CN117249270A

CN117249270A - Sliding type switching valve

Info

Publication number: CN117249270A
Application number: CN202310693077.0A
Authority: CN
Inventors: 横田纯一; 中野诚一; 笠井宣
Original assignee: Saginomiya Seisakusho Inc
Current assignee: Saginomiya Seisakusho Inc
Priority date: 2022-06-17
Filing date: 2023-06-12
Publication date: 2023-12-19

Abstract

The invention provides a sliding type switching valve which can restrain the processing cost for positioning a valve seat part and can improve the tightness of a valve core and the valve seat part by researching a fixing mechanism of the valve seat part. The valve comprises a valve body (2), a valve body (4) and a valve seat (3), wherein guide parts (2 cg, 2 bg) which are arranged upright from the fixed surface (2 bf) along the vertical direction and can be abutted against the valve seat (3) are respectively arranged on at least one side of the fixed surface (2 bf) of the valve body (2) in the direction of an axis (L) and a pair of sides of the direction orthogonal to the axis (L), after the valve seat (3) is positioned on the guide parts (2 cg, 2 bg), an adhesive surface (34) is adhered and fixed on the fixed surface (2 bf), and adhesive storage parts (61-66) are formed on at least one opposite surface of the guide part and the valve seat part in a mode that an adhesive (Ad) cannot seep from the adhesive surface (34) to a sliding contact surface (33). This can improve the sealability between the valve body and the valve seat.

Description

Sliding type switching valve

Technical Field

The present invention relates to a sliding type switching valve including a guide portion capable of abutting against a valve seat portion.

Background

In recent years, for the purpose of improving the performance Coefficient (COP) in a refrigeration cycle system, improvement of sealability of each device (sliding type switching valve) of the refrigeration cycle system has been desired.

Here, for example, patent document 1 (particularly, refer to page 6, line 20 to page 7, line 9, and fig. 5 a) describes as follows: in a sliding type switching valve (hereinafter referred to as a "conventional sliding type switching valve"), a protrusion protruding from a lower surface of a valve seat portion and a groove recessed from an upper surface of the valve seat portion are provided as positioning means for the valve seat portion and the valve seat receiving portion, and the valve seat portion and the valve seat receiving portion are positioned by fitting the protrusion into the groove.

Prior art literature

Patent literature

Patent document 1: chinese patent application publication No. 101614288

Disclosure of Invention

Problems to be solved by the invention

However, in patent document 1, since the protruding portion is provided in the valve seat portion, the valve seat portion is complicated to process, and warpage and deformation occur on the upper surface of the plate-shaped valve seat portion due to the processing of the protruding portion, and there is a concern that the sealing performance with the valve body is impaired (hereinafter, referred to as "the first problem point of the prior art (problem caused by the positioning mechanism of the valve seat portion)").

In patent document 1 (see, in particular, page 7, line 20 to page 8, line 8), weld-fixing is employed as a fixing means for the valve seat portion and the valve seat receiving portion after positioning, but the surface of the valve seat portion is deformed by the heat influence caused by the weld-fixing, and thus it is necessary to perform a surface finishing (hereinafter, referred to as "second problem point of the prior art (problem caused by the fixing means of the valve seat portion)") on the surface of the deformed valve seat portion.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sliding type switching valve capable of improving sealability between a valve body and a valve seat portion while suppressing the processing cost for positioning the valve seat portion by studying a fixing mechanism of the valve seat portion.

Means for solving the problems

In order to solve the above problems, a sliding type switching valve is provided with: a hollow cylindrical valve body extending in an axial direction; a valve body slidably provided in the valve body in an axial direction; and a plate-shaped valve seat portion fixed to a fixed surface of the valve body, wherein the valve body is in sliding contact with the valve body, the valve seat portion has a plurality of valve ports arranged in an axial direction, a sliding contact surface in sliding contact with the valve body, and an adhesive surface located on an opposite side of the sliding contact surface, guide portions provided upright from the fixed surface in a vertical direction and capable of abutting the valve seat portion are provided on at least one of one end side in the axial direction and a pair of sides in a direction orthogonal to the axial direction of the fixed surface of the valve body, the valve seat portion is positioned on the guide portion, the adhesive surface is adhered and fixed to the fixed surface, and an adhesive reservoir is formed on at least one of the opposing surfaces of the guide portion and the valve seat portion so that an adhesive does not ooze out from the adhesive surface toward the sliding contact surface.

In the sliding type switching valve, it is preferable that the total volume of the adhesive reservoir is equal to or greater than an application amount of the adhesive used for fixing the valve seat to the fixing surface.

In the sliding type switching valve, it is preferable that the adhesive reservoir formed on the facing surface of at least one of the guide portion and the valve seat portion has a width larger than a maximum mounting gap between the guide portion and the valve seat portion in a direction orthogonal to the axis, and the adhesive having a concave surface and being cured is disposed inside the adhesive reservoir.

In the sliding type switching valve, it is preferable that the adhesive reservoir formed on the opposed adhesion surface of at least one of the guide portion and the valve seat portion has a width larger than a mounting gap between the guide portion and the valve seat portion in the axial direction, and the adhesive having a concave surface and being cured is disposed inside the adhesive reservoir.

In the sliding type switching valve, it is preferable that the guide portion is provided on one end side in the axial direction and on both sides of a pair of sides in a direction orthogonal to the axial direction, and an arc angle extending in the axial direction is provided at a corner portion of the adhesive reservoir connecting the fixing surface and the guide portion provided on both sides of the pair of sides.

In the sliding type switching valve, it is preferable that the radius of curvature of the circular arc angle at the position of the adhesive reservoir having the largest separation radius farthest from the axial center of the valve main body is 0.5 times or more and equal to or less than the largest separation radius of the valve seat portion.

In the sliding type switching valve, it is preferable that the radius of curvature of the arc angle is the maximum separation radius at a position having the maximum separation radius farthest from the axis.

In the sliding type switching valve, it is preferable that the circular arc angle has a region recessed at least with respect to the fixed surface.

In order to solve the above problems, a sliding type switching valve is provided with: a hollow cylindrical valve body extending in an axial direction; a valve body slidably provided in the valve body in an axial direction; and a plate-shaped valve seat portion fixed to a fixed surface of the valve body, wherein the valve body is in sliding contact with the valve body, the valve seat portion has a plurality of valve ports arranged in an axial direction, a sliding contact surface in sliding contact with the valve body, and an adhesive surface located on an opposite side of the sliding contact surface, at least one of one end side in the axial direction and a pair of sides in a direction orthogonal to the axial direction of the fixed surface of the valve body is provided with guide portions standing from the fixed surface in a vertical direction and capable of abutting the valve seat portion, the valve seat portion is positioned at the guide portions, the adhesive surface is adhered and fixed to the fixed surface, and an adhesive escape space is formed on an outer peripheral surface of the valve body facing the guide portion so that an adhesive oozing from the adhesive surface onto the sliding contact surface does not interfere with the valve body.

In the sliding type switching valve, it is preferable that the valve is provided with a valve body having a valve body opening and closing means,

the adhesive escape space formed in the outer peripheral surface of the valve body facing the guide portion is formed by a sliding contact portion that protrudes from the valve body and is in sliding contact with the guide portion, the sliding contact portion being larger than the adhesive oozing width on the sliding contact surface.

In the sliding type switching valve, it is preferable that the adhesive escape space formed in the outer peripheral surface of the valve body facing the guide portion in the axial direction is formed by a protrusion portion that protrudes from the valve body and abuts against the guide portion, the protrusion portion being larger than an adhesive exudation width on the sliding contact surface.

The effects of the invention are as follows.

According to the present invention, it is possible to provide a sliding type switching valve in which the fixing mechanism of the valve seat portion is studied, the processing cost for positioning the valve seat portion is suppressed, and the sealability between the valve body and the valve seat portion is improved.

Drawings

Fig. 1 is a sectional view of a sliding type switching valve according to a first embodiment of the present invention.

Fig. 2 is a diagram showing the refrigeration cycle system of the present invention.

Fig. 3 is a sectional view of the valve body shown in fig. 1, (a) shows an overall view of the valve body, (b) shows a sectional view taken along a IIIb-IIIb line shown in (a), and (c) shows a sectional view taken along a IIIc-IIIc line shown in (a).

Fig. 4 is a diagram illustrating a process of attaching the valve seat portion to the valve body shown in fig. 1, (a) shows an overall view of the valve seat portion shown in fig. 1, (b) shows an outward view seen from the direction of an arrow IVb shown in (a), (c) shows an overall view of attaching the valve seat portion shown in (a) to the valve body shown in fig. 3 (a), and (d) shows a cross-sectional view taken along the line IVd-IVd shown in (c).

Fig. 5 is a diagram illustrating a sliding contact state in which the valve body and the valve seat portion are in sliding contact with each other in the first embodiment, (a) shows an overall diagram, (b) shows a cross-sectional view along a line Vb-Vb shown in (a), (c) shows an enlarged view of a region surrounded by a broken line Vc shown in (a) in the comparative example, and (d) shows an enlarged view of a region surrounded by a broken line Vd shown in (b) in the comparative example.

Fig. 6 is an enlarged view corresponding to fig. 5 (c) in the first embodiment, (a) shows the first embodiment in form 1-1, (b) shows the first embodiment in form 1-2, and (c) shows the first embodiment in form 1-3.

Fig. 7 is an enlarged view corresponding to fig. 5 (d) in the first embodiment, (a) shows the form 2-1 of the first embodiment, (b) shows the form 2-2 of the first embodiment, and (c) shows the form 2-3 of the first embodiment.

Fig. 8 is an enlarged view corresponding to fig. 5 (b) in the first embodiment, (a) shows form 3-1 of the first embodiment, (b) shows an enlarged view of a region surrounded by a broken line VIIIb shown in (a), and (c) shows form 3-2 of the first embodiment corresponding to (b).

Fig. 9 is an enlarged view corresponding to fig. 8 (a) in the first embodiment, (a) shows form 4-1 of the first embodiment, (b) shows an enlarged view of a region surrounded by a broken line IXb shown in (a), and (c) shows form 4-2 of the first embodiment corresponding to (b).

Fig. 10 is a diagram illustrating a sliding contact state in which the valve body and the valve seat portion are in sliding contact with each other in the second embodiment, (a) shows an overall diagram, (b) shows a cross-sectional view along the Xb-Xb line shown in (a), (c) shows an enlarged view of a region surrounded by a broken line Xc shown in (a) in the second embodiment, and (d) shows an enlarged view of a region surrounded by a broken line Xd shown in (b) in the second embodiment.

Fig. 11 is a perspective view of the valve body in the second embodiment, (a) shows an upper perspective view, and (b) shows a lower perspective view.

In the figure:

100-sliding type switching valve, 1-housing, 1 a-insertion port, 1C-second path, 1D-inlet path, 1E-first path, 1S-outlet path, 1C-C connector tube, 1D-D connector tube, 1E-E connector tube, 1S-S connector tube, 2', 2", 2'", 2"", 2A, 2B-valve body, 2A-valve chamber (inside of valve body), 2B-inner peripheral wall, 2 bf-fixed surface, 2 bg-side guide (guide), 2 br-recess, 2C-one end side wall, 2 cg-one end side guide (guide), 2 cr-recess, 2D-other end side opening, 20-inlet port, 21-first connecting passage, 22-outlet connecting passage, 23-second connecting passage, 24-lower cover, 25-upper cover, 25 a-small diameter portion, 25B-large diameter portion, 26-O-ring, 27-retainer ring, 3, 3', 3", 3'", 3A, 3B, 3C, 3D-valve seat portion, 3A '"-plate portion, 3B'" -pair of reinforcing portions, 3C1, 3C 2-cutout portion, 3S1, 3S 2-step portion, 30-first port, 31-outlet port, 32-second port, 33-sliding contact surface, 34-bonding surface, 4A-spool, 4As 1-side stepped portion, 4As 2-side stepped portion, 40A-spool body, 40A-opening edge portion, 40B-bowl portion (outer peripheral surface of spool), 40C-bowl-shaped recess portion, 40P-projection portion, 40S-sliding contact portion, 42-spring member, 44-connecting portion, 45-fastening band, 5-driving portion, 5 a-stepping motor, 5B-direct-driving mechanism, 50-housing portion, 51-magnetic rotor, 52-stator coil, 53-bearing member, 53A-first bearing hole, 54-partition wall member, 54 a-second bearing hole, 54 b-pair of partition holes, 54 d-partition wall, 55-male screw member, 55 a-fixing member, 55 d-male screw portion, 56-female screw member, 56 a-screw cylinder portion, 56a 1-female screw portion, 56 b-pair of connecting arm portions, 59-shaft member, 61-63-one end side adhesive reservoir (adhesive reservoir), 64-68, 67', 68' -side adhesive reservoir (adhesive reservoir), 71-one end side adhesive relief space (adhesive relief space), 72-side adhesive relief space (adhesive relief space), 200-compressor, 300-outdoor heat exchanger, 400-indoor heat exchanger, 500-throttle device, A, B-moving direction of adhesive, C1, C2-corner portion, ca-abutment region, cu1 '-first curve, cu 2' -second curve, cu 3-third curve, cu 4-fourth curve, G-groove, G1-installation gap between one end side guide and valve seat, G2-maximum installation gap between side guide and valve seat, L-axis, M-insertion direction, M1-movement direction, M2-movement direction, O-axis, P1, P2, P3, P4, P5-connection part, P1far, P2 far-maximum separation radius position, R0-maximum separation radius, s-sealing part, sa-thread joint region, ss-thread receiving space, thickness of T1, T2, T3-valve seat, vp-vertical wall, oozing width of adhesive on sliding contact surface in Wa 1-axis direction, oozing width of adhesive on sliding contact surface in Wa 2-axis direction orthogonal direction, protruding amount of WP-protruding part, protruding amount of WS-sliding contact part.

Detailed Description

An embodiment of the present invention will be described in detail with reference to fig. 1 to 11. However, the present invention is not limited to the embodiment.

< related terms >

In the description of the present specification and claims, "left", "right", "upper", "lower" show directions shown in fig. 1, 2, 3 (a), 4 (a), (c), 5 (a), (c), 6, and 10 (a), (c). In the description of the present specification and the claims, "one end side" and "the other end side" mean "left side in the axis direction (negative side in the X axis direction)", and "right side in the axis direction (positive side in the X axis direction)", respectively. In the description of the present specification and claims, "lateral" means "direction perpendicular to the axis (Y-axis direction)". In the description of the present specification and claims, "one side" and "the other side" mean "positive side in the Y axis direction" and "negative side in the Y axis direction". In the description of the present specification and claims, the "vertical direction" means "Z-axis direction". In the description of the present specification and claims, the "horizontal direction" means the "XY plane direction". In the description of the present specification and claims, the "maximum installation gap" means "a value obtained by summing up installation gaps of the pair of side guide portions and the valve seat portion in a direction orthogonal to the axis L". In the description of the present specification and claims, the "concave surface" means "a surface recessed downward". In the description of the present specification and claims, the "maximum separation radius" means "the radius farthest from the axis of the valve main body". In the description of the present specification and claims, the "maximum separation radius position" means "a position having a radius farthest from the axial center of the valve main body".

(first embodiment)

< about sliding type switching valve >)

The sliding type switching valve 100 according to the first embodiment will be described with reference to fig. 1. The sliding type switching valve 100 mainly includes a hollow cylindrical housing 1, a hollow cylindrical valve body 2, a valve seat portion 3 provided in the valve body 2 and having a plurality of valve ports aligned in the direction of the axis L, a valve body 4 slidably provided in a valve chamber 2a which is the interior of the valve body 2, and a driving portion 5 for driving the valve body 4 to slide. The respective configurations of the sliding type switching valve 100 will be described in order. Here, the axis L in the drawing is a central axis of the housing 1, the valve body 2, and the driving portion 5. For the purpose of explanation, the sliding type switching valve 100 in the present embodiment is a four-way switching valve, but the present invention is not limited thereto, and may be a two-way valve or a three-way switching valve, for example.

The case 1 is made of aluminum material and is formed in a bottomed tubular shape. In the case 1, an inlet path 1d is formed in the left side wall, and an insertion port 1a for inserting the valve body 2 is formed in the right side wall. A first path 1e, an outlet path 1s, and a second path 1c are formed in this order along the axis L as a plurality of cylindrical flow paths in the bottom wall of the housing 1. Here, the inlet path 1d and the outlet path 1s are connected to the discharge port and the suction port of the compressor 200 (see fig. 2), respectively, and the first path 1e and the second path 1c are connected to either one of the condenser and the evaporator, respectively, which will be described in detail below.

The valve body 2 is made of a resin material such as polyphenylene sulfide (PPS), is formed in a bottomed tubular shape having an axis O, and includes an inner peripheral wall 2b (see fig. 3 a), one end side wall 2c (see fig. 3 a), and the other end side opening 2d (see fig. 3 a), and defines a valve chamber (inside of the valve body) 2a therein. An inlet port 20 communicating with the valve chamber 2a is formed in one end side wall portion 2c of the valve body 2. A flat fixing surface 2bf (see fig. 3 a) is formed in the horizontal direction on the inner peripheral wall 2b below the valve main body 2, and a first connection flow path 21, an outlet connection flow path 22, and a second connection flow path 23 each including a plurality of cylindrical flow paths are formed in this order in the axial line L direction on the fixing surface 2 bf. Here, the inlet port 20 and the outlet connection channel 22 are connected to the inlet path 1d and the outlet path 1s, respectively, and the first connection channel 21 and the second connection channel 23 are connected to the first path 1e and the second path 1c, respectively. A metal cylindrical lower cover 24 is fixed to the right end of the valve body 2 by insert molding. The upper cover 25 is fixed to the lower cover 24 by welding or the like, and the upper cover 25 is fixed to the partition wall member 54 by insert molding, which will be described in detail below. In addition, O-rings 26 disposed at a predetermined interval in the axial direction L in a plurality of grooves G are provided on either the outer peripheral wall of the valve body 2 or the inner peripheral wall of the housing 1. Accordingly, the valve body 2 is inserted into the housing 1 from the insertion opening 1a of the housing 1, and is fixed to the housing 1 via the upper cover 25 by the retainer ring 27 having a C-shape, and at this time, the inlet path 1d, the second path 1C, the outlet path 1s, the first path 1e, and the outside (atmosphere) of the housing 1 between the valve body 2 and the housing 1 are sealed by the O-ring 26. The valve seat portion 3 is adhesively fixed to the valve body 2, which will be described in detail below.

The valve seat portion 3 is formed of a thin metal plate, and is adhesively fixed to the fixing surface 2bf of the valve body 2 (see fig. 3 (a)). In the valve seat portion 3, a first port 30 communicating with the first connecting passage 21, an outlet port 31 communicating with the outlet connecting passage 22, and a second port 32 communicating with the second connecting passage 23 are formed with a predetermined interval in the axis L direction, respectively. The first port 30, the outlet port 31, and the second port 32 are formed in a cylindrical shape having an inner diameter smaller than the inner diameters of the first connection flow path 21, the outlet connection flow path 22, and the second connection flow path 23. The surface of the valve seat portion 3 facing the valve chamber 2a forms a sliding contact surface 33.

The valve body 4 is mainly made of a resin material such as polyphenylene sulfide (PPS), and includes a valve body 40 having a bowl-shaped container inverted, and a coupling portion 44 protruding from the right end in the direction of the axis L. The valve body 4 is in sliding contact with the lower surface of the sliding contact surface 33 of the valve seat portion 3 while being in contact therewith, and a space is formed between the valve body and the valve seat portion 3.

The valve body 40 is opposed to the sliding contact surface 33 of the valve seat 3, and includes an opening edge 40a having an oblong shape extending in the direction of the axis L, a bowl-shaped portion (outer peripheral surface of the valve body) 40b protruding from the opening edge 40a toward the valve chamber 2a, and a bowl-shaped recess 40c provided in the bowl-shaped portion 40 b.

The opening edge 40a constitutes a seal section s that can be brought into sliding contact with the sliding contact surface 33. A spring member 42 is interposed between the top of the bowl-shaped portion 40b and the inner peripheral wall of the valve body 2, and the valve body 40 is biased toward the valve seat portion 3 by the spring member 42, so that a space between the valve chamber 2a outside the bowl-shaped portion 40b and the bowl-shaped recess 40c inside the bowl-shaped portion 40b is sealed.

