reversing valve

Abstract

The present invention provides a reversing valve comprising: a valve body having a chamber, an inlet channel, and multiple outlet channels, both of which are connected to the chamber; a valve core assembly movably disposed within the chamber, with a first side of the valve core assembly facing the multiple outlet channels and a second side of the valve core assembly facing the inlet channel; wherein the cross-sectional area of the inlet channel is S1; when the valve core assembly is positioned below the inlet channel, an exhaust channel is formed between the projection of the end of the inlet channel on the second side of the valve core assembly and the end of the inlet channel; and the sidewall area of the exhaust channel is S2, where S1 / S2 ≥ 1. The technical solution provided by this application can address the problem of reversing failure in related art reversing valves.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valves, and in particular to a reversing valve. Background Art

[0002] like Figure 1 As shown, the existing four-way valve structure mainly includes a valve chamber and an inlet pipe 2, a first outlet pipe 3, and a second outlet pipe 4 connected to the valve chamber. The slider 1 is movably arranged in the valve chamber. By moving the slider 1, the valve chamber can be connected to the first outlet pipe 3 or the second outlet pipe 4. During the switching process, when the slider 1 moves to the middle position (below the inlet channel 2), the first outlet pipe 3, the second outlet pipe 4, and the low-pressure pipe are connected to each other, resulting in a rapid pressure release in the valve chamber. The capillary tube connected to the inlet pipe 2 is insufficiently supplied with pressure, causing the thrust on the left and right sides of the piston baffle to decrease. In severe cases, the slider 1 may stop in the middle and be unable to move further, causing the four-way valve to fail. Summary of the Invention

[0003] The present invention provides a reversing valve to solve the problem that reversing valves in related technologies are prone to reversing failure.

[0004] The present invention provides a reversing valve, which includes: a valve body having a chamber, an inlet channel and multiple outlet channels, wherein the inlet channel and the outlet channels are both connected to the chamber; a valve core assembly is movably arranged in the chamber, wherein a first side of the valve core assembly is arranged toward the multiple outlet channels, and a second side of the valve core assembly is arranged toward the inlet channel; wherein a cross-sectional area of the inlet channel is S1, and when the valve core assembly is located below the inlet channel, an exhaust channel is formed between a projection of an end of the inlet channel on the second side of the valve core assembly and the end of the inlet channel, and a side wall area of the exhaust channel is S2, and S1 / S2 ≥ 1.

[0005] By applying the technical solution of the present invention and setting the ratio of S1 to S2 within the aforementioned range, when the valve core assembly moves to the intermediate position, it is possible to ensure that fluid with sufficient pressure in the inlet channel flows into the capillary tube connected to the inlet channel, thereby ensuring sufficient pressure to push the valve core assembly to continue moving, so that the valve core assembly moves to the reversing position. This structure can prevent the slider from stopping during the reversing process, ensuring normal reversing.

[0006] Furthermore, the second side of the valve core assembly has a shielding portion, and an exhaust passage is formed between the projection of the end of the inlet channel on the shielding portion and the end of the inlet channel. During movement and reversal of the valve core assembly, the shielding portion partially blocks the inlet channel. This ensures that even when the outlet channels are interconnected, the inlet channel can still provide sufficient fluid pressure to the capillary tube, thereby ensuring that the reversing valve piston pushes the valve core assembly to continue moving to the preset position, ensuring normal channel reversal.

[0007] Furthermore, the surface of the shielding portion near the inlet channel is an arc-shaped structure or a flat structure. Setting the surface of the shielding portion near the inlet channel to a flat structure facilitates calculation of the sidewall area of the exhaust channel, thereby facilitating control of the ratio of S1 to S2. Furthermore, the flat structure is simple and has low manufacturing costs. Setting the surface of the shielding portion near the inlet channel to an arc-shaped structure, since the end of the inlet channel is also arc-shaped, can utilize this arc-shaped structure to better match the end of the inlet channel to improve the shielding effect.

[0008] Furthermore, the valve core assembly includes a guide frame and a slider, the guide frame being drivably connected to the slider, and the shielding portion being disposed on the slider. The guide frame drives the slider to move within the chamber, and the slider is used to switch the communication state between the multiple outlet channels and the chamber. Disposing the shielding portion on the slider facilitates machining of the shielding portion, thereby reducing machining costs.

[0009] Furthermore, the shielding portion is a shielding boss, which is arranged on the side of the slider facing the inlet channel. By arranging the shielding boss, there is no need to make major improvements to the slider, which is convenient for processing the slider and has low improvement costs.

[0010] Furthermore, a portion of the surface of the slider facing the inlet channel forms a shielding portion. By using the upper surface of the slider to form the shielding portion, the structure of the slider is relatively simple, the slider is easy to process, and the processing cost can be reduced.

[0011] Furthermore, the shielding portion and the slider are an integrally formed structure, which is easy to process and assemble, has low cost, and can improve installation efficiency.

[0012] Furthermore, the valve body has a low-pressure channel and two outlet channels, which are arranged side by side on one side of the valve body, and an inlet channel is arranged on the other side of the valve body, with the low-pressure channel located between the two outlet channels, and the inlet channel is arranged corresponding to the low-pressure channel. The shielding portion is located in the middle of the slider. Placing the shielding portion in the middle of the slider facilitates machining of the slider, can ensure machining accuracy, and thus ensure the shielding effect of the shielding portion.

[0013] Furthermore, the maximum cross-sectional size of the shielding portion is greater than or equal to the size of the inlet channel, so that the shielding effect of the shielding portion can be ensured and the ratio of S1 to S2 can be easily controlled.

[0014] Furthermore, the diameter of the inlet channel is d, and the cross-sectional area of the inlet channel is S1 = π·(d / 2) 2The distance between the projection of the end of the inlet channel on the second side of the valve core assembly and the end of the inlet channel is X, and the sidewall area of the exhaust channel S2 = π·d·X. This can prevent the slider from stopping during the reversing process, ensuring normal reversing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram showing the structure of a reversing valve provided by the related art is shown;

[0017] Figure 2 A schematic structural diagram of a reversing valve provided in the first embodiment of the present invention is shown;

[0018] Figure 3 A partial cross-sectional view of a reversing valve provided in the first embodiment of the present invention is shown;

[0019] Figure 4 A schematic diagram showing the dimensions of a reversing valve provided in the first embodiment of the present invention is shown;

[0020] Figure 5 A partial cross-sectional view of a reversing valve provided in the second embodiment of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Valve body; 11. Chamber; 12. Inlet channel; 13. Outlet channel; 14. Low-pressure channel; 20. Valve core assembly; 21. Shielding portion; 22. Guide frame; 23. Slider; 30. Exhaust channel; d. Diameter of the inlet channel; X. Distance between the projection of the end of the inlet channel on the second side of the valve core assembly and the end of the inlet channel. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figures 2 to 4As shown, a first embodiment of the present invention provides a reversing valve, comprising a valve body 10 and a valve core assembly 20. The valve body 10 has a chamber 11, an inlet channel 12, and multiple outlet channels 13. Both the inlet channel 12 and the outlet channels 13 are connected to the chamber 11. The valve core assembly 20 is movably disposed within the chamber 11. A first side of the valve core assembly 20 faces the multiple outlet channels 13, and a second side of the valve core assembly 20 faces the inlet channels 12. As the valve core assembly 20 moves within the chamber 11, the connection between the multiple outlet channels 13 and the chamber 11 can be switched using the valve core assembly 20. The cross-sectional area of the inlet channel 12 is S1. When the valve core assembly 20 is located below the inlet channel 12, an exhaust channel 30 is formed between the projection of the end of the inlet channel 12 on the second side of the valve core assembly 20 and the end of the inlet channel 12. The sidewall area of the exhaust channel 30 is S2, where S1 / S2 ≥ 1.

[0025] By setting the ratio of S1 to S2 within the aforementioned range when the spool assembly 20 moves to the intermediate position, the reversing valve provided in this embodiment ensures that fluid with sufficient pressure within the inlet passage 12 flows into the capillary tube connected to the inlet passage 12, thereby ensuring sufficient pressure to push the spool assembly 20 to continue moving, thereby moving the spool assembly 20 to the reversing position. This structure prevents the slider from stalling during the reversing process, ensuring normal reversing.

[0026] It should be noted that, in this embodiment, the exhaust channel 30 refers to a cylindrical channel formed by the projection of the end of the inlet channel 12 on the second side of the valve core assembly 20 and the end of the inlet channel 12. The fluid in the inlet channel 12 can flow into the chamber 11 through the side wall of the cylindrical channel.

[0027] like Figure 2 and Figure 3 As shown, the second side of the valve core assembly 20 has a shielding portion 21, and an exhaust channel 30 is formed between the projection of the end of the inlet channel 12 on the shielding portion 21 and the end of the inlet channel 12. During the movement and reversing process of the valve core assembly 20, the shielding portion 21 partially blocks the inlet channel 12. This ensures that even when the outlet channels are interconnected, the inlet channel can still provide sufficient fluid pressure to the capillary tube, thereby ensuring that the reversing valve piston pushes the valve core assembly 20 to continue moving to the preset position, ensuring normal channel reversal.

[0028] The shielding portion 21 includes a structure integrally formed with the valve core assembly 20 , and the shielding portion 21 also includes a structure separately provided from the valve core assembly 20 .

[0029] Specifically, the surface of the shielding portion 21 near the inlet passage 12 is an arc-shaped or planar structure. In this embodiment, the surface of the shielding portion 21 near the inlet passage 12 is a planar structure. This facilitates calculation of the sidewall area of the exhaust passage 30 and, in turn, facilitates control of the ratio of S1 to S2. Furthermore, the planar structure offers a simple structure and low manufacturing costs.

[0030] In other embodiments, the surface of the shielding portion 21 close to the inlet channel 12 can be set to an arc-shaped structure. Since the end of the inlet channel 12 is also arc-shaped, the arc-shaped structure can be used to better cooperate with the end of the inlet channel to improve the shielding effect.

[0031] like Figure 2 As shown, in this embodiment, the valve core assembly 20 includes a guide frame 22 and a slider 23. The guide frame 22 is drivingly connected to the slider 23, and the shielding portion 21 is disposed on the slider 23. The guide frame 22 drives the slider 23 to move within the chamber 11, and the slider 23 is used to switch the communication state between the multiple outlet channels 13 and the chamber 11. Disposing the shielding portion 21 on the slider 23 facilitates machining of the shielding portion 21, thereby reducing machining costs.

[0032] Specifically, when the valve core assembly 20 moves to the middle position, the blocking portion 21 on the slider 23 can block a portion of the air inlet area of the inlet channel 12, which not only reduces the mass flow rate of refrigerant leakage when the slider 23 is in the middle position, but also forces the refrigerant to enter the capillary tube connected to the inlet channel 12, thereby increasing the pressure entering the left end cavity and increasing the thrust of the piston baffle, so that the slider 23 can smoothly achieve reversing.

[0033] In this embodiment, the shielding portion 21 is a shielding boss, which is provided on the side of the slider 23 facing the inlet channel 12. By providing the shielding boss, there is no need to make major improvements to the slider 23, which facilitates processing of the slider 23 and reduces improvement costs.

[0034] The surface of the shielding boss close to the inlet channel 12 is an arc-shaped structure or a plane structure.

[0035] In this embodiment, the shielding portion 21 and the slider 23 are an integrally formed structure, which is easy to process and assemble, has low cost, and can improve installation efficiency.

[0036] Of course, the shielding portion 21 and the slider 23 can also be set as a separate structure. The shielding portion 21 has a top surface and a bottom surface that are arranged opposite to each other. The top surface of the shielding portion 21 is used to block the inlet channel. Its top surface can be a flat surface or an arcuate surface. The bottom surface of the shielding portion 21 is an arcuate surface, which is adapted to the upper surface of the slider 23, and the bottom surface of the shielding portion 21 is connected to the slider 23. Specifically, the connection can be made by bonding, welding or other connection methods. Through the above structure, the device structure can be simplified, the slider 23 and the shielding portion 21 can be processed more easily, the processing efficiency is improved, and the processing cost of the parts is reduced.

[0037] In this embodiment, the guide frame 22 is provided with an avoidance hole, and the slider 23 is passed through the avoidance hole. Through the above structure, the slider 23 is passed through and fixed in the guide frame 22, one end of the slider 23 is located on one side of the guide frame 22, and the other end of the slider 23 is located on the other side of the guide frame 22, so that the guide frame 22 can drive the slider 23 to move horizontally.

[0038] The slider 23 has multiple communication positions within the chamber 11. When the slider 23 moves to one of the communication positions, the corresponding outlet channel 13 communicates with the chamber 11, while the other outlet channels 13 are isolated from the chamber 11 by the slider 23. As the slider 23 moves from one communication position to the next, the inlet channel 12 can be shielded by the shielding portion 21. This prevents the slider 23 from causing the multiple outlet channels 13 to intercommunicate during movement, which could result in insufficient pressure supplied by the inlet channel 12 to the capillary tubes connected thereto. In this embodiment, the slider 23 has a first and second relative communication position. As the slider 23 moves between the first and second communication positions, the shielding portion 21 can shield the inlet channel 12.

[0039] like Figure 2 As shown, in this embodiment, the valve body 10 has a low-pressure channel 14 and two outlet channels 13, which are arranged side by side on one side of the valve body 10, and the inlet channel 12 is arranged on the other side of the valve body 10. The low-pressure channel 14 is located between the two outlet channels 13, and the inlet channel 12 is arranged corresponding to the low-pressure channel 14. The shielding portion 21 is located in the middle of the slider 23. The shielding portion 21 is arranged in the middle of the slider 23 to facilitate the processing of the slider 23, ensure the processing accuracy, and thus ensure the shielding effect of the shielding portion 21.

[0040] like Figure 2As shown, when the slider 23 moves to the middle position, the two outlet channels 13 and the low-pressure channel 14 are connected to each other. At this time, the pressure in the chamber 11 is relatively low. By providing a shielding portion 21 and using the shielding portion 21 to shield the inlet channel 12 when the slider 23 moves to the middle, the fluid in the inlet channel 12 can be prevented from leaking into the chamber 11. In this way, the fluid in the inlet channel 12 can flow to the left side of the chamber 11, ensuring that the fluid has sufficient pressure to push the left piston to continue to move to the right, and then drive the guide frame 22 and the slider 23 to continue to move to the right, so that the cavity cover of the slider 23 is set in the low-pressure channel 14 and the right outlet channel 13, and the left outlet channel 13 is connected to the inlet channel 12. At this time, the slider 23 is in the second connecting position, and the valve body completes the switching operation.

[0041] The maximum cross-sectional size of the shielding portion 21 is greater than or equal to the size of the inlet channel 12 , so that the shielding effect of the shielding portion 21 can be ensured, and the ratio of S1 to S2 can be controlled easily.

[0042] Specifically, it is sufficient as long as the shielding portion 21 can shield the fluid in the inlet channel when it moves to the end of the inlet channel to ensure the fluid pressure on the capillary tube connected to the inlet channel.

[0043] like Figure 4 As shown, in this embodiment, the inlet channel 12 is a circular channel, the diameter of the inlet channel 12 is d, and the cross-sectional area S1 of the inlet channel 12 is π·(d / 2) 2 The distance between the projection of the end of the inlet channel 12 on the second side of the valve core assembly 20 and the end of the inlet channel 12 is X, and the sidewall area S2 of the exhaust channel 30 is π·d·X.

[0044] In this embodiment, the reversing valve includes an electromagnetic four-way reversing valve.

[0045] like Figure 5 As shown, a second embodiment of the present invention provides a reversing valve. The difference between the second embodiment and the first embodiment is that, in the second embodiment, a portion of the surface of the slider 23 facing the inlet channel 12 forms a shielding portion 21. By forming the shielding portion 21 on the upper surface of the slider 23, the structure of the slider 23 is relatively simple, which facilitates the processing of the slider 23 and can reduce processing costs.

[0046] The technical solution provided in this application has a simple structure and is easy to manufacture and process, which can avoid reversing failure of the valve body and ensure the normal operation of the valve body.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0049] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0052] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A reversing valve, characterized in that: The reversing valve comprises: A valve body (10) having a chamber (11), an inlet channel (12), and a plurality of outlet channels (13), wherein the inlet channel (12) and the outlet channels (13) are both in communication with the chamber (11); A valve core assembly (20) is movably disposed in the chamber (11), wherein a first side of the valve core assembly (20) is disposed toward the plurality of outlet channels (13), and a second side of the valve core assembly (20) is disposed toward the inlet channel (12); The cross-sectional area of the inlet channel (12) is S1, and when the valve core assembly (20) is located below the inlet channel (12), an exhaust channel (30) is formed between a projection of the end of the inlet channel (12) on the second side of the valve core assembly (20) and the end of the inlet channel (12), and the side wall area of the exhaust channel (30) is S2, and S1 / S2 ≥ 1; The second side of the valve core assembly (20) has a shielding portion (21), and the exhaust channel (30) is formed between a projection of the end of the inlet channel (12) on the shielding portion (21) and the end of the inlet channel (12); The valve core assembly (20) comprises a guide frame (22) and a slider (23), wherein the guide frame (22) is drivingly connected to the slider (23), the guide frame (22) is provided with an avoidance hole, and the slider (23) is inserted into the avoidance hole.

2. The reversing valve according to claim 1, characterized in that: The surface of the shielding portion (21) close to the inlet channel (12) is an arc-shaped structure or a plane structure.

3. The reversing valve according to claim 1 or 2, characterized in that: The shielding portion (21) is arranged on the sliding block (23).

4. The reversing valve according to claim 3, characterized in that: The shielding portion (21) is a shielding boss, and the shielding boss is arranged on a side of the slider (23) facing the inlet channel (12).

5. The reversing valve according to claim 3, characterized in that: A portion of the surface of the slider (23) facing the inlet channel (12) forms the shielding portion (21).

6. The reversing valve according to claim 3, characterized in that: The shielding portion (21) and the sliding block (23) are an integrally formed structure.

7. The reversing valve according to claim 3, characterized in that: The valve body (10) has a low-pressure channel (14) and two outlet channels (13), the low-pressure channel (14) and the two outlet channels (13) are arranged side by side on one side of the valve body (10), the inlet channel (12) is arranged on the other side of the valve body (10), the low-pressure channel (14) is located between the two outlet channels (13), the inlet channel (12) is arranged corresponding to the low-pressure channel (14), and the shielding portion (21) is located in the middle of the slider (23).

8. The reversing valve according to claim 1 or 2, characterized in that: The maximum cross-sectional dimension of the shielding portion (21) is greater than or equal to the dimension of the inlet channel (12).

9. The reversing valve according to any one of claims 1 to 2, characterized in that: The diameter of the inlet channel (12) is d, and the cross-sectional area of the inlet channel (12) is S1=π▪(d / 2) 2 The distance between the projection of the end of the inlet channel (12) on the second side of the valve core assembly (20) and the end of the inlet channel (12) is X, and the side wall area of the exhaust channel (30) is S2=π▪d▪X.

Images