Electronic expansion valve

Abstract

The present disclosure relates to an electronic expansion valve. A positive terminal of a coil assembly is electrically connected to an adapter board, and is electrically connected to a positive pin through the adapter board. Moreover, a negative terminal of the coil assembly is electrically connected to the adapter board, and is electrically connected to a negative pin through the adapter board. Therefore, when the positions of the positive terminal and the negative terminal of the coil assembly change, the connection positions of the positive terminal and the negative terminal on the adapter board can change accordingly, and still maintain electrical connection with the positive pin and the negative pin, so that the connection positions of the positive pin and the negative pin on the circuit board do not need to change. As a result, the electronic expansion valve has the advantage of high compatibility and can be compatible with coil assemblies of different structures.

Description

[0001] DESCRIPTION

[0002] ELECTRONIC EXPANSION VALVE

[0003] Technical Field

[0004] The present disclosure relates to an electronic expansion valve, and in particular to an electronic expansion valve for an automobile air conditioning system.

[0005] Background Art

[0006] An electronic expansion valve in the prior art includes an outer shell, a circuit board and a coil assembly. The coil assembly includes a metal housing, a winding, a positive terminal and a negative terminal. The winding is disposed in the metal housing and is electrically connected to the circuit board through the positive terminal and the negative terminal. The outer shell can be formed by a secondary injection moulding process to enclose the coil assembly, and the circuit board is disposed in the outer shell.

[0007] The number of windings is usually multiple, resulting in multiple positive terminals and negative terminals. In the prior art, after the positive terminal and the negative terminal are plugged into the circuit board, if the positions for electrical connection of the positive terminal and the negative terminal on the circuit board need to be modified, it is relatively difficult, which makes the electronic expansion valve in the prior art not highly compatible with coil assemblies of different structures.

[0008] Summary of the Disclosure

[0009] An objective of the present disclosure is to provide an electronic expansion valve, which has the advantage of high compatibility. An electronic expansion valve for achieving the objective comprises an outer shell, a circuit board and a coil assembly, wherein the coil assembly comprises a winding, a positive terminal and a negative terminal; the winding is respectively electrically connected to the positive terminal and the negative terminal; the electronic expansion valve further comprises an adapter board, a positive pin and a negative pin; the positive pin is respectively electrically connected to the circuit board and the adapter board; the negative pin is respectively electrically connected to the circuit board and the adapter board; the positive terminal is electrically connected to the adapter board and is electrically connected to the positive pin through the adapter board; and the negative terminal is electrically connected to the adapter board and is electrically connected to the negative pin through the adapter board.

[0010] In a specific embodiment, the positive pin is respectively plugged into the circuit board and the adapter board; and / or the negative pin is respectively plugged into the circuit board and the adapter board.

[0011] In a specific embodiment, the positive terminal is plugged into the adapter board; and / or the negative terminal is plugged into the adapter board.

[0012] In a specific embodiment, the winding comprises a first winding and a second winding; the positive terminal comprises a first positive terminal and a second positive terminal; the negative terminal comprises a first negative terminal and a second negative terminal; the first winding is respectively electrically connected to the first positive terminal and the first negative terminal; the second winding is respectively electrically connected to the second positive terminal and the second negative terminal; the positive pin comprises a first positive pin and a second positive pin; the negative pin comprises a first negative pin and a second negative pin; the first positive terminal is electrically connected to the first positive pin through the adapter board, and the first positive pin is electrically connected to the circuit board; the first negative terminal is electrically connected to the first negative pin through the adapter board, and the first negative pin is electrically connected to the circuit board; and the second positive terminal is electrically connected to the second positive pin through the adapter board, and the second positive pin is electrically connected to the circuit board; and the second negative terminal is electrically connected to the second negative pin through the adapter board, and the second negative pin is electrically connected to the circuit board.

[0013] In a specific embodiment, the electronic expansion valve further comprises a reinforcement; and the positive pin and the negative pin penetrate the reinforcement and are fixed in the reinforcement.

[0014] In a specific embodiment, the reinforcement is disposed between the adapter board and the circuit board.

[0015] In a specific embodiment, the adapter board is parallel to the circuit board.

[0016] In a specific embodiment, the first positive terminal and the first negative terminal are disposed adjacent to each other; and the second positive terminal and the second negative terminal are disposed adjacent to each other.

[0017] In a specific embodiment, the coil assembly comprises a metal housing; and the winding is disposed in the metal housing.

[0018] In a specific embodiment, the adapter board comprises a first conductive sheet and a second conductive sheet; the first conductive sheet is respectively electrically connected to the positive terminal and the positive pin; and the second conductive sheet is respectively electrically connected to the negative terminal and the negative pin. The present disclosure has the following positive improved effects: The positive terminal of the coil assembly is electrically connected to the adapter board, and is electrically connected to the positive pin through the adapter board. Moreover, the negative terminal of the coil assembly is electrically connected to the adapter board, and is electrically connected to the negative pin through the adapter board. Therefore, when the positions of the positive terminal and the negative terminal of the coil assembly change, the connection positions of the positive terminal and the negative terminal on the adapter board can change accordingly, and still maintain electrical connection with the positive pin and the negative pin, so that the connection positions of the positive pin and the negative pin on the circuit board do not need to change. As a result, the electronic expansion valve has the advantage of high compatibility and can be compatible with coil assemblies of different structures.

[0019] Brief Description of the Drawings

[0020] The above and other features, properties and advantages of the present disclosure will become more apparent through the following description with reference to the drawings and embodiments, wherein:

[0021] FIG. 1 is a schematic diagram of an electronic expansion valve;

[0022] FIG. 2 is a schematic diagram of an electronic expansion valve, with an outer shell omitted; and

[0023] FIG. 3 is a partial schematic diagram of an electronic expansion valve, with an outer shell omitted.

[0024] Detailed Description of the Embodiments

[0025] Various different implementations or embodiments of the technical solution of the subject matter implemented are disclosed below. To simplify the disclosed content, specific examples of various elements and arrangements are described below. Of course, these are only examples and are not intended to limit the scope of the present disclosure. For example, the distribution of a first feature at a second feature as disclosed below may include an implementation in which the first and second features are distributed by direct connection, but may also include an implementation in which an additional feature is formed between the first and second features, so that there may be no direct connection between the first and second features. In addition, in this content, reference signs and / or letters might be repeated in different examples. This repetition is for purposes of brevity and clarity, rather than representing any relationships between various implementations and / or structures to be discussed. Furthermore, when a first element is described as being connected or joined to a second element, this description includes an implementation in which the first and second elements are directly connected or joined together, and also includes the addition of one or more other intervening elements so that the first and second elements are indirectly connected or joined together.

[0026] It should be noted that FIGS. 1 -3 are all merely examples and are not drawn to the same scale, and should not be regarded as limiting the scope of protection actually claimed for the present disclosure.

[0027] A refrigeration circuit of an air-conditioning system includes a compressor, a condenser, a throttling mechanism and an evaporator. The throttling mechanism includes an electronic expansion valve. The electronic expansion valve is suitable for the refrigeration circuit of the air-conditioning system, and is used to throttle and expand a refrigerant.

[0028] FIGS. 1, 2 and 3 show an electronic expansion valve 90 in an embodiment of the present disclosure. The electronic expansion valve includes an outer shell 1, a circuit board 2, a coil assembly 3, and a valve body 8. The coil assembly 3 includes a winding 31, a positive terminal 32, and a negative terminal 33. The winding 31 is respectively electrically connected to the positive terminal 32 and the negative terminal 33. A current can flow through the winding 31 via the positive terminal 32 and the negative terminal 33. The valve body 8 has an inlet and an outlet for the refrigerant. The outer shell 1 encloses the coil assembly 3 by a secondary injection moulding process. The outer shell 1 is connected to the valve body 8.

[0029] The electronic expansion valve 90 further includes an adapter board 4, a positive pin 5 and a negative pin 6. The positive pin 5 is respectively electrically connected to the circuit board 2 and the adapter board 4. The negative pin 6 is respectively electrically connected to the circuit board 2 and the adapter board 4. The positive terminal 32 is electrically connected to the adapter board 4, and is electrically connected to the positive pin 5 through the adapter board 4. The negative terminal 33 is electrically connected to the adapter board 4, and is electrically connected to the negative pin 6 through the adapter board 4. The adapter board 4 may have the same material as the circuit board 2.

[0030] The positive terminal 32 of the coil assembly 3 is electrically connected to the adapter board 4, and is electrically connected to the positive pin 5 through the adapter board 4. Moreover, the negative terminal 33 of the coil assembly 3 is electrically connected to the adapter board 4, and is electrically connected to the negative pin 6 through the adapter board 4. Therefore, when the positions of the positive terminal 32 and the negative terminal 33 of the coil assembly 3 change, the connection positions of the positive terminal 32 and the negative terminal 33 on the adapter board 4 can change accordingly, and still maintain electrical connection with the positive pin 5 and the negative pin 6, so that the connection positions of the positive pin 5 and the negative pin 6 on the circuit board 2 do not need to change. As a result, the electronic expansion valve has the advantage of high compatibility and can be compatible with coil assemblies 3 of different structures.

[0031] As shown in FIG. 3, the positive pin 5 is respectively plugged into the circuit board 2 and the adapter board 4, and / or the negative pin 6 is respectively plugged into the circuit board 2 and the adapter board 4. More specifically, the adapter board 4 is provided with a first plug-in through hole (not shown in the figure), and the positive pin 5 and the negative pin 6 can penetrate the first plug-in through hole.

[0032] Continuing to refer to FIG. 3, the positive terminal 32 is plugged into the adapter board 4, and / or the negative terminal 33 is plugged into the adapter board 4. More specifically, the adapter board 4 is provided with a second plug-in through hole (not shown in the figure), and the positive terminal 32 and the negative terminal 33 can penetrate the second plug-in through hole.

[0033] As shown in FIGS. 2 and 3, the winding 31 includes a first winding 31a and a second winding 31 b. The positive terminal 32 includes a first positive terminal 32a and a second positive terminal 32b. The negative terminal 33 includes a first negative terminal 33a and a second negative terminal 33b. The first winding 31a is respectively electrically connected to the first positive terminal 32a and the first negative terminal 33a. The second winding 31 b is respectively electrically connected to the second positive terminal 32b and the second negative terminal 33b. The positive pin 5 includes a first positive pin 5a and a second positive pin 5b. The negative pin 6 includes a first negative pin 6a and the second negative pin 6b. The first positive terminal 32a is electrically connected to the first positive pin 5a through the adapter board 4, and the first positive pin 5a is electrically connected to the circuit board 2. The first negative terminal 33a is electrically connected to the first negative pin 6a through the adapter board 4, and the first negative pin 6a is electrically connected to the circuit board 2. The second positive terminal 32b is electrically connected to the second positive pin 5b through the adapter board 4, and the second positive pin 5b is electrically connected to the circuit board 2. The second negative terminal 33b is electrically connected to the second negative pin 6b through the adapter board 4, and the second negative pin 6b is electrically connected to the circuit board 2.

[0034] Continuing to refer to FIG. 2, the electronic expansion valve 90 further includes a reinforcement 7. The positive pin 5 and the negative pin 6 penetrate the reinforcement 7 and are fixed in the reinforcement 7. The reinforcement 7 can prevent the relative positions of the positive pin 5 and the negative pin 6 from changing. More specifically, the reinforcement 7 is disposed between the adapter board 4 and the circuit board 2. In a specific embodiment, as shown in FIGS. 2 and 3, the adapter board 4 is parallel to the circuit board 2.

[0035] As shown in FIG. 3, the first positive terminal 32a and the first negative terminal 33a are disposed adjacent to each other, and the second positive terminal 32b and the second negative terminal 33b are disposed adjacent to each other. The first negative terminal 33a and the second positive terminal 32b are disposed adjacent to each other.

[0036] In an embodiment not shown in the figures, the first positive terminal 32a may also be disposed adjacent to the second positive terminal 32b, and the first negative terminal 33a may also be disposed adjacent to the second negative terminal 33b. The second positive terminal 32b and the first negative terminal 33a are disposed adjacent to each other.

[0037] As shown in FIGS. 2 and 3, the coil assembly 3 includes a metal housing 30, and the winding 31 is disposed in the metal housing 30. The adapter board 4 includes a first conductive sheet 4a and a second conductive sheet 4b. The first conductive sheet 4a is respectively electrically connected to the positive terminal 32 and the positive pin 5. The second conductive sheet 4b is respectively electrically connected to the negative terminal 33 and the negative pin 6. The first conductive sheet 4a and the second conductive sheet 4b may be thin conductive metal sheets.

[0038] Although the present disclosure has been disclosed above with reference to preferred embodiments, they are not intended to limit the present disclosure. Any person skilled in the art would have made possible changes and amendments without departing from the spirit and scope of the present disclosure, and any amendments, equivalent changes and modifications made to the above embodiments according to the technical essence of the present disclosure, without departing from the technical solutions of the present disclosure, all fall within the scope of protection defined by the claims of the present disclosure.

Claims

CLAIMS1. Electronic expansion valve, comprising an outer shell (1), a circuit board (2) and a coil assembly (3); the coil assembly (3) comprising a winding (31), a positive terminal (32) and a negative terminal (33); and the winding (31) being respectively electrically connected to the positive terminal (32) and the negative terminal (33), characterized in that the electronic expansion valve (90) further comprises an adapter board (4), a positive pin (5) and a negative pin (6); the positive pin (5) is respectively electrically connected to the circuit board (2) and the adapter board (4); the negative pin (6) is respectively electrically connected to the circuit board (2) and the adapter board (4); the positive terminal (32) is electrically connected to the adapter board (4) and is electrically connected to the positive pin (5) through the adapter board (4); and the negative terminal (33) is electrically connected to the adapter board (4) and is electrically connected to the negative pin (6) through the adapter board (4).

2. Electronic expansion valve according to Claim 1, characterized in that the positive pin (5) is respectively plugged into the circuit board (2) and the adapter board (4); and / or the negative pin (6) is respectively plugged into the circuit board (2) and the adapter board (4).

3. Electronic expansion valve according to Claim 1, characterized in that the positive terminal (32) is plugged into the adapter board (4); and / or the negative terminal (33) is plugged into the adapter board (4).

4. Electronic expansion valve according to Claim 1, characterized in that the winding (31) comprises a first winding (31a) and a second winding (31 b); thepositive terminal (32) comprises a first positive terminal (32a) and a second positive terminal (32b); the negative terminal (33) comprises a first negative terminal (33a) and a second negative terminal (33b); the first winding (31a) is respectively electrically connected to the first positive terminal (32a) and the first negative terminal (33a); the second winding (31 b) is respectively electrically connected to the second positive terminal (32b) and the second negative terminal (33 b); the positive pin (5) comprises a first positive pin (5a) and a second positive pin (5b); the negative pin (6) comprises a first negative pin (6a) and a second negative pin (6b); the first positive terminal (32a) is electrically connected to the first positive pin (5a) through the adapter board (4), and the first positive pin (5a) is electrically connected to the circuit board (2); the first negative terminal (33a) is electrically connected to the first negative pin (6a) through the adapter board (4), and the first negative pin (6a) is electrically connected to the circuit board (2); and the second positive terminal (32b) is electrically connected to the second positive pin (5b) through the adapter board (4), and the second positive pin (5b) is electrically connected to the circuit board (2); and the second negative terminal (33b) is electrically connected to the second negative pin (6b) through the adapter board (4), and the second negative pin (6b) is electrically connected to the circuit board (2).

5. Electronic expansion valve according to Claim 1, characterized in that the electronic expansion valve (90) further comprises a reinforcement (7); and the positive pin (5) and the negative pin (6) penetrate the reinforcement (7) and are fixed in the reinforcement (7).

6. Electronic expansion valve according to Claim 5, characterized in that the reinforcement (7) is disposed between the adapter board (4) and the circuit board (2).

7. Electronic expansion valve according to Claim 1, characterized in that the adapter board (4) is parallel to the circuit board (2).

8. Electronic expansion valve according to Claim 4, characterized in that the first positive terminal (32a) and the first negative terminal (33a) are disposed adjacent to each other; and the second positive terminal (32b) and the second negative terminal (33b) are disposed adjacent to each other.

9. Electronic expansion valve according to Claim 1, characterized in that the coil assembly (3) comprises a metal housing (30); and the winding (31) is disposed in the metal housing (30).

10. Electronic expansion valve according to Claim 1, characterized in that the adapter board (4) comprises a first conductive sheet (4a) and a second conductive sheet (4b); the first conductive sheet (4a) is respectively electrically connected to the positive terminal (32) and the positive pin (5); and the second conductive sheet (4b) is respectively electrically connected to the negative terminal (33) and the negative pin (6).

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