CN105737388A - Temperature controller used for gas water heater and based on single chip microcomputer - Google Patents
Temperature controller used for gas water heater and based on single chip microcomputer Download PDFInfo
- Publication number
- CN105737388A CN105737388A CN201410752239.4A CN201410752239A CN105737388A CN 105737388 A CN105737388 A CN 105737388A CN 201410752239 A CN201410752239 A CN 201410752239A CN 105737388 A CN105737388 A CN 105737388A
- Authority
- CN
- China
- Prior art keywords
- circuit
- temperature
- chip microcomputer
- signal
- designed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Temperature (AREA)
Abstract
The invention provides an automatic water temperature adjusting system used for a gas water heater and based on control of a single chip microcomputer, that is, through an indoor controller, a preset temperature is input, and the preset temperature is reached automatically and rapidly through an execution mechanism. A system hardware part is designed in terms of a core processor, peripheral circuits and peripheral equipment. The 89S51 series single chip microcomputer produced by ATMEL Corporation is selected as the core processor. The peripheral circuits are designed as the necessary power circuit, the necessary reset circuit and the like. The peripheral equipment is provided with multiple parts including a keyboard input circuit, a nixie tube display circuit, a temperature sampling circuit, an outer watchdog circuit, a buzzer warning circuit and a stepping motor driving circuit. According to the system, an analog quantity to digital quantity input (the temperature of a water outlet of the water heater) is designed; three on-off inputs (a temperature-plus-one signal, a temperature-minus-one signal and a determination input signal) are designed; the nixie tube display part achieves two-digit decimal system digital display, and the display range is 0-99 degrees.
Description
Technical field
The present invention relates to a kind of temperature control system, particularly to a kind of temperature control system being applied on gas heater.
Background technology
The temperature of gas heater product controls substantially to take two schemes in the market: mechanical knob formula: the temperature of water heater is regulated and realized by mechanical knob, has fire adjustment knob and runoff investigation knob co-controlling.When fire adjustment knob is turned down by mark, hot water temperature reduces；When tuning up, hot water temperature raises.When runoff investigation knob is turned down by mark, discharge reduces, and hot water temperature raises；When tuning up, discharge increases, and hot water temperature reduces.User can regulate suitable hot water temperature's (recommending shower temperature range is 38 DEG C～42 DEG C) bathing.Digital: under this mode, the adjustment of water temperature is by digital control realization, and when needs leaving water temperature raises, then microcomputerized control proportioning valve is opened greatly, and gaseous-pressure raises, and water temperature raises；Otherwise, then proportioning valve leaves little, and water temperature reduces.
In real life, it has been found that in most of, low grade products all adopt mechanical knob formula scheme, and the main flow in these products exactly formula market.But, this type of water heater there is also many places not fully up to expectations, because such gas heater uses coal gas and oxygen to carry out burning and produces heat, need to be arranged on the place that outdoor ventilation is good, otherwise oxygen deficiency can cause coal gas imperfect combustion to produce the carbon monoxide life to people and constitute a threat to, and to the control and regulation of water heater all on body, so that needing during bathing to regulate water temperature in advance, sometimes run into hydraulic pressure abnormal result in water temperature float indefinite, bather is made out to regulate water temperature again, so not only waste water and combustion gas, and bring very big inconvenience to bather.
Summary of the invention
It is an object of the invention to provide a kind of based on monolithic processor controlled gas heater water temperature automatic regulating system, namely by indoor controller, input predetermined temperature, actuator automatically rapidly adjust predetermined temperature, to solve the problems referred to above.
The object of the present invention is achieved like this:
The hardware of the present invention is designed by core processor, peripheral circuit and external equipment three part.Core processor selects the 89S51 series monolithic that atmel corp produces, the power circuit that periphery circuit design is necessary, reset circuit etc..External equipment is divided into several part to be designed: input through keyboard circuit, digital pipe display circuit, temperature sampling circuit, outer watchdog circuit and buzzer alarm circuit, stepper motor driving circuit.System devises a road analog quantity and turns digital quantity input (water outlet of water heater mouth temperature)；Three On-off signal (temperature adds a signal, the temperature signal that subtracts, determine input signal)；Numeral method part is by two 10 system digital-scroll technique, and indication range is 0～99 degree.
Input through keyboard circuit: 3 singly-bounds (add, subtract, it is determined that).Can be designed with three in the five of single-chip microcomputer interrupt source, it is also possible to be designed with interrupt expansion.Owing to single-chip microcomputer pin is limited, the design initial stage can't determine whether additional resource for, also has the efficiency that the promptness considering keyboard response and single-chip microcomputer run, so native system adopts interrupt expansion control mode, namely three singly-bounds are first connected with three I/O mouths respectively, are then connected to single-chip microcomputer external interrupt 0 interface again through with door.
Temperature sampling circuit: adopt temperature sensor platinum resistance Pt1000.The physical and chemical performance of platinum resistance thermometer sensor, is very stable in high temperature and Oxidant, and it can serve as industry temperature element, and this element linear is better.When 0 100 degrees Celsius, signal, less than 0.5 degree Celsius, is amplified by operational amplifier, then inputs converter by maximum non-linear deviation.
Step motor controlled driving circuit is mainly by AT89S51 single-chip microcomputer, integrated schmidt trigger 74HC14, and power drive chip ULN2003A forms.Using the operation principle of this drive circuit for be made pulsqe distributor by software, export control word by the P1 mouth of single-chip microcomputer, P1 mouth is built-in by pull-up resistor, and driving force is stronger.The signal of P1 mouth output is through Schmidt trigger, when making circuit state change again, making the edge of output voltage waveforms become very steep by the positive feedback process within circuit, thus eliminating interference, making system response rapid.Schmidt trigger signal out amplifies the work of rear drive motor through ULN2003.
As being applied to the product of real life, except comfortableness and convenience, safety problem is the matter of utmost importance that we must take into.In the design of native system, in order to ensure the safety of bathing, take a series of security alarm measure.Mainly there is leaving water temperature off-limit alarm, the warning of input through keyboard temperature beyond limit and sensor fault warning etc., when temperature beyond limit, buzzer work is controlled by P3.3 mouth, buzzer uses 3V running voltage, being driven by 2N5551NPN type low-power transistor, diode constitutes low level loop, and buzzer so can be made to work edging trigger mode again.
Advantages of the present invention: the present invention, by indoor controller, inputs predetermined temperature, actuator automatically rapidly adjusts predetermined temperature, efficient and convenient, eliminate user oneself and regulate the trouble of water heater temperature and reliable design, possess alarm device, there is certain market prospect.
Accompanying drawing explanation
Fig. 1 is the system block diagram of the present invention；
Fig. 2 is security alarm circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
It is the system block diagram of the present invention in conjunction with Fig. 1, Fig. 1.The hardware of the present invention is designed by core processor, peripheral circuit and external equipment three part.Core processor selects the 89S51 series monolithic that atmel corp produces, the power circuit that periphery circuit design is necessary, reset circuit etc..External equipment is divided into several part to be designed: input through keyboard circuit, digital pipe display circuit, temperature sampling circuit, outer watchdog circuit and buzzer alarm circuit, stepper motor driving circuit.System devises a road analog quantity and turns digital quantity input (water outlet of water heater mouth temperature)；Three On-off signal (temperature adds a signal, the temperature signal that subtracts, determine input signal)；Numeral method part is by two 10 system digital-scroll technique, and indication range is 0～99 degree.
Input through keyboard circuit: 3 singly-bounds (add, subtract, it is determined that).Can be designed with three in the five of single-chip microcomputer interrupt source, it is also possible to be designed with interrupt expansion.Owing to single-chip microcomputer pin is limited, the design initial stage can't determine whether additional resource for, also has the efficiency that the promptness considering keyboard response and single-chip microcomputer run, so native system adopts interrupt expansion control mode, namely three singly-bounds are first connected with three I/O mouths respectively, are then connected to single-chip microcomputer external interrupt 0 interface again through with door.
