CN115823659A - Design method of air conditioner outdoor unit and noise reduction cover - Google Patents

Abstract

The application provides a design method of an air conditioner outdoor unit and a noise reduction cover, and particularly relates to the technical field of air conditioners. This air condensing units includes: the shell is internally provided with an accommodating cavity; the compressor is arranged in the accommodating cavity; the noise reduction cover is wrapped outside the compressor and used for reducing noise of the compressor; the noise reduction cover comprises a first material layer and a second material layer; the first material layer is used for absorbing first noise, the second material layer is used for isolating the first noise, and the first noise is noise generated by the compressor; the density and the 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 condition, the noise parameters of the compressor comprise the frequency and the amplitude of the first noise, and the second noise refers to the noise of the first noise after the noise of the noise reduction cover is reduced.

Description

Design method of an air conditioner outdoor unit and noise reduction cover

technical field

The present application relates to the technical field of air conditioning, and in particular to a design method for an outdoor unit of an air conditioner and a noise reduction cover.

Background technique

At present, with the development of science and technology and the continuous improvement of residents' living standards, air conditioners have become an indispensable electrical equipment for every household, and there are various types of air conditioner outdoor units.

However, the air conditioner often emits certain noise during operation, which affects user experience, and the above noise is mainly caused by the operation of the compressor in the outdoor unit of the air conditioner. In this regard, in related technologies, the compressor is usually enclosed and wrapped with sound-insulating materials, but it can only play a role in the noise generated by a small part of the compressor, and cannot meet the noise reduction requirements of various air-conditioning outdoor units. .

Contents of the invention

The embodiment of the present application provides a design method for an outdoor unit of an air conditioner and a noise reduction cover. The density and thickness of the material of the noise reduction cover in the outdoor unit match the frequency and amplitude of the noise generated by the compressor, so that the noise reduction cover Meet the noise reduction requirements of the compressor.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, an air conditioner outdoor unit is provided, and the air conditioner outdoor unit includes:

A casing, the casing is provided with an accommodating cavity;

The compressor is arranged in the containing chamber;

Noise reduction cover, wrapped around the compressor, 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 the first noise, and the second material layer is used to isolate the first noise, and the first noise is the noise generated by the compressor;

Wherein, 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 satisfies the preset condition, and the noise parameters of the compressor include the noise parameters of the first noise. Frequency and amplitude, the second noise refers to the noise after the first noise is reduced by the noise reduction cover.

The types of air conditioner compressors include reciprocating piston compressors, rotary compressors and scroll compressors. Different types of compressors have different operating principles and generate different noises during operation. For example, the double-piston compressor moves continuously under the drive of the motor, and the piston reciprocates up and down in the cylinder through the connecting rod, thereby realizing the refrigeration cycle; in the rotary compressor, the rotor in the cylinder is driven by the eccentric shaft connected to the motor , rolling along the cylinder wall in the cylinder to realize the refrigeration cycle. Due to the different composition and principle of different types of compressors, the frequency and amplitude of noise generated are different, and the required noise reduction requirements are also different.

The density and thickness of the first material layer and the second material layer of the noise reduction cover in the embodiment of the present application are matched with the noise parameters of the compressor, which can make the frequency of the noise emitted by the compressor after the noise reduction cover is installed and amplitude meet the noise reduction requirements. Specifically, after the initial noise reduction cover is placed on the compressor, the frequency and amplitude of the noise emitted by the compressor are obtained. When the frequency and amplitude of the above noise do not meet the noise reduction requirements, the first material layer of the noise reduction cover Adjust with the second material layer to ensure that the noise reduction cover meets the noise reduction requirements of the compressor.

The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects: Since different types of compressors generate noises of different frequencies or amplitudes during operation, the compressors are equipped with The noise reduction cover realizes targeted noise reduction according to the actual situation of the compressor, improves the efficiency of noise reduction, and ensures the effect of noise reduction. Moreover, the noise reduction cover is composed of materials for absorbing noise and materials for isolating noise, which not only reduces material costs, but also improves the efficiency of noise reduction.

In some embodiments, the second material layer is used as an outer layer of the noise reduction cover, wrapped around the outside of the first material layer.

In this way, the noise from the compressor can be absorbed by the first material layer and then sound-insulated by the second material layer, which can not only achieve the noise reduction effect, but also because the second material layer has a higher density, the second material layer Layers also provide good support for the noise reduction cover.

In some embodiments, the first material layer is used as the outer layer of the noise reduction cover and is wrapped around the outside of the second material layer.

In this way, the noise emitted by the compressor can be absorbed by the first material layer after being sound-proofed by the second material layer, thereby improving the effect of noise reduction.

In some embodiments, the first material layer includes a porous material.

In this way, when the 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 wave of the noise.

In the second aspect, the embodiment of the present application provides a design method of a noise reduction cover, which is used to reduce the first noise generated by the compressor of the outdoor unit of the air conditioner; the method includes:

An initial noise reduction cover is provided, and 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;

Wrap the initial noise reduction cover around the compressor, test the second noise, and 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 second noise The corresponding noise parameters include the frequency and amplitude of the second noise;

When the noise parameter corresponding to the second noise does not meet the preset condition, based on the predetermined correlation and the noise parameter corresponding to the second noise, one or more design parameters of the initial noise reduction cover are adjusted, and the design parameters include the first The correlation relationship between 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 indicates how each design parameter influences the noise parameter corresponding to the second noise.

It can be seen from the above embodiments that since there are various types of air-conditioning compressors, the frequency and amplitude of the noise generated by different compressors may be different during operation. For example, the double piston compressor moves continuously under the drive of the motor, The piston reciprocates up and down in the cylinder through the connecting rod, thus realizing the refrigeration cycle; in the rotary compressor, the rotor in the cylinder is driven by the eccentric shaft connected to the motor, and rolls along the cylinder wall in the cylinder, thereby realizing the refrigeration cycle . Due to the different composition and principle of different types of compressors, the frequency and amplitude of noise generated are different, and the required noise reduction requirements are also different. A noise reduction cover of a single specification cannot meet the noise reduction requirements of different types of compressors. In this regard, the embodiment of the present application first obtains the noise parameters of the second noise after the initial noise reduction cover is installed, and judges whether the initial noise reduction cover meets the noise reduction requirements of the compressor according to whether the above noise parameters meet the preset conditions. And because the density and thickness of the first material layer and the second material layer in the noise reduction cover can affect the effect of noise reduction, therefore, when the initial noise reduction cover does not meet the noise reduction requirements of the compressor, the noise reduction cover One or more of 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 are adjusted until the noise reduction cover meets the noise reduction requirements of the compressor. In this way, it is possible to design noise reduction covers meeting the noise reduction requirements for different types of compressors, thereby preventing the noise of the compressors from affecting user experience.

In some embodiments, the preset condition includes: the magnitude of the second noise in the first frequency range is less than or equal to the first preset magnitude; the magnitude of the second noise in the second frequency range is less than or equal to the second Preset amplitude, 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 The frequency is less than the frequency within 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.

In this way, it can be judged according to the preset condition whether the initial noise reduction cover meets the noise reduction requirement of the compressor. And according to the frequency range of the second noise, combined with the influence of the density and thickness of the first material layer and the second material layer on the noise frequency and amplitude, the initial noise reduction cover is adjusted accordingly, so that the adjusted noise reduction The noise cover meets the noise reduction requirements of this compressor.

In some embodiments, when the noise parameter corresponding to the second noise does not meet the preset condition, one or more items of the initial noise reduction mask are adjusted based on the predetermined correlation relationship and the noise parameter corresponding to the second noise. Design parameters, 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 increasing the second A density of the material layer; 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.

