CN204314398U - To break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges - Google Patents
To break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges Download PDFInfo
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- CN204314398U CN204314398U CN201420777197.5U CN201420777197U CN204314398U CN 204314398 U CN204314398 U CN 204314398U CN 201420777197 U CN201420777197 U CN 201420777197U CN 204314398 U CN204314398 U CN 204314398U
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- resistance
- thermopair
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- operational amplifier
- fired state
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Abstract
The utility model discloses and a kind ofly to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges, comprises thermopair, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and operational amplifier; Thermopair positive pole connects+3V battery, and described thermopair negative pole connects one end of the first resistance, and the other end of the first resistance connects+5V voltage, and described resistance R3 one end connects the negative pole of thermopair, and the other end connects the reverse input end of described operational amplifier; Described 4th resistance and the 3rd resistance form the feedback network of described operational amplifier, and wherein said 4th resistance two ends are the reverse input end of concatenation operation amplifier and one end of the 5th resistance respectively, and the other end of described 5th resistance is as signal output part.The utility model achieves gas-cooker battery voltage detection, and kitchen range fired state detects and thermopair connection status detects, and makes gas-cooker function more perfect, more intelligent.
Description
Technical field
The utility model relates to the Circuits System technical field of household gas utensils, specifically a kind ofly to break even circuit for detecting cell voltage, fired state and thermopair in the battery powered gas kitchen ranges of 3V.
Background technology
Along with gas kitchen ranges universal being equipped with thermojunction type pulse igniter, user realizes battery voltage detection for kitchen range, kitchen range fired state detect and the requirement of thermopair connection status detection also further urgent.
Utility model content
(1) technical matters that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide a kind ofly to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges.
(2) technical scheme
For achieving the above object, of the present utility modelly to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges, comprising thermopair, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and operational amplifier; Thermopair positive pole connects+3V battery, and described thermopair negative pole connects one end of the first resistance, and the other end of the first resistance connects+5V voltage, and described resistance R3 one end connects the negative pole of thermopair, and the other end connects the reverse input end of described operational amplifier; Described 4th resistance and the 3rd resistance form the feedback network of described operational amplifier, and wherein said 4th resistance two ends are the reverse input end of concatenation operation amplifier and one end of the 5th resistance respectively, and the other end of described 5th resistance is as signal output part.
Further, described second resistance is identical with the resistance of described 3rd resistance, and resistance is 10K.
Further, described 4th resistance is 1M.
Further, described operational amplifier positive source connects+5V voltage, power cathode ground connection.
(3) beneficial effect
Compared with prior art, the technical solution of the utility model has the following advantages: the utility model achieves gas-cooker battery voltage detection, and kitchen range fired state detects and thermopair connection status detects, and makes gas-cooker function more perfect, more intelligent.
Accompanying drawing explanation
Fig. 1 of the present utility modelly to break the schematic diagram of even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, of the present utility modelly to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges, comprising thermopair TCK, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and operational amplifier U1; Thermopair TCK positive pole connects+3V battery, described thermopair TCK negative pole connects one end of the first resistance R1, the other end of the first resistance R1 connects+5V voltage, and described resistance R3 one end connects the negative pole of thermopair TCK, and the other end connects the reverse input end of described operational amplifier U1; Described 4th resistance R4 and the 3rd resistance R3 forms the feedback network of described operational amplifier U1, wherein said 4th resistance R4 two ends are the reverse input end of concatenation operation amplifier U1 and one end of the 5th resistance R5 respectively, and the other end of described 5th resistance R5 is as signal output part.
Described second resistance R2 is identical with the resistance of described 3rd resistance R3, and resistance is 10K.
Described 4th resistance R4 resistance is 1M.The resistance setting of the second to the 4th resistance R4 has requirement, when the second resistance R2 is identical with the 3rd resistance R3 resistance, as differential amplifier, its amplifier out voltage is R4/R3 (V2-V3), in this circuit, R4/R3=100, namely amplifies 100 times.
Described operational amplifier positive source connects+5V voltage, power cathode ground connection.
The working method of utility model and principle:
Thermopair TCK positive pole meets anode+3V as shown in Figure 1; Thermopair negative pole is connected to operational amplifier U1 reverse input end by after the first resistance R1 pull-up 5V through the 3rd resistance R3;
4th resistance R4 and the 3rd resistance R3 form amplifier feedback network, feed back to output terminal after operational amplifier U1 reverse input end and the difference of input end signal are in the same way amplified 100 times through the 5th resistance R5;
Wherein the second resistance R2 is that operational amplifier U1 exports balance resistance; 5th resistance R5 is operational amplifier U2 output short circuit protection resistance;
Wherein cell voltage+3V can reduce in actual use;
5V in schematic diagram is that 3V boosts as 5V through DC-DC boost chip by cell voltage;
When thermopair TCK connects normal, and during kitchen range unburned, the signal that operational amplifier U1 outputs to output terminal is cell voltage+3V (being actual cell voltage when cell voltage reduces);
When thermopair TCK connects normal, during kitchen range ignition, thermopair TCK produces the back electromotive force of a millivolt level, thus causes operational amplifier U1 reverse input end input voltage lower than positive input voltage, produces the voltage difference of a millivolt level; This pressure reduction exports 5V to output terminal after operational amplifier U1 oppositely amplifies;
When thermopair disconnects, operational amplifier U1 inverting input input voltage is 5V, produces with input end in the same way the pressure reduction that one is lied prostrate level; This pressure reduction exports 0V to output terminal after operational amplifier U1 oppositely amplifies;
Output terminal connects the master controller of gas-cooker, carry out reporting to the police according to the setting of user or prompting.
The utility model achieves gas-cooker battery voltage detection, and kitchen range fired state detects and thermopair connection status detects, and makes gas-cooker function more perfect, more intelligent.
In sum, above-mentioned embodiment is not restricted embodiment of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation, all at technology category of the present utility model.
Claims (4)
1. to break an even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges, it is characterized in that: comprise thermopair, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and operational amplifier; Thermopair positive pole connects+3V battery, and described thermopair negative pole connects one end of the first resistance, and the other end of the first resistance connects+5V voltage, and described resistance R3 one end connects the negative pole of thermopair, and the other end connects the reverse input end of described operational amplifier; Described 4th resistance and the 3rd resistance form the feedback network of described operational amplifier, and wherein said 4th resistance two ends are the reverse input end of concatenation operation amplifier and one end of the 5th resistance respectively, and the other end of described 5th resistance is as signal output part.
2. to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges as claimed in claim 1, it is characterized in that: described second resistance is identical with the resistance of described 3rd resistance, and resistance is 10K.
3. to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges as claimed in claim 2, it is characterized in that: described 4th resistance is 1M.
4. to break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges as claimed in claim 3, it is characterized in that: described operational amplifier positive source connects+5V voltage, power cathode ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777197.5U CN204314398U (en) | 2014-12-10 | 2014-12-10 | To break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420777197.5U CN204314398U (en) | 2014-12-10 | 2014-12-10 | To break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204314398U true CN204314398U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420777197.5U Active CN204314398U (en) | 2014-12-10 | 2014-12-10 | To break even circuit for detecting cell voltage, fired state and thermopair in gas kitchen ranges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204314398U (en) |
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2014
- 2014-12-10 CN CN201420777197.5U patent/CN204314398U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |