Silencing device, thermal management system and vehicle

Abstract

The embodiment of the utility model provides a silencer, a heat management system and a vehicle. The silencer comprises an exhaust pipe and a plurality of silencers, the exhaust pipe is used for communicating an exhaust port of the compressor with the air conditioner host, the silencers are provided with silencing cavities, the silencing cavities of the silencers are connected in series through the exhaust pipe, and at least one silencer is a reactive silencer. According to the silencing device, the heat management system and the vehicle, the multiple silencers including the at least one reactive silencer are arranged, so that the noise reduction capacity can be improved through superposition of the silencing effects of the multiple silencers, especially the noise reduction capacity for noise in the middle-low frequency band is improved, and in addition, the noise reduction effect of the multiple silencers is improved. The multiple silencers have high flexibility in the aspects of model selection, parameter setting and position arrangement, the possibility of optimization aiming at different use scenes can be provided, and therefore the adaptability of the silencing device to complex noise spectrums can be improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of vehicles, and in particular to a sound attenuation device, a thermal management system, and a vehicle. BACKGROUND

[0002] A compressor of a thermal management system generates high-pressure gas during operation, and noise is generated when the high-pressure gas is discharged. For example, in a vehicle, the noise generated when the compressor is running seriously affects the NVH performance of the vehicle, and therefore it is necessary to provide a sound attenuation device in the thermal management system to reduce noise. The sound attenuation devices provided in the related art have poor noise reduction capability. SUMMARY

[0003] Therefore, embodiments of the present application aim to provide a sound attenuation device with strong noise reduction capability and capable of adapting to complex noise spectrum, a thermal management system, and a vehicle.

[0004] A first aspect of embodiments of the present application provides a sound attenuation device, comprising: an exhaust pipe for connecting an exhaust port of a compressor and an air conditioner main unit; and a plurality of sound attenuators, each of which has a sound attenuation cavity, and the exhaust pipe connects the sound attenuation cavities of the sound attenuators in series, wherein at least one of the sound attenuators is a resistive sound attenuator.

[0005] In some embodiments, at least two of the sound attenuators are resistive sound attenuators, and the volumes of the sound attenuation cavities of the resistive sound attenuators are different; and / or at least one of the sound attenuators is a resistive sound attenuator.

[0006] In some embodiments, the exhaust pipe comprises a first flexible pipe section, and at least one of the first flexible pipe sections is arranged between each adjacent two of the sound attenuators.

[0007] In some embodiments, the diameter of the first flexible pipe section is 10-14 mm.

[0008] In some embodiments, the sound attenuation device comprises a counterweight, and at least one of the first flexible pipe sections is provided with at least one of the counterweights.

[0009] In some embodiments, along an exhaust direction of the exhaust pipe, one of the sound attenuators located at an upstream end is a first sound attenuator, the first sound attenuator comprises a body and a mounting bracket, the sound attenuation cavity is formed in the body, and the body is fastened and connected to the compressor through the mounting bracket.

[0010] In some embodiments, the body is a columnar structure, and an outer surface of the body forms an air inlet and an air outlet that are in communication with the sound attenuation cavity, the mounting bracket and the air outlet are arranged on the circumferential outer surface of the body, and the mounting bracket and the air outlet are arranged in a staggered manner along the circumference of the body.

[0011] In some embodiments, one of the mufflers located at the downstream end is a second muffler in the exhaust direction of the exhaust pipe, and the exhaust pipe comprises a second flexible pipe section arranged downstream of the second muffler in the exhaust direction.

[0012] A second aspect of the embodiments of the present application provides a heat management system, comprising a compressor, an air conditioner host, and the muffling device of the first aspect of the embodiments of the present application, wherein the exhaust pipe communicates the exhaust port of the compressor with the host.

[0013] A third aspect of the embodiments of the present application provides a vehicle comprising the muffling device of the second aspect of the embodiments of the present application, or the heat management system of the third aspect of the embodiments of the present application.

[0014] In the muffling device, the heat management system, and the vehicle of the embodiments of the present application, multiple mufflers including at least one resistive muffler are arranged, so that the noise reduction capability can be improved through the superposition of the muffling effects of the multiple mufflers, especially the noise reduction capability for the noise in the middle and low frequency bands. In addition, the multiple mufflers have high flexibility in selection, parameter setting, and position arrangement, which can provide the possibility of optimization for different use scenarios, thereby helping to improve the adaptability of the muffling device to complex noise spectrum. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic diagram of a muffling device according to an embodiment of the present application;

[0016] Figure 2 FIG. 2 is a structural schematic diagram of a heat management system according to an embodiment of the present application.

[0017] REFERENCE SIGNS

[0018] 100, muffling device; 1, exhaust pipe; 11, first flexible pipe section; 12, rigid pipe section; 13, second flexible pipe section; 2, muffler; 2a, muffling cavity; 21, first muffler; 211, body; 211a, air inlet; 211b, air outlet; 212, mounting bracket; 22, second muffler; 3, counterweight; 200, compressor; 300, air conditioner host. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0020] In the specific embodiments described in the various technical features, any suitable manner can be combined without contradiction, for example, different embodiments and technical solutions can be formed by combining different technical features. In order to avoid unnecessary repetition, various possible combinations of various technical features in this application are not described again.

[0021] In the following description, the terms "first, second, …" are only to distinguish different objects, and do not mean that the objects have the same or relationship. It should be understood that the orientation description "upper", "lower", "outer", "inner" is the orientation in the normal use state, and the "left" and "right" directions represent the left and right directions shown in the specific corresponding schematic diagram, which can be the left and right directions in the normal use state or not.

[0022] It should be noted that the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "includes one" does not exclude the presence of another identical element in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0023] Embodiments of the present application provide a silencing device, which is mainly used for noise reduction of noise caused by high pressure gas discharged by a compressor. In the following description, the silencing device will be mainly described by taking the example of the silencing device applied to the thermal management system (air conditioning system) of a vehicle, but those skilled in the art can understand that the silencing device can be applied to any thermal management system configured with a compressor and having a silencing requirement.

[0024] With reference to Figure 1 and Figure 2 , the silencing device 100 of the embodiments of the present application includes an exhaust pipe 1 and at least two silencers 2.

[0025] The exhaust pipe 1 is used to communicate the exhaust port of the compressor 200 with the air conditioning host 300, so as to transmit the high temperature and high pressure gas discharged by the compressor 200 to the air conditioning host 300. Here, the air conditioning host 300 specifically refers to a module integrated with an air outlet function in the thermal management system.

[0026] The silencer 2 has a silencing cavity 2a, and the exhaust pipe 1 connects the silencing cavities 2a of the silencers 2 in series. As an example, with reference to Figure 1The exhaust pipe 1 can include a plurality of pipe sections, and the outer surface of the muffler 2 can have an air inlet and an air outlet that are in communication with the sound attenuation cavity 2a, and the air inlet and the air outlet are respectively in communication with different pipe sections of the exhaust pipe 1, so that the exhaust pipe 1 realizes the series connection of the plurality of sound attenuation cavities 2a.

[0027] In Figure 1 In the embodiment shown, the sound attenuation device 100 includes two mufflers 2, but those skilled in the art can understand that the sound attenuation device 100 can also include more mufflers 2 according to actual use requirements.

[0028] Among the at least two mufflers 2 described above, at least one muffler 2 is a resistive muffler. The resistive muffler is also commonly referred to as a reflective muffler 2 in the art, which mainly utilizes the reflection superposition principle of sound waves to attenuate sound. As an example, the resistive muffler can be divided into a plurality of chambers, and the plurality of chambers are connected by pipes. The cross-sectional area (the area of the section perpendicular to the direction of gas flow) of adjacent chambers changes abruptly, so that some frequencies of sound waves are reflected back and forth in the chambers and cannot propagate to the next chamber, achieving the effect of noise reduction.

[0029] The at least two mufflers 2 described above can all be resistive mufflers. Alternatively, only a part of the mufflers 2 are resistive mufflers, and the other part of the mufflers 2 are other types of mufflers 2, such as resistive mufflers and impedance composite mufflers 2. The resistive muffler is a type of muffler 2 that converts sound waves into heat energy through friction and dissipates them, thereby achieving the purpose of sound attenuation. As an example, the sound attenuation cavity 2a of the resistive muffler can be formed by surrounding porous sound-absorbing materials, and / or the sound attenuation cavity 2a of the resistive muffler can be provided with sound-absorbing structures. The impedance composite muffler 2 is a type of muffler 2 that combines the relevant structures of resistive mufflers and resistive mufflers.

[0030] The sound attenuation device 100 in the related art usually only provides one muffler, while the sound attenuation device 100 in the embodiment provides at least two series-connected mufflers 2 including at least one resistive muffler.

[0031] One advantage of this arrangement is that the gas discharged by the compressor 200 will flow through the sound attenuation cavities 2a of each muffler 2 in turn during actual use, so that the sound attenuation effects of the plurality of mufflers 2 are superimposed, thereby improving the noise reduction capability of the sound attenuation device 100. In particular, since the sound attenuation device 100 includes at least one resistive muffler, it has good noise reduction effect on mid-low frequency noise (the noise generated by the compressor 200 is usually mid-low frequency noise).

[0032] Another advantage of this arrangement is that the multiple mufflers 2 have high flexibility in terms of selection, parameter setting, and position arrangement, which can provide the possibility of optimization for different use scenarios, thereby helping to improve the adaptability of the muffling device 100 to complex noise spectra.

[0033] In some embodiments, at least two of the mufflers 2 are resistive mufflers, and the volumes of the muffling cavities 2a of the resistive mufflers are different.

[0034] As mentioned above, the main principle of a resistive muffler is to attenuate sound through the principle of reflection superposition of sound waves, and the frequency range of sound waves that can be reflected by a resistive muffler is related to the volume of the muffling cavity 2a of the muffler 2. In the present embodiment, since the volumes of the muffling cavities 2a of the resistive mufflers are different, the noise frequency ranges covered by the resistive mufflers are also slightly different. In this way, the noise frequency range covered by the muffling device 100 as a whole is improved, which helps to adapt to more complex noise spectra.

[0035] Here, the volume of the muffling cavity 2a is defined as the effective muffling volume of the muffling cavity 2a. In the present embodiment, the specific volumes of the muffling cavities 2a of the resistive mufflers can be determined according to acoustic calculations, which are not limited.

[0036] It should be noted that in the case where the volumes of the muffling cavities 2a of the mufflers 2 are different, the total volumes of the mufflers 2 can be the same or different.

[0037] For example, the shapes of the muffling cavities 2a of the mufflers 2 are all cylindrical, and the diameters and / or axial lengths of the muffling cavities 2a of the mufflers 2 are different, thereby realizing different volumes of the muffling cavities 2a.

[0038] In some embodiments, the volumes of the muffling cavities 2a of the mufflers 2 decrease along the exhaust direction.

[0039] Here, the exhaust direction specifically refers to the flow direction of the airflow when the airflow is discharged from the compressor 200 to the air conditioning main unit 300. It can be understood that during the exhaust process, the sound energy will be attenuated to a certain extent after passing through each muffler 2. Therefore, in the present embodiment, the volumes of the muffling cavities 2a of the mufflers 2 decrease along the exhaust direction. In this way, the gradually attenuating noise can be better addressed, and the occupation of space by the multiple mufflers 2 can be reduced.

[0040] In the present embodiment, in the case where the muffling device includes three or more mufflers, the volumes of the muffling cavities 2a of the mufflers 2 can decrease by equal differences, or by equal ratios, or in a disordered manner, which is not limited.

[0041] In some embodiments, the volume ratio of the sound attenuation cavities 2a of two adjacent sound attenuators 2 in the exhaust direction is 1:0.9-1:0.6, such as 1:0.9, 1:0.85, 1:0.8, 1:0.75, 1:0.7, 1:0.65, 1:0.6, and the like.

[0042] In some embodiments, at least one of the sound attenuators 2 is a resistive sound attenuator. It can be understood that a resistive sound attenuator has better sound attenuation effect on low and medium frequency noise, while a resistive sound attenuator has better sound attenuation effect on high frequency noise. The plurality of sound attenuators 2 in the present embodiment simultaneously includes resistive sound attenuators and resistive sound attenuators, so that the frequency range of noise covered by the sound attenuation device 100 can be further improved, thereby helping to adapt to more complex noise spectrum.

[0043] It should be noted that the arrangement of the plurality of sound attenuators 2 is not limited thereto. For example, the plurality of sound attenuators 2 can all be resistive sound attenuators, and the volumes of the sound attenuation cavities 2a of the plurality of sound attenuators 2 are the same. In this case, different working scenarios can be adapted by adjusting the relative positions of the plurality of sound attenuators 2 and the relative positions of each sound attenuator 2 and the compressor 200, and / or different sound attenuation materials can be arranged in the sound attenuation cavities 2a of different sound attenuators 2 to adapt to different working scenarios. Alternatively, the plurality of sound attenuators 2 can further include more types of sound attenuators, which can be specifically arranged by those skilled in the art according to actual noise reduction needs.

[0044] In some embodiments, referring to Figure 1 and Figure 2 , the exhaust pipe 1 includes a first flexible pipe section 11, and at least one first flexible pipe section 11 is arranged between each adjacent two sound attenuators 2.

[0045] It can be understood that compared with a rigid pipe, a flexible pipe has better sound attenuation effect (the material of the flexible pipe generally has better sound absorption performance), and the flexible pipe also has a certain vibration isolation effect, which can reduce the noise caused by pipe vibration. Therefore, in the present embodiment, the first flexible pipe section 11 is arranged between the adjacent two sound attenuators 2, so that the noise reduction capability of the sound attenuation device 100 can be further improved, and in the case that the sound attenuation device 100 is applied to the thermal management system of the vehicle, the transmission of the vibration of the compressor 200 to the vehicle during operation can be reduced, thereby further improving the NVH performance of the vehicle.

[0046] In this embodiment, the specific material of the first flexible pipe segment 11 is not limited, which can be rubber, etc. In the case that the sound attenuation device 100 is applied to the thermal management system of a vehicle, the material of the first flexible pipe segment 11 can be specifically ethylene propylene diene monomer (EDPM), which has good aging resistance while providing better sound attenuation and vibration isolation effects.

[0047] Further, in this embodiment, the first flexible pipe segment 11 can be directly connected with the muffler 2. Alternatively, the exhaust pipe 1 can include a rigid pipe segment 12, the material of the rigid pipe segment 12 including but not limited to aluminum, aluminum alloy, etc. The opposite ends of the first flexible pipe segment 11 are both connected with the rigid pipe segment 12, and the rigid pipe segment 12 is connected with the muffler 2. Since the muffler 2 usually adopts a rigid shell (such as an aluminum shell, a steel shell, etc.), using the rigid pipe segment 12 to connect with the muffler 2 helps to simplify the connection process and improve the connection stability (such as being directly connected through flanges and bolts, or being welded). In this case, the first flexible pipe segment 11 and the rigid pipe segments 12 at its two ends can be connected through processes such as hot pressing, interference fit, bonding, etc. The specific connection manner can be determined by those skilled in the art according to actual use requirements.

[0048] In Figure 1 and Figure 2 In the embodiments shown, one first flexible pipe segment 11 is arranged between two adjacent mufflers 2. However, those skilled in the art can understand that according to actual arrangement requirements, more first flexible pipe segments 11 can also be arranged between two adjacent mufflers 2. For example, assuming that the pipe segment of the exhaust pipe 1 between two adjacent mufflers 2 needs to be fixed to a certain external structure, a rigid pipe segment 12 can be arranged at the fixed point, and one first flexible pipe segment 11 is arranged between the rigid pipe segment 12 and each of the two adjacent mufflers 2.

[0049] Further, those skilled in the art can understand that the sound attenuation device 100 can also include more mufflers 2. In this case, at least one first flexible pipe segment 11 is arranged between each two adjacent mufflers 2.

[0050] In some embodiments, the diameter of the first flexible pipe segment 11 is 10-14 mm.

[0051] In the related art, the exhaust port of the compressor 200 is usually connected with a pipeline with a diameter of 16 mm. In the present application, it is proposed that the diameter of the exhaust pipe 1, especially the diameter of the flexible part of the exhaust pipe 1, is appropriately reduced, which helps to increase the noise attenuation during the gas flow, and in the embodiment in which the sound attenuation device 100 is applied to the thermal management system of the vehicle, it helps to reduce the transmission of vibration to the vehicle, thereby further improving the NVH performance of the vehicle. Further, it is also proposed in the present application that the diameter of the exhaust pipe 1 is too small (for example, less than 10 mm), which can greatly increase the flow resistance of the gas and reduce the gas flow, thereby affecting the thermal management efficiency, energy consumption, service life of the compressor 200, etc.

[0052] In view of the above, in the present embodiment, the diameter of the first flexible pipe section 11 is set to 10-14 mm, such as 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, etc. In a specific embodiment, the diameter of the first flexible pipe section 11 is 12 mm. It should be noted that the diameter here refers to the outer diameter of the first flexible pipe section 11.

[0053] As mentioned above, in some embodiments, the two ends of the first flexible pipe section 11 can be connected with the rigid pipe section 12. In actual production and manufacturing process, the diameter of the first flexible pipe section 11 can be determined first, and then the diameter of the rigid pipe section 12 can be determined according to the diameter of the first flexible pipe section 11 and the specific connection process selected.

[0054] In some embodiments, referring to Figure 1 and Figure 2 The sound attenuator 2 includes a counterweight 3, and the at least one first flexible pipe section 11 is provided with at least one counterweight 3.

[0055] It can be understood that the first flexible pipe section 11 will vibrate with the flow of gas, thereby playing a role in vibration isolation. However, in certain specific frequency ranges, the first flexible pipe section 11 can resonate with the system. Therefore, in the present embodiment, at least one counterweight 3 is provided on the at least one first flexible pipe section 11. The counterweight 3 can change the natural frequency of the system by adding mass, thereby being able to suppress the resonance phenomenon in a specific frequency range and improve the vibration isolation performance of the system under specific working conditions.

[0056] As an example, the counterweight 3 can be formed as a ring-shaped mass and sleeved on the outer periphery of the first flexible pipe section 11. There can be only one counterweight 3 on one first flexible pipe section 11, or there can be multiple counterweights 3. The number, weight, and position of the counterweights 3 on one first flexible pipe section 11 can be determined by a person skilled in the art according to the actual application environment, and are not limited. Taking the application of the sound attenuation device 100 to a vehicle as an example, the weight of the counterweight 3 can be 150g-250g, such as 150g, 160g, 180g, 200g, 220g, 240g, 250g, and the like.

[0057] As mentioned above, the exhaust pipe 1 can include multiple first flexible pipe sections 11, each of which can be provided with a counterweight 3, or only some of the first flexible pipe sections 11 can be provided with a counterweight 3. In the case where multiple first flexible pipe sections 11 are provided with a counterweight 3, the number and mass of the corresponding counterweights 3 of each first flexible pipe section 11 can be the same or different, and are not limited.

[0058] In some embodiments, referring to Figure 2 , along the exhaust direction of the exhaust pipe 1, the silencer 2 at the upstream end is the first silencer 21. The exhaust direction of the exhaust pipe 1 here should be understood as the direction of the gas flow in the exhaust pipe 1 during actual use, and the silencer 2 at the upstream end should be understood as the silencer into which the gas first enters.

[0059] The first silencer 21 includes a body 211 and a mounting bracket 212, and the sound attenuation cavity 2a is formed in the body 211. The body 211 and the compressor 200 are fastened and connected through the mounting bracket 212.

[0060] Here, fastening and connecting specifically means connecting them in a manner that they do not move relative to each other substantially in the normal use state. The specific structure of the mounting bracket 212 is not limited, as long as it can achieve the fastening and connection of the body 211 and the compressor 200. As an example, the mounting bracket 212 can be formed with at least one threaded hole, and in actual use, the mounting bracket 212 can be connected to the shell of the compressor 200 by means of a bolt, thereby mounting the body 211 to the compressor 200.

[0061] In this embodiment, the first silencer 21 can be directly connected to the compressor 200, so that the distance between the first silencer 21 and the compressor 200 can be shortened, and the gas discharged by the compressor 200 can enter the first silencer 21 more quickly, thereby helping to improve the noise reduction effect. In addition, the direct connection of the first silencer 21 and the compressor 200 helps to improve the compactness of the thermal management system, thereby helping to adapt to complex installation environments (such as vehicles).

[0062] In some embodiments, referring to Figure 2 The body 211 is a columnar structure, and an outer surface of the body 211 forms an air inlet 211a and an air outlet 211b that are in communication with the sound attenuation cavity 2a. The mounting bracket 212 and the air outlet 211b are both arranged on the circumferential outer surface of the body 211, and the mounting bracket 212 and the air outlet 211b are arranged in a staggered manner along the circumference of the body 211. In this embodiment, the mounting bracket 212 and the air outlet 211b are arranged along the circumference of the body 211, so that the possibility of interference between the first sound attenuator 21, the compressor 200, and the exhaust pipe 1 can be reduced, and assembly is facilitated.

[0063] In this embodiment, the air inlet 211a can be arranged on the axial outer surface of the body 211 or on the circumferential outer surface of the body 211, and no limitation is made in this regard. It should be noted that, in order to improve the flow of gas in the sound attenuation cavity 2a, the air inlet 211a and the air outlet 211b should be arranged at the opposite end regions of the sound attenuation cavity 2a along the exhaust direction.

[0064] In some embodiments, referring to Figure 2 Along the exhaust direction of the exhaust pipe 1, one sound attenuator 2 located at the downstream end is a second sound attenuator 22, where the one sound attenuator 2 located at the downstream end refers to the sound attenuator 2 into which gas enters last. The exhaust pipe 1 includes a second flexible pipe section 13, which is arranged downstream of the second sound attenuator 22 along the exhaust direction, that is, in actual use, the second flexible pipe section 13 communicates the second sound attenuator 22 with the air conditioner main unit 300. Similarly to the first flexible pipe section 11, the second flexible pipe section 13 can also have the effects of noise reduction and vibration isolation.

[0065] In this embodiment, similarly, the second flexible pipe section 13 can be connected to the second sound attenuator 22 through a rigid pipe section 12, and the downstream of the second flexible pipe section 13 can be connected to the rigid pipe section 12, which is used to be connected to the air conditioner main unit 300.

[0066] Those skilled in the art can understand that, in some other embodiments, the second flexible pipe section 13 can not be arranged, and the second sound attenuator 22 can be directly connected to the air conditioner main unit 300 through the rigid pipe section 12.

[0067] In some embodiments, similarly to the first flexible pipe section 11, the diameter of the second flexible pipe section 13 can be 10-14 mm, so as to further improve the noise reduction and vibration isolation performance of the second flexible pipe section 13. In this embodiment, the diameter of the first flexible pipe section 11 and the diameter of the second flexible pipe section 13 can be the same or different, and no limitation is made in this regard.

[0068] The silencing device 100 in one or more embodiments described above will be described in more detail and specifically below in combination with a specific embodiment.

[0069] The silencing device 100 of the present embodiment is applied to the thermal management system of a vehicle, and with reference to Figure 2 , the silencing device 100 comprises an exhaust pipe 1, a first silencer 21 and a second silencer 22, the first silencer 21 and the second silencer 22 both have a silencing cavity 2a, the exhaust pipe 1 connects the silencing cavities 2a of the first silencer 21 and the second silencer 22 in series, and the first silencer 21 is distributed along the exhaust direction of the exhaust pipe 1.

[0070] The first silencer 21 and the second silencer 22 are both resistance silencers, and the volumes of the silencing cavities 2a of the first silencer 21 and the second silencer 22 can be the same or different.

[0071] In actual use, the first silencer 21 is installed to the compressor 200, and the second silencer 22 is installed to the longitudinal beam of the vehicle.

[0072] The first silencer 21 can specifically comprise a body 211 and a mounting bracket 212, the body 211 is a columnar structure, the outer surface of the body 211 forms an air inlet 211a and an air outlet 211b which are in communication with the silencing cavity 2a, the mounting bracket 212 and the air outlet 211b are both arranged on the circumferential outer surface of the body 211, and the mounting bracket 212 and the air outlet 211b are arranged in a staggered manner along the circumference of the body 211, wherein the air outlet 211b is located at the axial one side end region of the body 211, and the air inlet 211a is close to the axial other side end region of the body 211.

[0073] The exhaust pipe 1 comprises one first flexible pipe section 11, one second flexible pipe section 13 and a plurality of rigid pipe sections 12. The opposite ends of the first flexible pipe section 11 are respectively communicated with the first silencer 21 and the second silencer 22 through one rigid pipe section 12, and the opposite ends of the second flexible pipe section 13 are respectively communicated with the second silencer 22 and the air conditioner main unit 300 through one rigid pipe section 12. The first silencer 21 is communicated with the exhaust port of the compressor 200 through one rigid pipe section 12.

[0074] The diameters of the first flexible pipe section 11 and the second flexible pipe section 13 are the same, both being 10-14mm, and preferably 12mm.

[0075] The silencing device 100 further comprises a counterweight 3, the counterweight 3 is arranged on the first flexible pipe section 11, the counterweight 3 specifically has a ring structure and is sleeved on the outer periphery of the first flexible pipe section 11, and the weight of the counterweight 3 is 150g-250g, and preferably 200g.

[0076] Embodiments of the present application also provide a thermal management system, referring to Figure 2 which comprises the compressor 200, the air conditioning host 300, and the sound attenuation device 100 as described in any of the above embodiments, wherein the exhaust pipe 1 of the sound attenuation device 100 communicates the exhaust hole of the compressor 200 and the air conditioning host 300.

[0077] Embodiments of the present application also provide a vehicle comprising the noise reduction device as described in any of the above embodiments, or the vehicle as described in any of the above embodiments.

[0078] The noise reduction device and the vehicle of the embodiments of the present application have all the advantages of the sound attenuation device 100 as described in any of the above embodiments, which will not be repeated here.

[0079] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the illustrative description of the above terms is not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined by those skilled in the art without contradiction, as long as they do not contradict each other.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sound attenuating device, characterized in that The sound attenuation device comprises: an exhaust pipe for connecting an exhaust port of the compressor with the air conditioning host; and a plurality of sound attenuators, each of which has a sound attenuation cavity, and the exhaust pipe connects the sound attenuation cavities of the sound attenuators in series, wherein at least one of the sound attenuators is a resistive sound attenuator.

2. The sound attenuating device of claim 1, wherein, At least two of the sound attenuators are resistive sound attenuators, and the sound attenuation cavities of the resistive sound attenuators are different in volume; and / or At least one of the sound attenuators is a resistive sound attenuator.

3. The sound attenuating device of claim 1, wherein, The exhaust pipe comprises a first flexible pipe section, and at least one first flexible pipe section is arranged between each adjacent two sound attenuators.

4. The sound attenuating device of claim 3, wherein, The diameter of the first flexible pipe section is 10-14 mm.

5. The sound attenuating device of claim 4, wherein, The sound attenuation device comprises a counterweight (3), and at least one first flexible pipe section is provided with at least one counterweight.

6. The sound attenuating device of any one of claims 1-5, wherein, One of the sound attenuators at the upstream end in the exhaust direction of the exhaust pipe is a first sound attenuator, The first sound attenuator comprises a body and a mounting bracket, the sound attenuation cavity is formed in the body, and the body is fastened and connected with the compressor through the mounting bracket.

7. The sound attenuating device of claim 6, wherein, The body is in a columnar structure, and the outer surface of the body forms an air inlet and an air outlet which are in communication with the sound attenuation cavity, the mounting bracket and the air outlet are arranged on the circumferential outer surface of the body, and the mounting bracket and the air outlet are arranged in a staggered manner along the circumference of the body.

8. The sound attenuating device of any one of claims 1-5, 7, wherein, One of the sound attenuators at the downstream end in the exhaust direction of the exhaust pipe is a second sound attenuator, The exhaust pipe comprises a second flexible pipe section, and the second flexible pipe section is arranged downstream of the second sound attenuator in the exhaust direction.

9. A thermal management system, characterized by, The thermal management system comprises a compressor, an air conditioning host, and the sound attenuation device according to any one of claims 1-8, wherein the exhaust pipe connects the exhaust port of the compressor with the air conditioning host.

10. A vehicle characterized by comprising: The vehicle comprises the sound attenuation device according to any one of claims 1-8, or the thermal management system according to claim 9.

Images