Refrigerator variable frequency control method and device, refrigerator and storage medium

Abstract

This disclosure discloses a refrigerator inverter control method, device, refrigerator, and storage medium. By responding to a cooling request from the refrigerator, the method obtains a set temperature corresponding to the cooling request. If the cooling request is for the freezer compartment, the method obtains the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment. Based on a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, the method determines a first rotational speed of the refrigerator compressor and a second rotational speed of the refrigeration fan. The preset mapping table includes multiple temperature difference values ​​and the corresponding compressor and refrigeration fan rotational speeds. The method controls the refrigerator compressor to operate at the first rotational speed and the refrigeration fan to operate at the second rotational speed until the compartment temperature reaches the set temperature. This disclosure effectively improves the accuracy of refrigerator inverter control.

Description

Technical Field

[0001] This disclosure relates to the field of refrigerator control technology, specifically to a refrigerator frequency conversion control method, device, refrigerator, and storage medium. Background Technology

[0002] Inverter technology in refrigerators improves cooling efficiency while reducing energy consumption by controlling the compressor and fan.

[0003] Currently, the common method for controlling compressors and fans is to directly control their speed based on the room temperature, resulting in a rather crude frequency conversion control logic. Summary of the Invention

[0004] This disclosure provides a refrigerator frequency conversion control method, device, refrigerator, and storage medium, aiming to improve the frequency conversion control accuracy of the refrigerator.

[0005] In a first aspect, embodiments of this disclosure provide a refrigerator inverter control method, including:

[0006] In response to the refrigerator's cooling request, obtain the set temperature corresponding to the refrigerator's cooling request;

[0007] If the cooling request is a cooling request for the freezer compartment, then obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment;

[0008] Based on a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, the first speed of the refrigerator compressor and the second speed of the refrigeration fan are determined. The preset mapping table contains multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value.

[0009] The refrigerator compressor is controlled to run at the first speed, and the refrigeration fan is controlled to run at the second speed until the compartment temperature reaches the set temperature.

[0010] Secondly, embodiments of this disclosure provide a refrigerator frequency converter control device, the refrigerator frequency converter control device comprising:

[0011] The response module is used to respond to the refrigerator's cooling request and obtain the set temperature corresponding to the refrigerator's cooling request.

[0012] The first acquisition module is used to acquire the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment if the cooling request is a cooling request for the freezer compartment.

[0013] The second acquisition module is used to determine the first speed of the refrigerator compressor and the second speed of the refrigeration fan according to a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature. The preset mapping table includes multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value.

[0014] The control module is used to control the refrigerator compressor to run at the first speed and to control the refrigeration fan to run at the second speed until the compartment temperature reaches the set temperature.

[0015] Thirdly, embodiments of this disclosure also provide a refrigerator, including a memory storing multiple instructions; a processor loads instructions from the memory to execute the steps of any of the refrigerator frequency conversion control methods provided in embodiments of this disclosure.

[0016] Fourthly, embodiments of this disclosure also provide a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to execute the steps of any of the refrigerator frequency conversion control methods provided in embodiments of this disclosure.

[0017] Compared to existing technologies that directly control refrigerator cooling based on the temperature of the freezer compartment, this disclosure pre-sets a mapping table containing multiple temperature difference values ​​and the corresponding compressor and refrigeration fan speeds. Based on this, after receiving a cooling request from the freezer compartment, the refrigerator can calculate the temperature difference between the evaporator temperature and the freezer compartment temperature. Then, according to the mapping table, the refrigerator can obtain the first compressor speed and the second refrigeration fan speed corresponding to this temperature difference value, and control the compressor to operate at the first speed and the refrigeration fan to operate at the second speed until the compartment temperature reaches the set temperature. Therefore, this disclosure can directly determine the compressor and refrigeration fan speeds corresponding to the temperature difference between the evaporator temperature and the freezer compartment temperature based on the pre-set mapping table. The temperature difference value corresponds one-to-one with the speeds in the pre-set mapping, allowing the compressor and refrigeration fan to operate at the corresponding speeds. Compared to fuzzy control based solely on compartment temperature, this disclosure achieves more precise refrigerator frequency conversion control and improves the accuracy of refrigerator frequency conversion control.

[0018] Based on this, the present disclosure can effectively reduce refrigerator energy consumption and improve refrigerator cooling effect by controlling the operation of the compressor and refrigeration fan according to the speed in the preset mapping table. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first process diagram provided in the embodiments of this disclosure;

[0021] Figure 2 This is a schematic diagram of the second process provided in the embodiments of this disclosure;

[0022] Figure 3 This is a schematic diagram of the structure of the refrigerator frequency converter control device provided in the embodiments of this disclosure;

[0023] Figure 4 This is a schematic diagram of the structure of the refrigerator provided in the embodiments of this disclosure. Detailed Implementation

[0024] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Furthermore, in the description of the embodiments of this disclosure, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0025] The following detailed description is provided in conjunction with the accompanying drawings. In this embodiment, a refrigerator is used as an example of the executing entity. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the accompanying drawings.

[0026] As explained in the background, compared to fixed-frequency products, variable-frequency technology, by controlling the different speeds of the compressor and fan, makes refrigerators suitable for a wider range of applications. However, the industry standard for controlling compressor and fan speeds is generally based on different speeds corresponding to different ambient temperatures, and increasing the compressor speed at the same ambient temperature.

