Direct current electric cooker and economical efficiency control method thereof

Abstract

The invention relates to the technical field of direct-current electric cookers, particularly provides an economical control method for a direct-current electric cooker, and aims to solve the technical problem that the taste of rice is affected by premature reservation due to the fact that an existing reservation mode is not optimal. In order to achieve the purpose, the direct-current electric cooker comprises a heat storage module, and the control method comprises the following steps that in a traditional reservation mode, a first total electricity price needed by the electric cooker to complete cooking at the preset moment is obtained; according to the economic reservation mode, the earliest starting time of the electric cooker is obtained according to the preset moment, the cooking duration and the longest heat preservation duration, the second total electricity price needed by the electric cooker for completing cooking in the valley period after the earliest starting time is obtained, and the third total electricity price needed by heat preservation of the electric cooker to the preset moment is obtained; in the heat preservation process, the heat storage module is preferentially used for releasing heat to preserve heat of the food; and determining an operation mode according to the first total electricity price, the second total electricity price and the third total electricity price. The taste of food can be ensured, and the user experience is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of DC rice cookers, and specifically provides a control method for the economy of a DC rice cooker. Background Art

[0002] Peak-valley electricity price is also called "time-of-use electricity price". It is a kind of electricity price system that calculates electricity bills separately for peak electricity consumption and valley electricity consumption. Peak electricity consumption generally refers to the electricity consumption when electricity-consuming units are relatively concentrated and the power supply is tense, such as during the day, and the charging standard is relatively high; valley electricity consumption generally refers to the electricity consumption when there are fewer electricity-consuming units and the power supply is relatively sufficient, such as at night, and the charging standard is relatively low. Implementing peak-valley electricity price is conducive to prompting electricity-consuming units to stagger their electricity consumption times and reducing the power supply pressure on the power system. Many countries implement peak-valley electricity price, and the price difference between peak and valley can reach 50%. Some places in China are also in the trial implementation.

[0003] For household appliances, when using electricity during peak hours, not only do users bear high electricity bills, but the power supply pressure on the power grid is also relatively large. In addition, based on the country's "dual carbon" goal, the structure of the power system is gradually changing, and the installed capacity of wind power and photovoltaic power is increasing continuously. And these renewable energy power generations have the characteristic of large volatility, so auxiliary regulation of power consumption and absorption is also required at the power consumption terminal, that is, using more electricity when more power is generated and using less electricity when less power is generated; therefore, DC rice cookers have emerged as the times require.

[0004] Moreover, Chinese Patent 《CN106411671B》 proposes a method and gateway for controlling smart home appliances for peak-valley electricity consumption, and sends an execution instruction for a reservation operation to smart home appliances during the low-peak electricity consumption period of the day. So that the target smart home appliance (DC rice cooker) works during the low-peak electricity consumption period as much as possible. However, if the time from the end of cooking during the valley period to the user's meal time is too long, it will affect the taste of the rice and reduce the user experience. Similarly, only considering the initial cooking without considering the electricity consumption required for subsequent heat preservation may result in more electricity bills for the reservation cooking started during the valley period than those of the traditional reservation mode.

[0005] Therefore, there is an urgent need for a control method for the economy of a DC rice cooker and the rice cooker itself to solve the above technical problems. Summary of the Invention

[0006] The present invention aims to solve the above technical problems, that is, to solve the technical problems that the existing reservation mode of rice cookers may require more electricity bills than the traditional reservation mode and is not economically optimal; in addition, making an early reservation will affect the taste of the rice and lead to poor user experience.

[0007] In a first aspect, the present invention provides a control method for the economy of a DC rice cooker. The DC rice cooker includes a heat storage module. When the rice cooker is cooking rice, the heat storage module can absorb the heat released by the inner pot and store it. When the rice cooker is keeping warm, the heat storage module can release heat to keep the food in the inner pot warm. The control method includes the following steps:

[0008] In the traditional reservation mode, obtain the first total electricity price required for the rice cooker to complete cooking until the preset time.

