Electronic expansion valve, air conditioning system and vehicle

Abstract

The utility model discloses an electronic expansion valve, an air conditioning system and a vehicle, the electronic expansion valve comprises a valve body, a valve cavity is defined in the valve body, and a fluid interface and a suction interface which are communicated with the valve cavity and arranged at intervals are formed in the valve body; the negative pressure device comprises a negative pressure driving part and a connecting pipe, and an inlet of the negative pressure driving part is connected with the suction connector through the connecting pipe so that negative pressure generated by the negative pressure driving part can be transmitted into the valve cavity. According to the electronic expansion valve, due to the fact that the negative pressure device is arranged, when the fluid connector is blocked by foreign matter, the negative pressure device can suck the foreign matter out of the valve cavity from the fluid connector, a refrigerant channel can be rapidly unblocked, the foreign matter is prevented from blocking the fluid connector again, and therefore the reliability of an air conditioning system in the working process is improved; and the reliability of the vehicle in the working process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an electronic expansion valve, an air conditioning system and a vehicle. Background Art

[0002] The air-conditioning system is an important part of the vehicle, and the electronic expansion valve is an important part of the air-conditioning system. During the production process, foreign matter such as slag will be generated in the air-conditioning pipeline, and it may not be possible to completely remove these foreign matter during the vehicle assembly process. In related technologies, foreign matter will block the electronic expansion valve, which will affect the reliability of the air-conditioning system and the vehicle during operation. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an electronic expansion valve, which can improve the reliability of the air conditioning system during operation.

[0004] The utility model also provides an air conditioning system with the electronic expansion valve.

[0005] The utility model also provides a vehicle with the air conditioning system.

[0006] The electronic expansion valve according to the first aspect of the utility model comprises: a valve body, a valve cavity is defined in the valve body, a fluid interface and a suction interface which are connected to the valve cavity and arranged at intervals are formed on the valve body; a negative pressure device, the negative pressure device comprises a negative pressure driving member and a connecting pipe, the inlet of the negative pressure driving member is connected to the suction interface through the connecting pipe, so as to transfer the negative pressure generated by the negative pressure driving member to the valve cavity.

[0007] According to the electronic expansion valve of the first aspect of the utility model, by providing a negative pressure device, when foreign matter blocks the fluid interface, the negative pressure device can suck the foreign matter out of the valve cavity from the fluid interface, so that the refrigerant passage can be quickly unblocked and these foreign matter can be prevented from blocking the fluid interface again, thereby improving the reliability of the air-conditioning system during operation, and further improving the reliability of the vehicle during operation.

[0008] According to some embodiments of the present utility model, the suction interface comprises a plurality of suction interfaces, the plurality of suction interfaces are arranged at intervals, and the number of the connecting pipes corresponds one to one to the number of the suction interfaces.

[0009] According to some embodiments of the utility model, the multiple suction interfaces include a first interface and a second interface, the fluid interfaces are two and are respectively a fluid inlet and a fluid outlet, the first interface is arranged close to and toward the fluid inlet, and the second interface is arranged close to and toward the fluid outlet.

[0010] According to some embodiments of the utility model, the electronic expansion valve also includes: a one-way valve, which is connected in series between the inlet of the negative pressure drive component and the suction interface, and the one-way valve is configured to only allow the fluid to flow in one direction from the valve chamber toward the inlet of the negative pressure drive component.

[0011] According to some embodiments of the present utility model, the electronic expansion valve further comprises: a filter element, which is disposed in the valve cavity and is suitable for covering an end of the fluid interface facing the valve cavity.

[0012] According to some embodiments of the present utility model, the electronic expansion valve further includes: a first motor, wherein the first motor is connected to the filter element and is used to drive the filter element to move so as to adjust the opening of the fluid interface.

[0013] According to some embodiments of the present invention, the filter element is movable in a plane perpendicular to the axis of the fluid interface.

[0014] According to some embodiments of the utility model, the electronic expansion valve also includes: a guide rail, which extends along the moving direction of the filter element. The number of the guide rails is two and they are respectively arranged on the opposite sides of the filter element, and the two ends of the filter element perpendicular to the moving direction are respectively slidably matched with the two guide rails.

[0015] According to some embodiments of the present utility model, a screw mechanism is connected between the first motor and the filter element.

[0016] According to some embodiments of the present invention, both the fluid inlet and the fluid outlet are provided with the filter element.

[0017] According to some embodiments of the present utility model, the negative pressure device further includes a shell, a negative pressure chamber is defined in the shell, and the negative pressure driving element is disposed in the negative pressure chamber.

[0018] An air conditioning system according to a second aspect of the utility model comprises the electronic expansion valve according to the first aspect of the utility model.

[0019] According to the air conditioning system of the second aspect of the utility model, by providing the electronic expansion valve according to the first aspect of the utility model, the reliability of the air conditioning system during operation can be improved.

[0020] A vehicle according to a third aspect of the utility model comprises: the air conditioning system according to the second aspect of the utility model.

[0021] According to the vehicle of the third aspect of the utility model, by providing the air conditioning system according to the second aspect of the utility model, the reliability of the vehicle during operation can be improved.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an electronic expansion valve according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the electronic expansion valve from another angle shown in FIG.

[0025] Figure 3 yes Figure 2 Schematic diagram of the filter element, the first motor, the screw mechanism and the guide rail shown in FIG.

[0026] Reference numerals:

[0027] 100. Electronic expansion valve;

[0028] 10. valve body; 11. valve chamber; 12. fluid interface; 12a. fluid inlet; 12b. fluid outlet; 13. suction interface; 13a. first interface; 13b. second interface;

[0029] 20. Negative pressure device; 21. Negative pressure driving member; 211. Second motor; 212. Negative pressure fan; 22. Connecting pipe; 23. Shell; 231. Negative pressure chamber;

[0030] 30. One-way valve;

[0031] 40. Filter element;

[0032] 50. First motor;

[0033] 60. Guide rails;

[0034] 70. Screw mechanism. DETAILED DESCRIPTION

[0035] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] Reference below Figure 1-Figure 3 An electronic expansion valve 100 according to an embodiment of the first aspect of the present utility model is described.

[0037] like Figure 1 and Figure 2As shown, the electronic expansion valve 100 according to the first embodiment of the utility model includes: a valve body 10 and a negative pressure device 20.

[0038] Specifically, a valve cavity 11 is defined in the valve body 10, and a fluid interface 12 and a suction interface 13 which are connected to the valve cavity 11 and arranged at intervals are formed on the valve body 10. The negative pressure device 20 includes a negative pressure driving member 21 and a connecting pipe 22. The inlet of the negative pressure driving member 21 is connected to the suction interface 13 through the connecting pipe 22 to transfer the negative pressure generated by the negative pressure driving member to the valve cavity.

[0039] Among them, the electronic expansion valve 100 is a throttling element that can adjust the refrigerant flow entering the refrigeration device according to a preset program. The refrigerant enters and exits the valve chamber 11 from the fluid interface 12. The negative pressure driving component 21 can generate negative pressure, and the connecting component can transfer the negative pressure generated by the negative pressure driving component 21 to the valve chamber 11 through the suction interface 13.

[0040] During the operation of the vehicle, the air-conditioning system will participate in the temperature regulation of multiple parts. For example, the air-conditioning system can adjust the temperature of the passenger space in the vehicle to make passengers feel comfortable. The air-conditioning system can also participate in the cooling of the battery pack, and the air-conditioning system has a higher heat exchange efficiency, which can improve the cooling effect on the battery pack.

[0041] During the operation of the air conditioning system, the electronic expansion valve 100 is connected to the air conditioning pipeline, and the refrigerant in the air conditioning pipeline flows into and out of the valve cavity 11 from the fluid interface 12. The refrigerant circulates continuously in the pipeline of the air conditioning system, so that the air conditioning system can achieve the function of temperature regulation. It can be understood by those skilled in the art that the refrigerant flow channel in the electronic expansion valve 100 is relatively small. When foreign matter such as slag in the air conditioning pipeline passes through the electronic expansion valve 100 together with the refrigerant, the foreign matter may block the fluid interface 12 of the electronic expansion valve 100, thereby reducing the refrigerant flow in the air conditioning system or even interrupting the flow, thereby affecting the reliability of the vehicle.

[0042] In this embodiment, by providing a negative pressure device 20, during the operation of the air-conditioning system, when it is detected that the refrigerant flow in the valve cavity 11 becomes smaller or even the flow is interrupted, the negative pressure driving member 21 generates negative pressure and transmits the negative pressure from the suction interface 13 to the valve cavity 11 through the connecting pipe 22. Under the action of the negative pressure, foreign matter can be sucked into the valve cavity 11 from the fluid interface 12, and then the negative pressure sucks the foreign matter in the valve cavity 11 into the negative pressure device 20. In this way, the refrigerant flow channel can be quickly unblocked, and sucking foreign matter out of the valve cavity 11 can prevent these foreign matter from blocking the fluid interface 12 again.

[0043] According to the electronic expansion valve 100 of the first aspect of the utility model, by providing a negative pressure device 20, when foreign matter blocks the fluid interface 12, the negative pressure device 20 can suck the foreign matter out of the valve cavity 11 from the fluid interface 12, so that the refrigerant passage can be quickly unblocked, and these foreign matter can be prevented from blocking the fluid interface 12 again, thereby improving the reliability of the air-conditioning system during operation, and further improving the reliability of the vehicle during operation.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the suction interface 13 includes multiple, for example, the suction interface 13 can be two, three or four, and the multiple suction interfaces 13 are arranged at intervals, and the number of connecting pipes 22 corresponds to the number of suction interfaces 13. In this way, each suction interface 13 can transfer the negative pressure of the negative pressure device 20 to the valve cavity 11, so that the negative pressure is more evenly distributed in the valve cavity 11, reducing the probability that the negative pressure at the fluid interface 12 is too small to suck out foreign matter, and reducing the probability that the negative pressure in some areas of the valve cavity 11 is too small to suck foreign matter out of the valve cavity 11 into the negative pressure device 20, thereby improving the effect of the negative pressure device 20, thereby further improving the reliability of the air-conditioning system during operation, and improving the reliability of the vehicle during operation.

[0045] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the plurality of suction interfaces 13 include a first interface 13a and a second interface 13b, and the number of fluid interfaces 12 is two, namely a fluid inlet 12a and a fluid outlet 12b. The refrigerant flows into the valve cavity 11 from the fluid inlet 12a and flows out of the valve cavity 11 from the fluid outlet 12b.

[0046] The first interface 13a is arranged close to and toward the fluid inlet 12a, and the second interface 13b is arranged close to and toward the fluid outlet 12b. In this way, during the operation of the negative pressure device 20, the negative pressure loss between the first interface 13a and the fluid inlet 12a and between the second interface 13b and the fluid outlet 12b is small, thereby improving the effect of the negative pressure device 20, and under the premise of ensuring that the negative pressure at the fluid inlet 12a and the fluid interface 12 can suck out the blocked foreign matter and suck it into the negative pressure device 20, the power of the negative pressure driving member 21 can be made small. It can be understood that the greater the power of the negative pressure driving member 21, the higher the production cost, thereby reducing the production cost.

[0047] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the electronic expansion valve 100 further includes: a one-way valve 30, which is connected in series between the inlet of the negative pressure driving member 21 and the suction interface 13, and the one-way valve 30 is configured to only allow the fluid to flow from the valve cavity 11 to the inlet of the negative pressure driving member 21 in one direction. In this way, when the negative pressure device 20 sucks foreign matter out of the valve cavity 11, the one-way valve 30 can prevent the foreign matter from returning from the negative pressure device 20 to the valve cavity 11, thereby further improving the reliability of the air conditioning system during operation.

[0048] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the electronic expansion valve 100 further includes: a filter element 40, which is disposed in the valve cavity 11 and is suitable for covering one end of the fluid interface 12 facing the valve cavity 11. When the filter element 40 blocks the fluid interface 12, the filter element 40 can filter the refrigerant flowing out of and into the fluid interface 12. It can be understood that the difficulty of sucking foreign matter out of the valve cavity 11 from the filter element 40 is less than the difficulty of sucking foreign matter out of the valve cavity 11 from the fluid interface 12, thereby further improving the reliability of the air conditioning system during operation.

[0049] Among them, the filter element 40 is suitable for covering one end of the fluid interface 12 facing the valve chamber 11, that is, the filter element 40 is movable relative to the fluid interface 12. In this way, during the operation of the filter element 40, the blocking of the fluid interface 12 by the filter element 40 can be adjusted according to different working stages or different working conditions. For example, when the vehicle is just started to be used, there may be a lot of debris and other foreign matter in the air-conditioning pipeline, and the degree of blocking of the fluid interface 12 by the filter element 40 can be increased. When the refrigerant flow in the air-conditioning system pipeline tends to be stable after the vehicle has been used for a period of time, the degree of blocking of the fluid interface 12 by the filter element 40 can be reduced, thereby increasing the flow rate of the refrigerant and further improving the effect of the air-conditioning system.

[0050] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the electronic expansion valve 100 further includes: a first motor 50, which is connected to the filter element 40 and is used to drive the filter element 40 to move so as to adjust the opening of the fluid interface 12. The motor drive is easy to arrange and has a fast response. By driving the filter element 40 to move by the first motor 50, the difficulty of assembly can be reduced, and the filter element 40 can be quickly adjusted into place, thereby improving the effect of the filter element 40.

[0051] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the filter element 40 is movable in a plane perpendicular to the axis of the fluid interface 12. In this way, the filter element 40 can adjust the opening of the fluid interface 12, and the flow direction of the refrigerant in the fluid interface 12 can be made perpendicular to the filter element 40. When foreign matter hits the filter element 40, the probability of the filter element 40 intercepting the foreign matter can be increased, thereby improving the filtering effect of the filter element 40 on the refrigerant.

[0052] In some embodiments of the present invention, Figure 3 As shown, the electronic expansion valve 100 further includes: a guide rail 60, which extends along the moving direction of the filter element 40. There are two guide rails 60, which are arranged on opposite sides of the filter element 40, respectively. The two ends of the filter element 40 perpendicular to the moving direction are respectively slidably matched with the two guide rails 60. By providing the guide rail 60, the guide rail 60 can provide guidance and limit for the filter element 40 during the movement of the filter element 40, thereby improving the stability of the filter element 40 during the movement process, and can improve the position accuracy of the filter element 40 when adjusting the position. Among them, the two guide rails 60 guide and limit the filter element 40 at both ends of the filter element 40, which can improve the effect of the guide rail 60.

[0053] In some embodiments of the present invention, Figure 1-Figure 3 As shown, a screw mechanism 70 is connected between the first motor 50 and the filter element 40. The screw mechanism 70 can realize the first motor 50 driving the filter element 40 to move in a plane perpendicular to the axial direction of the fluid interface 12, and the screw mechanism 70 has a large rigidity. When the first motor 50 drives the filter element 40 to move through the screw mechanism 70, the response is fast, so that the filter element 40 can be quickly adjusted into place, further improving the effect of the filter element 40.

[0054] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, both the fluid inlet 12a and the fluid outlet 12b are provided with a filter 40. Thus, the filter 40 can filter the refrigerant flowing into the fluid inlet 12a and the refrigerant flowing out of the fluid outlet 12b when necessary, thereby further reducing the probability of foreign matter blocking the fluid interface 12 and improving the reliability of the air conditioning system and the vehicle.

[0055] In some embodiments of the present invention, Figure 2 As shown, the negative pressure driving member 21 includes: a second motor 211 and a negative pressure fan 212. The second motor 211 drives the negative pressure fan 212 to rotate to generate negative pressure. In this way, the negative pressure driving member 21 has a simple structure and is easy to arrange, thereby improving production efficiency.

[0056] In some embodiments of the present invention, Figure 2As shown, the negative pressure device 20 also includes a shell 23, in which a negative pressure chamber 231 is defined. The negative pressure driving member 21 is disposed in the negative pressure chamber 231. By setting the shell 23, it can cooperate with the negative pressure driving member 21 to generate negative pressure in the negative pressure chamber 231, thereby achieving suction of foreign matter in the valve chamber 11, and the sucked foreign matter can be collected in the negative pressure chamber 231.

[0057] The air conditioning system according to the second embodiment of the utility model comprises the electronic expansion valve 100 according to the first embodiment of the utility model.

[0058] According to the air conditioning system of the second embodiment of the utility model, by providing the electronic expansion valve 100 according to the first embodiment of the utility model, the reliability of the air conditioning system during operation can be improved.

[0059] In some embodiments of the present invention, the air conditioning system further comprises: a flow detector, which is connected to the flow channel of the refrigerant to detect the flow rate of the refrigerant. In this way, during the operation of the air conditioning system, the working state of the negative pressure device 20 and the filter element 40 can be adjusted according to the detection result of the flow detector.

[0060] A vehicle according to an embodiment of the third aspect of the utility model comprises: the air conditioning system according to the embodiment of the second aspect of the utility model.

[0061] The vehicle according to the third aspect of the present invention can improve the reliability of the vehicle during operation by providing the air conditioning system according to the second aspect of the present invention.

[0062] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0063] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] 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, without contradiction.

[0066] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electronic expansion valve, characterized in that: include: A valve body, wherein a valve cavity is defined in the valve body, and a fluid interface and a suction interface which are communicated with the valve cavity and are arranged at intervals are formed on the valve body; A negative pressure device, comprising a negative pressure driving member and a connecting pipe, wherein the inlet of the negative pressure driving member is connected to the suction interface through the connecting pipe to transfer the negative pressure generated by the negative pressure driving member to the valve chamber.

2. The electronic expansion valve according to claim 1, characterized in that: The suction interfaces include a plurality of suction interfaces, which are arranged at intervals, and the number of the connecting pipes corresponds one to one to the number of the suction interfaces.

3. The electronic expansion valve according to claim 2, characterized in that: The plurality of suction interfaces include a first interface and a second interface. The number of the fluid interfaces is two and they are a fluid inlet and a fluid outlet respectively. The first interface is arranged close to and toward the fluid inlet, and the second interface is arranged close to and toward the fluid outlet.

4. The electronic expansion valve according to claim 1, characterized in that: Also includes: A one-way valve is connected in series between the inlet of the negative pressure driving member and the suction interface, and the one-way valve is configured to only allow the fluid to flow from the valve cavity toward the inlet of the negative pressure driving member in one direction.

5. The electronic expansion valve according to any one of claims 1 to 4, characterized in that: Also includes: A filter element is disposed in the valve cavity and is suitable for covering an end of the fluid interface facing the valve cavity.

6. The electronic expansion valve according to claim 5, characterized in that: Also includes: A first motor is connected to the filter element and is used to drive the filter element to move so as to adjust the opening of the fluid interface.

7. The electronic expansion valve according to claim 6, characterized in that: The filter element is movable in a plane perpendicular to the axis of the fluid port.

8. The electronic expansion valve according to claim 7, characterized in that: Also includes: A guide rail extends along the moving direction of the filter element. The guide rails are two in number and are respectively arranged on two opposite sides of the filter element. Two ends of the filter element perpendicular to the moving direction are respectively slidably matched with the two guide rails.

9. The electronic expansion valve according to claim 7, characterized in that: A screw mechanism is connected between the first motor and the filter element.

10. The electronic expansion valve according to claim 5, characterized in that: The filter element is disposed on both the fluid inlet and the fluid outlet.

11. The electronic expansion valve according to claim 1, characterized in that: The negative pressure device further comprises a shell, a negative pressure chamber is defined in the shell, and the negative pressure driving member is arranged in the negative pressure chamber.

12. An air conditioning system, characterized in that: It comprises an electronic expansion valve according to any one of claims 1-11.

13. A vehicle, characterized in that: include: The air conditioning system of claim 12.

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