[0027] Therefore, the overall control logic is relatively crude, which not only fails to give full play to the advantages of the refrigerator's inverter technology, but also does not contribute to the energy saving and noise control of the whole machine, resulting in higher overall energy consumption and more noticeable noise (such as the noise generated during the operation of the compressor and fan).

[0028] To address the aforementioned issues, this disclosure provides a refrigerator frequency conversion control method, device, refrigerator, and computer-readable storage medium.

[0029] Please refer to Figure 1 The specific process of the refrigerator inverter control method can be summarized in steps S10 to S30, which include:

[0030] Step S10: Respond to the refrigerator's cooling request and obtain the set temperature corresponding to the refrigerator's cooling request;

[0031] It should be noted that in this embodiment, the user can manually set the cooling temperature of each compartment of the refrigerator (i.e., the set temperature in this embodiment) and trigger the corresponding cooling request after the refrigerator starts. Alternatively, the refrigerator can also automatically trigger the cooling request.

[0032] Based on this, the refrigerator can respond to the above cooling request and obtain the set temperature stored in the refrigerator's internal program or the set temperature set by the user.

[0033] Step S20: If the cooling request is a cooling request for the freezer compartment, then obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment.

[0034] In this embodiment, after the refrigerator obtains the cooling request and the corresponding set temperature, it can determine whether the cooling request is a cooling request for the freezer compartment.

[0035] It is understandable that refrigerators can generally be divided into multiple compartments, including a freezer compartment, a refrigerator compartment, and an ice-temperature compartment. In this embodiment, different refrigerator control strategies can be employed to address the cooling needs of the freezer compartment and the other compartments. In this way, this embodiment can meet the low-temperature requirements of the freezer compartment and also distribute cold air evenly throughout the refrigerator using a refrigeration fan.

[0036] When the refrigerator determines that the above cooling request is a cooling request for the freezer compartment, it can obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment.

[0037] Step S30: Determine the first rotation speed of the refrigerator compressor and the second rotation speed of the refrigeration fan according to the preset mapping table and the first temperature difference value between the evaporation temperature and the compartment temperature. The preset mapping table contains multiple temperature difference values ​​and the rotation speed of the compressor and the rotation speed of the refrigeration fan corresponding to each temperature difference value.

[0038] It should be noted that in this embodiment, the preset mapping table contains multiple temperature difference values ​​and the compressor speed and refrigeration fan speed corresponding to each temperature difference value. This preset mapping table can be calculated from the refrigerator's historical operating parameters or it can be manually calculated and imported.

[0039] Furthermore, it's understandable that the temperature difference between the evaporator's evaporation temperature and the freezer compartment's temperature is significant, with the evaporator's temperature being much lower than the freezer compartment's temperature. As the refrigerator operates, the freezer compartment's temperature gradually decreases, and the temperature difference between the evaporator's temperature and the freezer compartment's temperature gradually decreases. Therefore, the temperature difference between the evaporator's temperature and the freezer compartment's temperature changes continuously throughout the refrigerator's operation.

[0040] Based on this, after obtaining the evaporation temperature of the evaporator and the compartment temperature of the freezer, the refrigerator can obtain the temperature difference between the evaporation temperature and the compartment temperature during the refrigerator's operation. Then, based on the temperature difference, it can query the preset mapping table to obtain the compressor speed (i.e., the first speed in this embodiment) and the refrigeration fan speed (i.e., the second speed in this embodiment) corresponding to the temperature value in the mapping table.

[0041] Step S40: Control the refrigerator compressor to run at the first speed and control the refrigeration fan to run at the second speed until the compartment temperature reaches the set temperature.

[0042] After obtaining the first speed of the compressor and the second speed of the refrigeration fan corresponding to the temperature difference between the evaporator and the freezer compartment according to the above-mentioned preset mapping table, the refrigerator can control the compressor to run at the first speed and control the refrigeration fan to run at the second speed until the compartment temperature drops to the above-mentioned preset temperature (generally -18°C).

[0043] It should be noted that in this embodiment, as the refrigerator operates and heat is exchanged within the compartments, the temperature difference between the evaporator and the freezer compartment is constantly changing. Once the refrigerator detects a change in this temperature difference, it can query the preset mapping table again based on the updated temperature difference to obtain the compressor speed and freezer fan speed corresponding to the updated temperature difference. If the compressor speed corresponding to the updated temperature difference is higher than the first speed, and the freezer fan speed is higher than the second speed, then the refrigerator can increase the first and second speeds until it reaches the speed corresponding to the updated temperature difference.

[0044] Understandably, in this embodiment, after the refrigerator starts, the temperature difference between the evaporator and the freezer compartment is large. The refrigerator can increase the operating speed of the compressor and the refrigeration fan, rapidly increasing the amount of refrigerant in the evaporator and increasing the airflow of the refrigeration fan, allowing the cold air to be quickly and evenly distributed in the freezer compartment, causing the temperature of the freezer compartment to drop rapidly. As the refrigerator continues to operate, the temperature difference between the evaporator and the freezer compartment gradually decreases, and the temperature of the freezer compartment drops significantly. At this point, the refrigerator can reduce the operating speed of the compressor and the refrigeration fan, which reduces both the compressor's operating energy and the noise generated during compressor and fan operation. Therefore, the speed control strategy curve of the compressor and the refrigeration fan shows a trend of first rising and then falling.

[0045] When the temperature difference between the evaporation temperature and the compartment temperature is large, both the compressor speed and the refrigeration fan speed tend to increase, achieving rapid cooling of the freezer compartment. When the temperature difference between the evaporation temperature and the compartment temperature is small, both the compressor speed and the refrigeration fan speed tend to decrease, significantly reducing the refrigerator's energy consumption.

