Refrigerator and refrigerator sound quality control method

Abstract

The invention discloses a refrigerator and a refrigerator sound quality control method, and the refrigerator comprises a sound sensor which is used for collecting an environment sound signal; the sound quality control system comprises a sound quality control signal input by a user, a loudspeaker used for outputting a sound signal, and a controller used for responding to the sound quality control signal input by the user and calculating the current background sound pressure according to the collected environment sound signal; when the current background sound pressure is larger than a preset first threshold value and is not larger than a preset second threshold value, the current operation state of the refrigerator is detected, and the current operation state comprises current operation parts of the refrigerator; and matching a corresponding masking sound in a preset masking sound library according to the current operation state, and controlling the loudspeaker to output the masking sound. By judging the background sound pressure, when the background sound pressure is within a certain range, the operation noise of the refrigerator can be accurately masked through the masking sound matched with the current operation state, and the influence of other environments on masking sound output is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a refrigerator sound quality control method. Background Art

[0002] Refrigerators are household appliances that provide low-temperature storage. They can store food at low temperatures by opening and closing the door. Although the noise level of refrigerators is getting lower and lower, and the noise level of most high-end products is less than 36dB, the noise during the defrost recovery period and quick freezing mode of refrigerators is still relatively high, which is easy to cause user complaints.

[0003] Among the existing sound quality control solutions, there is a technical solution that uses the masking effect to eliminate noise, that is, by actively generating a masking sound signal corresponding to the noise, when multiple sounds exist at the same time, the auditory field shifts, and the user's audibility of any of the sounds decreases. However, this noise control solution in the existing technology relies on real-time analysis of the noise signal and real-time output of the corresponding masking sound signal. Affected by the power consumption and computing power requirements of the product, the sound quality control effect is not ideal. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a refrigerator and a refrigerator sound quality control method, which can efficiently realize refrigerator sound quality control without real-time analysis of noise signals.

[0005] An embodiment of the present invention provides a refrigerator, comprising:

[0006] Sound sensor, used to collect environmental sound signals;

[0007] A speaker, for outputting sound signals;

[0008] Controller for:

[0009] In response to a sound quality control signal input by a user, a current background sound pressure is calculated according to the collected ambient sound signal;

[0010] When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator;

[0011] A corresponding masking sound is matched in a preset masking sound library according to the current running state, and the speaker is controlled to output the masking sound.

[0012] Preferably, the masking sound library includes corresponding masking sounds generated according to noises generated when different operating parts of the refrigerator are in operation, and / or corresponding masking sounds generated according to noises generated when the refrigerator is in different operating modes.

[0013] As a preferred solution, the controller is also used for:

[0014] When the current background sound pressure is not greater than the first threshold, controlling the refrigerator to enter a preset stable operation mode;

[0015] When the current background sound pressure is greater than the second threshold, the current operating state of the refrigerator is maintained.

[0016] Preferably, the controller is further used for:

[0017] When the current operating state meets the preset operating conditions of the stable operating mode, the ambient sound signal is calculated according to a preset sound quality evaluation model to obtain a current sound quality score;

[0018] When the current sound quality score is not greater than a preset third threshold, a first masking sound corresponding to the stable operation mode is matched in the masking sound library, and the speaker is controlled to output the first masking sound.

[0019] Preferably, the controller is further used for:

[0020] When the current operating state meets the operating condition preset in the stop mode or the operating condition preset in the standby mode, the speaker is controlled to stop outputting the masking sound.

[0021] Preferably, the controller is further used for:

[0022] When the current operating state meets the preset operating conditions of the quick-freezing operating mode, a second masking sound corresponding to the quick-freezing operating mode is matched in the masking sound library, and the speaker is controlled to output the second masking sound.

[0023] As a preferred solution, the refrigerator further comprises:

[0024] A vacuum device, used for vacuuming the storage room or storage box in the refrigerator;

[0025] The controller is also used for:

[0026] When the currently operating component in the current operating state includes the vacuum device, a corresponding third masking sound is matched in a preset masking sound library, and the speaker is controlled to output the third masking sound.

[0027] As a preferred solution, the refrigerator further comprises:

[0028] A damper, used to adjust the cooling capacity of the cold air in the refrigerator compartment;

[0029] The controller is also used for:

[0030] When the currently operating component in the current operating state includes the damper, a corresponding fourth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fourth masking sound.

