CN2484499Y

CN2484499Y - Gas stove control device with safety recognition

Info

Publication number: CN2484499Y
Application number: CN 01219727
Authority: CN
Inventors: 林恭辉
Original assignee: TAIWAN YINGHUA CO Ltd
Current assignee: TAIWAN YINGHUA CO Ltd
Priority date: 2001-04-19
Filing date: 2001-04-19
Publication date: 2002-04-03
Anticipated expiration: 2011-04-19

Abstract

The utility model relates to a gas furnace control device, which comprises an electric unit, a control unit and an output unit; wherein the electric unit comprises two direct current powers, a switch, a direct current boost circuit and a voltage division circuit; the control unit comprises two thermocouples, two amplification circuits, an operation and control circuit and a temperature measurement circuit; the output unit comprises a driving circuit, a safety circuit and an outlet circuit of two solenoid valves; when a pan is put on the gas furnace tools, the gas furnace is switched on to enable one solenoid valve outlet circuit working to keep burning until cooked.

Description

Have the gas oven control device of identification safety concurrently

The utility model relates to a kind of gas oven control device that has identification safety concurrently, refers in particular to a kind ofly to have the oil temperature and cut off gas automatically and can prevent the gas oven control device of gas poisoning with the fire generation when overheated with pan.

General gas oven is two mouthfuls of stove and accessorys, can design and mix into following dual mode, and first kind of mode is that one of two mouthfuls of stove and accessorys are electronic type control, and another mouthful stove and accessory is mechanical type control; The second way is that two mouthfuls of stove and accessorys are electronic type control.

Yet the circuit of this dual mode is to design use respectively, can not all can use individually for above-mentioned two kinds simultaneously with a circuit.

Secondly, existing gas oven in design, not seeing has the factor that can avoid because of various softwares or hardware, reaches the safety device that prevents gas poisoning and fire generation.

The purpose of this utility model is to propose a kind of gas oven control device of being made up of control module, output unit and power unit that has the identification safety device concurrently, it can prevent that gas poisoning and fire from taking place, reach the security of control system, thereby solved the existing in prior technology problem.

The technical scheme that the utility model adopted is that it includes:

One control module, it is provided with two thermocouples, two thermocouples connect an amplifying circuit respectively, with the voltage amplification that the electric heating coupling is produced when being heated, the output of this two amplifying circuit is connected in an arithmetic control circuit, the input of arithmetic control circuit is connected in one in order to detect the temperature sensing circuit of pan temperature, and this arithmetic control circuit cooperates two thermocouples, amplifying circuit and temperature sensing circuit action, reaches gas oven gas combustion;

One output circuit, it is provided with one first magnetic valve output circuit and one drive circuit, and be connected with arithmetic control circuit respectively, the output of this drive circuit is to be connected with one second magnetic valve output circuit, and between drive circuit and arithmetic control circuit, be connected a safety circuit, this safety circuit is driven by arithmetic control circuit output control signal, so that the power supply of two magnetic valve output circuits to be provided, and makes the security of gas oven have more guarantee; And

One power unit, it is provided with a bleeder circuit, bleeder circuit is to be connected with safety circuit, this bleeder circuit is effect when safety circuit is activated, so that the input voltage branch is depressed into two thermocouples, two amplifying circuits and two magnetic valve output circuits, and in power unit, be provided with one first dc source and switch, this first dc source is to be connected with drive circuit with switch, and between first dc source and switch and arithmetic control circuit, be connected an on-off circuit, this on-off circuit is when first dc source and switch conduction, for this arithmetic control circuit power for operation;

Whereby, prevent that gas poisoning and fire from taking place, and reaches the security of control system.

Characteristics of the present utility model are: it has oil temperature and cuts off gas with pan when overheated automatically, and prevent that pan from damaging and the fire generation, when causing gas oven to stop working because of the external environment factor, then make magnetic valve output circuit closed gas, prevent that gas poisoning and fire from taking place.

It makes two electric couplings of control module connect an amplifying circuit respectively, the output of this two amplifying circuit is connected to an arithmetic control circuit, the output of this arithmetic control circuit respectively with safety circuit, drive circuit and the one first magnetic valve output circuit of output unit, the output of drive circuit connects one second magnetic valve output circuit, begin action output in order to this arithmetic control circuit, can make a wherein magnetic valve output circuit effect, to keep burning, reaching gas oven gas combustion provides the purpose of cooking.

Because it is connected with safety circuit between the arithmetic control circuit of control module and drive circuit, so can prevent because of various softwares, hardware factor, cause the bad of arithmetic control circuit, avoid causing danger, automatically the gas of closed gas stove, prevent that gas poisoning and fire from taking place, to reach the security of control system.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is the circuit diagram of the utility model power unit;

Fig. 3 is the circuit diagram of the utility model control module and output unit.

Further specify preferred embodiment of the present utility model in conjunction with above-mentioned each accompanying drawing now.See also Fig. 1 and Fig. 2, the utility model is a kind of gas oven control device that has identification safety concurrently, this gas oven mainly provides and cooks, its control device needs the free convection of power supply, gas cooperation air etc. when burning, reach the purpose of burning, on control device, include power unit 1, control module 2 and output unit 3.This control module 2 is made up of flame-out two thermocouple TC1, TC2, two amplifying

circuits

21,22, a temperature sensing circuit 23, a power supply boot-strap reset circuit 24, a power shortage testing circuit 25, an oscillating circuit 26 and an arithmetic control circuit 27; Output unit 3 is made up of one drive circuit 31, two magnetic

valve output circuits

32,33, two

LED display circuits

34,35, a warning circuit 36 and a safety circuit 37.

This power unit 1 provides the required power for operation of gas oven, and it is made up of one first dc source and switch 11, one second dc source and switch 12, a direct current booster circuit 13, a bleeder circuit 14 and an on-off circuit 15, wherein:

First dc source and switch 11 are the first kind of control modes that is applied in above-mentioned gas oven, it is connected to form by a direct current power supply B1 and a switch SW, the Chang Kaiduan contact of this switch SW is to be connected in DC voltage booster circuit 13, this first dc source B1 supplies power to DC voltage booster circuit 13 when the switch SW conducting.

Second dc source and switch 12 are the second kind of control modes that is applied in above-mentioned gas oven, two mouthfuls of stove and accessorys are electronic type control, it is connected to form by a direct current power supply B2 and one group of switch SW 1, SW2, the Chang Kaiduan contact of this grade switch SW 1, SW2 is connected in a drive circuit 31 that is connected to form by IC U3, transistor Q1, Q2 assembly, and this drive circuit 31 is connected in an on-off circuit 15 that is connected to form by transistor Q4, diode D2-D5 and resistance R 8-R12 assembly;

This drive circuit 31 causes transistor Q4 conducting, and supplies power to arithmetic control circuit 27 by diode D3 when switch SW 1 is in normally off; When switch SW 2 is in normally off, causes transistor Q4 conducting, and supply power to arithmetic control circuit 27 by diode D2, power supply B2 then provides DC voltage booster circuit 13 required dc source via transistor Q4.

DC voltage booster circuit 13 is by IC U4, resistance R 22-R25, capacitor C 9-C12, E4, discharges and recharges coil L1 and fast diode D6 assembly connects to form, wherein assemblies such as ICU4, capacitor C 9-C11, resistance R 22-R24 constitute oscillating circuit and reset bleeder circuit, so that the galvanic current source to be provided; Resistance R 25 is current-limiting resistances, with the restriction output current; Fast diode D6, capacitor C 12, E4 constitute current rectifying and wave filtering circuit, so that power circuit is more stable, this DC voltage booster circuit 13 boosts to 5V with the direct current power (3V1) of input.

Bleeder circuit 14 is to be connected to form by assemblies such as IC U2A, resistance R 2, R5, and it will convert 2.5V to from safety circuit 37 out-put supply 5V1, so that the working power of thermocouple TC1, TC2, amplifying

circuit

21,22 and magnetic

valve output circuit

32,33 to be provided.

Thermocouple TC1 is connected in the amplifying circuit 21 that is connected to form by assemblies such as an IC U2C, capacitor C 8, diode D5, resistance R 18, the output of amplifying circuit 21 is connected in an arithmetic control circuit 27 that is connected to form by IC U1 assembly, and the output of arithmetic control circuit 27 (RA4) is connected in magnetic valve output circuit 32;

This thermocouple TC1 opens gas at gas oven with manual strength, and ignition and being heated when producing voltage, be amplified to arithmetic control circuit 27 via amplifying circuit 21, and make 32 outputs of magnetic valve output circuit substitute manual strength to keep burning, when causing gas oven to stop working because of the external environment factor, this magnetic valve output circuit 32 promptly can closed gas, takes place so can prevent gas poisoning and fire.

Thermocouple TC2 is connected in an amplifying circuit 22 that is connected to form by assemblies such as IC U2B, capacitor C 7, diode D4, resistance R 7, the output of amplifying circuit 22 is connected in arithmetic control circuit 27, the output of arithmetic control circuit 27 (RB3) is connected in safety circuit 37, the output of safety circuit 37 is connected in drive circuit 31, and the output of drive circuit 31 is connected to magnetic valve output circuit 33,

LED display circuit

34,35 and warning circuit 36;

This thermocouple TC2 cooperates two mouthfuls of stove and accessorys to be the electronic type control mode, it opens gas at gas oven with manual strength, and ignition and being heated when producing voltage, be amplified to arithmetic control circuit 27 via amplifying circuit 22, and make 33 outputs of magnetic valve output circuit substitute manual strength to keep burning by safety circuit 37 and drive circuit 31, when causing gas oven to stop working because of the external environment factor, this magnetic valve output circuit 33 promptly can closed gas, prevents the generation of gas poisoning and fire.