It can be known from the above-mentioned embodiments that when the density of the first material layer increases, the ability to absorb low and medium frequency noise (eg, 0-1000 Hz) increases. Therefore, when the magnitude of the noise in the low frequency range (first frequency) is greater than the first preset magnitude or the noise magnitude in the middle frequency range (second frequency) is greater than the second preset magnitude, you can increase the The density of the first texture layer, so that the amplitude of the noise in the low and mid frequency range is reduced. And because increasing the thickness of the first material layer can reduce the amplitude in the frequency range of the first material layer that can absorb noise, therefore, for the noise in the high frequency range (the third frequency), it is possible to increase the thickness of the first material layer , so that the amplitude of the noise in the high frequency range is reduced.

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

It can be seen from the above examples that increasing the density or thickness of the first material layer can effectively reduce the amplitude in the low and intermediate frequency range, but as the density or thickness of the first material layer increases, the cost of the material will increase, but the noise-absorbing Efficiency will drop. In this regard, controlling the adjusted density of the first material layer to be not greater than the preset density and the adjusted thickness of the first material layer to be not greater than the preset thickness can ensure the efficiency of absorbing noise while considering the material cost.

In some embodiments, when the noise parameter corresponding to the second noise does not meet the preset condition, one or more items of the initial noise reduction mask are adjusted based on the predetermined correlation relationship and the noise parameter corresponding to the second noise. Design parameters, 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 increasing the second The thickness of the second material layer; 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.

It can be seen from the above-mentioned embodiments that the sound insulation capability of the noise in the low and middle frequency range (for example, 0-1000 Hz) increases when the thickness of the second material layer is increased. Therefore, when the magnitude of the noise in the low frequency range (first frequency) is greater than the first preset magnitude or the noise magnitude in the middle frequency range (second frequency) is greater than the second preset magnitude, you can increase the The thickness of the second material layer, so that the amplitude of the noise in the low and mid frequency range is reduced. And because increasing the density of the second material layer can reduce the amplitude of the second material layer in the frequency range of sound insulation, therefore, for the noise in the high frequency range (the third frequency), the density of the second material layer can be increased to Reduces the amplitude of noise in the high frequency range.

In a third aspect, the embodiment of the present application provides an air conditioning system, the air conditioning system comprising:

The air conditioner outdoor unit provided in the first aspect;

The air conditioner indoor unit is connected to the air conditioner outdoor unit through connecting pipes.

The beneficial effects described in various aspects in this application can be referred to each other, and will not be repeated here.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present invention, and constitute a part of the description, and are used together with the embodiments of the application to explain the technical solution of the present invention, and do not constitute a limitation to the technical solution of the present invention.

Fig. 1 is a schematic structural diagram of an air conditioning system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an air conditioner outdoor unit provided in an embodiment of the present application;

Fig. 3 is a schematic structural diagram of another air conditioner outdoor unit provided by the embodiment of the present application;

Fig. 4 is a schematic cross-sectional view of a noise reduction cover provided by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of another air conditioner outdoor unit provided by the embodiment of the present application;

Fig. 6 is a schematic structural diagram of another air conditioner outdoor unit provided by the embodiment of the present application;

FIG. 7 is a schematic flowchart of a method for designing a noise reduction cover provided by an embodiment of the present application;

Fig. 8 is a schematic flowchart of another noise reduction cover design method provided by the embodiment of the present application;

Fig. 9 is a schematic flowchart of another noise reduction cover design method provided by the embodiment of the present application;

FIG. 10 is a schematic flow chart of a noise reduction cover design method provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations.

In the description of the embodiments of this application, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or integrally connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations. In addition, when describing pipelines, "connected" and "connected" used in this application have the meaning of conducting. The specific meaning needs to be understood in conjunction with the context.

The terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include other unlisted steps or units, or may optionally also include Other steps or elements inherent to the process, method, product or apparatus are included.

In addition, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, words such as "exemplary" or "such as" are intended to present related concepts in a concrete manner.

The air conditioner often emits a certain amount of noise during operation, which affects user experience, and the above noise is mainly caused by the operation of the compressor in the outdoor unit of the air conditioner. Due to the various types of compressors in the outdoor unit of the air conditioner, for example, the double-piston compressor moves continuously under the drive of the motor, and the piston reciprocates up and down in the cylinder through the connecting rod, thereby realizing the refrigeration cycle; , the rotor in the cylinder is driven by the eccentric shaft connected with the motor, and rolls along the cylinder wall in the cylinder, thus realizing the refrigeration cycle. Due to the different composition and principle of different types of compressors, the frequency and amplitude of noise generated are different, and the required noise reduction requirements are also different. Therefore, a noise reduction cover of a single specification cannot meet the noise reduction requirements of different types of compressors.

In view of this, the embodiment of the present application firstly provides an air conditioner outdoor unit and an air conditioning system including the air conditioner outdoor unit, the air conditioner outdoor unit includes a noise reduction cover that matches the noise parameters of the compressor, and the compressor is made Meet noise reduction requirements.

Among them, the air conditioning system provided in the embodiment of the present application may be a window air conditioning system, a split wall-mounted air conditioning system, a split cabinet air conditioning system, a ceiling air conditioning system, an embedded air conditioning system, a central air conditioning system or a vehicle air conditioning system. The embodiment does not impose any limitation on this.

To further describe the technical solution of the embodiment of the present application, take the split-type wall-mounted air-conditioning system as an example, as shown in Figure 1, which is a schematic diagram of the mechanical structure of an air-conditioning system provided by the embodiment of the application, the air-conditioning system shown in Figure 1 The system 11 may include: an indoor unit 100 , an outdoor unit 200 , connecting pipes 300 and a remote controller 400

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

In some embodiments, the outdoor unit 200 is usually set outdoors for heat exchange in an indoor environment. In addition, in FIG. 1 , since the outdoor unit 200 is located outdoors on the opposite side to the indoor unit 100 across a wall surface, the outdoor unit 200 is indicated by a dotted line.

In some embodiments, as shown in FIG. 2 , the outdoor unit 200 may include a casing 201 , a compressor 202 and a noise reduction cover 203 .

In some embodiments, the housing 201 may be approximately a rectangular parallelepiped as shown in FIG. 1 , or may be in other shapes, and is used to accommodate and protect electrical components in the outdoor unit 200 .

In some embodiments, the exhaust port of the compressor 202 is connected with the outdoor heat exchanger 207 through the four-way reversing valve 204 to provide power for the refrigerant cycle. One or more noises of different frequencies and amplitudes may be generated during operation of the compressor 202 .

In some embodiments, the noise reduction cover 203 includes a noise reduction cover 2031 and a noise reduction cover 2032 . Wherein, the noise reduction cover 2032 is wrapped around the compressor 202 , and the noise reduction cover 2031 is disposed above the noise reduction cover 2032 .

In some embodiments, as shown in FIG. 3 , the noise reduction cover 203 is wrapped around the compressor 202 for noise reduction of the compressor 202 .

In some embodiments, as shown in FIG. 4 , the noise reduction cover 203 includes a first material layer 2033 and a second material layer 2034 .

Wherein, the first material layer 2033 is used to absorb the noise generated by the compressor 202 .

Exemplarily, the first material layer 2033 includes sound-absorbing material.

Optionally, the first material layer 2033 is a porous material, so that when the 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 wave of the noise.

The second material layer 2034 is used to isolate the noise generated by the compressor 202 , and the second material layer can achieve the purpose of sound insulation by attenuating the penetrating ability of the noise.

Exemplarily, the second material layer 2034 is a sound-insulating material.

