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 refrigerating system and a controller, and the refrigerating system comprises a compressor, a condenser, an evaporator and a fan; the controller is configured to collect the abnormal sound frequency and sound power of abnormal sounds within preset time when the refrigerator defrosts; according to the abnormal sound frequency, the preset time and the sound power, an abnormal sound value is calculated, and according to the size relation between the abnormal sound value and a preset abnormal sound value range, the power of a heater and the rotating speed of a compressor are adjusted; and after defrosting of the refrigerator is finished, the heater is closed, and the fan is started to run until the compressor is started. The time for the injection molding part to reach the stable state from the frozen state is shortened by increasing the rotating speed of the compressor, the frequency of abnormal sound generated due to thermal expansion and cold contraction is reduced, the draught fan is started after defrosting is finished, the shrinkage speed for the injection molding part to reach the stable state from the thermal expansion state is reduced, and the service life of the injection molding part is prolonged. And abnormal sound generated by thermal expansion and cold contraction due to sudden temperature change in the shrinkage process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a refrigerator and a noise reduction method thereof. Background Art

[0002] At present, the refrigerator adopts a foaming process. When the refrigerator defrosts, the overall temperature inside the refrigerator is relatively high. Especially when the foam in the freezer changes from cold to hot, thermal expansion and contraction will occur. The sound emitted by the injection molded parts is dense and rapid noise, resulting in a poor on-site experience for users. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a refrigerator and a noise reduction method thereof, which shorten the time for the injection molded parts to reach a stable state from the frozen state by increasing the compressor speed, reduce the number of abnormal noises generated due to thermal expansion and contraction, and turn on the fan after the defrosting ends to slow down the contraction speed of the injection molded parts from the thermally expanded state to the stable state, and reduce the abnormal noises generated due to the sudden temperature change during the contraction process.

[0004] The refrigerator provided in the first embodiment of the present invention includes:

[0005] A box body, which serves as a support structure of the refrigerator and is internally provided with several compartments;

[0006] A refrigeration system, which is arranged in the box body and includes a compressor, a condenser, an evaporator and a fan;

[0007] The compressor is used to provide power for the refrigeration cycle of the refrigerator and compress the refrigerant with low temperature and low pressure into a refrigerant gas with high temperature and high pressure;

[0008] The condenser is used to condense and dissipate heat from the refrigerant gas with high temperature and high pressure, and cool the refrigerant gas with high temperature and high pressure into a refrigerant liquid with normal temperature and high pressure;

[0009] The evaporator is used to evaporate and absorb heat from the refrigerant liquid with normal temperature and high pressure, and vaporize the refrigerant liquid with normal temperature and high pressure into a gas with low temperature and low pressure;

[0010] The fan is used to make air enter the evaporator of the refrigerator for heat exchange and send the air after heat release to the compartments inside the refrigerator;

[0011] The controller is configured to, when the refrigerator defrosts, collect the number of abnormal noises and the sound power that occur within a preset time; calculate an abnormal noise value according to the number of abnormal noises, the preset time and the sound power, and adjust the power of the heater and the speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range; when the defrosting of the refrigerator ends, turn off the heater and turn on the fan to operate until the compressor is turned on.

[0012] In the refrigerator provided by the second embodiment of the present invention, the calculation formula of the abnormal noise value is:

[0013] K = f × t × dB;

[0014] In the formula, K represents the abnormal noise value; f represents the number of abnormal noise occurrences; t represents the preset time; dB represents the sound power.

[0015] In the refrigerator provided by the third embodiment of the present invention, when the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power that occur within the preset time; calculate the abnormal noise value according to the number of abnormal noise occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range, specifically including:

[0016] When the refrigerator starts to defrost, collect the first number of abnormal noise occurrences and the first sound power that occur within the first preset time;

[0017] Calculate the first abnormal noise value according to the first number of abnormal noise occurrences, the first preset time, and the first sound power;

[0018] Adjust the power of the heater according to the magnitude relationship between the first abnormal noise value and the preset abnormal noise value range;

[0019] When the refrigerator is in the defrost recovery period, collect the second number of abnormal noise occurrences and the second sound power that occur within the second preset time;

[0020] Calculate the second abnormal noise value according to the second number of abnormal noise occurrences, the second preset time, and the second sound power;

[0021] Adjust the rotation speed of the compressor according to the magnitude relationship between the second abnormal noise value and the preset abnormal noise value range.

[0022] In the refrigerator provided by the fourth embodiment of the present invention, adjusting the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range specifically includes:

[0023] When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotation speed of the compressor to be the first rotation speed;

[0024] When the abnormal noise value is within the second abnormal noise value range, increase the power of the heater to the second power and the rotation speed of the compressor to the second rotation speed;

[0025] When the abnormal noise value is within the third abnormal noise value range, increase the power of the heater to the third power and the rotation speed of the compressor to the third rotation speed.

[0026] In the refrigerator provided by the fifth embodiment of the present invention, the power of the heater and the rotational speed of the compressor are both directly proportional to the magnitude of the abnormal noise value.

[0027] In the refrigerator noise reduction method provided by the sixth embodiment of the present invention, the method is applied to a refrigerator including a box body and a refrigeration system; wherein, several compartments are provided inside the box body; the refrigeration system includes a compressor, a condenser, an evaporator, and a blower; the compressor is used to provide power for the refrigeration cycle of the refrigerator and compress the refrigerant with low temperature and low pressure into a refrigerant gas with high temperature and high pressure; the blower is used to make air enter the evaporator of the refrigerator for heat exchange and send the air after heat release into the compartments of the refrigerator. The refrigerator noise reduction method includes:

[0028] When the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power within a preset time.

[0029] Calculate the abnormal noise value according to the number of abnormal noise occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range.

[0030] When the defrosting of the refrigerator ends, turn off the heater and turn on the blower to run until the compressor is turned on.

[0031] In the refrigerator noise reduction method provided by the seventh embodiment of the present invention, the calculation formula for the abnormal noise value is:

[0032] K = f × t × dB;

[0033] In the formula, K represents the abnormal noise value; f represents the number of abnormal noise occurrences; t represents the preset time; dB represents the sound power.

[0034] In the refrigerator noise reduction method provided by the eighth embodiment of the present invention, when the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power within a preset time; calculate the abnormal noise value according to the number of abnormal noise occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range, specifically including:

[0035] When the refrigerator starts to defrost, collect the first number of abnormal noise occurrences and the first sound power within the first preset time.

[0036] Calculate the first abnormal noise value according to the first number of abnormal noise occurrences, the first preset time, and the first sound power.

[0037] Adjust the power of the heater according to the magnitude relationship between the first abnormal noise value and the preset abnormal noise value range.

[0038] When the refrigerator is in the defrost recovery period, collect the second abnormal noise count and the second sound power that occur within the second preset time;

[0039] Calculate a second abnormal noise value according to the second abnormal noise count, the second preset time, and the second sound power;

[0040] Adjust the rotation speed of the compressor according to the magnitude relationship between the second abnormal noise value and the preset abnormal noise value range.

[0041] In the refrigerator noise reduction method provided by the ninth embodiment of the present invention, the adjusting the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range specifically includes:

[0042] When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotation speed of the compressor to be the first rotation speed;

[0043] When the abnormal noise value is within the second abnormal noise value range, increase the power of the heater to the second power and the rotation speed of the compressor to the second rotation speed;

[0044] When the abnormal noise value is within the third abnormal noise value range, increase the power of the heater to the third power and the rotation speed of the compressor to the third rotation speed.

[0045] In the refrigerator noise reduction method provided by the tenth embodiment of the present invention, both the power of the heater and the rotation speed of the compressor are directly proportional to the magnitude of the abnormal noise value.

[0046] Compared with the prior art, the beneficial effects of a refrigerator and its noise reduction method provided by the embodiments of the present invention are as follows: When the refrigerator defrosts, collect the abnormal noise count and the sound power that occur within the preset time; calculate the abnormal noise value according to the abnormal noise count, the preset time, and the sound power, and adjust the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range; when the refrigerator defrosting ends, turn off the heater and turn on the fan to run until the compressor starts. The embodiments of the present invention shorten the time for the injection molded part to reach the stable state from the frozen state by increasing the rotation speed of the compressor, reduce the number of abnormal noises generated due to thermal expansion and contraction, and turn on the fan after defrosting ends to slow down the contraction speed of the injection molded part from the thermally expanded state to the stable state, reducing the abnormal noises generated due to the sudden temperature change and thermal expansion and contraction during the contraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 2It is a schematic structural diagram of a refrigerator cabinet provided by an embodiment of the present invention;

[0049] Figure 3 It is a schematic structural diagram of a dual-refrigeration system of a refrigerator provided by an embodiment of the present invention;

[0050] Figure 4 It is a schematic structural diagram of a dual-refrigeration system of a refrigerator provided by an embodiment of the present invention;

[0051] Figure 5 It is the temperature change curve of defrosting and defrosting recovery period of a refrigerator in the prior art;

[0052] Figure 6 It is the temperature change curve of defrosting and defrosting recovery period of a refrigerator provided by an embodiment of the present invention;

[0053] Figure 7 It is the first working flow chart of a controller in a refrigerator provided by an embodiment of the present invention;

[0054] Figure 8 It is the second working flow chart of a controller in a refrigerator provided by an embodiment of the present invention;

[0055] Figure 9 It is the corresponding relationship diagram of abnormal noise value, power and rotational speed in a refrigerator provided by an embodiment of the present invention;

[0056] Figure 10 It is the schematic flow chart of a refrigerator noise reduction method provided by an embodiment of the present invention. Detailed implementation manners

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0060] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention. The refrigerator provided by the embodiment of the present invention includes:

