Патент USA US2040906
код для вставки2,040,906 Patented May 19, 1936 UNITED STATES PATENT‘ OFFICE 2.040.006 . ansoar'non nsnmnna'non Glenn F. zellhoefer, Blnomington, 11!. 'No Drawing. Aml! may 3, 1935,’ Serlai No. 19,595 2 Claims. (Cl. 25H) The'present invention relates generally to a a and pressures, and both pressure and temperature. solvent material and a refrigerant mixture for determine the physical state of the free refriger absorption refrigerating machines, both of the‘ ant material, whether gaseous or liquid, and deter two-?uid type and of the three-?uid type. mine the solubility relations between the refrig In absorption refrigeration there is required a erant and the solvent material. It is, therefore, solvent material adapted to remain liquid very important that the solvent and the refrig throughout the operation of the apparatus, and a erant materials be physically adapted for use as refrigerant material adapted to have a liquid and individual materials in certain places andfor a vapor phase in the cycles of operation, adapted certain. functions, and that they be mutually 10 to be dissolved or absorbed in the solvent, adapt? adapted for certain functions when they are in ed to be evaporated or boiled as a vapor from the ' combination. vOther qualities not essential to solvent mixture and from the solvent, and adapt refrigeration, but pertinentto practical usage, ed to be condensed from the the vapor to a liquid. Numerous refrigerants and numerous solvents are 15 grown, as well as successful combinations of ese. The two-?uid absorption machines have certain mechanical parts which may be omitted or which are not duplicated in three-?uid machines. In a. 20 three-?uid machine, there is, in addition to the two-?uid mixture, a body of inert gas which is al ways gas, and which does not to any substantial extent dissolve in any of the components of the two-?uid composition, or in mixtures thereof. The present invention is directed to a new sol 25 vent for absorption refrigeration, and to combi nations thereof with refrigerant_s._;-, ' A particular object of the invention is the use of monomethyl ether of diethylene glycol acetate as 80 a solvent. control or limit the choice of solvent or refigerant, such as odor, viscosity, heat capacity, boiling point, freezing point, volatility, chemical stability, re- 1 activity, corrosive action, in?ammability, toxicity, etc. and suggested, I have been able to utilize mono methyl ether of diethylene glycol acetate w as a solvent for practical usage, in combination with the refrigerant dichloromono?uoromethane, which is little known. The new solvent is herein named as mono methyl ether of diethylene glycol acetate, ,but it may be characterized by others as methyl car bitol acetate. However, in order to leave no doubt as to its identity, its structural formula is herein given: 35 the new solvent material and the new combina tion may be used is disclosed in my co-pending ap plication Serial No. 651,306, ?led January 12, 1933, 25 ‘ CHJOCHzCHaOCHzCHaCOaCHa Another object is the use of a combination of said solvent with the refrigerant dichloromono?u oromethane. Examples of the two-?uid apparatus in which . By considering the limitations herein set vforth 80 The refrigerant herein specified is dichloro monoiluoromethane. In order to leave no doubt as to its identity, its structural formula is herein given: " 35 CHClzF In the accompanying claims, the invention is set or in my U. S. Patent No. 1,895,698, issued January forth as a combination useful‘ in absorption re 31, 1933. Other examples may readily be cited, frigeration. It is to be understood that a simple 40 and will be known to those skilled in the art. adulteration of the new solvent in its pure form, The two-?uid apparatus above referred to,brlef - either by reason of commercial impurities, or by 40 ly described, comprises a still in which a liquid addition of lesser quantities of other material, mixture of solvent and refrigerant is heated to dis useful also as solvent, is permitted, and such a till away as a vapor the refrigerant material, a composition is intended to fall within the scope of 45 condenser wherein said vapor is condensed to a the present invention. 45 liquid state, an evaporator wherein the resulting This application is dominated by the generic ap liquid is vaporized at reduced pressure to produce plication Serial No. 17,064, ?led April 18, 1935. refrigeration, and an absorber in which vapor of What I claim is: . the refrigerant material containing added heat l. A refrigerant mixture for the absorption type 50 units (acquired in the refrigerating process) is i of refrigeration apparatus consisting of mono again dissolved in the solvent material; Suitable heat exchanging and circulating means are in 50 methyl ether of diethylene glycol acetate as the essentially predominant solvent, and dichloro cluded, and automatic controls may be provided. ' monofluoromethane as a refrigerant. The particular characteristics of such a. ma- ‘ 2. A refrigerant mixture for the absorption type 55 chine are that the still operates at temperatures , of refrigeration apparatus consisting of mono 55 well above normal temperatures, such‘ for ex methyl ether of diethylene glycol acetate as the ample at 210° F. to 250° F.; and that the cooling. essentially predominant solvent, and a volatile unit operates at temperatures lower than normal, chemically stable halogenated hydrocarbon re such as from 15° F. to 50° F. Various parts of the frigerant soluble in said‘ solvent. . 60 apparatus differ in the prevailing temperatures GLENN F. ZEILHOEFER. 60
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