CN110043926B - Dry burning prevention device and method, smoke machine and smoke stove complete equipment - Google Patents
Dry burning prevention device and method, smoke machine and smoke stove complete equipment Download PDFInfo
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- CN110043926B CN110043926B CN201910302017.5A CN201910302017A CN110043926B CN 110043926 B CN110043926 B CN 110043926B CN 201910302017 A CN201910302017 A CN 201910302017A CN 110043926 B CN110043926 B CN 110043926B
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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
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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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
Abstract
The utility model provides a prevent dry combustion method device, its sets up in cigarette machine department, and the cigarette machine is placed with cooking utensils at least part relative, prevents dry combustion method device and includes: the non-contact temperature measurement module is used for detecting the temperature state of the surface of the object to be measured; and the non-contact temperature measuring module is also used for controlling the range hood and the kitchen range according to the temperature state. The anti-dry burning function is integrated on the smoke machine, the temperature state of the surface of the object to be detected is determined through the non-contact temperature measuring module, so that the smoke machine and the cooker are controlled, whether dry burning exists in the cooker can be judged quickly and accurately, and personal and property safety of a user is guaranteed.
Description
Technical Field
The invention relates to the field of dry burning prevention, in particular to a dry burning prevention device and method, a range hood and a smoke stove complete set.
Background
The dry burning prevention function of the existing stove is generally arranged in a stove head or at the lower part of a pot bottom, and a temperature sensor is generally contacted with the bottom surface of the pot for measuring temperature.
As a standard for each household, its importance is self evident, and the industry field also sets out a number of standards regarding the use of gas cooktops. In spite of the standards, most attention points are focused on the aspects of safety, energy conservation, environmental protection and the like, the safety as the inner core of the gas stove always stays on unexpected events such as unexpected flameout protection devices and the like, a standard aiming at the common hidden danger of kitchens caused by forgetting to turn off the fire is lacked, and the influence of flame, oil stain and long-term accumulation of oil and water is ignored, so that the measured temperature is inaccurate or lagged.
The dry burning prevention technical principle of the gas stove is as follows: the gas stove dry-burning-prevention gas-cutting device consists of a temperature sensor, a heat-insulation protective cover, a connecting rod and a stop needle valve, wherein the temperature sensor is arranged in the middle of a burner and is contacted with the pot bottom on the burner, the stop needle valve is arranged on a gas supply port of an electronic ignition assembly, the connecting rod is driven by the temperature sensor to act after water in the heat receiver is boiled to be dry so as to enable the stop needle valve to act, and gas supply of the burner is cut off to achieve the effect of stopping heating. Or an NTC heat source tracking technology is adopted, so that intelligent flameout and gas turn-off can be realized when the gas stove does not sit on a pot for 3 minutes under strong fire. When the temperature of the oil in the pot exceeds 230 ℃ and the temperature of the bottom of the pot is 298 ℃, the intelligent flameout and gas shutoff can be realized, the healthy cooking is realized, and carcinogenic substances generated due to overhigh oil temperature are avoided. The gas stove can prevent dry combustion and automatically detect various states. For example, when a user forgets to sit on a pot after opening a fire, the gas stove automatically senses the fire and automatically extinguishes within 5 minutes. When the flame of the gas stove is accidentally extinguished by water or extinguished by strong wind, the gas stove can automatically cut off the gas source, so that gas leakage is avoided, and a safer kitchen living environment is brought. Most of the existing sensors are contact type dry burning prevention sensors.
Simultaneously along with the intelligent popularization of kitchen appliance, do not form a good intelligent culinary art mode yet to the culinary art of food, the firepower size is generally controlled through the cigarette kitchen linkage to the mode that has now, but can't realize the intelligence of culinary art in-process, can't solve technical defect such as consumer control duration and degree of heating.
Disclosure of Invention
In view of the above, the invention aims to provide an anti-dry-burning device and method, a range hood and a complete set of equipment of a range hood, wherein an anti-dry-burning function is integrated on the range hood, and the temperature state of the surface of an object to be measured is determined through a non-contact temperature measurement module, so that the range hood and a cooker are controlled, whether dry-burning exists in the cooker can be judged quickly and accurately, and personal and property safety of a user is ensured.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an anti-dry burning device is arranged at a range hood, the range hood is at least partially arranged opposite to a cooker, and the anti-dry burning device comprises:
the non-contact temperature measurement module is used for detecting the temperature state of the surface of the object to be measured; and the non-contact temperature measurement module is also used for controlling the range hood and the kitchen range according to the temperature state, wherein the temperature state comprises the current temperature of an object to be measured, the temperature duration and the temperature change rate, and the temperature change rate is the slope value of the temperature change between the current temperature and the previous moment.
