CN209960552U - Automatic closing device for dry combustion of gas stove - Google Patents
Automatic closing device for dry combustion of gas stove Download PDFInfo
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- CN209960552U CN209960552U CN201920478284.3U CN201920478284U CN209960552U CN 209960552 U CN209960552 U CN 209960552U CN 201920478284 U CN201920478284 U CN 201920478284U CN 209960552 U CN209960552 U CN 209960552U
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Abstract
The utility model discloses a gas-cooker does away with fire self-closing device futilely is provided with the kitchen pot on the gas-cooker, and the gas-cooker has connected gradually gas hose and gas pipeline, the gas hose with be connected with between the gas pipeline and control the explosion-proof solenoid valve that the gas was carried through the switching or open, gas-cooker does away with fire self-closing device and contains: the thermal infrared temperature measuring sensor is aligned to the cooker, receives temperature infrared rays radiated by the cooker and collects a temperature signal of the cooker; and the control circuit is respectively connected with the thermal infrared temperature measuring sensor and the explosion-proof electromagnetic valve, receives the temperature signal collected by the thermal infrared temperature measuring sensor, correspondingly outputs current to the explosion-proof electromagnetic valve when the temperature signal reaches a set pot body dry-out temperature value, and the explosion-proof electromagnetic valve is electrified and closed to cut off gas. The utility model discloses can guarantee kitchen gas safety, adapt to various material cooking utensils, adaptation crowd wide range, easy operation, installation are simple, the cost is low, the good reliability.
Description
Technical Field
The utility model relates to a family's electrical control field, in particular to gas-cooker dry combustion method self-closing device.
Background
The gas stove is a life tool necessary for family life, and particularly, the gas stove cannot be opened in urban life. The existing common gas stoves are divided into coal gas, natural gas, liquefied gas and the like, and have the advantages of small pollution, small volume, high utilization efficiency of combustion heat, convenient use and almost no noise; however, the existing gas cookers have a common problem which is basically not solved perfectly, namely the safety and intelligence degree is not high.
In daily life, old people have poor memorability, young people enjoy playing and middle-aged people have more troubles, and the gas stove which is cooking east and west in a kitchen is easy to be ignored for strict supervision, so that water on a pot on the gas stove is often burnt, and particularly, the pot of the stove is burnt dry and dense smoke is also common due to high heat value of the currently commonly used natural gas. The pot is burnt out or is small, particularly the meat products being cooked, the fat content of the meat products is high, once the water is dried, the oil fat is ignited, and a fire is further caused, and the fire in the case of the fire is also incomparable everyday!
In order to prevent kitchen fire, the pan on the gas stove is firstly prevented from being dried, and particularly oil exists in the pan of the kitchen when dishes are cooked, so that the fire disaster is accelerated. However, in the existing gas stove technology, the technology of preventing flameout and closing gas is mature, and the technology of closing gas by dry burning is very rare. Looking at the prior art documents in the patent libraries of China, those skilled in the art think that the actual implementation of the method becomes a popular product and has a plurality of difficulties.
Many existing technologies are often theoretically possible, but becoming well known products requires considerations of practicality, implementation and manufacturing costs, adaptation to the population, etc. Therefore, the prior art can really become a mature product easy to popularize after comprehensive consideration. Based on the above, it is necessary to develop a gas stove dry burning automatic closing device for preventing fire.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a gas stove dry burning automatic closing device, which accurately detects the temperature of a pot body by a contactless remote sensor and then drives a set of combination device of an explosion-proof gas electromagnetic valve by an acquired temperature signal through a controller; the utility model discloses can cut off the gas rapidly, make the gas-cooker flame out, the chime of doom is sounded simultaneously, when the kitchen nobody, also can avoid dangerous emergence.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a gas-cooker dry combustion method self-closing device, be provided with the kitchen pot on the gas-cooker, the gas-cooker has connected gradually gas hose and gas pipeline, the gas hose with be connected with between the gas pipeline and control the explosion-proof solenoid valve that the gas was carried through the switching or open, gas-cooker dry combustion method self-closing device contains:
the thermal infrared temperature measuring sensor is aligned to the cooker, receives the temperature infrared rays radiated by the cooker and collects the temperature signal of the cooker;
and the control circuit is respectively connected with the thermal infrared temperature measuring sensor and the explosion-proof electromagnetic valve, receives the temperature signal acquired by the thermal infrared temperature measuring sensor, correspondingly outputs current to the explosion-proof electromagnetic valve when the temperature signal reaches a set pot body dry-out temperature value, and switches on and off the explosion-proof electromagnetic valve to cut off gas.
Preferably, the control circuit comprises:
the isolation diode inputs the temperature signal output by the signal output end of the thermal infrared temperature measurement sensor;
the positive input end of the comparator IC receives the temperature signal output by the isolating diode, and a first power pin and a second power pin of the comparator IC are respectively connected with the grounding end and the power end of the thermal infrared temperature measuring sensor; when the temperature signal output by the isolation diode reaches a trigger threshold value which enables the positive input end of the comparator IC to be unbalanced, the output end of the comparator IC is converted from a low potential to a high potential, wherein the set value of the pan body drying temperature is consistent with the trigger threshold value;
a first current limiting resistor to which a high potential voltage signal of an output terminal of the comparator IC is input;
a base electrode of the driving triode receives the high potential voltage signal output by the first current limiting resistor, the driving triode is conducted, the high potential voltage signal passes through a collector electrode to an emitter electrode of the driving triode and is output to a relay, the relay starts to work, and the relay comprises a first normally open contact which is attracted and conducted when the relay works;
the unidirectional silicon controlled rectifier is connected with the explosion-proof electromagnetic valve in series and then connected with the electric energy storage capacitor in parallel; when the first normally open contact is switched on, the high potential voltage signal reaches the trigger electrode of the one-way silicon controlled rectifier through the second current limiting resistor, the one-way silicon controlled rectifier is triggered and switched on, the stored electric energy of the electric energy storage capacitor is released, the current passes through the + end of the one-way silicon controlled rectifier from the + end of the electric energy storage capacitor and reaches the explosion-proof electromagnetic valve connected with the-end of the one-way silicon controlled rectifier, and the explosion-proof electromagnetic valve is switched on and off.
Preferably, the relay comprises a second normally open contact, an alarm is arranged between the second normally open contact and the power end of the thermal infrared temperature measuring sensor, the second normally open contact is in attraction and conduction when the relay works, and at the moment, the alarm gives an alarm sound.
Preferably, the control circuit is provided with a balancing circuit for adjusting the trigger threshold, the balancing circuit comprises a first resistor, a second resistor, a third resistor and a potentiometer, a first branch formed by the mutual series connection of the first resistor and the potentiometer is respectively connected to a power supply end and a ground end of the thermal infrared temperature measuring sensor, and a second branch formed by the mutual series connection of the second resistor and the third resistor is connected in parallel with the first branch;
the negative input end of the comparator IC is connected with the first end of the second resistor, the second end of the second resistor is connected with the power supply end of the thermal infrared temperature measurement sensor, the positive input end of the comparator IC is connected with the first end of the potentiometer, and the second end of the potentiometer is connected with the grounding end of the thermal infrared temperature measurement sensor.
Preferably, the resistances of the first resistor, the second resistor and the third resistor are all 10k Ω, the total resistance of the potentiometer is 20k Ω, and the adjustment range of the potentiometer is 5-15k Ω.
Preferably, a fourth resistor and a second diode for current limiting and unidirectional isolation of the charging of the electric energy storage capacitor are connected in series between a power supply end of the thermal infrared temperature measurement sensor and a + end of the unidirectional silicon controlled rectifier.
Preferably, the control circuit further comprises:
the seventh resistor and the first indicator light are matched with each other to indicate the charging state of the electric energy storage capacitor, and a branch formed by connecting the seventh resistor and the first indicator light in series is connected with the electric energy storage capacitor in parallel; and/or an eighth resistor and a second indicator light which are matched with each other to form a power supply of the control circuit and are in a working state, wherein two ends of a branch formed by connecting the eighth resistor and the second indicator light in series are respectively connected with a power supply end and a grounding end of the thermal infrared temperature measuring sensor.
Preferably, a power supply end and a ground end of the thermal infrared temperature sensor are respectively connected with a + end and a-end of an output end of the rectification and voltage stabilization module, and the rectification and voltage stabilization module is supplied with voltage from a low-voltage side of a double-loop safety isolation transformer.
Preferably, the thermal infrared temperature measuring sensor is placed on a movable temperature measuring sensor support, the temperature measuring sensor support is arranged on a support base with magnetism, and the support base is placed on the gas stove; the thermal infrared temperature measuring sensor is connected with a knob which is aligned to the cooker through adjusting the angle of the thermal infrared temperature measuring sensor.
Preferably, the explosion-proof electromagnetic valve is provided with a manual opening button.
Compared with the prior art, the beneficial effects of the utility model are that: (1) the utility model accurately detects the temperature of the pot body through the non-contact remote sensor, drives the explosion-proof electromagnetic valve to close through the control circuit according to the collected temperature signal, cuts off the gas if the explosion-proof electromagnetic valve is broken, and immediately sends out the alarm sound, thereby ensuring the safety of the kitchen gas; (2) the utility model can adapt to various cooking utensils made of materials, and has the advantages of wide range of people, simple operation, simple installation, low cost and strong reliability; (3) the utility model discloses a design can also be applied to other fields, like the temperature control of pharmaceutical chemical industry laboratory, smelting temperature control, various hot reacting furnace etc. has market spreading value.
Drawings
FIG. 1 is a specific embodiment of the automatic closing device for dry combustion of a gas range of the present invention;
fig. 2 is a control circuit diagram of the automatic closing device for dry combustion of the gas stove of the present invention.
Detailed Description
The features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of the non-limiting embodiments made with reference to fig. 1-2. Referring to fig. 1-2, which illustrate embodiments of the present invention, the present invention will be described in more detail below. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Fig. 1 shows a specific embodiment of the automatic closing device for dry combustion of gas cooker of the present invention, which comprises a thermal infrared temperature sensor 06 (same as LT mark in fig. 2), a controller box 08 and an explosion-proof solenoid valve 13 (same as FA mark in fig. 2) dedicated to gas combustion.
The thermal infrared temperature sensor 06 is placed on a movable temperature sensor holder 05, the temperature sensor holder 05 is arranged on a magnetic holder base 16, the holder base 16 is placed on a gas range 01, and the gas range 01 is used for placing a range pan 03 (numeral 02 in fig. 1 is a flame during combustion).
The thermal infrared temperature measurement sensor 06 is connected with a control circuit in the controller box 08 through a lead 07, the controller box 08 is connected with an explosion-proof electromagnetic valve 13 special for gas through a line 09, the control circuit of the controller box 08 is used for cutting off the gas by closing the explosion-proof electromagnetic valve 13 when the oven pot is dried, the explosion-proof electromagnetic valve 13 is connected between a gas pipeline 12 and a gas hose 14, the gas hose 14 is connected with the gas stove 01, and the explosion-proof electromagnetic valve 13 special for gas is provided with a manual opening button 10 for manually opening the explosion-proof electromagnetic valve 13. Meanwhile, the gas pipeline 12 is connected with a gas main switch 11 for controlling the gas supply process and realizing the control process of delivering gas to the gas stove 01.
Preferably, the explosion-proof electromagnetic valve 13 is a model PMC-15A-DN15, and is a domestic gas safety special valve.
Preferably, the thermal infrared temperature sensor 06 can adopt a domestic LT-05A series thermal infrared temperature sensor LT (non-contact industrial grade) for reliably detecting the temperature change of the outer surface of the cooking pot, and has the characteristics of accurate detection data and high response speed.
When the cooker pot 03 is used, temperature infrared rays 04 can be radiated, the thermal infrared temperature measurement sensor 06 can receive temperature infrared ray signals and convert the temperature infrared ray signals into corresponding electric signals, and further long-distance thermal state image imaging and temperature measurement of the cooker pot are achieved, analysis and judgment are conducted, and therefore the effect of monitoring the surface temperature of the cooker pot is achieved.
In this embodiment, the temperature measuring sensor holder 05 is movable, and the angle of the thermal infrared temperature measuring sensor 06 is adjusted by the knob 15, so that the thermal infrared temperature measuring sensor 06 is aligned with the cooker body of the cooker to smoothly receive the temperature infrared ray 04 radiated from the cooker.
Because the water is contained in the pot which is being boiled and burned on the gas stove, the temperature of the outer surface of the pot body is not more than 100-110 ℃ (which can be obtained according to a plurality of experiments), and the water vapor takes away the heat. When the water in the pot body is evaporated, the temperature of the pot body is rapidly increased, the surface temperature of the pot body can rapidly reach more than 120 ℃, and the surface temperature of the pot body after being dried can rapidly reach more than 300 ℃ when the pot body is burnt to be red. Therefore, the utility model discloses a thermal infrared temperature sensor 06 is used for detecting the apparent temperature of the pot body and distinguishes "wet combustion" and "dry combustion", in case take place dry combustion, just cuts off the gas absolutely at the fruit to send the chimes of doom immediately, thereby guarantee kitchen gas safety.
As shown in fig. 2, the control circuit diagram of the automatic closing device for dry combustion of gas stove of the present invention is placed in the controller box 08 shown in fig. 1, the thermal infrared temperature sensor LT is connected to the control circuit, and the thermal infrared temperature sensor LT is used for detecting the temperature change of the outer surface of the stove pot.
The utility model discloses a control circuit concrete control process as follows:
the a, b and c terminals of the thermal infrared temperature sensor LT are respectively a signal output terminal, a power supply terminal and a ground terminal GND, and a temperature signal (analog value) output by the a terminal of the thermal infrared temperature sensor LT passes through the isolation diode D1 to the 3 pin + input terminal of the IC, wherein the IC in the embodiment is a comparator LM393 (model number). The 4 pin and the 8 pin of the IC are both power supply pins of the IC and are respectively connected with the c end and the b end of the thermal infrared temperature measuring sensor LT; pin 2 of the IC is the-input.
When the temperature signal output of the a end of thermal infrared temperature sensor LT makes IC's 3 feet unbalanced through isolating diode D1's signal value, IC's 1 foot can overturn immediately, truns into high potential (+), + voltage through current-limiting resistance R5 to drive triode BG's base to make drive triode BG switch on immediately, thereby the utility model discloses DC power supply's + voltage makes relay J work through the collecting electrode to the projecting pole of drive triode again. The positive end of the isolation diode D1 is connected with the end a of the thermal infrared temperature sensor LT, the negative end of the isolation diode D1 is connected with the pin 3 of the IC, the pin 1 of the IC is connected with the first end of the current-limiting resistor R5, the second end of the current-limiting resistor R5 is connected with the base electrode of the driving triode BG, the emitting electrode of the driving triode BG is connected with the relay J, the collecting electrode of the driving triode BG is connected with the end b of the thermal infrared temperature sensor, and the relay J is further connected with the end c of the thermal infrared temperature sensor.
JK1 and JK2 are normally open contacts of the relay J, and when the relay J works, the contacts JK1 and JK2 are all attracted and conducted.
When the contact JK1 is conducted, the alarm BJ immediately gives an alarm sound; wherein, the two ends of the alarm BJ are respectively connected with the contact JK1 and the end b of the thermal infrared temperature measurement sensor.
When the contact JK2 is conducted, the + voltage immediately passes through the current limiting resistor R6 to reach the trigger electrode CF of the one-way silicon controlled rectifier SCR, so that the one-way silicon controlled rectifier SCR is triggered and conducted, at the moment, the electric energy storage of the electric energy storage capacitor C2 is instantly released, the current passes through the + end of the one-way silicon controlled rectifier SCR from the + end of the electric energy storage capacitor C2 to reach the special gas explosion-proof electromagnetic valve FA, and the explosion-proof electromagnetic valve FA is electrified to immediately close the explosion-proof electromagnetic valve FA. The anti-explosion electromagnetic valve FA is connected with the unidirectional silicon controlled rectifier SCR in series, one end of the current limiting resistor R6 is connected with the contact JK2, and the other end of the current limiting resistor R6 is connected with the trigger electrode CF of the unidirectional silicon controlled rectifier SCR; one end of an explosion-proof electromagnetic valve FA is connected with the end-end of the one-way silicon controlled rectifier SCR, and the other end of the explosion-proof electromagnetic valve FA is connected with the end-c of the thermal infrared temperature measuring sensor LT.
Meanwhile, a resistor R4 and a diode D2 are sequentially connected in series from the b end of the thermal infrared temperature measurement sensor LT to the + end of the unidirectional silicon controlled rectifier SCR, and the current limiting and unidirectional isolation effects of charging the electric energy storage capacitor C2 are formed.
The utility model discloses in, constitute a balanced circuit by resistance R1, resistance R2, resistance R3, potentiometre RW, be used for changing the trigger threshold value through the resistance numerical value of adjustment potentiometre RW, this trigger threshold value indicates among the control circuit IC's 3 feet unbalance lead to closing the temperature value that the pot body dry combustion method reached when explosion-proof solenoid valve 13, that is to say can adjust controlled temperature.
The first branch formed by mutually connecting the resistor R1 and the potentiometer RW in series is respectively connected to the end b and the end c of the thermal infrared temperature measuring sensor LT, and the second branch formed by mutually connecting the resistor R2 and the resistor R3 in series is connected in parallel with the first branch. The pin 2 of the IC is connected with the first end of a resistor R2, and the second end of a resistor R2 is connected with the b end of a thermal infrared temperature measurement sensor LT; the pin 3 of the IC is connected with the first end of a potentiometer RW, and the second end of the potentiometer RW is connected with the end c of a thermal infrared temperature measurement sensor LT. Preferably, the resistances of the resistor R1, the resistor R2, and the resistor R3 are set to 10k Ω; the total resistance of the potentiometer RW is 20k Ω, and the potentiometer RW is adjusted between 5k Ω and 15k Ω to change the trigger threshold.
Preferably, a diode D3 is further connected in parallel at two ends of the relay J, and the function of releasing the counter potential of the relay coil can be achieved, so that the impact of the counter potential on the driving triode BG is prevented, a protection result is achieved, and the reliability of the whole circuit is ensured.
As shown in fig. 2, a branch formed by connecting the resistor R7 and the indicator light LED1 in series is connected in parallel with the power storage capacitor C2, and the resistor R7 and the indicator light LED1 form an indication of the charging state of the power storage capacitor C2, which is full from dark to light within 1 minute.
Two ends of a branch formed by mutually connecting the resistor R8 and the indicator light LED2 in series are respectively connected with the end b and the end c of the thermal infrared temperature measurement sensor LT, and the resistor R8 and the indicator light LED2 form a power-on working state of the whole control circuit.
Additionally, the utility model discloses a + end and-end that rectification voltage stabilizing module DC output are being connected respectively to thermal infrared temperature sensor LT's b end and c end, and this rectification voltage stabilizing module DC carries out the supply voltage through transformer T, and this transformer T is double-ring formula safety isolation transformer, and rectification voltage stabilizing module DC is supplied with to its low pressure side.
In the working process of the utility model, after the control circuit is connected and the power plug is plugged, the indicator lights LED1 and LED2 are lighted, and the work is started; at the moment, a main gas switch 11 is opened, a manual opening button 10 of an explosion-proof electromagnetic valve 13 special for gas is pulled out, so that the combustible gas smoothly passes through a gas pipeline 12 and a gas hose 14 to reach a gas stove 01, a movable temperature measurement sensor bracket 05 and a bracket base 16 are arranged, the angle of a thermal infrared temperature measurement sensor 06 is adjusted through a button handle 15, and the thermal infrared temperature measurement sensor 06 is aligned with a stove pan 03; after the combustible gas is ignited, the boiler body of the stove starts to be heated and boiled, the temperature starts to rise, and real-time monitoring is started.
When the internal moisture of pot burns out, hot infrared temperature sensor 06 detects pot body temperature when sharply rising to the setting value, and this setting value indicates the 3 unbalanced trigger threshold values of the foot of IC in the triggerable control circuit, and this setting value can adaptively adjust, this moment the utility model discloses a device can start immediately, and corresponding temperature signal can be exported to hot infrared temperature sensor LT's an end, behind foretell control circuit for explosion-proof solenoid valve FA closes, and the alarm sends the chimes of doom simultaneously, thereby the emergence of dangerous accident can be avoided in the field personnel attention of loud suggestion.
After the dangerous dry-burning state of the cooker body is finished, when the gas cooker is reused, the manual opening button 10 of the explosion-proof electromagnetic valve 13 needs to be pulled out again, and then the normal steps are circulated.
According to the actual test result: for example, in dry heating, when the temperature of the pot body rises to a set value (adjustable) of 110 degrees: not more than 1 second kind, the utility model discloses can cut off the gas rapidly, make the gas-cooker flame out, the chime of doom is sounded simultaneously, so when the kitchen nobody, also can avoid dangerous emergence.
To sum up, the utility model is additionally installed on the basis of the original technology of the existing gas stove, and can also be integrated with the new technology of the original technical products. The utility model discloses a lean on contactless remote sensing ware to come the accurate pot body temperature that detects, then the temperature signal who will gather drives one set of composite set of explosion-proof solenoid valve through control circuit. According to the practical application of coming several years, the utility model discloses can adapt to various material cooking utensils, adapt to various crowds wide range, easy operation, installation are simple, the cost is low, the good reliability. The utility model discloses a design can also be applied to other fields, like the temperature control of pharmaceutical chemical industry laboratory, smelting temperature control, various hot reacting furnace etc. has market spreading value.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. The utility model provides a gas-cooker dry combustion method self-closing device, be provided with kitchen pot (03) on the gas-cooker, the gas-cooker has connected gradually gas hose (14) and gas pipeline (12), gas hose (14) with be connected with between gas pipeline (12) through the switching or open explosion-proof solenoid valve (13) that control the gas and carry, its characterized in that, gas-cooker dry combustion method self-closing device contains:
the thermal infrared temperature measuring sensor (06) is aligned to the cooker (03), receives the temperature infrared rays (04) radiated by the cooker (03), and collects the temperature signal of the cooker (03);
and the control circuit is respectively connected with the thermal infrared temperature measuring sensor (06) and the explosion-proof electromagnetic valve (13), receives the temperature signal collected by the thermal infrared temperature measuring sensor (06), correspondingly outputs current to the explosion-proof electromagnetic valve (13) when the temperature signal reaches a set pot body dry-out temperature value, and the explosion-proof electromagnetic valve (13) is electrified and closed to cut off gas.
2. The automatic closing device for dry-burning of gas range as claimed in claim 1,
the control circuit includes:
an isolation diode (D1) for inputting the temperature signal output by the signal output end of the thermal infrared temperature measurement sensor (06);
the positive input end of the comparator IC receives the temperature signal output by the isolating diode (D1), and a first power pin and a second power pin of the comparator IC are respectively connected with the grounding end and the power end of the thermal infrared temperature measuring sensor (06); when the temperature signal output by the isolation diode (D1) reaches a trigger threshold value which enables the positive input end of the comparator IC to be unbalanced, the output end of the comparator IC is changed from low potential to high potential, wherein the pot body dry-out temperature set value is consistent with the trigger threshold value;
a first current limiting resistor (R5) to which a high potential voltage signal at an output terminal of the comparator IC is input;
a base electrode of the driving triode (BG) receives the high-potential voltage signal output by the first current-limiting resistor (R5), the driving triode (BG) is conducted, the high-potential voltage signal passes through a collector electrode to an emitter electrode of the driving triode (BG) and is output to a relay (J), the relay (J) starts to work, and the relay (J) comprises a first normally open contact which is attracted and conducted when the relay (J) works;
the unidirectional Silicon Controlled Rectifier (SCR) is connected with the explosion-proof electromagnetic valve (13) in series and then connected with the electric energy storage capacitor (C2) in parallel; when the first normally open contact is conducted, the high potential voltage signal reaches a trigger electrode of the unidirectional Silicon Controlled Rectifier (SCR) through the second current limiting resistor (R6), the unidirectional Silicon Controlled Rectifier (SCR) is triggered to be conducted, the reserve electric energy of the electric energy reserve capacitor (C2) is released, the current passes through a positive end of the unidirectional Silicon Controlled Rectifier (SCR) from a positive end of the electric energy reserve capacitor (C2) and reaches the explosion-proof electromagnetic valve (13) connected with the positive end of the unidirectional Silicon Controlled Rectifier (SCR), and the explosion-proof electromagnetic valve (13) is powered on and closed.
3. The automatic closing device for dry-burning of gas range as claimed in claim 2,
the relay (J) comprises a second normally open contact, an alarm is arranged between the second normally open contact and the power end of the thermal infrared temperature measuring sensor, the second normally open contact is used for attracting and conducting the relay (J) in work, and at the moment, the alarm gives an alarm sound.
4. The automatic closing device for dry-burning of gas range as claimed in claim 2,
the control circuit is provided with a balancing circuit used for adjusting the trigger threshold, the balancing circuit comprises a first resistor, a second resistor, a third resistor and a potentiometer, a first branch formed by mutually connecting the first resistor and the potentiometer in series is respectively connected to a power supply end and a grounding end of the thermal infrared temperature measuring sensor, and a second branch formed by mutually connecting the second resistor and the third resistor in series is connected with the first branch in parallel;
the negative input end of the comparator IC is connected with the first end of the second resistor, the second end of the second resistor is connected with the power supply end of the thermal infrared temperature measurement sensor, the positive input end of the comparator IC is connected with the first end of the potentiometer, and the second end of the potentiometer is connected with the grounding end of the thermal infrared temperature measurement sensor.
5. The automatic closing device for dry-burning of gas range as claimed in claim 4,
the resistance values of the first resistor, the second resistor and the third resistor are all 10k omega, the total resistance value of the potentiometer is 20k omega, and the adjusting range of the potentiometer is 5-15k omega.
6. The automatic closing device for dry combustion of gas range according to any one of claims 2 to 5,
and a fourth resistor and a second diode which are used for respectively carrying out current limiting and unidirectional isolation on the charging of the electric energy storage capacitor are connected in series between the power supply end of the thermal infrared temperature measuring sensor and the positive end of the unidirectional Silicon Controlled Rectifier (SCR).
7. The automatic closing device for dry combustion of gas range according to any one of claims 2 to 5,
the control circuit further comprises:
the seventh resistor and the first indicator light are matched with each other to indicate the charging state of the electric energy storage capacitor, and a branch formed by connecting the seventh resistor and the first indicator light in series is connected with the electric energy storage capacitor in parallel;
and/or an eighth resistor and a second indicator light which are matched with each other to form a power supply of the control circuit and are in a working state, wherein two ends of a branch formed by connecting the eighth resistor and the second indicator light in series are respectively connected with a power supply end and a grounding end of the thermal infrared temperature measuring sensor.
8. The automatic closing device for dry combustion of gas range according to any one of claims 2 to 5,
the power supply end and the grounding end of the thermal infrared temperature measuring sensor are respectively connected with the positive end and the negative end of the output end of the rectification voltage stabilizing module, and the rectification voltage stabilizing module is supplied with voltage by the low-voltage side of a double-ring safety isolation transformer.
9. The automatic closing device for dry-burning of gas range as claimed in claim 1,
the thermal infrared temperature measurement sensor (06) is placed on a movable temperature measurement sensor support (05), the temperature measurement sensor support (05) is arranged on a magnetic support base (16), and the support base (16) is placed on the gas stove (01);
the thermal infrared temperature measuring sensor (06) is connected with a knob (15) which is aligned to the cooking pot (03) by adjusting the angle of the thermal infrared temperature measuring sensor.
10. The automatic closing device for dry-burning of gas range as claimed in claim 1,
the explosion-proof electromagnetic valve (13) is provided with a manual opening button (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478284.3U CN209960552U (en) | 2019-04-10 | 2019-04-10 | Automatic closing device for dry combustion of gas stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920478284.3U CN209960552U (en) | 2019-04-10 | 2019-04-10 | Automatic closing device for dry combustion of gas stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209960552U true CN209960552U (en) | 2020-01-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920478284.3U Expired - Fee Related CN209960552U (en) | 2019-04-10 | 2019-04-10 | Automatic closing device for dry combustion of gas stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209960552U (en) |
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2019
- 2019-04-10 CN CN201920478284.3U patent/CN209960552U/en not_active Expired - Fee Related
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