[0031] Preferably, the refrigerator further comprises:

[0032] An electric switching valve, used to control the flow direction of the refrigerant in the refrigerator refrigeration system;

[0033] The controller is also used for:

[0034] When the currently operating component in the current operating state includes the electric switching valve, a corresponding fifth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fifth masking sound.

[0035] An embodiment of the present invention further provides a refrigerator sound quality control method, the refrigerator comprising:

[0036] Sound sensor, used to collect environmental sound signals;

[0037] A speaker, for outputting sound signals;

[0038] Controller;

[0039] The method comprises:

[0040] In response to a sound quality control signal input by a user, a current background sound pressure is calculated according to the collected ambient sound signal;

[0041] When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator;

[0042] A corresponding masking sound is matched in a preset masking sound library according to the current running state, and the speaker is controlled to output the masking sound.

[0043] Compared with the prior art, the refrigerator and refrigerator sound quality control method disclosed in the present invention, the refrigerator includes a sound sensor for collecting environmental sound signals; a speaker for outputting sound signals, and a controller, the controller is used to: respond to the sound quality control signal input by the user, calculate the current background sound pressure according to the collected environmental sound signal; when the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detect the current operating state of the refrigerator, the current operating state includes the current operating components of the refrigerator; match the corresponding masking sound in the preset masking sound library according to the current operating state, and control the speaker to output the masking sound. By judging the background sound pressure, when the background sound pressure is within a certain range, the corresponding masking sound output is matched, when the background sound pressure is too low or too high, the corresponding masking sound output is not required, and the masking sound matched by the current operating state can be output according to the operating state of the refrigerator, without real-time noise analysis, and real-time output of the masking sound can accurately achieve the masking of the refrigerator operating noise, and exclude the influence of other environments on the masking sound output. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a structural schematic diagram of a refrigerator provided by an embodiment of the present invention;

[0045] Figure 2 is a schematic diagram of the refrigeration system structure of a refrigerator provided in an embodiment of the present invention;

[0046] Figure 3 is a structural schematic diagram of the working state of a refrigerator provided by an embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of a control flow of the controller provided by the present invention in the first embodiment;

[0048] Figure 5 is a schematic diagram of a control flow of the work performed by the controller in the first embodiment provided by the present invention;

[0049] Figure 6 is a schematic diagram of a control flow of work performed by a controller in a third embodiment provided by the present invention;

[0050] Figure 7 is a schematic diagram of a control flow of work performed by a controller in a fourth embodiment provided by the present invention;

[0051] Figure 8 is a schematic diagram of a control flow of work performed by a controller in a fifth embodiment provided by the present invention;

[0052] Fig. 9 is a control flow diagram of the work performed by the controller in the sixth embodiment provided by the present invention;

[0053] Fig.10 It is a structural schematic diagram of the working state of a refrigerator provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] See also Figure 1 , is a structural schematic diagram of a refrigerator provided by an embodiment of the present invention. The embodiment of the present invention provides a refrigerator, including a box body 101, in which a storage chamber 102 is provided, including a refrigerator chamber and / or a freezer chamber for storing items with preservation or freezing requirements, and also includes a refrigeration system 104 for performing refrigeration operations of the refrigerator.

[0059] It should be noted that the refrigerator performs refrigeration operation through the refrigeration system to provide cold energy to the storage chamber so as to maintain the storage chamber at a constant low temperature. Figure 2 , is a schematic diagram of the refrigeration system structure of the refrigerator provided in an embodiment of the present invention, the refrigeration system is composed of a compressor 201, a condenser 202, a drying filter 203, a capillary 204, and an evaporator 205, and the working structure of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process.

[0060] The compression process is as follows: plug in the power cord of the refrigerator, and when the box has a cooling demand, the compressor starts working, and the low-temperature, low-pressure refrigerant is sucked into the compressor, compressed into a high-temperature, high-pressure superheated gas in the compressor cylinder, and then discharged into the condenser; the condensation process is as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser, the temperature continues to drop, and is gradually cooled to a saturated vapor at room temperature and high pressure, and further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature. The pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows: the condensed refrigerant saturated liquid flows into the capillary after the moisture and impurities are filtered out by the drying filter, and the refrigerant is throttled and depressurized through it, and the refrigerant becomes a wet vapor at room temperature and low pressure; the evaporation process is as follows: it then begins to absorb heat and vaporize in the evaporator, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator returns to the compressor again, repeating the above process, transferring the heat in the refrigerator to the air outside the box, and achieving the purpose of refrigeration.

[0061] It should be noted that the above embodiment is only a specific structure and working principle of a conventional refrigerator. The refrigerator disclosed in this embodiment may also have the structure of the above-mentioned existing refrigerator to achieve corresponding functions.

[0062] When the refrigerator is powered on, the refrigeration system will continue to work and generate noise. Especially when certain components of the refrigerator are in operation, it will generate louder noise, which will have a certain impact on the user's life, study, work or sleep. Therefore, controlling the sound quality of the refrigerator and reducing the impact of the refrigerator noise on the user can improve the user experience.

[0063] As a technical solution for sound quality control, the masking effect can reduce the impact of noise on users. The masking effect refers to the phenomenon that due to the simultaneous presence of two or more sounds, the hearing range is shifted, resulting in a decrease in the audibility of any of the sounds. The fraction by which the hearing threshold is increased due to noise masking is called the masking value. For example, a pure tone with a frequency of 800Hz can be heard by normal people when the sound pressure level is 0dB, that is, the hearing threshold of a pure tone of 800Hz is 0dB. However, in an environment with 70dB noise, the sound pressure level of a pure tone of 800Hz must be increased to 75dB to be heard, and the decibel increase in the hearing threshold is 75dB, that is, 75dB-0dB. Therefore, it is considered that the masking value of this noise for a pure tone of 800Hz is 75dB. Masking does not simply mean that one cannot hear. The loss of auditory details of any sound can be regarded as masking. Therefore, when sound A masks sound B, sound B may also mask sound A, but the degree of auditory perception may be different.

[0064] Therefore, the sound quality of the refrigerator can be controlled based on the masking effect. However, the current existing control method needs to generate corresponding masking sound output based on the real-time analysis of the noise to achieve corresponding noise control.

[0065] However, this method requires certain analytical computing capabilities of the controller. When the environmental noise is more complex, masking the noise output requires a large controller cost and occupies computing power, and the accuracy is low, resulting in the masking effect not being obvious.

[0066] In view of the above problems in the prior art, the present application proposes a refrigerator. Figure 3 , is a structural diagram of the working state of a refrigerator provided in an embodiment of the present invention; the refrigerator 100 includes a controller 300, a sound sensor 301 and a speaker 302;

[0067] The sound sensor 301 is used to collect the environmental sound signal around the refrigerator; the speaker 302 is used to output sound information, and the sound signal is a masking sound signal used to mask the operating noise of the refrigerator.

[0068] It should be noted that the sound sensor can be specifically a microphone, which is arranged outside the refrigerator housing and is used to collect environmental sound signals, including noise sounds generated by the operation of the refrigerator.

[0069] It should be noted that the speaker is essentially a sound playing device and can be replaced by other devices in other embodiments.

[0070] For the specific process of the controller to perform the sound quality control function, see Figure 4 , is a schematic diagram of a control flow of a controller provided by the present invention in a first embodiment, wherein the controller is configured to perform the following steps:

[0071] S1, in response to a sound quality control signal input by a user, calculating a current background sound pressure according to a collected ambient sound signal;

[0072] S2, when the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator;

[0073] S3, matching a corresponding masking sound in a preset masking sound library according to the currently running component, and controlling the speaker to output the masking sound.

[0074] When the controller is working, after the user starts the sound quality control function, that is, after receiving the sound quality control signal input by the user, the sound quality control function is executed, see Figure 5 , is a schematic diagram of the control flow of the work performed by the controller in the first embodiment of the present invention, wherein the controller performs the following steps:

[0075] Step S501, collecting environmental sound signals;

[0076] Step S502 , calculating the current background sound pressure, that is, calculating the sound pressure intensity of the collected ambient sound signal as the current background sound pressure ψ.

[0077] The current background sound pressure can measure the noise intensity in the current environment and determine whether sound quality control is needed.

[0078] Step S503, determining whether the current background sound pressure ψ is within the range of (ψ1, ψ2]. That is, determining whether the current background sound pressure is greater than a preset first threshold ψ1 and not greater than a preset second threshold ψ2.

[0079] If yes, step S504 is executed. That is, only when the background sound pressure exceeds the intensity of the first threshold and does not exceed a certain sound threshold, the corresponding masking sound output is required.

[0080] Step S504, detecting the current operating state of the refrigerator, the operating state of the refrigerator includes the current operating components of the refrigerator in the current state. By detecting the current operating components, the components currently generating noise can be determined. The noise generated when different components are working has certain characteristics, so the current noise situation can be determined accordingly.

[0081] Step S505 , matching masking sounds, that is, matching corresponding masking sounds in a preset masking sound library according to the current running state, wherein the masking sound library includes masking sounds corresponding to different running states.

[0082] The masking sound library can collect the operating noise of the refrigerator in different operating states in advance, and output corresponding masking sounds. Through several experiments, masking values ​​are calculated to determine the sound with the highest masking value for the operating noise in different operating states as the masking sound corresponding to the operating state.

[0083] Step S506, controlling the speaker to output the masking sound, that is, correspondingly outputting the masking sound, the intensity of the output masking sound is a preset value, or an intensity value that matches the current background sound pressure.

[0084] In this embodiment, the second threshold is greater than the first threshold.

[0085] It should be noted that in the prior art, the scheme of outputting masking sound according to the noise collected in real time eliminates the entire environmental noise, and the environmental noise may change all the time due to the influence of the user or the surrounding environment. Therefore, the scheme of real-time analysis of masking sound needs to perform environmental noise analysis all the time, and the masking sound may change all the time due to other factors, so it is impossible to accurately mask the operating noise of the refrigerator.

[0086] By judging the background sound pressure, the corresponding masking sound output is matched when the background sound pressure is within a certain range. When the background sound pressure is too low or too high, there is no need to output the corresponding masking sound. By matching the masking sound with the current operating state, the masking sound can be output according to the operating state of the refrigerator. There is no need to analyze the noise in real time. The masking sound can be output in real time, which can accurately mask the operating noise of the refrigerator and eliminate the influence of other environments on the masking sound output.

[0087] In another embodiment provided by the present invention, the masking sound library includes corresponding masking sounds generated according to the noise generated when different operating parts of the refrigerator are in operation, and / or corresponding masking sounds generated according to the noise generated when the refrigerator is in different operating modes.

[0088] In the specific implementation of this embodiment, the masking sound library performs masking sound matching in two specific ways: by identifying the current operating state, determining the operating mode of the refrigerator, and matching the masking sound according to the operating mode.

[0089] As another masking sound matching method, a masking sound is matched to each main noise component through different operating components in the current operating state, so that different masking sounds are output when different operating components are running.

[0090] Therefore, the masking sound library includes corresponding masking sounds generated according to noises generated when different operating parts of the refrigerator are in operation, and / or corresponding masking sounds generated according to noises generated when the refrigerator is in different operating modes.

[0091] When the masking sound library is specifically constructed, the operating noise of different operating components is collected, and the corresponding masking sounds are output. The masking values ​​are calculated through several experiments, and the sound with the highest masking value for the operating noise when the operating component is running in several experiments is determined as the masking sound corresponding to the operating component.

[0092] For masking sounds of different operating modes and corresponding output masking sounds, masking values ​​are calculated through several experiments to determine the sound with the highest masking value for the operating noise in the operating mode as the masking sound corresponding to the operating mode.

[0093] By designing a masking sound library, it is possible to match masking sounds to different operating modes and different operating parts of the refrigerator respectively. It is also possible to comprehensively consider the operating status of the refrigerator, subdivide the masking sounds, and improve the masking effect.

[0094] In another embodiment provided by the present invention, the controller is further used for:

[0095] When the current background sound pressure is not greater than the first threshold, controlling the refrigerator to enter a preset stable operation mode;

[0096] When the current background sound pressure is greater than the second threshold, the current operating state of the refrigerator is maintained.

[0097] In the specific implementation of this embodiment, after the user starts the sound quality control function, that is, after receiving the sound quality control signal input by the user, the sound quality control function is executed, see Figure 6 , is a schematic diagram of a control flow of the work performed by the controller in the third embodiment provided by the present invention, wherein the controller performs the following steps:

[0098] Step S601, collecting environmental sound signals;

[0099] Step S602 , calculating the current background sound pressure, that is, calculating the sound pressure intensity of the collected ambient sound signal as the current background sound pressure ψ.

[0100] The current background sound pressure can measure the noise intensity in the current environment and determine whether sound quality control is needed.

[0101] Step S603, determining whether the current background sound pressure ψ is greater than a first threshold ψ1.

[0102] If not, execute step S604;

[0103] If yes, execute step S605;

[0104] Step S604, the refrigerator is controlled to enter a preset stable operation mode. That is, when the current background sound pressure is not greater than the first threshold, the background environment is quiet enough, and it is considered that the user is resting, and the sound pressure level needs to be low enough. At this time, the speaker does not work, and the refrigerator is controlled to enter a preset stable operation mode. In the stable operation mode, the vacuum pump and other operating parts that generate relatively large noise are turned off, and the refrigerator performs stable refrigeration with very little noise. The refrigerator is maintained to operate stably under the premise of reducing interference to the user.

[0105] Step S605 , determining whether the current background sound pressure ψ is greater than a second threshold ψ2 .

[0106] If yes, execute step S606;

[0107] If not, execute step S607;

[0108] Step S606, maintain the current operating state of the refrigerator. When the current background sound pressure ψ is greater than the second threshold ψ2, the background noise in the user's home is large enough, and no additional masking sound is required, and the speaker does not work. At this time, the refrigerator is kept running normally, that is, the refrigerator maintains the current operating state without additional control.

[0109] Step S607, detecting the current operating state of the refrigerator, corresponding to executing step S504 in the above embodiment. When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting the current operating state of the refrigerator, the current operating state includes the current operating components of the refrigerator; matching the corresponding masking sound in the preset masking sound library according to the current operating state, and controlling the speaker to output the masking sound.

[0110] Different control strategies are implemented when the current background sound pressure is too high or too low to avoid interfering with the user's normal life. This can also maintain the normal operation of the refrigerator and avoid affecting the normal refrigeration work.

[0111] In another embodiment provided by the present invention, the controller is further used for:

[0112] When the current operating state meets the preset operating conditions of the stable operating mode, the ambient sound signal is calculated according to a preset sound quality evaluation model to obtain a current sound quality score;

[0113] When the current sound quality score is not greater than a preset third threshold, a first masking sound corresponding to the stable operation mode is matched in the masking sound library, and the speaker is controlled to output the first masking sound.

[0114] In the specific implementation of this embodiment, after detecting the current operating state of the refrigerator in step S504 in the above embodiment, the controller is further used to perform the following steps, see Figure 7 , is a schematic diagram of the control flow of the work performed by the controller provided by the present invention in the fourth embodiment:

[0115] Step S701, detecting the current operating state of the refrigerator;

[0116] Step S702, judging whether the current running state meets the running conditions of the stable running mode. That is, judging whether the current running components in the current running state meet the running component requirements in the running conditions of the stable running mode;

[0117] If yes, execute step S703;

[0118] Step S703, calculating the current sound quality score, that is, calculating the ambient sound signal according to a preset sound quality evaluation model to obtain the current sound quality score.

[0119] The sound quality evaluation model is obtained by fitting the sound pressure level, loudness, roughness and corresponding subjective sound quality score of the operating noise signal of the refrigerator tested in a stable operating mode.

[0120] The sound quality of the refrigerator is evaluated through the sound characteristics when the refrigerator is running, thereby providing a reference for the silent control of the refrigerator. In addition, the controller also determines an evaluation benchmark based on the current operating condition of the refrigerator and the ambient noise signal of the environment in which it is located, and controls the working state of the noise source component corresponding to the operating condition based on the sound quality score and the evaluation benchmark. Therefore, the evaluation benchmark under different operating conditions can be dynamically adjusted according to the ambient noise signal of the environment in which the refrigerator is located, so as to perform silent control on the working state of the noise source component of the operating condition in combination with the sound quality score of the current operating condition, thereby improving the sound quality of the refrigerator, reducing the impact of the refrigerator noise on the user, and improving the user experience.

[0121] Step S704: determine whether the current sound quality score is greater than a third threshold.

[0122] If not, execute step S705;

[0123] If yes, execute step S707;

[0124] Step S705, matching a first masking sound corresponding to the stable operation mode, that is, matching the first masking sound corresponding to the stable operation mode in the masking sound library;

[0125] Step S706: Control the speaker to output the first masking sound, that is, the first masking sound is outputted correspondingly, and the intensity of the outputted first masking sound is a preset value, or an intensity value that matches the current background sound pressure.

[0126] Step S707, maintaining the current operating state of the refrigerator.

