CN202993569U - Control system of gas heater and gas heater comprising the same - Google Patents
Control system of gas heater and gas heater comprising the same Download PDFInfo
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- CN202993569U CN202993569U CN 201220365909 CN201220365909U CN202993569U CN 202993569 U CN202993569 U CN 202993569U CN 201220365909 CN201220365909 CN 201220365909 CN 201220365909 U CN201220365909 U CN 201220365909U CN 202993569 U CN202993569 U CN 202993569U
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- control unit
- gas heater
- temperature
- proportional valve
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Abstract
The utility model provides a control system of a gas heater and the gas heater comprising the control system of the gas heater, wherein the control system of the gas heater comprises a temperature detecting unit, a proportional valve control unit and a main control unit. The temperature detecting unit is used for detecting water outlet temperature of the gas heater; the proportional valve control unit is used for adjusting gas proportional valve opening of the gas heater; the main control unit is connected with the temperature detecting unit and the proportional valve control unit and is used for controlling the proportional valve control unit to at least once positively adjust the gas proportional valve opening by an opening difference delta a when gas supply quantity is not enough and controlling the proportional valve control unit to at least once reversely adjust the gas proportional valve opening by an opening difference delta b until a difference of detected water outlet temperature and previous temperature value is less than a preset value when the detected water outlet temperature is less than the previous temperature value, wherein the opening difference delta a is larger than the opening difference delta b. By adopting the structure, when the gas supply quantity is not enough, the main control unit can control the proportional valve opening according to the water outlet temperature, achieve optimum burning of the gas, and avoid extinction.
Description
Technical field
The utility model relates to the control system in water heater control technology field, particularly a kind of gas heater and the gas heater that comprises this system.
Background technology
What existing gas heater adopted mostly is all the principle of control temperature of proportional valve.Be provided with temperature sensor and flow sensor in the inlet pipeline of this water heater.When cold water flows to, inflow temperature and flow that the leaving water temperature that its master control set User sets and temperature sensor and flow sensor detect, the output control signal is adjusted the aperture of gas ratio valve, makes gas flow variations that be directly proportional to discharge, heats with control.In water heater working, master control set draws the size of required load according to design temperature signal, inflow temperature signal and water flow signal, and determines that the aperture of proportioning valve makes water heater with temperature constant state work.
Above-mentioned water temperature control mode is applicable to the situation of gas quantity abundance, yet waits at dusk combustion gas to use peak period in summer, due to the Cost Problems of fuel gas pipeline design, cause the situation of family's gas supply deficiency, and this situation causes combustion rate to descend.
The utility model content
For addressing the above problem, the gas heater that the utility model provides a kind of control system of gas heater and comprised this system is in the situation that the gas supply deficiency according to leaving water temperature control ratio valve opening, realizes the best combustion of combustion gas.
The control system of gas heater provided by the utility model comprises: comprising:
Temperature detecting unit is for detection of the leaving water temperature of gas heater;
The proportional valve control unit is for the gas proportion valve opening of adjusting gas heater;
Main control unit, be connected with above-mentioned each unit, be used for when the fuel gas supply quantity not sufficient, the control ratio valve control unit, VCU with aperture difference △ a at least one times forward adjust described gas proportion valve opening, and at the leaving water temperature that detects during lower than temperature last time, control is oppositely adjusted described gas proportion valve opening at least one times with aperture difference △ b, to the leaving water temperature that detects with temperature value difference last time less than a setting value; Wherein, aperture difference △ a〉aperture difference △ b.
By upper, in the situation that the gas supply deficiency, main control unit can be realized the best combustion of combustion gas according to leaving water temperature control ratio valve opening, avoids flame-out.
Optionally, also comprise:
The blower fan driver element is for the blower fan that drives gas heater;
Described main control unit also is connected with the blower fan driver element, also is used for controlling when adjusting described gas proportion valve opening, controls the wind speed that the described blower fan of blower fan drive unit drives reaches corresponding described gas proportion valve opening.
By upper, the aperture of passing ratio valve is combined with rotation speed of fan, realizes accurately controlling the best combustion of combustion gas.
In addition, the application also provides a kind of gas heater, comprises the described control system of claim.
By upper, in the situation that the gas supply deficiency according to leaving water temperature control ratio valve opening, realizes the best combustion of combustion gas.
Description of drawings
Fig. 1 is the structural representation of gas water heater control system;
Fig. 2 is the circuit diagram of gas water heater control system;
Fig. 3 is the workflow diagram of gas heater;
Fig. 4 is the workflow diagram of main control unit in gas water heater control system.
The specific embodiment
The gas heater that the utility model embodiment provides a kind of control system of gas heater and comprised this system is in the situation that the gas supply deficiency is by the regulating gas valve opening, to reach optimal combustion state.Below in conjunction with accompanying drawing, embodiment is described in detail to the utility model.
The structural representation of gas water heater control system as shown in Figure 1 and the circuit diagram shown in Fig. 2, the control system of gas heater provided by the utility model comprises main control unit 10 at least, and the blower fan driver element 11 that is connected with main control unit 10, rotation speed of fan detecting unit 12, temperature detecting unit 13 and proportional valve control unit 14.
Described main control unit 10 is used for judging whether the gas supply amount is sufficient, when the gas supply quantity not sufficient, main control unit 10 output control informations, reduce the rotating speed of blower fan 23 and the aperture that passing ratio valve control unit, VCU 14 reduces proportioning valve 20 by blower fan driver element 11, until leaving water temperature is stable, the expression combustion gas reaches best combustion.Wherein, the control information that main control unit 10 is exported comprises: pulsewidth modulation (PWM, Pulse Width Modulation) information, to adjust the rotating speed of blower fan 23 by blower fan driver element 11; Current information, the aperture of passing ratio valve control unit, VCU 14 control ratio valves 20.As shown in Figure 2, the function of described main control unit 10 is by comprising that model is the circuit realization of the integrated chip of IC1.
In addition, also comprise the memory cell (not shown) and the clock unit (not shown) that are connected with main control unit 10, cell stores has the one-to-one function relational expression of air inlet amount and gas inlet amount under different temperatures, i.e. the one-to-one function relational expression of the aperture of the rotating speed of blower fan 23 and proportioning valve 20; Clock unit is used for the time of the leaving water temperature that the record temperature detecting unit that receives 13 detects.
Blower fan driver element 11 is used for the corresponding voltage that exports blower fan 23 to of adjusting of output pulse width modulation intelligence with main control unit 10 outputs.Blower fan driver element 11 is realized by the circuit that is composed in series by triode N7, FET M1 and inductance L 3.The base stage of triode N7 is connected with the data transmission port of IC1 chip in main control unit 10, and the grid of FET M1 is connected, and first, second resistance (R2, R3) is rear to be connected with the colelctor electrode of triode N7, and drain electrode is connected with inductance L 3.
Rotation speed of fan detecting unit 12 is by comprising that model is the circuit realization of the comparator of LM358A.Wherein, comparator pin 3 is inputted is the PWM waveform through RC filtered blower fan 23, and pin 2 is exported be the Feedback of Power information of blower fan 23, and pin 1 is exported the proportional feedback current of PWM waveform to blower fan 23.Above-mentioned Feedback of Power information and feedback current all transfer to the IC1 chip in main control unit 10.
Temperature detecting unit 13 is realized by temperature sensor, for detection of the leaving water temperature of water heater.Described temperature detecting unit 13 is connected with the data transmission port of IC1 chip in main control unit 10.
The switching of main valve and the aperture of proportioning valve 20 are controlled according to the current information of main control unit 10 outputs in proportional valve control unit 14.As shown in Figure 2, circuit comprises the first sectioning valve interface and the second sectioning valve interface, above-mentioned two interfaces by the different electric currents that receive main control unit 10 and export with the aperture of proportioning valve 20 be divided into little, in, large Three Estate, by the stack with institute's output current, the aperture of resize ratio valve 20.
In addition, also comprise voltage detection unit, discharge detecting unit and power supply unit, wherein, voltage detection unit is for detection of the stability of each unit 5V, 12V supply voltage; The discharge detecting unit is connected with main control unit 10, for detection of discharge information, is convenient to main control unit 10 discharge information is combined with the temperature that the user sets, with the aperture of output control information control ratio valve 20.Accordingly, also store under different temperatures and discharge the one-to-one function relational expression of air inlet amount and gas inlet amount in memory cell.
The below introduces the workflow of gas heater in the present embodiment, as shown in Figure 3, after receiving the target temperature that the user sets in main control unit 10, export according to the functional relation that memory cell is stored the PWM information of controlling blower fan 23 rotating speeds, and the different current informations of proportioning valve 20 apertures.Proportioning valve 20 received current information are regulated aperture, and to control the gas inlet amount, after blower fan 23 drove by blower fan driver element 11, corresponding adjusting rotary speed provided the air inlet amount flux matched with gas inlet.Main control unit 10 detects the electric current adjustment output PWM information of blower fan 23 according to rotation speed of fan detecting unit 12, realize the stepless time adjustment of blower fan 23.Combustion gas mixes with air, fully after burning, heat is passed to heat exchanger 22 in burner 21.Cold water heats in heat exchanger 22, is flowed out by outlet pipe.Temperature detecting unit 13 detects coolant-temperature gage, and with temperature feedback to main control unit 10, judge by main control unit 10 User design temperatures and current leaving water temperature whether the gas supply amount is sufficient, when the gas supply quantity not sufficient, main control unit 10 output control informations realize the best combustion of combustion gas with the aperture of resize ratio valve 20.As shown in Figure 4, the closed-loop adjustment process of main control unit 10 comprises step:
Step S10: adjust the electric current I n+1 value of control ratio valve 20 apertures greater than the In value, with corresponding resize ratio valve 20 aperture sizes, its aperture is increased;
Step S20: during the leaving water temperature Tn+1 value that judgement detects 〉=Tn value, return to step S10 continuation adjustment, otherwise enter step S30;
Step S10 and step S20 are for judge whether sufficient step of gas supply amount, and its principle is: the electric current of leaving water temperature output control ratio valve 20 apertures that User sets and the PWM information of control blower fan 23 rotating speeds.The rotating speed of blower fan 23 is by the aperture decision of proportioning valve 20, that is, described current information and PWM information have the certain proportion relation.Along with the increase of output current, for example, the each corresponding increase of output current value M milliampere, the corresponding increase of the aperture of proportioning valve 20 △ a, leaving water temperature rises thereupon.Twice of the front and back leaving water temperature difference that main control unit 10 accounting temperature detecting units 13 detect if temperature rises and reaches in the given time user's setting value, represents that the gas supply amount is sufficient; If the leaving water temperature that detects does not reach user's setting value in the given time, or twice of front and back leaving water temperature is on a declining curve, represents the gas supply quantity not sufficient.
Step S30: adjust the electric current I n+1 value of control ratio valve 20 apertures less than the In value, the aperture size with corresponding resize ratio valve 20 reduces its aperture;
In the insufficient situation of fuel gas supply amount, main control unit 10 reduces output current value, and the aperture that reduces proportioning valve 20 is controlled in the output control information, controls simultaneously the rotating speed that reduces blower fan 23.
Need to prove, each output current value reduces the M/3 milliampere, and the corresponding minimizing of the aperture of proportioning valve 20 △ b is understood that △ b is about 1/3 of △ a, thus to improve the precision of controlling the gas inlet amount.
Step S40: during the leaving water temperature Tn+1 value that judgement detects＞Tn value, return to step S30 continuation adjustment, until Tn+1 value ≈ Tn value.
When the temperature difference of twice water outlet in front and back is being preset in error range, think that leaving water temperature is stable, namely be illustrated under the state of current gas supply amount, combustion gas and air reach best proportioning, are in the best combustion point.This moment control module storaging current In value, and the current value (maximum combustion point) when replacing former acquiescence aperture maximum.For improving the accuracy that detects, also desirable repeatedly temperature gap is to judge.
When water heater starts again, recover the current value when in memory cell, aperture is maximum.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; for example; the module of difference in functionality can be realized by an integrated chip etc.; all within spirit of the present utility model and principle; any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. the control system of a gas heater, is characterized in that, comprising:
Temperature detecting unit (13) is for detection of the leaving water temperature of gas heater;
Proportional valve control unit (14) is for the gas proportion valve opening of adjusting gas heater;
Main control unit (10), be connected with above-mentioned each unit, be used for control ratio valve control unit, VCU (14) with aperture difference △ a forward adjust described gas proportion valve opening to leaving water temperature lower than temperature last time, and control with aperture difference △ b and oppositely adjust described gas proportion valve opening, to leaving water temperature with temperature value difference last time less than a setting value; Wherein, aperture difference △ a〉aperture difference △ b.
2. system according to claim 1, is characterized in that, also comprises:
Blower fan driver element (11) is for the blower fan that drives gas heater;
Described main control unit (10) also is connected with blower fan driver element (11), also is used for controlling when adjusting described gas proportion valve opening, controls blower fan driver element (11) and drives the wind speed that described blower fan reaches corresponding described gas proportion valve opening.
3. a gas heater, is characterized in that, comprises the described control system of claim 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365909 CN202993569U (en) | 2012-07-26 | 2012-07-26 | Control system of gas heater and gas heater comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365909 CN202993569U (en) | 2012-07-26 | 2012-07-26 | Control system of gas heater and gas heater comprising the same |
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| Publication Number | Publication Date |
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| CN202993569U true CN202993569U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220365909 Expired - Fee Related CN202993569U (en) | 2012-07-26 | 2012-07-26 | Control system of gas heater and gas heater comprising the same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214957A (en) * | 2014-08-18 | 2014-12-17 | 芜湖美的厨卫电器制造有限公司 | Water heater with wireless temperature controller |
| CN105276270A (en) * | 2014-07-15 | 2016-01-27 | 黄依华 | Method and structure for controlling opening degree of fuel gas proportional valve through air speed of exhaust fan |
| CN106168816A (en) * | 2015-05-20 | 2016-11-30 | 豪威株式会社 | Warm water supply method, warm water feedway and utilize its water purifier |
| CN109724258A (en) * | 2017-10-30 | 2019-05-07 | 青岛经济技术开发区海尔热水器有限公司 | The secondary pressure adjusting method of gas heater and gas heater |
| CN109869893A (en) * | 2019-01-29 | 2019-06-11 | 广东万和热能科技有限公司 | A kind of blower control method and system of gas heater |
| CN110081607A (en) * | 2019-03-28 | 2019-08-02 | 青岛经济技术开发区海尔热水器有限公司 | A kind of gas heater control method, control system and gas heater |
| CN110530031A (en) * | 2018-05-24 | 2019-12-03 | 青岛海尔智能技术研发有限公司 | A kind of gas heater control method |
| CN111059567A (en) * | 2018-10-17 | 2020-04-24 | 宁波方太厨具有限公司 | Combustion control method for reducing minimum heat load |
| CN111141031A (en) * | 2018-11-05 | 2020-05-12 | 宁波方太厨具有限公司 | Automatic fault detection method for gas water heater |
| CN111306801A (en) * | 2020-02-25 | 2020-06-19 | 广东万家乐燃气具有限公司 | Control method and system of water heater |
| CN111912123A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Full-premixing condensation wall-mounted furnace and control method thereof |
| CN111912124A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Wall-mounted furnace and control method thereof |
-
2012
- 2012-07-26 CN CN 201220365909 patent/CN202993569U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105276270A (en) * | 2014-07-15 | 2016-01-27 | 黄依华 | Method and structure for controlling opening degree of fuel gas proportional valve through air speed of exhaust fan |
| CN105276270B (en) * | 2014-07-15 | 2017-08-11 | 黄依华 | Utilize the method and construction of exhaust blower blast velocity control gas proportion valve opening |
| CN104214957A (en) * | 2014-08-18 | 2014-12-17 | 芜湖美的厨卫电器制造有限公司 | Water heater with wireless temperature controller |
| CN104214957B (en) * | 2014-08-18 | 2017-02-22 | 芜湖美的厨卫电器制造有限公司 | Water heater with wireless temperature controller |
| CN106168816A (en) * | 2015-05-20 | 2016-11-30 | 豪威株式会社 | Warm water supply method, warm water feedway and utilize its water purifier |
| CN106168816B (en) * | 2015-05-20 | 2020-12-11 | 豪威株式会社 | Hot water supply method, hot water supply device, and water purifier using same |
| US10604399B2 (en) | 2015-05-20 | 2020-03-31 | Coway Co., Ltd | Hot water supply method, hot water supply device, and water purifier using same |
| CN109724258A (en) * | 2017-10-30 | 2019-05-07 | 青岛经济技术开发区海尔热水器有限公司 | The secondary pressure adjusting method of gas heater and gas heater |
| CN110530031A (en) * | 2018-05-24 | 2019-12-03 | 青岛海尔智能技术研发有限公司 | A kind of gas heater control method |
| CN111059567A (en) * | 2018-10-17 | 2020-04-24 | 宁波方太厨具有限公司 | Combustion control method for reducing minimum heat load |
| CN111059567B (en) * | 2018-10-17 | 2021-10-29 | 宁波方太厨具有限公司 | Combustion control method for reducing minimum heat load of gas water heating device |
| CN111141031A (en) * | 2018-11-05 | 2020-05-12 | 宁波方太厨具有限公司 | Automatic fault detection method for gas water heater |
| CN111141031B (en) * | 2018-11-05 | 2021-06-15 | 宁波方太厨具有限公司 | Automatic fault detection method for gas water heater |
| CN109869893A (en) * | 2019-01-29 | 2019-06-11 | 广东万和热能科技有限公司 | A kind of blower control method and system of gas heater |
| CN110081607A (en) * | 2019-03-28 | 2019-08-02 | 青岛经济技术开发区海尔热水器有限公司 | A kind of gas heater control method, control system and gas heater |
| CN110081607B (en) * | 2019-03-28 | 2021-01-19 | 青岛经济技术开发区海尔热水器有限公司 | Control method and control system of gas water heater and gas water heater |
| CN111306801A (en) * | 2020-02-25 | 2020-06-19 | 广东万家乐燃气具有限公司 | Control method and system of water heater |
| CN111912123A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Full-premixing condensation wall-mounted furnace and control method thereof |
| CN111912124A (en) * | 2020-08-21 | 2020-11-10 | 东莞市艾瑞科热能设备有限公司 | Wall-mounted furnace and control method thereof |
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Legal Events
| 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: 20130612 Termination date: 20210726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |