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Патент USA US2105545

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Patented Jan. 18, 1938
- 12,105,545
2,105,545
SAFETY APPLIANCE non STEAM .m'r ‘ne
FBIGERATION APPARATUS
Hartley R. McBath, Jr., Montclair, N. J., assignor
to Worthington
p and Machinery Corpo
ration, New York, N. E, a corporation of Vir
L, 1 1|! 1
Application .liune 19, 1934, Serial No. 731,389
6 01.
(m. 62-152)
This invention relates to steam jet rei‘rigera
voir It. The reservoir H has a predetermined
'
'
tion apparatus and an object oi’lthe present in- . quantity of liquid such as water or the like there
vention is to provide a. safety device associated
with the ?ash tank of such installations which
5 will bleed pressure from the ?ash tank »if the
pressure therein reaches a stage bordering on
danger or goes above a predetermined degree.
in and, as clearly shown in the drawing, the
pipe Ill projects below the liquid level in the
reservoir. An over?ow pipe I2 is connected
to the reservoir above the normal liquid level
therein and may be connected to a sewer or to
In steam jet refrigeration apparatus the evap
any other suitable outlet.
When the ?ash tank or evaporator l, is not
in operation, there will be no water or liquid 10
in of excessive pressure sumcient to burst the ‘ in the down-pipe ID, as any liquid therein will
orator or ?ash tank, due to the method of oper
m stion, may be subjected to the building up there
15
tank should its companion mechanism, especial—
ly the automatically operated control valves, fail
pass into the reservoir 1 I. Of course the lower
end of the down-pipe will have water or other
to function properly.
liquid therein to a height equal to the depth of
insertion of the pipe Hi into the liquid in the
reservoir. As soon as the steam jet refrigerat
ing apparatus is placed in operation the vacuum
maintained in the ?ash tank I will lift water
or liquid from the reservoir ll upwardly in the
pipe It, until the liquid reaches a height in the 20
down-pipe equal to the pressure expressed in
feet of liquid between the absolute pressure car
ried in the ?ash tank, and the absolute pressure
in the reservoir H, which in most cases is atmos
pheric pressure.
Should the pressure rise in the ?ash tank, such
increasing pressure acting on the liquid column
in ‘the pipe Ill, will force the liquid downwardly
and into the reservoir ii. If the pressure in the
tank i becomes so great as to be dangerous. 30
such pressure, acting through the pipe It will
force the liquid in the reservoir Ii upwardly and
out through the over?ow pipe 12 providing a
bleed-0E for the pressure from the evaporator
or ?ash tank l, and preventing any liability of 85
bursting of such tank.
7
The present invention comprehends the provi
sion of safety means to prevent bursting of the
?ash tank, which safety means is in itself free
from any automatically operating mechanisms.
relying on a column of water or other liquid to
20 control the bleeding of excessive pressure from
" the ?ash tank. The liquid is equal in feet of
liquid to the di?erence between the absolute
pressure in the ?ash tank and the absolute pres
sure at the end of the column remote from the
' 25 '
tank expressed in feet of liquid which pro
vides control of the bleeding of excessive pres
sure from the ?ash tank.
With these and other objects in view as may
appear from the accompanying speci?cation, the
so invention consists of various features of con
struction and combination of parts, which will
be ?rst described in connection with the accom
P?nying drawing which shows 2.
=4 =.--
atic
layout of a steam jet refrigerating apparatus
35 having the improved safety appliance attached
thereto, and the features forming the invention
will be speci?cally pointed out in the claims.
-
Referring more particularly to the drawing,
the steam jet refrigerating apparatus illus
49 trated may be of any conventional type or layout
embodying an evaporator or ?ash tank of any
approved type in which is maintained a prede
termined level of water or other liquid as in
dicated by the dotted line 2. The apparatus in
45 eludes the primary condenser 3 which is connect
ed to the ?ash tank 6 by the primary ejector it
and to the inter- and after-cooler 5 by the sec
ondary ejectors 6 and l. The chilled water is
pumped from the evaporator or ?ash tank l
m by the chilled water pump 8 and is delivered
through the discharge pipe t to any suitable type
of cooling system.
