CN216203345U - Premixing device for water heater and water heater with same - Google Patents
Premixing device for water heater and water heater with same Download PDFInfo
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- CN216203345U CN216203345U CN202121811940.0U CN202121811940U CN216203345U CN 216203345 U CN216203345 U CN 216203345U CN 202121811940 U CN202121811940 U CN 202121811940U CN 216203345 U CN216203345 U CN 216203345U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000007789 gas Substances 0.000 abstract description 165
- 239000000446 fuel Substances 0.000 abstract description 20
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002737 fuel gas Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- 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
- F24H1/124—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 using fluid fuel
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/315—Control of valves of mixing valves
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The utility model discloses a premixing device for a water heater and the water heater with the same, wherein the premixing device for the water heater comprises: the gas-liquid separation device comprises a shell and a turning plate, wherein a first gas flow channel, a second gas flow channel, a first gas channel and a second gas channel are formed in the shell; the plate turning is rotatably arranged on the shell to adjust the opening degree of the first gas channel and the opening degree of the first gas channel, the plate turning is provided with a wind guide hole right opposite to the first gas channel, the oxygen content of the whole load section can be guaranteed to be constant by the premixing device, the air-fuel ratio can be constant no matter under a large load working condition or a small load working condition, the premixing device is simple in structure, obvious in effect, good combustion performance can be guaranteed, and meanwhile safety of users is guaranteed.
Description
Technical Field
The utility model relates to the field of domestic appliances, in particular to a premixing device for a water heater and the water heater with the premixing device.
Background
In the related technology, the conventional combustion mode of the full-premixing condensing gas water heater needs to mix gas and oxygen in advance, the air-fuel ratio is ensured to be constant, and a series of problems of uneven air-fuel ratio are also generated while the combustion performance is improved by the premixed gas and the oxygen, so that the safety hazard is generated. The mechanical premixer is generally adopted in the industry to mix gas and air in advance, however, the mechanical premixer cannot ensure the consistency of the air-fuel ratio under the working conditions of small load and large load, the general mechanical premixer controls the proportion of the gas and the air through the turning plate, the opening degree of the turning plate structure cannot effectively control the air-fuel ratio, and particularly under the working condition of low load, as the turning plate completely seals part of gas channels and gas channels, the air-fuel ratio of the water heater under the working condition of low load is too low, the combustion performance is deteriorated, the use of users is influenced, and even a series of safety problems such as tempering and explosion of the fully premixed gas water heater exist.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a premixing device for a water heater and a water heater having the same. The premixing device can ensure that the oxygen content of the whole load section is constant, and the air-fuel ratio can be constant no matter under a large load working condition or a small load working condition.
The utility model also provides a water heater with the premixing device.
The premixing device for a water heater according to the present invention comprises: a shell and a turning plate. A first air flow channel, a second air flow channel, a first fuel gas channel and a second fuel gas channel are formed in the shell; the turning plate is rotatably arranged on the shell to adjust the opening degrees of the first gas channel and the first gas channel, and an air guide hole opposite to the first gas channel is arranged on the turning plate.
The utility model adopts the turning plate structure to control the gas flow, and the turning plate can solve the problem of low oxygen content of the fully premixed gas water heater under the condition of small load operation by adjusting the gas flow areas of the first gas flow channel and the first gas flow channel, thereby ensuring the oxygen content of the whole load section to be constant and achieving the purpose of constant air-fuel ratio. The arrangement is simple in structure, obvious in effect, capable of guaranteeing good combustion performance and guaranteeing safety of users.
In some examples of the utility model, the first gas flow passage surrounds the first gas passage.
In some examples of the present invention, a first support portion is formed in the housing, the first gas flow passage is provided in the first support portion, a second support portion is provided in the first gas flow passage, and the first gas passage is provided in the second support portion.
In some examples of the utility model, an end face of the free end of the second support part is arranged obliquely to an end face of the free end of the first support part, and the flap is rotatable to abut against the end face of the second support part and/or the end face of the first support part.
In some examples of the present invention, the first support part is inclined in a direction from top to bottom toward a direction in which air flows.
In some examples of the present invention, a third support portion is formed in the housing, a second air flow channel is formed in the third support portion, a fourth support portion is formed in the second air flow channel, a second fuel gas channel is formed in the fourth support portion, and an end surface of the third support portion protrudes from an end surface of the first support portion.
In some examples of the present invention, a first support rib is disposed between the first support portion and the second support portion, and a second support rib is disposed between the third support portion and the fourth support portion.
In some examples of the utility model, the turning plate is provided with a flow guiding rib opposite to the first gas channel.
In some examples of the utility model, the cross-sectional area of the second gas passage is smaller than the cross-sectional area of the first gas passage.
The water heater according to the present invention is briefly described as follows.
The water heater provided with the premixing device in the embodiment is provided with the water heater provided with the premixing device in any one of the embodiments, so that the water heater is provided with the turnover plate structure, the air-fuel ratio can be ensured to be constant under a small-load working condition, the combustion performance is good, the use is safe, the structure is simple, and the installation is convenient.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a premixing device in accordance with an embodiment of the present invention.
FIG. 2 is a rear view of a premixing device in accordance with an embodiment of the present invention.
FIG. 3 is a schematic illustration of the premixer gas air flow path according to one embodiment of the present invention.
Reference numerals:
a premixing device 1;
a housing 10;
a first support part 11; a second support portion 12; a third support portion 13; a fourth support portion 14;
the first air flow path 11 a; a first gas passage 12 a; the second airflow passage 13 a; the second gas passage 14 a;
a flap 20;
a wind guide hole 21; and a flow guide rib 22.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the related technology, the conventional combustion mode of the full-premixing condensing gas water heater needs to mix gas and oxygen in advance, the air-fuel ratio is ensured to be constant, and a series of problems of uneven air-fuel ratio are also generated while the combustion performance is improved by the premixed gas and the oxygen, so that the safety hazard is generated. The mechanical premixer is generally adopted in the industry to mix gas and air in advance, however, the mechanical premixer cannot ensure the consistency of the air-fuel ratio under the working conditions of small load and large load, the general mechanical premixer controls the proportion of the gas and the air through the turning plate, the opening degree of the turning plate structure cannot effectively control the air-fuel ratio, and particularly under the working condition of low load, as the turning plate completely seals part of gas channels and gas channels, the air-fuel ratio of the water heater under the working condition of low load is too low, the combustion performance is deteriorated, the use of users is influenced, and even a series of safety problems such as tempering and explosion of the fully premixed gas water heater exist.
A premixing device for a water heater in accordance with an embodiment of the present invention will be described with reference to fig. 1 to 2.
As shown in fig. 1 to 2, a premixing device 1 for a water heater according to the present invention comprises: a housing 10 and a flap 20. The housing 10 has a first air flow passage 11a, a first gas flow passage 12a, a second air flow passage 13a, and a second gas flow passage 14a formed therein. Air may enter the housing 10 through the first and second air flow passages 11a and 13a, and gas may enter the housing 10 through the first and second gas passages 12a and 14 a. The turning plate 20 is arranged on the shell 10, the turning plate 20 can rotate on the shell 10, and the turning plate 20 limits the gas flow passing through the first gas channel 12a by adjusting the opening degrees of the first gas channel 12a and the first gas channel 11 a; the turning plate 20 is provided with an air guide hole 21, the air guide hole 21 faces the first air flow channel 11a, air can pass through the air guide hole 21, and the turning plate 20 can block the gas flow to prevent the gas flow passing through the turning plate 20 from being too large.
The premixing device 1 is used in a gas water heater, after the premixing device 1 and a water heater fan are installed, gas and air respectively enter the premixing device 1 for premixing, the gas enters a first gas channel 12a and a second gas channel 14a, and the air also enters a first air flow channel 11a and a second air flow channel 13 a. Under the condition of maximum load working, the turning plate 20 is completely opened due to the attraction of the fan, the first gas channel 12a and the second gas channel 14a are simultaneously communicated for providing gas, the first gas channel 11a and the second gas channel 13a are simultaneously communicated for providing air, and the air is mixed with the gas; under the minimum load working condition, the opening degree of the turning plate 20 is reduced, the flow rates of the first gas channel 12a and the first gas flow channel 11a are small, the gas flow rate passing through the first gas channel 12a is very small, at the moment, the turning plate 20 almost completely falls down to block the flow rate of the gas, the gas is limited to enter a mixed gas cavity through the first gas channel 12a, and the air can also pass through the turning plate 20 from the air guide hole 21 which is opposite to the first gas flow channel 11a on the turning plate 20, so that under the small load working condition, the air is simultaneously provided by the second gas flow channel 13a and the air flow passing through the air guide hole 21 on the turning plate 20. Due to the arrangement of the air guide holes 21, the premixing device 1 can reduce the gas flow under the working condition of small load and improve the air flow, so that the ratio of air to gas of the premixing device 1 under the working condition of small load is improved, the use safety of the gas water heater is ensured, and the combustion performance of the gas water heater is improved.
In the premixing device 1 related to the present invention, the turning plate 20 can rotate under the air flow driven by the air of the water heater, after the diameters of the first air channel 12a and the second air channel 14a are determined, under the low rotation speed of the fan, the turning plate 20 will close the first air channel 11a and the first air channel 12a, and the ratio of the air and the gas flowing through the second air channel 14a and the second air channel 13a is fixed, only the air supplied by the second air channel 13a can not reach the preset air-fuel ratio, and the flow rate of the air needs to be increased, the present solution adopts the way of opening the turning plate 20 to increase the flow rate of the air under the low load condition, so as to increase the air-fuel ratio under the low load condition, the turning plate 20 can solve the problem of low oxygen content under the low load condition of the full premix gas water heater by adjusting the air flow areas of the first air channel 11a and the first air channel 12a, the oxygen content of the whole load section is ensured to be constant, so that the aim of keeping the air-fuel ratio constant is fulfilled. The arrangement is simple in structure, obvious in effect, capable of guaranteeing good combustion performance and guaranteeing safety of users.
In some embodiments of the present invention, the casing 10 is divided into an upper casing and a lower casing, the upper casing has a gas inlet and an air inlet distributed thereon, and the lower casing has a first gas flow channel 11a, a second gas flow channel 13a, a first gas flow channel 12a, and a second gas flow channel 14 a. The gas gets into first gas passageway 12a chamber through the gas entry of last casing, the air gets into first gas passageway 11a through the air entry of last casing, first gas passageway 12a is encircleed by first gas passageway 11a, encircle first gas passageway 11a and set up the periphery at first gas passageway 12a, gas is gaseous to the periphery at the gaseous middle part of air, the gas can fully disperse the mixture in the air current, make the mixing of gas air more even, the possibility of deflagration has been reduced, set up gas and can the intensive mixing like this, it is effectual to mix, ensure that the water heater can have good combustion performance.
In some embodiments of the present invention, a first support 11 is formed in the lower case, the first support 11 defines a first gas flow passage 11a, a second support 12 is disposed in the first gas flow passage 11a, and the second support 12 defines a first gas passage 12 a. The first support part 11 and the second support part 12 may be respectively formed integrally with the housing 10, the first support part 11 and the second support part 12 may be configured as an integral injection molded part with the housing 10, the first support part 11 and the second support part 12 are provided to form a first gas passage 12a and a first gas flow passage 11a, and by disposing the second support part 12 in the first gas flow passage 11a of the first support part 11, a disposition form of the first gas flow passage 11a around the first gas passage 12a is achieved.
In other embodiments of the present invention, the first support part 11 and the second support part 12 are juxtaposed such that the first gas flow passage 11a and the first gas combustion passage 12a are spaced apart from each other, and the first gas flow passage 11a and the first gas combustion passage 12a are parallel to each other.
In some embodiments of the present invention, the second supporting portion 12 located at the lower case has two end surfaces, the end surface contacting the upper case is a non-free end surface, and the other end of the second supporting portion 12 is a free end; the first support part 11 located at the lower casing has two end faces, the end face contacting with the upper casing is a non-free end face, the other end of the first support part 11 is a free end, and the free end face of the second support part 12 is obliquely arranged with the free end face of the first support part 11. The turning plate 20 can rotate to abut against the end face of the second supporting portion 12 and/or the end face of the first supporting portion 11, under the small load working condition, a fan of the water heater cannot drive the turning plate 20, and the turning plate 20 abuts against the end face of the second supporting portion 12 and the end face of the first supporting portion 11 under the action of self gravity, so that the first gas channel 12a and the first gas channel 11a are sealed, and the water heater is suitable for the small load working condition.
