Refrigerator and refrigerator control method

Abstract

The invention discloses a refrigerator and a refrigerator control method, the refrigerator comprises a refrigerator body, at least one chamber is arranged in the refrigerator body, and a heater is arranged in each chamber; the refrigerating system is used for providing power for refrigerating circulation of the refrigerator; the fan is used for conveying the cold air generated by the evaporator into the corresponding compartment; the controller is used for controlling the heater in each chamber to be started after the refrigerator is powered on until the temperature in each chamber is stabilized at the chamber set temperature, and calculating the total heat load of the refrigerator; the refrigerator is controlled to enter a refrigeration mode, and a compressor and a fan are controlled to operate at the initial rotating speed; when it is detected that the load of the refrigerator is increased, the heat load of the newly-added load is calculated; the rotating speed of the compressor is adjusted according to the heat load of the newly-added load, and the rotating speed of the fan is adjusted according to the total heat load and the heat load of the newly-added load. The method can accurately respond to the large cooling capacity demand caused when the load of the refrigerator is increased, so that the purpose of saving the cooling capacity and the electric quantity is achieved.

Description

Technical Field

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

[0002] For a variable-frequency air-cooled refrigerator, the on / off of the compressor and the rotational speed of the fan are usually controlled by detecting the actual temperature of the temperature sensors in each compartment of the refrigerator, so as to control the temperature of each compartment of the refrigerator.

[0003] For example, when the temperature in a certain compartment is higher than the set temperature, the compressor is controlled to start; when the temperature in a certain compartment is lower than the set temperature, the compressor is controlled to stop, and so on in a cycle, so that the temperature in this compartment is within the set temperature. However, generally speaking, the rotational speed of the compressor at a specific ambient temperature is fixed and cannot respond to the large cooling capacity demand caused by an increase in the refrigerator load. When the load increases, it usually causes the compressor to run continuously for a long time. In particular, when an ordinary variable-frequency refrigerator is opened or the ambient temperature rises, it will directly enter the high-speed mode. However, this high-speed mode is usually preset and does not determine the corresponding rotational speed according to the actual demand, which is not accurate enough. Therefore, it will cause waste of cooling capacity and electricity.

[0004] In addition, for determining the rotational speed of the fan according to the ambient temperature, since the required heat load is different at each ambient temperature, and currently the selection of the rotational speed of the fan is still in several fixed frequency bands and cannot intelligently select the rotational speed of the fan according to the heat load of the refrigerator. Therefore, it also cannot accurately respond to the large cooling capacity demand caused by an increase in the refrigerator load, resulting in waste of cooling capacity and electricity. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a refrigerator and a refrigerator control method, which can accurately respond to the large cooling capacity demand caused by an increase in the refrigerator load, so as to achieve the purpose of saving cooling capacity and electricity.

[0006] To achieve the above purpose, the embodiments of the present invention provide a refrigerator, which includes:

[0007] A box body, with at least one compartment inside, and a heater is provided in each compartment;

[0008] A refrigeration system, including a compressor, a condenser, a capillary tube, and an evaporator connected in series in turn to form a loop, for providing power for the refrigeration cycle of the refrigerator;

[0009] A fan, for delivering the cold air generated by the evaporator to the corresponding compartment;

[0010] A controller, for:

[0011] After the refrigerator is powered on, control the heaters in each compartment to turn on until the temperature in each compartment stabilizes at the compartment set temperature, and then calculate the total heat load of the refrigerator;

[0012] Control the refrigerator to enter the refrigeration mode, and control the compressor and the fan to operate at the initial speed;

[0013] When it is detected that the load of the refrigerator increases, calculate the heat load of the newly added load;

[0014] Adjust the speed of the compressor according to the heat load of the newly added load, and adjust the speed of the fan according to the total heat load and the heat load of the newly added load.

[0015] Further, the controller calculates the total heat load of the refrigerator, specifically including:

[0016] Calculate the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature; where the compartment set temperature corresponding to each compartment is T s =T d -T t +T h , T s represents the compartment set temperature, T d represents the temperature of the test condition, T t represents the compartment characteristic temperature, T h represents the laboratory ambient temperature;

[0017] Calculate the sum of the heat loads of all compartments according to the heat load of each compartment, and use it as the total heat load of the refrigerator.

[0018] Further, the controller calculates the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature, specifically including:

[0019] Calculate the heat load of each compartment according to the formula Q 间室 =(E2 - E1) / t; where Q 间室 represents the heat load of the compartment, E1 and E2 respectively represent the starting electric energy and the ending electric energy to stabilize the temperature in the compartment at the corresponding compartment set temperature, and t represents the time required to stabilize the temperature in the compartment at the corresponding compartment set temperature.

[0020] Further, the controller calculates the heat load of the newly added load, specifically including:

[0021] Use a gravity sensor to obtain the mass of the newly added load;

[0022] Calculate the heat load of the newly added load according to the mass of the newly added load and the temperature change when the load temperature of the newly added load drops to the target temperature.

[0023] Further, the controller calculates the heat load of the newly added load according to the mass of the newly added load and the temperature change when the load temperature of the newly added load drops to the target temperature, specifically including:

[0024] According to the formula Q 负载 = m·C·ΔT to calculate the heat load of the newly added load; where Q 负载 represents the heat load of the newly added load, m represents the mass of the newly added load, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change when the load temperature of the newly added load drops from the initial load temperature to the target temperature.

[0025] Further, the controller adjusts the rotational speed of the fan according to the total heat load and the heat load of the newly added load, specifically including:

[0026] When it is detected that the ambient temperature has not changed, according to the formula calculate the adjusted rotational speed of the fan and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, Q 总 represents the total heat load.

[0027] Further, the controller adjusts the rotational speed of the fan according to the total heat load and the heat load of the newly added load, specifically including:

[0028] When it is detected that the ambient temperature has changed, adjust the rotational speed of the fan according to the total heat load, the heat load of the newly added load and the ambient temperature.

[0029] Further, the controller adjusts the rotational speed of the fan according to the total heat load, the heat load of the newly added load and the ambient temperature, specifically including:

[0030] According to the formula calculate the adjusted rotational speed of the fan and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, Q 总Q represents the total heat load, T0 represents the initial ambient temperature, and T represents the changed ambient temperature.

[0031] Further, the controller is further configured to:

[0032] After adjusting the rotational speed of the blower, determine whether the temperature of the compartment where the new load is located is less than a preset temperature threshold;

[0033] If so, control the blower to resume operating at the initial rotational speed;

[0034] If not, control the blower to continue operating at the adjusted rotational speed.

[0035] To achieve the above object, an embodiment of the present invention further provides a refrigerator control method, which is applicable to the refrigerator described in any one of the above, and the method is executed by the controller. The method includes:

[0036] After the refrigerator is powered on, control the heaters in each compartment to turn on until the temperature in each compartment stabilizes at the compartment set temperature, and calculate the total heat load of the refrigerator;

[0037] Control the refrigerator to enter the refrigeration mode, and control the compressor and the blower to both operate at the initial rotational speed;

[0038] When it is detected that the load of the refrigerator increases, calculate the heat load of the new load;

[0039] Adjust the rotational speed of the compressor according to the heat load of the new load, and adjust the rotational speed of the blower according to the total heat load and the heat load of the new load.

[0040] Compared with the prior art, a refrigerator and a refrigerator control method provided by an embodiment of the present invention. The refrigerator includes a box body with at least one compartment inside, and a heater is provided in each compartment; it also includes a refrigeration system including a compressor, a condenser, a capillary tube and an evaporator connected in series in turn to form a loop, which is used to provide power for the refrigeration cycle of the refrigerator; it also includes a fan for delivering the cold air generated by the evaporator to the corresponding compartment; it also includes a controller for: after the refrigerator is powered on, controlling the heaters in each compartment to turn on until the temperature in each compartment stabilizes at the set temperature of the compartment, calculating the total heat load of the refrigerator; controlling the refrigerator to enter the refrigeration mode and controlling the compressor and the fan to operate at the initial speed; when it is detected that the load of the refrigerator increases, calculating the heat load of the newly added load; adjusting the speed of the compressor according to the heat load of the newly added load, and adjusting the speed of the fan according to the total heat load and the heat load of the newly added load. The embodiment of the present invention uses the total heat load of the refrigerator and the heat load of the newly added load to determine the required fan speed and perform corresponding refrigeration and cooling control, which can accurately respond to the large cold quantity demand caused by the increase in the refrigerator load, so as to achieve the purpose of saving cold quantity and electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. 6 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0042] Figure 2 FIG. 10 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0043] Figure 3 FIG. 14 is a schematic diagram of the structure of a refrigeration system of a refrigerator provided by an embodiment of the present invention;

[0044] Figure 4 FIG. 18 is a flowchart of the operation of a controller of a refrigerator provided by an embodiment of the present invention;

[0045] Figure 5 FIG. 22 is a flowchart of the operation of a controller of a refrigerator provided by another embodiment of the present invention;

[0046] Figure 6 FIG. 26 is a schematic flowchart of a refrigerator control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0048] SeeFigure 1 and Figure 2 as shown, where Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention, Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The refrigerator includes a cabinet 100, at least one compartment is provided inside the cabinet 100, and a heater (i.e., a defrost heater) is provided in each compartment. Each compartment is used for storing food materials. Among them, at least one of the at least one compartment includes at least one refrigerating compartment and / or at least one freezing compartment, and different compartments are spaced apart from each other; Figure 2 Taking the illustration as an example, the cabinet 100 of the refrigerator includes both a refrigerating compartment 20 and a freezing compartment 10, and the freezing compartment 10 inside the cabinet 100 is located above the refrigerating compartment 20; it can be understood that the refrigerator further includes at least one door body provided on the cabinet 100, and there is a one-to-one correspondence between each door body and each compartment, and each door body is used to open or close the corresponding compartment.

[0049] It should be noted that Figure 1 and Figure 2 the cabinet 100 of the refrigerator shown adopts a cuboid structure, and Figure 2 the freezing compartment 10 inside the cabinet 100 shown is located above the refrigerating compartment 20. Those skilled in the art can understand that the cabinet 100 can also adopt other shapes, such as a cube, a cylinder, etc. The freezing compartment 10 inside the cabinet 100 can also be located below the refrigerating compartment 20, and the embodiments of the present invention do not make specific limitations.