[0009] In the economic reservation mode, obtain the earliest start time of the rice cooker according to the preset time, cooking duration, and the longest holding time. Obtain the second total electricity price required for the rice cooker to complete cooking during the valley period after the earliest start time, and obtain the third total electricity price required for the rice cooker to keep warm until the preset time. During the warming process, give priority to using the heat released by the heat storage module to keep the food warm.

[0010] Determine the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price.

[0011] In a specific embodiment of the above control method for the economy of the DC rice cooker, "During the warming process, give priority to using the heat released by the heat storage module to keep the food warm" includes:

[0012] If the heat released by the heat storage module can meet the heat required for warming during the warming duration, only use the heat storage module to keep the food warm.

[0013] In a specific embodiment of the above control method for the economy of the DC rice cooker, "During the warming process, give priority to using the heat released by the heat storage module to keep the food warm" further includes:

[0014] If the heat released by the heat storage module cannot meet the heat required for warming during the warming duration, use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm.

[0015] In a specific embodiment of the above control method for the economy of the DC rice cooker, "Use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm" includes:

[0016] If the warming duration period includes a peak period, and the heat released by the heat storage module can meet the heat required for warming during the peak period of the warming duration, then use the heat storage module to keep the food warm during the peak period, and use the heat released by the heat storage module and / or the heating of the rice cooker to keep the food warm during other periods of the warming duration.

[0017] In the specific implementation manner of the above control method for the economy of the DC rice cooker, "using the heat released by the heat storage module to cooperate with the rice cooker heating to keep the food warm" further includes:

[0018] If the heat preservation duration period includes a peak period, and the heat released by the heat storage module cannot meet the heat required for heat preservation during the peak period within the heat preservation duration, then during the peak period, use the heat released by the heat storage module to cooperate with the rice cooker heating to keep the food warm, and use the rice cooker heating to keep the food warm during other periods within the heat preservation duration.

[0019] In the specific implementation manner of the above control method for the economy of the DC rice cooker, "determining the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price" specifically includes the steps of:

[0020] If the first total electricity price is greater than the sum of the second total electricity price and the third total electricity price, then operate in the economic reservation mode; and / or

[0021] If the first total electricity price is not greater than the sum of the second total electricity price and the third total electricity price, then operate in the traditional reservation mode.

[0022] In the specific implementation manner of the above control method for the economy of the DC rice cooker, the control method further includes the following steps:

[0023] Before performing the calculations for the economic reservation mode and the traditional reservation mode, obtain the peak-valley time periods and electricity price data; and / or

[0024] Before performing the calculations for the economic reservation mode and the traditional reservation mode, determine the type of food in the rice cooker, and determine the longest heat preservation duration and cooking duration according to the type of the food. In the specific implementation manner of the above control method for the economy of the DC rice cooker, the control method further includes the following steps:

[0025] Perform an optimization calculation for the economic reservation mode according to the peak-valley electricity time periods and electricity price data of the previous day to obtain the optimal economic reservation mode.

[0026] In the specific implementation manner of the above control method for the economy of the DC rice cooker, "performing an optimization calculation for the economic reservation mode according to the peak-valley electricity time periods and electricity price data of the previous day to obtain the optimal economic reservation mode" specifically includes the following steps:

[0027] S21. Set the economic electricity price = the first total electricity price;

[0028] S22. Obtain the second total electricity price required for the rice cooker to complete cooking starting from the reservation moment, and obtain the third total electricity price required for the rice cooker to keep warm until the preset moment;

[0029] S23. Determine whether the sum of the second total electricity price and the third total electricity price is less than the economic electricity price; if so, then set the economic electricity price = the second total electricity price + the third total electricity price, the optimal start time = the reserved time, the reserved time = the reserved time + the second preset duration, and proceed to step S24; if not, then the reserved time = the reserved time + the second preset duration, and proceed to step S24;

[0030] S24. Determine whether the reserved time is within the valley period; if so, then proceed to step S22; if not, then end the calculation of the economic reservation mode. In the economic reservation mode, the rice cooker starts running from the optimal start time.

