Semi-assembly structure of electronic expansion valve

Abstract

The utility model relates to the technical field of electronic expansion valves, in particular to a semi-assembly structure of an electronic expansion valve, which is characterized in that a valve body is mounted at a working position, a medium flows through the valve body, and then the flow in the valve body is adjusted by adjusting the height of a valve needle component upwards or downwards, so that the practicability of equipment is improved; comprising a valve body; the valve needle assembly is mounted on the valve body; the valve body is matched with the valve needle assembly to control the flow in the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a semi-assembly structure of an electronic expansion valve. Background Technique

[0002] An electronic expansion valve is a device used to control the flow of refrigerant, usually used in refrigeration and air conditioning systems. Existing electronic expansion valves, such as those disclosed in the utility model patent with the publication number CN215891132U and the invention patent with the publication number CN113446405A, can all achieve flow regulation.

[0003] However, it is found in the processing process that the existing assembly steps of electronic expansion valves are cumbersome, affecting production efficiency. In the use process, it is found that the existing electronic expansion valves have poor stability and poor flexibility when adjusting the flow rate. Therefore, there is an urgent need for a semi-assembly structure of an electronic expansion valve to improve the above problems. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a semi-assembly structure of an electronic expansion valve, which installs the valve body in the working position, allows the medium to flow through the valve body, and then adjusts the height of the valve needle assembly up or down to adjust the flow rate in the valve body, thereby improving the practicability of the equipment.

[0005] A semi-assembly structure of an electronic expansion valve of the utility model includes a valve body; it also includes a valve needle assembly, and the valve needle assembly is installed on the valve body;

[0006] The valve body cooperates with the valve needle assembly to control the flow rate in the valve body;

[0007] Install the valve body in the working position, allow the medium to flow through the valve body, and then adjust the height of the valve needle assembly up or down to adjust the flow rate in the valve body, thereby improving the practicability of the equipment.

[0008] Preferably, the valve body includes a valve seat and a valve base. The top of the valve base is press-fitted into the bottom of the valve seat, and the valve base and the valve seat are welded. The bottom of the valve base is provided with an inlet and an outlet; the medium flows through the inlet and outlet of the valve base, and the valve seat cooperates with the valve base to guide the valve needle assembly. Then, by adjusting the height of the valve needle assembly up or down, the flow rate in the valve base is controlled, thereby improving the stability of the electronic expansion valve for flow regulation.

[0009] Preferably, the top of the valve base is provided with a first card slot and a second card slot, and the first card slot is located above the second card slot. A sealing ring is arranged inside the second card slot; after the valve seat and the valve base are installed together, the sealing ring seals the inlet of the valve base and the valve needle, thereby improving the sealing effect inside the valve body.

[0010] Preferably, the valve needle assembly includes a screw, a valve needle sleeve, a bushing, and a valve needle. The first end of the screw passes through the valve needle sleeve and extends deep into the valve needle, where it is press-fitted and welded to the bushing. An elastic member is provided between the valve needle and the bushing, and the valve needle sleeve is press-fitted and welded to the valve needle. The bottom end of the valve needle is inserted into the interior of the valve base. Through the transmission of the screw and the elasticity of the elastic member, the valve needle is pushed downward to close the valve port, or through the transmission of the screw and the upward pulling of the valve needle sleeve by the bushing, the valve needle is moved upward to open the valve port, thereby adjusting the flow rate inside the valve base, improving the convenience of flow rate adjustment of the valve needle assembly, and enhancing the overall operating stability of the valve body.

[0011] Preferably, an exhaust passage is provided inside the valve needle. A first vent hole is provided at the top of the valve needle, and a second vent hole is provided at the side of the valve needle. The first vent hole is communicated with the second vent hole, facilitating the rapid balancing of the air pressure at the inlet and inside the valve body when the valve opens under high pressure, thereby enhancing the overall operating stability of the electronic expansion valve.

[0012] A step is provided on the valve needle. The baffle is press-fitted into the first card slot for welding. The valve seat is provided with a first guiding section and the valve base is provided with a second guiding section, and both the first guiding section and the second guiding section guide the valve needle. When the screw drives the valve needle to move downward, the first guiding section and the second guiding section can effectively improve the running concentricity of the valve needle and enhance the sealing effect of the valve body. When the valve needle completely closes the interior of the valve base, due to the elasticity of the elastic member, the step presses the baffle downward to seal the gap between the valve needle and the valve seat, thereby improving the sealing effect of the valve needle.

[0013] Preferably, it further includes an auxiliary spring. The auxiliary spring is installed inside the valve seat, and the bottom end of the auxiliary spring contacts the step on the valve needle, and the top end of the auxiliary spring contacts the top inside the valve seat. By adding the auxiliary spring, the torque requirement for the stepper motor when the valve body closes can be effectively reduced, thereby reducing the volume of the stepper motor, ultimately achieving the reduction of the overall cost of the electronic expansion valve and the reduction of the installation space.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By guiding the valve needle through the valve seat and the valve base, the stability of the valve needle during up and down movement is improved;

[0016] 2. The valve needle has a simple structure and adopts an integrated design, which is convenient for assembly and reduces the assembly process;

[0017] 3. A decoupling structure is formed between the valve needle and the screw through the valve needle sleeve and the bushing, improving the flexible adjustability of the flow control mechanism, and enhancing the stability and durability of the equipment;

[0018] 4. High structural integration, more convenient assembly, which is conducive to lightweight and cost reduction. Brief Description of the Drawings

[0019] Figure 1 is an isometric structural schematic diagram of the present utility model;

[0020] Figure 2 is a front elevation sectional structural schematic diagram of the present utility model;

[0021] Figure 3 is an isometric exploded structural schematic diagram of the present utility model;

[0022] Figure 4 is a front elevation exploded structural schematic diagram of the present utility model.

[0023] Reference numerals in the drawings: 1, valve seat; 2, valve base; 3, sealing ring; 4, screw; 5, valve needle sleeve; 6, bushing; 7, valve needle; 8, elastic member; 9, step; 10, baffle; 11, auxiliary spring. Detailed Description of the Preferred Embodiments

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0025] Embodiment 1

[0026] An electronic expansion valve semi-assembly structure includes a valve body; it further includes a valve needle assembly, and the valve needle assembly is installed on the valve body;

[0027] The valve body cooperates with the valve needle assembly to control the flow rate inside the valve body;

[0028] The valve body includes a valve seat 1 and a valve base 2. The top of the valve base 2 is press-fitted into the bottom of the valve seat 1, and the valve base 2 and the valve seat 1 are welded. An inlet and an outlet are provided at the bottom of the valve base 2;

[0029] The top of the valve base 2 is provided with a first card slot and a second card slot, and the first card slot is located above the second card slot. A sealing ring 3 is arranged inside the second card slot;

[0030] The valve needle assembly includes a screw 4, a valve needle sleeve 5, a bushing 6 and a valve needle 7. The first end of the screw 4 passes through the valve needle sleeve 5 and extends into the valve needle 7 and is press-fitted and welded with the bushing 6. An elastic member 8 is arranged between the valve needle 7 and the bushing 48. The valve needle sleeve 5 is press-fitted and welded with the valve needle 7;

[0031] An exhaust passage is provided inside the valve needle 7. A first vent hole is provided at the top of the valve needle 7, and a second vent hole is provided at the side of the valve needle 7. The first vent hole is communicated with the second vent hole;

[0032] A step 9 is provided on the valve needle 7. The baffle 10 is press-fitted into the first card slot for welding. The valve seat is provided with a first guiding section and the valve base is provided with a second guiding section, and both the first guiding section and the second guiding section guide the valve needle 7;

[0033] Insert the bottom end of the valve needle 7 into the inside of the valve base 2, drive it through the screw 4, and through the elasticity of the elastic member 8, squeeze the valve needle 7 downward, and guide the valve needle 7 through the valve seat 1 and the valve base 2, so that the valve needle 7 moves downward, or drive it through the screw 4, pull the valve needle sleeve 5 upward through the bushing 6, and guide the valve needle 7 through the valve seat 1 and the valve base 2, so that the valve needle 7 moves upward to adjust the flow rate inside the valve base 2. And during the process of adjusting the flow rate, through the exhaust passage inside the valve needle 7, the perforation at the top of the valve needle 7 adjusts the air pressure inside the valve base 2. When the valve needle 7 completely closes the inside of the valve base 2, through the elasticity of the elastic member 8, the step 9 squeezes the baffle 10 downward to seal the gap between the valve needle 7 and the valve seat 1, thereby improving the practicability of the equipment.

[0034] Embodiment 2

[0035] As Figures 1 to 4 shown, a semi-assembly structure of an electronic expansion valve includes a valve body; it further includes a valve needle assembly, and the valve needle assembly is installed on the valve body;

[0036] The valve body and the valve needle assembly cooperate to control the flow rate inside the valve body;

[0037] The valve body includes a valve seat 1 and a valve base 2. The top of the valve base 2 is press-fitted into the bottom of the valve seat 1 in an interference fit, and the valve base 2 and the valve seat 1 are welded. An inlet and an outlet are provided at the bottom of the valve base 2;

[0038] The top of the valve base 2 is provided with a first card slot and a second card slot, and the first card slot is located above the second card slot. A sealing ring 3 is provided inside the second card slot;

[0039] The valve needle assembly includes a screw 4, a valve needle sleeve 5, a bushing 6 and a valve needle 7. The first end of the screw 4 passes through the valve needle sleeve 5 and extends into the inside of the valve needle 7 to be press-fitted and welded with the bushing 6. An elastic member 8 is provided between the valve needle 7 and the bushing 48. The valve needle sleeve 5 is press-fitted and welded with the valve needle 7; the elastic member is a spring;

[0040] An exhaust passage is provided inside the valve needle 7. A first vent hole is provided at the top of the valve needle 7, and a second vent hole is provided at the side of the valve needle 7. The first vent hole is communicated with the second vent hole;

[0041] A step 9 is provided on the valve needle 7, and the baffle 10 is press-fitted into the first card slot for welding. The valve seat is provided with a first guiding section and the valve base is provided with a second guiding section, and both the first guiding section and the second guiding section guide the valve needle 7;

[0042] It further includes an auxiliary spring 11. The auxiliary spring 11 is installed inside the valve seat 1, and the bottom end of the auxiliary spring 11 contacts the step 9 on the valve needle 7, and the top of the auxiliary spring 11 contacts the top inside the valve seat 1;

[0043] Insert the bottom end of the valve needle 7 into the inside of the valve base 2, drive it through the screw 4, and through the elasticity of the elastic member 8, squeeze the valve needle 7 downward, and guide the valve needle 7 through the valve seat 1 and the valve base 2 to make the valve needle 7 move downward, or drive it through the screw 4, pull the valve needle sleeve 5 upward through the bushing 6, and guide the valve needle 7 through the valve seat 1 and the valve base 2 to make the valve needle 7 move upward to adjust the flow rate inside the valve base 2. And during the process of adjusting the flow rate, through the exhaust passage inside the valve needle 7, the perforation at the top of the valve needle 7 adjusts the air pressure inside the valve base 2. When the valve needle 7 completely closes the inside of the valve base 2, through the elasticity of the auxiliary spring 11 cooperating with the elasticity of the elastic member 8, the step 9 squeezes the baffle 10 downward to seal the gap between the valve needle 7 and the valve seat 1, thereby improving the practicability of the equipment.

[0044] The valve seat 1 and the valve base 2 of a semi-assembly structure of an electronic expansion valve of the present utility model are purchased on the market. Those skilled in the industry only need to install and operate according to the attached instruction manual, without the need for creative labor from those skilled in the art.

[0045] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. An electronic expansion valve semi-assembly structure, comprising a valve body; characterized in that: Also included is a valve needle assembly, which is mounted on the valve body; The valve body and the valve needle assembly cooperate to control the flow in the valve body; The valve needle assembly comprises a screw rod (4), a valve needle sleeve (5), a bushing (6) and a valve needle (7); the first end of the screw rod (4) passes through the valve needle sleeve (5) and penetrates into the interior of the valve needle (7) to be press-fitted and welded to the bushing (6); an elastic member (8) is provided between the valve needle (7) and the bushing (6); the valve needle sleeve (5) and the valve needle (7) are press-fitted and welded; An exhaust passage is provided inside the valve needle (7), a first vent hole is provided on the top of the valve needle (7), a second vent hole is provided on the side of the valve needle (7), and the first vent hole is connected to the second vent hole; The valve needle (7) is provided with a step (9), the baffle (10) is press-fitted into the first slot for welding, the valve seat is provided with a first guide section and the valve base is provided with a second guide section, and both the first guide section and the second guide section guide the valve needle (7).

2. An electronic expansion valve semi-assembly structure as claimed in claim 1, characterized in that: The valve body comprises a valve seat (1) and a valve base (2); the top of the valve base (2) is interference-fitted into the bottom of the valve seat (1); the valve base (2) and the valve seat (1) are welded; and the bottom of the valve base (2) is provided with an inlet and an outlet.

3. An electronic expansion valve semi-assembly structure as claimed in claim 2, characterized in that: A first card slot and a second card slot are provided on the top of the valve base (2), wherein the first card slot is located above the second card slot, and a sealing ring (3) is provided inside the second card slot.

4. The electronic expansion valve semi-assembly structure according to claim 1, characterized in that: It also includes an auxiliary spring (11), which is installed inside the valve seat (1), and the bottom end of the auxiliary spring (11) contacts the step (9) on the valve needle (7), and the top of the auxiliary spring (11) contacts the top inside the valve seat (1).

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