CN201554926U - System for controlling solenoid valve of household appliance - Google Patents
System for controlling solenoid valve of household appliance Download PDFInfo
- Publication number
- CN201554926U CN201554926U CN2009202554514U CN200920255451U CN201554926U CN 201554926 U CN201554926 U CN 201554926U CN 2009202554514 U CN2009202554514 U CN 2009202554514U CN 200920255451 U CN200920255451 U CN 200920255451U CN 201554926 U CN201554926 U CN 201554926U
- Authority
- CN
- China
- Prior art keywords
- solenoid valve
- switch
- controller
- control system
- electric appliance
- 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 - Lifetime
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/10—Fail safe for component failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
Abstract
The utility model discloses a system for controlling a solenoid valve of a household appliance. The system comprises a switch, a controller and a safety detection circuit, wherein the switch is used for controlling current of the solenoid valve; the controller is used for detecting whether the switch failure occurs; and the safety detection circuit is used for monitoring whether the controller failure occurs and comprises a filter element allowing waves in the special frequency band to pass through. Since the controller can detect the working state of the switch, if the switch failure occurs, the controller detects and correspondingly controls the switch failure in time to prevent the fuel gas leakage since the solenoid valve is always opened when the switch is short-circuited.
Description
Technical field
The utility model relates to a kind of control system of household electric appliance, relate in particular to a kind of have can drive solenoid valve and make it be held open the control system of state.
Background technique
Another part number of patent application of claimant of the present utility model is the control system that 200910031364.5 Chinese invention patent application has disclosed a kind of gas cooker.Comprise whether normal hardware watchdog (watch dog) circuit of an operation that is used for monitor controller in this control system.When if controller causes program fleet to enter the endless loop state owing to interference, this watchdog circuit just can't receive the square signal from microprocessor, thereby the switch that is connected with this watchdog circuit also just can't be driven and disconnect, and then close solenoid valve, avoid causing the leakage of combustion gas because of the fault of microprocessor.
Yet the watchdog circuit of above patent application exists a potential drawback.When controller occurs when unusual, controller still might be exported the square signal of certain frequency to watchdog circuit, though the frequency of this square signal has exceeded the square wave frequency of proper functioning, watchdog circuit but can be judged as controller by mistake and be in normal working state, thereby the signal of feedback normal working sends the instruction of opening the switch that is connected with watchdog circuit to controller, cause solenoid valve to be opened, cause the leakage of combustion gas.
In view of this, be necessary existing control system is improved, with the generation of the security incident further avoiding causing because of the components and parts fault.
Summary of the invention
The purpose of this utility model is to provide a kind of control system of solenoid valve of household electric appliance, and it can reduce or avoid the situation of the gas leakage that causes because of the components and parts fault to take place.
To achieve these goals, the control system of the solenoid valve of a kind of household electric appliance of the present utility model, it comprises the switch of the electric current that is used for control electromagnetic valve, whether detecting switch exists the controller of fault, and be used for the safety detection circuit whether monitor controller exists fault, wherein this safety detection circuit comprises the filter element that the ripple that allows special frequency channel passes through.
As further improvement of the utility model, described filter element comprises high-pass filter and the low-pass filter that cascade connects.
As further improvement of the utility model, described filter element comprises band-pass filter.
As further improvement of the utility model, described household electric appliance are gas cookers, and this gas cooker comprises can manually operated stopcock, the current drives solenoid valve that cooperates with stopcock, be used to receive the burner of fuel gas flow, and the igniter that is used for the ignition combustion device.
Compared with prior art, the beneficial effects of the utility model are: because this is provided with the filter element that the ripple that only allows special frequency channel passes through in the safety detection circuit, thoroughly stopped error signal when controller is unusual by the safety detection circuit, thus the gas leakage that the control system of avoiding solenoid valve causes because of the fault of components and parts.
Description of drawings
Fig. 1 is the circuit theory schematic representation of control system of the solenoid valve of household electric appliance of the present utility model;
Fig. 2 is the circuit diagram of first kind of mode of execution of safety detection circuit of the present utility model;
Fig. 3 is the circuit diagram of second kind of mode of execution of safety detection circuit of the present utility model.
Embodiment
The circuit theory schematic representation of the control system of the solenoid valve of the household electric appliance of shown in Figure 1 is this utility model.In the present embodiment, these household electric appliance are a kind of gas cookers, and it comprises solenoid valve 2, burner (not shown), igniter (not shown), control system 54, flame detection device 6 and the trigger switch (not shown) of stopcock 1, current drives.Control system 54 comprises first, second and third switch 541,542,543 of connecting with solenoid valve 2 equally, and in the present embodiment, three switches are triode, and switch also can adopt other forms, as controllable silicon, relay, MOSFET or its combination etc.These three triodes 541,542,543 are all realized control by a controller 544, this controller can adopt as the microprocessor in the 3rd enforcement, certainly also can adopt other forms of intergrated circuit, as application-specific IC (Application Specific Integrated Circuit, ASIC) or field programmable gate array (Field Programmable Gate Array, FPGA) etc.In the present embodiment, controller 544 is a microprocessor, and it comprises P1～P5 input/output end port.Wherein the P1 port is connected with the collector electrode of first switch (Q4) 541, and the P2 port is connected with the base stage of first switch (Q4) 541, and the P3 port is connected with the collector electrode of second switch (Q17) 542, and the P4 port is connected with the base stage of second switch (Q17) 542.
Safety detection circuit 545 (also can be called hardware watchdog, watch dog circuit) is connected between the base stage of the P5 port of microprocessor 544 and the 3rd switch (Q19) 543, whether the operation that is used for monitoring microprocessor is normal, as normally then can further driving the 3rd switch 543.
Cooperate with reference to shown in Figure 2, the hardware watchdog circuit 545 of first kind of mode of execution of the present utility model comprise a block isolating circuit 5450, a high-pass filter 5451, with a low-pass filter 5452, an AC/DC (AC/DC) change-over circuit 5453 and a power driving circuit 5454 of high-pass filter 5451 cascades.In the present embodiment, the filter element that high-pass filter 5451 and the low-pass filter 5452 common ripples that constitute the permission special frequency channel pass through, be exemplified below: can in high-pass filter 5451, set the low-limit frequency that allows the square wave model passed through, for example setting low-limit frequency is 950 hertz, be that tolerance frequency is higher than 950 hertz square signal and passes through, similarly, can in low-pass filter 5452, set the highest frequency that allows the square wave model passed through, for example setting highest frequency is 1050 hertz, be that tolerance frequency is lower than 1050 hertz square signal and passes through, so just in safety detection circuit 545, form a frequency range and be 100 hertz square signal band.The square signal of exporting when supposing controller 544 proper functioning is 1000 hertz, and all think and be within the acceptable margin of error being offset 50 hertz up and down, then, only make normal square signal can pass through filter element by being used of high-pass filter 5451 and low-pass filter 5452.Square signal by filter element is driving the 543 closed conductings of the 3rd switch through AC/DC change-over circuit 5453 and by power driving circuit 5454.If microprocessor 544 causes program fleet to be absorbed in a certain block owing to disturbing, when entering the endless loop state, block isolating circuit 5451 just can't receive the square signal from port P5, the square signal that exceeds normal setpoint frequency that perhaps receives can't be by the filter element by high-pass filter 5451 and low-pass filter 5452 common structures, thereby the 3rd switch 543 also just can't be driven and disconnect, and then close solenoid valve, avoid causing the leakage of combustion gas because of the fault of microprocessor.
With reference to figure 3, the hardware watchdog circuit 545 of second kind of mode of execution of the present utility model is similar with first kind of mode of execution among Fig. 2, difference is among Fig. 3 to use a band-pass filter 5451 ' as filter element, and the bandwidth of the square signal that the frequency range of this band-pass filter 5451 ' sends during with controller 544 proper functioning is corresponding.Use the benefit of a band-pass filter 5451 ' to be that cost is lower among Fig. 3, its difference with respect to the mode of execution among Fig. 2 is: the mode of execution among Fig. 2 can be adjusted the minimum setpoint frequency of high-pass filter 5451 and the highest setpoint frequency of low-pass filter 5452 easily according to the requirement of control system, but the cost of mode of execution is higher among Fig. 2.
In addition, the method of work of control system of the present utility model and flow process have been that (particularly Fig. 4 to Fig. 7 and corresponding character are described) done detailed description in 200910031364.5 the Chinese invention patent application at another part number of patent application of claimant of the present utility model, do not repeat them here.
It is to be noted, control system of the present utility model not only can be applied on the gas ring, other use the household electric appliance of solenoid valve as switch gear, for example electromagnetic stove, range hood etc. all can be used control system of the present utility model, similarly, the method for work of control system of the present utility model also should not be subjected to the restriction of the description in the Chinese invention patent application 200910031364.5.
Claims (4)
1. the control system of the solenoid valve of household electric appliance, it comprises the switch of the electric current that is used for control electromagnetic valve, whether detecting switch exists the controller of fault, and be used for the safety detection circuit whether monitor controller exists fault, it is characterized in that this safety detection circuit comprises the filter element that the ripple that allows special frequency channel passes through.
2. the control system of the solenoid valve of household electric appliance as claimed in claim 1 is characterized in that: described filter element comprises high-pass filter and the low-pass filter that cascade connects.
3. the control system of the solenoid valve of household electric appliance as claimed in claim 1, it is characterized in that: described filter element comprises band-pass filter.
4. as the control system of the solenoid valve of any described household electric appliance of claim 1 to 3, it is characterized in that: described household electric appliance are gas cookers, this gas cooker comprises can manually operated stopcock, the current drives solenoid valve that cooperates with stopcock, be used to receive the burner of fuel gas flow, and the igniter that is used for the ignition combustion device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202554514U CN201554926U (en) | 2009-11-16 | 2009-11-16 | System for controlling solenoid valve of household appliance |
| PCT/EP2010/067438 WO2011058159A2 (en) | 2009-11-16 | 2010-11-15 | Control system for a solenoid valve of a domestic appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202554514U CN201554926U (en) | 2009-11-16 | 2009-11-16 | System for controlling solenoid valve of household appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201554926U true CN201554926U (en) | 2010-08-18 |
Family
ID=42614608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202554514U Expired - Lifetime CN201554926U (en) | 2009-11-16 | 2009-11-16 | System for controlling solenoid valve of household appliance |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201554926U (en) |
| WO (1) | WO2011058159A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734550A (en) * | 2012-06-08 | 2012-10-17 | 绍兴文理学院 | Intelligent hydraulic valve capable of detecting and repairing chucking fault |
| CN107656484A (en) * | 2017-11-15 | 2018-02-02 | 巢湖学院 | A kind of safe setting circuit of hardware watchdog |
| TWI718926B (en) * | 2020-04-09 | 2021-02-11 | 台達電子工業股份有限公司 | Detection circuit, detection method and uninterruptible power system using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021126553A1 (en) | 2021-10-13 | 2023-04-13 | Ebm-Papst Landshut Gmbh | Process for safety-related control |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3419752B2 (en) * | 2000-10-19 | 2003-06-23 | アール・ビー・コントロールズ株式会社 | Combustion control device |
| US7229278B1 (en) * | 2001-01-25 | 2007-06-12 | Carlin Combustion Technology, Inc. | Flame quality and fuel consumption monitoring methods for operating a primary burner |
| EP1373800B1 (en) * | 2001-03-26 | 2006-02-22 | Sit la Precisa S.p.a. | Control and safety device for valve means |
| US6877462B2 (en) * | 2003-01-09 | 2005-04-12 | Honeywell International Inc. | Sensorless flammable vapor protection and method |
| DE102006008475A1 (en) * | 2006-02-23 | 2007-08-30 | Siemens Building Technologies Hvac Products Gmbh | Method for the safety-related control of an actuator |
-
2009
- 2009-11-16 CN CN2009202554514U patent/CN201554926U/en not_active Expired - Lifetime
-
2010
- 2010-11-15 WO PCT/EP2010/067438 patent/WO2011058159A2/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734550A (en) * | 2012-06-08 | 2012-10-17 | 绍兴文理学院 | Intelligent hydraulic valve capable of detecting and repairing chucking fault |
| CN102734550B (en) * | 2012-06-08 | 2014-04-16 | 绍兴文理学院 | Intelligent hydraulic valve capable of detecting and repairing chucking fault |
| CN107656484A (en) * | 2017-11-15 | 2018-02-02 | 巢湖学院 | A kind of safe setting circuit of hardware watchdog |
| CN107656484B (en) * | 2017-11-15 | 2023-09-26 | 巢湖学院 | Hardware watchdog safety setting circuit |
| TWI718926B (en) * | 2020-04-09 | 2021-02-11 | 台達電子工業股份有限公司 | Detection circuit, detection method and uninterruptible power system using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011058159A3 (en) | 2011-07-07 |
| WO2011058159A2 (en) | 2011-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Hui Inventor after: Wang Qiang Inventor after: Lu Ye Inventor after: Pan Bangyan Inventor after: Wang Yichang Inventor before: Wang Hui Inventor before: Wang Qiang Inventor before: Lu Ye |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG HUI WANG QIANG LU YE TO: WANG HUI WANG QIANG LU YE PAN BANGYAN WANG YICHANG |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100818 |