WO2020175549A1 - Système de vanne - Google Patents

Système de vanne Download PDF

Info

Publication number
WO2020175549A1
WO2020175549A1 PCT/JP2020/007725 JP2020007725W WO2020175549A1 WO 2020175549 A1 WO2020175549 A1 WO 2020175549A1 JP 2020007725 W JP2020007725 W JP 2020007725W WO 2020175549 A1 WO2020175549 A1 WO 2020175549A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
refrigerant
hole
chamber
pressure
Prior art date
Application number
PCT/JP2020/007725
Other languages
English (en)
Japanese (ja)
Inventor
陽一郎 河本
押谷　洋
陽平 長野
紘志 前田
達博 鈴木
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
Priority to CN202080016800.6A priority Critical patent/CN113508088A/zh
Publication of WO2020175549A1 publication Critical patent/WO2020175549A1/fr

Links

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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
    • B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves

Definitions

  • the present disclosure relates to a valve device used in a refrigeration cycle.
  • Patent Document 1 describes a technique in which a valve element is moved by a valve component driven by solenoid.
  • Patent Document 1 Japanese Unexamined Patent Publication No. 20 0 6 _ 9 7 7 61
  • the present disclosure aims to make it easier to reduce the size of a valve device that is used in a refrigeration cycle and that uses a valve component different from the valve body to move a certain valve body, as compared with the related art. To do.
  • a valve device used in a refrigeration cycle includes a first port, a second port, and a valve chamber for circulating a refrigerant flowing from the first port to the second port.
  • a body formed with, and by displacing in the valve chamber, communication between the first port and the second port through the valve chamber, ⁇ 2020/175549 ⁇ (:171?2020/007725
  • valve part for changing the pressure of the refrigerant part wherein the valve part is formed with a refrigerant chamber through which a refrigerant flows, a first refrigerant hole communicating with the refrigerant chamber, and a second refrigerant hole communicating with the refrigerant chamber.
  • the base part, the driving part that is displaced when the temperature of the driving part changes, the amplifying part that amplifies the displacement due to the temperature change of the driving part, and the displacement amplified by the amplifying part is transmitted to move in the refrigerant chamber.
  • a movable part that adjusts the flow rate of the refrigerant between the first refrigerant hole and the second refrigerant hole through the refrigerant chamber, and when the drive part is displaced by a change in temperature,
  • the driving unit biases the amplifying unit at the biasing position, whereby the amplifying unit is displaced with a hinge as a fulcrum, and the amplifying unit moves the movable unit at the connection position between the amplifying unit and the movable unit.
  • the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position, and one of the first refrigerant hole and the second refrigerant hole is the external communication passage.
  • the amplification unit of the valve component configured as described above functions as a lever, the displacement amount corresponding to the temperature change of the drive unit is amplified by the lever and transmitted to the movable unit.
  • the use of a lever to amplify the amount of displacement due to thermal expansion contributes to miniaturization compared to such a solenoid valve that does not use a lever.
  • FIG. 18 A diagram showing the basic concept of the function of the three-way valve in the first embodiment.
  • FIG. It is a figure which shows the basic concept of the function of a three-way valve.
  • FIG. 2 A front view of the three-way valve.
  • FIG. 4 A bottom view of the three-way valve. ⁇ 2020/175549 3 boxes (:171? 2020/007725
  • Fig. 5 is a cross-sectional view taken along line V _ V of Fig. 2, showing a state in which no current is applied.
  • Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 2, showing the state when the power is not supplied.
  • Fig. 7 is a cross-sectional view taken along the line V I I -V I I in Fig. 2, showing the state when the power is not supplied.
  • FIG. 8 is an enlarged sectional view of the valve module and its surroundings.
  • FIG. 9 An exploded view of the microvalve.
  • FIG. 10 is a front view of the microvalve.
  • Fig. 10 is a cross-sectional view taken along the line X I -X I of Fig. 10, showing the state when the power is not supplied.
  • Fig. 12 is a cross-sectional view taken along the line X I I -X I I in Fig. 10, showing the state when no current is applied.
  • Fig. 13 is a cross-sectional view taken along line X-X1 in Fig. 10, showing a state when energized.
  • Fig. 14 is a cross-sectional view taken along the line X I I -X I I in Fig. 10 showing a state when energized.
  • Fig. 15 is a sectional view taken along line V _ V in Fig. 2, showing a state when energized.
  • Fig. 16 is a cross-sectional view taken along the line VI-VI of Fig. 2, showing the state when energized.
  • Fig. 17 is a cross-sectional view taken along line V I-V I I of Fig. 2, showing a state when energized.
  • FIG. 18 is a diagram showing a non-operating state.
  • FIG. 188 A diagram showing a non-operating state.
  • Fig. 19 is a diagram showing a first state.
  • FIG. 198 is a diagram showing a first state.
  • FIG. 20A is a diagram showing a second state.
  • FIG. 208 is a diagram showing a second state.
  • FIG. 21 A refrigeration cycle diagram including a cross section of a main part of an expansion valve according to a second embodiment.
  • FIG. 22 A vertical cross-sectional view of the expansion valve, showing a cross-sectional position different from that in Fig. 1.
  • FIG. 23 is a cross-sectional view of the expansion valve.
  • Fig. 24 is a configuration diagram of a refrigerant circuit including a four-way valve in a third embodiment, showing a state in which the valve body is shifted to the left.
  • FIG. 25 is an enlarged cross-sectional view of the valve module and its surroundings.
  • FIG. 26 An exploded view of the microvalve.
  • FIG. 27 is a front view of the microvalve. ⁇ 2020/175 549 4 ⁇ (:171? 2020 /007725
  • Fig. 27 is a cross-sectional view taken along the line X X V ⁇ I-XX V I I of Fig. 27, showing the state when the power is not supplied.
  • Fig. 27 is a sectional view taken along the line X X ⁇ _ ⁇ ⁇ X in Fig. 27, showing the state when the power is not supplied.
  • Fig. 30 Fig. 27 is a cross-sectional view taken along the line X X V ⁇ I-XX V I I of Fig. 27, showing the state when the maximum power is supplied.
  • Fig. 27 is a cross-sectional view taken along line X X ⁇ _ ⁇ ⁇ of Fig. 27, showing the state at the maximum power supply.
  • Fig. 32 is a configuration diagram of a refrigerant circuit including a four-way valve, showing a state where the valve body is shifted to the right.
  • FIG. 33 A sectional view of a compressor and a four-way valve according to a fourth embodiment.
  • FIG. 34 is a sectional view of the microvalve in the fifth embodiment.
  • Fig. 35 is an enlarged view of an X X X V section in Fig. 34.
  • FIG. 36 A sectional view of a microvalve according to a sixth embodiment.
  • Fig. 37 is an enlarged view of the XX section of Fig. 36.
  • the three-way valve ⁇ which is the valve device according to the present embodiment, is arranged between the outdoor heat exchanger and the expansion valve, and switches the flow direction of the refrigerant in the refrigeration cycle for switching between cooling and heating.
  • This three-way valve has three fluid inlets and outlets.
  • the refrigeration cycle may be a freeze/freeze cycle used in a vehicle air conditioner.
  • the three fluid inlets and outlets are the first port 1, the second port 2 and the third port 3, as shown in Fig. 18 and Fig. 1m.
  • the three-way valve ⁇ includes a block body 100 made of a metal such as an aluminum alloy and a valve module X 0 attached to the block body 100.
  • a block body 100 made of a metal such as an aluminum alloy and a valve module X 0 attached to the block body 100.
  • a second port 2 and a screw hole 9 are formed on the front surface of the block body 100, and a check valve lid 22 is mounted on the upper left portion thereof.
  • a first port 1 and a screw hole 9 are formed on the right side surface of the block body 100.
  • a third port 3 and a screw hole 9 are formed on the bottom surface of the block body 100.
  • Fig. 5 is a sectional view taken along line V _ V in Fig. 2, showing a horizontal section of the block body 100.
  • Fig. 6 is a cross-sectional view taken along line V-V I of Fig. 2
  • Fig. 7 is a cross-sectional view taken along line V-V I of Fig. 2.
  • Figures 5, 6 and 7 all show the non-energized state of the three-way valve ⁇ .
  • a first port 1 is formed on the right side surface of the block body 100, a second port 2 is formed on the front surface, and a third port 3 is formed on the lower surface, and as shown in FIG.
  • the 1st port 1 has a continuous 1st port conduit 18.
  • the second port 2 has a second port conduit 23 formed continuously.
  • the third port 3 is continuously formed with a third port conduit 33.
  • the valve portion 8 is arranged at the end of the first port conduit 13.
  • the valve section includes a valve chamber 10, a valve seat 11, a valve lid 12, a valve body 13, a panel receiving recess 14, a panel 16 and a ball valve 1 It has 5 and.
  • the valve chamber 10 includes a cylindrical space formed in the block body 100 and an inner surface of the block body 100 that surrounds the space.
  • the valve seat 11 is formed at the bottom of the valve chamber 10.
  • the valve lid 12 is screwed into the block body 100 at the large diameter portion above the valve chamber 10. ⁇ 2020/175 549 6 ⁇ (:171? 2020 /007725
  • the valve body 13 is a piston-shaped member that is vertically slidably arranged in the valve chamber 10.
  • the panel receiving recess 14 is a recess formed in the upper portion of the valve body 13.
  • the spring 16 is arranged in the valve back pressure chamber 17 between the valve lid 12 and the valve body 13.
  • the ball valve 15 is a ball-shaped member that is caulked to the lower surface of the valve body 13.
  • the first port conduit 13 is connected to the side of the valve chamber 10.
  • the member composed of the valve body 13 and the ball valve 15 is displaced in the valve chamber 10 so that the communication between the first port 1 and the second port 2 through the valve chamber 10 It is a valve body that switches the cutoff to adjust the flow rate of the refrigerant.
  • valve module X 0 the configuration of the valve module X 0 will be described with reference to FIG. 7, FIG. 8, FIG. 9, FIG. 10, FIG. 11, FIG. 11, FIG. 12, FIG. 13, and FIG.
  • the valve module ⁇ includes a micro valve XI, a valve casing X2, a sealing member X3, two ⁇ rings X4, X5, and two electrical wirings X. Has 6, X 7.
  • the microvalve 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.
  • Energizing and de-energizing the three-way valve ⁇ means energizing and de-energizing this Micro Valve X 1.
  • Microvalve XI functions as a pilot valve.
  • the electric wiring X6, 7 extends from the surface opposite to the valve casing X2 among the two plate surfaces on the front and back of the micro valve X1, and the sealing member X3, the valve 7 ⁇ 2020/175 549 7 ⁇ (:171? 2020 /007725
  • the valve casing 2 is a resin casing that houses the microvalve X 1.
  • the valve casing 2 is formed by resin molding with polyphenylene sulfide as a main component.
  • the valve casing X 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 X 2 is interposed between the block body 100 and the micro valve X 1 so that the micro valve X 1 and the block body 100 do not directly contact each other. Then, one surface of the bottom wall is in contact with and fixed to the block body 100, and the other surface is in contact with and fixed to one of the two plate surfaces of the microvalve X 1.
  • valve casing X 2 can absorb the difference in linear expansion coefficient between the microvalve X 1 and the block body 100. This is because the linear expansion coefficient of the valve casing X 2 is a value between the linear expansion coefficient of the microvalve X 1 and the linear expansion coefficient of the block body 100.
  • 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 projecting portion 21 and the second projecting portion 22 are fitted in the recess formed in the block body 100.
  • the first projecting portion 21 is formed with a first communicating hole 1 which penetrates from the micro valve X I side end to the third communicating hole 8 side end.
  • the flow path directly from the outside of the three-way valve 0 to the third port 2 and the third communication hole 8 are always connected via the third port 2. Therefore, the third communication hole 8 corresponds to the external communication passage.
  • the second projecting portion X 22 is formed with a second communicating hole 2 which penetrates from the micro valve X 1 side end to the pilot hole 7 side end.
  • the sealing member X3 seals the opened other side of the valve casing X2. It is a member made of epoxy resin.
  • 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 microvalve X 1. Further, the sealing member X 3 covers the electric wirings X 6 and X 7 to realize waterproofing and insulation of the electric wirings X 6 and X 7.
  • 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, and the block body 1
  • the ring X5 is attached to the outer periphery of the second protrusion X22, and seals between the block body 100 and the second protrusion X22 to prevent leakage of refrigerant to the outside of the three-way valve P0. Suppress.
  • the micro valve X 1 is a MEMS including a first outer layer X 11 which is a semiconductor, an intermediate layer X 12 and a second outer layer X 13 which are all semiconductors.
  • M E M S is an abbreviation for 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, The second outer layer X 13 is laminated in this order.
  • the intermediate layer X 1 2 is sandwiched from both sides by the first outer layer X 1 1 and the second outer layer X 1 3.
  • 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 X11 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 9, the first outer layer X 11 has two through holes X 14 and X 15 penetrating the front and back sides. 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. 9, FIG. 11, and FIG. 12, the second outer layer X 13 has a first refrigerant hole X 16 and a second refrigerant hole X 17 penetrating both sides. Shown in Figure 12 ⁇ 2020/175 549 9 ⁇ (:171? 2020 /007725
  • first refrigerant hole X I 6 communicates with the first communication hole V 1 of the valve casing X 2
  • the second refrigerant hole X I 7 communicates with the second communication hole 2 of the valve casing X 2.
  • the hydraulic diameter of each of the first refrigerant hole X I 6 and the second refrigerant hole X I 7 is, for example, not less than 0.10!!! and not more than 30!!!.
  • 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. 11, the first fixed part XI 21, the second fixed part X 122, the multiple first ribs 1 23, the multiple second ribs 1 24, the spine XI 25, the arm XI 26, beam X 1 27, moving part X 1 28
  • the first fixing portion X 1 21 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 122, 1st rib X 1 23, 2nd rib XI 24, spine XI 25, arm X 1 26, beam X 1 2 7, movable part X 1 It is formed so as to surround 28 in the same one refrigerant chamber X 19.
  • the refrigerant 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.
  • 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 X6 and X7 are electric wirings for changing the temperature of the plurality of first ribs X123 and the plurality of second ribs X124 to change the temperature.
  • 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 refrigerant 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 122 is fixed to the first outer layer X 11 and the second outer layer X 13.
  • the second fixing portion X 1 22 is surrounded by the first fixing portion X 1 2 1 and arranged apart from the first fixing portion X 1 2 1.
  • first ribs 1 Multiple first ribs 1 23, multiple second ribs 1 24, spine X 1 2 ⁇ 2020/175 549 10 ⁇ (:171? 2020 /007725
  • arm X 1 26, beam X 1 27, movable part X 1 28 are not fixed to the first outer layer X 11 and the second outer layer X 1 3, and the first outer layer X 1 1 and the second outer layer X 1 3 It is displaceable with respect to the outer layer X 1 3.
  • the spine X I 25 has a rectangular rod shape of the intermediate layer X 12 extending in the lateral direction and having an elongated rod shape. 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 fixed 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. ⁇ 2020/175 549 1 1 ⁇ (: 171? 2020 /007725
  • first ribs 1 2 3 Multiple second ribs 1 2 4, spine X 1 2
  • the arm X I 26 has a slender rod shape that extends non-orthogonally and in parallel with the spine X 125. 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 25 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 92 of 1 2 7 and the connection position X 3 of the beam X 1 27 and the movable part X 1 28 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 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.
  • the movable part X I 28 can move integrally with the beam X I 27 in the refrigerant chamber X 19.
  • the movable portion X 1 2 8 moves in such a manner so that the first refrigerant hole X 1 6 and the second refrigerant hole X 1 7 communicate with each other through the refrigerant chamber X 1 9 at a certain position, When in another position, the first refrigerant hole XI 6 and the second refrigerant hole XI 7 are shut off in the refrigerant chamber XI 9.
  • the movable part X 1 28 has a frame shape surrounding a through hole X 1 20 penetrating the front and back of the intermediate layer X 1 2. Therefore, the through hole X 1 2 0 also moves integrally with the movable portion X 1 2 8.
  • the through hole X120 is part of the refrigerant chamber X19.
  • first application point X1 2 9 near the portion of the first fixed portion X 1 2 1 that is connected to the plurality of first ribs X 1 2 3 has the first application point X 1 2 9 shown in FIG. 1 Outer layer X 1 1 1 Through hole ⁇ 2020/175 549 12 ⁇ (:171? 2020 /007725
  • the end of the electrical wiring X 6 that passes through X 14 is connected to the micro valve X 1 side end.
  • the microvalve X of the electrical wiring X 7 passing through the through hole X 1 5 of the first outer layer X 1 1 shown in FIG. One end is connected.
  • valve module X 0 When the micro valve X 1 is energized, a voltage is applied from the electrical wiring X 6, X 7 to the first application point X I 29 and the second application point X 1 30. Then, a current flows through the plurality of first ribs X 1 2 3 and the plurality of second ribs X 1 2 4. Due to this current, the plurality of first ribs X 1 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 X I 2 3 and the plurality of second ribs X I 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 2 5 toward the connection position 2 side. To do.
  • 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 I 2 6 integrally changes its posture with the hinge X 0 as a fulcrum and the connection position 2 as a force point.
  • the moving part X 1 28 connected to the end of the beam XI 2 7 opposite the arm XI 2 6 is also in the longitudinal direction on the side where the spine XI 2 5 pushes the beam XI 2 7. , Moving.
  • 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. 13 and 14.
  • 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 with 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 connection position ⁇ 2020/175 549 13 ⁇ (: 171-1? 2020/007725
  • connection position X 3 which is the point of action, is larger than the amount of movement of 2. Therefore, the amount of displacement due to thermal expansion is amplified by the lever and transmitted to the movable part X 1 28.
  • the flow path of the refrigerant in the micro valve X 1 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 through hole X 1 20 is formed in a direction orthogonal to the plate surface of the intermediate layer X 1 2.
  • the second refrigerant hole X 17 overlaps with the movable portion X 1 28 in the direction orthogonal to the plate surface of the intermediate layer X I 2. That is, the second refrigerant hole X I 7 is closed by the movable portion X 1 28. Therefore, in this case, the first refrigerant hole X 16 and the second refrigerant hole X 17 are blocked in the refrigerant chamber X 19.
  • the microvalve X 1 thus configured can be easily miniaturized as compared with a solenoid 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 miniaturization compared to an electromagnetic valve that does not use such a lever.
  • both the micro valve X 1 and the valve module X 0 have the refrigerant flow path of the II turn structure, it is possible to reduce the digging of the block body 100. That is, the depth of the recess formed in the block body 100 for disposing the valve module X 0 can be suppressed. The reason is as follows.
  • the valve module ⁇ does not have a refrigerant flow path with a II-turn structure, the valve module ⁇ has a refrigerant inlet on the block body 100 side, and the valve module ⁇ 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. Therefore, if it is attempted to accommodate the refrigerant flow passages on both sides of the valve module X 0 in the block body 100, the recess that must be formed in the block body 100 in order to arrange the valve module becomes deep. Will end up. Further, since the microvalve X I itself is small, it is possible to further reduce the digging of the block body 100.
  • the micro valve X1 is lightweight, the three-way valve ⁇ is also lightweight. Since the power consumption of the micro valve X 1 is small, the power consumption of the three-way valve ⁇ is reduced.
  • the check valve section ⁇ 3 is formed horizontally on the left side of the valve chamber 10.
  • the check valve portion 0 has a check valve chamber 20 which is bored in the block body 100 and extends horizontally.
  • a check valve seat 21 is formed at the bottom of the check valve chamber 20 (ie, the upper portion in FIG. 5 and the left portion in FIG. 6).
  • the central hole of 2 1 and the valve chamber 10 of the valve portion communicate with each other through a first communication hole 5.
  • a piston-like check valve body 23 is arranged inside the check valve chamber 20 so as to be slidable in the front-back direction (that is, the vertical direction in Fig. 5). It A ball-shaped ball valve 25 is caulked at the end of the check valve body 2 3 on the check valve seat 21 side (that is, the upper end in FIG. 5, the left end in FIG. 6).
  • a spring receiving recess 24 and a check valve lid 22 are formed on the side of the check valve body 23 opposite to the ball valve 25 side.
  • a spring 26 is arranged between the panel receiving recess 24 and the check valve lid 22. The spring 26 presses the ball valve 25 toward the check valve seat 21.
  • the check valve lid 22 is screwed and attached to the block body 100 at the opening of the check valve chamber 20.
  • a check back pressure chamber 27 is formed between the check valve lid 22 and the check valve body 23. Further, as shown in FIG. 6, the check back pressure chamber 27 and the third port conduit 33 are communicated with each other through the second communication hole 6.
  • valve section As described above, the valve section, the check valve section 0, and the valve module ⁇ are three-dimensionally arranged in the block body 100. Therefore, in the following description of the operation, in addition to FIGS. 15 to 17, in order to facilitate understanding of the operation, the above-mentioned components are rearranged in a plane for the sake of simplicity. The explanation will be made with reference to FIG. 18 (18), FIG. 19 (8), FIG. 19 (9), FIG. 20 (8) and FIG. Note that in FIGS. 189, 119, 209, and 20, regions where high-pressure refrigerant is present are indicated by dark hatching, and regions where low-pressure refrigerant is present are thinner. Represented by hatching.
  • Fig. 188 and Fig. 18 are illustrations of the non-operating state.
  • the high pressure refrigerant flows from the first port 1 to the third port 3 in the first state, that is, in the state where the three-way valve 0 is operated with the micro valve X1 de-energized. It is an explanatory diagram of the case.
  • the low-pressure refrigerant flows from the first port 1 to the second port 2 in the second state, that is, in the state where the micro valve X 1 is energized to operate the three-way valve ⁇ . It is explanatory drawing of a case. ⁇ 2020/175 549 17 ⁇ (: 171-1? 2020/007725
  • the high-pressure refrigerant acts from the first port 1 to flow the high-pressure refrigerant from the first port 1 to the third port 3, as shown in FIGS.
  • the micro valve X1 is not energized and is in the closed state. Therefore, since the third communication hole 8 and the pilot hole 7 are shut off from each other, the refrigerant pressure in the valve back pressure chamber 17 is maintained. Then, the refrigerant pressure in the valve chamber 10 and the refrigerant pressure in the valve back pressure chamber 17 with respect to the valve body 13 and the ball valve 15 become substantially equal. Further, as shown in FIG.
  • the ball valve 1 5 acts low pressure refrigerant from the second port line 2 3 side, with respect to the valve body 1 3, the valve back pressure chamber 1 7 side
  • the high pressure refrigerant pressure from is larger in pressure receiving area. Therefore, the ball valve 15 is closed in combination with the spring pressure of the panel 16.
  • the high-pressure refrigerant passing through the valve portion 8 passes through the first communication hole 5 and is located below the ball valve 25 of the check valve portion ⁇ . From (that is, from the upper side in Fig. 5). That is, the force acts on the ball valve 25 in the opening direction. Further, the refrigerant in the check back pressure chamber 27 flows out to the third port line 33 through the second communication hole 6, and therefore the back pressure cannot be maintained. Therefore, the check valve section ⁇ is opened. As a result, the high pressure refrigerant flows from the first port 1 to the third port 3. At this time, the low-pressure refrigerant acts on the second port 2, but this is not an essential constituent element.
  • valve back pressure chamber 17 Is lower than the pressure in the second port line 23. Therefore, the force generated by the differential pressure between the two sides of the valve body 13 exceeds that of the panec of the panel 16 so that the valve chamber 10 opens. As a result, low-pressure refrigerant in the valve chamber 1 in ⁇ flows out from the second port 2 through the second port line 2 3 from the valve seat 1 1.
  • the low-pressure refrigerant in the valve chamber 10 reaches the lower surface of the ball valve 25 through the first communication hole 5 and acts to move the ball valve 25 upward.
  • the high-pressure refrigerant flowing in through the third port 3 fills the check valve chamber 20 of the check valve section O. Therefore, since the refrigerant pressure from the check back pressure chamber 27 (that is, from the top to the bottom) to the check valve body 23 and the ball valve 25 is greater than the refrigerant pressure from the bottom, the check valve portion ⁇ 3 will be kept closed. In this way, the high pressure refrigerant flowing from the first port 1 flows out to the second port 2.
  • the three-way valve ⁇ uses the valve module X 0 rather than the solenoid valve, as compared with the three-way valve described in Patent Document 1. Therefore, as compared with the three-way valve described in Patent Document 1, the three-way valve ⁇ can be made smaller and quieter.
  • the refrigeration cycle in Fig. 21 is used in a vehicle air conditioner that has independently controllable air conditioning units on the front seat side and rear seat side of the vehicle.
  • the refrigeration cycle in FIG. 21 is equipped with a compressor ⁇ 10.
  • This compressor ⁇ 10 ⁇ 2020/175 549 19 ⁇ (:171? 2020/007725
  • An electromagnetic clutch (not shown) that connects and disconnects power transmission is mounted on the.
  • power is transmitted from a vehicle engine (not shown) to operate the compressor 010, which compresses the intake refrigerant and discharges it as a high-temperature high-pressure gas refrigerant.
  • the condenser 0 11 cools and condenses the gas refrigerant discharged from the compressor 0 1 0 by receiving an air cooling action by a cooling fan (not shown), and the condensed liquid refrigerant flows into the receiver 0 1 2.
  • the liquid receiver 0 12 separates the condensed refrigerant that has flowed into the liquid receiver into gas and liquid, and allows only the liquid refrigerant to flow out.
  • the first and second expansion valves 0 1 3 and 0 1 4 for decompressing and expanding the liquid refrigerant into a gas-liquid two-phase state and the first and second expansion valves are provided on the downstream side of the liquid receiver 0 1 2, the first and second expansion valves 0 1 3 and 0 1 4 for decompressing and expanding the liquid refrigerant into a gas-liquid two-phase state and the first and second expansion valves are provided.
  • the first and second evaporators 0 15 and 0 16 for evaporating the refrigerant passing through the expansion valves 0 13 and 0 14 are arranged in parallel with each other.
  • the first expansion valve 0 1 3 and the first evaporator 0 15 are provided in the front air conditioning unit 0 17 arranged on the instrument panel part in the front of the vehicle compartment, and Used for air conditioning on the front seat side.
  • the first expansion valve 0 13 is a temperature type expansion valve whose valve opening is automatically adjusted so as to maintain the superheat degree of the outlet refrigerant of the first evaporator 0 15 at a predetermined value. ..
  • the first expansion valve 0 13 has a temperature sensing cylinder 0 13 3 that senses the temperature of the refrigerant at the outlet of the first evaporator 0 15 and changes the internal refrigerant pressure.
  • the second expansion valve 0 14 and the second evaporator 0 16 are installed in the rear part of the vehicle interior, for example, in the rear air conditioning unit 0 1 8 arranged at the ceiling part of a wagon type automobile. It is installed and used for air conditioning on the rear seat side in the passenger compartment.
