Refrigerator and control method thereof

Abstract

The present invention discloses a refrigerator and a control method thereof. When it is determined that the temperature of the refrigeration drawer affects the detection result of the refrigeration temperature sensor, the real-time cooling rate of the refrigeration temperature sensor within a preset time period is calculated, and then the real-time cooling rate is compared with a preset standard cooling rate, and then the shutdown temperature is adjusted or the startup time of the compressor is adjusted, so that the temperature control of the refrigeration compartment is more reasonable, and the phenomenon that the excessively high or excessively low temperature of the refrigeration drawer affects the refrigeration temperature sensor, which leads to inaccurate temperature control of the refrigeration compartment, can be avoided. The deviation of the refrigeration temperature can be avoided, and the temperature of the refrigeration compartment can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a control method thereof. Background Art

[0002] Refrigerators use internal temperature sensors to sense compartment temperatures, such as the refrigerator compartment. The temperature of the refrigerator compartment is controlled by the compressor's on / off parameters. These on / off parameters, detected by the temperature sensor, are generally fixed and do not change with the settings of other refrigerator compartments. For refrigerators with separate refrigerator drawers, the temperature of the drawer is generally different from that of the rest of the refrigerator compartment. When the drawer's temperature is too low or too high, it interferes with the temperature sensor's sensing, causing the refrigerator compartment temperature to deviate from the set level. A typical solution to this problem is to add a barrier near the temperature sensor. However, this can make the temperature sensor less sensitive, making it impossible to accurately control the refrigerator temperature. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method thereof, which can prevent the refrigeration temperature from deviating and accurately control the temperature of the refrigeration chamber.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, wherein a storage compartment is formed in the box body, the storage compartment includes at least a refrigeration compartment and a freezer compartment, and a refrigeration drawer is provided in the refrigeration compartment;

[0006] A door, used for opening and closing the storage chamber;

[0007] A compressor is provided in the compressor compartment of the box body, and is used to compress the refrigerant flowing through the refrigeration cycle of the refrigerator to provide power for the refrigeration cycle. The compressor operates according to preset start-up temperature and shutdown temperature;

[0008] a refrigeration temperature sensor, disposed in the refrigeration chamber, for detecting the refrigeration temperature of the refrigeration chamber;

[0009] The controller is configured as:

[0010] When it is determined that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, calculating the real-time cooling rate of the refrigerated temperature sensor within a preset time period;

[0011] Obtaining refrigeration parameters of the refrigerator in the current operating state, and obtaining a pre-stored standard cooling rate corresponding to the refrigeration parameters;

[0012] Calculating the rate difference between the real-time cooling rate and the standard cooling rate;

[0013] When the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is adjusted or the startup time of the compressor is adjusted.

[0014] As an improvement to the above solution, the controller is further configured to:

[0015] A first refrigerated temperature and a second refrigerated temperature detected by the refrigerated temperature sensor at preset time intervals are respectively obtained, and a real-time cooling rate of the refrigerated temperature sensor is calculated according to the preset time period, the first refrigerated temperature and the second refrigerated temperature.

[0016] As an improvement to the above solution, the refrigerator further includes:

[0017] a drawer temperature sensor, disposed in the refrigerated drawer, for detecting the drawer temperature of the refrigerated drawer;

[0018] The controller is further configured to:

[0019] Acquiring the refrigeration temperature and the drawer temperature;

[0020] When the temperature difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, it is determined that the temperature of the refrigeration drawer has an impact on the detection result of the refrigeration temperature sensor;

[0021] When the temperature difference between the drawer temperature and the refrigeration temperature is less than or equal to the temperature difference threshold, it is determined that the temperature of the refrigeration drawer has no effect on the detection result of the refrigeration temperature sensor.

[0022] As an improvement to the above solution, the controller is further configured to:

[0023] When the difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, and the drawer temperature is lower than the refrigeration temperature, it is determined that the temperature of the refrigeration drawer has a low-temperature effect on the detection result of the refrigeration temperature sensor;

[0024] When the difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, and the drawer temperature is greater than the refrigeration temperature, it is determined that the temperature of the refrigeration drawer has a high temperature effect on the detection result of the refrigeration temperature sensor.

[0025] As an improvement to the above solution, the controller is further configured to:

[0026] After determining that the temperature of the refrigerated drawer has a low-temperature effect on the detection result of the refrigerated temperature sensor, when the rate difference is greater than a preset cooling rate threshold, lowering the shutdown temperature or extending the startup time of the compressor;

[0027] After determining that the temperature of the refrigerated drawer has a high temperature impact on the detection result of the refrigerated temperature sensor, when the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is increased or the startup time of the compressor is shortened.

[0028] As an improvement to the above solution, the refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer.

[0029] As an improvement to the above solution, the refrigeration parameters also include the load increase and the cumulative door opening time of the refrigeration chamber within a preset time.

[0030] To achieve the above-mentioned object, an embodiment of the present invention further provides a refrigerator control method, wherein the refrigerator is provided with a refrigeration chamber and a freezer chamber, the refrigeration chamber is provided with a refrigeration drawer, and the refrigeration chamber is provided with a refrigeration temperature sensor for detecting the refrigeration temperature; then, the controller is configured as follows:

[0031] When it is determined that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, calculating the real-time cooling rate of the refrigerated temperature sensor within a preset time period;

[0032] Obtaining refrigeration parameters of the refrigerator in the current operating state, and obtaining a pre-stored standard cooling rate corresponding to the refrigeration parameters;

[0033] The rate difference between the real-time cooling rate and the standard cooling rate is calculated, and when the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is adjusted or the startup time of the compressor is adjusted.

[0034] As an improvement to the above solution, the step of calculating the real-time cooling rate of the refrigeration temperature sensor within a preset time period includes:

[0035] A first refrigerated temperature and a second refrigerated temperature detected by the refrigerated temperature sensor after a preset time interval are respectively obtained, and a real-time cooling rate of the refrigerated temperature sensor is calculated according to the preset time period, the first refrigerated temperature and the second refrigerated temperature.

[0036] As an improvement to the above solution, the refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer.

[0037] Compared with the prior art, the refrigerator and control method thereof disclosed in the embodiment of the present invention, when determining that the temperature of the refrigeration drawer affects the detection result of the refrigeration temperature sensor, calculates the real-time cooling rate of the refrigeration temperature sensor within a preset time period, and then compares this real-time cooling rate with the preset standard cooling rate, and then adjusts the shutdown temperature or adjusts the startup time of the compressor, so that the temperature control of the refrigeration compartment is more reasonable, avoiding the phenomenon that the temperature of the refrigeration drawer is too high or too low and affects the refrigeration temperature sensor, which leads to inaccurate temperature control of the refrigeration compartment, and can avoid the deviation of the refrigeration temperature and accurately control the temperature of the refrigeration compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention when the door is closed;

[0039] Figure 2 1 is a schematic diagram of the storage compartment structure of a refrigerator provided by an embodiment of the present invention when the door is open;

[0040] Figure 3 1 is a schematic structural diagram of a refrigeration drawer in a refrigerator provided by an embodiment of the present invention;

[0041] Figure 4 1 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0042] Figure 5 This is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0043] Figure 6 is a second working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0044] Figure 7 is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0045] Figure 8 is a fourth working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0046] Figure 9 is a fifth working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0047] Figure 10 This is a flow chart of a refrigerator control method provided by an embodiment of the present invention.

[0048] Among them, 100, refrigerator; 10, refrigerator compartment; 20, freezer compartment; 30, refrigerator drawer; 31, drawer temperature sensor; 1, compressor; 2, evaporator; 3, capillary tube; 4, condenser. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] See also Figures 1-2, is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body that defines a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located on the outside of the box body, a door body liner located on the inside of the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a cavity, wherein the cavity includes a component storage cavity for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc. The storage space can be divided into a plurality of storage rooms, and the storage rooms can be configured as a refrigeration room 10 and a freezer room 20 according to different uses. The refrigeration room 10 is provided with at least one refrigeration drawer 30, and may also include a variable temperature room, a vacuum drawer, a moisturizing drawer, etc. Each storage room corresponds to one or more door bodies, for example, in Figure 1 The upper storage compartment is provided with a double-door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-style storage. A refrigeration temperature sensor is provided in the refrigeration compartment 10 for detecting the refrigeration temperature of the refrigeration compartment.

[0054] See also Figure 3 , Figure 3 3 is a structural diagram of a refrigerated drawer in a refrigerator provided by an embodiment of the present invention. A drawer temperature sensor 31 is provided in the refrigerated drawer 30 for detecting the drawer temperature of the refrigerated drawer. The refrigerated drawer 30 can be temperature-controlled by a separate gear, and its temperature change will affect the temperature of the refrigerated chamber. For example, when the refrigerated drawer is located at the bottom of the refrigerated chamber, the temperature of the position of the refrigerated chamber close to the refrigerated drawer is greatly affected by the temperature of the refrigerated drawer, and the refrigerated temperature sensor is generally located in the middle of the refrigerated chamber. Therefore, this temperature influence will directly affect the temperature sensing process of the refrigerated temperature sensor.

[0055] See also Figure 4 , Figure 4It is a structural diagram of the refrigeration system in a single-system refrigerator provided by an embodiment of the present invention, and the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. The compression process is: plug in the power cord of the refrigerator, and when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature, low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature, high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser 4, and the temperature continues to drop, and is gradually cooled to a saturated vapor at room temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows: The process is as follows: the saturated refrigerant liquid after condensation is filtered out of moisture and impurities by a drying filter and then flows into the capillary tube 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0056] Specifically, the controller is configured to: when it is determined that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, calculate the real-time cooling rate of the refrigerated temperature sensor within a preset time period; obtain the refrigeration parameters of the refrigerator in the current operating state, and obtain the pre-stored standard cooling rate corresponding to the refrigeration parameters; calculate the rate difference between the real-time cooling rate and the standard cooling rate; when the rate difference is greater than the preset cooling rate threshold, adjust the shutdown temperature or adjust the startup time of the compressor.

[0057] For example, see Figure 5 , Figure 5This is the first workflow diagram of the controller in the refrigerator provided by an embodiment of the present invention, wherein the controller is configured to execute steps S11 to S17. When it is determined that the temperature of the refrigerated drawer has no effect on the detection result of the refrigerated temperature sensor, the current shutdown temperature and the compressor startup time are kept unchanged; when it is determined that the temperature of the refrigerated drawer has an effect on the detection result of the refrigerated temperature sensor, this is only a preliminary determination, and further subsequent determinations are required to determine whether the temperature of the refrigerated drawer has actually affected the temperature of the refrigerated compartment. At this time, the real-time cooling rate of the refrigerated temperature sensor within a preset time period (e.g., 10 minutes) is calculated, and then the corresponding refrigeration parameters of the refrigerator in the current operating state are obtained, and the corresponding standard cooling rate is searched in the database based on this refrigeration parameter. In the embodiment of the present invention, the standard cooling rate corresponding to the refrigerator under different refrigeration parameters is pre-recorded, so as to be compared with the real-time cooling rate, and the rate difference between the real-time cooling rate and the standard cooling rate is calculated, and an error is allowed. When the absolute value of the rate difference is less than or equal to the cooling rate threshold, it means that it is within the allowable error range, and the current shutdown temperature and the compressor startup time are kept unchanged. When the absolute value of the rate difference is greater than the preset cooling rate threshold, it means that the real-time cooling rate and the standard cooling rate are far apart, and the temperature of the refrigerated drawer does affect the temperature detection of the refrigerated temperature sensor, affecting the cooling rate of the temperature sensor. The temperature detected by the temperature sensor may be significantly different from the temperature of the refrigerated room, resulting in inaccurate shutdown temperature of the compressor. Therefore, it is necessary to adjust the shutdown temperature of the compressor or adjust the startup time of the compressor.

[0058] Specifically, the refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer. The standard cooling rate of the refrigerator in a preset time period (for example, 10 minutes) when the refrigerator is in different refrigeration chamber gear positions and refrigeration drawer gear positions is measured in advance and then stored in the database.

[0059] Furthermore, the refrigeration parameters also include the load increase and the cumulative door opening time of the refrigerating chamber within a preset time. If the user adds food into the refrigerating chamber during the calculation of the real-time cooling rate, the temperature will also rise, causing the cooling rate to slow down. Therefore, it is necessary to eliminate the temperature rise effect caused by this load increase. The standard cooling rate measured at the same level in the laboratory also adjusts its parameters according to different load increases. For example, as the load increase increases, the standard cooling rate gradually decreases. Similarly, if the user opens the door of the refrigerating chamber during the calculation of the real-time cooling rate, external high-temperature gas will flow into the refrigerating chamber, which will also cause the temperature of the refrigerating chamber to rise, causing the cooling rate to slow down. Therefore, it is necessary to eliminate the temperature rise effect caused by the door opening time. The standard cooling rate measured at the same level in the laboratory also adjusts its parameters according to different door opening times. For example, as the door opening time increases, the standard cooling rate gradually decreases.

[0060] Specifically, the controller is configured to respectively obtain the first refrigerated temperature and the second refrigerated temperature detected by the refrigerated temperature sensor at preset time intervals, and calculate the real-time cooling rate of the refrigerated temperature sensor based on the preset time period, the first refrigerated temperature and the second refrigerated temperature.

[0061] For example, see Figure 6 , Figure 6 This is a second working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention, wherein step S12 specifically includes steps S121 to S122.

[0062] Specifically, the controller is also configured to: obtain the refrigeration temperature and the drawer temperature; when the temperature difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, determine that the temperature of the refrigeration drawer has an impact on the detection result of the refrigeration temperature sensor; when the temperature difference between the drawer temperature and the refrigeration temperature is less than or equal to the temperature difference threshold, determine that the temperature of the refrigeration drawer has no impact on the detection result of the refrigeration temperature sensor.

[0063] For example, see Figure 7 , Figure 7This is a third workflow diagram of a controller in a refrigerator provided by an embodiment of the present invention. Before executing step S11, the controller is further configured to execute steps S101 to S105. The temperature difference between the refrigerating chamber temperature and the drawer temperature is calculated to obtain the temperature difference between the refrigerating chamber temperature and the drawer temperature. When the absolute value of the temperature difference is greater than the temperature difference threshold, it indicates that the temperature of the refrigerating drawer differs significantly from the temperature of the refrigerating chamber. In this case, there is a risk that the temperature of the refrigerating drawer affects the detection result of the refrigerating temperature sensor. Conversely, when the temperature difference is less than or equal to the temperature difference threshold, it indicates that the temperature of the refrigerating drawer differs slightly from the temperature of the refrigerating chamber. In this case, there is no risk that the temperature of the refrigerating drawer affects the detection result of the refrigerating temperature sensor.

[0064] Specifically, the controller is also configured to: when the difference between the drawer temperature and the refrigerated temperature is greater than a preset temperature difference threshold, and the drawer temperature is lower than the refrigerated temperature, determine that the temperature of the refrigerated drawer has a low temperature effect on the detection result of the refrigerated temperature sensor; when the difference between the drawer temperature and the refrigerated temperature is greater than a preset temperature difference threshold, and the drawer temperature is higher than the refrigerated temperature, determine that the temperature of the refrigerated drawer has a high temperature effect on the detection result of the refrigerated temperature sensor.

[0065] For example, see Figure 8 , Figure 8 This is the fourth workflow diagram of the controller in the refrigerator provided by an embodiment of the present invention, wherein step S104 specifically includes steps S1041 to S1043. When the temperature difference is greater than the temperature difference threshold, the relationship between the drawer temperature and the refrigeration temperature is further determined. If the drawer temperature is less than the refrigeration temperature, indicating that the temperature of the refrigeration drawer is much lower than the temperature of the refrigeration chamber, then it is determined that the temperature of the refrigeration drawer has a risk of low temperature affecting the detection result of the refrigeration temperature sensor; if the drawer temperature is greater than the refrigeration temperature, indicating that the temperature of the refrigeration drawer is much higher than the temperature of the refrigeration chamber, then it is determined that the temperature of the refrigeration drawer has a risk of high temperature affecting the detection result of the refrigeration temperature sensor.

[0066] Specifically, the controller is also configured to: after determining that the temperature of the refrigerated drawer has a low-temperature effect on the detection result of the refrigerated temperature sensor, when the rate difference is greater than the preset cooling rate threshold, lower the shutdown temperature or extend the startup time of the compressor; after determining that the temperature of the refrigerated drawer has a high-temperature effect on the detection result of the refrigerated temperature sensor, when the rate difference is greater than the preset cooling rate threshold, increase the shutdown temperature or shorten the startup time of the compressor.

[0067] For example, see Figure 9 , Figure 9This is the fifth workflow diagram of the controller in the refrigerator provided by an embodiment of the present invention, wherein step S16 specifically includes steps S161 to S163. If the refrigerator is affected by low temperature, the cooling rate of the refrigeration temperature sensor becomes faster. The refrigeration temperature sensor will detect that the temperature of the refrigeration compartment has quickly reached the shutdown temperature, but has not actually reached it yet, and the actual refrigeration temperature is greater than the shutdown temperature. However, due to the detection function of the temperature sensor, the compressor shuts down early, resulting in a shorter cooling time for the refrigeration compartment, which will cause the refrigeration temperature to rise. Therefore, the temperature control point needs to be automatically adjusted downward at this time, that is, lowering the shutdown temperature will prolong the compressor startup time, increase the cooling time of the refrigeration compartment, or directly extend the compressor startup time. If affected by high temperature, the cooling rate of the refrigeration temperature sensor slows down. The refrigeration temperature sensor will detect that the temperature of the refrigeration chamber reaches the shutdown temperature slowly, but it has actually reached it, and the actual refrigeration temperature is already lower than the shutdown temperature. However, due to the detection of the temperature sensor, the compressor stops slowly, and the cooling time of the refrigeration chamber becomes longer, which will cause the refrigeration temperature to be too low. Therefore, the temperature control point needs to be adjusted upward at this time, that is, the shutdown temperature is increased to shorten the startup time of the compressor and the cooling time of the refrigeration chamber, or the startup time of the compressor is directly shortened.

[0068] Compared with the prior art, the refrigerator disclosed in the embodiment of the present invention, when determining that the temperature of the refrigeration drawer affects the detection result of the refrigeration temperature sensor, calculates the real-time cooling rate of the refrigeration temperature sensor within a preset time period, and then compares this real-time cooling rate with the preset standard cooling rate, and then adjusts the shutdown temperature or adjusts the startup time of the compressor, so that the temperature control of the refrigeration compartment is more reasonable, avoiding the phenomenon that the temperature of the refrigeration drawer is too high or too low and affects the refrigeration temperature sensor, which leads to inaccurate temperature control of the refrigeration compartment, and can avoid the deviation of the refrigeration temperature and accurately control the temperature of the refrigeration compartment.

[0069] See also Figure 10 , Figure 10 This is a flow chart of a refrigerator control method provided by an embodiment of the present invention. The refrigerator control method is implemented by a controller in the refrigerator. The refrigerator is provided with a refrigeration compartment and a freezer compartment, the refrigeration compartment is provided with a refrigeration drawer, and the refrigeration compartment is provided with a refrigeration temperature sensor for detecting the refrigeration temperature. The controller is configured to:

[0070] S1. When it is determined that the temperature of the refrigerated drawer affects the detection result of the refrigerated temperature sensor, calculating the real-time cooling rate of the refrigerated temperature sensor within a preset time period;

[0071] S2. Obtaining refrigeration parameters of the refrigerator in the current operating state, and obtaining a pre-stored standard cooling rate corresponding to the refrigeration parameters;

[0072] S3. Calculate the rate difference between the real-time cooling rate and the standard cooling rate, and when the rate difference is greater than a preset cooling rate threshold, adjust the shutdown temperature or adjust the startup time of the compressor.

[0073] For example, if it is determined that the temperature of the refrigerated drawer has no effect on the detection result of the refrigerated temperature sensor, the current shutdown temperature and the compressor on-time are maintained unchanged. If it is determined that the temperature of the refrigerated drawer has an effect on the detection result of the refrigerated temperature sensor, this is only a preliminary determination, and further determination is required to determine whether the temperature of the refrigerated drawer has actually affected the temperature of the refrigerated compartment. In this case, the real-time cooling rate of the refrigerated temperature sensor within a preset time period (e.g., 10 minutes) is calculated, and then the refrigeration parameters corresponding to the current operating state of the refrigerator are obtained. Based on these refrigeration parameters, the corresponding standard cooling rate is searched in the database. In this embodiment of the present invention, the standard cooling rate corresponding to the refrigerator under different refrigeration parameters is pre-recorded, and then compared with the real-time cooling rate, and the rate difference between the real-time cooling rate and the standard cooling rate is calculated, with an allowable error. When the absolute value of the rate difference is less than or equal to the cooling rate threshold, it indicates that it is within the allowable error range, and the current shutdown temperature and the compressor on-time are maintained unchanged. When the absolute value of the rate difference is greater than the preset cooling rate threshold, it means that the real-time cooling rate and the standard cooling rate are far apart at this time, and the temperature of the refrigerated drawer does affect the temperature detection of the refrigerated temperature sensor, affecting the cooling rate of the temperature sensor. The temperature detected by the temperature sensor may be quite different from the temperature of the refrigerated chamber, resulting in inaccurate shutdown temperature of the compressor. Therefore, it is necessary to adjust the shutdown temperature of the compressor or adjust the startup time of the compressor.

[0074] Specifically, the refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer. The standard cooling rate of the refrigerator in a preset time period (for example, 10 minutes) when the refrigerator is in different refrigeration chamber gear positions and refrigeration drawer gear positions is measured in advance and then stored in the database.

[0075] Furthermore, the refrigeration parameters also include the load increase and the cumulative door opening time of the refrigerating chamber within a preset time. If the user adds food into the refrigerating chamber during the calculation of the real-time cooling rate, the temperature will also rise, causing the cooling rate to slow down. Therefore, it is necessary to eliminate the temperature rise effect caused by this load increase. The standard cooling rate measured at the same level in the laboratory also adjusts its parameters according to different load increases. For example, as the load increase increases, the standard cooling rate gradually decreases. Similarly, if the user opens the door of the refrigerating chamber during the calculation of the real-time cooling rate, external high-temperature gas will flow into the refrigerating chamber, which will also cause the temperature of the refrigerating chamber to rise, causing the cooling rate to slow down. Therefore, it is necessary to eliminate the temperature rise effect caused by the door opening time. The standard cooling rate measured at the same level in the laboratory also adjusts its parameters according to different door opening times. For example, as the door opening time increases, the standard cooling rate gradually decreases.

[0076] Specifically, the calculation of the real-time cooling rate of the refrigerated temperature sensor within a preset time period includes: respectively obtaining the first refrigerated temperature and the second refrigerated temperature detected by the refrigerated temperature sensor at a preset time interval, and calculating the real-time cooling rate of the refrigerated temperature sensor based on the preset time period, the first refrigerated temperature and the second refrigerated temperature.

[0077] Specifically, before determining that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, the method also includes: obtaining the refrigerated temperature and the drawer temperature; when the temperature difference between the drawer temperature and the refrigerated temperature is greater than a preset temperature difference threshold, determining that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor; when the temperature difference between the drawer temperature and the refrigerated temperature is less than or equal to the temperature difference threshold, determining that the temperature of the refrigerated drawer has no impact on the detection result of the refrigerated temperature sensor.

[0078] Exemplarily, the temperature difference between the refrigeration chamber temperature and the drawer temperature is calculated. When the temperature difference is greater than the temperature difference threshold, it indicates that the temperature of the refrigeration drawer is significantly different from the temperature of the refrigeration chamber. At this time, there is a risk that the temperature of the refrigeration drawer affects the detection result of the refrigeration temperature sensor. Conversely, when the temperature difference is less than or equal to the temperature difference threshold, it indicates that the temperature of the refrigeration drawer is not much different from the temperature of the refrigeration chamber. At this time, there is no risk that the temperature of the refrigeration drawer affects the detection result of the refrigeration temperature sensor.

[0079] Specifically, the determining whether the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor includes: when the drawer temperature is lower than the refrigerated temperature, determining that the temperature of the refrigerated drawer has a low-temperature impact on the detection result of the refrigerated temperature sensor; when the drawer temperature is higher than the refrigerated temperature, determining that the temperature of the refrigerated drawer has a high-temperature impact on the detection result of the refrigerated temperature sensor.

[0080] Exemplarily, when the temperature difference is greater than the temperature difference threshold, the relationship between the drawer temperature and the refrigeration temperature is further judged. If the drawer temperature is lower than the refrigeration temperature, it means that the temperature of the refrigeration drawer is much lower than the temperature of the refrigeration chamber, then it is determined that the temperature of the refrigeration drawer has a risk of low temperature affecting the detection result of the refrigeration temperature sensor; if the drawer temperature is greater than the refrigeration temperature, it means that the temperature of the refrigeration drawer is much higher than the temperature of the refrigeration chamber, then it is determined that the temperature of the refrigeration drawer has a risk of high temperature affecting the detection result of the refrigeration temperature sensor.

[0081] Specifically, the adjusting of the shutdown temperature or the adjusting of the startup time of the compressor includes: after determining that the temperature of the refrigerated drawer has a low temperature effect on the detection result of the refrigerated temperature sensor, lowering the shutdown temperature or extending the startup time of the compressor; after determining that the temperature of the refrigerated drawer has a high temperature effect on the detection result of the refrigerated temperature sensor, increasing the shutdown temperature or shortening the startup time of the compressor.

[0082] For example, if affected by low temperature, the cooling rate of the refrigeration temperature sensor becomes faster. The refrigeration temperature sensor will detect that the temperature of the refrigeration chamber reaches the shutdown temperature quickly, but it has not actually reached it, and the actual refrigeration temperature is still greater than the shutdown temperature. However, due to the detection function of the temperature sensor, the cooling time of the refrigeration chamber becomes shorter, which will cause the refrigeration temperature to rise. Therefore, the temperature control point needs to be lowered by itself at this time, that is, lowering the shutdown temperature will lengthen the startup time of the compressor, increase the cooling time of the refrigeration chamber, or directly extend the startup time of the compressor. If affected by high temperature, the cooling rate of the refrigeration temperature sensor slows down. The refrigeration temperature sensor will detect that the temperature of the refrigeration chamber reaches the shutdown temperature slowly, but it has actually reached it, and the actual refrigeration temperature is already lower than the shutdown temperature. However, due to the detection function of the temperature sensor, the cooling time of the refrigeration chamber becomes longer, which will cause the refrigeration temperature to be too low. Therefore, the temperature control point needs to be adjusted upward at this time, that is, the shutdown temperature is increased to shorten the startup time of the compressor and shorten the cooling time of the refrigeration chamber, or the startup time of the compressor is directly shortened.

[0083] Compared with the prior art, the refrigerator control method disclosed in the embodiment of the present invention, when determining that the temperature of the refrigerated drawer affects the detection result of the refrigerated temperature sensor, calculates the real-time cooling rate of the refrigerated temperature sensor within a preset time period, and then compares this real-time cooling rate with the preset standard cooling rate, and then adjusts the shutdown temperature or adjusts the startup time of the compressor, so that the temperature control of the refrigerated compartment is more reasonable, avoiding the phenomenon that the temperature of the refrigerated drawer is too high or too low and affects the refrigerated temperature sensor, which leads to inaccurate temperature control of the refrigerated compartment, and can avoid the deviation of the refrigerated temperature and accurately control the temperature of the refrigerated compartment.

[0084] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, wherein a storage compartment is formed in the box body, the storage compartment includes at least a refrigeration compartment and a freezer compartment, and a refrigeration drawer is provided in the refrigeration compartment; A door, used for opening and closing the storage chamber; A compressor is provided in the compressor compartment of the box body, and is used to compress the refrigerant flowing through the refrigeration cycle of the refrigerator to provide power for the refrigeration cycle. The compressor operates according to preset start-up temperature and shutdown temperature; a refrigeration temperature sensor, disposed in the refrigeration chamber, for detecting the refrigeration temperature of the refrigeration chamber; a drawer temperature sensor, disposed in the refrigerated drawer, for detecting the drawer temperature of the refrigerated drawer; The controller is configured as: Acquiring the refrigeration temperature and the drawer temperature; When the temperature difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, it is determined that the temperature of the refrigeration drawer has an impact on the detection result of the refrigeration temperature sensor; When the temperature difference between the drawer temperature and the refrigeration temperature is less than or equal to the temperature difference threshold, determining that the temperature of the refrigeration drawer has no effect on the detection result of the refrigeration temperature sensor; When it is determined that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, calculating the real-time cooling rate of the refrigerated temperature sensor within a preset time period; Obtaining refrigeration parameters of the refrigerator in the current operating state, and obtaining a pre-stored standard cooling rate corresponding to the refrigeration parameters; Calculating the rate difference between the real-time cooling rate and the standard cooling rate; When the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is adjusted or the startup time of the compressor is adjusted.

2. The refrigerator according to claim 1, wherein The controller is further configured to: A first refrigerated temperature and a second refrigerated temperature detected by the refrigerated temperature sensor at preset time intervals are respectively obtained, and a real-time cooling rate of the refrigerated temperature sensor is calculated according to the preset time period, the first refrigerated temperature and the second refrigerated temperature.

3. The refrigerator according to claim 1, wherein The controller is further configured to: When the difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, and the drawer temperature is lower than the refrigeration temperature, it is determined that the temperature of the refrigeration drawer has a low-temperature effect on the detection result of the refrigeration temperature sensor; When the difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, and the drawer temperature is greater than the refrigeration temperature, it is determined that the temperature of the refrigeration drawer has a high temperature effect on the detection result of the refrigeration temperature sensor.

4. The refrigerator according to claim 3, wherein The controller is further configured to: After determining that the temperature of the refrigerated drawer has a low-temperature effect on the detection result of the refrigerated temperature sensor, when the rate difference is greater than a preset cooling rate threshold, lowering the shutdown temperature or extending the startup time of the compressor; After determining that the temperature of the refrigerated drawer has a high temperature impact on the detection result of the refrigerated temperature sensor, when the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is increased or the startup time of the compressor is shortened.

5. The refrigerator according to claim 1, wherein The refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer.

6. The refrigerator according to claim 5, wherein The refrigeration parameters also include the load increase and the cumulative door opening time of the refrigeration chamber within a preset time.

7. A refrigerator control method, characterized in that: The refrigerator is provided with a refrigerating chamber and a freezing chamber, the refrigerating chamber is provided with a refrigerating drawer, and the refrigerating chamber is provided with a refrigerating temperature sensor for detecting the refrigerating temperature; then, the controller is configured to: Get refrigerator temperature and drawer temperature; When the temperature difference between the drawer temperature and the refrigeration temperature is greater than a preset temperature difference threshold, it is determined that the temperature of the refrigeration drawer has an impact on the detection result of the refrigeration temperature sensor; When the temperature difference between the drawer temperature and the refrigeration temperature is less than or equal to the temperature difference threshold, determining that the temperature of the refrigeration drawer has no effect on the detection result of the refrigeration temperature sensor; When it is determined that the temperature of the refrigerated drawer has an impact on the detection result of the refrigerated temperature sensor, calculating the real-time cooling rate of the refrigerated temperature sensor within a preset time period; Obtaining refrigeration parameters of the refrigerator in the current operating state, and obtaining a pre-stored standard cooling rate corresponding to the refrigeration parameters; The rate difference between the real-time cooling rate and the standard cooling rate is calculated, and when the rate difference is greater than a preset cooling rate threshold, the shutdown temperature is adjusted or the startup time of the compressor is adjusted.

8. The refrigerator control method according to claim 7, wherein: The calculating the real-time cooling rate of the refrigeration temperature sensor within a preset time period includes: A first refrigerated temperature and a second refrigerated temperature detected by the refrigerated temperature sensor after a preset time interval are respectively obtained, and a real-time cooling rate of the refrigerated temperature sensor is calculated according to the preset time period, the first refrigerated temperature and the second refrigerated temperature.

9. The refrigerator control method according to claim 7, wherein: The refrigeration parameters include the gear position of the refrigeration chamber and the gear position of the refrigeration drawer.

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