According to a large number of experimental results, if only the density of the sound-absorbing material is used as a variable, the density of the sound-absorbing material increases, and the frequency range of noise that the sound-absorbing material can absorb decreases, that is, the ability to absorb low and medium frequency (for example, 0-1000Hz) noise increases. , but there is no significant change in the amplitude of the noise within the absorbable frequency range; if only the thickness of the sound-absorbing material is used as a variable, increasing the thickness of the sound-absorbing material will not significantly change the frequency range of the second noise that the sound-absorbing material can absorb. However, the amplitude in the frequency range of the second noise that can be absorbed by the sound-absorbing material can be reduced; if only the density of the sound-insulating material is used as a variable, and the density of the sound-insulating material is increased, the frequency range that the sound-insulating material can insulate will not change significantly, but it can Reduce the amplitude of the noise in the frequency range where the soundproofing material can insulate; if only the thickness of the soundproofing material is used as a variable, increasing the thickness of the soundproofing material will decrease the frequency range of the second noise that can be soundproofed by the soundproofing material, that is, for low, The soundproofing capability of intermediate frequency (eg, 0-1000 Hz) noise is increased, but there is no significant change in the amplitude of the second noise that can be soundproofed in the frequency range. Therefore, the noise reduction cover provided by the embodiment of the present application adjusts the density and thickness of the sound absorbing material and the sound insulating material, which can improve the noise reduction effect while saving costs.

Optionally, as shown in FIG. 5 , the second material layer 2034 serves as the outer layer of the noise reduction cover 203 and is wrapped on the outside of the first material layer 2033 .

Optionally, as shown in FIG. 6 , the first material layer 2033 serves as the outer layer of the noise reduction cover 203 and is wrapped on the outside of the second material layer 2034 .

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.

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. The flow direction in the system pipeline is used to realize the mutual conversion between cooling mode and heating mode.

In some embodiments, the fan is arranged in the outdoor unit 200, and is used to generate air flow in the outdoor air near the outdoor heat exchanger, so as to promote the heat exchange between the refrigerant flowing in the heat transfer tube of the outdoor heat exchanger and the outdoor air. .

Optionally, the outdoor unit 200 further includes a fan motor, which is connected to the fan and used to drive or change the speed of the fan.

In some embodiments, the throttling device is disposed in the outdoor unit 200, and is used to expand the refrigerant flowing through the throttling device to achieve the effect of decompression, and is used to adjust the flow rate of the refrigerant in the refrigerant passage. Optionally, the throttling device may be an electronic expansion valve.

In some embodiments, the outdoor heat exchanger is arranged in the outdoor unit 200 for heat exchange between the refrigerant flowing in the heat transfer pipe of the outdoor heat exchanger and the outdoor air.

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

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

The following describes the embodiments of the present application in detail in conjunction with the accompanying drawings.

As shown in Figure 7, the present application provides a method for designing a noise reduction cover, which method includes the following steps:

S1. Provide an initial noise reduction cover.

Wherein, 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. Wherein, the first noise is the noise generated by the compressor.

Exemplarily, the first material layer is a sound-absorbing material, and the second material layer is a sound-insulating material.

S2. Wrap the initial noise reduction cover outside the compressor, test the second noise, and obtain the noise parameters corresponding to the second noise.

Wherein, the second noise refers to the noise after the first noise is denoised by the first noise reduction cover, and 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 of the noise reduction cover can be obtained.

S3. When the noise parameter corresponding to the second noise does not satisfy the preset condition, adjust one or more design parameters of the initial noise reduction cover based on the predetermined correlation and the noise parameter corresponding to the second noise.

Among them, 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, and the correlation indicates the influence of each design parameter on the noise parameter corresponding to the second noise law. In this way, the design parameters of the initial noise reduction cover can be adjusted according to the influence of the density and thickness of the sound-absorbing or sound-insulating material on the noise frequency and amplitude, so that the adjusted noise reduction cover can meet the noise reduction requirements of the compressor .

In some embodiments, the preset condition includes: the magnitude of the second noise in the first frequency range is less than or equal to the first preset magnitude; the magnitude of the second noise in the second frequency range is less than or equal to the second The preset amplitude, 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 smaller than the frequency in the second frequency range, and the frequency in the second frequency range is smaller than the frequency in the third frequency range; the first preset amplitude is smaller than the second preset amplitude, and the second The preset amplitude is smaller than the third preset amplitude.

Exemplarily, the preset conditions include: when 0Hz≤the frequency of the second noise<400Hz, the amplitude of the second noise≤55dBA; when 400Hz≤the frequency of the second noise<1000Hz, the amplitude of the second noise ≤57.5dBA; when the frequency of the second noise is ≥1000Hz, the amplitude of the second noise is ≤60dBA.

In this way, it can be judged according to the preset condition whether the initial noise reduction cover meets the noise reduction requirement of the compressor. And according to the frequency range where the second noise is located, corresponding adjustments are made to the initial noise reduction cover, so that the adjusted noise reduction cover meets the noise reduction requirements of the compressor.

The embodiment shown in Fig. 7 brings at least the following beneficial effects: due to the various types of air-conditioning compressors, the frequency and amplitude of the noise generated by different compressors during operation may be different, for example, the double-piston compressor Driven by the motor, it moves continuously, and the piston reciprocates up and down in the cylinder through the connecting rod, thereby realizing the refrigeration cycle; in the rotary compressor, the rotor in the cylinder is driven by the eccentric shaft connected to the motor, and moves along the cylinder in the cylinder. The wall rolls to achieve a refrigeration cycle. Due to the different composition and principle of different types of compressors, the frequency and amplitude of noise generated are different, and the required noise reduction requirements are also different. A noise reduction cover of a single specification cannot meet the noise reduction requirements of different types of compressors. In this regard, the embodiment of the present application first obtains the noise parameters of the second noise after the initial noise reduction cover is installed, and judges whether the initial noise reduction cover meets the noise reduction requirements of the compressor according to whether the above noise parameters meet the preset conditions. And because the density and thickness of the first material layer and the second material layer in the noise reduction cover can affect the effect of noise reduction, therefore, when the initial noise reduction cover does not meet the noise reduction requirements of the compressor, the noise reduction cover One or more of 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 are adjusted until the noise reduction cover meets the noise reduction requirements of the compressor. In this way, noise reduction covers meeting the noise reduction requirements of different types of compressors can be designed, thereby preventing the noise of the compressors from affecting user experience.

In some embodiments, as shown in FIG. 8, step S3 may include steps S311-S312.

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, add the first material layer Density.

Exemplarily, the first frequency range is 0-400 Hz, and the first preset amplitude is 55 dBA; the second frequency range is 400-1000 Hz, and the second preset amplitude is 57.5 Hz.

It can be known from the above-mentioned embodiments that when the density of the first material layer increases, the ability to absorb low and medium frequency noise (eg, 0-1000 Hz) increases. Therefore, when the amplitude of the noise in the low and intermediate frequency range is greater than the corresponding preset amplitude, the density of the first material layer can be increased to reduce the amplitude of the noise in the low and intermediate frequency range.

In some embodiments, the adjusted density of the first material layer is less than or equal to a preset density. Exemplarily, the preset density is 2g/cm ³ .

It can be known from the above embodiments that increasing the density of the first material layer can effectively reduce the amplitude in the low and intermediate frequency ranges, but with the increase of the density of the first material layer, the cost of materials will increase, but the efficiency of absorbing noise will decrease. In this regard, controlling the adjusted density of the first material layer to not be greater than the preset density can ensure the efficiency of absorbing noise while considering the material cost.

S312. If the magnitude of the second noise in the third frequency range is greater than a third preset magnitude, increase the thickness of the first material layer.

Exemplarily, the third frequency range is above 1000 Hz, and the third preset amplitude is 60 dBA.

It can be seen from the above embodiments that increasing the thickness of the first material layer can reduce the amplitude of the first material layer in the frequency range of absorbable noise. Therefore, for noise in the high frequency range, the thickness of the first material layer can be increased to reduce Reduces the amplitude of noise in the high frequency range.

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

It can be seen from the above examples that increasing the thickness of the first material layer can effectively reduce the amplitude in the frequency range that the first material layer can absorb, but as the thickness of the first material layer increases, the cost of the material will increase, but the noise absorption efficiency will drop. In this regard, controlling the adjusted thickness of the first material layer to not be greater than the preset thickness can ensure the efficiency of absorbing noise while considering the cost of materials.

In some embodiments, if the amplitude values in the first frequency range, the second frequency range and the third frequency range are respectively greater than the first preset amplitude value, the second preset amplitude value and the third preset amplitude value, then simultaneously The thickness and density of the first material layer are increased to meet the noise reduction requirements of the compressor.

In some embodiments, as shown in FIG. 9 , step S3 may further include steps S313-S314.

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, add a second material layer thickness of.

It can be seen from the above-mentioned embodiments that when the thickness of the second material layer increases, the sound-insulating capability of low- and medium-frequency noises (for example, 0-1000 Hz) increases. Therefore, when the amplitude of the noise in the low and intermediate frequency range is greater than the corresponding preset amplitude, the thickness of the second material layer can be increased to reduce the amplitude of the noise in the low and intermediate frequency range.

S314. If the magnitude of the second noise in the third frequency range is greater than a third preset magnitude, increase the density of the second material layer.

It can be known from the above embodiments that increasing the density of the second material layer can reduce the amplitude of the second material layer in the frequency range of sound insulation. Therefore, for noise in the high frequency range, it is possible to increase the density of the second material layer so that The amplitude of noise in the high frequency range is reduced.

In some embodiments, the density and thickness of the second material layer are adjusted only when the second noise still does not meet the preset condition after the density and thickness of the first material layer are adjusted.

It can be seen from the above embodiments that changing the density and thickness of the first material layer is a priority design solution in terms of the cost of materials, the ease of processing, the occupied space, and the effect of reducing noise. After adjusting the density and thickness of the first material layer, if the second noise still does not meet the preset conditions, then adjust the density and thickness of the second material layer to save costs while ensuring the noise reduction effect, making the noise reduction cover The design is more reasonable.

In some embodiments, if the amplitude values in the first frequency range, the second frequency range and the third frequency range are respectively greater than the first preset amplitude value, the second preset amplitude value and the third preset amplitude value, then simultaneously The thickness and density of the second material layer are increased to meet the noise reduction requirements of the compressor.

The complete process of the noise reduction cover design method will be described in detail below in conjunction with FIG. 10 .

Start the process.

An initial noise reduction cover is placed on the compressor, and the parameters of the second noise are obtained.

It is judged whether the parameter of the second noise satisfies the preset condition.

When the parameter of the second noise satisfies the preset condition, the process ends.

When the parameter of the second noise does not satisfy the preset condition, it is judged that the second noise is in the low-frequency range, the middle-frequency range or the high-frequency range or the full-frequency range.

When the second noise includes the noise of the whole frequency range, the thickness and density of the first material are increased at the same time.

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

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

It is judged whether the parameter of the second noise after adjusting the first material satisfies the preset condition.

If the parameter of the second noise after adjusting the first material satisfies the preset condition, the process ends.

If the parameter of the second noise does not satisfy the preset condition, it is judged whether the adjusted thickness of the first material is less than or equal to the preset thickness and whether the adjusted density of the first material is less than or equal to the preset density.

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, continue to judge whether the second noise is in the low, middle frequency range, high frequency range or full frequency range .

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, it is judged that the current noise is in the low-frequency range, the middle-frequency range or the high-frequency range or the full-frequency range.

When the current noise includes the noise of the full frequency range, increase the thickness and density of the second material at the same time.

When the current noise includes low and medium frequency noise, increase the thickness of the second material.

Increases the density of the second material when the frequency of the current noise is in the high frequency range.

Determine whether the parameters of the current noise meet the preset conditions.

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

If the parameters of the current noise do not meet the preset conditions, continue to judge whether the current noise is in the low-frequency range, the middle-frequency range or the high-frequency range or the full-frequency range.

It can be seen that the foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods.

Although the present application is described in conjunction with various embodiments here, however, in the process of implementing the claimed application, those skilled in the art can understand and realize the disclosed implementation by viewing the drawings, the disclosure, and the appended claims. Other changes to the example. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application should be covered within the protection scope of the application . Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. An air conditioner outdoor unit, characterized in that it comprises: A casing, the casing is provided with an accommodating cavity; a compressor, arranged in the accommodating cavity; a noise reduction cover, wrapped around the compressor, for noise reduction 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 the first noise, and the second material layer is used to isolate the first noise, and the first noise is the noise produced by said compressor; Wherein, the density and thickness of the first material layer and the second material layer match the noise parameters of the compressor, so that the second noise emitted by the outdoor unit of the air conditioner satisfies a preset condition, and the 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. 2 . The air conditioner outdoor unit according to claim 1 , wherein the second material layer is used as an outer layer of the noise reduction cover and is wrapped around the outer side of the first material layer. 3 . 3 . The outdoor unit of an air conditioner according to claim 1 , wherein the first material layer serves as an outer layer of the noise reduction cover and is wrapped around the outer side of the second material layer. 4 . 4. The air conditioner outdoor unit according to any one of claims 1-3, wherein the first material layer comprises a porous material. 5. A method for designing a noise reduction cover, characterized in that the noise reduction cover is used to reduce the first noise generated by the compressor of the outdoor unit of the air conditioner; the method includes: An initial noise reduction cover is provided, 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 material layer a noise; Wrap the initial noise reduction cover outside the compressor, test the second noise, and obtain the noise parameters corresponding to the second noise, the second noise means that the first noise is reduced by the first noise reduction Mask the noise after noise reduction, and the noise parameters corresponding to the second noise include the frequency and amplitude of the second noise; When the noise parameter corresponding to the second noise does not meet the preset condition, based on the predetermined correlation and the noise parameter corresponding to the second noise, adjust one or more designs of the initial noise reduction mask parameters, 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, and the correlation indicates that each The law of the influence of the design parameters on the noise parameters corresponding to the second noise. 6. The method according to claim 5, wherein the preset condition comprises: the amplitude of the second noise in the first frequency range is less than or equal to the first preset amplitude; the 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 Set 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 less than the second preset amplitude, the second preset amplitude is smaller than the third preset amplitude. 7. The method according to claim 6, wherein when the noise parameter corresponding to the second noise does not satisfy a preset condition, based on a predetermined correlation relationship and the noise parameter corresponding to the second noise Noise parameters, adjusting one or more design parameters of the initial noise reduction cover, 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 If the amplitude is set, the density of the first material layer is increased; If the amplitude of the second noise in the third frequency range is greater than a third preset amplitude, increasing the thickness of the first material layer. 8. The method according to claim 7, wherein the adjusted thickness of the first material layer is less than or equal to a preset thickness, and the adjusted density of the first material layer is less than or equal to a preset density . 9. The method according to claim 6 or 7, wherein when the noise parameter corresponding to the second noise does not satisfy a preset condition, based on a predetermined correlation relationship and the second noise Corresponding noise parameters, adjusting one or more design parameters of the initial noise reduction cover, 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 If the amplitude is set, the thickness of the second material layer is increased; If the magnitude of the second noise in the third frequency range is greater than a third preset magnitude, increasing the density of the second material layer. 10. An air conditioning system, characterized in that it comprises: The air conditioner outdoor unit according to any one of claims 1-4; An air-conditioning indoor unit connected to the air-conditioning outdoor unit through a connecting pipe.

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