US1838260A - Central cooling plant - Google Patents

Description

Dec. 29, 1931. JACOB 1,838,260 I CENTRAI COOLING PLANT Filed Nov. 1 1929 is 122 yen 02".

Patented Dec. 29, 1931 UNITED STATES EMIL JACOB, OF EILENB'b'RG, GERMANY, ASSIGNOB TO ADOLF KERN, OF FRANKEOZBT- PATENT OFFICE ON-IHE-MAIN, GERMANY CENTRAL COOLING PLANT Application filed November 19 1929, Serial No. 408,305, and in Germany October 8, 1929.

This invention relates to a central cooling plant, the novel feature of which consists in that in the tube system of the central heating plant, serving for artificially heating living, working, and other rooms in winter, a refrigerator or other cooling plant with one or more water circulating pumps, injectors or the like, is connected so that the piping is filled with cooling liquid and supplied to radiators fitted up in the rooms, which radiators absorb heat. The steam traps connected with the heating system in the case of low pressure steam heating, which would impede the circulation of the cooling liquid, are bridged over by a by-pass with a shutting ofl valve.

This arrangement resents the advantage, that the plant usual y serving for heating, may be used in hot weather, after disconnecting the heating boiler, for cooling living, working, or other rooms. At the same time the arrangement of the by-passes when using the steam boiler has the advantage that the Water of condensation contained in the radiators can be quickly led off whereby the heating efi'ect is favorably influenced. The valve built in the by-pass is opened during the heating period only for quickly draining off the water of condensation collected in the heating radiator and again closed, after this water has been drained oif, thereby doing away with the otherwise tiresome readjustment of the adjusted steam trap.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which Fig. 1 shows a diagrammatical view of a low pressure steam heating plant.

Fig. 2 shows a radiator on a larger scale with the by-pass bridging the steam trap.

In the cellar a heating apparatus (steam boiler) a is arranged with a riser pipe 6, through which the water is conveyed to an expansion vessel 0, situated at the highest point of the plant, and through pipes d to radiators 6. From these radiators the water passes back to the boiler a throu hthe return pipes f, 9 connected therewit The low pressure steam heating plant described, in the return pipe f of which steam traps k are arranged which serve to ensure the free outflow of the condensed water, is already known. Instead of this plant a hot water heating plant or any other central heating plant could be used.

In order to enable such a heating plant to be used during hot weather for cooling the rooms in which the radiators are fitted, a refrigerator is or other suitable cooling device is connected up in the plant to the pipes b, g by means of T-pieces 2'. Through this cooling device cold emitting medium such as cold water or the like is fed to the riser pipe I) through the cooling coil 10' with the aid of a connecting pipe Z, in which a water circulating pump at is inserted and effects the circulation of the cooling medium. From this riser pipe the cold water passes into the radiators e mounted in the different rooms or stories and through the return pipes f, 9 connected with these radiators and a pipe 0 connected to these return pipes, into the pipe coil k'jnserted in the cooling plant. By inserting shut off valves p and g in the feed pipe 6 and return pipe 9 respectively or in the case of low pressure steam heating by inserting such valves in the pipesb, g the steam boiler will be disconnected from the plant. Each radiator is provided with a sweat catcher 'v for catching the sweat dripping therefrom. The exposed feed pipes are insulated to prevent the formation of sweat.

As the steam traps It used in the low pressure steam heating plant prevent the circulation ofthe hot fluid, they are bridged in a suitable manner by a by-pass r. This arrangement presents several advantages, owing to the fact that during the heating period the water of condensation, which has collected in the radiators, can be quickly drained ofl, thereby considerably increasing the heating effect. A valve 8 is built in the by-pass 1' which, during the heating period is only open for quickly drawing ofi the water from condensation which has collected in the radiators e and is again closed after this water has drained ofi, wherebythe troublesome readjustment of the adjusted steam trap 15. is no longer necessary. This latter, in the construction shown by way of example, consists of a vessel, in which a spring 25 acted upon by the flowing water or steam and subjected to expansion through heat is arranged, which spring expands when the steam is en- 5 tering the vessel h and closes the small valve I situated on the left hand side on the admission pipe. This steam-water draining device might also be of different type, and the by-pass might also for example be united with the steam trap.

The operation of the new arrangement is as follows:

The filling and emptying pipes u fitted in the admission pipe Z and discharge pipe 0 in steam and hot waterheating plants are intended for filling and emptying the pipes and radiators with water during the cooling period, so that the steam or hot water again passes into the radiators. By means of the shutting off Valves p and 9 built in the pipes Z and 0 the cooling apparatus will not 1 be heated during the heating period. When the steam boiler 11 has been shut off from the piping by means of the valves 17 and q and 5 the connection established with the cooling plant is, the plant pipe conduits and radiators formerly serving for heating the rooms are filled with cooling liquid. This is kept in continual circulation during the cooling period by means of the circulating pump, the injectorm or the like, of which in the case of large plants preferably two m, m or more are connected up in the conduit, so that the cooled water or the like continually circulating in the radiators e reduces the temperature of the room during the hot months. This arrangement can be advantageously used for cooling railway carriages and the like.

0 I claim A central cooling plant including in combination with a pipe system and radiators for heating in winter and a heating boiler serving as central heating element for said 5 pipe system, said nlant comprising a refrigerator adapted to be connected up to sand pipe system, steam traps adapted to prevent steam from flowing through said pipe system, a by-pass bridging each of said steam traps, a shutting off valve in each of said bypasses and means for circulating cooling liqpgd through said pipe system and said radiars. In testimony whereof I aflix my signature.

EMIL JACOB.

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