Phase-change energy-storage full-temperature-range intelligent electric cooker and control method

Abstract

The invention discloses a phase-change energy storage full-temperature-range intelligent electric cooker. The electric cooker comprises a cooker body; a refrigeration system; a heating system; a circulation system; a heat and cold storage unit; the cold end of the lateral refrigeration sheet exchanges heat with the outer pot, and the cold end of the bottom refrigeration sheet exchanges heat with the liquid storage tank; and the control system is electrically connected with the heating system, the refrigerating system and the circulating system, and is used for controlling the working states of the heating disc, the semiconductor refrigerating sheet, the circulating pump and the electromagnetic valve according to temperature sampling signals. The invention further provides a control method. According to the phase-change energy-storage full-temperature-range intelligent electric cooker provided by the invention, the lateral refrigeration sheet is matched with the bottom refrigeration sheet, so that the outer pot and the liquid storage tank respectively participate in heat exchange, and the response speed and uniformity of cooling and heating are improved; and the phase-change material is used for absorbing and releasing residual cold or residual heat, so that the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a phase change energy storage full-temperature-range intelligent rice cooker and its control method. Background Technology

[0002] Current rice cookers are mainly used for cooking rice and porridge, and keeping warm. They typically lack temperature control capabilities such as refrigeration, freezing, sous-vide cooking, and alternating hot and cold cooking. While refrigerators and other appliances can provide a low-temperature environment, their separate configuration from rice cookers increases space requirements, operating costs, and operational complexity. Furthermore, when switching between freezing / refrigeration and heating within the same appliance, the lack of temperature feedback, interlocking control, and energy buffering can easily lead to large temperature fluctuations, high energy consumption, and component overload. Therefore, there is a need for a rice cooker that can achieve heating, cooling, and multi-mode temperature control within a single appliance, while also being more energy efficient and offering safer and more reliable control. Summary of the Invention

[0003] To address the aforementioned issues, this technical solution provides a phase-change energy storage full-temperature-range intelligent rice cooker and its control method.

[0004] To achieve the above objectives, the technical solution is as follows: A phase-change energy storage smart rice cooker with a full temperature range includes: The body includes an outer shell, an outer pot disposed within the outer shell, an inner pot disposed within the outer pot, and a cover disposed on the outer shell; A refrigeration system, comprising a semiconductor refrigeration chip, the semiconductor refrigeration chip comprising at least a lateral refrigeration chip disposed on the side of the outer pot and a bottom refrigeration chip disposed on the bottom of the outer pot; A heating system, comprising a heating plate disposed at the bottom of the inner pot or on the outer periphery of the inner pot to heat the inner pot; A circulation system includes a liquid storage tank, a circulation pump, a solenoid valve, an evaporator, and a circulation pipeline. The evaporator is arranged around the outer pot and exchanges heat with the outer pot. The circulation pipeline contains a heat transfer medium to circulate between the liquid storage tank and the evaporator. A thermal and cold storage unit includes a phase change material, which is filled in the liquid storage tank. One side of the liquid storage tank exchanges heat with the bottom cooling plate, and the other side exchanges heat with the heating plate. The cold end of the lateral cooling element exchanges heat with the outer pot, and the cold end of the bottom cooling element exchanges heat with the liquid storage tank. The control system is electrically connected to the heating system, the cooling system, and the circulation system, and is used to control the operating status of the heating plate, the thermoelectric cooler, the circulation pump, and the solenoid valve based on the temperature sampling signal.

[0005] As described above, in a phase change energy storage full-temperature range smart rice cooker, the outer side of the liquid storage tank is covered with heat insulation material to form a heat and cold storage interlayer, wherein the heat insulation material is one or more of polyurethane foam, aerogel felt or vacuum insulation board.

[0006] The phase change energy storage full-temperature range smart rice cooker described above includes a control system comprising an MCU main control circuit board, and an inner pot bottom temperature sensor, an inner pot side wall temperature sensor, a semiconductor cooling chip temperature sensor, and a liquid storage tank temperature sensor, all electrically connected to the MCU main control circuit board.

[0007] As described above, in a phase change energy storage full-temperature-range smart rice cooker, the control system controls the heating plate to be energized and heated in heating mode, and controls the semiconductor cooling chip to be energized in reverse so that the lateral cooling chip supplies heat to the outer pot to form three-dimensional heating of the bottom and sides. During three-dimensional heating, the control system controls the circulation pump and the solenoid valve to open so that the heat transfer medium supplies heat to the outer pot through the evaporator.

[0008] As described above, a phase change energy storage full-temperature-range smart rice cooker includes a freezing mode. In freezing mode, the control system controls the semiconductor cooling chip to be forward-energized so that the lateral cooling chip absorbs heat from the outer pot to freeze and cool the inner pot. It also controls the bottom cooling chip to cool the liquid storage tank so that the phase change material stores cold and exchanges heat with the heating plate to assist in cooling the bottom of the inner pot. In freezing mode, the system also controls the circulation pump to be turned off and the solenoid valve to be in a closed state.

[0009] As described above, a phase change energy storage full-temperature-range smart rice cooker includes a refrigeration mode. In refrigeration mode, the control system controls the semiconductor cooling chip to be forward-energized, causing the lateral cooling chip to absorb heat from the outer pot to cool the inner pot. It also controls the bottom cooling chip to cool the liquid storage tank, allowing the phase change material to store cold and exchange heat with the heating plate to assist in cooling the bottom of the inner pot. In refrigeration mode, the system also controls the circulation pump to start and the solenoid valve to open, allowing the heat transfer medium to perform three-dimensional cooling of the outer pot via the evaporator.

[0010] The phase change energy storage full-temperature range smart rice cooker described above also includes a semiconductor power supply module, which is an independent DC power supply module and has step-down conversion and current limiting functions to drive the semiconductor cooling chip.

[0011] In the phase change energy storage full-temperature range smart rice cooker described above, when the control system performs interlock control, the heating plate is prohibited from being powered on and heated when the semiconductor refrigeration chip is powered on for cooling, and the semiconductor refrigeration chip is prohibited from being powered on and cooled when the heating plate is powered on for heating.

[0012] This application also provides a control method applied to a phase change energy storage full-temperature-range smart rice cooker as described above, comprising the following steps: The control system maintains interlock control during the following steps; S1: Obtain the target functional mode, target temperature, and / or target time; S2: Collect the temperature of the bottom of the inner pot, the temperature of the side wall of the inner pot, the temperature of the semiconductor cooling chip, and the temperature of the liquid storage tank; S3: When the target function mode is heating mode, control the heating plate to be powered on, and adjust the heating power according to the temperature of the bottom of the inner pot and the temperature of the side wall of the inner pot; S4: When the target function mode is cooling mode, control the semiconductor cooling chip to be powered on in the forward direction, and adjust the cooling power according to the temperature of the bottom of the inner pot and the temperature of the liquid storage tank; S5: When the target function mode is the refrigeration mode, control the semiconductor cooling chip to be energized in the forward direction and turn on the circulation pump and the solenoid valve so that the heat transfer medium can perform three-dimensional cooling on the outer pot through the evaporator.

[0013] The control method described above, wherein the target functional mode includes at least one or more of the following: low-temperature slow cooking, yogurt making, automatic defrosting, porridge and soup cooking, long-term heat preservation, constant temperature refrigeration, cold rice preparation, alternating hot and cold cooking, and water bath temperature control, wherein: Slow cooking at low temperatures: The control system maintains the temperature of the inner pot between 50°C and 80°C. Yogurt making: The control system performs constant temperature fermentation according to the preset fermentation temperature, and then performs constant temperature refrigeration according to the preset refrigeration temperature after the preset fermentation time; Automatic defrosting: The control system heats or cools the system according to a preset defrosting temperature, which is greater than 0°C; Porridge and soup cooking: The control system controls the temperature of the inner pot at 95℃-100℃ and stops heating after the preset cooking time; Long-lasting heat preservation: The control system maintains the temperature of the inner pot at 60℃-70℃; Constant temperature refrigeration: The control system controls the temperature of the inner pot according to the preset refrigeration temperature; Cold rice preparation: After the cooking is completed, the rice is cooled to a preset low temperature threshold at full power and maintained for a preset time to promote rice aging; Alternating hot and cold cooking: The control system maintains the temperature of the inner pot at 65°C for constant heating, and after a preset hot and cold time, lowers the temperature to a preset cooling temperature. Water bath temperature control: The control system controls the temperature of the inner pot according to the preset temperature.

