Slide-type switching valve and refrigeration cycle system provided with same

Abstract

Provided are a sliding switching valve capable of suppressing vibration of an electromagnetic drive unit, and a refrigeration cycle system provided with the bracket. By forming the upright plate part (2) in the bracket (1) into a curved surface shape, deformation such as toppling when a force in the X direction is applied to the upright plate part (2) is easily suppressed compared with a planar structure extending along the YZ plane. Vibration of the electromagnetic drive unit (102) can be suppressed by supporting the valve body (120) of the electromagnetic drive unit (102) by means of the outer edge portions (24) of the pair of opposing plate portions (2).

Description

Technical Field

[0001] The present invention relates to a slide-type switching valve and a refrigeration cycle system including the slide-type switching valve. Background Art

[0002] Typically, refrigeration cycle systems use a sliding switching valve in which an electromagnetic drive unit controls the sliding movement of a valve core on a valve seat surface within the sliding switching valve body. Previously, a flow path switching valve with a mounting hardware for mounting a pilot drive unit serving as the electromagnetic drive unit has been proposed (for example, see Patent Document 1). The flow path switching valve described in Patent Document 1 employs a pressing portion formed on the mounting hardware to suppress the rattling of the pilot drive unit.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-112437 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the flow path switching valve described in Patent Document 1, even if it is possible to suppress the shaking between the mounting hardware and the pilot drive unit, it is difficult to suppress the deformation of the mounting hardware itself. The electromagnetic drive unit includes a coil and a magnet, which easily increases in weight. Therefore, deformation of the mounting hardware can easily cause vibration. In addition, when the electromagnetic drive unit vibrates, abnormal vibrations may sometimes occur depending on the relationship between the vibration direction and the direction of movement of the electromagnetic drive unit. Therefore, it is desirable to suppress the vibration of the electromagnetic drive unit by using a component used to mount the electromagnetic drive unit on the main body of the sliding switching valve.

[0008] An object of the present invention is to provide a slide-type switching valve capable of suppressing vibration of an electromagnetic drive unit, and a refrigeration cycle system including the slide-type switching valve.

[0009] Means for solving problems

[0010] A sliding switching valve according to the present invention includes: a sliding switching valve body; an electromagnetic drive unit capable of slidingly moving a valve element of the sliding switching valve body to control switching of a flow path; and a bracket for mounting the electromagnetic drive unit relative to the sliding switching valve body. The sliding switching valve is characterized in that the sliding switching valve body has a cylindrical valve body that houses the valve element, the electromagnetic drive unit includes an attracting element; a coil for energizing the attracting element; a plunger moved by the attracting element; and a cylindrical portion that houses the plunger and the attracting element. The bracket mounts the cylindrical portion to the outer peripheral surface of the valve body such that the axes of the valve body and the cylindrical portion extend along each other, and includes a pair of upright plates extending from the outer peripheral surface toward the outer peripheral side and arranged side by side in the direction of the axis. The upright plates extend along a plane intersecting the direction of the axis, support the cylindrical portion on the outer peripheral side, and have a curved surface portion including at least one portion that protrudes toward either side in the direction of the axis.

[0011] According to the present invention described above, by forming the upright plate portion into a curved surface, deformation such as tipping over when a force perpendicular to the axis of the slide-type switching valve body and the electromagnetic drive portion is applied can be suppressed, compared to a planar structure extending perpendicularly to the axis of the slide-type switching valve body and the electromagnetic drive portion. By supporting the cylindrical portion with the outer circumference of the pair of upright plates, vibration of the electromagnetic drive portion (particularly vibration in the direction of the axis) can be suppressed.

[0012] In the sliding switching valve of the present invention, the inner edge of the upright plate portion on the sliding switching valve body side preferably includes an arc-shaped portion along the outer peripheral surface. With this structure, when the bracket and the valve body are joined by brazing or the like, the joint area between them is increased, making it easier to ensure joint strength.

[0013] Furthermore, in the sliding switching valve of the present invention, the curvature of the arc-shaped portion of the inner edge is preferably smaller than the curvature of the outer peripheral surface. With this configuration, when a portion of the outer peripheral surface of the valve body of the sliding switching valve body contacts the circumferential center of the inner edge of the upright plate, a small gap can be formed between the outer peripheral surface of the valve body and the inner edge of the upright plate at a position across the circumferential contact portion. This allows the brazing filler metal to penetrate this gap during brazing, thereby increasing the joint strength.

[0014] In addition, in the sliding switching valve of the present invention, it is preferred that a foot portion is further provided, which extends from the inner edge portion in any direction of the direction of the axis and along the outer peripheral surface. According to such a structure, when the bracket is joined to the valve body by brazing or the like, the joining area therebetween can be increased to ensure the joining strength, thereby suppressing the deformation of the upright plate portion. For example, in the case where the upright plate portion has a pair of end edges extending from the inner edge portion toward the outer peripheral side of the sliding switching valve body and a convex portion between the pair of end edges and is bent, there is a case where the pair of end edges are deformed in a manner of approaching or separating from each other (in a manner of changing curvature). The foot portion extends in a manner that intersects with the upright plate portion, so that such deformation can be suppressed.

[0015] Furthermore, the slide-type switching valve of the present invention preferably further includes a top plate portion connecting the outer edge portions of the pair of upright plate portions on the electromagnetic drive portion side, the top plate portion having a mounting surface that extends in a curved shape along the cylindrical portion and faces the cylindrical portion. This configuration increases the joint area between the bracket and the cylindrical portion when brazing or the like is used, thereby ensuring joint strength.

[0016] In the sliding switching valve of the present invention, the top plate preferably includes a plurality of protrusions projecting from the mounting surface. This configuration creates a gap between the mounting surface and the cylindrical portion, allowing the brazing filler metal to penetrate the gap during brazing, thereby improving joint strength. Furthermore, the protrusions and cylindrical portion can be temporarily secured together, for example, by resistance welding, thereby improving workability.

[0017] Furthermore, in the sliding switching valve of the present invention, the curvature of the mounting surface is preferably greater than that of the cylindrical portion, and at least one of the protrusions is provided on either side of the cylindrical portion, sandwiching the cylindrical portion's circumferential center. With this configuration, when the cylindrical portion and the protrusion are in contact, a gap is easily maintained between the circumferential center of the mounting surface and the cylindrical portion, facilitating resistance welding as described above. Specifically, when the curvature of the cylindrical portion is large, the cylindrical portion is more likely to enter between the protrusions on either side, sandwiching the central portion, and making contact between the cylindrical portion and the central portion. In contrast, the aforementioned curvature relationship prevents such entry of the cylindrical portion.

[0018] Furthermore, in the slide-type switching valve of the present invention, the top plate preferably has a cutout portion on at least one of a pair of end edges extending along the axis. With this configuration, portions of the electromagnetic drive unit that are larger in diameter or protrude relative to other portions (e.g., the valve seat), piping, etc., can be arranged within the cutout portion, thereby preventing interference between these portions and the bracket.

[0019] In the sliding switching valve of the present invention, preferably, at least the pair of upright plates and the top plate are integrally formed from a single plate. With such a structure, the bracket can be formed by plastically deforming the plate, for example, by press working, thereby reducing manufacturing costs.

[0020] The refrigeration cycle system of the present invention is characterized by comprising: a compressor that compresses a refrigerant serving as a fluid; a first heat exchanger that functions as a condenser in a cooling mode; a second heat exchanger that functions as an evaporator in a cooling mode; an expansion mechanism that expands and decompresses the refrigerant between the first and second heat exchangers; and the aforementioned slide-type switching valve. The refrigeration cycle system of the present invention can suppress vibration of the electromagnetic drive unit as described above.

[0021] Effects of the Invention

[0022] According to the slide-type switching valve and the refrigeration cycle system of the present invention, vibration of the electromagnetic drive unit can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a refrigeration cycle provided with a slide-type switching valve according to an example embodiment of the present invention.

[0024] Figure 2 It is a plan view showing a state in which an electromagnetic drive unit is mounted on a slide-type switching valve body via a bracket in the slide-type switching valve.

[0025] Figure 3 It is a side view showing a state in which the electromagnetic drive unit is mounted on the slide-type switching valve body via the bracket.

[0026] Figure 4 It is a perspective view showing the bracket when viewed from above.

[0027] Figure 5 It is a perspective view showing the bracket when viewed from below.

[0028] Figure 6 It is a top view showing the bracket when viewed from below.

[0029] Figure 7 It is along Figure 6 Cross-sectional view along line AA.

[0030] Figure 8 It is a side view showing the bracket. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be described with reference to the accompanying drawings. Figure 2 、 Figure 3As shown, the slide-type switching valve 200 of this embodiment includes a four-way switching valve body 101 as the slide-type switching valve body, a pilot solenoid valve, i.e., an electromagnetic drive unit 102, which switches and controls the flow path of the four-way switching valve body 101, and a bracket 1 for mounting the electromagnetic drive unit 102 on the four-way switching valve body 101, for example, Figure 1 Refrigeration cycle 100 as shown. Furthermore, the sliding switching valve may include a switching valve other than a four-way switching valve as the main body of the sliding switching valve. Refrigeration cycle 100 is used in air conditioners such as room air conditioners, package air conditioners, and multi-split air conditioners. It includes a compressor 103 that compresses a refrigerant as a fluid; an outdoor heat exchanger 104 that functions as a first heat exchanger and a condenser in cooling mode; an indoor heat exchanger 105 that functions as a second heat exchanger and an evaporator in cooling mode; an expansion valve 106 that expands and decompresses the refrigerant between the outdoor heat exchanger 104 and the indoor heat exchanger 105; and a sliding switching valve 200. These are connected by refrigerant piping. The expansion mechanism is not limited to the expansion valve 106; a capillary tube may also be used.

[0032] The refrigeration cycle 100 Figure 1 In the cooling mode (cooling operation) indicated by the solid arrows, a refrigeration cycle is formed in which the refrigerant flows in the order of the compressor 103, the four-way switching valve body 101, the outdoor heat exchanger 104, the expansion valve 106, the indoor heat exchanger 105, the four-way switching valve body 101, and the compressor 103. On the other hand, in the heating mode (heating operation) indicated by the dotted arrows, a heating cycle is formed in which the refrigerant flows in the order of the compressor 103, the four-way switching valve body 101, the indoor heat exchanger 105, the expansion valve 106, the outdoor heat exchanger 104, the four-way switching valve body 101, and the compressor 103. Switching between the heating cycle and the refrigeration cycle is performed by switching the four-way switching valve body 101 by the electromagnetic drive unit 102.

[0033] The four-way switching valve body 101 is well-known and comprises a cylindrical valve body 111, a slide valve 112 slidably disposed within the valve body and capable of switching its position, a high-pressure conduit (D-connector) 113 communicating with the discharge port of the compressor 103, a low-pressure conduit (S-connector) 114 communicating with the suction port of the compressor 103, an indoor conduit (E-connector) 115 communicating with the indoor heat exchanger 105, and an outdoor conduit (C-connector) 116 communicating with the outdoor heat exchanger 104. The valve body 111 is formed as a completely sealed cylinder by plugs 117 and 118 that close its axial ends. Spaces A11 and A12 are defined, axially separating a piston 119 that moves the slide valve 112.

