Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B41/00—Fluid-circulation arrangements
  • F25B41/30—Expansion means; Dispositions thereof
  • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
  • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
  • F04F5/48—Control
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B1/00—Compression machines, plants or systems with non-reversible cycle
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B49/00—Arrangement or mounting of control or safety devices
  • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

• the present disclosure relates to an ejector-type refrigeration cycle device.
• a flow rate adjusting unit that adjusts the flow rate of the refrigerant flowing into the suction unit of the ejector.
• a solenoid valve or a mechanical valve was used as the valve mechanism of this flow rate adjusting unit (for example, see Patent Document 1).
• the valve body is driven by an electromagnetic actuator.
• the valve element is driven by a pressure difference between the pressure in the greenhouse and the pressure of the flowing refrigerant and a spring.
• Patent Document 1 Japanese Unexamined Patent Publication No. 20 09 _ 4 6 0 5 4
• the conventional flow rate adjusting unit uses a solenoid valve, a mechanical valve, or the like. For this reason, the size of the flow rate adjusting unit is large.
• the present disclosure provides an ejector-type refrigeration cycle device capable of reducing the size of the flow rate adjusting unit as compared with the case where a conventional solenoid valve or a mechanical valve is used as the valve mechanism of the flow rate adjusting unit. With the goal.
• a radiator that radiates heat from the refrigerant discharged from the compressor A radiator that radiates heat from the refrigerant discharged from the compressor
• the nozzle section for ejecting the refrigerant flowing out from the radiator, the suction section for sucking the refrigerant by the flow of the refrigerant ejected from the nozzle section, and the cooling medium ejected from the nozzle section and the refrigerant sucked from the suction section are mixed.
• Ejector including a booster that boosts
• a flow rate adjusting part including a valve part for adjusting the flow rate of the refrigerant flowing into the suction part.
• a drive unit that displaces when its own temperature changes
• An amplification unit that amplifies the displacement due to the change in the temperature of the drive unit
• the displacement amplified by the amplifying unit is transmitted to move in the refrigerant chamber, thereby having a movable unit that switches between communication and cutoff between the first refrigerant hole and the second refrigerant hole through the refrigerant chamber,
• the drive section When the drive section is displaced due to a change in temperature, the drive section biases the amplification section at the bias position, so that the amplification section displaces with the hinge as a fulcrum and the amplification section is connected at the connection position between the amplification section and the movable section. Urges the movable part,
• the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position.
• a valve component is used as the valve mechanism of the flow rate adjusting unit.
• the valve parts can be made smaller than conventional solenoid valves and mechanical valves. Since the amplification part of the valve component functions as a lever, the displacement amount corresponding to the temperature change of the drive part is amplified by the lever and transmitted to the movable part. The amount of displacement of the drive unit is amplified by using the lever, which contributes to downsizing in comparison with conventional solenoid valves and mechanical valves that do not use such a lever. Therefore, as compared with the case where a conventional solenoid valve or a mechanical valve is used as the valve mechanism of the flow rate adjusting unit, the size of the flow rate adjusting unit can be reduced. ⁇ 2020/175548 3 ⁇ (:171? 2020 /007724
• Fig. 1 is a schematic view showing a configuration of a refrigeration cycle apparatus of a first embodiment.
• FIG. 2 is a sectional view of the valve device according to the first embodiment.
• Fig. 3 is a diagram showing the relationship between the valve state and the energized/de-energized state of the microvalve of the first embodiment.
• FIG. 4 is an exploded perspective view of the microvalve of the first embodiment.
• FIG. 5 is a side view of the microvalve of the first embodiment.
• Fig. 6 is a sectional view taken along line 1 _ 1 of Fig. 5.
• Fig. 7 is a sectional view taken along line 11_11 in Figs.
• FIG. 8 is a cross-sectional view of the microvalve corresponding to FIG.
• FIG. 9 is a sectional view taken along line IX-IX in FIG.
• FIG. 10 is a cross-sectional view of the valve device of Comparative Example 1.
• Fig. 11 is a schematic diagram showing a configuration of a refrigeration cycle device of a second embodiment.
• FIG. 12 is a cross-sectional view of the valve device according to the second embodiment.
• FIG. 13 is a diagram showing the relationship between the opening ratio and the opening degree of the microvalve of the second embodiment.
• FIG. 14 is a schematic diagram showing the configuration of the refrigeration cycle device of the third embodiment.
• FIG. 15 A sectional view of a valve device according to a third embodiment.
• FIG. 16 is an enlarged view of the area XVI in FIG.
• FIG. 17 is a diagram showing the relationship between the total opening degree and the valve operating state of the valve device according to the third embodiment.
• FIG. 18 A schematic diagram showing a structure of a refrigeration cycle apparatus of a fourth embodiment.
• FIG. 19 is a diagram showing the relationship between the total opening degree and the valve operating state of the valve device of the fourth embodiment.
• FIG. 20 A schematic diagram showing a structure of a refrigeration cycle apparatus of a fifth embodiment. ⁇ 2020/175 548 4 ⁇ (:171? 2020 /007724
• FIG. 21 A sectional view of a valve device according to a fifth embodiment.
• FIG. 22 is a cross-sectional view of the microvalve of the sixth embodiment, corresponding to FIG. 6.
• FIG. 23 An enlarged view of the area XXI I I in Fig. 22.
• the refrigeration cycle apparatus 10 of the present embodiment shown in FIG. 1 is an ejector type refrigeration cycle apparatus mounted on a vehicle.
• the refrigeration cycle device 10 cools a vehicle compartment (not shown) and refrigerates a cool box (not shown).
• a cool box is a refrigerator for vehicles that cools drinks.
• the cool box has a case. The case forms a space inside the refrigerator in which the object to be cooled is stored, and also stores the components of the refrigeration cycle device 10.
• the refrigeration cycle apparatus 10 includes a compressor 12, a radiator 14, an expansion valve 15, an ejector 16, a first evaporator 18, a branch section 20 and a valve apparatus 2. 2 and a second evaporator 24.
• the components of the refrigeration cycle apparatus 10 are connected to each other so as to form a vapor compression refrigeration cycle.
• the compressor 12 compresses the discharged refrigerant and discharges it.
• the compressors 12 are driven by the vehicle engine.
• the radiator 14 radiates the refrigerant by exchanging heat between the refrigerant compressed by the compressor 12 and the air outside the vehicle compartment.
• the expansion valve 15 is provided between the branch section 20 and the ejector 16 upstream of the refrigerant flow.
• the expansion valve 15 decompresses and expands the refrigerant flowing out from the radiator 14.
• the expansion valve 15 is a thermal expansion valve, and adjusts the flow rate of the refrigerant passing through the expansion valve 15 according to the degree of superheat of the refrigerant flowing out from the first evaporator 18.
• the ejector 16 decompresses the refrigerant flowing out from the expansion valve 15 to generate the first evaporator.
• the ejector 16 has a nozzle section 1 63 and a suction section 1 ⁇ 2020/175548 5 ⁇ (: 171-1? 2020/007724
• the nozzle section 163 ejects the inflowing refrigerant to expand the refrigerant under reduced pressure.
• Suction unit 1 6 spoon sucks refrigerant by the flow of the refrigerant ejected from the nozzle section 1 6 3.
• the pressurizing unit 160 increases the pressure by mixing the refrigerant ejected from the nozzle unit 1 63 and the refrigerant sucked from the suction unit 16 3.
• Booster The pressurized refrigerant flows out toward the first evaporator 18.
• the first evaporator 18 cools the air and evaporates the refrigerant by heat exchange between the refrigerant flowing out of the ejector 16 and the air sent to the inside of the vehicle compartment.
