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Publication numberUS2496816 A
Publication typeGrant
Publication dateFeb 7, 1950
Filing dateDec 20, 1945
Priority dateDec 20, 1945
Publication numberUS 2496816 A, US 2496816A, US-A-2496816, US2496816 A, US2496816A
InventorsPeter Schlumbohm
Original AssigneePeter Schlumbohm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2496816 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Feb. 7, 1950 a 2,496,816

2 ,496,816 I t REFRIGERATION Peter Schlumbohm, New York, N. Y. Application December 20, 19l5rSerial No. 636,143

2 Claims. (01. 62-92) The present invention refers to refrigeration as in accordance with the instant invention the and more specifically to temperature control. opening of the valve H is as described above. The invention is illustrated in the accompany- In this invention such a valve H is applied in ing drawing, and is applied to the specific task a new manner. Instead of feeding liquid refrigof maintaining the temperature of a walled space erant into the evaporator it is used to blow of! constant at a predetermined level. refrigerant vapor which leaves the evaporator 3. The invention makes it possible to control the Instead of operating the valve by the difference storage temperature in portable, heat-insulated, between th temperature of the liquid refrigerso-called containers, as used for railway and ant 5 in'the evaporator and superheated'refrigtruck shipments of less than carload size. Such erant vapor e alvell is in this case actuated containers do not allow much dead weight for by the difference between the temp e of t e the insulation of refrigeration equipment. It has liquid refrigerant 5 and the temperature of the not been possible to equip them with the powerair in the storage space I. This difference is a driven complete condensing unit and evaporator. matter of those degrees which are required as TD Dry Ice, brine hold over tanks or eutectic ice have (TD is the standard expressi n f r T mp r ure been the only practical means for cooling such Difference) as general temperature difference less-than-carload containers. Each of these for practising heat exchange throu a Wall means has t di5advantage which in this case is the wall of the container 3. The invention allows a temperature control as However, a rather wide range can be effective for exact as the one perfected in complete condens- 2o actuating valve H with this TD, depending on the ing units; yet no powered condensing it i location of the bulb l5 within the storage space quired in connection with the invention. I and depending on the availability of stirrin In the accompanying drawings Fig. 1 illustrates ventilating means to move the air of the storage the apparatus installed in a walled space. Space to Obtain a uniform mp ature Fig. 2 shows a cross-section of a thermal exhroughout the storage p All these factors pansion valve which is wn of Fig 1, are routine refrigeration factors and need not be In Fig 1 the storage space is insulated by 3 described in detail. For the chosen TD the valve wall 2 of insulating material. A refrigerating can be Set by operating the set-screw which conevaporator 3 serves as storage vessel for a refrigtrols the tension of the spri l'l.

erant 5 and is arranged in the upper part of the one deciding point in this new invention is to storage room I, arranged on a stand 4 hi make the apparatus operative to the effect of vessel 3 is preferably an I. C. C. regulation shipmaintaining a predetermined room temperature ping container for compressed gases and is in the storage sp e I by l wi fi n w refri equipped with a hut fi valve 5 and an t t, t erant 5 if the room temperature rises above the receive a conduit 9 of standard refrigeration tubchosen p nt- Merely placing the apparatus into ing and fittings. The conduit 9 is equipped with the storage p e I and op nin the shut-off a gauge 1, with a blow-off conduit l0, controlled v lve 6 While shut-off valve 8 is d d would my a hand valve 8 and with a second blow-off be without consequences. Valve ll would be conduit l2, is controlled by the thermal valve closed by the spri the r fri rant 5 in II. This thermal valve II with its thermal bulb the p ator 3 and the liquid in bulb l5 hav- I5 and capillary connection 14 is shown in deing the Same temperature and Compensating tail and in vertical cross-section in Fig. their pressures. An important step of the instandard valve in which the vention, therefore, is to cool down the refrigerbulb l5 acts on the upperside of ant 5 to a temperature which is lower than l8, while the other side of the diathe pr r n d f t re room temperature phragm is subjected to the combined pressures which shall be maintained. To give an example, of the refrigerant in conduit l2 and a spring if the room temperature shall b maintained at H. If the pressure of the bulb is stronger than 20 F., and if conditions require a TD of 10 F, those combined two pressures, the valve stem [6 for the heat exchange, the refrigerant 5 must be from the valve seat S and refrigerprecooled down to 10 F. to make the apparatus ant can pass from conduit l2 into conduit l3. operative. Cooling down the entire mass of the Opening of the valve II is in standard evaporator refrigerant 5 may be effected by various known temperature control effected by exposing the ways: For instance, the container 3 may be rebulb l5 to the temperature of superheated refrigfrigerated by independent refrigeration means erant a or which leaves the evaporator, wherebefore or while being installed in the storage space Or, valve 6 and conduit 9 may be opened the air within said storage space to said liquid reto blow off refrigerant until the mass of the refrigerant, controlling the release of said refrigerfrigerant 5 is cooled down. A gauge 1, a branch ant vapor in response to the temperature differconduit I and a hand valve 8 may supplement ence between the temperature within said storage the equipment for this procedure. Or, the bulb space and the temperature of said colder body frigeration jobs, such as in trucks. While in of an evaporator adapted to maintain a room may be o d d w y a ona y ref e lo refrigerant contained in sa1d evaporator, means and on the road ref i erant 5 may be blown Off for precoolmg sa1d refrigerant below the predein the controlled mannei as described, to maintermmed tempeiature to be maintained later in tain the temperature. said storage space, means for alternately opening Since non-toxic refrigerants like Freon and-- said container to effect evaporation of refrigerant with precautions-carbon dioxide may be blown and closing said container to eifect cessation of off into the surrounding air, these refrigerants evaporation of refrigerant, said means being reare especially suitable for this new cooling sponsive to the temperature difference between system. the temperature of the storage space and the Having now described the nature ofmy inventemperature of the colder refrigerant contained tion and given an example of the manner in in said evaporator. v which it may be performed, PETER SCHLUMBOHM.

I claim as my invention:

1. The method of cooling the-air of a storage 2 REFERENCES CITED space by utilizing vaporizame refrigerant The following references are of record in the prising confining the vaporizable refrigerant,;preme 7 of this patent;

in its liquid phase to a temperature-below a pre- UNITED STATES PATENTS determined temperature corresponding to the Number Name Date mperature to be maintained in said storage 2 7 Bergert June 30' 1908 space, releasing refrigerant vapor above the liquid 5 7 Bobrick 2' 9 refrigerant to said storage space which refrig- 2,039,423 Ross 10' 1937 crant vapor is formed by the transfer of heat of 2316392 Irwin 20' 1943

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US892117 *Feb 21, 1906Jun 30, 1908Thomas Claude Xavier Alphonse BergetMeans for regulating the temperature in vehicles.
US966076 *Sep 20, 1905Aug 2, 1910Gabriel A BobrickRefrigerating apparatus.
US2089428 *Oct 12, 1933Aug 10, 1937Hunicke Clarence CConditioning air in railway cars
US2316792 *Sep 12, 1932Apr 20, 1943Standard Cap & Seal CorpRefrigerating system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2805554 *Feb 10, 1955Sep 10, 1957Schachtsiek ErwinArrangement for cooling transportable goods
US3092977 *Nov 17, 1959Jun 11, 1963Union Carbide CorpControl apparatus for low temperature refrigeration system
US3109296 *Sep 29, 1961Nov 5, 1963Chemetron CorpApparatus and method for refrigeration by carbon dioxide
US3125867 *Aug 23, 1961Mar 24, 1964 Refrigeration system connector apparatus
US3148515 *Nov 2, 1962Sep 15, 1964JentisInsulin preserving travel kit for diabetics
US3166913 *Jul 30, 1962Jan 26, 1965Elmwood Liquid Products IncMethod for refrigerating
US3293877 *Aug 13, 1964Dec 27, 1966Continental Oil CoRefrigerant flow control means
US3339374 *Apr 5, 1965Sep 5, 1967Aerojet General CoEvaporative non-mechanical heatsink refrigeration system
US3406533 *Feb 13, 1967Oct 22, 1968Cryo Cool CorpRefrigeration system including liquified gas tank
US3491547 *Dec 13, 1968Jan 27, 1970Cryo Cool CorpRefrigeration system employing liquefied gas
US3672181 *Feb 26, 1970Jun 27, 1972Tyree Lewis JrMethod and apparatus for carbon dioxide cooling
US3708995 *Mar 8, 1971Jan 9, 1973D BergCarbon dioxide food freezing method and apparatus
US3789616 *Jun 23, 1971Feb 5, 1974British Oxygen Co LtdEvaporation system
US3815377 *Jan 27, 1972Jun 11, 1974Tyree LSystem for cooling material using co{11 {11 snow
US3845635 *Oct 24, 1972Nov 5, 1974Union Carbide CorpPhase-separating spray header
US4129432 *May 4, 1977Dec 12, 1978Garwall Cooling LimitedExpendable refrigeration system
US4361013 *Mar 13, 1981Nov 30, 1982Skeele Robert CPortable refrigerator
US6517009Mar 30, 2001Feb 11, 2003Gotit Ltd.Automatic spray dispenser
US6540155Dec 18, 1998Apr 1, 2003Gotit Ltd.Automatic spray dispenser
U.S. Classification62/56, 62/223, 62/51.1, 62/190
International ClassificationF25D29/00
Cooperative ClassificationF25D29/001
European ClassificationF25D29/00B