IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0499215
(2006-08-04)
|
등록번호 |
US-7806683
(2010-10-26)
|
발명자
/ 주소 |
- Mitxelena, José María
- Mujika, Jokin
- Lasa, José María
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
10 |
초록
▼
A safety valve supply circuit for the ignition of a gas burner is disclosed. Said safety valve is directly supplied by a flame-detecting thermocouple, and said supply circuit comprises a supply capacitor that is charged from an alternating mains voltage, obtaining from the energy accumulated in said
A safety valve supply circuit for the ignition of a gas burner is disclosed. Said safety valve is directly supplied by a flame-detecting thermocouple, and said supply circuit comprises a supply capacitor that is charged from an alternating mains voltage, obtaining from the energy accumulated in said supply capacitor, due to said charging, an input voltage signal that is used to temporarily supply said safety valve in order to maintain it open. Said charging of the supply capacitor is carried out by momentarily activating a supply switch to temporarily connect said supply capacitor to said alternating mains voltage, said supply switch activation occurring concurrently with the activation of the gas burner. Said supply circuit also comprises conditioning means for converting said input voltage signal into an output voltage signal that is directly applied to said safety valve to supply it, and so maintain it open.
대표청구항
▼
What is claimed is: 1. A safety valve supply circuit for the ignition of a gas burner, said safety valve being directly supplied by a flame-detecting thermocouple, said supply circuit comprising a supply capacitor that is charged from an alternating mains voltage, obtaining from the energy accumula
What is claimed is: 1. A safety valve supply circuit for the ignition of a gas burner, said safety valve being directly supplied by a flame-detecting thermocouple, said supply circuit comprising a supply capacitor that is charged from an alternating mains voltage, obtaining from the energy accumulated in said supply capacitor, due to said charging, an input voltage signal that is used to temporarily supply said safety valve in order to maintain it open, said charging of the supply capacitor being carried out by momentarily activating a supply switch to temporarily connect the supply capacitor to said alternating mains voltage, said supply switch activation occurring concurrently with the activation of the gas burner, and said supply circuit also comprising conditioning means for converting said input voltage signal into an output voltage signal that is directly applied to said safety valve to supply it, and so maintain it open. 2. The supply circuit according to claim 1, wherein the supply capacitor is always connected to the conditioning means. 3. The supply circuit according to claim 1, wherein the conditioning means comprise a transformer, the input voltage signal being the input signal of said transformer and the output voltage signal being obtained from the output signal of said transformer, and said supply circuit comprises control means with a control switch disposed in series with said transformer, said control means generating an operating signal that can open said control switch to prevent a forward current from circulating through the primary of said transformer during determined time intervals as the charge of the supply capacitor decreases, so that, by means of said opening, said control means can control the value of the output voltage signal, in order to supply the safety valve a substantially constant energy. 4. The supply circuit according to claim 3, wherein the control means comprise detection means that can detect the forward current through the primary of the transformer, said control means causing the opening of the control switch with the operating signal, when said detection means detect that said forward current has reached a specific value. 5. The supply circuit according to claim 3, wherein the control switch comprises a transistor, causing said transistor to stop directing when the forward current has reached said specific value. 6. The supply circuit according to claim 4, wherein the operating signal is a squared signal of variable frequency and the time intervals correspond with the negative pulses of said squared signal, the positive pulse of said squared signal being completed when the detection means detect that the forward current has reached the specific value thereby opening the control switch, the duration of said positive pulses being greater as the charge of the supply capacitor decreases. 7. A power supply circuit for a solenoid gas safety valve of a gas burner comprising: a flame-detecting and voltage producing thermocouple electrically coupled to the solenoid of a solenoid gas safety valve and adapted to produce a voltage sufficient to cause the solenoid to hold the safety valve in an open position when the thermocouple is at a designated temperature, a supply capacitor connectable to an alternating mains voltage source via a switch when the switch is in a first position and connected to the solenoid and not the alternating mains voltage source when the switch is in a second position, a transformer electrically disposed in series between the solenoid and the capacitor when the switch is in the second position and adapted to receive an input voltage from the capacitor and to produce an output voltage which is sufficient to cause the solenoid to hold the safety valve in the open position. 8. A power supply circuit according to claim 7, wherein the transformer is directly connected to the solenoid. 9. A power supply circuit according to claim 7, wherein the storage capacity of the capacitor is sufficient to cause the solenoid to hold the safety valve in the open position for a period of time sufficient for the thermocouple to reach the designated temperature. 10. A power supply circuit according to claim 7, wherein the switch is configured to momentarily move to the first position concurrently with an activation of the gas burner and then to subsequently move to the second position. 11. A power supply circuit according to claim 7 further comprising a rectifier positioned electrically in series between the alternating mains voltage source and the capacitor when the switch is in the first position. 12. A power supply circuit according to claim 7, wherein the transformer comprises a primary winding and a secondary winding, the power supply circuit further comprising a control circuit coupled to the primary winding that is configured to act on the primary winding to control the output voltage of the transformer so that it remains substantially constant during a period of time when the charge of the capacitor is decreasing. 13. A power supply circuit according to claim 12 further comprising a rectifier positioned electrically in series between the alternating mains voltage source and the capacitor when the switch is in the first position, the control circuit and rectifier electrically coupled so that the rectifier provides a DC power voltage to the control circuit. 14. A power supply circuit according to claim 7 further comprising a rectifier block disposed between the transformer and the solenoid. 15. A safety valve supply circuit for the ignition of a gas burner, said safety valve being directly supplied by a flame-detecting thermocouple, said supply circuit comprising a supply capacitor that is charged from an alternating mains voltage, obtaining from the energy accumulated in said supply capacitor, due to said charging, an input voltage signal that is used to temporarily supply said safety valve in order to maintain it open, said charging of the supply capacitor being carried out by momentarily activating a supply switch to temporarily connect the supply capacitor to said alternating mains voltage, said supply switch activation occurring concurrently with the activation of the gas burner, and said supply circuit also comprising conditioning means for converting said input voltage signal into an output voltage signal that is directly applied to said safety valve to supply it, and so maintain it open, the conditioning means comprising a transformer, the input voltage signal being the input signal of said transformer and the output voltage signal being obtained from the output signal of said transformer, and said supply circuit comprising control means with a control switch disposed in series with said transformer, said control means generating an operating signal that can open said control switch to prevent a forward current from circulating through the primary of said transformer during determined time intervals as the charge of the supply capacitor decreases, so that, by means of said opening, said control means can control the value of the output voltage signal, in order to supply the safety valve a substantially constant energy. 16. The supply circuit according to claim 15, wherein the control means comprise detection means that can detect the forward current through the primary of the transformer, said control means causing the opening of the control switch with the operating signal, when said detection means detect that said forward current has reached a specific value. 17. The supply circuit according to claim 15, wherein the control switch comprises a transistor, causing said transistor to stop directing when the forward current has reached said specific value. 18. The supply circuit according to claim 16, wherein the operating signal is a squared signal of variable frequency and the time intervals correspond with the negative pulses of said squared signal, the positive pulse of said squared signal being completed when the detection means detect that the forward current has reached the specific value thereby opening the control switch, the duration of said positive pulses being greater as the charge of the supply capacitor decreases.
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