CN105737151A

CN105737151A - Combustion device

Info

Publication number: CN105737151A
Application number: CN201510920609.5A
Authority: CN
Inventors: 小野贵大
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2014-12-26
Filing date: 2015-12-11
Publication date: 2016-07-06
Anticipated expiration: 2035-12-11
Also published as: CN105737151B; TW201623878A; JP6534811B2; BR102015031378B1; BR102015031378A2; TWI563222B; JP2016125681A

Abstract

The present invention provides a combustion device. In the combustion device, the upper end of a flame outlet can eject a mixed gas, the anterio-posterior direction is adopted as the length direction of burners (5). Inside a combustion chamber (2), a plurality of burners (5) are laterally arranged side by side inside the combustion chamber (2) at intervals. A propagating combustion plate (18) is arranged in a gap between every two burners respectively, wherein the propagating combustion plate (18) is positioned nearby the upstream end of one of the front and rear end portions of a flame outlet formation region of each burner along the front-back direction to block the uprising the secondary air. In this way, even when the gap between each burner and the corresponding propagating combustion plate is widened due to the error of the lateral width of the burner/propagating combustion plate, the degradation of the propagating combustion performance is avoided. The other end portion of each propagating combustion plate (18) in the anterio-posterior direction is provided with a bending portion (18a) that is bent downwards. As a result, the swirl is hard to reach the upper ends of the burners (5).

Description

Burner

Technical field

The present invention relates to a kind of burner, this burner has burning cover, the air supply chamber on the downside of combustor and combustor it is provided with in burning cover, having the flame hole of ejection gaseous mixture in upper end and be set up in parallel multiple in the way of transverse direction has and arranges with gap in combustor with the burner that fore-and-aft direction is length direction, auxiliary air rises from air supply chamber and is supplied to combustor.

Background technology

Up to the present, known in this burner, gap between each burner is configured with and prolongs burning plate, this prolongs burning plate and is positioned near the upper end of the fore-and-aft direction part overlapping with an end of the rear ends in the flame hole of each burner formation region, hinders the rising (referring for example to patent documentation 1) of auxiliary air.According to this burner, auxiliary air is difficult in flow to prolong the surface part burning plate, therefore when prolonging burning, a part for the gaseous mixture that the part for gaseous mixture sprayed from the flame hole of a burner adjacent across gap and the flame hole from another burner spray is stranded in prolongs the surface part burning plate, promotes that fire prolongs burning from a burner to another burner.

But, prolonging another end burning plate fore-and-aft direction (when prolonging burning plate and being configured at the fore-and-aft direction part overlapping with the rearward end in flame hole formation region, for prolonging the leading section burning plate, when prolonging burning plate and being configured at the fore-and-aft direction part overlapping with the leading section in flame hole formation region, for prolonging the rearward end burning plate) near, the air-flow of auxiliary air upward will produce vortex.Afterwards, if this vortex arrives the upper end of burner, then by the impact of vortex, bring baneful influence can to the flammability of burner, but, this was not taken some countermeasures in the past.

At first technical literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 5-280715 publication

Summary of the invention

Given this present invention makes, it is therefore intended that providing a kind of burner, the vortex that this burner is prevented from prolonging the auxiliary air produced near the end burning plate causes that flammability deteriorates.

In order to solve the problems referred to above, the burner of the present invention has burning cover, the air supply chamber on the downside of combustor and combustor it is provided with in burning cover, upper end has the flame hole of ejection gaseous mixture and is set side by side with multiple in combustor in the way of transverse direction has and arranges with gap with the burner that fore-and-aft direction is length direction, auxiliary air rises from air supply chamber and is supplied to combustor, gap between each burner is configured with and prolongs burning plate, this prolongs burning plate and is positioned near the upper end of the fore-and-aft direction part overlapping with an end of the rear ends in the flame hole of each burner formation region, hinder the rising of auxiliary air, it is characterized in that: be formed with, in another end prolonging the rear ends burning plate, the kink bent downwards.

According to the present invention, the air-flow of auxiliary air upward produces vortex at the lower end of kink.Therefore, the generation position of vortex is displaced to lower section, and vortex is difficult to arrive the upper end of burner, it is possible to prevent the flammability of burner from being deteriorated by the impact of vortex.

Burner has burner pressing plate, this burner pressing plate abuts with an ora terminalis of the front and back ora terminalis of burner, or there is thermal insulation board, the inner surface of the ratio burner of an exterior panel of the front and back exterior panel of burning cover part by the top is covered by this thermal insulation board in the way of to have gap with it.In such burner, it is preferable that form at the upper limb of burner pressing plate or the lower edge of thermal insulation board and prolong burning plate.Thereby, it is possible to cut down number of components and reduce cost.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the burner of first embodiment of the present invention.

Fig. 2 is the side sectional view of the burner of the 1st embodiment.

Fig. 3 wants portion's enlarged section along what the III-III line of Fig. 2 was decided what is right and what is wrong.

Fig. 4 is disposed on the axonometric chart of the burner of the burner of the 1st embodiment.

Fig. 5 is the sectional view of the burner decided what is right and what is wrong along the V-V line of Fig. 4.

Fig. 6 is disposed on the axonometric chart of the burner pressing plate of the burner of the 1st embodiment.

Fig. 7 is the side sectional view of the burner of the 2nd embodiment.

Fig. 8 is disposed on the axonometric chart of the thermal insulation board of the burner of the 2nd embodiment.

Symbol description

1 ... burning cover, 12 ... the exterior panel of rear surface, 15 ... cover the thermal insulation board of exterior panel of rear surface, 17 ... burner pressing plate, 18 ... prolong burning plate, 18a ... kink, 2 ... combustor, 3 ... air supply chamber, 5 ... burner, 53 ... flame hole.

Detailed description of the invention

With reference to Fig. 1, Fig. 2,1 represents the burning cover constituting the burner being made up of supply hot water heat source machine.The upper surface of burning cover 1 is open, arranges the supply hot-water converter eliminating diagram and be used as heating object on burning cover 1.The air supply chamber 3 on the downside of combustor 2 and combustor 2 it is provided with in burning cover 1.Air supply chamber 3 is kept apart by division board 4 with combustor 2.So that laterally having the mode arranged with gap is set side by side with multiple burner 5 being length direction with fore-and-aft direction in combustor 2.

The bottom surface of air supply chamber 3 is connected to the combustion blower outside figure, supplies air from combustion blower to air supply chamber 3.Division board 4 is formed multiple distribution hole 41.And, the air being supplied to air supply chamber 3 rises to combustor 2 via these distribution holes 41 and is taken as secondary air supply to combustor 2.

Additionally, the standing board portion 42 being provided with in the front end of division board 4 bending upward, the upper plate portion 43 of exterior panel 11 of front surface that forwards bends and arrive burning cover 1 from the upper end in standing board portion 42.And, the primary air room 31 erectting formation in the way of arriving upper plate portion 43 in the front side in standing board portion 42 it is provided with in the leading section of air supply chamber 3.Standing board portion 42 is formed each opening 44 of the inflow entrance 54a of the upstream extremity in the mixing tube portion 54 described later in the face of each burner 5.Additionally, the front surface of primary air room 31 is blocked by gas manifold 6.Being provided with each nozzle 61 relative with each opening 44 on gas manifold 6, the mixing tube portion 54 of each opening 44, i.e. each burner 5 is supplied fuel gas from each nozzle 61 and is supplied primary air from primary air room 31.It addition, be configured with the column of flame 7, ignitor 8 and observation window 9 on the exterior panel 11 of the front surface of burning cover 1.Additionally, Fig. 1 eliminates gas manifold 6.

It addition, the exterior panel part that the upper end of the ratio burner 5 of burning cover 1 is by the top is heated strongly because of the burning of burner 5.Therefore, in order to ensure the thermostability of burning cover 1, it is provided with the thermal insulation board 14,15,16 of front side, rear side and the left and right sides that the inner surface of the upper end part by the top of the ratio burner 5 of the exterior panel 13 of the exterior panel 11 of the front surface to burning cover 1, the exterior panel 12 of rear surface and left and right sides covers in the way of to have gap with it.And, in order to burner 5 is positioned, in burning cover 1, it is provided with the burner pressing plate 17 that the end edge with burner 5 abuts.

With reference to Fig. 4, Fig. 5, burner 5 has: have transversely opposed pair of side plates 51a, 51a burner body 51, there is the burner cap 52 from the pair of side plates 52a of outer side covers burner body 51 of both lateral sides, 52a.And, upper end at burner 5, flame hole 53 as ejection gaseous mixture is provided with main flame hole 53a and side fire flame hole 53b, main flame hole 53a is formed multiple on the upper plate 51b of the upper end of biside plate 51a, 51a of linking burner body 51 in the way of fore-and-aft direction exists interval, and side fire flame hole 53b is formed between each side plate 51a and each side plate 52a of burner cap 52 of burner body 51.

It addition, be provided with the mixing tube portion 54 of the bottom rearward extended of the inflow entrance 54a from front end on burner body 51, extend the main mixture path 55 extended upward on one side from the rearward end in mixing tube portion 54 on one side along the longitudinal direction.Further, it is directed into main flame hole 53a from the gaseous mixture of the inflow entrance 54a fuel gas flowed into primary air via mixing tube portion 54 and main mixture path 55.And, biside plate 51a, 51a of burner body 51 and upper plate 51b are formed by one block of plate is bent.

Between each side plate 51a and each side plate 52a of burner cap 52 of burner body 51, it is provided with the side fire gaseous mixture path 56 being connected with side fire flame hole 53b.In addition, each side plate 51a of burner body 51 is formed multiple passage 56a, multiple passage 56a are positioned at the overlapping part in the bottom than each side plate 52a of burner cap 52 position by the top, connection main mixture path 55 and side fire gaseous mixture path 56, and at fore-and-aft direction, there is interval.And, it is fed into side fire flame hole 53b via these passages 56a gaseous mixture tapped by side fire gaseous mixture path 56 from main mixture path 55, carries out protecting flame to the main flame formed on main flame hole 53a by the side fire formed on the fire flame hole 53b of side.

It addition, form the groove portion 57 of oriented laterally inboard depression on each side plate 52a of burner cap 52, groove portion 57 is positioned at than passage 56a position by the top.Thus, it is flowed into the gaseous mixture of side fire gaseous mixture path 56 be distributed along the longitudinal direction from passage 56a than groove portion 57 part on the lower, it can be ensured that from the uniformity of the gaseous mixture of side fire flame hole 53b ejection distribution in the longitudinal direction.Additionally, burner cap 52 has bridge portion 52b, bridge portion 52b, by the upper end of biside plate 52a, 52a, in front and back, multiple positions link up.And, the rear end lower at burner body 51 is formed with the indentation 58 that burner pressing plate 17 engages.

When burning starts, it is necessary to carry out prolonging burning from the burner 5 in the face of ignitor 8 to other burners 5.Therefore, the gap between each burner 5,5 is provided with and prolongs burning plate 18, prolong burning plate 18 and be positioned near the upper end of the overlapping fore-and-aft direction part of the rearward end forming region with the flame hole of each burner 5, hinder the rising of auxiliary air.Thus, auxiliary air is difficult in flow to prolong the surface part burning plate 18, therefore, when prolonging burning, a part for the gaseous mixture that the part for gaseous mixture sprayed from the flame hole 53 of a burner 5 adjacent across gap and the flame hole 53 from another burner 5 spray is stranded in prolongs the surface part burning plate 18, promotes that fire prolongs burning from a burner 5 to another burner 5.

Additionally, prolonging near the front end burning plate 18, the air-flow of auxiliary air upward will produce vortex.Further, if this vortex arrives the upper end of burner 5, then by the impact of vortex, the flammability of burner 5 is brought baneful influence.

Therefore, in the present embodiment, it is formed with, in the leading section prolonging burning plate 18, the kink 18a bent downwards.Thus, the lower end at kink 18a is produced by vortex.Therefore, the generation position of vortex offsets downwards, and vortex is difficult to arrive the upper end of burner 5, it is possible to prevent the flammability of burner 5 from being deteriorated by the impact of vortex.

It addition, in the present embodiment, prolong, as it is shown on figure 3, be inserted with in the above-mentioned groove portion 57 of each side plate 52a being formed at burner cap 52, the side edge part burning plate 18.Thus, even if burner 5, prolong the error of transverse width burning plate 18 make the side, groove portion 57 of each burner 5 and prolong the lateral margin burning plate 18 between gap broaden, also can to transverse curvature in groove portion 57 from the stream prolonging the auxiliary air that the lower section burning plate 18 arrives top via gap, therefore, aeration resistance becomes big, and the flow flowing the auxiliary air to the top prolonging burning plate 18 can't increase too much.And, towards prolonging that the air-flow of auxiliary air of the top burning plate 18 is given cross stream component by groove portion 57 and the impetus upward dies down.Therefore, be stranded in prolong the gaseous mixture of surface part burning plate 18 will not be blown fly too many, it is possible to being effectively prevented burning extension can deteriorate.

It addition, in the present embodiment, as shown in Figure 6, the upper limb of burner pressing plate 17 be integrally formed with prolong burning plate 18.Thereby, it is possible to reduction number of components, thus reduce cost.

Then, the 2nd embodiment shown in Fig. 7, Fig. 8 is illustrated.The essential structure of the 2nd embodiment is not different especially from above-mentioned 1st embodiment, gives symbol same as described above to the component site identical with the 1st embodiment.The difference of the 2nd embodiment and the 1st embodiment is in that: the lower edge of the thermal insulation board 15 of the rear side that the inner surface of the upper end of the ratio burner 5 of the exterior panel 12 in the rear surface to burning cover 1 part by the top covers in the way of to have gap with it, is integrally formed with and prolongs burning plate 18.Even such structure, it is also possible to cut down number of components, thus reducing cost.

Above, with reference to accompanying drawing, embodiments of the present invention are illustrated, but, the present invention is not limited to this.Burn plate be configured to for example, it is also possible to gap between each burner 5,5 will be prolonged: be positioned near the upper end of the overlapping fore-and-aft direction part in the leading section forming region with the flame hole of each burner 5.Now, as long as forming kink prolonging the rearward end burning plate.Additionally, for using the burner of the burner without burner cap can also apply the present invention equally as burner.

Claims

1. a burner, there is burning cover, the air supply chamber on the downside of combustor and combustor it is provided with in burning cover, upper end has the flame hole of ejection gaseous mixture and is set side by side with multiple in combustor in the way of transverse direction has and arranges with gap with the burner that fore-and-aft direction is length direction, auxiliary air rises from air supply chamber and is supplied to combustor, gap between each burner is configured with and prolongs burning plate, this prolongs burning plate and is positioned near the upper end of the fore-and-aft direction part overlapping with an end of the rear ends in the flame hole of each burner formation region, hinder the rising of auxiliary air, it is characterized in that:

It is formed with the kink bent downwards in another end prolonging the rear ends burning plate.

2. burner according to claim 1, it is characterised in that:

There is the burner pressing plate that an ora terminalis of the front and back ora terminalis with described burner abuts, described in being integrally formed with at the upper limb of burner pressing plate, prolong burning plate.

3. burner according to claim 1, it is characterised in that:

Having thermal insulation board, the inner surface of burner part by the top described in the ratio of an exterior panel of the front and back exterior panel of described burning cover is covered by this thermal insulation board in the way of to have gap with it, prolongs burning plate described in being integrally formed with at the lower edge of this thermal insulation board.