US1193161A - Fornia - Google Patents

Description

G. l. LEONARD.

REFRIGEHATING APPARATUS.

APPLICATION FILED APR. I6. 1914.

Patented Aug. 1, 1916.

2 SHEETS-SHEETl Sii" .IN1/Wina G. I. LEONARD.

REFRIGERATING APPARATUS.

APPLICATION HLED APR.16.1914.

A 9 A @39 A A Patented Aug. A, 1916.

2 SHEETS-SHEET 2.

GEORGIE I. LEONARD, 0F LOS ANGELES, CALIFORNIA, ASSIGNOR TO LEONARD ROTARY PUMP CORPORATION, 0F LOS ANGELES, CALIFORNIA, A CORPORATION OF CALI- JFORNI.

REFRIGERATING APPARATUS.

Specification of Letters Patent.

Patented Aug.. 1, 1916.

Application led April 16, 1914:. Serial No. 832,367.

To all whom t may concern Be it known that I, GEORGE I. LEONARD, a. citizen of the United States, residing at Los Angeles, county of Los Angeles, and State of California, have invented a new and useful Refrigerating Apparatus, of

vwhich the following is a specification.

My presenttinvention rela-tes to an improvement in refrigerating apparatus of the type exemplified in Letters Patent of the United States No. 1,086,675, dated Febru ary 10, 1914:; and it relates more particularly to improvement of the machine of said' painsioin-chamber shown in Fig. l and Fig.

5 1s a View diagrammatically showing the whole apparatus.

The tank or casing .4 for containing the sealing and refrigerating liquids employed, and-which is represented as. being supported on a hase 22, is of thepreferred form shown and .is provided with a head fastened in place by screw-bolts and carrying a pressure-gage.

About an opening in one side of the tank, near its .lower end, is'formed an outwardly projecting Harige 25. 'The pump herein.

represented is of the kind shown and described in the aforesaid Letters Patent, in volving an `open case 5 containing intermeshing gears 7 mounted on shafts. 0n the outer end vof the pump-case 5 isformed a dahige 19, which is bolted to the face of the Harige 25 to support the pump stably in its operative position, wherein it seats in the 4tlange and projects horizontally through the,l tank-wall into the tank near its bottom. A

head 6 is bolted to and closes the inner end of the pump-case and adords bearing for the corresponding ends of the two gearshafts, one of which, denoted by the reference numeral 8, extends through a stungbox or gland 9 on the outer end of rthe case 5 and alines with and is coupled to the shaft of an electric motor 20 supported on the base 22, as shown in Fig. 1. A. suction or illustrated in Fig.

intake suction-line leads containing an upwardly opening check-valve 11; and a branch pipe 12 connects this line at a point below the check-valve therein with a pipe 18 leading from a valve expansion-chamber clearly i and the construction and operation of which are hereinafter described. A. valved pipe 13, for the pressureline, leads from the tank to this expansionchamber for carrying the refrigerant thereto. A refrigeratoncoil or chamber not shown) is to be interposed between the pipe containing the check-valve 11 and a pipe 17 leading from the expansion-chamber. As means for condensing the refrigerant in the tank, a coil 14: is shown depending therein from its head,'through which the coil-ends pass, with one of which, that denoted by the reference-numeral 21, connection may be made with a suitable water-supply for {iowingfcondensmg water through the coil.

he level of the sealing liquid in the tank 1s indicated at 23 and that of the refrigerant is indicated at- 24, in Fig. 1.

The manner thus described for combining the rotary pump with the tank greatly simplifies and cheapens the construction while stably supporting the pump in its operative position without other support for the purpose; and, besides, it facilitates assembling and Separation of the parts.

The valved exlpiansion-chamber involves a casing preferably formed in two parts, as shown, screwing together to clamp between them a diaphragm 1G having secured to its center a needle.-valve 15u. The needle-valve controls a minute orifice or port 15 in a valve-seat 15b in the inner end of a nipple 13", at which the pressure-pipe 13 is connected with the expansion-clulmber at the side of the diaphragm from which the pipe 17 of the suction-line extends. A. nipple 1S is provided on the )art of the casing at the opposite side of tie diaphragm, for connecting therewith the pipe 18, which is to be understood vas being connected with the branch-pipe 12, of which it is intended to be a. continuation.

