US2677253A

US2677253A - Air cooling oxygen circulating device

Info

Publication number: US2677253A
Application number: US250924A
Authority: US
Inventors: Lee Randolph
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-10-11
Filing date: 1951-10-11
Publication date: 1954-05-04
Anticipated expiration: 1971-05-04

Description

y 4, 1954 R. LEE 2,677,253

AIR COOLING OXYGEN CIRCULATING DEVICE Filed Oct. 11, 1951 FIG. I.

IN VENT OR RANDOLPH LEE WW6? W ATTY Patented May 4, 1954 UNITED STATES PATENT OFFICE COOLING OXYGEN CIRCULATKNG DEVICE 2 Claims.

This invention relates to an oxygen circulating device of a type that is generally used in regencrating the air supplied to a patient enveloped within an oxygen tent or hood. More specifically the invention relates to an improved oxygen circulating system of the mechanical refrigerated type having an improved air filtering construction embodied therein.

The primary object is to provide an improved construction in a mechanical air conditioned oxygen regenerating device.

Another object is to provide an oxygen circulating device having a mechanical cooling system including a removable filtering element so disposed with respect to the cooling coils of the device that any air which passes over the cooling coils is filtered prior to its contact with said coils.

A still further object is to provide an improved oxygen circulating device having a mechanical air conditioning unit, the unit including a plurality of cooling coils, the device including a blower for exhausting the air from an oxygen hood or tent and a filtering element so disposed in the device that the air passing over the coils is filtered prior to its contact with said coils.

Still another object is to provide an improved oxygen circulating device having a mechanical air conditioning unit in combination with a filtering element so disposed within the unit that the cooling coils of the unit remain free of lint and other matter that may be picked up in the air stream emanating irom the hood.

These and further objects will become more readily apparent from a reading of the specification taken in connection with the accompanying sheet of drawing In the drawing:

Figure 1 is a cross sectional view in elevation of an oxygen circulating device as shown in use with an oxygen hood and supply;

Figure 2 is a sectional view taken substantially along the line 22 of Figure 1; and

Figure 3 is a perspective view of a filtering element.

Referring now to the drawing an oxygen circulating unit is generally indicated by the reference character iii. The unit It comprises a container i I supported on caster wheels l2. A box or enclosure Ill is suspended within the container II,

this box having an opening i l at its upper end.

A box extension i5 is seated on the container l l and projects upwardly with respect thereto.

The extension 55 is provided with a bafile l6 which divides the extension l5 into an inlet passage l! and an outlet passage IS. The inlet passage ii and outlet passage is are respectively provided with openings it and 28 in communication with the interior of a hood or tent 24 which is suitably suspended from a support 22 supported on the extension it. The hood 2| is adapted to enclose a patient lying on a bed 23 in a conventional manner.

The bafile it is provided with a portion it projecting into the box IE to separate said box into an inlet chamber 24 in communication with the inlet passage ii, and an outlet chamber 25 in communication with the inlet chamber 24 and the outlet passage i8. A plurality of refrigerant cooling coils 26 are disposed in the

chambers

24 and 25 immediately below the opening it of the box l3.

A horizontally extending section 21 is connected to the baffle is, this section 2? defining the upper limits of the opening it. The section 2'! has a transversely extending angle Z8connected thereto. An angle 28 is connect-ed across a top section 30 of the container i i. The

angles

28 and 29 provide a backing for a filtering element ti which is removably positioned in the inlet passage I! over the opening l9. A reticulated mem-- ber such as a screen or perforated plate 32 has its upper end connected to the extension l5 as indicated at 33 and to the section 38 as indicated at 34. 1

A blower 35 is positioned in the inlet chamber 24 immediately below the cooling coils 26. The blower 35 is connected for rotation with a shaft 36 journalled in bearings 37 mounted on the box i3. An electric motor 38 drives the shaft 37, the motor 38 being mounted in the container I l Refrigerant is supplied to the cooling coils 26 by means of a compressor 33 connected to a condenser it from which the liquid gas flows to a receiver tank 4!. A conduit line 42 supplies the gas to an expansion valve not shown which delivers the refrigerant to the cooling coils 26 in a conventional manner. A return line 43 leads from the coils 25 to the compressor. The refrigerant system is only schematically shown and may be of conventional design including the necessary thermostats and control elements which need not be shown in the present invention.

