Electronic expansion valve and refrigeration equipment

Abstract

The electronic expansion valve comprises a valve body, a pipe B, a pipe A and a noise reduction structure, the valve body is provided with a refrigerant port, a refrigerant cavity and a valve port, the refrigerant cavity is communicated with the refrigerant port and the valve port, the pipe A comprises a first pipe section and a second pipe section which are connected, and the first pipe section and the second pipe section are communicated with each other. The first pipe section is installed on the valve body and communicates with the valve port, the pipe B is installed at the refrigerant port, and the noise reduction structure is connected to the peripheral face of the first pipe section and used for reducing outward transmission of noise in the pipe A; according to the technical scheme, outward transmission of gasification noise in the electronic expansion valve is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to an electronic expansion valve and refrigeration equipment. Background Art

[0002] The noise problem of electronic expansion valves has always been a highly concerned issue in air-conditioning systems. The noise generation mechanism of the expansion valve is complex and has many noise components. This application aims to adopt a method to reduce the gasification noise inside the electronic expansion valve. Summary of the invention

[0003] The main purpose of the present invention is to provide an electronic expansion valve, aiming to reduce the outward propagation of gasification noise inside the electronic expansion valve.

[0004] To achieve the above object, the electronic expansion valve proposed in the present invention comprises:

[0005] A valve body, wherein the valve body is provided with a refrigerant port, a refrigerant cavity and a valve port, and the refrigerant cavity is in communication with the refrigerant port and the valve port;

[0006] A pipe, the A pipe comprising a first pipe section and a second pipe section connected to each other, the first pipe section being installed on the valve body and communicating with the valve port;

[0007] A B tube, the B tube is installed at the refrigerant port; and

[0008] A noise reduction structure is connected to the outer peripheral surface of the first pipe section and is used to reduce the noise in the A pipe from propagating outward.

[0009] Optionally, the noise reduction structure is a noise reduction layer, the noise reduction layer and the first pipe segment are integrally formed, the sum of the thicknesses of the first pipe segment and the noise reduction layer is δ1, the thickness of the second pipe segment is δ2, and δ1>δ2.

[0010] Optionally, the noise reduction structure is a noise reduction layer, the noise reduction layer is integrally formed with the first pipe segment, the sum of the thickness of the first pipe segment and the noise reduction layer is δ1, the thickness of the B tube is δ3, and δ1>δ3.

[0011] Optionally, the noise reduction structure is a refrigerant sleeve, which is sealed to the valve body and the first pipe section and sleeved outside the first pipe section, and the refrigerant sleeve and the first pipe section are spaced apart to form a noise reduction cavity.

[0012] Optionally, the total length of the A tube is L2, the total length of the refrigerant sleeve is L3, and L2>L3.

[0013] Optionally, the noise reduction structure is a silencer pipe, and the silencer pipe is sleeved on the outer circumferential surface of the first pipe section.

[0014] Optionally, the silencer pipe is made of any one of sponge, rubber, plastic and ceramic.

[0015] Optionally, the total length of the A tube is L, the length of the first tube segment is L1, and L1≤L.

[0016] Optionally, L1 ≥ 30 mm.

[0017] Optionally, the B tube includes a third tube segment and a fourth tube segment connected to each other, and the third tube segment is welded and fixed at the refrigerant port.

[0018] Optionally, a diameter of the fourth pipe segment is greater than a diameter of the third pipe segment.

[0019] Optionally, the valve body comprises:

[0020] a valve seat, wherein the refrigerant port and the valve port are provided on the valve seat;

[0021] A nut, wherein the nut is fixedly mounted on the valve seat, the nut and the valve seat enclose a refrigerant cavity, the refrigerant cavity is connected to the refrigerant port and the valve port, and the valve seat is provided with a threaded hole along the axial direction of the valve seat;

[0022] A valve needle assembly, the valve needle assembly comprising a transmission section, a threaded section and a blocking section arranged in sequence, the threaded section being threadedly connected to the threaded hole; and

[0023] A magnetic rotor is installed on the valve seat and sleeved on the transmission section. The magnetic rotor drives the valve needle assembly to rotate so that the blocking section blocks or separates from the valve port.

[0024] Optionally, the blocking section is arranged in a conical shape on a side facing the valve port.

[0025] The present invention also provides a refrigeration device, comprising the electronic expansion valve as described above.

[0026] The electronic expansion valve of the technical solution of the present invention includes a valve body, a B tube, an A tube and a noise reduction structure. The valve body is provided with a refrigerant port and a valve port. The B tube is installed at the refrigerant port. The A tube includes a first pipe section and a second pipe section connected to each other. The first pipe section is installed on the valve body and is connected to the valve port. The noise reduction structure is connected to the outer peripheral surface of the first pipe section. Since the first pipe section is arranged close to the valve port, the gasification noise it generates is greater. Therefore, by setting the noise reduction structure, the noise generated at the first pipe section is reduced from propagating outward, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a cross-sectional view of Embodiment 1 of the electronic expansion valve of the present invention;

[0029] Figure 2 It is a cross-sectional view of Embodiment 2 of the electronic expansion valve of the present invention;

[0030] Figure 3 It is a cross-sectional view of Embodiment 3 of the electronic expansion valve of the present invention;

[0031] Figure 4 It is a cross-sectional view of the fourth embodiment of the electronic expansion valve of the present invention.

[0032] Description of Figure Numbers:

[0033] Label name Label name 11 Valve Seat 20 B tube 111 Refrigerant port 21 The third pipe section 112 Valve port 22 The fourth section 113 Refrigerant chamber 30 A-tube 12 Coil 31 First pipe section 13 Valve needle assembly 32 Second pipe section 14 Nuts 41 Refrigerant casing 15 Abutment plate 411 Noise reduction chamber 16 Guide rail spring 42 Silencer 17 Connector

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Reference Figures 1 to 4 The present invention provides an electronic expansion valve, comprising:

[0040] A valve body, wherein the valve body is provided with a refrigerant port 111, a refrigerant cavity 113 and a valve port 112, and the refrigerant cavity 113 is in communication with the refrigerant port 111 and the valve port 112;

[0041] A pipe 30, the A pipe 30 includes a first pipe section 31 and a second pipe section 32 connected to each other, the first pipe section 31 is installed on the valve body and communicates with the valve port 112;

[0042] A B tube 20, the B tube 20 is installed at the refrigerant port 111; and

[0043] A noise reduction structure is connected to the outer peripheral surface of the first pipe section 31 and is used to reduce the noise in the A pipe 30 from propagating outward.

[0044] The electronic expansion valve of the technical solution of the present invention includes a valve body, a B tube 20, an A tube 30 and a noise reduction structure. A refrigerant port 111 and a valve port 112 are provided on the valve body. The B tube 20 is installed at the refrigerant port 111. The A tube 30 includes a first pipe section 31 and a second pipe section 32 connected to each other. The first pipe section 31 is installed on the valve body and is communicated with the valve port 112. The noise reduction structure is connected to the outer peripheral surface of the first pipe section 31. Since the first pipe section 31 is arranged close to the valve port 112, the gasification noise it generates is greater. Therefore, by setting the noise reduction structure, the noise generated at the first pipe section 31 is reduced from propagating outward, thereby improving the user experience.

[0045] It should be noted that, during cooling, the A tube 30 serves as the medium outlet pipe, the valve port 112 serves as the medium outlet, the B tube 20 serves as the medium inlet pipe, and the refrigerant port 111 serves as the medium inlet; during heating, the A tube 30 serves as the medium inlet pipe, the valve port 112 serves as the medium inlet, the B tube 20 serves as the medium outlet pipe, and the refrigerant port 111 serves as the medium outlet.

[0046] Reference Figure 1 In the first embodiment, the noise reduction structure is a noise reduction layer, which is integrally formed with the first pipe segment 31. The sum of the thickness of the first pipe segment 31 and the noise reduction layer is δ1, and the thickness of the second pipe segment 32 is δ2, δ1>δ2. The material of the noise reduction layer is the same as that of the first pipe segment 31, which is equivalent to thickening the wall thickness of the first pipe segment 31, thereby reducing the outward propagation of noise in the first pipe segment 31.

[0047] Reference Figure 2 In the second embodiment, the noise reduction structure is a noise reduction layer, and the noise reduction layer is integrally formed with the first pipe segment 31. The thickness of the B tube 20 is δ3, and δ1>δ3, which means that the thickness of the first pipe segment 31 is thicker than that of the second pipe segment 32 and the B tube 20, further indicating that the thickness of the first pipe segment 31 and the noise reduction layer is thicker, thereby reducing the outward propagation of noise in the first pipe segment 31.

[0048] Reference Figure 3 In the third embodiment, the noise reduction structure is a refrigerant sleeve 41, which is sealed and connected to the valve body and the first pipe section 31, and is sleeved outside the first pipe section 31. The refrigerant sleeve 41 and the first pipe section 31 are spaced apart to form a noise reduction chamber 411. It can be understood that the noise reduction chamber 411 is in a vacuum state, and the vacuum sound insulation effect is good, thereby reducing the outward propagation of the noise generated in the first pipe section 31, thereby improving the user experience. Of course, the noise reduction chamber 411 can also be filled with fillers such as air, gravel, foam, etc., which can also reduce the outward propagation of the noise in the first pipe section 31.

[0049] Furthermore, the total length of the A-tube 30 is L2, and the total length of the refrigerant sleeve 41 is L3, L2>L3. It can be understood that the noise generated by the refrigerant gasification is relatively large in the A-tube 30, but is relatively small when transmitted to other pipes connected to the A-tube 30, so it is only necessary to reduce the noise in the A-tube 30, thereby reducing the length of the noise reduction structure and reducing the cost.

[0050] Reference Figure 4 In the fourth embodiment, the noise reduction structure is a silencer pipe 42, and the silencer pipe 42 is sleeved on the outer peripheral surface of the first pipe section 31. By providing the silencer pipe 42, the noise generated by the gasification of the refrigerant in the first pipe section 31 is reduced from propagating outward, thereby improving the user experience.

[0051] The muffler pipe 42 is made of any one of sponge, rubber, plastic and ceramic. It is understandable that materials such as sponge, rubber, plastic and ceramic are relatively cheap and have good noise reduction effects, thereby reducing the manufacturing cost of the electronic expansion valve and improving the noise reduction effect.

[0052] In this embodiment, the total length of the A tube 30 is L, and the length of the first tube section 31 is L1, L1≤L, thereby minimizing the gasification noise and reducing the material used in the A tube 30, thereby reducing the production cost, and also reducing the noise generated by the gasification process and turbulence process in the A tube 30 under refrigeration conditions.

[0053] Optionally, L1≥30mm. Through simulation experimental data, it is found that the vaporization turbulence zone is basically within 30mm; if L1≤30mm, part of the turbulence zone will enter the second pipe section 32. Since the second pipe section 32 is thinner than the first pipe section 31, the noise reduction effect of the second refrigerant section will be thinner than that of the first pipe section 31; therefore, it is necessary to ensure that the length of the first pipe section 31 is greater than 30mm, so that the noise generated by the vaporization process and turbulence process in the A tube 30 under refrigeration conditions is located in the thicker first pipe section 31, thereby reducing the vaporization noise inside the electronic expansion valve.

[0054] In this embodiment, the B tube 20 includes a third tube section 21 and a fourth tube section 22 connected to each other, and the third tube section 21 is welded and fixed to the refrigerant port 111. The diameter of the fourth tube section 22 is larger than the diameter of the third tube section 21. The third tube section 21 is used to adapt to the size setting of the refrigerant port 111. Further, the diameter of the fourth tube section 22 is smaller than the diameter of the third tube section 21, thereby increasing the pressure of the refrigerant entering the refrigerant cavity, while also reducing the generation of eddy currents, thereby reducing the generation of noise.

[0055] Furthermore, the inclined transition between the third pipe segment 21 and the fourth pipe segment 22 reduces the flow resistance of the refrigerant flowing from the fourth pipe segment 22 to the third pipe segment 21 compared to the right-angle transition between the third pipe segment 21 and the fourth pipe segment 22; of course, in other embodiments, the third pipe segment 21 and the fourth pipe segment 22 may be transitioned by an arc surface.

[0056] In this embodiment, the valve body includes a valve seat 11, a nut 14, a valve needle assembly 13 and a magnetic rotor; the valve seat 11 is provided with the refrigerant port 111 and the valve port 112; the nut 14 is fixedly installed on the valve seat 11, and the nut 14 and the valve seat 11 enclose a refrigerant cavity, the refrigerant cavity is communicated with the refrigerant port 111 and the valve port 112, and the valve seat 11 is provided with a threaded hole along the axial direction of the valve seat 11; the valve needle assembly 13 includes a transmission section, a threaded section and a sealing section arranged in sequence, and the threaded section is threadedly connected to the threaded hole; the magnetic rotor is installed on the valve seat 11 and sleeved on the transmission section, and the magnetic rotor drives the valve needle assembly 13 to rotate so that the sealing section blocks or disengages from the valve port 112.

[0057] In one embodiment, the valve seat 11 can be used to install and carry components such as the nut 14, the valve needle assembly 13, and the magnetic rotor, so that the various components of the electronic expansion valve can be assembled into a whole. Among them, the valve seat 11 can be a cylindrical structure with openings at both ends, one of which can be formed as a valve port 112, and the other opening is covered by the nut 14. The shape of the valve seat 11 can be a circular structure, so that its shape is more regular and easy to process and form. Of course, the present application is not limited to this. In other embodiments, the valve seat 11 can also be a square structure or other shape structures. The nut 14 can be used to enclose the refrigerant cavity with the valve seat 11, and the threaded hole on the nut 14 can be coaxially arranged with the valve port 112 on the valve seat 11, so that the subsequent valve needle assembly 13 can be accurately inserted into the valve port 112. Among them, the nut 14 can be completely arranged on the outside of the valve seat 11, and of course it can also be partially embedded in the opening formed at one end of the valve seat 11 away from the valve port 112. In this way, the contact area between the nut 14 and the valve seat 11 can be increased, thereby facilitating improvement of the stability and sealing of the connection between the two.

[0058] Furthermore, the nut 14 may be sleeved with a connecting piece 17, which may cover the connection between the nut 14 and the valve seat 11, so as to further improve the sealing performance of the connection between the nut 14 and the valve seat 11. The connecting piece 17 and the nut 14 may be embedded in the outer peripheral surface of the nut 14 to achieve the clamping fixation of the two, and the nut 14 may be fixed by welding to better improve the stability of the connection between the two. In addition, the shape of the nut 14 may also be a circular structure, so that its shape is more regular and easy to process and shape, and it can also make its volume relatively small and help to reduce the space occupied. The threaded hole on the nut 14 may be partially a threaded hole section, in which case the upper end, middle part or lower end of the threaded hole may be formed as a threaded hole section. Of course, the upper end, middle part or lower end of the threaded hole may also be formed as a threaded hole section. One end of the valve needle assembly 13 may be inserted into the threaded hole and threadedly connected to the threaded hole. The valve needle assembly 13 extending from the threaded hole into the refrigerant cavity can be inserted into the valve port 112 to completely or partially close the valve port 112. When the valve port 112 is completely closed, the valve needle assembly 13 fits tightly with the valve port 112 so that the refrigerant cannot pass through. When the valve port 112 is partially closed, there is a gap between the valve needle assembly 13 and the valve port 112 so that a small amount of refrigerant can pass through. At the same time, it can also be detached from the valve port 112 to completely open the valve port 112. The magnetic rotor can be used to provide power so that the valve needle assembly 13 can rotate relative to the nut 14.

[0059] Furthermore, the blocking section is tapered toward the valve port 112. It is understandable that the valve port 112 has a relatively small opening, and by providing the blocking section in a tapered shape, it is convenient to adjust the opening and closing size of the valve port 112, and the tapered blocking section can gradually extend into the valve port 112, thereby achieving the effect of adjusting the size of the valve port 112.

[0060] Furthermore, the blocking section is made of a flexible material, so that the blocking section can be sealed at the valve port 112 only when it is completely in contact with the valve port 112, thereby achieving the effect of stopping liquid; of course, in other embodiments, a layer of flexible material can be provided on the outer wall of the blocking section, or a layer of flexible material can be provided on the hole wall of the valve port 112 to achieve the sealing between the blocking section and the valve port 112, wherein the flexible material can be silicone, rubber, etc., and materials such as silicone and rubber have good wear resistance and are cheap, thereby reducing the production cost of the electronic expansion valve.

[0061] Specifically, the outer side of the magnetic rotor may be provided with a coil 12 component, and the magnetic rotor may sense the electromagnetic force of the coil 12 component and perform rotational motion. Since the valve needle assembly 13 is connected to the magnetic rotor, it rotates synchronously therewith, and the nut 14 section on the valve needle assembly 13 and the mounting hole on the nut 14 are threadedly matched to realize the lifting and lowering motion along the approach or distance from the valve port 112, thereby realizing the insertion and disengagement of the valve port 112. Among them, the magnetic rotor may be a cylindrical structure with one end open, so that its shape is adapted to the rotation trajectory and the possibility of interference during the movement can be reduced.

[0062] When the electronic expansion valve of the technical solution of the present invention is in use, the magnetic rotor can sense the electromagnetic force of the coil 12 component to rotate, and drive the valve needle assembly 13 to rotate relative to the nut 14. Since the valve needle assembly 13 and the nut 14 are threaded, the valve needle assembly 13 can slide axially during the rotation process, that is, it can rise and fall in the installation hole along the valve port 112 on the valve seat 11. The valve needle assembly 13 can be inserted into the valve port 112 or detached from the valve port 112, thereby realizing the control of closing and opening of the electronic expansion valve.

[0063] In one embodiment, the valve needle assembly 13 includes an integrally arranged valve needle, and the transmission section, the threaded section and the blocking section are all arranged on the valve needle, so that the structure of the valve needle assembly 13 is simple, the number of parts is reduced, and it is beneficial to reduce the manufacturing cost of the electronic expansion valve.

[0064] It can be understood that if the valve needle assembly 13 is an integrated valve needle structure, the diameters of the transmission section, the threaded section and the sealing section are R1, R2 and R3 respectively, and R1>R2>R3. In this way, when installing the valve needle, the sealing section of the valve needle can be directly inserted downward and passed through the threaded hole and the refrigerant cavity in turn, thereby facilitating the installation and disassembly of the electronic expansion valve.

[0065] In another embodiment, the valve needle assembly 13 includes a valve needle and a screw rod. The valve needle is fixed on the screw rod. The magnetic rotor drives the screw rod to rotate, and the screw rod drives the valve needle to rotate. The transmission section and the threaded section are arranged on the screw rod, and the sealing section is arranged on the valve needle. By arranging the valve needle and the screw rod, the installation and subsequent maintenance of the valve needle assembly 13 are facilitated. If the valve needle assembly 13 needs to be replaced, only the corresponding parts need to be replaced, thereby reducing the subsequent maintenance cost.

[0066] The operating principle of the electronic expansion valve is as follows: the electronic expansion valve generates a magnetic field through the current of the coil 12 and acts on the valve needle assembly 13, driving the valve needle assembly 13 to rotate. When the positive and negative power supply voltages and signals of the coil 12 are changed, the electronic expansion valve also opens, closes, or changes the size of the opening and closing gaps, thereby achieving the control system's refrigerant flow rate and the size of the cooling and heat. The smaller the valve core is opened, the smaller the refrigerant flow rate is.

[0067] The role of the electronic expansion valve in the refrigerant system is throttling, that is, adjusting the flow of high-pressure liquid refrigerant entering the evaporator from the liquid pipeline and maintaining the pressure difference between the high-pressure side and the low-pressure side of the system to ensure that the refrigerant can evaporate at the desired low pressure in the evaporator, and at the same time, condense in the condenser under high pressure.

[0068] It only takes a few seconds for the electronic expansion valve to go from fully closed to fully open, with fast response and action speed, no static superheat phenomenon, and the opening and closing characteristics and speed can be set manually, which is especially suitable for the use of heat pump units with drastic operating conditions. This facilitates the rapid switching of the refrigerant flow, improves the working efficiency of the refrigeration equipment, and has stable performance, thereby extending the service life of the refrigeration equipment.

[0069] Furthermore, a guide rail is provided on the outer wall of the nut 14, and the guide rail is spirally extended in the direction where the valve needle is close to the valve port 112. The electronic expansion valve also includes a sliding member, part of which is embedded in the guide rail and can slide along the extension direction of the guide rail; the magnetic rotor also includes an abutment plate 15, which is connected to the limit plate, and when the magnetic rotor drives the valve needle to rotate relative to the nut 14, the abutment plate 15 abuts and drives the sliding member.

[0070] It can be understood that the sliding member can be abutted and driven by the abutment plate 15 during the rotation of the magnetic rotor, and since the travel of the guide rail has an upper limit and a lower limit, the sliding member also has an upper limit position and a lower limit position during the lifting process along the guide rail. At this time, the lifting travel of the valve needle driven by the magnetic rotor is correspondingly controlled.

[0071] In one embodiment, the electronic expansion valve also includes a guide rail spring 16, which is sleeved on the nut 14 and enclosed with the nut 14 to form a guide rail; the sliding member includes a ring body and an extension rod, the ring body is spirally arranged and located in the guide rail, the extension rod is connected to the ring body, and can be driven by the abutment plate 15.

[0072] It can be understood that the guide rail is formed by the cooperation of the guide rail spring 16 and the nut 14, so that there is no need to directly open the guide rail on the outer peripheral surface of the nut 14, and the guide rail spring 16 only needs to be sleeved on the outer peripheral wall of the nut 14, or the guide rail spring 16 is fixed to the outer peripheral wall of the nut 14, thereby greatly simplifying the processing technology of the guide rail. Among them, the guide rail spring 16 and the nut 14 can be fixed by clamping, that is, the nut 14 can be provided with a clamping groove for inserting one end of the guide rail spring 16, and the guide rail spring 16 can be directly welded and fixed to the nut 14. In addition, it should be noted that in other embodiments, a spiral groove body can be directly opened on the nut 14 to form a guide rail.

[0073] The present invention also proposes a refrigeration device, which includes an electronic expansion valve. The specific structure of the electronic expansion valve refers to the above-mentioned embodiment. Since the refrigeration device of the present application adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0074] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An electronic expansion valve, characterized in that: include: A valve body, wherein the valve body is provided with a refrigerant port, a refrigerant cavity and a valve port, and the refrigerant cavity is in communication with the refrigerant port and the valve port; A pipe, the A pipe comprising a first pipe section and a second pipe section connected to each other, the first pipe section being installed on the valve body and communicating with the valve port; A B tube, the B tube is installed at the refrigerant port; as well as A noise reduction structure, wherein the noise reduction structure is connected to the outer peripheral surface of the first pipe section and is used to reduce the noise in the A pipe from propagating outward.

2. The electronic expansion valve according to claim 1, characterized in that: The noise reduction structure is a noise reduction layer, which is integrally formed with the first pipe segment. The sum of the thicknesses of the first pipe segment and the noise reduction layer is δ1, and the thickness of the second pipe segment is δ2, where δ1>δ2.

3. The electronic expansion valve according to claim 1, characterized in that: The noise reduction structure is a noise reduction layer, which is integrally formed with the first pipe segment. The sum of the thicknesses of the first pipe segment and the noise reduction layer is δ1, the thickness of the B tube is δ3, and δ1>δ3.

4. The electronic expansion valve according to claim 1, characterized in that: The noise reduction structure is a refrigerant sleeve (41), which is sealedly connected to the valve body and the first pipe section and sleeved outside the first pipe section. The refrigerant sleeve and the first pipe section are spaced apart to form a noise reduction cavity.

5. The electronic expansion valve according to claim 4, characterized in that: The total length of the A tube is L2, the total length of the refrigerant sleeve is L3, and L2>L3.

6. The electronic expansion valve according to claim 1, characterized in that: The noise reduction structure is a silencer pipe, and the silencer pipe is sleeved on the outer peripheral surface of the first pipe section.

7. The electronic expansion valve according to claim 6, characterized in that: The material of the silencer pipe is any one of sponge, rubber, plastic and ceramic.

8. The electronic expansion valve according to claim 1, characterized in that: The total length of the A tube is L, and the length of the first tube section is L1, where L1≤L.

9. The electronic expansion valve according to claim 8, characterized in that: L1≥30mm.

10. The electronic expansion valve according to claim 1, characterized in that: The B tube includes a third tube segment and a fourth tube segment connected to each other, and the third tube segment is welded and fixed at the refrigerant port.

11. The electronic expansion valve according to claim 10, characterized in that: The diameter of the fourth pipe segment is greater than the diameter of the third pipe segment.

12. The electronic expansion valve according to claim 1, characterized in that: The valve body comprises: a valve seat, wherein the refrigerant port and the valve port are provided on the valve seat; A nut, wherein the nut is fixedly mounted on the valve seat, the nut and the valve seat enclose a refrigerant cavity, the refrigerant cavity is connected to the refrigerant port and the valve port, and the valve seat is provided with a threaded hole along the axial direction of the valve seat; A valve needle assembly, the valve needle assembly comprising a transmission section, a threaded section and a blocking section arranged in sequence, the threaded section being threadedly connected to the threaded hole; and A magnetic rotor is installed on the valve seat and sleeved on the transmission section. The magnetic rotor drives the valve needle assembly to rotate so that the blocking section blocks or separates from the valve port.

13. The electronic expansion valve according to claim 12, characterized in that: The blocking section is arranged in a conical shape on one side facing the valve opening.

14. A refrigeration device, characterized in that: Comprising the electronic expansion valve as claimed in any one of claims 1 to 13.

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