CN110594789A - Intelligent stove - Google Patents
Intelligent stove Download PDFInfo
- Publication number
- CN110594789A CN110594789A CN201910971520.XA CN201910971520A CN110594789A CN 110594789 A CN110594789 A CN 110594789A CN 201910971520 A CN201910971520 A CN 201910971520A CN 110594789 A CN110594789 A CN 110594789A
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- Prior art keywords
- stove
- short message
- control circuit
- relay
- food
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- 230000007246 mechanism Effects 0.000 claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003345 natural gas Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 235000013305 food Nutrition 0.000 abstract description 40
- 238000010411 cooking Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 5
- 238000013021 overheating Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 14
- 229910052744 lithium Inorganic materials 0.000 description 14
- 230000006870 function Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000013547 stew Nutrition 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- F24C15/10—Tops, e.g. hot plates; Rings
- F24C15/107—Pan supports or grates therefor
-
- 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
- F24C3/008—Ranges
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
Abstract
An intelligent stove comprises a stove body, a pressure-sensitive device, a rechargeable battery, a charging socket, a power switch, a short message module, an electromagnetic air valve, a pressure sensor mechanism, a control circuit and an alarm circuit; the charging battery, the charging socket, the power switch, the control circuit, the alarm circuit and the short message module are arranged in the element box and are connected with the electromagnetic air valve through a lead, the electromagnetic air valve is arranged between an air inlet pipe and an indoor natural gas pipe of the stove body, and the two pressure sensor mechanisms are respectively arranged in two through holes of the stove body. When the weight of food on any one of the stove plates is reduced too much, the control circuit can automatically turn off the input air source of the stove, the stove automatically stops heating the food, a series of adverse effects caused by overheating of the food are prevented, sound and short message prompt are given to a user at the same time, and the user can timely take corresponding measures, such as timely putting down the cooker from the upper end of the stove and playing a prompt function of good cooking of the food.
Description
Technical Field
The invention relates to the field of intelligent household equipment, in particular to an intelligent stove.
Background
A natural gas stove is an extremely widely used heating appliance. Along with the development of science and technology, the functions of the stove are more and more, and a better and safer guarantee is provided for people to cook food. The existing advanced stove can realize the functions of extinguishing the fire source in cooking, cutting off the gas source and giving an alarm for various reasons, but the functions are not complete. The existing known stoves cannot realize the function of cutting off the gas source when the cooked food is overheated, for example, when people cook food (such as stew) and leave home temporarily or do other things at home, the fire source cannot be turned off in time after the food is cooked, so that the food is overheated and cannot be eaten; in practical situations, if the fire source is not turned off, the food cannot be eaten and the cooking utensil is damaged after a long time, so that the risk of fire and the like is caused. Based on the above, it is necessary to provide a stove capable of automatically turning off the air source when the food is cooked to a certain state.
Disclosure of Invention
In order to overcome the disadvantages of the prior natural gas stove that the side ends of two stove plates of the stove body are both provided with pressure sensor mechanisms, the gravity of the cooker received by the pressure sensor mechanisms is directly transmitted to pressure-sensitive devices at the lower left part and the right part in the stove, before the stove is used, a user adjusts the resistance values of two adjustable resistors of a control circuit according to the needs, when the weight of food on any one stove plate is over reduced (namely when the weight is close to being over heated and the water content of the food is reduced to a certain amount), the control circuit can automatically cut off an input air source of the stove, the stove automatically stops heating the food, a series of adverse consequences caused by over heating of the food are prevented, and simultaneously, the user can give sound and short message prompts, the user can timely take countermeasures (such as timely returning the cooking appliance to the house from the upper end, but also can play a role in prompting that food is cooked).
The technical scheme adopted by the invention for solving the technical problems is as follows:
an intelligent stove comprises a stove body, a pressure-sensitive device, a rechargeable battery, a charging socket, a power switch, a short message module and an electromagnetic air valve, and is characterized by also comprising a pressure sensor mechanism, a control circuit and an alarm circuit; the rechargeable battery, the charging socket, the power switch, the control circuit, the alarm circuit and the short message module are arranged in an element box, and the element box is arranged in the middle of the front lower end of the shell of the stove body; the electromagnetic air valve is arranged between an air inlet pipe of the stove body and an indoor natural gas pipe; the pressure sensor mechanisms are two same and each pressure sensor mechanism comprises a metal guide pipe and a ceramic guide rod, the lower end of each guide rod is provided with a groove, the lower end of each groove is of an open structure, and a heat insulation plate is sleeved in each groove; the upper shell of the stove body is positioned at the side ends of the two stove plates and is respectively provided with a through hole with internal threads, and the two metal guide pipes are respectively arranged in the two through holes; the two guide rods are respectively sleeved in the two guide pipes, the two pressure-sensitive devices are respectively and fixedly installed at the left end and the right end of the lower part in the lower shell of the stove body, and the heat insulation plates at the lower ends of the two guide rods are respectively positioned at the upper ends of the strain gauges of the two pressure-sensitive devices; two ends of the rechargeable battery are respectively connected with the two power input ends of the charging socket, the control circuit and the short message module through leads, two ends of the power output of the control circuit are respectively connected with two ends of the power input ends of the alarm circuit and the electromagnetic gas valve through leads, the signal output end of the control circuit is connected with the signal input end of the short message module through leads, and two ends of the two pressure-sensitive devices are respectively connected with two control signal input ends of the control circuit through leads.
Further, the upper ends of the guide rods of the two pressure sensor mechanisms are higher than the furnace disc support frame of the furnace body.
Further, the pressure sensitive device is a force sensitive resistor.
Furthermore, the short message module is a short message alarm module, and a pin 3 of a trigger signal input end of the short message module is connected with the anode of one diode.
The control circuit comprises an adjustable resistor, a resistor, NPN triodes and a relay, wherein the adjustable resistor, the NPN triodes and the relay are connected through a circuit board in a wiring mode, one end of a first adjustable resistor and one end of a second adjustable resistor are connected with one end of the first resistor and one end of the second resistor, the positive power input end of the first relay and the positive power input end of the second relay, and the control power input end of the first relay and the second relay are connected, one end of the first resistor is connected with a collector of the first NPN triode and a base of the second NPN triode, a collector of the second NPN triode is connected with a negative power input end of the first relay, one end of the second resistor is connected with a collector of the third NPN triode and a base of the fourth NPN triode, a collector of the fourth NPN triode is connected with a negative.
Further, the alarm circuit is a source-only continuous acoustic alarm finished product.
Furthermore, the valve core in the electromagnetic air valve is of a normally open structure.
The invention has the beneficial effects that: the invention installs a set of pressure sensor mechanism at the front side end of two stove plates of the stove body, the lower part of the flat-bottom cooker (the invention is mainly used for the flat-bottom cooker) presses the upper end of the guide rod of the pressure sensor mechanism at ordinary times, the weight of the food in the pot is large, then the resistance value of the pressure sensitive device at the lower end is reduced under the action of gravity, the weight of the food in the pot is light, and then the resistance value of the pressure sensitive device at the lower end is increased under the action of gravity; before the invention is used, a user adjusts the resistance values of the two adjustable resistors of the control circuit as required, when the weight of food on any one stove plate is reduced too much (namely when the food is heated and the water content of the food is reduced to a certain amount), the control circuit can automatically turn off the electromagnetic air valve so as to turn off the input air source of the stove, and the stove stops heating the food automatically, thereby preventing a series of adverse consequences caused by overheating the food; and can give the user the sound suggestion at the same time, notify the user nearby at home, can also be through the short message module short message suggestion user outside the family, in this way, the user can take the responsive measure in time (for example catch up to home in time with the cooking utensil from the stove top end down, can also play the good prompt facility of food cooking). Based on the above, the invention has good application prospect.
Drawings
The invention is further illustrated below with reference to the figures and examples.
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a circuit diagram of the present invention.
