USRE20558E

USRE20558E - Refrigerating apparatus

Info

Publication number: USRE20558E
Authority: US
Publication date: 1937-11-16

Description

Nov.16, 1937. R; R. CANDOR 20558 'REFRIGERATING APPARATUS Original Filed Nov. 29, 1930 Sheets-Sheet 1 5.9 F v A:

4 7 lN-VENTOR 5 I ATTORNEYS Nov..16, 1937. R. R. CANDOR REFRIGERATING APPARATUS 2 Sheets-Sheet 2 Original Filed Nov. 29, 1930 ATTORN EYS Reissued Nov. 16, 1937 UNITED STATES PATENT OFFICE BEFRIGEBATING APPARATUS now a. candor, Dayton, Ohio, assignor, by

meme assignments, to General Motors Corpo- I ration, a corporation of Delaware Original No. means, dated February 28, 193:,

Serial No. 499,040, November 29, 1930. Application for reissue February 14 Claims.

controlled by the "one desiring to drink for seinvention will be apparent from the following de'-' scription, reference being had to the accompanying drawings, wherein a preferred form of th present invention is clearly shown.

In the drawings: Fig. 1 is a sectional view of a drinking water cooler embodying one form of my invention, and Fig. 2 is a sectional view of a drinking water cooler embodying another form of my invention. Fig. 3 is a sectional view ofv a drinking water cooler embodying a further form of my invention. 7

Referring to the drawings and more particularly to Fig. i, there is showna drinking water cooler cabinet 2. which is supplied with water suitable for drinking purposes from an outside source through the conduit 2| and through a pressure reducing valve 22 which automatically limits the pressure of the water in the cooler to provide the proper height of discharge at the bubbler hereinafter described regardless of the 40 pressure in the source 2|. A pair of water reservoirs or tanks 23 and 24 arepositioned within the cabinet and connected to the pressure reducing valve 22 by the conduit 25. These reservoirs are provided with suitable vents 59 for providing for the escape of trapped air when the reservoirs are being fllled. The upper portion of the cabinet 2| is filled with suitable insulation 58 which surrounds the reservoirs 23 and 24 and connecting conduits.

In accordance with the present invention,

as, 1935, Serial No.

means are provided for cooling the water in the reservoirs 23 and 24 to different temperatures. To this end a refrigerating system is positioned preferably in the lower part of the cabinet 20.

In Fig. 1 for illustrative purposes there is shown diagrammatically a refrigerating system of the compressor-condenser-expander type including a compressor 3| for compressing the refrigerant, preferably sulphur dioxide, and for' forwarding it to the condenser 32- where it is liquefied and collected in the receiver 33. A supply conduit 36 supplies liquid refrigerant to a float chamber 31 positioned within the reservoir 23 where the liquid refrigerant vaporizes because of the absorption of heat and is returned from the compressor through the return conduit 38. The actuating means for the compressor preferably comprises a motor 34 connected by pulley and belt means 35 to the compressor. A pressure responsive switch means 39 'is preferably connected to the return conduit 38 for controlling the motor 34 to provide alternating operating and idle periods of the compressor according to the pressure and consequently the temperature of the float chamber 31. The water in the reservoir 34 is-- cooled by a cooling member 4| which is supplied with liquid refrigerant from the float chamber 31 through the conduit 42 past the valve 43 and through the conduit 44. The valve 43 is controlled by a thermostatic bulb 45 positioned in the water reservoir 24. The opening of the valve the'top oi the cooling'member 4| and forces liquid refrigerant out of the cooling member 4| through the conduit 46 connected'to the bottom thereof. This conduit 46 conducts liquid refrigerant to a reservoir 41 preferably positioned above the level of liquid refrigerant within the float chamber 41. A conduit 48 is connected to .the float chamber 31.

the top of the reservoir 41 to conduct displaced gaseous refrigerant through a conduit 49 into By means of this system which includes the conduits 42, 44, 4G, 48, 49 and 50 as well as the valve 43, the cooling memher 4 I, the reservoir 41 and the thermostatic bulb 45, the temperature of the water within the reservoir 24 may be regulated. I

The valve is opened and closed at proper times so that only the proper amount of liquid refrigerant is kept within the cooling member 4| to keep the water in the reservoir at the temperature to which the thermostatic bulb 45 is set. According to the present invention, the thermo-. static bulb 45 is set to cool the water in the reservoir 24 a lesser amount, that is to maintain a higher temperature than that of the water in the reservoir 23, the temperature of which is controlled by pressure responsive switch means 39.

Conduits 5I and 52 are connected to the bottom of each of the water reservoirs'23 and 24 and conduct the cooled water to a combined control and mixing valve 53 which both turns off and on the water as well as varies the ratio between the amount of water from each of the water reservoirs 23 and 24 through the conduit 54 to the bubbler or fountain 55. By properly manipulating the operating handle 55 of the mixing valve 53, any desired ratio of water from the reservoirs 23 and 24 may be obtained in order to obtain the desired temperature of water in the fountain or bubbler 55 while the valve 22 limits the pressure at the bubbler 55 to provide the proper height of discharge from the bubbler 55. The cabinet 20 is provided with a catch basin 51 to catch the water, discharged from the fountain 55. l

' In Fig. 2 there is shown another embodiment of the invention which includes a drinking water cooler cabinet provided with a fountain or bubbler BI and a catch basin 52. Situated within the upper portionof the water cooler are a pair of

water reservoirs

53 and 54 which are supplied with water suitable for drinking purposes through the conduit 55 which connects the reservoirs to a suitable source of supply. These

reservoirs

53 and 64 are provided with

suitable vents

65 and 55 for permitting the escape of air when the reservoir is being filled. The

reservoirs

63 and 54 respectively are cooled by

cooling units

61 and 58 which are supplied with liquid refrigerant through the conduit 59 and the conduit I0 from a refrigerating system, preferably similar to that previously described, which, as before, is pref- L erably situated in the lower part of the cabinet of the drinking water cooler 60. The gaseous refrigerant is withdrawn from the

cooling units

51 and 68 through the conduit I I The water within the reservoir 64 is cooled to a lesser degree than the water within the reservoir 63 since the valve I2, which is controlled and operated by the thert, mostatic bulb I3 positioned within the reservoir handle II for controlling the ratio of the amount of water which is taken from each of the conduitsli and 16. The mixing valve in this embodiment is connected by a conduit 19 to a combined automatic pressure and flow control valve which controls the flow and pressure of water through'a conduit 8| to the bubbler or fountain GI and automatically limits the pressure, so that the water is discharged at the proper height from the bubbler GI regardless of the amount of turn of the handle 80a and regardless of the pressure in pipe 55. By moving the operating handle I8 of the mixing valve 'I'I to the proper position, any desired temperature of water within reasonable limits may be obtained.

The arrangement is, therefore, such that the refrigerant flows in parallel through the evaporators G1 and 68. The relatively cold evaporator 61 inside the cold storage tank or reservoir 63 cools the liquid in the tank where it remains in readiness to supplement or substitute the refrigerating action imposed upon a fluid by the evaporator 68.

In either modification the warmer water reservoir may be an uncooled by-pass around the colder water reservoir so that the branch 83 can discharge directly into the pipe 52 without passing through reservoir 24 and the pipe 02 can'discharge directly into pipe IS without passing through reservoir 54.

Thus in Fig. 3 there is shown a water' cooler in which the warmer water reservoir is not used or has been omitted, and in which the uncooled by-pass is provided around the cooled water reservoir. In this modification a compressor I00 forwards compressed refrigerant to a condenser IOI which in turn discharges into the liquid rjefrigerant reservoir I02. flows through the line I03 to the refrigerant evaporator I04 through the fixture I05. The evaporated refrigerant returns through the fixture I05 into the line I01 and back to the compressor I00. The temperature of the liquid refrigerant in the evaporator I04 is maintained at a substantially constant temperature by any suit-. able means, such as an expansible bellows I08 connectedto the line I01 and controlling a snap switch I09, which in turn controls the starting and stopping of the motor IIO which drives the compressor I00. The evaporator I04 may be of the type now recognized in the art, an example of which ismore fully disclosed in the patent to R...

G. Osborn 1,556,708, patented October 13, 1925. The water cooler is provided with a source of drinking water I I I, which may be connected to the city water supply or any other source of drinking water, preferably under pressure. A portion of the water coming from the supply I I I is introduced into the drinking water reservoir H2 and is discharged therefrom through the conduit I I3. Means are provided for by-passing another portion of the water coming from the water supply III, and to this end a conduit III is connected to the pipe III and joins the conduit II3 through the medium of a mixing valve I I I5, which mixing valve may be adjusted to varyv the ratio of water flowingthrough the conduits H3 and- H4. From. the mixing valve II5, the water is discharged through the bubbler III through the medium of a combined float control and pressure control valve I I! which maintains a constant discharge pressure at the bubbler H6, and which can shut oil and turn on the flow of liquid to the bubbler ll6 by the operation of a handle IIS. Devices of the character disclosed at H5 and III are now well-known inthe art, and need not be described further. By the embodiment shown in this figure, a person may vary Liquid refrigerant than thereafter manipulating the handle ill to start.

the flow of water through the device Hi.

By means of the invention disclosed herein it is possible for a' person to obtain almost instantaneously drinking water of the desired temperature ,without waiting for a large quantity of water to be cooled or tempered for his own particular purpose. As soon as a small quantity of water has been discharged, so thatthe standing water in the conduits III and II has been discharged it is possible for such a person to obtain the desired drinking water temperature within the range of the temperature within the reservoir III and in the water supp y Ill.

While the form of embodiment of the invention as herein disclosed constitutes a preferred term, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. In a drinking water cooler, the combination of a unitary drinking water discharge device and means for securing the discharge of water at various desired temperatures from the discharge device including a source of drinking water, means of a substantially constant temperature for cooling a portion of the water, means for mixing in variable ratios the cooled portion with another portion of water from said source 'of drinking water and discharging said mixed portions from the discharge device.

2. In a drinking water cooler: a source of drinking water, a reservoir receiving drinking water from said source, means of -a substantially constant temperature for cooling the water within the reservoir, a drinking water discharge device, means for by-passing a "portion of water from said source around said reservoir without subjecting it to the cooling action of said reservoir, and means for mixing and discharging in one stream in variable ratios the water from the reservoir and the by-passed portion to secure a desired temperature.

3. In a drinking water cooler, a cabinet, a drinking water discharge device connected to the cabinet, and means for securing the discharge of water at any desired temperature from the discharge device including a source of drinking water, means within the cabinet for automatically cooling a portion of the water supplied, controllable means for mixing in variable ratios the cooled portion and another portion of the water from said source, and means for conducting the mixed water to the discharge device.

4. In a drinking water cooler, a bubbler, means for connecting said bubbler toa source of drinking water under pressure, nieansi'or cooling at least a portion of the water, meansfor mixingthe cooled water with warmer water from said source and discharging the mixture from the bubbler in I one stream, and unitary manual control means for varying the ratio of the cooled water and the warmer water.

5. 'In a drinking water cooler, a pair of water reservoirs connected to a source of water supply,

means for cooling the water in one of the reservoirs to one temperature, means for maintaining the water in the second reservoir at a second temperature, and meansfor mixing and discharging waterin one stream from said'reservoirs.

ing the water in the second reservoir at a second temperature, means for mixing and discharging W8,t1' from said 58170118 in one stream and means for varying the ratio of waterdischarged from said reservoirs.

7. In a drinking water cooler, a pair of water reservoirs having means for connecting to a source of water supply, means for cooling the waterin one of the reservoirs to one temperature, means for maintaining the water in the second reservoir at a second temperature, means for mixing and discharging water irom said res-'- ervoirs in one stream and means for varying the temperature of the discharged water.

8. A drinking water cooler including a water discharge device, a refrigerating system, a source of water, means for thermally contacting water from said source with said-system to cool the water, and meansindependent of said refrigerating system for varying the temperature of the water discharged from said device.

9. A drinking water cooler, including a water discharge device, a refrigerating system, an automatic temperature control for said system, a'

source of water, means for thermally contacting water from said-source with said system to cool the water, and means for varying the temperature of the water discharged from said device independently of thecontrol of the refrigerating system.

10. In a drinking water cooler, a bubbler, means for connecting to a source of drinking water, means for cooling at least a portion of the water, means for mixing the cooled water with warmer water and discharging the mixture from the bubbler in one stream, control.means for varying the ratio of the cooled water and the warmer; water discharged from said bubbler, means for controlling the discharge of water from said.bubbler and means for automatically limiting the pressure of the water discharged-at said bubbler regardless of the pressure of the source of the drinking water.

11. In a refrigeratingsystem, a cold storage tank containing a cooled liquid, a refrigerating evaporator positioned inside the tank, a refrigerating evaporator positioned outside said tank and cooling a medium, the two evaporators being. connected in parallel, means for circulating a refrl'gerant through either one of said evaporators,

and means 10! conveying cooled liquid to aid in cooling said medium;

12. In combination, a relatively refrigmeans in: circulating said cooled liquid in thermal contact with said medium; 13. In a refrigerating system, a cold storage evaporator, a tank containing cooled liquid, and

tank, a refrigerating evaporator positioned inside the tank a refrigerating evaporator positioned outside said tank, the two evaporators. being con nected inparallel, me'ansfor circulating a refrigerant alternatively through either one ofsaid I,

- evaporators, and means for utilizing cooled liquid from said tank outside said tank in thermal exchange with fluid cooled by said coil positioned outside said tank. v e

14.-In combination, means for circulating a flowing-fluid from a source to a place of use, a plurality of evaporators in parallel refrigerant flow relationship, means for automatically circulating refrigerant at different temperatures and at different times in said evap'orators, one of said evaporators being in thermal contact with said flowing fluid, a tank, the other of said evaporators-being in thermal exchange relationship with said tank, and means for flowing liquid from said tank into contact with said flowing fluid to vary the temperature of said fluid.

ROBERT R. cANDoR.