A design method for an air conditioner outdoor unit and a noise reduction cover

Abstract

This application provides a design method for an outdoor air conditioner unit and a noise reduction cover, particularly relating to the field of air conditioning technology. The outdoor air conditioner unit includes: a casing with a receiving cavity inside; a compressor disposed within the receiving cavity; and a noise reduction cover surrounding the compressor for noise reduction. The noise reduction cover includes a first material layer and a second material layer. The first material layer absorbs first noise, and the second material layer isolates the first noise, which is noise generated by the compressor. The density and thickness of the first and second material layers are matched to the noise parameters of the compressor, so that the second noise emitted by the outdoor air conditioner unit meets preset conditions. The noise parameters of the compressor include the frequency and amplitude of the first noise, and the second noise refers to the noise after the first noise has been reduced by the noise reduction cover.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a design method for an air conditioning outdoor unit and a noise reduction cover. Background Technology

[0002] Currently, with the development of technology and the continuous improvement of residents' living standards, air conditioners have become an indispensable electrical appliance in every household, and there are many different types of outdoor air conditioner units.

[0003] However, air conditioners often produce noise during operation, affecting the user experience. This noise is mainly caused by the compressor in the outdoor unit. Current technologies typically use sound-insulating materials to enclose the compressor, but this only effectively reduces the noise from a small portion of the compressor and cannot meet the noise reduction needs of various outdoor air conditioner units. Summary of the Invention

[0004] This application provides a design method for an outdoor air conditioning unit and a noise reduction cover. The density and thickness of the material of the noise reduction cover in the outdoor unit are matched with the frequency and amplitude of the noise generated by the compressor, so that the noise reduction cover meets the noise reduction requirements of the compressor.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, an outdoor unit for an air conditioner is provided, the outdoor unit comprising:

[0007] The housing has a receiving cavity inside;

[0008] The compressor is located within the receiving cavity;

[0009] A noise reduction cover, which is placed around the compressor, is used to reduce the noise of the compressor.

[0010] The noise reduction cover includes a first material layer and a second material layer; the first material layer is used to absorb the first noise, and the second material layer is used to isolate the first noise, which is the noise generated by the compressor.

[0011] The density and thickness of the first and second material layers are matched with the noise parameters of the compressor so that the second noise emitted by the outdoor unit of the air conditioner meets the preset conditions. The noise parameters of the compressor include the frequency and amplitude of the first noise, and the second noise refers to the noise after the first noise is reduced by the noise reduction cover.

[0012] Air conditioning compressors come in various types, including reciprocating piston compressors, rotary compressors, and scroll compressors. These different types operate on different principles and produce varying levels of noise. For example, a reciprocating piston compressor moves continuously under the drive of a motor, with a connecting rod causing the piston to reciprocate up and down within the cylinder, thus achieving the refrigeration cycle. In a rotary compressor, the rotor within the cylinder is driven by an eccentric shaft connected to a motor, rolling along the cylinder wall to achieve the same refrigeration cycle. Because of the different structures and operating principles of these compressors, the frequency and amplitude of the noise produced differ, requiring different noise reduction measures.

[0013] In this embodiment, the density and thickness of the first and second material layers of the noise reduction cover are matched with the noise parameters of the compressor, ensuring that the frequency and amplitude of the noise emitted by the compressor after the noise reduction cover is installed meet the noise reduction requirements. Specifically, after the initial noise reduction cover is installed on the compressor, the frequency and amplitude of the noise emitted by the compressor are obtained. If the frequency and amplitude of the noise do not meet the noise reduction requirements, the first and second material layers of the noise reduction cover are adjusted to ensure that the noise reduction cover meets the noise reduction requirements of the compressor.

[0014] The technical solution provided in this application provides at least the following beneficial effects: Since different types of compressors generate noise of different frequencies or amplitudes during operation, equipping the compressor with a noise-reducing cover that matches the frequency and amplitude of its noise enables targeted noise reduction based on the actual situation of the compressor, improving noise reduction efficiency and ensuring the effectiveness of noise reduction. Furthermore, the noise-reducing cover is composed of materials for absorbing noise and materials for isolating noise, which not only reduces material costs but also improves noise reduction efficiency.

[0015] In some embodiments, the second material layer serves as the outer layer of the noise reduction shield, wrapping around the outside of the first material layer.

[0016] In this way, the noise emitted by the compressor can be absorbed by the first material layer and then soundproofed by the second material layer. This not only achieves noise reduction, but also provides good support for the noise reduction cover due to the higher density of the second material layer.

[0017] In some embodiments, the first material layer serves as the outer layer of the noise reduction shield, wrapping around the outside of the second material layer.

[0018] In this way, the noise emitted by the compressor can be absorbed by the first material layer after being soundproofed by the second material layer, thereby improving the noise reduction effect.

[0019] In some embodiments, the first material layer comprises a porous material.

[0020] In this way, when noise passes through the multiple pores of the first material, it will be converted into heat energy through friction with the multiple pores, thereby attenuating the sound waves of the noise.

[0021] Secondly, embodiments of this application provide a design method for a noise reduction cover, which is used to reduce the first noise generated by the compressor of an outdoor air conditioner unit; the method includes:

[0022] An initial noise reduction shield is provided, which includes a first material layer and a second material layer; the first material layer is used to absorb first noise, and the second material layer is used to isolate the first noise.

[0023] The initial noise reduction cover is wrapped around the compressor, and the second noise is tested to obtain the noise parameters corresponding to the second noise. The second noise refers to the noise after the first noise is reduced by the first noise reduction cover. The noise parameters corresponding to the second noise include the frequency and amplitude of the second noise.

[0024] If the noise parameters corresponding to the second noise do not meet the preset conditions, one or more design parameters of the initial noise reduction cover are adjusted based on the predetermined correlation and the noise parameters corresponding to the second noise. The design parameters include the density of the first material layer, the thickness of the first material layer, the density of the second material layer, and the thickness of the second material layer. The correlation indicates the influence of each design parameter on the noise parameters corresponding to the second noise.

[0025] As can be seen from the above embodiments, since there are many types of air conditioning compressors, the frequency and amplitude of the noise generated during operation may differ. For example, a piston compressor moves continuously under the drive of a motor, and the piston reciprocates up and down in the cylinder via a connecting rod, thereby achieving a refrigeration cycle. In a rotary compressor, the rotor in the cylinder is driven by an eccentric shaft connected to a motor, rolling along the cylinder wall to achieve a refrigeration cycle. Because different types of compressors have different structures and operating principles, they generate different noise frequencies and amplitudes, requiring different noise reduction measures. A single-specification noise reduction cover cannot meet the noise reduction requirements of different types of compressors. Therefore, this embodiment first obtains the noise parameters of the second noise level after the initial noise reduction cover is installed, and determines whether the initial noise reduction cover meets the noise reduction requirements of the compressor based on whether the noise parameters meet preset conditions. Furthermore, since the density and thickness of the first and second material layers in the noise reduction cover can affect the noise reduction effect, if the initial noise reduction cover does not meet the noise reduction requirements of the compressor, one or more of the following can be adjusted until the noise reduction cover meets the noise reduction requirements of the compressor: the density of the first material layer, the thickness of the first material layer, the density of the second material layer, and the thickness of the second material layer. In this way, noise reduction covers that meet the noise reduction requirements of different types of compressors can be designed, thereby preventing compressor noise from affecting the user experience.

[0026] In some embodiments, the preset conditions include: the amplitude of the second noise in a first frequency range is less than or equal to a first preset amplitude; the amplitude of the second noise in a second frequency range is less than or equal to a second preset amplitude; and the amplitude of the second noise in a third frequency range is less than or equal to a third preset amplitude; wherein, the frequency in the first frequency range is less than the frequency in the second frequency range, and the frequency in the second frequency range is less than the frequency in the third frequency range; the first preset amplitude is less than the second preset amplitude, and the second preset amplitude is less than the third preset amplitude.

[0027] In this way, it can be determined whether the initial noise reduction cover meets the noise reduction requirements of the compressor based on preset conditions. And according to the frequency range of the second noise, combined with the influence of the density and thickness of the first and second material layers on the noise frequency and amplitude, the initial noise reduction cover is adjusted accordingly so that the adjusted noise reduction cover meets the noise reduction requirements of the compressor.

[0028] In some embodiments, when the noise parameters corresponding to the second noise do not meet the preset conditions, one or more design parameters of the initial noise reduction cover are adjusted based on the predetermined correlation and the noise parameters corresponding to the second noise, including: if the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or if the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, the density of the first material layer is increased; if the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, the thickness of the first material layer is increased.

[0029] As can be seen from the above embodiments, the absorption capacity for low and mid-frequency noise (e.g., 0-1000Hz) increases when the density of the first material layer increases. Therefore, when the amplitude of noise in the low-frequency range (first frequency) is greater than a first preset amplitude or the amplitude of noise in the mid-frequency range (second frequency) is greater than a second preset amplitude, the amplitude of noise in the low and mid-frequency range can be reduced by increasing the density of the first material layer. Furthermore, since increasing the thickness of the first material layer can reduce the amplitude of noise in the frequency range that the first material layer can absorb, the amplitude of noise in the high-frequency range (third frequency) can also be reduced by increasing the thickness of the first material layer.

[0030] In some embodiments, the thickness of the adjusted first material layer is less than or equal to a preset thickness, and the density of the adjusted first material layer is less than or equal to a preset density.

[0031] As can be seen from the above embodiments, increasing the density or thickness of the first material layer can effectively reduce the amplitude in the low and mid-frequency range. However, as the density or thickness of the first material layer increases, the material cost increases, while the noise absorption efficiency decreases. Therefore, by controlling the adjusted density of the first material layer to be no greater than a preset density and the adjusted thickness of the first material layer to be no greater than a preset thickness, the noise absorption efficiency can be guaranteed while considering material cost.

[0032] In some embodiments, when the noise parameters corresponding to the second noise do not meet the preset conditions, one or more design parameters of the initial noise reduction cover are adjusted based on the predetermined correlation and the noise parameters corresponding to the second noise, including: if the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or if the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, then the thickness of the second material layer is increased; if the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, then the density of the second material layer is increased.

[0033] As can be seen from the above embodiments, increasing the thickness of the second material layer increases the sound insulation capability for noise in the low and mid-frequency range (e.g., 0-1000Hz). Therefore, when the amplitude of noise in the low-frequency range (first frequency) is greater than a first preset amplitude or the amplitude of noise in the mid-frequency range (second frequency) is greater than a second preset amplitude, the amplitude of noise in the low and mid-frequency range can be reduced by increasing the thickness of the second material layer. Furthermore, since increasing the density of the second material layer can reduce the amplitude of noise in the sound insulation frequency range of the second material layer, the amplitude of noise in the high-frequency range (third frequency) can also be reduced by increasing the density of the second material layer.

[0034] Thirdly, embodiments of this application provide an air conditioning system, which includes:

[0035] The outdoor air conditioning unit provided in the first aspect;

[0036] The indoor unit of an air conditioner is connected to the outdoor unit via connecting pipes.

[0037] The beneficial effects described in various aspects of this application can be referenced in turn, and will not be repeated here. Attached Figure Description

[0038] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0039] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of an outdoor unit of an air conditioner provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of another air conditioner outdoor unit provided in an embodiment of this application;

[0042] Figure 4 A cross-sectional schematic diagram of a noise reduction cover provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of another air conditioner outdoor unit provided in an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of another air conditioner outdoor unit provided in an embodiment of this application;

[0045] Figure 7 A flowchart illustrating a noise reduction shield design method provided in an embodiment of this application;

[0046] Figure 8 A flowchart illustrating another noise reduction shield design method provided in this application embodiment;

[0047] Figure 9 A flowchart illustrating another noise reduction shield design method provided in this application embodiment;

[0048] Figure 10 This is a flowchart illustrating a noise reduction cover design method provided in an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0052] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0053] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" as used in this application have the meaning of establishing electrical conductivity. The specific meaning needs to be understood in conjunction with the context.

[0054] The terms “comprising” and “having”, and any variations thereof, used in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0055] Furthermore, in the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the words "exemplary" or "for example" are intended to present the relevant concepts in a specific manner.

[0056] Air conditioners often produce noise during operation, affecting the user experience. This noise is mainly caused by the compressor in the outdoor unit. Because there are various types of compressors in outdoor units—for example, piston compressors move continuously driven by a motor, with a piston reciprocating in a cylinder via a connecting rod to achieve the refrigeration cycle; in rotary compressors, the rotor in the cylinder is driven by an eccentric shaft connected to a motor, rolling along the cylinder wall to achieve the refrigeration cycle—the different types of compressors, due to their different structures and operating principles, produce noise with varying frequencies and amplitudes, requiring different noise reduction measures. Therefore, a single type of noise reduction enclosure cannot meet the noise reduction requirements of different types of compressors.

[0057] In view of this, the present application first provides an outdoor unit of an air conditioner and an air conditioning system including the outdoor unit of the air conditioner. The outdoor unit of the air conditioner includes a noise reduction cover that matches the noise parameters of the compressor, so that the compressor meets the noise reduction requirements through the noise reduction cover.

