US1937705A - Refrigeration - Google Patents

Description

Dec. 5, 1933.

5. E. LINK REFRIGERATION Filed Nov. 8, 1930 5 Sheets-Sheet 1 Jwum Dec. 5, 1933. .s. E. LINK 1,937,705

REFRIGERATION Filed Nov. 8. 1930 5 Sheets-Sheet 2 Jwumtou Dec. 5, 1933. v s. E. LINK REFRIGERATION Filed Nov. 8. 1930 3 Sheets-Sheet 3 EW-f Patented Dec. 5, 1933 UNITED STATES PATENT OFFICE Claims.

This invention relates to refrigeration and it is an object of the invention to provide a process and equipment of this character wherein refrigeration is maintained within the limits of the 5 maximum and minimum temperatures obtainable by the use of carbon-dioxide ice.

It is also an object of the invention to provide a process and equipment of this kind which can be readily employed for household purposes, commercial purposes, in connection with truck bodies, refrigerator bodies, and other storage rooms or containers.

Another object of the invention is to provide r a process and equipment of this kind which operates to provide such conditions as regards humidity within the refrigerating chamber or container that as a consequence foods placed in such chamber or container will not dry out.

An additional object of the invention is to provide a refrigerating equipment as a unit and of a type suitable for containing carbon-dioxide ice, the unit to be built of a size suitable to the type or character of box, chamber or the like to be refrigerated.

A further object of the invention is to provide an equipment of this kind wherein the unit is composed of two containers, one Within the other, and providing a circulation space between the containers, together with coils arranged within the space between the containers through which passes the carbon-dioxide gas outflowing from the inner container, said coils being so arranged that the carbon-dioxide gas passing 'therethrough absorbs the maximum amount of heat from the air passing over the coils and through the intervening space of the unit so that the temperature of the escaping carbondioxide gas is maintained very close to the refrigerator temperature.

A still further object of the invention is to provide equipment of this kind wherein the desired circulation of air within the box, chamber,

container or the like is maintained without use of a fan or other mechanical means and wherein the ceiling of said chamber, box, container or the like is arched to facilitate the maintenance of the desired air circulation.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved equipment whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better -understood, I will now proceed to describe the.

same with reference to the accompanying drawings, wherein:-

Figure 1 is a view in perspective of a refrigerator embodying my invention, certain of the doors of the refrigerating box being omitted;

Figure 2 is a fragmentary front elevational view with portions broken away of the upper portion of the refrigerator as illustrated in Fig-' Figure 3 is a view in perspective of the carhon-dioxide box as herein comprised unapplied;

Figure 4 is a transverse sectional view taken through the box as illustrated in Figure 3 and substantially on the line 4-4 f Figure 5;

Figure 5 is a sectional view taken substantially on the line 5-5 of Figure 4. 7

As herein disclosed, R denotes a refrigerator box of a type especially designed for household use and which is divided by a vertically disposed partition 1 into said-compartments adjacent the top and bottom thereof and at a point substantially midway being in communication with each other through the suitably provided openings or recesses 2 in the partition 1.

The compartments A and B are sub-divided in a well known manner by the horizontally disposed partitions or shelves 3. These partitions or shelves 3 are of a preferred type so that desired circulation of air may be had within the box R and which circulation is materially facilitated by having the ceiling wall 4 of the box arched from side to side.

As is believed to be obvious the forward access to the compartments A and B is had through suitably positioned openings in the front wall thereof and which openings are adapted to be closed in aponvention'al manner by doors.

The upper partition or shelf 3 within the compartment A is adapted to support a refrigerating unit U. This unit U comprises an outer box X and an inner box Y, the box Y being supported within the box X in a manner to provide an intervening air space 5. The side and top walls of the outer box X are of a desired insulation type while the bottom wall 6 is provided with a,

relatively large central opening 7 affording communication with the portion of the chamber A below the applied unit U.

. The top wall 8 of the unit U is provided with a relatively large opening 9 defined by a laterally facing hood or duct 10 disposed above the top wall 8 and with its open face disposed toward the chamber B. This hood or duct 10 together with the arched culation of the air within the box R when of course the front openings are closed.

Coa'cting with the open or entrance face of the hood or duct 10 is a damper or valve 11 herein two compartments A and B,

ceiling 4 assure an eifective cir- 1 disclosed or a butterfly type, and a supporting trunnion 12 of which carrying a crank 14 with which is operatively connected the thermostat 15. The thermostat 15 may be of any type pre-' ferred and is suitably mounted within the box R and provides means whereby the damper or valve 11 is caused to automatically open and close in accordance with the temperature within the box R.

The inner box Y provides a chamber 16 in which is to be placed a supply of carbon-dioxide ice and the gas created within said chamber 16 flows out through the coil 17 in communication with the lower portion of the chamber 16, said coil being herein disclosed as positioned within the intervening space 5 at the opposite sides and to the rear of the box Y. The coil 17 is also formed to overlie the top wall 18 of the inner box Y and extending from this upper portion 17' of the coil into the second compartment B of the box R is a pipe line 19 formed to provide a second coil 20 disposed closely adjacent to the ceiling 4 above said compartment Band extending a desired distance down along the outer side wall 21 of said compartment B. Thecoil 20 is continued by a carry-oil pipe 22 extending exteriorly of the box R to a suitable point ofdischarge, thus avoiding contamination of the food within the box R by the carbon-dioxide gas.

Access within the chamber 16 is out through a front door 23 of a conventional type and the box Y below the bottom wall 24 thereof is provided with compartments 25 to receive suitable cube trays or cooling pans.

As the carbon-dioxide ice evaporates the gas flows out through the coils 17 and 17 and out' coil 20. The air circuthe outer through the pipe 19 and lating within the box R passes through box X and around the inner box Y, such circula--.

tion being under control of the damper or valve 11 through its action by the thermostat 15. The C02 gas within that portion of the coil 20 extending down along the outer side wall of the compartment B is obviously not quite so cold as at the start of its flow, which condition promotes the deposit of a relatively soft frost or snow upon the outer surface of this portion of said coil from which the air within said compartment is adapted to absorb moisture more readily than from the solid icy deposits upon the colder portions of the coil, so that there is maintained within' the refrigerator box R the proper humidity.

It is believed to be obvious that as the air circulates over the various coils the carbon-dioxide gas passing therethrough absorbs the maximum amount of heat from the air and that the placement of the coils is such to maintain the temperature of the escaping carbon-dioxide gas very close to the desired refrigerator temperature. This has the advantageous result of reducing the consumption of carbon-dioxide ice to a minimum.

Cubes, desserts and the like can be very quickly frozen within the compartments 25 which are arranged immediately below the carbon-dioxide ice chamber 16.

From the foregoing description it is thought to be obvious that an equipment constructed in accordance with my invention is particularly well adapted for use by reason of the convenfence and facility with which it may be assembledand operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:-

1. A refrigerating apparatus comprising a receptacle, a box within the receptacle, a second box supported within the first box with an intervening space between the boxes, said inner box constituting a chamber for carbon-dioxide ice, a coil within the space between the boxes and in communication with the carbon-dioxide ice chamber, the upper and lower portions of the first box having openings to permit circulation of air between the boxes and around the coil, said coil extending exteriorly of the first box and disposed down from above along a side wall of the receptacle.

2. A refrigerating apparatus comprising a receptacle, a box within the receptacle, a second box supported within the first box with an intervening space between the boxes, said inner box constituting a chamber for carbon-dioxide ice, a coil within the space and -lower portions respectively, an inner box supported within the first box and providing a carbon-dioxide ice chamber, said boxes being in spaced relation to each other for providing an air-flow space therebetween and entirely surrounding said inner box, and a coil in commu-' nication with said inner box and arranged within the space intervening between the two boxes, said coil also overlying the top wall of the inner box.

4. A refrigerating unit comprising a box having openings in its upper and lower portions, a hood associated with one of said openings, a valve coacting with the hood, a second box supported within the first box with an intervening space between the boxes, said second box providing a chamber for carbon-dioxide ice, and a coil in communication withthe inner box and arranged within the intervening space between. the boxes.

5. A refrigerating unit comprising abox having openings in its upper and lower portions, a hood associated with one of said openings, a valve coacting with the .hood, a second box supported within the first box with an intervening space between the boxes, said second box providing a chamber for carbon-dioxide ice, a coil in communication with theinner box and arranged within the intervening spacebetween the boxes, the hood being at the upper portion of the inner box, and thermostatic means for operating the valve.

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