Electronic expansion valve assembly, electronic expansion valve and refrigeration equipment

Abstract

This invention discloses an electronic expansion valve assembly, an electronic expansion valve, and a refrigeration device. The electronic expansion valve assembly includes a connecting seat and a guide sleeve; the guide sleeve is riveted to the connecting seat. The electronic expansion valve assembly of this invention can improve the production efficiency of electronic expansion valve assemblies.

Description

Technical Field

[0001] This invention relates to the field of fluid control components, and in particular to an electronic expansion valve assembly, an electronic expansion valve, and a refrigeration device. Background Technology

[0002] The electronic expansion valve is an important component in a refrigeration system, primarily functioning to throttle and reduce pressure and regulate flow. In related technologies, the electronic expansion valve includes components such as a valve seat assembly, a nut assembly, a valve needle assembly, and a magnetic rotor assembly. The valve seat assembly has a valve port. When the electronic expansion valve operates, an energized coil surrounding the valve housing drives the magnetic rotor assembly to rotate, thereby causing the valve needle assembly to move axially, thus controlling the opening or closing of the valve port, achieving the functions of throttling and reducing pressure and regulating flow.

[0003] In existing electronic expansion valves, the connection between the connector and the guide sleeve is usually achieved by first assembling the connector and the guide sleeve together using assembly equipment, and then welding them together using welding equipment. The whole process requires two pieces of equipment, which is cumbersome and time-consuming, resulting in low production efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide an electronic expansion valve assembly that aims to improve the production efficiency of electronic expansion valve assemblies.

[0005] To achieve the above objectives, the present invention provides an electronic expansion valve assembly, which includes a connecting seat and a guide sleeve; the guide sleeve is riveted to the connecting seat.

[0006] In one embodiment, the connecting seat has a first through hole and a second through hole communicating with the first through hole, the lower end face of the first through hole forming a riveting surface; the guide sleeve includes a guide portion, the guide portion extending into the second through hole and abutting against the riveting surface through its own deformation.

[0007] In one embodiment, the guide sleeve further includes a mounting portion, the guide portion being connected to the mounting portion, and the outer diameter of the mounting portion being not less than the outer diameter of the guide portion.

[0008] In one embodiment, the guide sleeve further includes a body portion connected to the mounting portion, the upper end surface of the body portion forming a first limiting portion, the first limiting portion abutting against the lower end surface of the connecting seat.

[0009] In one embodiment, the difference between the outer diameter of the guide portion and the outer diameter of the mounting portion is D, where 2mm ≥ D ≥ 0.005mm.

[0010] In one embodiment, the difference between the outer diameter of the guide portion and the outer diameter of the mounting portion is D, where 0.5mm ≥ D ≥ 0.005mm.

[0011] In one embodiment, the width of the riveting surface is M1, the guide portion includes a first guide portion located in the first through hole and a second guide portion located in the second through hole, the first guide portion and the second guide portion are connected, the height of the first guide portion is H1, and M1≥H1≥0.2M1.

[0012] In one embodiment, the connecting seat has a first through hole and a second through hole and a third through hole communicating with the first through hole, and the upper end face of the third through hole forms a second limiting part; the guide sleeve includes a mounting part and a shoulder, the mounting part is connected to the shoulder, the mounting part extends into the second through hole, the shoulder is disposed in the third through hole, and the upper end face of the shoulder abuts against the second limiting part.

[0013] In one embodiment, the lower end of the connector is provided with a riveting portion that protrudes downward, and the riveting portion abuts against the lower end face of the shoulder through its own deformation.

[0014] In one embodiment, the width of the lower end face of the shoulder is M2, and the height of the riveting part is H2, where M2≥H2≥0.2M2.

[0015] In one embodiment, the connecting seat is made of stainless steel, the guide sleeve is made of aluminum alloy, and the connecting seat and the guide sleeve are riveted together.

[0016] The present invention also proposes an electronic expansion valve, which includes a valve seat and an electronic expansion valve assembly, the electronic expansion valve assembly being mounted on the valve seat. The electronic expansion valve assembly includes a connecting seat and a guide sleeve; the guide sleeve is riveted to the connecting seat.

[0017] The present invention also proposes a refrigeration device, the refrigeration device including the electronic expansion valve. The electronic expansion valve includes a valve seat and an electronic expansion valve assembly, the electronic expansion valve assembly being mounted on the valve seat. The electronic expansion valve assembly includes a connecting seat and a guide sleeve; the guide sleeve is riveted to the connecting seat.

[0018] In one embodiment, the refrigeration equipment is an air conditioner, a freezer, a refrigerator, or a heat pump water heater.

[0019] The electronic expansion valve assembly of the present invention includes a connecting seat and a guide sleeve; the guide sleeve is riveted to the connecting seat. The riveting process is less frequent and faster, thus improving the production efficiency of the electronic expansion valve assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the electronic expansion valve of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the valve seat structure of the electronic expansion valve;

[0023] Figure 3 This is a schematic diagram of the structure of an embodiment of the electronic expansion valve assembly of the present invention;

[0024] Figure 4 for Figure 3 A schematic diagram of the structure before riveting;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 for Figure 3 A schematic diagram of the structure after riveting;

[0027] Figure 7 This is a schematic diagram of another embodiment of the electronic expansion valve assembly of the present invention;

[0028] Figure 8 for Figure 7 A schematic diagram of the structure before riveting;

[0029] Figure 9 for Figure 7 A schematic diagram of the structure after riveting.

[0030] Explanation of icon numbers:

[0031]

[0032]

[0033] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention 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 certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this invention 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, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. 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 invention.

[0037] This invention proposes an embodiment of an electronic expansion valve assembly. The electronic expansion valve is an important component in a refrigeration system, primarily functioning to throttle and reduce pressure and regulate flow. Existing electronic expansion valves include a valve seat, a nut assembly, and a valve needle assembly threaded into the nut assembly. A magnetic rotor assembly drives the valve needle assembly to generate axial movement, adjusting the valve opening and thus controlling the flow of the medium. The electronic expansion valve assembly of this invention separates the connecting seat and the guide sleeve, connecting them by riveting to improve assembly efficiency.

[0038] The electronic expansion valve assembly of this invention can be applied to air conditioning systems. The fluid medium flowing through the electronic expansion valve is the refrigerant used for heat exchange in the air conditioning system. In this case, the electronic expansion valve is installed at the evaporator inlet of the air conditioning system. As a boundary element between the high-pressure side and the low-pressure side of the air conditioning system, the electronic expansion valve throttles and reduces the pressure of the high-pressure liquid refrigerant from devices such as the receiver-drier, thereby regulating and controlling the amount of liquid refrigerant entering the evaporator, so that the amount of liquid refrigerant can meet the requirements of the external cooling load. Alternatively, the electronic expansion valve can be applied to other types of refrigeration equipment. The fluid medium flowing through the electronic expansion valve can also be other fluid media besides refrigerant, as long as the electronic expansion valve can achieve throttling and pressure reduction of such fluid media, without specific limitations.

[0039] Please see Figures 1 to 9 In one embodiment of the present invention, the electronic expansion valve assembly includes a connecting seat 200 and a guide sleeve 300; the guide sleeve 300 is riveted to the connecting seat 200.

[0040] Specifically, the electronic expansion valve assembly is mounted on the valve seat 100 of the electronic expansion valve 10. One end of the valve seat 100 has a port 110, and a valve cavity 120 communicating with the port 110 is formed within the valve seat 100. The connecting seat 200 is disposed at the port 110, and the guide sleeve 300 is disposed in the valve cavity 120. It should be emphasized that the valve seat 100 can be a valve seat specifically designed to mount the electronic expansion valve assembly, forming a single electronic expansion valve 10. Alternatively, the valve seat 100 can be a valve seat 100 of an integrated module, on which the electronic expansion valve assembly of this application, as well as other structural components, can be mounted. The valve seat 100 can be manufactured from stainless steel, aluminum, or other materials; no specific limitations are imposed. The shape of the valve seat 100 can be cylindrical, square, or other irregularly shaped. One end of the valve seat 100 has a port 110, which is specifically a stepped hole. A connecting seat 200 is fixedly installed in the stepped hole. For easy disassembly and assembly, the connecting seat 200 can be threaded to the inner wall of the stepped hole. The valve seat 100 also has a valve cavity 120, which communicates with the port 110. A first interface 130 and a second interface 140 can also be provided on the valve seat 100. The first interface 130 and the second interface 140 are used to connect pipes. The first interface 130 and the second interface 140 can be connected through the valve cavity 120, so that the fluid medium can enter from the first interface 130, pass through the valve cavity 120, and flow out from the second interface 140; conversely, the fluid medium can also enter from the second interface 140, pass through the valve cavity 120, and flow out from the first interface 130. That is, the fluid medium can flow into the valve cavity 120 from either the first interface 130 or the second interface 140 and flow out from the other interface. In this embodiment, the fluid medium flows into the valve chamber 120 from the first interface 130 and flows out from the second interface 140.

[0041] The guide sleeve 300 is disposed in the valve cavity 120 and located below the connecting seat 200. In this application, the connecting seat 200 has a larger outer diameter, while the guide sleeve 300 has a smaller outer diameter. The two are disposed separately and then riveted together. Compared to the traditional solution of integrally disposing of the guide sleeve 300 and the connecting seat 200, the technical solution of this application allows for smaller machining allowances and shorter machining times when the guide sleeve 300 and the connecting seat 200 are machined separately, thus improving production efficiency. Simultaneously, the smaller machining allowance further reduces raw material waste and lowers costs. Furthermore, machining the guide sleeve 300 and the connecting seat 200 separately reduces tool wear, eliminating the need for frequent tool replacements and extending tool life, further reducing costs.

[0042] Please see Figure 6 and Figure 9 The guide sleeve 300 is riveted to the connecting seat 200. Specifically, the guide sleeve 300 and the connecting seat 200 are connected by riveting. After riveting, the deformation at the connection point between the guide sleeve 300 and the connecting seat 200 is small, and the riveting method has low environmental requirements, making the riveted parts less prone to loosening. When welding the guide sleeve 300 and the connecting seat 200, they are usually first assembled together using assembly equipment, and then welded together using welding equipment. The entire process requires two machines. Compared to welding, connecting the guide sleeve 300 and the connecting seat 200 by riveting involves fewer steps, can be completed with only one machine, and takes less time, thus improving the production efficiency of the electronic expansion valve assembly.

[0043] Furthermore, the guide sleeve 300 and the connecting seat 200 are connected by riveting. In this case, the connecting seat 200 is made of stainless steel, and the guide sleeve 300 can be made of aluminum alloy. Aluminum alloy has the advantages of being lightweight, high-strength, having good sealing performance, being corrosion-resistant, and relatively low cost. Using an aluminum alloy guide sleeve 300 achieves weight reduction and can further reduce the production cost of the electronic expansion valve assembly.

[0044] Of course, in other embodiments, the guide sleeve 300 and the connecting seat 200 can also be connected by welding, snap-fitting or other connection methods, and there are no specific limitations on this.

[0045] The electronic expansion valve assembly of the present invention includes a connecting seat 200 and a guide sleeve 300; the guide sleeve 300 is riveted to the connecting seat 200. The riveting process is less and takes less time, thus improving the production efficiency of the electronic expansion valve assembly.

[0046] Please see Figures 3 to 6 In one embodiment, the connecting seat 200 has a first through hole 210 and a second through hole 220 communicating with the first through hole 210, and the lower end face of the first through hole 210 forms a riveting surface 211; the guide sleeve 300 includes a guide portion 310, which extends into the second through hole 220 and abuts against the riveting surface 211 by its own deformation.

[0047] Specifically, the outer diameter of the first through hole 210 is larger than the outer diameter of the second through hole 220. When the guide sleeve 300 is riveted to the connecting seat 200, a riveting surface 211 is formed at the connection between the first through hole 210 and the second through hole 220 (i.e., the lower end face of the first through hole 210). The guide part 310 extends into the second through hole 220 and from the second through hole 220 into the first through hole 210. Then, the edge of the guide part 310 is deformed by the riveting equipment to abut against the riveting surface 211, so as to fix the guide sleeve 300 and the connecting seat 200 together.

[0048] Furthermore, the guide sleeve 300 also includes a mounting portion 320, with the guide portion 310 connected to the mounting portion 320. The outer diameter of the mounting portion 320 is not less than the outer diameter of the guide portion 310. Specifically, the guide portion 310 is connected to the end of the mounting portion 320 near the port 110, the outer diameter of the mounting portion 320 is larger than the outer diameter of the guide portion 310, and the mounting portion 320 is tightly fitted to the second through hole 220. When the guide sleeve 300 is assembled with the connecting seat 200, since the outer diameter of the guide portion 310 is smaller than the outer diameter of the mounting portion 320, the guide portion 310 is first pressed into the second through hole 220, and then the mounting portion 320 is pressed into the second through hole 220. The guide portion 310 can guide the assembly of the guide sleeve 300, facilitating the pressing of the guide sleeve 300 into the second through hole 220.

[0049] Furthermore, the guide sleeve 300 also includes a body portion 330, which is connected to the mounting portion 320. A first limiting portion 331 is formed on the upper end surface of the body portion 330, and this first limiting portion 331 abuts against the lower end surface of the connecting seat 200. Specifically, the first limiting portion 331 can limit the upper end of the guide sleeve 300 to fix it, preventing the mounting portion 320 of the guide sleeve 300 from being excessively pressed into the second through hole 220.

[0050] Please see Figure 5 In one embodiment, the difference between the outer diameter of the guide portion 310 and the outer diameter of the mounting portion 320 is D, where 2mm ≥ D ≥ 0.005mm. Preferably, the difference between the outer diameter of the guide portion 310 and the outer diameter of the mounting portion 320 is D, where 0.5mm ≥ D ≥ 0.005mm, so that the guide portion 310 has a better guiding effect.

[0051] Please see Figure 4In one embodiment, the width of the riveting surface 211 is M1, the guide portion 310 includes a first guide portion 311 located in the first through hole 210 and a second guide portion 312 located in the second through hole 220, the first guide portion 311 and the second guide portion 312 are connected, the height of the first guide portion 311 is H1, and M1≥H1≥0.2M1.

[0052] Specifically, since the riveting of the guide sleeve 300 and the connecting seat 200 is actually achieved by the guide portion 310 extending into the second through hole 220 and abutting against the riveting surface 211 through its own deformation, the guide portion 310 should be at least partially located within the first through hole 210, and this part can deform to abut against the riveting surface 211. Further, the guide portion 310 includes a first guide portion 311 located within the first through hole 210 and a second guide portion 312 located within the second through hole 220. The deformable part is the first guide portion 311. Since the first guide portion 311 needs to deform to abut against the riveting surface 211, optionally, the height H1 of the first guide portion 311 should satisfy M1≥H1≥0.2M1, so that the first guide portion 311 can abut against the riveting surface 211. Preferably, after the first guide portion 311 abuts against the riveting surface 211, the first guide portion 311 also abuts against the inner wall of the first through hole 210 to further enhance the stability of the connection between the guide sleeve 300 and the connecting seat 200.

[0053] Please see Figures 7 to 9 In another embodiment, the connecting seat 200 has a first through hole 210 and a second through hole 220 and a third through hole 230 communicating with the first through hole 210. The upper end face of the third through hole 230 forms a second limiting portion 231. The guide sleeve 300 includes a mounting portion 320 and a shoulder 340. The mounting portion 320 is connected to the shoulder 340. The mounting portion 320 extends into the second through hole 220. The shoulder 340 is disposed in the third through hole 230, and the upper end face of the shoulder 340 abuts against the second limiting portion 231. In this embodiment, the guide sleeve 300 is riveted to the lower end of the connecting seat 200 without needing to extend into the first through hole 210 to abut against the riveting surface 211. Specifically, the second limiting part 231 abuts against the upper end surface of the shoulder 340. The second limiting part 231 can limit the upper end of the shoulder 340 to fix the guide sleeve 300 and prevent the guide sleeve 300 from being over-pressed into the second through hole 220.

[0054] Please see Figures 7 to 9In one embodiment, the lower end of the connecting seat 200 is provided with a riveting portion 260 protruding downwards. The riveting portion 260 abuts against the lower end face of the shoulder 340 through its own deformation. Specifically, the riveting of the guide sleeve 300 and the connecting seat 200 can be achieved by the riveting portion 260 abutting against the lower end face of the shoulder 340 through its own deformation. In this embodiment, the guide sleeve 300 is riveted to the lower end of the connecting seat 200 without needing to extend into the first through hole 210 to abut against the riveting surface 211, which is convenient and quick. The riveting portion 260 can be formed at the lower end of the connecting seat 200 and near the third through hole 230. Preferably, the riveting portion 260 is located at the periphery of the third through hole 230 and extends downwards from the lower end of the connecting seat 200. Furthermore, after the riveting part 260 abuts against the lower end face of the shoulder 340, the riveting part 260 also abuts against the outer wall surface of the guide sleeve 300 to further enhance the stability of the connection between the guide sleeve 300 and the connecting seat 200.

[0055] Please see Figure 8 In one embodiment, the width of the lower end face of the shoulder 340 is M2, and the height of the riveting portion 260 is H2, where M2 ≥ H2 ≥ 0.2M2. Specifically, since the riveting of the guide sleeve 300 and the connecting seat 200 is achieved by the riveting portion 260 abutting against the lower end face of the shoulder 340 through its own deformation, the height H2 of the riveting portion 260 should satisfy M2 ≥ H2 ≥ 0.2M2. The height of the riveting portion 260 is less than or equal to the width of the lower end face of the shoulder 340 to prevent interference when the riveting portion 260 abuts against the lower end face of the shoulder 340 after deformation.

[0056] Based on any of the above embodiments, the connecting seat 200 is made of stainless steel, and the guide sleeve 300 is made of aluminum alloy. The connecting seat 200 and the guide sleeve 300 are riveted together. Specifically, the guide sleeve 300 and the connecting seat 200 are connected by riveting. In this case, the connecting seat 200 is made of stainless steel, and the guide sleeve 300 can be made of aluminum alloy. Aluminum alloy has the advantages of being lightweight, high-strength, having good sealing performance, being corrosion-resistant, and having a relatively low cost. Using an aluminum alloy guide sleeve 300 can achieve weight reduction and further reduce the production cost of the electronic expansion valve assembly.

[0057] Please see Figure 3 and Figure 7Based on any of the above embodiments, the connecting seat 200 includes a positioning section 240 and an extension section 250 connected to the positioning section 240. The positioning section 240 is disposed at the port 110, and the extension section 250 extends into the valve cavity 120. The outer wall of the positioning section 240 is threadedly connected to the inner wall of the port 110. Specifically, the positioning section 240 has an external thread, and the inner wall surface of the port 110 has an internal thread. The threaded connection between the positioning section 240 and the inner wall surface of the port 110 facilitates the assembly and disassembly of the connecting seat 200 and the valve seat 100.

[0058] Please see Figure 1 and Figure 2 In one embodiment, the electronic expansion valve assembly further includes a valve seat 400 and a valve needle assembly 500. The valve seat 400 is disposed on the guide sleeve 300 and has a valve port 410 through which the valve cavity 120 is connected. The valve needle assembly 500 is movably disposed on the guide sleeve 300 and includes a valve stem 510 and a valve head 520 connected to the valve stem 510. The valve head 520 is movably inserted into the valve port 410, and the valve stem 510 is reciprocating along the axial direction of the valve port 410 to drive the valve head 520 to open or close the valve port 410.

[0059] Specifically, the guide sleeve 300 has a medium flow chamber 350 and an installation port 360. The medium flow chamber 350 communicates with the valve chamber 120, and the valve chamber 120 communicates with the first interface 130. A valve seat 400 is installed at the installation port 360 and is sealed to the guide sleeve 300. The valve seat 400 has a valve port 410, which communicates with the second interface 140. The medium flow chamber 350 can communicate with the valve port 410. When the electronic expansion valve 10 operates, the fluid medium first enters the valve chamber 120 from the first interface 130, then enters the medium flow chamber 350 through the valve chamber 120, then flows out from the valve port 410 in the medium flow chamber 350, and finally flows out through the second interface 140. The first interface 130 and the second interface 140 are used to connect pipes. It should be noted that the fluid medium can flow in from either the first interface 130 or the second interface 140 and flow out from the other port; there is no specific limitation on this.

[0060] Please continue reading. Figure 1 and Figure 2The valve needle assembly 500 includes a valve stem 510 and a valve head 520 connected to the valve stem 510. A valve port 410 communicates with a second interface 140. The valve port 410 is used for the insertion of the valve head 520 of the valve needle assembly 500, thereby blocking the flow of fluid medium within the electronic expansion valve 10 through the valve port 410. When the valve head 520 of the valve needle assembly 500 closes the valve port 410, that is, when the medium flow chamber 350 and the valve port 410 are disconnected, the electronic expansion valve 10 is closed, and the fluid medium cannot flow from the first interface 130 to the second interface 140. When the valve head 520 of the valve needle assembly 500 releases the seal on the valve port 410, that is, when the medium flow chamber 350 and the valve port 410 are interconnected, the electronic expansion valve 10 is opened, and the fluid medium can flow from the first interface 130 to the second interface 140. The inner wall of the valve port 410 forms a flow regulating surface, which extends downward at an angle. The valve head 520 is cylindrical in shape. When the valve head 520 abuts against the flow regulating surface, the valve head 520 completely closes the valve port 410. When the valve head 520 moves upward, a gap exists between the valve head 520 and the flow regulating surface. This gap increases as the valve head 520 moves upward, and the fluid medium flows through the gap into the valve port 410 and out. The valve head 520 controls the flow rate of the fluid medium in the electronic expansion valve 10 by controlling the size of the gap between the valve head 520 and the flow regulating surface.

[0061] Please continue reading. Figure 1 and Figure 2 In one embodiment, the electronic expansion valve assembly further includes a nut assembly 600 and a rotor assembly 700. The nut assembly 600 is threadedly connected to the valve needle assembly 500. The rotor assembly 700 is sleeved on the valve needle assembly 500 and can drive the valve needle assembly 500 to rotate relative to the nut assembly 600, so that the valve stem 510 reciprocates along the axial direction of the valve port 410, thereby driving the valve head 520 to open or close the valve port 410.

[0062] Specifically, the nut assembly 600 is fixedly connected to the connecting seat 200. The nut assembly 600 has a nut, which is threadedly connected to the valve stem 510 of the valve needle assembly 500. The rotor assembly 700 is connected to the valve stem 510. Since the nut and the valve stem 510 form a threaded fit relationship, the rotation of the rotor assembly 700 can drive the valve stem 510 to rotate, thereby causing the valve stem 510 to perform telescopic movement along the axial direction of the valve port 410. This realizes the movement process of the valve stem 510 driving the valve head 520 to move, thereby opening or closing the valve port 410.

[0063] The working principle of the electronic expansion valve 10 is as follows:

[0064] When the stator assembly is energized, it generates a magnetic field. The rotor, made of magnetic material, rotates under the drive of the magnetic field. The rotor is fixedly connected to the valve stem 510. The rotation of the rotor drives the valve stem 510 to rotate. A threaded engagement relationship is formed between the valve stem 510 and the nut. The nut assembly 600 is fixedly mounted on the connecting seat 200. Therefore, the rotation of the valve stem 510 relative to the nut will drive the valve stem 510 to extend and retract relative to the nut, thereby realizing the working process of the stator assembly driving the rotor assembly 700 to move, and the rotor assembly 700 driving the valve needle assembly 500 to move.

[0065] Driven by the valve stem 510, the valve head 520 moves toward the valve port 410. When the valve head 520 closes the valve port 410, that is, when the medium flow chamber 350 and the valve port 410 are disconnected, the electronic expansion valve 10 is closed, and the fluid medium cannot flow from the first port 130 to the second port 140. When the valve head 520 releases the seal on the valve port 410, that is, when the medium flow chamber 350 and the valve port 410 are connected, the electronic expansion valve 10 opens, and the fluid medium can flow from the first port 130 to the second port 140. Because the opening diameter of the valve port 410 in the electronic expansion valve 10 is relatively small, the flow rate of the fluid medium is reduced, thereby realizing the throttling and pressure reduction process of the fluid medium by the electronic expansion valve 10.

[0066] Please see Figure 1 In one embodiment, the electronic expansion valve assembly further includes a valve housing 800, which is a cylindrical structure open at one end. The valve housing 800 is connected to the connecting seat 200 and covers the valve needle assembly 500, the nut assembly 600, and the rotor assembly 700. Specifically, the valve housing 800 is generally cylindrical in shape, and the valve housing 800 and the connecting seat 200 can be fixed by welding. An internal cavity is formed within the valve housing 800, which, in addition to the nut assembly 600 and the valve needle assembly 500, also houses the rotor assembly 700. The rotor assembly 700 is connected to the valve stem 510, which rotates under the drive of the rotor assembly 700, thereby moving the valve head 520 to open or close the valve port 410. The valve housing 800 protects the internal components of the electronic expansion valve assembly. Fluid media can flow into the cavity when the electronic expansion valve 10 is in operation.

[0067] The present invention also proposes an electronic expansion valve 10, which includes a valve seat 100 and the aforementioned electronic expansion valve assembly, wherein the electronic expansion valve assembly is mounted on the valve seat 100. The specific structure of the electronic expansion valve assembly is as described in the above embodiments. Since the present electronic expansion valve 10 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0068] The present invention also proposes a refrigeration device, which includes the aforementioned electronic expansion valve 10, and the electronic expansion valve 10 includes the aforementioned electronic expansion valve assembly. The specific structure of the electronic expansion valve assembly is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The refrigeration device may be an air conditioner, a freezer, a refrigerator, or a heat pump water heater, etc.

[0069] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An electronic expansion valve assembly for mounting on a valve seat of an electronic expansion valve, wherein one end of the valve seat has a port, and a valve cavity communicating with the port is formed within the valve seat, characterized in that, The electronic expansion valve assembly includes: Connector, the connector being disposed at the port; and A guide sleeve is disposed in the valve cavity and is riveted to the connecting seat; The connecting seat has a first through hole and a second through hole communicating with the first through hole, and the lower end face of the first through hole forms a riveting surface; the guide sleeve includes a guide portion, which extends into the second through hole and abuts against the riveting surface through its own deformation; The guide sleeve further includes a mounting portion, the guide portion being connected to the mounting portion, and the outer diameter of the mounting portion being not less than the outer diameter of the guide portion; The guide sleeve also includes a body portion, which is connected to the mounting portion. The upper end surface of the body portion forms a first limiting portion, which abuts against the lower end surface of the connecting seat.

2. The electronic expansion valve assembly as claimed in claim 1, characterized in that, The difference between the outer diameter of the guide portion and the outer diameter of the mounting portion is D, where 2 mm ≥ D ≥ 0.005 mm.

3. The electronic expansion valve assembly as described in claim 2, characterized in that, The difference between the outer diameter of the guide portion and the outer diameter of the mounting portion is D, where 0.5 mm ≥ D ≥ 0.005 mm.

4. The electronic expansion valve assembly as claimed in claim 3, characterized in that, The width of the riveting surface is M1. The guide portion includes a first guide portion located in the first through hole and a second guide portion located in the second through hole. The first guide portion and the second guide portion are connected. The height of the first guide portion is H1, and M1≥H1≥0.2M1.

5. The electronic expansion valve assembly as claimed in claim 1, characterized in that, The connecting seat is made of stainless steel, and the guide sleeve is made of aluminum alloy. The connecting seat and the guide sleeve are riveted together.

6. An electronic expansion valve, characterized in that, The electronic expansion valve includes: Valve seat; and The electronic expansion valve assembly as described in any one of claims 1 to 5, wherein the electronic expansion valve assembly is mounted on the valve seat.

7. A refrigeration device, characterized in that, The refrigeration equipment includes the electronic expansion valve as described in claim 6.

8. The refrigeration equipment as described in claim 7, characterized in that, The refrigeration equipment is an air conditioner, a freezer, a refrigerator, or a heat pump water heater.

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