Valve core assembly and reversing valve having the same

Abstract

The present invention provides a valve core assembly and a reversing valve having the same. The valve core assembly comprises a guide frame and a slider, the guide frame being drivingly connected to the slider, one side of the slider having a cavity, and the other side of the slider having a blocking portion for blocking an inlet passage. The technical solution provided by this application can solve the problem of reversing failure in prior art reversing valves.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valves, and in particular to a valve core assembly and a reversing valve having the same. 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. A 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, 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, resulting in a decrease in the thrust on the left and right sides of the piston baffle. 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 valve core assembly and a reversing valve having the same, so as to solve the problem that the reversing valve in the prior art is prone to reversing failure.

[0004] According to one aspect of the present invention, a valve core assembly is provided, which includes: a guide frame; a slider, the guide frame is drivingly connected to the slider, one side of the slider has a cavity, and the other side of the slider is provided with a blocking portion, which is used to block the inlet channel.

[0005] Furthermore, the surface of the blocking portion close to the inlet channel is an arc-shaped structure.

[0006] Furthermore, the surface of the blocking portion close to the inlet channel is a planar structure.

[0007] Furthermore, the blocking portion and the slider are an integrally formed structure.

[0008] Furthermore, the blocking portion has a top surface and a bottom surface that are relatively arranged. The top surface of the blocking portion is used to block the inlet channel, and the bottom surface is an arc-shaped surface. The bottom surface is adapted to the upper surface of the slider, and the bottom surface of the blocking portion is connected to the slider.

[0009] Furthermore, the guide frame has an avoidance hole, and the slider is inserted into the avoidance hole.

[0010] Furthermore, the slider includes a main body and a base plate, the main body has a cavity, the blocking portion is arranged on the top of the main body, the base plate is annularly arranged on the bottom of the main body, the base plate cooperates with the avoidance hole to limit the relative position of the slider and the guide frame, the base plate is located on one side of the guide frame, and the blocking portion is located on the other side of the guide frame.

[0011] According to another aspect of the present invention, a reversing valve is provided, which includes: a valve body, the valve body having an inlet channel, multiple outlet channels and a chamber, the inlet channel and the outlet channels are both connected to the chamber; a valve core assembly, the valve core assembly is the valve core assembly provided above, the valve core assembly is movably arranged in the chamber, the side of the slider of the valve core assembly having the cavity is arranged toward the multiple outlet channels, and the side of the slider having the blocking portion is arranged toward the inlet channel, and the blocking portion has a blocking position for blocking the inlet channel and a conducting position for conducting the inlet channel.

[0012] Furthermore, the valve body has two outlet channels and a low-pressure channel, which are arranged side by side on one side of the valve body, and the inlet channel is arranged on the other side of the valve body. The low-pressure channel is located between the two outlet channels, and the inlet channel is arranged corresponding to the low-pressure channel. The sealing portion is located in the middle of the slider.

[0013] Furthermore, the cross-sectional size of the blocking portion is greater than or equal to the size of the inlet channel.

[0014] Applying the technical solution of the present invention, the valve core assembly includes a guide frame and a slider, which is drivingly connected to the guide frame. A blocking portion is provided on one side of the slider, which blocks the inlet channel. When the slider moves to an intermediate position, the blocking portion blocks the inlet channel to ensure that fluid with sufficient pressure in the inlet channel flows into the capillary tube connected to the inlet channel, thereby ensuring that sufficient pressure pushes the piston to continue moving, so that the slider moves to the reversing position. Through the above structure, it is possible to 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 an embodiment of the present invention is shown;

[0018] Figure 3 Another structural schematic diagram of a reversing valve provided according to an embodiment of the present invention is shown;

[0019] Figure 4 Shown Figure 2 A schematic structural diagram of a first embodiment of a middle slider;

[0020] Figure 5 Shown Figure 2A schematic structural diagram of a second embodiment of the middle slider;

[0021] Figure 6 A schematic structural diagram of a blocking portion provided according to an embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 1. Slider; 2. Inlet pipe; 3. First outlet pipe; 4. Second outlet pipe;

[0024] 10. Guide frame; 20. Slider; 21. Main body; 22. Bottom plate; 30. Sealing part; 40. Valve body; 41. Inlet channel; 42. Outlet channel; 43. Low-pressure channel; 44. Chamber. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 2 and Figure 3 As shown, an embodiment of the present application provides a valve core assembly comprising a guide frame 10 and a slider 20. The guide frame 10 is drivingly connected to the slider 20, driving the slider 20 within the valve cavity. The slider 20 has a cavity on one side and a sealing portion 30 on the other side. The sealing portion 30 is used to seal the inlet channel. The cavity is used to isolate a portion of the outlet channel, allowing fluid to flow out of a specific outlet channel.

[0027] Through the technical solution provided in this application, the slider 20 can use the sealing part 30 to block the inlet channel during the movement and reversing process, so that when the outlet channels are interconnected, the inlet channel can also provide sufficient fluid pressure to the capillary, thereby ensuring that the reversing valve piston pushes the guide frame 10 and the slider 20 to continue moving to the preset position, ensuring the normal reversing of the channel.

[0028] Among them, such as Figure 4 As shown, the surface of the blocking portion 30 close to the inlet channel can be a planar structure, which has a simple structure and low processing and manufacturing cost.

[0029] Among them, such as Figure 5As shown, the surface of the blocking portion 30 close to the inlet channel can also be set to an arc structure. By setting the blocking portion 30 to an arc structure, the arc structure can be utilized to better fit with the end of the inlet channel to improve the blocking effect.

[0030] Specifically, the size of the blocking portion 30 can be larger than the size of the end of the inlet channel, or can be set to be equal to the size of the end of the inlet channel, or can be smaller than the size of the end of the inlet channel, as long as the blocking portion 30 can block and obstruct the fluid in the inlet channel when it moves to the end of the inlet channel, thereby ensuring the fluid pressure on the capillary connected to the inlet channel.

[0031] exist Figure 4 and Figure 5 In the structure shown, the blocking portion 30 and the slider 20 are integrally formed, which has a simple structure, is easy to process and install, and can improve installation efficiency.

[0032] Of course, the blocking portion 30 and the slider 20 can also be set as a separate structure. Figure 6 As shown, the blocking portion 30 has a top surface and a bottom surface that are arranged opposite to each other. The top surface of the blocking portion 30 is used to block the inlet channel. The top surface can be flat or curved. The bottom surface of the blocking portion 30 is curved and matches the upper surface of the slider 20. The bottom surface of the blocking portion 30 is connected to the slider 20. Specifically, the connection can be achieved by bonding, welding, or other connection methods. The above structure can simplify the device structure, facilitate the processing of the slider 20 and the blocking portion 30, improve processing efficiency, and reduce the processing cost of components.

[0033] In the present application, the guide frame 10 is provided with an avoidance hole, and the slider 20 is passed through the avoidance hole. Through the above structure, the slider 20 is passed through and fixed in the guide frame 10, one end of the slider 20 is located on one side of the guide frame 10, and the other end of the slider 20 is located on the other side of the guide frame 10, so that the guide frame 10 can drive the slider 20 to move horizontally.

[0034] Specifically, the slider 20 includes a main body 21 and a base plate 22. The main body 21 has a cavity, a sealing portion 30 is disposed at the top of the main body 21, and the base plate 22 is annularly disposed at the bottom of the main body 21. The base plate 22 cooperates with the avoidance hole to limit the relative position of the slider 20 and the guide frame 10. The base plate 22 is located on one side of the guide frame 10, and the sealing portion 30 is located on the other side of the guide frame 10. The provision of the base plate 22 improves the wear resistance of the side of the slider 20 with the cavity, and the base plate 22 can also be used to limit the vertical position of the guide frame 10 and the slider 20. The base plate 22 is positioned over one side of the exit passage. The guide frame 10 drives the slider 20 to translate, causing the base plate 22 to move above the exit passage.

[0035] like Figure 2 and Figure 3 As shown, in another embodiment of the present application, a reversing valve is provided, comprising: a valve body 40 and a valve core assembly. The valve body 40 has an inlet channel 41, multiple outlet channels 42, and a chamber 44. The inlet channels 41 and the outlet channels 42 are both connected to the chamber 44. The valve core assembly is the valve core assembly provided in the above-mentioned embodiment, and is movably disposed within the chamber 44. The side of the slider 20 having the cavity is disposed toward the multiple outlet channels 42, and the side of the slider 20 having the blocking portion is disposed toward the inlet channel 41. The blocking portion 30 has a blocking position for blocking the inlet channel 41 and a conducting position for conducting the inlet channel 41.

[0036] The slider 20 has multiple communication positions within the chamber 44. When the slider 20 moves to one of the communication positions, the corresponding outlet channel 42 communicates with the chamber 44, while the other outlet channels 42 are isolated from the chamber 44 by the slider 20. As the slider 20 moves from one communication position to the next, the inlet channel 41 can be blocked by the blocking portion 30. This prevents the multiple outlet channels from communicating with each other during movement of the slider 20, which could result in insufficient pressure supplied by the inlet channel 41 to the capillary tube connected thereto.

[0037] Specifically in this embodiment, the valve body 40 has two outlet channels 42 and a low-pressure channel 43. The two outlet channels 42 and the low-pressure channel 43 are arranged side by side on one side of the valve body 40, and the inlet channel 41 is arranged on the other side of the valve body 40. The low-pressure channel 43 is located between the two outlet channels 42, and the inlet channel 41 is arranged corresponding to the low-pressure channel 43. The sealing portion 30 is located in the middle of the slider 20.

[0038] Among them, the cross-sectional size of the sealing portion 30 is greater than or equal to the size of the inlet channel 41, so that the inlet channel 41 is completely blocked by the sealing portion 30, so as to ensure that the inlet channel 41 can pass the fluid into the capillary when the sealing portion 30 blocks the inlet channel, and ensure that the pistons on both sides of the guide frame 10 are pushed to move by the fluid pressure, thereby enabling the slider 20 to move to the preset position.

[0039] In this embodiment, the slider 20 has a first communication position and a second communication position relative to each other. When the slider 20 moves between the first communication position and the second communication position, the blocking portion 30 can block the inlet channel 41. Figure 2 As shown, at this time, the guide frame 10 and the slider 20 are located on the left side of the chamber 44, the inlet channel 41 is connected to the outlet channel 42 on the right side, and the slider 20 is in the first connection position; when it is necessary to move the guide frame 10 and the slider 20 to the right, the upper pilot valve is controlled to allow the fluid in the capillary connected to the inlet channel 41 to flow into the left side of the chamber 44, so that the fluid can push the piston to move to the right. Figure 3 As shown, when the slider 20 moves to the middle position, the two outlet channels 42 and the low-pressure channel 43 are connected to each other. At this time, the pressure in the chamber 44 is relatively low. By providing a sealing portion 30 and using the sealing portion 30 to seal the inlet channel 41 when the slider 20 moves to the middle, the fluid in the inlet channel 41 can be prevented from leaking into the chamber 44. In this way, the fluid in the inlet channel 41 can all flow to the left side of the chamber 44, 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 10 and the slider 20 to continue to move to the right, so that the cavity cover of the slider 20 is set in the low-pressure channel 43 and the right outlet channel 42, and the left outlet channel 42 is connected to the inlet channel 41. At this time, the slider 20 is in the second connecting position, and the valve body completes the switching operation.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 (40), the valve body having an inlet channel (41), a plurality of outlet channels (42), and a chamber (44), the inlet channel (41) and the outlet channels (42) both being in communication with the chamber (44); A valve core assembly, the valve core assembly comprising a guide frame (10) and a slider (20), the guide frame (10) being drivingly connected to the slider (20), one side of the slider (20) having a cavity, the other side of the slider (20) being provided with a blocking portion (30), the blocking portion (30) having a top surface and a bottom surface arranged opposite to each other, the top surface of the blocking portion (30) being used to block the inlet channel (41), the bottom surface being an arc-shaped surface, the bottom surface being adapted to the upper surface of the slider (20), and the bottom surface of the blocking portion (30) being connected to the slider (20); The valve core assembly is movably arranged in the chamber (44), a side of the slider (20) of the valve core assembly having a cavity is arranged toward the plurality of outlet channels (42), and a side of the slider (20) having a blocking portion is arranged toward the inlet channel (41), and the blocking portion (30) has a blocking position for blocking the inlet channel and a conducting position for conducting the inlet channel; During the process of the slider (20) switching the plurality of outlet channels (42), the blocking portion (30) blocks the inlet channel (41); The guide frame (10) has a relief hole, and the sliding block (20) is inserted into the relief hole.

2. The reversing valve according to claim 1, characterized in that: The surface of the blocking portion (30) close to the inlet channel is an arc-shaped structure.

3. The reversing valve according to claim 1, characterized in that: The surface of the blocking portion (30) close to the inlet channel is a planar structure.

4. The reversing valve according to claim 1, characterized in that: The blocking portion (30) and the slider (20) are an integrally formed structure.

5. The reversing valve according to claim 1, characterized in that: The slider (20) includes a main body (21) and a bottom plate (22), wherein the main body (21) has a cavity, the blocking portion (30) is arranged at the top of the main body (21), and the bottom plate (22) is annularly arranged at the bottom of the main body (21), and the bottom plate (22) cooperates with the avoidance hole to limit the relative position of the slider (20) and the guide frame (10), the bottom plate (22) is located on one side of the guide frame (10), and the blocking portion (30) is located on the other side of the guide frame (10).

6. The reversing valve according to claim 1, characterized in that: The valve body (40) has two outlet channels (42) and a low-pressure channel (43), and the two outlet channels (42) and the low-pressure channel (43) are arranged side by side on one side of the valve body (40). The inlet channel (41) is arranged on the other side of the valve body (40), and the low-pressure channel (43) is located between the two outlet channels (42). The inlet channel (41) is arranged corresponding to the low-pressure channel (43), and the blocking portion (30) is located in the middle of the slider (20).

7. The reversing valve according to claim 1, characterized in that: The cross-sectional size of the blocking portion (30) is greater than or equal to the size of the inlet channel (41).

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