CN203815245U - Control circuit of instant kettle - Google Patents
Control circuit of instant kettle Download PDFInfo
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- CN203815245U CN203815245U CN201420161454.2U CN201420161454U CN203815245U CN 203815245 U CN203815245 U CN 203815245U CN 201420161454 U CN201420161454 U CN 201420161454U CN 203815245 U CN203815245 U CN 203815245U
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Abstract
The utility model discloses a control circuit of an instant kettle, which comprises an input module, a display module, a core control circuit module, a temperature detection module, a water inlet, a heating tank, a silicon controlled zero-cross detection and phase shift trigger circuit and a water outlet, wherein the water inlet comprises a water suction pump and a first thermistor; the heating tank comprises a heating pump and a second thermistor; and the water outlet comprises a third thermistor. With the arrangement of the thermistors, the temperature of a corresponding mechanism can be detected, and simultaneously, a temperature value is displayed outside through the input module and the display module; and besides, the silicon controlled zero-cross detection and phase shift trigger circuit is introduced, so that the instant kettle can effectively and accurately control power of the heating pump and the water suction pump under different grid frequency by adjusting the frequency of a PWM (pulse-width modulation) signal, the outlet water temperature set by a user is rapidly output and displayed in real time, and the environmental adaptability of a system is enhanced.
Description
Technical field
The utility model relates to instantaneous heating water jug research field, particularly a kind of Instant heating type kettle control circuit.
Background technology
Along with social progress, the development of technical merit, people improve constantly the requirement of hot-water bottle, and demand is more and more diversified.Traditional hot-water bottle only has hot water completely boiled, just can obtain hot water, and not only hot water temperature cannot arrange, and needs to wait for the longer time.In addition, when by the time will going to drink one glass, the water in kettle may cool down, thus again boiled again, so not only caused the waste of the energy, and it is harmful to health to drink repeatedly boiled water.
Although there are many Instant heating type kettles on market now, but it is waited for that water discharging time is long or can only add a small amount of hot water of heat fixation at every turn, because the thermal inertia of system causes leaving water temperature error large, can not meet people's needs a large amount of and can uninterruptedly export, the demand of hot water that temperature control precision is high.
Core control circuit module at present existing Instant heating type kettle adopts pulsewidth modulation (PWM) control method to carry out temperature controlled technology, but due to the passing zero trigger characteristic of bidirectional triode thyristor, if use merely pwm signal to regulate the silicon controlled angle of flow very likely to occur that pwm signal cause SCR control asynchronous with civil power lost efficacy, greatly reduce and control effect, so must use a zero cross detection circuit, detect the zero crossing of civil power, in the time zero crossing being detected, again pwm signal is carried out phase shift output and then controls controllable silicon, the phase place of pwm signal is along with its dutycycle changes and changes.Traditional controllable silicon carries out phase shift with capacitance-resistance phase-shifting unit to pwm control signal, and its phase shift angle is fixed, and can not meet the requirement of pwm signal phase place along with its change in duty cycle.In addition the frequency of pwm signal will be with civil power (as Chinese 220V/50Hz, U.S. 110V/60Hz) frequency unanimously just can reach good effect, because the frequency of electrical network is not stable 50Hz, and the grid alternating current frequency of country variant different (as U.S. mains frequency 60Hz), easily cause the frequency of civil power and pwm signal different.Therefore the Instant heating type kettle of existing employing conventional P WM control method can't be applicable to different pwm control signals and different power grid environments.
Utility model content
Main purpose of the present utility model is that the shortcoming that overcomes prior art is with not enough, a kind of Instant heating type kettle control circuit is provided, this circuit can allow user input the temperature of its water needing, simultaneously at water inlet, heating tank, delivery port is all provided with thermistor, can make user know intuitively the temperature of current delivery port water outlet, make structure hommization more, adopt silicon control zero-cross to detect the validity of having guaranteed the power control of heat pump and suction pump with phase-shift trigger circuit simultaneously, strengthened Instant heating type kettle to different pwm control signals and different power grid environment adaptive capacitys.
The purpose of this utility model realizes by following technical scheme: Instant heating type kettle control circuit, comprising: for user set the input module of leaving water temperature, for showing in real time display module, core control circuit module, temperature detecting module, water inlet, heating tank, silicon control zero-cross detection and phase-shift trigger circuit and the delivery port of current leaving water temperature; Described water inlet comprises suction pump and the first thermistor, heating tank comprises heat pump and the second thermistor, delivery port comprises the 3rd thermistor, the first thermistor, the second thermistor, the 3rd thermistor are connected with temperature detecting module respectively, suction pump is used to heating tank to supply water, and heat pump is for heating the water in heating tank; Silicon control zero-cross detects the pwm signal that is used for receiving core control circuit module with phase-shift trigger circuit, and the frequency of adjusting pwm signal makes it consistent with current mains frequency, then control signal is sent to suction pump and heat pump; Silicon control zero-cross detection is connected with core control circuit module respectively with phase-shift trigger circuit, temperature detecting module, input module, display module.
Preferably, described silicon control zero-cross detects with phase-shift trigger circuit and comprises full-wave rectifying circuit, comparison circuit and silicon controlled control circuit, described full-wave rectifying circuit comprises a full-wave rectification bridge, for the alternating voltage of electrical network is carried out obtaining full wave rectified signal after full-wave rectification; Described comparison circuit comprises the first Zener diode, the second Zener diode and an integrated operational amplifier, for full wave rectified signal being processed into the square-wave signal identical with its frequency; Described silicon controlled control circuit comprises single-chip microcomputer, the first controllable silicon and the second controllable silicon, single-chip microcomputer input is connected with core control circuit module output with comparison circuit output respectively, for exporting consistent with current mains frequency the first controllable silicon and the second controllable silicon of controlling signal to, the first controllable silicon is connected with suction pump with heat pump respectively with the second controllable silicon output.
Preferably, the input element of described input module is button.
Preferably, the display element of described display module is charactron.
Preferably, the rated power of described suction pump is 1000W, and power when its real work is detected and phase-shift trigger circuit control by core control circuit module and silicon control zero-cross.
Preferably, the rated power of described heat pump is 2000W, and power when its real work is detected and phase-shift trigger circuit control by core control circuit module and silicon control zero-cross.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, in the utility model device, being provided with one sets the input module of leaving water temperature and for showing in real time the display module of current leaving water temperature, makes device hommization more for user.
2, in the utility model device, in water inlet, heating tank, delivery port, be all provided with thermistor, for detection of entering hot water temperature, leaving water temperature in coolant-temperature gage, heating tank, so that core control circuit module is adjusted the power of suction pump and heat pump according to temperature.
3, the utility model is provided with silicon control zero-cross detection and phase-shift trigger circuit after core control circuit module, this circuit can have been guaranteed the validity of the power control of heat pump and suction pump, has strengthened the adaptive capacity of Instant heating type kettle to different power grid environments.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is to be system control principle schematic diagram of the present invention;
Fig. 3 is that in the utility model device, silicon control zero-cross detects and phase-shift trigger circuit figure;
Fig. 4 (a) is the oscillogram that in Fig. 3, A is ordered;
Fig. 4 (b) is the oscillogram of pwm control signal in Fig. 3;
Fig. 4 (c) is the oscillogram that in Fig. 3, B is ordered;
Fig. 4 (d) is the oscillogram of comparator circuit output square-wave voltage in Fig. 3;
Fig. 4 (e) is the oscillogram of single-chip microcomputer output in Fig. 3;
Fig. 4 (f) is the oscillogram of controllable silicon output signal in Fig. 3.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment 1
As shown in Figure 1, the Instant heating type kettle control circuit of the present embodiment, comprises input module, display module, silicon control zero-cross detection and phase-shift trigger circuit, core control circuit module, temperature detecting module, water inlet and embedded suction pump and the first thermistor, heating tank and embedded heat pump and the second thermistor, delivery port and the 3rd embedded thermistor.The first thermistor, the second thermistor, the 3rd thermistor are connected with temperature detecting module respectively, silicon control zero-cross detection is connected with core control circuit module respectively with phase-shift trigger circuit, temperature detecting module, input module, display module, and silicon control zero-cross detects and is connected with core control circuit module, heat pump and suction pump respectively with phase-shift trigger circuit.
The course of work below in conjunction with Fig. 2 simple declaration the present embodiment: user sets leaving water temperature by input module shown in Fig. 1, sends into core control circuit module; Temperature detecting module shown in Fig. 1 is detected hot water temperature and the leaving water temperature in coolant-temperature gage, heating tank, and detected temperature parameter is sent into core control circuit module by the first thermistor shown in Fig. 1, the second thermistor, the 3rd thermistor timing simultaneously; Core control circuit module is according to design temperature and enter the difference of coolant-temperature gage, again according to the water temperature in heating tank, output water temperature output pwm control signal, detect by silicon control zero-cross the heating power that regulates in real time draw water power and the heat pump of suction pump with phase-shift trigger circuit again, control rapidly leaving water temperature, make it approach set water temperature.In the time that user does not need hot water, system closing, core control circuit module controls heat pump stops heating, and suction pump stops supplying water.
As shown in Figure 3, the present embodiment silicon control zero-cross detects with phase-shift trigger circuit and comprises full-wave rectifying circuit, comparison circuit and silicon controlled control circuit, described full-wave rectifying circuit is made up of resistance R 1, resistance R 2, full-wave rectification bridge D1, described comparison circuit is made up of resistance R 3, resistance R 4, resistance R 5, Zener diode D2, Zener diode D3, integrated operational amplifier U1A, and described silicon controlled control circuit is made up of single-chip microcomputer, controllable silicon T1, controllable silicon T2, resistance R 6, resistance R 7, capacitor C 1, capacitor C 2.Its operation principle is: alternating voltage obtains full wave rectified signal after full-wave rectification, full wave rectified signal is exported the square-wave signal identical with full wave rectified signal frequency after comparator, and be input to single-chip microcomputer, single-chip microcomputer receives the square-wave signal of reaction ac frequency and the pwm signal of core control circuit module output simultaneously, regulate the frequency of pwm signal, export control signal control bidirectional triode thyristor conducting and the cut-off consistent with current mains frequency, thereby guarantee that the power control of heat pump and suction pump synchronizes with mains frequency.
Below by an example, and in conjunction with Fig. 3 and Fig. 4 (a)-(f) further illustrate course of work of self-adapted to silicon-controlled zero passage detection and phase-shift trigger circuit:
1, in Fig. 3, A point voltage is alternating current 220V/50Hz or 110V/50Hz or 110V/60Hz, and waveform is as shown in VA curve of output in Fig. 4 (a), and establishing VA is herein 110V/60Hz.
2, in Fig. 3, PWM1 or PWM2 are the pwm control signal that core control circuit module is sent, and waveform is as shown in PWM_in curve of output in Fig. 4 (b), and its frequency is different from VA, and establishing PWM_in signal frequency is 500Hz, and dutycycle is 40%.
3, in Fig. 3, B point voltage is the voltage that VA exports through the full-wave rectifying circuit rectification being made up of resistance R 1, R2 and full-wave rectification bridge D1, and waveform is as shown in VB curve of output in Fig. 4 (c), and its frequency is 120Hz.
4, the square-wave voltage of exporting after comparator circuit in Fig. 3, as VC in Fig. 4 (d), shown in, its frequency is 120Hz.
5, single-chip microcomputer is sampled to the width of square wave VC, draws the width TC of square wave VC, and the width of TC is the width of VA half-wave.And gathering VC rising edge, this rising edge signal is VC zero cross signal.
6, single-chip microcomputer gathers PWM_in signal, draws its frequency and dutycycle (500Hz, 40%), and then single-chip microcomputer is adjusted its frequency, makes it consistent with square wave VC frequency, is 120Hz, and dutycycle is constant.In the time that VC zero cross signal arrives, single-chip microcomputer to the PWM_in signal lag phase shift after adjusting after D or E place output in Fig. 3, as shown in its waveform PWM_out as middle in Fig. 4 (e), PWM_out frequency is 120Hz, dutycycle is still 40%, and with square wave VC Right Aligns.
7, PWM_out is as control signal control silicon controlled conducting or the cut-off of bidirectional triode thyristor T1 or T2, and last controllable silicon output signal is as shown in Vout in Fig. 4 (f), and solid line part is silicon controlled ON time.ON time accounts for 40% of half band-width, and silicon controlled output connects respectively heat pump and suction pump.
Above-described embodiment is preferably embodiment of the utility model; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (6)
1. Instant heating type kettle control circuit, it is characterized in that, comprising: for user set the input module of leaving water temperature, for showing in real time display module, core control circuit module, temperature detecting module, water inlet, heating tank, silicon control zero-cross detection and phase-shift trigger circuit and the delivery port of current leaving water temperature; Described water inlet comprises suction pump and the first thermistor, heating tank comprises heat pump and the second thermistor, delivery port comprises the 3rd thermistor, the first thermistor, the second thermistor, the 3rd thermistor are connected with temperature detecting module respectively, suction pump is used to heating tank to supply water, and heat pump is for heating the water in heating tank; Silicon control zero-cross detects the pwm signal that is used for receiving core control circuit module with phase-shift trigger circuit, and the frequency of adjusting pwm signal makes it consistent with current mains frequency, then control signal is sent to suction pump and heat pump; Silicon control zero-cross detection is connected with core control circuit module respectively with phase-shift trigger circuit, temperature detecting module, input module, display module.
2. Instant heating type kettle control circuit according to claim 1, is characterized in that, the input element of described input module is button.
3. Instant heating type kettle control circuit according to claim 1, is characterized in that, the display element of described display module is charactron.
4. Instant heating type kettle control circuit according to claim 1, is characterized in that, the rated power of described suction pump is 1000W, and power when its real work is detected and phase-shift trigger circuit control by core control circuit module and silicon control zero-cross.
5. Instant heating type kettle control circuit according to claim 1, is characterized in that, the rated power of described heat pump is 2000W, and power when its real work is detected and phase-shift trigger circuit control by core control circuit module and silicon control zero-cross.
6. Instant heating type kettle control circuit according to claim 1, it is characterized in that, described silicon control zero-cross detects with phase-shift trigger circuit and comprises full-wave rectifying circuit, comparison circuit and silicon controlled control circuit, described full-wave rectifying circuit comprises a full-wave rectification bridge, for the alternating voltage of electrical network is carried out obtaining full wave rectified signal after full-wave rectification; Described comparison circuit comprises the first Zener diode, the second Zener diode and an integrated operational amplifier, for full wave rectified signal being processed into the square-wave signal identical with its frequency; Described silicon controlled control circuit comprises single-chip microcomputer, the first controllable silicon and the second controllable silicon, single-chip microcomputer input is connected with core control circuit module output with comparison circuit output respectively, for exporting consistent with current mains frequency the first controllable silicon and the second controllable silicon of controlling signal to, the first controllable silicon is connected with suction pump with heat pump respectively with the second controllable silicon output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161454.2U CN203815245U (en) | 2014-04-03 | 2014-04-03 | Control circuit of instant kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420161454.2U CN203815245U (en) | 2014-04-03 | 2014-04-03 | Control circuit of instant kettle |
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| CN203815245U true CN203815245U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420161454.2U Expired - Fee Related CN203815245U (en) | 2014-04-03 | 2014-04-03 | Control circuit of instant kettle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314795A (en) * | 2014-10-14 | 2015-01-28 | 台州韩进泵业有限公司 | Pump control device, constant-pressure speed regulating control device and method, micro-pump and water pump |
| CN110250908A (en) * | 2019-07-18 | 2019-09-20 | 金华瑞豪科技发展有限公司 | A kind of Intelligent electric heating kettle |
| CN110618714A (en) * | 2019-09-30 | 2019-12-27 | 小熊电器股份有限公司 | Rapid heating control method and device and instant heating type heating equipment |
| CN110811321A (en) * | 2019-11-28 | 2020-02-21 | 李良杰 | Water purifying temperature control electric kettle |
| CN111134521A (en) * | 2018-11-06 | 2020-05-12 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method, heating control device, medium and liquid heating container |
-
2014
- 2014-04-03 CN CN201420161454.2U patent/CN203815245U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314795A (en) * | 2014-10-14 | 2015-01-28 | 台州韩进泵业有限公司 | Pump control device, constant-pressure speed regulating control device and method, micro-pump and water pump |
| CN111134521A (en) * | 2018-11-06 | 2020-05-12 | 佛山市顺德区美的电热电器制造有限公司 | Heating control method, heating control device, medium and liquid heating container |
| CN110250908A (en) * | 2019-07-18 | 2019-09-20 | 金华瑞豪科技发展有限公司 | A kind of Intelligent electric heating kettle |
| CN110618714A (en) * | 2019-09-30 | 2019-12-27 | 小熊电器股份有限公司 | Rapid heating control method and device and instant heating type heating equipment |
| CN110811321A (en) * | 2019-11-28 | 2020-02-21 | 李良杰 | Water purifying temperature control electric kettle |
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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: 20140910 Termination date: 20170403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |