Defrosting control method and device of refrigerator and refrigerator

Abstract

The invention provides a defrosting control method and device of a refrigerator and the refrigerator. An evaporator of the refrigerator is provided with multiple sets of defrosting heating elements, the multiple sets of defrosting heating elements are sequentially arranged in the direction perpendicular to the air supply direction, and the air supply downstream of the evaporator area where each set of defrosting heating element is located is provided with an air speed detection device. The defrosting control method comprises the steps that the initial air speed value of each air speed detection device and the defrosting duration of last defrosting of each evaporator area after defrosting of the evaporators is finished are obtained; comparing the initial wind speed value with the reference wind speed of the corresponding wind speed detection device; the defrosting duration of last defrosting of the corresponding evaporator areas is corrected, and the set defrosting duration corresponding to the multiple evaporator areas is obtained; whether the evaporator meets the defrosting starting condition or not is judged, and if yes, multiple sets of defrosting heating elements are started; and after the defrosting duration corresponding to the operation of each group of defrosting heating elements is set, closing is carried out. By means of the method, accurate defrosting of different evaporator areas can be achieved.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and in particular to a defrosting control method, control device, and refrigerator. Background Technology

[0002] Currently, some refrigerators use steel tube heaters or quartz tube heaters. These two types of heaters are placed at the bottom of the evaporator, resulting in low heat transfer efficiency during defrosting and wasted energy. Other refrigerators use aluminum tube heaters, which are coiled around the evaporator and can achieve better heat transfer, but cannot perform precise defrosting of the evaporator. In addition, general defrosting solutions also use timed defrosting. This type of defrosting cannot dynamically defrost according to the amount of frost on the evaporator, resulting in situations where severe frost buildup leads to untimely defrosting and affects the refrigerator's cooling performance. There are also cases where the amount of frost on the evaporator is not much, but the defrosting program is still executed, which will also waste energy. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a defrosting control method, control device and refrigerator for a refrigerator that overcomes or at least partially solves the above problems.

[0004] One objective of this invention is to achieve precise defrosting of the evaporator area.

[0005] A further objective of this invention is to avoid energy waste.

[0006] Another further objective of the present invention is to avoid the freezer temperature from rising due to excessively long defrosting time.

[0007] Specifically, the present invention provides a defrosting control method for a refrigerator, wherein the evaporator of the refrigerator is arranged with multiple sets of defrosting heating elements, the multiple sets of defrosting heating elements are arranged sequentially along the direction perpendicular to the air supply direction, and a wind speed detection device is respectively installed downstream of the air supply in the evaporator area where each set of defrosting heating elements is located; and the defrosting control method includes:

[0008] After the evaporator defrost is completed, obtain the initial wind speed value of each wind speed detection device and the defrosting time of the last defrost for each evaporator area;

[0009] The initial wind speed value is compared with the preset reference wind speed of the corresponding wind speed detection device;

[0010] Based on the comparison results, the defrosting time of the previous defrosting in the corresponding evaporator area is adjusted to obtain the set defrosting time for multiple evaporator areas;

[0011] Determine if the evaporator meets the defrosting start conditions; if so, start multiple sets of defrosting heating elements.

[0012] The defrosting heating elements are turned off after running for the corresponding set defrosting time.

[0013] Optionally, the steps for determining whether the evaporator meets the defrosting start conditions include:

[0014] Obtain the real-time wind speed value for each wind speed detection device;

[0015] Determine whether the average value of each real-time wind speed is less than a preset threshold;

[0016] If the average value is less than the preset threshold, the evaporator is determined to have met the defrosting start conditions.

[0017] Optionally, the step of determining whether the evaporator meets the defrosting start conditions also includes:

[0018] Obtain the real-time wind speed value for each wind speed detection device;

[0019] Determine whether the real-time wind speed value of the wind speed detection device is less than a preset threshold;

[0020] If the real-time wind speed value of the wind speed detection device is less than the preset threshold, it is determined that the evaporator area corresponding to the wind speed detection device has reached the defrosting start condition.

[0021] If all evaporator areas corresponding to all wind speed detection devices meet the defrosting start conditions, the evaporator is determined to have met the defrosting start conditions.

[0022] Optionally, the step of correcting the defrosting time of the previous defrosting for the corresponding evaporator area based on the comparison results includes:

[0023] If the initial wind speed value corresponding to the wind speed detection device is less than the reference wind speed, extend the defrosting time of the last defrosting of the evaporator area corresponding to the wind speed detection device to obtain the set defrosting time corresponding to the evaporator area.

[0024] Optionally, the step of extending the defrosting time of the evaporator area corresponding to the wind speed detection device includes: substituting the initial wind speed value and the reference wind speed into a preset formula to calculate the defrosting time that needs to be extended;

[0025] The default formula is: t = (1 - c / a) * n;

[0026] Where t represents the defrosting time that should be increased, in minutes, c represents the initial wind speed, a represents the reference wind speed, and n represents the defrosting time coefficient.

[0027] Optionally, the step of correcting the defrosting time of the previous defrosting for the corresponding evaporator area based on the comparison results includes:

[0028] If the initial wind speed value corresponding to the wind speed detection device is equal to the reference wind speed, shorten the defrosting time of the last defrosting of the evaporator area corresponding to the wind speed detection device to obtain the set defrosting time corresponding to the evaporator area.

[0029] Optionally, before obtaining the initial wind speed value of each wind speed detection device after the evaporator defrost is completed and the defrosting duration of the last defrost for each evaporator zone, the method further includes:

[0030] Determine if the refrigerator has already undergone defrosting;

[0031] If not, obtain the real-time wind speed value for each wind speed detection device;

[0032] Determine whether the evaporator meets the defrosting start conditions based on the reference wind speed and each real-time wind speed value;

[0033] If so, the first defrosting time for the evaporator area corresponding to each wind speed detection device is determined based on the real-time wind speed value of each wind speed detection device.

[0034] Activate multiple sets of defrosting heating elements;

[0035] The defrosting heating elements in each group are turned off after the corresponding first defrosting time has elapsed.

[0036] Perform the steps of obtaining the initial wind speed value of each wind speed detection device after the evaporator defrost is completed and the defrosting duration of the last defrost for each evaporator area.

[0037] Optionally, the step of determining the initial defrosting time for the evaporator area corresponding to each wind speed detection device based on the real-time wind speed value of each wind speed detection device includes:

[0038] The initial defrosting time for the evaporator area corresponding to the wind speed detection device is determined based on the numerical relationship between the real-time wind speed value of the wind speed detection device and the reference wind speed.

[0039] According to another aspect of the present invention, a control device is also provided, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of the defrosting control method for a refrigerator according to any of the above-described embodiments.

[0040] According to another aspect of the present invention, a refrigerator is also provided, comprising:

[0041] Multiple sets of defrosting heating elements are arranged sequentially along the direction perpendicular to the air supply for controlled defrosting.

[0042] Multiple sets of wind speed detection devices are set downstream of the air supply in the evaporator area where each set of defrosting heating elements is located, to obtain the wind speed in the evaporator area where the defrosting heating elements are located.

[0043] A control device, connected to a wind speed detection device and a defrosting heating element, includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of the defrosting control method for the refrigerator described above.

[0044] The defrosting control method for a refrigerator of the present invention includes arranging multiple sets of defrosting heating elements on the evaporator of the refrigerator. The multiple sets of defrosting heating elements are arranged sequentially along the direction perpendicular to the air supply direction, and a wind speed detection device is respectively arranged downstream of the air supply of the evaporator area where each set of defrosting heating elements is located. The defrosting control method includes: obtaining the initial wind speed value of each wind speed detection device after the evaporator defrosts and the defrosting duration of the previous defrosting in each evaporator area; comparing the initial wind speed value with the preset reference wind speed of the corresponding wind speed detection device; correcting the defrosting duration of the previous defrosting in the corresponding evaporator area according to the comparison result to obtain the set defrosting duration corresponding to multiple evaporator areas; determining whether the evaporator meets the defrosting start conditions, and if so, starting the multiple sets of defrosting heating elements; and turning off each set of defrosting heating elements after running for the corresponding set defrosting duration. This method allows for the determination of defrosting level based on the initial airflow speed after the refrigerator has finished defrosting, and the defrosting time for the corresponding evaporator area can be adjusted according to the initial airflow speed. This enables precise defrosting of different evaporator areas, avoids energy waste, and also prevents the freezer temperature from rising due to excessive defrosting time.

[0045] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0046] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0047] Figure 1 This is a schematic diagram of a modified defrosting control method for a refrigerator according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the first defrosting process of a refrigerator defrosting control method according to an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of the execution flow of a defrosting control method for a refrigerator according to another embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of a control device according to an embodiment of the present invention; and

[0051] Figure 5 This is a schematic diagram of a refrigerator according to an embodiment of the present invention. Detailed Implementation

[0052] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0053] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0054] Current air-cooled refrigerators generally use temperature sensors to control the defrosting process or adopt a fixed defrosting cycle. This defrosting method cannot accurately defrost based on the amount of frost, resulting in energy waste and increased freezer temperature due to longer defrosting time.

[0055] To address the above problems, this invention provides a defrosting control method for a refrigerator. Figure 1 This is a schematic diagram of a modified defrosting control method for a refrigerator according to an embodiment of the present invention, as shown below. Figure 1 As shown, the defrosting control method of the refrigerator includes at least the following steps S101 to S105.

[0056] First, in some optional embodiments, the refrigerator of this method has multiple sets of defrosting heating elements arranged on its evaporator. These multiple sets of defrosting heating elements are generally arranged sequentially along the direction perpendicular to the airflow direction, and a wind speed detection device is respectively installed downstream of the airflow in the evaporator area where each set of defrosting heating elements is located. That is, each set of defrosting heating elements corresponds to a wind speed detection device, and the wind speed detection device is specifically used to detect the wind speed in the evaporator area where its corresponding defrosting heating element is located. An optional example of the wind speed detection device is a wind speed sensor; those skilled in the art can choose a specific wind speed detection device. This arrangement allows the wind speed passing through its corresponding evaporator area to be obtained by the wind speed detection device. Since frost can form on the evaporator, this frost will affect the wind speed measured by the wind speed detection device. This method allows the wind speed detection device to determine the degree of frost in the evaporator area corresponding to the wind speed detection device, so that the defrosting control method of this invention can accurately adjust the defrosting time for different evaporator areas. It should be noted that although the defrosting heating element and the wind speed detection device of the present invention correspond one-to-one, their specific number is not limited. Those skilled in the art can determine the number and specific setting of the defrosting heating element according to the actual situation of the evaporator. The corresponding wind speed detection device can also be set according to the actual situation of the refrigerator.

[0057] Step S101: Obtain the initial wind speed value of each wind speed detection device after the evaporator defrosts and the defrosting duration of the previous defrost for each evaporator zone. The initial wind speed value refers to the wind speed at which the refrigerator's refrigeration system begins normal operation after the evaporator defrosts but before it re-frosts. The obtained initial wind speed value clearly reflects the defrosting result of the previous defrost for each evaporator zone.

[0058] Step S102: Compare the initial wind speed value with the preset reference wind speed of the corresponding wind speed detection device. In some optional embodiments, the reference wind speed refers to the wind speed at which the refrigerator's refrigeration system operates normally when the evaporator is not yet frosted. Those skilled in the art can adjust the reference wind speed according to the actual situation during the use of the refrigerator. The purpose of comparing the initial wind speed value with the preset reference wind speed of the corresponding wind speed detection device is to determine whether the evaporator can reach the reference wind speed state after defrosting. If the initial wind speed value is less than the reference wind speed, it means that the evaporator area corresponding to the initial wind speed value is not completely defrosted, and frost still exists in some places; if the initial wind speed value is equal to the reference wind speed, it means that the evaporator area corresponding to the initial wind speed value has been completely defrosted.

[0059] Step S103: Based on the comparison results, correct the defrosting time of the previous defrosting of the corresponding evaporator area to obtain the set defrosting time for multiple evaporator areas. After comparing the initial wind speed value with the reference wind speed in step S102, the degree of defrosting of the corresponding evaporator area can be determined. In order to ensure that the corresponding evaporator area can be completely defrosted in the next defrosting, it is necessary to correct the defrosting time of the previous defrosting of the corresponding evaporator area based on the comparison results, thereby obtaining the set defrosting time for the corresponding evaporator area.

[0060] In some optional embodiments, the step of correcting the defrosting time of the previous defrosting of the corresponding evaporator area based on the comparison result generally includes: if the initial wind speed value corresponding to the wind speed detection device is less than the reference wind speed, extending the defrosting time of the previous defrosting of the evaporator area corresponding to the wind speed detection device to obtain the set defrosting time corresponding to the evaporator area. Specifically, if the initial wind speed value is less than the reference wind speed, it indicates that the defrosting of the evaporator area corresponding to the wind speed detection device is incomplete, therefore the defrosting time of this evaporator area in the next defrosting needs to be increased, i.e., the set defrosting time corresponding to the evaporator area.

[0061] Optionally, the steps to extend the defrosting time of the evaporator area corresponding to the wind speed detection device may generally include: substituting the initial wind speed value and the reference wind speed into a preset formula to calculate the defrosting time that needs to be extended;

[0062] The default formula is: t = (1 - c / a) * n;

[0063] Where t represents the defrosting time that should be increased, in minutes, c represents the initial wind speed, a represents the reference wind speed, and n represents the defrosting time coefficient.

[0064] It should be noted that those skilled in the art can set the defrosting time coefficient n according to the actual situation. One possible example is 4, in which case the preset formula would become t=(1-c / a)*4.

[0065] In some alternative embodiments, the step of correcting the defrosting time of the previous defrosting of the corresponding evaporator area based on the comparison result may further include: shortening the defrosting time of the previous defrosting of the evaporator area corresponding to the wind speed detection device when the initial wind speed value corresponding to the wind speed detection device is equal to the reference wind speed, so as to obtain the set defrosting time corresponding to the evaporator area.

[0066] When the initial wind speed value corresponding to the wind speed detection device is equal to the reference wind speed, one scenario is that the defrosting time of the evaporator area in the previous defrosting cycle was just enough to completely defrost the evaporator area. However, a more common scenario is that the defrosting time of the evaporator area in the previous defrosting cycle exceeded the actual defrosting time required by the evaporator area. That is, the evaporator area continued to defrost for a period of time even after it had already been completely defrosted, which would cause significant energy loss. Therefore, in order to reduce energy loss, the method of this invention shortens the defrosting time of the evaporator area corresponding to the wind speed detection device in the case where the initial wind speed value is equal to the reference wind speed.

[0067] With this adjustment method, even if the evaporator area is not completely defrosted after the next defrost, the defrosting time can be increased by continuing to use the method of this invention. Through multiple cycles of adjustment, the corresponding defrosting time can be precisely set for each evaporator area, thereby ensuring complete defrosting while minimizing unnecessary energy loss.

[0068] Step S104: Determine if the defrosting conditions are met. After the evaporator has undergone the previous defrosting cycle, the initial fan speed value before frost formation is obtained, and the previous defrosting duration is adjusted to determine the set defrosting duration for each evaporator zone. Subsequently, the refrigerator will frost again during the cooling process. When a certain level of frost is reached, the defrosting conditions are met, and each evaporator zone will then be defrosted according to its corresponding set defrosting duration.

[0069] In some optional embodiments, the step of determining whether the evaporator meets the defrosting start conditions generally includes: acquiring the real-time wind speed value of each wind speed detection device; determining whether the average value of each real-time wind speed value is less than a preset threshold; and determining that the evaporator has met the defrosting start conditions if the average value is less than the preset threshold. Here, the real-time wind speed value refers to the wind speed detected by the wind speed detection device during the operation of the refrigerator's refrigeration system. Since the evaporator continuously frosts, the real-time wind speed value continuously decreases. When the average value of the real-time wind speed values ​​detected by all wind speed detection devices is less than the preset threshold, it indicates that the evaporator has accumulated too much frost, and the defrosting start conditions are met. One optional example of the preset threshold is 0.6 times the reference wind speed; those skilled in the art can set the specific value of the preset threshold according to actual conditions.

[0070] In some alternative embodiments, the step of determining whether the evaporator meets the defrosting start conditions may further include: obtaining the real-time wind speed value of each wind speed detection device; determining whether the real-time wind speed value of the wind speed detection device is less than a preset threshold; if the real-time wind speed value of the wind speed detection device is less than the preset threshold, determining that the evaporator area corresponding to the wind speed detection device has met the defrosting start conditions; if the evaporator areas corresponding to all wind speed detection devices have met the defrosting start conditions, determining that the evaporator has met the defrosting start conditions.

[0071] Step S105: If the determination in step S104 is yes, start multiple sets of defrosting heating elements.

[0072] Step S106: After each set of defrosting heating elements has run for the corresponding set defrosting time, it is turned off. When it is determined that the evaporator has met the defrosting start conditions, multiple sets of defrosting heating elements arranged on the evaporator are activated. Each set of defrosting heating elements defrosts its own evaporator area according to the set defrosting time calculated in step S103. After each set of defrosting heating elements has run for the corresponding set defrosting time, it is turned off, and then step S101 is executed again in a cycle. This process completes the defrosting of the evaporator area while avoiding excessive energy consumption.

[0073] This method allows for the determination of defrosting level based on the initial airflow speed after the refrigerator has finished defrosting, and the defrosting time for the corresponding evaporator area can be adjusted according to the initial airflow speed. This enables precise defrosting of different evaporator areas, avoids energy waste, and also prevents the freezer temperature from rising due to excessive defrosting time.

[0074] In some optional embodiments, before the steps of obtaining the initial wind speed value of each wind speed detection device after the evaporator defrosts and the defrosting duration of the previous defrost for each evaporator area, the method may generally include: determining whether the refrigerator has already performed defrost; if not, obtaining the real-time wind speed value of each wind speed detection device; determining whether the evaporator meets the defrosting start conditions based on the reference wind speed and each real-time wind speed value; if so, determining the first defrosting duration of the evaporator area corresponding to each wind speed detection device based on the real-time wind speed value of each wind speed detection device; starting multiple sets of defrosting heating elements; shutting down each set of defrosting heating elements after they have run for the corresponding first defrosting duration; and executing the steps of obtaining the initial wind speed value of each wind speed detection device after the evaporator defrosts and the defrosting duration of the previous defrost for each evaporator area. The determination of whether the refrigerator has already performed defrost is to determine whether the refrigerator is undergoing its first defrost. This is because the method of the present invention cyclically adjusts the defrosting duration based on the situation after the evaporator defrosts, thus requiring this method to determine the first defrosting duration. After the evaporator has undergone its first defrost, the cyclic adjustment method of the present invention can be implemented.

[0075] Optionally, the step of determining the initial defrosting time for the evaporator area corresponding to each wind speed detection device based on the real-time wind speed value of each device generally includes: determining the initial defrosting time for the evaporator area corresponding to the wind speed detection device based on the numerical relationship between the real-time wind speed value and the reference wind speed. One possible example of this numerical relationship is determining the initial defrosting time for the evaporator area corresponding to the wind speed detection device using the ratio of the real-time wind speed value to the reference wind speed. Specifically, the initial defrosting time can be determined according to the correspondence shown in Table 1.

[0076] Table 1

[0077]

[0078] Where 'a' represents the reference wind speed, and the defrosting time is in minutes (min), ≤0.1a means that when the real-time wind speed is less than or equal to 0.1 times the reference wind speed, the defrosting time for the corresponding evaporator area is 32 minutes, and so on. It should be noted that the correspondence in the table above is only an optional example, and those skilled in the art can adjust the specific values ​​and the specific form of the numerical relationships in Table 1 according to the actual situation.

[0079] Figure 2 This is a schematic diagram of the initial defrosting process of a refrigerator defrosting control method according to an embodiment of the present invention. Figure 2 As shown, the first defrosting process of the refrigerator includes at least the following steps S201 to S207.

[0080] Step S201: Determine whether the refrigerator has already undergone defrosting. Determining whether the refrigerator has already undergone defrosting is to ascertain whether this is the first defrosting operation. This is because the method of this invention cyclically adjusts the defrosting time based on the condition of the evaporator after defrosting; therefore, this method is needed to determine the initial defrosting time. Once the evaporator has undergone its first defrosting, the cyclic adjustment method of this invention can be implemented.

[0081] Step S202: If the determination in step S201 is negative, obtain the real-time wind speed value of each wind speed detection device.

[0082] Step S203: Determine whether the defrosting start condition is met. In some optional embodiments, the step of determining whether the defrosting start condition is met generally includes: obtaining the real-time wind speed value of each wind speed detection device; determining whether the average value of each real-time wind speed value is less than a preset threshold; and determining that the evaporator has reached the defrosting start condition if the average value is less than the preset threshold. The real-time wind speed value refers to the wind speed value that continuously decreases during the operation of the refrigerator's refrigeration system due to continuous frost buildup. When the average value of the real-time wind speed values ​​detected by all wind speed detection devices is less than the preset threshold, it indicates that the evaporator has excessive frost buildup, and the defrosting start condition is met. One optional example of the preset threshold is 0.6 times the reference wind speed; those skilled in the art can set the specific value of the preset threshold according to actual conditions.

[0083] In some alternative embodiments, the step of determining whether the defrosting start-up conditions are met may further include: obtaining the real-time wind speed value of each wind speed detection device; determining whether the real-time wind speed value of the wind speed detection device is less than a preset threshold; if the real-time wind speed value of the wind speed detection device is less than the preset threshold, determining that the evaporator area corresponding to the wind speed detection device has met the defrosting start-up conditions; if the evaporator areas corresponding to all wind speed detection devices have met the defrosting start-up conditions, determining that the evaporator has met the defrosting start-up conditions.

[0084] Step S204: If the determination in step S203 is negative, determine the first defrosting time of the evaporator area corresponding to each wind speed detection device based on the real-time wind speed value of each wind speed detection device.

[0085] Step S205: Activate multiple sets of defrosting heating elements.

[0086] Step S206: After each group of defrosting heating elements has run for the corresponding first defrosting time, it is turned off.

[0087] Step S207: Execute the steps of obtaining the initial wind speed value of each wind speed detection device after the evaporator defrost is completed and the defrosting duration of the last defrost in each evaporator area.

[0088] This method can determine the first defrosting time for different evaporator zones based on the actual usage status of the refrigerator, i.e., the real-time fan speed value. After the evaporator has undergone the first defrosting, the cyclic adjustment method of the present invention can be implemented.

[0089] Figure 3 This is a schematic diagram illustrating the execution flow of a defrosting control method for a refrigerator according to another embodiment of the present invention. Figure 3 As shown, the defrosting process of the refrigerator includes at least the following steps S301 to S307.

[0090] Step S301, initial power-on of the refrigerator. In this embodiment, initial power-on of the refrigerator refers to the first normal use of the refrigerator without defrosting.

[0091] Step S302: Determine whether the defrosting conditions are met based on the real-time wind speed and reference wind speed during operation.

[0092] Step S303: If the determination in step S302 is yes, defrosting is performed for the first time, and the defrosting time for each evaporator area is determined.

[0093] Step S304: After defrosting is complete, obtain the initial fan speed value and the defrosting duration of the previous defrost, and compare the initial fan speed with the reference fan speed. After step S303 is completed, the evaporator has undergone its first defrosting, and the step of cyclically adjusting the defrosting duration can then be performed. The initial fan speed value refers to the fan speed at which the refrigerator's cooling system begins normal operation after the evaporator has finished defrosting but before it re-frosts. The reference fan speed refers to the fan speed at which the refrigerator's cooling system operates normally before the evaporator frosts.

[0094] Step S305: Based on the comparison results, correct the previous defrosting time to obtain the set defrosting time for this defrosting.

[0095] Step S306: Determine whether the defrosting conditions are met based on the real-time wind speed and reference wind speed during operation. The real-time wind speed refers to the wind speed detected by the wind speed detection device during the operation of the refrigerator's refrigeration system.

[0096] In step S307, if the determination in step S307 is yes, defrosting is performed according to the modified defrosting time setting. After step S307 is completed, step S304 is executed repeatedly.

[0097] This method allows for the determination of defrosting level based on the initial airflow speed after the refrigerator has finished defrosting, and the defrosting time for the corresponding evaporator area can be adjusted according to the initial airflow speed. This enables precise defrosting of different evaporator areas, avoids energy waste, and also prevents the freezer temperature from rising due to excessive defrosting time.

[0098] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be performed in any particular order, or that all operations of the method are included in every case. Furthermore, the method may include additional operations. Within the scope of the technical concept provided by the method in this embodiment, additional variations can be made to the above method.

[0099] It should be understood that in some embodiments, the components may be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods may be implemented using software or firmware stored in memory and executed by a suitable instruction execution system.

[0100] This embodiment also provides a computer program product 10 and a control device 20. Figure 4 This is a schematic diagram of a control device according to an embodiment of the present invention. The control device 20 includes a memory 21, a processor 22, and a computer program 10 stored in the memory 21 and running on the processor 22. When the processor 22 executes the computer program 10, it implements the steps of the defrosting control method of the refrigerator according to any of the above embodiments.

[0101] In addition, this embodiment also provides a refrigerator. Figure 5 This is a schematic diagram of a refrigerator according to an embodiment of the present invention. The refrigerator includes an evaporator 40, on which multiple sets of defrosting heating elements are sequentially arranged along the direction perpendicular to the airflow. In this embodiment, three sets are selected: defrosting heating element 51, defrosting heating element 52, and defrosting heating element 53. The three sets of defrosting heating elements divide the evaporator into three evaporator areas, and each set of defrosting heating elements is installed on both the front and back of its corresponding evaporator area, thereby completing the defrosting work of its corresponding evaporator area. Those skilled in the art can set the number and installation position of the defrosting heating elements according to actual conditions.

[0102] A wind speed detection device is installed downstream of the air supply in the evaporator area where each set of defrosting heating elements is located. In this embodiment, it is installed at the top of each evaporator area, from... Figure 5 As can be seen, a wind speed detection device 61 is installed at the top of the evaporator area where the defrosting heating element 51 is located. A wind speed detection device 61 is also installed at the top of the evaporator area where the defrosting heating element 52 is located, and a wind speed detection device 61 is installed at the top of the evaporator area where the defrosting heating element 53 is located. It should be noted that those skilled in the art can determine the location of the wind speed detection device based on the actual installation status of the evaporator and the actual wind direction, enabling it to detect the wind speed passing through the evaporator area.

[0103] In addition, the refrigerator 30 is also equipped with a control device 20, which is connected to a fan speed detection device and a defrost heating element, respectively, thereby controlling the fan speed detection device to detect the fan speed and controlling the start and stop of the defrost operation of the defrost heating element. Furthermore, the control device 20 can implement the steps of the defrost control method of the refrigerator in any of the above embodiments, thereby achieving precise defrosting of different areas on the evaporator 40 in the refrigerator 30.

[0104] The computer program 11 used to perform the operations of this invention may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, integrated circuit configuration data, or source code or object code written in any combination of one or more programming languages ​​and procedural programming languages. The computer program 10 may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer via any type of network, including a Local Area Network (LAN) or Wide Area Network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, to perform aspects of this invention, electronic circuits, including, for example, programmable logic circuits, Field-Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), may execute computer-readable program instructions to personalize the electronic circuits by utilizing status information of the computer-readable program instructions.

[0105] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A defrosting control method for a refrigerator, wherein the evaporator of the refrigerator is arranged with multiple sets of defrosting heating elements, the multiple sets of defrosting heating elements are arranged sequentially along the direction perpendicular to the air supply direction, and a wind speed detection device is respectively installed downstream of the air supply in the evaporator area where each set of defrosting heating elements is located, and the defrosting control method includes: After the defrosting of the evaporator is completed, obtain the initial wind speed value of each wind speed detection device and the defrosting duration of the last defrosting in each evaporator area; The initial wind speed value is compared with the preset reference wind speed corresponding to the wind speed detection device; Based on the comparison results, the defrosting time of the previous defrosting for the corresponding evaporator area is adjusted to obtain the set defrosting time for multiple evaporator areas; Determine whether the evaporator meets the defrosting start conditions; if so, activate multiple sets of the defrosting heating elements. The defrosting heating elements in each group are turned off after running for the set defrosting time.

2. The defrosting control method for a refrigerator according to claim 1, wherein, The step of determining whether the evaporator meets the defrosting start conditions includes: Obtain the real-time wind speed value for each of the wind speed detection devices; Determine whether the average value of each of the real-time wind speed values ​​is less than a preset threshold; If the average value is less than the preset threshold, the evaporator is determined to have met the defrosting start condition.

3. The defrosting control method for a refrigerator according to claim 1, wherein, The step of determining whether the evaporator meets the defrosting start conditions also includes: Obtain the real-time wind speed value for each of the wind speed detection devices; Determine whether the real-time wind speed value of the wind speed detection device is less than a preset threshold; If the real-time wind speed value of the wind speed detection device is less than the preset threshold, it is determined that the evaporator area corresponding to the wind speed detection device has reached the defrosting start condition. If all the evaporator areas corresponding to the wind speed detection devices meet the defrosting start conditions, it is determined that the evaporator has met the defrosting start conditions.

4. The defrosting control method for a refrigerator according to claim 1, wherein, The step of correcting the defrosting time of the previous defrosting for the corresponding evaporator region based on the comparison result includes: If the initial wind speed value corresponding to the wind speed detection device is less than the reference wind speed, the defrosting time of the last defrosting of the evaporator area corresponding to the wind speed detection device is extended to obtain the set defrosting time corresponding to the evaporator area.

5. The defrosting control method for a refrigerator according to claim 4, wherein, The step of extending the defrosting time of the evaporator area corresponding to the wind speed detection device includes: substituting the initial wind speed value and the reference wind speed into a preset formula to calculate the defrosting time that needs to be extended; The preset formula is: t = (1 - c / a) * n; Wherein, t represents the defrosting time that should be increased, in minutes, c represents the initial wind speed, a represents the reference wind speed, and n represents the defrosting time coefficient.

6. The defrosting control method for a refrigerator according to claim 1, wherein, The step of correcting the defrosting time of the previous defrosting for the corresponding evaporator region based on the comparison result includes: When the initial wind speed value corresponding to the wind speed detection device is equal to the reference wind speed, the defrosting time of the last defrosting of the evaporator area corresponding to the wind speed detection device is shortened to obtain the set defrosting time corresponding to the evaporator area.

7. The defrosting control method for a refrigerator according to claim 1, wherein, Before the steps of obtaining the initial wind speed value of each wind speed detection device after the evaporator defrost is completed and the defrosting time of the last defrost in each evaporator area, the method further includes: Determine whether the refrigerator has already undergone defrosting; If not, then obtain the real-time wind speed value of each of the wind speed detection devices; Based on the reference wind speed and each of the real-time wind speed values, determine whether the evaporator meets the defrosting start conditions; If so, the first defrosting time of the evaporator area corresponding to each wind speed detection device is determined based on the real-time wind speed value of each wind speed detection device. Activate the multiple sets of defrosting heating elements; The defrosting heating elements in each group are turned off after operating for the corresponding first defrosting time. Perform the steps of obtaining the initial wind speed value of each wind speed detection device after the defrosting of the evaporator is completed and the defrosting time of the last defrosting of each evaporator area.

8. The defrosting control method for a refrigerator according to claim 7, wherein, The step of determining the first defrosting time of the evaporator area corresponding to each wind speed detection device based on the real-time wind speed value of each wind speed detection device includes: The first defrosting time of the evaporator area corresponding to the wind speed detection device is determined based on the numerical relationship between the real-time wind speed value of the wind speed detection device and the reference wind speed.

9. A control device, characterized in that, The refrigerator includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of the defrosting control method for a refrigerator according to any one of claims 1 to 8.

10. A refrigerator, characterized in that, include: Multiple sets of defrosting heating elements are arranged sequentially along the direction perpendicular to the air supply direction for controlled defrosting. Multiple sets of wind speed detection devices are set downstream of the air supply in the evaporator area where each set of defrosting heating elements is located, to obtain the wind speed in the evaporator area where the defrosting heating elements are located. A control device, connected to the wind speed detection device and the defrosting heating element, includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the steps of the defrosting control method for a refrigerator according to any one of claims 1 to 8.

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