• the branch portion 20 is provided between the refrigerant flow downstream side of the radiator 14 and the refrigerant flow upstream side of the ejector 16.
• the branching section 20 branches the refrigerant on the downstream side of the radiator 14 in the refrigerant flow into one and the other.
• One of the branched refrigerant flows toward the nozzle portion 16 3 of the ejector 16.
• the other branched refrigerant flows toward the suction portion 1613 of the ejector.
• the valve device 22 is provided in the suction side flow passage 2 1 through which the refrigerant flows from the branch portion 20 toward the suction portion 16 of the ejector 16.
• the valve device 22 is a flow rate adjusting unit that adjusts the flow rate of the refrigerant flowing into the second evaporator 24 and reduces the pressure of the refrigerant flowing into the second evaporator 24.
• the valve device 22 includes a micro valve X1 and a fixed throttle 23 connected in series.
• the valve device 22 is an integrated microvalve X 1 and fixed throttle 23. Note that adjusting the flow rate of the refrigerant includes making the flow rate zero.
• Adjusting the flow rate of the cooling medium flowing through the suction side flow path 21, adjusting the flow rate of the refrigerant flowing into the second evaporator 24, and adjusting the flow rate of the refrigerant flowing into the suction section 16 Doing has the same meaning.
• the microvalve X1 opens and closes the suction side flow path 21.
• the microvalve X 1 is used as a switching valve that switches between a state in which the refrigerant flows and a state in which the refrigerant does not flow in the suction side flow path 21.
• the fixed throttle 23 has a fixed throttle opening. That is, the fixed throttle 23 has a fixed flow passage cross-sectional area. The fixed throttle 23 expands the refrigerant under reduced pressure when the refrigerant flows through the suction side flow path 21.
• the valve device 22 is housed inside the case of the cool box. Valve device ⁇ 2020/175 548 6 ⁇ (:171? 2020 /007724
• the second evaporator 24 is provided between the valve device 22 and the suction portion 16 in the suction side flow passage 21.
• the second evaporator 24 is housed inside the case of the cool box.
• the second evaporator 24 cools the air inside the cool box by heat exchange between the refrigerant and the air inside the cool box, and evaporates the refrigerant.
• the micro valve X1 When the cool box is used, the micro valve X1 is open. The high temperature and high pressure refrigerant is discharged from the compressor 12 by the operation of the compressor 12. The high temperature and high pressure refrigerant discharged from the compressor 12 is radiated by the radiator 14. The refrigerant radiated by the radiator 14 is branched into one refrigerant and the other refrigerant by the branching section 20.
• One of the branched refrigerants is decompressed and expanded by the expansion valve 15 and then ejected by the ejector 1
• the refrigerant that has flowed into the nozzle portion 163 is decompressed and expanded by being injected from the nozzle portion 163.
• the refrigerant injected from the nozzle section 163 flows into the booster section 160 together with the refrigerant flowing from the suction section 166.
• the refrigerant that has flowed into the pressure booster 160 is boosted and then pressure booster 1 Outflow from.
• the refrigerant flowing out of the booster 160 flows through the first evaporator 18.
• the first evaporator 18 cools the air inside the vehicle compartment by evaporating the refrigerant. As a result, the interior of the vehicle compartment is cooled.
• the cooling medium flowing out from the first evaporator 18 is sucked into the compressor 12.
• the other branched refrigerant flows into the valve device 22.
• the refrigerant flowing into the valve device 22 is decompressed by the fixed throttle 23 and flows out from the valve device 22.
• the refrigerant flowing out from the valve device 22 flows into the second evaporator 24.
• the second evaporator 24 cools the air inside the cool box by evaporating the refrigerant. As a result, the cool box is refrigerated.
• the refrigerant flowing out of the second evaporator 24 flows into the suction section 16.
• one of the refrigerant branched at the branching portion 20 flows in the order of the nozzle portion 163, the boosting portion 160, and the first evaporator 18 in this order so that the branching portion 20 Ejector ⁇ 2020/175 548 7 ⁇ (:171? 2020 /007724
• the other refrigerant branched at the branch part 20 flows in the order of the valve device 2 2, the second evaporator 24, and the suction part 16 s, so that the branch part 20, the valve device 2 2 and the second evaporator 2 2 4 and ejector 1 6 are connected.
• the refrigerant does not flow between the branch portion 20 and the suction portion 16.
• Other cooling medium flows are the same as when using the cool box.
• valve device 2 Refer0025] Next, the configuration of the valve device 22 will be described. As shown in Figure 2, valve device 2
• the flow channel forming member 30 has a coolant flow channel 31 formed therein.
• the refrigerant channel 31 includes a first channel 32, a second channel 33, a third channel 34, and a fixed throttle 23.
• the first flow passage 32 communicates with the refrigerant inlet portion 3033 of the flow passage forming member 30.
• the third flow path 34 communicates with the refrigerant outlet section 30 of the flow path forming member 30.
• the first flow passage 32 and the second flow passage 33 are not in direct communication with each other, but are in communication with each other through the flow passage of the valve module ⁇ .
• the second flow passage 33 and the third flow passage 34 are communicated with each other via the fixed throttle 23.
• the fixed throttle 23 is a channel having a channel cross-sectional area smaller than that of each of the second channel 33 and the third channel 34.
• the channel cross-sectional area is the cross-sectional area of the channel.
• the flow path forming member 30 is a member made of metal.
• the valve module ⁇ is connected to the flow path forming member 30.
• the valve module ⁇ has a micro valve X I, a valve casing 2, a sealing member 3, two ⁇ rings X 4, X 5, and two electric wirings X 6, X 7.
• the micro valve XI is a plate-shaped valve component, and is mainly composed of a semiconductor chip.
• the microvalve XI may or may not have components other than the semiconductor chip. Therefore, the microvalve X 1 can be made compact.
• the length in the longitudinal direction orthogonal to the thickness direction is, for example, 1 Yes, long ⁇ 2020/175 548 8 ⁇ (:171? 2020 /007724
• the length in the lateral direction orthogonal to both the thickness direction and the thickness direction is 5
• the present invention is not limited to this.
• the micro valve X I functions as an opening/closing valve. Opening and closing is switched by switching between energized and de-energized Micro Valve X I. Specifically, as shown in Fig. 3, the micro valve X I is a normally closed valve that opens when energized and closes when de-energized.
• the electrical wiring 6 and 7 extend from the two plate surfaces on the front and back of the microvalve X1, the surface opposite to the valve casing X2, and the sealing member X3 and valve are provided. It passes through the casing X 2 and is connected to the power supply outside the valve module X 0. As a result, electric power is supplied from the power supply to the micro valve X 1 through the electric wiring X 6 and X 7.
• the valve casing 2 is a resin casing that houses the microvalve X1.
• 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 flow path forming member 30 and the micro valve X 1 so that the micro valve X 1 and the flow path forming member 30 do not come into direct contact with each other.
• One surface of the bottom wall is in contact with and fixed to the flow path forming member 30 and the other surface is in contact with and fixed to one of the two plate surfaces of the microvalve X 1.
• the micro valve X 1 is provided in the flow path forming member 30 via the valve casing X 2.
• the valve casing X 2 can absorb the difference in linear expansion coefficient between the microvalve X I and the flow path forming member 30. 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 flow path forming member 30.
• the bottom wall of the valve casing X2 projects from the plate-shaped base portion X20 facing the microvalve X1 and the base portion X20 in a direction away from the microvalve X1. It has a pillar-shaped first protruding portion 21 and a second protruding portion X 22. ⁇ 2020/175 548 9 ⁇ (:171? 2020 /007724
• the first protrusion X 21 is fitted into the first opening 35 formed in the flow path forming member 30.
• the first opening 35 is connected to the first flow path 32.
• the first projecting portion X21 is formed with a first communicating hole XV1 penetrating from the micro valve X1 side end to the first flow path 32 side end.
• the first communication hole XV 1 communicates with the first flow path 32.
• the second protrusion X22 is fitted into the second opening 36 formed in the flow path forming member 30.
• the second opening 36 communicates with the second flow path 33.
• the second projecting portion X22 is formed with a second communication hole XV2 penetrating from the micro valve X1 side end to the second flow path 33 side end.
• the second communication hole XV 2 communicates with the second flow path 33.
• the sealing member X 3 is a member made of epoxy resin that seals the other open side of the valve casing X 2.
• 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.
• the sealing member X3 covers the electric wirings X6 and X7 to realize waterproofing and insulation of the electric wirings X6 and X7.
• 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 protruding portion X21, and is a flow path forming member.
• the ring X5 is attached to the outer periphery of the second protrusion X22 and seals between the flow path forming member 30 and the second protrusion X22, so that the refrigerant leaks to the outside of the valve device 22. Suppress.
• the microvalve X 1 is a MEMS including a first outer layer X 1 1, a middle layer X 1 2, and a second outer layer X 1 3, both of which are semiconductors.
• MEMS Micro Electro Mechanical Systems.
• the first outer layer X11, the middle layer X12, and the second outer layer X13 are rectangular plate-shaped members each having the same outer shape, and the first outer layer X11, the middle layer X12, and the first layer X12. 2
• the outer layers X 1 3 are laminated in this order. That is, the middle layer X 1 2 has both sides on the first outer layer X 1 1 and the second outer layer X 1 3. ⁇ 2020/175548 10 ⁇ (: 171-1? 2020/007724
• the second outer layer XI3 is arranged on the side closest to the bottom wall of the valve casing X2.
• the structures of the first outer layer X 11 and the intermediate layer X 12 and the second outer layer X 13 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. 4, the first outer layer X I 1 is formed with two through holes 14 and X 15 penetrating the front and back. The ends of the electrical wirings X 6 and X 7 on the micro valve X 1 side are inserted into the through holes 14 and X 15 respectively.
• the second outer layer X I 3 is a conductive semiconductor member having a non-conductive oxide film on its surface. As shown in FIG. 4, FIG. 6, and FIG. 7, the second outer layer X I 3 is formed with a first refrigerant hole X I 6 and a second refrigerant hole X I 7 penetrating both sides. As shown in Fig. 7, the first refrigerant hole X 16 communicates with the first communication hole 1 of the valve casing X 2, and the second refrigerant hole XI 7 communicates with the second communication hole 2 of the valve casing X 2. To do.
• the hydraulic diameter of each of the first refrigerant hole X I 6 and the second refrigerant hole X I 7 is, for example, 0.111101 or more and 3010! or less, but is not limited thereto.
• the intermediate layer X I 2 is a conductive semiconductor member.
• the middle layer X I 2 is the first outer layer
• the intermediate layer XI 2 includes a first fixing portion X 121, a second fixing portion X 122, a plurality of first ribs X 1 23, a plurality of second ribs X 1 24, It has a spine X 1 25, an arm X 1 26, a beam XI 27, and a movable part X 1 28.
• the first fixing portion X121 is a member fixed to the first outer layer X11 and the second outer layer X13.
• the 1st fixed part X 122 has 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 28 Are formed so as to surround the same refrigerant chamber X 19 inside.
• the refrigerant chamber X 19 is a chamber surrounded by the first fixed portion X 121, the first outer layer X 11 and the second outer layer X 13.
• the first fixed part X 122, the first outer layer X 11 and the second outer layer XI 3 correspond to the base as a whole.
• the number of the first ribs X 1 2 3 and the plurality of second ribs X 1 2 4 are electric wiring for changing and changing the temperature.
• the fixation of the first fixing portion X1 2 1 to the first outer layer X1 1 and the second outer layer X13 is such that the refrigerant flows 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 1 2 2 is fixed to the first outer layer X 11 and the second outer layer X 1 3.
• the second fixed portion X 1 2 2 is surrounded by the first fixed portion X 1 2 1 and is arranged apart from the first fixed portion X 1 2 1.
• arm X 1 26, beam X 1 27, movable part X 1 2 8 are not fixed to the first outer layer X 1 1 and the second outer layer X 1 3, and the first outer layer X 1 1 , Is displaceable with respect to the second outer layer X 1 3.
• the spine X I 25 has the shape of an elongated rod extending in the lateral direction of the rectangular shape of the intermediate layer X 1 2.
• One end of the spine X I 2 5 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 a direction orthogonal to the longitudinal direction of the spine X I 25.
• 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 2 3 3 has an elongated rod shape and can expand and contract depending on the temperature.
• Each first rib X 1 23 is connected to the first fixed portion X 1 21 at one end in the longitudinal direction and is connected to the spine X I 2 5 at the other end. Then, as the first ribs XI 23 become closer to the spine X 1 2 5 side from the first fixed portion X 1 21 side, the offset is set toward the longitudinal beam X 1 2 7 side of the spine X 1 2 5. Skewed to the Spine XI 25. Then, the plurality of first ribs X I 23 extend parallel to each other.
• the plurality of second ribs X1 2 4 is the direction orthogonal to the longitudinal direction of the spine X 1 2 5. ⁇ 0 2020/175 548 12 (: 17 2020/007724
• Each second rib 1 2 4 has an elongated rod shape and can expand and contract depending on the temperature.
• Each of the second ribs X 1 2 4 is connected to the second fixing portion X 1 2 2 at one end in the longitudinal direction and is connected to the spine X I 2 5 at the other end. Then, each second rib XI 24 is offset toward the longitudinal beam X 1 2 7 side of the spine X 1 2 5 as the second fixing portion XI 2 2 side is closer to the spine XI 25 side. , It is skewed to Spine XI 25. Then, the plurality of second ribs X I 2 4 extend parallel to each other.
• first ribs 1 2 3 Multiple first ribs 1 2 3, multiple second ribs 1 2 4, spine X 1 2
• the arm X I 26 has an elongated rod shape that extends non-orthogonally and parallel to 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 9 2 of the 1 2 7 and the connection position X 3 of the beam X 1 27 and the movable part X 1 2 8 are arranged in this order along the longitudinal direction of the beam X 1 27. If the connection point between the first fixed part X 1 2 1 and the arm X 1 26 is hinge X 0, from the hinge X 0 to the connection position X 2 in the plane parallel to the plate surface of the intermediate layer X 1 2. The straight line distance from hinge X 0 to connection position X 3 is longer than the straight line distance of.
• the outer shape of the movable portion X 1 28 has a rectangular shape extending in the direction of approximately 90° with respect to the longitudinal direction of the beam X 1 27.
• This movable part XI 2 8 is ⁇ 2020/175 548 13 ⁇ (:171? 2020 /007724
• 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.
• the first application point X1 2 9 near the portion of the first fixing 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
• the end of the electric wiring X6 that has passed through the through hole X14 of the outer layer X11 is connected to the microvalve X1 side end.
• the micro valve X 7 of the electrical wiring X 7 that passes through the through hole X 1 5 of the first outer layer X 1 1 shown in FIG. 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 25 toward the connecting position 2 side.
• the biased spine XI 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 XI 2 6 integrally changes its posture with the hinge X 0 as a fulcrum and the connecting position 2 as a force point.
• the movable part X 1 28 which is connected to the end opposite to the arm X I 2 6 of X, also moves in the longitudinal direction, to the side where the spine X I 2 5 pushes the beam X I 2 7.
• the movable portion X 1 28 reaches the position where the tip in the moving direction abuts the first fixed portion X 1 21 as shown in FIGS. 8 and 9.
