Refrigerator and noise reduction control method thereof

Abstract

This invention discloses a refrigerator and its noise reduction control method, comprising: a cabinet with a compressor and a compartment inside; a compressor temperature detection device disposed on the compressor for detecting the compressor temperature; a compartment temperature detection device disposed inside the compartment for detecting the compartment temperature; and a controller for: acquiring a first compartment temperature detected by the compartment temperature detection device and a first compressor temperature detected by the compressor temperature detection device when the refrigerator is in a stable operating state; and controlling the compressor to reduce its speed if the first compressor temperature is greater than the preset first temperature threshold when the first compartment temperature is less than or equal to a preset compartment temperature threshold. This invention avoids excessively high compressor temperatures that could affect the operation of the internal muffler, thus ensuring optimal noise reduction and a superior user experience.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and more particularly to a refrigerator and its noise reduction control method. Background Technology

[0002] With the continuous development of technology and the improvement of people's living standards, the requirements for home appliances are also getting higher and higher. As an essential household appliance, the refrigerator is in a state of continuous operation. Therefore, when the user's living room is close to the refrigerator, the noise generated by the refrigerator during operation can have a great impact on the user's life.

[0003] The main source of refrigerator noise is the compressor noise during operation. Currently, the main method of refrigerator control is to control the compressor speed by controlling the ambient temperature of the refrigerator. In this case, when the refrigerator is in a stable ambient temperature, the compressor will maintain a fixed speed level, and the compressor temperature will continue to rise. This will cause the muffler inside the compressor to become unstable and partially decrease in its function, ultimately affecting the noise reduction effect and the user experience. Summary of the Invention

[0004] The purpose of this invention is to provide a refrigerator and its noise reduction control method, which can keep the muffler inside the compressor at an optimal level, thereby enabling the muffler to achieve the best noise reduction effect and providing a high-quality user experience.

[0005] To achieve the above objectives, embodiments of the present invention provide a refrigerator, comprising:

[0006] The housing contains a compressor and a compartment.

[0007] A compressor temperature detection device is installed on the compressor and is used to detect the compressor temperature.

[0008] A room temperature detection device is installed inside the room to detect the room temperature;

[0009] Controller, used for:

[0010] When the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device are obtained.

[0011] When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced.

[0012] As an improvement to the above solution, the controller is also used for:

[0013] When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0014] As an improvement to the above solution, before the refrigerator enters the stable operating state, the controller is further configured to:

[0015] The second compartment temperature detected by the compartment temperature detection device and the second compressor temperature detected by the compressor temperature detection device are obtained; when the second compartment temperature is less than or equal to the compartment temperature threshold, if the second compressor temperature is greater than a preset second temperature threshold, the compressor speed is controlled to be reduced; wherein, the second temperature threshold is greater than the first temperature threshold.

[0016] As an improvement to the above solution, the controller is also used for:

[0017] When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0018] As an improvement to the above solution, the controller is also used for:

[0019] In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed;

[0020] During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

[0021] To achieve the above objectives, this invention also provides a noise reduction control method for a refrigerator, wherein the refrigerator includes at least: a compressor temperature detection device disposed on the refrigerator compressor and a compartment temperature detection device disposed in the refrigerator compartment, and the noise reduction control method for the refrigerator includes:

[0022] When the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device are obtained.

[0023] When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced.

[0024] As an improvement to the above solution, the noise reduction control method for the refrigerator further includes:

[0025] When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0026] As an improvement to the above solution, before the refrigerator enters the stable operating state, the noise reduction control method for the refrigerator further includes:

[0027] The temperature of the second compartment detected by the compartment temperature detection device and the temperature of the second compressor detected by the compressor temperature detection device are obtained;

[0028] When the temperature of the second compartment is less than or equal to the temperature threshold of the compartment, if the temperature of the second compressor is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced; wherein, the second temperature threshold is greater than the first temperature threshold.

[0029] As an improvement to the above solution, the noise reduction control method for the refrigerator further includes:

[0030] When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0031] As an improvement to the above solution, the noise reduction control method for the refrigerator further includes:

[0032] In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed;

[0033] During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

[0034] Compared with existing technologies, the refrigerator and its noise reduction control method provided in this embodiment of the invention, by setting up a compressor temperature detection device and a compartment temperature detection device, acquires a first compartment temperature detected by the compartment temperature detection device and a first compressor temperature detected by the compressor temperature detection device when the refrigerator is in a stable operating state. When the first compartment temperature is less than or equal to a preset compartment temperature threshold, if the first compressor temperature is greater than the preset first temperature threshold, the compressor speed is controlled to be reduced. Therefore, this embodiment of the invention reduces the compressor speed when the compressor temperature is too high, preventing the compressor temperature from continuously rising and affecting the working level of the internal muffler, thus maintaining the muffler at an optimal level and maintaining the best noise reduction effect. The noise reduction control is more flexible and better meets actual needs. Moreover, as the compressor speed decreases, the noise generated by the compressor during operation also decreases, further improving the noise reduction effect. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural view of a refrigerator provided in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a refrigeration system in a refrigerator provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the fan provided in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the circuit connection structure of a refrigerator provided in an embodiment of the present invention;

[0039] Figure 5 This is a first working flowchart of the controller provided in an embodiment of the present invention;

[0040] Figure 6 This is a second workflow diagram of the controller provided in an embodiment of the present invention;

[0041] Figure 7 This is a third workflow diagram of the controller provided in an embodiment of the present invention;

[0042] Figure 8 This is the fourth workflow diagram of the controller provided in this embodiment of the invention;

[0043] Figure 9 This is a schematic diagram of the structure of a communication system provided in an embodiment of the present invention;

[0044] Figure 10 This is a flowchart of a noise reduction control method for a refrigerator provided in an embodiment of the present invention;

[0045] Among them, 100, refrigerator; 101, cabinet; 102, door; 200, client; 300, router; 400, cloud server; 1, compressor; 2, condenser; 3, anti-condensation pipe; 4, dryer filter; 5, capillary tube; 6, evaporator; 7, gas-liquid separator; 8, fan; 9, compressor temperature detection device; 10, compartment temperature detection device; 11, controller. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Reference Figure 1 , Figure 1This is a perspective view of a specific embodiment of a refrigerator according to this application. The refrigerator 100 of this embodiment has an approximately cuboid shape. The refrigerator 100 includes a cabinet 101 defining a storage space and multiple doors 102 disposed at the opening of the cabinet 101. Each door 102 includes a door shell located outside the cabinet 101, a door liner located inside the cabinet 101, an upper cover, a lower cover, and an insulation layer located between the door shell, the door liner, the upper cover, and the lower cover; typically, the insulation layer is filled with foam material. The cabinet 101 has chambers, including component storage chambers for placing refrigerator components, such as a compressor, and storage space for storing food. The compressor has a muffler inside. The storage space can be divided into multiple compartments, which can be configured as a refrigerator compartment, a freezer compartment, or a variable temperature compartment (also called a crisper compartment) depending on their purpose. Each compartment corresponds to one or more doors, for example, in… Figure 1 The upper storage compartment features double doors. These doors can be pivotally mounted at the opening of the cabinet or can open like drawers for drawer-style storage.

[0048] See Figures 2-3 The refrigeration system includes a compressor 1, a condenser 2, an anti-condensation tube 3, a dryer 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.

[0049] The compression process is as follows: When the refrigerator power cord is plugged in and the thermostat contacts are closed, compressor 1 starts working. Low-temperature, low-pressure refrigerant is drawn into compressor 1 and compressed into high-temperature, high-pressure superheated gas within the compressor 1 cylinder before being discharged into condenser 2. The condensation process is as follows: The high-temperature, high-pressure refrigerant gas dissipates heat through condenser 2, its temperature continuously decreasing until it is gradually cooled into room-temperature, high-pressure saturated vapor, and further cooled into saturated liquid. The temperature at this point no longer decreases; this temperature is called the condensation temperature. The pressure of the refrigerant remains almost constant throughout the entire condensation process. (Throttling) The process is as follows: After condensation, the saturated liquid refrigerant flows into the capillary tube 5 after being filtered to remove moisture and impurities through the dryer filter 4. There, it undergoes throttling and pressure reduction, transforming the refrigerant into a room-temperature, low-pressure wet vapor. The evaporation process involves the room-temperature, low-pressure wet vapor absorbing heat and vaporizing within the evaporator 6. This not only lowers the temperature of the evaporator and its surroundings but also transforms the refrigerant into a low-temperature, low-pressure gas. The refrigerant exiting the evaporator 6 passes through the gas-liquid separator 7 and returns to the compressor 1, repeating the above process to transfer heat from inside the refrigerator to the outside air, thus achieving the purpose of refrigeration. The fan 8 continuously draws air into the fins of the evaporator 6 for heat exchange, while simultaneously sending the cooled air from the evaporator 6 through the air duct to the refrigerator compartment and the freezer compartment. This continuous air circulation within the storage compartment further reduces the temperature.

