Refrigerator and control method thereof

Abstract

The embodiment of the invention provides a refrigerator and a control method thereof, and belongs to the technical field of household appliances. The refrigerator comprises a refrigerator body, a refrigerator door and a refrigerator door, the door body is configured to open or close the pick-and-place opening; the refrigerating system is configured to provide cooling capacity, the refrigerating system comprises a compressor, a condenser, a throttler and an evaporator which are sequentially and circularly connected, and the evaporator comprises a main body pipeline; the first temperature measuring device is configured to measure the temperature of the evaporator; the heating device comprises a conduction heating unit and a radiation heating unit which are connected in parallel; the control main board is connected with the temperature measuring device and the heating device, and the control main board is configured to obtain the opening and closing frequency of the door body within the preset duration; determining a target heating unit according to the switching frequency; and the target heating unit is controlled to work according to the target heating power, so that the temperature of the evaporator reaches the first preset temperature. According to the refrigerator, the evaporator can be prevented from being overheated, the energy consumption increment in the defrosting period and the energy consumption increment in the recovery period are reduced, and the energy consumption of the refrigerator is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of household appliances, and more specifically, to a refrigerator and a control method thereof. Background Art

[0002] A refrigerator is a refrigeration device used to keep food and other items at a constant low temperature. The refrigeration system of a refrigerator usually includes a compressor, a condenser, a throttle, and an evaporator that are connected in a loop. During the operation of the refrigeration system, the evaporator has a low temperature, so water vapor in the air condenses on the evaporator to form a frost layer. The refrigerator is generally also equipped with a heating device to melt the frost layer on the evaporator.

[0003] In the related art, the heating device generally includes a conduction heater and a radiation heater. The conduction heater is attached to the main pipe of the evaporator and mainly melts the frost layer on the main pipe by heat conduction. The radiation heater is arranged below the evaporator and mainly melts the frost layer on the main pipe and other parts of the evaporator by heat radiation.

[0004] However, the heating device in the related art increases the energy consumption of the refrigerator and reduces user satisfaction when defrosting the evaporator. Summary of the invention

[0005] The embodiment of the present application provides a refrigerator and a control method thereof, which can solve the problem that the energy consumption of the refrigerator is increased and the user satisfaction is reduced when the heating device defrosts the evaporator.

[0006] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0007] A box body is constructed with a refrigeration compartment having a take-in and put-out opening;

[0008] A door body, which is configured to open or close the access opening;

[0009] A refrigeration system, which is configured to provide cold air to the refrigeration room, the refrigeration system comprising a compressor, a condenser, a throttle and an evaporator which are cyclically connected in sequence, and the evaporator comprises a main pipeline;

[0010] a first temperature measuring device configured to measure the temperature of the evaporator;

[0011] A heating device, comprising a conduction heating unit and a radiation heating unit connected in parallel, wherein the conduction heating unit is configured to defrost the main pipeline, and the radiation heating unit is configured to defrost the evaporator from below the evaporator;

[0012] A control mainboard, the control mainboard is connected to the temperature measuring device and the heating device, and the control mainboard is configured as follows:

[0013] Obtaining the frequency of opening and closing of the door within a preset time period;

[0014] Determining a target heating unit according to the switching frequency;

[0015] The target heating unit is controlled to operate according to the target heating power so that the temperature of the evaporator reaches a first preset temperature.

[0016] The refrigerator in the embodiment of the present application represents the frequency of user use of the refrigerator by the frequency of opening and closing of the door within a preset time period, determines the target heating unit and the target heating power in the heating device according to the opening and closing frequency, and controls the target heating unit to operate according to the target heating power to melt the frost layer on the evaporator, and can prevent overheating of the evaporator, thereby reducing the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reducing the energy consumption of the refrigerator and improving customer satisfaction.

[0017] In some embodiments of the present application, the control main board is configured to: determine whether the switching frequency is 0; if the switching frequency is 0, determine that the target heating unit is the radiation heating unit; if the switching frequency is not 0, determine that the target heating unit is the radiation heating unit and the conduction heating unit.

[0018] With this setting, due to the influence of the cold air flow direction of the refrigerator, the frost thickness in the area above the evaporator is usually less than that in the area below, and the area above the evaporator is the main pipeline. If the switching frequency is 0, it is determined that the user is not using the refrigerator, and the frost layer on the evaporator is thin and concentrated in the area below the evaporator. At this time, it is determined that the target heating unit is a radiation heating unit. Subsequently, the radiation heating unit can be controlled to mainly defrost the area below the evaporator, and there is no need to control the conduction heating unit to defrost the main pipeline of the evaporator. Even if there is a frost layer on the main pipeline, it can be melted by the heat radiated by the radiation heating unit. The energy consumption of the heating device can be reduced, thereby reducing the incremental energy consumption of defrosting and reducing the energy consumption of the refrigerator.

[0019] If the switching frequency is not 0, it is determined that the user is using the refrigerator, and the upper and lower areas of the evaporator are frosted, and the frost layer is thick. At this time, the target heating unit is determined to be the radiation heating unit and the conduction heating unit. Subsequently, the radiation heating unit and the conduction heating unit can be controlled to defrost the lower area of ​​the evaporator and the upper area with the main pipeline, which increases the defrosting heat, enhances the defrosting effect, and shortens the defrosting time, thereby reducing the defrosting energy consumption increment and reducing the energy consumption of the refrigerator.

[0020] In some embodiments of the present application, if the target heating unit is the radiation heating unit, the control mainboard is configured to: control the radiation heating unit to operate according to a first target heating power so that the temperature of the evaporator reaches a first preset temperature.

