Refrigerator

Abstract

The refrigerator comprises a refrigerator body, a refrigerant circulation system, a fan, a temperature sensor, a noise sensor and a controller, and the controller is configured to determine a first compressor rotating speed value and a first fan rotating speed value according to a first temperature difference between an environment temperature value and a target set temperature value of a storage chamber in a stable operation mode; the smaller the first temperature difference is, the smaller the rotating speed value of the first compressor is; the first compressor rotating speed value is adjusted according to the current environment noise value to obtain a second compressor rotating speed value, and the second compressor rotating speed value is adjusted according to the first variable quantity of the environment temperature value within the speculated stable operation time to obtain a third compressor rotating speed value; and the compressor is controlled to operate at the third compressor rotating speed value, and the fan is controlled to operate at the second fan rotating speed value lower than or equal to the rotating speed gear corresponding to the first fan rotating speed value. According to the refrigerator, the refrigeration performance and the whole machine operation noise can be considered at the same time, and the comfort of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly to a refrigerator. Background Art

[0002] During the operation of existing refrigerators, the compressor and the fan cannot adaptively adjust their speeds according to changes in the ambient temperature and ambient noise, resulting in a relatively high noise of the whole machine under some operating conditions, making it difficult to balance the refrigeration performance and the operating noise of the whole machine, thus affecting the actual use experience and comfort of users. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a refrigerator that can achieve adaptive adjustment of the compressor speed and the fan speed based on changes in environmental conditions, reduce the overall operating noise of the refrigerator in the stable operation mode while ensuring the refrigeration demand, and improve the comfort of users during actual use.

[0004] To achieve the above object, the refrigerator according to the first aspect embodiment of the present invention includes: a box body, the box body is at least configured with at least one storage compartment; a refrigerant circulation system, the refrigerant circulation system includes a compressor, a condenser, a throttling device and an evaporator, and is used to realize refrigerant circulation and heat exchange between the outside and the storage compartment; a fan for promoting the circulation of heat exchange air; a temperature sensor disposed on the box body for collecting the compartment temperature value and the ambient temperature value of the storage compartment; a noise sensor disposed on the box body for detecting the ambient noise value; a controller, the controller is connected to the temperature sensor and the noise sensor, and the controller is configured to: in the stable operation mode, determine the first compressor speed value of the compressor and the first fan speed value of the fan according to the first temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, control the compressor to operate at the first compressor speed value and control the fan to operate at the first fan speed value, the smaller the first temperature difference, the smaller the first compressor speed value; adjust the first compressor speed value according to the current ambient noise value to obtain a second compressor speed value, and adjust the second compressor speed value according to the first change amount of the ambient temperature value during the speculated stable operation time to obtain a third compressor speed value; control the compressor to operate at the third compressor speed value and control the fan to operate at the second fan speed value, and the fan speed gear corresponding to the second fan speed value is lower than or equal to the fan speed gear corresponding to the first fan speed value.

[0005] The refrigerator according to the embodiment of the present invention obtains the compartment temperature value, the ambient temperature value and the ambient noise value of the storage compartment by setting a temperature sensor and a noise sensor respectively. The controller performs multi-stage dynamic adjustment on the rotation speeds of the compressor and the fan based on these parameters in the stable operation mode. First, the first compressor rotation speed value of the compressor and the first fan rotation speed value of the fan are determined according to the first temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, so as to meet the basic refrigeration demand. Then, the first compressor rotation speed value is further adjusted in combination with the current ambient noise value to obtain the second compressor rotation speed value, so as to minimize the operation noise of the refrigerator in a low-noise environment. Then, by evaluating the change amount of the ambient temperature value within the stable operation time, the second compressor rotation speed value is finely adjusted to obtain the third compressor rotation speed value, so as to cope with the changes in refrigeration demand and noise reduction demand caused by temperature fluctuations. In addition, the controller also adjusts the rotation speed gear of the fan to a rotation speed gear lower than or equal to the rotation speed gear corresponding to the first fan rotation speed value to suppress the noise generated by the operation of the fan. Through the above multi-parameter and multi-stage adjustment strategy, the refrigerator of the present invention can achieve the adaptive adjustment of the compressor rotation speed and the fan rotation speed based on the changes in environmental conditions, reduce the overall operation noise of the refrigerator in the stable operation mode while ensuring the refrigeration demand, and improve the comfort of the user during the actual use process.

[0006] In some embodiments, when obtaining the second compressor rotation speed value, the controller is configured to: obtain the average value of the ambient noise within the first preset duration. When the noise difference is greater than or equal to the first noise difference threshold, the second compressor rotation speed value is the rotation speed value after the first compressor rotation speed value is increased by the first preset rotation speed amplitude, where the noise difference is the difference between the average value of the ambient noise and the noise threshold; when the noise difference is greater than the second noise difference threshold and less than the first noise difference threshold, the second compressor rotation speed value is the first compressor rotation speed value; when the noise difference is less than or equal to the second noise difference threshold, the second compressor rotation speed value is the rotation speed value after the first compressor rotation speed value is decreased by the first preset rotation speed amplitude.

[0007] The above technical solution has the following advantages or beneficial effects: By comparing the size of the noise difference and the first noise difference threshold, the rotation speed of the compressor is adaptively adjusted, which can achieve improving the rotation speed to enhance the refrigeration efficiency in the background of a relatively large ambient noise. In the background of a relatively small ambient noise, the rotation speed is reduced to improve the comfort of the user.

[0008] In some embodiments, when obtaining the third compressor speed value, the controller is configured to: obtain a reference temperature corresponding to the speculated stable operation time on the target ambient temperature change curve, and a first change amount of the ambient temperature value during the speculated stable operation time is a second temperature difference between the ambient temperature value and the reference temperature during the speculated stable operation time; when the second temperature difference exceeds a first temperature difference threshold and the ambient temperature value is lower than the corresponding reference temperature, the third compressor speed value is a speed value obtained by reducing the second compressor speed value by a second preset speed amplitude; when the second temperature difference exceeds the first temperature difference threshold and the ambient temperature value is higher than the corresponding reference temperature, the third compressor speed value is a speed value obtained by increasing the second compressor speed value by the second preset speed amplitude.

[0009] The above technical solution has the following advantages or beneficial effects: By considering the daily ambient temperature change, the speeds of the compressor and the fan in the stable operation mode are adaptively fine-tuned. This fine-tuning mechanism can provide a fast and delicate response when the ambient temperature changes rapidly in a short time, making the system control more stable, further improving the refrigeration efficiency of the compressor and reducing energy consumption.

[0010] In some embodiments, the controller is further configured to: after the compressor operates at the third compressor speed value for a second preset duration and the chamber temperature value of the storage chamber does not reach the target set temperature value, increase the speed of the compressor.

[0011] The above technical solution has the following advantages or beneficial effects: By increasing the speed of the compressor, the refrigeration demand can be quickly met.

[0012] In some embodiments, the controller is further configured to: in the defrosting stage, in response to a defrosting preparation instruction, obtain the total defrosting duration, and perform defrosting cycle operation in a target time period where the noise value in the target noise fitting curve is higher than a first noise threshold and the temperature value in the target temperature fitting curve is lower than a first temperature threshold according to the total defrosting duration; or, when there is no such target time period, perform defrosting cycle operation in a time period where the noise value in the target noise fitting curve is higher than the first noise threshold.

[0013] The above technical solution has the following advantages or beneficial effects: By selecting a target time period where the noise value in the target noise fitting curve is higher than the first noise threshold and the temperature value in the target temperature fitting curve is lower than the first temperature threshold for defrosting cycle operation, the noise generated during the defrosting stage is not easily noticed by the user, and the lower ambient temperature can reduce the amplitude of the chamber temperature rise after defrosting, resulting in better freshness preservation effect.

[0014] In some embodiments, the defrosting stage includes a defrosting cycle and a defrosting recovery period after the end of the defrosting cycle. The second blower speed value corresponds to the low speed gear of the blower. The controller is further configured to: during the defrosting recovery period, determine a fourth compressor speed value of the compressor according to a third temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, control the compressor to operate at the fourth compressor speed value, the smaller the third temperature difference, the smaller the fourth compressor speed value, and control the blower to operate at a third blower speed value, the third blower speed value corresponding to the high speed gear of the blower; when the compressor and the blower are operating, adjust the fourth compressor speed value according to the current ambient noise value to obtain a fifth compressor speed value, and adjust the fifth compressor speed value according to a second change amount of the ambient temperature value during the speculated defrosting recovery period to obtain a sixth compressor speed value; control the compressor to operate at the sixth compressor speed value.

[0015] The above technical solution has the following advantages or beneficial effects: By comprehensively considering parameters such as the third temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, the ambient noise value, the daily ambient temperature change, and the daily ambient noise change, the rotation speeds of the compressor and the blower during the defrosting recovery period are adaptively adjusted. While ensuring the refrigeration demand, the overall operating noise of the refrigerator in the stable operation mode is reduced, and the comfort of the user during actual use is improved.

[0016] In some embodiments, the controller is further configured to: in the high load mode, determine a seventh compressor speed value of the compressor according to a fourth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, wherein when the fourth temperature difference does not meet the high load temperature threshold condition, the seventh compressor speed value is a first speed after reducing the current speed by a third preset speed amplitude, and when the fourth temperature difference meets the high load temperature threshold condition, the seventh compressor speed value is a second speed, the second speed being higher than the first speed; control the compressor to operate at the seventh compressor speed value and control the blower to operate at a third blower speed value, the third blower speed value corresponding to the high speed gear of the blower.

[0017] The above technical solution has the following advantages or beneficial effects: By considering the fourth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment to adaptively adjust the rotation speeds of the compressor and the blower in the high load mode, the refrigeration demand of the refrigerator can be quickly met, and the refrigeration performance of the user during actual use is improved.

[0018] In some embodiments, the controller is further configured to: during the first power-on stage, control the rotational speed of the compressor according to a fifth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, where the smaller the fifth temperature difference, the lower the rotational speed of the compressor; and, when the fifth temperature difference exceeds a gear conversion temperature threshold, control the rotational speed of the blower to convert from a low rotational speed gear to a high rotational speed gear.

[0019] The above technical solution has the following advantages or beneficial effects: By considering the fifth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment to adaptively adjust the rotational speeds of the compressor and the blower during the first power-on stage, while ensuring the refrigeration demand, the overall operating noise of the refrigerator in the stable operation mode is reduced, improving the comfort of the user during actual use.

[0020] In some embodiments, the controller is further configured to: after the compressor and the blower have operated for a third preset duration and the compartment temperature value of the storage compartment has not reached the target set temperature value, increase the rotational speed of the compressor and control the blower to operate at the high rotational speed gear.

[0021] The above technical solution has the following advantages or beneficial effects: By increasing the rotational speed of the compressor, the refrigeration demand can be quickly met.

[0022] In some embodiments, the controller is further configured to: calibrate the temperature sensor and the noise sensor, where, when calibrating the noise sensor, obtain a first noise average value of the ambient noise detected by the noise sensor within a preset time, remove the transient noise values in the first noise average value that exceed a preset noise value, obtain an average value of the first noise average value after removing the transient noise values as a second noise average value, and perform calibration based on the second noise average value and a set initial ambient noise value.

[0023] The above technical solution has the following advantages or beneficial effects: The purpose of calibrating the noise sensor is to eliminate the influence of sudden and abnormal noises in the environment on the compressor rotational speed adjustment strategy.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where: Figure 1 is a block diagram of a refrigerator according to an embodiment of the present invention; Figure 2is a block diagram of a controller according to an embodiment of the present invention; Figure 3 is a flowchart of a control method for a refrigerator according to an embodiment of the present invention.

[0026] Reference numerals: Refrigerator 100; Cabinet 1; refrigerant circulation system 2; blower 3; controller 4; temperature sensor 5; noise sensor 6; Compressor 21; condenser 22; throttling device 23; evaporator 24; processor 41; memory 42. Detailed implementation manners

[0027] Embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention will be described in detail below.

[0028] Reference will be made below to Figure 1 - Figure 2 describe a refrigerator according to an embodiment of the present invention.

[0029] Figure 1 is a block diagram of a refrigerator according to an embodiment of the present invention, as Figure 1 shown, the refrigerator 100 includes: a cabinet 1, a refrigerant circulation system 2, a blower 3, a temperature sensor 5, a noise sensor 6, and a controller 4.

[0030] In some embodiments, the cabinet 1 is the main structure of the refrigerator 100. It serves as a mounting carrier for other components and at the same time plays a role in isolating the external environment and protecting the internal components, enabling the entire refrigerator 100 to operate stably.

[0031] In some embodiments, the material of the cabinet 1 can be selected from high-strength plastics, metals, or composite materials. These materials can provide excellent mechanical strength and meet performance requirements such as heat insulation. For example, high-strength plastics have the characteristics of light weight and corrosion resistance, metal materials provide higher structural stability, and composite materials can balance light weight and versatility. Through reasonable material selection, the cabinet 1 can provide long-term durability and adapt to the actual use environment of the refrigerator 100.

[0032] In some embodiments, the cabinet 1 is at least configured with at least one storage compartment. At least one storage compartment may refer to that the refrigerator 100 has at least one compartment that can store items, such as: a refrigerating compartment, a freezing compartment, a variable-temperature compartment, etc.

[0033] In some embodiments, at least one storage compartment may be one storage compartment, two storage compartments, three storage compartments, five storage compartments, or other numbers of storage compartments. The number of storage compartments can be set according to the functional requirements, design goals, and user preferences of the refrigerator 100, and no specific limitation is made here.

[0034] In some embodiments, the refrigerant circulation system 2 includes a compressor 21, a condenser 22, a throttling device 23, and an evaporator 24, which are used to achieve refrigerant circulation and heat exchange between the outside and the storage compartment.

[0035] Specifically, the compressor 21 can suck in the low-pressure and low-temperature gaseous refrigerant, and then compress it into a high-pressure and high-temperature gaseous refrigerant through compression. Then, the high-pressure and high-temperature gaseous refrigerant is discharged by the compressor 21 and enters the condenser 22. Heat exchange occurs with the outside in the condenser 22 to dissipate heat, and it condenses into a high-pressure and low-temperature liquid refrigerant.

[0036] Furthermore, the liquid refrigerant in the condenser 22 flows through the throttling device 23. During the throttling process, due to the throttling effect, the pressure of the refrigerant rapidly decreases, and then it turns into a low-temperature and low-pressure liquid refrigerant. Then, the refrigerant enters the evaporator 24, absorbs the heat inside the refrigerator in the evaporator 24. As the refrigerant absorbs heat, it gradually evaporates and finally completely turns into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant will re-enter the compressor 21 through the return pipe to start the next cycle. Through this complete cycle process, the refrigerant circuit realizes the continuous transfer of heat inside the refrigerator and the maintenance of temperature, thereby ensuring that the refrigerator 100 has efficient and stable refrigeration performance.

[0037] In some embodiments, the compressor 21 is one of the core components of the refrigerant circulation system 2, responsible for compressing the low-pressure and low-temperature refrigerant into a high-pressure and high-temperature gas, providing power for the refrigerant circulation. The compressor 21 can be different types of compressors 21 such as a piston compressor, a scroll compressor, a centrifugal compressor, or a screw compressor. The specific type of the compressor 21 can be selected according to the specific requirements and application scenarios of the refrigerator 100, and no specific limitation is made here.

[0038] In some embodiments, the condenser 22 can be a heat exchange device in the refrigerant circulation system 2, and its main function is to cool the high-temperature and high-pressure gas discharged by the compressor 21 and condense it into a liquid, thereby releasing heat. The condenser 22 can be different types of condensers 22 such as a finned condenser, a plate condenser, or a shell-and-tube condenser. The specific type of the condenser 22 can be selected according to the specific requirements and application scenarios of the refrigerator 100, and no specific limitation is made here.

[0039] In some embodiments, the evaporator 24 is another heat exchange device in the refrigerator 100. Its main function is to allow the low-temperature and low-pressure liquid refrigerant to absorb heat and evaporate, further absorbing the heat inside the refrigerator 100, thereby achieving the refrigeration effect. The evaporator 24 can be different types of evaporators 24, such as a finned evaporator, a plate evaporator, or a shell-and-tube evaporator. The specific type of the evaporator 24 can be selected according to the specific design requirements of the refrigerator 100, and no specific limitation is made here.

[0040] In some embodiments, the throttling device 23 can be a device for controlling the refrigerant flow rate, and the refrigerant pressure is adjusted by changing the cross-sectional area of the fluid passage. The throttling device 23 can adopt various forms, including but not limited to an electric expansion valve, a thermal expansion valve, a manual expansion valve, etc. The specific type of the throttling device 23 can be selected according to the specific design requirements of the refrigerator 100, and no specific limitation is made here.

[0041] In some embodiments, the main function of the blower 3 is to push the cold air to flow inside the refrigerator, ensuring that the cold air is evenly distributed to all corners of the storage compartment to promote the heat exchange air circulation, thereby improving the refrigeration efficiency. In the condenser 22, the blower 3 helps to improve the heat exchange efficiency. It discharges the hot air around the condenser 22, enabling the condenser 22 to more effectively cool the refrigerant and convert it into a liquid state. In addition, to a certain extent, the blower 3 can also help prevent the accumulation of frost by enhancing the air flow to reduce the moisture aggregation, thereby slowing down the frosting phenomenon inside the refrigerator.

[0042] In some embodiments, the temperature sensor 5 is disposed on the cabinet 1 for collecting the compartment temperature value and the ambient temperature value of the storage compartment.

[0043] In some embodiments, the noise sensor 6 is disposed on the cabinet 1 for detecting the ambient noise value In some embodiments, the controller 4 is connected to the temperature sensor 5 and the noise sensor 6. The controller 4 is configured to: in the stable operation mode, determine the first compressor speed value of the compressor 21 and the first blower speed value of the blower 3 according to the first temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, control the compressor 21 to operate at the first compressor speed value and control the blower 3 to operate at the first blower speed value. The smaller the first temperature difference, the smaller the first compressor speed value.

[0044] Among them, the stable operation mode may refer to a daily temperature control operation mode in which the refrigerator 100 is in a stage other than the first startup, defrosting stage, and special operation states such as rapid freezing / quick cooling / forced operation, with the temperature control tending to be stable, the compressor 21 having been started and operating at a constant working rhythm. Its characteristics are as follows: the actual temperature value of the storage compartment is close to the target set temperature value of the storage compartment (for example, the deviation is within ±1.5 °C); the compressor 21 has been running for a certain period of time (for example, the running time is greater than 5 minutes); the user has not actively operated to change the working mode (such as opening the door, manually setting the temperature change, etc.). Therefore, the stable operation mode represents a normal operation state with stable temperature control and the compressor 21 entering a regular working rhythm.

[0045] In some embodiments, in this stable operation mode, the first compressor speed value of the compressor 21 and the first fan speed value of the fan 3 can be determined according to the mapping relationship between the preset temperature difference range and speed adjustment shown in Table 1.

[0046] Table 1 Mapping relationship table between temperature difference range and compressor / fan speed adjustment in stable operation mode

[0047] As shown in Table 1, the external temperature is the ambient temperature value, the internal temperature is the target set temperature value of the storage compartment set by the user (such as the target set temperature value of the refrigerating compartment) rather than the actual internal temperature. The temperature difference range includes below 5 °C, 5 °C - 10 °C, 10 °C - 15 °C, 15 °C - 20 °C, and above 20 °C. The speed adjustment unit d is a preset constant, and "-" indicates a decrease in speed. By judging which temperature difference range the first temperature difference is in, the compressor speed adjustment and fan speed adjustment are determined.

[0048] For example, when the first temperature difference is above 20°C, the first compressor speed value of the compressor 21 can be the set speed. For example, the set speed can be 1000 RPM (Revolutions Per Minute), and the fan speed gear corresponding to the first fan speed value of the fan 3 is the high-speed gear; when the first temperature difference is in the range of 15°C - 20°C, the first compressor speed value of the compressor 21 can be the set speed - d. Assuming d is 100 RPM, the first compressor speed value is 1000 RPM - 100 RPM, which is equal to 900 RPM, and the fan speed gear corresponding to the first fan speed value of the fan 3 is the high-speed gear; when the first temperature difference is in the range of 10°C - 15°C, the first compressor speed value of the compressor 21 can be the set speed - 2d, that is, 1000 RPM - 2×100 RPM, which is equal to 800 RPM, and the fan speed gear corresponding to the first fan speed value of the fan 3 is the high-speed gear; when the first temperature difference is in the range of 5°C - 10°C, the first compressor speed value of the compressor 21 can be the set speed - 3d, that is, 1000 RPM - 3×100 RPM, which is equal to 700 RPM, and the fan speed gear corresponding to the first fan speed value of the fan 3 is the low-speed gear; when the first temperature difference is below 5°C, the first compressor speed value of the compressor 21 can be the set speed - 4d, that is, 1000 RPM - 4×100 RPM, which is equal to 600 RPM, and the fan speed gear corresponding to the first fan speed value of the fan 3 is the low-speed gear.

[0049] Therefore, the smaller the first temperature difference, the smaller the first compressor speed value; the larger the first temperature difference, the larger the first compressor speed value. When the ambient temperature value is relatively high and the first temperature difference from the target set temperature value of the storage compartment is relatively large, the speed of the compressor 21 is adaptively increased, and the fan 3 is operated at the high-speed gear, which can meet the refrigeration requirements of the refrigerator 100 and improve the refrigeration capacity. When the ambient temperature value is relatively low and the first temperature difference from the target set temperature value of the storage compartment is relatively low, the speed of the compressor 21 is adaptively decreased, and the fan 3 is operated at the low-speed gear, which can reduce energy consumption and suppress the running noise.

[0050] In some embodiments, after determining the first compressor speed value of the compressor 21 and the first fan speed value of the fan 3 according to the first temperature difference, the controller 4 is further configured to adjust the first compressor speed value according to the current ambient noise value to obtain a second compressor speed value. The purpose of this adjustment is to introduce the current ambient noise value as a reference factor to dynamically optimize the compressor operation state on the premise of meeting the refrigeration requirements, so that the refrigerator 100 can take into account both the refrigeration performance and the overall running noise of the machine, thereby improving the user's comfort.

[0051] Moreover, the rotational speed value of the second compressor is adjusted according to the first change amount of the ambient temperature value during the speculated stable operation time to obtain the rotational speed value of the third compressor. Among them, adjusting the rotational speed of the compressor based on the change amount of the ambient temperature value is a fine-tuning. This fine-tuning mechanism takes into account the short-term change trend of the ambient temperature, making the system control more stable, further improving the refrigeration efficiency of the compressor 21 and reducing energy consumption.

[0052] In some embodiments, the controller 4 is further configured to: control the compressor 21 to operate at the rotational speed value of the third compressor and control the fan 3 to operate at the rotational speed value of the second fan. The fan speed gear corresponding to the rotational speed value of the second fan 3 is lower than or equal to the fan speed gear corresponding to the rotational speed value of the first fan. That is to say, in the stable operation mode, the fan 3 finally operates at the rotational speed value of the second fan in the low fan speed gear. This is because after multiple stages of adjustment such as temperature difference adjustment, ambient noise factor correction, and fine-tuning of the ambient temperature change amount of the compressor 21, it has been able to meet the current refrigeration demand. At this time, there is no longer a need for the fan 3 to assist in heat dissipation at a high speed. By reducing the fan speed, it not only helps to further reduce the overall machine operation noise but also reduces power consumption, thereby improving the user experience.

[0053] In some embodiments, as Figure 2 shown, the controller 4 may include a processor 41 and a memory 42. Among them, the processor 41 may be a central processing unit (CPU, Central Processing Unit), a microcontroller unit (MCU, Microcontroller Unit), a digital signal processor (DSP, Digital Signal Processor), a graphics processing unit (GPU, Graphics Processing Unit), a field-programmable gate array (FPGA, Field-Programmable Gate Array), or an application-specific integrated circuit (ASIC, Application-Specific Integrated Circuit), etc., for performing compressor speed and fan speed regulation In some embodiments, the memory 42 may be a random access memory (RAM), a read-only memory (ROM), a flash memory (Flash), or a non-volatile random access memory (NVRAM), for storing control logic programs, the compartment temperature values of the storage compartments, ambient temperature values, ambient noise values, etc.

[0054] The refrigerator 100 according to an embodiment of the present invention obtains the compartment temperature value, the ambient temperature value, and the ambient noise value of the storage compartment by setting a temperature sensor 5 and a noise sensor 6 respectively. The controller 4 performs multi-stage dynamic adjustment on the rotational speeds of the compressor 21 and the blower 3 based on these parameters in the stable operation mode. First, a first compressor rotational speed value of the compressor 21 and a first blower rotational speed value of the blower 3 are determined according to a first temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, so as to meet the basic refrigeration requirement. Then, the first compressor rotational speed value is further adjusted in combination with the current ambient noise value to obtain a second compressor rotational speed value, so as to minimize the operating noise of the refrigerator 100 in a low-noise environment. Then, by evaluating the change amount of the ambient temperature value within the stable operation time, the second compressor rotational speed value is finely adjusted to obtain a third compressor rotational speed value, so as to cope with the changes in the refrigeration requirement and the noise reduction requirement caused by temperature fluctuations. In addition, the controller 4 also adjusts the rotational speed gear of the blower 3 to a rotational speed gear lower than or equal to the rotational speed gear corresponding to the first blower rotational speed value to suppress the noise generated by the operation of the blower 3. Through the above multi-parameter and multi-stage adjustment strategy, the refrigerator 100 of the present invention can achieve adaptive adjustment of the compressor rotational speed and the blower rotational speed based on the changes in environmental conditions, reduce the overall operating noise of the refrigerator 100 in the stable operation mode while ensuring the refrigeration requirement, and improve the comfort of the user during actual use.

[0055] In some embodiments, when obtaining the second compressor rotational speed value, the controller 4 is configured to: obtain the average ambient noise value within a first preset duration. When the noise difference is greater than or equal to a first noise difference threshold, the second compressor rotational speed value is the rotational speed value after the first compressor rotational speed value is increased by a first preset rotational speed amplitude, where the noise difference is the difference between the average ambient noise value and the noise threshold; when the noise difference is greater than a second noise difference threshold and less than the first noise difference threshold, the second compressor rotational speed value is the first compressor rotational speed value; when the noise difference is less than or equal to the second noise difference threshold, the second compressor rotational speed value is the rotational speed value after the first compressor rotational speed value is decreased by a first preset rotational speed amplitude.

[0056] The average ambient noise value refers to the average value of multiple ambient noise samples collected within a stable time window (i.e., the first preset duration), and is used to reflect the background noise level of the current environment. For example, the first preset duration can be set to 60 seconds. The controller 4 can collect the ambient noise value once every 1 second, and take the average of 60 sampling values to obtain the average ambient noise value within this period.

[0057] In some embodiments, the noise threshold can be a fixed value of the acceptable ambient noise level set by the system, such as 45 dB (decibel), and is used as a reference standard for adjusting the compressor operation strategy.

[0058] In some embodiments, the first noise difference threshold and the second noise difference threshold may be two preset reference standards for measuring the deviation of the current ambient noise average value from the noise threshold, thereby determining the level of the current ambient noise, and adjusting the compressor speed accordingly. Among them, the first noise difference threshold is greater than the second noise difference threshold. The first noise difference threshold represents the boundary value where the ambient noise average value is significantly greater than the noise threshold, and the second noise difference threshold represents the boundary value where the ambient noise average value is slightly lower than or equal to the noise threshold.

[0059] In some embodiments, the first preset speed amplitude may be a fixed value (such as ±500 RPM), or may be set as a gear-adjustable value (such as increasing or decreasing by one gear).

[0060] Specifically, when the noise difference is greater than or equal to the first noise difference threshold, it indicates that the ambient noise itself is relatively large at this time (such as the operation of a kitchen range hood, daytime traffic noise, etc.), and it is not easy for the user to perceive the running noise of the refrigerator 100. Therefore, the quietness can be sacrificed appropriately to improve the refrigeration efficiency. That is, the first compressor speed value of the compressor 21 is increased by the first preset speed amplitude (such as increasing by one gear) to reach the second compressor speed value. When the noise difference is greater than the second noise difference threshold and less than the first noise difference threshold, it indicates that the ambient noise is moderate at this time, and it is reasonable to maintain the current compressor operation strategy. Therefore, the compressor 21 continues to operate at the first compressor speed value. When the noise difference is less than or equal to the second noise difference threshold, it indicates that the ambient noise itself is relatively small at this time (such as at night), and the user is more likely to perceive the running noise of the refrigerator 100. Therefore, the speed can be reduced to improve the user's comfort. That is, the first compressor speed value of the compressor 21 is decreased by the first preset speed amplitude (such as decreasing by one gear) to reach the second compressor speed value.

[0061] In some embodiments, when the controller 4 obtains the third compressor speed value, it is configured to: obtain the reference temperature corresponding to the speculated stable operation time on the target ambient temperature change curve, and the first change amount of the ambient temperature value during the speculated stable operation time is the second temperature difference between the ambient temperature value and the reference temperature during the speculated stable operation time. When the second temperature difference exceeds the first temperature difference threshold and the ambient temperature value is lower than the corresponding reference temperature, the third compressor speed value is the speed value after the second compressor speed value is decreased by the second preset speed amplitude; when the second temperature difference exceeds the first temperature difference threshold and the ambient temperature value is higher than the corresponding reference temperature, the third compressor speed value is the speed value after the second compressor speed value is increased by the second preset speed amplitude.

[0062] Among them, the target ambient temperature change curve may refer to the temperature change trend of the external environment of the refrigerator (such as the user's home kitchen) within a day. The system uses the temperature sensor 5 built in the refrigerator 100 to regularly collect ambient temperature data, for example, sampling once every 1 minute or 5 minutes, and records the ambient temperature values in the past 24 hours. Subsequently, the system uses algorithms such as sliding window linear fitting, spline interpolation, or cubic polynomial fitting to perform trend modeling on the sampling points, thereby generating a smooth target ambient temperature change curve.

[0063] In some embodiments, the system can also continuously record the ambient temperature change data of each day during long-term operation, and perform cluster analysis on these curves by season or month through machine learning algorithms (such as K-means clustering). For each season or month, the system can extract a representative "typical day" ambient temperature change curve as the target reference curve for that season or month. During operation, the system can automatically match the target ambient temperature change curve of the current season or month according to the current operating date to improve the adaptability to environmental changes.

[0064] In some embodiments, the speculated stable operation time can be automatically speculated by the system according to the current operating state of the compressor 21. For example, the system can detect the time period during which the compressor 21 continuously maintains a stable rotation speed, and consider that the system is in a thermal equilibrium or stable operation state during this period, thereby determining it as the stable operation time.

[0065] In some embodiments, the second preset speed amplitude can be a small step adjustment value (such as ±50 RPM) to achieve fine adjustment of the compressor speed. This fine adjustment mechanism can provide a fast and delicate response when the ambient temperature changes rapidly in a short period of time, making the system control more stable, further improving the refrigeration efficiency of the compressor 21 and reducing energy consumption.

[0066] In some embodiments, when the second temperature difference exceeds the first temperature difference threshold (such as 2°C) and the ambient temperature value is lower than the corresponding reference temperature, it indicates that the first change amount of the ambient temperature value during the speculated stable operation time is relatively large, and the ambient temperature is rapidly decreasing. This may be due to factors such as the indoor air conditioner being turned on, rainfall, or snowfall. At this time, the second compressor speed value of the compressor 21 can be reduced by the second preset speed amplitude (such as ±50 RPM) to reach a smaller third compressor speed value. This can reduce energy consumption and operating noise while ensuring the refrigeration demand.

[0067] When the second temperature difference exceeds the first temperature difference threshold (such as 2°C) and the ambient temperature value is higher than the corresponding reference temperature, it indicates that the first change amount of the ambient temperature value during the speculated stable operation time is large, and the ambient temperature is rising rapidly. This may be due to the enhanced sunlight during the noon period or the heat accumulation after the doors and windows are closed. At this time, the second compressor speed value of the compressor 21 can be increased by a second preset speed amplitude (such as ±50 RPM) to reach a larger third compressor speed value, which can enhance the refrigeration effect and quickly meet the refrigeration demand.

[0068] In some embodiments, the controller 4 is further configured to: when the chamber temperature value of the storage compartment does not reach the target set temperature value after the compressor 21 operates at the third compressor speed value for a second preset duration, increase the speed of the compressor 21.

[0069] Among them, the second preset duration may refer to the time window during which the compressor 21 continuously operates at the third compressor speed value in the stable operation mode. This duration can be set according to the refrigeration demand of the refrigerator 100, such as 10 minutes, 15 minutes, 20 minutes, etc. When the compressor 21 operates at the third compressor speed value for the second preset duration, if the chamber temperature value of the storage compartment does not reach the target set temperature value, the system can consider that the speed of the compressor 21 does not meet the refrigeration demand within the second preset duration. Therefore, the speed of the compressor 21 can be increased (such as increasing the speed by one gear) and continue to operate. At this time, it can also be determined again within a shorter duration less than the second preset duration whether the chamber temperature value of the storage compartment reaches the target set temperature value. If it still does not reach, the speed is increased again, and so on, until the temperature of the storage compartment reaches the target set value, and then the compressor 21 will stop operating.

[0070] In some embodiments, since there is a certain degree of operating noise in the defrosting stage of the refrigerator 100, to improve the user experience, the system can intelligently select and judge the defrosting timing. For this purpose, the controller 4 is further configured to: in the defrosting stage, in response to the defrost preparation instruction, obtain the total defrosting duration, and perform defrosting cycle operation for the target time period in the target noise fitting curve where the noise value is higher than the first noise threshold and the temperature value in the target temperature fitting curve is lower than the first temperature threshold; or, when there is no target time period, perform defrosting cycle operation in the time period where the noise value in the target noise fitting curve is higher than the first noise threshold.

[0071] In some embodiments, the triggering method of the defrost preparation instruction can be automatic triggering (for example, when the ice layer detection sensor of the evaporator 24 detects that the frost thickness reaches the preset threshold, or the cumulative operation time of the compressor reaches the set value) or user manual triggering (the user remotely controls through the App (Application) or actively issues a "defrost preparation" instruction through the refrigerator 100 panel).

[0072] In some embodiments, the total defrosting duration may refer to the duration of a complete defrosting stage, which can be automatically inferred by the system based on the current operating state of the compressor 21.

[0073] In some embodiments, the target temperature fitting curve may refer to the target ambient temperature change curve described in the above embodiments, representing the temperature change trend of the external environment of the refrigerator (such as the user's home kitchen) within a day.

[0074] In some embodiments, the target noise fitting curve may refer to the fitting result curve of the background noise change trend within 24 hours in the user's home environment. The system can perform fitting calculations on the total defrosting duration of the refrigerator 100 based on the specific usage scenarios in the user's home (such as usage frequency, door opening and closing frequency, current ice layer thickness estimation, etc.), so as to generate a smooth target noise fitting curve.

[0075] In some embodiments, the system can fit multiple target noise fitting curves in the user's home according to the ambient noise values on holidays and weekdays. Based on these curves, the quiet intervals and noise intervals in the user's usage environment can be inferred.

[0076] In some embodiments, the first noise threshold can be set by the manufacturer according to industry standards or user research (such as 45 dB), representing the maximum operating noise value that users can tolerate during defrosting. Determine the target time period in the target noise fitting curve where the noise value is higher than the first noise threshold and the temperature value in the target temperature fitting curve is lower than the first temperature threshold according to the total defrosting duration, and perform defrosting cycle operation during this period. The purpose of this is to perform defrosting during periods of high noise and low ambient temperature. The noise generated during the defrosting stage is not easily noticed by users, and the relatively low ambient temperature can reduce the amplitude of the cavity temperature rise after defrosting, resulting in better fresh-keeping effect. When there is no target time period, perform defrosting cycle operation during the time period in the target noise fitting curve where the noise value is higher than the first noise threshold. The purpose of this is to prioritize improving the user's perceptual experience of noise as the first priority for scheduling.

[0077] In some embodiments, the defrosting stage includes a defrosting cycle and a defrosting recovery period after the defrosting cycle ends. The rotational speed value of the second fan 3 corresponds to the low-speed gear of the fan 3. Among them, the defrosting cycle is the process in which the ice layer is actually heated and melted, accompanied by the compressor 21 stopping and the fan running at a low speed to prevent cold air from leaking. The defrosting recovery period may refer to the period after defrosting is completed, when the system restarts refrigeration, and the compressor 21 and the fan 3 resume operation to quickly restore the internal temperature of the refrigerator to the set value. During this period, due to the reflow of the refrigerant and the air supply of the fan 3, relatively large noise and energy consumption will be generated.

[0078] In some embodiments, during the defrosting cycle, the internal temperature of the refrigerator gradually rises. To effectively evaporate the frost layer while avoiding excessive air flow that may cause rapid temperature changes, the fan speed is set to a low speed setting. This ensures that the regulation of air flow by the fan 3 is gentle, preventing violent air flow that could lead to temperature fluctuations in other areas inside the refrigerator. The low speed setting also reduces the noise generated by the fan 3. During the defrosting process, since the system needs to thaw the ice and frost, it may take some time for the system to adjust the temperature. The lower fan speed helps reduce the noise during the defrosting stage, thus optimizing the user experience, especially at night or in situations where a low-noise environment is required.

[0079] In some embodiments, the controller 4 is further configured to: during the defrosting recovery period, determine a fourth compressor speed value of the compressor 21 based on a third temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, control the compressor 21 to operate at the fourth compressor speed value, where the smaller the third temperature difference, the smaller the fourth compressor speed value, and control the fan 3 to operate at a third fan speed value, and the third fan speed value corresponds to the high speed setting of the fan 3.

[0080] In some embodiments, during the defrosting recovery period, the fourth compressor speed value of the compressor 21 and the third fan speed value of the fan 3 can be determined according to the mapping relationship between the preset temperature difference range and the speed adjustment shown in Table 2.

[0081] Table 2 Mapping Relationship Table of Temperature Difference Range and Compressor / Fan Speed Adjustment during Defrosting Recovery Period

[0082] As shown in Table 2, the external temperature is the ambient temperature value, the internal temperature is the target set temperature value (such as the target set temperature value of the refrigerating compartment) set by the user rather than the actual internal temperature, the temperature difference range includes below 5°C, 5°C - 10°C, 10°C - 15°C, 15°C - 20°C, and above 20°C, the speed adjustment unit d is a preset constant, "-" indicates a reduction in speed, and by determining which temperature difference range the third temperature difference is in, the compressor speed adjustment is determined.

[0083] For example, when the third temperature difference is above 20°C, the fourth compressor speed value of the compressor 21 can be the set speed, which is higher than the set speed in the stable operation mode. For example, the set speed can be 1500 RPM; when the third temperature difference is in the range of 15°C - 20°C, the fourth compressor speed value of the compressor 21 can be the set speed - d. Assuming d is 100 RPM, the first compressor speed value is 1500 RPM - 100 RPM, which is equal to 1400 RPM; when the third temperature difference is in the range of 10°C - 15°C, the fourth compressor speed value of the compressor 21 can be the set speed - 2d, that is, 1500 RPM - 2×100 RPM, which is equal to 1300 RPM; when the third temperature difference is in the range of 5°C - 10°C, the fourth compressor speed value of the compressor 21 can be the set speed - 3d, that is, 1500 RPM - 3×100 RPM, which is equal to 1200 RPM; when the third temperature difference is below 5°C, the fourth compressor speed value of the compressor 21 can be the set speed - 4d, that is, 1500 RPM - 4×100 RPM, which is equal to 1100 RPM.

[0084] Therefore, the smaller the third temperature difference, the smaller the fourth compressor speed value; the larger the third temperature difference, the larger the fourth compressor speed value. When the ambient temperature value is high and the third temperature difference from the target set temperature value of the storage compartment is large, the speed of the compressor 21 is adaptively increased, and the fan 3 is operated at a high speed gear, which can meet the refrigeration requirements of the refrigerator 100 and improve the refrigeration capacity. When the ambient temperature value is low and the third temperature difference from the target set temperature value of the storage compartment is low, the speed of the compressor 21 is adaptively decreased, which can reduce energy consumption and suppress the running noise.

[0085] In some embodiments, after determining the fourth compressor speed value of the compressor 21 and the third fan speed value of the fan 3 according to the third temperature difference, the controller 4 is further configured to adjust the fourth compressor speed value to obtain a fifth compressor speed value according to the current ambient noise value when the compressor 21 and the fan 3 are running. The purpose of this adjustment is to introduce the current ambient noise value as a reference factor to dynamically optimize the operation state of the compressor on the premise of meeting the refrigeration requirements, so that the refrigerator 100 can take into account both the refrigeration performance and the overall running noise of the machine, thus improving the user's comfort.

[0086] Moreover, the fifth compressor speed value is adjusted according to the second change amount of the ambient temperature value during the predicted defrost recovery period to obtain a sixth compressor speed value, and the compressor 21 is controlled to run at the sixth compressor speed value. Among them, adjusting the compressor speed based on the change amount of the ambient temperature value is a fine adjustment. This fine adjustment mechanism takes into account the short-term change trend of the ambient temperature, makes the system control more stable, further improves the refrigeration efficiency of the compressor 21 and reduces energy consumption.

[0087] In some embodiments, during the defrost recovery period, the controller 4 is further configured to: when the compartment temperature value of the storage compartment does not reach the target set temperature value after the compressor 21 operates at the sixth compressor speed value for a certain preset duration, increase the speed of the compressor 21. Herein, this preset duration can be set according to the defrost recovery refrigeration requirement of the refrigerator 100, but is different from the second preset duration in the stable operation mode.

[0088] In some embodiments, the controller 4 is further configured to: in the high load mode, determine the seventh compressor speed value of the compressor 21 according to the fourth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment. Wherein, when the fourth temperature difference does not meet the high load temperature threshold condition, the seventh compressor speed value is the first speed after reducing the third preset speed amplitude from the current speed; when the fourth temperature difference meets the high load temperature threshold condition, the seventh compressor speed value is the second speed, and the second speed is higher than the first speed; control the compressor 21 to operate at the seventh compressor speed value and control the blower 3 to operate at the third blower speed value, and the third blower speed value corresponds to the high speed gear of the blower 3.

[0089] In some embodiments, the high load mode can be a refrigerator working mode manually set by the user, such as the quick cooling mode, the quick freezing mode, etc. The high load mode can be triggered through the control panel or the mobile phone APP.

[0090] In some embodiments, in the high load mode, the seventh compressor speed value of the compressor 21 and the third blower speed value of the blower 3 can be determined according to the mapping relationship between the preset temperature difference range and the speed adjustment shown in Table 3.

[0091] Table 3 Mapping relationship table between temperature difference range and compressor / blower speed adjustment in high load mode

[0092] As shown in Table 3, the external temperature is the ambient temperature value, the internal temperature is the target set temperature value of the storage compartment set by the user (such as the target set temperature value of the refrigerating compartment) rather than the actual internal temperature, the temperature difference range includes below 5°C, 5°C - 10°C, 10°C - 15°C, 15°C - 20°C, and above 20°C, the speed adjustment unit d is a preset constant, "-" indicates reducing the speed, the high load temperature threshold condition can be 5°C, and by judging whether the fourth temperature difference is below 5°C, the compressor speed adjustment is determined.

[0093] For example, when the fourth temperature difference exceeds 5°C, the seventh compressor speed value of the compressor 21 can be the set speed (i.e., the second speed), which is different from the set speeds in both the stable operation mode and the defrost recovery cycle. For example, the set speed can be 1600 RPM; when the fourth temperature difference is below 5°C, the seventh compressor speed value of the compressor 21 can be the set speed - 2d (i.e., the first speed). Assuming d is 100 RPM, the seventh compressor speed value is 1600 RPM - 2×100 RPM, which equals 1400 RPM.

[0094] Therefore, only when the fourth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment is very small, that is, when the current ambient temperature value is small, will the speed of the compressor 21 be adaptively reduced to reduce energy consumption and suppress operating noise. Otherwise, it will operate at a higher compressor speed value to achieve rapid refrigeration and meet the user's usage requirements.

[0095] In some embodiments, the controller 4 is further configured to: in the first power-on stage, control the speed of the compressor 21 according to the fifth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment. The smaller the fifth temperature difference, the lower the speed of the compressor 21. And when the fifth temperature difference exceeds the gear conversion temperature threshold, control the speed of the blower 3 to convert from the low-speed gear to the high-speed gear.

[0096] In some embodiments, the first power-on stage may refer to the stage after the refrigerator 100 is re-powered from the power-off state, after the factory acceptance test for the first time, or after the user installs and powers on for the first time, when the controller 4 has not yet established stable operation parameters.

[0097] In some embodiments, in the first power-on stage, the speeds of the compressor 21 and the blower 3 can be determined according to the mapping relationship between the preset temperature difference range and the speed adjustment shown in Table 4.

[0098] Table 4 Mapping relationship table between temperature difference range and compressor / blower speed adjustment in the first power-on stage

[0099] As shown in Table 4, the external temperature is the ambient temperature value, the internal temperature is the target set temperature value of the storage compartment set by the user (such as the target set temperature value of the refrigerating compartment) rather than the actual internal temperature. The temperature difference range includes below 5°C, 5°C - 10°C, 10°C - 15°C, 15°C - 20°C, and above 20°C. The speed adjustment unit d is a preset constant, "-" indicates a reduction in speed, and the gear conversion temperature threshold can be 10°C. By determining which temperature difference range the fifth temperature difference is in, the compressor speed adjustment and the blower speed adjustment can be determined.

[0100] For example, when the fifth temperature difference is above 20°C, the rotational speed of the compressor 21 can be a set rotational speed, which is different from the set rotational speeds in the stable operation mode, defrost recovery period, and high load mode described in the above embodiments. Generally speaking, the set rotational speed in the initial power-on stage is very high to quickly meet the refrigeration demand. For example, the set rotational speed can be 2000 RPM, and the rotational speed of the blower 3 is in the high rotational speed gear; when the fifth temperature difference is in the range of 15°C - 20°C, the rotational speed value of the compressor 21 can be the set rotational speed - d. Assuming d is 100 RPM, the rotational speed of the compressor 21 is 2000 RPM - 100 RPM, which is equal to 1900 RPM, and the rotational speed of the blower 3 is in the high rotational speed gear; when the fifth temperature difference is in the range of 10°C - 15°C, the rotational speed value of the compressor 21 can be the set rotational speed - 2d, that is, 20,00 RPM - 2×100 RPM, which is equal to 1800 RPM, and the rotational speed of the blower 3 is in the high rotational speed gear; when the fifth temperature difference is in the range of 5°C - 10°C, the rotational speed value of the compressor 21 can be the set rotational speed - 3d, that is, 2000 RPM - 3×100 RPM, which is equal to 1700 RPM, and the rotational speed of the blower 3 is in the low rotational speed gear; when the fifth temperature difference is below 5°C, the rotational speed value of the compressor 21 can be the set rotational speed - 4d, that is, 2000 RPM - 4×100 RPM, which is equal to 1600 RPM, and the rotational speed of the blower 3 is in the low rotational speed gear.

[0101] Therefore, the smaller the fifth temperature difference, the lower the rotational speed of the compressor 21; the larger the fifth temperature difference, the higher the rotational speed of the compressor 21. When the ambient temperature value is relatively high and the fifth temperature difference from the target set temperature value of the storage compartment is relatively large, the rotational speed of the compressor 21 can be adaptively increased, and the blower 3 can be made to operate at a high rotational speed gear to meet the refrigeration demand of the refrigerator 100 and improve the refrigeration capacity. When the ambient temperature value is relatively low and the fifth temperature difference from the target set temperature value of the storage compartment is relatively low, the rotational speed of the compressor 21 can be adaptively decreased, and the blower 3 can be made to operate at a low rotational speed gear to reduce energy consumption and suppress operating noise.

[0102] In some embodiments, during the initial power-on stage of the refrigerator 100, the controller 4 is further configured to: after the compressor 21 and the blower 3 continuously operate according to the rotational speed strategy set according to the fifth temperature difference for a third preset duration, if the compartment temperature value of the storage compartment still fails to reach the target set temperature value, the system then considers that the current refrigeration capacity of the compressor is insufficient to meet the refrigeration demand. Therefore, in order to accelerate the refrigeration process and improve the refrigeration efficiency, the compressor 21 can be controlled to operate at the set maximum compressor rotational speed and the blower 3 can be controlled to operate at a high rotational speed gear to quickly reduce the temperature of the storage compartment below the target set temperature value.

[0103] In some embodiments, the controller 4 is further configured to calibrate the temperature sensor 5 and the noise sensor 6. When calibrating the noise sensor 6, the first noise average value of the ambient noise detected by the noise sensor 6 within a preset time is obtained, the transient noise values exceeding the preset noise value in the first noise average value are removed, and the average value of the first noise average value after removing the transient noise values is obtained as the second noise average value, and calibration is performed based on the second noise average value and the set initial ambient noise value.

[0104] In some embodiments, the initial ambient noise value can be a reference noise level preset by the system at the factory or predefined in the design stage, and is used as a normal reference value for measuring the background noise of the environment where the refrigerator 100 operates.

[0105] In some embodiments, the purpose of calibrating the noise sensor 6 is to eliminate the influence of sudden and abnormal noises in the environment on the compressor speed adjustment strategy.

[0106] In some embodiments, the calibration method of the temperature sensor 5 is mutual calibration between multiple sensors. That is to say, by comparing the readings of different sensors, it is judged whether there is any sensor abnormality. If the reading of a certain sensor deviates too much from other sensors, it may mean that the sensor fails or is abnormal, and correction is required to ensure data consistency.

[0107] Figure 3 is a flowchart of a control method for a refrigerator according to an embodiment of the present invention, as Figure 3 shown, the control method of the refrigerator at least includes the following steps: S100, start.

[0108] S101, the refrigerator enters the first power-on stage.

[0109] S102, calibrate the temperature sensor and the noise sensor.

[0110] S103, collect the compartment temperature value and the ambient temperature value of the storage compartment.

[0111] S104, the refrigerator starts refrigeration.

[0112] S105, control the speed of the compressor and the speed of the blower according to the fifth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment.

[0113] S106, determine that after the compressor and the blower have run for a third preset duration, the temperature in the storage compartment has not reached the target set temperature value.

[0114] S107, control the compressor to run at the set maximum compressor speed and control the blower to run at a high speed gear.

[0115] S108. After reaching the target set temperature value, the refrigerator enters the shutdown state.

[0116] S201. The refrigerator enters the stable operation mode.

[0117] S202. Determine the first compressor speed value of the compressor and the first fan speed value of the fan according to the first temperature difference between the ambient temperature value and the target set temperature value of the storage compartment.

[0118] S203. Control the compressor to operate at the first compressor speed value and control the fan to operate at the first fan speed value.

[0119] S204. Adjust the first compressor speed value according to the current ambient noise value to obtain the second compressor speed value.

[0120] S205. Control the compressor to operate at the second compressor speed value.

[0121] S206. Monitor the daily ambient temperature change in the user's home and fit the ambient temperature value to generate a target temperature fitting curve.

[0122] S207. According to the target temperature fitting curve, observe and infer the first change amount of the ambient temperature value during the stable operation time.

[0123] S208. Adjust the second compressor speed value according to the first change amount of the ambient temperature value during the inferred stable operation time to obtain the third compressor speed value.

[0124] S209. Control the compressor to operate at the third compressor speed value and control the fan to operate at the second fan speed value. The second fan speed value corresponds to the low speed gear of the fan.

[0125] S210. During the period when the compressor operates at the third compressor speed value for the second preset duration, monitor the compartment temperature of the storage compartment.

[0126] S211. After determining that the compressor has operated at the third compressor speed value for the second preset duration, the compartment temperature value of the storage compartment has not reached the target set temperature value.

[0127] S212. Increase the speed of the compressor.

[0128] S213. Reduce the second preset duration, monitor the compartment temperature of the storage compartment again. If the compartment temperature value of the storage compartment still has not reached the target set temperature value, then increase the speed of the compressor again. Repeat this process until the compartment temperature value reaches the target set temperature value.

[0129] S214. After reaching the target set temperature value, the refrigerator enters the shutdown state.

[0130] S301. The refrigerator enters the defrosting stage.

[0131] S302. Monitor the change of ambient noise within a single day in the user's home, and fit the ambient noise values to generate a target noise fitting curve.

[0132] S303. Identify that there is a defrosting requirement after a certain moment.

[0133] S304. Determine the defrosting moment according to the target noise fitting curve and the target temperature fitting curve.

[0134] S305. Select a target time period in the target noise fitting curve where the noise value is higher than the first noise threshold and the temperature value in the target temperature fitting curve is lower than the first temperature threshold to perform defrosting cycle operation.

[0135] S306. The refrigerator performs defrosting.

[0136] S307. When the defrosting cycle ends, automatically enter the defrosting recovery period.

[0137] S308. Determine the fourth compressor speed value of the compressor according to the third temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, control the compressor to operate at the fourth compressor speed value, and control the fan to operate at the third fan speed value, where the third fan speed value corresponds to the high speed gear of the fan.

[0138] S309. When the compressor and the fan are operating, adjust the fourth compressor speed value according to the current ambient noise value to obtain the fifth compressor speed value.

[0139] S310. Control the compressor to operate at the fifth compressor speed value.

[0140] S311. According to the target temperature fitting curve, observe and infer the second change amount of the ambient temperature value during the defrosting recovery period.

[0141] S312. Adjust the fifth compressor speed value according to the inferred second change amount of the ambient temperature value during the defrosting recovery period to obtain the sixth compressor speed value.

[0142] S313. Control the compressor to operate at the sixth compressor speed value.

[0143] S314. During the period when the compressor operates at the sixth compressor speed value for a certain preset duration, monitor the compartment temperature of the storage compartment.

[0144] S315. Determine that after the compressor operates at the sixth compressor speed value for a certain preset duration, the compartment temperature value of the storage compartment does not reach the target set temperature value.

[0145] S316, control the compressor to operate at the set maximum compressor speed and control the blower to operate at a high speed gear until the compartment temperature value reaches the target set temperature value.

[0146] S317, after reaching the target set temperature value, the refrigerator enters the shutdown state.

[0147] S401, the user manually sets the refrigerator to enter the high load mode.

[0148] S402, determine the seventh compressor speed value of the compressor according to the fourth temperature difference between the ambient temperature value and the target set temperature value of the storage compartment.

[0149] S403, control the compressor to operate at the seventh compressor speed value and control the blower to operate at the third blower speed value, and the third blower speed value corresponds to the high speed gear of the blower.

[0150] S404, after reaching the target set temperature value, the refrigerator enters the shutdown state.

[0151] Generally speaking, by comprehensively considering parameters such as the temperature difference between the ambient temperature value and the target set temperature value of the storage compartment, the ambient noise value, the daily ambient temperature change, and the daily ambient noise change, the rotation speeds of the compressor and the blower in different operating modes such as the first power-on mode, the stable operation mode, the defrosting mode, and the high load mode are adaptively adjusted. While ensuring the refrigeration demand, the overall operating noise of the refrigerator in the stable operation mode is reduced, and the comfort of the user during actual use is improved.

[0152] S500, end.

[0153] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0154] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerator, characterized in that, Comprising: A box body, the box body being at least configured with at least one storage compartment; A refrigerant circulation system, the refrigerant circulation system including a compressor, a condenser, a throttling device, and an evaporator, for realizing refrigerant circulation and heat exchange between the outside and the storage compartment; A blower, used to promote the circulation of heat exchange air; A temperature sensor, arranged on the box body, for collecting the compartment temperature value and the ambient temperature value of the storage compartment; A noise sensor, arranged on the box body, for detecting the ambient noise value; A controller, the controller being connected to the temperature sensor and the noise sensor, and the controller being configured to: in the stable operation mode, determine a first compressor speed value of the compressor and a first blower speed value of the blower according to a first temperature difference between the ambient temperature value and a target set temperature value of the storage compartment, control the compressor to operate at the first compressor speed value and control the blower to operate at the first blower speed value, and the smaller the first temperature difference, the smaller the first compressor speed value; Adjust the first compressor speed value according to the current ambient noise value to obtain a second compressor speed value, and adjust the second compressor speed value according to a first change amount of the ambient temperature value within the speculated stable operation time to obtain a third compressor speed value; Control the compressor to operate at the third compressor speed value and control the blower to operate at a second blower speed value, and the blower speed gear corresponding to the second blower speed value is lower than or equal to the blower speed gear corresponding to the first blower speed value.

2. The refrigerator according to claim 1, characterized in that, When obtaining the second compressor speed value, the controller is configured to: obtain an average ambient noise value within a first preset duration; When the noise difference is greater than or equal to a first noise difference threshold, the second compressor speed value is the speed value after the first compressor speed value is increased by a first preset speed amplitude, where the noise difference is the difference between the average ambient noise value and the noise threshold; When the noise difference is greater than a second noise difference threshold and less than the first noise difference threshold, the second compressor speed value is the first compressor speed value; When the noise difference is less than or equal to the second noise difference threshold, the second compressor speed value is the speed value after the first compressor speed value is decreased by a first preset speed amplitude.

3. The refrigerator according to claim 1 or 2, characterized in that, When obtaining the third compressor speed value, the controller is configured to: obtain a reference temperature corresponding to the speculated stable operation time on a target ambient temperature change curve, and the first change amount of the ambient temperature value within the speculated stable operation time is a second temperature difference between the ambient temperature value and the reference temperature within the speculated stable operation time; When the second temperature difference exceeds a first temperature difference threshold and the ambient temperature value is lower than the corresponding reference temperature, the third compressor speed value is the speed value after the second compressor speed value is decreased by a second preset speed amplitude; When the second temperature difference exceeds the first temperature difference threshold and the ambient temperature value is higher than the corresponding reference temperature, the third compressor speed value is the speed value after the second compressor speed value is increased by a second preset speed amplitude.

4. The refrigerator according to claim 1, characterized in that, The controller is further configured to: when the chamber temperature value of the storage chamber does not reach the target set temperature value after the compressor operates at the third compressor speed value for a second preset duration, increase the speed of the compressor.

5. The refrigerator according to claim 1, wherein, The controller is further configured to: in the defrosting stage, in response to a defrosting preparation instruction, obtain the total defrosting duration, and perform defrosting cycle operation in a target time period in which the noise value in the target noise fitting curve is higher than a first noise threshold and the temperature value in the target temperature fitting curve is lower than a first temperature threshold according to the total defrosting duration; Alternatively, when there is no such target time period, perform defrosting cycle operation in a time period in which the noise value in the target noise fitting curve is higher than the first noise threshold.

6. The refrigerator according to claim 5, characterized in that, The defrosting stage includes a defrosting cycle and a defrosting recovery period after the defrosting cycle ends, and the second fan speed value corresponds to the low speed gear of the fan; The controller is further configured to: in the defrosting recovery period, determine a fourth compressor speed value of the compressor according to a third temperature difference between the ambient temperature value and the target set temperature value of the storage chamber, control the compressor to operate at the fourth compressor speed value, the smaller the third temperature difference, the smaller the fourth compressor speed value, and control the fan to operate at a third fan speed value, the third fan speed value corresponding to the high speed gear of the fan; When the compressor and the fan are operating, adjust the fourth compressor speed value according to the current ambient noise value to obtain a fifth compressor speed value, and adjust the fifth compressor speed value according to a second change amount of the ambient temperature value during a speculated defrosting recovery period time to obtain a sixth compressor speed value; Control the compressor to operate at the sixth compressor speed value.

7. The refrigerator according to claim 1 or 5 or 6, characterized in that, The controller is further configured to: In the high load mode, determine a seventh compressor speed value of the compressor according to a fourth temperature difference between the ambient temperature value and the target set temperature value of the storage chamber, wherein when the fourth temperature difference does not meet the high load temperature threshold condition, the seventh compressor speed value is a first speed which is the current speed reduced by a third preset speed amplitude, and when the fourth temperature difference meets the high load temperature threshold condition, the seventh compressor speed value is a second speed, the second speed being higher than the first speed; Control the compressor to operate at the seventh compressor speed value and control the fan to operate at a third fan speed value, the third fan speed value corresponding to the high speed gear of the fan.

8. The refrigerator according to claim 1 or 5 or 6, characterized in that, The controller is further configured to: in the first power-on stage, control the speed of the compressor according to a fifth temperature difference between the ambient temperature value and the target set temperature value of the storage chamber, the smaller the fifth temperature difference, the lower the speed of the compressor; And when the fifth temperature difference exceeds the gear conversion temperature threshold, control the speed of the fan to be converted from the low speed gear to the high speed gear.

9. The refrigerator according to claim 8, characterized in that, The controller is further configured to: after the compressor and the blower have operated for a third preset duration and the chamber temperature value of the storage chamber has not reached the target set temperature value, control the compressor to operate at the set maximum compressor speed and control the blower to operate at the high speed gear.

10. The refrigerator according to claim 1 or 5 or 6, characterized in that, The controller is further configured to calibrate the temperature sensor and the noise sensor. During the calibration of the noise sensor, a first noise average value of the ambient noise detected by the noise sensor within a preset time is obtained, transient noise values exceeding a preset noise value in the first noise average value are removed, an average value of the first noise average value after removing the transient noise values is obtained as a second noise average value, and calibration is performed based on the second noise average value and a set initial ambient noise value.

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