CN110762272A - Gas valve power supply control circuit and gas system - Google Patents
Gas valve power supply control circuit and gas system Download PDFInfo
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- CN110762272A CN110762272A CN201910992208.9A CN201910992208A CN110762272A CN 110762272 A CN110762272 A CN 110762272A CN 201910992208 A CN201910992208 A CN 201910992208A CN 110762272 A CN110762272 A CN 110762272A
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- 238000001514 detection method Methods 0.000 claims abstract description 53
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 198
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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Abstract
The invention provides a gas valve power supply control circuit and a gas system, wherein the gas valve power supply control circuit comprises: the ignition circuit comprises a driving chip and a controlled switch, wherein the input end of the driving chip is externally connected with a level signal, the output end of the driving chip is connected with the control end of the controlled switch and is used for generating a driving signal to control the switching state of the controlled switch according to the level signal, and the level signal comprises an ignition detection signal and an ignition control signal; the first end of the controlled switch is externally connected with a power supply, the second end of the controlled switch is connected with a power supply end of the gas valve, and the controlled switch controls the external power supply to supply power to the gas valve. Thereby through not receiving at driver chip and examining the fire signal promptly not have the flame burning and do not detect the ignition control signal promptly not when the operation of igniteing, turn-off through control controlled switch to thereby cut off the power supply of gas valve and make the gas valve close, and then avoided the gas valve to continue to open under the condition that the gas does not have normal use and cause the potential safety hazard that the gas was revealed, and more energy-concerving and environment-protective, the waste of the reduction energy.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a power supply control circuit of a gas valve and a gas system.
Background
With the continuous improvement of living standard and environmental protection consciousness of people, natural gas, which is a clean energy source, is more and more widely applied to daily life of people. Household appliances that are often used in daily life are for example: the natural gas applying devices such as a gas stove, a gas water heater and the like can form a set of gas system, the gas system comprises a gas valve, and after the gas valve is opened, gas can be provided for flame generated by the gas device to maintain combustion.
In prior art, when the condition that flame accident extinguishes appears in the use as gas equipment, if do not in time discover and close the gas valve power through the manual work, the gas valve will still keep the open mode, can make the gas supply always but not burnt, and the gas that does not get burnt finally can reveal in the external environment from gas system to cause the potential safety hazard that the gas was revealed.
Disclosure of Invention
In view of this, the embodiment of the invention provides a power supply control circuit for a gas valve and a gas system, so as to solve the problem that when flame is accidentally extinguished, if not found in time, gas is easily leaked to the outside, which causes potential safety hazard of gas leakage.
According to a first aspect, an embodiment of the present invention provides a gas valve power supply control circuit, including: the ignition circuit comprises a driving chip and a controlled switch, wherein the input end of the driving chip is externally connected with a level signal, the output end of the driving chip is connected with the control end of the controlled switch and is used for generating a driving signal according to the level signal to control the switching state of the controlled switch, and the level signal comprises an ignition detection signal and an ignition control signal; the first end of the controlled switch is externally connected with a power supply, and the second end of the controlled switch is connected with a power supply end of the gas valve and used for controlling the external power supply to supply power to the gas valve.
Optionally, the gas valve power supply control circuit further comprises: the ignition circuit comprises a first diode and a second diode, wherein the positive end of the first diode is externally connected with the ignition detection signal, and the reverse end of the first diode is connected with the input end of the driving chip; and the positive end of the second diode is externally connected with the ignition control signal, and the negative end of the second diode is connected with the input end of the driving chip.
Optionally, the gas valve power supply control circuit further comprises: and one end of the first resistor is connected with the output end of the driving chip, and the other end of the first resistor is connected with the first end of the controlled switch.
Optionally, the gas valve power supply control circuit further comprises: and one end of the second resistor is connected with the output end of the driving chip, and the other end of the second resistor is connected with the control end of the controlled switch.
Optionally, the gas valve power supply control circuit further comprises: and one end of the filter capacitor is connected with the power end of the driving chip, and the other end of the filter capacitor is connected with the grounding end of the driving chip.
Optionally, the driving chip is an ULN2003A integrated circuit chip.
Optionally, the controlled switch is a transistor.
Optionally, the controlled switch is a PNP transistor.
According to a second aspect, an embodiment of the present invention further provides a gas system, which is characterized by including: a gas valve, a fire detection circuit, a controller, a gas valve control circuit, and the gas valve power supply control circuit of the first aspect and any one of its optional embodiments, wherein an output of the fire detection circuit is connected to a first input of the gas valve power supply control circuit for detecting a flame to output a fire detection signal; the input end of the controller is externally connected with an ignition operation signal of a user, and the output end of the controller is respectively connected with the first input end of the gas valve power supply control circuit and the gas valve control circuit and used for generating an ignition control signal according to the ignition operation signal; the output end of the gas valve control circuit is connected with the control end of the gas valve and is used for controlling the gas valve to work according to the ignition control signal; the second input end of the gas valve power supply control circuit is externally connected with a power supply, and the output end of the gas valve power supply control circuit is connected with the power supply end of the gas valve and used for receiving the fire detection signal and the ignition control signal and controlling the external power supply to supply power to the gas valve according to the fire detection signal and the ignition control signal.
Optionally, when the fire detection signal or the ignition control signal is a high-level signal, the gas valve power supply control circuit is connected with the external power supply and the gas valve to supply power to the gas valve; when the fire detection signal and the ignition control signal are low level signals, the gas valve power supply control circuit disconnects the external power supply from the gas valve, and the gas valve stops supplying power.
The technical scheme of the invention has the following advantages:
1. the embodiment of the invention provides a power supply control circuit of a gas valve, which comprises: the ignition circuit comprises a driving chip and a controlled switch, wherein the input end of the driving chip is externally connected with a level signal, the output end of the driving chip is connected with the control end of the controlled switch and is used for generating a driving signal to control the switching state of the controlled switch according to the level signal, and the level signal comprises an ignition detection signal and an ignition control signal; the first end of the controlled switch is externally connected with a power supply, and the second end of the controlled switch is connected with a power supply end of the gas valve and used for controlling the external power supply to supply power to the gas valve. Thereby through not receiving at driver chip and examining the fire signal promptly not have the flame burning and do not detect the ignition control signal promptly not when the operation of igniteing, turn-off through control controlled switch to thereby cut off the power supply of gas valve and make the gas valve close, and then avoided the gas valve to continue to open under the condition that the gas does not have normal use and cause the potential safety hazard that the gas was revealed, and more energy-concerving and environment-protective, the waste of the reduction energy.
2. The embodiment of the invention provides a gas system, which comprises: the gas valve power supply control circuit comprises a gas valve, a fire detection circuit, a controller, a gas valve control circuit and a gas valve power supply control circuit provided by another embodiment of the invention, wherein the output end of the fire detection circuit is connected with the first input end of the gas valve power supply control circuit and is used for detecting flame to output a fire detection signal; the input end of the controller is externally connected with an ignition operation signal of a user, and the output end of the controller is respectively connected with the first input end of the gas valve power supply control circuit and the gas valve control circuit and used for generating an ignition control signal according to the ignition operation signal; the output end of the gas valve control circuit is connected with the control end of the gas valve and is used for controlling the gas valve to work according to the ignition control signal; the second input end of the gas valve power supply control circuit is externally connected with a power supply, and the output end of the gas valve power supply control circuit is connected with the power supply end of a gas valve and used for receiving the ignition detection signal and the ignition control signal and controlling the externally connected power supply to supply power to the gas valve according to the ignition detection signal and the ignition control signal. The potential safety hazard that causes the gas to reveal is avoided the gas valve to continue to open under the condition that the gas does not have normal use through gas valve power control circuit, has improved this gas system's security to it is energy-concerving and environment-protective more, the waste of the reduction energy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a gas valve power supply control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gas system according to an embodiment of the present invention;
FIG. 3A is a schematic diagram of the operation of the gas system according to the embodiment of the present invention;
FIG. 3B is a schematic view of another operation process of the gas system according to the embodiment of the present invention;
fig. 3C is another schematic diagram of the operation process of the gas system according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
It should be noted that the power control circuit for a gas valve provided in the embodiment of the present invention may be applied to various gas devices that require gas to be burned for operation, such as a gas stove and a gas water heater, and the present invention is not limited thereto.
Fig. 1 shows a schematic configuration diagram of a gas valve power supply control circuit, which includes, as shown in fig. 1: the drive circuit comprises a drive chip U1 and a controlled switch Q1, wherein the input end of the drive chip U1 is externally connected with a level signal, the output end of the drive chip U1 is connected with the control end of the controlled switch Q1 and is used for generating a drive signal to control the switching state of the controlled switch Q1 according to the level signal, and the level signal comprises an ignition detection signal and an ignition control signal; the first end of the controlled switch Q1 is externally connected with a power supply, and the second end is connected with the power supply end of the gas valve M and used for controlling the external power supply to supply power to the gas valve M. Specifically, the driving chip U1 in the embodiment of the present invention is an ULN2003A integrated circuit chip; in practical applications, the controlled switch Q1 is a transistor, and specifically, the controlled switch Q1 is a PNP transistor in the embodiment of the present invention; the external power supply is a 24V direct current power supply.
Specifically, the driving chip U1 is configured to convert an input low-voltage (0 to 5V) external level signal into a driving signal capable of controlling a high-voltage (24V) driving switch, when the external level signal is a high level signal, the driving signal output to the controlled switch Q1 is a low level signal, a current flows from an emitter to a base of the controlled switch Q1, the controlled switch Q1 is turned on, a power supply of the gas valve M supplies power to the gas valve M through a collector output, and the gas valve M can be turned on under the control of a corresponding control circuit; when the external level signal is a low level signal, the output of the driving chip U1 is in a high-impedance state, no current flows from the emitter to the base of the controlled switch Q1, the controlled switch Q1 is disconnected, the gas valve M cannot be powered, and the gas valve M is in a closed state no matter whether a control signal exists in a corresponding control circuit.
In practical application, the fire detection signal is output by a fire detection circuit, the fire detection circuit is used for detecting whether burning flames exist on the gas equipment, the fire detection signal output by the fire detection circuit is a high-level signal when the burning flames exist, and the fire detection signal output by the fire detection circuit is a low-level signal when the burning flames do not exist; the ignition control signal is output by a controller of the gas appliance, the controller is used for receiving an operation instruction of a user and generating an ignition control signal according to the operation instruction, the ignition control signal controls the gas valve M to open through a control circuit of the gas valve M, and the gas output performs an ignition operation, for example: when the gas equipment is a household gas stove, if a controller of the gas stove detects that a user rotates a knob switch on the gas stove, the generated ignition control signal is a high-level signal, the high-level signal is output to a gas valve power supply control circuit, namely the input end of a driving chip U1, and then an external power supply is controlled by the gas valve power supply control circuit to supply power to a gas valve M so as to control the gas valve M to be opened, and the gas is output for the user to ignite.
Specifically, in an embodiment, as shown in fig. 1, the gas valve power supply control circuit further includes: the circuit comprises a first diode D1 and a second diode D2, wherein the positive end of the first diode D1 is externally connected with a fire detection signal, and the reverse end of the first diode D1 is connected with the input end of a driving chip U1; the forward end of the second diode D2 is externally connected with an ignition control signal, and the reverse end is connected with the input end of the driving chip U1. In practical applications, the first diode D1 and the second diode D2 respectively input or together with the ignition detection signal and the ignition control signal to the 4 th pin terminal, which is the input terminal of the ULN2003A chip, by utilizing the forward-on and reverse-off characteristics of the diodes.
Specifically, in an embodiment, as shown in fig. 1, the gas valve power supply control circuit further includes: one end of a first resistor R1 is connected with the output end of the driving chip U1, and the other end of the first resistor R1 is respectively connected with the first end of a controlled switch Q1; and one end of a second resistor R2, and one end of a second resistor R2 is connected with the output end of the driving chip U1, and the other end of the second resistor R2 is connected with the control end of the controlled switch Q1. In practical applications, the first resistor R1 may be composed of one resistor or a plurality of resistors connected in series, and in the embodiment of the present invention, the example is described as an example of two resistors connected in series, and the second resistor R2 is used to limit the base current of the controlled switch Q1, so as to ensure that the controlled switch Q1 works safely and reliably; the first resistor R1 is a pull-up resistor, which ensures that the controlled switch Q1 is in an off state when the output of the driver chip U1 is in a high resistance state.
Specifically, in an embodiment, as shown in fig. 1, the gas valve power supply control circuit further includes: one end of the filter capacitor C1 and one end of the filter capacitor C1 are connected with the power supply end of the driving chip U1, and the other end of the filter capacitor C1 are connected with the grounding end of the driving chip U1. In practical applications, when the driving chip U1 is an ULN2003A integrated circuit chip, two ends of the filter capacitor C1 are respectively connected between the pin 8 and the pin 9 of the ULN2003A chip, so as to ensure the stability of the power supply of the chip, reduce the noise of the device coupled to the power supply terminal, and indirectly reduce the influence of the noise of other devices on the device.
The working principle and the working process of the power control circuit provided by the embodiment of the invention will be described in detail with reference to specific application examples.
As shown in the power supply control circuit of the gas valve in fig. 1, the level signal input to the driving chip U1 is an or signal of an ignition detection signal and an ignition control signal, the ignition control signal is a high level signal during ignition, and is a low level signal after a period of time delay; the fire detection signal is a high level signal when a flame is detected, and is a low level signal when no flame is detected. When one of the two level signals is a high level signal, the input signal to the driver chip U1 is a high level signal. When the level signal input to the driving chip U1 is at a high level, the controlled switch Q1 is switched on, an external 24V power supply supplies power to the gas valve M and the corresponding control thereof through the driving chip U1, and at the moment, the gas valve M can be opened according to the ignition control signal of the controller thereof; when the input level signal is a low level signal, the controlled switch Q1 is turned off, the gas valve M and the control circuit thereof are not powered, and at this time, no matter what ignition control signal is output by the controller, the gas valve M can be ensured to be in a closed state. When the gas valve is ignited or a flame is detected, the controlled switch Q1 is turned on, the gas valve M and its control circuit are powered, and the gas valve M can be controlled to open. Thereby through the control to gas valve M's power supply, and then control opening or closing of gas valve M, avoided gas valve M to continue to open under the condition that the gas does not have normal use and cause the potential safety hazard that the gas was revealed to it is more energy-concerving and environment-protective, the waste of the reduction energy.
Through the cooperation of the above components, the gas valve power supply control circuit provided by the embodiment of the invention comprises: the ignition circuit comprises a driving chip and a controlled switch, wherein the input end of the driving chip is externally connected with a level signal, the output end of the driving chip is connected with the control end of the controlled switch and is used for generating a driving signal to control the switching state of the controlled switch according to the level signal, and the level signal comprises an ignition detection signal and an ignition control signal; the first end of the controlled switch is externally connected with a power supply, and the second end of the controlled switch is connected with a power supply end of the gas valve and used for controlling the external power supply to supply power to the gas valve. Thereby through not receiving at driver chip and examining the fire signal promptly not have the flame burning and do not detect the ignition control signal promptly not when the operation of igniteing, turn-off through control controlled switch to thereby cut off the power supply of gas valve and make the gas valve close, and then avoided the gas valve to continue to open under the condition that the gas does not have normal use and cause the potential safety hazard that the gas was revealed, and more energy-concerving and environment-protective, the waste of the reduction energy.
An embodiment of the present invention further provides a gas system, as shown in fig. 2, the gas system includes: the flame detection device comprises a gas valve M, a flame detection circuit 1, a controller 2, a gas valve control circuit 3 and a gas valve power supply control circuit 4 provided by another embodiment of the invention, wherein the output end of the flame detection circuit 1 is connected with the first input end of the gas valve power supply control circuit 4 and is used for detecting flame to output a flame detection signal; the input end of the controller 2 is externally connected with an ignition operation signal of a user, and the output end of the controller is respectively connected with the first input end of the gas valve power supply control circuit 4 and the input end of the gas valve control circuit 3 and used for generating a control signal according to the ignition operation signal; the output end of the gas valve control circuit 3 is connected with the control end of the gas valve M and is used for controlling the gas valve M to work according to the ignition control signal; the second input end of the gas valve power supply control circuit 4 is externally connected with a power supply, and the output end of the gas valve power supply control circuit is connected with the power supply end of the gas valve M and used for receiving the ignition detection signal and the ignition control signal and controlling the externally connected power supply to supply power to the gas valve M according to the ignition detection signal and the ignition control signal. For the detailed description of the gas valve power supply control circuit 4, reference is made to the related contents of the gas valve power supply control circuit in the above embodiments, and the detailed description is omitted here. When the fire detection signal or the ignition control signal is a high level signal, the gas valve power supply control circuit 4 is connected with an external power supply and a gas valve M to supply power to the gas valve M; when the ignition detection signal and the ignition control signal are low level signals, the gas valve power supply control circuit 4 disconnects the external power supply from the gas valve M to stop supplying power to the gas valve M. In practical applications, the gas system may be, for example, a gas system including a gas range or a gas water heater, and the invention is not limited thereto. It should be noted that, in the embodiment of the present invention, the output end of the gas valve power supply control circuit 4 is further connected to a power supply end of the gas valve control circuit 3, and is used for simultaneously supplying power to the gas valve control circuit 3, in practical applications, the power supply may also be only supplied to the gas valve M, and the gas valve control circuit 3 is supplied with power by other external power supplies, which is not limited to the present invention.
Fig. 3A to fig. 3C are schematic diagrams of specific working processes of a gas system in an embodiment of the present invention, respectively, where in the corresponding working process in fig. 3A, when a user performs ignition, no flame is generated, a signal output by the ignition detection circuit 1 is a low level signal, the controller 2 receives an ignition operation signal of the user, and outputs an ignition control signal of a high level, so that a controlled switch in the gas valve power supply control circuit 4 is turned on, an external power supply starts to supply power to the gas valve control circuit 3 and the gas valve M, and the gas valve M is opened under the control of the gas valve control circuit 3 to output gas; the corresponding working process in fig. 3B is that after the ignition is completed for a period of time, namely, after there is a flame that burns normally, at this time, the fire detection signal output by the fire detection circuit 1 is a high level signal, and the controller 2 outputs a low level signal as the ignition control signal because the user does not perform the ignition operation, so that the controlled switch in the gas valve power supply control circuit 4 is turned on, the external power supply starts to supply power to the gas valve M, and the gas valve M continues to be kept in the open state; the working process that corresponds in fig. 3C is that the ignition fails or the gas is that flame is unusually extinguished in the combustion process, and owing to there is not flame this moment, the signal of examining the output of firing circuit 1 is low level signal, and the ignition operation signal of controller 2 output also is low level signal, and then makes the controlled switch end in the gas valve power control circuit 4 open, and external power supply stops to supply power for gas valve M, and gas valve M closes to avoid the gas to reveal and cause the potential safety hazard.
Through the above-mentioned cooperation of each component, the gas system provided by the embodiment of the present invention comprises: the gas valve power supply control circuit comprises a gas valve, a fire detection circuit, a controller, a gas valve control circuit and a gas valve power supply control circuit provided by another embodiment of the invention, wherein the output end of the fire detection circuit is connected with the first input end of the gas valve power supply control circuit and is used for detecting flame to output a fire detection signal; the input end of the controller is externally connected with an ignition operation signal of a user, and the output end of the controller is connected with the first input end of the gas valve power supply control circuit and used for generating an ignition control signal according to the ignition operation signal; the output end of the gas valve control circuit is connected with the control end of the gas valve and is used for controlling the gas valve to work according to the ignition control signal; and the gas valve power supply control circuit is used for receiving the ignition detection signal and the ignition control signal and controlling the external power supply to supply power to the gas valve according to the ignition detection signal and the ignition control signal. The potential safety hazard that causes the gas to reveal is avoided the gas valve to continue to open under the condition that the gas does not have normal use through gas valve power control circuit, has improved this gas system's security to it is energy-concerving and environment-protective more, the waste of the reduction energy.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A gas valve power control circuit, comprising: a driving chip and a controlled switch, wherein,
the input end of the driving chip is externally connected with a level signal, the output end of the driving chip is connected with the control end of the controlled switch and used for generating a driving signal according to the level signal to control the switching state of the controlled switch, and the level signal comprises an ignition detection signal and an ignition control signal;
the first end of the controlled switch is externally connected with a power supply, and the second end of the controlled switch is connected with a power supply end of the gas valve and used for controlling the external power supply to supply power to the gas valve.
2. A gas valve power supply control circuit as claimed in claim 1, further comprising: a first diode and a second diode, wherein,
the positive end of the first diode is externally connected with the fire detection signal, and the reverse end of the first diode is connected with the input end of the driving chip;
and the positive end of the second diode is externally connected with the ignition control signal, and the negative end of the second diode is connected with the input end of the driving chip.
3. A gas valve power supply control circuit as claimed in claim 1, further comprising: and one end of the first resistor is connected with the output end of the driving chip, and the other end of the first resistor is connected with the first end of the controlled switch.
4. A gas valve power supply control circuit as claimed in claim 1, further comprising: and one end of the second resistor is connected with the output end of the driving chip, and the other end of the second resistor is connected with the control end of the controlled switch.
5. A gas valve power supply control circuit as claimed in claim 1, further comprising: and one end of the filter capacitor is connected with the power end of the driving chip, and the other end of the filter capacitor is connected with the grounding end of the driving chip.
6. The gas valve power supply control circuit as claimed in claim 1, wherein said driver chip is an ULN2003A integrated circuit chip.
7. A gas valve power supply control circuit as claimed in claim 1, wherein the controlled switch is a transistor.
8. A gas valve power supply control circuit as claimed in claim 7, wherein the controlled switch is a PNP type transistor.
9. A gas system, comprising: a gas valve, a flame-sensing circuit, a controller, a gas valve control circuit and a gas valve power supply control circuit as claimed in any one of claims 1 to 8,
the output end of the fire detection circuit is connected with the first input end of the gas valve power supply control circuit and used for detecting flame and outputting a fire detection signal;
the input end of the controller is externally connected with an ignition operation signal of a user, and the output end of the controller is respectively connected with the first input end of the gas valve power supply control circuit and the gas valve control circuit and used for generating an ignition control signal according to the ignition operation signal;
the output end of the gas valve control circuit is connected with the control end of the gas valve and is used for controlling the gas valve to work according to the ignition control signal;
the second input end of the gas valve power supply control circuit is externally connected with a power supply, and the output end of the gas valve power supply control circuit is connected with the power supply end of the gas valve and used for receiving the fire detection signal and the ignition control signal and controlling the external power supply to supply power to the gas valve according to the fire detection signal and the ignition control signal.
10. Gas system according to claim 9,
when the fire detection signal or the ignition control signal is a high-level signal, the gas valve power supply control circuit is connected with the external power supply and the gas valve to supply power to the gas valve;
when the fire detection signal and the ignition control signal are low level signals, the gas valve power supply control circuit disconnects the external power supply from the gas valve, and the gas valve stops supplying power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992208.9A CN110762272A (en) | 2019-10-17 | 2019-10-17 | Gas valve power supply control circuit and gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992208.9A CN110762272A (en) | 2019-10-17 | 2019-10-17 | Gas valve power supply control circuit and gas system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110762272A true CN110762272A (en) | 2020-02-07 |
Family
ID=69332496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910992208.9A Pending CN110762272A (en) | 2019-10-17 | 2019-10-17 | Gas valve power supply control circuit and gas system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110762272A (en) |
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2019
- 2019-10-17 CN CN201910992208.9A patent/CN110762272A/en active Pending
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