JP2019124337A - Slide-type selector valve, and refrigeration cycle system including the same - Google Patents

Abstract

To provide a slide-type selector valve including a slide valve having high pressure resistance even in an abnormal operation state of a refrigeration system such as an air conditioner, that an outer peripheral portion of the slide valve has high temperature and high pressure, and capable of suppressing lowering of a flow rate, and preventing increase in size of the slide-type selector valve and degradation of efficiency of the system.SOLUTION: End portions of a reinforcement pin 42 are press-fitted and fixed to grooves 40G near lower end portions of central portions of inner peripheral portions of first wall portions 40W1 in a manner that the reinforcement pin 42 in the slide valve 40 crosses the pair of first wall portions 40W1, and thick reinforcement portions 40HWT are formed on peripheral edges of the grooves 40G of the first wall portions 40W1.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a slide type switching valve including a slide valve, and a refrigeration cycle system including the same.

  DESCRIPTION OF RELATED ART In the air conditioner provided with a refrigerant circuit, the slide-type switching valve for switching the flow of the refrigerant | coolant in cooling operation and heating operation is provided in practical use. The slide-type switching valve is, for example, a four-way switching valve as shown in Patent Document 1 and includes a slide valve in a valve body. The slide valve is generally formed of a resin material having high heat resistance and high pressure resistance, and a central portion thereof is a dome portion, and an edge portion of the dome portion is a flat sliding portion. The open end surface of the dome portion is formed in an oval shape, and on the inside thereof, a reinforcing rod member made of a metal material is stretched from one lower side surface to the other lower side surface. The reinforcing rod member has a uniform diameter from one end to the other end, and extends in the short diameter direction at the central portion of the dome portion, and both ends thereof are fitted into mounting grooves (holes) inside the dome portion. (See FIG. 2 of Patent Document 1). Further, in Patent Document 1, an example is shown in which the mounting portion of the reinforcing rod member is formed to be thicker than the portion other than the mounting portion in order to prevent stress concentration at the end face of the reinforcing rod member. (See FIG. 12 of Patent Document 1).

  Furthermore, in order to improve the sealability with the valve seat in the slide valve, for example, as disclosed in Patent Document 2, the opening of the slide valve corresponds to the cross-sectional shape of the flow path formed in the valve seat It is proposed to be shaped and provided with an O-ring groove (see FIGS. 2 and 3 in Patent Document 2).

JP 2001-304438 A Unexamined-Japanese-Patent No. 10-122395

  In the air conditioner, if a safety device such as a relief valve breaks down, there is a possibility that an abnormal operating state may occur, and in the four-way switching valve shown in the above-mentioned Patent Document 1, the outer peripheral temperature of the slide valve becomes high. The pressure may be higher than the pressure in normal operating conditions.

  When such a high temperature / high pressure refrigerant acts on the outer peripheral portion of the slide valve, if there is a thin-walled portion around the mounting hole of the reinforcing pin formed in the vicinity of the opening end face of the slide valve, the slide is caused by thermal deformation by the high temperature / high pressure refrigerant. In some cases, sufficient pressure resistance of the valve can not be secured. As a countermeasure in such a case, as proposed in the cited reference 1, one of the reinforcing pin mounting portions of the slide valve is formed such that the thickness of the mounting portion of the reinforcing rod member becomes larger than that of the portion other than the mounting portion. It is conceivable to make the part thicker, but even in this case, it may not yet be sufficient in pressure resistance. Therefore, it is also conceivable to make the thickness of the entire dome portion of the slide valve thicker.

  However, increasing the thickness of the entire dome part has a limit due to the positional relationship with other parts as it increases toward the outside of the slide valve, and leads to an increase in the size of the four-way switching valve. In addition, if thickening toward the inside of the dome portion of the slide valve, the low-pressure port is closed or the cross-sectional area of the communication passage of the slide valve becomes small, and the efficiency of the system decreases due to a decrease in the low-pressure flow It is not a good idea.

  In view of the above problems, the present invention is a slide type switching valve provided with a slide valve, and a refrigeration cycle system provided with the same, comprising a refrigeration system such as an air conditioner in which the outer peripheral portion of the slide valve has a high temperature and a high pressure. A slide type switching valve which has sufficient pressure resistance performance and can suppress a decrease in flow rate, and can avoid an increase in size of the slide type switching valve and a reduction in system efficiency, and a refrigeration provided with the same. The purpose is to provide a cycle system.

  In order to achieve the above-mentioned object, the slide type switching valve according to the present invention comprises a valve seat in which a plurality of ports to which each pipe is connected are arranged in a row, and a fluid inlet / outlet port in the valve seat. A valve main body including a slide valve having a communication passage internally communicated and disposed movably on the sealing surface of the valve seat, a piston member for driving the slide valve, and a piston member in the valve main body The slide valve includes a pair of first wall portions that form a part of the communication passage, and a reinforcing pin disposed across the lower portion of the first wall portion. The inner peripheral portion of the pair of first wall portions has a groove in which both ends of the reinforcing pin are fixed, and a thick reinforcing portion formed on the peripheral edge of the groove and the peripheral edge of the opening, When the slide valve is stopped, the peripheral part of the reinforcement part is for fluid in / out That protrude into the open end of the over preparative and which are located in the position where there is no.

The portion of the reinforcing portion that forms a part of the communication passage may have a curved surface, and extends from the periphery of the groove on the inner peripheral portion of the first wall to reach the vicinity of the fluid inlet / outlet port in the valve seat May be configured. The portion of the reinforcing portion that forms a part of the communication passage may be configured to extend from the periphery of the groove of the inner circumferential portion of the first wall portion to reach the vicinity of the upper portion of the communication passage. In addition, when the slide valve moves, the reinforcing portion may cross at least the fluid inflow port.
The cross-sectional area of the communication passage of the slide valve may be set larger than the cross-sectional area of the port communicating with the communication passage of the slide valve in the valve seat.

  Furthermore, the refrigeration cycle system according to the present invention includes a compressor, an evaporator, and a condenser, and the slide type switching valve described above is selectively switched to allow the refrigerant from the compressor to be condensed. It is characterized by being supplied to

  According to the slide type switching valve according to the present invention and the refrigeration cycle system including the same, the slide valve includes a pair of first wall portions that form a part of the communication passage and a lower portion of the first wall portion. The inner periphery of the pair of first walls is provided with a groove in which both ends of the reinforcing pin are fixed, and a wall formed around the periphery of the groove and the periphery of the opening. The reinforcement portion has a thick reinforcement portion, and the reinforcement portion is provided at a position where the peripheral edge of the reinforcement portion does not protrude to the opening end of the fluid inlet / outlet port when the slide valve is stopped. Even in an abnormal operating state of a refrigeration system such as an air conditioner, which has a high temperature and a high pressure, it has sufficient pressure resistance performance, and it is possible to suppress the flow rate decrease and avoid the enlargement of the slide type switching valve and the efficiency decrease of the system. .

It is a perspective view showing a slide valve used for an example of a slide type switching valve concerning the present invention. (A) is a cross-sectional view shown along the II-II line in FIG. 1, (B) is a cross-sectional view shown along the IIB-IIB line in the cross-sectional view shown in (A). It is a bottom view of the slide valve shown by FIG. It is a figure showing the composition of the refrigerating cycle system provided with an example of the slide type switching valve concerning the present invention. It is sectional drawing which shows the valve main-body part of the slide type | formula switching valve used for the example shown by FIG. It is a bottom view of another example of the slide valve used for an example of the slide type switching valve concerning the present invention. It is a bottom view of another example of the slide valve used for an example of the slide type switching valve concerning the present invention.

  FIG. 4 schematically shows the configuration of a refrigeration cycle system provided with an example of the slide type switching valve according to the present invention.

  The example shown in FIG. 4 is an example in which a slide type switching valve (hereinafter also referred to as a switching valve) is used as a four-way valve that switches the refrigerant flow of the air conditioner. For example, the switching valve causes the refrigerant to flow back to the compressor 14 via the compressor 14, the outdoor heat exchanger 16, the expansion valve 18, and the indoor heat exchanger 20 during the cooling operation, and the compressor 14 during the heating operation. In order to return the refrigerant to the compressor 14 via the indoor heat exchanger 20, the expansion valve 18, and the outdoor heat exchanger 16, the direction of return of the refrigerant is reversed. Further, the switching valve is configured to include a valve main body portion 10 and a pilot valve portion 12.

  The valve body portion 10 of the switching valve has a generally cylindrical casing 10CA, and a slide valve 40 slidably provided inside the casing 10CA. In the plurality of openings 10P1, 10P2, 10P3 and 10P4 provided in the outer peripheral portion of the casing 10CA, a plurality of joints 22, 24, 26 and 28 projecting in the radial direction of the casing 10CA respectively It is fixed by attachment etc.

  The casing 10CA is configured as a cylinder whose inside is sealed, having a plug 10D1 for closing both axial ends thereof, a plug 10D2 and a valve seat 30 fixed to the inside of the casing 10CA. ing. The switching joint pipes 12P1 and 12P2 of the pilot valve portion 12 are connected to the plug 10D1 and the plug 10D2, respectively. The tip of the joint 22, 24, 26 is inserted into each connection of the valve seat 30 corresponding to the opening 10P1, 10P2, 10P3 described above, and the opening constituting the ports 30P1, 30P2, and 30P3 is It is provided. The inner surface facing the slide valve 40 in the valve seat 30 is a sliding contact surface for slidingly guiding the slide valve 40.

  The opening 10P4 of the casing 10CA is an inflow port for allowing the high pressure refrigerant from the compressor 14 to flow into the valve body 10, and is connected to the discharge port of the compressor 14 via a joint (D joint) 28 which is a high pressure conduit. It is done. The port 30P2 in the valve seat 30 is an outlet side port 30P2 for returning the refrigerant to the compressor 14, and is connected to the suction port of the compressor 14 via a joint (S joint) 24 which is a low pressure conduit. The port 30P3 in the valve seat 30 is an indoor port 30P3 connected to the indoor heat exchanger 20 via the joint (E joint) 26. The port 30P1 is an outdoor port 30P1 connected to the outdoor heat exchanger 16 via a joint (C joint) 22.

  In the casing 10CA, a pair of left and right piston members 10R and piston members 10L extending along the axial direction of the casing 10CA and in sliding contact with the inner peripheral surface of the casing 10CA and a dome supported by the linking member 32 Slide valve 40 is provided. The internal space of the casing 10CA is formed between the pair of piston members 10R and 10L, and is a high pressure chamber 10B communicating with the above-mentioned opening 10P4, and a first member formed between one piston member 10L and the plug 10D2. It comprises an operating chamber 10A and a second operating chamber 10C formed between the other piston member 10R and the plug 10D1. Further, in the dome-shaped slide valve 40, a communication space (hereinafter also referred to as a communication passage) 40PA is formed. The communication space 40PA brings the port 30P2 on the outflow side of the valve seat 30 into communication with the port 30P3 on the indoor side according to the position of the slide valve 40 (see FIG. 3), or the port 30P2 on the outflow side and the port on the outdoor side 30P1 is made to communicate.

  The pilot valve unit 12 is a pilot slide valve disposed inside the high-pressure joint pipe 12P4 connected to the electromagnetic switching unit 12V, the low-pressure joint pipe 12P3, two switching joint pipes 12P1 and 12P2, and the electromagnetic switching unit 12V ( (Not shown) and a lead 12b for energizing the electromagnetic coil 12B. The high pressure joint pipe 12P4 of the pilot valve portion 12 is connected to the joint 28 of the valve body portion 10. The low pressure joint pipe 12P3 is connected to the joint 24 of the valve body 10. The switching joint pipe 12P2 is connected to the first working chamber 10A of the valve body 10, and the switching joint pipe 12P1 is connected to the second working chamber 10C of the switching valve.

  Such a switching valve 10 slides the slide valve 40 in one direction (left direction in FIG. 3) by the pressure of the high-pressure refrigerant introduced from the pilot valve portion 12 into the second working chamber 10C of the valve body portion 10. And the cooling mode in the refrigeration cycle system. In such a cooling mode, the port 30P2 on the outflow side and the port 30P3 on the indoor side are communicated by the communication space 40PA of the slide valve 40, and the opening 10P4 and the valve via the high pressure chamber 10B of the valve main body 10 The outdoor side port 30P1 of the seat 30 is in communication.

  On the other hand, the switching valve 10 slides the slide valve 40 in the other direction (rightward direction in FIG. 3) by the pressure of the high pressure refrigerant introduced from the pilot valve portion 12 into the first working chamber 10A. It is considered as the heating mode. In such a heating mode, the port 30P2 on the outflow side and the port 30P1 on the outdoor side are communicated by the communication space 40PA of the slide valve, and the opening 10P4 and the port 30P3 on the indoor side communicate via the high pressure chamber 10B. Be done. Then, during the operation of the refrigeration cycle system, the high pressure refrigerant acts on the outer peripheral portion of the slide valve 40, and the low pressure refrigerant acts on the inner peripheral portion of the slide valve 40.

  The slide valve 40 is made of, for example, a resin material such as nylon or polyphenylene sulfide (PPS) having heat resistance and pressure resistance. As shown in FIG. 1, the slide valve 40 has a sliding contact surface 40a in sliding contact with the sealing surface 30a of the above-mentioned valve seat 30 on the periphery of the opening 40H at the lower end. Both ends of the opening 40H have a semicircular shape corresponding to the circular cross section of the port 30P2 and the port 30P3 of the valve seat 30. The central portion of the opening 40H connected to the both ends is narrowed relative to the both end portions as it approaches a groove 40G described later.

  The opening 40H communicates with a communication passage 40PA (see FIGS. 2A and 2B) formed inside the slide valve 40 and having a dome-like cross section. The communication passage 40PA brings the port 30P1 of the valve seat 30 into communication with the port 30P2, or brings the port 30P2 of the valve seat 30 into communication with the port 30P3. 4 and 5 show the position of the slide valve 40 in a state in which the port 30P2 of the valve seat 30 and the port 30P3 are in communication with each other.

  The communication passage 40PA has a pair of long side walls (hereinafter also referred to as a first wall 40W1) facing along the X coordinate axis of the slide valve 40 and a short side facing along the Y coordinate axis of the slide valve 40. Formed by a pair of wall portions (hereinafter also referred to as a second wall portion 40W2) and an upper wall portion connecting the pair of first wall portions 40W1 and the pair of second wall portions 40W2 ing.

The lower end portion of each first wall portion 40W1 has a protruding portion 40T protruding outward along the Y coordinate axis, as shown in FIG. The lower end portion of each second wall portion 40W2 includes a protruding portion 40K that protrudes outward along the X coordinate axis.
A groove 40G is provided in the vicinity of the lower end of the central portion of the wall portion on the inner peripheral portion of the pair of first wall portions 40W1. As shown in FIG. 3, the end portions thereof are fixed by press-fitting so that reinforcing pins 42 described later straddle the pair of first wall portions 40W1. The curved surface provided on the periphery of the groove 40G in each first wall 40W1 is formed such that the thickness of the first wall 40W1 gradually increases as it approaches the groove 40G from both ends of the opening 40H. Therefore, as shown in FIG. 3, in each first wall portion 40W1, the thickness tb of the peripheral edge of the groove 40G is larger than the thickness ta in the vicinity of both ends of the opening 40H. As a result, a thick reinforcing portion 40HWT is formed on the periphery of the groove 40G in each first wall portion 40W1, so that the strength of the periphery of the groove 40G is improved. Further, since the inner peripheral surface of the reinforcing portion 40HWT is formed by the curved surface, the pressure loss in the communication passage 40PA can be suppressed, and the flow rate reduction in the communication passage 40PA can be reduced.

  The reinforcing pin 42, which is a solid shaft, has a uniform diameter from one end to the other end. The diameter of the reinforcing pin 42 is set in the range of about 1 mm or more and 20 mm or less according to the size of the slide valve 40 and the pressure of the refrigerant acting on the outer peripheral portion of the slide valve 40. Further, the reinforcing pin 42 is disposed so as to have a predetermined gap exceeding zero between the outer peripheral surface of the reinforcing pin 42 and the sliding contact surface 40 a.

  In such a configuration, by moving the slide valve 40 to a predetermined position, the pilot valve unit 12 switches the state to the cooling operation state or the heating operation state. In the cooling operation state, as shown in FIG. 4, the high-pressure refrigerant from the compressor 14 is supplied to the outdoor heat exchanger 16 which functions as a condenser. On the other hand, in the heating operation state, the high-pressure refrigerant from the compressor 14 is supplied to the indoor heat exchanger 20 which functions as a condenser.

  When the position of the slide valve 40 shown in FIG. 1 used in an example of the slide type switching valve according to the present invention is in the cooling operation state shown in FIGS. 4 and 5, that is, the communication passage 40PA of the slide valve 40 At a position where the port 30P2 and the port 30P3 are in communication, the slide valve 40 is in a position where the inner peripheral edge of the reinforcing portion 40HWT does not protrude to the open end of the port 30P2 and the port 30P3. Further, as shown in FIG. 2B, the cross-sectional area of the communication passage 40PA is larger than any of the cross-sectional areas of the port 30P2 and the port 30P3.

  As a result, during the cooling operation, a decrease in flow rate on the low pressure side of the slide valve 40 can be suppressed, and a decrease in efficiency of the refrigeration cycle system can be avoided.

  When the refrigeration cycle system switches from the cooling operation state to the heating operation state described above, the slide valve 40 is slid rightward from the state shown in FIG. 4. In the middle of the movement, the inner circumferential surface of the reinforcing portion 40HWT crosses the port 30P2, and then the slide valve 40 stops at a position where the communication passage 40PA communicates the port 30P2 with the port 30P1. Accordingly, when the refrigeration cycle system is in the heating operation state, the slide valve 40 is in a position where the inner peripheral edge of the reinforcing portion 40HWT does not protrude to the opening end of the port 30P2 and the port 30P1. Further, as shown in FIG. 2B, the cross-sectional area of the communication passage 40PA is larger than any of the cross-sectional areas of the port 30P2 and the port 30P1.

  Thereby, during the heating operation, the decrease in the flow rate on the low pressure side of the slide valve 40 can be suppressed, and the efficiency decrease of the refrigeration cycle system can be avoided.

  FIG. 6 shows another example of the slide valve used in an example of the slide type switching valve according to the present invention. In FIG. 6, the same components as those in the example shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

The slide valve 50 is made of, for example, a resin material such as nylon or polyphenylene sulfide (PPS) having heat resistance and pressure resistance. The slide valve 50 has a sliding contact surface 50a in sliding contact with the sealing surface 30a of the above-mentioned valve seat 30, on the periphery of the opening 50H at the lower end. Both ends of the opening 50H have semicircular shapes corresponding to the circular cross sections of the port 30P2 and the port 30P3 of the valve seat 30, respectively. In the central portion of the opening 50H connected to the both ends, a part in the vicinity of the periphery of a groove 50G described later is narrower than the portions at both ends.
The opening 50H communicates with the communication passage 50PA formed inside the slide valve 50 and having a dome-like cross section. The communication passage 50PA brings the port 30P1 of the valve seat 30 into communication with the port 30P2, or brings the port 30P2 of the valve seat 30 into communication with the port 30P3.

  Communication passage 50PA includes a pair of long side walls (hereinafter also referred to as first wall 50W1) facing along the X coordinate axis of slide valve 50 and a short side facing along the Y coordinate axis of slide valve 50. Is formed by being surrounded by a pair of wall portions (hereinafter also referred to as a second wall portion) and an upper wall portion connecting the pair of first wall portions 50W1 and the pair of second wall portions .

  The lower end portion of each first wall portion 50W1 has an overhang portion 50T which protrudes outward along the Y coordinate axis. The lower end of each second wall has an overhang 50K that protrudes outward along the X coordinate axis.

  A groove 50G is provided in the vicinity of the lower end portion of the central portion on the inner peripheral portion of the pair of first wall portions 50W1. The end portion of the reinforcing pin 42 is fixed to the groove 50G by press fitting so that the reinforcing pin 42 straddles the pair of first wall portions 50W1. On the periphery of the groove 50G in each first wall 50W1, two protrusions having a rectangular cross section are provided. The thickness of the peripheral edge of the groove 50G is formed to be partially larger than the thickness near both ends by these two protrusions. As a result, a thick reinforcing portion 50HWT is formed on the peripheral edge of the groove 50G in the first wall portion 50W1.

  FIG. 7 shows still another example of the slide valve used in an example of the slide type switching valve according to the present invention. In FIG. 7, the same components as those in the example shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

  The slide valve 60 is made of, for example, a resin material such as nylon or polyphenylene sulfide (PPS) having heat resistance and pressure resistance. The slide valve 60 has a sliding contact surface 60a in sliding contact with the sealing surface 30a of the valve seat 30 described above on the periphery of the opening 60H at the lower end. Both ends of the opening 60H have substantially semicircular shapes corresponding to the circular cross sections of the port 30P2 and the port 30P3 of the valve seat 30, respectively. In the central portion of the opening 60H connected to the both ends, the vicinity of the periphery of a groove 60G described later is narrower than the portions at both ends. The peripheries of both ends of the central portion of the opening 60H intersect the arc 60Ha and the arc 60Hb that form a part of the opening 60H, respectively. Each of the arcs 60Ha and 60Hb has a predetermined central angle (180 degrees + 2α). The angle α is set, for example, in the range of 0 degrees <α ≦ 45 degrees.

  The opening 60H is in communication with the communication passage 60PA formed inside the slide valve 60 and having a dome-like cross section. The communication passage 60PA brings the port 30P1 of the valve seat 30 into communication with the port 30P2, or brings the port 30P2 of the valve seat 30 into communication with the port 30P3.

