CN111854172A - Gas water heater and load control method thereof - Google Patents
Gas water heater and load control method thereof Download PDFInfo
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- CN111854172A CN111854172A CN201910363625.7A CN201910363625A CN111854172A CN 111854172 A CN111854172 A CN 111854172A CN 201910363625 A CN201910363625 A CN 201910363625A CN 111854172 A CN111854172 A CN 111854172A
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- premixer
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a gas water heater and a load control method thereof, wherein the gas water heater comprises a first valve for adjusting gas input quantity, a second valve for adjusting air input quantity, a premixer for mixing air and gas and a combustion unit for generating heat, the first valve and the second valve are respectively communicated with a pipeline of the premixer, the premixer is communicated with the combustion unit, the control of air flow entering the premixer is realized by controlling the opening degree of the second valve, the opening degree of the first valve is adaptively adjusted, the control of the gas flow entering the premixer is realized, the heating power of the combustion unit and the load of the gas water heater are further controlled, and the reliability is strong.
Description
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to a gas water heater and a load control method thereof.
Background
The gas water heater adopts gas as fuel, hot water is rapidly prepared by gas combustion, the gas water heater is fully premixed, before the gas is combusted, the gas and air need to be mixed and then combusted, and no secondary air participates in the combustion process, so that the gas water heater adopting the combustion mode is called as a fully premixed gas water heater.
The existing full-premixing gas water heater adopts a control scheme of a direct-current brushless fan, and changes the air quantity entering a premixer by changing the rotating speed of the fan, thereby changing the opening degree of an air-fuel proportional valve and changing the gas quantity entering a premixing cavity. However, the cost of the dc fan is high and the control logic is complex.
Disclosure of Invention
The invention aims to provide a gas water heater and a load control method thereof, and solves the problem that in the prior art, the load control of the gas water heater is inconvenient by controlling the air quantity through a direct current fan.
The technical scheme adopted by the invention is that,
a gas water heater comprising: the gas burner comprises a first valve for adjusting the input amount of gas, a second valve for adjusting the input amount of air, a premixer for mixing air and gas and a combustion unit for generating heat, wherein the first valve and the second valve are respectively communicated with the premixer pipeline, and the premixer is communicated with the combustion unit.
The gas water heater also comprises a first control unit used for adjusting the opening degree of the second valve, and the first control unit is in signal connection with the second valve.
The gas water heater also comprises a fan used for mixing air and gas, one end of the fan is communicated with the premixer, and the other end of the fan is communicated with the combustion unit.
The second valve comprises an adjusting valve, the first control unit comprises a stepping motor, and the step number of the stepping motor is matched with the opening degree of the adjusting valve.
The gas water heater also comprises a controller module, and the controller module is respectively in signal connection with the first control unit, the fan and the first valve.
The first valve comprises a proportional valve.
A load control method for a gas water heater comprises the following steps:
adjusting the opening degree of the second valve according to the relationship between the opening degree of the second valve and the load of the gas water heater, and controlling the air quantity entering the premixer from the second valve; determining the gas quantity in the premixer according to the proportional relation between the air quantity and the gas quantity in the premixer, and adjusting the opening degree of a first valve; the load of the gas water heater is controlled.
Adjusting the opening degree of the second valve according to the relationship between the opening degree of the second valve and the load of the gas water heater, and controlling the air quantity entering the premixer from the second valve, specifically: and providing a stepping motor for adjusting the opening degree of the second valve, wherein the second valve comprises an adjusting valve, the step number of the stepping motor is matched with the opening degree of the adjusting valve, the step number of the stepping motor and the relation of the load of the gas water heater are determined according to the opening degree of the second valve and the relation of the load of the gas water heater, the step number of the stepping motor is adjusted according to the step number of the stepping motor and the relation of the load of the gas water heater, and the air quantity entering the premixer from the second valve is controlled.
According to the ratio of the air volume to the gas volume in the premixer, determining the gas volume in the premixer, and adjusting the opening degree of the first valve, specifically: providing a controller module, the controller module respectively with step motor and first valve signal connection, the controller module still includes the proportional relation of air volume and gas volume in the premixer and the aperture of first valve with the relation of gas volume in the premixer, through the proportional relation of air volume and gas volume in premixer in air volume and the premixer, confirm required gas volume in the premixer, through the aperture of first valve with the relation of gas volume in the premixer adjusts the aperture of first valve.
The gas heater still include the fan that is used for mixed air and gas, the one end of fan with the premixer intercommunication, the other end of fan with the combustion unit intercommunication, just the fan with controller module signal connection.
Compared with the prior art, when the gas control system is used, the air quantity entering the premixer is controlled by controlling the opening degree of the second valve, the opening degree of the first valve is adaptively adjusted, the gas quantity entering the premixer is controlled, the heating power of a combustion unit and the load of a gas water heater are further controlled, and the reliability is high.
Drawings
FIG. 1 is a schematic structural diagram of a gas water heater provided in embodiment 1 of the present invention
Fig. 2 is a schematic flow chart of a load control method for a gas water heater provided in embodiment 2 of the present invention.
FIG. 3 is a schematic diagram of the relationship between the gas quantity and the load of the gas water heater in the embodiment of the invention.
Fig. 4 is a schematic diagram of the relationship between the second valve and its opening degree in the embodiment of the present invention.
Fig. 5 is a schematic diagram showing the relationship between the gas amount and the air amount in the embodiment of the invention.
Fig. 6 is a diagram illustrating the relationship between the number of steps of the step electrode and the opening of the second valve in the embodiment of the present invention.
FIG. 7 is a graph showing the relationship between the number of steps of the step electrode and the load of the gas water heater in the embodiment of the present invention.
Fig. 8 is a schematic flow chart of a load control method for a gas water heater provided in embodiment 3 of the present invention.
The reference numbers are as follows:
101. the system comprises a gas inlet, 102, a cold water inlet, 103, a hot water outlet, 2, a controller module, 3, a first valve, 4, a gas connecting pipe, 5, a fan, 6, a premixer, 7, an air inlet pipe, 8, a first control unit, 9, a second valve, 10, a combustion unit, 11, a combustor, 12, an exchanger, 13, a smoke exhaust pipe and 14, an ash collecting cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment 1 of the present invention provides a gas water heater, as shown in fig. 1, including:
the gas-fired boiler comprises a first valve 3 for adjusting gas input quantity, a second valve 9 for adjusting air input quantity, a premixer 6 for mixing air and gas and a combustion unit 10 for generating heat, wherein the first valve 3 and the second valve 9 are respectively communicated with the premixer 6 through pipelines, the premixer 6 is communicated with the combustion unit 10, under the condition that the air flow rate is constant, the control of the air flow entering the premixer 6 is realized by controlling the opening degree of the second valve 9, the opening degree of the first valve 3 is adaptively adjusted, the control of the gas flow entering the premixer is realized, the heating power of the combustion unit 10 and the load of a gas water heater are further controlled, and the reliability is high.
In one implementation process, a gas inlet 101 is communicated with a first valve 3, an output end of the first valve 3 is communicated with a premixer 6 through a gas connecting pipe 4, the control of the gas amount in the premixer 6 is realized by controlling the opening degree of the first valve 3, an air inlet pipe 7 is adaptively arranged with a second valve 9, the control of the air amount in the premixer 6 is realized by controlling the opening degree of the second valve 9, the gas and the air are mixed in the premixer, and the gas and the air are input into a combustion unit 10 to generate heat, in the implementation process, the combustion unit 10 can be matched with a combustor 11, an exchanger 12, a smoke exhaust pipe 13 and an ash collecting cover 14 and is adaptively matched with a cold water inlet 102 and a hot water outlet 103, the cold water inlet 102 and the hot water outlet 103 are respectively communicated with the exchanger 12 to realize the input of cold water from the cold water inlet 102, the combustion and the heat exchange are realized in the exchanger 12, and out of the hot water outlet 103.
In order to facilitate the control of the opening degree of the second valve 9, the gas water heater is further provided with a first control unit 8 for adjusting the opening degree of the second valve 9, the first control unit 8 is in signal connection with the second valve 9, in other specific implementation processes, the second valve 9 comprises an adjusting valve, the first control unit 8 comprises a stepping motor, the step number of the stepping motor is matched with the opening degree of the adjusting valve, and the adjustment of the opening degree of the second valve 9 is converted into the adjustment of the step number of the stepping motor by establishing a mapping relation between the first control unit 8 (the step number of the stepping motor) and the second valve 9 (the opening degree of the adjusting valve), so that the control is convenient, and the control precision can be increased.
The gas heater is still including the fan 5 that is used for mixed air and gas, the one end of fan 5 with premixer 6 intercommunication, the other end of fan 5 with combustion unit 10 intercommunication, fan 5 can adopt the fan of deciding the speed, has ensured that the velocity of flow of air and gas is at the uniform velocity, and then has ensured premixer 6 air quantity and gas volume's proportional relation stable, can promote the mixture of air and gas moreover, improves combustion efficiency, avoids the burning inadequately.
For the purpose of coordinated control, the gas water heater further comprises a controller module 2, the controller module 2 is in signal connection with the first control unit 8, the fan 5 and the first valve 3, and for the convenience of controlling the opening degree of the first valve 3 by the controller module 2, the first valve 3 comprises a proportional valve.
An embodiment 2 of the present invention provides a load control method for a gas water heater, where a load of the gas water heater is P, a maximum load of the gas water heater is Pmax, a minimum load of the gas water heater is Pmin, and a gas amount entering a premixer is Q2, the larger Q2 is, the larger P is, the larger Pmax corresponds to Q2max, and when Pmin corresponds to Q2min, please refer to fig. 3; assuming that the amount of air entering the premixer is Q1, the greater the opening Ai of the second valve, the greater Q1, see fig. 4; controlling the opening of the air quantity Q1 entering the premixer, wherein if the opening of the air quantity Q1 is larger, the larger the Q1 is, the larger the gas opening of the first valve is, and the larger the Q2 is, please refer to FIG. 5; based on the control principle, the load control method of the gas water heater includes, please refer to fig. 2:
s10, adjusting the opening of the second valve according to the relationship between the opening of the second valve and the load of the gas water heater, and controlling the air quantity entering the premixer from the second valve;
S20: determining the gas quantity in the premixer according to the proportional relation between the air quantity and the gas quantity in the premixer, and adjusting the opening degree of a first valve;
s30: the load of the gas water heater is controlled.
In the embodiment, the control of the load of the gas water heater is realized by performing feedback control on signals of the load of the gas water heater → the air amount (the opening degree of the second valve) → the gas amount (the opening degree of the first valve) → the load of the gas water heater.
An embodiment 3 of the present invention provides a load control method for a gas water heater, where a load of the gas water heater is P, a maximum load of the gas water heater is Pmax, a minimum load of the gas water heater is Pmin, and a gas amount entering a premixer is Q2, the larger Q2 is, the larger P is, the larger Pmax corresponds to Q2max, and when Pmin corresponds to Q2min, please refer to fig. 2; assuming that the opening degree of the second valve is Ai, the maximum opening degree is Amax, and the minimum opening degree is Amin, because the size of the opening degree a of the second valve is controlled by the step number (set as ST) of the stepping motor, the relationship between ST and a is established, assuming that the step number at the position 0 of the stepping motor is ST0, the minimum opening degree Amin corresponds to the position ST0 of the stepping motor, and the maximum opening degree Amax corresponds to the position STmax, the current opening degree a of the second valve is controlled and identified by controlling and identifying the step number ST of the stepping motor, please refer to fig. 3; assuming that the amount of air entering the premixer is Q1, the greater the opening Ai of the second valve, the greater Q1, see fig. 4; assuming that the second valve is a mechanical proportional valve, the opening of the second valve is controlled by controlling the amount of air Q1 entering the premixer under the action of the premixer, for example, if Q1 is larger, Q2 is also larger, see fig. 5; therefore, since P and Q2, Ai and ST, Q1 and Ai, and Q2 and Q1 are related, since the larger a is, the larger Q1 is, the larger Q2 is, and the larger P is, the size of the opening Ai of the second valve is controlled by controlling the step number ST of the stepping motor, so as to adjust and control the amount of air Q1 entering the premixer and the amount of gas Q2 entering the premixer, thereby realizing the control of the load of the gas water heater.
Please refer to fig. 8, which includes:
s11, adjusting the step number of the stepping motor according to the relation between the step number of the stepping motor and the load of the gas water heater;
s21, adjusting the opening of the second valve according to the relation between the step number of the stepping motor and the opening of the adjusting valve and the relation between the opening of the second valve and the load of the gas water heater, and controlling the air quantity entering the premixer from the second valve;
s31: determining the gas quantity in the premixer according to the proportional relation between the air quantity and the gas quantity in the premixer, and adjusting the opening degree of a first valve;
s41: the load of the gas water heater is controlled.
In the present embodiment, the control of the load of the gas water heater is realized by performing feedback control of signals on the load of the gas water heater → the number of steps of the stepping motor → the amount of air (the opening degree of the second valve) → the amount of gas (the opening degree of the first valve) → the load of the gas water heater.
In the specific implementation: and providing a stepping motor for adjusting the opening degree of the second valve, wherein the second valve comprises an adjusting valve, the step number of the stepping motor is matched with the opening degree of the adjusting valve, the step number of the stepping motor and the relation of the load of the gas water heater are determined according to the opening degree of the second valve and the relation of the load of the gas water heater, the step number of the stepping motor is adjusted according to the step number of the stepping motor and the relation of the load of the gas water heater, and the air quantity entering the premixer from the second valve is controlled.
Providing a controller module, the controller module respectively with step motor and first valve signal connection, the controller module still includes the relation of step number and gas heater load of step motor air capacity and gas volume in the premixer and the aperture of first valve with the relation of gas volume in the premixer, through the proportional relation of air volume in the premixer and air volume and gas volume, confirm required gas volume in the premixer, through the aperture of first valve with the relationship of gas volume in the premixer adjusts the aperture of first valve.
The gas heater still include the fan that is used for mixed air and gas, the one end of fan with the premixer intercommunication, the other end of fan with the combustion unit intercommunication, just the fan with controller module signal connection.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A gas water heater, comprising: the gas burner comprises a first valve (3) used for adjusting gas input, a second valve (9) used for adjusting air input, a premixer (6) used for mixing air and gas and a combustion unit (10) used for generating heat, wherein the first valve (3) and the second valve (9) are respectively communicated with the premixer (6) through a pipeline, and the premixer (6) is communicated with the combustion unit (10).
2. Gas water heater according to claim 1, further comprising a first control unit (8) for adjusting the opening of the second valve (9), the first control unit (8) being in signal connection with the second valve (9).
3. Gas water heater according to claim 1, further comprising a fan (5) for mixing air and gas, one end of the fan (5) communicating with the premixer (6) and the other end of the fan (5) communicating with the combustion unit (10).
4. Gas water heater according to claim 3, characterized in that the second valve (9) comprises a regulating valve and the first control unit (8) comprises a step motor, the number of steps of which matches the opening of the regulating valve.
5. Gas water heater according to claim 4, characterized in that it further comprises a controller module (2), said controller module (2) being in signal connection with said first control unit (8), said fan (5) and said first valve (3), respectively.
6. Gas water heater according to claim 5, characterized in that said first valve (3) comprises a proportional valve.
7. A load control method for a gas water heater, comprising: adjusting the opening degree of the second valve according to the relationship between the opening degree of the second valve and the load of the gas water heater, and controlling the air quantity entering the premixer from the second valve; determining the gas quantity in the premixer according to the proportional relation between the air quantity and the gas quantity in the premixer, and adjusting the opening degree of a first valve; the load of the gas water heater is controlled.
8. The load control method for a gas water heater according to claim 7, wherein the opening degree of the second valve is adjusted according to the relationship between the opening degree of the second valve and the load of the gas water heater, and the amount of air entering the premixer from the second valve is controlled by: and providing a stepping motor for adjusting the opening degree of the second valve, wherein the step number of the stepping motor is matched with the opening degree of the second valve, the step number of the stepping motor is determined according to the relation between the step number of the stepping motor and the opening degree of the second valve and the relation between the opening degree of the second valve and the load of the gas water heater, the step number of the stepping motor is adjusted according to the relation between the step number of the stepping motor and the load of the gas water heater, and the air quantity entering the premixer from the second valve is controlled.
9. The load control method for a gas water heater according to claim 8, wherein the gas amount in the premixer is determined according to the ratio of the air amount to the gas amount in the premixer, and the opening degree of the first valve is adjusted, specifically: providing a controller module, the controller module respectively with step motor and first valve signal connection, the controller module still includes the proportional relation of air volume and gas volume in the premixer and the aperture of first valve with the relation of gas volume in the premixer, through the proportional relation of air volume and gas volume in premixer in air volume and the premixer, confirm required gas volume in the premixer, through the aperture of first valve with the relation of gas volume in the premixer adjusts the aperture of first valve.
10. The load control method for the gas water heater according to claim 9, wherein the gas water heater further comprises a blower for mixing air and gas, one end of the blower is communicated with the premixer, the other end of the blower is communicated with the combustion unit, and the blower is in signal connection with the controller module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363625.7A CN111854172A (en) | 2019-04-30 | 2019-04-30 | Gas water heater and load control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363625.7A CN111854172A (en) | 2019-04-30 | 2019-04-30 | Gas water heater and load control method thereof |
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| CN111854172A true CN111854172A (en) | 2020-10-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2454642Y (en) * | 2000-12-07 | 2001-10-17 | 金志刚 | Air-injection gas all-premixing combustion apparatus |
| CN101275774A (en) * | 2007-03-30 | 2008-10-01 | 朱殿臣 | Dynamoelectric proportion valve automatic subsection antifreeze constant temp gas water heater |
| BR102012032334A2 (en) * | 2012-12-18 | 2014-08-26 | Jose Manoel Martins | HEAT PUMP WITH SUBMERSE MOTOR COMPRESSOR |
| CN203907683U (en) * | 2014-05-07 | 2014-10-29 | 邵信宏 | Fully premixed combustion stove |
| CN206514304U (en) * | 2016-12-06 | 2017-09-22 | 南京工业大学 | Adjustable two-stage full-premixing gas stove ejector |
| CN210320689U (en) * | 2019-04-30 | 2020-04-14 | 华帝股份有限公司 | Gas water heater |
-
2019
- 2019-04-30 CN CN201910363625.7A patent/CN111854172A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2454642Y (en) * | 2000-12-07 | 2001-10-17 | 金志刚 | Air-injection gas all-premixing combustion apparatus |
| CN101275774A (en) * | 2007-03-30 | 2008-10-01 | 朱殿臣 | Dynamoelectric proportion valve automatic subsection antifreeze constant temp gas water heater |
| BR102012032334A2 (en) * | 2012-12-18 | 2014-08-26 | Jose Manoel Martins | HEAT PUMP WITH SUBMERSE MOTOR COMPRESSOR |
| CN203907683U (en) * | 2014-05-07 | 2014-10-29 | 邵信宏 | Fully premixed combustion stove |
| CN206514304U (en) * | 2016-12-06 | 2017-09-22 | 南京工业大学 | Adjustable two-stage full-premixing gas stove ejector |
| CN210320689U (en) * | 2019-04-30 | 2020-04-14 | 华帝股份有限公司 | Gas water heater |
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