Defrosting failure detection method for a storage device and storage device

Abstract

The application discloses a defrosting fault detection method of a storage equipment and the storage equipment, and belongs to the technical field of electrical appliances. The storage equipment comprises a box body, a compressor, an evaporator, a first fan, a second fan, a temperature sensor, a defrosting sensor and defrosting heating wires. The method comprises the following steps: acquiring a temperature measurement value and a cooling speed of an interval room; when the cooling speed or the frost amount of the evaporator meets defrosting entering conditions, controlling the defrosting heating wires to work; in the working process of the defrosting heating wires, acquiring a temperature change value and an ice point length of the defrosting sensor, and performing defrosting fault detection according to the temperature change value and the ice point length of the defrosting sensor. Through the working process of the defrosting heating wires, the temperature change value and the ice point length of the defrosting sensor are acquired, and the defrosting fault detection is performed according to the temperature change value and the ice point length of the defrosting sensor, so that the defrosting fault can be found in time, and the defrosting efficiency and the energy-saving effect are improved.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, and in particular relates to a defrosting fault detection method for a storage device and the storage device itself. Background Technology

[0002] In existing technologies, as the volume of storage equipment increases, the amount of frost also increases. During the defrosting process, there are problems such as long defrosting time, high operating power of heating wires, long cycles, heating wire failure, and ice blockage in the storage equipment. Summary of the Invention

[0003] This application proposes a defrosting fault detection method and storage device for storage equipment, in order to solve the problems in related technologies where defrosting time is long, heating wire power is high, cycle is long, heating wire failure occurs, and ice blockage occurs in storage equipment.

[0004] In a first aspect, this application provides a defrosting fault detection method for a storage device, the storage device comprising: a housing forming a compartment; a compressor disposed within the housing; an evaporator disposed within the housing; a first fan disposed at the rear end of the evaporator; a second fan disposed at the front end of the evaporator; a temperature sensor for measuring the temperature of the compartment; a defrosting sensor for measuring the temperature near a defrosting heating wire; a defrosting heating wire disposed at the bottom of the evaporator; and the evaporator, the first fan, and the second fan disposed within an air duct of the housing.

[0005] The method includes:

[0006] Obtain the temperature measurement value and cooling rate of the chamber;

[0007] The compressor, the first fan, and the second fan are controlled to start and stop based on the measured temperature value, the cooling rate, the preset start-up temperature, and the preset shutdown temperature.

[0008] When the cooling rate or the amount of frost on the evaporator meets the defrosting entry conditions, the defrosting heating wire is controlled to operate.

[0009] During the operation of the defrosting heating wire, the temperature change value and freezing point duration of the defrosting sensor are acquired, and defrosting fault detection is performed based on the temperature change value and freezing point duration of the defrosting sensor.

[0010] The defrosting fault detection method for storage equipment provided in this application obtains the temperature measurement value and cooling rate of the compartment. Based on the temperature measurement value, cooling rate, preset start-up temperature and shutdown temperature, the compressor, first fan and second fan are controlled to start and stop. When the cooling rate or the amount of frost on the evaporator meets the defrosting entry conditions, the defrosting heating wire is controlled to work. During the operation of the defrosting heating wire, the temperature change value and freezing point duration of the defrosting sensor are obtained. Based on the temperature change value and freezing point duration of the defrosting sensor, defrosting fault detection is performed, which can detect defrosting faults in a timely manner, improving defrosting efficiency and energy saving effect.

[0011] According to one embodiment of this application, the defrosting fault detection based on the temperature change value and freezing point duration of the defrosting sensor includes:

[0012] If the temperature change value is less than the preset defrost rate value, the defrost heating wire is determined to be faulty.

[0013] Alternatively, if the freezing point duration exceeds the preset defrosting freezing point duration, the defrosting heating wire is determined to be faulty.

[0014] In the above technical solution, if the temperature change value is less than the preset defrosting rate value or the freezing point duration is greater than the preset defrosting freezing point duration, the defrosting heating wire is determined to be faulty. This can detect defrosting faults in a timely manner, reduce the losses caused by defrosting failure due to defrosting heating wire failure, and improve defrosting efficiency and energy saving effect.

[0015] According to one embodiment of this application, after determining that the defrosting heating wire is faulty, the method further includes:

[0016] Entering defrost fault mode, the compressor is controlled to operate according to the shortest cooling cycle. After the cooling process is completed, the compressor is controlled to stop and the first fan or the second fan is controlled to run at a first speed, which is lower than the rated speed of the first fan or the second fan.

[0017] In the above technical solution, when the defrosting heating wire is determined to be faulty, the compressor is controlled to run at the shortest cooling cycle and then shut down. The first fan or the second fan is controlled to run at the first speed, which can realize air defrosting, reduce the losses caused by defrosting failure due to defrosting heating wire failure, and improve defrosting efficiency and energy saving effect.

[0018] According to one embodiment of this application, obtaining the temperature change value and freezing point duration of the defrosting sensor includes:

[0019] The amount of frost on the evaporator is determined based on the speed ratio of the first fan and the second fan.

[0020] Based on the amount of frost, determine the temperature change value and freezing point duration of the defrosting sensor.

[0021] In the above technical solution, the amount of frost on the evaporator is determined based on the rotation speed of the first fan and the rotation speed of the second fan. The temperature change value and freezing point duration of the defrost sensor are further determined, which can detect defrost faults in a timely manner, improve defrost efficiency, and reduce the losses caused by defrost failure due to defrost heating wire failure.

[0022] According to one embodiment of this application, the method further includes:

[0023] Obtain the compressor speed and determine the cooling capacity based on the compressor speed;

[0024] The theoretical cooling rate of the compartment is determined based on the cooling capacity, the volume of the compartment, the speed of the first fan, and the speed of the second fan.

[0025] The cooling rate is calibrated based on the theoretical cooling rate.

[0026] In the above technical solution, the cooling capacity is determined by obtaining the compressor speed. Based on the cooling capacity, the compartment volume, the speed of the first fan, and the speed of the second fan, the theoretical cooling rate of the compartment is determined. The cooling rate is calibrated based on the theoretical cooling rate, which can verify the cooling rate in a timely manner and reduce the possibility of low cooling efficiency of the storage equipment due to an insufficient cooling rate.

[0027] According to one embodiment of this application, the cooling rate satisfies the defrosting initiation condition, including:

[0028] The cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition.

[0029] In the above technical solution, by determining whether the cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition, it is determined that the cooling rate meets the defrosting entry condition, which can perform defrosting in a timely manner, improve defrosting efficiency, and reduce the possibility that the storage equipment will have low refrigeration efficiency due to the cooling rate being too small.

[0030] According to one embodiment of this application, the method further includes:

[0031] The amount of frost on the evaporator is determined based on the rotational speed of the first fan and the rotational speed of the second fan.

[0032] The amount of frost on the evaporator meets the defrosting entry conditions, including:

[0033] The amount of frost on the evaporator reaches the second preset value.

[0034] In the above technical solution, the amount of frost on the evaporator is determined based on the rotation speed of the first fan and the rotation speed of the second fan. By judging whether the amount of frost on the evaporator reaches the second preset value, it is determined that the defrosting entry condition is met, and defrosting can be carried out in a timely manner, which improves the defrosting efficiency and reduces the possibility that the storage equipment will have low refrigeration efficiency due to the slow cooling rate.

[0035] According to one embodiment of this application, the method further includes:

[0036] When the temperature measurement value of the defrosting sensor reaches the third preset value, the defrosting heating wire is controlled to stop working and the second fan runs at a preset speed.

[0037] In the above technical solution, when the temperature measurement value of the defrost sensor reaches the third preset value, the defrost heating wire is controlled to stop working and the second fan runs at a preset speed. Turning off the defrost heating wire in advance can reduce the energy consumption of the whole machine, reduce the impact of defrost speed and defrost heat on the temperature rise of the compartment, and the second fan running at a preset speed can make the defrost heat fully exchange with the frost layer of the evaporator, realize the reuse of defrost heat, reduce defrost time, and improve defrost efficiency and energy saving effect.

[0038] According to one embodiment of this application, the method further includes:

[0039] After the second fan runs at a preset speed for a first period of time, it is determined whether the temperature measurement value of the defrost sensor meets the defrost end condition, or the temperature change value of the defrost sensor is obtained and it is determined whether the temperature change value of the defrost sensor meets the defrost end condition.

[0040] Defrosting ends when the temperature measurement value or temperature change value of the defrost sensor meets the defrosting termination condition.

[0041] If neither the temperature measurement value nor the temperature change value of the defrost sensor meets the defrost termination condition, the defrost heating wire is controlled to operate at a first preset start-up rate, which is determined based on the speed ratio of the first fan and the second fan.

[0042] In the above technical solution, the defrosting end condition is determined by obtaining the temperature measurement value or defrosting speed of the defrosting sensor. If the defrosting end condition is met, the defrosting ends. If the defrosting end condition is not met, the defrosting heating wire is controlled to run at the first preset start-up rate. This can stop defrosting in time or reduce the power consumption of the whole machine while meeting the defrosting requirements, thereby improving defrosting efficiency and energy saving effect.

[0043] According to one embodiment of this application, the temperature measurement value or temperature change value of the defrost sensor satisfies the defrost termination condition, including:

[0044] The temperature measurement value of the defrosting sensor reaches the fourth preset value; or...

[0045] The temperature change value of the defrosting sensor reaches the fifth preset value.

[0046] In the above technical solution, by determining that the defrosting sensor temperature measurement value reaches the fourth preset value or the defrosting speed reaches the fifth preset value, the defrosting termination condition is met, and the defrosting is terminated. This can stop defrosting in a timely manner, reduce the overall energy consumption and the impact of defrosting heat on the temperature rise of the compartment, and improve defrosting efficiency and energy saving effect.

[0047] Secondly, this application provides a defrosting fault detection device for storage equipment, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the defrosting fault detection method for storage equipment as described in the first aspect above.

[0048] Thirdly, this application provides a storage device, comprising: a housing forming a compartment; a compressor disposed within the housing; an evaporator disposed within the housing; a first fan disposed at the rear end of the evaporator; a second fan disposed at the front end of the evaporator; a temperature sensor for measuring the temperature of the compartment; a defrost sensor for measuring the temperature near a defrost heating wire; a defrost heating wire disposed at the bottom of the evaporator; and a defrost fault detection device for the storage device as described in the second aspect above; wherein the evaporator, the first fan, and the second fan are disposed within an air duct of the housing.

[0049] Fourthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the defrosting fault detection method for storage devices as described in the first aspect above.

[0050] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the defrosting fault detection method for storage devices as described in the first aspect.

[0051] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the defrosting fault detection method for storage devices as described in the first aspect above.

[0052] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0053] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0054] Figure 1 This is one of the flowcharts illustrating a defrosting fault detection method for storage devices provided in some embodiments of this application;

[0055] Figure 2 These are schematic diagrams of the storage devices provided in some embodiments of this application;

[0056] Figure 3 This is a graph showing the temperature change over time of a defrosting sensor provided in some embodiments of this application;

[0057] Figure 4 This is a second schematic flowchart of a defrosting fault detection method for storage devices provided in some embodiments of this application;

[0058] Figure 5 This is a schematic diagram of the defrosting fault detection device for storage equipment provided in some embodiments of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 1: Storage equipment; 10: Box body; 20: Evaporator;

[0061] 30: First fan; 40: Second fan; 101: Cold storage room;

[0062] 102: Freezer compartment; 500: Defrosting fault detection device for storage equipment; 301: Processor;

[0063] 302: Memory. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0065] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0066] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0067] The defrosting fault detection method for storage devices provided in this application embodiment can be executed by a controller or a functional module or entity within the controller that can implement the defrosting fault detection method for the storage device. The controller mentioned in this application embodiment includes, but is not limited to, the controller in the storage device, the processor in the storage device, the edge server, the backend server, the cloud server, etc. The following uses the controller as the execution subject to illustrate the defrosting fault detection method for storage devices provided in this application embodiment.

[0068] The storage device in this embodiment can be understood as a refrigeration storage device in a broad sense, including but not limited to refrigerators, freezers, display cases, beverage cabinets, wine cabinets, refrigerated display cases, and refrigerated vending machines. The storage devices have diverse structural forms and a wide range of applications.

[0069] In related technologies, refrigeration systems are divided into air-cooled refrigeration systems and direct-cooled refrigeration systems. Direct-cooled refrigeration systems achieve cooling by cooling through an evaporator, while air-cooled refrigeration systems use a fan installed on the evaporator to circulate air in the refrigeration cycle and blow the air over the surface of the evaporator, causing the refrigerant to absorb heat and evaporate into a gaseous state. The fan helps maintain airflow inside the evaporator, thereby ensuring that the refrigerant on the evaporator surface can absorb enough heat and transfer it to the refrigeration cycle. The operation of the fan will cool down the refrigeration equipment.

[0070] In existing air-cooled refrigeration systems, the fan is typically installed at the rear of the evaporator. After the fan starts running, a low-pressure zone and a high-pressure zone are formed on the front and rear sides respectively. The pressure difference between them enables air circulation within the refrigerator compartment. The warmer air inside the refrigerator compartment passes through the return air vent, exchanges heat with the evaporator to become cooler air, and then passes through the fan and air duct outlet to cool the food inside the refrigerator compartment.

[0071] Because modern refrigerators prioritize large capacity and partitioned storage, the cooling compartments are large and multi-zoned. This results in a significant pressure drop and a noticeable decrease in air velocity within the compartments after the air is pressurized by the fan. Consequently, the air velocity is very low when the recirculated air reaches the return air vent. To ensure sufficient air passes through the evaporator and achieves adequate heat exchange, the cooling fan needs to operate at a higher speed to drive air circulation. This also increases the amount of frost buildup on the evaporator, as well as the power and defrosting time of the defrosting heating element. This increases the refrigerator's power consumption, the risk of defrosting heating element malfunction, and the risk of ice blockage, ultimately reducing the preservation effect.

[0072] To address the aforementioned problems, embodiments of this application provide a method for detecting defrosting faults in storage devices. The following, in conjunction with the accompanying drawings, provides a detailed description of the defrosting fault detection method and the storage device provided in this application through specific embodiments and application scenarios.

[0073] Figure 1 This is one of the flowcharts illustrating a defrosting fault detection method for storage devices provided in some embodiments of this application, such as... Figure 1 As shown, the defrosting fault detection method for the storage device includes steps 110, 120, 130 and 140.