[0050] The refrigerator further includes a refrigeration system. Referring to Figure 3 shown, it is a schematic diagram of the structure of a refrigeration system of a refrigerator provided by an embodiment of the present invention. The refrigeration system includes a compressor 30, a condenser 40, a capillary tube 50, and an evaporator 60 that are connected in series in sequence to form a loop. The refrigeration system is used to provide power for the refrigeration cycle of the refrigerator; among them, the compressor 30 is mainly used to compress the refrigerant flowing through the refrigeration cycle of the refrigerator to provide power for the refrigeration cycle of the refrigerator; the evaporator 60 is mainly used to provide cold air for the freezing compartment 10 and the refrigerating compartment 20.

[0051] Combined with Figure 3 shown, the refrigerator further includes a fan 70. The fan 70 is used to deliver the cold air generated by the evaporator 60 to the corresponding compartment; for example, external air enters the evaporator 60 for heat exchange to generate air after heat release (i.e., cold air), and the fan 70 sends the air after heat release generated by the evaporator 60 into the freezing compartment 10 and the refrigerating compartment 20.

[0052] It should be noted that, in combination with Figure 2 and Figure 3 As shown, a main air duct with both ends communicating with the freezing compartment 10 is formed on the rear wall of the freezing compartment 10. An evaporator 60 and a blower 70 are provided in the main air duct; a refrigerating air inlet duct and a refrigerating air return duct are provided on the rear wall of the refrigerating compartment 20; wherein, one end of the main air duct communicates with the refrigerating air return duct, and the other end communicates with the refrigerating air inlet duct; a refrigerating air damper is provided between the main air duct and the refrigerating air inlet duct to control the connectivity between the main air duct and the refrigerating air return duct.

[0053] When the refrigerator performs freezing refrigeration, the refrigerating air damper is closed. Under the action of the blower 70, the air in the freezing compartment 10 enters the main air duct from one end of the main air duct, passes through the evaporator 60 in the main air duct, and the air passing through the evaporator 60 is cooled and then returns to the freezing compartment 10, thereby realizing the temperature reduction of the freezing compartment 10.

[0054] When the refrigerator performs refrigerating refrigeration, the refrigerating air damper is opened. Under the action of the blower 70, the air in the refrigerating compartment 20 sequentially passes through the refrigerating air return duct, the main air duct, the refrigerating air damper, and the refrigerating air inlet duct and then returns to the refrigerating compartment 20; wherein, when passing through the main air duct, it is cooled under the action of the evaporator 60 in the main air duct, thereby realizing the temperature reduction of the refrigerating compartment 20.

[0055] In the embodiment of the present invention, the refrigerator further includes a controller, and the controller is used to control the operation of each component in the refrigerator, so that each component of the refrigerator operates to realize various functions of the refrigerator. Further, the controller is used to adopt the technical solution provided by the embodiment of the present invention to perform corresponding control on the refrigerator to solve the technical problems to be solved by the embodiment of the present invention and realize the technical effects that can be achieved by the embodiment of the present invention.

[0056] As one optional embodiment, the controller is used for:

[0057] After the refrigerator is powered on, control the heaters in each compartment to be turned on until the temperature in each compartment is stable at the set temperature of the compartment, and calculate the total heat load of the refrigerator;

[0058] Control the refrigerator to enter the refrigeration mode, and control the compressor and the blower to operate at the initial speed;

[0059] When it is detected that the load of the refrigerator increases, calculate the heat load of the newly added load;

[0060] Adjust the speed of the compressor according to the heat load of the newly added load, and adjust the speed of the blower according to the total heat load and the heat load of the newly added load.

[0061] In combination with Figure 4As shown, it is a working flowchart of a controller of a refrigerator provided by an embodiment of the present invention. When the embodiment of the present invention is specifically implemented, the specific working process of the controller is as follows: After the refrigerator is powered on ( Figure 4 as shown in step S11), after the refrigerator is powered on, control the refrigerator to enter the heat load calculation mode. In the heat load calculation mode, control the compressor of the refrigerator not to start, and control the heater in each compartment of the refrigerator to turn on until the temperature in each compartment stabilizes at the compartment set temperature, and then calculate the total heat load of the refrigerator at the corresponding ambient temperature ( Figure 4 as shown in step S12); then, control the refrigerator to exit the heat load calculation mode, and control the refrigerator to enter the refrigeration mode. In the refrigeration mode, control the compressor of the refrigerator to operate at the initial speed of the compressor, and control the fan of the refrigerator to operate at the initial speed of the fan ( Figure 4 as shown in step S13), so that the refrigerator starts normal refrigeration; during the normal refrigeration process of the refrigerator, detect whether the load of the refrigerator increases ( Figure 4 as shown in step S14). For example, gravity sensors are provided on the shelves corresponding to each compartment of the refrigerator. When it is detected that the door of the refrigerator is opened and then closed, it can be further determined whether the load of the refrigerator increases according to whether the measured value of the gravity sensor changes; when it is detected that the load of the refrigerator increases (for example, new food is put into the refrigerator), calculate the heat load of the new load ( Figure 4 as shown in step S15). The heat load of the new load is equivalent to the amount of cold required to reduce the load temperature of the new load from the temperature when it is put into the refrigerator to the target temperature; then, the speed of the compressor can be adjusted according to the calculated heat load of the new load ( Figure 4 as shown in step S16), so that the compressor matches the corresponding speed according to the heat load of the new load (different compressor speeds correspond to different amounts of cold, and the compressor speed and the amount of cold are in one-to-one correspondence); at the same time, the speed of the fan can be adjusted according to the calculated total heat load of the refrigerator and the calculated heat load of the new load ( Figure 4 as shown in step S17).

