CN205483168U - Water level detection circuit and electric rice cooker - Google Patents
Water level detection circuit and electric rice cooker Download PDFInfo
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- CN205483168U CN205483168U CN201521064941.8U CN201521064941U CN205483168U CN 205483168 U CN205483168 U CN 205483168U CN 201521064941 U CN201521064941 U CN 201521064941U CN 205483168 U CN205483168 U CN 205483168U
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Abstract
The utility model provides a water level detection circuit, is including the water level detection circuit that connects gradually, water level signal transfer circuit and receive the microprocessor of water level signal, water level detection circuit and power VDD are connected, water level signal transfer circuit is connected with power VCC, water level detection circuit examines water level electrode including the first water level electrode of examining and the second that insert electric rice cooker, works as when first water level electrode of examining and second are examined water level electrode and are not communicate, the water level detection circuit switch on, power VDD and power VCC all supply power for water level signal transfer circuit, microprocessor is given to water level signal transfer circuit output low voltage output signal, when water level electrode is examined when water communicates to first water level electrode of examining and second, the water level detection circuit do not switch on, power VDD does not give the power supply of water level signal transfer circuit, power VCC gives the power supply of water level signal transfer circuit, water level signal transfer circuit output the high pressrue output signal gives microprocessor.
Description
Technical field
This utility model relates to household electrical appliance, particularly a kind of water level detection circuit and electric cooker.
Background technology
Existing cooking apparatus, such as electric pressure cooking saucepan, electric cooker etc., in order to avoid heating power is excessive and cause spilling, need in cooking apparatus, arrange water level detection circuit, detect with the blister produced during to the water level in cooking apparatus or boiling, and how can accurately and efficiently realize the water level in cooking apparatus or blister are detected the technical problem becoming urgently to be resolved hurrily.
Summary of the invention
This utility model provides and a kind of can effectively detect water level and boiling bubble in pot and carry out the water level detection circuit of anti-Spill stopping pan.
This utility model additionally provides a kind of electric cooker using above-mentioned water level detection circuit.
The technical solution adopted in the utility model is:
A kind of water level detection circuit, it is characterized in that: include the water-level detecting circuit being sequentially connected with, water level signal transmits circuit and receives the microprocessor of water level signal, described water-level detecting circuit is connected with power vd D, described water level signal transmits circuit and is connected with power supply VCC, described water-level detecting circuit includes the first inspection level electrode and the second inspection level electrode inserting electric cooker, when described first examines level electrode and the second inspection level electrode does not connect, described water-level detecting circuit turn-on, described power vd D all powers to water level signal transfer circuit with power supply VCC, described water level signal transmits circuit output low pressure and outputs signal to microprocessor, now water level is the highest or do not has bubble in pot；When described first examines level electrode and the second inspection level electrode connects through water, described water-level detecting circuit is not turned on, described power vd D powers to water level signal transfer circuit, described power supply VCC powers to water level signal transfer circuit, described water level signal transmission circuit output High voltage output signal is to microprocessor, and now water level raises or has bubble in pot.This utility model changes the output state of water-level detecting circuit by two open circuits examining level electrodes or short circuit, so that the output voltage signal that water level signal transmits circuit is different, judge whether water level raises or whether have bubble to produce in pot, water level conditions in pot, anti-Spill stopping pan can accurately be detected.
Further, described water-level detecting circuit also includes a turning circuit, described turning circuit is connected to power vd D and water level signal transmits between circuit, when described first examines level electrode and the second inspection level electrode does not connect, turning circuit turns on, when described first examines level electrode and the second inspection level electrode connects through water, turning circuit is not turned on.
Further, described turning circuit includes audion Q1 and the audion Q2 being connected in parallel, the base stage of described audion Q1 is connected with power vd D through resistance R1, the colelctor electrode of described audion Q1 is connected with power vd D, the base stage of described audion Q1 is connected with the base stage of audion Q2, the emitter stage of described audion Q1 is connected with the emitter stage of audion Q2, the grounded collector of described audion Q2, described water level signal transmits the input of circuit and is connected on the emitter stage of described audion Q1 and the emitter stage junction point of audion Q2.
Further, described first inspection level electrode is connected on the base stage of audion Q1 and the base connection point of audion Q2, described second inspection level electrode ground connection.When water level raises or has bubble in pot, first inspection level electrode and the second inspection level electrode are connected by water, power vd D powers to audion Q1 with audion Q2, audion Q1 is not turned on, turning circuit is not turned on, described water level signal transmits circuit output High voltage output signal to microprocessor, when water level is the highest or does not has bubble in pot, first inspection level electrode and the second inspection level electrode do not connect, power vd D powers with audion Q2 to audion Q1, audion Q1 turns on, turning circuit turns on, described water level signal transmits circuit output low pressure and outputs signal to microprocessor.
Further, being connected and have electric capacity C1 between base stage and the ground of described audion Q2, it is more stable that C1 filtering makes VDD power.
Further, described water level signal transmits circuit and includes a bleeder circuit, described bleeder circuit is connected with power supply VCC, connect on described bleeder circuit and have switching it on or the optocoupler U1 disconnected, the input of described optocoupler U1 is connected to control on the turning circuit of its break-make, and the filtered circuit of dividing point of described bleeder circuit is connected with microprocessor.When turning circuit turns on, optocoupler secondary turns on, bleeder circuit turns on, now power supply VCC the most filtered circuit after dividing potential drop sends microprocessor to, i.e. output High voltage output signal is to microprocessor, when turning circuit is not turned on, optocoupler secondary is not turned on, bleeder circuit is not turned on, and now the direct filtered circuit of power supply VCC sends microprocessor to, i.e. output low pressure outputs signal to microprocessor.
Further, described bleeder circuit is composed in series by resistance R4 and resistance R3, and described resistance R4 is connected with power supply VCC, described resistance R3 ground connection, and described optocoupler U1 is connected between resistance R4 and resistance R3.
Further, described filtered electrical routing resistance R5 and electric capacity C2 is composed in series, and described resistance R5 is connected on the junction point of resistance R4 and optocoupler U1, and described electric capacity C2 ground connection, described microprocessor is connected on the junction point of resistance R5 and electric capacity C2.
Further, the input of described optocoupler U1 is through resistance R2 ground connection.
A kind of electric cooker, it is characterised in that: include above-mentioned water level detection circuit.
The beneficial effects of the utility model: in effectively detecting pot, water level carrys out anti-Spill stopping pan with boiling bubble.
Accompanying drawing explanation
Fig. 1 is this utility model electrical block diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is further described, but this utility model is not confined to these detailed description of the invention.One skilled in the art would recognize that all alternatives, improvement project and equivalents that this utility model is potentially included in covering Claims scope.
Embodiment one
With reference to Fig. 1, a kind of water level detection circuit, including the water-level detecting circuit 1 being sequentially connected with, water level signal transmits circuit 2 and receives the microprocessor U2 of water level signal, described water-level detecting circuit 1 is connected with power vd D, described water level signal transmits circuit 2 and is connected with power supply VCC, described water-level detecting circuit 1 includes the first inspection level electrode 11 and the second inspection level electrode 12 inserting electric cooker, when described first inspection level electrode 11 does not connect with the second inspection level electrode 12, described water-level detecting circuit 1 turns on, described power vd D all powers to water level signal transfer circuit 2 with power supply VCC, described water level signal transmission circuit 2 exports low pressure and outputs signal to microprocessor U2, now water level is the highest or do not has bubble in pot；When described first inspection level electrode 11 connects through water with the second inspection level electrode 12, described water-level detecting circuit 1 is not turned on, described power vd D powers to water level signal transfer circuit 2, described power supply VCC powers to water level signal transfer circuit 2, described water level signal transmits circuit 2 and exports High voltage output signal to microprocessor U2, and now water level raises or has bubble in pot.This utility model changes the output state of water-level detecting circuit 1 by two open circuits examining level electrodes or short circuit, so that the output voltage signal that water level signal transmits circuit 2 is different, judge whether water level raises or whether have bubble to produce in pot, water level conditions in pot, anti-Spill stopping pan can accurately be detected.
Described in the present embodiment, water-level detecting circuit 1 also includes a turning circuit, described turning circuit is connected to power vd D and water level signal transmits between circuit 2, when described first inspection level electrode 11 does not connect with the second inspection level electrode 12, turning circuit turns on, when described first inspection level electrode 11 connects through water with the second inspection level electrode 12, turning circuit is not turned on.Described turning circuit includes audion Q1 and the audion Q2 being connected in parallel, the base stage of described audion Q1 is connected with power vd D through resistance R1, the colelctor electrode of described audion Q1 is connected with power vd D, the base stage of described audion Q1 is connected with the base stage of audion Q2, the emitter stage of described audion Q1 is connected with the emitter stage of audion Q2, the grounded collector of described audion Q2, it is connected between base stage and the ground of described audion Q2 and has electric capacity C1, it is more stable that C1 filtering makes VDD power, described water level signal transmits the input of circuit 2 and is connected on the emitter stage of described audion Q1 and the emitter stage junction point of audion Q2.Described first inspection level electrode is connected on the base stage of audion Q1 and the base connection point of audion Q2, described second inspection level electrode ground connection.When water level raises or has bubble in pot, first inspection level electrode 11 is connected by water with the second inspection level electrode 12, power vd D powers to audion Q1 with audion Q2, audion Q1 is not turned on, turning circuit is not turned on, described water level signal transmits circuit 2 and exports High voltage output signal to microprocessor U2, when water level is the highest or does not has bubble in pot, first inspection level electrode 11 does not connects with the second inspection level electrode 12, power vd D powers with audion Q2 to audion Q1, audion Q1 turns on, turning circuit turns on, described water level signal transmission circuit 2 exports low pressure and outputs signal to microprocessor U2.
Water level signal described in the present embodiment transmits circuit 2 and includes a bleeder circuit, described bleeder circuit is connected with power supply VCC, connect on described bleeder circuit and have switching it on or the optocoupler U1 disconnected, the input of described optocoupler U1 is connected to control on the turning circuit of its break-make, and the filtered circuit of dividing point of described bleeder circuit is connected with microprocessor U2.When turning circuit turns on, U1 level conducting of optocoupler, bleeder circuit turns on, and now power supply VCC the most filtered circuit after dividing potential drop sends microprocessor U2 to, i.e. output low pressure outputs signal to microprocessor U2；When turning circuit is not turned on, U1 level of optocoupler is not turned on, and bleeder circuit is not turned on, and now the direct filtered circuit of power supply VCC sends microprocessor U2 to, i.e. output High voltage output signal is to microprocessor.Described bleeder circuit is composed in series by resistance R4 and resistance R3, and described resistance R4 is connected with power supply VCC, described resistance R3 ground connection, and described optocoupler U1 is connected between resistance R4 and resistance R3.Described filtered electrical routing resistance R5 and electric capacity C2 is composed in series, and described resistance R5 is connected on the junction point of resistance R4 and optocoupler U1, and described electric capacity C2 ground connection, described microprocessor is connected on the junction point of resistance R5 and electric capacity C2.The input of described optocoupler U1 is through resistance R2 ground connection.
First inspection level electrode the 11, second inspection level electrode 12 of the present utility model, resistance R1, audion Q1, audion Q2, electric capacity C1 form water-level detecting circuit 1.Optocoupler U1, resistance R2, R4, R5, R3, C2 composition water level signal transmit circuit 2.Microprocessor U2 receives water level signal.Power supply has two-way: VDD and VCC.During use, the first inspection level electrode 11, second is examined level electrode 12 electrode and is inserted in electric cooker.
There are two kinds of situations in this utility model, specific as follows:
The first situation: water level is the highest, or in the case of there is no bubble in pot, together with first inspection level electrode 11 is not attached to the second inspection level electrode 12, power vd D passes through resistance R1 to audion Q1, Q2 powers, electric capacity C1 filtering makes power supply stable, now audion Q1 conducting, audion Q2 closes, power vd D is powered to optocoupler U1 by audion Q1, make the secondary conducting of optocoupler U1, power supply VCC is through resistance R4, optocoupler is secondary, resistance R3 dividing potential drop, filter through resistance R5 and electric capacity C2 again and send microprocessor U2 to, what now water level signal transmitted circuit 2 output is low pressure output signal.
The second situation: water level raises, or alveolate in pot in the case of, the first inspection level electrode 11 and the second inspection level electrode 12 are by aqueous phase even, be equivalent to short circuit, power vd D is by electric pole short circuit, it is impossible to power to audion Q1, Q2, audion Q1 is not turned on, power vd D can not be powered to optocoupler U1 by audion Q1, and U1 level of optocoupler is not turned on, and power supply VCC is directly over resistance R5 and electric capacity C2 filtering, sending microprocessor U2 to, what now water level signal transmitted circuit 2 output is High voltage output signal.
Because the voltage signal sending microprocessor U2 to of two kinds of situations is had any different, it is possible to detect whether water level is too high, or have bubble to produce in pot.
Embodiment two
With reference to Fig. 1, a kind of electric cooker, including water level detection circuit, described water level detection circuit includes the water-level detecting circuit 1 being sequentially connected with, water level signal transmits circuit 2 and receives the microprocessor U2 of water level signal, described water-level detecting circuit 1 is connected with power vd D, described water level signal transmits circuit 2 and is connected with power supply VCC, described water-level detecting circuit 1 includes the first inspection level electrode 11 and the second inspection level electrode 12 inserting electric cooker, when described first inspection level electrode 11 does not connect with the second inspection level electrode 12, described water-level detecting circuit 1 turns on, described power vd D all powers to water level signal transfer circuit 2 with power supply VCC, described water level signal transmission circuit 2 exports low pressure and outputs signal to microprocessor U2, now water level is the highest or do not has bubble in pot；When described first inspection level electrode 11 connects through water with the second inspection level electrode 12, described water-level detecting circuit 1 is not turned on, described power vd D powers to water level signal transfer circuit 2, described power supply VCC powers to water level signal transfer circuit 2, described water level signal transmits circuit 2 and exports High voltage output signal to microprocessor U2, and now water level raises or has bubble in pot.This utility model changes the output state of water-level detecting circuit 1 by two open circuits examining level electrodes or short circuit, so that the output voltage signal that water level signal transmits circuit 2 is different, judge whether water level raises or whether have bubble to produce in pot, water level conditions in pot, anti-Spill stopping pan can accurately be detected.
Described in the present embodiment, water-level detecting circuit 1 also includes a turning circuit, described turning circuit is connected to power vd D and water level signal transmits between circuit 2, when described first inspection level electrode 11 does not connect with the second inspection level electrode 12, turning circuit turns on, when described first inspection level electrode 11 connects through water with the second inspection level electrode 12, turning circuit is not turned on.Described turning circuit includes audion Q1 and the audion Q2 being connected in parallel, the base stage of described audion Q1 is connected with power vd D through resistance R1, the colelctor electrode of described audion Q1 is connected with power vd D, the base stage of described audion Q1 is connected with the base stage of audion Q2, the emitter stage of described audion Q1 is connected with the emitter stage of audion Q2, the grounded collector of described audion Q2, it is connected between base stage and the ground of described audion Q2 and has electric capacity C1, it is more stable that C1 filtering makes VDD power, described water level signal transmits the input of circuit 2 and is connected on the emitter stage of described audion Q1 and the emitter stage junction point of audion Q2.Described first inspection level electrode is connected on the base stage of audion Q1 and the base connection point of audion Q2, described second inspection level electrode ground connection.When water level raises or has bubble in pot, first inspection level electrode 11 is connected by water with the second inspection level electrode 12, power vd D powers to audion Q1 with audion Q2, audion Q1 is not turned on, turning circuit is not turned on, described water level signal transmits circuit 2 and exports High voltage output signal to microprocessor U2, when water level is the highest or does not has bubble in pot, first inspection level electrode 11 does not connects with the second inspection level electrode 12, power vd D powers with audion Q2 to audion Q1, audion Q1 turns on, turning circuit turns on, described water level signal transmission circuit 2 exports low pressure and outputs signal to microprocessor U2.
Water level signal described in the present embodiment transmits circuit 2 and includes a bleeder circuit, described bleeder circuit is connected with power supply VCC, connect on described bleeder circuit and have switching it on or the optocoupler U1 disconnected, the input of described optocoupler U1 is connected to control on the turning circuit of its break-make, and the filtered circuit of dividing point of described bleeder circuit is connected with microprocessor U2.When turning circuit turns on, U1 level conducting of optocoupler, bleeder circuit turns on, and now power supply VCC the most filtered circuit after dividing potential drop sends microprocessor U2 to, i.e. output low pressure outputs signal to microprocessor U2；When turning circuit is not turned on, U1 level of optocoupler is not turned on, and bleeder circuit is not turned on, and now the direct filtered circuit of power supply VCC sends microprocessor U2 to, i.e. output High voltage output signal is to microprocessor.Described bleeder circuit is composed in series by resistance R4 and resistance R3, and described resistance R4 is connected with power supply VCC, described resistance R3 ground connection, and described optocoupler U1 is connected between resistance R4 and resistance R3.Described filtered electrical routing resistance R5 and electric capacity C2 is composed in series, and described resistance R5 is connected on the junction point of resistance R4 and optocoupler U1, and described electric capacity C2 ground connection, described microprocessor is connected on the junction point of resistance R5 and electric capacity C2.The input of described optocoupler U1 is through resistance R2 ground connection.
First inspection level electrode the 11, second inspection level electrode 12 of the present utility model, resistance R1, audion Q1, audion Q2, electric capacity C1 form water-level detecting circuit 1.Optocoupler U1, resistance R2, R4, R5, R3, C2 composition water level signal transmit circuit 2.Microprocessor U2 receives water level signal.Power supply has two-way: VDD and VCC.During use, the first inspection level electrode 11, second is examined level electrode 12 electrode and is inserted in electric cooker.
There are two kinds of situations in this utility model, specific as follows:
The first situation: water level is the highest, or in the case of there is no bubble in pot, together with first inspection level electrode 11 is not attached to the second inspection level electrode 12, power vd D passes through resistance R1 to audion Q1, Q2 powers, electric capacity C1 filtering makes power supply stable, now audion Q1 conducting, audion Q2 closes, power vd D is powered to optocoupler U1 by audion Q1, make the secondary conducting of optocoupler U1, power supply VCC is through resistance R4, optocoupler is secondary, resistance R3 dividing potential drop, filter through resistance R5 and electric capacity C2 again and send microprocessor U2 to, what now water level signal transmitted circuit 2 output is low pressure output signal.
The second situation: water level raises, or alveolate in pot in the case of, the first inspection level electrode 11 and the second inspection level electrode 12 are by aqueous phase even, be equivalent to short circuit, power vd D is by electric pole short circuit, it is impossible to power to audion Q1, Q2, audion Q1 is not turned on, power vd D can not be powered to optocoupler U1 by audion Q1, and U1 level of optocoupler is not turned on, and power supply VCC is directly over resistance R5 and electric capacity C2 filtering, sending microprocessor U2 to, what now water level signal transmitted circuit 2 output is High voltage output signal.
Because the voltage signal sending microprocessor U2 to of two kinds of situations is had any different, it is possible to detect whether water level is too high, or have bubble to produce in pot.
Claims (10)
1. a water level detection circuit, it is characterized in that: include the water-level detecting circuit connected, water level signal transmits circuit and receives the microprocessor of water level signal, described water-level detecting circuit is connected with power vd D, described water level signal transmits circuit and is connected with power supply VCC, described water-level detecting circuit includes the first inspection level electrode and the second inspection level electrode inserting electric cooker, when described first examines level electrode and the second inspection level electrode does not connect, described water-level detecting circuit turn-on, described power vd D all powers to water level signal transfer circuit with power supply VCC, described water level signal transmits circuit output low pressure and outputs signal to microprocessor, now water level is the highest or do not has bubble in pot；When described first examines level electrode and the second inspection level electrode connects through water, described water-level detecting circuit is not turned on, described power vd D powers to water level signal transfer circuit, described power supply VCC powers to water level signal transfer circuit, described water level signal transmission circuit output High voltage output signal is to microprocessor, and now water level raises or has bubble in pot.
2. water level detection circuit as claimed in claim 1, it is characterized in that: described water-level detecting circuit also includes a turning circuit, described turning circuit is connected to power vd D and water level signal transmits between circuit, when described first examines level electrode and the second inspection level electrode does not connect, turning circuit turns on, when described first examines level electrode and the second inspection level electrode connects through water, turning circuit is not turned on.
3. water level detection circuit as claimed in claim 2, it is characterized in that: described turning circuit includes audion Q1 and the audion Q2 being connected in parallel, the base stage of described audion Q1 is connected with power vd D through resistance R1, the colelctor electrode of described audion Q1 is connected with power vd D, the base stage of described audion Q1 is connected with the base stage of audion Q2, the emitter stage of described audion Q1 is connected with the emitter stage of audion Q2, the grounded collector of described audion Q2, described water level signal transmits the input of circuit and is connected on the emitter stage of described audion Q1 and the emitter stage junction point of audion Q2.
4. water level detection circuit as claimed in claim 3, it is characterised in that: described first inspection level electrode is connected on the base stage of audion Q1 and the base connection point of audion Q2, described second inspection level electrode ground connection.
5. water level detection circuit as claimed in claim 3, it is characterised in that: it is connected between base stage and the ground of described audion Q2 and has electric capacity C1.
6. the water level detection circuit as described in one of claim 1 ~ 5, it is characterized in that: described water level signal transmits circuit and includes a bleeder circuit, described bleeder circuit is connected with power supply VCC, connect on described bleeder circuit and have switching it on or the optocoupler U1 disconnected, the input of described optocoupler U1 is connected to control on the turning circuit of its break-make, and the filtered circuit of dividing point of described bleeder circuit is connected with microprocessor.
7. water level detection circuit as claimed in claim 6, it is characterised in that: described bleeder circuit is composed in series by resistance R4 and resistance R3, and described resistance R4 is connected with power supply VCC, described resistance R3 ground connection, and described optocoupler U1 is connected between resistance R4 and resistance R3.
8. water level detection circuit as claimed in claim 7, it is characterized in that: described filtered electrical routing resistance R5 and electric capacity C2 is composed in series, described resistance R5 is connected on the junction point of resistance R4 and optocoupler U1, and described electric capacity C2 ground connection, described microprocessor is connected on the junction point of resistance R5 and electric capacity C2.
9. water level detection circuit as claimed in claim 8, it is characterised in that: the input of described optocoupler U1 is through resistance R2 ground connection.
10. an electric cooker, it is characterised in that: include the water level detection circuit described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064941.8U CN205483168U (en) | 2015-12-18 | 2015-12-18 | Water level detection circuit and electric rice cooker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064941.8U CN205483168U (en) | 2015-12-18 | 2015-12-18 | Water level detection circuit and electric rice cooker |
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| CN205483168U true CN205483168U (en) | 2016-08-17 |
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| CN201521064941.8U Active CN205483168U (en) | 2015-12-18 | 2015-12-18 | Water level detection circuit and electric rice cooker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884028A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | For cooking apparatus anti-overflow detection means and there is its cooking apparatus |
| CN113048631A (en) * | 2021-03-29 | 2021-06-29 | 宁波奥克斯电气股份有限公司 | Water level detection circuit and electronic equipment |
| CN113639826A (en) * | 2021-07-20 | 2021-11-12 | 山东大学 | Septic tank liquid level overflow detection device |
-
2015
- 2015-12-18 CN CN201521064941.8U patent/CN205483168U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884028A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | For cooking apparatus anti-overflow detection means and there is its cooking apparatus |
| CN107884028B (en) * | 2016-09-30 | 2021-01-19 | 佛山市顺德区美的电热电器制造有限公司 | A cooking utensil that is used for cooking utensil's anti-overflow detection device and has it |
| CN113048631A (en) * | 2021-03-29 | 2021-06-29 | 宁波奥克斯电气股份有限公司 | Water level detection circuit and electronic equipment |
| CN113639826A (en) * | 2021-07-20 | 2021-11-12 | 山东大学 | Septic tank liquid level overflow detection device |
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