EP2246626A1 - Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür - Google Patents

Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür Download PDF

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Publication number
EP2246626A1
EP2246626A1 EP09159205A EP09159205A EP2246626A1 EP 2246626 A1 EP2246626 A1 EP 2246626A1 EP 09159205 A EP09159205 A EP 09159205A EP 09159205 A EP09159205 A EP 09159205A EP 2246626 A1 EP2246626 A1 EP 2246626A1
Authority
EP
European Patent Office
Prior art keywords
solenoid valve
time
ignition
default time
valve
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.)
Withdrawn
Application number
EP09159205A
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English (en)
French (fr)
Inventor
Kuan-Jung Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guard Sound Industry Co Ltd
Original Assignee
Guard Sound Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guard Sound Industry Co Ltd filed Critical Guard Sound Industry Co Ltd
Priority to EP09159205A priority Critical patent/EP2246626A1/de
Publication of EP2246626A1 publication Critical patent/EP2246626A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/12—Fail safe for ignition failures
    • 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
    • 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

Definitions

  • the present invention generally relates to a solenoid valve controlling circuit and a controlling method thereof; in particular, to a solenoid valve controlling circuit that is used to control the opening and closing of a solenoid valve in a gas geyser and a controlling method thereof.
  • a solenoid valve is a type of valve used to control the flow of the gas supply.
  • current solenoid valves provide a multi-stage valve design, and through sequential open-close actions in such a multi-stage valve design, it is possible to allow an initial supply of a lesser amount of gas and then allowing a subsequent release of massive gas flow.
  • various configurations in the design of multi-stage value can be found, and herein are conjunctively referred as the multi-stage valve, particularly with regards to the multi-stage valve that enables sequential gas flow regulation function.
  • the multi-stage valve in the solenoid valve is of a condition of having a smaller opening to the valve, thereby allowing the ignition to occur with a small amount of gas, and thus preventing massive gas supply at an early stage which may cause dangerous gas explosion, and this also effectively saves more gas.
  • the multi-stage valve in the solenoid valve gradually changes to a condition of having a greater opening to the valve in order to supply sufficient amount of gas for heating. Therefore, by means of the multi-stage valve design, the solenoid valve can smoothly and appropriately control gas supply therein, thus preventing the drawbacks of insufficient gas supply or excessive gas supply, thereby further enabling successful fire ignition and stable combustion, and also increases safety in operation.
  • the multi-stage valve in the solenoid valve is a type of mechanical switch, which in operation controls the attraction and release of the valve through magnetic field generated by power reception of the solenoid valve, thereby allowing the opening of the valve to sequentially change from fully closed at the beginning to fully open, thus the amount of gas guided thereto increases from small to massive. Accordingly, there is one problem existing in such a design, such that when the multi-stage valve of the solenoid valve has entered into a higher, or even fully, open condition, suppose the geyser continues to generate sparks because of unsuccessful ignition, at this moment, due to massive supply of gas, it is possible to cause dangerous gas explosion. As a result, the control feature of solenoid valve in the current gas geyser still needs to be improved.
  • the technical problems that the present invention is directed to resolve entails the specifying of the power supply duration time for the solenoid valve based on the specification of the multi-stage valve in the solenoid valve, thereby forming a discontinuous gas supply.
  • the technical problems that the present invention is directed to resolve entails the specifying of the power supply duration time for the solenoid valve based on the specification of the multi-stage valve in the solenoid valve, thereby forming a discontinuous gas supply.
  • a solenoid valve controlling circuit in which the solenoid valve is a multi-stage valve, and the opening of the multi-stage valve from fully closed to fully open requires a preset duration in time
  • the solenoid valve controlling circuit comprising: an ignition circuit, a fire sensing circuit, and a switch controlling unit.
  • the ignition circuit receives a current signal for ignition
  • the fire sensing circuit is connected to the ignition circuit and outputs a sensing signal based on the ignition condition of the ignition circuit.
  • the switch controlling unit receives the current signal to count up to a first default time, and controls the providing of a power supply to the solenoid valve so as to sequentially open the multi-stage valve for gas guidance.
  • the switch controlling unit When the provision time of the power supply to the solenoid valve by the switch controlling unit has reached the first default time, it is then determined whether or not to continue the power supply to the solenoid valve based on the sensing signal. If the sensing signal indicates an extinguishing state, then the switch controlling unit interrupts the power supply to the solenoid valve, allowing the opening of the multi-stage valve to be fully closed, and after the interruption time of the power supply reaches a second default time, the power supply will be resumed and a re-count up to the first default time begins. Furthermore, the sum of the first default time and the second default time is smaller than the preset time. In this way, the ignition circuit can be ensured to ignite while remaining in a condition of having lesser amount of gas supply.
  • the controlling method for the solenoid valve comprising the following steps: initially, proceeding an ignition procedure for controlling and providing a power supply to the solenoid valve and counting up to a first default time; when the provision time of the power supply to the solenoid valve has reached the first default time, then determining the state of the ignition according to a sensing signal. If it is determined that the sensing signal indicates an extinguishing state, then interrupting the power supply to the solenoid valve.
  • the solenoid valve can ensure that ignition occurs under the condition of lesser amount of gas supply.
  • the effects that the present invention can provide are that, when the geyser engages in an ignition procedure, the valve of the multi-stage valve in the solenoid valve may not reach a condition of having a greater opening to the valve, nor reach a condition of having a fully opened valve. Thereby in case the ignition procedure should fail, it is possible to prevent massive gas supply which may cause gas explosion, further enhancing the safety in use of gas geyser.
  • Figure 1 is a block diagram of an embodiment for a solenoid valve controlling circuit according to the present invention
  • Figure 2 is a circuit diagram of an embodiment for the solenoid valve controlling circuit according to the present invention.
  • Figure 3 is a comparison diagram of an embodiment of a preset time and a default time of the solenoid valve controlling circuit
  • Figure 4 is a flowchart of an embodiment for the solenoid valve controlling method according to the present invention.
  • the present invention can be applied to a gas geyser, which can be used to control a solenoid valve having multi-stage valve, and is able to specify the duration of the power supply to the solenoid valve based on the multi-stage valve specification, so as to enable discontinuous gas supply that is safer than the traditional way of continuous gas supply. Accordingly, when the geyser is igniting during the ignition procedure, the present invention allows the geyser to be maintained in a condition of having lesser gas supply.
  • the multi-stage valve of the solenoid valve takes the design of a two-stage valve (including a first-stage valve and a second-stage valve) as an example.
  • the first-stage valve is a smaller valve which is used to guide in lesser amount of gas when being maintained in an open state;
  • the second-stage valve is a bigger valve which is used to guide in greater amount of gas when being maintained in an open state.
  • the multi-stage valve is controlled to sequentially go from an initial state of "fully closed”, to a state of "first-stage valve open”, then to a final state of "second-stage valve open” (i.e. "fully open"), and the duration from the fully closed state to the fully open state requires a preset time, which may vary in accordance with different actual structure designs.
  • the present invention designs the time duration (i.e. provision time) of power supply to the solenoid valve on basis of the preset time.
  • FIG. 1 a block diagram and a circuit diagram of an embodiment for the solenoid valve controlling circuit according to the present invention are respectively shown.
  • the present embodiment provides a solenoid valve controlling circuit 1 that is used to control a solenoid valve 2 having a multi-stage valve 21.
  • the solenoid valve controlling circuit 1 comprising: a total ignition timer unit 11, an ignition circuit 12, a fire sensing circuit 13, and a switch controlling unit 14.
  • the circuit diagram shown in Figure 2 discloses simply one of possible embodiments applicable to implement the solenoid valve controlling circuit 1, wherein the total ignition timer unit 11, the ignition circuit 12, and the fire sensing circuit 13 may be designed according to the logical circuit architecture illustrated as Figure 2 , and those skilled in the art can appreciate the principles thereof and make numerous alternations or changes for implementation; while regarding to the switch controlling unit 14, it is possible to be directly designed as a single chip controller for enabling time sequence logic control.
  • the total ignition timer unit 11 is connected to a micro motion switch 3 on the gas geyser, so that, when a user turns on the faucet of hot water, the micro motion switch 3 becomes conductive because of water flow, thereby being driven to generate a start signal. Then the total ignition timer unit 11 receives the start signal and proceeds with an ignition procedure and begins to count up to a total ignition time. At this moment, the total ignition timer unit 11 outputs a current signal during the presently counted total ignition time.
  • the ignition circuit 12 is connected to the total ignition timer unit 11 and receives the current signal to perform high voltage discharge ignition. In other words, the ignition circuit 12 receives the current signal for consistent ignition operations during the total ignition time.
  • there are two points in time for turning ignition off in the ignition circuit 12 one of them occurs upon successful ignition of the ignition circuit 12 within the total ignition time, i.e. wherein turning ignition off is caused by the non-conductivity formed in the transistor Q4 of the ignition circuit 12 shown in Figure 2 ; while the other point occurs when the ignition of the ignition circuit 12 consistently fails within the total ignition time, so the output of the current signal stops due to completion of total ignition time count by the total ignition timer unit 11, thus the ignition operation of the ignition circuit 12 ends.
  • the total ignition time counted by the total ignition timer unit 11 is designed in accordance with the preset time of the multi-stage valve 21 in the solenoid valve 2. Generally speaking, the total ignition time is longer than the preset time.
  • the fire sensing circuit 13 is connected to the ignition circuit 12 and outputs a sensing signal in real time according to the ignition state of the ignition circuit 12. Hence, if the ignition is successful in the ignition circuit 12, then the sensing signal outputted by the fire sensing circuit 13 indicates a combustion state. Contrarily, should the ignition of the ignition circuit 12 be unsuccessful, the sensing signal outputted by the fire sensing circuit 13 indicates an extinguishing state.
  • the switch controlling unit 14 is connected to the total ignition timer unit 11 and the fire sensing circuit 13, which counts up to a first default time after reception of the current signal outputted by the total ignition timer unit 11, and starts to control and provide the power supply to the solenoid valve 2, such that the solenoid valve 2 sequentially opens the multi-stage valve 21 to guide in the gas.
  • the fire sensing circuit 13 consequently detects whether or not the ignition is successful.
  • the switch controlling unit 14 interrupts power supply to the solenoid valve 2, so the solenoid valve 2 can not receive the current signal due to interrupted control of the switch controlling unit 14, the opening of the multi-stage valve 21 will return to being fully closed, thus there is no more gas supply. Also, at the same time as the switch controlling unit 14 interrupts the power supply to the solenoid valve 2, it starts to count up to a second default time such that the switch controlling unit 14 may not resume the provision of the power supply to the solenoid valve 2 until the duration of interrupted power supply (i.e. interruption time for providing the power supply) reaches the second default time, then it recounts up to the first default time, thereby further allowing the multi-stage valve 21 to guide in the gas again.
  • interrupted power supply i.e. interruption time for providing the power supply
  • the sum of the first default time and the second default time in the present embodiment is designed to be less than the preset time of the multi-stage valve 21.
  • the more desirable configuration is to design the sum of the first default time and the second default time to be the duration of time required before opening the second-stage valve, that is, the time in which the first-stage valve is kept to be open, so as to achieve the objective of maintaining lesser amount of gas supply.
  • Figure 3 wherein a comparison diagram for the embodiment of the preset time and the default time is shown.
  • the preset time of the two-stage valve in the solenoid valve 2 is 7 seconds, wherein the duration in which the first-stage valve is kept open is 4 seconds, and the duration in which the second-stage valve is kept open is 3 seconds. As such, the duration required before the two-stage valve opens to the second-stage valve is 4 seconds.
  • the second default time is a counting time for interrupting the provision of the power supply, so it may be designed to be less, as shown in Figure 3 , in which the first default time is designed to be 3 seconds and the second default time is designed to be 1 second.
  • the switch controlling unit 14 controls and provides the power supply to the solenoid valve 2 has reached 3 seconds, it then determines whether or not the provision of the power supply should continue based on the sensing signal.
  • the switch controlling unit 14 interrupts the provision of the power supply for 1 seconds, then restarts the provision of the power supply and recounts up to 3 seconds to repeat the operation, afterward it resumes the fully closed state (off for 1 second), and then further restarts the operation, thus performing the entire procedure iteratively.
  • the two-stage valve of the solenoid valve 2 may control the first-stage valve to repetitively releasing small amount of gas, preventing massive amount of gas from entering through the opening of the second-stage valve, thereby increasing the ignition safety of the ignition circuit 12.
  • the total ignition time that the aforementioned total ignition timer unit 11 counts up to is longer than the preset time.
  • the total ignition time may be further designed to be multiple values of the sum of the first default time and the second default time, allowing the solenoid valve controlling circuit 1 of the present embodiment to repeat on/off operations of the solenoid valve 2 several times within the total ignition time. For example, suppose the total ignition time is 8 seconds, i.e. twice as long as the sum (4 seconds) of the first default time and the second default time. Therefore, in case of ignition failure in the ignition circuit 12, the switch controlling unit 14 can control twice on/off operations of the solenoid valve.
  • the aforementioned situations that have been illustrated are all ignition failure in the ignition circuit 12.
  • the switch controlling unit 14 controls and provides the power supply to the solenoid valve 2 reaches the first default time and the received sensing signal indicates the combustion state, representing successful ignition in the ignition circuit 12, then the switch controlling unit 14 continues to provide the power supply directly to the solenoid valve 2.
  • the ignition circuit 12 automatically stops high voltage discharge operation as well.
  • the switch controlling unit 14 may further comprise: a first timer unit 141 and a second timer unit 142.
  • the first timer unit 141 is connected to the total ignition timer unit 11 and uses electronic circuits to design the first default time for receiving the current signal to count up to the first default time.
  • the electronic circuits therein can be designed by simply using, for example, the resistance/capacitance (RC) circuit.
  • the second timer unit 142 is connected to the first timer unit 141 and similarly uses electronic circuits to design the second default time, so as to initiate counting of the second default time when the sensing signal received by the switch controlling unit 14 indicates the extinguishing state.
  • the present embodiment provides a controlling method for solenoid valve, comprising the following steps: initially, when a user turns the faucet of hot water, the gas geyser starts an ignition procedure, at this moment, the total ignition timer unit begins to count up to a total ignition time (S401). Furthermore, the switch controlling unit controls and provides a power supply to the solenoid valve and also starts to count up to a first default time (S403). Next, it determines whether or not the time (i.e. provision time) in which the switch controlling unit controls and provides the power supply has reached the first default time (S405).
  • step S405 If the determination in step S405 is negative, meaning the count for the provision time has not yet reached the first default time, and then the switch controlling unit continues the counting up of the first default time and continues to provide the power supply to the solenoid valve, accordingly repeating the determination operation in step (S405).
  • the switch controlling unit receives a sensing signal outputted from a fire sensing circuit by checking an ignition circuit, in order to determine whether or not the sensing signal indicates the combustion state (S407).
  • step (S407) Suppose the determination in step (S407) is positive, this means successful ignition in the ignition circuit and the sensing signal indicates the combustion state. As such, the ignition procedure of the gas geyser can be accomplished, and the switch controlling unit continues the provision of the power supply to the solenoid valve for gas combustion (S409). Contrarily, if the determination in step (S407) is negative, meaning ignition in the ignition circuit is not yet successful, so that the sensing signal indicates the extinguishing state. As such, the switch controlling unit interrupts the provision of the power supply to the solenoid valve and starts to count up to the second default time (S411). Next, the switch controlling unit determines whether or not the time (i.e. interruption time) for the power supply interruption has reached the second default time (S413).
  • the time i.e. interruption time
  • step (S413) If the determination in step (S413) is no, meaning the count has not yet reached the second default time, then the switch controlling unit continues to count up to the second default time and continues the interruption of the power supply provision to the solenoid valve, then further repeating the determination in step (S413). However, if the determination in step (S413) is positive, indicating the time in which the switch controlling unit interrupts the provision of the power supply to the solenoid valve reaches the second default time, so then it further determines whether or not the time of the entire ignition procedure has reached the total ignition time (S415).
  • step (S415) In case the determination in step (S415) is no, representing that the ignition procedure is still undergoing, the switch controlling unit then repeats the step (S403) to resume power supply to the solenoid valve and recounts up to the first default time.
  • step (S415) turns out to be positive, meaning the total ignition time counted by the total ignition timer unit is up, whereas at this moment the ignition circuit has not yet completed ignition operation successfully, seeing that excessively long ignition time may cause unwanted risks, hence the entire ignition procedure ends accordingly (S417).
  • step (S401) the controlling method of solenoid valve according to the present invention can be completed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Control Of Combustion (AREA)
EP09159205A 2009-04-30 2009-04-30 Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür Withdrawn EP2246626A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09159205A EP2246626A1 (de) 2009-04-30 2009-04-30 Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09159205A EP2246626A1 (de) 2009-04-30 2009-04-30 Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür

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EP2246626A1 true EP2246626A1 (de) 2010-11-03

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EP09159205A Withdrawn EP2246626A1 (de) 2009-04-30 2009-04-30 Steuerungsschaltung für Magnetventil und Steuerungsverfahren dafür

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013141689A1 (en) * 2012-03-19 2013-09-26 Bgs Engineering Sdn. Bhd. Gas operation time-out system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074713A (en) * 1980-04-23 1981-11-04 British Gas Corp Spark ignition
US5026270A (en) * 1990-08-17 1991-06-25 Honeywell Inc. Microcontroller and system for controlling trial times in a furnace system
US5035607A (en) * 1990-10-22 1991-07-30 Honeywell Inc. Fuel burner having an intermittent pilot with pre-ignition testing
DE10148642A1 (de) * 2001-10-02 2003-04-30 Robert Seuffer Gmbh & Co Kg Vorrichtung zum Bedienen eines oder mehrerer Gasbrenner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074713A (en) * 1980-04-23 1981-11-04 British Gas Corp Spark ignition
US5026270A (en) * 1990-08-17 1991-06-25 Honeywell Inc. Microcontroller and system for controlling trial times in a furnace system
US5035607A (en) * 1990-10-22 1991-07-30 Honeywell Inc. Fuel burner having an intermittent pilot with pre-ignition testing
DE10148642A1 (de) * 2001-10-02 2003-04-30 Robert Seuffer Gmbh & Co Kg Vorrichtung zum Bedienen eines oder mehrerer Gasbrenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013141689A1 (en) * 2012-03-19 2013-09-26 Bgs Engineering Sdn. Bhd. Gas operation time-out system

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