CN1160141A

CN1160141A - Mixer tube assembly for fuel gas burner

Info

Publication number: CN1160141A
Application number: CN 97110294
Authority: CN
Inventors: D·J·科亚蒂克
Original assignee: Eaton Corp
Current assignee: Eaton Corp
Priority date: 1996-03-01
Filing date: 1997-03-01
Publication date: 1997-09-24
Also published as: BR9700327A; EP0793058A2; CA2198761A1; EP0793058A3; MX9701418A

Abstract

A fuel/air mixture tube assembly for interconnecting a range top burner with a fuel gas manifold. The tube is preferably formed by stamping half shells from thin sheet metal and joining the half shells to form a tube having an inlet for connection to the manifold and an outlet for connection to the burner inlet. An inlet flap or door is integrally stamped in the half shells adjacent the inlet end. After assembly the flap or door may be mechanically deformed to vary the air inlet opening.

Description

The mixer tube assembly of gaseous fuel burners

The present invention relates to a kind of fuel/air mixture supply pipe of culinary gas burner, especially the fuel/air mixture supply pipe of the gas burner on the stove and accessory top in the household cooking device.

Stove and accessory top burner assembly is communicated with fuel gas source with a mixing tube usually, for example the supply main who is communicated with each burner of stove and accessory top.Mixer tube assembly has an aspirator that sucks air, inhaled air with flow through the pipe that is connected between house steward and burner in the gas-flow mixing, for the burning of burner provides required fuel/air mixture.

Before this, this burner tube assembly at stove and accessory top adopts rotary valve, this class rotary valve can be the rotating shutter formula that the expansion intake section at pipe is processed into, it also can be the sleeving valve formula that is contained on the tube wall aperture, these two kinds of technology that the fuel/air mixture of stove and accessory top burner is regulated all need moving valve assembly separately to come fuel metering/air mixture to described pipe with being connected to the arrival end of total mouth of pipe, thereby itself just cause production cost to increase, consider annex expense and mounting cost, especially true when producing Domestic stove in enormous quantities.

When design of family expenses stove and accessory top burner and production, must allow stove and accessory prepare to use natural gas or liquefied petroleum gas (LPG), every kind of gas all may need the air intake valve member of the fuel/air that mixes in the burner supply pipe is carried out different adjustings, provides the most effective burning and suitable flame characteristics so that at burner flame a mouthful place takes place.Therefore, must regulate the fuel/air mixture mixing ratio of stove and accessory top burner.

So thirst for having a kind of method or device to regulate the air intake that the stove and accessory top burner is supplied the fuel/air mixture in the mixing tube for a long time always, and provide a kind of and be easy to comparatively speaking to produce, air intake adjusting device that cost is minimum.

The invention provides a kind of fuel assembly that stove and accessory top gas fuel burner is communicated to gas supply source (for example house steward).The present invention is drawn into air from house steward and flows to the combustion gas of burner, and the present invention makes the air capacity that enters adjusted, so that provide suitable fuel/air mixture for required burner flame characteristic.

The present invention provides a kind of fuel/air mixture electric hybrid module to gaseous fuel burners, wherein mixer tube assembly preferably is made up of two and half housings, each half housing is formed by the sheeting punching press, two and half housings combine, and form one and have one and be used for the arrival end that connects with fuel gas source (for example house steward) and an air mixing tube that is used for the corresponding port of export that is connected with the burner inlet end.A baffle plate or a door that allows inhaled air enter is arranged in the place of neighboring entry end.This baffle plate or door can be out of shape after the assembling, to regulate the cross section of air intake.Therefore the present invention provides a kind of technology of unique novelty of fuel of producing top combustion burner with least cost.In preferred embodiment, on per two fine sheets, strike out half housing of a plurality of pipes one by one, form a plurality of burner tube assemblies through merging sheet material, however, also can make single mixing tube if desired.

Fig. 1 represents the stereogram of burner mixer tube assembly of the present invention;

Fig. 2 is an assembly arrival end enlarged drawing shown in Figure 1;

Fig. 3 is the phantom along the 3-3 hatching of Fig. 1.

With reference to Fig. 1,10 expressions mixer tube assembly of the present invention, it comprises first and second or the upper and lower housing of making than fine sheet shown in the

label

12,14, the most handy.

With reference to Fig. 1, upper shell 12 preferably has one and half housings usually, and upper shell has the parts of some best drawing, for example, groove or cavity, these parts are numbered, 16 expression arrival end parts, 18 expression jet pipe parts, 20 represent port of export part.In this preferred embodiment, intake section enlarges, and forms a plenum chamber; Jet pipe 18 is the reducing and expansion jet pipes with throat 22, and the enlarged in throat downstream and constriction or tapered portion 20 form an integral body.Lower house 14 has corresponding fixing groove 24, and groove 24 is relative with intake section 16, and links to each other with the throat 26 that is connected divergent nozzle part 28.

With reference to Fig. 3, divergent nozzle part 28 links to each other with the exit portion 30 in flange connector aperture 32, this flange aperture is formed on the upper half-shell 32, have on it by arbitrary suitable mode fixing outlet or pipe joint 34, for example push or the mode expanded or fix by welding manner by instrument of insertion in outlet flange 32.

With reference to Fig. 1, lower house 14 has another intake section 36 corresponding with intake section 16, and intake section 36 is tapered towards the throat 38 corresponding with another throat 40 of upper shell 12.Lower house 14 has a Curtis nozzle part 42 corresponding with the jet pipe part 18 of upper shell in addition.The jet pipe 42 of lower house is communicated with that another is corresponding with exit portion 30 and be positioned at exit portion 44 under the exit portion 20.The exit portion 44 of lower house 14 links to each other with the second outlet flange on the upper shell that Fig. 1 dotted line is represented.Outlet or pipe joint 48 are connected on flange 46 tops and fix with the fixed form of similar pipe joint 34.Therefore, upper and lower casing cooperates a pair of burner tube with

import

50,52 and outlet or pipe joint 34,48 of formation, the inlet (not shown) that each burner can be installed on the pipe joint 34,48.

Obviously, upper and

lower casing

12,14 can link together by any suitable method (for example resistance welded or flow of metal).

With reference to Fig. 2, the arrival end 50 of one of mixing tube is exaggerated and illustrates, wherein the inlet draft chamber of upper shell have one with upper shell baffle plate in aggregates or door 54, door preferably is stamped to form by upper shell, solid line position is deformed to dotted line position among the Men Nengcong figure.Obviously door can be out of shape with suitable arbitrarily mechanical means, for example, and the position that allows door be positioned at out, the position of opening with the instrument adjustment doors of simple similar screwdriver, pliers and so on afterwards according to the needs of conversion air stream.In preferred embodiment of the present invention, second baffle or door 56 are also processed in the intake section 24 of lower house 14, can be with similar above-mentioned method adjustment for door 54.Though comprised a pair of mixing tube that is used for two burners in the illustrated embodiment, obviously the present invention also can implement when single burner tube.In other words, especially for single tube, obviously this pipe can be by a sheet material roll forming, and without the combination of two halves shell.

For example, under the situation of the single mixing tube of roll forming, inlet air plenum and baffle plate or the available stamped from sheetstock of door form, and the roll extrusion tubulation welds side seam more then.

Therefore, the present invention provides a kind of with sheet material, preferably made an air fuel mixing tube and housing is joined together to form a unique novel method with mixing tube of entrance and exit by a pair of punching press housing for gaseous fuel burners.Have a baffle plate or door in the intake section of at least one housing, this door can mechanically deform, so that be the mixing adjustment air intake of air, fuel.

Although with reference to there being illustrated enforcement that the present invention has been made detailed description, obviously the present invention can modifications and variations, do not exceed the protection domain of following claim.

Claims

1, a kind of adjustable aspirator of gaseous fuel burners comprises:

(a) one its a certain specific part is made into can the semicanal of half fuel form by one than integrally formed first housing of fine sheet, a housing has an entrance point and a port of export;

(b) one by one than integrally formed second housing of fine sheet, its a certain specific part is made into can the semicanal of half fuel form, second housing has an entrance point and a port of export, and the local integral body that is positioned at the neighboring entry end is formed with a baffle plate or door;

(c) be used for described first and second housings are fixed together; Make their specific part form one and have the inlet that is suitable for connecting fuel gas source and the operating means with the outlet that is suitable for being connected burner, wherein said baffle plate or door are deformables, so that change the air intake hole in the described pipe.

2, assembly as claimed in claim 1 is characterized in that in described at least first and second housings has a flange, and this flange is in the corresponding both sides of the described specific part of housing.

3, assembly as claimed in claim 1 is characterized in that described first housing comprises some described specific parts; Described second housing comprises that the described specific part of some and described first housing is corresponding and fits in the described specific part of some air/fuel mixing tubes.

4, assembly as claimed in claim 1 is characterized in that the described specific part of at least one described housing comprises the whole formation of the described sheet material of usefulness, also base is gone up the pipe-type outlet part of stretching out perpendicular to described sheet material.

5, assembly as claimed in claim 1 is characterized in that, one in described at least first and second housings has described specific part, forms a reducing and expansion jet pipe thereby process this specific part between the import and the port of export.

6, assembly as claimed in claim 1, each that it is characterized in that described first and second housings all has described specific part, and they limit a reducing and expansion jet pipe that is positioned at the described tube inlet and the port of export in conjunction with the back.

7, assembly as claimed in claim 1 is characterized in that the described determining section of described second housing has an enlarged in the place of contiguous described arrival end, and described baffle plate or door are formed on the described enlarged.

8, a kind of method of making the air-breathing organ pipe of gaseous fuel burners comprises:

(a) process first tubular shell that has an arrival end and a port of export with one than fine sheet;

(b) process second tubular shell of an arrival end and a port of export with one than fine sheet, and near arrival end, process a baffle plate or door;

(c) described first and second housings are combined together to form a tubular element, make described baffle plate or door distortion, change the aspirator air openings.

9, method as claimed in claim 8 is characterized in that described integrating step comprises welding.

10, method as claimed in claim 8 is characterized in that the step of described processing first housing and the step of described processing second housing are included in flange of each offside processing of described housing.

11, method as claimed in claim 8 is characterized in that the procedure of processing of described first housing is included in reducing and expansion jet pipe part of processing between the described arrival end and the described port of export.

12, method as claimed in claim 8 is characterized in that the described step of processing described first housing comprises processing one and half housings.

13, a kind of method of making the air-breathing organ pipe of gaseous fuel burners comprises:

(a) have by one of sheet material processing and be suitable for connecting an entrance point of fuel gas source and have the suitable tubular part that is connected a port of export of burner;

(b) at inlet plenum of the arrival end place of contiguous described tubular part processing;

(c) one of processing and described inlet plenum baffle plate in aggregates or;

(d) make described baffle plate or door distortion, change the air intlet aperture.

14, the method for claim 1 is characterized in that the step of the described tubular assembly of described processing is included in reducing and expansion jet pipe of processing between the arrival end and the port of export.

15, a kind of method of making the air-breathing organ pipe of gaseous fuel burners comprises:

(a) process a inlet plenum with a sheet material with a baffle plate or door;

(b) the described sheet material of rolling and processing and process the air-breathing organ pipe that one one end has inlet plenum, and connect pipe seam; And

(c) make baffle plate or door distortion, change the air intake aperture.