Sliding type switching valve and refrigeration cycle system

Abstract

The utility model aims to provide a sliding switching valve and a refrigeration cycle system, which can suppress the generation of cutting burrs during the processing of the valve seat component, and can prevent the occurrence of adverse conditions in the refrigeration cycle caused by foreign matter. The valve seat component (40) of the sliding switching valve has a sliding surface (41), a joint surface (42), and a first through hole (43) that passes from the sliding surface to the joint surface. The first through hole has a first port hole (43a) opened on the sliding surface, a first joint hole (43b) opened on the joint surface, and a first connecting hole (43c) that connects the first port hole and the first joint hole. The first connecting hole is inclined relative to the orthogonal direction (X) of the sliding surface, and its inner diameter is formed to be larger than the inner diameter of the first port hole. The first port hole is located within the circumference of the first connecting hole at the continuous portion with the first connecting hole.

Description

Technical Field

[0001] The utility model relates to a sliding switching valve and a refrigeration circulation system. Background Art

[0002] As a switching valve for switching the flow path of the refrigerant in a refrigeration cycle, etc., a sliding switching valve is known, which has a cylindrical valve body, a valve core slidably arranged inside the valve body, a valve seat arranged on the valve body, and a driving mechanism for slidingly driving the valve core in the axial direction (for example, refer to Patent Document 1). The valve seat has a plurality of (for example, 3) ports opened on the sliding contact surface for the valve core to slide, and a joint hole connected to each port from the opposite side of the sliding contact surface, and a pipe as a joint component is inserted into each joint hole. In this sliding switching valve, a plurality of ports are arranged in an axial direction, while the joint hole for connecting the pipe is larger than the port diameter, so it cannot be arranged coaxially with the port, and is staggered relative to each port in the axial direction and in a direction intersecting the axial direction. That is, when the port and the joint hole are viewed from the surface orthogonal to the sliding contact surface, a portion of the circumference of each other overlaps with each other, and the ports and the joint holes are connected through the overlapping portion.

[0003] Prior art literature

[0004] Patent Document 1: Japanese Patent Application Publication No. 2017-133663

[0005] However, in conventional slide-type switching valves, when the port and the joint hole are formed in the valve seat, cutting burrs are easily formed in the overlapping portion, and the cutting burrs may become foreign matter and cause malfunctions in the refrigeration cycle. Utility Model Content

[0006] The utility model aims to provide a sliding switching valve and a refrigeration cycle system, which can suppress the generation of cutting burrs when processing a valve seat component and can prevent the occurrence of adverse conditions in the refrigeration cycle caused by foreign matter.

[0007] In order to solve the above-mentioned problems and achieve the purpose, the sliding switching valve of the utility model comprises: a hollow cylindrical valve body; a valve seat component arranged on the valve body; a valve core arranged inside the valve body to slide freely along the axial direction; and a driving part that drives the valve core to slide, characterized in that the valve seat component has: a sliding surface for the sliding of the valve core; a joint surface located on the side opposite to the sliding surface; and a plurality of through holes that pass from the sliding surface to the joint surface, wherein the through holes have: a port hole opening on the sliding surface; a joint hole opening on the joint surface with an inner diameter larger than that of the port hole and into which the joint component is inserted; and a driving part that drives the valve core to slide. A connecting hole connecting the port hole and the connecting hole, the port holes among the multiple through holes are arranged in an array in the axial direction, a first through hole constituting at least one of the multiple through holes has a first port hole as the port hole, a first connecting hole as the connecting hole, and a first connecting hole as the connecting hole, the first connecting hole is inclined relative to the surface orthogonal to the sliding surface, and its inner diameter is larger than the inner diameter of the first port hole, the first port hole is located within the circumference of the first connecting hole at the continuous part with the first connecting hole, and the inner diameter of the first connecting hole is set to a size larger than the inner diameter of the first connecting hole.

[0008] According to the utility model, the first port hole and the first connector hole are connected via the first connecting hole that is inclined in a direction orthogonal to the sliding surface. The inner diameter of the first port hole is smaller than the inner diameter of the first connecting hole, and in the continuous portion between the first port hole and the first connecting hole, the entire circumference of the first port hole is located within the circumference of the first connecting hole. In addition, the inner diameter of the first connector hole is set to a size greater than the inner diameter of the first connecting hole. Therefore, the first through hole can be formed without interfering with the first port hole, the first connecting hole, and the first connector hole. Therefore, there will be no overlapping portion between the port and the connector hole as in the above-mentioned conventional sliding switching valve, and the generation of cutting burrs when forming the through hole can be suppressed. Therefore, a sliding switching valve can be obtained, which can suppress the generation of cutting burrs during the processing of the valve seat component, and can be less likely to cause adverse conditions in the refrigeration cycle caused by foreign matter.

[0009] In addition, at this time, it is preferred that the port hole of the second through hole different from the first through hole among the plurality of through holes, that is, the second port hole, is extended in the surface-orthogonal direction of the sliding surface and is formed to have an inner diameter smaller than the connecting hole of the second through hole, that is, the second connecting hole, the second connecting hole is extended in the surface-orthogonal direction of the sliding surface, the entire circumference of the second port hole is located within the circumference of the second connecting hole in the continuous portion between the second port hole and the second connecting hole, and the length of the first port hole in the through direction is formed to be shorter than the length of the second port hole in the through direction. According to such a structure, connecting holes with different extending directions such as the first connecting hole inclined with respect to the surface-orthogonal direction and the second connecting hole extending in the surface-orthogonal direction can be provided on the valve seat member, so that the plurality of connecting holes and the joint holes connected to the plurality of connecting holes can be prevented from interfering with each other. In addition, by forming the length of the first port hole in the through direction shorter than the length of the second port hole in the through direction, the continuous portion between the first port hole and the first connecting hole and the continuous portion between the second port hole and the second connecting hole can be staggered in the surface-orthogonal direction. That is, the portion where the inner diameter increases from the first port hole to the first connecting hole and the portion where the inner diameter increases from the second port hole to the second connecting hole can be staggered in the plane-orthogonal direction. Therefore, even when the first port hole and the second port hole are brought close to each other, the first connecting hole and the second connecting hole can be prevented from interfering with each other.

[0010] In addition, it is preferred that the inner diameter of the first connecting hole is smaller than the inner diameter of the first joint hole, the first connecting hole is located within the circumference of the first joint hole at the continuous portion with the first joint hole, the inner diameter of the second connecting hole is smaller than the inner diameter of the joint hole of the second through hole, that is, the second joint hole, the second connecting hole is located within the circumference of the second joint hole at the continuous portion with the second joint hole, and the length of the through direction of the first joint hole is formed to be longer than the length of the through direction of the second joint hole. According to such a structure, the port hole of the through hole adjacent to the first through hole and the connecting hole can be made close to the first through hole by the difference between the inner diameter of the first connecting hole and the inner diameter of the first joint hole. Therefore, compared with the structure in which the inner diameter of the first connecting hole is the same as the inner diameter of the first joint hole, the portion of the valve seat component for forming the through hole can be smaller, which can contribute to the miniaturization of the valve seat component. In addition, similarly, the port hole of the through hole adjacent to the second through hole, the connecting hole and the second through hole can be made close to the difference between the size of the inner diameter of the second connecting hole and the size of the inner diameter of the second joint hole. Therefore, compared with the structure in which the inner diameter of the second connecting hole is the same size as the inner diameter of the second joint hole, the portion of the valve seat component used to form the through hole can be smaller, which can contribute to the miniaturization of the valve seat component. In addition, by forming the length of the through direction of the first joint hole to be longer than the length of the through direction of the second joint hole, the continuous portion of the first joint hole and the first connecting hole and the continuous portion of the second joint hole and the second connecting hole can be staggered in the orthogonal direction of the surface. That is, the portion where the inner diameter increases from the first connecting hole to the first joint hole and the portion where the inner diameter increases from the second connecting hole to the second joint hole can be staggered in the orthogonal direction of the surface. Therefore, even when the first port hole and the second port hole are close to each other, the first joint hole and the second joint hole can be prevented from interfering with each other.

[0011] In addition, it is preferred that the joint holes among the plurality of through holes are arranged in the axial direction and open in the joint surface. According to such a structure, the plurality of joint holes are arranged in the axial direction and open in the joint surface, so compared with a structure in which one joint hole and another joint hole do not overlap each other when viewed from the axial direction and extend to one side and the other side of the width direction of the valve seat component orthogonal to the axial direction, respectively, the width dimension of the valve seat component can be reduced, which contributes to the miniaturization of the valve seat component.

[0012] In addition, it is preferred that the first joint hole is arranged parallel to and coaxially with the first connecting hole, and a conical surface extending in a direction intersecting the sliding surface and opening the first joint hole is provided on the joint surface. According to such a structure, when processing the first connecting hole inclined in a direction orthogonal to the sliding surface, the conical surface is first cut using a processing tool to form the first joint hole, and the first connecting hole can be formed by directly cutting at the same angle. Therefore, the first joint hole and the first connecting hole can be easily formed. In addition, since the conical surface extends in a direction intersecting the sliding surface, for example, the conical surface can also be formed to extend in a direction orthogonal to the through-direction of the first connecting hole. In this case, the processing tool can be made to abut the conical surface orthogonally. Therefore, the tool can be prevented from sliding relative to the conical surface, and the first joint hole and the first connecting hole can be easily and accurately formed.

[0013] In addition, the first through hole may be provided in plurality, the first joint hole extends parallel to the first port hole and opens at the joint surface, and the imaginary periphery formed by imaginary extension of the inclined first connecting hole to the joint surface is located within the circumference of the opening of the first joint hole. According to such a structure, when processing the first connecting hole inclined in the direction orthogonal to the sliding surface, the joint surface is first cut using a processing tool to form the first joint hole, and then the first connecting hole is cut by changing the angle, but the imaginary periphery formed by imaginary extension of the first connecting hole to the joint surface is located within the circumference of the opening of the first joint hole, so that the first connecting hole can be formed without the processing tool contacting the inner circumference of the first joint hole. Therefore, a sliding switching valve can be obtained, which can easily form the first connecting hole while suppressing the generation of cutting burrs when processing the valve seat component, and can be less likely to cause adverse conditions of the refrigeration cycle caused by foreign matter.

[0014] In addition, the valve seat component may also be made of stainless steel. Stainless steel is more likely to produce cutting burrs during processing than brass or other materials used as materials for valve seat components of conventional sliding switching valves. However, as described above, according to this structure, the generation of cutting burrs when forming the through hole can be suppressed. Therefore, the utility model can also be applied to valve seat components using materials that are prone to generating cutting burrs.

[0015] In addition, it is preferred that the distance in the axial direction from the center of one of the port holes respectively connected to the adjacent joint holes to the center of the other, i.e., the center-to-center distance, is smaller than the inner diameter of the adjacent joint hole. According to such a structure, in the axial direction, i.e., the sliding direction of the valve core, the more the center from one port hole to the center of the other port holes converges to a range smaller than the inner diameter of the joint hole, the smaller the center-to-center distance of the adjacent port holes can be, and thus the sliding distance of the valve core can be reduced. Therefore, for example, in the case where the drive unit is constituted by a device including a plunger and a suction member, the distance between the plunger and the suction member can be shortened, which can contribute to the miniaturization of the drive unit and the labor saving accompanying the miniaturization.

[0016] In addition, the refrigeration cycle system of the utility model is characterized in that it is equipped with the above-mentioned sliding switching valve. According to such a structure, the generation of cutting burrs during the processing of the valve seat component can be suppressed, and the refrigeration cycle system can be constructed using the sliding switching valve that is not prone to adverse conditions of the refrigeration cycle caused by foreign matter.

[0017] The effects of the utility model are as follows.

[0018] According to the utility model, a sliding type switching valve and a refrigeration cycle system can be provided, which can suppress the generation of cutting burrs when processing a valve seat component and can prevent the occurrence of refrigeration cycle failures caused by foreign matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a figure which shows an example of the refrigeration cycle system of this invention.

[0020] Figure 2 It is a cross-sectional view along the axis line of the slide type switching valve according to the embodiment of the present invention.

[0021] Figure 3 This is an enlarged cross-sectional view of a valve seat component constituting a slide-type switching valve.

[0022] FIG. 4(A) is a top view of the valve seat member, FIG. 4(B) is a cross-sectional view of the valve seat member, and FIG. 4(C) is a rear view of the valve seat member.

[0023] Figure 5 It is an enlarged cross-sectional view showing the dimensional relationship of the valve seat component.

[0024] 6(A), 6(B), and 6(C) are explanatory diagrams of a continuous portion between a port hole and a communication hole in a valve seat member.

[0025] 7(A) is a top view of a valve seat member according to a modification, FIG. 7(B) is a cross-sectional view of the valve seat member according to the modification, and FIG. 7(C) is a rear view of the valve seat member according to the modification.

[0026] Figure 8 It is an enlarged cross-sectional view showing the dimensional relationship of a valve seat member according to a modified example.

[0027] In the figure: L—axis line, X—orthogonal direction (plane orthogonal direction), 2—pilot valve (sliding switching valve), 31—valve body, 40—valve seat component, 41—sliding surface, 42—joint surface, 43—first through hole (multiple through holes), 43a—first port hole (port hole), 43c—first connecting hole (connecting hole), 43b—first joint hole (joint hole), 45—first working capillary (joint component), 50—valve core, 60—electromagnetic drive unit (drive unit). DETAILED DESCRIPTION

[0028] The following is based on Figure 1 to Figure 6 (A) , FIG. 6(B) and FIG. 6(C) illustrate the implementation mode of the present invention. In addition, in the following description, the direction in which the axis L of the plunger 61 described later extends is referred to as the "axis L direction", and the direction orthogonal to the axis L direction is referred to as the "orthogonal direction X". The orthogonal direction X is also a direction orthogonal to the sliding surface 41 of the valve seat component 40 described later, and is the surface orthogonal direction in the present invention. In addition, the definition of these directions is only for the convenience of explanation, and is not necessarily consistent with the directions in the actual use state of the present invention, and does not limit this direction. Figure 1 The refrigeration cycle system 100 according to the embodiment of the present invention is shown. The refrigeration cycle system 100 includes a four-way valve 1 , a pilot valve 2 (slide-type switching valve), an indoor heat exchanger 3 , a throttle device 4 , an outdoor heat exchanger 5 , and a compressor 6 .

[0029] The four-way valve 1 is a valve device that switches the flow path of the refrigerant by switching the connection state of four pipes. The four-way valve 1 includes a shell 10 and a sliding valve core 20 slidably provided in the shell 10. The shell 10 includes a cylindrical body 11 whose two ends are closed by cover parts. The body 11 is formed by stamping a metal plate made of stainless steel or the like. A D-joint pipe 12 as a high-pressure pipe for the flow of refrigerant is fixed to the side wall of the body 11 by brazing or the like in a state of being inserted in the plate thickness direction and connected to the inside of the body 11. In the side wall of the body 11, a portion opposite to the D-joint pipe 12 is fixed from Figure 1 On the left side in the figure, an E-joint pipe 13, an S-joint pipe 14, and a C-joint pipe 15 are fixed by brazing or the like in a state where they are inserted in the plate thickness direction, and are communicated with the inside of the main body 11, respectively.

[0030] The E-joint pipe 13, the S-joint pipe 14, and the C-joint pipe 15 are pipes for refrigerant flow, similar to the D-joint pipe 12, and function as high-pressure pipes or low-pressure pipes. The interior of the main body 11 is divided into three spaces by a piston 23 described later, and is composed of a high-pressure chamber 16 that is always connected to the D-joint pipe 12, a first working chamber 17 adjacent to the high-pressure chamber 16, and a second working chamber 18. The sliding valve core 20 is provided to be able to slide and move in the axial direction of the main body 11 inside the main body 11, and switch the communication state of the above-mentioned D-joint pipe 12, E-joint pipe 13, S-joint pipe 14, and C-joint pipe 15. The sliding valve core 20 includes a valve core main body 21, a connecting plate 22 that holds the valve core main body 21 and extends in the axial direction of the main body 11, and a pair of pistons 23 that are respectively provided at both ends of the connecting plate 22 in the extension direction and form a pair.

[0031] The valve body 21 is formed in a bowl shape so as to open toward the E-joint pipe 13, the S-joint pipe 14, and the C-joint pipe 15. The opening of the valve body 21 is formed to cover two adjacent openings of the E-joint pipe 13, the S-joint pipe 14, and the C-joint pipe 15. Figure 1 The left end position shown in the figure makes the E joint pipe 13 communicate with the S joint pipe 14, and makes the D joint pipe 12 communicate with the C joint pipe 15. Figure 1 When the valve body 21 moves to the right side in the middle and moves to the right end position (not shown), the C joint pipe 15 is connected to the S joint pipe 14, and the D joint pipe 12 is connected to the E joint pipe 13. The connecting plate 22 holds the valve body 21 in the axial center of the body 11 and extends to one side and the other side of the axial direction. A sealing component such as a gasket is installed on the piston 23, thereby dividing the interior of the body 11 into the above-mentioned three spaces.

[0032] Specifically, the space between the pair of pistons 23 constitutes the high pressure chamber 16. Figure 1 The left side of the first working chamber 17 and the high pressure chamber 16 are Figure 1 The right side of the second working room 18 is formed. Figure 1 In the refrigeration cycle system 100 shown, the D-joint pipe 12 is connected to the discharge port of the compressor 6, and the S-joint pipe 14 is connected to the suction port of the compressor 6. In addition, the C-joint pipe 15 is connected to the outdoor heat exchanger 5, and the E-joint pipe 13 is connected to the indoor heat exchanger 3. The outdoor heat exchanger 5 and the indoor heat exchanger 3 are connected to each other via the throttle device 4. In this way, the refrigeration cycle system 100 is constituted by a path constituted by the C-joint pipe 15, the outdoor heat exchanger 5, the throttle device 4, the indoor heat exchanger 3, and the E-joint pipe 13, and a path constituted by the S-joint pipe 14 to the compressor 6 and the D-joint pipe 12.

[0033] The pilot valve 2 is a sliding switching valve in the present invention, and is a direct-acting electromagnetic sliding valve that allows a driving fluid to flow between the sliding valve core 20 of the four-way valve 1 and the four-way valve 1. Figure 2 As shown in FIG. 1 , the pilot valve 2 includes: a valve housing 30 formed by stamping a stainless steel metal plate or the like; a valve seat member 40 mounted on the valve housing 30; a valve core 50 that slides on the valve seat member 40; and an electromagnetic drive unit 60 (drive unit) that drives the valve core 50 to slide. The valve housing 30 includes a bottomed cylindrical (i.e., hollow cylindrical) valve body 31 extending in the direction of the axis L. The interior of the valve body 31 constitutes one side of the axis L direction of the plunger 61 described later ( Figure 2 The valve chamber 32 on the left side of the piston 61 and the other side of the axis L direction ( Figure 2 The plunger configuration chamber 33 is formed on the side wall of the valve body 31. A first mounting hole 34 is formed in the orthogonal direction X. A D-type capillary 35 as a high-pressure pipe is fixed to the first mounting hole 34 by brazing or the like in an inserted state and communicates with the interior of the valve body 31. Figure 1 As shown, the D capillary tube 35 is connected to the D joint tube 12 of the above-mentioned four-way valve 1.

[0034] A second mounting hole 36 is formed through the side wall of the valve body 31 at a portion opposite to the D capillary 35 and extending in the orthogonal direction X. A valve seat member 40 is inserted into the second mounting hole 36. The valve seat member 40 is a member for sliding the valve core 50 and is formed into a cylindrical shape extending in the orthogonal direction X using a stainless steel material. Figure 2 As shown in FIG. 1 , the end surface of the valve seat member 40 on the inner side in the orthogonal direction X constitutes a sliding surface 41 for the valve core 50 to slide. The sliding surface 41 is a flat surface parallel to the axis L. On the other hand, the portion of the valve seat member 40 located on the outer side in the orthogonal direction X, that is, on the side opposite to the sliding surface 41, constitutes a joint surface 42 for connecting the joint member (first working capillary 45, second working capillary 46, S capillary 47) described later. Figure 3 As shown, the joint surface 42 includes a flat surface 42 a extending parallel to the sliding surface 41 , and a tapered surface 42 b continuing from the flat surface 42 a and extending in a direction intersecting the sliding surface 41 .

[0035] A plurality of through holes extending from the sliding surface 41 to the joint surface 42 are formed in the valve seat component 40. For example, in the present embodiment, the through hole is composed of two first through holes 43 arranged at intervals in the direction of the axis L and a second through hole 44 formed between the two first through holes 43. That is, a first through hole 43 constituting at least one of the plurality of through holes and a second through hole 44 different from the first through hole 43 are provided in the valve seat component 40. The first through hole 43 includes: a first port hole 43a (port hole) which opens on the sliding surface 41 (that is, opens into the valve chamber 32); a first joint hole 43b (joint hole) which opens on the joint surface 42 with an inner diameter larger than that of the first port hole 43a (that is, opens to the outside of the valve chamber 32); and a first connecting hole 43c (connecting hole) which connects the first port hole 43a with the first joint hole 43b. As Figure 3 As shown, the first port hole 43a is formed to extend in the orthogonal direction X. The first port hole 43a is formed in a continuous portion with the first communication hole 43c so as to be located entirely within the circumference of the first communication hole 43c.

[0036] In addition, as long as the entire circumference of the first port hole 43a is located within the circumference of the first connecting hole 43c in the continuous portion between the first port hole 43a and the first connecting hole 43c, the position of the first port hole 43a can be appropriately selected. Specifically, as shown in FIG6(A), the first port hole 43a can also be formed so that, in the continuous portion with the first connecting hole 43c, its central axis a is arranged at a position continuous with the central axis c of the first connecting hole 43c and the entire circumference is located within the circumference of the first connecting hole 43c. In addition, as shown in FIG6(B), the first port hole 43a can also be formed eccentrically to a position where its central axis a is not continuous with the central axis c of the first connecting hole 43c within the range of the entire circumference of the first connecting hole 43c in the continuous portion with the first connecting hole 43c.

[0037] In the case of the first through hole 43 shown in FIG. 6(B), when the central axis a is eccentric from the central axis c so as to be close to the adjacent port hole (in this embodiment, the second port hole 44a described later), the first port hole 43a can be close to the other port holes, and the area of ​​the sliding surface 41 can be easily ensured, which can contribute to the miniaturization of the valve seat member 40. On the other hand, as shown in FIG. 6(C), when the entire circumference of the port hole 80a is not located within the circumference of the communicating hole 80c, as in the continuous portion of the port hole 80a and the communicating hole 80c formed in the conventional member other than the valve seat member 40 of the present invention, as in the conventional sliding switching valve, a part of the circumference of the port hole 80a and a part of the circumference of the communicating hole 80c overlap each other when viewed from the orthogonal direction X, so cutting burrs are easily generated when the through hole is formed, and the subject of the present invention cannot be solved.

[0038] As shown in FIG4(B), the first connecting hole 43c is continuous with the end of the first port hole 43a in the orthogonal direction X and is inclined relative to the orthogonal direction X. The first connecting hole 43c is formed so that its inner diameter is larger than the inner diameter of the first port hole 43a and smaller than the inner diameter of the first joint hole 43b. The first connecting hole 43c is formed in such a way that the entire circumference of the continuous portion with the first joint hole 43b is located within the circumference of the first joint hole 43b. The first joint hole 43b is formed parallel to and coaxially with the first connecting hole 43c and opens at the tapered surface 42b in the joint surface 42. Figure 3 In the first joint hole 43b on the left side, a first working capillary 45 communicating with the first working chamber 17 of the four-way valve 1 is fixed in an inserted state by brazing or the like. Figure 3 In the figure, a second working capillary 46 communicating with the second working chamber 18 of the four-way valve 1 is fixed in an inserted state to the first joint hole 43b on the right side by brazing or the like.

[0039] In addition, in the present embodiment, as described above, the inner diameter of the first communication hole 43c is formed to be larger than the inner diameter of the first port hole 43a and smaller than the inner diameter of the first joint hole 43b, and the first communication hole 43c is formed to be located within the circumference of the first joint hole 43b at the continuous portion with the first joint hole 43b. However, the present invention is not limited to this structure, and the first communication hole 43c and the first joint hole 43b may be formed coaxially and integrally with each other with the same inner diameter, so that, for example, a part of the first joint hole 43b functions as the first communication hole 43c, and the first joint hole 43b is continuous with the first port hole 43a. Therefore, the inner diameter of the first communication hole 43c does not need to be smaller than the inner diameter of the first joint hole 43b, and may be formed to be the same size as the inner diameter of the first joint hole 43b. Therefore, the inner diameter of the first joint hole 43b may be set to a size larger than the inner diameter of the first communication hole 43c.

[0040] The second through hole 44 includes: a second port hole 44a (port hole) which opens on the sliding surface 41 (i.e., opens into the valve chamber 32); a second joint hole 44b (joint hole) which opens on the joint surface 42 with an inner diameter larger than that of the second port hole 44a (i.e., opens out of the valve chamber 32); and a second connecting hole 44c (connecting hole) which connects the second port hole 44a with the second joint hole 44b. As shown in FIG. 4(B), the second port hole 44a is formed to extend in the orthogonal direction X. The second port hole 44a is formed in a continuous portion with the second connecting hole 44c so that the entire circumference is located within the circumference of the second connecting hole 44c. The second connecting hole 44c is continuous with the end of the second port hole 44a in the orthogonal direction X and extends in the orthogonal direction X. That is, the second connecting hole 44c is formed to be non-inclined with respect to the orthogonal direction X, unlike the first connecting hole 43c. The second communication hole 44c is formed to have an inner diameter larger than that of the second port hole 44a and smaller than that of the second joint hole 44b. The second communication hole 44c is formed so that the entire circumference of the second joint hole 44b is located within the circumference of the second joint hole 44b in a continuous portion with the second joint hole 44b.

[0041] The second joint hole 44b is formed parallel to and coaxially with the second communication hole 44c, and opens at the flat surface 42a in the joint surface 42. Figure 3 As shown, in the second joint hole 44b, an S capillary 47 communicating with the S joint pipe 14 of the four-way valve 1 is fixed in an inserted state by brazing or the like. In addition, in the present embodiment, as described above, the inner diameter of the second communication hole 44c is formed to be larger than the inner diameter of the second port hole 44a and smaller than the inner diameter of the second joint hole 44b, and the second communication hole 44c is formed to be located within the circumference of the second joint hole 44b at the continuous portion with the second joint hole 44b. However, the present invention is not limited to this structure, and the second communication hole 44c and the second joint hole 44b may be coaxially formed as one body with the same inner diameter, so that, for example, a part of the second joint hole 44b functions as the second communication hole 44c, and the second joint hole 44b is continuous with the second port hole 44a. Therefore, the inner diameter of the second communication hole 44c does not need to be smaller than the inner diameter of the second joint hole 44b, and may be formed to be the same size as the inner diameter of the second joint hole 44b. Therefore, the inner diameter of the second joint hole 44b may be set to a size greater than the inner diameter of the second communication hole 44c.

[0042] In the first through hole 43 and the second through hole 44 thus formed, as shown in FIG4(A), the center of the first port hole 43a and the center of the second port hole 44a are arranged in a straight line in the direction of the axis L. That is, the first port hole 43a and the second port hole 44a (the port holes among the plurality of through holes) are arranged in the direction of the axis L. In addition, as shown in FIG4(B), the first connecting hole 43c and the second connecting hole 44c are arranged in the direction of the axis L. In addition, as shown in FIG4(C), the first joint hole 43b and the second joint hole 44b (the joint holes among the plurality of through holes) are arranged in the direction of the axis L. In this way, the first through hole 43 and the second through hole 44 are arranged in the direction of the axis L.

[0043] In addition, if Figure 5 As shown, the length A of the first port hole 43a in the through direction (orthogonal direction X) is shorter than the length B of the second port hole 44a in the through direction (orthogonal direction X). In addition, the length C of the first joint hole 43b in the through direction (inclined direction of the first connecting hole 43c) is longer than the length D of the second joint hole 44b in the through direction (orthogonal direction X). In addition, the distance in the direction of the axis L from the center of the first port hole 43a to the center of the second port hole 44a, that is, the center-to-center distance E, is smaller than the inner diameter F of the joint hole (in this embodiment, the inner diameter F of the second joint hole 44b). That is, the distance in the direction of the axis L from the center of one of the port holes (the first port hole 43a and the second port hole 44a) respectively connected to the adjacent joint holes (the first joint hole 43b and the second joint hole 44b) to the center of the other, that is, the center-to-center distance E, is smaller than the inner diameter F of the adjacent joint holes.

[0044] like Figure 2 As shown, the valve core 50 extends in the orthogonal direction X to form a columnar shape and is provided to be slidable in the direction of the axis L. A recessed portion 51 opening toward the sliding surface 41 is formed on the surface of the valve core 50 that faces the sliding surface 41. Figure 3 As shown in FIG. 1 , the opening of the recess 51 is formed to cover the openings of two adjacent port holes (the first port hole 43a and the second port hole 44a). The recess 51 is configured so that the opening edge thereof slides on the sliding surface 41, and the communication state of the port holes (the first port hole 43a and the second port hole 44a) is switched by sliding along the axis L. Thus, the communication state of the D capillary 35, the first working capillary 45, the second working capillary 46, and the S capillary 47 is switched.

[0045] Specifically, the recess 51 is Figure 2The left end position shown makes the first working capillary 45 communicate with the S capillary 47, and makes the D capillary 35 communicate with the second working capillary 46. In this state, the high-pressure driving fluid that flows into the valve chamber 32 through the D capillary 35 flows to the valve seat component 40 side through the second pressure equalizing hole 66 described later, and flows into the second working chamber 18 of the four-way valve 1 through the second working capillary 46 from the first port hole 43a that is not covered by the recess 51. On the other hand, the low-pressure driving fluid that flows into the recess 51 through the S capillary 47 flows from the first port hole 43a through the first working capillary 45 into the first working chamber 17 of the four-way valve 1. As a result, a pressure difference is generated between the first working chamber 17 and the second working chamber 18, and the sliding valve core 20 of the four-way valve 1 moves to Figure 1 The left end position shown is moved.

[0046] On the other hand, when the valve core 50 moves from the left end position to the right side and is located at the right end position not shown in the figure, the recess 51 connects the second working capillary 46 with the S capillary 47, and connects the D capillary 35 with the first working capillary 45. In this state, the high-pressure driving fluid that flows into the valve chamber 32 through the D capillary 35 flows toward the valve seat component 40 side through the second pressure equalizing hole 66, and flows into the first working chamber 17 of the four-way valve 1 through the first working capillary 45 from the first port hole 43a that is not covered by the recess 51. On the other hand, the low-pressure driving fluid that flows into the recess 51 through the S capillary 47 flows from the first port hole 43a through the second working capillary 46 into the second working chamber 18 of the four-way valve 1. As a result, a pressure difference is generated between the first working chamber 17 and the second working chamber 18, and the sliding valve core 20 of the four-way valve 1 moves from Figure 1 The left end position shown is shifted to the right.

[0047] like Figure 2 As shown, the electromagnetic drive unit 60 includes a plunger 61 arranged in the plunger arrangement chamber 33, an attracting member 62 arranged at a distance from the plunger 61 in the direction of the axis L, an electromagnetic coil 63, and a housing 64. The plunger 61 includes a large diameter portion 61a that slides in the direction of the axis L relative to the inner peripheral surface of the valve body 31, and a small diameter portion 61b that is continuous with the large diameter portion 61a and extends toward the valve chamber 32. A first equalizing pressure hole 65 that passes through the direction of the axis L is formed in the large diameter portion 61a. A second equalizing pressure hole 66 that intersects with the first equalizing pressure hole 65 and passes through in the orthogonal direction X is formed in the small diameter portion 61b. According to this structure, the first equalizing pressure hole 65 is connected to the second equalizing pressure hole 66. In addition, through this structure, the driving fluid that flows into the valve chamber 32 from the above-mentioned D capillary 35 as a high-pressure pipe flows toward the valve seat component 40 through the second equalizing pressure hole 66, and flows toward the first port hole 43a or the second port hole 44a opened in the valve chamber 32.

[0048] In addition, the driving fluid flowing into the valve chamber 32 flows from the second equalizing pressure hole 66 to the plunger configuration chamber 33 through the first equalizing pressure hole 65. As a result, the valve chamber 32 and the plunger configuration chamber 33 are connected via the first equalizing pressure hole 65 and the second equalizing pressure hole 66, and the same pressure is applied to the valve chamber 32 and the plunger configuration chamber 33. A concave retaining portion 67 opening toward the valve seat member 40 is formed in the small diameter portion 61b of the plunger 61. The valve core 50 is accommodated in the retaining portion 67. The valve core 50 is pressed against the sliding surface 41 of the valve seat member 40 by a force applying member 67a provided inside the retaining portion 67. The suction member 62 is arranged at a distance from the plunger 61 in the direction of the axis L, and is fixed in the valve body 31. It is configured so that a plunger spring 68 is sandwiched between the suction member 62 and the plunger 61, thereby the plunger 61 is urged toward the valve core 50 side.

[0049] The electromagnetic coil 63 is arranged on the outer periphery of the valve body 31, and surrounds the plunger 61 and the suction member 62 in the circumferential direction around the axis L. The electromagnetic coil 63 is configured to include a bobbin 69 and a winding 69a wound around the bobbin 69. With such a structure, the electromagnetic drive unit 60 uses the force of the plunger spring 68 to push the plunger 61 to the valve body 31 when the power is not supplied. Figure 2 The left side of the piston 61 and the valve core 50 are forced to move Figure 2 On the other hand, when the power is turned on, the attracting member 62 is excited, thereby generating an attractive force between the plunger 61 and the attracting member 62, and the plunger 61 and the valve core 50 move to the right side.

[0050] According to the above structure, the high-pressure refrigerant compressed by the compressor 6 flows from the D joint pipe 12 into the high-pressure chamber 16. In the state of cooling operation (cooling mode), the high-pressure refrigerant flows from the C joint pipe 15 into the outdoor heat exchanger 5. In addition, in the state of heating operation (heating mode) with the position of the sliding valve core 20 switched, the high-pressure refrigerant flows from the E joint pipe 13 into the indoor heat exchanger 3. That is, in the cooling operation, the refrigerant discharged from the compressor 6 circulates through the C joint pipe 15, the outdoor heat exchanger 5, the throttling device 4, the indoor heat exchanger 3, and the E joint pipe 13, and the outdoor heat exchanger 5 functions as a condenser (condenser) and the indoor heat exchanger 3 functions as an evaporator (evaporation device) to perform cooling. The throttling device 4 expands the refrigerant between the outdoor heat exchanger 5 and the indoor heat exchanger 3 to reduce the pressure. In addition, in the heating operation, the refrigerant circulates in the opposite direction, and the indoor heat exchanger 3 functions as a condenser and the outdoor heat exchanger 5 functions as an evaporator to perform heating.

[0051] As described above, according to the above-mentioned embodiment, the first port hole 43a and the first joint hole 43b are connected via the first communication hole 43c which is provided obliquely with respect to the orthogonal direction X (orthogonal direction of the surface) of the sliding surface 41. The inner diameter of the first port hole 43a is smaller than the inner diameter of the first communication hole 43c, and the entire circumference of the first port hole 43a is located within the circumference of the first communication hole 43c at the continuous portion of the first port hole 43a and the first communication hole 43c. In addition, the inner diameter of the first joint hole 43b is set to a size greater than the inner diameter of the first communication hole 43c. Therefore, the first through hole 43 can be formed without causing the first port hole 43a, the first communication hole 43c, and the first joint hole 43b to interfere with each other. Therefore, the overlapping portion of the port and the joint hole will not be generated as in the above-mentioned conventional sliding switching valve, and the generation of cutting burrs when forming the through hole can be suppressed. Therefore, it is possible to obtain a pilot valve 2 (slide type switching valve) which can suppress the generation of cutting burrs during the processing of the valve seat member 40 and can prevent the occurrence of malfunctions in the refrigeration cycle due to foreign matter.

[0052] In addition, since the valve seat member 40 can be provided with communicating holes extending in different directions, such as the first communicating hole 43c inclined with respect to the orthogonal direction X and the second communicating hole 44c extending in the orthogonal direction X, it is possible to prevent the plurality of communicating holes (the first communicating hole 43c, the second communicating hole 44c) and the plurality of joint holes (the first joint hole 43b, the second joint hole 44b) from interfering with each other. In addition, by forming the length A of the first port hole 43a in the through direction shorter than the length B of the second port hole 44a in the through direction, the continuous portion of the first port hole 43a and the first communicating hole 43c and the continuous portion of the second port hole 44a and the second communicating hole 44c can be offset in the orthogonal direction X. That is, the portion where the inner diameter increases from the first port hole 43a to the first communicating hole 43c and the portion where the inner diameter increases from the second port hole 44a to the second communicating hole 44c can be offset in the orthogonal direction X. Therefore, even when the first port hole 43 a and the second port hole 44 a are brought close to each other, it is possible to prevent the first communication hole 43 c and the second communication hole 44 c from interfering with each other.

[0053] In addition, in the present embodiment, the inner diameter of the first communication hole 43c is smaller than the inner diameter of the first joint hole 43b, and the first communication hole 43c is located within the circumference of the first joint hole 43b at the continuous portion with the first joint hole 43b. According to such a structure, the port hole (for example, the second port hole 44a) and the communication hole (for example, the second communication hole 44c) of the through hole (for example, the second through hole 44) adjacent to the first through hole 43 can be made close to the first through hole 43 by the difference between the inner diameter of the first communication hole 43c and the inner diameter of the first joint hole 43b. Therefore, compared with the structure in which the inner diameter of the first communication hole 43c is the same as the inner diameter of the first joint hole 43b, the portion of the valve seat member 40 for forming the through hole (the first through hole 43, the second through hole 44) can be smaller, which can contribute to the miniaturization of the valve seat member 40.

[0054] In addition, the inner diameter of the second communication hole 44c is smaller than the inner diameter of the second joint hole 44b, and the second communication hole 44c is located within the circumference of the second joint hole 44b at the continuous portion with the second joint hole 44b. According to such a structure, the port hole (for example, the first port hole 43a) of the through hole (for example, the first through hole 43) adjacent to the second through hole 44, the communication hole (for example, the first communication hole 43c), and the second through hole 44 can be made close to the difference between the inner diameter of the second communication hole 44c and the inner diameter of the second joint hole 44b. Therefore, compared with the structure in which the inner diameter of the second communication hole 44c is the same as the inner diameter of the second joint hole 44b, the portion of the valve seat member 40 for forming the through hole (the first through hole 43, the second through hole 44) can be smaller, which can contribute to the miniaturization of the valve seat member 40.

[0055] Furthermore, by forming the length C of the first joint hole 43b in the through direction longer than the length D of the second joint hole 44b in the through direction, the continuous portion of the first joint hole 43b and the first communicating hole 43c and the continuous portion of the second joint hole 44b and the second communicating hole 44c can be offset in the orthogonal direction X. That is, the portion where the inner diameter increases from the first communicating hole 43c to the first joint hole 43b and the portion where the inner diameter increases from the second communicating hole 44c to the second joint hole 44b can be offset in the orthogonal direction X. Therefore, even when the first port hole 43a and the second port hole 44a are brought close to each other, the first joint hole 43b and the second joint hole 44b can be prevented from interfering with each other.

[0056] In addition, as described above, the structure in which the length A of the through-direction of the first port hole 43a is formed to be shorter than the length B of the through-direction of the second port hole 44a and the structure in which the length C of the through-direction of the first joint hole 43b is formed to be longer than the length D of the through-direction of the second joint hole 44b may be formed independently. However, by forming the length A of the through-direction of the first port hole 43a to be shorter than the length B of the through-direction of the second port hole 44a and further forming the length C of the through-direction of the first joint hole 43b to be longer than the length D of the through-direction of the second joint hole 44b, the first connecting hole 43c and the second connecting hole 44c can be prevented from interfering with each other, and the first joint hole 43b and the second joint hole 44b can be prevented from interfering with each other, so it is preferable to set the lengths A, B, C, and D as in the present embodiment.

[0057] In addition, the first joint hole 43b and the second joint hole 44b (joint holes among the multiple through holes) are respectively arranged along the axis L direction and open on the joint surface 42. Therefore, compared with the structure in which the first joint hole 43b and the second joint hole 44b, for example, do not overlap with each other when viewed from the axis L direction and extend to one side and the other side of the width direction of the valve seat part orthogonal to the axis L direction, the width direction dimension of the valve seat part 40 can be reduced, which helps to miniaturize the valve seat part 40.

[0058] In addition, the first joint hole 43b and the first connecting hole 43c are arranged parallel and coaxially, and a tapered surface 42b extending in a direction intersecting the sliding surface 41 and opening the first joint hole 43b is provided on the joint surface 42. Therefore, when processing the first connecting hole 43c inclined in the orthogonal direction X relative to the sliding surface 41, the tapered surface 42b is first cut using a processing tool to form the first joint hole 43b, and the first connecting hole 43c can be formed by directly cutting at the same angle. Therefore, the first joint hole 43b and the first connecting hole 43c can be easily formed. In addition, the tapered surface 42b extends in a direction intersecting the sliding surface 41, so for example, the tapered surface 42b can also be formed to extend in a direction orthogonal to the penetration direction of the first connecting hole 43c. In this case, the processing tool can be made to abut orthogonally with the tapered surface 42b. Therefore, it is possible to prevent the tool from sliding relative to the tapered surface 42b, and the first joint hole 43b and the first connecting hole 43c can be easily and accurately formed.

[0059] In addition, in the present embodiment, the valve seat member 40 is made of stainless steel. Compared with brass and other materials used as the material of the valve seat member of the conventional sliding switching valve, the stainless steel material is more likely to generate cutting burrs during processing, but as described above, according to the present structure, the generation of cutting burrs when forming the first through hole 43 (through hole) and the second through hole 44 (through hole) can be suppressed. Therefore, the present invention can also be applied to the valve seat member 40 using a material that is prone to generating cutting burrs.

[0060] In addition, according to the present embodiment, the distance in the direction of the axis L from the center of one of the first port hole 43a (port hole) and the second port hole 44a (port hole) respectively communicating with the adjacent first joint hole 43b (joint hole) and the second joint hole 44b (joint hole), i.e., the center-to-center distance E, is smaller than the inner diameter F of the second joint hole 44b (adjacent joint hole). According to such a configuration, in the direction of the axis L, i.e., the sliding direction of the valve body 50, the more the center-to-center distance E of the first port hole 43a and the second port hole 44a converges to a range smaller than the inner diameter F of the second joint hole 44b, the smaller it is, and thus the sliding distance of the valve body 50 can be reduced. Therefore, for example, when the electromagnetic drive unit 60 is constituted by a device including a plunger 61 and a suction member 62, the distance between the plunger 61 and the suction member 62 can be shortened, which can contribute to the miniaturization of the electromagnetic drive unit 60 and labor saving accompanying the miniaturization.

[0061] In addition, by reducing the center-to-center distance E as described above, it is easy to ensure the area of ​​the portion of the sliding surface 41 that slides with the opening end edge of the valve core 50 and seals the recessed portion 51. Therefore, compared with a structure in which the center-to-center distance E is not less than the inner diameter of the adjacent joint hole, the outer diameter of the sliding surface 41 can be reduced, thereby making it possible to miniaturize the valve seat component 40 itself. This miniaturization is particularly suitable for the case where the valve body 31 is formed into a bottomed cylindrical shape as in the present embodiment. Specifically, in the case where the valve body 31 is formed into a bottomed cylindrical shape, in order to embed the valve seat component 40, it is necessary to form a hole such as the above-mentioned second mounting hole 36 in the valve body 31, but the valve body 31 is cylindrical, so the larger the second mounting hole 36 is, the more difficult it is to process. However, according to this structure, by miniaturizing the valve seat component 40 itself, there is no need to enlarge the second mounting hole 36, so that the manufacture of the pilot valve 2 can be facilitated.

[0062] Furthermore, in this way, the generation of cutting burrs during the processing of the valve seat member 40 can be suppressed, and the refrigeration cycle system 100 can be configured using a slide-type switching valve that is less likely to cause malfunctions in the refrigeration cycle due to foreign matter.

[0063] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the specific structure is not limited to these embodiments, and changes in design within the scope of the main purpose of the present invention are also included in the present invention. FIG7 (A) is a top view of a valve seat component 70 of a modified example, FIG7 (B) is a cross-sectional view of the valve seat component 70 of the modified example, and FIG7 (C) is a rear view of the valve seat component 70 of the modified example. Figure 8 It is an enlarged cross-sectional view showing the dimensional relationship of the valve seat member 70 according to the modified example.

[0064] The valve seat member 70 is formed into a cylindrical shape extending in the orthogonal direction X using a stainless steel material. As shown in FIG. 7(B), the end surface of the valve seat member 70 on the inner side in the orthogonal direction X constitutes a sliding surface 71 for the valve core 50 to slide, similarly to the above-mentioned sliding surface 41. On the other hand, a joint surface 72 is formed on the outer side of the valve seat member 70 in the orthogonal direction X. Unlike the above-mentioned joint surface 42, the joint surface 72 does not have a tapered surface 42b, but is constituted by a flat surface. Three (plural) first through holes 73 are formed in the valve seat member 70, which pass from the sliding surface 71 to the joint surface 72. The first through hole 73 includes a first port hole 73a (port hole) opened on the sliding surface 71, a first joint hole 73b (joint hole) opened on the joint surface 72 with an inner diameter larger than the first port hole 73a, and a first connecting hole 73c (connecting hole) that connects the first port hole 73a with the first joint hole 73b.

[0065] The difference from the above-mentioned embodiment is that the first port hole 73a, the first joint hole 73b and the first connecting hole 73c are equivalent to the first port hole 43a, the first joint hole 43b and the first connecting hole 43c, but in the modified example, as shown in FIG7(B), the first joint hole 73b does not extend parallel to the first connecting hole 73c, but extends along the orthogonal direction X and opens on the joint surface 72. In addition, through this structure, in order to avoid interference between an adjacent first joint hole 73b and another first joint hole 73b, as shown in FIG7(C), when the joint surface 72 is observed from the orthogonal direction X, the center of one first joint hole 73b and the center of another first joint hole 73b are arranged in a staggered manner on one side and the other side of the width direction orthogonal to the axis L. In addition, in the modified example, as shown in FIG7(B), the imaginary periphery 73d formed by imaginarily extending the inclined first connecting hole 73c to the joint surface 72 is located within the circumference of the opening of the first joint hole 73b. Thus, as shown in FIG7(C), Figure 8 As shown, within the range of the dimension G of the first joint hole 73b in the orthogonal direction X (the depth dimension of the first joint hole 73b), the imaginary peripheral edge 73d does not abut against the inner peripheral surface of the first joint hole 73b.

[0066] According to such a structure, when processing the first connecting hole 73c inclined in the direction X perpendicular to the sliding surface 71, the first connecting hole 73b is first cut from the connecting surface 72 using a processing tool, and then the first connecting hole 73c is cut by changing the angle. However, since the imaginary periphery 73d formed by imaginary extension of the first connecting hole 73c to the connecting surface 72 is located within the circumference of the opening of the first connecting hole 73b, the first connecting hole 73c can be formed without the processing tool contacting the inner peripheral surface of the first connecting hole 73b. Therefore, a pilot valve 2 can be obtained, which can easily form the first connecting hole 73c, and can suppress the generation of cutting burrs when processing the valve seat member 70, and can prevent the occurrence of adverse conditions in the refrigeration cycle caused by foreign matter.

[0067] In addition, in the present embodiment, the valve body 31 of the pilot valve 2 is formed into a bottomed cylindrical shape, but the present invention can also be applied to a pilot valve 2 having a valve body without a bottom. However, in the case of such a structure, since a hole is opened at the bottom of the valve body 31, the valve seat member 40 can also be assembled through the hole at the bottom, and the second mounting hole 36 mentioned above may not be necessary, and the problem of difficulty in enlarging the second mounting hole 36 as mentioned above may not occur. Therefore, when the valve body 31 is formed into a bottomed cylindrical shape, the present invention is more effective.

[0068] In addition, in the present embodiment and the modified example, as an example of a sliding switching valve, a pilot valve 2 is illustrated in which a driving fluid that moves a sliding valve core 20 of a four-way valve 1 for switching the connection state of four pipes flows between the four-way valve 1, and the valve seat component 40 of the pilot valve 2 is mainly described. However, for example, in the four-way valve 1, the utility model can also be applied to the valve seat component that configures the E joint pipe 13, the S joint pipe 14, and the C joint pipe 15. In addition, the sliding switching valve is not limited to these four-way valves 1 and pilot valves 2. As long as the sliding switching valve has at least one pair of pipes connected to the valve housing, it can also be a three-way valve for connecting pipes when a pair of pipes among three pipes is connected by using a valve core. Alternatively, the number of pipes to be connected can be further increased to form a multi-way valve. In this way, the number of pipes in the sliding switching valve, the method of switching the connection state, etc. can be changed according to the application object of the sliding switching valve.

[0069] In addition, in the above-mentioned embodiment, a second through hole 44 is arranged between two first through holes 43, but in the embodiment, the first through holes 43 can also be adjacent as in the modified example. In addition, at this time, the first joint hole 43b of the first through hole 43 can also extend in the orthogonal direction X as in the modified example. Moreover, in this case, as in the above-mentioned structure, the center-to-center distance E of adjacent port holes can be made smaller than the inner diameter of the joint hole. That is, the center-to-center distance E of adjacent first port holes 43a can be smaller than the inner diameter of the first joint hole 43b. In this case, the size of the inner diameter of the first joint hole 43b is equal to the sum of the radii of each first joint hole 43b, and the more the center from one first port hole 43a to the center of another first port hole 43a converges within this range, the smaller the center-to-center distance E of adjacent first port holes 43a can be.

[0070] According to this structure, for example, when one first joint hole 43b and another first joint hole 43b are arranged without a gap in the direction of the axis L, the adjacent first port holes 43a can be arranged so that the center-to-center distance becomes smaller than the distance in the axial direction from the center of one first joint hole 43b to the center of the other first joint hole 43b, that is, the joint-side center-to-center distance. In addition, in this structure, the inner diameter of the first joint hole 43b is also larger than the inner diameter of the first port hole 43a, so the first port hole 43a and the first joint hole 43b are not coaxial. However, in the utility model, the first port hole 43a and the first joint hole 43b can be connected by the inclined first connecting hole 43c, so it is possible to prevent the overlap of the port and the joint hole from being generated as in the conventional sliding switching valve. Therefore, even in the state where the adjacent first port holes 43a and the adjacent first joint holes 43b are close to each other, the generation of cutting burrs during the processing of the valve seat member 40 can be suppressed.

Claims

1. A sliding switching valve, comprising: a hollow cylindrical valve body; a valve seat member provided on the valve body; a valve core provided inside the valve body to slide freely along an axial direction; and a driving unit for slidingly driving the valve core, It is characterized in that The valve seat member comprises: a sliding surface on which the valve element slides; a joint surface located on the side opposite to the sliding surface; and a plurality of through holes penetrating from the sliding surface to the joint surface. The through hole comprises: a port hole opened on the sliding surface; a joint hole opened on the joint surface with an inner diameter larger than that of the port hole and into which the joint component is inserted; and a connecting hole connecting the port hole and the joint hole, wherein the port holes in the plurality of through holes are arranged in an array in the axial direction, A first through hole constituting at least one of the plurality of through holes includes a first port hole as the port hole, a first communicating hole as the communicating hole, and a first joint hole as the joint hole. The first connecting hole is arranged to be inclined relative to the surface perpendicular to the sliding surface, and its inner diameter is larger than the inner diameter of the first port hole. The first port hole is located within the circumference of the first communicating hole at a continuous portion with the first communicating hole throughout the circumference. The inner diameter of the first joint hole is set to be larger than the inner diameter of the first communication hole.

2. The sliding switching valve according to claim 1, characterized in that: The port hole of a second through hole different from the first through hole among the plurality of through holes, namely the second port hole, is extended in the surface-orthogonal direction of the sliding surface and is formed to have an inner diameter smaller than the communicating hole of the second through hole, namely the second communicating hole, The second connecting hole is extended in the surface-orthogonal direction of the sliding surface. In the continuous portion between the second port hole and the second communicating hole, the entire circumference of the second port hole is located within the circumference of the second communicating hole. The length of the first port hole in the through-direction is formed to be shorter than the length of the second port hole in the through-direction.

3. The sliding switching valve according to claim 2, characterized in that: The inner diameter of the first connecting hole is smaller than the inner diameter of the first connecting hole. The first connecting hole is located within the circumference of the first connecting hole at a continuous portion with the first connecting hole. The inner diameter of the second connecting hole is smaller than the inner diameter of the second connecting hole of the second through hole, that is, the second connecting hole. The second connecting hole is located within the circumference of the second connecting hole at the continuous portion with the second connecting hole. The length of the first joint hole in the penetration direction is formed to be longer than the length of the second joint hole in the penetration direction.

4. The sliding switching valve according to claim 1, characterized in that: The joint holes among the plurality of through holes are arranged in the axial direction and open on the joint surface.

5. The sliding switching valve according to claim 1, characterized in that: The first joint hole is arranged parallel to and coaxially with the first communicating hole, and the joint surface is provided with a tapered surface extending in a direction intersecting the sliding surface and opening the first joint hole.

6. The sliding switching valve according to claim 1, characterized in that: The first through holes are provided in plurality, the first joint hole extends parallel to the first port hole and opens at the joint surface, An imaginary periphery formed by imaginarily extending the inclined first communicating hole to the joint surface is located within the circumference of the opening of the first joint hole.

7. The sliding switching valve according to claim 1, characterized in that: The valve seat component is made of stainless steel.

8. The slide-type switching valve according to any one of claims 1 to 7, characterized in that: The distance in the axial direction from the center of one of the port holes respectively communicating with the adjacent joint holes to the center of the other, that is, the center-to-center distance, is smaller than the inner diameter of the adjacent joint hole.

9. A refrigeration cycle system, characterized in that: have: The sliding switching valve according to claim 1.

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