US1703163A - Cooling system - Google Patents

Description

W. W. MUIR COOLING SYSTEM Feb. 26, 1929.

Original Filed Nov. 28

@num/1to1,

@Hoz umg Patented Feb. 26, 1929.

UNITED ,STATES PATENT oFFicF..

WELLINGTON W. IUIR, 0F LOCKPORT, NEW YORK, ASSIGNOR TO HARRISON RADIATOR CORPORATION, OF LOCXPOBT, NEW YORK.

` COOLING SYSTEM'.

Original application led November 28, 1921, Serial No. 518,879. Divided and this application med November 22, 1926. Serial No. 150,036.

This application is a division of my prior copending application Serial N o. 518,379, filed November 28, 1921.

The invention relates to a cooling system for internal combustion engines of the type wherein a fluid is employed, or more p articularly the type in which the generation of steam and vapor and its condensation is employed in the cooling system..

The object of the present invention 1s the provision of means by which the steam generated in part of the cooling system 1s utilized for returning the condensed fluid to the system.

A still further object is to provide an arrangement by which the cooling system may be operated at superatmospheric pressure.

Other objects and advantages of the in-l vention will be apparent from the description thereof.

Referring to the accompanying drawings forming a part thereof:

Figure 1 is a vertical sectional view, more or less diagrammatic, of one embodiment of lthe present invention, parts being in elevation and parts broken away;

Fi ure 2 is a vertical section through the auxiliary tank appearing at the top of Fig. 1.

Referring now more particularly to the drawings, the reference numeral 1 indicates an internal combustion engine having the water jacket 2 associated therewith, as is usual in such constructions. The water jacket 2 is supplied with` water or other cooling fluid from the chamber or header 3 through the passage 4 which connects the header 3 with the lower portion of the water* jacket 2, the return of the water taking place through a conduit or passaoe 5. As shown, the overflow opening of t e assage 5y is above the level 6 of the liquid in the upper chamber, but .the lconstruction may be otherwise.

In order to prevent the local formation of steam in undesirable or dangerous quantities in the jacket 2 of the engine, it is desirable though not absolutely necessaryto provide power-operated means for circulating the cooling fluid therethrough. Any suitable mechanism may be employed for this purpose. As shown on the draw-ings, a pump 7 located in the passage 4, is employed for this purpose and operated from the shaft 7 of the fan 7.

The chamber 3, passage 4, the water jacket 2 and the passage 5 constitute what may be considered the main circulatory system. When the free end of the pipe 5 is arranged to extend above the level of the liquid in the header 3 as shown in the drawin the main 'circulatory system may be consi ered as being a non-continuous or an interrupted one and as a result of this construction, whether or not a pump be employed, there will be no circulation of the cooling fluid while the engine is at rest, consequently it will take a relatively long time to cool the water within the jacket and the engine will remain warm for a comparatively long period after it stops running.

Associated with the chamber 3 is a radiator, or radiator core or condenser 10 of any suitable construction. This radiator may be located at any convenient point relative to the engine. As shown, it occupies the usual position in front of the engine.

It isr desirable that the radiator be so arranged that no liquid circulates through it. Any suitable arrangement of mechanism may be employed for this purpose.l One form of mechanism for accom lishing this without the use of valves is s own on the drawing wherein the passage 11 leading into the radiator has its upper end extending above the level of the liquid system. The lower end of the pipe 11 may be attached at any convenient point to the radiator, as at one end thereof. As shown, it is attached to the upper end of the radiator. This arrangement permits only vapor or steam to enter the radiator core. Moreover, this arrangement not only permits the engine to auxiliary tank or chamber14 is mounted adjacent the chamber 3 and is connected to the header 12 by means of a pipe or passage 13. This chamber 14 may be of any suitable construction. As shown, this chamber is formed of two cup- shaped stampings 20 and 21 joined together and to the chamber- 3 by the fianges 22 in any suitable way.

The upper portion of the chamber 14 is provided with a valve support and guide 23 secured in the top of t e chamber. As shown, this support is provided with an aperture or vent 24 in communication with the atmosphere. The valve support may, if desired, be provided with a lateral extension 24' having an aperture therein in communication .with the aperture or vent 24. By this arrangement the aperture or vent opens laterally into the air and dirt and dust is not quite so likely to enter and stop up the same. This extension may, of' course, be omitted if desired.

The lower portion of the chamber has an outlet passage 25, with a dump valve 26 preferably located above the level 6 of the liquid and also preferably of the normally closed type. The valve 26 may be provided with suitable means, such as the counterweight 26 for normally seating the valve. Mounted within the chamber 14, as by means of the brackets 26, is a float chamber 27 open at the top and provided near its bottom with an opening or openings 28; and suspended in the float chamber in any suitable manner is a relatively large float, the construction of which may be varied widely. In the form shown, it comprises the cylindrical body 30 and the heads 31 soldered or otherwise connected thereto.

The chamber 14l is provided with a vent passage which may open into the chamber or header 3. As indicated in Figures 1 and 2, a passage or conduit 32 has one end secured in the Wall of the header or chamber and its other end extending into the chamber 14 is secured in the valve support in communication with the aperture 32. In the form shown, the apertures 24 and 32 are in vertical alignment and are adapted to be alternately opened and closed by a double valve 35, but here again the construction may be varied, that shown being preferred largely because of its low cost. The valve is operated from the iioat in any suitable manner. As shown, the valve has an elongated slot 37 for receiving the bail 36, which extends through the slot 45 of the valve guide 23.

The pipe or passage 11, radiator core 10, the lower radiator chamber or header 12,

ber 14 constitutes what might be termed the auxiliary circulatory system. The main circulatory system and the auxiliary system ,may be together considered as constituting ,pipe or passage 13, and the auxiliary cham- 1n the main circulatory system becomes Y hea-ted well. toward the boiling point-in other words, the engine on starting is brought quickly to a temperature which gives efficient operation. Thereafter, the vapor and steam escaping into the chamber 3 finds its way through the passage 11 into the passages of' the core 10 where it is quickly condensed. Under these conditions the dump valve 26 is closed and there is little or no liquid in the auxiliary tank or chamber 14, therefore the float is at its lower limit of movement and the chamber 14 is in communication with the atmosphere through the vent or aperture 24, thus permitting the escape of air entrapped in the systemor given up by the liquid when it is hea-ted. The condensed Huid soon seals the lower end of the pipe or passage 13 and then when the pressure of the steam in the radiator becomes sufiicient it will force the condensed fluid in the header 12 through the passage 13 into the space surrounding the float chamber 27 which it finally overtops, but before this latter takes place, a sufiicient quantity of liquid will have entered ,the float chamber through the openings 28 to largely overcome the' displacement of the Hoat from which it follows that when the liquid overflows the upper edge of the valve chamber it will cause the float to rise rapidly to efl'ect a very prompt and positiveJ shifting of the valve. The shifting of the valve 35 will close the vent 24 and open the passage 32 and the pressure in the auxiliary chamber 14 and the chamber or header 3 becoming equalized the liquid in the passage or pipe 13 will cease to flow into the auxiliary chamber 14 and the liquid therein will be discharged through the outlet passage 25 into the header 3. This operation will be repeated indefinitely in accordance with the vrate of steam formation. f

The foregoing arrangement therefore provides a system by which steam pressure generated in one part of the system is utilized to transfer condensed liquid from one part of the system to another. Also the arrangement provides a system which operates at superatmospheric pressure as the pressure of the steam in the chamber 3 must exceed that of the atmosphere in order that the liquid may be forced from the header 12 into the chamber 14.

The invention is not limited to the particular details y disclosed, as numerous changes may obviously be made without departing from the scope of the invention as defined in the appended claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. In a device of the class described, a liquid circulatory system including an engine jacket, a condenser system, and means whereby the pressure of steam generated in the circulatory system is utilized to return the condensed fluid from the condenser system to the liquid circulatory system.

2. In an internal combustion engine, a circulatory cooling system associated With said englne, a condensing system, and means for utilizing the pressure of the steam generated in said first named system for returning the condensed fluid in said condensing system to said first named system.

3. In an internal combustionengine having a jacket for a cooling fluid, a cooling system associated with said engme, said system including a radiator for condensing the steam generated in said system, and means for utilizing the steam generated in said system, for moving the condensed fluid from one portion of said system to another.

4. In a device of the class described, a liquid circulatory system, a condenser system, and means whereby steam at superatmospheric pressure generated in the circulatory system is utilized to return the condensed fluid from the condenser system to the liquid circulatory system. p

5. In an internal combustion engine, a circulatory cooling system associated with said engine, a condensing system, an auxiliary tank associated with said coolmg system, means for utilizing the steam generated in said iirst named system for moving the condensed fiuid from said condensing system to said auxiliary tank, and means for returning the fiuid from said tank to said cooling system.

6. In an internal combustion engine, a circulatory cooling system associated with said-engine, a liquid and steam chamber at from said condensing system to said auxiliary tank, and means for returning the li uid from said tank to said chamber.

In an internalcombustion engine, a circulatory cooling system associated with vsaid engine, a condensing system having a collectinlT chamber for receiving the condensed uid, said systems being closed, whereby t e pressure of the steam therein is exerted upon the liquid in said collecting chamber, an auxiliary tank associated with said cooling system, a conduit for conducting liquid from said collecting chamber to said tank, and means for returning the liquid from saidv tank to said cooling system.

8. In an internal combustion engine, a circulatory cooling system associated therewith, a condensing system, an auxiliary tank normally open to the atmosphere, means for utilizing the steam generated in said circulatory system to move the condensed liquid from said condensing system to sa'd tank, and means for returning the liquld from said tank to said circulatory system.

9. In an internal combustlon engine, a circulatory cooling system therefor having a liquid and steam chamber at its upper portion, a condensing system having a conduit extending into the vapor space of said chamber, whereby steam may pass from said chamber into saidcondensing system', a collecting chamber for receiving the condensed liquid, said systems being closed, whereby steam generated in said cooling system will exert pressure upon the liquid in said collecting chamber, and means for conducting the liquid from said last named chamber and eturning it to said liquid and steam chamer.l

10. In combination with an internal combustion engine, a circulatory cooling system therefor having a liquid and steam chamber at its upper portion, a condensing system having a ipe extending into the vapor space of said c amber, whereby steam may pass from said chamber into said condensing system, a collectino' chamber for receiving the condensed liqui an auxiliary tank associated with said first named chamber, a fioat in said auxiliary tank, a conduit extending from the interior of said auxiliary tank to the open air, a conduit extending from said auxiliary tank into said first named chamber, valves controlled by said fioatfor alternately opening and closing said conduits, said cooling system being closed, whereby steam generated therein will exert pressure upon 10 liquid, said systems being closed, whereby the pressure of the steam therein is exerted s annales' 11561; the liquid 'in U said collecting chamber, an auxiliary tank associated with said cooling system, a conduit fiori' conducting liquid yfrom 'said collecting chamber to said tank, a ioat in said auxiliary -tank, means controlled by said iloatA for' causing the liquid collected in said auxiliary tank to be returned to said cooling systell.

Intestimony whereof I hereunto aix myV signature.

WELLINGTON W. Mum.

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