[0014] The beneficial effects of this application are: This invention provides a phase change energy storage full-temperature-range smart rice cooker. The side cooling plates and bottom cooling plates work together to allow the outer pot and the liquid storage tank to participate in heat exchange separately, improving the response speed and uniformity of cooling and heating. The phase change material absorbs and releases residual cold or heat, forming an energy buffer, reducing temperature fluctuations and improving energy efficiency. In refrigeration mode, the circulation system drives the heat transfer medium to perform three-dimensional cooling of the outer pot through the evaporator, improving the uniformity of refrigeration. The control system performs interlock control to reduce the risk of conflicting operation between cooling and heating, improving safety and reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an electrical connection block diagram of the present invention. Detailed Implementation

[0017] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] A phase-change energy storage smart rice cooker with a full temperature range includes: The body includes an outer shell 1, an outer pot 2 disposed inside the outer shell 1, an inner pot 3 disposed inside the outer pot 2, and a cover 4 disposed on the outer shell 1; The refrigeration system 5 includes a semiconductor refrigeration chip 51, which includes at least a lateral refrigeration chip 511 disposed on the side of the outer pot 2 and a bottom refrigeration chip 512 disposed at the bottom of the outer pot 2. Heating system 6 includes heating plate 61, which is disposed at the bottom of inner pot 3 or on the outer periphery of inner pot 3 to heat inner pot 3; The circulation system 7 includes a liquid storage tank 71, a circulation pump 72, a solenoid valve 73, an evaporator 74, and a circulation pipeline 75. The evaporator 74 is arranged around the outer pot 2 and exchanges heat with the outer pot 2. The circulation pipeline 75 is provided with a heat transfer medium to circulate between the liquid storage tank 71 and the evaporator 74. The thermal and cold storage unit 8 includes a phase change material 81, which is filled in the liquid storage tank 71. One side of the liquid storage tank 71 exchanges heat with the bottom cooling chip 512, and the other side exchanges heat with the heating plate 61. The cold end of the lateral cooling plate 511 exchanges heat with the outer pot 2, and the cold end of the bottom cooling plate 512 exchanges heat with the liquid storage tank 71. The control system 10 is electrically connected to the heating system 6, the cooling system 5, and the circulation system 7, and is used to control the working state of the heating plate 61, the semiconductor cooling chip 51, the circulation pump 72, and the solenoid valve 73 according to the temperature sampling signal.

[0019] This invention provides a phase change energy storage full-temperature-range smart rice cooker. The side cooling plates and bottom cooling plates work together to allow the outer pot and the liquid storage tank to participate in heat exchange separately, improving the response speed and uniformity of cooling and heating. The phase change material absorbs and releases residual cold or heat, forming an energy buffer, reducing temperature fluctuations and improving energy efficiency. In refrigeration mode, the circulation system drives the heat transfer medium to perform three-dimensional cooling of the outer pot through the evaporator, improving the uniformity of refrigeration. The control system performs interlock control to reduce the risk of conflicting operation between cooling and heating, improving safety and reliability.

[0020] By combining zoned heat exchange, circulating heat exchange, and phase change energy storage between the side cooling plates and the bottom cooling plates, the rice cooker achieves full-temperature control of heating, freezing, refrigeration, and three-dimensional heat exchange within the same device. Furthermore, the closed-loop regulation of the control system improves temperature uniformity and response speed while reducing energy consumption fluctuations.

[0021] Furthermore, as a preferred embodiment of this solution and not a limitation, the outer side of the liquid storage tank 71 is covered with a heat insulation material 82 to form a heat and cold storage interlayer. The heat insulation material 82 is one or more of polyurethane foam, aerogel felt, or vacuum insulation board. By insulating the liquid storage tank, ineffective heat exchange between the heat and cold storage unit and the outside environment is reduced, improving the energy storage and retention capacity of the phase change material, thereby reducing the cooling or heating power required to maintain the target temperature range.

[0022] Furthermore, as a preferred embodiment of this solution and not a limitation, the control system 10 includes an MCU main control circuit board 101, and an inner pot bottom temperature sensor 102, an inner pot side wall temperature sensor 103, a semiconductor cooling chip temperature sensor 104, and a liquid storage tank temperature sensor 105, all electrically connected to the MCU main control circuit board 101. Through multi-point temperature sampling, real-time monitoring of the pot's temperature field, the cooling chip's operating condition, and the liquid storage tank's energy storage status is achieved, providing a basis for power adjustment, mode switching, and protection strategies, thereby improving temperature control accuracy, uniformity, and operational reliability.

[0023] Furthermore, as a preferred embodiment of this solution and not a limitation, the control system 10 controls the heating plate 61 to be energized and heated in heating mode, and controls the semiconductor cooling chip 51 to be energized in reverse so that the lateral cooling chip 511 supplies heat to the outer pot 2 to form three-dimensional heating from the bottom and sides. During three-dimensional heating, the control system 10 controls the circulation pump 72 and the solenoid valve 73 to open, allowing the heat transfer medium to supply heat to the outer pot 2 via the evaporator 74. Through the superposition of bottom heating of the heating plate, lateral heating, and heat exchange of the circulating medium, three-dimensional heating is achieved, increasing the heating rate and improving the uniformity of temperature distribution inside the pot, thereby shortening cooking time and reducing the risk of burning or localized overheating.

[0024] Furthermore, as a preferred embodiment of this solution and not a limitation, the control system 10 includes a freezing mode. In freezing mode, the control system 10 controls the semiconductor cooling chip 51 to be forward-energized, causing the lateral cooling chip 511 to absorb heat from the outer pot 2 to freeze and cool the inner pot 3. It also controls the bottom cooling chip 512 to cool the liquid storage tank 71, allowing the phase change material 81 to store cold and exchange heat with the heating plate 61 to assist in cooling the bottom of the inner pot 3. In freezing mode, the circulation pump 72 is shut off, and the solenoid valve 73 is closed. By combining lateral direct cooling with bottom-stored auxiliary cooling, the freezing and cooling rate is improved, and the bottom cooling capacity is enhanced. Simultaneously, shutting down the circulation reduces energy consumption and system complexity, making the freezing process more efficient and stable.

[0025] Furthermore, as a preferred embodiment of this solution and not a limitation, the control system 10 includes a refrigeration mode. In this mode, the control system 10 controls the semiconductor cooling chip 51 to be forward-energized, causing the lateral cooling chip 511 to absorb heat from the outer pot 2 to cool the inner pot 3. It also controls the bottom cooling chip 512 to cool the liquid storage tank 71, allowing the phase change material 81 to store cold and exchange heat with the heating plate 61 to assist in cooling the bottom of the inner pot 3. Additionally, in this mode, the circulation pump 72 is activated, and the solenoid valve 73 is opened, allowing the heat transfer medium to achieve three-dimensional cooling of the outer pot 2 via the evaporator 74. This three-dimensional cooling of the outer pot is achieved through a circulation system, reducing the temperature gradient in the refrigeration field and improving temperature uniformity. Combined with bottom-level cold storage and auxiliary cooling, temperature fluctuations are reduced, and the stability of constant-temperature refrigeration is improved.

