CN112128756A - Premixing device and gas equipment - Google Patents
Premixing device and gas equipment Download PDFInfo
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- CN112128756A CN112128756A CN201910556457.3A CN201910556457A CN112128756A CN 112128756 A CN112128756 A CN 112128756A CN 201910556457 A CN201910556457 A CN 201910556457A CN 112128756 A CN112128756 A CN 112128756A
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- 230000000875 corresponding effect Effects 0.000 claims description 6
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- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 105
- 230000008859 change Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 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
- 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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
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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
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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
- F23D14/60—Devices for simultaneous control of gas and combustion air
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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
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a premixing device and gas equipment, wherein the premixing device comprises: the method comprises the following steps: a body defining a gas flow passage having an air inlet and a gas burner; the gas flow adjusting device is arranged in the gas flow channel and used for adjusting the gas quantity and the air quantity participating in mixing, and the mixing quantity of the gas and the air is positively correlated with the air pressure of the air inlet. According to the premixing device provided by the embodiment of the invention, the gas quantity and the air quantity which participate in mixing are adjusted by arranging the gas quantity adjusting device in the gas flow passage, and the mixing quantity of the gas and the air is in positive correlation with the wind pressure of the air inlet, so that a better air-fuel ratio is obtained, and the air-fuel ratio adjusting range is wide.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a premixing device and gas equipment.
Background
The gas mixer in the related art can not effectively adjust the mixing amount of gas and air, has small combustion adjustment ratio, and can not meet the gas equipment with different load requirements.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems to a certain extent.
Therefore, the invention provides a gas mixer, and the air-fuel ratio of the premixing device is good and the universality is strong.
The invention also provides gas equipment with the premixing device, and the gas equipment is high in combustion efficiency.
The premixing device according to the present invention comprises: a body defining a gas flow passage having an air inlet and a gas burner; the gas flow adjusting device is arranged in the gas flow channel and used for adjusting the gas quantity and the air quantity participating in mixing, and the mixing quantity of the gas and the air is positively correlated with the air pressure of the air inlet.
According to the premixing device provided by the embodiment of the invention, the gas quantity and the air quantity which participate in mixing are adjusted by arranging the gas quantity adjusting device in the gas flow passage, and the mixing quantity of the gas and the air is in positive correlation with the wind pressure of the air inlet, so that a better air-fuel ratio is obtained, and the air-fuel ratio adjusting range is wide.
According to some embodiments of the invention, the gas amount adjusting device comprises: the air quantity adjusting plate is arranged in the gas flow channel and is provided with a plurality of air ports opposite to the air inlet; impeller subassembly, impeller subassembly is including running through air regulation plate's pivot with locate a plurality of epaxial impellers, the impeller with air regulation plate relies on the wind pressure drive at least partial coincidence of the ascending projection of perpendicular to paper side impeller subassembly rotates, thereby changes the impeller for air regulation plate's position.
In an optional embodiment, the air volume adjusting plate comprises at least one normally closed air opening and at least one normally open air opening, and the impeller controls the opening of the normally closed air opening.
In an optional embodiment, the number of the normally closed air ports is two, the air volume adjusting plate is provided with two baffles, one baffle is located between the normally closed air port and the normally open air port, the other baffle is located between the normally closed air port and the normally open air port, and two radial edges of the normally open air port are provided with limiting ribs.
In a further alternative embodiment, one of the baffles is provided with a vent.
In a further alternative embodiment, the two baffles and the two normally closed air openings have the same projection area in the direction vertical to the paper surface.
In an optional example, the sum of the flow areas of the two normally closed air ports is the same as the flow area of the normally open air port.
In some embodiments of the present invention, the gas nozzle includes a normally open gas nozzle corresponding to the normally open port, and a normally closed gas nozzle corresponding to the normally closed port.
In an optional embodiment, the gas nozzle penetrates through the inner peripheral wall of the body to be communicated with the gas flow channel, and the impeller assembly further comprises a valve which rotates synchronously with the rotating shaft and is used for controlling the opening degree of the normally-closed gas nozzle.
In a further optional embodiment, the impeller is arranged at one end of the rotating shaft and at the same side of the windward side of the air volume adjusting plate, and the valve is arranged at the other end of the rotating shaft and at the same side of the leeward side of the air volume adjusting plate.
In a further optional embodiment, the impeller assembly further comprises: and one end of the connecting arm is connected to the rotating shaft, and the other end of the connecting arm is connected with the valve.
In an alternative embodiment, the connecting arm is parallel to the centre line of the impeller.
In a further alternative embodiment, at least one of the impellers has a weight greater than the weight of the remaining impellers.
In an optional example, the premixing device comprises a throat section, a flare section and a gas nozzle, wherein the throat section and the flare section are connected in sequence, and the gas nozzle and the gas amount adjusting device are arranged on the throat section.
The gas equipment provided by the embodiment of the invention comprises the gas mixer provided by the embodiment of the invention, and the gas mixer provided by the embodiment of the invention has a large air-fuel ratio adjusting range, and can be suitable for gas equipment with different load requirements, so that the gas equipment provided by the embodiment of the invention has a good air-fuel ratio.
Additional aspects and advantages of the invention 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 invention.
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 schematic block diagram of a gas mixer according to some embodiments of the invention;
FIG. 2 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 3 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 4 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 5 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 6 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 7 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 8 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the present invention;
FIG. 9 is a schematic view of another angle configuration of a gas mixer according to some embodiments of the invention;
FIG. 10 is a schematic structural view of an impeller assembly according to some embodiments of the present invention;
FIG. 11 is a schematic view of another angle configuration of an impeller assembly according to some embodiments of the present invention.
Reference numerals:
a premixing device 100;
a body 10; a gas flow channel 11; an air inlet 111; a gas nozzle 112; a normally closed tuyere 1121; a normally open tuyere 1122; a flared section 12; a throat section 13; a throat section 14;
the air quantity adjusting device 20;
an air volume adjusting plate 21; a tuyere 211; a normally-closed tuyere 2111; a normally open port 2112; a baffle 212; a vent 2121; a limiting rib 213;
an impeller assembly 22; a rotating shaft 221; an impeller 222; a valve 223; a connecting arm 224;
a housing 30.
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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1-11, a premixing device 100 according to an embodiment of the present invention is described, where the premixing device 100 may premix gases of different mediums, so as to obtain a uniformly mixed gas mixture, for example, when gas enters a combustion chamber of a gas appliance for combustion, gas and air may enter the premixing device 100 in advance for premixing, and gas (air-fuel gas for short) after mixing air and gas enters the combustion chamber for sufficiently and effectively combusting. The gas-fired device herein includes, but is not limited to, a forced draft gas-fired device and a forced drum gas-fired device.
In addition, the gas mixer 100 further includes a housing 30, the premixing device 100 is embedded in the housing 30, a gas passage is formed between the outer wall surface of the premixing device 100 and the housing 30, and the gas passage is communicated with the gas nozzle 112.
It can be understood that the combustion efficiency and the air-fuel ratio of the gas-fired device are of great importance, and therefore, the invention focuses on designing a novel premixing device which can effectively regulate the air quantity of the gas and the air which participate in mixing.
Referring to fig. 1-3, the premixing device 100 includes: a body 10 and a gas amount adjusting device 20. The body 10 defines a gas flow passage 11, and the gas amount adjusting device 20 is disposed in the gas flow passage 11 and is used for adjusting the gas amount and the air amount participating in mixing, wherein the mixing amount of the gas and the air is positively correlated with the wind pressure of the air inlet 211.
That is, the amount of air and gas entering the premixing device 100 for mixing is adjustable, and the amount of gas and air mixing is related to the amount of wind pressure. That is, the air volume adjusting device 20 controls the mixing volume of the gas and the air according to the magnitude of the wind pressure. When the wind pressure is larger, the mixing amount of the fuel gas and the air is increased; when the wind pressure is small, the mixing amount of the gas and the air is reduced.
