US2456673A - Oil burner blower housing - Google Patents

Description

Dec. 21, 1948. E. CAMERINO OIL BURNER BLOWER HOUSING Filed May 14, 1947 O. Row R E W G I?! A M/p Y B QM Q K JQ Patented Dec. 21, 1948 UNITED PATENT OFFICE on; BURNER BLOWER HQU$ING Em stCamerin Ne o k, Y-

'AnnliootionvMav 14; 1947, Serial No,- 748M139.

7. Claims.

This invention" relates to oilaburners enamorep r l y to n improved oib burner blower housing.

The invention providesimprovements-open the blower unit disclosed and claimed: inrmy Patent No. 2,095,230, issued October 12; WSW."

An object of the invention 15th} rovide a. compact blower housing having a: lonser-airrpath.

rectangular section being divided. by: aipartition. into two separate air chambers, andrat least one.

intermediate air chamber disposedon the side of the rectangular. section for: establishing aniaincommunicating passage between said two:chambers.

Another object of the iHVBIItiOHiiS,'-t0 provide-a compact burner housingwhich:.supplies atturbualent air stream' of relatively. low velocity to: a

relatively short blast tube; suohstreamzmixing and burning with an atomized sprayof'oilitoproduce a relatively quiet flame of desired shape.

A further object is to-provideacompact burnerhousing having an automatic damper; on the disrcharge side ofthe-air impeller'or-fan; and; pref-..

erably in the intermediate chamber, for regulating the pressure, or the maximum. flowrof air; or both, during an operative burnerperiod; and for preventing the now ore-natural chimney draft through the burnerihousing during an inoperative burner period;

Other objects and novel featureswill beoome apparent from the followlngdes-crlptionand accompanying drawings, in which? Fig. 1 is a side elevational'view; partly-insec tion, of an oil burnerblowerhouslngembodyingthe features of this invention;

Fig. 2 is a rearelevationa-l view; p'artlyin section, taken from the left of Fig. 1; and

Fig. 3is a plan viewalong the line 3.-.-3 of Fig. 1.

With referenoeto Fi ....1,,.the. blower housing H comprises an upper semi cylindrical impeller portion I- having: downwardly converging front and rear walls l2 and I 4, respectively; and substantially parallel-side-Walls l6. and, [8, respectively. A rectangular bottom wall 20, integrally formed with the side, front and rear walls; forms a lower closure for the-housing-and such bottom wall is rigidly secured to the base B by an ad'- justable support 22. The semi cylindricaliportion l0 houses a conventionalalr impeller orilani (not shown). An electric motonhousing-Hisdisposed substantially in axial alignment with the longitudinal axis of the semi-cylindrical portion I 0. On the side of the housing H, opposite to the motor. housing 24, is located. a cylindrical airintakesection 26, also substantially in axial alignment with the motor axis 24. Adjustable airintakeports 28'may be disposed, if desired, in the lower portion of housing 26.

A central vertical baffle 30 located in a plane parallel to the front and rear walls l2 and M is disposed within the housing H. The upper portion of the baffle forms a seal with a curved wall 32 (partially shown), which latter joins the forwardwall l2 of the housing, while the lower portion of the baflle 30 forms a seal with the base 29. Thus, the=baflle effectively divides the housing H into two separate air chambers, a rear air chamber 34, and a forward air chamber 36; the former receives air from the impeller section in while the latter. communicates'with a blast or discharge tube 38:

Thesidewall i8 is provided with a rectangular opening 38 which-is substantially equally spaced with respect to the front and rear chambers 34 and 36. A closure member 4i}, preferably box-like inshape is disposed over the opening 39 to form alateral air Passage or intermediate chamber between the front and rear chambers. As shown in thedrawings, this box-like member is of a size sufficient" to offer no substantial resistance to a stream of air flowing therethrough, yet it provides-y a considerableincrease in the length of travel and turbulence of such stream.

A damper D is pivotly hinged about a pin 42, horizontally disposed across the top of the entrance to the auxiliary box-like chamber 46 and such'damper'is adapted to swing upwardly, as shownrin thedrawings, during an operative pe riod, and to. close downwardly against pin 4! during aninoperative period. If desired, limit-- ing means such as a screw 44, may be provided inxthe upperpart of the intermediate chamber to control-the extent of the opening of the damper D, and thereby control the shape or combustion efiloiency'of. the flame. Adjustment of screw 44 maybe-effected while the burner is in operation, thus. permitting. quick and ready flame regulation. A set or look nut 46 or similar means may be used to flxror set the screw 44 in a desired position.

In order to insure proper closing of the damper during an inoperative burner period. as well as to provide contrclof the pressure of the air supplied-to the blasttube during an operative burner period, a threaded extension Al, having a weight nutlflthereon, is disposed on the air-discharge side of the damper D. The threaded extension 41 is disposed in a direction at right angles to the pin- 42;- Adjustment of the nut 48 along the threaded extension permits regulation of the weight o fthe damper and also the regulation of the" force of the air required to lift said damper, i. e., by moving the nut 48 in a direction away from the pin 42, the closing force increases, while burner, the hot combustion Zone in the boiler or 1 furnace has a tendency to create an induced draft through the burner and if this draft is not checked, the combustion zone is chilled and poor flame combustion usually occurs when the burner is restarted. However, this difficulty is overcome by the gravity-operated damper in the housing of the present invention.

During normal operation, air is drawn by the impeller through the intake openings 28 and is forced by the fan impeller downwardly into the rear chamber 34. After striking the bottom of the latter, it flows laterally, lifting and flowing under the damper D, and strikes the rear wall of the intermediate chamber 40, whereupon it reverses its direction of flow and enters the forward chamber 36. In this forward chamber, further turbulence is created in the air stream when the latter strikes side wall I6. Thus the air entering the blast tube 33 has a maximum degree of turbulence, a minimum velocity, and is remarkably free from impeller pulsation effects. In addition, due to the relatively long length of air travel and the large cushioning effect of the three air chambers, a very uniform flow of air is introduced into the blast tube. Thus, the burner housing, in a relatively short overall height and length, has a relatively long air travel path. A comparatively short blast tube maybe used, thus permitting the burner housing to be positioned closer to a furnace or to a boiler than with conventional types of burners. In this way, the

blower housing and blast tube may be enclosed in a modern cabinet.

While certain embodiments of the invention have been illustrated and described, it will be ob-" vious to those skilled in the art that the invention may be otherwise embodied and practiced without departing from the principles or scope thereof.

I claim:

1. In an oil burner blower housing, the combination of an upper impeller section; a substantially rectangular lower section integrally formed with said impeller section; means for dividing the lower section into two separate air chambers;'

and an intermediate chamber laterally disposed on the side of said lower section for providing air communication between said two chambers.

2. An oil burner blower housing, comprising an upper impeller section; a lower section having a blast tube connected thereto; a'pair of.

air chambers within said lower section, one of said chambers being constructed and arranged to receive air from said impeller section, and the:

4 located adjacent to said rear chamber, for discharging air to said blast tube; and an intermediate rectangular chamber laterally ofiset on a side..of. said lowerrsection for receiving air from said rear chamberreversing the direction of flow of such air and introducing it into said forward chamber.

4. In an oil burner blower housing for supplying a stream of air to a blast tube, the improvement comprising an upper semi-cylindrical impeller section; a lower rectangular section integrally formed with said impeller section and containing a first chamber for receiving air from said impeller section, and a second chamber separate from said first chamber for discharging air to said blast tube; and an intermediate chamber laterally disposed on an exterior wall of said lower rectangular section for receiving air from said first chamber and-for introducing air into said second chamber.

5. In an oil burner blower housing, comprising an upper horizontally disposed semi-cylindrical impeller section; a base; downwardly converging front and rear walls extending from the cylindrical surface of saidimpeller section to said base;

- chambers.

6. In an oil burner blower housing comprising an upper impeller section, a plurality of air chambers disposed directly beneath said impeller section, and a gravity-responsive damper in at' least oneofsaid chambers, said damper being arranged and constructed to control the pressure and maximum flow of air during an operative burner period, and automatically to stop the flow of natural inducted draft through said housing during an inoperative. burner period.

7. In an oil burner blower housing, the combination of an upper semi-cylindrical impeller portion having its longitudinal axis disposed horizontally, a lower rectangular portion integrally formed with said impeller section, two separate air chambers in said lower rectangular portion, a blast tube -:connected to' one-of said chambers, an-intermediate chamber disposed on the side of said lower rectangular portion; a weightresponsive damper in said intermediate chamber,

means-for regulating the maximum opening of said damper, and weight-responsive means for closing said damper during an inoperative burner period.

ERNEST CAMERINO.

REFERENCES CITED The following references are file of this patent:

UNITED s'rATEs PATENTS of record in the Number 2,359,567 Levine Oct. 3, 1944

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