Refrigerator Fault Control Methods and Systems

Abstract

This invention provides a refrigerator fault control method and system. The method includes acquiring cooling cycle data and compartment operation data, wherein the cooling cycle is the cycle from compressor start-up to shutdown; then detecting the state of a temperature sensor, which includes a normal state or a fault state. If the state is a fault state, fault mode control of the compartment is executed based on the cooling cycle data and compartment operation data. The fault mode control includes controlling the cooling time, cooling cycle, and compressor speed. Data for each compartment can be calculated based on the cooling data during normal refrigerator operation, and used to perform individual temperature control on each compartment when a refrigerator fault occurs, thereby precisely controlling the compartment temperature.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigerator fault control method and system. Background Technology

[0002] Temperature sensors are installed in different compartments of the refrigerator. These sensors detect the temperature, allowing the refrigerator's control system to adjust the temperature according to the needs of each compartment. Furthermore, by sensing the temperature, the control system can control the operation of the refrigeration components. Temperature sensors can also indirectly detect refrigerator malfunctions; for example, detecting abnormal temperatures may indicate a problem with the refrigeration system.

[0003] When the temperature sensor malfunctions, in order to maintain a certain refrigeration and freezing function, the refrigerator enters a fault operation mode. The fault operation modes include a fixed temperature cooling mode, a cooling cycle mode based on a fixed time, and a default safe temperature operation mode.

[0004] However, if the ambient temperature is different, the cooling cannot be adjusted according to the room temperature, or the temperature compensation strategy cannot be implemented, the fault operation mode cannot accurately control the room temperature, resulting in a low room temperature. Summary of the Invention

[0005] This application provides a refrigerator fault control method and system to solve the problem of low compartment temperature caused by fault operation mode.

[0006] In a first aspect, this application provides a refrigerator fault control method, including:

[0007] Acquire cooling cycle data and compartment operation data, wherein the cooling cycle is the cycle from compressor start-up to shutdown;

[0008] The status of the temperature sensor is detected, including normal status or fault status.

[0009] If the state is a fault state, the fault mode control of the compartment is performed based on the cooling cycle data and the compartment operation data. The fault mode control includes the control of cooling time, cooling cycle and compressor speed.

[0010] In some feasible embodiments, acquiring cooling cycle data and compartment operation data includes:

[0011] In response to the refrigerator start command, at the beginning of the cooling cycle, the operating data of the cooling cycle is recorded. The operating data includes cooling time, number of cycles, total compressor speed, first compressor speed, second compressor speed, third compressor speed, total compressor duration, first duration, second duration, third duration, first fan speed, second fan speed, and third fan speed.

[0012] The recording time is the time during which the running data is recorded.

[0013] If the recorded time is greater than or equal to the preset number of days, and the end point of the cooling cycle is detected, cooling cycle data is generated based on the operating data, and room operating data is calculated based on the operating data.

[0014] In some feasible embodiments, the step of generating cooling cycle data based on the operating data if the recorded time is greater than or equal to a preset number of days and the end point of the cooling cycle is detected includes:

[0015] If the recorded time is greater than or equal to the preset number of days, and the end point of the cooling cycle is detected, obtain the door opening data and defrosting command;

[0016] If door opening data or defrosting command is obtained, or if the cooling cycle is the first cycle, delete the running data of the cooling cycle. The first cycle is the first cycle after the defrosting command is obtained.

[0017] In some feasible embodiments, the compartment operation data includes first compartment operation data, which includes first compartment cooling time, first average rotation speed, and refrigeration average rotation speed;

[0018] The computational room operation data includes:

[0019] Obtain the cooling time of the first compartment, which is the start time of the refrigeration fan;

[0020] The first average speed is calculated based on the cooling time of the first compartment, the speed of the first compressor, and the first duration.

[0021] The average rotational speed of the refrigeration unit is calculated based on the rotational speed of the first fan and the cooling time of the first compartment.

[0022] In some feasible embodiments, the compartment operation data includes second compartment operation data, which includes second compartment cooling time, second average speed, and variable temperature average speed.

[0023] The computational room operation data includes:

[0024] Obtain the cooling time of the second compartment, which is the start time of the variable temperature fan;

[0025] The second average speed is calculated based on the second compartment cooling time, the second compressor speed, and the second duration.

[0026] The average rotational speed for temperature variation is calculated based on the second fan speed and the cooling time of the second compartment.

[0027] In some feasible embodiments, the compartment operation data includes third compartment operation data, which includes third compartment cooling time, third average rotation speed, and average freezing rotation speed.

[0028] The computational room operation data includes:

[0029] The cooling time of the third compartment is obtained, wherein the cooling time of the third compartment is the start-up time of the refrigeration fan;

[0030] The third average speed is calculated based on the cooling time of the third compartment, the speed of the third compressor, and the third duration.

[0031] The average refrigeration speed is calculated based on the speed of the third fan and the cooling time of the third compartment.

[0032] In some feasible embodiments, the refrigeration cycle data includes the average cycle time and the average compressor speed;

[0033] The generation of cooling cycle data based on the operational data includes:

[0034] Calculate the average cycle time based on the cooling time and the number of cycles;

[0035] The average compressor speed is calculated based on the total compressor speed and the total compressor duration.

[0036] In some feasible embodiments, if the state is a fault state, performing fault mode control of the compartment based on the cooling cycle data and the compartment operation data includes:

[0037] If the state is a fault state, obtain the first ambient temperature and the second ambient temperature. The first ambient temperature is the ambient temperature of the first cooling cycle, and the second ambient temperature is the ambient temperature of the next cooling cycle of the first cooling cycle.

[0038] If the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature, the average speed of the first compressor in the compartment is calculated, and the average speed of the first compressor is adjusted to the average speed of the second compressor, so as to perform fault mode control of the compartment based on the average speed of the second compressor, wherein the average speed of the second compressor is greater than the average speed of the first compressor.

[0039] If the difference between the second ambient temperature and the first ambient temperature is less than or equal to the preset temperature, the average speed of the first compressor in the compartment is calculated, and the average speed of the first compressor is adjusted to the average speed of the third compressor, so as to perform fault mode control of the compartment based on the average speed of the second compressor, wherein the average speed of the third compressor is less than the average speed of the first compressor.

[0040] In some feasible embodiments, the step of performing fault mode control of the compartment based on the cooling cycle data and the compartment operation data includes:

[0041] If the temperature sensors of a preset number of compartments are in a fault state, calculate the cooling time of the first compartment, the cooling time of the second compartment, and the cooling time of the third compartment;

[0042] A rotating cooling cycle is set based on the cooling time of the first compartment, the cooling time of the second compartment, and the cooling time of the third compartment, so as to perform fault mode control of the compartment based on the rotating cooling cycle. The cooling cycle of the fault mode is the average cooling cycle, and the compressor speed of the fault mode is the average compressor speed or the first average speed, the second average speed, and the third average speed.

[0043] Secondly, this application provides a refrigerator fault control system, comprising:

[0044] The acquisition unit is used to acquire refrigeration cycle data and compartment operation data, wherein the refrigeration cycle is the cycle from compressor start-up to shutdown; and to detect the status of the temperature sensor, wherein the status includes normal status or fault status.

[0045] If the state is a fault state, the fault control unit performs fault mode control of the compartment based on the cooling cycle data and the compartment operation data. The fault mode control includes the control of cooling time, cooling cycle and compressor speed.

[0046] As can be seen from the above technical solutions, this application provides a refrigerator fault control method and system. The method includes acquiring cooling cycle data and compartment operation data, wherein the cooling cycle is the cycle from compressor start-up to shutdown; then detecting the state of the temperature sensor, the state including normal state or fault state; if the state is a fault state, performing compartment fault mode control based on the cooling cycle data and compartment operation data, the fault mode control including control of cooling time, cooling cycle, and compressor speed. Data for each compartment can be calculated based on the cooling data during normal refrigerator operation, used for separate temperature control of each compartment when a refrigerator fault occurs, thereby precisely controlling the compartment temperature. Attached Figure Description

[0047] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A schematic flowchart of a refrigerator fault control method provided in an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of the operational data processing flow provided in the embodiments of this application;

[0050] Figure 3 This is a schematic diagram illustrating the process of adjusting the compressor speed based on ambient temperature according to the fault mode, as provided in an embodiment of this application. Detailed Implementation

[0051] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0052] When a refrigerator temperature sensor malfunctions, and the refrigerator is in a fixed-time cooling cycle mode, regardless of which sensor malfunctions, some refrigerators will enter a fixed fault operation mode, cooling the refrigerator and freezer compartments for a period of time according to a pre-given schedule, and then stopping for a certain period of time, and so on, in a cooling cycle.

[0053] In high-temperature environments, refrigerators have difficulty dissipating heat, and the refrigeration system takes a long time to reach the set temperature. In low-temperature environments, however, refrigerators dissipate heat quickly and may reach a lower temperature without the set refrigeration time. However, a fixed-time refrigeration cycle mode does not adjust the refrigeration time according to the ambient temperature, which can easily lead to over-cooling in low-temperature environments, causing the room temperature to be too low.

[0054] Furthermore, different usage scenarios will cause different changes in the room temperature. For example, frequent opening and closing of the door or putting in a large amount of hot food will cause the room temperature to rise. However, when in a cooling cycle mode based on a fixed time, the cooling will continue for a fixed time regardless of how the room temperature actually changes. If the room temperature is already low for some reason, the cooling will continue for a fixed time, which will cause the temperature to drop even lower.

[0055] Temperature compensation involves fine-tuning the refrigeration system based on factors such as ambient temperature to ensure stable room temperature. Fixed-time refrigeration cycle mode lacks this mechanism, and therefore cannot reduce the cooling capacity accordingly when the ambient temperature drops, resulting in excessively low room temperature.

[0056] When in fault code display and limited function mode, some refrigerators are equipped with a fault self-diagnosis function. When the temperature sensor malfunctions, the corresponding fault code will appear on the refrigerator's display screen. The refrigerator may maintain some basic cooling functions, but it will not be able to achieve precise temperature control. Users can find the corresponding fault information according to the fault code and contact a repairman for inspection.

[0057] When the refrigerator is in fault code mode or limited function mode, many of its normal functions are restricted, and it may not be able to flexibly adjust cooling power and time according to changes in ambient and compartment temperatures. For example, it cannot precisely control the compressor's operating frequency and start / stop time, and can only operate in a limited number of fixed modes, making it difficult to adapt to complex temperature changes and potentially causing over-cooling in certain environments.

[0058] Furthermore, fault code prompts and limited function modes are mainly used to indicate faults and maintain basic functions. They have relatively low requirements for temperature control accuracy, and only cool according to the set rules without considering the slight changes in ambient temperature and actual room temperature. This can easily lead to excessively long cooling time or excessive cooling power, resulting in excessively low room temperature.

[0059] When in the default safe temperature operating mode, some refrigerators may set the refrigeration system to operate at the default safe temperature after the temperature sensor malfunctions. For example, the refrigerator compartment temperature is set to a higher safe temperature to prevent food from spoiling, and the freezer compartment temperature is set to a lower safe temperature to ensure food is frozen and preserved. However, this mode cannot be optimized and adjusted according to the actual food storage conditions and ambient temperature.

[0060] The default safe temperature operating mode is suitable for preventing food spoilage and other problems. It sets the room temperature to a low level to ensure food safety in case of failure. However, it does not take into account the diversity of ambient temperature and actual room temperature requirements. Without considering the ambient temperature, the refrigeration system operates at a low default temperature, which can easily lead to excessively low room temperature when the ambient temperature is low.

[0061] Furthermore, it does not adjust the cooling parameters according to real-time changes in ambient temperature and compartment temperature, but maintains a fixed cooling state. When the ambient temperature drops, the refrigerator does not reduce the cooling capacity, which leads to a continuous drop in compartment temperature during the continuous cooling process.

[0062] In summary, these faulty operating modes cannot accurately control the room temperature, resulting in low room temperature.

[0063] This application provides a refrigerator fault control method in some embodiments, which can calculate the data of each compartment based on the refrigeration data when the refrigerator is running normally, and use it to control the temperature of each compartment separately when the refrigerator malfunctions, thereby accurately controlling the compartment temperature.

[0064] like Figure 1 As shown, the method includes the following steps:

[0065] S100: Acquires cooling cycle data and room operation data.

[0066] The method provided in this embodiment is applied to a refrigerator. It is understood that the refrigerator has multiple compartments, such as a refrigerator compartment and a freezer compartment. Some refrigerators also have a variable temperature compartment. In this embodiment, the refrigerator compartment, freezer compartment and variable temperature compartment are used for illustration. During the operation of the refrigerator, different compartments have different temperature requirements. In order to accurately control the temperature of different compartments, temperature sensors are installed in the compartments.

[0067] Temperature sensors are used to detect the temperature inside the compartment and transmit the detected temperature information to the refrigerator's control system. After receiving the temperature information, the refrigerator's control system can issue instructions to the refrigeration system or the temperature compensation system according to the preset temperature, so that the refrigeration system can cool or the temperature compensation system can compensate for the temperature, so that the temperature of different compartments is within the preset range.

[0068] The refrigerator comprises a refrigeration system to produce a cooling effect, a cooling system to maintain a low-temperature environment, a control system to control the temperature and humidity inside the refrigerator, and a cabinet to provide storage space. It is understood that the refrigeration system, cooling system, and control system include specific components that achieve the aforementioned functions.

[0069] In some embodiments, the refrigeration system includes a compressor, a condenser, an evaporator, and a throttling device. The compressor compresses the refrigerant gas, increasing its pressure and temperature, thereby propelling the refrigerant through the system. During compression, the refrigerant changes from a low-pressure, high-temperature gas to a high-pressure, high-temperature gas, thus producing a cooling effect. The condenser cools the high-temperature, high-pressure gas discharged from the compressor into a liquid state. Heat is released through heat sinks, and the refrigerant gas transforms into a liquid state, ready to enter the next step of the refrigeration cycle. The evaporator absorbs heat in the refrigeration system. The refrigerant evaporates from a liquid state to a gaseous state in the evaporator, absorbing heat from the surrounding environment, thereby lowering the internal temperature of the refrigerator. The throttling device may include an expansion valve and a capillary tube, used to regulate the refrigerant flow rate and reduce its pressure, making it a low-temperature, low-pressure gas-liquid mixture, ready to enter the evaporator.

[0070] In some embodiments, the cooling system includes a fan connected to the evaporator. The fan circulates air within compartments, such as the freezer and refrigerator compartments, transferring heat to the evaporator to help maintain a low-temperature environment inside the refrigerator.

[0071] The compressor in the refrigeration system is a variable frequency compressor. A variable frequency compressor can automatically adjust its operating speed according to changes in cooling demand. It converts a fixed-frequency power supply into a variable-frequency power supply, thereby changing the speed of the compressor motor. When the cooling demand is high, the inverter increases the power frequency, causing the compressor motor to speed up and increasing the cooling capacity. When the cooling demand is low, the inverter decreases the power frequency, causing the compressor motor to slow down and reducing the cooling capacity.

[0072] In this embodiment, one start-stop cycle of the inverter compressor is considered as a refrigeration cycle. When the temperature inside the refrigerator rises to the set upper limit, the temperature sensor will send a signal to start the inverter compressor. The inverter compressor gradually accelerates from a stationary state to quickly increase the cooling capacity and lower the temperature inside the refrigerator.

[0073] After the compressor starts, it enters the operation phase. Based on the actual temperature inside the refrigerator and the cooling demand, the inverter compressor adjusts the motor speed through the inverter, thereby changing the amount of cooling capacity. If the temperature inside the refrigerator is high and the heat load is large, the compressor will run at a higher speed to provide a larger cooling capacity; as the temperature gradually decreases and approaches the set temperature, the compressor speed will slow down to maintain a lower cooling capacity and keep the temperature stable.

[0074] When the temperature inside the refrigerator drops to the set lower limit, the temperature sensor will send a signal again to stop the inverter compressor from running, at which point the cooling process will pause. During the cooling process, the fans and dampers corresponding to each compartment of the refrigerator will open, and the electric valves will switch to the corresponding compartment side. For example, when the refrigerator compartment is cooling, the refrigerator fan and refrigerator damper will open, and the electric valves will switch to the refrigerator side.

[0075] It is understandable that when one start-stop cycle of the inverter compressor is considered a refrigeration cycle, the running time within that cycle is not fixed. For example, in high-temperature environments, the refrigerator has difficulty dissipating heat, and the internal temperature rises rapidly. The compressor needs to start frequently and run for longer periods, resulting in a shorter refrigeration cycle and increased running time. Conversely, in low-temperature environments, the refrigerator dissipates heat easily, and the internal temperature rises slowly, resulting in a longer refrigeration cycle and reduced running time.

[0076] During operation, the refrigerator acquires the temperature and related load status of each compartment, thereby collecting refrigeration cycle data and compartment operation data. In some embodiments, such as Figure 2As shown, in response to the refrigerator start command, at the beginning of the cooling cycle, the operating data of the cooling cycle is recorded, and the recording time is counted. The recording time is the time for recording the operating data. If the recording time is greater than or equal to a preset number of days, and the end point of the cooling cycle is detected, cooling cycle data is generated based on the operating data, and compartment operating data is calculated based on the operating data.

[0077] When the refrigerator starts, it begins recording at the beginning of each cooling cycle, i.e., the time when the inverter compressor starts cooling. When the refrigerator starts, it monitors the compressor's operating status through sensors and records the operating data, including cooling time, number of cycles, total compressor speed, first compressor speed, second compressor speed, third compressor speed, total compressor duration, first duration, second duration, third duration, first fan speed, second fan speed, and third fan speed.

[0078] The cooling time is the cooling cycle time within the preset time and T. total The number of cycles is the number of cycles T within a preset time period. count T is calculated using the following formula total :

[0079]

[0080] Among them, T i This refers to the duration of the cooling cycle.

[0081] T is calculated using the following formula. count :

[0082]

[0083] The average cooling cycle time is calculated using the following formula:

[0084] T ave =T total ÷T count .

[0085] The first compressor speed is the compressor speed when the refrigerator compartment is refrigerating, and the first duration is the compressor speed duration when the refrigerator compartment is refrigerating. Similarly, the second compressor speed is the compressor speed when the variable temperature compartment is refrigerating, and the second duration is the compressor speed duration when the variable temperature compartment is refrigerating. The third compressor speed is the compressor speed when the freezer compartment is refrigerating, and the second duration is the compressor speed duration when the freezer compartment is refrigerating.

[0086] The total compressor speed is the compressor speed within a preset time, the total compressor duration is the compressor speed duration within a preset time, and the total compressor start-up time within a preset time can also be obtained, i.e., the summation.

[0087] After acquiring the operating data, the time for recording this operating data is recorded. When the recording time reaches or exceeds a preset number of days, which can be 10 days, 20 days, 30 days, etc., and the end of the current cooling cycle is detected, the recorded operating data is processed and analyzed. Cooling cycle data is generated through calculation and organization, such as average cooling time, average compressor speed, etc., and room operating data is calculated based on the operating data.

[0088] By analyzing the operational data, accurate cooling cycle data and compartment operation data can be generated, providing a basis for fault mode control and enabling the refrigerator to perform more precise compartment control when the temperature sensor malfunctions.

[0089] Regardless of whether the refrigerator is in normal or fault mode, users may open the door or the refrigerator may be defrosting during use. However, opening the door or defrosting has a significant impact on the cooling of the compartment. If this data is recorded, it will lead to an inability to accurately control the temperature. Therefore, in some embodiments, if the recording time is greater than or equal to a preset number of days and the end point of the cooling cycle is detected, the door opening data and defrosting command are obtained; if the door opening data or defrosting command is obtained or the cooling cycle is the first cycle, the running data of the cooling cycle is deleted.

[0090] The door opening data includes information about the refrigerator door's opening status, such as the time, duration, and number of times it was opened. The defrost command is a signal issued by the refrigerator control system to initiate the defrost program. It triggers the refrigerator's defrost function to remove frost from the evaporator surface and ensure cooling performance. The defrost command may include parameters such as defrost mode and defrost duration.

[0091] The first cycle is the first cycle after the defrost command is received. It is determined based on the order of the refrigerator defrost command and the cooling cycle. After the control system issues the defrost command, the next cooling cycle is the first cycle. The refrigerator's operating status during this cycle is greatly affected by the defrost process, which may affect the accuracy of the data. Therefore, the operating data of this cooling cycle will be deleted.

[0092] By eliminating interference from special situations such as door opening and defrosting, the operating data reflects the refrigerator's operation under normal cooling conditions, improving the accuracy of cooling cycle data and compartment operation data, thereby enabling precise temperature control.

[0093] The first fan speed is the average speed of the refrigerator compartment fan within a preset time period, the second fan speed is the average speed of the variable temperature compartment fan within a preset time period, and the third fan speed is the average speed of the freezer compartment fan within a preset time period.

[0094] In some embodiments, the compartment operation data includes first compartment operation data, which includes first compartment cooling time, first average speed, and average refrigeration speed.

[0095] Calculate the operational data of the room, including:

[0096] Obtain the cooling time of the first compartment, which is the start time of the refrigeration fan;

[0097] For the cold storage room, the cooling time of the cold storage room within a cooling cycle is defined as the on-time of the refrigeration fan within a cooling cycle.

[0098]

[0099] T lc_ave =T lc_total ÷T count ;

[0100] Among them, T lc_i T represents the refrigeration time of the refrigerator compartment during the refrigeration cycle. lc_total T represents the total cooling time of the refrigerator compartment. lc_ave This represents the average cooling time of the refrigerator compartment.

[0101] The first average speed is calculated based on the first compartment cooling time, the first compressor speed, and the first duration.

[0102] The first compartment is a refrigerator compartment. The average compressor speed S during refrigeration in the refrigerator compartment is... lc_ave :

[0103]

[0104] Among them, Slc i The compressor speed during the refrigerator compartment's cooling process within a preset time period, tonlc i The duration of compressor speed during the refrigeration of the refrigerator compartment within a preset time.

[0105] Calculate the average refrigeration speed F based on the first fan speed and the first compartment cooling time. lc_av See the following formula for calculation:

[0106]

[0107] Among them, F lc_i The speed of the refrigeration fan during refrigeration of the refrigerator compartment, i.e., the speed of the first fan, t lc_i T represents the duration of cooling in the refrigerator compartment. lc_total This represents the total cooling time for the refrigerator compartment.

[0108] The compartment operation data includes second compartment operation data, which includes second compartment cooling time, second average speed, and variable temperature average speed.

[0109] The computational room operation data includes:

[0110] Obtain the cooling time of the second compartment, which is the start time of the variable temperature fan;

[0111] For a variable temperature room, the cooling time of the variable temperature fan within a cooling cycle is defined as the time during which the variable temperature fan is turned on.

[0112]

[0113] T bw_ave =T bw_total ÷T count ;

[0114] Among them, T bw_i The cooling time of the variable temperature chamber during the cooling cycle, T bw_total T represents the total cooling time of the variable temperature greenhouse. bw_ave This represents the average cooling time of the variable temperature greenhouse.

[0115] The second average speed is calculated based on the second compartment cooling time, the second compressor speed, and the second duration.

[0116]

[0117] Among them, Sbw i The compressor speed during cooling of the variable temperature compartment within a preset time period, tombw i The compressor speed duration during cooling in the variable temperature compartment within a preset time period.

[0118] Based on the second fan speed and the second compartment cooling time, calculate the variable temperature average speed F. bw_ave See the following formula for calculation:

[0119] F bw_ave =(∑ i n ＝1 F bw_i ×t bw_i )÷T bw_total ;

[0120] Among them, F bw_i The speed of the variable temperature fan during cooling in the variable temperature chamber, t bw_i T represents the duration of cooling in the variable temperature chamber. bw_total This represents the total cooling time of the variable temperature greenhouse.

[0121] The compartment operation data includes the third compartment operation data, which includes the third compartment cooling time, the third average speed, and the average freezing speed.

[0122] The computational room operation data includes:

[0123] The cooling time of the third compartment is obtained, wherein the cooling time of the third compartment is the start-up time of the refrigeration fan;

[0124] For the freezer compartment, the cooling time of the freezer compartment within a cooling cycle is defined as the on-time of the refrigeration fan within one cooling cycle.

[0125]

[0126] T ld_ave =T ld_total ÷T count ;

[0127] Among them, T ld_i T is the cooling time of the freezer compartment in the cooling cycle. ld_total T represents the total cooling time of the freezer compartment. ld_ave This represents the average cooling time of the freezer compartment.

[0128] The third average speed is calculated based on the cooling time of the third compartment, the speed of the third compressor, and the third duration.

[0129]

[0130] Among them, Sld i The compressor speed during the freezer compartment's cooling process within a preset time period, tonld i The duration of compressor speed during the freezer compartment's cooling process within a preset time period.

[0131] Based on the speed of the third fan and the cooling time of the third compartment, the average refrigeration speed F is calculated. ld_ave See the following formula for calculation:

[0132]

[0133] Among them, F ld_i The refrigeration fan speed during refrigeration of the freezer compartment, t ld_i T represents the duration of cooling in the freezer compartment. ld_total This represents the total cooling time for the freezer compartment.

[0134] For a refrigerator compartment, the average cooling capacity is calculated using the following formula: P lc :

[0135]

[0136] Among them, Si The compressor speed (t) during refrigerator cooling. i The duration of cooling in the refrigerator compartment.

[0137] With a fixed average cooling capacity and average cooling time, the refrigeration fan speed F is adjusted. lc and compressor speed S lc Make it satisfy the following formula:

[0138] P lc =F lc ×T lc_ave +S lc ×T lc_ave ;

[0139] Adjust the speed of the refrigeration fan F lc and compressor speed S lc When adjusting the average value, you can start by increasing or decreasing it to make the above formula work. Considering that the compressor speed has a greater impact on the cooling capacity than the fan speed, you can adjust the fan speed first, and then adjust the compressor speed if the requirements are not met.

[0140] If the adjusted formula holds true, then the corresponding fan speed F lc and compressor speed S lc This refers to the operating speed of the fan and compressor when the refrigerator compartment is refrigerating under fault mode.

[0141] If the limit values ​​of the fan speed or compressor speed still do not satisfy the equation, then the limit values ​​are used as the final result.

[0142] Similarly, refer to the following formula to determine the fan speed and compressor speed of the variable temperature chamber and refrigeration chamber under fault mode.

[0143] For variable temperature rooms:

[0144] P bw =F bw ×T bw_ave +S bw ×T bw_ave ;

[0145] For the freezer compartment:

[0146] P ld =F ld ×T ld_ave +S ld ×T ld_ave .

[0147] In some embodiments, the refrigeration cycle data includes the average cycle time and the average compressor speed. The average cycle time is calculated based on the refrigeration time and the number of cycles, and the average compressor speed is calculated based on the total compressor speed and the total compressor duration.

[0148] average compressor speed S ave :

[0149]

[0150] Among them, S i The compressor speed within a preset time, Ton total The total compressor operating time within the preset time period, i.e., ton i The sum of all additions.

[0151] S200: Detects the status of the temperature sensor.

[0152] The status of the temperature sensor can be detected in various ways, such as the refrigerator's own diagnostic function. When the temperature sensor malfunctions, the refrigerator's main control board can detect the abnormal signal and output the corresponding fault code through the display screen or indicator light.

[0153] Some refrigerators also allow users to enter a diagnostic mode via a specific button combination. In diagnostic mode, the refrigerator executes a testing program and displays the status information of various components, such as the temperature sensor. This allows the refrigerator to detect the status of the temperature sensor.

[0154] It is understood that the state of the temperature sensor can be detected in various ways in this embodiment. No limitation is made here. Only the detection result, i.e., the state information of the temperature sensor, is received. The state includes normal state or fault state.

[0155] When the temperature sensor is functioning normally, it indicates that the sensor can detect the temperature of the compartment effectively and work in conjunction with the control system and the refrigeration system to control the temperature of the compartment, meaning no other steps are required. When the temperature sensor is malfunctioning, it indicates that the sensor cannot detect the temperature of the compartment effectively. When the control system cannot receive the temperature information sent by the sensor, it cannot accurately control the refrigeration system. In this embodiment, precise temperature control is achieved by executing step S300.

[0156] S300: If the status is faulty, execute fault mode control of the compartment based on cooling cycle data and compartment operation data.

[0157] Because different compartments are equipped with different temperature sensors, in some cases, the temperature sensors in all compartments are in a fault state. In this case, each compartment will execute a fault mode, that is, the refrigerator compartment, the variable temperature compartment, and the freezer compartment will all execute a fault mode.

[0158] In some embodiments, if the temperature sensors of a preset number of compartments are in a fault state, the cooling time of the first compartment, the cooling time of the second compartment, and the cooling time of the third compartment are calculated.

[0159] A rotating cooling cycle is set based on the cooling time of the first compartment, the cooling time of the second compartment, and the cooling time of the third compartment, so as to perform fault mode control of the compartment based on the rotating cooling cycle. The cooling cycle of the fault mode is the average cooling cycle, and the compressor speed of the fault mode is the average compressor speed or the first average speed, the second average speed, and the third average speed.

[0160] The preset number is the number of compartments. If the refrigerator has compartments including a refrigerator compartment, a variable temperature compartment, and a freezer compartment, the preset number is three. If the refrigerator has compartments including a refrigerator compartment and a freezer compartment, the preset number is two. In other words, the temperature sensor status of the preset number of compartments is in a fault state, meaning that the temperature sensor status of all compartments is in a fault state.

[0161] When all temperature sensors in all compartments are in a fault state, the compartments can be cooled in turn according to the calculated average cooling time of each compartment, namely the cooling time of the first compartment, the cooling time of the second compartment, and the cooling time of the third compartment. For the cooling cycle, the cooling time can be set for different compartments. For example, the refrigerator compartment is cooled for 10 minutes, then the cooling of the refrigerator compartment is stopped, then the freezer compartment is cooled for 15 minutes, then the cooling of the freezer compartment is stopped, then the variable temperature compartment is cooled for 8 minutes, and so on.

[0162] In this embodiment, the fault mode compartments are refrigerated using a combination of a refrigerator compartment, a variable temperature compartment, a freezer compartment, and a shutdown-cycle cooling system. The average cooling cycle time T calculated above is used. ave As a cooling cycle under fault mode, T is used ave T lc T bw T ld The downtime during the cooling cycle.

[0163] Fault mode control includes the control of cooling time, cooling cycle, and compressor speed.

[0164] Regarding compressor speed, the compressor speed of each compartment can be determined according to S. ave Overall control can also be achieved by measuring the average rotational speed S of each compartment. lc_ave S bw_ave S ld_ave To take control.

[0165] If only one temperature sensor in a compartment is faulty, the fault mode will be applied only to that compartment, while the temperature sensors in other compartments that are functioning normally will be controlled according to the currently set start and stop points.

[0166] During the refrigeration process, ambient temperature significantly impacts the refrigerator's cooling demand. When the ambient temperature rises, the refrigerator requires more cooling capacity to maintain a stable compartment temperature; conversely, when the ambient temperature falls, the cooling demand decreases accordingly. By monitoring changes in ambient temperature and adjusting the compressor speed accordingly, the refrigerator can operate efficiently under different environmental conditions, ensuring both cooling performance and energy savings. Therefore, to improve temperature control accuracy, the influence of ambient temperature must be considered.

[0167] like Figure 3 As shown, in some embodiments, if the state is a fault state, a first ambient temperature and a second ambient temperature are obtained, where the first ambient temperature is the ambient temperature of the first cooling cycle and the second ambient temperature is the ambient temperature of the next cooling cycle of the first cooling cycle.

[0168] If the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature, the average speed of the first compressor in the compartment is calculated, and the average speed of the first compressor is adjusted to the average speed of the second compressor, so as to perform fault mode control of the compartment based on the average speed of the second compressor, wherein the average speed of the second compressor is greater than the average speed of the first compressor.

[0169] If the difference between the second ambient temperature and the first ambient temperature is less than the preset temperature, the average speed of the first compressor in the compartment is calculated, and the average speed of the first compressor is adjusted to the average speed of the third compressor, so as to perform fault mode control of the compartment based on the average speed of the second compressor, wherein the average speed of the third compressor is less than the average speed of the first compressor.

[0170] In the event of a temperature sensor failure, the control system acquires the ambient temperatures for the first and next cooling cycles (i.e., the first and second ambient temperatures) from the ambient temperature sensor. The difference between the second and first ambient temperatures is calculated and compared to a preset temperature. If the difference is greater than the preset temperature, indicating an increase in ambient temperature, the average speed of the first compressor is calculated and adjusted to a higher average speed for the second compressor according to established rules. If the difference is less than the preset temperature, indicating a decrease in ambient temperature, the average speed of the first compressor is calculated and adjusted to a lower average speed for the third compressor. The adjusted average speed of either the second or third compressor is then applied to the fault mode control of the compartment, causing the compressor to operate at the new speed.

[0171] By detecting the ambient temperature and adjusting the compressor speed during fault mode, the temperature of each compartment can be precisely controlled.

[0172] Based on the above-described refrigerator fault control method, some embodiments of this application also provide a refrigerator fault control system, including:

[0173] The acquisition unit is used to acquire refrigeration cycle data and compartment operation data, wherein the refrigeration cycle is the cycle from compressor start-up to shutdown; and to detect the status of the temperature sensor, wherein the status includes normal status or fault status.

[0174] If the state is a fault state, the fault control unit performs fault mode control of the compartment based on the cooling cycle data and the compartment operation data. The fault mode control includes the control of cooling time, cooling cycle and compressor speed.

[0175] This application provides a refrigerator fault control method and system. The method includes acquiring cooling cycle data and compartment operation data, wherein the cooling cycle is the cycle from compressor start-up to shutdown; then detecting the state of a temperature sensor, which includes a normal state or a fault state. If the state is a fault state, fault mode control of the compartment is executed based on the cooling cycle data and compartment operation data. The fault mode control includes controlling the cooling time, cooling cycle, and compressor speed. Data for each compartment can be calculated based on the cooling data during normal refrigerator operation, and used to perform individual temperature control on each compartment when a refrigerator fault occurs, thereby precisely controlling the compartment temperature.

[0176] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A refrigerator fault control method, characterized by, The method comprises: acquiring refrigeration cycle data and chamber operation data, the refrigeration cycle being a cycle from compressor start to stop; detecting a state of a temperature sensor, the state comprising a normal state or a fault state; if the state is a fault state, performing fault mode control of the chamber based on the refrigeration cycle data and the chamber operation data, the fault mode control comprising control of refrigeration time, refrigeration cycle, and compressor speed; the acquiring of the refrigeration cycle data and the chamber operation data comprises: in response to an instruction to start the refrigerator, recording operation data of the refrigeration cycle at a starting point of the refrigeration cycle, the operation data comprising refrigeration time, cycle number, total compressor speed, first compressor speed, second compressor speed, third compressor speed, total compressor duration, first duration, second duration, third duration, first fan speed, second fan speed, and third fan speed; counting a recording time, the recording time being a time of recording the operation data; if the recording time is greater than or equal to a preset number of days and a termination point of the refrigeration cycle is detected, generating refrigeration cycle data based on the operation data and calculating chamber operation data based on the operation data.

2. The refrigerator malfunction control method of claim 1, characterized by, the generating of the refrigeration cycle data based on the operation data if the recording time is greater than or equal to the preset number of days and the termination point of the refrigeration cycle is detected comprises: if the recording time is greater than or equal to the preset number of days and the termination point of the refrigeration cycle is detected, acquiring door opening data and defrosting instructions; if the door opening data or the defrosting instructions are acquired or the refrigeration cycle is a first cycle, deleting the operation data of the refrigeration cycle, the first cycle being a first cycle after the defrosting instructions are acquired. 3.The refrigerator malfunction control method of claim 1, wherein, the chamber operation data comprises first chamber operation data, the first chamber operation data comprising first chamber refrigeration time, first average speed, and refrigeration average speed; calculating the first chamber operation data comprises: acquiring the first chamber refrigeration time, the first chamber refrigeration time being an opening time of a refrigeration fan; calculating the first average speed based on the first chamber refrigeration time, the first compressor speed, and the first duration; calculating the refrigeration average speed based on the first fan speed and the first chamber refrigeration time.

4. The refrigerator malfunction control method of claim 1, wherein, the chamber operation data comprises second chamber operation data, the second chamber operation data comprising second chamber refrigeration time, second average speed, and variable temperature average speed; calculating the second chamber operation data comprises: acquiring the second chamber refrigeration time, the second chamber refrigeration time being an opening time of a variable temperature fan; calculating the second average speed based on the second chamber refrigeration time, the second compressor speed, and the second duration; calculating the variable temperature average speed based on the second fan speed and the second chamber refrigeration time. 5.The refrigerator failure control method of claim 1, wherein, the chamber operation data comprises third chamber operation data, the third chamber operation data comprising third chamber refrigeration time, third average speed, and freezing average speed; calculating the third chamber operation data comprises: acquiring the third chamber refrigeration time, the third chamber refrigeration time being an opening time of a freezing fan; calculating a third average speed based on the third chamber refrigeration time, the third compressor speed, and the third duration; calculating a freezing average speed based on the third fan speed and the third chamber refrigeration time. 6.The refrigerator failure control method of claim 1, wherein The refrigeration cycle data includes an average cycle time and a compressor average speed; The generating refrigeration cycle data based on the operation data includes: calculating an average cycle time based on the refrigeration time and the cycle number; calculating a compressor average speed based on the total compressor speed and the total compressor duration. 7.The refrigerator failure control method of claim 1, wherein The executing fault mode control of the chamber based on the refrigeration cycle data and the chamber operation data includes: if the state is a fault state, obtaining a first ring temperature and a second ring temperature, the first ring temperature being an ambient temperature of a first refrigeration cycle, and the second ring temperature being an ambient temperature of a next refrigeration cycle of the first refrigeration cycle; if a difference between the second ring temperature and the first ring temperature is greater than a preset temperature, calculating a first compressor average speed of the chamber, and adjusting the first compressor average speed to a second compressor average speed, to execute fault mode control of the chamber based on the second compressor average speed, the second compressor average speed being greater than the first compressor average speed; if the difference between the second ring temperature and the first ring temperature is less than or equal to the preset temperature, calculating a first compressor average speed of the chamber, and adjusting the first compressor average speed to a third compressor average speed, to execute fault mode control of the chamber based on the second compressor average speed, the third compressor average speed being less than the first compressor average speed. 8.The refrigerator failure control method of claim 1, wherein, The executing fault mode control of the chamber based on the refrigeration cycle data and the chamber operation data includes: if the state of a preset number of temperature sensors of the chamber is a fault state, calculating a first chamber refrigeration time, a second chamber refrigeration time, and a third chamber refrigeration time; setting a turn refrigeration cycle based on the first chamber refrigeration time, the second chamber refrigeration time, and the third chamber refrigeration time, to execute fault mode control of the chamber based on the turn refrigeration cycle, the fault mode refrigeration cycle being an average refrigeration cycle, and the fault mode compressor speed being a compressor average speed or a first average speed, a second average speed, a third average speed.

9. A refrigerator malfunction control system characterized by, The system is configured with the refrigerator fault control method of claim 1, and the system includes: an acquisition unit configured to acquire refrigeration cycle data and chamber operation data, the refrigeration cycle being a cycle from compressor start to stop, and to detect a state of a temperature sensor, the state including a normal state or a fault state; if the state is a fault state, a fault control unit executes fault mode control of the chamber based on the refrigeration cycle data and the chamber operation data, the fault mode control including control of refrigeration time, refrigeration cycle, and compressor speed.

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