Electronic expansion valve

Abstract

Provided in the present application is an electronic expansion valve, comprising: a valve body, which has a first mounting cavity and a second mounting cavity; a valve assembly, which is arranged in the first mounting cavity and comprises a sleeve, a coil assembly and a circuit board, wherein the sleeve is fixed to the valve body, the coil assembly is sleeved on the outer side of the sleeve, the circuit board is arranged perpendicular to the extension direction of the sleeve, and the coil assembly is electrically connected to the circuit board; a sensor, wherein a detection end of the sensor is arranged in the second mounting cavity, the axial direction of the sensor is perpendicular to the extension direction of the sleeve, and a connection end of the sensor is located on the outer side of the valve body; and a connection assembly, wherein one end of the connection assembly is electrically connected to the connection end of the sensor, and the other end is electrically connected to the circuit board. The technical solution provided in the present application solves the problem in the prior art of a direct electrical connection between sensors and circuit boards being unsuitable when the distance therebetween is relatively large.

Description

Electronic expansion valve

[0001] This application claims priority to the patent application filed on January 24, 2025, with China National Intellectual Property Administration, application number 202510121127.7, entitled "Electronic Expansion Valve". Technical Field

[0002] This application relates to the field of electronic expansion valve technology, and more specifically, to an electronic expansion valve. Background Technology

[0003] In electronic expansion valves, the valve body, sensor, valve assembly, and circuit board are the main components. In existing designs, when the sensor and circuit board are close together and both are located within the same housing, the sensor can be directly electrically connected to the circuit board. However, this direct electrical connection is not suitable for structures where the sensor and circuit board are far apart. Summary of the Invention

[0004] This application provides an electronic expansion valve to solve the problem that the direct electrical connection between the sensor and the circuit board is not applicable when the distance between them is far.

[0005] This application provides an electronic expansion valve, comprising: a valve body having a first mounting cavity and a second mounting cavity, the first mounting cavity and the second mounting cavity being located at opposite ends of the valve body and on different sides of the valve body; a valve assembly disposed in the first mounting cavity, the valve assembly including a sleeve, a coil assembly, and a circuit board, the sleeve being fixed to the valve body, the coil assembly being sleeved on the outside of the sleeve; the coil assembly including a coil housing, the circuit board being located in a cavity inside the coil housing; the circuit board being disposed perpendicular to the extension direction of the sleeve, and the coil assembly being electrically connected to the circuit board; a sensor, the detection end of the sensor being disposed in the second mounting cavity, the axial direction of the sensor being perpendicular to the extension direction of the sleeve, and the connection end of the sensor being located on the outside of the valve body; and a connecting assembly, one end of the connecting assembly being electrically connected to the connection end of the sensor, and the other end of the connecting assembly being electrically connected to the circuit board.

[0006] Furthermore, the coil housing has a first pin, the first end of which is connected to the circuit board, and the second end of which is located on the outer wall of the coil housing and electrically connected to the connecting assembly. The sensor includes a housing and a second pin, the first end of which is located inside the housing, and the second end of which is located on the outer wall of the housing and forms a connecting end.

[0007] Furthermore, the connecting assembly includes: a cover, the second end of the first pin, the connecting end of the second pin, and the cover are all located on the same side of the valve body, and the cover covers the second end of the first pin and the connecting end of the second pin; the cover has a conductive element inside, and the two ends of the conductive element are electrically connected to the second end of the first pin and the connecting end of the second pin, respectively.

[0008] Furthermore, the cover has a first electrical connector and a second electrical connector, with the two ends of the conductive element located inside the first electrical connector and the second electrical connector, respectively; the coil housing has a third electrical connector, with the second end of the first pin located inside the third electrical connector; the portion of the sensor extending out of the valve body is sealed to the second electrical connector; the first electrical connector and the third electrical connector are sealed to each other.

[0009] Furthermore, the middle part of the conductive component is embedded in the cover wall, and the two ends of the conductive component extend out of the cover wall. The two ends of the conductive component are electrically connected to the second end of the first pin and the connecting end of the second pin, respectively.

