CN2252312Y - Microcomputer constant-temp. controllor for gas water heater - Google Patents
Microcomputer constant-temp. controllor for gas water heater Download PDFInfo
- Publication number
- CN2252312Y CN2252312Y CN 95244218 CN95244218U CN2252312Y CN 2252312 Y CN2252312 Y CN 2252312Y CN 95244218 CN95244218 CN 95244218 CN 95244218 U CN95244218 U CN 95244218U CN 2252312 Y CN2252312 Y CN 2252312Y
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- CN
- China
- Prior art keywords
- circuit
- temperature
- resistance
- gas
- chip microcomputer
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a device which conducts constant temperature control to the leaving water temperature of a gas water heater by a microcomputer. The utility model is composed of an SCM, a temperature measurement circuit, an executing circuit, a gas valve, and a temperature setting and displaying device. The temperature measurement circuit transfers a detected signal of the leaving water temperature to the SCM, and adjusts a gas valve opening after comparing with the presetting temperature. The utility model maintains the leaving water temperature constant by controlling a combustion gas volume.
Description
The utility model relates to a kind of micro computer that utilizes the gas heater leaving water temperature is carried out thermostatically controlled device.
Commercially available gas heater, the adjusting of its leaving water temperature are to realize by the water yield by-pass cock and the air volume regulating switch that are arranged on the water heater.Because water heater requires to be installed in outside the bathroom, the user must treat could try out after the water heater water outlet whether appropriateness of water temperature, in case regulate improperly, make troubles for shower person.In addition, the area of some hydraulic pressure shakinesses, because air demand is once to set up, the fluctuation of the water yield directly has influence on leaving water temperature, cold and hot irregular leaving water temperature makes shower person feel discomfort very much.
The purpose of this utility model is will provide a kind of can regulate air demand rapidly according to the variation of leaving water temperature, thereby keeps the constant radiator valve of design temperature, to improve existing water heater performance.
The purpose of this utility model is implemented by following technical measures: comprise the single-chip microcomputer IC that makes the master control unit
1, its peripheral circuit has the thermometric temperature, and temperature is provided with circuit and is used to control the executive circuit and the gas valve of gas quantity.Temperature measurement circuit is by thermistor RT and resistance R
5Form bleeder circuit, this magnitude of voltage is from single-chip microcomputer IC
1Mould/several mouthfuls of inputs; Temperature is provided with circuit by two charactrons, 7 current-limiting resistance R
1, two triode T
1, T
2, two output resistance R
2, draw high resistance R for two
3And button K
1, K
2Form; Executive circuit adopts the PWM regulating circuit, by integrating circuit R
7, C
3, operational amplifier IC
2, resistance R
8, R
9With triode T
3Form; Measuring circuit is given main control singlechip with detected water heater leaving water temperature signal feedback, by single-chip microcomputer with temperature be set compare, when leaving water temperature when temperature be set do not match, according to the difference of the two, the aperture of executive circuit control gas valve.
The utility model is regulated gas quantity by the size of perceive heat hydrophone leaving water temperature, thereby realizes the constant control to leaving water temperature.Both can regulate temperature automatically, can be fit to the thermostatic control in the unstable area of hydraulic pressure again, be installed in line traffic control mobile phone in the bathroom, can be provided with and regulate water temperature easily by operation according to water consumption size.
Following the utility model provides embodiment.
Fig. 1 is the utility model embodiment circuit block diagram.
Fig. 2 is the utility model embodiment circuit diagram.
Referring to Fig. 1, Fig. 2, the utility model embodiment makes the master control unit with 8 single-chip microcomputers.Its peripheral circuit has temperature measurement circuit, and temperature is provided with circuit, executive circuit and be used to control the gas valve of gas quantity.Cooling-water temperature sensor in the temperature measurement circuit adopts thermistor RT, and the resistance of thermistor varies with temperature and changes, and resistance is corresponding one by one with temperature.Thermistor and R
5Form bleeder circuit, partial pressure value is by mould/several mouthfuls of input single-chip microcomputer IC
1In, just can calculate corresponding water temperature by A/D conversion and calculating.It is the line traffic control mobile phone operation that temperature is provided with circuit.The line traffic control mobile phone is made up of two charactrons and two buttons, and two numbers are effective to be shown water temperature and temperature is set.Show water temperature during this charactron operate as normal.When pressing certain key and enter state of temperature, show temperature is set.If button no longer in 5 seconds, then withdraw from the state of setting automatically and recover to show water temperature behind the button.The section of charactron is by microcomputer delivery outlet (PB
0~ PB
6) drive through resistance, the position of charactron is by microcomputer delivery outlet (PA
0~ PA
1) drive through triode, work as PA
0When being output as low level, triode T
1Conducting, its colelctor electrode level uprises, and the position of corresponding charactron also becomes high level, if a, b, e, d, g section are output as low level at this moment, all the other section output high level, then left side charactron shows 2.For two charactrons can be shown simultaneously, adopt the mode of scanning to make triode T
1, T
2The timesharing conducting.When switching frequency was higher, naked eyes looked that to resemble two charactrons normal bright the same.One of two button is for adding key, and another is for subtracting key, temperature is set uprises by adding key, by subtracting key the temperature step-down is set.The user can utilize this two keys, easily temperature is arranged on ideal point.Executive circuit adopts the PWM regulating circuit.Gas valve is a proportioning valve.As seen from Figure 2, if from IC
1Delivery outlet PC
3Export the constant pulse of a string cycle, when high level time changes (being that dutycycle changes), by R
7, C
3A point voltage value also changes in the integrating circuit of forming.High level time is elongated, and dutycycle increases, and A point voltage value raises; Otherwise A point voltage value reduces.This voltage is through IC
2Be added to power tube T after the impedance conversion
3Base stage.Be added to the voltage height of base stage, then base current is big, and collector current is big, and the electric current that flows through proportioning valve line bag V is also big, and the aperture of proportioning valve is just big; The voltage that is added to base stage is low, and then base current is little, and collector current is little, and the electric current that flows through proportioning valve line bag V is also little, and the aperture of proportioning valve is just little.Therefore the aperture size of proportioning valve is by PC
3The pulse width of mouth output is controlled.
The utility model can be used as an additional control device and the supporting use of existing water heater, the structure that need not change original water heater.A part as water heater places in the water heater, and the utility model can connect auto-ignition circuit on single-chip microcomputer.Flame-out automatic protection circuit and survey water circuit.The survey water sensor of surveying in the water circuit adopts Hall element.Out-of-date as current, it is output as low level, and this low level signal is by input port PC
2Transport to micro computer.Survey water circuit and can be used for controlling auto-ignition circuit and water heater air valve and gas valve.
The parameter of present embodiment element is as follows: resistance R
1-470 Ω, R
2-4.7K Ω,
R
3~R
6-10KΩ，R
7-20KΩ，
R
3-100 Ω, R
9-10 Ω; Thermistor RT-203CT, capacitor C
1-10 μ f, C
2-27pf,
C
3-0.1 μ f; Triode T
1, T
2-9012, T
3-TIP41; IC
1-6805R
3, IC
2-LM358;
The H-Hall switch;
V-proportioning valve line bag.
Claims (2)
1, a kind of gas heater micro computer radiator valve is characterized in that: comprise the single-chip microcomputer IC that makes a main control unit
1, temperature measurement circuit, temperature is provided with circuit, executive circuit and gas valve, temperature measurement circuit is by thermistor RT and resistance R
5Form bleeder circuit, this magnitude of voltage is from single-chip microcomputer IC
1Mould/several mouthfuls of inputs; Temperature is provided with circuit by two charactrons, 7 current-limiting resistance R
1, two triode T
1, T
2, two output resistance R
2, draw high resistance R for two
3And button K
1, K
2Form; Executive circuit adopts the PWM regulating circuit, by integrating circuit R
7, C
3, operational amplifier IC
2, resistance R
8, R
9With triode T
3Form; Temperature measurement circuit is given main control singlechip with detected water heater leaving water temperature signal feedback, and with temperature is set compares the back and regulate the gas valve aperture by executive circuit.
2, gas heater micro computer radiator valve as claimed in claim 1 is characterized in that: the described single-chip microcomputer of making the master control unit can also connect auto-ignition circuit, flame-out automatic protection circuit and survey water circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244218 CN2252312Y (en) | 1995-06-20 | 1995-06-20 | Microcomputer constant-temp. controllor for gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244218 CN2252312Y (en) | 1995-06-20 | 1995-06-20 | Microcomputer constant-temp. controllor for gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2252312Y true CN2252312Y (en) | 1997-04-16 |
Family
ID=33884653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95244218 Expired - Fee Related CN2252312Y (en) | 1995-06-20 | 1995-06-20 | Microcomputer constant-temp. controllor for gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2252312Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330910C (en) * | 2002-06-26 | 2007-08-08 | 曲波 | Digital control constant temperature water delivery apparatus |
| CN103307757A (en) * | 2013-06-05 | 2013-09-18 | 苏州惠瑞自动化集成有限公司 | Automatic constant-temperature water heating device |
| CN103453664A (en) * | 2012-05-31 | 2013-12-18 | 广东百威电子有限公司 | Control system of thermostatic gas water heater |
-
1995
- 1995-06-20 CN CN 95244218 patent/CN2252312Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330910C (en) * | 2002-06-26 | 2007-08-08 | 曲波 | Digital control constant temperature water delivery apparatus |
| CN103453664A (en) * | 2012-05-31 | 2013-12-18 | 广东百威电子有限公司 | Control system of thermostatic gas water heater |
| CN103307757A (en) * | 2013-06-05 | 2013-09-18 | 苏州惠瑞自动化集成有限公司 | Automatic constant-temperature water heating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |