US2564087A - Range with ventilating hood - Google Patents

Description

Aug. M, 1951 H. WARREN RANGE WITH VENTILATING HOOD 2 Sheets-Sheet 1 Filed May 22, 1948 o oo INVENTOR. HARRY L. WARREN Aug. M, 1951 H. L. WARREN RANGE WITH VENTILATING HOOD 2 sheets-S t 2 Filed May 1948 HARRY L. WARREN Z;

Patented Aug. 14, 1951 UNITED- STATES PATENT OFFICE 2,564,087 RAN GE .WITH VENTILATINGt HOOD Harry' L. Warren, South Pasadena, Calif.-, as-

signor to Southern California Gas Company; Los Angeles, Calif a corporation of California Application May 22, 1948; SeriaLNo...28\,661

an exhaust fan associated with the ventilating hood:v may be in. operation or out. of operation without appreciably altering the combustion performance of the range'or cooking compartments.

Second, to provide a ventilating hood and conduit system so arranged that a minimum of condensation of cooking vapors, particularly oils and greases, occurs within. the conduit system, there being provided relatively large exposed and easily cleaned areasat the back of the range. and under the ventilatinghood on. which a substantial proportion of. such. vapors tend to condense.

Third, to provide a ventilating range hood which affords-a heated shelf to' warmv dishes and food.

Fourth, to. provide a ventilating range hood which, when the exhaust fan is out of opera tion,. permits discharge of the heat: from the range and open cooking: area into. the kitchen for space heating purposes;

Fifth, to provide a ventilating range hood whichrequires' only a. relatively small capacity exhaust fan so that thereis a minimum interference with winter or summer airconditioning systems and a minimum consumption of electrical energy;

With the above and other objects in view, reference is directed-- to the accompanying drawings in which:

Figure 1 is a front view of a stove equipped with my ventilating hood.

Figure 2 is a side view thereof;

Figure 3 is a top view' thereof with portions of the ventilating hood broken away to facilitate the illustration.

Figure 4' is a back'view thereof also with portions of" the ventilating hood broken away and showing the stove asinstalled and provided with an. exhaust system.

Figure 5 is a fragmentary sectional. view through 5-5' of'Figure 4, the stove being shown:

substantially diagrammatical.

Figure. 6 is a fragmentary sectional view through. 6.6 of Figure 4.

Figure. '7 is a. fragmentary sectional viewthrough. 1l of'Figure 6.

My ventilating, hood; is adapted for installation. onarange I which. comprises a range; top or. opencooking area. 2,.having burners 3, preferably arranged. along the. rear portion. The

range is provided withone or more closed cooking compartmentsltl, such. as a broiler. and oven.v

My ventilating hood structure includes a back. panel 5. which extendsv upwardly from the rear margin. of. the open. cooking area and is provided. with sideflanges o continuing from the.

side wallsof theranger The back. panel. is. provided. with a top. ledge 1.. the back. panel. may curve. forwardly, as. indi cated by 8.

One. or. more ducts 9.. each. intersect the top ledge 1 and extend downwardly to vent-boxes I0, located.-rearwardly of the closed cooking compartments. the. cooking. compartments, vent ducts,.and. with respect to. the ventilating. hood structure, are intake. ducts. Each vent box covers. an. open.-

ing- H- communicating with the; corresponding;

closed cooking compartment. The ventv box. is. open at its under side, as indicated by l2;

Also intersecting the. top ledge 1 is. a. down-- Wardly extending exhaust duct I3 which. com.- municates with the intake side of anexhaust. fan.

l4.. The exhaust fan and a suitable drivingmo tor, not shown,.may be mountedin a specialcompartment below one of the. closed. cooking compartments. The exhaust. fan is provided with a discharge duct l5 which. passes downwardly through the floor. on whichtherange sits and into a suitablelateral pipe.

The back. panel ii supports a hood or hollowv shelf structure [6,.the upper side of'which forms a shelf surface. Thehood structure includes side walls I1 continuing from the side flanges E of the back panelanda back wall 18 connecting the rear extremities of the side walls 11. The forward margin of'the hood structure curves downwardly to. form a flange or lip !9. structure is a main bafile 20 in the form of a plate, the rear portion of which is bent downwardly, forming a vertical wall 2!, and then extends horizontallyto reston the topledge 1. The- Adjacent. the ledge.

The. ducts 9.- are, with respect. to.

Within the hood which rests on the ledge I is provided with an opening communicating with the exhaust duct.

Disposed under the main bafile 20 is a second baffle 23 in the form of a plate, the rear portion of which rests on the top flange I forwardly of the ducts 9 and I3, the forward portion of which is bent upwardly then forwardly to form an angular lip 24. The vertical wall 2| of the main bafile is provided with offset portions 25 which overlie the entrance to the vent ducts 9 and communicate with the space between the baffles 28 and 23.

The lip 24 of the secondary bafile 23 forms, with the under side of the bafile 28, an outlet opening or slot 26 which communicates through a distributor chamber 21 defined by the bafiles and through the offset portions 25 to the vent ducts 9. The forward edge of the main baflie 28 forms with the forward margin of the hood structure an inlet opening or slot 28 which communicates through a distributor chamber 29 with th exhaust duct I3.

Operation of the ventilating hood is as follows:

When the closed cooking compartments are in operation, and the exhaust fan is functioning, gases and vapors issuing from the outlet ll of a closed cooking compartment flow upwardly through duct 9, forwardly through chamber 21 and issue from the outlet 26. A negative pressure exists at the inlet 28; consequently the gases and vapors tend to remain within the boundaries of the hood structure [6 and flow into the inlet 28 and pass through the distributor chamber 29 to the exhaust duct l 3.

Irrespective of operation of the closed cooking compartments, vapors and gases from the open burners 3 pass upwardly to the exposed portions of the bafiies 23 and 20 and are drawn into the inlet 28. If the exhaust fan is not functioning, the vapors from the open cooking compartments or from the closed cooking compartments, upon engaging the hood structure, flow outwardly around the margins thereof.

It should be noted that there is no direct connection between the exhaust duct and the closed cooking compartments so that under no condition can an excessive suction pressure be applied to the closed cooking compartment. Tests have established the fact that the combustion'performance of the closed cooking compartments is not appreciably affected by the operation of the exhaust fan; that is, the combustion performanc is constant whether the exhaust fan is in operation or not, and furthermore the capacity of the eX- haust fan may vary over a wide range without appreciably affecting .the combustion performance of the closed cooking compartments.

It will be observed that by reason of the open ing l2 under each vent box l0, gases from the closed cooking compartment are free to fiow downwardly and out should a back pressure exist in the ducts 9 so that the oven or broiler may be operated irrespective of the conditions of the ventilating hood or associated exhaust system.

The exposed surfaces of the back panel and exposed under sides of the bafile 20 and hood [6 are smooth and easily cleaned. These surfaces serve to collect for ready removal some of the solids which might otherwise collect in the duct I3.

Many other embodiments of the invention may be resorted to without departing from the spirit of the invention.

I claim:

1. The combination with a kitchen range having top burners and at least one closed cooking compartment, of a ventilating range hood, comprising: an upright structure adapted for installation at the rear of the kitchen range and having an intake duct communicating with said closed cooking compartment and an exhaust duct communicating with an exhaust system; a hollow shelf structure mounted on said upright structure and extending forwardly thereof over the top burners of said range, the under side of the forwardly extending portion of said shelf structure being open; a bafile within said hollow shelf structure, said bafile defining with the upper extremity of said upright structure a passageway communicating with said intake duct, and defining with said hollow shelf a passageway communicating with said exhaust duct, said baffle terminating short of the forward extremity of said shelf to permit flow of gases forwardly under said bafile from said intake duct then rearwardly through said passageway to said exhaust duct.

2. The combination with a range having an open cooking area and an enclosed cooking compartment of a ventilating hood comprising: an upright panel adapted for attachment to the range at the rear of its open cooking area, ducts rearwardly of said panel adapted for communication respectively with said closed cooking compartment and a region of reduced pressure; a hollow shelf structure mounted on said upright panel and defining at its under side a rearward outlet opening communicating with the duct,

communicating with said closed cooking compartment and a forward inlet opening communicating with the duct leading to the region of reduced pressure, whereby vapors issuing from said outlet opening tend to flow forwardly along the underside of said shelf to said inlet opening, and vapors arising from said opening cooking area are likewise drawn into said inlet opening.

3. The combination with a range having an open cooking area and an enclosed cooking compartment of a ventilating structure comprising: an upright back panel structure including a first duct connected to a source of negative pressure, a second duct connected to said enclosed cooking compartment, said ducts terminating at the upper end of said back panel structure; a hood adapted to be positioned with its rearward margin overlying said panel, said hood having depending side walls; a main bafile under said hood within the side walls, said main bafile defining with the forward wall of said hood an inlet opening, and with the top of said hood a passageway communicating with said first duct; a second bafile defining with said main bafile an outlet rearwardly of said inlet opening and a passageway communicating with said second duct; the underside of said main bafile being exposed to the open cooking area between said outlet and inlet opening and tending to direct vapors issuing from said outlet and vapors arising from said open cooking area to said inlet opening.

4. The combination with a range having an open cooking area and an enclosed cooking compartment of a ventilatingstructure comprising: a hood having depending marginal walls; a main bafile disposed under said hood within said walls to define with said hood an intake opening adjacent the forward wall of said hood, and a distributor chamber rearwardly thereof; a secondary baffie forming with said main bafile an outlet opening rearwardly of said intake opening and a second distributor chamber rearwardly thereof; an exhaust duct connecting said intake opening and first distributor chamber with a source of nega- 5 tive pressure; an intake duct connecting said outlet opening and second distributor chamber with said enclosed cooking compartment; said main bafile being exposed between said outlet opening and intake opening and tending to direct vapors issuing from said outlet opening and vapors arising from said open cooking area to said intake opening.

HARRY L. WARREN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Amos July 26, 1898 Number Number 15 Number

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