blast air that has merged in the merging space 36 is blown into the vehicle interior, which is the space to be cooled.
  • this opening hole is a defroster opening hole that blows air-conditioning air toward the inner surface of the front window glass of the vehicle 3 7 3 and a face opening hole that blows air-conditioning air toward the upper half of the passenger in the passenger compartment.
  • 10 ⁇ Floor opening hole 37 0 is provided to blow air-conditioned air toward the feet of passengers.
  • defroster doors 3 8 3, face doors 3 8 13, and foot doors are located upstream of the air flow of the defroster opening holes 3 7 3, the face opening holes 3 7 and the foot opening holes 3 7 0, respectively.
  • 380 are arranged. The operation of these defroster doors 383, face doors 381 and foot doors 380 is controlled by control signals output from the control device 40.
  • defroster opening holes 3 7 3 and face opening holes 3 7 The air flow downstream side of the foot opening hole 370 and the foot opening hole 370 are connected to the face air outlet, foot air outlet, and defroster air outlet provided in the passenger compartment through the ducts that form the air passages.
  • the control device 40 is composed of a microcomputer including a processor, a memory and the like and its peripheral circuits.
  • the control device 40 performs various calculations and processings based on the air conditioning control program stored in the memory, and controls the operation of various air conditioning control devices connected to the output side.
  • a sensor group 41 for air conditioning control is connected to the input side of the control device 40.
  • the sensor group for air conditioning control 41 consists of an inside air sensor, an outside air sensor, and a solar sensor. ⁇ 2020/175 543 26 ⁇ (:171? 2020 /007719
  • It consists of a temperature sensor, evaporator temperature sensor, blown air temperature sensor, discharge pressure sensor, discharge temperature sensor, condenser temperature sensor, suction pressure sensor, suction temperature sensor, etc.
  • an operation panel (not shown) arranged near the instrument panel in the front part of the vehicle compartment is connected to the input side of the control device 40, and an air conditioning operation switch group 4 2 provided on this operation panel is operated.
  • An operation signal is input.
  • the air conditioning operation switch group 42 includes, for example, an operation switch of the vehicle air conditioner 1, a vehicle interior temperature setting switch for setting the vehicle interior temperature, a mode changeover switch for switching the operation mode, and the like.
  • the vehicle air conditioner 1 switches to the cooling mode or the heating mode in response to the operation signal of the mode selection switch.
  • control device 40 sets the high-stage side expansion valve 13 to the fully open state, the low-stage side expansion valve 22 to the fully closed state, and the passage opening/closing valve 27 to the closed state. Further, the control device 40 sets the solenoid 182 of the integrated valve 14 to the energized state and the micro valve X 1 described later to the non-energized state.
  • control device 40 controls the control device 40 based on the detection signal of the air conditioning control sensor group 41 and the operation signal of the air conditioning operation switch group 4 2 described above. Controls various air conditioning control devices connected to the output side.
  • control device 40 controls the air mix door 34 so that the air passage of the indoor condenser 12 is closed. As a result, the total flow rate of the blown air after passing through the indoor evaporator 23 passes through the bypass passage 35.
  • the gas-liquid separation space 1 4 1 of the integrated valve 14 does not separate the refrigerant gas-liquid.
  • Gas-phase refrigerant flows into the liquid refrigerant passage 1 4 1.
  • the gas-phase refrigerant flowing into the liquid refrigerant passage 1 41 is not depressurized from the liquid outlet 1 4 1 6 because the liquid side valve body 1 8 1 opens the liquid refrigerant passage 1 4 1. leak.
  • the refrigerant flowing into the outdoor heat exchanger 20 exchanges heat with the outside air blown from the blower fan 21 to radiate heat.
  • the refrigerant that has flowed out of the outdoor heat exchanger 20 flows into the low-stage side expansion valve 22 that is in the throttled state because the passage opening/closing valve 27 is closed, and the refrigerant is decompressed until it becomes low-pressure refrigerant. Is inflated.
  • the low-pressure refrigerant decompressed by the low-stage expansion valve 22 flows into the indoor evaporator 23, and absorbs heat from the indoor blown air blown from the blower 32 to be evaporated. This cools the blown air.
  • the refrigerant flowing out of the indoor evaporator 23 flows into the accumulator 24 and is separated into gas and liquid. Then, the separated gas-phase refrigerant is sucked from the suction port 1 13 of the compressor 11 and compressed again in the order of the first compression mechanism and the second compression mechanism section.
  • the warm-up mode is set as the first warm-up mode and the second warm-up mode. ⁇ 2020/175 543 28 ⁇ (:171? 2020 /007719
  • the mode can be executed.
  • the first heating mode is started, for example, when the first heating mode is selected by the mode selection switch.
  • the control device 40 sets the high-stage expansion valve 13 to the throttled state, the low-stage expansion valve 22 to the fully closed state, and the passage opening/closing valve 27 to the open state. Further, the control device 40 sets the solenoid 182 of the integrated valve 14 to the energized state and the microvalve X 1 described later to the non-energized state.
  • control device 40 outputs the output of the control device 40 based on the detection signal of the air conditioning control sensor group 41 and the operation signal of the air conditioning operation switch group 42 described above. Controls various air conditioning control devices connected to the side.
  • control device 40 controls the air mix door 34 so that the bypass passage 35 is closed. As a result, the total flow rate of the blown air after passing through the indoor evaporator 23 passes through the indoor condenser 12.
  • the high pressure cooling medium discharged from the discharge port 110 of the compressor 11 flows into the indoor condenser 12 and exchanges heat with the blown air to radiate heat. As a result, the blown air is heated.
  • the refrigerant flowing out from the indoor condenser 12 is the high-stage expansion valve in the throttled state.
  • the separated gas-phase refrigerant is sucked from the suction port 1 13 of the compressor 11 1.
  • the heat of the refrigerant discharged from the compressor 11 in the indoor condenser 12 is dissipated to the blast air, and the heated indoor blast air is discharged into the vehicle interior. Can be blown out to. As a result, heating of the passenger compartment can be realized.
  • the second heating mode is started, for example, when the second heating mode is selected by the mode selection switch.
  • the control device 40 sets the high-stage side expansion valve 13 to the throttled state, the low-stage side expansion valve 22 to the fully closed state, and the passage opening/closing valve 27 to the open state. Further, the control device 40 sets the solenoid 182 of the integrated valve 14 to the non-energized state and the micro valve X 1 described later to the energized state.
  • the liquid side valve body 1 8 1 closes the liquid cooling medium passage 1 4 1, and the opening/closing member 16 opens the gas refrigerant passage 1 4 2 sill. It will be open.
  • the heat pump cycle 10 is switched to the refrigerant circuit in which the refrigerant flows as indicated by the solid arrow in FIG. That is, in the second heating mode, the so-called gas injection cycle is performed in which the gas-phase refrigerant separated in the gas-liquid separation space 1 41 flows into the intermediate pressure port 11 1 of the compressor 11 1.
  • control device 40 outputs the output of the control device 40 based on the detection signal of the above-mentioned air conditioning control sensor group 41 and the operation signal of the air conditioning operation switch group 42. Controls various air conditioning control devices connected to the side. Note that the control device 40 basically controls various air conditioning control devices in the same manner as in the first heating mode.
  • the high-pressure refrigerant discharged from the discharge port 110 of the compressor 11 flows into the indoor condenser 12.
  • the refrigerant that has flowed into the indoor condenser 12 exchanges heat with the air that has been blown from the blower 32 and passed through the indoor evaporator 23 to radiate heat. As a result, the blown air is heated.
  • the refrigerant flowing out from the indoor condenser 12 is a high-stage expansion valve that is in a throttled state.
  • the intermediate-pressure refrigerant decompressed in 1 flows into the gas-liquid separation space 1 4 1 13 from the refrigerant inlet 1 4 1 3 of the integrated valve 14 and is separated into gas and liquid.
  • the liquid-phase refrigerant separated in the gas-liquid separation space 1 41 flows into the liquid refrigerant passage 1 4 1.
  • the liquid-phase refrigerant that has flowed into the liquid refrigerant passage 1 41 is decompressed and expanded in the decompression unit 17 to low-pressure refrigerant because the liquid-side valve body 1 8 1 closes the liquid refrigerant passage 1 4 1.
  • Flow out from the liquid outlet 1 4 1 6 .
  • the refrigerant pressure at the liquid outlet 1 4 1 6 side after being decompressed by the decompression unit 17 is guided to the pressure chamber 1 4 2 via the pressure introduction passage 19 so that the opening/closing member 1 6 Opens the gas refrigerant passage 1 42.
  • the gas-phase refrigerant separated in the gas-liquid separation space 1 4 1 13 flows out from the gas outlet 1 4 2 3 of the integrated valve 1 4 to the intermediate pressure port 1 1 13 side of the compressor 1 1. Inflow.
  • the intermediate-pressure vapor-phase refrigerant that has flowed into the intermediate-pressure port 11 is merged with the refrigerant that has been compressed in the first compression mechanism section, and is sucked into the second compression mechanism section.
  • the refrigerant flowing out from the liquid outlets 144 1 6 of the integrated valve 14 flows into the outdoor heat exchanger 20 and exchanges heat with the outside air blown from the blower fan 21 to absorb heat.
  • the heat of the refrigerant discharged from the compressor 11 in the indoor condenser 12 is dissipated to the blast air, and the heated indoor blast air is discharged into the vehicle interior. Can be blown out to. As a result, heating of the passenger compartment can be realized.
  • the second compression mechanism section can suck the mixed refrigerant having a low temperature, and the compression efficiency of the second compression mechanism section can be improved. Also, the first pressure ⁇ 2020/175543 31 ⁇ (: 171-1? 2020/007719
  • the decompression unit 17 is configured so that the throttle opening can be changed. Therefore, the heating capacity can be increased by adjusting the throttle opening of the decompression unit 17.
  • FIG. 7 is a Mollier diagram showing the state of the refrigerant in the second heating mode.
  • the state of the refrigerant in the second heating mode is, for example, the state shown by the solid line in the Mollier diagram of FIG. If the throttle opening of the decompression unit 17 is reduced from this state, the pressure on the upstream side of the decompression unit 17 will be a point? 1point? It rises to 2 and the state of the refrigerant changes to the state shown by the broken line in the Mollier diagram in Fig. 7.
  • control device 40 causes the integrated valve 1 4 to reduce the throttle opening by the control device 40 when the heating capacity is insufficient in the second heating mode. Control the decompression section 17 of. When the heating capacity is insufficient in the second heating mode, the control device 40 stops energizing the microvalve X 1 and reduces the throttle opening of the decompression unit 17.
  • the throttle opening of the pressure reducing unit 17 can be changed. Therefore, even when switching to the gas injection cycle, it is possible to improve the performance by adjusting the throttle opening degree of the pressure reducing section 17 to an opening degree suitable for the cycle load.
  • the decompression unit 17 changes the throttle opening with the micro valve X1. ⁇ 2020/175543 32 ⁇ (:171? 2020 /007719
  • the configuration it can be easily miniaturized compared to the case of using a solenoid valve or a motorized valve.
  • the microvalve X 1 is formed by the semiconductor chip as described above.
  • the use of a lever to amplify the amount of displacement due to thermal expansion also contributes to downsizing as compared to a solenoid valve that does not use such a lever.
  • the decompression unit 17 includes a fixed diaphragm 170 having a fixed opening.
  • the microvalve XI adjusts the throttle opening of the decompression unit 17 by switching the communication and blocking of the first refrigerant hole X 16 and the second refrigerant hole XI 7 by the movable part X 1 28. It is configured to do.
  • the decompression section 17 is configured to include not only the microvalve X1 but also the fixed throttle 1700, the first refrigerant hole X16 and the second refrigerant hole in the microvalve X1.
  • the throttle opening of the decompression unit 17 can be adjusted in stages by switching the communication and disconnection of XI 7.
  • the pressure reducing unit 17 includes the fixed throttle 170, the microvalve X 1 is not driven by not driving the microvalve X 1 when adjustment of the throttle opening of the pressure reducing unit 17 is unnecessary.
  • the frequency can be reduced and the energy consumption in the integrated valve 14 can be suppressed.
  • both the micro valve X1 and the valve module X0 have the II-turn structure refrigerant passage, it is possible to reduce digging of the lower body 141. In other words, it is possible to suppress the depth of the recess formed in the lower body 1 41 for disposing the valve module. The reason is as follows.
  • valve module ⁇ has a refrigerant flow path of II turn structure. ⁇ 2020/175 543 33 ⁇ (:171? 2020 /007719
  • the refrigerant inlet is on the surface of the lower body 1 41 side of the valve module ⁇ and the refrigerant outlet is on the opposite surface of the valve module X 0.
  • the refrigerant flow paths on both sides of the valve module ⁇ are to be accommodated in the lower body 1 41, the recesses that must be formed in the lower body 1 4 1 for disposing the valve module ⁇ become deep.
  • the micro valve X 1 itself is small, it is possible to further reduce the digging of the lower body 1 41 1.
  • the decompression unit 17 is also lightweight. Since the power consumption of the microvalve X 1 is small, the pressure reducing unit 17 can save power.
  • the present embodiment is different from the first embodiment in that the fixed aperture 1700 is not formed for the lower body 1441.
  • parts different from the first embodiment will be mainly described, and description of the same parts as in the first embodiment may be omitted.
  • the decompression unit 17 of the present embodiment is constituted by the valve module X 0 including the micro valve X I.
  • the micro valve X1 of the decompression unit 17 has an electric wiring 6, when energized.
  • the microvalve XI adjusts the electric power supplied to the microvalve X1 so that the movable part X1 28 is located at any intermediate position between the non-energized position and the maximum energized position. But you can stop it.
  • the electric power supplied to the microvalve X1 is It only needs to be half the maximum value within the control range.
  • the duty ratio should be 50%.
  • both the first refrigerant hole X16 and the second refrigerant hole XI7 are in communication with the through hole X120.
  • the second refrigerant hole X I 7 is not in a fully open state with respect to the through hole 120, but has an opening degree of less than 100% and greater than 0%. The closer the movable part X 1 28 is to the position at the maximum conducting potential at the intermediate position, the larger the opening of the second refrigerant hole X 17 with respect to the through hole X 1 20.
  • the micro valve X1 of the integrated valve 14 adjusts the opening degree of the second refrigerant hole XI7 by the movable section XI28 to increase the throttle opening degree of the pressure reducing section 17.
  • the structure is adjustable in steps or continuously. That is, the micro valve X I is configured as a variable throttle capable of changing the throttle opening of the pressure reducing unit 17.
  • the microvalve XI increases the throttle opening of the pressure reducing unit 17 when the duty ratio of the ⁇ /1 ⁇ /1 control by the control device 40 increases. If the duty ratio of ⁇ /! ⁇ /1 control becomes smaller, the throttle opening of the pressure reducing unit 17 will be reduced. ⁇ 2020/175 543 35 (:171? 2020/007719
  • control device 40 controls decompression unit 17 of integrated valve 14 so that the throttle opening becomes small. That is, when the heating capacity is insufficient in the second heating mode, control device 40 reduces the throttle opening of decompression unit 17 by reducing the duty ratio of ⁇ /1 ⁇ /1 control.
  • the pressure reducing unit 17 of the present embodiment can adjust the throttle opening of the pressure reducing unit 17 by adjusting the electric power supplied to the micro valve X 1.
  • the micro valve X 1 is configured as a variable throttle that can change the throttle opening of the pressure reducing unit 17
  • the throttle of the pressure reducing unit 17 can be changed by changing the opening of the fluid hole in the micro valve X 1.
  • the opening can be adjusted to a desired opening.
  • the throttle opening of the pressure reducing unit 17 can be adjusted to an opening suitable for the cycle load.
  • the operational effects obtained by the decompression unit 17 including the microvalve X 1 can be obtained as in the first embodiment.
  • the fixed body 170 is not formed on the lower body 1 41, but the invention is not limited to this.
  • the decompression unit 17 of the second embodiment may be configured to include the fixed aperture 1770.
  • the present embodiment is different from the first embodiment in that the opening/closing of the liquid refrigerant passage 1 4 1 by the liquid side valve body 1 8 1 is changed by utilizing the pressure difference of the refrigerant. ..
  • parts different from the first embodiment will be mainly described, and description of the same parts as the first embodiment may be omitted.
  • the integrated valve 14 is configured such that the liquid side valve body 1 8 1 is driven by the differential pressure type drive member 28.
  • the differential pressure type drive member 28 is a drive member that drives the liquid side valve body 1 8 1.
  • Is composed of a piston 2 81, an elastic member 2 82, a valve module 0 including a micro valve 1 and the like.
  • the differential pressure type drive member 28 is actuated by the microvalve 1 so that the liquid side valve body 1 8
  • It is composed of a pilot-type valve mechanism that displaces the liquid-side valve body 1 81 by changing the pressure acting on 1.
  • the piston 2 8 1 is attached to the shaft 1 so that it is displaced together with the liquid side valve body 1 8 1.
  • the piston 2 81 is slidably accommodated in a cylinder chamber 2 8 0 formed in the lower body 1 4 1.
  • the piston 2 81 constitutes a pressure receiving portion that receives the pressure of the refrigerant in the liquid side valve body 1 8 1.
  • the cylinder chamber 2800 is formed inside a portion of the lower body 141 facing the valve seat portion 1414. Specifically, the cylinder chamber 280 is divided and formed by a bottomed hole 1 4 1 9 formed in the lower body 1 4 1 and a lid portion 1 4 1 closing the bottomed hole 1 4 1 9. There is. The cylinder chamber 280 is divided by the piston 281 into an intermediate pressure chamber 2803 and a pressure control chamber 28013.
  • the intermediate pressure chamber 280 3 is a space formed between the bottom of the bottomed hole 1 419 and one surface of the piston 281 facing the bottom.
  • the intermediate pressure chamber 280 3 is a space into which the refrigerant flowing through the refrigerant inlet 1 4 13 is introduced.
  • the intermediate pressure chamber 280 3 communicates with the refrigerant inlet port 1 413 through the refrigerant introduction path 280 0 formed in the lower body 1 4 1.
  • the pressure control chamber 2800 has a lid 1 41 and a piston facing the lid 1 4 1.
  • the pressure control chamber 280 is a space into which a refrigerant for pressing the liquid side valve body 181 toward the valve opening side or the valve closing side is introduced.
  • An elastic member 2 82 for urging the piston 2 8 1 toward the bottomed hole 1 4 1 9 is arranged in the pressure control chamber 2 8 0.
  • the elastic member 2 82 is composed of a coil panel or the like.
  • the liquid side valve body 1 81 of the present embodiment is displaced in association with the piston 2 8 1.
  • the piston 2 8 1 receives the pressure acting on the piston 2 8 1 from the elastic member 2 8 2. ⁇ 2020/175 543 37 ⁇ (:171? 2020 /007719
  • the piston 2 81 is subjected to an intermediate pressure, which is the refrigerant pressure of the refrigerant inlet 1 4 1 3 on one side, and a control pressure that is the refrigerant pressure of the pressure control chamber 2 8 0 on the other side. ⁇ works.
  • the differential pressure type drive member 28 when the control pressure ⁇ is the same as the low pressure I, the pressure difference between the intermediate pressure and the control pressure ⁇ becomes the maximum. At this time, the load due to the pressure difference between the intermediate pressure and the control pressure ⁇ exceeds the urging force of the elastic member 2 82, and the piston 2 8 1 is displaced so as to approach the lid 1 41. That is, as shown in FIG. 19, the liquid side valve body 1 8 1 is separated from the valve seat portion 1 4 1 and the liquid refrigerant passage 1 4 1 is opened.
  • the integrated valve 14 opens the liquid refrigerant passage 1 4 1 when the control pressure ⁇ becomes a pressure equal to the low pressure pressure ⁇ , and the control pressure is The liquid refrigerant passage 1 41 is closed when the force ⁇ is about the same as the intermediate pressure.
  • the integrated valve 14 of the present embodiment has a configuration in which the control pressure ⁇ is adjusted by the micro valve 1 of the valve module 0. The details of the valve module 0 will be described below.
  • the valve module ⁇ includes a micro valve 1 which regulates the pressure acting on the piston 281.
  • the valve module ⁇ is integrally attached to the lower body 1 41.
  • the lower body 1 4 1 constitutes an attached object to which the micro valve 1 is attached.
  • the lower body 1 41 has a valve module described later. ⁇ 2020/175 543 38 ⁇ (:171? 2020 /007719
  • the first protrusion 2 1 of the rule 0, the second protrusion 2 2 and the third protrusion 2 3 are fitted into the first recess 1 4 1 ⁇ , the second recess 1 4 1 ⁇ , 3 Recesses 1 4 1 1 ⁇ is formed. 1st recess 1 4 1 ⁇ , 2nd recess 1 4 1 ⁇ , 3rd recess 1 4 1 When viewing the side surface of the mouth warbody 1 41, the second concave portion 1 4 1 ”, the first concave portion 1 4 1 and the third concave portion 1 4 1 are arranged so as to be linearly arranged in this order.
  • the first recess 1 41 is the first communicating passage 1 4 1 formed in the lower body 1 4 1.
  • the second recessed portion 1 4 1" communicates with the refrigerant inlet port 1 4 1 3 via a second communication passage 1 4 1 formed in the lower body 1 4 1.
  • the third recess 1 41 1 communicates with the pressure introducing passage 19 through the third communicating passage 1 4 1 n formed in the lower body 1 4 1.
  • the valve module ⁇ consists of a micro valve 1, a valve casing 2, a sealing member 3, three ⁇ rings 4, 4, 5 3 and 5 2 electrical wiring 6, 6 and 7 conversions. It has a plate 8
  • the micro valve 1 is a plate-shaped valve component, and is mainly composed of a semiconductor chip.
  • the microvalve 1 may or may not have components other than the semiconductor chip. Therefore, the microvalve 1 can be constructed in a small size.
  • the microvalve 1 is also a pressure adjusting component for adjusting the pressure of the refrigerant in the pressure control chamber 280.
  • the length in the thickness direction of the micro valve 1 is, for example, 2 And the length in the longitudinal direction orthogonal to the thickness direction is, for example, 1 And the length in the lateral direction orthogonal to both the longitudinal direction and the thickness direction is, for example, 5
  • the flow configuration of the microvalve 1 changes as the power supplied to the microvalve 1 changes.
  • the micro valve 1 functions as a pilot valve that drives the liquid side valve body 18 1.
  • the electrical wiring 6 and 7 extend from the surface opposite to the valve casing 2 out of the two plate surfaces of the micro valve 1 and are inside the sealing member 3 and the valve casing 2. Through, and is connected to the power supply external to the valve module 0. As a result, electric power is supplied from the power supply to the microvalve 1 through the electric wiring 6 and 7. ⁇ 2020/175 543 39 ⁇ (:171? 2020 /007719
  • the conversion plate 8 is a plate-shaped member arranged between the micro valve 1 and the valve casing 2.
  • the conversion plate 8 is a glass substrate.
  • One of the two plate surfaces of the conversion plate 8 is fixed to the microvalve 1 with an adhesive, and the other side is fixed to the valve casing 2 with an adhesive.
  • the conversion plate 8 is provided with flow passages 8 1, 8 2 and 8 3 for connecting the three refrigerant holes of the micro valve 1 described later and the three communication holes of the valve casing 2 to each other.
  • the flow passages 81, 82, and 83 are members for absorbing the difference between the pitch of the three refrigerant holes arranged in a line and the pitch of the three communication holes arranged in a line.
  • the flow channels 8 1, 8 2 and 8 3 pass from one of the two plate surfaces of the conversion plate 8 to the other.
  • the valve casing 2 is a resin casing that houses the microvalve 1 and the conversion plate 8.
  • the valve casing 2 is formed by resin molding with polyphenylene sulfide as a main component.
  • the valve casing 2 has a coefficient of linear expansion that is between the coefficient of linear expansion of the microvalve 1 and the coefficient of linear expansion of the lower body 1 41.
  • the valve casing 2 constitutes a component mounting portion for mounting the micro valve 1 to the lower body 1 41.
  • the valve casing 2 is a box body having a bottom wall on one side and an open side on the other side.
  • the bottom wall of the valve casing 2 is interposed between the lower body 1 41 and the microvalve 1 so that the microvalve 1 and the conversion plate 8 do not directly contact the lower body 1 4 1. Then, one surface of the bottom wall is in contact with and fixed to the lower body 1 41 1, and the other surface is in contact with and fixed to the conversion plate 8 1.
  • the difference between the linear expansion coefficients of the micro valve 1 and the lower body 1 41 can be absorbed by the valve casing 2.
  • the coefficient of linear expansion of the valve casing 2 is between the coefficient of linear expansion of the microvalve 1 and the coefficient of linear expansion of the lower body 1 41.
  • the coefficient of linear expansion of the conversion plate 8 is between the coefficient of linear expansion of the microvalve 1 and the coefficient of linear expansion of the valve casing 2.
  • the upper part 2 constitutes a part mounting part for mounting the microvalve part 1 to the lower body 1 41.
  • the bottom wall of the valve casing 2 projects from the plate-shaped base portion 20 facing the microvalve 1 and the base portion 20 in a direction away from the microvalve 1. It has a pillar-shaped first projecting portion 21 1, a second projecting portion 22 2, and a third projecting portion 23.
  • the first protruding portion 2 1, the second protruding portion 2 2 and the third protruding portion 2 3 are the first recessed portion 1 4 1 and the second recessed portion 1 4 formed in the lower body 1 1 4. 1", fitted into the third recess 1 41 1.
  • the first protruding portion 21 is formed with a first communication hole 1 that penetrates from the end on the side of the microvalve 1 to the end on the opposite side.
  • a second communicating hole (2) is formed in the second protruding portion (22) and penetrates from the end on the side of the microvalve (1) to the end on the opposite side.
  • the third protruding portion 23 is formed with a third communication hole 3 which penetrates from the micro valve V 1 side end to the opposite side end.
  • the first communication hole 1, the second communication hole 2, and the third communication hole 3 are arranged in a line, and the first communication hole 1 is located between the second communication hole 2 and the third communication hole 3. To position.
  • the end of the first communication hole V1 on the side of the micro valve 1 is connected to the end of the flow channel 8 1 formed on the conversion plate 8 on the side of the valve casing 2 on the side thereof.
  • the end of the second communication hole (2) on the side of the micro valve (1) communicates with the end of the flow channel (82) formed on the conversion plate (8) on the side of the valve casing (2).
  • the end of the third communication hole V 3 on the side of the micro valve 1 is communicated with the end of the flow passage 8 3 formed on the conversion plate 8 on the side of the valve casing 2.
  • the sealing member 3 is a member made of epoxy resin that seals the other open side of the valve casing 2.
  • the sealing member 3 covers the entire plate surface on the opposite side of the conversion plate 8 side from the two plate surfaces on the front and back of the microvalve 1. Further, the sealing member 3 covers a part of the two plate surfaces of the conversion plate 8 on the side opposite to the bottom wall side of the valve casing 2.
  • the sealing member (3) covers the electric wiring (6) and (7) so that the electric wiring (6) and (7) are protected from water and insulation. ⁇ 2020/175 543 41 ⁇ (: 171-1? 2020 /007719
  • the sealing member 3 is formed by resin potting or the like.
  • the ring 4 is attached to the outer periphery of the first protrusion 21 and is attached to the lower body.
  • the ring 5 3 is attached to the outer circumference of the second protruding part 22 2 and seals between the lower body 1 4 1 and the second protruding part 2 2 so that it is external to the integrated valve 14 and the refrigerant circuit. Suppress the leakage of refrigerant to the outside.
  • the ring 5 is attached to the outer circumference of the third protruding part 23, and seals between the lower body 1 41 and the third protruding part 2 3 so that the outside of the integrated valve 1 4 In addition, leakage of the refrigerant to the outside of the refrigerant circuit is suppressed.
  • the micro-valve 1 is an IV with a first outer layer 11 which is a semiconductor, an intermediate layer 1 2 and a second outer layer 13 which are both semiconductors. !3.
  • the first outer layer 1 1, the middle layer 1 2 and the second outer layer 1 3 are rectangular plate-shaped members having the same outer shape, and the first outer layer 1 1 and the intermediate layer 1 2 ,
  • the second outer layer 13 is laminated in this order.
  • the first outer layer 11 and the second outer layer 13 the second outer layer 13 is arranged on the side closest to the bottom wall of the valve casing 2.
  • the structures of the first outer layer 11 and the intermediate layer 12 and the second outer layer 13 which will be described later are formed by a semiconductor manufacturing process such as chemical etching.
  • the first outer layer 11 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 22, the first outer layer 11 has two through holes 1 4 and 1 5 penetrating the front and back. The ends of the electric valves 6 and 7 on the side of the micro valve 1 are inserted into the through holes 14 and 15 respectively.
  • the second outer layer 13 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIGS. 22, 22, and 25, the second outer layer 13 has a first refrigerant hole 16 that penetrates the front and back, a second refrigerant hole 17 and a third refrigerant hole 3 18 are formed.
  • the hydraulic diameter of each of the first refrigerant hole 16 and the second refrigerant hole 17 and the third refrigerant hole 18 is, for example, 0. But not limited to ⁇ 2020/175 543 42 ⁇ (: 171? 2020 /007719
  • the first refrigerant hole 16 and the second refrigerant hole 17 and the third refrigerant hole 18 correspond to the first fluid hole, the second fluid hole and the third fluid hole, respectively.
  • the first coolant hole 16 and the second coolant hole 17 and the third coolant hole 18 are respectively the flow passage 81 and the coolant of the conversion plate 8. It communicates with 8 2 and 8 3.
  • the first refrigerant hole 16 and the second refrigerant hole 17 and the third refrigerant hole 18 are arranged in a line.
  • the first refrigerant hole (16) is arranged between the second refrigerant hole (17) and the third refrigerant hole (18).
  • the intermediate layer 12 is a conductive semiconductor member, and is sandwiched between the first outer layer 11 and the second outer layer 13.
  • the intermediate layer 12 contacts the oxide film of the first outer layer 11 and the oxide film of the second outer layer 13 so that both the first outer layer 1 1 and the second outer layer 13 are electrically charged. It is non-conductive.
  • the middle layer 12 includes the first fixed part 1 2 1, the second fixed part 1 2 2 and the multiple first ribs 1 2 3 and the multiple second ribs. It has a boot 1 2 4, a spine 1 2 5, an arm 1 2 6, a beam 1 2 7 and a movable part 1 2 8.
  • the first fixing portion 1 21 is a member fixed to the first outer layer 1 1 and the second outer layer 1 3.
  • the 1st fixed part 1 2 1 is the 2nd fixed part 1 2 2, the 1st rib 1 2 3, the 2nd rib 1 2 4, the spine 1 2 5, the arm 1 2 6 and the beam 1 2 7 and the movable part 1 2 8 are formed so as to surround the same one fluid chamber 1 9.
  • the fluid chamber (19) is a chamber surrounded by the first fixed part (1) 21, the first outer layer (1 1) and the second outer layer (1 3 ).
  • the fluid chamber 19 is a pressure regulating fluid chamber in which the refrigerant introduced into the pressure control chamber 280 13 flows.
  • the first fixing portion 1 21 1, the first outer layer 11 and the second outer layer 13 correspond to the base and the pressure adjusting base as a whole.
  • the electric wirings 6 and 7 are electric wirings for changing and displacing the temperatures of the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4.
  • the fixing of the first fixing portion 1 2 1 to the first outer layer 1 1 and the second outer layer 1 3 is performed by the refrigerant from the fluid chamber 1 9 to the first refrigerant hole 1 6 and the second refrigerant hole 1 3 It is carried out in a form that suppresses leakage from the microvalve 1 through the parts other than 17 and the third cooling medium hole 18. ⁇ 2020/175 543 43 ⁇ (:171? 2020 /007719
  • the second fixing portion 1 22 is fixed to the first outer layer 1 1 and the second outer layer 1 3.
  • the second fixed portion 112 is surrounded by the first fixed portion 1 21 and is arranged apart from the first fixed portion 1 21.
  • arm 1 26, beam 1 27, movable part 1 28 are not fixed to the 1st outer layer 1 1 and the 2nd outer layer 1 3, but the 1st outer layer 1 1 and 2 It is displaceable with respect to the outer layer 1 3.
  • the spine 125 has an elongated rod shape that extends in the lateral direction of the rectangular shape of the intermediate layer 12. One end in the longitudinal direction of the spine 1 25 is connected to the beam 1 27.
  • the plurality of first ribs 125 are arranged on one side of the spine 125 in a direction orthogonal to the longitudinal direction of the spine 125.
  • the plurality of first ribs 125 are arranged in the longitudinal direction of the spine 125.
  • Each of the first ribs 1 23 has an elongated rod shape and can expand and contract depending on the temperature.
  • Each of the first ribs 1 23 is connected to the first fixed portion 1 2 1 at one end in the longitudinal direction and is connected to the spine 1 25 at the other end.
  • the first ribs 1 23 are offset toward the beam 1 27 side in the longitudinal direction of the spine 1 25 as the 1st fixed part 1 2 1 side approaches the spine 1 25 side. As you can see, it is skewed to the spine 1 25.
  • the plurality of first ribs 123 extend parallel to each other.
  • the plurality of second ribs 124 are arranged on the other side of the spine 125 in the direction orthogonal to the longitudinal direction of the spine 125.
  • the plurality of second ribs 124 are arranged in the longitudinal direction of the spine 125.
  • Each of the second ribs 1 24 has an elongated rod shape and can expand and contract depending on the temperature.
  • Each of the second ribs 124 is connected to the second fixed portion 122 at one end in the longitudinal direction and is connected to the spine 125 at the other end.
  • the arm 1 2 6 has an elongated rod shape that extends non-orthogonally and parallel to the spine 1 2 5. One end in the longitudinal direction of the arm 1 2 6 is connected to the beam 1 2 7 and the other end is connected to the first fixed portion 1 2 1.
  • the beam 1 27 has an elongated rod shape extending in a direction intersecting with the spine 1 2 5 and the arm 1 2 6 at about 90°.
  • One end of the beam 1 2 7 is connected to the movable portion 1 2 8.
  • the arm 1 2 6 and the beam 1 2 7 as a whole correspond to the amplification section and the pressure adjustment amplification section.
  • connection position 2 of the 1 2 7 and the connection position 3 of the beam 1 2 7 and the movable part 1 2 8 are arranged in this order along the longitudinal direction of the beam 1 2 7.
  • connection point between the first fixed part 1 2 1 and the arm 1 2 6 is defined as the hinge 0, from the hinge 0 to the connection position 2 in the plane parallel to the plate surface of the intermediate layer 1 2
  • the straight line distance from the hinge 0 to the connection position 3 is longer than the straight line distance of.
  • the value obtained by dividing the former linear distance by the latter linear distance may be 1/5 or less, or 1/10 or less.
  • the hinge ⁇ is also a pressure adjusting hinge.
  • Connection position 3 is also the pressure adjustment connection position.
  • the movable part 1 28 is a pressure adjusting movable part that adjusts the pressure of the refrigerant flowing through the fluid chamber 1 9.
  • the outer shape of the movable portion 1 28 has a rectangular shape extending in the direction of approximately 90 ° with respect to the longitudinal direction of the beam 1 27 7. This movable part 1 28 can move integrally with the beam 1 2 7 in the fluid chamber 1 9.
  • the movable portion 1 28 is in the shape of a frame that surrounds the through hole 1 20 that penetrates the front and back of the intermediate layer 1 2. Therefore, the through hole 1208 is also integrated with the moving part 1208. ⁇ 2020/175 543 45 ⁇ (:171? 2020 /007719
  • the through hole 112 is a part of the fluid chamber 19.
  • the movable portion 1 28 is opened by the second refrigerant hole 17 with respect to the through hole 1 20 and the through hole 1 8 of the third refrigerant hole 18 is set. Change the opening for 20.
  • the first refrigerant hole 16 is always fully open to the through hole 1 20.
  • the first application point 1 2 9 near the part connected to the plurality of 1st ribs 1 2 3 is shown in FIG.
  • the end of the electric wiring 6 that has passed through the through hole 1 4 of the first outer layer 11 is connected to the end of the micro valve 1 side.
  • the second applied point 1300 of the second fixed part 1 2 2 is connected to the electric wire 7 passing through the through hole 1 5 of the 1st outer layer 11 shown in Fig. 22.
  • the micro valve 1 side end is connected.
  • valve module 0 When the energization of the microvalve 1 is started, a voltage is applied between the electric wiring 6 and 7 to the first application point 1 29 and the second application point 1 30. Then, a current flows through the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4. Due to this current, the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4 generate heat. As a result, each of the plurality of first ribs 1 23 and the plurality of second ribs 1 2 4 expands in the longitudinal direction.
  • connection position? 2 corresponds to the biasing position and the pressure regulating biasing position.
  • the member consisting of the beam 1 27 and the arm 1 2 6 integrally changes its posture with the hinge 0 as a fulcrum and the connection position 2 as a force point.
  • the movable part 1 2 8 connected to the end of the beam 1 2 7 opposite to the arm 1 2 6 also has its spine 1 2 5 in the longitudinal direction. Move to push side ⁇ 2020/175 543 46 ⁇ (:171? 2020 /007719
  • the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4 attach the spine 1 2 5 on the side opposite to the connection position 2 1.
  • the biased spine 1 2 5 pulls the beam 1 2 7 at the connecting position 2.
  • the member consisting of the beam 1 2 7 and the arm 1 2 6 integrally changes its posture with the hinge 0 as a fulcrum and the connection position 2 as a force point.
  • the movable part 1 2 8 connected to the end of the beam 1 2 7 opposite to the arm 1 2 6 also has its spine 1 2 5 in the longitudinal direction. Move to the pulling side.
  • the movable portion 1 28 is stopped at a predetermined non-energized position.
  • the through hole 1 20 is in a direction orthogonal to the plate surface of the intermediate layer 1 2.
  • the first refrigerant hole 16 and the third refrigerant hole 18 overlap with each other, but do not overlap the second refrigerant hole 17 in that direction.
  • the second refrigerant hole 17 is movable in the direction perpendicular to the plate surface of the intermediate layer 1 2. ⁇ 2020/175 543 47 ⁇ (:171? 2020 /007719
  • the first refrigerant hole 16 and the third refrigerant hole 18 are fully opened and the second refrigerant hole 17 is fully closed with respect to the through hole 120. Therefore, in this case, the first refrigerant hole 16 is communicated with the third refrigerant hole 18 via the movable part 128, and the second refrigerant hole 17 is also connected to the first refrigerant hole 16. The third refrigerant hole 18 is also shut off. As a result, between the first communication hole V1 and the third communication hole V3, the flow path 81, the first refrigerant hole 16, the through hole 120, the third refrigerant hole 18 Refrigerant can be distributed through the flow path 83.
  • the through hole 1 20 has the first refrigerant hole 1 6 and the second refrigerant hole 1 6 in the direction orthogonal to the plate surface of the intermediate layer 1 2 Although it overlaps with 17, it does not overlap with the third refrigerant hole 18 in that direction.
  • the third refrigerant hole (18) overlaps the movable portion (128) in a direction orthogonal to the plate surface of the intermediate layer (12). That is, at this time, the first refrigerant hole 16 and the second refrigerant hole 17 are fully opened and the third refrigerant hole 18 is fully closed with respect to the through hole 120.
  • the first refrigerant hole 16 communicates with the second refrigerant hole 17 through the movable part 128, and the third refrigerant hole 18 is the first refrigerant hole 16 and the second refrigerant hole 16 is the second refrigerant hole.
  • the hole 17 is also blocked.
  • the flow path 81, the first refrigerant hole 16, the through hole 1 20, the second refrigerant hole 17 and the flow path Refrigerant can flow through the air 83.
  • the microvalve 1 includes the beam 1 27 and the arm 1 26 as a lever with the hinge ⁇ as the fulcrum, the connection position 2 as the force point, and the connection position 3 as the action point. Function. As described above, parallel to the plate surface of the intermediate layer 1 2 ⁇ 2020/175 543 48 ⁇ (:171? 2020 /007719
  • the straight line distance from the hinge 0 to the connecting position 3 is longer than the straight line distance from the hinge 0 to the connecting position 2 in the plane. Therefore, the movement amount of the connection position 3 which is the action point is larger than the movement amount of the connection position 2 which is the power point. Therefore, the amount of displacement due to thermal expansion is amplified by the lever and transmitted to the movable portion 1 28.
  • the flow path of the refrigerant in the microvalve 1 has the II vane structure. Specifically, the refrigerant flows into the micro valve 1 from one surface of the micro valve 1, passes through the micro valve 1, and then flows from the same surface of the micro valve 1 to the micro valve 1. It leaks out.
  • the refrigerant passage in the valve module 0 also has a II-turn structure. Specifically, the refrigerant flows into the valve module 0 from one surface of the valve module 0, passes through the valve module 0, and flows from the same surface of the valve module 0 to the valve module 0. It leaks out.
  • the direction orthogonal to the plate surface of the intermediate layer 12 is the stacking direction of the first outer layer 11, the intermediate layer 12 and the second outer layer 13.
  • the first recess 1 41 and the first communication passage 1 41 1 communicate with the pressure control chamber 280. Further, the second refrigerant hole 17 communicates with the refrigerant inlet port 1 4 1 3 via the second communication hole 2, the second recess 1 41 ′′, and the second communication passage 1 4 1. Then, the third refrigerant hole 18 is connected to the liquid outlet 1 4 1 via the third communication hole 3, the third recess 1 41 1 ⁇ , the third communication passage 1 4 1 n, and the pressure introduction passage 1 9. It communicates with 6.
  • the movable portion 1 28 of the micro valve 1 when the movable portion 1 28 of the micro valve 1 is in the non-energized position, the first refrigerant hole 16 and the third refrigerant hole 18 communicate with each other, and pressure control is performed.
  • the chamber 280 communicates with the liquid outlet 1 4 1 6 via the pressure introduction passage 19. More this, the pressure control chamber 2 8 0 spoon pressure (i.e., control pressure ⁇ ) is reduced to an equivalent low pressure ⁇ the liquid outlet 1 4 1 6.
  • the integrated valve 14 has a control pressure ⁇ when the micro valve 1 is de-energized. ⁇ 2020/175 543 49 ⁇ (:171? 2020 /007719
  • the drive member of the liquid side valve body 1 81 is a differential pressure type drive member.
  • the differential pressure type drive member 28 is configured to displace the liquid side valve body 1 81 to the valve opening side or the valve closing side by adjusting the pressure in the pressure control chamber 280 using the micro valve 1. Therefore, it can be made smaller than Solenoid 182.
  • the microvalve 1 is formed by the semiconductor chip as described above.
  • the amount of displacement due to thermal expansion is amplified by using the lever, and it is possible to make it smaller than the solenoid valve or motorized valve that does not use the lever. It
  • the microvalve 1 is configured such that the movable portion 1 28 selectively opens and closes the second refrigerant hole 17 and the third refrigerant hole 18 so that the pressure control chamber 28 0 It is configured to change the pressure in the slag. According to this, the liquid side valve body 1 81 can be displaced to the valve closing side and the valve opening side by adjusting the pressure in the pressure control chamber 280 by the microvalve 1.
  • the microvalve 1 uses a lever, and the amount of displacement due to thermal expansion can be suppressed more than the amount of movement of the movable part 1 28, so that the movable part 1 2 ⁇ 2020/175 543 50 ⁇ (:171? 2020 /007719
  • Power consumption for driving 8 can also be reduced. Further, since the impact sound when the solenoid valve is driven can be eliminated, the noise can be reduced. Further, the displacement of the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4 occurs due to heat, so that the noise reduction effect is high.
  • the flow path of the refrigerant in the microvalve 1 has a II vane structure. Specifically, the refrigerant flows into the micro valve 1 from one surface of the micro valve 1, passes through the micro valve 1, and then flows from the same surface of the micro valve 1 to the micro valve 1. It leaks out.
  • the refrigerant passage in the valve module 0 also has a II-turn structure. Specifically, the refrigerant flows into the valve module 0 from one surface of the valve module 0, passes through the valve module 0, and flows from the same surface of the valve module 0 to the valve module 0. It leaks out.
  • the direction orthogonal to the plate surface of the intermediate layer 12 is the stacking direction of the first outer layer 11, the intermediate layer 12 and the second outer layer 13.
  • the valve module ⁇ does not have a refrigerant flow path of the structure of II, the valve module 0 has a refrigerant inlet on the surface of the lower body 1 41 side, and the valve module 0 has a refrigerant inlet. It is assumed that there is a refrigerant outlet on the opposite surface. In that case, it is necessary to form a refrigerant flow path on both sides of the valve module 0. Therefore, when the refrigerant flow passages on both sides of the valve module 0 are to be accommodated in the lower body 1 41, the recesses that must be formed in the lower body 1 4 1 for disposing the valve module 0 become deep. Further, since the micro valve 1 itself is small, it is possible to further reduce the dug of the lower body 1 41. ⁇ 2020/175543 51 ⁇ (: 171-1?2020/007719
  • the electric wiring layers 6 and 7 are arranged on the surface opposite to the surface on which the first refrigerant hole 16 and the second refrigerant hole 17 are formed.
  • the electrical wiring 6 and 7 can be placed closer to the atmosphere. Therefore, a hermetic sealing structure for reducing the influence of the refrigerant atmosphere on the electric wiring 6 and 7 is not required. As a result, the integrated valve 14 can be downsized.
  • the integrated valve 14 is lightweight. Since the power consumption of the microvalve 1 is small, the integrated valve 14 saves power.
  • the depressurization unit 17 is configured to include the microvalve X 1, but the invention is not limited to this.
  • the pressure reducing section 17 may be composed of a fixed throttle 170.
  • FIGS. 29 to 31 a fourth embodiment will be described with reference to FIGS. 29 to 31.
  • This embodiment is different from the third embodiment in that the pressure reducing portion 17 is not provided for the integrated valve 14.
  • parts different from the third embodiment will be mainly described, and description of the same parts as the third embodiment may be omitted.
  • the integrated valve 14 is not provided with the pressure reducing section 17 at a position adjacent to the valve seat section 1 41 1.
  • the liquid side valve body 1 81 constitutes a valve body for adjusting the opening degree of the liquid refrigerant passage 1 4 1.
  • the liquid-side valve body 1 81 is configured so that the gap (3 is a throttle for decompressing the refrigerant in the valve-closed state.
  • the gap is a throttle for decompressing the refrigerant in the valve-closed state.
  • the clearance ⁇ 3 formed between 8 1 and the valve seat 1 41 1 is also called the opening of the liquid refrigerant passage 1 4 1.
  • the integrated valve 14 configured as described above is provided with a liquid refrigerant passage 1 ⁇ 2020/175 543 52 ⁇ (:171? 2020 /007719
  • the microvalve 1 of the present embodiment is connected to the microvalve 1 through the electric wiring 6 and 7 through the first application point 1 29 and the second application point 1 30 when energized.
  • the greater the power supplied the greater the amount of movement of the movable portion 128 with respect to the non-energized position. This is because the higher the power supplied to the microvalve 1, the higher the temperature of the first rib 1 23 and the second rib 1 24, and the greater the degree of expansion.
  • the voltage applied from the electrical wiring 6 and 7 to the first applied point 1 29 and the second applied point 1 30 is controlled by ⁇ /1 ⁇ /1, the larger the duty ratio, The amount of movement of the movable part 128 also increases when the power is off.
  • the movable part 128 is moved between the non-energized position and the maximum energized position. It can be stopped at any intermediate position. For example, in order to stop the movable part 128 at a position equidistant from the maximum energized position and the non-energized position (that is, the central position), the power supplied to the microvalve 1 must be within the control range. It should be half the maximum value. For example, the duty ratio of ⁇ /1 ⁇ /1 control should be 50%.
  • the first refrigerant hole 16 and the second refrigerant hole 17 and the third refrigerant hole 18 are all through holes 120. Is in communication with. However, the second refrigerant hole 17 and the third refrigerant hole 18 are not in the fully opened state with respect to the through hole 120, and the opening degree is less than 100% and greater than 0%. As the movable part 128 moves closer to the maximum potential at the intermediate position, the opening of the third refrigerant hole 18 with respect to the through hole 120 decreases and the opening of the second refrigerant hole 17 increases. To do.
  • the microvalve 1 of the present embodiment adjusts the control pressure ⁇ to the intermediate pressure by adjusting the opening of the second refrigerant hole 17 and the third refrigerant hole 18 by the movable part 128. It is configured to change between low pressure and low pressure. ⁇ 2020/175 543 53 ⁇ (:171? 2020 /007719
  • the microvalve 1 increases the control pressure ⁇ when the duty ratio of the ⁇ /1 ⁇ /1 control by the control device 40 increases and the control valve ⁇ is increased.
  • the control pressure ⁇ becomes smaller.
  • the control device 40 controls the electric power supplied to the microvalve 1 so that the control pressure ⁇ increases. That is, when the heating capacity is insufficient in the second heating mode, the control device 40 increases the control pressure ⁇ by increasing the duty ratio of ⁇ /1 ⁇ /1 control. According to this, the opening degree of the liquid refrigerant passage 1 41 1 can be brought close to the fully closed state.
  • microvalve 1 of the integrated valve 14 of the present embodiment adjusts the opening degree of at least one of the second refrigerant hole 17 and the third refrigerant hole 18 by the movable part 1 28. As a result, the pressure in the pressure control chamber 2813 is changed.
  • the microvalve X I of the first and second embodiments is modified to have a failure detection function.
  • the microvalve X I is provided with a failure detection unit X 50 as shown in FIGS. 32 and 33 in addition to the same configuration as the first and second embodiments.
  • the failure detection unit X50 includes a pledge circuit formed in the arm X1226 of the intermediate layer X12.
  • the bridge circuit contains four gauge resistors connected as shown in Figure 33.
  • the failure detection unit 50 is a bridge circuit whose resistance changes according to the distortion of the arm XI 26 corresponding to the diaphragm.
  • the failure detection unit X 50 is a semiconductor piezoresistive strain sensor.
  • the failure detection unit X50 is designed so that it does not conduct with the arm XI26 via the electrically insulating film. ⁇ 2020/175 543 54 ⁇ (:171? 2020 /007719
  • the wirings X51 and X52 are connected to the two diagonal input terminals of this bridge circuit. Then, a voltage for generating a constant current is applied to the input terminal from the wirings 51 and X52.
  • These wirings 5 1 and 5 2 are branched from the voltage (that is, the microvalve driving voltage) applied to the microvalve X 1 via the electrical wiring X 6 and 7 and extend to the above two input terminals. ing.
  • Wirings X 5 3 and X 5 4 are connected to the two output terminals on another diagonal of this bridge circuit. Then, a voltage signal of a level corresponding to the amount of distortion of the arm X I 2 6 is output from the wirings 5 3 and 5 4. As will be described later, this voltage signal is used as information for determining whether or not the micro valve X 1 is operating normally. The voltage signal output from the wiring 5 3 and X 5 4 is input to the external control device X 5 5 outside the micro valve X 1.
  • This external control device X55 may be, for example, the control device 40 of the vehicle air conditioner 1.
  • the external control device X 55 may be a meter (3 11) that displays the vehicle speed, the remaining fuel amount, the remaining battery amount, and the like in the vehicle.
  • the external controller X 5 5 wires the voltage signal according to the amount of distortion of the arm X 1 26.
  • the external control device 5 5 detects the presence or absence of a failure of the microvalve X 1 according to the voltage signal. Faults to be detected include, for example, a broken arm X 1 26, movement of a moving part X 1 28 and the first outer layer X 1 1 or the second outer layer X 1 3 with a minute foreign object sandwiched between them. Part X 1 2 8 is stuck, there is a malfunction, etc.
  • the external control device 55 uses this fact to detect whether or not there is a failure in the microvalve X I. That is, the external control device X 55 calculates the position of the movable part X 1 28 from the voltage signals from the wirings 5 3 and 5 4 based on the first map determined in advance. Then, based on the second map determined in advance, from the position of the movable part X1 28 to the electrical wiring X6, X7 necessary to realize the position under normal conditions to the microvalve X1. Calculate the power supply. These 1st map and 2nd map are recorded in the non-volatile memory of the external controller X 55. Non-volatile memory is a non-transitional tangible storage medium. The correspondence between the level of the voltage signal and the position in the first map may be determined in advance by an experiment or the like. Also, the correspondence relationship between the position on the second map and the supplied power may be determined in advance by experiments or the like.
  • the external control device X 55 compares the calculated electric power with the electric power actually supplied from the electric wirings 6, X 7 to the micro valve X 1. Then, if the absolute value of the difference between the former power and the latter power exceeds the allowable value, the external control device X 55 determines that the microvalve X 1 is out of order and does not exceed the allowable value. If not, the microvalve X 1 is determined to be normal. Then, when the external control device 55 determines that the microvalve X 1 is out of order, it performs a predetermined failure notification control.
  • the external control device X55 activates the notification device X56 that notifies the person in the vehicle.
  • the external controller X 55 may turn on the warning lamp.
  • the external control device X 55 may cause the image display device to display an image indicating that a failure has occurred in the microvalve X 1. This allows the vehicle occupant to be aware of the failure of microvalve X 1.
  • the external control device X 55 may record information indicating that a failure has occurred in the microvalve XI in the storage device in the vehicle.
  • This storage device is a non-transitional tangible storage medium. This allows the failure of the micro valve X 1 to be recorded. ⁇ 2020/175 543 56 ⁇ (:171? 2020 /007719
  • the external control device X 55 determines that the microvalve X 1 is out of order, the external control device X 55 performs energization stop control. In the de-energization control, the external controller X 5 5 de-energizes the micro valve X 1 from the electric wiring X 6, X 7. As described above, by stopping the power supply to the micro valve X 1 when the micro valve X 1 fails, the safety in the event of the micro valve X 1 failure can be improved.
  • the failure detection unit X50 outputs the voltage signal for determining whether or not the microvalve X1 is operating normally, so that the external control device X55 is It is possible to easily determine whether the microvalve X 1 has a failure.
  • this voltage signal is a signal corresponding to the amount of distortion of the arm X1 26. Therefore, it is possible to easily determine whether or not there is a failure in the microvalve X 1, based on the relationship between the amount of electricity supplied to the microvalve X 1 from the electrical wiring X 6 and X 7 and this voltage signal.
  • the microvalve X1 it is determined whether or not the microvalve X1 is out of order, based on the change in the resistance forming the bridge circuit.
  • a plurality of electrodes forming the capacitive component are formed on the arm X 1 26.
  • the external control device 55 can determine whether or not the microvalve X 1 has a failure based on the change in the electrostatic capacitance between the plurality of electrodes.
  • the microvalve 1 of the third and fourth embodiments is modified to have a failure detection function.
  • the microvalve 1 is provided with a failure detection unit 50 as shown in FIGS. 34 and 35, in addition to the same configurations as the third and fourth embodiments.
  • the failure detection unit 50 includes a pledge circuit formed in the arm 1 2 6 of the intermediate layer 1 2.
  • the bridge circuit consists of four gauge resistors connected as shown in Figure 35. ⁇ 2020/175 543 57 ⁇ (:171? 2020 /007719
  • the failure detection unit 50 is a bridge circuit whose resistance changes according to the strain of the arm 1 26, which corresponds to the diaphragm. That is, the failure detection unit 50 is a semiconductor piezoresistive strain sensor.
  • the failure detection unit 50 may be connected to the arm 1 26 through an electrically insulating film so as not to be electrically connected to the arm 1 26.
  • the wirings 5 1 and 5 2 are connected to the two input terminals on the diagonal of this bridge circuit. Then, a voltage for generating a constant current is applied from the wirings 51 and 52 to the input terminal.
  • the wirings 5 1 and 5 2 are branched from the voltage (that is, the microvalve driving voltage) applied to the microvalve 1 via the electrical wiring 6 and 7 and extend to the above two input terminals. ing.
  • the wiring 5 3 and the wiring 5 4 are connected to the two output terminals on another diagonal of the bridge circuit. Then, a voltage signal corresponding to the amount of distortion of the arm 1 2 6 is output from the wiring 5 3 and 5 4. As will be described later, this voltage signal is used as information for determining whether or not the micro valve 1 is operating normally.
  • the voltage signals output from the wirings 5 3 and 5 4 are input to the external control device 5 5 outside the micro valve 1.
  • the external control device 55 may be, for example, the control device 40 of the vehicle air conditioner 1.
  • the external control device 55 may be a meter (311) that displays the vehicle speed, the remaining fuel amount, the remaining battery amount, and the like in the vehicle.
  • the external control device 5 5 wires the voltage signal according to the distortion amount of the arm 1 2 6
  • the external control device 5 5 detects the presence or absence of a failure of the microvalve 1 according to the voltage signal. Failures to be detected include, for example, failures in which the arm 1 2 6 breaks, or a small foreign matter is caught between the movable part 1 2 8 and the first outer layer 1 1 or the second outer layer 1 3 Part 1 1 2 8 is stuck, there is a malfunction, etc.
  • the position of the movable part 1 28 can be estimated.
  • the microvalve 1 is normal, there is a correlation between the amount of electricity supplied to the microvalve 1 from the electric wiring 6 and 7 and the position of the movable part 1 28.
  • This energization amount is a control amount for controlling the microvalve 1.
  • the external control device 55 uses this fact to detect whether or not the microvalve 1 has a failure. That is, the external control device 55 calculates the position of the movable part 1 28 from the voltage signals from the wirings 5 3 and 5 4 based on the predetermined first map. Then, based on the second map determined in advance, from the position of the movable part 1 28 to the electrical wiring 6 and 7 required to realize the position under normal conditions to the microvalve 1 Calculate the power supply. These first map and second map are recorded in the non-volatile memory of the external control device 55. Non-volatile memory is a non-transitional tangible storage medium. The correspondence between the level of the voltage signal and the position in the first map may be determined in advance by an experiment or the like. Also, the correspondence relationship between the position on the second map and the supplied power may be determined in advance by experiments or the like.
  • the external control device 55 compares the calculated electric power with the electric power actually supplied from the electric wirings 6 and 7 to the microvalve 1. Then, if the absolute value of the difference between the former power and the latter power exceeds the allowable value, the external control device 55 determines that the microvalve 1 has failed and does not exceed the allowable value. If not, the microvalve 1 is determined to be normal. Then, when the external control device 55 determines that the microvalve 1 is out of order, it performs predetermined failure notification control.
  • the external control device 55 activates the notification device 5 6 that notifies the person in the vehicle. For example, the external control device 55 may turn on the warning lamp. Further, the external control device 55 may display an image indicating that the microvalve 1 has failed on the image display device. This allows the vehicle occupant to notice the failure of the microvalve 1. ⁇ 2020/175 543 59 ⁇ (:171? 2020 /007719
  • the external control device 55 may record information indicating that a failure has occurred in the microvalve 1 in a storage device in the vehicle.
  • This storage device is a non-transitional tangible storage medium. This allows the failure of the micro valve 1 to be recorded.
  • the external control device 55 determines that the microvalve 1 is out of order, the external control device 55 controls energization stop.
  • the external control device 5 5 stops energization from the electric wiring 6 and 7 to the micro valve 1. In this way, by stopping the power supply to the microvalve 1 when the microvalve 1 fails, it is possible to enhance the safety when the microvalve 1 fails.
  • the failure detection unit 50 outputs the voltage signal for determining whether the microvalve 1 is operating normally, so that the external control device 55 It is possible to easily determine whether or not there is a failure in the microvalve 1.
  • this voltage signal is a signal according to the amount of distortion of the arm 1 126. Therefore, it is possible to easily determine whether or not there is a failure in the microvalve 1 based on the relationship between the voltage applied to the microvalve 1 from the electric wiring 6 and 7 and the voltage signal.
  • the micro valve 1 it is determined whether or not the micro valve 1 is out of order on the basis of the change in the resistance forming the bridge circuit.
  • a plurality of electrodes forming a capacitive component are formed on the arm 1 26.
  • the external control device 55 can determine whether or not the microvalve 1 is out of order, based on the change in the electrostatic capacitance between the plurality of electrodes.
  • the decompression unit 17 may include, for example, a plurality of micro valves X I, and the throttle opening may be adjustable in a plurality of stages by switching the open/closed states of the plurality of micro valves X 1.
  • the above-described microvalve X1 of the first and second embodiments is not a normally-closed valve in which the throttle opening is minimum when not energized, but a normally-open valve in which the throttle opening is maximum when not energized. It may be configured.
  • the decompression unit 17 has a large opening 32 when the micro valve X I is not energized and a small opening 31 when energized.
  • the integrated valve 14 includes a micro valve X I and a lower body.
  • valve casing X 2 is desirable to interpose the valve casing X 2 with 1 41, but it is not limited to this.
  • the integrated valve 14 may be configured such that, for example, the micro valve X I and the lower body 1 41 are in contact with each other without the valve casing X 2. The same applies to the microvalve 1.
  • the plurality of first ribs X123 and the plurality of second ribs X1 are provided.
  • a plurality of first ribs 1 2 3 and a plurality of second ribs 1 2 4 generate heat when energized, and due to the heat generation, the temperature rises to expand.
  • these members may be composed of a shape memory material whose length changes as the temperature changes.
  • the integrated valve 14 can also be applied to the heat pump cycle 10 used for devices other than the vehicle air conditioner 1.
  • the shape and size of the micro valve X 1 are not limited to those shown in the above embodiment.
  • the micro valve XI is capable of controlling a very small flow rate, and has a first refrigerant hole X 16 and a second refrigerant hole XI 7 having hydraulic diameters that do not block the minute dust existing in the flow path. Good. This also applies to the microvalve 1.
  • the sensor when it is described that the external environment information of the vehicle (for example, the humidity outside the vehicle) is acquired from the sensor, the sensor is abolished and the external environment is acquired from the server or the cloud outside the vehicle. It is also possible to receive information. Alternatively, it is possible to eliminate the sensor, obtain related information related to the external environment information from a server or cloud outside the vehicle, and estimate the external environment information from the acquired related information.
  • the external environment information of the vehicle for example, the humidity outside the vehicle
  • the sensor is abolished and the external environment is acquired from the server or the cloud outside the vehicle. It is also possible to receive information. Alternatively, it is possible to eliminate the sensor, obtain related information related to the external environment information from a server or cloud outside the vehicle, and estimate the external environment information from the acquired related information.
  • control device and the method thereof according to the present disclosure are provided by configuring a processor and a memory programmed to execute one or more functions embodied by a computer program. It may be realized by a computer. Alternatively, the control device and the method thereof described in the present disclosure may be realized by a dedicated computer provided by configuring a processor with one or more dedicated hardware logic circuits. Alternatively, the control device and the method described in the present disclosure combine a processor and a memory programmed to execute one or a plurality of functions with a processor configured by one or more hardware logic circuits. May be implemented by one or more dedicated converters configured by. Also, a computer ⁇ 2020/175 543 62 ⁇ (: 171? 2020 /007719
  • the program may be stored in a computer-readable non-transition tangible recording medium as an instruction to be executed by the computer.
  • the integrated valve includes a body, a liquid side valve body, an opening/closing member, and a decompression unit, and the decompression unit is a reduction unit. It includes a valve component for adjusting the throttle opening of the pressure section.
  • the valve part has a base part where a fluid chamber in which the refrigerant flows is formed, a drive part that is displaced by a temperature change, an amplification part that amplifies the displacement of the drive part due to a temperature change, and a displacement amplified by the amplification part. And a movable part that adjusts the refrigerant pressure of the fluid chamber by being transmitted and moving.
  • the amplification section functions as a lever with the hinge as a fulcrum, the amplification section as a force point at the biasing position of the drive section, and the connection point between the amplification section and the movable section as an action point. Has been done.
  • the decompression unit includes a fixed throttle whose opening is fixed.
  • a first fluid hole serving as a refrigerant inlet in the fluid chamber and a second fluid hole serving as a refrigerant outlet in the fluid chamber are formed in the base portion.
  • the valve component is configured to adjust the throttle opening of the decompression unit by switching the communication and blocking of the first fluid hole and the second fluid hole by the movable part.
  • the decompression unit is configured to include not only the valve component but also the fixed throttle
  • the decompression unit of the decompression unit is switched by switching the communication and blocking of the first fluid hole and the second fluid hole in the valve component.
  • the opening can be adjusted stepwise.
  • the pressure reducing section includes a fixed throttle
  • the valve components are not driven when adjustment of the throttle opening of the pressure reducing section is unnecessary, thereby reducing the frequency of driving the valve components and reducing the energy consumption of the integrated valve. It is possible to reduce the consumption of gi.
  • a first fluid hole serving as a refrigerant inlet in the fluid chamber and a second fluid hole serving as a refrigerant outlet in the fluid chamber are formed in the base portion.
  • the valve part not only switches the communication and blockage of the first fluid hole and the second fluid hole by the movable part, but it also allows the movable part to connect at least one of the first fluid hole and the second fluid hole. Adjust the throttle opening of the decompression unit by adjusting the opening. ⁇ 2020/175 543 63 ⁇ (:171? 2020 /007719
  • the aperture of the pressure reducing unit can be set to a desired value by changing the opening of the fluid hole in the valve component. The opening can be adjusted.
  • the integrated valve includes a drive member that drives the liquid side valve body.
  • the body is provided with a pressure control chamber into which a refrigerant for pressing the liquid side valve element toward the valve opening side or the valve closing side is introduced.
  • the drive member includes a pressure adjusting component for adjusting the pressure of the refrigerant in the pressure control chamber.
  • the pressure regulating component includes a pressure regulating base in which a pressure regulating fluid chamber in which the refrigerant introduced into the pressure control chamber flows is formed, a pressure regulating drive that is displaced when its own temperature changes, and a temperature of the pressure regulating drive. And a pressure-adjusting amplification unit that amplifies the displacement caused by the change.
  • the pressure-regulating component has a pressure-adjusting movable part that adjusts the pressure of the refrigerant flowing through the pressure-adjusting fluid chamber by moving the displacement amplified by the pressure-adjusting amplifying part. Further, when the pressure adjusting drive unit is displaced, the pressure adjusting drive unit biases the pressure adjusting amplifying unit at the pressure adjusting biasing position, so that the pressure adjusting amplifying unit is displaced using the pressure adjusting hinge as a fulcrum, and The pressure adjusting amplifier urges the pressure adjusting movable part at the pressure adjusting connecting position of the pressure amplifying part and the movable part. The distance from the pressure adjustment hinge to the pressure adjustment connection position is longer than the distance from the pressure adjustment hinge to the pressure adjustment bias position.
  • the liquid side valve body can be displaced to the valve opening side or the valve closing side by the pressure adjustment of the pressure control chamber by the pressure adjusting component. Since this amplifying unit functions as a lever, this pressure regulating component can be made smaller than a solenoid valve or a motor-operated valve that does not use such a lever. This makes it possible to reduce the size of the integrated valve and improve mountability.
  • the integrated valve includes a body, a liquid side valve body, an opening/closing member, and a driving member.
  • a pressure control chamber into which a refrigerant for pressing the liquid side valve element toward the valve opening side or the valve closing side is introduced, is formed in the body.
  • the drive member includes a valve component for adjusting the pressure of the refrigerant in the pressure control chamber. The valve parts are displaced by the temperature change and the base where the fluid chamber where the refrigerant flows is formed. ⁇ 2020/175 543 64 ⁇ (:171? 2020 /007719
  • the amplification section is configured to function as a lever with the hinge serving as a fulcrum, the amplification section as a force point at the biasing position of the drive section, and the connection point between the amplification section and the movable section as an action point. ing.
  • the integrated valve reduces the pressure of the liquid-phase refrigerant flowing through the liquid refrigerant passage and causes it to flow to the liquid outlet when the liquid-side valve body is displaced to the position where the liquid refrigerant passage is closed. Equipped with a decompression unit.
  • the base has a first fluid hole that connects the fluid chamber and the pressure control chamber, a second fluid hole that connects the fluid chamber and the refrigerant inlet, and a third fluid hole that connects the fluid chamber and the liquid outlet.
  • the valve component is configured to change the pressure in the pressure control chamber by selectively opening and closing the second fluid hole and the third fluid hole by the movable part. According to this, the liquid side valve body can be displaced to the valve closing side and the valve opening side by the pressure adjustment of the pressure control chamber by the valve component.
  • the base has a first fluid hole for communicating the fluid chamber and the pressure control chamber, a second fluid hole for communicating the fluid chamber and the refrigerant inlet, and a fluid chamber and the liquid flow.
  • a third fluid hole communicating with the outlet is formed.
  • the valve part not only selectively opens and closes the second fluid hole and the third fluid hole by the movable part, but also moves the opening degree of at least _ of the second fluid hole and the third fluid hole by the movable part.
  • the pressure in the pressure control chamber is changed by adjustment.
  • the liquid-side valve body not only can the liquid-side valve body open and close the liquid-refrigerant passage, but also the liquid-side valve body can bring the liquid-refrigerant passage into a throttled state. In this case, it is not necessary to provide a decompression section separately for the integrated valve. This contributes to simplification and miniaturization of the integrated valve.
  • a component mounting portion for mounting the valve component to the mounting target object which is the mounting target of the valve component
  • the component mounting part includes the valve component and the mounting target object. It is interposed between the component mounting portion and the valve component so as not to come into direct contact with an object. According to this, when the component mounting portion is interposed between the object to be mounted and the valve component, the component mounting portion functions as a cushioning material to protect the valve component.
  • the component mounting portion is configured such that the linear expansion coefficient of the component mounting portion is a value between the linear expansion coefficient of the valve component and the linear expansion coefficient of the mounted object. Has been done. According to this, even if thermal strain occurs due to the temperature change of the object to be attached, the stress of thermal strain due to the temperature change of the object to be attached is absorbed by the component mounting part, so it is possible to protect the valve component. it can.
  • the valve component includes a failure detection unit that outputs a signal for determining whether the valve component is operating normally or is malfunctioning. By outputting such a signal from the valve component, it is possible to easily determine whether or not there is a failure in the valve component.
  • the signal output by the valve component is a signal corresponding to the amount of distortion of the amplification section.
  • the drive section generates heat when energized, and the failure detection section sends a signal to a device that stops energization to the valve part when the valve part fails. Is output. In this way, by stopping energization when a valve component fails, it is possible to enhance safety in the event of a failure.
  • the failure detection unit outputs a signal to a device that operates a notification device that notifies a person when a valve component has a failure. This allows a person to know the failure of the valve component.
  • the valve component is composed of a semiconductor chip. According to this, the valve component can be made compact.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

L'invention concerne une vanne intégrée (14) qui est appliquée à un cycle de pompe à chaleur (10) qui peut être commuté vers un cycle d'injection de gaz. Un composant de vanne de la vanne intégrée comprend : des portions de base (X11, X12, X13) dans lesquelles est formée une chambre à fluide (X19) à travers lequel s'écoule un fluide frigorigène; et des sections d'entraînement (X123, X124, X125) qui sont déplacées lorsque leur température change. Le composant de vanne comprend : des sections d'amplification (X126, X127) qui amplifient le déplacement résultant du changement de température des sections d'entraînement; et des sections mobiles (X128, Y128) qui ajustent la pression du fluide frigorigène dans la chambre à fluide en se déplaçant du fait de la transmission du déplacement amplifié par les sections d'amplification. Lorsque les sections d'entraînement sont déplacées en raison de changements de température, les sections d'amplification sont sollicitées à une position de sollicitation (XP2) par les sections d'entraînement, amenant les sections d'amplification à être déplacées avec une charnière (XP0) qui fait office de point de pivot, et amenant les sections d'amplification à solliciter les sections mobiles au niveau d'une position de connexion (XP3) des sections d'amplification et des sections mobiles. La distance entre la charnière et la position de connexion est supérieure à la distance entre la charnière et la position de sollicitation.
PCT/JP2020/007719 2019-02-28 2020-02-26 Vanne intégrée WO2020175543A1 (fr)

Applications Claiming Priority (2)

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JP2019035224A JP6973431B2 (ja) 2019-02-28 2019-02-28 統合弁
JP2019-035224 2019-02-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002005334A (ja) * 2000-06-20 2002-01-09 Nichigi Engineering Co Ltd ダイヤフラム弁装置における異常検知装置
JP2015017763A (ja) * 2013-07-11 2015-01-29 株式会社デンソー ヒートポンプ用統合弁
CN104344611A (zh) * 2013-08-08 2015-02-11 盾安环境技术有限公司 一种膨胀阀
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US20150354875A1 (en) * 2013-06-25 2015-12-10 Zhejiang Dunan Hetian Metal Co., Ltd. On-Demand Micro Expansion Valve for a Refrigeration System
JP2015017763A (ja) * 2013-07-11 2015-01-29 株式会社デンソー ヒートポンプ用統合弁
CN104344611A (zh) * 2013-08-08 2015-02-11 盾安环境技术有限公司 一种膨胀阀

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