CN109654720B - Combustion apparatus - Google Patents
Combustion apparatus Download PDFInfo
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- CN109654720B CN109654720B CN201811071031.0A CN201811071031A CN109654720B CN 109654720 B CN109654720 B CN 109654720B CN 201811071031 A CN201811071031 A CN 201811071031A CN 109654720 B CN109654720 B CN 109654720B
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- burner
- gap
- side plate
- plate
- combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F23D14/045—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 with a plurality of burner bars assembled together, e.g. in a grid-like arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/02—Structural details of mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D23/00—Assemblies of two or more burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2210/00—Noise abatement
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
- Air Supply (AREA)
Abstract
The present invention provides a combustion apparatus, comprising: a burner chamber (21), a heat exchanger (12), and a burner support frame (32) supporting a plurality of burners (11). A side plate inner gap (S3) through which air can flow is provided between the outermost burner (11E) and the support frame side plate (43), a side plate outer gap (S4) through which air can flow is provided between the support frame side plate (43) and the side wall (212), the side plate outer gap (S4) has a width greater than that of the side plate inner gap (S3), and the support frame side plate (43) is extended above the upper end of the outermost burner (11E).
Description
Technical Field
The present invention relates to a combustion apparatus such as a water heater or a heating heat source device. In particular, the present invention relates to a combustion apparatus for heating a heat medium flowing through a heat exchanger by combustion exhaust gas generated by a burner.
Background
Conventionally, there has been known a combustion apparatus such as a water heater or a heating heat source device including a burner that burns a mixed gas of a fuel gas and air to generate combustion exhaust gas and a heat exchanger that heats a heat medium flowing inside by the combustion exhaust gas. In such a combustion apparatus, it is desirable that a combustor chamber and a heat exchanger for accommodating the combustor be as small as possible for the sake of miniaturization and cost reduction.
However, if the volume of the combustor chamber is too small, the pressure fluctuation around the flame hole becomes large when the combustor is vigorously burned. As a result, the combustion balance is disturbed to cause vibration combustion, thereby generating resonance sound. In view of the above, it has been proposed to provide a substantially L-shaped or substantially コ -shaped partition plate on the inside or outside of the side wall of the combustor chamber (for example, japanese utility model application laid-open No. 5-96739). In this combustion apparatus, a semi-closed space serving as a pressure absorbing chamber is formed on a side of a burner arrangement portion that houses the burner in order to suppress pressure fluctuations around the flame hole.
However, in the above-described combustion apparatus, it is necessary to provide a partition plate for forming a pressure absorbing chamber partitioned from the combustor arrangement portion on the inner side or the outer side of the side wall of the combustor chamber. Therefore, the number of parts and the number of assembly steps increase. In addition, the operation of assembling the partition or the burner to the burner chamber becomes complicated. As a result, manufacturing costs increase. In addition, if a space defined by the comparatively large burner arrangement portion is provided on the side of the burner arrangement portion, the combustion flame of the outermost burner is likely to spread to the space side due to the flow of air in the burner chamber. As a result, the combustion flame is accelerated to sway, and the combustion noise increases.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to reduce the manufacturing cost of a combustion device such as a water heater or a heating heat source unit and to reduce noise during combustion operation.
According to the present invention, there is provided a combustion apparatus comprising:
a plurality of burners having flame holes at an upper end;
a burner chamber housing the plurality of burners;
a heat exchanger that recovers heat in the combustion exhaust gas generated by the plurality of burners to heat a heat medium, and is connected to an upper portion of the burner chamber; and
a burner support frame that supports the plurality of burners arranged in the lateral direction in the burner chamber and has a support frame side plate that faces an outer surface of an outermost burner arranged on an outermost side among the plurality of burners,
the inner side gap of the side plate capable of circulating air is arranged between the outermost burner and the side plate of the supporting frame,
a side-plate outside gap capable of circulating the air having a width larger than that of the side-plate inside gap is provided between the support-frame side plate and the side wall of the combustor chamber,
the support frame side plate extends to be disposed further above an upper end portion of the outermost burner.
