US1829408A

US1829408A - Refrigerating apparatus

Info

Publication number: US1829408A
Application number: US250406A
Authority: US
Inventors: Jesse G King
Original assignee: Frigidaire Corp
Current assignee: Frigidaire Corp
Priority date: 1928-01-30
Filing date: 1928-01-30
Publication date: 1931-10-27
Anticipated expiration: 1948-10-27

Description

Oct. 27, 1931. .1. 3. KING 1,829,408

REFRIGERATING APPARATUS Filed Jan. 30, 1928 alien-1:1

Patented Oct. 27, 1931 UNITED STATES PATENT OFFICE JESSE G. KING, OF DAYTON, OHIO, ABSIGNOB TO FRIGIDAIBE CORPORATION, OF DAYTON, OHIO, A CORPORATION OI DELAWARE BEIBIGEBATING APPARATUS Application filed January 80, 1928. Serial No. 250,406.

The present invention relates to improvements in refrigerating apparatus and more particularly to devices adapted for rapidly cooling drinking water or other liquids.

It is an object of the invention to provide a refrigerating apparatus by means of which a relatively continuous supply of cold water may be secured without requiring large capacity storage containers.

It is another object of the invention to arrange the water and refrigerant circulating elements of the device so that in case of aceidental freezing of the water and breaking of the water-carrying pipes the refrigerating circuit will not be deranged.

With these and further objects in view the invention contemplates providin a refrigerating device in which a series 0 concentric pipes are used for circulating the water and refrigerant and which are connected to a refrigerant circulating system and a source of water supply in such a manner as to rovide a compact structure and eflicient an rapid heat exchange between the refrigerant and 5 the liquid to be cooled.

Further objects and advantages of the present invention will be'apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Fig. 1 illustrates the improved refrigerating device mounted for use in a cabinet of the Water cooler type;

Fig. 2 is a cross-section through the improved refrigerating element of the invention and its associated coils, showing a preferred embodiment of the invention, and

Fig. 3 is a similar view of a variation of the refrigerating element.

Referring in detail to the drawings, the refrigerating element comprises a heat exchange device in which a refrigerating medium such as sulphur dioxide is caused to expand producing a reduction of temperature in the well-known manner. In the preferred embodiment of the invention as illustrated an evaporator of the flooded system 60 with its associated coil of pipe constitutes the heat exchange device, although it will be understood that an suitable refrigerating system may be use in carrying out the invention and that an expansion valve or an absorption system may likewise be used. When the evaporator or flooded type of device is used the refrigerating element consists as shown in the drawings, of a container or tank 10 containing a suitable refrigerant such as liquid sulphur dioxide indicated by 11 which is supplied to the tank by means of pipe 12 and which in a gaseous state is withdrawn from the tank by means of pipe 13 connected with a compressor unit not shown. The level of the liquid within the tank 10 is kept constant by means of a valve 14 controlled by a float 15.

Suspended from the tank 10, which may also be termed a header, and preferably below said tank, is a pipe system comprising a coil 17 in the case of the structure shown in Fig. 2 and bent loops 16 arranged in a to-and-fro manner in two sets as shown in Fig. 3.

Disposed within and concentric or telescoping with the coil 17 in the case of Fig. 2 is another coil 18 shown by the dotted lines. This coil is connected to the header by means of pipe sections 19, 20 and serves to hold refrigerating medium. The coil 17 which telescopes or surrounds the pipe 18 serves for the circulation of water, the inlet and outlet of which are indicated by 21, 22.

In the modification shown in Fig. 3 the pipe 16 is connected to the header by means or

branches

23, 24 and serves to contain refrigerant, While a pipe 25 concentric or telescoping with pipe 16 and located inside thereof as shown by the dotted line is used for conveying water, its

extremities

26, 27 represent ing the water inlet and outlet points.

It will be observed therefore that the refrigerating element comprises coils of concentric pipes, one of which conducts a refrigerant and the other of which conveys water. The water in either case gives up its heat to the refrigerating medium which boils off in its own tube and returns to the header as a gas which bubbles up through the body of liquid in the header. It is withdrawn from the header through pipe 13 and subsequently I condensed and as a liquid p 12 through of the water congealing and possibly rupturin the water-carrying pipe. In such a case it is desirable to prevent damage to therefrigerant carrying pipe and consequent entry of water into the refrigerant circulating circuit.

By placing the water pipe exteriorly to the refrlgerant-carrying pipe such danger is obviated since if the water congeals it will tend to burst outwardly and while the resulting leakage of water may be annoying the break will cause less" damage than if the water should find its way into the refrigerant umping circuit, which might occur if the re- ?rigerant-carrying pipe was ruptured.

In cases where such danger of congealing does not exist, such as in installations where the water is merely cooled to a predetermined degree, it may be advantageous to use the structure shown in Fig. 3 wherein the refrigerant circulating coil is disposed exter orly with respect to the water-carrying plpe.

Referring to Fig. 1 the water cooling'apparatus of the invention is shown mounted 1n a cabinet of the water cooler type. The cooler comprises a cabinet 30 having walls 31 enclosing a chamber in which'the refrigerating element is mounted. The element may be supported within the cabinet as by means of straps or hangers 33 passing around the body of the header 10 and fastened to a portion of the body of the cabinet by means of bolts 34. The header is connected with the refrigerant-pumping circuit or unit by means of the su ply and

withdrawal pipes

12, 13 above re erred to. Water may be supplied to the cooling-coil through pipe 35 and may be withdrawn from a faucet 36 or the like, a glass holder 37 and drain pipe 38 being provided if desired, or else a fountain mouthpiece of the bubbling variety.

. .The interior of the compartment 39 is filled with a heat insulating material such as kapok or the like. The compressor unit which is used to circulate the refrigerating medium may be disposed in the machine compartment 40 of the cabinet. a

By means of the device illustrated and described, it is possible to secure a relatively continuous supply of cooled water without the use of storage containers. By the structure of concentric pipes shown, a ra id heat exchange is effected etween the re igerant and the water to be cooled. In addition danger of damage to the refrigerating circuit is obviated by means of the pipe construction shown in which the congealing water exerts its expansive force outwardly thus. I

prevents rupture' of the refrigerant-carrying i 'hile the form of embodiment of the present invention as herein disclosed constitutes atgpreferred form it is-to beunderstood that 0 er forms might be adopted. all coming within the sco What'is clalmed is 'as follows:- 7

. 1. A liquid cooler comprising a refrigerant level maintainin header, a depending pipe system associate therewithinc uding a plurality of pi es, one telescoping with the other, one 0 said pi es being connected to said header at both ends to'maintain refrigerant li uid circulating within said pipe and the ot er of said pi'pesbeing adapted to circulate the li uid to be cooled within said pipe, the liqui in contact with the other pipe.

2. A liquid cooler comprisin a refrigerant level maintaining header an a depending coil of pipe associated therewith at both ends in refrigerant circulating relation, and a coil exterior thereto and telescoping therewith and adapted to circulate the liquid to be in one of said pipes being of the .claims which follow.

cooled in contact with said refrigerant cir- I culating coil.

3. A liquid cooler comprising a refrigerant container and means for supplying said container with a constant quantity of liquid refrigerant, a helical coil de endin said container and connected in refrigerant circulating relation therewith at both ends and a coil exterior thereto and telescopin therewith and adapted to circulate the liqui to be cooled in contact with said refrigerant circulating coil.

4. A liquid cooler comprising a container for holding a refrigerating medium, means for maintaining a constant level of refrigerant in said container, a pipe system associated with said container and including a plurality of ipes, one telescoping withthe other, one of said pipes being connected to said container at a plurality of points to maintain refrigerant liquid circulating with in said pipe and the other of said pipes besignature.

ESSE G. KING.

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