Noise reduction control method, refrigerator, and computer storage medium

Abstract

The application discloses a noise reduction control method, a refrigerator and a computer storage medium, and comprises the following steps: obtaining an average vibration amplitude A1 of a first preset time length after a compressor of the refrigerator is started; when the refrigerator is opened, recording an average vibration amplitude A2 of the compressor in an opening state within a second preset time length; determining whether the A2 is greater than the A1, if yes, adjusting the rotating speed of the compressor to reduce noise, and if not, controlling the compressor to keep the current rotating speed. According to the resonance mechanism of the compressor and the cabinet when the refrigerator is opened and just closed, the amplitude change of the exhaust pipe of the compressor is detected to fine-tune the operating frequency of the compressor, the resonance effect of the fixed frequency of the compressor and the cabinet is broken, and thus the generation of noise is reduced. The low-frequency humming sound generated after the refrigerator is opened and just closed is avoided, the discomfort of the low-frequency humming sound to users in the industry is solved, and the product competitiveness is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerator noise reduction, in particular to a noise reduction control method, a refrigerator and a computer storage medium. BACKGROUND

[0002] The refrigerator is a common household food preservation appliance. The variable frequency air-cooled refrigerator dissipates heat inside the refrigerator to the air through the condenser by a variable frequency compressor and a cross-flow fan. During the working process of the refrigerator, especially when the user opens or closes the refrigerator door, if the operating frequency of the compressor is the same as or close to the inherent frequency of the cabinet at this time, resonance will occur, producing a large noise. This noise is a low-frequency humming sound, which will cause the user to feel extremely uncomfortable. SUMMARY

[0003] The present application relates to the technical field of refrigerator noise reduction, in particular to a noise reduction control method, a refrigerator and a computer storage medium.

[0004] The technical scheme adopted by the present application is:

[0005] The present application provides a noise reduction control method, comprising the steps of:

[0006] Obtaining the average vibration amplitude A1 of the first preset time length after the refrigerator compressor is turned on;

[0007] When the refrigerator door is opened, recording the average vibration amplitude A2 of the compressor in the second preset time length; determining whether A2 is greater than A1, if yes, adjusting the speed of the compressor to reduce noise, if not, controlling the compressor to maintain the current speed.

[0008] When the refrigerator door is closed, recording the average vibration amplitude B1 of the compressor in the third preset time length; determining whether B1 is greater than A1, if yes, adjusting the speed of the compressor to reduce noise, if not, controlling the compressor to maintain the current speed.

[0009] Further, adjusting the speed of the compressor to reduce noise specifically includes the steps of: reducing the speed of the compressor by a preset value, and determining whether the speed of the compressor is greater than or equal to the initial speed of the lower level of the current speed gear of the compressor, if yes, returning to the step of determining whether the refrigerator door is opened, if not, adjusting the speed of the compressor to the initial speed of the current speed gear, and increasing the speed of the compressor by a preset value to reduce noise.

[0010] After increasing the speed of the compressor by a preset value to reduce noise, further comprising the steps of:

[0011] Determining whether the speed of the compressor is less than or equal to the initial speed of the higher level of the current speed gear of the compressor;

[0012] If yes, it is judged whether the refrigerator is opened or not;

[0013] If the refrigerator is opened, the average vibration amplitude A3 of the compressor in the fourth preset time period is recorded, and it is judged whether A3 is greater than A1 or not. If yes, the step of increasing the speed of the compressor by a preset value is returned to, and if no, the speed of the compressor is kept.

[0014] If the refrigerator is closed, the average vibration amplitude B2 of the compressor in the fifth preset time period is recorded, and it is judged whether B2 is greater than A1 or not. If yes, the step of increasing the speed of the compressor by a preset value is returned to, and if no, the speed of the compressor is kept.

[0015] If no, the speed of the compressor is set when the vibration amplitude A2, A3, B1 and B2 is closest to the average vibration amplitude A1 during the adjustment of the compressor, and the speed of the compressor is taken as the running speed of the compressor.

[0016] Specifically, a preset mute mode is selected by the user, and the step of obtaining the average vibration amplitude A1 of the compressor of the refrigerator in a preset time period is started to be executed.

[0017] The step of detecting the average vibration amplitude A1 of the compressor of the refrigerator in a preset time period is started to be executed when the user selects the mute mode and the power-on time of the refrigerator is greater than a preset power-on time.

[0018] Preferably, the sensor for detecting the vibration amplitude of the refrigerator is arranged on the door body, the compressor return air pipe or the compressor exhaust pipe.

[0019] The application further provides a refrigerator, which uses the above-mentioned noise reduction control method to reduce noise.

[0020] The application further provides a computer storage medium for storing a computer program, which executes the above-mentioned noise reduction control method when running.

[0021] Compared with the prior art, the application adjusts the running frequency of the compressor by detecting the amplitude change of the compressor exhaust pipe, breaks the resonance effect of the fixed frequency of the compressor and the cabinet, and thus reduces the generation of noise. The low-frequency humming sound generated after the refrigerator is opened and closed is avoided, the discomfort of the low-frequency humming sound to the user is solved, and the product competitiveness is increased. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0023] Figure 1 is a flow chart of an embodiment of the present application;

[0024] Figure 2 is a flow chart of an embodiment of the present application;

[0025] Figure 3 is a front view of an embodiment of the present application;

[0026] Figure 4 is a side view of an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0028] The principles and structures of the present application will be described in detail below with reference to the drawings and embodiments.

[0029] When the refrigerator is working, especially when the user opens or closes the refrigerator door, if the operating frequency of the compressor at this time is the same as or close to the inherent frequency of the cabinet, resonance will occur, resulting in excessive vibration amplitude and thus generating a large noise. This noise is a low-frequency humming sound, which will give the user an extremely uncomfortable feeling. To this end, the present application proposes a noise control method, which detects the vibration amplitude of the compressor exhaust pipe of the refrigerator at each time state when the refrigerator door is opened or closed, to adjust the speed of the compressor, break the resonance effect of the compressor and the cabinet fixed frequency, and thus reduce the generation of noise.

[0030] As shown in Figure 1 , 2 , the present application proposes a noise control method, comprising the steps of:

[0031] obtaining the average vibration amplitude A1 of the first preset time length after the refrigerator compressor is turned on; that is, detecting the average vibration amplitude A1 of the refrigerator in the preset time length after the refrigerator is turned on;

[0032] When the refrigerator door is opened, record the average vibration amplitude A2 of the compressor in the second preset time length; determine whether the average vibration amplitude A2 of the compressor in the second preset time length is greater than the average vibration amplitude A1 in the set time period; if yes, it means that the compressor of the refrigerator and the cabinet have resonance, resulting in excessive vibration, and the speed of the compressor is adjusted to reduce noise; if not, the current speed of the compressor is directly output, that is, the compressor is controlled to keep the current speed running.

[0033] When the refrigerator is closed, the average vibration amplitude B1 of the compressor in the second preset time period is recorded, and it is determined whether the average vibration amplitude B1 of the compressor in the second preset time period is greater than the average vibration amplitude A1 in the preset time period. If yes, it indicates that the resonance between the compressor and the cabinet still occurs after the refrigerator is closed, resulting in the increase of the average amplitude. The resonance is broken by adjusting the speed of the compressor to reduce the noise. If no, the current speed of the compressor is directly output, that is, the compressor is controlled to keep the current speed.

[0034] The resonance is caused by the close inherent frequency of the compressor and the cabinet. Increasing or decreasing the speed of the compressor is to avoid the inherent frequency of the cabinet. After the refrigerator is opened or closed, the state of the cabinet and the load in the cabinet change. The compressor is prone to resonance with the cabinet, resulting in abnormal increase of noise. After detection by the vibration sensor, the speed of the compressor is adjusted according to the specific vibration amplitude change to avoid resonance.

[0035] In addition, it should be noted that the terms "first", "second", etc. are used to limit the time period, which is only for the convenience of distinguishing the corresponding time period. If no further declaration is made, the above terms have no special meaning, and therefore cannot be understood as a limitation on the protection scope of the present application.

[0036] Specifically, the speed of the compressor is adjusted to reduce the noise, which specifically includes the following steps:

[0037] First, the current gear x and the current speed s of the compressor are determined 当 , the initial speed s of the current gear 初 , and the initial speed s(x-1) of the gear (x-1) lower than the current gear (x-1), the current speed of the compressor is reduced by n, that is, s 当 -n, n is a preset value, and n can be set to 60 revolutions.

[0038] Then, it is determined whether the current speed s of the reduced compressor 当 is greater than the preset initial speed of the lower gear, that is, s(x-1);

[0039] If yes, it indicates that the amount of reduced speed is still within a normal range, and the refrigerator refrigeration will not be significantly affected. The step of determining whether the refrigerator is opened is returned to perform cyclic determination.

[0040] If no, it indicates that the speed is reduced too much. The speed of the compressor is modified to the preset initial speed sx of the current gear x, and the speed of the compressor is increased to reduce the noise.

[0041] After the refrigerator door is opened and closed, the state of the cabinet and the load inside change. The compressor is prone to resonance with the cabinet, resulting in abnormally increased noise. After the vibration sensor detects this, it transmits the specific value, i.e., the vibration amplitude, to the main control program (the refrigerator's controller). The main control program then records and processes this data, and sends instructions to the compressor to adjust its speed. The main control program automatically adjusts the compressor to the optimal speed for subsequent speed control. The main control program initializes after each power outage, so there will be a slight difference in speed control between the first start of the compressor or after initialization and subsequent speed control.

[0042] Increasing the compressor speed to reduce noise includes the following steps:

[0043] Determine the initial compressor speed s(x+1) one level higher than the current speed x; increase the compressor speed by n based on the preset initial speed s of the current speed x, i.e., s 当 =s 初 +n.

[0044] In addition to increasing the compressor speed to reduce noise, the process also includes the following steps:

[0045] Determine the current speed s of the compressor 当 Is it greater than or equal to the initial speed s(x+1) of the compressor at the next higher speed setting?

[0046] If so, check if the refrigerator door is open;

[0047] If the refrigerator door is opened, record the average vibration amplitude A3 of the compressor in the open state within the fourth preset time period when the refrigerator door is opened;

[0048] Determine whether the average vibration amplitude A3 of the compressor in the fourth preset time period when the refrigerator door is opened is greater than the average vibration amplitude A1 of the compressor in the first preset time period. If so, it means that there is still resonance causing the amplitude to be too large. Return to the step of increasing the compressor speed to reduce noise and increase the compressor speed again to break the resonance. If not, control the compressor to maintain the current speed.

[0049] If the refrigerator door is closed, record the average vibration amplitude B2 of the compressor in the on state within the fifth preset time period;

[0050] Determine whether the average vibration amplitude B2 of the compressor in the fifth preset time period is greater than the average vibration amplitude A1 of the compressor in the first preset time period. If so, it means that there is still resonance causing excessive amplitude, and it is necessary to return to the step of increasing the speed of the compressor to reduce noise and increase the speed of the compressor again to break the resonance. If not, control the compressor to maintain the current speed.

[0051] If not, it is explained that adjusting the compressor speed (up or down) has no way to reduce the vibration to the initial vibration amplitude A1, and the compressor speed corresponding to the average vibration amplitude A2, A3, B1, B2 in each adjustment process is obtained, and the compressor speed is set as the running speed of the compressor, and the vibration amplitude is reduced as much as possible to achieve the effect of reducing noise.

[0052] The speed of the compressor is generally divided into 9-10 gears at 1000-4500 rpm, which is fixed at a certain speed, for example: the preset 3 gears are 2220 rpm, and the 4 gears are 2580 rpm, so the adjustable range of the speed of the 3 gears is between 2220-2580 rpm; n can be 60, which is the difference value of the speed adjustment, and the gradient of the speed adjustment is 1 Hz=60 rpm each time; when resonance occurs, the speed of the compressor is continuously fine-tuned to avoid the resonance frequency and reduce resonance.

[0053] In a specific embodiment, the control program described above can be preset as a selectable silent mode, and the user selects the silent mode before executing the above noise reduction control, that is, the step of detecting the average vibration amplitude A1 of the refrigerator within the first preset time length after the refrigerator is powered on and the compressor is started.

[0054] Specifically, since the average vibration amplitude A1 represents the amplitude of the normal operation (less noise or no noise) of the refrigerator, a long period of time needs to be recorded to be representative, and when the user selects the silent mode and the power-on time length of the refrigerator is greater than the preset power-on time length, the step of obtaining the average vibration amplitude A1 of the refrigerator within the first preset time length after the compressor is started is executed.

[0055] The preset power-on time length can be 24 hours, and when the power-on time of the refrigerator is less than 24 hours, the user selects to start the silent mode, and the average vibration amplitude A1 of the refrigerator within the first preset time length after the compressor is started is obtained only when the power-on time reaches 24 hours, to ensure that the data is accurate and representative.

[0056] In a preferred embodiment, the sensor for detecting the vibration amplitude of the refrigerator is arranged on the exhaust pipe of the compressor, in addition to which, the sensor can also be arranged on the return air pipe of the compressor, or directly on the door body, all of which are within the protection scope of the present application, wherein the vibration amplitude when arranged on the exhaust pipe is the most accurate and best matches the actual noise situation.

[0057] The present application solves the discomfort of low-frequency humming sound to users in the industry and increases product competitiveness by analyzing the resonance mechanism of the compressor and the cabinet when the door is opened and just closed, and solving the low-frequency humming sound of the refrigerator during the opening and closing of the door through corresponding logic control.

[0058] In specific embodiments, the first preset time length can be set to a time length less than 24 hours, and the preset power-on time length can be set to 24 hours.

[0059] The second preset time length can be set to 1s to 3s, and can be preferably 2s. Because the user's door opening time will not be too long, a shorter time of vibration amplitude needs to be intercepted to ensure the accuracy of the value.

[0060] The third preset time length can be set to 8s to 12s, and can be preferably 10s. In the case of closing the door, because closing the door will also cause a certain vibration, the time to be intercepted needs to be longer than that in the opening state, to ensure the effectiveness of the average amplitude value obtained.

[0061] The fourth preset time length can be set to 1s to 3s, and can be preferably 2s. Because the user's door opening time will not be too long, a shorter time of vibration amplitude needs to be intercepted to ensure the accuracy of the value.

[0062] The fifth preset time length can be set to 8s to 12s, and can be preferably 10s. In the case of closing the door, because closing the door will also cause a certain vibration, the time to be intercepted needs to be longer than that in the opening state, to ensure the effectiveness of the average amplitude value obtained.

[0063] As shown in the following is a specific embodiment of the above noise reduction method: Figure 2

[0064] After the refrigerator is powered on, the user selects the silent mode, the refrigerator system is stable, and the temperature in the box (i.e. the temperature in the chamber) reaches the preset temperature, and the main control program accumulates the average vibration amplitude A1 of the exhaust pipe in the previous t1 time (i.e. the first preset time length). The user can select the function before power-on for 24H, but it is not running, to optimize the minimum A1;

[0065] The average vibration amplitude A2 of the exhaust pipe when the compressor is running is recorded every 2S in the opening state, and the average vibration amplitude difference is defined as C1=A2-A1;

[0066] The average vibration amplitude B1 of the exhaust pipe when the compressor is running is recorded every 10S in the closing state, and the average vibration amplitude difference is defined as C2=B1-A1;

[0067] After initialization, the compressor speed becomes the initialization speed of the current gear again;

[0068] The average vibration amplitude A3 of the exhaust pipe when the compressor is running is recorded every 2S in the opening state, and the average vibration amplitude difference is defined as C3=A3-A1;

[0069] ​After initialization, the vibration amplitude B2 of the exhaust pipe when the compressor is running is recorded every 10s in the closed door state, and the average vibration amplitude difference is defined as C4=B2-A1.

[0070] The specific control process is as follows:

[0071] After the mute mode is turned on, the main control program accumulates the average vibration amplitude A1 of the exhaust pipe in the previous t1 time (i.e. the first preset time length), judges in real time whether the refrigerator door is open, and if yes, records A2 and calculates C1; if not, records B1 and calculates C2.

[0072] Whether A2>A1 or B1>A1 is true (determined according to the open door state), if true, the compressor speed x is determined, and the current set speed of the compressor is reduced by 60, and the next step is entered; if not, the current set speed of the compressor is output.

[0073] s 当 Whether s(x-1) is true, i.e. whether the current speed of the compressor is greater than or equal to the initial speed of the lower level speed of the current speed of the compressor, if true, the recording of A2 or B1 and the speed judgment are continued; if not, the speed is adjusted to the initial speed of the speed.

[0074] After initialization, A3 or B2 is recorded, and C3 or C4 is calculated.

[0075] Whether A3>A1 or B2>A1 is true (determined according to the open door state), if true, the compressor speed x is determined, and the current set speed of the compressor is increased by 60, and the next step is entered; if not, the current set speed of the compressor is output.

[0076] s 当 Whether s(x+1) is true, i.e. whether the current speed of the compressor is less than or equal to the initial speed of the higher level speed of the current speed of the compressor, if true, the recording of A3 or B2 and the speed judgment are continued; if not, the minimum value of C1 and C3 or C2 and C4 is selected, and the set speed corresponding to the minimum value is obtained as the running speed of the compressor.