The coupling portion 44 is formed in a hook shape so as to be coupled to the driving portion 5. The coupling portion 44 is coupled to the driving portion 5 via a shaft 59, which will be described in detail below.

The driving unit 5 is a portion for driving the valve body 4 to slide, and includes a stepping motor 5a as an electric motor having a rotatable rotor, and a linear motion mechanism 5b for converting rotation of the stepping motor 5a into linear motion and transmitting the linear motion to the valve body 4.

The stepping motor 5a includes a case 50 having a bottomed tubular shape, a magnetic rotor 51, and a stator coil 52.

The case portion 50 is formed of a thin plate-like metal material and has a bottomed tubular shape.

The magnetic rotor 51 is a rotary member and is disposed inside the casing 50.

The stator coil 52 is a fixture, and is disposed so as to surround the outer periphery of the magnetic rotor 51 around the axis L with the case portion 50 interposed therebetween.

The linear motion mechanism 5b includes a bearing member 53, a partition member 54, a male screw member 55, and a female screw member 56.

The bearing member 53 is made of a resin material such as polyphenylene sulfide (PPS), is disposed inside the bottom side of the housing portion 50, and has a first bearing hole 53a for axially supporting the right end portion of the externally threaded member 55 on the same axis as the axis L.

The partition wall member 54 is made of a resin material and is formed in a bottomed tubular shape. The upper cover 25 is fixed to the outer peripheral side of the partition wall member 54 by insert molding, and the upper cover 25 is made of a metal material and formed in a tapered shape. Here, the small diameter portion 25a of the upper cover 25 is fixed to the case portion 50 by welding or the like, and the inside of the driving portion 5 is closed. The large diameter portion 25b of the upper cover 25 is fixed to the lower cover 24 by welding or the like. Thus, the partition wall member 54, the housing portion 50, the bearing member 53, and the central axis of the valve body 2 are disposed on the same axis as the axis L. The partition wall 54d, which is the bottom of the partition wall member 54, has a second bearing hole 54a that pivotally supports the left end portion of the externally threaded member 55 on the same axis as the axis L, and a pair of partition wall holes 54b (only one side is shown in fig. 1) disposed through the second bearing hole 54 a.

The male screw member 55 is a rotor shaft having a male screw portion 55d on the outer peripheral surface, and is indirectly fixed to the center of the magnetic rotor 51 via a fixing member 55 a.

The female screw member 56 includes: a screw tube portion 56a having a female screw portion 56a1 formed on an inner peripheral surface thereof and being accommodated in the partition wall member 54 with a radial clearance; and a pair of coupling arm portions 56b (only one side is shown in fig. 1) that restrict rotation of the female screw member 56 about the axis L by a pair of partition wall holes 54b that are inserted through the partition wall member 54. The pair of coupling arm portions 56b are coupled to the valve body 4 via a shaft 59. Here, the female screw portion 56a1 and the male screw portion 55d are screwed together to form a screw feed mechanism. Here, the screw-coupled region Sa of the female screw portion 56a1 and the male screw portion 55d is always accommodated in the screw accommodation space Ss partitioned by the shell portion 50 and the partition wall member 54.

In the driving unit 5, when the male screw member 55 is rotated by the stepping motor 5a, the rotation of the male screw member 55 is converted into linear motion of the female screw member 56 by the screw feeding mechanism. By the linear movement of the female screw member 56, the valve body 4 coupled to the female screw member 56 is driven to advance and retreat so as to slide in the direction of the axis L.

In the present embodiment, the driving unit 5 for driving the valve body 4 to advance and retreat indirectly fixes the male screw member 55 to the magnetic rotor 51, but the present invention is not limited thereto, and for example, the male screw member 55 may be directly fixed to the magnetic rotor 51. The linear motion mechanism 5b in the present embodiment is configured as follows: the male screw member 55 is rotatably fixed to the housing 1, and the female screw member 56 is slidably movable in the axial direction L. However, the present invention is not limited to this, and for example, the female screw member 56 may be fixed rotatably with respect to the housing 1, and the male screw member 55 may be slidably advanced and retreated in the axis L direction. In the present embodiment, the sliding type switching valve 100 is used in a manner in which the valve body 4 is slid in the horizontal direction with the longitudinal axis L as the horizontal direction, but the present invention is not limited thereto, and for example, the sliding type switching valve may be used in a manner in which the valve body 4 is slid in the vertical direction with the longitudinal axis L as the vertical direction.

< action on sliding type switching valve >)

As shown in fig. 2, the sliding type switching valve 100 is used in a refrigeration cycle system, and the D-joint pipe 1D, C-joint pipe 1C, S-joint pipe 1S, E-joint pipe 1E is attached to each of the inlet path 1D, the second path 1c, the outlet path 1s, and the first path 1E. The sliding type switching valve 100 is driven to advance and retreat by the driving portion 5 so that the valve body 4 slides in the direction of the axis L, whereby the D-joint pipe 1D connected to the discharge port of the compressor 200 and the S-joint pipe 1S connected to the suction port of the compressor 200 are respectively communicated with either one of the C-joint pipe 1C connected to the outdoor heat exchanger 300 and the E-joint pipe 1E connected to the indoor heat exchanger 400. Thereby, the slide type switching valve 100 switches the fluid path of the refrigeration cycle.

< action on refrigeration cycle >

First, as shown in fig. 2, when the sliding type switching valve 100 drives the driving portion 5 to slide the valve body 4 to the left side in the direction of the axis L during the heating operation, the valve body 40 and the valve seat portion 3 cause the C-joint pipe 1C and the S-joint pipe 1S to communicate with each other via the bowl-shaped recess 40C, and the D-joint pipe 1D and the E-joint pipe 1E to communicate with each other via the valve chamber 2a and the first port 30. As a result, as shown by the solid line in fig. 2, the high-pressure refrigerant compressed by the compressor 200 flows from the D joint pipe 1D to the E joint pipe 1E through the valve chamber 2a, flows into the indoor heat exchanger 400, the throttle device 500, and the outdoor heat exchanger 300 in this order, flows from the C joint pipe 1C to the S joint pipe 1S through the bowl-shaped concave portion 40C, and then circulates to the compressor 200. At this time, the outdoor heat exchanger 300 functions as an evaporator (evaporator), and the indoor heat exchanger 400 functions as a condenser (condenser).

Next, during the cooling operation, as shown in fig. 1, when the slide switching valve 100 drives the driving portion 5 to slide the valve body 4 to the right side position in the axis L direction, the valve body 40 and the valve seat portion 3 cause the S joint pipe 1S and the E joint pipe 1E to communicate via the bowl-shaped recess 40C, and the D joint pipe 1D and the C joint pipe 1C to communicate via the valve chamber 2a and the second port 32. As a result, as indicated by the broken-line arrows in fig. 2, the high-pressure refrigerant compressed by the compressor 200 flows from the D joint pipe 1D to the C joint pipe 1C through the valve chamber 2a, flows into the outdoor heat exchanger 300, the throttle device 500, and the indoor heat exchanger 400 in this order, flows from the E joint pipe 1E to the S joint pipe 1S through the bowl-shaped concave portion 40C, and then circulates to the compressor 200. At this time, during the cooling operation, the refrigerant circulates in the opposite direction to that during the heating operation, the outdoor heat exchanger 300 functions as a condenser (condenser), and the indoor heat exchanger 400 functions as an evaporator (evaporator).

Positioning mechanism for valve seat

In the conventional sliding type switching valve, as described above, since the convex portion formed in the valve seat portion and the concave groove formed in the valve seat receiving portion are fitted to each other as the positioning mechanism of the valve seat portion, warpage and deformation may occur on the sliding contact surface as the upper surface of the valve seat portion, and sealability with the valve body may be impaired. As a result, the conventional sliding type switching valve has a first problem (problem caused by the positioning mechanism of the valve seat portion) in the prior art.

In contrast, in the sliding type switching valve 100 according to the present embodiment, first, in order to solve the first problem (the problem caused by the positioning mechanism of the valve seat portion), the positioning mechanism of the valve seat portion employs a guide portion for positioning provided in the valve seat portion of the valve body instead of the protruding portion formed in the valve seat portion, which will be described in detail below.

< about the guide >)

As shown in fig. 3 (b), guide portions 2bg, 2cg are formed on the fixed surface 2bf of the valve body 2, and are erected in the vertical direction of the fixed surface 2bf from the peripheral edge portions of three sides of the fixed surface 2 bf. The guide portions 2bg and 2cg include one end side guide portions (guide portions) 2cg (see the hatched pattern in fig. 3) formed on one end side in the axis L direction of the peripheral portion of the fixed surface 2bf, and a pair of side guide portions (guide portions) 2bg (see the dot pattern in fig. 3) formed on a pair of sides in the direction orthogonal to the axis L of the peripheral portion of the fixed surface 2 bf. As shown in fig. 3 (a) to (c), the one-end guide portion 2cg is formed on the valve chamber 2a side of the one-end side wall portion 2c, and the pair of side guide portions 2bg are formed on the lower side of the inner peripheral wall 2 b. Here, in the direction orthogonal to the axis L, the distance between the pair of side guides 2bg is set slightly larger than the width of the valve seat 3 in consideration of the mounting error. In order to allow the one-end-side guide portion 2cg and the pair of side guide portions 2bg to come into contact with the valve seat portion 3, as shown in fig. 4 (c), the vertical forming regions of the one-end-side guide portion 2cg and the pair of side guide portions 2bg are set to include a region above the valve seat portion 3

The guide portions 2bg and 2cg of the present embodiment are provided so as to stand from the peripheral edge portions of three sides of the fixed surface 2bf, but the present invention is not limited to this, and the positioning of the valve seat portion 3 can be performed by using the peripheral edge portions of two sides via a common corner portion, and thus, for example, the guide portions may stand from the peripheral edge portions of two sides formed by one side (positive side in the Y axis direction) or the other side (negative side in the Y axis direction) of the pair of side guide portions 2bg and the one end side guide portion 2 cg. Further, the fixing surface 2bf may be erected from all (four) peripheral edge portions. Here, it is preferable to insert and position the valve seat portion 3 described below with respect to the fixing surface 2bf of the valve main body 2 in a manner of being erected from the peripheral edge portions of three sides of the fixing surface 2 bf.

Fixing mechanism for valve seat

In a conventional sliding type switching valve, a weld-fixing is used as a fixing mechanism for a valve seat portion, and a sliding contact surface as an upper surface of the valve seat portion is deformed due to a thermal influence caused by the weld-fixing, so that it is necessary to perform a surface finishing on the sliding contact surface. As a result, the conventional sliding type switching valve has a second problem (problem caused by the fixing mechanism of the valve seat portion) in the conventional art.

In contrast, in the sliding type switching valve 100 according to the present embodiment, first, in order to solve the second problem (the problem caused by the fixing mechanism of the valve seat portion), adhesive fixing is used as the fixing mechanism of the valve seat portion 3 instead of welding fixing. The adhesive used for the adhesive fixation includes epoxy resin type, acrylic resin type, urethane resin type, silicone type, and vinyl acetate type.

< mounting Process for valve seat portion >

The mounting process of the valve seat portion 3 to the valve body 2 will be described with reference to fig. 4. As shown in fig. 4 (a) and (b), the valve seat portion 3 includes a sliding contact surface 33 on which the valve body 4 is slidably contacted, and an adhesive surface 34 on the opposite side of the sliding contact surface 33 to which an adhesive is applied. First, an adhesive is applied to the adhesive surface 34. Thereafter, in the insertion direction M of fig. 4 (c), the valve seat portion 3 is inserted into the valve chamber 2a through the opening 2d on the other end side of the valve body 2, and the bonding surface 34 of the valve seat portion 3 is bonded and fixed while being pressed against the fixing surface 2bf of the valve body 2. At this time, the valve seat portion 3 is positioned in the direction of the axis L by the pair of side guide portions 2bg by sliding the valve seat portion 3 toward one end side in the direction of the axis L and finally by abutting the valve seat portion 3 against the one end side guide portion 2 cg. As described above, in the present embodiment, since the positioning mechanism of the valve seat portion 3 is provided in the valve body 2 instead of the valve seat portion 3, the valve seat portion 3 is not warped or deformed, and the positioning to the valve body 2 can be performed while maintaining the flatness of the sliding contact surface 33, the first problem (the problem caused by the positioning mechanism of the valve seat portion) in the related art can be solved. In the present embodiment, since the shape of the other end side of the valve seat portion 3 in the axial direction L has a nonlinear shape as shown in fig. 4 (b) and (d), the mounting direction (axial direction L and front-back direction) can be prevented from being incorrect by visual observation. In the present embodiment, the structure in which the adhesive is applied to the valve seat portion 3 is used for the sake of explanation, but the present invention is not limited thereto, and for example, the adhesive may be applied to the fixing surface 2bf of the valve body 2.

< New problem point concerning the fixing mechanism (adhesive fixing) of the valve seat portion)

From here, a new problem caused by the use of the adhesive fixing as the fixing means of the valve seat portion 3 will be described with reference to fig. 5. In fig. 5 (a), the linear motion mechanism 5b and the like connected to the valve body 4 are omitted for the sake of explanation. In fig. 5 (c) and 5 (d), the gap between the valve seat portion 3 and the valve body 2 (in particular, the bonding surface 34 of the valve seat portion 3 and the bonding surface 34 of the valve body 2 are in contact) is exaggeratedly shown for emphasizing the adhesive Ad.

As shown in fig. 5 (a) and (b), after the valve seat portion 3 is bonded and fixed to the fixing surface 2bf of the valve body 2, the valve body 4 is inserted into the valve chamber 2a from the opening 2d on the other end side of the valve body 2, and the opening edge portion 40a of the valve body 4 is brought into contact with the sliding contact surface 33 of the valve seat portion 3 in a slidable manner. Here, in order to enable smooth sliding of the valve body 4 along the axis L, the interval between the pair of side guides 2bg is set to be slightly larger than the width of the valve body 4 in the direction orthogonal to the axis L.

As shown in fig. 5 (c) and (d) as a comparative example, when the valve seat portion 3 is fixed to the valve body 2, the adhesive Ad is pushed out in the vertical direction and the horizontal direction from the adhesive surface 34 of the valve seat portion 3 through the gap between the valve seat portion 3 and the valve body 2. Therefore, the adhesive Ad is pushed out in the moving direction A, B, and is hardened in a state of oozing out from the gap between the valve seat portion 3 and the valve body 2 toward the sliding contact surface 33 of the valve seat portion 3.

In this way, by adopting the fixing means for adhesively fixing the valve seat portion 3, there is a concern that the sealing performance is impaired by the adhesive Ad being jumped to the opening edge portion 40a of the valve body 4 sliding with respect to the valve seat portion 3, and a concern that the working failure occurs in the case where the valve body 4 is fixedly attached to the valve seat portion 3 or the like by the adhesive Ad being interposed.

In contrast, in the first embodiment, the adhesive reservoirs 61 to 66 are formed so as to prevent the adhesive Ad from oozing out from the adhesive surface 34 of the valve seat portion 3 onto the sliding contact surface 33. In the first embodiment, the adhesive reservoirs 61 to 66 are roughly classified into a form 1 (one-end-side adhesive reservoirs 61 to 63) and a form 2 (side adhesive reservoirs 64 to 66) according to the formation positions thereof, which will be described in detail below. The following description will be given of the first embodiment in order of the first embodiment in form 1 and the first embodiment in form 2.

(form 1 of the first embodiment)

As shown in fig. 6 (a) to (c), the form 1 of the first embodiment is configured from three forms 1-1 to 1-3 according to the members forming the one-end-side adhesive reservoirs 61 to 63 and the shape of the adhesive reservoir.

(form 1-1)

As shown in fig. 6 (a), a recess 2cr is formed at the lower end of the one-end-side guide portion 2cg, and the recess 2cr is recessed toward one end side in the direction of the axis L and extends in a direction orthogonal to the axis L. The one-end adhesive reservoir 61 is divided between the recess 2cr and the facing surface of the valve seat 3 facing the recess 2cr, and has a rectangular cross section. In embodiment 1-1, the one-end-side adhesive reservoir 61 is formed continuously with the fixing surface 2bf of the valve body 2A in the horizontal direction, but the present invention is not limited to this, and it may be formed on any one of the opposing surfaces of the one-end-side guide portion 2cg opposing the valve seat portion 3, for example.

The one-end adhesive reservoir 61 has a width X1 in the direction of the axis L, a height Z1 in the vertical direction, and a depth D1 (not shown) in the direction orthogonal to the axis L, and has a total volume of x1×z1×d1. Since the total volume of the one-end adhesive reservoir 61 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat 3 to the fixing surface 2bf, even if the adhesive Ad is stored in the one-end adhesive reservoir 61, the one-end adhesive reservoir 61 is not entirely filled with the adhesive Ad. In the direction of the axis L, the one-end-side adhesive reservoir 61 has a width X1 (X1 > G1) larger than the mounting gap G1 between the one-end-side guide portion 2cg and the valve seat portion 3. Thus, when the valve seat portion 3 is attached to the fixing surface 2bf, even if the pressure of the adhesive Ad is locally increased and the adhesive Ad is to rise at a relatively high speed in the gap between the one-end-side guide portion 2cg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the one-end-side adhesive reservoir portion 61 in the path thereof, and as a result, the adhesive Ad can be stored in a stable state inside the one-end-side adhesive reservoir portion 61.

Here, when the mounting gap g1+ 0, that is, when the one-end guide portion 2cg is not in contact with the valve seat portion 3, the upper space of the one-end adhesive reservoir 61 communicates with the valve chamber 2 a. At this time, the adhesive Ad is introduced into the one-end-side adhesive reservoir 61 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed in the adhesive reservoir 61 at one end.

On the other hand, in the case where the mounting gap g1=0, that is, in the case where the one end side guide portion 2cg is in contact with the valve seat portion 3, the upper space of the one end side adhesive reservoir 61 communicates with the valve chamber 2a via a gap between the pair of side guide portions 2bg and the valve seat portion 3 in the direction orthogonal to the axis L described below, and therefore, the adhesive Ad is brought into a state of being introduced into the one end side adhesive reservoir 61 as in the case where the mounting gap g1+.0 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed in the adhesive reservoir 61 at one end.

As described above, in the embodiment 1-1, since the one-end guide portion 2cg and the adhesive fixing are used instead of the weld fixing as the fixing means for the valve seat portion 3, the first and second problems (problems caused by the positioning means for the valve seat portion and the fixing means for the valve seat portion) can be eliminated, and unlike the comparative example in fig. 5 (c), the one-end adhesive reservoir 61 is used, so that the adhesive can be prevented from oozing out from the adhesive surface 34 of the valve seat portion 3 onto the sliding contact surface 33, and the new problem of the fixing means for the valve seat portion (adhesive fixing) can be solved.

As described above, in embodiment 1-1, the use of the one-end adhesive reservoir 61 can solve all of the conventional first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion).

(form 1-2)

As shown in fig. 6 (b), a notched portion 3c1 to which chamfering is applied is formed at a lower corner of the valve seat portion 3A so as to extend in a direction orthogonal to the axis L. The one-end-side adhesive reservoir 62 is divided between the cutout portion 3c1, the one-end-side guide portion 2cg, and the fixing surface 2bf, and has a triangular cross section. In embodiment 1-2, the one-end-side adhesive reservoir 62 is formed in the lower corner of the valve seat 3A, but the present invention is not limited thereto, and may be formed in the upper corner of the valve seat 3A, for example.

The one-end adhesive reservoir 62 has a width X2 in the direction of the axis L, a height Z2 in the vertical direction, and a depth D2 (not shown) in the direction orthogonal to the axis L, and has a total volume of (x2×z2×d2)/2. Since the total volume of the one-end adhesive reservoir 62 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat portion 3A to the fixing surface 2bf, even if the adhesive Ad is stored in the one-end adhesive reservoir 62, the one-end adhesive reservoir 62 is not entirely filled with the adhesive Ad. In the direction of the axis L, the one-end-side adhesive reservoir 62 has a width X2 (X2 > G1) larger than the mounting gap G1 between the one-end-side guide portion 2cg and the valve seat portion 3. Thus, even when the adhesive Ad is to rise at a relatively high speed in the gap between the one-end-side guide portion 2cg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the one-end-side adhesive reservoir portion 62 in the path thereof, as in the case of embodiment 1-1, and as a result, the adhesive Ad can be stored in a stable state inside the one-end-side adhesive reservoir portion 62.

Here, in the case where the mounting gap g1+ 0, as in the case of the embodiment 1-1, the upper space of the one-end side adhesive reservoir 62 communicates with the valve chamber 2a, and therefore, the adhesive Ad is introduced into the one-end side adhesive reservoir 62 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed in the adhesive reservoir 62 at one end.

On the other hand, when the mounting gap g1=0, as in the case of the embodiment 1-1, the upper space of the one-end adhesive reservoir 61 communicates with the valve chamber 2a via a gap between the pair of side guides 2bg and the valve seat 3 in the direction orthogonal to the axis L, and therefore, the adhesive Ad is introduced into the one-end adhesive reservoir 61 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed in the adhesive reservoir 61 at one end.

As described above, in the embodiment 1-2, the use of the one-end-side adhesive reservoir 62 can provide the same effect as the embodiment 1-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art. In addition, in the embodiments 1 to 2, the one-end adhesive reservoir 62 is provided by chamfering the plate-shaped valve seat portion 3A, and is not provided with the valve body 2 having a complicated shape, so that the processing cost can be suppressed.

(forms 1-3)

As shown in fig. 6 (c), a step 3s1 recessed toward the other end side in the direction of the axis L and extending in a direction orthogonal to the axis L is formed in the upper corner of the valve seat 3B. The one-end-side adhesive reservoir 63 is divided between the step 3s1 and the facing surface of the one-end-side guide 2cg facing the step 3s1, and has a rectangular cross section. In embodiments 1 to 3, the one-end-side adhesive reservoir 63 is formed in the upper corner of the valve seat 3B, but the present invention is not limited to this, and it may be formed on any one of the opposed surfaces of the valve seat 3B opposed to the one-end-side guide 2 cg.

The one-end adhesive reservoir 63 has a width X3 in the direction of the axis L, a height Z3 in the vertical direction, and a depth D3 (not shown) in the direction orthogonal to the axis L, and has a total volume (x3×z3×d3). Since the total volume of the one-end adhesive reservoir 63 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat 3B to the fixing surface 2bf, even if the adhesive Ad is stored in the one-end adhesive reservoir 63, the one-end adhesive reservoir 63 is not completely filled with the adhesive Ad. In the axis L direction (X axis direction), the one-end-side adhesive reservoir 63 has a width X3 (X3 > G1) larger than the mounting gap G1 between the one-end-side guide portion 2cg and the valve seat portion 3B. Thus, even when the adhesive Ad is to rise at a relatively high speed in the gap between the one-end-side guide portion 2cg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the one-end-side adhesive reservoir portion 63 in the path thereof, as in the case of embodiment 1-1, and as a result, the adhesive Ad can be stored in a stable state inside the one-end-side adhesive reservoir portion 63.

Here, in any of the cases of the mounting clearances g1+.0 and g1=0 in the embodiments 1 to 3, the upper space of the one-end side adhesive reservoir 63 communicates with the valve chamber 2a, and therefore, the adhesive Ad is introduced into the one-end side adhesive reservoir 63 due to the surface tension generated by the adhesive Ad. Then, the adhesive Ad having the concave surface and cured can be visually disposed in the adhesive reservoir 63 at one end. Further, since the one-end-side adhesive reservoir 63 is provided above the gap between the one-end-side guide portion 2cg and the valve seat portion 3, the bonding area between the one-end-side guide portion 2cg and the valve seat portion 3 is large, and the bonding strength of the valve seat portion 3 to the valve body 2 can be improved.

As described above, in the embodiment 1-3, the use of the one-end-side adhesive reservoir 63 can provide the same effect as the embodiment 1-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art. In addition, in the embodiments 1 to 3, the same effect as in the embodiments 1 to 2 can be obtained, that is, the one-end-side adhesive reservoir 63 is provided by performing stepped processing on the plate-shaped valve seat portion 3B, so that the processing cost can be suppressed. In addition, in the embodiments 1 to 3, since the adhesive Ad having the concave surface and being cured can be visually disposed in the adhesive reservoir 63 on the one end side, the adhesive Ad can be more reliably prevented from oozing out onto the sliding contact surface 33. In addition, in the embodiments 1 to 3, since the bonding area between the one end guide portion 2cg and the valve seat portion 3 is large, the bonding strength of the valve seat portion 3 to the valve body 2 can be improved.

(form 2 of the first embodiment)

As shown in fig. 7 (a) to (c), the form 2 of the first embodiment is configured from three forms 2-1 to 2-3 depending on the members forming the side adhesive reservoirs 64 to 66 and the shape of the adhesive reservoir. In consideration of the mounting error, the interval between the pair of side guides 2bg is set slightly larger than the width of the valve seat portion 3 in the direction orthogonal to the axis L. Here, the maximum attachment gap G2 is a value obtained by adding up the attachment gaps of the pair of side guide portions 2bg and the valve seat portion 3, which is a gap generated when the valve seat portion 3 is attached to one side of the pair of side guide portions 2bg in the direction orthogonal to the axis L, and is set to be larger than zero (G2 > 0).

(form 2-1)

As shown in fig. 7 (a), a recess 2br extending in the direction of the axis L is formed in the lower end portion of the side guide 2bg so as to be recessed to one side (positive side in the Y-axis direction) in the direction orthogonal to the axis L. The side adhesive reservoir 64 is divided between the recess 2br and the facing surface of the valve seat 3 facing the recess 2br, and has a rectangular cross section. In embodiment 2-1, the side Fang Nianjie agent reservoir 64 is formed continuously with the fixing surface 2bf of the valve body 2B in the horizontal direction, but the present invention is not limited thereto, and it may be formed on any of the opposing surfaces of the side guide portion 2bg opposing the valve seat portion 3, for example.

The side adhesive reservoir 64 has a width Y1 in a direction perpendicular to the axis L, a height Z4 in a vertical direction, and a depth D4 (not shown) in the direction of the axis L, and has a total volume y1×z4×d4. Since the total volume of the side adhesive reservoir 64 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat 3 and the fixing surface 2bf, even if the adhesive Ad is stored in the side adhesive reservoir 64, the side Fang Nianjie adhesive reservoir 64 is not entirely filled with the adhesive Ad. In addition, in the direction orthogonal to the axis L, the side Fang Nianjie agent reservoir 64 has a width Y1 (Y1 > G2) larger than the maximum mounting gap G2 between the side guide portion 2bg and the valve seat portion 3. Accordingly, when the valve seat portion 3 is attached to the fixing surface 2bf, even if the pressure of the adhesive Ad is locally increased and the adhesive Ad is to rise at a relatively high speed in the gap between the side guide portion 2bg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the side adhesive reservoir portion 64 in the path thereof, and as a result, the adhesive Ad can be stored in a stable state inside the side adhesive reservoir portion 64.

As shown in fig. 7 (a), the upper space of the side Fang Nianjie agent reservoir 64 communicates with the valve chamber 2 a. At this time, the adhesive Ad is introduced into the side adhesive reservoir 64 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed inside the side adhesive reservoir 64.

As described above, in the embodiment 2-1, the use of the side adhesive reservoir 64 can provide the same effect as the embodiment 1-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art. In addition, in the embodiment 2-1, as shown in fig. 4 (d), the side guide portion 2bg in which the recess portion 2br is formed is opened at the other end side (right side in the drawing) in the axis L direction, so that the adhesive Ad stored in the side adhesive reservoir 64 can flow out from the opened side of the side adhesive reservoir 64 before curing. This can more reliably prevent the adhesive Ad from oozing out onto the sliding contact surface 33. In this case, the adhesive Ad flows out onto the fixing surface 2bf (see fig. 4 (c)) separated downward from the sliding contact surface 33 of the valve seat portion 3, and thus the problem of interference between the adhesive Ad and the opening edge portion 40a of the valve body 4 does not occur.

(form 2-2)

As shown in fig. 7 b, a notched portion 3C2 to which chamfering is applied is formed to extend in the direction of the axis L at a lower corner portion of one side (positive side in the Y-axis direction) of the valve seat portion 3C in the direction orthogonal to the axis L. The side adhesive reservoir 65 is divided between the cutout portion 3c2, the side guide portion 2bg, and the fixing surface 2bf, and has a triangular cross section. In embodiment 2-2, the side Fang Nianjie agent reservoir 65 is formed at the lower corner of the valve seat portion 3C, but the present invention is not limited thereto, and may be formed at the upper corner of the valve seat portion 3C, for example.

The side adhesive reservoir 65 has a width Y2 in a direction perpendicular to the axis L, a height Z5 in a vertical direction, and a depth D5 (not shown) in the axis L, and a total volume of (y2×z5×d5)/2. Since the total volume of the side adhesive reservoir 65 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat 3 to the fixing surface 2bf, even if the adhesive Ad is stored in the side adhesive reservoir 65, the side Fang Nianjie adhesive reservoir 65 is not completely filled with the adhesive Ad. In addition, in the direction orthogonal to the axis L, the side Fang Nianjie agent reservoir 65 has a width Y2 (Y2 > G2) larger than the maximum mounting gap G2 between the side guide portion 2bg and the valve seat portion 3C. As a result, even when the adhesive Ad is to rise at a relatively high speed in the gap between the side guide portion 2bg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the side adhesive reservoir portion 65 in the path thereof, as in the case of embodiment 2-1, and as a result, the adhesive Ad can be stored in a stable state inside the side adhesive reservoir portion 65.

As shown in fig. 7 (b), as in the case of embodiment 2-1, the upper space of the side Fang Nianjie agent reservoir 65 communicates with the valve chamber 2a, and therefore, the adhesive Ad is introduced into the side adhesive reservoir 65 due to the surface tension generated by the adhesive Ad. Then, an adhesive Ad having a concave surface and being cured is disposed inside the side adhesive reservoir 65.

As described above, in the embodiment 2-2, the use of the side adhesive reservoir 65 can provide the same effects as in the embodiment 2-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art, and can allow the adhesive Ad to flow out from the open side of the side adhesive reservoir 65, thereby making it possible to more reliably avoid the adhesive Ad from oozing out onto the sliding contact surface 33. In addition, in embodiment 2-2, the side adhesive reservoir 65 is provided by chamfering the plate-shaped valve seat portion 3C, and is not provided with the valve body 2 having a complicated shape, so that the processing cost can be suppressed.

(morphology 2-3)

As shown in fig. 7 c, a step 3s2 recessed toward the other side (the negative side in the Y-axis direction) in the direction perpendicular to the axis L and extending in the X-axis direction is formed in the upper corner of the valve seat 3D on the one side (the positive side in the Y-axis direction) in the direction perpendicular to the axis L. The side adhesive reservoir 66 is divided between the step 3s2 and the facing surface of the side guide 2bg facing the step 3s2, and has a rectangular cross section. In addition, in the embodiment 2-3, the side Fang Nianjie agent reservoir 66 is formed at the upper corner of the valve seat portion 3D, but the present invention is not limited thereto, and it may be formed on any one of the facing surfaces of the valve seat portion 3D facing the side guide portion 2bg, for example.

The side adhesive reservoir 66 has a width Y3 in a direction perpendicular to the axis L, a height Z6 in a vertical direction, and a depth D6 (not shown) in the direction of the axis L, and has a total volume of y3×z6×d6. Since the total volume of the side adhesive reservoir 66 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat portion 3D to the fixing surface 2bf, even if the adhesive Ad is stored in the side adhesive reservoir 66, the side Fang Nianjie adhesive reservoir 66 is not entirely filled with the adhesive Ad. In addition, in the direction (Y axis direction) orthogonal to the axis L, the side Fang Nianjie agent reservoir 66 has a width Y3 (Y3 > G2) larger than the maximum mounting gap G2 between the side guide portion 2bg and the valve seat portion 3D. As a result, even when the adhesive Ad is to rise at a relatively high speed in the gap between the side guide portion 2bg and the valve seat portion 3, the speed of the adhesive Ad can be suppressed by passing through the side adhesive reservoir portion 66 in the path thereof, as in the case of embodiment 2-1, and as a result, the adhesive Ad can be stored in a stable state inside the side adhesive reservoir portion 66.

As shown in fig. 7 (c), as in the case of embodiment 2-1, the upper space of the side Fang Nianjie agent reservoir 66 communicates with the valve chamber 2a, and therefore, the adhesive Ad is introduced into the side adhesive reservoir 66 due to the surface tension generated by the adhesive Ad. Thereafter, the adhesive Ad having the concave surface and cured can be visually disposed in the side adhesive reservoir 66. Further, since the side adhesive reservoir 66 is provided above the gap between the side guide portion 2bg and the valve seat portion 3, the bonding area between the side guide portion 2bg and the valve seat portion 3 is large, and the bonding strength of the valve seat portion 3 to the valve body 2 can be improved.

As described above, in the embodiment 2-3, the use of the side adhesive reservoir 66 can provide the same effects as the embodiment 2-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art, and can allow the adhesive Ad to flow out from the open side of the side adhesive reservoir 66, thereby making it possible to more reliably avoid the adhesive Ad from oozing out onto the sliding contact surface 33. In addition, in the embodiment 2-3, the same effect as in the embodiment 2-2 can be obtained, that is, since the side Fang Nianjie agent reservoir 66 is provided by stepped processing of the plate-shaped valve seat portion 3D, the processing cost can be suppressed. In addition, in the embodiments 2 to 3, the adhesive Ad having the concave surface and being cured can be visually disposed in the side Fang Nianjie agent reservoir 66, so that the adhesive Ad can be more reliably prevented from oozing out onto the sliding contact surface 33. In addition, in the embodiment 2-3, since the bonding area between the side guide portion 2bg and the valve seat portion 3 is large, the bonding strength of the valve seat portion 3 to the valve body 2 can be improved.

In the present embodiment described above, for the purpose of explanation, the side adhesive reservoirs 64 to 66 are formed only on one side (the positive side in the Y-axis direction) of the pair of side guides 2bg in the direction orthogonal to the axis L in the modes 2-1 to 2-3, but the present invention is not limited thereto, and may be formed only on the other side (the negative side in the Y-axis direction) of the pair of side guides 2bg in the direction orthogonal to the axis L, or may be formed on both sides. In the present embodiment, the modes 1-1 to 1-3 and the modes 2-1 to 2-3 are provided separately, but the present invention is not limited thereto, and for example, the modes 1-1 to 1-3 and the modes 2-1 to 2-3 may be appropriately combined. In the present embodiment, even when the configurations 1-1 to 1-3 and the configurations 2-1 to 2-3 are combined, the total volume of the combined adhesive reservoirs 61 to 66 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat portions 3, 3A, 3B, 3C, 3D to the fixing surface 2bf, and the adhesive Ad having the concave surfaces and being cured is set to be disposed in the combined adhesive reservoirs 61 to 66. In the case of combining the modes 1-1 to 1-3 and the modes 2-1 to 2-3, it is preferable to combine the modes so that the one-end side adhesive reservoirs 61 to 63 and the side Fang Nianjie agent reservoirs 64 to 66 are easily communicated.

< New problem point concerning side Fang Nianjie agent reservoir >)

From here, a new problem caused by the side adhesive reservoir 64 will be described with reference to fig. 7 (a).

First, in general, when an internal pressure is applied to a thin-walled cylindrical pressure vessel, circumferential stress in the circumferential direction and axial stress in the axial direction are generated as stresses receiving the internal pressure. Although a detailed description is omitted, the circumferential stress is 2 times the axial stress. The description can be made in the same manner as for the valve body 2 having a substantially cylindrical shape.

For example, as shown in fig. 6 (a) and 7 (a), the one-end adhesive reservoir 61 and the side adhesive reservoir 64 have corners between the fixing surface 2bf, respectively. Accordingly, when the pressure in the valve chamber 2a increases, axial stress is generated in the direction of inward angular expansion at the corner of the one-end-side adhesive reservoir 61, and circumferential stress is generated in the direction of inward angular expansion at the corner C1 of the side adhesive reservoir 64. Here, since the circumferential stress is 2 times greater than the axial stress as described above, a large stress concentration occurs particularly in the corner C1 of the side adhesive reservoir 64, and there is a concern that cracks may occur and the valve body 2 may break.

In contrast, in the first embodiment 3 and the first embodiment 4, the corner portions of the side adhesive reservoirs 67, 67', 68' are formed with the arc angles extending in the direction of the axis L and having the arc cross-sectional shape, so that the stress concentration at the corner portions can be relaxed, the compressive strength of the valve main bodies 2', 2", 2'" and can be improved, and as a result, the new problem of the side adhesive reservoirs can be solved.

The corner portions of the side adhesive reservoirs 67, 67', 68' have positions P1far, P2far from the axis O of the valve main body 2', 2", 2'", 2"" (hereinafter referred to as "maximum separation radius") R0 (hereinafter referred to as "maximum separation radius positions") and thus serve as starting points for stress concentration. Accordingly, by setting the radius of curvature of the circular arc angle at the corner of the side adhesive reservoir 67, 67', 68' to a predetermined range (0.5T or more and not more than the maximum separation radius R0), the stress concentration can be relaxed more reliably, and the compressive strength of the valve body can be further improved. Here, T shows the plate thickness of the valve seat portion. In addition, when the radius of curvature at the corners of the side adhesive reservoirs 67, 67', 68' is smaller than 0.5T, the effect of relaxing the stress concentration is small, and therefore, it is necessary to combine with other curves. In addition, when the radius of curvature at the corners of the side adhesive reservoirs 67, 67', 68' exceeds the maximum separation radius R0, the corners of the side Fang Nianjie agent reservoirs 67, 67', 68' are no longer at the maximum separation radius positions, and therefore it is necessary to form circular arc angles with respect to the newly formed maximum separation radius positions.

Thus, as a specific example, the radius of curvature of the circular arc angle formed at the maximum separation radius positions P1far, P2far is roughly divided into a form 3 (side adhesive reservoir 67, 67 ') in which a smaller value is selected in a predetermined range and a form 4 (side adhesive reservoir 68, 68') in which a larger value is selected. The following describes the procedure of embodiment 3 of the first embodiment and embodiment 4 of the first embodiment with reference to fig. 8 and 9. In addition, the one-dot chain lines shown along the valve main bodies 2', 2", 2'", 2"" in fig. 8 and 9 represent circles or circular arcs having the maximum separation radius R0.

(form 3 of the first embodiment)

As shown in fig. 8 (b) and (c), in the form 3 of the first embodiment, the radius of curvature of the circular arc angle at the maximum separation radius position P1far of the side Fang Nianjie agent reservoirs 67, 67' is selected to be a relatively small value (here, 0.5T as the minimum value) in the range of 0.5T or more and the maximum separation radius R0 or less. The side Fang Nianjie agent reservoir is formed in two modes, namely, form 3-1 and form 3-2, depending on the shape of the agent reservoir.

(form 3-1)

As shown in fig. 8 (a) and (b), the corner of the side adhesive reservoir 67 connecting the pair of side guides 2bg and the fixing surface 2bf in the direction orthogonal to the axis L becomes the maximum separation radius position P1far and becomes the starting point of stress concentration, and therefore, in order to alleviate the stress concentration, an arc angle composed of the first curve Cu1 having a radius of curvature of 0.5t1 is formed at the maximum separation radius position P1 far. Here, T1 represents the plate thickness of the valve seat portion 3'. Thus, the side Fang Nianjie agent reservoir 67 has a concave portion 2br formed by one curve (only the first curve Cu 1) at the arc angle.

As described above, in the embodiment 3-1, the use of the side adhesive reservoir 67 having the circular arc angle formed by one curve (only the first curve Cu 1) can provide the same effect as the embodiment 2-1, that is, can eliminate all of the first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) in the related art. In addition, in the embodiment 3-1, by forming the circular arc angle formed by the first curve Cu1 at the maximum separation radius position P1far, the stress concentration can be reliably relaxed, and thus, the new problem of the side adhesive reservoir can be eliminated. Further, by selecting a relatively small radius of curvature as the radius of curvature R1 of the first curve Cu1, the volume of the side adhesive reservoir 67 can be appropriately set, and the area of the side guide 2bg can be ensured. In addition, the arc angle of the side adhesive reservoir 67 can be formed with one curve (only the first curve Cu 1), and thus can be formed relatively easily.

(morphology 3-2)

As shown in fig. 8 (c), since the maximum separation radius position P1far serves as a starting point of stress concentration in the same manner as in the case of the embodiment 3-1, an arc angle formed by the first curve Cu1' having a curvature radius of 0.5T2 is formed at the maximum separation radius position P1far in order to alleviate the stress concentration. Here, T2 represents the plate thickness of the valve seat portion 3″. In order to expand the area of the side guide portion 2bg, a second curve Cu2 (radius of curvature R2: less than 0.5T2) is continuously and smoothly connected to one side (positive side in the Y-axis direction) of the first curve Cu1' via a connecting portion P1, and the second curve Cu2 is connected to the lower end portion of the side guide portion 2 bg. In fig. 8 c, the radius of curvature R2 of the second curve Cu2 is 0.3T2, and the plate thickness T2 of the valve seat portion 3″ is smaller than the plate thickness T1 of the valve seat portion 3' (T2 < T1). Thus, the side Fang Nianjie agent reservoir 67 'has a concave portion 2br formed by two curves (a first curve Cu1' and a second curve Cu 2).

As described above, in the embodiment 3-2, the use of the side adhesive reservoir 67 'having the circular arc angle formed by the two curves (the first curve Cu1' and the second curve Cu 2) can provide the same effect as the embodiment 3-1, that is, can completely eliminate the existing first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) and the new problem of the side Fang Nianjie agent reservoir. In addition, in the form 3-2 of the present embodiment, since the second curve Cu2 (having the smaller radius of curvature R2 than the first curve Cu1 ') is continuously and smoothly connected to one side of the first curve Cu1', the height of the side adhesive reservoir 67' can be reduced as compared with the form 3-1 of the present embodiment, and the area of the side guide portion 2bg can be ensured more reliably, and in addition, the plate thickness T2 of the valve seat portion 3″ can be made thinner (T2 < T1).

In embodiment 3-2, a relatively small value is selected as the radius of curvature R1 'of the first curve Cu1', but specifically, the upper limit value of the radius of curvature R1 'of the first curve Cu1' is not more than the maximum separation radius r0×1/4, whereby the region of the fixed surface 2bf can be ensured. In embodiment 3-2, two curves (first curve Cu1' and second curve Cu 2) are connected to each other so as to form an arc angle between the lower end portion of the side guide portion 2bg and the end portion of the fixing surface 2bf, but the number of curves, the radius of curvature, the combination of curves, and the like are not limited thereto. For example, the arc angle may be formed by connecting one or more curves continuously and smoothly to at least one of the two sides of the first curve Cu 1'.

(form 4 of the first embodiment)

As shown in fig. 9 (b) and (c), in the form 4 of the first embodiment, the radius of curvature of the circular arc angle at the maximum separation radius position P2far of the side Fang Nianjie agent reservoirs 68, 68' is selected to be a relatively large value (here, the maximum separation radius R0 as the maximum value) in the range of 0.5T or more and the maximum separation radius R0 or less. The side Fang Nianjie agent reservoir is formed in two modes, namely, form 4-1 and form 4-2, depending on the shape of the agent reservoir. Further, in the form 4 of the first embodiment, the shape of the valve seat portion 3' "and the formation region of the pair of side guide portions 2bg are slightly different from those of the form 3 of the first embodiment, in addition to the shape of the side adhesive reservoir.

First, the valve seat portion 3 '"is formed integrally by press working from stainless steel or the like having a plate shape and a uniform plate thickness, and includes a flat plate portion 3 a'" having a rectangular shape and disposed in a horizontal direction (XY plane direction) and a pair of reinforcing portions 3b '"standing from both side edges (Y axis direction) of the flat plate portion 3 a'". The pair of side guides 2bg (see dot patterns in fig. 9) of the valve main bodies 2 ' ", 2 '" are formed below the inner peripheral wall 2b, and have vertical forming regions at positions facing the pair of reinforcing portions 3b ' ".

(form 4-1)

As shown in fig. 9 (a) and (b), the corner of the side adhesive reservoir 68 connecting the pair of side guide portions 2bg and the fixed surface 2bf in the direction orthogonal to the axis L becomes the maximum separation radius position P2far and becomes the starting point of stress concentration, and therefore, in order to alleviate the stress concentration, an arc angle formed by the first curve Cu1″ having the radius of curvature of the maximum separation radius R0 is formed at the maximum separation radius position P2 far. Here, T3 represents the plate thickness of the valve seat portion 3' ". Further, a second curve Cu2 "(the radius of curvature R2" may be any value) is continuously and smoothly connected to one side (positive side in the Y-axis direction) of the first curve Cu1 "via a connecting portion P2, and the second curve Cu2" is connected to the lower end portion of the side guide portion 2 bg. Further, the third curve Cu3 (the radius of curvature r3:0.5T3 or more and the maximum separation radius r0×1/4 or less) is continuously and smoothly connected to the other side (the negative side in the Y-axis direction) of the first curve Cu1″ via the connecting portion P3. The radius of curvature R3 of the third curve Cu3 is set smaller than the radius of curvature R1 "of the first curve Cu1" (R3 < R1 "). In fig. 9 (b), the radius of curvature R1 "of the first curve Cu1" is 13T3, the radius of curvature R2 "of the second curve Cu2" is 1.5T3, and the radius of curvature R3 of the third curve Cu3 is 1.0T3. Thus, the side Fang Nianjie agent reservoir 68 has a concave portion 2br formed by three curves (a first curve Cu1", a second curve Cu2", and a third curve Cu 3).

As described above, in the embodiment 4-1, the use of the side adhesive reservoir 68 having the circular arc angle formed by the three curves (the first curve Cu1", the second curve Cu2", and the third curve Cu 3) can provide the same effect as the embodiment 3-1, that is, can completely eliminate the existing first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) and the new problem of the side Fang Nianjie agent reservoir. In particular, by setting the radius of curvature R1 "of the first curve Cu1" to the maximum separation radius R0 as in the form 4-1 of the present embodiment, the maximum separation radius position P2far can be enlarged toward the region along the circumferential direction, that is, the region that becomes the starting point of stress concentration can be enlarged, and therefore the stress concentration can be dispersed more effectively. In addition, in the embodiment 4-1, the third curve Cu3 (having the smaller curvature radius R3 than the first curve Cu1 ") is continuously and smoothly connected to the other side of the first curve Cu1", so that the region of the fixed surface 2bf can be reliably ensured.

In the embodiment 4-1, three curves (the first curve Cu1", the second curve Cu2", and the third curve Cu 3) are connected to form an arc angle between the lower end portion of the side guide portion 2bg and the end portion of the fixing surface 2bf, but the number of curves, the radius of curvature, the combination of curves, and the like are not limited thereto. For example, the arc angle may be formed by connecting one or more curves continuously and smoothly to both sides of the first curve Cu1″.

(form 4-2)

As shown in fig. 9 (c), since the maximum separation radius position P2far serves as a starting point of stress concentration in the same manner as in the case of the embodiment 4-1, in order to alleviate the stress concentration, an arc angle formed by a first curve Cu1″ having a radius of curvature of the maximum separation radius R0 is formed at the maximum separation radius position P2 far. In addition, as in the case of the embodiment 4-1, the second curve Cu2 "is continuously and smoothly connected to one side of the first curve Cu1" via the connecting portion P2 (the radius of curvature R2 "may be any value), and the third curve Cu3 is continuously and smoothly connected to the other side of the first curve Cu1" via the connecting portion P3 (the radius of curvature R3:0.5T3 or more and the maximum separation radius r0×1/4 or less, and the radius of curvature R3 < the radius of curvature R1 "). In addition, a vertical wall Vp that defines the boundary of the side adhesive reservoir 68' is formed in a recessed manner at the end of the fixing surface 2 bf. The lower end of the vertical wall Vp and the other side of the third curve Cu3 are continuously and smoothly connected to the fourth curve Cu4 (radius of curvature R4:0.5T3 or less) via the connecting portion P5 and the connecting portion P4. In fig. 9 (b), the radius of curvature R1 "of the first curve Cu1" is 13T3, the radius of curvature R2 "of the second curve Cu2" is 1.5T3, the radius of curvature R3 of the third curve Cu3 is 1.0T3, and the radius of curvature R4 of the fourth curve Cu4 is 0.3T3. Thus, the side Fang Nianjie agent reservoir 68' has a concave portion 2br formed by four curves (first curve Cu1", second curve Cu2", third curve Cu3, and fourth curve Cu 4) at the arc angle.

As described above, in the embodiment 4-2, the use of the side adhesive reservoir 68' having the circular arc angle formed by the four curves (the first curve Cu1", the second curve Cu2", the third curve Cu3, and the fourth curve Cu 4) can provide the same effect as the embodiment 4-1, that is, can completely eliminate the existing first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion) and the new problems of the side Fang Nianjie agent reservoir. In addition, in the embodiment 4-2, as in the embodiment 4-1, by setting the radius of curvature R1 "of the first curve Cu1" to the maximum separation radius R0, the maximum separation radius position P2far can be enlarged to the region along the circumferential direction, that is, the region which becomes the starting point of stress concentration can be enlarged, and therefore stress concentration can be dispersed more effectively. In addition, in embodiment 4-2, the boundary of the side adhesive reservoir 68 'is divided by the vertical wall Vp, so that the width of the side adhesive reservoir 68' can be appropriately adjusted, and the area of the fixing surface 2bf can be ensured more reliably.

In the embodiment 4-2, four curves (the first curve Cu1", the second curve Cu2", the third curve Cu3, and the fourth curve Cu 4) are connected to form an arc angle between the lower end portion of the side guide portion 2bg and the lower end portion of the vertical wall Vp, but the number of curves, the radius of curvature, the combination of curves, and the like are not limited thereto. For example, the arc angle may be formed by connecting one or more curves continuously and smoothly to both sides of the first curve Cu1″.

As described above, in the embodiments 3 and 4, the corner portions of the side adhesive agent reservoirs 67, 67', 68, and 68' are formed with the arc angle extending in the direction of the axis L and having the circular arc cross-sectional shape, so that the stress concentration at the corner portions can be relaxed, and the occurrence of fracture of the valve body 2 can be suppressed, that is, the compressive strength of the valve body 2 can be improved. In addition, in the embodiment 3 and the embodiment 4, the stress concentration can be relaxed more reliably by setting the radius of curvature of the arc angle at the corner portions of the side adhesive agent reservoirs 67, 67', 68' to a predetermined range (0.5 times or more the plate thickness of the valve seat portion and not more than the maximum separation radius R0).

The circular arc angles in the embodiments 3 and 4 have at least a region recessed from the fixed surface 2bf so as not to interfere with the opposed portions of the valve seat portions 3', 3", 3'", but are not limited thereto. For example, as shown in fig. 7 (b), when the notch portion 3C2 is formed in the lower corner portion of the valve seat portion 3C, the circular arc angle may be formed so as to round the corner portion of the corner portion C2, and may be continuously and smoothly connected to the fixing surface 2bf and the side guide portion 2bg so as not to interfere with the valve seat portion 3C.

(second embodiment)

The sliding type switching valve according to the second embodiment will be described with reference to fig. 10 and 11. In the sliding type switching valve 100 according to the first embodiment, the adhesive reservoirs 61 to 66 are formed to avoid the adhesive Ad from oozing out on the sliding contact surface 33 of the valve seat portion 3, whereas in the sliding type switching valve according to the second embodiment, the adhesive escape spaces 71 and 72 are formed to avoid the adhesive Ad oozing out on the sliding contact surface 33 of the valve seat portion 3, and the sliding type switching valve 100 according to the first embodiment and the sliding type switching valve according to the second embodiment are different from each other in the above-described aspect. Further, other basic structures in the second embodiment are the same as those in the first embodiment. Here, the same structures are denoted by the same reference numerals, and repetitive description thereof will be omitted.

As shown in fig. 10 and 11, the valve body 4A includes a valve body 40A having a bowl portion 40 b. The bowl 40b includes: a protruding portion 40P protruding in the direction of the axis L and extending in a direction orthogonal to the axis L; and a pair of sliding contact portions 40S protruding in a direction orthogonal to the axis L and extending in the direction of the axis L. The pair of sliding contact portions 40S has a small gap with the pair of side guide portions 2bg so that the valve element 4A can slide smoothly with respect to the valve seat portion 3. Here, as shown in fig. 10 c, the protruding amount WP of the protruding portion 40P is set to be larger than the oozing width Wa1 of the adhesive Ad on the sliding contact surface 33 of the valve seat portion 3 (WP > Wa 1) in the axis L direction. Similarly, as shown in fig. 10 d, the protruding amount WS of the sliding contact portion 40S is set to be larger than the oozing width Wa2 of the adhesive Ad on the sliding contact surface 33 of the valve seat portion 3 (WS > Wa 2) in the direction orthogonal to the axis L. As shown in fig. 11 (b), a side step portion 4As1 and a side step portion 4As2 are formed between the protruding portion 40P and the opening edge portion 40a, and between the sliding contact portion 40S and the opening edge portion 40a, respectively. Here, the oozing widths Wa1, wa2 of the adhesive Ad on the sliding contact surface 33 of the valve seat portion 3 in the present embodiment are set to values obtained by adding a predetermined margin for safety based on values measured in advance through experiments.

< concerning adhesive retreat space)

The adhesive escape spaces 71 and 72 are constituted by one end side adhesive escape space 71 and a side adhesive escape space 72. Here, as shown in fig. 10 (c), the one-end-side adhesive escape space 71 is divided between the protruding portion 40P, the one-side stepped portion 4As1, the sliding contact surface 33 of the valve seat portion 3, and the one-end-side guide portion 2cg, and has a rectangular cross section. Similarly, as shown in fig. 10 (d), the side Fang Nianjie agent escape space 72 is divided among the sliding contact portion 40S, the side stepped portion 4As2, the sliding contact surface 33 of the valve seat portion 3, and the side guide portion 2bg, and has a rectangular cross section. In the present embodiment, the total volume of the one-end-side adhesive escape space 71 and the side adhesive escape space 72 is set to be equal to or larger than the application amount of the adhesive Ad used for fixing the valve seat portion 3 to the fixing surface 2 bf.

As a result, as shown in fig. 10 (c), when the valve body 4A moves in the movement direction M1, the protruding portion 40P contacts the one-end-side guide portion 2cg via the contact region Ca (see fig. 3 (c)). At this time, since the protrusion amount WP of the protrusion 40P, that is, the one-end-side adhesive escape space 71 is set to be larger than the oozing width Wa1 of the adhesive Ad on the sliding contact surface 33 of the valve seat portion 3 (WP > Wa 1), the adhesive Ad oozing out onto the sliding contact surface 33 can be reliably stored in the one-end-side adhesive escape space 71, and the opening edge portion 40a of the valve body 4A does not interfere with the adhesive Ad.

Similarly, as shown in fig. 10 (d), when the valve body 4A moves in the movement direction M2, the sliding contact portion 40S contacts the side guide portion 2bg via the contact region Ca. At this time, since the protruding amount WS of the sliding contact portion 40S, that is, the side Fang Nianjie adhesive escape space 72 is set to be larger than the oozing width Wa2 of the adhesive Ad on the sliding contact surface 33 of the valve seat portion 3 (WS > Wa 2), the adhesive Ad oozing out onto the sliding contact surface 33 can be reliably stored in the side adhesive escape space 72, and the opening edge portion 40a of the valve body 4A does not interfere with the adhesive Ad.

As described above, in the present embodiment, the one end guide portion 2cg, the side guide portion 2bg, and the adhesive fixing can be used as the fixing means of the valve seat portion 3 instead of the welding fixing, so that the first and second problems (problems caused by the positioning means of the valve seat portion and the fixing means of the valve seat portion) can be eliminated, and the new problem of the fixing means (adhesive fixing) of the valve seat portion can be eliminated by using the adhesive escape spaces 71 and 72, so that the adhesive Ad oozing from the adhesive surface 34 of the valve seat portion 3 to the sliding contact surface 33 can be reliably avoided by the valve element 4A.

As described above, in the present embodiment, the adhesive escape spaces 71 and 72 can completely eliminate the conventional first and second problems (problems caused by the positioning mechanism of the valve seat portion and the fixing mechanism of the valve seat portion).

The adhesive reservoirs 61 to 66 in the first embodiment and the adhesive relief spaces 71 and 72 in the second embodiment are provided, respectively, but the present invention is not limited to this, and by combining the adhesive reservoirs 61 to 66 in the first embodiment and the adhesive relief spaces 71 and 72 in the second embodiment, even when the adhesive Ad oozes out from the adhesive surface 34 of the valve seat 3 onto the sliding contact surface 33, the adhesive relief spaces 71 and 72 function as a fail-safe device regardless of whether the adhesive reservoirs 61 to 66 are provided or not, and therefore the opening edge 40a of the valve element 4A does not interfere with the adhesive Ad.

< others >

The sliding type switching valve 100 of the present embodiment is applicable not only to the refrigeration cycle system shown by way of example, but also to any fluid device and fluid circuit. The present invention is not limited to the above-described embodiments, and modifications described below, and can be appropriately changed and modified without departing from the technical spirit of the present invention.

Claims

1. A sliding type switching valve is provided with:

a hollow cylindrical valve body extending in an axial direction;

A valve body slidably provided in the valve body in an axial direction; and

a plate-shaped valve seat portion fixed to a fixed surface of the valve body, the valve body being in sliding contact with the valve body,

the above-mentioned sliding type switching valve is characterized in that,

the valve seat portion has a plurality of valve ports arranged in an axial direction, a sliding contact surface with which the valve body is in sliding contact, and an adhesive surface located on an opposite side of the sliding contact surface,

at least the other of one end side in the axial direction and a pair of sides in the direction orthogonal to the axial direction of the valve main body is provided with a guide portion which is erected from the fixed surface in the vertical direction and can be abutted against the valve seat portion,

the valve seat portion is positioned at the guide portion, and the adhesive surface is adhered and fixed to the fixing surface,

an adhesive reservoir is formed on at least one of the opposed surfaces of the guide portion and the valve seat portion so that the adhesive does not ooze from the adhesive surface toward the sliding contact surface.

2. The sliding type switching valve according to claim 1, wherein,

the total volume of the adhesive reservoir is equal to or greater than the amount of adhesive applied for fixing the valve seat to the fixing surface.

3. The sliding type switching valve according to claim 2, wherein,

in a direction orthogonal to the axis of the tube,

the adhesive reservoir formed on at least one of the opposing surfaces of the guide portion and the valve seat portion has a width larger than a maximum mounting gap between the guide portion and the valve seat portion, and an adhesive having a concave surface and being cured is disposed in the adhesive reservoir.

4. The sliding type switching valve according to claim 2, wherein,

in the direction of the axis of the shaft,

the adhesive reservoir formed on at least one of the opposing adhesive surfaces of the guide portion and the valve seat portion has a width larger than a mounting gap between the guide portion and the valve seat portion, and an adhesive having a concave surface and being cured is disposed in the adhesive reservoir.

5. The sliding type switching valve according to claim 3, wherein,

the guide part is arranged at one end side of the axial direction and at two sides of a pair of sides of the axial direction which are orthogonal to the axial direction,

an arc angle extending in the axial direction is provided at a corner of an adhesive reservoir connecting the fixing surface and the guide portions provided on both sides of the pair of sides.

6. The sliding type switching valve according to claim 5, wherein,

the radius of curvature of the circular arc angle at the position of the adhesive reservoir having the largest separation radius farthest from the axis of the valve main body is 0.5 times or more and not more than the largest separation radius of the valve seat portion.

7. The sliding type switching valve according to claim 6, wherein,

the radius of curvature of the arc angle is the maximum separation radius at a position having the maximum separation radius farthest from the axis.

8. The sliding type switching valve according to claim 6, wherein,

the circular arc angle has a region recessed at least with respect to the fixing surface.

9. A sliding type switching valve is provided with:

a hollow cylindrical valve body extending in an axial direction;

a valve body slidably provided in the valve body in an axial direction; and

the above-mentioned sliding type switching valve is characterized in that,

At least one of one end side in the axial direction and a pair of sides in a direction orthogonal to the axial direction of the valve main body is provided with a guide portion which is erected from the fixed surface in a vertical direction and can be abutted against the valve seat portion,

an adhesive escape space is formed in an outer peripheral surface of the valve body facing the guide portion so that the adhesive oozing out from the adhesive surface onto the sliding contact surface does not interfere with the valve body.

10. The sliding type switching valve according to claim 9, wherein,

in a direction orthogonal to the axis of the tube,

11. The sliding type switching valve according to claim 9, wherein,

in the direction of the axis of the shaft,

the adhesive escape space formed in the outer peripheral surface of the valve body facing the guide portion is formed by a protrusion portion that protrudes from the valve body and abuts against the guide portion, the protrusion portion being larger than the adhesive oozing width on the sliding contact surface.