CN115682047A - Safety protection device and method for kitchen range - Google Patents
Safety protection device and method for kitchen range Download PDFInfo
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- CN115682047A CN115682047A CN202110829416.4A CN202110829416A CN115682047A CN 115682047 A CN115682047 A CN 115682047A CN 202110829416 A CN202110829416 A CN 202110829416A CN 115682047 A CN115682047 A CN 115682047A
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Abstract
The invention discloses a safety protection device and a method for a stove, wherein the safety protection device for the stove comprises: the electromagnetic valve is used for controlling the opening and closing of the cooker; the first thermocouple is used for sensing the temperature of the bottom of a cooker placed on the cooker; the second thermocouple is used for sensing the temperature of flame generated at the cooking range; the power supply is a voltage-variable power supply with adjustable voltage; the electromagnetic valve, the first thermocouple, the second thermocouple and the power supply are sequentially connected to form a loop, and the difference of thermoelectric potentials generated by the second thermocouple and the first thermocouple and the power supply jointly provide starting voltage for the electromagnetic valve. The voltage-adjustable variable-voltage power supply is arranged, so that a user can change the preset flameout temperature by adjusting the output voltage of the power supply in the use process to adapt to different cooking conditions, the anti-dry-burning function of the cooker safety protection device can be suitable for cookers with different heat conductivity coefficients and different cooking food materials, and the use effect of the user is enhanced.
Description
Technical Field
The invention relates to the technical field of kitchen utensils, in particular to a safety protection device for a kitchen range, and particularly relates to a safety protection method for the kitchen range.
Background
Gas cookers are an indispensable part of daily life of people, and the gas cookers are kitchen appliances heated by direct fire using gas fuel such as liquefied petroleum gas, artificial gas, natural gas, and the like. The gas stove is called a stove plate, the popularity degree of which is unknown, but a passing concept is difficult to see. Such as a firewood range, a kerosene stove, a briquette stove, etc. Gas stoves are mainly classified into liquefied gas stoves, and natural gas stoves, depending on the source of the gas. According to the range, the range is divided into a single range, a double range and a multi-range.
The gas-cooker is comparatively convenient when using, and is economical and practical, compares the air pollution that can effectual less dust particle caused with traditional coal kitchen. The gas stove is clean and energy-saving, is generally used in household life at present, but the safety of the gas stove in use is generally concerned all the time, people need to pay attention to the combustion condition of the gas stove all the time, such as water burning and the like, the phenomenon that gas is still released due to the fact that a gas valve is forgotten to be closed or gas is extinguished due to negligence of people in the use process, the gas stove can heat a cooker for a long time, water in the cooker is burnt out due to long-time heating, the cooker is burnt out if the water is dried, fire disasters can be caused if the water is burnt out if the water is light, and leaked gas can also threaten the safety of lives and properties of people.
Along with social development, the living standard of people is improved, safety consciousness in life is continuously strengthened, flameout protection of the gas stove is used as a necessary safety use measure of the gas stove, the dry burning prevention gas stove is affected by the fact that a dry burning prevention technology is not mature enough, and the market share is not high.
The flameout set temperature of the existing dry-burning prevention gas stove cannot be adjusted, so that the problem that the dry-burning prevention gas stove is flameout mistakenly due to the fact that different food materials are cooked and different pots used for cooking the food materials are caused.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a safety protection device for a stove, which solves the problem that the preset flameout temperature cannot be adjusted by the conventional safety protection device for the stove.
In order to solve the technical problems, the invention adopts the technical scheme that the basic concept is as follows:
a cooking utensils safety device, it includes:
the electromagnetic valve is used for controlling the opening and closing of the cooker;
the first thermocouple is used for sensing the temperature of the bottom of a cooker placed on the cooker;
the second thermocouple is used for sensing the temperature of flame generated at the cooking range;
the power supply is a voltage-variable power supply with adjustable voltage;
the electromagnetic valve, the first thermocouple, the second thermocouple and the power supply are sequentially connected to form a loop, and the difference of thermoelectric potentials generated by the second thermocouple and the first thermocouple and the power supply jointly provide starting voltage for the electromagnetic valve.
Furthermore, the cathodes of the first thermocouple and the second thermocouple are connected with each other, the anode of the first thermocouple and the anode of the second thermocouple are respectively connected with the anode and the cathode of the power supply to form a loop, and the electromagnetic valve is connected in series in the loop;
preferably, the solenoid valve is connected to a circuit between the positive pole of the power supply and the positive pole of the first thermocouple.
Furthermore, a first voltmeter is connected in parallel at the positive electrode of the first thermocouple and the positive electrode of the second thermocouple and is used for detecting the difference between thermoelectric potentials generated by the second thermocouple and the first thermocouple;
or, the two ends of the electromagnetic valve are connected in parallel with a second voltmeter for detecting the voltages at the two ends of the electromagnetic valve, namely, the sum of the difference between thermoelectric potentials generated by the second thermocouple and the first thermocouple and the power supply voltage is detected.
Further, the first thermocouple and the second thermocouple are both installed on a burner of the stove.
Preferably, the first thermocouple is arranged at the center of the burner, one end of the first thermocouple extends upwards out of the burner, and the second thermocouple is arranged at the flame port adjacent to the burner.
Further, the first thermocouple is installed on the burner in a manner that the first thermocouple can move up and down in a telescopic manner through an elastic piece.
Preferably, the first thermocouple has a free state and a compressed state:
when in a compression state, one end of the first thermocouple extending out of the burner is abutted against the bottom of the cookware;
when the first thermocouple is switched to the free state, the end of the first thermocouple extending out of the burner extends out by a certain length more than that in the compressed state.
Furthermore, the power supply is provided with a detection unit for detecting the output voltage of the power supply.
The second purpose of the invention is to provide a safety protection method for a stove equipped with the safety protection device for the stove, and specifically, the following technical scheme is adopted:
acquiring thermoelectric force difference U1 and power supply voltage U2 generated by a second thermocouple and a first thermocouple;
judging whether the U1+ U2 reaches the opening critical voltage U of the electromagnetic valve;
and when the U1+ U2 is smaller than the set value U, closing the electromagnetic valve and controlling the stove to extinguish.
Further, the first thermocouple generates a variable first thermoelectric force when heated, the second thermocouple generates a constant second thermoelectric force when heated by flame burning heat, and the difference of the second thermoelectric force minus the first thermoelectric force is the difference U1 between the thermoelectric forces generated by the second thermocouple and the first thermocouple;
a detection unit arranged on the power supply acquires the output voltage U2 of the power supply;
the sum of the detected thermoelectric force difference U1 generated by the second thermocouple and the first thermocouple and the output voltage U2 of the power supply is the sum of the voltage U received by the electromagnetic valve;
preferably, a first voltmeter arranged on the loop can directly detect the difference U1 between the thermoelectric potentials generated by the second thermocouple and the first thermocouple.
Further, a second voltmeter arranged on the loop can directly detect the input voltage U sum between the anode and the cathode of the electromagnetic valve;
the sum of U is the sum of the difference U1 between thermoelectric potentials generated by the second thermocouple and the first thermocouple and the voltage U2 of the power supply.
Further, when the sum of the voltage U received by the electromagnetic valve is smaller than a set value U, the electromagnetic acting force borne by the valve core of the electromagnetic valve is smaller than the spring elasticity, so that the valve core generates closing displacement, the electromagnetic valve is closed, and the stove is extinguished;
preferably, when the stove is flamed out, the temperature detected by the first thermocouple is flamed out at flameout temperature T;
the power supply is a variable voltage power supply capable of adjusting output voltage, and when the output voltage U2 of the power supply is reduced, the flameout temperature T corresponding to the stove is reduced; when the voltage U2 of the power supply is increased, the flameout temperature T corresponding to the stove is increased;
further preferably, when the cooker is not placed on the cooker, the first thermocouple is heated to the flameout temperature T by flame baking and flameout is rapidly carried out, and the cooker can rapidly and automatically flameout.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the invention is provided with the variable voltage power supply with adjustable voltage, so that a user can change the preset flameout temperature by adjusting the output voltage of the power supply in the use process to adapt to different cooking conditions, the anti-dry heating function of the cooker safety protection device can be suitable for cookers with different heat conductivity coefficients and different cooking food materials, and the use effect of the user is enhanced.
The invention controls the on-off of the electromagnetic valve through the thermal potential difference of the second thermocouple and the first thermocouple and the power supply voltage together, thereby controlling the on-off of the gas pipeline, further controlling the flameout of the cooker, fully utilizing the characteristics of the thermocouples, utilizing the thermoelectric force generated by flame ignition to counteract the thermoelectric force generated by the first thermocouple, and ensuring that the whole energy consumption of the device is smaller.
In addition, the elastic piece is arranged between the first thermocouple and the burner, so that the first thermocouple can extend upwards under the action of the elastic force of the elastic piece: when a cooker is placed on the cooker, the cooker presses down the first thermocouple, so that the first thermocouple is tightly attached to the bottom of the cooker to generate a thermoelectric force in direct proportion to the temperature of the bottom of the cooker, when the temperature of the bottom of the cooker reaches a preset value, the electromagnetic valve is closed, the cooker is extinguished, and therefore the dry burning prevention function is achieved; when a cooker is not placed on the cooker, the first thermocouple can extend upwards under the elastic action of the elastic piece, so that the first thermocouple is baked by flame, the temperature is rapidly increased to a preset temperature, and the gas cooker is rapidly flamed out.
In addition, the voltage of the power supply is controlled to be lower than the critical value of the voltage required by opening the electromagnetic valve all the time, so that the electromagnetic valve is always in a closed state when the ignition is not performed, and the safety of the device is ensured.
Meanwhile, the invention has simple structure and obvious effect and is suitable for popularization and use.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of the structural principle of the safety protection device of the cooking utensil of the present invention;
FIG. 2 is a schematic structural diagram of a safety protection device of a cooking utensil in another embodiment of the invention;
fig. 3 is a schematic structural diagram of a safety protection device of a cooking range in another embodiment of the invention.
Description of the main elements in the figures:
1. a first thermocouple; 2. a second thermocouple; 3. an electromagnetic valve; 4. a power source; 5. a first wire electrode; 6. a second wire electrode; 7. a third wire electrode; 8. a fourth wire electrode; 9. a first voltmeter; 10. a second voltmeter.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be construed broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the embodiment of the invention discloses a safety protection device for a cooking utensil, which comprises a first thermocouple 1 for sensing the temperature of the bottom of the cooking utensil placed on the cooking utensil and a second thermocouple 2 for sensing the temperature of flame generated at the cooking range.
Preferably, in this embodiment, the detection end of the second thermocouple 2 is heated, and the free end generates a thermoelectric force for controlling the opening of the electromagnetic valve 3, the power source 4 provides a compensation voltage for the opening of the electromagnetic valve 3, the detection end of the first thermocouple 1 is heated, and the free end generates a thermoelectric force opposite to that of the free end of the second thermocouple 2, that is, the voltage applied to the electromagnetic valve 3 is the thermoelectric force of the free end of the second thermocouple 2 plus the compensation voltage provided by the power source 4, and then minus the thermoelectric force generated by the free end of the first thermocouple 1.
Preferably, in this embodiment, a valve core is disposed in the electromagnetic valve 3, and the positive and negative electrodes of the electromagnetic valve 3 receive voltage and form electromagnetic force for controlling the opening of the electromagnetic valve 3 inside the electromagnetic valve 3; a spring for keeping the spool of the solenoid valve 3 closed is also provided inside the solenoid valve 3. When the electromagnetic force borne by the valve core of the electromagnetic valve 3 is larger than the spring elasticity borne by the valve core of the electromagnetic valve 3, the electromagnetic valve 3 is opened to realize the ventilation of the gas stove; when the electromagnetic valve 3 is not under voltage or the electromagnetic force generated by the voltage applied to the electromagnetic valve 3 is smaller than the elastic force of the spring in the electromagnetic valve 3, the electromagnetic valve 3 is closed, and the gas-off of the gas stove is realized.
Preferably, in this embodiment, the first thermocouple 1 and the second thermocouple 2 are both installed on a burner of the stove, wherein the first thermocouple 1 is placed at the center of the burner, the detection end of the first thermocouple 1 extends upwards out of the burner, and the detection end of the second thermocouple 2 is placed at a position close to a flame port of the burner and is burned by flame.
Preferably, the power supply 4 is a variable voltage power supply 4 with adjustable voltage, and the power supply 4 is provided with a detection unit for detecting the output voltage thereof. In this embodiment, since the detecting end of the second thermocouple 2 is directly burned by flame, and the flame temperature is basically unchanged, the thermoelectric force generated by the free end of the second thermocouple 2 is constant, and the elastic force of the spring inside the electromagnetic valve 3 is kept constant, that is, the electromagnetic force required to open the electromagnetic valve 3 is a constant value, that is, the opening critical voltage of the electromagnetic valve 3 is a constant value, so the variables in the loop are the temperature of the portion detected by the first thermocouple 1 and the output voltage of the power supply 4.
In this embodiment, if the output voltage of the power source 4 is fixed to a value, and the thermoelectric potential generated at the free end of the first thermocouple 1 gradually increases with the gradual temperature rise at the position detected by the detection end of the first thermocouple 1, the difference between the thermoelectric potential generated by the second thermocouple 2 and the thermoelectric potential generated at the free end of the first thermocouple 1 gradually decreases, that is, the total electromotive force generated by the second thermocouple 2 and the first thermocouple 1 decreases, and the output voltage of the power source 4 does not change, so that the voltage acting on the electromagnetic valve 3 gradually decreases with the temperature rise at the position detected by the first thermocouple 1, and when the temperature rise at the position detected by the first thermocouple 1 reaches a certain level, the electromagnetic force generated by the voltage applied to the electromagnetic valve 3 is smaller than the elastic force of the spring inside the electromagnetic valve 3, so that the electromagnetic valve 3 is closed, and the gas stove is turned off and extinguished.
In this embodiment, when the gas stove is extinguished, the temperature detected by the first thermocouple 1 is the extinction temperature. If the compensation voltage provided by the power supply 4 is adjusted to be small, the electromagnetic valve 3 can be maintained to be opened only by the first thermocouple 1 and the second thermocouple 2 providing larger thermoelectric force, because the flame burning temperature is basically kept unchanged, namely the temperature of the position detected by the second thermocouple 2 is basically unchanged, and the thermoelectric force generated by the free end of the second thermocouple 2 is constant, when the output voltage of the power supply 4 is reduced and the electromagnetic valve 3 is closed, the upper limit value of the temperature of the position detected by the detection end of the first thermocouple 1 is reduced, namely the flameout temperature is reduced; if the compensation voltage provided by the power source 4 is increased, the thermoelectric force provided by the first thermocouple 1 and the second thermocouple 2 is required to be reduced, and since the flame ignition temperature is basically kept unchanged, namely, the temperature of the position detected by the second thermocouple 2 is basically kept unchanged, and the thermoelectric force generated by the free end of the second thermocouple 2 is constant, the upper limit value of the temperature of the position detected by the detection end of the first thermocouple 1 is increased when the electromagnetic valve 3 is closed, namely, the flameout temperature is increased.
According to the invention, the opening and closing of the electromagnetic valve 3 are controlled by the thermal potential difference of the second thermocouple 2 and the first thermocouple 1 and the output voltage of the power supply 4 together, so that the on-off of a gas pipeline is controlled, the flameout of a cooker is further controlled, the characteristics of the thermocouples are fully utilized, and the overall energy consumption of the device is relatively low. Meanwhile, the invention utilizes the characteristics that the flame temperature is basically unchanged and the critical voltage for controlling the opening and closing of the electromagnetic valve 3 is certain, so that the opening and closing of the electromagnetic valve 3 are only influenced by the temperature measured by the first thermocouple 1 and the voltage of the power supply 4, the thermoelectric force generated by flame burning is fully utilized to counteract the thermoelectric force generated by the first thermocouple 1, meanwhile, the flame-out temperature can be adjusted by changing the voltage of the power supply 4, a user can reasonably set the flame-out temperature according to different cookers and different cooking food materials, and the use effect of the user is enhanced.
Example one
As shown in FIG. 1, the embodiment of the invention discloses a safety protection device for a stove, which comprises a first thermocouple 1 installed at the central position of a burner and a second thermocouple 2 used for being burned by flame.
Preferably, in this embodiment, the first thermocouple 1, the electromagnetic valve 3, the power supply 4, and the second thermocouple 2 are sequentially connected through a wire electrode, wherein cathodes of the first thermocouple 1 and the second thermocouple 2 are connected through a first wire electrode 5, an anode of the first thermocouple 1 is connected with the electromagnetic valve 3 through a second wire electrode 6, an anode of the electromagnetic valve 3 is connected with an anode of the power supply 4 through a third wire electrode 7, and a cathode of the power supply 4 is connected with an anode of the second thermocouple 2 through a fourth wire electrode 8.
In the embodiment, the first thermocouple 1 is arranged at the central position of the burner, the first thermocouple 1 is not burnt by flame in the cooking process, the detection end of the first thermocouple 1 extends upwards and is used for contacting with the bottom of a pot of the pot to detect the temperature of the bottom of the pot, and a first thermoelectric force generated by the free end of the first thermocouple 1 is gradually increased along with the gradual rise of the temperature of the bottom of the pot; the second thermocouple 2 is arranged at a flame port close to the burner, the detection end of the second thermocouple 2 is directly burned by flame in the cooking process, and the temperature of the flame is stable, so that the second thermoelectric force generated by the free end of the second thermocouple 2 is constant, namely the total electromotive force between the second thermocouple 2 and the anode of the first thermocouple 1 is the second thermoelectric force minus the first thermoelectric force.
As shown in fig. 2, in the present embodiment, a first voltmeter 9 is connected in parallel to the positive electrode of the first thermocouple 1 and the positive electrode of the second thermocouple 2, and is used for detecting a difference value between thermoelectric potentials generated by the second thermocouple 2 and the first thermocouple 1.
In this embodiment, the detection end of the second thermocouple 2 is heated, and the free end generates a second thermoelectric force for controlling the opening of the electromagnetic valve 3, the power supply 4 provides a compensation voltage for the opening of the electromagnetic valve 3, the detection end of the first thermocouple 1 is heated, and the free end generates a first thermoelectric force opposite to the free end of the second thermocouple 2, that is, the voltage applied to the electromagnetic valve 3 is the compensation voltage provided by the power supply 4 in addition to the second thermoelectric force, and then the first thermoelectric force is subtracted.
Preferably, in this embodiment, a spring for keeping the electromagnetic valve 3 closed is disposed in the electromagnetic valve 3, that is, when the electromagnetic force generated by the voltage applied to the electromagnetic valve 3 is greater than the elastic force of the spring inside the electromagnetic valve 3, the electromagnetic valve 3 is opened to realize ventilation of the gas stove; when the electromagnetic valve 3 is not under voltage or the electromagnetic force generated by the voltage applied to the electromagnetic valve 3 is smaller than the elastic force of the spring in the electromagnetic valve 3, the electromagnetic valve 3 is closed, and the gas-off of the gas stove is realized.
Preferably, the power supply 4 is a voltage-adjustable variable voltage power supply 4. In this embodiment, since the detecting end of the second thermocouple 2 is directly burned by flame, and the flame temperature is substantially unchanged, the second thermoelectric force generated by the free end of the second thermocouple 2 is substantially unchanged, and the elastic force of the spring inside the electromagnetic valve 3 is kept constant, i.e. the electromagnetic force required for opening the electromagnetic valve 3 is a constant value, so the variables in the loop are the temperature of the portion detected by the first thermocouple 1 and the output voltage of the power supply 4.
In this embodiment, if the output voltage of the power supply 4 is fixed to a value, and the first thermoelectric force generated at the free end of the first thermocouple 1 increases gradually as the temperature at the position detected by the detection end of the first thermocouple 1 increases gradually, the difference between the second thermoelectric force generated by the second thermocouple 2 and the first thermoelectric force generated at the free end of the first thermocouple 1 decreases gradually, that is, the total electromotive force generated by the second thermocouple 2 and the first thermocouple 1 decreases, which is detected by the first voltmeter 9, while the output voltage of the power supply 4 does not change, so that the voltage applied to the solenoid valve 3 decreases gradually as the temperature at the position detected by the first thermocouple 1 increases, and when the temperature at the position detected by the first thermocouple 1 increases to a certain level, the electromagnetic force generated by the voltage applied to the solenoid valve 3 is smaller than the elastic force of the spring inside the solenoid valve 3, the solenoid valve 3 is closed, the gas stove is turned off and turned off, and the temperature detected by the first thermocouple 1 is the turn off temperature when the gas stove is turned off.
If the compensation voltage provided by the power supply 4 is adjusted to be small, the electromagnetic valve 3 can be maintained to be opened only by the first thermocouple 1 and the second thermocouple 2 providing larger electromotive force, and as the flame burning temperature is basically kept unchanged, namely the temperature of the position detected by the second thermocouple 2 is basically unchanged, and the thermoelectric force generated by the free end of the second thermocouple 2 is constant, when the output voltage of the power supply 4 is reduced and the electromagnetic valve 3 is closed, the upper limit value of the temperature of the position detected by the detection end of the first thermocouple 1 is reduced, namely the flameout temperature is reduced; if the compensation voltage provided by the power source 4 is adjusted to be large, the thermoelectric force provided by the first thermocouple 1 and the second thermocouple 2 needs to be reduced, and since the flame burning temperature is basically kept unchanged, namely the temperature of the position detected by the second thermocouple 2 is basically unchanged, and the thermoelectric force generated by the free end of the second thermocouple 2 is constant, the upper limit value of the temperature of the position detected by the detection end of the first thermocouple 1 is increased when the electromagnetic valve 3 is closed, namely the flameout temperature is increased.
Therefore, use the cooking utensils to cook the in-process, the user can be according to different pans and different edible materials, adjusts power 4's output voltage to certain size to the temperature maximum value that can reach at the bottom of the pan when changing solenoid valve 3 and closing, flame-out temperature promptly, when reaching this temperature at the bottom of the pan, solenoid valve 3 is automatic closed, thereby prevents to cause the condition emergence of pan dry combustion method because of user's carelessness, improves the security.
Preferably, in this embodiment, the first thermocouple 1 and the second thermocouple 2 are made of the same material.
Preferably, in this embodiment, the output voltage of the power supply 4 is always smaller than the threshold voltage for opening the electromagnetic valve 3, so as to prevent the electromagnetic valve 3 from being opened by mistake under the action of the power supply 4, and thus, the gas leakage is prevented.
According to the invention, the opening and closing of the electromagnetic valve 3 are controlled by the thermal potential difference of the second thermocouple 2 and the first thermocouple 1 and the output voltage of the power supply 4 together, so that the on-off of a gas pipeline is controlled, the flameout of a cooker is further controlled, the characteristics of the thermocouples are fully utilized, and the overall energy consumption of the device is relatively low.
Meanwhile, by utilizing the characteristics that the flame temperature is basically unchanged and the critical voltage for controlling the opening and closing of the electromagnetic valve 3 is certain, the opening and closing of the electromagnetic valve 3 is only influenced by the temperature measured by the first thermocouple 1 and the output voltage of the power supply 4, the thermal potential generated by flame burning is fully utilized to counteract the thermal potential generated by the first thermocouple 1, the flameout temperature can be adjusted by changing the output voltage of the power supply 4, a user can reasonably set the flameout temperature preset value according to different cookers and different cooking food materials, the anti-dry burning function of the cooker safety protection device disclosed by the invention is not selected, and the use effect of the user is enhanced.
Preferably, in this embodiment, the first thermocouple 1 is installed in the central position of the burner through an elastic member, and the detection end of the first thermocouple 1 extends out of the burner, so that the first thermocouple 1 can float up and down under the action of the elastic force, and the first thermocouple 1 has a free state and a compression state: when a cooker is placed on a cooker, the first thermocouple 1 enters a compression state, one end (namely a detection end) of the first thermocouple 1 extending out of the burner is abutted against the bottom of the cooker, and the bottom of the cooker is tightly attached to the detection end of the first thermocouple 1 and presses the first thermocouple 1 down for a certain distance, so that the detection value of the first thermocouple 1 is more accurate; when the cooker is not seated, the first thermocouple 1 is switched to a free state, one end, extending out of the combustor, of the first thermocouple 1 extends out for a certain length under the action of elastic force compared with the end in a compressed state, so that the detection end of the first thermocouple 1 is baked by flame, the temperature rises rapidly and reaches flameout temperature, the electromagnetic valve 3 is closed, and the gas stove is flameout rapidly.
Preferably, in this embodiment, the elastic member is a spring.
Example two
As shown in fig. 3, the present embodiment is different from the first embodiment in that a second voltmeter 10 is connected in parallel to both ends of the solenoid valve 3 and is used for detecting the sum of the difference between the thermoelectric potentials generated by the second thermocouple 2 and the first thermocouple 1 and the output voltage of the power source 4, that is, the voltage value received by the solenoid valve 3.
EXAMPLE III
The embodiment of the invention discloses a safety protection method for a kitchen range, which comprises the following steps:
in the first step, the difference U between the thermoelectric forces generated by the second thermocouple 2 and the first thermocouple 1 is obtained 1 And the output voltage U of the power supply 4 2 ；
Second, judge U 1 +U 2 Whether the opening critical voltage U of the electromagnetic valve 3 is reached;
third, in U 1 +U 2 When the current value is less than the set value U, the electromagnetic valve 3 is closed to control the stove to extinguish.
Preferably, in this embodiment, the first thermocouple 1 generates a varying first thermoelectric force when heated, the second thermocouple 2 generates a constant second thermoelectric force when heated by the flame ignition heat, and a difference between the second thermoelectric force minus the first thermoelectric force is a difference U between the thermoelectric forces generated by the second thermocouple 2 and the first thermocouple 1 1 ；
The detection unit arranged on the power supply 4 acquires the output voltage U of the power supply 4 2 ；
Detecting the difference U between the thermoelectric potentials generated by the second thermocouple 2 and the first thermocouple 1 1 Plus the output voltage U of the power supply 4 2 Voltage U received by solenoid valve 3 And ；
preferably, a first voltmeter 9 provided on the circuit can directly detect the difference U between the thermoelectric potentials generated by the second thermocouple 2 and the first thermocouple 1 1 。
In this embodiment, when the solenoid valve 3 receives the voltage U And when the electromagnetic force is smaller than the set value U, the electromagnetic acting force borne by the valve core of the electromagnetic valve 3 is smaller than the spring elasticity, so that the valve core generates closing displacement, the electromagnetic valve 3 is closed, and the stove is flamed out;
preferably, when the stove is flamed out, the temperature detected by the first thermocouple 1 is flameout temperature T Flame-out ；
The power supply 4 is a variable voltage power supply capable of adjusting output voltage, and the output voltage U of the power supply 4 2 When the temperature is reduced, the corresponding flameout temperature T of the stove Flame-out Decrease; in thatVoltage U of power supply 4 2 When the temperature is increased, the corresponding flameout temperature T of the stove Flame-out Enlarging;
further preferably, when the cooker is not placed on the cooker, the first thermocouple 1 is rapidly heated to the flameout temperature T by being baked by flame Flame-out The stove can quickly and automatically extinguish.
Example four
The embodiment of the invention discloses a safety protection method for a kitchen range, which comprises the following steps:
in the first step, the difference U between the thermoelectric forces generated by the second thermocouple 2 and the first thermocouple 1 is obtained 1 And the output voltage U of the power supply 4 2 。
Second, judge U 1 +U 2 Whether the opening threshold voltage U of the solenoid valve 3 is reached.
Third, in U 1 +U 2 When the current value is less than the set value U, the electromagnetic valve 3 is closed to control the stove to extinguish.
Preferably, in this embodiment, the first thermocouple 1 generates a variable first thermoelectric voltage when heated, the second thermocouple 2 generates a constant second thermoelectric voltage when heated by the flame ignition heat, and the difference between the second thermoelectric voltage minus the first thermoelectric voltage is the difference U between the thermoelectric voltages generated by the second thermocouple 2 and the first thermocouple 1 1 。
The detection unit arranged on the power supply 4 acquires the output voltage U of the power supply 4 2 。
Detecting the difference U between the thermoelectric potentials generated by the second thermocouple 2 and the first thermocouple 1 1 Plus the output voltage U of the power supply 4 2 Voltage U received by solenoid valve 3 And 。
preferably, as shown in fig. 3, in this embodiment, the two ends of the electromagnetic valve 3 are connected in parallel with a second voltmeter 10, and the second voltmeter 10 can directly detect the input voltage U between the positive electrode and the negative electrode of the electromagnetic valve 3 And (ii) a Namely the U And the difference U between the thermoelectric voltages generated by the second thermocouple 2 and the first thermocouple 1 1 And the output voltage U of the power supply 4 2 And (4) the sum.
In this embodiment, when the solenoid valve 3 receives the voltage U And when the current is less than the set value U, the electromagnetic valve 3The electromagnetic acting force applied to the valve core is smaller than the spring force applied to the valve core, so that the valve core generates closing displacement, the electromagnetic valve 3 is closed, and the stove is flamed out.
Preferably, when the stove is flamed out, the temperature detected by the first thermocouple 1 is flameout temperature T Flame-out 。
The power supply 4 is a variable voltage power supply capable of adjusting output voltage, and the output voltage U of the power supply 4 2 When the temperature is reduced, the corresponding flameout temperature T of the stove Flame-out Decreasing; at a voltage U of the power supply 4 2 When the temperature is increased, the corresponding flameout temperature T of the stove Flame-out And is increased.
EXAMPLE five
The embodiment discloses a stove, it includes the combustor and installs the cooking utensils safety device on its combustor, wherein, the central point that cooking utensils safety device's first thermocouple 1 was installed at the combustor puts, and second thermocouple 2 is arranged in the flame mouth department that closes on the combustor, judges whether flame-out through the temperature difference change of the first thermocouple 1 and the second thermocouple 2 detected position, makes cooking utensils can enough realize preventing dry combustion method function and quick flame-out function.
Moreover, by arranging the variable voltage power supply 4 for the cooker safety protection device, the user can change the flameout temperature preset value of the cooker through adjusting the voltage of the power supply 4 in the using process of the cooker, so that the user can set the flameout temperature according to the food material to be cooked and the cooker to be used, the using effect of the user is enhanced, the application range of the dry burning prevention function is enlarged, and the problem of pot selection of the dry burning prevention function in the prior art is solved.
And the device has the advantages of simple structure, small occupied space, low cost and the like.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A cooktop safety shield, comprising:
the electromagnetic valve (3) is used for controlling the opening and closing of the cooker;
the method is characterized in that:
the first thermocouple (1) is used for sensing the temperature of the bottom of a cooker placed on the cooker;
a second thermocouple (2) for sensing the temperature of the flame generated at the cooking range;
the power supply (4) is a voltage-variable power supply with adjustable voltage;
the electromagnetic valve (3), the first thermocouple (1), the second thermocouple (2) and the power supply (4) are sequentially connected to form a loop, and the difference of thermoelectric potentials generated by the second thermocouple (2) and the first thermocouple (1) and the power supply (4) jointly provide starting voltage for the electromagnetic valve (3).
2. The cooktop safety shield of claim 1, wherein: the negative poles of the first thermocouple (1) and the second thermocouple (2) are connected with each other, the positive pole of the first thermocouple (1) and the positive pole of the second thermocouple (2) are respectively connected with the positive pole and the negative pole of the power supply (4) to form a loop, and the electromagnetic valve (3) is connected in series in the loop;
preferably, the electromagnetic valve (3) is connected to a loop between the positive pole of the power supply (4) and the positive pole of the first thermocouple (1).
3. The hob safety protection device according to claim 1 or 2, characterized in that: a first voltmeter (9) is connected in parallel at the positive pole of the first thermocouple (1) and the positive pole of the second thermocouple (2) and is used for detecting the difference between thermoelectric potentials generated by the second thermocouple (2) and the first thermocouple (1);
or the two ends of the electromagnetic valve (3) are connected with a second voltmeter (10) in parallel and used for detecting the voltage of the two ends of the electromagnetic valve (3).
4. The hob safety protection device according to claim 1 or 2, characterized in that: the first thermocouple (1) and the second thermocouple (2) are both arranged on a burner of the stove;
preferably, the first thermocouple (1) is arranged at the center of the burner, one end of the first thermocouple extends upwards out of the burner, and the second thermocouple (2) is arranged at a flame port adjacent to the burner.
5. The cooktop safety shield of claim 4, wherein: the first thermocouple (1) is mounted on the combustor in a manner of being capable of stretching up and down through an elastic piece.
6. The hob safety protection device according to claim 1 or 2, characterized in that: the power supply (4) is provided with a detection unit for detecting the output voltage of the power supply.
7. A method for the safety protection of a cooking appliance equipped with a safety protection device of the cooking appliance according to any one of the claims 1 to 6, characterized in that:
acquiring the difference U between thermoelectric potentials generated by the second thermocouple (2) and the first thermocouple (1) 1 With the voltage U of the power supply (4) 2 ；
Judge U 1 +U 2 Whether the opening critical voltage U of the electromagnetic valve (3) is reached or not;
at U 1 +U 2 When the current value is less than the set value U, the electromagnetic valve (3) is closed to control the stove to extinguish.
8. The cooking utensils safety protection method of claim 7, characterized in that:
the first thermocouple (1) generates a variable first thermoelectric force when heated, the second thermocouple (2) generates a constant second thermoelectric force when heated by flame ignition heat, and the difference of the second thermoelectric force minus the first thermoelectric force is the difference U between the thermoelectric forces generated by the second thermocouple (2) and the first thermocouple (1) 1 ；
The detection unit arranged on the power supply (4) acquires the output voltage U of the power supply (4) 2 ；
Detect the derived secondThe difference U between the thermoelectric potentials generated by the two thermocouples (2) and the first thermocouple (1) 1 Plus the output voltage U of the power supply (4) 2 Voltage U received by the solenoid valve (3) And ；
preferably, a first voltmeter (9) arranged on the loop can directly detect the difference U between the thermoelectric potentials generated by the second thermocouple (2) and the first thermocouple (1) 1 。
9. The cooking utensils safety protection method of claim 7, characterized in that: a second voltmeter (10) arranged on the loop can directly detect the input voltage U between the anode and the cathode of the electromagnetic valve (3) And ；
the U is And the difference U between the thermoelectric voltages generated by the second thermocouple (2) and the first thermocouple (1) 1 Voltage U with power source (4) 2 And (4) the sum.
10. The cooking utensils safety protection method of any one of claims 7 to 9, characterized in that: when the electromagnetic valve (3) receives the voltage U And when the electromagnetic force is smaller than the set value U, the electromagnetic acting force borne by the valve core of the electromagnetic valve (3) is smaller than the spring elasticity, so that the valve core generates closing displacement, the electromagnetic valve (3) is closed, and the stove is flamed out;
preferably, when the stove is flamed out, the temperature detected by the first thermocouple (1) is flamed out temperature T Flame-out ；
The power supply (4) is a variable voltage power supply capable of adjusting output voltage, and the output voltage U of the power supply (4) 2 When the temperature is reduced, the corresponding flameout temperature T of the stove Flame-out Decreasing; at the voltage U of the power supply (4) 2 When the temperature is increased, the corresponding flameout temperature T of the stove Flame-out Increasing;
further preferably, when the cooker is not placed on the cooker, the first thermocouple (1) is rapidly heated to the flameout temperature T by flame baking Flame-out The stove can quickly and automatically extinguish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829416.4A CN115682047A (en) | 2021-07-22 | 2021-07-22 | Safety protection device and method for kitchen range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829416.4A CN115682047A (en) | 2021-07-22 | 2021-07-22 | Safety protection device and method for kitchen range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115682047A true CN115682047A (en) | 2023-02-03 |
Family
ID=85044388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110829416.4A Pending CN115682047A (en) | 2021-07-22 | 2021-07-22 | Safety protection device and method for kitchen range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115682047A (en) |
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2021
- 2021-07-22 CN CN202110829416.4A patent/CN115682047A/en active Pending
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