Refrigerator and freezing air door control method thereof

Abstract

The present invention discloses a refrigerator and a method for controlling a freezing damper thereof. A freezing air outlet and a variable temperature air supply outlet are provided on the freezing air duct of the refrigerator. The freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber. A freezing damper is provided at the freezing air outlet to control the air volume of the freezing air outlet. When the variable temperature chamber requires more cooling capacity than the freezing chamber, the amount of cold air in the freezing chamber is reduced by adjusting the opening angle of the freezing damper. Since the freezing chamber and the variable temperature chamber share a freezing air duct, the amount of cold air in the variable temperature chamber increases while the amount of cold air in the freezing chamber is reduced, thereby achieving an effect in which the temperature of the variable temperature chamber is lower than that of the freezing chamber. In addition, when adjusting the freezing damper, the temperature difference between the variable temperature chamber and the volume of the freezing chamber and the variable temperature chamber are taken into account, making the adjustment of the freezing damper more reasonable, thereby allowing the freezing chamber and the variable temperature chamber to reach the set temperature synchronously.

Description

Technical Field

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

[0002] For cross-type refrigerators, the volumes of the freezer and variable temperature chambers are roughly the same. The temperature control range of the freezer is -25°C to -15°C, and the temperature control range of the variable temperature chamber is -20°C to 5°C. Taking into account the refrigeration efficiency, the designed air volume of the freezer and variable temperature chambers is roughly the same, and the temperature drop rate of the two is also roughly the same. Although it can meet the refrigeration needs of the freezer and variable temperature chambers, when the user has special needs for the variable temperature chamber, such as a significant increase in the set temperature of the freezer, or a significant decrease in the set temperature of the variable temperature chamber, the variable temperature chamber requires more cooling capacity than the freezer. However, when the variable temperature chamber is cooled, the freezer is also cooled synchronously, resulting in the actual temperature of the freezer being lower than its set temperature. Summary of the Invention

[0003] The purpose of the embodiment of the present invention is to provide a refrigerator and a freezing air door control method thereof, in which the air outlet area of ​​the top air outlet of the freezing air duct can be controlled by a program, and the air outlet volume of the freezing chamber is set according to the temperature parameters of the freezing chamber and the variable temperature chamber, so that the freezing chamber and the variable temperature chamber reach the set temperature synchronously.

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

[0005] a box body, wherein a storage chamber is formed in the box body, and the storage chamber includes at least a temperature-changing chamber and a freezing chamber;

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

[0007] A freezing air duct is provided in the box body, comprising a freezing air outlet and a temperature-variable air supply outlet, wherein the freezing air outlet is used to provide cold air to the freezing chamber, and the temperature-variable air supply outlet is used to provide cold air to the temperature-variable chamber;

[0008] A freezing damper, provided at the freezing air outlet, for controlling the air volume of the freezing air outlet;

[0009] A first temperature sensor is provided in the freezing chamber and is used to detect the real-time freezing temperature of the freezing chamber;

[0010] A second temperature sensor is provided in the temperature-changing chamber and is used to detect the real-time temperature of the temperature-changing chamber;

[0011] The controller is configured as:

[0012] Obtaining the real-time freezing temperature and the real-time variable temperature, as well as the preset freezing set temperature and the variable temperature set temperature;

[0013] Calculate the freezing temperature difference between the real-time freezing temperature and the freezing set temperature, and calculate the variable temperature difference between the real-time variable temperature and the variable temperature set temperature;

[0014] When it is determined that the opening of the freezing damper needs to be adjusted, a temperature difference characterization value is calculated according to the freezing temperature difference, the variable temperature difference and a preset volume coefficient;

[0015] A corresponding damper adjustment value is obtained according to the temperature difference characterization value, and the opening of the freezing damper is adjusted according to the damper adjustment value.

[0016] As an improvement to the above solution, the controller is further configured to:

[0017] The volume of the temperature-changing chamber and the volume of the freezing chamber are obtained, and a ratio of the volume of the temperature-changing chamber to the volume of the freezing chamber is calculated as the volume coefficient.

[0018] As an improvement to the above solution, the temperature difference characterization value is calculated based on the freezing temperature difference, the variable temperature difference and a preset volume coefficient, including:

[0019] The product of the variable temperature difference and the volume coefficient is calculated, and the difference between the product and the freezing temperature difference is calculated as the temperature difference characterization value.

[0020] As an improvement to the above solution, the controller is further configured to:

[0021] When it is detected that the gear information of the freezer compartment and the variable temperature chamber meets the preset damper adjustment conditions, it is determined that the opening of the freezer damper needs to be adjusted; wherein, the damper adjustment condition is: the temperature corresponding to the gear information of the variable temperature chamber is lower than the temperature corresponding to the gear information of the freezer compartment.

[0022] As an improvement to the above solution, the refrigerator further includes:

[0023] A driving device, the driving device comprising a stepping motor and a driving gear, the stepping motor being fixed to the front cover plate or the rear cover plate of the freezing air duct, the driving gear being fixed to the rotating shaft of the stepping motor, the driving gear being engaged with the gear at one end of the freezing air door, the stepping motor driving the freezing air door to rotate via the driving gear to adjust the air volume of the freezing air outlet;

[0024] The controller is further configured to:

[0025] The number of steps of the stepping motor is adjusted according to the damper adjustment value to adjust the opening of the freezing damper.

[0026] As an improvement to the above solution, the step of obtaining the corresponding damper adjustment value according to the temperature difference characterization value includes:

[0027] According to the temperature difference characterization value, the corresponding damper adjustment value is searched from the preset damper adjustment strategy table; the damper adjustment strategy table records several groups of different temperature difference characterization values ​​and their corresponding damper adjustment values, wherein the temperature difference characterization value is directly proportional to the damper adjustment value.

[0028] To achieve the above-mentioned object, an embodiment of the present invention further provides a refrigerator freezing damper control method, wherein a freezing air duct is provided in the refrigerator body, and a freezing air outlet and a variable temperature air supply outlet are provided on the freezing air duct, wherein the freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber; a freezing damper is provided at the freezing air outlet, for controlling the air volume of the freezing air outlet; the method comprises:

[0029] Obtaining the real-time freezing temperature and the real-time variable temperature, as well as the preset freezing set temperature and the variable temperature set temperature;

[0030] Calculate the freezing temperature difference between the real-time freezing temperature and the freezing set temperature, and calculate the variable temperature difference between the real-time variable temperature and the variable temperature set temperature;

[0031] When it is determined that the opening of the freezing damper needs to be adjusted, a temperature difference characterization value is calculated according to the freezing temperature difference, the variable temperature difference and a preset volume coefficient;

[0032] A corresponding damper adjustment value is obtained according to the temperature difference characterization value, and the opening of the freezing damper is adjusted according to the damper adjustment value.

[0033] As an improvement to the above solution, the method further includes:

[0034] The volume of the temperature-changing chamber and the volume of the freezing chamber are obtained, and a ratio of the volume of the temperature-changing chamber to the volume of the freezing chamber is calculated as the volume coefficient.

[0035] As an improvement to the above solution, the temperature difference characterization value is calculated based on the freezing temperature difference, the variable temperature difference and a preset volume coefficient, including:

[0036] The product of the variable temperature difference and the volume coefficient is calculated, and the difference between the product and the freezing temperature difference is calculated as the temperature difference characterization value.

[0037] As an improvement to the above solution, the method further includes:

[0038] When it is detected that the gear information of the freezer compartment and the variable temperature chamber meets the preset damper adjustment conditions, it is determined that the opening of the freezer damper needs to be adjusted; wherein, the damper adjustment condition is: the temperature corresponding to the gear information of the variable temperature chamber is lower than the temperature corresponding to the gear information of the freezer compartment.

[0039] Compared to the prior art, the present invention discloses a refrigerator and a method for controlling a freezing damper thereof. A freezing air outlet and a variable temperature air supply outlet are provided on the freezing air duct of the refrigerator. The freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber. A freezing damper is provided at the freezing air outlet to control the air volume of the freezing air outlet. When the variable temperature chamber requires more cooling capacity than the freezing chamber, the amount of cold air in the freezing chamber is reduced by adjusting the opening angle of the freezing damper. Since the freezing chamber and the variable temperature chamber share a freezing air duct, the amount of cold air in the variable temperature chamber increases while the amount of cold air in the freezing chamber is reduced, thereby achieving the effect of the variable temperature chamber having a lower temperature than the freezing chamber. In addition, when adjusting the freezing damper, the temperature difference between the variable temperature chamber and the volume of the freezing chamber and the variable temperature chamber are taken into account, making the adjustment of the freezing damper more reasonable, so that the freezing chamber and the variable temperature chamber reach the set temperature synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0041] Figure 2 is another schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0042] Figure 3 Schematic diagram of the refrigerant flow in the refrigeration system of the refrigerator provided by an embodiment of the present invention;

[0043] Figure 4 is a schematic diagram of a refrigeration air duct provided by an embodiment of the present invention;

[0044] Figure 5 is another schematic diagram of the refrigeration air duct provided by an embodiment of the present invention;

[0045] Figure 6 This is a partial enlarged view of the refrigeration air duct provided by an embodiment of the present invention;

[0046] Figure 7 Schematic diagram of driving a stepping motor and a refrigeration damper provided by an embodiment of the present invention;

[0047] Figure 8 Schematic diagram of a stepping motor provided by an embodiment of the present invention controlling the rotation of a gear according to the number of driving steps;

[0048] Figure 9 This is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0049] Figure 10 is a second working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0050] Figure 11is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0051] Figure 12 The present invention provides a flowchart of a refrigerator freezer damper control method.

[0052] Among them, 100, refrigerator; 10, freezer compartment; 20, variable temperature chamber; 12, first temperature sensor; 1, compressor; 2, evaporator; 3, capillary tube; 4, condenser; 30, freezing air duct; 31, freezing air outlet; 32, variable temperature air supply outlet; 33, freezing fan; 34, stepping motor; 35, drive gear; 311, freezing damper; 312, damper gear. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] See also Figures 1-2, Figures 1-2 It is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment is a cross-shaped refrigerator with an approximately rectangular shape. Its freezer compartment and temperature-changing chamber are arranged at the lower part of the refrigerator. The lower left compartment is the freezer compartment 10, and the lower right compartment is the temperature-changing chamber 20. The refrigerator includes a box body that defines a storage space and a plurality of door bodies provided 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 inner liner located on the inside of the box body, an upper end cover, a lower end cover, and an insulating layer located between the door body shell, the door inner liner, the upper end cover, and the lower end cover; usually, the insulating layer is filled with foam material. 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 multiple storage chambers. The storage chambers can be configured as temperature-changing chambers, freezer compartments, and may also include refrigeration chambers, vacuum drawers, moisturizing drawers, etc. according to different uses. Each storage chamber corresponds to one or more door bodies. For example, in Figure 1 The storage compartments at the upper and lower parts are provided with double-door bodies. The door bodies can be pivotally arranged at the opening of the box body and can also be opened in a drawer-like manner to realize drawer-like storage.

[0058] See also Figure 3 , Figure 3 This is a schematic diagram of the refrigerant flow in the refrigeration system of the refrigerator provided by an embodiment of the present invention, wherein 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 as follows: when the power cord of the refrigerator is plugged in and the contacts of the thermostat are connected, the compressor 1 starts working, and the low-temperature, low-pressure refrigerant is sucked into the compressor 1, 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 as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser 4, 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 ... 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.

[0059] See also Figure 4 , Figure 4 The figure is a schematic diagram of a refrigeration air duct provided by an embodiment of the present invention. The refrigeration air duct 30 is disposed within the housing and includes a refrigeration air outlet 31 and a variable temperature air supply vent 32. The refrigeration air outlet 31 is used to supply cold air to the freezer compartment 10, while the variable temperature air supply vent 32 is used to supply cold air to the variable temperature chamber 20. The refrigeration air outlet 31 is provided with a refrigeration damper that controls the air volume discharged from the refrigeration air outlet. The refrigeration air outlet 31 and the variable temperature air supply vent 32 share the refrigeration air duct 30, so that cold air is divided into two paths: one path flows into the freezer compartment 10 through the refrigeration air outlet 31, and the other path flows into the variable temperature chamber 20 through the variable temperature air supply vent 32. A first temperature sensor 12 is provided on the front cover of the refrigeration air duct 30. The first temperature sensor 12 is located in the freezer compartment 10 and is used to detect the real-time freezing temperature of the freezer compartment 10. Specifically, the variable temperature chamber 20 is provided with a second temperature sensor (not shown) for detecting the real-time variable temperature of the variable temperature chamber 20.

[0060] See also Figure 5 , Figure 5 It is another schematic diagram of the freezing air duct provided by an embodiment of the present invention. A freezing fan 33 is provided on the rear cover plate of the freezing air duct 30. Under the action of the freezing fan 33, the cold air after the heat exchange of the evaporator is divided into two paths, one path is introduced into the freezing chamber 10 through the freezing air outlet 31, and the other path is introduced into the variable temperature chamber 20 through the variable temperature air supply port 32. It can be understood that since the lowest temperature of the temperature control range of the freezing chamber 10 is lower than the lowest temperature of the temperature control range of the variable temperature chamber 20 (the temperature control range of the freezing chamber is -25°C to -15°C, and the temperature control range of the variable temperature chamber is -20°C to 5°C), the air outlet area of ​​the freezing air outlet 31 can be set to be greater than or equal to the air outlet area of ​​the variable temperature air supply port 32, so that more cold air will preferentially enter the freezing chamber 10. In addition, since the cold air output from the variable temperature air supply port 32 has to pass through the air duct of the variable temperature chamber 20 and then flow into the variable temperature chamber 20, the amount of cold air flowing into the variable temperature chamber 20 will not be too much when the damper of the freezing air outlet 31 is fully opened.

[0061] See also Figure 6 , Figure 6This is a partial enlarged view of the refrigeration air duct 30 provided in an embodiment of the present invention. The refrigeration air outlet 31 and the temperature-variable air supply outlet are arranged on the upper structure of the refrigeration air duct 30. The refrigeration air duct 30 is also provided with a driving device, which includes a stepping motor 34 and a driving gear 35. The stepping motor 34 is fixed to the front cover or the rear cover of the refrigeration air duct 30. The driving gear 35 is fixed to the rotating shaft of the stepping motor 34. The driving gear 35 is engaged with the damper gear at one end of the refrigeration damper 311. The stepping motor 34 drives the refrigeration damper 311 to rotate through the driving gear 35 to adjust the air output of the refrigeration air outlet 31. Figure 7 , Figure 7 3 is a driving diagram of the stepping motor 34 and the freezing damper 311 provided in an embodiment of the present invention, wherein the driving gear 35 is engaged with the damper gear 312 at one end of the freezing damper 311 .

[0062] See also Figure 8 , Figure 8 3 is a schematic diagram of a stepping motor provided in an embodiment of the present invention controlling the rotation of a gear according to the number of driving steps, where A represents the opening angle of the freezing air door 311 .

[0063] Specifically, the controller in the refrigerator is configured to: obtain the real-time freezing temperature and the real-time variable temperature, and obtain the preset freezing set temperature and the variable temperature set temperature; calculate the freezing temperature difference between the real-time freezing temperature and the freezing set temperature, and calculate the variable temperature difference between the real-time variable temperature and the variable temperature set temperature; when it is determined that the opening of the freezing damper needs to be adjusted, calculate the temperature difference characterization value based on the freezing temperature difference, the variable temperature difference and the preset volume coefficient; obtain the corresponding damper adjustment value based on the temperature difference characterization value, and adjust the opening of the freezing damper according to the damper adjustment value.

[0064] For example, see Figure 9 , Figure 9 This is the first workflow diagram of the controller in the refrigerator provided by an embodiment of the present invention, and the controller is configured to execute steps S11 to S17. This control method is an intelligent algorithm. In the non-stable operation stage caused by factors such as user gear adjustment and door opening, the difference between the compartment setting and the actual temperature is used as a parameter to obtain the rotation angle of the damper baffle. After calculating the freezing temperature difference and the variable temperature temperature difference, the controller is further configured to: when it is detected that the gear information of the freezing chamber and the variable temperature chamber meets the preset damper adjustment condition, determine that the opening of the freezing damper needs to be adjusted; wherein, the damper adjustment condition is: the temperature corresponding to the gear information of the variable temperature chamber is lower than the temperature corresponding to the gear information of the freezing chamber.

[0065] For example, after the refrigerator is operating normally, the user may perform operations such as adjusting the gear and opening the door. When these two situations occur, the temperature of the freezer compartment and the temperature of the cooling room will change. The basic control principles of damper adjustment are as follows:

[0066] 1) The freezing temperature difference between the real-time freezing temperature and the freezing set temperature is less than a fixed threshold (such as 2 degrees). This state indicates that the refrigerator is running smoothly, the freezing damper does not need to be intervened, and the freezing damper angle A remains unchanged; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is greater than the freezing set temperature, it means that the freezing room temperature is too high, then the opening angle of the freezing damper needs to be increased, the freezing damper angle A increases, and the amount of cold air entering the freezing room is increased; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is less than the freezing set temperature, it means that the freezing room temperature is too low, then the opening angle of the freezing damper needs to be reduced, the freezing damper angle A decreases, and the amount of cold air entering the freezing room is reduced.

[0067] The controller is further configured to: if the freezing temperature difference is less than a fixed threshold, control the opening angle of the freezing damper to remain unchanged; if the freezing temperature difference is greater than or equal to the fixed threshold, and the freezing real-time temperature is greater than the freezing set temperature, increase the opening angle of the freezing damper; if the freezing temperature difference is greater than or equal to the fixed threshold, and the freezing real-time temperature is less than the freezing set temperature, reduce the opening angle of the freezing damper. The control logic at this time can refer to Figure 10 , Figure 10 This is a second working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention. After executing steps S11 to S12, the controller is configured to execute steps S21 to S25.

[0068] 2) If the freezing door opening time is less than a fixed time (such as 1 minute), it is considered that the door opening time is short, the hot air entering the box is small, and the impact on the temperature of the compartment is small, and the freezing damper does not need to be intervened. If the freezing door opening time is greater than or equal to 1 minute, the opening angle of the freezing damper needs to be increased, and the angle A of the freezing damper is increased to increase the amount of cold air entering the freezing compartment.

[0069] The controller is further configured to: obtain the freezing door opening time of the freezing chamber, if the freezing door opening time is less than the fixed time, control the freezing air door opening angle to remain unchanged; if the freezing door opening time is greater than or equal to the fixed time, increase the freezing air door opening angle. The control logic at this time can be referred to Figure 11 , Figure 11 This is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention. The controller is further configured to execute steps S31 to S34.

[0070] 3) When adjusting the gear of the freezing compartment or the variable temperature compartment, there will be a difference between the set gear and the actual temperature. For example, after the gear adjustment, the variable temperature gear is significantly reduced or the freezing gear is significantly increased. At this time, the cooling capacity required for the variable temperature will be greater than the stable operation state. The damper provided by the present invention needs to be used to balance the cooling speed of the two compartments. At this time, the damper adjustment conditions are met and the temperature difference characterization value needs to be calculated.

[0071] Specifically, the controller is further configured to: obtain the volume of the variable temperature chamber and the volume of the freezer compartment, and calculate the ratio of the volume of the variable temperature chamber to the volume of the freezer compartment as the volume coefficient. Calculating the temperature difference representation value based on the freezing temperature difference, the variable temperature difference, and a preset volume coefficient includes: calculating the product of the variable temperature difference and the volume coefficient, and calculating the difference between the product and the freezing temperature difference as the temperature difference representation value.

[0072] Exemplarily, the calculation of the temperature difference characterization value ΔT satisfies the following formula: ΔT=k*ΔT2-ΔT1; wherein ΔT1 is the freezing temperature difference, ΔT2 is the variable temperature difference; k is the volume coefficient, k is the ratio of the volumes of the two compartments, k=V 变温 / V 冷冻 In one embodiment of the present invention, the volumes of the freezer compartment and the temperature-changing chamber are approximately the same, so k=1. In other embodiments, k can be other values, which need to be determined based on the volumes of the freezer compartment and the temperature-changing chamber in the actual refrigerator and are not specifically limited here.

[0073] Specifically, obtaining the corresponding damper adjustment value based on the temperature difference characterization value includes: searching for the corresponding damper adjustment value from a preset damper adjustment strategy table based on the temperature difference characterization value; the damper adjustment strategy table records several groups of different temperature difference characterization values ​​and their corresponding damper adjustment values, wherein the temperature difference characterization value is directly proportional to the damper adjustment value.

[0074] For example, under the premise of a certain volume, the temperature difference is proportional to the required cooling capacity. If the cooling capacity required for variable temperature is greater than that for freezing, a damper is required for adjustment. The larger the temperature difference characterization value, the larger the damper adjustment value A. Specific values ​​of the temperature difference characterization value and the damper adjustment value can be referred to in Table 1. The damper adjustment value described in the embodiment of the present invention can be a single specific value or a range of values. For example, in Table 1, when the temperature difference characterization value ΔT = 3, the damper adjustment value A is 70-90%, expressed in %.

[0075] Table 1 Temperature difference characterization value and air door adjustment value

[0076] ΔT A ＞3 90

[0077]

[0078] Specifically, the controller is further configured to adjust the number of steps of the stepper motor 34 according to the damper adjustment value to adjust the opening of the freezing damper 311. After obtaining the A value, the controller calculates the number of steps of the stepper motor 34 and provides a signal to the stepper motor 34, thereby driving the stepper motor 34.

[0079] Compared to the prior art, the refrigerator disclosed in the present invention is provided with a freezing air outlet and a variable temperature air supply outlet on the refrigerator freezing air duct. The freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber. A freezing air damper is provided at the freezing air outlet to control the air output of the freezing air outlet. When the variable temperature chamber requires more cooling capacity than the freezing chamber, the amount of cold air in the freezing chamber is reduced by adjusting the opening angle of the freezing air damper. Since the freezing chamber and the variable temperature chamber share a freezing air duct, the amount of cold air in the variable temperature chamber increases while the amount of cold air in the freezing chamber is reduced, thereby achieving the effect of the variable temperature chamber being lower than the freezing chamber. In addition, when adjusting the freezing air damper, the temperature difference between the variable temperature chamber and the volume of the freezing chamber and the variable temperature chamber are taken into account, making the adjustment of the freezing air damper more reasonable, so that the freezing chamber and the variable temperature chamber reach the set temperature synchronously.

[0080] See also Figure 12 , Figure 12 This is a flow chart of a refrigerator freezing damper control method provided by an embodiment of the present invention. A freezing air duct is provided in the refrigerator body, and a freezing air outlet and a variable temperature air supply outlet are provided on the freezing air duct. The freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber. A freezing damper is provided at the freezing air outlet to control the air volume of the freezing air outlet. Then, the method includes:

[0081] S1. Obtaining the real-time freezing temperature and the real-time variable temperature, as well as obtaining the preset freezing set temperature and the variable temperature set temperature;

[0082] S2, calculating the freezing temperature difference between the freezing real-time temperature and the freezing set temperature, and calculating the temperature difference between the temperature changing real-time temperature and the temperature changing set temperature;

[0083] S3. When it is determined that the opening of the freezing damper needs to be adjusted, a temperature difference characterization value is calculated based on the freezing temperature difference, the variable temperature difference, and a preset volume coefficient;

[0084] S4. Obtain a corresponding damper adjustment value according to the temperature difference characterization value, and adjust the opening of the freezing damper according to the damper adjustment value.

[0085] Exemplarily, the control method employs an intelligent algorithm. During periods of non-stationary operation caused by factors such as user gear shifting and door opening, the damper damper rotation angle is determined using the difference between the set and actual compartment temperatures as a parameter. After calculating the freezing temperature difference and the variable temperature temperature difference, the method further comprises: determining that the freezing damper opening needs to be adjusted when detecting that the gear information of the freezing compartment and the variable temperature compartment meets a preset damper adjustment condition; wherein the damper adjustment condition is that the temperature corresponding to the gear information of the variable temperature compartment is lower than the temperature corresponding to the gear information of the freezing compartment.

[0086] For example, after the refrigerator is operating normally, the user may perform operations such as adjusting the gear and opening the door. When these two situations occur, the temperature of the freezer compartment and the temperature of the cooling room will change. The basic control principles of damper adjustment are as follows:

[0087] 1) The freezing temperature difference between the real-time freezing temperature and the freezing set temperature is less than a fixed threshold (such as 2 degrees). This state indicates that the refrigerator is running smoothly, the freezing damper does not need to be intervened, and the freezing damper angle A remains unchanged; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is greater than the freezing set temperature, it means that the freezing room temperature is too high, then the opening angle of the freezing damper needs to be increased, the freezing damper angle A increases, and the amount of cold air entering the freezing room is increased; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is less than the freezing set temperature, it means that the freezing room temperature is too low, then the opening angle of the freezing damper needs to be reduced, the freezing damper angle A decreases, and the amount of cold air entering the freezing room is reduced.

[0088] The method also includes: if the freezing difference is less than a fixed threshold, controlling the opening angle of the freezing damper to remain unchanged; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is greater than the freezing set temperature, increasing the opening angle of the freezing damper; if the freezing temperature difference is greater than or equal to the fixed threshold, and the real-time freezing temperature is less than the freezing set temperature, reducing the opening angle of the freezing damper.

[0089] 2) If the freezing door opening time is less than a fixed time (such as 1 minute), it is considered that the door opening time is short, the hot air entering the box is small, and the impact on the temperature of the compartment is small, and the freezing damper does not need to be intervened. If the freezing door opening time is greater than or equal to 1 minute, the opening angle of the freezing damper needs to be increased, and the angle A of the freezing damper is increased to increase the amount of cold air entering the freezing compartment.

[0090] The method further includes: obtaining the freezing door opening time of the freezer compartment, if the freezing door opening time is less than a fixed time, controlling the opening angle of the freezing damper to remain unchanged; if the freezing door opening time is greater than or equal to the fixed time, increasing the opening angle of the freezing damper.

[0091] 3) When adjusting the gear of the freezing compartment or the variable temperature compartment, there will be a difference between the set gear and the actual temperature. For example, after the gear adjustment, the variable temperature gear is significantly reduced or the freezing gear is significantly increased. At this time, the cooling capacity required for the variable temperature will be greater than the stable operation state. The damper provided by the present invention needs to be used to balance the cooling speed of the two compartments. At this time, the damper adjustment conditions are met and the temperature difference characterization value needs to be calculated.

[0092] Specifically, the method further includes: obtaining the volume of the variable temperature chamber and the volume of the freezer compartment, and calculating the ratio of the volume of the variable temperature chamber to the volume of the freezer compartment as the volume coefficient. Calculating the temperature difference characterizing value based on the freezing temperature difference, the variable temperature difference, and a preset volume coefficient includes: calculating the product of the variable temperature difference and the volume coefficient, and calculating the difference between the product and the freezing temperature difference as the temperature difference characterizing value.

[0093] Exemplarily, the calculation of the temperature difference characterization value ΔT satisfies the following formula: ΔT=k*ΔT2-ΔT1; wherein ΔT1 is the freezing temperature difference, ΔT2 is the variable temperature difference; k is the volume coefficient, k is the ratio of the volumes of the two compartments, k=V 变温 / V 冷冻 In one embodiment of the present invention, the volumes of the freezer compartment and the temperature-changing chamber are approximately the same, so k=1. In other embodiments, k can be other values, which need to be determined based on the volumes of the freezer compartment and the temperature-changing chamber in the actual refrigerator and are not specifically limited here.

[0094] Specifically, obtaining the corresponding damper adjustment value based on the temperature difference characterization value includes: searching for the corresponding damper adjustment value from a preset damper adjustment strategy table based on the temperature difference characterization value; the damper adjustment strategy table records several groups of different temperature difference characterization values ​​and their corresponding damper adjustment values, wherein the temperature difference characterization value is directly proportional to the damper adjustment value.

[0095] For example, under the premise of a certain volume, the temperature difference is proportional to the required cooling capacity. If the cooling capacity required for variable temperature is greater than that for freezing, the damper needs to be used for adjustment. The larger the temperature difference representation value, the larger the damper adjustment value A.

[0096] It is worth noting that the specific working process of the refrigerator freezer damper control method described in the embodiment of the present invention can refer to the working process of the refrigerator controller described in the above embodiment, and will not be repeated here.

[0097] Compared to the prior art, the present invention discloses a refrigerator freezer damper control method, in which a freezer outlet and a variable temperature air supply outlet are provided on the freezer air duct of the refrigerator. The freezer outlet is used to provide cold air to the freezer compartment, and the variable temperature air supply outlet is used to provide cold air to the variable temperature room. A freezer damper is provided at the freezer outlet to control the air volume of the freezer outlet. When the variable temperature room requires more cooling capacity than the freezer compartment, the amount of cold air in the freezer compartment is reduced by adjusting the opening angle of the freezer damper. Since the freezer compartment and the variable temperature room share a freezer air duct, the amount of cold air in the variable temperature room increases while the amount of cold air in the freezer compartment decreases, thereby achieving the effect of the variable temperature room being lower than the freezer compartment. In addition, when adjusting the freezer damper, the temperature difference between the variable temperature room and the volume of the freezer compartment and the variable temperature room are taken into account, making the adjustment of the freezer damper more reasonable, so that the freezer compartment and the variable temperature room reach the set temperature synchronously.

[0098] 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 chamber is formed in the box body, and the storage chamber includes at least a temperature-changing chamber and a freezing chamber; A door, used for opening and closing the storage chamber; A freezing air duct is provided in the box body, comprising a freezing air outlet and a temperature-variable air supply outlet, wherein the freezing air outlet is used to provide cold air to the freezing chamber, and the temperature-variable air supply outlet is used to provide cold air to the temperature-variable chamber; A freezing damper, provided at the freezing air outlet, for controlling the air volume of the freezing air outlet; A first temperature sensor is provided in the freezing chamber and is used to detect the real-time freezing temperature of the freezing chamber; A second temperature sensor is provided in the temperature-changing chamber and is used to detect the real-time temperature of the temperature-changing chamber; The controller is configured as: Obtaining the real-time freezing temperature and the real-time variable temperature, as well as the preset freezing set temperature and the variable temperature set temperature; Calculate the freezing temperature difference between the real-time freezing temperature and the freezing set temperature, and calculate the variable temperature difference between the real-time variable temperature and the variable temperature set temperature; Obtaining the volume of the temperature-changing chamber and the volume of the freezing chamber, and calculating a ratio of the volume of the temperature-changing chamber to the volume of the freezing chamber as a volume coefficient; When it is determined that the opening of the freezing damper needs to be adjusted, the product of the variable temperature difference and the volume coefficient is calculated, and the difference between the product and the freezing temperature difference is calculated as a temperature difference characterization value; A corresponding damper adjustment value is obtained according to the temperature difference characterization value, and the opening of the freezing damper is adjusted according to the damper adjustment value.

2. The refrigerator according to claim 1, wherein The controller is further configured to: When it is detected that the gear information of the freezer compartment and the variable temperature chamber meets the preset damper adjustment conditions, it is determined that the opening of the freezer damper needs to be adjusted; wherein, the damper adjustment condition is: the temperature corresponding to the gear information of the variable temperature chamber is lower than the temperature corresponding to the gear information of the freezer compartment.

3. The refrigerator according to claim 1, wherein The refrigerator further comprises: A driving device, the driving device comprising a stepping motor and a driving gear, the stepping motor being fixed to the front cover plate or the rear cover plate of the freezing air duct, the driving gear being fixed to the rotating shaft of the stepping motor, the driving gear being engaged with the gear at one end of the freezing air door, the stepping motor driving the freezing air door to rotate via the driving gear to adjust the air volume of the freezing air outlet; The controller is further configured to: The number of steps of the stepping motor is adjusted according to the damper adjustment value to adjust the opening of the freezing damper.

4. The refrigerator according to claim 1, wherein The obtaining of a corresponding damper adjustment value according to the temperature difference characterization value includes: According to the temperature difference characterization value, the corresponding damper adjustment value is searched from the preset damper adjustment strategy table; the damper adjustment strategy table records several groups of different temperature difference characterization values ​​and their corresponding damper adjustment values, wherein the temperature difference characterization value is directly proportional to the damper adjustment value.

5. A refrigerator freezing damper control method, characterized in that: A freezing air duct is provided in the refrigerator body, and a freezing air outlet and a variable temperature air supply outlet are provided on the freezing air duct. The freezing air outlet is used to provide cold air to the freezing chamber, and the variable temperature air supply outlet is used to provide cold air to the variable temperature chamber. A freezing air damper is provided at the freezing air outlet to control the air volume of the freezing air outlet. Then, the method includes: Obtaining the real-time freezing temperature and the real-time variable temperature, as well as the preset freezing set temperature and the variable temperature set temperature; Calculate the freezing temperature difference between the real-time freezing temperature and the freezing set temperature, and calculate the variable temperature difference between the real-time variable temperature and the variable temperature set temperature; Obtaining the volume of the temperature-changing chamber and the volume of the freezing chamber, and calculating a ratio of the volume of the temperature-changing chamber to the volume of the freezing chamber as a volume coefficient; When it is determined that the opening of the freezing damper needs to be adjusted, the product of the variable temperature difference and the volume coefficient is calculated, and the difference between the product and the freezing temperature difference is calculated as a temperature difference characterization value; A corresponding damper adjustment value is obtained according to the temperature difference characterization value, and the opening of the freezing damper is adjusted according to the damper adjustment value.

6. The refrigerator freezing damper control method according to claim 5, characterized in that: The method further comprises: When it is detected that the gear information of the freezer compartment and the variable temperature chamber meets the preset damper adjustment conditions, it is determined that the opening of the freezer damper needs to be adjusted; wherein, the damper adjustment condition is: the temperature corresponding to the gear information of the variable temperature chamber is lower than the temperature corresponding to the gear information of the freezer compartment.

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