Further, non-contact temperature measurement module is infrared thermopile temperature measurement module, and this infrared thermopile temperature measurement module includes:
the optical filter is used for filtering stray light emitted by the object to be detected and determining infrared light emitted by the object to be detected, wherein the stray light does not include infrared light;
the infrared thermopile sensor is used for receiving the infrared light and determining output voltage;
the main board is used for determining the current temperature of the object to be measured according to the output voltage; and generating a control signal according to the current temperature, the temperature duration and the temperature change rate, thereby controlling the range hood and the cooker.
Further, the main board generates a control signal according to the current temperature, the temperature duration and the temperature change rate, so as to control the range hood and the kitchen range, specifically: the main board respectively judges the current temperature T, the first preset temperature A and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generates corresponding control signals, so that the range hood and the cooker are controlled:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, generating a first control signal to control the stove to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T is more than or equal to T, and C is less than or equal to X, generating a second control signal to control the indicator light of the cigarette machine to flicker;
if T is more than or equal to A, B and T is more than or equal to X, generating a third control signal, controlling the indicator light to flash and the buzzer of the cigarette machine to sound once;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, generating a fourth control signal to control the buzzer to sound for a long time;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove to close.
Further, the range of A is 220-300 ℃; the range of D is 20-50 ℃; the range of t is 10-30 s.
Further, the main board is further configured to determine, according to the characteristic of the object to be measured, a range of X:
if the object to be detected is only a pot placed on the stove, determining that the range of X is 2-3 ℃/s;
if the object to be heated is the pot and the object to be heated placed in the pot, and the object to be heated is water, determining that the range of X is 0.5-1 ℃/s;
and if the object to be measured is the pot and the object to be heated, and the object to be heated comprises oil, determining that the range of the X is 0.8-1.5 ℃/s.
Furthermore, the area of the temperature detection area of the non-contact temperature measurement module is not larger than the area of the bottom surface of the cookware.
Furthermore, the infrared thermopile sensors correspond to the cookware one by one, and the central line of the infrared thermopile sensors and the central line of the cookware are on the same straight line.
A dry burning prevention method comprises the following steps:
a non-contact temperature measuring module is arranged at the smoke machine, and the smoke machine and the kitchen range are at least partially oppositely arranged;
detecting the temperature state of the surface of the object to be detected through the non-contact temperature measuring module, wherein the temperature state comprises the current temperature of the object to be detected, the temperature duration and the temperature change rate, and the temperature change rate is the slope value of the temperature change between the current temperature and the temperature change at the previous moment;
and controlling the range hood and the kitchen range according to the temperature state.
Further, according to the temperature state control the cigarette machine and the cooking utensils, specifically: respectively judging the current temperature T, the first preset temperature A and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generating corresponding control signals so as to control the range hood and the cooker:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, generating a first control signal to control the stove to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T is more than or equal to T, and C is less than or equal to X, generating a second control signal to control the indicator light of the cigarette machine to flicker;
if T is more than or equal to A, B and T is more than or equal to X, generating a third control signal, controlling the indicator light to flash and controlling a buzzer of the cigarette machine to sound once;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, generating a fourth control signal to control the buzzer to sound for a long time;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove to close.
Further, the method also comprises the following steps: judging the range of X according to the characteristics of the object to be detected:
if the object to be detected is only a pot placed on the stove, determining that the range of X is 2-3 ℃/s;
if the object to be heated is the pot and the object to be heated placed in the pot, and the object to be heated is water, determining that the range of X is 0.5-1 ℃/s;
and if the object to be measured is the pot and the object to be heated, and the object to be heated comprises oil, determining that the range of the X is 0.8-1.5 ℃/s.
A cigarette machine comprises the anti-dry burning device.
A smoke stove complete equipment comprises the smoke machine and a stove at least partially arranged opposite to the smoke machine.
