Electromagnetic reversing valve

Abstract

The application discloses an electromagnetic reversing valve, comprising a pilot valve support for mounting a pilot valve of the electromagnetic reversing valve, a first side plate part and a second side plate part are oppositely arranged, and the two are connected through a connecting part and have a spacing; at least one of the first side plate part and the second side plate part is provided with a small clamping jaw and a large clamping jaw which are formed by extending from a plate base body, a pilot valve containing groove is formed between the small and large clamping jaws, and part of the pilot valve is located in the pilot valve containing groove; the small clamping jaw is provided with a material removal part at a position thereof; the pilot valve comprises a first clamping position and a second clamping position; when being at the first clamping position, the pilot valve containing groove and a mounting surface of the pilot valve are in clearance fit; when being at the second clamping position, at least the small clamping jaw is deformed under the action of an external force, and the pilot valve containing groove and the mounting surface of the pilot valve constitute an interference fit. The electromagnetic reversing valve has simple and reliable structure, high assembly process, and can effectively improve the vibration resistance of the pilot valve.

Description

Technical Field

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

[0002] Four-way reversing valves are mainly used in systems such as heat pump air conditioners and water heaters to switch the refrigerant flow path in the system, thereby enabling the entire system to perform functions such as cooling, heating, and defrosting. Figure 8 This illustrates the overall structure of a typical four-way directional valve, with its pilot valve 10 passing through... Figure 9 The bracket 20 shown is connected to the main valve 30. The body of the bracket 20 is fixed on the main valve 30. After the pilot valve 10 is placed in the receiving groove formed by the large claw 201 and the small claw 202 of the bracket 20, force is applied to the outside of the large claw 201, so that the bracket 20 is deformed and bent by force and the pilot valve is fixed. For those skilled in the art, how to make the installation of the bracket and the pilot valve convenient is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an electromagnetic directional valve, which can relatively easily facilitate the installation of the bracket and the pilot valve.

[0004] The electromagnetic directional valve provided by the present invention includes a pilot valve bracket for mounting the electromagnetic directional valve, comprising a first side plate portion, a second side plate portion, and a connecting portion. The first side plate portion and the second side plate portion are disposed opposite to each other, with a gap between them, and are connected by the connecting portion. At least one of the first side plate portion and the second side plate portion is provided with a small claw and a large claw extending from the plate base, and a pilot valve receiving groove is formed between the large claw and the small claw. A portion of the pilot valve is located in the pilot valve receiving groove, and a material removal portion is provided at the location of the small claw. The pilot valve includes a first engagement position and a second engagement position. When in the first engagement position, the pilot valve receiving groove and the mounting surface of the pilot valve are in clearance fit. When in the second engagement position, at least the small claw is deformed by external force, and the pilot valve receiving groove and the mounting surface of the pilot valve form an interference fit.

[0005] Compared to the prior art, the present invention provides a material removal section at the location of the small clamping claw. When force is applied to the small and large clamping claws to rivet the pilot valve, at least the small clamping claw deforms under external force until an interference fit is formed between the pilot valve receiving groove and the mounting surface of the pilot valve. This local deformation clamps the pilot valve body, facilitating assembly operations and making the riveting between the pilot valve and the bracket more secure, thus improving the vibration resistance of the pilot valve. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the pilot valve bracket described in Embodiment 1;

[0007] Figure 2 for Figure 1 The diagram shows the structure after the pilot valve bracket is riveted and fixed to the pilot valve.

[0008] Figure 3 This is a schematic diagram of the pilot valve bracket described in Embodiment 2;

[0009] Figure 4 for Figure 3 The diagram shows the structure after the pilot valve bracket is riveted and fixed to the pilot valve.

[0010] Figure 5 This is a schematic diagram of the pilot valve bracket described in Embodiment 3;

[0011] Figure 6 This is a schematic diagram of the pilot valve bracket described in Embodiment 4;

[0012] Figure 7 for Figure 6 A schematic diagram of the riveted structure of the pilot valve bracket shown in the figure;

[0013] Figure 8 This is a schematic diagram of the overall structure of a typical four-way directional valve as described in the background art.

[0014] Figure 9 for Figure 8 A schematic diagram of the bracket shown.

[0015] In the picture:

[0016] First side plate 1, small claw 11, large claw 12, material removal part 13, material removal part 13′, material removal part 13″, second side plate 2, small claw 21, large claw 22, connecting part 3;

[0017] Pilot valve 10, bracket 20, large clamp 201, small clamp 202, main valve 30. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1:

[0020] Please see Figure 1 This is a schematic diagram of the pilot valve bracket described in this solution. Without loss of generality, this pilot valve is connected to the main valve of the four-way directional valve (not shown in the figure, please refer to [reference needed] for details). Figure 8 Since the arrangement directions are the same, it should be understood that the specific implementation of the pilot valve and the main valve functions is not the core inventive point of this application, and does not constitute a substantial limitation on the technical solution claimed in this application.

[0021] like Figure 1 As shown, the pilot valve bracket includes a first side plate portion 1, a second side plate portion 2, and a connecting portion 3. The first side plate portion 1 and the second side plate portion 2 are arranged opposite to each other and are connected by the connecting portion 3. There is a gap between the first side plate portion 1 and the second side plate portion 2 to form a more stable fixed connection with the pilot valve 10 body. The connecting portion 3 is used for fixed connection with the main valve. To ensure a good fixed connection between the two, the connecting portion 3 is preferably made of... Figure 1 The concave arc surface shown is designed to fit tightly against the outer peripheral surface of the main valve body, and is then welded and fixed accordingly.

[0022] The first side plate 1 has a small claw 11 and a large claw 12 extending from the plate base, and the second side plate 2 has a small claw 21 and a large claw 22 extending from the plate base. A valve receiving groove is formed between the large claws (12, 22) and the corresponding small claws (11, 21). Thus, after the valve 10 is partially placed in the valve receiving groove, a riveting force can be applied to fix the valve to the valve bracket. Alternatively, only one side plate may provide large and small claws for riveting.

[0023] Here, the pilot valve receiving groove and the mounting surface of the pilot valve 10 can form a clearance fit. That is, the diameter of the outer peripheral surface of the pilot valve 10 and the groove width of the pilot valve receiving groove satisfy the clearance (including the minimum clearance equal to zero) fit between the pilot valve 10 and the groove during the disassembly and assembly operation.

[0024] In this design, the pilot valve 10 includes a first locking position and a second locking position. A material removal section 13 is located at the position of the small claw 11 on the first side plate portion 1. When in the first locking position, the pilot valve receiving groove and the mounting surface of the pilot valve 10 are in clearance fit, and the small claw 11 is not subjected to external force. When in the second locking position, at least the small claw 11 is deformed by external force, resulting in an interference fit between the pilot valve receiving groove and the mounting surface of the pilot valve. That is, based on the clearance space formed by the material removal section 13, the pilot valve is reliably fixed to the pilot valve bracket, thereby effectively improving the vibration resistance of the pilot valve. Please refer to [further details omitted]. Figure 2 The image is Figure 1 The diagram shows the structure after the pilot valve bracket is riveted and fixed to the pilot valve.

[0025] Here, the location of the small claw 11 where the material removal part 13 is provided, including the body of the small claw 11 and the connection area between the small claw 11 and its plate substrate, is within the scope of protection claimed in this application as long as the configuration of the material removal part 13 can meet the above-mentioned functional requirements for reliable riveting after deformation.

[0026] It is understandable that a material removal part (not shown in the figure) may also be provided at the location of the small claw 21 of the second side plate portion 2, which can enhance the overall riveting force acting on the pilot valve. That is, at least one of the first side plate portion 1 and the second side plate portion 2 has the material removal part at the location of the small claw.

[0027] In this embodiment, the material removal part 13 is located on the inner side of the guide valve receiving groove of the small claw 11. Specifically, the material removal part 13 is provided at the root of the small claw 11, that is, at a position close to the plate substrate. In this way, the small claw 11 undergoes a relatively large local deformation under force, which further increases the riveting contact area between the deformed claw and the guide valve.

[0028] Combination Figure 1 and Figure 2 As shown, the material removal section 13 is a groove that is obliquely arranged and forms an acute angle with respect to the extension direction of the small claw 11. Here, "groove" means that the geometric center of the groove is set at an acute angle with respect to the extension direction of the small claw 11, that is, the groove is set obliquely as a whole, rather than being limited to the shape of the "groove" itself.

[0029] In this design, the "groove" is specifically a "V"-shaped groove. It has a simple structure and good manufacturability.

[0030] It should be noted that, in addition to the aforementioned selectability of the configuration position, the specific structure of the material removal section 13 can also be determined according to different product designs and process capabilities, such as, but not limited to, the morphology of the material removal section 13 itself.

[0031] Example 2:

[0032] Compared with Embodiment 1, the material removal part 13′ used to form the clearance space in this solution is also located on the inner side of the small claw 11, that is, a groove obliquely set at a position close to the plate substrate; the difference is that the groove is a concave arc groove.

[0033] Please see also Figure 3 and Figure 4 ,in, Figure 3 This is a schematic diagram of the pilot valve bracket described in this solution. Figure 4 for Figure 3 The diagram shows the structure after the pilot valve bracket is riveted and fixed to the pilot valve. To clearly show the differences and connections between this solution and the embodiment, components and structures with the same function are indicated by the same markings in the figure.

[0034] The other components and connections are the same as in Embodiment 1, and will not be repeated here.

[0035] Example 3:

[0036] In both Embodiment 1 and Embodiment 2 above, the material removal section is provided in a specific way from the perspective of providing sufficient clearance space to meet the requirements of riveting.

[0037] Compared to embodiments one and two, the material removal section 13" of the valve guide bracket in this solution is located on the outer side of the small clamp 11. This material removal section 13" provides a solution from the perspective of meeting the deformation capacity required for riveting. Please refer to... Figure 5 The figure is a schematic diagram of the pilot valve bracket described in this solution.

[0038] Specifically, the material removal section 13" extends from the end of the small claw 11. It should be understood that the strip-shaped material removal section 13" shown in the figure is only a preferred example and not a limitation on the material removal section located on the outer side of the small claw 11.

[0039] The other components and connections are the same as in the aforementioned embodiments, and will not be repeated here.

[0040] Example 4:

[0041] The valve support provided in this solution has the same main structure as the valve support described in the previous embodiment. Please refer to... Figure 6 and Figure 7 ,in, Figure 6 This is a schematic diagram of the pilot valve bracket described in this solution. Figure 7 for Figure 6 The diagram shows the structure of the pilot valve bracket after riveting. To clearly illustrate the differences and connections between this solution and the embodiments, components and structures with the same function are shown with the same markings in the diagram.

[0042] In this design, a circular hole 15 is formed on the base 14 of one of the first side plate portion 1 and the second side plate portion 2. The pilot valve is pre-installed in the pilot valve receiving groove of the bracket. After applying force to deform the large and / or small jaws, the pilot valve is riveted. At this time, a matching punch is used to press the circular hole 15. Figure 7 As shown, the straight section at the upper end of the extruded base 14 deforms and protrudes, changing the clearance fit between the pilot valve and the pilot valve receiving groove into a small interference fit, thereby making the relative positional relationship between the pilot valve and the bracket more reliable and improving the vibration resistance of the pilot valve.

[0043] Here, in order to prevent the pilot valve from generating an off-center load under the action of the deformed protrusion at the upper end of the base 14, the circular hole 15 is preferably centered relative to the upper end of the base 14. Other configurations and connections are the same as in the aforementioned embodiment, and will not be repeated here.

[0044] In addition to the aforementioned pilot valve bracket, this embodiment also provides a four-way directional valve, including a main valve and a pilot valve, wherein the pilot valve is fixed to the main valve using the aforementioned pilot valve bracket. It should be understood that the specific implementation of the main valve and pilot valve of this four-way directional valve is not the core inventive point of this application, and those skilled in the art can implement it based on existing technology; therefore, it will not be described in detail here.

[0045] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An electromagnetic directional valve, characterized in that, The device includes a pilot valve bracket for mounting a solenoid directional valve, comprising a first side plate, a second side plate, and a connecting portion. The first side plate and the second side plate are disposed opposite to each other, with a gap between them. The first side plate and the second side plate are connected by the connecting portion. At least one of the first side plate portion and the second side plate portion is provided with a small claw and a large claw for riveting extending from the plate base. A guide valve receiving groove is formed between the large claw and the small claw. Part of the guide valve is located in the guide valve receiving groove. A material removal part is provided at the location of the small claw. The material removal part forms a clearance space. The pilot valve includes a first locking position and a second locking position. When it is in the first locking position, the pilot valve receiving groove and the mounting surface of the pilot valve are in clearance fit. When it is in the second locking position, at least the small claw is deformed by external force, and the pilot valve receiving groove and the mounting surface of the pilot valve are in interference fit.

2. The electromagnetic directional valve according to claim 1, characterized in that, The material removal section is located on the inner side of the small chuck forming the guide valve receiving groove.

3. The electromagnetic directional valve according to claim 2, characterized in that, The material removal section is located at the root of the small chuck.

4. The electromagnetic directional valve according to claim 3, characterized in that, The material removal section is a groove that is obliquely arranged and forms an acute angle with respect to the extension direction of the small claw.

5. The electromagnetic directional valve according to claim 4, characterized in that, The groove is a "V" shaped groove.

6. The electromagnetic directional valve according to claim 3, characterized in that, The groove is an inwardly concave arc-shaped groove.

7. The electromagnetic directional valve according to claim 1, characterized in that, The material removal section is located on the outer side of the small chuck.

8. The electromagnetic directional valve according to claim 7, characterized in that, The material removal section extends from the end of the small chuck.

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