Electromagnetic thermostatic expansion valve

Abstract

The utility model discloses an electromagnetic thermostatic expansion valve, which belongs to the technical field of thermostatic expansion valves, and comprises a thermostatic expansion valve and an electromagnetic valve, a valve rod of the electromagnetic valve is connected with a clamping piece, the clamping piece comprises a middle part, a locking part and a positioning part, the middle part is provided with a clamping groove used for being connected with the valve rod in a clamping manner, and the locking part is connected with the clamping groove. The locking part and the positioning part are both formed by bending the same end of the middle part upwards, the locking part is provided with a through hole matched with the end of the valve rod, and the positioning part is located in the through hole and used for abutting against the end of the valve rod. According to the electromagnetic thermostatic expansion valve provided by the utility model, the positioning part is additionally arranged on the clamping piece, and the end part of the valve rod is pressed by using the positioning part, so that the connection stability is improved, the possibility of loosening under the working condition of an automobile is reduced, and the normal operation of an electromagnetic valve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal expansion valves, and more specifically to an electromagnetic thermal expansion valve. Background Art

[0002] With the continuous development of automobile technology, electromagnetic thermal expansion valve, as a key component in automobile air conditioning system, plays an important role in regulating the flow of refrigerant. Its structure generally consists of two parts: electromagnetic valve and thermal expansion valve. Among them, the electromagnetic valve controls the movement of the internal valve core through electromagnetic excitation to adjust the flow of refrigerant, while the thermal expansion valve adjusts the expansion degree of refrigerant according to the pressure and temperature changes of the system to ensure the normal operation of the system.

[0003] For example, CN208670218U discloses an expansion valve with a clamping piece at the end of the solenoid valve stem. This solenoid valve is suitable for use in the field of household air conditioning and is prone to loosening under automobile working conditions. This is mainly because the car will generate various vibrations during driving, which may cause the block to loosen, thereby affecting the normal operation of the solenoid valve. Therefore, how to solve the problem of loose block has become one of the technical challenges that need to be solved in the current design and development of electromagnetic thermal expansion valves. Summary of the invention

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes an electromagnetic thermal expansion valve, which increases the stability of the connection by adding a positioning part on the clamping part, and uses the positioning part to press the end of the valve stem, thereby reducing the possibility of loosening under automobile working conditions, thereby ensuring the normal operation of the electromagnetic valve.

[0005] The technical solution adopted by the utility model is: to provide an electromagnetic thermal expansion valve, including a thermal expansion valve and a solenoid valve, the valve stem of the solenoid valve is connected with a clamping part, the clamping part includes an intermediate part, a locking part and a positioning part, the intermediate part has a clamping groove for clamping with the valve stem, the locking part and the positioning part are both formed by bending the same end of the intermediate part upward, and the locking part has a through hole adapted to the end of the valve stem, the positioning part is located in the through hole and is used to abut against the end of the valve stem.

[0006] Compared with the prior art, the above scheme improves the stability of the connection and reduces the possibility of loosening under automobile working conditions, thereby ensuring the normal operation of the solenoid valve.

[0007] According to one embodiment of the utility model, the positioning portion has an abutting end for abutting against the end of the valve stem, and the free end of the abutting end is tilted upward; that is, the free end of the abutting end is upwardly tilted, which is convenient for moving the abutting end to loosen the positioning portion, thereby facilitating the disassembly of the clamping part.

[0008] According to an embodiment of the utility model, one end of the middle portion away from the positioning portion is bent upward to form a reinforcement portion; the provision of the reinforcement portion can increase the anti-twisting ability of the clip and improve the strength of the structure.

[0009] According to an embodiment of the utility model, a circle of shaft end grooves is provided at the end of the valve stem, and the shaft end grooves are used to slide into the clamping grooves.

[0010] According to an embodiment of the utility model, a guiding cone surface is provided at the end of the valve stem, and the guiding cone surface is located at the upper part of the shaft end groove.

[0011] According to an embodiment of the utility model, the maximum outer diameter of the shaft end groove is R1, the maximum outer diameter of the valve stem end is R2, the width of the groove is H, and R2≥H≥R1.

[0012] According to one embodiment of the utility model, the solenoid valve includes a coil assembly, the coil assembly has a connector for an external circuit, the connector has a wiring terminal, and the wiring terminal is perpendicular or parallel to the valve stem; the electromagnetic thermal expansion valve for new energy vehicle air conditioning is limited by the installation space, and the electromagnetic coil structure with a wiring terminal perpendicular to the valve stem interferes when the wiring harness is connected. By changing the direction of the wiring terminal to make it parallel to the valve stem, that is, the direction of the connector is parallel to the valve stem, the interference area is avoided and the installation requirements are met.

[0013] According to an embodiment of the utility model, the solenoid valve further comprises a pressing sleeve, the pressing sleeve is located on the upper part of the coil assembly, the valve stem passes through the coil assembly and the pressing sleeve, and the clamping piece abuts against the pressing sleeve.

[0014] According to an embodiment of the utility model, an anti-skid structure is provided on the side of the abutting end surface facing the valve stem end; the anti-skid structure is used to increase the friction between the abutting end and the upper end surface of the valve stem to avoid relative displacement between the two under automobile operating conditions.

[0015] According to an embodiment of the utility model, the anti-skid structure is concave-convex or is coated with rubber to form an anti-skid soft rubber layer on the surface of the abutting end; the provision of the anti-skid soft rubber layer plays a certain shock-absorbing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A three-dimensional diagram of an electromagnetic thermal expansion valve in an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the electromagnetic thermal expansion valve in the embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a solenoid valve in an embodiment of the utility model;

[0020] Figure 4 A half-section stereoscopic view of a solenoid valve in an embodiment of the utility model;

[0021] Figure 5 A three-dimensional diagram of a clamping member in an embodiment of the utility model;

[0022] Figure 6 A half-section stereoscopic view of a clamping member in an embodiment of the utility model;

[0023] Figure 7 A bottom view of the clamping member in the embodiment of the utility model;

[0024] Figure 8 for Figure 7 Sectional view along line AA;

[0025] Fig. 9 It is a partial enlarged view of the end of the valve stem in the embodiment of the utility model.

[0026] Description of the numbers in the figure:

[0027] 1. Thermal expansion valve; 2. Solenoid valve; 3. Valve stem; 4. Connector;

[0028] 21. Coil assembly; 22. Terminal block; 23. Connector; 24. Press sleeve;

[0029] 31. Shaft end groove; 32. Guide cone surface;

[0030] 41. middle part; 42. locking part; 43. reinforcing part; 44. positioning part; 45. slot;

[0031] 42a, through hole; 44a, abutment end. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Embodiment 1

[0033] like Figure 1-9 As shown, in this embodiment, an electromagnetic thermal expansion valve 1 is disclosed, including a thermal expansion valve 1 and a solenoid valve 2, the valve stem 3 of the solenoid valve 2 is connected with a clamping member 4, the clamping member 4 includes an intermediate portion 41, a locking portion 42 and a positioning portion 44, the intermediate portion 41 has a clamping groove 45 for clamping with the valve stem 3, the locking portion 42 and the positioning portion 44 are both formed by bending the same end of the intermediate portion 41 upward, and the locking portion 42 has a through hole 42a adapted to the end of the valve stem 3, the positioning portion 44 is located in the through hole 42a and is used to abut against the end of the valve stem 3.

[0034] Furthermore, combined with Figure 1-3 As described above, in this embodiment, the solenoid valve 2 is fixedly mounted on the thermal expansion valve 1 , the upper end of the valve stem 3 of the solenoid valve 2 is the end of the valve stem 3 exposed to the outside, and the lower end of the valve stem 3 is a sealing end, which is equivalent to sealing the internal channel of the thermal expansion valve 1 .

[0035] Furthermore, the solenoid valve 2 includes a coil assembly 21, and the coil assembly 21 has a connector 23 for an external circuit, and the connector 23 has a terminal 22, and the terminal 22 is perpendicular or parallel to the valve stem 3; the electromagnetic thermal expansion valve 1 for new energy vehicle air conditioning is limited by the installation space, and the electromagnetic coil structure with the terminal 22 perpendicular to the valve stem 3 interferes when the wiring harness is connected. By changing the direction of the terminal 22 to make it parallel to the valve stem 3, that is, the direction of the connector 23 is parallel to the valve stem 3, the interference area is avoided and the installation requirements are met.

[0036] Furthermore, the coil assembly 21 is used to drive the valve stem 3 to move axially, so that the sealing end of the valve stem 3 moves toward or away from the thermal expansion valve 1. When the sealing end is close to the thermal expansion valve 1, the sealing end blocks the internal passage of the thermal expansion valve 1, and the thermal expansion valve 1 is in a closed state. When the sealing end is away from the thermal expansion valve 1, the sealing end is out of the sealing state of the internal passage of the thermal expansion valve 1, and the thermal expansion valve 1 is in an unlocked state or a passage state.

[0037] Furthermore, the solenoid valve 2 further comprises a pressing sleeve 24 , which is located on the upper part of the coil assembly 21 , the valve stem 3 passes through the coil assembly 21 and the pressing sleeve 24 , and the clamping member 4 abuts against the pressing sleeve 24 .

[0038] Specifically, combined Figure 5-7 As shown, the positioning portion 44 has an abutting end 44a for abutting against the end of the valve stem 3, and the free end of the abutting end 44a is tilted upward; that is, the free end of the abutting end 44a is tilted upward, which is convenient for moving the abutting end 44a to loosen the positioning portion 44, which is conducive to the removal of the clamping member 4. The end of the middle portion 41 away from the positioning portion 44 is bent upward to form a reinforcement portion 43; the setting of the reinforcement portion 43 can increase the anti-torsion ability of the clamping member 4 and improve the strength of the structure.

[0039] Specifically, combined Figure 3 and Fig. 9 As shown, the end of the valve stem 3 is provided with a circle of shaft end grooves 31, and the shaft end grooves 31 are used to slide into the clamping groove 45. The end of the valve stem 3 is provided with a guide cone 32, and the guide cone 32 is located at the upper part of the shaft end groove 31. When the shaft end groove 31 slides into the clamping groove 45, the abutment end 44a abuts against the guide cone 32, and the guide abutment end 44a bounces upward to make the positioning part 44 abut against the end of the valve stem 3. The maximum outer diameter of the shaft end groove 31 is R1, the maximum outer diameter of the end of the valve stem 3 is R2, and the width of the clamping groove 45 is H, R2≥H≥R1.

[0040] Specifically, in another embodiment, an anti-slip structure is provided on the side of the abutting end 44a facing the end of the valve stem 3, and the anti-slip structure is concave-convex, that is, the anti-slip structure is a concave-convex tooth-like structure.

[0041] In another embodiment, the anti-skid structure is an anti-skid soft rubber layer formed on the surface of the abutting end 44a by rubber encapsulation; the provision of the anti-skid soft rubber layer plays a certain shock-absorbing role.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An electromagnetic thermal expansion valve, Features: It includes a thermal expansion valve and a solenoid valve, the valve stem of the solenoid valve is connected with a clamping part, the clamping part includes an intermediate part, a locking part and a positioning part, the intermediate part has a clamping groove for clamping with the valve stem, the locking part and the positioning part are both formed by bending the same end of the intermediate part upward, and the locking part has a through hole adapted to the end of the valve stem, the positioning part is located in the through hole and is used to abut against the end of the valve stem.

2. The electromagnetic thermal expansion valve according to claim 1, Features: The positioning portion has an abutting end for abutting against the end of the valve stem, and the free end of the abutting end is arranged to be inclined upward.

3. The electromagnetic thermal expansion valve according to claim 1, Features: One end of the middle portion away from the positioning portion is bent upward to form a reinforcement portion.

4. The electromagnetic thermal expansion valve according to claim 1, Features: The end of the valve stem is provided with a circle of shaft end grooves, and the shaft end grooves are used for sliding into the clamping grooves.

5. The electromagnetic thermal expansion valve according to claim 4, Features: The end of the valve stem is provided with a guiding cone surface, and the guiding cone surface is located at the upper part of the shaft end groove.

6. The electromagnetic thermal expansion valve according to claim 4, Features: The maximum outer diameter of the shaft end groove is R1, the maximum outer diameter of the valve stem end is R2, the width of the slot is H, and R2≥H≥R1.

7. The electromagnetic thermal expansion valve according to claim 1, Features: The solenoid valve comprises a coil assembly, the coil assembly has a connector for an external circuit, the connector has a wiring terminal, and the wiring terminal is perpendicular or parallel to the valve stem.

8. The electromagnetic thermal expansion valve according to claim 7, Features: The solenoid valve further comprises a pressing sleeve, which is located on the upper part of the coil assembly. The valve stem passes through the coil assembly and the pressing sleeve, and the clamping member abuts against the pressing sleeve.

9. The electromagnetic thermal expansion valve according to claim 2, Features: An anti-slip structure is provided on one side of the abutting end surface facing the end of the valve stem.

10. The electromagnetic thermal expansion valve according to claim 9, Features: The anti-skid structure is concave-convex or is encapsulated with rubber to form an anti-skid soft rubber layer on the surface of the abutting end.

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