CN216647139U - Power supply communication circuit of cooking utensil and cooking utensil - Google Patents
Power supply communication circuit of cooking utensil and cooking utensil Download PDFInfo
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- CN216647139U CN216647139U CN202123157584.8U CN202123157584U CN216647139U CN 216647139 U CN216647139 U CN 216647139U CN 202123157584 U CN202123157584 U CN 202123157584U CN 216647139 U CN216647139 U CN 216647139U
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Abstract
The utility model discloses a power supply communication circuit of a cooking appliance and the cooking appliance, wherein the power supply communication circuit comprises: the system comprises a first host and a second host which are connected through a plug-in coupler, wherein the plug-in coupler comprises a bus and a ground wire; the first host comprises a first power supply circuit, is connected with a power supply and is provided with a first output end and a second output end, the first output end supplies power to the first host, and the second output end is connected with the bus; the second host comprises a second power supply circuit, the input end of the second power supply circuit is connected with the bus, and the output end of the second power supply circuit supplies power to the second host; the first host further comprises a first bus voltage adjusting unit and a first communication signal receiving unit, and the second host further comprises a second bus voltage adjusting unit and a second communication signal receiving unit; and an energy storage circuit is arranged between the input end of the second power supply circuit and the ground and is used for maintaining the stability of the input voltage of the input end of the second power supply circuit when the bus voltage changes.
Description
Technical Field
The utility model relates to the field of household appliances, in particular to a power supply communication circuit of a cooking appliance and the cooking appliance.
Background
At present, many household electrical appliances have two or more split hosts, for example, many household electrical appliances are provided with a display panel and a power panel, which are respectively provided with a separate main control chip, so that a communication and power supply relationship exists between the two. Currently, the product display panel commonly used at present mainly communicates with the main control panel in a 4-wire mode (one power line, two data lines and one ground wire) or a 3-wire mode (one power line, one data line and one ground wire). In some scenes, connecting lines between the discrete hosts are as few as possible, so that the complexity of a connecting structure between the hosts is reduced, and the cost is saved.
Therefore, how to simply implement communication and power supply between two discrete hosts becomes a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The technical problem of how to easily realize communication and power supply between two discrete hosts is solved. The utility model provides a power supply communication circuit of a cooking appliance and the cooking appliance.
According to a first aspect, an embodiment of the present application provides a power supply communication circuit of a cooking appliance, including: the system comprises a first host and a second host which are connected through a plug-in coupler, wherein the plug-in coupler comprises a bus and a ground wire; the first host comprises a first power supply circuit, is connected with a power supply and is provided with a first output end and a second output end, the first output end supplies power to the first host, and the second output end is connected with the bus; the second host comprises a second power supply circuit, the input end of the second power supply circuit is connected with the bus, and the output end of the second power supply circuit supplies power to the second host; the first host further comprises a first bus voltage adjusting unit and a first communication signal receiving unit, wherein the first bus voltage adjusting unit is arranged between the bus and the ground; the first communication signal receiving unit is connected with a bus; the second host further comprises a second bus voltage adjusting unit and a second communication signal receiving unit, wherein the second bus voltage adjusting unit is arranged between the bus and the ground; the second communication signal receiving unit is connected with a bus; and an energy storage circuit is arranged between the input end of the second power supply circuit and the ground and is used for maintaining the stability of the input voltage of the input end of the second power supply circuit when the bus voltage changes.
Optionally, a diode is disposed between the tank circuit and the bus; the anode of the diode is connected with the bus, and the cathode of the diode is connected with the energy storage circuit.
Optionally, the first bus voltage adjusting unit includes: one end of the first controllable switch is connected with the bus, the other end of the first controllable switch is connected with the ground wire, and the control end of the first controllable switch is connected with the communication signal generation end of the first host; the second bus voltage adjusting unit includes: one end of the second controllable switch is connected with the bus, the other end of the second controllable switch is connected with the ground wire, a control end of the second controllable switch is connected with a communication signal generation end of a second host, the communication signal generation end can output a communication signal, and the communication signal can control the first controllable switch or the second controllable switch to be switched on or switched off.
Optionally, a first resistor is disposed between the second output terminal and the bus; a second resistor is arranged between the first controllable switch and the bus, and a third resistor is arranged between the second controllable switch and the bus, wherein when the first controllable switch or the second controllable switch is turned on, the bus voltage is less than a preset voltage.
Optionally, the first controllable switch and the second controllable switch include any one of a triode, a MOS transistor, and an IGBT.
Optionally, the period of the communication signal is less than 100ms, and the duty cycle is less than 50%.
Optionally, the tank circuit comprises at least one capacitor or at least one inductor.
Optionally, the capacitance value of the capacitor is greater than 100 uf.
Optionally, the first power supply circuit comprises a low dropout voltage regulator circuit.
According to a second aspect, embodiments of the present application provide a cooking appliance, comprising: the device comprises a first assembly and a second assembly which are detachable, wherein the first assembly and the second assembly are connected through a plug-in coupler, and the plug-in coupler comprises a bus and a ground wire; the first assembly is provided with the first host, the second assembly is provided with the second host, and the first host and the second host are electrically connected through a bus and a ground wire in the plug-in coupler; the power supply communication circuit of the cooking appliance according to any one of the first aspect.
The first host is connected with a power supply through a first power supply circuit to supply power to the first host, meanwhile, the other output of the first power supply circuit is connected with a bus to supply power to the bus, the input end of the power supply circuit of the second host is connected with the bus to supply power to the second host, so that the second host is supplied with power through the bus, when communication is carried out, a first bus voltage adjusting unit in the first host indicates that the first host sends a communication signal to the second host through adjusting the bus voltage, and a second communication signal receiving unit decodes the bus voltage when receiving the change of the bus voltage, so that the communication signal sent by the first host is received; a second bus voltage adjusting unit in a second host represents that the second host sends communication signals to a first host by adjusting bus voltage, and a first communication signal receiving unit decodes the bus voltage when receiving the change of the bus voltage so as to receive the communication signals sent by the first host. When first host computer and second host computer intercommunicate, through adjusting bus voltage for bus voltage is in the change state, consequently, in order to guarantee that the second host computer can normally supply power, is provided with tank circuit between second power supply circuit's input and ground for the stability of stabilizing bus voltage change, the stability of the input voltage of maintaining second power supply circuit input guarantees that the second host computer can normally supply power, does not cut off the power supply.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic block diagram of a power supply communication circuit of a cooking appliance provided by the present invention;
fig. 2 is a schematic block diagram of a power supply communication circuit of another cooking appliance provided by the present invention;
fig. 3 is a schematic circuit diagram of a power supply communication circuit of another cooking appliance provided by the present invention;
fig. 4 is a waveform diagram of a part of test points in the power supply communication circuit provided by the utility model.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
The power supply communication circuit of the cooking appliance comprises a first assembly and a second assembly which are detachable, wherein the first assembly and the second assembly are connected through a plug-in coupler, and the plug-in coupler comprises a bus and a ground wire; the first assembly is provided with the first host, the second assembly is provided with the second host, and the first host and the second host are electrically connected through a bus and a ground wire in the plug-in coupler; as an exemplary embodiment, the first component is a pot body and the second component is a pot cover, wherein the pot cover and the pot body are electrically connected by a plug-in coupler 10, and the plug-in coupler 10 includes a BUS and a ground wire. As shown in fig. 1, the power supply communication circuit may include:
a first main unit 20 arranged in the pot body and a second main unit 30 arranged in the pot cover, wherein the first main unit 20 and the second main unit 30 are connected with the ground wire through the BUS BUS; the first host 20 comprises a first power supply circuit 21 connected with a power supply and provided with a first output end and a second output end, wherein the first output end supplies power to the first host 20, and the second output end is connected with the BUS; the second host 30 includes a second power supply circuit 31, an input end of which is connected to the BUS, and an output end of which supplies power to the second host 30; the first host 20 further includes a first BUS voltage adjusting unit 22 and a first communication signal receiving unit 23, the first BUS voltage adjusting unit 22 being disposed between the BUS and ground; the first communication signal receiving unit 23 is connected with a BUS; the second host 30 further includes a second BUS voltage adjusting unit 22 and a second communication signal receiving unit 33, the second BUS voltage adjusting unit 22 being disposed between the BUS and ground; the second communication signal receiving unit 33 is connected to the BUS; a tank circuit 34 is provided between the input terminal of the second power supply circuit 31 and the ground, and is configured to maintain the input voltage at the input terminal of the second power supply circuit 31 stable when the bus voltage changes.
In this embodiment, the first host 20 is connected to a power supply through the first power circuit 21 to supply power to the first host 20, and meanwhile, the other output of the first power circuit 21 is connected to the BUS to supply power to the BUS, the input terminal of the power circuit of the second host 30 is connected to the BUS to supply power to the second host 30, so as to supply power to the second host 30 through the BUS, during communication, the first BUS voltage adjusting unit 22 in the first host 20 adjusts the BUS voltage to represent that the first host 20 sends a communication signal to the second host 30, and the second communication signal receiving unit 33 decodes the change of the BUS voltage when receiving the change of the BUS voltage, and further receives the communication signal sent by the first host 20; the second bus voltage adjusting unit 22 in the second host 30 indicates that the second host 30 sends the communication signal to the first host 20 by adjusting the bus voltage, and the first communication signal receiving unit 23 decodes the bus voltage change when receiving the bus voltage change, and then receives the communication signal sent by the first host 20. When the first host 20 and the second host 30 communicate with each other, the bus voltage is in a changing state by adjusting the bus voltage, and therefore, in order to ensure that the second host 30 can normally supply power, the energy storage circuit 34 is arranged between the input end of the second power circuit 31 and the ground, and is used for stabilizing the change of the bus voltage, maintaining the stability of the input voltage at the input end of the second power circuit 31, and ensuring that the second host 30 can normally supply power without power failure.
As an exemplary embodiment, the first power circuit 21 may be an ACDC circuit, which converts the ac power into the points available to the first host 20 and the second host 30, and may convert the ac power into 12V, wherein one 12V is converted into 5V through DCDC for MCU and other 5V systems. The other 12V voltage is connected to the BUS BUS to supply power to the BUS BUS. In this embodiment, the energy storage circuit 34 may include a capacitor, an inductor, a battery, and other energy storage devices. When the first host 20 communicates with the second host 30, the first bus voltage adjusting unit 22 or the second bus voltage adjusting unit 22 sends a signal by adjusting the bus voltage, in this embodiment, the bus voltage can be reduced, and when the bus voltage is reduced, the energy storage circuit 34 discharges to provide the input voltage for the second power circuit 31. When the communication signal transmission is stopped, the first bus voltage adjusting unit 22 or the second bus voltage adjusting unit 22 is disabled, the bus voltage is restored, and the energy storage circuit 34 is charged. In this embodiment, the charging time period of the energy storage circuit 34 needs to be longer than the discharging time period, so as to ensure that the energy storage circuit 34 can continuously supply power to the second power circuit 31.
As an exemplary embodiment, referring to fig. 2, a diode D1 is provided between the tank circuit 34 and the BUS; the anode of the diode D1 is connected to the BUS, and the cathode of the diode D1 is connected to the tank circuit 34. A diode D1 is provided between the tank circuit 34 and the BUS BUS to prevent the tank circuit 34 from discharging to the BUS BUS and the resistor connected to the BUS BUS, the first signal receiving unit and the second signal receiving unit when discharging.
As an exemplary embodiment, the first host 20 and the second host 30 may have a communication signal generating terminal, the communication signal generating terminal may output a signal for characterizing communication, and the signal output by the communication signal generating terminal may control the first bus voltage adjusting unit 22 or the second bus voltage adjusting unit 22 to adjust the bus voltage to characterize the first host 20 or the second host 30 outputting the communication signal. Referring to fig. 2, the first bus voltage adjusting unit 22 includes: a first controllable switch Q1, one end of the first controllable switch Q1 is connected to the BUS, the other end is connected to the ground, and a control end of the first controllable switch Q1 is connected to the communication signal generation end of the first host 20; the second bus voltage adjusting unit 22 includes: a second controllable switch Q2, one end of the second controllable switch Q2 is connected to the BUS, the other end is connected to the ground, a control end of the second controllable switch Q2 is connected to a communication signal generating end of the second host 30, the communication signal generating end can output a communication signal, and the communication signal can control the first controllable switch Q1 or the second controllable switch Q2 to be turned on or off. When the first host 20 outputs the communication signal to the second host 30, the communication signal generating terminal of the first host 20 outputs the communication signal to the control terminal of the first controllable switch Q1 corresponding to the first host 20, the first controllable switch Q1 is turned on, the bus voltage is pulled down, and when the communication signal receiving unit corresponding to the second host 30 detects the change of the bus voltage, the communication signal output by the first host 20 is received, and the communication is completed. When the second host 30 outputs the communication signal to the first host 20, the communication signal generating end of the first host 20 outputs the communication signal to the control end of the first controllable switch Q1 corresponding to the second host 30, the first controllable switch Q1 is turned on, the bus voltage is pulled down, and when the communication signal receiving unit corresponding to the first host 20 detects the change of the bus voltage, the communication signal output by the second host 30 is received, so that the communication is completed.
As an exemplary embodiment, referring to fig. 3, a first resistor R1 is provided between the second output terminal and the bus; a second resistor R2 is provided between the first controllable switch Q1 and the bus, and a third resistor R3 is provided between the second controllable switch Q2 and the bus, wherein when the first controllable switch Q1 or the second controllable switch Q2 is turned on, the bus voltage is less than a preset voltage. The first resistor R1 and the second resistor R2 form a voltage divider circuit, when the first controllable switch Q1 and the second controllable switch Q2 are turned off, the bus voltage is the voltage of the second output terminal of the first power supply circuit, and when the first controllable switch Q1 is turned on, the bus is used as the first power supply circuitThe voltage division point of the resistor R1 and the second resistor R2 has a bus voltage of
When the second controllable switch Q2 is turned on, the bus serves as the voltage dividing point of the first resistor R1 and the third resistor R3, and the bus voltage is
When the difference between the resistance values of the second resistor R2 and the third resistor R3 and the first resistor R1 is large, and the first controllable switch Q1 or the second controllable switch Q2 is turned on, the bus voltage is close to 0, so that when the first controllable switch Q1 and the second controllable switch Q2 are turned off, the first communication signal receiving unit and the second communication signal receiving unit receive a high level, and when the first controllable switch Q1 is turned on, the second communication signal receiving unit receives a low level; when the second controllable switch Q2 is turned on, the first communication signal receiving unit receives a low level.
Illustratively, when communication starts, the first host 20 transmits a communication signal, the communication signal generating terminal outputs a high level, the first controllable switch Q1 is turned on, the second host 30 changes the second communication signal receiving unit from the high level to the low level, and the second host 30 analyzes the communication signal transmitted by the first host 20 by determining the time length of the low level. Similarly, when the second host 30 starts to send a signal, the communication signal generating terminal outputs a high level, the second controllable switch Q2 is turned on, the first communication signal receiving unit of the first host 20 changes from the high level to the low level, and the first host 20 analyzes the communication signal sent by the second host 30 by determining the time length of the low level.
Referring to the schematic circuit diagram shown in fig. 3 and the waveform diagram shown in fig. 4, the principle that the first host 20 supplies power to the second host 30 through the bus is described, and the second power circuit is a low dropout regulator (e.g., LDO circuit) taking the electricity storage circuit as an electrolytic capacitor as an example:
when the first host 20 transmits a communication signal, the communication signal generation terminal outputs a high level (the TPB point is a high level as shown in fig. 3 and 4), the first controllable switch Q1 is turned on, and a current flows through the second output terminal of the first power supply circuit 21, the first resistor R1, the second resistor R2, and the first controllable switch Q1 to the ground, at this time, the electrolytic capacitor EC1 in the second host 30 starts to discharge, and the voltage at the input terminal of the second power supply circuit 31 gradually drops (the TPC point waveform as shown in fig. 3 and 4). Before the voltage at the input terminal of the second power circuit 31 drops to 8V (the lowest input voltage of the LDO circuit), the bus voltage must be restored, the first controllable switch Q1 is controlled to be turned off, that is, the control signal generation terminal outputs a low level (the TPB and TPE point is a low level), after the first controllable switch Q1 is turned off, the bus voltage is restored to the voltage at the second output terminal of the first power circuit, so that the electrolytic capacitor EC1 is charged (as shown in the TPC point waveform rising phase shown in fig. 3 and 4), otherwise the second power circuit of the second host 30 is powered off. Since the charging time is longer than the discharging time, the charging time of the electrolytic capacitor EC1 must be performed after each high level is output from the communication signal generating terminal of the first host 20 (such as the TPB waveform shown in fig. 3 and 4), and the time length is longer than the high level time, so that the period of the communication signal is required to be less than 100ms, and the duty ratio is required to be less than 50%.
Similarly, when the second host 30 sends a communication signal, the communication signal generating terminal outputs a high level (e.g., the TPE point shown in fig. 3 and 4 is high), the first controllable switch Q1 is turned on, and a current flows through the second output terminal of the first power circuit, the first resistor R1, the bus, the third resistor R3, and the second controllable switch Q2 to ground, at this time, the electrolytic capacitor EC1 in the second host 30 starts to discharge, and the voltage at the input terminal of the second power circuit slowly drops (e.g., the TPC point waveform shown in fig. 3 and 4). Before the voltage at the input terminal of the second power circuit drops to 8V (the lowest input voltage of the LDO circuit), the bus voltage must be restored, the second controllable switch Q2 is controlled to turn off, that is, the control signal generation terminal outputs a low level (the TPB and TPE point low level shown in fig. 3 and 4), after the second controllable switch Q2 turns off, the bus voltage is restored to the voltage at the second output terminal of the first power circuit, so that the electrolytic capacitor EC1 is charged (the TPC point waveform rising phase shown in fig. 3 and 4), otherwise the second power circuit of the second host 30 will be powered off. Since the charging time is longer than the discharging time, the charging time of the electrolytic capacitor EC1 must be performed after each high level is output from the communication signal generating terminal of the second host 30 (such as the TPE point waveforms shown in fig. 3 and 4), and the time length is longer than the high level time, so that the period of the communication signal is required to be less than 100ms, and the duty ratio is required to be less than 50%. Optionally, in order to reduce the high-low level timing requirement for the communication signal, the second host 30 is maintained to be powered, and the capacitance value of the electrolytic capacitor EC1 is greater than 100 uf.
The application also provides a cooking utensil, it includes first subassembly and the second subassembly of detachable, and wherein the first subassembly can be the pot body, and the second subassembly can be the pot cover, and wherein, first subassembly and second subassembly pass through the plug-in coupling ware electricity and connect, the plug-in coupling ware includes bus and ground wire to and communication circuit in the above-mentioned embodiment, wherein, first host computer sets up in the pot cover, the second host computer sets up in the pot body. The first host and the second host can be powered simultaneously while bidirectional communication is realized by using the bus.
So far, the technical solutions of the present disclosure have been described in connection with the foregoing embodiments, but it is easily understood by those skilled in the art that the scope of the present disclosure is not limited to only these specific embodiments. The technical solutions in the above embodiments can be split and combined, and equivalent changes or substitutions can be made on related technical features by those skilled in the art without departing from the technical principles of the present disclosure, and any changes, equivalents, improvements, and the like made within the technical concept and/or technical principles of the present disclosure will fall within the protection scope of the present disclosure.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the system embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A power supply communication circuit of a cooking appliance, comprising:
the system comprises a first host and a second host which are connected through a plug-in coupler, wherein the plug-in coupler comprises a bus and a ground wire;
the first host comprises a first power supply circuit, is connected with a power supply and is provided with a first output end and a second output end, the first output end supplies power to the first host, and the second output end is connected with the bus;
the second host comprises a second power supply circuit, the input end of the second power supply circuit is connected with the bus, and the output end of the second power supply circuit supplies power to the second host;
the first host further comprises a first bus voltage adjusting unit and a first communication signal receiving unit, wherein the first bus voltage adjusting unit is arranged between the bus and the ground; the first communication signal receiving unit is connected with a bus;
the second host further comprises a second bus voltage adjusting unit and a second communication signal receiving unit, wherein the second bus voltage adjusting unit is arranged between the bus and the ground; the second communication signal receiving unit is connected with a bus;
and an energy storage circuit is arranged between the input end of the second power supply circuit and the ground and is used for maintaining the stability of the input voltage of the input end of the second power supply circuit when the bus voltage changes.
2. The power supply communication circuit of the cooking appliance according to claim 1, wherein a diode is provided between the energy storage circuit and the bus;
the anode of the diode is connected with the bus, and the cathode of the diode is connected with the energy storage circuit.
3. The power supply communication circuit of a cooking appliance according to claim 1,
the first bus voltage adjusting unit includes: one end of the first controllable switch is connected with the bus, the other end of the first controllable switch is connected with the ground wire, and the control end of the first controllable switch is connected with the communication signal generation end of the first host;
the second bus voltage adjusting unit includes: one end of the second controllable switch is connected with the bus, the other end of the second controllable switch is connected with the ground wire, a control end of the second controllable switch is connected with a communication signal generation end of a second host, the communication signal generation end can output a communication signal, and the communication signal can control the first controllable switch or the second controllable switch to be switched on or switched off.
4. The power supply communication circuit of a cooking appliance according to claim 3,
a first resistor is arranged between the second output end and the bus;
a second resistor is arranged between the first controllable switch and the bus, and a third resistor is arranged between the second controllable switch and the bus, wherein when the first controllable switch or the second controllable switch is turned on, the bus voltage is less than a preset voltage.
5. The power supply communication circuit of the cooking appliance according to claim 3, wherein the first controllable switch and the second controllable switch comprise any one of a triode, a MOS (metal oxide semiconductor) transistor and an IGBT.
6. The power supply communication circuit of the cooking appliance according to any one of claims 3 to 5, wherein the period of the communication signal is less than 100ms and the duty cycle is less than 50%.
7. The power supply communication circuit of the cooking appliance of claim 1, wherein the energy storage circuit comprises at least one capacitor or at least one inductor.
8. The power supply communication circuit of the cooking appliance according to claim 7, wherein the capacitance value of the capacitor is greater than 100 uf.
9. The power communication circuit of a cooking appliance according to claim 1, wherein said first power circuit comprises a low dropout regulation circuit.
10. A cooking appliance, comprising:
the device comprises a first assembly and a second assembly which are detachable, wherein the first assembly and the second assembly are connected through a plug-in coupler, and the plug-in coupler comprises a bus and a ground wire;
the first assembly is provided with the first host, the second assembly is provided with the second host, and the first host and the second host are electrically connected through a bus and a ground wire in the plug-in coupler;
the power supply communication circuit of the cooking appliance according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157584.8U CN216647139U (en) | 2021-12-13 | 2021-12-13 | Power supply communication circuit of cooking utensil and cooking utensil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157584.8U CN216647139U (en) | 2021-12-13 | 2021-12-13 | Power supply communication circuit of cooking utensil and cooking utensil |
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| CN216647139U true CN216647139U (en) | 2022-05-31 |
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| CN202123157584.8U Active CN216647139U (en) | 2021-12-13 | 2021-12-13 | Power supply communication circuit of cooking utensil and cooking utensil |
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