CN110754958A - Scanning type infrared temperature measurement structure and application method thereof on electric heating cooking utensil - Google Patents
Scanning type infrared temperature measurement structure and application method thereof on electric heating cooking utensil Download PDFInfo
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- CN110754958A CN110754958A CN201910603913.5A CN201910603913A CN110754958A CN 110754958 A CN110754958 A CN 110754958A CN 201910603913 A CN201910603913 A CN 201910603913A CN 110754958 A CN110754958 A CN 110754958A
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- 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
- A47J36/2483—Warming devices with electrical heating means
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- 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
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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- 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
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
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- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Cookers (AREA)
Abstract
The invention relates to a scanning infrared temperature measurement structure and an application method thereof on an electric heating cooking utensil. The scanning type infrared temperature measurement structure and the application method thereof on the electric heating cooking appliance can drive the infrared temperature measurement sensor to scan the temperature of the outer wall of a pot through the driving device, the central processing unit analyzes and processes temperature data, the cooking intention of a user is compared with a mathematical model established by the central processing unit, the cooking method of the user is identified, a control method suitable for the cooking process is selected, the working state of the electric heating device is controlled by the control panel, a manufacturer of the electric heating cooking appliance does not need to set too many cooking model selection keys, the electric heating cooking appliance only needs to be started by one key, the cooking intention of the user is automatically identified, and the corresponding cooking process is automatically completed. Thereby reducing the operation difficulty and improving the use comfort of the user.
Description
Technical Field
The invention relates to the technical field of intelligent household appliances, in particular to a scanning type infrared temperature measurement structure and an application method thereof on an electric heating cooking appliance.
Background
With the pace of modern life acceleration, people are eager for improving the quality of life and accelerating the aging of the population, and people need to have better products to meet the requirements of intelligent life.
When the existing household electric heating cooking appliance carries out cooking operation, the cooking mode and the cooking time are all set by a preset program, all the settings need to be reflected on a switch board, the set mode and the set time are fixed, the real cooking condition of a user cannot be correctly judged, and the phenomena of soup overflow and the like cannot be intervened in advance in the cooking process.
Some products place the temperature sensor in the bottom of pan to try to reach the purpose of preventing dry combustion, but this is judged with the mode that satisfies the threshold value, and after reaching this threshold value, the control panel has the action, but its culinary art process has failed, and the result of action is only the problem of assisting in the aspect of the safety. Especially, when the number of function keys on the switch board is too large, the operation difficulty is certain for the old.
In the actual control process of the traditional electric cooker, a control panel needs to judge whether a user covers a cooker cover or not, and the method is to add a thermistor on the cooker cover to judge whether the cooker cover is covered or not. The principle is as follows: when the pot cover is covered, the temperature detected by the sensor is higher due to the existence of water vapor, and when the pot cover is opened, the temperature detected by the sensor is lower, so that the control board judges whether the pot cover is closed or not and controls the heating method.
Disclosure of Invention
The invention aims to solve the technical problems that the cooking mode of a user cannot be automatically judged and intelligent detection suitable for cooking habits of different users cannot be realized in the using process of the conventional electric heating cooking appliance.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a scanning formula infrared ray temperature measurement structure, including the pot body, one side of the pot body vertically install the lift transmission subassembly, the lift transmission subassembly on install the infrared temperature sensor who has central processing unit, infrared temperature sensor go on the oscilaltion and scan the outer wall of the pot body, pot body externally mounted have electric heater unit, still include the control panel that links to each other with electric heater unit, lift transmission subassembly and infrared temperature sensor.
As a supplement, the lifting transmission assembly comprises a driving screw rod vertically arranged and a driving motor arranged at the end part of the driving screw rod, the driving screw rod is sleeved with an infrared temperature sensor with a central processing unit, and the infrared temperature sensor is enabled to move up and down through the rotation of the driving screw rod.
And as supplement, the outer side wall of the pot body is subjected to oxidation blackening treatment.
Preferably, the infrared temperature sensor is an analog single-point infrared temperature measuring sensor, the model is STC9CF5, and the number of the infrared temperature sensors is one.
Preferably, the electric heating device is controlled by a pulse width modulation method.
Further, the driving motor is a stepping motor, and the stepping angle is 1.8 degrees.
Preferably, the electric heating cooking appliance is a household electric cooker.
An application method of a scanning infrared temperature measurement structure on an electric heating cooking appliance comprises the following steps:
s1: after receiving the starting instruction, the control panel sends an instruction to the electric heating device, the electric heating device works at full power, and meanwhile, the driving motor moves the infrared temperature sensor to the bottom to collect the temperature of the low position of the pot body;
s2: the central processing unit processes the temperature acquired by the infrared temperature sensor, if the temperature is found to accord with the empty pot model, a command of stopping working is sent to the control panel, and if the mathematical model of the temperature is found to accord with normal cooking, a normal working command is sent to the control panel;
s3: the control panel sends a working instruction to the driving motor after receiving a normal working instruction of the central processing unit, the infrared temperature sensor is driven by the driving motor and the transmission screw rod to scan the temperature of the outer wall of the pot body up and down, and the infrared temperature sensor is responsible for sending collected temperature data to the central processing unit;
s4, the central processing unit carries out data analysis on the collected temperature data, and compares the data with the established mathematical cooking model to judge the cooking mode of the user;
s5, the central processing unit sends an instruction to the cooking model to the control panel, and the control panel controls the working mode of the electric heating device;
and S6, when the central processing unit judges that the cooking process is finished through the collected data, the central processing unit sends an instruction of finishing the cooking process to the control panel, and the driving motor is reset at the same time.
The cooking mathematical model comprises a soup cooking mathematical model, a rice steaming mathematical model, a soup overflowing mathematical model and an empty pot mathematical model.
The temperature data collected in step S1 includes the infrared field temperature and the sensor body temperature.
Has the advantages that: the invention relates to a scanning infrared temperature measurement structure and an application method thereof on an electric heating cooking utensil, and has the following beneficial effects that the method can accurately judge the position of the liquid level in a cooking container, accurately identify the cooking mode, compare a central processing unit with a preset mathematical model, output an instruction to a control panel, and timely control the progress of the whole cooking process by the control panel, wherein the operation action of a user in the whole process is only one action of pressing a start key without other operations, and the subsequent work is controlled by an infrared temperature sensor and the control panel, so that the method is very convenient.
Drawings
FIG. 1 is a control circuit diagram of the present invention;
FIG. 2 is a schematic structural view of the cooking appliance of the present invention;
fig. 3 is a schematic diagram of the circuit control of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 1-3, the embodiment of the invention relates to a scanning type infrared temperature measurement structure, which comprises a pot body 1, wherein a lifting transmission assembly is vertically arranged on one side of the pot body 1, an infrared temperature sensor 2 with a central processing unit is arranged on the lifting transmission assembly, the infrared temperature sensor 2 is lifted up and down and scans the outer wall of the pot body 1, an electric heating device is arranged outside the pot body 1, and the scanning type infrared temperature measurement structure further comprises a control panel 3 connected with the electric heating device, the lifting transmission assembly and the infrared temperature sensor 2.
The lifting transmission assembly comprises a vertically arranged transmission screw rod 4 and a driving motor 5 arranged at the end part of the transmission screw rod 4, the transmission screw rod 4 is sleeved with an infrared temperature sensor 2 with a central processing unit, and the infrared temperature sensor 2 is enabled to move up and down through the rotation of the transmission screw rod 4.
The outer side wall of the pot body 1 is subjected to oxidation blackening treatment so as to better collect the temperature of the outer wall of the pot.
The infrared temperature sensor 7 is an analog single-point infrared temperature measuring sensor, the model is STC9CF5, and the number is one.
Preferably, the electric heating device is controlled by a pulse width modulation method, which is a PWM control technique, and is the most widely used control method in power electronics technology due to its advantages of simple control, flexibility and good dynamic response.
The driving motor 5 is a stepping motor, and the stepping angle is 1.8 degrees.
The electric heating cooking appliance may be a domestic electric rice cooker when in use.
As a specific embodiment of the present invention:
taking the process of cooking rice by an electric rice cooker in family life as an example, in the normal operation process, a user puts the rice of [ a1] and water with a certain proportion into the cooker body 1 of the electric rice cooker, covers the cover and opens the switch to start the process of cooking rice. Since each operation of everyone has deviation, the deviation is reflected on the mixing ratio of rice and water, after a user starts a switch, the heating plate carries out heating operation, the pot body 1 conducts the absorbed heat to the rice-water mixture in the pot, and the process can be understood as the heat exchange process. At normal atmospheric pressure, water has a fixed boiling point and a higher specific heat value, and where a mixture of rice and water exists, the temperature of the vertical surface of the pot body in the area is the same due to the existence of water, namely, the area has an isothermal area. In the place where no water exists, the temperature of the pot body 1 loses the isothermal zone and exists in a gradient way.
The specific heat of water is high, the amount of water in the pot body 1 determines the temperature rise speed of the pot body on the time axis, the size of the pot of each electric cooker is fixed, the pot is determined well when a manufacturer produces the electric cooker, and the only variable is the amount of water. When the rice is cooked, the water accounts for a small amount, namely the temperature rising rate of the cooker is high, and the subjective intention of the user, namely the cooking process of the user can be judged through the temperature rising rate.
The complete workflow is as follows: after the user starts the electric cooker, the control panel 3 sends a full-power working instruction to the heating plate, and the heating plate works and conducts heat to the cooker. Meanwhile, the control panel 3 also sends a working instruction to the infrared temperature measuring sensor 2 and the driving motor 5 to drive the infrared temperature measuring sensor 2 to scan the outside temperature of the cookware. In the process of temperature rise, the height of the water level is determined by a method of searching a temperature boundary surface, when the temperature of the surface of the pot is stable on the boundary surface, the boiling of water can be judged, at the moment, a temperature scanning system only needs to scan on the temperature boundary layer, the falling rate of the water level is judged by a central processing unit according to the synchronous combination data of a sensor and a scanning driving system. And the central processing unit is combined with the set mathematical model to control the heating process. When the temperature boundary layer is constant, the water content higher than that of the rice can be judged to be completely disappeared, and at the moment, the temperature scanning system carries out temperature fixed-point measurement at the lower part of the pot. When the rice is heated continuously, the absorbed water can be lost through an evaporation method, after the free water is evaporated, the temperature on the surface of the cooker begins to rise, and at the moment, a control panel outputs a heating stopping instruction to finish the cooking process.
When a user carries out a soup cooking operation, the water consumption is relatively large, so that the temperature rise gradient in unit time is obviously different from that of the rice steaming. In the aspect of controlling the dynamic heating process, only water in the mixture of the food materials and the water is evaporated in the form of water vapor, the water level is in a descending form in the evaporation process, the descending rate in unit time determines the length of the soup cooking time, and the central processing unit controls the descending rate of the whole water level and calculates the proper termination time. In the soup cooking state, under the condition that the pot cover is covered, a temperature interval which is obviously higher than the temperature interval below a boundary layer is generated above a temperature boundary layer of a mixture of water and rice due to the existence of water vapor, the temperature higher than an isothermal area exists above the boundary layer due to the fact that the enthalpy of the water vapor is higher than that of water, and the state of the pot cover can be identified after the sensor collects the existence of the temperature. Under the condition that the pot cover is covered, if the heating power is too high, the situation of soup overflow is very easy to happen in the soup cooking process, and in order to prevent the soup overflow phenomenon, a user often uses the mode of opening the pot cover to cook soup. According to the technical scheme, the control panel can directly select proper heating power to meet the soup cooking requirement of a user, so that soup overflow during soup cooking is prevented, and manual excessive intervention is not needed.
And under the condition that food materials are not put into the pot, after a user presses a start key, the control panel sends a heating instruction to the heating disc, the temperature of the pot body rises sharply in unit time due to the fact that heat absorption of the food materials and water is lost, the temperature rise slope in unit time is obviously different from that of soup making and rice steaming, the change process of the temperature is collected by the infrared temperature measuring sensor and transmitted to the central processing unit, the central processing unit identifies according to the established mathematical model and feeds back an idle burning instruction to the control panel, the control panel sends an instruction of stopping working to the heating disc, and misoperation of the user is finished.
The cooking method has the advantages that the manufacturer of the cookware does not need to set too many cooking model selection keys, only needs one key to start, automatically identifies the cooking intention of the user, and automatically finishes the corresponding cooking process. Thereby reducing the operation difficulty and improving the use comfort of the user.
The original contents are as follows:
taking the process of cooking rice by an electric rice cooker in family life as an example, in the normal operation process, a user adds a certain proportion of water into the washed rice and puts the water into the cooker body 1 of the electric rice cooker, covers the cover and opens the switch to start the process of cooking rice. Since each operation of everyone has deviation, the deviation is reflected on the mixing ratio of rice and water, after a user starts a switch, the heating plate carries out heating operation, the pot body 1 conducts the absorbed heat to the rice-water mixture in the pot, and the process can be understood as the heat exchange process. At normal atmospheric pressure, water has a fixed boiling point and a higher specific heat value, and where a mixture of rice and water exists, the temperature of the vertical surface of the pot body in the area is the same due to the existence of water, namely, the area has an isothermal area. In the place where no water exists, the temperature of the pot body 1 loses the isothermal zone and exists in a gradient way.
The specific heat of water is high, the amount of water in the pot body 1 determines the temperature rise speed of the pot body on the time axis, the size of the pot of each electric cooker is fixed, the pot is determined well when a manufacturer produces the electric cooker, and the only variable is the amount of water. When the rice is cooked, the water accounts for a small amount, namely the temperature rising rate of the cooker is high, and the subjective intention of the user, namely the cooking process of the user can be judged through the temperature rising rate.
The complete workflow is as follows: after the user starts the electric cooker, the control panel 3 sends a full-power working instruction to the heating plate, and the heating plate works and conducts heat to the cooker. Meanwhile, the control panel 3 also sends a working instruction to the infrared temperature measuring sensor 2 and the driving motor 5 to drive the infrared temperature measuring sensor 2 to scan the outside temperature of the cookware. In the process of temperature rise, the height of the water level is determined by a method of searching a temperature boundary surface, when the temperature of the surface of the pot is stable on the boundary surface, the boiling of water can be judged, at the moment, a temperature scanning system only needs to scan on the temperature boundary layer, the falling rate of the water level is judged by a central processing unit according to the synchronous combination data of a sensor and a scanning driving system. And the central processing unit is combined with the set mathematical model to control the heating process. When the temperature boundary layer is constant, the water content higher than that of the rice can be judged to be completely disappeared, and at the moment, the temperature scanning system carries out temperature fixed-point measurement at the lower part of the pot. When the rice is heated continuously, the absorbed water can be lost through an evaporation method, after the free water is evaporated, the temperature on the surface of the cooker begins to rise, and at the moment, a control panel outputs a heating stopping instruction to finish the cooking process.
In the soup cooking state, under the condition that the pot cover is covered, a temperature interval which is obviously higher than the temperature interval below a boundary layer is generated above a temperature boundary layer of a mixture of water and rice due to the existence of water vapor, the temperature higher than an isothermal area exists above the boundary layer due to the fact that the enthalpy of the water vapor is higher than that of water, and the state of the pot cover can be identified after the sensor collects the existence of the temperature. Under the condition that the pot cover is covered, if the heating power is too high, the situation of soup overflow is very easy to happen in the soup cooking process, and in order to prevent the soup overflow phenomenon, a user often uses the mode of opening the pot cover to cook soup. Through the technical scheme of the invention, the control panel can directly select proper heating power to meet the soup cooking requirement of a user without artificial excessive intervention.
The cooking method has the advantages that the manufacturer of the cookware does not need to set too many cooking model selection keys, only needs one key to start, automatically identifies the cooking intention of the user, and automatically finishes the corresponding cooking process. Thereby reducing the operation difficulty and improving the use comfort of the user.
Claims (10)
1. Scanning formula infrared ray temperature measurement structure, including the pot body (1), its characterized in that, the vertical lift drive assembly of installing in one side of the pot body (1), lift drive assembly on install infrared temperature sensor (2) that have central processing unit, infrared temperature sensor (2) go on the oscilaltion and scan the outer wall of the pot body (1), pot body (1) externally mounted have electric heater unit, still include control panel (3) that link to each other with electric heater unit, lift drive assembly and infrared temperature sensor (2).
2. The scanning infrared thermometry structure of claim 1, wherein: the lifting transmission assembly comprises a vertically arranged transmission screw rod (4) and a driving motor (5) arranged at the end part of the transmission screw rod (4), the transmission screw rod (4) is sleeved with an infrared temperature sensor (2) with a central processing unit, and the infrared temperature sensor (2) is enabled to move up and down through the rotation of the transmission screw rod (4).
3. The scanning infrared thermometry structure of claim 1 or 3, wherein: the outer side wall of the pot body (1) is subjected to oxidation blackening treatment.
4. The scanning infrared thermometry structure of claim 1, wherein: the infrared temperature sensor (7) is an analog single-point infrared temperature measuring sensor, the model is STC9CF5, and the number of the infrared temperature sensors is one.
5. The scanning infrared thermometry structure of claim 1, wherein: the electric heating device is controlled by adopting a pulse width modulation mode.
6. The scanning infrared thermometry structure of claim 2, wherein: the driving motor (5) is a stepping motor, and the stepping angle is 1.8 degrees.
7. The scanning infrared thermometry structure of claim 1, wherein: the electric heating cooking appliance is a household electric cooker.
8. A method for applying the scanning infrared thermometric structure of claim 1 to an electrically heated cooking appliance, comprising the steps of:
s1: after receiving the starting instruction, the control board (3) sends an instruction to the electric heating device, the electric heating device works at full power, and meanwhile, the driving motor (5) moves the infrared temperature sensor (2) to the bottom to collect the temperature of the low position of the pot body;
s2: the central processing unit processes the temperature collected by the infrared temperature sensor (2), if the temperature is found to accord with an empty pan model, a command of stopping working is sent to the control panel, and if the mathematical model of the temperature is found to accord with normal cooking, a normal working command is sent to the control panel;
s3: after receiving a normal working instruction of the central processing unit, the control panel (3) sends a working instruction to the driving motor (5), the infrared temperature sensor (2) is driven by the driving motor (5) and the transmission screw (4) to scan the temperature of the outer wall of the pot body (1) up and down, and the infrared temperature sensor (2) is responsible for sending collected temperature data to the central processing unit;
s4, the central processing unit carries out data analysis on the collected temperature data, and compares the data with the established mathematical cooking model to judge the cooking mode of the user;
s5, the central processing unit sends an instruction to the cooking model to the control panel (3), and the control panel (3) controls the working mode of the electric heating device;
and S6, when the central processing unit judges that the cooking process is finished through the collected data, the central processing unit sends an instruction for finishing the cooking process to the control panel (3), and simultaneously the driving motor is reset.
9. The method of claim 8, wherein: the cooking mathematical model comprises a soup cooking mathematical model, a rice steaming mathematical model, a soup overflowing mathematical model and an empty pot mathematical model.
10. The method of claim 8, wherein: the temperature data collected in step S1 includes the infrared field temperature and the sensor body temperature.
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| CN201910603913.5A CN110754958A (en) | 2019-07-05 | 2019-07-05 | Scanning type infrared temperature measurement structure and application method thereof on electric heating cooking utensil |
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| KR20110076019A (en) * | 2009-12-29 | 2011-07-06 | 주식회사 리홈 | Method for continuous cooking in electric rice-cooker |
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