CN214905929U - Detection control circuit for coupler short circuit and electric kettle - Google Patents
Detection control circuit for coupler short circuit and electric kettle Download PDFInfo
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- CN214905929U CN214905929U CN202022352164.4U CN202022352164U CN214905929U CN 214905929 U CN214905929 U CN 214905929U CN 202022352164 U CN202022352164 U CN 202022352164U CN 214905929 U CN214905929 U CN 214905929U
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Abstract
The utility model discloses a detection control circuit and electric kettle of coupler short circuit, include: the device comprises an upper coupler, a lower coupler, a main control chip, a switch module and a detection module; the lower coupler comprises a first lower coupling end connected with a live wire of commercial power and a second lower coupling end connected with a zero line of the commercial power; the upper coupler comprises a first upper coupling end coupled with the first lower coupling end and a second upper coupling end coupled with the second lower coupling end; the detection module is used for detecting whether the first lower coupling end and the second lower coupling end are short-circuited or not, or the detection module is used for detecting whether the first upper coupling end and the second upper coupling end are short-circuited or not; the detection module is electrically connected with the main control chip; the switch module is used for controlling the on-off of the commercial power live wire and the input live wire of the first lower coupling end, and the switch module is electrically connected with the main control chip. The technical scheme solves the problem of potential safety hazard caused by short circuit of the electric kettle in the prior art when water is fed in the heating process.
Description
Technical Field
The utility model relates to a technical field of electric hot water especially relates to a detection control circuit and electric kettle of coupler short circuit.
Background
The electric kettle is a necessary product in daily life of people and has a trend of increasing intelligence, and the electric kettle in the related technology comprises a kettle body and a kettle seat, wherein the kettle seat is provided with a lower coupler, the kettle body is provided with an upper coupler, and heating is realized through the connection of the lower coupler and the upper coupler.
The lower coupler of the kettle seat and the upper coupler of the kettle body need to be exposed to realize electric connection, and when water drops to the kettle seat or the kettle body carelessly, the electric kettle is heated to cause a short circuit phenomenon, so that potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a detection control circuit and electric kettle of coupler short circuit to solve among the prior art electric kettle and take place the problem that the short circuit causes the potential safety hazard because of intaking when heating work.
According to the utility model discloses an aspect provides a detection control circuit of coupler short circuit, include: the device comprises an upper coupler, a lower coupler, a main control chip, a switch module and a detection module;
the lower coupler comprises a first lower coupling end connected with a live wire of commercial power and a second lower coupling end connected with a zero line of the commercial power; the upper coupler comprises a first upper coupling end coupled with the first lower coupling end and a second upper coupling end coupled with the second lower coupling end;
the detection module is configured to detect whether the first lower coupling end and the second lower coupling end are short-circuited or whether the first upper coupling end and the second upper coupling end are short-circuited; the detection module is electrically connected with the main control chip;
the switch module is used for controlling the on-off of the mains supply live wire and the input live wire of the first lower coupling end, and the switch module is electrically connected with the main control chip.
As an embodiment of the utility model, the detection module includes first resistance, the one end of first resistance with coupling end is connected under first, the other end of first resistance with coupling end is connected under the second, just main control chip's voltage detection port with first ohmic connection.
As an embodiment of the utility model, the detection module includes first resistance, the one end of first resistance with coupling end is connected on the first, the other end of first resistance with coupling end is connected on the second, just main control chip's voltage detection port with first resistance connection.
As an embodiment of the present invention, the detection module further includes a second resistor connected in series to an input terminal of the first resistor.
As an embodiment of the present invention, the detection control circuit further includes a third resistor, one end of the third resistor is connected to the first upper coupling end, and the other end of the third resistor is connected to the second upper coupling end.
As an embodiment of the utility model, switch module includes relay and triode, the contact both ends of relay connect respectively in the commercial power live wire with the input live wire of first coupling end, the coil both ends of relay connect respectively in the power with the collecting electrode of triode, the base of triode with main control chip's power output port connects, the projecting pole ground connection of triode.
As an embodiment of the utility model, the switch module still includes the fourth resistance, the one end of fourth resistance with the base of triode is connected, the other end of fourth resistance with main control chip's voltage output port is connected.
As an embodiment of the present invention, the switch module further includes a fifth resistor, one end of the fifth resistor is connected to the emitter of the triode, and the other end of the fifth resistor is connected to the base of the triode.
As an embodiment of the present invention, the switch module further includes a diode, the anode of the diode is connected to the collector of the triode, and the cathode of the diode is connected to the power supply.
According to the utility model discloses a second aspect provides an electric kettle, including the kettle seat with assemble the kettle body in order to realize electric heating on the kettle seat, electric kettle still includes the first aspect the detection control circuit of coupler short circuit, down the coupler set up in the kettle seat, go up the coupler set up in the kettle body.
Implement the embodiment of the utility model provides a, will have following beneficial effect at least:
in the utility model, after the lower coupler is communicated with the upper coupler, the commercial power alternating current realizes the power supply; when the detection module is used for detecting whether the lower coupler is short-circuited or not and when the detection signal is that the lower coupler is short-circuited, the main control chip receiving the detection signal controls the switch module to cut off the connection between the input live wire of the first lower coupling end and the commercial power live wire, namely the power supply stops supplying power; similarly, when the detection module is used for detecting whether the upper coupler is short-circuited or not, and when the detection signal is that the upper coupler is short-circuited, the main control chip receiving the detection signal controls the switch module to cut off the connection between the input live wire of the first lower coupling end and the commercial power live wire, namely the power supply stops supplying power; by applying the technical scheme, the problems that the electric kettle is damaged and even potential safety hazards are caused due to the fact that short circuit occurs when water is fed into the electric kettle during heating operation in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural diagram of a detection control circuit for coupler short circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a detection control circuit for coupler short circuit according to another embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a detection control circuit for coupler short circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a detection control circuit for coupler short circuit according to another embodiment of the present invention.
In the figure: 10. a lower coupler; 11. a first lower coupling end; 12. a second lower coupling end; 20. an upper coupler; 21. a first upper coupling end; 22. a second upper coupling end; 30. a switch module; 40. a detection module; 50. and a main control chip.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a detection control circuit for coupler short circuit, which includes an upper coupler 20, a lower coupler 10, a main control chip 50, a switch module 30 and a detection module 40; the lower coupler 10 comprises a first lower coupling end 11 connected with a live wire of a mains supply and a second lower coupling end 12 connected with a zero line of the mains supply; the upper coupler 20 comprises a first upper coupling end 21 coupled with the first lower coupling end 11 and a second upper coupling end 22 coupled with the second lower coupling end 12; the detection module 40 is configured to detect whether the first lower coupling end 11 and the second lower coupling end 12 are short-circuited, or the detection module 40 is configured to detect whether the first upper coupling end 21 and the second upper coupling end 22 are short-circuited; the detection module 40 is electrically connected with the main control chip 50; the switch module 30 is used for controlling on/off of the live wire of the commercial power and the input live wire of the first lower coupling end 11, and the switch module 30 is electrically connected with the main control chip 50.
In the utility model, after the lower coupler 10 and the upper coupler 20 are communicated, the commercial power alternating current realizes the power supply; when the detection module 40 is used for detecting whether the lower coupler 10 is short-circuited or not, and when the detection signal is that the lower coupler 10 is short-circuited, the main control chip 50 receiving the detection signal controls the switch module 30 to cut off the connection between the input live wire of the first lower coupling end 11 and the commercial power live wire, that is, the power supply stops supplying power; similarly, when the detection module 40 detects whether the upper coupler 20 is short-circuited, and when the detection signal indicates that the upper coupler 20 is short-circuited, the main control chip 50 receiving the detection signal controls the switch module 30 to cut off the connection between the input live wire of the first lower coupling end 11 and the live wire of the utility power, that is, the power supply stops supplying power; by applying the technical scheme, the problems that the electric kettle is damaged and even potential safety hazards are caused due to the fact that short circuit occurs when water is fed into the electric kettle during heating operation in the prior art are solved.
It should be noted that, when the detection module 40 detects that the lower coupler 10 is not short-circuited, the main control chip 50 controls the switch module 30 to always connect the live line of the utility power and the input live line of the first lower coupling end 11 to realize heating; similarly, when the detection module 40 detects that the upper coupler 20 is not short-circuited, the main control chip 50 controls the switch module 30 to always connect the live line of the utility power and the input live line of the first lower coupling end 11 to realize heating.
In one embodiment, the detection module 40 includes a first resistor R1, one end of the first resistor R1 is connected to the first bottom coupling terminal 11, the other end of the first resistor R1 is connected to the second bottom coupling terminal 12, and the voltage detection port of the main control chip 50 is connected to the first resistor R1 to detect the voltage of the first resistor R1. Specifically, the main control chip 50 sets a preset voltage V0 of the first resistor R1, and the main control chip 50 detects that the voltage of the first resistor R1 is V1. When the voltage V1 is lower than the preset voltage V0, it indicates that the live wire of the first lower coupling end 11 and the neutral wire of the second lower coupling end 12 are short-circuited, the main control chip 50 controls the switch module 30 to cut off the connection between the live wire of the utility power and the input live wire of the first lower coupling end 11, and the power supply stops supplying power.
In addition, the detection module 40 further includes a second resistor R2 connected in series to an input terminal of the first resistor R1. Therefore, the sum of the voltages at the two ends of the first resistor R1 and the second resistor R2 is the voltage at the two ends of the lower coupler 10, and after the lower coupler 10 and the upper coupler 20 are turned on, the voltage at the two ends of the lower coupler 10 is up to several hundred volts, in this embodiment, the second resistor R2 is arranged to divide the voltage of the first resistor R1, and the voltage at the two ends of the lower coupler 10 is set to be V, so that V1 ═ V × R1/(R1+ R2), that is, the input voltage of the first resistor R1 can be reduced according to the ratio, thereby solving the problem that the port of the main control chip 50 cannot bear an excessively high voltage.
In one embodiment, the detection module 40 includes a first resistor R1, one end of the first resistor R1 is connected to the first upper coupling terminal 21, the other end of the first resistor R1 is connected to the second upper coupling terminal 22, and the voltage detection port of the main control chip 50 is connected to the first resistor R1 to detect the voltage of the first resistor R1. Specifically, the main control chip 50 sets a preset voltage V0 of the first resistor R1, and the main control chip 50 detects that the voltage of the first resistor R1 is V1. When the voltage V1 is lower than the preset voltage V0, it indicates that the live wire of the first upper coupling end 21 and the neutral wire of the second upper coupling end 22 are short-circuited, the main control chip 50 controls the switch module 30 to cut off the connection between the live wire of the utility power and the input live wire of the first lower coupling end 11, and the power supply stops supplying power.
In addition, the detection module 40 further includes a second resistor R2 connected in series to an input terminal of the first resistor R1. Therefore, the sum of the voltages at the two ends of the first resistor R1 and the second resistor R2 is the voltage at the two ends of the upper coupler 20, and after the lower coupler 10 and the upper coupler 20 are turned on, the voltage at the two ends of the upper coupler 20 is up to several hundred volts, in this embodiment, the second resistor R2 is used to divide the voltage of the first resistor R1, and the voltage at the two ends of the upper coupler 20 is set to be V, so that V1 ═ V × R1/(R1+ R2), that is, the input voltage of the first resistor R1 can be reduced according to the ratio, thereby solving the problem that the port of the main control chip 50 cannot bear an excessively high voltage.
In one embodiment, the detection control circuit further includes a third resistor R3, one end of the third resistor R3 is connected to the first upper coupling terminal 21, and the other end of the third resistor R3 is connected to the second upper coupling terminal 22. Specifically, the third resistor R3 may be a heat-generating plate, and when the lower coupler 10 and the upper coupler 20 are connected, power is supplied to the third resistor R3, so that the third resistor R3 generates heat.
In one embodiment, the switch module 30 includes a relay REL1 and a transistor Q1, two ends of a contact of the relay REL1 are respectively connected to a live line of the utility power and an input live line of the first lower coupling terminal 11, two ends of a coil of the relay REL1 are respectively connected to a power supply and a collector of the transistor Q1, a base of the transistor Q1 is connected to a power output port of the main control chip 50, and an emitter of the transistor Q1 is grounded.
Specifically, when the main control chip 50 inputs a high level to the base of the triode Q1, the collector and the emitter of the triode Q1 are conducted, two ends of the coil of the relay REL1 are electrified, two ends of the contact of the relay REL1 are communicated with the live wire of the mains supply and the input live wire of the first lower coupling end 11, the lower coupler 10 is communicated with the upper coupler 20, and the third resistor R3 is heated to work; when the main control chip 50 inputs a low level to the base of the transistor Q1, the transistor Q1 is in a cut-off state, and the collector and the emitter of the transistor Q1 are not conducted, so that the two ends of the coil of the relay REL1 are powered off, the two ends of the contact of the relay REL1 are disconnected, the live wire of the mains supply is not conducted with the input live wire of the first lower coupling end 11, and the third resistor R3 does not work.
In some specific embodiments, the switch module 30 further includes a fourth resistor R4, one end of the fourth resistor R4 is connected to the base of the transistor Q1, and the other end of the fourth resistor R4 is connected to the voltage output port of the main control chip 50. The base of the transistor Q1 is limited by the fourth resistor R4, and the power consumption of the transistor Q1 is reduced.
In some specific embodiments, the switch module 30 further includes a fifth resistor R5, one end of the fifth resistor R5 is connected to the emitter of the transistor Q1, and the other end of the fifth resistor R5 is connected to the base of the transistor Q1, so that the transistor Q1 is reliably cut off by the fifth resistor R5, thereby accurately controlling the pull-in and the release of the relay REL 1.
In some embodiments, the switch module 30 further includes a diode D1, the anode of the diode D1 is connected to the collector of the transistor Q1, and the cathode of the diode D1 is connected to the power supply. When the transistor Q1 is turned off, the current path is lost between the two ends of the coil of the relay REL1, a large reverse voltage is generated between the two ends of the coil, and the transistor Q1 is damaged by the combined action of the reverse voltage and the power supply voltage. Therefore, the diode D1 freewheels in the reverse direction, and the surge is suppressed.
The utility model also provides an electric kettle, this electric kettle includes the kettle seat, the kettle body and the detection control circuit of aforementioned coupler short circuit, detection control circuit's lower coupler 10 sets up in the kettle seat, go up coupler 20 and set up in the kettle body, when the kettle body equipment is on the kettle seat, lower coupler 10 and last coupler 20 intercommunication are in order to realize the electrical heating, the detection control circuit of this coupler short circuit is through detecting whether short circuit of coupler 20 or whether short circuit of coupler 10 down, control the break-make in kettle seat and the heating circuit of kettle body.
In one embodiment, the detection module 40 is used to detect whether the lower coupler 10 on the kettle base is short-circuited, and therefore, the first resistor R1 is connected in parallel with the first lower coupling end 11 and the second lower coupling end 12. When the kettle seat is in an independent power-on state, the voltage V1 of the first resistor R1 is detected through the main control chip 50, when the V1 is lower than the preset voltage V0, the main control chip 50 controls the relay to release, and at the moment, the kettle seat is not electrified; when the kettle seat is conducted with the kettle body, the voltage V1 of the first resistor R1 is detected through the main control chip 50, when the V1 is lower than the preset voltage V0, the main control chip 50 controls the relay to be released, at the moment, the kettle seat is not communicated with the kettle body, and the heating plate of the kettle body stops working. That is, when the kettle base is in the independent power-on state and in the conducting state with the kettle body, the detection control circuit can detect whether the live wire and the zero wire of the lower coupler 10 are short-circuited or not, and then the power-on of the kettle base is controlled.
In one embodiment, the detection module 40 is used to detect whether the upper coupler 20 on the kettle body is short-circuited, so that the first resistor R1 is connected in parallel with the first upper coupling end 21 and the second upper coupling end 22. When the kettle body is communicated with the kettle seat, the voltage V1 of the first resistor R1 is detected through the main control chip 50, when the V1 is lower than the preset voltage V0, the main control chip 50 controls the relay to release, at the moment, the kettle seat is not communicated with the kettle body, and the heating disc of the kettle body stops working. That is, when the kettle body is in a state of being conducted with the kettle base, the detection control circuit can detect whether the live wire and the zero wire of the upper coupler 20 are short-circuited or not so as to control the energization of the kettle base and further control whether the heating plate of the kettle body works or not.
In one embodiment, the electric kettle further comprises an alarm electrically connected with the main control chip 50, and when the main control chip 50 receives a short-circuit signal of the detection module 40 to the upper coupler 20 or the lower coupler 10, the alarm is controlled to send out an alarm signal; the warning device can be a buzzer and/or a warning lamp and the like.
In one embodiment, the main control chip 50 may be disposed on the kettle base, and the main control chip 50 is powered by the power supply; or a battery is arranged on the kettle seat, and the main control chip 50 is powered by the battery.
In one embodiment, the main control chip 50 can be disposed on the kettle body, and the main control chip 50 is powered by the power supply; or a battery is arranged on the kettle body, and the main control chip 50 is powered by the battery.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A detection control circuit for a short circuit of a coupler, comprising: the device comprises an upper coupler, a lower coupler, a main control chip, a switch module and a detection module;
the lower coupler comprises a first lower coupling end connected with a live wire of commercial power and a second lower coupling end connected with a zero line of the commercial power; the upper coupler comprises a first upper coupling end coupled with the first lower coupling end and a second upper coupling end coupled with the second lower coupling end;
the detection module is configured to detect whether the first lower coupling end and the second lower coupling end are short-circuited or whether the first upper coupling end and the second upper coupling end are short-circuited; the detection module is electrically connected with the main control chip;
the switch module is used for controlling the on-off of the mains supply live wire and the input live wire of the first lower coupling end, and the switch module is electrically connected with the main control chip.
2. The short-circuit detection control circuit of coupler of claim 1, wherein the detection module comprises a first resistor, one end of the first resistor is connected to the first lower coupling terminal, the other end of the first resistor is connected to the second lower coupling terminal, and the voltage detection port of the main control chip is connected to the first resistor.
3. The short-circuit detection control circuit of coupler of claim 1, wherein the detection module comprises a first resistor, one end of the first resistor is connected to the first upper coupling end, the other end of the first resistor is connected to the second upper coupling end, and the voltage detection port of the main control chip is connected to the first resistor.
4. The detection control circuit of coupler short circuit according to claim 2 or 3, wherein the detection module further comprises a second resistor connected in series to an input terminal of the first resistor.
5. The short-circuit detection control circuit of coupler according to claim 4, further comprising a third resistor, wherein one end of the third resistor is connected to the first upper coupling terminal, and the other end of the third resistor is connected to the second upper coupling terminal.
6. The circuit for detecting and controlling coupler short circuit according to claim 1, wherein the switch module includes a relay and a transistor, two ends of a contact of the relay are respectively connected to a live wire of a commercial power and an input live wire of the first down-coupling terminal, two ends of a coil of the relay are respectively connected to a power supply and a collector of the transistor, a base of the transistor is connected to the power output port of the main control chip, and an emitter of the transistor is grounded.
7. The detection control circuit for the coupler short circuit according to claim 6, wherein the switch module further comprises a fourth resistor, one end of the fourth resistor is connected to the base of the triode, and the other end of the fourth resistor is connected to the voltage output port of the main control chip.
8. The circuit for detecting and controlling a coupler short circuit according to claim 7, wherein the switch module further comprises a fifth resistor, one end of the fifth resistor is connected to the emitter of the transistor, and the other end of the fifth resistor is connected to the base of the transistor.
9. The short-circuit detection control circuit of claim 8, wherein the switch module further comprises a diode, an anode of the diode is connected to the collector of the transistor, and a cathode of the diode is connected to a power supply.
10. An electric kettle, comprising a kettle base and a kettle body assembled on the kettle base to realize electric heating, characterized in that, the electric kettle further comprises a detection control circuit for short circuit of the coupler according to any one of claims 1-9, the lower coupler is arranged on the kettle base, the upper coupler is arranged on the kettle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022352164.4U CN214905929U (en) | 2020-10-21 | 2020-10-21 | Detection control circuit for coupler short circuit and electric kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022352164.4U CN214905929U (en) | 2020-10-21 | 2020-10-21 | Detection control circuit for coupler short circuit and electric kettle |
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| Publication Number | Publication Date |
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| CN214905929U true CN214905929U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022352164.4U Active CN214905929U (en) | 2020-10-21 | 2020-10-21 | Detection control circuit for coupler short circuit and electric kettle |
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| Country | Link |
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| CN (1) | CN214905929U (en) |
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- 2020-10-21 CN CN202022352164.4U patent/CN214905929U/en active Active
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