In the operation of the apparatus, working of the motor 20 to act-nate the pump circulates the liquid refrigerant fro'in the tank through the circulating system, thus through the pressure line 13 into the expansion chamber, whence it passes by way of thel port is provided at 10, to which aA pipe 17 through the aforesaid refrigeratorcoil and enters, in expandedvor gaseous condition, by way of the pipe containing the upwardly-seating check-valve 11, past thel liquid in the tank to be cooled and liquefied` by the relatively loW temperature in the latter produced by the condenser 1-1. The liquefied' refrigerant rises'through and surmounts the sealing liquid ,'being of lesser gravity than -the latter.; though it may, obviously, beof a relatively heavy variety, causing it to sink beneath lthe sealing liquid to be taken thence into the pressure-line of the apparatus. lVhile the pump is thus operating, the suction it exerts on the line 1Q, 18 operates the diaphragm 16 towithdraw the needle-valve 15a andslightlyopen the port 15 for admission of the refrigerant from Ythe pressure line into the expansion-chamber. When the pump stops, the pressure inI the tank forces the sealing liquid through the pump and by way of the line 12, 18 into the chamber behind the diaphragm to exert pressure against the latter to close the needle-valve and stop circulation of the rerigera-nt; and wl1en 'the pump is again .n started, its suctionaction on the line 12, 18

withdraws this pressure and restores eulation. v

The valved expansion-chamber thus renders the apparatusk automatic in itsoperation', avoiding all necessity of turning on and off byhand, since the needle-valve is set to operate under a given amount of work to be performed. This is of importance, because if the valve did not close, the entire system of cooling-pipes would lill with the refrigerating liquid-and thusnthrow a heavy load on the, motor and pump in evaporating ott the large body of refrigerant before the regular the cirexpansion would takeplace under' the control ofthe needle-valve.

In order to effect-a better sealing action on the pump, l provide oney or more holes 26 (Fig. 2) through the pump-case at a suitable point between the intake and exhaust-ports to admit a small portion of. the sealing liquid from the pressure side.

Any suitable refrigerant may be used, for operating my improved apparatus, of a gravity so dill'ering from that of the sealing liquid. that it will rise above or sink below the latter. rl`hus rhigolene Works well as the refrigerant with glycerin as thesealing liquid; ammonia may be used as there- :trigerant with a .suitable oil for sealing; and

uf sulfur dioxid may be. used as the refrigerant with oil, but being heavier than the oil will sink beneath it and have to be taken into the pressure-line from below the oil-body.

What I claim as new and desire to secure by Letters Patent is 1. In a refrigerating apparatus employing an expansible fluid refrigerant, the combination of a tank having a pressure-outlet and a side-opening provided with an outer flange forming a pump-seat, a rotary motordriven pump having a flange. on the outer end of its case and seating in said tankflange to extend said case horizontally into the tank with the case-flange abutting against and secured to the tank-flange face, said pump having an outlet within the tank and an intake, and a circulating system tor the refrigerant connecting said pressure-outlet with the pump-intake.

Q. In a refrigerating apparatus employing an expansible fluid'refrgerant, the com= bination of al tank having a pressure-outlet and a side-opening provided with an outer flange forming a pump-seat, a rotary motordriven pump, having a flange on the outer end of its case and seating in said tankflange to extend said case horizontallv into the tank with the case-flange abutting against and secured to the tai'ik-{lange face, said pump having an outlet within the tank and an intake, a head secured to the inner end of the pump-case and forming bearings for shafts of the rotary-pump members, and a circulating system for the refrigerant connecting said pressure-outlet with the pumpintake.

3. In a refrigerating apparatus employing an expansible fluid refrigerant and a sealing liquid. the combination of a tank for containing said refrigerant and liquid and having a pressure-outlet, a rotary motordriven pump in the tank and having its outlet therein and an intake, a pressure-line leading from said pressure-outlet., a valveseat at the discharge-end of said line containing a minute orifice, a casing containing a. chamber connected with said dischargeend, a diaphragm in said easing dividing it into chambers and carrying a needle-valve for controlling said orilice, a suction-line leading to the pump-intake from the chamber at one side of the diaphragm and containing a check-valve, and a branch suctionline connecting said suction-line between the check-valve and the pump with the chamber at the opposite side of the diaphragnn.

GEORGE l. LEONARD. Witnesses:

Dnssa WiLLrAMs, E. M. Hamvoon.

Images