Electronic expansion valves, refrigeration equipment and vehicles

Abstract

This utility model discloses an electronic expansion valve, a refrigeration device, and a vehicle, relating to the field of fluid control component technology. The electronic expansion valve includes a valve body, a valve core assembly, a valve port seat, and a seal. The valve body has a valve cavity, a flow hole, and an installation channel, with the flow hole and installation channel communicating with the valve cavity. The valve core assembly is movably disposed within the valve cavity. The valve port seat is installed in the installation channel and has a first valve port communicating with the valve cavity; the valve core assembly is used to open or close the first valve port. The seal is interference-fitted between the outer periphery of the valve port seat and the installation channel, and is located at the end of the valve port seat adjacent to the valve cavity. The technical solution provided by this utility model aims to reduce the risk of valve port seat deformation, ensure the sealing performance of the valve core assembly when closing the valve port, and improve the accuracy of the electronic expansion valve in regulating flow.

Description

Technical Field

[0001] This utility model relates to the field of fluid control components technology, and in particular to an electronic expansion valve, refrigeration equipment, and vehicle. Background Technology

[0002] In refrigeration equipment, electronic expansion valves are typically installed in the system piping to facilitate refrigerant flow control. In related technologies, these valves have a valve seat on the valve body, forming a valve port that connects to the valve cavity within the valve body. The valve seat cooperates with the valve core assembly to open and close the valve port. However, after the valve core assembly closes the valve port, due to the pressure difference of the refrigerant on both sides of the valve port, high-pressure refrigerant in the valve cavity can easily intrude between the valve seat and the valve body. This can cause deformation of the valve seat, making it difficult for the valve core assembly to effectively close the valve port, resulting in internal leakage in the electronic expansion valve, or obstructing the movement of the valve core assembly, affecting the accuracy of the electronic expansion valve's flow regulation. Utility Model Content

[0003] The main purpose of this invention is to provide an electronic expansion valve, refrigeration equipment, and vehicle, which aims to reduce the risk of valve seat deformation, ensure the sealing performance of the valve core assembly when closing the valve port, and improve the accuracy of the electronic expansion valve in regulating flow.

[0004] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:

[0005] The valve body is provided with a valve cavity, a flow hole and an installation channel, wherein the flow hole and the installation channel are connected to the valve cavity;

[0006] A valve core assembly, wherein the valve core assembly is movably disposed in the valve cavity;

[0007] A valve seat, mounted in the mounting channel, having a first valve port communicating with the valve cavity, the valve core assembly for opening or closing the first valve port; and

[0008] A sealing element, which is interference-fitted between the outer periphery of the valve seat and the mounting channel, and located at one end of the valve seat adjacent to the valve cavity.

[0009] In one embodiment, at least in the radial direction of the electronic expansion valve, the seal is interference-fitted between the outer periphery of the valve seat and the mounting channel.

[0010] In one embodiment, the interference fit of the seal in the radial direction of the electronic expansion valve is H, satisfying: 0.05mm≤H≤0.3mm.

[0011] In one embodiment, a limiting groove is recessed on the outer periphery of the valve seat, and the sealing element is installed in the limiting groove.

[0012] In one embodiment, the limiting groove is disposed through the valve seat in the axial direction of the electronic expansion valve, with the groove extending towards the side near the valve cavity, and the sealing member is sandwiched between the mounting channel and the valve seat in the axial direction of the electronic expansion valve.

[0013] In one embodiment, the limiting groove includes a first groove sidewall on the outer periphery of the valve seat and a second groove sidewall on the side of the valve seat facing the valve cavity, wherein the connection between the first groove sidewall and the second groove sidewall is set at a right angle or a near right angle.

[0014] In one embodiment, the electronic expansion valve further includes a pressure sleeve, the valve body has an abutment portion between the valve cavity and the mounting channel, the pressure sleeve is fixed to the mounting channel and located at the end of the valve seat opposite to the valve cavity, and the valve seat is interference-fitted between the pressure sleeve and the abutment portion.

[0015] In one embodiment, in the radial direction of the electronic expansion valve, the protrusion height of the abutment portion is less than the protrusion height of the valve seat, and the abutment portion and the valve core assembly have a gap.

[0016] In one embodiment, the protrusion height of the abutment gradually increases from the valve cavity to the mounting channel, and the protrusion height of the valve seat corresponding to the position of the first valve port gradually increases.

[0017] In one embodiment, the valve core assembly includes a first valve head and a second valve head. The first valve head is movably disposed in the valve cavity and is used to open or close the first valve port. The first valve head is provided with a channel cavity and a second valve port. The second valve port and the valve cavity are connected through the channel cavity. The second valve port and the first valve port are arranged in the same direction. The second valve head is movably disposed in the channel cavity and is used to open or close the second valve port.

[0018] In one embodiment, the valve seat is made of plastic.

[0019] In one embodiment, the valve seat is made of polytetrafluoroethylene or polypropylene, and contains between 10% and 30% glass fiber or carbon fiber.

[0020] In one embodiment, the seal is made of rubber.

[0021] In one embodiment, the seal is configured as a sealing ring.

[0022] This utility model also proposes a refrigeration device, which includes the aforementioned electronic expansion valve.

[0023] This utility model also proposes a vehicle that includes the refrigeration equipment as described above.

[0024] The technical solution of this utility model involves setting a valve seat in the installation channel of the valve body, and placing an interference fit seal between the valve seat and the installation channel, with the seal positioned near the valve cavity. Thus, after the valve core assembly abuts against the valve seat and closes the first valve port, refrigerant enters the valve cavity through the flow passage. At this time, a pressure difference is generated between the channel away from the valve cavity and the valve cavity due to the refrigerant. Because the seal is located near the valve cavity in the contact surface between the valve seat and the installation channel, it intercepts the refrigerant at the very beginning of its intrusion into the valve seat and installation channel. This reduces the risk of refrigerant intrusion into the valve seat and installation channel, ensuring that the outer wall of the valve seat fits tightly against the installation channel. This maintains pressure balance on the side of the valve seat relative to the installation channel and the side away from the installation channel, reducing the risk of valve seat deformation and ensuring the sealing performance of the valve core assembly when closing the first valve port. This also reduces the risk of reduced energy efficiency of the electronic expansion valve due to internal leakage and ensures the accuracy of the electronic expansion valve in regulating the refrigerant flow. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A cross-sectional view of an embodiment of the electronic expansion valve provided by this utility model;

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 1 A sectional view of the middle valve body;

[0029] Figure 4 for Figure 1 Cross-sectional view of the valve seat;

[0030] Figure 5 for Figure 4 Top view of the valve seat;

[0031] Figure 6 for Figure 1 Cross-sectional view of the valve core assembly.

[0032] Explanation of icon numbers:

[0033] 100, Valve body; 110, Valve cavity; 120, Flow hole; 130, Mounting channel; 140, Abutment part; 200, Valve core assembly; 210, First valve head; 220, Channel cavity; 230, Second valve port; 240, Second valve head;

[0034] 300, valve seat; 310, limiting groove; 311, first groove sidewall; 312, second groove sidewall; 320, first valve port; 400, sealing element; 500, pressure sleeve.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] This utility model proposes an electronic expansion valve.

[0040] Please refer to Figures 1 to 3 In one embodiment of this utility model, the electronic expansion valve includes:

[0041] The valve body 100 is provided with a valve cavity 110, a flow hole 120 and an installation channel 130, and the flow hole 120 and the installation channel 130 are connected to the valve cavity 110.

[0042] Valve core assembly 200 is movably disposed in valve cavity 110;

[0043] Valve seat 300, mounted in mounting channel 130, valve seat 300 having a first valve port 320 communicating with valve chamber 110, valve core assembly 200 for opening or closing the first valve port 320; and

[0044] The seal 400 is interference-fitted between the outer periphery of the valve seat 300 and the mounting channel 130, and is located at one end of the valve seat 300 adjacent to the valve cavity 110.

[0045] The technical solution of this utility model involves providing a valve seat 300 within the mounting channel 130 of the valve body 100, and placing an interference fit seal 400 between the valve seat 300 and the mounting channel 130, with the seal 400 positioned near the valve cavity 110. Thus, after the valve core assembly 200 abuts against the valve seat 300 and closes the first valve port 320, refrigerant enters the valve cavity 110 through the flow hole 120. At this time, a pressure difference is generated between the valve seat 300 away from the valve cavity 110 and the valve cavity 110 due to the refrigerant. Because the seal 400 is located near the valve cavity 110 on the contact surface between the valve seat 300 and the mounting channel 130, a pressure difference is created between the valve seat 300 and the valve cavity 110. As soon as the refrigerant begins to enter the valve seat 300 and the mounting channel 130, the seal 400 intercepts the refrigerant, thereby reducing the risk of refrigerant in the valve cavity 110 entering the valve seat 300 and the mounting channel 130. This ensures that the outer wall of the valve seat 300 can fit tightly against the mounting channel 130, thus ensuring pressure balance on the side of the valve seat 300 relative to the mounting channel 130 and the side away from the mounting channel 130. This reduces the risk of deformation of the valve seat 300, ensures the sealing of the valve core assembly 200 when closing the first valve port 320, reduces the risk of reduced energy efficiency of the electronic expansion valve due to internal leakage, and also ensures the accuracy of the electronic expansion valve in regulating the refrigerant flow.

[0046] It is understandable that after the valve core assembly 200 closes the first valve port 320, the shape of the valve port seat 300 remains stable. Compared with the prior art where refrigerant enters between the valve port seat 300 and the installation channel 130, this solution avoids deformation of the valve port seat 300. For example, it avoids the problem that the valve port seat 300 protrudes and deforms at the position of the first valve port 320, causing the position of the valve core assembly 200 to shift upward when closing the first valve port 320, resulting in a larger valve opening pulse. It also avoids the problem that the valve core assembly 200 is unable to tightly close the first valve port 320 due to deformation of the valve port seat 300, resulting in internal leakage of the electronic expansion valve and affecting the cooling efficiency. The electronic expansion valve can be a single valve port, that is, only the valve port seat 300 is provided with a first valve port 320, or it can be a double valve port. While the valve core assembly 200 controls the opening and closing of the first valve port 320, the valve core assembly 200 is also provided with another valve port of a smaller size. The valve head on the valve core assembly 200 controls the opening and closing of this valve port, thereby improving the accuracy of refrigerant flow regulation.

[0047] It should be noted that the valve seat 300 and the mounting channel 130 are in close contact. This can be achieved by bonding or fusing the valve seat 300 to the wall of the mounting channel 130, or by providing a pressure sleeve 500 on the side of the mounting channel 130 away from the valve cavity 110, clamping the valve seat 300 into the end of the mounting channel 130 near the valve cavity 110. Furthermore, the end of the valve seat 300 adjacent to the valve cavity 110 can be understood as follows: in the axial direction of the electronic expansion valve, between the middle of the valve seat 300 and the valve cavity 110, the materials of the sealing element 400 and the valve seat 300 are not the same. The sealing element 400 is more easily deformed and has a better sealing effect. The sealing element 400 can be located between the outer peripheral wall of the valve seat 300 and the mounting channel 130, or it can be located in the relative gap between the valve seat 300 and the mounting channel 130 in the axial direction of the electronic expansion valve. In this technical solution, the axial, circumferential, and radial directions are all referenced to the electronic expansion valve. For example, the valve core assembly 200 moves along the axial direction of the electronic expansion valve to open and close the first valve port 320.

[0048] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 6The valve core assembly 200 includes a first valve head 210 and a second valve head 240. The first valve head 210 is movably disposed in the valve cavity 110 and is used to open or close the first valve port 320. The first valve head 210 is provided with a channel cavity 220 and a second valve port 230. The second valve port 230 and the valve cavity 110 are connected through the channel cavity 220. The second valve port 230 and the first valve port 320 are arranged in the same direction. The second valve head 240 is movably disposed in the channel cavity 220 and is used to open or close the second valve port 230. It can be understood that the electronic expansion valve in this embodiment has two valve ports. The size of the first valve port 320 is larger than the size of the second valve port 230, and the first valve port 320 and the second valve port 230 are arranged in series to form a two-stage throttling structure. After the first valve port 320 is closed by the first valve head 210, the second valve head 240 can open and close the second valve port 230. Because the second valve port 230 is smaller, fine-tuning of the refrigerant flow can be achieved by precisely controlling the position of the second valve head 240. Combined with the wide-range opening adjustment of the first valve port 320 by the first valve head 210, wide-range, high-precision flow control is thus realized. Simultaneously, relying solely on the first valve port 320 for throttling can easily generate significant fluid impact, vibration, and noise. The two-stage throttling structure allows the refrigerant pressure to decrease gradually, mitigating the impact effect of high-speed flow and improving the stability of valve operation.

[0049] It should be noted that during the opening and closing of the first valve port 320 and the second valve port 230 by the valve core assembly 200, the second valve head 240 first moves towards the mounting channel 130, thereby driving the first valve head 210 to move towards the valve seat 300. After the first valve head 210 closes the first valve port 320, the second valve head 240 continues to move to close the second valve port 230. Conversely, during the opening of the first valve port 320 and the second valve port 230, the second valve head 240 first moves away from the mounting channel 130 to open the second valve port 230, thereby driving the first valve head 210 to move away from the valve seat 300 to open the first valve port 320. Both the end of the first valve head 210 away from the first valve port 320 and the end of the second valve head 240 away from the second valve head 240 are equipped with return springs. These return springs ensure that in the event of a failure in the electronic control of the electronic expansion valve, the first valve head 210 and the second valve head 240 can be pushed to close the first valve port 320 and the second valve port 230 respectively. Thus, when the first valve head 210 closes the first valve port 320 and the second valve head 240 opens the second valve port 230, the first valve head 210 relies on the force provided by the return spring and the contact relationship with the first valve port 320. At this time, the force on the valve seat 300 is weaker than when both the first valve port 320 and the second valve port 230 are closed, which weakens the tight contact between the valve seat 300 and the mounting channel 130. At this time, the refrigerant in the valve cavity 110 can more easily invade between the valve seat 300 and the mounting channel 130. By positioning the seal 400 near the valve cavity 110, the refrigerant is intercepted in the early stage of invading between the valve seat 300 and the mounting channel 130, thereby ensuring the morphological stability of the valve seat 300 and the operational stability of the electronic expansion valve. Of course, in other embodiments, the electronic expansion valve can also be configured as a single valve port, with the refrigerant flow rate regulated through the first valve port 320.

[0050] In one embodiment, regarding the direction of interference deformation of the seal 400, please refer to... Figure 2In the radial direction of the electronic expansion valve, the seal 400 is interference-fitted between the outer periphery of the valve seat 300 and the mounting channel 130. It should be noted that the mounting channel 130 and the valve seat 300 have portions that abut against each other along the axial direction of the electronic expansion valve, and a stable abutment relationship needs to be maintained between the valve seat 300 and the mounting channel 130 in the axial direction. Thus, limiting the interference deformation of the seal 400 in the radial direction of the electronic expansion valve ensures, on the one hand, that the seal 400 can fit tightly between the outer periphery of the valve seat 300 and the inner wall of the mounting channel 130, effectively preventing refrigerant leakage from the high-pressure side to the low-pressure side; on the other hand, it also reduces the risk of deformation of the valve seat 300, helping to maintain the structural integrity and shape stability of the valve seat 300, and ensuring the sealing performance when the first valve port 320 is closed. In the case where the seal 400 is arranged around the outer periphery of the valve seat 300, the seal 400 is radially interference-fitted between the outer periphery of the valve seat 300 and the inner wall of the mounting channel 130, ensuring a tight seal between the valve seat 300 and the mounting channel 130 at the position of the seal 400. Alternatively, in other embodiments, when the seal 400 is positioned on the axial end of the valve seat 300 opposite to the mounting channel 130, the seal 400 is axially interference-fitted between the valve seat 300 and the mounting channel 130.

[0051] Furthermore, in this embodiment, please refer to Figure 2 The interference fit of seal 400 in the radial direction of the electronic expansion valve is H, satisfying: 0.05mm ≤ H ≤ 0.3mm. For example... Figure 2As shown, the seal 400 has interference-fit portions on both radial sides of the electronic expansion valve. For example, the interference amount near the first valve port 320 is H1, and the interference amount near the mounting channel 130 is H2. Then H is the sum of H1 and H2. In this embodiment, H1 and H2 are equal or nearly equal. Thus, limiting H to between 0.05 mm and 0.3 mm ensures that the valve seat 300 can compress the seal 400 to the mounting channel 130, generating a certain preload on the seal 400, thereby forming a reliable sealing interface between the valve seat 300 and the mounting channel 130. Within the above range, the seal 400 can achieve appropriate compression deformation, avoiding both insufficient compression leading to loss of sealing ability and excessive compression causing material failure or assembly difficulties. Furthermore, within the aforementioned range, H can compensate for the tolerances caused by the machining progress between the valve seat 300 and the mounting channel 130, ensuring the sealing performance of the seal 400 over the gap between the valve seat 300 and the mounting channel 130. H can be values ​​such as 0.05mm, 0.08mm, 0.14mm, 0.17mm, 0.21mm, 0.25mm, 0.28mm, or 0.3mm. Of course, in other embodiments, depending on the specifications of the electronic expansion valve, the value of H can also be limited to between 0.3mm and 0.5mm.

[0052] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 5 A limiting groove 310 is recessed on the outer periphery of the valve seat 300, and the sealing element 400 is installed in the limiting groove 310. It can be understood that, on the one hand, the limiting groove 310 provides a clear installation position for the sealing element 400, preventing it from shifting or twisting during assembly, ensuring assembly consistency, and avoiding sealing failure due to misalignment of the sealing element 400. On the other hand, after the sealing element 400 is constrained to the outer periphery of the valve seat 300 by the limiting groove 310, the deformation direction of the sealing element 400 is more controllable under radial interference compression, thereby ensuring that the sealing element 400 seals the valve seat 300 and the mounting channel 130 radially, improving the sealing performance of the sealing element 400. Furthermore, the limiting groove 310 provides multiple directions for the deformation of the sealing element 400, so that the sealing element 400 forms multiple sealing contact surfaces between the valve seat 300 and the mounting channel 130, thereby improving the sealing performance of the sealing element 400 between the valve seat 300 and the mounting channel 130. Of course, in other embodiments, the limiting groove 310 may be disposed on the channel wall of the mounting channel 130 facing the valve seat 300, or the limiting groove 310 may be disposed on the end wall of the valve seat 300 distributed axially in the electronic expansion valve.

[0053] Furthermore, in this embodiment, please refer to Figure 4 and Figure 5In the axial direction of the electronic expansion valve, a limiting groove 310 is provided through the valve seat 300 on the side closer to the valve cavity 110. The sealing element 400 is clamped between the mounting channel 130 and the valve seat 300 in the axial direction of the electronic expansion valve. It can be understood that the limiting groove 310 is located on the outer periphery of the valve seat 300 near the valve cavity 110. The sealing element 400, within the limiting groove 310, can be clamped between the valve seat 300 and the mounting channel 130 in both the axial and circumferential directions, respectively, improving the sealing performance of the sealing element 400 between the valve seat 300 and the mounting channel 130. When the valve seat 300 is installed in a clamping manner at one end of the mounting channel 130 adjacent to the valve cavity 110, the limiting groove 310 provided at one corner of the valve seat 300 can either clamp the seal 400 axially between the valve seat 300 and the mounting channel 130 by clamping the valve seat 300, or guide the seal 400 to deform radially, so that the seal 400 is radially interference-fitted between the valve seat 300 and the mounting channel 130, thereby improving the installation convenience of the valve seat 300 and the seal 400. It should be noted that the axial interference fit of the seal 400 is relatively lower than the radial interference fit to reduce interference with the stability of the valve seat 300 when clamped axially, thus ensuring that the area of ​​the valve seat 300 other than the area abutting the seal 400 is in tight contact with the mounting channel 130, ensuring the sealing performance between the valve seat 300 and the mounting channel 130. Of course, in other embodiments, the limiting groove 310 can also be recessed from the outer periphery of the valve seat 300 and located at one end of the valve seat 300 near the valve cavity 110, and have opposing groove sidewalls in the axial direction.

[0054] Specifically, in this embodiment, please refer to Figure 2 and Figure 4The limiting groove 310 includes a first groove sidewall 311 on the outer periphery of the valve seat 300 and a second groove sidewall 312 on the side of the valve seat 300 facing the valve cavity 110. The connection between the first groove sidewall 311 and the second groove sidewall 312 is set at a right angle or near a right angle. It can be understood that at the inside corner of the limiting groove 310, the inside corner is a square corner rather than an arc corner. On the one hand, the first groove sidewall 311 restricts the radial movement of the seal 400, and the second groove sidewall 312 restricts its axial movement, which can prevent the seal 400 from rotating, sliding or falling off during assembly or use. On the other hand, in the right angle or near a right angle limiting groove 310, when the seal 400 is pressed, it will undergo controllable compression and expansion along the groove wall direction, better constraining the deformation path of the seal 400, which helps to form a more uniform sealing pressure distribution, thereby improving the sealing performance. Of course, in other embodiments, ribs or serrated structures can be provided on the sidewall of the limiting groove 310 to enhance the contact force with the sealing member 400, thereby improving the sealing performance of the sealing member 400 between the valve seat 300 and the mounting channel 130.

[0055] In one embodiment, please refer to Figure 1 and Figure 3The electronic expansion valve also includes a pressure sleeve 500. The valve body 100 has an abutment portion 140 between the valve cavity 110 and the mounting channel 130. The pressure sleeve 500 is fixed to the mounting channel 130 and located at the end of the valve seat 300 opposite to the valve cavity 110. The valve seat 300 is interference-fitted between the pressure sleeve 500 and the abutment portion 140. It can be understood that the valve seat 300 is fixed to the end of the mounting channel 130 adjacent to the valve cavity 110 by being clamped. Thus, the pressure sleeve 500 and the abutment portion 140 jointly apply axial pressure to the valve seat 300, clamping it and interfering-fitting it between the two, preventing the valve seat 300 from displacing, loosening, or falling off under high-pressure refrigerant impact or vibration conditions, and ensuring the stability of the valve core assembly 200 in opening and closing the first valve port 320. Meanwhile, during the operation of the refrigeration equipment, a significant pressure difference exists between the valve seat 300 and the valve cavity 110 and the channel within the valve seat 300. The axial clamping action of the pressure sleeve 500 and the abutment portion 140 on the valve seat 300 effectively resists the axial force caused by this pressure difference and reduces the effective area of ​​the valve cavity 110 acting on the valve seat 300, preventing the valve seat 300 from deforming or shifting due to uneven force. Referring to the aforementioned placement of the limiting groove 310, the sealing element 400 is axially clamped between the abutment portion 140 and the second groove sidewall 312, and radially clamped between the first groove sidewall 311 and the channel peripheral wall of the mounting channel 130. It should be noted that the abutment portion 140, as a solid structure, also belongs to the channel wall of the mounting channel 130 in the axial direction where it abuts against the valve seat 300. Of course, in other embodiments, the valve seat 300 can also be connected to the mounting channel 130 of the valve body 100 by means of bonding, vulcanization or other methods.

[0056] Furthermore, in this embodiment, please refer to Figure 2 and Figure 3 In the radial direction of the electronic expansion valve, the protrusion height of the abutment portion 140 is less than the protrusion height of the valve seat 300, and there is a gap between the abutment portion 140 and the valve core assembly 200. The valve core assembly 200 slides along the axial direction of the electronic expansion valve to open or close the first valve port 320. The abutment portion 140 and the valve core assembly 200 have a certain gap in the radial direction of the electronic expansion valve to ensure that the valve core assembly 200 can move freely during sliding without interference from the abutment portion 140. At the same time, the protrusion height of the abutment portion 140 is limited to be lower than the protrusion height of the valve seat 300 to ensure that the valve core assembly 200 can stably open or close the first valve port 320 during sliding, thereby avoiding affecting the operation of the electronic expansion valve. Here, the protrusion height of the abutment portion 140 is understood as the maximum protrusion height of the abutment portion 140, and the protrusion height of the valve seat 300 is understood as the maximum protrusion height of the valve seat 300 at any position between the position of the first valve port 320 and the abutment portion 140.

[0057] Furthermore, in this embodiment, please refer to Figures 2 to 4 From the valve cavity 110 to the mounting channel 130, the protrusion height of the abutment portion 140 gradually increases, and the protrusion height of the valve seat 300 corresponding to the position of the first valve port 320 gradually increases. It can be understood that from the valve cavity 110 to the mounting channel 130, the radial dimension of the channel connecting the valve cavity 110 to the first valve port 320 of the electronic expansion valve gradually decreases, resulting in an inclined surface at the protruding end of the abutment portion 140 and an inclined surface on the valve seat 300 corresponding to the position of the first valve port 320. For the contact portion 140, when the valve core assembly 200 opens the first valve port 320, it can guide the refrigerant to flow along the first valve port 320; or, when the first valve head 210 closes the first valve port 320 and the second valve head 240 opens the second valve port 230, it can reduce the refrigerant retention in the valve cavity 110 so that the refrigerant can flow from the passage cavity 220 towards the second valve port 230. For the valve port seat 300, the inclined surface provided at the position corresponding to the first valve port 320 can, on the one hand, guide the refrigerant to flow out along the first valve port 320 when the valve core assembly 200 opens the first valve port 320, and on the other hand, it also provides a contact surface for the cooperation between the first valve port 320 and the valve core assembly 200, thereby improving the sealing performance of the valve core assembly 200 when closing the first valve port 320 and the stability of the first valve port 320 after multiple opening and closing. Of course, in other embodiments, the position of the valve core assembly 200 relative to the first valve port 320 may be such that a limiting slope is provided on the radial end side of the electronic expansion valve, so that the radial dimension of the valve core assembly 200 gradually decreases in the direction of sliding toward the first valve port 320, so that a stop sealing pair is formed between the valve core assembly 200 and the first valve port 320, that is, the valve core assembly 200 closes the first valve port 320 to form a limit position, and after the valve core assembly 200 closes the first valve port 320, the first valve port 320 has good sealing performance.

[0058] In one embodiment, please refer to Figure 2 and Figure 4The valve seat 300 is made of plastic. It should be noted that the valve body 100 is made of alloy. The plastic valve seat 300 has a certain degree of deformation capability, allowing it to cooperate with the valve core assembly 200. After the valve core assembly 200 closes the first valve port 320, it ensures the sealing of the first valve port 320. Simultaneously, during the installation of the valve seat 300 into the installation channel 130 using the pressure sleeve 500, the deformation capability of the valve seat 300 ensures that it tightly abuts against the channel wall of the installation channel 130 after being clamped, and guides the deformation of the sealing element 400, thereby ensuring the sealing between the valve seat 300 and the wall of the installation channel 130. Furthermore, the valve seat 300 may be made of polytetrafluoroethylene or polypropylene, and contain 10% to 30% glass fiber or carbon fiber. It is understood that polytetrafluoroethylene (PTFE) has excellent chemical inertness and corrosion resistance, making it suitable for use in environments where it comes into contact with various refrigerants, ensuring the stability of the valve seat 300. Polypropylene also resists the chemical corrosion of various refrigerants well and is less expensive. Thus, using a material with a low coefficient of friction reduces friction between the valve core assembly 200 and the valve seat 300, improving the smoothness of opening and closing the first valve port 320 of the electronic expansion valve. Specifically, the valve seat 300 incorporates 10% to 30% glass fiber or carbon fiber (by weight) to enhance its tensile strength, flexural strength, and impact resistance, enabling it to withstand higher internal pressure and external stress. This meets the durability requirements of repeated opening and closing of the first valve port 320 by the valve core assembly 200 and ensures a tight fit with the mounting channel 130. Of course, in other embodiments, depending on different usage requirements, the valve seat 300 may be made of a fluoroelastomer.

[0059] Based on the requirements between the sealing element 400, the sealing valve seat 300, and the mounting channel 130, in one embodiment, please refer to... Figure 2The sealing element 400 is made of rubber, which has good elasticity and compression recovery. It maintains pressure on the contact surface after installation and can fill minor surface defects and irregularities, ensuring a tight seal even on less-than-ideal contact surfaces, thus forming an effective seal. Simultaneously, a suitable rubber type can be selected based on the specific refrigerant type to resist corrosion from refrigerant, lubricating oil, and other chemicals, and adapt to the temperature environment of the electronic expansion valve. The sealing element 400 is configured as a sealing ring, continuously arranged on the outer periphery of the valve seat 300. It forms a seal at any position in the circumferential direction of the electronic expansion valve where the valve cavity 110 intrudes into the gap between the valve seat 300 and the mounting channel 130, ensuring an effective and stable seal at positions near the valve cavity 110 and between the valve seat 300 and the mounting channel 130. Of course, in other embodiments, the sealing element 400 can also be made of thermoplastic elastomer or polyurethane elastomer.

[0060] This utility model also proposes a refrigeration device, which includes an electronic expansion valve. The specific structure of the electronic expansion valve is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. This refrigeration device can be configured as various types of equipment such as refrigerators, air conditioners, and heat pump water heaters.

[0061] This utility model also proposes a vehicle that includes a refrigeration device. The specific structure of the refrigeration device is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0062] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An electronic expansion valve, characterized in that, include: The valve body is provided with a valve cavity, a flow hole and an installation channel, wherein the flow hole and the installation channel are connected to the valve cavity; A valve core assembly, wherein the valve core assembly is movably disposed in the valve cavity; A valve seat is installed in the mounting channel and has a first valve port communicating with the valve cavity. The valve core assembly is used to open or close the first valve port. as well as A sealing element, which is interference-fitted between the outer periphery of the valve seat and the mounting channel, and located at one end of the valve seat adjacent to the valve cavity.

2. The electronic expansion valve as described in claim 1, characterized in that, At least in the radial direction of the electronic expansion valve, the seal is interference-fitted between the outer periphery of the valve seat and the mounting channel.

3. The electronic expansion valve as described in claim 2, characterized in that, The interference fit of the seal in the radial direction of the electronic expansion valve is H, which satisfies: 0.05mm≤H≤0.3mm.

4. The electronic expansion valve as described in claim 1, characterized in that, The valve seat has a limiting groove recessed on its outer periphery, and the sealing element is installed in the limiting groove.

5. The electronic expansion valve as described in claim 4, characterized in that, In the axial direction of the electronic expansion valve, the limiting groove is disposed through the valve seat on the side closer to the valve cavity, and the sealing element is sandwiched between the mounting channel and the valve seat in the axial direction of the electronic expansion valve.

6. The electronic expansion valve as described in claim 5, characterized in that, The limiting groove includes a first groove sidewall on the outer periphery of the valve seat and a second groove sidewall on the side of the valve seat facing the valve cavity, wherein the connection between the first groove sidewall and the second groove sidewall is set at a right angle or a near right angle.

7. The electronic expansion valve as described in claim 1, characterized in that, The electronic expansion valve further includes a pressure sleeve, and the valve body has an abutment portion between the valve cavity and the mounting channel. The pressure sleeve is fixed to the mounting channel and located at the end of the valve seat opposite to the valve cavity. The valve seat is interference-fitted between the pressure sleeve and the abutment portion.

8. The electronic expansion valve as described in claim 7, characterized in that, In the radial direction of the electronic expansion valve, the protrusion height of the abutment portion is less than the protrusion height of the valve seat, and the abutment portion and the valve core assembly have a gap; And / or, in the direction from the valve cavity to the mounting channel, the protrusion height of the abutment gradually increases, and the protrusion height of the valve seat corresponding to the position of the first valve port gradually increases.

9. The electronic expansion valve as described in any one of claims 1 to 8, characterized in that, The valve core assembly includes a first valve head and a second valve head, wherein the first valve head is movably disposed in the valve cavity and is used to open or close the first valve port; The first valve head is provided with a channel cavity and a second valve port. The second valve port and the valve cavity are connected to the channel cavity. The second valve port and the first valve port are arranged in the same direction. The second valve head is movably disposed in the channel cavity and is used to open or close the second valve port.

10. The electronic expansion valve as described in any one of claims 1 to 8, characterized in that, The valve seat is made of plastic.

11. The electronic expansion valve as described in claim 10, characterized in that, The valve seat is made of polytetrafluoroethylene or polypropylene, and contains 10% to 30% glass fiber or carbon fiber.

12. The electronic expansion valve as described in any one of claims 1 to 8, characterized in that, The sealing element is made of rubber, and / or the sealing element is configured as a sealing ring.

13. A refrigeration device, characterized in that, Includes the electronic expansion valve as described in any one of claims 1 to 12.

14. A vehicle, characterized in that, Includes the refrigeration equipment as described in claim 13.

Images