CN110848755A - Control method of gas stove and gas stove - Google Patents
Control method of gas stove and gas stove Download PDFInfo
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- CN110848755A CN110848755A CN201810955776.7A CN201810955776A CN110848755A CN 110848755 A CN110848755 A CN 110848755A CN 201810955776 A CN201810955776 A CN 201810955776A CN 110848755 A CN110848755 A CN 110848755A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010411 cooking Methods 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
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- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
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Abstract
The invention discloses a gas stove and a control method thereof. The control method of the gas stove comprises the following steps: acquiring a pan image through a camera; determining the category of the cookware and the color of the cookware according to the acquired cookware image; acquiring an emissivity value and an internal and external temperature difference value of the cookware according to the type of the cookware and the color of the cookware; determining the temperature of the outer surface of the cookware according to the emissivity value; and determining the temperature of the inner surface of the pot according to the temperature of the outer surface of the pot and the difference value of the inner temperature and the outer temperature of the pot. According to the control method of the gas stove, the pot can be subjected to accurate temperature measurement, and the pot can be subjected to accurate temperature control.
Description
Technical Field
The invention relates to the technical field of gas stoves, in particular to a gas stove and a control method thereof.
Background
The temperature measuring device used in the anti-dry heating application of the existing gas stove is a contact type temperature sensor such as a thermocouple or a thermistor, the temperature measuring device is directly contacted with a pot bottom or is contacted with the pot bottom through a metal shell for measuring temperature, and the temperature measuring device must be contacted with the pot bottom. Heat is transferred to the temperature measuring device from the bottom of the pot through heat conduction, and large errors can be generated due to poor contact. In order to avoid the large error caused by the direct heating of the temperature measuring device by high-temperature flame, the combustor needs to be specially designed, and the design is limited.
The existing infrared temperature measurement scheme for the gas stove is serious in pot selection, and the temperature measurement accuracy of the existing infrared temperature measurement scheme is greatly influenced by the emissivity of the bottom of the pot. The existing infrared temperature measurement scheme for the gas stove uses a common full-spectrum infrared detector (commonly used is 5.5-14 um), and when the detection emissivity difference of a pot is large, a large detection error can be brought. For example, the infrared emissivities of a black iron pan and a stainless steel bright bottom pan with the same temperature are greatly different, the same full-spectrum infrared detector is used for detecting, the signal intensity is greatly different, and the error of the obtained temperature value can reach dozens of degrees. A few schemes use a high-temperature-resistant metal sheet to contact the pot bottom, the infrared temperature measurement is actually detected by the infrared radiation intensity of the high-temperature-resistant metal sheet and is not influenced by the emissivity of the pot bottom, but the temperature measurement device is in a contact type, does not exert the non-contact advantage of the infrared temperature measurement, loses the significance of the infrared temperature measurement, and cannot avoid the influence of poor contact and the interference of a flame heating metal isolating ring.
The existing infrared thermometers can only detect targets with similar infrared emissivity generally, and when the infrared emissivity difference of the targets is too large, the thermometers must be replaced or an operator adjusts a correction coefficient according to the known emissivity of the targets. The emissivity of different pot bottom materials is different, for example, the infrared emissivity of black cast iron and bright stainless steel materials has a great difference, and a common infrared temperature measuring device (with one wave band) cannot accurately measure the temperature of common pots at the same time.
Different pots have different temperature differences between the inner surface and the outer surface, such as thin stainless steel pots, the temperature difference between the inner surface and the outer surface is very small, and the temperature difference between the inner surface and the outer surface of double-bottom pots and marmite is very large, so that the temperature of the outer surface of the pot can only be accurately measured, and the accuracy of the inner surface cannot be guaranteed even after emissivity is corrected.
Because the accurate temperature measurement can not be realized, the temperature measuring device intelligence that current gas-cooker that has infrared temperature measurement function used realizes preventing dry combustion method function, detects the pan temperature too high promptly, when reaching dry combustion method temperature, sends out the police dispatch newspaper sound or closes the valve, and unable accurate temperature measurement consequently also can not realize accurate accuse temperature.
Disclosure of Invention
The invention aims to provide a control method of a gas stove and the gas stove, which can accurately measure the temperature of a pot so as to realize accurate temperature control of the pot.
According to an aspect of the present invention, there is provided a control method of a gas range, including:
acquiring a pan image through a camera;
determining the category of the cookware and the color of the cookware according to the acquired cookware image;
acquiring an emissivity value and an internal and external temperature difference value of the cookware according to the type of the cookware and the color of the cookware;
determining the temperature of the outer surface of the cookware according to the emissivity value;
and determining the temperature of the inner surface of the pot according to the temperature of the outer surface of the pot and the difference value of the inner temperature and the outer temperature of the pot.
Preferably, the control method further includes:
obtaining a target temperature of the inner surface of the pot;
the firepower is adjusted according to the difference value of the current temperature and the target temperature of the inner surface of the cooker.
Preferably, the adjusting the fire power according to the difference between the current temperature of the inner surface of the pot and the target temperature includes:
determining the valve adjusting amplitude according to the difference value of the current temperature and the target temperature of the inner surface of the cooker;
and sending a control instruction, and adjusting the valve for controlling the fire power according to the determined valve adjustment amplitude.
Preferably, the step of obtaining a target temperature of the inner surface of the pot comprises:
acquiring a current cooking mode and a current cooking stage;
and determining the target temperature of the inner surface of the cooker according to the preset temperature change curve, the current cooking mode and the current cooking stage.
Preferably, the step of obtaining the pan image through the camera further comprises the following steps:
identifying a cooking range with a pot through a camera;
detecting whether the cooking range is started;
when detecting that the kitchen range has started, get into the step of acquireing the pan image.
Preferably, the control method further includes:
acquiring the temperature of the inner surface of the pot;
the temperature of the inner surface of the cookware is sent to the display module to be displayed.
Preferably, the control method further includes:
detecting whether the temperature of the inner surface of the cookware reaches a preset temperature threshold value or not;
when the temperature of the inner surface of the cooker reaches or exceeds a preset temperature threshold value, an alarm signal is sent out, and meanwhile, firepower is gradually reduced or the valve is directly closed.
Preferably, the step of determining the category of the cookware and the color of the cookware according to the acquired cookware image includes:
uploading the acquired pan images to the internet;
receive the classification of the pan and the colour information of pan that the internet acquireed according to pan image matching.
According to another aspect of the invention, a gas stove is provided, which comprises a stove and a pot, wherein a camera and an image recognition module are arranged on the stove, the camera is used for acquiring a pot image, and the image recognition module is electrically connected to the camera and is used for recognizing the category of the pot and the color of the pot according to the pot image acquired by the camera.
Preferably, the gas stove further comprises a storage module and a processing module, the storage module stores the type of the cookware, the color of the cookware, the emissivity value corresponding to the color of the cookware, and the internal and external temperature difference value corresponding to the type of the cookware, and the storage module and the image recognition module are electrically connected to the processing module.
The control method of the gas stove comprises the following steps: acquiring a pan image through a camera; determining the category of the cookware and the color of the cookware according to the acquired cookware image; acquiring an emissivity value and an internal and external temperature difference value of the cookware according to the type of the cookware and the color of the cookware; determining the temperature of the outer surface of the cookware according to the emissivity value; and determining the temperature of the inner surface of the pot according to the temperature of the outer surface of the pot and the difference value of the inner temperature and the outer temperature of the pot. According to the control method of the gas stove, information such as the type and the material of the cookware can be identified through images, then the emission rate value of the cookware can be accurately determined according to the type of the cookware and the color of the cookware, further, the temperature in the cookware can be accurately determined by combining an infrared temperature measuring device through the accurate emission rate value and the difference value of the inner temperature and the outer temperature of the cookware, the accurate measurement of the temperature of the inner surface of the cookware is realized, the problem that the temperature of the cookware is picked up by the infrared temperature measuring device is solved, the accurate temperature control of the cookware can be realized according to the accurately measured temperature, and the problem that the infrared temperature measuring device of.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a control method of a gas range according to an embodiment of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
The mathematical description of infrared temperature measurement is
E＝αkT4
E is the energy received by the infrared detector
T is target temperature (pot bottom temperature)
α is the emissivity of the target (bottom of a pot) and k is the correlation coefficient, which is a constant value (Stefan-Boltzmann constant).
Thus measuring the temperature of the pan bottom as
The value of E is obtained by a temperature measuring detector, the corresponding relation exists between the value of E and the output signal value of the detector, and the corresponding relation is different for different detectors such as a thermopile, a photoelectric detector and the like. For most detectors, the output signal voltage V oc E,
the α of the black bottom pot can be generally 0.9, the stainless steel bright bottom pot is near 0.4. the common infrared temperature measurement method considers that α is a fixed value, and the same α calculation is used when different pots are used, so that temperature measurement errors are inevitably introduced.
Different pots have different inner and outer surface temperature differences, for example, thin stainless steel pots have very small inner and outer surface temperature differences, and double-bottom pots and marmite have very large inner and outer surface temperature differences, so that even after emissivity is corrected, the temperature of the outer surface of the pot can only be accurately measured, and the accuracy of the inner surface cannot be guaranteed. In order to solve the above problems, the present invention is particularly proposed.
Referring to fig. 1 in combination, according to an embodiment of the present invention, a control method of a gas range includes: acquiring a pan image through a camera; determining the category of the cookware and the color of the cookware according to the acquired cookware image; acquiring an emissivity value and an internal and external temperature difference value of the cookware according to the type of the cookware and the color of the cookware; determining the temperature of the outer surface of the cookware according to the emissivity value; and determining the temperature of the inner surface of the pot according to the temperature of the outer surface of the pot and the difference value of the inner temperature and the outer temperature of the pot.
According to the control method of the gas stove, information such as the type and the material of the cookware can be identified through images, then the emission rate value of the cookware can be accurately determined according to the type of the cookware and the color of the cookware, further, the temperature in the cookware can be accurately determined by combining an infrared temperature measuring device through the accurate emission rate value and the difference value of the inner temperature and the outer temperature of the cookware, the accurate measurement of the temperature of the inner surface of the cookware is realized, the problem that the temperature of the cookware is picked up by the infrared temperature measuring device is solved, the accurate temperature control of the cookware can be realized according to the accurately measured temperature, and the problem that the infrared temperature measuring device of.
The temperature measurement infrared detector receives infrared radiation energy emitted by the pan bottom and converts the infrared radiation energy into an electric signal V1; obtaining the infrared radiation energy E1 emitted by the pan bottom according to the electric signal V1;
α kT according to the formula E14The pan bottom temperature T can be calculated, wherein k is Stefan-Boltzmann constant, and the emissivity α is related to the material of the pan bottom, especially the color, so the accurate emissivity α can be determined by obtaining the material of the pan bottom and the color of the pan, thereby ensuring the accuracy of the measurement of the pan bottom temperature.
In this embodiment, can shoot the image of pan through the camera, and then carry out the analysis to the pan image of shooing and match, can acquire accurate pan information, for example pan kind, pan material and pan colour etc. according to the pan information of acquireing, can accurately judge the infrared emissivity of pan.
Still include before the step of acquireing the pan image through the camera: identifying a cooking range with a pot through a camera; detecting whether the cooking range is started; and when the cooker is detected to be started, entering a step of acquiring a cooker image. Because the pan only under the state that the cooking utensils started, just need go the temperature that detects the pan, just need acquire the information of pan this moment, and then measure the pan temperature through infrared temperature measuring device, consequently, at first discernment has the kitchen range of pan through the camera, then whether the pan on the detection kitchen range has started, can make the control by temperature change operation target of pan more accurate, get rid of interference factor, avoid doing some extra idle work, improve the validity and the work efficiency of the control method of gas-cooker.
The control method further comprises the following steps: obtaining a target temperature of the inner surface of the pot; the firepower is adjusted according to the difference value of the current temperature and the target temperature of the inner surface of the cooker. Because the accurate temperature of the inner surface of the cooker can be obtained by the control method, the target temperature of the inner surface of the cooker can be determined according to the current cooking state and the like; and then, adjusting the firepower according to the difference value between the current temperature and the target temperature, realizing the accurate control of the temperature in the pot and improving the cooking effect.
The step of adjusting the fire power according to the difference value between the current temperature and the target temperature of the inner surface of the cookware comprises the following steps: determining the valve adjusting amplitude according to the difference value of the current temperature and the target temperature of the inner surface of the cooker; and sending a control instruction, and adjusting the valve for controlling the fire power according to the determined valve adjustment amplitude. The method for controlling the fire power is that a CPU of the stove sends an instruction to a fire power adjusting mechanism, such as a proportional valve and a gas valve, and the fire power is controlled by controlling the opening of a valve.
The step of obtaining the target temperature of the inner surface of the cookware comprises the following steps: acquiring a current cooking mode and a current cooking stage; and determining the target temperature of the inner surface of the cooker according to the preset temperature change curve, the current cooking mode and the current cooking stage. Through the mode, firepower can be controlled in real time according to different recipes, the cookware can reach required temperature values, and the cookware temperature changes according to the preset temperature change curve at different stages in the cooking process, so that a better cooking effect is obtained.
The control method further comprises the following steps: acquiring the temperature of the inner surface of the pot; the temperature of the inner surface of the cookware is sent to the display module to be displayed. Through setting up display module to show pan internal surface temperature, make the user can acquire the temperature in the pot in real time, thereby select suitable culinary art temperature and culinary art mode, can reach better culinary art effect.
The control method further comprises the following steps: detecting whether the temperature of the inner surface of the cookware reaches a preset temperature threshold value or not; when the temperature of the inner surface of the cooker reaches or exceeds a preset temperature threshold value, an alarm signal is sent out, and meanwhile, firepower is gradually reduced or the valve is directly closed. When the temperature of the inner surface of the cooker exceeds the threshold value, the cooker can give out an alarm, give an alarm to a user through a mobile phone and other terminals, gradually reduce firepower, or directly close the valve, so that the safe operation of the cooker is ensured.
The step of confirming the classification of pan and the colour of pan according to the pan image of acquireing includes: uploading the acquired pan images to the internet; receive the classification of the pan and the colour information of pan that the internet acquireed according to pan image matching. When having carried out pan discernment, can be directly reach the internet with the pan image that the camera acquireed on, then match with the pan on the internet to avoid the not enough problem that leads to unable correct recognition pan of pan information of the pan information of cooking utensils storage itself, further improve pan information identification's accuracy and reliability. The pan image can be uploaded to the internet through WIFI, and can also be connected to the internet through a data line, so that the pan image can be uploaded to the internet.
According to the embodiment of the invention, the gas stove comprises a stove and a cooker, wherein the stove is provided with a camera and an image recognition module, the camera is used for acquiring a cooker image, and the image recognition module is electrically connected to the camera and used for recognizing the category of the cooker and the color of the cooker according to the cooker image acquired by the camera.
Preferably, the gas stove further comprises a storage module and a processing module, the storage module stores the type of the cookware, the color of the cookware, the emissivity value corresponding to the color of the cookware, and the internal and external temperature difference value corresponding to the type of the cookware, and the storage module and the image recognition module are electrically connected to the processing module. This storage module can be connected with the internet to the pan information on the internet is downloaded in real time, makes the pan information among the storage module more complete, can realize the matching and the discernment of various pan information better.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A control method of a gas range, comprising:
acquiring a pan image through a camera;
determining the category of the cookware and the color of the cookware according to the acquired cookware image;
acquiring an emissivity value and an internal and external temperature difference value of the cookware according to the type of the cookware and the color of the cookware;
determining the temperature of the outer surface of the cookware according to the emissivity value;
and determining the temperature of the inner surface of the pot according to the temperature of the outer surface of the pot and the difference value of the inner temperature and the outer temperature of the pot.
2. The control method according to claim 1, characterized by further comprising: obtaining a target temperature of the inner surface of the pot;
the firepower is adjusted according to the difference value of the current temperature and the target temperature of the inner surface of the cooker.
3. The control method according to claim 2, wherein the step of adjusting the fire power according to the difference between the current temperature of the inner surface of the pot and the target temperature comprises:
determining the valve adjusting amplitude according to the difference value of the current temperature and the target temperature of the inner surface of the cooker;
and sending a control instruction, and adjusting the valve for controlling the fire power according to the determined valve adjustment amplitude.
4. The control method according to claim 2, wherein the step of obtaining the target temperature of the inner surface of the pot comprises:
acquiring a current cooking mode and a current cooking stage;
and determining the target temperature of the inner surface of the cooker according to the preset temperature change curve, the current cooking mode and the current cooking stage.
5. The control method according to claim 1, further comprising, before the step of obtaining the pan image through the camera:
identifying a cooking range with a pot through a camera;
detecting whether the cooking range is started;
when detecting that the kitchen range has started, get into the step of acquireing the pan image.
6. The control method according to claim 1, characterized by further comprising: acquiring the temperature of the inner surface of the pot;
the temperature of the inner surface of the cookware is sent to the display module to be displayed.
7. The control method according to claim 1, characterized by further comprising: detecting whether the temperature of the inner surface of the cookware reaches a preset temperature threshold value or not;
when the temperature of the inner surface of the cooker reaches or exceeds a preset temperature threshold value, an alarm signal is sent out, and meanwhile, firepower is gradually reduced or the valve is directly closed.
8. The control method according to claim 1, wherein the step of determining the category of cookware and the color of cookware according to the obtained cookware image comprises:
uploading the acquired pan images to the internet;
receive the classification of the pan and the colour information of pan that the internet acquireed according to pan image matching.
9. The utility model provides a gas stove, includes cooking utensils and pan, its characterized in that, be provided with camera and image recognition module on the cooking utensils, the camera is used for acquireing the pan image, image recognition module electric connection to the camera, and according to the classification of the pan image recognition pan that the camera acquireed and the colour of pan.
10. The gas stove of claim 9, further comprising a storage module and a processing module, wherein the storage module stores therein a type of cookware, a color of the cookware, an emissivity value corresponding thereto, and an inside and outside temperature difference value corresponding to the type of cookware, and the storage module and the image recognition module are electrically connected to the processing module.
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| CN201810955776.7A CN110848755A (en) | 2018-08-21 | 2018-08-21 | Control method of gas stove and gas stove |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113741259A (en) * | 2021-08-25 | 2021-12-03 | 海信家电集团股份有限公司 | Kitchen range and control method thereof |
| CN114060866A (en) * | 2021-11-19 | 2022-02-18 | 上海晓同机电科技有限公司 | Gas stove temperature measuring device and method |
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| KR20180083167A (en) * | 2017-01-12 | 2018-07-20 | 엘지전자 주식회사 | Cooking apparatus and cooking system including same |
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- 2018-08-21 CN CN201810955776.7A patent/CN110848755A/en active Pending
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| CN106556036A (en) * | 2016-11-21 | 2017-04-05 | 陈时军 | A kind of intelligent gas-burning stove system and its control method |
| KR20180083167A (en) * | 2017-01-12 | 2018-07-20 | 엘지전자 주식회사 | Cooking apparatus and cooking system including same |
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| CN113741259A (en) * | 2021-08-25 | 2021-12-03 | 海信家电集团股份有限公司 | Kitchen range and control method thereof |
| CN114060866A (en) * | 2021-11-19 | 2022-02-18 | 上海晓同机电科技有限公司 | Gas stove temperature measuring device and method |
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Application publication date: 20200228 |