Refrigerator

Abstract

The refrigerator provided by the embodiment of the invention comprises power supply equipment which is configured to output power supply voltage; an energy storage element configured to be charged based on a supply voltage; the protection module is connected with the power supply equipment and the energy storage element, and is configured to set an upper limit value of a charging current of the energy storage element, provide a basic charging current based on the power supply voltage, and charge the energy storage element according to the basic charging current when the power supply voltage is not less than a first threshold value; when the power supply voltage is smaller than a first threshold value, the basic charging current is amplified, and the energy storage element is charged according to the amplified basic charging current; the basic charging current and the amplified basic charging current do not exceed the upper limit value of the charging current. According to the scheme, the change amplitude of the charging current can be reduced, so that the damage to the energy storage element can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to refrigerator technology, and more specifically, to a refrigerator. Background Art

[0002] Refrigerators are essential household appliances in daily life. There are many ways to power a refrigerator, such as connecting to the mains or using solar panels.

[0003] In actual applications, refrigerators are equipped with energy storage elements, which are charged by external power supply equipment to supply power to electrical components in the refrigerator. However, in some cases, the voltage output by the power supply equipment is unstable. For example, when the power in the power supply equipment is low or high, the output power supply voltage will vary greatly, which will also cause the charging current for charging the energy storage element to vary greatly, thereby damaging the energy storage element. Summary of the invention

[0004] An embodiment of the present application provides a refrigerator, aiming to solve the problem of large variation in charging current when the power supply voltage is overvoltage or undervoltage.

[0005] In a first aspect, an embodiment of the present application provides a refrigerator comprising: a power supply device configured to output a power supply voltage; an energy storage element configured to be charged based on the power supply voltage; a protection module connected to the power supply device and the energy storage element, configured to set an upper limit value of a charging current of the energy storage element, and to provide a basic charging current based on the power supply voltage, and to charge the energy storage element according to the basic charging current when the power supply voltage is not less than a first threshold value; and, when the power supply voltage is less than the first threshold value, to amplify the basic charging current, and to charge the energy storage element according to the amplified basic charging current; the basic charging current and the amplified basic charging current do not exceed the upper limit value of the charging current.

[0006] In some embodiments, the protection module is further configured to control the charging voltage of the energy storage element to not exceed a second threshold.

[0007] In some embodiments, the protection module includes: a first resistance unit, one end of which is connected to the power supply device, the first resistance unit is configured to provide resistance, and the resistance value of the first resistance unit is used to set the upper limit value of the charging current; a switch tube, one end of which is connected to the other end of the first resistance unit, the other end of the switch tube is connected to one end of the energy storage element, and the other end of the energy storage element is grounded; a control unit, which is connected to the first resistance unit, the control end of the switch tube and the other end of the energy storage element, and the control unit is configured to control the switch tube to be in a saturation state when the power supply voltage is not less than a first threshold value, and control the voltage of the control end of the switch tube to be a third threshold value, wherein the third threshold value is the sum of the second threshold value and the threshold voltage of the switch tube; and control the switch tube to be in an amplification state when the power supply voltage is less than the first threshold value.

[0008] In some embodiments, the first resistor unit includes: a first resistor, one end of the first resistor is connected to the power supply device, and the other end of the first resistor is connected to one end of the switch tube.

[0009] In some embodiments, the control unit includes: a second resistor, one end of the second resistor is connected to the power supply device and one end of the first resistor unit, and the other end of the second resistor is connected to the control end of the switch tube; a Zener diode, the positive electrode of the Zener diode is connected to the other end of the energy storage element and grounded, and the negative electrode of the Zener diode is connected to the other end of the second resistor and the control end of the switch tube.

[0010] In some embodiments, the control unit includes: a second resistor, one end of the second resistor is connected to the power supply device and one end of the first resistor unit, and the other end of the second resistor is connected to the control end of the switch tube; a first diode, the anode of the first diode is connected to the other end of the second resistor; a second diode, the cathode of the second diode is connected to the cathode of the first diode, and the anode of the second diode is connected to the other end of the second resistor and the control end of the switch tube.

[0011] In some embodiments, the refrigerator further includes: a third diode, wherein the anode of the third diode is connected to the power supply device, and the cathode of the third diode is connected to the switch tube and the protection module.

[0012] In some embodiments, the switch tube is a triode.

[0013] In some embodiments, the charging device is a solar panel.

[0014] In some embodiments, the refrigerator further includes: a linear regulator connected to the energy storage capacitor; and a power module connected to the linear regulator, the power module being configured to supply power based on a voltage output by the linear regulator.

[0015] In a second aspect, the present application also provides a control method for a refrigerator, the refrigerator comprising: a power supply device, an energy storage element and a protection module; the protection module is connected to the power supply device and the energy storage element, the method comprising: the power supply device outputs a power supply voltage; the energy storage element is charged based on the power supply voltage; the protection module sets an upper limit value of the charging current of the energy storage element, and provides a basic charging current based on the power supply voltage; the protection module charges the energy storage element according to the basic charging current when the power supply voltage is not less than a first threshold value; and, when the power supply voltage is less than the first threshold value, amplifies the basic charging current, and charges the energy storage element according to the amplified basic charging current; the basic charging current and the amplified basic charging current do not exceed the upper limit value of the charging current.

[0016] In a third aspect, the present application provides a computer-readable storage medium, on which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, the above-mentioned method is implemented.

[0017] In a fourth aspect, the present application provides a computer program product, including a computer program, which implements the above-described method when executed by a processor.

[0018] In the refrigerator provided by the embodiment of the present application, a protection module is connected between the power supply device and the energy storage element, and the protection module provides a reference charging current based on the power supply voltage, and when the power supply voltage is not less than the first threshold, the energy storage element is charged according to the current reference charging current, and the current reference charging current is the upper limit of the charging current, and when the power supply voltage is less than the first threshold, the current reference charging current is amplified, and the amplified reference charging current does not exceed the upper limit of the charging current. This solution limits the charging current when the power supply voltage is not less than the first threshold, and amplifies the charging current when the power supply voltage is less than the first threshold, thereby reducing the variation of the charging current, thereby reducing the damage to the energy storage element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 is a schematic diagram of the structure of a refrigerator in an example;

[0021] Figure 2 is a schematic diagram of the structure of a refrigeration system of a refrigerator in an example;

[0022] Figure 3 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] 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.

[0029] 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 common and usual meanings.

[0030] In addition, the terms "including" and "having" 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.

[0031] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Figure 1 is a schematic diagram of the structure of a refrigerator in an example. Figure 1 As shown, the refrigerator includes a box body and a refrigeration system, wherein a storage chamber and / or a freezer chamber is arranged in the box body for storing items that need to be kept fresh or frozen; the refrigeration system is used to perform the refrigeration operation of the refrigerator to provide refrigerant to the storage chamber or the freezer chamber.

[0035] Figure 2 FIG. 1 is a schematic diagram of a refrigerator refrigeration system in an example. Figure 2 As shown, the refrigeration system includes: a control circuit 20, a compressor 23, a condenser 24, a drying filter 25, a capillary tube 26, an evaporator 27, and a gas-liquid separator 28.

[0036] The working process of the refrigeration system includes: control circuit, compression process, condensation process, throttling process and evaporation process. The compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the control circuit 20 drives the compressor 23 to start working, the low-temperature and low-pressure refrigerant is sucked into the compressor 23, compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 23, and then discharged into the condenser 24; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 24, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and further cooled to a saturated liquid, the temperature no longer drops, the temperature at this time is called the condensation temperature, and the pressure of the refrigerant is almost unchanged during the entire condensation process ; The throttling process is as follows: the condensed refrigerant saturated liquid passes through the drying filter 25 to remove moisture and impurities and then flows into the capillary 26, through which throttling and pressure reduction are performed, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 27, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 27 passes through the gas-liquid separator 28 and returns to the compressor 23 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0037] In some examples, the refrigerator is provided with an energy storage element, wherein the energy storage element may be an energy storage capacitor or an energy storage inductor, etc. The energy storage element is charged by an external power supply device, which may be a solar panel, a battery, or other power supply device. The energy storage element may supply power to electrical components in the refrigerator, for example, the lighting device in the refrigerator may be supplied with power by the energy storage capacitor.

[0038] However, in some cases, the voltage output by the power supply equipment is unstable. Take solar panels as an example. When the solar panel has sufficient power, the output power supply voltage can reach 8V, while when the power is insufficient, the lower limit of the output power supply voltage is 2V. The difference in power supply voltage is relatively large, and the charging current of the energy storage element also changes greatly with the change of the charging voltage. When the current is too large or too low, it will cause damage to the energy storage element.

[0039] To this end, an embodiment of the present application provides a refrigerator, in which a protection module is connected between a power supply device and an energy storage element, the protection module provides a reference charging current based on a power supply voltage, and when the power supply voltage is not less than a first threshold value, the energy storage element is charged according to the current reference charging current, and the current reference charging current is the upper limit value of the charging current, and when the power supply voltage is less than the first threshold value, the current reference charging current is amplified, and the amplified reference charging current does not exceed the upper limit value of the charging current. This solution limits the charging current when the power supply voltage is not less than the first threshold value, and amplifies the charging current when the power supply voltage is less than the first threshold value, thereby reducing the variation amplitude of the charging current, thereby reducing the damage to the energy storage element.

[0040] 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.

[0041] Figure 3 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the refrigerator in this application includes:

[0042] A power supply device 21, configured to output a power supply voltage;

[0043] The energy storage element 23 is configured to be charged based on the supply voltage;

[0044] The protection module 22 is connected to the power supply device 21 and the energy storage element 23, and is configured to set an upper limit value of the charging current of the energy storage element 23, and provide a basic charging current based on the power supply voltage. When the power supply voltage is not less than a first threshold value, the energy storage element 23 is charged according to the basic charging current; and when the power supply voltage is less than the first threshold value, the basic charging current is amplified, and the energy storage element 23 is charged according to the amplified basic charging current; the basic charging current when the power supply voltage is greater than the first threshold value is the upper limit value of the charging current of the energy storage element 23, and the amplified basic charging current does not exceed the upper limit value of the charging current.

[0045] The power supply device 21 in this embodiment includes, but is not limited to: solar panels, batteries. The power supply voltage output by the power supply device 21 is related to the amount of electricity stored in the power supply device 21. When the stored amount of electricity is high, a larger voltage is output, and when the amount of electricity present is small, a smaller charging voltage is output. The power supply device 21 can set a minimum power supply voltage and a maximum power supply voltage. The energy storage element 23 can be an energy storage capacitor. It should be noted that the division of the modules of the refrigerator in this embodiment is only a schematic, and this application does not limit the division of the modules and the naming of the modules.

[0046] The protection module 22 is connected between the power supply device 21 and the energy storage element 23, and is used to adjust the charging voltage and charging current of the energy storage element 23. The protection module 22 can set the upper limit of the charging current of the energy storage element 23, wherein the upper limit of the charging current can be set based on the maximum allowable current of the energy storage element 23. For example, the maximum allowable current that the energy storage element 23 can withstand is 3A, so 2A can be set as the upper limit of the charging current of the energy storage element 23, that is, as long as the upper limit of the charging current does not exceed the maximum allowable current, the specific setting value is not limited in this embodiment.

[0047] The protection module 22 in this embodiment also provides a basic charging current based on the power supply voltage. The basic charging current changes with the change of the power supply voltage. When the power supply voltage is not less than the first threshold, the basic charging current is used as the current charging current to charge the energy storage element 23, and the current basic charging current does not exceed the upper limit of the charging current, and when the power supply voltage is less than the first threshold, the basic charging current is amplified, and the amplified basic charging current does not exceed the upper limit of the charging current. The first threshold is less than the maximum value of the power supply voltage. It can be understood that the maximum charging current in this embodiment is the upper limit of the charging current set by the protection module 22, and the upper limit can be set to be less than the maximum allowable current of the energy storage element 23, so that the damage to the energy storage element 23 can be reduced. Moreover, when the power supply voltage is small, charging is performed based on the amplified basic charging current, which can reduce the variation of the charging current. For example, if the minimum value of the power supply voltage is 3V and the maximum value is 8V, the upper limit of the charging current is set to 2A, and when the power supply voltage is not less than the first threshold 5V, charging is performed based on the current basic charging current, that is, 2A. If the minimum value of the power supply voltage is 3V, the power supply voltage is less than the first threshold value, and the current basic charging current is 0.5A, then 0.5A is amplified to 1A, and the charging current changes in the range of 1A to 2A. That is, in this embodiment, the charging current is limited when the power supply voltage is large, and the charging current is amplified when the power supply voltage is small, so that the change range of the charging current can be reduced, thereby reducing the damage to the energy storage element 23.

[0048] In some examples, the protection module 22 is further configured to control the charging voltage of the energy storage element 23 not to exceed the second threshold. In this example, the charging voltage output by the protection module 22 does not exceed the second threshold, which can avoid damage to the energy storage element 23 caused by excessive voltage, thereby further improving the reliability of charging.

[0049] The specific structure of the protection module 22 will be further described below.

[0050] In some examples, Figure 4 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the protection module 22 includes:

[0051] a first resistor unit 221, one end of which is connected to the power supply device 21, and the first resistor unit 221 is configured to provide resistance, and the resistance value of the first resistor unit 221 is used to set an upper limit value of the charging current;

[0052] A switch tube Q1, one end of the switch tube Q1 is connected to the other end of the first resistor unit 221, the other end of the switch tube Q1 is connected to one end of the energy storage element 23, and the other end of the energy storage element 23 is grounded;

[0053] The control unit 222 is connected to the first resistance unit 221, the control end of the switch tube Q1 and the other end of the energy storage element 23. The control unit 222 is configured to control the switch tube Q1 to be in a saturation state when the power supply voltage is not less than the first threshold, and control the voltage of the control end of the switch tube Q1 to be a third threshold, where the third threshold is the sum of the second threshold and the threshold voltage of the switch tube Q1; and control the switch tube Q1 to be in an amplification state when the power supply voltage is less than the first threshold.

[0054] In this example, the first resistance unit 221 can provide resistance, and the resistance value of the first resistance unit 221 can set the upper limit value of the charging current. For example, the maximum value of the power supply voltage output by the power supply device 21 is 8V, and the resistance value of the first resistance unit 221 is 4Ω, then the upper limit value of the charging current can be set to 2A. Therefore, the upper limit value of the charging current can be set based on the resistance value of the first resistance unit 221. As an example, the first resistance unit 221 may include a first resistor R1, one end of the first resistor R1 is connected to the power supply device 21, and the other end of the first resistor R1 is connected to one end of the switch tube Q1. Of course, the first resistance unit 221 may also include multiple first resistors R1, and the multiple first resistors R1 may be connected in series or in parallel.

[0055] In this example, the switch tube Q1 has an amplification function and a shutdown function. The specific switch tube Q1 can be a triode, or a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, referred to as MOSFET). The control end of the switch tube Q1 is connected to the control unit 222. When the power supply voltage is not less than the first threshold, the control unit 222 controls the switch tube Q1 to be in a saturated state, so that the switch tube Q1 is turned on and is equivalent to a wire, so the basic charging current at this time is the upper limit of the charging current. If the power supply voltage is too small, so that the voltage at the control end of the switch tube Q1 is less than the threshold voltage of the switch tube Q1, the switch tube Q1 is disconnected, so based on this example, the lower limit of the charging voltage can be set. When the power supply voltage is less than the first threshold, the basic charging current will become smaller. At this time, the control unit 222 can control the switch tube Q1 to be in an amplified state, so that the switch tube Q1 can amplify the current basic charging current.

[0056] In addition, when the power supply voltage is not less than the first threshold, the control unit 222 controls the voltage at the control end of the switch tube Q1 to be the third threshold. The third threshold is the sum of the second threshold and the threshold voltage of the switch tube Q1, and the threshold voltage is the voltage at which the switch tube Q1 can be turned on. In other words, the control unit 222 can clamp the voltage at the control end of the light-opening tube to the third threshold. This can prevent the voltage at the control end from being too high and breaking through the switch tube Q1.

[0057] In this example, based on the first resistor unit 221, the switch tube Q1 and the control unit 222, it is possible to charge the energy storage element 23 according to the basic charging current when the power supply voltage is not less than the first threshold; and, when the power supply voltage is less than the first threshold, amplify the basic charging current, and charge the energy storage element 23 according to the amplified basic charging current, thereby reducing the variation amplitude of the charging current.

[0058] As a way to achieve this, Figure 5 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the control unit 222 includes:

[0059] A second resistor R2, one end of the second resistor R2 is connected to the power supply device 21 and one end of the first resistor unit 221, and the other end of the second resistor R2 is connected to the control end of the switch tube Q1;

[0060] The voltage stabilizing diode VD1 has an anode connected to the other end of the energy storage element 23 and grounded, and a cathode connected to the other end of the second resistor R2 and the control end of the switch tube Q1.

[0061] The working principle of this embodiment will be described below in combination with an actual scenario: the maximum output voltage of the energy storage device is 8V, the energy storage element 23 is an energy storage capacitor, wherein the maximum voltage that the energy storage capacitor can withstand is 6.3V, and the maximum current is 3A, thus setting the resistance of the first resistor R1 to 4Ω, and the first threshold value to 4.5V. Figure 5 , the basic charging current calculation formula is:

[0062]

[0063] Where V A for Figure 5 The voltage at point A is also the voltage at the other end of the first resistor R1. 供 ≥6V (first threshold), the transistor is in saturation state, then I 充 =I 基 , V A =V 充 , the upper limit of the charging current is the charging current when the supply voltage is 8V and the energy storage capacitor is 0V, then I 限 =2A. And at V 供 ≥6V, V 供 =V C +V th , where V C is the voltage at point C, V th is the threshold voltage of the switch tube Q1. The breakdown voltage of the voltage-stabilizing diode VD1 can be equal to the third threshold value. The third threshold value is set to 4.7V. The voltage-stabilizing diode VD1 can clamp the control terminal voltage of the switch tube Q1 to 4.7V. The threshold voltage V th can be 0.6V, then V 充 =4.7-0.6=4.1V, 4.1V is also the second threshold. 供 ≥6V, the energy storage capacitor can be charged based on a charging voltage that does not exceed the second threshold value. That is, in this embodiment, the upper limit of the charging voltage can be limited based on the breakdown voltage of the voltage stabilizing diode VD1 so that the charging voltage does not exceed the second threshold value. 供 <6V, the transistor is in the amplification state, then I 充 =I 基 +I 控 , where is the current at the control end of the transistor, i.e. the base current, I 充 =βI 控 , β is the amplification factor of the triode. From this, we can know that

[0064]

[0065] The highest voltage at point C is the breakdown voltage of the Zener diode, 4.7V. Therefore, based on the setting of the second resistor R2, the I 控 , and thus achieve the 充 , so that I 充 Therefore, in this embodiment, when the power supply voltage is not less than the first threshold, the charging current and the charging voltage are limited, and when the power supply voltage is less than the first threshold, the basic charging current is amplified.

[0066] As another implementation, Figure 6 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the control unit 222 includes:

[0067] A second resistor R2, one end of the second resistor R2 is connected to the power supply device 21 and one end of the first resistor unit 221, and the other end of the second resistor R2 is connected to the control end of the switch tube Q1;

[0068] A first diode D1, wherein an anode of the first diode D1 is connected to the other end of the second resistor R2;

[0069] The second diode D2 has a cathode connected to the cathode of the first diode D1 , and an anode connected to the other end of the second resistor R2 and the control end of the switch tube Q1 .

[0070] Compared with the above real-time method, the voltage of the switch tube Q1 is clamped based on two reverse series-connected diodes in this embodiment. The working principle of other structures is similar to the above embodiment, please refer to the above embodiment for details, and will not be repeated here.

[0071] In some examples, Figure 7 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the refrigerator also includes:

[0072] The third diode D3 has an anode connected to the power supply device 21 , and a cathode connected to the switch tube Q1 and the protection module 22 .

[0073] The third diode D3 in this example can control the current to flow in one direction, that is, the current can only be allowed to flow from the power supply device 21 to the protection module 22, so that the current can be prevented from flowing in the reverse direction, thereby protecting the power supply device 21.

[0074] In some examples, Figure 8 A schematic diagram of the structure of another refrigerator provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the refrigerator also includes:

[0075] A linear voltage regulator 24, the linear voltage regulator 24 is connected to the energy storage element 23;

[0076] The power module 25 is connected to the linear regulator 24 , and is configured to supply power based on the voltage output by the linear regulator 24 .

[0077] In this example, the linear regulator 24 may be a low dropout linear regulator 24 (Low Dropout Linear Regulator, LDO for short), which can stabilize the voltage output by the energy storage element 23. The LDO may be connected to the power module 25, which may be a compressor in a refrigerator, lighting equipment, etc.

[0078] In the refrigerator provided in the embodiment of the present application, a protection module is connected between the power supply device and the energy storage element, the protection module provides a reference charging current based on the power supply voltage, and when the power supply voltage is not less than a first threshold value, the energy storage element is charged according to the current reference charging current, and the current reference charging current is the upper limit value of the charging current, and when the power supply voltage is less than the first threshold value, the current reference charging current is amplified, and the amplified reference charging current does not exceed the upper limit value of the charging current. This scheme limits the charging current when the power supply voltage is not less than the first threshold value, and amplifies the charging current when the power supply voltage is less than the first threshold value, thereby reducing the variation amplitude of the charging current, thereby reducing damage to the energy storage element.

[0079] In other embodiments, the present application further provides a method for controlling a refrigerator, the refrigerator comprising: a power supply device, an energy storage element and a protection module; the protection module is connected to the power supply device and the energy storage element, the method comprising:

[0080] The power supply equipment outputs the power supply voltage;

[0081] The energy storage element is charged based on the supply voltage;

[0082] The protection module sets an upper limit value of the charging current of the energy storage element and provides a basic charging current based on the supply voltage;

[0083] The protection module charges the energy storage element according to the basic charging current when the supply voltage is not less than a first threshold value; and amplifies the basic charging current and charges the energy storage element according to the amplified basic charging current when the supply voltage is less than the first threshold value; the basic charging current and the amplified basic charging current do not exceed the upper limit value of the charging current.

[0084] The execution subject of the method in this embodiment may be the refrigerator in any of the above embodiments, and its implementation principle and technical effect are similar, which will not be repeated here.

[0085] The present application also provides 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.

[0086] 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 control method provided by the above various embodiments.

[0087] 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.

[0088] 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: The refrigerator comprises: A power supply device configured to output a power supply voltage; an energy storage element configured to be charged based on the supply voltage; A protection module is connected to the power supply device and the energy storage element, and is configured to set an upper limit value of the charging current of the energy storage element, and provide a basic charging current based on the power supply voltage, and when the power supply voltage is not less than a first threshold, charge the energy storage element according to the basic charging current; and when the power supply voltage is less than the first threshold, amplify the basic charging current, and charge the energy storage element according to the amplified basic charging current; the basic charging current and the amplified basic charging current do not exceed the upper limit value of the charging current.

2. The refrigerator according to claim 1, characterized in that: The protection module is further configured to control the charging voltage of the energy storage element to not exceed a second threshold.

3. The refrigerator according to claim 2, characterized in that: The protection module comprises: a first resistance unit, one end of which is connected to the power supply device, the first resistance unit being configured to provide resistance, and the resistance value of the first resistance unit being used to set an upper limit value of the charging current; a switch tube, one end of which is connected to the other end of the first resistor unit, the other end of which is connected to one end of the energy storage element, and the other end of which is grounded; A control unit is connected to the first resistance unit, the control end of the switch tube and the other end of the energy storage element. The control unit is configured to control the switch tube to be in a saturation state when the power supply voltage is not less than a first threshold value, and control the voltage of the control end of the switch tube to be a third threshold value, wherein the third threshold value is the sum of the second threshold value and the threshold voltage of the switch tube; and control the switch tube to be in an amplification state when the power supply voltage is less than the first threshold value.

4. The refrigerator according to claim 3, characterized in that: The first resistance unit comprises: A first resistor, one end of the first resistor is connected to the power supply device, and the other end of the first resistor is connected to one end of the switch tube.

5. The refrigerator according to claim 3, characterized in that: The control unit comprises: a second resistor, one end of the second resistor being connected to the power supply device and one end of the first resistor unit, and the other end of the second resistor being connected to the control end of the switch tube; A voltage stabilizing diode, wherein the positive electrode of the voltage stabilizing diode is connected to the other end of the energy storage element and is grounded, and the negative electrode of the voltage stabilizing diode is connected to the other end of the second resistor and the control end of the switch tube.

6. The refrigerator according to claim 3, characterized in that: The control unit comprises: a second resistor, one end of the second resistor being connected to the power supply device and one end of the first resistor unit, and the other end of the second resistor being connected to the control end of the switch tube; a first diode, wherein an anode of the first diode is connected to the other end of the second resistor; A second diode, wherein a cathode of the second diode is connected to a cathode of the first diode, and an anode of the second diode is connected to the other end of the second resistor and the control end of the switch tube.

7. The refrigerator according to any one of claims 3 to 6, characterized in that: The refrigerator further comprises: A third diode, wherein the anode of the third diode is connected to the power supply device, and the cathode of the third diode is connected to the switch tube and the protection module.

8. The refrigerator according to any one of claims 3 to 6, characterized in that: The switch tube is a triode.

9. The refrigerator according to any one of claims 3 to 6, characterized in that: The charging device is a solar panel.

10. The refrigerator according to any one of claims 3 to 6, characterized in that: The refrigerator further comprises: A linear voltage regulator connected to the energy storage element; The power module is connected to the linear regulator, and is configured to supply power based on the voltage output by the linear regulator.

Images