Charging control method of solar-driven photovoltaic refrigerator and refrigerator thereof

Abstract

The invention provides a charging control method for a solar-driven photovoltaic refrigerator and the refrigerator thereof.The method comprises the steps that electric energy information of the solar-driven photovoltaic refrigerator is obtained, and whether photovoltaic output power is larger than a first preset value or not is judged according to the electric energy information; when the photovoltaic output power is greater than a first preset value, judging whether the refrigerator is connected to the mains supply or not; when the refrigerator is connected to commercial power and the commercial power is valley power, the refrigerator is switched from a photovoltaic power supply mode to a commercial power supply mode, and a storage battery of the solar-driven photovoltaic refrigerator is charged; whether the storage battery is in an overcharge state or not is judged through the storage battery detection circuit, and if the storage battery is in the overcharge state, charging of the storage battery is stopped. The refrigerator is provided with an energy storage system, such as a storage battery, which is used for storing redundant electric energy when illumination is sufficient so as to supply power to the refrigerator when the illumination is insufficient or the power grid load is off-peak at night, and the energy storage mechanism further enhances the independence and stability of the system and prolongs the service life of the refrigerator.

Description

Technical Field

[0001] The present application relates to the field of solar energy application and household appliance technology, and in particular to a charging control method for a solar-driven photovoltaic refrigerator and the refrigerator. Background Art

[0002] With the consumption of non-renewable energy such as oil, coal, and natural gas, environmental problems and energy shortages are becoming increasingly severe. People are gradually turning their attention to the use of renewable energy such as wind energy, hydropower, biomass energy, and solar energy. Solar refrigerators, a new type of refrigeration equipment, are gradually coming into people's view. Solar photovoltaic refrigerators use solar energy as the power source of the system, which is clean and pollution-free, reduces the use of electricity, and helps solve the increasingly serious energy crisis caused by the depletion of non-renewable energy.

[0003] Solar photovoltaic refrigerators are developed based on traditional compression refrigerators. They are mainly composed of solar panels, controllers, batteries and refrigerators. The solar panels are located on the top or sun-exposed side of the refrigerator and are connected to the controller through wires. The controller is connected to the hot end of the semiconductor refrigeration device, and the cold end is directly connected to the inside of the refrigerator. The battery is connected between the controller and the solar battery array to store electrical energy. Solar refrigerators mainly work on the basic principles of photovoltaic effect and semiconductors. The photovoltaic effect refers to the absorption of light energy and conversion of light energy into electrical energy when light shines on the surface of a material. The semiconductor refrigeration device uses the thermoelectric effect of semiconductor materials to achieve energy conversion between hot and cold ends. Specifically, the solar panels convert the absorbed solar energy into electrical energy, which is distributed to the semiconductor refrigeration device and the battery through the controller. The semiconductor refrigeration device uses electric current to generate thermoelectric effect to achieve energy conversion between hot and cold ends. The hot end discharges heat to the outside of the refrigerator through the radiator, and the cold end introduces cold air into the refrigerator through the pipe to achieve the cooling effect.

[0004] However, the battery control technology in the current solar photovoltaic refrigerator still has defects. The battery is in a charging state for a long time, which will cause damage to the battery components and reduce the service life of the battery, thereby reducing the service life of the solar photovoltaic refrigerator. Summary of the invention

[0005] The present application provides a charging control method for a solar-driven photovoltaic refrigerator and the refrigerator thereof, so as to solve the problem that the battery control technology in the existing ice solar photovoltaic refrigerator still has defects. The battery is in a charging state for a long time, which will cause damage to the battery components and reduce the service life of the battery, thereby reducing the service life of the solar photovoltaic refrigerator.