Oxygen is supplied to the outlet passage by means of a conduit 35, opening into the passage as indicated at 46. The conduit i5 is connected to a conventional oxygen valve arrangement 41 mounted on an oxygen tank 48.

In conventional oxygen systems the cooling coils soon lose their efficiency since they become covered with lint and other materials which are drawn from the hood. The interior of the passages and the chambers likewise become covered. with this material requiring frequent cleaning and maintenance, thus necessitating the shut down of the machine. In order to avoid this problem, the present improvement contains a removable filter element that is placed in the intake passage [1, close to the cooling coils 26, so that all undesirable lint and other materials are filtered out before entering into the passages and the filtering chamber. The filter 3| in combination with the reticulated member 32 serve to clean the air as it returns to the circulating system, thus keeping the interior chambers and particularly the mechanical cooling coils in maximum efiiciency operation. The element 3! can easily be replaced by removing the reticulated member 32.

Thus it can be seen that a new combination has been disclosed, the combination including an oxygen circulating system comprising a blower, mechanical refrigeration coils, and a filter disposed in such a position as to keep the cooling coils operating at maximum eflicienoy. It must be understood that changes may be made which do not depart from the spirit of the invention as disclosed nor from the scope thereof as defined in the appended claims.

What is claimed is:

1. An air cooling and circulating device adapted to be connected to a source of oxygen comprising, a container, a box positioned within said container, said box having an opening at its upper end, an extension projecting upwardly from the container, said extension being in communication with the opening of said box, a baffle positioned within the extension to divide the same into an inlet passage and an outlet passage, said bafiie extending through the opening of said box into the box to divide said box into an inlet chamber and an outlet chamber, said chambers being in communication, said passages being open and being adapted to communicate with an enclosure, a plurality of cooling coils disposed in the inlet and outlet chambers immediately below the opening of said box, a blower in said inlet chamber disposed immediately below said coils in the inlet chamber, said blower being arranged to circulate air entering into said inlet passage over said cooling coils and through said outlet passage, a filter element disposed in said inlet passage substantially adjacent said cooling coils in the inlet chamber, mechanical refrigeration means connected to said cooling coils, and a reticulated member disposed over said opening of the outlet passage and over the filter element disposed in the inlet passage.

2. An air cooling and circulating device adapted to be connected to a source of oxygen comprising, a container, a box positioned within said container, said box having an opening at its upper end, an extension projecting upwardly from the container, said extension being in communication with the opening of said box, a baffle positioned within the extension to divide the same into an inlet passage and an outlet passage, said baffle extending through the opening of said box into the box to divide said box into an inlet chamber and an outlet chamber, said chambers being in communication, said passages being open and being adapted to communicate with an enclosure, a first plurality of cooling coils disposed in the inlet chamber on one side of said baffle, a second plurality of cooling coils disposed on the other side of said bafile in said outlet chamber immediately below the opening of said box, a blower in said box disposed immediately below said coils, said blower being arranged to circulate air entering into said inlet passage over said. cooling coils and through said outlet passage, a removable filter element disposed in said inlet passage substantially adjacent said cooling coils in the inlet chamber, mechanical refrigeration means in said container for supplying refrigerant to said cooling coils, and a removable reticulated member disposed over said filter element disposed in the inlet passage.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,104,589 Hartman Jan. 4, 1938 2,159,741 Kettering May 23, 1939 2,162,860 Philipp June 20, 1939 2,166,813 Gibson July 18, 1939 2,190,613 Sittler Feb. 13, 1940 2,210,458 Keilholtz Aug. 6, 1940 2,212,239 Komrofi Aug. 20, 1940 2,310,843 Ditzler Feb. 9, 1943 2,502,263 Lewis Mar. 28, 1950 2,581,709 Rogers Jan. 8, 1952