[0026] Furthermore, as a preferred embodiment of this solution and not a limitation, it also includes a semiconductor power supply module 11. The semiconductor power supply module 11 is an independent DC power supply module with buck conversion and current limiting functions to drive the thermoelectric cooler 51. Through independent DC power supply and current limiting control, the power supply stability of the thermoelectric cooler is improved, and the risks of startup shock and overcurrent are reduced, thereby improving the reliability and safety of the cooling system.

[0027] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the semiconductor cooling chip 51 is provided with a heat sink 12 and / or a cooling fan 13.

[0028] Furthermore, as a preferred embodiment of this solution and not a limitation, when the control system 10 performs interlock control, the heating plate 61 is prohibited from being energized for heating when the thermoelectric cooler 51 is energized for cooling, and the thermoelectric cooler 51 is prohibited from being energized for cooling when the heating plate 61 is energized for heating. By interlocking cooling and heating, energy waste, device overload, and temperature control conflicts caused by both operating at high power simultaneously are avoided, thereby improving system stability and extending the life of key components.

[0029] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the heat transfer medium is one of ethylene glycol aqueous solution, propylene glycol aqueous solution or silicone oil, and the circulation pipeline 75 is provided with an exhaust structure and a liquid replenishment port to reduce air resistance and facilitate maintenance.

[0030] The control method, applied to a phase change energy storage full-temperature-range smart rice cooker as described above, includes the following steps: The control system 10 maintains interlock control during the following steps; S1: Obtain the target functional mode, target temperature, and / or target time; S2: Collect the temperature of the bottom of the inner pot, the temperature of the side wall of the inner pot, the temperature of the semiconductor cooling chip, and the temperature of the liquid storage tank; S3: When the target function mode is heating mode, control the heating plate 61 to be powered on, and adjust the heating power according to the bottom temperature of the inner pot 3 and the side wall temperature of the inner pot 3. S4: When the target function mode is cooling mode, control the semiconductor cooling chip 51 to be powered on in the forward direction, and adjust the cooling power according to the temperature of the bottom of the inner pot 3 and the temperature of the liquid storage tank 71. S5: When the target function mode is the refrigeration mode, control the semiconductor cooling chip 51 to be energized in the forward direction and turn on the circulation pump 72 and the solenoid valve 73 so that the heat transfer medium can perform three-dimensional cooling on the outer pot 2 through the evaporator 74.

[0031] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the control method, the target functional mode, includes at least one or more of the following: low-temperature slow cooking, yogurt making, automatic defrosting, porridge and soup cooking, long-term heat preservation, constant temperature refrigeration, cold rice preparation, alternating hot and cold cooking, and water bath temperature control, wherein: Low-temperature slow cooking: The control system maintains the temperature of the inner pot at 50°C-80°C; used for cooking steaks, chicken breasts, etc., keeping them tender.

[0032] Yogurt making: The control system performs constant temperature fermentation according to the preset fermentation temperature, and then performs constant temperature refrigeration according to the preset refrigeration temperature after the preset fermentation time; Automatic defrosting: The control system heats or cools the food according to a preset defrosting temperature, which is greater than 0°C; or the food is slowly defrosted at a temperature slightly higher than 0°C, such as 1°C, to reduce juice loss.

[0033] Porridge and soup cooking: The control system controls the temperature of the inner pot at 95℃-100℃ and stops heating after the preset cooking time; the heating temperature is controlled at 95-100℃, and the pot is simmered slowly at a set time to avoid overflow.

[0034] Long-lasting heat preservation: The control system maintains the temperature of the inner pot at 60℃-70℃. It maintains a constant temperature within the 60-70°C range and uses low-power heating.

[0035] Constant temperature refrigeration: The control system controls the temperature of the inner pot according to the preset refrigeration temperature; as a temporary mini-fridge, it can store food for a long time and the temperature is adjustable.

[0036] Cold rice preparation: After the cooking is completed, the system will cool down to the preset low temperature threshold at full power and maintain it for the preset time to promote the aging of the rice. After the user finishes cooking, the program will automatically or manually start "rapid cooling". The cooling system will run at full power and the temperature of the inner pot will drop rapidly to 4°C. After reaching the target temperature, it will switch to "constant temperature refrigeration" mode.

[0037] Alternating hot and cold cooking: The control system maintains the temperature of the inner pot at 65°C for constant heating, and after a preset hot and cold time, the temperature is lowered to a preset cooling temperature; for example, in the onsen egg mode, the temperature is maintained at 65°C for constant heating, and then rapidly cooled to set the shape.

[0038] Water bath temperature control: The control system controls the temperature of the inner pot according to a preset temperature. Water is added to the inner pot, the baby bottle is placed inside, and the temperature of the baby milk is adjusted by heating or cooling the water through a water bath.

[0039] The above description is only a preferred embodiment of this application and is not intended to limit the scope of implementation of this application. Any other embodiments whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A full-temperature-range intelligent electric rice cooker with phase change energy storage, characterized in that, include: The body includes an outer shell (1), an outer pot (2) disposed inside the outer shell (1), an inner pot (3) disposed inside the outer pot (2), and a cover (4) disposed on the outer shell (1). The refrigeration system (5) includes a semiconductor refrigeration chip (51), which includes at least a lateral refrigeration chip (511) disposed on the side of the outer pot (2) and a bottom refrigeration chip (512) disposed on the bottom of the outer pot (2). The heating system (6) includes a heating plate (61) which is disposed at the bottom of the inner pot (3) or on the outer periphery of the inner pot (3) to heat the inner pot (3); The circulation system (7) includes a liquid storage tank (71), a circulation pump (72), a solenoid valve (73), an evaporator (74), and a circulation pipeline (75). The evaporator (74) is arranged around the outer pot (2) and exchanges heat with the outer pot (2). The circulation pipeline (75) contains a heat transfer medium to circulate between the liquid storage tank (71) and the evaporator (74). The thermal and cold storage unit (8) includes a phase change material (81), which is filled in the liquid storage tank (71). One side of the liquid storage tank (71) exchanges heat with the bottom cooling plate (512), and the other side exchanges heat with the heating plate (61). The cold end of the lateral cooling plate (511) exchanges heat with the outer pot (2), and the cold end of the bottom cooling plate (512) exchanges heat with the liquid storage tank (71). The control system (10) is electrically connected to the heating system (6), the cooling system (5), and the circulation system (7), and is used to control the working state of the heating plate (61), the semiconductor cooling chip (51), the circulation pump (72), and the solenoid valve (73) according to the temperature sampling signal.

2. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: The liquid storage tank (71) is covered with a heat insulation material (82) to form a heat and cold storage interlayer. The heat insulation material (82) is one or more of polyurethane foam, aerogel felt or vacuum insulation board.

3. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: The control system (10) includes an MCU main control circuit board (101), and an inner pot bottom temperature sensor (102), an inner pot side wall temperature sensor (103), a semiconductor cooling chip temperature sensor (104), and a liquid storage tank temperature sensor (105) that are electrically connected to the MCU main control circuit board (101).

4. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: In heating mode, the control system (10) controls the heating plate (61) to be energized and heated, and controls the semiconductor cooling chip (51) to be energized in reverse so that the side cooling chip (511) supplies heat to the outer pot (2) to form a three-dimensional heating of the bottom and sides. In the three-dimensional heating, the control system (10) controls the circulation pump (72) and the solenoid valve (73) to be opened so that the heat transfer medium supplies heat to the outer pot (2) through the evaporator (74).

5. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: The control system (10) comprises a freezing mode, in which the control system (10) controls the semiconductor refrigeration sheet (51) to be forward energized to make the lateral refrigeration sheet (511) absorb the heat of the outer pot (2) to cool the inner pot (3), and controls the bottom refrigeration sheet (512) to refrigerate the liquid storage tank (71) to make the phase change material (81) store cold and exchange heat to the heating disc (61) to assist refrigeration of the bottom of the inner pot (3), and controls the circulating pump (72) to be closed and the electromagnetic valve (73) to be in a closed state in the freezing mode.

6. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: The control system (10) comprises a refrigeration mode, in which the control system (10) controls the semiconductor refrigeration sheet (51) to be forward energized to make the lateral refrigeration sheet (511) absorb the heat of the outer pot (2) to cool the inner pot (3), and controls the bottom refrigeration sheet (512) to refrigerate the liquid storage tank (71) to make the phase change material (81) store cold and exchange heat to the heating disc (61) to assist refrigeration of the bottom of the inner pot (3), and controls the circulating pump (72) to be opened and the electromagnetic valve (73) to be opened to make the heat transfer medium refrigerate the outer pot (2) through the evaporator (74) in the refrigeration mode.

7. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: The control system (10) further comprises a semiconductor power supply module (11), which is an independent direct current power supply module and has a step-down conversion and current limiting function to drive the semiconductor refrigeration sheet (51).

8. The full-temperature-range intelligent electric rice cooker with phase change energy storage according to claim 1, characterized in that: When the control system (10) performs interlocking control, the semiconductor refrigeration sheet (51) is prohibited from being forward energized to refrigerate when the heating disc (61) is energized to heat, and the heating disc (61) is prohibited from being energized to heat when the semiconductor refrigeration sheet (51) is forward energized to refrigerate.

9. Control method, characterized in that The application is applied to the intelligent electric rice cooker of the full-temperature-range phase change energy storage, and comprises the following steps: The control system (10) keeps performing interlocking control in the following steps: S1: obtaining a target function mode and target temperature and / or target time; S2: collecting the temperature of the bottom of the inner pot, the temperature of the side wall of the inner pot, the temperature of the semiconductor refrigeration sheet, and the temperature of the liquid storage tank; S3: when the target function mode is a heating mode, the heating disc (61) is controlled to be energized, and the heating power is adjusted according to the bottom temperature of the inner pot (3) and the side wall temperature of the inner pot (3); S4: when the target function mode is a refrigeration mode, the semiconductor refrigeration sheet (51) is controlled to be forward energized, and the refrigeration power is adjusted according to the bottom temperature of the inner pot (3) and the temperature of the liquid storage tank (71); S5: when the target function mode is a refrigeration mode, the semiconductor refrigeration sheet (51) is controlled to be forward energized, and the circulating pump (72) and the electromagnetic valve (73) are opened to make the heat transfer medium refrigerate the outer pot (2) through the evaporator (74).

10. The control method according to claim 9, characterized in that: The target function mode at least includes one or more of low-temperature slow cooking, making yogurt, automatic thawing, porridge and soup cooking, long-acting temperature keeping, constant-temperature refrigeration, cold rice making, cold and hot alternating cooking, and water bath temperature adjustment, wherein: Low-temperature slow cooking: the control system controls the temperature of the inner pot at 50°C-80°C; Making yogurt: the control system performs constant-temperature fermentation according to a preset fermentation temperature, and performs constant-temperature refrigeration according to a preset refrigeration temperature after a preset fermentation time; Automatic thawing: the control system performs heating or refrigeration according to a preset thawing temperature, which is greater than 0°C; Porridge and soup cooking: the control system controls the temperature of the inner pot at 95°C-100°C, and stops heating after a preset cooking time; Long-acting temperature keeping: the control system controls the temperature of the inner pot at 60°C-70°C; Constant-temperature refrigeration: the control system controls the temperature of the inner pot according to a preset refrigeration temperature; Cold rice making: after cooking completion determination, full-power refrigeration is performed to a preset low temperature threshold, and the preset time length is maintained to promote rice aging; Cold and hot alternating cooking: the control system controls the temperature of the inner pot at 65°C for constant-temperature heating, and after a preset cold and hot time, the temperature is decreased to a preset cooling temperature; Water bath temperature adjustment: the control system controls the temperature of the inner pot according to a preset temperature.

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