Electronic expansion valve

Abstract

The utility model discloses an electronic expansion valve relates to solenoid valve technical field. Its technical scheme main points include valve body, first injection molding casing, second injection molding casing, coil assembly, position sensor and PT sensor, the position sensor injection molding is in the first injection molding casing, and / or, the PT sensor injection molding is in the second injection molding casing. The utility model will coil assembly, position sensor, first pin, second pin and third pin injection molding are in the first injection molding casing, will PT sensor injection molding is in the second injection molding casing, after connecting two injection molding casings with valve body, install circuit board to the accommodation cavity, and with each pin connection, finally install apron, can realize assembly to increase sensor waterproof reliability, simplify sensor assembly structure, optimize the space that installation structure occupies, reduce circuit board space redundancy, reduce assembly process simultaneously, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and more specifically, to an electronic expansion valve. Background Technology

[0002] The existing Chinese patent with authorization announcement number CN114439989B discloses an electronic expansion valve, which includes a valve body, a rotor assembly, a valve needle assembly, a coil assembly, an electronic control board, a P / T sensor, an angle sensor, and a sensor mounting box. The P / T sensor is disposed in the sensor mounting box, and the angle sensor is disposed between the electronic control board and the rotor assembly. The angle sensor is plugged into the electronic control board.

[0003] In the aforementioned patent, the angle sensor and P / T sensor are assembled as independent components. Their corresponding electronic control boards are independent and require connectors, increasing the number of parts and assembly steps, and raising overall reliability risks. Furthermore, the airtightness of both independent chambers needs to be tested, potentially revealing numerous potential leaks and requiring improved sealing performance. Additionally, the main electronic control board, to accommodate connections, is larger and more redundant, increasing costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an electronic expansion valve. This valve integrates a coil assembly, a position sensor, a first pin, a second pin, and a third pin into a first injection-molded housing. A PT sensor is injection-molded into a second injection-molded housing. After connecting the two injection-molded housings to the valve body, a circuit board is installed into the receiving cavity and connected to each pin. Finally, a cover plate is installed, thus achieving assembly and reducing assembly and testing processes, thereby improving production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An electronic expansion valve includes a valve body, a first injection-molded housing, a second injection-molded housing, a coil assembly, a position sensor, and a PT sensor. The first and second injection-molded housings are respectively connected to the valve body, and the coil assembly is injection-molded in the first injection-molded housing. The position sensor is injection molded in a first injection molded housing, and / or the PT sensor is injection molded in a second injection molded housing.

[0006] Furthermore, a cover plate is provided on the second injection molded housing, and a receiving cavity is formed between the second injection molded housing and the cover plate, and a circuit board is provided in the receiving cavity.

[0007] Furthermore, the side wall of the second injection-molded housing is provided with a fixing port that communicates with the receiving cavity, and the first injection-molded housing is provided with an insertion part that cooperates with the fixing port.

[0008] Furthermore, a first pin for connection to the coil assembly is injection molded inside the first injection-molded housing; the end of the first pin away from the coil assembly extends from the insertion portion and is connected to the circuit board.

[0009] Furthermore, a second pin connected to a position sensor is injection molded inside the first injection-molded housing; the end of the second pin away from the position sensor extends out from the insertion part and is connected to the circuit board.

[0010] Furthermore, a connector is provided on the first injection-molded housing; a third pin is injection-molded inside the first injection-molded housing; one end of the third pin extends out from the insertion part and connects to the circuit board, and the other end extends into the connector.

[0011] Furthermore, the PT sensor is provided with a fourth pin located in the receiving cavity, and the fourth pin is connected to the circuit board.

[0012] Furthermore, the first pin, the second pin, the third pin, and the fourth pin each include parallel circuit board insertion sections.

[0013] Furthermore, the first injection-molded housing and the second injection-molded housing are respectively connected to different side walls of the valve body.

[0014] In summary, this utility model has the following beneficial effects: 1. The position sensor is injection molded into the first injection housing, which not only achieves the sealing and fixing of the position sensor, but also reduces the number of parts such as cover plates and seals, thereby reducing assembly processes and airtightness testing processes, significantly reducing the risk of coil waterproofing and airtightness, and effectively improving sealing effect, production efficiency and quality level; 2. The PT sensor is injection molded into the second injection housing, which not only achieves the sealing and fixation of the PT sensor, but also reduces the number of clamping parts, sealing parts and other components, thereby reducing assembly and airtightness testing processes, significantly reducing the difficulty of coil design and waterproof airtightness testing, and effectively improving sealing effect, production efficiency and quality level. 3. By directly integrating each pin onto a single circuit board, the need for transition circuit boards and connecting wires can be effectively eliminated, thereby reducing the number of parts, reducing assembly steps, and ultimately simplifying the overall structure and improving production efficiency; at the same time, the overall circuit board is smaller in size, has low redundancy, and saves costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the electronic expansion valve in the embodiment. Figure 1 ; Figure 2 This is a schematic diagram of the electronic expansion valve in the embodiment. Figure 2 ; Figure 3This is a schematic diagram of the electronic expansion valve in the embodiment. Figure 3 ; Figure 4 This is a schematic diagram of the electronic expansion valve in the embodiment. Figure 4 .

[0016] In the figure: 1. Valve body; 2. First injection molded housing; 21. Connector; 22. Insertion part; 3. Second injection molded housing; 31. Fixing port; 4. Cover plate; 5. Coil assembly; 6. Position sensor; 7. PT sensor; 71. Fourth pin; 8. Circuit board; 91. First pin; 92. Second pin; 93. Third pin. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example

[0019] An electronic expansion valve, reference Figures 1 to 4 It includes a valve body 1, a first injection-molded housing 2, a second injection-molded housing 3, a cover plate 4, a coil assembly 5, a position sensor 6, a PT sensor 7, a circuit board 8, a first pin 91, a second pin 92, a third pin 93, and a fourth pin 71; the coil assembly 5, the position sensor 6, the first pin 91, the second pin 92, and the third pin 93 are injection-molded in the first injection-molded housing 2, and the PT sensor 7 is injection-molded in the second injection-molded housing 3.

[0020] Reference Figures 1 to 4 The position sensor 6 is injection molded into the first injection molded housing 2, which not only achieves the sealing and fixation of the position sensor 6, but also reduces the assembly process and airtightness testing process, significantly reducing the risk of coil waterproofing and airtightness, and effectively improving the sealing effect, production efficiency and quality level. The PT sensor 7 is injection molded into the second injection molded housing 3, which not only achieves the sealing and fixation of the PT sensor 7, but also reduces the assembly process and airtightness testing process, significantly reducing the difficulty of coil design and waterproofing and airtightness testing, and effectively improving the sealing effect, production efficiency and quality level.

[0021] Reference Figures 1 to 4The second injection-molded housing 3 has an installation opening at its top and a fixing opening 31 on its side wall; the cover plate 4 is sealed at the installation opening to close it; the first injection-molded housing 2 has an insertion part 22, which is embedded into the fixing opening 31 to connect the first injection-molded housing 2 and the second injection-molded housing 3; a receiving cavity is formed between the cover plate 4 and the second injection-molded housing 3, the circuit board 8 is disposed in the receiving cavity, and the fixing opening 31 communicates with the receiving cavity; that is, the circuit board 8 is fixed in the receiving cavity through the installation opening, and then the installation opening is closed by the cover plate 4.

[0022] Reference Figures 1 to 4 The first pin 91 has multiple first pins 91, and each first pin 91 includes multiple bent sections; one end of the first pin 91 is connected to the coil assembly 5, and the other end extends from the end face of the insertion part 22 and is connected to the circuit board 8; the second pin 92 has multiple second pins 92, and each second pin 92 includes multiple bent sections; one end of the second pin 92 is connected to the position sensor 6, and the other end extends from the end face of the insertion part 22 and is connected to the circuit board 8; a connector 21 is provided on the first injection molded housing 2; the third pin 93 has multiple third pins 93, and each third pin 93 includes multiple bent sections; one end of the third pin 93 extends from the end face of the insertion part 22 and is connected to the circuit board 8, and the other end extends into the connector 21; the PT sensor 7 includes a fourth pin 71 located in the receiving cavity, the fourth pin 71 has multiple fourth pins 71, and the fourth pin 71 is connected to the circuit board 8.

[0023] Reference Figures 1 to 4 Preferably, the first pin 91, the second pin 92, the third pin 93 and the fourth pin 71 each include parallel circuit board insertion sections; these circuit board insertion sections face the mounting port, and when the circuit board 8 is installed into the receiving cavity, these circuit board insertion sections directly pass through the conductive ports on the circuit board 8 to achieve rapid assembly, which can effectively eliminate the need for the use of transition circuit boards and connecting wires, thereby reducing the number of parts.

[0024] Reference Figures 1 to 4 In this embodiment, the coil assembly 5, position sensor 6, first pin 91, second pin 92, and third pin 93 are injection molded into the first injection molded housing 2, and the PT sensor 7 is injection molded into the second injection molded housing 3. After connecting the two injection molded housings to the valve body 1, the circuit board 8 is installed into the receiving cavity and connected to each pin. Finally, the cover plate 4 is installed to complete the assembly, thereby increasing the waterproof reliability of the sensor, simplifying the sensor assembly structure, optimizing the space occupied by the installation structure, reducing the redundancy of the circuit board space, reducing assembly steps, and improving production efficiency.

[0025] Reference Figures 1 to 4By connecting each pin to a circuit board 8, the transition circuit board and connecting wires can be eliminated, reducing the number of parts and assembly steps, simplifying the overall structure, and improving production efficiency.

Claims

1. An electronic expansion valve, comprising a valve body, a first injection-molded housing, a second injection-molded housing, a coil assembly, a position sensor, and a PT sensor, wherein the first injection-molded housing and the second injection-molded housing are respectively connected to the valve body, and the coil assembly is injection-molded in the first injection-molded housing; Its features are: The position sensor is injection molded in a first injection molded housing, and / or the PT sensor is injection molded in a second injection molded housing.

2. The electronic expansion valve according to claim 1, characterized in that: The second injection molded housing is provided with a cover plate, and a receiving cavity is formed between the second injection molded housing and the cover plate, and a circuit board is provided in the receiving cavity.

3. The electronic expansion valve according to claim 2, characterized in that: The second injection-molded housing has a fixing port on its side wall that communicates with the receiving cavity, and the first injection-molded housing has an insertion part that mates with the fixing port.

4. The electronic expansion valve according to claim 2, characterized in that: The first injection-molded housing contains a first pin that connects to the coil assembly; the end of the first pin away from the coil assembly extends from the insertion portion and connects to the circuit board.

5. The electronic expansion valve according to claim 4, characterized in that: The first injection-molded housing contains a second pin that is connected to the position sensor; the end of the second pin that is away from the position sensor extends out from the insertion part and is connected to the circuit board.

6. The electronic expansion valve according to claim 5, characterized in that: The first injection-molded housing is provided with a connector; a third pin is injection-molded inside the first injection-molded housing; one end of the third pin extends out from the insertion part and connects to the circuit board, and the other end extends into the connector.

7. The electronic expansion valve according to claim 6, characterized in that: The PT sensor is provided with a fourth pin located in the receiving cavity, and the fourth pin is connected to the circuit board.

8. The electronic expansion valve according to claim 7, characterized in that: The first pin, the second pin, the third pin, and the fourth pin each include parallel circuit board insertion sections.

9. The electronic expansion valve according to claim 1, characterized in that: The first injection-molded housing and the second injection-molded housing are respectively connected to different side walls of the valve body.

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