US1394946A - Ventilating unit - Google Patents

Description

W. SHURTLEFF. VENTIILATING uwn. APPLICATION FILED IIIAR. IQ, I919.

1,394,946, vPatented Oct. 25, 1921.

9 UNITED STATES PATENT OFFICE.

WILFBED snowman, or nouns, ILLINOIS, ASSIGNOR T0 norms near, or

- MOLINE, ILLINOIS, a CORPORATION or ILLINOIS.

vnNrILaTme UNIT.

.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.

One of the important objects ofmy 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.

Another important object of this invention is to provide an improvedarrangement of radiators for preventing localized cooling by the incoming air and insuring rapid and uniform circulation of steam thereair.

The unit shown comprises the housing 5 which has the transverse wall 6 near its upper end forming the floor of the blower chamber 7 from which the duct 8 extends rearwardly for connection with some opening leading to the outside of the room to be served, as for example, a window opening. Within the chamber 7 is the blower 9 whose outlet 10 extends downwardly through the floor 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. This 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. This damper may swing from Specification of Letters Patent.

damper upwardly. Secured to Patented Oct. 25, 1921.

Application filed March 10, 1919. Serial No. 281,800,

its upper position against the floor 7 to a lower pos1t1on against the bracket 20 secured to the wall 12. The counter-weight 21 1s ad ustable on the arm 22 extending from-the damper and tends to swing the the front wall 12 1s some suitable thermostatic device 23' whose operating lever 24 connects with the cord 25 which extends around the ldler pulley 26 and is adapted for connect1on with the damper by means of the hook 27 and the eye 28.

The operation thus far is apparent, the

blower draws in air from the outside through the duct 8 and forces it downwardly into the heating chamber 11. If the temperature 1n the room to be served is below normal the thermostat and counter-weight have cooperated to keep the damper 19 up so as to prevent direct connection of the outlet 14 with the blower outlet. The cold air from 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 hlgh when the device is started the damper 19 Wlll 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 cooperate 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 eificient 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 filled with water and these washing systems are then, of course, useless. I have therefore provided an improved mechanism for efiiciently dry cleaning the air. The mechanism involves the use of louvers or battles 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 louver sections 29 form a bafile wall between the space 30 directly below the radiators and the dead space 31 above the floor 32. These louver sections are overlapped slightly to leave thepassageways 33, and each section has also stamped therefrom the bafile flanges 34 for leaving passageways 35. The louver sections and the bafile flan es extend at such angles that they willread1ly catch dust and dirt particles and deflect them downwardly through the passa eways 33 and 35 into the space 31. After the air passes downwardly through the radiator structure 15 to be warmed it strikes the louvers and the dust and dirt is separated therefrom in the manner referred to. Preferably. the wall formed by the louvers 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 mcreased.

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 radlator 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 endthereof, the pipe 37 connecting the other ends of the radiators at the bottoms thereof while the pipe 38 receives the outfiowin steam. The radiator 15which 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 fill it, thus eliminating any chances for the formation of cold air pockets. The steam then flows through the pipe 37 and the steam so that the maximum eating area is provided for heating the air.

TlllS efiicient heating arrangement together with the automatic control of the outlet damper and the simplified air cleaning arrangement make the device very efiicient 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.

Having described my invention, I claim as follows:

1. In a ventilating unit of the class described, the combination of a housin having an air inlet and an outlet, a blower within said housing between said inlet and outlet, an up-passageway and a down-passa eway 1n said housing, an independent radlator structure in each passageway, said downpassageway communicating in its lower end with said up-passageway, and a damper for controlling the connection of said up-passageway with said outlet.

2..In a ventilating unit of the class described the combination of a housing having an air inlet and an outlet, a partition dividing the housing below said outlet into rear and front passageways connected at their lower ends, a radiator structure in each passageway, said radiator structures being connected serially for the flow of steam therethrough, a damper hinged at the upper end of said partition and adapted to swing in said outlet to control the connection of said outlet with said front passageway and with said air inlet.

In witness whereof, I hereunto subscribe my name this 5th day of March, A. D., 1919.

WILFRED SHURTLEFF.

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