CN205649394U - Prevent dry combustion method circuit - Google Patents
Prevent dry combustion method circuit Download PDFInfo
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- CN205649394U CN205649394U CN201620103894.1U CN201620103894U CN205649394U CN 205649394 U CN205649394 U CN 205649394U CN 201620103894 U CN201620103894 U CN 201620103894U CN 205649394 U CN205649394 U CN 205649394U
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- divider resistance
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- combustion method
- chip microcomputer
- dry combustion
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Abstract
The utility model relates to a prevent dry combustion method technical field, especially relate to a prevent dry combustion method circuit, the utility model discloses a prevent dry combustion method circuit, includes temperature controller normally closed contact, heating element, relay NO -contact, second source end, the singlechip that is connected gradually by first power end, and the one end that the temperature controller normally closed contact lies in the heating element still connects gradually a divider resistance, the 2nd divider resistance, earthing terminal, and the IO detection line connection of singlechip is lieing in between a divider resistance and the 2nd divider resistance, the utility model has the advantages of: for traditional prevent dry combustion method circuit, the structure is more simple, and need not not increase too much electron device, and the reliability is high, easy to maintain, also further reduction manufacturing cost.
Description
Technical field:
The present invention relates to anti-dry technical field, particularly relate to a kind of anti-dry circuit.
Background technology:
Anti-dry technology circuit is relatively conventional circuit in the culinary cuisine electrical equipment of domestic; traditional have coordinated by temperature-sensitive Magnet and permanent magnet; also there is the circuit being coordinated single-chip microcomputer by critesistor; but; above-mentioned embodiment often structure is complicated; can often complicated structure probably due to individual part malfunctioning, cause protected effect malfunctioning, and production cost be higher, is not suitable for popularization and application.
Summary of the invention:
It is an object of the invention to provide a kind of anti-dry circuit, specific purposes are the anti-dry technology circuit providing a kind of simple in construction and being easily maintained.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that a kind of anti-dry circuit, including the temperature controller normally closed contact being sequentially connected with by the first power end, heating element, relay normally open contact, second source end, single-chip microcomputer, it is characterized in that: temperature controller normally closed contact is positioned at one end of heating element and is also sequentially connected with the first divider resistance, the second divider resistance, earth terminal, the IO detection line of single-chip microcomputer is connected between the first divider resistance and the second divider resistance.
Further, the every 1ms of described single-chip microcomputer removes to judge the level state of corresponding I/O port detection line, and X*10ms is a cycle, and X is integer and is more than 3, when the low level more than about X/10+1 time being detected, is then judged as decompression state, now belongs to dry-fire condition.
Further, it is judged as decompression state when that the lasting low level value that described single-chip microcomputer IO detection line detects being more than 10ms, now belongs to dry-fire condition.
Further, the voltage between the first described power end and second source end is alternating current 220V, and the first divider resistance resistance is 1M, and the second divider resistance resistance is 100k.
Further, also concatenating by fuse between the first divider resistance and the second divider resistance.
Further, described single-chip microcomputer is provided with display module, the most whether is in dry-fire condition for display.
It is an advantage of the current invention that: relative to traditional anti-dry circuit, structure is the simplest, and need not increase too much electronic device, reliability is high, it is easy to safeguards, the most further reduces production cost.
Accompanying drawing illustrates:
Accompanying drawing 1 is the attachment structure figure of a kind of anti-dry circuit of embodiment 1.
Detailed description of the invention:
Embodiment 1: with reference to Fig. 1, a kind of anti-dry circuit, including the temperature controller WKQ normally closed contact WKQ-1 being sequentially connected with by the first power end N, heating element EH, relay K M normal opened contact KM-1, second source end L, single-chip microprocessor MCU, temperature controller WKQ normally closed contact WKQ-1 is positioned at one end of heating element EH and is also sequentially connected with the first divider resistance R3, the second divider resistance R4, earth terminal GND, and the IO detection line of single-chip microprocessor MCU is connected between the first divider resistance R3 and the second divider resistance R4.
Concrete, the voltage between the first power end N and second source end L is alternating current 220V, and the first divider resistance R3 resistance is 1M, and the second divider resistance R4 resistance is 100k.
In the present embodiment, the voltage that the IO of single-chip microprocessor MCU detects with the first divider resistance R3 and the second divider resistance R4 line is reduced to the voltage that below 5V can detect for single-chip microprocessor MCU, also will not damage single-chip microprocessor MCU.
Concrete, when under the state of non-dry combustion method, the normally closed contact WKQ-1 of temperature controller WKQ is closure state, the voltage now detected due to the IO detection line of single-chip microprocessor MCU is high level, single-chip microprocessor MCU then judges non-dry-fire condition, and when for dry-fire condition, the normally closed contact WKQ-1 of temperature controller WKQ disconnects, the voltage that now the IO detection line of single-chip microprocessor MCU detects is low level, and single-chip microprocessor MCU is then judged as dry-fire condition.
In order to overcome due to during detection due to when alternating voltage can be in zero point also for low level problem, the every 1ms of single-chip microprocessor MCU removes to judge the level state of corresponding I/O port detection line, X*10ms is a cycle, when the low level more than about X/10+1 time being detected, then it is judged as decompression state, now belonging to dry-fire condition, concrete X is integer and is more than 3.
Preferably, when the lasting low level value that the IO detection line of single-chip microprocessor MCU detects is more than 10ms when, it is judged as decompression state, now belongs to dry-fire condition.
In order to further protection single-chip microprocessor MCU will cause single-chip microprocessor MCU to puncture owing to resistance damages, further, also concatenating by fuse between the first divider resistance R3 and the second divider resistance R4.
For the state of further call user's attention dry combustion method, single-chip microprocessor MCU is provided with display module, the most whether is in dry-fire condition for display.
Certainly, these are only better embodiment of the present invention, not limit the range of the present invention with this, therefore, every make in the principle of the invention equivalence change should be included in protection scope of the present invention.
Claims (6)
1. an anti-dry circuit, including the temperature controller normally closed contact being sequentially connected with by the first power end, heating element, relay normally open contact, second source end, single-chip microcomputer, it is characterized in that: temperature controller normally closed contact is positioned at one end of heating element and is also sequentially connected with the first divider resistance, the second divider resistance, earth terminal, the IO detection line of single-chip microcomputer is connected between the first divider resistance and the second divider resistance.
A kind of anti-dry circuit the most according to claim 1, it is characterized in that: the every 1ms of described single-chip microcomputer removes to judge the level state of corresponding I/O port detection line, X*10ms is a cycle, X is integer and is more than 3, when the low level more than about X/10+1 time being detected, then it is judged as decompression state, now belongs to dry-fire condition.
A kind of anti-dry circuit the most according to claim 2, it is characterised in that: it is judged as decompression state when that the lasting low level value that described single-chip microcomputer IO detection line detects being more than 10ms, now belongs to dry-fire condition
4. according to a kind of anti-dry circuit described in claim 1 or 2 or 3, it is characterised in that: the voltage between the first described power end and second source end is alternating current 220V, and the first divider resistance resistance is 1M, and the second divider resistance resistance is 100k
5. according to a kind of anti-dry circuit described in claim 1 or 2 or 3, it is characterised in that: also concatenating by fuse between the first divider resistance and the second divider resistance
6. according to a kind of anti-dry circuit described in claim 1 or 2 or 3, it is characterised in that: described single-chip microcomputer is provided with display module, the most whether is in dry-fire condition for display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620103894.1U CN205649394U (en) | 2016-02-02 | 2016-02-02 | Prevent dry combustion method circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620103894.1U CN205649394U (en) | 2016-02-02 | 2016-02-02 | Prevent dry combustion method circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205649394U true CN205649394U (en) | 2016-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620103894.1U Active CN205649394U (en) | 2016-02-02 | 2016-02-02 | Prevent dry combustion method circuit |
Country Status (1)
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| CN (1) | CN205649394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105559617A (en) * | 2016-02-02 | 2016-05-11 | 广东天际电器股份有限公司 | Dry burning preventing circuit |
-
2016
- 2016-02-02 CN CN201620103894.1U patent/CN205649394U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105559617A (en) * | 2016-02-02 | 2016-05-11 | 广东天际电器股份有限公司 | Dry burning preventing circuit |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220826 Address after: 515000 quality inspection building on the west side of unit C03, nanshanwan Industrial Park, Binhai street, Haojiang District, Shantou City, Guangdong Province Patentee after: Shantou Tianji Electric Appliance Industry Co.,Ltd. Address before: 515000 area 12-12, Jinyuan Industrial City, Chaoshan Road, Shantou City, Guangdong Province Patentee before: GUANGDONG TONZE ELECTRIC Co.,Ltd. |