CN218599711U - Combustion assembly and gas water heater - Google Patents

Abstract

The utility model discloses a combustion assembly and a gas water heater, which comprises a frame and at least two burners, wherein the frame is provided with an accommodating cavity with an upward opening; the combustor is located the holding intracavity, all be formed with the overgrate air runner between two adjacent combustors and between the inside wall of combustor and frame, be equipped with in the overgrate air runner and keep off gas spare and intercommunication portion, the intercommunication portion is for being located a plurality of air through holes on keeping off the gas spare, the first gap that forms between two adjacent fender gas spares, keep off at least one of the second gap that forms between gas spare and the inside wall and the third gap that forms between fender gas spare and the combustor, the intercommunication portion is higher than the bottom of combustor. This application is through being equipped with fender gas spare and intercommunication portion in the secondary air runner, and the intercommunication portion is higher than the bottom of combustor, through the size and the height of adjustment intercommunication portion to adjust primary air and secondary air's proportion, and adjust secondary air and distribute in the combustion area territory and in order to reach best combustion effect.

Description

Combustion assembly and gas water heater

Technical Field

The utility model relates to a combustor technical field particularly, relates to a combustion assembly and gas heater.

Background

In the prior art, air required by gas combustion enters a combustion chamber through two different secondary air flow channels: a plurality of burners fixed within the burner frame; the primary air enters the combustor through the injection port of the outer combustor of the frame, is finally mixed with the fuel gas, and is sprayed out from the fire hole of the combustor to enter the combustion chamber; the secondary air enters the combustion chamber through the gap between the burners and the inner side of the frame. In order to improve the combustion enhancement effect, an air adjusting baffle is usually arranged below a combustor frame, the air flow resistance of a secondary air flow channel is increased, and part of air is forced to enter the combustor to become one part of primary air, so that the proportion of the primary air is increased. However, the structure has poor distribution uniformity of secondary air, which causes incomplete combustion due to insufficient air, so that the combustion efficiency of fuel gas is reduced, and the combustion intensity of a combustion system is not improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a combustion assembly can improve gas combustion efficiency.

According to the utility model discloses a burning subassembly of first aspect embodiment, including frame and at least two combustors, the frame has the holding chamber that opens up; the combustor is located the holding intracavity, all is formed with the secondary air runner between two adjacent combustors and between combustor and the inside wall of frame, be equipped with in the secondary air runner and keep off gas spare and intercommunication portion, intercommunication portion be located keep off gas spare on a plurality of air through holes, two adjacent keep off at least one in the first gap that forms between the gas spare, keep off gas spare and the second gap that forms between the inside wall and keep off gas spare and the third gap that forms between the combustor, the intercommunication portion is higher than the bottom of combustor.

According to the utility model discloses combustion assembly has following beneficial effect at least: this application is through being equipped with fender gas spare and intercommunication portion in the secondary air runner, and the intercommunication portion is higher than the bottom of combustor, through the size and the height of adjustment intercommunication portion to adjust primary air and secondary air's proportion, and adjust secondary air and distribute in the combustion area territory and in order to reach best combustion effect.

According to some embodiments of the invention, the communicating part is equal in height to the fire hole of the burner.

According to some embodiments of the utility model, the combustor includes two curb plates and fire hole piece, two the curb plate links to each other in order to form the ascending cavity of opening, fire hole piece lid is located the cavity the opening part, the fire hole is located on the fire hole piece.

According to some embodiments of the invention, the end of the fire hole piece extends towards the inside of the secondary air flow channel to form the air baffle.

According to some embodiments of the invention, at least one of the side plates has a hem extending towards a direction away from the cavity, the hem forming the gas barrier.

According to some embodiments of the invention, the hem has a plurality of the through-air holes.

According to some embodiments of the present invention, a total area of the plurality of the communication portions is not more than 70% of a total area of upper end openings of the plurality of the secondary air flow passages.

According to some embodiments of the utility model, keep off the gas piece for inserting locate baffle in the overgrate air runner.

According to some embodiments of the utility model, it is a plurality of keep off the gas piece and be integrated into one piece.

According to the utility model discloses a gas heater of second aspect embodiment, include the utility model discloses the combustion assembly of above-mentioned first aspect embodiment.

According to the utility model discloses gas heater has following beneficial effect at least: by adopting the combustion assembly, the combustion effect can be improved.

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 top view of a first embodiment of a combustion assembly provided by an example of the present invention;

FIG. 2 is a cross-sectional schematic view of the combustion assembly shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a second embodiment of a combustion assembly provided by an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a third embodiment of a combustion assembly provided by an example of the present invention.

Reference numerals: a frame 100; a secondary air flow passage 110; a combustor 200; a side plate 210; a fire hole piece 220; fire holes 221; a communicating portion 300; the gas barrier 400.

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 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 exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The existing gas instantaneous water heater generally adopts an atmospheric combustion mode with strengthening effect. The atmospheric combustion mode is characterized by secondary combustion, and the basic process is that after the fuel gas is sprayed out from a nozzle, negative pressure is formed at an injection port of a combustor, air around the injection port is sucked into the combustor, and meanwhile, under the action of a forced draught fan, part of air also enters the combustor; the air entering the burner is called primary air, which, in general, should be less than the amount of air necessary for complete combustion of the gas; after being uniformly mixed in the combustor, the fuel gas and the sucked air are sprayed out from a fire hole of the combustor and are ignited for primary combustion to form intermediate substances and emit part of heat; the intermediate matter is contacted with the air around the burner to complete combustion and release a great deal of heat, and the air supplemented in the second stage of atmospheric combustion of the gas is called as secondary air.

From the characteristics of gas combustion, the primary air and the gas are mixed well, so that the mixture can be nearly fully utilized, while the secondary air is limited by a product structure, the mixing uniformity degree of the secondary air and intermediate substances is relatively poor, and the utilization rate is low.

The atmospheric combustion has the advantages of high combustion intensity and good load regulation performance, and is widely applied to household gas appliances.

In order to further promote gas combustion intensity, reduce the product volume, reduce product material cost simultaneously, the gas heater of current domestic production mostly adopts the intensive combustion technique: adopt the combustor frame, enclose the multi-disc combustor, the combustor frame is connected with the water heater combustion chamber simultaneously, and under the effect of air-blower or air exhauster, partial air can get into the combustor, becomes a part of primary air, just so can promote gas combustion intensity, realizes less product volume.

In the prior art, air required by gas combustion enters a combustion chamber through two different channels: a plurality of burners fixed within the burner frame; the primary air enters the combustor through the injection port of the outer combustor of the frame, is finally mixed with the fuel gas, and is sprayed out from the fire hole of the combustor to enter the combustion chamber; the secondary air enters the combustion chamber through the gap between the burners and the inner side of the frame. In order to enhance the combustion effect, an air adjusting baffle is usually arranged below a combustor frame, the air flow resistance of a secondary air channel is increased, and partial air is forced to enter the combustor to become a part of primary air, so that the proportion of the primary air is increased, and the complete combustion of gas is realized.

In addition, in order to ensure the flame transmission between each burner, baffles are generally arranged at two ends of each burner, each baffle is formed by bending a burner shell, the main purpose of the baffle is to partially block the supplement of secondary air so as to solve the problem of flame transmission, the area of the baffle is small, the baffle only accounts for about 10% of a secondary air channel, and the baffle breaks the local combustion air distribution and has disadvantages and no advantages from the view of complete combustion of gas.

And current atmospheric combustion mode of reinforceing exists not enoughly, though through combustor frame below baffle, can adjust primary air and secondary air's proportion, nevertheless at secondary air and combustor fire hole spun gas air current, there is certain local space phenomenon of mismatching: the gas sprayed from the burner fire hole is basically uniform, but the secondary air supplemented around the burner is limited by a plurality of factors, including the effects of an exhaust fan or a blower, the position of a baffle plate and the opening layout thereof, the space shape of the burner and the like, and the distribution uniformity is poor, so that the incomplete combustion of the gas caused by insufficient air occurs locally. To compensate for this mismatch, more air is generally required to enter the combustion system to ensure complete combustion of the gas, which results in a decrease in the combustion efficiency of the gas and is also not beneficial to improving the combustion intensity of the combustion system.

From practical test data, the oxygen content in the flue gas of the existing gas water heater is usually about 10%, that is, the gas is completely combusted, and 2 times of the air amount required by the chemical complete combustion is required. Through careful analysis, it can be found that, because the gas is sprayed from the burner fire hole, part of the air is premixed, the amount of the premixed air is usually about 0.8 times of the amount of the chemically completely combusted air, the rest 0.2 times of the amount of the chemically completely combusted air needs secondary air to supplement, and the total amount of the secondary air supplement is about 1.2 times of the amount of the chemically completely combusted air, and the difference between the two amounts is 6 times, therefore, because the amount of the gas sprayed from the burner fire hole has poor matching effect with the secondary air, the total secondary air supply can only be increased to ensure the complete combustion of the gas, and the secondary air supplement efficiency is extremely low.

From the actual test effect, in the smoke distribution at the outlet of the heat exchanger of the water heater, most of the smoke has higher oxygen content, but the smoke also has low oxygen content and carbon monoxide formed by incomplete combustion of the gas is high, and the existence of the position causes the reduction of the combustion efficiency of the gas.

