CN116538758A - Refrigerator and noise reduction method thereof - Google Patents

Abstract

The invention discloses a refrigerator and a noise reduction method thereof, which are characterized in that a noise parameter value detected by a noise parameter detection device is obtained by responding to a low-noise operation instruction, so as to determine a noise parameter frequency band with the largest noise contribution value as a target frequency band; when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, the silencer is controlled to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition, so that the refrigerator can quickly and accurately reduce noise, the refrigerating effect of the refrigerator is not affected, and the user experience is improved.

Description

Refrigerator and noise reduction method thereof

Technical Field

The invention relates to the technical field of refrigerators, in particular to a refrigerator and a refrigerator noise reduction method.

Background

With the progress of technology and the development of economy, refrigerators are widely applied to life of people, and the refrigerators generate larger noise during operation, so that user experience is affected. Current products typically use a means of reducing the rotational speed of the fan or compressor to reduce noise, which is detrimental to the refrigeration of the refrigerator.

Disclosure of Invention

The embodiment of the invention aims to provide a refrigerator and a refrigerator noise reduction method, which realize quick and accurate noise reduction of the refrigerator without influencing the refrigerating effect of the refrigerator by firstly determining the frequency band with the largest contribution value in noise parameter values and then correspondingly adjusting the noise elimination parameters of a sound eliminator.

To achieve the above object, an embodiment of the present invention provides a refrigerator including:

the muffler is arranged in the refrigerator and used for reducing noise of the refrigerator, and the noise elimination parameter of the muffler is adjustable;

the noise parameter detection device is arranged on the refrigerator and is used for detecting noise parameter values;

a controller for:

responding to a low-noise operation instruction, and determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device to serve as a target frequency band;

when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition.

As an improvement of the scheme, the refrigerator further comprises a complete machine noise parameter detection device which is arranged on the refrigerator and used for detecting complete machine noise parameter values;

The noise parameter detection device is an air duct noise parameter detection device and is arranged on an air duct of the refrigerator, and the noise parameter value is an air duct noise parameter value;

the controller is further configured to:

after the noise elimination parameters are adjusted, if the current whole noise parameter value detected by the whole noise parameter detection device is smaller than or equal to a preset target whole noise parameter value, recording the current noise elimination parameters of the muffler and the current rotating speed of a fan of the refrigerator, and establishing a corresponding relation between the noise elimination parameters and the rotating speed of the fan;

after the noise elimination parameters are adjusted, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, and the noise elimination parameters of the muffler are adjusted again.

As an improvement of the above, the refrigerator further includes:

a refrigerant circuit for sequentially circulating a refrigerant through a compressor, a condenser, a pressure reducer, and an evaporator, for providing cold energy to a storage chamber of a refrigerator;

the bottom cooling fan is arranged near the condenser and used for radiating heat for the condenser;

the fan is a storage room fan and is used for sending the cold energy into the storage room;

The controller is further configured to:

after the noise elimination parameters are adjusted, before the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the bottom cooling fan is adjusted downwards by a preset bottom cooling step length until the current whole machine noise parameter value is smaller than or equal to the target whole machine noise parameter value, or the refrigerator energy consumption does not meet a preset low energy consumption condition; the preset low energy consumption condition is that the energy consumption of the refrigerator after the rotation speed of the bottom cooling fan is adjusted downwards is smaller than or equal to the energy consumption of the refrigerator before the rotation speed of the bottom cooling fan is adjusted downwards;

and when the energy consumption of the refrigerator does not meet the preset low energy consumption condition, controlling the bottom cooling fan to increase the rotating speed by the preset bottom cooling step length.

As an improvement of the scheme, the muffler is a microperforated panel muffler, the noise elimination parameter is cavity depth, and the noise parameter value is noise value, vibration acceleration or sound quality;

the controller is further configured to:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the microperforated panel muffler to gradually increase the cavity depth by a first preset step length until a preset adjustment ending condition is met;

And when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the microperforated panel silencer to gradually reduce the cavity depth by the first preset step length until the preset adjustment ending condition is met.

As an improvement of the scheme, the silencer is a film acoustic metamaterial silencer, the silencing parameter is film tension, and the noise parameter value is a noise value, vibration acceleration or sound quality;

the controller is further configured to:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the film acoustic metamaterial muffler to gradually increase film tension by a second preset step length until a preset adjustment ending condition is met;

and when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the film acoustic metamaterial muffler to gradually reduce film tension by the second preset step length until the preset adjustment ending condition is met.

As an improvement of the above solution, the preset adjustment end condition is:

the noise parameter reduction amount of the current target frequency band is larger than or equal to the preset target reduction amount;

or the noise parameter reduction amount of the current target frequency band is smaller than the preset target reduction amount, larger than the noise parameter reduction amount of the left adjacent frequency band and larger than the noise parameter reduction amount of the right adjacent frequency band;

The noise parameter reduction amount of the current target frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the target frequency band, the noise parameter reduction amount of the left adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the left adjacent frequency band, and the noise parameter reduction amount of the right adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the right adjacent frequency band.

As an improvement of the above solution, the controller is further configured to:

setting noise parameter test values of different frequency bands;

aiming at the noise parameter test value of each frequency band, carrying out noise elimination parameter adjustment on the muffler, screening noise elimination parameters with the minimum noise parameter test value after the muffler eliminates noise, and establishing a corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band;

and acquiring the current silencing parameter of the silencer, and determining the current optimal silencing frequency band based on the corresponding relation between the silencing parameter and the optimal silencing frequency band.

As an improvement of the above solution, the controller is further configured to:

And when the current optimal silencing frequency range is matched with the target frequency, controlling the silencer to keep the current silencing parameters.

As an improvement of the above scheme, the whole noise parameter detection device is a whole noise sensor, the whole noise parameter value is a whole noise value, and the target whole noise parameter value is a target whole noise value;

the controller is further configured to:

after the refrigerator is restarted, aiming at the corresponding relation between each noise elimination parameter and the rotating speed of the fan, when the real-time whole machine noise value detected by the whole machine noise sensor is larger than the target whole machine noise value, the corresponding relation between the noise elimination parameters and the rotating speed of the fan is adjusted

In order to achieve the above object, an embodiment of the present invention further provides a method for noise reduction in a refrigerator, including:

determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device, and taking the noise parameter frequency band as a target frequency band; wherein the noise parameter detection device is arranged on the refrigerator,

when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition; wherein, the silencer is arranged in the refrigerator.

Compared with the prior art, the refrigerator and the refrigerator noise reduction method disclosed by the embodiment of the invention acquire the noise parameter value detected by the noise parameter detection device by responding to the low-noise operation instruction so as to determine the noise parameter frequency band with the largest noise contribution value as a target frequency band; when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition. Therefore, according to the embodiment of the invention, the noise reduction of the refrigerator can be realized rapidly and accurately by determining the frequency band with the largest contribution value in the noise parameter value and then correspondingly adjusting the noise elimination parameter of the muffler, the refrigerating effect of the refrigerator is not influenced, and the user experience is improved.

Drawings

Fig. 1 is a perspective view of a refrigerator provided by an embodiment of the present invention;

fig. 2 is a perspective view of a refrigerator door according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;

fig. 4 is a schematic flow diagram of a refrigerant during refrigeration according to an embodiment of the present invention;

FIG. 5 is a schematic view of air flow during refrigeration according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

FIG. 7 is a first workflow diagram of a controller provided by an embodiment of the present invention;

fig. 8 is a schematic diagram of a waveform of a noise value of a refrigerator according to an embodiment of the present invention;

FIG. 9 is a second workflow diagram of a controller provided by an embodiment of the present invention;

FIG. 10 is a third workflow diagram of a controller provided by an embodiment of the present invention;

fig. 11 is a flowchart of a refrigerator noise reduction method provided in an embodiment of the present invention.

100 parts of a box body, 200 parts of a door body, 210 parts of a door body outer shell, 220 parts of a door body inner container, 230 parts of an upper end cover, 240 parts of a lower end cover; 1. the device comprises a compressor, a condenser, a condensing prevention pipe, a drying filter, a pressure reducer, a evaporator, a gas-liquid separator and a gas-liquid separator, wherein the compressor, the condenser, the condensing prevention pipe and the condensing prevention pipe are respectively arranged at the bottom of the compressor, the condensing prevention pipe and the condensing prevention pipe respectively; 11. refrigerating chamber, 12, freezing chamber, 13, air duct, 14, fan, 300, refrigerator, 400, cloud server, 500, router, 600, client.

Detailed Description

In the description of the present application, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, fig. 1 is a perspective view of a refrigerator according to an embodiment of the present invention, the refrigerator according to the present embodiment has an approximately rectangular parallelepiped shape, the refrigerator including a cabinet 100 defining a storage space and a plurality of door bodies 200 provided at openings of the cabinet 100, wherein, referring to fig. 2, the door bodies 200 include a door body case 210 positioned at an outer side of the cabinet 100, a door body case 220 positioned at an inner side of the cabinet 100, an upper end cap 230, a lower end cap 240, and a heat insulation layer positioned between the door body case 210, the door body case 220, the upper end cap 230, and the lower end cap 240; typically, the insulating layer is filled with a foaming material. The case 100 is provided with a chamber, wherein the chamber includes a component storage chamber for storing components in the refrigerator, such as a compressor, a fan, etc., and a storage space for storing food and medicine, etc., and a muffler (not shown in the figure) with adjustable noise elimination parameters is further disposed in the component storage chamber, and noise reduction effects of different noise elimination parameters on noise of different frequency bands are not completely the same. The refrigerator in the embodiment of the invention comprises a refrigerating system, referring to a schematic structural diagram of the refrigerating system shown in fig. 3, wherein the refrigerating system is arranged in a component storage cavity and comprises a compressor, an evaporator, a pressure reducer and a condenser, the refrigerating system is actually a refrigerant loop, the refrigerant loop sequentially circulates refrigerant through the compressor, the condenser, the pressure reducer and the evaporator and is used for providing cold energy for a storage chamber of the refrigerator, and the compressor is used for providing power for a refrigerating cycle of the refrigerator; the storage space may be partitioned into a plurality of storage compartments, which may be configured as a refrigerating compartment, a freezing compartment, a temperature changing compartment (also referred to as a fresh food compartment) according to the purpose. Each storage compartment corresponds to one or more doors, for example, in fig. 1, the upper storage compartment is provided with a double door. The door body can be pivoted at the opening of the box body and can also be opened in a drawer mode, so that drawer type storage is realized.

Further, the refrigerator is also provided with noise parameter detecting means (not shown in the drawings) for detecting the noise parameter value of the refrigerator.