_
A pipe it opens into the ?ash tank or evapo
\ rater i above the water level therein and the
55 lower end of the pipe It opens out into a reser
If it is so desired a liquid or make-up water
supply line as indicated at It may be provided
for re?lling the reservoir it.
It will be understood that the invention is 40
not to be limited to the speci?c construction
or‘ arrangement of parts shown but that they
may be widely modi?ed within the invention de
?ned by the claims.
What is claimed is:
1. In a steam jet refrigeration system, the
combination with a ?ash tank having a normal
water level therein, of a safety bleed-oil pipe
connected to said tank above the normal water
level in the tank, a reservoir, said pipe opening 50
into said reservoir, said reservoir having a‘quan
tity of liquid therein to build up a back pres
sure in said pipe.
2. In a steam jet refrigeration system, the
combination with a ?ash tank having a normal 55
2
, aromas
water level therein, of a safety mead-or ‘pipe con
solute pressure in the ?ash tank and the abso
lute pressure in the reservoir, whereby when said
absolute pressure di?'erence is reversed pressure
said reservoir, saidreservoir having a quantity ' will bleed from said ?ash tank to said reservoir,
oi liquid therein to build. up a back preasurein: and an over?ow connected to said reservoir above
said pipe, and an over?ow pipe connected vto the normal liquid level therein.
'5. In a saiety appliance ior steam jet. reirig
said reservoir above .the normal liquid level
nected to said tank above the normal, water level
in the tank, a reservoir. said pipecpening into
' eration systems including a ?ash tank, a safety
3. In a steam jet refrigeration system, the ' bleed-oil’ pipe connected to said tank above the "
10 combination with a ?ash tank having a normal normal water level therein, a reservoir, said pipe 10
water level therein, oi’ a safety bleed-oi! pipe opening into said reservoir, said reservoir hav
connected to said tank above the normal water ‘ing a quantity of liquid therein to build up a
3
level in the tank. a reservoir at the outlet end of back pressure‘ in said pipe.
6; In a saiety'appliance for steam jet refrig
said pipe and‘ having liquid therein, said pipe
15 being oi such length that the normal pressure eration systems including a ?ash tank having a 15
difference between the interior oi the ?ash tank normal water level therein, a safety bleed o?!
pipe connected to said tank- above the normal
and the interior oi the reservoir will raise a col
umn oi water in the pipe a height equal in feet water level in the tank, a reservoir at the outlet
oi water to, the diiierence between the absolute end of said pipe and having liquid therein, said
20 pressure in the ?ash tank and the absolute pres
pipe being oi such length that the normal pres-' 20
sure in the reservoir, whereby when said absolute sure diiierence' between the interior of the ?ash
pressure difference is reversed pressure will bleed tank and the interior oi the reservoir will raise
a column of water in, the pipe a height equal in‘
from said ?ash tank to said reservoir.
4. In a steam jet refrigeration system, the feet of water to the diiierence between the ab- .
, combination with a ?ash tank having a normal
‘so
35
solute pressure in the ?ash tank and the abso 25
water level therein, 01' a safety bleed-oft pipe lute pressure in the reservoir, whereby when said
connected to said tank above the normal water" absolute pressure di?'erence is reversed pressure
level in the tank‘, a reservoir at the outlet end 01' will bleed from said ?ash tank to said reservoir,_
said pipe and having liquid therein, said pipe and an over?ow connected to said reservoir
being oi such length‘ that the normal pressure above the normal liquid level therein whereby a 30
di?erence betweenthe interior of the ?ash tank seal will be maintained through said bleed oil
and the interior oi the reservoir will raise a pipe‘ to said ?ash tank at all times. .
column oi water in the pipes height equal in
ieet'oi water to the dl?erence between the ab
BARTLEY R. MCBATH, JR.
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