[0062] It can be understood that after the controller executes Figure 4 as shown in step S14 to detect whether the load of the refrigerator increases, when it is detected that the load of the refrigerator does not increase, the controller can control the refrigerator to continue normal refrigeration.

[0063] It should be noted that when calculating the total heat load of the refrigerator, the defrost heater of the refrigerator itself can be used, and the reverse heat load calculation method is adopted, that is, the heaters in each compartment of the refrigerator are turned on until the temperature in each compartment stabilizes at the compartment set temperature (run several stable intervals, about several hours), and at this time, the total heat load of the refrigerator can be calculated according to the change of electric energy and the running time; among them, the compartment set temperature can be determined in advance through experimental tests.

[0064] It should be noted that in the embodiments of the present invention, by adjusting the rotational speeds of the compressor and the fan according to the refrigerator heat load and the food heat load, and performing corresponding refrigeration and cooling, it is possible to effectively prevent the waste of cooling capacity and electric energy, and prevent the phenomenon of overheating or overcooling of food. At the same time, it is not affected by the ambient temperature, and the ambient temperature sensor can be omitted, thereby saving costs.

[0065] A refrigerator provided by an embodiment of the present invention includes a box body with at least one compartment provided inside, and a heater is provided in each compartment; it further includes a refrigeration system including a compressor, a condenser, a capillary tube, and an evaporator connected in series in sequence to form a loop for providing power for the refrigeration cycle of the refrigerator; it further includes a fan for delivering the cold air generated by the evaporator to the corresponding compartment; it further includes a controller for: after the refrigerator is powered on, controlling the heaters in each compartment to be turned on until the temperature in each compartment is stabilized at the compartment set temperature, calculating the total heat load of the refrigerator; controlling the refrigerator to enter the refrigeration mode, and controlling the compressor and the fan to operate at the initial rotational speeds; when it is detected that the load of the refrigerator increases, calculating the heat load of the new load; adjusting the rotational speed of the compressor according to the heat load of the new load, and adjusting the rotational speed of the fan according to the total heat load and the heat load of the new load. The embodiments of the present invention utilize the total heat load of the refrigerator and the heat load of the new load to determine the required rotational speed of the fan, and perform corresponding refrigeration and cooling control, which can accurately respond to the large cooling capacity demand caused by the increase in the refrigerator load, thereby achieving the purpose of saving cooling capacity and electric energy.

[0066] As an optional embodiment, the controller calculates the total heat load of the refrigerator, specifically including:

[0067] Calculating the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature; wherein, the compartment set temperature corresponding to each compartment is T s =T d -T t +T h , T s represents the compartment set temperature, T d represents the measured working condition temperature, T t represents the compartment characteristic temperature, T h represents the laboratory ambient temperature;

[0068] Calculating the sum of the heat loads of all compartments according to the heat load of each compartment, and taking it as the total heat load of the refrigerator.

[0069] On the basis of the above embodiments, in the specific implementation of the embodiments of the present invention, the controller executes Figure 4In step S12 shown above, when calculating the total heat load of the refrigerator, the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature can be determined first. Then, based on the electric energy and time required for each compartment, the heat load of each compartment can be calculated respectively. Further, the sum of the heat loads of all compartments can be calculated based on the heat load of each compartment obtained by calculation, and the sum of the heat loads of all compartments obtained by calculation can be used as the total heat load of the refrigerator.

[0070] Among them, the compartment set temperature corresponding to each compartment is T s = T d - T t + T h , T s represents the compartment set temperature, T d represents the temperature of the test condition to be measured (i.e., the temperature of the heat load to be calculated, generally the same as the ambient temperature), T t represents the characteristic temperature of the compartment, T h represents the laboratory ambient temperature.

[0071] Exemplarily, taking the reverse heat load test of the freezer of the refrigerator as an example to determine the compartment set temperature corresponding to the freezer: Under laboratory conditions, with the refrigerator door closed, assuming the temperature of the test condition to be measured is T d = 32 °C, the characteristic temperature of the compartment corresponding to the freezer is T t = -18 °C, and the laboratory ambient temperature is T h = 16 °C. Then, the temperature difference between the characteristic temperature of the freezer compartment and the temperature of the test condition to be measured is T d - T t = 32 °C - (-18 °C) = 50 °C. In the reverse heat load test state, the temperature difference between the freezer and the external environment should be 50 °C. At this time, the target temperature T s should be 50 °C + 16 °C = 66 °C. Therefore, the target set temperature T s (i.e., the compartment set temperature T s ) corresponding to the freezer should be: T s = T d - T t + T h .

[0072] As one optional embodiment, the controller calculates the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature, specifically including:

[0073] Calculating the heat load of each compartment according to the formula Q 间室 = (E2 - E1) / t; among them, Q 间室It represents the heat load of the compartment. E1 and E2 respectively represent the starting electric energy and the ending electric energy for stabilizing the temperature in the compartment at the corresponding compartment set temperature, and t represents the time required to stabilize the temperature in the compartment at the corresponding compartment set temperature.

