CN215490309U - Intelligent plug and electric water heater - Google Patents
Intelligent plug and electric water heater Download PDFInfo
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- CN215490309U CN215490309U CN202121460411.0U CN202121460411U CN215490309U CN 215490309 U CN215490309 U CN 215490309U CN 202121460411 U CN202121460411 U CN 202121460411U CN 215490309 U CN215490309 U CN 215490309U
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Abstract
The utility model provides an intelligent plug and an electric water heater, wherein the intelligent plug comprises a rectification voltage reduction circuit, a current transformer, a control chip, a first relay and a second relay; the input end of the rectification voltage reduction circuit is respectively and electrically connected with a zero line and a live line of the commercial power; the rectification voltage reduction circuit is electrically connected with the control chip, the first relay and the second relay respectively; the current transformer is electrically connected with a control chip, and the control chip is respectively electrically connected with the first relay and the second relay so as to control the conduction or the blockage of the contacts of the first relay and the second relay; the first relay is electrically connected with a zero line and is used for being electrically connected with equipment to be connected; the second relay is electrically connected with a live wire and is used for being electrically connected with equipment to be connected; and the control chip controls the conduction or the blockage of the contact of the first relay and/or the second relay according to the detected signal.
Description
Technical Field
The utility model relates to the technical field of plugs, in particular to an intelligent plug and an electric water heater.
Background
At present, the computer model of the electric water heater adopts a control mode of a leakage protection plug, a power panel and a display panel, as shown in figure 1; the power panel functions as follows: 1. providing a low voltage power to the display panel; 2. the power panel relay is controlled to be closed through the display panel, so that the electric heating tube is controlled not to be heated. However, this control method has the following disadvantages:
as shown in fig. 2, the conventional leakage protection plug is energized by using a contact piece method, and there are risks of poor contact of the contact piece, non-energization due to aging caused by heat generation of the metal end during long-term operation, sparking and the like. For example, the Chinese patent authorization publication number: CN202888530U, date of authorized announcement: 2013.04.17, discloses a protection plug of an electric water heater, which comprises an electric leakage protection module, an electric control CPU and a relay in sequence, wherein the electric leakage protection module is also connected with the relay through a high-voltage output end, the electric control CPU is also connected with an electric leakage button, the other end of the relay is connected with a power plug, and the other end of the electric leakage protection module is connected with a power output end; this plug for electric water heating device passes through the design of plug and earth leakage protection integration, makes earth leakage protection device and electric water heating device separation, avoids influence earth leakage protection device work such as steam in the electric water heating device, and when the electric water heating device electric leakage situation appeared, automatically controlled CPU and earth leakage protection module can carry out the outage operation, and is safer during the use, also makes the user use more convenient simultaneously, need not to install earth leakage protection device in addition again.
Secondly, the common leakage protector has no control mode, so that automatic power-on after power-off can not be really realized.
Placing a power panel in the maintenance cover, wherein the internal wiring is not standard, so that EMC (which refers to the comprehensive evaluation of the interference magnitude (EMI) and the anti-interference capability (EMS) of the electronic product in the aspect of electromagnetic field) test is abnormal;
and fourthly, the inner container and the heating pipe are not sealed easily, water leaks and water is sprayed, and the power panel is short-circuited.
SUMMERY OF THE UTILITY MODEL
The utility model provides an intelligent plug and an electric water heater, aiming at overcoming the problem that the leakage protection plug in the prior art is not provided with a control function, so that automatic power-on cannot be realized after power failure, and the control chip can control the relay to be powered on to work under the condition of eliminating the leakage without manual power-on.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
an intelligent plug comprises a rectification step-down circuit, a current transformer, a control chip, a first relay and a second relay;
the input end of the rectification voltage reduction circuit is respectively and electrically connected with a zero line and a live line of commercial power; the output end of the rectification voltage reduction circuit is electrically connected with a power supply end of the control chip, a coil pin of the first relay and a coil pin of the second relay respectively;
the current transformer is electrically connected with the input end of a control chip, and the output end of the control chip is respectively electrically connected with the other coil pin of the first relay and the other coil pin of the second relay so as to control the conduction or the blockage of the contacts of the first relay and the second relay;
one normally open contact of the first relay is electrically connected with a zero line, and the other normally open contact of the first relay is used for being electrically connected with equipment to be connected;
one normally open contact of the second relay is electrically connected with the live wire, and the other normally open contact of the second relay is used for being electrically connected with equipment to be connected;
the current transformer is used for detecting whether electric leakage exists in circuits among the first relay, the second relay and the equipment to be connected or not and transmitting detected signals to the control chip;
and the control chip controls the conduction or the blockage of the contact of the first relay and/or the second relay according to the detected signal.
Preferably, the rectification step-down circuit comprises a bridge rectification module, a switching power supply module and a voltage stabilizing chip;
the input end of the bridge rectifier module is respectively and electrically connected with a zero line of commercial power;
the output end of the bridge rectifier module is electrically connected with the input end of the switching power supply module;
the output end of the switching power supply module outputs a +12V power supply which is respectively and electrically connected with the power supply end of the voltage stabilizing chip, the power supply end of the first relay and the power supply end of the second relay;
the output end of the voltage stabilizing chip outputs +5V power, and the output end of the voltage stabilizing chip is electrically connected with the power supply end of the control chip.
Preferably, the intelligent plug is further provided with a ground wire connecting terminal, one end of the ground wire connecting terminal is used for connecting a ground wire, and the other end of the ground wire connecting terminal is used for connecting the ground wire of the equipment to be connected.
Preferably, the control chip is further provided with an LED lamp indicating circuit, and when the current transformer detects electric leakage, the control chip controls the LED lamp indicating circuit to work.
Preferably, the control chip is provided with signal ports, and the signal ports comprise a +5V power port, GND and a communication line port.
Furthermore, the voltage stabilizing chip adopts a 7805 model chip.
An electric water heater comprises the intelligent plug, a heating tube and a display panel;
a zero line output connecting terminal of the intelligent plug is electrically connected with the negative electrode of the heating tube;
the live wire output connecting terminal of the intelligent plug is electrically connected with the positive electrode of the heating tube;
the display panel is electrically connected with a signal port of the intelligent plug;
and the ground wire connecting terminal of the intelligent plug is electrically connected with the shell of the heating tube.
Preferably, the electric water heater further comprises a temperature sensor, wherein the temperature sensor collects the temperature of the heating tube and transmits collected temperature information to the display panel for display.
Preferably, the ground wire terminal of the intelligent plug is connected with the heating tube.
Preferably, the display panel is further provided with an intelligent voice module and a WIFI module, and the intelligent voice module is electrically connected with a control chip of the intelligent plug through a signal port; the WIFI module is electrically connected with a control chip of the intelligent plug through a signal port.
Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:
the intelligent plug provided by the utility model has the advantages that the two relays are arranged to respectively control the circuits of the zero line and live wire ends, the occurrence of electric leakage caused by the failure of one relay is avoided, and meanwhile, when the electric leakage is eliminated, the control chip can control the two relays to be electrified to work without manual electrification.
The electric water heater controls the two relays to be electrified to work through the control chip in the intelligent plug, so that the electric heating pipe is controlled to heat, and manual electrification is not needed. Meanwhile, the anti-jamming capability is achieved, and the wire binding is not required to be removed for influencing the EMC of the power panel; the problem of short circuit and wire burning of the power panel caused by poor sealing between the inner container of the electric water heater and the heating pipe can be effectively prevented.
Drawings
Fig. 1 is a circuit connection diagram of an electric water heater in the prior art.
Fig. 2 is a circuit diagram of a prior art leakage protection plug.
Fig. 3 is a circuit diagram of the smart plug described in this embodiment 1.
Fig. 4 is a circuit connection diagram of the electric water heater described in embodiment 2.
In the figure, 1-control chip, 2-first relay, 3-second relay, 4-bridge rectifier module, 5-switching power supply module, 6-voltage stabilizing chip, 7-ground wire terminal, 8-signal port, 9-current transformer, 10-heating tube, 11-display panel, 12-temperature sensor and 13-intelligent plug.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and are used for illustration only, and should not be construed as limiting the patent. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, an intelligent plug includes a rectification step-down circuit, a current transformer, a control chip 1, a first relay 2, and a second relay 3;
the input end of the rectification voltage reduction circuit is respectively and electrically connected with a zero line and a live line of commercial power; (ii) a The output end of the rectification voltage reduction circuit is respectively and electrically connected with the power supply end of the control chip 1, a coil pin of the first relay 2 and a coil pin of the second relay 3;
the current transformer 9 is electrically connected with the input end of the control chip 1, and the output end of the control chip 1 is respectively and electrically connected with the other coil pin of the first relay 2 and the other coil pin of the second relay 3 so as to control the conduction or the blockage of the contacts of the first relay 2 and the second relay 3;
one normally open contact of the first relay 2 is electrically connected with the zero line, and the other normally open contact of the first relay 2 is electrically connected with the negative pole of the equipment to be connected
One normally open contact of the second relay 3 is electrically connected with the live wire, and the other normally open contact of the second relay 3 is electrically connected with the positive electrode of the equipment to be connected
The current transformer 9 is used for detecting whether electric leakage exists in circuits among the first relay 2, the second relay 3 and the equipment to be connected, and transmitting detected signals to the control chip 1;
the control chip 1 controls the conduction or the blockage of the contact circuit of the first relay 2 and/or the second relay 3 according to the detected signal;
the control chip 1 is provided with a signal port 8, and the signal port 8 comprises a +5V power port, GND and a communication line port.
In this embodiment, the current transformer 9 is used to detect whether there is electric leakage in the device to be connected, and if the current transformer 9 detects that there is electric leakage, the current transformer 9 transmits the detected electric leakage signal to the control chip 1, and the control chip 1 controls the corresponding relay to block. If the current transformer 9 detects no electric leakage, the control chip 1 controls the circuits of the first relay 2 and the second relay 3 to be conducted to work, so that automatic electrification is realized, and manual electrification is not needed.
In a specific embodiment, the rectification voltage-reduction circuit comprises a bridge rectification module 4, a switching power supply module 5 and a voltage-stabilizing chip 6;
the input end of the bridge rectifier module 4 is respectively and electrically connected with the zero line and the live line; the bridge rectifier module 4 is used for converting the input 220V alternating current commercial power into direct current.
The output end of the bridge rectifier module 4 is electrically connected with the input end of the switching power supply module 5;
the output end of the switching power supply module 5 outputs a +12V power supply which is respectively and electrically connected with the power supply end of the voltage stabilizing chip 6, the power supply end of the first relay 2 and the power supply end of the second relay 3; the switching power supply module 5 reduces the voltage of the input power supply to +12V, and the power supply is used as the power supply of the first relay 2, the second relay 3 and the voltage stabilizing chip 6.
The output end of the voltage stabilizing chip 6 outputs +5V power, and the output end of the voltage stabilizing chip 6 is electrically connected with the power supply end of the control chip 1. The voltage stabilizing chip 6 adopts a 7805 model chip. The present embodiment adopts a 7805 model chip, and its internal circuit has overvoltage protection, overcurrent protection and overheat protection functions, which makes its performance very stable. An output current of 1A or more can be realized. The device has good temperature coefficient, so the application range of the product is wide. The noise influence can be eliminated by local regulation, the dispersion problem related to single-point regulation is solved, and the precision of the output voltage error is +/-3% and +/-5%. The voltage stabilizing chip is reliable and convenient to use and low in price.
In a specific embodiment, the intelligent plug is further provided with a ground wire connecting terminal 7, one end of the ground wire connecting terminal 7 is used for connecting a ground wire, and the other end of the ground wire connecting terminal 7 is used for connecting the ground wire of the device to be connected. The ground wire terminal 7 is a lead for leading current to the ground, and prevents the current from entering the ground through the ground wire when the equipment to be connected leaks electricity or the voltage is too high. If the metal shell of the equipment to be connected is electrified due to the damage of the insulator and the like, the grounding pin forms grounding short-circuit current to enable the metal shell of the equipment to be connected to be grounded and discharge to the ground, so that people are not shocked, and the safety protection effect is achieved.
In a specific embodiment, the control chip 1 is further provided with an LED lamp indicating circuit, and when the current transformer 9 detects electric leakage, the control chip 1 controls the LED lamp indicating circuit to operate. When the electricity leakage and the electrified abnormality of the ground wire occur, the flicker frequency of the LED lamp on the plug can be displayed, and the maintenance personnel can conveniently judge to carry out fault maintenance.
Example 2
Based on the intelligent plug described in embodiment 1, the present embodiment further provides an electric water heater, as shown in fig. 4, including the intelligent plug 13, the heating tube 10, and the display panel 11;
a zero line output connecting terminal 11 of the intelligent plug 13 is electrically connected with the negative electrode of the heating tube 10;
a live wire output connecting terminal 12 of the intelligent plug 13 is electrically connected with the anode of the heating tube 10;
the display panel 11 is electrically connected with the signal port 8 of the intelligent plug 13;
and the ground wire terminal 7 of the intelligent plug 13 is electrically connected with the shell of the heating tube 10.
The electric water heater of this embodiment further includes a temperature sensor 12, where the temperature sensor 12 collects the temperature of the heating tube 10, and transmits the collected temperature information to the display panel 11 for display.
The working principle of the embodiment is as follows:
1. after the intelligent plug 15 is powered on, the internal control chip 1 and the display panel 11 are reset firstly, the display panel 11 enters standby, the first relay 2 and the second relay 3 are not closed, the mains supply cannot enter the electric water heater through the first relay 2 and the second relay 3, and after the display panel 11 is set to enter a specific mode, the chip of the display panel 11 sends a judgment result of the set mode to the control chip 1 of the intelligent plug 13 through a communication line so as to control the first relay 2 and the second relay 3 to be closed.
2. The display panel 11 can expand other functions, and is also provided with an intelligent voice module and a WIFI module, wherein the intelligent voice module is electrically connected with a control chip of an intelligent plug through a signal port; the WIFI module is electrically connected with a control chip of the intelligent plug through a signal port.
3. When the water heater is in heat preservation or standby, the first relay 2 and the second relay 3 in the intelligent plug 13 are disconnected, and the whole water heater does not have strong electricity.
4. When the water heater has a fault, the display panel 11 displays a fault code, and the first relay 2 and the second relay 3 in the intelligent plug 13 are disconnected.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (10)
1. An intelligent plug, characterized in that: the control circuit comprises a rectification voltage reduction circuit, a current transformer, a control chip, a first relay and a second relay;
the input end of the rectification voltage reduction circuit is respectively and electrically connected with a zero line and a live line of commercial power; the output end of the rectification voltage reduction circuit is electrically connected with a power supply end of the control chip, a coil pin of the first relay and a coil pin of the second relay respectively;
the current transformer is electrically connected with the input end of a control chip, and the output end of the control chip is respectively electrically connected with the other coil pin of the first relay and the other coil pin of the second relay so as to control the conduction or the blockage of the contacts of the first relay and the second relay;
one normally open contact of the first relay is electrically connected with a zero line, and the other normally open contact of the first relay is used for being electrically connected with equipment to be connected;
one normally open contact of the second relay is electrically connected with the live wire, and the other normally open contact of the second relay is used for being electrically connected with equipment to be connected;
the current transformer is used for detecting whether electric leakage exists in circuits among the first relay, the second relay and the equipment to be connected or not and transmitting detected signals to the control chip;
and the control chip controls the conduction or the blockage of the contact of the first relay and/or the second relay according to the detected signal.
2. The smart plug of claim 1, wherein: the rectification voltage reduction circuit comprises a bridge type rectification module, a switching power supply module and a voltage stabilization chip;
the input end of the bridge rectifier module is respectively and electrically connected with a zero line of commercial power;
the output end of the bridge rectifier module is electrically connected with the input end of the switching power supply module;
the output end of the switching power supply module outputs a +12V power supply which is respectively and electrically connected with the power supply end of the voltage stabilizing chip, the power supply end of the first relay and the power supply end of the second relay;
the output end of the voltage stabilizing chip outputs +5V power, and the output end of the voltage stabilizing chip is electrically connected with the power supply end of the control chip.
3. The smart plug of claim 1, wherein: the intelligent plug is further provided with a ground wire connecting terminal, one end of the ground wire connecting terminal is used for being connected with a ground wire, and the other end of the ground wire connecting terminal is used for being connected with the ground wire of the equipment to be connected.
4. The smart plug of claim 1, wherein: the control chip is also provided with an LED lamp indicating circuit, and when the current transformer detects electric leakage, the control chip controls the LED lamp indicating circuit to work.
5. The smart plug of claim 1, wherein: the control chip is provided with a signal port, and the signal port comprises a +5V power port, GND and a communication line port.
6. The smart plug of claim 2, wherein: the voltage stabilizing chip adopts a 7805 model chip.
7. An electric water heater, characterized in that: the intelligent plug, the heating tube and the display panel comprise the intelligent plug, the heating tube and the display panel of any one of claims 1 to 6;
the other normally open contact of the first relay of the intelligent plug is electrically connected with the negative electrode of the heating tube;
the other normally open contact of the second relay of the intelligent plug is electrically connected with the positive electrode of the heating tube;
the display panel is electrically connected with the signal port of the intelligent plug.
8. The electric water heater of claim 7, wherein: the electric water heater also comprises a temperature sensor, wherein the temperature sensor collects the temperature of the heating tube and transmits the collected temperature information to the display panel for display.
9. The electric water heater of claim 7, wherein: and the ground wire connecting terminal of the intelligent plug is connected with the heating tube.
10. The electric water heater of claim 7, wherein: the intelligent voice module is electrically connected with a control chip of the intelligent plug through a signal port; the WIFI module is electrically connected with a control chip of the intelligent plug through a signal port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121460411.0U CN215490309U (en) | 2021-06-28 | 2021-06-28 | Intelligent plug and electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121460411.0U CN215490309U (en) | 2021-06-28 | 2021-06-28 | Intelligent plug and electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215490309U true CN215490309U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121460411.0U Active CN215490309U (en) | 2021-06-28 | 2021-06-28 | Intelligent plug and electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215490309U (en) |
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2021
- 2021-06-28 CN CN202121460411.0U patent/CN215490309U/en active Active
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