Refrigerator and noise reduction method thereof

Abstract

The invention discloses a refrigerator and a noise reduction method thereof. The refrigerator comprises a refrigerator body, a first sensor and a controller. The first sensor is arranged on the refrigerator body and is configured to detect noise signals of the environment where the refrigerator is located. The controller is configured to obtain a noise signal detected by the first sensor; if it is determined that the environment where the refrigerator is located does not meet the preset rest environment condition, the rotating speed of a compressor and the rotating speed of a fan of the refrigerator are adjusted according to the noise signal; and if it is determined that the environment where the refrigerator is located meets the rest environment condition, the noise signal is corrected through a correction value obtained in advance, and the rotating speed of the compressor and the rotating speed of the fan are adjusted according to the corrected noise signal.

Description

Refrigerator and noise reduction method thereof

[0001] This application claims priority to Chinese patent application No. 202310366230.9 filed on April 7, 2023, and priority to Chinese patent application No. 202310226719.6 filed on March 10, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of household appliances, and in particular to a refrigerator and a noise reduction method thereof. Background Art

[0003] With the continuous development of science and technology, people's living standards are improving, and their requirements for home appliances are also becoming higher and higher. Refrigerators, as essential household appliances, are in constant operation year-round. People expect refrigerators to not only preserve freshness and save energy, but also reduce operating noise and provide users with a good rest environment.

[0004] Summary of the Invention

[0005] On the one hand, a refrigerator is provided, comprising a housing, a door, a compressor, a fan, a first sensor, and a controller. The housing has a compartment. The door is configured to open or close the compartment. The compressor and the fan are disposed in the housing. The first sensor is disposed in the housing and is configured to detect a noise signal of the environment in which the refrigerator is located. The controller is configured to: obtain the noise signal detected by the first sensor; if it is determined that a preset rest environment condition is not met, adjust the rotation speeds of the compressor and the fan according to the noise signal; if it is determined that the rest environment condition is met, correct the noise signal using a pre-acquired correction value, and adjust the rotation speeds of the compressor and the fan according to the corrected noise signal.

[0006] On the other hand, a noise reduction method for a refrigerator is provided, wherein the refrigerator includes a housing, a door, a compressor, a fan, and a first sensor. The housing has a compartment. The door is configured to open or close the compartment. The compressor and the fan are disposed in the housing. The first sensor is disposed in the housing and is configured to detect a noise signal of the environment in which the refrigerator is located. The noise reduction method for the refrigerator includes: obtaining a noise signal detected by the first sensor; if a preset rest environment condition is not met, adjusting the rotation speeds of the compressor and the fan according to the noise signal; if the rest environment condition is met, correcting the noise signal using a pre-acquired correction value, and adjusting the rotation speeds of the compressor and the fan according to the corrected noise signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is a structural diagram of a refrigerator according to some embodiments of the present disclosure;

[0008] FIG2A is a block diagram of a controller according to some embodiments of the present disclosure;

[0009] FIG2B is another block diagram of a controller according to some embodiments of the present disclosure;

[0010] FIG3 is a flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0011] FIG4 is another flow chart of a control method for a refrigerator according to some embodiments of the present disclosure;

[0012] FIG5 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0013] FIG6 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0014] FIG7 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0015] FIG8 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0016] FIG9 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0017] FIG10 is another flow chart of a method for controlling a refrigerator according to some embodiments of the present disclosure;

[0018] FIG11 is a flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0019] FIG12 is another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0020] FIG13 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0021] FIG14 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0022] FIG15 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0023] FIG16 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0024] FIG17 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0025] FIG18 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0026] FIG19 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure;

[0027] FIG20 is yet another flow chart of another control method of a refrigerator according to some embodiments of the present disclosure; and

[0028] FIG. 21 is yet another flow chart of another method for controlling a refrigerator according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0030] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0032] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0033] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0034] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0035] As used herein, "equal" includes the stated conditions and conditions that are similar to the stated conditions, where the range of the similar conditions is within an acceptable range of deviation, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "equal" includes absolute equality and approximate equality, where the acceptable range of deviation for approximate equality can be, for example, that the difference between the two is less than or equal to 5% of either.

[0036] Referring to Figure 1 , a refrigerator 100 includes a housing 10 and a door 20 defining a storage space. The housing 10 has compartments configured to store food, medicine, and the like. Depending on their intended use, these compartments can be categorized as refrigerators, freezers, temperature-changing chambers, vacuum chambers, and the like. The door 20 is positioned at the opening of the housing 10 to open or close the compartments. The door 20 includes a door shell and an insulation layer disposed within the door shell. The insulation layer can be formed by filling with a foam material.

[0037] In some embodiments, each compartment has one or more doors 20 corresponding to its opening. For example, the upper compartment of the refrigerator 100 is a refrigerator compartment, which is provided with two doors 20. The lower compartment of the refrigerator 100 is a freezer compartment, which is provided with one door 20. This door 20 can be connected to a drawer in the freezer compartment, and the user can open and close the door 20 by pushing and pulling to access food.

[0038] In some embodiments, refrigerator 100 further includes a refrigeration system configured to cool the compartments within housing 10. The refrigeration system includes a compressor 1, a condenser, and an evaporator. The outlet of compressor 1 is connected to the inlet of the condenser, and the inlet of compressor 1 is connected to the outlet of the evaporator. Compressor 1 is configured to compress refrigerant and provide power for the refrigerant circulation.

[0039] In some embodiments, the refrigerator 100 further includes a fan 140. The fan 140 is disposed in the housing 10 and is configured to allow air to enter the evaporator, exchange heat with the evaporator, and deliver the heat-exchanged air into the compartment.

[0040] In some embodiments, the operating mode of the refrigerator 100 includes a cooling mode. In the cooling mode, if the compartment temperature is greater than a preset compartment temperature, the compressor 1 and the fan 140 operate at high speed to quickly reduce the compartment temperature. It is understood that when the compressor 1 and the fan 140 of the refrigerator 100 operate at high speed, they can quickly meet the cooling demand, but they also generate relatively loud noise.

[0041] Since frost forms on the fins of the evaporator 6 during the refrigeration process, the refrigerator 100 also has a defrost mode. This mode includes a defrost period and a defrost recovery period. During the defrost period, the compressor 1 and fan 140 are shut down, and the refrigerator 100 defrosts the evaporator fins using the electric heating wires.

[0042] During the defrost process, the heat from the heating wire is transferred to the storage compartment, raising the temperature of the storage compartment. Therefore, after the defrost process is complete, the refrigerator 100 enters a defrost recovery period. During this period, the compressor 1 and fan 140 need to operate at high speeds, and this speed can be higher than that in cooling mode, to quickly restore the compartment temperature.

[0043] It is understandable that both the defrost and defrost recovery periods generate high levels of noise. The noise during the defrost period comes from the sizzling sound of defrost droplets hitting the heating wires and the sound of the refrigerant flowing. During the defrost recovery period, the high-speed operation of the compressor 1 and fan 140 also generates noise.

[0044] Typically, refrigerator noise reduction methods involve using a noise sensor to acquire noise signals from the refrigerator, comparing the acquired noise signals with a preset noise threshold, and then applying noise reduction based on the comparison result. However, this approach presents a problem: in resting environments, such as those with low light levels, the human ear is more sensitive to noise. If the same criteria are used to control the refrigerator's noise reduction, the refrigerator might not be operating while the noise is bothering the user.

[0045] To address the above issues, some embodiments of the present disclosure provide a refrigerator 100 that first determines whether the environment in which refrigerator 100 is located meets the resting environment conditions. If the environment in which refrigerator 100 is located meets the resting environment conditions, refrigerator 100 is controlled to enter sleep mode. In sleep mode, refrigerator 100 corrects the currently acquired noise signal so that the noise signal conforms to the noise actually perceived by the human ear. This enhances the noise reduction effect of refrigerator 100 in resting environment conditions, avoids interference to the user, and thus improves the noise reduction function of refrigerator 100.

[0046] In some embodiments, the refrigerator 100 further includes a first sensor 110. The first sensor 110 is disposed on the housing 10 and is configured to detect a noise signal of the environment in which the refrigerator 100 is located. For example, the noise signal includes a sound pressure level signal.

[0047] As shown in FIG2A , the refrigerator 100 further includes a controller 200. The controller 200 includes a memory and a processor. The memory is configured to store program instructions, and the processor is configured to execute the program instructions to control the operation of various components of the refrigerator and respond to user operations. The controller 200 is coupled to the first sensor 110 to obtain the noise signal. The controller 200 is configured to:

[0048] The noise signal detected by the first sensor 110 is acquired.

[0049] When the preset rest environment conditions are not met, the rotational speeds of the compressor 1 and the fan 140 are adjusted according to the noise signal.

[0050] When the rest environment condition is met, the noise signal is corrected using the correction value obtained in advance, and the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal.

[0051] It is understood that when the environment in which the refrigerator 100 is located meets the preset resting environment conditions, the human ear is more sensitive to noise. In this case, the controller 200 modifies the noise signal currently detected by the first sensor 110 so that the modified noise signal is more consistent with the noise that humans can subjectively perceive. This prevents the refrigerator 100 from having insufficient noise reduction effects in resting environment conditions, thereby preventing interference to the user.

[0052] Thus, when the preset resting environment conditions are not met, if the noise signal is greater than the preset noise signal threshold, the controller 200 controls the compressor 1 and fan 140 to reduce their speeds. When the resting environment conditions are met, the controller 200 corrects the noise signal using a pre-acquired correction value. If the corrected noise signal is greater than the noise signal threshold, the controller controls the compressor 1 and fan 140 to reduce their speeds. This allows the refrigerator 100 to be rationally controlled to achieve noise reduction.

[0053] In some embodiments, the controller 200 is further configured to: add the correction value to different frequency bands of the noise signal respectively, that is, superimpose the pre-acquired correction value with the noise signal to obtain the corrected noise signal.

[0054] In some embodiments, the controller 200 is further configured to extend the operating cycle of the compressor 1 when the environment of the refrigerator 100 meets the preset resting environment conditions. This can avoid the noise generated by the frequent starting and stopping of the compressor 1, thereby further enhancing the noise reduction effect of the refrigerator 100.

[0055] In some embodiments, in order to obtain the correction value, the controller 200 is further configured to:

[0056] A first noise average value, a second noise average value, and a preset coefficient corresponding to the refrigerator noise nominal value are obtained.

[0057] The correction value is calculated according to the first noise average value, the second noise average value, and the coefficient.

[0058] It should be noted that the refrigerator noise rating is the noise standard set for the refrigerator. For example, the refrigerator noise rating is 35dB, which means that the noise generated by the refrigerator 100 is less than or equal to 35dB.

[0059] To obtain the first noise average value and the second noise average value, the controller 200 is further configured to:

[0060] All noise signals detected by the first sensor within a preset time period and when the rest environment condition is not met are acquired, and an average value of the noise signals is calculated, and the average value is used as a first noise average value.

[0061] All noise signals detected by the first sensor within the preset time period and when the rest environment condition is met are acquired, and an average value of the noise signals is calculated, and the average value is used as a second noise average value.

[0062] It can be understood that the purpose of obtaining the first noise average value and the second noise average value is mainly to test the user's home environment noise.

[0063] For example, after the refrigerator 100 is first installed, it can test a first noise average value within 24 hours when the environment does not meet the rest environment condition, and a second noise average value within 24 hours when the environment meets the rest environment condition.

[0064] The refrigerator noise rating is positively correlated with the coefficient. For example, for a refrigerator with a noise rating greater than or equal to 40dB, the corresponding coefficient is X. For a refrigerator with a noise rating greater than or equal to 35dB and less than 40dB, the corresponding coefficient is Y. For a refrigerator with a noise rating greater than or equal to 30dB and less than 35dB, the corresponding coefficient is Z. Therefore, X>Y>Z.

[0065] In some embodiments, the controller 200 pre-stores the refrigerator noise rating and a correspondence between the refrigerator noise rating and a coefficient. In this case, the controller 200 can determine the coefficient corresponding to the refrigerator noise rating based on the preset refrigerator noise rating of the refrigerator 100 and the correspondence. Finally, the correction value is calculated based on the first average noise value, the second average noise value, and the coefficient.

[0066] In some embodiments, after obtaining the first noise average value, the second noise average value, and the coefficient, the controller 200 is further configured to:

[0067] The absolute value of the difference between the first noise average value and the second noise average value is calculated.

[0068] The absolute value is divided by the coefficient to obtain the correction value.

[0069] Thus, after obtaining the first and second noise average values, the absolute value of the difference between the first and second noise average values ​​is calculated, and then the absolute value is divided by the coefficient to obtain the correction value. Finally, the correction value is superimposed on the noise signal to complete the correction of the noise signal, making the noise signal more prominent and more consistent with the noise that humans can actually perceive.

[0070] It is understandable that the larger the nominal noise level of the refrigerator, the less the noise signal is affected by the ambient noise, and therefore the smaller the correction value.

[0071] In some embodiments, the rest environment condition includes: the current time is within a preset night time range.

[0072] It is understandable that as night approaches, the surrounding environment gradually darkens, and the ambient noise at night is quieter than during the day, making the human ear more sensitive to noise. Therefore, the noise of the refrigerator 100 at night may appear louder than during the day. In this case, the controller 200 can determine whether to modify the noise signal by determining whether the current time is within the preset night time range.

[0073] For example, if the current time is between 19:00 and 7:00, the noise signal is corrected, and the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal.

[0074] In some embodiments, the refrigerator 100 further includes a second sensor 120. The second sensor 120 is provided in the housing 10 and is configured to detect the brightness of the environment in which the refrigerator 100 is located. The resting environment condition may include: the current brightness is less than a preset brightness threshold.

[0075] It is understandable that when people need to rest, the surrounding environment also needs to be dim or dark. This makes it easier for people to fall asleep. At this time, the human ear is also more sensitive to noise. Therefore, the controller 200 can determine whether to correct the noise signal by determining whether the current light brightness is less than a preset light brightness threshold.

[0076] If the current light brightness is less than the preset light brightness threshold, the noise signal is corrected, and the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal.

[0077] In some embodiments, the rest environment conditions include: the current time is within a preset night time range, and the current light brightness is less than a preset light brightness threshold. In addition, the controller 200 may prioritize determining whether the current light brightness is less than the preset light brightness threshold.

[0078] If the current light brightness is less than the preset light brightness threshold, the refrigerator 100 is controlled to enter the sleep mode even if the current time is outside the preset night time range. If the current light brightness is greater than or equal to the preset light brightness threshold, the refrigerator 100 may not enter the sleep mode even if the current time is within the preset night time range.

[0079] It's understandable that users are more aware of noise in darkness. Since users may tend to stay up late, if the current time falls within the preset nighttime range, the user isn't necessarily resting, and refrigerator 100 may not enter sleep mode. This improves the accuracy of resting environment judgment, reduces the number of noise reduction operations performed by refrigerator 100, and ensures the freshness of food inside the room.

[0080] In some embodiments, the refrigerator 100 further includes a control panel, through which the user can set the refrigerator 100 to sleep mode. As shown in FIG2B , the refrigerator 100 further includes a communication component 60. The controller 200 is coupled to the communication component 60 to communicate with a terminal device via the communication component 60. When the user needs to rest, the user can remotely control the refrigerator 100 to enter sleep mode via the terminal device.

[0081] In some embodiments, the terminal device 60 can detect the physiological state of the user and send the physiological state of the user to the controller 200. If the controller 200 determines that the user is in a resting state, it controls the refrigerator 100 to enter the sleep mode.

[0082] In some embodiments, the refrigerator 100 can also communicate with other devices in the home environment (such as curtains, air conditioners, air purifiers, etc.) to obtain the operating status of the devices in the home environment, and determine whether to control the refrigerator to enter sleep mode based on the operating status of the devices.