  • the second expansion valve 0 1 4 is a valve device.
  • air conditioners such as air blowers are built into the front and rear air conditioning units 0 17 and 0 18.
  • the refrigerant outlet sides of the first and second evaporators 0 15 and 0 16 join and are connected to the suction side of the compressor 0 1.
  • This second expansion valve 0 14 is configured as a box-type expansion valve
  • the low-pressure refrigerant channel 0 1 4 0 through which the outlet refrigerant of the second evaporator 0 1 6 flows and a temperature-sensing mechanism described later that senses the refrigerant temperature of the low-pressure refrigerant channel 0 1 4 0 are integrally incorporated. ⁇ 2020/175 549 20 ⁇ (:171? 2020 /007725
  • a valve module ⁇ is integrally assembled to the box-type second expansion valve ⁇ 14.
  • the configuration of the valve module ⁇ is the same as that of the first embodiment.
  • the microvalve X 1 included in the valve module X 0 functions as a pilot valve.
  • the second expansion valve 0 1 4 includes a prismatic valve body 0 1 4 1 formed of a metal such as aluminum.
  • the valve body 0 1 4 1 corresponds to the body.
  • this valve body ⁇ 1 41 is provided with a refrigerant inlet 0 1 4 1 3 and a refrigerant outlet 0 1 4 1 13 at a position near the lower side of its outer peripheral wall. ..
  • the high-pressure side liquid refrigerant from the liquid receiver 0 1 2 flows into the refrigerant inlet port 0 1 14 13.
  • the refrigerant outlet ⁇ 1 41 causes the low-pressure refrigerant decompressed and expanded in the throttle passage ⁇ 1 4 4 described later to flow out from the valve body ⁇ 1 4 1.
  • the refrigerant outlet 0 1 4 1 13 is connected to the cooling medium inlet 0 1 6 3 of the second evaporator 0 1 6. Coolant inlet 0 1 4 1 3 and the refrigerant outlet 0 1 4 1, first port _ Bok respectively, corresponding to the second port.
  • a low-pressure refrigerant flow path 0 1 4 0 is provided in a portion on the upper side of the valve body 0 1 41 so as to penetrate in a direction perpendicular to the axis of the valve body 0 1 4 1.
  • a refrigerant inflow port 0 1 4 1 0 and a refrigerant outflow port 0 1 4 1 are opened at both ends of the refrigerant flow channel 0 1 4 0.
  • the refrigerant inflow port 0 1 41 0 is connected to the cooling medium outlet 0 16 of the second evaporator 0 16 so that the gas refrigerant evaporated in the second evaporator 0 16 flows in.
  • the inflow gas refrigerant further flows out of the valve main body 0 1 4 1 through the low pressure refrigerant flow path 0 1 4 0 and the refrigerant outlet 0 1 4 1 1.
  • the refrigerant outlet port 0 1 41 1 is connected to the suction side of the compressor 0 1.
  • a stepped inner hole ⁇ 1 4 2 is coaxially formed in the center of the valve body 0 1 4 1, and the stepped inner hole ⁇ 1 4 2 connects the low pressure refrigerant flow path 0 1 4 0 Through it, the center of the valve body ⁇ 1 41 is extended vertically.
  • a valve seat 0 1 4 3 is formed at the lower end of this stepped bore 0 1 4 2.
  • a spherical valve body 0 1 4 4 is arranged so as to be vertically movable so as to face the valve seat 0 1 4 3.
  • the refrigerant inlet 0 1 4 1 throttle channels for decompressing and expanding the high-pressure side liquid refrigerant from 3 0 1 4 4 3 ⁇ 2020/175549 21 ⁇ (: 171-1?2020/007725
  • valve body 0 1 4 4 is displaced in the storage chamber 0 5 1 so that the storage chamber 0
  • the actuating rod 0 1 45 is fitted to the lower part of the stepped bore 0 1 4 2 so as to be movable in the vertical direction.
  • the lower end of the actuating rod 0 1 4 5 contacts the spherical valve body 0 1 4 4 to displace the spherical valve body 0 1 4 4.
  • a small-diameter portion ⁇ 145 3 is formed in the lower part of this working rod ⁇ 1 4,5.
  • An annular refrigerant flow path 0 1 45 is formed between the small diameter portion 0 1 4 5 3 and the inner peripheral surface of the stepped inner hole 0 1 4 2.
  • a communication hole 0 1 4 6 is formed in a direction orthogonal to the stepped inner hole 0 1 4 2.
  • the annular coolant flow path 0 1 4 5 is always in communication with one end of the communication hole 0 1 4 6.
  • the other end of the communication hole 0 1 46 is always in communication with the second communication hole 2 of the valve module 0.
  • the valve body ⁇ 1 41 is formed with a refrigerant flow passage ⁇ 1 48.
  • One end of this refrigerant flow path 0 1 4 8 is always in communication with the refrigerant outlet port 0 1 41.
  • the other end of the refrigerant passages 0 1 4 8 is always in communication with the first communication hole 1 of the valve module ⁇ .
  • the flow path directly from the outside of the second expansion valve 0 14 to the refrigerant outlet 0 1 4 1 13 is the refrigerant inlet 0 1 6 3 of the second evaporator ⁇ 3 16 and the refrigerant flow. Exit 0 1 4 1 It is a flow path between them.
  • This flow path and the third communication hole 8 are always in communication with each other via the third port 2. Therefore, the third communication hole 8 corresponds to the external communication passage.
  • the diaphragm actuator 030 that constitutes the valve body operating mechanism includes two casing members 031 and 032, which are upper and lower, and a diaphragm 033, which is a pressure responsive member.
  • the casing members 031 and 032 are made of stainless steel, and the outer peripheral edge of the disk-shaped diaphragm 033, which is also made of stainless steel, is clamped and fixed. ⁇ 2020/175 549 22 ⁇ (:171? 2020 /007725
  • the disk-shaped diaphragm 033 is assembled so as to be elastically deformable in the vertical direction in Fig. 21.
  • the inner space of the casing members 0 3 1, 0 3 2 is divided by the diaphragm 0 3 3 into a temperature-sensitive chamber (that is, the first pressure chamber) 0 34 and a pressure equalizing chamber (that is, the second pressure chamber) 0 35. ing.
  • the same refrigerant as the refrigerating cycle circulating refrigerant is enclosed by a capillary tube 036 at a fixed pressure.
  • annular opening ⁇ 3 2 3 of the lower casing member ⁇ 3 2 is the large-diameter opening end ⁇ 1 4 formed at the upper end of the stepped inner hole ⁇ 1 4 2 of the valve body ⁇ 1 41. It is fixed to 2 3 with screws.
  • This screw fixing part is constructed so that airtightness is maintained by a rubber ring (that is, elastic sealing material) 037.
  • the temperature-sensitive rod 040 is formed in a cylindrical shape from a metal material having good heat conduction such as aluminum, and in order to detect the temperature of the refrigerant at the outlet of the evaporator, the temperature-sensitive rod 040 is shown in Figs.
  • the low-pressure refrigerant passage 0140 is arranged so as to pass the gas refrigerant from the outlet of the evaporator.
  • the upper end of the temperature sensitive rod 0 4 0 is configured as a large diameter portion 0 4 1. This large-diameter portion 0 4 1 is arranged in the pressure equalizing chamber 0 3 5, and comes into contact with one surface (that is, the lower side surface) of the disk-shaped diaphragm 0 3 3.
  • the refrigerant pressure is a pressure corresponding to the temperature of the evaporator outlet refrigerant flowing through the low-pressure refrigerant channel 0 140.
  • the temperature sensitive rod ⁇ 340 is fitted in the stepped inner hole ⁇ 142 of the valve body 0141 so as to be slidable in the axial direction.
  • the temperature sensitive rod 0 40 also serves as a displacement transmission member that transmits the displacement of the diaphragm 0 3 3 to the valve body 0 1 4 4 via the above-mentioned operating rod 0 1 4 5.
  • the other end portion (that is, the lower end portion) of the temperature sensitive rod 0 40 is in contact with one end portion (that is, the upper end portion) of the operating rod 0 1 45.
  • a rubber ⁇ ring that is, an elastic seal material
  • ⁇ is located between the low-pressure refrigerant flow passage 0 140 and the pressure equalizing chamber ⁇ 35. 4 2 are arranged.
  • this ring 0 4 2 the low pressure refrigerant flow path 0 1 4 0 and the pressure equalizing chamber ⁇ 2020/175 549 23 ⁇ (:171? 2020 /007725
  • a pressure chamber ⁇ 3 4 3 is formed between the intermediate stepped surface 0 1 4 2 and 2. Further, the valve body 0 1 41 is formed with a communication hole 0 4 4. One end of the communication hole 0 4 4 is always connected to the communication hole 0 1 4 6, and the other end is always connected to the pressure chamber 0 4 3.
  • the temperature-sensitive rod ⁇ 40 has a communication hole ⁇ 45 opened axially through the center of the temperature-sensitive rod ⁇ 40, and the groove ⁇ 3 4 6 are provided. Therefore, even if the lower end of the temperature sensitive rod 0 4 0 contacts the upper end of the operating rod 0 1 4 5, the pressure chamber 0 4 3 always communicates with the communication hole 0 4 5 through the groove ⁇ 3 4 6. ing.
  • the refrigerant pressure between 2 and the throttle channel 0 1 4 4 3 is introduced through the communication hole 0 4 4, the pressure chamber 0 4 3, the groove part 0 4 6 and the communication hole 0 4 5 in this order.
  • the communication hole 044, the pressure chamber 043, the groove part 046, and the communication hole 045 are pressure introduction flow paths.
  • the communication hole 045 is connected with an auxiliary communication hole ⁇ 453 which extends in the radial direction from the center of the temperature sensing rod0450, and the auxiliary communication hole 04053 also provides a uniform connection.
  • the refrigerant pressure is introduced into the pressure chamber 0 35.
  • a rubber ⁇ ring that is, an elastic seal
  • Material 0 47 is provided.
  • This ring 047 maintains the airtightness between the low-pressure refrigerant channel 0140 and the pressure chamber 043.
  • a spring mechanism 050 for applying a predetermined spring force to the valve body 0144 of the second expansion valve 014 will be described.
  • the accommodation chamber ⁇ 5 1 of the spring mechanism ⁇ 50 is formed below the stepped inner hole ⁇ 1 4 2. As shown in FIG.
  • this storage chamber 0 51 communicates with a refrigerant inlet port 0 1 14 1 3 into which a high-pressure liquid refrigerant flows.
  • a metal support plate 0 5 2 joined to a stainless valve body 0 1 4 4 by welding or the like is arranged at the upper end of the accommodating chamber 0 51.
  • the above-mentioned valve body 1 4 4 is also accommodated in the accommodation chamber 0 5 1. Therefore ⁇ 2020/175 549 24 ⁇ (:171? 2020 /007725
  • the accommodation room 0 51 is also a valve room.
  • One end of the coil spring 053 is abutted on and supported by the support plate 052.
  • the other end of the coil spring 0 53 is supported by a metal plug 0 54.
  • the plug 054 serves as a lid member that closes the open end of the accommodation chamber 051 to the outside, and is also detachably fixed to the valve body 0 1 4 1 with screws.
  • the degree of superheat of the refrigerant at the outlet of the evaporator, which is set by the second expansion valve 0 14, can be adjusted by adjusting the above-mentioned Baneka. Further, a rubber o-ring (that is, an elastic seal material) ⁇ 3 5 5 is provided at the tip end side portion of the plug 0 5 4. This ring 055 maintains the airtightness between the storage chamber 051 and the outside.
  • the compressor 0 1 0 When the compressor 0 1 0 operates by receiving power from the vehicle engine via the electromagnetic clutch, the compressor 0 1 0 operates in the downstream flow path of the first and second evaporators 0 15 and 0 16. The refrigerant is sucked and compressed, and the high-temperature and high-pressure gas refrigerant is discharged toward the condenser 0 1 1. Then, in this condenser 0 11, the gas refrigerant is cooled and condensed.
  • the condensed refrigerant next flows into the receiver 0 12 and the gas-liquid of the refrigerant is separated, and the liquid refrigerant flows out of the receiver 0 1 2 and is placed in parallel with the first receiver.
  • the first expansion valve 0 13 decompresses and expands the liquid refrigerant from the receiver 0 12 so that the low-temperature low-pressure gas-liquid 2 It becomes a phase state.
  • This gas-liquid two-phase refrigerant absorbs heat from the conditioned air in the first evaporator 0 15 and evaporates. ⁇ 2020/175 549 25 ⁇ (:171? 2020 /007725
  • the conditioned air is cooled and becomes cold air, and the front seat side in the vehicle compartment is conditioned.
  • the opening degree of the first expansion valve 0 13 is automatically adjusted to the opening degree according to the evaporator outlet refrigerant temperature sensed by the temperature sensing tube 0 1 33, and the evaporator outlet refrigerant overheat is detected. Maintain the degree at a predetermined value.
  • the refrigerant temperature of the low-pressure refrigerant passage 0 1440 formed in the valve body 0 1 4 1 of the second expansion valve ⁇ 3 1 4 has risen to a temperature of about room temperature.
  • the temperature of the greenhouse 034 is also around room temperature.
  • the communication hole ⁇ 1 46 communicates with the high pressure side of the refrigeration cycle via the throttle flow path ⁇ 1 4 4 3 and has a high pressure side pressure.
  • valve body 0 1 4 4 and the valve seat ⁇ 3 1 4 3 are made of metal, the valve body ⁇ 1 4 4 does not become a strictly closed state, and The high-pressure side pressure of the storage chamber 0 5 1 leaks to the communication hole 0 1 4 6 side through a small gap with the valve seat 0 1 4 3.
  • the minute gap between the valve body 0 1 4 4 and the valve seat ⁇ 3 1 4 3 is an extremely fine gap, when the micro valve X 1 is closed, the communication hole ⁇ 1 4 6 Is almost dense ⁇ 2020/175 549 26 ⁇ (:171? 2020 /007725
  • the sealed space is filled with the liquid refrigerant, the liquid refrigerant may expand due to an increase in the ambient temperature around the expansion valve, and the pressure in the sealed space may rise abnormally.
  • the valve body 0 1 4 1 has a minute hole 0 5 0 0 that connects the communication hole 0 1 4 6 to the storage chamber 0 5 1 of the spring mechanism 0 50, the pressure rise due to the expansion of the liquid refrigerant is increased. Can escape to the accommodation chamber 051 side through the micro holes 0500.
  • the resistance of the small holes 0500 is extremely large compared to the throttle channels 0144. As a result, it is possible to reliably prevent abnormal pressure rise in the communication holes 0 1 46.
  • the pressure in the pressure equalizing chamber ⁇ 35 of the diaphragm actuator ⁇ 30 gradually decreases to the low pressure side pressure through the above-mentioned pressure introduction flow path after the micro valve X1 is opened.
  • the communication hole 044 of the pressure introduction flow path communicates with the low-pressure side refrigerant flow path 014 through the communication hole 0146 and the micro valve X1.
  • the refrigerant flow paths 0 1 4 8 exert pressure on the pressure introduction flow path. Therefore, the opening degree of the valve body ⁇ 1 4 4 of the second expansion valve 0 1 4 also gradually increases, and as a result, the flow rate of the refrigerant passing through the second expansion valve 0 1 4 also gradually increases. To do.