If can effectively solve gas combustion in-process gas and air mixing problem, have several advantages at least: the heat efficiency of the water heater is improved, the load of the burner is improved, meanwhile, the gas and the air are rapidly combusted in the gas combustion process, and the reduction of harmful nitrogen oxides in the flue gas is facilitated. Based on the above background, the utility model provides a combustion assembly.

A combustion assembly according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4. The combustion assembly comprises a square frame 100 and five combustors 200, wherein the frame 100 is provided with a containing cavity with an upward opening; the burners 200 are located in the accommodating cavities, secondary air channels 110 are formed between two adjacent burners 200 and between the inner side walls of the burners 200 and the frame 100, the number of the secondary air channels 110 is 6, a communicating part 300 and an air blocking piece 400 are arranged in each secondary air channel 110, the communicating part 300 is higher than the bottom end of each burner 200, namely, an air adjusting baffle is arranged on one side of each burner 200, and each communicating part 300 is an air through hole located on the air blocking piece 400.

It should be noted that the number of the burners 200 may be 2, 3, or 4, etc., and the number of the air baffle 400 in the secondary air channel 110 may be 2, 3, or 4, etc., and they are not limited herein. The communication portion 300 may be a first gap formed between two adjacent air barriers 400, a second gap formed between the air barriers 400 and the inner sidewall, and a third gap formed between the air barriers 400 and the burner 200, or the communication portion 300 may be any two of an air through hole, a first gap, a second gap, and a third gap.

This application is through being equipped with gas-retaining piece 400 and intercommunication portion 300 in secondary air runner 110, intercommunication portion 300 is higher than the bottom of combustor 200, be about to set up gas-retaining piece 400 at the lateral part of combustor 200, through size and the height of adjustment intercommunication portion 300, with the proportion of adjusting primary air and secondary air, and the adjustment secondary air distributes in the burning combustion area, realize combustor 200 fiery hole 221 spun gas air current, with the rational matching of each position of combustor 200 of secondary air, thereby reach best combustion effect.

The specific working process is as follows: when the water heater works, after gas and primary air are mixed, the gas is sprayed out from the fire holes 221 of the burner 200, and after the gas is ignited, primary combustion is completed, and intermediate substances are generated; the secondary air flows into the secondary air flow passage 110 and enters the combustion space through the communication part 300 to chemically react with the intermediate substance, thereby completing the complete combustion process of the gas. When realizing the reasonable matching of gas and air, through the secondary air of intercommunication portion 300, can keep certain velocity of flow, be favorable to the abundant contact of air and gas, promote the rapid mixing of gas and air, make the combustion reaction accomplish more fast to reach best combustion effect.

The whole combustion technology of the gas water heater in the prior art is rough, the existing air baffle mainly has the functions of adjusting the proportion of primary air and secondary air in the gas combustion process, and simultaneously, the distribution of the secondary air is improved by changing the position of an opening of the baffle so as to be beneficial to complete combustion; while this patent is then when adjusting the primary air and the secondary air proportion of gas combustion in-process, the active control secondary air distributes to guarantee that each flame exit position of combustor 200 all has the combustion-promoting air of appropriate amount, realize the complete combustion, thereby improve combustor 200 wholeness ability.

The utility model discloses though the shape and the mounted position of gas piece 400 and intercommunication portion 300 have just simply been changed, its fundamental change lies in the progress of gas combustion technique, when initiative regulation gas atmosphere formula burning primary air and secondary air proportion, through gas piece 400 and the distribution of intercommunication portion 300 initiative adjustment secondary air to ensure that the gas is under the prerequisite of lower excess air proportion relatively, accomplish the complete combustion of gas, realize high-efficient burning mesh. The maximum advantage lies in having changed gas heater gas combustion situation, can be through the ventilation part, the distribution of the secondary air that fires is promoted in the initiative adjustment to realize the intensive burning of higher intensity, the gas complete combustion degree is higher, gas combustion efficiency is higher, finally realize the reduction of gas heater total volume and the reduction of manufacturing cost.

In the existing combustion technology, the key point is to have enough air for realizing complete combustion, and if local air is insufficient, resulting in incomplete combustion of fuel gas and affecting the overall combustion effect, more air is introduced to cover local problem areas, thereby causing the combustor 200 to have overlarge volume and reduced combustion efficiency. The advantage of this patent just lies in guaranteeing every local position, and the gas contacts with appropriate amount of air, realizes complete combustion to realize combustor 200 volume reduction, combustion efficiency improvement.

In some embodiments of the present invention, referring to fig. 2 and 3, the connecting portion 300 is as high as the fire hole 221 of the burner 200, so that the combustion efficiency is better. It is understood that the communication portion 300 may also be lower than the fire hole 221 of the burner 200, for example, 0.5 mm to 5 mm.

In some embodiments of the present invention, referring to fig. 2 and 3, the burner 200 includes two side plates 210 and fire holes 221, the two side plates 210 are connected to form a cavity with an upward opening, the fire holes 221 are covered on the opening of the cavity, the fire holes 221 are located on the fire holes 221, the structure is simple, and the manufacturing is convenient. Further, the communication portion 300 is higher than the bottom wall of the cavity.

In some embodiments of the present invention, referring to fig. 4, the ends of the fire holes 221 pieces 220 extend toward the inside of the secondary air flow passage 110 to form the air blocking member 400, which facilitates manufacturing and reduces installation steps.

In some embodiments of the present invention, referring to fig. 3, two side plates 210 have a folded edge extending toward the direction away from the cavity, the width of the folded edge is less than 1/2 of the width of the secondary air flow passage 110, the folded edge forms the air blocking member 400, a first gap is formed between two adjacent folded edges, the secondary air enters the combustion chamber through the first gap, and the structural strength of the air blocking member 400 and the burner 200 is improved to avoid the vibration caused by the gas combustion airflow when the water heater is in operation. It is understood that only one side plate 210 may have a folded edge extending in a direction away from the cavity, and the width of the folded edge may be greater than 1/2 of the width of the secondary air flow passage 110, equal to 1/2 of the width of the secondary air flow passage 110, or less than 1/2 of the width of the secondary air flow passage 110, and the communication part 300 may be a third gap between the folded edge and an adjacent side wall. Of course, the communication portion 300 may be a plurality of air through holes on the flange, as shown in fig. 1.

In some embodiments of the present invention, the total area of the plurality of communication parts 300 is not more than 70% of the total area of the upper end openings of the plurality of secondary air flow passages 110, and the combustion efficiency is better.

In some embodiments of the present invention, referring to fig. 2, the baffle 400 is a baffle inserted into the secondary air flow passage 110, and can be directly improved in the existing combustion assembly to obtain the solution of the present invention, which is beneficial to recycling.

In some embodiments of the present invention, the plurality of air blocking members 400 are integrally formed, thereby increasing structural strength and ensuring a life span.

According to the gas heater (not shown in the figure) of the second aspect embodiment of the utility model, include the combustion assembly of any embodiment of above-mentioned first aspect of the utility model.

According to the utility model discloses gas heater through adopting above-mentioned combustion assembly, can improve the combustion effect.

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 present 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.

While embodiments of the present invention 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 invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A combustion assembly, comprising:

a frame (100) having an accommodating cavity with an upward opening;

the combustor comprises at least two combustors (200) which are located in the accommodating cavity, secondary air flow channels (110) are formed between every two adjacent combustors (200) and between the combustors (200) and the inner side wall of the frame (100), air blocking pieces (400) and communicating parts (300) are arranged in the secondary air flow channels (110), the communicating parts (300) are at least one of air through holes located in the air blocking pieces (400), first gaps formed between every two adjacent air blocking pieces (400), second gaps formed between the air blocking pieces (400) and the inner side wall and third gaps formed between the air blocking pieces (400) and the combustors (200), and the communicating parts (300) are higher than the bottom ends of the combustors (200).

2. The combustion assembly according to claim 1, wherein the communication portion (300) is flush with a fire hole (221) of the burner (200).

3. The burner assembly of claim 2, wherein the burner (200) comprises two side plates (210) and a fire hole plate (220), the two side plates (210) are connected to form a cavity with an upward opening, the fire hole plate (220) is arranged at the opening of the cavity in a covering manner, and the fire hole (221) is arranged on the fire hole plate (220).

4. The combustion assembly of claim 3, wherein an end of the fire hole piece (220) extends inwardly towards the secondary air flow passage (110) to form the air baffle (400).

5. A combustion assembly according to claim 3, wherein at least one of the side plates (210) has a flange extending away from the cavity, the flange forming the gas barrier (400).

6. The combustion assembly of claim 5, wherein the flange has a plurality of the air through holes.

7. The combustion assembly according to claim 1, wherein a total area of the plurality of communication portions (300) is not more than 70% of a total area of upper end openings of the plurality of secondary air flow passages (110).

8. The combustion assembly of claim 1, wherein the gas baffle (400) is a baffle plate inserted in the secondary air flow channel (110).

9. The combustion assembly of claim 1, wherein a plurality of said gas barrier members (400) are integrally formed pieces.

10. A gas water heater comprising a combustion assembly according to any one of claims 1 to 9.

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