[0062] A cabinet 10, which serves as the support structure of the refrigerator and is internally provided with a plurality of compartments;

[0063] A refrigeration system 20, which is arranged inside the cabinet and includes a compressor, a condenser, an evaporator, and a blower;

[0064] The compressor is used to provide power for the refrigeration cycle of the refrigerator and compress the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant gas;

[0065] The condenser is used to condense and dissipate heat from the high-temperature and high-pressure refrigerant gas and cool the high-temperature and high-pressure refrigerant gas into a normal-temperature and high-pressure refrigerant liquid;

[0066] The evaporator is used to evaporate and absorb heat from the normal-temperature and high-pressure refrigerant liquid and vaporize the normal-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure gas;

[0067] The blower is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the air after heat release into the compartments of the refrigerator;

[0068] The controller 30 is configured to, when the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power that occur within a preset time; calculate an abnormal noise value based on the number of abnormal noise occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and a preset abnormal noise value range; when the defrosting of the refrigerator ends, turn off the heater and turn on the blower to operate until the compressor is turned on.

[0069] Specifically, a refrigerator provided by an embodiment of the present invention includes a box body 10, a refrigeration system 20, and a controller 30. Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a box body of a refrigerator provided by an embodiment of the present invention. The refrigerator in this embodiment has an approximate cuboid shape. The refrigerator includes a box body 10 that defines a storage space. The box body 10 serves as a support structure of the refrigerator and has a chamber inside. Among them, the chamber includes a component storage chamber for placing components in the refrigerator, such as a compressor, etc., and also includes a storage space for storing foods, etc. Among them, the storage space can be divided into multiple storage chambers (i.e., compartments). According to different uses, the storage chambers can be configured as a refrigerating chamber, a freezing chamber, and a variable temperature chamber (also called a fresh-keeping chamber). One or more door bodies 200 are provided at the opening of each storage chamber. For example, in Figure 2 , the upper storage chamber is a refrigerating chamber, and it is provided with double door bodies. Among them, the door body 200 includes a door body outer shell 210 located outside the box body 10, a door body inner liner 220 located inside the box body 10, an upper end cover 230, a lower end cover 240, and a heat insulation layer located between the door body outer shell 210, the door body inner liner 220, the upper end cover 230, and the lower end cover 240; generally, the heat insulation layer is filled with foaming material. Among them, the door body can be pivotally arranged at the opening of the box body, or can also be opened in a drawer type to achieve drawer-type storage.

[0070] The refrigerator performs a refrigeration operation through the refrigeration system, provides cold quantity transmission into the compartments, so that the compartments are maintained at a constant low temperature state. Specifically, the refrigeration system of the refrigerator in this embodiment can be a single refrigeration system or a dual refrigeration system. Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a single refrigeration system of a refrigerator provided by an embodiment of the present invention. The single refrigeration system of the refrigerator described in the embodiment of the present invention includes a compressor 1, a condenser 2, an anti-condensation pipe 3, a drying filter 4, a capillary tube 5, an evaporator 6, and a gas-liquid separator 7. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0071] Among them, the compression process is as follows: Plug in the power cord of the refrigerator. When there is a refrigeration requirement in the box body, the compressor 1 starts to work. The low-temperature and low-pressure refrigerant is sucked into the compressor, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 2;

[0072] The condensation process is as follows: The high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 2, the temperature continuously drops, and it is gradually cooled into a normal-temperature and high-pressure saturated vapor, and further cooled into a saturated liquid, and the temperature no longer drops. At this time, the temperature is called the condensation temperature, and the pressure of the refrigerant is almost unchanged during the entire condensation process;

[0073] The throttling process is as follows: The saturated liquid refrigerant after condensation flows through the drying filter 4 to remove moisture and impurities, and then flows into the capillary tube 5. Through it, the refrigerant is throttled and depressurized, and becomes a wet vapor at normal temperature and low pressure.

[0074] The evaporation process is as follows: Subsequently, it starts to absorb heat and vaporize in the evaporator 6, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a gas at low temperature and low pressure. The refrigerant coming out of the evaporator 6 returns to the compressor 1 again after passing through the gas-liquid separator 7. By repeating the above process, the heat in the refrigerator is transferred to the air outside the box, achieving the purpose of refrigeration.

[0075] The fan makes the air continuously enter the fins of the evaporator 6 for heat exchange, and at the same time sends the air cooled after releasing heat by the evaporator 6 to the refrigerator compartment through the air duct. In this way, the air in the compartment circulates continuously, achieving the purpose of reducing the temperature.

