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. Specifically, it relates to a sliding block and a four-way valve 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 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 a concave groove, and a support pin is attached to the concave groove portion, and the sliding block guides the refrigerant.

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

[0005] The problems existing in the sliding block of the prior art are as follows. 1. The processing of the support pin is relatively difficult. During processing, the concentricity requirement between the tip of the support pin and the support pin column is relatively high, and the requirements for equipment and cutting tools during processing are relatively high. 2. The support pin guide groove is essential for the sliding block, which affects the strength of the entire sliding block. 3. Due to the existence of the support pin guide groove, the risk of the support pin falling off during use is high. 4. The final process of manufacturing is the installation of the support pin, and there is a risk of damaging the sealing surface of the sliding block.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The main object of the present application is to provide a sliding block and a four-way valve having the same in order to solve the technical problem that the processing of the support pin existing in the sliding block in the prior art is relatively difficult.

Means for Solving the Problems

[0007] To achieve the above object, based on one aspect of the present application, a sliding block is provided, which is a lining assembly including a lining body and a support pin. The lining body has a concave groove, and the support pin is attached to the groove mouth of the concave groove. The support pin is located in the middle of the groove mouth and divides the concave groove into a first positioning area and a second positioning area used for injection molding positioning. The lining assembly includes an injection molding layer that adheres to the lining body by injection molding and is positioned by the first positioning area and the second positioning area during injection molding. The support pin is press-fitted and mounted into the groove mouth of the concave groove and welded to the inner wall of the concave groove.

[0008] Furthermore, the lining body includes a substrate and a connection plate connected to the substrate. The connection plate is formed to surround a concave groove, the substrate is installed to surround the peripheral edge of the groove opening of the concave groove, the injection molding layer includes a first injection molding part and a second injection molding part that are connected to each other. The first injection molding part is injection molded on the connection plate and is used to be located outside the concave groove, and the second injection molding part is injection molded on the substrate and is used to be installed so as to wrap the substrate.

[0009] Furthermore, the side of the support pin close to the groove opening of the concave groove is installed at a distance from the bottom surface of the substrate, and the side of the support pin close to the groove opening of the concave groove is located inside the groove opening.

[0010] Furthermore, the substrate has a first plate surface and a second plate surface that are oppositely installed. The first plate surface and the second plate surface are connected to the outer wall of the concave groove, and an injection molding communication hole is installed in the substrate. The injection molding communication hole is installed through the first plate surface and the second plate surface.

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

[0012] Furthermore, the side of the support pin close to the groove opening is a flat surface.

[0013] Furthermore, the side of the support pin away from the groove opening is an arc surface.

[0014] Furthermore, the support pin is a columnar structure, and the cross section of the columnar structure is a polygonal surface.

[0015] Furthermore, the support pin is a cylinder.

[0016] Furthermore, the support pin is welded to the inner wall of the concave groove by adopting 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 technical solution of the present application is applied, the support pin is press-fitted and mounted into the groove opening of the concave groove, and both ends of the support pin are closely connected to the inner wall of the concave groove. Thereby, the installation of the support pin becomes simple, there is no need to install a positioning groove at the groove opening of the concave groove, and furthermore, there is no need to install a structure for engaging with the positioning groove on the support pin. Therefore, the manufacturing processes of the support pin and the lining body are simplified, the processing difficulty of the sliding block is reduced, and an injection molding process is further carried out on the lining body and the support pin after connection. Therefore, there is no need to form a support pin guide groove in the injection molding process, the strength of the entire sliding block is improved, and the support pin is avoided from falling off during the use process.

[0019] The accompanying drawings of the specification constituting a part of the present application are provided to further understand the present application. However, the schematic embodiments and their descriptions of the present application are for interpreting the present application and do not constitute an undue limitation to the present application. The accompanying drawings are as follows.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying out the Invention

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

[0022] As shown in FIGS. 1 to 7, Embodiment 1 of the present application provides a sliding block, and the sliding block 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 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 attached to the groove opening of the concave groove 111.

[0023] When the sliding block provided by this embodiment is adopted, the support pin 12 is press-fitted and mounted into the groove opening 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 respectively. Thereby, the installation of the support pin 12 becomes simple, there is no need to install a positioning groove at the groove opening of the concave groove 111, and furthermore, there is no need to install a structure that engages with the positioning groove on the support pin 12. Therefore, the manufacturing process of the support pin 12 and the lining body 11 is simplified, and the processing difficulty of the sliding block is reduced. Therefore, the technical problem that the processing difficulty of the support pin existing in the sliding block in the prior art is relatively complicated can be solved by the technical solution provided by this embodiment. Since this embodiment further performs an injection molding process on the connected lining body and the support pin 12, there is no need to form a support pin guide groove (for example, the sliding block structure in the prior art in FIG. 9) during the injection molding process. The strength of the entire sliding block is improved, and the support pin is prevented from falling off during use.

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

[0025] Note that the statement that the support pin 12 is located in the middle of the groove opening here does not mean that the support pin 12 is located at the exact middle position of the groove opening. Instead, it means that the support pin 12 can be located at the exact middle of the groove opening or at a position having a certain distance range from the exact middle of the groove opening so that the concave groove 111 can be simply divided into the first positioning area 1111 and the second positioning area 1112.

[0026] As shown in FIG. 8, the injection molding mold 30 includes a first mold 31 and a second mold 32. A first positioning protrusion 321 and a second positioning protrusion 322 are installed on the second mold 32. The first positioning protrusion 321 and the second positioning protrusion 322 are installed at a distance from each other. The first positioning protrusion 321 is located within the first positioning area 1111, and the second positioning protrusion 322 is located within the second positioning area 1112. Since the support pin 12 is locked and installed between the first positioning protrusion 321 and the second positioning protrusion 322, the lining assembly 10 can be easily positioned, injection molded simply and smoothly, and the stability of injection molding is improved. At the same time, by adopting such a structure installation, even if no positioning structure such as a positioning protrusion, a positioning groove or a positioning hole for positioning is installed on the lining body 11, it will not affect the structural strength of the lining body 11, and the pressure resistance strength of the lining body 11 is effectively guaranteed. Specifically, a first flow path 301 and a second flow path 302 are further installed in the injection molding mold 30, and injection molding of the injection molding layer 20 is achieved through the first flow path 301 and the second flow path 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 the concave groove 111, and the substrate 112 is installed to surround the peripheral edge of the groove opening of the concave groove 111. The injection molding layer 20 includes a first injection molding part 21 and a second injection molding part 22 connected to each other. The first injection molding part 21 is injection molded on the connecting plate 113 and is used to be located outside the concave groove 111, and the second injection molding part 22 is injection molded on the substrate 112 and is used to be installed to wrap the substrate 112. By adopting such a structure installation, during injection molding, part of the injection molding fluid flows into the connecting plate 113 and forms the first injection molding part 21 located outside the concave groove 111, and another part of the injection fluid flows above and below the substrate 112 and is installed to wrap the substrate. By adopting such an injection molding structure, the connection method between the lining body 11 and the injection molding layer 20 can be easily optimized, and the injection molding 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 two plate surfaces of the substrate 112 are installed at a distance from the injection molding mold, and the injection molding fluid is smoothly installed to wrap the substrate 112, so that the injection molding structure of the injection molding layer 20 is optimized.

[0029] In this embodiment, the side of the support pin 12 close to the groove opening of the concave groove 111 is installed at a distance from the bottom surface of the substrate 112, and the side of the support pin 12 close to the groove opening of the concave groove 111 is located inside the groove opening. By adopting such a structural installation, it is possible to avoid the situation where the injection molding fluid does not flow into the concave groove 111 during injection molding.

[0030] In this embodiment, the substrate 112 has a first plate surface and a second plate surface that are oppositely installed. The first plate surface and the second plate surface are connected to the outer wall of the concave groove 111, and an injection molding communication hole 1121 is installed in the substrate 112. The injection molding communication hole 1121 is installed through the first plate surface and the second plate surface. By adopting such a structural installation, during injection molding, the injection molding fluid can smoothly flow into the positions of the first plate surface and the second plate surface through the injection molding communication hole 1121, making it easier for the injection molding fluid to wrap the substrate 112, and improving the uniformity of injection molding.

[0031] Specifically, the distance between the side of the support pin 12 close to the groove opening and the second plate surface is H, and 0.2 mm ≤ H ≤ 0.8 mm. By setting H within the above range, it is possible to avoid the situation where the height of the support pin 12 becomes excessively high due to an overly large H value and affects the communication performance with different tubes, and it is also possible to avoid the situation where the injection molding fluid flows into the concave groove 111 due to an overly small H value.

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

[0033] Specifically, the side spaced from the groove opening of the support pin 12 can be installed as an arc surface. By adopting such a structural installation, the resistance force against the fluid can be easily reduced.

[0034] In one embodiment, the support pin 12 can be in a columnar structure, and the cross-section of the columnar structure is a polygonal surface or a circle. By adopting such a structural installation, the processing and manufacturing are convenient.

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

[0036] Specifically, the support pin 12 is welded to the inner wall of the concave groove 111 by adopting argon arc welding or laser welding, and the installation stability of the support pin 12 is improved.

[0037] Specifically, the lining body 11 in this embodiment is made of a metal material, and the injection molding layer 20 is made of a non-metal material, which is advantageous for ensuring the pressure resistance strength of the structure by the lining body 11 made of the metal material.

[0038] In this embodiment, the lining body 11 can be manufactured by adopting punching and stretching processing, and there is no need to install a positioning through-hole structure for positioning the injection molding on the lining body 11. The support pin 12 can be manufactured by adopting special-shaped bar punching processing.

[0039] The processing process of the sliding block in this embodiment is as follows. First, the lining body 11 and the support pin 12 are processed respectively. Then, the support pin 12 is press-fitted and installed in the concave groove 111 of the lining body 11, and both ends of the support pin 12 are welded to the inner wall of the concave groove 111 to form a lining assembly 10. Finally, after the lining assembly 10 is placed in an injection molding mold, it is clamped and injection molded to obtain a sliding block.

[0040] In Example 2 of the present application, a four-way valve including the sliding block provided by the above example is provided. The sliding block in this example engages with the valve seat of the four-way valve, and by driving the valve seat to reciprocate relative to the valve body, switching of the flow direction of the refrigerant is realized.

[0041] As can be seen from the above description, the above example of the present application realizes the technical effects that the lining body has high pressure resistance strength, simple processing, and stable connection.

[0042] Note that the terms used herein are merely for describing specific embodiments and are not intended to limit the exemplary embodiments based on the present application. When used herein, unless otherwise clearly indicated in other contexts, the singular form is intended to include the plural form, and it should be further understood that when the terms "comprising" and / or "including" are used in this specification, they indicate 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 members and steps described in these embodiments do not limit the scope of the present application. At the same time, obviously, for the sake of simple description, the dimensions of each part shown in the accompanying drawings are not drawn based on the actual scale. Those skilled in the art may not have examined the known technologies, methods, and devices in detail, but under appropriate circumstances, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the presented and discussed presentation examples here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other presentation examples of the exemplary embodiments can have different values. It should be noted here that since the similar reference signs and alphabets represent similar items in the following accompanying drawings, once an item is defined in one of the accompanying drawings, there is no need to further examine it in the 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, rear, up, down, left, right", "lateral direction, vertical direction, perpendicular, horizontal" and "top, bottom", etc. are usually based on the directions or positional relationships shown in the accompanying drawings, but they are only for the convenience of describing this application and simplifying the description. Unless there are contrary explanations, these directional terms do not indicate and imply that the indicated device or element must have a specific direction or a structure and operation in a specific direction, so it should not be understood as a limitation to the protection scope of this application. The directional terms "inside, outside" refer to the inside and outside with respect to the contour of each member body.

[0045] For the convenience of description, here spatial relative terms such as "above...", "above...", "upper surface of...", "of the upper surface", etc. are used to describe the spatial positional relationship between one device or feature shown in the drawings and other devices or features. What should be understood here is that the spatial relative terms mean that they also include different directions in use or operation except the direction in which the device is depicted in the drawings. For example, if the device in the attached drawings is inverted, the device described as "above another device or structure" or "on another device or structure" will then be positioned as "below another device or structure" or "under another device or structure". Therefore, the exemplary term "above..." can include two directions, "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations), and corresponding interpretations can also be made for the spatial relative descriptions used here.

[0046] Also, it should be noted here that when terms such as "first", "second", etc. are used to limit parts or components, they are only for distinguishing the corresponding parts or components. Unless otherwise stated, these terms have no special implications, so it should not be understood as a limitation to the protection scope of this application.

[0047] The above description is only a preferred embodiment of the present application and does not limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are all included within the protection scope of the present application.

Description of Reference Numerals

[0048] The above-mentioned accompanying drawings include the following reference numerals. 10 Lining Assembly 11 Lining Body 111 Concave Groove 1111 First Positioning Area 1112 Second Positioning Area 112 Substrate 1121 Injection Molding Connecting Hole 113 Connection Plate 12 Support Pin 20 Injection Molding Layer 21 First Injection Molding Part 22 Second Injection Molding Part 30 Injection Molding Mold 31 First Mold 32 Second Mold 321 First Positioning Protrusion 322 Second Positioning Protrusion 301 First Flow Path 302 Second Flow Path

Claims

1. A lining assembly (10) including a lining body (11) and a support pin (12), wherein 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 in the middle of the groove opening, and the concave groove (111) is divided into a first positioning area (1111) and a second positioning area (1112) for use in injection molding positioning, the lining assembly (10); 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, including; The support pin (12) is press-fitted and attached to the groove opening of the concave groove (111), and both ends of the support pin (12) are in close contact with the inner wall of the concave groove (111). A sliding block characterized by this.

2. 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 concave groove (111), the substrate (112) is installed to surround the peripheral edge of the groove opening of the concave groove (111), the injection molding layer (20) includes a first injection molding part (21) and a second injection molding part (22) connected to each other, the first injection molding part (21) is injection molded on the connecting plate (113) and is used to be located outside the concave groove (111), the second injection molding part (22) is injection molded on the substrate (112) and is used to be installed to wrap the substrate (112). The sliding block according to Claim 1, characterized by this.

3. The side of the support pin (12) close to the groove opening of the concave groove (111) is installed at a distance from the bottom surface of the substrate (112), and the side of the support pin (12) close to the groove opening of the concave groove (111) is located within the groove opening. The sliding block according to Claim 2, characterized by this.

4. The substrate (112) has a first plate surface and a second plate surface which are oppositely arranged. The first plate surface and the second plate surface are connected to the outer wall of the concave groove. An injection molding through hole (1121) is provided in the substrate (112), and the injection molding through hole (1121) is provided through the first plate surface and the second plate surface. The sliding block according to claim 2, characterized in that.

5. The distance between the side of the support pin (12) close to the groove opening and the second plate surface is H, and 0.2 mm ≤ H ≤ 0.8 mm. The sliding block according to claim 4, characterized in that.

6. The side of the support pin (12) close to the groove opening is a flat surface. The sliding block according to claim 1, characterized in that.

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

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

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

10. A four-way valve, characterized by including the sliding block according to any one of claims 1 to 9.

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