[0010] Furthermore, a first spring is provided between the conductive element and the second end of the first pin; and / or, a second spring is provided between the conductive element and the connecting end of the second pin.

[0011] Furthermore, the coil housing has a first annular protrusion surrounding the outer periphery of the second end of the first pin; the cover has a first connecting groove, with one end of the conductive element connected to the first pin located within the first connecting groove, and the first annular protrusion located within the first connecting groove.

[0012] Furthermore, the connecting assembly also includes: a first spring piece located inside the housing, at least a portion of the first spring piece being located within the first annular protrusion, one end of the first spring piece being connected to the second end of the first pin, and the other end of the first spring piece being electrically connected to a conductive element.

[0013] Furthermore, the housing has a second annular protrusion surrounding the outer periphery of the second end of the second pin; the cover has a second connecting groove, with one end of the conductive element connected to the second pin located within the second connecting groove, and the second annular protrusion located within the second connecting groove.

[0014] Furthermore, the connecting assembly also includes: a second spring sheet located inside the housing, at least a portion of the second spring sheet being located within the second annular protrusion, one end of the second spring sheet being connected to the second end of the second pin, and the other end of the second spring sheet being electrically connected to a conductive element.

[0015] Furthermore, the cover includes a top plate and a circumferential sidewall, the circumferential sidewall surrounds the outer edge of the top plate, and the end of the circumferential sidewall protrudes from the inner surface of the top plate; the bottom wall of the first connecting groove is part of the inner surface of the top plate; a sealing element is provided between the first connecting groove and the first annular protrusion.

[0016] Furthermore, the end of the first connecting groove facing the valve body is provided with a stepped notch, and the seal corresponding to the first connecting groove is located inside the notch.

[0017] Furthermore, the cover includes a top plate and a circumferential sidewall, the circumferential sidewall surrounds the outer edge of the top plate, and the end of the circumferential sidewall protrudes from the inner surface of the top plate; the bottom wall of the second connecting groove is part of the inner surface of the top plate; a sealing element is provided between the second connecting groove and the second annular protrusion.

[0018] Furthermore, the end of the second connecting groove facing the valve body is provided with a stepped notch, and the seal corresponding to the second connecting groove is located inside the notch.

[0019] Furthermore, a pressure plate is provided on the valve body, some sensors are clamped between the pressure plate and the valve body, the pressure plate is fixedly connected to the valve body, and some pressure plates are clamped between the cover and the valve body, the cover is fixedly connected to the valve body.

[0020] Furthermore, at least some of the conductive components are injection molded into the casing.

[0021] By applying the technical solution of this application, a connecting component is provided on the electronic expansion valve. One end of the connecting component is electrically connected to the connection end of the sensor, and the other end of the connecting component is electrically connected to the circuit board. This allows for indirect connection between the circuit board and the sensor even when the sensor and the circuit board are located at opposite ends of the valve body and on different sides, with a significant distance between them. The connecting component also ensures the reliability of the electrical connection process between the circuit board and the sensor. The connecting component has a simple structure and is easy to install, improving the convenience of the electrical connection process between the circuit board and the sensor, even when they are far apart. Furthermore, since the connecting component is not located inside the coil housing, its structure can be flexibly adjusted to accommodate electrical connections between sensors and circuit boards at different distances. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 shows a schematic diagram of the structure of the electronic expansion valve provided in this application;

[0024] Figure 2 shows a schematic diagram of the structure of the cover and conductive components provided in this application;

[0025] Figure 3 shows a partial structural schematic diagram of the electronic expansion valve provided in this application;

[0026] Figure 4 shows a cross-sectional schematic diagram of the electronic expansion valve provided in this application;

[0027] Figure 5 shows a schematic diagram of the structure of the first insert provided in this application.

[0028] The above-mentioned figures include the following reference numerals: 10, valve body; 20, valve assembly; 21, sleeve; 22, coil assembly; 23, circuit board; 24, coil housing; 241, first annular protrusion; 25, first pin; 251, first end; 252, second end; 30, sensor; 31, housing; 311, second annular protrusion; 32, second pin; 40, connecting assembly; 41, cover; 411, first connecting groove; 412, second connecting groove; 42, conductive element; 43, first spring; 44, second spring; 50, sealing element; 60, pressure plate. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] As shown in Figures 1 to 5, this application provides an electronic expansion valve, which includes a valve body 10, a valve assembly 20, a sensor 30, and a connecting assembly 40. The valve body 10 has a first mounting cavity and a second mounting cavity, located at opposite ends of the valve body 10 and on different sides. The valve assembly 20 is disposed in the first mounting cavity and includes a sleeve 21, a coil assembly 22, and a circuit board 23. The sleeve 21 is fixed to the valve body 10, and the coil assembly 22 is sleeved on the outside of the sleeve 21. The coil assembly 22 includes a coil housing 24, and the circuit board 23 is located in a cavity inside the coil housing 24. The circuit board 23 is perpendicular to the extension direction of the sleeve 21, and the coil assembly 22 is electrically connected to the circuit board 23. The detection end of the sensor 30 is disposed in the second mounting cavity, and the axial direction of the sensor 30 is perpendicular to the extension direction of the sleeve 21. The connection end of the sensor 30 is located outside the valve body 10. One end of the connecting assembly 40 is electrically connected to the connection end of the sensor 30, and the other end of the connecting assembly 40 is electrically connected to the circuit board 23.

[0031] By applying the technical solution of this application, a connecting component 40 is provided on the electronic expansion valve. One end of the connecting component 40 is electrically connected to the connection end of the sensor 30, and the other end of the connecting component 40 is electrically connected to the circuit board 23. This allows for an indirect connection between the circuit board 23 and the sensor 30 even when the sensor 30 and the circuit board 23 are located at opposite ends of the valve body 10 and on different sides of the valve body 10, and are far apart. The connecting component 40 also ensures the reliability of the electrical connection process between the circuit board 23 and the sensor 30. The connecting component 40 has a simple structure and is easy to install, simplifying the electrical connection process between the circuit board 23 and the sensor 30 when they are far apart. Furthermore, since the connecting component 40 is not located inside the coil housing 24, its structure can be flexibly adjusted to accommodate electrical connections between the sensor 30 and the circuit board 23 at different distances.

[0032] Furthermore, by sleeved coil assembly 22 on the outside of sleeve 21, circuit board 23 is located in the cavity inside coil housing 24, circuit board 23 is arranged perpendicular to the extension direction of sleeve 21, and coil assembly 22 is electrically connected to circuit board 23. The axial direction of sensor 30 is perpendicular to the extension direction of sleeve 21. With this arrangement, coil assembly 22 and circuit board 23 are arranged close to each other, and circuit board 23 is directly set inside coil housing 24, which improves the integration of the entire device. Moreover, when assembling the electronic expansion valve, there is no need to assemble circuit board 23 separately. Only valve assembly 20 and sensor 30 need to be assembled on valve body 10, which simplifies the subsequent complex assembly process and effectively improves the assembly speed.

[0033] The circuit board 23 is placed inside the coil housing 24, which provides additional physical protection against damage to the circuit board 23 caused by water, dust, mechanical impact, etc. in the external environment.

[0034] In the embodiments of this application, sensor 30 includes, but is not limited to, a PT sensor (Platinum Resistance Temperature Detector). PT sensors have very high temperature measurement accuracy, which is beneficial for achieving precise control of the entire device. Furthermore, PT sensors have strong anti-interference capabilities against electromagnetic interference and other external factors, ensuring that measurement accuracy and reliability are maintained even under complex operating conditions.

[0035] As shown in Figures 4 and 5, the coil housing 24 contains a first pin 25. The first end 251 of the first pin 25 is connected to the circuit board 23, and the second end 252 of the first pin 25 is located on the outer wall of the coil housing 24 and electrically connected to the connecting assembly 40. The sensor 30 includes a housing 31 and a second pin 32. The first end of the second pin 32 is located inside the housing 31, and the second end of the second pin 32 is located on the outer wall of the housing 31, forming a connecting end. With this configuration, the first end 251 of the first pin 25 is connected to the circuit board 23, and the second end 252 of the first pin 25 is located on the outer wall of the coil housing 24 and electrically connected to the connecting assembly 40, simplifying the connection between the circuit board 23 and the connecting assembly 40 and facilitating installation and maintenance.

[0036] The sensor 30 is designed with a housing 31 and a second pin 32. This design makes it easier to connect the sensor 30 to the connecting component 40, and the resulting connection point facilitates subsequent electrical connection and signal transmission.

[0037] As shown in Figure 2, the connecting assembly 40 includes a cover 41 and a conductive element 42. The second end 252 of the first pin 25, the connecting end of the second pin 32, and the cover 41 are all located on the same side of the valve body 10. The cover 41 covers the second end 252 of the first pin 25 and the connecting end of the second pin 32. The conductive element 42 is disposed inside the cover 41, and its two ends are electrically connected to the second end 252 of the first pin 25 and the connecting end of the second pin 32, respectively. Through this design, the cover 41 effectively protects the second end 252 of the first pin 25 and the connecting end of the second pin 32, preventing damage or poor contact of the pins in harsh environments such as vibration, impact, humidity, or dust, thus improving the stability and reliability of the connection. Furthermore, the electrical connection of the two ends of the conductive element 42 to the first pin 25 and the second pin 32 simplifies the alignment complexity during assembly, making assembly more efficient. Meanwhile, the design of the cover 41 also facilitates later maintenance and replacement. There is no need to disassemble the entire device; only the damaged components need to be replaced, thus reducing maintenance costs.

[0038] The enclosure 41 has a first electrical connector and a second electrical connector, with both ends of the conductive element 42 located within the first and second electrical connectors, respectively. The coil housing 24 has a third electrical connector, with the second end 252 of the first pin 25 located within the third electrical connector. The portion of the sensor 30 extending outside the valve body 10 is sealed and connected to the second electrical connector. The first and third electrical connectors are also sealed and connected. By arranging the two ends of the conductive element 42 within the first and second electrical connectors, and the second end 252 of the first pin 25 located within the third electrical connector, the two ends of the conductive element 42 and the second end 252 of the first pin 25 are prevented from being exposed, providing excellent protection and improving the stability and reliability of the device. Furthermore, the sealed connection between the portion of the sensor 30 extending outside the valve body 10 and the second electrical connector, as well as the sealing between the first and third electrical connectors, ensures a sealed electrical connection environment, preventing external contaminants from entering and effectively extending the device's lifespan. Additionally, this design simplifies the alignment complexity during assembly, effectively shortening assembly time and simplifying the overall electrical connection assembly process.

[0039] Furthermore, the middle portion of the conductive element 42 is embedded within the wall of the cover 41, while both ends of the conductive element 42 extend to the outside of the wall of the cover 41. The two ends of the conductive element 42 are electrically connected to the second end 252 of the first pin 25 and the connecting end of the second pin 32, respectively. By embedding the middle portion of the conductive element 42 within the wall of the cover 41, subsequent assembly of the conductive element 42 eliminates the need for manual assembly, thus increasing assembly speed and further simplifying the assembly process. The two ends of the conductive element 42 extending to the outside of the wall of the cover ensure electrical connection between the two protruding ends of the conductive element 42 and the second end 252 of the first pin 25 and the connecting end of the second pin 32, while also protecting the embedded middle portion of the conductive element 42 from external impacts and contamination, thereby improving the reliability of the device.

[0040] In the embodiments of this application, the middle part of the conductive element 42 is embedded in the wall of the cover 41. It can be that the wall of the cover 41 has a through hole that matches the shape of the conductive element 42, and the middle part of the conductive element 42 is directly inserted into it, with the two ends of the conductive element 42 exposed; it can also be that the middle part of the conductive element 42 is directly injection molded into the wall of the cover 41 using an injection molding process, with the two ends of the conductive element 42 exposed; or other secondary processing processes can be used to embed the middle part of the conductive element 42 in the wall of the cover 41. No specific limitation is made here.

[0041] Furthermore, the conductive component 42 serves as the direct transmission path for signals. Its layout within the housing 41 can optimize the signal transmission path, reduce signal loss, and improve the efficiency and quality of signal transmission. This design also integrates the connecting components 40 together, reducing external wiring and making the overall structure more compact, which is beneficial for saving space. At the same time, it also improves the integration of the entire device, making the cooperation between components tighter and reducing the impact of external factors on the device performance.

[0042] In the embodiments of this application, the conductive element 42 can be curved or straight, and no specific limitation is made in this application; the choice can be made as needed. A curved conductive element 42 can better adapt to compact or complex spatial layouts, helping the conductive element 42 to achieve connections between different components, even if these components are not directly aligned in space. The curved design can naturally absorb and mitigate stress caused by vibration, thermal expansion and contraction, etc., during assembly or use, reducing the risk of breakage due to stress concentration and improving connection stability. By designing an appropriate bending angle, the conductive element 42 can generate preload at the contact point with the other end, ensuring reliable contact even when the external environment changes. A straight conductive element 42 is easier to handle during assembly, especially when space is sufficient and components are well aligned. It can be quickly inserted and fixed, improving assembly efficiency. It may also be more economical in terms of materials, as no additional bending processing is required, reducing material waste and processing costs. It may also provide more stable signal transmission because it reduces additional turning points in the signal path, reducing signal loss and interference.

[0043] Furthermore, a first spring tab 43 is provided between the conductive element 42 and the second end 252 of the first pin 25; and / or, a second spring tab 44 is provided between the conductive element 42 and the connection end of the second pin 32. Through the above arrangement, the first spring tab 43 and the second spring tab 44 are elastic, ensuring that even after vibration, thermal expansion and contraction, or prolonged use of the valve body 10, the connection between the conductive element 42 and the first pin 25 and the second pin 32 maintains good electrical contact, avoiding signal interruption or instability caused by poor contact. In addition, the design of the first spring tab 43 and the second spring tab 44 simplifies the assembly process of the electrical connection, eliminating the need for additional welding or complex fixing methods. Simultaneously, when maintenance or replacement of the coil assembly 22 or the sensor 30 is required, the elastic characteristics of the spring tabs make the replacement operation more convenient, reducing maintenance costs and operational difficulty. Moreover, as a bridge for electrical connection, the good conductivity and elastic contact of the spring tabs can reduce resistance during signal transmission, improving the efficiency and quality of signal transmission.

[0044] In the embodiments of this application, the first spring 43 can be a movable component, not necessarily fixedly connected to the first pin 25 or the conductive component 42; or the first spring 43 can be fixedly connected to the first pin 25; or the first spring 43 can be fixedly connected to the conductive component 42. The connection method of the first spring 43 is not specifically limited here, as long as it enables electrical connection between the connecting component 40, the circuit board 23, and the sensor 30. In use, the most suitable connection method can be selected as needed based on actual conditions. The connection method of the second spring 44 is the same as that of the first spring 43, and will not be described again here.

[0045] In other embodiments of this application, the conductive element 42 is curved, so that the curved part can extend directly into the protrusion from the top of the protrusion and be electrically connected to the first pin 25 or the second pin 32, which eliminates the need for the first spring 43 or the second spring 44, reduces the electrical connection process, and saves costs.

[0046] As shown in Figure 3, the coil housing 24 has a first annular protrusion 241 surrounding the outer periphery of the second end 252 of the first pin 25. The cover 41 has a first connecting groove 411, with the end of the conductive element 42 connected to the first pin 25 located within the first connecting groove 411. The first annular protrusion 241 is also located within the first connecting groove 411. This configuration provides a clear positioning reference for the first annular protrusion 241 and the first connecting groove 411, allowing the cover 41 to be precisely fitted onto the second pin 32 during assembly. This eliminates the need for additional fixing or positioning steps during assembly; simply fitting the cover 41 onto the protrusion completes the assembly, improving assembly efficiency and ensuring the relative positions of the components, thereby optimizing the stability of the electrical connection. Furthermore, by designing the first annular protrusion 241 to surround the outer periphery of the second end 252 of the first pin 25, accidental collisions or damage to the first pin 25 during assembly or use can be effectively prevented, improving the reliability and durability of the pin connection.

[0047] Preferably, the connecting assembly 40 further includes a first spring piece 43 located within the cover 41. At least a portion of the first spring piece 43 is located within the first annular protrusion 241. One end of the first spring piece 43 is connected to the second end 252 of the first pin 25, and the other end of the first spring piece 43 is electrically connected to the conductive element 42. Through this arrangement, the elasticity of the first spring piece 43 ensures that even after vibration, thermal expansion and contraction, or prolonged use of the valve body 10, the electrical connection between the conductive element 42 and the first pin 25 maintains good electrical contact, avoiding signal interruption or instability caused by poor contact. Here, the connection method of the first spring piece 43 is not specifically limited and can be selected as needed.

[0048] Furthermore, the housing 31 has a second annular protrusion 311 surrounding the outer periphery of the second end of the second pin 32; the cover 41 has a second connecting groove 412, with the end of the conductive element 42 connected to the second pin 32 located within the second connecting groove 412, and the second annular protrusion 311 located within the second connecting groove 412. Through the above arrangement, the second annular protrusion 311 and the second connecting groove 412 provide a clear positioning reference, allowing the cover 41 to be accurately placed over the second pin 32 during subsequent assembly. This eliminates the need for additional fixing or positioning steps during assembly; assembly can be completed simply by placing the cover 41 over the protrusion, improving assembly efficiency while ensuring the relative positions of the components, thereby optimizing the stability of the electrical connection. In addition, by designing the second annular protrusion 311 to surround the outer periphery of the second end of the second pin 32, accidental collisions or damage to the second pin 32 during assembly or use can be effectively prevented, improving the reliability and durability of the pin connection.

[0049] Preferably, the connecting assembly 40 further includes a second spring piece 44 located within the cover 41. At least a portion of the second spring piece 44 is located within the second annular protrusion 311. One end of the second spring piece 44 is connected to the second end of the second pin 32, and the other end of the second spring piece 44 is electrically connected to the conductive element 42. Through this arrangement, the elasticity of the second spring piece 44 ensures that even after vibration, thermal expansion and contraction, or prolonged use of the valve body 10, the electrical connection between the conductive element 42 and the second pin 32 maintains good electrical contact, preventing signal interruption or instability caused by poor contact. The connection method of the second spring piece 44 is not specifically limited here; it can be selected as needed.

[0050] Specifically, the cover 41 includes a top plate and circumferential sidewalls. The circumferential sidewalls surround the outer edge of the top plate, and the ends of the circumferential sidewalls protrude from the inner surface of the top plate. The bottom wall of the first connecting groove 411 is part of the inner surface of the top plate. A sealing element is provided between the first connecting groove 411 and the first annular protrusion 241. Through the above configuration, the sealing element 50 can effectively isolate external contaminants such as moisture and dust, protect the internal electrical connection from corrosion or short circuits, enhance the sealing performance of the electrical connection, and the elastic properties of the sealing element 50 can absorb vibration and impact, reducing the impact of these external factors on the internal electrical connection, maintaining the stability of the electrical connection, reducing maintenance requirements, and improving the reliability and service life of the entire device.

[0051] The first connecting groove 411 has a stepped notch at one end facing the valve body 10, and the corresponding seal is located within the notch. By placing the seal 50 within the notch of the first connecting groove 411, the sealing performance of the device is further improved, the service life of the seal 50 is extended, frequent seal replacements are avoided, and the stability of the device is enhanced.

[0052] Similarly, the bottom wall of the second connecting groove 412 can be set as part of the inner surface of the top plate; a seal is provided between the second connecting groove 412 and the second annular protrusion 311. Through the above arrangement, the seal 50 can effectively isolate external contaminants such as moisture and dust, protect the internal electrical connection from corrosion or short circuits, enhance the sealing performance of the electrical connection, and the elastic properties of the seal 50 can absorb vibration and impact, reducing the impact of these external factors on the internal electrical connection, maintaining the stability of the electrical connection, reducing maintenance requirements, and improving the reliability and service life of the entire device.

[0053] The second connecting groove 412 has a stepped notch at one end facing the valve body 10, and the corresponding seal is located within the notch. By placing the seal 50 within the notch of the second connecting groove 412, the sealing performance of the device is further improved, the service life of the seal is extended, frequent seal replacements are avoided, and the stability of the device is enhanced.

[0054] As can be seen from the above description, spring sheets, annular protrusions and other structures can be provided at either end of the cover 41, or spring sheets, annular protrusions and other structures can be provided at both ends of the cover 41, and can be processed according to specific installation and design needs.

[0055] Furthermore, a pressure plate 60 is provided on the valve body 10. Part of the sensor 30 is clamped between the pressure plate 60 and the valve body 10, and the pressure plate 60 is fixedly connected to the valve body 10. Another part of the pressure plate 60 is clamped between the cover 41 and the valve body 10, and the cover 41 is fixedly connected to the valve body 10. Through this arrangement, the pressure plate 60 ensures that the sensor 30 is firmly fixed to the valve body 10, preventing the sensor 30 from moving or loosening due to vibration, mechanical impact, or thermal expansion and contraction, thus ensuring the stability and accuracy of the sensor 30 under various working conditions. In addition, the pressure plate 60 facilitates the fixing of the sensor 30 and also facilitates fixing the sensor 30 to the valve body 10 without drilling holes in the sensor 30 to assemble it into the valve body 10, improving the convenience of the assembly process for the entire device.

[0056] At least a portion of the conductive component 42 is injection-molded within the housing 41. This injection molding process, which fixes at least a portion of the conductive component 42 within the housing 41, improves the bonding strength between the conductive component 42 and the housing 41, resulting in a more stable overall structure. This reduces the risk of displacement or damage to the conductive component 42 due to vibration or impact during use. Furthermore, the injection-molded material forms a tight encapsulation, completely isolating the conductive component 42 from the external environment, providing excellent waterproof and dustproof performance, protecting the conductive component 42 from corrosion or contamination, and extending its service life. In addition, the pre-molded bonding of the conductive component 42 to the housing 41 reduces assembly steps, eliminating the need for on-site installation and fixing of the conductive component 42, improving assembly efficiency, and reducing production costs.

[0057] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic expansion valve, characterized in that, The electronic expansion valve includes: The valve body (10) has a first mounting cavity and a second mounting cavity, the first mounting cavity and the second mounting cavity being located at both ends of the valve body (10) and on different sides of the valve body (10); A valve assembly (20) is disposed in the first mounting cavity. The valve assembly (20) includes a sleeve (21), a coil assembly (22), and a circuit board (23). The sleeve (21) is fixed to the valve body (10), and the coil assembly (22) is sleeved on the outside of the sleeve (21). The coil assembly (22) includes a coil housing (24), and the circuit board (23) is located in the cavity inside the coil housing (24). The circuit board (23) is arranged perpendicular to the extension direction of the sleeve (21), and the coil assembly (22) is electrically connected to the circuit board (23). The sensor (30) has its detection end located in the second mounting cavity, and the axial direction of the sensor (30) is perpendicular to the extension direction of the sleeve (21). The connection end of the sensor (30) is located outside the valve body (10). A connecting component (40) is provided, one end of which is electrically connected to the connecting end of the sensor (30), and the other end of which is electrically connected to the circuit board (23).

2. The electronic expansion valve according to claim 1, characterized in that, The coil housing (24) has a first pin (25), the first end (251) of the first pin (25) is connected to the circuit board (23), the second end (252) of the first pin (25) is located on the outer side wall of the coil housing (24) and is electrically connected to the connecting assembly (40). The sensor (30) includes a housing (31) and a second pin (32), the first end of the second pin (32) is located inside the housing (31), and the second end of the second pin (32) is located on the outer side wall of the housing (31) and forms the connecting end.

3. The electronic expansion valve according to claim 2, characterized in that, The connection component (40) includes: The cover (41), the second end (252) of the first pin (25), the connecting end of the second pin (32) and the cover (41) are all located on the same side of the valve body (10), and the cover (41) covers the second end (252) of the first pin (25) and the connecting end of the second pin (32); The cover (41) has a conductive element (42) inside, and the two ends of the conductive element (42) are electrically connected to the second end (252) of the first pin (25) and the connection end of the second pin (32), respectively.

4. The electronic expansion valve according to claim 3, characterized in that, The cover (41) has a first electrical connector and a second electrical connector, and the two ends of the conductive element (42) are respectively located inside the first electrical connector and the second electrical connector; the coil housing (24) has a third electrical connector, and the second end (252) of the first pin (25) is located inside the third electrical connector; the part of the sensor (30) extending out of the valve body (10) is sealed to the second electrical connector; the first electrical connector is sealed to the third electrical connector.

5. The electronic expansion valve according to claim 3, characterized in that, The middle part of the conductive element (42) is embedded in the wall of the cover (41), and the two ends of the conductive element (42) extend out of the wall of the cover (41). The two ends of the conductive element (42) are electrically connected to the second end (252) of the first pin (25) and the connection end of the second pin (32), respectively.

6. The electronic expansion valve according to claim 3, characterized in that, A first spring (43) is provided between the conductive element (42) and the second end (252) of the first pin (25); and / or, a second spring (44) is provided between the conductive element (42) and the connection end of the second pin (32).

7. The electronic expansion valve according to claim 3, characterized in that, The coil housing (24) has a first annular protrusion (241) surrounding the outer periphery of the second end (252) of the first pin (25); The cover (41) has a first connecting groove (411), one end of the conductive element (42) connected to the first pin (25) is located in the first connecting groove (411), and the first annular protrusion (241) is located in the first connecting groove (411).

8. The electronic expansion valve according to claim 7, characterized in that, The connection component (40) further includes: The first spring (43) is located inside the cover (41), at least part of the first spring (43) is located inside the first annular protrusion (241), one end of the first spring (43) is connected to the second end (252) of the first pin (25), and the other end of the first spring (43) is electrically connected to the conductive element (42).

9. The electronic expansion valve according to claim 3, characterized in that, The housing (31) has a second annular protrusion (311), which surrounds the outer periphery of the second end of the second pin (32); The cover (41) has a second connecting groove (412), one end of the conductive element (42) connected to the second pin (32) is located in the second connecting groove (412), and the second annular protrusion (311) is located in the second connecting groove (412).

10. The electronic expansion valve according to claim 9, characterized in that, The connection component (40) further includes: The second spring (44) is located inside the cover (41), at least part of the second spring (44) is located inside the second annular protrusion (311), one end of the second spring (44) is connected to the second end of the second pin (32), and the other end of the second spring (44) is electrically connected to the conductive element (42).

11. The electronic expansion valve according to claim 7, characterized in that, The cover (41) includes a top plate and a circumferential sidewall, the circumferential sidewall surrounding the outer edge of the top plate, and the end of the circumferential sidewall protruding from the inner surface of the top plate; The bottom wall of the first connecting groove (411) is part of the inner surface of the top plate; a sealing element is provided between the first connecting groove (411) and the first annular protrusion (241).

12. The electronic expansion valve according to claim 11, characterized in that, The first connecting groove (411) has a stepped notch at one end facing the valve body (10), and the seal corresponding to the first connecting groove (411) is located inside the notch.

13. The electronic expansion valve according to claim 9, characterized in that, The cover (41) includes a top plate and a circumferential sidewall, the circumferential sidewall surrounding the outer edge of the top plate, and the end of the circumferential sidewall protruding from the inner surface of the top plate; The bottom wall of the second connecting groove (412) is part of the inner surface of the top plate; A seal is provided between the second connecting groove (412) and the second annular protrusion (311).

14. The electronic expansion valve according to claim 13, characterized in that, The second connecting groove (412) has a stepped notch at one end facing the valve body (10), and the seal corresponding to the second connecting groove (412) is located inside the notch.

15. The electronic expansion valve according to claim 3, characterized in that, A pressure plate (60) is provided on the valve body (10). Some of the sensors (30) are sandwiched between the pressure plate (60) and the valve body (10). The pressure plate (60) is fixedly connected to the valve body (10). Some of the pressure plate (60) is sandwiched between the cover (41) and the valve body (10). The cover (41) is fixedly connected to the valve body (10).

16. The electronic expansion valve according to claim 3, characterized in that, At least a portion of the conductive element (42) is injection molded into the cover (41).

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