[0031] In a second aspect, the present invention provides a DC rice cooker, which includes a control module configured to be able to execute the control method for the economy of the DC rice cooker as described above.

[0032] In the case of adopting the above technical solution, the present invention can determine the first total electricity price, the second total electricity price, and the third total electricity price according to the cooking duration, the preset time, and the longest heat preservation duration, and then determine the operation mode according to the first total electricity price, the second total electricity price, and the third total electricity price; if the first total electricity price is greater than the sum of the second total electricity price and the third total electricity price, then operate according to the economic reservation mode; if the first total electricity price is not greater than the sum of the second total electricity price and the third total electricity price, then operate according to the traditional reservation mode.

[0033] In addition, during the heat preservation process, the heat storage module is preferentially used to release heat to keep the food warm, which can reduce the electricity consumption for heat preservation and make the economy of the economic reservation mode better.

[0034] Determine a more economical operation mode according to the total electricity price of each mode of operation, and then operate according to the more economical operation mode, which can make the economy of the rice cooker reach the best; when operating according to the economic reservation mode, it can also relieve the power supply pressure of the power system during the peak period and increase the power consumption of the power system during the valley period. Moreover, first obtain the earliest start time of the rice cooker according to the preset time, the cooking duration, and the longest heat preservation duration, which can ensure the taste of the food, does not affect the user experience, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following describes the preferred embodiments of the present invention with reference to the drawings, in which:

[0036] Figure 1 is a schematic flowchart of the main steps of the control method for the economy of the DC rice cooker provided in Embodiment 1 of the present invention;

[0037] Figure 2It is a schematic flow chart of the detailed steps of the optimization calculation provided in the first embodiment of the present invention;

[0038] Figure 3 It is a schematic flow chart of the detailed steps of the control method for the economy of the DC rice cooker provided in the first embodiment of the present invention. Specific embodiments

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0040] It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] In the existing reservation mode of the DC rice cooker, if the time after cooking during the valley period is too long from the user's meal time, it will affect the taste of the rice and reduce the user experience. Similarly, only considering the initial cooking without considering the electricity consumption required for subsequent heat preservation, there may be a situation where the electricity bill caused by starting the reservation cooking during the valley period is more than that of the traditional reservation mode.

[0043] To solve the technical problems that the existing reservation mode of the rice cooker may require more electricity bills than the traditional reservation mode and is not economically preferred; in addition, making an early reservation will affect the taste of the rice and result in a poor user experience.

[0044] This embodiment discloses a DC rice cooker, which includes a control module configured to be capable of the control method for the economy of the DC rice cooker.

[0045] Equipped with the DC rice cooker is an energy system and an AC-DC conversion module, where the AC-DC conversion module can convert the alternating current of the household power grid into direct current so that the DC rice cooker can be directly used.

[0046] The new energy system can specifically be a photovoltaic system, and of course, it can also be a wind energy system. The electric energy generated by the photovoltaic system can be directly used by the user's household appliances or uploaded to the power grid to obtain benefits. Since the new energy system generates direct current electricity, it can be directly used by DC household appliances. Specifically, it can be used by a DC rice cooker. In order to enable the electricity generated by the new energy system to be uploaded to the power grid, it needs to be converted through a direct current to alternating current conversion module. It is set between the new energy system and the power grid and is used to convert the direct current electricity generated by the new energy system into alternating current electricity, and then upload the alternating current electricity to the power grid.

[0047] To save costs and installation space, a bidirectional converter is used to replace the direct current to alternating current conversion module and the alternating current to direct current conversion module. The new energy system is also equipped with an energy storage module, which can specifically be a storage battery; the electric energy generated by the new energy system can be stored in the storage battery when it cannot be consumed immediately, and when the new energy system cannot generate electricity, the energy storage module can discharge electricity for use by DC household appliances. Specifically, the energy storage module can discharge electricity during peak hours, which can save the user's electricity bill.

[0048] The DC rice cooker includes a heat storage module, which is specifically coated on the inner pot. The heat storage module is mainly used for heat storage and heat release. The heat storage material of the heat storage module is specifically a phase change material, which can absorb and release heat. When the rice cooker is cooking rice, the heat storage module can absorb the heat released by the inner pot and store it; when the rice cooker is keeping warm, the heat storage module can release heat to keep the food in the inner pot warm.

[0049] As Figure 1 shown, the control method for the economy of the DC rice cooker mainly includes the following steps:

[0050] S001. In the traditional reservation mode, obtain the first total electricity price required for the rice cooker to complete cooking until the preset time.

[0051] S002. In the economy reservation mode, obtain the earliest start time of the rice cooker according to the preset time, cooking duration, and the longest heat preservation duration, obtain the second total electricity price required for the rice cooker to complete cooking after the earliest start time, and obtain the third total electricity price required for the rice cooker to keep warm until the preset time; during the heat preservation process, give priority to using the heat released by the heat storage module to keep the food warm.

[0052] S003. Determine the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price. It specifically includes the following steps:

[0053] If the first total electricity price is greater than the sum of the second total electricity price and the third total electricity price, then operate according to the economy reservation mode. If the first total electricity price is not greater than the sum of the second total electricity price and the third total electricity price, then operate according to the traditional reservation mode.

[0054] Determine a more economical operation mode according to the total electricity price of each mode, and then operate according to the more economical operation mode, which can optimize the economy of the rice cooker; when operating in the economic reservation mode, it can also relieve the power supply pressure of the power system during peak hours and increase the power consumption of the power system during valley hours. Moreover, first obtain the earliest start time of the rice cooker according to the preset time, cooking duration and maximum holding duration, which can ensure the taste of the food, does not affect the user experience, and improves the user experience.

[0055] This rice cooker is equipped with a smart terminal, and the operation mode of the rice cooker can be controlled through the smart terminal. Specifically, a display screen is provided on the smart terminal, and the total electricity prices of the traditional reservation mode and the economic reservation mode can be displayed on the display screen, and then the user can select on the smart terminal whether to operate according to the economic reservation mode. The smart terminal can specifically be a rice cooker remote control, or a mobile phone or a tablet, etc. In this embodiment, a mobile phone is preferably used. The mobile phone and the rice cooker are both connected to the smart home system, and a corresponding APP is installed on the mobile phone. The total electricity prices of the traditional reservation mode and the economic reservation mode can be displayed on the APP, and then the user selects the operation mode according to the total electricity price. The mobile phone can be controlled remotely, and the rice cooker can be controlled when at work, which is relatively convenient and fast.

[0056] The preset time can be input in the APP, and then the control module of the rice cooker calculates and obtains the first total electricity price of the traditional reservation mode, the second total electricity price and the third total electricity price of the economic reservation mode according to the preset time.

[0057] Among them, the earliest start time = preset time - cooking duration - maximum holding duration.

[0058] Among them, "during the holding process, the heat storage module is preferentially used to release heat to keep the food warm" includes:

[0059] If the heat released by the heat storage module can meet the heat required for keeping warm within the holding duration, only the heat storage module is used to keep the food warm; at this time, the third total electricity price is zero.

[0060] If the heat released by the heat storage module cannot meet the heat required for keeping warm within the holding duration, the heat released by the heat storage module is used in combination with the rice cooker heating to keep the food warm.

[0061] Among them, "using the heat released by the heat storage module in combination with the rice cooker heating to keep the food warm" includes:

[0062] If the holding duration period includes peak hours, and the heat released by the heat storage module can meet the heat required for keeping warm during the peak hours within the holding duration, the heat storage module is used to keep the food warm during peak hours, and the heat released by the heat storage module and / or the rice cooker heating is used to keep the food warm during other periods within the holding duration.

