CN109737484B - Heating system for gas heating water heater and control method thereof - Google Patents
Heating system for gas heating water heater and control method thereof Download PDFInfo
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- 239000008236 heating water Substances 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 title claims abstract description 21
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- 239000007789 gas Substances 0.000 claims description 67
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000002737 fuel gas Substances 0.000 claims description 7
- 244000171022 Peltophorum pterocarpum Species 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
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Abstract
The invention provides a heating system for a gas heating water heater and a control method thereof, the heating system comprises a main controller, a temperature sensor, a water flow sensor, a gas proportional valve and a brushless direct current variable frequency fan, the control method comprises the steps of controlling the opening degree, adjusting the voltage, detecting the rotating speed, stopping abnormally, operating normally and the like, the main controller calculates the required load according to the water flow data and the water temperature data, controls the opening degree of the gas proportional valve and controls the voltage of the brushless direct current variable frequency fan, detects the rotating speed of the brushless direct current variable frequency fan through a speed relay on the brushless direct current variable frequency fan, judges whether the fan is in the normal working state or not through the comparison of the actual rotating speed and the normal rotating speed (according to the L1-L2 curve judgment) so as to judge whether the equipment continues to work or stop working, thereby reducing easily damaged parts such as a bellows, a wind pressure, the production cost is reduced, the after-sale maintenance is reduced, and the overall safety performance and the energy utilization efficiency of the equipment are improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of gas heating water heaters, in particular to a heating system for a gas heating water heater and a control method thereof.
[ background of the invention ]
At present, the power of air supply and exhaust volume of gas heating water heaters sold in the market is from an alternating current fan, and after the specification of the alternating current fan is determined, the heat efficiency of rated load can only be ensured; if the fan is not operated at rated load, the suction force of the fan is not changed, and the load is reduced, so that insufficient combustion of fuel gas and incomplete conversion of generated heat can be generated and the fuel gas is extracted out of the room. And because the airflow monitoring device of the alternating current fan adopts the exhaust pressure detection device, the air pressure fault of the machine is caused by the influences of the external environment, condensed water condensed by an air pressure pipe, pipe blockage in a ripple dune, aging of a wind pressure switch membrane and the like in the using process of the heating stove.
In summary, the gas heating water heater using the ac fan has poor external interference resistance, low utilization rate of sufficient combustion of gas and low thermal efficiency when operating at non-rated power, and corresponding equipment safety and personal safety.
[ summary of the invention ]
The invention aims to provide a heating system for a gas heating water heater and a control method thereof, which can improve the safety performance and the adaptability.
The purpose of the invention is realized as follows:
the utility model provides a heating system for gas heating water heater, includes main control unit, temperature sensor, rivers sensor, gas proportional valve and brushless direct current frequency conversion fan, main control unit locates in the furnace body, temperature sensor locate the delivery port of furnace body and with the main control unit electricity is connected, temperature sensor is used for responding to the leaving water temperature and with corresponding data transfer to main control unit, rivers sensor locate in the furnace body and with the main control unit electricity is connected, rivers sensor be used for detecting discharge and with corresponding data transfer to main control unit, the gas proportional valve locate in the furnace body and with the main control unit electricity is connected, the gas proportional valve is used for adjusting heating efficiency, brushless direct current frequency conversion fan locate the back of furnace body and with the main control unit electricity is connected, main control unit is used for calculating required load and controlling the aperture of gas proportional valve and controlling not have the control to have heating efficiency according to rivers data and temperature data The voltage of the brush direct current frequency conversion fan is arranged, and a speed relay electrically connected with the main controller is arranged on the brush direct current frequency conversion fan and used for detecting the rotating speed of the brush direct current frequency conversion fan and transmitting corresponding rotating speed data to the main controller.
The control method of the heating system for the gas heating water heater comprises the following steps:
a: controlling the opening degree, calculating the required load by the main controller according to the water flow data of the water flow sensor and the water temperature data of the temperature sensor, and adjusting the current of the gas proportional valve according to the load, so as to control the opening degree of the gas proportional valve and adjust the heating efficiency;
b: adjusting the voltage, wherein the main controller adjusts the voltage of the brushless direct current variable frequency fan according to an L1-L2 curve during normal work;
c: detecting the rotating speed, detecting the rotating speed of the brushless direct-current variable-frequency fan by the speed relay and transmitting corresponding data to the main controller, and judging whether the rotating speed of the brushless direct-current variable-frequency fan is normal or not by the main controller according to whether the rotating speed data fall between L1-L2 curves or not;
d: stopping the engine abnormally, and controlling the brushless direct current variable frequency fan and the fuel gas proportional valve to stop working if the main controller judges that the rotating speed of the brushless direct current variable frequency fan is abnormal;
e: and (4) normally operating, judging that the rotating speed of the brushless direct-current variable-frequency fan is normal by the main controller, controlling the brushless direct-current variable-frequency fan and the gas proportional valve to perform combustion operation according to the optimal load, and simultaneously circulating the step C until the target temperature is reached and the stable operation is performed for 25 minutes, and then stopping the operation.
The control method of the heating system for the gas heating water heater as described above is characterized in that the L1-L2 curve in the step B is determined as follows:
f: the method comprises the following steps that low-load operation is carried out, the main controller enables a gas proportional valve to operate under the minimum heat load by adjusting the current of the gas proportional valve, the current PL of the gas proportional valve at the moment is recorded, then the main controller adjusts the voltage of a brushless direct-current frequency conversion fan, the combustion of a gas heating water heater is enabled to be in the optimal state, and the corresponding rotating speed FL of the brushless direct-current frequency conversion fan at the moment is recorded;
g: the smoke blocking port operates, the smoke outlet of the furnace body is artificially blocked, so that the gas heating water heater has obvious yellow flame but does not overflow, and the rotating speed LC of the brushless direct current variable frequency fan is recorded;
h: when the gas heating water heater runs at a rated load, the main controller regulates the current of the gas proportional valve again to enable the gas heating water heater to run under the rated load, records the current PH of the gas proportional valve at the moment, then regulates the voltage of the brushless direct current variable frequency fan to enable the gas heating water heater to be in the optimal running state, and records the corresponding fan rotating speed FH, so that an FL-FH curve, namely an L1 curve is obtained;
i: and (3) operating the secondary smoke blocking port, manually blocking the smoke outlet of the furnace body again to ensure that the gas heating water heater has obvious yellow flame but does not overflow, and recording the rotating speed HC of the brushless direct-current variable-frequency fan at the moment to obtain an LC-HC curve, namely an L2 curve.
Compared with the prior art, the invention has the following technical characteristics:
1. the main controller calculates the required load according to the water flow data and the water temperature data, controls the opening of the gas proportional valve and controls the voltage of the brushless direct current variable frequency fan, detects the rotating speed of the brushless direct current variable frequency fan through a speed relay on the brushless direct current variable frequency fan, judges whether the fan is in a normal working state or not through the comparison of the actual rotating speed and the normal rotating speed (judging according to an L1-L2 curve), and further judges whether the equipment continues to work or stops working or not, so that easily-damaged parts such as a pipe in a dune and a wind pressure switch are reduced, the production cost is reduced, after-sale maintenance is reduced, and the overall safety performance and the energy utilization efficiency of the equipment are improved.
2. The main controller can control the gas proportional valve and the brushless direct current variable frequency fan to work under the state between low load and high load (rated load), thereby improving the application range of the gas heating water heater.
3. And in the normal operation step, the step of detecting the rotating speed is continuously carried out, so that the normal operation of the equipment is ensured constantly.
4. The curves of L1 and L2 are determined according to the optimal combustion state and the combustion state during the limit blockage, and the operation programs corresponding to the curves of L1 and L2 are led into the main controller, so that the assembly of the programs is simplified, and the main controller can conveniently judge the operation state of the brushless direct-current variable-frequency fan.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a logic control block diagram of the present invention;
fig. 2 is a graph of curves L1-L2, i.e., a characteristic curve of fuel gas proportional valve current-brushless dc variable frequency fan speed.
[ detailed description ] embodiments
A heating system for a gas heating water heater comprises a main controller, a temperature sensor, a water flow sensor, a gas proportional valve and a brushless direct current variable frequency fan, wherein the main controller is arranged in a furnace body, the temperature sensor is arranged at a water outlet of the furnace body and is electrically connected with the main controller, the temperature sensor is used for sensing the temperature of outlet water and transmitting corresponding data to the main controller, the water flow sensor is arranged in the furnace body and is electrically connected with the main controller, the water flow sensor is used for detecting the water flow and transmitting corresponding data to the main controller, the gas proportional valve is arranged in the furnace body and is electrically connected with the main controller, the gas proportional valve is used for adjusting the heating efficiency, the brushless direct current variable frequency fan is arranged at the back of the furnace body and is electrically connected with the main controller, the main controller is used for calculating the required load according to the water flow data and the water, the brushless direct current variable frequency fan is provided with a speed relay electrically connected with the main controller for detecting the rotating speed of the brushless direct current variable frequency fan and transmitting corresponding rotating speed data to the main controller. The main controller is Qi Ke QK-JLG220VK020HT, the temperature sensor is Wannuo G18/G1210K beta 3435, the water flow sensor is Wannuo 8.1Q-3, the gas proportional valve is Aikou EBP2008N, and the brushless direct-current variable-frequency fan is ZJ 6325/35W.
The control method of the heating system for the gas heating water heater comprises the following steps:
a: controlling the opening degree, calculating the required load by the main controller according to the water flow data of the water flow sensor and the water temperature data of the temperature sensor, and adjusting the current of the gas proportional valve according to the load, so as to control the opening degree of the gas proportional valve and adjust the heating efficiency;
b: adjusting the voltage, wherein the main controller adjusts the voltage of the brushless direct-current variable-frequency fan according to an L1-L2 curve (shown in figure 2) in normal operation;
c: detecting the rotating speed, detecting the rotating speed of the brushless direct-current variable-frequency fan by the speed relay and transmitting corresponding data to the main controller, and judging whether the rotating speed of the brushless direct-current variable-frequency fan is normal or not by the main controller according to whether the rotating speed data fall between L1-L2 curves or not;
d: stopping the engine abnormally, and controlling the brushless direct current variable frequency fan and the fuel gas proportional valve to stop working if the main controller judges that the rotating speed of the brushless direct current variable frequency fan is abnormal;
e: and (4) normally operating, judging that the rotating speed of the brushless direct-current variable-frequency fan is normal by the main controller, controlling the brushless direct-current variable-frequency fan and the gas proportional valve to perform combustion operation according to the optimal load, and simultaneously circulating the step C until the target temperature is reached and the stable operation is performed for 25 minutes, and then stopping the operation.
The L1-L2 curve in the step B is determined according to the following steps:
f: the method comprises the following steps that low-load operation is carried out, the main controller enables a gas proportional valve to operate under the minimum heat load by adjusting the current of the gas proportional valve, the current PL of the gas proportional valve at the moment is recorded, then the main controller adjusts the voltage of a brushless direct-current frequency conversion fan, the combustion of a gas heating water heater is enabled to be in the optimal state, and the corresponding rotating speed FL of the brushless direct-current frequency conversion fan at the moment is recorded;
g: the smoke blocking port operates, the smoke outlet of the furnace body is artificially blocked, so that the gas heating water heater has obvious yellow flame but does not overflow, and the rotating speed LC of the brushless direct current variable frequency fan is recorded;
h: when the gas heating water heater runs at a rated load, the main controller regulates the current of the gas proportional valve again to enable the gas heating water heater to run under the rated load, records the current PH of the gas proportional valve at the moment, then regulates the voltage of the brushless direct current variable frequency fan to enable the gas heating water heater to be in the optimal running state, and records the corresponding fan rotating speed FH, so that an FL-FH curve, namely an L1 curve is obtained;
i: and (3) operating the secondary smoke blocking port, manually blocking the smoke outlet of the furnace body again to ensure that the gas heating water heater has obvious yellow flame but does not overflow, and recording the rotating speed HC of the brushless direct-current variable-frequency fan at the moment to obtain an LC-HC curve, namely an L2 curve.
Claims (1)
1. A control method of a heating system for a gas-fired water heater, the heating system comprising:
the main controller is arranged in the furnace body;
the temperature sensor is arranged at a water outlet of the furnace body and is electrically connected with the main controller, and the temperature sensor is used for sensing the water outlet temperature and transmitting corresponding data to the main controller;
the water flow sensor is arranged in the furnace body and electrically connected with the main controller, and is used for detecting water flow and transmitting corresponding data to the main controller;
the gas proportional valve is arranged in the furnace body and is electrically connected with the main controller, and the gas proportional valve is used for adjusting the heating efficiency;
the brushless direct current variable frequency fan is arranged at the back of the furnace body and is electrically connected with the main controller, the main controller is used for calculating the required load according to water flow data and water temperature data, controlling the opening of a gas proportional valve and controlling the voltage of the brushless direct current variable frequency fan, and a speed relay electrically connected with the main controller is arranged on the brushless direct current variable frequency fan and is used for detecting the rotating speed of the brushless direct current variable frequency fan and transmitting corresponding rotating speed data to the main controller;
the control method comprises the following steps:
a: controlling the opening degree, calculating the required load by the main controller according to the water flow data of the water flow sensor and the water temperature data of the temperature sensor, and adjusting the current of the gas proportional valve according to the load, so as to control the opening degree of the gas proportional valve and adjust the heating efficiency;
b: adjusting the voltage, wherein the main controller adjusts the voltage of the brushless direct current variable frequency fan according to an L1-L2 curve during normal work;
c: detecting the rotating speed, detecting the rotating speed of the brushless direct-current variable-frequency fan by the speed relay and transmitting corresponding data to the main controller, and judging whether the rotating speed of the brushless direct-current variable-frequency fan is normal or not by the main controller according to whether the rotating speed data fall between L1-L2 curves or not;
d: stopping the engine abnormally, and controlling the brushless direct current variable frequency fan and the fuel gas proportional valve to stop working if the main controller judges that the rotating speed of the brushless direct current variable frequency fan is abnormal;
e: the main controller judges that the rotating speed of the brushless direct-current variable-frequency fan is normal, the brushless direct-current variable-frequency fan and the fuel gas proportional valve are controlled to perform combustion operation according to the optimal load, and meanwhile, the step C is circulated until the target temperature is reached and the stable operation is performed for 25 minutes, and then the machine is stopped;
the L1-L2 curve in the B step is determined as follows:
f: the method comprises the following steps that low-load operation is carried out, the main controller enables a gas proportional valve to operate under the minimum heat load by adjusting the current of the gas proportional valve, the current PL of the gas proportional valve at the moment is recorded, then the main controller adjusts the voltage of a brushless direct-current frequency conversion fan, the combustion of a gas heating water heater is enabled to be in the optimal state, and the corresponding rotating speed FL of the brushless direct-current frequency conversion fan at the moment is recorded;
g: the smoke blocking port operates, the smoke outlet of the furnace body is artificially blocked, so that the gas heating water heater has obvious yellow flame but does not overflow, and the rotating speed LC of the brushless direct current variable frequency fan is recorded;
h: when the gas heating water heater runs at a rated load, the main controller regulates the current of the gas proportional valve again to enable the gas heating water heater to run under the rated load, records the current PH of the gas proportional valve at the moment, then regulates the voltage of the brushless direct current variable frequency fan to enable the gas heating water heater to be in the optimal running state, and records the corresponding fan rotating speed FH, so that an FL-FH curve, namely an L1 curve is obtained;
i: and (3) operating the secondary smoke blocking port, manually blocking the smoke outlet of the furnace body again to ensure that the gas heating water heater has obvious yellow flame but does not overflow, and recording the rotating speed HC of the brushless direct-current variable-frequency fan at the moment to obtain an LC-HC curve, namely an L2 curve.
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| CN110425744B (en) * | 2019-07-20 | 2023-11-24 | 万家乐热能科技有限公司 | Wind pressure control system and control method for full-premix gas heating water heater |
| CN110822723A (en) * | 2019-12-02 | 2020-02-21 | 国惠环保新能源有限公司 | Self-adaptive automatic combustion adjusting system and method for water heater |
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| JPH0810054B2 (en) * | 1989-08-07 | 1996-01-31 | リンナイ株式会社 | Combustor controller |
| JP2002130659A (en) * | 2000-10-26 | 2002-05-09 | Tokyo Gas Co Ltd | Gas burner equipped with air fuel ratio proportional control means |
| CN102778019B (en) * | 2011-05-11 | 2015-05-06 | 宁波帅康热水器有限公司 | Instantaneous gas water heater with accurate temperature control |
| CN105222362B (en) * | 2015-10-29 | 2018-03-16 | 艾欧史密斯(中国)热水器有限公司 | The control system of gas-fired water heater |
| CN106051762A (en) * | 2016-06-08 | 2016-10-26 | 中山市卡洛力热能科技有限公司 | Novel full preheating mixed fuel gas heating system and control method thereof |
| CN106196564A (en) * | 2016-08-31 | 2016-12-07 | 中山市卡洛力热能科技有限公司 | A kind of self-regulation pre-mixing gas combustion heating system and control method thereof |
| CN106931651A (en) * | 2017-04-21 | 2017-07-07 | 中山市樱雪集团有限公司 | Forced-ventilated type gas water heater and control method thereof |
| CN108361996A (en) * | 2018-03-06 | 2018-08-03 | 芜湖美的厨卫电器制造有限公司 | A kind of water heater and water feeding of heater control method |
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