Patented June 23, 1931
Application Filed February 20, 1930. Serial No. 429,981.
My invention relates to certain improvements in the device shown and described in the D. F. Keith Patent No. 1,740,737, dated December 24,1929, which shows and describes a refrigeration unit requiring removal from the cabinet in which same is used, for purposes of regenerating the absorption cycle of operations thereof.
The object of my invention is to increase the dehydration effect in the operation of the device during the generation step and at the same time to further add to the absorption ratio in the system.
In the Keith construction of the above noted patent, the "hot ball" or generator absorber is provided on its upper end with a dome, separated from the ball itself and adapted to contain water, which cools the outlet from the dome and thus helps in dehydration. Baffling is also provided for in the passage just above the entrance to the evaporator-condenser elements, which is intended to facilitate precipitation of moisture from the generated gases.
In both instances my invention contemplates the full communication to the remainder of a mass of absorbent liquid or other absorbent, which absorbent takes up and discharges vapor during the operation of the device instead of using the inert mass of waiter in the dome and the baffling in the condenser end of the system.
It is also my object to insure a proper distribution of the absorbent if it be a liquid at all times, by providing for a dam plate in the connecting tube of the Keith device which, upon draining of the same prior to regeneration, will assure that the absorbent liquid will flow to the proper place upon shifting of the device back to normal position.
I accomplish my objects by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and in which I show and describe the method best known of accomplishing my objects, the novelty therein to be set forth in the appended claims.
In the drawing the figure is a section of a refrigeration unit built according to my invention.
I have shown a structure having a generator absorber shell in the form of a sheet metal ball 1, to which is mounted vertically tubular conductor passages 2. This ball is connected to a tube 3, through the agency of a dome shaped metal piece 4. The tube 3 has a portion 5 which serves as a hanger for the device when in use, to which portion a handle 6 may be secured. The tube thence extends at right angles as at 7 to form a sump 8, with the evaporator condenser shell 9 also of ball like shape, secured half way down the arm 7 of the tube.
A pipe 10 is set into the top of the ball 1, forming the absorption passage, this pipe extending down below the liquid level of the absorbent 11 in the ball 1. This pipe also extends up into the tube portion 3 and establishes the level of a liquid seal in this portion of the tube. A tuba 12 is secured by soldering to the top of the ball 1 within the space surrounded by the dome 4, this tube extending to the upper level of the pipe 10. The tube extends below the absorbent level within the shell in order to promote absorption within the shell.
A small liquid retaining chamber 13 is located in the tube portion 3 having a pipe 14 extending from the top thereof to the top of the bail 1. This pipe serves as the conduit for gases evolved from the ball 1 during the generation step.
The dome 4 opens directly into the tube portion 3, and a pipe 15 extends down from the chamber 13 to a point below the seal level established by the tube 10.
Referring now to the operation of the generator absorber as so far described, starting with the ball 1 filled up to the level of the material 11 which may be a normally solid substance which becomes liquid when at all charged with refrigerant gas or a normally liquid substance, and with the dome and lower end of the tube portion S also filled with the absorbent up to the liquid seal level 16, the ball 1 is subjected to heat, while the other portions of the device are subjected to a cooling liquid.
The heat causes gases to be evolved from the liquid in the ball and also from the liquid within the dome. The cooling effect of the liquid in the dome, due to heat units absorbed in the evaporation of the refrigerant element from the absorbent liquid, will act to cool the outgoing gases from the ball, and to thus dehydrate these gases. The refrigerant passes out through the pipe 14, down through the pipe 15 whence it bubbles up through the liquid in the dome and in the seal at the lower end of the tube portion 3.
The liquid in the dome is kept rich in refrigerant, which is also driven off from the liquid by the heat, thus keeping down the temperature in the liquid of the seal and about the top of the dome and around the pipe 10.
At the close of the heating step substantially all of the refrigerant gas will have been evolved from the ball, the dome and the seal and pressure will have been built up in the rest of the system.
Referring now to the remainder of the structure, I have located in the portion 7 of the tube a dehydrator in the place of the baffling used by Keith. To accomplish this a simple construction as illustrated, is to place a partition 20 across the tube portion 1 closely above the port to the evaporator condenser, and extend a pipe 21 up through this partition, the pipe being preferably baffled at the top by a lip 22. Also secured to the pipe 21 is a small pipe 23 which extends down to a point near the level of the partition plate.
During the condensing action of the device which takes place, during the generation step of heating the ball 1, the ball 9 and the tube portion 7 are plunged into a vessel of water.
This water cools the tube portion 7 as well as cooling the ball 9, and the result is to cause the gases which circulate about above the partition in their endeavor to pass down to the condenser ball through the pipe 21, to dischargee most of their water content which settles in the chamber formed in the tube portion 7 by means of the partition 20. This water acts further to cool the gases passing down through the pipe 21, with the result of precipitating retained moisture to fall into the sump at the end of the tube
During the evaporation cycle the liquid in the tube portion 7, lying above the partition 20, will absorb refrigerant which passes down below its level through the pipe 23.
The drainage of the device, which is accomplish by inverting it to a position of resting on the ball 1 and the shoe 24 at the end of the handle structure, is to drain away all contained liquid in the evaporator, sump and well above the partition 20.
There is located at the evaporator end of the portion 5 of the tube a dam plate 30. The liquid passes beyond this plate in the drainage position, and when the device is righted again to the position shown in the drawing, the dam plate will prevent liquid -from flowing back into the sump and the well, so that all of the absorbent will flow into the ball 1, and the dome and liquid seal portion of the tube part 3.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:-
1. In an absorption system refrigeration unit the combination with a generator absorber shell, a condenser evaporator shell and tubular means connecting the same, the generator absorber shell being loose from the tubular means except for defined passageways, of a shell erected about the generator absorber shell, said shell communicating with the tubular means and arranged to retain a portion of the absorbent agent used in the system, and a conduit extending from the tubular means to a point below the absorbent level within said erected shell in order to promote absorption within the same.
2. In an absorption system refrigeration unit the combination of a condenser evaporator shell, with a tubular passageway leading thereto and constituting the conduit for passage of generated gases to the said shell, and means within the tubular passageway located so as to be subjected to the same cooling liquid as that in which the condenser evaporator shell is submerged during the generation step in the cycle of use of said unit, said means retaining a body of absorbent liquid and defining a passageway surrounded by the same.
3. In an absorption system refrigeration unit the combination of a condenser evaporator shell, with a tubular passageway leading thereto and constituting the conduit for passage of generated gases to the said shell, and means within the tubular passageway located so as to be subjected to the same cooling liquid as that in which the condenser evaporator shell is submerged during the generation step in the cycle of use of said unit, said means retaining a body of absorbent liquid and defining a passageway surrounded by the same, and comprising a partition across the tubular passageway, and a pipe extending from above to below the partition.
4. In an absorption system refrigeration unit the combination of a condenser evaporator shell, with a tubular passageway leading thereto and constituting the conduit for passage of generated gases to the said shell, and means within the tubular passageway located so as to be subjected to the same cooling liquid as that in which the condenser evaporator shell is submerged during the generation step in the cycle of use of said unit said means retaining a body of absorbent liquid and defining a passageway surounded by the same, and comprising a partition across the tubular passageway, and a pipe extending from above to below the partition, said tubular passageway serving also as the conduit for evaporated gases, and a pipe extending from above to a point adjacent the partition to promote absorption of refrigerant gas by the liquid trapped thereby.
RUSSELL T. SMITH.