JP6261008B2 - Sliding switching valve and refrigeration cycle system - Google Patents

Description

  The present invention relates to a slide type switching valve and a refrigeration cycle system.

  Conventionally, as a refrigeration cycle used in an air conditioner such as a room air conditioner, the refrigerant is circulated to the compressor via the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger during the cooling mode (cooling) operation. It is used that reverses the direction of refrigerant circulation so that the refrigerant is circulated to the compressor via the compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger during heating mode (heating) operation. Has been. As a flow path switching valve (so-called four-way switching valve) for reversing the refrigerant circulation path in such a refrigeration cycle, a sliding type switching valve having a valve body slidably provided inside the valve body is widely used. ing.

  The valve body of the slide-type switching valve is connected to the discharge port of the compressor via a D joint to allow high-pressure refrigerant to flow in, and connected to the suction port of the compressor via an S joint to compress the refrigerant. An outflow port to be returned to the machine, an indoor side port connected to the indoor heat exchanger via an E joint, and an outdoor side port connected to the outdoor heat exchanger via a C joint are provided. The slide type switching valve has a cooling mode in which the outflow port and the indoor side port are communicated with each other by the valve body slid to one side, and the inflow port and the outdoor side port are communicated with each other inside the valve body, and on the other side. The outflow port and the outdoor port are communicated by the slidable valve body, and the heating mode in which the inflow port and the indoor port are communicated by the inside of the valve body is switched.

  In room air conditioners and packaged air conditioners that use such slide-type switching valves, in order to improve the APF (Annual Performance Factor), to reduce the flow rate and heat loss of the refrigerant due to the flow resistance. Has been proposed (see, for example, Patent Documents 1 and 2).

  In the slide type switching valve described in Patent Document 1, as shown in FIG. 11, the inflow port 101 and the indoor side port 102 are provided at positions facing each other, and the high-pressure refrigerant introduced from the inflow port 101 is supplied to the indoor side port. By causing the flow to flow linearly toward 102, the flow resistance is reduced in the heating (heating) mode shown in FIG.

  Moreover, in the slide type switching valve described in Patent Document 2, inflow ports are formed at two locations facing the indoor side port and the outdoor side port, respectively, and a high-pressure conduit (D joint) branched into two forks toward each inflow port. ) Is provided.

Japanese Patent No. 5300657 JP 2002-22315 A

  However, even in the conventional slide type switching valve as described in Patent Documents 1 and 2, the improvement of the APF is insufficient, and further efficiency is desired. That is, in the slide type switching valve described in Patent Document 1, although the flow resistance in the heating (heating) mode shown in FIG. 11A is reduced, the cooling (cooling) shown in FIG. ) Mode, since there is a refrigerant flow path from the inflow port 101 to the outdoor port 103, the flow rate of the refrigerant decreases, and the APF cannot be sufficiently improved. On the other hand, in the slide type switching valve described in Patent Document 2, the flow path resistance inside the bifurcated D joint increases, resulting in a decrease in refrigerant flow rate and heat loss, and a complicated structure of the D joint. There is a problem that the manufacturing cost increases and the slide type switching valve becomes large.

  An object of the present invention is to provide a slide type switching valve and a refrigeration cycle system capable of improving the APF while suppressing an increase in manufacturing cost and an increase in size.

  The slide type switching valve of the present invention includes a cylindrical valve body, a valve body slidably provided inside the valve body, and a plurality of ports provided to be opened in the peripheral surface of the valve body, The plurality of ports include an inflow port for allowing fluid to flow into the valve body, and a first port provided on the opposite side of the valve body in the radial direction with respect to the inflow port. A port, a second port, and a third port, and the second port is provided facing the inflow port on one side of the first port along the axial direction of the valve body, The third port is provided on the other side of the first port, and the valve body slides to one side along the axial direction of the valve body to communicate the first port and the second port. Slide to one position and the other side along the axial direction of the valve body The flow path is switched by moving between the first port and the second position where the third port communicates, and the valve body has fluid flowing into the valve body from the inflow port. A restriction wall for restricting flow is provided; in the first position of the valve body, the restriction wall is located on one side of the inflow port and the second port; and in the second position of the valve body, The restriction wall is located on the other side of the inflow port and the second port.

  According to the present invention, since the second port is provided opposite to the inflow port, in the state where the valve body is in the second position (for example, in the heating mode), the inside of the valve body is formed from the inflow port. It is possible to flow the fluid that has flowed into the straight line toward the second port, and to reduce the flow resistance. Further, the valve body is provided with a restriction wall, and when the valve body is in the second position, the restriction wall is located on the other side of the inflow port and the second port, so that the other side further than the restriction wall. The flow of fluid to the second port can be restricted, and a decrease in the flow rate of fluid from the inflow port to the second port can be suppressed. On the other hand, in a state where the valve body is in the first position (for example, in the cooling mode), the restriction wall is located on one side of the inflow port and the second port, so that the fluid further to the one side than the restriction wall In addition to restricting the flow of the fluid, the fluid can be guided to the other side, that is, the third port side, thereby suppressing a decrease in the flow rate of the fluid from the inflow port to the third port.

  Further, by providing a regulating wall on the valve body and appropriately regulating the flow of the fluid inside the valve body by this regulating wall, it is not necessary to make the D joint connected to the inflow port into a special shape. It is possible to prevent an increase in flow resistance in the interior of the fluid and suppress a decrease in fluid flow rate and heat loss. Furthermore, since the structure of the D joint does not become complicated, it is possible to prevent the slide type switching valve from increasing in size while suppressing the manufacturing cost.

  At this time, it is preferable that the regulation wall is formed in a convex shape toward one side in the axial direction of the valve body and a concave shape toward the other side.

  According to this configuration, the restriction wall is formed in a concave shape toward the other side in the axial direction of the valve body, so that the fluid is transferred to the other side by the concave inner surface of the restriction wall when the valve body is in the first position. Can be smoothly guided, and the flow resistance of the fluid from the inflow port to the third port can be reduced.

  The valve body includes a pair of piston bodies that are in sliding contact with the inner peripheral surface of the valve body, a connection member that connects the pair of piston bodies and extends along the axial direction of the valve body, and the connection member. And a valve member that switches the plurality of ports. The restriction wall is preferably formed integrally with either the coupling member or the valve member.

  According to this configuration, when the valve body is configured with a pair of piston bodies, a connecting member, and a valve member, the restriction wall is integrally formed on either the connecting member or the valve member. A restriction wall can be provided without increasing the number of parts.

  Further, the valve member is formed of a resin material in which the restriction wall is integrally formed, or the connecting member is formed of a metal plate material that is integrally formed by cutting and raising the restriction wall. Is preferred.

  According to these configurations, the restriction wall can be provided on the valve member made of a resin material without increasing the cost and the number of manufacturing steps of the valve member. On the other hand, a part of the connecting member made of a metal plate material is cut and raised to integrally form the regulating wall, so that the regulating wall can be provided without increasing the cost of the connecting member and the number of manufacturing steps.

  The refrigeration cycle system of the present invention includes a compressor that compresses a refrigerant that is a fluid, a first heat exchanger that functions as a condenser in the cooling mode, a second heat exchanger that functions as an evaporator in the cooling mode, An expansion means for expanding and depressurizing the refrigerant between the first heat exchanger and the second heat exchanger; and any one of the slide type switching valves, wherein the sliding type switching valve is the valve In a state where the body is located at the first position, the refrigerant compressed by the compressor is caused to flow into the valve body from the inlet port, and the refrigerant is supplied to the first heat exchanger via the third port. The refrigerant that has flowed out and recirculated from the second heat exchanger to the second port is returned to the compressor from the first port, or in the state where the valve body is positioned at the second position, Compressed refrigerant While flowing into the valve body from the inflow port, the refrigerant flows out to the second heat exchanger via the second port, and the refrigerant flowing into the third port from the first heat exchanger It is characterized by returning to the compressor from the first port.

  According to such a refrigeration cycle system of the present invention, in a state where the valve body is located at the first position, the refrigerant compressed by the compressor is caused to flow out from the inflow port to the first heat exchanger via the third port, The cooling mode (cooling) operation is performed by returning the refrigerant flowing into the second port from the second heat exchanger to the compressor from the first port. In this cooling mode (cooling) operation, the refrigerant is guided to the third port on the other side because the restriction wall is located on one side of the inflow port and the second port of the slide type switching valve as described above. Thus, a decrease in flow rate can be suppressed.

  On the other hand, with the valve body positioned at the second position, the refrigerant compressed by the compressor flows out from the inflow port to the second heat exchanger through the second port, and flows into the third port from the first heat exchanger. The heating mode (heating) operation is performed by causing the refrigerant thus recirculated to the compressor from the first port. During this heating mode (heating) operation, similarly to the above, the refrigerant can flow linearly from the inflow port toward the second port, and the flow path resistance can be reduced. Furthermore, since the restriction wall is located on the other side of the inflow port and the second port of the slide type switching valve, it is possible to suppress a decrease in the flow rate of the refrigerant from the inflow port to the second port.

  According to the slide type switching valve and the refrigeration cycle system of the present invention, an increase in manufacturing cost and an increase in size of the sliding type switching valve are suppressed, and a decrease in fluid flow rate and a heat loss are suppressed to reduce APF (year-round energy consumption efficiency). Can be improved.

It is a schematic structure figure of the refrigerating cycle concerning one embodiment of the present invention, and is a figure showing heating mode. It is a schematic block diagram of the said refrigerating cycle, and is a figure which shows cooling mode. It is sectional drawing which shows the slide type switching valve of 1st Embodiment used for the said refrigerating cycle, and is a figure which shows the state at the time of heating mode. It is sectional drawing which shows the said slide type switching valve, and is a figure which shows the state at the time of cooling mode. It is a perspective view which shows the valve member used for the said slide type switching valve. It is a side view which shows the said valve member. It is a top view which shows the relationship between the said valve member and an inflow port. It is sectional drawing which shows the slide type switching valve of 2nd Embodiment used for the said refrigerating cycle, and is a figure which shows the state at the time of heating mode. It is sectional drawing which shows the said slide type switching valve, and is a figure which shows the state at the time of cooling mode. It is a perspective view which shows the connection member used for the said slide type switching valve. It is sectional drawing which shows the slide type switching valve which concerns on the prior art example of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. The refrigeration cycle 1 of the present embodiment is used in an air conditioner such as a room air conditioner, and is an outdoor as a compressor 2 that compresses refrigerant and a first heat exchanger that functions as a condenser in the cooling mode. The refrigerant is expanded and decompressed between the heat exchanger 3, the indoor heat exchanger 4 as a second heat exchanger that functions as an evaporator in the cooling mode, and the outdoor heat exchanger 3 and the indoor heat exchanger 4. An expansion valve 5 as expansion means, a four-way switching valve 10 which is a slide type switching valve, and a pilot electromagnetic valve 6 which controls switching of the flow path of the four-way switching valve 10, and these are connected by a refrigerant pipe. Yes. The expansion means is not limited to the expansion valve 5 and may be a capillary.

  This refrigeration cycle 1 includes a compressor 2, a four-way switching valve 10, an indoor heat exchanger 4, an expansion valve 5, an outdoor heat exchanger 3, a four-way switching valve 10 and a compression in the heating mode (heating operation) shown in FIG. A heating cycle in which the refrigerant flows in the order of the machine 2 is configured. On the other hand, in the cooling mode (cooling operation) shown in FIG. 2, the refrigerant is in the order of the compressor 2, the four-way switching valve 10, the outdoor heat exchanger 3, the expansion valve 5, the indoor heat exchanger 4, the four-way switching valve 10 and the compressor 2. Constitutes the cooling cycle through which the air flows. Switching between the heating cycle and the cooling cycle is performed by a switching operation of the four-way switching valve 10 by the pilot solenoid valve 6.

  A four-way switching valve according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 3 and 4, the four-way switching valve 10 of the first embodiment includes a cylindrical valve body 11, a valve body 12 slidably provided inside the valve body 11, and a compressor 2. A high pressure side conduit (D joint) 13 communicating with the discharge port, a low pressure side conduit (S joint) 14 communicating with the suction port of the compressor 2, and an indoor side conduit (E joint) 15 communicating with the indoor heat exchanger 4. And an outdoor conduit (C joint) 16 communicating with the outdoor heat exchanger 3.

  The cylindrical valve main body 11 has plug bodies 17 and 18 that close both axial ends thereof, and a valve seat 19 fixed inside the valve main body 11, and is configured as a sealed cylinder as a whole. Yes. Connected to the plug bodies 17 and 18 are conduits 17A and 18A communicating with the pilot solenoid valve 6, respectively. The valve seat 19 is inserted with the tips of the low-pressure side conduit 14, the indoor side conduit 15, and the outdoor side conduit 16, and is provided with openings that constitute first to third ports 11B, 11C, and 11D described later. ing. The inner surface 19 </ b> A of the valve seat 19 is a guide surface that slides the valve body 12.

  The valve body 11 is formed with a plurality of ports 11A, 11B, 11C, and 11D that are opened on the peripheral surface thereof. That is, an inflow port 11A to which the high-pressure side conduit 13 is connected to allow the refrigerant to flow into the valve body 11, and a first port that opens to the valve seat 19 on the opposite side of the inflow port 11A in the radial direction of the valve body 11 11B, the second port 11C, and the third port 11D are provided. The first port 11B is provided substantially at the center in the axial direction of the valve body 11, and the second port 11C is adjacent to one side of the first port 11B (left side in FIGS. 3 and 4) along the axial direction of the valve body 11. The third port 11D is provided on the other side of the first port 11B along the axial direction of the valve body 11 (on the right side in FIGS. 3 and 4).

  The first port 11B as the outflow port is connected to the low pressure side conduit 14, and the second port 11C is connected to the indoor side conduit 15, so that the second port 11C constitutes the indoor side port, By connecting the outdoor conduit 16 to the port 11D, the third port 11D forms an outdoor port. The inflow port 11A and the second port 11B are provided so as to face each other in the radial direction of the valve body 11, whereby the high-pressure side conduit 13 and the indoor side conduit 15 are positioned and connected in a straight line. The high-pressure side conduit 13 is brazed and fixed to the valve body 11 around the inflow port 11A, and the low-pressure side conduit 14, the indoor-side conduit 15 and the outdoor-side conduit 16 are around the first to third ports 11B, 11C and 11D, respectively. The valve body 11 and the valve seat 19 are brazed and fixed.

  The valve body 12 includes a pair of left and right piston bodies 21 and 22 that are in sliding contact with the inner peripheral surface of the valve body 11, and a connecting member 23 that connects the pair of piston bodies 21 and 22 and extends along the axial direction of the valve body 11. , And a valve member 24 supported by the connecting member 23. The internal space of the valve body 11 includes a high pressure chamber R1 formed between the pair of piston bodies 21 and 22, a first working chamber R2 formed between one piston body 21 and the plug body 17, and the other The second working chamber R3 formed between the piston body 22 and the plug body 18 is partitioned.

  The connecting member 23 is made of a metal plate, extends along the axial direction of the valve body 11, and is provided with a connecting plate portion 23A provided in parallel with the inner surface 19A of the valve seat 19, and one end of the connecting plate portion 23A being bent. A fixed piece portion 23B fixed to the piston body 21 and a fixed piece portion 23C fixed to the piston body 22 by bending the other end portion of the connecting plate portion 23A are formed. The connecting plate portion 23A is formed with a holding hole 23D for holding the valve member 24 and two through holes 23E through which the refrigerant flows.

  As shown in FIGS. 5 and 6, the valve member 24 is an integrally molded member made of synthetic resin, and has a flange portion 25 that opens in a concave shape toward the valve seat 19 and an outer edge of the flange portion 25. A flange portion 26 extending in the direction and a regulating wall 27 that rises perpendicularly to the flange portion 26 on one side of the flange portion 25 are formed. The flange 25 is formed in a dome shape having an oval shape in plan view, and is inserted into the holding hole 23 </ b> D of the connecting member 23. In the inside of the collar portion 25, the first port 11B and the second port 11C are communicated and the third port 11D is not communicated, or the first port 11B and the third port 11D are communicated and the second port is communicated. A communication space 25A that does not allow communication of 11C is formed.

  The flange portion 26 is formed in a rectangular shape in plan view, and is connected to a sliding contact surface 26A that is in sliding contact with the inner surface 19A of the valve seat 19 and an opposite side (upper side in FIGS. 3 and 4) to the sliding contact surface 26A. And an opposing surface 26B facing the connecting plate portion 23A of the member 23. The flange portion 26 is disposed between the valve seat 19 and the connecting member 23. The sliding contact surface 26A is brought into close contact with the inner surface 19A of the valve seat 19 due to the pressure difference between the high pressure and the low pressure acting on the valve member 24, and the communication space 25A of the flange 25 is closed with respect to the valve seat 19. Yes.

  The restriction wall 27 is a substantially C-shaped wall in a plan view (when viewed from a direction orthogonal to the inner surface 19A of the valve seat 19) that rises along the outer surface on one side of the flange 25. It is formed in a convex shape toward one side in the axial direction (left side in FIGS. 3 and 4) and concave in the other side (right side in FIGS. 3 and 4). That is, the regulation wall 27 is formed to have a convex outer surface portion 27A and a concave inner surface portion 27B. The upper end surface 27C of the restriction wall 27 is formed in an arc shape along the inner peripheral surface of the valve body 11, and has an inclination (taper) that approaches the valve seat 19 side from one side to the other side. It is formed. The regulating wall 27 is provided so as to be as close as possible to the inner peripheral surface of the valve body 11 so that the gap is as small as possible. Thus, in the high pressure chamber R1, from one side to the other side, or from the other side to the one side. It is comprised so that the flow of the going refrigerant can be regulated.

  In the above four-way switching valve 10, when the high-pressure refrigerant discharged from the compressor 2 is introduced into the first working chamber R2 via the pilot solenoid valve 6 and the conduit 17A, as shown in FIG. The valve body 12 is slid to the other axial side of the valve body 11 by being pressed. Further, when the high-pressure refrigerant is introduced into the second working chamber R3 via the pilot solenoid valve 6 and the conduit 18A, the piston body 22 is pressed and the valve body 12 is moved in the axial direction of the valve body 11 as shown in FIG. Slide to one side. Here, the position of the valve body 12 slid to one side in the axial direction of the valve body 11 (position shown in FIG. 4) is the first position, and the position of the valve body 12 slid to the other side in the axial direction of the valve body 11. The position shown in FIG. 3 is set as the second position.

  In a state where the valve body 12 is in the second position, as shown in FIG. 3, the flange portion 25 of the valve member 24 allows the first port 11B and the third port 11D to communicate with each other through the communication space 25A. Further, since the flange portion 25 is located on the other side of the second port 11C, the second port 11C communicates with the inflow port 11A through the inside of the valve body 11 (high pressure chamber R1). That is, the state in which the valve body 12 is in the second position is a heating mode (heating operation) in which the inflow port 11A and the second port 11C are communicated and the first port 11B and the third port 11D are communicated. .

  In the heating mode, the restriction wall 27 of the valve body 12 in the second position is located on the other side of the inflow port 11A and the second port 11C as shown in FIG. Therefore, the high-pressure refrigerant that has flowed into the high-pressure chamber R1 from the inflow port 11A flows linearly toward the second port 11C, and the flow to the other side is restricted by the restriction wall 27, so that the second port 11C It is possible to suppress a decrease in the flow rate of the flowing refrigerant.

  In contrast to the four-way switching valve 10 of the present embodiment, the conventional four-way switching valve is linear in the heating mode from the inflow port 101 toward the indoor side port 102 as shown in FIG. However, a part of the high-pressure refrigerant flows through the periphery of the valve body 104 to the other side (outdoor port 103 side), thereby causing a decrease in refrigerant flow rate and heat loss. I was there.

  Next, in a state where the valve body 12 is in the first position, as shown in FIG. 4, the flange portion 25 of the valve member 24 allows the first port 11B and the second port 11C to communicate with each other through the communication space 25A. Further, since the flange portion 25 is located on one side of the third port 11D, the third port 11D communicates with the inflow port 11A via the inside of the valve body 11 (high pressure chamber R1). That is, the state in which the valve body 12 is in the first position is a cooling mode (cooling operation) in which the inflow port 11A and the third port 11D are in communication and the first port 11B and the second port 11C are in communication.

  In the cooling mode, the restriction wall 27 of the valve body 12 in the first position is located on one side of the inflow port 11A and the second port 11C as shown in FIG. 7B. Accordingly, the high-pressure refrigerant flowing into the high-pressure chamber R1 from the inflow port 11A flows to the other side (the third port 11D side) while passing through the periphery of the valve body 12, and the flow to the one side is restricted by the restriction wall 27. Thus, a decrease in the flow rate of the refrigerant toward the third port 11D can be suppressed. At this time, since the regulating wall 27 has the concave inner surface portion 27B toward the other side, the inner surface portion 27B can smoothly guide the high-pressure refrigerant toward the third port 11D, and the flow path resistance is suppressed. It can be done.

  In contrast to the four-way switching valve 10 of this embodiment, in the conventional four-way switching valve, as shown in FIG. 11 (B), the high-pressure refrigerant flowing from the inflow port 101 is cooled by the valve body 104 in the cooling mode. While the flow was hindered, a lot of high-pressure refrigerant flowed to one side opposite to the outdoor port 103, thereby increasing the flow path resistance of the refrigerant, leading to a significant decrease in flow rate.

  According to the above embodiment, the flow of the high-pressure refrigerant is regulated by the regulation wall 27 in the state where the valve body 12 is in either the first position (cooling mode) or the second position (heating mode). Accordingly, it is possible to suppress a decrease in the flow rate of the refrigerant from the inflow port 11A toward the second or third port 11C, 11D. In particular, when the valve body 12 is in the second position (warming mode), heat loss can be reduced.

  Further, only the restriction wall 27 is provided on the valve member 24 of the valve body 12, and the valve main body 11 and the high-pressure side conduit 13 other than the valve member 24 use members in a general form. It is possible to prevent an increase in flow path resistance inside 13 and suppress a decrease in the flow rate of refrigerant and heat loss. Further, the structure of the high-pressure side conduit 13 is not complicated, and the slide type switching valve can be prevented from being enlarged while suppressing the manufacturing cost.

  Further, since the regulating wall 27 is integrally formed with the valve member 24 made of a resin material, the regulating wall 27 can be provided without increasing the number of parts and without increasing the number of manufacturing steps and costs. Further, the restriction wall 27 has a concave inner surface portion 27B toward the other axial side of the valve body 11, so that the refrigerant is supplied to the other side by the inner surface portion 27B of the restriction wall 27 when the valve body 12 is in the first position. Can be smoothly guided to the side, and the flow path resistance of the refrigerant from the inflow port 11A toward the third port 11D can be reduced.

  Next, a four-way selector valve according to a second embodiment of the present invention will be described with reference to FIGS. The four-way switching valve 10A of the present embodiment is different from the four-way switching valve 10 of the first embodiment in the configuration of the valve body 12A, and the other configurations are the same or similar. Hereinafter, differences from the first embodiment will be described in detail, and the same or similar configurations as those of the first embodiment may be denoted by the same reference numerals and description thereof may be omitted.

  In the four-way switching valve 10A of the present embodiment, as shown in FIGS. 8 and 9, the valve body 12A includes a pair of left and right piston bodies 21, 22 and a connecting member 23 that connects the pair of piston bodies 21, 22. And a valve member 24 supported by the member 23. The connecting member 23 has a connecting plate portion 23A and fixed pieces 23B and 23C, and a holding hole 23D and a through hole 23E are formed in the connecting plate portion 23A. The valve member 24 is formed to have a flange portion 25 and a flange portion 26, and the restriction wall 27 is omitted.

  The connecting member 23 is formed with a regulating wall 28 that rises perpendicular to the connecting plate portion 23 </ b> A on one side of the holding hole 23. The restriction wall 28 is a substantially C-shaped wall in plan view that rises along one edge of the holding hole 23, and is cut and raised from the connecting plate portion 23 </ b> A to be integrally formed. The regulation wall 28 includes an outer surface portion 28A that is convex toward one side (left side in FIGS. 8 and 9) of the valve body 11 and an inner surface portion that is concave toward the other side (right side in FIGS. 8 and 9). 28B. The upper end surface 28C of the regulating wall 28 is formed in an arc shape along the inner peripheral surface of the valve body 11, and has an inclination (taper) that approaches the valve seat 19 side from one side to the other side. It is formed. The regulation wall 28 is provided so as to be as close as possible to the inner peripheral surface of the valve body 11 so that the gap is as small as possible. Thus, in the high pressure chamber R1, from one side to the other side, or from the other side to the one side. It is comprised so that the flow of the going refrigerant can be regulated.

  In the above four-way switching valve 10A, when the valve body 12 is in the second position, the first port 11B and the third port 11D are communicated by the communication space 25A of the flange 25 as shown in FIG. The port 11A and the second port 11C are communicated via the high pressure chamber R1. In this heating mode, the regulation wall 28 of the valve body 12 in the second position is located on the other side of the inflow port 11A and the second port 11C. Therefore, the high-pressure refrigerant that has flowed into the high-pressure chamber R1 from the inflow port 11A flows linearly toward the second port 11C, and the flow to the other side is restricted by the restriction wall 28, so that the second port 11C It is possible to suppress a decrease in the flow rate of the flowing refrigerant.

  On the other hand, in the state where the valve body 12 is in the first position, as shown in FIG. 9, the first port 11B and the second port 11C are communicated by the communication space 25A of the flange 25, and the inflow port 11A and the third port 11D communicates with the high pressure chamber R1. In this cooling mode, the regulation wall 28 of the valve body 12 in the first position is located on one side of the inflow port 11A and the second port 11C. Accordingly, the high-pressure refrigerant that has flowed into the high-pressure chamber R1 from the inflow port 11A flows to the other side (the third port 11D side) while passing through the periphery of the valve body 12, and the flow to the one side is restricted by the restriction wall 28. Thus, a decrease in the flow rate of the refrigerant toward the third port 11D can be suppressed. At this time, since the regulation wall 28 has the concave inner surface portion 28B toward the other side, the high pressure refrigerant can be smoothly guided toward the third port 11D by the inner surface portion 28B, and the flow path resistance is suppressed. It can be done.

  According to the above embodiment, the flow of the high-pressure refrigerant is regulated by the regulation wall 28 in the state where the valve body 12 is in either the first position (cooling mode) or the second position (heating mode). Accordingly, it is possible to suppress a decrease in the flow rate of the refrigerant from the inflow port 11A toward the second or third port 11C, 11D. In particular, when the valve body 12 is in the second position (warming mode), heat loss can be reduced.

  Further, only the regulation wall 28 is provided on the connecting member 23 of the valve body 12, and the valve main body 11 and the high-pressure side conduit 13 other than the connecting member 23 use members having a general form. It is possible to prevent an increase in flow path resistance inside 13 and suppress a decrease in the flow rate of refrigerant and heat loss. Further, the structure of the high-pressure side conduit 13 is not complicated, and the slide type switching valve can be prevented from being enlarged while suppressing the manufacturing cost.

  Further, since the regulation wall 28 is integrally formed with the connecting member 23 made of a metal plate material, the regulation wall 28 can be provided without increasing the number of parts and without increasing the number of manufacturing steps and costs. Further, the regulation wall 28 has a concave inner surface portion 28B toward the other axial side of the valve body 11, so that the refrigerant is supplied to the other side by the inner surface portion 28B of the regulation wall 28 when the valve body 12 is in the first position. Can be smoothly guided to the side, and the flow path resistance of the refrigerant from the inflow port 11A toward the third port 11D can be reduced.

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention. For example, in the said embodiment, although the refrigerating cycle 1 utilized for air conditioners, such as a room air conditioner, was illustrated, the refrigerating cycle of this invention is switched not only to an air conditioner but a heating mode and a cooling mode. Any device can be used. Moreover, the slide type switching valve of the present invention is not limited to the one used for the switching valve in the refrigeration cycle, but can be used for various piping systems for circulating various fluids such as gas and liquid.

  In the embodiment, in the valve body 11, the inflow port 11 </ b> A to which the high-pressure side conduit 13 is connected and the second port 11 </ b> C to which the indoor side conduit 15 is connected face each other in the radial direction of the valve body 11. In the heating mode, the configuration in which the high-pressure refrigerant flowing from the inflow port 11A linearly flows toward the second port 11C has been described. However, the present invention is not limited to this. That is, the inflow port 11A and the third port 11D to which the outdoor conduit 16 is connected are provided so as to oppose each other in the radial direction of the valve body 11, and in the cooling mode, the high-pressure refrigerant flowing from the inflow port 11A is third. It may be configured to flow linearly toward the port 11D.

  Moreover, in the said embodiment, although the restriction wall 27 was provided in the valve member 24 in the valve body 12, or the structure in which the restriction wall 28 was provided in the connection member 23 in the valve body 12 was disclosed, a restriction wall is a valve member. It is not limited to that provided on the connecting member, and may be provided at an appropriate position of the valve body. That is, when the valve body is not configured to include the coupling member and the valve member but is configured by a member in which these are integrated, the member may be provided with a restriction wall. In the case where is configured to include other members in addition to the connecting member and the valve member, the other member may be provided with a restriction wall. Further, the restriction wall is not limited to being formed integrally with the connecting member or the valve member, and may be configured by fixing a separate wall member to the connecting member or the valve member.