[0076] Please refer to Figure 4 , Figure 4 FIG. is a schematic structural diagram of a dual-refrigeration system of a refrigerator provided by an embodiment of the present invention. The dual-refrigeration system of the refrigerator described in the embodiment of the present invention includes a compressor 21 for compressing the refrigerant, a first capillary tube 14a and a second capillary tube 14b for decompressing the refrigerant, a refrigerating evaporator 15a and a freezing evaporator 15b as heat absorption mechanisms, a three-way valve 17 for controlling the refrigerant flow path, a check valve 18 for preventing the refrigerant from flowing backward, a dryer 19 for removing moisture in the freezing cycle, and a refrigerant confluence port 13 for connecting the refrigerant flow path. They are connected by a pipe 20 to circulate the refrigerant and form a freezing cycle. In this process, the fans 12a and 12b respectively provided for each storage compartment are used to accelerate the air flow rate, thereby accelerating the heat absorption speed of the refrigerating evaporator and the freezing evaporator, and enhancing the refrigeration speed of the storage compartment. Among them, the three-way valve 17 has a first outlet 17a and a second outlet 17b. When the three-way valve 17 is controlled to make the first outlet 17a conduct, the refrigerant flows in sequence through the first capillary tube 14a, the refrigerating evaporator 15a, the gas-liquid separator 16a, the refrigerant confluence port 13, and then returns to the compressor 21. After passing through the first capillary tube 14a, the refrigerant at low pressure and low temperature flows in the refrigerating evaporator 15a, exchanges heat with the air in the refrigerating evaporator 15a and the refrigerator compartment 110, and refrigerates the refrigerator compartment 110. Similarly, when the three-way valve 17 is controlled to make the second outlet 17b conduct, the refrigerant flows in sequence through the second capillary tube 14b, the freezing evaporator 15b, the gas-liquid separator 16b, the refrigerant confluence port 13, and then returns to the compressor 21. After passing through the second capillary tube 14b, the refrigerant at low pressure and low temperature flows in the freezing evaporator 15b, exchanges heat with the air in the freezing evaporator 15b and the freezer compartment 120, and refrigerates the freezer compartment 120.

[0077] Please refer to Figure 5, Figure 5 is the temperature change curve during the defrosting and defrosting recovery period of a refrigerator in the prior art. When the refrigerator is defrosting, the overall temperature inside the cabinet is relatively high. Especially when the foam in the freezer changes from cold to hot, thermal expansion and contraction will occur. The sound emitted by the injection-molded parts is dense and rapid noise, resulting in a poor on-site experience for users. After the defrosting of the refrigerator ends, there will be a contraction process when it changes from hot to cold, and abnormal noises are also generated during the contraction process. According to the reasons for thermal expansion and contraction, the shrinkage deformation of the injection-molded parts caused by temperature changes, the relative displacement and friction during the deformation process generate abnormal noises. Then, the magnitude of the abnormal noise is directly related to the relative time formed by the displacement. That is to say, the abnormal noise caused by sudden cooling and sudden heating is greater than that caused by gradual temperature change. Therefore, in the embodiments of the present invention, through the control logic, the temperature change rate is adjusted to reduce the sound caused by sudden temperature change. In the embodiments of the present invention, the test mainly counts the number of abnormal noises within 10 minutes of turning on and off the machine, and it is found that the injection-molded parts basically reach a stable state after receiving the temperature change within 10 minutes. Therefore, while slowing down the sudden change, a scheme for accelerating the achievement of the stable state can also be considered.

[0078] Please refer to Figure 6 , Figure 6 is the temperature change curve during the defrosting and defrosting recovery period of a refrigerator provided by an embodiment of the present invention. When the refrigerator is defrosting in the embodiments of the present invention, the number of abnormal noises and the sound power that occur within a preset time, such as within 10 minutes, are collected. For the convenience of control, the abnormal noise value is calculated according to the number of abnormal noises, the preset time, and the sound power, and the abnormal noise value is divided into multiple levels for control. According to the size relationship between the abnormal noise value and the preset abnormal noise value range, the power of the heater and the rotation speed of the compressor are adjusted without affecting the noise, so that the time for the injection-molded parts to reach the stable state from the frozen state can be shortened, and the number of abnormal noises generated due to thermal expansion and contraction can be reduced. After the defrosting of the refrigerator ends, the heater is turned off, and the fan is turned on and runs until the compressor is turned on, so as to slow down the contraction speed of the injection-molded parts from the thermally expanded state to the stable state, and reduce the abnormal noise generated due to thermal expansion and contraction caused by sudden temperature change during the contraction process.

[0079] In the embodiments of the present invention, the time for the injection-molded parts to reach the stable state from the frozen state is shortened by increasing the rotation speed of the compressor, the number of abnormal noises generated due to thermal expansion and contraction is reduced, and the fan is turned on after the defrosting ends to slow down the contraction speed of the injection-molded parts from the thermally expanded state to the stable state, and reduce the abnormal noise generated due to thermal expansion and contraction caused by sudden temperature change during the contraction process.

[0080] As one of the optional embodiments, the calculation formula for the abnormal noise value is:

[0081] K = f × t × dB;

[0082] In the formula, K represents the abnormal noise value; f represents the number of abnormal noises; t represents the preset time; dB represents the sound power.

[0083] Specifically, in the embodiments of the present invention, the number of abnormal noise occurrences f and the sound power dB that occur within a preset time t are collected, and an abnormal noise value K = f × t × dB is calculated based on the number of abnormal noise occurrences f, the preset time t, and the sound power dB.

[0084] As one optional embodiment, when the refrigerator defrosts, the number of abnormal noise occurrences and the sound power that occur within a preset time are collected; an abnormal noise value is calculated based on the number of abnormal noise occurrences, the preset time, and the sound power, and the power of the heater and the rotational speed of the compressor are adjusted according to the magnitude relationship between the abnormal noise value and a preset abnormal noise value range. Specifically, it includes:

[0085] When the refrigerator starts to defrost, the first number of abnormal noise occurrences and the first sound power that occur within a first preset time are collected;

[0086] A first abnormal noise value is calculated based on the first number of abnormal noise occurrences, the first preset time, and the first sound power;

[0087] The power of the heater is adjusted according to the magnitude relationship between the first abnormal noise value and the preset abnormal noise value range;

[0088] When the refrigerator is in the defrost recovery period, the second number of abnormal noise occurrences and the second sound power that occur within a second preset time are collected;

[0089] A second abnormal noise value is calculated based on the second number of abnormal noise occurrences, the second preset time, and the second sound power;

[0090] The rotational speed of the compressor is adjusted according to the magnitude relationship between the second abnormal noise value and the preset abnormal noise value range.

[0091] Specifically, please refer to Figure 7 , Figure 7It is the first working flow chart of a controller in a refrigerator provided by an embodiment of the present invention. In the embodiment of the present invention, when the compressor stops and the refrigerator starts defrosting, the first abnormal noise count and the first sound power that occur within the first preset time are collected; according to the first abnormal noise count, the first preset time, and the first sound power, the first abnormal noise value K1 is calculated; according to the magnitude relationship between the first abnormal noise value K1 and the preset abnormal noise value range, the power of the heater is adjusted. When the refrigerator is in the defrost recovery period, the second abnormal noise count and the second sound power that occur within the second preset time are collected; according to the second abnormal noise count, the second preset time, and the second sound power, the second abnormal noise value K2 is calculated; according to the magnitude relationship between the second abnormal noise value K2 and the preset abnormal noise value range, the rotation speed of the compressor is adjusted. After the refrigerator defrosting ends, the heater is turned off, the fan is turned on and runs until the compressor is turned on, and normal refrigeration starts, so as to slow down the contraction speed of the injection molded part from the thermal expansion state to the stable state, and reduce the abnormal noise generated by thermal expansion and contraction due to sudden temperature change during the contraction process.

[0092] As one optional embodiment, adjusting the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range specifically includes:

[0093] When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotation speed of the compressor to be the first rotation speed;

[0094] When the abnormal noise value is within the second abnormal noise value range, increase the power of the heater to the second power and the rotation speed of the compressor to the second rotation speed;

[0095] When the abnormal noise value is within the third abnormal noise value range, increase the power of the heater to the third power and the rotation speed of the compressor to the third rotation speed.

[0096] Specifically, please refer to Figure 8 , Figure 8 It is the second working flow chart of a controller in a refrigerator provided by an embodiment of the present invention. In the embodiment of the present invention, when adjusting the power of the heater and the rotation speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range, the magnitude relationship between the abnormal noise value and the preset abnormal noise value range is judged. When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotation speed of the compressor to be the first rotation speed. When the abnormal noise value is within the second abnormal noise value range, increase the power of the heater to the second power and increase the rotation speed of the compressor to the second rotation speed. When the abnormal noise value is within the third abnormal noise value range, increase the power of the heater to the third power and increase the rotation speed of the compressor to the third rotation speed.

[0097] Exemplarily, please refer to Figure 9 , Figure 9It is a corresponding relationship diagram of abnormal noise value, power and rotational speed in a refrigerator provided by an embodiment of the present invention. When the abnormal noise value K ≤ 200 (times * dB * min), the heater power is 80 - 100 W and the compressor rotational speed is 900 revolutions. When the abnormal noise value K satisfies 200 < K ≤ 400 (times * dB * min), the heater power is 100 - 120 W and the compressor rotational speed is 1100 revolutions. When the abnormal noise value K satisfies 400 < Te ≤ 600 (times * dB * min), the heater power is 120 - 150 W and the compressor rotational speed is 1300 revolutions.

[0098] As one optional embodiment, both the power of the heater and the rotational speed of the compressor are directly proportional to the magnitude of the abnormal noise value.

[0099] Specifically, in the embodiment of the present invention, both the power of the heater and the rotational speed of the compressor are directly proportional to the magnitude of the abnormal noise value. The larger the abnormal noise value, the higher the power of the heater and the rotational speed of the compressor accordingly, thereby accelerating the achievement of the stable state, shortening the time for the injection molded part to reach the stable state from the frozen state, and reducing the number of abnormal noises generated due to thermal expansion and contraction.

[0100] Please refer to Figure 10 , Figure 10 It is a schematic flowchart of a refrigerator noise reduction method provided by an embodiment of the present invention. The refrigerator noise reduction method provided in the embodiment of the present invention is applied to a refrigerator including a box body and a refrigeration system; wherein, several compartments are provided inside the box body; the refrigeration system is arranged in the box body and includes a compressor, a condenser, an evaporator and a blower; the compressor is used to provide power for the refrigeration cycle of the refrigerator and compress the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant gas; the condenser is used to condense and dissipate heat from the high-temperature and high-pressure refrigerant gas and cool the high-temperature and high-pressure refrigerant gas into a normal-temperature and high-pressure refrigerant liquid; the evaporator is used to evaporate and absorb heat from the normal-temperature and high-pressure refrigerant liquid and vaporize the normal-temperature and high-pressure refrigerant liquid into a low-temperature and low-pressure gas; the blower is used to make air enter the evaporator of the refrigerator for heat exchange and send the air after heat release to the refrigerator compartment. The refrigerator noise reduction method includes:

[0101] S1, when the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power within a preset time.

[0102] S2, calculate the abnormal noise value according to the number of abnormal noises, the preset time and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the size relationship between the abnormal noise value and the preset abnormal noise value range.

[0103] S3, when the refrigerator defrosting ends, turn off the heater and turn on the blower to run until the compressor is turned on.

[0104] In the embodiment of the present invention, when the refrigerator defrosts, the number of abnormal noises and the sound power that occur within a preset time, for example, within 10 minutes, are collected. For the convenience of control, an abnormal noise value is calculated based on the number of abnormal noises, the preset time, and the sound power. The abnormal noise value is divided into multiple levels for control. According to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range, the power of the heater and the rotational speed of the compressor are adjusted without affecting the noise, so as to shorten the time for the injection molded part to reach the stable state from the frozen state and reduce the number of abnormal noises generated due to thermal expansion and contraction. After the refrigerator defrosting is completed, the heater is turned off, and the blower is turned on and runs until the compressor is turned on, thereby slowing down the contraction speed of the injection molded part from the thermal expansion state to the stable state and reducing the abnormal noises generated due to thermal expansion and contraction caused by sudden temperature changes during the contraction process.

[0105] In the embodiment of the present invention, the time for the injection molded part to reach the stable state from the frozen state is shortened by increasing the rotational speed of the compressor, the number of abnormal noises generated due to thermal expansion and contraction is reduced, and the blower is turned on after the defrosting is completed to slow down the contraction speed of the injection molded part from the thermal expansion state to the stable state and reduce the abnormal noises generated due to thermal expansion and contraction caused by sudden temperature changes during the contraction process.

[0106] As one of the optional embodiments, the calculation formula for the abnormal noise value is:

[0107] K = f × t × dB;

[0108] In the formula, K represents the abnormal noise value; f represents the number of abnormal noises; t represents the preset time; dB represents the sound power.

[0109] Specifically, in the embodiment of the present invention, the number of abnormal noises f and the sound power dB that occur within the preset time t are collected, and based on the number of abnormal noises f, the preset time t, and the sound power dB, the abnormal noise value K = f × t × dB is calculated.

[0110] As one of the optional embodiments, when the refrigerator defrosts, the number of abnormal noises and the sound power that occur within the preset time are collected; an abnormal noise value is calculated based on the number of abnormal noises, the preset time, and the sound power, and according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range, the power of the heater and the rotational speed of the compressor are adjusted, which specifically includes:

[0111] When the refrigerator starts to defrost, the first number of abnormal noises and the first sound power that occur within the first preset time are collected;

[0112] Based on the first number of abnormal noises, the first preset time, and the first sound power, a first abnormal noise value is calculated;

[0113] Based on the magnitude relationship between the first abnormal noise value and the preset abnormal noise value range, the power of the heater is adjusted;

[0114] When the refrigerator is in the defrost recovery period, collect the second abnormal noise count and the second sound power that occur within the second preset time;

[0115] Calculate a second abnormal noise value based on the second abnormal noise count, the second preset time, and the second sound power;

[0116] Adjust the rotational speed of the compressor according to the magnitude relationship between the second abnormal noise value and the preset abnormal noise value range.

[0117] Specifically, in the embodiment of the present invention, when the compressor stops and the refrigerator starts to defrost, collect the first abnormal noise count and the first sound power that occur within the first preset time; calculate a first abnormal noise value K1 based on the first abnormal noise count, the first preset time, and the first sound power; adjust the power of the heater according to the magnitude relationship between the first abnormal noise value K1 and the preset abnormal noise value range. When the refrigerator is in the defrost recovery period, collect the second abnormal noise count and the second sound power that occur within the second preset time; calculate a second abnormal noise value K2 based on the second abnormal noise count, the second preset time, and the second sound power; adjust the rotational speed of the compressor according to the magnitude relationship between the second abnormal noise value K2 and the preset abnormal noise value range. After the refrigerator defrosts, turn off the heater, turn on the fan and run it until the compressor starts, and start normal refrigeration, so as to slow down the contraction speed of the injection molded part from the thermal expansion state to the stable state and reduce the abnormal noise generated by thermal expansion and contraction due to sudden temperature changes during the contraction process.

[0118] As one of the optional embodiments, the adjusting the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and the preset abnormal noise value range specifically includes:

[0119] When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotational speed of the compressor to be the first rotational speed;

[0120] When the abnormal noise value is within the second abnormal noise value range, increase the power of the heater to the second power and the rotational speed of the compressor to the second rotational speed;

[0121] When the abnormal noise value is within the third abnormal noise value range, increase the power of the heater to the third power and the rotational speed of the compressor to the third rotational speed.

[0122] Specifically, when adjusting the power of the heater and the rotational speed of the compressor according to the relationship between the abnormal noise value and the preset abnormal noise value range in the embodiments of the present invention, the relationship between the abnormal noise value and the preset abnormal noise value range is judged. When the abnormal noise value is within the first abnormal noise value range, the power of the heater is controlled to be the first power, and the rotational speed of the compressor is the first rotational speed. When the abnormal noise value is within the second abnormal noise value range, the power of the heater is increased to the second power, and the rotational speed of the compressor is increased to the second rotational speed. When the abnormal noise value is within the third abnormal noise value range, the power of the heater is increased to the third power, and the rotational speed of the compressor is increased to the third rotational speed.

[0123] Exemplarily, when the abnormal noise value K ≤ 200 (times * dB * min), the power of the heater is 80 - 100 W, and the rotational speed of the compressor is 900 revolutions. When the abnormal noise value K satisfies 200 < K ≤ 400 (times * dB * min), the power of the heater is 100 - 120 W, and the rotational speed of the compressor is 1100 revolutions. When the abnormal noise value K satisfies 400 < Te ≤ 600 (times * dB * min), the power of the heater is 120 - 150 W, and the rotational speed of the compressor is 1300 revolutions.

[0124] As one of the optional embodiments, both the power of the heater and the rotational speed of the compressor are directly proportional to the magnitude of the abnormal noise value.

[0125] Specifically, in the embodiments of the present invention, both the power of the heater and the rotational speed of the compressor are directly proportional to the magnitude of the abnormal noise value. The larger the abnormal noise value, the higher the power of the heater and the rotational speed of the compressor accordingly, thereby accelerating the achievement of the stable state, shortening the time for the injection molded part to reach the stable state from the frozen state, and reducing the number of abnormal noises generated due to thermal expansion and contraction.

[0126] The embodiments of the present invention provide a refrigerator and its noise reduction method. When the refrigerator defrosts, the number of abnormal noise occurrences and the sound power within a preset time are collected; an abnormal noise value is calculated based on the number of abnormal noises, the preset time, and the sound power, and the power of the heater and the rotational speed of the compressor are adjusted according to the relationship between the abnormal noise value and the preset abnormal noise value range; after the refrigerator defrosting ends, the heater is turned off, and the blower is turned on and runs until the compressor is turned on. The embodiments of the present invention shorten the time for the injection molded part to reach the stable state from the frozen state by increasing the rotational speed of the compressor, reduce the number of abnormal noises generated due to thermal expansion and contraction, and turn on the blower after defrosting ends to slow down the contraction speed of the injection molded part from the thermal expansion state to the stable state, and reduce the abnormal noises generated due to thermal expansion and contraction caused by the sudden temperature change during the contraction process.

[0127] It should be noted that the system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the accompanying drawings of the system embodiments provided by the present invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement without creative efforts.

[0128] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A refrigerator, characterized in that, Comprising: A box body, which serves as a support structure of the refrigerator and is internally provided with a plurality of compartments; A refrigeration system, which is arranged in the box body and includes a compressor, a condenser, an evaporator and a blower; The compressor is used to provide power for the refrigeration cycle of the refrigerator, and compress the refrigerant with low temperature and low pressure into a refrigerant gas with high temperature and high pressure; The condenser is used to condense and dissipate heat from the refrigerant gas with high temperature and high pressure, and cool the refrigerant gas with high temperature and high pressure into a refrigerant liquid with normal temperature and high pressure; The evaporator is used to evaporate and absorb heat from the refrigerant liquid with normal temperature and high pressure, and vaporize the refrigerant liquid with normal temperature and high pressure into a gas with low temperature and low pressure; The blower is used to make air enter the evaporator of the refrigerator for heat exchange and send the air after heat release into the compartments of the refrigerator; The controller is configured to, when the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power within a preset time; calculate an abnormal noise value according to the number of abnormal noise occurrences, the preset time and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and a preset abnormal noise value range; After the refrigerator defrosting ends, turn off the heater and turn on the blower to operate until the compressor is turned on.

2. The refrigerator according to claim 1, characterized in that, The calculation formula of the abnormal noise value is: K = f × t × dB; In the formula, K represents the abnormal noise value; f represents the number of abnormal noise occurrences; t represents the preset time; dB represents the sound power.

3. The refrigerator according to claim 2, characterized in that, When the refrigerator defrosts, collect the number of abnormal noise occurrences and the sound power within a preset time; calculate an abnormal noise value according to the number of abnormal noise occurrences, the preset time and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and a preset abnormal noise value range, specifically including: When the refrigerator starts to defrost, collect the first number of abnormal noise occurrences and the first sound power of abnormal noise within the first preset time; Calculate a first abnormal noise value according to the first number of abnormal noise occurrences, the first preset time and the first sound power; Adjust the power of the heater according to the magnitude relationship between the first abnormal noise value and the preset abnormal noise value range; When the refrigerator is in the defrost recovery period, collect the second number of abnormal noise occurrences and the second sound power of abnormal noise within the second preset time; Calculate a second abnormal noise value according to the second number of abnormal noise occurrences, the second preset time and the second sound power; Adjust the rotational speed of the compressor according to the magnitude relationship between the second abnormal noise value and the preset abnormal noise value range.

4. The refrigerator according to claim 2, wherein, Adjusting the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal noise value and a preset abnormal noise value range specifically includes: When the abnormal noise value is within the first abnormal noise value range, control the power of the heater to be the first power and the rotational speed of the compressor to be the first rotational speed; When the abnormal noise value is within the second abnormal noise value range, raise the power of the heater to the second power and the rotational speed of the compressor to the second rotational speed; When the abnormal noise value is within the third abnormal noise value range, raise the power of the heater to the third power and the rotational speed of the compressor to the third rotational speed.

5. The refrigerator according to claim 4, wherein The power of the heater and the rotational speed of the compressor are both directly proportional to the magnitude of the abnormal sound value.

6. A refrigerator noise reduction method, characterized in that, The method is applied to a refrigerator including a box body and a refrigeration system; wherein, several compartments are provided inside the box body; the refrigeration system includes a compressor, a condenser, an evaporator, and a blower; the compressor is used to provide power for the refrigeration cycle of the refrigerator, compressing a low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant gas; the blower is used to allow air to enter the evaporator of the refrigerator for heat exchange and send the air after heat release into the compartments of the refrigerator. The refrigerator noise reduction method includes: When the refrigerator defrosts, collect the number of abnormal sound occurrences and the sound power within a preset time. Calculate the abnormal sound value based on the number of abnormal sound occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal sound value and a preset abnormal sound value range. After the refrigerator defrosting ends, turn off the heater and turn on the blower to operate until the compressor is turned on.

7. The refrigerator noise reduction method according to claim 6, characterized in that, The calculation formula for the abnormal sound value is: K = f × t × dB; In the formula, K represents the abnormal sound value; f represents the number of abnormal sound occurrences; t represents the preset time; dB represents the sound power.

8. The refrigerator noise reduction method according to claim 7, wherein, When the refrigerator defrosts, collect the number of abnormal sound occurrences and the sound power within a preset time; calculate the abnormal sound value based on the number of abnormal sound occurrences, the preset time, and the sound power, and adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal sound value and a preset abnormal sound value range. Specifically, it includes: When the refrigerator starts to defrost, collect the first number of abnormal sound occurrences and the first sound power that occur within the first preset time. Calculate the first abnormal sound value based on the first number of abnormal sound occurrences, the first preset time, and the first sound power. Adjust the power of the heater according to the magnitude relationship between the first abnormal sound value and the preset abnormal sound value range. When the refrigerator is in the defrost recovery period, collect the second number of abnormal sound occurrences and the second sound power that occur within the second preset time. Calculate the second abnormal sound value based on the second number of abnormal sound occurrences, the second preset time, and the second sound power. Adjust the rotational speed of the compressor according to the magnitude relationship between the second abnormal sound value and the preset abnormal sound value range.

9. The refrigerator noise reduction method according to claim 7, wherein Adjust the power of the heater and the rotational speed of the compressor according to the magnitude relationship between the abnormal sound value and a preset abnormal sound value range. Specifically, it includes: When the abnormal sound value is within the first abnormal sound value range, control the power of the heater to be the first power and the rotational speed of the compressor to be the first rotational speed. When the abnormal sound value is within the second abnormal sound value range, increase the power of the heater to the second power and the rotational speed of the compressor to the second rotational speed. When the abnormal sound value is within the third abnormal sound value range, increase the power of the heater to the third power and the rotational speed of the compressor to the third rotational speed.

10. The refrigerator noise reduction method according to claim 9, characterized in that, The power of the heater and the rotational speed of the compressor are both directly proportional to the magnitude of the abnormal sound value.

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