It should be noted that, herein, the air inlet 211 of the premixing device 100 is connected to the air outlet of the fan, and the air inlet pressure of the premixing device 100 is the same as the air outlet pressure of the fan. In other words, the amount of gas and air mixed by the gas flow adjusting device 20 is adjusted depending on the output wind pressure of the fan, so that the gas flow adjusting device can be associated with the relevant parameters of the fan to more precisely control the amount of gas and air mixed, thereby obtaining a better air-fuel ratio.
In addition, the gas quantity adjusting device 20 can control the mixing quantity of the gas and the air in various ways, for example, two valves can be arranged on the body 10 to control the opening degrees of the gas nozzle 112 and the air port 211 respectively, and for example, only one valve for controlling the opening degree of the air port is arranged on the body, and the gas quantity participating in mixing can be controlled by a gas proportional valve.
Therefore, according to the premixing device 100 of the embodiment of the present invention, the amount of gas and the amount of air that are mixed are adjusted by providing the air amount adjusting device in the gas channel 11, and the amount of gas and air that are mixed is in positive correlation with the wind pressure of the air inlet 111, so that a better air-fuel ratio is obtained, and the air-fuel ratio adjusting range is wide.
In some embodiments of the present invention, the gas amount adjusting device 20 includes: an air volume adjusting plate 21 and an impeller assembly 22.
Specifically, the air volume adjusting plate 21 is provided in the gas flow path 11 and formed with a plurality of air ports 211 disposed opposite to the air inlet 111. That is, the plurality of air ports 211 of the air quantity adjusting plate 21 divides the air flow entering the air flow passage 11, and the air quantity involved in the mixing is controlled by controlling the on/off of the plurality of air ports 211. Wherein, the shape of the tuyere 211 can be round, square, fan-shaped or trapezoid, etc.
As shown in fig. 4-6 in conjunction with fig. 10 and 11, the impeller assembly 22 includes a rotating shaft 221 penetrating through the air-flow adjusting plate 21 and a plurality of impellers 222 disposed on the rotating shaft 221, the impeller 222 and the air-flow adjusting plate 21 are at least partially overlapped in a projection in a direction perpendicular to the paper, and the impeller assembly 22 is driven to rotate by wind pressure, so as to change the positions of the impellers 222 relative to the air-flow adjusting plate 21. In other words, the position of the impeller 222 with respect to the air quantity adjusting plate 21 is different under different wind pressure conditions. For example, in the case of a small wind pressure, the impeller 222 is located at the first position, as shown in fig. 4, the impeller 222 cuts off two wind ports 211, and at this time, only one wind port 211 is opened; in the case of a large wind pressure, the impeller 222 is located at the second position, as shown in fig. 5, and the three wind ports 211 of the air quantity adjusting plate 21 are all opened. That is to say, with the change of the wind pressure, the impeller 222 can move between the first position and the second position, so as to change the position of the impeller 222 relative to the air quantity adjusting plate 21, and adjust the opening degree of the wind gap 211, so as to adjust the size of the wind gap 211 in real time according to the wind pressure, and finally adjust the air quantity participating in mixing.
It should be noted that the above is only for illustrating that the positional relationship between the impeller 222 and the air-flow adjusting plate 21 changes with the change of the wind pressure, and the number of the wind ports 211 and the impellers 222 of the air-flow adjusting plate 21 is not limited. The number of the air ports 211 and the impellers 222 of the air quantity adjusting plate 21 can be changed according to the design requirements.
In some embodiments of the present invention, the air volume adjusting plate 21 includes at least one normally closed port 2111 and at least one normally open port 2112, and the impeller 222 controls the opening of the normally closed port 2111. That is, the opening degree of the normally open port 2112 of the airflow adjusting plate 21 is not affected by the air pressure, the normally open port 2112 is always communicated with the air inlet 111, and the minimum air supply amount is ensured through the normally open port 2112. The change of the wind pressure and the position of the impeller 222 relative to the air quantity adjusting plate 21 can change the opening of the normally closed air port 2111, so that the purpose of adjusting the air quantity in real time is achieved. As can be seen from fig. 4 and 5, the larger the overlapping area of the projection of the impeller 222 and the normally-closed tuyere 2111 in the direction perpendicular to the paper surface is, the smaller the opening of the normally-closed tuyere 2111 is, in the case of complete overlapping, the opening of the normally-closed tuyere 2111 is almost zero, in the case of complete non-overlapping, the opening of the normally-closed tuyere 2111 is the largest, and at this time, the amount of air that can participate in mixing is the largest.
In a further alternative embodiment, as shown in fig. 4 and 5, the number of the normally closed air ports 2111 is two, the air volume adjusting plate 21 is provided with two baffles 212, one baffle 212 is located between the normally closed air port 2111 and the normally open air port 2112, the other baffle 212 is located between the two normally closed air ports 2111, and two radial edges of the normally open air port 2112 are provided with limiting ribs 213.
That is, the rotation range of the impeller 222 is limited between the two limiting ribs 213, that is, the rotation range of the impeller 222 does not include the region where the normally open port 2112 is located, so as to avoid the interference of the impeller 222 on the opening degree of the normally open port 2112. In the case where the impeller 222 and the baffle 212 partially coincide or completely coincide, the normally-closed tuyere 2111 is in a partially-opened or fully-opened state.
In an alternative example, one of the baffles 212 is provided with a vent 2121, as shown in fig. 4, so that when the impeller 222 is overlapped with the baffle 212, a part of air can hit the impeller 222 through the vent 2121 to promote the rotation of the impeller 222 and avoid the jamming of the impeller 222.
Preferably, the two baffles 212 and the two normally-closed ports 2111 have the same projected area in the direction perpendicular to the paper surface. Thus, the two normally-closed air ports 2111 can be opened or closed at the same time, which is more beneficial to accurately adjusting the opening of the air port 211, thereby obtaining a better air-fuel ratio.
In an alternative example, the sum of the projected areas of the two normally-closed ports 2111 in the direction perpendicular to the paper surface is the same as the projected area of the normally-open port 2112. Assuming that the flow area of the normally closed air port 2111 is S, the flow area of the normally open air port 2112 is 2S, when the normally closed air ports 2111 are all closed, the air outlet area of the air flow adjusting plate 21 is S, when the normally closed air ports 2111 are all open, the air outlet area of the air flow adjusting plate 21 is 3S, that is, the adjustment range of the air outlet area of the air flow adjusting plate 21 is between S and 3S.
In other embodiments of the present invention, as shown in fig. 1-3, the gas burner 112 includes a normally open gas burner 1122 corresponding to the normally open port 2112, and a normally closed gas burner 1121 corresponding to the normally closed port 2111. That is, the gas nozzles 112 are also divided into two types, one type is normally open, and the other type is normally closed (i.e., selectively open), wherein the normally closed gas nozzles 1121 and the normally closed ports 2111 are opened or closed simultaneously, so that the supply amount of the gas amount and the air amount can be increased or decreased simultaneously, and a preferable air-fuel ratio of the gas mixer is ensured.
In an alternative embodiment, as shown in fig. 1-3 and 6-8, the gas nozzle 112 penetrates through the inner peripheral wall of the body to communicate with the gas flow passage, and the impeller assembly 22 further includes a valve 223, wherein the valve 223 rotates synchronously with the rotating shaft 221 for controlling the opening degree of the normally closed gas nozzle 1121. That is, the gas nozzle 112 is formed on the inner wall of the gas flow passage, and since the valve 223 is integrally disposed on the rotating shaft 221, when the impeller 222 opens the normally-closed air port 2111, the valve 223 also opens the normally-closed gas nozzle 1121 simultaneously. In this embodiment, the valve 223 and the impeller 222 are synchronously driven to rotate by wind pressure, the structural design is relatively simple, and the cost and space problems caused by additionally arranging other driving mechanisms are reduced.
In an alternative embodiment, as shown in fig. 1 in conjunction with fig. 4-8, the impeller 222 is disposed at one end of the rotating shaft 221 and on the same side of the windward side of the air volume adjusting plate 21, and the valve 223 is disposed at the other end of the rotating shaft 221 and on the same side of the leeward side of the air volume adjusting plate 21. That is, the impeller 222 and the valve 223 are respectively disposed at two ends of the rotating shaft 221, so that the force applied to the rotating shaft is relatively uniform and the rotating shaft rotates more smoothly.
In one embodiment, the impeller assembly 22 further comprises: and a connecting arm 224, one end of the connecting arm 224 is connected to the rotating shaft 221, and the other end of the connecting arm 224 is connected to the valve 223. The valve 223 is an arc-shaped plate that can be attached to the inner wall surface of the gas flow path. Preferably, the connecting arms 224 are parallel to the centerline of the impeller 222. Therefore, the impeller 222 and the valve 223 can be ensured to move synchronously, and the normally-closed air opening 2111 and the normally-closed gas nozzle 1121 are opened or closed simultaneously.
It will be appreciated that since the impeller assembly 22 is operated by wind pressure, the impeller assembly 22 will stop rotating as a whole once a sufficiently strong wind pressure is not formed in the gas flow passage. To ensure that the impellers 222 and valves 223 of the impeller assembly 22 can be repositioned in a timely manner, the weight of at least one impeller 222 is greater than the weight of the remaining impellers 222. Therefore, the impeller assembly 22 can be ensured to be automatically reset, and the sensitivity and the reliability of the gas regulating device in long-term use are ensured. Of course, other elastic reset mechanisms may be provided to reset the impeller assembly 22 in time when the blower stops operating.
In other embodiments of the present invention, as shown in fig. 1-3, the premixing device 100 includes a throat section 12, a throat section 13 with a constant cross-section, and a flare section 14 connected in series, and the gas nozzle 112 and the gas amount adjusting device 20 are provided in the throat section 13. The inventor researches and experiments to find that in the process of moving the airflow from the flaring section 12 to the throat section 13, the wind speed is suddenly increased, negative pressure is obviously formed, and how to suck the fuel gas and the air into the throat section 13 is realized to fully mix the fuel gas and the air.
The gas equipment according to the embodiment of the invention comprises the gas mixer 100 of the above embodiment, and the gas equipment 100 according to the embodiment of the invention has a large air-fuel ratio adjusting range and can be suitable for gas equipment with different load requirements, so that the gas equipment according to the embodiment of the invention has a good air-fuel ratio.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. 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.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (15)
1. A premixing apparatus, comprising:
a body defining a gas flow passage having an air inlet and a gas burner;
the gas flow adjusting device is arranged in the gas flow channel and used for adjusting the gas quantity and the air quantity participating in mixing, and the mixing quantity of the gas and the air is positively correlated with the air pressure of the air inlet.
2. The premixing device according to claim 1, wherein the air amount adjusting means comprises: the air quantity adjusting plate is arranged in the gas flow channel and is provided with a plurality of air ports opposite to the air inlet;
impeller subassembly, impeller subassembly is including running through air regulation plate's pivot with locate a plurality of epaxial impellers, the impeller with air regulation plate relies on the wind pressure drive at least partial coincidence of the ascending projection of perpendicular to paper side impeller subassembly rotates, thereby changes the impeller for air regulation plate's position.
3. The premixing device of claim 2 wherein the air volume adjusting plate comprises at least one normally closed air opening and at least one normally open air opening, and the impeller controls the opening of the normally closed air opening.
4. The premixing device according to claim 3 wherein the number of the normally closed air ports is two, the air volume adjusting plate is provided with two baffles, one of the baffles is located between the normally closed air port and the normally open air port, the other baffle is located between the two normally closed air ports, and two radial edges of the normally open air port are provided with limiting ribs.
5. The premixing device of claim 4 wherein one of the baffles is provided with a vent.
6. The premixing device of claim 5 wherein the two baffles and the two normally closed ports have the same projected area in the direction perpendicular to the paper plane.
7. The premixing device of claim 5 wherein the sum of the flow areas of the two normally closed ports is the same as the flow area of the normally open port.
8. The premixing device of claim 3 wherein the gas nozzles comprise a normally open gas nozzle corresponding to the normally open port and a normally closed gas nozzle corresponding to the normally closed port.
9. The premixing device of claim 8 wherein the gas burner is in communication with the gas flow path through the inner peripheral wall of the body, the impeller assembly further comprising a valve rotating in synchronization with the shaft for controlling the opening of the normally closed gas burner.
10. The premixing device of claim 9 wherein the impeller is disposed at one end of the shaft and on the same side of the air volume adjusting plate as the windward side, and the valve is disposed at the other end of the shaft and on the same side of the air volume adjusting plate as the leeward side.
11. The premixing device of claim 10 wherein the impeller assembly further comprises: and one end of the connecting arm is connected to the rotating shaft, and the other end of the connecting arm is connected with the valve.
12. The premixing device of claim 11 wherein the connecting arms are parallel to a centerline of the impeller.
13. The premixing device of any of claims 2-12 wherein the weight of at least one of the impellers is greater than the weight of the remaining impellers.
14. The premixing device according to any of claims 1-12 wherein the premixing device comprises a throat section, a constant cross section throat section and a flare section connected in series, the gas burner and the gas quantity regulating device being provided in the throat section.
15. A gas-fired appliance, comprising: the premixing device of any of claims 1-14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910556457.3A CN112128756A (en) | 2019-06-25 | 2019-06-25 | Premixing device and gas equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910556457.3A CN112128756A (en) | 2019-06-25 | 2019-06-25 | Premixing device and gas equipment |
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| CN112128756A true CN112128756A (en) | 2020-12-25 |
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| CN201910556457.3A Pending CN112128756A (en) | 2019-06-25 | 2019-06-25 | Premixing device and gas equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685582A (en) * | 2021-07-22 | 2021-11-23 | 安徽翰翔智能技术有限公司 | Mechanical stove air-fuel ratio control device and valve path hole opening method thereof |
| CN117704381A (en) * | 2023-12-21 | 2024-03-15 | 重庆富燃科技股份有限公司 | Efficient and full mixing device for premixing fuel gas and air |
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| CN108757153A (en) * | 2018-06-28 | 2018-11-06 | 福州大学 | Variable vortex is oriented to booster |
| CN109539261A (en) * | 2018-11-22 | 2019-03-29 | 北京奥林匹亚锅炉有限公司 | A kind of starting control method of gas burner |
| CN210485714U (en) * | 2019-06-25 | 2020-05-08 | 芜湖美的厨卫电器制造有限公司 | Venturi device and gas equipment |
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| KR20130098918A (en) * | 2012-02-28 | 2013-09-05 | 연태영 | A gas burner apparatus for premixed and dispersion-proportion |
| CN103925595A (en) * | 2013-05-03 | 2014-07-16 | 上海伊德科技有限公司 | Ceramic kiln burner |
| CN206055626U (en) * | 2016-06-08 | 2017-03-29 | 高台县聚庆新能源设备有限公司 | A kind of spiral gas-air premixed device |
| CN107676781A (en) * | 2017-05-17 | 2018-02-09 | 温岭市百然机械有限公司 | Pressure mixing structure applied to low nitrogen short flame burner |
| CN108757153A (en) * | 2018-06-28 | 2018-11-06 | 福州大学 | Variable vortex is oriented to booster |
| CN109539261A (en) * | 2018-11-22 | 2019-03-29 | 北京奥林匹亚锅炉有限公司 | A kind of starting control method of gas burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113685582A (en) * | 2021-07-22 | 2021-11-23 | 安徽翰翔智能技术有限公司 | Mechanical stove air-fuel ratio control device and valve path hole opening method thereof |
| CN117704381A (en) * | 2023-12-21 | 2024-03-15 | 重庆富燃科技股份有限公司 | Efficient and full mixing device for premixing fuel gas and air |
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