Electronic expansion valve opener

Abstract

The invention discloses an electronic expansion valve opener which is used for opening an electronic expansion valve, the electronic expansion valve comprises a rotor, a driving assembly, an execution assembly and a shell, the driving assembly is arranged in an upper cavity of the shell, and the execution assembly is arranged in a lower cavity of the shell; the driving assembly comprises a motor, a control unit and a battery, the execution assembly comprises a valve opening rotor rotatably installed in the lower cavity, and the motor is in transmission connection with the valve opening rotor so as to drive the valve opening rotor to rotate; the valve opening rotor is provided with an inner cavity, an electronic expansion valve can be arranged in the inner cavity in a sleeved mode, and the valve opening rotor is provided with a magnetic ring which can drive a rotor of the electronic expansion valve to rotate when rotating.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic expansion valves, and in particular to a valve opener for driving an electronic expansion valve to perform a valve opening action. Background Art

[0002] As a throttling element for refrigerant flow, the electronic expansion valve has become an important part of the intelligentization of refrigeration systems. It is also an important means and guarantee for the real realization of refrigeration system optimization and is being used in more and more fields.

[0003] For example, in an air-conditioning system, an electronic expansion valve is usually installed between the condenser and the expander to reduce pressure and throttle the flow, cooling the high-pressure liquid refrigerant coming out of the condenser and reducing the pressure before it enters the evaporator to evaporate and absorb heat.

[0004] During the air-conditioning assembly process, the electronic expansion valve is in a closed state, which causes the refrigerant to be unable to be filled into the air-conditioning system. As a result, the subsequent leakage detection cannot detect the leakage point of the air-conditioning, posing a safety risk. Therefore, existing OEMs will insert an expansion valve coil on the electronic expansion valve body and open the electronic expansion valve through the expansion valve driver.

[0005] like Figure 1 As shown, when the expansion valve coil is used to open the valve, the parameters of the electronic expansion valve driver 1 are set first, and then the expansion valve coil 2 is manually inserted into the electronic expansion valve 3, and then the button of the electronic expansion valve driver 1 is manually pressed to energize the expansion valve coil 2, thereby driving the electronic expansion valve 3 to open.

[0006] Since the electronic expansion valve driver 1 is relatively large in size and requires an external AC220 power supply, it is inconvenient to carry and has complex parameter settings.

[0007] Furthermore, since the electronic expansion valve driver 1 is provided with components such as a control circuit, a display panel and a metal casing, the cost of the entire mechanism is too high. Summary of the invention

[0008] The object of the present invention is to provide an electronic expansion valve opener to solve the above technical problems.

[0009] To achieve the above-mentioned purpose, the present invention provides an electronic expansion valve opener for opening an electronic expansion valve, wherein the electronic expansion valve comprises a rotor, a driving assembly, an actuator and a shell, wherein the driving assembly is arranged in the upper cavity of the shell, and the actuator is arranged in the lower cavity of the shell; the driving assembly comprises a motor, a control unit and a battery, and the actuator comprises a valve opening rotor rotatably mounted inside the lower cavity, and the motor is transmission-connected to the valve opening rotor to drive the valve opening rotor to rotate; the valve opening rotor has an inner cavity, and the inner cavity can be inserted into the electronic expansion valve, and the valve opening rotor is provided with a magnetic ring that can drive the rotor of the electronic expansion valve to rotate when rotating.

[0010] The electronic expansion valve opener provided by the present invention can be powered by a battery provided therein, and the valve opening rotor can be driven by a motor to rotate. When opening the valve, the electronic expansion valve can be directly inserted into the inner cavity of the valve opening rotor, and then the motor can be started by the control unit, so that the motor can drive the valve opening rotor to rotate. Since the valve opening rotor is provided with a magnetic ring, the magnetic ring will rotate with the valve opening rotor. During the rotation process, the magnetic ring can change the current magnetic field direction by changing the magnetic pole, thereby driving the magnetic rotor inside the electronic expansion valve to rotate, thereby achieving the effect of opening the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a traditional electronic expansion valve opening device;

[0012] Figure 2 A schematic diagram of the structure of an electronic expansion valve opener provided by an embodiment of the present invention;

[0013] Figure 3 for Figure 2 A top view of the electronic expansion valve opener shown;

[0014] Figure 4 for Figure 3 AA view of the electronic expansion valve opener shown;

[0015] Figure 5 for Figure 3 The BB view of the electronic expansion valve opener is shown;

[0016] Figure 6 Schematic diagram of magnetic pole distribution of magnetic ring;

[0017] Figure 7 It is a structural schematic diagram of inserting the electronic expansion valve into the electronic expansion valve opener;

[0018] Figure 8 for Figure 7 A top view of

[0019] Fig. 9for Figure 8 CC view;

[0020] Fig.10 for Figure 8 DD view.

[0021] Figure 1 middle:

[0022] 1. Electronic expansion valve driver 2. Expansion valve coil 3. Electronic expansion valve

[0023] Figures 2 to 10 middle:

[0024] 10. Drive assembly 11. Motor 111. Rotating shaft 12. Control unit 13. Battery 20. Actuator 21. Valve opening rotor 211. Horseshoe-shaped opening 22. First bearing 23. Second bearing 24. Positioning ring 25. Circlip 26. Magnetic ring 261. Arc-shaped magnet 27. Inner sleeve 30. Housing 31. Drive housing 32. Actuator housing 321. U-shaped bayonet 33. Cover 34. Charging interface 35. Button 40. Electronic expansion valve 41. Lateral pipeline DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0027] Please refer to Figures 2 to 5 , Figure 2 A schematic diagram of the structure of an electronic expansion valve opener provided by an embodiment of the present invention; Figure 3 for Figure 2 A top view of the electronic expansion valve opener shown; Figure 4 for Figure 3 AA view of the electronic expansion valve opener shown; Figure 5 for Figure 3 BB view of the electronic expansion valve opener shown.

[0028] In a specific embodiment, the electronic expansion valve opener provided by the present invention is mainly composed of three parts: a driving component 10, an actuator component 20 and a shell 30, wherein the shell 30 is a split assembly structure, the upper half is a driving shell 31, and the lower half is an actuator shell 32. After the driving shell 31 and the actuator shell 32 are connected up and down, the inner cavity of the driving shell 31 forms an upper cavity, and the inner cavity of the actuator shell 32 forms a lower cavity.

[0029] The driving housing 31 is in the shape of a U-shaped sleeve with an opening facing upward, and a cover 33 is provided on the top thereof. The executing housing 32 is in the shape of a U-shaped sleeve with an opening facing downward, and its top is connected to the bottom of the driving housing 31 by screws. The diameter of the driving housing 31 is slightly larger than the diameter of the executing housing 32, and the two form an annular step on the outer periphery.

[0030] The drive assembly 10 is mainly composed of a motor 11, a control unit 12 and a battery 13. The motor 11, the control unit 12 and the battery 13 are installed in the inner cavity of the drive housing 31. The motor 11 is fixed to the inner bottom of the drive housing 31 by screws. The control unit 12 and the battery 13 are respectively located on both sides of the motor 11. The cover 33 is provided with a charging interface 34 and a button 35. The charging interface 34 and the button 35 are respectively connected to the control unit 12 in the circuit. The battery 13 is a rechargeable battery. The battery 13 can be charged through the charging interface 34, and the start and stop of the motor 11 can be controlled by the button 35.

[0031] The valve opening rotor 21 is in the shape of an inverted U-shaped sleeve with a boss on the top, and a first step portion is provided at its upper end, and a first bearing 22 is provided between the first step portion and the inner wall of the actuator shell 32, and a second step portion is provided at its lower end, and a second bearing 23 is provided between the second step portion and the inner wall of the actuator shell 32. The valve opening rotor 21 is installed in the inner cavity of the actuator shell 32 through the first bearing 22 and the second bearing 23, and an appropriate gap is maintained between its outer periphery and the inner wall of the actuator shell 32, so that it can rotate in the inner cavity of the actuator shell 32.

[0032] The bottom of the driving housing 31 and the top of the execution housing 32 are provided with an axial hole for passing the motor shaft 111, and the boss on the top of the valve opening rotor 21 is provided with a horseshoe-shaped opening 211. The horseshoe-shaped opening 211 is D-shaped in cross section. After the motor shaft 111 passes through the axial hole, it is inserted into the horseshoe-shaped opening 211 of the valve opening rotor 21 and is connected to the valve opening rotor 21 to drive the valve opening rotor 21 to rotate.

[0033] The inner cavity of the valve opening rotor 21 is used to insert the electronic expansion valve 40 from the bottom of the execution shell 32. The bottom of the execution shell 32 is provided with an opening corresponding to the opening at the bottom of the valve opening rotor 21, and a positioning component for axially positioning the valve opening rotor 21 is provided at the opening to ensure that the valve opening rotor 21 does not fall.

[0034] In this embodiment, the positioning component is mainly composed of a positioning ring 24 and a retaining spring 25. The positioning ring 24 is located below the second bearing 23 and is used to support the outer ring of the second bearing 23. The retaining spring 25 is used to fix the positioning ring 24. The opening at the bottom of the execution housing 32 is provided with a circle of annular grooves on the inner wall for installing the retaining spring 25.

[0035] A magnetic ring 26 is provided inside the valve opening rotor 21, and the magnetic ring 26 is provided with an inner sleeve 27. The inner diameter of the inner sleeve 27 is slightly larger than the outer diameter of the rotor part shell of the electronic expansion valve 40. The upper end of the inner sleeve 27 can be connected to the valve opening rotor 21 by threaded connection or mutual plugging, and the magnetic ring 26 is located between the outer wall of the inner sleeve 27 and the inner wall of the valve opening rotor 21. In this embodiment, the magnetic ring 26 is installed on the outer wall of the inner sleeve 27, and then installed in the valve opening rotor 21 together with the inner sleeve 27. In this way, when the valve opening rotor 21 rotates, the rotor of the electronic expansion valve 40 can be driven to rotate through the magnetic ring 26.

[0036] The inner cavity of the valve opening rotor 21 is a stepped cavity, the upper half is a small diameter section, and the lower half is a large diameter section. A portion of the magnetic ring 26 in the axial direction is located in the small diameter section of the stepped cavity, and the other portion is located in the large diameter section of the stepped cavity.

[0037] Please refer to Figure 6 , Figure 6 Schematic diagram of the magnetic pole distribution of the magnetic ring.

[0038] The magnetic ring 26 is composed of a plurality of arc magnets 261 evenly distributed along the circumferential direction. Each arc magnet 261 has an S pole at one end and an N pole at the other end in the circumferential direction. The S pole of each arc magnet 261 corresponds to the N pole of the next arc magnet 261 and they are closely arranged.

[0039] The number of magnetic poles of the magnetic ring 26 is an even number and is less than the number of magnetic poles of the rotor of the electronic expansion valve 40. In the present embodiment, the magnetic ring 26 is composed of ten arc-shaped magnets 261 in the shape of a sleeve with a circular cross-section, with a total of twenty radial magnetic poles and a pole angle of 18°±2°. Its length is roughly equivalent to the length of the rotor part of the electronic expansion valve 40.

[0040] Of course, depending on the strength of the magnetic force, the length of the magnetic ring 26 may be greater than or appropriately smaller than the length of the rotor portion of the electronic expansion valve 40 .

[0041] Please continue to refer to Figures 7 to 10 , Figure 7 It is a structural schematic diagram of inserting the electronic expansion valve into the electronic expansion valve opener; Figure 8 for Figure 7 A top view of Fig. 9 for Figure 8 CC view; Fig.10 for Figure 8 DD view.

[0042] A limiting component is provided on one side of the lower edge of the execution housing 32 to limit the electronic expansion valve 40 circumferentially to prevent the internal mechanism from not rotating due to external rotation. In this embodiment, the limiting component is a U-shaped bayonet 321, which is integrally formed with the execution housing 32, and the bayonet width is substantially equivalent to the diameter of the lateral pipeline 41 of the electronic expansion valve 40.

[0043] When in use, first align the lateral pipeline 41 of the electronic expansion valve 40 with the U-shaped bayonet 321, and insert the cylindrical rotor part of the electronic expansion valve 40 into the inner cavity of the valve opening rotor 21, so that the lateral pipeline 41 of the electronic expansion valve 40 is stuck in the U-shaped bayonet 321, and then press the button 35 on the cover 33 by hand, and the control unit 12 outputs a voltage to energize the motor 11, and the main shaft of the drive motor 11 starts to rotate, driving the valve opening rotor 21 to rotate. Since the valve opening rotor 21 is provided with a magnetic ring 26, the magnetic ring 26 will rotate with the valve opening rotor 21. During the rotation process, the magnetic ring 26 can change the current magnetic field direction by changing the magnetic pole, thereby driving the magnetic rotor inside the electronic expansion valve 40 to rotate, thereby achieving the effect of opening the valve.

[0044] The above embodiments are only preferred solutions of the present invention, and are not limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementations. For example, the housing 30 is an integrated structure, or the magnetic ring 26 is arranged on the valve opening rotor along the inner wall of the valve opening rotor 21, etc. Since there are many possible implementation methods, they will not be described one by one here.

[0045] Compared with traditional valve opening equipment, the valve opening mechanism provided by the present invention is small and portable, with significantly reduced manufacturing costs and simple control logic. There is no need to set complex related parameters. The internal battery 13 can power the motor 11 and the control unit 12. It can be moved at will regardless of the spatial position. Moreover, the control unit 12 can control the rotation time of the motor 11 to prevent quality problems caused by differences in rotation time. It can be widely used to automatically open electronic expansion valves in refrigeration systems such as air conditioners and refrigerators.

[0046] The electronic expansion valve opener provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An electronic expansion valve opener, used for opening an electronic expansion valve (40), wherein the electronic expansion valve (40) comprises a rotor, characterized in that: The invention comprises a driving component (10), an actuator component (20) and a housing (30), wherein the driving component (10) is arranged in the upper cavity of the housing (30), and the actuator component (20) is arranged in the lower cavity of the housing (30); the driving component (10) comprises a motor (11), a control unit (12) and a battery (13); the actuator component (20) comprises a valve opening rotor (21) rotatably mounted inside the lower cavity; the motor (11) is transmission-connected to the valve opening rotor (21) to drive the valve opening rotor (21) to rotate; the valve opening rotor (21) has an inner cavity, wherein the inner cavity can be inserted into an electronic expansion valve (40); the valve opening rotor (21) is provided with a magnetic ring (26) which can drive the rotor of the electronic expansion valve (40) to rotate when rotating.

2. The electronic expansion valve opener according to claim 1, characterized in that: The magnetic ring (26) is provided with an inner sleeve (27), the inner sleeve (27) is connected to the valve opening rotor (21), and the magnetic ring (26) is located between the outer wall of the inner sleeve (27) and the inner wall of the valve opening rotor (21).

3. The electronic expansion valve opener according to claim 2, characterized in that: The inner cavity of the valve opening rotor (21) is a stepped cavity, a portion of the magnetic ring (26) in the axial direction is located in the small diameter section of the inner cavity, and another portion is located in the large diameter section of the inner cavity.

4. The electronic expansion valve opener according to claim 1, characterized in that: The magnetic ring (26) comprises arc-shaped magnets (261) uniformly distributed along the circumferential direction, one end of each arc-shaped magnet (261) in the circumferential direction is an S pole, and the other end is an N pole, and the S pole of each arc-shaped magnet (261) corresponds to the N pole of the next arc-shaped magnet (261).

5. The electronic expansion valve opener according to claim 1, characterized in that: The number of magnetic poles of the magnetic ring (26) is an even number and is smaller than the number of magnetic poles of the electronic expansion valve (40).

6. The electronic expansion valve opener according to claim 1, characterized in that: A first bearing (22) is provided between the upper end of the valve opening rotor (21) and the inner wall of the lower cavity, and a second bearing (23) is provided between the lower end of the valve opening rotor (21) and the inner wall of the lower cavity.

7. The electronic expansion valve opener according to claim 6, characterized in that: The bottom of the housing (30) is provided with an opening corresponding to the opening at the bottom of the valve-opening rotor (21), and a positioning component for axially positioning the valve-opening rotor (21) is provided at the opening.

8. The electronic expansion valve opener according to claim 7, characterized in that: The positioning component comprises a positioning ring (24) for supporting the outer ring of the second bearing (23), and a retaining spring (25) for fixing the positioning ring (24); a retaining groove for installing the retaining spring (25) is provided on the inner wall of the opening at the bottom of the housing (30).

9. The electronic expansion valve opener according to claim 1, characterized in that: A limiting component for circumferentially limiting the electronic expansion valve (40) is provided at the bottom of the housing (30).

10. The electronic expansion valve opener according to claim 9, characterized in that: The limiting component is a U-shaped bayonet (321) formed on the housing, and the U-shaped bayonet (321) is used to clamp the lateral pipeline (41) of the electronic expansion valve (40).

11. The electronic expansion valve opener according to claim 1, characterized in that: The housing (30) comprises a driving housing (31) and an executing housing (32) which are connected to each other from top to bottom. The inner cavity of the driving housing (31) forms the upper cavity, and the inner cavity of the executing housing (32) forms the lower cavity.

12. The electronic expansion valve opener according to claim 11, characterized in that: The driving housing (31) is in the shape of a U-shaped sleeve with an opening facing upward, a cover (33) is provided on the top, and a charging interface (34) and a button (35) connected to the control unit (12) are provided on the cover (33).

13. The electronic expansion valve opener according to claim 12, characterized in that: The execution housing (32) is in the shape of a U-shaped sleeve with an opening facing downward, and its top is connected to the bottom of the drive housing (31) via a connecting piece. The motor (11) is fixed to the inner bottom of the drive housing (31), and the bottom of the drive housing (31) and the top of the execution housing (32) are provided with an axial hole for passing the motor shaft (111).

14. The electronic expansion valve opener according to claim 13, characterized in that: The rotating shaft (111) of the motor (11) is plug-connected to the valve-opening rotor (21) and transmits the power in a circumferential direction.

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