  • valve body 0 1 4 4 of the second expansion valve ⁇ 3 1 4 is displaced to a position corresponding to the balance between the pressure difference between the refrigerant pressure corresponding to the inlet refrigerant temperature and the spring force of the coil spring 0 5 3. ..
  • the valve body 0 1 4 4 of the second expansion valve 0 1 4 opens the throttle passage 0 1 4 4 3 so that the evaporator outlet refrigerant maintains a certain degree of superheat.
  • the second expansion valve 0 14 adjusts the refrigerant flow rate as an internal pressure equalization type expansion valve.
  • the second expansion valve 0 1 4 uses a valve module, not a solenoid valve, as compared with the expansion valve described in Japanese Patent Laid-Open No. 1 1 1 1 8 2 9 8 3. .. Therefore, the second expansion valve ⁇ 14 can be made smaller and quieter than the expansion valve described in Japanese Patent Laid-Open No. 11 _ 1 8 2 9 8 3.
  • the refrigerant circuit of the refrigeration cycle shown in Fig. 24 includes a compressor [3 ⁇ 4 1, a four-way valve [3 ⁇ 4 2, an outdoor heat exchanger 3, an expansion valve [3 ⁇ 4 4, an indoor heat exchanger [3 ⁇ 4 5, a pipe [3 ⁇ 4 6 ,
  • This refrigerant circuit may be mounted on a vehicle as a part of an air conditioner for a vehicle, or may be used as a part of an air conditioner other than the vehicle.
  • the outdoor heat exchanger 3 is arranged in the middle of the pipe 6, and is a heat exchanger that exchanges heat between the refrigerant flowing in from the pipe 6 and the outdoor air and causes the heat-exchanged refrigerant to flow out into the pipe 6. is there.
  • the term "outdoor” corresponds to "outside the vehicle compartment" when the refrigerant circuit is installed in a vehicle.
  • Expansion valve In the middle of the process, the refrigerant is placed between the outdoor heat exchanger 3 and the indoor heat exchanger 5 to decompress and expand the refrigerant.
  • the indoor heat exchanger 5 is arranged in the middle of the pipe 6, and is a heat exchanger that exchanges heat between the refrigerant flowing from the pipe 6 and the indoor air, and causes the heat-exchanged refrigerant to flow out to the pipe 86. is there.
  • the term "indoors” corresponds to the inside of a vehicle when this refrigerant circuit is installed in a vehicle.
  • the four-way valve 2 is connected to both ends of the pipe 6 and both ends of the pipe 7, and switches the direction of the refrigerant flowing through the cooling circuit to switch between the cooling circuit and the heating circuit. It is a device.
  • the four-way valve 2 may be arranged inside the vehicle.
  • Four-way valve 2 consists of cylinder 21, first piston 22 and second piston.
  • first valve module Eight and the second valve module X are explained.
  • the configuration of the first valve module X8 and the configuration of the second valve module X are the same except for the connection destination.
  • each of the first valve module 18 and the second valve module X has the configuration shown in FIG.
  • the configuration of the first valve module X8 and the configuration of the second valve module XM are the same except for the connection destination.
  • a second valve module X seen as a first path 'Lube module X eight, described valve module ⁇ 0.
  • valve module 0 the configuration of the valve module 0 will be described with reference to FIGS. 25, 26, 27, 28, 29 and 30.
  • the valve module ⁇ includes a micro valve 1, a valve casing 2, a sealing member 3, three ⁇ rings 4, 4, 5 3, V 5 b, It has two electrical wirings (6), (7) and a conversion 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.
  • 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 But not limited to this ⁇ 2020/175 549 29 ⁇ (:171? 2020 /007725
  • the micro valve 1 functions as a pilot valve.
  • the electrical wiring 6 and 7 extend from the two plate surfaces on the front and back of the micro valve 1 and the surface opposite to the valve casing 2 and extend to the sealing member 3 and the valve. It passes through the inside of the casing 2 and is connected to the power supply outside the valve module 0. As a result, the electric power is supplied from the power supply to the micro valve 1 through the electric wiring 6 and 7.
  • 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 side of the two plate surfaces on the front and back of the conversion plate 8 is fixed to the microvalve 1 with an adhesive, and the other side is fixed to the valve casing X 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.
  • These 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. is there.
  • the flow passages 81, 82, and 83 pass from one of the two plate surfaces on the front and back of the conversion plate 8 to the other.
  • the valve casing 2 is a resin casing that houses the micro valve 1 and the conversion plate 8.
  • the valve casing X 2 is formed by resin molding with polyphenylene sulfide as a main component.
  • 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 cylinder (21) and the micro valve (1) so that the micro valve (1) and the conversion plate (8) do not directly contact the cylinder (21). And one side of this bottom wall is the cylinder 2 1 is contacted and fixed, and the other side surface is contacted and fixed to the conversion plate 8. ⁇ 2020/175 549 30 ⁇ (:171? 2020 /007725
  • the valve casing 2 can absorb the difference in linear expansion coefficient between the microvalve 1 and the cylinder 21. This is because 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 cylinder 21.
  • the linear expansion coefficient of the conversion plate 8 is a value between the linear expansion coefficient of the microvalve 1 and the linear expansion coefficient of the valve casing 2.
  • 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 the 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 protrusion 2 1, the second protrusion 2 2 and the third protrusion 2 3 are cylinders.
  • the first protruding portion 21 is formed with a first communication hole V 1 which penetrates from the end on the side of the microvalve 1 to the end on the opposite side.
  • the second protruding portion 22 is formed with a second communication hole V 2 that penetrates from the end on the side of the microvalve 1 to the end on the opposite side.
  • a third communicating hole (3) is formed in the third protruding portion (23) so as to penetrate from the end on the side of the microvalve (1) to the end on the opposite side.
  • the 1st communicating hole 1, 2nd communicating hole 2 and 3rd communicating hole V 3 are lined up in a row, and the 1st communicating hole is located between 2nd communicating hole V 2 and 3rd communicating hole V 3.
  • the V1 is located.
  • the end of the first communication hole V1 on the side of the micro valve 1 is communicated with 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.
  • 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 opened other side of the valve casing 2. Of the two plate surfaces on the front and back of the microvalve 1, the sealing member 3 covers the entire plate surface on the side opposite to the conversion plate 8 side. cover. In addition, the sealing member Y 3 covers a part of the two plate surfaces on the front and back of the conversion plate Y 8 on the side opposite to the bottom wall side of the valve casing Y 2. Further, the sealing member Y 3 covers the electric wirings Y 6 and Y 7 to realize waterproofing and insulation of the electric wirings Y 6 and Y 7. The sealing member Y 3 is formed by resin potting or the like.
  • Ring Y 4 is attached to the outer circumference of the first protrusion Y 21 and
  • the ring Y5a is attached to the outer periphery of the second protrusion Y22, and seals between the cylinder _R21 and the second protrusion Y22, so that the outside of the four-way valve R2 and the outside of the refrigerant circuit. Suppress the leakage of the refrigerant to the.
  • the ring Y 5 is attached to the outer circumference of the third protrusion Y 23 and seals between the cylinder -R 2 1 and the third protrusion Y 23, so that it is external to the four-way valve R 2 and is connected to the refrigerant circuit. Prevents leakage of refrigerant to the outside.
  • the microvalve Y 1 is a MEMS having a first outer layer Y 1 1, a middle layer Y 12 and a second outer layer Y 1 3, both of which are semiconductors.
  • ME MS is an abbreviation for Micro Electro Mechanical Systems.
  • the first outer layer Y11, the middle layer Y12, and the second outer layer Y13 are rectangular plate-shaped members that have the same outer shape, and are the first outer layer Y11, the middle layer Y12, and the first layer Y12. 2
  • the outer layers Y 1 3 are laminated in this order.
  • the middle layer Y 1 2 is sandwiched between the first outer layer Y 1 1 and the second outer layer Y 1 3 from both sides.
  • the second outer layer Y13 is arranged on the side closest to the bottom wall of the valve casing Y2.
  • the structures of the first outer layer Y 11 and the intermediate layer Y 12 and the second outer layer Y 13 which will be described later are formed by a semiconductor manufacturing process such as chemical etching.
  • the first outer layer Y 11 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 26, the first outer layer Y 1 1 is formed with two through holes Y 1 4 and Y 1 5 penetrating to the front and back. The ends of the electrical wirings Y 6 and Y 7 on the microvalve Y 1 side are inserted into the through holes Y 14 and Y 15 respectively. ⁇ 2020/175 549 32 ⁇ (:171? 2020 /007725
  • the second outer layer 13 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 26, FIG. 28, and FIG. 29, 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. 18 are formed.
  • the first coolant hole 16 and the second coolant hole 17 and the third coolant hole 18 are respectively the flow passages 8 1 and 8 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 hydraulic diameter of each of the first refrigerant hole 16 and the second refrigerant hole 17 and the third refrigerant hole 18 is And above 3 It is, but not limited to, the following.
  • 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 fixing part 1 2 1, the second fixing 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 1 2 1 is a member fixed to the first outer layer 1 1 2 and the second outer layer 1 3 1.
  • 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 28 are formed so as to surround the same one refrigerant chamber 19.
  • the refrigerant 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 first fixed part 1 2 1, the first outer layer 1 1 and the second outer layer 1 3 correspond to the base as a whole.
  • the electric wirings 6 and 7 are electric wirings for changing and changing the temperatures of the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4.
  • the second fixed portion 112 is fixed to the first outer layer 11 and the second outer layer 13 respectively.
  • 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 123 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 123 is connected to the first fixed portion 1 21 at one end in the longitudinal direction and is connected to the spine 125 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 125 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. ⁇ 2020/175 549 34 ⁇ (:171? 2020 /007725
  • Each of the second ribs 124 is connected to the second fixing portion 122 at one end in the longitudinal direction and is connected to the spine 125 at the other end.
  • the second ribs 1 24 are offset toward the beam 1 27 side in the longitudinal direction of the spine 1 25 as the second fixing part 1 22 side approaches the spine 1 25 side. , Is skewed to the spine 1 25. Then, the plurality of second ribs 124 extend parallel to each other.
  • the arm arm 126 has an elongated rod shape that extends non-orthogonally and parallel to the spine arm 125. One end of the arm 1 26 in the longitudinal direction is connected to the beam 1 27, and the other end is connected to the first fixed portion 1 2 1.
  • the beam 127 has an elongated rod shape extending in a direction intersecting the spine 125 and the arm 126 at about 90°. One end of the beam 1 27 is connected to the movable portion 1 28. The arm 1 26 and the beam 1 27 as a whole correspond to the amplification section.
  • connection position 2 of 1 27, the connection position 3 of the beam 1 27 and the movable part 1 28 are arranged in this order along the longitudinal direction of the beam 1 27.
  • connection point between the first fixed part 1 2 1 and the arm 1 26 is the hinge 0
  • the area from the hinge 0 to the connection position 2 in the plane parallel to the plate surface of the intermediate layer 1 2 is assumed.
  • the straight line distance from hinge 0 to connection position 3 is longer than the straight line distance.
  • 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 outer shape of the movable portion 128 has a rectangular shape that extends in a direction approximately 90° with respect to the longitudinal direction of the beam 127.
  • the movable portion 128 can move integrally with the beam 1 27 in the refrigerant chamber 19.
  • the movable portion 128 has a frame shape that surrounds the through hole 112 that penetrates the front and back of the intermediate layer 12. ⁇ 2020/175 549 35 ⁇ (: 171? 2020 /007725
  • the through hole 1208 also moves integrally with the movable portion 1208.
  • the through hole 112 is a part of the refrigerant 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 portion connected to the plurality of 1st rib 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 electrical wiring 7 passing through the through hole 1 5 of the 1st outer layer 11 shown in Fig. 26 is shown.
  • 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.
  • the connection position 2 corresponds to the bias position.
  • the members consisting of the beams 1 27 and the arms 1 26 change their postures integrally with the hinge 0 as the fulcrum and the connection position 2 as the power 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 side where you press. ⁇ 2020/175 549 36 ⁇ (:171? 2020 /007725
  • 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 electric wiring 6 and 7 are supplied to the micro valve 1 through the first application point 1 2 9 and the second application point 1 3 0.
  • the greater the electric power supplied the greater the amount of movement of the movable part 1 28 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 2 3 and the second rib 1 2 4 and the greater the degree of expansion.
  • 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. ⁇ 2020/175 549 37 ⁇ (:171? 2020 /007725
  • 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 120 is the first refrigerant hole 16 and the second refrigerant hole 16 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 movable part 128 can be moved to the non-energized position and the maximum energized position. It can be stopped at any intermediate position in between. For example, the maximum energized position and ⁇ 2020/175 549 38 ⁇ (:171? 2020 /007725
  • the power supplied to the micro valve 1 should be half the maximum value within the control range.
  • the duty ratio of ⁇ /1 ⁇ /1 control should be 50%.
  • the first refrigerant hole 1 6, the second refrigerant hole 1 7 and the third refrigerant hole 1 8 are all through holes 1 1 It communicates with 20.
  • the second refrigerant hole 17 and the third refrigerant hole 18 are not fully open with respect to the through hole 120, and the opening degree is less than 100% and greater than 0%. ..
  • the opening of the third refrigerant hole 18 with respect to the through hole 1 20 decreases, and the opening of the second refrigerant hole 17 increases. Will increase.
  • a high pressure acts on the second refrigerant hole 17 and a low pressure higher than the high pressure acts on the third refrigerant hole 18.
  • an intermediate pressure higher than the low pressure and lower than the high pressure acts on the outside of the micro valve 1 from the first refrigerant hole 16.
  • the value of the intermediate pressure fluctuates depending on the opening of the second refrigerant hole 17 and the opening of the third refrigerant hole 18 with respect to the movable portion 1 28.
  • the beam 1 2 7 and the arm 1 2 6 function as a lever with the hinge ⁇ as a fulcrum, the connection position 2 as the force point, and the connection position 3 as the action point. ..
  • the linear distance from the hinge 0 to the connecting position 3 is more than the linear distance from the hinge 0 to the connecting position 2 in the plane parallel to the plate surface of the intermediate layer 1 2. long. Therefore, the moving amount of the connecting position 3 which is the action point is larger than the moving amount of the connecting 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 the surface on one side of the micro valve 1, passes through the micro valve 1, and then passes through the micro valve 1. ⁇ 2020/175 549 39 ⁇ (:171? 2020 /007725
  • 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 microvalve 1 configured as described above can be easily miniaturized as compared with a solenoid valve.
  • the microvalve 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 miniaturization compared to an electromagnetic valve that does not use such a lever.
  • 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 power consumption for driving the movable portion 1 28 can be reduced. Further, since it is possible to eliminate impact noise when the solenoid valve is driven, noise can be reduced.
  • both the microvalve 1 and the valve module 0 have the refrigerant flow path of the II-turn structure, it is possible to reduce the digging of the cylinder 21. That is, the depth of the recess formed in the cylinder-1 for arranging the valve module can be suppressed. The reason is as follows.
  • the valve module 0 does not have a 1)-turned refrigerant flow path, the valve module 0 has a refrigerant inlet on the cylinder 21 side, and the valve module 0 is the opposite of the valve module 0. It is assumed that there is a refrigerant outlet on the side surface. In that case, it is necessary to form a refrigerant flow path on both sides of the valve module. Therefore, place the refrigerant passages on both sides of the valve module 0 in the cylinder 21. ⁇ 2020/175 549 40 ⁇ (:171? 2020 /007725
  • 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, downsizing of the four-way valve 2 can be realized.
  • the micro valve 1 is lightweight, it is a four-way valve. Is lightened. Since the power consumption of the micro valve 1 is small, the power consumption of the 4-way valve 2 is reduced.
  • the cylinder 21 is a tubular casing having a valve chamber V 0 formed therein. Corresponds to the cylinder 2 1 body.
  • the first piston [3 ⁇ 4 2 2, the second piston 23, the first connecting shaft [3 ⁇ 4 2 4, the second connecting shaft 25, and the valve disc [3 ⁇ 4 2 6 are accommodated in this valve chamber [3 ⁇ 4 0 ..
  • the first valve module X8 is fixed to one end of the cylinder 21 in the longitudinal direction (that is, the left-right direction in FIG. 24), and the second valve module X is fixed to the other end.
  • the flow path [8 1] communicates with the valve chamber [0] at one end and communicates with the first communication hole 1 of the first valve module X 8 at the other end.
  • the flow channel [8] communicates with the first high-pressure introduction flow channel [28] at one end, and communicates with the second communication hole 2 of the first valve module 8 at the other end.
  • the flow path [3] communicates with the first low-pressure introduction flow path [300] at one end and communicates with the third communication hole ⁇ 3 of the first valve module 8 at the other end. ⁇ 2020/175 549 41 ⁇ (:171? 2020 /007725
  • one opening 1 is formed on one side surface of the cylinder 21 (that is, the upper surface of FIG. 24), and the opening 1 is provided on the downstream side of the compressor 1 in the pipe 7. The ends are connected. As a result, the downstream side of the compressor 81 in the pipe 7 and the valve chamber ⁇ communicate with each other through this opening.
  • the opening closest to the first valve module X8 [[3] is connected to the end of the pipe 6 on the indoor heat exchanger 5 side.
  • the opening closest to the second valve module X 4 is connected to the end of the pipe 6 on the outdoor heat exchanger 3 side.
  • the first piston 22 is It is a movable wall.
  • the first piston 22 prevents the refrigerant from leaking between the valve chamber [3 ⁇ 4 0 and the first pressure chamber [3 ⁇ 4 1 and other portions. 1st pressure
  • the second piston 23 It is a movable wall. With this second piston 23, the valve chamber [2 Refrigerant leakage between the 2 and other parts is prevented.
  • the second pressure chamber V 2 is a portion of the valve chamber V 0 that is closest to the second valve module X side, and is always in communication with the above-mentioned one end of the flow passage [3 ⁇ 4 1.
  • the first connecting shaft 24 is a rod-shaped movable member extending in the longitudinal direction of the cylinder 21.
  • the first connecting shaft 24 is fixed to the first pressure chamber [3 ⁇ 4 1 at the end of the first valve module X 8 in the longitudinal direction and is fixed to the valve body 26 at the end of the second valve module X ⁇ side.
  • the second connecting shaft 25 is a rod-shaped movable member extending in the longitudinal direction of the cylinder 21.
  • the second connecting shaft 25 is fixed to the second pressure chamber V 2 at the second valve module X side end in the longitudinal direction, and is fixed to the valve body 26 at the first valve module X eight side end.
  • the valve body 26 is It is a movable dome-shaped wall that separates and other parts.
  • the valve body 26 prevents the refrigerant from leaking between the valve chamber [
  • First communication chamber [3 ⁇ 4 3 is always in communication with the upstream end of the compressor 1 in the pipe 7.
  • the valve body 26 is displaced in the valve chamber [3 ⁇ 4 0 to switch the communication and cutoff between the first port and the second port through the valve chamber [3 ⁇ 4 0 to control the flow rate of the refrigerant. It is a valve body that adjusts. Opening 1 and opening 3 correspond to the first and second ports, respectively. Also, opening 1 and opening
  • opening 3 and opening 2 correspond to the first port and the second port, respectively.
  • opening 2 correspond to the first and second ports, respectively.
  • second low-pressure introduction flow channel [3 ⁇ 4 3 1 is a pipe arranged outside the cylinder 21;
  • the first high-pressure introduction flow channel [28] has one end communicating with the downstream side of the compressor 1 in the pipe 7 and the other end communicating with the flow channel [82].
  • the second high-pressure introduction flow path [3 ⁇ 4 29 has one end communicating with the downstream side of the compressor 1 in the pipe 7 and the other end communicating with the flow path [3 ⁇ 4 2].
  • One end of the first low-pressure introduction flow path [30] communicates with the upstream side of the compressor in the pipe 7, and the other end communicates with the flow path [3 ⁇ 4 3.
  • Second low-pressure introduction flow path [3 ⁇ 4 3 1 has one end communicating with the upstream side of the compressor 1 in the pipe 7 and the other end with the flow path.
  • Each of the 1 low-pressure introduction flow path [3 ⁇ 4 30 and the second low-pressure introduction flow path [3 ⁇ 4 3 1 is always in communication with the pipe 7 located outside the four-way valve 2. Therefore, the first high-pressure introduction flow path [3 ⁇ 4 28, ⁇ 2020/175 549 44 ⁇ (:171? 2020 /007725
  • Each of the second high-pressure introduction flow path [3 ⁇ 429, the first low-pressure introduction flow path [3 ⁇ 430, and the second low-pressure introduction flow path [3 ⁇ 431] corresponds to an external communication passage.
  • the first valve module X8 in the first valve module X8, as shown in Figs. 28 and 29, the first valve module X8 is stopped at the non-energized position. Therefore, in the first valve module X8, the first refrigerant hole 16 communicates with the flow path [3 ⁇ 41, the second refrigerant hole 17 is blocked from the flow path 2, and the third refrigerant hole 1 8 communicates with channel 3. Then, in the first valve module X8, the low pressure on the upstream side of the compressor 1 in the pipe 7 passes through the refrigerant in the first low pressure introduction flow passage 30, the flow passage 3, and the third communication hole 3. And acts on the third refrigerant hole 18 as shown by the arrow in FIG.
  • this low pressure acts on the first pressure chamber [3 ⁇ 4 1 via the refrigerant in the third refrigerant hole 18, the through hole 1 20, the first refrigerant hole 16 and the flow path [3 ⁇ 4 1]. ..
  • the first pressure chamber The pressure of the refrigerant of 1 becomes the same pressure as the low pressure refrigerant of the upstream side of the compressor 1 in the pipe 7.
  • the second refrigerant hole 17 communicates with the flow channel [3, and the third refrigerant hole 18 is blocked from the flow channel 3. Then, in the second valve module X, as shown by the arrow in FIG. 31, the high pressure on the downstream side of the compressor 1 in the pipe 7 is determined by the second high pressure inlet flow passage [3 ⁇ 429, flow passage [3 ⁇ 4 2. It acts on the second refrigerant hole 17 through the refrigerant in the second communication hole 2. Further, this high-pressure refrigerant is transferred to the second pressure chamber through the second refrigerant hole 17, the through hole 120, the first refrigerant hole 16 and the flow passage [refrigerant in the tank 1]. The pressure of the refrigerant of 2 is It has the same pressure as the high-pressure refrigerant on the downstream side of compressor 1 in 7.
  • the end of the pipe on the side of the indoor heat exchanger 85 and the end of the pipe 7 on the upstream side of the compressor 1 communicate with each other via the first communication chamber [3. Furthermore, at this time, the end of the pipe 6 on the outdoor heat exchanger 3 side communicates with the end of the pipe 7 on the downstream side of the compressor 1.
  • the high-pressure vapor-phase refrigerant compressed and discharged by the compressor 1 is It flows through the pipe 6 in this order and flows into the outdoor heat exchanger 8 3.
  • the refrigerant flowing into the outdoor heat exchanger 3 exchanges heat with the outdoor air to be cooled and condensed.
  • the cooling medium condensed in the outdoor heat exchanger 3 is decompressed by the expansion valve 84 and then flows into the indoor heat exchanger 5.
  • the refrigerant flowing into the indoor heat exchanger 5 exchanges heat with the indoor air to remove heat from the air and evaporate.
  • the low-pressure vapor-phase refrigerant evaporated in the indoor heat exchanger 5 is drawn into the compressor 1 through the distribution pipe 86, the first communication chamber [3 ⁇ 4 3, and the pipe 7 in this order. By such an operation, the air in the room is cooled. That is, cooling operation is realized. ⁇ 2020/175 549 46 ⁇ (:171? 2020 /007725
  • the high pressure on the downstream side of the compressor in the pipe 7 acts on the second refrigerant hole 17 and the low pressure on the upstream side of the compressor 1 in the pipe 7. Acts on the third refrigerant hole 18.
  • the intermediate pressure between the high pressure acting on the second refrigerant hole 17 and the low pressure acting on the third refrigerant hole 18 is the through hole 1 20, the first refrigerant hole 16 and the flow path.
  • the magnitude of the intermediate pressure increases as the value obtained by dividing the opening of the second refrigerant hole 17 with respect to the through hole 120 by the opening of the third refrigerant hole 18 is larger.
  • This intermediate pressure in the first pressure chamber V 1 is If the pressure is lower than that in 2 and, as a result, the valve body 26 is in the position shown in Fig. 24, the above cooling operation is realized.
  • the electric power supplied from the electric wiring lines 6 and 7 to the micro valve 1 in the second valve module X may be smaller than the maximum electric power within the control range. In that case, in the second valve module X, it will be in a state of being stopped at the above-mentioned intermediate position. Therefore, in the second valve module, the first refrigerant hole 16 communicates with the flow passage [3 ⁇ 4m 1, the second coolant hole 17 communicates with the flow passage [3 ⁇ 4 2 and the 3rd The coolant hole 18 communicates with the flow path [3 ⁇ 43.
  • the intermediate pressure between the high pressure acting on the second refrigerant hole 17 and the low pressure acting on the third refrigerant hole 18 is the through hole 1 20, the first refrigerant hole 16 and the flow path.
  • the second The pressure of the refrigerant of 2 becomes the intermediate pressure.
  • the magnitude of this intermediate pressure becomes larger as the value obtained by dividing the opening of the second refrigerant hole 17 with respect to the through hole 120 by the opening of the third cooling hole 18 is larger.
  • the pressure in the first pressure chamber [3 ⁇ 4 1 is an intermediate pressure, If the pressure of is also intermediate pressure, the former intermediate pressure is lower than the latter intermediate pressure, and as a result, if the valve body 26 is in the position shown in Fig. 24, the above cooling operation is realized.
  • the heating operation will be described.
  • the maximum electric power within the control range is supplied from the electrical wirings 6 and 7 of the first valve module X8 to the micro valve 1 of the first valve module 8.
  • the duty ratio of ⁇ /1 ⁇ /1 control is 100%.
  • the electric power is not supplied to the microvalve 1 of the second valve module X from the electric wiring 6 and 7 of the second valve module. That is, the duty ratio of ⁇ /1 ⁇ /1 control is 0%.
  • the first valve module 8 is in the state of being stopped at the maximum energization position as shown in Figs. 30 and 31. Therefore, in the first valve module 8, the first refrigerant hole 16 communicates with the flow path [3 ⁇ 4 1 and the second cooling hole hole 17 communicates with the flow path [3 ⁇ 4 2 and the third refrigerant hole The hole 18 is blocked from the flow path 3. Then, in the first valve module 8, as shown by the arrow in FIG. 31, the high pressure on the downstream side of the compressor 1 in the pipe 7 is the first high pressure introduction flow passage [3 ⁇ 4 28, flow passage [3 ⁇ 4 2, acting on the second refrigerant hole 17 through the refrigerant in the second communication hole 2. In addition, this high-pressure refrigerant is the second refrigerant hole 17 and the through hole. ⁇ 2020/175 549 48 ⁇ (: 171? 2020 /007725
  • the second pressure chamber The pressure of the refrigerant in 2 is It has the same pressure as the high-pressure refrigerant on the downstream side of compressor 1 in 7.
  • the second valve module X in a state of being stopped at the non-energized position. Therefore, in the second valve module X, the first refrigerant hole 16 is communicated with the flow path [3 ⁇ 41, the second refrigerant hole 17 is blocked from the flow path 2, and the third refrigerant hole 1 8 communicates with flow path 3. Then, in the second valve module X, the low pressure on the upstream side of the compressor 1 in the pipe 7 becomes the second low pressure introduction flow path [3 ⁇ 4 3 1, the flow path [3 ⁇ 4 3, the third communication hole 3]. And acts on the third refrigerant hole 18 via.
  • this low pressure is due to the third refrigerant hole 18, the through hole 120, the first refrigerant hole 16 and the flow passage [the first pressure chamber through the refrigerant in the tank 1]. It is acted on by refrigerant 1. As a result, the pressure in the first pressure chamber V 1 becomes the same as that of the low pressure refrigerant on the upstream side of the compressor 1 in the pipe 7.
  • the high-pressure vapor-phase refrigerant compressed by the compressor 1 and discharged is It flows through the pipe 6 in this order and flows into the indoor heat exchanger 85.
  • the refrigerant flowing into the indoor heat exchanger 5 exchanges heat with the indoor air to warm the indoor air and condense it.
  • the refrigerant condensed in 5 is decompressed by the expansion valve 4 and then flows into the outdoor heat exchanger 3.
  • the refrigerant flowing into the outdoor heat exchanger 83 exchanges heat with the outdoor air to remove heat from the air and evaporate.
  • the low-pressure vapor-phase refrigerant evaporated in the outdoor heat exchanger 3 is sucked into the compressor through the pipe [3 ⁇ 4 6, the first communication chamber [3 ⁇ 4 3, and pipe 7 in this order. Such operation warms the indoor air. That is, heating operation is realized.
  • the electric power supplied from the electric wiring lines 6 and 7 to the micro valve 1 in the first valve module 8 may be smaller than the maximum electric power within the control range. ..
  • the intermediate pressure between the high pressure acting on the second refrigerant hole 17 and the low pressure acting on the third refrigerant hole 18 is the through hole 120, the first refrigerant hole 16 and the flow. It acts on the first pressure chamber [3 ⁇ 4 1 via the refrigerant in the path [3 ⁇ 4 1]. Therefore, the first pressure chamber The pressure of the refrigerant of 1 becomes the intermediate pressure. This , If the valve 26 is in the position shown in Fig. 32 as a result, the heating operation described above is realized.
  • the pressure of the medium becomes the intermediate pressure.
  • the second pressure chamber If the intermediate pressure in 2 is lower than the pressure in the first pressure chamber V 1 and, as a result, the valve body 26 is in the position shown in FIG. 32, the above heating operation is realized.
  • the pressure in the first pressure chamber [3 ⁇ 4 1 is an intermediate pressure
  • the pressure of is also intermediate pressure
  • the former intermediate pressure is higher than the latter intermediate pressure, and as a result, if the valve body 26 is in the position shown in Fig. 32, the above heating operation is realized.
  • the four-way valve 2 is the four-way valve described in Japanese Patent Laid-Open No. 1 1 _ 2 8 7 6 3 5 2. ⁇ 2020/175 549 50 ⁇ (:171? 2020 /007725
  • the valve module 0 is used instead of the solenoid valve. Therefore, the four-way valve 2 can be made smaller and quieter than the four-way valve described in Japanese Patent Laid-Open No. 11-2 8 7 6 3 5 2.
  • the present embodiment is modified from the refrigerant circuit of the third embodiment so that the compressor 1 is configured integrally with the four-way valve 2. For this reason, the pipe 7 of the third embodiment is abolished.
  • Four-way valve 82 of the present embodiment outdoor heat exchanger 3, expansion valve [3 ⁇ 4 4, indoor heat exchanger
  • the compressor 1 has a housing 3 11 made of a metallic material.
  • a compression mechanism 3 15 for compressing the refrigerant and an electric motor 3 16 which is a drive source of the compression mechanism 3 15 are housed in the housing 3 11.
  • a shaft support member 3 17 is fixed near the opening of the housing 3 11.
  • a shed hole 3 17 7 is formed at the center of the shaft support member 3 17.
  • the shaft support member 3 17 and the housing 3 11 define a motor room 3 1 2 3 in which the electric motor 3 16 is housed.
  • the rotating shaft 3 18 is housed in the housing 3 11.
  • One end side of the rotary shaft 3 18 (that is, the opening side of the housing 3 11) is passed through the shed hole 3 17 of the shaft support member 3 17 and at the same time through the bearing 3 sp 1. It is rotatably supported by the shaft support member 3 17.
  • the other end of the rotary shaft 3 18 is rotatably supported by the housing 3 11.
  • the electric motor 3 16 includes an inlet motor 3 1 6 3 that rotates integrally with the rotary shaft 3 18 and an intake housing structure 3 1 2 that surrounds the inlet motor 3 1 6 3. It is composed of a stator 1613 fixed to the peripheral surface. The electric motor 3 16 operates by being supplied with power from the inverter 3 25.
  • the compression mechanism 3 15 is composed of a fixed scroll 3 20 and an orbiting scroll 3 21.
  • the fixed scroll 320 is composed of a fixed base plate 3203 having a disk shape, and a fixed spiral wall 320 provided upright from the fixed base plate 3203.
  • the orbiting scroll 3 2 1 is a disc-shaped orbiting substrate 3 2 1 3 ⁇ 2020/175 549 51 ⁇ (:171? 2020 /007725
  • An eccentric shaft 3 1 8 3 is projectingly provided on one end surface of the rotary shaft 3 18 at a position eccentric to the rotary axis 3 !_ of the rotary shaft 3 18.
  • a bush 318 is attached to and fixed to the eccentric shaft 318.
  • a swivel substrate 3 2 1 3 is supported on the bush 3 18 via a bearing 3 to 3 so as to be rotatable relative to the bush 3 18.
  • the fixed swirl wall 3 20 and the swirl swirl wall 3 2 1 are entwined with each other.
  • the tip surface of the fixed spiral wall 3 2 0 spoon is in contact with the swivel base 3 2 1 3
  • the distal end surface of the orbiting scroll wall 3 2 1 spoon is in contact with the fixed substrate 3 2 0 3.
  • the compression chamber 3 2 2 is defined by the fixed substrate 320 3 and the fixed swirl wall 320, and the swirl substrate 3 2 and the swirl swirl wall 3 21.
  • a rotation preventing mechanism (not shown) that prevents the time point of the orbiting scroll 3 21.
  • a discharge port 206 is formed in the center of the fixed substrate 320.
  • a discharge valve 320 V is attached to the fixed substrate 320 so as to cover the discharge port 320.
  • the discharge port 3 2 0 6, the four-way valve Communicate with.
  • the cylinder 21 of the four-way valve 2 of this embodiment has a shape in which the fixed scroll 320 side of the second communication chamber [3 ⁇ 4 4 is open.
  • the cylinder 21 and the fixed scroll 320 have a suction passage 3 1
  • the suction passage 3 1 2 II is located on the outer peripheral side of the compression chamber 3 2 2 and the first communication chamber of the four-way valve 2. Always in communication with 3. In addition, the suction passage 3 12 is connected to the first pressure chamber [3 ⁇ 4 1, There is no communication with any of the above.
  • the first high-pressure introduction channel 28 of the four-way valve 2 is It is formed within, communicating with the second communication hole ⁇ 2 of the first valve module say yes eight at one end, communicates with the discharge port 3 2 0 6 at the other end via a flow path (not shown).
  • the second high-pressure introduction flow path [3 ⁇ 429 is formed in the cylinder 21 and ⁇ 2020/175 549 52 ⁇ (:171? 2020 /007725
  • Second communication with the second communication Ana ⁇ second valve module ⁇ communicates with the discharge port 3 2 0 6 at the other end via a flow path (not shown). Therefore, the high-pressure refrigerant flows into the first high-pressure introduction flow path [3 ⁇ 4 2 8 and the second high-pressure introduction flow path [3 ⁇ 4 29 after being compressed by the compressor 1 and downstream of the compressor 81].
  • the flow path (not shown) is a cylinder. It is formed inside and inside the fixed substrate 320.
  • the first low-pressure introduction flow path 30 is formed in the cylinder 21 and communicates with the third communication hole 3 of the first valve module 8 at one end, and a flow path (not shown) is formed. The other end communicates with the suction passage 3 1 2.
  • the second low-pressure introduction flow path [3 ⁇ 4 3 1 is formed in the cylinder 21 and communicates with the third communication hole 3 of the second valve module X at one end and through a flow path (not shown) to the other. The end communicates with the suction passage 3 1 2 1 ⁇ .
  • the low-pressure refrigerant flows into and acts on the first low-pressure introduction flow path [3 ⁇ 4 30 and the second low-pressure introduction flow path [3 ⁇ 4 3 1 before the compressor 1 compresses it, upstream of the compressor 1.
  • the suction passage 3 1 2 II communicates with the compressor 1 outside the four-way valve 2
  • both the first low pressure introduction flow path [3 ⁇ 4 30 and the second low pressure introduction flow path [3 ⁇ 4 3 1 correspond to the external communication hole].
  • the flow path (not shown) is formed in the cylinder.
  • the refrigerant in the compression chamber 3 2 2 is being compressed by the orbiting scroll 3 21 while it is being compressed, and pushes the discharge valve 3 20 V from the discharge port 3 20 to push it out as a high pressure refrigerant in the second communication chamber. It is discharged to 4.
  • the method of energizing the microvalve 1 and the microvalve 1 of the second valve module X and the movement of the valve disc 26 are the same as in the third embodiment. Its to the flow of the refrigerant in the cooling operation and heating operation, the downstream pressure compressor 1 in the pipe 7 and the outlet 3 2 0 6 replaced, and the suction passage 3 1 2 II upstream of the compressor 1 in the pipe 7
  • the third embodiment is the same as the third embodiment except that it is replaced. Therefore, the present embodiment can achieve the same effect as that of the third embodiment.
  • the first path 'Lube module say yes eight
  • second valve module X Snake compressor
  • the refrigeration cycle can be miniaturized by integrating and.
  • the compressor 81 and the four-way valve Since the and can be integrally configured, the refrigeration cycle can be downsized. Moreover, since the pipe 7 can be eliminated, the refrigeration cycle can be easily downsized. Further, since the size of the two-way valve is small and the piping is simple, the refrigeration cycle of the present embodiment is useful in a system for switching the heating/cooling mode by the refrigerant piping, such as a room air conditioner. In particular, as in Japanese Patent Application No. 2 0 1 8-7 1 8 7 1, there is a small size refrigerator with a refrigeration cycle, blower fan, heater core, air conditioning casing, inside/outside air switching door, and air mix door. When the refrigeration cycle of this embodiment is applied to the air conditioning unit, the effect of downsizing is great.
  • 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. 34 and 35, 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 35.
  • 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. That is, ⁇ 2020/175 549 54 ⁇ (: 171? 2020 /007725
  • the failure detection unit X 50 is a semiconductor piezoresistive strain sensor.
  • the failure detection unit X 50 may be connected to the arm X 1 26 via an electrically insulating film so as not to be electrically connected to the arm X I 26.
  • Wirings X 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 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 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 control device X 5 5 outside the micro valve X 1.
  • the control device X 55 may be, for example, an air conditioner (3 II that controls the operation of the compressor, the blower, the air mix door, the inside/outside air switching door, etc. in the vehicle air conditioner.
  • the control device 55 may be a meter unit 11 for displaying the vehicle speed, the amount of remaining fuel, the amount of remaining battery, etc. in the vehicle.
  • the controller X 5 5 obtains the voltage signal corresponding to the amount of distortion of the arm X 1 2 6 via the wirings X 5 3 and X 5 4, the controller X 55 responds to the voltage signal. , Detects the presence or absence of failure of micro valve X 1. Faults to be detected include, for example, a fault in which the arm X 1 26 is broken, and a small foreign matter is caught between the movable part X 1 28 and the first outer layer X 1 1 or the second outer layer XI 3. Part X 1 2 8 is stuck, etc.
  • the arm XI 2 6 When the beams X 1 2 7 and the movable portion XI 2 8 are displaced according to the expansion and contraction of the multiple first ribs X 1 2 3 and the multiple second ribs X 1 2 4, the arm XI 2 6 The amount of distortion changes. Therefore, the position of the movable part X 1 28 can be estimated from the voltage signal according to the amount of distortion of the arm X 1 26.
  • the micro valve X 1 is ⁇ 2020/175 549 55 ⁇ (:171? 2020 /007725
  • This energization amount is a control amount for controlling the micro valve X 1.
  • the control device 55 uses this fact to detect the presence/absence of a failure of the microvalve X1. That is, the control device X 55 calculates the position of the movable part X 1 28 from the voltage signals from the wirings 5 3 and X 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. The first map and the second map are recorded in the non-volatile memory of the controller X 55. Non-volatile memory is a non-transitional tangible storage medium.
  • the control device 55 compares the calculated electric power with the electric power actually supplied to the microvalve X 1 from the electric wiring X 6 and X 7. Then, if the absolute value of the difference between the former power and the latter power exceeds the allowable value, the control device 55 determines that the microvalve X 1 has failed, and if it does not exceed the allowable value. , Determine that the microvalve X 1 is normal. Then, when the control device 55 determines that the microvalve X 1 is out of order, the control device 55 performs predetermined failure notification control.
  • the control device X 55 activates the notification device X 5 6 that notifies the person in the vehicle. For example, the controller 55 may turn on a warning lamp. Further, the control device 55 may cause the image display device to display an image indicating that a failure has occurred in the micro valve X 1. This allows vehicle occupants to be aware of the failure of microvalve X 1.
