CN109088394A - Electric water heater - Google Patents
Electric water heater Download PDFInfo
- Publication number
- CN109088394A CN109088394A CN201710444148.8A CN201710444148A CN109088394A CN 109088394 A CN109088394 A CN 109088394A CN 201710444148 A CN201710444148 A CN 201710444148A CN 109088394 A CN109088394 A CN 109088394A
- Authority
- CN
- China
- Prior art keywords
- nmos tube
- grid
- connects
- tube
- source electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
Abstract
The invention belongs to technical field of automatic control, more particularly to a kind of electric water heater.A kind of electric water heater of the invention, including power switch and heating device, which is characterized in that further include water level sensor, current detection circuit and control switch；The heating device is connected with power switch；The input terminal of the output termination current detection circuit of the water level sensor；The input terminal of the output termination control switch of the current detection circuit；The control switch is connected with power switch.Beneficial effects of the present invention are to realize and automatically power off when electric water heater is used, and greatly improve the safety of electric water heater, user is made thoroughly to be without fear of an attack from the rear, be conducive to the popularization of electric water heater.Present invention is particularly suitable for electric water heaters.
Description
Technical field
The invention belongs to technical field of automatic control, more particularly to a kind of electric water heater.
Background technique
Electric water heater is because its convenience is widely used, but the reason of because of its heating method, at present
Most people can query its safety, be hindered so as to cause the further genralrlization of electric water heater.Mesh
Preceding electric water heater generally has earth leakage protective device, but the principle of the earth leakage protective device generallyd use is, real
When detect whether the electric current of leakage, if detecting the electric current of leakage, turn off power supply, realize the mesh of power-off protection
's.And at present this power-off protection apparatus the problem is that, have occurred and that electric leakage accident just disconnects power supply, then user possibility
Certain injury is born because leaking electricity moment, and then may lost the confidence to electric water heater.
Summary of the invention
It is to be solved by this invention, aiming at the above problem, propose a kind of electric water heater.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of electric water heater, including power switch and heating device, which is characterized in that further include water level induction
Device, current detection circuit and control switch；The heating device is connected with power switch；The output of the water level sensor terminates
The input terminal of current detection circuit；The input terminal of the output termination control switch of the current detection circuit；The control switch
It is connected with power switch；
The current detection circuit is by the first PMOS tube MP1, the second PMOS tube MP2, third PMOS tube MP3, the 4th PMOS
Pipe MP4, the 5th PMOS tube MP5, the 6th PMOS tube MP6, the first NMOS tube MN1, the second NMOS tube MN2, third NMOS tube MN3,
4th NMOS tube MN4, the 5th NMOS tube MN5, the 6th NMOS tube MN6, first resistor R, second resistance R2, the first triode Q1,
Second triode Q2, capacitor C and switch S are constituted；The output end of water level sensor is followed by the first triode by first resistor R1
The base stage of Q1；The emitter of first triode Q1 connects drain electrode and the emitter of the second triode Q2 of the second PMOS tube MP2, collection
Electrode connects the drain electrode of the 5th NMOS tube MN5 and the source electrode of third NMOS tube MN3；The source electrode of second PMOS tube MP2 connects power supply, grid
Pole connects the grid of the first PMOS tube MP1；The grid and drain interconnection of first PMOS tube MP1, source electrode connect power supply, and drain electrode connects the
The drain electrode of two NMOS tube MN2；The grid of second NMOS tube MN2 connects the grid of the first NMOS tube MN1, source electrode ground connection；First
The grid and drain interconnection of NMOS tube MN1, drain electrode connect power supply, source electrode ground connection；The source electrode of third PMOS tube MP3 connects power supply,
Its grid and drain interconnection, drain electrode connect the drain electrode of third NMOS tube MN3；The grid of third NMOS tube MN3 connects the 4th NMOS tube
The grid of MN4, source electrode connect the drain electrode of the 5th NMOS tube MN5；The grid of 5th NMOS tube MN5 connects the grid of the second NMOS tube MN2
Pole, source electrode ground connection；The source electrode of 4th PMOS tube MP4 connects power supply, and drain electrode connects the grid and the 4th NMOS of the 7th NMOS tube MN7
The drain electrode of pipe MN4；The source electrode of 4th NMOS tube MN4 is grounded the drain electrode of the collector and the 6th NMOS tube MN6 of the second triode Q2；
The grid of 6th NMOS tube MN6 connects the grid of the 5th NMOS tube MN5, source electrode ground connection；The source electrode of 5th PMOS tube MP5 connects electricity
Source, grid and drain interconnection, grid connect the grid of the 6th PMOS tube MP6, and drain electrode connects the drain electrode of the 7th NMOS tube MN7；
The source electrode of 7th NMOS tube MN7 connects the base stage of the second triode Q2, and source electrode is grounded after passing through second resistance R2；6th PMOS tube
The source electrode of MP6 connects power supply, and drain electrode after capacitor C by being grounded；Capacitor C and switch S is in parallel；6th PMOS tube MP6 is drained and is opened
The tie point for closing S and capacitor C connects control switch.
Beneficial effects of the present invention are to realize and automatically power off when electric water heater is used, greatly improve
The safety of electric water heater, makes user thoroughly be without fear of an attack from the rear, and is conducive to the popularization of electric water heater.
Detailed description of the invention
Fig. 1 is logical construction schematic diagram of the invention；
Fig. 2 is the electrical block diagram of current detection circuit in the present invention.
Specific embodiment
As shown in Figure 1, a kind of electric water heater of the invention, including power switch and heating device, feature exist
In further including water level sensor, current detection circuit and control switch；The heating device is connected with power switch；The water
The input terminal of the output termination current detection circuit of position inductor；The output of the current detection circuit terminates the defeated of control switch
Enter end；The control switch is connected with power switch；
As shown in Fig. 2, the current detection circuit is by the first PMOS tube MP1, the second PMOS tube MP2, third PMOS tube
MP3, the 4th PMOS tube MP4, the 5th PMOS tube MP5, the 6th PMOS tube MP6, the first NMOS tube MN1, the second NMOS tube MN2,
Three NMOS tube MN3, the 4th NMOS tube MN4, the 5th NMOS tube MN5, the 6th NMOS tube MN6, first resistor R, second resistance R2,
One triode Q1, the second triode Q2, capacitor C and switch S are constituted；The output end of water level sensor is followed by by first resistor R1
The base stage of first triode Q1；The emitter of first triode Q1 connects the drain electrode of the second PMOS tube MP2 with the second triode Q2's
Emitter, collector connect the drain electrode of the 5th NMOS tube MN5 and the source electrode of third NMOS tube MN3；The source electrode of second PMOS tube MP2
Power supply is connect, grid connects the grid of the first PMOS tube MP1；The grid and drain interconnection of first PMOS tube MP1, source electrode connect electricity
Source, drain electrode connect the drain electrode of the second NMOS tube MN2；The grid of second NMOS tube MN2 connects the grid of the first NMOS tube MN1, source
Pole ground connection；The grid and drain interconnection of first NMOS tube MN1, drain electrode connect power supply, source electrode ground connection；Third PMOS tube MP3's
Source electrode connects power supply, grid and drain interconnection, and drain electrode connects the drain electrode of third NMOS tube MN3；The grid of third NMOS tube MN3 connects
The grid of 4th NMOS tube MN4, source electrode connect the drain electrode of the 5th NMOS tube MN5；The grid of 5th NMOS tube MN5 meets the 2nd NMOS
The grid of pipe MN2, source electrode ground connection；The source electrode of 4th PMOS tube MP4 connects power supply, and drain electrode connects the grid of the 7th NMOS tube MN7
With the drain electrode of the 4th NMOS tube MN4；The source electrode of 4th NMOS tube MN4 is grounded the collector and the 6th NMOS tube of the second triode Q2
The drain electrode of MN6；The grid of 6th NMOS tube MN6 connects the grid of the 5th NMOS tube MN5, source electrode ground connection；5th PMOS tube MP5's
Source electrode connects power supply, grid and drain interconnection, and grid connects the grid of the 6th PMOS tube MP6, and drain electrode meets the 7th NMOS tube MN7
Drain electrode；The source electrode of 7th NMOS tube MN7 connects the base stage of the second triode Q2, and source electrode is grounded after passing through second resistance R2；The
The source electrode of six PMOS tube MP6 connects power supply, and drain electrode after capacitor C by being grounded；Capacitor C and switch S is in parallel；6th PMOS tube MP6
Drain electrode and the tie point of switch S and capacitor C connect control switch.
The operation principle of the present invention is that:
The device of the invention increases water level sensor in traditional electric water heater, passes through water level sensor
Whether the water in induction electric water heater liner changes to judge whether water heater is in use, water level induction
Device uses common water level sensor, principle be corresponding electric current is generated by the pressure change of water, and because than
The electric current that the less behavior of Water usage of such as washing one's hands may cause water level sensor generation is smaller, may there was only several milliamperes, and
Lead to not directly drive control switch movement, the present invention is also provided with current detection circuit, and current detection circuit can detecte
It is exported to small electric current, the switch S closure of current detection circuit under small electric current output, output end will export biggish
Signal is controlled to control switch, control switch can be opened using common electric signal switchs such as relays in the case where controlling signal,
And then control power switch and disconnect, to realize the purpose that electric water heater is just powered off with water, therefore the device of the invention
Power-off protection is just carried out not after electric leakage, but is preventive from possible trouble, is powered off when user's use, is then added when being not used
Heat not only will not influence the use of user, but also greatly improve the safety of electric water heater.
Claims (1)
1. electric water heater, including power switch and heating device, which is characterized in that further include water level sensor, electric current
Detection circuit and control switch；The heating device is connected with power switch；The output termination electric current inspection of the water level sensor
The input terminal of slowdown monitoring circuit；The input terminal of the output termination control switch of the current detection circuit；The control switch and power supply
Switch connection；The current detection circuit is by the first PMOS tube MP1, the second PMOS tube MP2, third PMOS tube MP3, the 4th PMOS
Pipe MP4, the 5th PMOS tube MP5, the 6th PMOS tube MP6, the first NMOS tube MN1, the second NMOS tube MN2, third NMOS tube MN3,
4th NMOS tube MN4, the 5th NMOS tube MN5, the 6th NMOS tube MN6, first resistor R, second resistance R2, the first triode Q1,
Second triode Q2, capacitor C and switch S are constituted；The output end of water level sensor is followed by the first triode by first resistor R1
The base stage of Q1；The emitter of first triode Q1 connects drain electrode and the emitter of the second triode Q2 of the second PMOS tube MP2, collection
Electrode connects the drain electrode of the 5th NMOS tube MN5 and the source electrode of third NMOS tube MN3；The source electrode of second PMOS tube MP2 connects power supply, grid
Pole connects the grid of the first PMOS tube MP1；The grid and drain interconnection of first PMOS tube MP1, source electrode connect power supply, and drain electrode connects the
The drain electrode of two NMOS tube MN2；The grid of second NMOS tube MN2 connects the grid of the first NMOS tube MN1, source electrode ground connection；First
The grid and drain interconnection of NMOS tube MN1, drain electrode connect power supply, source electrode ground connection；The source electrode of third PMOS tube MP3 connects power supply,
Its grid and drain interconnection, drain electrode connect the drain electrode of third NMOS tube MN3；The grid of third NMOS tube MN3 connects the 4th NMOS tube
The grid of MN4, source electrode connect the drain electrode of the 5th NMOS tube MN5；The grid of 5th NMOS tube MN5 connects the grid of the second NMOS tube MN2
Pole, source electrode ground connection；The source electrode of 4th PMOS tube MP4 connects power supply, and drain electrode connects the grid and the 4th NMOS of the 7th NMOS tube MN7
The drain electrode of pipe MN4；The source electrode of 4th NMOS tube MN4 is grounded the drain electrode of the collector and the 6th NMOS tube MN6 of the second triode Q2；
The grid of 6th NMOS tube MN6 connects the grid of the 5th NMOS tube MN5, source electrode ground connection；The source electrode of 5th PMOS tube MP5 connects electricity
Source, grid and drain interconnection, grid connect the grid of the 6th PMOS tube MP6, and drain electrode connects the drain electrode of the 7th NMOS tube MN7；
The source electrode of 7th NMOS tube MN7 connects the base stage of the second triode Q2, and source electrode is grounded after passing through second resistance R2；6th PMOS tube
The source electrode of MP6 connects power supply, and drain electrode after capacitor C by being grounded；Capacitor C and switch S is in parallel；6th PMOS tube MP6 is drained and is opened
The tie point for closing S and capacitor C connects control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710444148.8A CN109088394A (en) | 2017-06-13 | 2017-06-13 | Electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710444148.8A CN109088394A (en) | 2017-06-13 | 2017-06-13 | Electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109088394A true CN109088394A (en) | 2018-12-25 |
Family
ID=64838760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710444148.8A Pending CN109088394A (en) | 2017-06-13 | 2017-06-13 | Electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109088394A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205091711U (en) * | 2015-09-27 | 2016-03-16 | 陈露露 | Wireless mouse |
| CN205245589U (en) * | 2015-12-02 | 2016-05-18 | 广东尧圣太阳能科技有限公司 | Solar water -heating control system |
| CN106440393A (en) * | 2016-12-02 | 2017-02-22 | 余姚市嘉荣电子电器有限公司 | Intelligent effluent outage control system and method |
| CN106500358A (en) * | 2016-12-22 | 2017-03-15 | 佛山市顺德区奥荣电器实业有限公司 | A kind of electric heater security protection system and a kind of electric heater |
-
2017
- 2017-06-13 CN CN201710444148.8A patent/CN109088394A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205091711U (en) * | 2015-09-27 | 2016-03-16 | 陈露露 | Wireless mouse |
| CN205245589U (en) * | 2015-12-02 | 2016-05-18 | 广东尧圣太阳能科技有限公司 | Solar water -heating control system |
| CN106440393A (en) * | 2016-12-02 | 2017-02-22 | 余姚市嘉荣电子电器有限公司 | Intelligent effluent outage control system and method |
| CN106500358A (en) * | 2016-12-22 | 2017-03-15 | 佛山市顺德区奥荣电器实业有限公司 | A kind of electric heater security protection system and a kind of electric heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181225 |
|
| WD01 | Invention patent application deemed withdrawn after publication |