CN108980828A

CN108980828A - Burner

Info

Publication number: CN108980828A
Application number: CN201810329521.XA
Authority: CN
Inventors: 小代卓史
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2017-05-31
Filing date: 2018-04-13
Publication date: 2018-12-11
Anticipated expiration: 2038-04-13
Also published as: CN108980828B; JP6853115B2; JP2018204808A

Abstract

A kind of burner, the burning gases from the multiple flat burners being arranged in the combustion chamber in burning basket attract using scavenger fan and are discharged to outside, the distribution hole formed from the demarcation plate of the lower surface in combustion chamber is to combustion chamber feeding secondary air, primary air is supplied to introducing port opening up in the standing board erected from the front end of demarcation plate, being connected to the inflow entrance of the lower front part of flat burner via the space between combustion gas menifold and standing board, the number not reducing distribution hole can eliminate the deficiency of primary air.It is provided with the first vent passage and the second vent passage for being connected on the lower part in the space between combustion gas menifold and standing board and top with the exterior space of burning basket.In addition, the rear surface in combustion gas menifold is formed with: the first ramp-like guide surface in face of the first vent passage and the lower part of inclined downward facing forward；And the second ramp-like guide surface in face of the second vent passage and the top of inclined upward facing forward.

Description

Burner

Technical field

The present invention relates to a kind of burner, which has burning basket, in the combustion chamber in burning basket, in cross It is disposed with multiple flat burners upwards, which has longer flame hole on front-rear direction, benefit in upper end It is inhaled with the burning gases that scavenger fan burns and generates to the mixed gas sprayed from the flame hole of above-mentioned flat burner Draw and is discharged to outside.

Background technique

In the past, as this burner, according to patent document 1, known following burner, the burner are firing Burn the demarcation plate that the lower surface of combustion chamber is provided in basket；And from the front end of demarcation plate along the lower front part of flat burner The standing board of standing is offered in standing board and is respectively led with what the inflow entrance of the lower front part opening in each flat burner was connected to Entrance is matched the combustion gas menifold that rear surface is provided projectingly each gas nozzle in face of each introducing port is opposed with the front of standing board It sets, is supplied to the inflow entrance of each flat burner primary empty from the space between combustion gas menifold and standing board via each introducing port Gas, also, via the multiple distribution holes for being formed in demarcation plate and to combustion chamber feeding secondary air.In addition, in the burner In, burning basket is provided with the bottom plate below demarcation plate, marks off between bottom plate and demarcation plate and is opened via on bottom plate If air supply opening and with the air supply chamber that be connected to of exterior space of burning basket, and make space between combustion gas menifold and standing board and this Air supply chamber connection.

In the structure of above-mentioned existing example, the attraction of scavenger fan easy to use will supply indoor air as two Secondary air and supplied via distribution hole to combustion chamber, thus from air supply chamber via the space between combustion gas menifold and standing board to flat The primary air of the inflow entrance supply of flat burner is easy to become insufficient.It is secondary in order to reduce the conduct supplied in indoor air The ratio of the air of air supply and eliminate the deficiency of primary air, it is desirable to reduce the number of distribution hole.However, so that logical Atmidometer increases, therefore, it is necessary to improve rotation speed of the fan, so that power consumption will increase and fan noise will increase.

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2016-29316 bulletin

Summary of the invention

In view of problem above, the issue of the present invention is to provide a kind of burner, which does not reduce distribution hole Number can eliminate the deficiency of primary air.

In order to solve the above problems, burner of the invention has burning basket, in the combustion chamber in burning basket, in cross It is disposed with multiple flat burners upwards, which has longer flame hole on front-rear direction, benefit in upper end It is inhaled with the burning gases that scavenger fan burns and generates to the mixed gas sprayed from the flame hole of above-mentioned flat burner Draw and be discharged to outside, the demarcation plate of the lower surface of combustion chamber is provided in burning basket；And from the front end of demarcation plate along flat The standing board that the lower front part of flat burner erects is offered in standing board and is open with the lower front part in each flat burner Inflow entrance connection each introducing port, the front of combustion gas menifold and standing board is arranged opposite, prominent in the rear surface of the combustion gas menifold Be provided with each gas nozzle in face of each introducing port out, from the space between combustion gas menifold and standing board via each introducing port and to The inflow entrance of each flat burner supplies primary air, also, via the multiple distribution holes for being formed in demarcation plate and to combustion chamber Feeding secondary air, the burner are characterized in that, are provided with the first vent passage, by combustion gas menifold and standing board it Between space lower part with burning basket exterior space be connected to；And second vent passage, it will be between combustion gas menifold and standing board Space top with burning basket exterior space be connected to, be formed with the first ramp-like guidance of lower part in the rear surface of combustion gas menifold At least one party in the second ramp-like guide surface on face and top, wherein the first ramp-like guide surface faces the first vent passage And inclined downward facing forward, the second ramp-like guide surface face the second vent passage and inclined upward facing forward.

According to the present invention, the space between combustion gas menifold and standing board via the first vent passage and the second vent passage and with combustion The exterior space connection for burning basket, therefore, not will receive the influence of the attraction of the scavenger fan to play a role via distribution hole, Air flows into the space between combustion gas menifold and standing board via each vent passage from the exterior space of burning basket, and from the sky Between via introducing port and to the inflow entrance of flat burner supply primary air.Moreover, from the first vent passage and the second vent passage In at least one vent passage flow into primary air along at least one of the first ramp-like guide surface and the second ramp-like guide surface Ramp-like guide surface and flow to introducing port, thus primary air is smoothly fed to the inflow entrance of flat burner.Therefore, do not subtract The number of few distribution hole formed in demarcation plate can eliminate the deficiency of primary air.As a result, exhaust wind can not be improved The revolving speed of fan can prevent the unfavorable condition of power consumption increase, fan noise increase etc.

In addition, in the present invention, in the case where the rear surface of combustion gas menifold is formed with the first ramp-like guide surface, preferably setting The first ramp-like directing plate is set, is extended to the lower end inclined downward facing forward of first ramp-like directing plate from the introducing port, and at this The first vent passage is marked off between first ramp-like directing plate and the first ramp-like guide surface, in addition, in the rear surface shape of combustion gas menifold In the case where having the second ramp-like guide surface, it is preferably provided with the second ramp-like directing plate, the second ramp-like directing plate is from introducing port Upper end nearby obliquely above extends forward, and marks off second between the second ramp-like directing plate and the second ramp-like guide surface Vent passage.Hereby it is possible to which primary air is made swimmingly to flow to introducing port from each vent passage of the first vent passage and the second vent passage.

Preferably, in this case, the interval between the first ramp-like guide surface and the first ramp-like directing plate and second tiltedly At least one of interval between shape guide surface and the second ramp-like directing plate interval becomes larger with front is tended to.Accordingly, more More primary airs can be flowed into the interval for tending to front and becoming larger, so as to increase supply to flat burner The primary air amount of inflow entrance.

Furthermore it is possible in the ramp-like return portion of the front end of the first ramp-like directing plate setting inclined downward backwards, or can be with In the front end of the second ramp-like directing plate, the ramp-like return portion of inclined upward backwards is set.Hereby it is possible to from below, upper direction it is ramp-like Return portion guides and more primary airs is flowed into the first vent passage, the second vent passage.

And, it is preferable that the ramp-like directing plate of at least one of the first ramp-like directing plate and the second ramp-like directing plate with The cross-sectional shape at the corresponding lateral position of each introducing port, in relative to the first ramp-like guide surface and the second ramp-like guide surface With bowing on the direction that the ramp-like guide surface opposed with the ramp-like directing plate is left.Hereby it is possible to keep primary air smooth Ground along ramp-like directing plate each bowing shape portion and flow to each introducing port.

Furthermore it is possible to be formed in the ramp-like guide surface of at least one of the first ramp-like guide surface and the second ramp-like guide surface Concave part, which is located at lateral position corresponding with each introducing port, and extends along the longitudinal direction.Hereby it is possible to make primary Smooth air each introducing port is flowed to along each concave part.

In addition, in the present invention, may be constructed are as follows: it is formed with the second ramp-like guide surface in the rear surface of combustion gas menifold, it is flat Flat burner is made of shade burner, and as flame hole, which includes light flame hole, utilizes the light flame hole The fuel concentration light mixed gas thinner than chemically correct fuel is sprayed；And dense flame hole, using the dense flame hole by fuel The concentration rich mixture body denseer than the fuel concentration of light mixed gas sprays, and as inflow entrance, which includes light fire The light inflow entrance of hungry ghosts who spit fire；And the dense inflow entrance of dense flame hole, it is located at the top of light inflow entrance, as introducing port, Standing board offers: light introducing port is connected to light inflow entrance；And dense introducing port, it is connected to dense inflow entrance, as combustion Gas jets and be provided projectingly in the rear surface of combustion gas menifold in face of the light gas nozzle of light introducing port and in face of dense introducing port Dense gas nozzle in the case where, be formed with concave part in the second ramp-like guide surface, the concave part be located at and horizontally phase The corresponding lateral position of compartment between adjacent each dense introducing port, and extend along the longitudinal direction.Hereby it is possible to make from second The amount that vent passage flows to the primary air of light introducing port increases, and can make supply via dense introducing port to dense inflow entrance one The amount of secondary air is reduced.

Detailed description of the invention

Fig. 1 is the perspective view of the burner of first embodiment of the invention.

Fig. 2 is by the cross-sectional side elevational view after the II-II line cutting in Fig. 1.

Fig. 3 is the enlarged cross-sectional view on the top of the flat burner used in the burner of embodiment.

Fig. 4 is the cross-sectional side elevational view of the major part of the burner of second embodiment.

Fig. 5 is the cross-sectional side elevational view of the major part of the burner of third embodiment.

Fig. 6 is the solid of the major part for removing the state after combustion gas menifold of the burner of third embodiment Figure.

Fig. 7 is the cross-sectional side elevational view of the major part of the burner of the 4th embodiment.

Fig. 8 is the perspective view of the combustion gas menifold used in the burner of the 4th embodiment.

Fig. 9 is the cross-sectional side elevational view of the major part of the burner of the 5th embodiment.

Figure 10 is the perspective view of the combustion gas menifold used in the burner of the 5th embodiment.

Description of symbols

1 ... burning basket, the combustion chamber 1a ..., 2 ... flat burners, 21 ... light flame holes, 22 ... dense flame holes, 23 ... light streams Entrance, 24 ... dense inflow entrances, 3 ... demarcation plates, 31 ... distribution holes, 4 ... standing board, 41 ... light introducing ports, 42 ... dense introducing ports, 6 ... combustion gas menifolds, 61 ... light gas nozzles, 62 ... dense gas nozzles, 7 ... first vent passages, 71 ... first ramp-like guide surfaces, 711 ... concave parts, 72 ... first ramp-like directing plates, 721 ... ramp-like return portions, 722 ... bowing shape portion, 8 ... second lead to Gas circuit, 81 ... second ramp-like guide surfaces, 811 ... concave parts, 82 ... second ramp-like directing plates, 821 ... ramp-like return portions, 822 ... Bowing shape portion.

Specific embodiment

Referring to Fig.1, Fig. 2, the burner of embodiments of the present invention have burning basket 1.Combustion chamber in burning basket 1 In 1a, multiple flat burners 2 are horizontally disposed with, which includes longer on the front-rear direction of upper end Flame hole；And the inflow entrance in lower front part opening.In addition, being set on the front panel portion 11 on the front surface top of burning basket 1 Be equipped with: ignitor 12 and flame rod 13, they face the top of flat burner 2；And observation window 14.Though in addition, not into Row diagram, but the burning gases generated from the mixed gas burning of the flame hole of flat burner 2 ejection are via heat exchange Attracted after device by scavenger fan and is discharged to outside.

As shown in figure 3, the flat burner 2 of present embodiment is made of following shade burner, as flame hole, this is dense Light burner includes light flame hole 21, utilizes the light gaseous mixture that the light flame hole 21 is thinner than chemically correct fuel by fuel concentration Body sprays；And dense flame hole 22, it is located at the both lateral sides of light flame hole 21, using the dense flame hole 22 by fuel concentration ratio The dense rich mixture body of the fuel concentration of light mixed gas sprays, and as inflow entrance, which includes light flame hole 21 Light inflow entrance 23；And the dense inflow entrance 24 of dense flame hole 22, it is located at the top of light inflow entrance 23.In light flame hole Multiple cowling panel 21a are equipped in 21.In addition, being provided in the both sides of light flame hole 21 positioned at light flame hole 21 and dense fire The recirculation zone 21b of mixed gas is not sprayed between hungry ghosts who spit fire 22 and.

The demarcation plate 3 of the lower surface of combustion chamber 1a is provided in burning basket 1；And from the front end of demarcation plate 3 along flat The standing board 4 that the lower front part of burner 2 erects.Multiple distribution holes 31 are formed on demarcation plate 3.Moreover, utilizing exhaust wind The attraction of fan is via above-mentioned distribution hole 31 and to combustion chamber 1a feeding secondary air.In addition, in the present embodiment, being located at and dividing The bottom surface of the burning basket 1 of 3 lower section of partition is opened wide, but also be can use bottom plate and closed bottom surface, so that opening from bottom plate If air supply opening flow into air as auxiliary air via distribution hole 31 and to combustion chamber 1a supply.

It offers in standing board 4 and is respectively communicated with the light inflow entrance 23 of each flat burner 2 and dense inflow entrance 24 Light introducing port 41 and dense introducing port 42.In addition, the front surface in standing board 4 is provided with baffle 5, which has leads with light The opening portion that entrance 41 and dense introducing port 42 are overlapped.In addition, the upper end of standing board 4 is bent forwards and reaches front panel portion 11 Lower end.

Combustion gas menifold 6 and the front of standing board 4 are arranged opposite.It has been provided projectingly in the rear surface of combustion gas menifold 6: in face of each Each light gas nozzle 61 of light introducing port 41；And each dense gas nozzle 62 in face of each dense introducing port 42.Moreover, from each light combustion The combustion gas that gas jets 61 are sprayed is supplied via each light introducing port 41 and to the light inflow entrance 23 of each flat burner 2, also, from combustion Space between gas menifold 6 and standing board 4 supplies one to the light inflow entrance 23 of each flat burner 2 via each light introducing port 41 Secondary air gives birth to the combustion gas and primary air mixing in the mixing access in the flat burner 2 connecting with light inflow entrance 23 At light mixed gas sprayed from light flame hole 21.In addition, the combustion gas sprayed from each dense gas nozzle 62 is via each dense introducing port 42 and supplied to the dense inflow entrance 24 of each flat burner 2, also, the space between combustion gas menifold 6 and standing board 4 is via each Dense introducing port 42 and to the dense inflow entrance 24 of each flat burner 2 supply primary air, it is flat by being connect with dense inflow entrance 24 Combustion gas in mixing access and primary air mixing in burner 2 and the rich mixture body generated is sprayed from dense flame hole 22.

Here, in the present embodiment, the first vent passage 7 is provided with, by the sky between combustion gas menifold 6 and standing board 4 Between lower part with burning basket 1 exterior space be connected to；And second vent passage 8, it will be between combustion gas menifold 6 and standing board 4 The top in space is connected to the exterior space of burning basket 1.In addition, the rear surface in combustion gas menifold 6 is formed with: in face of the first ventilation Road 7 and forward the first ramp-like guide surface 71 of the lower part of inclined downward；And face the second vent passage 8 and inclined upward facing forward Top the second ramp-like guide surface 81.

Accordingly, the space between combustion gas menifold 6 and standing board 4 via the first vent passage 7 and the second vent passage 8 and with burning The exterior space connection of basket 1, therefore, not will receive the shadow of the attraction of the scavenger fan to play a role via distribution hole 31 It rings, air flows into the sky between combustion gas menifold 6 and standing board 4 via each vent passage 7,8 from the exterior space of burning basket 1 Between, primary air is supplied via light introducing port 41 and dense introducing port 42 to the light inflow entrance 23 of flat burner 2 from the space With dense inflow entrance 24.Moreover, the primary air flowed into from the first vent passage 7 and the second vent passage 8 is along the first ramp-like guide surface 71 Flow to light introducing port 41 and dense introducing port 42 with the second ramp-like guide surface 81, thus swimmingly via above-mentioned each introducing port 41, 42 and primary air is supplied to the light inflow entrance 23 of flat burner 2 and dense inflow entrance 24.Therefore, it does not reduce and is formed in separation The number of the distribution hole 31 of plate 3 can eliminate the deficiency of primary air.As a result, without the revolving speed for improving scavenger fan, energy Enough prevent the unfavorable condition of power consumption increase, fan noise increase etc.

Also, it in the present embodiment, is provided with the first ramp-like directing plate 72, from the importing opened up in standing board 4 Mouthful lower end, specifically extend from the lower end inclined downward facing forward of underlying light introducing port 41, and with The first vent passage 7 is marked off between first ramp-like guide surface 71；And the second ramp-like directing plate 82, it is opened from standing board 4 If introducing port upper end nearby, specifically obliquely above prolong forward near the upper end for the dense introducing port 42 being located above It stretches, and marks off the second vent passage 8 between the second ramp-like guide surface 81.Hereby it is possible to make primary air more swimmingly from One vent passage 7 and the second vent passage 8 flow to light introducing port 41 and dense introducing port 42.In addition, in the present embodiment, in order to cut down Number of components makes the first ramp-like directing plate 72 and second the two ramp-like directing plates of ramp-like directing plate 82 and baffle 5 be formed as one Body.

In addition, the interval between the first ramp-like guide surface 71 and the first ramp-like directing plate 72 becomes larger with front is tended to. Hereby it is possible to increase the amount of the primary air flowed into the first vent passage 7, so as to make the light stream to flat burner 2 The primary air amount that entrance 23 supplies increases.Additionally it is possible to make the second ramp-like guide surface 81 and the second ramp-like directing plate 82 it Between interval with tend to front and become larger, so as to make to the dense inflow entrance 24 of flat burner 2 supply primary air Amount increases.

Also, the front end of the first ramp-like directing plate 72 is provided with the ramp-like return portion 721 of inclined downward backwards, also, The front end of second ramp-like directing plate 82 is provided with the ramp-like return portion 821 of inclined upward backwards.Hereby it is possible to from below to oblique Shape return portion 721 guides and more primary airs is flowed into the first vent passage 7, also, can also be ramp-like from upper direction Return portion 821 guides and more primary airs is flowed into the second vent passage 8.

But in the above-described first embodiment, light gas nozzle 61 is arranged are as follows: in face of the up and down direction of light introducing port 41 Center, but second embodiment that can also be as shown in Figure 4 makes position and the first embodiment of light gas nozzle 61 like that It compares and deviates upwards.Accordingly, primary air is easy to enter light introducing port 41 in the lower position of light gas nozzle 61, thus It can make to supply to the primary air amount increase of light inflow entrance 23.Additionally it is possible to by make the position of dense gas nozzle 62 to Lower section deviates and to supply to the primary air amount increase of dense inflow entrance 24.

Next, being illustrated to Fig. 5, third embodiment shown in fig. 6.In the third embodiment, make first tiltedly The cross-sectional shape at the lateral position corresponding with each light introducing port 41 of shape directing plate 72 relative to the first ramp-like directing plate With bowing on the direction that 72 the first opposed ramp-like guide surfaces 71 are left, and make the second ramp-like directing plate 82 dense leads with each The cross-sectional shape at the corresponding lateral position of entrance 42 is also drawing relative to first opposed with the second ramp-like directing plate 82 is ramp-like With bowing on the direction that guide face 81 leaves.Hereby it is possible to make primary air swimmingly along the first ramp-like directing plate 72 and Each bowing shape portion 722,822 of two ramp-like directing plates 82 and flowed to light introducing port 41 and dense introducing port 42.In addition, can Only to make a rectangular shape as third embodiment of the first ramp-like directing plate 72 and the second ramp-like directing plate 82.

Next, being illustrated to Fig. 7, the 4th embodiment shown in Fig. 8.In the fourth embodiment, tiltedly first Concave part 711 is formed in shape guide surface 71, the concave part 711 be located at lateral position corresponding with each light introducing port 41, i.e. with The corresponding lateral position of each light gas nozzle 61 and extend along the longitudinal direction.Hereby it is possible to make primary air swimmingly along each recessed Groove portion 711 is flowed to each light introducing port 41.Furthermore, it is possible to concave part is formed in the second ramp-like guide surface 81, the groove position Extend in lateral position corresponding with each dense introducing port 42 and along the longitudinal direction.Hereby it is possible to make primary air swimmingly to each Dense introducing port 42 flows.

Next, being illustrated to Fig. 9, the 5th embodiment shown in Fig. 10.In the 5th embodiment, tiltedly second Concave part 811 is formed in shape guide surface 81, the concave part 811 be located at horizontally adjacent each dense introducing port 42,42 it Between the corresponding lateral position of compartment, the compartment i.e. between horizontally adjacent each dense gas nozzle 62,62 Corresponding transverse direction and extends position along the longitudinal direction.Accordingly, lower section is readily flowed to along the primary air that concave part 811 flows Light introducing port 41.Therefore, the amount for flowing to the primary air of light introducing port 41 from the second vent passage 8 can be made to increase, and can be subtracted It is few to be supplied via dense introducing port 42 to the amount of the primary air of dense inflow entrance 24.Thereby, it is possible to suitably to rich mixture body Air-fuel ratio be adjusted.

Embodiments of the present invention are illustrated above by reference to attached drawing, but the present invention is not limited to this.For example, In above embodiment, the rear surface of combustion gas menifold 6 be formed with the first ramp-like guide surface 71 and the second ramp-like guide surface 81 this Two ramp-like guide surfaces, but can also only form a side of the first ramp-like guide surface 71 and the second ramp-like guide surface 81.In addition, In above embodiment, flat burner 2 is made of shade burner, but can also be made of common Ben Shengshi burner flat Flat burner.In this case, as long as opening up the single stream being open with the lower front part in each flat burner in standing board 4 The introducing port of entrance connection, and so that primary air is flowed to the introducing port via the first vent passage 7 and the second vent passage 8.

Claims

1. a kind of burner has burning basket, in the combustion chamber in burning basket, horizontally it is disposed with multiple flat Flat burner, the flat burner have longer flame hole on front-rear direction in upper end, using scavenger fan to from described flat The burning gases that the mixed gas that the flame hole of flat burner sprays is burnt and generated attract and are discharged to outside, are being burnt The demarcation plate of the lower surface of combustion chamber is provided in basket；And it is vertical along the lower front part of flat burner from the front end of demarcation plate The standing board risen offers each importing being connected to the inflow entrance of the lower front part opening in each flat burner in standing board Mouthful, the front of combustion gas menifold and standing board is arranged opposite, has been provided projectingly in the rear surface of the combustion gas menifold in face of each introducing port Each gas nozzle, from the space between combustion gas menifold and standing board via each introducing port and to the inflow entrance of each flat burner Primary air is supplied, also, via the multiple distribution holes for being formed in demarcation plate and to combustion chamber feeding secondary air,

The burner is characterized in that,

The burner is provided with the first vent passage, by the lower part in the space between combustion gas menifold and standing board and burning The exterior space connection of basket；And second vent passage, by the top in the space between combustion gas menifold and standing board and burning basket Exterior space connection,

It is formed in the first ramp-like guide surface of lower part and the second ramp-like guide surface on top in the rear surface of combustion gas menifold At least one party, wherein the first ramp-like guide surface faces the first vent passage and inclined downward facing forward, the second ramp-like guidance Face faces the second vent passage and inclined upward facing forward.

2. burner according to claim 1, which is characterized in that

It is formed with the described first ramp-like guide surface in the rear surface of the combustion gas menifold, it is ramp-like that the burner is provided with first Directing plate extends to the lower end inclined downward facing forward of first ramp-like directing plate from the introducing port, and this first tiltedly First vent passage is marked off between shape directing plate and the first ramp-like guide surface.

3. burner according to claim 2, which is characterized in that

Interval between the first ramp-like guide surface and the first ramp-like directing plate becomes larger with front is tended to.

4. burner according to claim 2 or 3, which is characterized in that

The front end of described first ramp-like directing plate is provided with the ramp-like return portion of inclined downward backwards.

5. burner according to claim 2 or 3, which is characterized in that

The cross-sectional shape at the lateral position corresponding with each introducing port of the first ramp-like directing plate, relative to described With bowing on the direction that first ramp-like guide surface is left.

6. burner according to claim 1, which is characterized in that

It is formed with the described first ramp-like guide surface in the rear surface of the combustion gas menifold, is formed in the first ramp-like guide surface recessed Groove portion, which is located at lateral position corresponding with each introducing port, and extends along the longitudinal direction.

7. burner according to claim 1, which is characterized in that

It is formed with the described second ramp-like guide surface in the rear surface of the combustion gas menifold, it is ramp-like that the burner is provided with second Directing plate, the second ramp-like directing plate obliquely above extend forward from the lower end of the introducing port, and this second tiltedly Second vent passage is marked off between shape directing plate and the second ramp-like guide surface.

8. burner according to claim 7, which is characterized in that

Interval between the second ramp-like guide surface and the second ramp-like directing plate becomes larger with front is tended to.

9. burner according to claim 7 or 8, which is characterized in that

The front end of described second ramp-like directing plate is provided with the ramp-like return portion of inclined upward backwards.

10. burner according to claim 7 or 8, which is characterized in that

The cross-sectional shape at the lateral position corresponding with each introducing port of the second ramp-like directing plate, relative to described With bowing on the direction that second ramp-like guide surface is left.

11. burner according to claim 1, which is characterized in that

It is formed with the described second ramp-like guide surface in the rear surface of the combustion gas menifold, is formed in the second ramp-like guide surface fluted Portion, which is located at lateral position corresponding with each introducing port, and extends along the longitudinal direction.

12. burner according to claim 1, which is characterized in that

It is formed with the described second ramp-like guide surface in the rear surface of the combustion gas menifold, the flat burner is by shade burner It constitutes, as the flame hole, which includes light flame hole, using the light flame hole by fuel concentration than theoretical The thin light mixed gas of air-fuel ratio sprays；And dense flame hole, using the dense flame hole by fuel concentration than light mixed gas The dense rich mixture body of fuel concentration spray, as the inflow entrance, which includes the light stream of light flame hole Entrance；And the dense inflow entrance of dense flame hole, it is located at the top of light inflow entrance, as the introducing port, in the standing Offer on plate: light introducing port is connected to light inflow entrance；And dense introducing port, it is connected to dense inflow entrance, as the combustion Gas jets are provided projectingly in face of the light gas nozzle of light introducing port in the rear surface of the combustion gas menifold and lead in face of dense The dense gas nozzle of entrance is formed with concave part in the second ramp-like guide surface, the concave part be located at it is horizontally adjacent The corresponding lateral position of compartment between each dense introducing port, and extend along the longitudinal direction.