  • control device X 55 may record information indicating that a failure has occurred in the microvalve X I in a storage device in the vehicle.
  • This storage device is a non-transitional tangible storage medium. This allows the Microvalve X 1 failure to be recorded.
  • control device 55 determines that the microvalve X1 is out of order. ⁇ 2020/175 549 56 ⁇ (:171? 2020 /007725
  • energization stop control is performed.
  • the controller X 5 5 de-energizes the micro valve X 1 from the electrical wiring 6, X 7. In this way, by stopping the energization of the microvalve X 1 when the microvalve X 1 fails, it is possible to enhance the safety when the microvalve X 1 fails.
  • the failure detection unit X50 outputs the voltage signal for determining whether or not the microvalve X1 is operating normally, so that the control unit can control the microvalve X1. It is possible to easily determine whether or not there is 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 control device can determine whether or not the microvalve X I is defective, based on the change in the capacitance between the plurality of electrodes.
  • the micro valve 1 in each of the first valve module X8 and the second valve module X 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. 36 and 37, in addition to the same configuration as the third and fourth embodiments.
  • the failure detection unit 50 includes a pledge circuit formed in the arm 1 26 of the intermediate layer 1 2.
  • the bridge circuit contains four gauge resistors connected as shown in Figure 37.
  • the failure detection unit 50 is a diaphragm equivalent to the diaphragm. ⁇ 2020/175 549 57 ⁇ (:171? 2020/007725
  • 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 diagonally opposite input terminals 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 two diagonally opposite output terminals 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 control device 5 5 outside the micro valve X 1.
  • This control device 55 may be, for example, an air conditioner (3 II that controls the operation of the compressor, the blower, the air mix door, the inside/outside air switching door, etc. in the vehicle air conditioner.
  • the control device 55 may be a meter unit 11 that displays the vehicle speed, the amount of remaining fuel, the amount of remaining battery, etc. in the vehicle.
  • control device 5 5 obtains the voltage signal according to the distortion amount of the arm 1 2 6 via the wiring 5 3 and the device 5 4, the control device 5 5 responds to the voltage signal. , Detect the presence or absence of failure of micro valve 1. Failures to be detected include, for example, failures in which the arm 1 2 6 breaks, and minute foreign matter is caught between the moving part 1 2 8 and the first outer layer 1 1 or the second outer layer 1 3. There is a malfunction such as the moving part 1 2 8 getting stuck.
  • 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 control device 55 utilizes this fact to detect the presence/absence of a failure of the microvalve 1. That is, the 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 first map determined in advance. Then, based on the predetermined second map, 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 micro valve 1 Calculate the power supply. These 1st map and 2nd map are recorded in the non-volatile memory of the controller 55.
  • Non-volatile memory is a non-transitional tangible storage medium.
  • the 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 control device 55 determines that the microvalve 1 has failed, and if it does not exceed the allowable value. , It is judged that the micro valve 1 is normal. Then, when the control device 55 determines that the microvalve 1 is out of order, it performs predetermined failure notification control.
  • the control device 5 5 operates the notification device 5 6 that notifies the person in the vehicle.
  • the control device 55 may turn on a warning lamp.
  • the control device 55 may cause the image display device to display an image indicating that a failure has occurred in the micro valve 1. This allows the vehicle occupant to notice the failure of the microvalve 1.
  • 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 Micro Valve 1 to be recorded. ⁇ 2020/175 549 59 ⁇ (:171? 2020 /007725
  • control device 55 determines that the microvalve 1 is out of order
  • the control device 55 controls energization stop.
  • the control device 5 5 stops the 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 or not the microvalve 1 is operating normally, so that the control unit can control the microvalve 1 It is possible to easily determine whether or not there is a failure.
  • 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 based on 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 control device 55 can determine whether or not the microvalve 1 is out of order, based on the change in the capacitance between the plurality of electrodes.
  • the present disclosure is not limited to the above-described embodiments, and can be modified as appropriate. Further, the above embodiments are not unrelated to each other, and can be appropriately combined unless a combination is obviously impossible. Further, in each of the above-described embodiments, the constituent elements of the embodiment are not necessarily essential, except when it is clearly indicated that they are essential, or when they are considered to be obviously essential in principle. In addition, in each of the above-described embodiments, when numerical values such as the number, numerical value, amount, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly essential. ⁇ 2020/175 549 60 ⁇ (:171? 2020 /007725
  • the vehicle's external environment information for example, the humidity outside the vehicle
  • the sensor is abolished, and the external environment from the server or cloud outside the vehicle is removed. It is also possible to receive information.
  • a plurality of values are exemplified for a certain amount, it is possible to adopt a value between the plurality of values unless otherwise specified or when it is obviously impossible in principle.
  • the plurality of first ribs X 1 23, the plurality of second ribs X 1 2 4, the plurality of first ribs 1 2 3 and the plurality of second ribs 1 2 4 are When it is energized, it generates heat, and its heat rises, causing it to expand.
  • these members may be made of a shape memory material whose length changes as the temperature changes.
  • the microvalve X 1 is closed when the electrical connection from the electrical wiring 6, X 7 to the microvalve X 1 is stopped.
  • this does not have to be the case.
  • the micro valve X1 is opened. ⁇ 2020/175 549 61 ⁇ (:171? 2020/007725
  • valve modules In the third and fourth embodiments, two or more valve modules are used, but three or more may be used.
  • the first expansion valve 0 13 used for air conditioning on the front seat side may have the same structure as the second expansion valve 0 14 used for air conditioning on the rear seat side.
  • the shape and size of the microvalve X 1 are not limited to those shown in the above embodiment.
  • the micro valve XI has a first refrigerant hole X 16 and a second cooling hole X 17 that have a hydraulic diameter that can control extremely minute flow rate and that does not clog the minute dust existing in the flow path. All you have to do is do it.
  • the shape and size of the microvalve 1 are not limited to those shown in the above embodiment.
  • the microvalve 1 is capable of controlling a very small flow rate, and has a hydraulic diameter of 1st refrigerant hole 16 and 2nd cooling medium hole 17 which prevent hydraulic dust from clogging the flow path. It suffices if the third refrigerant hole 18 is provided.
  • the valve device used in the refrigeration cycle includes a first port, a second port, and the first port to the second port.
  • valve part for changing the pressure, wherein the valve part has a refrigerant chamber in which a refrigerant flows, a first refrigerant hole communicating with the cooling medium chamber, and a second refrigerant hole communicating with the refrigerant chamber.
  • a base part, a drive part that is displaced when the temperature of the drive part changes, an amplification part that amplifies a displacement caused by a change in the temperature of the drive part, and the displacement amplified by the amplification part is transmitted to the refrigerant chamber.
  • a movable part that adjusts the flow rate of the refrigerant between the first cooling medium hole and the second cooling medium hole through the cooling medium chamber.
  • the amplifying portion biases the movable portion, and the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position, and the first refrigerant hole and the second refrigerant hole are One of them communicates with the external communication passage, and the other communicates with the valve chamber.
  • the base portion has a plate-shaped first outer layer, a plate-shaped second outer layer, and a fixing portion sandwiched by the first outer layer and the second outer layer, the first outer layer, the temperature of the drive unit.
  • a hole through which an electric wire for changing the temperature is passed is formed, and the first refrigerant hole and the second refrigerant hole are formed in the second outer layer.
  • the valve component has the II-turn structure in which the first refrigerant hole and the second refrigerant hole are formed in the same first outer layer, and further, the electric wiring is formed in the second outer layer on the opposite side. A hole is formed to pass through. Therefore, the electric wiring can be placed on the side closer to the atmosphere as compared with the flow paths of the refrigerant on the side of the first and second refrigerant holes. Therefore, the necessity of a hermetic sealing structure for reducing the influence of the refrigerant atmosphere on the electric wiring is reduced.
  • the valve component is a first valve component (1)
  • the external communication passage is a first external communication passage (8 28, [3 ⁇ 4 30).
  • the valve device includes a second external communication passage (8 29, [3 ⁇ 4 3]) communicating with a refrigerant flow path outside the valve device in the refrigeration cycle and the refrigerant between the valve chamber.
  • the second valve component (X 1, which changes the pressure for moving the valve body by adjusting the flow rate)
  • V 1 the second valve component is, in addition to the first valve component, a refrigerant chamber through which a refrigerant flows (i.e., 19) and a first refrigerant hole (i.e., 1) that communicates with the refrigerant chamber. 6) ⁇ 2020/175 549 63 ⁇ (:171? 2020 /007725
  • a base portion ( ⁇ 11, ⁇ 1121, ⁇ 13) in which a second refrigerant hole ( ⁇ 17) communicating with the above-mentioned refrigerant chamber is formed, and a drive unit ( ⁇ 1) that is displaced when its own temperature changes.
  • the amplifying portion of the second valve component By energizing the amplifying portion of the valve component, the amplifying portion of the second valve component is displaced with the hinge ( ⁇ ) of the second valve component as a fulcrum, and the second valve At the connection position (3) between the amplification part of the component and the movable part of the second valve component, the amplification part of the second valve component urges the movable part of the second valve component, The distance from the hinge of the second valve component to the connecting position of the second valve component is greater than the distance from the hinge of the second valve component to the biasing position of the second valve component.
  • first valve component and the second valve component may function to move the same valve element.
  • the valve device is configured integrally with the compressor that constitutes the refrigeration cycle.
  • the refrigeration cycle can be downsized by integrally forming the valve device and the compressor.
  • the valve component includes a failure detection unit that outputs a signal for determining whether the valve component is operating normally or has a failure. By outputting such a signal, the valve component can easily determine whether or not the valve component has a failure.
  • the signal is a signal according to the distortion amount of the amplification unit. By doing so, it is possible to determine whether or not there is a failure in the valve device based on the relationship between this signal and the control amount for controlling the valve component. ⁇ 2020/175 549 64 ⁇ (:171? 2020 /007725
  • the drive section generates heat when energized, and the failure detection section stops energization of the valve part when the valve part is out of order.
  • the signal is output to the device. In this way, by stopping the power supply when a valve component fails, it is possible to improve safety in the event of a failure.
  • the failure detection unit outputs the signal to a device that operates a notification device that notifies a person when the 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. Therefore, the valve component can be made compact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Micromachines (AREA)
  • Temperature-Responsive Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention concerne un dispositif de vanne qui doit être utilisé dans un cycle de réfrigération et qui comprend un corps (100), des éléments de vanne (13, 15) qui sont à l'intérieur d'une chambre de vanne (10), et un composant de vanne (X1) qui est destiné à déplacer les éléments de vanne (13, 15). Le composant de vanne (X1) comprend une partie de base, une partie d'entraînement, une partie d'amplification, et une partie mobile. Une chambre de fluide frigorigène à travers laquelle s'écoule un fluide frigorigène, un premier trou de fluide frigorigène qui communique avec la chambre de fluide frigorigène, et un second trou de fluide frigorigène qui communique avec la chambre de fluide frigorigène sont formés dans la partie de base La partie d'entraînement change de position lors du changement de température. La partie d'amplification amplifie les changements de position dépendant du changement de température de la partie d'entraînement La partie mobile se déplace en réponse aux changements de position amplifiés par la partie d'amplification qui lui sont transmis et ajuste ainsi le flux de fluide frigorigène à travers la chambre de fluide frigorigène entre le premier trou de fluide frigorigène et le second trou de fluide frigorigène. Un élément parmi le premier trou de fluide frigorigène et le second trou de fluide frigorigène communique avec un passage qui est à l'extérieur du dispositif de vanne, et l'autre élément communique avec la chambre de vanne (10).
PCT/JP2020/007725 2019-02-28 2020-02-26 Système de vanne WO2020175549A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080016800.6A CN113508088A (zh) 2019-02-28 2020-02-26 阀装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-035230 2019-02-28
JP2019035230A JP7074097B2 (ja) 2019-02-28 2019-02-28 弁装置