[0074] Step 110: Obtain the temperature measurement value and cooling rate of the chamber;

[0075] The storage equipment includes a housing, a compressor, an evaporator, a first fan, a second fan, and a temperature sensor. The housing is used to form a compartment, and the compressor and evaporator are located inside the housing.

[0076] Figure 2 These are schematic diagrams of the structure of storage devices provided in some embodiments of this application, such as... Figure 2 As shown, the storage device 1 includes a housing 10, an evaporator 20, a first fan 30, a second fan 40, a compressor, and a temperature sensor (not shown in the figure). The housing 10 includes a refrigerator compartment 101 and a freezer compartment 102. The evaporator 20, the first fan 30, and the second fan 40 are disposed in the refrigerator air duct of the housing 10. The refrigerator air duct is provided with a return air inlet and an air outlet. The first fan 30 is disposed at the rear end of the evaporator, and the air outlet is located on the side close to the first fan 30. The second fan 40 is disposed at the front end of the evaporator, and the return air inlet is located on the side close to the second fan 40.

[0077] It is understandable that the compressor is one of the key components in storage device 1. It is usually electrically driven. The main function of the compressor is to draw in low-temperature, low-pressure refrigerant gas and compress it into high-temperature, high-pressure gas. During the compression of the refrigerant gas, the compressor can release heat and transfer the heat to the environment outside the storage device 1. The operation of the compressor will cause the storage device 1 to heat up.

[0078] Evaporator 20 absorbs heat from storage device 1 through the refrigerant evaporation process, and the operation of evaporator 20 will cool down storage device 1.

[0079] Optionally, the compartments include at least one of a refrigerated compartment, a variable temperature compartment, and a frozen compartment.

[0080] Temperature sensors are used to measure the temperature of a room. Temperature sensors can be thermistor sensors, semiconductor temperature sensors, digital temperature sensors, etc.

[0081] The defrost sensor is used to measure the temperature near the defrost heating wire. The defrost sensor can be an infrared temperature sensor, a resistance temperature probe, a thermistor, etc.

[0082] It should be noted that the evaporator 20, the first fan 30 and the second fan 40 are installed in the air duct of the housing 10. The air duct is provided with a return air port and an air outlet. The first fan 30 is located at the rear end of the evaporator 20 and the air outlet is located on the side close to the first fan 30. The second fan 40 is located at the front end of the evaporator 20 and the return air port is located on the side close to the second fan 40.

[0083] It is worth noting that the storage device in this embodiment can be a vending machine, and the temperature of the vending machine's compartment can be below 0 degrees Celsius. In some embodiments, the temperature of the vending machine's compartment can be from -5°C to -30°C, such as -25°C. The vending machine is used to sell frozen items, such as ice cream and ice cubes.

[0084] It's easy to understand that the controller acquires the temperature measurement values ​​from the room's temperature sensor in real time, and calculates the cooling rate based on the temperature measurement values ​​and time. For example, the controller acquires the temperature measurement difference T within a preset time period t, and the formula for calculating the cooling rate v is as follows:

[0085]

[0086] Where t represents the preset time period, T represents the temperature difference over the preset time period, and v represents the cooling rate over the preset time period.

[0087] Step 120: Control the start and stop of the compressor, the first fan and the second fan according to the measured temperature value, the cooling rate, the preset start-up temperature and the shutdown temperature;

[0088] Furthermore, the controller determines whether the room temperature has reached the preset compressor start-up temperature based on the temperature measurement value. If the temperature measurement value has not reached the start-up temperature, it determines whether the temperature measurement value is greater than the preset compressor shutdown temperature. If the temperature measurement value is greater than the preset compressor shutdown temperature, it controls the compressor not to start and starts the first fan 30 or the second fan 40. After a period of time, it determines whether the temperature measurement value has reached the compressor shutdown temperature. When the temperature measurement value reaches the shutdown temperature, it shuts down the first fan 30 or the second fan 40. If the temperature measurement value has not reached the shutdown temperature, it controls the compressor to run at low speed until the temperature measurement value reaches the shutdown temperature, then controls the compressor to stop, the first fan 30 to stop, and the second fan 40 to stop.

[0089] If the measured temperature reaches the start-up temperature, the compressor and the first fan 30 are started. It is then determined whether the cooling rate is greater than the first threshold. If the cooling rate is greater than the first threshold, the second fan 40 is stopped. If the cooling rate is less than or equal to the first threshold, the second fan 40 is started. It is then determined whether the cooling rate exceeds the second threshold. If the cooling rate does not exceed the second threshold, the second fan 40 is upgraded to a higher speed. It is then determined whether the cooling rate exceeds the third threshold. If the cooling rate does not exceed the third threshold, the defrosting logic is executed.

[0090] Step 130: When the cooling rate or the amount of frost on the evaporator meets the defrosting start conditions, control the defrosting heating wire to operate;

[0091] In one embodiment of this application, the cooling rate satisfies the defrosting initiation condition, including:

[0092] The cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition.

[0093] It is easy to understand that when the cooling rate meets the defrosting entry conditions, the defrosting heating wire is controlled to work. For example, when the compressor, the first fan and the second fan are running at the same time, it is determined whether the cooling rate exceeds the first preset value corresponding to the defrosting entry conditions. If the cooling rate is less than or equal to the first preset value, it is determined that the storage equipment meets the defrosting entry conditions, and the defrosting heating wire is controlled to work to defrost the storage equipment.

[0094] In the above technical solution, by determining whether the cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition, it is determined that the cooling rate meets the defrosting entry condition, which can perform defrosting in a timely manner, improve defrosting efficiency, and reduce the possibility that the storage equipment will have low refrigeration efficiency due to the cooling rate being too small.

[0095] When the amount of frost on the evaporator meets the defrosting entry conditions, the defrosting heating wire is controlled to work. For example, when the amount of frost on the evaporator reaches the second preset value, it is determined that the storage device meets the defrosting entry conditions, and the defrosting heating wire is controlled to work.

[0096] Step 140: During the operation of the defrosting heating wire, acquire the temperature change value and freezing point duration of the defrosting sensor, and perform defrosting fault detection based on the temperature change value and freezing point duration of the defrosting sensor.

[0097] It should be noted that during the operation of the defrosting heating wire, the controller acquires the temperature change value and freezing point duration of the defrosting sensor in real time. The defrosting speed can be obtained from the temperature change value, and the freezing point duration is the length of time the temperature measurement value remains at the freezing point. Defrosting fault detection is performed based on the actual temperature change value and freezing point duration of the defrosting sensor and the preset temperature change value and freezing point duration of the defrosting sensor.

[0098] The defrosting fault detection method for storage equipment provided in this application obtains the temperature measurement value and cooling rate of the compartment. Based on the temperature measurement value, cooling rate, preset start-up temperature and shutdown temperature, the compressor, first fan and second fan are controlled to start and stop. When the cooling rate or the amount of frost on the evaporator meets the defrosting entry conditions, the defrosting heating wire is controlled to work. During the operation of the defrosting heating wire, the temperature change value and freezing point duration of the defrosting sensor are obtained. Based on the temperature change value and freezing point duration of the defrosting sensor, defrosting fault detection is performed, which can detect defrosting faults in a timely manner, improving defrosting efficiency and energy saving effect.

[0099] In one embodiment of this application, the defrosting fault detection based on the temperature change value and freezing point duration of the defrosting sensor includes:

[0100] If the temperature change value is less than the preset defrost rate value, the defrost heating wire is determined to be faulty.

[0101] Alternatively, if the freezing point duration exceeds the preset defrosting freezing point duration, the defrosting heating wire is determined to be faulty.

[0102] Figure 3 This is a graph showing the temperature change over time of the defrosting sensor provided in some embodiments of this application, such as... Figure 3 As shown, during the defrosting process, the temperature change value of the defrost sensor (i.e., the defrosting rate) can be divided into three stages: the first stage is when the defrost sensor temperature is below the freezing point, and the temperature change value of the defrost sensor is K1; the second stage is when the defrost sensor temperature is at the freezing point, and the freezing point duration is T. 冰 The third stage is when the defrost sensor temperature is above the freezing point, and the temperature change value of the defrost sensor is K2.

[0103] Optionally, the controller acquires the temperature change value of the defrost sensor in real time, and determines that the defrost heating wire is faulty when the temperature change value is less than the preset value of the defrost rate.

[0104] Optionally, the controller acquires the freezing point duration, and if the freezing point duration exceeds the preset defrosting freezing point duration, it determines that the defrosting heating wire is faulty.

[0105] Optionally, the controller can acquire the temperature of the defrost sensor in real time, and determine that the defrost heating wire is faulty when the defrost sensor temperature does not change within a period of time.

[0106] In the above technical solution, if the temperature change value is less than the preset defrosting rate value or the freezing point duration is greater than the preset defrosting freezing point duration, the defrosting heating wire is determined to be faulty. This can detect defrosting faults in a timely manner, reduce the losses caused by defrosting failure due to defrosting heating wire failure, and improve defrosting efficiency and energy saving effect.

[0107] In one embodiment of this application, after determining that the defrosting heating wire is faulty, the method further includes:

[0108] Entering defrost fault mode, the compressor is controlled to operate according to the shortest cooling cycle. After the cooling process is completed, the compressor is controlled to stop and the first fan or the second fan is controlled to run at a first speed, which is lower than the rated speed of the first fan or the second fan.

[0109] Furthermore, after determining that the defrosting heating wire is faulty, the controller enters the defrosting fault mode, controls the compressor to run according to the shortest cooling cycle, and controls the compressor to stop after the cooling process is completed, and controls the first fan or the second fan to run at the first speed to perform air defrosting.

[0110] It should be noted that if the first speed is lower than the rated speed of the first or second fan, the controller will enter the defrosting fault mode and output the first prompt message, which is used to indicate the defrosting fault.

[0111] In the above technical solution, when the defrosting heating wire is determined to be faulty, the compressor is controlled to run at the shortest cooling cycle and then shut down. The first fan or the second fan is controlled to run at the first speed, which can realize air defrosting, reduce the losses caused by defrosting failure due to defrosting heating wire failure, and improve defrosting efficiency and energy saving effect.

[0112] In one embodiment of this application, obtaining the temperature change value and freezing point duration of the defrost sensor includes:

[0113] The amount of frost on the evaporator is determined based on the speed ratio of the first fan and the second fan.

[0114] Based on the amount of frost, determine the temperature change value and freezing point duration of the defrosting sensor.

[0115] It is easy to understand that the amount of frost on the evaporator can be determined based on the speed of the first fan and the speed of the second fan. For example, when the second fan starts and the first fan stops, the speed of the second fan is v3, and the speed of the first fan, which is passively operated due to the operation of the second fan, is v2. The formula for calculating the speed ratio N of the first fan and the second fan is as follows:

[0116]

[0117] It should be noted that the relationship between the speed ratio N of the first fan and the second fan and the amount of frost on the evaporator can be obtained through multiple experiments or simulations based on historical data. Thus, the amount of frost on the evaporator S can be determined by the speed ratio N of the first fan and the second fan.

[0118] Furthermore, based on the amount of frost on the evaporator, the temperature change value and freezing point duration of the defrost sensor are determined.

[0119] In the above technical solution, the amount of frost on the evaporator is determined based on the rotation speed of the first fan and the rotation speed of the second fan. The temperature change value and freezing point duration of the defrost sensor are further determined, which can detect defrost faults in a timely manner, improve defrost efficiency, and reduce the losses caused by defrost failure due to defrost heating wire failure.

[0120] In one embodiment of this application, the method further includes:

[0121] Obtain the compressor speed and determine the cooling capacity based on the compressor speed;

[0122] The theoretical cooling rate of the compartment is determined based on the cooling capacity, the volume of the compartment, the speed of the first fan, and the speed of the second fan.

[0123] The cooling rate is calibrated based on the theoretical cooling rate.

[0124] It is easy to understand that the theoretical cooling rate can be calculated based on the cooling capacity, the volume of the compartment, the speed of the first fan, and the speed of the second fan, as follows:

[0125] The controller obtains the compressor speed v1, and determines the cooling capacity m based on the compressor speed v1. The compressor speed v1 is directly proportional to the cooling capacity m. For example, the formula for calculating the cooling capacity m is as follows:

[0126] m = f(v1)

[0127] Where m represents the cooling capacity and v1 represents the compressor speed.

[0128] Based on the cooling capacity m, the compartment volume V, the rotational speed v2 of the first fan, and the rotational speed v3 of the second fan, the theoretical cooling rate v4 of the compartment is determined. The theoretical cooling rate v4 is directly proportional to the cooling capacity m, the rotational speed v2 of the first fan, and the rotational speed v3 of the second fan, and inversely proportional to the compartment volume V. For example, the formula for calculating the theoretical cooling rate v4 is as follows:

[0129] v4 = f(m, V, v3, v2)

[0130] Where m represents the cooling capacity, v2 represents the rotational speed of the first fan, v3 represents the rotational speed of the second fan, V represents the volume of the compartment, and v4 represents the theoretical cooling rate.

[0131] Furthermore, the controller acquires the temperature measurement values ​​from the room temperature sensor in real time, obtains the actual cooling rate based on the temperature measurement values ​​and time, and couples and calibrates the actual cooling rate with the theoretical cooling rate.

[0132] In the above technical solution, the cooling capacity is determined by obtaining the compressor speed. Based on the cooling capacity, the compartment volume, the speed of the first fan, and the speed of the second fan, the theoretical cooling rate of the compartment is determined. The cooling rate is calibrated based on the theoretical cooling rate, which can verify the cooling rate in a timely manner and reduce the possibility of low cooling efficiency of the storage equipment due to an insufficient cooling rate.

[0133] In one embodiment of this application, the method further includes:

[0134] The amount of frost on the evaporator is determined based on the rotational speed of the first fan and the rotational speed of the second fan.

[0135] The amount of frost on the evaporator meets the defrosting entry conditions, including:

[0136] The amount of frost on the evaporator reaches the second preset value.

[0137] It is easy to understand that the amount of frost on the evaporator can be determined based on the speed of the first fan and the speed of the second fan. For example, when the second fan starts and the first fan stops, the speed of the second fan is v3, and the speed of the first fan, which is passively operated due to the operation of the second fan, is v2. The formula for calculating the speed ratio N of the first fan and the second fan is as follows:

[0138]

[0139] It should be noted that the relationship between the speed ratio N of the first fan and the second fan and the frost amount S of the evaporator can be obtained by simulation based on multiple experiments or historical data. Thus, the frost amount S of the evaporator can be determined by the speed ratio N of the first fan and the second fan, and it can be judged whether the frost amount S of the evaporator has reached the second preset value. When the frost amount S of the evaporator reaches the second preset value, it is determined that the defrosting entry condition is met, and the defrosting heating wire is controlled to work.

[0140] In the above technical solution, the amount of frost on the evaporator is determined based on the rotation speed of the first fan and the rotation speed of the second fan. By judging whether the amount of frost on the evaporator reaches the second preset value, it is determined that the defrosting entry condition is met, and defrosting can be carried out in a timely manner, which improves the defrosting efficiency and reduces the possibility that the storage equipment will have low refrigeration efficiency due to the slow cooling rate.

[0141] In one embodiment of this application, the method further includes:

[0142] When the temperature measurement value of the defrosting sensor reaches the third preset value, the defrosting heating wire is controlled to stop working and the second fan runs at a preset speed.

[0143] It is easy to understand that during the defrosting process, the controller acquires the temperature measurement value of the defrosting sensor in real time. When the temperature measurement value of the defrosting sensor reaches the third preset value (e.g., 1 degree Celsius), the controller controls the defrosting heating wire to stop working. Since the defrosting heating wire and the second fan are both installed at the bottom of the evaporator, the controller starts the second fan to run at a preset speed, so that the remaining heat of the defrosting heating wire can circulate more effectively in the evaporator compartment.

[0144] It is worth noting that, in order to reduce heat transfer into the compartment and prevent large temperature fluctuations that could affect the preservation effect, the preset speed of the second fan is lower than the normal operating speed of the second fan.

[0145] In the above technical solution, when the temperature measurement value of the defrost sensor reaches the third preset value, the defrost heating wire is controlled to stop working and the second fan runs at a preset speed. Turning off the defrost heating wire in advance can reduce the energy consumption of the whole machine, reduce the impact of defrost speed and defrost heat on the temperature rise of the compartment, and the second fan running at a preset speed can make the defrost heat fully exchange with the frost layer of the evaporator, realize the reuse of defrost heat, reduce defrost time, and improve defrost efficiency and energy saving effect.

[0146] In one embodiment of this application, the method further includes:

[0147] After the second fan runs at a preset speed for a first period of time, it is determined whether the temperature measurement value of the defrosting sensor meets the defrosting end condition, or the defrosting speed is obtained and it is determined whether the defrosting speed meets the defrosting end condition.

[0148] Defrosting ends when the temperature measurement value of the defrost sensor or the defrost speed meets the defrost termination condition;

[0149] If neither the temperature measurement value of the defrost sensor nor the defrost speed meets the defrost termination condition, the defrost heating wire is controlled to operate at a first preset start-up rate.

[0150] Furthermore, when the defrosting heating wire is turned off, after the second fan runs at a preset speed for a first period of time, the controller acquires the temperature measurement value or defrosting speed of the defrosting sensor in real time, and determines whether the temperature measurement value or defrosting speed of the defrosting sensor meets the defrosting termination condition.

[0151] It should be noted that the defrosting speed can be calculated by the temperature rise rate of the defrosting sensor over a period of time, or by the defrosting speed of the evaporator.

[0152] In one embodiment of this application, the temperature measurement value of the defrost sensor or the defrost speed satisfies the defrost termination condition, including:

[0153] The temperature measurement value of the defrosting sensor reaches the fourth preset value; or...

[0154] The defrosting speed reaches the fifth preset value.

[0155] Optionally, when the temperature measurement value of the defrost sensor reaches the fourth preset value, it is determined that the temperature measurement value meets the defrost termination condition, and the defrost process ends.

[0156] Optionally, when the defrosting speed reaches the fifth preset value, it is determined that the defrosting speed meets the defrosting termination condition, and the defrosting process ends.

[0157] In the above technical solution, by determining that the defrosting sensor temperature measurement value reaches the fourth preset value or the defrosting speed reaches the fifth preset value, the defrosting termination condition is met, and the defrosting is terminated. This can stop defrosting in a timely manner, reduce the overall energy consumption and the impact of defrosting heat on the temperature rise of the compartment, and improve defrosting efficiency and energy saving effect.

[0158] If neither the temperature measurement value of the defrost sensor nor the defrost speed meets the defrost termination condition, the defrost heating wire is controlled to operate at the first preset start-up rate to continue defrosting.

[0159] In one embodiment of this application, the first preset operating rate is determined based on the speed ratio of the first fan and the second fan.

[0160] It is easy to understand that the first preset operating rate is determined based on the speed ratio of the first fan and the second fan. The relationship between the first preset operating rate and the speed ratio of the first fan and the second fan can be obtained through multiple experiments or simulations of historical data.

[0161] In the above technical solution, the first preset start-up rate is determined based on the speed ratio of the first fan and the second fan. This can reduce the power consumption of the whole machine while meeting the defrosting requirements, reduce the impact of defrosting heat on the temperature rise of the compartment, and improve defrosting efficiency and energy saving effect.

[0162] In the above technical solution, the defrosting end condition is determined by obtaining the temperature measurement value or defrosting speed of the defrosting sensor. If the defrosting end condition is met, the defrosting ends. If the defrosting end condition is not met, the defrosting heating wire is controlled to run at the first preset start-up rate. This can stop defrosting in time or reduce the power consumption of the whole machine while meeting the defrosting requirements, thereby improving defrosting efficiency and energy saving effect.

[0163] In one embodiment of this application, obtaining the defrosting speed includes:

[0164] Obtain the current speed of the first fan and the current speed of the second fan;

[0165] The current amount of frost on the evaporator is determined based on the current rotational speed of the first fan and the current rotational speed of the second fan.

[0166] The change in frosting amount is determined based on the current frosting amount and the frosting amount of the evaporator when defrosting begins;

[0167] The defrosting speed is determined based on the changes in frosting and the defrosting time.

[0168] The process is straightforward: the controller acquires the current speeds of the first and second fans, calculates the speed ratio between them, determines the current frost level S1 on the evaporator, and then calculates the frost change S2-S1 based on the current frost level S1 and the frost level S2 at the start of defrosting. Finally, it calculates the defrosting speed v based on the frost change S2-S1 and the defrosting duration T0. 化 The calculation formula is as follows:

[0169]

[0170] In the above technical solution, the defrosting speed is determined based on the amount of frost change and the defrosting time. The defrosting speed can be used to determine whether the defrosting end condition has been met, so that defrosting can be stopped in time or the power consumption of the whole machine can be reduced while meeting the defrosting requirements, thereby improving defrosting efficiency and energy saving effect.

[0171] In one embodiment of this application, controlling the start and stop of the compressor, the first fan, and the second fan based on the measured temperature value, the cooling rate, and the preset start-up and stop-down temperatures includes:

[0172] When the temperature measurement value of the chamber reaches the start-up temperature, the compressor and the first fan are controlled to start.

[0173] If the cooling rate exceeds the first threshold, the second fan is controlled to stop working;

[0174] Determine whether the measured temperature value has reached a first temperature. When the measured temperature value reaches the first temperature, control the compressor to stop, the first fan to stop, and the second fan to start. The first temperature is the sum of the shutdown point temperature and the first temperature value.

[0175] When the measured temperature reaches the shutdown point temperature, the second fan is controlled to stop.

[0176] It is easy to understand that the controller acquires the temperature measurement value of the room temperature sensor in real time, and controls the compressor and the first fan to start when the room temperature measurement value reaches the compressor start-up temperature.

[0177] After the compressor and the first fan have been running for a period of time t1, the controller obtains the cooling rate v5 of the room during the time period t1 and determines whether the cooling rate v5 is greater than the first threshold. The first threshold is the minimum cooling rate value that meets the cooling demand of the room. If the cooling rate v5 is greater than the first threshold, it means that the cooling rate can meet the cooling demand of the room at this time, and the second fan is controlled to stop working.

[0178] Furthermore, during the operation of the compressor and the first fan, the temperature sensor acquires the temperature measurement value of the chamber in real time and determines whether the temperature measurement value has reached the first temperature. The first temperature is the sum of the compressor shutdown point temperature and the first temperature value. For example, if the compressor shutdown point temperature is T1 and the first temperature value is 0.5 degrees Celsius, then the first temperature is T1 + 0.5 degrees Celsius. When the temperature measurement value reaches the first temperature T1 + 0.5 degrees Celsius, it indicates that the temperature in the chamber is close to the compressor shutdown point temperature at this time, and more cold energy is deposited at the bottom of the evaporator, close to the position of the second fan.

[0179] The controller stops the compressor and the first fan, and starts the second fan. The second fan continues to cool the room by utilizing the remaining cooling capacity of the evaporator in the room.

[0180] Furthermore, during the operation of the second fan, the temperature sensor acquires the temperature measurement value of the room in real time, determines whether the temperature measurement value has reached the shutdown point temperature, and controls the second fan to stop when the temperature measurement value reaches the shutdown point temperature.

[0181] In the above technical solution, when the temperature measurement value reaches the start-up temperature, the compressor and the first fan are started. When the cooling rate is greater than the first threshold, the second fan is stopped. This can reduce unnecessary energy consumption. By stopping the compressor and the first fan and starting the second fan when the temperature measurement value reaches the first temperature, the remaining cold energy is fully utilized, improving the air supply efficiency and preservation effect of the storage equipment, and reducing the energy consumption and noise of the storage equipment.

[0182] In one embodiment of this application, after controlling the compressor and the first fan to start when the temperature measurement value of the compartment reaches the start-up temperature, the method further includes:

[0183] If the cooling rate is less than or equal to the first threshold, control the second fan to start;

[0184] Determine whether the cooling rate exceeds a second threshold, wherein the second threshold is greater than the first threshold;

[0185] If the cooling rate exceeds the second threshold, determine whether the temperature measurement value has reached the first temperature. If the temperature measurement value reaches the first temperature, control the compressor to stop and the first fan to stop.

[0186] When the measured temperature reaches the shutdown point temperature, the second fan is controlled to stop.

[0187] It is easy to understand that the controller acquires the temperature measurement value of the room temperature sensor in real time, and controls the compressor and the first fan to start when the room temperature measurement value reaches the compressor start-up temperature.

[0188] After the compressor and the first fan have been running for a period of time t1, the controller obtains the cooling rate v5 of the room during the time period t1 and determines whether the cooling rate v5 is greater than the first threshold. The first threshold is the minimum cooling rate value that meets the cooling demand of the room. If the cooling rate v5 is less than or equal to the first threshold, it means that the cooling rate cannot meet the cooling demand of the room at this time, and the second fan is controlled to start.

[0189] After the compressor, the first fan, and the second fan have been running for a period of time t2, the controller obtains the cooling rate v6 of the room during the time period t2 and determines whether the cooling rate v6 is greater than the second threshold. The second threshold is the minimum cooling rate value that meets the cooling requirements of the room when the first fan and the second fan are working at the same time. The second threshold is greater than the first threshold.

[0190] When the cooling rate v6 exceeds the second threshold, the temperature sensor acquires the temperature measurement value of the chamber in real time and determines whether the temperature measurement value has reached the first temperature. When the temperature measurement value reaches the first temperature, it means that the temperature in the chamber is close to the compressor shutdown point temperature at this time, and more cold energy is deposited at the bottom of the evaporator, close to the position of the second fan. The compressor and the first fan are controlled to stop, while the second fan continues to run.

[0191] Furthermore, during the operation of the second fan, the temperature sensor acquires the temperature measurement value of the room in real time, determines whether the temperature measurement value has reached the shutdown point temperature, and controls the second fan to stop when the temperature measurement value reaches the shutdown point temperature.

[0192] In the above technical solution, when the cooling rate is less than or equal to the first threshold, the second fan is started, realizing adaptive control of the compartment temperature. The simultaneous operation of the first and second fans can reduce speed and temperature fluctuations, reduce noise, and improve refrigeration efficiency and preservation effect compared to the operation of a single fan alone.

[0193] In one embodiment of this application, after determining whether the cooling rate exceeds a second threshold, the method further includes:

[0194] If the cooling rate does not exceed the second threshold, control the second fan to operate at a higher speed;

[0195] Determine whether the cooling rate exceeds the third threshold;

[0196] If the cooling rate exceeds the third threshold, determine whether the temperature measurement value has reached the first temperature;

[0197] When the measured temperature reaches the first temperature, the compressor and the first fan are controlled to stop.

[0198] When the measured temperature reaches the shutdown point temperature, the second fan is controlled to stop.

[0199] It is easy to understand that after the compressor, the first fan and the second fan have been running for a period of time t2, the controller obtains the cooling rate v6 of the room during the time period t2 and determines whether the cooling rate v6 is greater than the second threshold. If the cooling rate does not exceed the second threshold, it means that the cooling rate cannot meet the cooling demand of the room at this time, and the controller controls the second fan to run at a higher speed. Running at a higher speed means increasing the speed or output power.

[0200] After the compressor, the first fan, and the upgraded second fan have been running for a period of time t3, the controller obtains the cooling rate v7 of the room during the time period t3 and determines whether the cooling rate v7 is greater than the third threshold. The third threshold is the minimum cooling rate value that meets the cooling requirements of the room when the first fan and the upgraded second fan are working at the same time. The third threshold is greater than the second threshold.

[0201] It should be noted that the embodiments of this application do not limit the number of times the second fan operates at higher speeds. For example, if the cooling rate of the room does not meet the minimum cooling rate value after the second fan has operated at a higher speed once, the second fan can continue to operate at a higher speed. In this case, the third threshold is the minimum cooling rate value that meets the cooling needs of the room when the first fan and the second fan after the last higher speed operation are working simultaneously. Gradually increasing the speed of the second fan can improve cooling efficiency and achieve energy-saving effects.

[0202] When the cooling rate v7 exceeds the third threshold, the temperature sensor acquires the real-time temperature measurement value of the chamber and determines whether the temperature measurement value has reached the first temperature. If the temperature measurement value reaches the first temperature, it indicates that the indoor temperature is close to the compressor shutdown point temperature, and more cooling energy is deposited at the bottom of the evaporator, near the second fan. The compressor and the first fan are then shut down, while the second fan continues to run, which improves air delivery efficiency.

[0203] Furthermore, during the operation of the second fan, the temperature sensor acquires the temperature measurement value of the room in real time, determines whether the temperature measurement value has reached the shutdown point temperature, and controls the second fan to stop when the temperature measurement value reaches the shutdown point temperature.