• 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 X I 2. Therefore, the amount of movement of the connection position X 3, which is the point of action, is greater than the amount of movement of the connection position 2, which is the force point. Therefore, the amount of displacement due to thermal expansion is amplified by the lever and transmitted to the movable part X 1 28.
• the through hole X 1 20 is the first refrigerant hole in the direction orthogonal to the plate surface of the intermediate layer XI 2.
• X 16 and the second refrigerant hole X 17 overlap.
• the first refrigerant hole X 16 and the second refrigerant hole X 17 are communicated with each other through the through hole X 120 which is a part of the refrigerant chamber X 19.
• the refrigerant can flow between the first communication hole 1 and the second communication hole 2 through the first refrigerant hole XI 6, the through hole XI 20 and the second refrigerant hole XI 7.
• the micro valve X 1 opens.
• the flow path of the refrigerant in the micro valve X 1 has the 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 middle layer X ⁇ 2020/175 548 15 ⁇ (:171? 2020 /007724
• the direction orthogonal to the plate surface of 12 is the laminating direction of the first outer layer X I 1, the intermediate layer X I 2, and the second outer layer X 13.
• the micro valve X 1 when the micro valve X 1 is not energized, the voltage application from the electric wiring 6, 6 to the first application point X 1 29 and the second application point X I 30 is stopped. Then, the current stops flowing through the plurality of first ribs X 1 23 and the plurality of second ribs X 1 24, and the temperatures of the plurality of first ribs 1 23 and the plurality of second ribs X 1 24 decrease. As a result, each of the plurality of first ribs X I 23 and the plurality of second ribs X I 24 contracts in its longitudinal direction.
• the plurality of first ribs XI 23 and the plurality of second ribs XI 24 urge the spine XI 25 to the side opposite to the connection position 2.
• the biased spine X 1 25 pulls the beam X 1 27 at the connecting position X 2.
• the member consisting of the beam X 127 and the arm X I 26 changes its posture as a unit with the hinge ⁇ as the fulcrum and the connecting position 2 as the fulcrum.
• the movable part X I 28 connected to the end of the beam X 1 27 opposite to the arm X I 26 also moves in the longitudinal direction to the side where the spine X I 25 pulls the beam X I 27.
• the movable portion X I 28 reaches a position where it does not contact the first fixed portion X 1 2 1, as shown in FIGS. 6 and 7.
• this position of the movable part X 128 is referred to as the non-energized position.
• the through hole X 120 is the first hole in the direction orthogonal to the plate surface of the intermediate layer X 1 2. It overlaps with the refrigerant hole X 16 but does not overlap with the second refrigerant hole XI 7 in that direction.
• the second refrigerant hole X I 7 overlaps with the movable portion X 128 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.
• the first refrigerant hole X 16 and the second refrigerant hole X 17 are blocked in the refrigerant chamber X 19.
• the flow of the refrigerant between the first communication hole 1 and the second communication hole 2 through the first refrigerant hole X I 6 and the second refrigerant hole X I 7 is hindered. That is, the micro valve X 1 is closed.
• the micro valve XI closes when not energized and opens when energized. ⁇ 2020/175 548 16 ⁇ (:171? 2020 /007724
• the microvalve X 1 opens and closes the refrigerant channel 31 including the fixed throttle 23.
• the valve device 22 can adjust the flow rate of the refrigerant flowing through the suction side flow path 21 to one of zero and a flow rate higher than that.
• Refrigerant flows through the fixed throttle 23 when the micro valve X I is opened.
• the valve device 22 can reduce the pressure of the refrigerant flowing through the suction side flow path 21.
• the valve device of Comparative Example 1 "22 shown in Fig. 10 is an example of a conventional valve device.
• a solenoid valve “22 3” serving as an on-off valve and a fixed throttle “22” are integrated.
• the solenoid valve” 2 2 3 has a solenoid part” 1 that converts electric energy into mechanical motion, and a valve part 2 that opens and closes a flow path.
• the solenoid part “1” includes a coil “3" and a piston "4".
• the valve part 2 includes a valve body 5 and a valve seat 6.
• the fixed throttle "22 and the valve seat” 6 are formed in the flow path forming member "30.
• the flow channel forming member “30 forms a coolant flow channel” 31 inside.
• the refrigerant flow path” 3 1 includes a first flow path” 32, a second flow path “33, and a fixed throttle” 22 cap.
• the first flow path” 32 is in communication with the refrigerant inlet portion “30 3 of the flow path forming member 30 ”.
• the second flow path” 33 communicates with the coolant outlet section 30 of the flow path forming member 30.
• the "first flow path" 32 and the second flow path 33 are communicated with each other through a valve seat opening and a fixed throttle "2213 formed inside the valve seat" 6.
• the piston "4" moves according to the energization state of the "coil” 3.
• the movement of the piston “4” moves the valve body “5” provided at the end of the piston” 4.
• the valve body “5" contacts the valve seat “6” or the valve body “5 separates from the valve seat” 6, the refrigerant flow path "3 1 is opened and closed.
• the valve device of Comparative Example 1 "22 is housed inside the cool box. Since the cool box is installed inside the vehicle, the overall size of the cool box is limited. Since the solenoid valve "0" has a large physique, the valve device "22 of Comparative Example 1" has a large physique. For this reason, the capacity of the cool box is reduced by the volume of the valve device. ⁇ 2020/175 548 17 ⁇ (: 171-1? 2020/007724
• the micro valve X 1 is used as the valve mechanism of the valve device 22.
• the micro valve X 1 can be easily miniaturized compared to the solenoid valve 0.
• the micro valve X 1 is formed by the semiconductor chip as described above.
• the use of the lever to amplify the amount of displacement due to thermal expansion also contributes to downsizing as compared with a solenoid valve that does not use such a lever.
• the size of the valve device 22 can be made smaller than that of the valve device 22 of Comparative Example 1. That is, the volume of the valve device 22 can be reduced as compared with the valve device 22 of Comparative Example 1.
• the volume decrease of the valve device 22 can be used for the capacity increase of the cool box. Therefore, the capacity of the cool box can be increased.
• valve device 22 is also lightweight.
• the refrigeration cycle device 10 includes a valve device 40 instead of the valve device 22 of the first embodiment.
• the other configurations of the refrigeration cycle apparatus 10 are the same as those in the first embodiment.
• the valve device 40 includes a microvalve X1.
• the valve device 40 is a flow rate adjusting unit that adjusts the flow rate of the refrigerant flowing into the second evaporator 24 and reduces the pressure of the cooling medium flowing into the second evaporator 24. Adjusting the coolant flow rate includes zeroing the flow rate.
• the valve device 40 has a flow path forming member 41 and a valve module X 0. ⁇ 2020/175 548 18 ⁇ (:171? 2020 /007724
• the flow channel forming member 41 has a coolant flow channel 42 formed therein.
• the coolant channel 42 includes a first channel 43 and a second channel 44.
• the first flow path 43 communicates with the coolant inlet port 41 3 of the flow path forming member 41.
• the second flow path 44 communicates with the refrigerant outlet portion 41 of the flow path forming member 41.
• the first flow channel 43 and the second flow channel 44 do not communicate directly with each other inside the flow channel forming member 41, but communicate with each other through the flow channel of the valve module X 0.
• the flow path forming member 41 is a metal member.
• the valve module ⁇ is connected to the flow path forming member 41.
• the structure of the valve module ⁇ is the same as that of the valve module ⁇ of the first embodiment.
• the first projecting portion X 21 is fitted into the first opening 45 formed in the flow path forming member 41.
• the first opening portion 45 communicates with the first flow path 43. Therefore, the first communication hole 1 communicates with the first flow path 43.
• the second projecting portion X 22 is fitted into the second opening 46 formed in the flow path forming member 41.
• the second opening portion 46 communicates with the second flow passage 4 4. Therefore, the second communication hole
• the voltage applied to 30 is controlled by ⁇ /1 ⁇ /1.
• the ⁇ /1 ⁇ /1 control is a control that repeatedly switches between energization and de-energization. At this time, The larger the ratio, the more power is supplied.
• the ratio is the ratio of energizing time to a certain period. The higher the power, the higher the temperature and the greater the amount of thermal expansion. For this reason, The larger the ratio, the greater the amount of movement during energization compared to when de-energized. Therefore, by the ⁇ /1 ⁇ /1 control, the position of the movable part X 1 2 8 can be continuously changed from the fully closed position to the fully open position.
• the microvalve XI is By continuously changing the ratio from 0% to 100%, the flow passage opening can be linearly changed from 0% to 100%.
• the flow passage cross-sectional area when the flow passage opening is larger than 0% is the size for depressurizing the refrigerant. In this way, the micro valve XI opens and closes the refrigerant flow path and opens the refrigerant flow path. ⁇ 2020/175 548 19 ⁇ (:171? 2020 /007724
• valve device 40 can adjust the flow rate of the refrigerant flowing through the suction side flow passage 21 to any size within the range from 0 to the maximum value, and the suction side flow passage 21 It is possible to reduce the pressure of the refrigerant flowing through.
• the flow rate of the refrigerant flowing through the second evaporator 24 can be adjusted to a desired flow rate by adjusting the flow passage opening of the micro valve X 1. Therefore, the cooling capacity of the second evaporator 24 can be adjusted by adjusting the flow rate of the refrigerant flowing through the second evaporator 24. This makes it possible to bring the temperature inside the cool box to the target temperature.
• the refrigeration cycle apparatus 10 includes a valve device 50 instead of the valve device 22 of the first embodiment.
• the valve device 50 is a flow rate adjusting unit that adjusts the flow rate of the refrigerant flowing into the second evaporator 24 and reduces the pressure of the refrigerant flowing into the second evaporator 24. Adjusting the flow rate of the refrigerant includes zeroing the flow rate.
• valve device 5 0 includes a refrigerant inlet portion 5 1 3 where the refrigerant flows, and a refrigerant outlet portion 5 1 13 the refrigerant flows out.
• the refrigerant inlet section 5 13 is connected to one of the two refrigerant outlet sections of the branch section 20 on the refrigerant outlet side.
• the refrigerant outlet section 511 is connected to the refrigerant inlet side of the second evaporator 24.
• the valve device 50 includes one solenoid valve 503, one fixed throttle 50, and one micro valve X1.
• the solenoid valve 50 3 is an on-off valve that opens and closes a refrigerant flow path from the refrigerant inlet portion 5 13 of the valve device 50 to the refrigerant outlet portion 5 1 of the valve device 50.
• the fixed throttle 50 expands the refrigerant flowing from the refrigerant inlet portion 5 13 under reduced pressure.
• the microvalve XI opens and closes the bypass flow path that guides the refrigerant flowing from the refrigerant inlet section 5 1 3 to the refrigerant outlet section 5 1 slot by fixedly squeezing the refrigerant and bypassing the 50 slot. The pressure of the refrigerant flowing through the bypass passage is reduced.
• the other configuration of the refrigeration cycle device 10 is the same as that of the first embodiment. ⁇ 2020/175 548 20 ⁇ (:171? 2020 /007724
• valve device 50 A specific configuration of the valve device 50 will be described. As shown in Fig. 15, in the valve device 50, the solenoid valve 503, the fixed throttle 50, and the micro valve X I are integrally configured. Specifically, the valve device 50 has a flow path forming member 51, a solenoid portion 52, a valve body 53, and a valve module O.
• the flow path forming member 51 is a member made of metal.
• the flow channel forming member 5 1 forms a coolant flow channel 5 11 in which a coolant flows.
• the refrigerant channel 5 11 includes a first channel 5 12 and a second channel 5 13; a valve chamber 5 14; a valve seat channel 5 15; and a fixed throttle 50. ..
• the first flow path 5 1 2 and the second flow path 5 13 are in communication with each other through the valve chamber 5 14 and the valve seat flow path 5 15 and the fixed throttle 50.
• a refrigerant inlet portion 5 13 and a refrigerant outlet portion 5 1 are formed in the flow path forming member 5 1.
• the first flow path 5 12 communicates with the refrigerant inlet section 5 13.
• the second flow path 5 13 communicates with the refrigerant outlet portion 5 1.
• valve body 5 3 is arranged in the valve chamber 5 14.
• the fixed throttle 50 is a channel having a smaller channel cross-sectional area than the first channel 5 12 and the second channel 5 13.
• the flow path forming member 5 1 includes a valve chamber forming portion 5 4 forming a valve chamber 5 14 and a fixed throttle.
• the fixed throttle forming portion 55 is located in the valve chamber 5 14. In addition to the fixed throttle 50, the fixed throttle forming portion 55 forms a valve seat channel 5 15 and a part of the second channel 5 13. The end of the fixed throttle forming part 5 5 on the valve seat channel 5 15 side is the valve seat 5 16.
• the solenoid unit 52 converts electric energy into mechanical motion.
• the solenoid part 52 includes a coil 521 and a piston 522.
• the piston 5 2 2 moves according to the energized state of the coil 5 2 1.
• the valve body 5 3 is fixed to the end of the piston 5 22.
• the valve body 53 is made of synthetic rubber. The movement of the piston 5 2 2 causes the valve body 5 3 to come into contact with the valve seat 5 16 or move away from the valve seat 5 16. That is, the valve body 5 3 ⁇ 2020/175 548 21 ⁇ (:171? 2020 /007724
• the solenoid part 52, the valve body 53, and the valve seat 5 16 constitute a solenoid valve 50.
• the fixed aperture forming portion 55 has a first through hole 553 and a second through hole 55.
• the valve chamber forming section 5 4, the third through-hole 5 4 3 and the fourth through hole 5 4 spoon is formed. 1st through hole 5 5 3 and 3rd through hole 5
• the second through hole 55 and the fourth through hole 54 are arranged coaxially.
• the valve module ⁇ has the micro valve X I, the valve casing X 2, the sealing member X 3, and the two electric wirings X 6 and X 7, as in the first embodiment. Unlike the first embodiment, the valve module ⁇ has four ⁇ rings X 4, X 5, 8, and 9.
• the valve module ⁇ is provided outside the flow path forming member 51.
• the first protrusion X21 of the valve casing X2 is the first through hole 553 and the third through hole.
• the tip of the first protruding portion X21 is located inside the first through hole 553.
• the first communication hole 1 communicates with the valve seat channel 5 15 on the upstream side of the fixed throttle 50 13 in the refrigerant flow through the first through hole 5 53.
• the second protruding portion X 22 of the valve casing X 2 is fitted in the second through hole 5 5 and the fourth through hole 5 4.
• the tip of the second protrusion X 22 is located inside the second through hole 55.
• the second communication hole 2 communicates with the second flow passage 5 13 on the downstream side of the refrigerant flow of the fixed throttle 50 5 via the second through hole 55.
• the flow path forming member 51 and the valve casing X2 collectively form a flow path that forms a refrigerant flow path from the refrigerant inlet port 513 to the refrigerant outlet port 51.
• a first through hole 5 5 3, a first communication Ana ⁇ 1, a second communication Tsuana ⁇ 2, and the second through hole 5 5 spoon is, as a whole, the refrigerant flowing from the refrigerant inlet portion 5 1 3 It corresponds to the bypass flow path that bypasses the fixed throttle 50 and leads to the refrigerant outlet 51.
• the refrigerant flow path 5 11, the first through hole 5 53, the first communicating hole V 1, the second communicating hole 2 and the second through hole 5 5 Corresponding to the refrigerant flow path from the refrigerant inlet portion to the refrigerant outlet portion of the flow rate adjusting unit. ⁇ 2020/175 548 22 ⁇ (:171? 2020 /007724
• the solenoid valve 50 3 opens.
• the solenoid valve 50 3 is opened and the micro valve X 1 is closed, the refrigerant flowing out from the radiator 14 is branched at the branching section 20.
• One of the branched refrigerant flows through the ejector 16 and the first evaporator 18 in order.
• the other branched refrigerant flows into the refrigerant inlet portion 5 13 of the valve device 50.
• the refrigerant that has flowed into the refrigerant inlet section 5 13 flows in the order of the first flow path 5 1 2, the valve seat flow path 5 15, the fixed throttle 50, and the second flow path 5 13 and then the refrigerant outlet. Outflow from part 5 1 13.
• the refrigerant flowing out of the refrigerant outlet portion 5 1 13 flows into the suction portion 16 of the ejector 16 after flowing through the second evaporator 24.
• a refrigerant flow passing through the micro valve X1 is formed in addition to the above refrigerant flow. .. That is, inside the valve device 50, the refrigerant flow from the refrigerant inlet part 5 13 to the refrigerant outlet part 5 1 13 through the fixed throttle 5 0 13 and the refrigerant inlet part 5 1 3 to the fixed restrictor 5 13. A refrigerant flow is formed which bypasses the 0th arm and reaches the first refrigerant outlet part 51.
• the minimum flow passage cross-sectional area when the microvalve X 1 is opened is set to a size that expands the refrigerant under reduced pressure.
• the refrigerant decompressed and expanded by the micro valve X I and the refrigerant decompressed and expanded by the fixed throttle 50 join together.
• the combined refrigerant flows out from the refrigerant outlet portion 5 1 13.
• the refrigerant flowing out from the refrigerant outlet portion 5 1 13 flows into the second evaporator 2 4 and then into the suction portion 16 of the ejector 16 (and then flows in.
• the valve device 50 can open and close the flow path and change the opening of the flow path in two steps. Set the flow path opening of the valve device 50 to 1 when both the solenoid valve 50 3 and the micro valve X 1 are open. ⁇ 2020/175 548 23 ⁇ (:171? 2020 /007724
• the opening will be 0%.
• the flow path opening of the valve device 50 when the solenoid valve 503 is closed is 0%.
• the opening when the solenoid valve 503 is opened and the microvalve X I is closed is an intermediate opening 81 between 0% and 100%.
• the solenoid valve 503 when the cool box is normally used, the solenoid valve 503 is opened and the micro valve X1 is closed.
• the micro valve X 1 With the solenoid valve 50 3 open.
• the flow rate of the refrigerant flowing out of the valve device 50 can be increased and the flow rate of the refrigerant flowing through the second evaporator 24 can be increased as compared with when the micro valve X I is closed. Therefore, the cooling capacity of the second evaporator 24 can be increased.
• the valve device 50 includes one solenoid valve 50, one fixed throttle 5013, and two microvalves X 1 and 1 1. Each of the fixed throttle 50 and the two microvalves X 1 and 1 is connected in parallel with each other between the cooling medium inlet portion 5 13 and the refrigerant outlet portion 5 11 13.
• the structure of the microvalve 1 is the same as that of the microvalve X 1.
• the other structure of the valve device 50 is the same as that of the third embodiment.
• the valve device 50 can open and close the flow path and change the opening of the flow path in three steps.
• the solenoid valve 50 3 the micro valve X 1 and the valve 1 are all open, the flow passage opening of the valve device 50 is 100%.
• the flow passage opening of the valve device 50 when the solenoid valve 503 is closed is set to 0%.
• the opening degree is the first intermediate opening between 0% and 100%.
• Eighty-two When the solenoid valve 503 is opened, the micro valve X1 is opened, and the micro valve 1 is closed, the opening degree is the second intermediate opening between 0% and 100%. It is 3 in 8 degrees.
• the second intermediate opening 83 is larger than the first intermediate opening 82.
• the flow rate of the refrigerant flowing through the second evaporator 24 can be adjusted in three stages by opening and closing each of the microvalve X I and the cage 1. With this, the cooling capacity of the second evaporator 24 can be adjusted.
• the fixed throttle 50 and a plurality of three or more microvalves may be connected in parallel between the refrigerant inlet port 5 13 and the refrigerant outlet port 5 113. According to this, the flow rate of the refrigerant decompressed and expanded can be adjusted in multiple stages by opening and closing each of the plurality of microvalves.
• the refrigeration cycle device 10 of the present embodiment is an ejector type refrigeration cycle device mounted on a vehicle.
• the refrigeration cycle device 108 cools the interior of a vehicle compartment (not shown).
• the refrigeration cycle apparatus 10 includes a compressor 12, a radiator 14, an expansion valve 15, an ejector 16, a gas-liquid separator 60, an evaporator 62, and a bypass flow passage. 6 4, a check valve 6 6 and a valve device 6 8.
• the components of these refrigeration cycle devices 108 constitute a vapor compression refrigeration cycle.
• the expansion valve 15 depends on the degree of superheat of the refrigerant flowing from the evaporator 62.
• the gas-liquid separator 60 separates the refrigerant flowing out of the ejector 16 into a gas-phase refrigerant and a liquid-phase refrigerant.
• the gas phase refrigerant outlet side of the gas-liquid separator 60 is connected to the cooling medium suction side of the compressor 12.
• the liquid-phase refrigerant outlet side of the gas-liquid separator 60 is connected to the refrigerant inlet side of the evaporator 62.
• the gas-liquid separator 60 causes the separated gas-phase refrigerant to flow into the compressor 12 and the separated liquid-phase refrigerant to flow into the evaporator 62.
• the evaporator 62 cools the air and evaporates the refrigerant by heat exchange between the liquid-phase refrigerant flowing out of the gas-liquid separator 60 and the air sent into the vehicle interior.
• the refrigerant outlet side of the evaporator 62 is connected to the suction section 16 of the ejector 16. As a result, the evaporator 62 causes the evaporated refrigerant to flow into the suction section 16 ⁇ 2020/175 548 25 ⁇ (:171? 2020 /007724
• the bypass flow path 64 is a flow path that guides the refrigerant flowing out of the radiator 14 to the evaporator 62, bypassing the ejector 16 and the gas-liquid separator 60.
• One end of the bypass flow passage 64 is connected to the first connecting portion 63 which is located between the radiator 14 and the expansion valve 15 in the refrigerant flow passage.
• the other end of the bypass flow passage 64 is connected to a second connecting portion 65 located between the gas-liquid separator 60 and the upstream side of the evaporator 62 in the refrigerant flow passage.
• bypass flow passage 64 and the refrigerant flow passage from the second connection portion 65 to the suction portion 16 s, as a whole, are on the suction side where the refrigerant flows toward the suction portion 16 s Corresponds to the flow path.
• the check valve 66 is provided in the middle of the refrigerant flow path that connects the liquid-phase refrigerant side of the gas-liquid separator 60 and the second connecting portion 65.
• the check valve 6 6 allows the refrigerant flow from the liquid-phase cooling medium outlet of the gas-liquid separator 60 toward the second connection portion 65, and allows the liquid phase of the gas-liquid separator 60 from the second connection portion 6 5. Blocks the flow of refrigerant towards the refrigerant outlet.
• the valve device 68 is provided in the bypass flow passage 64.
• the valve device 68 includes a micro valve X I.