  Further, in the slide type switching valve of the present invention, when the valve body is in the first position, the fluid is located on the other side of the third port, and the fluid flowing into the valve body from the inflow port is directed toward the third port. A guide wall for guiding may be provided on the valve body. Specifically, as shown in FIGS. 4 and 9 of the embodiment, when the valve body 12 is in the first position, the guide wall is located on the other side (right side in the drawing) from the third port 11D. In this way, it suffices if it is formed so as to rise from the connecting plate portion 23A of the connecting member 23 along the substantially half circumference on the right side (piston body 22 side) of the through hole 23E on the right side in the drawing. If such a guide wall is provided, in the cooling mode in which the valve body 12 is in the first position, it is possible to further suppress a decrease in the flow rate of the refrigerant from the inflow port 11A toward the third port 11D.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

1 Refrigeration cycle 2 Compressor 3 Outdoor heat exchanger (first heat exchanger)
4 Indoor heat exchanger (second heat exchanger)
5 Expansion valve (expansion means)
10, 10A Four-way switching valve (sliding switching valve)
11 Valve body 11A Inflow port 11B First port 11C Second port 11D Third port 12, 12A Valve body 21, 22 Piston body 23 Connecting member 24 Valve member 27, 28 Restriction wall

Claims (6)

A slide type switching valve comprising a cylindrical valve body, a valve body slidably provided inside the valve body, and a plurality of ports provided to be opened in a peripheral surface of the valve body. And
The plurality of ports include an inflow port for allowing fluid to flow into the valve body, and a first port, a second port, and a third port provided on the radially opposite side of the valve body with respect to the inflow port. The second port is provided on one side of the first port along the axial direction of the valve body so as to face the inflow port, and the third port is provided on the other side of the first port. A port is provided,
The valve body is slid to one side along the axial direction of the valve main body to be in a first position where the first port communicates with the second port, and on the other side along the axial direction of the valve main body. By switching between the second position where the first port and the third port communicate with each other by sliding, the flow path is switched,
The valve body is provided with a regulation wall that regulates the flow of fluid that has flowed into the valve body from the inflow port,
In the first position of the valve body, the restriction wall is located on one side of the inflow port and the second port, and in the second position of the valve body, than the inflow port and the second port. A sliding type switching valve, wherein the regulating wall is located on the other side.   The slide type switching valve according to claim 1, wherein the restriction wall is formed in a convex shape toward one side in the axial direction of the valve body and concave in the other side. The valve body is supported by the pair of piston bodies that are in sliding contact with the inner peripheral surface of the valve body, a connection member that connects the pair of piston bodies and extends along the axial direction of the valve body, and the connection member. And a valve member that switches between the plurality of ports.
The sliding type switching valve according to claim 1 or 2, wherein the restriction wall is formed integrally with either the connecting member or the valve member.   The slide type switching valve according to claim 3, wherein the valve member is formed of a resin material in which the restriction wall is integrally formed.   The slide type switching valve according to claim 3, wherein the connecting member is formed of a metal plate material that is integrally formed by cutting and raising the restriction wall. A compressor that compresses a refrigerant that is a fluid, a first heat exchanger that functions as a condenser in the cooling mode, a second heat exchanger that functions as an evaporator in the cooling mode, the first heat exchanger, and the first An expansion means for expanding and reducing the pressure of the refrigerant between the two heat exchangers, and the slide type switching valve according to any one of claims 1 to 5,
The sliding switching valve is
In a state where the valve body is located at the first position, the refrigerant compressed by the compressor is caused to flow into the valve body from the inflow port and to the first heat exchanger via the third port. The refrigerant is caused to flow out, and the refrigerant that has flowed into the second port from the second heat exchanger is recirculated from the first port to the compressor,
Or
In a state where the valve body is located at the second position, the refrigerant compressed by the compressor is caused to flow into the valve body from the inflow port and to the second heat exchanger via the second port. A refrigeration cycle system, wherein the refrigerant flows out and the refrigerant that has flowed into the third port from the first heat exchanger is recirculated from the first port to the compressor.

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