Publications (1)

Publication Number Publication Date
WO2020175549A1 true WO2020175549A1 (fr) 2020-09-03

Family

ID=72239954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/007725 WO2020175549A1 (fr) 2019-02-28 2020-02-26 Système de vanne

Country Status (3)

Country Link
JP (1) JP7074097B2 (fr)
CN (1) CN113508088A (fr)
WO (1) WO2020175549A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008286302A (ja) * 2007-05-17 2008-11-27 Panasonic Corp ロータリージョイントおよび回転弁体の異常検出機構
CN104344611A (zh) * 2013-08-08 2015-02-11 盾安环境技术有限公司 一种膨胀阀
US20150354875A1 (en) * 2013-06-25 2015-12-10 Zhejiang Dunan Hetian Metal Co., Ltd. On-Demand Micro Expansion Valve for a Refrigeration System

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6062484A (en) * 1998-05-20 2000-05-16 Eaton Corporation Modular thermal expansion valve and cartridge therefor
US8011388B2 (en) 2003-11-24 2011-09-06 Microstaq, INC Thermally actuated microvalve with multiple fluid ports
JP6583134B2 (ja) * 2016-05-06 2019-10-02 株式会社デンソー 冷凍サイクル装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008286302A (ja) * 2007-05-17 2008-11-27 Panasonic Corp ロータリージョイントおよび回転弁体の異常検出機構
US20150354875A1 (en) * 2013-06-25 2015-12-10 Zhejiang Dunan Hetian Metal Co., Ltd. On-Demand Micro Expansion Valve for a Refrigeration System
CN104344611A (zh) * 2013-08-08 2015-02-11 盾安环境技术有限公司 一种膨胀阀

Also Published As

Publication number Publication date
JP7074097B2 (ja) 2022-05-24
JP2020139562A (ja) 2020-09-03
CN113508088A (zh) 2021-10-15

Similar Documents

Publication Publication Date Title
JP2007512489A (ja) 可変容量形コンプレッサの制御に適したマイクロバルブ・デバイス
JPH1073345A (ja) 電磁弁一体型膨張弁
US7299646B2 (en) Expansion valve having solenoid relief valve
EP2700853B1 (fr) Soupape de commande
JPH11182983A (ja) 電磁弁一体型膨張弁
WO2020175544A1 (fr) Dispositif à cycle frigorifique
JP2012020599A (ja) 複合弁および車両用冷暖房装置
WO2020175549A1 (fr) Système de vanne
JP6958582B2 (ja) エジェクタ式冷凍サイクル装置
WO2020175545A1 (fr) Dispositif de vanne
JP7014239B2 (ja) 弁装置
WO2020175546A1 (fr) Dispositif à cycle de réfrigération, et vanne de réglage de pression d'évaporation
JP2009024945A (ja) 電磁弁付膨張弁
JP6988846B2 (ja) オイル戻し装置
JP5499299B2 (ja) 制御弁および車両用冷暖房装置
JP2012061911A (ja) 車両用冷暖房装置および制御弁
WO2020175542A1 (fr) Dispositif à cycle frigorifique
WO2020175543A1 (fr) Vanne intégrée
JP3528433B2 (ja) 蒸気圧縮式冷凍サイクル
JP2011255689A (ja) 車両用冷暖房装置および制御弁
WO2020175550A1 (fr) Dispositif de soupape
JP2009103018A (ja) 可変容量圧縮機用制御弁
JP4648692B2 (ja) 圧縮機用の切換弁装置
JP2009040214A (ja) 冷凍サイクルの制御方法
JP2007032345A (ja) 車両用空調機の弁装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20762956

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20762956

Country of ref document: EP

Kind code of ref document: A1