CN111692610A - Fan control method, heat exchange structure and gas water heater - Google Patents
Fan control method, heat exchange structure and gas water heater Download PDFInfo
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- CN111692610A CN111692610A CN202010554645.5A CN202010554645A CN111692610A CN 111692610 A CN111692610 A CN 111692610A CN 202010554645 A CN202010554645 A CN 202010554645A CN 111692610 A CN111692610 A CN 111692610A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 32
- 239000000779 smoke Substances 0.000 claims description 21
- 239000003517 fume Substances 0.000 claims description 6
- 230000001186 cumulative effect Effects 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 28
- 239000003546 flue gas Substances 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002918 waste heat Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
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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
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a fan control method, a heat exchange structure and a gas water heater, wherein the fan control method comprises the following steps: recording respective accumulated working time of a plurality of fans for air draft; when the burner is in a small fire state, comparing the accumulated working time of the fan, and starting the fan with the shortest accumulated working time; and when the combustor is in a big fire state, at least two fans are started. Above-mentioned fan control method, when the combustor is in big fire state, increase the quantity of fan, improve the suction volume to the air, make the burning of gas more abundant, release more heats, increase the suction power to the high temperature flue gas, improve the heat transfer effect, and then increase holistic thermal efficiency, simultaneously under little fire state, open through selecting the fan that accumulative total operating time is shorter, make the accumulative total operating time of each fan close, can prevent that the life of certain fan from longer leading to earlier breaking down, the life of extension fan.
Description
Technical Field
The invention relates to the technical field of household equipment, in particular to a fan control method, a heat exchange structure and a gas water heater.
Background
The gas water heater mainly generates high-temperature flue gas by burning gas, heats the water pipe through heat exchange, and the high-temperature flue gas is discharged through the fan after the heat exchange. In the heat exchange process of the gas water heater, due to insufficient combustion and heat exchange, the overall heat efficiency is affected, energy waste is caused, and the service life of the fan is short.
Disclosure of Invention
Based on the above, the invention provides a fan control method, a heat exchange structure and a gas water heater, which can improve the heat efficiency and prolong the service life of the fan, so as to overcome the defects of the prior art.
The technical scheme is as follows:
a fan control method comprises the following steps:
recording respective accumulated working time of a plurality of fans for air draft;
when the burner is in a small fire state, comparing the accumulated working time of the fan, and starting the fan with the shortest accumulated working time;
and when the combustor is in a big fire state, at least two fans are started.
The fan control method comprises the steps of exhausting air through a plurality of fans to enable air to be sucked for gas combustion and then exhausted after heat exchange, when a combustor is in a small fire state, the combustion gas quantity is small, only a single fan needs to be started to suck sufficient air and exhaust heat-exchanged smoke, when the combustor is in a large fire state, the combustion gas quantity is increased, the number of the fans is correspondingly increased, the air suction quantity is increased, the combustion of the gas is more sufficient, more heat is released, at least two fans are started simultaneously to increase the suction force to the high-temperature smoke, the high-temperature smoke formed after combustion can pass through a heat exchange part more smoothly, the heat exchange effect is improved, the overall heat efficiency is further increased, and meanwhile, in the small fire state, the accumulated working time of each fan is close by selecting the fan with shorter accumulated working time to be started, can prevent that the life of certain fan from longer leading to earlier breaking down, prolong the life of fan.
In one embodiment, when the burner is in the low flame state, the method further comprises the following steps:
and if the fan with the shortest accumulated working time breaks down, switching another fan to work.
In one embodiment, the number of the fans is two, and when the burner is in a small fire state, if the accumulated working time of the two fans is equal, one of the fans is selected to be started.
In one embodiment, if the accumulated working time of the two fans is equal again, the other fan is selected to be started.
A heat exchange structure applying the fan control method comprises a shell, a fan, a combustor and a heat exchanger, wherein a first air channel is formed in the shell, the combustor and the heat exchanger are arranged in the first air channel, the number of the fans is at least two, and the fans are used for exhausting air in the first air channel.
Above-mentioned heat exchange structure, the combustor is used for burning gas and generates high temperature flue gas, and carry out the heat exchange through the heat exchanger, the fan can take first wind channel out with the flue gas after the heat transfer, can be according to the quantity of opening of the firepower adjustment fan of combustor, when the firepower of combustor is less, can open a fan, can satisfy the demand, when the firepower of combustor is great, it can provide bigger suction force to open two at least fans simultaneously, make more air get into the burning that is used for participating in the gas in the first wind channel, release more heats, and the high temperature flue gas that forms after the burning can be more smooth through the heat transfer part, improve the heat transfer effect, and then increase holistic thermal efficiency.
In one embodiment, the number of the fans is two, the two fans are respectively a first fan and a second fan, a second air duct and a third air duct are further arranged in the shell, the second air duct and the third air duct are respectively communicated with the first air duct, the first fan is used for exhausting the second air duct, the second fan is used for exhausting the third air duct, the second air duct and the third air duct are arranged side by side, and the second air duct and the third air duct are arranged on one side, away from the burner, of the heat exchanger.
In one embodiment, the housing includes a main body and a smoke collecting cover connected to each other, the first air duct is disposed in the main body, the second air duct and the third air duct are disposed in the smoke collecting cover, an inlet is disposed on the smoke collecting cover, the inlet is communicated with the first air duct, and the second air duct and the third air duct are respectively communicated with the inlet.
In one embodiment, the fume collecting hood comprises a hood body, a first split body and a second split body, the inlet is arranged in the hood body, the second air duct is arranged in the first sub-body, the third air duct is arranged in the second sub-body, the first sub-body comprises a first guide part and a first air exhaust part which are arranged along the second air channel in sequence, the second split body comprises a second guide part and a second air exhaust part which are sequentially arranged along the third air channel, the first guide part and the second guide part are connected with the cover body, the first air exhaust part is arranged on one side of the first guide part far away from the second guide part, the impeller of first fan is located first induced draft portion, second induced draft portion is located the second guide portion is kept away from one side of first guide portion, the impeller of second fan is located second induced draft portion.
In one embodiment, the first guide portion is disposed adjacent to an inner wall of the second guide portion that is inclined with respect to a vertical plane, and the second guide portion is disposed adjacent to an inner wall of the first guide portion that is inclined with respect to a vertical plane.
A gas water heater comprising a heat exchange structure as claimed in any one of the preceding claims.
Above-mentioned gas heater, the combustor is used for burning the gas and generates high temperature flue gas, and carry out the heat exchange through the heat exchanger, first fan, the second fan can take the flue gas after the heat exchange out first wind channel, can be according to the first fan of firepower adjustment of combustor, the quantity of opening of second fan, when the firepower of combustor is less, can open first fan or second fan, can satisfy the demand, when the firepower of combustor is great, can provide bigger suction when first fan and second fan are opened simultaneously, make more air get into and be used for participating in the burning of gas in the first wind channel, release more heats, and the high temperature flue gas that forms after the burning can be more smooth through the heat transfer part, improve the heat transfer effect, and then increase holistic thermal efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and are not intended to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a fan control method according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a heat exchange structure according to an embodiment of the present invention;
fig. 3 is an assembly schematic diagram of the smoke collecting hood, the first fan and the second fan according to the embodiment of the invention.
