Control method of refrigerator, refrigerator, and computer storage medium

Abstract

The application provides a refrigerator control method, a refrigerator and a computer storage medium. The control method comprises: determining a current rotating speed and a target rotating speed of a condensing fan; calculating a difference value between the current rotating speed and the target rotating speed; and controlling the compressor to work based on the difference value. In this way, the application can improve the problem of high temperature of the compressor caused by poor condensing heat dissipation of the refrigerator, thereby reducing the safety problem caused by high temperature of the compressor.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to a refrigerator control method, a refrigerator, and a computer storage medium. Background Technology

[0002] Existing refrigerators, such as large-capacity refrigerators and built-in kitchen refrigerators, are mostly equipped with condenser fans to achieve forced convection cooling of the condenser. When the actual speed of the condenser fan decreases, the heat dissipation effect on the condenser will deteriorate, and the heat dissipation performance of the refrigerator's compressor compartment will also deteriorate. This will cause the compressor temperature to become too high, and long-term operation may cause problems such as discoloration and deformation of the user's floor, and may even lead to safety accidents.

[0003] Currently, in order to improve the cooling effect of condensation and maintain the temperature of the compressor, the speed of the condenser fan is usually controlled by monitoring the operating power of the compressor.

[0004] However, the inventors of this application discovered that refrigerators operate under complex conditions, and the compressor's operating power and surface temperature do not change proportionally. For example, in high-temperature environments, when the condenser's heat dissipation is extremely poor, the compressor's temperature will rise rapidly after startup, but the compressor's operating power will not increase significantly. Therefore, the above-mentioned solution cannot effectively solve the safety problem caused by the high compressor temperature due to poor condenser heat dissipation. Summary of the Invention

[0005] This application provides a refrigerator and its control method, a refrigerator and a computer storage medium to improve the problem of high compressor temperature caused by poor condensation heat dissipation in the refrigerator, thereby reducing the safety problems caused by high compressor temperature.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a control method for a refrigerator. The refrigerator includes a condenser fan and a compressor, and the control method includes: determining the current speed and target speed of the condenser fan; calculating the difference between the current speed and the target speed; and controlling the compressor to work based on the difference.

[0007] The above-mentioned compressor operation based on difference control includes: determining the current heat dissipation condition based on the difference; and controlling the compressor operation using a control strategy corresponding to the current heat dissipation condition.

[0008] The above-mentioned determination of the current heat dissipation condition based on the difference includes: in response to the difference being within a first difference range, determining the current heat dissipation condition as a normal heat dissipation condition; in response to the difference being within a second difference range, determining the current heat dissipation condition as a condition with slight degradation of heat dissipation performance; in response to the difference being within a third difference range, determining the current heat dissipation condition as a condition with severe degradation of heat dissipation performance; wherein the second difference range is greater than the first difference range and less than the third difference range.

[0009] The above-mentioned control strategy for the compressor to operate using the control strategy corresponding to the current heat dissipation condition includes: in response to the current heat dissipation condition being a normal heat dissipation condition, controlling the compressor to continue operating at the current speed.

[0010] The above-mentioned control strategy for the compressor to operate using the control strategy corresponding to the current heat dissipation condition also includes: in response to the current heat dissipation condition being a condition of slight degradation in heat dissipation performance, controlling the compressor to reduce its speed to a first speed by a first magnitude.

[0011] The above-mentioned control strategy for the compressor to operate using the control strategy corresponding to the current heat dissipation condition further includes: in response to the current heat dissipation condition being a condition of severe heat dissipation performance degradation, controlling the compressor to operate at a reduced speed, and periodically executing the following sub-steps within a first duration: controlling the compressor to run at a second speed for a second duration; controlling the compressor to stop operating for a third duration; wherein the first duration is greater than or equal to the sum of the second duration and the third duration, and the second magnitude of the speed reduction is greater than the first magnitude.

[0012] The above-mentioned determination of the current heat dissipation condition based on the difference also includes: determining the first difference interval, the second difference interval, and the third difference interval based on the ambient temperature.

[0013] The determination of the first, second, and third difference intervals based on ambient temperature includes: determining the first, second, and third difference intervals based on a first interval division point and a second interval division point in response to the ambient temperature being within the first temperature interval; determining the first, second, and third difference intervals based on a third interval division point and a fourth interval division point in response to the ambient temperature being within the second temperature interval; and determining the first, second, and third difference intervals based on a fifth interval division point and a sixth interval division point in response to the ambient temperature being within the third temperature interval; wherein the third interval division point is located between the first and fifth interval division points, the second interval division point is less than or equal to the fourth interval division point, and the sixth interval division point is less than the fourth interval division point; the second temperature interval is higher than the first temperature interval and lower than the third temperature interval.