[0063] "Using the heat storage module to release heat and / or using the rice cooker to heat during other periods within the heat preservation duration to keep the food warm" specifically includes: If the amount of heat required during the peak period within the heat preservation duration is the same as the heat released by the heat storage module, then use the rice cooker to heat during other periods within the heat preservation duration to keep the food warm. At this time, the third total electricity price is the total electricity price for the electricity consumption required for the rice cooker to heat up.

[0064] "Using the heat storage module to release heat and / or using the rice cooker to heat during other periods within the heat preservation duration to keep the food warm" also specifically includes: If the amount of heat required during the peak period within the heat preservation duration is less than the heat released by the heat storage module, then first use the rice cooker to heat during other periods within the heat preservation duration to keep the food warm, and then use the heat storage module to release heat to keep the food warm (mainly applicable to the case where the valley period is before the peak period); it is also possible to first use the heat storage module to release heat to keep the product warm, and then use the rice cooker to heat the product (mainly used in the case where the peak period is before the valley period). This can maintain the continuity of power supply and avoid frequent switching of working modes. At this time, the third total electricity price is the total electricity price for the electricity consumption required for the rice cooker to heat up.

[0065] "Using the heat storage module to release heat in combination with the rice cooker to heat during other periods within the heat preservation duration to keep the food warm" also includes:

[0066] If the heat preservation duration includes a peak period and the heat released by the heat storage module cannot meet the heat required for heat preservation during the peak period within the heat preservation duration, then use the heat storage module to release heat in combination with the rice cooker to heat during the peak period to keep the food warm, and use the rice cooker to heat during other periods within the heat preservation duration to keep the food warm. "Using the heat storage module to release heat in combination with the rice cooker to heat during the peak period to keep the food warm" specifically includes, first using the rice cooker to heat during the peak period to keep the food warm, and then using the heat storage module to release heat to keep the food warm (mainly applicable to the case where the valley period is before the peak period); it is also possible to first use the heat storage module to release heat to keep the product warm, and then use the rice cooker to heat the product (mainly used in the case where the peak period is before the valley period). This can maintain the continuity of power supply and avoid frequent switching of working modes. At this time, the third total electricity price is the total electricity price for the electricity consumption required for the rice cooker to heat up.

[0067] "Using the heat storage module to release heat in combination with the rice cooker to heat during other periods within the heat preservation duration to keep the food warm" also includes:

[0068] If the heat preservation duration does not include a peak period, then use the heat storage module to release heat in combination with the rice cooker to heat during other periods within the heat preservation duration to keep the food warm. Specifically, first use the rice cooker to heat during other periods within the heat preservation duration to keep the food warm, and then use the heat storage module to release heat to keep the food warm. This method can maintain the continuity of power supply and avoid frequent switching of working modes. At this time, the third total electricity price is the total electricity price for the electricity consumption required for the rice cooker to heat up.

[0069] Since the new energy system is equipped with an energy storage module, the energy storage module can discharge electricity during peak hours for the rice cooker to use. If the rice cooker uses the electricity of the energy storage module, the consumed electricity price is zero.

[0070] In addition, the control method for the economy of the DC rice cooker further includes the following steps: before calculating the economic reservation mode and the traditional reservation mode, obtain the peak-valley time periods and electricity price data; specifically including the start times of the valley period and the peak period and the respective electricity prices of the valley period and the peak period. Specifically, the electricity prices of the valley period and the peak period can be manually input in advance on the APP, specifically at least 2-3 hours in advance of the preset time; of course, it can also be input one day in advance. Inputting one day in advance can perform optimization calculations to obtain the optimal economic reservation mode.

[0071] Regarding the peak-valley time periods and electricity price data, it should be noted that although in this embodiment, it is manually input in advance on the APP, this is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can also choose in other embodiments to automatically obtain data from the network by the APP. Specifically, it can be connected to the power system to obtain data according to the data published by the power system. These do not depart from the basic principle of the present invention and will thus fall within the protection scope of the present invention.

[0072] In addition, the control method for the economy of the DC rice cooker further includes the following steps: before calculating the economic reservation mode and the traditional reservation mode, judge the type of the food in the rice cooker, and determine the longest holding time and cooking time according to the type of the food. A camera is provided in the rice cooker to be able to photograph the food in the inner pot, and then judge and determine the type of the food according to the photographed picture. Among them, determining the type of the food according to the photographed picture is a conventional technical means in the field of photo recognition. In this embodiment, the specific recognition process is not limited and will not be elaborated.

[0073] Regarding the determination of the type of the food, it should be noted that although in this embodiment, it is automatic license plate recognition by the rice cooker; this is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can also choose to manually input the type of the food, which does not depart from the basic principle of the present invention and will thus fall within the protection scope of the present invention.

[0074] Among them, the food specifically includes rice, glutinous rice, porridge, multi-grain rice, and mung bean porridge, etc. Among them, the cooking time required for rice is 0.5 h, and the longest holding time is 2 h; the cooking time for glutinous rice is 0.5 h, and the longest holding time is 1 h; the cooking time for multi-grain rice is 0.6 h, and the longest holding time is 3 h; the cooking time for porridge is 0.4 h, and the longest holding time is 3 h; the cooking time for mung bean porridge is 0.6 h, and the longest holding time is 3 h.

[0075] Regarding the type of food, the cooking duration and the maximum holding duration of each food item, it should be noted that the above is only an exemplary description; however, this is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can also change the cooking duration and the maximum holding duration of each food item according to personal taste requirements. This does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0076] Regarding the maximum holding duration of food, it should be noted that the above is only an exemplary description; however, this is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can also determine the user's taste preference according to the most frequently selected historical cooking records and use the maximum holding duration of the historical cooking records as the maximum holding duration for cooking. This does not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0077] If the valley period is not included in the reservation period, there is no need to perform optimization calculations and the rice cooking can be directly carried out according to the traditional reservation mode.

[0078] Since the valley period lasts for a long time, if the total electricity price of the economic reservation mode is calculated based on the start time of the valley period, it may be relatively high; if the total electricity price of the economic reservation mode is calculated based on the approaching end time of the valley period, it may not meet the cooking requirements. Therefore, optimization calculations can be performed on the economic reservation mode to find the most economically suitable economic reservation mode.

[0079] Specifically, optimization calculations are performed on the economic reservation mode according to the peak-valley electricity period and electricity price data of the previous day to obtain the optimal economic reservation mode. As Figure 2 shown, it specifically includes the following steps:

[0080] S20. Determine whether the earliest start time is before the valley period. If so, proceed to step S201; if not, proceed to step S202;

[0081] S201. Set the reservation time = the start time of the valley period, and then proceed to step S21;

[0082] S202. Set the reservation time = the preset time - the cooking duration - the maximum holding duration, and then proceed to step S21;

[0083] S21. Set the economic electricity price = the first total electricity price;

[0084] S22. Obtain the second total electricity price required for the rice cooker to complete cooking starting from the reservation time, and obtain the third total electricity price required for the rice cooker to keep warm until the preset time;

[0085] If the heat released by the heat storage module can meet the heat required for heat preservation within the heat preservation duration, only the heat storage module is used to keep the food warm, and the third total electricity price is zero.

[0086] If the heat released by the heat storage module cannot meet the heat required for heat preservation within the heat preservation duration, the heat released by the heat storage module is used in combination with the rice cooker heating to keep the food warm, and the third total electricity price is the electricity price of the electricity consumed by the rice cooker heating.

[0087] S23. Determine whether the sum of the second total electricity price and the third total electricity price is less than the economic electricity price; if so, proceed to step S231; if not, proceed to step S232;

[0088] S231. Set the economic electricity price = the second total electricity price + the third total electricity price, the optimal start time = the reservation time, the reservation time = the reservation time + the second preset duration, and proceed to step S24;

[0089] S232. The reservation time = the reservation time + the second preset duration, and proceed to step S24;

[0090] The second preset duration is preferably 5 min in this embodiment; it should be noted that although it is limited to 5 min in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art can also select 8 min, 10 min, 15 min, etc. This does not depart from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0091] S24. Determine whether the reservation time is within the valley period; if so, proceed to step S22; if not, proceed to step S241;

[0092] S241. End the calculation of the economic reservation mode; in the economic reservation mode, the rice cooker runs from the optimal start time.

[0093] Through the optimization calculation, the start time of the economic reservation mode can cover each section of the valley period after the earliest start time, the optimal start time of the economic reservation mode can be determined, and then the optimal economic reservation mode can be determined. By comparing the optimal economic reservation mode with the traditional reservation mode, the economy of the rice cooker can be optimized.

[0094] After the optimization calculation of the economic reservation mode is completed, determine the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price; that is, determine the operation mode according to the magnitudes of the first total electricity price and the economic electricity price.

[0095] If the first total electricity price is greater than the sum of the economic electricity prices, run according to the economic reservation mode; if the first total electricity price is not greater than the economic electricity price, run according to the traditional reservation mode.

[0096] As Figure 3 shown, the control method for the economy of the DC rice cooker specifically includes the following steps:

[0097] S010. Determine whether the reservation period includes the valley period. If not, proceed to step S21. If so, proceed to step S011.

[0098] S011. Obtain the peak-valley period and electricity price data; specifically, obtain the peak-valley electricity period and electricity price data of the previous day. Based on the peak-valley period and electricity price data of the previous day, it is convenient to perform optimization calculations to obtain the optimal economic reservation mode.

[0099] S012. Determine the type of food in the rice cooker, and determine the longest heat preservation duration and cooking duration according to the type of food.

[0100] S013. Obtain the first total electricity price required for the rice cooker to complete cooking until the preset time; that is, obtain the first total electricity price required for the traditional reservation mode.

[0101] S014. Determine whether the earliest start time is before the valley period. If so, proceed to step S0141; if not, proceed to step S0142;

[0102] S0141. Set the reservation time = the start time of the valley period, and then proceed to step S015;

[0103] S0142. Set the reservation time = the preset time - the cooking duration - the longest heat preservation duration, and then proceed to step S015;

[0104] S015. Set the economic electricity price = the first total electricity price;

[0105] S016. Obtain the second total electricity price required for the rice cooker to complete cooking since the reservation time, and obtain the third total electricity price required for the rice cooker to keep warm until the preset time;

[0106] S017. Determine whether the sum of the second total electricity price and the third total electricity price is less than the economic electricity price. If so, proceed to step S1071; if not, proceed to step S1072;

[0107] S0171. Make the economic electricity price = the second total electricity price + the third total electricity price, the best start time = the reservation time, the reservation time = the reservation time + the second preset duration, and proceed to step S018;

[0108] S0172. The reservation time = the reservation time + the second preset duration, and proceed to step S018;

[0109] S018. Determine whether the reservation time is within the valley period. If it is, proceed to step S016. If not, end the calculation of the economic reservation mode and then proceed to step S019.

[0110] S019. Determine whether the first total electricity price is greater than the economic electricity price. If it is, proceed to step S020; if not, proceed to step S021.

[0111] S020. Operate in the economic reservation mode; in the economic reservation mode, the rice cooker operates from the optimal start time.

[0112] S021. Operate in the traditional reservation mode.

[0113] Regarding the above steps, it should be noted that the order of the above steps is not limited. Without departing from the principle of the present invention, those skilled in the art can also choose to swap some steps in other embodiments as long as the function is not affected. Some steps can be swapped arbitrarily. Specifically, S015 can be advanced, or S012 can be advanced; all of these do not depart from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0114] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A control method for the economy of a DC rice cooker, characterized in that The DC rice cooker includes a heat storage module. When the rice cooker is cooking rice, the heat storage module can absorb the heat released by the inner pot and store it. When the rice cooker is keeping warm, the heat storage module can release heat to keep the food in the inner pot warm. The control method includes the following steps: In the traditional reservation mode, obtain the first total electricity price required for the rice cooker to complete cooking until the preset time. In the economic reservation mode, obtain the earliest start time of the rice cooker according to the preset time, cooking duration, and maximum holding duration, obtain the second total electricity price required for the rice cooker to complete cooking during the valley period after the earliest start time, and obtain the third total electricity price required for the rice cooker to keep warm until the preset time. During the warming process, preferentially use the heat released by the heat storage module to keep the food warm. Determine the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price.

2. The control method according to claim 1, characterized in that "During the warming process, preferentially use the heat released by the heat storage module to keep the food warm" includes: If the heat released by the heat storage module can meet the heat required for warming during the warming duration, only use the heat storage module to keep the food warm.

3. The control method according to claim 1, wherein "During the warming process, preferentially use the heat released by the heat storage module to keep the food warm" also includes: If the heat released by the heat storage module cannot meet the heat required for warming during the warming duration, use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm.

4. The control method according to claim 3, wherein "Use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm" includes: If the warming duration includes a peak period and the heat released by the heat storage module can meet the heat required for warming during the peak period of the warming duration, use the heat storage module to keep the food warm during the peak period, and use the heat released by the heat storage module and / or the heating of the rice cooker to keep the food warm during other periods of the warming duration.

5. The control method according to claim 3, characterized in that, "Use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm" also includes: If the warming duration includes a peak period and the heat released by the heat storage module cannot meet the heat required for warming during the peak period of the warming duration, use the heat released by the heat storage module in combination with the heating of the rice cooker to keep the food warm during the peak period, and use the heating of the rice cooker to keep the food warm during other periods of the warming duration.

6. The control method according to claim 1, wherein "Determine the operation mode according to the magnitudes of the first total electricity price, the second total electricity price, and the third total electricity price" specifically includes the steps: If the first total electricity price is greater than the sum of the second total electricity price and the third total electricity price, operate in the economic reservation mode; and / or If the first total electricity price is not greater than the sum of the second total electricity price and the third total electricity price, operate in the traditional reservation mode.

7. The control method according to claim 6, characterized in that The control method further includes the following steps: Before performing the calculations for the economic reservation mode and the traditional reservation mode, obtain the peak-valley period and electricity price data; and / or Before performing the calculations for the economic reservation mode and the traditional reservation mode, determine the type of food in the rice cooker, and determine the maximum holding duration and cooking duration according to the type of the food.

8. The control method according to claim 7, wherein The control method further includes the following steps: Optimize the economic reservation mode based on the peak-valley electricity time periods and electricity price data of the previous day to obtain the optimal economic reservation mode.

9. The control method according to claim 8, wherein "Optimize the economic reservation mode based on the peak-valley electricity time periods and electricity price data of the previous day to obtain the optimal economic reservation mode" specifically includes the following steps: S21. Set the economic electricity price = the first total electricity price; S22. Obtain the second total electricity price required for the rice cooker to complete cooking starting from the reservation moment, and obtain the third total electricity price required for the rice cooker to keep warm until the preset moment; S23. Determine whether the sum of the second total electricity price and the third total electricity price is less than the economic electricity price; If so, make the economic electricity price = the second total electricity price + the third total electricity price, the best start time = the reservation moment, the reservation moment = the reservation moment + the second preset duration, and proceed to step S24; If not, the reservation moment = the reservation moment + the second preset duration, and proceed to step S24; S24. Determine whether the reservation moment is within the valley time period. If so, proceed to step S22. If not, end the calculation of the economic reservation mode. In the economic reservation mode, the rice cooker operates starting from the best start time.

10. A DC rice cooker, characterized in that, It includes a control module, and the control module is configured to be capable of executing the control method for the economy of the DC rice cooker according to any one of claims 1-9.

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