Detailed Description
As shown in fig. 1, an intelligent stove includes a stove body 1, a pressure sensitive device 2, a rechargeable battery 3, a rechargeable socket 4, a power switch 5, a short message module 6, an electromagnetic gas valve 7, a pressure sensor mechanism 8, a control circuit 9, and an alarm circuit 10; the rechargeable battery 3, the charging socket 4, the power switch 5, the control circuit 9, the alarm circuit 10 and the short message module 6 are arranged on a circuit board, the circuit board is arranged in an element box 11, and the lower ends of the periphery of the element box 11 are arranged in the middle of the front lower end of the shell of the stove body 1 through screw nuts; the electromagnetic air valve 7 is arranged between an air inlet pipe of the stove body 1 and an indoor natural gas pipe through a pipeline and a pipeline joint; the pressure sensor mechanisms 8 are two same and each comprises a metal guide pipe 81 and a ceramic guide rod 82, the lower end of each guide rod is provided with an annular groove 83, the lower end of each annular groove 83 is of an open structure, and an annular heat-insulating hard aluminum silicate ceramic fiber plate 84 is sleeved in each annular groove 83; the upper shell of the stove body 1 is provided with through holes 101 which are distributed with internal threads from top to bottom at the front side ends of the two stove plates (the glass panel of the upper shell is provided with two holes which are aligned with the through holes 101 respectively), the external threads on the outer sides of the two guide pipes 81 are screwed into the internal threads of the two through holes 101 respectively, and the two metal guide pipes 81 are respectively arranged at the front parts of the stove plates at the left and right ends of the stove body 1; the two guide rods 82 are respectively sleeved in the two guide pipes 81 from bottom to top (the outer diameter of the two guide rods 82 is less than the inner diameter of the two guide pipes 81 by 0.5mm), the left end and the right end of the lower part in the lower shell of the stove body 1 are respectively adhered with two circular plastic sheets 102 by glue, the lower ends of the two pressure sensitive devices 2 are respectively adhered on the two plastic sheets 102 by glue, the upper side strain gauges of the two pressure sensitive devices 2 are respectively adhered with a rubber sheet 103 by glue, and the heat insulation plates 84 at the lower ends of the two guide rods are just respectively positioned at the upper ends of the two rubber sheets 103 of the strain gauges of the two. The height of the upper ends of the guide rods 81 of the two pressure sensor mechanisms is slightly higher than (3mm) the height of the furnace disc support frame 104 of the furnace body.
As shown in fig. 2, the pressure-sensitive devices RT1 and RT2 are force-sensitive resistors, the rechargeable battery G is a 6V/5Ah lithium rechargeable battery, the charging socket CZ is a coaxial power charging socket, the power switch K is a toggle power switch, and the operating handle of the power switch K and the jack of the charging socket CZ are respectively located outside two openings in the front middle of the lower housing of the stove body 1 and the element case 11 (the rechargeable battery G can be charged by inserting a charging plug of an external 6V power charger into the charging socket CZ when the rechargeable battery G is out of power) and the lower housing of the stove body 1. The short message module A1 is a finished product of a short message alarm module of a GSM DTU SIM800C of a brand Robotsky model, a mobile phone card is arranged in the short message module A1, the short message module A1 is provided with two power supply input ends 1 and 2 pins, eight signal input ends 3-10 pins, after each signal input end inputs a low level signal, the short message module A1 sends a short message through a wireless mobile network respectively, (in the embodiment, a manager edits a short message in advance through the function of the short message module, the content is 'food will be burned out'), after the signal input end 3 pins are triggered, the short message module A1 sends the short message, the short message can be sent to three telephone numbers at most simultaneously, and the trigger signal input end 3 pins of the short message module are connected with the anode of a diode VD. The control circuit comprises adjustable resistors RP and RP1, resistors R1 and R2, an NPN triode Q1, Q2, Q3 and Q4 and a relay J, J1, and the resistors RP and RP1, the resistors R1 and the R2 are connected through circuit board wiring; one end of the first adjustable resistor RP and one end of the second adjustable resistor RP1 are connected with one end of the first resistor R1 and one end of the second resistor R2, the positive power supply input ends of the first relay J and the second relay J1, and the control power supply input ends of the first relay J and the second relay J1, one end of a first resistor R1 is connected with a collector of a first NPN triode Q1 and a base of a second NPN triode Q2, a collector of the second NPN triode Q2 is connected with a negative power input end of a first relay J, one end of a second resistor R2 is connected with a collector of a third NPN triode Q3 and a base of a fourth NPN triode Q4, a collector of the fourth NPN triode Q4 is connected with a negative power input end of a second relay J1, and emitters of the four NPN triodes Q1, Q2, Q3 and Q4 are grounded (adjusting knobs of two adjustable resistors RP and RP1 are respectively positioned outside two holes at the front left part and the right part of a lower end shell of the stove body 1). The alarm circuit is a source-only continuous sound alarm finished product B. The electromagnetic air valve DC is an electromagnetic air valve (2W) with a normal open type structure of an internal valve core and with a direct working voltage of 6V.
As shown in fig. 2, both ends of the rechargeable battery G and both ends of the charging socket CZ are connected via wires, respectively. The positive pole of the rechargeable battery G is connected with one end of the power switch K through a lead. The other end of the power switch K, the negative electrode of the rechargeable battery G, one end of a resistor R1 at the two power input ends of the control circuit, the emitter of the NPN triode Q1 and the two power input ends VCC and GND (pins 1 and 2) of the short message module A1 are respectively connected through leads. The normally open contact end of the relay J, JI at the two ends of the control circuit power output, the emitting electrode of the NPN triode Q1 and the two ends of the alarm circuit buzzer B power input, and the two ends of the power input of the electromagnetic air valve DC are respectively connected through leads. The signal output ends of the control circuit are NPN triodes Q2 and Q4, the collector electrodes of the NPN triodes Q2 and Q4 are connected with the pin 3 of the signal input end of the short message module A1 through leads (actually, the pins are connected with the cathode of a diode VD). Two ends of the pressure-sensitive device RT1 are respectively connected with the other end of the adjustable resistor RP at the first path of control signal input end of the control circuit and the base of the NPN triode Q1 through leads. Two ends of the pressure-sensitive device RT2 are respectively connected with the other end of the adjustable resistor RP1 at the second path of control signal input end of the control circuit and the base electrode of the NPN triode Q3 through leads.
As shown in fig. 1 and 2, after the power switch K is turned on before use, the power output by the lithium storage battery G enters the control circuit and the two ends of the power input of the short message module a1, so that the control circuit and the short message module a1 are in a power-on working state. The positive electrode of the power supply output by the lithium storage battery G is respectively subjected to voltage reduction and current limitation by adjustable resistors RP and RP1 and then respectively enters the base electrodes of NPM triodes Q1 and Q3 through voltage-sensitive devices RT1 and RT 2. According to the invention, a set of pressure sensor mechanism 8 is arranged at the front side ends of the two plates of the stove body, and after the lower parts of two or one flat-bottom cooker (mainly used for the flat-bottom cooker) are placed on two or one plate supporting frame 104 of the stove body 1 at ordinary times, the lower ends of the two or one flat-bottom cooker can respectively press the upper ends of the guide rods 82 of the pressure sensor mechanisms; thus, the weight of two or one flat-bottom cookware will act on the guide rods 82 of two or one set of pressure sensor mechanism 8, the guide rods 82 will go down along the guide tubes 81, the lower heat insulation plate 84 will press on the upper ends of the two rubber sheets 103 of the two pressure sensitive devices 2 strain gauges respectively (because the two metal guide tubes 81 are respectively installed on the upper shell of the stove body 1 and located at the front side ends of the two stove plates, so the fire source generated by the stove plate of the stove body 1 will act on the metal guide tubes 81 less, and because the guide rods 82 are made of ceramic material and the lower part of the guide rods 82 is provided with the heat insulation plate 84, the heat acting on the upper ends of the two rubber sheets 103 of the two pressure sensitive devices 2 strain gauges will be extremely small and will not affect the normal use of the two pressure sensitive devices 2), the larger the smaller the resistance value of the two or one pressure sensitive devices RT1, RT2, the smaller the weight, the, The greater the resistance value of RT 2. When the user of the invention uses the invention, if the function of the invention is not used, as long as the power switch K is not turned on, the internal valve core of the electromagnetic valve DC is in a normally open structure, the natural gas can not be prevented from entering the stove plate of the stove body 1, and the normal use of the stove body 1 can not be affected.
As shown in fig. 1 and 2, the lower parts of the two flat bottom cookers of the present invention are placed on the two pan supports 104 of the oven body 1, and after the power switch K is turned on, only a small amount of water (as the minimum amount of water to be subsequently dried) is initially filled in the cookers. Then the resistance values of two adjustable resistors RP, RP1 are adjusted slowly, so that the water quantity in the cooker is small and the weight is light, the weight on the upper ends of two pressure sensitive devices RT1, RT2 strain gauges (rubber sheet 103 plays a buffer role) is light, the voltage on the base electrodes of NPN triodes Q1, Q3 is low when the other ends of two pressure sensitive devices RT1, RT2 (resistance is large) are input to the base electrodes of NPN triodes Q1, Q3, the voltage of the positive electrode of the power supply is lower than 0.7V after the adjustable resistors RP, RP1 and two pressure sensitive devices RT1, RT2 are used for voltage reduction and current limitation, and the NPN triodes Q1, Q3 are cut off. In the specific operation, a user firstly and slowly adjusts the adjusting knob of the adjustable resistor RP rightwards, because the upper end of the strain gage of the pressure sensitive device RT1 is relatively light, the voltage of the positive power supply of the lithium storage battery G which is input to the base of the NPN triode Q1 through the adjustable resistor RP and the pressure sensitive device RT1 is relatively low (the strain gage of the pressure sensitive device RT1 is light in stress, large in resistance and relatively low in output end voltage), the voltage of the power supply which is input to the base of the NPN triode Q1 after being reduced and limited by the adjustable resistor RP and the pressure sensitive device RT1 is lower than 0.7V, therefore, the NPN triode Q1 is cut off, the collector of the NPN triode Q1 has no output, the base of the NPN triode Q2 is subjected to voltage reduction and current limiting through the resistor R1, the proper forward bias voltage is obtained, the collector of the battery is conducted, the output low level enters the input end of the power supply of the negative electrode of the relay J, and then the input end of the control power supply of the relay J is in a pull-in and power-on state and is communicated with the normally open contact end; because the normally open contact end of the relay J is connected with the positive power input ends of the electromagnetic air valve DC and the buzzer B, the negative power input ends of the electromagnetic air valve DC and the buzzer B are connected with the negative electrode of the lithium storage battery G, and the control of the relay J and the positive power input end of the relay J are connected with the positive electrode of the lithium storage battery G, at this moment, the electromagnetic air valve DC can be used by electricians to close the internal valve core of the buzzer B, the buzzer B can sound electrically to prompt a user, the preset weight of a cooker on a left-end stove plate is required (the weight of the cooker on the left-end stove plate is preset by adjusting the adjustable resistor RP), the user can stop adjusting the adjustable resistor RP just after hearing the sounding of the buzzer B, and in the subsequent practical use, when food in the cooker on the left-end stove plate is overheated and the water amount is reduced to a set minimum amount, the buzzer B; when the food in the cooker on the left end oven plate is reduced to the lowest limit weight by overheated water and set, namely the buzzer B and the electromagnetic air valve DC are electrified to work, a user adds water required by stewing food into the cooker on the left end oven plate and covers the cooker cover, at the moment, as the weight of the cooker is increased, the weight of the upper end of a strain gauge of a pressure sensitive device RT1 is relatively increased and the resistance value is reduced, the voltage input to the base of an NPN triode Q1 from the other end of a pressure sensitive device RT1 is relatively high, the voltage of the positive electrode of the power supply is higher than 0.7V after the voltage is reduced and limited by an adjustable resistor RP and a pressure sensitive device RT1, so that the NPN triode Q1 conducts the low level of the output collector to enter the base of a triode Q2, the base of the NPN triode Q2 has no proper forward bias voltage and is in a cut-off state, the collector of the NPN triode Q35, and then the buzzer B and the electromagnetic gas valve DC are both de-energized and do not work any more, and the left end furnace plate can enter a normal use program. In the specific operation, the user slowly adjusts the adjusting knob of the adjustable resistor RP1 to the right, because the upper end of the strain gauge of the voltage-sensitive device RT2 is relatively light, the voltage of the positive power supply of the lithium storage battery G which is input to the base electrode of the NPN triode Q3 through the adjustable resistor RP1 and the voltage-sensitive device RT2 is relatively low (the strain gauge of the voltage-sensitive device RT2 is light in stress, large in resistance and relatively low in output end voltage), the voltage of the power supply which is input to the base electrode of the NPN triode Q3 after being reduced and limited by the adjustable resistor RP1 and the voltage-sensitive device RT2 is lower than 0.7V, therefore, the NPN triode Q3 is cut off, the collector of the NPN triode Q3 has no output, the base of the NPN triode Q4 is subjected to voltage reduction and current limiting through the resistor R2, proper forward bias voltage is obtained from the positive electrode of the lithium storage battery G and is conducted, the collector of the NPN triode Q4 outputs low level and enters the negative power supply input end of the relay J1, and then the relay J1 is in an electrified attraction state, and the control power supply input end of the relay J1 is communicated with the normally; because the normally open contact end of the relay J1 is connected with the positive power input ends of the electromagnetic air valve DC and the buzzer B, the negative power input ends of the electromagnetic air valve DC and the buzzer B are connected with the negative electrode of the lithium storage battery G, and the control and positive power input ends of the relay J1 are connected with the positive electrode of the lithium storage battery G, at this moment, the electromagnetic air valve DC can be used by an electrician to close the internal valve core of the electromagnetic air valve DC, the buzzer B can sound electrically to prompt a user, the preset weight of a cooker on a right-end stove plate reaches the requirement (the weight of the cooker on the right-end stove plate is preset by adjusting the adjustable resistor RP 1), the user stops adjusting the adjustable resistor RP1 after hearing the sounding of the buzzer B, and in the subsequent practical use, when food in the cooker on the stove plate is overheated and the water amount is reduced to the set minimum amount, the buzzer B and the electromagnetic; when the food in the cooker on the right oven plate is reduced to the lowest limit weight by overheated water, namely the buzzer B and the electromagnetic air valve DC are electrified to work, a user adds water required by stewing food into the cooker on the right oven plate and covers the cooker cover, at the moment, because the weight of the cooker is increased, the weight of the upper end of a strain gauge of a pressure sensitive device RT2 is relatively increased, the resistance value is reduced, the voltage input to the base of an NPN triode Q3 from the other end of a pressure sensitive device RT2 is relatively high, the voltage is reduced and limited by an adjustable resistor RP1 and a pressure sensitive device RT2, the voltage of the positive electrode of the power supply is higher than 0.7V, so that the NPN triode Q3 conducts the low level of the output collector to enter the base of a triode Q4, the base of the NPN triode Q4 has no proper forward bias voltage and is in a cut-off state, the collector of the NPN triode Q8664 has no output, and then the buzzer B and the electromagnetic gas valve DC are both de-energized and do not work any more, and the furnace plate at the right end can enter a normal use program.
As shown in fig. 2, in actual use, when the food in the cooker on the left end plate of the oven body is heated too much and the water amount is reduced to a certain extent (i.e. when the weight of the cooker on the left end plate preset by the adjustable resistor RP is approached), at this moment, because the weight of the upper end of the strain gauge of the voltage-sensitive device RT1 is relatively light, the voltage of the positive power source input to the base of the NPN triode Q1 through the adjustable resistor RP and the voltage-sensitive device RT1 is relatively low (the strain gauge of the voltage-sensitive device RT1 is light and the voltage of the large output end of the resistor is relatively low), the voltage of the power source input to the base of the NPN triode Q1 after being reduced and limited by the adjustable resistor RP and the voltage-sensitive device RT1 is lower than 0.7V, so that the NPN triode 56aq 7 is cut off, the collector of the NPN triode Q1 has no output, the base of the NPN triode Q2 is reduced and limited by the resistor R1, obtains a proper, therefore, the relay J is in an electrified attraction state, and the control power supply input end of the relay J is communicated with the normally open contact end; because the normally open contact end of the relay J is connected with the positive power input ends of the electromagnetic air valve DC and the buzzer B, the negative power input ends of the electromagnetic air valve DC and the buzzer B are connected with the negative electrode of the lithium storage battery G, and the control end and the positive power input end of the relay K are connected with the positive electrode of the lithium storage battery G, at this moment, the electromagnetic air valve DC can be used as an electric tool to close the internal valve core thereof, the buzzer B can be used as an electric sound to prompt a field user, the amount of food water in the cooker of the left-end oven plate is reduced to the lowest set amount, and the food is heated sufficiently; meanwhile, the electromagnetic gas valve DC automatically closes the space between the stove plate of the stove body and the natural gas pipe, so that the left stove plate can stop heating food, and a series of adverse effects caused by overheating are prevented. In practical use, when food in the cooker on the right end plate of the oven body is heated excessively and the water amount is reduced to a certain degree (namely, when the weight of the cooker on the right end plate preset by the adjustable resistor RP1 is approached), at the moment, because the weight of the upper end of the strain gage of the pressure-sensitive device RT2 is relatively light, the voltage of the positive power source which is input to the base of the NPN triode Q3 through the adjustable resistor RP1 and the pressure-sensitive device RT2 is relatively low (the stress of the strain gage of the pressure-sensitive device RT2 is light, the resistance is large, and the voltage of the output end is relatively low), the voltage of the power source which is input to the base of the NPN triode Q3 after being subjected to voltage reduction and current limitation through the adjustable resistor RP1 and the pressure-sensitive device RT2 is lower than 0.7V, so that the NPN triode Q3 is cut off, the collector of the NPN triode Q3 has no output, the base of the NPN triode Q4 obtains proper forward, therefore, the relay J1 is in an electrified attraction state, and the control power supply input end is communicated with the normally open contact end; because the normally open contact end of the relay J1 is connected with the positive power input ends of the electromagnetic air valve DC and the buzzer B, the negative power input ends of the electromagnetic air valve DC and the buzzer B are connected with the negative electrode of the lithium storage battery G, and the control and positive power input end of the relay J1 is connected with the positive electrode of the lithium storage battery G, at this moment, the electromagnetic air valve DC can be used as an electric tool to close the internal valve core thereof, the buzzer B can be used for sounding to prompt a field user, the amount of water in the cooker of the right-end stove plate is reduced to the lowest set amount, and the food is heated sufficiently; meanwhile, the electromagnetic gas valve DC automatically closes the space between the stove plate of the stove body and the natural gas pipe, so that the stove plate at the right end stops heating food, and a series of adverse consequences caused by overheating are prevented.
As shown in fig. 2, in actual use, no matter whether the left or right oven plate heats food, the water amount in the cooker on the left or right oven plate is reduced to the lowest set weight, the NPN transistor Q2 or Q4 is turned on, the collector of the NPN transistor Q2 or Q4 outputs a low level, the low level output by the collector of any NPN transistor enters the pin 3 of the trigger signal input terminal of the short message module a1 through unidirectional conduction of the diode VD, so that the short message module a1 sends a prestored short message to the mobile phone of the user under the action of its internal circuit, and prompts the user outside the home, so that the user can take countermeasures in time (for example, timely return the cooking utensil from the upper end of the oven to home, and can also play a role of prompting that the food is cooked well).
As shown in FIG. 2, the pressure sensitive devices RT1 and RT2 are of the type I-motion and of the type IMS-C04N. The specification of the adjustable resistors RP and RP1 is 4.7M; the resistances of the resistors R1 and R2 are 20K; NPN triodes Q1, Q2, Q3 and Q4 are respectively 9014, 9013, 9014 and 9013; relay J, J1 is a 4100DC6V miniaturised relay. The diode VD is 1N4007 in size. The buzzer B is an active continuous sound buzzer finished product of a wing union brand.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An intelligent stove comprises a stove body, a pressure-sensitive device, a rechargeable battery, a charging socket, a power switch, a short message module and an electromagnetic air valve, and is characterized by also comprising a pressure sensor mechanism, a control circuit and an alarm circuit; the rechargeable battery, the charging socket, the power switch, the control circuit, the alarm circuit and the short message module are arranged in an element box, and the element box is arranged in the middle of the front lower end of the shell of the stove body; the electromagnetic air valve is arranged between an air inlet pipe of the stove body and an indoor natural gas pipe; the pressure sensor mechanisms are two same and each pressure sensor mechanism comprises a metal guide pipe and a ceramic guide rod, the lower end of each guide rod is provided with a groove, the lower end of each groove is of an open structure, and a heat insulation plate is sleeved in each groove; the upper shell of the stove body is positioned at the side ends of the two stove plates and is respectively provided with a through hole with internal threads, and the two metal guide pipes are respectively arranged in the two through holes; the two guide rods are respectively sleeved in the two guide pipes, the two pressure-sensitive devices are respectively and fixedly installed at the left end and the right end of the lower part in the lower shell of the stove body, and the heat insulation plates at the lower ends of the two guide rods are respectively positioned at the upper ends of the strain gauges of the two pressure-sensitive devices; two ends of the rechargeable battery are respectively connected with the two power input ends of the charging socket, the control circuit and the short message module through leads, two ends of the power output of the control circuit are respectively connected with two ends of the power input ends of the alarm circuit and the electromagnetic gas valve through leads, the signal output end of the control circuit is connected with the signal input end of the short message module through leads, and two ends of the two pressure-sensitive devices are respectively connected with two control signal input ends of the control circuit through leads.
2. The intelligent oven of claim 1, wherein the height of the upper ends of the guide rods of the two pressure sensor mechanisms is higher than the height of the oven pan support of the oven body.
3. The intelligent oven of claim 1 wherein the pressure sensitive device is a force sensitive resistor.
4. The intelligent stove according to claim 1, wherein the short message module is a short message alarm module, and the pin 3 of the trigger signal input end of the short message module is connected with the anode of a diode.
5. The intelligent oven of claim 1, wherein the control circuit comprises an adjustable resistor, a resistor, an NPN transistor, and a relay, wherein the adjustable resistor, the NPN transistor, and the relay are wired together via a circuit board, wherein the first and second adjustable resistor have one end connected to one end of the first and second resistors, the first and second relay positive power inputs, and the first and second relay control power inputs, wherein the first resistor has one end connected to a collector of the first NPN transistor and a base of the second NPN transistor, the second NPN transistor has a collector connected to the first relay negative power input, the second resistor has one end connected to a collector of the third NPN transistor and a base of the fourth NPN transistor, the fourth NPN transistor has a collector connected to the second relay negative power input, and an emitter of the fourth NPN transistor is grounded.
6. The intelligent oven of claim 1 wherein the alarm circuit is a source-only continuous acoustic alarm.
7. The intelligent oven of claim 1, wherein the valve core inside the electromagnetic gas valve is of a normally open structure.
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| CN110594789B (en) | 2024-08-02 |
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Effective date of registration: 20240710 Address after: 528400, 3rd and 4th floors of Building C, No. 188 Xiaofu Road, Sanjiao Town, Zhongshan City, Guangdong Province (Residence declaration) Applicant after: Guangdong Meizhi Intelligent Kitchen Appliances Co.,Ltd. Country or region after: China Address before: No. 53 Yangjiayao Village, Shejiaxiang Township, Wudi County, Binzhou City, Shandong Province, 256600 Applicant before: Yang Jingliang Country or region before: China |
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