  Communication passage 60PA has a pair of long side walls (hereinafter also referred to as first wall 60W1) facing along the X coordinate axis of slide valve 60 and a short side facing along the Y coordinate axis of slide valve 60. Is formed by being surrounded by a pair of wall portions (hereinafter also referred to as a second wall portion) and an upper wall portion connecting the pair of first wall portions 60W1 and the pair of second wall portions .

  The lower end portion of each first wall portion 60W1 includes an overhang portion 60T that protrudes outward along the Y coordinate axis. The lower end of each second wall has an overhang 60K projecting outwardly along the X coordinate axis.

  A groove 60G is provided in the vicinity of the lower end portion in the central portion of the inner peripheral portion of the pair of first wall portions 60W1. The end portion of the reinforcing pin 42 is fixed to the groove 60G by press fitting so that the reinforcing pin 42 straddles the pair of first wall portions 60W1. The periphery of the groove 60G in each first wall 60W1 is a circle further from the semi-circle corresponding to the ports 30P2 and 30P3 of the valve seat 30 in the opening 60H described above in the thickness of the first wall 60W1 to the groove 60G side It is formed partially large from each end of arcs 60Ha and 60Hb circumferentially extending by an angle α to grooves 60G. Thus, in each first wall 60W1, the thick reinforcing portion 60HWT extends from each end of one semicircle in the opening 60H to each end of the other semicircle. It will be formed on the periphery. Therefore, the strength of the reinforcing portion 60HWT is improved as compared with the example shown in FIGS. 3 and 6.

  Also in the embodiment shown in FIGS. 6 and 7, when the slide valve 50 or the slide valve 60 is stopped, the inner peripheral edge of the reinforcing portion 50HWT and the reinforcing portion 60HWT is the port 30P1 and the port 30P2 or the port 30P2 and the port 30P3 are in a position where they do not overhang. Further, the cross-sectional area of the communication passage 50PA or the communication passage 60PA is larger than the cross-sectional area of any of the port 30P1, the port 30P2, and the port 30P3.

  Although the example which used an example of the slide type switching valve which concerns on this invention for the air conditioner was mentioned and demonstrated, you may use for not only this but another refrigeration system.

DESCRIPTION OF SYMBOLS 10 valve main-body part 12 pilot valve part 30 valve seat 40, 50, 60 slide valve 40G, 50G, 60G groove 40HWT, 50HWT, 60HWT reinforcement part 42 reinforcement pin

Claims (7)

A valve seat in which a plurality of ports to which each pipe is connected is arranged in a line, and a communication passage communicating the fluid inlet / outlet port at the valve seat through an opening on the sealing surface of the valve seat A valve main body including a slide valve movably disposed, a piston member for driving the slide valve, and a pilot valve for driving and controlling the piston member in the valve main body;
The slide valve includes a pair of first wall portions that form a part of the communication passage, and a reinforcing pin disposed across the lower portion of the first wall portion.
The inner peripheral portions of the pair of first wall portions include a groove to which both ends of the reinforcing pin are fixed, and a thick reinforcing portion formed on the peripheral edge of the groove and the peripheral edge of the opening. Have
The slide type switching valve according to claim 1, wherein the reinforcement portion is provided at a position where the peripheral edge of the reinforcement portion does not protrude to the opening end of the fluid inlet / outlet port when the slide valve is stopped.   The sliding switch valve according to claim 1, wherein a portion of the reinforcing portion that forms a part of the communication passage has a curved surface.   The portion of the reinforcing portion that forms a part of the communication passage extends from the peripheral edge of the groove of the inner peripheral portion of the first wall portion and reaches the vicinity of the fluid inlet / outlet port in the valve seat. Slide-type switching valve described.   The slide according to claim 1, wherein a portion of the reinforcing portion which forms a part of the communication passage extends from the periphery of the groove of the inner peripheral portion of the first wall portion and reaches the vicinity of the upper portion of the communication passage. Type switching valve.   The slide switch valve according to claim 1, wherein the reinforcing portion traverses at least a fluid inflow port when the slide valve moves.   The cross-sectional area of the communication passage of the slide valve is set larger than the cross-sectional area of a port in communication with the communication passage of the slide valve in the valve seat. The slide type switching valve according to any of the above.   A compressor, an evaporator, and a condenser are provided, and the slide type switching valve according to any one of claims 1 to 6 is selectively switched from the compressor. The refrigeration cycle system according to claim 1, wherein the refrigerant is supplied to the condenser.

Images