CN211701460U - Leakage protector for water heater - Google Patents
Leakage protector for water heater Download PDFInfo
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- CN211701460U CN211701460U CN201921954225.5U CN201921954225U CN211701460U CN 211701460 U CN211701460 U CN 211701460U CN 201921954225 U CN201921954225 U CN 201921954225U CN 211701460 U CN211701460 U CN 211701460U
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Abstract
The utility model discloses a water heater earth-leakage protector relates to the electrical safety field, include: the water heater earth-leakage protector includes: the leakage protection device comprises an action module, a leakage protection control module, a leakage detection module, a heat preservation detection module and a switching power supply module; the heat preservation detection module is used for detecting the working state of the water heater: when the water heater is in a heat preservation state, the heat preservation detection module outputs a heat preservation signal; when the water heater is in a heating state, the heat preservation detection module outputs a heating signal; compared with the prior art, the switching power supply module and the heat preservation detection module are arranged on the leakage protector, so that a relatively stable working environment is provided for the switching power supply module and the heat preservation detection module, the switching power supply module and the heat preservation detection module are far away from a high-temperature and high-humidity water heater, the probability of faults of the switching power supply module and the heat preservation detection module is reduced, potential safety hazards are eliminated, and the use safety is further improved; and the heat preservation detection module does not perform independent electrical isolation any more, but shares the measure of electrical isolation with the whole leakage protector.
Description
Technical Field
The utility model relates to a earth-leakage protector technical field especially relates to a water heater earth-leakage protector.
Background
Along with the improvement of living standard, the popularization rate of household water heaters is higher and higher, and the electric shock event of using the water heaters is also rare, so that the water heaters need a leakage protector to protect the safety of users, and the existing leakage protector has defects.
A bidirectional control leakage protector for a water heater, as disclosed in Chinese utility model CN208349589U, relates to the electrical safety field, including: the low-voltage power supply module is connected with the water heater controller; the leakage protector is used for switching off or switching on a power supply; the low-voltage power supply module is used for supplying power to the water heater controller; the water heater controller can send out a power-off signal, and the leakage protector cuts off the power supply after receiving the power-off signal; the utility model uses the low voltage power supply module to supply power for the water heater controller, but the low voltage power supply module is placed in the water heater, and the requirement of the power supply module on the environment is higher, the power supply module of the utility model is placed in the water heater with high temperature and high humidity, and potential safety hazard exists;
the existing water heater is provided with a detection circuit for detecting the working state of the water heater and a control board of the water heater together, but the detection circuit is powered by 220V mains supply, and according to the relevant national regulations, a part powered by the 220V mains supply needs to have corresponding protection measures to prevent a user from having the possibility of directly contacting the 220V mains supply, so that the detection circuit needs to be separately electrically isolated, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
First, technical problem to be solved
Aiming at the defects in the prior art, how to further improve the safety of the leakage protector of the water heater.
Second, technical scheme
In order to solve the above problems, a leakage protector for a water heater is provided, which comprises: the leakage protection device comprises an action module, a leakage protection control module, a leakage detection module, a heat preservation detection module and a switching power supply module;
the action module is used for switching off or switching on the power supply;
the leakage protection control module is used for controlling the action module to switch off or switch on the power supply;
the leakage detection module is used for detecting whether the live wire and the zero wire leak electricity or not, when the leakage is detected, the leakage detection module sends out a leakage signal, and after the leakage protection control module receives the leakage signal, the leakage protection control module controls the action module to disconnect the power supply;
the switching power supply module is used for providing low-voltage direct-current working voltage for the water heater;
the heat preservation detection module is used for detecting the working state of the water heater:
when the water heater is in a heat preservation state, the heat preservation detection module outputs a heat preservation signal;
when the water heater is in a heating state, the heat preservation detection module outputs a heating signal.
Wherein, the heat preservation detection module includes the isolation module, and the isolation module is used for electrical isolation.
The first end of the heat preservation detection module is electrically connected with the zero line, and the second end of the heat preservation detection module is electrically connected with the fire line end of the electric heating tube.
When the electric heating pipe works, the heat preservation detection module outputs a heating signal; when the electric heating pipe does not work, the heat preservation detection module outputs a heat preservation signal.
Wherein, the isolation module is an optical coupler.
Wherein, the display module communication of heat preservation detection module and water heater is connected:
when the heat preservation detection module outputs a heat preservation signal, the display module displays that the water heater is in a heat preservation state;
when the heat preservation detection module outputs a heating signal, the display module displays that the water heater is in a heating state.
Wherein, the electric leakage detection module is a mutual inductor.
Thirdly, the beneficial effects of the utility model
The switching power supply module and the heat preservation detection module are arranged on the leakage protector, so that a relatively stable working environment is provided for the switching power supply module and the heat preservation detection module, the leakage protector is far away from a high-temperature and high-humidity water heater, the failure probability of the switching power supply module and the heat preservation detection module is reduced, potential safety hazards are eliminated, and the use safety is further improved; and the heat preservation detection module does not perform electrical isolation independently, but shares the electrical isolation with the whole leakage protector, so that the resource utilization rate is improved, and the manufacturing cost of the water heater control board is reduced.
Drawings
Fig. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a circuit diagram of the leakage protector of the present invention;
fig. 3 is a circuit diagram of a switching power supply module of the present invention;
FIG. 4 is a circuit diagram of the heat preservation detection circuit of the present invention;
fig. 5 is a first circuit diagram of the temperature display module of the present invention;
fig. 6 is a circuit diagram of a temperature display module of the present invention;
fig. 7 is a third circuit diagram of the temperature display module of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1-7, after power is turned on, the switching power supply module disposed in the earth leakage protector provides 5V dc operating voltage for the temperature display module of the water heater.
When the mutual inductor ZCT1 detects leakage current, the singlechip U1 disconnects the switch S1 through the silicon controlled rectifier SCR;
the heat preservation detection module is arranged in the leakage protector, and the heat preservation detection module is respectively electrically connected with the zero line and the live wire end of the electric heating tube and used for detecting whether the electric heating tube works:
when the electric heating pipe works, namely the water heater is in a heating state, the heat preservation detection module sends a heating signal to the single chip microcomputer U5 through the func port, and the single chip microcomputer U5 controls the heating indicator lamp LED1 to light up after receiving the signal, wherein in the embodiment, the heating signal is a continuous 50hz pulse signal;
when the electric heating pipe is not in operation, namely the water heater is in a heat preservation state, the heat preservation detection module sends a heat preservation signal to the single chip microcomputer U5 through the func port, and the single chip microcomputer U5 controls the heat preservation indicator lamp LED2 to light after receiving the signal, wherein in the embodiment, the heating signal is a continuous high level signal;
the heat preservation detection module is provided with opto-coupler U4 for electrical isolation, improves the security.
The single chip microcomputer U5 detects the water temperature value in the water heater water container through the temperature sensor and controls the nixie tube DS1 to display the water temperature value detected by the temperature sensor.
The water heater is also provided with a temperature limiter, and when the temperature in the water heater exceeds a preset value, the temperature limiter disconnects the power supply;
the water heater is also provided with a mechanical temperature controller, and the temperature controller enables the water temperature in the water container of the water heater to be within a preset range by controlling the working state of the electric heating tube.
The switching power supply module and the heat preservation detection module are arranged on the leakage protector, so that a relatively stable working environment is provided for the switching power supply module and the heat preservation detection module, the leakage protector is far away from a high-temperature and high-humidity water heater, the failure probability of the switching power supply module and the heat preservation detection module is reduced, potential safety hazards are eliminated, and the use safety is further improved; and the heat preservation detection module does not perform electrical isolation independently, but shares the electrical isolation with the whole leakage protector, so that the resource utilization rate is improved, and the manufacturing cost of the water heater control board is reduced.
The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (7)
1. A water heater earth leakage protector, characterized in that, the water heater earth leakage protector includes: the leakage protection device comprises an action module, a leakage protection control module, a leakage detection module, a heat preservation detection module and a switching power supply module;
the action module is used for switching off or switching on a power supply;
the leakage protection control module is used for controlling the action module to be switched off or switched on;
the leakage detection module is used for detecting whether the live wire and the zero wire leak electricity or not, when the leakage is detected, the leakage detection module sends out a leakage signal, and after the leakage protection control module receives the leakage signal, the leakage protection control module controls the action module to disconnect the power supply;
the switching power supply module is used for providing low-voltage direct-current working voltage for the water heater;
the heat preservation detection module is used for detecting the working state of the water heater:
when the water heater is in a heat preservation state, the heat preservation detection module outputs a heat preservation signal;
when the water heater is in a heating state, the heat preservation detection module outputs a heating signal.
2. A water heater earth-leakage protector as claimed in claim 1, wherein said insulation detection module comprises an isolation module for electrical isolation.
3. The leakage protector for water heater of claim 2, wherein the first end of the thermal insulation detecting module is electrically connected to the zero line, and the second end of the thermal insulation detecting module is electrically connected to the live line end of the electrothermal tube.
4. A leakage protector for water heater as claimed in claim 3, wherein when the electric heating tube is in operation, the heat preservation detecting module outputs a heating signal; when the electric heating pipe does not work, the heat preservation detection module outputs a heat preservation signal.
5. A water heater earth leakage protector as claimed in claim 2, wherein said isolation module is an opto-coupler.
6. A leakage protector for water heaters as claimed in claim 1, wherein the heat preservation detection module is in communication connection with a display module of the water heater:
when the heat preservation detection module outputs a heat preservation signal, the display module displays that the water heater is in a heat preservation state;
when the heat preservation detection module outputs a heating signal, the display module displays that the water heater is in a heating state.
7. A water heater leakage protector as claimed in claim 1, wherein said leakage detection module is a transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921954225.5U CN211701460U (en) | 2019-11-13 | 2019-11-13 | Leakage protector for water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921954225.5U CN211701460U (en) | 2019-11-13 | 2019-11-13 | Leakage protector for water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211701460U true CN211701460U (en) | 2020-10-16 |
Family
ID=72786857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921954225.5U Active CN211701460U (en) | 2019-11-13 | 2019-11-13 | Leakage protector for water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211701460U (en) |
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2019
- 2019-11-13 CN CN201921954225.5U patent/CN211701460U/en active Active
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