[0127] When the refrigerator is in a stable operation mode, a sound quality score of the refrigerator operation is calculated. If it is determined that the sound quality score is less than or equal to a third threshold value and the sound quality does not meet the requirements at this time, the sound quality of the refrigerator is improved by outputting a first masking sound. If it is determined that the sound quality score is greater than the third threshold value and the sound quality meets the requirements at this time, there is no need to perform sound quality control and the current operation mode is maintained. The impact of the refrigerator noise in the stable operation mode on the user is reduced, and the user experience is improved.

[0128] In another embodiment provided by the present invention, the controller is further used for:

[0129] When the current operating state meets the operating condition preset in the stop mode or the operating condition preset in the standby mode, the speaker is controlled to stop outputting the masking sound.

[0130] When this embodiment is implemented, see Figure 8 , is a schematic diagram of a control flow of the work performed by the controller provided by the present invention in the fifth embodiment, wherein the controller further performs the following steps;

[0131] Step S801, detect the current operating state of the refrigerator, the operating state of the refrigerator includes the current operating parts of the refrigerator in the current state. By detecting the current operating parts, the parts currently generating noise can be determined. The noise generated when different parts are working has certain characteristics, so the current noise situation can be determined accordingly.

[0132] Step S802, matching masking sounds, that is, matching corresponding masking sounds in a preset masking sound library according to the current running state, wherein the masking sound library includes masking sounds corresponding to different running states.

[0133] The masking sound library can collect the operating noise of the refrigerator in different operating states in advance, and output corresponding masking sounds. Through several experiments, masking values ​​are calculated to determine the sound with the highest masking value for the operating noise in different operating states as the masking sound corresponding to the operating state.

[0134] Step S803, controlling the speaker to output the masking sound, that is, correspondingly outputting the masking sound, the intensity of the output masking sound is a preset value, or an intensity value that matches the current background sound pressure.

[0135] Step S804, re-detecting the current operating status of the refrigerator.

[0136] Step S805, determining whether the current operating state meets the operating conditions of the shutdown mode.

[0137] If yes, execute step S806;

[0138] If not, execute step S807;

[0139] Step S806, controlling the speaker to stop outputting the masking sound; that is, when the current operating state meets the preset operating conditions of the shutdown mode, stop outputting the masking sound.

[0140] Step S807, determining whether the current operating state meets the preset operating conditions of the standby mode.

[0141] If yes, execute step S806; that is, when the current operating state meets the preset operating conditions of the standby mode, control the speaker to stop outputting the masking sound.

[0142] If not, return to step S804.

[0143] After the controller controls the speaker to output the masking sound, the operating status of the refrigerator is continuously detected. When the refrigerator is in the shutdown state or the standby state, the masking sound output is stopped to avoid the masking sound continuously output in the shutdown or standby state affecting the user experience.

[0144] In another embodiment provided by the present invention, the controller is further used for:

[0145] When the current operating state meets the preset operating conditions of the quick-freezing operating mode, a second masking sound corresponding to the quick-freezing operating mode is matched in the masking sound library, and the speaker is controlled to output the second masking sound.

[0146] In the specific implementation of this embodiment, after detecting the current operating state of the refrigerator in step S504 in the above embodiment, the controller is further used to perform the following steps, see Fig. 9 , is a schematic diagram of the control flow of the work performed by the controller provided by the present invention in the sixth embodiment:

[0147] Step S901, detecting the current operating state of the refrigerator;

[0148] Step S902, judging whether the current running state meets the running conditions preset in the quick freezing running mode. That is, judging whether the current running components in the current running state meet the running component requirements in the running conditions of the stable quick freezing mode;

[0149] If yes, execute step S903;

[0150] If not, return to step S901;

[0151] When it is detected that the operating state of the refrigerator is quick-freezing mode, the speed of the compressor and refrigeration fan will increase significantly, and the noise of the refrigerator as a whole will be more prominent. Therefore, under different background noise conditions, the sound pressure level, loudness and sharpness of the noise signal will be higher than that in the stable operation mode. At this time, there is no need to calculate the sound quality, and the corresponding masking sound output can be directly matched.

[0152] Step S903, matching the second masking sound corresponding to the quick freezing operation mode, that is, matching the second masking sound corresponding to the quick freezing operation mode in the masking sound library;

[0153] Step S904: Control the speaker to output the second masking sound, that is, the second masking sound is outputted correspondingly, and the intensity of the outputted second masking sound is a preset value, or an intensity value that matches the current background sound pressure.

[0154] When the refrigerator is in the quick-freezing operation mode, there is no need to calculate the sound quality score of the refrigerator operation. At this time, the sound quality does not meet the requirements. The sound quality of the refrigerator is improved by outputting a second masking sound, reducing the impact of the refrigerator noise in the quick-freezing operation mode on the user and improving the user experience.

[0155] In another embodiment provided by the present invention, the refrigerator further comprises:

[0156] A vacuum device, used for vacuuming the storage room or storage box in the refrigerator;

[0157] The controller is also used for:

[0158] When the currently operating component in the current operating state includes the damper, a corresponding third masking sound is matched in a preset masking sound library, and the speaker is controlled to output the third masking sound.

[0159] When this embodiment is implemented, see Fig.10 , is a structural schematic diagram of the working state of a refrigerator provided by another embodiment of the present invention; the refrigerator also includes a vacuum pumping device 303 and a storage chamber 102.

[0160] The vacuum device 303 is used to vacuum the storage room or storage box in the refrigerator to achieve a better preservation effect.

[0161] The vacuum pump includes a vacuum pump, which is used to extract air from the storage room / storage box to make the storage room / storage box reach a near negative pressure. The vacuum pressure switch limits the vacuum pump's vacuum pressure value; when the vacuum pressure in the storage box reaches the set negative pressure value, the vacuum pump's vacuum pipe leaves the storage room / storage box.

[0162] When the vacuum pump is working, it will generate a lot of noise. Therefore, when performing sound quality control, it is necessary to perform sound quality control on the vacuum pump separately.

[0163] Therefore, it is necessary to monitor the vacuum device when obtaining the current operating status;

[0164] When the currently operating component in the current operating state includes the vacuum device, that is, the vacuum device is in operation, a corresponding third masking sound is matched in a preset masking sound library, and the speaker is controlled to output the third masking sound.

[0165] By separately shielding the vacuum device of the refrigerator, the impact of the working noise of the vacuum device can be reduced and the user experience can be improved.

[0166] In another embodiment provided by the present invention, the refrigerator further comprises:

[0167] A damper, used to adjust the cooling capacity of the cold air in the refrigerator compartment;

[0168] The controller is also used for:

[0169] When the currently operating component in the current operating state includes the damper, a corresponding fourth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fourth masking sound.

[0170] When this embodiment is implemented, see Fig.10 , the refrigerator also includes a damper 304 .

[0171] The damper is used to adjust the cold air volume of the refrigerator compartment; when the temperature inside the refrigerator is too high, the controller starts the motor, and the motor transmits power to the damper plate through the gear transmission rod to open it, so that cold air flows into the refrigerator and lowers the temperature. When the temperature inside the refrigerator reaches the set value, the controller stops issuing commands, the motor stops working, and the damper plate closes, so as to keep the temperature inside the refrigerator stable.

[0172] When the damper is working, it will generate a lot of noise. Therefore, when performing sound quality control, it is necessary to perform sound quality control on the damper separately.

[0173] Therefore, when obtaining the current operating status, the damper needs to be monitored;

[0174] When the currently operating component in the current operating state includes the damper, that is, the damper is in operation, a corresponding fourth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fourth masking sound.

[0175] By individually shielding the damper of the refrigerator, the impact of the damper's operating noise can be reduced and the user experience can be improved.

[0176] In another embodiment provided by the present invention, the refrigerator further comprises:

[0177] An electric switching valve, used to control the flow direction of the refrigerant in the refrigerator refrigeration system;

[0178] The controller is also used for:

[0179] When the currently operating component in the current operating state includes the electric switching valve, a corresponding fifth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fifth masking sound.

[0180] When this embodiment is implemented, see Fig.10 The refrigerator also includes an electric switching valve 305.

[0181] The electric switching valve is an important component used to control the flow direction of refrigerant in the refrigerator refrigeration system. The motor drives the valve to open and close, thereby changing the flow direction of refrigerant in the refrigeration system to achieve functions such as refrigeration and defrosting.

[0182] In the refrigerator refrigeration system, the refrigerant is compressed by the compressor and enters the condenser. After the condenser dissipates heat, it becomes liquid and then enters the evaporator through the expansion valve to complete the refrigeration cycle. When the refrigerator needs to be defrosted, the electric switching valve will guide the refrigerant to the condenser, thereby increasing the temperature inside the condenser and melting the frost in the refrigerator.

[0183] When the electric switching valve is working, it will generate a lot of noise. Therefore, when performing sound quality control, it is necessary to perform sound quality control on the electric switching valve separately.

[0184] Therefore, when obtaining the current operating status, the electric switching valve needs to be monitored;

[0185] When the currently operating component in the current operating state includes the electric switching valve, that is, the electric switching valve is in operation, a corresponding fifth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fifth masking sound.

[0186] By individually shielding the electric switching valve of the refrigerator, the impact of the damper's operating noise can be reduced and the user experience can be improved.

[0187] Another embodiment of the present invention provides a refrigerator sound quality control method, the refrigerator comprising:

[0188] Sound sensor, used to collect environmental sound signals;

[0189] A speaker, for outputting sound signals;

[0190] Controller;

[0191] The method comprises:

[0192] In response to a sound quality control signal input by a user, a current background sound pressure is calculated according to the collected ambient sound signal;

[0193] When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator;

[0194] A corresponding masking sound is matched in a preset masking sound library according to the current running state, and the speaker is controlled to output the masking sound.

[0195] It should be noted that the refrigerator sound quality control method provided in the embodiment of the present invention is the same as all the process steps executed by the controller of the refrigerator in the above embodiment, see Figure 4 The working principles and beneficial effects of the two correspond one to one. For the specific workflow diagram, see Figures 5 to 10 , so I will not go into details.

[0196] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0197] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: Sound sensor, used to collect environmental sound signals; A speaker, for outputting sound signals; Controller for: In response to a sound quality control signal input by a user, a current background sound pressure is calculated according to the collected ambient sound signal; When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator; A corresponding masking sound is matched in a preset masking sound library according to the current running state, and the speaker is controlled to output the masking sound.

2. The refrigerator according to claim 1, characterized in that: The masking sound library includes corresponding masking sounds generated according to noises generated when different operating parts of the refrigerator are in operation, and / or corresponding masking sounds generated according to noises generated when the refrigerator is in different operating modes.

3. The refrigerator according to claim 1, characterized in that: The controller is also used for: When the current background sound pressure is not greater than the first threshold, controlling the refrigerator to enter a preset stable operation mode; When the current background sound pressure is greater than the second threshold, the current operating state of the refrigerator is maintained.

4. The refrigerator according to claim 1, characterized in that: The controller is also used for: When the current operating state meets the preset operating conditions of the stable operating mode, the ambient sound signal is calculated according to a preset sound quality evaluation model to obtain a current sound quality score; When the current sound quality score is not greater than a preset third threshold, a first masking sound corresponding to the stable operation mode is matched in the masking sound library, and the speaker is controlled to output the first masking sound.

5. The refrigerator according to claim 1, characterized in that: The controller is also used for: When the current operating state meets the operating condition preset in the stop mode or the operating condition preset in the standby mode, the speaker is controlled to stop outputting the masking sound.

6. The refrigerator according to claim 1, characterized in that: The controller is also used for: When the current operating state meets the preset operating conditions of the quick-freezing operating mode, a second masking sound corresponding to the quick-freezing operating mode is matched in the masking sound library, and the speaker is controlled to output the second masking sound.

7. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: A vacuum device, used for vacuuming the storage room or storage box in the refrigerator; The controller is also used for: When the currently operating component in the current operating state includes the vacuum device, a corresponding third masking sound is matched in a preset masking sound library, and the speaker is controlled to output the third masking sound.

8. The refrigerator according to claim 1, characterized in that The refrigerator further comprises: A damper, used to adjust the cooling capacity of the cold air in the refrigerator compartment; The controller is also used for: When the currently operating component in the current operating state includes the damper, a corresponding fourth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fourth masking sound.

9. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: An electric switching valve, used to control the flow direction of the refrigerant in the refrigerator refrigeration system; The controller is also used for: When the currently operating component in the current operating state includes the electric switching valve, a corresponding fifth masking sound is matched in a preset masking sound library, and the speaker is controlled to output the fifth masking sound.

10. A refrigerator sound quality control method, characterized in that: The refrigerator comprises: Sound sensor, used to collect environmental sound signals; A speaker, for outputting sound signals; Controller; The method comprises: In response to a sound quality control signal input by a user, a current background sound pressure is calculated according to the collected ambient sound signal; When the current background sound pressure is greater than a preset first threshold value and not greater than a preset second threshold value, detecting a current operating state of the refrigerator, wherein the current operating state includes current operating components of the refrigerator; A corresponding masking sound is matched in a preset masking sound library according to the current running state, and the speaker is controlled to output the masking sound.

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