• the valve device 68 is a flow rate adjusting unit that adjusts the flow rate of the refrigerant flowing through the bypass flow channel 64 and reduces the pressure of the refrigerant flowing through the bypass flow channel 64. Adjusting the flow rate of the refrigerant includes setting the flow rate of the refrigerant to zero.
• the valve device 68 has a valve module ⁇ and a block body 70.
• the valve module ⁇ is connected to the block body 70.
• the structure of the valve module ⁇ is the same as that of the first embodiment.
• the block body 70 consists of the valve module ⁇ , the first pipe 71, and the second pipe
• the 7 2 is a connecting member for connecting with.
• the first pipe 71 constitutes a part of the bypass flow passage 64.
• the second pipe 72 constitutes another part of the bypass flow passage 64.
• a first flow path 7 3 and a second flow path 7 4 are formed inside the block body 70. Inside the block body 70, the first flow path 7 3 and the second flow path 7 4 are not in communication with each other.
• the block body 70 has a first opening 7 33 and a second opening 7 3 which communicate with the first flow path 73.
• the block body 70 is formed with a third opening 7 43 and a fourth opening 7 4 which communicate with the second flow path 74.
• the three openings 743 are arranged next to the first openings 733.
• the first pipe 71 is put into the second opening 73.
• the second pipe 7 2 is kneaded into the 4th opening 74.
• the flow path 7 13 inside the first pipe 7 1 communicates with the first communication hole 1 through the first flow path 7 3.
• the microvalve XI depressurizes the refrigerant when the bypass channel 64 is in the open state, and changes the opening of the channel when depressurizing the refrigerant, as in the second embodiment. Is possible.
• the valve device 68 can adjust the flow rate of the refrigerant flowing through the bypass flow passage 6 4 to any size between 0 and the maximum value, and at the same time, adjust the flow rate of the refrigerant flowing through the bypass flow passage 64. Can be depressurized
• the micro valve X1 When the flow rate of the refrigerant flowing into the nozzle section 163 of the ejector 16 is higher than the predetermined flow rate, the micro valve X1 is closed.
• the case where the flow rate of the refrigerant flowing into the nozzle section 16 3 of the ejector 16 is higher than the predetermined flow rate is, for example, the case where the rotation speed of the compressor 12 is higher than the predetermined rotation speed.
• the high temperature and high pressure refrigerant is discharged from the compressor 12 by the operation of the compressor 12.
• the high-temperature and high-pressure refrigerant discharged from the compressor 12 is radiated by the radiator 14.
• the refrigerant radiated by the radiator 14 is decompressed and expanded by the expansion valve 15. ⁇ 2020/175 548 27 ⁇ (:171? 2020 /007724
• the refrigerant that has flowed into the nozzle section 1 63 3 is injected under pressure from the nozzle section 1 63 and expanded under reduced pressure.
• the refrigerant injected from the nozzle part 163 flows into the boosting part 160 together with the refrigerant flowing from the suction part 166.
• the refrigerant flowing into the pressure booster 160 is pressurized and then flows out of the pressure booster 160.
• the refrigerant flowing out of the pressure booster 160 flows into the gas-liquid separator 60.
• the refrigerant flowing into the gas-liquid separator 60 is separated into a gas-phase refrigerant and a liquid-phase refrigerant.
• the separated gas-phase refrigerant is sucked into the compressor 12.
• the separated liquid-phase refrigerant flows into the evaporator 62.
• Evaporation of the refrigerant in the evaporator 62 cools the air inside the vehicle interior. As a result, the interior of the vehicle compartment is cooled.
• the refrigerant flowing out of the evaporator 62 flows into the suction chamber 16.
• the flow rate of the refrigerant flowing through the evaporator 62 depends on the boosting amount of the refrigerant in the boosting section 160.
• This boost amount depends on the flow rate of the refrigerant flowing through the ejector 16. Therefore, under the condition that the flow rate of the refrigerant flowing through the ejector 16 is small, the boosting amount may be small and the refrigerant may not flow through the evaporator 62.
• the amount of pressure increase is the same as the amount of pressure loss of the refrigerant due to flowing through the pipe, the refrigerant flow from the gas-liquid separator 60 to the suction portion 16 does not occur.
• the micro valve X1 is opened.
• the case where the flow rate of the refrigerant flowing into the nozzle portion 1 63 is smaller than the predetermined flow rate is, for example, the case where the rotation speed of the compressor 12 is smaller than the predetermined rotation speed.
• the predetermined rotation speed is set based on the rotation speed of the compressor 12 when the refrigerant does not flow to the evaporator 62 when the valve device 68 is closed.
• valve for opening and closing the bypass flow path 64 a mechanical valve that uses a pressure difference between the greenhouse and the flowing refrigerant is used.
• the micro valve X 1 is used as the valve mechanism of the valve device 68.
• the microvalve X I is easier to miniaturize compared to such a conventional mechanical valve. Therefore, as a valve mechanism of the valve device 68, the valve device 68 can be downsized as compared with the case where a conventional mechanical valve is used.
• the opening of the micro valve X1 is adjusted to adjust the evaporator.
• the flow rate of the refrigerant flowing through 62 can be adjusted. Therefore, the flow rate of the refrigerant flowing through the evaporator 62 can be adjusted to an appropriate flow rate according to the cooling load.
• the flow passage cross-sectional area of the valve device 68 when the flow passage cross-sectional area of the valve device 68 is fixed, the flow passage cutoff is performed so that the flow rate of the refrigerant flowing through the evaporator 62 becomes an appropriate flow rate under a predetermined condition. Area is set.
• the flow passage cross-sectional area of the valve device 68 can be changed under a wide range of conditions so that the flow rate of the refrigerant flowing through the evaporator 62 becomes an appropriate flow rate.
• the flow passage opening of the micro valve X1 can be changed to any size.
• the microvalve X I may be adapted to open and close only.
• the valve device when the flow rate of the refrigerant is smaller than the predetermined flow rate, the valve device
• valve device 68 may be opened under other conditions.
• the microvalve X 1 of the first embodiment is modified to have a failure detection function.
• the micro valve XI is equipped with a failure detection unit 50 as shown in Figs. 22 and 23. ⁇ 2020/175 548 29 ⁇ (:171? 2020 /007724
• the failure detection unit X50 includes a pledge circuit formed in the arm X126 of the intermediate layer X12.
• the bridge circuit contains four gauge resistors connected as shown in Figure 23.
• the failure detection unit 50 is a bridge circuit whose resistance changes according to the distortion of the arm X I 26, which corresponds to the diaphragm.
• 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.
• the wiring X 5 1 and the wiring 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 X 5 3 and X 5 4 are connected to the two output terminals on another diagonal of this bridge circuit. Then, a voltage signal of a level corresponding to the amount of distortion of the arm X I 2 6 is output from the wirings 5 3 and 5 4. As will be described later, this voltage signal is used as information for determining whether or not the micro valve X 1 is operating normally. The voltage signal output from the wiring 5 3 and X 5 4 is input to the 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 a voltage signal corresponding to the amount of strain 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 does not move ⁇ 2020/175 548 30 units (: 171-1? 2020 /007724
• the control device X 55 utilizes this fact to detect the presence/absence of a failure of the microvalve X 1. 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 correspondence relationship between the voltage signal level and the position in the first map may be determined in advance by experiments or the like. Further, the correspondence relationship between the position on the second map and the supplied power may be determined in advance by experiments or the like.
• control unit 5 5 uses the calculated electric power and the actual electric wiring X 6, X
• the control device 55 determines that the microvalve X 1 has failed and must not exceed the allowable value. If so, it is determined 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.
• control device X55 activates the notification device X56 that notifies the person in the vehicle.
• the control unit 5 5 turns on the warning lamp. ⁇ 2020/175 548 31 ⁇ (: 171-1? 2020/007724
• 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 micro valve 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 micro valve X 1 is out of order
• the control device 55 controls energization stop.
• 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 device X55 is It is possible to easily determine whether or not the valve X 1 has a failure.
• this voltage signal is a signal corresponding to the amount of distortion of the arm X1 26. Therefore, it is possible to easily determine whether or not there is a failure in the microvalve X 1, based on the relationship between the amount of electricity supplied to the microvalve X 1 from the electrical wiring X 6 and X 7 and this voltage signal.
• the 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 fixed throttle 23 is included in the refrigerant flow passage 31 of the flow passage forming member 30.
• the refrigerant passage 31 may not include the fixed throttle 23.
• the flow path of the microvalve X 1, for example, the first refrigerant hole X I 6 and the second refrigerant hole X I 7 function as a fixed throttle.
• the microvalve X 1 is in the closed state when the electricity supply from the electric wiring 6, X 7 to the microvalve X 1 is stopped.
• the microvalve X 1 may be in the open state when the electric wiring 6 or 7 stops energizing the microvalve X 1.
• the plurality of first ribs X I 2 3 and the plurality of second ribs X 1 2 4 are made of a semiconductor material.
• these members may be made of another material such as a metal material that generates heat by being supplied with electric current and expands due to the rise of its own temperature due to the generated heat.
• these members may be made of a shape memory material that deforms when the temperature changes. In this case, the drive part is displaced by its thermal deformation.
• the refrigeration cycle devices 10 and 10 are the expansion valve 1
• the refrigeration cycle devices 10 and 108 do not have to include the expansion valve 15.
• the nozzle portion 1 63 of the ejector 16 expands the refrigerant under reduced pressure.
• the shape and size of the micro valve X 1 are not limited to those shown in the above embodiment.
• the microvalve XI is capable of controlling a very small flow rate, and has a first refrigerant hole X 16 and a second refrigerant hole XI 7 that have hydraulic diameters that do not clog the fine dust existing in the flow path. Good.
• the ejector-type refrigeration cycle apparatus includes a compressor that compresses and discharges a refrigerant, and heat that dissipates the refrigerant that is discharged from the compressor. From the radiator, the nozzle section that ejects the refrigerant that flows out from the radiator, the suction section that absorbs the refrigerant by the flow of the refrigerant that ejects from the nozzle section, and the refrigerant that ejects from the nozzle section and the absorbing section I section.
• the ejector includes a pressure increasing unit that mixes the pressure of the sucked refrigerant to increase the pressure, and a flow rate adjusting unit that includes a valve component that adjusts the flow rate of the refrigerant flowing into the suction unit.
• the valve component is a drive that is displaced when its temperature changes, and a base in which a coolant chamber in which the coolant flows, a first coolant hole that communicates with the coolant chamber, and a second coolant hole that communicates with the coolant chamber are formed.
• the amplification part that amplifies the displacement due to the temperature change of the drive part, and the displacement amplified by the amplification part is transmitted and moves in the refrigerant chamber, so that the first refrigerant hole and the second refrigerant hole through the refrigerant chamber.
• a movable part that switches between communication with the hole and disconnection.
• the drive section When the drive section is displaced due to a change in temperature, the drive section biases the amplification section at the biased position, so that the amplification section is displaced with the hinge as the fulcrum and the amplification section is connected at the connection position between the amplification section and the movable section. Urges the movable part.
• the distance from the hinge to the connecting position is longer than the distance from the hinge to the biasing position.
• the Edekta refrigeration cycle apparatus includes a branch portion for branching the refrigerant flowing out from the radiator into one refrigerant and the other refrigerant, and a first evaporation for evaporating the refrigerant. And a second evaporator that evaporates the refrigerant.
• the branch part, the ejector, and the first evaporator are connected so that the refrigerant flows in the order of the nozzle part, the booster part, and the first evaporator.
• the branch part, the flow rate adjustment part, the second evaporator and the ejector are connected so that the other refrigerant flows in the order of the flow rate adjustment part, the second evaporator and the suction part.
• the flow rate adjusting unit adjusts the flow rate of the refrigerant flowing into the second evaporator and reduces the pressure of the refrigerant flowing into the second evaporator. In this way, the configuration of the second aspect can be adopted as the specific configuration of the first aspect.
• the flow rate adjusting unit has a flow channel forming member that forms a coolant flow channel including the fixed throttle.
• the valve component opens and closes the refrigerant flow path.
• the flow rate adjusting unit has a flow channel forming member that forms a coolant flow channel.
• the valve component is capable of opening and closing the refrigerant flow path, depressurizing the refrigerant flowing through the refrigerant flow path when the refrigerant flow path is in an open state, and changing the opening degree of the flow path when depressurizing the refrigerant. ..
• the configuration of the fourth aspect can be adopted as the specific configuration of the second aspect. According to this, by changing the opening of the flow path when the valve component depressurizes the refrigerant, the flow rate of the refrigerant flowing into the second evaporator can be set to an arbitrary value within the range from 0 to the maximum value. Can be adjusted.
• the flow rate adjusting unit includes a flow path forming component that forms a refrigerant flow path from a refrigerant inlet section of the flow rate adjusting section to a refrigerant outlet section of the flow rate adjusting section, and a refrigerant flow path. And an on-off valve for opening and closing.
• the refrigerant channel includes a fixed throttle and a bypass channel for guiding the refrigerant flowing from the refrigerant inlet section to the refrigerant outlet section by bypassing the fixed throttle.
• the valve component opens and closes the bypass passage, and depressurizes the refrigerant flowing through the bypass passage when the bypass passage is in the open state.
• the configuration of the fifth aspect can be adopted as the specific configuration of the second aspect. According to this, the valve component opens and closes the bypass passage, whereby the flow rate of the refrigerant flowing into the second evaporator can be adjusted stepwise at a flow rate greater than 0. ⁇ 2020/175 548 35 ⁇ (:171? 2020 /007724
• the ejector-type refrigeration cycle apparatus separates the refrigerant flowing out of the booster into a gas-phase refrigerant and a liquid-phase refrigerant, and the separated gas-phase refrigerant flows into the compressor.
• the vapor-liquid separator to be used the evaporator that evaporates the liquid-phase refrigerant separated by the gas-liquid separator and causes the evaporated refrigerant to flow into the suction section, and the refrigerant that has flowed out of the radiator to the ejector and the gas-liquid separator. And a bypass flow path leading to the evaporator.
• the flow rate adjustment unit adjusts the flow rate of the refrigerant flowing through the bypass flow passage and at the same time reduces the pressure of the refrigerant flowing through the bypass flow passage.
• the configuration of the sixth aspect can be adopted as the specific configuration of the first aspect.
• 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 from the valve component, it is possible to easily determine whether or not the valve component has a failure.
• the signal is a signal according to a distortion amount of the amplification section.
• the drive section generates heat when energized.
• the failure detection unit outputs a signal to a device that stops energizing the valve component when the valve component is defective. In this way, by stopping energization when a valve component fails, it is possible to enhance safety in the event of a failure.
• the failure detection unit outputs a signal to a device that operates a notification device that notifies a person when a valve component is broken. This allows people to know the failure of valve parts.
• the valve component is composed of a semiconductor chip. Therefore, the valve component can be made compact.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Thermal Sciences (AREA)
• Fluid Mechanics (AREA)
• Temperature-Responsive Valves (AREA)
• Jet Pumps And Other Pumps (AREA)
• Valve Housings (AREA)

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Citations (7)

• 2019
  • 2019-02-28 JP JP2019035228A patent/JP6958582B2/ja not_active Expired - Fee Related
• 2020
  • 2020-02-26 WO PCT/JP2020/007724 patent/WO2020175548A1/ja not_active Ceased

Patent Citations (7)

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