WO2020110840A1 - 流路切換弁 - Google Patents
流路切換弁 Download PDFInfo
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- WO2020110840A1 WO2020110840A1 PCT/JP2019/045332 JP2019045332W WO2020110840A1 WO 2020110840 A1 WO2020110840 A1 WO 2020110840A1 JP 2019045332 W JP2019045332 W JP 2019045332W WO 2020110840 A1 WO2020110840 A1 WO 2020110840A1
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- WIPO (PCT)
- Prior art keywords
- valve body
- pressure side
- main valve
- side slide
- ports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/0276—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using six-way valves
Definitions
- the present invention relates to a flow path switching valve used in a heat pump type cooling and heating system and the like, and more particularly to a flow path switching valve having improved valve body rigidity and improved sealing performance.
- a heat pump type cooling/heating system for a room air conditioner, a car air conditioner, etc. includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, an expansion valve, etc.
- a flow path switching valve such as a valve is provided.
- a flow path switching valve is used.
- the heat pump cooling/heating system 100 switches the operation mode (cooling operation and heating operation) with the flow path switching valve 180.
- the heat pump type heating and cooling system 100 is basically provided with a compressor 110, an outdoor heat exchanger 120, an indoor heat exchanger 130, a cooling expansion valve 150, and a heating expansion valve 160, and between them.
- a flow path switching valve 180 which is a flow path switching valve, is arranged.
- the flow path switching valve 180 is a valve having six ports pA, pB, pC, pD, pE, and pF.
- the respective devices are connected by a flow path formed by a conduit or the like.
- the high temperature and high pressure refrigerant is discharged from the compressor 110, and the discharged refrigerant is stored in the flow path switching valve 180. It is guided from the port pA to the outdoor heat exchanger 120 via the port pB.
- the refrigerant guided to the outdoor heat exchanger 120 exchanges heat with the outdoor air here and is condensed to be a high-pressure gas-liquid two-phase or liquid refrigerant and introduced into the cooling expansion valve 150.
- the high-pressure refrigerant is decompressed by the cooling expansion valve 150, and the decompressed low-pressure refrigerant is introduced into the indoor heat exchanger 130 from the port pE of the flow path switching valve 180 through the port pF.
- the refrigerant introduced into the indoor heat exchanger 130 is heat-exchanged (cooled) with the indoor air here to be evaporated, and becomes a low-temperature low-pressure refrigerant, and the compressor from the port pC to the port pD of the flow path switching valve 180. Returned to the suction side of 110.
- the heat pump type cooling and heating system 100 when the heating operation mode is selected, as shown in FIG. 9B, the high temperature and high pressure refrigerant is discharged from the compressor 110, and the discharged refrigerant is the flow path switching valve. It is guided to the indoor heat exchanger 130 from the port pA of 180 through the port pF.
- the refrigerant is heat-exchanged (heated) with the room air to be condensed, becomes a high-pressure gas-liquid two-phase or liquid refrigerant, and is introduced into the heating expansion valve 160.
- the high-pressure refrigerant is decompressed by the heating expansion valve 160, and the decompressed low-pressure refrigerant is introduced into the outdoor heat exchanger 120 from the port pC of the flow path switching valve 180 via the port pB.
- the refrigerant exchanges heat with the outdoor air to evaporate, and the low-temperature low-pressure refrigerant from the outdoor heat exchanger 120 is returned from the port pE of the flow path switching valve 180 to the suction side of the compressor 110 via the port pD. ..
- a slide type is known as a flow path switching valve incorporated in the above heat pump type cooling and heating system (for example, Patent Document 1).
- the slide type flow path switching valve described in Patent Document 1 has a structure that switches the flow paths by moving the main valve body while sliding. Further, there is a main valve body of the slide type flow path switching valve which is configured by combining two slide valve bodies, for example, a high pressure side slide valve body and a low pressure side slide valve body (for example, Patent Document 2). ).
- JP-A-8-170864 Japanese Patent Laid-Open No. 2018-044666
- flow path switching valves such as six-way switching valves that switch flow paths are subject to initial leakage and leakage (valve due to deterioration of durability). It is required to prevent the occurrence of (leakage).
- flow path switching valve having a high pressure side slide valve body and a low pressure side slide valve body, high pressure is applied to the high pressure side slide valve body. Therefore, the sealing surface of the high-pressure side slide valve body is likely to be distorted, which may cause valve leakage. Therefore, conventionally, there has been an urgent need to develop a flow path switching valve that prevents the occurrence of valve leakage.
- the present invention has been proposed in order to solve the above problems, the object is to increase the rigidity of the high-pressure side slide valve body, it is possible to prevent distortion of the sealing surface to prevent valve leakage, It is to provide a flow path switching valve that contributes to improvement in efficiency of a heat pump type cooling and heating system.
- the flow path switching valve of the present invention is characterized by having the following constituent elements (1) to (5).
- a main valve housing defining a main valve chamber
- a slide-type main valve body disposed in the main valve chamber so as to be movable in the axial direction.
- three ports are arranged side by side in the axial direction, and another three ports are arranged side by side in the axial direction on the opposite side of the three ports with the axis line in between.
- the ports communicating with each other are switched by moving the main valve body in the main valve chamber.
- the main valve body has a tubular high pressure side slide valve body and a low pressure side slide valve body slidably fitted inside the high pressure side slide valve body.
- a bridging portion that connects the inner peripheral surfaces facing each other in the direction orthogonal to the axis is provided.
- the present invention by increasing the rigidity of the high-pressure side slide valve body, it is possible to suppress the distortion of the sealing surface and prevent the valve leakage, and to obtain the flow path switching valve that contributes to the efficiency improvement of the heat pump type cooling and heating system. be able to.
- FIG. 1 is a vertical cross-sectional view showing a first embodiment of a flow path switching valve according to the present invention during a cooling operation.
- 1 is a vertical cross-sectional view showing a first embodiment of a flow path switching valve according to the present invention during heating operation.
- FIG. 2 is an enlarged vertical cross-sectional view of an essential part showing an enlarged part of the flow path switching valve shown in FIG. 1.
- FIG. 4 is an enlarged transverse cross-sectional view of a main part taken along the line AA of FIG. 3. The principal part expansion perspective view which expands and shows the principal part of the flow-path switching valve shown by FIG. Sectional drawing which follows the OU arrow line of FIG.
- FIG. 6 is an enlarged vertical cross-sectional view of an essential part showing an enlarged essential part of another example of the flow path switching valve shown in FIG. 1.
- FIG. 3 is a schematic configuration diagram showing (A) during cooling operation and (B) during heating operation in an example of a heat pump type cooling and heating system in which a flow path switching valve is used as a flow path switching valve.
- FIG. 1 and 2 are vertical cross-sectional views showing a first embodiment of a flow path switching valve according to the present invention.
- FIG. 1 is a diagram showing a cooling operation
- FIG. 2 is a diagram showing a heating operation.
- the description indicating the position, direction such as up and down, left and right, front and back is added for convenience according to the drawings in order to avoid complicated description, and is actually incorporated in a heat pump type cooling and heating system or the like. It does not necessarily indicate the position and direction in the state. Further, in each drawing, the gaps formed between the members and the separation distances between the members are larger than the dimensions of the respective constituent members in order to facilitate understanding of the invention and for convenience in drawing. Or it may be drawn smaller.
- the flow path switching valve 1 according to the first embodiment is of a slide type used as the flow path switching valve 180 in the heat pump type cooling and heating system 100 shown in FIGS. 9A and 9B described above, for example.
- the flow path switching valve 1 is basically a cylinder type flow path valve body 10 and a single electromagnetic four-way pilot valve as a pilot valve. 90 and.
- the flow path switching valve 1 of this embodiment is a six-way switching valve having six ports, and the six ports have the same reference numerals corresponding to the ports pA to pF of the flow path switching valve 180. It is attached.
- the flow path valve body 10 has a main valve housing 11 made of metal such as brass or stainless steel.
- a first working chamber 31 a first piston 21, a main valve chamber 12, a second piston 22, and a second working chamber 32 are sequentially arranged from one end side (upper end side).
- a spring-loaded packing whose outer peripheral portion is in pressure contact with the inner peripheral surface of the main valve housing 11 is attached so as to partition the main valve housing 11 in an airtight manner. ..
- the main valve housing 11 has a large-diameter body portion 11c.
- a thick disk-shaped upper coupling lid 11d is airtightly attached to the upper end opening of the body portion 11c.
- a central hole is provided in the upper connection lid 11d.
- a first piston portion 11a made of a small-diameter pipe member is airtightly fixed to the center hole of the upper coupling lid 11d by brazing, welding or the like (hereinafter referred to as brazing).
- the first piston 21 is arranged in the first piston portion 11a.
- a thick disk-shaped lower coupling lid 11e is airtightly attached to the lower end opening of the body portion 11c.
- the lower connecting lid 11e is also provided with a central hole.
- a second piston portion 11b made of a small-diameter pipe member is airtightly fixed to the central hole of the lower connection lid 11e by brazing or the like.
- the second piston 22 is arranged in the second piston portion 11b.
- a thin disk-shaped upper lid member 11A is hermetically fixed to the upper end of the first piston portion 11a of the main valve housing 11 by brazing or the like.
- the upper end lid member 11A defines a first working chamber 31 having a variable capacity.
- a thin disk-shaped lower end side lid member 11B is airtightly fixed by brazing or the like.
- the lower end side lid member 11B defines the second working chamber 32 having a variable capacity.
- Ports p11 and p12 are attached to the centers of the upper end lid member 11A and the lower end lid member 11B, respectively.
- the ports p11 and p12 are ports for introducing/exhausting a refrigerant that is a high-pressure fluid into the first working chamber 31 and the second working chamber 32.
- the main valve chamber 12 of the main valve housing 11 is a space provided inside the main valve housing 11.
- the main valve chamber 12 is provided with a total of 6 ports.
- a first main valve seat 13 made of, for example, metal is airtightly fixed to the inner periphery of the main valve housing 11 by brazing or the like at the center of the left part of the main valve chamber 12.
- the surface (right side) of the first main valve seat 13 is a flat valve seat surface.
- three ports which are pipe joints extending toward the left, are opened vertically (that is, lined up in the axis O direction) at substantially equal intervals. ..
- the three ports are port pB, port pA, and port pF sequentially from the upper end side.
- the two main valve seats 14 are airtightly fixed to the inner circumference of the main valve housing 11 by brazing or the like.
- the surface (left surface) of the second main valve seat 14 is a flat valve seat surface.
- three ports formed of pipe joints extending to the right are opened vertically (that is, lined up in the direction of the axis O) at substantially equal intervals. ..
- the three ports are port pC, port pD, and port pE sequentially from the upper end side.
- Ports pB, pA, and pF provided on the first main valve seat 13 and ports pC, pD, and port pE provided on the second main valve seat 14 oppose each other (with respect to the axis O). On the other side).
- the ports pA to pF provided in the first main valve seat 13 and the second main valve seat 14 are all set to have substantially the same diameter.
- a slide-type main valve body 15 is arranged inside the body portion 11c of the main valve housing 11 so as to be movable in the direction of the axis O (vertical direction).
- the main valve body 15 is a valve body having a racetrack-shaped annular sealing surface and a rectangular cross section. Both side surfaces (left surface and right surface) of the main valve body 15 slidably contact the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14, respectively.
- the dimensions of the main valve body 15 in the left-right direction and the front-rear direction are set to be equal to or slightly larger than the outer diameters of the first piston portion 11a and the second piston portion 11b of the main valve housing 11.
- the main valve body 15 is made of, for example, a synthetic resin, and has a high pressure side slide valve body 15A on the first main valve seat 13 side (left side) and a low pressure side slide valve body 15B on the second main valve seat 14 side (right side). It is made up of two parts.
- the high-pressure side slide valve body 15A is a tubular member that does not have a ceiling surface on the right side (second main valve seat 14 side).
- the high pressure side slide valve body 15A is arranged so as to surround the left side end portion (the front end portion on the side of the first main valve seat 13) of the low pressure side slide valve body 15B from the outside.
- an inner collar-shaped portion 15a is provided so as to protrude inward.
- Two adjacent ports (pB and pA or pA and pF) of the three ports that open on the valve seat surface of the first main valve seat 13 are selectively communicated with the inner flange portion 15a.
- the left end surface (the end surface on the side of the first main valve seat 13) of the inner flange portion 15a is an annular seal surface that slidably contacts the valve seat surface of the first main valve seat 13.
- a bridging portion 19 is provided on the inner peripheral surface of the high-pressure side slide valve body 15A to connect the inner peripheral surfaces facing each other in the direction orthogonal to the axis O of the main valve chamber 12. ..
- the bridging portion 19 is integrally formed with the high-pressure side slide valve body 15A.
- the bridging portion 19 extends in a direction orthogonal to the axial direction of the main valve chamber 12 and in a direction parallel to the seat surface of the first main valve seat 13, and the inner peripheral surfaces of the high pressure side slide valve body 15A facing each other are opposed to each other. I am connected.
- FIG. 4 is an enlarged transverse cross-sectional view of a main part taken along the line AA of FIG.
- the bridging portion 19 has two openings by providing two openings communicating with two adjacent ports at the base end of the high-pressure side slide valve body 15A. It is formed from the end face portion sandwiched by the arcs of the part. That is, the bridging portion 19 is provided at the base end of the high-pressure side slide valve body 15A.
- each opening formed at the base end of the high-pressure side slide valve body 15A has the same shape as the connected port, but the shape of the opening is different from that of the port as long as the required flow rate can be secured. But it is okay.
- the low pressure side slide valve body 15B is provided with a convex portion 15b protruding toward the high pressure side slide valve body side.
- the convex portion 15b is formed integrally with the low pressure side slide valve body 15B so as to have an outer diameter substantially the same as or slightly smaller than the inner diameter of the high pressure side slide valve body 15A.
- a high-pressure side U-turn passage 16A is defined in a space surrounded by the inner peripheral surface of the high-pressure side slide valve body 15A and the convex portion 15b.
- the high-pressure side U-turn passage 16A selectively communicates two adjacent ports (pB and pA or pA and pF) among the three ports that open on the valve seat surface of the first main valve seat 13. It can be done.
- a relatively high pressure fluid is introduced into the high pressure side U-turn passage 16A.
- the low pressure side U-turn passage 16B is opened on the right side of the low pressure side slide valve body 15B (the side opposite to the high pressure side slide valve body 15A).
- the low-pressure side U-turn passage 16B selectively connects two adjacent ports (pC and pD, or pD and pE) among the three ports that open on the valve seat surface of the second main valve seat 14. It consists of a bowl-shaped depression of a size that can be made.
- a relatively low pressure fluid is introduced into the low pressure side U-turn passage 16B.
- two of the three ports are selectively communicated via the high pressure side U-turn passage 16A.
- two ports out of the other three ports are selectively made to communicate with each other via the low-voltage side U-turn passage 16B, and different from the other one port out of the three ports.
- the other one of the three ports is selectively communicated with the other of the three ports through the main valve housing 11.
- the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B are slightly movable in the left-right direction with respect to each other, and are also vertically movable integrally.
- the left-right direction is a direction perpendicular to the axis O
- the up-down direction is the axis O direction.
- a step portion inner peripheral step portion formed on the right end side inner periphery of the high pressure side slide valve body 15A and a step portion (outer peripheral step portion) formed on the outer periphery of the convex portion 15b of the low pressure side slide valve body 15B.
- the O-ring 18 as an annular seal member is interposed between the first and second parts.
- the O-ring 18 is arranged between the high-pressure side U-turn passage 16A and the main valve chamber 12.
- the high-pressure side slide valve body 15A shown in FIG. 5 is provided with the outer flange portion 15c for improving the operational stability, the outer flange portion 15c may be omitted as shown in FIG.
- the O-ring 18 seals the high-pressure side U-turn passage 16A and the main valve chamber 12.
- a high-pressure fluid (refrigerant) is introduced from a port (discharge-side high-pressure port) pA to the inside of the O-ring 18 through the high-pressure-side U-turn passage 16A.
- a seal member such as a lip seal may be used instead of the O-ring 18, and the external shape of the O-ring or the like is not limited to a circle and may be a quadrangle.
- the area Sb on the right side of the high-pressure side slide valve body 15A is the left side when viewed in the left-right direction (direction orthogonal to the first main valve seat 13). It is set to be larger than the area Sa on the side (first main valve seat 13 side).
- the area Sb is a projected area inside the outer diameter of the O-ring 18 with respect to a plane perpendicular to the left-right direction.
- the area Sa is a projected area (inner collar portion 15a) inside the annular seal surface on the first main valve seat 13 side with respect to a plane perpendicular to the left-right direction (direction orthogonal to the valve seat surface of the first main valve seat 13). Is approximately the same as the projected area of the high pressure side slide valve body 15A (the right side surface of the high pressure side slide valve body 15A) does not receive pressure in the left direction.
- the sliding surface of the bridging portion 19 is a sealing surface, the shape of the area Sa is annular. However, when the bridging portion 19 is lifted from the valve seat surface, the area Sa is the inner flange portion 15a. Inside.
- the pressure received from the high-pressure refrigerant in the high-pressure side U-turn passage 16A causes the right side surface of the low-pressure side slide valve body 15B to move.
- the (annular sealing surface) is pressed against the valve seat surface of the second main valve seat 14.
- the right surface of the low-pressure side slide valve body 15B is the second main surface due to the pressure difference between the pressure received from the high-pressure refrigerant flowing in the high-pressure side U-turn passage 16A and the pressure received from the low-pressure refrigerant flowing in the low-pressure side U-turn passage 16B. It is pressed against the valve seat surface of the valve seat 14.
- the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B are in opposite directions (separation directions). You may make it arrange
- the biasing member there are ring-shaped leaf springs and compression coil springs. By the urging force of the urging member, it is possible to press (press) the left surface (the annular seal surface) of the high-pressure side slide valve body 15A against the valve seat surface of the first main valve seat 13.
- a reinforcing pin 15d for maintaining the shape is installed in the front-rear direction in the approximate center of the low pressure side U-turn passage 16B of the low pressure side slide valve body 15B (FIGS. 3, 6, and FIG. See also 7).
- recessed surfaces 15e are formed on the upper and lower surfaces of (the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B constituting the main valve body 15).
- a support plate portion 25c of (a connecting plate 25A, 25B of) a connecting body 25 described later is fitted into the recessed surface 15e (with a slight gap in the left-right direction).
- the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B integrally move in the direction of the axis O, so that the cooling position (upper end position) shown in FIG. 1 and the heating shown in FIG.
- the position (lower end position) can be selectively set.
- the main valve body 15 in the cooling position (upper end position) opens the port pF, and connects the port pB and the port pA through the high pressure side U-turn passage 16A of the high pressure side slide valve body 15A.
- the main valve body 15 opens the port pE, and connects the port pC and the port pD to each other through the low pressure side U-turn passage 16B of the low pressure side slide valve body 15B.
- the main valve body 15 at the heating position opens the port pB, and connects the port pA and the port pF via the high pressure side U-turn passage 16A of the high pressure side slide valve body 15A.
- the main valve body 15 opens the port pC, and connects the port pD and the port pE to each other via the low pressure side U-turn passage 16B of the low pressure side slide valve body 15B.
- the high-pressure side slide valve body 15A is located directly above two ports (pB and pA or pA and pF) out of the three ports except when moving.
- the low-pressure side slide valve body 15B is located immediately above two ports (pC and pD, or pD and pE) of the three ports except during movement.
- These slide valve bodies 15A and 15B are respectively pressed to the left and right by the pressure from the high-pressure refrigerant introduced into the high-pressure side U-turn passage 16A in the main valve body 15, and the first main valve seat 13 and the second main valve It is pressed against the valve seat surface of the seat 14.
- the first piston 21 and the second piston 22 are connected by a connecting body 25 so that they can move integrally.
- the high pressure side slide valve body 15A and the low pressure side slide valve body 15B of the main valve body 15 are slightly slidable in the left-right direction and are prevented from moving in the front-rear direction in the connecting body 25. It is fitted and supported.
- the connecting body 25 is made of a pair of plate members having the same size and the same shape, which are manufactured by, for example, press molding.
- Each plate member of the connecting body 25 is along a left-right direction (direction orthogonal to the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14), that is, a plane orthogonal to the valve seat surface. It is arranged so as to be parallel to.
- a pair of plate members are arranged to face each other in the front-rear direction, and the main valve body 15 is sandwiched between the pair of plate members in the front-rear direction.
- the plate material arranged on the front side of the main valve body 15 will be referred to as a connecting body 25A
- the plate material arranged on the rear side of the main valve body 15 will be referred to as a connecting body 25B.
- the connecting bodies 25A and 25B are vertically long and symmetrical with respect to a center line (symmetry line) extending from the center in the front-rear direction. It is configured by a rectangular plate material (here, the same width over the entire length in the vertical direction).
- a support member 25c is formed at substantially the center (up and down direction) of the coupling bodies 25A and 25B so as to engage and support the front side portion or the rear side portion of the main valve body 15 in an integrally movable manner in the axis O direction. ing. As shown in FIGS.
- the support member 25c has a shape along the outer periphery (front surface and upper and lower surface, or rear surface and upper and lower surface) of the main valve body 15, that is, a substantially concave cross section.
- the width of the support member 25c in the left-right direction is set to be slightly smaller than the width of the recessed surface 15e provided on the upper and lower surfaces of the main valve body 15.
- connection member 25a extending to the first piston 21 or the second piston 22 is connected to the upper and lower sides of the support member 25c in each of the connecting bodies 25A and 25B.
- the connecting member 25a is formed into a step shape or a crank shape by bending or the like.
- the connecting member 25a is provided with an offset plate portion 25aa and a contact plate portion 25ab from the support member 25c side.
- Six offset plate portions 25aa of the connecting member 25a in the front coupling body 25A are opened on the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14 in front of the axis O, particularly when viewed in the left-right direction. Is located at a position avoiding the ports pA to pF on the front side (in other words, a position offset forward from the six ports pA to pF).
- the offset plate portion 25aa of the connecting member 25a in the rear coupling body 25B is located on the rear side of the axis O, particularly on the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14 when viewed in the left-right direction. It is arranged at a position avoiding the opened six ports pA to pF toward the rear side (in other words, a position offset rearward from the six ports pA to pF).
- the offset plate portion 25aa of the connecting member 25a in the pair of connecting bodies 25A and 25B has the ports pB and pC that are opened on the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14, respectively. It is located so as not to hinder the flow of the refrigerant flowing through pE and pF (see particularly FIG. 6). More specifically, at the cooling position (upper end position) shown in FIG. 1, the offset plate portion 25aa is positioned so as not to hinder the flow of the refrigerant in the ports pF and pE located on the lower side, and the heating shown in FIG. At the position (lower end position), the offset plate portion 25aa is positioned so as not to hinder the flow of the refrigerant in the ports pB and ports pC located on the upper side.
- the contact plate portion 25ab of the connecting member 25a in the connecting body 25A is in contact with the contact plate portion 25ab of the connecting member 25a in the connecting body 25B.
- These contact plate portions 25ab are portions close to the first piston 21 or the second piston 22, and the ports pA to pF opened on the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14, respectively. It is the part that does not wrap.
- the contact plate portion 25ab may be provided with irregularities or the like (alignment portion) for mutually aligning the coupling bodies 25A and 25B that are arranged to face each other. Good.
- Mounting legs 25b are provided at the upper and lower ends of the connecting member 25a of the connected bodies 25A and 25B.
- the mounting leg portion 25b is formed by bending approximately 90° toward the opposite side (the direction in which the support member 25c having a substantially uneven cross-section is formed) from the side of the connecting bodies 25B and 25A that are arranged to face each other.
- a screw hole 29 for inserting the bolt 30 is formed through the mounting leg portion 25b.
- the bolt 30 shown in FIG. 6 is for connecting the connecting bodies 25A and 25B to the first piston 21 or the second piston 22.
- the connecting plates 25A and 25B are made of plate materials having the same size and shape, it is possible to arrange the two connecting plates 25A and 25B so as to face each other in the front-rear direction. it can. Further, the contacting plate portions 25ab of the connecting members 25a of the connecting plates 25A and 25B can be combined and arranged in opposite directions (more specifically, upside down) so as to be in contact with each other.
- the high pressure side slide valve body 15A and the low pressure side slide valve body of the main valve body 15 are interposed between the support members 25c of the connecting plates 25A and 25B (spaces having a substantially rectangular shape in a side view) via the bolts 30.
- the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B are slightly slidable in the left-right direction and are substantially prevented from moving in the front-rear direction. 25 can be fitted (see in particular FIG. 7).
- the main valve body 15 fitted and supported by the connecting plates 25A, 25B has an upper portion of the supporting member 25c having a concave cross section in the connecting plates 25A, 25B as the first and second pistons 21, 22 reciprocate. Alternatively, it is pushed to the lower portion (a rectangular flat surface that is wide in the left-right direction). That is, the upper and lower surfaces of the high pressure side slide valve body 15A and the low pressure side slide valve body 15B are pressed.
- the connecting body 25 is exemplified by a pair of plate members (connecting plates 25A and 25B) having the same size and the same shape.
- one connecting member is used as the connecting body.
- 25 may be configured.