[0014] Wherein, the first amplitude corresponding to the second temperature range is greater than the first amplitude corresponding to the first temperature range and less than the first amplitude corresponding to the third temperature range; and / or the second amplitude corresponding to the second temperature range is greater than the second amplitude corresponding to the first temperature range and less than the second amplitude corresponding to the third temperature range; the second duration corresponding to the second temperature range is less than the second duration corresponding to the first temperature range and greater than the second duration corresponding to the third temperature range; the third duration corresponding to the second temperature range is greater than the third duration corresponding to the first temperature range and less than the third duration corresponding to the third temperature range.

[0015] The calculation of the difference between the current speed and the target speed includes: calculating the difference between the current speed and the target speed obtained multiple times within the fourth time period; and obtaining the difference with the highest percentage.

[0016] Among them, the fourth duration is inversely correlated with ambient temperature.

[0017] Prior to determining the current and target speeds of the condenser fan, the process further includes: acquiring the ambient temperature; and performing the steps of determining the current and target speeds of the condenser fan if the ambient temperature is greater than or equal to a low-temperature threshold.

[0018] The aforementioned control method also includes: adjusting the current speed of the fan based on the difference to reduce the difference.

[0019] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a refrigerator. The refrigerator includes: a compressor; a condenser connected to the compressor via a pipe; a condenser fan configured to dissipate heat from the condenser; and a controller connected to the compressor and the condenser fan, used to control the operation of the compressor and the condenser fan using the aforementioned control method.

[0020] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a computer storage medium. This computer storage medium stores program instructions, which are executed by a processor to implement the above-mentioned control method.

[0021] The beneficial effects of this application are as follows: The refrigerator control method provided by this application can calculate the difference between the current speed and the target speed of the condenser fan, i.e., the speed deviation of the condenser fan, and control the compressor operation based on this difference. Since the speed deviation of the condenser fan directly affects the heat dissipation effect of the refrigerator's condenser, and the quality of the condenser's heat dissipation directly affects the compressor temperature, this application controls the compressor operation based on the speed deviation of the condenser fan, allowing the compressor temperature to be appropriately adjusted. For example, when the speed deviation of the condenser fan is large, the heat dissipation effect is greatly weakened or even lost. If the compressor continues to operate according to its original rules, it will reach a high temperature state in a short time. If the user does not perceive the refrigerator malfunction in time, it could lead to floor deformation or even a fire in the refrigerator's compressor compartment due to high temperature. Using this application, in such cases, the user can judge the situation by sensing the actual operating speed difference of the condenser fan. When the speed deviation of the condenser fan is large, the compressor speed can be reduced in time and the compressor can be operated according to a certain on-off time to reduce the compressor temperature. During this operation, the user can detect abnormal refrigerator cooling and report it to after-sales service, ensuring the refrigerator operates safely and receives repairs, thus avoiding safety accidents and protecting consumer property. Therefore, this application can improve the problem of high compressor temperature caused by poor condenser heat dissipation in refrigerators, thereby reducing safety issues caused by high compressor temperature. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of this application;

[0024] Figure 2 This is a flowchart illustrating an embodiment of the refrigerator control method of this application;

[0025] Figure 3 yes Figure 2 A detailed flowchart of step S12 in the embodiment;

[0026] Figure 4 yes Figure 2 A detailed flowchart of step S13 in the embodiment;

[0027] Figure 5 yes Figure 4 A schematic diagram of a specific process for step S31 in the embodiment;

[0028] Figure 6 This is a flowchart illustrating another embodiment of the refrigerator control method of this application;

[0029] Figure 7 This is a schematic diagram of the structure of an embodiment of the computer storage medium of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0033] This application first proposes a refrigerator, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of this application. The refrigerator of this embodiment (not shown) includes: a compressor 11, a condenser 12, a capillary tube 13, an evaporator 14, and a condenser fan 15. The compressor 11 is connected to the evaporator 14 and the condenser 12 via pipelines. The compressor 11 is the power source of the refrigerator and is used to adiabatically compress the low-temperature, low-pressure dry saturated refrigerant vapor from the evaporator 14 into high-temperature, high-pressure superheated vapor, which is then supplied to the condenser 12. The condenser 12 is also connected to the capillary tube 13, which is used to condense the high-temperature, high-pressure superheated vapor from the compressor 11 under isobaric conditions, dissipating heat to the surrounding environment and becoming a high-pressure subcooled liquid. The capillary tube 13 is also connected to the evaporator 14. After the high-pressure subcooled liquid in the capillary tube is throttled by the capillary tube 13, it becomes low-temperature, low-pressure refrigerant vapor and enters the evaporator 14 for evaporation. The low-temperature, low-pressure wet refrigerant vapor after being throttled by the capillary tube 13 boils in the evaporator 14 under isobaric conditions, absorbing heat from the surrounding environment and becoming low-temperature, low-pressure dry saturated refrigerant vapor, which is then supplied to the compressor 11.

[0034] Furthermore, the refrigerator also includes a controller 16, which is connected to the compressor 11 and the condenser fan 15 respectively, and controls the operation of the compressor 11 and the condenser fan 15.

[0035] Specifically, the controller 16 can use the control methods described below to control the operation of the compressor 11, condenser fan 15, etc.

[0036] Optionally, in this embodiment, the condenser fan 15 and the controller 16 can be connected via a drive line and a speed feedback line. The controller 16 controls the operation of the condenser fan 15 via the drive line, and the controller 16 obtains the current speed of the condenser fan 15 via the speed feedback line.

[0037] Optionally, the refrigerator also includes a temperature sensor 17 connected to the controller 16 for collecting the ambient temperature of the refrigerator. The controller 16 obtains the ambient temperature of the refrigerator from the temperature sensor 17.

[0038] This application further proposes a method for controlling a refrigerator, such as... Figure 2 As shown, Figure 2 This is a flowchart illustrating an embodiment of the control method for a refrigerator according to this application. The control method of this embodiment can be used in the aforementioned refrigerator and may specifically include the following steps:

[0039] Step S11: Determine the current speed and target speed of the condenser fan.

[0040] The current speed of the condenser fan refers to the actual operating speed of the condenser fan; the target speed of the condenser fan refers to the preset given speed that matches the current operating conditions of the refrigerator.

[0041] Optionally, the target speed of the condenser fan can be set based on the ambient temperature of the refrigerator and the speed of the compressor.

[0042] The controller determines the current and target speed of the condenser fan. The target speed can be stored in the controller, which can first obtain the current speed of the condenser fan through speed feedback connected to the condenser fan.

[0043] Step S12: Calculate the difference between the current speed and the target speed.

[0044] The controller calculates the difference between the current speed of the condenser fan and the preset target speed, which is used as the current speed deviation of the condenser fan. This speed deviation reflects the performance of condenser heat dissipation.

[0045] Optionally, this embodiment can be achieved through, as follows: Figure 3 The method shown implements step S12. The method in this embodiment includes steps S21 and S22.

[0046] Step S21: Calculate the difference between the current rotation speed and the target rotation speed obtained multiple times within the fourth time period.

[0047] The controller acquires the current speed of the condenser fan multiple times within the fourth time period, obtains multiple current speeds, and acquires the difference between each current speed and the target speed.

[0048] If the refrigerator's operating conditions change within the fourth time period, the controller calculates the difference between the current speed and the target speed corresponding to the operating conditions at the time the current speed was collected.

[0049] The fourth duration can be 200-10 minutes, for example, 200 minutes, 180 minutes, 120 minutes, 60 minutes, 30 minutes, and 10 minutes.

[0050] Step S22: Obtain the difference with the highest percentage.

[0051] The controller obtains the difference with the highest percentage.

[0052] Specifically, the controller calculates the percentage of each different difference among all differences and uses the difference with the highest percentage as the difference for the condenser fan.

[0053] This embodiment uses the difference of the highest percentage within the duration as the final difference, which can improve the misjudgment problem caused by fluctuations and other reasons, and improve the anti-interference ability of the difference calculation.

[0054] Optionally, the fourth duration in this embodiment is inversely correlated with the ambient temperature.

[0055] The higher the ambient temperature, the shorter the fourth duration, in order to increase the frequency of the controller's control over the compressor and improve safety; the lower the ambient temperature, the longer the fourth duration, in order to decrease the frequency of the controller's control over the compressor and ensure the compressor's cooling capacity.

[0056] Step S13: Control the compressor operation based on the difference.

[0057] The controller controls the compressor's operation based on the difference between the current speed of the condenser fan and the target speed.

[0058] Since the speed deviation of the condenser fan directly affects the heat dissipation effect of the refrigerator's condenser, and the quality of the condenser's heat dissipation directly affects the compressor temperature, this embodiment controls the compressor's operation based on the condenser fan speed deviation. This allows for appropriate temperature adjustment of the compressor; for example, when the condenser fan speed deviation is large, the compressor speed can be reduced to lower the compressor temperature. Therefore, this embodiment can improve the problem of high compressor temperature caused by poor condenser heat dissipation in the refrigerator, thereby reducing the safety issues caused by high compressor temperature.

[0059] For example, when the condenser fan speed deviates significantly, its heat dissipation effect is greatly weakened or even lost. If the compressor continues to operate according to its original rules, it will reach a high temperature in a short time. If the user does not notice the refrigerator malfunction in time, it may lead to floor deformation or even a fire in the refrigerator compressor compartment. However, this application can detect the difference in the actual operating speed of the condenser fan in this situation and make a judgment. When the condenser fan speed deviates significantly, the compressor speed can be reduced in time and the compressor can be operated according to a certain start-stop time to reduce the compressor temperature. During this operation, the user can find the refrigerator cooling abnormality and report it to after-sales service. The refrigerator can operate safely and be repaired, thus avoiding safety accidents and protecting the safety of consumers' property.

[0060] Optionally, this embodiment can be achieved through, as follows: Figure 4 The method shown implements step S13. The method in this embodiment includes steps S31 and S32.

[0061] Step S31: Determine the current heat dissipation condition based on the difference.

[0062] The controller determines the current heat dissipation condition of the condenser based on the difference between the current speed of the condenser fan and the target speed, thereby determining the current heat dissipation condition of the compressor.

[0063] Alternatively, this embodiment can determine the current heat dissipation conditions using the following method:

[0064] Specifically, the controller pre-stores multiple difference ranges and establishes a mapping relationship between multiple heat dissipation conditions and multiple difference ranges. The controller can first determine the difference range in which the difference lies, and then determine the heat dissipation condition corresponding to the difference range based on the mapping relationship.

[0065] The current heat dissipation conditions can include: normal heat dissipation conditions, slightly degraded heat dissipation conditions, and severely degraded heat dissipation conditions; the difference range can include a first difference range, a second difference range, and a third difference range; the second difference range is greater than the first difference range and less than the third difference range, that is, the second difference range is located between the first difference range and the third difference range, and the difference in the second difference range is greater than the difference in the first difference range and less than the difference in the third difference range.

[0066] The first, second, and third difference intervals can be set adjacently and share the same interval dividing point.

[0067] Specifically, if the difference is within the first difference range, the current heat dissipation condition is determined to be a normal heat dissipation condition; if the difference is within the second difference range, the current heat dissipation condition is determined to be a condition with slight degradation of heat dissipation performance; and if the difference is within the third difference range, the current heat dissipation condition is determined to be a condition with severe degradation of heat dissipation performance.

[0068] The heat dissipation conditions in this embodiment include three conditions: normal heat dissipation, slightly degraded heat dissipation performance, and severely degraded heat dissipation performance. The difference range is divided into three corresponding difference ranges, which can meet the heat dissipation adjustment of the compressor and ensure the normal operation of the compressor.

[0069] To improve the control precision of the controller, in other embodiments, the above-mentioned operating conditions and difference ranges can be further divided, and the control principle is similar to that of the above embodiments.

[0070] Step S32: Control the compressor to work using the control strategy corresponding to the current heat dissipation conditions.

[0071] The controller has multiple pre-stored heat dissipation conditions, multiple control strategies for the compressor, and the mapping relationship between the two. Based on this mapping relationship, the controller obtains the control strategy corresponding to the current heat dissipation condition and controls the compressor to work, which can improve the real-time performance of compressor control.

[0072] Optionally, step S32 can be implemented in this embodiment by the following method, specifically:

[0073] In response to the current heat dissipation condition being normal, the compressor is controlled to continue operating at the current speed; in response to the current heat dissipation condition being slightly degraded, the compressor is controlled to reduce its speed by a first magnitude to the first speed; in response to the current heat dissipation condition being severely degraded, the compressor is controlled to reduce its speed and periodically execute the following sub-steps within a first duration.

[0074] 1) Control the compressor to run at the second speed for the second duration;

[0075] 2) Control the compressor to stop working for the third time.

[0076] Among them, the first duration is greater than or equal to the sum of the second duration and the third duration, and the second magnitude of the second speed reduction is greater than the first magnitude.

[0077] When the condensing and heat dissipation performance is normal, i.e., under normal heat dissipation conditions, the controller controls the compressor to maintain its current speed, without adjusting the compressor speed. When the condensing and heat dissipation performance is slightly degraded, i.e., under conditions of slightly degraded heat dissipation, the controller controls the compressor to reduce its speed, specifically controlling the compressor to reduce its speed by a second magnitude larger than the first magnitude, to operate at a second speed. Furthermore, the controller controls the compressor to operate intermittently, i.e., operating at the second speed for a second duration, pausing for a third duration, and then resuming operation at the second speed, repeating this cycle for the first duration.

[0078] In this embodiment, when the condensing heat dissipation performance is slightly reduced, the compressor is controlled to run at a smaller initial deceleration value. This not only reduces the compressor's operating speed to decrease its heat dissipation and thus its temperature, but also maintains its cooling capacity. The only difference is that the compressor's single-run duration is extended. Therefore, this control strategy allows the compressor to run continuously and smoothly, and its surface temperature will not remain high. This maintains the cooling capacity without affecting user use, and also improves the problem of excessive compressor temperature causing safety accidents.

[0079] In this embodiment, when the condenser's heat dissipation performance is severely degraded, the compressor is controlled to operate at a significantly reduced second amplitude and intermittently. Because when the condenser's heat dissipation performance is severely degraded, even if the compressor runs at low speed for a period of time, it will still reach a certain high temperature. Controlling the compressor to operate at a significantly reduced second amplitude and intermittently not only significantly reduces the compressor temperature, thus mitigating safety issues caused by compressor overheating, but also maintains a certain cooling capacity. Specifically, when the condenser's heat dissipation performance is severely degraded, the heat dissipation is insufficient to maintain the refrigerator's normal operation. If the compressor continues to run according to its original rules, the compressor temperature will rise rapidly, leading to a safety accident. This application can detect the difference in the actual operating speed of the condenser fan in this situation and promptly reduce the compressor speed and operate it according to a certain on-off time to lower the compressor temperature. During this operation, the user can detect abnormal cooling and report the problem to after-sales service. The refrigerator operates safely and receives repairs, thus avoiding safety accidents and protecting consumer property.

[0080] Optionally, this embodiment can also be achieved through methods such as Figure 5 The method shown implements step S31, and the method in this embodiment includes steps S51 to S54.

[0081] Step S51: Determine the first difference interval, the second difference interval, and the third difference interval based on the ambient temperature.

[0082] The controller acquires the ambient temperature of the refrigerator and determines the first difference interval, the second difference interval, and the third difference interval based on the ambient temperature.

[0083] Optionally, in response to the ambient temperature being within a first temperature range, a first difference range, a second difference range, and a third difference range are determined based on a first interval division point and a second interval division point; in response to the ambient temperature being within a second temperature range, the first difference range, the second difference range, and the third difference range are determined based on a third interval division point and a fourth interval division point; in response to the ambient temperature being within a third temperature range, the first difference range, the second difference range, and the third difference range are determined based on a fifth interval division point and a sixth interval division point; wherein, the third interval division point is located between the first interval division point and the fifth interval division point, the second interval division point is less than or equal to the fourth interval division point, and the sixth interval division point is less than the fourth interval division point; the second temperature range is higher than the first temperature range and lower than the third temperature range.

[0084] The second temperature range being greater than the first temperature range and less than the third temperature range means that the second temperature range is located between the first temperature range and the third temperature range, and the temperature value in the second temperature range is greater than the temperature value in the first temperature range and less than the temperature value in the third temperature range.

[0085] The first, second, and third temperature ranges can be set adjacently and share the same interval dividing point.

[0086] The controller determines different interval division points based on the ambient temperature in different temperature ranges to divide the difference intervals into different combinations. This allows the division of the difference intervals to take the ambient temperature into account, thereby improving the accuracy of compressor control.

[0087] The controller can first store multiple different temperature ranges, and the first difference range, second difference range and third difference range corresponding to each temperature range, that is, step 51 is executed before step S11; or the controller can first store multiple different temperature ranges, and the interval division points of the difference range corresponding to each temperature range, and then obtain the first difference range, second difference range and third difference range in real time based on these interval division points.

[0088] Step S52: In response to the difference being within the first difference range, the current heat dissipation condition is determined to be a normal heat dissipation condition.

[0089] For detailed implementation methods, please refer to the above embodiments.

[0090] Step S53: In response to the difference being within the second difference range, the current heat dissipation condition is determined to be a condition with slight degradation in heat dissipation performance.

[0091] For detailed implementation methods, please refer to the above embodiments.

[0092] Step S54: In response to the difference being located in the third difference interval, the current heat dissipation condition is determined to be a condition of severe heat dissipation performance degradation; wherein, the second difference interval is greater than the first difference interval and less than the third difference interval.

[0093] For detailed implementation methods, please refer to the above embodiments.

[0094] Based on the above embodiments, this embodiment determines different interval division points based on ambient temperature to divide the difference intervals of different combinations, so that the division of the difference intervals takes ambient temperature as a parameter, which can improve the accuracy of compressor control.

[0095] In the embodiments of this application, the interval division points corresponding to two adjacent temperature intervals are at least different, and it is not limited to the above embodiments.

[0096] Optionally, in this embodiment, the first amplitude corresponding to the second temperature range is greater than the first amplitude corresponding to the first temperature range and less than the first amplitude corresponding to the third temperature range; the second amplitude corresponding to the second temperature range is greater than the second amplitude corresponding to the first temperature range and less than the second amplitude corresponding to the third temperature range; the second duration corresponding to the second temperature range is less than the second duration corresponding to the first temperature range and greater than the second duration corresponding to the third temperature range; and the third duration corresponding to the second temperature range is greater than the third duration corresponding to the first temperature range and less than the third duration corresponding to the third temperature range.

[0097] The compressor's speed reduction amplitude, i.e., the first amplitude and the second amplitude, and the intermittent operation duration, i.e., the second duration and the third duration, are related to the ambient temperature. Specifically, the higher the ambient temperature, the larger the first and second amplitudes, meaning the greater the compressor speed reduction; the higher the ambient temperature, the shorter the second duration and the longer the third duration, meaning the compressor's running time is shorter and the shutdown time is longer. This control strategy allows the compressor to maximize heat dissipation at high temperatures.

[0098] In one application scenario, the specific values ​​of the above amplitude and duration can be derived from the refrigerator system's first power-on operation under various ambient temperatures, after the refrigerator is powered off and the ambient temperature stabilizes, with the condenser fan not running (simulating poor heat dissipation), and the compressor surface temperature does not exceed the high temperature threshold, such as 120°C, throughout the entire process from startup to stable operation.

[0099] This application further proposes another embodiment of a refrigerator control method, such as... Figure 6 As shown, Figure 6 This is a flowchart illustrating another embodiment of the refrigerator control method of this application. The control method of this embodiment specifically includes the following steps:

[0100] Step S61: Obtain the ambient temperature.

[0101] The refrigerator also includes a temperature acquisition mechanism connected to the controller, which is used to acquire the ambient temperature of the refrigerator. The controller obtains the ambient temperature of the refrigerator from the temperature acquisition mechanism.

[0102] Step S62: In response to the ambient temperature being greater than or equal to the low temperature threshold, determine the current speed and target speed of the condenser fan.

[0103] For a detailed explanation of how to determine the current and target speeds of the condenser fan, please refer to the above embodiments.

[0104] Step S63: Calculate the difference between the current speed and the target speed.

[0105] For detailed implementation methods, please refer to the above embodiments.

[0106] Step S64: Control the compressor operation based on the difference.

[0107] For detailed implementation methods, please refer to the above embodiments.

[0108] The controller in this embodiment further judges the ambient temperature based on the above embodiment, and only controls the compressor to work based on the speed of the condenser fan when the ambient temperature is greater than or equal to the low temperature threshold. This is because at low temperatures, the condenser can dissipate heat through the ambient airflow and does not need to turn on the condenser fan. Therefore, this embodiment can save the controller's computational load.

[0109] For example, when the ambient temperature is less than 13°C, the environment provides sufficient natural condensation for the condenser, and the condenser fan does not need to be turned on. Therefore, there is no need to calculate the condenser fan speed or control the compressor based on that speed.

[0110] In one embodiment, the ambient temperature T (°C), the duration t (i.e., the fourth duration) of the condenser fan speed decay range, the difference in condenser fan speed ΔP (rpm), and the compressor control strategy can be as shown in Table 1.

[0111] Table 1

[0112]

[0113] Among them, control strategy 1 is: the compressor is controlled according to the normal program; control strategy 2 is: the compressor speed is reduced to the first speed by the first magnitude; control strategy 3 is: the compressor speed is reduced to the second speed by the second magnitude, and the compressor is controlled to run intermittently for the first time in a cycle of running for the second duration and stopping for the first duration.

[0114] Specifically, when the controller determines that the ambient temperature T is less than 13℃, there is no need to determine the speed deviation of the condenser fan; when the controller determines that the ambient temperature T is greater than or equal to 13℃, it first determines the temperature range in which the ambient temperature T is located and the difference between the current speed and the target speed of the condenser fan, i.e., the speed deviation, and then obtains the corresponding control strategy based on Table 1 above to control the compressor to work.

[0115] It should be noted that the control parameters of the same control strategy can be different in different temperature ranges; the control parameters of the same control strategy can also be different under different temperature differences ΔP.

[0116] In another embodiment, the second temperature range (20-43) can be further subdivided into a first sub-temperature range (20-34) and a second sub-temperature range (34-43), as shown in Table 2.

[0117] Table 2

[0118]

[0119]

[0120] It should be noted that the control parameters of the same control strategy can be different in different temperature ranges; the control parameters of the same control strategy can also be different under different temperature differences ΔP.

[0121] In another embodiment, the third difference interval (800-1200) can be further subdivided into a first sub-difference interval (800-1000) and a second sub-difference interval (1000-1200), as shown in Table 3.

[0122] Table 3

[0123]

[0124]

[0125] It is important to note that the control parameters for the same control strategy can differ across different temperature ranges; similarly, the control parameters for the same control strategy can also differ across different temperature differences ΔP. ​​For example, in control strategy 2 for temperature ranges (13-20°C), (20-34°C), (34-43°C), and (>43°C), the first amplitude increases sequentially, the second amplitude increases sequentially, the second duration decreases sequentially, and the third duration increases sequentially. Furthermore, within the same temperature range and under the same strategy, the larger the temperature difference ΔP, the larger the first amplitude, the larger the second amplitude, the shorter the second duration, and the longer the third duration.

[0126] In other embodiments, similar methods can be used to subdivide other temperature ranges or sub-temperature ranges, or to subdivide other difference ranges or sub-difference ranges.

[0127] In another embodiment, the refrigerator control method may further include: adjusting the current speed of the fan based on the difference to reduce the difference between the current speed and the target speed.

[0128] The controller adjusts the condenser fan speed in real time based on the difference between the current speed and the target speed. When the difference between the current speed and the target speed of the condenser fan is maintained within the above-mentioned difference range for a certain period of time, the controller implements different control strategies for the compressor.

[0129] Considering the speed reduction of the condenser fan, the above difference is an absolute value, or the difference between the target speed and the current speed.

[0130] This application further proposes a computer storage medium, such as Figure 7 As shown, Figure 7This is a schematic diagram of the structure of an embodiment of the computer storage medium of this application.

[0131] The computer storage medium 90 of this application embodiment stores program instructions 91, which are executed to implement the above-described refrigerator control method.

[0132] Specifically, program instructions 91 can form a program file and be stored in the aforementioned storage medium as a software product, so that an electronic device (which may be a personal computer, server, or network device, etc.) or processor can execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, or terminal devices such as computers, servers, mobile phones, and tablets.

[0133] In this embodiment, the computer storage medium 90 can be, but is not limited to, a USB flash drive, SD card, PD optical drive, portable hard drive, large-capacity floppy drive, flash memory, multimedia memory card, server, etc.

[0134] In one embodiment, a computer program product or computer program is provided, comprising computer instructions stored in a computer storage medium. A processor of an electronic device reads the computer instructions from the computer storage medium and executes the computer instructions, causing the electronic device to perform the steps described in the above method embodiments.

[0135] Furthermore, if the aforementioned functions are implemented as software functions and sold or used as independent products, they can be stored in a mobile terminal-readable storage medium. That is, this application also provides a storage device storing program data, which can be executed to implement the methods of the above embodiments. This storage device can be, for example, a USB flash drive, an optical disc, or a server. In other words, this application can be embodied in the form of a software product, which includes several instructions to cause a smart terminal to execute all or part of the steps of the methods described in the various embodiments.

[0136] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0137] The refrigerator control method provided in this application can calculate the difference between the current speed and the target speed of the condenser fan, i.e., the speed deviation of the condenser fan, and control the compressor operation based on this difference. Since the speed deviation of the condenser fan directly affects the heat dissipation effect of the refrigerator's condenser, and the quality of the condenser's heat dissipation directly affects the compressor temperature, this application controls the compressor operation based on the speed deviation of the condenser fan, allowing the compressor temperature to be appropriately adjusted. For example, when the speed deviation of the condenser fan is large, the heat dissipation effect is greatly weakened or even lost. If the compressor continues to operate according to its original rules, it will reach a high temperature state in a short time. If the user does not perceive the refrigerator malfunction in time, it could lead to floor deformation or even a fire in the refrigerator's compressor compartment due to high temperature. Using this application, in such cases, the actual operating speed difference of the condenser fan can be sensed to determine the cause. When the speed deviation of the condenser fan is large, the compressor speed can be reduced in time and operated according to a certain on-off time to lower the compressor temperature. During this operation, the user can detect abnormal cooling and report the problem to after-sales service, ensuring the refrigerator operates safely and receives repairs, thus preventing safety accidents and protecting consumer property. Therefore, this application can improve the problem of high compressor temperature caused by poor condenser heat dissipation in refrigerators, thereby reducing safety issues caused by high compressor temperature.

[0138] The condenser fan of this application is equipped with a speed feedback line. The controller monitors the difference between the actual speed and the target speed of the condenser fan through speed feedback and outputs voltage in real time to correct the speed. When the difference between the actual speed and the target speed of the condenser fan is maintained within a certain range for a certain period of time, the controller further distinguishes whether the speed decay belongs to the normal heat dissipation condition, the mild heat dissipation condition, or the severe heat dissipation condition. The controller controls the compressor to reduce the speed accordingly or operate intermittently to avoid safety problems such as discoloration, deformation, or even fire caused by the compressor running at a high speed continuously and the compressor surface temperature being too high. This can reduce property damage and safety accidents for users.

[0139] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for controlling a refrigerator, characterized in that, The refrigerator includes a condenser fan and a compressor, and the control method includes: Determine the current speed and target speed of the condenser fan; Calculate the difference between the current rotational speed and the target rotational speed; The compressor is controlled to operate based on the difference. The step of controlling the compressor operation based on the difference includes: The current heat dissipation condition is determined based on the difference. The compressor is controlled using a control strategy corresponding to the current heat dissipation condition. The step of determining the current heat dissipation condition based on the difference includes: If the difference is within the first difference range, then the current heat dissipation condition is determined to be a normal heat dissipation condition. If the difference is within the second difference range, then the current heat dissipation condition is determined to be a condition with slight degradation in heat dissipation performance. If the difference is within the third difference range, then the current heat dissipation condition is determined to be a condition with severely degraded heat dissipation performance. Wherein, the second difference interval is greater than the first difference interval and less than the third difference interval; The step of controlling the compressor operation using a control strategy corresponding to the current heat dissipation condition includes: In response to the condition that the current heat dissipation condition is the normal heat dissipation condition, the compressor is controlled to continue operating at the current speed; In response to the current heat dissipation condition being a condition of slight degradation in heat dissipation performance, the compressor is controlled to reduce its speed by a first amount to a first speed. In response to the current heat dissipation condition being a condition of severe heat dissipation performance degradation, the compressor is controlled to operate at a reduced speed, and the following sub-steps are periodically executed within a first duration: The compressor is controlled to run at a second speed for a second duration; The compressor is controlled to stop working for a third duration; Wherein, the first duration is greater than or equal to the sum of the second duration and the third duration, and the second magnitude of the second speed reduction is greater than the first magnitude.

2. The control method according to claim 1, characterized in that, The step of determining the current heat dissipation condition based on the difference also includes: The first difference interval, the second difference interval, and the third difference interval are determined based on the ambient temperature.

3. The control method according to claim 2, characterized in that, Determining the first difference interval, the second difference interval, and the third difference interval based on the ambient temperature includes: In response to the ambient temperature being within a first temperature range, the first difference range, the second difference range, and the third difference range are determined based on the first interval division point and the second interval division point; In response to the ambient temperature being within the second temperature range, the first difference range, the second difference range, and the third difference range are determined based on the third and fourth interval division points; In response to the ambient temperature being in the third temperature range, the first difference range, the second difference range, and the third difference range are determined based on the fifth and sixth interval division points; Wherein, the third interval division point is located between the first interval division point and the fifth interval division point, the second interval division point is less than or equal to the fourth interval division point, and the sixth interval division point is less than the fourth interval division point; the second temperature interval is higher than the first temperature interval and lower than the third temperature interval.

4. The control method according to claim 3, characterized in that, The first amplitude corresponding to the second temperature range is greater than the first amplitude corresponding to the first temperature range, and less than the first amplitude corresponding to the third temperature range; and / or The second amplitude corresponding to the second temperature range is greater than the second amplitude corresponding to the first temperature range and less than the second amplitude corresponding to the third temperature range; the second duration corresponding to the second temperature range is less than the second duration corresponding to the first temperature range and greater than the second duration corresponding to the third temperature range; the third duration corresponding to the second temperature range is greater than the third duration corresponding to the first temperature range and less than the third duration corresponding to the third temperature range.

5. The control method according to claim 1, characterized in that, The calculation of the difference between the current rotational speed and the target rotational speed includes: Calculate the difference between the current rotational speed and the target rotational speed obtained multiple times within the fourth time period; Obtain the difference that represents the highest percentage.

6. The control method according to claim 5, characterized in that, The fourth duration is inversely correlated with ambient temperature.

7. The control method according to any one of claims 1 to 6, characterized in that, Before determining the current speed and target speed of the condenser fan, the method further includes: Obtain the ambient temperature; In response to the ambient temperature being greater than or equal to a low temperature threshold, the step of determining the current speed and target speed of the condenser fan is performed.

8. The control method according to any one of claims 1 to 6, characterized in that, Also includes: The current speed of the fan is adjusted based on the difference to reduce the difference.

9. A refrigerator, characterized in that, include: compressor; The condenser is connected to the compressor via pipes; A condenser fan is configured to dissipate heat from the condenser. A controller, connected to the compressor and the condenser fan, is used to control the operation of the compressor and the condenser fan using the control method according to any one of claims 1 to 8.

10. A computer storage medium, characterized in that, It stores program instructions that are executed by a processor to implement the control method according to any one of claims 1 to 8.

Images