[0077] As shown in Figure 3 , 4 , the application further provides a refrigerator, which comprises a compressor 1, an evaporator 2, a condenser 3, a throttle valve, and a box body 4 with a chamber and a compressor mounting cavity, the return pipe of the compressor is connected with the evaporator 2, the exhaust pipe of the compressor is connected with the condenser 3, a sensor 5 for detecting the vibration amplitude of the refrigerator is arranged on the exhaust pipe of the compressor 1, and the above-mentioned noise reduction control method is used to avoid resonance between the compressor and the box body during the operation of the compressor and to generate noise.

[0078] The application further provides a computer storage medium for storing a computer program, wherein the computer program performs the noise reduction control method.

[0079] In one or more exemplary embodiments, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0080] It is to be understood that the above-referenced terminology regarding the usage of words in this disclosure is only intended to describe specific embodiments and is not intended to limit the example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0081] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full authority toequivalents thereof.

[0082] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", and derivatives thereof shall relate to the application as it is oriented in use. Therein, the terminology can include the words "above" or "below" or "up" or "down" or "wall" or "floor" or "ceiling" or "top" or "bottom" or any derivatives of the same. Nothing in the specification should be construed as indicating any preference or requirement for a particular orientation of the application.

[0083] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full authority toequivalents thereof.

Claims

1. A noise reduction control method, characterized by, The method comprises the steps of: acquiring an average vibration amplitude A1 of a refrigerator compressor in a first preset time period after the compressor is started; when the refrigerator door is opened, recording an average vibration amplitude A2 of the compressor in a second preset time period; determining whether A2 is greater than A1, if yes, adjusting the speed of the compressor to reduce noise, if no, keeping the current speed of the compressor; when the refrigerator door is closed, recording an average vibration amplitude B1 of the compressor in a third preset time period; determining whether B1 is greater than A1, if yes, adjusting the speed of the compressor to reduce noise, if no, keeping the current speed of the compressor; adjusting the speed of the compressor to reduce noise specifically comprises the steps of: reducing the speed of the compressor by a preset value, and determining whether the speed of the compressor is greater than or equal to the initial speed of a lower gear of the current speed of the compressor, if yes, returning to the step of determining whether the refrigerator door is opened, if no, adjusting the speed of the compressor to the initial speed of the current speed of the compressor, and then increasing the speed of the compressor by the preset value to reduce noise; after increasing the speed of the compressor by the preset value to reduce noise, further comprising the steps of: determining whether the speed of the compressor is less than or equal to the initial speed of a higher gear of the current speed of the compressor; if yes, determining whether the refrigerator door is opened; if the refrigerator door is opened, recording an average vibration amplitude A3 of the compressor in a fourth preset time period; determining whether A3 is greater than A1, if yes, returning to the step of increasing the speed of the compressor by the preset value to reduce noise, if no, keeping the current speed of the compressor; if the refrigerator door is closed, recording an average vibration amplitude B2 of the compressor in a fifth preset time period; determining whether B2 is greater than A1, if yes, returning to the step of increasing the speed of the compressor by the preset value to reduce noise, if no, keeping the current speed of the compressor.

2. The noise reduction control method of claim 1, wherein, if no, acquiring the speed of the compressor set when the average vibration amplitude A2, A3, B1, B2 in the adjusting process of the compressor is closest to the average vibration amplitude A1, and taking the speed of the compressor as the running speed of the compressor.

3. The noise reduction control method of claim 1, wherein, a preset mute mode, when a user selects the mute mode, the step of acquiring the average vibration amplitude A1 of the refrigerator compressor in the first preset time period after the compressor is started is executed.

4. The noise reduction control method of claim 3, wherein, when the user selects the mute mode and the power-on time of the refrigerator is greater than a preset power-on time, the step of acquiring the average vibration amplitude A1 of the refrigerator compressor in the first preset time period after the compressor is started is executed.

5. The noise reduction control method of claim 1, wherein, the average vibration amplitude is obtained by averaging the values detected by a sensor arranged on the door body, the return gas pipe of the compressor or the exhaust pipe of the compressor.

6. A refrigerator characterized by comprising: the noise reduction control method of any one of claims 1 to 5 is used to reduce noise.

7. A computer storage medium storing a computer program, characterized in that, the computer program executes the noise reduction control method of any one of claims 1 to 5.

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