CN219843435U - External power supply device of kitchen gas meter - Google Patents
External power supply device of kitchen gas meter Download PDFInfo
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- CN219843435U CN219843435U CN202222626053.7U CN202222626053U CN219843435U CN 219843435 U CN219843435 U CN 219843435U CN 202222626053 U CN202222626053 U CN 202222626053U CN 219843435 U CN219843435 U CN 219843435U
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- gas meter
- transformer
- charging
- kitchen gas
- supply device
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- 238000007599 discharging Methods 0.000 claims abstract description 42
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses an external power supply device of a kitchen gas meter, which comprises a transformer connected with mains supply, wherein on one hand, the transformer is directly connected with a PMOS tube Q1 through a first connecting wire and then supplies power to the kitchen gas meter through a second connecting wire; on the other hand, the output end of the transformer is also connected with a charging and discharging unit through a first connecting wire and is used for supplying power to the charging and discharging unit. The transformer further comprises a switch Q2, and the PMOS tube Q1 is conducted by the switch Q2 to supply power for the kitchen gas meter. When the transformer is powered off, the switch Q2 conducts the charging and discharging unit to supply power for the kitchen gas meter. The charging and discharging unit comprises a lithium battery charging and discharging management IC element U1, an inductor L1, a capacitor C2, a resistor R1, a lithium battery, and two indicator lamps LED1 and LED2. The intelligent gas meter can safely and continuously supply power, and the problem that the battery needs to be replaced at every other stage due to high power consumption of the existing intelligent gas meter is solved. The burden of the user is reduced, and the service life is longer.
Description
Technical Field
The utility model relates to the field of accessory design of household gas meters, in particular to an external power supply device of a kitchen gas meter.
Background
Currently, wireless meter reading and charging type intelligent gas meters are gradually popularized. Taking the Dalian area as an example, over ten thousand gas meters are gradually replaced by intelligent gas meters in nearly two years, and the intelligent gas meter has the functions of Lora networking automatic meter reading and remote control valve start and stop. The intelligent gas meter has obvious defects in terms of power consumption and has large power consumption. Four direct current batteries with the voltage range of 4.8V-6V are adopted for power supply, when the voltage is lower than 4.4V, the electric quantity is regarded as to be exhausted, a valve arranged in the meter is closed, and the duration of a new battery is generally about one year. When a user uses the electric cooker, the battery is suddenly powered off when cooking is performed, or the gas meter is powered off in the middle night, so that the user can cook as early as possible and the situation of non-ignition is caused. These situations can only be solved by timely replacement of a new battery, and phase change increases the burden on the user.
The gas meter is limited by design safety specifications, does not have a built-in rechargeable battery function or an alternating current 220V input interface and has explosion hazard, so that a meter factory always uses a dry battery power supply mode, and a user can automatically solve the problem of battery replacement. For intelligent gas meters with high power consumption, this mode is not applicable.
Disclosure of Invention
The utility model provides an effective and practical solution to the problem that the existing intelligent gas meter has high power consumption and needs to replace a battery at every other stage.
In order to achieve the above purpose, the utility model provides an external power supply device of a kitchen gas meter, which comprises a transformer connected with mains supply, wherein on one hand, the transformer is directly connected with a PMOS tube Q1 through a first connecting wire and then supplies power to the kitchen gas meter through a second connecting wire; on the other hand, the output end of the transformer is also connected with a charging and discharging unit through the first connecting wire and is used for supplying power to the charging and discharging unit. The transformer further comprises a switch Q2, and the PMOS tube Q1 is conducted by the switch Q2 to supply power for the kitchen gas meter. When the transformer is powered off, the switch Q2 is used for conducting the charging and discharging unit to supply power for the kitchen gas meter. The charging and discharging unit comprises a lithium battery charging and discharging management IC element U1, an inductor L1, a capacitor C2, a resistor R1, a lithium battery, and two indicator lamps LED1 and LED2.
Preferably, the first connection line and the second connection line are both USB lines.
Preferably, the Q2 is an MMBT5551LT1G silicon high voltage transistor.
Preferably, the type of the lithium battery charge and discharge management IC element U1 is PB0065E.
Preferably, the PMOS transistor Q1 is AO3401.
Preferably, the transformer is a transformer from AC220V to DC 5V.
The intelligent gas meter can safely and continuously supply power, and the problem that the battery needs to be replaced at every other stage due to high power consumption of the existing intelligent gas meter is solved. The burden of the user is reduced, and the service life is longer.
Drawings
Fig. 1 is a working schematic diagram of an external power supply device of the kitchen gas meter.
Fig. 2 is a circuit diagram of an external power supply device of the kitchen gas meter.
Detailed Description
As shown in fig. 1-2, the utility model discloses an external power supply device of a kitchen gas meter, which comprises a transformer connected with mains supply, wherein the transformer is a transformer for converting AC220V into DC 5V.
On the one hand, the transformer is directly connected with the PMOS tube Q1 through a first connecting wire and then supplies power to the kitchen gas meter through a second connecting wire; the PMOS tube Q1 is AO3401.
On the other hand, the output end of the transformer is also connected with a charging and discharging unit through the first connecting wire and is used for supplying power to the charging and discharging unit; the first connecting wire and the second connecting wire are USB wires.
The external power supply device further comprises a switch Q2, and the transformer conducts the PMOS tube Q1 through the switch Q2 to supply power for the kitchen gas meter; when the transformer is powered off, the switch Q2 is used for conducting the charging and discharging unit to supply power for the kitchen gas meter. The switch Q2 is an MMBT5551LT1G silicon high-voltage transistor. The charging and discharging unit comprises a lithium battery charging and discharging management IC element U1, an inductor L1, a capacitor C2, a resistor R1, a lithium battery, and two indicator lamps LED1 and LED2. The model of the lithium battery charge and discharge management IC element U1 is PB0065E.
As shown in fig. 2, the charge and discharge unit includes a lithium battery charge and discharge management IC element U1, an inductor L1 connected to the 1 st pin of the element U1, a capacitor C2 connected to the 3 rd pin of the element U1 and connected in parallel to the lithium battery, and indicator lamps LED1 and LED2 respectively connected to the 5 th and 6 th pins of the element U1.
As shown in fig. 2, the 5V access line further includes an auxiliary element capacitor C1 and a resistor R1.
Examples:
as shown in fig. 2, the external power supply device of the kitchen gas meter comprises a transformer connected with 220V mains supply, wherein on one hand, the transformer is directly connected with a PMOS tube Q1 through a first connecting wire and then supplies power to the kitchen gas meter through a second connecting wire; the PMOS tube Q1 is AO3401, and at the moment, the transformer converts AC220V into DC5V to supply power for the kitchen gas meter.
On the other hand, the output end of the transformer is also connected with a charging and discharging unit through the first connecting wire and is used for supplying power to the charging and discharging unit; the first connecting wire and the second connecting wire are USB wires. And when the transformer supplies power for the kitchen gas meter, the charging and discharging unit is charged.
When the mains supply is in power failure, the switch Q2 conducts the charging and discharging unit, and the lithium battery is used for charging and discharging the management IC element U1 to continuously supply power to the kitchen gas meter, so that the battery is not required to be replaced frequently during continuous voyage. The charging and discharging unit is only used in emergency when the mains supply is in power failure, and the service life of the charging and discharging unit is more than ten years.
As shown in fig. 2, a circuit structure of the present utility model is as follows: the transformer is inserted on a commercial power socket, the transformer is connected with a USB interface (A-type plug end) of a first connecting wire, and the output end of the first connecting wire is connected with a PMOS tube Q1. A resistor R2 is connected in series in front of the base 1 of the switch Q2, and a resistor R3 is connected in parallel between the front end of the base 1 and the rear end of the emitter 2. The collector 3 of the switch Q2 is divided into two paths, one path is connected to the PMOS tube Q1, and the other path is connected to the resistor R4 and then connected to the discharge management IC element U1. The transformer is also connected with the 4-pin VCC of the lithium battery charging and discharging management IC element U1 of the charging and discharging unit through the first connecting wire and is used for supplying power to the charging and discharging unit.
In the mains supply state, the switch Q2 is conducted to the PMOS tube Q1 to supply power for the kitchen gas meter through the second connecting wire.
Under the condition of commercial power outage, the switch Q2 conducts the charging and discharging unit, and an 8-pin OUT end boosted by a lithium battery charging and discharging management IC element U1 of the charging and discharging unit is connected to the USB-OUT end through the second connecting wire to continuously supply power for the kitchen gas meter.
In fig. 2, Q1 is an AO3401 logic level gate, switch Q2 is an MMBT5551LT1G silicon high voltage transistor, and U1 is a PB0065E single chip solution IC designed specifically for mobile power supply. In the present utility model, the lithium battery charge and discharge management IC.
Wherein, each pin of U1 represents respectively: VCC power supply voltage (bipolar device), LED2 light emitting diode, LED1 light emitting diode, KEY button, OUT output terminal, LX external inductance, BAT battery, GND ground wire.
The working process of the utility model is as follows:
1. in the working state of the circuit in fig. 2, when the DC5V is powered (there is commercial power), the switch Q2 is defaulted to turn on the PMOS transistor Q1; at this time, the 5V voltage is connected to the kitchen gas meter through the USB-OUT terminal of the second connecting wire to supply power to the kitchen gas meter.
2. When the DC5V is input with electricity (with commercial power), an internal boost circuit (3.7V to 5.1V of the lithium battery) of the lithium battery charge and discharge management IC element U1 does not work, and the 8-pin OUT does not have output; the transformer is connected to the 4 pin VCC of the lithium battery charging and discharging management IC element U1 of the charging and discharging unit through the first connection line for supplying power to the charging and discharging unit.
3. When DC5V is not input (no commercial power), an internal boost circuit (3.7V to 5.1V of the lithium battery) of the lithium battery charging and discharging management IC element U1 works, 8-pin OUT outputs 5.1V, and meanwhile Q1 is cut off to play a role in isolation.
4. The two states 2 and 3 are automatically and instantly switched; the switching trigger condition is the presence or absence of the output DC5V of the transformer.
As shown in fig. 1, the working principle of the utility model is similar to that of BAT54C, and the AC220V is converted into DC5V to supply power at ordinary times, and the standby battery is used for supplying power when the power is off, so that the battery is not replaced frequently during long-term endurance. The standby battery is only used in emergency when the mains supply fails, and the service life is more than ten years.
The utility model does not change the gas meter, and only changes the original dry battery power supply mode into the external power supply device, wherein DC5V output by a transformer in the external power supply device is directly supplied to the kitchen gas meter after passing through the PMOS tube Q1, and the transformer can charge the charging and discharging unit. When the mains supply is in power failure, the charging and discharging unit is switched to continuously supply power to the gas meter through the booster circuit in the lithium battery charging and discharging management IC element U1, and after the mains supply is recovered, the charging and discharging unit is switched back to a normal state of direct supply of DC 5V. The utility model has lower cost, and only needs to select one USB charging wire, one PMOS tube Q1, one switch Q2, one brand transformer authenticated by safety regulations and one 5V charging and discharging unit (18650 lithium battery type).
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should be covered by the protection scope of the present utility model by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (8)
1. The external power supply device of the kitchen gas meter is characterized by comprising a transformer connected with mains supply, wherein the transformer is directly connected with a PMOS tube Q1 through a first connecting wire and then supplies power to the kitchen gas meter through a second connecting wire; the output end of the transformer is also connected with a charging and discharging unit through the first connecting wire and is used for supplying power to the charging and discharging unit:
the external power supply device further comprises a switch Q2, and the transformer conducts the PMOS tube Q1 through the switch Q2 to supply power for the kitchen gas meter; when the transformer is powered off, the switch Q2 is used for conducting the charging and discharging unit to supply power for the kitchen gas meter.
2. The external power supply device for a kitchen gas meter according to claim 1, wherein the charging and discharging unit comprises a lithium battery charging and discharging management IC element U1, an inductor L1 connected to a 1 st pin of the element U1, a capacitor C2 connected to a 3 rd pin of the element U1 and connected in parallel to the lithium battery, and indicator lights LED1 and LED2 respectively connected to 5 th and 6 th pins of the element U1.
3. The external power supply device of a kitchen gas meter according to claim 1, wherein the first connection line and the second connection line are USB lines.
4. The external power supply device for the kitchen gas meter according to claim 1, wherein the Q2 is an MMBT5551LT1G silicon high voltage transistor.
5. The external power supply device for the kitchen gas meter according to claim 2, wherein the type of the lithium battery charge and discharge management IC element U1 is PB0065E.
6. The external power supply device for the kitchen gas meter according to claim 1, wherein the PMOS tube Q1 is AO3401.
7. The external power supply device for a kitchen gas meter according to claim 1, wherein the transformer is a transformer for converting AC220V to DC 5V.
8. The external power supply device for a kitchen gas meter according to claim 6, wherein the 5V access line further comprises an auxiliary element capacitor C1 and a resistor R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222626053.7U CN219843435U (en) | 2022-10-08 | 2022-10-08 | External power supply device of kitchen gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222626053.7U CN219843435U (en) | 2022-10-08 | 2022-10-08 | External power supply device of kitchen gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219843435U true CN219843435U (en) | 2023-10-17 |
Family
ID=88303301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222626053.7U Active CN219843435U (en) | 2022-10-08 | 2022-10-08 | External power supply device of kitchen gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219843435U (en) |
-
2022
- 2022-10-08 CN CN202222626053.7U patent/CN219843435U/en active Active
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