CN213873231U - Intelligent protection electric water heater - Google Patents
Intelligent protection electric water heater Download PDFInfo
- Publication number
- CN213873231U CN213873231U CN202022902154.3U CN202022902154U CN213873231U CN 213873231 U CN213873231 U CN 213873231U CN 202022902154 U CN202022902154 U CN 202022902154U CN 213873231 U CN213873231 U CN 213873231U
- Authority
- CN
- China
- Prior art keywords
- water heater
- module
- electric water
- electric
- wire end
- 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.)
- Active
Links
Images
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses an electric water heater of intelligence protection, include: get electric plug, control module and flow sensor module, control module includes: the second singlechip gets the electric plug and includes: the electric water heater comprises an L-phase bolt, an N-phase bolt, an E-phase bolt, a power supply module, an earth wire end of the electric water heater, and a first single chip microcomputer. Through setting up the direct current power supply line for control module still can normally work when electric water heater outage. The protection function of the electric water heater can still be finished without arranging an energy storage unit in the electric water heater, so that the power supply of the electric water heater is actively cut off. The utility model discloses mainly used electric water heater technical field.
Description
Technical Field
The utility model relates to an electric water heater technical field, in particular to electric water heater of intelligence protection.
Background
The protection aspect of the electric water heater is mainly protected by adopting two technical schemes in the prior art, one is a passive leakage protection technology: and a passive power-off technology is adopted, namely, the zero line and the live line of the power supply are disconnected only when electric leakage occurs and is detected. Another is an active leakage protection technique: after the water flow sensor collects the water using behavior of the user, the electric heater is driven to be powered off through logic control, and the electric shock of the user due to electric leakage is avoided.
The existing active leakage protection technical solutions generally include: the electric water heater comprises an electricity taking plug and a control module arranged in the electric water heater, wherein the electricity taking plug is generally provided with a second single chip microcomputer, and the electricity taking plug controls an earth leakage protection module through the second single chip microcomputer so as to cut off the power supply of the electric water heater. The control module of the whole active earth leakage protection technical scheme generally takes out electricity from the end of the electric water heater, when the electricity taking plug cuts off the electricity of the electric water heater, an energy storage unit needs to be integrated in the end of the electric water heater in order to keep the control module to continuously operate, and the integration of the energy storage unit can inevitably greatly increase the manufacturing cost and the space cost of the whole control module. Moreover, once the energy storage unit has a problem, the whole electric water heater cannot work normally, and the whole service life of the whole electric water heater is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric water heater of intelligence protection to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
The utility model provides a solution of its technical problem is: an intelligent protection electric water heater is provided, which comprises: get electric plug, control module and flow sensor module, the flow sensor module is used for perception electric water heater's water signal, control module includes: the second singlechip, it includes to get the electric plug: l looks bolt, N looks bolt, E looks bolt, power module, hourglass guarantor's module and first singlechip, L looks bolt is connected with electric water heater's live wire end through leaking guarantor's module, N looks bolt is connected with electric water heater's zero line end, E looks bolt is connected with electric water heater's ground wire end, power module gets the electricity from L looks bolt and N looks bolt and obtains the direct current, the direct current passes through the direct current power supply line and transmits for control module, the second singlechip is used for: and the first singlechip controls the leakage protection module to disconnect the electric connection between the L-phase plug pin and the live wire end of the electric water heater according to the first level instruction.
Further, the communication interface is a wireless communication interface or a wired communication interface.
Further, N looks bolt is connected with electric water heater's zero line end through leaking protecting the module, E looks bolt is connected with electric water heater's ground wire end through leaking protecting the module, the second singlechip is used for: the first single chip microcomputer controls the leakage protection module to disconnect the electric connection between the N-phase plug pin and the zero line end of the electric water heater according to the second level instruction; and transmitting a third level instruction to the first single chip microcomputer through the communication interface according to the water use signal sensed by the flow sensor module, and controlling the leakage protection module to disconnect the electric connection between the E-phase plug pin and the ground wire end of the electric water heater by the first single chip microcomputer according to the third level instruction.
Further, get the electric plug and still include the module that resets, first singlechip is connected with the module that resets, first singlechip still is used for: the control reset module restores the electric connection between the L-phase bolt and the live wire end of the electric water heater after being disconnected, the control reset module restores the electric connection between the N-phase bolt and the zero wire end of the electric water heater after being disconnected, and the control reset module restores the electric connection between the E-phase bolt and the ground wire end of the electric water heater after being disconnected.
Furthermore, the control module further comprises a relay module, the relay module is respectively connected with the second single chip microcomputer and an electric heating module of the electric water heater, a driving power supply of the relay module is obtained through a direct current power supply line, and a switch side of the relay module is connected in series between the electric heating module and a fire wire end and a zero wire end of the electric water heater.
Furthermore, the electric water heater of intelligence protection still includes voltage conversion module, voltage conversion module be used for the relay module or the second singlechip provides the voltage of adaptation, voltage conversion module sets up at control module or gets the electric plug.
Furthermore, the intelligent protection electric water heater also comprises a temperature sensor module, wherein the temperature sensor module is used for sensing the temperature of the water tank of the electric water heater, and the second single chip microcomputer is used for determining that the temperature of the water tank exceeds a preset temperature threshold value and controlling the relay module to cut off the power supply of the power-off heating module.
Further, the control module further comprises: and the operation module is connected with the second singlechip and is used for sending an operation instruction of a user to the second singlechip.
Further, the control module further comprises: and the display module is connected with the second singlechip and is used for displaying the information transmitted by the second singlechip.
Furthermore, the electric water heater of intelligent protection still includes thermal circuit breaker, thermal circuit breaker concatenates between the live wire end and the L looks bolt with electric water heater, thermal circuit breaker concatenates between the live wire end and the N looks bolt with electric water heater, thermal circuit breaker is used for responding to electric water heater's the temperature of electric heating module, works as when the temperature of electric water heater's electric heating module surpassed thermal circuit breaker thermal threshold value, then thermal circuit breaker breaks the electric connection between electric water heater's live wire end and the L looks bolt, and thermal circuit breaker breaks the electric connection between electric water heater's zero line end and the N looks bolt.
The utility model has the advantages that: through setting up the direct current power supply line for control module still can normally work when electric water heater outage. In addition, an energy storage unit is not required to be arranged in the electric water heater, the control module can still be matched with the first single chip microcomputer to complete the protection function of the electric water heater, so that the power supply of the electric water heater is actively cut off, the water consumption and electric leakage of a user are prevented, and the safety level is improved.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
FIG. 1 is a schematic structural diagram of an intelligent protection electric water heater for information transmission through wires;
FIG. 2 is a schematic structural diagram of an intelligent electric water heater with information transmission via a wireless module;
FIG. 3 is a schematic diagram of a system in which a voltage conversion module is disposed in an electric water heater;
fig. 4 is a schematic structural diagram of a system in which the voltage conversion module is disposed in the power-taking plug.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1 and 2, an intelligent protection electric water heater includes: get electric plug 100, control module 200 and flow sensor module 300, flow sensor module 300 is used for perceiving the water signal of electric water heater, control module 200 includes: the second single chip microcomputer 210, the power taking plug 100 includes: the electric water heater comprises an L-phase bolt 101, an N-phase bolt 102, an E-phase bolt 103, a power module 110, an anti-leakage module 130 and a first single chip microcomputer 120, wherein the L-phase bolt 101 is connected with a fire wire end of the electric water heater through the anti-leakage module 130, the N-phase bolt 102 is connected with a zero wire end of the electric water heater, the E-phase bolt 103 is connected with a ground wire end of the electric water heater, the power module 110 obtains direct current from the L-phase bolt 101 and the N-phase bolt 102, the direct current is transmitted to the control module 200 through a direct current power supply line 500, and the second single chip microcomputer 210 is used for: the first level instruction is transmitted to the first single chip microcomputer 120 through the communication interface according to the water use signal sensed by the flow sensor module 300, and the first single chip microcomputer 120 controls the leakage protection module 130 to disconnect the electrical connection between the L-phase plug pin 101 and the live wire end of the electric water heater according to the first level instruction. The communication interface refers to an interface mode for information transmission. Which may be a wired interface or a wireless interface. The wired interface refers to a transmission mode based on a communication line, and can transmit information based on an existing wired communication protocol or transmit information through a customized communication protocol. The wireless interface refers to a transmission mode based on wireless transmission, and the transmission is performed through a wireless module. Referring to fig. 2, fig. 2 is a schematic structural diagram of an intelligent protection electric water heater for information transmission through a wireless module. Fig. 2 does not require communication lines as compared to fig. 1. In some embodiments, the wireless transmitting module 104 is disposed on the power-taking plug 100, the wireless receiving module 105 is integrated with the control module 200, and the wireless transmitting module 104 and the wireless receiving module 105 are paired to realize wireless communication.
The leakage protection module 130 refers to a switch module that can be controlled to open.
In this embodiment, the power module 110 is disposed on the power-taking plug 100, and takes power from the L-phase plug 101 and the N-phase plug 102 to obtain direct current, which is transmitted to the control module 200 through the direct current power supply line 500. When the flow sensor module 300 senses a water usage signal. The water usage signal refers to a signal that a user is using the electric water heater and is thus asserted by the flow sensor module 300. The second single chip microcomputer 210 determines the water usage signal, that is, the second single chip microcomputer 210 knows the water usage of the user, and the second single chip microcomputer 210 outputs a first level instruction, wherein the first level instruction signal may be a level signal or a level pulse signal. The first level command signal is used for informing the first single chip microcomputer 120 to control the leakage protection module 130 to disconnect the electrical connection between the L-phase plug 101 and the live wire end of the electric water heater. After the first single chip microcomputer 120 determines the first instruction signal, the leakage protection module 130 is controlled to disconnect the electrical connection between the L-phase plug 101 and the live wire end of the electric water heater, so as to complete the protection process. After the L-phase plug 101 is disconnected from the live wire end of the electric water heater, the dc power supply line 500 continuously supplies power to the control module 200, so that the control module 200 can still normally operate after the electric water heater is disconnected.
According to the electric water heater power-off control system, the direct current power supply line 500 is arranged, so that the control module 200 can still normally work when the electric water heater is powered off. In addition, an energy storage unit is not required to be arranged in the electric water heater, and the control module 200 can still be matched with the first single chip microcomputer 120 to complete the protection function of the electric water heater.
In some embodiments, the intelligent protection electric water heater can control the N phase in addition to the L phase. The N-phase plug 102 is connected to a zero line end of the electric water heater through the leakage protection module 130, and the second single chip 210 is configured to: and transmitting a second level instruction to the first single chip microcomputer 120 through the communication interface according to the water consumption signal sensed by the flow sensor module 300, wherein the first single chip microcomputer 120 controls the leakage protection module 130 to disconnect the electric connection between the N-phase plug pin 102 and the zero line end of the electric water heater according to the second level instruction.
In some embodiments, the intelligent protection electric water heater can control the E phase in addition to the L phase and the N phase. The E-phase plug 103 is connected to a ground terminal of the electric water heater through the leakage protection module 130, and the second single chip 210 is configured to: and transmitting a third level instruction to the first single chip microcomputer 120 through the communication interface according to the water use signal sensed by the flow sensor module 300, and controlling the leakage protection module 130 to disconnect the electrical connection between the E-phase plug pin 103 and the ground wire end of the electric water heater by the first single chip microcomputer 120 according to the third level instruction.
In order to restore the electrical connection between the L-phase plug 101 and the live wire end of the electric water heater after disconnection, the electrical connection between the N-phase plug 102 and the live wire end of the electric water heater is restored after disconnection, and the electrical connection between the E-phase plug 103 and the ground wire end of the electric water heater is restored after disconnection. In some preferred embodiments, the power-taking plug 100 further includes a reset module 140, and the first single chip microcomputer 120 is connected to the reset module 140. In the process of using water, the second single chip microcomputer 210 continuously determines a water using signal, when the water using is finished, the water flow signal disappears for a certain time, the water using stop is determined, and the second single chip microcomputer 210 outputs the water using stop signal to the first single chip microcomputer 120 through the communication interface. After the first single chip microcomputer 120 determines the signal for stopping water consumption, the reset module 140 is controlled to restore the electrical connection between the L-phase plug pin 101 and the live wire end of the electric water heater after disconnection, the reset module 140 is controlled to restore the electrical connection between the N-phase plug pin 102 and the live wire end of the electric water heater after disconnection, and the reset module 140 is controlled to restore the electrical connection between the E-phase plug pin 103 and the ground wire end of the electric water heater after disconnection.
The communication between the first single-chip microcomputer 120 and the second single-chip microcomputer 210 further includes: after the first mcu 120 confirms that the first command signal, the second command signal and/or the third command signal are/is executed, the feedback is made to the second mcu 210 through the communication interface, so that the second mcu 210 can know the control status of the first mcu 120 in time.
When the electric water heater heats the water tank, the electric water heater is generally realized by controlling the electric heating module 700. It is generally adopted for controlling the electric heating module 700 that the electric heating module 700 is controlled by turning on and off the relay module 240. In order to make the integration degree of the control module 200 higher, in some preferred time instances, a relay module 240 is integrated in the control module 200, the relay module 240 is respectively connected with the second single chip microcomputer 210 and an electric heating module 700 of the electric water heater, a driving power supply of the relay module 240 is obtained through a direct current power supply line 500, and a switch side of the relay module 240 is connected in series between the electric heating module 700 and a live wire end and a neutral wire end of the electric water heater. Among them, since the driving voltages between the relay module 240 and the second single chip microcomputer 210 are not the same, referring to fig. 3, in some embodiments, the voltage conversion module 150 is disposed in the control module 200. The power is taken from the dc power line 500 through the voltage conversion module 150, and then the taken power is converted into a voltage adapted to the relay module 240 of the second mcu 210.
Of course, referring to fig. 4, in another embodiment, the voltage conversion module 150 is disposed on the power-taking plug 100, and an additional dc power supply line 500 is added to supply power to the relay module 240 or the second single chip 210.
In order to better limit the temperature of the water tank of the electric water heater, in some embodiments, a temperature sensor module 400 is added, the temperature sensor module 400 is used for sensing the temperature of the water tank of the electric water heater, and the second single chip microcomputer 210 is used for determining that the temperature of the water tank exceeds a preset temperature threshold value, and then controlling the relay module 240 to cut off the power supply of the electric heating module 700. The second single chip microcomputer 210 controls the relay module 240 to control the on-off of the electric heating module 700 so as to limit the temperature of the water tank.
In some embodiments, in order to increase the integration level of the control module 200, an operation module 230 may be integrated, where the operation module 230 refers to a module capable of realizing human-computer interaction, the operation module 230 is connected to the second single chip microcomputer 210, and the operation module 230 is configured to send an operation instruction of a user to the second single chip microcomputer 210. So that the second mcu 210 can know the user's requirement through the operation module 230. By integrating the operation module 230 and connecting the operation module 230 with the second single chip microcomputer 210, the integration level of the control module 200 can be higher, the reuse level of the second single chip microcomputer 210 can be improved, and the cost can be reduced.
In some embodiments, in order to increase the integration level of the control module 200, a display module 220 may be integrated in the control module 200, the display module 220 is connected to the second single chip microcomputer 210, and the display module 220 is configured to display information transmitted by the second single chip microcomputer 210. By integrating the display module 220 and connecting the display module 220 with the second single chip microcomputer 210, the integration level of the control module 200 can be higher, the reuse level of the second single chip microcomputer 210 can be improved, and the cost can be reduced. The first single chip microcomputer 120 and the second single chip microcomputer 210 can communicate with each other through communication, and the communication result is displayed through the display module 220. For example, when the first single chip microcomputer 120 cannot execute the first instruction signal, the second instruction signal and/or the third instruction signal, the second single chip microcomputer 210 may display the first instruction signal, the second instruction signal and/or the third instruction signal through the display module 220 to remind a user of a fault, so that the user can maintain the second single chip microcomputer in time.
In some embodiments, the electric water heater further comprises a thermal circuit breaker 600, the thermal circuit breaker 600 is connected in series between the live wire end of the electric water heater and the L-phase plug pin 101, the thermal circuit breaker 600 is connected in series between the live wire end of the electric water heater and the N-phase plug pin 102, the thermal circuit breaker 600 is used for sensing the temperature of the electric heating module 700 of the electric water heater, when the temperature of the electric heating module 700 of the electric water heater exceeds the thermal threshold of the thermal circuit breaker 600, the thermal circuit breaker 600 disconnects the electric connection between the live wire end of the electric water heater and the L-phase plug pin 101, and the thermal circuit breaker 600 disconnects the electric connection between the live wire end of the electric water heater and the N-phase plug pin 102. The arrangement of the thermal circuit breaker 600 is mainly to further protect the electric heating module 700 from overheating, and when the electric heating module 700 is overheated, the thermal circuit breaker 600 timely cuts off the power supply of the electric heating module, so as to protect the electric water heater.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and changes without departing from the spirit of the invention.
Claims (10)
1. An intelligent protection electric water heater is characterized by comprising: get electric plug, control module and flow sensor module, the flow sensor module is used for perception electric water heater's water signal, control module includes: the second singlechip, it includes to get the electric plug: l looks bolt, N looks bolt, E looks bolt, power module, hourglass guarantor's module and first singlechip, L looks bolt is connected with electric water heater's live wire end through leaking guarantor's module, N looks bolt is connected with electric water heater's zero line end, E looks bolt is connected with electric water heater's ground wire end, power module gets the electricity from L looks bolt and N looks bolt and obtains the direct current, the direct current passes through the direct current power supply line and transmits for control module, the second singlechip is used for: and the first singlechip controls the leakage protection module to disconnect the electric connection between the L-phase plug pin and the live wire end of the electric water heater according to the first level instruction.
2. The intelligent electric water heater according to claim 1, wherein the communication interface is a wireless communication interface or a wired communication interface.
3. The intelligent protection electric water heater according to claim 1, wherein the N-phase plug is connected to a zero line end of the electric water heater through an underdrain protection module, the E-phase plug is connected to a ground line end of the electric water heater through the underdrain protection module, and the second single chip is configured to: the first single chip microcomputer controls the leakage protection module to disconnect the electric connection between the N-phase plug pin and the zero line end of the electric water heater according to the second level instruction; and transmitting a third level instruction to the first single chip microcomputer through the communication interface according to the water use signal sensed by the flow sensor module, and controlling the leakage protection module to disconnect the electric connection between the E-phase plug pin and the ground wire end of the electric water heater by the first single chip microcomputer according to the third level instruction.
4. The intelligent protection electric water heater of claim 3, wherein the power plug further comprises a reset module, the first single chip is connected with the reset module, and the first single chip is further configured to: the control reset module restores the electric connection between the L-phase bolt and the live wire end of the electric water heater after being disconnected, the control reset module restores the electric connection between the N-phase bolt and the zero wire end of the electric water heater after being disconnected, and the control reset module restores the electric connection between the E-phase bolt and the ground wire end of the electric water heater after being disconnected.
5. The intelligent protection electric water heater according to claim 1, wherein the control module further comprises a relay module, the relay module is respectively connected with the second single chip microcomputer and the electric heating module of the electric water heater, a driving power supply of the relay module is obtained through a direct current power supply line, and a switch side of the relay module is connected in series between the electric heating module and a live wire end and a zero wire end of the electric water heater.
6. The intelligent protection electric water heater according to claim 5, further comprising a voltage conversion module, wherein the voltage conversion module is used for providing adaptive voltage for the relay module or the second single chip microcomputer, and the voltage conversion module is arranged on a control module or a power-taking plug.
7. The intelligent protection electric water heater according to claim 5, further comprising a temperature sensor module, wherein the temperature sensor module is used for sensing a water tank temperature of the electric water heater, and the second single chip microcomputer is used for determining that the water tank temperature exceeds a preset temperature threshold value, and controlling the relay module to cut off power supply of the electric heating module.
8. The intelligent protected electric water heater of claim 1, wherein the control module further comprises: and the operation module is connected with the second singlechip and is used for sending an operation instruction of a user to the second singlechip.
9. The intelligent protected electric water heater of claim 1, wherein the control module further comprises: and the display module is connected with the second singlechip and is used for displaying the information transmitted by the second singlechip.
10. The intelligent protection electric water heater according to claim 5, further comprising a thermal circuit breaker, wherein the thermal circuit breaker is connected in series between the live wire end and the L-phase plug pin of the electric water heater, the thermal circuit breaker is connected in series between the live wire end and the N-phase plug pin of the electric water heater, the thermal circuit breaker is used for sensing the temperature of the electric heating module of the electric water heater, when the temperature of the electric heating module of the electric water heater exceeds the thermal threshold of the thermal circuit breaker, the thermal circuit breaker disconnects the electric connection between the live wire end and the L-phase plug pin of the electric water heater, and the thermal circuit breaker disconnects the electric connection between the live wire end and the N-phase plug pin of the electric water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022902154.3U CN213873231U (en) | 2020-12-04 | 2020-12-04 | Intelligent protection electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022902154.3U CN213873231U (en) | 2020-12-04 | 2020-12-04 | Intelligent protection electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213873231U true CN213873231U (en) | 2021-08-03 |
Family
ID=77042173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022902154.3U Active CN213873231U (en) | 2020-12-04 | 2020-12-04 | Intelligent protection electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213873231U (en) |
-
2020
- 2020-12-04 CN CN202022902154.3U patent/CN213873231U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101084109B1 (en) | Power saving multiconcent for fire prevention | |
| CN201340528Y (en) | Zero-power time-limited standby control circuit of household appliances | |
| CN103346444A (en) | Intelligent socket for Internet of Things | |
| CN114726097B (en) | Low-voltage intelligent circuit breaker device of double-core mode | |
| CN207382046U (en) | A kind of automation switching device of base station electric power system | |
| CN108933427B (en) | Electric water heater and protection device thereof | |
| CN204012090U (en) | A kind of power line and water heater | |
| CN106848759B (en) | A kind of Intelligent socket based on wireless charging | |
| CN213873231U (en) | Intelligent protection electric water heater | |
| CN204088777U (en) | A kind of household electricity monitoring intelligent socket | |
| CN214370991U (en) | Intelligent protection system of electric water heater | |
| CN214231168U (en) | Intelligent closestool device that generates heat in twinkling of an eye | |
| CN215221827U (en) | Dual-power intelligent control circuit and dual-power intelligent transfer switch | |
| CN112531643B (en) | User cold ground wire detection circuit and electrical equipment using same | |
| CN211320508U (en) | Intelligent socket and wireless communication system | |
| CN211953283U (en) | Electric water heater control protection system and electric water heater | |
| CN216903426U (en) | Power line temperature detection protection device and temperature detection control device | |
| CN111987541A (en) | Safety power line | |
| CN210444067U (en) | Remote alarm controller for electric power facilities | |
| CN204179402U (en) | Safety socket and safety socket system | |
| CN209960772U (en) | Electric water heater with water outlet and power off functions | |
| CN113639469A (en) | Electric water heater with intelligent protection automatic complete machine out-of-work function | |
| CN216903425U (en) | Power line temperature detection protection device and temperature detection control device | |
| CN212784085U (en) | Safety power line | |
| CN211731283U (en) | Automobile intelligent distribution box system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |