US2400215A - Refrigeration - Google Patents

Description

May 14, 1946. V

D. a. SMEILLIE REFRIGERATION Filed Dec. 8, 1945 1 I I 1 I I I 1/ 1 7/1 I n, 1 I z I INVENTOR. ,Donald 6. Smellie Patented May 14, 1946 REFRIGERATION Donald G. Smellie, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a corp'oration of Ohio Application December 8, 1943, Serial No. 513,345

11 Claims.

This invention relates to refrigeration and more particularly to a combined cooling air and products of combustion flue for a gas fired refrigerator especially designed for use, but in its broadest aspect not so limited, with a dual intermittent absorption refrigerating apparatus.

According to the present invention the back wall of the cooling air flue of a domestic refrigerator cabinet also forms the retaining means and extension for the products of combustion flue having a lining in the form of pre-fabricated insulating members.

For the purposes of illustration, the invention has been disclosed in combination with two intermittent absorption refrigerating units operating alternately on the absorption-evaporation and generation-condensation phases. The intermittent absorption refrigerating unit per seforms no part of the present invention except in combination with the novel combined cooling air products of combustion flue of this invention. The construction and operation of the two intermittent absorption refrigerating units per so are described and illustrated in an application for United States Letters Patent by Curtis C. Coons, Serial No. 450,980 filed July 15, 1M2.

The generator-absorbers of the intermittent unit are arranged at each side of the rear of the cabinet so as to allow free passage for the cooling air over the heat rejecting parts of the apparatus which are arranged transversely across the back of the cabinet for vertical flow of cooling air thereover. The plate for the cooling air flue is in the form of a sheetmetal stamping with a central shaped portion of channel formation to form. the rear wall of the cooling air flue proper with U-shaped retaining and extension portions at either side thereof to retain the lining of the products of combustion flues in position against the rear of the cabinet and which form an extension of the products of combustion fines of the generator-absorbers to conduct the products of combustion to the top of the cabinet where they will difiuse into the room air and also serve to. increase the flow of cooling air over the heat rejecting parts of theappapieces conduits for conducting the products of combustion from each generator-absorber to the top of the, cabinet. The U-shaped extensions of the sheet metal stamping embrace the elongated cross-sectionally U-shaped insulating members when the stamping is secured to the rear of the cabinet so as to hold the lining for the products of combustion flue extension in a position to con- Figure 1 is a cross-sectional view of two intermittent absorption refrigerating units assembled with a domestic refrigerator cabinet combined with the combined cooling air and products of combustion flue of this invention.

Figure 2 is a transverse-sectional view taken on line, 2--2 of Figure 1, and

Figure 3 is an isometric view of the sheet metal stamping which form both the cooling air flue and the extension of the products of combustion flue.

Referring to Figures 1 and 2, the refrigerating apparatus includes two generator-absorbers A, A mounted on the rear wall l2 of. the cabinet in near the corners thereofand adjacent to the bottom of the cabinet. The generator-absorbers A, A are heated by gas burners, one of which is shown at I 4. The generator-absorbers A, A have products of combustion fiues l6, l6 extending longitudinally therethrough so that the products of combustion produced when the burners are ignited will drive off refrigerant vapor from the'absorbent contained in the generator,- absorbers A, A.

The refrigerating units also include air cooled primary condensers C, C extending across the rear wall of the cabinet In near the upper end thereof. Immediately below the primary condensers C, C and also extending across the back wall 12 of the cabinet l0 are secondary condensers l8, l8 which form a part of an indirect cooling circuit for the generator-absorbers A, A, the construction and operation of which is described and illustrated in the application for United States Letters Patent by Curtis C. Coons, Serial No. 450,980 filed July 15, 1942.

The combined cooling air and products of combustion flue 20 is generally indicated by the reference character 20, and is mounted on the back wall II of the, cabinet Ill. The flue 20 is formed of a, metal stamping and has a channel shaped portion 22 with its open side facing the cabinet wall l2 and overlying both the primary condensers C, C and the secondary condensers l8, l8.

Integral with the legs of the channel shaped portion 20 are cross-sectionally U-shaped extensions 24 and 26, also having their open sides facing the wall l2 of the cabinet l0. Integral lateral lugs 28 and 30 are provided on the extensions 24 and 28 for securing the flue 20 to the rear wall l2 of the cabinet i0.

Each cross-sectionally U-shaped extension 2 and 26 in cooperation with the rear wall E2 of the cabinet forms extensions for the products of combustion fiues l6, iii of the generator-absorbers A, A.

It has been found desirable to insulate the products of combustion flues of gas fired refrigerating apparatus and for this purpose the prefabricated elongated cross-sectionally U-shaped members 32 and 34 and the flat elongated insulating members 36 and 38 have been provided. The members 32 and 34 are shaped to fit the interior of the cross-sectionally U-shapedextensions 24 and 26 and have their open sides positioned against the flat members 38 and 38 which in turn lie against the rear wall not the cabinet It, An opening 40 is formed at the bottom of the framework 42 for the entrance of cooling air and a screen 44 is provided at the top for its exit.

To assemble the combined cooling air and products of combustion due 20 to the cabinet it is merely necessary to position the members 32, 34, 36 and 38 in the extensions 24 and 26 and secure the flue 20 to the wall 12 by any suitable means such as by screws so that the conduits formed between the members 32, 34, 36 and 38 form extensions of the products of combustion flues l6, IS.

The long passage formed by the channel portion 22 of the flue 20 having both the primary and secondary condensers positioned therein induces a rapid circulation of air over the heat rejecting portions of the refrigerating apparatus while the exit of hot flue gases from the screen 44 induces an additional flow of cooling air over the heat rejecting portions of the apparatus.

From the foregoing it canbe seen that this invention provides a combined cooling air and products of combustion flue which is easily manufactured, easily assembled with the cabinet and which forms extensions for the products of combustion flues for a gas fired refrigerator in addition to forming a cooling air passageway for directing cooling air over the heat rejecting parts of the refrigerator. n

While I have shown but a single embodiment products of combustion passage to the top of said cabinet; said flue being in the form of a stamping having an inwardly facing recess embracing a lining of insulating material which forms the conduit for products of combustion so as to hold it in position.

2. A products of combustion flue for an absorption refrigerating apparatus in combination with a refrigerator cabinet comprising, an elongated flat piece of insulating material lying against a wall of said refrigerator cabinet, an elongated of my invention it is to be understood that this embodiment is to be taken as illustrative only and not in a limiting sense. I do not wish to be limited to the particular structure shown as described but to include all equivalent variations thereof except as limited by the scope of the claims.

I claim: I

1. In combination, a refrigerator cabinet, an air cooled absorption refrigerating apparatus as: sociated therewith, said apparatus having a vessel with a passage for products of combustion. and a combined cooling air and products of combustion flue attached to said cabinet, said flue being so constructed and arranged as to form an air passageway for the flow of cooling air over the heat rejecting parts of said apparatus and a conduit for products of combustion from said cross-sectionally U-shaped piece of insulating material having its open side lying against said fiat piece of insulating material and means for securing both of said pieces of insulating material against said cabinet wall.

3. A combined cooling air and products of combustion flue for a gas fired refrigerator in combination with a refrigerator cabinet comprising, a channel shaped member attached to a wall of said refrigerator cabinet with the open side of the channel facing the cabinet wall, a U-shaped extension integrally connected to one leg of said channel shaped member with the open side of the U facing the cabinet wall, an elongated crosssectionally U-shaped piece of insulating material lying in said U-shaped extension with the open side of the U facing the cabinet wall and a flat elongated piece of insulating material lying between the open side of said U-shaDed piece of insulating material and said'cabinet wall.

4. A combined cooling air and products of combustion flue for a gas fired refrigerator in combination with a refrigerator cabinet comprising, a channel shaped membe attached to a wall of said refrigerator cabinet with the open side of the channel facing the cabinet wall, a pair of U- shaped extensions integrally connected to the legs of said channel shaped member with the open side thereof facing the cabinet wall, an elongated cross-sectionally U-shaped' piece of insulating material lying in each of said U-shaped extensions with the open side of the U facing the cabinet wall and a flat elongated piece of insulating material lying between the open side of each of said U-shaped pieces of insulating materal and said cabinet wall.

5. In combination, a domestic refrigerator cabinet, two intermittent absorption refrigerating units each having a generator-absorber with a products of combustion flue extending longitudinally therethrough, an air cooled primary condenser and an indirect cooling circuit for each generator-absorber having an air cooled secondary condenser, said units being mounted on an outer wall of said cabinet with the generatorabsorbers positionednear the corners of said cabinet adjacent the bottom thereof with the products of combustion flues extending in a vertical direction and with the primary and secondary condensers arranged across the wall of the cabinet above the generator-absorbers and a sheet metal backing plate for said cabinet having three channels facing the cabinet well. one centrally located and overlying said primary and secondary condensers to direct cooling air thereover, and two laterally located. extending upwardly from said generator-absorbers and forming extensions of said product of combustion lines.