[0006] In a first aspect, the present application provides a charging control method for a solar-driven photovoltaic refrigerator, the method comprising:

[0007] Acquiring power information of a solar-driven photovoltaic refrigerator, and determining whether the photovoltaic output power is greater than a first preset value according to the power information;

[0008] When the photovoltaic output power is greater than a first preset value, determining whether the refrigerator is connected to the mains;

[0009] When the refrigerator is connected to the mains and the mains is off-peak, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode, and the storage battery of the solar-driven photovoltaic refrigerator is charged;

[0010] The battery detection circuit is used to determine whether the battery is in an overcharged state. If the battery is in an overcharged state, charging of the battery is stopped.

[0011] In some possible implementations, the method further includes:

[0012] When the refrigerator is not connected to the mains, starting the photovoltaic power supply mode, and monitoring the photovoltaic output power in real time;

[0013] When the photovoltaic output power is greater than the power used by the user, charging the storage battery;

[0014] When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state;

[0015] If it is not in the overcharge state, the battery is charged.

[0016] In some possible implementations, the method further includes:

[0017] When the refrigerator is connected to the mains and the mains is at peak power, a photovoltaic power supply mode is started, and photovoltaic output power and user power are obtained;

[0018] When the photovoltaic output power is greater than the power used by the user, charging the storage battery;

[0019] When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state;

[0020] If it is in an overcharge state, the charging mode of the battery is turned off.

[0021] In some possible implementations, the method further includes:

[0022] When the photovoltaic output power is less than or equal to a first preset value, determining whether the battery is in an overcharge state through a battery detection circuit, and if it is in an overcharge state, stopping charging the battery;

[0023] If it is not in the overcharge state, the battery is charged.

[0024] In some possible implementations, the method further includes:

[0025] After the refrigerator is started, if the photovoltaic power supply mode is turned on and the refrigerator is connected to the network, the weather conditions and light intensity of the current city are obtained in real time through the network; the weather conditions include sunny, cloudy, overcast and rainy and snowy; the light intensity includes low level, suitable level and high level;

[0026] Determine whether the photovoltaic power supply mode conditions are met according to the weather conditions and light intensity;

[0027] When the photovoltaic power supply mode condition is not met, the refrigerator is powered by an AC circuit between the battery and the mains.

[0028] In some possible implementations, when the charging condition is not met, powering the refrigerator through an AC circuit between the storage battery and the mains power includes:

[0029] Obtaining the battery power information and the maximum power output of the battery;

[0030] When the power level of the storage battery is less than a second preset value, determining whether the maximum power output by the storage battery is less than or equal to the power used by the user;

[0031] If not, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode.

[0032] In a second aspect, the present application provides a refrigerator, comprising:

[0033] Control device, inverter device, display device, solar battery assembly and battery;

[0034] The control device is used to control the inverter device, the display device and the solar battery assembly; the control device is configured to execute the charging control method of the solar-driven photovoltaic refrigerator according to any one of the first aspects;

[0035] The display device is used to display a user interface;

[0036] The inverter device is used to invert the direct current output by the solar battery assembly or battery into alternating current;

[0037] The solar cell assembly is used to receive solar radiation and convert it into direct current electrical energy.

[0038] In some possible implementations, the solar battery assembly is a parallel distributed photovoltaic converter structure, and the parallel distributed photovoltaic converter structure includes a photovoltaic array, a converter, and a photovoltaic detection circuit.

[0039] In some possible implementations, the inverter device includes a full-bridge inverter circuit and a push-to-boost circuit.

[0040] In some possible implementations, the control device includes a communication module, a serial port driver, a control circuit, and a battery detection circuit.

[0041] As can be seen from the above, the present application provides a charging control method for a solar-driven photovoltaic refrigerator and a refrigerator thereof, the method comprising obtaining the electric energy information of the solar-driven photovoltaic refrigerator, and judging whether the photovoltaic output power is greater than a first preset value according to the electric energy information; judging whether the refrigerator is connected to the mains when the photovoltaic output power is greater than the first preset value; switching the refrigerator from the photovoltaic power supply mode to the mains power supply mode when the refrigerator is connected to the mains and the mains is valley power, and charging the battery of the solar-driven photovoltaic refrigerator; judging whether the battery is in an overcharged state by a battery detection circuit, and if it is in an overcharged state, stopping charging the battery. The solar photovoltaic refrigerator directly absorbs solar energy through photovoltaic panels and converts it into electric energy for the refrigerator. During the valley power period, that is, the period when the load of the power grid is low, the demand for electricity is reduced and the electricity price is relatively low, but the solar photovoltaic refrigerator can still provide stable power supply and does not rely on the power supply of the power grid. The refrigerator is also equipped with an energy storage system, such as a battery, which is used to store excess electricity when there is sufficient sunlight, so as to power the refrigerator during periods of low grid load such as insufficient sunlight or at night. This energy storage mechanism further enhances the independence and stability of the system and extends the service life of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] Figure 1 A flow chart of a charging control method for a solar-driven photovoltaic refrigerator provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the refrigerator structure provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the structure of a solar cell assembly in a refrigerator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0047] With the consumption of non-renewable energy such as oil, coal, and natural gas, environmental problems and energy shortages are becoming increasingly severe. People are gradually turning their attention to the use of renewable energy such as wind energy, hydropower, biomass energy, and solar energy. Solar refrigerators, a new type of refrigeration equipment, are gradually coming into people's view. Solar photovoltaic refrigerators use solar energy as the power source of the system, which is clean and pollution-free, reduces the use of electricity, and helps solve the increasingly serious energy crisis caused by the depletion of non-renewable energy.

[0048] Solar photovoltaic refrigerators are developed based on traditional compression refrigerators. They are mainly composed of solar panels, controllers, batteries and refrigerators. The solar panels are located on the top or sun-exposed side of the refrigerator and are connected to the controller through wires. The controller is connected to the hot end of the semiconductor refrigeration device, and the cold end is directly connected to the inside of the refrigerator. The battery is connected between the controller and the solar battery array to store electrical energy. Solar refrigerators mainly work on the basic principles of photovoltaic effect and semiconductors. The photovoltaic effect refers to the absorption of light energy and conversion of light energy into electrical energy when light shines on the surface of a material. The semiconductor refrigeration device uses the thermoelectric effect of semiconductor materials to achieve energy conversion between hot and cold ends. Specifically, the solar panels convert the absorbed solar energy into electrical energy, which is distributed to the semiconductor refrigeration device and the battery through the controller. The semiconductor refrigeration device uses electric current to generate thermoelectric effect to achieve energy conversion between hot and cold ends. The hot end discharges heat to the outside of the refrigerator through the radiator, and the cold end introduces cold air into the refrigerator through the pipe to achieve the cooling effect.

[0049] The traditional photovoltaic refrigerator system consists of battery components, controllers, batteries, inverters and refrigerators. At present, the practical application of solar photovoltaic refrigerators is still relatively low. The main limiting factors are that the system is greatly affected by weather conditions and it is difficult to achieve stable operation in continuous rainy weather; the initial investment of system components such as batteries is high. In order to store the power required for the system to run for a period of time, a larger battery capacity is required, which will greatly increase the initial investment cost of the system. The refrigerator is an inductive load and requires 6-10 units of instantaneous starting power at the moment of starting. For photovoltaic refrigerators without variable frequency starting, a larger inverter capacity is required, which will also increase the investment cost of the system. Frequent starting power will damage components and reduce the service life of the inverter.

[0050] However, the battery control technology in the current solar photovoltaic refrigerator still has defects. The battery is in a charging state for a long time, which will cause damage to the battery components and reduce the service life of the battery, thereby reducing the service life of the solar photovoltaic refrigerator.

[0051] Based on this, the present application provides a charging control method for a solar-driven photovoltaic refrigerator and a refrigerator thereof. The solar photovoltaic refrigerator directly absorbs solar energy through photovoltaic panels and converts it into electrical energy for the refrigerator to use. During the off-peak period, that is, the period when the load on the power grid is low, the demand for electricity is reduced and the electricity price is relatively low, but the solar photovoltaic refrigerator can still provide stable power supply and is not dependent on the power supply of the power grid. Some solar photovoltaic refrigerators are also equipped with energy storage systems, such as batteries, which are used to store excess electricity when there is sufficient sunlight, so as to power the refrigerator during low-load periods of the power grid such as insufficient sunlight or at night. This energy storage mechanism further enhances the independence and stability of the system.

[0052] like Figure 1 As shown, some embodiments of the present application provide a charging control method for a solar-driven photovoltaic refrigerator, the method comprising:

[0053] Acquiring power information of a solar-driven photovoltaic refrigerator, and determining whether the photovoltaic output power is greater than a first preset value according to the power information;

[0054] When the photovoltaic output power is greater than a first preset value, determining whether the refrigerator is connected to the mains; wherein the first preset value is 0;

[0055] When the refrigerator is connected to the mains and the mains is off-peak, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode, and the storage battery of the solar-driven photovoltaic refrigerator is charged;

[0056] The battery detection circuit is used to determine whether the battery is in an overcharged state. If the battery is in an overcharged state, charging of the battery is stopped.

[0057] Solar photovoltaic refrigerators absorb solar energy directly through photovoltaic panels and convert it into electricity for refrigerator use. During off-peak periods, when the grid load is low, the demand for electricity is reduced and the electricity price is relatively low, but solar photovoltaic refrigerators can still provide stable power supply and are not dependent on the power supply of the grid.

[0058] In some embodiments, the method further comprises:

[0059] When the refrigerator is not connected to the mains, starting the photovoltaic power supply mode, and monitoring the photovoltaic output power in real time;

[0060] When the photovoltaic output power is greater than the power used by the user, charging the storage battery;

[0061] When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state;

[0062] If it is not in an overcharge state, the battery is charged.

[0063] The present invention directly uses light energy to convert electrical energy to supply power directly, and the excess electrical energy enters the battery, and the city electricity is used to supplement the power when the power is insufficient. The solar photovoltaic refrigerator is also equipped with an energy storage system, such as a battery, which is used to store excess electrical energy when there is sufficient light, so as to power the refrigerator during periods of low load of the power grid such as insufficient light or at night. This energy storage mechanism further enhances the independence and stability of the system.

[0064] In some embodiments, the method further comprises:

[0065] When the refrigerator is connected to the mains and the mains is at peak power, a photovoltaic power supply mode is started, and photovoltaic output power and user power are obtained;

[0066] When the photovoltaic output power is greater than the power used by the user, charging the storage battery;

[0067] When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state;

[0068] If the battery is in an overcharge state, shutting down the charging mode of the battery;

[0069] If it is not in an overcharge state, the battery is adjusted to a battery discharge mode.

[0070] The control strategy of the solar photovoltaic refrigerator includes an intelligent adjustment function, which can automatically adjust the output power of the photovoltaic panel and the cooling power of the refrigerator according to real-time data such as light intensity, internal temperature of the refrigerator and grid load to maximize energy utilization.

[0071] Although solar photovoltaic refrigerators mainly rely on solar power and are not directly affected by peak and valley electricity prices, their intelligent control strategies can further optimize energy utilization. For example, during peak load periods of the power grid, the system can give priority to using the electricity in the energy storage system, reducing the need to purchase electricity from the power grid and indirectly reducing electricity costs. This approach can reduce the operating load of the power grid and improve the stability of the power grid.

[0072] In some embodiments, the method further comprises:

[0073] When the photovoltaic output power is less than or equal to a first preset value, determining whether the battery is in an overcharge state through a battery detection circuit, and if it is in an overcharge state, stopping charging the battery;

[0074] If it is not in an overcharge state, the battery is charged.

[0075] Solar photovoltaic panels use efficient photoelectric conversion technology to continuously improve the efficiency of converting solar energy into electrical energy. At the same time, the refrigeration system inside the photovoltaic refrigerator has also been optimized to ensure that energy consumption is minimized during the refrigeration process.

[0076] In some embodiments, the method further comprises:

[0077] After the refrigerator is started, if the photovoltaic power supply mode is turned on and the refrigerator is connected to the network, the weather conditions and light intensity of the current city are obtained in real time through the network; the weather conditions include sunny, cloudy, overcast and rainy and snowy; the light intensity includes low level, suitable level and high level;

[0078] Determine whether the photovoltaic power supply mode conditions are met according to the weather conditions and light intensity;

[0079] When the photovoltaic power supply mode condition is not met, the refrigerator is powered by an AC circuit between the battery and the mains.

[0080] The refrigerator of the present application can obtain the weather conditions of the current city in real time through the current network application. The current city can be set by the user in advance, or it can be automatically located by the positioning system. The network time can also be synchronized by connecting to the network. The weather conditions obtained are divided into the following four categories: clear, cloudy, overcast, rain (snow).

[0081] In some embodiments, the conditions for not meeting the photovoltaic power supply mode are when the weather is cloudy or rainy (snowy), and / or when the light intensity is low. At this time, the refrigerator is powered by the AC circuit between the battery and the mains.

[0082] Wherein, when the charging condition is not met, supplying power to the refrigerator through an AC circuit between the battery and the mains power includes:

[0083] Obtaining the battery power information and the maximum power output of the battery;

[0084] When the power level of the storage battery is less than a second preset value, determining whether the maximum power output by the storage battery is less than or equal to the power used by the user;

[0085] If not, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode.

[0086] This application fully considers the intermittent and instability of solar energy through a supporting control strategy, optimizes the distribution and utilization of energy through an intelligent algorithm, ensures that the refrigerator can operate efficiently when there is sufficient light, and maintains stable operation through energy storage devices when there is insufficient light or at night, thereby maximizing the utilization of energy and efficient operation of the system.

[0087] like Figure 2 As shown, in some embodiments, the present application provides a refrigerator, the refrigerator comprising:

[0088] Control device, inverter device, display device, solar battery assembly and battery;

[0089] The control device is used to control the inverter device, the display device and the solar battery assembly; the control device is configured to execute the charging control method of the solar-driven photovoltaic refrigerator of the above embodiment;

[0090] The display device is used to display a user interface;

[0091] The inverter device is used to invert the direct current output by the solar battery assembly or battery into alternating current;

[0092] The solar cell assembly is used to receive solar radiation and convert it into direct current electrical energy.

[0093] Wherein, the solar battery assembly is a parallel distributed photovoltaic converter structure, and the parallel distributed photovoltaic converter structure includes a photovoltaic array, a converter and a photovoltaic detection circuit.

[0094] like Figure 3 As shown, in order to improve the utilization rate of photovoltaic solar panels and avoid the coupling between solar panels affecting the output power of photovoltaic power generation modules, the present application designs and adopts a parallel distributed photovoltaic converter structure to achieve different output power levels.

[0095] The control device is used to control the working status of the entire refrigerator, including power on, power off, working mode switching, etc., and provide overcharge protection and over-discharge protection for the battery to ensure safe and stable operation of the system.

[0096] The battery is used to store excess electrical energy when the refrigerator is running, and to power the refrigeration system at night or on rainy days, thereby shifting energy peaks and filling valleys and improving the system's self-sufficiency.

[0097] Wherein, the inverter device includes a full-bridge inverter circuit and a push-pull boost circuit.

[0098] Wherein, the control device includes a communication module, a serial port driver, a control circuit and a battery detection circuit.

[0099] In addition to the above-mentioned contents, the refrigerator in the present application also includes components of commercially available AC refrigerators. As the main part of the refrigeration system, it works normally through the AC power provided by the inverter device to meet the user's refrigeration and freezing needs.

[0100] In some embodiments, in order to simplify the system structure, the control device and the inverter device can be integrated into one to form a compact control inverter unit, which is easy to install and maintain. The integration of the control device and the inverter device simplifies the system structure, reduces the manufacturing cost, and improves the reliability and maintenance convenience of the system.

[0101] The introduction of batteries realizes energy peak shifting and valley filling, improves the system's self-sufficiency, and reduces dependence on traditional power grids.

[0102] Solar photovoltaic panels use efficient photoelectric conversion technology to continuously improve the efficiency of converting solar energy into electrical energy. At the same time, the refrigeration system inside the photovoltaic refrigerator has also been optimized to ensure that energy consumption is minimized during the refrigeration process.

[0103] The core components of solar photovoltaic refrigerators, such as photovoltaic panels, batteries and refrigeration systems, have high reliability and durability, can operate stably for a long time, and reduce maintenance and replacement costs. Solar photovoltaic refrigerators use clean energy solar power to reduce dependence on traditional fossil energy and carbon emissions, which is beneficial to environmental protection and sustainable development.

[0104] The present invention realizes the conversion of solar energy into alternating current by integrating a solar cell assembly, a control device, an inverter device, a storage battery and a commercially available alternating current refrigerator, drives the commercially available alternating current refrigerator to work normally, and improves the compatibility and practicality of the system.

[0105] The working principle of the refrigerator provided by the present invention is as follows:

[0106] Step 1: Initialize the solar-based photovoltaic AC refrigerator system and determine whether the refrigerator is turned on?

[0107] Step 2: After the refrigerator cabinet is turned on, detect the power information and determine whether the photovoltaic output power P1 is greater than 0.

[0108] Step 3.1: If the photovoltaic output power P1 is less than 0, the system determines whether the system is in over-discharge through the battery detection circuit. If it is in over-discharge state, the charging mode is turned off; if it is not in over-discharge state, the battery charging mode is entered.

[0109] Step 3.2: If the photovoltaic output power P1 is greater than 0, the system determines whether to connect to the mains.

[0110] Step 3.2.1: If there is no mains power supply, the system will enter the photovoltaic power supply mode. If the photovoltaic output power value P1 is greater than the user power P2, the system will enter the battery charging mode. If the photovoltaic output power value P1 is less than the user power P2, the battery detection circuit will be used to determine whether the battery is over-discharged. If the battery is over-discharged, the charging mode will be turned off. If the battery is not over-discharged, the system will enter the battery charging mode.

[0111] Step 3.2.2: If the AC power is connected, determine whether it is valley power. If not, proceed with step 3.2.1 and enter the photovoltaic power supply mode. If it is valley power, start the AC power supply mode and enter the battery charging mode. Determine whether it is overcharged through the battery detection circuit. If so, turn off the charging mode. If not, the battery enters the discharge mode.

[0112] As can be seen from the above embodiments, the present application provides a charging control method for a solar-driven photovoltaic refrigerator and a refrigerator thereof, the method comprising obtaining the electric energy information of the solar-driven photovoltaic refrigerator, and judging whether the photovoltaic output power is greater than a first preset value according to the electric energy information; judging whether the refrigerator is connected to the mains when the photovoltaic output power is greater than the first preset value; switching the refrigerator from the photovoltaic power supply mode to the mains power supply mode when the refrigerator is connected to the mains and the mains is valley power, and charging the battery of the solar-driven photovoltaic refrigerator; judging whether the battery is in an overcharged state through a battery detection circuit, and if it is in an overcharged state, stopping charging the battery. The solar photovoltaic refrigerator directly absorbs solar energy through photovoltaic panels and converts it into electric energy for the refrigerator. During the valley power period, that is, the period when the load of the power grid is low, the power demand is reduced and the electricity price is relatively low, but the solar photovoltaic refrigerator can still provide stable power supply and does not rely on the power supply of the power grid. The refrigerator is also equipped with an energy storage system, such as a battery, which is used to store excess electricity when there is sufficient sunlight, so as to power the refrigerator during periods of low grid load such as insufficient sunlight or at night. This energy storage mechanism further enhances the independence and stability of the system and extends the service life of the refrigerator.

[0113] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A charging control method for a solar-driven photovoltaic refrigerator, characterized in that: The method comprises: Acquiring power information of a solar-driven photovoltaic refrigerator, and determining whether the photovoltaic output power is greater than a first preset value according to the power information; When the photovoltaic output power is greater than a first preset value, determining whether the refrigerator is connected to the mains; When the refrigerator is connected to the mains and the mains is off-peak, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode, and the storage battery of the solar-driven photovoltaic refrigerator is charged; The battery detection circuit is used to determine whether the battery is in an overcharged state. If the battery is in an overcharged state, charging of the battery is stopped.

2. The charging control method according to claim 1, characterized in that: The method further comprises: When the refrigerator is not connected to the mains, starting the photovoltaic power supply mode, and monitoring the photovoltaic output power in real time; When the photovoltaic output power is greater than the power used by the user, charging the storage battery; When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state; If it is not in the overcharge state, the battery is charged.

3. The charging control method according to claim 1, characterized in that: The method further comprises: When the refrigerator is connected to the mains and the mains is at peak power, a photovoltaic power supply mode is started, and photovoltaic output power and user power are obtained; When the photovoltaic output power is greater than the power used by the user, charging the storage battery; When the photovoltaic output power is less than or equal to the power used by the user, determining whether the battery is in an overcharge state; If it is in an overcharge state, the charging mode of the battery is turned off.

4. The charging control method according to claim 1, characterized in that: The method further comprises: When the photovoltaic output power is less than or equal to a first preset value, determining whether the battery is in an overcharge state through a battery detection circuit, and if it is in an overcharge state, stopping charging the battery; If it is not in the overcharge state, the battery is charged.

5. The charging control method according to claim 1, characterized in that: The method further comprises: After the refrigerator is started, if the photovoltaic power supply mode is turned on and the refrigerator is connected to the network, the weather conditions and light intensity of the current city are obtained in real time through the network; the weather conditions include sunny, cloudy, overcast and rainy and snowy; the light intensity includes low level, suitable level and high level; Determine whether the photovoltaic power supply mode conditions are met according to the weather conditions and light intensity; When the photovoltaic power supply mode condition is not met, the refrigerator is powered by an AC circuit between the battery and the mains.

6. The charging control method according to claim 5, characterized in that: When the charging condition is not met, supplying power to the refrigerator through an AC circuit between the battery and the mains includes: Obtaining the battery power information and the maximum power output of the battery; When the power level of the storage battery is less than a second preset value, determining whether the maximum power output by the storage battery is less than or equal to the power used by the user; If not, the refrigerator is switched from the photovoltaic power supply mode to the mains power supply mode.

7. A refrigerator, characterized in that: The refrigerator comprises: Control device, inverter device, display device, solar battery assembly and battery; The control device is used to control the inverter device, the display device and the solar battery assembly; the control device is configured to execute the charging control method of the solar-driven photovoltaic refrigerator according to any one of claims 1 to 6; The display device is used to display a user interface; The inverter device is used to invert the direct current output by the solar battery assembly or battery into alternating current; The solar cell assembly is used to receive solar radiation and convert it into direct current electrical energy.

8. The refrigerator according to claim 7, characterized in that: The solar battery assembly is a parallel distributed photovoltaic converter structure, which includes a photovoltaic array, a converter and a photovoltaic detection circuit.

9. The refrigerator according to claim 7, characterized in that: The inverter device comprises a full-bridge inverter circuit and a push-pull boost circuit.

10. The refrigerator according to claim 7, characterized in that: The control device comprises a communication module, a serial port driver, a control circuit and a battery detection circuit.

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