US1437866A - Ventilating unit - Google Patents

Description

W. SHURTLEFF. VENTILATING UNIT.

I I I I I APPLICATION FILED JUNE 25, 1920.

Patented Dec. 5, 1922.

Ii" I Patented Dec. 5, 1922.

nire srarps WILFREI) SI-IURTLEFF, OF IVIOLINE, ILLINOIS, ASSIGNOR TO MOLINE HEAT, OF MOLIN E,

PAIENT @FFICEL ILLINOIS, A CORPORATION 0F ILLINOIS.

VENTILATING UNIT.

Original application filed March 10, 1919, Serial No. 281,800. Divided and this application filed June 25, 1920. Serial No. 391,751.

State of Illinois, have invented certain new and useful Improvements in Ventilating Units, of which the following is a specifica-- tion.

My invention rela-tes to Ventilating units of that class in which air is drawn in from the outside and circulated in contact with heating elements before delivery to the room to be served.

@ne of the important objects of my invention is to dispense with air cleaning mechanism involving the use of water, and to provide improved means for dry cleaning the air before it is delivered. rIhe subject matter of the present invention is a division of a prior application, filed by me on March 10th, 1919,` and bearing Serial No. 281,800.

rlhe above and other features of my invention are clearly disclosed on the aecompanying drawing, in which- Ifig. 1 is a vertical sectional view of my improved unit, and

Fig. 2 is a perspective view showing one of the louvres for separating dust from the air.

'Ihe unit shown comprises the housing 5l youtlet 10 extends downwardly through the oor 6 to communicate with the heating chamber 11. The front wall 12 of the heating chamber is set a distance forwardly of the front wall 13 of the chamber 7 so as to leave the outlet 14.

Within the heating chamber 11 are supported two radiator structures 15 and 16 which are separated by a partition 17 rIhis partition is of about the same height as the radiator structures, and on a pivot rod 18 extending along the top of the partition is secured the damper 19 for controlling the outlet 14. rIhis damper may swing from its upper position against the floor 7 to a lower position against the bracket 20 secured to the Wall 12. The counter-weight 21 is adjustable on the arm 22 extending from the damper and tends to swing the damper upwardly. Secured to the front wall 12 is some suitable thermostatic device 23 whose operating lever 24 connects with the cord 25 which extends around the idler pulley 26 and is adapted for connection with the damper by means of the hook 27 and the eye 28.

The operation thus far is apparent, the blower draws in the air from the outside through the duct 8 and forces it downwardly into the heating chamber 11. If the temperature in the room to be served is below normal the thermostat and counter-weight have co-operated to keep the damper 19 up so as to prevent direct connection of the outlet 14 with the blower outlet. the blower is therefore forced downwardly past and into contact with the radiator structure 15, and then upwardly in contact with the radiator structure 16 and into the outlet 14 into the room, the air being thus heated. If the temperature of the room is very high when the device is started the damper 19 will be held in its lower position so that all the air from .the blower will be forced directly through the outlet 14 into the room until the room is sufficiently cooled.

After starting of the device and during its normal operation the thermostat and counter-weight co-operate to so adjust the damper in the outlet 14 that the proper amount of direct cold air and warmed air will be discharged into the room.

It is desirable to clean the air before it is delivered from the device into the room. In prior structures cleaning mechanism involving water pans have been used and very eiiicient cleaning is accomplished so long as the water pans are kept properly supplied with water. However, in practice, the caretaker will not always keep the reservoirs or pans lilled with water and these washing systems are then of course, useless. I have therefore provided an improved mechanism for efliciently dry cleaning the air. rl`he mechanism involves the use of louvres for baffles between the radiator structures and floor of the device against which the dust laden air impinges` and the dust and dirt particles are separated therefrom.

Referring to the drawing, a row of louvre sections 2,9 form a baille wall between the space 30 directly below the radiators and The cold air from the dead space 31 above the floor 32. These louvre sections are overlapped slightly to leave the passageways 33, and each section has also stamped therefrom the baflie flanges 34 for leaving passageways 35. The louvre sections and the baffle flanges extend at such angles that they will readily catch dust and dirt particles and deflect them downwardly through the passageways 33 and 35 into the space 31. After the air passes downwardly through the radiator structure 15 to be warmed it strikes the louvres and the dust and dirt is separated therefrom in themanner referred to. Preferably the wall formed by the louvres is rounded as shown so that the air is gradually guided from the radiator 15 to the radiator 16 and the friction thereby reduced and the efficiency of the machine increased.

The radiator structure 15 receives the full' impact of the air forced downwardly by the blower 9' and particularly when the air is cold there will be a tendency for the radiator 15 to be so chilled at its upper end that any steam attempting to enter is immediately condensed and the ends of the radiator sections will be filled with cold air which blocks circulation. This, of course, subtracts just that much heating area from the radiator structure.

Another feature of my invention is therefore to provide an arrangement for insuring rapid and uniform circulation through the radiator sections. Preferably the radiator sections 15 and 16 are individual comlete structures. As shown, steam enters rom 'supply pipe 36 into the radiator 15 at' the bottom and one end thereof, this pipe 37 connecting the other ends of the radiators at the bottoms thereof while the pipe 38 receives the outflowing steam. The radiator 15 which is in the direct path of the cold air from the blower, therefore receives the hot steam,. and the steam can readily circulate through the radiator sections and completely ll it, thus eliminating any chances for the formation of cold air pockets. The steam then flows through the' pipe 37 and Acirculates through the radiator 16 and then iframes out through the pipe 38. A valve 39 is provided for controlling the in fiow of steam and on the radiator 16 an air vent 40 is preferably provided.

The above arrangement f radiators has proven very efficient, cold air pockets and checking of the circulation being eliminated, the radiator being uniformly heated by the steam so that the maximum heating area is provided for heating the air.

This eficient heating arrangement together with the automatic control of the outlet damper and the simplified air cleaning arrangementv make the device very eiiicient in its operation.

I do not desire to be limited to the exact construction and arrangement shown and described, as changes can no doubt be made which will still come within the scope of my invention.

I claim as my invention:

1. In a Ventilating unit, the combination of a housing having air inlet and outlet openings, a heating element within the housing, means for directing the air downe wardly and upwardly through said heating element, anda dust separator comprising a plurality of louvres extending across the housing beneath the heating element and arranged in a curved line conforming to the path of the air.

2. In a Ventilating unit, the combination of a housing having inlet and outlet openings in the upper portion thereof, a heating element through which the air passes downwardly and upwardly from said inlet to said outlet openings, and a dust separator between said heating element and the bottom of the housing, comprising a plurality of louvres spaced apart in offset relation, and arranged in a curved line conforming to the path of the air, each louvre being slotted longitudinally and provided with flanges adjacent to the slot, and projecting substantially at right angles to the path of the air.

In witness whereof, I hereunto subscribe my name this 29th day of May, A. D. 1920.

WILFRED SHURTLEFF.

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