- a four-way pilot valve 90 as a pilot valve has a valve case 92, and a suction element 95, a compression coil spring 96, and a plunger 97 are sequentially arranged in the valve case 92 from the base end side. It is distributed in series.
- the valve case 92 is a cylindrical straight pipe having an electromagnetic coil 91 fitted and fixed to the outer circumference of the base end side (left end side).
- valve case 92 The left end of the valve case 92 is hermetically joined to the flange portion (outer peripheral terrace) of the attractor 95 by welding or the like, and the attractor 95 is attached to a cover case 91A that covers the outer periphery of the electromagnetic coil 91 for energizing and exciting. It is fastened and fixed by a bolt 92B.
- a lid member 98 with a filter is hermetically attached to the opening at the right end of the valve case 92 by welding, brazing, caulking or the like.
- the lid member 98 has a thin tube insertion port for introducing high-pressure refrigerant.
- a region surrounded by the lid member 98, the plunger 97, and the valve case 92 is a valve chamber 99.
- a high-temperature and high-pressure refrigerant is introduced into the valve chamber 99 from the port pA via the high-pressure thin tube #a that is hermetically inserted into the thin tube insertion port of the lid member 98.
- a valve seat 93 having an inner end surface that is a flat valve seat surface is hermetically joined by brazing or the like between the plunger 97 and the lid member 98 in the valve case 92.
- On the valve seat surface (inner end surface) of the valve seat 93 three ports are opened side by side at a predetermined interval, and thin tubes #b, #c, and #d are connected to each port. ..
- the thin tube #b is connected to the first working chamber 31 of the flow path valve body 10
- the thin tube #c is connected to the port pD
- the thin tube #d is connected to the second working chamber 32 of the flow path valve body 10. ing.
- the plunger 97 which is arranged so as to face the suction element 95, is basically cylindrical, and is disposed slidably in the valve case 92 in the axial direction (direction along the center line of the valve case 92).
- the valve element 94 is a member that selectively communicates between adjacent ports of the three ports opened on the valve seat surface of the valve seat 93 to switch the communication state between the ports.
- the valve body 94 slides on the valve seat surface of the valve seat 93 as the plunger 97 moves in the left-right direction while being in contact with the valve seat surface of the valve seat 93.
- the compression coil spring 96 is compressed between the suction element 95 and the plunger 97 and biases the plunger 97 in the direction of separating the plunger 97 from the suction element 95 (rightward in FIGS. 1 and 2 ).
- the left end of the valve seat 93 serves as a stopper that prevents the plunger 97 from moving to the right. Needless to say, other configurations can be adopted as the configuration of this stopper.
- the high-pressure fluid flowing into the port (discharge-side high-pressure port) pA is introduced into the second working chamber 32 via the high-pressure thin tube #a ⁇ valve chamber 99 ⁇ thin tube #d ⁇ port p12. To be done. Further, the high-pressure fluid in the first working chamber 31 flows to the port p11 ⁇ capillary tube #b ⁇ port b ⁇ recess 94a ⁇ port c ⁇ capillary tube #c ⁇ port (suction side low-pressure port) pD and is discharged.
- the plunger 97 is attracted by the suction element 95 to the position where its left end contacts the suction element 95 (the compression coil spring 96
- the valve body 94 is moved by being attracted (against the biasing force).
- the high-pressure fluid flowing into the port (discharge-side high-pressure port) pA is introduced into the first working chamber 31 via the high-pressure thin tube #a ⁇ valve chamber 99 ⁇ thin tube #b ⁇ port p11.
- the high pressure fluid in the second working chamber 32 flows to the port p12 ⁇ the thin tube #d ⁇ the thin tube #c ⁇ the port (suction side low pressure port) pD and is discharged.
- the main valve body 15 of the flow path valve body 10 moves from the heating position to the cooling position and the flow path is switched.
- the energization of the electromagnetic coil 91 is turned on, the main valve body 15 of the flow path valve body 10 shifts from the cooling position to the heating position, and the flow path switching is performed as described above.
- the flow path switching valve 1 of the present embodiment by switching the energization of the electromagnetic four-way pilot valve 90 ON/OFF, the high pressure fluid (port which is a high pressure portion) flowing in the flow path switching valve 1 is switched.
- the main valve body 15 can be moved in the main valve chamber 12 by utilizing the differential pressure between the fluid flowing through pA) and the low pressure fluid (fluid flowing through the port pD which is the low pressure portion).
- the communication state between the ports provided in total 6 in the main valve housing 11 is switched. Therefore, in the heat pump type cooling and heating system 100 as shown in FIGS. 9A and 9B, the heating operation can be switched to the cooling operation and the cooling operation can be switched to the heating operation.
- the high-temperature and high-pressure refrigerant is introduced into the second working chamber 32, and the high-pressure refrigerant is discharged from the first working chamber 31. Therefore, in the main valve chamber 12, the pressure in the second working chamber 32 becomes higher than the pressure in the first working chamber 31, and as shown in FIG. 1, the first and second pistons 21, 22 and the main valve body 15 are When moving upward, the connecting body 25 is abutted and locked by the upper connecting plate 11d, and the main valve body 15 takes the cooling position (upper end position).
- the port pA and the port pB communicate with each other through the high pressure side U-turn passage 16A
- the port pC and the port pD communicate with each other through the low pressure side U-turn passage 16B
- the port pE and the port pF communicate with each other. It communicates through the chamber 12.
- the cooling operation is performed in the heat pump type cooling and heating system 100.
- the first working chamber 31 is communicated with the port pA which is the discharge side high pressure port via the four-way pilot valve 90. Further, the second working chamber 32 is communicated with the port pD which is the suction side low pressure port.
- the high temperature and high pressure refrigerant is introduced into the first working chamber 31, and the high temperature and high pressure refrigerant is discharged from the second working chamber 32. Therefore, in the main valve chamber 12, the pressure in the first working chamber 31 becomes higher than the pressure in the second working chamber 32, and as shown in FIG. 2, the first and second pistons 21, 22 and the main valve body 15 are It moves downward, the connecting body 25 is abutted and locked by the lower connecting plate 11e, and the main valve body 15 takes the heating position (lower end position).
- the ports pA and pF communicate with each other through the high pressure side U-turn passage 16A
- the ports pE and pD communicate with each other through the low pressure side U-turn passage 16B
- the ports pC and pB communicate with each other. It communicates through the chamber 12.
- the heating operation is performed in the heat pump type cooling and heating system 100.
- the cylindrical main valve housing 11 that defines the main valve chamber 12 and the axial direction in the main valve chamber 12 are provided.
