CN116412266A

CN116412266A - Electromagnetic switching valve

Info

Publication number: CN116412266A
Application number: CN202111654912.7A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2023-07-11

Abstract

The utility model provides an electromagnetic switch valve, its characterized in that includes the valve body, the valve body includes valve body main part, valve body main part includes first platy portion, first curved surface portion, second curved surface portion, first curved surface portion is located one side of first platy portion, second curved surface portion is located the opposite side of second platy portion, first curved surface portion with second curved surface portion sets up relatively, at least one cross section of valve body main part, first curved surface portion with the distance of second curved surface portion is greater than the width of first platy portion. The application provides an electromagnetic switch valve has first curved surface portion and second curved surface portion, when the valve pocket of electromagnetic switch valve is filled with high-pressure refrigerant, the effort of refrigerant can be along the curved surface dispersion of first curved surface portion and second curved surface portion to the compressive strength of valve body has been improved.

Description

Electromagnetic switching valve

Technical Field

The invention relates to the field of refrigeration control, in particular to an electromagnetic switching valve.

Background

Electromagnetic switching valves are used in refrigeration systems, typically for switching refrigerant flow paths to change the flow direction of a refrigerant. Such as an electromagnetic four-way valve, an electromagnetic three-way valve, etc. An electromagnetic four-way valve will be described below as an example. Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a typical electromagnetic four-way valve used in a refrigeration system according to the background art, and fig. 2 is a schematic connecting diagram of a main valve and a pilot valve of the electromagnetic four-way valve according to the background art.

As shown, a conventional solenoid four-way valve is generally useful in a refrigeration system, such as an air conditioning system, and includes a main valve 10 'and a pilot valve 20'; the main valve 10 'comprises a valve body 11'. The valve body 11' is generally cylindrical, a D interface is formed on the peripheral wall of the valve body for connecting an exhaust pipe D, a valve seat 13' is fixedly connected to one side peripheral wall opposite to the D interface, and 3 holes are formed in the valve seat 13' for fixedly connecting the connecting pipe E, the air suction pipe S and the connecting pipe C. Since the cross section of the valve body 11' is circular, the valve seat 13' is provided with an arc surface matched with the inner wall of the main valve body, namely, the longitudinal section of the valve seat 13' is approximately D-shaped, and the valve seat are fixed by welding.

The valve body 11' is connected with an exhaust pipe D (connected with a high-pressure area) connected with an exhaust port of the compressor, an air suction pipe S (connected with a low-pressure area) connected with an air suction port of the compressor, a connecting pipe E connected with the indoor heat exchanger 30', and a connecting pipe C connected with the outdoor heat exchanger 40 '; the two ends of the valve body 11 'are provided with end covers 12', the inside is fixedly provided with a valve seat 13', a sliding block 15' driven by a connecting rod 14 'and a piston 16' are also arranged, the valve seat 13 'contacts and supports the sliding block 15' to form a pair of kinematic pairs, and the piston 16 'and the valve body 11' form a pair of kinematic pairs.

The small valve body of the pilot valve 20' is fixedly provided with a capillary tube D connected with the exhaust pipe D of the main valve 10', namely the inner cavity of the pilot valve 20' is correspondingly communicated with the high-pressure area of the main valve; the small valve seat of the pilot valve 20' is provided with three valve ports, and a capillary e, a capillary S and a capillary c which are respectively and fixedly connected with the left end cover of the main valve 10', the air suction pipe S and the right end cover of the main valve 10' are respectively arranged left to right; a sleeve is fixed at the right end of the small valve body of the pilot valve 20', and an electromagnetic coil 50' is arranged at the outer side of the sleeve.

In a working state, when the refrigerating system needs refrigeration, the electromagnetic coil 50 'is not electrified, the core iron in the inner cavity of the pilot valve 20' drives the sliding bowl to be positioned at the left side under the action of the restoring spring force, so that the capillary E is communicated with the capillary S, the capillary C is communicated with the capillary D, the left cavity of the main valve 10 'is a low-pressure area, the right cavity is a high-pressure area, the pressure difference force formed between the left cavity and the right cavity of the main valve 10' pushes the sliding block 15 'and the piston 16' to the left side, the connecting pipe E is communicated with the air suction pipe S, the air discharge pipe D is communicated with the connecting pipe C, and at the moment, the circulation path of the refrigerant in the refrigerating system is as follows: compressor exhaust port- & gt exhaust pipe D- & gt valve cavity of valve body 11- & gt connection pipe C- & gt outdoor heat exchanger 40 '& gt throttle element 60' & gt indoor heat exchanger 30 '& gt connection pipe E- & gt inner cavity of slide block 15' & gt air suction pipe S- & gt compressor air suction port, and refrigerating system is in refrigeration working state;

when the refrigerating system needs to be heated, the electromagnetic coil 50 'is electrified, the core iron in the inner cavity of the pilot valve 20' overcomes the acting force of the return spring to drive the sliding bowl to move right, so that the capillary tube C is communicated with the capillary tube S, the capillary tube E is communicated with the capillary tube D, the left cavity of the main valve 10 'is a high-pressure area, the right cavity is a low-pressure area, a pressure difference is formed between the left cavity and the right cavity of the main valve 10', the sliding block 15 'and the piston 16' are pushed to the right side, the connecting pipe C is communicated with the air suction pipe S, the air discharge pipe D is communicated with the connecting pipe E, and at the moment, the circulation path of a refrigerant in the refrigerating system is as follows: compressor exhaust port- & gt exhaust pipe D- & gt valve cavity of valve body 11- & gt take over E- & gt indoor heat exchanger 30 '& gt throttling element 60' & gt outdoor heat exchanger 40 '& gt take over C- & gt inner cavity of slide block 15' & gt air suction pipe S- & gt compressor air suction port, and the refrigerating system is in a heating working state.

As described above, the main valve 10' is reversed by the combined action of the pilot valve 20' and the solenoid 50', and the like, so that the flow direction of the refrigerant is switched, and the switching between the heating operation state and the cooling operation state of the refrigeration system is realized.

Disclosure of Invention

An object of the present invention is to provide an electromagnetic switching valve in which a valve body has high compressive strength. For this purpose, at least one embodiment of the invention employs the following technical solutions:

the utility model provides an electromagnetic switch valve, its characterized in that includes the valve body, the valve body includes valve body main part, valve body main part includes first platy portion, first curved surface portion, second curved surface portion, first curved surface portion is located one side of first platy portion, second curved surface portion is located the opposite side of second platy portion, first curved surface portion with second curved surface portion sets up relatively, at least one cross section of valve body main part, first curved surface portion with the distance of second curved surface portion is greater than the width of first platy portion.

The electromagnetic switching valve adopted in the embodiment is provided with the first curved surface part and the second curved surface part, and when the valve cavity of the electromagnetic switching valve is filled with the high-pressure refrigerant, the acting force of the refrigerant can be dispersed along the curved surfaces of the first curved surface part and the second curved surface part, so that the compressive strength of the valve body is improved.

Drawings

FIG. 1 is a schematic diagram of a structure of an electromagnetic four-way valve for a refrigeration system according to the background art;

FIG. 2 is a schematic cross-sectional view of an electromagnetic switching valve according to a first embodiment of the present invention;

fig. 3 is a perspective view of an electromagnetic switching valve according to a first embodiment of the present invention;

FIG. 4 is a schematic view of the structure of the valve body according to the first embodiment of the present invention;

FIG. 5 is a schematic longitudinal cross-sectional view of a valve body provided in accordance with a first embodiment of the present invention;

FIG. 6 is a schematic view of another construction of a valve body portion according to a first embodiment of the present invention;

FIG. 7 is a schematic view of the structure of a valve body main body portion according to a second embodiment of the present invention;

FIG. 8 is a cross-sectional view of a valve body portion of a second embodiment of the present invention;

FIG. 9 is a schematic view of a manufacturing flow of a valve body according to a second embodiment of the present invention;

FIG. 10 is a schematic view of the structure of a valve body according to a third embodiment of the present application;

FIG. 11 is a schematic view of a valve body structure according to a fourth embodiment of the present application;

FIG. 12 is a cross-sectional view of a fourth embodiment of the present application;

fig. 13 is another structural schematic diagram of the fourth embodiment of the present application.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the following detailed description is provided with reference to the accompanying drawings and the specific embodiments.

First embodiment

Referring to fig. 2-4, fig. 2 is a schematic cross-sectional view of an electromagnetic switching valve according to a first embodiment of the present invention; fig. 3 is a perspective view of an electromagnetic switching valve according to a first embodiment of the present invention;

fig. 4 is a schematic view of the structure of the valve body according to the first embodiment of the present invention.

The electromagnetic switching valve of the embodiment is a four-way valve and is used for switching the flowing direction of a refrigerant in a refrigerating system. As shown in fig. 3, the electromagnetic switching valve includes a main valve 100 and a pilot valve 200, wherein the main valve 100 includes a valve body 1, and the valve body 1 may be machined from a metallic material such as a stainless steel material.

In the present embodiment, the valve body 1 includes a valve body main body portion 11, and first and

second sleeve portions

12, 13. The valve body 11 is made of stainless steel. The two ends of the valve body main body 11 are respectively connected with a first sleeve part 12 and a second sleeve part 13 which are in a cylinder shape directly or indirectly, the first sleeve part 12 and the second sleeve part 13 are in an open cylinder shape with one closed end, the first sleeve part 12 is fixedly connected with one end part of the valve body main body 11, and the second sleeve part 13 is fixedly connected with the other end part of the valve body main body 11. The area surrounded by the longitudinal section of the first sleeve portion 12 is smaller than the area surrounded by the longitudinal section of the valve body portion 11, and the area surrounded by the longitudinal section of the second sleeve portion 13 is smaller than the area surrounded by the longitudinal section of the valve body portion 11. The end of the first sleeve portion 12 connected to the valve body main portion 11 may be formed into a shape corresponding to the end of the valve body main portion 11 by punching or the like, or the first sleeve portion 12 may be fixedly connected to the valve body main portion 11 by a single transition member. Similarly, the second sleeve portion 13 may be connected to the other end of the valve body main body portion 11 in the same manner as the first sleeve portion 12.

In this way, the valve body 11, the first sleeve portion 12 and the second sleeve portion 13 substantially define a valve chamber, and the refrigerant in the valve chamber can flow through the first connection pipe 31, the second connection pipe 32, the third connection pipe 33 and the fourth connection pipe 34. In particular, during connection, the first sleeve portion 12 and the second sleeve portion 13 need only be ensured to be coaxial, no special limitation needs to be made between the first sleeve portion 12 or the second sleeve portion 13 and the valve body main portion 11, and only requirements are satisfied that after a piston connecting rod assembly and a sliding block are assembled, the sliding block can be ensured to slide on the valve body main portion or a valve seat, and meanwhile, the piston component can move in the inner cavities of the first sleeve portion and the second sleeve portion.

Inside the valve body 1, a slider 6, a piston assembly and a connecting rod 5 are provided, wherein the piston assembly comprises a first piston 41 and a second piston 42. The first piston 41 is fixedly connected with one end of the connecting rod 5, and the second piston 42 is fixedly connected with the other end of the connecting rod 5. The connecting rod 5 is provided with a through hole and is clamped and limited with the sliding block 6, so that the sliding block 6 can be driven to move together when the connecting rod 5 moves in the left-right direction. In the position shown in fig. 2, the inner cavity of the slide 6 connects the space in the third connecting pipe 33 and the space in the fourth connecting pipe 34, and when the slide 6 moves leftwards to the preset position, the inner cavity of the slide 6 connects the space in the second connecting pipe 32 and the space in the third connecting pipe 33. The first piston 41 can slide along the inner wall of the first sleeve portion 12, the second piston 42 can slide along the inner wall of the second sleeve portion 13, so that the piston assembly divides the valve cavity into a first valve cavity 411, a second valve cavity 412 and a third valve cavity 413, and when pressure difference is generated between the valve cavities, the pressure difference force can push the piston assembly, the connecting rod and the sliding block to displace, so that the inner space of the second connecting pipe 32 and the inner space of the third connecting pipe 33 are communicated, or the inner space of the third connecting pipe 33 and the inner space of the fourth connecting pipe 34 are communicated. In order to determine the stroke of the piston assembly, the connecting rod, and the slider moving leftward and rightward, it is necessary to provide a limit structure for positioning the piston assembly, the connecting rod, and the slider moving leftward and rightward, and in this embodiment, a limit portion, specifically, a step portion may be provided on the outer peripheral wall of the first sleeve portion 12, and when the first piston 41 moves leftward, the limit structure may abut against the step portion to realize positioning. Similarly, a stopper may be provided in the second sleeve portion 13 to position the second piston 42.

Referring to fig. 4, fig. 4 is a schematic view of a main body of a valve body according to a first embodiment of the present invention. The valve body 11 may be integrally formed of a stainless steel plate, and includes a first plate 111, and a first curved surface 112 and a second curved surface 113 located on both sides of the first plate 111. The first plate-shaped portion 111 is substantially flat, and three second interface portions 1122 penetrating therethrough are provided for fixedly connecting the second connection pipe 32, the third connection pipe 33, and the fourth connection pipe 34, respectively. In order to facilitate connection between the second connector 1122 and the adapter tube, a flange structure may be disposed at the second connector 1122, that is, protruding towards the outer side of the valve body main body, so that the flange portion may have a sufficient length to be matched with the adapter tube, which is beneficial to ensuring welding quality.

The first curved surface portion 112 and the second curved surface portion 113 are located on both sides of the first plate-like portion 111, and are connected as a unitary structure by the second plate-like portion 114. The first curved surface portion 112 and the second curved surface portion 113 each have a relatively convex structure. Specifically, the present embodiment may be formed by cutting out one section of a stainless steel section with a square cross section, for example, by punching two opposite faces of a square valve body into a first curved face portion 112 and a second curved face portion 113 protruding toward the outside. Thus, the valve body portion may be substantially divided into four faces. The valve body main body 11 is provided with a first interface portion 1121 for fixedly connecting with the first adapter tube 31, specifically, the second plate portion 114 is provided with the first interface portion 1121, and a flange protruding toward the outer side of the valve body main body is provided to facilitate the fixation with the first adapter tube 31. The first interface portion 1121 is provided opposite to the 3 second interface portions 1122. In this embodiment, the number of the second ports 1122 is 3, and in other applications, such as a three-way valve, only 2 second ports may be provided. The valve seat 2 is fixedly connected to the inside of the valve body main body 11 on the inner side of the first plate-like portion 111, and the valve seat 2 and the valve body main body 11 may be fixedly connected to each other by welding or by bonding.

Referring to fig. 5, fig. 5 is a schematic longitudinal cross-sectional view of a valve body according to a first embodiment of the present invention. The second plate-like portion 114 is disposed opposite to the first plate-like portion 111, the first curved surface portion 112 and the second plate-like portion 113 are located on both sides of the first plate-like portion, respectively, the width of the planar portion defining the interior of the first plate-like portion 111 is the width a of the first plate-like portion 111, the distance between the first curved surface portion 112 and the second curved surface portion 113 is defined as B1, and it is apparent that since the first curved surface portion 112 protrudes toward the exterior of the valve body portion, the second curved surface portion 113 protrudes toward the exterior of the valve body portion, and the distance B between the two in the horizontal direction differs depending on the height. In at least one cross section of the valve body main body portion, such as an X-X cross section in fig. 5, a distance B1 of the first curved surface portion 112 from the second curved surface portion 113 is greater than a width a of the first plate-like portion.

The specific curved surface shapes of the first curved surface portion and the second curved surface portion are not limited, and of course, as a specific embodiment, the surface shapes of the first curved surface portion 112 and the second curved surface portion 113 may be set to be a part of the surface shape of a cylinder, and in the longitudinal section shown in fig. 5, the contour lines of the first curved surface portion 112 and the second curved surface portion 113 correspond to circular arcs, that is, form a part of a circle. In the actual processing process, the first curved surface portion or the second curved surface portion may be set to be a smoothly transitional arc surface instead of a standard arc surface. As shown in fig. 6, fig. 6 is another structural schematic diagram of the valve body main body according to the first embodiment of the present invention. In this structure, the cross-sectional profiles of the first curved surface portion 112 and the second curved surface portion 113 are not all arc-shaped, but some of them are arc-shaped, and the rest may be connected by arc lines or straight lines with different radians, and a smooth transition of curves may be adopted at the transition point.

When the electromagnetic switching valve is in a working state, the cavity of the main body part of the valve body is filled with high-temperature and high-pressure refrigerants, in a system with unchanged pressure, the larger the stressed area of the valve body in the same direction is, the larger the stressed force F is, and when the stressed surface is a plane, deformation is likely to occur, and once the deformation occurs, the welding part of the valve body is likely to be affected, so that the strength of a welding seam is affected. In the present embodiment, the first plate-shaped portion 111 is substantially flat, but is provided with three second interface portions 1122, and the second plate-shaped portion 114 is substantially flat, but is provided with a first interface portion 1121, and the first and second interface portions objectively play a role in reinforcing the plate-shaped portion. The arrangement of the first curved surface portion and the second curved surface portion makes the inner cavity of the valve body main body portion 11 present a form of protruding outwards at two sides of the direction shown in fig. 5, when the valve cavity is filled with high-pressure refrigerant, the acting force of the refrigerant can be dispersed along the curved surface, as shown by arrows in fig. 5 or 6, and the acting force can not be concentrated on the first curved surface portion and the second curved surface portion, so that the compressive strength of the valve body main body portion 11 is improved.

In the present embodiment, a maximum distance B exists between the first curved surface portion 112 and the second curved surface portion 113, as shown in fig. 5 and 6. When all or part of the contour lines of the first curved surface portion 112 and the second curved surface portion 113 are two sections of circular arcs which are symmetrical, the center distance in the height direction is the maximum distance B, when the value of B is too small, the curved surface portion is closer to the plane, the effect of the dispersion pressure is not obvious enough, and when the value of B is too large, on one hand, the increase of the material and the increase of the cost are brought, and on the other hand, the further increase of the effect of the dispersion pressure is not obvious, and meanwhile, the subsequent connection with the first sleeve portion 12 and the second sleeve portion 13 is also not facilitated. In the present embodiment, the maximum distance B between the first curved surface portion 112 and the second curved surface portion 113 and the width a of the first plate-shaped portion satisfy the relationship: b is more than or equal to 1.15A and less than or equal to 1.2A. In the range, the two components can achieve better balance, which is beneficial to processing and can achieve better pressure-resistant effect.

In the present embodiment, the height C of the valve body main body 11 may be defined accordingly, and the maximum distance B between the first curved surface portion 112 and the second curved surface portion 113 and the height C of the first curved surface portion 112 may be set to satisfy the relation: b is more than or equal to 1.0 and less than or equal to 1.3C. Meanwhile, the height C of the first curved surface portion 112 may be set closer to the width a of the first plate-like portion. I.e. the values of B and C are set substantially close or B is slightly larger than C. The values of C and a are substantially close. With this structure, the overall structure of the valve body 11 is relatively uniform, and the high-pressure refrigerant pressure acts relatively uniformly on the surfaces inside the valve body, thereby further improving the compressive strength of the valve body.

It should be noted that, in the description of the above embodiment, the second plate-shaped portion 114 is also in a flat plate shape, and those skilled in the art should understand that the core of this embodiment is the arrangement of the first curved surface portion and the second curved surface portion, and the second plate-shaped portion 114 is not necessarily limited to a flat plate structure, but may be a structure with a curved surface.

When the valve body 11 is manufactured, a stainless steel material having a square cross section may be used, one of the sections may be cut, and then all or part of both side surfaces may be processed by punching or drawing to form a first curved surface portion and a second curved surface portion, while both upper and lower surfaces are maintained in a flat plate state, and then the first joint 1121 is processed in the first plate-like portion and the plurality of second joint 1122 are processed in the first plate-like portion. The processing method is simple to manufacture and low in cost.

In the embodiment shown in fig. 5, the contour line of the longitudinal section of the first curved surface portion is an arc segment, and the contour line of the longitudinal section of the second curved surface portion is also an arc segment, wherein one end of the first curved surface portion is smoothly transited to the second plate-shaped portion 114, and the other end is smoothly transited to the first plate-shaped portion 111; one end of the second curved surface portion smoothly transitions with the second plate-like portion 114, and the other end smoothly transitions with the first plate-like portion 111. At this time, the center of the arc segment is located at the center of the valve body in the height direction. At this time, the first curved surface portion 112 is symmetrically disposed with respect to the valve body height direction, so that the pressure of the high-pressure refrigerant is uniformly applied to the inner surface of the first curved surface portion, thereby further improving the compressive strength of the valve body main body. The second curved surface portion may be provided with reference to the structure of the first curved surface portion, and may be provided to be bilaterally symmetrical to the first curved surface portion in the view of fig. 5.

Second embodiment

A second embodiment of the present invention will be described in detail with reference to fig. 7 and 8.

In order to facilitate description of differences between the present embodiment and the first embodiment, in the present embodiment, components having the same structure and function as those of the first embodiment are described with the same reference numerals.

Referring to fig. 7 and 8, fig. 7 is a schematic structural view of a valve body according to a second embodiment of the present invention, and fig. 8 is a cross-sectional view of the valve body according to the second embodiment of the present invention.

In the present embodiment, the electromagnetic switching valve includes the main valve 100 and the pilot valve 200, the main valve 100 includes the valve body 1, and the valve body 1 includes the valve body main body portion K11 and the first and

second sleeve portions

12, 13. Wherein the valve body main body K11 is made of stainless steel plate. The connection manner of the valve body main portion K11 and the first sleeve portion 12 and the second sleeve portion 13 may refer to the description of the first embodiment, and will not be repeated herein.

Inside the valve body 1, a slider 6, a piston assembly and a connecting rod 5 are provided, wherein the piston assembly comprises a first piston 41 and a second piston 42. The first piston 41 is fixedly connected with one end of the connecting rod 5, and the second piston 42 is fixedly connected with the other end of the connecting rod 5. The connecting rod 5 is provided with a through hole and is clamped and limited with the sliding block 6, so that the sliding block 6 can be driven to move together when the connecting rod 5 moves in the left-right direction. The fixed connection of the slider, the piston assembly and the connecting rod can be understood with reference to the first embodiment.

The valve body main body K11 includes a first plate-shaped portion K111 and a surrounding portion, that is, the first plate-shaped portion K111 is substantially in a flat plate-shaped structure, and the surrounding portion and the first plate-shaped portion are connected into an integral structure and enclose a hollow cavity. In this embodiment, the valve body K11 is formed by welding a stainless steel sheet after being folded. The surrounding portion includes a first curved surface portion K112 and a second curved surface portion K113. That is, the valve body portion K11 includes a first plate-like portion K111, and a first curved surface portion K112 and a second curved surface portion K113 located on both sides of the first plate-like portion K111. In this embodiment, the valve body K11 further includes a second plate-like portion K114. The first plate-shaped portion K111 is substantially flat, and three second connector portions K1122 penetrating therethrough are provided for fixedly connecting the second connection pipe 32, the third connection pipe 33, and the fourth connection pipe 34, respectively. Similar to the first embodiment, in order to facilitate connection between the second interface portion and the three connection pipes, a flange structure may be disposed at the second interface portion, that is, protruding towards the outer side of the valve body main body portion K11, so as to increase the mating length of the interface portion and the connection pipes, which is beneficial to ensuring welding quality. The first plate-shaped portion K111 is provided with a first through interface portion K1111, and similarly, the first interface portion may also be provided with a flange structure, so as to facilitate the cooperation and the welding fixation with the first connecting tube. The first curved surface portion K112 and the second curved surface portion K113 are located on both sides of the first plate-like portion K111, and are connected as a unitary structure by the second plate-like portion 114.

Referring to fig. 8, fig. 8 is a cross-sectional view of a valve body according to a second embodiment of the present invention. Similar to the first embodiment, the width of the planar portion defining the inside of the first plate-like portion K111 is the width a of the first plate-like portion K111, the distance between the first curved surface portion K112 and the second curved surface portion K113 is B1, and it is apparent that since the first curved surface portion K112 protrudes toward the outside of the valve body main body portion, the second curved surface portion K113 protrudes toward the outside of the valve body main body portion, and the distance B therebetween differs in terms of level depending on the height. In at least one cross section of the valve body main body portion, such as an X-X cross section in fig. 5, a distance B1 between the first curved surface portion K112 and the second curved surface portion K113 is greater than a width a of the first plate-like portion. It should be noted that, in the first embodiment, the shapes and the dimensional relationships between the first curved surface portion, the second curved surface portion, the first plate-shaped portion, and the second plate-shaped portion are applicable to the second embodiment without conflict with the second embodiment, and are not described in detail herein. Also, in the above description of the embodiment, the second plate-like portion K114 is also flat, and it should be understood by those skilled in the art that the core of this embodiment is the arrangement of the first curved surface portion and the second curved surface portion, and the second plate-like portion K114 is not necessarily limited to a flat plate structure, but may be a structure with curved surfaces.

Unlike the first embodiment, in the present embodiment, the valve body main body portion K11 is formed by welding the sheet material end to end after being folded, and the welded portions are located at the surrounding portions on both sides of the first plate-like portion and at the side portions of the first plate-like portion. The side portion as referred to herein means a portion of the weld bead located at the surrounding portion on both sides of the first plate-like portion, that is, at neither the first plate-like portion nor the second plate-like portion opposite to the first plate-like portion. As shown in fig. 7, the first curved surface portion K112 has a welded portion K1121, and a weld is formed at the welded portion. I.e. the weld of the sheet material is located at the first curved surface portion K112. When the surrounding portion is not curved, the welding portion K1121 is located at a side portion of the first plate-like portion. In the background art shown in fig. 1, the whole valve body is cylindrical, the piston part slides on the inner wall of the valve body, and the piston bowl is prevented from being scratched due to the requirement of the sealing performance between the piston part and the valve body, so that the smoothness of the inner wall of the valve body is required to be high. If the main valve body in the background technology adopts a welded pipe, the welded seam needs to be leveled, and the smoothness after leveling does not influence the sliding fit of the piston. The welded pipe as described in the present specification is a round pipe obtained by welding a plate-shaped rolled sheet, and has a weld extending in the axial direction on the surface thereof. In the present application, the main valve body is formed by welding a main valve body portion, a first sleeve portion, and a second sleeve portion. The piston component slides in the inner cavities of the first sleeve part and the second sleeve part and cannot generate a matching relation with the valve body part, so that the inner wall of the valve body part has no requirements for smoothness, the possibility is provided for manufacturing the valve body part by adopting a welding pipe, and the process cost is reduced.

In theory, since the valve body structure of the present application does not require an internal finish, the weld can be located anywhere without affecting use. However, if the welded portion is located at the first plate-like portion K111 or at the rounded transition position of the first plate-like portion and the first curved surface portion K112 or at the rounded transition position of the first plate-like portion and the second curved surface portion K113 or at the position of the second plate-like portion K111 as indicated by the arrow in fig. 8. The valve seat and the connecting pipe are required to be welded with the valve body main body part, and the welding mode is usually a furnace welding mode, namely, the connecting pipe and the valve seat are pre-positioned with the valve body main body part in a tight fit or spot welding mode, and the welding flux is placed in a furnace and melted at high temperature so as to achieve the welding purpose. If the welding portion K1121 of the valve body is located at these positions, there is a possibility that solder may flow along the welding portion K1121 to both side end surfaces of the valve body during furnace welding, thereby affecting the subsequent welding operation between the valve body and the first and second sleeve portions.

Further, as shown in fig. 8, the welding portion is located on a curved surface where one of the two curved surface portions is located, and in this embodiment, the welding portion K1121 is located on the first curved surface portion K112, but may be located on the second curved surface portion K113. The arrangement mode of the welding part ensures that the welding part avoids the position of the welding flux of the furnace welding, thereby being beneficial to reducing the influence on the flow of the welding flux of the furnace welding. Meanwhile, the welding portion K1121 is located at the first curved surface portion K112 or the second curved surface portion K113, and after welding at this position, the welding seam is generally protruded, and the material thickness at this position is also thicker than that at other positions, that is, the thickness of the welding portion is greater than that of the first plate-shaped portion. Because the valve body can be communicated with high-pressure fluid during operation, pressure can be generated on the valve body, and the welding seam part is relatively thick, the reinforcing rib can be used, and therefore the compressive strength of the valve body can be improved.

Next, a method for manufacturing the valve body according to the present embodiment will be described in detail with reference to fig. 9.

The main body part of the valve body mainly adopts the following manufacturing method:

step one, rolling the prefabricated plate into a cylinder, and connecting the plates end to end.

Specifically, a prefabricated stainless steel plate S1 is selected, the stainless steel plate S1 is rolled into a cylinder shape, and the plates S1 are connected end to end.

And secondly, welding the tubular plates connected end to form a tubular part S2. And a welded portion K1121 is formed at the welded portion, the welded portion K1121 extending along the axial direction of the tubular member S2.

And thirdly, shaping the tubular component to form a first plate-shaped part, a first curved surface part, a second curved surface part and a second plate-shaped part on the tubular component, and forming a valve body main body part component S3.

In this step, the cylindrical tubular member is shaped into a special tube, that is, a valve body member S3. Because the material has stresses after being rolled into a round tube with a strip, the machining stresses can be removed by annealing prior to shaping.

And fourthly, processing more than two second interface parts on the first plate-shaped part.

Specifically, the first plate-like portion K111 is punched in the valve body main body member S3 to form two or more second punched portions K1122', and then the second punched portions K1122' are turned over to form two or more second joint portions K1122.

And fifthly, machining a first interface part on the second plate-shaped part.

Specifically, the second plate-like portion is punched on the valve body main body member S3 to form a first punched portion K1111', and then the first punched portion K1111' is burred to form a first joint portion K1111.

The order of the fourth step and the fifth step can be replaced.

In addition, when the above-described step three is not required to provide a curved surface portion, for example, the tubular member may be punched to form the first plate-like portion, the second plate-like portion, the third plate-like portion, and the fourth plate-like portion, to form the valve body main body member, and the valve body main body member may have a rectangular cross section, that is, to form the valve body main body structure of the third embodiment described below.

Third embodiment

As shown in fig. 10, fig. 10 is a schematic view of the structure of a valve body according to a third embodiment of the present application. It should be noted that, the emphasis of the second embodiment is that the valve body main body is formed by rolling a plate and then welding, and the welding seam is disposed on the first curved surface portion or the second curved surface portion located at two sides of the first plate portion, so as to avoid the influence of the welding seam on the solder flow during the furnace welding. Therefore, in the second embodiment, instead of providing the first curved surface portion or the second curved surface portion, a longitudinal cross-sectional shape of the valve body main body portion, which is a flat surface portion, may be provided, and the weld seam may be located on a side portion of the first plate-like portion, which is the third embodiment of the present application. In the present embodiment, the surrounding portion includes a third plate-like portion K115 and a fourth plate-like portion K116, wherein the third plate-like portion K115 is located at one side of the first plate-like portion K111, the fourth plate-like portion K116 is located at the other side of the first plate-like portion K111, the third plate-like portion K115 is disposed opposite to the fourth plate-like portion K116, and the welding portion K1161 is located at the third plate-like portion K115, however, the welding portion may be disposed at the third plate-like portion K116. It will be appreciated by those skilled in the art that the weld of this construction also does not have an effect on the solder flow of the furnace weld. The manufacturing method of the present embodiment can refer to the manufacturing method of the valve body main body portion of the second embodiment described above.

Fourth embodiment

A fourth embodiment of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 11, 12 and 13, fig. 11 is a schematic view of a valve body according to a fourth embodiment of the present application, fig. 12 is a cross-sectional view of the fourth embodiment of the present application, and fig. 13 is another schematic view of the fourth embodiment of the present application.

The present embodiment aims to provide a new solution to the valve body structure of an electromagnetic switching valve, which can produce new technical effects. The present embodiment is an optimization of the electromagnetic switching valve structure described in the first embodiment, and therefore the same reference numerals are used for the components having the same structure and function as those of the first embodiment.

The electromagnetic switching valve includes a main valve 100 and a pilot valve 200, wherein the main valve 100 includes a valve body 1, and the valve body 1 includes a valve body main body portion 11 and first and

second sleeve portions

12, 13. The valve body 11 is made of stainless steel.

The two ends of the valve body main body 11 are respectively connected with a first sleeve part 12 and a second sleeve part 13 which are in a cylinder shape directly or indirectly, the first sleeve part 12 and the second sleeve part 13 are in an open cylinder shape with one closed end, the first sleeve part 12 is fixedly connected with one end part of the valve body main body 11, and the second sleeve part 13 is fixedly connected with the other end part of the valve body main body 11. The area surrounded by the longitudinal section of the first sleeve portion 12 is smaller than the area surrounded by the longitudinal section of the valve body portion 11, and the area surrounded by the longitudinal section of the second sleeve portion 13 is smaller than the area surrounded by the longitudinal section of the valve body portion 11. The end of the first sleeve portion 12 connected to the valve body main portion 11 may be formed into a shape corresponding to the end of the valve body main portion 11 by punching or the like, or the first sleeve portion 12 may be fixedly connected to the valve body main portion 11 by a single transition member. Similarly, the second sleeve portion 13 may be connected to the other end of the valve body main body portion 11 in the same manner as the first sleeve portion 12. The first sleeve part 12 comprises a sliding fit 121 for providing a sliding channel for the piston member. Likewise, the second sleeve part 13 may also be provided with a sliding fit 131 providing a sliding channel for the piston member. The valve seat 2 is fixedly connected to the inside of the valve body main body 11 on the inner side of the first plate-like portion 111, and the valve seat 2 and the valve body main body 11 may be fixedly connected to each other by welding or by bonding. The present embodiment is mainly optimized for the relevant dimensional relationships of the valve body main body portion, the first sleeve portion, and the second sleeve portion, and the piston assembly, the connecting rod, the slider, and other components can refer to the description of the relevant components in the first embodiment, which is not repeated herein.

The valve body main body 11 includes a first plate-like portion 111 and a surrounding portion, and the first plate-like portion 111 has a substantially plate-like structure and forms a tubular-like structure together with the surrounding portion. In the present embodiment, as shown in fig. 12, the surrounding portion includes a first curved surface portion 112 and a second curved surface portion 113, wherein the first curved surface portion 112 is located at one side of the first plate-like portion 111, and the second curved surface portion 113 is located at the other side of the first plate-like portion 111. In at least one cross section of the valve body main body portion 11, the distance between the first curved surface portion 112 and the second curved surface portion 113 is greater than the width of the first plate-like portion 111. That is, the first curved surface portion and the second curved surface portion are relatively convex. A second plate-like portion 114 is also provided opposite the first plate-like portion 111. Of course, the valve body 11 may be configured such that the first curved surface portion and the second curved surface portion are not provided, as shown in fig. 13, and the surrounding portion includes the second plate-like portion 114, the third plate-like portion 115, and the fourth plate-like portion 116, that is, the longitudinal section of the valve body 11 is substantially rectangular, and rounded transitions may be employed between the plate-like portions. The third plate-like portion 115 is located on one side of the first plate-like portion 111, and the fourth plate-like portion 116 is located on the other side of the first plate-like portion 111. Unless otherwise noted, the dimensional relationships of the various components described below apply to the valve body structure carried in fig. 12 and 13.

In the two valve body main body structures, the plates can be integrally formed, or the plates are welded and shaped after being folded. Reference may be made in particular to the description of other embodiments.

The valve seat 2 is provided with three through hole portions 21, and the through hole portions 21 have an inner diameter D. Of course, the number of the through hole portions may be set according to the needs of the system, and generally, two or more through hole portions are required, and the four-way reversing valve is taken as an example in this embodiment, so that the number of the through hole portions 21 is 3.

The first sleeve portion 12 includes a sliding fit portion 121, and the piston can slide left and right along the sliding fit portion 121 to drive the slider to slide on the surface of the valve seat 2, so that two adjacent valve seat through hole portions 21 are conducted. At this time, the distance by which the slider slides is the distance between the adjacent two valve seat through hole portions 21 of the valve seat. Since in this embodiment the piston slides only in the first sleeve part 12 and the second sleeve part 13, a sealing effect is achieved. The sliding block is not interfered with the first sleeve part 12 and the second sleeve part 13 in the moving direction, and a reserved distance is needed between the sliding block and the sleeve after sliding movement so as to avoid the situation that the sliding block is not in place in the moving direction. To achieve this, assuming that the length of the valve body main body 11 is E and the inner diameter of the valve seat through hole portion is D, the valve body main body length E and the inner diameter D of any valve seat through hole portion satisfy the relation: e is more than or equal to 5.6D and less than or equal to 6.2D. By adopting the size relationship, the electromagnetic switching valve can ensure that the components cannot interfere when the piston drives the sliding block to slide on the surface of the valve seat on the basis of the valve body structure provided by the embodiment, and simultaneously, the size of the valve body is miniaturized as much as possible, so that the material cost is saved. In particular, in different refrigeration systems, electromagnetic switching valves of different specifications are required, and the inner diameters D of the valve seat through holes in the electromagnetic switching valves of different specifications are also different, so that the lengths of the valve body main body parts meeting the above relation can be matched according to the selection of the inner diameters D, thereby reducing the material cost under the condition of meeting the service performance.

Taking the first sleeve portion 12 as an example, which has the sliding engagement portion 121, assuming that the length of the sliding engagement portion is F, the sliding engagement portion length F satisfies the relationship with the inner diameter D of any valve seat through hole portion: f is more than or equal to 2D and less than or equal to 2.4D. It will be appreciated by those skilled in the art that the second sleeve portion may likewise be provided with a slip fit portion, the length of which may be consistent with the first sleeve portion. In theory, even if the length F of the sliding fit part is very long, normal operation of the electromagnetic switching valve can be realized, but the overlong sleeve can bring rise of material cost, the inner diameter D of the valve seat through hole part is taken as a reference, the length F of the sliding fit part is set to be 2D less than or equal to F less than or equal to 2.4D, on one hand, normal sliding of the piston and normal sliding of the sliding block on the surface of the valve seat can be ensured, interference phenomenon is avoided, and on the other hand, the material cost of the sleeve part can be reduced as much as possible.

Further, the width a of the inner flat surface portion of the first plate-like portion 111 satisfies the relation with the inner diameter D of any one of the valve seat through-hole portions 21: a is more than or equal to 1.4D and less than or equal to 2D. The width a of the inner flat surface portion of the first plate-like portion 111 is not too large or too small, and if too large, the overall volume of the valve body main body portion becomes large, which requires higher material cost on the one hand, and does not greatly improve performance on the other hand; too small is unfavorable for the installation and fixation of the valve seat.

In this embodiment, the maximum distance B between the first curved surface portion 112 and the second curved surface portion 113 and the width a of the first plate-like portion may also satisfy the relationship: b is more than or equal to 1.15A and less than or equal to 1.2A. In the range, the two components can achieve better balance, which is beneficial to processing and can achieve better pressure-resistant effect. The height C of the valve body main portion 11 may be defined accordingly, and the maximum distance B between the first curved surface portion 112 and the second curved surface portion 113 and the height C of the first curved surface portion 112 may be set so as to satisfy the relation: b is more than or equal to 1.0 and less than or equal to 1.3C. Meanwhile, the height C of the first curved surface portion 112 may be set closer to the width a of the first plate-like portion. I.e. the values of B and C are set substantially close or B is slightly larger than C. The values of C and a are substantially close. With this structure, the overall structure of the valve body 11 is relatively uniform, and the high-pressure refrigerant pressure acts relatively uniformly on the surfaces inside the valve body, thereby further improving the compressive strength of the valve body.

The electromagnetic switching valve provided by the invention is described in detail above. While specific examples have been described herein for the purpose of illustrating the principles and embodiments of the present invention, the above examples each provide corresponding solutions to different problems, and it should be understood by those skilled in the art that these examples may be combined in various ways to obtain further examples, and the present disclosure is not intended to be exhaustive. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the embodiments and combinations of the embodiments can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The utility model provides an electromagnetic switch valve, its characterized in that includes the valve body, the valve body includes valve body main part, valve body main part includes first platy portion, first curved surface portion, second curved surface portion, first curved surface portion is located one side of first platy portion, second curved surface portion is located the opposite side of second platy portion, first curved surface portion with second curved surface portion sets up relatively, at least one cross section of valve body main part, first curved surface portion with the distance of second curved surface portion is greater than the width of first platy portion.

2. The electromagnetic switching valve according to claim 1, wherein a relation is satisfied by defining a maximum distance between the first curved surface portion and the second curved surface portion as B and defining a width of an inner planar portion of the first plate-like portion as a: b is more than or equal to 1.15A and less than or equal to 1.2A.

3. The electromagnetic switching valve according to claim 2, wherein when the height of the first curved surface portion is defined as C, the relation is satisfied: b is more than or equal to 1.0 and less than or equal to 1.3C.

4. The electromagnetic switching valve according to claim 1, wherein the valve body main body portion further includes a second plate-like portion provided opposite to the first plate-like portion, the second plate-like portion being connected to the first curved surface portion and the second curved surface portion.

5. The electromagnetic switching valve according to any one of claims 1 to 4, wherein the first plate-like portion, the second plate-like portion, the first curved surface portion, and the second curved surface portion are integrally formed or fixedly connected as an integral structure.

6. The electromagnetic switching valve according to any one of claims 1 to 4, wherein the first curved surface portion has a plate shape, and at least a part of a contour line of the first curved surface portion is an arc in a longitudinal section of the first curved surface portion.

7. The electromagnetic switching valve according to claim 4, wherein one end of the first curved surface portion is smoothly transitioned to the first plate-like portion, the other end of the first curved surface portion is smoothly transitioned to the second plate-like portion, one end of the second curved surface portion is smoothly transitioned to the first plate-like portion, and the other end of the second curved surface portion is smoothly transitioned to the second plate-like portion.

8. The electromagnetic switching valve according to claim 6, wherein a center of an arc section contour line of the first curved surface portion is located at a center position in a height direction of the valve body main body portion in a longitudinal section of the first curved surface portion.