[0050] See Figure 4 , Figure 4 This is a schematic diagram of the circuit connection structure of a refrigerator according to an embodiment of the present invention. The refrigerator further includes:

[0051] A compressor temperature detection device 9 is installed on the compressor to detect its temperature; for example, a temperature sensor is installed on the compressor to detect its surface temperature. It is understood that the compressor temperature is affected by the entire compressor compartment, not just by the temperature rise caused by the compressor's own operation, but also by the temperature rise caused by the fan, evaporator, etc. within the compartment. For example, when the fan blows air onto the compressor, its temperature will decrease. Therefore, this invention not only considers the impact of the compressor's own operation but also the influence of other equipment on the compressor, ensuring that the refrigerator's cooling function is maximized while ensuring the muffler operates at its optimal level.

[0052] A compartment temperature detection device 10 is installed inside the compartment to detect the temperature of the compartment; for example, a temperature sensor is installed on the inner wall of the compartment to detect the temperature of the compartment.

[0053] A controller 11 is connected to the compressor temperature detection device 9 and is used to receive the compressor temperature detected by the compressor temperature detection device 9. The controller 11 is also connected to the compartment temperature detection device 10 and is used to receive the compartment temperature detected by the compartment temperature detection device 10. The controller 11 is used for:

[0054] When the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device are obtained.

[0055] When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced.

[0056] In an alternative embodiment, the controller is further configured to:

[0057] When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0058] It is understood that when the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device can be continuously or periodically acquired. When the first compartment temperature is less than or equal to a preset compartment temperature threshold and the first compressor temperature is greater than the preset first temperature threshold, the compressor speed is controlled to be reduced. When the first compartment temperature is greater than the compartment temperature threshold, the compressor speed is controlled to be increased.

[0059] For example, see Figure 5 , Figure 5 This is a first flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S11 to S15:

[0060] S11. When the refrigerator is in a stable operating state, acquire the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device, and proceed to step S12.

[0061] S12. Determine whether the temperature of the first compartment is less than or equal to a preset compartment temperature threshold. If yes, proceed to step S13; otherwise, proceed to step S15.

[0062] S13. Determine whether the temperature of the first compressor is greater than the preset first temperature threshold. If yes, proceed to step S14; otherwise, return to step S13.

[0063] S14. Control the compressor to reduce its speed.

[0064] S15. Control the compressor to increase its speed.

[0065] It should be noted that refrigerator operating states can be categorized into several types, such as initial power-on state, stable operation state, and defrost recovery period state. Stable operation state refers to the state when the refrigerator's power or temperature is stable, while the defrost recovery period state refers to the state from the end of defrosting until normal cooling resumes.

[0066] Generally, when in user mode, the refrigerator is in a cold box state. Therefore, the refrigerator enters a stable operating state as soon as the compressor starts. At this time, the compressor is controlled to run at the target speed set in user mode, and the process proceeds directly to step S11. When in the first power-on mode, the refrigerator is in a hot box state. Therefore, the compressor needs to run at a high speed at the beginning. This is the first power-on state. Afterwards, as the refrigerator stabilizes, it enters a stable operating state and then proceeds to step S11. When in defrost recovery mode, the compressor speed is also high. This is the defrost recovery period state. Afterwards, as the refrigerator stabilizes, it enters a stable operating state and then proceeds to step S11.

[0067] Specifically, when the refrigerator is in a stable operating state, the first compartment temperature currently detected by the compartment temperature detection device and the first compressor temperature currently detected by the compressor temperature detection device are acquired. To ensure the refrigerator's cooling function, if the first compartment temperature is less than or equal to a preset compartment temperature threshold, it is determined whether the first compressor temperature is greater than the preset first temperature threshold. If so, it indicates that the compressor temperature is too high, which will affect the muffler's noise reduction effect. Therefore, the compressor speed is controlled to reduce the compressor temperature, allowing the muffler to work at its optimal level. At the same time, as the compressor speed decreases, the noise generated by the compressor during operation will also decrease, further improving the noise reduction effect. Moreover, an excessively high compressor temperature also indicates that the refrigerator's energy consumption is too high. Reducing the compressor speed at this time can also ensure that the refrigerator's energy consumption is optimized and can also prevent the compressor from operating at a high level continuously, which would affect its service life.

[0068] In an optional embodiment, before the refrigerator enters the stable operating state, the controller is further configured to:

[0069] The temperature of the second compartment detected by the compartment temperature detection device and the temperature of the second compressor detected by the compressor temperature detection device are obtained;

[0070] When the temperature of the second compartment is less than or equal to the temperature threshold of the compartment, if the temperature of the second compressor is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced; wherein, the second temperature threshold is greater than the first temperature threshold.

[0071] In an alternative embodiment, the controller is further configured to:

[0072] When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0073] It is understood that before the refrigerator enters the stable operating state, the second compartment temperature detected by the compartment temperature detection device and the second compressor temperature detected by the compressor temperature detection device can be continuously or periodically acquired. When the second compartment temperature is less than or equal to the compartment temperature threshold and the second compressor temperature is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced. When the second compartment temperature is greater than the compartment temperature threshold, the compressor speed is controlled to be increased.

[0074] For example, see Figure 6 , Figure 6 This is a second workflow diagram of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S21 to S25:

[0075] S21. When the refrigerator is in the initial power-on state, acquire the second compartment temperature detected by the compartment temperature detection device and the second compressor temperature detected by the compressor temperature detection device, and proceed to step S22.

[0076] S22. Determine whether the temperature of the second compartment is less than or equal to the preset compartment temperature threshold. If yes, proceed to step S25; otherwise, proceed to step S23.

[0077] S23. Determine whether the temperature of the second compressor is greater than the preset second temperature threshold. If yes, proceed to step S24; otherwise, return to step S23.

[0078] S24. Control the compressor to reduce its speed.

[0079] S25. Control the compressor to increase its speed.

[0080] For example, see Figure 7 , Figure 7 This is a third flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S31 to S35:

[0081] S31. When the refrigerator is in the defrost recovery period, acquire the second compartment temperature detected by the compartment temperature detection device and the second compressor temperature detected by the compressor temperature detection device, and proceed to step S34.

[0082] S32. Determine whether the temperature of the second compartment is less than or equal to the preset compartment temperature threshold. If yes, proceed to step S35; otherwise, proceed to step S33.

[0083] S33. Determine whether the temperature of the second compressor is greater than the preset second temperature threshold. If yes, proceed to step S34; otherwise, return to step S33.

[0084] S34. Control the compressor to reduce its speed.

[0085] S35. Control the compressor to increase its speed.

[0086] Specifically, during refrigerator operation, the operating state before the refrigerator enters a stable operating state may be the initial power-on state or the defrost recovery period state. When the refrigerator is in the initial power-on state / defrost recovery period state, the compressor needs to run at high speed. At this time, the compressor runs at high speed according to the target speed in the initial power-on mode / defrost recovery mode and enters steps S21~S25 / S31~S35. As the refrigerator stabilizes and enters a stable operating state, the judgment of the compressor temperature becomes more and more stringent, and then steps S11~S15 can be entered.

[0087] Understandably, when a refrigerator is running, the duration of compressor operation can be used to determine whether the refrigerator has entered the initial power-on state, stable operation state, or defrost recovery period state. For example, when the total runtime of the compressor reaches the preset total runtime, the refrigerator is determined to have entered the stable operation state. Of course, there are other methods to determine the refrigerator's operating state, but no specific restrictions are made here.

[0088] In an alternative embodiment, the controller is further configured to:

[0089] In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed;

[0090] During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

[0091] For example, see Figure 8 , Figure 8 This is a fourth flowchart of the controller provided in an embodiment of the present invention, wherein the controller is used to execute steps S41 to S45:

[0092] S41. In response to the start command, proceed to step S42;

[0093] S32. Control the compressor to increase its speed by one level, and proceed to step S43;

[0094] S43. Determine whether the current speed of the compressor has reached the preset target speed. If yes, proceed to step S44; otherwise, proceed to step S45.

[0095] S44. Control the compressor to run at the current speed;

[0096] S45. Determine whether the current compressor temperature is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor. If yes, return to step S42; otherwise, return to step S45.

[0097] It is understandable that in conventional control systems, the instantaneous start / stop of a compressor is usually a direct stop / start without any buffer. In this embodiment of the invention, control is based on compressor temperature, with n temperature thresholds and n corresponding step speeds. When the compressor reaches the corresponding temperature threshold at the current speed, it is allowed to advance to the next step, and then the corresponding temperature threshold is re-evaluated until the target speed is reached. This embodiment of the invention provides a smoother compressor start-up, offering benefits in terms of both lifespan and noise reduction.

[0098] See Figure 9 , Figure 9 This is a schematic diagram of a communication system provided in an embodiment of the present invention. The refrigerator 100 establishes a data connection with the client 200 through a router 300 or a cloud server 400. When the refrigerator 100 and the client 200 communicate through the router 300, the refrigerator 100 and the client 200 are relatively close, allowing the user to view the operation of the refrigerator or the food storage status from the living room or bedroom. When the refrigerator 100 and the client 200 communicate through the cloud server 400, the refrigerator 100 and the client 200 are relatively far apart, allowing the user to interact with the refrigerator 100 via an app installed on the client 200, and also enabling remote control of the refrigerator 100.

[0099] See Figure 10 , Figure 10 This is a flowchart of a noise reduction control method for a refrigerator provided in an embodiment of the present invention. The refrigerator includes at least: a compressor temperature detection device disposed on the refrigerator compressor and a compartment temperature detection device disposed in the refrigerator compartment. The noise reduction control method for the refrigerator includes:

[0100] S1. When the refrigerator is in a stable operating state, acquire the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device.

[0101] S2. When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced.

[0102] It should be noted that refrigerator operating states can be categorized into several types, such as initial power-on state, stable operation state, and defrost recovery period state. Stable operation state refers to the state when the refrigerator's power or temperature is stable, while the defrost recovery period state refers to the state from the end of defrosting until normal cooling resumes.

[0103] Generally, in user mode, the refrigerator is in a cold compartment state. Therefore, the refrigerator enters a stable operating state as soon as the compressor starts. At this time, the compressor is controlled to run at the target speed set in user mode, and the compressor temperature is checked to see if it exceeds the first temperature threshold, provided that the compartment temperature is satisfied. In first power-on mode, the refrigerator is in a hot compartment state, so the compressor needs to run at a high speed at the beginning. This is the first power-on state. After the refrigerator stabilizes and enters a stable operating state, the compressor temperature is checked to see if it exceeds the first temperature threshold again, provided that the compartment temperature is satisfied. In defrost recovery mode, the compressor speed is also high. This is the defrost recovery period state. After the refrigerator stabilizes and enters a stable operating state, the compressor temperature is checked to see if it exceeds the first temperature threshold again, provided that the compartment temperature is satisfied.

[0104] Specifically, when the refrigerator is in a stable operating state, the first compartment temperature currently detected by the compartment temperature detection device and the first compressor temperature currently detected by the compressor temperature detection device are acquired. To ensure the refrigerator's cooling function, if the first compartment temperature is less than or equal to a preset compartment temperature threshold, it is determined whether the first compressor temperature is greater than the preset first temperature threshold. If so, it indicates that the compressor temperature is too high, which will affect the muffler's noise reduction effect. Therefore, the compressor speed is controlled to reduce the compressor temperature, allowing the muffler to work at its optimal level. At the same time, as the compressor speed decreases, the noise generated by the compressor during operation will also decrease, further improving the noise reduction effect. Moreover, an excessively high compressor temperature also indicates that the refrigerator's energy consumption is too high. Reducing the compressor speed at this time can also ensure that the refrigerator's energy consumption is optimized and can also prevent the compressor from operating at a high level continuously, which would affect its service life.

[0105] Preferably, the noise reduction control method for the refrigerator further includes:

[0106] When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0107] It is understood that when the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device can be continuously or periodically acquired. When the first compartment temperature is less than or equal to a preset compartment temperature threshold and the first compressor temperature is greater than the preset first temperature threshold, the compressor speed is controlled to be reduced. When the first compartment temperature is greater than the compartment temperature threshold, the compressor speed is controlled to be increased.

[0108] Preferably, before the refrigerator enters the stable operating state, the noise reduction control method for the refrigerator further includes:

[0109] The temperature of the second compartment detected by the compartment temperature detection device and the temperature of the second compressor detected by the compressor temperature detection device are obtained;

[0110] When the temperature of the second compartment is less than or equal to the temperature threshold of the compartment, if the temperature of the second compressor is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced; wherein, the second temperature threshold is greater than the first temperature threshold.

[0111] Specifically, during refrigerator operation, the operating state before the refrigerator enters a stable operating state may be the initial power-on state or the defrost recovery period state. When the refrigerator is in the initial power-on state / defrost recovery period state, the compressor needs to run at high speed. At this time, the compressor runs at high speed according to the target speed in the initial power-on mode / defrost recovery mode, and judges whether the compressor temperature is greater than the second temperature threshold when the compartment temperature is satisfied. As the refrigerator stabilizes, the judgment of compressor temperature becomes more and more stringent. It should be judged whether the compressor temperature is greater than the first temperature threshold when the compartment temperature is satisfied.

[0112] Understandably, when a refrigerator is running, the duration of compressor operation can be used to determine whether the refrigerator has entered the initial power-on state, stable operation state, or defrost recovery period state. For example, when the total runtime of the compressor reaches the preset total runtime, the refrigerator is determined to have entered the stable operation state. Of course, there are other methods to determine the refrigerator's operating state, but no specific restrictions are made here.

[0113] Preferably, the noise reduction control method for the refrigerator further includes:

[0114] When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

[0115] It is understood that before the refrigerator enters the stable operating state, the second compartment temperature detected by the compartment temperature detection device and the second compressor temperature detected by the compressor temperature detection device can be continuously or periodically acquired. When the second compartment temperature is less than or equal to the compartment temperature threshold and the second compressor temperature is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced. When the second compartment temperature is greater than the compartment temperature threshold, the compressor speed is controlled to be increased.

[0116] Preferably, the noise reduction control method for the refrigerator further includes:

[0117] In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed;

[0118] During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

[0119] It is understandable that in conventional control systems, the instantaneous start / stop of a compressor is usually a direct stop / start without any buffer. In this embodiment of the invention, control is based on compressor temperature, with n temperature thresholds and n corresponding step speeds. When the compressor reaches the corresponding temperature threshold at the current speed, it is allowed to advance to the next step, and then the corresponding temperature threshold is re-evaluated until the target speed is reached. This embodiment of the invention provides a smoother compressor start-up, offering benefits in terms of both lifespan and noise reduction.

[0120] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator characterized by comprising: include: The housing contains a compressor and a compartment. A compressor temperature detection device is installed on the compressor for detecting the temperature of the compressor; A room temperature detection device is installed inside the room to detect the temperature of the room; Controller, used for: When the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device are obtained. When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced. The controller is also used for: In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed; During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

2. The refrigerator according to claim 1, wherein, The controller is also used for: When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

3. The refrigerator as described in claim 1, characterized in that, Before the refrigerator enters the stable operating state, the controller is also used to: The temperature of the second compartment detected by the compartment temperature detection device and the temperature of the second compressor detected by the compressor temperature detection device are obtained; When the temperature of the second compartment is less than or equal to the temperature threshold of the compartment, if the temperature of the second compressor is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced; wherein the second temperature threshold is greater than the first temperature threshold.

4. The refrigerator as described in claim 3, characterized in that, The controller is also used for: When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

5. A noise reduction control method for a refrigerator, characterized in that, The refrigerator includes at least: a compressor temperature detection device disposed on the refrigerator compressor and a compartment temperature detection device disposed in the refrigerator compartment; therefore, the noise reduction control method of the refrigerator includes: When the refrigerator is in a stable operating state, the first compartment temperature detected by the compartment temperature detection device and the first compressor temperature detected by the compressor temperature detection device are obtained. When the temperature of the first compartment is less than or equal to a preset compartment temperature threshold, if the temperature of the first compressor is greater than a preset first temperature threshold, the compressor speed is controlled to be reduced. The noise reduction control method for the refrigerator also includes: In response to a start command, the compressor speed is controlled to increase in stages to a preset target speed, so that the compressor operates at the target speed; During the process of controlling the compressor to increase its speed in a stepwise manner, if the compressor temperature detected by the compressor temperature detection device is greater than or equal to a preset temperature threshold corresponding to the current speed of the compressor, the compressor speed is controlled to increase.

6. The noise reduction control method for a refrigerator as described in claim 5, characterized in that, The noise reduction control method for the refrigerator also includes: When the temperature of the first compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

7. The noise reduction control method for a refrigerator as described in claim 5, characterized in that, Before the refrigerator enters the stable operating state, the noise reduction control method for the refrigerator further includes: The temperature of the second compartment detected by the compartment temperature detection device and the temperature of the second compressor detected by the compressor temperature detection device are obtained; When the temperature of the second compartment is less than or equal to the temperature threshold of the compartment, if the temperature of the second compressor is greater than the preset second temperature threshold, the compressor speed is controlled to be reduced; wherein the second temperature threshold is greater than the first temperature threshold.

8. The noise reduction control method for a refrigerator as described in claim 7, characterized in that, The noise reduction control method for the refrigerator also includes: When the temperature of the second compartment is greater than the temperature threshold of the compartment, the compressor speed is increased.

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