[0074] Based on the above embodiments, when specifically implementing the embodiments of the present invention, when calculating the heat load of each compartment, the controller can directly calculate the heat load Q of each compartment according to the formula 间室 =(E2 - E1) / t. 间室 Among them, E1 represents the starting electric energy for stabilizing the temperature in the compartment at the corresponding compartment set temperature, E2 represents the ending electric energy for stabilizing the temperature in the compartment at the corresponding compartment set temperature, and t represents the operating time required to stabilize the temperature in the compartment at the corresponding compartment set temperature.

[0075] Exemplarily, according to experimental tests, it can be known that theoretically the temperature in the compartment can be completely stabilized within 12 hours, that is, t ≤ 12h; the values of E1 and E2 can be determined by using the electricity meter function of the refrigerator. By recording the starting electric energy and the ending electric energy during the process of stabilizing the temperature in the compartment through the electricity meter function, and then by reading the recorded values of the electricity meter function, the corresponding values of E1 and E2 can be determined.

[0076] It can be understood that if the refrigerator has only one compartment, the heat load of this one compartment calculated according to the formula Q 间室 =(E2 - E1) / t is the total heat load of the refrigerator; if the refrigerator has multiple compartments, the weighted value (without weight coefficient, just weighted directly) of the heat loads of multiple compartments is used as the total heat load of the refrigerator.

[0077] As one of the optional embodiments, the controller calculates the heat load of the newly added load, specifically including:

[0078] Using a gravity sensor to obtain the mass of the newly added load;

[0079] Calculating the heat load of the newly added load according to the mass of the newly added load and the temperature change amount when the load temperature of the newly added load drops to the target temperature.

[0080] Based on the above embodiments, when specifically implementing the embodiments of the present invention, when the controller executes Figure 4 the step S15 shown, and calculates the heat load of the newly added load, it can first use a gravity sensor to obtain the mass of the newly added load, and determine the temperature change amount of the newly added load when the load temperature of the newly added load drops to the target temperature, and then calculate the heat load of the newly added load according to the determined mass of the newly added load and the temperature change amount of the newly added load.

[0081] It should be noted that in the embodiments of the present invention, a target temperature (i.e., the temperature of the refrigerator setting gear) is preset in advance. This target temperature represents the temperature to which the load needs to be cooled when the load is placed in the refrigerator and cooled or frozen, and this target temperature can be set by the user according to actual needs.

[0082] As one of the optional embodiments, the controller calculates the heat load of the newly added load according to the mass of the newly added load and the temperature change amount when the load temperature of the newly added load drops to the target temperature, specifically including:

[0083] Calculate the heat load of the newly added load according to the formula Q 负载 = m·C·ΔT; where Q 负载 represents the heat load of the newly added load, m represents the mass of the newly added load, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change amount when the load temperature of the newly added load drops from the initial load temperature to the target temperature.

[0084] Based on the above embodiments, when the embodiments of the present invention are specifically implemented, when the controller calculates the heat load of the newly added load according to the mass of the newly added load and the temperature change amount of the newly added load, it can directly calculate the heat load Q of the newly added load according to the formula Q 负载 = m·C·ΔT; m represents the mass of the newly added load obtained by using the gravity sensor, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change amount when the load temperature of the newly added load drops from the initial load temperature to the target temperature, that is, ΔT = T2 - T1, T2 is the initial load temperature of the newly added load (generally the same as the ambient temperature), and T1 is the required target temperature. 负载 ; m represents the mass of the newly added load obtained by using the gravity sensor, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change amount when the load temperature of the newly added load drops from the initial load temperature to the target temperature, that is, ΔT = T2 - T1, T2 is the initial load temperature of the newly added load (generally the same as the ambient temperature), and T1 is the required target temperature.

[0085] It should be noted that taking the newly added load as food as an example, considering that different food types generally have different fixed thermophysical properties, therefore, when the newly added load only includes one type of food, C is the fixed thermophysical property of this one type of food, and when the newly added load includes multiple types of food, C can take the intermediate value of the fixed thermophysical properties of these multiple types of food.

[0086] As one of the optional embodiments, the controller adjusts the rotation speed of the fan according to the total heat load and the heat load of the newly added load, specifically including:

[0087] When it is detected that the ambient temperature has not changed, calculate the adjusted rotation speed of the fan according to the formula and control the fan to operate at the adjusted rotation speed; where V represents the adjusted rotation speed, V0 represents the initial rotation speed of the fan, V max represents the maximum rotation speed of the fan, k represents the proportionality coefficient, Q 负载Indicates the heat load of the newly added load, Q 总 Indicates the total heat load.

[0088] Based on the above embodiments, in the specific implementation of the embodiments of the present invention, when the controller executes Figure 4 the step S17 shown, and adjusts the speed of the blower according to the total heat load of the refrigerator and the heat load of the newly added load, if the influence of the external environmental temperature is considered, it should first detect whether the external environmental temperature has changed before and after the newly added load is put into the refrigerator. For example, a ambient temperature sensor can be used to detect in real time whether the external environmental temperature has changed; when it is detected that the external environmental temperature has not changed, the adjusted speed V of the blower can be directly calculated according to the formula and the blower is controlled to operate at the calculated adjusted speed V, so as to achieve stepless speed change; where V0 represents the initial speed of the blower, V max represents the maximum speed of the blower, k represents a proportionality coefficient, Q 负载 indicates the heat load of the newly added load, Q 总 represents the total heat load of the refrigerator.

