CN212932759U - Surge detection circuit and cooking utensil - Google Patents
Surge detection circuit and cooking utensil Download PDFInfo
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- CN212932759U CN212932759U CN202020100583.6U CN202020100583U CN212932759U CN 212932759 U CN212932759 U CN 212932759U CN 202020100583 U CN202020100583 U CN 202020100583U CN 212932759 U CN212932759 U CN 212932759U
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000010411 cooking Methods 0.000 title claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 25
- 238000010168 coupling process Methods 0.000 claims abstract description 25
- 238000005859 coupling reaction Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 3
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a surge detection circuitry and cooking utensil. Wherein, this surge detection circuit includes: the voltage divider is respectively connected with the filter device and the coupling device, the filter device and the coupling device are connected with a first pin of the control chip, the voltage of the input voltage of the circuit is divided by the voltage divider, and the divided voltage is transmitted to the control chip through the filter device and the coupling device. The utility model provides an because lack among the prior art and carry out the circuit that effectively detects to the surge, the easy impaired technical problem of household electrical appliances circuit that leads to.
Description
Technical Field
The utility model relates to a household electrical appliances make technical field, particularly, relate to a surge detection circuit and cooking utensil.
Background
Circuits often produce high operating overvoltages in the event of lightning strikes and when inductive or large loads are switched on, off, such transient overvoltages (or overcurrents), known as surge voltages (or surge currents), are a type of transient disturbance.
In the application process of the existing household appliance circuit, transient interference caused by an external power supply is often encountered, wherein the transient interference is usually generated by power grid fluctuation, and how to effectively detect surge generation of the household appliance circuit becomes a problem which needs to be solved urgently.
Aiming at the problem that the household appliance circuit is easy to damage due to the lack of a circuit for effectively detecting the surge in the prior art, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a surge detection circuitry and cooking utensil to at least, solve because lack among the prior art and carry out the circuit that effectively detects to the surge, the easy impaired technical problem of household electrical appliances circuit that leads to.
According to the utility model discloses an aspect of the embodiment provides a surge detection circuit, include: the voltage divider is respectively connected with the filter device and the coupling device, the filter device and the coupling device are connected with a first pin of the control chip, the voltage divider divides the input voltage of the circuit and transmits the divided voltage to the control chip through the filter device and the coupling device, so that the voltage of a power grid or the circuit suddenly generates interference pulses, the internal comparator overturns to generate an interrupt signal, and the CPU interrupt service subprogram sends a command of suspending heating.
Optionally, the voltage divider comprises: the circuit comprises a first resistor, a second resistor and a third resistor, wherein the first resistor, the second resistor and the third resistor are connected in series to divide the input voltage of the circuit, so that the subsequent circuit is prevented from being broken due to voltage overload.
Further, optionally, the coupling device includes: a first capacitor; the first end of the first capacitor is connected in parallel with the first end of the second resistor, the second end of the first capacitor is connected with the output end of the third resistor and is connected to the first pin of the control chip, and a coupling channel is provided for the interference pulse, so that a coupling channel is provided for the interference pulse.
Optionally, the filtering device includes: the first end of the second capacitor is connected with the second end of the first capacitor, and the second end of the second capacitor is grounded; the first end of the second capacitor and the second end of the first capacitor are connected to a first pin of the control chip; so that the signal in the circuit is filtered to reduce signal interference.
Optionally, the surge detection circuit further includes: heating device, heating device are connected with control chip, and the interrupt signal that sends according to control chip stops the heating to make after the surge is produced, through interrupt signal in time pause heating device's heating state, avoid the damage to household electrical appliances.
According to another aspect of the embodiments of the present invention, there is provided a cooking appliance, including: and the surge detection circuit comprises the surge detection circuit.
Optionally, the cooking appliance comprises: an electric pressure cooker.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic diagram of a surge detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a surge detection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below 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 shall belong to the protection scope of the present invention.
Example 1
According to an aspect of the embodiments of the present invention, there is provided a surge detection circuit, fig. 1 is a schematic diagram of the surge detection circuit according to the embodiments of the present invention, as shown in fig. 1, including: the voltage divider 12, the filter 14, the coupling device 16 and the control chip 18, wherein the voltage divider 12 is connected to the filter 14 and the coupling device 16, respectively, the filter 14 and the coupling device 16 are connected to a first pin of the control chip 18, and the voltage divider 12 divides the input voltage of the circuit and transmits the divided voltage to the control chip 18 through the filter 14 and the coupling device 16. So that the network voltage or the circuit suddenly generates interference pulses, when the voltage on the corresponding detection pin on the control chip 18 is greater than 2.5V, the internal comparator is turned over to generate an interrupt signal, and the CPU interrupt service subroutine sends a command of suspending heating.
As shown in fig. 1, in the surge detection circuit provided in the embodiment of the present application, the voltage input to the circuit is divided by the voltage divider 12, and the input voltage is adjusted to meet the voltage required by the circuit load, where the circuit load may include the control chip 18 in the embodiment of the present application, the voltage required by the surge detection circuit is obtained by dividing the input voltage by the voltage divider 12, and then the interference signal in the voltage signal is filtered by the filter device 14, so as to reduce the signal interference.
The coupling device 16 couples interference pulses carried in the input voltage to avoid the interference of the control chip 18 on the judgment of the voltage signal, the control chip 18 judges whether the input voltage is greater than a preset value according to the voltage signal processed by the voltage divider 12, the filter device 14 and the coupling device 16, in the embodiment of the present application, the preset value takes 2.5V as an example, if the preset value is greater than 2.5V, it is determined that a surge is generated in a power grid or a circuit, in order to avoid the damage to the household electrical appliance, the control chip 18 generates an interrupt signal, the interrupt signal is sent to a power device in the household electrical appliance to stop the current working state of the power device, for example, the power device in the embodiment of the present application may be a heating device, and the heating device stops heating according to the interrupt signal output by the control.
Optionally, the voltage divider 12 includes: the circuit comprises a first resistor, a second resistor and a third resistor, wherein the first resistor, the second resistor and the third resistor are connected in series to divide the input voltage of the circuit, so that the subsequent circuit is prevented from being broken due to voltage overload.
As shown in fig. 2, the first resistor, the second resistor and the third resistor are respectively marked as R1, R2 and R3 in fig. 2, and as shown in fig. 2, R1, R2 and R3 are connected in series to the surge detection circuit in the embodiment of the present application, and the input voltage is divided by the voltage division of R1, R2 and R3 in the surge detection circuit, so as to avoid the control chip 18 in the circuit and the heating device connected to the control chip 18 from being burnt out due to the excessive voltage in the circuit. In addition, as shown in fig. 2, the surge detection circuit in the embodiment of the present application further includes a fourth resistor, which is labeled as R4, wherein R4 is connected into the circuit as a reference resistor for dividing the voltage in the circuit together with R1, R2 and R3, so as to avoid the voltage overload from breaking the subsequent circuit.
Further, optionally, the coupling device 16 includes: a first capacitor; the first end of the first capacitor is connected in parallel with the first end of the second resistor, and the second end of the first capacitor is connected with the output end of the third resistor, and is connected to the first pin of the control chip 18, so as to provide a coupling channel for the interference pulse.
As shown in fig. 2, the first capacitors are labeled C6, C6 is connected in parallel with R2, so that the first terminal of C6 is connected to the first terminal of R2, and since R2 and R3 are connected in series, C6 is also connected in parallel with R3, so that the second terminal of C6 is connected to the second terminal of R3 (i.e., the output terminal in the embodiment of the present application) and is connected to the first pin of the control chip 18, so as to provide a coupling channel for the interference pulses in the input voltage, and avoid the interference pulses from interfering with the voltage signal of the input voltage, thereby affecting the determination of the voltage signal by the control chip 18.
Optionally, the filtering device 14 includes: the first end of the second capacitor is connected with the second end of the first capacitor, and the second end of the second capacitor is grounded; the first end of the second capacitor and the second end of the first capacitor are connected to a first pin of the control chip 18; so that the signal in the circuit is filtered to reduce signal interference.
As shown in fig. 2, the second capacitor is labeled as C7, and C7 is connected in series with C6, so the first end of C7 is connected to the second end of C6, the second end of C7 is grounded, and through the connection relationship between C6 and each resistor in the voltage divider 12, the first end of C7 and the second end of C6 are connected to the control chip 18, that is, the input voltage is divided, coupled, filtered, and finally the processed voltage signal is input to the control chip 18, and is determined by the control chip 18, wherein the voltage signal in the circuit is filtered through C7, so that the interference of the voltage signal is reduced.
Optionally, the control chip 18 determines whether the detected voltage is greater than a preset value through the first pin under the condition that the grid voltage or the circuit generates the interference pulse, and if the detected voltage is greater than the preset value, the determination is timely and effectively performed through the detection of the voltage value.
Optionally, the surge detection circuit provided in the embodiment of the present application further includes: and the heating device is connected with the control chip 18, receives an interrupt signal sent by the control chip 18 under the condition that the voltage is greater than a preset value, and stops heating according to the interrupt signal, so that after surge is generated, the heating state of the heating device is suspended in time through the interrupt signal, and the household appliance is prevented from being damaged.
Because the surge in electric wire netting and the circuit is easy to play the destruction effect to electrical apparatus, especially the power device among the household electrical appliances in this application embodiment, influence the normal work of power device, through control chip 18 to the judgement of the voltage signal of input voltage, can in the twinkling of an eye that the surge produced, in time judge to make timely control operation, ensure heating device normal operating, promote household electrical appliances's life.
In summary, fig. 2 is a schematic diagram of a surge detection circuit according to an embodiment of the present invention, wherein in the surge detection circuit provided in the embodiment of the present invention, a first resistor in the voltage divider 12 is labeled as R1, a second resistor is labeled as R2, a third resistor is labeled as R3, a first capacitor in the coupling device 16 is labeled as C6, a second capacitor in the filter 14 is labeled as C7, and the control chip 18 is labeled as IC 103;
as shown in fig. 2, in the surge detection circuit provided in the embodiment of the present application, R1, R2, and R3 divide voltage, and C6 provides a coupling channel for interference pulses, and the interference pulses are filtered by C7 and sent to the first pin of the IC103 for detection (the first pin is a positive input terminal of a comparator, and the comparison voltage is 2.5V); when the circuit works normally, the average voltage (measured by a multimeter) on a corresponding detection pin (a first pin of the IC 103) on the control chip is about 1.1V; when the power grid voltage or the circuit suddenly generates interference pulses and the voltage (instantaneous voltage) on the corresponding detection pin on the control chip is larger than 2.5V, the comparator inside the control chip is turned over to generate an interrupt signal, and the interrupt service subprogram of the control chip sends a command of suspending heating.
It should be noted that the numerical values provided in the embodiments of the present application are only subject to implementation of the surge detection circuit provided in the embodiments of the present application, and are not particularly limited.
Example 2
According to another aspect of the embodiments of the present invention, there is provided a cooking appliance, including: a surge detection circuit, wherein the surge detection circuit includes the surge detection circuit in embodiment 1 described above.
Optionally, the cooking utensil that this application embodiment provided includes: an electric pressure cooker.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A surge detection circuit, comprising:
a voltage divider, a filter, a coupler and a control chip,
the voltage divider is respectively connected with the filter device and the coupling device, the filter device and the coupling device are connected with the first pin of the control chip, the voltage divider divides the input voltage of the circuit, and the divided voltage is transmitted to the control chip through the filter device and the coupling device.
2. The surge detection circuit of claim 1, wherein the voltage divider comprises: a first resistor, a second resistor, and a third resistor, wherein,
the first resistor is connected in series with the second resistor and the third resistor to divide the input voltage of the circuit.
3. The surge detection circuit of claim 2, wherein the coupling means comprises: a first capacitor; the first end of the first capacitor is connected with the first end of the second resistor in parallel, the second end of the first capacitor is connected with the output end of the third resistor and is connected into the first pin of the control chip, and a coupling channel is provided for interference pulses.
4. The surge detection circuit of claim 3, wherein the filtering means comprises: a second capacitor, wherein a first end of the second capacitor is connected to a second end of the first capacitor, and a second end of the second capacitor is grounded; the first end of the second capacitor and the second end of the first capacitor are connected to the first pin of the control chip.
5. The surge detection circuit of claim 1, further comprising: and the heating device is connected with the control chip and stops heating according to the interrupt signal sent by the control chip.
6. A cooking appliance, comprising: a surge detection circuit, wherein the surge detection circuit comprises the surge detection circuit of any of claims 1 to 5.
7. The cooking appliance of claim 6, wherein the cooking appliance comprises: an electric pressure cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020100583.6U CN212932759U (en) | 2020-01-16 | 2020-01-16 | Surge detection circuit and cooking utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020100583.6U CN212932759U (en) | 2020-01-16 | 2020-01-16 | Surge detection circuit and cooking utensil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212932759U true CN212932759U (en) | 2021-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020100583.6U Active CN212932759U (en) | 2020-01-16 | 2020-01-16 | Surge detection circuit and cooking utensil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212932759U (en) |
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2020
- 2020-01-16 CN CN202020100583.6U patent/CN212932759U/en active Active
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