[0058] The air conditioning system provided in this application embodiment can be a window air conditioning system, a split wall-mounted air conditioning system, a split cabinet air conditioning system, a ceiling-mounted air conditioning system, an embedded air conditioning system, a central air conditioning system, or a vehicle air conditioning system. This application embodiment does not impose any restrictions on this.

[0059] To further describe the technical solution of the embodiments of this application, a split-type wall-mounted air conditioning system is taken as an example. Figure 1 The diagram shown is a schematic representation of the mechanical structure of an air conditioning system according to an embodiment of this application. Figure 1 The air conditioning system 11 shown may include: an indoor unit 100, an outdoor unit 200, connecting pipes 300, and a remote control 400.

[0060] In some embodiments, taking a split-type wall-mounted air conditioning system as an example, the indoor unit 100 is typically installed on the indoor wall.

[0061] In some embodiments, the outdoor unit 200 is typically installed outdoors for heat exchange with the indoor environment. Additionally, in Figure 1 In the diagram, since the outdoor unit 200 is located outdoors on the opposite side of the indoor unit 100, separated by a wall, the outdoor unit 200 is represented by a dashed line.

[0062] In some embodiments, such as Figure 2 As shown, the outdoor unit 200 may include a housing 201, a compressor 202, and a noise reduction cover 203.

[0063] In some embodiments, the housing 201 may be as follows: Figure 1 The approximate cuboid shown can also be of other shapes, used to house and protect the electrical components inside the outdoor unit 200.

[0064] In some embodiments, the discharge port of compressor 202 is connected to outdoor heat exchanger 207 via four-way reversing valve 204 to power refrigerant circulation. During operation, compressor 202 may generate one or more noises of different frequencies and amplitudes.

[0065] In some embodiments, the noise reduction cover 203 includes a noise reduction cover cap 2031 and a noise reduction cover body 2032. The noise reduction cover body 2032 surrounds the compressor 202, and the noise reduction cover cap 2031 covers the top of the noise reduction cover body 2032.

[0066] In some embodiments, such as Figure 3 As shown, the noise reduction cover 203 is wrapped around the compressor 202 to reduce the noise of the compressor 202.

[0067] In some embodiments, such as Figure 4 As shown, the noise reduction cover 203 includes a first material layer 2033 and a second material layer 2034.

[0068] The first material layer 2033 is used to absorb the noise generated by the compressor 202.

[0069] For example, the first material layer 2033 includes a sound-absorbing material.

[0070] Optionally, the first material layer 2033 is a porous material. In this way, when noise passes through the multiple pores of the first material layer 2033, it will be converted into heat energy through friction with the multiple pores, thereby attenuating the sound waves of the noise.

[0071] The second material layer 2034 is used to isolate the noise generated by the compressor 202. The second material layer can achieve the purpose of sound insulation by attenuating the penetration ability of noise.

[0072] For example, the second material layer 2034 is a sound insulation material.

[0073] Extensive experimental results show that, when considering only the density of the sound-absorbing material, increasing the density decreases the frequency range of noise that the material can absorb, meaning it increases its absorption capacity for low and mid-frequency (e.g., 0-1000Hz) noise, but does not significantly change the amplitude of noise within that frequency range. Similarly, when considering only the thickness of the sound-absorbing material, increasing the thickness does not significantly change the frequency range of secondary noise that the material can absorb, but it can reduce the amplitude of noise within that frequency range. Likewise, when considering only the density of the sound-insulating material, increasing the density does not significantly change the frequency range of sound that the material can insulate, but it can reduce the amplitude of noise within that frequency range. Finally, when considering only the thickness of the sound-insulating material, increasing the thickness decreases the frequency range of secondary noise that the material can insulate, meaning it increases its sound insulation capacity for low and mid-frequency (e.g., 0-1000Hz) noise, but it does not significantly change the amplitude of noise within that frequency range. Therefore, the noise reduction cover provided in this application adjusts the density and thickness of the sound-absorbing and sound-insulating materials, which can improve the noise reduction effect while saving costs.

[0074] Optional, such as Figure 5 As shown, the second material layer 2034 serves as the outer layer of the noise reduction cover 203, wrapping around the outside of the first material layer 2033.

[0075] Optional, such as Figure 6 As shown, the first material layer 2033 serves as the outer layer of the noise reduction cover 203, wrapping around the outside of the second material layer 2034.

[0076] In some embodiments, the outdoor unit 200 may further include: a four-way reversing valve, a fan, a throttling device, and an outdoor heat exchanger.

[0077] In some embodiments, the four-way reversing valve has four ports, which are respectively connected to the exhaust port of the compressor 202, the indoor heat exchanger, the suction port of the compressor 202, and the outdoor heat exchanger, and are used to switch between cooling mode and heating mode by changing the flow direction of the refrigerant in the system pipeline.

[0078] In some embodiments, a fan is disposed in the outdoor unit 200 to generate airflow in the outdoor air near the outdoor heat exchanger, thereby promoting heat exchange between the refrigerant flowing in the heat transfer tubes of the outdoor heat exchanger and the outdoor air.

[0079] Optionally, the outdoor unit 200 also includes a fan motor, which is connected to the fan and is used to drive or change the fan speed.

[0080] In some embodiments, a throttling device is provided in the outdoor unit 200 to expand the refrigerant flowing through the throttling device to achieve a pressure reduction effect, thereby regulating the refrigerant flow rate in the refrigerant passage. Optionally, the throttling device can be an electronic expansion valve.

[0081] In some embodiments, an outdoor heat exchanger is disposed in an outdoor unit 200 for heat exchange between the refrigerant flowing in the heat transfer tubes of the outdoor heat exchanger and the outdoor air.

[0082] In some embodiments, a connecting pipe 300 is connected between the indoor unit 100 and the outdoor unit 200 to form a refrigerant circuit for refrigerant circulation.

[0083] In some embodiments, the remote controller 400 is an accessory device to the air conditioning system 11, and has the function of communicating with the controller, for example, using infrared or other communication methods. The remote controller 400 is used to realize the interaction between the user and the air conditioning system. The user can perform operations such as turning the air conditioning system on and off, setting the temperature, setting the airflow direction, and setting the airflow through the display device and buttons on the remote controller.

[0084] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0085] like Figure 7 As shown, this application provides a design method for a noise-canceling cover, which includes the following steps:

[0086] S1. Provide initial noise reduction cover.

[0087] The initial noise reduction cover includes a first material layer and a second material layer; the first material layer is used to absorb the first noise, and the second material layer is used to isolate the first noise. The first noise is the noise generated by the compressor.

[0088] For example, the first material layer is a sound-absorbing material, and the second material layer is a sound-insulating material.

[0089] S2. Wrap the initial noise reduction cover around the compressor and test the second noise to obtain the noise parameters corresponding to the second noise.

[0090] The second noise refers to the noise after the first noise has been reduced by the first noise reduction cover. The noise parameters corresponding to the second noise include the frequency and amplitude of the second noise. In this way, the frequency and amplitude of the noise emitted by the compressor after the initial noise reduction by the noise reduction cover can be obtained.

[0091] S3. If the noise parameters corresponding to the second noise do not meet the preset conditions, adjust one or more design parameters of the initial noise reduction cover based on the predetermined correlation and the noise parameters corresponding to the second noise.

[0092] The design parameters include the density and thickness of the first material layer, the density and thickness of the second material layer, and the correlation indicates the influence of each design parameter on the noise parameters corresponding to the second noise level. Thus, the design parameters of the initial noise reduction enclosure can be adjusted based on the influence of the density and thickness of the sound-absorbing or sound-insulating material on the noise frequency and amplitude, thereby ensuring that the adjusted noise reduction enclosure meets the noise reduction requirements of the compressor.

[0093] In some embodiments, the preset conditions include: the amplitude of the second noise in a first frequency range is less than or equal to a first preset amplitude; the amplitude of the second noise in a second frequency range is less than or equal to a second preset amplitude; and the amplitude of the second noise in a third frequency range is less than or equal to a third preset amplitude.

[0094] Among them, the frequency in the first frequency range is less than the frequency in the second frequency range, and the frequency in the second frequency range is less than the frequency in the third frequency range; the first preset amplitude is less than the second preset amplitude, and the second preset amplitude is less than the third preset amplitude.

[0095] For example, the preset conditions include: when the frequency of the second noise is less than 400Hz and 0Hz, the amplitude of the second noise is less than 55dBA; when the frequency of the second noise is less than 1000Hz and 400Hz, the amplitude of the second noise is less than 57.5dBA; when the frequency of the second noise is greater than or equal to 1000Hz, the amplitude of the second noise is less than 60dBA.

[0096] In this way, it can be determined whether the initial noise reduction cover meets the noise reduction requirements of the compressor based on preset conditions. And according to the frequency range of the second noise, the initial noise reduction cover is adjusted accordingly so that the adjusted noise reduction cover meets the noise reduction requirements of the compressor.

[0097] Figure 7The illustrated embodiments offer at least the following beneficial effects: Since there are various types of air conditioning compressors, the frequency and amplitude of noise generated during operation may differ. For example, a piston compressor moves continuously under the drive of a motor, and the piston reciprocates up and down in the cylinder via a connecting rod, thus achieving a refrigeration cycle. In a rotary compressor, the rotor in the cylinder is driven by an eccentric shaft connected to a motor, rolling along the cylinder wall to achieve a refrigeration cycle. Because different types of compressors have different structures and operating principles, they generate different noise frequencies and amplitudes, requiring different noise reduction measures. A single-specification noise reduction cover cannot meet the noise reduction requirements of different types of compressors. Therefore, this embodiment first obtains the noise parameters of the second noise level after the initial noise reduction cover is installed, and determines whether the initial noise reduction cover meets the noise reduction requirements of the compressor based on whether the noise parameters meet preset conditions. Furthermore, since the density and thickness of the first and second material layers in the noise reduction cover can affect the noise reduction effect, if the initial noise reduction cover does not meet the noise reduction requirements of the compressor, one or more of the following can be adjusted until the noise reduction cover meets the noise reduction requirements of the compressor: the density of the first material layer, the thickness of the first material layer, the density of the second material layer, and the thickness of the second material layer. In this way, noise reduction covers that meet the noise reduction requirements of different types of compressors can be designed, thereby preventing compressor noise from affecting the user experience.

[0098] In some embodiments, such as Figure 8 As shown, step S3 may include steps S311-S312.

[0099] S311. If the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, then increase the density of the first material layer.

[0100] For example, the first frequency range is 0-400Hz, and the first preset amplitude is 55dBA; the second frequency range is 400-1000Hz, and the second preset amplitude is 57.5Hz.

[0101] As can be seen from the above embodiments, the absorption capacity for low and mid-frequency noise (e.g., 0-1000Hz) increases when the density of the first material layer increases. Therefore, when the amplitude of noise in the low and mid-frequency range is greater than the corresponding preset amplitude, the amplitude of noise in the low and mid-frequency range can be reduced by increasing the density of the first material layer.

[0102] In some embodiments, the density of the adjusted first material layer is less than or equal to a preset density. For example, the preset density is 2 g / cm³. 3 .

[0103] As can be seen from the above embodiments, increasing the density of the first material layer can effectively reduce the amplitude in the low and mid-frequency range. However, as the density of the first material layer increases, the material cost increases, while the noise absorption efficiency decreases. Therefore, controlling the adjusted density of the first material layer to not exceed a preset density can ensure the noise absorption efficiency while considering material cost.

[0104] S312. If the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, then increase the thickness of the first material layer.

[0105] For example, the third frequency range is above 1000Hz, and the third preset amplitude is 60dBA.

[0106] As can be seen from the above embodiments, increasing the thickness of the first material layer can reduce the amplitude of the noise absorbed by the first material layer within the frequency range. Therefore, for noise in the high-frequency range, the amplitude of the noise in the high-frequency range can be reduced by increasing the thickness of the first material layer.

[0107] In some embodiments, the thickness of the adjusted first material layer is less than or equal to a preset thickness.

[0108] As can be seen from the above embodiments, increasing the thickness of the first material layer can effectively reduce the amplitude within the frequency range that the first material layer can absorb. However, as the thickness of the first material layer increases, the material cost increases, while the noise absorption efficiency decreases. Therefore, controlling the adjusted thickness of the first material layer to not exceed a preset thickness can ensure the noise absorption efficiency while considering material costs.

[0109] In some embodiments, if the amplitudes in the first frequency range, the second frequency range, and the third frequency range are greater than the first preset amplitude, the second preset amplitude, and the third preset amplitude, respectively, the thickness and density of the first material layer are increased simultaneously to ensure that the noise reduction requirements of the compressor are met.

[0110] In some embodiments, such as Figure 9 As shown, step S3 may also include steps S313-S314.

[0111] S313. If the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, then increase the thickness of the second material layer.

[0112] As can be seen from the above embodiments, the sound insulation capability for low and mid-frequency noise (e.g., 0-1000Hz) increases when the thickness of the second material layer increases. Therefore, when the amplitude of noise in the low and mid-frequency range is greater than the corresponding preset amplitude, the amplitude of noise in the low and mid-frequency range can be reduced by increasing the thickness of the second material layer.

[0113] S314. If the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, then increase the density of the second material layer.

[0114] As can be seen from the above embodiments, increasing the density of the second material layer can reduce the amplitude of the second material layer within the sound insulation frequency range. Therefore, for noise in the high-frequency range, the amplitude of the noise in the high-frequency range can be reduced by increasing the density of the second material layer.

[0115] In some embodiments, the density and thickness of the second material layer are adjusted only if the second noise still does not meet the preset conditions after the density and thickness of the first material layer are adjusted.

[0116] As can be seen from the above embodiments, in terms of material cost, ease of processing, space occupied, and noise reduction effect, changing the density and thickness of the first material layer is the preferred design solution. Therefore, if the second noise still does not meet the preset conditions after adjusting the density and thickness of the first material layer, the density and thickness of the second material layer are then adjusted. This ensures the noise reduction effect while saving costs, making the design of the noise reduction cover more reasonable.

[0117] In some embodiments, if the amplitudes in the first frequency range, the second frequency range, and the third frequency range are greater than the first preset amplitude, the second preset amplitude, and the third preset amplitude, respectively, the thickness and density of the second material layer are increased simultaneously to ensure that the noise reduction requirements of the compressor are met.

[0118] The following is combined with Figure 10 This section provides a detailed explanation of the complete process of designing this noise-canceling cover.

[0119] Start the process.

[0120] An initial noise reduction cover was installed on the compressor, and parameters of the second noise were obtained.

[0121] Determine whether the parameters of the second noise meet the preset conditions.

[0122] The process ends when the parameters of the second noise meet the preset conditions.

[0123] When the parameters of the second noise do not meet the preset conditions, it is determined that the second noise is in the low-frequency range, mid-frequency range, high-frequency range, or full-frequency range.

[0124] When the second noise includes noise across the entire frequency range, the thickness and density of the first material are simultaneously increased.

[0125] When the second noise includes low- and mid-frequency noise, increase the density of the first material.

[0126] When the frequency of the second noise is in the high-frequency range, the thickness of the first material is increased.

[0127] Determine whether the parameters of the second noise after adjusting the first material meet the preset conditions.

[0128] If the parameters of the second noise after adjusting the first material meet the preset conditions, the process ends.

[0129] If the parameters of the second noise do not meet the preset conditions, determine whether the thickness of the adjusted first material is less than or equal to the preset thickness and whether the density of the adjusted first material is less than or equal to the preset density.

[0130] If the adjusted thickness of the first material is less than or equal to the preset thickness and the adjusted thickness of the first material is less than or equal to the preset density, then the second noise is further determined to be in the low, mid-frequency range, high-frequency range, or full-frequency range.

[0131] If the adjusted thickness of the first material is greater than the preset thickness or the adjusted density of the first material is greater than the preset density, the current noise is determined to be in the low, mid, high frequency, or full frequency range.

[0132] While the current noise includes noise across the entire frequency range, the thickness and density of the second material are increased simultaneously.

[0133] When the current noise includes low and mid-frequency noise, increase the thickness of the second material.

[0134] When the frequency of the current noise is in the high-frequency range, increase the density of the second material.

[0135] Determine whether the parameters of the current noise meet the preset conditions.

[0136] If the current noise parameters meet the preset conditions, the process ends.

[0137] If the current noise parameters do not meet the preset conditions, continue to determine whether the current noise is in the low-frequency range, mid-frequency range, high-frequency range, or full-frequency range.

[0138] As can be seen, the above mainly introduces the solution provided by the embodiments of this application from the perspective of methodology.

[0139] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0140] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely illustrative descriptions of the application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

[0141] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An outdoor unit for an air conditioner, characterized in that, include: A housing, wherein a receiving cavity is provided inside the housing; The compressor is disposed within the receiving cavity; A noise reduction cover, which is placed around the compressor, is used to reduce the noise of the compressor. The noise reduction cover includes a first material layer and a second material layer; the first material layer is used to absorb a first noise, and the second material layer is used to isolate the first noise, which is the noise generated by the compressor. The density and thickness of the first material layer and the second material layer are matched with the noise parameters of the compressor so that the second noise emitted by the outdoor unit of the air conditioner meets the preset conditions. The noise parameters of the compressor include the frequency and amplitude of the first noise, and the second noise refers to the noise after the first noise is reduced by the noise reduction cover. The noise-reducing cover is obtained in the following way: An initial noise reduction shield is provided, the initial noise reduction shield comprising a first material layer and a second material layer; the first material layer is used to absorb the first noise, and the second material layer is used to isolate the first noise. The initial noise reduction cover is wrapped around the compressor, and the second noise is tested to obtain the noise parameters corresponding to the second noise. The second noise refers to the noise after the first noise is reduced by the initial noise reduction cover. The noise parameters corresponding to the second noise include the frequency and amplitude of the second noise. If the noise parameters corresponding to the second noise do not meet the preset conditions, one or more design parameters of the initial noise reduction cover are adjusted based on the predetermined correlation and the noise parameters corresponding to the second noise. The design parameters include the density of the first material layer, the thickness of the first material layer, the density of the second material layer, and the thickness of the second material layer. The correlation indicates the influence of each of the design parameters on the noise parameters corresponding to the second noise. The preset conditions include: the amplitude of the second noise in the first frequency range is less than or equal to the first preset amplitude; the amplitude of the second noise in the second frequency range is less than or equal to the second preset amplitude; and the amplitude of the second noise in the third frequency range is less than or equal to the third preset amplitude. Wherein, the frequency in the first frequency range is less than the frequency in the second frequency range, and the frequency in the second frequency range is less than the frequency in the third frequency range; the first preset amplitude is less than the second preset amplitude, and the second preset amplitude is less than the third preset amplitude.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The second material layer serves as the outer layer of the noise reduction cover, wrapping around the outside of the first material layer.

3. The outdoor unit of the air conditioner according to claim 1, characterized in that, The first material layer serves as the outer layer of the noise reduction cover, wrapping around the outside of the second material layer.

4. The outdoor unit of the air conditioner according to any one of claims 1-3, characterized in that, The first material layer comprises a porous material.

5. A design method for a noise-canceling cover, characterized in that, The noise reduction cover is used to reduce the primary noise generated by the compressor of the outdoor unit of the air conditioner; the method includes: An initial noise reduction shield is provided, the initial noise reduction shield comprising a first material layer and a second material layer; the first material layer is used to absorb the first noise, and the second material layer is used to isolate the first noise. The initial noise reduction cover is wrapped around the compressor, and the second noise is tested to obtain the noise parameters corresponding to the second noise. The second noise refers to the noise after the first noise is reduced by the initial noise reduction cover. The noise parameters corresponding to the second noise include the frequency and amplitude of the second noise. If the noise parameter corresponding to the second noise does not meet the preset conditions, one or more design parameters of the initial noise reduction cover are adjusted based on the predetermined correlation and the noise parameter corresponding to the second noise. The design parameters include the density of the first material layer, the thickness of the first material layer, the density of the second material layer, and the thickness of the second material layer. The correlation indicates the influence of each of the design parameters on the noise parameter corresponding to the second noise. The preset conditions include: the amplitude of the second noise in the first frequency range is less than or equal to the first preset amplitude; the amplitude of the second noise in the second frequency range is less than or equal to the second preset amplitude; and the amplitude of the second noise in the third frequency range is less than or equal to the third preset amplitude. Wherein, the frequency in the first frequency range is less than the frequency in the second frequency range, and the frequency in the second frequency range is less than the frequency in the third frequency range; the first preset amplitude is less than the second preset amplitude, and the second preset amplitude is less than the third preset amplitude.

6. The method according to claim 5, characterized in that, When the noise parameters corresponding to the second noise do not meet the preset conditions, based on a predetermined correlation and the noise parameters corresponding to the second noise, one or more design parameters of the initial noise reduction cover are adjusted, including: If the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, then the density of the first material layer is increased. If the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, then the thickness of the first material layer is increased.

7. The method according to claim 6, characterized in that, The adjusted thickness of the first material layer is less than or equal to the preset thickness, and the adjusted density of the first material layer is less than or equal to the preset density.

8. The method according to claim 5 or 6, characterized in that, When the noise parameters corresponding to the second noise do not meet the preset conditions, based on a predetermined correlation and the noise parameters corresponding to the second noise, one or more design parameters of the initial noise reduction cover are adjusted, including: If the amplitude of the second noise in the first frequency range is greater than the first preset amplitude, or the amplitude of the second noise in the second frequency range is greater than the second preset amplitude, then the thickness of the second material layer is increased. If the amplitude of the second noise in the third frequency range is greater than the third preset amplitude, then the density of the second material layer is increased.

9. An air conditioning system, characterized in that, include: The outdoor unit of the air conditioner as described in any one of claims 1-4; An indoor unit for air conditioning, which is connected to an outdoor unit for air conditioning via connecting pipes.

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