[0021] In this way, when the temperature of the evaporator reaches the first preset temperature, it can be determined that the frost layer on the evaporator is completely melted. When the temperature of the evaporator reaches the first preset temperature, the control mainboard can control the radiation heating unit to stop working to prevent the evaporator from being overheated and causing the temperature to be too high, thereby reducing the energy consumed during the refrigerator's recovery to the refrigeration state, that is, reducing the incremental energy consumption during the recovery period, thereby reducing the energy consumption of the refrigerator.

[0022] In some embodiments of the present application, if the target heating unit is the radiation heating unit and the conduction heating unit, the control main board is configured to: obtain a preset correspondence relationship, the preset correspondence relationship includes multiple switching frequency ranges, and a heating power corresponding to each of the switching frequency ranges; determine a second target heating power in the preset correspondence relationship according to the switching frequency, and the second target heating power is greater than the first target heating power; control the conduction heating unit to operate at a preset power less than the second target heating power, and control the radiation heating unit to operate at the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

[0023] Such an arrangement can make the heating power of the conduction heating unit smaller than the heating power of the radiation heating unit, so that the heat in the upper area of ​​the evaporator is smaller than the heat in the lower area, so as to prevent the conduction heating unit from overheating the main pipeline of the evaporator, thereby protecting the main pipeline of the evaporator and melting the frost layer on the main pipeline to ensure the defrosting effect of the evaporator.

[0024] In addition, through the preset corresponding relationship, the second target heating power can be conveniently determined according to the switching frequency range. Different switching frequency ranges correspond to different heating powers, so that the target heating power can be adjusted according to the thickness of the frost layer on the evaporator to prevent overheating of the evaporator, reduce the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reduce the energy consumption of the refrigerator, and improve customer satisfaction.

[0025] In some embodiments of the present application, the control main board is configured to: obtain the temperature of the evaporator; determine whether the temperature of the evaporator reaches a second preset temperature, the second preset temperature is lower than the first preset temperature; if the temperature of the evaporator reaches the second preset temperature, control the conduction heating unit to stop working, and control the radiation heating unit to continue working according to the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

[0026] In this way, if the temperature of the evaporator reaches the second preset temperature, it can be determined that the frost layer of the main pipeline of the evaporator has melted or is basically melted, then the controller controls the conductive heating unit to stop working, and controls the radiant heating unit to continue working according to the second target heating power to melt the frost layer on other parts of the evaporator and the remaining frost layer on the main pipeline, until the temperature of the evaporator reaches the first preset temperature, that is, the frost layer on the evaporator is completely melted. In this way, it can prevent the main pipeline from being overheated while ensuring the defrosting effect of the evaporator, play a role in protecting the main pipeline, and reduce the energy consumption of the conductive heating unit, reduce the incremental energy consumption of defrosting, and reduce the energy consumption of the refrigerator.

[0027] In some embodiments of the present application, the radiation heating unit includes a voltage regulating module, a first switch and a radiation heater, the first end of the voltage regulating module is connected to the control mainboard, the second end of the voltage regulating module is connected to the first end of the first switch, the second end of the first switch is connected to the first end of the radiation heater, and the second end of the radiation heater is connected to the control mainboard; the control mainboard is configured as follows: if the target heating unit includes the radiation heating unit, the first switch is controlled to be in a closed state, and the voltage of the voltage regulating module is adjusted so that the radiation heater operates according to the target heating power.

[0028] In this way, if the target heating unit includes a radiation heating unit, the control mainboard can control the first switch to be in a closed state so that the radiation heater is connected to the control mainboard. The control mainboard can have a power supply module to provide voltage and current to the radiation heater so that the radiation heater can work to generate heat. The control mainboard can adjust the voltage of the voltage regulating module to make the radiation heater work according to the target heating power.

[0029] In some embodiments of the present application, the radiation heating unit also includes a first fuse, the first end of the first fuse is connected to the second end of the radiation heater, and the second end of the first fuse is connected to the control main board; the refrigerator also includes a second temperature measuring device, and the second temperature measuring device is configured to measure the temperature of the radiation heater; the control main board is configured to: obtain the temperature of the radiation heater; if the temperature of the radiation heater exceeds a first preset fuse temperature, control the first fuse to disconnect.

[0030] Such an arrangement can protect the radiation heater from overheating and reduce potential safety hazards.

[0031] In some embodiments of the present application, the conductive heating unit includes a second switch and a conductive heater, the first end of the second switch is connected to the control main board, the second end of the second switch is connected to the first end of the conductive heater, and the second end of the conductive heater is connected to the control main board; the control main board is configured to: if the target heating unit includes a conductive heating unit, control the second switch to be closed to enable the conductive heater to work.

[0032] In this way, if the target heating unit includes a conductive heating unit, the control mainboard can control the second switch to be in a closed state to connect the conductive heater to the control mainboard. The control mainboard can have a power module to provide voltage and current to the conductive heater, so that the conductive heater can work to generate heat.

[0033] In some embodiments of the present application, the conduction heating unit also includes a second fuse, a first end of the second fuse is connected to the second end of the conduction heater, and the second end of the second fuse is connected to the control main board; the refrigerator also includes a third temperature measuring device, and the third temperature measuring device is configured to measure the temperature of the conduction heater; the control main board is configured to: obtain the temperature of the conduction heater; if the temperature of the conduction heater exceeds a second preset fuse temperature, control the second fuse to disconnect.

[0034] Such an arrangement can protect the conduction heater from overheating and reduce potential safety hazards.

[0035] In a second aspect, an embodiment of the present application provides a method for controlling a refrigerator, the refrigerator comprising:

[0036] A box body is constructed with a refrigeration compartment having a take-in and put-out opening;

[0037] A door body, which is configured to open or close the access opening;

[0038] A refrigeration system, which is configured to provide cold air to the refrigeration room, the refrigeration system comprising a compressor, a condenser, a throttle and an evaporator which are cyclically connected in sequence, and the evaporator comprises a main pipeline;

[0039] a first temperature measuring device configured to measure the temperature of the evaporator;

[0040] A heating device, comprising a conduction heating unit and a radiation heating unit connected in parallel, wherein the conduction heating unit is configured to defrost the main pipeline, and the radiation heating unit is configured to defrost the evaporator;

[0041] The control method comprises:

[0042] Obtaining the frequency of opening and closing of the door within a preset time period;

[0043] Determining a target heating unit according to the switching frequency;

[0044] The target heating unit is controlled to operate according to the target heating power so that the temperature of the evaporator reaches a first preset temperature.

[0045] The control method of the refrigerator in the embodiment of the present application represents the frequency of the user's use of the refrigerator through the frequency of opening and closing of the door within a preset time period, determines the target heating unit and the target heating power in the heating device according to the opening and closing frequency, and controls the target heating unit to operate according to the target heating power to melt the frost layer on the evaporator, and can prevent overheating of the evaporator, thereby reducing the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reducing the energy consumption of the refrigerator and improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0047] Figure 1 A schematic diagram of the three-dimensional structure of a refrigerator according to an embodiment of the present application;

[0048] Figure 2 for Figure 1 Schematic diagram of the structure of the middle box and refrigeration system;

[0049] Figure 3 for Figure 2 The schematic diagram of the structure of the evaporator and the heating device;

[0050] Figure 4 is a schematic diagram of the circuit structure of the heating device;

[0051] Figure 5 This is a schematic diagram of the hardware structure connection of the refrigerator in the embodiment of the present application;

[0052] Figure 6 The process diagram of the refrigerator control method of the present application embodiment is as follows: Figure 1 ;

[0053] Figure 7 The process diagram of the refrigerator control method of the present application embodiment is as follows: Figure 2 ;

[0054] Figure 8 The process diagram of the refrigerator control method of the present application embodiment is as follows: Figure 3 ;

[0055] Fig. 9 The process diagram of the refrigerator control method of the present application embodiment is as follows: Figure 4 ;

[0056] Fig.10 This is a flow chart of a refrigerator control method in another implementation of the embodiment of the present application;

[0057] Fig.11 This is a flow chart of a refrigerator control method in another implementation of the embodiment of the present application;

[0058] Fig.12 This is a flow chart of a refrigerator control method in another implementation of the embodiment of the present application;

[0059] Fig.13 This is a flow chart of a refrigerator control method in another implementation of the embodiment of the present application;

[0060] Fig.14 This is a flow chart of a refrigerator control method in another implementation of the embodiment of the present application;

[0061] Fig.15 This is a flow chart of a refrigerator control method in another implementation of an embodiment of the present application.

[0062] Reference numerals:

[0063] 100- cabinet;

[0064] 110-refrigeration compartment; 120-outer casing;

[0065] 130- liner;

[0066] 200-door body;

[0067] 300-Refrigeration system;

[0068] 310-compressor; 320-condenser;

[0069] 330-throttle; 340-evaporator;

[0070] 341-main pipeline;

[0071] 400- radiant heating unit;

[0072] 500-Conduction heating unit. DETAILED DESCRIPTION

[0073] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0074] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0075] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0076] In the related art, the refrigeration system of a refrigerator usually includes a compressor, a condenser, a throttle and an evaporator that are connected in a loop. The compressor is used to compress the refrigerant vapor to generate high-temperature and high-pressure refrigerant vapor, and transport the refrigerant vapor to the condenser. The condenser is used to liquefy the high-temperature and high-pressure refrigerant vapor to generate high-temperature and low-pressure refrigerant liquid, and transport the refrigerant liquid to the throttle. After the throttle reduces the pressure of the refrigerant cold liquid, the high-temperature and low-pressure refrigerant liquid is converted into a low-pressure and low-temperature refrigerant liquid, and the low-pressure and low-temperature refrigerant liquid is transported to the evaporator. After receiving the low-pressure and low-temperature refrigerant liquid, the evaporator makes it boil under isobaric conditions, absorbs heat and vaporizes, so as to lower the temperature in the refrigerator.

[0077] During the operation of the refrigeration system, the evaporator has a low temperature, and the water vapor in the air will condense on the evaporator to form a frost layer, which will increase the heat transfer resistance of the evaporator, resulting in a decrease in the overall efficiency of the refrigeration system and an increase in power consumption. Therefore, refrigerators in the related art are usually provided with a heating device for melting the frost layer on the evaporator. The heating device usually includes a conduction heater and a radiation heater. The conduction heater fits the main pipeline of the evaporator and melts the frost layer on the main pipeline mainly by heat conduction. The radiation heater is arranged below the evaporator and mainly melts the frost layer on the main pipeline and other parts of the evaporator by heat radiation.

[0078] However, the heating device in the related art increases the energy consumption of the refrigerator and reduces the technical problem of user satisfaction during the process of defrosting the evaporator. The inventors have found that the reason is that in order to ensure that the frost layer on the evaporator can be completely melted, the conduction heater and the radiation heater are both operated at maximum power. During the operation of the refrigeration system, the thickness of the frost layer on the evaporator is inconsistent due to different frequencies of use by users. If the conduction heater and the evaporation heater are both operated at maximum power, when the thickness of the frost layer on the evaporator is thin, after the frost layer on the evaporator melts, the conduction heater and the evaporation heater continue to heat, which will overheat the evaporator, resulting in an increase in the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, thereby increasing the energy consumption of the refrigerator and reducing customer satisfaction.

[0079] In view of this, an embodiment of the present application provides a refrigerator and a control method thereof, which characterizes the frequency of a user using the refrigerator by the frequency of opening and closing the door within a preset time period, determines the target heating unit and the target heating power in the heating device according to the opening and closing frequency, and controls the target heating unit to operate according to the target heating power to melt the frost layer on the evaporator, and can prevent overheating of the evaporator, thereby reducing the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reducing the energy consumption of the refrigerator and improving customer satisfaction.

[0080] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0081] It should be noted that the incremental energy consumption during the defrosting period refers to the additional energy consumption generated by the refrigerator due to defrosting. The incremental energy consumption during the recovery period refers to the additional energy consumption generated by the refrigerator resuming refrigeration after defrosting.

[0082] refer to Figure 1 The embodiment of the present application provides a refrigerator, comprising a box body 100, a door body 200 and a refrigeration system 300. The box body 100 is configured with a refrigeration compartment 110 having a take-out opening. The door body 200 is used to open or close the take-out opening. The refrigeration system 300 is used to provide coldness to the refrigeration compartment 110 so that the environment in the refrigeration compartment 110 is kept at a constant low temperature.

[0083] Exemplarily, the box body 100 may include an outer shell 120, an inner liner 130 located in the outer shell 120, and a foaming layer filled between the outer shell 120 and the inner liner 130. The inner liner 130 may be configured with a refrigeration compartment 110 for accommodating food and other items. The refrigeration compartment 110 may have a take-in and take-out opening, and items may be taken in and put out of the refrigeration compartment 110 through the take-in and take-out opening. The door body 200 may be rotatably connected to the box body 100 by a hinge, so that the door body 200 may rotate relative to the box body 100, thereby opening or closing the take-in and take-out opening.

[0084] refer to Figure 2 The refrigeration system 300 of the refrigerator includes a compressor 310, a condenser 320, a throttle 330 and an evaporator 340 which are connected in a loop. The compressor 310 is used to compress the refrigerant vapor to generate high-temperature and high-pressure refrigerant vapor, and transport the refrigerant vapor to the condenser 320. The condenser 320 is used to liquefy the high-temperature and high-pressure refrigerant vapor to generate high-temperature and low-pressure refrigerant liquid, and transport the refrigerant liquid to the throttle 330. The throttle 330 reduces the pressure of the refrigerant liquid, so that the high-temperature and low-pressure refrigerant liquid is converted into a low-pressure and low-temperature refrigerant liquid, and the low-pressure and low-temperature refrigerant liquid is transported to the evaporator 340. After receiving the low-pressure and low-temperature refrigerant liquid, the evaporator 340 makes it boil under isobaric conditions, absorbs heat and vaporizes, so as to reduce the temperature in the refrigerator.

[0085] The refrigerator of the embodiment of the present application may further include a heating device, which is configured to melt the frost layer on the evaporator 340. Figure 3 and Figure 4 The heating device may include a conductive heating unit 500 and a radiant heating unit 400 connected in parallel. The evaporator 340 includes a main pipeline 341, and the conductive heating unit 500 is configured to defrost the main pipeline 341. The radiant heating unit 400 is configured to defrost the evaporator 340 from below the evaporator 340.

[0086] Exemplarily, the radiation heating unit 400 may include a voltage regulating module, a first switch and a radiation heater, wherein the first end of the voltage regulating module is connected to the control mainboard, the second end of the voltage regulating module is connected to the first end of the first switch, the second end of the first switch is connected to the first end of the conduction heater, and the second end of the conduction heater is connected to the control mainboard. The first switch has an open state and a closed state. When the first switch is in the open state, the radiation heater can be stopped, and when the first switch is in the closed state, the radiation heater can be in a working state. The voltage regulating module has a voltage adjustment function. By adjusting the voltage of the voltage regulating module, the voltage of the radiation heater can be adjusted, thereby adjusting the heating power of the radiation heater. The radiation heater mainly defrosts the main pipeline 341 and other components of the evaporator 340 by heat radiation. Exemplarily, the radiation heater can be arranged below the evaporator 340. The radiation heater can be a steel pipe heater.

[0087] Exemplarily, the radiation heating unit 400 further includes a first fuse, a first end of the first fuse is connected to a second end of the radiation heater, and a second end of the first fuse is connected to a control mainboard. The first fuse has an off state, and when the first fuse is in the off state, the radiation heater can stop working.

[0088] Exemplarily, the conduction heating unit 500 may include a second switch and a conduction heater, wherein the first end of the second switch is connected to the control mainboard, the second end of the second switch is connected to the first end of the conduction heater, and the second end of the conduction heater is connected to the control mainboard. The second switch has an open state and a closed state. When the second switch is in the open state, the conduction heater can be in a stopped state, and when the second switch is in the closed state, the radiation heater can be in a working state. The conduction heater mainly defrosts the main pipeline 341 by heat conduction. Exemplarily, the conduction heater can be arranged on the evaporator 340 and fit the main pipeline 341 to conduct the heat generated by the conduction heater to the main pipeline 341. The radiation heater can be an aluminum tube heater.

[0089] Exemplarily, the conductive heating unit 500 may further include a second fuse, a first end of the second fuse being connected to a second end of the conductive heater, and a second end of the second fuse being connected to the control mainboard. The second fuse has an off state, and when the second fuse is in the off state, the conductive heater may stop working.

[0090] The refrigerator of the embodiment of the present application further includes a first temperature measuring device, which is used to measure the temperature of the evaporator 340. Exemplarily, the first temperature measuring device may be a first temperature sensor, which may be installed on the evaporator 340 and located at the upper part of the evaporator 340.

[0091] The refrigerator of the embodiment of the present application may further include a second temperature measuring device, which is configured to measure the temperature of the radiant heater. Exemplarily, the second temperature measuring device may be a second temperature sensor, which may be installed on the radiant heater to measure the temperature of the radiant heater.

