CN202820965U - Boiling water identification circuit and induction cooker tea tray - Google Patents
Boiling water identification circuit and induction cooker tea tray Download PDFInfo
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- CN202820965U CN202820965U CN 201220435750 CN201220435750U CN202820965U CN 202820965 U CN202820965 U CN 202820965U CN 201220435750 CN201220435750 CN 201220435750 CN 201220435750 U CN201220435750 U CN 201220435750U CN 202820965 U CN202820965 U CN 202820965U
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- boiling water
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Abstract
The utility model discloses an induction cooker tea tray. The induction cooker tea tray comprises a boiling water identification circuit. The boiling water identification circuit comprises a piezoelectric effect sensor, an impedance conversion circuit, a first-level amplifying circuit and a second-level amplifying circuit, wherein the piezoelectric effect sensor is provided with two signal output ends, one end is connected with the ground, and the other end is connected with the impedance conversion circuit. The output end of the impedance conversion circuit is connected with the first-level amplifying circuit, and the first-level amplifying circuit comprises a filter circuit. The output end of the first-level amplifying circuit is connected with the second-level amplifying circuit, and the output end of the second-level amplifying circuit is connected with a master control single chip of the induction cooker. The impedance conversion circuit is composed of a sound wave sensitive regulating resistance. According to the boiling water identification circuit, the electrical resistance placed in the circuit of the sound wave sensitive regulating resistance is adjusted through an adjusting knob, the intensity of an electric signal output by the piezoelectric effect sensor is changed, the sensitivity of boiling water identification of the master control single chip of the induction cooker is adjusted, so the boiling water identification can be achieved accurately.
Description
Technical field
The utility model relates to the tea set technical field, particularly a kind of boiling water identification circuit and electromagnetic oven tea tray.
Background technology
The electromagnetic oven thermometric mainly was the glass-ceramic panel that heat is passed to the bottom of a pan by kettle in the past, pass to again the beneath thermistor of glass-ceramic panel, be converted to voltage by bleeder circuit again and send the processing of electromagnetic oven main control singlechip to, because glass-ceramic panel itself is the non-conductor of heat, it is slow to conduct heat, and also has that the glass-ceramic panel variable thickness causes, the temperature of workplace also can affect the thermometric of thermistor.So just can't guarantee that water opens timely identification and allow the electromagnetic oven main control singlechip deal with: as reducing power, stopped heating.
The utility model content
The purpose of this utility model is to overcome the technological deficiency that present electromagnetic oven adopts thermistor temperature detecting, provides a kind of no matter in south, the north or winter, summer, and high height above sea level or low height above sea level can adapt to the boiling water recognition device of various kettles.
The technical solution adopted in the utility model is:
A kind of electromagnetic oven tea tray, comprise disk body, be arranged at disk body one side for water unit, heating unit and boiling water identification circuit, described disk body upper surface has the recessed district of making tea, described heating unit comprises heater circuit, control panel, described boiling water identification circuit comprises piezo-electric effect sensor, impedance inverter circuit, one-level amplifying circuit and second amplifying circuit, wherein: two signal output parts of described piezo-electric effect sensor, an end ground connection, the other end connects impedance inverter circuit; The output of described impedance inverter circuit connects the one-level amplifying circuit; Described one-level amplifying circuit comprises filter circuit; The output of described one-level amplifying circuit connects second amplifying circuit; The output of second amplifying circuit is connected to the electromagnetic oven main control singlechip; Described impedance inverter circuit is made of the sensitive regulating resistance of sound wave.
Further, the sensitive regulating resistance of described sound wave is swept resistance, and its range is 15K.
Further, described high-frequency filter circuit is formed by resistance and Capacitance parallel connection.
Further, described one-level amplifying circuit and second amplifying circuit adopt the LM358D amplifier.
Compared with prior art, the advantage of technical solutions of the utility model is:
Change the resistance sizes of termination translation circuit by regulating the sensitive regulating resistance of sound wave, and then change piezo-electric effect sensor outputs to the signal of amplifying circuit, thereby regulate the sensitivity of electromagnetic oven main control singlechip identification boiling water, so that according to actual conditions, realize the different degree of heating up water requirements.Further, the utility model also provides a kind of electromagnetic oven tea tray, and described electromagnetic oven tea tray is provided with described boiling water identification circuit, accurately identifies to realize the boiling water that reaches different kettles under the various environment, improves the quality of making tea.
Description of drawings
Fig. 1 is the utility model specific embodiment boiling water identification circuit schematic diagram;
Fig. 2 is the described electromagnetic oven tea tray schematic diagram of the utility model specific embodiment.
The specific embodiment
Inventor of the present utility model proposes a kind of technical scheme of solution, specific as follows: a kind of electromagnetic oven tea tray, adopt piezoelectric vibration pickup identification water boiling point, its circuit comprises piezo-electric effect sensor, one-level amplifying circuit and second amplifying circuit, wherein: two signal output parts of described piezo-electric effect sensor, one end ground connection, the other end connects impedance inverter circuit; The output of described impedance inverter circuit connects the one-level amplifying circuit; Described one-level amplifying circuit comprises high-frequency filter circuit; The output of described one-level amplifying circuit connects second amplifying circuit; The output of second amplifying circuit is connected to the electromagnetic oven main control singlechip; Piezo-electric effect sensor input is equipped with the sensitive regulating resistance of sound wave.
The utility model embodiment is by regulating the resistance sizes of the sensitive regulating resistance termination of sound wave translation circuit, change the signal that the piezo-electric effect sensor outputs to amplifying circuit, thereby regulate the sensitivity of electromagnetic oven main control singlechip identification boiling water, so that according to actual conditions, realize the different degree of heating up water requirements.
The described boiling water identification circuit of the utility model embodiment is the principle according to " boiling water do not ring, Xiangshui County does not open ", identifies boiling water in conjunction with piezo-electric effect sensor and amplifying circuit and electromagnetic oven main control singlechip.
As everyone knows, before kettle was filled with water, Hu Bi is upper can to adsorb a layer of air; After adding water, this layer of air has just become countless small bubbles. the buoyancy that is subject to greater than bubble because of absorption affinity, so bubble can't break away from Hu Bi.When water temperature raises, water around the bubble evaporates in bubble, the steam bubble volume is increased, when temperature reaches seven, 80 degrees centigrade, become the buoyancy that large bubble is subject to and surpassed absorption affinity, they just leave Hu Bi and rise one after another, on Hu Bi, still leave over simultaneously the next part air, this part air can increase volume at faster speed and rise. and the cold water of the bubble of rising around running into, the steam in the bubble will liquefy, and bubble is diminished rapidly or break.Because countless bubbles sharply expand at the bottom of kettle, in rising, diminish rapidly again, the water in the kettle just is in fierce vibrational state, and then has caused again the vibration of air, has formed the underwater sound.Because it is very fast that the bubble volume size alternately changes, make the vibration frequency of water high, the tone of the underwater sound is also just high.At last, because everywhere water temperature differs more and more less in the kettle, the bubble volume size alternately changes also more and more slower, and then the tone of the underwater sound that causes step-down gradually just.During boiling, bubble breaks at the water surface, has caused that the water surface significantly seethes, and the air vibration frequency that causes therefrom can not show a candle to the height before the boiling, and the tone of the underwater sound is also just low, the reason of " boiling water is loud, and Xiangshui County does not open " that Here it is proverb is often said.
Under normal circumstances, when water is heated to more than 70 degree, the sound in the kettle will begin to increase, to the sound in the 95 degree left and right sides kettles then begin to reduce.Therefore, we set so program in the electromagnetic oven main control singlechip: the intensity of sound of sending in kettle is reduced to certain value and just judges that water opened.Suppose that we are made as 10 grades with the intensity of sound of sending in the kettle, then draw a collection of kettle intensity of sound in the kettle when water is boiled according to actual measurement and reduce to below 3 grades that program just is set as kettle and sounds intensity during less than 3 grades, judge that water opens.But different water quality differs with different kettles intensity of sound when water is boiled and is decided to be below 3 grades in actual applications, the program of our electromagnetic oven main control singlechip is fixed, the intensity of sound that kettle sent when that just can be opened by water by the sensitive regulating resistance of adjusting sound wave just can realize that by such adjusting boiling water recognition device of the present utility model is suitable for different water quality and different kettles less than 3 grades.
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.
Fig. 1 is the utility model specific embodiment circuit diagram.As shown in Figure 1, a kind of boiling water identification circuit, comprise piezo-electric effect sensor 1, impedance inverter circuit 2, one-level amplifying circuit 4, second amplifying circuit 5, electromagnetic oven main control singlechip 6, two signal output parts of described piezo-electric effect sensor 1, one end ground connection, the other end connects impedance inverter circuit 2; The output of described impedance inverter circuit 2 connects one-level amplifying circuit 4; Described one-level amplifying circuit 4 comprises high-frequency filter circuit 3; The output of described one-level amplifying circuit 4 connects second amplifying circuit 5; The output of second amplifying circuit 5 is connected to the port of sound wave chip 6; Described impedance inverter circuit 2 is made of the sensitive regulating resistance of sound wave.
The sensitive regulating resistance of described sound wave is swept resistance R1, and its range is 15K, namely from zero to 15 kilo-ohms.
Described high-frequency filter circuit 3 is by capacitor C 1 and resistance R 3 in parallel formation, and described resistance R 3 is 220K, namely 220 kilo-ohms; Described capacitor C 1 is 102J, i.e. 1000PF, and error is ± 5%.
Described one-level amplifying circuit 4 is made of operational amplifier A and resistance R 2 and above-mentioned high-frequency filter circuit 3, and described operational amplifier A model is LM358D, and described resistance R 2 is 1K, i.e. 1000 Europe.
Described second amplifying circuit 5 is made of operational amplifier B and resistance R 4, R5 and R6, and wherein the model of operational amplifier B is LM358D, and R4 is 3.3K, and R5 is 10K, and R6 is 10K.
Described 6 is the electromagnetic oven main control singlechip.
The described boiling water identification circuit of the utility model embodiment changes the resistance sizes of termination translation circuit by regulating the sensitive regulating resistance of sound wave, and then change piezo-electric effect sensor outputs to the signal of amplifying circuit, thereby regulate the sensitivity of electromagnetic oven main control singlechip identification boiling water, in order to adapt to the boiling water identification requirement of various room temperatures, different atmospheric pressure environments and different kettles.
Fig. 2 is the electromagnetic oven tea tray schematic diagram of the utility model specific embodiment.As shown in Figure 2, a kind of electromagnetic oven tea tray, comprise disk body 21, be arranged at disk body one side for water unit 22 and heating unit 23, described disk body upper surface has the recessed district 24 of making tea, described heating unit 23 comprises heater circuit (not shown), control panel 231, and described disk body side is provided with adjusting knob 232; Described heater circuit comprises water boiling point identification circuit shown in Figure 1, described adjusting knob 232 corresponding resistance sizes of regulating swept resistance R1 place in circuit among Fig. 1.
The described electromagnetic oven tea tray of the utility model specific embodiment, big or small by the resistance that adjusting knob is regulated in the sensitive regulating resistance place in circuit of sound wave, change the size of piezo-electric effect sensor output electrical signals intensity, regulate the sensitivity of electromagnetic oven main control singlechip identification boiling water, accurately identify to realize boiling water.
Although the utility model with preferred embodiment openly as above; but it is not to limit the utility model; any those skilled in the art are not within breaking away from spirit and scope of the present utility model; can make possible change and modification, therefore protection domain of the present utility model should be as the criterion with the scope that the utility model claim is defined.
Claims (4)
1. electromagnetic oven tea tray, it is characterized in that, comprise disk body, be arranged at disk body one side for water unit, heating unit and boiling water identification circuit, described disk body upper surface has the recessed district of making tea, described heating unit comprises heater circuit, control panel, described boiling water identification circuit comprises piezo-electric effect sensor, impedance inverter circuit, one-level amplifying circuit and second amplifying circuit, wherein:
Two signal output parts of described piezo-electric effect sensor, an end ground connection, the other end connects impedance inverter circuit;
The output of described impedance inverter circuit connects the one-level amplifying circuit;
Described one-level amplifying circuit comprises filter circuit;
The output of described one-level amplifying circuit connects second amplifying circuit;
The output of second amplifying circuit is connected to the electromagnetic oven main control singlechip;
Described impedance inverter circuit is made of the sensitive regulating resistance of sound wave.
2. electromagnetic oven tea tray according to claim 1 is characterized in that, the sensitive regulating resistance of described sound wave is swept resistance, and its range is 15K.
3. electromagnetic oven tea tray according to claim 1 is characterized in that, described high-frequency filter circuit is formed by resistance and Capacitance parallel connection.
4. electromagnetic oven tea tray according to claim 1 is characterized in that, described one-level amplifying circuit and second amplifying circuit adopt the LM358D amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435750 CN202820965U (en) | 2012-08-30 | 2012-08-30 | Boiling water identification circuit and induction cooker tea tray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435750 CN202820965U (en) | 2012-08-30 | 2012-08-30 | Boiling water identification circuit and induction cooker tea tray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202820965U true CN202820965U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220435750 Expired - Fee Related CN202820965U (en) | 2012-08-30 | 2012-08-30 | Boiling water identification circuit and induction cooker tea tray |
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| CN (1) | CN202820965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493661A (en) * | 2020-04-30 | 2020-08-07 | 河海大学常州校区 | System for controlling water cut-off of water dispenser based on tone recognition |
-
2012
- 2012-08-30 CN CN 201220435750 patent/CN202820965U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493661A (en) * | 2020-04-30 | 2020-08-07 | 河海大学常州校区 | System for controlling water cut-off of water dispenser based on tone recognition |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20210830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |