CN215983279U - Communication circuit of power carrier of electric water heater - Google Patents
Communication circuit of power carrier of electric water heater Download PDFInfo
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- CN215983279U CN215983279U CN202122690202.1U CN202122690202U CN215983279U CN 215983279 U CN215983279 U CN 215983279U CN 202122690202 U CN202122690202 U CN 202122690202U CN 215983279 U CN215983279 U CN 215983279U
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Abstract
The embodiment of the utility model discloses a communication circuit of a power supply carrier of an electric water heater, which comprises a power supply board receiving circuit and a display board sending circuit, wherein the power supply board receiving circuit comprises an interface P1, a triode Q1, a resistor R1, a resistor R2, a resistor R3 and a resistor R4; the display panel sending circuit comprises an interface P2, a MOS tube Q2, a resistor R5, a resistor R6, a resistor R7, a diode D1 and a diode D2, wherein the interface P2 is connected with the interface P1 through a lead. On the basis of communication between the power panel and the display panel, the communication speed is greatly improved by adopting power carrier waves, the feedback speed is also improved, and the error alarm (failure of a sensor of the power panel and the like) can be protected; the utility model directly adopts the power supply line carrier communication, thus saving communication lines; meanwhile, the standardization of the circuit board is facilitated, and the material preparation cost is saved.
Description
Technical Field
The utility model relates to the field of electric water heaters, in particular to a communication circuit of a power supply carrier of an electric water heater.
Background
The existing electric water heater circuit board mainly adopts two schemes, one is that the whole scheme is solved by one board; and secondly, a power supply and load board (power supply board) is adopted, a display and key board (display board) is adopted, and the load of the power supply board is controlled through a display board lead-out bus bar.
The traditional display board and the power board adopt a UART communication mode, and the number of led-out communication lines is large, the cost is high, and the production efficiency is low. The required interface is 5 pin; the connecting lines are 5. The traditional display board and power board interface is shown in fig. 1, and the scheme has the defects of more communication and load control lines, low communication speed and no timely feedback on the failure of a circuit board; the traditional scheme needs more pins of the MCU, wastes resources and has high cost; the compatibility of the power panel is not good enough, and the material preparation cost is high.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the embodiments of the present invention is to provide a communication circuit for power carrier of an electric water heater to improve compatibility and reduce material preparation cost.
In order to solve the above technical problems, an embodiment of the present invention provides a communication circuit of a power carrier of an electric water heater, the electric water heater includes a power board and a display board, the communication circuit is composed of a power board receiving circuit and a display board transmitting circuit, wherein,
the power panel receiving circuit comprises an interface P1, a triode Q1, a resistor R1, a resistor R2, a resistor R3 and a resistor R4, wherein the interface P1 comprises 2 pins, one pin is grounded and is connected with the C pole of the triode Q1 through the resistor R2, and the other pin is respectively connected with the B pole and the E pole of the triode Q1 through the resistor R3 and the resistor R4; the E pole of the triode Q1 is connected with the power supply output end of the power panel, and the C pole of the triode Q1 is connected with the signal end of the power panel through a resistor R1;
the display panel transmitting circuit comprises an interface P2, a MOS tube Q2, a resistor R5, a resistor R6, a resistor R7, a diode D1 and a diode D2, wherein the interface P2 is connected with the interface P1 through a wire, the interface P2 comprises 2 pins, and the two pins are respectively connected with the D pole of the MOS tube Q2 through the resistor R5 and the diode D1 which are connected in series and the resistor R6 and the diode D2 which are connected in series; the G pole of the MOS transistor Q2 is connected with the data output end of the display panel and is grounded through a resistor R7; the S pole of the MOS transistor Q2 is grounded.
Further, the display panel sending circuit further comprises a rectifier bridge BD1 for reverse connection, wherein the rectifier bridge BD1 is connected with the interface P2 and the positive electrode and the negative electrode of the power supply.
Further, the MOS transistor Q2 is an N-channel MOS transistor.
Further, the transistor Q1 is a PNP transistor.
The utility model has the beneficial effects that: on the basis of communication between the power panel and the display panel, the communication speed is greatly improved by adopting power carrier waves, the feedback speed is also improved, and the error alarm (failure of a sensor of the power panel and the like) can be protected; the utility model directly adopts the power supply line carrier communication, thus saving communication lines; meanwhile, the standardization of the circuit board is facilitated, each rice cooker of the power panel is basically fixed, and different rice cooker operation interfaces with different schemes are provided. For the novel scheme, only different display panels need to be designed, so that the development cost is saved; and for a rice cooker board factory, the power panel is convenient to prepare, all machine types are suitable, and most of preparation cost can be completely saved.
Drawings
Fig. 1 is a circuit diagram of a prior art display panel and power panel interface.
Fig. 2 is a circuit diagram of a communication circuit of a power carrier of an electric water heater according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and the present invention is further described in detail with reference to the drawings and specific embodiments.
Referring to fig. 2, a communication circuit of a power carrier of an electric water heater according to an embodiment of the present invention includes a power board receiving circuit and a display board transmitting circuit.
The electric water heater comprises a power panel and a display panel.
The power panel receiving circuit comprises an interface P1, a triode Q1, a resistor R1, a resistor R2, a resistor R3 and a resistor R4, wherein the interface P1 comprises 2 pins, one pin is grounded and is connected with the C pole of the triode Q1 through the resistor R2, and the other pin is respectively connected with the B pole and the E pole of the triode Q1 through the resistor R3 and the resistor R4; the E pole of the triode Q1 is connected with the power supply output end of the power panel, and the C pole of the triode Q1 is connected with the signal end of the power panel through the resistor R1. The interface P1 outputs 5V and GND, the carrier wave of the power supply 5V directly transmits the level change to one end of the R1 through a loop of Q1, R1, R2, R3 and R4, and the power panel processes the corresponding level change through the singlechip and analyzes the level change into corresponding data, thereby processing the corresponding data frame.
The display panel transmitting circuit comprises an interface P2, a MOS tube Q2, a resistor R5, a resistor R6, a resistor R7, a diode D1 and a diode D2, wherein the interface P2 is connected with the interface P1 through a wire, the interface P2 comprises 2 pins, and the two pins are respectively connected with the D pole of the MOS tube Q2 through the resistor R5 and the diode D1 which are connected in series and the resistor R6 and the diode D2 which are connected in series; the G pole of the MOS transistor Q2 is connected with the data output end of the display panel and is grounded through a resistor R7; the S pole of the MOS transistor Q2 is grounded. R5 and D1 are based on the same principle as R6 and D2, and the diodes are used for protecting the circuit, and the MCU simulates the transmission waveform and transmits the data waveform to 5V through Q2.
In one embodiment, the display panel transmitting circuit further includes a rectifier bridge BD1 for reverse connection, and the rectifier bridge BD1 connects the interface P2 and the positive and negative power supplies. In order to prevent the 5V from being reversely connected with the GND, the utility model adds the BD1 for rectification, thereby ensuring no influence on the output polarity of the power panel, avoiding burning the display panel and working as long as the power panel is connected with a wire.
In one embodiment, the MOS transistor Q2 is an N-channel MOS transistor, which may be model 2300.
In one embodiment, transistor Q1 is a PNP transistor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A communication circuit of power carrier of electric water heater, the said electric water heater includes power panel and display panel, characterized by that, the said communication circuit is made up of power panel receiving circuit and display panel sending circuit, wherein,
the power panel receiving circuit comprises an interface P1, a triode Q1, a resistor R1, a resistor R2, a resistor R3 and a resistor R4, wherein the interface P1 comprises 2 pins, one pin is grounded and is connected with the C pole of the triode Q1 through the resistor R2, and the other pin is respectively connected with the B pole and the E pole of the triode Q1 through the resistor R3 and the resistor R4; the E pole of the triode Q1 is connected with the power supply output end of the power panel, and the C pole of the triode Q1 is connected with the signal end of the power panel through a resistor R1;
the display panel transmitting circuit comprises an interface P2, a MOS tube Q2, a resistor R5, a resistor R6, a resistor R7, a diode D1 and a diode D2, wherein the interface P2 is connected with the interface P1 through a wire, the interface P2 comprises 2 pins, and the two pins are respectively connected with the D pole of the MOS tube Q2 through the resistor R5 and the diode D1 which are connected in series and the resistor R6 and the diode D2 which are connected in series; the G pole of the MOS transistor Q2 is connected with the data output end of the display panel and is grounded through a resistor R7; the S pole of the MOS transistor Q2 is grounded.
2. The communication circuit of the power supply carrier of the electric water heater as claimed in claim 1, wherein the display board transmitting circuit further comprises a rectifier bridge BD1 for reverse connection, the rectifier bridge BD1 connects the interface P2 and the positive and negative power supply electrodes.
3. The communication circuit of the power carrier of the electric water heater as claimed in claim 1, wherein the MOS transistor Q2 is an N-channel MOS transistor.
4. The electrical water heater power carrier communication circuit as claimed in claim 1, wherein the transistor Q1 is a PNP transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690202.1U CN215983279U (en) | 2021-11-04 | 2021-11-04 | Communication circuit of power carrier of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690202.1U CN215983279U (en) | 2021-11-04 | 2021-11-04 | Communication circuit of power carrier of electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215983279U true CN215983279U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122690202.1U Active CN215983279U (en) | 2021-11-04 | 2021-11-04 | Communication circuit of power carrier of electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215983279U (en) |
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2021
- 2021-11-04 CN CN202122690202.1U patent/CN215983279U/en active Active
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