CN109631078B - Gas water heater and fan self-correction control method and control system thereof - Google Patents
Gas water heater and fan self-correction control method and control system thereof Download PDFInfo
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- CN109631078B CN109631078B CN201811394248.5A CN201811394248A CN109631078B CN 109631078 B CN109631078 B CN 109631078B CN 201811394248 A CN201811394248 A CN 201811394248A CN 109631078 B CN109631078 B CN 109631078B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/04—Gaseous fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/04—Heating water
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Abstract
The invention relates to the technical field of intelligent control of a gas water heater, in particular to a gas water heater, a fan self-correction control method and a fan self-correction control system thereof, which respectively monitor the real-time rotating speed of a fan under a minimum rated thermal load working mode and a maximum rated thermal load working mode, compare and analyze the real-time rotating speed and a reference rotating speed, obtain the difference value between the real-time rotating speed and the reference rotating speed, correct the rotating speed of the fan to the range of the reference rotating speed based on the difference value, record the current gear value corresponding to the corrected rotating speed into a main controller, obtain a corrected rotating speed-current curve based on the obtained two-point current gear value, distribute the current gear value of a full load section, ensure that the rotating speed of the fan controlled by optimized fan control current keeps higher consistency with the reference value, thereby eliminating the air volume influence caused by the batch difference of the fan, the adaptability of the gas water heater to the components is improved, and effective guarantee is provided for the performance stability of the gas water heater.
Description
Technical Field
The invention relates to the technical field of intelligent control of gas water heaters, in particular to a gas water heater and a fan self-correction control method and a fan self-correction control system thereof.
Background
At present, the fuel gas is fully combusted under the rated design load of a gas water heater to be matched with the corresponding fuel gas and air demand, and the main controller program stores the current gear values corresponding to the fuel gas proportional valve and the fan in a one-to-one matching mode so as to realize the precise control and allocation of the fuel gas quantity and the air quantity. However, in the actual production process, due to differences caused by different fan manufacturing batches, when the same working current is input to the fan under the same test condition, the output rotating speed of the fan generates large deviation, so that the output air amount generates large deviation, the combustion and emission performance of the water heater is finally influenced, and the high-standard requirement of an outlet product cannot be met. Meanwhile, in actual use, the product can be subjected to insufficient air supply and insufficient external interference resistance caused by the change of smoke exhaust of the water heater or the resistance change of an air supply system due to the change of external conditions, and finally the product performance is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a gas water heater and a fan self-correction control method and a fan self-correction control system thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
provided is a fan self-correction control method of a gas water heater, wherein the gas water heater comprises a fan for adjusting air quantity and a gas proportional valve for adjusting gas quantity, and the control method comprises the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, exiting the adjusting mode; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, acquiring the current gear position value corresponding to the real-time rotating speed falling into the set rotating speed range, and covering the current gear position value in the previous step S10 with the current gear position value;
s40, repeating the steps S10-S30 until the current gear position value in the full load section is corrected.
The fan self-correction control method of the gas water heater corrects the current gear value one by one and covers the original current gear value, and ensures that the rotating speed of the fan controlled by the input current of the optimized fan keeps consistent with the reference rotating speed, thereby eliminating the difference of fan rotating speed signals caused by the difference of the batch of fans and effectively ensuring the requirements of various performances of the gas water heater.
The invention also provides a fan self-correction control method of the gas water heater, the gas water heater comprises a fan for adjusting air quantity and a gas proportional valve for adjusting gas quantity, and the control method comprises the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, go to step S30; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, entering a wind pressure data acquisition mode of the fan, acquiring the real-time wind pressure of the fan, and comparing and judging whether the real-time wind pressure falls into a set wind pressure range: if yes, exiting the adjusting mode; if not, repeating the steps S10-S20 until the real-time wind pressure within the set wind pressure range is obtained;
s40, acquiring the current gear value corresponding to the real-time wind pressure falling into the set wind pressure range, and covering the original current gear value in the step S10 according to the gear value;
s50, repeating the steps S10-S40 until the current gear position value in the full load section is corrected.
The fan self-correction control method of the gas water heater corrects the current gear value one by one and covers the original current gear value, ensures that the rotating speed of the fan controlled by the input current of the optimized fan keeps consistent with the reference rotating speed, and ensures that the wind pressure controlled by the input current of the optimized fan keeps consistent with the set wind pressure range, thereby eliminating the difference of the rotating speed signal and the wind pressure signal of the fan caused by the difference of the batch property of the fan and effectively ensuring the requirements of various properties of the gas water heater.
Preferably, in the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the minimum rated heat load; and acquiring a first current gear value corresponding to the real-time rotating speed falling in the set rotating speed range or the real-time wind pressure falling in the set wind pressure range, and covering the current gear value in the step S10. The heat load of the gas water heater is determined by the gas quantity and the air quantity, and the current input value of the gas proportional valve corresponds to the current input value of the fan one by one.
Preferably, in the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the maximum rated heat load; and acquiring a second current gear value corresponding to the real-time rotating speed falling in the set rotating speed range or the real-time wind pressure falling in the set wind pressure range, and covering the current gear value in the step S10. The heat load of the gas water heater is determined by the gas quantity and the air quantity of the fan together, and the current input value of the gas proportional valve corresponds to the current input value of the fan one by one.
Preferably, in step S40, the current stage value of the full load stage is redistributed based on the first current stage value at the time of the minimum rated thermal load and the second current stage value at the time of the maximum rated thermal load. The rotating speed of the fan is corrected to be within a set rotating speed range under two working modes of minimum rated load and maximum rated load, a corresponding first current gear value and a corresponding second current gear value under the two working modes are obtained, the current gear value of the full-load section is distributed, and the rotating speed of the fan controlled by the newly optimized current gear value of the fan is guaranteed to fall within the set rotating speed range all the time.
Preferably, the set rotating speed range is expressed as real-time rotating speed-reference rotating speed | or reference rotating speed ∈ [0, 3% ], when the rotating speed of the fan is corrected, the rotating speed of the fan is not corrected to the reference rotating speed value, but the error in a certain range is allowed, so that the adjusting difficulty is reduced while the consistency of the rotating speed of the fan controlled by the input current of the fan and the reference value is ensured.
The invention also provides a fan self-correction control system of the gas water heater, which comprises a main controller, a fan power supply module, a fan control module, a current feedback module, a rotating speed feedback module and a regulating device, wherein the main controller comprises:
the main controller acquires a rotating speed signal of the fan through a rotating speed feedback module, and acquires a current signal of the fan through a current feedback module; the main controller is provided with a comparison and judgment module for comparing and judging the real-time rotating speed and the reference rotating speed;
the input end of the fan power supply module is connected to the output end of the main controller, and the output end of the fan power supply module is connected to the input end of the fan;
the input end of the fan control module is connected to the output end of the main controller, and the output end of the fan control module is connected to the input end of the fan;
the adjusting device is electrically connected with the main controller.
The fan self-correction control system of the gas water heater adjusts the gas quantity entering from the gas proportional valve, adjusts the current gear value of the fan according to the gas quantity to adjust the input current value of the fan, and the input current value is fed back to the main controller in real time through the current feedback module; entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan by the main controller through a rotating speed feedback module, and comparing and analyzing the real-time rotating speed and a set rotating speed range through a comparison and judgment module; if the real-time rotating speed is not in the set rotating speed range, adjusting the input current value of the fan through an adjusting device according to the difference value between the real-time rotating speed and the reference rotating speed until the real-time rotating speed received by the main controller falls into the set rotating speed range, and storing the current gear value at the moment; then, obtaining and storing a plurality of current gear values in the full load section in the same method; the main controller covers the original current gear values one by one according to the stored current gear values, and the high consistency of the rotating speed of the fan controlled by the optimized fan control current and a reference value is guaranteed.
Furthermore, the adjusting device comprises a display device for displaying the rotating speed signal and the current signal, a current gear adjusting device for adjusting the input current value of the fan and a gas adjusting device for adjusting the gas quantity entering the gas proportional valve. The display device can visually display real-time rotating speed and real-time current signals, the current gear adjusting device can conveniently adjust the input current of the gas water heater, and the gas adjusting device can conveniently adjust the gas quantity of the gas water heater.
Further, the main controller comprises a storage module connected with the main controller and used for storing real-time current and real-time rotating speed. The storage module can store the real-time current and the real-time rotating speed of the fan in the current batch, and researchers draw a rotating speed-current curve according to historical data to provide a data base for performance research of the gas water heater. The fan of the present invention is preferably, but not limited to, a brushless dc fan. The reference rotating speed of the brushless direct current fan is n =60 x f/p, n is the rotating speed of the fan and is in the unit of r/min, f is the frequency of the fan and is in the unit of Hz, and p is the number of pole pairs of the fan. The invention also provides a gas water heater comprising the fan self-correction control system.
The gas water heater can ensure that the air quantity required by combustion of the gas water heater at each load point and load section is consistent with a reference design value, can eliminate the difference of fan rotating speed signals caused by the difference among fan batches, and can effectively ensure the requirements of various performances of the gas water heater.
Compared with the prior art, the invention has the beneficial effects that:
according to the gas water heater and the fan self-correction control method and the fan self-correction control system thereof, the rotating speed of the fan in the adjusting mode of the gas water heater is corrected to be within the set range, the corresponding fan control current gear value is recorded into the main controller, the current gear value of the full load section is distributed, and the rotating speed of the fan controlled by the optimized fan control current is ensured to be kept in higher consistency with the reference value, so that the air volume influence caused by the batch difference of the fan is eliminated, the adaptability of the gas water heater to components is improved, and effective guarantee is provided for the stable performance of the gas water heater.
Drawings
Fig. 1 is a flowchart of a fan self-correction control method of a gas water heater according to an embodiment.
Fig. 2 is a flowchart of a fan self-correction control method of a gas water heater according to a second embodiment.
Fig. 3 is a schematic structural diagram of a fan self-correction control system of a gas water heater according to a third embodiment.
Fig. 4 is a schematic structural diagram of a fan self-correction control system of a gas water heater according to a fourth embodiment.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example one
Fig. 1 shows an embodiment of a fan self-correction control method for a gas water heater according to the present invention, where the gas water heater includes a fan for adjusting an air amount and a gas proportional valve for adjusting a gas amount, and the control method includes the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, exiting the adjusting mode; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, acquiring the current gear position value corresponding to the real-time rotating speed falling into the set rotating speed range, and covering the current gear position value in the previous step S10 with the current gear position value;
s40, repeating the steps S10-S30 until the current gear position value in the full load section is corrected.
In the implementation of the embodiment, the rotation speed of the fan is not corrected to the reference rotation speed value, but an error in a certain range is allowed, which is expressed as | -real-time rotation speed-reference rotation speed |/reference rotation speed ∈ [0, 3% ], and the current gear value is corrected one by one and covers the original current gear value, so that the rotation speed of the fan controlled by the input current of the optimized fan is ensured to be consistent with the reference rotation speed, thereby eliminating the difference of fan rotation speed signals caused by the difference of the batch property of the fan and effectively ensuring the requirements of various properties of the gas water heater.
The embodiment is a simplified fan self-correction control method, and can correct the fan rotating speed in the working modes at the two ends of the maximum rated load and the minimum rated load and then distribute the current gear value in the full-load section. Specifically, the method comprises the following steps: in the step S10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the minimum rated heat load; in step S30, the first current range value corresponding to the real-time rotation speed falling within the set rotation speed range is acquired, and the current range value in step S10 is covered thereby. In the step S10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the maximum rated heat load; in step S30, the second current range value corresponding to the real-time rotation speed falling within the set rotation speed range is acquired, and the current range value in step S10 is covered thereby. In step S40, the current stage value of the full load stage is redistributed based on the first current stage value at the time of the minimum rated thermal load and the second current stage value at the time of the maximum rated thermal load. The rotating speed of the fan is corrected to be within a set rotating speed range under two working modes of minimum rated load and maximum rated load, a corresponding first current gear value and a corresponding second current gear value under the two working modes are obtained, the current gear value of the full-load section is distributed, and the rotating speed of the fan controlled by the newly optimized current gear value of the fan is ensured to fall within a rotating speed reference range all the time.
Example two
Fig. 2 shows an embodiment of a fan self-correction control method for a gas water heater according to the present invention, where the gas water heater includes a fan for adjusting an air amount and a gas proportional valve for adjusting a gas amount, and the control method includes the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, go to step S30; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, entering a wind pressure data acquisition mode of the fan, acquiring the real-time wind pressure of the fan, and comparing and judging whether the real-time wind pressure falls into a set wind pressure range: if yes, exiting the adjusting mode; if not, repeating the steps S10-S20 until the real-time wind pressure within the set wind pressure range is obtained;
s40, acquiring the current gear value corresponding to the real-time wind pressure falling into the set wind pressure range, and covering the original current gear value in the step S10 according to the gear value; in the embodiment, the set wind pressure range is that the variable wind pressure value within 3 s-10 s exceeds 3 Pa-15 Pa;
s50, repeating the steps S10-S40 until the current gear position value in the full load section is corrected.
The embodiment is to simplify a fan self-correction control method, correct the rotating speed and the wind pressure of the fan under the working modes of the maximum rated load and the minimum rated load, and then distribute the current gear value in the full load section. Specifically, the method comprises the following steps: in the step S10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the minimum rated heat load; in step S40, a first current gear value corresponding to the real-time wind pressure falling within the set wind pressure range is obtained, and the current gear value in step S10 is covered thereby. In the step S10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from the gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the maximum rated heat load; in step S40, a second current gear value corresponding to the real-time wind pressure falling within the set wind pressure range is obtained, and the current gear value in step S10 is covered thereby. In step S50, the current stage value of the full load stage is redistributed based on the first current stage value at the time of the minimum rated thermal load and the second current stage value at the time of the maximum rated thermal load. The rotating speed of the fan is corrected to be within a set rotating speed range under two working modes of minimum rated load and maximum rated load, a corresponding first current gear value and a corresponding second current gear value under the two working modes are obtained, the current gear value of the full-load section is distributed, and the rotating speed and the wind pressure controlled by the newly optimized fan current gear value are ensured to fall within a set reference rotating speed range and a set wind pressure range all the time.
EXAMPLE III
Fig. 3 shows a fan self-correction control system of a gas water heater according to the present invention, which includes a main controller, a fan power supply module, a fan control module, a current feedback module, a rotation speed feedback module, and an adjusting device:
the main controller acquires a rotating speed signal of the fan through the rotating speed feedback module, and acquires a current signal of the fan through the current feedback module; the main controller is provided with a comparison and judgment module for comparing and judging the real-time rotating speed and the reference rotating speed;
the input end of the fan power supply module is connected with the output end of the main controller, and the output end of the fan power supply module is connected with the input end of the fan;
the input end of the fan control module is connected with the output end of the main controller, and the output end of the fan control module is connected with the input end of the fan;
the adjusting device is electrically connected with the main controller.
In the embodiment, after the gas water heater enters the adjusting mode, the gas quantity entering from the gas proportional valve is adjusted, the current gear value of the fan is adjusted according to the gas quantity so as to adjust the input current value of the fan, and the input current value is fed back to the main controller in real time through the current feedback module; entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan by the main controller through a rotating speed feedback module, and comparing and analyzing the real-time rotating speed and a set rotating speed range through a comparison and judgment module; if the real-time rotating speed is not in the set rotating speed range, adjusting the input current value of the fan through an adjusting device according to the difference value between the real-time rotating speed and the reference rotating speed until the real-time rotating speed received by the main controller falls into the set rotating speed range, and storing the current gear value at the moment; then, obtaining and storing a plurality of current gear values in the full load section in the same method; the main controller covers the original current gear values one by one according to the stored current gear values, and the high consistency of the rotating speed of the fan controlled by the optimized fan control current and a reference value is guaranteed. The adjusting device comprises a display device for displaying a rotating speed signal and a current signal, a current gear adjusting device for adjusting the input current value of the fan and a gas adjusting device for adjusting the gas quantity entering the gas proportional valve; the display device can display the real-time rotating speed and the real-time current signal visually, the current gear adjusting device can adjust the input current of the gas water heater conveniently, and the gas adjusting device can adjust the gas quantity of the gas water heater conveniently.
In the present embodiment, the current gear position value adopts a 16-ary algorithm, and the letters A, B, C, D, E, F represent 10, 11, 12, 13, 14, and 15 digits, respectively, and when the gear position value is 6C code, the specific input current value represented by the letter is 6x16+12= 108.
The main controller comprises a storage module connected with the main controller and used for storing real-time current and real-time rotating speed, the real-time current and the real-time rotating speed of the fan in the current batch are stored, and researchers can fetch historical data to draw a rotating speed-current curve and provide a data base for performance research of the gas water heater.
The fan in this embodiment is a brushless dc fan, the reference rotation speed is n =60 × f/p, n is the fan rotation speed in r/min, f is the fan frequency in Hz, and p is the pole pair number of the fan. The relation between the fan frequency and the input current value is known for the brushless direct current fan with the known model, and the relation between the reference rotating speed and the input current value can be deduced; therefore, the reference rotating speed can be simply calculated according to the input current value of the fan during correction.
Example four
Fig. 4 shows an embodiment of a fan self-correction control system of a gas water heater according to the present invention, which is similar to the third embodiment, and the difference is that the fan self-correction control system further includes a wind pressure feedback module, a temperature sensing module, and a flow sensing module, the main controller obtains a wind pressure signal of the fan through the wind pressure feedback module, obtains an outlet water temperature and an inlet water temperature through the temperature sensing module, and obtains a real-time water flow through the flow sensing module. The sample connection of wind pressure feedback module and the wind pressure sample connection intercommunication of fan, the wind pressure change of wind pressure feedback module perception fan sample connection department and transmit the wind pressure signal for main control unit with corresponding electrical frequency signal conversion: when the air pressure signal is changed within 3 s-10 s and exceeds 3 Pa-15 Pa, the main controller adjusts the input current value of the fan according to the collected set temperature, the collected outlet water temperature, the collected inlet water temperature, the collected real-time water flow and the collected current value of the gas proportional valve to perform real-time compensation adjustment of the air pressure so that the water heater can stably work under the optimal working condition, the fan self-compensation is suitable for the use of consumers, and the comfort experience degree of the consumers is improved.
EXAMPLE five
The embodiment is the embodiment of the gas water heater comprising the fan self-correction system of the gas water heater, the air quantity required by combustion at each load point and load section is consistent with the reference design value, the difference of fan rotating speed signals caused by the difference among fan batches can be eliminated, and the requirements of various performances of the gas water heater are effectively met.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A fan self-correction control method of a gas water heater, wherein the gas water heater comprises a fan for adjusting air quantity and a gas proportional valve for adjusting gas quantity, the control method is characterized by comprising the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from a gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, exiting the adjusting mode; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, acquiring a current gear position value corresponding to the real-time rotating speed falling into the set rotating speed range, and covering the current gear position value in the previous step S10 with the current gear position value;
s40, repeating the steps S10-S30 until the current gear position value in the full load section is corrected;
under the regulation mode of the gas water heater, regulating the gas quantity entering from the gas proportional valve, and regulating the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the maximum rated heat load; acquiring a first current gear value corresponding to the real-time rotating speed falling into the set rotating speed range, and covering the original current gear value in the step;
under the regulation mode of the gas water heater, regulating the gas quantity entering from the gas proportional valve, and regulating the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the minimum rated heat load; acquiring a second current gear value corresponding to the real-time rotating speed falling into the set rotating speed range, and covering the original current gear value;
the current stage value of the full load stage is redistributed based on the first current stage value at the maximum rated thermal load and the second current stage value at the minimum rated thermal load.
2. A fan self-correction control method of a gas water heater, wherein the gas water heater comprises a fan for adjusting air quantity and a gas proportional valve for adjusting gas quantity, the control method is characterized by comprising the following steps:
s10, under the adjusting mode of the gas water heater, adjusting the gas quantity entering from a gas proportional valve, and adjusting the current gear value of the fan according to the gas quantity to adjust the input current value of the fan;
s20, entering a fan rotating speed data acquisition mode, acquiring the real-time rotating speed of the fan, and comparing and judging whether the real-time rotating speed falls into a set rotating speed range: if yes, go to step S30; if not, adjusting the input current value of the fan according to the difference value of the real-time rotating speed and the reference rotating speed until the real-time rotating speed within the set rotating speed range is obtained;
s30, entering a wind pressure data acquisition mode of the fan, acquiring the real-time wind pressure of the fan, and comparing and judging whether the real-time wind pressure falls into a set wind pressure range: if yes, exiting the adjusting mode; if not, repeating the steps S10-S20 to obtain the real-time wind pressure within the set wind pressure range;
s40, acquiring a current gear value corresponding to real-time wind pressure falling into a set wind pressure range, and covering the original current gear value in the step S10 according to the gear value;
s50, repeating the steps S10-S40 until the current gear position value in the full load section is corrected;
under the regulation mode of the gas water heater, regulating the gas quantity entering from the gas proportional valve, and regulating the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the maximum rated heat load; acquiring a first current gear value corresponding to real-time rotating speed falling into a set rotating speed range and real-time wind pressure falling into a set wind pressure range, and covering the original current gear value in the step;
under the regulation mode of the gas water heater, regulating the gas quantity entering from the gas proportional valve, and regulating the current gear value of the fan according to the gas quantity until the heat load of the gas water heater reaches the minimum rated heat load; acquiring a second current gear value corresponding to real-time rotating speed falling into a set rotating speed range and real-time wind pressure falling into a set wind pressure range, and covering the original current gear value;
the current stage value of the full load stage is redistributed based on the first current stage value at the maximum rated thermal load and the second current stage value at the minimum rated thermal load.
3. The fan self-correction control method for gas water heater according to claim 1 or 2, characterized in that said set rotation speed range represents | real-time rotation speed-reference rotation speed | reference rotation speed ∈ [0, 3% ].
4. A control system applying the fan self-correction control method of the gas water heater as claimed in claim 2 is characterized by comprising a main controller, a fan power supply module, a fan control module, a current feedback module, a rotating speed feedback module and a regulating device:
the main controller acquires a rotating speed signal of the fan through a rotating speed feedback module, and acquires a current signal of the fan through a current feedback module; the main controller is provided with a comparison and judgment module for comparing and judging the real-time rotating speed and the reference rotating speed;
the input end of the fan power supply module is connected to the output end of the main controller, and the output end of the fan power supply module is connected to the input end of the fan;
the input end of the fan control module is connected to the output end of the main controller, and the output end of the fan control module is connected to the input end of the fan;
the adjusting device is electrically connected with the main controller;
the adjusting device comprises a display device for displaying a rotating speed signal and a current signal, a current gear adjusting device for adjusting the input current value of the fan and a gas adjusting device for adjusting the gas quantity entering the gas proportional valve;
the main controller comprises a storage module connected with a control module for storing real-time current and real-time rotating speed;
the system also comprises a wind pressure feedback module, a temperature sensing module and a flow sensing module, wherein the main controller acquires a wind pressure signal of the fan through the wind pressure feedback module, acquires the water outlet temperature and the water inlet temperature through the temperature sensing module and acquires the real-time water flow through the flow sensing module; the sampling port of the wind pressure feedback module is communicated with the wind pressure sampling port of the fan, and the wind pressure feedback module senses the wind pressure change at the sampling port of the fan and converts a wind pressure signal into a corresponding electrical frequency signal to be transmitted to the main controller.
5. A gas water heater comprising the control system of claim 4.
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| CN112212357A (en) * | 2019-07-09 | 2021-01-12 | 深圳市合信达控制系统有限公司 | Gas quantity control method, gas wall-mounted furnace, gas water heater and heating and ventilation system |
| CN110553280B (en) * | 2019-09-11 | 2020-12-15 | 兖矿集团有限公司 | Control method and system for hot air stove and storage medium |
| CN111550928A (en) * | 2020-04-17 | 2020-08-18 | 深圳市合信达控制系统有限公司 | Control method and device for fan rotating speed, computer equipment and readable storage equipment |
| CN111578523B (en) * | 2020-04-30 | 2021-11-09 | 广东万和新电气股份有限公司 | Water heater wind pressure value adjusting method and device, computer equipment and storage medium |
| CN113586500B (en) * | 2020-04-30 | 2023-06-20 | 芜湖美的厨卫电器制造有限公司 | Fan control method, controller and water heater |
| CN111964269B (en) * | 2020-07-27 | 2022-01-11 | 广东万和新电气股份有限公司 | Gas water heater and automatic judgment and control method for rotating speed precision of fan of gas water heater |
| CN112460744A (en) * | 2020-10-20 | 2021-03-09 | 华帝股份有限公司 | Debugging method of kitchen air conditioner |
| CN113154688B (en) * | 2021-04-21 | 2022-09-13 | 瑞美(中国)热水器有限公司 | Control method of full-premixing condensing type gas positive displacement water heater and water heater |
| CN113156866A (en) * | 2021-05-07 | 2021-07-23 | 合肥美菱物联科技有限公司 | Refrigerator fan control circuit and control method thereof |
| CN113898948B (en) * | 2021-10-18 | 2023-05-30 | 东莞市艾瑞科热能设备有限公司 | Sectional combustion balance control method of burner, burner and wall-mounted furnace |
| CN114877461B (en) * | 2022-06-15 | 2024-03-15 | 中山大洋电机股份有限公司 | Control method of ventilation module, fresh air conditioner and fresh air conditioning device |
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| 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 |
| KR20170069406A (en) * | 2015-12-11 | 2017-06-21 | 롯데알미늄 주식회사 | Gas boiler and gas sonsumption detect and display method thereof |
| CN105841353B (en) * | 2016-03-30 | 2019-02-12 | 成都前锋电子有限责任公司 | A kind of gas heater and its control method of width adaptation range |
| CN106885378B (en) * | 2017-03-31 | 2020-09-25 | 广东万和新电气股份有限公司 | Wind pressure resistant control system of gas water heater |
| CN107101381B (en) * | 2017-05-06 | 2023-07-18 | 广东万家乐燃气具有限公司 | Gas water heater with gas pressure sensor and control system thereof |
| CN107575412B (en) * | 2017-09-04 | 2019-08-16 | 珠海格力电器股份有限公司 | Blower control method, controller of fan and wall-hung boiler |
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