Патент USA US2105545код для вставки
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.