A reversing valve

Abstract

The application discloses a reversing valve, a sliding valve core assembly includes a first component and a second component, the second component is arranged in a cavity of the first component, the cavity includes a first opening cavity between the first component and the second component, the second component includes a body part and a fixed part, the second component has a second opening cavity, the openings of the first opening cavity and the second opening cavity are towards a valve seat, the sliding valve core assembly includes a first working position and a second working position, when the sliding valve core assembly is in the first working position, a first valve port, the first opening cavity and a second valve port are communicated, the first valve port, the second opening cavity and the second valve port are communicated, neither the first valve port nor the second valve port is communicated with a valve cavity, when the sliding valve core assembly is in the second working position, the first valve port is communicated with the valve cavity; the body part includes a communication channel, the communication channel communicates the first opening cavity and the second opening cavity, the fluid pressure difference force acting on the second component is reduced, and the action reliability of the reversing valve is improved.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more specifically to a directional valve. Background Technology

[0002] In the field of refrigeration and air conditioning technology, reversing valves are widely used as flow path control devices. They can switch the flow direction of the system medium, thereby enabling heat pump systems such as air conditioners to switch between cooling and heating modes. The sliding valve core assembly is an important component of the reversing valve.

[0003] like Figure 1 The diagram shown is a cross-sectional view of a sliding valve core assembly in the background art. Figure 2 As shown Figure 1 A cross-sectional view of the sliding valve core assembly shown from another direction. Figure 3 As shown Figure 1 The figure shows a perspective view of the flow divider plate in the sliding valve core assembly. As shown, the sliding valve core assembly consists of two chambers, namely slider 01 and flow divider plate 02, which form two flow channels. The fluid entering the assembly flows through the two chambers, and the structure of the flow divider plate is related to the operating performance of the sliding valve core assembly of the reversing valve. Summary of the Invention

[0004] The purpose of this application is to provide a reversing valve, including a valve body, a valve seat, and a sliding valve core assembly. The valve seat is at least partially located in the valve cavity of the reversing valve, and the valve seat includes at least a first valve port and a second valve port. The sliding valve core assembly is slidable relative to the valve seat. The sliding valve core assembly includes a first component and a second component. The second component is disposed in the cavity of the first component. The cavity includes a first opening located between the first component and the second component. The second component includes a body portion and a fixing portion. The second component has a second opening. The openings of the first opening and the second opening face the valve seat. The sliding valve core assembly includes a first working position and a second working position. When the sliding valve core assembly is in the first working position, the first valve port, the first opening, and the second valve port are connected. When the first valve port, the second opening, and the second valve port are connected, the first valve port and the second valve port are not connected to the valve cavity. When the sliding valve core assembly is in the second working position, the first valve port is connected to the valve cavity. The body portion includes a connecting channel that connects the first opening and the second opening.

[0005] The reversing valve of the present application comprises a valve body, a valve seat and a sliding spool assembly, the valve seat is at least partially located in a valve cavity of the reversing valve, the valve seat comprises at least a first valve port and a second valve port, the sliding spool assembly is capable of sliding relative to the valve seat, the sliding spool assembly comprises a first member and a second member, the second member is arranged in a cavity of the first member, the cavity comprises a first opening cavity between the first member and the second member, the second member comprises a body part and a fixing part, the second member has a second opening cavity, openings of the first opening cavity and the second opening cavity are towards the valve seat, the sliding spool assembly comprises a first working position and a second working position, when the sliding spool assembly is in the first working position, the opening part of the first opening cavity is opposite to the first valve port, the opening part of the first opening cavity is opposite to the second valve port, the opening part of the second opening cavity is opposite to the first valve port, the opening part of the second opening cavity is opposite to the second valve port, neither the first valve port nor the second valve port is in communication with the valve cavity, when the sliding spool assembly is in the second working position, the first valve port is in communication with the valve cavity, the body part comprises a communication channel, the communication channel communicates the first opening cavity and the second opening cavity.

[0006] The reversing valve of the present application, the body part of the second member comprises a communication channel, the communication hole communicates the first opening cavity and the second opening cavity, compared with the background technology, the pressure difference between the first opening cavity and the second opening cavity can be improved, the fluid pressure on the second member can be reduced, and the action reliability of the reversing valve can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0008] Figure 2 A cross-sectional view of a sliding spool assembly of the background technology is shown; Figure 1 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0009] Figure 3 A cross-sectional view of a sliding spool assembly of the background technology is shown; Figure 1 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0010] Figure 4 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0011] Figure 5 A cross-sectional view of a sliding spool assembly of the background technology is shown; Figure 4 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0012] Figure 5a A cross-sectional view of a sliding spool assembly of the background technology is shown; Figure 5 A cross-sectional view of a sliding spool assembly of the background technology is shown;

[0013] Figure 5b Fig. 1 shows a perspective view of a slide valve assembly according to an embodiment of the present application; Figure 5 Fig. 2 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 1;

[0014] Figure 5c Fig. 3 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 5b Fig. 4 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 3;

[0015] Figure 5d Fig. 5 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 5 Fig. 6 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 5;

[0016] Figure 6 Fig. 7 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 5 Fig. 8 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 7;

[0017] Figure 6a Fig. 9 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 6 Fig. 10 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 9;

[0018] Figure 7 Fig. 11 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 4 Fig. 12 shows a perspective view of another embodiment of the slide valve assembly of the reversing valve;

[0019] Figure 7a Fig. 13 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 7 Fig. 14 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 13;

[0020] Figure 8 Fig. 15 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 7 Fig. 16 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 15;

[0021] Figure 8a Fig. 17 shows a perspective view of a second component in the slide valve assembly according to an embodiment of the present application; Figure 8 Fig. 18 shows a cross-sectional view of the slide valve assembly along the direction of B-B in Fig. 17. DETAILED DESCRIPTION

[0022] In order to make the technical solution of the present application better understood by those skilled in the art, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] As shown in Figure 4 The reversing valve according to the present application comprises a valve body 100, a valve seat 200 and a slide valve assembly 300, wherein the valve seat 200 is welded and fixed with the valve body 100, the valve seat 200 is located in a valve cavity 101 of the reversing valve, and can also be partially located in the valve cavity 101. The valve seat 200 comprises a first valve port 201, a second valve port 202 and a third valve port 203. The valve body 100 is connected with four connecting pipes E, S, C and D, wherein, Figure 4In the shown embodiment, the first port E is in communication with the first valve port 201, the second port S is in communication with the second valve port 202, and the third port D is in communication with the third valve port 203. It should be noted that, according to the use requirement of the reversing valve, the valve seat 200 of the reversing valve in the embodiment can also have only two valve ports and two ports matched therewith.

[0024] The sliding spool assembly 300 is capable of sliding relative to the valve seat 200 to connect the E and S ports or to connect the S and C ports. The sliding spool assembly 300 includes a first working position and a second working position. When the sliding spool assembly 300 is in the first working position, the E and S ports are connected. When the sliding spool assembly is in the second working position, the S and C ports are connected.

[0025] As shown in Figure 5b , Figure 5c , the sliding spool assembly 300 includes a first member 11 and a second member 12. The first member 11 includes a sliding part 111 and a cover part 112. The sliding part 111 is annular, and the cover part 112 is raised from the bottom surface of the sliding part 111 away from the sliding part 111. The second member 12 is arranged in the cavity of the first member 11 (i.e., the cavity of the first member 11 as a component). The first member 11 and the second member 12 have a first open cavity 110 therebetween. The second member 12 includes a body part 1200 and a fixing part. The second member 12 further includes a second open cavity 120. The first opening 113 of the first open cavity 110 and the second opening 123 of the second open cavity 120 are oriented in the same direction. The fixing part protrudes from the outer wall of the body part 1200 to the inner wall of the first member 11. The first member 11 includes a clamping groove part. The first member 11 and the second member 12 are clamped by the fixing part and the clamping groove part.

[0026] The sliding spool assembly with the above structure, compared with the background art, the first member 11 and the second member 12 cooperate to form the first open cavity 110 and the second open cavity 120. The first open cavity 110 and the second open cavity 120 serve as two flow channels, capable of dividing the flow of fluid and playing a role in stabilizing the flow, reducing the pressure drop loss in the sliding spool assembly. Moreover, the first member 11 and the second member 12 are clamped by the fixing part and the clamping groove part, which is good in assembly process. Especially when the specification of the sliding spool assembly is smaller, the advantage of such process is more obvious.

[0027] In Figure 4In the shown embodiment, the first member 11 and the second member 12 are respectively integrally formed, the shape of the outer wall surface of the body part 1200 of the second member 12 corresponds to the shape of the inner wall surface of the first member 11, specifically, the shape of the outer wall surface of the body part 1200 corresponds to the reduced shape of the inner wall surface of the first member 11. The cover part 112 of the first member 11 includes a first side plate part 115 and a second side plate part 116, the first side plate part 115 is oppositely arranged with the second side plate part 116, the body part 1200 includes a third side plate part 125 and a fourth side plate part 126, the third side plate part 125 is oppositely arranged with the fourth side plate part 126, the first side plate part 115 is arranged in parallel with the third side plate part 125, the second side plate part 116 is arranged in parallel with the fourth side plate part 126, the clamping groove part includes a first clamping groove 131 arranged at the sliding part 111, the fixing part includes a first protruding part 121 protruding from the third side plate part 125, the first protruding part 121 is clamped with the first clamping groove 131.

[0028] The second member 12 is stamped from a metal material, in the embodiment, it is stamped from sheet metal, as shown in the drawings, Figure 6 As shown, the first protruding part 121 of the second member 12 is cylindrical, the diameter of the first protruding part 121 is defined as d, the first clamping groove 131 extends from the end surface of the sliding part 111 away from the cover part 112 to the direction away from the first opening 113, as shown in the drawings, Figure 5d As shown, the first clamping groove 131 includes a guide section 1311 and a containing section 1312, the guide section is a sliding groove 1311, the width of the sliding groove 1311 is defined as b, in the embodiment, it is a straight groove, the shape of the containing section 1312 is matched with the shape of the first protruding part 121, then 0.7d≤b≤0.9d is satisfied, in this way, when the first protruding part 121 of the second member 12 is slid and inserted into the first clamping groove 131 of the first member 11 during assembly, the first protruding part 121 is clamped in the first clamping groove 131. The assembly is convenient and the first protruding part 121 will not come out of the first clamping groove 131.

[0029] The third side plate part 125 includes a second protruding part 122, the fourth side plate part 126 includes a third protruding part 123 and a fourth protruding part 124, the sliding part 111 includes a second clamping groove 132, a third clamping groove 133 and a fourth clamping groove 134 corresponding to the second protruding part 122, the third protruding part 123 and the fourth protruding part 124 respectively, the second protruding part 122 is clamped with the second clamping groove 132, the third protruding part 123 is clamped with the third clamping groove 133, and the fourth protruding part 124 is clamped with the fourth clamping groove 134. In this way, two protruding parts are respectively arranged at the two plate parts of the second member 12, and two corresponding clamping grooves are respectively arranged at the first member 11, after the first member 11 and the second member 12 are clamped and matched, the stability is better.

[0030] In a further scheme, as shown in the drawings, Figure 7 , Figure 7a , Figure 8 andFigure 8a As shown, the body part includes a communication passage, specifically, the sliding spool assembly includes a second member 12B, a connecting part 127 is included between the third side plate part 125 and the fourth side plate part 126, the connecting part 127 includes a top part 1271 opposite to the second opening 123, in this embodiment, the top part 1271 is a flat plate, the top part 1271 includes at least one communication hole 1270, the communication hole 1270 communicates the first opening cavity 110 and the second opening cavity 120. Its role is that, in the actual use process of the sliding spool assembly, because the flow rates of the fluid passing through the upper and lower surfaces of the second member 12 are different, a pressure difference force is generated on the second member 12, in order to reduce the pressure difference force, the communication hole 1270 is arranged on the top part 1271 of the second member 12 as a communication passage, which plays a role of reducing the fluid pressure difference force on the second member 12, as a further scheme, the sum of the flow areas of each communication hole 1270 is 0.5 times to 1 times of the minimum flow area of the first opening cavity 110. The purpose of such arrangement is that, the larger the flow area of the communication hole 1270 is, the better the effect of balancing the pressure is, of course, but if the flow area is too large, it will affect the overall flow when the sliding spool assembly works. It can be understood that the structure of the communication passage is not limited to the shape shown in the figure, it can be a square hole, an irregular hole, or a passage of other shapes, as long as it can realize the communication function of the communication passage of the present scheme. The communication passage can improve the pressure difference between the first opening cavity 110 and the second opening cavity 120, reduce the fluid pressure on the second member, and improve the action reliability of the reversing valve

[0031] In Figure 7a In the embodiment shown, the communication hole 1270 is multiple, that is, three or more, arranged in multiple rows and multiple columns on the top part 1271, each row and each column includes three or more communication holes 1270. Each communication hole can be a circular hole, a triangular hole or other polygonal hole, which is not limited here.

