Refrigerator and refrigerator power adaptive power supply control method

Abstract

The application discloses a refrigerator and a power self-adaptive power supply control method of the refrigerator. When a direct-current power supply externally input is detected, a compressor is started with preset minimum power as current power, and an initial voltage of the power supply is detected. When the detected initial voltage is not lower than preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude on the basis of the minimum power, it is judged whether the current power of the compressor reaches preset maximum power, and the change of the power supply power of the power supply is detected. When the current power of the compressor does not reach the maximum power, and the power supply power of the power supply is not reduced, the current power of the compressor is increased by the first amplitude. When the current power of the compressor reaches the maximum power, the compressor is kept running at the maximum power. The power self-adaptive control of the refrigerator under direct-current power supply is realized, and the utilization of direct-current power supply energy is maximized.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and in particular to a refrigerator and a refrigerator power adaptive power supply control method. Background Technology

[0002] A refrigerator is a household appliance that provides low-temperature storage, allowing food to be stored at low temperatures through the opening and closing of its door. To achieve this, the refrigerator cools the interior of the storage space by using cold air generated through heat exchange with the refrigerant circulating in the refrigeration cycle, thus preserving food at its optimal condition. However, while refrigerators bring convenience to life, they also consume a significant amount of electricity.

[0003] With the development and promotion of low-carbon energy such as photovoltaics, photovoltaic DC energy can be used to power all-DC refrigerators that use AC-DC compatibility or complementarity. However, at present, the power of photovoltaic DC power supply is basically controlled according to fixed control rules, which makes it difficult to adapt to the fluctuations of photovoltaic power supply, resulting in low energy utilization rate of photovoltaic power supply. Summary of the Invention

[0004] The purpose of this invention is to provide a refrigerator and a refrigerator power adaptive power supply control method, so as to realize the refrigerator power adaptive control under DC power supply and maximize the utilization of DC power supply energy.

[0005] This invention provides a refrigerator, comprising:

[0006] Controller, used for:

[0007] When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected.

[0008] When the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected.

[0009] When the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude to determine whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected.

[0010] When the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power.

[0011] Preferably, the refrigerator further includes a storage battery;

[0012] The controller is also used for:

[0013] When the power supply power decreases, the compressor's current power is reduced by a preset second amplitude, the power supply power change is re-detected, and it is determined whether the compressor's current power is lower than the preset minimum power.

[0014] When the power supply power decreases and the current power of the compressor is not lower than the minimum power, the current power of the compressor is reduced by the second amplitude, the power supply power change is detected again, and it is determined whether the current power of the compressor is lower than the minimum power.

[0015] When the compressor's current power is lower than the minimum power, the power supply to the compressor is switched to the battery.

[0016] Furthermore, the refrigerator includes at least one storage compartment;

[0017] The controller is also used for:

[0018] After keeping the compressor running at the aforementioned maximum power, monitor the temperature of the storage compartment;

[0019] When the temperature of each storage compartment is detected to be no higher than the corresponding set operating temperature of that storage compartment, and the temperature change of each storage compartment within a preset time period is less than a preset range, the defrosting function is activated.

[0020] As a preferred embodiment, the refrigerator also includes a defrosting heater;

[0021] The controller is also used for:

[0022] When the defrosting function is activated, the defrosting heater is started with the preset minimum defrosting power as the current defrosting power. The power supply power is monitored for changes and it is determined whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power.

[0023] When the current defrosting power of the defrosting heater has not reached the preset maximum defrosting power and the power supply power has not decreased, the current defrosting power of the defrosting heater is increased by a preset third value to determine whether the current defrosting power of the defrosting heater has reached the maximum defrosting power, and the power supply power change is re-detected.

[0024] When the current defrosting power of the defrosting heater reaches the maximum defrosting power, the defrosting heater is kept running at the maximum defrosting power.

[0025] Furthermore, the controller is also used for:

[0026] When the power supply power decreases, the current defrosting power of the defrosting heater is reduced by the preset fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the preset minimum defrosting power.

[0027] When the power supply power decreases and the current defrosting power of the defrosting heater is not lower than the minimum power, the current defrosting power of the defrosting heater is reduced by the fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the minimum defrosting power.

[0028] When the current defrosting power of the defrosting heater is lower than the minimum defrosting power, the defrosting function is turned off.

[0029] As a preferred embodiment, the controller is further configured to:

[0030] When the detected initial voltage is lower than the rated supply voltage, the power supply power is detected.

[0031] When the power supply is lower than the preset rated power supply but higher than the preset rated standby power, the current working status of the refrigerator is detected.

[0032] When the refrigerator is in standby mode, it is powered by an external DC power supply.

[0033] When the refrigerator is in normal operation, it is powered by a storage battery.

[0034] As an improvement to the above solution, the controller is also used for:

[0035] When the power supply power is lower than the rated standby power, a storage battery is used for power supply;

[0036] When powered by a storage battery, the compressor is controlled to operate at the preset maximum operating temperature as the maintenance temperature of the refrigerator's storage compartment.

[0037] Preferably, the refrigerator further includes a storage battery;

[0038] The controller is also used for:

[0039] After the defrosting heater is running at the highest defrosting power, the battery is charged with the preset minimum charging power as the current charging power. The change in the power supply power is detected, and it is determined whether the current charging power of the battery has reached the preset maximum charging power.

[0040] When the current charging power of the battery has not reached the preset maximum charging power and the power supply power has not decreased, the current charging power of the battery is increased by a preset fifth amplitude, it is determined whether the current charging power of the battery has reached the maximum charging power, and the power supply power change is re-detected.

[0041] When the current charging power of the battery reaches the maximum charging power, the battery is kept running at the maximum charging power until the battery is fully charged.

[0042] As an improvement to the above solution, the controller is also used for:

[0043] When the charging power of the power supply decreases, the current charging power of the battery is reduced by the preset sixth amplitude value, the change of the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the preset minimum charging power.

[0044] When the charging power of the power supply decreases and the current charging power of the battery is not lower than the minimum power, the current charging power of the battery is reduced by the sixth amplitude, the change in the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the minimum charging power.

[0045] When the current charging power of the battery is lower than the minimum charging power, charging of the battery is stopped.

[0046] This invention also provides a refrigerator power adaptive power supply control method, wherein the method:

[0047] When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected.

[0048] When the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected.

[0049] When the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude to determine whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected.

[0050] When the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power.

[0051] Compared with existing technologies, the refrigerator and refrigerator power adaptive power supply control method disclosed in this invention, upon detecting an external DC power input, starts the compressor with a preset minimum power as the current power and detects the initial voltage of the power supply; when the detected initial voltage is not lower than a preset rated power supply voltage, the compressor's current power is increased by a preset first amplitude based on the minimum power, and it is determined whether the compressor's current power has reached a preset maximum power, while detecting changes in the power supply's output; when the compressor's current power has not reached the maximum power and the power supply's output has not decreased, the compressor's current power is increased by the first amplitude, and it is determined whether the compressor's current power has reached the preset maximum power, while re-detecting changes in the power supply's output. When the compressor's current power reaches the maximum power, the compressor is maintained at the maximum power. Using the technical means of this invention, after connecting to an external power supply, the compressor and refrigerator are started at minimum power. By detecting the initial power supply voltage, and ensuring it is sufficient for normal refrigerator operation, the compressor's operating power is increased. The power supply's output is then monitored for changes, specifically power fluctuations caused by the increased compressor power. If the power supply's output does not decrease, the compressor's operation is gradually increased until it reaches a preset maximum power and is maintained at that power. By adjusting the refrigerator's power, when photovoltaic power is sufficient, the refrigerator can operate at high power to deeply cool compartments without temperature limits, such as the freezer or cold storage compartment, to store cold energy and fully utilize photovoltaic energy. This achieves adaptive power control of the refrigerator under DC power supply, maximizing the utilization of DC power energy. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention;

[0053] Figure 2 This is a schematic diagram of the refrigeration system structure of the refrigerator provided in an embodiment of the present invention;

[0054] Figure 3 This is a structural schematic diagram of the refrigerator in operation according to an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram of the control flow of the controller provided by the present invention in the first embodiment;

[0056] Figure 5 This is a schematic diagram of the control flow of the controller provided by the present invention in the first embodiment;

[0057] Figure 6 This is a schematic diagram of the structure of a refrigerator provided in another embodiment of the present invention;

[0058] Figure 7 This is a schematic diagram of the control flow of the controller performed in the second embodiment of the present invention;

[0059] Figure 8 This is a schematic diagram of the control flow of the controller performed in the fourth embodiment of the present invention;

[0060] Figure 9 This is a schematic diagram of the control flow of the controller performed in the fifth embodiment of the present invention;

[0061] Figure 10 This is a schematic diagram of the control flow of the controller performed in the sixth embodiment of the present invention;

[0062] Figure 11 This is a schematic diagram of the control flow of the controller performed in the eighth embodiment of the present invention;

[0063] Figure 12 This is a schematic diagram of the control flow of the controller provided by the present invention in the ninth embodiment. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0066] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] See Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of the present invention. The present invention provides a refrigerator including a cabinet 101, a storage compartment 102 provided in the cabinet, including a refrigerator compartment and / or a freezer compartment, for storing items that require preservation or freezing, and a refrigeration system 104 for performing the refrigeration operation of the refrigerator.

[0069] It should be noted that the refrigerator operates through the refrigeration system, providing cooling capacity to the storage compartment to maintain it at a constant low temperature. Specifically, see... Figure 2 This is a schematic diagram of the refrigeration system structure of a refrigerator provided in an embodiment of the present invention. The refrigeration system consists of a compressor 201, a condenser 202, a dryer filter 203, a capillary tube 204, and an evaporator 205. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0070] The compression process is as follows: When the refrigerator is plugged in and there is a need for cooling, the compressor starts working. Low-temperature, low-pressure refrigerant is drawn into the compressor and compressed into high-temperature, high-pressure superheated gas in the compressor cylinder before being discharged into the condenser. The condensation process is as follows: The high-temperature, high-pressure refrigerant gas dissipates heat through the condenser, and its temperature continuously decreases until it is gradually cooled into room-temperature, high-pressure saturated vapor, and further cooled into saturated liquid. The temperature at this point is no longer decreasing and is called the condensation temperature. The pressure of the refrigerant remains almost constant throughout the entire condensation process. The throttling process is as follows: After condensation, the saturated refrigerant liquid is filtered through a dryer to remove moisture and impurities before flowing into a capillary tube, where it undergoes throttling and pressure reduction, turning the refrigerant into room-temperature, low-pressure wet vapor. The evaporation process is as follows: Subsequently, the refrigerant begins to absorb heat and vaporize in the evaporator, which not only lowers the temperature of the evaporator and its surroundings but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant exiting the evaporator returns to the compressor, repeating the above process to transfer heat from inside the refrigerator to the outside air, thus achieving the purpose of cooling.

[0071] It should be noted that the above embodiments are only for the specific structure and working principle of a conventional refrigerator. The refrigerator disclosed in this embodiment may also have the structure of the existing refrigerators to achieve the corresponding functions.

[0072] This embodiment uses an AC / DC compatible or complementary all-DC refrigerator. That is, the refrigerator's loads, such as the compressor, fan, damper, defrost heater, compensating heater, anti-condensation heater, solenoid valve, sterilizer, air purifier, and lighting, as well as their control circuits, all use AC / DC compatible power supply methods.

[0073] However, existing all-DC refrigerators using DC power generally employ a stable DC power supply to meet the needs of high-power loads such as compressors and defrosting heaters that operate continuously. However, existing photovoltaic (PV) power supply systems are affected by sunlight, temperature, and equipment performance, making it difficult for PV power to meet the demand for stable, high-power DC power. PV power can only be used under stable high-power PV power conditions, resulting in low PV utilization. Existing solutions using batteries to store energy for PV power supply suffer significant losses during the storage process, further reducing PV utilization. Therefore, this design employs an adaptive power supply control method for high-power loads such as compressors and defrosting heaters that operate continuously. This adapts to varying illuminance levels and battery charge levels, ensuring the refrigerator functions normally and maximizing the utilization of PV energy.

[0074] The refrigerator provided in this embodiment of the invention includes: a cabinet, a refrigeration circuit consisting of a compressor, and a controller for adaptive power supply control;

[0075] See Figure 3 This is a structural schematic diagram of the working state of a refrigerator provided in an embodiment of the present invention; it includes a photovoltaic device 301, a controller 302, and a compressor 201;

[0076] It should be noted that in this embodiment, the external DC power supply is output by the photovoltaic device. In other embodiments, the external DC power supply may be provided by wind power or other DC power sources.

[0077] The compressor, located inside the housing, is a key component of the refrigeration system used to realize the circulation of refrigerant; in this embodiment, the specific operation control of the refrigeration circuit is explained by the specific power supply control of the compressor.

[0078] Users can easily access items stored in the refrigerator compartment through the door located at the opening of the refrigerator body;

[0079] A refrigerator's storage compartments can be specifically divided into a refrigerator compartment and a freezer compartment, each used to perform different functions of preserving food.

[0080] See Figure 4 This is a schematic diagram of the control flow of the controller provided by the present invention in the first embodiment. The controller is used to perform the following steps:

[0081] S1, When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected.

[0082] S2, when the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected.

[0083] S3, when the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude, it is determined whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected.

[0084] S4, when the current power of the compressor reaches the maximum power, keep the compressor running at the maximum power.

[0085] When the controller is in operation, please refer to... Figure 5 This is a schematic diagram of the control flow of the controller provided by the present invention in the first embodiment;

[0086] S501 detects the DC power supply terminal;

[0087] S502, determines whether the DC power supply terminal detects an externally input DC power supply;

[0088] If not, return to step S501;

[0089] If so, proceed to step S503;

[0090] S503, with the lowest power P 1 0. Start the compressor;

[0091] S504 detects the initial voltage V0 of the power supply.

[0092] S505, determine if V0 < V T Whether it is true or false, that is, whether the initial voltage V0 is lower than the rated supply voltage V. T ;

[0093] If not, proceed to step S506, that is, when the detected initial voltage is not lower than the preset rated supply voltage, proceed to the next step of power adaptive control.

[0094] S506, P 1 t =P 1 t-1 +ΔP1, that is, at the lowest power P 1Based on 0, the current power of the compressor is increased by a first amplitude ΔP1, P 1 1 = P 1 0+ΔP1, and with the updated P 1 1 as the current power P 1 t The compressor operation is controlled so that when the compressor starts at minimum power under DC drive, and the photovoltaic voltage is not lower than the rated power supply voltage, the current power of the compressor can be increased so that the refrigerator can achieve better cooling effect.

[0095] S507, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after adjusting the current power of the compressor, and determine whether the power supply of the power supply has decreased before and after adjusting the current power of the compressor.

[0096] If not, it indicates that the power supply of the compressor has not decreased before and after the current power adjustment, and step S508 is executed;

[0097] S508, determine P 1 t <P 1 max Whether it is true or false; that is, to determine the current power P of the compressor. 1 t Has the maximum power P been reached? 1 max ;

[0098] If so, proceed to step S509.

[0099] If not, proceed to step S510;

[0100] S509, P 1 t =P 1 t-1 +ΔP1, and jump to S507; that is, when the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude, and then the judgment of whether the current power of the compressor has reached the preset maximum power and the change of the power supply power are continued.

[0101] S510, keeping the compressor at maximum power P 1 max Operation means that when the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power.

[0102] It should be noted that, in this embodiment, the detection and judgment process of the power supply can also be performed by detecting the voltage of the power supply. That is, after increasing the current power of the compressor by a preset first amplitude, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply voltage is detected. Subsequently, the adaptive process is controlled according to the change of the power supply voltage.

[0103] In this embodiment, the minimum power is not higher than the maximum power. The minimum power should be set to the minimum power allowed by the refrigerator compressor, and the maximum power can be set to the rated power or the maximum allowed power of the refrigerator compressor.

[0104] After connecting to an external power source, the compressor and refrigerator start at minimum power. By detecting the initial voltage, and ensuring it's sufficient for normal refrigerator operation, the compressor's operating power is increased. The power supply's output is monitored for fluctuations caused by the increased compressor power. If the power supply output remains constant, the compressor's operation is gradually increased until it reaches a preset maximum power and is maintained at that power. By adjusting the refrigerator's power, when sufficient photovoltaic power is available, the refrigerator can operate at high power to deeply cool compartments without temperature limits, such as the freezer or cold storage compartments, to store cold energy and fully utilize photovoltaic energy. This achieves adaptive power control of the refrigerator under DC power supply, maximizing the utilization of DC power energy.

[0105] Example 2

[0106] In another embodiment of the present invention, the refrigerator further includes a storage battery;

[0107] The controller is also used for:

[0108] When the power supply power decreases, the compressor's current power is reduced by a preset second amplitude, the power supply power change is re-detected, and it is determined whether the compressor's current power is lower than the preset minimum power.

[0109] When the power supply power decreases and the current power of the compressor is not lower than the minimum power, the current power of the compressor is reduced by the second amplitude, the power supply power change is detected again, and it is determined whether the current power of the compressor is lower than the minimum power.

[0110] When the compressor's current power is lower than the minimum power, the power supply to the compressor is switched to the battery.

[0111] In the specific implementation of this embodiment, please refer to Figure 6 This is a schematic diagram of the structure of a refrigerator provided in another embodiment of the present invention;

[0112] The refrigerator provided in this embodiment of the invention also includes a storage battery 601 for storing electrical energy and maintaining power supply when external power supply is insufficient.

[0113] See Figure 7 This is a schematic diagram of the control flow of the controller provided by the present invention in the second embodiment; the controller performs the following steps during specific operation:

[0114] S701, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after adjusting the current power of the compressor, and determine whether the power supply of the power supply has decreased before and after adjusting the current power of the compressor. This step corresponds to step S507 in the previous embodiment.

[0115] If so, it indicates that the power supply of the compressor has decreased before and after the current power adjustment, and step S702 is executed.

[0116] If not, then step S508 in the previous embodiment is executed, that is, determining P. 1 t <P 1 max Whether it is true or false; that is, to determine the current power P of the compressor. 1 t Has the maximum power P been reached? 1 max ;

[0117] S702, Determine P 1 t >P 1 min Whether it is true or false; that is, to determine the current power P of the compressor. 1 t Is it below the minimum power P? 1 min ;

[0118] If so, proceed to step S703.

[0119] S703, P 1 t =P 1 t-1 -ΔP2, that is, when the compressor's current power is not lower than the minimum power and the power supply power decreases, the compressor's current power P is reduced by the second magnitude ΔP2. 1 t The system will then continue to determine whether the compressor's current power has reached the preset maximum power, and to detect changes in the power supply output.

[0120] If not, proceed to step S704;

[0121] S704, switch to the battery to power the compressor, that is, when the current power of the compressor is lower than the minimum power, switch to the battery to power the compressor.

[0122] After connecting to an external power source, the compressor and refrigerator start at minimum power. The system detects the initial power supply voltage; once it's sufficient for normal refrigerator operation, the compressor's operating power is increased. The system also monitors the power supply output to detect any fluctuations caused by the increased compressor power. If the power supply output decreases, the compressor's operating power is gradually reduced. When the compressor's current power falls below the minimum required power, the system switches to battery power. By adjusting the refrigerator's power, the system operates at the minimum permissible power level when powered by the battery, preventing insufficient battery energy utilization. This achieves adaptive power control of the refrigerator under DC power supply, maximizing the utilization of DC power energy.

[0123] Example 3

[0124] In another embodiment of the present invention, the refrigerator includes at least one storage compartment;

[0125] The controller is also used for:

[0126] After keeping the compressor running at the aforementioned maximum power, monitor the temperature of the storage compartment;

[0127] When the temperature of each storage compartment is detected to be no higher than the corresponding set operating temperature of that storage compartment, and the temperature change of each storage compartment within a preset time period is less than a preset range, the defrosting function is activated.

[0128] In the specific implementation of this embodiment, please refer to Figure 6 A refrigerator includes at least one storage compartment. Specifically, a refrigerator generally includes a refrigerator compartment 602 for refrigeration and a freezer compartment 603 for freezing.

[0129] In practical implementation, when the compressor operates at its highest power under external power supply, it indicates that the external power supply can fully support the refrigerator's refrigeration operation. At this time, the controller detects the temperature changes in each storage compartment inside the refrigerator. Specifically:

[0130] When the temperature of each storage compartment is detected to be no higher than the corresponding set operating temperature, i.e., the refrigerator compartment reaches the preset operating temperature of 4 degrees Celsius and the freezer compartment reaches the preset -10 degrees Celsius, it indicates that the refrigerator has achieved the ideal refrigeration effect. Furthermore, when the temperature change of each storage compartment within a preset time period is less than the preset range, i.e., the temperature of the refrigerator compartment does not change within 15 minutes and the temperature of the freezer compartment does not change within 15 minutes, it is determined that the refrigerator has reached the optimal working state. Continuing to work cannot optimize the refrigerator's cooling effect. At this time, the defrosting function is activated, and the surplus external power supply is used for defrosting to improve energy utilization.

[0131] Example 4

[0132] In another embodiment of the present invention, the refrigerator further includes a defrosting heater;

[0133] The controller is also used for:

[0134] When the defrosting function is activated, the defrosting heater is started with the preset minimum defrosting power as the current defrosting power. The power supply power is monitored for changes and it is determined whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power.

[0135] When the current defrosting power of the defrosting heater has not reached the preset maximum defrosting power and the power supply power has not decreased, the current defrosting power of the defrosting heater is increased by a preset third value to determine whether the current defrosting power of the defrosting heater has reached the maximum defrosting power, and the power supply power change is re-detected.

[0136] When the current defrosting power of the defrosting heater reaches the maximum defrosting power, the defrosting heater is kept running at the maximum defrosting power.

[0137] In the specific implementation of this embodiment, please refer to Figure 6 The refrigerator also includes a defrost heater 604; the defrost heater is used to heat and defrost the frost layer on the evaporator after the defrost function is started.

[0138] When the controller is in operation, please refer to... Figure 8 This is a schematic diagram of the control flow of the controller provided by the present invention in the fourth embodiment;

[0139] S801, activate the defrosting function at the lowest defrosting power P. 2 0 as P 2 t When the defrosting heater is activated, i.e., when the defrosting function is started, the defrosting heater is activated using the preset minimum defrosting power as the current defrosting power.

[0140] S802, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after starting the defrosting heater and determine whether the power supply of the power supply has decreased before and after starting the defrosting heater.

[0141] If not, it indicates that the power supply of the power supply before and after the defrosting heater is started has not decreased, and step S803 is executed;

[0142] S803, determine P 2 t <P 2 max Whether it is true or false; that is, to determine the current defrosting power P of the defrosting heater. 2 t Has the maximum defrosting power P been reached? 2 max ;

[0143] If so, proceed to step S804.

[0144] If not, proceed to step S805;

[0145] S804, P 2 t =P 2 t-1 +ΔP3, and jump to S802; that is, when the current defrosting power of the defrosting heater has not reached the maximum defrosting power and the power supply power has not decreased, the current defrosting power of the defrosting heater is increased by the third amplitude, and then the judgment of whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power and the change of the power supply power are continued.

[0146] S805, maintains the defrost heater at maximum defrost power P 2 max Operation means that when the current defrosting power of the defrosting heater reaches the maximum defrosting power, the defrosting heater is kept running at the maximum defrosting power.

[0147] It should be noted that, in this embodiment, the detection and judgment process of the power supply power can also be carried out by detecting the voltage of the power supply. That is, after increasing the current defrosting power of the defrosting heater by a preset first amplitude, it is determined whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power, and the change of the power supply voltage is detected. Subsequently, the adaptive process is controlled according to the change of the power supply voltage.

[0148] In this embodiment, the minimum defrosting power is not higher than the maximum defrosting power. The minimum defrosting power should be set to the minimum power allowed by the refrigerator defrosting heater. The maximum defrosting power can be set to the rated power or the maximum allowed power of the refrigerator defrosting heater.

[0149] After connecting to an external power supply and activating the defrost function, if the power supply output does not decrease before and after the defrost heater starts, the operating power of the defrost heater is increased. The system then detects whether the power supply output changes, i.e., whether the power supply fluctuates due to the increased power of the defrost heater. If the power supply output does not decrease, the operating power of the defrost heater is gradually increased until it reaches the preset maximum defrost power and is maintained at this power. This achieves adaptive power control of the refrigerator under DC power supply, maximizing the utilization of DC power energy.

[0150] Example 5

[0151] In yet another embodiment of the present invention, the controller is further configured to:

[0152] When the power supply power decreases, the current defrosting power of the defrosting heater is reduced by the preset fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the preset minimum defrosting power.

[0153] When the power supply power decreases and the current defrosting power of the defrosting heater is not lower than the minimum power, the current defrosting power of the defrosting heater is reduced by the fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the minimum defrosting power.

[0154] When the current defrosting power of the defrosting heater is lower than the minimum defrosting power, the defrosting function is turned off.

[0155] In the specific implementation of this embodiment, please refer to Figure 9 This is a schematic diagram of the control flow of the controller in the fifth embodiment of the present invention; the controller performs the following steps during specific operation:

[0156] S901, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after adjusting the current defrosting power of the defrosting heater, and determine whether the power supply of the power supply has decreased before and after adjusting the current defrosting power of the defrosting heater. This step corresponds to step S801 in the previous embodiment.

[0157] If so, it indicates that the power supply of the defrosting heater has decreased before and after the current defrosting power adjustment, and step S902 is executed;

[0158] If not, then step S803 in the previous embodiment is executed, that is, determining P. 2 t <P 2 max Whether it is true or false; that is, to determine the current defrosting power P of the defrosting heater. 2 t Has the maximum defrosting power P been reached? 2 max ;

[0159] S902, determine P 2 t >P 2 min Whether it is true or false; that is, to determine the current defrosting power P of the defrosting heater. 2 t Is it below the minimum defrosting power P? 2 min ;

[0160] If so, proceed to step S903.

[0161] If not, proceed to step S904;

[0162] S903, P 2 t =P 2 t-1 -ΔP4, that is, when the current defrosting power of the defrosting heater is not lower than the minimum defrosting power, and the power supply power is reduced, the current defrosting power P of the defrosting heater is reduced by the fourth amplitude ΔP4. 2 t The subsequent steps include determining whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power, and detecting changes in the power supply power.

[0163] S904, Defrosting function is turned off, that is, when the current defrosting power of the defrosting heater is lower than the minimum defrosting power, the defrosting function is turned off and the defrosting heater is turned off.

[0164] When the power supply power decreases, the operation of the defrost heater is gradually reduced. When the current defrost power of the defrost heater is lower than the minimum defrost power, the defrost function is turned off to avoid the defrost function affecting the refrigerator's cooling function, thereby maximizing the utilization of DC power supply energy while ensuring normal cooling operation.

[0165] Example 6

[0166] In yet another embodiment of the present invention, the controller is further configured to:

[0167] When the detected initial voltage is lower than the rated supply voltage, the power supply power is detected.

[0168] When the power supply is lower than the preset rated power supply but higher than the preset rated standby power, the current working status of the refrigerator is detected.

[0169] When the refrigerator is in standby mode, it is powered by an external DC power supply.

[0170] When the refrigerator is in normal operation, it is powered by a storage battery.

[0171] In the specific implementation of this embodiment, participants Figure 10 This is a schematic diagram of the control flow of the controller provided by the present invention in the sixth embodiment;

[0172] S1001, Detect the initial voltage V0 of the power supply. This step corresponds to step S504 in Embodiment 1.

[0173] S1002, determine if V0 < V T Whether it is true or false, that is, whether the initial voltage V0 is lower than the rated supply voltage V. T This step corresponds to step S505 in Embodiment 1.

[0174] If not, proceed to step S506 in Embodiment 1, that is, when the detected initial voltage is not lower than the preset rated supply voltage, proceed to the next step of power adaptive control.

[0175] If so, proceed to step S1003;

[0176] S1003, detects the power supply output of the power source;

[0177] S1004, determine whether the power supply power is lower than the preset rated power and higher than the preset rated standby power;

[0178] If so, proceed to step S1005;

[0179] S1005, Determine if the refrigerator is in standby mode;

[0180] If so, proceed to step S1006;

[0181] If not, proceed to step S1007;

[0182] S1006 is powered by an external DC power supply;

[0183] The S1007 is powered by a storage battery.

[0184] It should be noted that the rated power supply is not lower than the rated standby power.

[0185] When the power supply is lower than the preset rated power but higher than the preset rated standby power, the system switches to photovoltaic power during standby. This allows for full utilization of external charging communication to maintain the refrigerator's standby state and improves the energy efficiency of the external power source.

[0186] Example 7

[0187] In yet another embodiment of the present invention, the controller is further configured to:

[0188] When the power supply power is lower than the rated standby power, a storage battery is used for power supply;

[0189] When powered by a storage battery, the compressor is controlled to operate at the preset maximum operating temperature as the maintenance temperature of the refrigerator's storage compartment.

[0190] In the specific implementation of this embodiment, after detecting the power supply power, if the power supply power is lower than the rated standby power, it indicates that the power supply cannot maintain the refrigerator's standby when using battery power. At this time, the external photovoltaic power supply cannot support the refrigerator's operation, and battery power is used.

[0191] It should be noted that when using battery power, the compressor operation is controlled by using the preset maximum operating temperature as the maintenance temperature of the refrigerator compartment. This maintains the refrigerator system's cooling at the maximum operating temperature of the refrigerator compartment, reducing battery energy consumption.

[0192] Example 8

[0193] In yet another embodiment of the present invention, the controller is further configured to:

[0194] After the defrosting heater is running at the highest defrosting power, the battery is charged with the preset minimum charging power as the current charging power. The change in the power supply power is detected, and it is determined whether the current charging power of the battery has reached the preset maximum charging power.

[0195] When the current charging power of the battery has not reached the preset maximum charging power and the power supply power has not decreased, the current charging power of the battery is increased by a preset fifth amplitude, it is determined whether the current charging power of the battery has reached the maximum charging power, and the power supply power change is re-detected.

[0196] When the current charging power of the battery reaches the maximum charging power, the battery is kept running at the maximum charging power until the battery is fully charged.

[0197] In the specific implementation of this embodiment, the controller, during its actual operation, refers to... Figure 11This is a schematic diagram of the control flow of the controller provided by the present invention in the eighth embodiment;

[0198] S1101, after maintaining the defrosting heater at the highest defrosting power, operate at the lowest charging power P. 3 0 as P 3 t Charge the battery;

[0199] S1102, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after starting the charging of the battery, and determine whether the power supply of the power supply has decreased before and after starting the charging of the battery.

[0200] If not, it indicates that the power supply of the power supply did not decrease before and after the battery started charging, and step S1103 is executed;

[0201] S1103, determine P 3 t <P 3 max Whether it is true or false; that is, to determine the current charging power P of the battery. 3 t Has the maximum charging power P been reached? 3 max ;

[0202] If so, proceed to step S1104.

[0203] If not, proceed to step S1105;

[0204] S1104, P 3 t =P 3 t-1 +ΔP5, and jump to S1102; that is, when the current charging power of the battery has not reached the maximum charging power and the power supply power has not decreased, the current charging power of the battery is increased by the fifth amplitude, and then the judgment of whether the current charging power of the battery has reached the preset maximum charging power and the change of the power supply power are continued.

[0205] S1105, maintains the battery at maximum charging power P 3 max Charging means that when the current charging power of the battery reaches the maximum charging power, the battery is kept charging at the maximum charging power until the battery is fully charged.

[0206] It should be noted that, in this embodiment, the detection and judgment process of the power supply power can also be performed by detecting the voltage of the power supply power. That is, after increasing the current charging power of the battery by a preset fifth amplitude, it is determined whether the current charging power of the battery has reached the preset maximum charging power, and the change of the power supply voltage is detected. Subsequently, the adaptive process is controlled according to the change of the power supply voltage.

[0207] In this embodiment, the minimum charging power is not higher than the maximum charging power. The minimum charging power should be set to the minimum power allowed by the refrigerator battery. The maximum charging power can be set to the rated charging power or the maximum allowed charging power of the battery.

[0208] After connecting to an external power supply and activating the defrosting function, the battery is charged when the defrosting function is running at full load. If the power supply power does not decrease before and after the battery is charged, the charging power of the battery is increased, and the power supply power is checked for changes, i.e., whether the power supply power fluctuates due to the increase in battery charging power. If the power supply power does not decrease, the charging power of the battery is gradually increased until the battery reaches the preset maximum charging power and this power is maintained to charge the battery and maximize the utilization of DC power supply energy.

[0209] Example 9

[0210] In yet another embodiment of the present invention, the controller is further configured to:

[0211] When the charging power of the power supply decreases, the current charging power of the battery is reduced by the preset sixth amplitude value, the change of the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the preset minimum charging power.

[0212] When the charging power of the power supply decreases and the current charging power of the battery is not lower than the minimum power, the current charging power of the battery is reduced by the sixth amplitude, the change in the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the minimum charging power.

[0213] When the current charging power of the battery is lower than the minimum charging power, charging of the battery is stopped.

[0214] In the specific implementation of this embodiment, please refer to... Figure 12 This is a schematic diagram of the control flow of the controller in the ninth embodiment of the present invention; the controller performs the following steps during specific operation:

[0215] S1201, determine whether the power supply of the power supply has decreased, that is, detect the power supply of the power supply before and after adjusting the current charging power of the battery, and determine whether the power supply of the power supply has decreased before and after adjusting the current charging power of the battery. This step corresponds to step S1102 in the previous embodiment.

[0216] If so, it indicates that the power supply power of the power supply before and after the current charging power of the battery is adjusted is reduced, and step S1202 is executed.

[0217] If not, then step S1203 in the previous embodiment is executed, that is, determining P. 3 t <P 3 max Whether it is true or false; that is, to determine the current charging power P of the battery. 3 t Has the maximum charging power P been reached? 3 max ;

[0218] S1202, determine P 3 t >P 3 min Whether it is true or false; that is, to determine the current charging power P of the battery. 3 t Is it below the minimum charging power P? 3 min ;

[0219] If so, proceed to step S1203.

[0220] If not, proceed to step S1204;

[0221] S1203, P 3 t =P 3 t-1 -ΔP6, that is, when the current charging power of the battery is not lower than the minimum charging power, and the power supply power is reduced, the current charging power P of the battery is reduced by the sixth amplitude ΔP6. 3 t The system will then continue to determine whether the current charging power of the battery has reached the preset maximum charging power, and to detect changes in the power supply power.

[0222] S1204, Stop charging the battery, that is, stop charging the battery when the current charging power of the battery is lower than the minimum charging power.

[0223] When the power supply output decreases, the battery's operating power is gradually reduced. Charging stops when the battery's current charging power falls below the minimum charging power. This is to prevent the defrosting function from affecting the refrigerator's cooling function, maximizing the utilization of DC power while ensuring normal cooling operation.

[0224] Example 10

[0225] Another embodiment of the present invention provides a refrigerator power adaptive power supply control method, wherein the method:

[0226] When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected.

[0227] When the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected.

[0228] When the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude to determine whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected.

[0229] When the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power.

[0230] After connecting to an external power source, the compressor and refrigerator start at minimum power. By detecting the initial voltage, and ensuring it's sufficient for normal refrigerator operation, the compressor's operating power is increased. The power supply's output is monitored for fluctuations caused by the increased compressor power. If the power supply output remains constant, the compressor's operation is gradually increased until it reaches a preset maximum power and is maintained at that power. By adjusting the refrigerator's power, when sufficient photovoltaic power is available, the refrigerator can operate at high power to deeply cool compartments without temperature limits, such as the freezer or cold storage compartments, to store cold energy and fully utilize photovoltaic energy. This achieves adaptive power control of the refrigerator under DC power supply, maximizing the utilization of DC power energy.

[0231] It should be noted that the refrigerator power adaptive power supply control method provided in this embodiment of the invention has the same process steps as the refrigerator controller in the above embodiment, see [link to relevant documentation]. Figure 4 The working principles and beneficial effects of the two correspond one-to-one; see the detailed workflow diagram below. Figures 5-12 Therefore, I will not elaborate further.

[0232] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0233] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that, include: Controller, used for: When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected. When the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected. When the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude to determine whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected. When the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power. The refrigerator also includes a storage battery; The controller is also used for: When the power supply power decreases, the compressor's current power is reduced by a preset second amplitude, the power supply power change is re-detected, and it is determined whether the compressor's current power is lower than the preset minimum power. When the power supply power decreases and the current power of the compressor is not lower than the minimum power, the current power of the compressor is reduced by the second amplitude, the power supply power change is detected again, and it is determined whether the current power of the compressor is lower than the minimum power. When the compressor's current power is lower than the minimum power, the power supply to the compressor is switched to the battery.

2. The refrigerator as described in claim 1, characterized in that, The refrigerator includes at least one storage compartment; The controller is also used for: After keeping the compressor running at the aforementioned maximum power, monitor the temperature of the storage compartment; When the temperature of each storage compartment is detected to be no higher than the corresponding set operating temperature of that storage compartment, and the temperature change of each storage compartment within a preset time period is less than a preset range, the defrosting function is activated.

3. The refrigerator as described in claim 1, characterized in that, The refrigerator also includes a defrosting heater; The controller is also used for: When the defrosting function is activated, the defrosting heater is started with the preset minimum defrosting power as the current defrosting power. The power supply power is monitored for changes and it is determined whether the current defrosting power of the defrosting heater has reached the preset maximum defrosting power. When the current defrosting power of the defrosting heater has not reached the preset maximum defrosting power and the power supply power has not decreased, the current defrosting power of the defrosting heater is increased by a preset third value to determine whether the current defrosting power of the defrosting heater has reached the maximum defrosting power, and the power supply power change is re-detected. When the current defrosting power of the defrosting heater reaches the maximum defrosting power, the defrosting heater is kept running at the maximum defrosting power.

4. The refrigerator as described in claim 3, characterized in that, The controller is also used for: When the power supply power decreases, the current defrosting power of the defrosting heater is reduced by the preset fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the preset minimum defrosting power. When the power supply power decreases and the current defrosting power of the defrosting heater is not lower than the minimum power, the current defrosting power of the defrosting heater is reduced by the fourth amplitude, the power supply power change is re-detected, and it is determined whether the current defrosting power of the defrosting heater is lower than the minimum defrosting power. When the current defrosting power of the defrosting heater is lower than the minimum defrosting power, the defrosting function is turned off.

5. The refrigerator as described in claim 1, characterized in that, The controller is also used for: When the detected initial voltage is lower than the rated supply voltage, the power supply power is detected. When the power supply is lower than the preset rated power supply but higher than the preset rated standby power, the current working status of the refrigerator is detected. When the refrigerator is in standby mode, it is powered by an external DC power supply. When the refrigerator is in normal operation, it is powered by a storage battery.

6. The refrigerator as described in claim 5, characterized in that, The controller is also used for: When the power supply power is lower than the rated standby power, a storage battery is used for power supply; When powered by a storage battery, the compressor is controlled to operate at the preset maximum operating temperature as the maintenance temperature of the refrigerator's storage compartment.

7. The refrigerator as described in claim 3, characterized in that, The refrigerator also includes a storage battery; The controller is also used for: After the defrosting heater is running at the highest defrosting power, the battery is charged with the preset minimum charging power as the current charging power. The change in the power supply power is detected, and it is determined whether the current charging power of the battery has reached the preset maximum charging power. When the current charging power of the battery has not reached the preset maximum charging power and the power supply power has not decreased, the current charging power of the battery is increased by a preset fifth amplitude, it is determined whether the current charging power of the battery has reached the maximum charging power, and the power supply power change is re-detected. When the current charging power of the battery reaches the maximum charging power, the battery is kept running at the maximum charging power until the battery is fully charged.

8. The refrigerator as described in claim 7, characterized in that, The controller is also used for: When the charging power of the power supply decreases, the current charging power of the battery is reduced by the preset sixth amplitude value, the change of the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the preset minimum charging power. When the charging power of the power supply decreases and the current charging power of the battery is not lower than the minimum power, the current charging power of the battery is reduced by the sixth amplitude, the change in the charging power of the power supply is re-detected, and it is determined whether the current charging power of the battery is lower than the minimum charging power. When the current charging power of the battery is lower than the minimum charging power, charging of the battery is stopped.

9. A refrigerator power adaptive power supply control method, characterized in that, The method described: When an external DC power supply is detected, the compressor is started with the preset minimum power as the current power, and the initial voltage of the power supply is detected. When the detected initial voltage is not lower than the preset rated power supply voltage, the current power of the compressor is increased by a preset first amplitude based on the minimum power, it is determined whether the current power of the compressor has reached the preset maximum power, and the change of the power supply power of the power supply is detected. When the current power of the compressor has not reached the maximum power and the power supply power has not decreased, the current power of the compressor is increased by the first amplitude to determine whether the current power of the compressor has reached the preset maximum power, and the power supply power change is re-detected. When the compressor's current power reaches the maximum power, the compressor is kept running at the maximum power. The method further includes: When the power supply power decreases, the compressor's current power is reduced by a preset second amplitude, the power supply power change is re-detected, and it is determined whether the compressor's current power is lower than the preset minimum power. When the power supply power decreases and the current power of the compressor is not lower than the minimum power, the current power of the compressor is reduced by the second amplitude, the power supply power change is detected again, and it is determined whether the current power of the compressor is lower than the minimum power. When the compressor's current power is lower than the minimum power, the power supply to the compressor is switched to the battery.

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