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Nov. 15, 1938. B. Stelzer 2,136,527 REFRIGERATING and AIR CONDITIONING SYSTEM in CONJUNCTION with INTERNAL COMBUSTION ENGINES Filed Dec

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Nov. 15, 1938. B. Stelzer 2,136,527 REFRIGERATING and AIR CONDITIONING SYSTEM in CONJUNCTION with INTERNAL COMBUSTION ENGINES Filed Dec Nov. 15, 1938. B. stelzer 2,136,527 REFRIGERATING AND AIR CONDITIONING SYSTEM IN CONJUNCTION WITH INTERNAL COMBUSTION ENGINES Filed Dec. 2, l935 2 Sheets-Sheet Sai3S2XSXS 3. al rNR Nis NSSSSSSSSSSSl N 2 SNSSA S:--- Rese : C INVENTOR. Nov. 15, 1938. B, STELZER 2,136,527. REFRIGERATING AND AIR CONDITIONING SYSTEM IN CONJUNCTION WITH INTERNAL COMBUSTION ENGINES Filed Dec. 21, 1935 2 Sheets-Sheet 2 . 22 K N Ss 2Mr. S. f s 2. S Z24, 1 ZSC) sa SS2egg z1 f 2z z2 Z A2a. 5 A2. 6 INVENTOR. Patented Nov. 15, 1938 2,136,527 UNITED STATES PATENT OFFICE 2,136,527 REFRIGERATING AND AIR-CoNDITIONING SYSTEM N CONJUNCTION WT N TERNAL COM BUSTON ENGINES Berteli Stelzer, South Bend, n.d. Application December 21, 1935, serial No. 55,625. 13 Claims. (C. 62-169) The invention relates to a refrigerating and air through the housing being taken on line b-b; conditioning system utilizing the manifold vac Fig. 7, a diagram illustrating the principle of uum of an internal combustion engine to help Said pump; evaporate Water and fuel to produce a cooling ef Fig. 8, a modified pump used as shock-ab- . fect, and where the vapors formed are fed into SOrber. the engine, Referring now to Fig. 1, there is shown a reser he object is to provide partial cooling eco voir to contain water under atmospheric pres hornically by inexpensive equipment and at the sure, Below is a float chamber or generator 2. Sarine time to improve engine performance by feed Containing water held at a fixed height by means 10 0 ing water vapor into the intake manifold to per of float valve 3 consisting of a float and a needle mit a lean fuel setting without the danger of 4 sliding in a bearing 5 carrying a wick 6 and ad Overheating. mitting water from the reservoir to chamber 2 Another object is to provide a vacuum pump through orifices and ' when the water level in the latter has fallen. A suction pipe 8 forming Which itself has considerable novelty whose dis 15 3 charge side is connected to the intake manifold coils 8 and passing through the water reservoir of the engine, thus producing a very high vacuum. leads to a vacuum pump 9 shown in detail in A further object is to admit air into the vacuum . Figs. 2 and 3. However, any type of vacuum line when the vacuum in the manifold drops, pump may be used, especially those of the tur whereby the air passing through a venturi, atom bo-compressor type. A pipe line 0 having a izing water, carries away vapors formed by sur check valve interposed leads from said pump 20 face evaporation. This feature is of importance to the intake manifold 2 of the engine. A bypass because it tends to keep refrigeration constant 3 with a check valve 4 allows direct flow of regardless of engine speed. steam from line 8 to the manifold should the suc The invention also aims at using the cooling tion in line to be greater than in line 8. Another obtained from evaporation of the engine fuel, and line 5 communicating with the suction line 8 25 to provide a device using ordinary gasoline con leads to a diaphragm housing 6 to operate a sisting of fuels of different volatility by forcibly diaphragm carrying a needle 8 adapted to feeding a measured amount of fuel to the carbure Seat against the opening of a venturi 9 forming tor or "mixer," the lighter parts in gaseous form, Communication between the atmospheric passage the heavier as a liquid. 20 and vacuum chamber. 2. A spring 2 tends 30 Since almost an absolute vacuum is required to hold the venturi open, and is overcome when to cool water vapor to 32 degrees Fahrenheit, the suction in the manifold has increased. A and .0125 at to reach 50 degrees Fahrenheit, it is . Small passage 22 leads from the narrowest part not the aim t reach the freezing point, but to of the venturi below the water level, so that when Work near the latter temperature. For air-con air is admitted through 9 water is sucked up and ditioning, drinking water and keeping food fresh atomized. To drain condensed water back to the Such a temperature is satisfactory. generator, I provide a sump 23 to receive con Lower temperatures, however, may be reached densed water from lines to and 3, an orifice. 24 by the evaporation of the fuel, depending on its held open by the extended needle 8 when the volatility. Thus if little refrigeratory is required, venturi 9 is closed communicates with a reservoir 40 and the refrigerating device is well insulated from 25 from which leads the atmospheric line 20. A heat, the evaporation of the lightest parts of the valve 26 held open with venturi 9 admits air fuel may maintain a temperature considerably into said reservoir through an air-cleaner 27. lower than that of the water. I shall now describe the construction used to Other advantages will appear on the accom evaporate the fuel and the method of feeding it 45 panying drawings wherein: in its new form to the carburetor. To convey the Fig. is a diagram of a system embodying the fuel from the fuel tank (not shown) to which invention; leads a fuel pipe 28 I use a metering pump 29 of Fig. 2, a diagrammatic view of the improved the diaphragm type having a diaphragm 30 held vacuum pump with the cover removed; against an eccentric 3 by a spring 32. Check 50 Fig. 3, a section taken on line a-d; valves 33, 36 are placed in the suction line 28 and Fig. 4, a modification of said vacuum pump; discharge line 3, respectively. The eccentric 3 Fig. 5, a view of a modified form of vacuum is spined to a shaft 36 driven in any manner by pinp: the engine. Rotation causes Oscillation of said Fig, 6, a sectional view thereof the section diaphragm, the magnitude of which may be 2 2,136,527 varied by shifting said eccentric by a bell crank the flow of a fluid outwardly than they do in 3 pivoted at 38 and being operated by the op Wardly. This is well-known to those versed in the erator by means of the accelerator rod 39 lead art as the loss due to changing pressure into ing to the accelerator pedal 40. Another rod 4 Velocity is very small, where as, vice versa, it is attached to the bell crank by means of a pick-up considerable. The angle of the taper should not arrangement consisting of a spring 42 and an ad exceed 10 degrees as otherwise the widening hole justable collar 43 and 44, is connected to the Would give no benefit in changing velocity into throttle lever 45 carrying the throttle 46 of the pressure when the fluid flows inwardly. To fur Carburetor 47. A damper 48 of any conventional ther decrease the resistance to the flow from the O design retards the action of said throttle. outer chamber to the inner chamber 8 and to 10 The fuel discharged into the line 35 which has increase it from the inner chamber to the outer, an air dome 49 is sucked through an orifice or I increase the clearance between impeller and nozzle 50 into a chamber 5 to atomize, and pump housing at 89 towards the inside or pump through a coil 52 by the suction of a pump 53 chamber 87. This has the same effect as the holes which then delivers the fuel partly in vapor, 88, and is very cheap in construction. Thus the partly in liquid form to the carburetor by means holes 88 may be obviated by this tapering clear of pipes 54 and 55. While the vapors will pass ance, except where a pump is constructed very through the former, the latter will carry the wide. The inner chamber 8 connects through a liquid fuel to be atomized in a small venturi 56. tube 90, serving as vapor discharge, with a reser A Syphon 57 serves to store a reserve, which helps voir 9. A hole 92 maintains a certain oil level in starting the engine. 93 in chamber 87 while the pump is running. The The refrigerator enclosure 58 consists of a vapors are allowed to escape into the discharge porous insulating material with an air-tight skin pipe O. Considering the pump in operation, and around it. A vacuum line 59 leads thereto So the oil circulating, then at 93 the oil begins to that the enclosure is evacuated, thus improving break away from the impeller, forming a vacuum. the insulation. A compartment 60 serves for Stor At the same time oil flows through the hole 88 ing food. Another compartment 6 serves as an by the latent pressure in chamber 87. But as the air convector for air-conditioning. The air to be resistance in this direction is great, the flow is cooled is forced through the air cleaner 62 past very small. As soon as the cell registers with the 30 the cool coils by an induced draft fan 63 driven intake or suction port 84 vapor from the line 9 is 30 by an electric motor 64. The waste water from admitted to the cell. When the latter starts to the faucet or drinking, fountain 65 drips into the decrease again, those Vapors are compressed until sump 66 which serves to further clean and cool they are allowed to escape through the exhaust the passing air.
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