Refrigerator, control method thereof, vehicle, storage medium, and computer program product
By adjusting the compressor speed by measuring the temperature difference between the refrigerator's supply and return air, the problem of uneven internal temperature was solved, thus improving the cooling effect and energy efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEFEI MIDEA REFRIGERATOR CO LTD
- Filing Date
- 2024-12-30
- Publication Date
- 2026-06-30
Smart Images
Figure CN122305748A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of refrigerator control technology, and more particularly to a refrigerator and its control method, a vehicle, a storage medium, and a computer program product. Background Technology
[0002] Normally, a refrigerator controls the compressor speed by adjusting the internal ambient temperature to achieve cooling. However, the internal temperature of a refrigerator can be uneven. The temperature detected by the temperature sensor is affected by the sensor's location. For example, if the temperature sensor is blocked by food, it can cause temperature inaccuracies, ultimately leading to lower precision in compressor speed control and poor cooling performance. Summary of the Invention
[0003] The main objective of this application is to provide a refrigerator and its control method, vehicle, storage medium and computer program product, which aims to solve the technical problems of low compressor speed control accuracy and poor refrigerator cooling effect.
[0004] To achieve the above objectives, this application proposes a refrigerator control method, the method comprising:
[0005] Determine the temperature difference between the supply air temperature and the return air temperature in the refrigeration compartment of the refrigerator, wherein the supply air temperature is the temperature at the air outlet in the refrigeration compartment, and the return air temperature is the temperature at the air inlet in the refrigeration compartment.
[0006] The target speed of the compressor is determined based on the initial speed of the compressor and the temperature difference value.
[0007] The compressor is controlled to operate according to the target rotational speed.
[0008] In one embodiment, the step of determining the target speed of the compressor based on the initial speed of the compressor and the temperature difference includes:
[0009] Determine the temperature ratio of the temperature difference to the return air temperature;
[0010] The speed adjustment value is determined based on the ratio of the initial speed to the temperature.
[0011] When the temperature difference is greater than a preset difference threshold, the target rotational speed is determined based on the sum of the initial rotational speed and the rotational speed adjustment value; and / or,
[0012] When the temperature difference is less than or equal to a preset difference threshold, the target rotational speed is determined based on the difference between the initial rotational speed and the rotational speed adjustment value.
[0013] In one embodiment, after the step of controlling the compressor operation according to the target speed, the method further includes:
[0014] The rate of change of air supply temperature is determined based on the temperature change value of the air supply temperature within a preset first time interval.
[0015] The rate of change of return air temperature is determined based on the temperature change value of the return air temperature within a preset second time interval;
[0016] The refrigerator is controlled to start defrosting based on the rate of change of the supply air temperature and the rate of change of the return air temperature.
[0017] In one embodiment, the step of controlling the refrigerator to start defrosting based on the supply air temperature change rate and the return air temperature change rate includes:
[0018] When the rate of change of the supply air temperature is greater than the supply air rate threshold, and / or the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator is controlled to start defrosting.
[0019] In one embodiment, after the step of controlling the refrigerator to start defrosting, the method further includes:
[0020] Determine the first temperature difference between the supply air temperature and the reference supply air temperature during normal refrigerator operation;
[0021] Determine a second temperature difference between the return air temperature and the reference return air temperature during normal refrigerator operation;
[0022] When the first temperature difference is less than a preset first temperature difference threshold and the second temperature difference is less than a preset second temperature difference threshold, the refrigerator is controlled to end defrosting.
[0023] In one embodiment, the step of controlling the refrigerator to start defrosting when the rate of change of the supply air temperature is greater than the supply air rate threshold, and / or the rate of change of the return air temperature is greater than the return air rate threshold includes:
[0024] When the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator defrosts based on a preset first defrosting time.
[0025] When the rate of change of the supply air temperature is greater than the supply air rate threshold, or the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator defrosts based on a preset second defrost duration; wherein, the first defrost duration is greater than the second defrost duration.
[0026] In one embodiment, a heating component is provided on the evaporator side of the refrigerator. The step of controlling the refrigerator to start defrosting when the rate of change of the supply air temperature is greater than the supply air rate threshold and / or the rate of change of the return air temperature is greater than the return air rate threshold includes:
[0027] When the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the heating component is controlled according to the first heating temperature to control the defrosting of the refrigerator.
[0028] When the rate of change of the supply air temperature is greater than the supply air rate threshold, or the rate of change of the return air temperature is greater than the return air rate threshold, the heating component is controlled according to the second heating temperature to control the defrosting of the refrigerator; wherein, the first heating temperature is greater than the second heating temperature.
[0029] In one embodiment, the air supply rate threshold is obtained through the following steps:
[0030] Determine the first running time between the refrigerator's normal operation and the frosting condition, whether the refrigerator is running unloaded or fully loaded.
[0031] Obtain the reference air supply temperature when the refrigerator is operating normally, and determine the air supply temperature difference between the air supply temperature under the frosting condition and the reference air supply temperature.
[0032] The air supply rate threshold is determined based on the air supply temperature difference and the first operating time.
[0033] In one embodiment, the return air rate threshold is obtained through the following steps:
[0034] Determine the second running time between the refrigerator's normal operation and the frosting condition, whether the refrigerator is running unloaded or fully loaded.
[0035] Obtain the reference return air temperature during normal refrigerator operation, and determine the return air temperature difference between the return air temperature under frosting conditions and the reference return air temperature.
[0036] The return air rate threshold is determined based on the return air temperature difference and the second operating time.
[0037] In addition, to achieve the above objectives, this application also proposes a refrigerator, the refrigerator comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the refrigerator control method as described above.
[0038] In addition, to achieve the above objectives, this application also proposes a vehicle comprising:
[0039] Vehicle body;
[0040] The refrigerator described above is located on the vehicle body.
[0041] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the refrigerator control method described above.
[0042] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the refrigerator control method described above.
[0043] One or more technical solutions proposed in this application have at least the following technical effects:
[0044] By precisely adjusting the compressor speed based on the difference between the supply air temperature and the return air temperature, the temperature control accuracy inside the refrigerator is improved, resulting in a more uniform temperature and enhanced cooling performance. This improves user comfort and food preservation quality, while also preventing the compressor from running at high speeds, reducing energy waste and achieving energy savings. Attached Figure Description
[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0047] Figure 1 This is a flowchart illustrating an embodiment of the refrigerator control method of this application.
[0048] Figure 2 This is a schematic diagram of the refrigerator structure in the refrigerator control method of this application;
[0049] Figure 3 This is a flowchart illustrating Embodiment 2 of the refrigerator control method of this application;
[0050] Figure 4 This is a flowchart illustrating Embodiment 3 of the refrigerator control method of this application;
[0051] Figure 5This is a schematic diagram of the hardware operating environment involved in the refrigerator control method in this application embodiment.
[0052] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0053] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.
[0054] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0055] The main solution of this application embodiment is: determining the temperature difference between the supply air temperature and the return air temperature in the refrigeration space of the refrigerator; determining the target speed of the compressor based on the initial speed of the compressor and the temperature difference; and controlling the operation of the compressor based on the target speed.
[0056] In this embodiment, for ease of description, a refrigerator will be used as the subject of the explanation.
[0057] Normally, a refrigerator controls the compressor speed by adjusting the internal ambient temperature to achieve cooling. However, the internal temperature of a refrigerator can be uneven. The temperature detected by the temperature sensor is affected by the sensor's location. For example, if the temperature sensor is blocked by food, it can cause temperature inaccuracies, ultimately leading to lower precision in compressor speed control and reduced cooling efficiency.
[0058] This application provides a solution that precisely adjusts the compressor speed by measuring the difference between the supply air temperature and the return air temperature. This adjusts the temperature difference between the supply air temperature and the return air temperature in the refrigerated space, improving the accuracy of temperature control inside the refrigerator. This results in a more uniform temperature inside the refrigerator, enhancing the refrigeration effect and improving user comfort and food preservation quality. At the same time, it avoids the compressor running at high speeds, reducing energy waste and achieving energy-saving effects.
[0059] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a refrigerator. The following description uses a refrigerator as an example to illustrate this embodiment and the subsequent embodiments.
[0060] Based on this, embodiments of this application provide a refrigerator control method, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the refrigerator control method of this application.
[0061] In this embodiment, the refrigerator control method includes steps S10 to S30:
[0062] Step S10: Determine the temperature difference between the supply air temperature and the return air temperature in the refrigerator's cooling space. The supply air temperature is the temperature at the air outlet in the cooling space, and the return air temperature is the temperature at the air inlet in the cooling space.
[0063] In this application, reference is made to Figure 2 The refrigerator of this application includes a compressor 100, a condenser 200, a throttling device 400, and an evaporator 500 connected in sequence. Optionally, the evaporator 500 is a finned evaporator, etc. A fan 201 is provided on the condenser side, and a fan 501 is provided on the evaporator side. Optionally, a dryer filter 300 is provided between the condenser 200 and the evaporator 500, and a return gas pipe component 600 is provided between the evaporator 500 and the compressor 100. Optionally, the throttling device 400 is a capillary tube, etc.
[0064] When the refrigerator starts cooling, the compressor 100 supplies high-temperature, high-pressure gaseous refrigerant to the condenser 200. The high-temperature, high-pressure gaseous refrigerant liquefies and dissipates heat in the condenser 200, and the refrigerant flowing out of the condenser 200 is a room-temperature, high-pressure liquid refrigerant. This room-temperature, high-pressure liquid refrigerant passes through the dryer filter 300 and the throttling device 400 before entering the evaporator 500. In the evaporator 500, the room-temperature, high-pressure liquid refrigerant vaporizes and absorbs heat, and the refrigerant flowing out of the evaporator 500 is a room-temperature, low-pressure gaseous refrigerant. Finally, the room-temperature, low-pressure gaseous refrigerant flows back to the compressor 100, achieving cooling within the refrigerator's cooling compartment.
[0065] It should be noted that this is a frost-free refrigerator. The refrigerator's cooling compartment has an air outlet and an air inlet; for example, the air outlet is located at the top of the refrigerator, and the air inlet is located at the bottom. Cold air blows from the top to the bottom of the refrigerator to cool food and other items in the cooling compartment. Optionally, the refrigerator can be a vehicle refrigerator, a household refrigerator, an outdoor refrigerator, etc.
[0066] Temperature sensors are installed at both the air outlet and the air return vent in the refrigerator's cooling compartment. The temperature sensor at the air outlet is used to detect the supply air temperature t1, and the temperature sensor at the air return vent is used to detect the return air temperature t2.
[0067] Typically, temperature sensors at the air outlet are more sensitive, while those at the return air vent are less sensitive. To better capture the actual internal temperature under real-world user conditions, a return air temperature (t2) of +1 degree Celsius is used as the start-up point, and an air outlet temperature (t1) of -1 degree Celsius is used as the shutdown point. At this point, the temperature difference inside the refrigerator is 2 degrees Celsius. To further reduce the temperature difference inside the refrigerator, the temperature difference between the air outlet and return air vent can be reduced to control the overall temperature difference.
[0068] Optionally, the temperature difference Δt is determined based on the difference between the return air temperature t2 and the supply air temperature t1. For example, as shown in the formula: Δt = t2 - t1.
[0069] Optionally, the temperature difference Δt is determined based on the difference between the supply air temperature t1 and the return air temperature t2. For example, as shown in the formula: Δt = t1 - t2.
[0070] Step S20: Determine the target speed of the compressor based on the initial speed of the compressor and the temperature difference.
[0071] It should be noted that the target speed refers to the compressor speed, which is used to adjust the temperature difference between the supply air temperature and the return air temperature in the refrigerated space. With other factors affecting cooling performance remaining constant, a lower target speed results in poorer cooling performance and a larger temperature difference between the supply and return air temperatures; conversely, a higher target speed results in better cooling performance and a smaller temperature difference. By controlling the compressor speed, the temperature difference between the supply and return air temperatures can be made less than or equal to a preset threshold value.
[0072] Optionally, the initial speed of the compressor is determined by the cooling temperature or cooling mode set by the user.
[0073] Optionally, the initial compressor speed is determined by a temperature difference threshold between the supply air temperature and the return air temperature. This temperature difference threshold can be set by the user or determined by the cooling mode. The correspondence between the temperature difference threshold and the initial speed can be obtained from historical data or experimental data. For example, a temperature difference threshold Δt is set. 阈 The initial speed of the compressor is Z0.
[0074] Optionally, the speed adjustment value is determined based on the temperature difference between the supply air temperature and the return air temperature, so that the temperature difference is less than or equal to a preset difference threshold; wherein, the larger the temperature difference, the larger the speed adjustment value, and the smaller the temperature difference, the smaller the speed adjustment value.
[0075] Optionally, the rotation speed adjustment value is determined based on the difference between the temperature difference and the temperature difference threshold, so that the temperature difference inside the refrigerator is less than or equal to the preset difference threshold.
[0076] Optionally, the target speed of the compressor is determined based on the sum of the initial speed and the speed adjustment value. For example, as shown in the formula: Z = Z0 + ΔZ, where Z represents the target speed, Z0 represents the initial speed, and ΔZ represents the speed adjustment value.
[0077] Step S30: Control the compressor to operate according to the target speed.
[0078] It should be noted that the compressor is controlled to operate according to the target speed so that the temperature difference between the supply air temperature and the return air temperature is less than or equal to the preset difference threshold.
[0079] Optionally, when the temperature difference exceeds a preset difference threshold, the initial rotation speed is increased to obtain the target rotation speed. The compressor is then controlled to operate according to the target rotation speed to reduce the temperature difference inside the refrigerator, making the temperature inside the refrigerator more uniform.
[0080] Optionally, when the temperature difference is less than the preset difference threshold, the initial speed is reduced to obtain the target speed. The compressor is then controlled to operate according to the target speed, which reduces the air supply temperature and thus appropriately increases the temperature difference inside the refrigerator, making the temperature inside the refrigerator equal to the preset difference threshold, thereby ensuring the refrigerator's energy-saving effect.
[0081] In this embodiment, the temperature difference between the supply air temperature and the return air temperature in the refrigerator's cooling space is determined. Based on the compressor's initial speed and the temperature difference, the target speed of the compressor is determined. The compressor's operation is then controlled according to the target speed. By precisely adjusting the compressor speed based on the temperature difference between the supply and return air temperatures, the difference between the supply and return air temperatures in the cooling space is adjusted, improving the accuracy of temperature control inside the refrigerator. This results in a more uniform temperature inside the refrigerator, enhancing the cooling effect and improving user comfort and food preservation quality. Simultaneously, it avoids the compressor operating at high speeds, reducing energy waste and achieving energy savings.
[0082] Based on the first embodiment of this application, in the second embodiment of this application, the same or similar content as the above embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 Step S20 includes:
[0083] Step S21: Determine the temperature ratio between the temperature difference and the return air temperature;
[0084] Step S22: Determine the speed adjustment value based on the ratio of the initial speed to the temperature;
[0085] Step S23: When the temperature difference is greater than a preset difference threshold, the target rotational speed is determined based on the sum of the initial rotational speed and the rotational speed adjustment value; and / or,
[0086] Step S24: When the temperature difference is less than or equal to a preset difference threshold, the target rotational speed is determined based on the difference between the initial rotational speed and the rotational speed adjustment value.
[0087] It should be noted that the temperature ratio of the temperature difference to the return air temperature is determined, where the temperature ratio is an absolute value, as shown in the following formula:
[0088]
[0089] Where t1 represents the supply air temperature and t2 represents the return air temperature.
[0090] The speed adjustment value is determined based on the ratio of the initial speed to the temperature, as shown in the following formula:
[0091]
[0092] Where Z0 represents the initial rotational speed, t1 represents the supply air temperature, t2 represents the return air temperature, and Δt represents the temperature difference.
[0093] When the temperature difference Δt > Δt 阈 At that time, the target speed of the compressor is as follows:
[0094]
[0095] Where Z represents the target speed, Z0 represents the initial speed, t1 represents the supply air temperature, t2 represents the return air temperature, and Δt represents the temperature difference. Optionally, considering the impact of noise, the target speed is less than or equal to the preset maximum speed, for example, the maximum speed is 3800 rpm.
[0096] When the temperature difference Δt ≤ Δt 阈 At that time, the target speed of the compressor is shown in the following formula:
[0097]
[0098] Where Z represents the target speed, Z0 represents the initial speed, t1 represents the supply air temperature, t2 represents the return air temperature, and Δt represents the temperature difference.
[0099] In this embodiment, by determining the ratio of the temperature difference to the return air temperature and adjusting the compressor speed accordingly, the internal temperature of the refrigerator can be controlled more precisely, improving temperature control accuracy and enhancing user comfort. By intelligently controlling the compressor speed based on the ratio of the temperature difference to the return air temperature, cooling demands can be matched more accurately, thereby improving energy efficiency and reducing energy waste.
[0100] Based on the first or second embodiment of this application, in the third embodiment of this application, the content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 After step S30, the following steps are also included:
[0101] Step S40: Determine the rate of change of the supply air temperature based on the temperature change value of the supply air temperature within a preset first time interval;
[0102] Step S50: Determine the rate of change of return air temperature based on the temperature change value of return air temperature within a preset second time interval;
[0103] Step S60: Based on the rate of change of the supply air temperature and the rate of change of the return air temperature, control the refrigerator to start defrosting.
[0104] It should be noted that the frosting condition of a refrigerator refers to the situation in the refrigeration system, especially in air-cooled evaporators, where the surface temperature of the evaporator fins drops sufficiently to cause water vapor in the air to condense into frost when the ambient temperature is low. This typically occurs when the evaporator surface temperature is lower than the dew point temperature of the surrounding air, causing water vapor in the air to condense on the fin surface. If the fin temperature is below 0°C, frost will appear on its surface. Normal refrigerator operation refers to the refrigerator being in non-frost mode, during which it is in cooling mode.
[0105] As an optional embodiment, the refrigerator is controlled to start defrosting when the rate of change of the supply air temperature is greater than the supply air rate threshold and / or the rate of change of the return air temperature is greater than the return air rate threshold.
[0106] Optionally, when the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator is controlled to start defrosting.
[0107] Optionally, when the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is less than or equal to the return air rate threshold, the refrigerator is controlled to start defrosting.
[0108] Optionally, when the rate of change of the supply air temperature is less than or equal to the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator is controlled to start defrosting.
[0109] Optionally, when the rate of change of the supply air temperature exceeds a supply air rate threshold, and / or the rate of change of the return air temperature exceeds a return air rate threshold, defrosting is determined to be required. After a preset number of consecutive cycles that indicate defrosting is necessary, the refrigerator is controlled to begin defrosting; for example, the preset number of cycles is 5.
[0110] As an optional embodiment, under the frost condition of the refrigerator, a first temperature difference between the supply air temperature and the reference supply air temperature during normal refrigerator operation is determined; a second temperature difference between the return air temperature and the reference return air temperature during normal refrigerator operation is determined; when the first temperature difference is less than a preset first temperature difference threshold and the second temperature difference is less than a preset second temperature difference threshold, the refrigerator is controlled to end defrosting.
[0111] It should be noted that the preset first temperature difference threshold and the preset second temperature difference threshold are set by the user or measured based on historical or experimental data. When the first temperature difference is greater than or equal to the preset first temperature difference threshold, the refrigerator is in a frosting state. When the second temperature difference is greater than or equal to the preset second temperature difference threshold, the refrigerator is in a frosting state. When the first temperature difference is less than the preset first temperature difference threshold and the second temperature difference is less than the preset second temperature difference threshold, the refrigerator is in normal cooling mode and does not require defrosting.
[0112] Optionally, when V1≥V 1霜阈 V2≥V 2霜阈 If the results are the same after a preset number of consecutive tests, the refrigerator will begin defrosting until Δt1 < Δt. 1霜阈 And Δt2 < Δt 2霜阈 The time ends. Where V1 represents the rate of change of supply air temperature, V2 represents the rate of change of return air temperature, and V... 1霜阈 V represents the air supply rate threshold. 2霜阈 This represents the return air rate threshold. Δt1 represents the first temperature difference, Δt 1霜阈 Δt represents the first temperature difference threshold, Δt2 represents the second temperature difference, and Δt 2霜阈 This indicates the second temperature difference threshold.
[0113] Because the temperature sensor at the air inlet of the refrigerator is located inside the refrigerator's cooling compartment, when frost occurs at the air inlet, the temperature sensor detects an increase in the supply air temperature. The temperature sensor at the air outlet is generally located in the duct outside the refrigerator's cooling compartment, and when frost occurs at the air outlet, the temperature sensor detects an increase in the return air temperature.
[0114] Optionally, when V1≥V 1霜阈 V2 < V 2霜阈 When the refrigerator is in a defrost state, it indicates that the air vents are clogged with frost and defrosting is required. Control the refrigerator to start the defrost function.
[0115] Optionally, when V1 < V 1霜阈 V2≥V 2霜阈 When the refrigerator is blocked, it indicates that there is frost buildup in the return air vent and defrosting is required. Control the refrigerator to start the defrosting process.
[0116] Optionally, when the rate of change of the supply air temperature is less than or equal to the supply air rate threshold, and the rate of change of the return air temperature is less than or equal to the return air rate threshold, the refrigerator continues to operate without defrosting. For example, when V1 < V... 1霜阈 V2 < V 2霜阈 At that time, the frost did not melt.
[0117] As an optional embodiment, when the rate of change of the supply air temperature exceeds the supply air rate threshold and the rate of change of the return air temperature exceeds the return air rate threshold, the refrigerator experiences severe frost buildup. Defrosting is then controlled based on a preset first defrosting time to improve defrosting efficiency. Conversely, when the rate of change of the supply air temperature exceeds the supply air rate threshold or the rate of change of the return air temperature exceeds the return air rate threshold, frost buildup is not severe. Defrosting is then controlled based on a preset second defrosting time to save defrosting energy. The first defrosting time is longer than the second defrosting time. By controlling the refrigerator to perform defrosting for different durations based on the defrosting conditions, both the defrosting effect and energy consumption are improved.
[0118] In one optional embodiment, a heating element is provided on the evaporator side of the refrigerator. When the rate of change of the supply air temperature exceeds a supply air rate threshold, and the rate of change of the return air temperature exceeds a return air rate threshold, the refrigerator experiences severe frost buildup. The heating element is controlled based on a first heating temperature to control defrosting. When the rate of change of the supply air temperature exceeds a supply air rate threshold, or the rate of change of the return air temperature exceeds a return air rate threshold, the heating element is controlled based on a second heating temperature to control defrosting. The first heating temperature is higher than the second heating temperature. By controlling the defrosting process, the refrigerator can be defrosted at different temperatures, improving defrosting efficiency while also saving energy.
[0119] Optionally, when the rate of change of the supply air temperature exceeds a supply air rate threshold, and the rate of change of the return air temperature exceeds a return air rate threshold, the heating element is controlled according to a preset first defrosting time and a first heating temperature to control the refrigerator's defrosting process. When the rate of change of the supply air temperature exceeds a supply air rate threshold, or the rate of change of the return air temperature exceeds a return air rate threshold, the heating element is controlled according to a preset second defrosting time and a second heating temperature to control the refrigerator's defrosting process. The first defrosting time is longer than the second defrosting time, and the first heating temperature is longer than the second heating temperature. By controlling the refrigerator to perform defrosting at different times and temperatures based on the defrosting conditions, the defrosting effect is improved while also saving refrigerator energy.
[0120] As an optional embodiment, the air supply rate threshold is obtained through the following steps: when the refrigerator is running unloaded or fully loaded, determine the first running time between the refrigerator's normal operation and the frosting condition; obtain the reference air supply temperature when the refrigerator is running normally, and determine the air supply temperature difference between the air supply temperature in the frosting condition and the reference air supply temperature; determine the air supply rate threshold based on the air supply temperature difference and the first running time.
[0121] It should be noted that when the refrigerator door is closed, the reference air supply temperature during normal empty or full-load operation is t1. After the first running time T1, the refrigerator frosts and the current air supply temperature is t11. The air supply rate threshold V... 1霜阈=Δt1 / T1=(t11-t1) / T1.
[0122] As an optional embodiment, the return air rate threshold is obtained through the following steps: when the refrigerator is running empty or fully loaded, determine the second running time between the refrigerator's normal operation and the frosting condition; obtain the reference return air temperature when the refrigerator is running normally, and determine the return air temperature difference between the return air temperature in the frosting condition and the reference return air temperature; determine the return air rate threshold based on the return air temperature difference and the second running time.
[0123] It should be noted that when the refrigerator door is closed, the return air temperature during normal empty or full-load operation is t2. After the second running time T2, the refrigerator frosts and the current return air temperature is t22. The return air rate threshold V... 2霜阈 =Δt2 / T2=(t22-t2) / T2.
[0124] In this embodiment, by monitoring the rate of change of the supply air temperature and return air temperature, and controlling the defrosting process of the refrigerator accordingly, the temperature can be adjusted more precisely, avoiding over-defrosting and under-defrosting, improving energy efficiency, and reducing energy consumption. On-demand defrosting effectively reduces unnecessary defrosting cycles, reduces defrosting power, and reduces compressor operating time, thus achieving energy saving and consumption reduction.
[0125] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the refrigerator in this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0126] This application provides a refrigerator, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the refrigerator control method of the above embodiment 1.
[0127] The following is for reference. Figure 5 It shows a structural schematic diagram of a refrigerator suitable for implementing the embodiments of this application. Figure 5 The refrigerator shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.
[0128] like Figure 5As shown, the refrigerator may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for refrigerator operation. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touchscreen, a touchpad, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, etc.; a storage device 1003; and a communication device 1009. The communication device 1009 allows the refrigerator to communicate wirelessly or wiredly with other devices to exchange data. Although the diagram shows refrigerators with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.
[0129] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0130] The refrigerator provided in this application, employing the refrigerator control method described in the above embodiments, can solve the technical problems of low compressor speed control accuracy and poor refrigerator cooling effect. Compared with the prior art, the beneficial effects of the refrigerator provided in this application are the same as those of the refrigerator control method provided in the above embodiments, and other technical features of this refrigerator are the same as those disclosed in the previous embodiment method, and will not be repeated here.
[0131] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0132] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0133] This application provides a vehicle, including: a vehicle body; and a refrigerator as described in the above embodiment, wherein the refrigerator is disposed on the vehicle body.
[0134] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the refrigerator control method of the above embodiments.
[0135] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.
[0136] The aforementioned computer-readable storage medium may be included in the refrigerator or may exist independently without being assembled into the refrigerator.
[0137] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the refrigerator, cause the refrigerator to: precisely adjust the compressor speed by the difference between the supply air temperature and the return air temperature, thereby adjusting the difference between the supply air temperature and the return air temperature in the refrigeration space, improving the accuracy of temperature control inside the refrigerator, making the temperature inside the refrigerator more uniform, improving the refrigeration effect of the refrigerator, thereby improving the user's comfort and the preservation quality of food, while avoiding the compressor from running at a high speed, reducing energy waste, and achieving energy-saving effects.
[0138] Computer program code for performing the operations of this application can be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, and C++, and conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed 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 cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0139] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0140] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.
[0141] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described refrigerator control method. This solves the technical problems of low compressor speed control accuracy and poor refrigerator cooling effect. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the refrigerator control method provided in the above embodiments, and will not be repeated here.
[0142] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the refrigerator control method described above.
[0143] The computer program product provided in this application can solve the technical problems of low compressor speed control accuracy and poor refrigerator cooling effect. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the refrigerator control method provided in the above embodiments, and will not be repeated here.
[0144] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.
Claims
1. A control method of a refrigerator, characterized by, The method includes: Determine the temperature difference between the supply air temperature and the return air temperature in the refrigeration compartment of the refrigerator, wherein the supply air temperature is the temperature at the air outlet in the refrigeration compartment, and the return air temperature is the temperature at the air inlet in the refrigeration compartment. The target speed of the compressor is determined based on the initial speed of the compressor and the temperature difference value. The compressor is controlled to operate according to the target rotational speed.
2. The method of claim 1, wherein, The step of determining the target speed of the compressor based on the initial speed of the compressor and the temperature difference includes: Determine the temperature ratio of the temperature difference to the return air temperature; The speed adjustment value is determined based on the ratio of the initial speed to the temperature. When the temperature difference is greater than a preset difference threshold, the target rotational speed is determined based on the sum of the initial rotational speed and the rotational speed adjustment value; and / or, When the temperature difference is less than or equal to a preset difference threshold, the target rotational speed is determined based on the difference between the initial rotational speed and the rotational speed adjustment value.
3. The method of claim 1, wherein, After the step of controlling the compressor operation according to the target speed, the method further includes: The rate of change of air supply temperature is determined based on the temperature change value of the air supply temperature within a preset first time interval. The rate of change of return air temperature is determined based on the temperature change value of the return air temperature within a preset second time interval; The refrigerator is controlled to start defrosting based on the rate of change of the supply air temperature and the rate of change of the return air temperature.
4. The method of claim 3, wherein, The step of controlling the refrigerator to start defrosting based on the supply air temperature change rate and the return air temperature change rate includes: When the rate of change of the supply air temperature is greater than the supply air rate threshold, and / or the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator is controlled to start defrosting.
5. The method of claim 4, wherein, After the step of controlling the refrigerator to start defrosting, the method further includes: Determine the first temperature difference between the supply air temperature and the reference supply air temperature during normal refrigerator operation; Determine a second temperature difference between the return air temperature and the reference return air temperature during normal refrigerator operation; When the first temperature difference is less than a preset first temperature difference threshold and the second temperature difference is less than a preset second temperature difference threshold, the refrigerator is controlled to end defrosting.
6. The method as described in claim 4, characterized in that, The step of controlling the refrigerator to start defrosting when the rate of change of the supply air temperature is greater than the supply air rate threshold and / or the rate of change of the return air temperature is greater than the return air rate threshold includes: When the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator defrosts based on a preset first defrosting time. When the rate of change of the supply air temperature is greater than the supply air rate threshold, or the rate of change of the return air temperature is greater than the return air rate threshold, the refrigerator defrosts based on a preset second defrost duration; wherein, the first defrost duration is greater than the second defrost duration.
7. The method as described in claim 4, characterized in that, The refrigerator has a heating element installed on the evaporator side. The step of controlling the refrigerator to start defrosting when the rate of change of the supply air temperature is greater than the supply air rate threshold and / or the rate of change of the return air temperature is greater than the return air rate threshold includes: When the rate of change of the supply air temperature is greater than the supply air rate threshold and the rate of change of the return air temperature is greater than the return air rate threshold, the heating component is controlled according to the first heating temperature to control the defrosting of the refrigerator. When the rate of change of the supply air temperature is greater than the supply air rate threshold, or the rate of change of the return air temperature is greater than the return air rate threshold, the heating component is controlled according to the second heating temperature to control the defrosting of the refrigerator; wherein, the first heating temperature is greater than the second heating temperature.
8. The method as described in claim 4, characterized in that, The air supply rate threshold is obtained through the following steps: Determine the first running time between the refrigerator's normal operation and the frosting condition, whether the refrigerator is running unloaded or fully loaded. Obtain the reference air supply temperature when the refrigerator is operating normally, and determine the air supply temperature difference between the air supply temperature under the frosting condition and the reference air supply temperature. The air supply rate threshold is determined based on the air supply temperature difference and the first operating time.
9. The method as described in claim 4, characterized in that, The return air rate threshold is obtained through the following steps: Determine the second running time between the refrigerator's normal operation and the frosting condition, whether the refrigerator is running unloaded or fully loaded. Obtain the reference return air temperature during normal refrigerator operation, and determine the return air temperature difference between the return air temperature under frosting conditions and the reference return air temperature. The return air rate threshold is determined based on the return air temperature difference and the second operating time.
10. A refrigerator, characterized in that, The refrigerator includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the refrigerator as described in any one of claims 1 to 9.
11. A vehicle, characterized in that, include: Vehicle body; The refrigerator as claimed in claim 10, wherein the refrigerator is disposed on the vehicle body.
12. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the refrigerator control method as described in any one of claims 1 to 9.
13. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the steps of the refrigerator control method as described in any one of claims 1 to 9.