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 air conditioner outdoor unit and noise reduction cover

Technical Field

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

Background

At present, with the development of the scientific and technological level and the continuous improvement of the living standard of residents, the air conditioner has become an indispensable electrical appliance for every family, and the types of the outdoor unit of the air conditioner are also various.

However, the air conditioner often generates certain noise during the operation process, which affects the user experience, and the noise is mainly caused by the operation of the compressor in the outdoor unit of the air conditioner. In the related art, the compressor is usually enclosed by a sound insulation material, but the sound insulation material only can play a role in reducing noise generated by a small part of the compressor and cannot meet the noise reduction requirements of various air conditioning outdoor units.

Disclosure of Invention

The embodiment of the application provides an air conditioner outdoor unit and a design method of a noise reduction cover, wherein the density and the thickness of the material of the noise reduction cover in the outdoor unit are matched with the frequency and the amplitude of noise generated by a compressor, so that the noise reduction cover meets the noise reduction requirement 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 outdoor unit for an air conditioner 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.

The types of air-conditioning compressors include reciprocating piston compressors, rotary compressors, and scroll compressors, and the operation principles of the different types of compressors are different, and the noise generated during the operation is also different. For example, the reciprocating piston compressor is driven by a motor to move continuously, and a piston reciprocates up and down in a cylinder through a connecting rod, so that refrigeration cycle is realized; in the rotary compressor, a rotor in an air cylinder is driven by an eccentric shaft connected with a motor and rolls along the wall of the air cylinder in the air cylinder, so that the refrigeration cycle is realized. Due to the different composition and principle of different kinds of compressors, the frequency and amplitude of the generated noise are different, and the required noise reduction requirements are also different.

The density and the thickness of the first material layer and the second material layer of the noise reduction cover in the embodiment of the application are matched with the noise parameters of the compressor, so that the frequency and the amplitude of the noise emitted by the compressor after the noise reduction cover is covered on the compressor can meet the noise reduction requirement. Specifically, the frequency and the amplitude of noise emitted by the compressor are acquired after the initial noise reduction cover is covered on the compressor, and when the frequency and the amplitude of the noise do not meet the noise reduction requirement, the first material layer and the second material layer of the noise reduction cover are adjusted to ensure that the noise reduction cover meets the noise reduction requirement of the compressor.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects: because different types of compressors can generate noises with different frequencies or amplitudes during operation, the noise reduction cover matched with the frequency and the amplitude of the noise of the compressor is assembled for the compressor, the noise is reduced according to the actual condition of the compressor in a targeted manner, the noise reduction efficiency is improved, and the noise reduction effect is ensured. And the noise reduction cover is made of materials for absorbing noise and materials for isolating noise, so that the material cost is reduced, and the noise reduction efficiency is improved.

In some embodiments, the second material layer serves as an outer layer of the noise reduction cover and wraps the outer side of the first material layer.

Like this, the noise that can make the compressor send is after first material layer noise absorption, gives sound insulation through the second material layer again, not only can reach the noise reduction effect, because the density on second material layer is great moreover, therefore the second material layer still can provide good supporting role for falling the cover of making an uproar.

In some embodiments, the first material layer serves as an outer layer of the noise reduction cover and wraps the outer side of the second material layer.

Like this, the noise that can make the compressor send is after the second material layer gives sound insulation, carries out noise absorption again through first material layer to improve the effect of making an uproar.

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

Thus, when the noise passes through the plurality of pores made of the first material, the noise is converted into heat energy through friction with the plurality of pores, so that the sound wave of the noise is attenuated.

In a second aspect, an embodiment of the present application provides a method for designing a noise reduction cover, where the noise reduction cover is used for reducing noise of a first noise generated by a compressor of an outdoor unit of an air conditioner; the method comprises the following steps:

providing an initial noise reduction cover, wherein the initial noise reduction cover comprises a first material layer and a second material layer; the first material layer is used for absorbing first noise, and the second material layer is used for isolating the first noise;

wrapping the initial noise reduction cover outside the compressor, and testing second noise to obtain noise parameters corresponding to the second noise, wherein the second noise is the noise of the first noise after being subjected to noise reduction by the first noise reduction cover, and the noise parameters corresponding to the second noise comprise the frequency and the amplitude of the second noise;

and under the condition that the noise parameter corresponding to the second noise does not meet the preset condition, adjusting one or more design parameters of the initial noise reduction cover based on a predetermined correlation relationship and the noise parameter corresponding to the second noise, wherein the design parameters comprise 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 relationship indicates the influence rule of each design parameter on the noise parameter corresponding to the second noise.

According to the embodiment, the types of the air-conditioning compressors are various, and the frequency and amplitude of noise generated by different compressors in the operation process can be different, for example, the piston type compressor continuously moves under the driving of a motor, and the piston reciprocates up and down in the cylinder through the connecting rod, so that the refrigeration cycle is realized; in the rotary compressor, a rotor in an air cylinder is driven by an eccentric shaft connected with a motor and rolls along the wall of the air cylinder in the air cylinder, so that the refrigeration cycle is realized. Due to the different composition and principle of different kinds of compressors, the frequency and amplitude of the generated noise are different, and the required noise reduction requirements are also different. The noise reduction cover with a single specification cannot meet the noise reduction requirements of different types of compressors. Therefore, in the embodiment of the application, whether the initial noise reduction cover meets the noise reduction requirement of the compressor is judged by acquiring the noise parameter of the second noise after the initial noise reduction cover is covered and judging whether the initial noise reduction cover meets the preset condition or not. And because the density and the thickness of the first material layer and the second material layer in the noise reduction cover can influence the noise reduction effect, when the initial noise reduction cover does not meet the noise reduction requirement of the compressor, 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 of the noise reduction cover is adjusted until the noise reduction cover meets the noise reduction requirement of the compressor. Therefore, the noise reduction cover meeting the noise reduction requirement of the compressor can be designed aiming at different types of compressors, so that the noise of the compressor is prevented from influencing the use experience of users.

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

Therefore, whether the initial noise reduction cover meets the noise reduction requirement of the compressor or not can be judged according to preset conditions. And according to the frequency range of the second noise, the initial noise reduction cover is correspondingly adjusted by combining the influence rules of the density and the thickness of the first material layer and the second material layer on the noise frequency and the amplitude, so that the adjusted noise reduction cover meets the noise reduction requirement of the compressor.

In some embodiments, in the case that the noise parameter corresponding to the second noise does not satisfy the preset condition, adjusting 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 includes: if the amplitude of the second noise in the first frequency range is larger than a first preset amplitude, or the amplitude of the second noise in the second frequency range is larger than a second preset amplitude, increasing the density of the first material layer; and 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.

From the above-described embodiments, it is understood that the absorption capability for low and medium frequency noise (e.g., 0 to 1000 Hz) is increased when the density of the first material layer is increased. Thus, when the amplitude of the noise in the low frequency range (first frequency) is greater than the first predetermined amplitude or the amplitude of the noise in the mid frequency range (second frequency) is greater than the second predetermined amplitude, the amplitude of the noise in the low and mid frequency ranges can be reduced by increasing the density of the first material layer. Since the amplitude of the noise in the frequency range in which the first material layer can absorb noise can be reduced by increasing the thickness of the first material layer, the amplitude of the noise in the high frequency range (third frequency) can be reduced by increasing the thickness of the first material layer.

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

It can be seen from the above embodiments that increasing the density or thickness of the first material layer can effectively reduce the amplitude in the low and medium frequency ranges, but as the density or thickness of the first material layer increases, the material cost increases, but the efficiency of absorbing noise decreases. In contrast, the density of the adjusted first material layer is controlled not to be greater than the preset density and the thickness of the adjusted first material layer is controlled not to be greater than the preset thickness, so that the noise absorption efficiency can be ensured while the material cost is considered.

In some embodiments, in the case that the noise parameter corresponding to the second noise does not satisfy the preset condition, adjusting 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 includes: if the amplitude of the second noise in the first frequency range is larger than a first preset amplitude, or the amplitude of the second noise in the second frequency range is larger than a second preset amplitude, increasing the thickness of the second material layer; and if the amplitude of the second noise in the third frequency range is greater than a third preset amplitude, increasing the density of the second material layer.

As can be seen from the above-described embodiments, when the thickness of the second material layer is increased, the sound insulating ability against noise in the low and medium frequency ranges (for example, 0 to 1000 Hz) is increased. Therefore, when the amplitude of the noise in the low frequency range (first frequency) is greater than the first preset amplitude or the amplitude of the noise in the intermediate frequency range (second frequency) is greater than the second preset amplitude, the amplitude of the noise in the low and intermediate frequency ranges can be reduced by increasing the thickness of the second material layer. Since the increase of the density of the second material layer can reduce the amplitude of the noise in the soundproofing frequency range of the second material layer, the noise in the high frequency range (third frequency) can be reduced by increasing the density of the second material layer.

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

an outdoor unit of an air conditioner provided in the first aspect;

and the air-conditioning indoor unit is connected with the air-conditioning outdoor unit through a connecting pipe.

The beneficial effects described in various aspects of the present application may be referred to each other, and are not described herein again.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an outdoor unit of an air conditioner according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of another outdoor unit of an air conditioner according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a noise reduction hood provided in an embodiment of the present application;

fig. 5 is a schematic structural view of another outdoor unit of an air conditioner according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of another outdoor unit of an air conditioner according to an embodiment of the present disclosure;

FIG. 7 is a schematic flow chart illustrating a method for designing a noise reduction mask according to an embodiment of the present disclosure;

FIG. 8 is a schematic flow chart of another noise reduction cover design method provided by an embodiment of the present application;

FIG. 9 is a schematic flow chart of another noise reduction cover design method provided by an embodiment of the present application;

fig. 10 is a schematic flowchart of a method for designing a noise reduction cover according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

In the description of the embodiments of the present application, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. In addition, when a pipeline is described, the terms "connected" and "connected" are used in this application to have a meaning of conducting. The specific meaning is to be understood in conjunction with the context.

The terms "comprising" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Furthermore, in the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, words such as "exemplary" or "e.g.," are intended to present relevant concepts in a concrete fashion.

The air conditioner often can send certain noise in the operation process, influences user's use experience, and above-mentioned noise is mainly caused by the compressor operation in the air condensing units. Because the compressor in the outdoor unit of air conditioner is various, for example, the double piston compressor is driven by the motor to move continuously, and the piston reciprocates up and down in the cylinder through the connecting rod, thereby realizing refrigeration cycle; in the rotary compressor, a rotor in an air cylinder is driven by an eccentric shaft connected with a motor and rolls along the wall of the air cylinder in the air cylinder, so that the refrigeration cycle is realized. Due to the different composition and principle of different kinds of compressors, the frequency and amplitude of the generated noise are different, and the required noise reduction requirements are also different. Therefore, the noise reduction cover with a single specification cannot meet the noise reduction requirements of different types of compressors.

In view of this, the present disclosure provides an outdoor unit of an air conditioner and an air conditioning system including the outdoor unit of the air conditioner, where the outdoor unit of the air conditioner includes a noise reduction cover matched to a noise parameter of a compressor, and the noise reduction cover enables the compressor to meet a noise reduction requirement.

Wherein, the air conditioning system that this application embodiment provided can be for window type air conditioning system, split type wall-hanging air conditioning system, split type clothes air conditioning system, ceiling type air conditioning system, embedded air conditioning system, central air conditioning system or on-vehicle air conditioning system, and this application embodiment does not do any restriction to this.

To further describe the technical solution of the embodiment of the present application, taking a split type wall-mounted air conditioning system as an example, as shown in fig. 1, an air conditioning system 11 shown in fig. 1 may include: indoor unit 100, outdoor unit 200, connection pipe 300, and remote controller 400

In some embodiments, the indoor unit 100 is typically mounted on an interior wall surface, such as a split wall air conditioning system.

In some embodiments, the outdoor unit 200 is generally installed outdoors for heat exchange in an indoor environment. In the illustration of fig. 1, the outdoor unit 200 is indicated by a broken line because the outdoor unit 200 is located outdoors on the opposite side of the indoor unit 100 with respect to the wall surface.

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 casing 201 may be approximately rectangular as shown in fig. 1, or may have other shapes to accommodate and protect electrical components inside the outdoor unit 200.

In some embodiments, the discharge of the compressor 202 is connected to the outdoor heat exchanger 207 through a four-way reversing valve 204 for powering the refrigerant cycle. One or more different frequencies and amplitudes of noise may be generated during operation of compressor 202.

In some embodiments, the noise reduction cap 203 includes a noise reduction cap 2031 and a noise reduction cap 2032. The noise reduction cover 2032 is wrapped around the compressor 202, and the noise reduction cap 2031 is covered on the noise reduction cover 2032.

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

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

The first material layer 2033 is used for absorbing noise generated by the compressor 202.

Illustratively, the first material layer 2033 comprises a sound absorbing material.

Optionally, the first material layer 2033 is made of a porous material, so that when noise passes through the plurality of pores of the first material layer 2033, the noise is converted into heat energy by friction with the plurality of pores, thereby attenuating sound waves of the noise.

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

Illustratively, the second material layer 2034 is a sound insulating material.

From a large number of experimental results, it is found that when the density of the sound-absorbing material is merely changed, the frequency range of noise that can be absorbed by the sound-absorbing material is decreased, that is, the absorption capability of low and medium frequency (for example, 0 to 1000 Hz) noise is increased, but the amplitude of noise in the frequency range that can be absorbed is not significantly changed by increasing the density of the sound-absorbing material; if the thickness of the sound absorbing material is merely changed, the amplitude of the second noise absorbed by the sound absorbing material can be reduced while the frequency range of the second noise absorbed by the sound absorbing material is not significantly changed by increasing the thickness of the sound absorbing material; if the density of the sound-insulating material is only used as a variable, the density of the sound-insulating material is increased, the frequency range of the sound-insulating material capable of insulating sound is not obviously changed, but the amplitude of the noise in the frequency range of the sound-insulating material capable of insulating sound can be reduced; if the thickness of the sound-insulating material is merely varied, increasing the thickness of the sound-insulating material decreases the frequency range of the second noise that can be insulated by the sound-insulating material, i.e., increases the sound-insulating ability against low and medium frequency (e.g., 0 to 1000 Hz) noises, but does not significantly change the amplitude in the frequency range of the second noise that can be insulated. Therefore, the noise reduction cover provided by the embodiment of the application can adjust the density and the thickness of the sound absorbing material and the sound insulating material, and can improve the noise reduction effect while saving the cost.

Optionally, as shown in fig. 5, the second material layer 2034 is used as an outer layer of the noise reduction cover 203 and wraps the outer side of the first material layer 2033.

Optionally, as shown in fig. 6, the first material layer 2033 is used as an outer layer of the noise reduction cover 203 and wraps the outer side of the second material layer 2034.

In some embodiments, the outdoor unit 200 may further include: four-way reversing valve, fan, throttling arrangement and outdoor heat exchanger.

In some embodiments, the four-way reversing valve has four ports respectively connected to the discharge port of the compressor 202, the indoor heat exchanger, the suction port of the compressor 202 and the outdoor heat exchanger, and is used for switching between the cooling mode and the heating mode by changing the flow direction of the refrigerant in the system pipeline.

In some embodiments, a fan is disposed in the outdoor unit 200 to generate an airflow for the outdoor air near the outdoor heat exchanger to promote heat exchange between the refrigerant flowing through the heat transfer pipes of the outdoor heat exchanger and the outdoor air.

Optionally, the outdoor unit 200 further includes a fan motor, and the fan motor is connected to the fan and used for driving or changing the rotation speed of the fan.

In some embodiments, the throttling device is disposed in the outdoor unit 200, and is used for expanding the refrigerant flowing through the throttling device to achieve a decompression effect, and adjusting the refrigerant flow rate of the refrigerant passage. Alternatively, the restriction device may be an electronic expansion valve.

In some embodiments, the outdoor heat exchanger is disposed in the outdoor unit 200 to exchange heat between the refrigerant flowing through the heat transfer tubes of the outdoor heat exchanger and the outdoor air.

In some embodiments, the connection pipe 300 is connected between the indoor unit 100 and the outdoor unit 200 to form a refrigerant circuit in which a refrigerant circulates.

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

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

As shown in fig. 7, the present application provides a method of designing a noise reduction cover, the method comprising the steps of:

s1, providing an initial noise reduction cover.

The initial noise reduction cover comprises a first material layer and a second material layer; the first material layer is used for absorbing first noise, and the second material layer is used for isolating the first noise. Wherein, the first noise is the noise that the compressor produced.

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

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

The second noise is noise of the first noise after being denoised by the first denoising cover, and the noise parameters corresponding to the second noise comprise 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 cap can be obtained.

And S3, under the condition that the noise parameter corresponding to the second noise does not meet the preset condition, adjusting one or more design parameters of the initial noise reduction cover based on the predetermined correlation relation and the noise parameter corresponding to the second noise.

The design parameters comprise 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 rule of influence of each design parameter on the noise parameter corresponding to the second noise. Therefore, the design parameters of the initial noise reduction cover can be adjusted according to the influence rule of the density and the thickness of the sound absorbing material or the sound insulating material on the noise frequency and the amplitude, so that the adjusted noise reduction cover meets the noise reduction requirement of the compressor.

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

Illustratively, the preset conditions include: when the frequency of the second noise is less than or equal to 0Hz and less than 400Hz, the amplitude of the second noise is less than or equal to 55dBA; when the frequency of the second noise is less than or equal to 400Hz and less than 1000Hz, the amplitude of the second noise is less than or equal to 57.5dBA; when the frequency of the second noise is more than or equal to 1000Hz, the amplitude of the second noise is less than or equal to 60dBA.

Therefore, whether the initial noise reduction cover meets the noise reduction requirement of the compressor or not can be judged according to preset conditions. And correspondingly adjusting the initial noise reduction cover according to the frequency range of the second noise so that the adjusted noise reduction cover meets the noise reduction requirement of the compressor.

The embodiment shown in fig. 7 brings at least the following advantages: because the types of the air-conditioning compressors are various, the frequency and amplitude of noise generated by different compressors in the operation process can be different, for example, the piston type compressor continuously moves under the driving of a motor, and a piston reciprocates up and down in a cylinder through a connecting rod, so that the refrigeration cycle is realized; in the rotary compressor, a rotor in an air cylinder is driven by an eccentric shaft connected with a motor and rolls along the wall of the air cylinder in the air cylinder, so that the refrigeration cycle is realized. Due to the different composition and principle of different kinds of compressors, the frequency and amplitude of the generated noise are different, and the required noise reduction requirements are also different. The noise reduction cover with a single specification cannot meet the noise reduction requirements of different types of compressors. Therefore, in the embodiment of the application, whether the initial noise reduction cover meets the noise reduction requirement of the compressor is judged by acquiring the noise parameter of the second noise after the initial noise reduction cover is covered and judging whether the initial noise reduction cover meets the preset condition or not. And when the initial noise reduction cover does not meet the noise reduction requirement of the compressor, 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 of the noise reduction cover is adjusted until the noise reduction cover meets the noise reduction requirement of the compressor. Therefore, the noise reduction cover meeting the noise reduction requirement of the compressor can be designed aiming at different types of compressors, so that the noise of the compressor is prevented from influencing the use experience of users.

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 larger than a first preset amplitude, or the amplitude of the second noise in the second frequency range is larger than a second preset amplitude, the density of the first material layer is increased.

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

From the above-described embodiments, it is understood that the absorption capability for low and medium frequency noise (e.g., 0 to 1000 Hz) is increased when the density of the first material layer is increased. Therefore, when the amplitudes of the noises in the low and medium frequency ranges are larger than the corresponding preset amplitudes, the amplitudes of the noises in the low and medium frequency ranges can be reduced by increasing the density of the first material layer.

In some embodiments, the adjusted density of the first material layer is less than or equal to the predetermined density. Illustratively, the predetermined density is 2g/cm ³ 。

It can be seen from the above embodiments that increasing the density of the first material layer can effectively reduce the amplitude in the low and medium frequency ranges, but as the density of the first material layer increases, the material cost increases, but the efficiency of absorbing noise decreases. In contrast, the density of the adjusted first material layer is controlled not to be larger than the preset density, so that the noise absorption efficiency can be ensured while the material cost is considered.

And S312, if the amplitude of the second noise in the third frequency range is larger than a third preset amplitude, increasing the thickness of the first material layer.

Illustratively, the third frequency range is above 1000Hz and the third predetermined magnitude is 60dBA.

In the above embodiments, increasing the thickness of the first material layer can reduce the amplitude of the noise in the frequency range in which the first material layer can absorb the noise, so that the amplitude of the noise in the high frequency range can be reduced by increasing the thickness of the first material layer.

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

It can be seen from the above embodiments that increasing the thickness of the first material layer can effectively reduce the amplitude of the first material layer in the frequency range that can be absorbed, but as the thickness of the first material layer increases, the material cost increases, but the efficiency of absorbing noise decreases. Therefore, the adjusted thickness of the first material layer is controlled not to be larger than the preset thickness, and the noise absorption efficiency can be ensured while the material cost is considered.

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 predetermined amplitude, the second predetermined amplitude, and the third predetermined amplitude, respectively, the thickness and the density of the first material layer are increased simultaneously to ensure that the noise reduction requirement of the compressor is satisfied.

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

S313, if the amplitude of the second noise in the first frequency range is larger than a first preset amplitude, or the amplitude of the second noise in the second frequency range is larger than a second preset amplitude, the thickness of the second material layer is increased.

As can be seen from the above-described embodiments, when the thickness of the second material layer is increased, the sound insulating ability against low and medium frequency noise (for example, 0 to 1000 Hz) is increased. Therefore, when the amplitudes of the noises in the low and medium frequency ranges are larger than the corresponding preset amplitudes, the amplitudes of the noises in the low and medium frequency ranges can be reduced by increasing the thickness of the second material layer.

And S314, if the amplitude of the second noise in the third frequency range is larger than a third preset amplitude, increasing the density of the second material layer.

It can be seen from the above embodiments that increasing the density of the second material layer can reduce the amplitude of the noise in the frequency range in which the second material layer can insulate sound, and therefore, for the 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.

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

Known from the above-mentioned embodiment, from the cost of material, on the difficult degree of processing, on the effect of occupied space and noise reduction, change the density and the thickness on first material layer for the design scheme of priority, consequently, after adjusting the density and the thickness on first material layer, when the second noise still does not satisfy the preset condition, adjust the density and the thickness on second material layer again, when guaranteeing the effect of making an uproar, practice thrift the cost, make the design of making an uproar cover of making an uproar more reasonable.

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 predetermined amplitude, the second predetermined amplitude, and the third predetermined amplitude, respectively, the thickness and the density of the second material layer are increased at the same time to ensure that the noise reduction requirement of the compressor is satisfied.

The whole process of the noise reduction cover design method is specifically described below with reference to fig. 10.

The process is started.

And covering an initial noise reduction cover on the compressor, and acquiring parameters of second noise.

And judging whether the parameter of the second noise meets a preset condition or not.

And when the parameter of the second noise meets the preset condition, ending the process.

And when the parameter of the second noise does not meet the preset condition, judging that the second noise is in a low or medium frequency range or a high frequency range or a full frequency range.

When the second noise comprises noise in the full frequency range, the thickness and the density of the first material are increased simultaneously.

When the second noise comprises low and medium frequency noise, the density of the first material is increased.

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

And judging whether the parameter of the second noise after the first material is adjusted meets a preset condition.

And if the parameter of the second noise after the first material is adjusted meets the preset condition, ending the process.

And if the parameter of the second noise does not meet the preset condition, judging whether the thickness of the adjusted first material is smaller than or equal to the preset thickness and whether the density of the adjusted first material is smaller than or equal to the preset density.

And if the thickness of the adjusted first material is smaller than or equal to the preset thickness and the thickness of the adjusted first material is smaller than or equal to the preset density, continuously judging that the second noise is in a low-frequency range, a medium-frequency range, a high-frequency range or a full-frequency range.

If the thickness of the first material after the adjustment is greater than and predetermines thickness or the density of the first material after the adjustment is greater than and predetermines density, judge that current noise is in low, intermediate frequency range or high frequency range or full frequency range.

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

When the current noise comprises low and medium frequency noise, the thickness of the second material is increased.

And when the frequency of the current noise is in a high-frequency range, increasing the density of the second material.

And judging whether the parameters of the current noise meet preset conditions or not.

And if the parameters of the current noise meet the preset conditions, ending the process.

And if the parameters of the current noise do not meet the preset conditions, continuously judging that the current noise is in a low or medium frequency range or a high frequency range or a full frequency range.

It can be seen that the foregoing describes the solution provided by the embodiments of the present application primarily from a methodological perspective.

While the present application is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "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 a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations may be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An outdoor unit of an air conditioner, comprising:

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 second noise emitted by the outdoor unit of the air conditioner meets a 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 subjected to noise reduction by the noise reduction cover.

2. The outdoor unit of claim 1, wherein the second material layer is used as an outer layer of the noise reduction cover and wraps the outside of the first material layer.

3. The outdoor unit of claim 1, wherein the first material layer is used as an outer layer of the noise reduction cover and wraps an outer side of the second material layer.

4. The outdoor unit of any one of claims 1 to 3, wherein the first material layer comprises a porous material.

5. The design method of the noise reduction cover is characterized in that the noise reduction cover is used for reducing noise of first noise generated by a compressor of an air conditioner outdoor unit; the method comprises the following steps:

providing an initial noise reduction cap comprising a first material layer and a second material layer; the first material layer is used for absorbing the first noise, and the second material layer is used for isolating the first noise;

wrapping the initial noise reduction cover outside the compressor, and testing second noise to obtain noise parameters corresponding to the second noise, wherein the second noise is noise of the first noise subjected to noise reduction by the first noise reduction cover, and the noise parameters corresponding to the second noise comprise frequency and amplitude of the second noise;

and under the condition that the noise parameter corresponding to the second noise does not meet the preset condition, adjusting one or more design parameters of the initial noise reduction cover based on a predetermined correlation relationship and the noise parameter corresponding to the second noise, wherein the design parameters comprise 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 relationship indicates the rule of influence of each design parameter on the noise parameter corresponding to the second noise.

6. The method according to claim 5, wherein the preset conditions include: the amplitude of the second noise in the first frequency range is smaller than or equal to the first preset amplitude; the amplitude of the second noise in the second frequency range is smaller than or equal to the second preset amplitude, and the amplitude of the second noise in the third frequency range is smaller than or equal to the third preset amplitude;

wherein frequencies in the first frequency range are less than frequencies in the second frequency range, which are less than frequencies in the third frequency range; the first preset amplitude is smaller than the second preset amplitude, and the second preset amplitude is smaller than the third preset amplitude.

7. The method according to claim 6, wherein in the case that the noise parameter corresponding to the second noise does not satisfy the preset condition, adjusting 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 comprises:

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, increasing the density of the first material layer;

and 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 of claim 7, wherein the adjusted thickness of the first material layer is less than or equal to a predetermined thickness, and the adjusted density of the first material layer is less than or equal to a predetermined density.

9. The method according to claim 6 or 7, wherein in the case that the noise parameter corresponding to the second noise does not satisfy the preset condition, adjusting 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 comprises:

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, increasing the thickness of the second material layer;

and if the amplitude of the second noise in the third frequency range is greater than a third preset amplitude, increasing the density of the second material layer.

10. An air conditioning system, comprising:

the outdoor unit of any one of claims 1 to 4;

and the air conditioner indoor unit is connected with the air conditioner outdoor unit through a connecting pipe.

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