CN216204385U - High-safety electric water heater - Google Patents
High-safety electric water heater Download PDFInfo
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- CN216204385U CN216204385U CN202122355176.7U CN202122355176U CN216204385U CN 216204385 U CN216204385 U CN 216204385U CN 202122355176 U CN202122355176 U CN 202122355176U CN 216204385 U CN216204385 U CN 216204385U
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Abstract
The utility model provides a high-safety electric water heater, which comprises a load control module; the load control module comprises a live wire terminal, a zero line terminal, a ground wire detection circuit, a switching power supply circuit, a first voltage stabilizing circuit, a first MCU (microprogrammed control unit), a heating tube, a relay and a relay drive circuit; the input end of the ground wire detection circuit is connected with the live wire terminal, the zero wire terminal and the ground wire terminal, and the output end of the ground wire detection circuit is connected to the first MCU main control unit; the control output end of the first MCU main control unit is connected to the relay through the relay drive circuit; one end of the heating tube is connected with the zero line terminal, and the other end of the heating tube is connected with the live wire terminal through the relay. The utility model detects the ground wire connection of the external power supply through the ground wire detection circuit, and when the ground wire is in wrong wiring, the heating pipe of the electric water heater is not connected, thereby ensuring that the hidden danger of electric leakage is eliminated and improving the safety of the electric water heater.
Description
Technical Field
The utility model relates to the field of electric water heaters, in particular to an electric water heater with high safety.
Background
With the improvement of living standard, electric water heaters have become common household appliances for people. The existing water storage type electric water heater on the market at present does not have the function of detecting a power supply ground wire although the existing water storage type electric water heater has the function of detecting electric leakage; if the ground wires of the sockets of the residences of some users are not connected or are not well contacted, the whole machine is not grounded, and the potential safety hazard of electric leakage exists. In addition, when a person falls down during bathing and the body of the person is consciously not flicked, the electric water heater cannot be turned off, and the continuous water discharge of the electric water heater easily causes secondary damage to people falling to the ground; especially, the elderly living alone have serious potential safety hazards when meeting the situations.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a high-safety electric water heater, which detects the ground connection of an external power supply during operation to ensure that the potential leakage is eliminated and the safety of the electric water heater is improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an electric water heater with high safety comprises a load control module; the load control module comprises a live wire terminal, a zero line terminal, a ground wire detection circuit, a switching power supply circuit, a first voltage stabilizing circuit, a first MCU (microprogrammed control unit), a heating tube, a relay and a relay drive circuit;
the input end of the switching power supply circuit is connected with the live wire terminal and the zero line terminal, and the output end of the switching power supply circuit is connected with the first voltage stabilizing circuit and is respectively in power supply connection with the first MCU main control unit, the ground wire detection circuit, the relay and the relay drive circuit through the first voltage stabilizing circuit;
the input end of the ground wire detection circuit is connected with the live wire terminal, the zero wire terminal and the ground wire terminal, and the output end of the ground wire detection circuit is connected to the first MCU main control unit; the control output end of the first MCU main control unit is connected to the relay through the relay drive circuit;
one end of the heating tube is connected with the zero line terminal, and the other end of the heating tube is connected with the live wire terminal through the relay.
Furthermore, the load control module further comprises a water outlet temperature sensor and a water inlet temperature sensor, wherein the water outlet temperature sensor and the water inlet temperature sensor are respectively connected with the first MCU main control unit and used for detecting the temperatures of a water inlet end and a water outlet end of the electric water heater.
Furthermore, the heating tubes are multiple, the power of each heating tube is different, and the heating tubes are connected with the relay respectively.
And the display and control panel is connected with the load control module through a first communication circuit.
Furthermore, the first communication circuit is in communication connection with the first MCU main control unit and is in power supply connection with the first voltage stabilizing circuit.
Further, the first communication circuit is one of a serial communication circuit, a single-wire communication circuit or a multi-wire communication circuit.