[0034] The electromagnetic drive unit 102 of this embodiment is a well-known component having the structure of a four-way switching valve. It comprises a valve body 120, a valve seat 121, a valve core 122, an electromagnetic drive unit 123, and joint components 124-127. The flow path of the fluid is switched by moving the valve core 122 in a predetermined sliding direction (i.e., a moving direction). Specifically, the electromagnetic drive unit 123 comprises a plunger 128, an attractor 129, and a coil 130. When coil 130 is energized, the attractor is energized, causing the valve core 122, which is held by the plunger 128, to move. By switching the flow path within the electromagnetic drive unit 102, the high-pressure fluid in the high-pressure conduit 113 is directed into one of the spaces A11 and A12 axially separating the piston 119, while the low-pressure fluid in the low-pressure conduit 114 is directed into the other space, causing the piston 119 to move toward the low-pressure space.

[0035] The bracket 1 mounts the valve body 120, which is the cylindrical portion of the electromagnetic drive unit 102, on the outer circumferential surface 111A of the cylindrical valve body 111 of the four-way selector valve body 101. The axes of the valve body 111 and the valve body 120 extend parallel to each other (in this embodiment, parallel to each other). The directions of these axes coincide with the sliding directions of the sliding valve 112 and the valve element 122. Hereinafter, the directions of the axes of the valve bodies 111 and 120 will be referred to as the X-direction, the direction in which the valve bodies 111 and 120 are aligned will be referred to as the Z-direction, and the direction orthogonal to both the X-direction and the Z-direction will be referred to as the Y-direction. The valve body 111 side (the four-way selector valve body 101 side) in the Z-direction will sometimes be referred to as the lower side, and the valve body 120 side (the electromagnetic drive unit 102 side) will sometimes be referred to as the upper side. This up-down relationship is for convenience; the Z-direction does not necessarily coincide with the vertical direction.

[0036] like Figures 4 to 8 As shown, the bracket 1 includes a pair of upright plates 2, a top plate 3, and a pair of legs 4. The bracket 1 is formed by, for example, plastically deforming a metal plate made of stainless steel or the like by press working, thereby integrally forming the pair of upright plates 2, the top plate 3, and the pair of legs 4.

[0037] The upright plate portion 2 extends outward from the outer peripheral surface 111A of the valve body 111 in the four-way switching valve body 101, extending generally along the YZ plane, a plane orthogonal to the axial direction, or the X direction. A pair of upright plate portions 2 are arranged at a predetermined interval in the X direction and are curved so as to convexly face toward each other in the X direction. Specifically, the upright plate portion 2 is formed into a curved surface having a pair of end edges 21 extending in the Z direction and a convex portion 22 between the pair of end edges 21, convex toward the other upright plate portion 2. The curved surface forms the entire surface.

[0038] The upright plate portion 2 has an upper inner edge portion 23 and a lower outer edge portion 24. The inner edge portion 23 is formed in an arc shape along the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101 and is concave when viewed from the four-way switching valve body 101. The outer edge portion 24 has an arc-shaped portion along the outer peripheral surface 120A of the valve body 120 of the electromagnetic drive unit 102 and is concave when viewed from the electromagnetic drive unit 102. Furthermore, the outer edge portion 24 has portions extending linearly along the Y direction on both sides of the arc-shaped portion.

[0039] The top plate portion 3 connects the outer edge portions 24 of the pair of upright plates 2 and includes a curved portion 3A connecting the arc-shaped portions of the outer edge portions 24 and a pair of flat portions 3B connecting the linear portions. The curved portion 3A is formed into a curved surface (a portion of a cylinder) along the outer peripheral surface 120A of the valve body 120 of the electromagnetic drive unit 102, and the pair of flat portions 3B extend along the XY plane on either side of the curved portion 3A in the Y direction. In other words, the curved portion 3A appears concave when viewed from the electromagnetic drive unit 102. At this point, the outer edge 24 is smoothly connected to the top plate portion 3, and the outer edge 24, along the extended arc, becomes a portion of the cylinder along which the curved portion 3A extends.

[0040] The top plate 3 has a placement surface 31 facing upward and a plurality of (four in this embodiment) protrusions 32 as recesses protruding from the placement surface 31 on the curved surface 3A. A pair of flat surfaces 3B each have a cutout 33. Thus, when the valve body 120 is placed on the upper side of the top plate 3, the outer peripheral surface 120A contacts the protrusions 32 instead of the placement surface 31. The four protrusions are arranged at the four corners of the top plate 3, which is a quadrilateral in plan view (see FIG. 1 ). Figure 6 ).

[0041] The flat portion 3B has a cutout 33 formed at the end edge extending in the X direction. The portion of the electromagnetic drive unit 102 that is formed to have a larger diameter or protrude than other portions (e.g., the valve seat portion), piping, etc. are arranged in the cutout 33. In addition, the electromagnetic drive unit 102 is sometimes configured so that the valve seat portion protrudes only from one side in the Y direction. However, by forming the cutout 33 on both sides, the valve seat portion can be arranged in the cutout 33 even when the direction of the bracket 1 is reversed 180 degrees. The shape of the cutout 33 is not limited to Figure 6 Such a rectangular shape may also be a V-shape, a U-shape, or the like.

[0042] The pair of legs 4 are continuous with the inner edges of the pair of upright plates 2, forming a curved surface that follows the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101. The inner edge 23 smoothly connects to the legs 4, forming a portion of the cylindrical shape along which the legs 4 extend, along the extended arc. Furthermore, the legs 4 extend in the X direction toward the side away from the other upright plates 2, that is, toward the side opposite the convex portion 22 (i.e., the concave side).

[0043] The inner edge portion 23 and leg portion 4 of the bracket 1 are joined to the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101, for example, by brazing, and the outer edge portion 24 and top plate portion 3 are joined to the outer peripheral surface 120A of the valve body 120 of the electromagnetic drive unit 102, for example, by brazing. Thus, the electromagnetic drive unit 102 is attached to the four-way switching valve body 101 via the bracket 1. The detailed shapes of these joints and the specific joining method are described below.

[0044] The curvature of the inner edge portion 23 and the leg portion 4 is smaller than the curvature of the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101. In other words, the inner edge portion 23 and the leg portion 4 have a curve that is gentler than the outer peripheral surface 111A. As a result, when the inner edge portion 23 and the leg portion 4 are brought into contact with the outer peripheral surface 111A, they are partially in contact. Specifically, when the outer peripheral surface 111A is brought into contact with the central portion in the Y direction (i.e., the central portion in the circumferential direction) of the inner edge portion 23 and the leg portion 4, a gap is formed between the inner edge portion 23 and the leg portion 4 and the outer peripheral surface 111A on both sides of the contact position in the Y direction.

[0045] When the inner edge portion 23 and the leg portion 4 are joined to the outer peripheral surface 111A by brazing, the brazing material flows into the above-mentioned gap.

[0046] The curvature of the arc-shaped portion of the outer edge portion 24 and the mounting surface 31 is greater than the curvature of the outer peripheral surface 120A of the valve body 120 of the electromagnetic drive unit 102. In other words, the arc-shaped portion of the outer edge portion 24 and the mounting surface 31 have a steeper curve than the outer peripheral surface 120A. Figure 7 As shown, the projections 32 are provided on both sides of a center portion 3C in the Y direction (ie, a center portion in the circumferential direction) of the placement surface 31 .

[0047] By setting the curvature as described above, when the outer peripheral surface 120A contacts the protrusions 32 on both sides of the central portion 3C, the outer peripheral surface 120A does not contact the placement surface 31 between the protrusions 32. In other words, the gap between the outer peripheral surface 120A and the placement surface 31 between the protrusions 32 increases as it approaches the central portion 3C. The difference in curvature is set to a level that prevents the outer peripheral surface 120A from contacting the Y-direction ends of the placement surface 31 or the flat surface 3B.

[0048] As described above, after temporarily securing the protrusion 32 to the outer peripheral surface 120A by resistance welding, the brazing operation for final securing can be performed. When the arc-shaped portion of the outer edge 24 and the mounting surface 31 are joined to the outer peripheral surface 120A by brazing, the brazing material flows into the gap formed between the mounting surface 31 and the outer peripheral surface 120A as described above.

[0049] According to the above embodiment, by forming the upright plate portion 2 into a curved surface, deformation such as tipping over when a force in the X direction is applied to the upright plate portion 2 is more easily suppressed than with a planar structure extending along the YZ plane. By supporting the valve body 120 of the electromagnetic drive unit 102 with the outer edge portions 24 of the pair of upright plate portions 2, vibration of the electromagnetic drive unit 102 (particularly vibration in the X direction) can be suppressed.

[0050] Furthermore, by forming the upright plate portion 2 into a curved surface, the rigidity is increased, thereby increasing the resonant frequency and simplifying the design of the four-way switching valve body 101 and the electromagnetic drive portion 102. Furthermore, by suppressing the vibration of the electromagnetic drive portion 102 as described above, the upright plate portion 2 can be made thinner and less expensive.

[0051] In addition, by forming the inner edge portion 23 of the upright plate portion 2 into an arc shape along the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101, the joining area between the bracket 1 and the valve body 111 is increased when they are joined by brazing or the like, making it easier to ensure the joining strength.

[0052] Furthermore, since the curvature of the inner edge portion 23 is smaller than that of the outer peripheral surface 111A, a small gap can be formed between the outer peripheral surface 111A and the inner edge portion 23 , and the brazing material can penetrate into the gap to improve the bonding strength.

[0053] Furthermore, by providing the bracket 1 with the legs 4, the joint area between the bracket 1 and the valve body 111 can be increased, thereby ensuring joint strength when the bracket 1 and the valve body 111 are joined together by brazing or the like. Furthermore, since the legs 4 extend perpendicularly to the upright plate 2, deformation of the upright plate 2 in the form of deflection (such that the pair of end edges 21 move closer to or away from each other) can be suppressed.

[0054] In addition, since the top plate portion 3 has a placement surface 31 extending in a curved shape along the valve body 120 of the electromagnetic drive portion 102 and facing the valve body 120 side, when the bracket 1 and the valve body 120 are joined by brazing or the like, the joining area therebetween can be increased and the joining strength can be ensured.

[0055] Furthermore, by having multiple protrusions 32 protruding from the mounting surface 31 of the top plate 3, a gap can be formed between the mounting surface 31 and the valve body 120. During brazing, the brazing material can penetrate into this gap, thereby improving the joint strength. Furthermore, the protrusions 32 can be temporarily fixed to the valve body 120 by resistance welding, which can improve workability.

[0056] In addition, since the curvature of the supporting surface 31 is greater than that of the valve body 120 and convex portions 32 are provided on both sides of the circumferential center portion 3C, when the valve body 120 is in contact with the convex portions 32, it is easy to ensure a gap between the circumferential center portion 3C and the valve body 120, and it is easy to perform the resistance welding described above.

[0057] Furthermore, since the top plate 3 has the cutout 33 at the edge extending in the X direction, portions of the electromagnetic drive unit 102 that are larger in diameter or protrude than other portions, piping, etc., can be arranged in the cutout, thereby preventing them from interfering with the bracket 1 .

[0058] Furthermore, since the pair of upright plates 2 , the top plate 3 , and the pair of legs 4 are integrally formed from a single plate material, the bracket 1 can be formed by plastically deforming the plate material by, for example, press working, thereby reducing manufacturing costs.

[0059] The present invention is not limited to the above-described embodiment and encompasses other configurations that achieve the objectives of the present invention. The following modifications are also encompassed by the present invention. For example, in the above-described embodiment, the curvature of the inner edge portion 23 is smaller than the curvature of the outer peripheral surface 111A of the valve body 111 of the four-way switching valve body 101. However, these curvatures can be made equal, or the curvature of the inner edge portion can be made slightly larger. In other words, the curvature difference can be set to a degree that allows for mutual engagement.

[0060] Furthermore, in the above embodiment, the legs 4 extend from the pair of upright plates 2 in a manner spaced apart from each other. However, the legs may extend closer to each other, or may extend toward the same side in the direction of the axis. Furthermore, the legs may extend toward the convex side of the upright plate. Furthermore, the legs may be omitted, for example, if the thickness of the upright plate is sufficiently large to easily secure the bonding area with the outer peripheral surface 111A and the upright plate is less likely to deform.

[0061] Furthermore, in the above embodiment, the entire inner edge 23 of the upright plate 2 is formed into an arc shape, but a portion thereof may also be formed into an arc shape. Furthermore, depending on the manner in which the bracket supports the valve body of the four-way switching valve and the connection structure, the inner edge may not have an arc-shaped portion. For example, the bracket and the valve body may be provided with mutually engaging portions.

[0062] In the above embodiment, the curvature of the mounting surface 31 is greater than that of the valve body 120, but these curvatures may be equal to each other, or the curvature of the mounting surface may be slightly smaller. In other words, the curvature difference may be set to a degree that allows for mutual engagement.

[0063] In the above embodiment, the top plate 3 has the plurality of protrusions 32 protruding from the placement surface 31 . However, the protrusions may be omitted and the entire placement surface may be in contact with the cylindrical portion of the electromagnetic drive unit.

[0064] In the above embodiment, the top plate 3 has a placement surface 31 extending in a curved shape along the valve body 120 of the electromagnetic drive unit 102 and facing the valve body 120. However, depending on the manner in which the bracket supports the cylindrical portion of the electromagnetic drive unit and the connection structure, the top plate may not have a curved placement surface. For example, the bracket and the cylindrical portion may be provided with mutually engaging portions.

[0065] Furthermore, in the above embodiment, the pair of upright plate portions 2 , the top plate portion 3 , and the pair of leg portions 4 are integrally formed from a single plate member. However, the bracket may be constructed by joining a plurality of plate members.

[0066] In the above embodiment, the notches 33 are formed on both sides of the top plate 3, but a notch may be formed on only one side. Alternatively, depending on the shape of the various parts of the electromagnetic drive unit, the notch may not be formed if interference is less likely to occur.

[0067] Furthermore, in the above embodiment, the bracket 1 includes a top plate 3. However, the top plate 3 may be omitted, with the cylindrical portion of the electromagnetic drive unit supported solely by the upright plates. Even with this configuration, the upright plates are less likely to deform, and the cylindrical portion between the pair of upright plates is less likely to deform, thereby suppressing vibration of the electromagnetic drive unit.

[0068] Furthermore, in the above embodiment, the entire upright plate portion 2 is a curved surface portion. However, a portion of the upright plate portion may also be a curved surface portion. Furthermore, the shape of the curved surface portion is not limited to a shape that convexly projects toward one side of the other upright plate portion as in the above embodiment. It may also convexly project toward the opposite side, or may have a wave shape with multiple convex portions. Furthermore, the convex shape may be a smooth curved surface or a shape with a pointed apex.

[0069] Alternatively, the upright plate portion may be formed by combining multiple flat plate-like portions to project toward either side of the axis. For example, a V-shaped upright plate portion may be formed by combining two flat plate-like portions that are inclined relative to the YZ plane. Alternatively, a flat plate-like portion extending along the YZ plane and a flat plate-like portion extending along the ZX plane may be combined to form a stepped upright plate portion when viewed in the Z direction. As long as the upright plate portion includes a portion projecting toward either side of the X direction (axis direction), even if it includes the flat plate-like portion, it will include a surface that is inclined by rotation about the Z direction relative to the YZ plane, thereby suppressing deformation such as toppling when a force in the X direction is applied.

[0070] Furthermore, the upright plate portion need not include a portion protruding toward either side of the axis, and may simply include a surface that is inclined by rotation about the Z direction (the direction in which the valve body and the cylindrical portion face each other) relative to the YZ plane (a surface perpendicular to the axis). For example, a pair of upright plate portions may be inclined relative to the Y direction so as to approach each other in the X direction as they move from one side of the Y direction toward the other.

[0071] While the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also encompassed by the present invention.

[0072] Description of Reference Numerals

[0073] 1—bracket; 2—standing plate portion (curved portion); 23—inner edge portion; 24—outer edge portion; 3—top plate portion; 31—loading surface; 32—convex portion; 33—cutout portion; 4—foot portion; 100—refrigeration cycle; 101—four-way switching valve body (sliding switching valve body); 111—valve body; 111A—outer peripheral surface; 102—electromagnetic drive portion; 120—valve body (cylindrical portion); 103—compressor; 104—outdoor heat exchanger (first heat exchanger); 105—indoor heat exchanger (second heat exchanger); 106—expansion valve (expansion mechanism); 200—sliding switching valve.

Claims

1. A sliding switching valve comprising: a sliding switching valve body; an electromagnetic drive unit capable of slidingly moving a valve element of the sliding switching valve body to control switching of a flow path; and a bracket for mounting the electromagnetic drive unit relative to the sliding switching valve body. The sliding switching valve is characterized in that The slide-type switching valve body includes a cylindrical valve body that houses the valve element. The electromagnetic drive unit includes: an attracting member; a coil that excites the attracting member; a plunger that moves through the attracting member; and a cylindrical portion that accommodates the plunger and the attracting member. The bracket mounts the cylindrical portion on the outer peripheral surface of the valve body in such a manner that the axes of the valve body and the cylindrical portion extend along each other, and includes a pair of upright plates extending from the outer peripheral surface toward the outer peripheral side and arranged in parallel in the direction of the axis. The upright plate portion extends along a surface intersecting the axis direction, supports the cylindrical portion on the outer peripheral side, and has a curved surface portion including at least one portion convex toward either side in the axis direction.

2. The sliding switching valve according to claim 1, characterized in that An inner edge portion of the upright plate portion on the side of the slide-type switching valve body has an arc-shaped portion along the outer peripheral surface.

3. The sliding switching valve according to claim 2, characterized in that: The curvature of the arc-shaped portion of the inner edge portion is smaller than the curvature of the outer peripheral surface.

4. The sliding switching valve according to claim 2, characterized in that A leg portion is further provided, the leg portion extending from the inner edge portion toward any one direction of the axis and along the outer peripheral surface.

5. The sliding switching valve according to claim 1, wherein: The device further comprises a top plate portion connecting outer edge portions of the pair of upright plate portions on the electromagnetic drive portion side. The top plate portion has a placement surface that extends in a curved shape along the cylindrical portion and faces the cylindrical portion.

6. The sliding switching valve according to claim 5, characterized in that: The top plate portion has a plurality of protrusions protruding from the placement surface.

7. The sliding switching valve according to claim 6, characterized in that: The placement surface has a curvature greater than that of the cylindrical portion, and at least one of the protruding portions is provided on both sides of a central portion in a circumferential direction thereof.

8. The sliding switching valve according to claim 5, characterized in that The top plate portion has a cutout portion at at least one of a pair of end edges extending in the direction of the axis.

9. The sliding switching valve according to claim 5, characterized in that At least the pair of upright plate portions and the top plate portion are integrally formed from a single plate material.

10. A refrigeration cycle system, characterized in that: have: a compressor that compresses a refrigerant as a fluid; a first heat exchanger that functions as a condenser in a cooling mode; a second heat exchanger that functions as an evaporator in cooling mode; an expansion mechanism that expands and decompresses the refrigerant between the first heat exchanger and the second heat exchanger; and The sliding switching valve according to claim 1.

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