Temperature sampling circuit: adopt temperature sensor platinum resistance Pt1000.The physical and chemical performance of platinum resistance thermometer sensor, is very stable in high temperature and Oxidant, and it can serve as industry temperature element, and this element linear is better.When 0 100 degrees Celsius, signal, less than 0.5 degree Celsius, is amplified by operational amplifier, then inputs converter by maximum non-linear deviation.
Step motor controlled driving circuit is mainly by AT89S51 single-chip microcomputer, integrated schmidt trigger 74HC14, and power drive chip ULN2003A forms.Using the operation principle of this drive circuit for be made pulsqe distributor by software, export control word by the P1 mouth of single-chip microcomputer, P1 mouth is built-in by pull-up resistor, and driving force is stronger.The signal of P1 mouth output is through Schmidt trigger, when making circuit state change again, making the edge of output voltage waveforms become very steep by the positive feedback process within circuit, thus eliminating interference, making system response rapid.Schmidt trigger signal out amplifies the work of rear drive motor through ULN2003.
It is security alarm circuit in conjunction with Fig. 2, Fig. 2.As being applied to the product of real life, except comfortableness and convenience, safety problem is the matter of utmost importance that we must take into.In the design of native system, in order to ensure the safety of bathing, take a series of security alarm measure.Mainly there is leaving water temperature off-limit alarm, the warning of input through keyboard temperature beyond limit and sensor fault warning etc., when temperature beyond limit, buzzer work is controlled by P3.3 mouth, buzzer uses 3V running voltage, being driven by 2N5551NPN type low-power transistor, diode constitutes low level loop, and buzzer so can be made to work edging trigger mode again.
Claims (5)
1. a SCM Based gas heater temperature controller, is characterized in that the hardware of the present invention is designed by core processor, peripheral circuit and external equipment three part；Core processor selects the 89S51 series monolithic that atmel corp produces, the power circuit that periphery circuit design is necessary, reset circuit etc.；External equipment is divided into several part to be designed: input through keyboard circuit, digital pipe display circuit, temperature sampling circuit, outer watchdog circuit and buzzer alarm circuit, stepper motor driving circuit；System devises a road analog quantity and turns digital quantity input (water outlet of water heater mouth temperature)；Three On-off signal (temperature adds a signal, the temperature signal that subtracts, determine input signal)；Numeral method part is by two 10 system digital-scroll technique, and indication range is 0～99 degree.
2. the SCM Based gas heater temperature controller of one according to claim 1, is characterized in that input through keyboard circuit: 3 singly-bounds (add, subtract, it is determined that)；Can be designed with three in the five of single-chip microcomputer interrupt source, it is also possible to be designed with interrupt expansion；Owing to single-chip microcomputer pin is limited, the design initial stage can't determine whether additional resource for, also has the efficiency that the promptness considering keyboard response and single-chip microcomputer run, so native system adopts interrupt expansion control mode, namely three singly-bounds are first connected with three I/O mouths respectively, are then connected to single-chip microcomputer external interrupt 0 interface again through with door.
3. the SCM Based gas heater temperature controller of one according to claim 1, is characterized in that temperature sampling circuit: adopt temperature sensor platinum resistance Pt1000；The physical and chemical performance of platinum resistance thermometer sensor, is very stable in high temperature and Oxidant, and it can serve as industry temperature element, and this element linear is better；When 0 100 degrees Celsius, signal, less than 0.5 degree Celsius, is amplified by operational amplifier, then inputs converter by maximum non-linear deviation.
4. the SCM Based gas heater temperature controller of one according to claim 1, is characterized in that step motor controlled driving circuit is mainly by AT89S51 single-chip microcomputer, integrated schmidt trigger 74HC14, and power drive chip ULN2003A forms；Using the operation principle of this drive circuit for be made pulsqe distributor by software, export control word by the P1 mouth of single-chip microcomputer, P1 mouth is built-in by pull-up resistor, and driving force is stronger；The signal of P1 mouth output is through Schmidt trigger, when making circuit state change again, making the edge of output voltage waveforms become very steep by the positive feedback process within circuit, thus eliminating interference, making system response rapid；Schmidt trigger signal out amplifies the work of rear drive motor through ULN2003.
5. the SCM Based gas heater temperature controller of one according to claim 1, is characterized in that as being applied to the product of real life, and except comfortableness and convenience, safety problem is the matter of utmost importance that we must take into；In the design of native system, in order to ensure the safety of bathing, take a series of security alarm measure；Mainly there is leaving water temperature off-limit alarm, the warning of input through keyboard temperature beyond limit and sensor fault warning etc., when temperature beyond limit, buzzer work is controlled by P3.3 mouth, buzzer uses 3V running voltage, being driven by 2N5551NPN type low-power transistor, diode constitutes low level loop, and buzzer so can be made to work edging trigger mode again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410752239.4A CN105737388A (en) | 2014-12-11 | 2014-12-11 | Temperature controller used for gas water heater and based on single chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410752239.4A CN105737388A (en) | 2014-12-11 | 2014-12-11 | Temperature controller used for gas water heater and based on single chip microcomputer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105737388A true CN105737388A (en) | 2016-07-06 |
Family
ID=56239847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410752239.4A Pending CN105737388A (en) | 2014-12-11 | 2014-12-11 | Temperature controller used for gas water heater and based on single chip microcomputer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105737388A (en) |
-
2014
- 2014-12-11 CN CN201410752239.4A patent/CN105737388A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102022832B (en) | Water temperature control device and water temperature control method for gas water heater | |
| CN203323347U (en) | constant temperature gas water heater | |
| CN103047752B (en) | Water-heater system and control method thereof | |
| CN107728685B (en) | Intelligent constant-temperature water control method | |
| CN103884105B (en) | A kind of constant-temperature bathing system | |
| CN205002407U (en) | Constant -temperature gas water heater | |
| CN102778019A (en) | Instantaneous gas water heater with accurate temperature control | |
| CN203053024U (en) | Constant-temperature gas water heater control system with water yield settable | |
| CN107238207B (en) | Control method of gas water heater and gas water heater | |
| US20140014312A1 (en) | Energy-efficient hot water supply apparatus | |
| CN110207389A (en) | Control method for pressurization function of gas water heater | |
| CN103743114A (en) | Water temperature automatic control circuit for temperature constant water heater | |
| CN202792559U (en) | Instant electric water heater | |
| CN202252130U (en) | Novel energy-saving constant temperature faucet | |
| US20130015172A1 (en) | Electric heating device | |
| CN105737388A (en) | Temperature controller used for gas water heater and based on single chip microcomputer | |
| CN110513859A (en) | Thermostatic water heaters and constant temperature of the combustion gas in conjunction with other heat sources go out the adjusting method of hot water | |
| CN202795092U (en) | Continuous heating water thermostatic device | |
| CN103868240A (en) | Gas water heater temperature control system | |
| ATE335169T1 (en) | CONTROL METHOD AND CONTROLLER FOR CONTROLLING A BURNER | |
| CN202166118U (en) | Hot water supply system and control device thereof | |
| TWI477724B (en) | Method for controlling water heater with water flow rate control valve | |
| CN215951754U (en) | Gas water heater | |
| CN110470064A (en) | Thermostatic water heaters and constant temperature of the solar energy in conjunction with combustion gas go out the adjusting method of hot water | |
| CN203585532U (en) | Intelligent constant-temperature tap |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160706 |
|
| WD01 | Invention patent application deemed withdrawn after publication |