Sliding block and four-way valve having the same

Abstract

A sliding block and a four-way valve having the same. The sliding block is a lining assembly (10) including a lining body (11) and a support pin (12). The lining body (11) has a concave groove (111). The support pin (12) is attached to the groove mouth portion of the concave groove (111). The support pin (12) is located in the middle of the groove mouth and divides the concave groove (111) into a first positioning area (1111) and a second positioning area (1112) for use in injection molding positioning. The lining assembly (10), and an injection molding layer (20) that is adhered to the lining body (11) by injection molding and is positioned by the first positioning area (1111) and the second positioning area (1112) during injection molding. The support pin (12) is press-fitted and mounted at the groove mouth of the concave groove (111), and both ends of the support pin (12) are closely connected to the inner wall of the concave groove (111). According to this technical solution, the technical problem that the processing of the support pin existing in the sliding block in the prior art is relatively difficult can be solved.

Description

Technical Field

[0001] This application claims the priority of a patent application filed with the China National Intellectual Property Administration on July 29, 2022, with an application number of 202221985366.5 and an application title of "Sliding Block and Four-way Valve Having the Same".

[0002] This application relates to the technical field of four-way valves, and more specifically, to sliding blocks and four-way valves having the same.

Background Art

[0003] Currently, four-way valves are widely used in refrigeration technologies in the prior art. The four-way valve is mainly used to switch the operating mode by changing the flow direction of the refrigerant, so as to realize the switching between the refrigeration mode and the heating mode. The four-way valve in the prior art includes a sliding block, the sliding block has concave grooves, and support pins are attached to the concave groove portions, and the sliding block conducts the refrigerant.

[0004] However, as shown in FIG. 9, in the prior art, in order to simply attach the support pins in the latter half, support pin guide grooves are formed in the sliding block after injection molding, and at the same time, support pin positioning grooves are provided in the lining. When manufacturing the sliding block of the four-way valve, first, the lining is placed in an injection molding mold and injection molded to obtain a set of the sliding block and the lining, and then the support pins are press-fitted into the support pin positioning grooves along the support pin guide grooves.

[0005] The problems with existing sliding blocks are as follows: 1. Machining the support pins is relatively difficult, and the concentricity requirement between the support pin tip and the support pin column is relatively high during machining, resulting in relatively high demands on equipment and cutting tools. 2. Support pin guide grooves are essential for sliding blocks and affect the overall strength of the sliding block. 3. Due to the presence of support pin guide grooves, there is a high risk of the support pins falling out during use. 4. The final step in manufacturing is the insertion of the support pins, which carries the risk of damaging the sealing surface of the sliding block. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The main objective of this invention is to provide a sliding block and a four-way valve having the same, in order to solve the technical problem that the machining of support pins present in existing sliding blocks is relatively difficult. [Means for solving the problem]

[0007] To achieve the above objective, a sliding block is provided based on one aspect of the present application, comprising a lining assembly including a lining body and support pins, wherein the lining body has a groove, the support pins are attached to the groove openings, the support pins are located in the middle of the groove openings, and the groove is divided into a first positioning area and a second positioning area used for injection molding positioning, and an injection-molded layer which is attached to the lining body by injection molding and is positioned by the first positioning area and the second positioning area during injection molding, wherein the support pins are press-fitted into the groove openings and welded to the inner wall of the groove.

[0008] Furthermore, the lining body includes a substrate and a connecting plate connected to the substrate, the connecting plate being formed to surround the groove, the substrate being installed to surround the periphery of the groove opening, and the injection-molded layer including a first injection-molded section and a second injection-molded section connected to each other, the first injection-molded section being injection-molded on the connecting plate and positioned outside the groove, and the second injection-molded section being injection-molded on the substrate and installed to enclose the substrate.

[0009] Furthermore, the side of the support pin closest to the groove opening is positioned away from the bottom surface of the substrate, while the side of the support pin closest to the groove opening is located within the groove opening.

[0010] Furthermore, the substrate has a first and second surface that are positioned opposite each other, the first and second surfaces are connected to the outer wall of a groove, and injection molding communication holes are provided in the substrate, with the injection molding communication holes penetrating the first and second surfaces.

[0011] Furthermore, the distance between the side of the support pin closest to the groove and the second plate surface is H, where 0.2 mm ≤ H ≤ 0.8 mm.

[0012] Furthermore, the side of the support pin closest to the groove is flat.

[0013] Furthermore, the side of the support pin that is spaced away from the groove is an arcuate surface.

[0014] Furthermore, the support pins have a columnar structure, and the cross-section of the columnar structure is a polygonal face.

[0015] Furthermore, the support pin is cylindrical.

[0016] Furthermore, the support pins are welded to the inner wall of the groove using argon arc welding or laser welding.

[0017] Based on another aspect of the present application, a four-way valve including the sliding block provided above is provided.

[0018] When the present invention's technical solution is applied, the support pin is press-fitted into the groove opening of the recess, and both ends of the support pin are tightly connected to the inner wall of the recess. This simplifies the installation of the support pin, eliminates the need to install a positioning groove at the groove opening of the recess, and further eliminates the need to install a structure on the support pin that engages with the positioning groove. As a result, the manufacturing process for the support pin and the lining body is simplified, the difficulty of processing the sliding block is reduced, and since the lining body and support pin are further subjected to an injection molding process after connection, there is no need to form a support pin guide groove during the injection molding process, the overall strength of the sliding block is improved, and the support pin is prevented from falling out during use.

[0019] The drawings attached to the specification, which constitute part of this application, are provided for further understanding of this application. The schematic embodiments and their descriptions are for interpretive purposes only and do not constitute an unreasonable limitation of this application. The attached drawings are as follows. [Brief explanation of the drawing]

[0020] [Figure 1] This is a schematic diagram of the structure of a lining assembly provided based on an embodiment of the present application. [Figure 2] This is a schematic diagram of the structure of the lining body provided based on the embodiment of the present application. [Figure 3] This is a schematic diagram of the structure of a support pin provided based on an embodiment of the present invention. [Figure 4] This is a cross-sectional view of a sliding block provided according to an embodiment of the present application. [Figure 5] This is a schematic diagram of the structure of a sliding block provided based on an embodiment of the present application. [Figure 6] This is a schematic diagram of the structure of a support pin having a triangular cross-section provided according to an embodiment of the present application. [Figure 7] This is a schematic diagram of the structure of a support pin having a circular cross-section provided based on an embodiment of the present application. [Figure 8] This is a schematic diagram of the structure of an injection molding mold provided based on an embodiment of the present application. [Figure 9] It is a schematic structural view of a sliding block in the prior art.

Embodiments for Carrying out the Invention

[0021] In addition, when there is no interference, the embodiments in the present application and the features within the embodiments can be combined with each other. In the following, the present application will be described in detail with reference to the accompanying drawings and by combining the embodiments.

[0022] As shown in FIGS. 1 to 7, Embodiment 1 of the present application provides a sliding block, which includes a lining assembly 10 and an injection molding layer 20. The lining assembly 10 includes a lining body 11 and a support pin 12. The lining body 11 has a concave groove 111. The support pin 12 is attached to the groove opening of the concave groove 111. The support pin 12 is located at the middle of the groove opening and divides the concave groove 111 into a first positioning area 1111 and a second positioning area 1112 for use in injection molding positioning. The injection molding layer 20 adheres to the lining body 11 by injection molding and is positioned by the first positioning area 1111 and the second positioning area 1112 during injection molding. The support pin 12 is press-fitted and mounted at the groove opening of the concave groove 111.

[0023] In this embodiment, the sliding block is press-fitted into the groove opening of the recessed groove 111, and both ends of the support pin 12 are tightly connected to the inner wall of the recessed groove 111. This simplifies the installation of the support pin 12, eliminates the need to install a positioning groove at the groove opening of the recessed groove 111, and further eliminates the need to install a structure on the support pin 12 that engages with the positioning groove. As a result, the manufacturing process of the support pin 12 and the lining body 11 is simplified, and the difficulty of processing the sliding block is reduced. Therefore, the technical solution provided in this embodiment can solve the technical problem of the relatively complex processing difficulty of the support pins present in existing sliding blocks. In this embodiment, an injection molding process is further carried out on the lining body and support pin 12 after connection. As a result, it is not necessary to form a support pin guide groove (for example, the sliding block structure in existing technology shown in Figure 9) during the injection molding process, the overall strength of the sliding block is improved, and the support pin does not fall out during use.

[0024] Specifically, the support pin 12 can be welded to the inner wall of the groove 111 to improve the installation stability of the support pin 12.

[0025] In this context, the statement that the support pin 12 is located in the middle of the groove does not mean that the support pin 12 is located exactly in the middle of the groove. Rather, it means that the support pin 12 can be located in the middle of the groove or at a location within a certain distance range from the middle of the groove, so that the recessed groove 111 can be easily divided into a first positioning area 1111 and a second positioning area 1112.

[0026] As shown in Figure 8, the injection molding mold 30 includes a first mold 31 and a second mold 32. The second mold 32 is equipped with a first positioning projection 321 and a second positioning projection 322, which are spaced apart from each other. The first positioning projection 321 is located within the first positioning area 1111, and the second positioning projection 322 is located within the second positioning area 1112. The support pin 12 is locked and installed between the first positioning projection 321 and the second positioning projection 322. As a result, the lining assembly 10 is easily positioned, easily and smoothly injection molded, and the stability of the injection molding is improved. At the same time, by adopting such a structural installation, the structural strength of the lining body 11 is not affected even if positioning structures such as positioning projections, positioning grooves, or positioning holes are not installed on the lining body 11, and the pressure resistance strength of the lining body 11 is effectively guaranteed. Specifically, a first channel 301 and a second channel 302 are further installed in the injection molding mold 30, and injection molding of the injection molding layer 20 is achieved via the first channel 301 and the second channel 302.

[0027] In this embodiment, the lining body 11 includes a substrate 112 and a connecting plate 113 connected to the substrate 112. The connecting plate 113 is formed to surround a groove 111, and the substrate 112 is installed to surround the periphery of the groove opening of the groove 111. The injection-molded layer 20 includes a first injection-molded section 21 and a second injection-molded section 22 that are connected to each other. The first injection-molded section 21 is injection-molded on the connecting plate 113 and is positioned outside the groove 111, while the second injection-molded section 22 is injection-molded on the substrate 112 and is installed to enclose the substrate 112. With this structure, during injection molding, some of the injection-molded fluid flows into the connecting plate 113 and forms the first injection-molded section 21 located outside the groove 111, while another portion of the injection-molded fluid flows above and below the substrate 112 to enclose it. By adopting such an injection molding structure, the connection method between the lining body 11 and the injection-molded layer 20 can be easily optimized, and the injection-molded layer 20 is stably injection-molded and installed on the lining body 11.

[0028] Specifically, when the lining assembly 10 is attached to the injection molding mold, both of the plate surfaces of the substrate 112 are positioned away from the injection molding mold, and the injection molding fluid smoothly envelops and installs the substrate 112, thereby optimizing the injection molding structure of the injection molding layer 20.

[0029] In this embodiment, the side of the support pin 12 closest to the groove opening of the groove 111 is positioned away from the bottom surface of the substrate 112, while the side of the support pin 12 closest to the groove opening of the groove 111 is located inside the groove opening. By adopting such a structure, it is possible to avoid a situation where the injection molding fluid does not flow into the groove 111 during injection molding.

[0030] In this embodiment, the substrate 112 has a first and second plate surface that are placed opposite each other, the first and second plate surfaces are connected to the outer wall of the groove 111, and an injection molding communication hole 1121 is installed in the substrate 112, and the injection molding communication hole 1121 is installed through the first and second plate surfaces. By adopting such a structure, during injection molding, the injection molding fluid flows smoothly into the first and second plate surfaces through the injection molding communication hole 1121, making it easier for the injection molding fluid to envelop the substrate 112, and improving the uniformity of injection molding.

[0031] Specifically, the distance between the side of the support pin 12 closest to the groove opening and the second plate surface is H, where 0.2 mm ≤ H ≤ 0.8 mm. By setting H within the above range, it is possible to avoid the support pin 12 becoming excessively tall due to an H value that is too large, which would affect the communication performance with different pipes, and to avoid the injection molding fluid flowing into the groove 111 due to an H value that is too small.

[0032] Specifically, the side of the support pin 12 closest to the groove can be installed as a flat surface. By adopting such a structure, the support pin 12 can be easily positioned during injection molding.

[0033] Specifically, the side of the support pin 12 that is spaced away from the groove can be installed as an arcuate surface. By adopting such a structural installation, the blocking force on the fluid can be easily reduced.

[0034] In one embodiment, the support pin 12 can have a columnar structure, and the cross-section of the columnar structure can be a polygonal or circular face. Adopting such a structure makes processing and manufacturing convenient.

[0035] In another embodiment, the support pin 12 can be cylindrical, which is convenient for manufacturing and processing, and at the same time, the arc-shaped structure of the cylinder also easily reduces the fluid blocking force.

[0036] Specifically, the support pin 12 is welded to the inner wall of the groove 111 using argon arc welding or laser welding, thereby improving the installation stability of the support pin 12.

[0037] Specifically, in this embodiment, the lining body 11 is made of a metal material, while the injection-molded layer 20 is made of a non-metallic material. The metal lining body 11 is advantageous in ensuring the pressure resistance strength of the structure.

[0038] In this embodiment, the lining body 11 can be manufactured by punching and tensile processes, and it is not necessary to install a positioning through-hole structure in the lining body 11 for positioning injection molding. The support pins 12 can be manufactured by punching out irregularly shaped rods.

[0039] The manufacturing process for the sliding block in this embodiment is as follows. First, the lining body 11 and the support pins 12 are manufactured separately. Then, the support pins 12 are press-fitted into the grooves 111 of the lining body 11, and both ends of the support pins 12 are welded to the inner wall of the grooves 111 to form the lining assembly 10. Finally, the lining assembly 10 is placed in an injection molding mold, clamped, and injection molded to obtain the sliding block.

[0040] Embodiment 2 of the present invention provides a four-way valve including a sliding block provided in the above embodiment. In this embodiment, the sliding block engages with the valve seat of the four-way valve and drives the valve seat to reciprocate relative to the valve body, thereby enabling switching of the flow direction of the refrigerant.

[0041] As can be seen from the above explanation, the above embodiment of the present invention achieves the technical advantages of having high pressure resistance of the lining body, being easy to process, and having a stable connection.

[0042] Furthermore, the terminology used herein is solely for the purpose of describing specific embodiments and is not intended to intentionally limit the schematic embodiments based on this application. Where used herein, unless otherwise explicitly indicated elsewhere, the singular form intentionally includes the plural form, and it should be understood that where the terms “contain” and / or “include” are used herein, it explicitly indicates the presence of features, steps, operations, devices, assemblies and / or combinations thereof.

[0043] Unless otherwise specifically described, the relative arrangements, numerical notations, and numerical values ​​of the components and steps described in these embodiments do not limit the scope of this application. At the same time, as is clear, for the sake of simplicity, the dimensions of the parts shown in the accompanying drawings are not drawn to actual scale. While it is possible that art, methods, and apparatus known to those skilled in the art have not been discussed in detail, under appropriate circumstances, such art, methods, and apparatus should be considered part of the authorized specification. In all the examples presented and discussed herein, any specific values ​​should be interpreted as illustrative only and not as limitations. Accordingly, other examples of schematic embodiments may have different values. It should be noted that similar symbols and letters indicate similar items in the following accompanying drawings, so once an item is defined in one accompanying drawing, it is not necessary to discuss it further in subsequent accompanying drawings.

[0044] In the description of this application, it should be understood that the directions or positional relationships indicated by directional terms, such as "front, back, up, down, left, right," "lateral, vertical, perpendicular, horizontal," and "top, bottom," are usually based on the directions or positional relationships shown in the attached drawings. However, these are merely for the purpose of simplifying and simplifying the description of this application, and unless otherwise stated, these directional terms do not indicate or imply that the indicated device or element must have a particular direction or structure and operation in a particular direction. Therefore, they should not be understood as limitations on the scope of protection of this application, and the directional terms "inside, outside" refer to the inside and outside relative to the contour of each member body.

[0045] For the sake of convenience in depiction, spatial relative terms, such as "above," "above," "on the upper surface," and "on the top," may be used here to describe the spatial relationship between one device or feature shown in the drawing and other devices or features. It should be understood here that spatial relative terms also encompass different directions of use or operation, other than the direction in which the device is depicted in the drawing. For example, if the device in the attached drawing is inverted, a device described as "above the other device or structure" or "on top of the other device or structure" would subsequently be positioned "below the other device or structure" or "below the other device or structure." Thus, the exemplary term "above" can include two directions: "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or positioned in other orientations), and the spatial relative depictions used herein can be interpreted accordingly.

[0046] Furthermore, it should be explained here that when terms such as "first" and "second" are used to limit parts and components, they are merely used to distinguish the corresponding parts and components, and unless otherwise stated, these terms do not have any special implications and should not be understood as limitations on the scope of protection of this application.

[0047] The foregoing description is merely a preferred embodiment of the present application and does not limit it. As those skilled in the art will see, the present application is subject to various modifications and changes. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application are all included within the scope of protection. [Explanation of Symbols]

[0048] The attached drawings mentioned above include the following reference numerals: 10 Lining Assembly 11 Lining body 111 Recessed groove 1111 First positioning area 1112 Second positioning area 112 circuit boards 1121 Injection molding communication hole 113 Connecting plate 12 support pins 20 injection molding layer 21 1st injection molding section 22 2nd injection molding section 30 Injection molding molds 31 First mold 32 Second mold 321 First positioning protrusion 322 Second positioning protrusion 301 First channel 302 Second channel

Claims

1. A lining assembly (10) comprising a lining body (11) and support pins (12), wherein the lining body (11) has a groove (111), the support pins (12) are attached to the groove opening of the groove (111), and the support pins (12) are located in the middle of the groove opening, dividing the groove (111) into a first positioning area (1111) and a second positioning area (1112) used for injection molding positioning, The injection-molded layer (20) is attached to the lining body (11) and positioned by the first positioning area (1111) and the second positioning area (1112), and includes The support pin (12) is press-fitted into the groove opening of the groove (111), and both ends of the support pin (12) are tightly connected to the inner wall of the groove (111). The lining body (11) includes a substrate (112) and a connecting plate (113) connected to the substrate (112), the connecting plate (113) is formed to surround the groove (111), the substrate (112) is installed to surround the periphery of the groove opening of the groove (111), the injection-molded layer (20) includes a first injection-molded section (21) and a second injection-molded section (22) connected to each other, the first injection-molded section (21) is located on the connecting plate (113) and outside the groove (111), and the second injection-molded section (22) is installed on the substrate (112) and encloses the substrate (112), The substrate (112) has a first plate surface and a second plate surface that are installed opposite to each other, and the first plate surface and the second plate surface are connected to the outer wall of the groove, A sliding block characterized in that the distance between the side of the support pin (12) closest to the groove and the second plate surface is H, and 0.2 mm ≤ H ≤ 0.8 mm.

2. The sliding block according to claim 1, characterized in that the side of the support pin (12) closest to the groove opening of the recess (111) is installed at a distance from the bottom surface of the substrate (112), and the side of the support pin (12) closest to the groove opening of the recess (111) is located within the groove opening.

3. The sliding block according to claim 1, characterized in that an injection-molded communication hole (1121) is provided in the substrate (112), and the injection-molded communication hole (1121) is provided so as to penetrate the first plate surface and the second plate surface.

4. The sliding block according to claim 1, characterized in that the side of the support pin (12) adjacent to the groove is flat.

5. The sliding block according to claim 1, characterized in that the side of the support pin (12) spaced away from the groove is an arcuate surface.

6. The sliding block according to claim 1, characterized in that the support pin (12) has a columnar structure, and the cross-section of the columnar structure is a polygonal or circular surface.

7. The sliding block according to claim 1, characterized in that the support pin (12) is welded to the inner wall of the groove (111) by argon arc welding or laser welding.

8. A four-way valve characterized by including a sliding block as described in any one of claims 1 to 7.

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