Referring to fig. 3, fig. 3 is a schematic view showing a structure of a refrigerating system in a refrigerator according to an embodiment of the present invention, the refrigerating system including a compressor 1, a condenser 2, an anti-condensation pipe 3, a dry filter 4, a pressure reducer 5, an evaporator 6, and a gas-liquid separator 7. The working processes of the refrigeration system comprise a compression process, a condensation process, a throttling process and an evaporation process.

Wherein, in connection with fig. 3, the compression process is: when the power line of the refrigerator is inserted and the contact of the temperature controller is connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 1, compressed into high-temperature and high-pressure overheat gas in the cylinder of the compressor 1 and then discharged to the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas radiates heat through the condenser 2, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated steam, the saturated steam is further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as condensing temperature, and the pressure of the refrigerant in the whole condensing process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid is filtered by a dry filter 4 to remove moisture and impurities, and then flows into a pressure reducer 5 (such as a capillary tube), throttling and depressurization are carried out through the pressure reducer, and the refrigerant is changed into normal-temperature and low-pressure wet vapor; the evaporation process is as follows: the wet vapor with normal temperature and low pressure starts to absorb heat in the evaporator 6 to vaporize, so that the temperature of the evaporator and the surrounding temperature are reduced, the refrigerant is changed into low-temperature and low-pressure gas, the refrigerant coming out of the evaporator 6 returns to the compressor 1 again after passing through the gas-liquid separator 7, the process is repeated, the heat in the refrigerator is transferred into the air outside the refrigerator, the purpose of refrigeration is achieved, and the flow direction of the refrigerant can be shown in fig. 4.

Referring to fig. 5, the refrigerator further includes a fan 14, which is disposed in an air duct 13 of the refrigerator, and the fan 14 is operated to make air continuously enter the fins of the evaporator 6 to perform heat exchange, and simultaneously send the air cooled after heat absorption of the evaporator 6 to the refrigerating chamber 11 and the freezing chamber 12 through the air duct 13, and achieve the purpose of reducing temperature by using the air opening corresponding to the storage chamber to realize continuous circulation flow of air in the storage chamber; the refrigerating air port arranged on the inner wall of the refrigerating chamber comprises a refrigerating air return port and a refrigerating air supply port, and is used for forming cold air circulation to provide cold energy for the refrigerating chamber, and the freezing chamber is also provided with a freezing air port (a freezing air supply port and a freezing air return port) in the same way. When the fan rotates, air flow is generated, cold energy generated by the evaporator is blown to the air supply port along with the air flow by the fan, enters a storage chamber corresponding to the air supply port, provides cold energy for the storage chamber, and air in the storage chamber is extruded out and flows out from the corresponding air outlet and is brought back to the evaporator for heat exchange, so that primary air flow circulation is completed.

Specifically, in an embodiment of the present invention, the refrigerator further includes a controller for: responding to a low-noise operation instruction, and determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device to serve as a target frequency band; when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition.

It should be noted that, the noise reduction method provided by the embodiment of the invention is suitable for the noise reduction requirements of any mode of the refrigerator, such as the operation modes of defrosting recovery period, first power-on, stable operation and the like, and according to the noise related attributes of different modes, the noise reduction method provided by the embodiment of the invention is adopted in different operation modes, and then the noise reduction parameters of the corresponding muffler in each operation mode can be obtained. Therefore, the operation mode of the refrigerator is not limited herein.

For example, the low noise operation command may be preset, and the low noise operation command is automatically triggered in a preset night time period, such as eight pm to eight am, or a noise reduction button is set on the refrigerator, the low noise operation command is triggered by an input button signal, or the low noise operation command is triggered by a touch screen signal input on a display screen of the refrigerator, and may also be input through a client, referring to fig. 6, fig. 6 is a schematic structural diagram of a communication system provided in an embodiment of the present invention, and the refrigerator 300 establishes a data connection with the client 600 through the router 500 or the cloud server 400. When the refrigerator 300 and the client 600 communicate through the router 500, the refrigerator 300 and the client 600 are closely spaced, and a user can input a low noise operation instruction through the client 600 in a living room or a room. When the refrigerator 300 and the client 600 communicate through the cloud server 400, the refrigerator 300 and the client 600 are far apart, and a user can perform data interaction with the refrigerator 300 through an APP installed in the client 600, and meanwhile, remote control of the refrigerator 300 can be realized. As can be seen, there are various ways of triggering the low noise operation instruction, and the method is not limited herein.

Referring to fig. 7, fig. 7 is a first workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S11 to S15:

and S11, responding to a low-noise operation instruction, determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device to serve as a target frequency band, and then entering step S12.

Specifically, the frequency of noise generated by the refrigerator is not single, frequency bands with larger noise contribution values exist, the running conditions of devices such as fans and the like are different under different running modes of the refrigerator, the frequency bands with the largest noise contribution values are also different, the noise parameter frequency band with the largest contribution values is determined as a target frequency band through contribution analysis on the noise parameter values, and the target frequency band is used for guiding the subsequent adjustment of noise elimination parameters of a muffler so as to realize the rapid and accurate reduction of the noise of the refrigerator.

S12, judging whether the acquired current optimal silencing frequency band of the silencer is matched with the target frequency band, if so, entering a step S13, and if not, entering a step S15.

S13, controlling the muffler to adjust the noise elimination parameters in a preset step size, and then entering step S14.

