CN201196747Y - Thermostatic control device of electric water heater - Google Patents
Thermostatic control device of electric water heater Download PDFInfo
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- CN201196747Y CN201196747Y CNU2008200589162U CN200820058916U CN201196747Y CN 201196747 Y CN201196747 Y CN 201196747Y CN U2008200589162 U CNU2008200589162 U CN U2008200589162U CN 200820058916 U CN200820058916 U CN 200820058916U CN 201196747 Y CN201196747 Y CN 201196747Y
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- microprocessor
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Abstract
The utility model discloses a thermostatic control device for electric water heaters, which comprises an influent/effluent temperature sensor, an influent flow sensor, a microprocessor, a pulse width modulator for receiving microprocessor signals, as well as a power control component. The signals of the influent/effluent temperature sensor and the influent flow sensor are input to the microprocessor; the heating power of the power control component is controlled by the output signals of the pulse width modulator; the microprocessor carries out operation processing to influent temperature, influent flow and effluent temperature and then outputs signals to the pulse width modulator; and the pulse width modulator outputs pulses with a certain duty ratio to control the heating power of the power control component, so as to precisely control the effluent temperature of an electric water heater and realize the constant of the effluent temperature of the electric water heater. Meanwhile, due to the precise operation processing of the microprocessor for acquired data, as well as the control of the pulse width modulator on the heating power, the effluent temperature of the electric water heater can not be too cold or too hot, which saves electric energy as well, namely the corresponding electric energy is provided according to the needed heat of effluent water.
Description
Technical field
The utility model relates to the temperature control equipment of electric heater, relates in particular to a kind of thermostatically-controlled equipment of electric heater.
Background technology
Instant electric water heater's temperature control at present adopts gear to regulate the power of electric heater heating usually, because gear control can not accomplish accurately to control the water outlet water temperature, make the leaving water temperature deviation bigger, the sometimes hot and sometimes cold phenomenon of water outlet appears, and traditional step positioning type control heating power, can only save the power adjustments of the formula of jumping, externally under the situation that other environmental parameter such as discharge changes, can not regulate the size of heating power so that effluent temperature constancy by intelligent stepless, the difficult control of water temperature in use, be not too cold be exactly too hot, certain electric energy has also been wasted in the normal use that has so promptly influenced electric heater.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of convenient water temperature of regulating, and makes the electric heater thermostatically-controlled equipment of effluent temperature constancy and saves energy.
For solving the problems of the technologies described above, the utility model electric heater thermostatically-controlled equipment comprises the pulse width modulator and the power control unit of leaving water temperature sensor, microprocessor, the described microprocessor signals of acceptance, the signal of described leaving water temperature sensor is imported described microprocessor, the output signal of described pulse width modulator is controlled the heating power of described power control unit, it also comprises inflow temperature sensor and flow of inlet water sensor, and the signal of described inflow temperature sensor and flow of inlet water sensor is imported described microprocessor;
Above-mentioned microprocessor is accepted the feedback signal of the signal and the leaving water temperature sensor of described inflow temperature sensor, flow of inlet water sensor, the signal of the described pulse width modulator of output control after calculation process;
Above-mentioned pulse width modulator is by described microprocessor control signal, and the heating power of described power control unit is controlled in the pulse of exporting certain dutycycle.
Because the utility model electric heater thermostatically-controlled equipment has adopted technique scheme, be to have added inflow temperature sensor and flow of inlet water sensor in the control system of electric heater and with its signal input microprocessor, microprocessor outputs signal to pulse width modulator after with inflow temperature, flow of inlet water and leaving water temperature calculation process, the pulse of exporting certain dutycycle by pulse width modulator comes the heating power of power controlling control assembly, so accurately the leaving water temperature of control electric heater is realized the constant of electric heater leaving water temperature; Simultaneously since by microprocessor to the control of the accurate calculation process of water-in and water-out temperature and flow of inlet water and pulse width modulator to heating power, make the leaving water temperature of electric heater can not cross cold or overheated, equally also saved electric energy, how many electric energy need that promptly how much heat water outlet is added just provides.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the schematic block circuit diagram of the utility model electric heater thermostatically-controlled equipment.
Embodiment
As shown in Figure 1, the utility model electric heater thermostatically-controlled equipment comprises the pulse width modulator 2 and the power control unit 3 of leaving water temperature sensor 6, microprocessor, described microprocessor 1 signal of acceptance, the signal of described leaving water temperature sensor 6 is imported described microprocessor 1, the output signal of described pulse width modulator 2 is controlled the heating power of described power control unit 3, it also comprises inflow temperature sensor 4 and flow of inlet water sensor 5, and the signal of described inflow temperature sensor 4 and flow of inlet water sensor 5 is imported described microprocessor 1;
Above-mentioned microprocessor 1 is accepted described inflow temperature sensor 4, the signal of flow of inlet water sensor 5 and the feedback signal of leaving water temperature sensor 6, the signal of the described pulse width modulator 2 of output control after calculation process;
Above-mentioned pulse width modulator 2 is by the control signal of described microprocessor 1, and the heating power of described power control unit 3 is controlled in the pulse of exporting certain dutycycle.
This electric heater adopts the RGM heating technique, and cold water enters calandria, and water outlet can reach requirement; This device adopts microprocessor control, has adopted control technologys such as PID, fuzzy, pulse-width regulated in the control method;
This device utilizes inflow temperature sensor 4, flow of inlet water sensor 6 to detect parameters such as inflow temperature and flow, and input microprocessor 1, microprocessor 1 carries out computing according to these external parameters, can judge by these parameters and to give the much power of load, according to this judgement, control pulse width modulator 2 changes the dutycycle of pulsewidth, and the size of heating power is controlled in the duty pulse of different inflow temperatures, flow of inlet water generation different in width;
Described microprocessor 1 carries out computing by following basic mathematical relation
If flow Q unit for rise/minute, temperature T unit is ℃, power P unit is KW, the time, H unit was a hour H, temperature variation is Δ T=Tout-Tin
1 ℃ of required electric weight=4200J=4200/3600000 degree=7/6000KWH of every premium on currency rising
Q*ΔT＝(P/60)/(7/6000)＝(100/7)*P
ΔT＝(100/7)*P/Q
P＝(7/100)*Q*ΔT
For example, when flow Q=4 liter/minute, during general power P=8KW, Δ T=28.6 ℃
Be to improve control accuracy, increase the closed loop control function, the signal that promptly utilizes leaving water temperature sensor 6 to produce comes further the water temperature fine tuning, pulse duty cycle is further adjusted to make leaving water temperature more reach the purpose of constant temperature near design temperature exactly.It is same because external cause makes voltage fluctuation, the discharge variation also can cause leaving water temperature to fluctuate thereupon, thereby do not reach desirable constant temperature effect, therefore introduced fuzzy control technology, it can judge the variation of these parameters as early as possible, in time adjust the precision of pulsewidth, make the temperature departure minimum, improve the constant temperature precision;
Described fuzzy control is earlier the magnitude range of pulse width modulator dutycycle to be carried out coarse adjustment at the judgement of flow of inlet water and inflow temperature value, carries out fine tuning with PID then.Such as: when flow of inlet water is lower than 2L/min is that pulse width modulator is operated in the low duty ratio output area, dutycycle output area during pulse width modulator is operated in during less than 4L/min greater than 2L/min, pulse width modulator is operated in the high duty ratio output area during greater than 4L/min, in like manner, when being lower than 10 pulse width modulators when spending, inflow temperature is operated in high duty output area, be operated in middle dutycycle output area greater than 10 degree less than 30 degree pulse width modulators, be operated in the low duty ratio output area greater than 30 degree pulse width modulators, small temperature deviation is used the PID feedback regulation again.
These controls all are to be finished by the software program in microprocessor control, owing to adopted microprocessor Programme-control makes that circuit is more succinct, better effects if, effect be than higher.
Claims (3)
1. electric heater thermostatically-controlled equipment, the pulse width modulator and the power control unit that comprise leaving water temperature sensor, microprocessor, the described microprocessor signals of acceptance, the signal of described leaving water temperature sensor is imported described microprocessor, the output signal of described pulse width modulator is controlled the heating power of described power control unit, it is characterized in that: it also comprises inflow temperature sensor and flow of inlet water sensor, and the signal of described inflow temperature sensor and flow of inlet water sensor is imported described microprocessor.
2. electric heater thermostatically-controlled equipment according to claim 1, it is characterized in that: described microprocessor is accepted the feedback signal of the signal and the leaving water temperature sensor of described inflow temperature sensor, flow of inlet water sensor, the signal of the described pulse width modulator of output control after calculation process.
3. electric heater thermostatically-controlled equipment according to claim 2 is characterized in that: described pulse width modulator is by described microprocessor control signal, and the heating power of described power control unit is controlled in the pulse of exporting certain dutycycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200589162U CN201196747Y (en) | 2008-05-23 | 2008-05-23 | Thermostatic control device of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200589162U CN201196747Y (en) | 2008-05-23 | 2008-05-23 | Thermostatic control device of electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196747Y true CN201196747Y (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200589162U Expired - Fee Related CN201196747Y (en) | 2008-05-23 | 2008-05-23 | Thermostatic control device of electric water heater |
Country Status (1)
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| CN (1) | CN201196747Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410636A (en) * | 2011-12-12 | 2012-04-11 | 莆田市清华园电器发展有限公司 | Instant constant-temperature electric water heater |
| CN102818371A (en) * | 2012-08-13 | 2012-12-12 | 四川长虹电器股份有限公司 | Constant temperature system of water heater and control method |
| CN102818372A (en) * | 2012-08-31 | 2012-12-12 | 江苏天舒电器有限公司 | Temperature control device and temperature control method for yielding water of single-heat type heat pump water heater |
| CN103472874A (en) * | 2013-09-16 | 2013-12-25 | 东莞市唯成节能科技有限公司 | Instant heating type water temperature adjustment method and device |
| CN103954034A (en) * | 2014-05-20 | 2014-07-30 | 国家电网公司 | Constant-temperature electric water heater |
| CN103948310A (en) * | 2014-04-03 | 2014-07-30 | 华南理工大学 | PID (Proportion Integration Differentiation) algorithm-based instant heating type kettle control circuit and control method |
| CN104825052A (en) * | 2014-08-20 | 2015-08-12 | 江丽 | Temperature-adjustable intelligent heater and control method therefor |
| CN106052137A (en) * | 2016-05-27 | 2016-10-26 | 珠海格力电器股份有限公司 | Gas-fired hot water equipment and constant temperature control method and device |
| CN108151324A (en) * | 2017-12-15 | 2018-06-12 | 电子科技大学中山学院 | Control method of instant water heater |
| CN109282486A (en) * | 2017-07-21 | 2019-01-29 | 东元电机股份有限公司 | Preheat pipe-line system and its control method |
| CN109595787A (en) * | 2019-01-14 | 2019-04-09 | 广东盈科电子有限公司 | A kind of automatic adjustment controlling means of the Thermostatic water heaters that temperature drift is calibrated automatically and the Thermostatic water heaters |
| CN113050725A (en) * | 2021-03-30 | 2021-06-29 | 东莞市迈沃科技发展有限公司 | Temperature control method of temperature control device for flowing liquid |
| CN113443668A (en) * | 2021-06-08 | 2021-09-28 | 广东栗子科技有限公司 | Control method and medium for preventing steam injection during instant heating and water purifier |
| US11325400B2 (en) | 2018-07-13 | 2022-05-10 | Hewlett-Packard Development Company, L.P. | Control of a heated system temperature |
| CN115289691A (en) * | 2022-08-04 | 2022-11-04 | 珠海格力电器股份有限公司 | Combustion control method and device for gas water heater, gas water heater and storage medium |
-
2008
- 2008-05-23 CN CNU2008200589162U patent/CN201196747Y/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410636A (en) * | 2011-12-12 | 2012-04-11 | 莆田市清华园电器发展有限公司 | Instant constant-temperature electric water heater |
| CN102410636B (en) * | 2011-12-12 | 2014-09-03 | 莆田市清华园电器发展有限公司 | Instant constant-temperature electric water heater |
| CN102818371B (en) * | 2012-08-13 | 2016-02-10 | 四川长虹电器股份有限公司 | The constant temperature system of water heater and control method |
| CN102818371A (en) * | 2012-08-13 | 2012-12-12 | 四川长虹电器股份有限公司 | Constant temperature system of water heater and control method |
| CN102818372A (en) * | 2012-08-31 | 2012-12-12 | 江苏天舒电器有限公司 | Temperature control device and temperature control method for yielding water of single-heat type heat pump water heater |
| CN102818372B (en) * | 2012-08-31 | 2014-10-22 | 江苏天舒电器有限公司 | Temperature control device and temperature control method for yielding water of single-heat type heat pump water heater |
| CN103472874A (en) * | 2013-09-16 | 2013-12-25 | 东莞市唯成节能科技有限公司 | Instant heating type water temperature adjustment method and device |
| CN103472874B (en) * | 2013-09-16 | 2016-11-02 | 东莞市唯成节能科技有限公司 | A kind of Instant heating type type water temperature adjustment method and device thereof |
| CN103948310A (en) * | 2014-04-03 | 2014-07-30 | 华南理工大学 | PID (Proportion Integration Differentiation) algorithm-based instant heating type kettle control circuit and control method |
| CN103948310B (en) * | 2014-04-03 | 2016-01-06 | 华南理工大学 | Based on Instant heating type kettle control circuit and the control method of pid algorithm |
| CN103954034A (en) * | 2014-05-20 | 2014-07-30 | 国家电网公司 | Constant-temperature electric water heater |
| CN104825052A (en) * | 2014-08-20 | 2015-08-12 | 江丽 | Temperature-adjustable intelligent heater and control method therefor |
| CN106052137A (en) * | 2016-05-27 | 2016-10-26 | 珠海格力电器股份有限公司 | Gas-fired hot water equipment and constant temperature control method and device |
| CN109282486A (en) * | 2017-07-21 | 2019-01-29 | 东元电机股份有限公司 | Preheat pipe-line system and its control method |
| CN108151324A (en) * | 2017-12-15 | 2018-06-12 | 电子科技大学中山学院 | Control method of instant water heater |
| US11325400B2 (en) | 2018-07-13 | 2022-05-10 | Hewlett-Packard Development Company, L.P. | Control of a heated system temperature |
| CN109595787A (en) * | 2019-01-14 | 2019-04-09 | 广东盈科电子有限公司 | A kind of automatic adjustment controlling means of the Thermostatic water heaters that temperature drift is calibrated automatically and the Thermostatic water heaters |
| CN113050725A (en) * | 2021-03-30 | 2021-06-29 | 东莞市迈沃科技发展有限公司 | Temperature control method of temperature control device for flowing liquid |
| CN113443668A (en) * | 2021-06-08 | 2021-09-28 | 广东栗子科技有限公司 | Control method and medium for preventing steam injection during instant heating and water purifier |
| CN113443668B (en) * | 2021-06-08 | 2023-03-14 | 广东栗子科技有限公司 | Control method and medium for preventing steam injection during instant heating and water purifier |
| CN115289691A (en) * | 2022-08-04 | 2022-11-04 | 珠海格力电器股份有限公司 | Combustion control method and device for gas water heater, gas water heater and storage medium |
| CN115289691B (en) * | 2022-08-04 | 2024-05-24 | 珠海格力电器股份有限公司 | Combustion control method and device for gas water heater, gas water heater and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20110523 |