US1900742A - Evaporator - Google Patents

Description

Patented Mar. 7, 1933 UNITED STATES PATENT OFFICE' FRANKLIN G. SLAGEL, OF BO'FFALO, NEW YORK, ASSIGNOR T FEDDERS MANUFACTUR- me COMPANY, INC 01 BUFFALO, NEW

YORK, A CORPORATION OF NEW YORK EVAPORATOR Application filed August 13, 1930. Serial No. 475,032.

This invention relates to mechanical refrigerating systems and more particularly to evaporators. v

An object of my invention is to provide an evaporator unit for refrigerating systems which provides a plurality of fluid freezing 'chambers as well as abstracting heat from a medium circulating adjacent thereto.

Another object of the invention is to pro; vide an evaporator for refrigerating'systems in which a plurality of freezing chambers are formed by tube loops extending from one end of a header.

A further object of the invention is to provide a plurality of superposed freezing chambers formed by a header and the association therewith of the tube loops bent to extend vertically and then horizontally.

Other objects of the invention will appear from the following description taken in connection with the drawing, which forms a part of the specification, and in which:

Fig. l is a side elevational view of an evaporator incorporating the invention, a portion of the header being broken away to show the refrigerant control mechanism.

Fig. 2 is an end elevation of the evaporator. Fig. 3 is a View looking at the bottom of the evaporator.

Referring now to the drawing by characters of reference, the header comprises a' cylindrical shell 10 open 'at one end, and a closure plate 11 secured in leak proof relation with the open end of the shell. An outlet passage 12 extends through the upper portion of the end plate, and an outlet tube 13 is secured in such passage and extends interiorly of the header. Secured to the end plate by bolts 14, in communication with the outlet passage, is a union 15 which is connected withthe compressor (not shown) of a compressor-condenser-evaporator refrigerating system. An inlet passage 16 extends through the lower portion of the end plate, and a. union 17 is secured to the exterior of the end plate by bolts 18 in open communication with the inlet passage. The union 17 is connected with the condenser (not shown) of the refrigerating system.

Automatic means is provided interiorly of A that the horizontal the header to maintain a substantially constant body of liquid refrigerant in the evaporator. A valve seat 19 is arranged in the inlet passage in the end plate and a needle valve 20 is reciprocated by an open float 21 to open and closethe passage through the valve seat member. The float is pivoted at 22 to the end plate and the needle valve is connected thereto. As the liquid refrigerant in the evaporator vaporizes the float lowers with the liquid body level .thus moving the valve away from closing relation with the seat member, while apredeterminedbody level raises the float to cause the valve to seat and stop the liquid flow through the inlet passage. The tube 13 is bent to extend into the open float, and oil collecting linthe float as well as .gasified refrigerant are drawn through the portion 25 is bent to extend horizontally be-' neath the header in the form of double reverse loops. The vertically extending legs of the tubes are of different lengths relatively so portions are superposed, thus defining a plurality of freezing spaces. The ends of each tube extend preferably through the rear end of the header so that they are in communication with the body of liquid refrigerant therein, the tubes being secured to the header by soldering or other suitable means.

A rectangular sheet metal sleeve 30 is arranged intermediate adjacent horizontal tube sections, and in intimate contact therewith, to form enclosures for receiving pans 31. The pans are adapted to contain fluid to be frozen and can be inserted through the front end of the sleeves. A brace 32 extends between the upper sleeve and the front end of the header. I

It will be seen that the evaporator consists essentially of a header and tubes, and that the tubes are entirely supported by the rear end of the header. A plurality of freezing chambers are formed wlth a minimum number of tubes and interposed sleeves.

Although this invention has been described 5 in connection with certain specific embodiments, the principles involved are susceptible of numerous other applications which will readily occur to persons skilled in the art, and the invention is therefore to be limited only as indicated by the scope of the appended claims.

What I claim is: 1. In an evaporator for refrigerating systems, a header, means for automatically controlling liquid refrigerant to maintain a body thereof in the header, means for removing gasified refrigerant from the header, and a plurality of tubes having their ends secured to and extending through the rear end of the header below the level of the body of refrigerant, said tubes each being bent to form horizontally extending loops, the horizontal loops of the respective tubes being in respective superposed horizontal planes.

2. In an evaporator for refrigerating systems, a header, means for maintaining a body of liquid refrigerant in the header, means for tubes secured to the rear end of the header in communication with the body of liquid refrigerant, said tubes having vertically extending legs and horizontally extending parallel loop portions intermediate the legs, said legsof the tube being of different length, and sleeves intermediate the horizontal loops of the tubes and in intimate contact therewith.

6. In an evaporator for refrigerating systems, a header, means for maintaining a body of liquid refrigerant in the header, means for removing gasified refrigerant from the header, a plurality of tubes having their ends connected to the header and in communication with the liquid body of the header, said tubes having parallel leg portions and bent horizontally extending loop portions, the horizontal loops of the respective tubes being in respective superposed horizontal planes, the leg portions of the several tubes being of different lengths for producing a plurality of freezing chambers by the superposed arrangement of horizontal loop portions.

In test mony whereof I affix my signature.

FRANKLIN G. SLAGEL.

removing gasified refrigerant from the header, a plurality of tubes having their ends secured to and extending through the rear end of the header below the level of the body of refrigerant, said tubes each being bent to form horizontally extending loops, the horizontal loops of the respective tubes being in respective superposed horizontal planes, and sleeves intermediate the horizontally extending loops and in intimate contact therewith.

3. In an evaporator for refrigerating systems, a header, means for maintaining a body of liquid refrigerant in the header, means for removing gasified refrigerant from the heador, and a plurality of tubes having their ends extending through and secured to the rear end of the header in communication with the body of refrigerant, said tube end portions extending vertically and the central portions being. looped and extending in superposed horizontal planes beneath the header.

4. In an evaporator for refrigerating systems, a horizontally extending header, means for maintaining a body of liquid refrigerant in the header, means for removing gasified refrigerant from the header, and a plurality of tubes having their ends secured to and extending through the rear end of the header in communication with the body of liquid refrigerant, said tubes having vertically extending legs and horizontally extending reverse looped portions intermediate 60 the vertically extending legs.

5. In an evaporator for refrigerating systems, a horizontally extending header, means for maintaining a body of liquid refrigerant in the header, means for removing gasified 65 refrigerant from the header, a plurality of

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