Compared with the prior art, the dry burning prevention device and method, the smoke machine and the smoke stove complete equipment have at least the following advantages:
(1) different from the integration of an anti-dry burning function on a stove in the prior art, the anti-dry burning function is integrated on a cigarette machine, the influences of high-temperature flame, oil stain, carbon deposition at the bottom of a pot, contact time and the like are avoided, the temperature state of the surface of an object to be detected is determined through a non-contact temperature measuring module, and compared with the temperature measurement of a traditional metal heat-sensitive sensor, the temperature state (comprising three parameters) of the surface of the object to be detected can be rapidly and accurately detected, so that the accuracy of the dry burning condition is ensured, and corresponding control actions are taken, so that the personal and property safety of a user is ensured;
(2) according to the temperature state of the surface of an object to be measured, namely the temperature state of the bottom surface of a pot placed on the cooker and/or the temperature state of the upper surface of an object to be heated covered in the pot, the segmented alarm and control are carried out, the intervention is carried out in advance, the occurrence of the dangerous dry burning situation is greatly reduced, and the range hood and the cooker are more intelligent and safer;
(3) according to the method, different preset rates are selected according to whether the stove is used for containing the objects to be heated and the types of the objects to be heated, so that the dry burning prevention misjudgment probability caused by different types of the objects to be heated is reduced.
Drawings
FIG. 1 is a schematic structural view of a smoke cooker kit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an infrared thermopile temperature measurement module according to an embodiment of the present invention;
fig. 3 is a schematic step diagram of an anti-dry heating method according to an embodiment of the present invention.
< description of symbols >
1-a smoke machine; 2-infrared thermopile temperature measurement module; 3-an object to be measured; 4-cooking utensils; 5, a main board; 6-infrared wave; 7-ambient air; 8-an optical filter; 9-infrared sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the prior art, the temperature of an object to be measured is generally measured by arranging a metal heat-sensitive sensor on a cooker, the temperature measurement result is easily influenced by high-temperature flame, oil stain, carbon deposition at the bottom of a pot, contact time and the like, in addition, the firepower is controlled by linkage of a smoke stove, the intelligent cooking process cannot be realized, and the technical defects that a consumer controls the duration and degree of heating cannot be overcome. In view of the above, the invention provides an anti-dry-burning device and method, a range hood and a range hood complete set, wherein an anti-dry-burning function is integrated on the range hood, so that the influences of high-temperature flame, oil stain, pot bottom carbon deposition, contact time and the like are avoided, the temperature state of the surface of an object to be detected is determined through a non-contact temperature measuring module, and compared with the temperature measurement of a traditional metal heat-sensitive sensor, the temperature state of the surface of the object to be detected can be rapidly and accurately detected, so that the accuracy of dry-burning judgment is ensured, and corresponding control actions are taken, so that the personal and property safety of a user is ensured.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the invention provides an anti-dry burning device which is arranged at a range hood 1 (can be positioned at any position of the range hood 1, preferably at the bottom of the inner side of the range hood 1 so as to be opposite to a kitchen range and realize more accurate anti-dry burning monitoring), wherein the range hood 1 and the kitchen range 4 are at least partially arranged oppositely (please refer to the complete equipment of a smoke range in figure 1), and the installation position of the anti-dry burning device is not limited to the bottom of the inner side of the range hood 1 and can also be used as an accessory of the range hood 1 and independently installed on the range hood 1.
The dry burning prevention device comprises: the non-contact temperature measurement module is used for detecting the temperature state of the surface of the object 3 to be measured; and the non-contact temperature measuring module is also used for controlling the range hood 1 and the cooking utensil 4 according to the temperature state.
The surface of the object to be measured 3 comprises a bottom surface of a pot placed on the cooker and/or an upper surface of an object to be heated covered in the pot, namely when the object to be heated is not placed in the pot, the surface of the object to be measured refers to the bottom surface of the pot on the cooker; when an object to be heated is placed in the pot, the surface of the object to be heated at least partially covers the upper surface of the object to be heated in the pot and the bottom surface of the pot, which is not covered by the object to be heated, of the pot. The temperature state comprises the current temperature, the temperature duration and the temperature change rate, and the temperature change rate is the value of the slope of the temperature change between the current temperature and the previous moment; .
In the embodiment of the invention, a user can set a sampling period (for example, 0.5-1 s) according to actual needs, so that the non-contact temperature measurement module collects the temperature state of the surface of the object to be measured 3 every other sampling period. It should be noted that the current temperature is an average value of the temperatures detected in the sampling period, and the temperature at the previous time is an average value of the temperatures detected in the previous sampling period.
Preferably, the area of the temperature detection area of the non-contact temperature measurement module is not larger than the area of the bottom surface of the cookware, that is, when no object to be heated exists in the cookware, the temperature detection area can only be the range of the bottom surface of the cookware; when the objects to be heated are arranged in the pot, the temperature detection area is at least partially covered on the upper surface of the objects to be heated in the pot and the bottom surface of the pot, which is not covered by the objects to be heated, of the stove 4. Therefore, the range outside the stove 4 detected by the non-contact temperature measuring module can be avoided, and the accuracy of temperature detection is improved.
Wherein, the non-contact temperature measurement module is an infrared thermopile temperature measurement module 2 (may also be other sensors), the form of the infrared thermopile temperature measurement module 2 may be single-point or multi-point, fig. 2 is a schematic structural diagram of the infrared thermopile temperature measurement module according to the embodiment of the present invention, and as shown in fig. 2, the infrared thermopile temperature measurement module 2 includes:
the optical filter 8 is used for filtering stray light emitted by the object to be detected 3 and determining infrared light emitted by the object to be detected 3, wherein the stray light does not include infrared light;
the infrared thermopile sensor 9 is used for receiving the infrared light and determining output voltage; referring to fig. 1, the infrared thermopile sensors 9 preferably correspond to the cookware one to one, and the center line of the infrared thermopile sensors 9 and the center line of the cookware are on the same straight line, that is, the center of the infrared thermopile sensors 9 is located right above the center of the cookware, so that the accuracy of temperature detection is improved;
the main board 5 is used for determining the current temperature of the object 3 to be measured according to the output voltage; and generating a control signal according to the current temperature, the temperature duration and the temperature change rate, thereby controlling the range machine 1 and the cooking appliance 4.
The working process of the infrared thermopile temperature measurement module 2 is as follows: the infrared waves 66 are emitted, part of the infrared waves 6 are absorbed and reflected by ambient air 77, most of the infrared waves are absorbed by the sensor 9 through the optical filter 88, the potential difference between the surface temperature and the ambient temperature of the object to be measured is calculated through the main board 510, and control signals are generated to intelligently operate the range hood 1 and the cooking utensil 4. Any object surface radiates infrared light, and the infrared thermopile sensor 9 absorbs infrared light energy and outputs a voltage signal proportional to temperature. The core of the sensor is generally composed of two parts, a thermopile and a thermistor. The thermopile shown in FIG. 1 utilizes the thermal effect of infrared radiation, and the functional relationship between output voltage and temperature is
Wherein T is0Temperature of TaThe background temperature is, e is the emissivity of the measured object, the range value of e is 0.8-1.0, and C is a constant.
That is, the temperature T determinable by the motherboard 5 after the determination of the output voltage U0. Thereafter, the main board 5 generates a control signal according to the current temperature, the temperature duration and the temperature change rate, so as to control the range machine 1 and the cooking utensil 4 (please refer to table 1), specifically: the main board 5 respectively judges the current temperature T, the first preset temperature a and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generates corresponding control signals, so that the range hood 1 and the cooking appliance 4 are controlled by corresponding control actions:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, the cooking process is normal, no dry-burning risk exists, a first control signal is generated, and the cooking range 4 is controlled to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T and C is less than or equal to X, a certain dry burning risk exists, a second control signal is generated, and an indicator light of the cigarette machine 1 is controlled to flicker, which is the first early warning step;
if T is more than or equal to A, B and T is more than or equal to X, the dry burning risk is larger, a third control signal is generated, the indicator light is controlled to flicker, and the buzzer of the range hood 1 buzzes once, which is the second step of early warning;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, the dry burning risk is further increased, a fourth control signal is generated, and the buzzer is controlled to sound for a long time, which is the third early warning step;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove 4 to close.
TABLE 1
It can be seen that with the increase of the current temperature and the temperature duration, from the early warning of the first step to the early warning of the third step, the early warning form is gradually enhanced, the indicator light flickers, the buzzer sounds once when the indicator light flickers, and the buzzer sounds once when the buzzer sounds for a long time, and the early warning intervenes in advance through sectional alarming and control, so that the dry burning dangerous case is greatly reduced, the range hood 1 and the stove 4 are more intelligent and safer to remind a user of the possibility of dry burning, and the dry burning can be effectively prevented.
In the embodiment of the invention, A can range from 220 ℃ to 300 ℃; the range of D can be 20-50 ℃; the range of t can be 10-30 s, and a user can select the t according to actual conditions.
In addition, considering whether the stove 4 contains an object to be heated and the type of the object to be heated, different values can be given to the predetermined rate X, and therefore the main board 5 is further used for selecting different predetermined rates X according to the characteristics of the object to be measured 3, so that the dry burning prevention misjudgment probability caused by different types of the object to be measured 3 is reduced.
If the object 3 to be detected is only the pot, determining that the range of X is preferably 2-3 ℃/s;
if the object 3 to be measured is a pot and an object to be heated, and the object to be heated is water, determining that the range of X is preferably 0.5-1 ℃/s;
if the object 3 to be measured is a pot and an object to be heated, and the object to be heated includes oil, it is determined that the range of X is preferably 0.8 to 1.5 ℃/s.
When the temperature that detects is unusual, the temperature sensing probe of infrared thermopile temperature measurement module 2 can detect the unusual high temperature of the object 3 that awaits measuring automatically, and infrared thermopile temperature measurement module 2 can send intelligence to the main control board of cigarette machine 1 automatically rapidly and remind, and the main control board of cigarette machine 1 prevents the emergence of dry combustion method to 4 radio communication of cooking utensils. The communication mode of cigarette machine 1 and cooking utensils 4 linkage can adopt bluetooth, infrared, also can use modes such as RF radio frequency communication, WIFI wireless communication.
The control and the alarm can be processed in sections, and can also be controlled in one step, if dangerous situations occur, the smoke machine 1 and the cooking utensil 4 can be controlled in different temperatures and different operation modes, and the firepower of the cooking utensil 4 can also be closed in one step.
It should be further explained that the main factors influencing the temperature measurement of the infrared thermopile module include:
1. the emissivity of the object to be detected 3 is preferably 0.9-0.98;
2. wavelength length: the optical filter 8 (such as a silicon-based filter screen sheet) filters stray light in a certain wavelength range, the stray light does not include infrared light, the hardness of the silicon-based optical filter 8 is high, long-term wiping can be achieved, wiping is avoided, and the service life and the precision of a device are guaranteed;
3. the HL is than, the proportional relation of the regional diameter L in detection temperature's detection distance H of cooking utensils distance lampblack absorber infrared sensor and detection temperature promptly, can be 1/5 ~ 1/3, can make the infrared sensor moderate with the area of the distance on 3 surfaces of the object to be measured and detection region like this, realizes more accurate temperature detection, and then realizes the dry combustion method function of high accuracy. The diameter of the bottom surface of the pot is considered, and the range of L is preferably 150-300 mm, so that the comprehensive measurement of the temperature of the surface of the object to be measured 3 by the infrared sensor is guaranteed.
The embodiment of the invention also provides an anti-dry heating method, which comprises the following steps:
s1, arranging a non-contact temperature measuring module at the smoke machine, wherein the smoke machine and the kitchen range are at least partially arranged oppositely;
and S2, detecting the temperature state of the surface of the object to be detected through the non-contact temperature measuring module.
The surface of the object to be measured comprises a bottom surface of a pot placed on the cooker and/or an upper surface of an object to be heated covered in the pot, namely when the object to be heated is not placed in the pot, the surface of the object to be measured refers to the bottom surface of the pot on the cooker; when an object to be heated is placed in the pot, the surface of the object to be heated at least partially covers the upper surface of the object to be heated in the pot and the bottom surface of the pot, which is not covered by the object to be heated, of the pot. The temperature state comprises the current temperature of the object to be measured, the temperature duration and the temperature change rate, wherein the temperature change rate is the value of the slope of the temperature change between the current temperature and the previous moment;
and S3, controlling the range hood and the kitchen range according to the temperature state.
Step S3 specifically includes the steps of:
respectively judging the current temperature T, the first preset temperature A and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generating corresponding control signals so as to control the range hood and the cooker:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, generating a first control signal to control the stove to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T is more than or equal to T, and C is less than or equal to X, generating a second control signal to control the indicator light of the cigarette machine to flicker;
if T is more than or equal to A, B and T is more than or equal to X, generating a third control signal, controlling the indicator light to flash and the buzzer of the cigarette machine to sound once;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, generating a fourth control signal to control the buzzer to sound for a long time;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove to close.
In addition, the mainboard is also used for selecting different predetermined speed rates X according to the characteristics of the object to be detected, thereby reducing the probability of dry burning prevention misjudgment caused by different types of the object to be detected:
if the object to be detected is only the pot, determining that the range of X is 2-3 ℃/s;
if the object to be measured is a pot and an object to be heated, and the object to be heated is water, determining the range of X to be 0.5-1 ℃/s;
and if the object to be heated is a pot and an object to be heated, and the object to be heated comprises oil, determining that the range of X is 0.8-1.5 ℃/s.
The embodiment of the invention also provides a cigarette making machine which comprises the anti-dry heating device.
The embodiment of the invention also provides complete equipment of the smoke stove, which comprises the smoke machine and the stove at least partially arranged opposite to the smoke machine.
In conclusion, the dry combustion preventing device and method, the range hood and the range hood complete equipment integrate the dry combustion preventing function on the range hood, avoid the influences of high-temperature flame, oil stain, pot bottom carbon deposition, contact time and the like, determine the temperature state of the surface of the object to be detected through the non-contact temperature measuring module, can quickly and accurately detect the temperature state of the surface of the object to be detected compared with the temperature measurement of a traditional metal heat-sensitive sensor, further ensure the accuracy of judging the dry combustion condition, adopt corresponding control actions and ensure the personal and property safety of users.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a prevent dry combustion method device which characterized in that, it sets up in cigarette machine (1) department, cigarette machine (1) and cooking utensils (4) at least partial relative placement, prevent dry combustion method device includes:
the non-contact temperature measurement module is used for detecting the temperature state of the surface of the object (3) to be measured; the non-contact temperature measuring module is also used for controlling the range hood (1) and the kitchen range (4) according to the temperature state;
the temperature state comprises the current temperature, the temperature duration and the temperature change rate of an object (3) to be measured, the temperature change rate is a slope value of the change of the current temperature and the temperature at the previous moment, and the surface of the object (3) to be measured comprises a bottom surface of a cooker placed on the cooker and an upper surface of an object to be heated covered in the cooker;
non-contact temperature measurement module is infrared thermopile temperature measurement module (2), and this infrared thermopile temperature measurement module (2) include:
the optical filter (8) is used for filtering stray light emitted by the object to be detected (3) and determining infrared light emitted by the object to be detected (3), wherein the stray light does not include infrared light;
an infrared thermopile sensor (9) for receiving the infrared light and determining an output voltage;
the main board (5) is used for determining the current temperature of the object (3) to be measured according to the output voltage; and generating control signals to control the range hood (1) and the cooktop (4) in dependence on the current temperature, temperature duration and rate of temperature change;
the main board (5) generates a control signal according to the current temperature, the temperature duration and the temperature change rate, so as to control the range hood (1) and the kitchen range (4), specifically: the main board (5) respectively judges the current temperature T, the first preset temperature A and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generates corresponding control signals, so that the range hood (1) and the cooker (4) are controlled:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, a first control signal is generated to control the stove (4) to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T is more than or equal to T, and C is less than or equal to X, a second control signal is generated, and the indicator light of the range hood (1) is controlled to flicker;
if T is more than or equal to A, B and is less than or equal to T, and C is more than or equal to X, generating a third control signal, controlling the indicator light to flash and the buzzer of the range hood (1) to sound once;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, generating a fourth control signal to control the buzzer to sound for a long time;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove (4) to be closed.
2. The device of claim 1, wherein said A is in the range of 220 ℃ to 300 ℃; the range of D is 20-50 ℃; the range of t is 10-30 s.
3. The anti-dry heating apparatus according to claim 1,
the main board (5) is also used for judging the range of X according to the characteristics of the object (3) to be detected:
if the object (3) to be measured is the pot and the object to be heated placed in the pot, and the object to be heated is water, determining that the range of X is 0.5-1 ℃/s;
and if the object (3) to be heated is the pot and the object to be heated, and the object to be heated comprises oil, determining that the range of X is 0.8-1.5 ℃/s.
4. The anti-dry heating device according to claim 3, wherein the area of the temperature detecting area of the non-contact temperature measuring module is not larger than the area of the bottom surface of the pot.
5. The dry-burning preventing device according to claim 3, wherein the infrared thermopile sensors (9) are in one-to-one correspondence with the cookware, and a center line of the infrared thermopile sensors (9) and a center line of the cookware are on a straight line.
6. An anti-dry burning method is characterized by comprising the following steps:
a non-contact temperature measuring module is arranged at the smoke machine, and the smoke machine and the kitchen range are at least partially oppositely arranged;
detecting the temperature state of the surface of the object to be detected through the non-contact temperature measuring module, wherein the temperature state comprises the current temperature of the object to be detected, the temperature duration and the temperature change rate, and the temperature change rate is the slope value of the temperature change between the current temperature and the temperature change at the previous moment; the surface of the object to be measured (3) comprises a bottom surface of a pot placed on the stove and an upper surface of an object to be heated covered in the pot;
controlling the range hood and the cooking range according to the temperature state;
controlling the range hood and the kitchen range according to the temperature state, specifically: respectively judging the current temperature T, the first preset temperature A and the second preset temperature D, the temperature duration B and the preset temperature time T, and the temperature change rate C and the preset rate X, and generating corresponding control signals so as to control the range hood and the cooker:
if T is less than or equal to A and B is less than or equal to T; or T is less than or equal to A, B and is more than or equal to T, and C is less than or equal to X; or T is more than or equal to A, B and X is less than or equal to C, generating a first control signal to control the stove to maintain the current state;
if T is less than or equal to A, B and is more than or equal to T, C is more than or equal to X and simultaneously satisfies; or T is more than or equal to A, B and T is more than or equal to T, and C is less than or equal to X, generating a second control signal to control the indicator light of the cigarette machine to flicker;
if T is more than or equal to A, B and T is more than or equal to X, generating a third control signal, controlling the indicator light to flash and the buzzer of the cigarette machine to sound once;
if T is more than or equal to A, B and more than or equal to T and C is more than or equal to X, generating a fourth control signal to control the buzzer to sound for a long time;
and if T is more than or equal to A + D, B and more than or equal to T and C is more than or equal to X, generating a fifth control signal to control a gas control valve of the stove to close.
7. The method of claim 6, further comprising the steps of: judging the range of X according to the characteristics of the object to be detected:
if the object to be heated is the pot and the object to be heated placed in the pot, and the object to be heated is water, determining that the range of X is 0.5-1 ℃/s;
and if the object to be measured is the pot and the object to be heated, and the object to be heated comprises oil, determining that the range of the X is 0.8-1.5 ℃/s.
8. A machine as claimed in any one of claims 1 to 5 including a dry-fire prevention device.
9. A smoke cooker kit comprising a machine as claimed in claim 8, and a cooker positioned at least partially opposite the machine.
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| CN201910302017.5A CN110043926B (en) | 2019-04-15 | 2019-04-15 | Dry burning prevention device and method, smoke machine and smoke stove complete equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910302017.5A CN110043926B (en) | 2019-04-15 | 2019-04-15 | Dry burning prevention device and method, smoke machine and smoke stove complete equipment |
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| CN110043926B true CN110043926B (en) | 2020-08-18 |
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| CN111006254A (en) * | 2019-10-30 | 2020-04-14 | 北京万羿科技有限公司 | Intelligent temperature control induction cooker and control method thereof |
| CN111179561A (en) * | 2019-12-24 | 2020-05-19 | 徐承柬 | Kitchen ignition monitoring and judging method and kitchen fire monitoring and judging method |
| CN111297207B (en) * | 2020-02-14 | 2021-05-14 | 珠海格力电器股份有限公司 | Method and device for controlling kitchen ware to enter safe trusteeship mode |
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| CN205261676U (en) * | 2015-11-13 | 2016-05-25 | 广东万和新电气股份有限公司 | Infrared temperature measurement range hood |
| CN105333477B (en) * | 2015-11-18 | 2018-05-01 | 广东美的厨房电器制造有限公司 | Cigarette stove coordinated control system and method |
| KR101949913B1 (en) * | 2017-10-31 | 2019-02-20 | 린나이코리아 주식회사 | Gas Range with Automatic Diameter Detection and Its Automatic Control Method |
| CN207584850U (en) * | 2017-12-12 | 2018-07-06 | 众智光电科技股份有限公司 | Smoke exhaust ventilator |
| CN108302563B (en) * | 2018-01-10 | 2020-08-04 | 广东美的厨房电器制造有限公司 | Gas stove and control method thereof |
| CN208205116U (en) * | 2018-03-05 | 2018-12-07 | 杭州老板电器股份有限公司 | Kitchen ventilator and cigarette stove complete set of equipments |
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