Specifically, the silencing effects of the silencer on noises of different frequency bands are different and depend on silencing parameters of the silencer, so that the current optimal silencing frequency band of the silencer is obtained to be compared with the target frequency band, if the current silencing effect of the silencer is not optimal, the silencing parameters of the silencer are adjusted to optimize the silencing effect of the silencer.

It should be noted that, the specific value of the preset step is set by the manufacturer according to the actual situation, which is not limited herein.

S14, judging whether the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition, if so, entering a step S15, and if not, returning to the step S13.

Specifically, the one-round adjustment of the noise elimination parameter of the muffler often includes multiple adjustments, after each adjustment, the noise reduction effect of the noise elimination parameter of the muffler on the noise parameter of the target frequency band needs to be evaluated, if the noise reduction amount of the noise parameter value in the target frequency band meets the preset adjustment end condition, it is indicated that the noise elimination parameter of the muffler has reached a better level on the noise reduction effect of the refrigerator, if the noise reduction amount of the noise parameter value in the target frequency band does not meet the preset adjustment end condition, it is indicated that the noise reduction effect of the noise elimination parameter of the muffler on the refrigerator has not reached the expected noise reduction effect, and therefore, the step S13 is returned to again adjust the noise elimination parameter of the muffler.

S15, controlling the muffler to maintain the current noise elimination parameters.

Specifically, if the noise parameter reduction amount of the noise parameter value in the target frequency band meets the preset adjustment end condition, it is indicated that the noise reduction effect of the muffler on the refrigerator has reached the expected noise reduction effect, so that the muffler is controlled to maintain the current noise reduction parameter so as to reduce the noise of the refrigerator.

Compared with the prior art, the embodiment of the invention can determine the noise parameter frequency band with the largest noise contribution value as the target frequency band by analyzing the noise parameter value, compare the target frequency band with the current optimal noise elimination frequency band of the muffler, and control the muffler to adjust the noise elimination parameter with the preset step length when the comparison result is unmatched until the noise parameter reduction amount of the noise parameter value in the target frequency band meets the preset adjustment ending condition, so that the noise elimination parameter is adjusted in a targeted manner, the adjustment direction of the muffler can be clarified, the aim of quickly and accurately reducing noise is achieved, the refrigerating effect of the refrigerator is not influenced, and the user experience is improved.

In one embodiment, the controller is further configured to: the noise parameter detection device is an air duct noise parameter detection device and is arranged on an air duct of the refrigerator, and the noise parameter value is an air duct noise parameter value;

Specifically, referring to fig. 8, fig. 8 is a schematic waveform diagram of a noise value of a refrigerator according to an embodiment of the present invention, where an abscissa is time, an ordinate is a noise value, two curves exist in the diagram, an upper curve is a noise value of a whole machine, a lower curve is a noise value of a single fan, the noise value of the single fan is about 32.55dB, and the noise value of the whole machine is 36.99dB, so that it is seen that the noise ratio of the fan is very large.

In one embodiment, the refrigerator further comprises a complete machine noise parameter detection device, which is arranged on the refrigerator and used for detecting complete machine noise parameter values; the controller is further configured to: after the noise elimination parameters are adjusted, if the current whole noise parameter value detected by the whole noise parameter detection device is smaller than or equal to a preset target whole noise parameter value, recording the current noise elimination parameters of the muffler and the current rotating speed of a fan of the refrigerator, and establishing a corresponding relation between the noise elimination parameters and the rotating speed of the fan; after the noise elimination parameters are adjusted, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, and the noise elimination parameters of the muffler are adjusted again.

Specifically, after the fan noise is subjected to targeted noise elimination, the whole machine noise of the refrigerator is analyzed, if the current whole machine noise parameter value of the refrigerator is smaller than or equal to a preset target whole machine noise parameter value, the whole noise reduction effect of the refrigerator is indicated to reach the expected effect, so that the noise elimination parameters and the fan rotating speed obtained after adjustment can be recorded, and a corresponding relation is established for subsequent noise reduction treatment; if the current whole machine noise parameter value of the refrigerator is larger than the target whole machine noise parameter value, the current rotating speed of the fan is excessively large, and even if the noise elimination parameter of the muffler is matched and adjusted to optimize the noise elimination effect, the noise reduction requirement of a user is difficult to reach, so that the rotating speed of the fan is adjusted downwards at the moment, and the noise elimination parameter of the muffler is readjusted until the whole machine noise parameter value is smaller than or equal to the target whole machine noise parameter value.

Referring to fig. 9, fig. 9 is a second workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S16 to S22:

s16, responding to a low-noise operation instruction, determining a noise parameter frequency band with the largest noise contribution value according to the air duct noise parameter value to serve as a target frequency band, and then entering step S17.

And S17, judging whether the acquired current optimal silencing frequency band of the silencer is matched with the target frequency band, if so, entering a step S20, and if not, entering a step S18.

S18, controlling the muffler to adjust the noise elimination parameters in a first preset step size, and then entering step S19.

It should be noted that, the specific value of the first preset step is set by the manufacturer according to the actual situation, which is not limited herein.

And S19, judging whether the noise parameter reduction amount of the air channel noise parameter value in the target frequency band meets a preset adjustment ending condition, if so, entering a step S20, and if not, returning to the step S18.

S20, judging whether the current whole noise parameter value detected by the whole noise parameter detection device is smaller than or equal to a preset target whole noise parameter value, if so, entering a step S21, and if not, entering a step S22.

It should be noted that, the specific value of the noise parameter value of the target whole machine is set by the manufacturer according to the actual situation, which is not limited herein.

S21, recording the current silencing parameter of the silencer and the current rotating speed of a fan of the refrigerator, and establishing a corresponding relation between the silencing parameter and the rotating speed of the fan.

S22, the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, and the silencing parameters of the silencer are readjusted.

It should be noted that, the specific value of the preset rotation speed reduction amount is set by the manufacturer according to the actual situation, and is not limited herein.

In the embodiment of the invention, the noise reduction effect of the noise generated by the fan is improved by adjusting the noise reduction parameters of the muffler, and the noise reduction parameter adjustment is carried out again in a fan speed reduction mode when the noise reduction effect cannot reach the expected value, so that the low noise control and the refrigeration effect can be considered as much as possible, and the influence on the refrigeration effect of the refrigerator is reduced.

In one embodiment, the refrigerator further includes a bottom cooling fan (not shown) disposed near the condenser for cooling the condenser; the fan is a storage room fan and is used for sending the cold energy into the storage room; the controller is further configured to: after the noise elimination parameters are adjusted, before the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the bottom cooling fan is adjusted downwards by a preset bottom cooling step length until the current whole machine noise parameter value is smaller than or equal to the target whole machine noise parameter value, or the refrigerator energy consumption does not meet a preset low energy consumption condition; the preset low energy consumption condition is that the energy consumption of the refrigerator after the rotation speed of the bottom cooling fan is adjusted downwards is smaller than or equal to the energy consumption of the refrigerator before the rotation speed of the bottom cooling fan is adjusted downwards; and when the energy consumption of the refrigerator does not meet the preset low energy consumption condition, controlling the bottom cooling fan to increase the rotating speed by the preset bottom cooling step length.

Specifically, in order to improve the refrigerating effect of the refrigerator, a bottom cooling fan is arranged near the condenser and acts on the condenser to dissipate heat of the condenser, so that the heat exchange efficiency of the condenser is accelerated to a certain extent, the compressor is fully exerted, the improvement of the refrigerating effect of the refrigerator is facilitated, after the noise elimination parameters of the muffler are adjusted, when the noise reduction effect of the muffler on the whole machine does not reach the expected effect, the speed of the storage room fan is not reduced, but the speed of the bottom cooling fan is adjusted, so that the purpose of noise reduction is achieved.

It should be noted that, after the rotation speed of the bottom cooling fan is adjusted, a preset period of time needs to be waited, so that the obtained refrigerator can accurately reflect the influence of the current running state of the related device on the energy consumption, and the waiting time can be set by a worker according to the actual situation, which is not limited herein.

In one embodiment, the muffler is a microperforated panel muffler, the sound damping parameter is cavity depth, and the noise parameter value is a noise value, vibration acceleration, or acoustic quality; the controller is further configured to: when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the microperforated panel muffler to gradually increase the cavity depth by a first preset step length until a preset adjustment ending condition is met; and when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the microperforated panel silencer to gradually reduce the cavity depth by the first preset step length until the preset adjustment ending condition is met.

Specifically, the silencer adopted in the embodiment of the invention is a microperforated panel silencer, the microperforated panel silencer is a resonance type sound absorption structure, no porous sound absorption material is used, a plurality of micropores are drilled on a thin metal plate with the thickness of less than 1mm, the pore diameter of the micropores is generally about 0.5-1 mm, the penetration rate is 1% -3%, a certain cavity is reserved behind the perforated plate, the microperforated panel silencer becomes the microperforated panel sound absorption structure, the depth of the cavity is changed, the microperforated panel silencer is suitable for noise elimination of different frequency bands, and the larger the depth of the cavity of the microperforated panel silencer is, the lower the resonance frequency is, namely the lower the corresponding optimal silencing frequency band is.

In one embodiment, the muffler is a thin film acoustic metamaterial muffler, the noise elimination parameter is thin film tension, and the noise parameter value is a noise value, vibration acceleration or sound quality; the controller is further configured to: when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the film acoustic metamaterial muffler to gradually increase film tension by a second preset step length until a preset adjustment ending condition is met; and when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the film acoustic metamaterial muffler to gradually reduce film tension by the second preset step length until the preset adjustment ending condition is met.

Specifically, the film acoustic metamaterial muffler also performs noise elimination through resonance, and the film acoustic metamaterial muffler can be suitable for noise elimination of different frequency bands through changing film tension, so that the larger the film tension of the film acoustic metamaterial muffler is, the larger the film rigidity is, the higher the resonance frequency is, namely the higher the corresponding optimal noise elimination frequency band is.

In one embodiment, the preset adjustment end condition is: the noise parameter reduction amount of the current target frequency band is larger than or equal to the preset target reduction amount; or the noise parameter reduction amount of the current target frequency band is smaller than the preset target reduction amount, larger than the noise parameter reduction amount of the left adjacent frequency band and larger than the noise parameter reduction amount of the right adjacent frequency band; the noise parameter reduction amount of the current target frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the target frequency band, the noise parameter reduction amount of the left adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the left adjacent frequency band, and the noise parameter reduction amount of the right adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the right adjacent frequency band.

Specifically, if the noise parameter reduction amount of the current target frequency band is greater than or equal to the preset target reduction amount, the noise reduction amount is required, the current noise elimination parameter of the muffler can effectively reduce noise, if the noise parameter reduction amount of the current target frequency band is smaller than the preset target reduction amount, the noise parameter reduction amounts of the left adjacent frequency band and the right adjacent frequency band of the target frequency band are analyzed, and if the noise parameter reduction amounts of the left adjacent frequency band and the right adjacent frequency band are both lower than the noise parameter reduction amount of the current target frequency band, the current optimal noise elimination frequency band of the muffler is the target frequency band.

It should be noted that, the specific value of the preset target reduction is set by the manufacturer according to the actual situation, which is not limited herein.

Referring to fig. 10, fig. 10 is a third workflow diagram of a controller according to an embodiment of the present invention, the controller being configured to perform steps S23 to S28:

s23, responding to a low-noise operation instruction, determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device to serve as a target frequency band, and then entering step S24.

S24, judging whether the acquired current optimal silencing frequency band of the silencer is matched with the target frequency band, if so, entering a step S28, and if not, entering a step S25.

S25, controlling the muffler to adjust the noise elimination parameters in a preset step size, and then entering step S26.

S26, judging whether the noise parameter reduction amount of the current target frequency band is larger than or equal to the preset target reduction amount, if so, proceeding to the step S28, otherwise, proceeding to the step S27.

S27, judging whether the noise parameter reduction amount of the current target frequency band meets the conditions of being smaller than the preset target reduction amount, being larger than the noise parameter reduction amount of the left adjacent frequency band and being larger than the noise parameter reduction amount of the right adjacent frequency band, if yes, entering a step S28, otherwise, returning to the step S25.

And S28, controlling the muffler to maintain the current noise elimination parameters.

In a preferred embodiment, the controller is further configured to: setting noise parameter test values of different frequency bands; aiming at the noise parameter test value of each frequency band, carrying out noise elimination parameter adjustment on the muffler, screening noise elimination parameters with the minimum noise parameter test value after the muffler eliminates noise, and establishing a corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band; and acquiring the current silencing parameter of the silencer, and determining the current optimal silencing frequency band based on the corresponding relation between the silencing parameter and the optimal silencing frequency band.

Specifically, by setting noise parameter test values of different frequency bands, one-to-one test is performed, corresponding noise elimination parameters are found, the corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band is established, in practical application, when the noise elimination parameters of the muffler are required to be adjusted to adapt to real-time refrigerator noise, the real-time noise elimination parameters of the muffler are acquired, the current optimal noise elimination frequency band is determined by combining the corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band, and the optimal noise elimination frequency band of the muffler can be determined according to the acquired real-time noise elimination parameters.

In one embodiment, the muffler is controlled to maintain current muffling parameters when the current optimal muffling frequency band matches the target frequency.

Specifically, the noise elimination effect of the muffler on noise in different frequency bands is different and depends on the noise elimination parameters of the muffler, so that the current optimal noise elimination frequency band of the muffler is obtained to be compared with the target frequency band, and if the current optimal noise elimination frequency band is matched with the target frequency band, the muffler can effectively eliminate the noise without adjusting the noise elimination parameters of the muffler.

In one embodiment, the whole noise parameter detection device is a whole noise sensor, the whole noise parameter value is a whole noise value, and the target whole noise parameter value is a target whole noise value;

The controller is further configured to:

and after the refrigerator is restarted, aiming at the corresponding relation between each noise elimination parameter and the rotating speed of the fan, when the real-time whole machine noise value detected by the whole machine noise sensor is larger than the target whole machine noise value, adjusting the corresponding relation between the noise elimination parameters and the rotating speed of the fan.

Specifically, after the corresponding relation between the noise elimination parameter and the fan rotating speed is generated, in the subsequent application, the fan is different in noise under the same rotating speed due to other factors such as refrigerator aging, so that the corresponding relation between the noise elimination parameter and the fan rotating speed needs to be debugged again.

Compared with the prior art, the refrigerator disclosed by the embodiment of the invention has the advantages that the noise parameter value detected by the noise parameter detection device is obtained by responding to the low-noise operation instruction, so that the noise parameter frequency band with the largest noise contribution value is determined as the target frequency band; when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition. Therefore, according to the embodiment of the invention, the noise reduction of the refrigerator can be realized rapidly and accurately by determining the frequency band with the largest contribution value in the noise parameter value and then correspondingly adjusting the noise elimination parameter of the muffler, the refrigerating effect of the refrigerator is not influenced, and the user experience is improved.

Referring to fig. 11, fig. 11 is a flowchart of a refrigerator noise reduction method according to an embodiment of the present invention, where the refrigerator noise reduction method according to the embodiment of the present invention is implemented by a controller in the refrigerator; the method comprises the following steps:

s1, determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device, and taking the noise parameter frequency band as a target frequency band; the noise parameter detection device is arranged on the refrigerator;

s2, when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition; wherein, the silencer is arranged in the refrigerator.

In one embodiment, the method further comprises:

the refrigerator further comprises a complete machine noise parameter detection device which is arranged on the refrigerator and used for detecting complete machine noise parameter values;

the noise parameter detection device is an air duct noise parameter detection device and is arranged on an air duct of the refrigerator, and the noise parameter value is an air duct noise parameter value;

the method further comprises the steps of:

after the noise elimination parameters are adjusted, if the current whole noise parameter value detected by the whole noise parameter detection device is smaller than or equal to a preset target whole noise parameter value, recording the current noise elimination parameters of the muffler and the current rotating speed of a fan of the refrigerator, and establishing a corresponding relation between the noise elimination parameters and the rotating speed of the fan;

After the noise elimination parameters are adjusted, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, and the noise elimination parameters of the muffler are adjusted again.

In one embodiment, the refrigerator further includes:

a refrigerant circuit for sequentially circulating a refrigerant through a compressor, a condenser, a pressure reducer, and an evaporator, for providing cold energy to a storage chamber of a refrigerator;

the bottom cooling fan is arranged near the condenser and used for radiating heat for the condenser;

the fan is a storage room fan and is used for sending the cold energy into the storage room;

the method further comprises the steps of:

after the noise elimination parameters are adjusted, before the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the bottom cooling fan is adjusted downwards by a preset bottom cooling step length until the current whole machine noise parameter value is smaller than or equal to the target whole machine noise parameter value, or the refrigerator energy consumption does not meet a preset low energy consumption condition; the preset low energy consumption condition is that the energy consumption of the refrigerator after the rotation speed of the bottom cooling fan is adjusted downwards is smaller than or equal to the energy consumption of the refrigerator before the rotation speed of the bottom cooling fan is adjusted downwards;

And when the energy consumption of the refrigerator does not meet the preset low energy consumption condition, controlling the bottom cooling fan to increase the rotating speed by the preset bottom cooling step length.

In one embodiment, the muffler is a microperforated panel muffler, the sound damping parameter is cavity depth, and the noise parameter value is a noise value, vibration acceleration, or acoustic quality;

the method further comprises the steps of:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the microperforated panel muffler to gradually increase the cavity depth by a first preset step length until a preset adjustment ending condition is met;

and when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the microperforated panel silencer to gradually reduce the cavity depth by the first preset step length until the preset adjustment ending condition is met.

In one embodiment, the muffler is a thin film acoustic metamaterial muffler, the noise elimination parameter is thin film tension, and the noise parameter value is a noise value, vibration acceleration or sound quality;

the method further comprises the steps of:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the film acoustic metamaterial muffler to gradually increase film tension by a second preset step length until a preset adjustment ending condition is met;

And when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the film acoustic metamaterial muffler to gradually reduce film tension by the second preset step length until the preset adjustment ending condition is met.

In one embodiment, the preset adjustment end condition is:

the noise parameter reduction amount of the current target frequency band is larger than or equal to the preset target reduction amount;

or the noise parameter reduction amount of the current target frequency band is smaller than the preset target reduction amount, larger than the noise parameter reduction amount of the left adjacent frequency band and larger than the noise parameter reduction amount of the right adjacent frequency band;

the noise parameter reduction amount of the current target frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the target frequency band, the noise parameter reduction amount of the left adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the left adjacent frequency band, and the noise parameter reduction amount of the right adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the right adjacent frequency band.

In one embodiment, the method further comprises:

Setting noise parameter test values of different frequency bands;

aiming at the noise parameter test value of each frequency band, carrying out noise elimination parameter adjustment on the muffler, screening noise elimination parameters with the minimum noise parameter test value after the muffler eliminates noise, and establishing a corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band;

and acquiring the current silencing parameter of the silencer, and determining the current optimal silencing frequency band based on the corresponding relation between the silencing parameter and the optimal silencing frequency band.

In one embodiment, the method further comprises:

and when the current optimal silencing frequency range is matched with the target frequency, controlling the silencer to keep the current silencing parameters.

In one embodiment, the whole noise parameter detection device is a whole noise sensor, the whole noise parameter value is a whole noise value, and the target whole noise parameter value is a target whole noise value;

the method further comprises the steps of:

after the refrigerator is restarted, aiming at the corresponding relation between each noise elimination parameter and the rotating speed of the fan, when the real-time whole machine noise value detected by the whole machine noise sensor is larger than the target whole machine noise value, the corresponding relation between the noise elimination parameters and the rotating speed of the fan is adjusted

It should be noted that, the working process of any noise reduction method for a refrigerator in the embodiment of the present invention may refer to the specific working process of the controller for a refrigerator in the above embodiment, and will not be described herein.

Compared with the prior art, the refrigerator noise reduction method disclosed by the embodiment of the invention has the advantages that the noise parameter value detected by the noise parameter detection device is obtained by responding to the low-noise operation instruction, so that the noise parameter frequency band with the largest noise contribution value is determined as the target frequency band; when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition. Therefore, according to the embodiment of the invention, the noise reduction of the refrigerator can be realized rapidly and accurately by determining the frequency band with the largest contribution value in the noise parameter value and then correspondingly adjusting the noise elimination parameter of the muffler, the refrigerating effect of the refrigerator is not influenced, and the user experience is improved.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (10)

1. A refrigerator, comprising:

the muffler is arranged in the refrigerator and used for reducing noise of the refrigerator, and the noise elimination parameter of the muffler is adjustable;

the noise parameter detection device is arranged on the refrigerator and is used for detecting noise parameter values;

a controller for:

responding to a low-noise operation instruction, and determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device to serve as a target frequency band;

when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition.

2. The refrigerator as claimed in claim 1, further comprising a whole machine noise parameter detecting device provided on the refrigerator for detecting a whole machine noise parameter value;

the noise parameter detection device is an air duct noise parameter detection device and is arranged on an air duct of the refrigerator, and the noise parameter value is an air duct noise parameter value;

the controller is further configured to:

after the noise elimination parameters are adjusted, if the current whole noise parameter value detected by the whole noise parameter detection device is smaller than or equal to a preset target whole noise parameter value, recording the current noise elimination parameters of the muffler and the current rotating speed of a fan of the refrigerator, and establishing a corresponding relation between the noise elimination parameters and the rotating speed of the fan;

After the noise elimination parameters are adjusted, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, and the noise elimination parameters of the muffler are adjusted again.

3. The refrigerator of claim 2, further comprising:

a refrigerant circuit for sequentially circulating a refrigerant through a compressor, a condenser, a pressure reducer, and an evaporator, for providing cold energy to a storage chamber of a refrigerator;

the bottom cooling fan is arranged near the condenser and used for radiating heat for the condenser;

the fan is a storage room fan and is used for sending the cold energy into the storage room;

the controller is further configured to:

after the noise elimination parameters are adjusted, before the rotating speed of the fan is adjusted downwards by a preset rotating speed reduction amount, if the current whole machine noise parameter value is larger than the target whole machine noise parameter value, the rotating speed of the bottom cooling fan is adjusted downwards by a preset bottom cooling step length until the current whole machine noise parameter value is smaller than or equal to the target whole machine noise parameter value, or the refrigerator energy consumption does not meet a preset low energy consumption condition; the preset low energy consumption condition is that the energy consumption of the refrigerator after the rotation speed of the bottom cooling fan is adjusted downwards is smaller than or equal to the energy consumption of the refrigerator before the rotation speed of the bottom cooling fan is adjusted downwards;

And when the energy consumption of the refrigerator does not meet the preset low energy consumption condition, controlling the bottom cooling fan to increase the rotating speed by the preset bottom cooling step length.

4. The refrigerator of claim 1, wherein the muffler is a microperforated panel muffler, the noise elimination parameter is cavity depth, and the noise parameter value is noise value, vibration acceleration, or sound quality;

the controller is further configured to:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the microperforated panel muffler to gradually increase the cavity depth by a first preset step length until a preset adjustment ending condition is met;

and when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the microperforated panel silencer to gradually reduce the cavity depth by the first preset step length until the preset adjustment ending condition is met.

5. The refrigerator of claim 1, wherein the muffler is a thin film acoustic metamaterial muffler, the noise elimination parameter is a thin film tension, and the noise parameter value is a noise value, a vibration acceleration, or an acoustic quality;

the controller is further configured to:

when the current optimal noise elimination frequency band is larger than the target frequency band, controlling the film acoustic metamaterial muffler to gradually increase film tension by a second preset step length until a preset adjustment ending condition is met;

And when the current optimal noise elimination frequency band is smaller than the target frequency band, controlling the film acoustic metamaterial muffler to gradually reduce film tension by the second preset step length until the preset adjustment ending condition is met.

6. The refrigerator of claim 4 or 5, wherein the preset adjustment end condition is:

the noise parameter reduction amount of the current target frequency band is larger than or equal to the preset target reduction amount;

or the noise parameter reduction amount of the current target frequency band is smaller than the preset target reduction amount, larger than the noise parameter reduction amount of the left adjacent frequency band and larger than the noise parameter reduction amount of the right adjacent frequency band;

the noise parameter reduction amount of the current target frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the target frequency band, the noise parameter reduction amount of the left adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the left adjacent frequency band, and the noise parameter reduction amount of the right adjacent frequency band is the difference between noise contribution values of the noise parameter values before and after the noise elimination parameter adjustment of the muffler in the right adjacent frequency band.

7. The refrigerator as claimed in any one of claims 1 to 5, wherein the controller is further configured to:

setting noise parameter test values of different frequency bands;

aiming at the noise parameter test value of each frequency band, carrying out noise elimination parameter adjustment on the muffler, screening noise elimination parameters with the minimum noise parameter test value after the muffler eliminates noise, and establishing a corresponding relation between the noise elimination parameters and the optimal noise elimination frequency band;

and acquiring the current silencing parameter of the silencer, and determining the current optimal silencing frequency band based on the corresponding relation between the silencing parameter and the optimal silencing frequency band.

8. The refrigerator as claimed in any one of claims 1 to 5, wherein the controller is further configured to:

and when the current optimal silencing frequency range is matched with the target frequency, controlling the silencer to keep the current silencing parameters.

9. The refrigerator as claimed in any one of claims 3 to 5, wherein the whole machine noise parameter detecting means is a whole machine noise sensor, the whole machine noise parameter value is a whole machine noise value, and the target whole machine noise parameter value is a target whole machine noise value;

the controller is further configured to:

and after the refrigerator is restarted, aiming at the corresponding relation between each noise elimination parameter and the rotating speed of the fan, when the real-time whole machine noise value detected by the whole machine noise sensor is larger than the target whole machine noise value, adjusting the corresponding relation between the noise elimination parameters and the rotating speed of the fan.

10. A method of noise reduction in a refrigerator, comprising:

determining a noise parameter frequency band with the maximum noise contribution value according to the noise parameter value detected by the noise parameter detection device, and taking the noise parameter frequency band as a target frequency band; wherein the noise parameter detection device is arranged on the refrigerator,

when the obtained current optimal silencing frequency band of the silencer is not matched with the target frequency band, controlling the silencer to adjust the silencing parameters in a preset step length until the noise parameter reduction amount of the noise parameter value in the target frequency band meets a preset adjustment ending condition; wherein, the silencer is arranged in the refrigerator.