[0046] Specifically, for example, such as Figure 2 As shown, if N-2 is the inflection point of the above speed control strategy curve, when the first temperature difference is greater than N, the operating speed of the compressor and the refrigeration fan in the refrigerator is increased (R3>R2>R1, r3>r2>r1) until the temperature difference is less than N-2, and the operating speed of the compressor and the refrigeration fan is reduced. Therefore, the speed relationship of the compressor can be: R3>R2>R1>Rn; correspondingly, the speed relationship of the refrigeration fan can be: r3>r2>r1>rn.

[0047] Therefore, in this embodiment, the refrigerator can respond to the aforementioned cooling request and obtain the set temperature stored in the refrigerator's internal program or the set temperature set by the user. When the refrigerator determines that the aforementioned cooling request is a cooling request for the freezer compartment, it can obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment. After obtaining the evaporation temperature of the evaporator and the compartment temperature of the freezer compartment, the refrigerator can obtain the temperature difference between the evaporation temperature and the compartment temperature during refrigerator operation. Then, it can look up the aforementioned preset mapping table based on the temperature difference value to obtain the compressor speed corresponding to the temperature value in the mapping table, and control the compressor and the refrigeration fan to operate at the corresponding speed.

[0048] Compared to existing technologies that directly control refrigerator cooling based on the temperature of the freezer compartment, this disclosure pre-sets a mapping table containing multiple temperature difference values ​​and the corresponding compressor and refrigeration fan speeds. Based on this, after receiving a cooling request from the freezer compartment, the refrigerator can obtain the temperature difference between the evaporator temperature and the freezer compartment temperature. Then, according to the mapping table, the refrigerator can obtain the first compressor speed and the second refrigeration fan speed corresponding to this temperature difference value, and control the compressor to operate at the first speed and the refrigeration fan to operate at the second speed until the compartment temperature reaches the set temperature. Therefore, this disclosure can directly determine the compressor and refrigeration fan speeds corresponding to the temperature difference between the evaporator temperature and the freezer compartment temperature based on the pre-set mapping table. The temperature difference value corresponds one-to-one with the speeds in the pre-set mapping, allowing the compressor and refrigeration fan to operate at the corresponding speeds. Compared to fuzzy control based solely on compartment temperature, this disclosure achieves more precise refrigerator frequency conversion control and improves the accuracy of refrigerator frequency conversion control. Based on this, the present disclosure can effectively reduce refrigerator energy consumption and improve refrigerator cooling effect by controlling the operation of the compressor and refrigeration fan according to the speed in the preset mapping table.

[0049] In one embodiment, before step S10, "responding to the refrigerator's cooling request and obtaining the set temperature corresponding to the refrigerator's cooling request," the following may be included:

[0050] Step S50: Obtain the volume of the freezer compartment, the target compartment temperature, the evaporation area of ​​the evaporator in the refrigerator, and the compression ratio of the refrigerant in the compressor.

[0051] Step S60: Obtain multiple sets of historical evaporation temperatures and corresponding historical chamber temperatures, and obtain the historical temperature difference between the historical evaporation temperatures and the historical chamber temperatures;

[0052] Step S70: For each historical temperature difference value, determine the compressor speed and the refrigeration fan speed corresponding to the historical temperature difference value based on the compartment volume, the target compartment temperature, the shrinkage evaporation area, and the compression ratio.

[0053] In this embodiment, the refrigerator can pre-build the aforementioned preset mapping table before performing frequency conversion control.

[0054] Specifically, for example, the refrigerator can first acquire a dataset containing multiple sets of historical evaporation temperatures and corresponding historical compartment temperatures, and then calculate the historical temperature difference Δt between the historical evaporation temperature and the historical compartment temperature. i (i is the number of temperature difference values).

[0055] Furthermore, the refrigerator can obtain the compartment volume V of the freezer compartment, the target compartment temperature T, the evaporation area S of the evaporator inside the refrigerator, and the compression ratio PR of the refrigerant in the compressor.

[0056] Furthermore, the refrigerator can, based on the aforementioned compartment volume V, target compartment temperature T, evaporation area S, and compression ratio PR, and according to this relationship (N... 压 N 冷 )=f(V,T,S,PR,Δt i ,m,n), calculate the historical temperature difference Δt i The corresponding compressor speed N 压 and the rotational speed N of the refrigeration fan 冷 .

[0057] Specifically, for example,

[0058] Wherein, m and n are temperature coefficients, and the values ​​of m and n can be calculated based on the historical operating parameters of the refrigerator. This embodiment does not impose specific limitations on the values ​​of m and n.

[0059] Furthermore, the refrigerator can adjust the temperature based on multiple sets of historical temperature difference values ​​Δt. i and the corresponding compressor speed N 压 and the rotational speed N of the refrigeration fan 冷 Construct the above mapping table.

[0060] Furthermore, after step S10 above, the following may also be included:

[0061] Step S80: Obtain the ambient temperature and humidity of the environment where the refrigerator is located;

[0062] Step S90: Obtain the base speed corresponding to the compressor and the refrigeration fan based on the ambient temperature and the ambient humidity;

[0063] In this embodiment, as Figure 2 As shown, after the refrigerator is started, it can first collect the ambient temperature and humidity of its surroundings, and then determine the base speed of the compressor and the base speed of the refrigeration fan based on the ambient temperature and humidity.

[0064] Based on this, step S20 above, "determining the first speed of the refrigerator compressor and the second speed of the refrigeration fan according to the preset mapping table and the first temperature difference between the evaporation temperature and the compartment temperature," may include:

[0065] Step S201: Calculate the first temperature difference between the evaporation temperature and the chamber temperature;

[0066] Step S202: If the first temperature difference value is less than the preset first temperature difference threshold, then operate according to the base speed.

[0067] Step S203: If the first temperature value is greater than the preset second temperature difference threshold, then query the preset mapping table to obtain the first speed of the refrigerator compressor and the second speed of the refrigeration fan corresponding to the first temperature difference value.

[0068] In this embodiment, as described above, the temperature difference between the evaporator and the freezer compartment is in a dynamic process as the refrigerator operates and the heat load inside is exchanged. As the refrigerator operates stably, the heat exchange tends to be balanced, and the temperature difference between the evaporator and the freezer compartment is small. The temperature of the freezer compartment is basically reduced to the set temperature. Therefore, in this embodiment, when the temperature difference is less than the preset first temperature difference threshold, it can directly operate according to the above-mentioned basic rotation speed without consulting the mapping table.

[0069] When the temperature difference between the evaporation temperature and the compartment temperature is greater than the preset second temperature difference value, the refrigerator can control the operation of the compressor and the refrigeration fan by querying the rotation speed corresponding to the temperature difference value in the mapping table, as described in the above embodiment.

[0070] It should be noted that, in this embodiment, as Figure 2 As shown, the second temperature difference threshold can be N, while the first temperature difference threshold is not in Figure 2 The markings indicate that the first temperature difference threshold can be close to 0, meaning that the evaporation temperature of the evaporator is basically the same as the temperature of the freezer compartment. At this time, the compressor and the refrigeration fan can run directly at the base speed.

[0071] Therefore, in this embodiment, a mapping table between temperature difference and speed can be pre-constructed, and based on the temperature difference, it can be determined whether to run directly according to the base speed or according to the corresponding speed in the mapping table, thus realizing flexible control of the compressor and refrigeration speed. The speed of the compressor and refrigeration fan can be adjusted within a large range, meeting the refrigeration needs of the refrigerator.

[0072] In one embodiment, after step S40, "controlling the refrigerator compressor to operate at the first speed and controlling the refrigeration fan to operate at the second speed," the following may be included:

[0073] Step S100: Obtain a second temperature difference value between the room temperature and the set temperature;

[0074] Step S110: If the second temperature difference value is less than the preset third temperature difference threshold, then reduce the operating speed of the compressor to the preset third speed and reduce the preset second target operating speed of the refrigeration fan to the preset fourth speed.

[0075] Step S120: Control the compressor to maintain the third speed and control the refrigeration fan to maintain the fourth speed;

[0076] Step S130: Until the temperature of the compartment reaches the set temperature, control the compressor to stop.

[0077] In this embodiment, after the refrigerator reduces the operating speed of the compressor and the refrigeration fan, it can obtain a second temperature difference value between the compartment temperature and the above-mentioned set temperature.

[0078] It is understood that in this embodiment, as the refrigerator operates, the temperature difference between the freezer compartment and the evaporator gradually decreases. The refrigerator can reduce the speed of the compressor and the refrigeration fan, and obtain the second temperature difference between the compartment temperature and the set temperature in real time during the speed reduction process.

[0079] If the second temperature difference value is less than the preset third temperature difference threshold (e.g.) Figure 2 If the value is set to "2" (which can be set based on experience), the compressor's operating speed can be directly reduced to the preset third speed Rn, and the refrigeration fan's preset operating speed can be reduced to the preset fourth speed rn.

[0080] Furthermore, since the temperature difference between the freezer compartment and the evaporator is small at this point, and the temperature in the refrigerator compartment has already dropped significantly, there is no need to control the compressor and refrigeration fan to run at high speeds. The refrigerator can control the compressor to run at the third speed Rn and the refrigeration fan to run at the fourth speed rn. Additionally, the refrigerator monitors the freezer compartment temperature in real time during operation to ensure it reaches the set temperature Ts. If the compartment temperature reaches the set temperature Ts (i.e., the shutdown temperature), the compressor can be stopped.

[0081] In another embodiment, after the refrigerator obtains the second temperature difference value between the compartment temperature and the set temperature, it can also directly look up the above mapping table based on the temperature difference value and control the compressor and refrigeration fan to operate according to the corresponding speed in the mapping table.

[0082] By employing the aforementioned compressor and refrigeration fan speed control strategy, the temperature difference between the refrigeration fan and the evaporator can be monitored in real time. Based on the trend of this temperature difference, the compressor and refrigeration fan speeds are first increased, and then decreased. This ensures that when the temperature in the freezer compartment drops significantly (i.e., the temperature difference between the refrigeration fan and the evaporator becomes smaller), the compressor and refrigeration fan are controlled to operate at the lowest speed until they stop. This embodiment can achieve rapid cooling of the freezer compartment, significantly reduce overall energy consumption, and alleviate noise during compressor and refrigeration fan operation.

[0083] In one embodiment, after step S40, "controlling the refrigerator compressor to operate at the first speed and controlling the refrigeration fan to operate at the second speed," the following may be included:

[0084] Step S140: Obtain the temperature difference value at each moment during the temperature difference change process between the evaporation temperature and the chamber temperature;

[0085] Step S150: Obtain the temperature difference distribution corresponding to the plurality of temperature difference values;

[0086] Step S160: Correct the first temperature difference threshold and the second temperature difference threshold according to the temperature difference distribution.

[0087] It should be noted that in this embodiment, the first temperature difference threshold and the second temperature difference threshold are generally set in advance based on empirical values. However, factors such as the environment in which the refrigerator is located and the heat load inside the refrigerator will affect the refrigerator's cooling process.

[0088] Therefore, in this embodiment, after the refrigerator controls the compressor and refrigeration fan to run until the compartment temperature reaches the set temperature, and then controls the compressor to stop, this start-stop cycle can be considered as a start-stop cycle. Furthermore, the refrigerator can obtain the temperature difference value at each moment during the change in temperature difference between the evaporation temperature and the compartment temperature within this start-stop cycle; for example, it can collect the temperature difference value between the compartment temperature and the evaporation temperature every 3 minutes.

[0089] Furthermore, after acquiring multiple temperature difference values, the refrigerator can establish a temperature difference distribution corresponding to these values. The refrigerator can then use this temperature difference distribution to correct and optimize the aforementioned multiple temperature difference thresholds.

[0090] For example, the refrigerator can increase or decrease the temperature difference threshold based on the above temperature difference distribution, and the compressor and refrigeration fan speed control strategy can be more refined. Through iterative correction, the overall energy efficiency can be optimized.

[0091] In one embodiment, step S130, "controlling the compressor to stop until the compartment temperature reaches the set temperature," may further include:

[0092] Step S170: In response to the cooling request of the target compartment, the refrigeration fan is controlled to operate according to the historical fan speed of the refrigeration fan. The target compartment is any other compartment of the refrigerator besides the freezer compartment. As described above, a refrigerator can generally be divided into multiple compartments, including a refrigerator compartment, a freezer compartment, and a temperature-controlled compartment, in addition to the freezer compartment. In this embodiment, different refrigerator control strategies can be employed for cooling requests from the freezer compartment and cooling requests from other compartments.

[0093] Specifically, such as Figure 2 As shown, after the refrigerator controls the compressor to stop, if a cooling request is received from the target compartment (i.e., other compartments besides the freezer compartment), the historical speed of the refrigeration fan can be obtained, and the operation of the refrigeration fan can be controlled according to the historical speed. The refrigeration fan will then distribute the cold air evenly in the target compartment.

[0094] It is evident that after the compressor is turned off, if a cooling request is received from other compartments, the compressor will not be turned on again. Instead, the refrigeration fan will be directly controlled to run. This reduces the refrigerator's energy consumption, prevents other compartments from being too cold, and ensures a uniform distribution of cold air in other compartments.

[0095] Furthermore, in step S170 above, "if the cooling request is a cooling request for the target room, then control the operation of the refrigeration fan according to the historical fan speed of the refrigeration fan" may also include:

[0096] Step a: If the cooling request is a cooling request for the target room, then obtain the lowest fan speed from the historical fan speeds of the refrigeration fan in the previous start-stop cycle.

[0097] Step b: Control the operation of the refrigeration fan according to the minimum fan speed;

[0098] Step c, until a cooling request from the freezer compartment is obtained, execute the step of responding to the cooling request of the refrigerator and obtaining the set temperature corresponding to the cooling request of the refrigerator.

[0099] In this embodiment, as Figure 2 If, after the compressor stops, the refrigerator receives a cooling request triggered by another compartment outside the freezer compartment, the refrigerator can obtain the historical fan speed of the freezer fan during the previous start-stop cycle, as well as the lowest fan speed among those historical fan speeds. Furthermore, the refrigerator can control the freezer fan to operate at that lowest fan speed.

[0100] Specifically, for example, if the lowest fan speed in the historical fan speeds during the previous start-stop cycle of the refrigeration fan is rn, the refrigerator can control the refrigeration fan to operate at speed rn. Furthermore, if a cooling request is received from the freezer compartment, the compressor and refrigeration fan can be controlled to operate. The specific control strategy can be found in the above embodiments and will not be repeated here.

[0101] Therefore, in this embodiment, if there is a cooling request from other compartments, the refrigeration fan can be directly controlled to run at the lowest speed of the previous start-stop cycle. This can not only meet the cooling needs of other compartments, but also effectively reduce the energy consumption of the refrigerator. Furthermore, it avoids the noise and heat problems caused by the continuous operation of the compressor, thus improving the refrigerator's cooling performance.

[0102] This embodiment also provides a refrigerator inverter control device, which can be integrated into the refrigerator. For example, such as... Figure 3 As shown, the refrigerator inverter control device may include:

[0103] The response module 1001 is used to respond to the refrigerator's cooling request and obtain the set temperature corresponding to the refrigerator's cooling request.

[0104] The first acquisition module 1002 is used to acquire the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer if the cooling request is a cooling request for the freezer compartment.

[0105] The second acquisition module 1003 is used to determine the first speed of the refrigerator compressor and the second speed of the refrigeration fan according to a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, wherein the preset mapping table contains multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value;

[0106] The control module 1004 is used to control the refrigerator compressor to run at the first speed and to control the refrigeration fan to run at the second speed until the compartment temperature reaches the set temperature.

[0107] Optionally, the refrigerator inverter control device in this disclosure further includes:

[0108] The third acquisition module is used to acquire the volume of the freezer compartment, the target compartment temperature, the evaporation area of ​​the evaporator in the refrigerator, and the compression ratio of the refrigerant in the compressor.

[0109] The fourth acquisition module is used to acquire multiple sets of historical evaporation temperatures and corresponding historical room temperatures, and to acquire the historical temperature difference between the historical evaporation temperature and the historical room temperature.

[0110] The determination module is used to determine the compressor speed and the refrigeration fan speed corresponding to each historical temperature difference value, based on the compartment volume, the target compartment temperature, the shrinkage evaporation area, and the compression ratio.

[0111] A construction module is used to construct the preset mapping table based on the historical temperature difference value and the compressor speed and the refrigeration fan speed corresponding to the historical temperature difference value.

[0112] Optionally, the refrigerator inverter control device in this disclosure further includes:

[0113] The fifth acquisition module is used to acquire the ambient temperature and humidity of the environment in which the refrigerator is located;

[0114] The sixth acquisition module is used to acquire the base speed corresponding to the compressor and the refrigeration fan based on the ambient temperature and the ambient humidity.

[0115] The second acquisition module 1003 is also used for

[0116] Calculate the first temperature difference between the evaporation temperature and the chamber temperature;

[0117] If the first temperature difference value is less than the preset first temperature difference threshold, then the operation is based on the base speed;

[0118] If the first temperature value is greater than the preset second temperature difference threshold, then query the preset mapping table to obtain the first speed of the refrigerator compressor and the second speed of the refrigeration fan corresponding to the first temperature difference value.

[0119] Optionally, the refrigerator inverter control device in this disclosure further includes:

[0120] The seventh acquisition module is used to acquire a second temperature difference value between the room temperature and the set temperature;

[0121] The first control module is used to reduce the operating speed of the compressor to a preset third speed and reduce the preset second target operating speed of the refrigeration fan to a preset fourth speed if the second temperature difference value is less than a preset third temperature difference threshold.

[0122] The second control module is used to control the compressor to maintain the third speed and to control the refrigeration fan to maintain the fourth speed.

[0123] The third control module is used to control the compressor to stop when the temperature of the compartment reaches the set temperature.

[0124] Optionally, the refrigerator inverter control device in this disclosure further includes:

[0125] The eighth acquisition module is used to acquire the temperature difference value at each moment during the temperature difference change process between the evaporation temperature and the chamber temperature;

[0126] The ninth acquisition module is used to acquire the temperature difference distribution corresponding to the plurality of temperature difference values;

[0127] The correction module is used to correct the first temperature difference threshold, the second temperature difference threshold, and the third temperature difference threshold according to the temperature difference distribution.

[0128] Optionally, the refrigerator inverter control device in this disclosure further includes:

[0129] The fourth control module is used to respond to the cooling request of the target compartment and control the operation of the refrigeration fan according to the historical fan speed of the refrigeration fan. The target compartment is the other compartment of the refrigerator other than the refrigeration compartment.

[0130] Optionally, the fourth control module is further configured to:

[0131] If the cooling request is a cooling request for the target room, then obtain the lowest fan speed from the historical fan speeds in the previous start-stop cycle of the refrigeration fan.

[0132] The operation of the refrigeration fan is controlled according to the minimum fan speed.

[0133] The process continues until a cooling request from the freezer compartment is received, and then the refrigerator responds to the cooling request by obtaining the set temperature corresponding to the cooling request.

[0134] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0135] like Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of this disclosure. The refrigerator 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored on the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the refrigerator structure shown in the figure does not constitute a limitation on the refrigerator, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0136] The processor 1101 is the control center of the refrigerator 1100. It connects to various parts of the refrigerator 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions of the refrigerator 1100 and processes data, thereby performing overall monitoring of the refrigerator 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this disclosure.

[0137] In this embodiment of the disclosure, the processor 1101 in the refrigerator 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102 according to the following steps, and the processor 1101 runs the application programs stored in the memory 1102 to realize various functions, such as:

[0138] In response to the refrigerator's cooling request, obtain the set temperature corresponding to the refrigerator's cooling request;

[0139] If the cooling request is a cooling request for the freezer compartment, then obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment;

[0140] Based on a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, the first speed of the refrigerator compressor and the second speed of the refrigeration fan are determined. The preset mapping table contains multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value.

[0141] The refrigerator compressor is controlled to run at the first speed, and the refrigeration fan is controlled to run at the second speed until the compartment temperature reaches the set temperature.

[0142] Optionally, it also includes:

[0143] The volume of the freezer compartment, the target compartment temperature, the evaporation area of ​​the evaporator in the refrigerator, and the compression ratio of the refrigerant in the compressor are obtained.

[0144] Obtain multiple sets of historical evaporation temperatures and corresponding historical chamber temperatures, and obtain the historical temperature difference between the historical evaporation temperatures and the historical chamber temperatures;

[0145] For each historical temperature difference value, the compressor speed and the refrigeration fan speed corresponding to the historical temperature difference value are determined based on the compartment volume, the target compartment temperature, the shrinkage evaporation area, and the compression ratio.

[0146] Based on the historical temperature difference value and the corresponding compressor speed and refrigeration fan speed, the preset mapping table is constructed.

[0147] Optionally, it also includes:

[0148] The ambient temperature and humidity of the environment in which the refrigerator is located are obtained;

[0149] Based on the ambient temperature and the ambient humidity, the base speeds corresponding to the compressor and the refrigeration fan are obtained;

[0150] The step of determining the first speed of the refrigerator compressor and the second speed of the refrigeration fan based on a preset mapping table and a first temperature difference between the evaporation temperature and the compartment temperature includes:

[0151] Calculate the first temperature difference between the evaporation temperature and the chamber temperature;

[0152] If the first temperature difference value is less than the preset first temperature difference threshold, then the operation is based on the base speed;

[0153] If the first temperature value is greater than the preset second temperature difference threshold, then query the preset mapping table to obtain the first speed of the refrigerator compressor and the second speed of the refrigeration fan corresponding to the first temperature difference value.

[0154] Optionally, it also includes:

[0155] Obtain a second temperature difference value between the room temperature and the set temperature;

[0156] If the second temperature difference value is less than the preset third temperature difference threshold, the operating speed of the compressor is reduced to the preset third speed, and the preset second target operating speed of the refrigeration fan is reduced to the preset fourth speed.

[0157] The compressor is controlled to maintain the third speed, and the refrigeration fan is controlled to maintain the fourth speed.

[0158] The compressor will stop when the temperature in the compartment reaches the set temperature.

[0159] Optionally, it also includes:

[0160] Obtain the temperature difference value at each moment during the temperature difference change between the evaporation temperature and the chamber temperature;

[0161] Obtain the temperature difference distribution corresponding to the multiple temperature difference values;

[0162] Based on the temperature difference distribution, the first temperature difference threshold, the second temperature difference threshold, and the third temperature difference threshold are corrected.

[0163] Optionally, it also includes:

[0164] In response to a cooling request from a target compartment, the operation of the refrigeration fan is controlled based on the historical fan speed of the refrigeration fan. The target compartment is any other compartment of the refrigerator other than the freezer compartment.

[0165] Optionally, responding to the cooling request of the target room by controlling the operation of the chiller fan based on the historical fan speed includes:

[0166] If the cooling request is a cooling request for the target room, then obtain the lowest fan speed from the historical fan speeds in the previous start-stop cycle of the refrigeration fan.

[0167] The operation of the refrigeration fan is controlled according to the minimum fan speed.

[0168] The process continues until a cooling request from the freezer compartment is received, and then the refrigerator responds to the cooling request by obtaining the set temperature corresponding to the cooling request.

[0169] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0170] Optional, such as Figure 4 As shown, the refrigerator 1100 also includes: a touch screen display 1103, an radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen display 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that... Figure 4 The refrigerator structure shown does not constitute a limitation on the refrigerator and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0171] The touch display screen 1103 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1103 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various GUIs of the refrigerator. These GUIs can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), and generate corresponding operation commands, which then execute the corresponding program. Optionally, the touch panel may include a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1101. It can also receive and execute commands from the processor 1101. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1101 to determine the type of touch event. Subsequently, the processor 1101 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1103 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1103 can be implemented as two independent components to achieve input and output functions. That is, the touch display screen 1103 can also be used as part of the input unit 1106 to achieve input functions.

[0172] The radio frequency circuit 1104 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other refrigerators, and to transmit and receive signals with network devices or other refrigerators.

[0173] Audio circuit 1105 can be used to provide an audio interface between the user and the refrigerator via a speaker and a microphone. Audio circuit 1105 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1105, converted back into audio data, and then processed by processor 1101 before being transmitted via radio frequency circuit 1104 to, for example, another refrigerator, or output to memory 1102 for further processing. Audio circuit 1105 may also include an earphone jack to provide communication between external headphones and the refrigerator.

[0174] The input unit 1106 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0175] Power supply 1107 is used to supply power to the various components of refrigerator 1100. Optionally, power supply 1107 can be logically connected to processor 1101 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1107 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0176] although Figure 4 As not shown in the diagram, the refrigerator 1100 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0177] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0178] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0179] Therefore, embodiments of this disclosure provide a computer-readable storage medium storing a plurality of computer programs that can be loaded by a processor to execute any of the refrigerator inverter control methods provided in embodiments of this disclosure. The computer program can execute the following steps of the refrigerator inverter control method:

[0180] In response to the refrigerator's cooling request, obtain the set temperature corresponding to the refrigerator's cooling request;

[0181] If the cooling request is a cooling request for the freezer compartment, then obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment;

[0182] Based on a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, the first speed of the refrigerator compressor and the second speed of the refrigeration fan are determined. The preset mapping table contains multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value.

[0183] The refrigerator compressor is controlled to run at the first speed, and the refrigeration fan is controlled to run at the second speed until the compartment temperature reaches the set temperature.

[0184] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0185] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0186] Since the computer program stored in the computer-readable storage medium can execute any of the refrigerator frequency conversion control methods provided in the embodiments of this disclosure, the beneficial effects that any of the refrigerator frequency conversion control methods provided in the embodiments of this disclosure can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0187] In the above embodiments of the refrigerator inverter control device, computer-readable storage medium, and refrigerator, the descriptions of each embodiment have different focuses. Parts not detailed in a particular embodiment can be found in the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes and beneficial effects of the above-described refrigerator inverter control device, computer-readable storage medium, refrigerator, and their corresponding units can be referred to the description of the refrigerator inverter control method in the above embodiments, and will not be repeated here.

[0188] The above provides a detailed description of a refrigerator frequency conversion control method, device, refrigerator, and computer-readable storage medium provided by the embodiments of this disclosure. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A refrigerator frequency conversion control method, characterized in that, The refrigerator frequency conversion control method includes: In response to the refrigerator's cooling request, obtain the set temperature corresponding to the refrigerator's cooling request; If the cooling request is a cooling request for the freezer compartment, then obtain the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment; Based on a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature, the first speed of the refrigerator compressor and the second speed of the refrigeration fan are determined. The preset mapping table contains multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value. The refrigerator compressor is controlled to run at the first speed, and the refrigeration fan is controlled to run at the second speed until the compartment temperature reaches the set temperature. The step of responding to the refrigerator's cooling request and obtaining the set temperature corresponding to the refrigerator's cooling request includes: The ambient temperature and humidity of the environment in which the refrigerator is located are obtained; Based on the ambient temperature and the ambient humidity, the base speeds corresponding to the compressor and the refrigeration fan are obtained; The step of determining the first speed of the refrigerator compressor and the second speed of the refrigeration fan based on a preset mapping table and a first temperature difference between the evaporation temperature and the compartment temperature includes: Calculate the first temperature difference between the evaporation temperature and the chamber temperature; If the first temperature difference value is less than the preset first temperature difference threshold, then the operation is based on the base speed; If the first temperature difference value is greater than the preset second temperature difference threshold, then query the preset mapping table to obtain the first speed of the refrigerator compressor and the second speed of the refrigeration fan corresponding to the first temperature difference value.

2. The refrigerator frequency conversion control method according to claim 1, characterized in that, Before determining the first speed of the refrigerator compressor and the second speed of the refrigeration fan based on a preset mapping table and the first temperature difference between the evaporation temperature and the compartment temperature, the process includes: The volume of the freezer compartment, the target compartment temperature, the evaporation area of ​​the evaporator in the refrigerator, and the compression ratio of the refrigerant in the compressor are obtained. Obtain multiple sets of historical evaporation temperatures and corresponding historical chamber temperatures, and obtain the historical temperature difference between the historical evaporation temperatures and the historical chamber temperatures; For each historical temperature difference value, the compressor speed and the refrigeration fan speed corresponding to the historical temperature difference value are determined based on the compartment volume, the target compartment temperature, the evaporation area, and the compression ratio. Based on the historical temperature difference value and the corresponding compressor speed and refrigeration fan speed, the preset mapping table is constructed.

3. The refrigerator frequency conversion control method according to claim 1, characterized in that, After controlling the refrigerator compressor to operate at the first speed and controlling the refrigeration fan to operate at the second speed, the following steps are included: Obtain a second temperature difference value between the room temperature and the set temperature; If the second temperature difference value is less than the preset third temperature difference threshold, then the operating speed of the compressor is reduced to the preset third speed, and the operating speed of the refrigeration fan is reduced to the preset fourth speed. The compressor is controlled to maintain the third speed, and the refrigeration fan is controlled to maintain the fourth speed. The compressor will stop when the temperature in the compartment reaches the set temperature.

4. The refrigerator frequency conversion control method according to claim 3, characterized in that, After controlling the refrigerator compressor to operate at the first speed and controlling the refrigeration fan to operate at the second speed, the following steps are included: Obtain the temperature difference value at each moment during the temperature difference change between the evaporation temperature and the chamber temperature; Obtain the temperature difference distribution corresponding to the multiple temperature difference values; Based on the temperature difference distribution, the first temperature difference threshold, the second temperature difference threshold, and the third temperature difference threshold are corrected.

5. The refrigerator frequency conversion control method according to claim 3, characterized in that, After the temperature of the compartment reaches the set temperature and the compressor is controlled to stop, the process includes: In response to a cooling request from a target compartment, the operation of the refrigeration fan is controlled based on the historical fan speed of the refrigeration fan. The target compartment is any other compartment of the refrigerator other than the freezer compartment.

6. The refrigerator frequency conversion control method according to claim 5, characterized in that, The step of responding to the cooling request of the target room and controlling the operation of the chiller fan based on the historical fan speed includes: If the cooling request is a cooling request for the target room, then obtain the lowest fan speed from the historical fan speeds in the previous start-stop cycle of the refrigeration fan. The operation of the refrigeration fan is controlled according to the minimum fan speed. The process continues until a cooling request from the freezer compartment is received, and then the refrigerator responds to the cooling request by obtaining the set temperature corresponding to the cooling request.

7. A refrigerator frequency converter control device, characterized in that, The refrigerator frequency converter control device includes: The response module is used to respond to the refrigerator's cooling request and obtain the set temperature corresponding to the refrigerator's cooling request. The first acquisition module is used to acquire the evaporation temperature of the refrigerator evaporator and the compartment temperature of the freezer compartment if the cooling request is a cooling request for the freezer compartment. The second acquisition module is used to determine the first speed of the refrigerator compressor and the second speed of the refrigeration fan according to a preset mapping table and a first temperature difference value between the evaporation temperature and the compartment temperature. The preset mapping table includes multiple temperature difference values ​​and the speed of the compressor and the speed of the refrigeration fan corresponding to each temperature difference value. The control module is used to control the refrigerator compressor to run at the first speed and to control the refrigeration fan to run at the second speed until the compartment temperature reaches the set temperature. The fifth acquisition module is used to acquire the ambient temperature and humidity of the environment in which the refrigerator is located; The sixth acquisition module is used to acquire the base speed corresponding to the compressor and the refrigeration fan based on the ambient temperature and the ambient humidity. The second acquisition module is further configured to: Calculate the first temperature difference between the evaporation temperature and the chamber temperature; If the first temperature difference value is less than the preset first temperature difference threshold, then the operation is based on the base speed; If the first temperature difference value is greater than the preset second temperature difference threshold, then query the preset mapping table to obtain the first speed of the refrigerator compressor and the second speed of the refrigeration fan corresponding to the first temperature difference value.

8. A refrigerator, characterized in that, The device includes a processor and a memory, the memory storing multiple instructions; the processor loads instructions from the memory to execute the refrigerator frequency conversion control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions adapted for loading by a processor to execute the refrigerator frequency conversion control method as described in any one of claims 1 to 6.

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