CN209282820U - A kind of leakage protection circuit applied to instant-heating water drinking machine - Google Patents
A kind of leakage protection circuit applied to instant-heating water drinking machine Download PDFInfo
- Publication number
- CN209282820U CN209282820U CN201920099469.3U CN201920099469U CN209282820U CN 209282820 U CN209282820 U CN 209282820U CN 201920099469 U CN201920099469 U CN 201920099469U CN 209282820 U CN209282820 U CN 209282820U
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- China
- Prior art keywords
- mcu
- leakage protection
- instant
- heating water
- protection circuit
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- Expired - Fee Related
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a kind of leakage protection circuits applied to instant-heating water drinking machine, the leakage protection circuit includes the zero sequence current mutual inductor being sequentially connected electrically, earth leakage protective integrated circuit and MCU, the MCU is connected with relay, the earth leakage protective integrated circuit is used for when the state of current imbalance occurs in detection zero sequence current mutual inductor, earth leakage protective integrated circuit issues corresponding control signal to the MCU, MCU is set to issue corresponding shutdown signal to the relay, the relay is used to turn off the power supply of the instant-heating water drinking machine when receiving shutdown signal.Using the utility model, can effectively detect whether instant-heating water drinking machine drain conditions occurs, when detect there are drain conditions when, can automatically shut power off and issue leakage-current alarm information.
Description
Technical field
The utility model relates to a kind of leakage protection circuits, and in particular to a kind of earth leakage protective applied to instant-heating water drinking machine
Circuit.
Background technique
Traditional water dispenser is heated using hot water packet, and heating speed is slow, when hot water is not taken in time after heating, hot water water
Water can be thermally formed repeatedly again after temperature drop is low so-called " thousand boiling water ", unfavorable health, and equipment is in work shape for a long time
State, power consumption is more, not environmentally.In order to solve traditional water dispenser there are the drawbacks of, instant-heating water drinking machine comes into being, it using thick film send out
Thermal technology, heating is fast, does not need liner water storage and goes to heat, water flow, which flows through thick film pipe, to be warming up to required temperature for normal-temperature water.
In instant-heating water drinking machine, if drain conditions occur for the heater element in instant-heating water drinking machine, there can be biggish security risk, because
This needs to design a kind of technical solution of detectable drain conditions, to prevent security risk.
Utility model content
In order to overcome the deficiencies of the prior art and there are the problem of, the utility model provides a kind of applied to instant-heating water drinking machine
Leakage protection circuit can effectively detect whether instant-heating water drinking machine drain conditions occurs using the leakage protection circuit, when detecting
When there are drain conditions, it can automatically shut power off and issue leakage-current alarm information.
The utility model is achieved through the following technical solutions: a kind of earth leakage protective electricity applied to instant-heating water drinking machine
Road, the leakage protection circuit include the zero sequence current mutual inductor being sequentially connected electrically, earth leakage protective integrated circuit and MCU,
The MCU is connected with relay, and the earth leakage protective integrated circuit is used to electric current injustice occur when detection zero sequence current mutual inductor
When the state of weighing apparatus, earth leakage protective integrated circuit issues corresponding control signal to the MCU, issues MCU and closes letter accordingly
Number to the relay, the relay is used to turn off the power supply of the instant-heating water drinking machine when receiving shutdown signal.
Further, the MCU is also connected with display screen.
Preferably, the display screen is LED display or LCD display.
Preferably, the chip model M54123 of the earth leakage protective integrated circuit.
Preferably, the model 12C5A60S2 of the MCU；The model HDZ18L-1 of the zero sequence current mutual inductor
The utility model is integrated using earth leakage protective by the way that zero sequence current mutual inductor is arranged in the circuit of instant-heating water drinking machine
Whether circuit, which unbalanced state occurs detecting the current signal of zero sequence current mutual inductor, judges whether instant-heating water drinking machine goes out
Existing drain conditions, if there are drain conditions, MCU exports the power supply of shutdown signal control cut-off instant-heating water drinking machine immediately,
To can effectively protect instant-heating water drinking machine and prevent security risk.
Detailed description of the invention
Fig. 1 is the circuit diagram of leakage protection circuit described in the utility model.
Specific embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with the drawings and specific embodiments to the utility model make into
One step detailed description.
As shown in Fig. 1, a kind of leakage protection circuit applied to instant-heating water drinking machine, the leakage protection circuit include
Zero sequence current mutual inductor ZCT, earth leakage protective integrated circuit and the MCU being sequentially connected electrically, the MCU are connected with relay, should
Relay can control the on-off of instant-heating water drinking machine power supply；The earth leakage protective integrated circuit is used for when detection zero sequence current mutual inductor
When the state of current imbalance occurs in ZCT, earth leakage protective integrated circuit issues corresponding control signal to the MCU, sends out MCU
To the relay, the relay is used to turn off the i.e. hot drink water when receiving shutdown signal corresponding shutdown signal out
The power supply of machine.In the present embodiment, the preferred model 12C5A60S2 of the MCU；The model of the zero sequence current mutual inductor is preferred
For HDZ18L-1.Certainly, in practical applications, the MCU and current transformer of other models can also be chosen according to actual needs.
As preferred embodiment, the MCU is also connected with display screen, which can be used for receiving and showing that MCU is sent out
The leakage-current alarm information sent.Wherein, the display screen can be LED display or LCD display.
In a wherein preferred embodiment, the chip model M54123 of the earth leakage protective integrated circuit specifically may be used
For M54123GL；Earth leakage protective integrated circuit M54123GL and the particular circuit configurations of zero sequence current mutual inductor ZCT and MCU are for example attached
Shown in Fig. 1, this will not be detailed here.
Illustrate the course of work or working principle of leakage protection circuit provided in this embodiment briefly below:
The leakage protection circuit is applied in instant-heating water drinking machine circuit, when the heat-generating pipe in instant-heating water drinking machine is normally transported
When row, electric current is in equilibrium state in circuit, and the sum of the current phasor in zero sequence current mutual inductor ZCT is that zero (electric current is that have direction
Vector, be such as "+" by the direction of outflow, returning direction is "-", and round-trip size of current is equal in mutual inductor, contrary,
It is positive and negative to cancel out each other)；When drain conditions occur for heat-generating pipe, voltage-to-ground occurs in heat-generating pipe, and (when normal, heat-generating pipe and the earth are
For zero potential), cause the electric current of zero sequence current mutual inductor ZCT inflow and outflow non-equilibrium state, zero sequence current mutual inductor ZCT occur
It can detect that the abnormality, earth leakage protective integrated circuit M54123 sends corresponding control signal to MCU, MCU output at this time
For shutdown signal to relay, the actuating of relay at this time turns off the power supply of instant-heating water drinking machine, at the same MUC also issue corresponding information to
Display screen, display screen show leakage-current alarm information to remind user.
Although it should be noted that use MCU and related computer program in the utility model, MCU and correlation
Computer program is the prior art, therefore the utility model is not related to the improvement of computer program.
Above-described embodiment is the preferable implementation of the utility model, is not the restriction to the utility model, not
Be detached from the utility model inventive concept under the premise of, it is any it is obvious replacement the protection scope of the utility model it
It is interior.
Claims (6)
1. a kind of leakage protection circuit applied to instant-heating water drinking machine, it is characterised in that: the leakage protection circuit include according to
Zero sequence current mutual inductor, earth leakage protective integrated circuit and the MCU of secondary electrical connection, the MCU are connected with relay, the electric leakage
Protection integrated circuit is used for when the state of current imbalance occurs in detection zero sequence current mutual inductor, earth leakage protective integrated circuit hair
Control signal makes MCU issue corresponding shutdown signal to the relay, the relay is used for the MCU accordingly out
The power supply of the instant-heating water drinking machine is turned off when receiving shutdown signal.
2. leakage protection circuit according to claim 1, it is characterised in that: the MCU is also connected with display screen.
3. leakage protection circuit according to claim 2, it is characterised in that: the display screen is that LED display or LCD are aobvious
Display screen.
4. described in any item leakage protection circuits according to claim 1~3, it is characterised in that: the integrated electricity of the earth leakage protective
The chip model M54123 on road.
5. leakage protection circuit according to claim 4, it is characterised in that: the model 12C5A60S2 of the MCU.
6. leakage protection circuit according to claim 4, it is characterised in that: the model of the zero sequence current mutual inductor
HDZ18L-1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099469.3U CN209282820U (en) | 2019-01-21 | 2019-01-21 | A kind of leakage protection circuit applied to instant-heating water drinking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920099469.3U CN209282820U (en) | 2019-01-21 | 2019-01-21 | A kind of leakage protection circuit applied to instant-heating water drinking machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282820U true CN209282820U (en) | 2019-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920099469.3U Expired - Fee Related CN209282820U (en) | 2019-01-21 | 2019-01-21 | A kind of leakage protection circuit applied to instant-heating water drinking machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209282820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829353A (en) * | 2019-10-15 | 2020-02-21 | 广东德涞节能设备有限公司 | Circuit structure of water dispenser |
-
2019
- 2019-01-21 CN CN201920099469.3U patent/CN209282820U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829353A (en) * | 2019-10-15 | 2020-02-21 | 广东德涞节能设备有限公司 | Circuit structure of water dispenser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190820 Termination date: 20220121 |