CN216112318U

CN216112318U - Reversing valve

Info

Publication number: CN216112318U
Application number: CN202122662777.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2021-08-03
Filing date: 2021-11-03
Publication date: 2022-03-22
Anticipated expiration: 2031-11-03

Abstract

The application discloses reversing valve, including valve body part, piston link assembly, still include the case, the case with piston link assembly is located the valve chamber of reversing valve, piston link assembly includes the connecting rod, the connecting rod with case fixed connection or spacing connection, the connecting rod has first class through-hole and second flow through-hole, the case includes first breach portion, first breach portion includes first water conservancy diversion face, first water conservancy diversion face part at least is located the below of first flow through-hole's pore wall, and/or the case includes second breach portion, second breach portion includes second water conservancy diversion face, second water conservancy diversion face part at least is located the below of second flow through-hole's pore wall. Reducing the resistance of the valve spool to fluid flow.

Description

Reversing valve

Technical Field

The utility model relates to the technical field of fluid control, in particular to a reversing valve.

Background

In the field of refrigeration and air conditioning technology, a reversing valve is widely used as a flow path control device, and can switch the flow direction of a system medium, so that a heat pump system such as an air conditioner can switch between a refrigeration operation mode and a heating operation mode. The valve core is an important part in the reversing valve.

Fig. 1 is a schematic cross-sectional view of a reversing valve of the prior art, and fig. 2 is a perspective view of a valve core of the reversing valve shown in fig. 1. As shown in the figure, the reversing valve has a valve body 01, a first end cover 02, a second end cover 03, a piston connecting rod assembly 04, a connecting pipe D1, E1 and C1 connected to the valve body 01, a valve cavity of the reversing valve includes three parts, namely a first cavity X between the second end cover 03 and the piston connecting rod assembly 04, a second cavity Y between the first end cover 02 and the piston connecting rod assembly 04, and a third cavity Z between a first piston 041 and a second piston 042 of the piston connecting rod assembly 04, high-pressure fluid in the system enters the third cavity Z from the connecting pipe D1, low-pressure fluid is in the first cavity X, and fluid flowing into the third cavity Z from the connecting pipe D1 can selectively flow into the connecting pipe E1 or the connecting pipe C1 according to different working positions of the valve core 05. During the process of fluid flowing from the connection pipe D1 to the connection pipe E1 or the connection pipe C1, the flat plate portion H of the valve core 05 located below the first hole 043 and the second hole 044 of the piston connecting rod assembly 04 interferes with the flow of the fluid, and the energy loss of the fluid in the reversing valve is increased.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a reversing valve, including valve body part, piston link assembly, still include the case, the case with piston link assembly is located the valve pocket of reversing valve, piston link assembly includes the connecting rod, the connecting rod with case fixed connection or spacing connection, the connecting rod has first class of through-hole and second through-hole, the case includes first breach portion, first breach portion includes first water conservancy diversion face, first water conservancy diversion face part at least is located the below of the pore wall of first through-hole, and/or the case includes second breach portion, second breach portion includes the second water conservancy diversion face, the second water conservancy diversion face part at least is located the below of the pore wall of second through-hole. When fluid flows, the fluid smoothly flows, and the resistance of the valve core to the fluid flow is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art diverter valve;

FIG. 2 is a perspective view of the valve spool of the reversing valve of FIG. 1;

FIG. 3 is a schematic cross-sectional view of an embodiment of the diverter valve of the present application;

FIG. 4 is a schematic perspective view of the valve cartridge of the reversing valve of FIG. 3;

FIG. 5 is a schematic view of an angle of the valve cartridge of FIG. 4;

FIG. 6 is a schematic top view of the valve cartridge of FIG. 4;

FIG. 7 is a schematic top view of the linkage of FIG. 3;

fig. 8 is a perspective view of the connecting rod of fig. 3.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 3, the reversing valve of the present embodiment includes a valve body component, a valve seat component and a valve core 300, a piston and connecting rod assembly 400, a first end cover 500 and a second end cover 600, wherein the valve body component and the valve seat component are directly or indirectly welded and fixed, for example, in the present embodiment, the valve body component includes a valve body 100, the valve seat component includes a valve seat 200, wherein the valve seat 200 and the valve body 100 are directly welded and fixed, and the valve seat 200 and the valve body 100 can also be indirectly fixed through a third component. The valve seat 200 is located within the valve chamber of the reversing valve and may also be partially located within the valve chamber. The piston connecting rod assembly 400 is located in a valve cavity of the reversing valve, and the piston connecting rod assembly 400 can drive the valve core 300 to enable the valve core 300 to slide relative to the valve seat 200. The valve seat 200 includes a first port 201, a third port 203, and a second port 202. The valve body 100 has four holes, which are a first communication hole 101, a second communication hole 102, a third communication hole 103, and a fluid inlet 104. E, S, C, D four connecting pipes are communicated with the valve body 100, wherein in FIG. 3, the first connecting pipe E, the first connecting hole 101 and the first valve port 201 are communicated, the third connecting pipe S, the third connecting hole 103 and the third valve port 203 are communicated, and the second connecting pipe C, the second connecting hole 102 and the second valve port 202 are communicated. The fourth nozzle D communicates with the valve chamber of the reversing valve through the fluid inlet 104. It should be noted here that, according to the usage requirement of the reversing valve, in this embodiment, the valve seat 200 of the reversing valve may have only two valve ports, and the valve body 100 may also be communicated with only two connecting pipes matching with the two valve ports.

The piston and connecting rod assembly 400 comprises a connecting rod 401, a first piston 402 and a second piston 403, and the valve core 300 is clamped and limited or fixedly connected with the connecting rod 401 in other modes. The valve body 300 is slidable with respect to the valve seat 200 to communicate the first nozzle E and the third nozzle S or to communicate the third nozzle S and the second nozzle C.

As shown in fig. 3 to 8, the valve element 300 includes a base portion 111 and a cover portion 112, the base portion 111 has a ring shape, the cover portion 112 is raised from the base portion 111 in a direction away from the valve seat 200, the valve element 300 has a valve element chamber 110, and the valve element chamber 110 is enclosed by the cover portion 112 and the base portion 111. The spool chamber 110 is open to the valve seat 200, the base 111 is located on the lower side of the connecting rod 401, the cover 112 is snap-fitted to the connecting rod 401, and the connecting rod 401 includes a first flow through hole 4011 between the cover 112 and the first piston 402 and a second flow through hole 4012 between the cover 112 and the second piston 403. The valve chamber of the reversing valve is divided by the piston and connecting rod assembly 400 into a first chamber 405 between the first piston 402 and the second piston 403, a second chamber 406 on the side of the first piston 402 remote from the first chamber 405, and a third chamber 407 on the side of the second piston 403 remote from the first chamber 405, respectively. The sizes of the second and

third chambers

406, 407 vary when the valve spool 300 is in different operating positions. The valve core 300 includes a first operating position and a second operating position, when the valve core 300 is located at the first operating position, the first connecting pipe E and the third connecting pipe S are communicated and are not communicated with the valve chamber, the fourth connecting pipe D, the fluid inlet 104, the second flow through hole 4012, the second communication hole 102 and the second connecting pipe C are communicated, when the valve core 300 is located at the second operating position, the second connecting pipe C and the third connecting pipe S are communicated and are not communicated with the valve chamber, and the fourth connecting pipe D, the fluid inlet 104, the first flow through hole 4011, the first communication hole 101 and the first connecting pipe E are communicated.

As shown in fig. 1, during the process that the fluid enters the third chamber Z from the connection pipe D1, flows out from the connection pipe E1 through the first hole 043, and the fluid enters the third chamber Z from the connection pipe D1, flows out from the connection pipe C1 through the second hole 044, the flat plate portion H of the valve core 05 may block the flow of the fluid, which affects the energy efficiency of the reversing valve. For this purpose, as shown in fig. 3 to 6, the valve body 300 includes a first notch portion 301 and a second notch portion 302, the first notch portion 301 is at least partially located below a hole wall of the first flow through hole 4011, and the second notch portion 302 is at least partially located below a hole wall of the second flow through hole 4012, and the first flow guide surface 3011 and the second flow guide surface 3012 enable the fluid to smoothly flow during the process of flowing the fluid from the fluid inlet 104 to the first connection hole 101 through the first flow through hole 4011 and flowing the fluid out from the first connection pipe E, or during the process of flowing the fluid from the fluid inlet 104 to the second connection hole 102 through the second flow through hole 4012 and flowing the fluid out from the second connection pipe C, so that resistance of the valve body 300 to the fluid flow is reduced, energy loss of the fluid in the direction change valve is reduced, and a system to which the direction change valve of the present application is applied is improved.

As a further alternative, as shown in fig. 6, 7 and 8, the first flow through hole 4011 and the second flow through hole 4012 of the connecting rod 400 are circular through holes, a projection area of the first flow guide surface 3011 in the horizontal direction at least partially coincides with a projection area of the first flow through hole 4011 in the horizontal direction, in particular, a projection contour of the first flow guide surface 3011 in the horizontal direction at least partially lies on a projection contour of a hole wall of the first flow through hole 4011 in the horizontal direction, a projection area of the second flow guide surface 3012 in the horizontal direction at least partially coincides with a projection area of the second flow through hole 4012 in the horizontal direction, in particular, a projection contour of the second flow guide surface 3012 in the horizontal direction at least partially lies on a projection contour of a hole wall of the second flow through hole 4012 in the horizontal direction, so that fluid flows more smoothly from the second flow through hole 4012 to the second connecting pipe C.

As shown in fig. 4 and 5, each of the first notch portion 301 and the second notch portion 302 includes two sides, each of the two sides is arc-shaped, and as a specific configuration, the first notch portion 301 and the second notch portion 302 extend from the upper surface of the base portion 111 to the lower surface of the base portion 111, but do not intersect with the lower surface of the base portion 111, that is, the first notch portion 301 and the second notch portion 302 do not extend to the lower surface of the base portion 111, that is, the two sides of the first notch portion 301 are located on the upper surface and the side surface of the base portion, and the two sides of the second notch portion 302 are located on the upper surface and the side surface of the base portion, respectively, which has an advantageous effect that the matching between the lower surface of the base portion 111 and the matching surface of the valve seat 200 is not affected on the premise that the fluid flow resistance of the valve element 300 is reduced.

The foregoing is merely an illustration of specific embodiments of this invention and it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and are intended to be within the scope of the utility model.

Claims

1. The reversing valve comprises a valve body component and a piston connecting rod assembly, and is characterized by further comprising a valve core, wherein the valve core and the piston connecting rod assembly are located in a valve cavity of the reversing valve, the piston connecting rod assembly comprises a connecting rod, the connecting rod is fixedly connected or in limited connection with the valve core, the connecting rod is provided with a first flow through hole and a second flow through hole, the valve core comprises a first gap portion, the first gap portion comprises a first flow guide surface, at least part of the first flow guide surface is located below a hole wall of the first flow through hole, and/or the valve core comprises a second gap portion, the second gap portion comprises a second flow guide surface, and at least part of the second flow guide surface is located below a hole wall of the second flow through hole.

2. The reversing valve according to claim 1, further comprising a valve seat member fixedly connected directly or indirectly to the valve body member, wherein the valve seat member comprises a valve seat, the connecting rod can drive the valve element to slide relative to the valve seat, the valve seat has a first valve port and a second valve port, the reversing valve has a fluid inlet, a first communication hole and a second communication hole, the valve element comprises a first working position and a second working position, when the valve element is located at the first working position, the fluid inlet, the first flow hole, the first valve port and the first communication hole are communicated, and when the valve element is located at the second working position, the fluid inlet, the second flow hole, the second valve port and the second communication hole are communicated; the projection area of the first flow guide surface in the horizontal direction is at least partially overlapped with the projection area of the first flow through hole in the horizontal direction.

3. The reversing valve of claim 2, wherein a projected contour of the first flow directing surface in the horizontal direction is at least partially located on a projected contour of a bore wall of the first flow through bore in the horizontal direction.

4. The reversing valve according to claim 2, wherein the projected contour of the second flow guiding surface in the horizontal direction is at least partially located on the projected contour of the hole wall of the second flow through hole in the horizontal direction.

5. The reversing valve according to any one of claims 2 to 4, wherein the valve body includes a cover portion and a base portion, the cover portion protrudes from the base portion in a direction away from the valve seat, the cover portion is fixedly or limitedly connected to the link, the base portion is located at a lower side of the link, the first notch portion and the second notch portion extend from an upper surface of the base portion in a direction toward a lower surface of the base portion without intersecting with the lower surface of the base portion, and the first notch portion and the second notch portion each include two sides each having an arc shape.

6. The reversing valve according to claim 5, wherein the first flow through hole is a circular hole, the second flow through hole is a circular hole, a projected contour of the first flow guiding surface in the horizontal direction is located on a projected contour of a hole wall of the first flow through hole in the horizontal direction, and a projected contour of the second flow guiding surface in the horizontal direction is located on a projected contour of a hole wall of the second flow through hole in the horizontal direction.