Condenser assembly, thermal management system and electric vehicle

Abstract

This application provides a condenser assembly, a thermal management system, and an electric vehicle, which reduce or avoid noise generated during operation through structural improvements. The condenser assembly includes a condenser body and a condenser inlet pipe. The condenser body includes a first liquid collection pipe extending along a first direction. The condenser inlet pipe includes an inlet pipe connection portion for connecting to the first liquid collection pipe. The inlet pipe connection portion is connected to the first liquid collection pipe in the first direction, and the rate of change of the cross-sectional area of ​​the inlet pipe connection portion conforms to a set threshold range, which includes less than or equal to 10%. This reduces or avoids noise generated by the condenser assembly during operation.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for electric vehicles, specifically to a condenser assembly, a thermal management system, and an electric vehicle. Background Technology

[0002] In electric vehicles, the condenser assembly is connected to the compressor, forming a highly efficient heat exchange circuit. The condenser assembly transfers heat released by the medium to the air through heat exchange with the ambient air, and the heated air is then supplied to the passenger compartment. However, in actual use, the condenser assembly in electric vehicles suffers from the drawback of high noise levels. Utility Model Content

[0003] The purpose of this application is to provide a condenser assembly, a thermal management system, and an electric vehicle. By improving the structure of the condenser assembly, noise reduction of the condenser assembly is achieved, thereby improving the passenger riding experience.

[0004] To solve the above-mentioned technical problems, this application provides a condenser assembly for an electric vehicle. The condenser assembly includes a condenser body and a condenser inlet pipe. The condenser body includes a first liquid collection pipe extending in a first direction. The condenser inlet pipe includes an inlet pipe connection portion for connecting with the first liquid collection pipe. The inlet pipe connection portion is connected with the first liquid collection pipe in the first direction. The cross-sectional area gradient of the inlet pipe connection portion conforms to a set threshold range, which includes: less than or equal to 10%.

[0005] The cross-sectional area gradient of the inlet pipe connection meets the set threshold range, which can reduce or avoid local turbulence caused by drastic changes in cross-sectional area of ​​the medium, reduce pressure fluctuations of the medium entering the first liquid collection pipe, reduce or avoid noise generated by the condenser assembly during operation, and improve the passenger riding experience.

[0006] Optionally, the threshold range can be set to less than or equal to 5% ± 0.5.

[0007] Optionally, the inlet pipe connection has a maximum cross-section and a minimum cross-section in the height direction;

[0008] The percentage of the ratio of the difference between the areas of the maximum and minimum cross sections to the minimum cross section is used as the cross-sectional area gradient rate of the inlet pipe connection.

[0009] Optionally, the locations of the maximum and minimum cross sections are distributed along the flow direction of the medium, with the location of the maximum cross section located between the first liquid collection pipe and the location of the minimum cross section.

[0010] Optionally, the direction perpendicular to the first direction and the height direction of the condenser body is defined as the second direction; the cross-section of the first liquid collecting pipe in the height direction is elliptical or flattened elliptical, the major axis of the first liquid collecting pipe coincides with the height direction, and the minor axis of the first liquid collecting pipe coincides with the second direction.

[0011] Optionally, the cross-section of the inlet pipe connection in the height direction conforms to the cross-section of the first liquid collecting pipe in the height direction.

[0012] Optionally, a portion of the condenser inlet pipe is bent to form a bend, the bend extending in the same direction as the first liquid collecting pipe; the inlet pipe connection portion constitutes part of the bend; or

[0013] The inlet pipe connection is opposite to the bent section.

[0014] Optionally, the bent segment is circular, elliptical, or flattened elliptical.

[0015] Optionally, it also includes an adapter, which is provided with a first adapter channel, wherein the inlet pipe connection portion and the portion of the first liquid collecting pipe are both located within the first adapter channel.

[0016] A thermal management system for an electric vehicle includes the aforementioned condenser assembly. By employing this thermal management system for the electric vehicle, noise from the thermal management system can be reduced or avoided.

[0017] An electric vehicle includes the aforementioned thermal management system. By employing an electric vehicle with this thermal management system, the noise of the electric vehicle's thermal management system can be reduced or avoided, thereby improving the user experience. Attached Figure Description

[0018] Figure 1 This is a structural diagram and isometric view of the condenser assembly in this utility model.

[0019] Figure 2 for Figure 1 The front view;

[0020] Figure 3 for Figure 2 A partial structural diagram showing the condenser inlet;

[0021] Figure 4 for Figure 1 Enlarged schematic diagram of part of the structure;

[0022] Figure 5 This is a front view of a condenser assembly in the prior art.

[0023] in, Figures 1-5 The accompanying figure labels are as follows:

[0024] 110a - Condenser inlet; 120 - Second liquid collecting pipe; 130 - Bottom connecting pipe; 140 - Fin; 200 - Condenser inlet pipe; 201 - Bending section; 201a - Inlet pipe connection; 201a-1 - Inlet pipe outlet section; 300 - Condenser outlet pipe; 301 - Outlet pipe connection; 400 - Adapter; 401 - First adapter channel; 402 - Second adapter channel; 1 - Necked structure. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Electric vehicles have a thermal management system, which includes a condenser assembly directly connected to the compressor. The condenser assembly exchanges heat with the air, raising its temperature before supplying it to the passenger compartment. During the operation of the thermal management system, the compressed medium from the compressor is discharged from the compressor exhaust pipe into the condenser inlet pipe 200 and then into the liquid collection pipe of the condenser body 100. When the high-speed gaseous medium flows through the condenser body 100, a noticeable high-frequency noise of 2500Hz-9000Hz is generated in the passenger compartment.

[0027] When the condenser inlet pipe 200 is connected to the manifold, a portion of the condenser inlet pipe 200 is typically constructed as a sharply constricted structure 1. For example... Figure 5 As shown, Figure 5 This is a front view of a condenser assembly in the relevant art.

[0028] A sharp necking structure 1 typically refers to a region in the pipeline where the diameter decreases rapidly to reduce the pipe diameter. The cross-sectional area of ​​the inlet pipe outlet section 201a-1, which is used to connect with the manifold, has a gradient of 55.4%, thus forming this sharp necking structure.

[0029] The abruptly constricted structure 1 of the condenser inlet pipe 200 causes a sudden acceleration of the gaseous medium, generating a large velocity gradient. The high-speed gaseous medium exhibits altered flow characteristics at the interface with its drastically changing cross-sectional area, inducing localized turbulence and generating strong pressure fluctuations, which in turn exacerbate vibration and noise. In reality, the non-uniform, high-flow-rate, high-speed gaseous medium in the condenser body 100 creates a large velocity gradient, generating low-to-mid-frequency noise (20Hz-2000Hz) and high-frequency noise (2500Hz-9000Hz), which propagates into the passenger cabin through the airflow path.

[0030] This application provides a condenser assembly that, by improving the structure of the condenser assembly, reduces or avoids the noise generated during its operation, thereby improving the passenger riding experience.

[0031] like Figures 1 to 4 As shown, Figure 1 This is a structural diagram and isometric view of the condenser assembly in this utility model. Figure 2 for Figure 1 The front view. Figure 3 for Figure 2 A partial structural diagram showing the condenser inlet 110a. Figure 4 for Figure 1 A magnified schematic diagram of part of the structure.

[0032] The condenser assembly includes a condenser body 100 and a condenser inlet pipe 200. The condenser body 100 includes a first liquid collecting pipe 110 extending along a first direction, forming a first liquid collecting chamber 111. The condenser inlet pipe 200 includes an inlet pipe connection portion 201a for connecting with the first liquid collecting pipe 110. The inlet pipe connection portion 201a is connected with the first liquid collecting pipe 110 in the first direction. The rate of change of the cross-sectional area of ​​the inlet pipe connection portion 201a conforms to a set threshold range, which includes less than or equal to 10%. The first direction is the extending direction of the first liquid collecting chamber 111.

[0033] The inlet pipe connection 201a includes a maximum cross-section and a minimum cross-section in the vehicle height direction. Several height-direction cross-sections are formed in the inlet pipe connection 201a along the vehicle height direction, with each cross-section gradually transitioning along the medium flow direction. The cross-sectional area with the largest cross-sectional area is selected as the maximum cross-section, and the cross-sectional area with the smallest cross-sectional area is selected as the minimum cross-section.

[0034] The percentage of the ratio of the difference between the areas of the maximum and minimum cross-sections to the minimum cross-section is used as the cross-sectional area gradient rate of the inlet pipe connection 201a. That is, in the technical solution of this application, the cross-sectional area gradient rate of the inlet pipe connection 201a = (maximum cross-sectional area - lowest cross-sectional area) / minimum cross-sectional area * 100%.

[0035] The dimension in the height direction is referenced to the height direction of the condenser body 100 in the figure. Specifically, the condenser body 100 also includes a plurality of fins 140 extending along the height direction. The fins 140 are connected to the first liquid collection chamber 111, and the direction in which the fins 140 extend is also the height direction of this application. At the same time, the height direction is also perpendicular to the plane containing the first direction and the second direction described below.

[0036] The technical solution of this application controls the rate of change of the cross-sectional area of ​​the inlet pipe connection 201a to less than or equal to 10%, which can reduce or avoid the local turbulence caused by the drastic change in the cross-sectional area of ​​the inlet pipe connection 201a, reduce the pressure fluctuation of the medium entering the first liquid collection pipe, reduce or avoid the noise generated by the condenser assembly during operation, and improve the passenger riding experience.

[0037] In other implementations, the threshold range may also include: less than or equal to 5% ± 0.5.

[0038] In this way, the area of ​​the cross-section in the height direction of the inlet pipe connection 201a remains roughly the same, thereby achieving a better noise reduction effect.

[0039] The locations of the maximum and minimum cross-sections are distributed along the flow direction of the medium, with the maximum cross-section located between the first collecting pipe and the minimum cross-section. The maximum cross-section is located at the portion where the inlet pipe connection 201a connects to the first collecting pipe 110, while the minimum cross-section is further away from the first collecting pipe 110 compared to the maximum cross-section. Alternatively, the minimum cross-section can be located at the portion connected to the first collecting pipe 110, while the maximum cross-section is further away from the first collecting pipe 110 compared to the minimum cross-section.

[0040] The following is an appendix Figures 1 to 4 The technical solution of this application will be further explained using an example.

[0041] The cross-section of the first liquid collecting pipe 110 in the height direction can be circular, oval, elliptical, or polygonal. The part of the inlet pipe connection 201a that is connected to the first liquid collecting pipe 110 can be similar in shape to the cross-section of the first liquid collecting pipe 110 in the height direction or different in shape from the cross-section of the first liquid collecting pipe 110 in the height direction. Those skilled in the art can choose for themselves.

[0042] The cross-section of the first liquid collecting pipe 110 in the height direction is elliptical or flattened elliptical. That is, the dimension of the first liquid collecting pipe 110 in the height direction is larger than the dimension of the first liquid collecting pipe 110 in the second direction shown in the figure. (As shown in the figure...) Figure 1 , Figure 2 and Figure 3 In the example shown, the direction perpendicular to the height of the condenser body 100 within the same plane is defined as the second direction.

[0043] When the condenser assembly is installed in the electric vehicle described below, the dimension of the first liquid collecting chamber 111 in the second direction is limited by the size of its installation space. By adopting the structure of the first liquid collecting pipe 110 in this embodiment, the dimension of the first liquid collecting chamber 111 in the height direction is no longer limited by its installation dimension in the second direction. The dimension of the first liquid collecting chamber 111 in the height direction is larger than its dimension in the second direction, utilizing the space of the installation space in the height direction and increasing the cross-sectional area of ​​the first liquid collecting chamber 111.

[0044] In a more specific example, the difference between the dimension of the first liquid collection chamber 111 in the height direction and its dimension in the second direction is 6 mm. The dimension in the second direction is limited by the dimension of the installation space of the condenser body 100 in the second direction, and is a constant value. Of course, the difference between the dimension of the first liquid collection chamber 111 in the height direction and its dimension in the second direction can also be larger, greater than 6 mm, or smaller, less than 6 mm, as long as it can increase the flow rate of the first liquid collection chamber 111 and improve the heating speed.

[0045] like Figure 1 and Figure 3 As shown, the first liquid collecting pipe 110 has a flattened elliptical cross-section in the height direction. The major axis of the first liquid collecting pipe 110 coincides with the height direction, and the minor axis of the first liquid collecting pipe 110 coincides with the second direction. By adopting a flattened elliptical cross-section for the first liquid collecting pipe 110, the space in the height direction can be utilized to the maximum extent, thereby making the cross-sectional area of ​​the first liquid collecting cavity 111 nearly consistent with the cross-sectional area of ​​the condenser inlet pipe 200, while also facilitating processing.

[0046] The inlet pipe connection 201a can conform to the first liquid collecting pipe 110. For example... Figure 3 As shown, the dimension of the cross-section of the inlet pipe connection 201a in the height direction is also larger than its dimension in the second direction. This allows the maximum cross-section of the inlet pipe connection 201 to conform to the shape of the first liquid collecting pipe 110, so that the area of ​​the cross-section of the portion of the inlet pipe connection 201 that is in contact with the first liquid collecting chamber 110 can be matched with the area of ​​the first liquid collecting pipe 110 to the maximum extent.

[0047] It is understood that in this embodiment, as long as the dimension of the first liquid collection cavity 111 in the height direction is greater than its dimension in the second direction, it is acceptable. In addition to adopting an elliptical structure, it can also adopt a rectangular, trapezoidal or other irregular shape. Those skilled in the art can choose according to their needs. Shapes that are the same as or similar to the above shapes are all within the protection scope of this patent.

[0048] In some other technical solutions of this application, a portion of the condenser inlet pipe 200 is bent to form a bent section 201. For example... Figure 1 and Figure 2 As shown, the bent section 201 extends in the same direction as the first liquid collecting pipe 110, that is, the bent section 201 extends along the first direction, and the remaining parts are arranged at right angles, acute angles or obtuse angles with the bent section 201. This method can improve the utilization of installation space and facilitate the connection between the condenser inlet pipe 200 and the first liquid collecting pipe 110.

[0049] In one example, the inlet pipe connection 201a is located in the bend section 201. That is, the inlet pipe connection 201a is provided in the bend section 201. In this example, the inlet pipe connection 201a and the bend section 201 are integrally machined. The condenser inlet pipe 200 can be of conventional size and structure, but when it is connected to the first liquid collecting pipe 110, the bend section 201 of the condenser inlet pipe 200 is reprocessed to form the inlet pipe connection 201a.

[0050] Specifically, the portion of the bent section 201, except for the part with the inlet pipe connection 201a, has a circular or flattened elliptical cross-section in the height direction, while the inlet pipe connection 201a has a flattened elliptical cross-section in the height direction. This avoids the shrinkage of the remaining portion of the circular bent section 201 in the second direction, ensuring that the overall cross-sectional area of ​​the bent section 201 remains unchanged. This allows it to adapt to the shape of the first liquid collection chamber 111 and also reduces or avoids noise generation.

[0051] In another example, the inlet pipe connector 210a is aligned with the bent section 201 to achieve alignment with the first liquid collecting pipe 110. When aligned with the bent section 201, the inlet pipe connector 201a has a minimum cross-section of circular to adapt to the bent section 201, and a maximum cross-section of flattened oval to mate with the first liquid collecting pipe 110. In this case, the inlet pipe connector 201a functions as an adapter.

[0052] The condenser body 100 may also include a second liquid collection pipe 120, which is connected to the compressor inlet. The structure of the second liquid collection pipe 120 is consistent with that of the first liquid collection pipe 110.

[0053] The condenser body 100 also includes the aforementioned sets of fins 140 and a bottom connecting pipe 130. The first liquid collecting pipe 110 and the second liquid collecting pipe 120 are arranged opposite to the bottom connecting pipe 130 in the height direction, and a plurality of fins 140 are arranged between the first liquid collecting pipe 110 and the connecting groove. The first liquid collecting pipe 110 and the second liquid collecting pipe 120 are connected through corresponding fins 140 and the bottom connecting pipe 130. In this way, the length of the medium flow path in the condenser body 100 can be increased.

[0054] The condenser assembly may also include a condenser outlet pipe 300 for connecting the second liquid collector 120 to the compressor inlet. The condenser outlet pipe 300 includes an outlet pipe connector 301 that abuts the end of the second liquid collector 120 in a first direction, and the outlet pipe connector 301 is conformal to the second liquid collector 120.

[0055] The structures of the outlet pipe connection 301 and the inlet pipe connection 201a are identical. In this embodiment, the outlet pipe connection 301 is an integral structure formed by reprocessing the condenser outlet pipe 300, and its processing method can refer to the aforementioned processing method for the condenser inlet pipe 200.

[0056] The condenser body 100 may further include an adapter 400, which has a first adapter channel portion 401 and a second adapter channel portion 402 that are isolated from each other. The inlet pipe connection portion 201a and the first liquid collecting pipe 110 are both inserted into the first adapter channel portion 401 at their ends in the first direction. The outlet pipe connection portion 301 and the second liquid collecting pipe 120 are both inserted into the second adapter channel portion 402 at their ends in the first direction. In this way, the condenser inlet pipe 200 and the condenser outlet pipe 300 can be connected by an adapter 400, simplifying the structure of the condenser body 100.

[0057] This application also provides a thermal management system for an electric vehicle, including the aforementioned condenser assembly. By employing the condenser assembly of this application, the noise generated by the thermal management system of the electric vehicle can be effectively reduced or avoided.

[0058] This application also provides an electric vehicle including the aforementioned thermal management system. By employing the condenser assembly of this application, noise reduction in the electric vehicle can be effectively achieved.

[0059] The advantages of this application are:

[0060] First, the gradient rate of the cross-sectional area of ​​the inlet pipe connection 201a is significantly reduced. This avoids sudden acceleration of the medium when entering the first liquid collection chamber 111, preventing a large velocity gradient. Furthermore, it also avoids the generation of local turbulence and reduces or eliminates pressure fluctuations. This significantly improves or avoids low-to-mid-frequency noise (20-2000Hz) and high-frequency noise (2500-9000Hz) of the condenser assembly.

[0061] Secondly, by adopting the technical solution of this application, the flow rate requirement of the condenser inlet pipe 200 can also be guaranteed, thus ensuring the need for rapid heating of the passenger cabin.

[0062] Third, the technical solution of this application can also meet the installation space requirements of the condenser body 100.

[0063] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A condenser assembly for an electric vehicle, characterized in that, It includes a condenser body (100) and a condenser inlet pipe (200), wherein the condenser body (100) includes a first liquid collecting pipe (110) extending in a first direction; The condenser inlet pipe (200) includes an inlet pipe connection portion (201a) for connecting to the first liquid collection pipe (110) along the first direction. The cross-sectional area gradient of the inlet pipe connection portion (201a) conforms to a set threshold range, which includes: less than or equal to 10%.

2. The condenser assembly for an electric vehicle according to claim 1, characterized in that, The set threshold range includes: less than or equal to 5% ± 0.

5.

3. The condenser assembly for an electric vehicle according to claim 1, characterized in that, The inlet pipe connection (201a) has a maximum cross-section and a minimum cross-section in the height direction; The percentage of the area difference between the maximum and minimum cross sections to the area ratio of the minimum cross section is used as the cross-sectional area gradient rate of the inlet pipe connection (201a).

4. The condenser assembly for an electric vehicle according to claim 3, characterized in that, The locations of the maximum cross-section and the minimum cross-section are distributed along the flow direction of the medium, with the location of the maximum cross-section located between the first liquid collection pipe (110) and the location of the minimum cross-section.

5. The condenser assembly for an electric vehicle according to claim 1, characterized in that, The direction perpendicular to the first direction and the height direction of the condenser body (100) is defined as the second direction; the cross-section of the first liquid collecting pipe (110) in the height direction is elliptical or flat elliptical, the major axis direction of the first liquid collecting pipe (110) coincides with the height direction, and the minor axis direction of the first liquid collecting pipe (110) coincides with the second direction.

6. The condenser assembly for an electric vehicle according to claim 5, characterized in that, The cross-section of the inlet pipe connection (201a) in the height direction is similar to the cross-section of the first liquid collecting pipe (110) in the height direction.

7. The condenser assembly for an electric vehicle according to claim 5, characterized in that, The condenser inlet pipe (200) is partially bent to form a bent section (201), which extends in the same direction as the first liquid collecting pipe (110); the inlet pipe connection (201a) constitutes part of the bent section (201); or The inlet pipe connector (201a) is connected to the bent section (201).

8. The condenser assembly for an electric vehicle according to claim 7, characterized in that, The bending section (201) is circular, elliptical, or flat elliptical.

9. The condenser assembly for an electric vehicle according to claim 8, characterized in that, It also includes an adapter (400) having a first adapter channel (401) in which the inlet pipe connection (201a) and the first liquid collection pipe (110) are located within the first adapter channel (401).

10. A thermal management system, characterized in that, Includes the condenser assembly as described in any one of claims 1-9.

11. An electric vehicle, characterized in that, Includes the thermal management system as described in claim 10.

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