- a slide-type main valve body 15 movably arranged in the main valve chamber 12, and three ports are opened in the main valve chamber 12 so as to be arranged in the axial direction and opposite to the axes of the three ports.
- another three ports are arranged side by side in the axial direction and opened, and by moving the main valve body 15 in the main valve chamber 12, the ports communicating with each other are switched, and the main valve body 15 has a cylindrical high pressure.
- a side slide valve body 15A and a low-pressure side slide valve body 15B slidably fitted inside the high-pressure side slide valve body 15A, and on that side, the high-pressure side slide valve body 15A faces each other.
- a bridging portion 19 is provided which extends in a direction orthogonal to the axial direction of the main valve chamber 12 and connects the inner peripheral surfaces facing each other of the high-pressure side slide valve body 15A.
- the bridging portion 19 that extends in the direction orthogonal to the axial direction of the main valve chamber 12 is provided on the inner peripheral surfaces of the high pressure side slide valve body 15A that face each other.
- the rigidity of the high-pressure side slide valve body 15A can be increased. Therefore, even if the pressure from the high-pressure fluid is applied to the inner peripheral surface of the high-pressure side slide valve body 15A and the tip side of the high-pressure side slide valve body 15A tries to spread outward, rigidity is provided by providing the bridging portion 19. In the high-pressure side slide valve body 15A having a high temperature, the amount of deformation can be suppressed to a small extent.
- the distortion of the sealing surface of the high-pressure side slide valve body 15A can be suppressed, the sealing performance can be improved, and the main valve body 15 can be prevented from leaking. As a result, the efficiency of the heat pump cooling/heating system 100 is further improved.
- the bridging portion 19 is provided at the base end portion of the high pressure side slide valve body 15A, the portion near the sealing surface of the high pressure side slide valve body 15A is provided. It has increased rigidity. Therefore, it is possible to efficiently suppress the distortion of the sealing surface, improve the sealing performance, and prevent the valve leakage of the main valve body 15.
- the two opening portions that communicate with each of the two adjacent ports are provided on the end surface of the high pressure side slide valve body 15A.
- the bridging portion 19 is formed from the end face portion sandwiched by the arcs. Therefore, the bridging portion 19 does not hinder the flow of the high-pressure fluid passing through the port. Therefore, the high pressure refrigerant can smoothly flow through the high pressure side U-turn passage 16A, and the pressure loss can be reduced.
- the flow path switching valve 1 by moving the main valve body 15 in the main valve chamber 12, two of the three ports are connected via the high pressure side U-turn passage 16A.
- the ports are selectively communicated with each other, two ports of the other three ports are selectively communicated with each other via the low-voltage U-turn passage 16B, and the other one of the three ports is connected.
- One port and another one of the other three ports communicate with each other through the inside of the main valve housing 11 so that a plurality of communication states can be selectively obtained.
- the first main valve seat 13 and the second main valve seat 14 provided with ports and the main valve body 15 are provided as compared with the flow path switching valve using the conventional slide type main valve body. It can be shortened in the direction of the axis O. Therefore, it becomes easy to secure the surface accuracy and flatness of the valve seat surfaces of the first main valve seat 13 and the second main valve seat 14 and the seal surface of the main valve body 15. As a result, it is possible to prevent the valve switching valve 1 from leaking, to stably flow the high-pressure refrigerant into the high-pressure side U-turn passage 16A, and to contribute to the reduction of pressure loss.
- the fluid (for example, low-pressure refrigerant) flowing in the flow path valve body 10 is caused to flow through the low-pressure side U-turn passage 16B, and the fluid (for example, medium-pressure refrigerant) flows in the main valve chamber 12 to the left and right. Since it is made to flow in the direction (straight), this also makes it possible to reduce the pressure loss. Moreover, in the flow path switching valve 1, since the O-ring 18 which is an annular seal member is provided between the high pressure side slide valve body 15A and the convex portion 15b of the low pressure side slide valve body 15B, the main part is more reliably provided. The valve leakage of the valve body 15 can be suppressed.
- the flow path switching valve 1 when used in an environment in which a high-temperature and high-pressure refrigerant and a low-temperature and low-pressure refrigerant flow, such as a heat pump type cooling and heating system, the high-pressure side through which the high-temperature high-pressure refrigerant flows
- the U-turn passage 16A and the low-pressure side U-turn passage 16B through which the low-temperature low-pressure refrigerant flows can be provided far apart from each other without the metal main valve seat.
- the amount of heat exchange (that is, heat loss) between the high-temperature and high-pressure refrigerant and the low-temperature and low-pressure refrigerant is significantly larger than that of the conventional one in which they are flown in close proximity via the metal main valve seat. Can be reduced to As a result, there is an effect that the efficiency of the heat pump cooling and heating system 100 can be further improved.
- the high pressure side slide valve body 15A and the low pressure side are arranged so that the high pressure side U-turn passage 16A and the low pressure side U-turn passage 16B face in opposite directions.
- the slide valve body 15B and the slide valve body 15B are arranged so as to be aligned with the back surface. Therefore, the high-pressure fluid introduced between the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B causes the high-pressure side slide valve body 15A and the low-pressure side slide valve body 15B to pass through the first main valve seat 13 and the first main valve seat 13 respectively. 2 It will be pressed against the main valve seat 14.
- the bridging portion 19 is provided at the base end portion, the pressure of the high pressure fluid acts on the bridging portion 19, and the high pressure side slide valve body 15A.
- the left side of is strongly pressed against the first main valve seat 13.
- the action of such a high-pressure fluid also improves the sealing property of the main valve body 15 and can prevent the valve leakage.
- heat loss between the high-temperature high-pressure refrigerant and the low-temperature low-pressure refrigerant can be reduced, so that the efficiency of the heat pump cooling and heating system 100 is further improved.
- the bridging portion 19 is formed with a curved surface portion 19a having a dome-shaped cross section which is convexly curved toward the low pressure side slide valve body 15B. Has been done.
- the flow path switching valve 1 has the following unique actions and effects. That is, in the second embodiment, the bridging portion 19 is formed with the curved surface portion 19a.
- the curved surface portion 19a has a dome-shaped cross section that is convexly curved toward the low-pressure side slide valve body 15B. Therefore, it has an inclined surface that curves along the shape of the high-pressure side U-turn passage 16A. Therefore, the bridging portion 19 does not interfere with the flow of the high pressure fluid introduced into the high pressure side U-turn passage 16A. As a result, the high-pressure fluid can smoothly flow in the high-pressure side U-turn passage 16A, and the pressure loss can be reduced.
- the bridging portion 19 is provided in the high pressure side slide valve by providing two opening portions communicating with two adjacent ports on the end surface of the high pressure side slide valve body 15A. Although it is formed integrally with the body 15A, it is not limited to this.
- the member forming the bridging portion 19 may be provided as a member separate from the high pressure side slide valve body 15A, and the member forming the bridging portion 19 may be attached to the high pressure side slide valve body 15A.
- the configuration, shape, size, etc. of the bridging portion 19 can be appropriately changed.
- the bridging portion 19 may be composed of a plurality of members.
- the configuration in which the four-way pilot valve 90 is used to drive the main valve body 15 in the main valve chamber 12 has been described.
- a motor is used instead of the four-way pilot valve 90.
- the main valve body 15 may be driven in the chamber 12.
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Abstract
Description
(1)主弁室を画成する主弁ハウジングと、
(2)前記主弁室内に軸線方向に移動可能に配在されたスライド式の主弁体と、を備える。
(3)前記主弁室には、軸線方向に並べて3個のポートを開口するとともに、軸線を挟んで前記3個のポートの反対側に別の3個のポートを軸線方向に並べて開口して、前記主弁室内で前記主弁体を移動させることにより連通するポート間を切り換える。
(4)前記主弁体は、筒状の高圧側スライド弁体と、前記高圧側スライド弁体の内側に摺動自在に嵌合される低圧側スライド弁体とを有する。
(5)前記高圧側スライド弁体の対向する内周面には、前記軸線と直交する方向に向き合う内周面同士を繋ぐかけ渡し部を設ける。
[構成]
第1の実施形態に係る流路切換弁1は、例えば前述した図9(A)、(B)に示されるヒートポンプ式冷暖房システム100における流路切換弁180として用いられるスライド式のものである。
流路弁本体10は、真鍮あるいはステンレス等の金属製とされた主弁ハウジング11を有する。この主弁ハウジング11には、一端側(上端側)から順次、第1作動室31、第1ピストン21、主弁室12、第2ピストン22、及び第2作動室32が配在されている。前記第1及び第2ピストン21、22にはいずれにも、主弁ハウジング11を気密的に仕切るべく、主弁ハウジング11の内周面にその外周部が圧接するばね付きパッキンが取り付けられている。
図1及び図2に示すように、パイロット弁としての四方パイロット弁90は、弁ケース92を有し、弁ケース92に、基端側から順次、吸引子95、圧縮コイルばね96、プランジャ97が直列的に配在されている。弁ケース92は、基端側(左端側)外周に電磁コイル91が外嵌固定された円筒状のストレートパイプからなる。弁ケース92の左端部は、吸引子95の鍔状部(外周段丘部)に溶接等により密封接合されており、吸引子95は、通電励磁用の電磁コイル91の外周を覆うカバーケース91Aにボルト92Bにより締結固定されている。
上記した如くの構成とされた四方パイロット弁90においては、電磁コイル91への通電OFF時には、図1に示される如くに、プランジャ97は圧縮コイルばね96の付勢力により、その右端が弁座93に当接する位置まで押し動かされて、弁体94が弁座93の弁シート面に開口された3個のポートのうちの隣り合うポート間を連通させる。
ヒートポンプ式冷暖房システム100を暖房運転から冷房運転へ切り換える時、及び、冷房運転から暖房運転への切り換える時の流路弁本体10の動作について説明する。図2に示すように、主弁ハウジング11内に配在された主弁体15が暖房位置(下端位置)にあるとき、四方パイロット弁90を介して、第2作動室32を吐出側高圧ポートであるポートpAに連通させる。また、第1作動室31を吸入側低圧ポートであるポートpDに連通させる。
以上の説明から理解されるように、第1の実施形態に係る流路切換弁1においては、主弁室12を画成する筒状の主弁ハウジング11と、主弁室12内に軸線方向に移動可能に配在されたスライド式の主弁体15と、を備え、主弁室12には、軸線方向に並べて3個のポートを開口するとともに、3個のポートの軸線に対して反対側に、別の3個のポートを軸線方向に並べて開口して、主弁室12内で主弁体15を移動させることにより連通するポート間を切り換え、主弁体15は、筒状の高圧側スライド弁体15Aと、高圧側スライド弁体15Aの内側に摺動自在に嵌合される低圧側スライド弁体15Bとを有しており、その上で、高圧側スライド弁体15Aの対向する内周面に、主弁室12の軸線方向と直交する方向に延びて高圧側スライド弁体15Aの対向する内周面同士を繋ぐかけ渡し部19を設けている。
第2の実施形態に係る流路切換弁1では、基本的な構成要素は上記第1の実施形態のそれと同一である。そのため、同一の構成要素に関しては同一符号を付して説明は省略し、相違点のみを説明する。
図8に示すように、第2の実施形態に係る流路切換弁1では、かけ渡し部19に、低圧側スライド弁体15Bに向かって凸状にカーブした断面ドーム状の曲面部19aが形成されている。
第2の実施形態に係る流路切換弁1では、次のような独自の作用及び効果がある。すなわち、第2の実施形態ではかけ渡し部19に曲面部19aを形成している。曲面部19aは、低圧側スライド弁体15Bに向かって凸状にカーブした断面ドーム状を成す。そのため、高圧側Uターン通路16Aの形状に沿ってカーブする傾斜面を有することになる。従って、高圧側Uターン通路16Aに導入される高圧流体の流れを、かけ渡し部19が阻害するおそれが無い。これにより、高圧流体が高圧側Uターン通路16Aをスムーズに流れることができ、圧力損失の低減化が図ることができる。
以上説明した実施形態は、本発明の実施形態の一例として提示したもので、本発明の実施形態は、その他の様々な形態で実施可能である。例えば、第1及び第2の実施形態では、隣接する2つのポートのそれぞれに連通する2つの開口部を、高圧側スライド弁体15Aの端面に設けることにより、かけ渡し部19を高圧側スライド弁体15Aに対して一体的に成形したが、これに限らない。
10 流路弁本体
11 主弁ハウジング
11A 上端側蓋部材
11B 下端側蓋部材
12 主弁室
13 第1主弁座
14 第2主弁座
15 主弁体
15A 高圧側スライド弁体
15B 低圧側スライド弁体
15a 内鍔状部
15b 凸部
16A 高圧側Uターン通路
16B 低圧側Uターン通路
18 Oリング
19 かけ渡し部
19a 曲面部
21 第1ピストン
22 第2ピストン
25 連結体
25A、25B 連結板
31 第1作動室
32 第2作動室
90 四方パイロット弁
pA、pB、pC、pD、pE、pF ポート
100 ヒートポンプ式冷暖房システム
Claims (7)
- 主弁室を画成する主弁ハウジングと、
前記主弁室内に軸線方向に移動可能に配在されたスライド式の主弁体と、を備え、
前記主弁室には、軸線方向に並べて3個のポートを開口するとともに、軸線を挟んで前記3個のポートの反対側に別の3個のポートを軸線方向に並べて開口して、前記主弁室内で前記主弁体を移動させることにより連通するポート間を切り換え、
前記主弁体は、筒状の高圧側スライド弁体と、前記高圧側スライド弁体の内側に摺動自在に嵌合される低圧側スライド弁体とを有し、
前記高圧側スライド弁体の内周面には、前記主弁室の軸線と直交する方向に向き合う内周面同士を繋ぐかけ渡し部を設けたことを特徴とする流路切換弁。 - 前記高圧側スライド弁体において前記低圧側スライド弁体側の端部を先端部とし、当該先端部と反対側の端部を基端部とするとき、前記かけ渡し部は、前記高圧側スライド弁体の前記基端部に設けたことを特徴とする請求項1に記載の流路切換弁。
- 前記低圧側スライド弁体に、前記高圧側スライド弁体側に突出する凸部を設け、
前記凸部と前記高圧側スライド弁体の内周面とで囲むことにより、高圧の流体が導入される高圧側Uターン通路を画成したことを特徴とする請求項1又は2に記載の流路切換弁。 - 前記かけ渡し部には、前記低圧側スライド弁体に向かって凸状にカーブした断面ドーム状の曲面部が形成されていることを特徴とする請求項3に記載の流路切換弁。
- 前記かけ渡し部は、前記高圧側スライド弁体の端面に、隣接する2つの前記ポートのそれぞれに連通する2つの開口部を設けることにより形成されたことを特徴とする請求項1~4のいずれかに記載の流路切換弁。
- 前記主弁室内で前記主弁体を移動させることにより、相対的に高圧の流体が導入される高圧側Uターン通路を介して前記3個のポートのうちの2個のポートを選択的に連通させるとともに、相対的に低圧の流体が導入される低圧側Uターン通路を介して前記別の3個のポートのうちの2個のポートを選択的に連通させ、且つ、前記3個のポートのうちの他の1個のポートと前記別の3個のポートのうちの他の1個のポートとが前記主弁ハウジング内を通じて連通する連通状態を選択的に複数とり得るようにしたことを特徴とする請求項1~5のいずれかに記載の流路切換弁。
- 前記高圧側スライド弁体と前記低圧側スライド弁体との間に、環状のシール部材を設けたことを特徴とする請求項1~6のいずれかに記載の流路切換弁。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19890163.9A EP3889478B1 (en) | 2018-11-29 | 2019-11-19 | Flow path switching valve |
| JP2020557570A JP7095914B2 (ja) | 2018-11-29 | 2019-11-19 | 流路切換弁 |
| CN201980078698.XA CN113167397A (zh) | 2018-11-29 | 2019-11-19 | 流路切换阀 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-223243 | 2018-11-29 | ||
| JP2018223243 | 2018-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020110840A1 true WO2020110840A1 (ja) | 2020-06-04 |
Family
ID=70852895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2019/045332 Ceased WO2020110840A1 (ja) | 2018-11-29 | 2019-11-19 | 流路切換弁 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3889478B1 (ja) |
| JP (1) | JP7095914B2 (ja) |
| CN (1) | CN113167397A (ja) |
| WO (1) | WO2020110840A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024198315A1 (zh) * | 2023-03-29 | 2024-10-03 | 约克广州空调冷冻设备有限公司 | 热泵系统 |
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| CN218000490U (zh) * | 2022-07-29 | 2022-12-09 | 浙江盾安禾田金属有限公司 | 滑块及具有其的四通阀 |
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| JP2018044666A (ja) | 2016-09-12 | 2018-03-22 | 株式会社不二工機 | 六方切換弁 |
| JP2018194032A (ja) * | 2017-05-12 | 2018-12-06 | 株式会社不二工機 | 流路切換弁 |
| JP2019065895A (ja) * | 2017-09-29 | 2019-04-25 | 株式会社不二工機 | 六方切換弁 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105004109B (zh) * | 2015-05-26 | 2017-08-15 | 广东美的制冷设备有限公司 | 六通阀及具有该六通阀的冷暖型空调器 |
| WO2016192146A1 (zh) * | 2015-06-01 | 2016-12-08 | 广东美的暖通设备有限公司 | 六通换向阀及具有其的空调室外机、空调器 |
| JP6621686B2 (ja) * | 2016-02-26 | 2019-12-18 | 株式会社不二工機 | 六方切換弁 |
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- 2019-11-19 CN CN201980078698.XA patent/CN113167397A/zh active Pending
- 2019-11-19 WO PCT/JP2019/045332 patent/WO2020110840A1/ja not_active Ceased
- 2019-11-19 EP EP19890163.9A patent/EP3889478B1/en active Active
- 2019-11-19 JP JP2020557570A patent/JP7095914B2/ja active Active
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| JPH08170864A (ja) | 1994-12-19 | 1996-07-02 | Sanyo Electric Co Ltd | ヒートポンプ空調装置及び除霜方法 |
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| JP2009109063A (ja) * | 2007-10-29 | 2009-05-21 | Hitachi Appliances Inc | 四方切換弁及びこれを用いた冷凍サイクル装置 |
| CN102954243A (zh) * | 2011-08-29 | 2013-03-06 | 浙江三花制冷集团有限公司 | 大型四通换向阀及其滑块部件 |
| JP2018044666A (ja) | 2016-09-12 | 2018-03-22 | 株式会社不二工機 | 六方切換弁 |
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| WO2024198315A1 (zh) * | 2023-03-29 | 2024-10-03 | 约克广州空调冷冻设备有限公司 | 热泵系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3889478B1 (en) | 2025-07-23 |
| EP3889478A4 (en) | 2022-08-31 |
| JP7095914B2 (ja) | 2022-07-05 |
| EP3889478A1 (en) | 2021-10-06 |
| CN113167397A (zh) | 2021-07-23 |
| JPWO2020110840A1 (ja) | 2021-10-21 |
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