[0204] In the above technical solution, if the cooling rate does not exceed the second threshold, the second fan is controlled to operate at a higher speed. This allows for adaptive control of the room temperature based on actual cooling needs. Furthermore, the simultaneous operation of the first and second fans, compared to a single fan operating alone, can reduce fan speed and temperature fluctuations, decrease noise and overall energy consumption, and improve cooling efficiency and preservation effect.

[0205] In one embodiment of this application, after determining whether the temperature measurement value has reached a first temperature, the method further includes:

[0206] If the measured temperature does not reach the first temperature, the compressor is controlled to run at low speed until the measured temperature reaches the first temperature, at which point the compressor and the first fan are controlled to stop.

[0207] When the measured temperature reaches the shutdown point temperature, the second fan is controlled to stop.

[0208] It is easy to understand that if the temperature measurement value has not reached the first temperature, it means that the indoor temperature is still some distance away from the compressor shutdown point temperature and cooling is still required. The compressor is controlled to run at low speed until the temperature sensor detects that the temperature measurement value has reached the first temperature. Then, the compressor and the first fan are controlled to stop, while the second fan continues to run.

[0209] Furthermore, during the operation of the second fan, the temperature sensor acquires the temperature measurement value of the room in real time, determines whether the temperature measurement value has reached the shutdown point temperature, and controls the second fan to stop when the temperature measurement value reaches the shutdown point temperature.

[0210] In the above technical solution, when the temperature measurement value has not reached the first temperature, the compressor is controlled to run at a low speed, which can continue to cool the food while reducing energy consumption. This achieves adaptive control of the room temperature. Moreover, when the compressor runs at a low speed, the air speed is lower and the temperature fluctuation range is smaller, which reduces the possibility of high air speed blowing directly on the food and improves energy efficiency and preservation effect.

[0211] In one embodiment of this application, the third threshold is a first preset value corresponding to the defrosting entry condition.

[0212] If the cooling rate does not exceed the third threshold, it indicates that the evaporator may be over-iced, requiring the execution of defrosting logic. The third threshold is the first preset value corresponding to the defrosting entry condition described in the previous embodiment. It can be understood that if the cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition, the defrosting entry condition is met, and the defrosting process begins, i.e., the defrosting heating wire is controlled to operate.

[0213] In the above technical solution, the third threshold is the first preset value corresponding to the defrosting entry condition, and it can be determined whether the defrosting entry condition has been met based on the third threshold or the first preset value.

[0214] In one embodiment of this application, controlling the start and stop of the compressor, the first fan, and the second fan based on the measured temperature value, the cooling rate, and the preset start-up and stop-down temperatures includes:

[0215] If the measured temperature value does not reach the power-on temperature, determine whether the measured temperature value is greater than the set temperature.

[0216] When the measured temperature value is greater than the set temperature, the compressor is not started, and the first fan or the second fan is started.

[0217] Determine whether the measured temperature value has reached the shutdown point temperature;

[0218] When the measured temperature reaches the shutdown point temperature, the first fan or the second fan is turned off; or...

[0219] If the measured temperature does not reach the shutdown point temperature, the compressor is controlled to run at low speed until the measured temperature reaches the first temperature, at which point the compressor is controlled to stop, the first fan is stopped, and the second fan is started.

[0220] When the measured temperature reaches the shutdown point temperature, the second fan is turned off.

[0221] It is easy to understand that the controller acquires the temperature measurement value of the temperature sensor in the room in real time. If it detects that the temperature measurement value of the room has not reached the start-up temperature of the compressor, it determines whether the temperature measurement value is greater than the set temperature.

[0222] It should be noted that the set temperature should be lower than the compressor's start-up temperature but higher than the compressor's shutdown temperature. The set temperature can be adjusted according to the actual situation and scenario.

[0223] When the measured temperature is higher than the set temperature, the compressor is not started, but the first or second fan is started to reduce energy consumption. The controller obtains the temperature measurement value of the room temperature sensor in real time and determines whether the measured temperature has reached the shutdown point temperature. When the measured temperature reaches the shutdown point temperature, the first or second fan is turned off.

[0224] If the measured temperature does not reach the shutdown point, the compressor is controlled to run at low speed until the measured temperature reaches the first temperature. Then, the compressor and the first fan are stopped, and the second fan is started. When the measured temperature reaches the shutdown point, the second fan is turned off. The compressor running at low speed can ensure the operation of the refrigeration system. While ensuring that the cooling capacity is not wasted, energy saving and noise reduction can be achieved.

[0225] Figure 4 This is a second schematic flowchart of a defrosting fault detection method for storage devices provided in some embodiments of this application, such as... Figure 4 As shown, the defrosting fault detection method for the storage device includes the following steps: 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, and 490.

[0226] Step 210: The temperature sensor detects whether the indoor temperature has reached the compressor's start-up temperature;

[0227] Step 220: If the temperature measurement value does not reach the power-on temperature, determine whether the temperature measurement value is greater than the set temperature;

[0228] Step 230: If the measured temperature is greater than the set temperature, control the compressor not to start, and start the first fan or the second fan;

[0229] Step 240: Determine if the measured temperature has reached the shutdown temperature.

[0230] Step 250: When the temperature measurement value reaches the shutdown point temperature, turn off the first fan or the second fan;

[0231] Step 260: If the temperature measurement value has not reached the shutdown point temperature, control the compressor to run at low speed;

[0232] Step 270: Determine whether the temperature measurement value has reached the first temperature;

[0233] Step 280: When the temperature measurement value reaches the first temperature, control the compressor to stop, the first fan to stop, and the second fan to start;

[0234] Step 290: When the temperature measurement value reaches the shutdown point temperature, turn off the second fan;

[0235] Step 300: If the temperature measurement value reaches the start-up temperature, control the compressor and the first fan to start;

[0236] Step 310: Determine if the cooling rate is greater than the first threshold.

[0237] Step 320: If the cooling rate is greater than the first threshold, control the second fan to stop working and jump to step 270;

[0238] Step 330: If the cooling rate is less than or equal to the first threshold, control the second fan to start;

[0239] Step 340: Determine whether the cooling rate exceeds the second threshold.

[0240] Step 350: If the cooling rate does not exceed the second threshold, control the second fan to operate at a higher speed;

[0241] It should be noted that if the cooling rate exceeds the second threshold, proceed to step 270;

[0242] Step 360: Determine if the cooling rate exceeds the third threshold;

[0243] Step 370: If the cooling rate does not exceed the third threshold, determine that the defrosting entry conditions are met, control the defrosting heating wire to work, and jump to step 400;

[0244] It should be noted that if the cooling rate exceeds the third threshold, proceed to step 270;

[0245] Step 380: Determine the amount of frost on the evaporator based on the rotational speed of the first fan and the rotational speed of the second fan;

[0246] Step 390: Determine whether the amount of frost on the evaporator has reached the second preset value. If it has, control the defrosting heating wire to work.

[0247] Step 400: Obtain the temperature change value and freezing point duration from the defrosting sensor;

[0248] Step 410: Determine whether the temperature change value of the defrost sensor is less than the preset value of the defrost rate;

[0249] Step 420: Determine if the freezing point duration is greater than the preset defrosting freezing point duration;

[0250] Step 430: Defrosting heating wire malfunction, entering defrosting fault mode;

[0251] Step 440: Determine whether the temperature measurement value of the defrosting sensor has reached the third preset value;

[0252] Step 450: When the temperature measurement value of the defrost sensor reaches the third preset value, control the defrost heating wire to stop working and the second fan to run at the preset speed;

[0253] Step 460: After the second fan has been running at a preset speed for a first period of time, determine whether the temperature measurement value of the defrosting sensor has reached the fourth preset value;

[0254] Step 470: After the second fan has been running at a preset speed for a first period of time, determine whether the defrosting speed has reached the fifth preset value;

[0255] Step 480: When the temperature measurement value of the defrost sensor reaches the fourth preset value, or when the defrost speed reaches the fifth preset value, the defrosting process ends.

[0256] Step 490: Otherwise, control the defrosting heating wire to operate at the first preset start-up rate.

[0257] In the above technical solution, if the temperature measurement value does not reach the start-up temperature, it is determined whether the temperature measurement value is greater than the set temperature; if the temperature measurement value is greater than the set temperature, the start and stop of the compressor, the first fan and the second fan are controlled to achieve a short-term cooling and temperature reduction, so that the temperature in the room reaches the compressor shutdown temperature, thereby improving the cooling efficiency and reducing the overall energy consumption of the unit.

[0258] In some embodiments, such as Figure 5 As shown, this application embodiment also provides a defrosting fault detection device 500 for storage equipment, including a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the program is executed by the processor 301, it implements the various processes of the above-described defrosting fault detection method embodiment for storage equipment and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0259] The defrosting fault detection device 500 for storage devices in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific type of device.

[0260] The defrosting fault detection device 500 for storage equipment in this embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0261] The defrosting fault detection device 500 for storage equipment provided in this application embodiment can achieve... Figure 1 or Figure 4The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0262] This application embodiment also provides a storage device, including: a housing forming a compartment; a compressor disposed within the housing; an evaporator disposed within the housing; a first fan disposed at the rear end of the evaporator; a second fan disposed at the front end of the evaporator; a temperature sensor for measuring the temperature of the compartment; a defrost sensor for measuring the temperature near the defrost heating wire; a defrost heating wire disposed at the bottom of the evaporator; and a control device for the storage device as described in the above embodiment; the evaporator, the first fan, and the second fan are disposed within the air duct of the housing.

[0263] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described defrosting fault detection method embodiment for storage devices and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0264] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0265] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the defrosting fault detection method for the storage device described above.

[0266] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0267] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described defrosting fault detection method embodiment for storage devices, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0268] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0269] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0270] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the related technology, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0271] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0272] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0273] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for detecting defrosting faults in storage equipment, characterized in that, The storage device includes: a housing forming a compartment; a compressor disposed within the housing; an evaporator disposed within the housing; a first fan disposed at the rear end of the evaporator; a second fan disposed at the front end of the evaporator; a temperature sensor for measuring the temperature of the compartment; a defrost sensor for measuring the temperature near the defrost heating wire; a defrost heating wire disposed at the bottom of the evaporator; and the evaporator, the first fan, and the second fan disposed within the air duct of the housing. The method includes: Obtain the temperature measurement value and cooling rate of the chamber; The compressor, the first fan, and the second fan are controlled to start and stop based on the measured temperature value, the cooling rate, the preset start-up temperature, and the preset shutdown temperature. When the cooling rate or the amount of frost on the evaporator meets the defrosting entry conditions, the defrosting heating wire is controlled to operate. During the operation of the defrosting heating wire, the temperature change value and freezing point duration of the defrosting sensor are acquired, and defrosting fault detection is performed based on the temperature change value and freezing point duration of the defrosting sensor.

2. The defrosting fault detection method for storage equipment according to claim 1, characterized in that, The defrosting fault detection based on the temperature change value and freezing point duration of the defrosting sensor includes: If the temperature change value is less than the preset defrost rate value, the defrost heating wire is determined to be faulty. Alternatively, if the freezing point duration exceeds the preset defrosting freezing point duration, the defrosting heating wire is determined to be faulty.

3. The defrosting fault detection method according to claim 2, characterized in that, After determining that the defrosting heating wire is faulty, the method further includes: Entering defrost fault mode, the compressor is controlled to operate according to the shortest cooling cycle. After the cooling process is completed, the compressor is controlled to stop and the first fan or the second fan is controlled to run at a first speed, which is lower than the rated speed of the first fan or the second fan.

4. The defrosting fault detection method according to claim 2 or 3, characterized in that, The process of acquiring the temperature change value and freezing point duration of the defrosting sensor includes: The amount of frost on the evaporator is determined based on the speed ratio of the first fan and the second fan. Based on the amount of frost, determine the temperature change value and freezing point duration of the defrosting sensor.

5. The defrosting fault detection method for storage equipment according to claim 1, characterized in that, The method further includes: Obtain the compressor speed and determine the cooling capacity based on the compressor speed; The theoretical cooling rate of the compartment is determined based on the cooling capacity, the volume of the compartment, the speed of the first fan, and the speed of the second fan. The cooling rate is calibrated based on the theoretical cooling rate. The cooling rate satisfies the defrosting entry conditions, including: The cooling rate is less than or equal to the first preset value corresponding to the defrosting entry condition.

6. The defrosting fault detection method for storage equipment according to claim 1, characterized in that, The method further includes: The amount of frost on the evaporator is determined based on the rotational speed of the first fan and the rotational speed of the second fan. The amount of frost on the evaporator meets the defrosting entry conditions, including: The amount of frost on the evaporator reaches the second preset value.

7. The defrosting fault detection method for storage equipment according to any one of claims 1-6, characterized in that, The method further includes: When the temperature measurement value of the defrosting sensor reaches the third preset value, the defrosting heating wire is controlled to stop working and the second fan runs at a preset speed.

8. The defrosting fault detection method for storage equipment according to claim 7, characterized in that, The method further includes: After the second fan runs at a preset speed for a first period of time, it is determined whether the temperature measurement value of the defrost sensor meets the defrost end condition, or the temperature change value of the defrost sensor is obtained and it is determined whether the temperature change value of the defrost sensor meets the defrost end condition. Defrosting ends when the temperature measurement value or temperature change value of the defrost sensor meets the defrosting termination condition. If neither the temperature measurement value nor the temperature change value of the defrost sensor meets the defrost termination condition, the defrost heating wire is controlled to operate at a first preset start-up rate, which is determined based on the speed ratio of the first fan and the second fan.

9. The defrosting fault detection method for storage equipment according to claim 8, characterized in that, The temperature measurement value or temperature change value of the defrost sensor satisfies the defrost termination condition, including: The temperature measurement value of the defrosting sensor reaches the fourth preset value; or... The temperature change value of the defrosting sensor reaches the fifth preset value.

10. A storage device, characterized in that, include: The box-like structure forms compartments; A compressor is located inside the housing; an evaporator is located inside the housing; and a first fan is located at the rear end of the evaporator. A second fan is located at the front end of the evaporator; a temperature sensor is used to measure the temperature of the compartment; a defrost sensor is used to measure the temperature near the defrost heating wire; the defrost heating wire is located at the bottom of the evaporator; And a defrosting fault detection device for storage equipment, the defrosting fault detection device for storage equipment includes a memory, a processor and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the defrosting fault detection method for storage equipment as described in any one of claims 1-9; the evaporator, the first fan and the second fan are disposed in the air duct of the housing.

Images