CN1081775C - Circuit for controlling magnetic power unit of gas range - Google Patents
Circuit for controlling magnetic power unit of gas range Download PDFInfo
- Publication number
- CN1081775C CN1081775C CN94118959A CN94118959A CN1081775C CN 1081775 C CN1081775 C CN 1081775C CN 94118959 A CN94118959 A CN 94118959A CN 94118959 A CN94118959 A CN 94118959A CN 1081775 C CN1081775 C CN 1081775C
- Authority
- CN
- China
- Prior art keywords
- unit
- microcomputer
- load
- driving voltage
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Electronic Switches (AREA)
Abstract
A circuit for controlling magnetic power unit of gas ranges is capable of, under the condition of overloading of microcomputer, cutting off the output from the driving voltage control unit and using a photoelectrical coupler to sense the overloading state and cut off the driving voltage supplied to the magnetic power unit as well as improving safety and reliability of anti-leakage of the gas ranges. The control circuit comprises a microcomputer, a driving voltage control unit, a load driving control unit, a load driving unit, and a load state sensing unit, which is applied to detect the output from the load driving unit and transfer the sensing signal of load status to the microcomputer.
Description
The present invention relates to be used to control a kind of circuit of the magnetic power unit (MPU) of gas-cooker, relate more specifically under the microcomputer overload situations or under the driving voltage abnormality, the energy sever supply also improves a kind of circuit of the reliability of the anti-gas leakage of gas-cooker thus to the driving voltage of MPU.
Usually, gas-cooker has a magnetic power unit (MPU), and it is connected with a thermocouple in work, is used to change the temperature of the flame that is produced by burner.When the gas-cooker operation irregularity, this MPU is used for cutting off fuel gas supply, improves the reliability of gas-cooker thus.
With reference to Fig. 1, it represents a traditional gas-cooker.As shown in Figure 1, this gas-cooker comprises a gaspipe 1, and this air supply pipe 1 has the air inlet 2 that extends from its precalculated position downwards.Gas outlet 3 is arranged on the precalculated position of air supply pipe 1 and with fuel gas inlet 2 and separates a preset distance.The gas outlet extends upward from air inlet 2.A MPU6 is installed on the air supply pipe 1 of gas outlet 3 one sides.This MPU6 has a magnet 5, is wound with coil 4 thereon.This termination connected a termination 7 on one end (left end) of an axle that in air supply pipe 1, is provided with, so that can selectively be attracted by magnet 5 or separate with it.In air supply pipe 1, on the position of leaving termination 7 one preset distances on this, to right, a seal 9 is housed.Between termination 7 and seal 9, be provided with a compression ring spring 8 around axle.Burner 10 is connected on the air supply pipe 1 via a pipe that is connected with gas outlet 3.In order to spray the combustion gas of supplying with via the pipe that is connected with gas outlet 3 by air supply pipe 1, a nozzle 11 has been installed below burner 10.On a precalculated position, be provided with a thermocouple 12, so that measure the temperature of burner 10 near burner 11 tops.
This thermocouple 12 has two terminals, and they are connected with MPU6 and gas outlet 3 respectively by means of lead.
The working method of traditional gas-cooker with said structure is as described below.
When the user wants to operate the cooking of gas-cooker do, he will depress scheduled time of ignition switch, so that ignition switch is switched to its opening state.When the ignition switch opening state, the axle that is provided with in air supply pipe 1 moves towards MPU6, and seal 9 and axle are moved in the same direction.Consequently the gas outlet 3 of air supply pipe 1 is opened, and gas supplies to nozzle 11 by air inlet 2 and the gas outlet 3 that is opened.By means of nozzle 11 combustion gas upwards is injected in the burner 10, is then caught fire, flame is generated on the top of burner 10 by point.
At this moment, be installed near the thermocouple 12 in burner 10 tops and produce an electromotive force by the temperature that fire fires.
When this electromotive force generated, the coil 4 by MPU6 just flow through electric current, makes magnet 5 produce magnetic force thus.Because the magnetic force of magnet 5, the termination 7 of being shifted to magnet 5 by the motion of axle just is drawn onto on the magnet 5.
In the case, termination 7 remains on the state that is attracted on the magnet 5 that produces magnetic force, even at this moment ignition switch no longer is depressed.
Because when burner 10 produced flame, thermocouple 12 produced electromotive force constantly, makes termination 7 remain on the state that is being drawn by the magnet of MPU6, so combustion gas supplies to burner 10 constantly and fired.
On the other hand, when gas combustion, when making the fray-out of flame of burner 10 owing to wind or by the soup that overflows in the soup of cooking, the electromotive force that is produced by thermocouple 12 descends significantly.Consequently, the electric current that flows through the coil 4 of MPU6 drops to the insignificant degree of essence, makes magnet 5 lose its magnetic force thus.When magnet 5 lost its magnetic force, its home position was removed and then moves on in termination 7 from magnet 5.
Meanwhile, because the forfeiture of magnet 5 magnetic force and the resilience of spring 8 make seal 9 get back to its home position.Consequently, seal 9 has been closed the gas outlet 3 of air supply pipe 4, has cut off the supply of combustion gas thus.
With reference to Fig. 2, its expression is used for controlling the circuit of the MPU of the gas-cooker with said structure.As shown in Figure 2, this control circuit comprises that control signal that 21, one bases of microcomputer that are used to control the gas-cooker overall work are produced by microcomputer 21 drives the relay drive unit 22 of a relay unit 23.Relay unit 23 is connected driving voltage source V
DCAnd be connected with MPU via a resistance R.In Fig. 2, this MPU is by label 24 expressions.When relay unit 23 was started by relay drive unit 22, MPU24 was from driving voltage source V
DCReceived a driving voltage, so it can cut off the gas supply.
Now the working method of control circuit with said structure is done a description.
When the user connects gas-cooker and the corresponding key of required cooking method, the microcomputer 21 of then controlling the gas-cooker overall work produces the control signal of a high level and is sent to relay drive unit 22 then according to the control program that is stored in wherein.
When slave microcomputer 21 received the control signal of high level, relay drive unit 22 was supplied with relay unit 23 with a low level output signal.When the signal from relay drive unit 22 is received by relay unit 23, from driving voltage source V
DCDrive voltage supply therefore to the coil 231 of relay unit 23, in coil 23 upper reaches overcurrent.Consequently 23 relay 232 is transformed into its opening state to relay in the unit, makes thus from driving voltage source V
DCDriving voltage supply to MPU24 via the relay 232 and the resistance R of conducting.
Therefore, at driving voltage from driving voltage source V
DCDuring the supply MPU24, the termination 7 of MPU24 keeps attracting mutually with magnet 5.In the case, because gas outlet 3 remains on its open mode, so combustion gas supplies to burner 10 constantly.
On the other hand, when gas-cooker is worked in end of cooking or gastronomical process when undesired, microcomputer 21 produces low level control signals and also is sent to relay drive unit 22.
When slave microcomputer 21 received low level control signal, relay drive unit 22 supplied to relay unit 23 with a high level output signal.When this signal from relay drive unit 22 is received by relay unit 23, will there be driving voltage from driving voltage source V
DCSupply on the coil 231 of relay unit 23, therefore do not have electric current to flow through coil 231.Consequently, the relay 232 of relay unit 23 is switched to its off state, stops MPU from driving voltage source V thus
DCReceive driving voltage.
Therefore, at driving voltage from driving voltage source V
DCDo not supply to during the MPU24, the termination 7 of MPU 24 keeps being separated with magnet.In the case, because gas outlet 3 remains on its closed condition, so there is not gas supplied burner 10.
But, when the signal that is produced by microprocessor 21 under microcomputer 21 overloads has high level, because the relay 232 of relay unit 23 remains on its opening state and force the termination of MPU 24 to be in the state of being attracted, so the leakage of gas may take place.In addition, above-mentioned control circuit is not checked the function of the relay abnormality of relay unit 23.Consequently can not sever supply when the gas-cooker operation irregularity to the driving voltage of MPU24.Thereby traditional control circuit has the problem that makes the security reliability reduction that prevents gas leakage.
Therefore, one object of the present invention is to provide a kind of circuit that is used to control the MPU of gas-cooker, it can cut off the output from driving voltage under the situation of microcomputer overload, and detect load state with photoelectrical coupler, cut off thus and offer the driving voltage of MPU, and improve the security reliability of the anti-gas leakage of gas-cooker.
According to the present invention, this purpose is to utilize to provide a kind of circuit of controlling the magnetic power unit of gas-cooker to realize that this circuit comprises: a microcomputer is used to control the overall work of gas-cooker; A driving voltage control unit is used for producing first driving voltage for its driving voltage control signal according to the microcomputer that receives; A load driving control unit, the drive control signal that is used for giving it according to the microcomputer that receives produces one and drives signal when first driving voltage that receives from driving voltage control unit; A load drive unit is used for according to from the output of load driving control unit magnetic power unit being sent one second driving voltage; And a load condition sensing unit, be used to detect from the output of load drive unit and with the load condition transducing signal and send microcomputer to.
Other purpose of the present invention and situation will be illustrated the description of embodiment with reference to accompanying drawing by following.
Fig. 1 is the integrally-built sectional view of expression gas-cooker;
Fig. 2 is the traditional circuit that expression is used to control the MPU of gas-cooker;
Fig. 3 represents the circuit diagram that is used to control the MPU of gas-cooker according to of the present invention;
Fig. 4 A to 4J is respectively the oscillogram of each several part output signal in the circuit shown in Figure 3.
With reference to Fig. 3, it has described a kind of circuit that is used to control the MPU of gas-cooker according to of the present invention.This control circuit comprises: a microcomputer 31 is used to control the overall work of gas-cooker; A load driving control unit 32 is used to respond the drive control signal that comes from microcomputer 31 and produces the load drive control signal; A load drive unit 33 is used to respond the load drive control signal that comes from load driving control unit 32 and drives a MPU 34; A load condition sensing unit 35 is used to detect from the output of load drive unit 33 and with the load condition transducing signal and is sent to microcomputer 31; And a driving voltage control unit 36, the driving voltage control signal that is used to respond from microcomputer 31 produces the load drive control signal.
Load condition sensing unit 35 has photoelectrical coupler PC, is used for the output of sensing load drive unit 34, and sends it to microcomputer 31 as state detection signal via resistance R 8 and capacitor C 5.
Driving voltage control unit 36 comprises a transistor Q1, its emitter stage with provide+voltage source of B1 voltage is connected and is connected with base stage by a resistance R 1, its colelctor electrode is connected with ground via capacitor C1 that is connected in parallel to each other and C2.This driving voltage control unit 36 also comprises a transistor Q2, and its base stage is via diode D1, and capacitor C 4 and resistance R 5 are connected with microcomputer 31, and via the resistance R 4 that is connected in parallel to each other, capacitor C 3 and diode D2 are connected with ground.Transistor Q2 receives the driving voltage control signal from microcomputer on its base stage.The grounded emitter of this transistor Q2, its colelctor electrode is connected via the base stage of resistance R 2 with transistor Q1.
To make an explanation to operation principle in conjunction with Fig. 4 A to 4J now with control circuit of said structure according to the present invention.
When gas-cooker was working properly, microcomputer 31 was carried out and is stored in one of them program and produces an output signal V1, and it is the square wave as shown in Fig. 4 A.This signal V1 outputs to driving voltage control unit 36 by the delivery outlet P2 of microcomputer 31.When receiving signal V1 in driving voltage control unit 36, this signal will be subjected to the dividing potential drop of resistance R 5 and R6 in this driving voltage control unit 36, and be sent to capacitor C 4 and then by diode D1 and D2 rectification.Then, capacitor C 3 is charged and discharge work.When this charge and discharge of capacitor C 3 was worked, the signal V2 as shown in Fig. 4 B was applied on the base stage of transistor Q2.
When receiving signal V2, transistor Q2 is switched on, and causes that thus it is low level state that transistor Q1 is transformed into its base stage.Consequently, transistor Q2 is switched on, so that the signal V3 as shown in Fig. 4 C outputs to load drive controller 321 in the load driving control unit 32 by it.
On the other hand, when the user had selected a required key on an input block (not shown), microcomputer 31 is the drive control signal of output high potential on delivery outlet P0 and P1 respectively.These drive control signal are received by the driving governor 321 of load driving control unit 32.When receiving these drive control signal, load drive controller 321 is applied to relay coil RL11 and RL12 with the driving signal of electronegative potential respectively, so that electric current flows through relay coil RL11 and RL12, consequently, the relay R Y11 and the RY12 of load drive unit 33 are activated, and make voltage+B2 be applied to MPU34 via the relay R Y11 that is switched on and RY12 and resistance R 11 thus.
When receiving voltage+B2, MPU34 produces an electromotive force, and this electromotive force then makes the magnet that is located among the MPU34 produce magnetic force.Be attracted to magnet because this magnetic force just makes to be located among the MPU34 and mechanically to be biased to a termination leaving magnet, just can make the burner of gas-cooker be supplied to combustion gas thus.When load drive unit 33 was supplied with MPU34 voltages+B2, this voltage+B2 also supplied to load condition sensing unit 35, and photoelectrical coupler PC is activated.When photoelectrical coupler PC was activated state, load condition sensing unit 35 will the low level state transducing signal as shown in Fig. 4 E supplies to the input port IN of microcomputer 31.According to the state transducing signal V4 that is received, the condition that microcomputer 31 is determined load is normal and keeps the work at present of load driving control unit 32 and driving voltage control unit 36.
At this moment, if microcomputer 31 senses an overload in gas-cooker work, the predetermined low level that the output signal V1 that the delivery outlet P2 of microcomputer 31 upward exports has the high-level DC voltage as shown in Fig. 4 F or blocked by capacitor C 4.In the case, diode D1 produces a low level output, as shown in Fig. 4 G.When the base stage of transistor Q2 received low-potential signal from diode D1, this transistor was turned off.At off state, transistor Q2 imposes on the base stage of transistor Q1 with high level signal, causes that thus transistor Q1 is turned off.When transistor Q1 off state, be applied to voltage V3 on the load drive controller 321 of load driving control unit 32 and have waveform shown in Fig. 4 H.
When receiving the voltage V3 with Fig. 4 H waveform, load drive controller 321 is stopped work, so there is not electric current to flow through relay coil RL11 and RL12.Consequently, the relay R Y11 and the RY12 of load drive unit 33 also are disconnected, and make low level voltage V5 of load drive unit 33 outputs thus, as shown in Fig. 4 I.
When low level voltage V5 was applied to MPU34, the magnet of MPU34 just lost its magnetic force, and the termination is separated from magnet.Consequently, sealed the closure in gas outlet be not so that have gas supply in the burner of gas-cooker.
Low level signal from load drive unit 33 also supplies to load condition sensing unit 35, causes that thus photoelectrical coupler PC quits work.When photoelectrical coupler PC quit work, the voltage VCC shown in Fig. 4 J was applied to the input port IN of microcomputer 31 via resistance R 7 and R8 and capacitor C 5.
Consequently, the drive control signal of the load drive controller 321 that is applied to load driving control unit 32 by the delivery outlet P0 and the P1 of microcomputer 31 has low level.
Illustrated just as described above, the invention provides a kind of circuit of controlling the MPU of gas-cooker, when it can be detected in the abnormality when load, cut-out is to the supply of load driving voltage, and the gas leakage that stops microcomputer and load driving circuit abnormality work to cause thus, and improved the security reliability of gas-cooker.
Though for the purpose of illustrating the preferred embodiments of the present invention have been done openly, those skilled in the art understands, under the situation of the disclosed scope of the invention and spirit, can make various remodeling in not departing from as setting up claims, additional and replacement.
Claims (4)
1. a circuit of controlling the magnetic power unit of gas-cooker comprises a magnetic power unit (34), it is characterized in that further comprising:
A microcomputer (31) is used to control the overall work of gas-cooker;
A driving voltage control unit (36), it is operably connected to described microcomputer (31), is used for producing first driving voltage for its driving voltage control signal according to the microcomputer (31) that receives;
A load driving control unit (32), it is operably connected to described microcomputer (31), and the drive control signal that is used for giving it according to the microcomputer (31) that receives produces one and drives signal when first driving voltage that receives from driving voltage control unit (36);
A load drive unit (33), it is operably connected to described load driving control unit (32) and described magnetic power unit (34), is used for according to from the output of described load driving control unit (32) described magnetic power unit (34) being sent one second driving voltage; And
A load condition sensing unit (35), it is operably connected to described load drive unit (33) and described microcomputer (31), is used for detecting sending microcomputer (31) to from the output of load drive unit (33) and with a load condition transducing signal.
2. circuit according to claim 1, wherein said load drive unit (33) comprises a pair of relay (RY11, RY12), it is operably connected to described load driving control unit (32) and described magnetic power unit (34), is used for also sending described second driving voltage to described magnetic power unit (34) and described load condition sensing unit (35) by the driving signal enabling from load driving control unit (32).
3. circuit according to claim 1, wherein said load condition sensing unit (35) comprises a photoelectrical coupler (PC), it is operably connected to described load drive unit (33) and described microcomputer (31), is used for the output of the described load drive unit of sensing (33) and described load condition transducing signal is offered described microcomputer (31).
4. circuit according to claim 1, wherein driving voltage control unit (36) comprising: a first transistor (Q1), it is operably connected to described microcomputer (31), is used for by the driving voltage control signal control from described microcomputer (31); And a transistor seconds (Q2), it is operably connected to described microcomputer (31), is used for being carried out control so that described first drive voltage supply is arrived described load driving control unit (32) according to the output of described the first transistor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR25335/93 | 1993-11-26 | ||
| KR1019930025335A KR950014685A (en) | 1993-11-26 | 1993-11-26 | MPU driving control circuit of gas stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108373A CN1108373A (en) | 1995-09-13 |
| CN1081775C true CN1081775C (en) | 2002-03-27 |
Family
ID=19368983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94118959A Expired - Fee Related CN1081775C (en) | 1993-11-26 | 1994-11-22 | Circuit for controlling magnetic power unit of gas range |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR950014685A (en) |
| CN (1) | CN1081775C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887214B (en) * | 2014-03-27 | 2016-10-26 | 上海华力微电子有限公司 | A kind of temperature control system for semiconductor etching device and method |
| KR20230001474A (en) | 2021-06-28 | 2023-01-04 | 김유경 | Crop Support Attachment Clip |
| KR102611607B1 (en) | 2021-07-06 | 2023-12-07 | 김유경 | Clip |
| KR102343554B1 (en) | 2021-07-09 | 2021-12-24 | 김유경 | Clip for a support |
| KR102480571B1 (en) | 2022-05-09 | 2022-12-23 | 김유경 | Clip for a support |
-
1993
- 1993-11-26 KR KR1019930025335A patent/KR950014685A/en not_active Application Discontinuation
-
1994
- 1994-11-22 CN CN94118959A patent/CN1081775C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1108373A (en) | 1995-09-13 |
| KR950014685A (en) | 1995-06-16 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |