CN214506652U - Power supply circuit, ignition device and household electrical appliance - Google Patents
Power supply circuit, ignition device and household electrical appliance Download PDFInfo
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- CN214506652U CN214506652U CN202120557861.5U CN202120557861U CN214506652U CN 214506652 U CN214506652 U CN 214506652U CN 202120557861 U CN202120557861 U CN 202120557861U CN 214506652 U CN214506652 U CN 214506652U
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Abstract
The utility model relates to a supply circuit, ignition and tame electric installation, supply circuit's power includes two parts, and one is the dry battery of connecting in dry battery interface, and its two is the power through the access of universal serial bus power interface. When the dry battery is exhausted or the user needs to use other power supplies, the user can access other power supplies through the universal serial bus power supply interface, at the moment, the switch device is in a disconnected state, and the power supply loop corresponding to the dry battery is cut off, so that the power supply operation is directly carried out by the power supply accessed through the universal serial bus power supply interface. By the scheme, the dry battery and other types of power supplies can be switched to use, and the dry battery is prevented from suddenly not affecting the work of the electric device; meanwhile, due to the use of the power supply accessed by the universal serial bus power supply interface, the service time of the dry battery power supply can be effectively reduced, the consumption of the dry battery is further reduced, the environmental pollution caused by discarding the dry battery is avoided, and the power supply reliability is high.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a power supply circuit, an ignition device and household appliance equipment.
Background
With the rapid development of scientific technology and the continuous improvement of the living standard of people, modern kitchens develop towards intellectualization, and intelligent gas cookers as household appliances with mature development are widely used in daily life of people and gradually become indispensable household appliance products.
When the traditional intelligent gas stove is used, the ignition device of the intelligent gas stove is powered through the dry battery, and the whole circuit of the intelligent gas stove is powered. However, in the use process of the dry battery, the dry battery consumes too fast electricity and needs to be replaced frequently, the internal material of the dry battery contains a lot of heavy metals, and the dry battery is discarded after the electricity is exhausted, so that the environmental pollution is serious; meanwhile, if the dry battery is suddenly discharged during the cooking process, the cooking operation will be seriously affected. Therefore, the conventional intelligent gas stove has the disadvantage of poor power supply reliability.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a power supply circuit, an ignition device and a household appliance for solving the problem of poor power supply reliability of the conventional intelligent gas stove.
A power supply circuit comprising: the dry battery interface is used for connecting a dry battery; the universal serial bus power interface is connected with the output end of the switch device and the electrical appliance; the control end of the switch device is connected with the universal serial bus power interface, and the input end of the switch device is connected with the dry battery interface; when the universal serial bus power interface is connected with a power supply, the switch device is in an off state, and when the universal serial bus power interface is not connected with the power supply, the switch device is in an on state.
In one embodiment, the power supply circuit further comprises a backflow prevention device, and the universal serial bus power interface is connected with the output end of the switch device and the electrical appliance through the backflow prevention device.
In one embodiment, the backflow prevention device comprises a diode, the anode of the diode is connected with the universal serial bus power interface, and the cathode of the diode is connected with the output end of the switch device and the electrical appliance.
In one embodiment, the switching device includes a switching device and a pull-down resistor, a control terminal of the switching device is connected to one end of the pull-down resistor, a common terminal is used as a control terminal of the switching device, an input terminal of the switching device is used as an input terminal of the switching device, an output terminal of the switching device is used as an output terminal of the switching device, and the other end of the pull-down resistor is grounded.
In one embodiment, the switching device is a transistor.
In one embodiment, the switching device is a metal oxide semiconductor field effect transistor.
In one embodiment, the switching device is a P-channel metal oxide semiconductor field effect transistor.
An ignition device comprises the power supply circuit.
A household appliance comprises the power supply circuit.
In one embodiment, the household appliance is a gas range.
The power supply circuit comprises a dry battery connected with a dry battery interface, and a power supply connected with a universal serial bus power interface. When the dry battery is exhausted or the user needs to use other power supplies, the user can access other power supplies through the universal serial bus power supply interface, at the moment, the switch device is in a disconnected state, and the power supply loop corresponding to the dry battery is cut off, so that the power supply operation is directly carried out by the power supply accessed through the universal serial bus power supply interface. By the scheme, the dry battery and other types of power supplies can be switched to use, and the dry battery is prevented from suddenly not affecting the work of the electric device; meanwhile, due to the use of the power supply accessed by the universal serial bus power supply interface, the service time of the dry battery power supply can be effectively reduced, the consumption of the dry battery is further reduced, the environmental pollution caused by discarding the dry battery is avoided, and the power supply reliability is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a power supply circuit;
FIG. 2 is a schematic diagram of a power supply circuit according to another embodiment;
fig. 3 is a schematic diagram of a power supply circuit according to another embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, a power supply circuit includes: a dry battery interface 10 for connecting a dry battery; a universal serial bus power interface 20 for connecting the output terminal of the switching device 30 and the electric device; the control end of the switch device 30 is connected with the universal serial bus power interface 20, and the input end is connected with the dry battery interface 10; when the usb power interface 20 is powered on, the switch device 30 is in an open state, and when the usb power interface 20 is not powered on, the switch device 30 is in a closed state.
Specifically, the usb power interface 20 is a usb (universal Serial bus) power interface, through which a power access operation can be implemented. It should be noted that the type of power source connected to the USB power interface 20 is not exclusive, and in one embodiment, the mobile power source may be directly connected to the USB power source for supplying power. In another embodiment, the USB power supplying operation can be realized by connecting the charging adapter to the USB power interface 20 and then connecting the charging adapter to another power source terminal.
The control terminal of the switch device 30 is connected to the usb power interface 20, while the input terminal is connected to the dry cell interface 10, i.e. connected to a dry cell, which is used as the input of the switch device 30, and the output terminal of the switch device 30 is connected to the usb power interface 20 and the electric device. Through this kind of connected mode, when universal serial bus power source 20 did not insert the power, switching device 30's control end was in low level state, would make switching device 30 closed this moment, and the dry battery of switching device 30 input will regard as the power input, later carries to with electrical equipment to supply power operation through switching device 30's output.
When the usb power interface 20 is connected to a power source, the control terminal of the switch device 30 will be in a high level state, and at this time, the control device will enter a disconnected state, and the dry battery power at the input terminal of the corresponding switch device 30 will not flow through the switch device 30, and at this time, the switch device will be switched to perform a power supply operation in a manner of supplying power by the power source connected to the usb power interface 20.
Referring to fig. 2, in one embodiment, the power supply circuit further includes a backflow prevention device 40, and the usb power interface 20 connects the output terminal of the switching device 30 and the power consuming device through the backflow prevention device 40.
Specifically, the backflow preventing device 40 is a device that prevents the current flowing into the electric device from flowing back to the switching device 30. Through the arrangement of the backflow prevention device 40 in the embodiment, when the dry battery is used for power supply, the current generated by the dry battery can be effectively ensured not to flow back to the universal serial bus power interface 20, namely, the current can not flow back to the switch device 30 through the universal serial bus power interface 20, so that the normal operation of the power supply circuit is not influenced, and further, the working reliability of the power supply circuit can be further improved.
It should be noted that the specific type of backflow prevention device 40 is not exclusive, as long as it can only be ensured that the battery current flowing out of the switching device 30 does not flow back to the switching device 30. For example, in a more detailed embodiment, the backflow prevention device 40 includes a diode having an anode connected to the usb power interface 20 and a cathode connected to the output of the switching device 30 and the powered device.
In particular, the present embodiment utilizes the unidirectional conductivity of the diode, when the usb power interface 20 at the anode of the diode is connected to a power supply, the current generated by the power supply can flow from the anode of the diode to the cathode of the diode, and further to the output of the switching device 30 and the electrical device. When the usb power interface 20 is not connected to the power supply, the switch device 30 is in a closed state, and the current generated by the dry battery can flow through the input terminal of the switch device 30 to the output terminal, and then further flow into the electric device through the output terminal of the switch device 30. At this time, when the current output by the dry battery flows into the electric device, the current cannot flow into the anode of the diode from the cathode of the diode due to the design of the front end diode of the electric device, namely, the current is prevented from flowing back.
It is understood that the specific type of the switch device 30 is not exclusive, as long as the switch device 30 is in an open state when the usb power interface 20 is connected to the power source, so that the current of the dry battery will not flow into the electrical equipment, and the switch device 30 is in a closed state when the usb power interface 20 is not connected to the power source, so that the current generated by the dry battery will flow into the electrical equipment.
For example, referring to fig. 3, in a more detailed embodiment, the switch device 30 includes a switch device 21 and a pull-down resistor R1, a control terminal of the switch device 21 is connected to one terminal of the pull-down resistor R1, a common terminal is used as a control terminal of the switch device 30, an input terminal of the switch device 21 is used as an input terminal of the switch device 30, an output terminal of the switch device 21 is used as an output terminal of the switch device 30, and the other terminal of the pull-down resistor R1 is grounded.
Specifically, in the solution of this embodiment, when a user has a requirement for supplying power by using a USB power supply, the USB power interface 20 will be connected to a power supply with a certain size, and at this time, a current generated by the power supply directly flows into an electrical device to supply power to the electrical device. Meanwhile, the control end of the switch device 21 and one end of the pull-down resistor R1 are both connected with the USB power supply, and under the gating action of the USB power supply, the switch device 21 will be in the off state, so that the dry battery power supply at the input end of the switch device 21 cannot flow into the switch device 21.
When the user does not use the USB power source for power supply, the control terminal of the switch device 21 and one end of the pull-down resistor R1 are not connected to the power source, and in this gating mode, the switch device 21 is in a closed state, so that the current generated by the dry battery power source at the dry battery interface 10 flows to the electrical appliance for dry battery power supply through the output terminal of the switch device 21.
Referring to fig. 3, for the convenience of understanding the power supply circuit of the present application, the following description is made with reference to an embodiment in which the backflow prevention device 40 is a diode, the USB power source is a 5V power source, the dry battery power source includes two 1.5V dry batteries, and the switching device 30 includes a pull-down resistor R1 and a switching device 21.
When a user selects a dry battery to supply power, and the USB is not used, the USB power supply +5V is disconnected, the dry battery anode power supply BAT + provides a +3V power supply, and the voltage of the input end of the switch device 21 is +3V at the moment of power supply; after the voltage drop across the internal diode, the output of the switching device 21 is + 2.8V; the control terminal of the switching device 21 is pulled low by the pull-down resistor R1 to be 0V. At this time, the output end voltage +2.8V of the switch device 21 is larger than the control end voltage 0V, the switch device 21 is conducted immediately, the dry battery anode power supply BAT + after conduction does not pass through the internal diode and is directly output at the output end of the switch device 21, the pipe voltage drop of the switch device 21 is extremely low and can be ignored temporarily, the voltage at the output end of the switch device 21 can be approximately equal to the input end voltage of the switch device 21, and therefore a +3V power supply is provided for electrical appliances.
When the user selects the USB to supply power and the dry battery is not used, the dry battery anode power supply BAT + is disconnected, and the USB provides a +5V power supply. When power is supplied, the +5V voltage of the USB power supply passes through the diode, the voltage of the output end of the switching device 21 is +4.8V due to the fact that the tube voltage drop of the diode is 0.2V, the control end of the switching device 21 is connected with the universal serial bus power interface 20 to provide the +5V power supply, the voltage of the +5V power supply is +5V, and the input end of the switching device 21 is connected with the positive electrode power supply BAT + of the dry battery, and the voltage of the +3V power supply is + 3V. At this time, the control end voltage +5V of the switching device 21 is greater than the output end voltage +4.8V of the switching device 21, the switching device 21 is in a cut-off state, and at this time, the universal serial bus power interface 20 provides +4.8V power for the electrical equipment.
It will be appreciated that the particular type of switching device 21 is not exclusive and in one embodiment, the switching device 21 is a transistor.
Specifically, a transistor, also called a semiconductor transistor or a bipolar transistor, is a semiconductor device for controlling a current, and functions to amplify a weak signal into an electrical signal having a large amplitude value, and also functions as a contactless switch. The transistor is formed by manufacturing two PN junctions which are very close to each other on a semiconductor substrate, the whole semiconductor is divided into three parts by the two PN junctions, the middle part is a base region, the two side parts are an emitter region and a collector region, and the PNP and NPN are arranged in a mode. The switching operation between the USB power supply and the dry battery power supply in the power supply circuit is realized by using the switching characteristic of the transistor as the switching device 21 in the on-off device.
In another embodiment, the switching device 21 is a metal oxide semiconductor field effect transistor.
Specifically, Metal-Oxide-Semiconductor Field-Effect transistors (MOSFETs) are classified into two types, i.e., N and P, according to the polarity of their channels (working carriers), which are commonly referred to as NMOSFETs and PMOSFETs, or NMOS and PMOS. The present embodiment utilizes the switching characteristics of the MOS transistor as the switching device 21 of the switching device 30 to realize the switching operation between the USB power supply and the dry battery power supply.
It is understood that in other embodiments, other types of devices such as a relay may be used as the switching device 21, as long as the switching between the USB power supply and the dry battery power supply can be realized according to the user's requirement.
Further, in one embodiment, the switching device 21 is a P-channel metal oxide semiconductor field effect transistor. In this embodiment, a P-channel metal oxide semiconductor field effect transistor is specifically adopted, and the field effect transistor of this type is in a cut-off state when a level signal of a control terminal is higher than a level signal of an output terminal, and is in a conduction state when the level signal of the control terminal is lower than the level signal of the output terminal, so that switching operation of different types of power supplies can be realized.
The power supply circuit comprises a dry battery connected with the dry battery interface 10 and a power supply connected with the universal serial bus power interface 20. When the dry battery is exhausted or the user needs to use other power supplies, the user can access other power supplies through the universal serial bus power supply interface 20, and at the moment, the switch device 30 is in a disconnected state, and a power supply loop corresponding to the dry battery is cut off, so that the power supply operation is directly carried out by adopting the power supply accessed by the universal serial bus power supply interface 20. By the scheme, the dry battery and other types of power supplies can be switched to use, and the dry battery is prevented from suddenly not affecting the work of the electric device; meanwhile, due to the use of the power supply accessed by the universal serial bus power supply interface 20, the service time of the dry battery power supply can be effectively reduced, the consumption of the dry battery is further reduced, the environmental pollution caused by discarding the dry battery is avoided, and the power supply reliability is high.
An ignition device comprises the power supply circuit.
Specifically, as shown in the above embodiments and the accompanying drawings, the control terminal of the switch device 30 is connected to the usb power interface 20, the input terminal is connected to the dry cell interface 10, i.e. connected to a dry cell, which is used as the input of the switch device 30, and the output terminal of the switch device 30 is connected to the usb power interface 20 and the electric device (in this embodiment, an igniter). Through this kind of connected mode, when universal serial bus power source 20 did not insert the power, switching device 30's control end was in low level state, would make switching device 30 closed this moment, and the dry battery of switching device 30 input will regard as the power input, later carries to with electrical equipment to supply power operation through switching device 30's output.
When the usb power interface 20 is connected to a power source, the control terminal of the switch device 30 will be in a high level state, and at this time, the control device will enter a disconnected state, and the dry battery power at the input terminal of the corresponding switch device 30 will not flow through the switch device 30, and at this time, the switch device will be switched to perform a power supply operation in a manner of supplying power by the power source connected to the usb power interface 20.
Furthermore, the power supply circuit is also provided with a backflow prevention device 40, and the universal serial bus power interface 20 is connected with the output end of the switch device 30 and the igniter through the backflow prevention device 40. Through the arrangement of the backflow prevention device 40 in the embodiment, when the dry battery is used for power supply, the current generated by the dry battery can be effectively ensured not to flow back to the universal serial bus power interface 20, namely, the current can not flow back to the switch device 30 through the universal serial bus power interface 20, so that the normal operation of the power supply circuit is not influenced, and further, the working reliability of the power supply circuit can be further improved.
Further, in a more detailed embodiment, the switch device 30 includes a switch device 21 and a pull-down resistor R1, a control terminal of the switch device 21 is connected to one terminal of the pull-down resistor R1, and the common terminal is used as a control terminal of the switch device 30, an input terminal of the switch device 21 is used as an input terminal of the switch device 30, an output terminal of the switch device 21 is used as an output terminal of the switch device 30, and the other terminal of the pull-down resistor R1 is grounded.
When a user needs to use the USB power source for power supply, the USB power source interface 20 will be connected to a power source with a certain size, and the current generated by the power source directly flows into the igniter to supply power to the igniter. Meanwhile, the control end of the switch device 21 and one end of the pull-down resistor R1 are both connected with the USB power supply, and under the gating action of the USB power supply, the switch device 21 will be in the off state, so that the dry battery power supply at the input end of the switch device 21 cannot flow into the switch device 21.
When the user does not use the USB power source for power supply, the control terminal of the switch device 21 and one end of the pull-down resistor R1 are not connected to the power source, and in this gating mode, the switch device 21 is in a closed state, so that the current generated by the dry battery power source at the dry battery interface 10 flows to the igniter via the output terminal of the switch device 21 for dry battery power supply.
In the above ignition device, the power supply of the power supply circuit includes two parts, one is a dry battery connected to the dry battery interface 10, and the other is a power supply accessed through the universal serial bus power interface 20. When the dry battery is exhausted or the user needs to use other power supplies, the user can access other power supplies through the universal serial bus power supply interface 20, and at the moment, the switch device 30 is in a disconnected state, and a power supply loop corresponding to the dry battery is cut off, so that the power supply operation is directly carried out by adopting the power supply accessed by the universal serial bus power supply interface 20. By the scheme, the dry battery and other types of power supplies can be switched to use, and the dry battery is prevented from suddenly not sounding the ignition device; meanwhile, due to the use of the power supply accessed by the universal serial bus power supply interface 20, the service time of the dry battery power supply can be effectively reduced, the consumption of the dry battery is further reduced, the environmental pollution caused by discarding the dry battery is avoided, and the power supply reliability is high.
A household appliance comprises the power supply circuit.
Specifically, as shown in the above embodiments and the accompanying drawings, the control terminal of the switch device 30 is connected to the usb power interface 20, the input terminal is connected to the dry cell interface 10, that is, connected to a dry cell, which is used as the input of the switch device 30, and the output terminal of the switch device 30 is connected to the usb power interface 20 and an electric device (in this embodiment, an electric device of a household appliance). Through this kind of connected mode, when universal serial bus power source 20 did not insert the power, switching device 30's control end was in low level state, would make switching device 30 closed this moment, and the dry battery of switching device 30 input will regard as the power input, later carries to with electrical equipment to supply power operation through switching device 30's output.
When the usb power interface 20 is connected to a power source, the control terminal of the switch device 30 will be in a high level state, and at this time, the control device will enter a disconnected state, and the dry battery power at the input terminal of the corresponding switch device 30 will not flow through the switch device 30, and at this time, the switch device will be switched to perform a power supply operation in a manner of supplying power by the power source connected to the usb power interface 20.
Furthermore, the power supply circuit is further provided with a backflow prevention device 40, and the universal serial bus power interface 20 is connected with the output end of the switch device 30 and the electrical appliance of the household appliance through the backflow prevention device 40. Through the arrangement of the backflow prevention device 40 in the embodiment, when the dry battery is used for power supply, the current generated by the dry battery can be effectively ensured not to flow back to the universal serial bus power interface 20, namely, the current can not flow back to the switch device 30 through the universal serial bus power interface 20, so that the normal operation of the power supply circuit is not influenced, and further, the working reliability of the power supply circuit can be further improved.
Further, in a more detailed embodiment, the switch device 30 includes a switch device 21 and a pull-down resistor R1, a control terminal of the switch device 21 is connected to one terminal of the pull-down resistor R1, and the common terminal is used as a control terminal of the switch device 30, an input terminal of the switch device 21 is used as an input terminal of the switch device 30, an output terminal of the switch device 21 is used as an output terminal of the switch device 30, and the other terminal of the pull-down resistor R1 is grounded.
When a user has a requirement of using a USB power supply to supply power, the USB power interface 20 will be connected to a power supply with a certain size, and the current generated by the power supply directly flows into the electrical devices of the household electrical appliance to supply power. Meanwhile, the control end of the switch device 21 and one end of the pull-down resistor R1 are both connected with the USB power supply, and under the gating action of the USB power supply, the switch device 21 will be in the off state, so that the dry battery power supply at the input end of the switch device 21 cannot flow into the switch device 21.
When the user does not use the USB power source for power supply, the control terminal of the switch device 21 and one end of the pull-down resistor R1 are not connected to the power source, and in this gating mode, the switch device 21 is in a closed state, so that the current generated by the dry battery power source at the dry battery interface 10 flows to the electrical appliance of the household appliance for dry battery power supply through the output terminal of the switch device 21.
It will be appreciated that the type of household appliance is not exclusive and may be any appliance that requires a voltage supply to operate, for example, in one embodiment, the household appliance is a gas range.
Specifically, when the gas stove adopts dry batteries for power supply, one battery of the dry batteries is +1.5V, two dry batteries are connected in series to be +3V, and the value of the supplied power voltage is limited. For a user who often uses the gas stove, the dry battery consumes power quickly, so that the user needs to frequently replace the dry battery, and the discarded dry battery has great pollution to the environment; if the dry batteries are suddenly dead in the process of cooking, a user just needs to buy the dry batteries for supplying power again at home, for example, the dry batteries are bought for supplying power again when the user is in a key moment of cooking the sweet potato, and the dish of the sweet potato is always fresh, so that cooking and mood are influenced. In order to solve the above problems, the solution of this embodiment adds a usb power interface 20 to the gas stove to supply power instead of a dry battery, and the usb power interface 20 can be connected to a charging adapter or a mobile charging power supply according to the user's preference, which is simple and convenient and can be used as desired.
In the above home appliance, the power supply of the power supply circuit includes two parts, one is a dry battery connected to the dry battery interface 10, and the other is a power supply accessed through the usb power interface 20. When the dry battery is exhausted or the user needs to use other power supplies, the user can access other power supplies through the universal serial bus power supply interface 20, and at the moment, the switch device 30 is in a disconnected state, and a power supply loop corresponding to the dry battery is cut off, so that the power supply operation is directly carried out by adopting the power supply accessed by the universal serial bus power supply interface 20. By the scheme, the dry battery and other types of power supplies can be switched to use, and the dry battery is prevented from suddenly not sounding the ignition device; meanwhile, due to the use of the power supply accessed by the universal serial bus power supply interface 20, the service time of the dry battery power supply can be effectively reduced, the consumption of the dry battery is further reduced, the environmental pollution caused by discarding the dry battery is avoided, and the power supply reliability of the household appliance is effectively improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power supply circuit, comprising:
the dry battery interface is used for connecting a dry battery;
the universal serial bus power interface is connected with the output end of the switch device and the electrical appliance;
the control end of the switch device is connected with the universal serial bus power interface, and the input end of the switch device is connected with the dry battery interface; when the universal serial bus power interface is connected with a power supply, the switch device is in an off state, and when the universal serial bus power interface is not connected with the power supply, the switch device is in an on state.
2. The power supply circuit of claim 1, further comprising a backflow prevention device, wherein the usb power interface connects the output of the switching device and the electrical device through the backflow prevention device.
3. The power supply circuit of claim 2, wherein the backflow prevention device comprises a diode, an anode of the diode is connected to the usb power interface, and a cathode of the diode is connected to the output terminal of the switching device and the electrical device.
4. The power supply circuit according to any one of claims 1-3, wherein the switching device comprises a switching device and a pull-down resistor, a control terminal of the switching device is connected to one terminal of the pull-down resistor, a common terminal is used as a control terminal of the switching device, an input terminal of the switching device is used as an input terminal of the switching device, an output terminal of the switching device is used as an output terminal of the switching device, and the other terminal of the pull-down resistor is grounded.
5. The power supply circuit of claim 4, wherein the switching device is a transistor.
6. The power supply circuit of claim 4, wherein the switching device is a metal oxide semiconductor field effect transistor.
7. The power supply circuit of claim 6, wherein the switching device is a P-channel metal oxide semiconductor field effect transistor.
8. An ignition device, characterized in that it comprises a supply circuit according to any one of claims 1-7.
9. An electric household appliance comprising a supply circuit as claimed in any one of claims 1 to 7.
10. The home appliance of claim 9, wherein the home appliance is a gas range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120557861.5U CN214506652U (en) | 2021-03-18 | 2021-03-18 | Power supply circuit, ignition device and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120557861.5U CN214506652U (en) | 2021-03-18 | 2021-03-18 | Power supply circuit, ignition device and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214506652U true CN214506652U (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120557861.5U Active CN214506652U (en) | 2021-03-18 | 2021-03-18 | Power supply circuit, ignition device and household electrical appliance |
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| Country | Link |
|---|---|
| CN (1) | CN214506652U (en) |
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2021
- 2021-03-18 CN CN202120557861.5U patent/CN214506652U/en active Active
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