Blower structure and vehicle air conditioning system

Abstract

The application relates to the technical field of vehicles, in particular to a blower structure and a vehicle air conditioning system. The blower structure comprises: a volute, the volute comprising a mounting cavity and a diffuser cavity which are communicated with each other; an impeller, the impeller being arranged in the mounting cavity; and a noise reduction assembly, the noise reduction assembly being arranged in the diffuser cavity. The noise reduction assembly separates the diffuser cavity into a noise reduction cavity and an airflow cavity in the volute, and the airflow cavity is communicated with the mounting cavity. The blower structure provided by the application is provided with the noise reduction assembly in the volute, the structure of the diffuser cavity of the volute is optimized, the noise reduction cavity is separated in the volute by the noise reduction assembly, the noise reduction cavity can effectively attenuate noise when the airflow flows through the airflow cavity, the noise characteristics of the product are improved, and the user comfort is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a blower structure and an automotive air conditioning system. Background Technology

[0002] Currently, during the operation of automotive air conditioning, air is drawn by the blower, collected and guided by the volute, enters the diffuser chamber, then enters the air conditioning distribution box, and finally is delivered into the vehicle through the ductwork. For new energy vehicles, air conditioning noise is a major noise source. As users' demands for vehicle comfort continue to increase, the noise problem of automotive air conditioning systems is becoming increasingly important. The main noise source of the air conditioning box is on the blower side, and its noise propagates into the vehicle through the diffuser chamber of the volute. Existing automotive air conditioning boxes typically reduce noise to some extent by reducing the resistance of the air conditioning box and increasing the impeller diameter. However, due to the performance requirements of the air conditioning box, it is difficult to reduce the resistance, and the impeller diameter cannot be too large due to the space constraints of the vehicle, so the noise reduction effect is generally limited. Utility Model Content

[0003] The purpose of this application is to provide a blower structure and an automotive air conditioning system, so as to solve to a certain extent the technical problems of the limited noise reduction capability and general noise reduction effect of existing automotive air conditioning systems.

[0004] This application provides a blower structure, including:

[0005] A volute, the volute comprising an interconnected mounting cavity and a diffuser cavity;

[0006] An impeller is disposed in the mounting cavity;

[0007] A noise reduction component, wherein the noise reduction component is disposed in the diffuser cavity;

[0008] The noise reduction component separates the diffuser cavity into a noise reduction cavity and an airflow cavity within the volute, and the airflow cavity is connected to the mounting cavity.

[0009] In the above technical solution, the noise reduction component further includes:

[0010] A first noise reduction plate, the edge of which is connected to the inner wall of the volute.

[0011] The second noise reduction plate has its edge connected to the inner wall of the volute, and the second noise reduction plate and the first noise reduction plate are arranged facing each other.

[0012] The first noise reduction plate and the second noise reduction plate are spaced apart, and the space between the first noise reduction plate and the second noise reduction plate is the airflow cavity.

[0013] In any of the above technical solutions, the noise reduction cavity further includes a first noise reduction cavity and a second noise reduction cavity. The space between the side surface of the first noise reduction plate away from the second noise reduction plate and the inner wall surface of the volute forms the first noise reduction cavity, and the space between the side surface of the second noise reduction plate away from the first noise reduction plate and the inner wall surface of the volute forms the second noise reduction cavity.

[0014] In any of the above technical solutions, the first noise reduction board is further provided with a plurality of first perforations, and the plurality of first perforations are distributed in a matrix on the first noise reduction board;

[0015] The second noise reduction board has multiple second perforations, which are distributed in a matrix on the second noise reduction board.

[0016] In any of the above technical solutions, the edge of the first noise reduction plate is provided with a first fixing part, which is used to connect with the volute.

[0017] The edge of the second noise reduction plate is provided with a second fixing part, which is used to connect with the volute.

[0018] In any of the above technical solutions, the volute further comprises:

[0019] First snail shell;

[0020] The second volute is interlocked and connected to the first volute.

[0021] The length of the first noise reduction plate extends along the length direction of the airflow cavity, one side of the first noise reduction plate is connected to the first volute, and the other side of the first noise reduction plate is connected to the second volute.

[0022] The second noise reduction plate extends along the length of the airflow cavity, one side of the second noise reduction plate is connected to the first volute, and the other side of the second noise reduction plate is connected to the second volute.

[0023] In any of the above technical solutions, the volute is further provided with an air inlet and an air outlet, the air inlet is connected to the mounting cavity, and the air outlet is formed at the end of the volute away from the mounting cavity;

[0024] One end of the first noise reduction plate extends to the junction of the mounting cavity and the diffuser cavity, and the other end of the first noise reduction plate extends toward the air outlet.

[0025] One end of the second noise reduction plate extends to the junction of the mounting cavity and the diffuser cavity, and the other end of the second noise reduction plate extends toward the air outlet.

[0026] In any of the above technical solutions, the first noise reduction plate is further defined as an arc-shaped plate, with a portion of the first noise reduction plate arching towards the direction of the second noise reduction plate.

[0027] In any of the above technical solutions, the second noise reduction plate further includes a first arc segment and a second arc segment, wherein the first arc segment and the second arc segment are arranged sequentially along the airflow direction;

[0028] The first arc segment partially arches away from the first noise reduction plate, while the second arc segment partially arches towards the first noise reduction plate.

[0029] This application also provides an automotive air conditioning system, including the blower structure described in any of the above technical solutions, and thus possesses all the beneficial technical effects of the blower structure, which will not be repeated here.

[0030] Compared with the prior art, the beneficial effects of this application are as follows:

[0031] The blower structure provided in this application includes: a volute, which includes an installation cavity and a diffuser cavity that are interconnected; an impeller, which is disposed in the installation cavity; and a noise reduction component, which is disposed in the diffuser cavity. The noise reduction component separates the diffuser cavity into a noise reduction cavity and an airflow cavity within the volute, and the airflow cavity is connected to the installation cavity.

[0032] The blower structure provided in this application has a noise reduction component installed inside the volute, which optimizes the structure of the diffuser chamber of the volute. The noise reduction component separates a noise reduction chamber inside the volute. When the airflow flows through the airflow chamber, the noise reduction chamber can effectively attenuate the noise, improve the noise characteristics of the product, and enhance user comfort.

[0033] The vehicle air conditioning system provided in this application includes the blower structure described above. Therefore, the blower structure can effectively reduce the impeller aerodynamic noise generated during the operation of the vehicle air conditioning system, reduce the impact on users, and improve comfort. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the blower structure provided in the embodiments of this application;

[0036] Figure 2This is a partial structural diagram of the blower structure provided in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the first noise reduction plate structure of the blower structure provided in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the second noise reduction plate structure of the blower structure provided in the embodiments of this application.

[0039] Figure label:

[0040] 1-First volute, 2-Second volute, 3-First noise reduction plate, 301-First side, 302-Second side, 303-Third side, 304-Fourth side, 305-First fixing part, 4-Second noise reduction plate, 401-Fifth side, 402-Sixth side, 403-Seventh side, 404-Eighth side, 405-Second fixing part, 5-First perforation, 6-Second perforation, 7-Air outlet, 8-Impeller, 9-Mounting cavity, 10-Diffuser cavity. Detailed Implementation

[0041] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0042] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0043] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] The following reference Figures 1 to 4 This application describes the blower structure and automotive air conditioning system according to embodiments of the present application.

[0047] See Figures 1 to 4 As shown, an embodiment of this application provides a blower structure, which includes a volute, an impeller 8, and a noise reduction component. The volute has an internal mounting cavity 9 and a diffuser cavity 10, which are connected. The impeller 8 is disposed within the mounting cavity 9, and the noise reduction component is disposed within the diffuser cavity 10. The noise reduction component separates the internal space of the diffuser cavity 10 into a noise reduction cavity and an airflow cavity, with the airflow cavity connected to the mounting cavity 9. When the impeller 8 rotates, airflow is generated within the volute. The airflow flows through the mounting cavity 9 to the airflow cavity and finally exits the blower structure. The noise reduction cavity formed between the noise reduction component and the volute is spaced apart from the airflow cavity, so that when the airflow passes through the airflow cavity, the resonant frequency of the airflow cavity is changed by the noise reduction cavity, thereby achieving noise reduction and sound attenuation.

[0048] Specifically, the volute includes a first volute 1 and a second volute 2 that are interlocked and adapted to each other. After the first volute 1 and the second volute 2 are interconnected, they jointly define an interconnected mounting cavity 9 and a diffuser cavity 10. An air inlet is formed on the side wall of the volute corresponding to the mounting cavity 9, and an air outlet 7 is formed at the end of the volute away from the mounting cavity 9.

[0049] Furthermore, the noise reduction assembly includes a first noise reduction plate 3 and a second noise reduction plate 4, which face each other and are spaced apart, forming an airflow cavity between them. The first noise reduction plate 3 is a quadrilateral plate, including a first side 301, a second side 302, a third side 303, and a fourth side 304 arranged sequentially. The first side 301 extends towards the mounting cavity 9 and connects to the inner wall of the volute at the junction of the mounting cavity 9 and the diffuser cavity 10. The second side 302 extends towards the air outlet 7 and connects to the inner wall of the volute. The third side 303 connects to the inner wall of the first volute 1, and the fourth side 304 connects to the inner wall of the second volute 2.

[0050] Preferably, at least the first side 301 and the second side 302 of the four sides of the first noise reduction plate 3 extend outward to form a first fixing part 305. The two first fixing parts 305 are respectively attached to and connected to the inner wall surface of the volute. The connection method can be, but is not limited to, welding, to strengthen the connection strength between the first noise reduction plate 3 and the volute.

[0051] In this embodiment, there are two noise reduction cavities, namely a first noise reduction cavity and a second noise reduction cavity. The first noise reduction cavity is formed between the first noise reduction plate 3 and the volute. The second noise reduction plate 4 is also a quadrilateral plate, including a fifth side 401, a sixth side 402, a seventh side 403, and an eighth side 404 connected end to end. The fifth side 401 extends toward the mounting cavity 9 and connects with the inner wall of the volute at the junction of the mounting cavity 9 and the diffuser cavity 10. The fifth side 401 of the second noise reduction plate 4 is spaced apart from the first side 301 of the first noise reduction plate 3. The sixth side 402 extends toward the air outlet 7 and connects with the inner wall of the volute. The sixth side 402 of the second noise reduction plate 4 is spaced apart from the second side 302 of the first noise reduction plate 3. The seventh side 403 is connected to the inner wall of the first volute 1, and the eighth side 404 is connected to the inner wall of the second volute 2. The second noise reduction cavity is formed between the second noise reduction plate 4 and the volute.

[0052] Preferably, at least the fifth side 401 of the four sides of the second noise reduction plate 4 is provided with a second fixing part 405. The second fixing part 405 is attached to and connected to the inner wall surface of the volute. The connection method can be, but is not limited to, welding, to enhance the connection strength between the second noise reduction plate 4 and the volute.

[0053] Preferably, the first noise reduction plate 3 is an arc-shaped plate, and the middle section of the first noise reduction plate 3 arches towards the second noise reduction plate 4, so that the thickness of the first noise reduction cavity formed between the rear of the first noise reduction plate 3 and the first volute 1 gradually changes along the airflow direction, thereby changing the resonance frequency of the airflow process and thus enhancing the noise reduction and sound absorption effect.

[0054] Preferably, in this embodiment, the connection positions of the first fixing part 305 and the second fixing part 405 with the volute can be adjusted according to the different flow fields at the air outlet 7, thereby adjusting the streamline of the airflow cavity, reducing noise while improving the internal flow field and enhancing the performance of the blower structure.

[0055] The second noise reduction plate 4 is also an arc-shaped plate, and the second noise reduction plate 4 includes a first arc-shaped segment and a second arc-shaped segment distributed along the airflow direction. The first arc-shaped segment is closer to the mounting cavity 9 than the second arc-shaped segment, and the second arc-shaped segment is closer to the air outlet 7 than the first arc-shaped segment. The middle part of the first arc-shaped segment arches away from the first noise reduction plate 3, and the second arc-shaped segment arches towards the first noise reduction plate 3, so that the distance between the second noise reduction plate 4 and the first noise reduction plate 3 gradually changes, thereby making the width (or thickness) of the airflow cavity gradually change. The thickness of the second noise reduction cavity between the rear of the second noise reduction plate 4 and the second volute 2 also gradually changes along the airflow direction.

[0056] Furthermore, the first noise reduction plate 3 has multiple first perforations 5, which are evenly distributed in a matrix on the first noise reduction plate 3. The first noise reduction plate 3 with multiple first perforations 5 can turbulentize the airflow. Since a first noise reduction cavity is formed behind the first noise reduction plate 3, the first noise reduction cavity, the first noise reduction plate 3, and part of the shell of the first volute 1 can form a micro-perforated resonant cavity. Correspondingly, the second noise reduction plate 4 has multiple second perforations 6, which are evenly distributed in a matrix on the second noise reduction plate 4. The second noise reduction plate 4 with multiple second perforations 6 can turbulentize the airflow. A second noise reduction cavity is formed behind the second noise reduction plate 4. The second noise reduction cavity, the second noise reduction plate 4, and part of the shell of the second volute 2 can form a micro-perforated resonant cavity. When the airflow flows through the first noise reduction plate 3 and the second noise reduction plate 4, the two micro-perforated resonant cavities can change the resonant frequency of the airflow during the airflow process, thereby achieving the effect of noise reduction and sound attenuation.

[0057] Preferably, in this embodiment, the perforation rate P of the first noise reduction plate 3 and the second noise reduction plate 4 is 3%, the thickness of the first noise reduction plate 3 is t = 0.5 mm, the diameter of the first perforation 5 is d = 1 mm, and the noise reduction frequency is calculated at a position with a local thickness of 10 mm in the first noise reduction cavity behind the first noise reduction plate 3.

[0058] According to the formula: Le = t + 0.8 · d, where:

[0059] fr Resonance silencing frequency (Hz);

[0060] C is the speed of sound in air (m / s);

[0061] P is the perforation rate of the first noise reduction plate 3;

[0062] D is the thickness (m) of the cavity behind the first noise reduction plate 3;

[0063] The effective thickness of the perforated plate Le; the calculation method for the silencing frequency of the second noise reduction plate 4 is similar.

[0064] Calculations show that, based on the above data, the sound velocity at room temperature is 341 m / s, and the resonant absorption frequency fr is around 2500 Hz. In other words, under this set of data, the blower structure provided in this application can absorb high-frequency noise with a main frequency of around 2500 Hz. It should be noted that this set of data is only one specific example and does not mean that the thickness and perforation rate of the first noise reduction plate 3 and the second noise reduction plate 4 in this application are limited to the above one case.

[0065] In summary, the blower structure provided in this application has a noise reduction component installed in the volute housing, which optimizes the structure of the diffuser chamber 10 of the volute housing. It has little impact on the structure of other parts of the blower and can be easily installed on existing compatible vehicle models. The noise reduction component separates a noise reduction chamber in the volute housing. When the airflow flows through the airflow chamber, the noise reduction chamber can effectively attenuate noise, improve the noise characteristics of the product, and enhance user comfort.

[0066] The embodiments of this application also provide an automotive air conditioning system, including the blower structure described in any of the above embodiments, and thus possess all the beneficial technical effects of the blower structure, which will not be repeated here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A blower structure, characterized in that, include: A volute, the volute comprising an interconnected mounting cavity and a diffuser cavity; An impeller is disposed in the mounting cavity; A noise reduction component, wherein the noise reduction component is disposed in the diffuser cavity; The noise reduction component separates the diffuser cavity into a noise reduction cavity and an airflow cavity within the volute, and the airflow cavity is connected to the mounting cavity.

2. The blower structure according to claim 1, characterized in that, The noise reduction component includes: A first noise reduction plate, the edge of which is connected to the inner wall of the volute. The second noise reduction plate has its edge connected to the inner wall of the volute, and the second noise reduction plate and the first noise reduction plate are arranged facing each other. The first noise reduction plate and the second noise reduction plate are spaced apart, and the space between the first noise reduction plate and the second noise reduction plate is the airflow cavity.

3. The blower structure according to claim 2, characterized in that, The noise reduction cavity includes a first noise reduction cavity and a second noise reduction cavity. The space between the surface of the first noise reduction plate facing away from the second noise reduction plate and the inner wall surface of the volute forms the first noise reduction cavity, and the space between the surface of the second noise reduction plate facing away from the first noise reduction plate and the inner wall surface of the volute forms the second noise reduction cavity.

4. The blower structure according to claim 2, characterized in that, The first noise reduction board has multiple first perforations, which are distributed in a matrix on the first noise reduction board. The second noise reduction board has multiple second perforations, which are distributed in a matrix on the second noise reduction board.

5. The blower structure according to claim 2, characterized in that, The first noise reduction plate has a first fixing part on its edge, which is used to connect with the volute. The edge of the second noise reduction plate is provided with a second fixing part, which is used to connect with the volute.

6. The blower structure according to claim 2, characterized in that, The volute includes: First snail shell; The second volute is interlocked and connected to the first volute. The length of the first noise reduction plate extends along the length direction of the airflow cavity, one side of the first noise reduction plate is connected to the first volute, and the other side of the first noise reduction plate is connected to the second volute. The second noise reduction plate extends along the length of the airflow cavity, one side of the second noise reduction plate is connected to the first volute, and the other side of the second noise reduction plate is connected to the second volute.

7. The blower structure according to claim 2, characterized in that, The volute is provided with an air inlet and an air outlet. The air inlet is connected to the mounting cavity, and the air outlet is formed at the end of the volute away from the mounting cavity. One end of the first noise reduction plate extends to the junction of the mounting cavity and the diffuser cavity, and the other end of the first noise reduction plate extends toward the air outlet. One end of the second noise reduction plate extends to the junction of the mounting cavity and the diffuser cavity, and the other end of the second noise reduction plate extends toward the air outlet.

8. The blower structure according to claim 5, characterized in that, The first noise reduction plate is an arc-shaped plate, and a portion of the first noise reduction plate arches towards the direction of the second noise reduction plate.

9. The blower structure according to claim 2, characterized in that, The second noise reduction plate includes a first arc segment and a second arc segment, which are arranged sequentially along the airflow direction; The first arc segment partially arches away from the first noise reduction plate, while the second arc segment partially arches towards the first noise reduction plate.

10. A vehicle air conditioning system, characterized in that, The blower structure includes any one of claims 1 to 9.

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