Furthermore, the display and control panel comprises a second MCU main control unit, a key circuit, a second voltage stabilizing circuit, a display driving circuit and a display screen;
the first communication circuit is connected with the second voltage stabilizing circuit and is respectively in power supply connection with the second MCU main control unit, the display driving circuit and the display screen through the second voltage stabilizing circuit; the first communication circuit is also in communication connection with the second MCU main control unit;
the key circuit is connected to the control input end of the second MCU main control unit, and the display output end of the second MCU main control unit is connected to the display screen through the display driving circuit.
Furthermore, the display screen is a digital screen, an LCD screen or a TFT screen.
Further, the system also comprises a voice interaction module; and the voice interaction module is connected with a second MCU main control unit of the display and control panel through a second communication circuit.
Further, the second communication circuit is a serial communication circuit.
According to the high-safety electric water heater, the ground wire connection of the external power supply is detected through the ground wire detection circuit, and when the ground wire is in wrong wiring, the heating pipe of the electric water heater is not connected, so that the potential leakage hazard is eliminated, and the safety of the electric water heater is improved. Meanwhile, the utility model also has a voice interaction function, and can control the electric water heater through a voice instruction; when a person falls down during bathing and the body of the person is conscious but cannot move, the electric water heater can be controlled to be turned off through voice instructions, and the safety of the person in danger is further enhanced.
Drawings
Fig. 1 is a circuit structure diagram of an electric water heater with high safety provided by an embodiment of the utility model.
Fig. 2 is a circuit configuration diagram of a load control module in the embodiment of the present invention.
Fig. 3 is a circuit structure diagram of the display and control panel in the embodiment of the utility model.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an electric water heater with high safety provided by an embodiment of the present invention includes a load control module, a first communication circuit, a display and control panel, a second communication circuit, and a voice interaction module, which are connected in sequence.
The load control module is used for supplying power to a heating pipe of the electric water heater and controlling the on-off state of the electric water heater according to the ground wire connection state of an external power supply. The display and control panel is used for displaying the working state of the electric water heater and providing operation keys to adjust the working state of the electric water heater. The voice interaction module is used for adjusting the working state of the electric water heater in a voice interaction mode.
Specifically, as shown in fig. 2, the load control module includes a live wire terminal ACL, a null wire terminal ACN, a ground wire terminal GND, a ground wire detection circuit, a switching power supply circuit, a first voltage stabilizing circuit, a first MCU main control unit, a heating tube, a relay, and a relay driving circuit;
the input end of the switch power supply circuit is connected with a live wire terminal ACL and a zero line terminal ACN, and the output end of the switch power supply circuit is connected with a first voltage stabilizing circuit and is respectively in power supply connection with a first MCU main control unit, a ground wire detection circuit, a relay and a relay drive circuit through the first voltage stabilizing circuit;
the input end of the ground wire detection circuit is connected with a live wire terminal ACL, a zero line terminal ACN and a ground wire terminal GND, and the output end of the ground wire detection circuit is connected to the first MCU main control unit; the control output end of the first MCU main control unit is connected to the relay through the relay drive circuit;
one end of the heating tube is connected with a zero line terminal ACN, and the other end of the heating tube is connected with a live line terminal ACL through a relay;
the ground wire detection circuit detects the connection state of a ground wire terminal GND and an external ground wire; the first MCU main control unit controls the relay through the relay driving circuit according to the detection result of the ground wire detection circuit, and then controls the on-off state of the heating tube.
Furthermore, the load control module further comprises a water outlet temperature sensor and a water inlet temperature sensor, wherein the water outlet temperature sensor and the water inlet temperature sensor are respectively connected with the first MCU main control unit and used for detecting the temperatures of a water inlet end and a water outlet end of the electric water heater. The temperatures detected by the water outlet temperature sensor and the water inlet temperature sensor can be displayed through the display and control panel on one hand, and can also be used for assisting in automatically controlling the temperature of water in the electric water heater on the other hand, for example, when the temperature is lower than a certain threshold value, the power supply is automatically turned off when the temperature reaches the certain threshold value, and the like.
Furthermore, the heating tubes are multiple, the power of each heating tube is different, and the heating tubes are connected with the relay respectively. In this embodiment, there are two heat generating tubes with power of 1000W and 2000W, respectively, to cope with different heating needs.
Preferably, in the load control module, the first voltage regulator circuit is an LDO voltage regulator circuit, and the relay driver circuit adopts an UL2003 driver circuit.
Furthermore, the first communication circuit is in communication connection with the first MCU main control unit and is in power supply connection with the first voltage stabilizing circuit. In this embodiment, the first communication circuit is one of a serial communication circuit, a single-wire communication circuit, or a multi-wire communication circuit.
As shown in fig. 3, the display and control panel includes a second MCU main control unit, a key circuit, a second voltage stabilizing circuit, a display driving circuit, and a display screen;
the first communication circuit is connected with the second voltage stabilizing circuit and is respectively in power supply connection with the second MCU main control unit, the display driving circuit and the display screen through the second voltage stabilizing circuit; the first communication circuit is also in communication connection with the second MCU main control unit;
the key circuit is connected to the control input end of the second MCU main control unit, and the display output end of the second MCU main control unit is connected to the display screen through the display driving circuit.
Preferably, in the display and control panel, the second voltage regulator circuit is an LDO voltage regulator circuit. The display screen can be a digital screen, an LCD screen or a TFT screen. The keys in the key circuit can adopt spring touch keys, soft touch keys or directly adopt a touch circuit in a touch screen. And the key circuit is provided with a key for turning on or off the ground wire detection function, and the key is used for controlling whether the first MCU main control unit controls the on-off of the heating tube according to the wiring signal detected by the ground wire detection circuit.
Furthermore, the second communication circuit is connected with the second MCU main control unit. In this embodiment, the second communication circuit is a serial communication circuit. The voice interaction module is linked with the display and control panel through the serial port communication circuit, and more various control modes are realized.
The working process of the utility model is as follows:
after the load control module is connected to the commercial power, the switch power supply circuit provides voltage, and after the voltage is stabilized by the first voltage stabilizing circuit, the power is supplied to each circuit and each component, and the whole system starts to work: firstly, a ground wire detection circuit detects whether the connection of a zero wire, a live wire and a ground wire is normal or not, and if the connection is detected to be abnormal, the heating pipe of the electric water heater is not started to work.
Specifically, because a voltage difference exists between the live wire and the zero wire and between the live wire and the ground wire, the high voltage can be converted into a level signal after being subjected to voltage reduction and isolation in the ground wire detection circuit. When the wiring is correct and the ground wire is detected to be accessed, the level signal output by the ground wire detection circuit is in a high level, and when the wiring is wrong and no ground wire is detected to be accessed, the level signal output by the ground wire detection circuit is in a low level. The first MCU main control unit sends different control signals according to the received high-low level signals, if the high level signals are received, the heating tube is controlled to be opened through the relay, and if the low level signals are received, the relay is disconnected and closed, so that safe electricity utilization is ensured. The user can also select to turn on or off the ground wire detection function through the corresponding keys on the display and control panel.
Under the working state, the load control module receives the instruction of the display and control panel in real time, starts the related load work, and feeds back and sends the temperature information, the display information, the fault information and other information to the display and control panel in real time for further processing.
The voice interaction module monitors a voice control instruction sent by a user in real time, sends the instruction to the display and control panel, further converts the instruction into a control signal and sends the control signal to the load control module for execution. And meanwhile, receiving real-time feedback information of the load control module, displaying and carrying out next processing judgment by using the display and control panel, and sending result information after processing judgment back to the voice interaction module for voice broadcasting feedback.
According to the high-safety electric water heater, the ground wire connection of the external power supply is detected through the ground wire detection circuit, and when the ground wire is in wrong wiring, the heating pipe of the electric water heater is not connected, so that the potential leakage hazard is eliminated, and the safety of the electric water heater is improved. Meanwhile, the utility model also has a voice interaction function, and can control the electric water heater through a voice instruction; when a person falls down during bathing and the body of the person is conscious but cannot move, the electric water heater can be controlled to be turned off through voice instructions, and the safety of the person in danger is further enhanced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The high-safety electric water heater is characterized by comprising a load control module; the load control module comprises a live wire terminal, a zero line terminal, a ground wire detection circuit, a switching power supply circuit, a first voltage stabilizing circuit, a first MCU (microprogrammed control unit), a heating tube, a relay and a relay drive circuit;
the input end of the switching power supply circuit is connected with the live wire terminal and the zero line terminal, and the output end of the switching power supply circuit is connected with the first voltage stabilizing circuit and is respectively in power supply connection with the first MCU main control unit, the ground wire detection circuit, the relay and the relay drive circuit through the first voltage stabilizing circuit;
the input end of the ground wire detection circuit is connected with the live wire terminal, the zero wire terminal and the ground wire terminal, and the output end of the ground wire detection circuit is connected to the first MCU main control unit; the control output end of the first MCU main control unit is connected to the relay through the relay drive circuit;
one end of the heating tube is connected with the zero line terminal, and the other end of the heating tube is connected with the live wire terminal through the relay.
2. The high-safety electric water heater according to claim 1, wherein the load control module further comprises an outlet water temperature sensor and an inlet water temperature sensor, and the outlet water temperature sensor and the inlet water temperature sensor are respectively connected to the first MCU main control unit for detecting the temperatures of the inlet water end and the outlet water end of the electric water heater.
3. The high-safety electric water heater according to claim 1, wherein the heating tube has a plurality of heating tubes, each heating tube has a different power, and the plurality of heating tubes are respectively connected to the relay.
4. The high-safety electric water heater according to claim 1, further comprising a display and control panel, wherein the display and control panel is connected to the load control module through the first communication circuit.
5. The high-safety electric water heater according to claim 4, wherein the first communication circuit is in communication connection with the first MCU main control unit and is in power supply connection with the first voltage stabilizing circuit.
6. The high-safety electric water heater according to claim 5, wherein the first communication circuit is one of a serial communication circuit, a single-wire communication circuit or a multi-wire communication circuit.
7. The high-safety electric water heater according to claim 5, wherein the display and control panel comprises a second MCU main control unit, a key circuit, a second voltage stabilizing circuit, a display driving circuit and a display screen;
the first communication circuit is connected with the second voltage stabilizing circuit and is respectively in power supply connection with the second MCU main control unit, the display driving circuit and the display screen through the second voltage stabilizing circuit; the first communication circuit is also in communication connection with the second MCU main control unit;
the key circuit is connected to the control input end of the second MCU main control unit, and the display output end of the second MCU main control unit is connected to the display screen through the display driving circuit.
8. The high-safety electric water heater according to claim 7, wherein the display screen is a digital screen, an LCD screen or a TFT screen.
9. The high-safety electric water heater according to claim 7, further comprising a voice interaction module; and the voice interaction module is connected with a second MCU main control unit of the display and control panel through a second communication circuit.
10. The high-safety electric water heater according to claim 9, wherein the second communication circuit is a serial communication circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355176.7U CN216204385U (en) | 2021-09-27 | 2021-09-27 | High-safety electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355176.7U CN216204385U (en) | 2021-09-27 | 2021-09-27 | High-safety electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216204385U true CN216204385U (en) | 2022-04-05 |
Family
ID=80925761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122355176.7U Active CN216204385U (en) | 2021-09-27 | 2021-09-27 | High-safety electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216204385U (en) |
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2021
- 2021-09-27 CN CN202122355176.7U patent/CN216204385U/en active Active
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