[0032] The sliding spool assembly 300 can slide relative to the valve seat 200, the sliding spool assembly 300 includes a first working position and a second working position, the sliding spool assembly 300 is in Figure 4When the slide valve core assembly 300 is in the first working position, the opening part of the first opening cavity 110 is opposite to the first valve port 201, the opening part of the first opening cavity 110 is opposite to the second valve port 202, the opening part of the second opening cavity 120 is opposite to the first valve port 201, the opening part of the second opening cavity 120 is opposite to the second valve port 202, the first valve port 201 of the reversing valve is communicated with the second valve port 202 through the first opening cavity 110, and the first valve port 201 is also communicated with the second valve port 202 through the second opening cavity 120, but the first valve port 201 and the second valve port 202 are not communicated with the valve cavity 101, when the slide valve core assembly is in the first working position, specifically, the first valve port 201 includes the first branch port 2011 opposite to the first opening cavity 110 and the second branch port 2012 opposite to the second opening cavity 120, the first branch port 2011 is communicated with the second valve port 202 through the first opening cavity 110, and the second branch port 2012 is communicated with the second valve port 202 through the second opening cavity 120, the flow areas of the first branch port 2011 and the second branch port 2012 are substantially the same, (here, substantially the same means that the ratio of the flow area of the first branch port 2011 to the flow area of the second branch port 2012 is greater than or equal to 0.9 and less than or equal to 1.1), and the flow stabilizing effect is good; further, when the slide valve core assembly is in the first working position, the second valve port 202 includes the fourth branch port 2022 opposite to the first opening cavity 110 and the third branch port 2021 opposite to the second opening cavity 120, the flow areas of the third branch port 2021 and the fourth branch port 2022 are substantially the same, (here, substantially the same means that the ratio of the flow area of the third branch port 2021 to the flow area of the fourth branch port 2022 is greater than or equal to 0.9 and less than or equal to 1.1), and the branch effect is further improved. When the slide valve core assembly 300 is in the second working position, the first valve port 201 is communicated with the valve cavity 101, that is, the second valve port 202 is communicated with the third valve port 203 through the first opening cavity 110, and the second valve port 202 is also communicated with the third valve port 203 through the second opening cavity 120, but the second valve port 202 and the third valve port 203 are not communicated with the valve cavity 101. The slide valve core assembly 300 is composed of the first member 11 and the second member 12, and the first member 11 and the second member 12 can form two flow channels of the first opening cavity 110 and the second opening cavity 120 after cooperation, can branch the fluid, reduce the pressure drop loss in the slide valve core assembly, and the first member 11 and the second member 12 are clamped through the fixing part and the clamping groove part, and the assembly process is good. Especially when the specification of the slide valve core assembly is smaller, the advantage of the process is more obvious.

[0033] The above is only a description of specific embodiments of the present application, and it should be pointed out that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A reversing valve, comprising a valve body, a valve seat and a sliding spool assembly, the valve seat being at least partially located in a valve cavity of the reversing valve, the valve seat comprising at least a first valve port and a second valve port, the sliding spool assembly being slidable relative to the valve seat, the sliding spool assembly comprising a first member and a second member, the second member being arranged in a cavity of the first member, the cavity comprising a first opening cavity between the first member and the second member, the second member comprising a body portion and a fixing portion, the second member having a second opening cavity, openings of the first opening cavity and the second opening cavity being towards the valve seat, the sliding spool assembly comprising a first working position and a second working position, when the sliding spool assembly is in the first working position, the first valve port, the first opening cavity and the second valve port are in communication, the first valve port, the second opening cavity and the second valve port are in communication, neither the first valve port nor the second valve port is in communication with the valve cavity, when the sliding spool assembly is in the second working position, the first valve port is in communication with the valve cavity, the body portion comprising a communication channel, the communication channel being in communication with the first opening cavity and the second opening cavity.