In some embodiments of the present invention, the free end surface of the first support 11 of the lower housing is inclined in the direction from top to bottom toward the air flowing direction, the turning plate 20 is installed on the free end surface of the first support 11, and due to the inclined arrangement of the free end surface of the first support 11, the turning plate 20 can generate a component force pressing on the free end surface of the first support 11 under the action of gravity, so that the turning plate 20 stably seals the front of the first air flow channel 11a and the first gas channel 12 a. After the fan is turned on, the turning plate 20 can be opened by the attraction of the fan, air in the first air flow passage 11a and gas in the first gas flow passage 12a can pass through the baffle, and the opening degree of the turning plate 20 can be controlled by changing the load of the fan during operation, so that the gas flow flux passing through the first gas flow passage 12a is controlled.
By obliquely arranging the end surface of the free end of the first support part 11 and the end surface of the free end of the second support part 12, the gravity of the flap 20 generates a component force on the end surfaces of the first support part 11 and the second support part 12, so that the flap 20 is pressed against the end surface of the free end of the first support part 11 and the end surface of the free end of the second support part 12, thereby effectively closing the first gas passage 12a and the first gas flow passage 11 a.
In some embodiments of the present invention, a third support portion 13 is formed in the lower case, the third support portion 13 defining a second air flow passage 13a, a fourth support portion 14 is provided in the second air flow passage 13a, and the fourth support portion 14 defining a second air flow passage 14 a. The end face of the third supporting portion 13 is protruded from the end face of the first supporting portion 11, the third supporting portion 13 and the fourth supporting portion 14 can be respectively formed integrally with the housing 10, the third supporting portion 13 and the fourth supporting portion 14 can be configured as an integrally injection-molded part with the housing 10, the third supporting portion 13 and the fourth supporting portion 14 are configured to form a second gas passage 14a and a second gas flow passage 13a, and the arrangement of the second gas flow passage 13a around the second gas passage 14a is realized by arranging the fourth supporting portion 14 in the second gas flow passage 13a of the third supporting portion 13.
The third support portion 13 and the fourth support portion 14 may be respectively integrally formed with the housing 10, the third support portion 13 and the fourth support portion 14 may be configured as an integrally injection-molded part with the housing 10, the third support portion 13 and the fourth support portion 14 are provided to form a second gas flow passage 14a and a second gas flow passage 13a, and by disposing the fourth support portion 14 in the second gas flow passage 13a of the third support portion 13, an arrangement form of the third gas flow passage around the second gas flow passage 14a is realized.
In other embodiments of the present invention, the third support portion 13 is juxtaposed with the fourth support portion 14 such that the third air flow passage and the third gas flow passage are spaced apart from each other and are parallel to each other.
In some embodiments of the present invention, a first supporting rib is disposed between the first supporting portion 11 and the second supporting portion 12, and the first supporting rib is used to connect the inner circumferential wall of the first air flow channel 11a and the outer circumferential wall of the second supporting portion 12, so as to improve the stability of the second supporting portion 12 and ensure the structural reliability of the whole premixing device 1. The first supporting rib may be configured in a plurality of pieces, and the plurality of first supporting pieces are spaced and arranged around the periphery of the second supporting portion 12.
The second support rib is obliquely arranged close to one end of the turning plate 20; a plurality of second support ribs are arranged between the third support portion 13 and the fourth support portion 14, and the second support ribs are used for connecting the inner side wall of the second air flow channel 13a and the outer peripheral wall of the fourth support portion 14 to support the fourth support portion 14, so as to improve the stability of the fourth support portion 14, ensure the reliability of the whole structure of the premixing device 1, and are arranged around the periphery of the fourth support portion 14 at intervals. In some embodiments of the present invention, the turning plate 20 is provided with a diversion rib 22 facing the first gas channel 12a, the diversion rib 22 is arc-shaped, two ends of the arc-shaped diversion rib 22 are free ends, an arc-shaped opening of the diversion rib 22 faces one side of a pivot axis of the turning plate 20, and the height of the diversion rib 22 is gradually reduced from the middle part towards the free end.
Under the working condition that the turning plate 20 is opened by a small opening degree to open the first gas channel 12a and the first gas channel 11a, the flow velocity of the gas flow is too large, the ratio of the air to the gas cannot meet the design requirement, and the flow guide ribs 22 can reduce the flow velocity of the gas in the corresponding first gas channel 12a and reduce the gas flow so as to enable the mixed gas to reach the preset air-fuel ratio.
In some embodiments of the utility model, the cross-sectional area of the first gas passage 12a is greater than the cross-sectional area of the second gas passage 14 a. When the flap 20 gradually opens the first gas passage 12a, the premixing device 1 is switched from a low-load working condition to a high-load working condition, and the cross-sectional area of the first gas passage 12a is larger than that of the second gas passage 14a, so that the requirement of the water heater for high-load gas is met. According to one embodiment of the utility model, a premixing device 1 for a water heater comprises a housing 10 and a flap 20. The housing 10 comprises an upper housing and a lower housing, wherein the upper housing is provided with a gas inlet and an air inlet which are not communicated with each other; the lower shell is provided with a first supporting part 11 and a third supporting part 13, the first supporting part 11 defines a first air flow channel 11a, and the third supporting part 13 defines a second air flow channel 13 a; a second support part 12 is arranged in the first air flow channel 11a, and a fourth support part 14 is arranged in the second air flow channel 13 a; the second support portion 12 defines a first gas passage 12a, and the fourth support portion 14 defines a second gas passage 14 a; the inner peripheral wall of the first air flow channel 11a in the first supporting part 11 is provided with a first supporting rib, the first supporting rib is connected with the first supporting part 11 and the second supporting part 12, the inner wall of the second air flow channel 13a in the third supporting part 13 is provided with a second supporting rib, and the second supporting part is connected with the third supporting part 13 and the fourth supporting part 14. A gas inlet on the upper shell is respectively communicated with the second supporting part 12 and the fourth supporting part 14, and gas enters the first gas channel 12a and the second gas channel 14a after entering the gas inlet of the shell 10; after entering the air inlet of the housing 10, the air enters the first air flow channel 11a and the second air flow channel 13a, respectively.
The turning plate 20 is arranged on the lower shell, the turning plate 20 is located on one side, far away from the upper shell, of the lower shell, mounting grooves are formed in the side walls, facing each other, of the lower shell, pivoting shafts are arranged in the mounting grooves, and the turning plate 20 is connected with the pivoting shafts to be rotatably arranged on the lower shell.
The first supporting portion 11 and the second supporting portion 12 of the housing 10 have two end faces respectively, the end face far away from the upper housing is a free end, the end faces of the two free ends are obliquely arranged in the direction from top to bottom towards the air flowing direction, the turning plate 20 can rotate to be abutted against the end face of the first supporting portion 11 and/or the end face of the second supporting portion 12, and the turning plate 20 can stably seal the first air flow channel 11a and the first gas channel 12a under the action of gravity. Two air guide holes 21 are formed in the turning plate 20, and the air guide holes 21 are arranged right opposite to the first air flow channel 11 a; the turning plate 20 is provided with a flow guide rib 22, the flow guide rib 22 faces the first gas channel 12a, the flow guide rib 22 is arc-shaped, two ends of the flow guide rib 22 are free ends, an arc-shaped opening of the flow guide rib 22 faces the air circulation direction, and the height of the flow guide rib 22 is gradually reduced towards the free end.
After the water heater premixing device 1 and the water heater fan are installed, air enters the first air flow channel 11a and the second air flow channel 13a from the air inlet of the upper shell respectively, and gas enters the first gas flow channel 12a and the second gas flow channel 14a from the gas inlet of the upper shell respectively. Under the condition of maximum load working, the turning plate 20 is completely opened due to the attraction of the fan, and the fuel gas can be mixed with the air entering the first air flow channel 11a and the second air flow channel 13a through the first fuel gas channel 12a and the second fuel gas channel 14a, so that the content of the air and the fuel gas in the mixed gas is ensured; under the minimum load working condition, the gas flow passing through the first gas channel 12a is very small, at the moment, the turning plate 20 almost completely falls down, the turning plate 20 limits the gas flow flux in the first gas channel 12a, and the air in the first gas channel 11a can pass through the air guide hole 21 on the turning plate 20, so that the proportion of the gas and the air can be controlled while the gas flow is reduced, and the use safety and the good combustion performance are ensured.
The premixing device 1 of the water heater has a simple structure, and can achieve the purpose of constant air-fuel ratio from a small load section to a large load section by adjusting the flow area of the air flow channel.
The water heater according to the present invention is briefly described as follows.
The water heater provided with the premixing device 1 of the embodiment is provided with the water heater provided with the premixing device 1 of any one of the embodiments, so that the water heater is provided with the turnover plate 20 structure, the air-fuel ratio can be ensured to be constant under a small-load working condition, the combustion performance is good, the use is safe, the structure is simple, and the installation is convenient.
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 utility model 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 utility model.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A premixing device for a water heater, comprising:
the gas burner comprises a shell, a gas burner and a gas burner, wherein a first gas flow channel, a second gas flow channel, a first gas channel and a second gas channel are formed in the shell;
the turning plate is rotatably arranged on the shell to adjust the opening degrees of the first gas channel and the first gas channel, and an air guide hole opposite to the first gas channel is formed in the turning plate.
2. The premixing device for a water heater of claim 1 wherein the first gas flow passage surrounds the first gas passage.
3. The premixing device for a water heater of claim 2 wherein a first support is formed in the housing, the first gas flow passage is provided in the first support, a second support is provided in the first gas flow passage, and the first gas flow passage is provided in the second support.
4. The premixing device for a water heater in claim 3 wherein the end surface of the free end of the second support part is inclined to the end surface of the free end of the first support part, and the flap is rotatable to abut against the end surface of the second support part and/or the end surface of the first support part.
5. The premixing device for a water heater of claim 4 wherein the first support portion is inclined in a direction of air flow in a top-down direction.
6. The premixing device for a water heater of claim 4 wherein a third support is formed in the housing, a second air flow passage is formed in the third support, a fourth support is formed in the second air flow passage, a second air flow passage is formed in the fourth support, and an end surface of the third support protrudes from an end surface of the first support.
7. The premixing device for a water heater of claim 6 wherein a first support rib is provided between the first support portion and the second support portion and a second support rib is provided between the third support portion and the fourth support portion.
8. The premixing device for a water heater of claim 1 wherein the flap is provided with a flow guiding rib facing the first gas channel.
9. The premixing device for a water heater in accordance with any one of claims 1 to 8 wherein the cross-sectional area of the second gas passage is smaller than the cross-sectional area of the first gas passage.
10. A water heater comprising a premixing device as claimed in any of claims 1-9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121811940.0U CN216203345U (en) | 2021-08-04 | 2021-08-04 | Premixing device for water heater and water heater with same |
| PCT/CN2022/109919 WO2023011516A1 (en) | 2021-08-04 | 2022-08-03 | Premixing device for water heater and water heater having same |
| US18/239,457 US20230400181A1 (en) | 2021-08-04 | 2023-08-29 | Premixing device for water heater and water heater having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121811940.0U CN216203345U (en) | 2021-08-04 | 2021-08-04 | Premixing device for water heater and water heater with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216203345U true CN216203345U (en) | 2022-04-05 |
Family
ID=80895923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121811940.0U Active CN216203345U (en) | 2021-08-04 | 2021-08-04 | Premixing device for water heater and water heater with same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20230400181A1 (en) |
| CN (1) | CN216203345U (en) |
| WO (1) | WO2023011516A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011516A1 (en) * | 2021-08-04 | 2023-02-09 | 芜湖美的厨卫电器制造有限公司 | Premixing device for water heater and water heater having same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5820428B2 (en) * | 2013-04-30 | 2015-11-24 | リンナイ株式会社 | Premixing device |
| JP6831285B2 (en) * | 2017-04-19 | 2021-02-17 | リンナイ株式会社 | Premixer |
| CN112128750A (en) * | 2019-06-25 | 2020-12-25 | 芜湖美的厨卫电器制造有限公司 | Gas mixer and gas equipment |
| CN213119082U (en) * | 2020-07-16 | 2021-05-04 | 广东万和新电气股份有限公司 | Air inlet device of premixer, linear premixer and gas water heater |
| CN112283709A (en) * | 2020-11-02 | 2021-01-29 | 芜湖美的厨卫电器制造有限公司 | Premixer, gas water heater and air pressure protection method thereof |
| CN216203345U (en) * | 2021-08-04 | 2022-04-05 | 芜湖美的厨卫电器制造有限公司 | Premixing device for water heater and water heater with same |
-
2021
- 2021-08-04 CN CN202121811940.0U patent/CN216203345U/en active Active
-
2022
- 2022-08-03 WO PCT/CN2022/109919 patent/WO2023011516A1/en unknown
-
2023
- 2023-08-29 US US18/239,457 patent/US20230400181A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011516A1 (en) * | 2021-08-04 | 2023-02-09 | 芜湖美的厨卫电器制造有限公司 | Premixing device for water heater and water heater having same |
Also Published As
| Publication number | Publication date |
|---|---|
| US20230400181A1 (en) | 2023-12-14 |
| WO2023011516A1 (en) | 2023-02-09 |
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