[0092] The refrigerator of the embodiment of the present application may further include a third temperature measuring device, which is used to measure the temperature of the conduction heater. For example, the third temperature measuring device may be a third temperature sensor, which may be installed on the conduction heater to measure the temperature of the conduction heater.

[0093] refer to Figure 5 The refrigerator of the embodiment of the present application also includes a control main board, which is connected to a first temperature measuring device and a heating device. The control main board is configured to: obtain the switching frequency of the door body 200 within a preset time period; determine the target heating unit according to the switching frequency; control the target heating unit to operate according to the target heating power so that the temperature of the evaporator 340 reaches a first preset temperature.

[0094] The refrigerator of the embodiment of the present application represents the frequency of use of the refrigerator by the user through the frequency of opening and closing of the door body 200 within a preset time period, determines the target heating unit and the target heating power in the heating device according to the opening and closing frequency, and controls the target heating unit to operate according to the target heating power to melt the frost layer on the evaporator 340, and can prevent overheating of the evaporator 340, thereby reducing the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reducing the energy consumption of the refrigerator and improving customer satisfaction.

[0095] The control mainboard may also be connected to a second temperature measuring device and a third temperature measuring device to obtain the temperature of the radiation heater and the temperature of the conduction heater.

[0096] The present application also provides a refrigerator control method for controlling the refrigerator. Figure 6 , the control method may include the following steps:

[0097] S100, obtaining the frequency of opening and closing of the door within a preset time period.

[0098] According to the user's usage habits, the frequency of opening and closing the door body 200 can be used to characterize the frequency of the user's use of the refrigerator. The higher the frequency of the user's use of the refrigerator, that is, the higher the frequency of the user's opening and closing of the door, the more frequent the heat and mass exchange between the refrigerator's refrigeration compartment 110 and the outside world and items such as food, and the more water vapor, the thicker the frost layer formed by the water vapor attached to the evaporator 340. The control mainboard can obtain the frequency of opening and closing the door body 200 within a preset time length. For example, the preset time length can be 24 hours. It is understandable that the preset time length can also be other time lengths, and the embodiments of the present application will not be repeated here.

[0099] S200, determining a target heating unit according to the switching frequency.

[0100] After obtaining the opening and closing frequency of the door body 200 within a preset time period, the opening and closing frequency can be judged to determine the frequency of the user using the refrigerator, thereby determining the target heating unit.

[0101] For example, reference Figure 7 The control method of the embodiment of the present application may further include the following steps:

[0102] S210: Determine whether the switching frequency is 0.

[0103] After the control mainboard obtains the switching frequency, it determines whether the switching frequency is 0. By determining whether the switching frequency is 0, it can be determined whether the user uses the refrigerator.

[0104] S220: If the switching frequency is 0, determine that the target heating unit is a radiation heating unit.

[0105] Due to the influence of the cold air flow direction of the refrigerator, the thickness of the frost layer in the area above the evaporator 340 is usually less than that in the area below. The area above the evaporator 340 is the main pipeline 341. If the switching frequency is 0, it is determined that the user is not using the refrigerator, and the frost layer on the evaporator 340 is thin and concentrated in the area below the evaporator 340. At this time, it is determined that the target heating unit is the radiation heating unit 400. Subsequently, the radiation heating unit 400 can be controlled to mainly defrost the area below the evaporator 340, and there is no need to control the conduction heating unit 500 to defrost the main pipeline 341 of the evaporator 340. Even if there is a frost layer on the main pipeline 341, it can be melted by the heat radiated by the radiation heating unit 400. Such a setting can reduce the energy consumption of the heating device, thereby reducing the incremental energy consumption of defrosting and reducing the energy consumption of the refrigerator.

[0106] For example, in some implementations of the embodiments of the present application, when the switching frequency is 0, the control mainboard may also obtain the temperature in the refrigeration compartment 110 of the cabinet 100, and determine whether the temperature in the refrigeration compartment 110 is within a preset refrigeration temperature range. If the temperature in the refrigeration compartment 110 is within the preset refrigeration temperature range, it is determined that the target heating unit is the radiation heating unit 400.

[0107] The preset refrigeration temperature range may be the temperature range in the refrigeration compartment 110 when there is no abnormality in the refrigerator, for example, when the door body 200 is not in an open state for a long time or when the refrigerator cold capacity is not leaked. If the temperature in the refrigeration compartment 110 is within the preset refrigeration temperature range, it is determined that there is no abnormality in the refrigerator refrigeration system 300, and the user can use the refrigerator normally. By judging the temperature in the refrigeration compartment 110, the situation when the refrigerator is abnormal can be excluded, thereby improving the accuracy of judging when the user is not using the refrigerator.

[0108] S230: If the switching frequency is not 0, determine that the target heating unit is a radiation heating unit and a conduction heating unit.

[0109] If the switching frequency is not 0, it is determined that the user is using the refrigerator, and the upper and lower areas of the evaporator 340 are both frosted, and the frost layer is relatively thick. At this time, the target heating unit is determined to be the radiation heating unit 400 and the conduction heating unit 500. Subsequently, the radiation heating unit 400 and the conduction heating unit 500 can be controlled to defrost the lower area of ​​the evaporator 340 and the upper area with the main pipe 341, thereby increasing the defrosting heat, enhancing the defrosting effect, and shortening the defrosting time, thereby reducing the defrosting energy consumption increment and reducing the energy consumption of the refrigerator.

[0110] S300, controlling the target heating unit to operate according to the target heating power so that the temperature of the evaporator reaches a first preset temperature.

[0111] After determining the target heating unit, the control main board may control the target heating unit to operate at the target heating power so that the target heating unit generates heat, thereby melting the frost layer on the evaporator 340 .

[0112] If the target heating unit is the radiation heating unit 400, the control mainboard can control the radiation heating unit 400 to work according to the first target heating power so that the temperature of the evaporator 340 reaches the first preset temperature. Exemplarily, the first target heating power can be 100W. The first preset temperature can be the temperature of the evaporator 340 when the frost layer is completely melted. When the temperature of the evaporator 340 reaches the first preset temperature, it can be determined that the frost layer on the evaporator 340 is completely melted. When the temperature of the evaporator 340 reaches the first preset temperature, the control mainboard can control the radiation heating unit 400 to stop working to prevent the evaporator 340 from being overheated and causing the temperature to be too high, thereby reducing the energy consumed during the recovery of the refrigerator to the refrigeration state, that is, reducing the energy consumption increment during the recovery period, thereby reducing the energy consumption of the refrigerator.

[0113] If the target heating unit is the radiation heating unit 400 and the conduction heating unit 500, refer to Figure 8 The control method of the embodiment of the present application may include the following steps:

[0114] S310, obtaining a preset corresponding relationship, where the preset corresponding relationship includes a plurality of switching frequency ranges, and a heating power corresponding to each switching frequency range.

[0115] After the control mainboard determines that the target heating unit is the radiation heating unit 400, a preset correspondence relationship can be obtained to determine the target heating power. The preset correspondence relationship may include multiple switching frequency ranges and the heating power corresponding to each switching frequency range.

[0116] Exemplarily, the preset corresponding relationship may be as shown in Table 1.

[0117] Table 1

[0118] Switching frequency range (times / 24h) Heating power(W) 1～8 120 9～30 140 >30 160

[0119] S320. Determine a second target heating power in a preset corresponding relationship according to the switching frequency, and the second target heating power is greater than the first target heating power.

[0120] Exemplarily, after the control mainboard obtains the preset switching frequency, the corresponding switching frequency range can be searched in the preset corresponding relationship, and the second target heating power can be determined according to the switching frequency range. The second target heating power can be greater than the first target heating power, so that the heat generated by the heating device is increased to melt the frost layer on the evaporator 340. For example, if the switching frequency of the door body 200 is 12 times / 24h, the second target heating power is determined to be 140W. Through the preset corresponding relationship, the second target heating power can be conveniently determined according to the switching frequency range. Different switching frequency ranges correspond to different heating powers, so as to make targeted adjustments to the target heating power according to the thickness of the frost layer on the evaporator 340, prevent overheating of the evaporator 340, reduce the incremental energy consumption during the defrosting period and the incremental energy consumption during the recovery period, reduce the energy consumption of the refrigerator, and improve customer satisfaction.

[0121] S330, controlling the conductive heating unit to operate at a preset power that is less than the second target heating power, and controlling the radiant heating unit to operate at the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

[0122] For example, the control mainboard can control the conduction heating unit 500 to work according to a preset power, which can be less than the second target heating power, and control the radiation heating unit 400 to work according to the second target heating power. In this way, the heating power of the conduction heating unit 500 can be less than the heating power of the radiation heating unit 400, so that the heat of the upper area of ​​the evaporator 340 is less than the heat of the lower area, so as to prevent the conduction heating unit 500 from overheating the main pipe 341 of the evaporator 340, protect the main pipe 341 of the evaporator 340, and melt the frost layer on the main pipe 341 to ensure the defrosting effect of the evaporator 340.

[0123] For example, reference Fig. 9 The control method of the embodiment of the present application may further include the following steps:

[0124] S331. Obtain the temperature of the evaporator.

[0125] The control mainboard can also obtain the temperature of the evaporator 340 while controlling the operation of the conduction heating unit 500 and the radiation heating unit 400 .

[0126] S332: Determine whether the temperature of the evaporator reaches a second preset temperature, and the second preset temperature is lower than the first preset temperature.

[0127] The second preset temperature is lower than the first preset temperature. The second preset temperature may refer to the temperature at which the frost layer on the main pipe 341 of the evaporator 340 melts or substantially melts. The control main board determines whether the temperature of the evaporator 340 reaches the second preset temperature, and can determine whether the frost layer on the main pipe 341 of the evaporator 340 melts or substantially melts.

[0128] S333: If the temperature of the evaporator reaches the second preset temperature, the conductive heating unit is controlled to stop working, and the radiant heating unit is controlled to continue working according to the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

[0129] If the temperature of the evaporator 340 reaches the second preset temperature, it can be determined that the frost layer of the main pipe 341 of the evaporator 340 has melted or is substantially melted, and the controller controls the conductive heating unit 500 to stop working, and controls the radiant heating unit 400 to continue working according to the second target heating power, so as to melt the frost layer on other parts of the evaporator 340 and the remaining frost layer on the main pipe 341, until the temperature of the evaporator 340 reaches the first preset temperature, that is, the frost layer on the evaporator 340 is completely melted. Such a setting can prevent the main pipe 341 from being overheated while ensuring the defrosting effect of the evaporator 340, play a role in protecting the main pipe 341, and reduce the energy consumption of the conductive heating unit 500, reduce the incremental energy consumption of defrosting, and reduce the energy consumption of the refrigerator.

[0130] For example, in an embodiment of the present application, if the target heating unit includes a radiation heating unit 400, the control mainboard can control the first switch to be in a closed state so that the radiation heater is connected to the control mainboard. The control mainboard can have a power supply module to provide voltage and current to the radiation heater so that the radiation heater can work to generate heat. The control mainboard can adjust the voltage of the voltage regulating module to make the radiation heater work according to the target heating power, for example, according to the first target heating power. For example, the first switch can be a relay.

[0131] If the target heating unit includes a conductive heating unit 500, the control mainboard can control the second switch to be in a closed state so that the conductive heater is connected to the control mainboard. The control mainboard can have a power module to provide voltage and current to the conductive heater so that the conductive heater can work to generate heat. Exemplarily, the second switch can be a relay.

[0132] Exemplarily, the control mainboard can also obtain the temperature of the radiation heater in the process of controlling the operation of the radiation heating unit 400 and the conduction heating unit 500. If the temperature of the radiation heater exceeds the first preset fuse temperature, it is determined that the radiation heater is overheated, and the first fuse is controlled to be disconnected to stop the radiation heater from working. If the temperature of the radiation heater does not exceed the first preset fuse temperature, the radiation heater is controlled to continue working. In this way, the radiation heater can be protected from overheating and safety hazards can be reduced.

[0133] The control mainboard can also obtain the temperature of the conduction heater. If the temperature of the conduction heater exceeds the second preset fuse temperature, it is determined that the conduction heater is overheated, and the second fuse is controlled to disconnect to stop the conduction heater from working. If the temperature of the conduction heater does not exceed the second preset fuse temperature, the conduction heater is controlled to continue working. In this way, the conduction heater can be protected from overheating and safety hazards can be reduced.

[0134] In addition, since the radiation heating unit 400 and the conduction heating unit 500 are connected in parallel, when the first fuse is disconnected and the radiation heater stops working, the conduction heater can still work; when the second fuse is disconnected and the conduction heater stops working, the radiation heater can still work. With such a configuration, when the radiation heater or the conduction heater fails, the heating device can still provide heat for defrosting, thereby ensuring the normal use of the refrigerator and improving the user experience before the fault is repaired.

[0135] refer to Fig.10 , Fig.11 , Fig.12 and Fig.13 In some possible implementations of the embodiments of the present application, a refrigerator control method is also provided, which may include the following steps:

[0136] S410, obtaining the frequency of opening and closing of the door within 24 hours.

[0137] S420: The switching frequency is 0, and the temperature of the refrigeration compartment reaches the preset refrigeration temperature, and it is determined that there is no door opening action.

[0138] S430, controlling the first switch to close, and the radiation heater to operate.

[0139] S440, adjusting the voltage of the voltage regulating module so that the radiation heater operates at a power of W1.

[0140] S450, determine whether the evaporator temperature is greater than a first preset temperature; if not, execute step S440; if yes, execute step S460.

[0141] S460, control the first switch to open, and the radiation heater stops working.

[0142] S510: The frequency of door opening and closing is 1 to 8 times, which is determined to be normal door opening and closing.

[0143] S520, controlling the first switch and the second switch to be closed, so that the radiation heater and the conduction heater are operated.

[0144] S530, adjusting the voltage of the voltage regulating module so that the radiation heater operates at a power of W2.

[0145] S540: Determine whether the evaporator temperature is greater than a second preset temperature.

[0146] S550, control the second switch to open, the conduction heater stops working, and the radiation heater continues to work at power W2.

[0147] S560, determine whether the evaporator temperature is greater than the first preset temperature; if not, execute step S550; if yes, execute step S570.

[0148] S570, control the first switch to open, and the radiation heater stops working.

[0149] S610: The frequency of door opening and closing is 9 to 30 times, which is determined as frequent door opening and closing.

[0150] S620, controlling the first switch and the second switch to be closed, so that the radiation heater and the conduction heater work.

[0151] S630, adjusting the voltage of the voltage regulating module so that the radiation heater operates at a power of W3.

[0152] S640: Determine whether the evaporator temperature is greater than a second preset temperature.

[0153] S650, control the second switch to open, the conduction heater stops working, and the radiation heater continues to work at power W3.

[0154] S660, determine whether the evaporator temperature is greater than the first preset temperature; if not, execute step S650; if yes, execute step S670.

[0155] S670, control the first switch to open, and the radiation heater stops working.

[0156] S710: The frequency of door opening and closing is >30 times, which is judged as heavy door opening and closing.

[0157] S720, control the first switch and the second switch to be closed, and the radiation heater and the conduction heater to operate.

[0158] S730, adjusting the voltage of the voltage regulating module so that the radiation heater operates at a power of W4.

[0159] S740: Determine whether the evaporator temperature is greater than a second preset temperature.

[0160] S750, control the second switch to open, the conduction heater stops working, and the radiation heater continues to work at power W4.

[0161] S760, determine whether the evaporator temperature is greater than the first preset temperature; if not, execute step S750; if yes, execute step S770.

[0162] S770, control the first switch to open, and the radiation heater stops working.

[0163] In some other possible implementations of the present application, a refrigerator control method is also provided. Fig.14 , which may include the following steps:

[0164] S810: Obtain the temperature of the radiation heater.

[0165] S820, determining whether the temperature of the radiation heater is greater than a first preset fuse temperature; if not, executing step 830; if yes, executing step 840.

[0166] S830, the radiation heater continues to work.

[0167] S840, controlling the first fuse to disconnect, and the radiation heater to stop working.

[0168] S850, the conduction heater continues to work and enters the protection program.

[0169] S860, determine whether the temperature of the evaporator is greater than the first preset temperature; if not, execute step S850; if yes, execute step S870.

[0170] S870, the conduction heater stops working.

[0171] In some other possible implementations of the present application, a refrigerator control method is also provided. Fig.15 , which may include the following steps:

[0172] S910: Obtain the temperature of the conduction heater.

[0173] S920 , determining whether the temperature of the conductive heater is greater than a second preset fuse temperature; if not, executing step 930 ; if yes, executing step 940 .

[0174] S930, the conduction heater continues to work.

[0175] S940, controlling the second fuse to disconnect, and the conductive heater to stop working.

[0176] S950, the radiation heater continues to work and enters the protection program.

[0177] S960, determine whether the temperature of the evaporator is greater than the first preset temperature; if not, execute step S950; if yes, execute step S970.

[0178] S970, the radiation heater stops working.

[0179] For the detailed description of the above steps, please refer to other parts of the embodiments of the present application, which will not be repeated here.

[0180] The embodiments of the present application also provide a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores program instructions, and the program instructions are used for the methods in the above embodiments.

[0181] The embodiment of the present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one control module of the display device can read the execution instruction from the readable storage medium, and at least one control module executes the execution instruction so that the display device implements the handwriting erasing method provided by the various embodiments described above.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0183] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: include: A box body is constructed with a refrigeration compartment having a take-in and put-out opening; A door body, which is configured to open or close the access opening; A refrigeration system, which is configured to provide cold air to the refrigeration room, the refrigeration system comprising a compressor, a condenser, a throttle and an evaporator which are cyclically connected in sequence, and the evaporator comprises a main pipeline; a first temperature measuring device configured to measure the temperature of the evaporator; A heating device, comprising a conduction heating unit and a radiation heating unit connected in parallel, wherein the conduction heating unit is configured to defrost the main pipeline, and the radiation heating unit is configured to defrost the evaporator from below the evaporator; A control mainboard, the control mainboard is connected to the temperature measuring device and the heating device, and the control mainboard is configured as follows: Obtaining the frequency of opening and closing of the door within a preset time period; Determining a target heating unit according to the switching frequency; The target heating unit is controlled to operate according to the target heating power so that the temperature of the evaporator reaches a first preset temperature.

2. The refrigerator according to claim 1, characterized in that: The control mainboard is configured as follows: Determine whether the switching frequency is 0; If the switching frequency is 0, determining that the target heating unit is the radiation heating unit; If the switching frequency is not 0, it is determined that the target heating unit is the radiation heating unit and the conduction heating unit.

3. The refrigerator according to claim 2, characterized in that: If the target heating unit is the radiation heating unit, the control mainboard is configured as follows: The radiation heating unit is controlled to operate according to a first target heating power so that the temperature of the evaporator reaches a first preset temperature.

4. The refrigerator according to claim 2, characterized in that: If the target heating unit is the radiation heating unit and the conduction heating unit, the control mainboard is configured as follows: Acquire a preset corresponding relationship, wherein the preset corresponding relationship includes a plurality of switching frequency ranges, and a heating power corresponding to each of the switching frequency ranges; According to the switching frequency, determining a second target heating power in the preset corresponding relationship, the second target heating power being greater than the first target heating power; The conductive heating unit is controlled to operate at a preset power that is less than the second target heating power, and the radiant heating unit is controlled to operate at the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

5. The refrigerator according to claim 4, characterized in that: The control mainboard is configured as follows: obtaining the temperature of the evaporator; determining whether the temperature of the evaporator reaches a second preset temperature, the second preset temperature being lower than the first preset temperature; If the temperature of the evaporator reaches the second preset temperature, the conductive heating unit is controlled to stop working, and the radiant heating unit is controlled to continue working according to the second target heating power, so that the temperature of the evaporator reaches the first preset temperature.

6. The refrigerator according to any one of claims 1 to 5, characterized in that: The radiation heating unit comprises a voltage regulating module, a first switch and a radiation heater, wherein a first end of the voltage regulating module is connected to the control mainboard, a second end of the voltage regulating module is connected to a first end of the first switch, a second end of the first switch is connected to a first end of the radiation heater, and a second end of the radiation heater is connected to the control mainboard; The control mainboard is configured as follows: If the target heating unit includes the radiation heating unit, the first switch is controlled to be in a closed state, and the voltage of the voltage regulating module is adjusted so that the radiation heater operates according to the target heating power.

7. The refrigerator according to claim 6, characterized in that: The radiation heating unit further includes a first fuse, a first end of the first fuse is connected to a second end of the radiation heater, and a second end of the first fuse is connected to the control mainboard; The refrigerator further includes a second temperature measuring device configured to measure a temperature of the radiant heater; The control mainboard is configured as follows: obtaining a temperature of the radiation heater; If the temperature of the radiation heater exceeds a first preset fuse temperature, the first fuse is controlled to be disconnected.

8. The refrigerator according to any one of claims 1 to 5, characterized in that: The conduction heating unit comprises a second switch and a conduction heater, wherein a first end of the second switch is connected to the control main board, a second end of the second switch is connected to a first end of the conduction heater, and a second end of the conduction heater is connected to the control main board; The control mainboard is configured as follows: If the target heating unit comprises a conductive heating unit, the second switch is controlled to be closed to operate the conductive heater.

9. The refrigerator according to claim 8, characterized in that: The conductive heating unit further includes a second fuse, a first end of the second fuse is connected to a second end of the conductive heater, and a second end of the second fuse is connected to the control mainboard; The refrigerator further includes a third temperature measuring device configured to measure a temperature of the conductive heater; The control mainboard is configured as follows: obtaining a temperature of the conduction heater; If the temperature of the conductive heater exceeds a second preset fuse temperature, the second fuse is controlled to be disconnected.

10. A method for controlling a refrigerator, characterized in that: The refrigerator comprises: A box body is constructed with a refrigeration compartment having a take-in and put-out opening; A door body, which is configured to open or close the access opening; A refrigeration system, which is configured to provide cold air to the refrigeration room, the refrigeration system comprising a compressor, a condenser, a throttle and an evaporator which are cyclically connected in sequence, and the evaporator comprises a main pipeline; a first temperature measuring device configured to measure the temperature of the evaporator; A heating device, comprising a conduction heating unit and a radiation heating unit connected in parallel, wherein the conduction heating unit is configured to defrost the main pipeline, and the radiation heating unit is configured to defrost the evaporator; The control method comprises: Obtaining the frequency of opening and closing of the door within a preset time period; Determining a target heating unit according to the switching frequency; The target heating unit is controlled to operate according to the target heating power so that the temperature of the evaporator reaches a first preset temperature.

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