WO2024082241A1 - Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé - Google Patents

Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé Download PDF

Info

Publication number
WO2024082241A1
WO2024082241A1 PCT/CN2022/126537 CN2022126537W WO2024082241A1 WO 2024082241 A1 WO2024082241 A1 WO 2024082241A1 CN 2022126537 W CN2022126537 W CN 2022126537W WO 2024082241 A1 WO2024082241 A1 WO 2024082241A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
heating
temperature measurement
cavity
measurement value
Prior art date
Application number
PCT/CN2022/126537
Other languages
English (en)
Chinese (zh)
Inventor
黄战彬
谢瑞
朱良
Original Assignee
深圳市虎一科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市虎一科技有限公司 filed Critical 深圳市虎一科技有限公司
Priority to PCT/CN2022/126537 priority Critical patent/WO2024082241A1/fr
Publication of WO2024082241A1 publication Critical patent/WO2024082241A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/24—Warming devices

Definitions

  • the invention relates to the technical field of cooking, and in particular to a steam oven and a heating and cooling control method thereof.
  • the present invention provides a steam oven and a heating and cooling control method thereof, wherein the steam oven and the heating and cooling control method thereof can obtain an accurate actual temperature when the temperature variation range in the steam oven is large, and perform heating and/or cooling based on the actual temperature.
  • an embodiment provides a steam oven, comprising:
  • a box body having a cavity for containing food and an opening connecting the outside with the cavity;
  • a door which is used to open and close the opening
  • a heating device the heating device is used to increase the temperature in the cavity
  • a refrigeration device the refrigeration device is used to reduce the temperature in the cavity
  • a temperature detection device comprising a first temperature sensor and a second temperature sensor, the first temperature sensor being used to obtain a first temperature measurement value in the cavity, the second temperature sensor being used to obtain a second temperature measurement value in the cavity, the measurement accuracy of the first temperature sensor being higher than the measurement accuracy of the second temperature sensor within a first temperature measurement sensitive range, and the measurement accuracy of the second temperature sensor being higher than the measurement accuracy of the first temperature sensor within a second temperature measurement sensitive range different from the first temperature measurement sensitive range;
  • a control device is used to determine the actual temperature in the cavity according to at least one of the first temperature measurement value and the second temperature measurement value, and control the heating device and/or the refrigeration device according to the actual temperature.
  • an embodiment provides a steam oven, comprising:
  • a box body having a cavity for containing food and an opening connecting the outside with the cavity;
  • a door which is used to open and close the opening
  • a heating device the heating device is used to increase the temperature in the cavity
  • a refrigeration device the refrigeration device is used to reduce the temperature in the cavity
  • the temperature detection device comprising a first temperature sensor and a second temperature sensor, the first temperature sensor being used to obtain a first temperature measurement value in the cavity, the second temperature sensor being used to obtain a second temperature measurement value in the cavity, a first curve of resistance variation with temperature of the first temperature sensor being different from a second curve of resistance variation with temperature of the second temperature sensor;
  • a control device is used to determine the actual temperature in the cavity according to at least one of the first temperature measurement value and the second temperature measurement value, and control the heating device and/or the refrigeration device according to the actual temperature.
  • an embodiment provides a steam oven, comprising:
  • a box body having a cavity for containing food and an opening connecting the outside with the cavity;
  • a door which is used to open and close the opening
  • a heating device the heating device is used to increase the temperature in the cavity
  • a refrigeration device the refrigeration device is used to reduce the temperature in the cavity
  • the temperature detection device comprising a first temperature sensor and a second temperature sensor, the first temperature sensor being used to obtain a first temperature measurement value in the cavity, and the second temperature sensor being used to obtain a second temperature measurement value in the cavity;
  • a control device configured to obtain a temperature control mode set for the cavity, the temperature control mode comprising a heating mode and a cooling mode, and when the temperature control mode is the heating mode, determining the first temperature measurement value as the actual temperature in the cavity, and when the temperature control mode is the cooling mode, determining the second temperature measurement value as the actual temperature in the cavity;
  • the heating device is controlled and/or the cooling device is controlled according to the actual temperature.
  • an embodiment provides a steam oven, comprising:
  • a box body having a cavity for containing food and an opening connecting the outside with the cavity;
  • a door which is used to open and close the opening
  • a heating device the heating device is used to increase the temperature in the cavity
  • a refrigeration device the refrigeration device is used to reduce the temperature in the cavity
  • a temperature detection device wherein the temperature detection device comprises at least two temperature sensors, each of which is used to obtain a temperature measurement value in the cavity, each of which has a corresponding temperature measurement sensitive range, and the measurement accuracy of each temperature sensor within the corresponding temperature measurement sensitive range is higher than the measurement accuracy of other temperature sensors, and the temperature measurement sensitive ranges corresponding to different temperature sensors do not intersect;
  • a control device is used to determine the actual temperature in the cavity according to the temperature measurement value of the at least one temperature sensor, and control the heating device and/or the refrigeration device according to the actual temperature.
  • an embodiment provides a heating and cooling control method for a steam oven, comprising:
  • a measurement accuracy of the first temperature sensor is higher than a measurement accuracy of the second temperature sensor, and within a second temperature measurement sensitive range different from the first temperature measurement sensitive range, a measurement accuracy of the second temperature sensor is higher than a measurement accuracy of the first temperature sensor;
  • An actual temperature in the cavity is determined based on at least one of the first temperature measurement value and the second temperature measurement value, and heating and/or cooling of the cavity is controlled based on the actual temperature.
  • an embodiment provides a heating and cooling control method for a steam oven, comprising:
  • An actual temperature in the cavity is determined based on at least one of the first temperature measurement value and the second temperature measurement value, and heating and/or cooling of the cavity is controlled based on the actual temperature.
  • an embodiment provides a heating and cooling control method for a steam oven, comprising:
  • a measurement accuracy of the first temperature sensor is higher than a measurement accuracy of the second temperature sensor, and within a second temperature measurement sensitive range different from the first temperature measurement sensitive range, a measurement accuracy of the second temperature sensor is higher than a measurement accuracy of the first temperature sensor;
  • a temperature control mode set for the cavity including a heating mode and a cooling mode, and when the temperature control mode is the heating mode, determine the first temperature measurement value as the actual temperature in the cavity, and when the temperature control mode is the cooling mode, determine the second temperature measurement value as the actual temperature in the cavity;
  • the heating and/or cooling of the cavity is controlled according to the actual temperature.
  • an embodiment provides a heating and cooling control method for a steam oven, comprising:
  • the temperature measurement value in the inner cavity of the steam oven is obtained by each of the at least two temperature sensors, each of the temperature sensors has a corresponding temperature measurement sensitive range, the measurement accuracy of each temperature sensor in the corresponding temperature measurement sensitive range is higher than the measurement accuracy of other temperature sensors, and the temperature measurement sensitive ranges corresponding to different temperature sensors do not intersect;
  • the actual temperature in the cavity is determined according to the temperature measurement value of the at least one temperature sensor, and the heating and/or cooling of the cavity is controlled according to the actual temperature.
  • an embodiment provides a computer-readable storage medium, on which a program is stored, and the program can be executed by a processor to implement the above method.
  • At least two temperature sensors are used to obtain the temperature measurement value in the cavity, so that at least two temperature measurement values can be provided at the same time.
  • Each temperature sensor has its own most accurate temperature measurement sensitivity range, and different temperature sensors have different temperature measurement sensitivity ranges. Therefore, at different temperatures, each of the at least two temperature measurement values has a corresponding degree of credibility. Comprehensively considering the two temperature measurement values can obtain a more accurate actual temperature in the cavity, and heating or cooling based on this actual temperature can bring better cooking effects.
  • FIG1 is a structural block diagram of a steam oven according to an embodiment
  • FIG2 is a schematic structural diagram of a steam oven according to an embodiment
  • FIG3 is a front schematic diagram of a steam oven according to an embodiment
  • FIG4 is a schematic structural diagram of a refrigeration device according to an embodiment
  • FIG5 is a flow chart of a heating and cooling control method for a steam oven according to an embodiment
  • FIG6 is a flow chart of a heating and cooling control method of a steam oven according to another embodiment
  • Air guide port
  • heating device 300, heating device; 310, heating tube;
  • Control device 600. Control device.
  • connection and “coupling” mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).
  • the standard temperature measuring instrument referred to in this article refers to a standard instrument that has been calibrated and can obtain accurate temperature measurement values within its measurement range.
  • the semiconductor cooling sheet referred to in this article is based on the Peltier effect, so that the effect of cooling or heating can be achieved.
  • the principle of cooling or refrigeration is that when an electric current passes through two connected conductors, a temperature difference will be generated at the connection, that is, the connection will absorb and release heat. This effect was discovered by the Frenchman Jean-Charles Peltier in 1834. The amount of heat absorbed and released in the Peltier effect is determined by the magnitude of the current. People have manufactured cooling and heating elements based on the Peltier effect, such as the Peltier cooling and heating sheet. When the Peltier cooling and heating sheet is powered on, one side absorbs heat (cooling) and the other side releases heat (heating). The heat absorption surface and the heat release surface can be changed by changing the direction of the current.
  • a steam oven which includes a box body 100 , a box door 200 , a heating device 300 , a refrigeration device 400 , a temperature detection device 500 and a control device 600 .
  • the box body 100 has a cavity 110 for accommodating food and an access opening 120 communicating the outside with the cavity 110 .
  • a user can access food or tools such as a baking tray through the access opening 120 .
  • the box door 200 is movably connected to the box body 100, specifically, it can be rotatably connected by a hinge connection or other methods, or it can be linearly connected by other methods.
  • the box door 200 has an open state and a closed state. When the box door 200 is in the open state, the access opening 120 is opened, and when the box door 200 is in the closed state, the access opening 120 is closed.
  • the heating device 300 is used to increase the temperature in the cavity 110, that is, to realize the baking function of the steam oven.
  • the heating device 300 may include one or more heating tubes 310 located in the cavity 110, which heat the cavity 110 by emitting heat radiation.
  • the multiple heating tubes 310 are distributed on the top wall and side walls of the cavity 110 to heat the food from multiple angles in all directions.
  • the multiple heating tubes 310 can also be distributed at other positions of the cavity 110.
  • the refrigeration device 400 is used to reduce the temperature in the cavity 110, that is, to realize the refrigeration function of the steam oven, and the refrigeration function can be used in the scenario of low-temperature cooking of food.
  • two air guide ports 111 are also provided on the same side wall of the cavity 110.
  • the two air guide ports 111 may not be on the same side wall, and more than two air guide ports 111 may be provided on the cavity 110, at least one of which is used to receive the air in the cavity 110, and at least another one is used to exhaust air into the cavity 110.
  • the refrigeration device 400 includes a housing 410 , a valve 420 corresponding to the air guide port 111 , a semiconductor refrigeration module 430 , and a fan 440 .
  • the shell 410 is arranged on one side of the box body 100, and a gas channel 450 connecting two air ducts 111 is provided in the shell 410.
  • the valve 420 is arranged at the corresponding air duct 111.
  • the valve 420 can close and open the corresponding air duct 111 to conduct or isolate the gas channel 450 and the cavity 110. It is easy to understand that when the cavity 110 is heated, each valve 420 closes the corresponding air duct 111.
  • the semiconductor refrigeration module 430 has a hot end and a cold end.
  • the cold end of the semiconductor refrigeration module 430 is used to cool the gas channel 450, and the hot end of the semiconductor refrigeration module 430 is used to discharge heat to the outside of the box 100.
  • the semiconductor refrigeration module 430 includes at least a semiconductor refrigeration sheet, and may also include necessary components such as a heat conducting plate.
  • the semiconductor refrigeration technology is a mature technology at present, and will not be described in detail here.
  • the fan 440 is disposed in the gas channel 450 .
  • the fan 440 rotates, it inhales gas from the cavity 110 through one air guide port 111 and delivers gas to the cavity 110 through another air guide port 111 .
  • the temperature detection device 500 includes a first temperature sensor 510 and a second temperature sensor 520.
  • the first temperature sensor 510 is used to obtain a first temperature measurement value in the cavity 110
  • the second temperature sensor 520 is used to obtain a second temperature measurement value in the cavity 110.
  • the first temperature sensor 510 and the second temperature sensor 520 themselves have the following differences: the measurement accuracy of the first temperature sensor 510 is higher than the measurement accuracy of the second temperature sensor 520 in the first temperature measurement sensitive range, and the measurement accuracy of the second temperature sensor 520 is higher than the measurement accuracy of the first temperature sensor 510 in the second temperature measurement sensitive range different from the first temperature measurement sensitive range.
  • the first temperature measurement sensitive range is 100°C to 200°C
  • the second temperature measurement sensitive range is 30°C to 80°C.
  • the first temperature measurement value obtained by the first temperature sensor 510 is more accurate
  • the second temperature measurement value obtained by the second temperature sensor 520 is more accurate.
  • the temperature measurement sensitive range is different from the temperature measurement range of the temperature sensor, and the first temperature sensor 510 and the second temperature sensor 520 can have the same temperature measurement range.
  • the measurement accuracy in different temperature measurement sensitive ranges can be reflected by the error between the first temperature measurement value and the reading of the standard temperature measuring instrument, that is, within the first temperature measurement sensitive range, the difference between the first temperature measurement value and the reading of the standard temperature measuring instrument is smaller than the difference between the second temperature measurement value and the reading of the standard temperature measuring instrument, and within the second temperature measurement sensitive range, the difference between the second temperature measurement value and the reading of the standard temperature measuring instrument is smaller than the difference between the first temperature measurement value and the reading of the standard temperature measuring instrument.
  • the measurement accuracy in different temperature measurement sensitivity ranges can be distinguished by the curve of resistance changing with temperature, that is, the first curve of resistance changing with temperature of the first temperature sensor 510 is different from the second curve of resistance changing with temperature of the second temperature sensor 520.
  • the lowest temperature value of the first temperature measurement sensitive range referred to below is greater than the highest temperature value of the second temperature measurement sensitive range, that is, the two temperature measurement sensitive ranges have no intersection and the first temperature measurement sensitive range is higher.
  • the positions of the first temperature sensor 510 and the second temperature sensor 520 in the cavity 110 are also designed. It can be understood that the first temperature measurement sensitive range and the second temperature measurement sensitive range may also have an intersection or at least partially overlap.
  • the highest temperature value in the second temperature measurement sensitive range is less than the highest temperature value in the first temperature measurement sensitive range, it is defined that the second temperature measurement sensitive range is lower than the first temperature measurement sensitive range.
  • the cavity 110 includes a first heating area and a second heating area.
  • the first temperature sensor 510 is located in the first heating area
  • the second temperature sensor 520 is located in the second heating area.
  • each temperature sensor can measure the temperature at a suitable position, that is, a temperature sensor that is more accurate at high temperature measures the temperature in the high temperature area, and a temperature sensor that is more accurate at low temperature measures the temperature in the low temperature area.
  • low temperature and high temperature are relative concepts.
  • the control device 600 is used to determine the actual temperature in the cavity 110 according to at least one of the first temperature measurement value and the second temperature measurement value, and control the heating device 300 and the cooling device 400 according to the actual temperature.
  • the “actual temperature” is introduced only for the convenience of describing the temperature measurement value used to control the heating device 300 and/or the refrigeration device 400 later.
  • “determine the actual temperature in the cavity according to at least one of the first temperature measurement value and the second temperature measurement value, and control the heating device and/or control the refrigeration device according to the actual temperature” means “control the heating device and/or control the refrigeration device according to at least one of the first temperature measurement value and the second temperature measurement value”, that is, which temperature measurement value is selected for relevant control, that is, which temperature measurement value is selected as the actual temperature, and then relevant control is performed according to the actual temperature.
  • the control device 600 compares the first temperature measurement value and/or the second temperature measurement value with the second temperature measurement sensitive range.
  • the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, the second temperature measurement value is determined as the actual temperature, or the heating device 300 and/or the refrigeration device 400 is controlled according to the second temperature measurement value; when the first temperature measurement value and/or the second temperature measurement value are not within the second temperature measurement sensitive range, the first temperature measurement value is determined as the actual temperature, or the heating device 300 and/or the refrigeration device 400 is controlled according to the first temperature measurement value.
  • the control device 600 compares the first temperature measurement value and/or the second temperature measurement value with the second temperature measurement sensitive range. When the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, the second temperature measurement value is determined as the actual temperature. If the first temperature measurement value and/or the second temperature measurement value are not within the second temperature measurement sensitive range, the first temperature measurement value and/or the second temperature measurement value are compared with the first temperature measurement sensitive range. When the first temperature measurement value and/or the second temperature measurement value are within the first temperature measurement sensitive range, the first temperature measurement value is determined as the actual temperature.
  • the method for determining the actual temperature by combining the first temperature measurement value and the second temperature measurement value can be: multiplying the first weight coefficient by the first temperature measurement value, multiplying the second weight coefficient by the second temperature measurement value, and then adding the two products to obtain the actual temperature, wherein the first weight coefficient and the second weight coefficient can be obtained based on experience.
  • the control device 600 compares the second temperature measurement value with the second temperature measurement sensitive range.
  • the second temperature measurement value is determined as the actual temperature.
  • the first temperature measurement value is compared with the first temperature measurement sensitive range.
  • the first temperature measurement value is determined as the actual temperature.
  • the second temperature measurement value is not within the second temperature measurement sensitive range and the first temperature measurement value is also not within the first temperature measurement sensitive range, it is necessary to combine the first temperature measurement value and the second temperature measurement value to determine the actual temperature.
  • the logic of determining the actual temperature is to first check whether the reading of the temperature sensor (second temperature sensor 520) corresponding to the low temperature is credible. When the second temperature measurement value is within the second temperature measurement sensitive range, it indicates that it is credible, and the reading of the temperature sensor is directly used. When the second temperature measurement value is not within the second temperature measurement sensitive range, it indicates that it is unreliable. Then check whether the reading of the temperature sensor (first temperature sensor 510) corresponding to the high temperature is credible. If it is credible, the reading of the temperature sensor is directly used. If it is unreliable, the readings of the two temperature sensors are not directly used.
  • the method of combining the first temperature measurement value and the second temperature measurement value to determine the actual temperature can be: multiplying the first weight coefficient with the first temperature measurement value, multiplying the second weight coefficient with the second temperature measurement value, and then adding the two products to obtain the actual temperature, wherein the first weight coefficient and the second weight coefficient can be obtained based on experience.
  • the above process of determining the actual temperature is confirmed from low temperature to high temperature. In other embodiments, it can also be confirmed from high temperature to low temperature, that is, first comparing the first temperature measurement value with the first temperature measurement sensitive range. When the first temperature measurement value is within the first temperature measurement sensitive range, the first temperature measurement sensitive range is directly used as the actual temperature.
  • control device 600 when determining which temperature measurement value to select for relevant control, can also control the steam oven to display the temperature measurement value. For example, when the first temperature measurement value is used to control the heating device 300, the first temperature measurement value is also displayed at the same time, so that the user can understand which temperature measurement value is currently used for control.
  • the steam oven has two temperature control modes, namely, a heating mode and a cooling mode, and the user can choose to enable the heating mode or the cooling mode.
  • the control device 600 determines the first temperature measurement value as the actual temperature in the cavity 110, and when the user chooses to enter the cooling mode, the control device 600 determines the second temperature measurement value as the actual temperature in the cavity 110.
  • the steam oven can provide a clear mode selection button for the user to choose which mode to enter, and can also determine which mode the user has chosen to enter by the user choosing to start the heating device 300 or the cooling device 400.
  • the temperature measurement value used for display and the temperature measurement value used for controlling the heating device 300 and/or the refrigeration device 400 may be different.
  • the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, the second temperature measurement value is displayed, but the first temperature measurement value is still used to control the heating device 300 and/or the refrigeration device 400. This can make the displayed temperature measurement value more accurate.
  • the heating device 300 can be controlled according to the actual temperature in an open-loop control manner.
  • the control device 600 detects the user's setting of the target temperature in the cavity 110
  • the actual temperature is compared with the target temperature, and the initial heating power and corresponding heating time of the heating device 300 are determined according to the comparison result, and then the heating device 300 is controlled to work at the initial heating power and heating time.
  • the heating device 300 is controlled to heat at 2KW for 5 minutes and then stop working.
  • the heating device 300 is controlled to heat at 2KW for 10 minutes and then stop working.
  • the heating device 300 can be controlled according to the actual temperature in a closed-loop control manner.
  • the control device 600 detects the user's setting of the target temperature in the cavity 110, the actual temperature is compared with the target temperature, and then the initial heating power and corresponding heating time of the heating device 300 are determined according to the comparison result.
  • the actual temperature is 30°C and the target temperature is 70°C.
  • the initial heating power is determined to be 2KW, and the heating time is 5 minutes.
  • the heating device 300 is controlled to start working at 2KW and start timing. During the heating and timing process, the actual temperature is compared with the target temperature. If the actual temperature rise rate is faster than expected, the heating power is reduced. If the actual temperature rise rate is slower than expected, the heating power is increased again. This process continues until the timing reaches 5 minutes.
  • the heating device 300 can also be controlled according to the actual temperature in a staged manner. Specifically, it can include a first heating stage, a second heating stage and a third heating stage, wherein the second heating stage can have one or more. The temperature difference between the target temperature and the actual temperature is monitored in all three stages.
  • the heating device 300 When the control device 600 detects the user's setting of the target temperature in the cavity 110, the heating device 300 is first controlled to enter the first heating stage. In the first heating stage, the heating device 300 is controlled to work at the first heating power, and the relationship between the temperature difference and the first threshold is obtained. When the temperature difference is greater than the first threshold, the first heating stage continues, and if the temperature difference is not greater than the first threshold, then the second heating stage is entered. In other words, when it is necessary to increase the temperature in the cavity 110, the heating device 300 is first controlled to work at the first heating power until the difference between the actual temperature and the target temperature is reduced to a certain extent before entering the next stage.
  • the first heating power can be a certain power that is pre-set.
  • the first heating power is the rated maximum power of the heating device 300, that is, after starting the heating device 300, the heating device 300 is first controlled to work at the rated maximum power to achieve rapid temperature rise.
  • the first heating power can also be determined based on the temperature difference, for example, the greater the temperature difference between the actual temperature and the target temperature, the greater the first heating power.
  • the comparison between the temperature difference and the first threshold value in the first heating stage is periodic, that is, the control device 600 compares the temperature difference with the first threshold value every time it controls the heating device 300 to operate at the first heating power for a preset time. If the temperature difference is greater than the first threshold value, the heating device 300 is controlled to operate at the first heating power for a preset time until the temperature difference is less than or equal to the first threshold value, then the second heating stage is entered.
  • the second heating stage can be one or more. Each second heating stage has a corresponding second threshold value and a second heating power.
  • the second heating power is less than the first heating power
  • the second threshold is less than the first threshold.
  • the control device 600 controls the heating device 300 to work at the second heating power, and obtains the relationship between the temperature difference and the second threshold.
  • the second heating stage continues, and when the temperature difference is less than the second threshold, the third heating stage is entered.
  • a second heating stage is equivalent to a weakened first heating stage. After the heating device 300 is started, it first works at a relatively large heating power, and then reduces the heating power. If the temperature difference meets the conditions after the heating power is reduced, the third heating stage is entered.
  • the multiple second heating powers are all less than the first heating power
  • the multiple second thresholds are all less than the first threshold
  • the second thresholds and second heating powers corresponding to different second heating stages are both decreasing.
  • the heating device 300 works at the second heating power corresponding to the second heating stage.
  • the temperature difference is less than the second threshold corresponding to the second heating stage, it enters the second heating stage with smaller corresponding second heating power and second threshold, until in the last second heating stage, if the temperature difference is less than the second threshold corresponding to the second heating stage, it enters the third heating stage. That is to say, in the process of the actual temperature rising, the heating power gradually decreases in stages, and the closer to the target temperature, the smaller the heating power.
  • the third heating stage is a stage where the actual temperature is closest to the target temperature, and the actual temperature needs to be adjusted more finely in this stage. Specifically, in the third heating stage, the temperature difference is used as input, and the PID algorithm is used to control the third heating power of the heating device 300 when it is working, so that the actual temperature reaches or approaches the target temperature, wherein the PID algorithm is a classic control algorithm and will not be described in detail here.
  • timing is also performed when entering the second heating stage.
  • the heating device 300 is controlled to directly enter the third heating stage.
  • One of the applicable scenarios of this embodiment is that there are too many ingredients in the cavity 110, and the second heating power is too small for the excessive ingredients, which will result in a long waiting time before entering the third heating stage from the second heating stage. Therefore, a first time threshold is set. If the stay time in the second heating stage reaches the first time threshold, it is judged that it is not suitable to stay in the second heating stage at this time, but directly enter the third heating stage. Since the third heating power in the third heating stage is controlled by the PID algorithm, the heating power can be adaptively changed to adapt to the current scenario, so that the actual temperature reaches the target temperature faster.
  • the following example illustrates controlling the heating device 300 according to the actual temperature in stages, wherein the actual temperature is 20°C, the target temperature is 100°C, the first heating power is the rated maximum power of 2KW, the first threshold is 60°C, and the preset duration is 10 seconds; there is only one second heating stage, the second heating power is 1KW, the second threshold is 20°C, and the first time threshold is 10 minutes.
  • the heating device 300 When the user sets the target temperature to 100°C, the heating device 300 operates at a heating power of 2KW for 10 seconds, and then compares whether the actual temperature has reached 40°C. If it has not reached 40°C, it operates at a heating power of 2KW for another 10 seconds, and repeats the comparison process. If it has reached 40°C, it heats with a heating power of 1KW and starts timing. If the actual temperature reaches 80°C within 10 minutes, the third heating stage is entered. If the actual temperature still has not reached 80°C after 10 minutes, the third heating stage is also entered.
  • control device 600 can also determine whether to issue an alarm prompt of over-temperature according to the actual temperature. For example, when the actual temperature is too high, an alarm is issued by sound, voice, light, etc.
  • the door 200 also has a lock structure. When the actual temperature is too high, the control device 600 controls the lock to close, and the user cannot open the door 200 to ensure the user's safety.
  • the control device 600 when the control device 600 detects that the user has set a cooling setting in the cavity 110, it determines whether to start the cooling device 400 according to the actual temperature.
  • the cooling setting can be triggered by the user by selecting to enter the cooling mode through a physical or virtual button.
  • the actual temperature is compared with the preset first cooling temperature threshold.
  • the cooling device 400 is started, otherwise, the cooling device 400 is stopped. In other words, cooling is performed only when the actual temperature meets certain conditions.
  • the first cooling temperature threshold is 40°C.
  • the cooling device 400 When it is higher than 40°C, the cooling device 400 is not started to prevent the air with too high temperature in the cavity 110 from entering the gas channel 450 and damaging the cooling device 400.
  • the process of controlling the start of the cooling device 400 can be as follows: first, the valve 420 is controlled to open the corresponding air guide port 111, and when the valve 420 is opened, the semiconductor cooling module 430 is started for cooling, and the fan 440 is controlled to rotate.
  • the control device 600 also determines whether to stop the operation of the refrigeration device 400 according to the actual temperature. Specifically, during the operation of the refrigeration device 400, the control device 600 compares the actual temperature with the preset second refrigeration temperature threshold. When the actual temperature is lower than the second refrigeration temperature threshold, the operation of the refrigeration device 400 is stopped, otherwise the operation of the refrigeration device 400 is not stopped.
  • the second refrigeration temperature threshold is 0°C, that is, when the actual temperature in the cavity 110 drops below zero, the refrigeration is temporarily stopped.
  • the temporary suspension of refrigeration can be temporarily not energizing the semiconductor refrigeration module 430 and controlling the fan 440 to temporarily stop rotating.
  • the refrigeration device 400 is started again. In this way, the temperature in the cavity 110 can be prevented from being too low.
  • the second temperature measurement value is used as the actual temperature
  • the process of the control device 600 controlling the cooling device 400 to work according to the actual temperature is as follows:
  • the control device 600 controls the cooling device 400 to work. During the operation, if the reading of the second temperature sensor 520 is less than the second cooling temperature threshold, the cooling device 400 is controlled to stop working until the reading of the second temperature sensor 520 reaches or exceeds the second cooling temperature threshold, and the control device 600 controls the cooling device 400 to start working again.
  • the refrigeration device 400 further includes a refrigeration fin 460 disposed in the gas channel 450 , and the refrigeration fin 460 is thermally connected to the cold end of the semiconductor refrigeration module 430 .
  • the refrigeration fin 460 has a larger contact area with the air in the gas channel 450 , thereby achieving a better refrigeration effect.
  • the steam oven also has an automatic defrosting function.
  • the temperature detection device 500 also includes a third temperature sensor 530, which is arranged on the refrigeration fins 460 to obtain a third temperature measurement value of the refrigeration fins 460.
  • the control device 600 monitors the relationship between the third temperature measurement value and the preset third refrigeration threshold value.
  • the semiconductor refrigeration module 430 is controlled to stop refrigeration, for example, temporarily stopping the power supply to the semiconductor refrigeration module 430.
  • the third temperature measurement value is continuously lower than the third cooling threshold value for a period of time that reaches the preset second time threshold value, it means that the cooling fin 460 is lower than a certain temperature for a long time, and it is very likely that the cooling fin 460 will be frosted.
  • the semiconductor refrigeration module 430 is controlled to stop cooling, but the fan 440 still keeps rotating, and the air in the cavity 110 is still sucked into the gas channel 450 from the air guide port 111.
  • the frost on the cooling fin 460 is slowly removed.
  • Another advantage of defrosting in the above manner is that it fully utilizes the thermal energy of the air in the cavity 110, has a high defrosting efficiency, and when the semiconductor refrigeration module 430 is not powered on, it still has a partial cooling effect on the cavity 110 for a short time. Since the air in the cavity 110 is originally to exchange heat energy in the gas channel 450 to achieve its own cooling, the thermal energy of this part of the air is relatively high, which is equivalent to using "hot air" to blow to the refrigeration fins 460. The natural defrosting efficiency is relatively high. During the defrosting process, the temperature of this part of the air also decreases to a certain extent. Therefore, even when the semiconductor refrigeration module 430 is not powered on, the cavity 110 can be cooled to a certain extent.
  • the cavity 110 is provided with a first temperature sensor 510 and a second temperature sensor 520. In other embodiments, more temperature sensors may be provided in the cavity 110. Similar to the above first temperature sensor 510 and the second temperature sensor 520, when more temperature sensors are provided in the cavity 110, each temperature sensor has a corresponding temperature sensitive range, and the measurement accuracy of each temperature sensor in the corresponding temperature sensitive range is higher than the measurement accuracy of other temperature sensors, and the temperature sensitive ranges corresponding to different temperature sensors do not intersect. Among them, the temperature sensitive range represents that the measurement accuracy of the temperature sensor is high within the temperature sensitive range.
  • one temperature sensor has the highest measurement accuracy at 0°C to 30°C, and its temperature sensitive range is 0°C to 30°C; another temperature sensor has the highest measurement accuracy at 40°C to 60°C, and its temperature sensitive range is 40°C to 60°C; another temperature sensor has the highest measurement accuracy at 70°C to 100°C, and its temperature sensitive range is 70°C to 100°C.
  • the temperature measurement sensitive range can be different from the temperature measurement range of the temperature sensor.
  • the temperature measurement ranges of the three temperature sensors can be the same, for example, the temperature measurement ranges of the three temperature sensors are all 0°C to 260°C or 0°C to 100°C.
  • the measurement accuracy here can be reflected by the error between the temperature sensor and the standard temperature measuring instrument.
  • each temperature sensor is a resistive sensor, the curves of the resistance of each temperature sensor changing with temperature are also different.
  • the cavity 110 includes at least two heating zones.
  • the heating rates of different heating zones are different.
  • Each temperature sensor is located in a heating zone.
  • the temperature measurement sensitive range corresponding to the temperature sensor in the heating zone with a fast heating rate is higher than the temperature measurement sensitive range corresponding to the temperature sensor in the heating zone with a slow heating rate, so that each temperature sensor obtains the corresponding temperature measurement value at an appropriate position in the cavity 110.
  • the temperature measurement sensitive range into which the temperature measurement value of the target temperature sensor falls is determined as the target temperature measurement sensitive range, and then the temperature measurement value of the temperature sensor corresponding to the target measurement sensitive range is determined as the actual temperature.
  • the target temperature sensor is a pre-selected temperature sensor. For example, there are three temperature sensors distributed up and down in the cavity 110, and the middle temperature sensor is pre-set as the target temperature sensor.
  • the temperature measurement value of the target temperature sensor falls into the temperature measurement sensitive range corresponding to the lowest temperature sensor, the temperature measurement value of the lowest temperature sensor is determined as the actual temperature, that is, the heating device 300 and/or the refrigeration device 400 is controlled according to the temperature measurement value of the lowest temperature sensor.
  • the temperature measurement values of multiple temperature sensors are compared with each temperature measurement sensitive range.
  • the temperature measurement value of the temperature sensor in the temperature measurement sensitive range is used as the actual temperature.
  • the temperature measurement value of the middle temperature sensor is determined as the actual temperature, that is, the heating device 300 and/or the refrigeration device 400 is controlled according to the temperature measurement value of the middle temperature sensor.
  • the temperature measurement values of multiple temperature sensors can also be compared with each temperature measurement sensitive range in the order of comparison of the temperature measurement sensitive range from low to high. In the comparison, when the number of temperature measurement values falling into a certain temperature measurement sensitive range exceeds a preset number threshold, the temperature measurement value of the temperature sensor in the temperature measurement sensitive range is used as the actual temperature, and the temperature measurement values of the multiple temperature sensors are no longer compared with other temperature measurement sensitive ranges.
  • a preset number threshold there are five temperature sensors distributed in the cavity 110, and the quantity threshold is 2. The five temperature measurement values are first compared with the first temperature measurement sensitive range in order from low to high. When two or more temperature measurement values fall within the first temperature measurement sensitive range, the temperature measurement value of the temperature sensor corresponding to the first temperature measurement sensitive range is determined as the actual temperature. Otherwise, the five temperature measurement values continue to be compared with the second temperature measurement sensitive range.
  • the actual temperature is obtained according to the temperature measurement values of at least two temperature sensors, for example, the actual temperature is calculated using the following formula:
  • Tr w1*T1+w2*T2+w3*T3...+wi*Ti;
  • Tr is the actual temperature
  • Ti is the temperature measurement value obtained by the i-th temperature sensor
  • wi is the weight coefficient corresponding to the i-th temperature sensor.
  • FIG5 provides a heating and cooling control method for the steam oven, including:
  • Step A100 obtaining a first temperature measurement value in the cavity 110 through the first temperature sensor 510 .
  • Step A200 obtaining a second temperature measurement value in the cavity 110 through the second temperature sensor 520 .
  • the first temperature sensor 510 and the second temperature sensor 520 themselves have the following differences: within the first temperature measurement sensitive range, the measurement accuracy of the first temperature sensor 510 is higher than that of the second temperature sensor 520, and within the second temperature measurement sensitive range different from the first temperature measurement sensitive range, the measurement accuracy of the second temperature sensor 520 is higher than that of the first temperature sensor 510.
  • the first temperature measurement sensitive range is 100°C to 200°C
  • the second temperature measurement sensitive range is 30°C to 80°C.
  • the first temperature measurement value obtained by the first temperature sensor 510 is more accurate
  • the second temperature measurement value obtained by the second temperature sensor 520 is more accurate.
  • the temperature measurement sensitive range is different from the temperature measurement range of the temperature sensor, and the first temperature sensor 510 and the second temperature sensor 520 can have the same temperature measurement range.
  • the measurement accuracy in different temperature measurement sensitive ranges can be reflected by the error between the first temperature measurement value and the reading of the standard temperature measuring instrument, that is, within the first temperature measurement sensitive range, the difference between the first temperature measurement value and the reading of the standard temperature measuring instrument is smaller than the difference between the second temperature measurement value and the reading of the standard temperature measuring instrument, and within the second temperature measurement sensitive range, the difference between the second temperature measurement value and the reading of the standard temperature measuring instrument is smaller than the difference between the first temperature measurement value and the reading of the standard temperature measuring instrument.
  • the measurement accuracy in different temperature sensitivity ranges can be distinguished by the curve of resistance changing with temperature, that is, the first curve of resistance changing with temperature of the first temperature sensor 510 is different from the second curve of resistance changing with temperature of the second temperature sensor 520.
  • Step A300 Determine the actual temperature in the cavity 110 according to at least one of the first temperature measurement value and the second temperature measurement value.
  • the actual temperature is determined in order to determine which of the first temperature measurement value and the second temperature measurement value is subsequently used to control heating and/or cooling. In some embodiments, when it is determined which temperature measurement value is used for corresponding control, the step of determining the actual temperature is naturally completed.
  • the lowest temperature value of the first temperature measurement sensitive range referred to below is greater than the highest temperature value of the second temperature measurement sensitive range, that is, the two temperature measurement sensitive ranges have no intersection and the first temperature measurement sensitive range is higher. It can be understood that the first temperature measurement sensitive range and the second temperature measurement sensitive range may also have an intersection or at least partially overlap. In addition, in this article, when the highest temperature value in the second temperature measurement sensitive range is less than the highest temperature value in the first temperature measurement sensitive range, it is defined that the second temperature measurement sensitive range is lower than the first temperature measurement sensitive range.
  • the control device 600 compares the first temperature measurement value and/or the second temperature measurement value with the second temperature measurement sensitive range.
  • the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, the second temperature measurement value is determined as the actual temperature, or the heating device 300 and/or the refrigeration device 400 is controlled according to the second temperature measurement value; when the first temperature measurement value and/or the second temperature measurement value are not within the second temperature measurement sensitive range, the first temperature measurement value is determined as the actual temperature, or the heating device 300 and/or the refrigeration device 400 is controlled according to the first temperature measurement value.
  • the control device 600 compares the first temperature measurement value and/or the second temperature measurement value with the second temperature measurement sensitive range. When the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, the second temperature measurement value is determined as the actual temperature. If the first temperature measurement value and/or the second temperature measurement value are not within the second temperature measurement sensitive range, the first temperature measurement value and/or the second temperature measurement value are compared with the first temperature measurement sensitive range. When the first temperature measurement value and/or the second temperature measurement value are within the first temperature measurement sensitive range, the first temperature measurement value is determined as the actual temperature.
  • the method for determining the actual temperature by combining the first temperature measurement value and the second temperature measurement value can be: multiplying the first weight coefficient by the first temperature measurement value, multiplying the second weight coefficient by the second temperature measurement value, and then adding the two products to obtain the actual temperature, wherein the first weight coefficient and the second weight coefficient can be obtained based on experience.
  • the second temperature measurement value is compared with the second temperature measurement sensitive range.
  • the second temperature measurement value is determined as the actual temperature.
  • the first temperature measurement value is compared with the first temperature measurement sensitive range.
  • the first temperature measurement value is determined as the actual temperature. If the second temperature measurement value is not within the second temperature measurement sensitive range and the first temperature measurement value is also not within the first temperature measurement sensitive range, it is necessary to combine the first temperature measurement value and the second temperature measurement value to determine the actual temperature.
  • the logic for determining the actual temperature is to first check whether the reading of the temperature sensor (second temperature sensor 520) corresponding to the low temperature is credible. When the second temperature measurement value is within the second temperature measurement sensitive range, it indicates that it is credible, and the reading of the temperature sensor is directly used. When the second temperature measurement value is not within the second temperature measurement sensitive range, it indicates that it is unreliable. Then check whether the reading of the temperature sensor (first temperature sensor 510) corresponding to the high temperature is credible. If it is credible, the reading of the temperature sensor is directly used. If it is unreliable, the readings of both temperature sensors are not directly used.
  • the method for determining the actual temperature by combining the first temperature measurement value and the second temperature measurement value can be: multiplying the first weight coefficient by the first temperature measurement value, multiplying the second weight coefficient by the second temperature measurement value, and then adding the two products to obtain the actual temperature, wherein the first weight coefficient and the second weight coefficient can be obtained based on experience.
  • the above process of determining the actual temperature is confirmed from low temperature to high temperature. In other embodiments, it can also be confirmed from high temperature to low temperature, that is, first comparing the first temperature measurement value with the first temperature measurement sensitive range. When the first temperature measurement value is within the first temperature measurement sensitive range, the first temperature measurement sensitive range is directly used as the actual temperature.
  • the steam oven has two temperature control modes, namely, a heating mode and a cooling mode, and the user can choose to enable the heating mode or the cooling mode.
  • the first temperature measurement value is determined as the actual temperature in the cavity 110
  • the second temperature measurement value is determined as the actual temperature in the cavity 110.
  • the steam oven can provide a clear mode selection button for the user to choose which mode to enter, and can also determine which mode the user has chosen to enter by the user choosing to start the heating device 300 or the cooling device 400.
  • the actual temperature can also be displayed, that is, the temperature measurement value used to control heating and/or cooling can be displayed, so that the user can understand which temperature measurement value is currently used for control.
  • the displayed temperature measurement value and the temperature measurement value used to control heating and/or cooling can also be different. For example, in the above heating mode, the first temperature measurement value is used to control heating, but when the first temperature measurement value and/or the second temperature measurement value are within the second temperature measurement sensitive range, it indicates that heating is currently being performed in a low temperature environment, so the second temperature measurement value is still displayed, which can make the displayed temperature measurement value more accurate.
  • Step A400 Control heating and/or cooling of the cavity 110 according to the actual temperature.
  • the steam oven is heated by the heating device 300 in the cavity 110 as an example.
  • the structure of the heating device 300 can refer to the above description, and other structures of the heating device 300 can also be used.
  • an open-loop control method can be used to control the heating of the cavity 110 according to the actual temperature.
  • the actual temperature is compared with the target temperature, and the initial heating power and corresponding heating time of the heating device 300 are determined according to the comparison result, and then the heating device 300 is controlled to work at the initial heating power and heating time.
  • the heating device 300 is controlled to heat at 2KW for 5 minutes and then stop working.
  • the heating device 300 is controlled to heat at 2KW for 10 minutes and then stop working.
  • a closed-loop control method can be used to control the heating of the cavity 110 according to the actual temperature.
  • the actual temperature is compared with the target temperature, and then the initial heating power and corresponding heating time of the heating device 300 are determined according to the comparison result.
  • the actual temperature is 30°C and the target temperature is 70°C.
  • the initial heating power is determined to be 2KW, and the heating time is 5 minutes.
  • the heating device 300 is controlled to start working at 2KW and start timing. During the heating and timing process, the actual temperature is compared with the target temperature. If the actual temperature rise rate is faster than expected, the heating power is reduced. If the actual temperature rise rate is slower than expected, the heating power is increased again. This process continues until the timing reaches 5 minutes.
  • the heating of the cavity 110 can also be controlled in stages according to the actual temperature. Specifically, it can include a first heating stage, a second heating stage, and a third heating stage, wherein the second heating stage can have one or more. The temperature difference between the target temperature and the actual temperature is monitored in all three stages.
  • the heating device 300 When the user sets the target temperature in the cavity 110, the heating device 300 is first controlled to enter the first heating stage. In the first heating stage, the heating device 300 is controlled to work at the first heating power, and the relationship between the temperature difference and the first threshold is obtained. When the temperature difference is greater than the first threshold, the first heating stage continues, and if the temperature difference is not greater than the first threshold, the second heating stage is entered. In other words, when the temperature in the cavity 110 needs to be increased, the heating device 300 is first controlled to work at the first heating power until the difference between the actual temperature and the target temperature is reduced to a certain extent before entering the next stage.
  • the first heating power can be a certain power that is pre-set.
  • the first heating power is the rated maximum power of the heating device 300, that is, after the heating device 300 is started, the heating device 300 is first controlled to work at the rated maximum power to achieve rapid heating.
  • the first heating power can also be determined based on the temperature difference, for example, the greater the temperature difference between the actual temperature and the target temperature, the greater the first heating power.
  • the comparison between the temperature difference and the first threshold value in the first heating stage is periodic, that is, each time the heating device 300 is controlled to operate at the first heating power for a preset period of time, the temperature difference is compared with the first threshold value. If the temperature difference is greater than the first threshold value, the heating device 300 is controlled to operate at the first heating power for a preset period of time, until the temperature difference is less than or equal to the first threshold value, then the second heating stage is entered.
  • the second heating stage can be one or more. Each second heating stage has a corresponding second threshold value and a second heating power.
  • the second heating power is less than the first heating power
  • the second threshold is less than the first threshold. Similar to the first heating stage, in the second heating stage, the heating device 300 is controlled to work at the second heating power, and the relationship between the temperature difference and the second threshold is obtained. When the temperature difference is greater than the second threshold, the second heating stage is continued, and when the temperature difference is less than the second threshold, the third heating stage is entered. In other words, a second heating stage is equivalent to a weakened first heating stage. After the heating device 300 is started, it first works at a relatively large heating power, and then reduces the heating power. If the temperature difference meets the condition after the heating power is reduced, the third heating stage is entered.
  • the multiple second heating powers are all less than the first heating power
  • the multiple second thresholds are all less than the first threshold
  • the second thresholds and second heating powers corresponding to different second heating stages are both decreasing.
  • the heating device 300 works at the second heating power corresponding to the second heating stage.
  • the temperature difference is less than the second threshold corresponding to the second heating stage, it enters the second heating stage with smaller corresponding second heating power and second threshold, until the last second heating stage, if the temperature difference is less than the second threshold corresponding to the second heating stage, it enters the third heating stage. That is to say, in the process of the actual temperature rising, the heating power gradually decreases in stages, and the closer to the target temperature, the smaller the heating power.
  • the third heating stage is a stage where the actual temperature is closest to the target temperature, and the actual temperature needs to be adjusted more finely in this stage. Specifically, in the third heating stage, the temperature difference is used as input, and the PID algorithm is used to control the third heating power of the heating device 300 when it is working, so that the actual temperature reaches or approaches the target temperature, wherein the PID algorithm is a classic control algorithm and will not be described in detail here.
  • timing is also performed when entering the second heating stage.
  • the heating device 300 is controlled to directly enter the third heating stage.
  • One of the applicable scenarios of this embodiment is that there are too many ingredients in the cavity 110, and the second heating power is too small for the excessive ingredients, which will result in a long waiting time before entering the third heating stage from the second heating stage. Therefore, a first time threshold is set. If the stay time in the second heating stage reaches the first time threshold, it is judged that it is not suitable to stay in the second heating stage at this time, but directly enter the third heating stage. Since the third heating power in the third heating stage is controlled by the PID algorithm, the heating power can be adaptively changed to adapt to the current scenario, so that the actual temperature reaches the target temperature faster.
  • the following example illustrates controlling the heating device 300 according to the actual temperature in stages, wherein the actual temperature is 20°C, the target temperature is 100°C, the first heating power is the rated maximum power of 2KW, the first threshold is 60°C, and the preset duration is 10 seconds; there is only one second heating stage, the second heating power is 1KW, the second threshold is 20°C, and the first time threshold is 10 minutes.
  • the heating device 300 When the user sets the target temperature to 100°C, the heating device 300 operates at a heating power of 2KW for 10 seconds, and then compares whether the actual temperature has reached 40°C. If it has not reached 40°C, it operates at a heating power of 2KW for another 10 seconds, and repeats the comparison process. If it has reached 40°C, it heats with a heating power of 1KW and starts timing. If the actual temperature reaches 80°C within 10 minutes, the third heating stage is entered. If the actual temperature still has not reached 80°C after 10 minutes, the third heating stage is also entered.
  • the following describes how to control the refrigeration in the cavity 110 according to the actual temperature, and takes the refrigeration of the steam oven through the refrigeration device 400 as an example.
  • the structure of the refrigeration device 400 can refer to the above description, and other structures of the refrigeration device 400 can also be used.
  • the cooling device 400 when it is detected that the user has set a cooling setting in the cavity 110, it is determined whether to start the cooling device 400 according to the actual temperature.
  • the actual temperature is compared with the preset first cooling temperature threshold.
  • the first cooling temperature threshold is 40°C.
  • the cooling device 400 is not started to prevent the air with too high temperature in the cavity 110 from entering the gas channel 450 and damaging the cooling device 400.
  • the actual temperature is compared with the preset second refrigeration temperature threshold.
  • the second refrigeration temperature threshold is 0°C, that is, when the actual temperature in the cavity 110 drops below zero, the refrigeration is temporarily stopped.
  • FIG6 provides a heating and cooling control method for the steam oven, including:
  • Step B100 obtaining a temperature measurement value in the cavity 110 through each of at least two temperature sensors.
  • each temperature sensor has a corresponding temperature measurement sensitive range, and the measurement accuracy of each temperature sensor in the corresponding temperature measurement sensitive range is higher than the measurement accuracy of other temperature sensors, and the temperature measurement sensitive ranges corresponding to different temperature sensors do not intersect.
  • the temperature measurement sensitive range represents that the measurement accuracy of the temperature sensor is high within the temperature measurement sensitive range.
  • one temperature sensor has the highest measurement accuracy at 0°C to 30°C, and its temperature measurement sensitive range is 0°C to 30°C; another temperature sensor has the highest measurement accuracy at 40°C to 60°C, and its temperature measurement sensitive range is 40°C to 60°C; and another temperature sensor has the highest measurement accuracy at 70°C to 100°C, and its temperature measurement sensitive range is 70°C to 100°C.
  • the temperature measurement sensitive range can be different from the temperature measurement range of the temperature sensor.
  • the temperature measurement ranges of the three temperature sensors can be the same, for example, the temperature measurement ranges of the three temperature sensors are all 0°C to 260°C or 0°C to 100°C.
  • the measurement accuracy here can be reflected by the error between the temperature sensor and the standard temperature measuring instrument.
  • each temperature sensor is a resistive sensor, the curves of the resistance of each temperature sensor changing with temperature are also different.
  • Step B200 determining the actual temperature in the cavity 110 according to the temperature measurement value of at least one temperature sensor.
  • the temperature measurement sensitive range within which the temperature measurement value of the target temperature sensor falls is determined as the target temperature measurement sensitive range, and then the temperature measurement value of the temperature sensor corresponding to the target measurement sensitive range is determined as the actual temperature.
  • the target temperature sensor is a pre-selected temperature sensor. For example, there are three temperature sensors distributed up and down in the cavity 110, and the middle temperature sensor is pre-set as the target temperature sensor.
  • the temperature measurement value of the target temperature sensor falls within the temperature measurement sensitive range corresponding to the bottom temperature sensor, the temperature measurement value of the bottom temperature sensor is determined as the actual temperature, that is, the heating device 300 and/or the refrigeration device 400 is controlled according to the temperature measurement value of the bottom temperature sensor.
  • the temperature measurement values of multiple temperature sensors are compared with each temperature measurement sensitive range.
  • the temperature measurement value of the temperature sensor in the temperature measurement sensitive range is used as the actual temperature.
  • the temperature measurement value of the middle temperature sensor is determined as the actual temperature, that is, the heating device 300 and/or the refrigeration device 400 is controlled according to the temperature measurement value of the middle temperature sensor.
  • the temperature measurement values of multiple temperature sensors can also be compared with each temperature measurement sensitive range in the order of comparison of the temperature measurement sensitive range from low to high. In the comparison, when the number of temperature measurement values falling into a certain temperature measurement sensitive range exceeds a preset number threshold, the temperature measurement value of the temperature sensor in the temperature measurement sensitive range is used as the actual temperature, and the temperature measurement values of the multiple temperature sensors are no longer compared with other temperature measurement sensitive ranges.
  • a preset number threshold there are five temperature sensors distributed in the cavity 110, and the quantity threshold is 2. The five temperature measurement values are first compared with the first temperature measurement sensitive range in order from low to high. When two or more temperature measurement values fall within the first temperature measurement sensitive range, the temperature measurement value of the temperature sensor corresponding to the first temperature measurement sensitive range is determined as the actual temperature. Otherwise, the five temperature measurement values continue to be compared with the second temperature measurement sensitive range.
  • the actual temperature is obtained according to the temperature measurement values of at least two temperature sensors, for example, the actual temperature is calculated using the following formula:
  • Tr w1*T1+w2*T2+w3*T3...+wi*Ti;
  • Tr is the actual temperature
  • Ti is the temperature measurement value obtained by the i-th temperature sensor
  • wi is the weight coefficient corresponding to the i-th temperature sensor.
  • Step B300 Control heating and/or cooling of the cavity 110 according to the actual temperature.
  • Step B300 is similar to the above-mentioned step A400 and will not be described in detail here.
  • the steam oven and the heating and cooling control method thereof of the above-mentioned embodiment can obtain a more accurate actual temperature in the cavity, and can adopt a variety of heating schemes to meet cooking needs.
  • the refrigeration device can also be automatically defrosted, thereby improving the reliability of the steam oven.
  • any tangible, non-transitory computer-readable storage medium may be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu-Ray disks, etc.), flash memory, and/or the like.
  • These computer program instructions may be loaded onto a general-purpose computer, a special-purpose computer, or other programmable data processing device to form a machine, such that the instructions executed on the computer or other programmable data processing device may generate a device that implements a specified function.
  • These computer program instructions may also be stored in a computer-readable memory, which may instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable memory may form an article of manufacture, including an implementation device that implements a specified function.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing device, thereby executing a series of operating steps on the computer or other programmable device to produce a computer-implemented process, such that the instructions executed on the computer or other programmable device may provide steps for implementing a specified function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne un cuiseur à vapeur mixte et un procédé de commande de chauffage/refroidissement associé. Le procédé consiste à : acquérir une première valeur de température mesurée dans une cavité (110) dans un cuiseur à vapeur mixte au moyen d'un premier capteur de température (510), la cavité (110) étant utilisée pour recevoir des matières alimentaires ; acquérir une seconde valeur de température mesurée dans la cavité (110) au moyen d'un second capteur de température (520), dans une première plage sensible de mesure de température, la précision de mesure du premier capteur de température étant supérieure à la précision de mesure du second capteur de température, et dans une seconde plage sensible de mesure de température différente de la première plage sensible de mesure de température, la précision de mesure du second capteur de température (520) étant supérieure à la précision de mesure du premier capteur de température ; et déterminer une température réelle dans la cavité (110) en fonction de la première valeur de température mesurée et/ou de la seconde valeur de température mesurée, et commander le chauffage et/ou le refroidissement de la cavité (110) en fonction de la température réelle. Le cuiseur à vapeur mixte peut obtenir une température réelle plus précise en fonction des deux valeurs de température mesurées, et le chauffage ou le refroidissement effectué sur la base de la température réelle peut apporter un meilleur effet de cuisson.
PCT/CN2022/126537 2022-10-20 2022-10-20 Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé WO2024082241A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/126537 WO2024082241A1 (fr) 2022-10-20 2022-10-20 Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/126537 WO2024082241A1 (fr) 2022-10-20 2022-10-20 Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé

Publications (1)

Publication Number Publication Date
WO2024082241A1 true WO2024082241A1 (fr) 2024-04-25

Family

ID=90736570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/126537 WO2024082241A1 (fr) 2022-10-20 2022-10-20 Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé

Country Status (1)

Country Link
WO (1) WO2024082241A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945018A (en) * 1995-06-15 1999-08-31 Aktiebolaget Electrolux Control system for an oven having multiple heating sources for the preparation of food
WO2009043925A1 (fr) * 2007-10-05 2009-04-09 Universita' Degli Studi Di Padova Dispositif à plasma pour traiter des tissus vivants
CN103257596A (zh) * 2012-02-20 2013-08-21 杨俊新 电器控制方法和电器
CN105395093A (zh) * 2015-12-28 2016-03-16 北京小焙科技有限公司 一种电烤箱及其控制方法和控制装置
CN105902186A (zh) * 2016-06-15 2016-08-31 宁波方太厨具有限公司 一种烤箱及其工作方法
US20170303381A1 (en) * 2015-01-12 2017-10-19 Applied Plasma, LLC Plasma device with a replaceable (plug-in) discharge tube
US20170351278A1 (en) * 2016-06-06 2017-12-07 Alto-Shaam, Inc. Food Service Oven with Multipoint Temperature Monitoring
CN108489634A (zh) * 2018-03-16 2018-09-04 张利 一种温度标签无线测温装置及方法
CN108903677A (zh) * 2018-08-01 2018-11-30 杭州老板电器股份有限公司 烤箱及烤箱的控制方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5945018A (en) * 1995-06-15 1999-08-31 Aktiebolaget Electrolux Control system for an oven having multiple heating sources for the preparation of food
WO2009043925A1 (fr) * 2007-10-05 2009-04-09 Universita' Degli Studi Di Padova Dispositif à plasma pour traiter des tissus vivants
CN103257596A (zh) * 2012-02-20 2013-08-21 杨俊新 电器控制方法和电器
US20170303381A1 (en) * 2015-01-12 2017-10-19 Applied Plasma, LLC Plasma device with a replaceable (plug-in) discharge tube
CN105395093A (zh) * 2015-12-28 2016-03-16 北京小焙科技有限公司 一种电烤箱及其控制方法和控制装置
US20170351278A1 (en) * 2016-06-06 2017-12-07 Alto-Shaam, Inc. Food Service Oven with Multipoint Temperature Monitoring
CN105902186A (zh) * 2016-06-15 2016-08-31 宁波方太厨具有限公司 一种烤箱及其工作方法
CN108489634A (zh) * 2018-03-16 2018-09-04 张利 一种温度标签无线测温装置及方法
CN108903677A (zh) * 2018-08-01 2018-11-30 杭州老板电器股份有限公司 烤箱及烤箱的控制方法

Similar Documents

Publication Publication Date Title
KR102324189B1 (ko) 조리기기 및 그 제어방법
US9841261B2 (en) Combination oven with peak power control
CN104503508B (zh) 一种太阳电池测试台温控***及温控方法
JP2012239535A (ja) ヘアドライヤ
US20190327795A1 (en) Oven appliance with direct temperature measurement and related methods
WO2020199323A1 (fr) Dispositif de commande de température de tube radiant à chauffage électrique et son procédé de commande
WO2024082768A1 (fr) Procédé et appareil de régulation de la température d'un dispositif de chauffage, dispositif de chauffage et support de stockage
WO2024082241A1 (fr) Cuiseur à vapeur mixte et procédé de commande de chauffage/refroidissement associé
WO2021077576A1 (fr) Procédé de détection, appareil de cuisson, système de cuisson et support de stockage lisible par ordinateur
US20160116171A1 (en) Oven airflow control
EP3324131A1 (fr) Procédé de régulation d'un appareil de chauffage électrique et appareil de chauffage associé
CN109613414B (zh) 可控制高温环境老化寿命试验箱温度变化过程的方法及***
JP2003083658A (ja) 冷却貯蔵庫
WO2024082237A1 (fr) Procédé de contrôle d'humidité dans un four à vapeur, et four à vapeur
EP1941222A1 (fr) Procede de commande d'une cellule de refroidissement rapide d'un produit issu de cuisson en vue de sa conservation
EP2092827B1 (fr) Procédé pour effectuer un processus de cuisson automatique
CN204227815U (zh) 冰箱的控制***及具有其的冰箱
WO2011089920A1 (fr) Dispositif de réchauffement haute-fréquence
CN111358305A (zh) 电饭煲及其控制方法
JP6282683B2 (ja) 食品冷蔵加熱庫
KR101866557B1 (ko) 스팀 오븐의 대류팬 제어 시스템 및 방법
CN111706985A (zh) 基于温度变化率的空调使用空间测量方法
JP2001193941A (ja) 加熱調理器
CN110089919B (zh) 一种煮饭装置控制方法及其煮饭装置
KR20150086883A (ko) 냉장고의 도어 히터 제어 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22962428

Country of ref document: EP

Kind code of ref document: A1