[0089] It should be noted that in the embodiments of the present invention, the setting of the proportionality coefficient k is to prevent calculation errors. Generally, the value of k is 0.8 to 1.1. If calculation errors are not considered, k can also be omitted, that is, the adjusted speed V of the blower is calculated according to the formula to obtain the adjusted speed V of the blower.

[0090] It can be understood that if the influence of the external environmental temperature is not considered, it is not necessary to detect whether the external environmental temperature has changed before and after the newly added load is put into the refrigerator, and the adjusted speed V of the blower is directly calculated according to the formula to obtain the adjusted speed V of the blower.

[0091] As one of the optional embodiments, the controller adjusts the speed of the blower according to the total heat load and the heat load of the newly added load, specifically including:

[0092] When it is detected that the environmental temperature has changed, the speed of the blower is adjusted according to the total heat load, the heat load of the newly added load and the environmental temperature.

[0093] Based on the above embodiments, in the specific implementation of the embodiments of the present invention, when the controller executes Figure 4In step S17 shown above, when adjusting the rotational speed of the blower according to the total heat load of the refrigerator and the heat load of the newly added load, if the influence of the external environmental temperature is considered, it should first be detected whether the external environmental temperature has changed before and after the newly added load is placed in the refrigerator; when it is detected that the external environmental temperature has changed, in addition to adjusting the rotational speed of the blower according to the total heat load of the refrigerator and the heat load of the newly added load, the influence of the external environmental temperature also needs to be considered, that is, it is necessary to adjust the rotational speed of the blower according to the total heat load of the refrigerator, the heat load of the newly added load, and the environmental temperature.

[0094] As one optional embodiment, the controller adjusts the rotational speed of the blower according to the total heat load, the heat load of the newly added load, and the environmental temperature, which specifically includes:

[0095] According to the formula Calculate the adjusted rotational speed of the blower, and control the blower to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the blower, V max Represents the maximum rotational speed of the blower, k represents the proportionality coefficient, Q 负载 Represents the heat load of the newly added load, Q 总 Represents the total heat load, T0 represents the initial environmental temperature, and T represents the changed environmental temperature.

[0096] Based on the above embodiment, in the specific implementation of the embodiment of the present invention, when the controller adjusts the rotational speed of the blower according to the total heat load of the refrigerator, the heat load of the newly added load, and the environmental temperature, it can directly calculate according to the formula Obtain the adjusted rotational speed V of the blower, and control the blower to operate at the calculated adjusted rotational speed V, and stepless speed change can be achieved; where V0 represents the initial rotational speed of the blower, V max Represents the maximum rotational speed of the blower, k represents the proportionality coefficient, Q 负载 Represents the heat load of the newly added load, Q 总 Represents the total heat load of the refrigerator, T0 represents the initial environmental temperature (that is, the external environmental temperature before or when the newly added load is placed in the refrigerator), and T represents the changed external environmental temperature (that is, the external environmental temperature after a period of time after the newly added load is placed in the refrigerator, for example, the environmental temperature after 1 day).

[0097] It can be understood that the external environmental temperature can be detected periodically. When the external environmental temperature is obtained by each real-time detection and it is determined that the real-time detected external environmental temperature has changed compared with the initial environmental temperature, the adjusted rotational speed V of the blower can be recalculated according to the formula And control the blower to operate at the recalculated adjusted rotational speed V.

[0098] As one of the optional embodiments, the controller is further configured to:

[0099] After adjusting the rotational speed of the blower, determine whether the temperature of the compartment where the new load is located is less than a preset temperature threshold;

[0100] If so, control the blower to resume operating at the initial rotational speed;

[0101] If not, control the blower to continue operating at the adjusted rotational speed.

[0102] Combined with Figure 5 As shown, it is a flowchart of the operation of a controller of a refrigerator provided by another embodiment of the present invention. On the basis of the above embodiment, in the specific implementation of the embodiment of the present invention, after the controller executes Figure 4 The step S17 shown in the figure to adjust the rotational speed of the blower, it is further configured to further determine whether the temperature of the compartment where the new load is located is less than a preset temperature threshold ( Figure 5 The step S18 shown in the figure); when it is determined that the temperature of the compartment where the new load is located is less than the preset temperature threshold, restore the rotational speed of the blower to the initial rotational speed of the blower, that is, control the blower to operate at the initial rotational speed of the blower ( Figure 5 The step S19 shown in the figure); when it is determined that the temperature of the compartment where the new load is located is not less than the preset temperature threshold, control the blower to continue operating at the currently obtained adjusted rotational speed ( Figure 5 The step S20 shown in the figure).

[0103] It can be understood that for whether the temperature of the compartment is less than the preset temperature threshold, it can also be periodically judged. In each judgment, as long as it is determined that the temperature of the compartment is greater than or equal to the preset temperature threshold, control the blower to continue operating at the currently obtained adjusted rotational speed and wait for the next judgment until it is determined that the temperature of the compartment is less than the preset temperature threshold, indicating that the temperature of the compartment has stabilized, and the rotational speed of the blower can be restored to the initial rotational speed of the blower.

[0104] It should be noted that in the embodiment of the present invention, the temperature threshold can be set according to the startup temperature. For example, the temperature threshold = startup temperature + 3°C; where the startup temperature refers to the startup temperature corresponding to the temperature sensor in the compartment, and generally, it has been preset several degrees to turn on and several degrees to turn off, which is a specific value at a specific gear.

[0105] The embodiment of the present invention also provides a refrigerator control method. Referring to Figure 6 As shown, it is a schematic flowchart of a refrigerator control method provided by an embodiment of the present invention. The method is applicable to the refrigerator described in any of the above embodiments. The method is executed by the controller, and the method includes steps S101 to S104:

[0106] Step S101: After the refrigerator is powered on, control the heaters in each compartment to turn on until the temperature in each compartment stabilizes at the compartment set temperature, and then calculate the total heat load of the refrigerator.

[0107] Step S102: Control the refrigerator to enter the refrigeration mode, and control the compressor and the fan to operate at the initial speed.

[0108] Step S103: When it is detected that the load of the refrigerator increases, calculate the heat load of the newly added load.

[0109] Step S104: Adjust the speed of the compressor according to the heat load of the newly added load, and adjust the speed of the fan according to the total heat load and the heat load of the newly added load.

[0110] In some embodiments, calculating the total heat load of the refrigerator specifically includes:

[0111] Calculate the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature; wherein, the compartment set temperature corresponding to each compartment is T s =T d -T t +T h , T s represents the compartment set temperature, T d represents the temperature of the working condition to be measured, T t represents the compartment characteristic temperature, T h represents the laboratory ambient temperature;

[0112] Calculate the sum of the heat loads of all compartments according to the heat load of each compartment, and use it as the total heat load of the refrigerator.

[0113] In some embodiments, calculating the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature specifically includes:

[0114] Calculate the heat load of each compartment according to the formula Q 间室 =(E2 - E1) / t; wherein, Q 间室 represents the heat load of the compartment, E1 and E2 respectively represent the starting electric energy and the ending electric energy for stabilizing the temperature in the compartment at the corresponding compartment set temperature, and t represents the time required to stabilize the temperature in the compartment at the corresponding compartment set temperature.

[0115] In some embodiments, calculating the heat load of the newly added load specifically includes:

[0116] Use a gravity sensor to obtain the mass of the newly added load;

[0117] Calculate the heat load of the newly added load according to the mass of the newly added load and the temperature change when the load temperature of the newly added load drops to the target temperature.

[0118] In some embodiments, the calculating the heat load of the newly added load according to the mass of the newly added load and the temperature change when the load temperature of the newly added load drops to the target temperature specifically includes:

[0119] Calculate the heat load of the newly added load according to the formula Q 负载 = m·C·ΔT; where Q 负载 represents the heat load of the newly added load, m represents the mass of the newly added load, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change when the load temperature of the newly added load drops from the initial load temperature to the target temperature.

[0120] In some embodiments, the adjusting the rotational speed of the fan according to the total heat load and the heat load of the newly added load specifically includes:

[0121] When it is detected that the ambient temperature has not changed, calculate the adjusted rotational speed of the fan according to the formula and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, Q 总 represents the total heat load.

[0122] In some embodiments, the adjusting the rotational speed of the fan according to the total heat load and the heat load of the newly added load specifically includes:

[0123] When it is detected that the ambient temperature has changed, adjust the rotational speed of the fan according to the total heat load, the heat load of the newly added load, and the ambient temperature.

[0124] In some embodiments, the adjusting the rotational speed of the fan according to the total heat load, the heat load of the newly added load, and the ambient temperature specifically includes:

[0125] Calculate the adjusted rotational speed of the fan according to the formula and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, Q 总Q represents the total heat load, T0 represents the initial ambient temperature, and T represents the changed ambient temperature.

[0126] In some embodiments, the method further includes:

[0127] After adjusting the rotational speed of the blower, determine whether the temperature of the compartment where the new load is located is less than a preset temperature threshold;

[0128] If so, control the blower to resume operating at the initial rotational speed;

[0129] If not, control the blower to continue operating at the adjusted rotational speed.

[0130] It should be noted that a refrigerator control method provided by an embodiment of the present invention can implement all the working processes of the refrigerator described in any of the above embodiments. The specific implementation scheme corresponding to the refrigerator control method and the achieved technical effects are respectively the same as the specific implementation scheme and the achieved technical effects of the refrigerator described in the above embodiments, and will not be elaborated here.

[0131] In summary, a refrigerator and a refrigerator control method provided by an embodiment of the present invention. The refrigerator includes a box body with at least one compartment provided inside, and a heater is provided in each compartment; it further includes a refrigeration system including a compressor, a condenser, a capillary tube, and an evaporator connected in series in sequence to form a loop for providing power for the refrigeration cycle of the refrigerator; it further includes a blower for delivering the cold air generated by the evaporator to the corresponding compartment; it further includes a controller for: after the refrigerator is powered on, controlling the heaters in each compartment to turn on until the temperature in each compartment stabilizes at the set temperature of the compartment, calculating the total heat load of the refrigerator; controlling the refrigerator to enter the refrigeration mode, and controlling the compressor and the blower to both operate at the initial rotational speed; when it is detected that the load of the refrigerator increases, calculating the heat load of the new load; adjusting the rotational speed of the compressor according to the heat load of the new load, and adjusting the rotational speed of the blower according to the total heat load and the heat load of the new load. The embodiment of the present invention uses the total heat load of the refrigerator and the heat load of the new load to determine the required rotational speed of the blower, and performs corresponding refrigeration and cooling control, which can accurately respond to the large cold quantity demand caused by the increase in the refrigerator load, so as to achieve the purpose of saving cold quantity and electricity.