Temperature sensing circuit 23 is connected in arithmetic control circuit 27, it cooperates thermocouple TC1, amplifying circuit 21 to use with magnetic valve output circuit 32, it is connected to form by thermistor RT, resistance R 1, R4, capacitor C 5 assemblies, and wherein thermistor RT is located at the temperature that pan is detected in the pan below;

When temperature was higher than the temperature of setting, this arithmetic control circuit 27 can cut off magnetic valve output circuits 32, automatically cut off gas with pan when overheated to reach the oil temperature, and prevented the damage and the breaking out of fire of pan.

Power supply boot-strap reset circuit 24 is connected in arithmetic control circuit 27, it is to be connected to form by diode D1, resistance R 3 and electric capacity E1 assembly, this power supply boot-strap reset circuit 24 is when detecting power supply and being subjected to opening, and reaches to be set in when this arithmetic control circuit 27 begins to activate to begin action in the default value.

Power shortage testing circuit 25 is connected in arithmetic control circuit 27, it is connected to form by resistance R 6, capacitor C 3, E3 assembly, this power shortage testing circuit 25 is to detect power supply to use when the voltage of setting value is following, this arithmetic control circuit 27 promptly can show by driving LED display circuit 34, changes battery as can be known to make the user.

Oscillating circuit 26 is to be connected to form by assemblies such as quartz crystal X1, capacitor C 1, C2, and it provides the time sequential pulse of arithmetic control circuit 27 when computing.

Arithmetic control circuit 27 inside have unit such as analog/digital conversion, logical operation and storage, cooperate two thermocouple TC1, TC2, two amplifying

circuits

21,22, temperature sensing circuit 23, power supply boot-

strap reset circuit

24 and 25 runnings of power shortage testing circuit, provide the purpose of cooking to reach gas oven gas combustion.

LED display circuit 34 is to cooperate thermocouple TC1, magnetic valve output circuit 32, temperature sensing circuit 23 to use with power shortage testing circuit 25, when circuit signal more than detecting and default value do not meet, then show error message, provide the user to learn problem points via LED display circuit 34.

LED display circuit 35 is to cooperate thermocouple TC2, magnetic valve output circuit 33 to use with power shortage testing circuit 25, when circuit signal more than detecting and default value do not meet, show error message via LED display circuit 35, provide the user to learn problem points.

Warning circuit 36 is when arithmetic control circuit 27 detects each circuit signal and default value and do not meet, and sends alarm sound, provides the user to learn problem points.

Safety circuit 37 is connected between arithmetic control circuit 27 and the drive circuit 31, it is connected to form by transistor Q3, Q5, resistance R 13, R21, R25, capacitor C 6, E2, E5 assembly, this safety device 37 is driven by arithmetic control circuit 27 output control signals, providing bleeder circuit 14 operating voltages, and make the security of this gas oven more secure.This safety circuit can prevent because of various softwares, hardware factor, causes bad the avoiding of arithmetic control circuit 27 to cause danger, and the gas of closed gas stove prevents that gas poisoning and fire from taking place, to reach the security of control system automatically.

After the cooking pan is placed on Gas cooker, open gas oven switch on it, open gas and ignition with manual strength this moment, and the voltage of thermocouple TC1 (or TC2) generation at the same time inputs to arithmetic control circuit 27 via amplifying circuit 21 (or 22); One direct current power supply and switch 11 (or 12) control power supply is also arranged to arithmetic control circuit 27 when opening gas switch, this arithmetic control circuit 27 begins action output, make magnetic valve output circuit 32 (or 33) effect, to keep burning, reaching gas oven gas combustion provides the purpose of cooking.

In sum,, can prevent that gas poisoning and fire from taking place, reach the security of control system, and then reach the purpose of cooking is provided by the utility model circuit design.

Above-described only is the specific embodiment of one of the utility model the best; but the utility model structural feature is not limited thereto; anyly be familiar with the personage of this skill in field of the present utility model; can think easily and variation or modification, all should still belong to the protection domain of the utility model claims.

Claims

1, a kind of gas oven control device that has the identification safety device concurrently is characterized in that it comprises:

One power unit, it is provided with a bleeder circuit, bleeder circuit is to be connected with safety circuit, this bleeder circuit is effect when safety circuit is activated, so that the input voltage branch is depressed into two thermocouples, two amplifying circuits and two magnetic valve output circuits, and in power unit, be provided with one first dc source and switch, this first dc source is to be connected with drive circuit with switch, and between first dc source and switch and arithmetic control circuit, be connected an on-off circuit, this on-off circuit is when first dc source and switch conduction, for this arithmetic control circuit power for operation.

2, the gas oven control device that has the identification safety device concurrently as claimed in claim 1 is characterized in that described arithmetic control circuit, and it can be connected with a power supply boot-strap reset circuit and a power shortage testing circuit respectively.

3, the gas oven control device that has the identification safety device concurrently as claimed in claim 1 is characterized in that described drive circuit, and its output is connected with two luminous display circuits with a warning circuit respectively.

4, the gas oven control device that has the identification safety device concurrently as claimed in claim 1, it is characterized in that described first dc source, it is to be connected a direct current booster circuit with on-off circuit, the input of DC voltage booster circuit connects one second dc source and on-off circuit, and this DC voltage booster circuit is that the output voltage during with second dc source and on-off circuit conducting boosts.