[0083] For example, if the curtains are closed, it is determined that the user is resting, and the operation mode of the refrigerator 100 is adjusted to the sleep mode. If the air conditioner or air purifier is in the sleep mode, the refrigerator 100 is also controlled to operate in the sleep mode.

[0084] In some embodiments, after correcting the noise signal using the pre-acquired correction value, the controller 200 is further configured to:

[0085] According to the corrected noise signal, a corrected noise evaluation parameter is obtained.

[0086] If the corrected noise evaluation parameter is greater than the preset noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to reduce their rotation speeds.

[0087] It should be noted that the noise evaluation parameter includes at least one of a series of parameters that can be used to evaluate noise, such as sound power, perceived noisiness, or a noise criterion (NC) value. After obtaining the corrected noise signal, the corrected noise evaluation parameter can be obtained by calculating the corrected noise signal.

[0088] For example, the sound power can be calculated based on the corrected noise signal and the exposure area. The perceived noisiness can be calculated based on the corrected noise signal and the iso-noise curve. The noise NC value can be calculated based on the corrected noise signal and the noise criteria curve (NC curve).

[0089] If the corrected noise evaluation parameters are all less than or equal to the corresponding noise evaluation parameter thresholds, the compressor 1 and fan 140 are controlled to continue operating at the current speed. If any of the corrected noise evaluation parameters is greater than the corresponding noise evaluation parameter threshold, the compressor 1 and fan 140 are controlled to reduce their speed to reduce noise.

[0090] In some embodiments, after acquiring the noise signal, the controller 200 is further configured to:

[0091] A noise evaluation parameter is obtained according to the noise signal.

[0092] If the noise evaluation parameter is greater than a preset noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to reduce their rotation speeds.

[0093] It should be noted that the noise evaluation parameter may also include at least one of a series of parameters that can be used to evaluate noise, such as sound power, perceived noisiness, or noise NC value. After acquiring the noise signal, the noise evaluation parameter can be obtained by processing the noise signal.

[0094] If all noise evaluation parameters are less than or equal to the corresponding noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to continue to operate at the current speed. If any noise evaluation parameter is greater than the corresponding noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to reduce the speed to reduce noise.

[0095] In some embodiments, the refrigerator 200 further includes a third sensor 130. The third sensor 130 is disposed in the housing 10 and is configured to detect the compartment temperature of the refrigerator 100. After adjusting the speeds of the compressor 1 and the fan 140, the controller 200 is further configured to:

[0096] The compartment temperature detected by the third sensor 130 is obtained.

[0097] If the compartment temperature is greater than the preset temperature threshold, the speeds of the compressor 1 and the fan 140 are controlled to increase.

[0098] In this way, after the compressor 1 and the fan 140 are rotated at a lower speed, the compartment temperature detected by the third sensor 130 is obtained. If the compartment temperature is greater than the preset temperature threshold, the speed of the compressor 1 and the fan 140 is increased to ensure the cooling effect of the refrigerator 100.

[0099] 3 , some embodiments of the present disclosure further provide a noise reduction method for a refrigerator 100 . The noise reduction method for the refrigerator 100 includes:

[0100] Step S11 : acquiring a noise signal detected by the first sensor 110 .

[0101] Step S12: If the current environment does not meet the preset rest environment conditions, the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the noise signal.

[0102] Step S13: If the current environment meets the rest environment condition, the noise signal is corrected using the pre-acquired correction value, and the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal.

[0103] 4 , to obtain the correction value in step S13 , the method further includes steps S131 to S132 .

[0104] Step S131: Obtain a first noise average value, a second noise average value, and a preset coefficient corresponding to the nominal noise level of the refrigerator.

[0105] Step S132: Calculate the correction value according to the first noise average value, the second noise average value, and the coefficient.

[0106] 5 , step S132 , in which the correction value is calculated based on the first noise average value, the second noise average value, and the coefficient, includes steps S1321 to S1322 .

[0107] Step S1321 : Calculate the absolute value of the difference between the first noise average value and the second noise average value.

[0108] Step S1322: Divide the absolute value by the coefficient to obtain the correction value.

[0109] In some embodiments, the rest environment condition includes: the current time of the environment in which the refrigerator 100 is located is within a preset night time range. Referring to Figure 6 , the method includes steps S21 to S24.

[0110] Step S21 , obtaining the noise signal detected by the first sensor 110 and the current time of the environment in which the refrigerator 100 is located.

[0111] Step S22, determining whether the current time is within the preset night time range. If not, proceed to step S23, and if so, proceed to step S24.

[0112] Step S23: adjusting the rotation speeds of the compressor 1 and the fan 140 according to the noise signal.

[0113] Step S24: correct the noise signal using the correction value obtained in advance, and adjust the rotation speeds of the compressor 1 and the fan 140 according to the corrected noise signal.

[0114] In some embodiments, the resting environment condition includes: the light brightness detected by the second sensor 120 is less than a preset light brightness threshold. Referring to Figure 7 , the method includes steps S31 to S34.

[0115] Step S31 : acquiring the noise signal detected by the first sensor 110 and the light brightness detected by the second sensor 120 .

[0116] Step S32: Determine whether the current light brightness is less than a preset light brightness threshold. If not, proceed to step S33; if so, proceed to step S34.

[0117] Step S33: adjusting the rotation speeds of the compressor 1 and the fan 140 according to the noise signal.

[0118] Step S34: correcting the noise signal using the correction value obtained in advance, and adjusting the rotation speeds of the compressor 1 and the fan 140 according to the corrected noise signal.

[0119] 8 , in step S13 , the rotational speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal, including steps S133 to S134 .

[0120] Step S133: Obtain a corrected noise evaluation parameter according to the corrected noise signal.

[0121] Step S134: If the corrected noise evaluation parameter is greater than the preset noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to reduce their rotation speeds.

[0122] 9 , in step S12 , the rotational speeds of the compressor 1 and the fan 140 are adjusted according to the noise signal, including steps S121 to S122 .

[0123] Step S121: Acquire noise evaluation parameters according to the noise signal.

[0124] Step S122: If the noise evaluation parameter is greater than a preset noise evaluation parameter threshold, the compressor 1 and the fan 140 are controlled to reduce their rotation speeds.

[0125] 10 , in order to ensure the cooling effect of the refrigerator 100, in step S13, if the current environment satisfies the rest environment condition, the noise signal is corrected by a pre-acquired correction value, and the rotation speeds of the compressor 1 and the fan 140 are adjusted according to the corrected noise signal. Then, the method includes steps S14 to S15.

[0126] Step S14: Acquire the compartment temperature detected by the third sensor 130.

[0127] In step S15 , if the compartment temperature is greater than the preset temperature threshold, the speeds of the compressor 1 and the fan 140 are increased.

[0128] The refrigerator 100 and noise reduction method for the refrigerator 100 provided in some embodiments of the present disclosure, when preset resting environment conditions are met, correct the noise signal detected by the first sensor 110 and adjust the rotation speeds of the compressor 1 and the fan 140 based on the corrected noise signal. This can make the noise signal at this time more consistent with the noise value that can be actually perceived by humans and more in line with human subjective feelings. This avoids the situation where, under the same judgment criteria, the noise of the refrigerator 100 causes trouble to the user, but the refrigerator 100 does not perform the noise reduction operation.

[0129] It is understood that, in a resting environment, if the noise signal detected by the first sensor 110 is greater than a preset noise signal threshold, the refrigerator 100 is controlled to enter a noise reduction mode. In the noise reduction mode, the compressor 1 and the fan 140 are rotated at reduced speeds to keep the noise signal less than or equal to the noise signal threshold.

[0130] When the noise signal is less than or equal to the noise signal threshold, the noise signal will not affect the user's rest. In some embodiments, to ensure that the noise signal of the refrigerator 100 is always less than or equal to the noise signal threshold in a resting environment, the refrigerator 100 can enter a silent mode. In the silent mode, the compressor 1 and the fan 140 operate at a preset speed (e.g., the minimum speed) that can maintain the cooling performance of the refrigerator 100, thereby achieving a better silent effect.

[0131] The following describes the silent control process of the refrigerator by taking the rest environment condition including the light brightness detected by the second sensor 120 being less than the preset light brightness threshold, the noise evaluation parameter being the noise value, and the noise evaluation parameter threshold being the noise threshold as an example.

[0132] In some embodiments, the controller 200 is further configured to:

[0133] If the light brightness detected by the second sensor 120 is less than the preset light brightness threshold, and the noise value detected by the first sensor 110 is less than the preset noise threshold, the compressor 1 and the fan 140 are controlled to operate at a preset speed.

[0134] After the compressor 1 and the fan 140 operate at the preset speed for a first preset time, if the compartment temperature detected by the third sensor 130 is greater than a preset temperature threshold, the compressor 1 and the fan 140 are controlled to increase their speeds.

[0135] It is understandable that the preset rotation speed may be less than or equal to the current rotation speeds of the compressor 1 and the fan 140 .

[0136] In some embodiments of the present disclosure, whether the compressor 1 and the fan 140 need to run at high speed is determined based on the current compartment temperature, and the speed of the compressor 1 and the fan 140 is adjusted accordingly. This reduces noise while ensuring the refrigeration performance of the refrigerator 100, further satisfying the demand for quietness of the refrigerator 100.

[0137] It is understandable that the smaller the brightness and noise values, the more obvious the noise signal interference to the user. Therefore, the speed of the compressor 1 and the fan 140 of the refrigerator 100 needs to be lower. In some embodiments, the silent mode is divided into a first silent mode and a second silent mode. The controller 200 determines whether the refrigerator 100 enters the first silent mode or the second silent mode based on the brightness and noise values. The controller 200 is also configured to:

[0138] If the light brightness detected by the second sensor 120 is greater than or equal to a preset first light brightness threshold and less than a preset second light brightness threshold: if the noise value detected by the first sensor 120 is less than the preset first noise threshold, the refrigerator 100 is controlled to operate in the first silent mode. If the noise value is greater than or equal to the first noise threshold and less than a preset third noise threshold, the refrigerator 100 is controlled to operate in the second silent mode.

[0139] If the light brightness is less than the first light brightness threshold, if the noise value is less than a preset second noise threshold, the refrigerator 100 is controlled to operate in the first silent mode. If the noise value is greater than or equal to the second noise threshold and less than the third noise threshold, the refrigerator 100 is controlled to operate in the second silent mode.

[0140] It should be noted that in the first silent mode, the compressor 1 operates at a preset first compressor speed, and the fan 140 operates at a preset first fan speed. In the second silent mode, the compressor 1 operates at a preset second compressor speed, and the fan 140 operates at a preset second fan speed.

[0141] The second compressor speed is greater than the first compressor speed, the second fan speed is greater than the first fan speed, the third noise threshold is greater than the second noise threshold, and the second noise threshold is greater than the first noise threshold.

[0142] As shown in Table 1, the controller 200 can control the refrigerator 100 to enter different speed modes based on the environmental conditions identified by the second sensor 120 and the first sensor 110. It is understood that when the environment is dim or dark, it can be assumed that the user needs to rest, and the noise of the refrigerator 100 should be reduced to avoid disturbing the user's rest.

[0143] If the light brightness is greater than or equal to the preset first light brightness threshold and less than the preset second light brightness threshold, it is determined that the environment is in a dim state. At this time, if the noise level is less than 35dB, the compressor 1 and the fan 140 are controlled to operate at the first preset speed (including the first compressor speed and the first fan speed). If the noise level is ≥35dB and less than 60dB, the compressor 1 and the fan 140 are controlled to operate at the second preset speed (including the second compressor speed and the second fan speed).

[0144] If the brightness is less than the first brightness threshold, it is determined that the environment is dark. If the noise level is less than 45 dB, the compressor 1 and fan 140 are controlled to operate at the first preset speed. If the noise level is greater than or equal to 45 dB and less than 60 dB, the compressor 1 and fan 140 are controlled to operate at the second preset speed.

[0145] If the light brightness is greater than the first light brightness threshold, or the noise value is greater than or equal to 60 dB, the compressor 1 and the fan 140 are controlled to operate in a mode other than the silent mode.

[0146] It is understandable that the speeds of the compressor 1 and the fan 140 vary under different ambient temperatures. Under the condition that the preset compartment temperature is the same, the higher the ambient temperature, the greater the temperature difference between the inside and outside of the refrigerator 100 may be, and the faster the speeds of the compressor 1 and the fan 140.

[0147] It should be noted that the first preset speed may be lower than the corresponding speeds of the compressor 1 and the fan 140 in the cooling mode of the refrigerator 100 at a lower ambient temperature (e.g., 15°C). For example, the speed of the compressor 1 is 1200-1500 rpm, and the speed of the fan 140 is 800-900 rpm. The second preset speed may be equal to the corresponding speeds of the compressor 1 and the fan 140 in the cooling mode of the refrigerator 100 at a lower ambient temperature (e.g., 15°C). For example, the speed of the compressor 1 is 1800-2000 rpm, and the speed of the fan 140 is 1000-1100 rpm.

[0148] Table 1

[0149] In some embodiments, since the refrigerator 100 needs to quickly restore the compartment temperature in defrost mode, the defrost cycle needs to be avoided in silent mode to ensure the refrigerator 100's cooling effect. Furthermore, since the refrigerator 100 generates considerable noise in defrost mode, it may exceed the noise threshold. Therefore, if the rest environment conditions are met, the speeds of the compressor 1 and fan 140 need to be controlled separately in both cooling and defrost modes to reduce noise interference with the user.

[0150] In some embodiments, before determining whether the light brightness detected by the second sensor 120 is less than a preset light brightness threshold and whether the noise value detected by the first sensor 110 is less than a preset noise threshold, the controller 200 is further configured to:

[0151] If it is determined that the refrigerator 100 is in the defrost mode, the compressor 1 is controlled to operate at a preset third compressor speed, and the fan 140 is controlled to operate at a preset third fan speed.

[0152] If it is determined that the refrigerator is in a mode other than the defrost mode, it is determined whether the brightness detected by the second sensor 120 is less than a preset brightness threshold and whether the noise value detected by the first sensor 110 is less than a preset noise threshold.

[0153] Before entering silent mode, the controller 200 first determines whether the refrigerator 100 is in defrost mode. If the refrigerator 100 is defrosting, the controller 200 controls the compressor 1 and the fan 140 to operate at a third preset speed (including the third compressor speed and the third fan speed) during the defrost recovery period. This prevents any impact on the defrost process of the refrigerator 100.

[0154] It should be noted that the third preset speed is higher than the corresponding speeds of the compressor 1 and the fan 140 in the cooling mode of the refrigerator 100 at a lower ambient temperature (e.g., 15°C), and lower than the corresponding speeds of the compressor 1 and the fan 140 in the cooling mode of the refrigerator 100 at an ambient temperature of 23°C. For example, the speed of the compressor 1 is 2400-2600 rpm, and the speed of the fan 140 is 1200-1300 rpm.

[0155] It is understood that the third compressor speed is greater than the second compressor speed, the third fan speed is greater than the second fan speed, and the third preset speed is lower than the corresponding speeds of the compressor 1 and the fan 140 during the defrost recovery period of the refrigerator 100.

[0156] In this way, on the one hand, the temperature inside the refrigerator 100 can be effectively lowered, and on the other hand, the noise value of the refrigerator 100 during the defrost recovery period can be reduced to a certain extent, avoiding interference to users in a resting environment.

[0157] In some embodiments, the controller 200 is further configured to:

[0158] If it is determined that the refrigerator 100 is in the defrost mode, the compressor 1 is controlled to operate at a preset third compressor speed, and the fan 140 is controlled to operate at a preset third fan speed.

[0159] After the compressor 1 and the fan 140 operate at the current rotation speed for the first preset time period, it is determined whether the compartment temperature detected by the third sensor 130 is greater than the preset temperature threshold.

[0160] If so, the refrigerator 100 is controlled to run a preset control mode.

[0161] If not, the compressor 1 and the fan 140 are controlled to reduce the speed by one gear, and after the compressor 1 and the fan 140 are operated at the current preset speed for the first preset time, it is re-determined whether the compartment temperature detected by the third sensor 130 is greater than the preset temperature threshold.

[0162] Thus, when the compressor 1 and the fan 140 are operating at the third preset speed, if the temperature of the refrigerator compartment 100 is outside the preset temperature threshold range, the refrigerator 100 is controlled to operate in cooling mode, and the compressor 1 and the fan 140 are operated at the preset speed of the refrigerator 100 to reduce the temperature of the compartment. If the temperature of the refrigerator compartment 100 is within the preset temperature threshold range, the compressor 1 and the fan 140 are controlled to reduce the gear until they are reduced to the first preset speed.

[0163] In some embodiments, the controller 200 is further configured to:

[0164] If it is determined that the refrigerator 100 is in a mode other than the defrost mode, the current time of the environment in which the refrigerator 100 is located is acquired.

[0165] A first difference between the current time and the previous defrost time is calculated.

[0166] If the first difference is less than or equal to the preset first difference threshold, it is determined whether the brightness detected by the second sensor 120 is less than the preset brightness threshold, and whether the noise value detected by the first sensor 110 is less than the preset noise threshold.

[0167] If the first difference is greater than the first difference threshold, a second difference between the next defrost time and the current time is calculated.

[0168] If the second difference is less than or equal to a preset second difference threshold, it is determined whether the brightness detected by the second sensor 120 is less than a preset brightness threshold, and whether the noise value detected by the first sensor 110 is less than a preset noise threshold.

[0169] If the second difference is greater than the second difference threshold, it is determined whether the light brightness detected by the second sensor 120 is less than the preset light brightness threshold, and whether the noise value detected by the first sensor 110 is less than the preset noise threshold, and after the second preset time, the refrigerator 100 is controlled to run the preset control mode.

[0170] For example, the first difference threshold is 6 hours. If the refrigerator 100 is in a mode other than defrost mode, such as cooling mode, the first difference between the current time and the previous defrost time is calculated. If the first difference is less than or equal to 6 hours, it can be determined that the refrigerator 100 has been defrosted within a certain period of time. The information detected by the second sensor 120 and the first sensor 110 can then be used to determine whether the refrigerator 100 needs to enter silent mode.

[0171] If the first difference is greater than 6 hours, the second difference between the next defrost time and the current time is calculated. For example, the second difference threshold is 2 hours. If the second difference is less than or equal to 2 hours, it can be determined that the refrigerator 100 will be defrosted within a certain period of time in the future. The information detected by the second sensor 120 and the first sensor 110 is then maintained to determine whether the refrigerator 100 has entered the silent mode. After 2 hours, the refrigerator 100 is controlled to return to the defrost mode to ensure that the user enters a deep sleep state. At this time, the refrigerator 100 enters the defrost period and begins to defrost.

[0172] If the second difference is greater than 2 hours, it is sufficient to determine whether the refrigerator 100 enters the silent mode based on the information detected by the second sensor 120 and the first sensor 110.

[0173] It is understandable that the last defrost time refers to the time when the last defrost ended, and the next defrost time refers to the time when the next defrost starts. The second preset difference threshold may be less than or equal to the second preset time length.

[0174] In some embodiments, the controller 200 is further configured to:

[0175] The compressor 1 and the fan 140 are controlled to increase their speed by one gear.

[0176] After the compressor 1 and the fan 140 both operate at the currently increased speed for the first preset time period, if the compartment temperature detected by the third sensor 130 is greater than the preset temperature threshold, it is determined whether the currently increased speed is the preset third preset speed.

[0177] If so, the refrigerator 100 is controlled to run a preset control mode.

[0178] If not, the process returns to the step of controlling the compressor 1 and the fan 140 to increase the speed by one gear.

[0179] It can be understood that the third preset speed includes the third compressor speed and the third fan speed.

[0180] If the compartment temperature exceeds a preset temperature threshold when compressor 1 and fan 140 are running at the first or second preset speeds, the refrigerator 100's cooling performance is weak at that speed. In this case, the compressor 1 and fan 140 need to be increased by one speed. After the compressor 1 and fan 140 have been running at the increased speeds for a period of time, the difference between the compartment temperature and the preset temperature threshold is determined.

[0181] If the compartment temperature is less than or equal to the preset temperature threshold, the compressor 1 and the fan 140 are controlled to maintain the current speed and continue to operate until it is determined that the compartment temperature is greater than the preset temperature threshold. At this time, it indicates that the cooling performance of the refrigerator 100 is still insufficient at this gear, and it is necessary to continue to control the speed of the compressor 1 and the fan 140 to increase by one gear.

[0182] If the gear has reached the third preset speed, it means that the refrigerator refrigeration function cannot be maintained at the preset speed. Then the refrigerator 100 is controlled to enter a preset control mode, for example, the refrigerator 100 enters the cooling mode to ensure the cooling performance of the refrigerator 100.

[0183] In some embodiments, the housing 10 further has a receiving cavity configured to house components such as a compressor of the refrigerator 100. For example, the receiving cavity includes a compressor compartment.

[0184] In some embodiments, the refrigerator 100 further includes a first sub-blower 30, which is disposed in the compressor compartment and configured to dissipate heat from the compressor 1. When the light brightness detected by the second sensor 120 is less than a preset light brightness threshold, and the noise value detected by the first sensor 110 is less than a preset noise threshold, the controller 200 is further configured to:

[0185] The first sub-blower 30 is controlled to reduce its speed in a stepwise manner. For example, 100 rpm is one step, and the first sub-blower 30 can reduce its speed in units of 100 rpm.

[0186] After the first sub-blower 30 operates at the reduced speed for a third preset time period, it is determined whether the current energy consumption of the refrigerator 100 is less than or equal to a preset energy consumption threshold.

[0187] If so, continue to control the first sub-blower 30 to reduce its speed in a step-by-step manner.

[0188] If not, the first sub-blower 30 is controlled to increase its speed by one gear.

[0189] It is understandable that when compressor 1 operates at high speed, the temperature of the compressor compartment will rise. High temperatures increase the load on compressor 1, thereby increasing the energy consumption of refrigerator 100. Therefore, especially for refrigerators 100 with larger volumes, a first sub-blower 30 is installed in the compressor compartment to ensure heat dissipation within the compressor compartment, reducing the load on compressor 1 and the energy consumption of refrigerator 100.

[0190] During the process of controlling the first sub-blower 30 to step down its speed, if the current energy consumption of the refrigerator 100 is greater than the preset energy consumption threshold, it indicates that the compressor 1 is running at high speed and it is necessary to ensure that the first sub-blower 30 can dissipate heat from the compressor compartment. In this case, the controller 200 controls the first sub-blower 30 to increase its speed by one level.

[0191] If the current energy consumption of the refrigerator 100 is less than or equal to the preset energy consumption threshold, the first sub-blower 30 may continue to be controlled to reduce its speed in a step-by-step manner.

[0192] In some embodiments, after controlling the first sub-blower 30 to stepwise reduce the speed, the controller 200 is further configured to:

[0193] When the rotation speed of the first sub-blower 30 after being lowered is less than or equal to the preset shutdown rotation speed, the first sub-blower 30 is controlled to stop running.

[0194] Determine whether the current energy consumption of the refrigerator 100 is less than or equal to the energy consumption threshold.

[0195] If so, the first sub-blower 30 is controlled to remain in a stopped state.

[0196] If not, the first sub-blower 30 is controlled to increase its speed by one gear.

[0197] It is understandable that the use of the first sub-fan 30 is another major source of noise in the refrigerator 100. The operation of the first sub-fan 30 may increase the noise level by approximately 3dB. Therefore, if the current energy consumption of the refrigerator 100 is less than or equal to the preset energy consumption threshold while the first sub-fan 30 is running at a low speed, it indicates that the temperature of the compressor compartment is appropriate. At this time, if the speed of the first sub-fan 30 drops below the preset shutdown speed, the first sub-fan 30 can be shut down. The system then determines whether the energy consumption of the refrigerator 100 increases while the first sub-fan 30 is shut down.

[0198] In some embodiments, the refrigerator 100 further includes a second sub-blower 40 and a third sub-blower 50. The compartments include a refrigerating compartment and a freezing compartment. The second sub-blower 40 is disposed in a first ventilation duct connected to the refrigerating compartment and is configured to accelerate air circulation within the refrigerating compartment. The third sub-blower 50 is disposed in a second ventilation duct connected to the freezing compartment and is configured to accelerate air circulation within the freezing compartment.

[0199] When the light brightness detected by the second sensor 120 is less than a preset light brightness threshold, and the noise value detected by the first sensor 110 is less than a preset noise threshold, the controller 200 is further configured to:

[0200] The second sub-blower 40 and the third sub-blower 50 are controlled to reduce their rotation speeds in a step-by-step manner.

[0201] After the second sub-blower 40 and the third sub-blower 50 operate at the reduced speed for a fourth preset time period, it is determined whether the compartment temperature is less than or equal to the preset temperature threshold.

[0202] If so, the second sub-blower 40 and the third sub-blower 50 are continuously controlled to reduce their rotation speeds in a step-by-step manner.

[0203] If not, the second sub-blower 40 and the third sub-blower 50 are controlled to increase their rotational speed by one gear.

[0204] It is understandable that, while ensuring the compartment temperature, controlling the second sub-fan 40 and the third sub-fan 50 to reduce their rotation speeds in a step-by-step manner can further reduce the noise level of the refrigerator 100 .

[0205] In some embodiments, the refrigerator 100 further includes a vacuum component, an ice-making component, and a humidification component. The controller 200 is further configured to stop using these components or extend the interval between their use, thereby further reducing or lowering the noise level of the refrigerator 100.

[0206] In some embodiments, the controller 200 is further configured to:

[0207] If the compressor 1 and the fan 140 are in the startup phase, the compressor 1 and the fan 140 are controlled to start step by step to a preset speed, so that the compressor 1 and the fan 140 continue to operate at the preset speed.

[0208] If the compressor 1 and the fan 140 are in the operation stage, the compressor 1 and the fan 140 are controlled to operate according to the preset speed.

[0209] It is understandable that the compressor 1 and fan 140 will produce a prominent start-up and stop sound when starting and stopping. If the instantaneous start-up and stop sound is too loud, it will also have a significant impact on the user's rest. Therefore, the compressor 1 and fan 140 adopt a step-by-step start-up to the preset speed to reduce the noise during the instantaneous start-up of the compressor 1 and fan 140.

[0210] Some embodiments of the present disclosure further provide a noise reduction method for a refrigerator 100. Referring to FIG11 , the noise reduction method for the refrigerator 100 includes:

[0211] In step S1 , if it is determined that the light brightness detected by the second sensor 120 is less than a preset light brightness threshold, and the noise value detected by the first sensor 110 is less than a preset noise threshold, the compressor 1 and the fan 140 are controlled to operate at a preset speed.

[0212] Step S2: After the compressor 1 and the fan 140 are operated at the preset speed for a first preset time, if it is determined that the compartment temperature detected by the third sensor is greater than a preset temperature threshold, the compressor 1 and the fan 140 are controlled to increase their speeds.

[0213] 12 , the method includes steps S41 to S46 .

[0214] Step S41 , obtaining the light brightness detected by the second sensor 120 and the noise value detected by the first sensor 110 .

[0215] Step S42 , determining whether the current light brightness is less than a preset light brightness threshold, and whether the current noise value is less than a preset noise threshold.

[0216] Step S43: Control the compressor 1 and the fan 140 to operate at a preset speed.

[0217] Step S44: Determine whether the compressor 1 and the fan 140 have been running at the preset speed for a first preset time period. If so, proceed to step S45; if not, return to step S44.

[0218] In step S45, it is determined whether the compartment temperature detected by the third sensor 130 is greater than a preset temperature threshold. If so, step S46 is executed; if not, the process returns to step S45.

[0219] Step S46: Control the compressor 1 and the fan 140 to increase their rotation speed.

[0220] 13 , step S1 , if it is determined that the light brightness detected by the second sensor 120 is less than a preset light brightness threshold, and the noise value detected by the first sensor 110 is less than a preset noise threshold, the compressor 1 and the fan 140 are controlled to operate at a preset speed, including steps S101 to S111 .

[0221] Step S101: Obtain current brightness and noise values.

[0222] Step S102: Determine whether the current light brightness is less than a preset first light brightness threshold. If yes, proceed to step S103; if no, proceed to step S107.

[0223] Step S103: Determine whether the current noise value is less than a preset second noise threshold. If yes, execute step S104; if no, execute step S105.

[0224] Step S104: Control the refrigerator 100 to operate in the first silent mode.

[0225] Step S105: Determine whether the current noise value is less than a preset third noise threshold. If yes, proceed to step S106; if no, terminate the process.

[0226] Step S106, controlling the refrigerator 100 to operate in the second silent mode.

[0227] Step S107: Determine whether the current light brightness is less than a preset second light brightness threshold. If yes, proceed to step S108; if no, terminate the process.

[0228] Step S108: Determine whether the current noise value is less than a preset first noise threshold. If yes, execute step S109; if not, execute step S110.

[0229] Step S109: Control the refrigerator 100 to operate in the first silent mode.

[0230] Step S110: Determine whether the current noise value is less than a preset third noise threshold. If yes, proceed to step S111; if no, terminate the process.

[0231] Step S111, controlling the refrigerator 100 to operate in the second silent mode.

[0232] 14 , before the step S41 of acquiring the light brightness detected by the second sensor 120 and the noise value detected by the first sensor 110 , the method further includes steps S51 to S52 .

[0233] Step S51, determining whether the refrigerator 100 is in defrost mode. If yes, proceed to step S52, if not, proceed to step S41.

[0234] Step S52: Control the compressor 1 to operate at a preset third compressor speed, and control the fan 140 to operate at a preset third fan speed.

[0235] 15 , step S52 controls the compressor 1 to operate at a preset third compressor speed, and controls the fan 140 to operate at a preset third fan speed, including steps S521 to S525 .

[0236] In step S521, if it is determined that the refrigerator 100 is in the defrost mode, the compressor 1 is controlled to operate at a preset third compressor speed, and the fan 140 is controlled to operate at a preset third fan speed.

[0237] Step S522: After the compressor 1 and the fan 140 are operated at the current preset speed for the first preset time period, the compartment temperature detected by the third sensor 130 is obtained.

[0238] Step S523: Determine whether the current compartment temperature is greater than the preset temperature threshold. If so, proceed to step S525; if not, proceed to step S524.

[0239] In step S524, the compressor 1 and the fan 140 are controlled to reduce their speed by one gear, and the process returns to step S522.

[0240] Step S525: Control the refrigerator 100 to run a preset control mode.

[0241] 16 , the method further includes steps S61 to S66 .

[0242] Step S61: If it is determined that the refrigerator 100 is in a mode other than the defrost mode, the current time of the environment in which the refrigerator 100 is located is obtained.

[0243] Step S62: Calculate a first difference between the current time and the previous defrost time.

[0244] Step S63: Determine whether the first difference is less than or equal to a preset first difference threshold. If yes, proceed to step S41; if no, proceed to step S64.

[0245] Step S64, calculating a second difference between the next defrost time and the current time.

[0246] Step S65: Determine whether the second difference is less than or equal to a preset second difference threshold. If yes, proceed to step S66; if no, proceed to step S41.

[0247] Step S66, enter step S41, and control the refrigerator 100 to run the preset control mode after the second preset time.

[0248] 17 , the method includes steps S71 to S80 .

[0249] Step S71 , obtaining the light brightness detected by the second sensor 120 and the noise value detected by the first sensor 110 .

[0250] Step S72 , determining whether the current light brightness is less than a preset light brightness threshold, and whether the current noise value is less than a preset noise threshold.

[0251] Step S73: Control the compressor 1 and the fan 140 to operate at a preset speed.

[0252] Step S74: Determine whether the compressor 1 and the fan 140 have been running at the preset speed for the first preset time. If so, proceed to step S75; if not, return to step S74.

[0253] In step S75, it is determined whether the compartment temperature detected by the third sensor 130 is greater than a preset temperature threshold. If so, step S76 is executed; if not, the process returns to step S75.

[0254] Step S76: Control the compressor 1 and the fan 140 to increase their speed by one gear.

[0255] Step S77: Determine whether the compressor 1 and the fan 140 have been running at the currently increased speed for the first preset time period. If so, proceed to step S78; if not, return to step S77.

[0256] In step S78, it is determined whether the compartment temperature detected by the third sensor 130 is greater than the preset temperature threshold. If so, step S79 is executed; if not, the process returns to step S78.

[0257] Step S79: Determine whether the currently increased speed is the third preset speed. If so, proceed to step S80; if not, return to step S76.

[0258] Step S80: Control the refrigerator 100 to run a preset control mode.

[0259] 18 , the method includes steps S901 to S906 .

[0260] Step S901 : acquiring the light brightness detected by the second sensor 120 and the noise value detected by the first sensor 110 .

[0261] In step S902, it is determined whether the current brightness is less than a preset brightness threshold and whether the current noise value is less than a preset noise threshold. If yes, step S903 is executed; if not, the process returns to step S902.

[0262] Step S903: Control the first sub-blower 30 to reduce its speed in a stepwise manner, and start timing.

[0263] Step S904: Determine whether the first sub-blower 30 has been running at the reduced speed for a third preset time period. If so, proceed to step S905; if not, return to step S904.

[0264] Step S905, determining whether the current energy consumption of the refrigerator 100 is less than or equal to a preset energy consumption threshold, if so, returning to step S903, if not, executing step S906.

[0265] Step S906 , controlling the first sub-blower 30 to increase its speed by one gear.

[0266] 19 , the method further includes steps S911 to S914 .

[0267] In step S911 , if the reduced speed of the first sub-blower 30 is less than or equal to the preset shutdown speed, the first sub-blower 30 is controlled to stop running.

[0268] Step S912: Determine whether the current energy consumption of the refrigerator 100 is less than or equal to the preset energy consumption threshold. If yes, execute step S913; if not, execute step S914.

[0269] Step S913: Control the first sub-blower 30 to remain in a shutdown state.

[0270] Step S914: Control the first sub-blower 30 to increase its speed by one gear.

[0271] 20 , the method further includes steps S921 to S925 .

[0272] Step S921 , obtaining the light brightness detected by the second sensor 120 and the noise value detected by the first sensor 110 .

[0273] In step S922, it is determined whether the current light brightness is less than a preset light brightness threshold and whether the current noise is less than a preset noise threshold. If yes, step S923 is executed; if not, the process returns to step S922.

[0274] Step S923 , controlling the second sub-blower 40 and the third sub-blower 50 to reduce their rotation speeds in a stepwise manner, and starting timing.

[0275] Step S924: Determine whether the second sub-fan 40 and the third sub-fan 50 are both running at the reduced speed for a fourth preset time period. If so, return to step S923; if not, proceed to step S925.

[0276] Step S925 , controlling the second sub-blower 40 and the third sub-blower 50 to increase their rotational speed by one gear.

[0277] 21 , the method further includes steps S1001 to S1003 .

[0278] In step S1001 , the light brightness detected by the second sensor 120 is less than a preset light brightness threshold, and the noise value detected by the first sensor 110 is less than a preset noise threshold.

[0279] Step S1002: If the compressor 1 and the fan 140 are in the startup phase, the compressor 1 and the fan 140 are controlled to start stepwise to a preset speed, so that the compressor 1 and the fan 140 continue to operate at the preset speed.

[0280] Step S1003: If the compressor 1 and the fan 140 are in the operation stage, the compressor 1 and the fan 140 are controlled to operate at the preset speed.

[0281] The refrigerator 100 and the noise reduction method for the refrigerator 100 provided in some embodiments of the present disclosure detect the brightness and noise level of the environment in which the refrigerator 100 is located through the second sensor 120 and the first sensor 110, thereby controlling the compressor 1 and the fan 140 of the refrigerator 100 to operate at a preset speed, so that the refrigerator 100 enters a silent mode. In this way, the noise level of the refrigerator 100 during operation is reduced, avoiding interference with the user in a resting environment. In addition, by adjusting the speed of the compressor 1 and the fan 140 according to the compartment temperature, the cooling function of the refrigerator 100 can be guaranteed without affecting the user's rest.

[0282] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A refrigerator, comprising: A box body, wherein the box body has a compartment; A door body configured to open or close the compartment; A compressor is arranged in the box; A fan is arranged in the box; A first sensor is disposed on the housing and configured to detect a noise signal of an environment in which the refrigerator is located; as well as A controller, the controller being configured to: Acquiring a noise signal detected by the first sensor; If it is determined that the preset rest environment condition is not met, adjusting the rotation speeds of the compressor and the fan according to the noise signal; If it is determined that the rest environment condition is met, the noise signal is corrected using a pre-acquired correction value, and the rotation speeds of the compressor and the fan are adjusted according to the corrected noise signal.

2. The refrigerator according to claim 1, wherein: The controller is also configured to: Obtaining a first noise average value, a second noise average value, and a preset coefficient corresponding to the nominal noise of the refrigerator; Calculating the correction value according to the first noise average value, the second noise average value and the coefficient; The first noise average value is the average value of all noise signals detected by the first sensor within a preset time period and when it is determined that the rest environment condition is not met; The second noise average value is the average value of all noise signals detected by the first sensor within the preset time period and when it is determined that the rest environment condition is met; The refrigerator noise rating is positively correlated with the coefficient.

3. The refrigerator according to claim 2, wherein: The controller is also configured to: Calculating an absolute value of a difference between the first noise average value and the second noise average value; The absolute value is divided by the coefficient to obtain the correction value.

4. The refrigerator according to any one of claims 1 to 3, wherein: The rest environment condition includes: the current time is within a preset night time range.

5. The refrigerator according to any one of claims 1 to 4, wherein: The refrigerator further comprises a second sensor, which is disposed on the housing and is configured to detect the brightness of the environment in which the refrigerator is located; The rest environment condition includes: the current light brightness is less than a preset light brightness threshold.

6. The refrigerator according to any one of claims 1 to 5, wherein: The controller is also configured to: According to the corrected noise signal, obtaining a corrected noise evaluation parameter; If it is determined that the corrected noise evaluation parameter is greater than a preset noise evaluation parameter threshold, the compressor and the fan are controlled to reduce their rotation speeds.

7. The refrigerator according to any one of claims 1 to 6, wherein: The controller is also configured to: Acquiring a noise evaluation parameter according to the noise signal; If it is determined that the noise evaluation parameter is greater than a preset noise evaluation parameter threshold, the compressor and the fan are controlled to reduce their rotation speeds.

8. The refrigerator according to claim 5, further comprising: A third sensor is disposed in the box and is configured to detect the compartment temperature of the refrigerator; The controller is also configured to: Acquire the noise value detected by the first sensor and the light brightness detected by the second sensor; If it is determined that the light brightness is less than the preset light brightness threshold and the noise value is less than the preset noise threshold, the control The compressor and the fan operate at a preset speed; After the compressor and the fan are operated at the preset speed for a first preset time, obtaining the compartment temperature detected by the third sensor; If it is determined that the compartment temperature is greater than a preset temperature threshold, the compressor and the fan are controlled to increase their rotation speeds.

9. The refrigerator according to claim 8, wherein: The controller is also configured to: When the light brightness is greater than or equal to a preset first light brightness threshold and less than a preset second light brightness threshold: If it is determined that the noise value is less than a preset first noise threshold, controlling the refrigerator to operate in a first silent mode; If it is determined that the noise value is greater than or equal to the first noise threshold and less than a preset third noise threshold, controlling the refrigerator to operate in a second silent mode; When the light brightness is less than the first light brightness threshold: If it is determined that the noise value is less than a preset second noise threshold, controlling the refrigerator to operate in the first silent mode; If it is determined that the noise value is greater than or equal to the second noise threshold and less than the third noise threshold, controlling the refrigerator to operate in the second silent mode; Wherein, in the first silent mode, the compressor operates at a preset first compressor speed, and the fan operates at a preset first fan speed; In the second silent mode, the compressor operates at a preset second compressor speed, and the fan operates at a preset second fan speed; Wherein, the third noise threshold is greater than the second noise threshold, and the second noise threshold is greater than the first noise threshold; The second compressor speed is greater than the first compressor speed, and the second fan speed is greater than the first fan speed.

10. The refrigerator according to claim 9, wherein: Before acquiring the light brightness detected by the second sensor and the noise value detected by the first sensor, the controller is further configured to: If it is determined that the refrigerator is in the defrost mode, the compressor is controlled to operate at a preset third compressor speed, and the fan is controlled to operate at a preset third fan speed; wherein the third compressor speed is greater than the second compressor speed, and the third fan speed is greater than the second fan speed; If it is determined that the refrigerator is in a mode other than the defrost mode, it is determined whether the light brightness detected by the second sensor is less than a preset light brightness threshold, and whether the noise value detected by the first sensor is less than a preset noise threshold.

11. The refrigerator according to claim 10, wherein: If it is determined that the refrigerator is in the defrost mode, the compressor is controlled to operate at a preset third compressor speed, and the fan is controlled to operate at a preset third fan speed, and the controller is further configured to: After the compressor and the fan are operated at the current rotation speed for the first preset time, acquiring the compartment temperature detected by the third sensor; If it is determined that the compartment temperature is greater than the preset temperature threshold, controlling the refrigerator to operate in a preset control mode; If it is determined that the compartment temperature is less than or equal to the preset temperature threshold, controlling the compressor and the fan to reduce the speed; After the compressor and the fan are operated at the current rotation speed for the first preset time period, it is determined again whether the compartment temperature detected by the third sensor is greater than the preset temperature threshold.

12. The refrigerator according to claim 10 or 11, wherein: The controller is also configured to: If it is determined that the refrigerator is in a mode other than the defrost mode, obtaining the current time of the environment in which the refrigerator is located; Calculating a first difference between the current time and the previous defrost time; If the first difference is less than or equal to a preset first difference threshold, determining whether the light brightness detected by the second sensor is less than a preset light brightness threshold, and whether the noise value detected by the first sensor is less than a preset noise threshold; If the first difference is greater than the first difference threshold, calculating a second difference between the next defrost time and the current time; If the second difference is less than or equal to a preset second difference threshold, determining whether the light brightness detected by the second sensor is less than a preset light brightness threshold, and whether the noise value detected by the first sensor is less than a preset noise threshold; If the second difference is greater than the second difference threshold, it is determined whether the light brightness detected by the second sensor is less than the preset light brightness threshold, and whether the noise value detected by the first sensor is less than the preset noise threshold, and the refrigerator is controlled to operate in the preset control mode after a second preset time.

13. The refrigerator according to any one of claims 10 to 12, wherein: The controller is also configured to: Controlling the compressor and the fan to increase the rotation speed; After the compressor and the fan are respectively operated at the currently increased speed for the first preset time period, if it is determined that the compartment temperature detected by the third sensor is greater than the preset temperature threshold, determining whether the currently increased speed is the third preset speed; If yes, controlling the refrigerator to run the preset control mode; If not, control the compressor and the fan to increase their speed; Wherein, the third preset speed includes the third compressor speed and the third fan speed.

14. The refrigerator according to any one of claims 8 to 13, further comprising: A first sub-blower is disposed in a compressor compartment in which the compressor is installed and is configured to dissipate heat from the compressor; The controller is also configured to: When the light brightness detected by the second sensor is less than a preset light brightness threshold, and the noise value detected by the first sensor is less than a preset noise threshold, controlling the first sub-blower to reduce its speed in a stepwise manner; After the first sub-fan is operated at the reduced speed for a third preset time, obtaining the current energy consumption of the refrigerator; If it is determined that the current energy consumption of the refrigerator is less than or equal to the preset energy consumption threshold, continue to control the first sub-fan to step down its speed; If it is determined that the current energy consumption of the refrigerator is greater than a preset energy consumption threshold, the first sub-fan is controlled to increase its speed.

15. The refrigerator according to claim 14, wherein: After controlling the first sub-blower to stepwise reduce the rotation speed, the controller is further configured to: If it is determined that the speed of the first sub-blower after being lowered is less than or equal to the preset shutdown speed, controlling the first sub-blower to stop running; If it is determined that the current refrigerator energy consumption is less than or equal to the preset energy consumption threshold, controlling the first sub-blower to remain in a shutdown state; If it is determined that the current energy consumption of the refrigerator is greater than the preset energy consumption threshold, the first sub-blower is controlled to increase its speed.

16. The refrigerator according to any one of claims 8 to 15, wherein: The compartments include a freezer compartment and a refrigerator compartment; the refrigerator also includes: a second sub-blower, disposed in a first ventilation duct connected to the refrigerating chamber and configured to accelerate air circulation in the refrigerating chamber; and a third sub-blower, disposed in a second ventilation duct connected to the freezing chamber and configured to accelerate air circulation in the freezing chamber; When the light brightness detected by the second sensor is less than a preset light brightness threshold, and the noise value detected by the first sensor is less than a preset noise threshold, the controller is further configured to: Controlling the second sub-fan and the third sub-fan to reduce their rotation speeds in a step-by-step manner; After the second sub-fan and the third sub-fan are operated at the reduced speed for a fourth preset time, obtaining the compartment temperature; If it is determined that the compartment temperature is less than or equal to the preset temperature threshold, continue to control the second sub-fan and the third sub-fan to step down their speeds; If it is determined that the compartment temperature is greater than the preset temperature threshold, the second sub-blower and the third sub-blower are controlled to increase their rotation speeds.

17. A method for reducing noise of a refrigerator, wherein: The refrigerator comprises: A box body, wherein the box body has a compartment; A door body configured to open or close the compartment; A compressor is arranged in the box; A fan is disposed in the box; and The first sensor is provided in the box and is configured to detect a noise signal of an environment in which the refrigerator is located; the noise reduction method of the refrigerator comprises: Acquiring a noise signal detected by the first sensor; If the preset rest environment conditions are not met, adjusting the rotation speeds of the compressor and the fan according to the noise signal; If the rest environment condition is met, the noise signal is corrected by using a correction value obtained in advance, and the rotation speeds of the compressor and the fan are adjusted according to the corrected noise signal.

18. The method according to claim 17, wherein: The correction value is obtained by following the steps below: Obtaining a first noise average value, a second noise average value, and a preset coefficient corresponding to the nominal noise of the refrigerator; The correction value is calculated based on the first noise average value, the second noise average value and the coefficient; wherein, The first noise average value is an average value of all noise signals detected by the first sensor within a preset time period and under the condition that the rest environment condition is not met; The second noise average value is the average value of all noise signals detected by the first sensor within the preset time period and under the condition that the rest environment condition is met; The refrigerator noise rating is positively correlated with the coefficient.

19. The method according to claim 18, wherein: The calculating the correction value according to the first noise average value, the second noise average value and the coefficient includes: Calculating an absolute value of a difference between the first noise average value and the second noise average value; The absolute value is divided by the coefficient to obtain the correction value.

20. The method according to any one of claims 17 to 19, wherein: The refrigerator further comprises: a second sensor, disposed on the housing and configured to detect the brightness of the environment in which the refrigerator is located; and A third sensor is disposed in the box and is configured to detect the compartment temperature in the refrigerator compartment; wherein the noise reduction method of the refrigerator includes: If it is determined that the noise value detected by the first sensor is less than a preset noise threshold, and the light brightness detected by the second sensor is less than a preset light brightness threshold, controlling the compressor and the fan to operate at a preset speed; After determining that the compressor and the fan are running at the preset speed for a first preset time, if the compartment temperature detected by the third sensor is greater than a preset temperature threshold, the compressor and the fan are controlled to increase their speeds.

Images