[0132] The above are only some embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A refrigerator, characterized in that, The refrigerator includes: A cabinet with at least one compartment inside, and a heater is provided in each compartment; A refrigeration system including a compressor, a condenser, a capillary tube, and an evaporator connected in series in turn to form a loop, for providing power for the refrigeration cycle of the refrigerator; A blower for delivering the cold air generated by the evaporator to the corresponding compartment; A controller for: After the refrigerator is powered on, controlling the heaters in each compartment to turn on, and calculating the total heat load of the refrigerator until the temperature in each compartment stabilizes at the set temperature of the compartment; Controlling the refrigerator to enter the refrigeration mode, and controlling the compressor and the blower to operate at the initial speed; When it is detected that the load of the refrigerator increases, calculating the heat load of the new load; Adjusting the speed of the compressor according to the heat load of the new load, and adjusting the speed of the blower according to the total heat load and the heat load of the new load.

2. The refrigerator according to claim 1, characterized in that, The controller calculates the total heat load of the refrigerator, specifically including: Calculate the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding compartment set temperature; wherein, the compartment set temperature corresponding to each compartment is T s = T d - T t + T h , T s represents the compartment set temperature, T d represents the temperature of the test condition to be measured, T t represents the compartment characteristic temperature, T h represents the laboratory ambient temperature; Calculating the sum of the heat loads of all compartments according to the heat load of each compartment, and taking it as the total heat load of the refrigerator.

3. The refrigerator according to claim 2, wherein The controller calculates the heat load of each compartment according to the electric energy and time required to stabilize the temperature in each compartment at the corresponding set temperature of the compartment, specifically including: Calculate the heat load of each compartment according to the formula Q 间室 =(E2 - E1) / t; where Q 间室 represents the heat load of the compartment, E1 and E2 respectively represent the starting electric energy and the ending electric energy for stabilizing the temperature in the compartment at the corresponding compartment set temperature, and t represents the time required to stabilize the temperature in the compartment at the corresponding compartment set temperature.

4. The refrigerator according to claim 1, wherein, The controller calculates the heat load of the new load, specifically including: Using a gravity sensor to obtain the mass of the new load; Calculating the heat load of the new load according to the mass of the new load and the temperature change amount when the load temperature of the new load drops to the target temperature.

5. The refrigerator according to claim 4, characterized in that, The controller calculates the heat load of the new load according to the mass of the new load and the temperature change amount when the load temperature of the new load drops to the target temperature, specifically including: According to the formula Q 负载 = m·C·ΔT, calculate the heat load of the newly added load; where Q 负载 represents the heat load of the newly added load, m represents the mass of the newly added load, C represents the thermophysical property of the newly added load, and ΔT represents the temperature change when the load temperature of the newly added load decreases from the initial load temperature to the target temperature.

6. The refrigerator according to claim 1, wherein The controller adjusts the speed of the blower according to the total heat load and the heat load of the new load, specifically including: When it is detected that the ambient temperature has not changed, calculate the adjusted rotational speed of the fan according to the formula and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, and Q 总 represents the total heat load.

7. The refrigerator according to claim 1, characterized in that, The controller adjusts the speed of the blower according to the total heat load and the heat load of the new load, specifically including: When it is detected that the ambient temperature changes, adjusting the speed of the blower according to the total heat load, the heat load of the new load, and the ambient temperature.

8. The refrigerator according to claim 7, characterized in that, The controller adjusts the speed of the blower according to the total heat load, the heat load of the new load, and the ambient temperature, specifically including: According to the formula calculate the adjusted rotational speed of the fan and control the fan to operate at the adjusted rotational speed; where V represents the adjusted rotational speed, V0 represents the initial rotational speed of the fan, V max represents the maximum rotational speed of the fan, k represents the proportionality coefficient, Q 负载 represents the heat load of the newly added load, Q 总 represents the total heat load, T0 represents the initial ambient temperature, and T represents the changed ambient temperature.

9. The refrigerator according to any one of claims 1 to 8, characterized in that, The controller is further used for: After adjusting the speed of the blower, determining whether the temperature of the compartment where the new load is located is less than a preset temperature threshold; If so, controlling the blower to resume operating at the initial speed; If not, controlling the blower to continue operating at the adjusted speed.

10. A refrigerator control method, characterized in that, Applicable to the refrigerator according to any one of claims 1 to 9, the method is executed by the controller, and the method includes: After the refrigerator is powered on, controlling the heaters in each compartment to turn on, and calculating the total heat load of the refrigerator until the temperature in each compartment stabilizes at the set temperature of the compartment; Controlling the refrigerator to enter the refrigeration mode, and controlling the compressor and the blower to operate at the initial speed; When it is detected that the load of the refrigerator increases, calculating the heat load of the new load; Adjust the rotational speed of the compressor according to the heat load of the newly added load, and adjust the rotational speed of the fan according to the total heat load and the heat load of the newly added load.

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