According to the present invention, not only the structure and assembly operation of the entire apparatus can be simplified, but also vibration combustion or wobbling of the combustion flame can be suppressed. Thus, a low-noise combustion apparatus can be provided at low cost.
Drawings
Fig. 1 is a schematic vertical cross-sectional view of a combustion apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of the periphery of a burner of the combustion apparatus according to the embodiment of the present invention.
Fig. 3 is a schematic longitudinal cross-sectional view of the periphery of a side plate of a support frame of a combustion apparatus according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, a combustion apparatus 1 according to an embodiment of the present invention is a water heater including a plurality of burners 11 that generate combustion exhaust gas, a heat exchanger 12 that recovers heat in the combustion exhaust gas, and a combustion fan 13 that supplies air for combustion to the burners 11. The combustion exhaust gas is generated by burning a mixed gas of the fuel gas and air ejected from the flame holes 110 provided at the upper end portion of the burner 11. Although not shown, water (heat medium) supplied from a water supply pipe to the heat exchanger 12 through the water inlet pipe 14 is heated by combustion exhaust gas, and heated hot water is supplied from the hot water outlet pipe 15 to a hot water outlet of a faucet, a shower, or the like through a hot water supply pipe.
The outer case 10 of the combustion apparatus 1 includes a substantially rectangular box-shaped case body 10A that is open at the front, and a front panel (not shown) that covers the front opening of the case body 10A. In the present specification, the depth direction of the case body 10A when the outer case 10 is viewed from the front panel side is referred to as the front-rear direction, the width direction is referred to as the left-right direction, and the height direction is referred to as the up-down direction.
A substantially rectangular box-shaped combustor chamber 21 having an upper end opened is provided inside the casing main body 10A. The plurality of burners 11, which are long in the front-rear direction, are arranged in a lateral direction at substantially the center in the lateral direction in the burner chamber 21. The can 22 constituting the outer contour of the heat exchanger 12 is formed in a substantially rectangular tubular shape with both upper and lower ends open. The lower end opening of the tank 22 is connected to the upper end opening of the combustor chamber 21. An exhaust duct 23 for guiding the combustion exhaust gas or the combustion air introduced into the can body 22 to the outside of the outer case 10 is connected to an upper end opening of the can body 22. In the present embodiment, the lateral width of the combustor chamber 21 is set to be larger than the lateral width of the tank 22.
The exhaust duct 23 includes an upper cover 23A covering the upper end opening of the can body 22 from above, and a cylindrical body 23B extending upward from the center of the upper wall of the upper cover 23A. The inner space of the upper lid 23A communicates with the outside of the outer case 10 via the air outlet 230 at the upper end of the cylinder 23B.
An air inlet 210 for introducing air for combustion of the burner 11 into the burner chamber 21 is opened in a bottom wall 211 of the burner chamber 21. The combustion fan 13 is connected to the air inlet 210.
As described above, the housing case 10 is further provided with a divided air supply/discharge path for air passing through the burner chamber 21 and the tank 22 from the air inlet 210 and further connected to the air outlet 230 through the discharge duct 23. Therefore, when the combustion fan 13 is operated, the air outside the apparatus is forcibly introduced into the combustor chamber 21 from the air introduction port 210 as the air for combustion of the combustor 11. The introduced air is sent into the tank 22 together with the combustion exhaust gas generated by the burner 11, and is further led out to the outside of the apparatus through the exhaust duct 23 from the exhaust port 230.
The heat exchanger 12 has: a plurality of plate-like heat transfer fins 121 disposed in parallel at predetermined intervals in the longitudinal and lateral directions in the can 22; and a plurality of circular straight-tube-shaped heat absorbing tubes 122 extending between the left and right side walls 222 of the can 22 and inserted through the heat transfer fins 121 in a direction perpendicular thereto. The heat of the combustion exhaust gas introduced into the can 22 is recovered by the heat transfer fins 121 and the heat absorbing pipe 122, and the water flowing through the heat absorbing pipe 122 is thereby heated.
The heat absorbing pipes 122 are connected in series outside the side wall 222 of the tank 22. Therefore, the plurality of heat absorbing pipes 122 form one heat exchange line meandering between the side walls 222. The inlet pipe 14 is connected to the upstream end of the heat exchange line, and the outlet pipe 15 is connected to the downstream end of the heat exchange line.
Each of the burners 11 has a flat plate-like cylindrical body formed by overlapping a plurality of metal plates press-molded into a predetermined shape. Two independent gas introduction paths G1, G2 are defined in each combustor 11.
As shown in fig. 2, a gas inlet for a light flame (hereinafter referred to as "light gas inlet") 111 facing a gas discharge nozzle for a light flame (not shown) and a gas inlet for a rich flame (hereinafter referred to as "rich gas inlet") 112 facing a gas discharge nozzle for a rich flame (not shown) are provided at the tip end of the burner 11.
As shown in fig. 2 and 3, the flame holes 110 are constituted by flame holes for a light flame (hereinafter referred to as "light flame holes") 113 connected to the light gas introduction port 111 through a gas conduction path G1 for a light flame and flame holes for a rich flame (hereinafter referred to as "rich flame holes") 114 connected to the rich gas introduction port 112 through a gas conduction path G2 for a rich flame. Therefore, the fuel gas injected from the gas injection nozzle for the light flame toward the light gas introduction port 111 is introduced into the gas guiding path G1 for the light flame together with the air around the light gas introduction port 111. Then, a light mixed gas having a fuel gas concentration lower than the stoichiometric air-fuel ratio is ejected from the light flame holes 113. On the other hand, the fuel gas injected from the gas spouting nozzle for the rich flame toward the rich gas introduction port 112 is introduced into the gas guiding path G2 for the rich flame together with the air around the rich gas introduction port 112. Then, rich mixed gas having a higher fuel gas concentration than the lean mixed gas is ejected from the rich flame holes 114.
As shown in fig. 1 to 3, a distribution plate 31 is provided between the burners 11 in the burner chamber 21 and the bottom wall 211. The distribution plate 31 has a plurality of vent holes 30. Therefore, the air introduced from the air inlet 210 into the combustor chamber 21 is distributed as secondary air for combustion to the portion where the combustor 11 is disposed (hereinafter referred to as "combustor disposed portion") S1 or the side plate outer side gap S4 described later, via the distribution plate 31.
The distribution plate 31 is supported by the left and right side walls 212 of the burner chamber 21. Therefore, the distribution plate 31 extends between the left and right side walls 212, and the internal space of the combustor chamber 21 is divided vertically by the distribution plate 31. A substantially rectangular tubular burner support frame 32 having four plate bodies, front, rear, right and left, is provided on the upper surface of the distribution plate 31. The burner 11 is disposed in a space inside the burner support frame 32. That is, the space inside the burner support frame 32 forms the burner arrangement portion S1.
As shown in fig. 2, the front end portion and the rear end portion of the combustor 11 support a front plate (hereinafter referred to as "support frame front plate") 41 and a rear plate (hereinafter referred to as "support frame rear plate") 42, respectively, which are fixed to the combustor support frame 32.
The support frame front plate 41 and the support frame rear plate 42 are coupled to left and right side plates (hereinafter referred to as "support frame side plates") 43 of the burner support frame 32 at left and right ends, respectively. The lower end portions of the pair of left and right support frame side plates 43 are supported and fixed to the upper surface of the distribution plate 31. Accordingly, the burners 11 are supported and fixed to the upper surface of the distribution plate 31 by the burner support frame 32.
As shown in fig. 2 and 3, a gap (hereinafter referred to as "burner gap") S2 having a predetermined lateral width (for example, 2mm) is provided between the side surfaces of two adjacent burners 11 so as to appropriately guide the air introduced from the vent hole 30 into the burner arrangement portion S1 to the periphery of the flame hole 110 of each burner 11.
The pair of support frame side plates 43 are disposed adjacent to the outer surface of the outermost burner (hereinafter referred to as "outermost burner") 11E of the plurality of burners 11 arranged in the parallel direction of the burners 11. In order to appropriately guide the air introduced from the vent hole 30 to the burner arrangement portion S1 to the periphery of the flame hole 110 of the outermost burner 11E, a gap (hereinafter referred to as "side plate inner gap") S3 having a width (for example, 2mm) substantially the same as the burner gap S2 is provided between the support frame side plate 43 and the outer side surface of the outermost burner 11E.
A side plate outer gap S4 is provided between the support frame side plate 43 and the side wall 212, that is, on both right and left sides of the burner arrangement portion S1. The side plate outer side gap S4 absorbs pressure fluctuations around the flame hole 110 during combustion operation. The side panel outer gap S4 has a larger left-right width (e.g., 25mm) than the side panel inner gap S3. Therefore, during the combustion operation, the flow velocity of the air flowing through the side plate inner gap S3 is higher than the flow velocity of the air flowing through the side plate outer gap S4.
As shown in fig. 3, each vent hole 30 is formed by a small circular hole having a diameter substantially equal to the left-right width of the burner gap S2. The vent holes 30 are opened at predetermined intervals in the front-rear direction in regions below the burner gap S2, the side plate inner gap S3, and the side plate outer gap S4 of the distribution plate 31, respectively. Therefore, the air passing through each vent hole 30 is smoothly guided into the burner gap S2, the side plate inner gap S3, and the side plate outer gap S4 corresponding to the region in which each vent hole 30 is opened.
The vent holes 30 in the lower region of the side plate outer side gap S4 and the vent holes 30 in the lower region of the side plate inner side gap S3 are formed such that the ratio of the total opening area of the vent holes 30 to the area of the lower region of the side plate outer side gap S4 is smaller than the ratio of the total opening area of the vent holes 30 to the area of the lower region of the side plate inner side gap S3. That is, the proportion of the total opening area of the vent holes 30 in the region below the side plate outer side gap S4 is smaller than the proportion of the total opening area of the vent holes 30 in the region below the side plate inner side gap S3. Therefore, the amount of air flowing into the side panel outer gap S4 per unit time is smaller than the amount of air flowing into the side panel inner gap S3 per unit time.
The support frame side plate 43 is supported and fixed to the distribution plate 31 in a state where substantially the entire lower end portion is in contact with the upper surface of the distribution plate 31. The support frame side plate 43 is erected substantially vertically upward from the upper surface of the distribution plate 31. Therefore, the space above the predetermined height from the upper surface of the distribution plate 31 of the combustor chamber 21 is divided into the combustor arrangement portion S1 and the side plate outer side gap S4 by the support frame side plate 43. Thus, the air flowing from the vent hole 30 into the burner arrangement portion S1 flows linearly upward in the burner arrangement portion S1 to a height exceeding the upper end of the support frame side plate 43. The air flowing from the vent hole 30 into the side panel outer gap S4 flows linearly upward in the side panel outer gap S4 to a height exceeding the upper end of the support frame side panel 43.
The support frame side plate 43 extends such that the upper end thereof is positioned above the upper end edge of the outer contour (hereinafter referred to as "burner cover") 115 of the outermost burner 11E by a predetermined height (for example, 2 mm). Therefore, the air flowing upward in the side plate inside gap S3 is guided upward along the support frame side plate 43 as it is after passing the lateral side of the upper end edge of the burner cover 115. Thus, during the combustion operation, the combustion flame formed above the flame holes 110 of the outermost burner 11E is suppressed from spreading toward the side-plate outer gap S4.
In the combustion apparatus 1, the support frame side plate 43 of the burner support frame 32 defines a side plate outer side gap S4 inside the side wall 212. Therefore, unlike the conventional combustion apparatus, a separate partition plate for defining a space inside the side wall 212 is not provided, and pressure fluctuation around the flame hole 110 is suppressed. Therefore, the structure and assembly operation of the device can be simplified. Further, resonance noise caused by vibration combustion can be reduced. This reduces the cost of the combustion apparatus 1 and reduces noise generated during combustion operation.
Further, by extending the support frame side plate 43 above the upper end portion (flame hole forming portion) of the outermost burner 11E, the combustion flame of the outermost burner 11E is less likely to spread toward the side plate outer gap S4 side during the combustion operation. Further, since the combustion flame of the outermost burner 11E is less likely to be affected by the air flowing from the side plate outer side gap S4 side to the outermost burner 11E side, the combustion state is less likely to become unstable. Therefore, combustion noise caused by the oscillation of the combustion flame can be reduced.
Further, since the gap (side plate inner gap) S3 having substantially the same lateral width as the burner gap S2 is defined between the outer surface of the outermost burner 11E and the support frame side plate 43, the secondary air is supplied to the periphery of the flame holes 110 of the outermost burner 11E in substantially the same amount as the periphery of the flame holes 110 of the other burners 11. Therefore, fluctuation in the combustion state is less likely to occur between the central burner 11 and the burners 11 at both ends. Therefore, combustion noise caused by the oscillation of the combustion flame can be reduced more.
Further, during the combustion operation, the speed of the air flowing through the side plate inner gap S3 is higher than the speed of the air flowing through the side plate outer gap S4. Therefore, the air flowing through the side plate inner space S3 is smoothly guided to the upper side of the flame holes 110 of the outermost burner 11E. Therefore, the combustion flame of the outermost burner 11E is less likely to spread toward the side-plate outer gap S4. Further, the combustion flame of the outermost burner 11E is less likely to be affected by the air flowing from the side plate outer side gap S4 side to the outermost burner 11E side, and the combustion state is less likely to be unstable. This can further reduce combustion noise caused by the fluctuation of the combustion flame.
Since the ratio of the total opening area of the vent holes 30 in the area below the side plate outer gap S4 is smaller than the ratio of the total opening area of the vent holes 30 in the area below the side plate inner gap S3, the amount of air flowing into the side plate outer gap S4 per unit time is smaller than the amount of air flowing into the side plate inner gap S3 per unit time. Therefore, the combustion flame of the outermost burner 11E is less likely to spread toward the side-plate outer gap S4. Further, the combustion flame of the outermost burner 11E is less likely to be affected by the air flowing from the side plate outer side gap S4 side to the outermost burner 11E side, and the combustion state is less likely to be unstable. This can further reduce combustion noise caused by the fluctuation of the combustion flame.
In the above embodiment, the vent hole 30 is opened in the distribution plate 31 in a region below the side-plate outer gap S4 in order to allow air to flow through the side-plate outer gap S4. However, as long as the spread of the combustion flame of the outermost burner 11E toward the side-plate outer gap S4 can be suppressed, the vent hole 30 may not be opened in the region below the side-plate outer gap S4 so as not to introduce air into the side-plate outer gap S4.
In the above embodiment, the vent holes 30 are formed by small circular holes opened at predetermined intervals in the front-rear direction of the distribution plate 31. However, the vent hole 30 may be constituted by a single or a plurality of slits that are long in the front-rear direction as long as air is appropriately introduced into the burner gap S2, the side-plate inside gap S3, and the side-plate outside gap S4.
The present invention is not limited to a water heater having only a hot water supply function, and can be applied to a water heater having a bath supplementary heating function. The present invention is also applicable to a heating heat source unit that circulates and supplies hot water to a hot water heating terminal, a heat source unit of a hot water storage type hot water supply system, and a heat source unit having only a sensible heat exchanger.
In the above embodiment, the side plate inner space S3 and the side plate outer space S4 are provided on both left and right sides of the burner arrangement portion S1. However, depending on the form of the heat source unit 1, the side panel inner space S3 and the side panel outer space S4 may be provided on either the left or right side of the burner installation portion S1.
Although the present invention has been described in detail above, the present invention is summarized as follows.
According to the present invention, there is provided,
provided is a combustion device provided with:
a plurality of burners having flame holes at an upper end;
a burner chamber housing the plurality of burners;
a heat exchanger that recovers heat in the combustion exhaust gas generated by the plurality of burners to heat a heat medium, and is connected to an upper portion of the burner chamber; and
a burner support frame that supports the plurality of burners arranged in the lateral direction in the burner chamber and has a support frame side plate that faces an outer surface of an outermost burner arranged on an outermost side among the plurality of burners,
the inner side gap of the side plate capable of circulating air is arranged between the outermost side burner and the side plate of the supporting frame,
a side plate outside gap capable of circulating the air having a width larger than that of the side plate inside gap is provided between the support frame side plate and the side wall of the combustor chamber,
the support frame side plate extends to be disposed further above an upper end portion of the outermost burner.
According to the above combustion apparatus, the support frame side plate of the burner support frame that supports the burner defines a space (side plate outer side gap) inside the side wall of the burner chamber. Therefore, unlike the conventional combustion apparatus, a separate partition plate for defining a space inside the side wall of the combustor chamber is not provided, and pressure fluctuations around the flame holes can be suppressed. Therefore, not only the structure and assembly operation of the device can be simplified, but also resonance noise caused by vibration combustion can be reduced.
Further, according to the above combustion apparatus, since the support frame side plate is extended above the upper end portion (i.e., the flame hole forming portion) of the outermost burner, the combustion flame of the outermost burner is less likely to spread toward the side plate outer side gap side during the combustion operation. Further, since the combustion flame of the outermost burner is less likely to be affected by the air flowing from the side plate outer side gap side to the outermost burner side, the combustion state of the outermost burner is less likely to become unstable. Therefore, combustion noise caused by the oscillation of the combustion flame can be reduced.
Preferably, in the above combustion apparatus,
the burner chamber is formed in such a way that: in the combustion operation, the flow velocity of the air flowing upward from below in the side plate inside gap is higher than the flow velocity of the air flowing upward from below in the side plate outside gap.
According to the above combustion apparatus, during the combustion operation, the air flowing through the gap between the outermost burner and the support frame side plate (i.e., the side plate inner gap) is guided to the upper side of the flame hole of the outermost burner at a speed higher than the air flowing through the space outside the support frame side plate (i.e., the side plate outer gap). Therefore, the combustion flame of the outermost burner is less likely to spread toward the side plate outer gap side. Further, since the combustion flame of the outermost burner is less likely to be affected by the air flowing from the side plate outer side gap side to the outermost burner side, the combustion state of the outermost burner is less likely to become unstable. Therefore, combustion noise caused by the oscillation of the combustion flame can be further reduced.
Preferably, the combustion apparatus further includes:
a distribution plate having a plurality of ventilation holes, the distribution plate being disposed entirely between a pair of side walls of the burner chamber facing each other below the plurality of burners,
the distribution plate is formed in such a manner that: the proportion of the total opening area of the vent holes in the area below the lateral plate outer side gap is smaller than the proportion of the total opening area of the vent holes in the area below the lateral plate inner side gap.
According to the above combustion apparatus, the inflow amount per unit time of the air flowing into the gap outside the side plate through the ventilation holes of the distribution plate is smaller than the inflow amount per unit time of the air flowing into the gap inside the side plate through the ventilation holes of the distribution plate. Therefore, the air flowing upward from the side plate outer side gap is less likely to flow toward the outermost combustor, and the combustion state of the outermost combustor is less likely to become unstable. Therefore, combustion noise caused by the oscillation of the combustion flame can be further reduced.
Claims (3)
1. A combustion apparatus is characterized by comprising:
a plurality of burners having flame holes at an upper end;
a burner chamber housing the plurality of burners;
a heat exchanger that recovers heat in the combustion exhaust gas generated by the plurality of burners to heat a heat medium, and is connected to an upper portion of the burner chamber;
a combustor support frame that supports the plurality of combustors arranged side by side in the combustor chamber and has a support frame side plate facing an outer side surface of an outermost combustor arranged on an outermost side among the plurality of combustors; and
a distribution plate having a plurality of vent holes, the distribution plate being disposed entirely between a pair of side walls of the burner chamber facing each other below the plurality of burners,
the inner side gap of the side plate capable of circulating air is arranged between the outermost burner and the side plate of the supporting frame,
a side-plate outside gap capable of circulating the air having a width larger than that of the side-plate inside gap is provided between the support-frame side plate and the side wall of the combustor chamber,
the support frame side plate extends to be higher than the upper end part of the outermost burner, and the lower end part of the support frame side plate is supported and fixed on the upper surface of the distribution plate.
2. The combustion apparatus as claimed in claim 1,
the burner chamber is formed in such a way that: in the combustion operation, the flow velocity of the air flowing upward from below in the side plate inside gap is higher than the flow velocity of the air flowing upward from below in the side plate outside gap.
3. The combustion apparatus according to claim 1 or 2, further comprising:
the distribution plate is formed in such a manner that: the proportion of the total opening area of the vent holes in the area below the lateral plate outer side gap is smaller than the proportion of the total opening area of the vent holes in the area below the lateral plate inner side gap.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017197338A JP2019070492A (en) | 2017-10-11 | 2017-10-11 | Combustion apparatus |
| JP2017-197338 | 2017-10-11 |
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| Publication Number | Publication Date |
|---|---|
| CN109654720A CN109654720A (en) | 2019-04-19 |
| CN109654720B true CN109654720B (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811071031.0A Active CN109654720B (en) | 2017-10-11 | 2018-09-13 | Combustion apparatus |
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| Country | Link |
|---|---|
| EP (1) | EP3470750B1 (en) |
| JP (1) | JP2019070492A (en) |
| CN (1) | CN109654720B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6959009B2 (en) * | 2017-01-24 | 2021-11-02 | リンナイ株式会社 | Combustion device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6062848A (en) * | 1998-05-29 | 2000-05-16 | Coen Company, Inc. | Vibration-resistant low NOx burner |
| CN1576694A (en) * | 2003-07-30 | 2005-02-09 | 上海能率有限公司 | Impact forging forming metal combustor and method for producing the same impact forging metal combustion device |
| CN1847729A (en) * | 2005-04-11 | 2006-10-18 | 林内株式会社 | One-can type complex heat source machine |
| CN105091341A (en) * | 2014-05-16 | 2015-11-25 | 林内株式会社 | Heat source machine |
| CN106016692A (en) * | 2015-03-26 | 2016-10-12 | 株式会社能率 | Combustion apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2578833Y2 (en) | 1992-05-13 | 1998-08-20 | 日立化成工業株式会社 | Burner chamber of combustion equipment |
| JP3403534B2 (en) * | 1995-01-31 | 2003-05-06 | 株式会社ガスター | Combustion equipment |
| JP3534602B2 (en) * | 1998-02-18 | 2004-06-07 | 株式会社ハーマンプロ | Concentration combustion device |
-
2017
- 2017-10-11 JP JP2017197338A patent/JP2019070492A/en active Pending
-
2018
- 2018-09-13 CN CN201811071031.0A patent/CN109654720B/en active Active
- 2018-10-09 EP EP18199343.7A patent/EP3470750B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6062848A (en) * | 1998-05-29 | 2000-05-16 | Coen Company, Inc. | Vibration-resistant low NOx burner |
| CN1576694A (en) * | 2003-07-30 | 2005-02-09 | 上海能率有限公司 | Impact forging forming metal combustor and method for producing the same impact forging metal combustion device |
| CN1847729A (en) * | 2005-04-11 | 2006-10-18 | 林内株式会社 | One-can type complex heat source machine |
| CN105091341A (en) * | 2014-05-16 | 2015-11-25 | 林内株式会社 | Heat source machine |
| CN106016692A (en) * | 2015-03-26 | 2016-10-12 | 株式会社能率 | Combustion apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109654720A (en) | 2019-04-19 |
| EP3470750A1 (en) | 2019-04-17 |
| EP3470750B1 (en) | 2020-09-30 |
| JP2019070492A (en) | 2019-05-09 |
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