2. The reversing valve of claim 1, wherein The first member comprises a sliding portion and a cover portion, the cover portion being raised from the sliding portion, the second member being an integral structure, the cover portion comprising a first side plate portion and a second side plate portion, the first side plate portion and the second side plate portion being oppositely arranged, the body portion comprising a third side plate portion and a fourth side plate portion, the third side plate portion and the fourth side plate portion being oppositely arranged, the third side plate portion and the fourth side plate portion comprising a connecting portion therebetween, the connecting portion comprising a top portion opposite to the opening of the second opening cavity, the top portion comprising the communication channel, the communication channel being one or more than one communication hole, a sum of flow areas of the communication holes being 0.5 times to 1 times of a minimum flow area of the first opening cavity.

3. The reversing valve of claim 2, wherein When the sliding spool assembly is in the first working position, the first valve port comprises a first shunt port opposite to the first opening cavity and a second shunt port opposite to the second opening cavity, the first shunt port being in communication with the second valve port through the first opening cavity, the second shunt port being in communication with the second valve port through the second opening cavity, flow areas of the first shunt port and the second shunt port being substantially the same.

4. A reversing valve according to any one of claims 2-3, characterized in that The fixing portion is protruded from an outer wall of the body portion, an inner wall of the first member comprising a clamping groove portion, the clamping groove portion comprising a first clamping groove arranged in the sliding portion, the fixing portion comprising a first protruding portion protruded from the third side plate portion, the first protruding portion being clamped with the first clamping groove.

5. The reversing valve of claim 4, wherein The fixing portion comprises a second protruding portion protruded from the third side plate portion, the fourth side plate portion comprising a third protruding portion and a fourth protruding portion, the sliding portion comprising a second clamping groove, a third clamping groove and a fourth clamping groove corresponding to the second protruding portion, the third protruding portion and the fourth protruding portion respectively, the second protruding portion being clamped with the second clamping groove, the third protruding portion being clamped with the third clamping groove, the fourth protruding portion being clamped with the fourth clamping groove.

6. The reversing valve of claim 4, wherein The second member is stamped from a metal material, the first protrusion is cylindrical, a diameter of the first protrusion is defined as d, the first clamping groove extends from an end face of the sliding portion away from the cover portion to a first opening direction away from the first opening cavity, the first clamping groove comprises a guide section and a receiving section, the guide section is a sliding groove, a width of the sliding groove is defined as b, the receiving section is shaped to match the shape of the first protrusion, and 0.7d≤b≤0.9d is satisfied.

7. The reversing valve of claim 4, wherein When the sliding spool assembly is in the first working position, the first valve port comprises a first branch port opposite the opening of the first opening cavity and a second branch port opposite the opening of the second opening cavity, the first branch port communicates with the second valve port through the first opening cavity, the second branch port communicates with the second valve port through the second opening cavity, the flow area of the first branch port is substantially the same as that of the second branch port, the second valve port comprises a fourth branch port opposite the opening of the first opening cavity and a third branch port opposite the opening of the second opening cavity, the third branch port communicates with the first valve port through the second opening cavity, the fourth branch port communicates with the first valve port through the first opening cavity, and the flow area of the third branch port is substantially the same as that of the fourth branch port; when the sliding spool assembly is in the second working position, the first valve port communicates with the valve cavity.

8. A reversing valve comprising a valve body, a valve seat and a sliding spool assembly, the valve seat is at least partially located in a valve cavity of the reversing valve, the valve seat comprises at least a first valve port and a second valve port, the sliding spool assembly is capable of sliding relative to the valve seat, the sliding spool assembly comprises a first member and a second member, the second member is arranged in a cavity of the first member, the cavity comprises a first opening cavity between the first member and the second member, the second member comprises a body portion and a fixing portion, the second member has a second opening cavity, openings of the first opening cavity and the second opening cavity are towards the valve seat, the sliding spool assembly comprises a first working position and a second working position, when the sliding spool assembly is in the first working position, an opening part of the first opening cavity is opposite the first valve port, an opening part of the first opening cavity is opposite the second valve port, an opening part of the second opening cavity is opposite the first valve port, and an opening part of the second opening cavity is opposite the second valve port, neither the first valve port nor the second valve port communicates with the valve cavity, when the sliding spool assembly is in the second working position, the first valve port communicates with the valve cavity; the body portion comprises a communication channel, the communication channel communicates the first opening cavity and the second opening cavity.

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