.6. In combination, a domestic refrigerator cabinet,- two intermittent absorption refrigerating units.v each having a generator-absorber with 8. products of combustion flue extending longitudinally therethrough. an air cooled primary condenser and an indirect cooling circuit for each generator-absorber having an air cooled secondary condenser, said units being mounted on an outer wall of said cabinet with the generatorabsorbers positioned near the corners of said cabinet adjacent the bottom thereof with the products of combustion flues extending in a vertical direction and with the primary. and secondary condensers arranged across the wall of the cabinet above said generator-absorbers; a sheet metal backing plate for said cabinet having three channels facing the cabinet wall, one centrally located and overlying said primary and secondary condensers to direct cooling air thereover, and two laterally located extending upwardly from said generator-absorbers and forming extensions of said products of combustion dues. and an insulating lining for K said laterally located channels.

'2'. In combination, a domestic refrigerator cabinet, two intermittent absorption refrigerating units each having a generator-absorber with a products of combustion flue extending longitudinally therethrough, an air cooled primary condenser and an indirect cooling circuit for each generator-absorber having an air cooled secondary condenser, said units being mounted on an outer wall of said cabinet with the generator-absorbers positioned near the corners of said cabinet adjacent the bottom thereof with the products of combustion flues extending in a vertical direction and with 'said primary and secondary condensers positioned across the wall of said cabinet above said generator-absorbers, a sheet metal backing plate for said cabinet having three channels facing the cabinet wall, one centrally located and overlying said primary and secondary condensers to direct cooling air thereover, and two laterally located extending upwardly from said generator-absorbers and forming extensions of said products-o! combustion fines, and an insulating lining for said laterally located channels, said linings each comprising an elongated cross-sectionally U-shaped member of insulating material with its open side lying against a flat elongated piece of insulating materialfiying against the wall of said cabinet.

8. In combination, a domestic refrigerator cabinet, an absorption refrigerating apparatus having a vessel with a products of combustion flue extending longitudinally therethrough, an air cooled heat rejecting vessel, said apparatus bein secured to a wall of said cabinet with said products of combustion flue extending vertically near the lower end of said wall and the heat rejecting vessel positioned crosswise of said wall near the upper end thereof and a backing plate for said wall comprising a channel shaped member overlying said heat rejecting vessel to direct cooling air thereover and an integral extension on said channel shaped member forming an extension for said products of combustion flue.

9. In combination, a domestic refrigerator cabinet, an absorption refrigerating apparatus hav-' ing a vesselwith a products of combustion flue extending longitudinally therethrough, an. air

cooled heat rejecting vessel, said apparatus being.

secured to a wall of said cabinet with said products of combustion flues extending vertically near the lower end of said wall and the heat rejecting vessel positioned crosswise of said wall near the upper end thereof,'a backing plate for said wall comprising a channel shaped member overlying said heat rejecting vessel to direct cooling air thereover and an integral extension on said chan v I nel shaped member forming an extension for said products of combustion ilue and an insulating lining for said extension comprising an elongated eross-sectionally U-shaped member of insulating material having its open side lying against a flat elongated piece of insulating material lying against said cabinet wall.

iii. In combination, a domestic refrigerator cab inet, two gas firedintermittent absorption refrigcrating units associated with said cabinet with the generator-absorbers of said units mounted in a vertical position at the rear corners oi the back wall of said cabinet near the bottom thereof and with the heat rejecting portions of said units posh tioned across the back wall of said cabinet near the upper end thereof, and acombined cooling air and products oi. combustion flue secured to the back' wall of said cabinet above said generator-absorbers, said flue including a channel shaped portion overlying the heat rejecting portions of said units to form a passage for directing cooling air thereover and two lateral channels extending from the top of said generator-absorbers to the top or said cabinet to form products of combustion passages.

11. In combination, a domestic refrigerator cabinet, two gas fired intermittent absorption refrigwall oi? said cabinet near the bottom thereof and with the heat rejecting portions of said units po-,-

sitioned across the back wall-oi said cabinet near the upper end thereof, a combined cooling air and products of combustion flue secured to the back wall of said cabinet above said generator-absorbers, said flue including a channel shaped portion overlying the heat rejecting portions of said units to form a passage for directing cooling air thereover and two lateral channels extending from the top or said generator-absorbers to the top of said cabinet to term products of combustion passages and an insulating lining for each of said lateral channels.

' DONALD G. SMELL-IE.

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