Description of reference numerals:
100. the gas-fired boiler comprises a shell, 101, a first air duct, 102, a second air duct, 103, a third air duct, 110, a main body, 120, a smoke collecting hood, 121, an inlet, 122, a hood body, 123, a first split body, 123a, a first guide part, 123b, a first air suction part, 124, a second split body, 124a, a second guide part, 124b, a second air suction part, 200, a fan, 210, a first fan, 220, a second fan, 300, a combustor, 400, a heat exchanger, 500, a control box, 600 and a gas regulating valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
The embodiment discloses a fan control method, which comprises the following steps:
recording respective accumulated working time of a plurality of fans for air draft;
when the burner is in a small fire state, comparing the accumulated working time of the fan, and starting the fan with the shortest accumulated working time;
and when the combustor is in a big fire state, at least two fans are started.
The fan control method comprises the steps of exhausting air through a plurality of fans to enable air to be sucked for gas combustion and then exhausted after heat exchange, when a combustor is in a small fire state, the combustion gas quantity is small, only a single fan needs to be started to suck sufficient air and exhaust heat-exchanged smoke, when the combustor is in a large fire state, the combustion gas quantity is increased, the number of the fans is correspondingly increased, the air suction quantity is increased, the combustion of the gas is more sufficient, more heat is released, at least two fans are started simultaneously to increase the suction force to the high-temperature smoke, the high-temperature smoke formed after combustion can pass through a heat exchange part more smoothly, the heat exchange effect is improved, the overall heat efficiency is further increased, and meanwhile, in the small fire state, the accumulated working time of each fan is close by selecting the fan with shorter accumulated working time to be started, can prevent that the life of certain fan from longer leading to earlier breaking down, prolong the life of fan.
Alternatively, the burner may have various forms, for example, the burner may adjust the output of the gas, and when the output of the gas is small, the burner is in a low-fire state, and when the output of the gas is large, the burner is in a high-fire state;
or the burner is provided with two fire rows, when only one of the fire rows is ignited, the burner is in a small fire state, and when the two fire rows are ignited, the burner is in a big fire state;
or the burner is provided with at least three fire rows, when the number of the ignited fire rows is less than half of the total number of the fire rows, the burner is in a small fire state, and when the number of the ignited fire rows is more than or equal to half of the total number of the fire rows, the burner is in a large fire state.
In this embodiment, there are 6 fire rows in the burner, and the number of fire rows opened is 2 or 4 or 6, and then the corresponding 2 fire rows are under small load when opened, that is, the burner is in a low fire state, and then the burner is under large load when 4 or 6 fire rows are opened, that is, the burner is in a high fire state.
In one embodiment, when the burner is in the low flame state, the method further comprises the following steps:
and if the fan with the shortest accumulated working time breaks down, switching another fan to work.
Even the fan broke down this moment, through switching another fan work, still can ensure that the smooth flue gas that admits air and produce after the burning of burning in time discharges, does not influence the use, and can prevent the flue gas gathering, guarantees safe in utilization.
In one embodiment, the number of the fans is two, and when the burner is in a small fire state, if the accumulated working time of the two fans is equal, one of the fans is selected to be started.
When one of the two fans needs to be selected to be started, one fan is selected to be started first, the accumulated working time of the started fan is changed immediately, and the started fan can be selected continuously according to the length of the accumulated working time.
In other embodiments, when the number of the fans is greater than or equal to three and the burner is in a big fire state, the number of the fans started is in direct proportion to the number of the burners started, and the cumulative working time of the started fans is shorter. For example, the number of the fans is three, the burner comprises six fire rows, when the burner is started to be at three or more fire rows, the burner is in a big fire state, the fire rows are generally started in even number, namely the number of the fire rows can be two, four or six, if the number of the fire rows is four, the number of the fans is two, and if the number of the fire rows is six, the number of the fans is three.
In one embodiment, if the accumulated working time of the two fans is equal again, the other fan is selected to be started. When one fan needs to be selected to be started again, the other fan is selected to be started according to the previous treatment under the same condition, so that the working conditions of different fans are further similar, and the two fans are effectively combined for use.
As shown in fig. 2 and fig. 3, an embodiment discloses a heat exchange structure applying the above fan control method, which includes a housing 100, fans 200, a burner 300 and a heat exchanger 400, wherein a first air duct 101 is arranged in the housing 100, the burner 300 and the heat exchanger 400 are both arranged in the first air duct 101, at least two fans 200 are provided, and the fans 200 are both used for exhausting air to the first air duct 101.
Above-mentioned heat exchange structure, combustor 300 is used for burning the gas and generates high temperature flue gas, and carry out the heat exchange through heat exchanger 400, first wind channel 101 can be taken out with the flue gas after the heat exchange to fan 200, can be according to the number of opening of the firepower adjustment fan 200 of combustor 300, when the firepower of combustor 300 is less, can open a fan 200, can satisfy the demand, when the firepower of combustor 300 is great, it can provide bigger suction force to open at least two fans 200 simultaneously, make more air get into and be used for participating in the burning of gas in the first wind channel 101, release more heats, and the high temperature flue gas that forms after the burning can be more smooth through the heat transfer part, and the heat transfer effect is improved, and then whole thermal efficiency is increased.
In addition, when two at least fans 200 open simultaneously, the wind pressure increase in the first wind channel 101, the condition that reducible high temperature flue gas passes through by heat exchanger 400 both sides makes the high temperature flue gas can be more carry out the heat transfer through heat exchanger 400, improves heat exchange efficiency.
Optionally, the heat exchange structure further includes a controller and a timer, the timer is configured to record respective accumulated operating time of the wind power 200, the controller is electrically connected to the timer, the controller is configured to receive a small fire signal or a large fire signal, when the controller receives the small fire signal, the controller controls the combustor 300 to be in the small fire state, the controller receives data of the timer and controls the fan 200 with the shortest accumulated operating time to be turned on, when the controller receives the large fire signal, the controller controls the combustor 300 to be in the large fire state, and the controller controls at least two fans 200 to be turned on simultaneously. At this time, when the combustor 300 is in a low-fire state, the fan 200 with the shortest accumulated working time can be controlled to be started, the working time of different fans 200 is averaged, the occurrence time of initial failure is delayed, the frequency of failure and maintenance and replacement is reduced, and when the combustor 300 is in a high-fire state, the two fans 200 are simultaneously started, so that the combustion and the emission of smoke are more sufficient.
Optionally, as shown in fig. 2, the heat exchange structure further includes a control box 500, and the controller and the timer are both disposed in the control box 500.
In one embodiment, as shown in fig. 2, the number of the fans 200 is two, the two fans 200 are respectively a first fan 210 and a second fan 220, the housing 100 is further provided with a second air duct 102 and a third air duct 103, the second air duct 102 and the third air duct 103 are respectively communicated with the first air duct 101, the first fan 210 is used for drawing air in the second air duct 102, the second fan 220 is used for drawing air in the third air duct 103, the second air duct 102 and the third air duct 103 are arranged side by side, and the second air duct 102 and the third air duct 103 are arranged on one side of the heat exchanger 400 far away from the burner 300. At this moment, high-temperature flue gas is discharged from the second air duct 102 and the third air duct 103 after passing through the heat exchange assembly, and the second air duct 102 and the third air duct 103 are arranged side by side, so that the first air duct 101 can be sucked more sufficiently, and the flue gas which is preheated after heat exchange of the heat exchange assembly can be discharged in time.
Optionally, the heat exchange structure further includes a first waste heat exchange assembly and a second waste heat exchange assembly, the first waste heat exchange assembly is used for exchanging heat with the flue gas in the second air duct 102, the second waste heat exchange assembly is used for exchanging heat with the flue gas in the third air duct 103, at this time, because the second air duct 102 and the third air duct 103 can fully discharge the flue gas with waste heat, the first waste heat exchange assembly and the second waste heat exchange assembly can more fully utilize preheating in the flue gas, and the overall heat exchange efficiency is improved. Specifically, the first waste heat exchange assembly and the second waste heat exchange assembly may be fin type heat exchange assemblies.
In one embodiment, as shown in fig. 2 and 3, the housing 100 includes a main body 110 and a smoke collecting hood 120 connected to each other, the first wind tunnel 101 is disposed in the main body 110, the second wind tunnel 102 and the third wind tunnel 103 are disposed in the smoke collecting hood 120, an inlet 121 is disposed on the smoke collecting hood 120, the inlet 121 is communicated with the first wind tunnel 101, and the second wind tunnel 102 and the third wind tunnel 103 are respectively communicated with the inlet 121. The first fan 210 and the second fan 220 can collect the flue gas better from the fume collecting hood 120, and reduce the collection of the flue gas at the fume collecting hood 120.
Optionally, the heat exchanger 400 includes fins and water pipes, and the fins are worn to establish by a part of water pipe, and outside the main part 110 was located around another part of water pipe, the fin accessible absorbed the heat of high temperature flue gas and heated the water pipe, and the main part 110 also can be through the heat transfer realization to the water pipe with the water pipe simultaneously, has improved the thermal utilization ratio to the burning production. Specifically, the fins, the water tubes, and the main body 110 are made of copper, which can better conduct heat.
In one embodiment, as shown in fig. 2 and 3, the smoke collecting hood 120 includes a hood 122, a first split body 123 and a second split body 124, the inlet 121 is disposed in the hood 122, the second air duct 102 is disposed in the first split body 123, the third air duct 103 is disposed in the second split body 124, the first split body 123 includes a first guide portion 123a and a first suction portion 123b sequentially disposed along the second air duct 102, the second split body 124 includes a second guide portion 124a and a second suction portion 124b sequentially disposed along the third air duct 103, the first guide portion 123a and the second guide portion 124a are connected to the hood 122, the first suction portion 123b is disposed on a side of the first guide portion 123a away from the second guide portion 124a, an impeller of the first fan 210 is disposed in the first suction portion 123b, and the second suction portion 124b is disposed on a side of the second guide portion 124a away from the first guide portion 123a The impeller of the second fan 220 is located in the second suction portion 124 b. At this time, the installation positions of the first fan 210 and the second fan 220 are respectively located at two sides of the fume collecting hood 120, the structure is reasonable, and the exposed area of the fume collecting hood 120 can be reduced.
Optionally, the first fan 210 and the second fan 220 are both centrifugal fans 200.
In one embodiment, as shown in fig. 2 and 3, the first guide portion 123a is disposed adjacent to an inner wall of the second guide portion 124a to be inclined with respect to a vertical plane, and the second guide portion 124a is disposed adjacent to an inner wall of the first guide portion 123a to be inclined with respect to a vertical plane. At this time, the two inner walls of the first guide portion 123a and the second guide portion 124a close to each other can guide the smoke in the first air duct 101 to two opposite directions, and the smoke is discharged by different fans 200, so that the mutual interference between the first fan 210 and the second fan 220 during operation is reduced.
Optionally, an inner wall of the first guide portion 123a close to the second guide portion 124a is a first inner wall, an inner wall of the second guide portion 124a close to the first guide portion 123a is a second inner wall, and the first inner wall and the second inner wall are arranged in a V shape to separate two air ducts.
An embodiment discloses a gas heater, includes the heat exchange structure as above.
Above-mentioned gas heater, combustor 300 is used for burning the gas and generates high temperature flue gas, and carry out the heat exchange through heat exchanger 400, first wind channel 101 can be taken out with the flue gas after the heat exchange to fan 200, can be according to the number of opening of the firepower adjustment fan 200 of combustor 300, when the firepower of combustor 300 is less, can open a fan 200, can satisfy the demand, when the firepower of combustor 300 is great, it can provide bigger suction force to open at least two fans 200 simultaneously, make more air get into and be used for participating in the burning of gas in the first wind channel 101, release more heats, and the high temperature flue gas that forms after the burning can be more smooth through the heat transfer part, improve the heat transfer effect, and then increase holistic thermal efficiency.
Optionally, as shown in fig. 2, the burner 300 further includes a gas regulating valve 600, and the gas regulating valve 600 is used for regulating the amount of gas input into the burner 300, so as to control the fire power of the burner 300.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (10)
1. A fan control method is characterized by comprising the following steps:
recording respective accumulated working time of a plurality of fans for air draft;
when the burner is in a small fire state, comparing the accumulated working time of the fan, and starting the fan with the shortest accumulated working time;
and when the combustor is in a big fire state, at least two fans are started.
2. The fan control method according to claim 1, further comprising the step of, when the burner is in a low flame state:
and if the fan with the shortest accumulated working time breaks down, switching another fan to work.
3. The fan control method according to claim 1, wherein the number of the fans is two, and when the burner is in a low fire state, one of the fans is selected to be turned on if the accumulated operating time of the two fans is equal.
4. The fan control method according to claim 3, wherein if the cumulative operating time of the two fans is equal again, the other fan is selected to be turned on.
5. The heat exchange structure applying the fan control method according to any one of claims 1 to 4, characterized by comprising a housing, fans, a burner and a heat exchanger, wherein a first air duct is arranged in the housing, the burner and the heat exchanger are both arranged in the first air duct, the number of the fans is at least two, and the fans are both used for exhausting air in the first air duct.
6. The heat exchange structure according to claim 5, wherein the number of the fans is two, the two fans are respectively a first fan and a second fan, a second air duct and a third air duct are further arranged in the shell, the second air duct and the third air duct are respectively communicated with the first air duct, the first fan is used for exhausting the second air duct, the second fan is used for exhausting the third air duct, the second air duct and the third air duct are arranged side by side, and the second air duct and the third air duct are arranged on one side, away from the burner, of the heat exchanger.
7. The heat exchange structure according to claim 6, wherein the housing includes a main body and a smoke collection hood connected together, the first air duct is disposed in the main body, the second air duct and the third air duct are disposed in the smoke collection hood, an inlet is disposed on the smoke collection hood, the inlet is communicated with the first air duct, and the second air duct and the third air duct are respectively communicated with the inlet.
8. The heat exchange structure according to claim 7, wherein the fume collecting hood includes a hood body, a first divided body and a second divided body, the inlet is arranged in the cover body, the second air duct is arranged in the first sub-body, the third air duct is arranged in the second sub-body, the first sub-body comprises a first guide part and a first air exhaust part which are arranged along the second air channel in sequence, the second split body comprises a second guide part and a second air exhaust part which are sequentially arranged along the third air channel, the first guide part and the second guide part are connected with the cover body, the first air exhaust part is arranged on one side of the first guide part far away from the second guide part, the impeller of first fan is located first induced draft portion, second induced draft portion is located the second guide portion is kept away from one side of first guide portion, the impeller of second fan is located second induced draft portion.
9. The heat exchange structure according to claim 8, wherein the first guide portion is disposed adjacent to an inner wall of the second guide portion that is inclined with respect to a vertical plane, and the second guide portion is disposed adjacent to an inner wall of the first guide portion that is inclined with respect to a vertical plane.
10. A gas water heater comprising a heat exchange structure as claimed in any one of claims 5 to 9.
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| CN202010554645.5A CN111692610A (en) | 2020-06-17 | 2020-06-17 | Fan control method, heat exchange structure and gas water heater |
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| CN202010554645.5A CN111692610A (en) | 2020-06-17 | 2020-06-17 | Fan control method, heat exchange structure and gas water heater |
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| CN111692610A true CN111692610A (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114017926A (en) * | 2021-10-18 | 2022-02-08 | 广东万和新电气股份有限公司 | Water heater and control method and control device thereof |
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Application publication date: 20200922 |
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