US1910840A - Refrigerating machine - Google Patents

Refrigerating machine Download PDF

Info

Publication number
US1910840A
US1910840A US597456A US59745632A US1910840A US 1910840 A US1910840 A US 1910840A US 597456 A US597456 A US 597456A US 59745632 A US59745632 A US 59745632A US 1910840 A US1910840 A US 1910840A
Authority
US
United States
Prior art keywords
nozzle
injector
compressor
evaporator
needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US597456A
Other languages
English (en)
Inventor
Kagi Emil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
Application granted granted Critical
Publication of US1910840A publication Critical patent/US1910840A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0016—Ejectors for creating an oil recirculation

Definitions

  • the I object of the invention is to provide an improved means for automatically returning from the evaporator to the compressor of a refrigerating machine oil used for lubrication and sealingv the clearances of the moving parts.
  • the chamber which is maintained at a lower pressure than the evaporator and to which the discharge pipe of the oil accumulator is connected, con- I stitutes' the suction chamber of an injector which is operated by the refrigerating medium supplied to the compressor.
  • the cross-sectional area of the admission nozzle of the injector is adjustable for the purpose of varying the suction in the oil discharge pipe in accordance with the working conditions in the machine.
  • tapered needle is mounted adjacent the nozzle so that it is movable in the direction of the nozzle axis and it tapers in the. direction of the flow through the nozzle.
  • the position of the needle is automatically controlled by the admission pressure of the refrigerating medium supplied fromthe evaporator.
  • the needle may be mounted on a movable member which is actuated'in accordance with the difference between this admission pressure and the atmosphericpressure or the pressure of the refrigerating medium in the condenser or the pressure on the outlet side of the admission nozzle.
  • the needle is mounted on a movable piston-like member the two sides of which are respectively exposed to the two controlling pressures.
  • the initial setting of the needle may be varied by adjusting by hand the tension of a spring acting on the movable member carrying the needle.
  • the position of the needle in accordance with the admission pressure it may be controlled by a thermostat or other tempera. ture responsive device associated with the evaporator so that the cross-sectional area Conveniently a mg drawings.
  • FIG. 1 shows a refrigerating plant according to the invention
  • Figures 2 to 5 show different constructions of the injector in sectional side elevations.
  • This discharge pipe (1 opens into the suction chamber of an injector a, b which is so connected to the suction pipe 6 of the compressor C that it is operated by the refrigerating medium. Oil collecting in the collector A is thus drawn up into the suction chamber of the injector a, 6 without appreciable loss of pressure of the refrigeratin medium and is'carried away by the rapidly moving refrigerating medium and returned to the compressor in an atomized state.
  • the refrigerating medium from the evaporator passes from'pipe a through the admission
  • the evaporator has an ail collector A, from which oil A tapered needle 9 is, mounted on a piston-like member Zr, which moves in a cylinder formed in the casing f of the injector, so that the needle is tapered in the direction of the flow of the refrigerating medium from the pipe 0 through the admission nozzle a.
  • b y adjusting the posiof the nozzle a and acts to vary the effective cross-sectional area of this nozzle.
  • the upper side of the piston is is connected to the top of the injector casing by a flexible corrugated diaphragm h which does not prevent the free movement of the 100 tion of the piston is the needle 9 is moved along the axis spring a is arranged between the upper side of the piston 70 and a plug Z which is mounted in the top of the casing so that it can be rotated by hand to vary the tension of the spring 71 by means of a key which fits within a square or rectangular recess in the top thereof.
  • the pressure in the evaporator will usually be high and the refrigerating medium drawn into the injector will thus be comparatively heavy so that the effective weight of the medium passing through the admission nozzle past the end of the oil pipe will be comparatively large.
  • the kinetic energy of the refrigerating lmedium inthe admission nozzle will be su cient for inducing in the pipe (3 a suction pressure which is lower than that in the pipe 0 and, is quite sufiicient' for pumping the oil from the collector into the injector and thence back to the compressor.
  • the evaporator pressure will decrease with the result that the refrigerating medium or vapour drawn in will become lighter.
  • the kinetic energy of this vapourin the admission nozzle is thus reduced and may even decrease to such a value that it is ins'uflicient for pumping any oil.
  • This decrease in the effective weight of refrigerating medium passing through the admission nozzle is, in accordance with the present invention, compensated for by decreasing the area of the nozzle so as to maintain the kinetic energy at the desired value.
  • the piston When the admission pressure decreases the piston is moves downwards thus reducing the cross-sectional area of the admission nozzle and consequently increasing the kinetic energy of the vapour passing through the nozzle.
  • the tension of the spring 2' is set by adjusting the screw plug Z so that the piston 70 moves to adjust the position of the needle 9, in accordance with changes in the pressure of the refrigerating medium pumped from the evaporator, to maintain the kinetic energy of the vapour passing through the admission nozzle a at substantially the correct value for pumping the requisite quantity of oil irrespective of changes in the operating conditions of the machine.
  • the upper side of the piston I0 is formed as a cylinder for another iston p the upper side of which is connected y a corrugated flexible diaphragm a, similar to the diaphragm h, to a screw plug 9 in the top of the in'ector having an aperture connected bya pipe 0 to the condenser of the machine.
  • the upper side of the piston 12 is thus exposed to the condenser pressure the sleeve 11.
  • a spring on is arranged between the up er side of the piston lo and the under side 0? the piston 12 so that movements of the piston 2 due to variations in the pressure in the condenser are communicated to the piston is through this spring, the initial tension of the spring m being adjusted by varying the position of the screw plug g.
  • the upper surface of the piston is connected through a duct at the top of the injector casing and a pipe 1" to the oil supply pipe (1 near the point at which it is connected to the injector casing.
  • the piston is thus controlled in accordance with variations in the diiference between the pressure of the refrigeratin medium drawn from the evaporator and t e pressure onthe outlet side of the admission nozzle. It is to be noted that as the pressure on the outlet side of the nozzle increases due to the decrease of the kinetic energy in the nozzle the piston 70 moves downwards thus decreasing the area of the nozzle so that the kinetic energy in the nozzle is again raised to the required value.
  • This construction also differs from the arrangement shown in Figure 2 in that the vprovi ed for the top of the recess in the easing into which the plunger Z fits so as to ensure an air tight joint in the part of the casing above the piston k.
  • the needle 9 constitutes the lower end of a rod m which is mounted in a bearing carried by the casing f so that it is coaxial with the admission nozzle a.
  • the upper end of the rod .1; is connected by links to the rod of a piston to mounted on a flexible diaphragm v one end of which is connected to the casing f and the other end to the piston w.
  • the interior of the diaphragm *v communicates, by means of a pipe u, with a temperature responsive device such as a thermostat (not shown) which is arranged on or in, the
  • the diaphragm 0 thus expands or contracts in accordance with changes in the temperature of the evaporator, the movement of the diaphragm causing corresponding movement of the piston w and thus, through the'link mechanism and rod w, of the needle 9.
  • a refrigerating machine comprising a main evaporator, a compressor, and a means between the evaporator and the compressor fol-returning the lubricant and the refrigerant from said evaporator directly to said compressor and including an injector'having a pressure chamber and a suction chamber, a lubricant collector for collecting by gravity lubricant from the refrigerant, a discharge pipe connecting the said collector to the sues tion chamber of said injector, a pipe leading from the pressure chamber of said injector directly to the compressor, the crosssectional area of the admission nozzle of the injector being adjustable for the purpose of controlling the suction .
  • the oil discharge pipe in accordance with the working conditions in the maclnne, said nozzle having a needle-member therein, to control the cross-sectionalv area thereof, said 'member being tapered in the direction of flow through the nozzle.
  • a refrigerating machine comprising a main evaporator, a compressor, and a means between the evaporator and the compressor for returning the lubricant and the refri erant from said evaporator directly to said compressor and including an injector having a pressure chamber and a suction chamber, a lubricant collector for collecting by gravity lubricant from the refrigerant, a discharge pipe connecting the sa1d collector to the suction chamber of said injector, a pipe leading from the pressure chamber of said injector directly to the compressor, the crosssectional area of the admission nozzle of the injector being adjustable for the purpose of controlling the suction in the oil discharge pipe in accordance with the working conditions in the machine, said nozzle having a needle-member therein to control the cross-sectional area thereof, said memher being tapered in the direction of flow through the nozzle, and being movable in the direction'of the nozzle axis.
  • a refrigerating machine comprising a main evaporator, a compressor, and a means between the evaporator and the compressor for returning the lubricant and the refri erant from said evaporator directly to said compressor and including an'injector having a pressure chamber and a suction chamber, a lubricant collector for collecting by gravity lubricant from the refrigerant, a discharge pipe connecting the said collector to the suction chamber of said injector, a
  • a refrigerating machine comprising a main evaporator, a compressor, and a means between the evaporator and the compressor for returning the lubricant and the refrigerant from said eva orator directly to said compressor and inc uding an injector having a pressure chamber and a suction chamber, a lubricant collectorfor collecting by gravity lubricant from the refrigerant, a discharge pipe connecting the said collector to the suction chamber of said injector, a pipe leading from the pressure chamber of said injector directly to the compressor, the cross-sectional area of the ad mission nozzle of the injector being adjustable for the purpose of controlling the suc tion in the oil discharge pipe in accordance with the working conditions in the machine, said nozzle having a needle-member therein, to control the cross-sectional area thereof, said memberbeing tapered in the direction of flow through the nozzle, and means for automatically varying the position of said needle in accordance with the difference between the pressure of the refrigerant admitted thereto and that of the atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
US597456A 1931-08-17 1932-03-08 Refrigerating machine Expired - Lifetime US1910840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH156330T 1931-08-17

Publications (1)

Publication Number Publication Date
US1910840A true US1910840A (en) 1933-05-23

Family

ID=1795313

Family Applications (1)

Application Number Title Priority Date Filing Date
US597456A Expired - Lifetime US1910840A (en) 1931-08-17 1932-03-08 Refrigerating machine

Country Status (6)

Country Link
US (1) US1910840A (enrdf_load_stackoverflow)
CH (1) CH156330A (enrdf_load_stackoverflow)
DE (1) DE569349C (enrdf_load_stackoverflow)
FR (1) FR41333E (enrdf_load_stackoverflow)
GB (1) GB381054A (enrdf_load_stackoverflow)
NL (1) NL31126C (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986005576A1 (en) * 1985-03-22 1986-09-25 Svenska Rotor Maskiner Ab Method for refrigeration systems
US5165248A (en) * 1991-09-03 1992-11-24 Carrier Corporation Oil reclaim in a centrifugal chiller system
WO2006128457A1 (en) * 2005-05-30 2006-12-07 Johnson Controls Denmark Aps Oil separation in a cooling circuit
CN104075508A (zh) * 2014-07-01 2014-10-01 浙江大学宁波理工学院 随冷凝温度自动调节面积比的喷射器及喷射式制冷机
CN104089439A (zh) * 2014-07-01 2014-10-08 浙江大学宁波理工学院 随蒸发温度自动调节面积比的喷射器及喷射式制冷机
US11435116B2 (en) 2017-09-25 2022-09-06 Johnson Controls Tyco IP Holdings LLP Two step oil motive eductor system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073155B (de) * 1960-01-14 Dragerwerk Hemr & Bernh Diager Lübeck Sekretpumpe m Form einer Ejektorpumpe
DE1039189B (de) * 1955-03-05 1958-09-18 Hans Richter Einrichtung zum Entwaessern von Druckluft
DE3219023A1 (de) * 1982-05-19 1983-11-24 Linde Ag, 6200 Wiesbaden Anlage, in der ein kaeltemittel im kreislauf gefuehrt wird
DE3709429A1 (de) * 1987-03-21 1988-10-06 Ingelheim Peter Graf Von Hub- oder rotationskolbenpumpenanlage fuer niedrige druecke, insbesondere schmieroelpumpenanlage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986005576A1 (en) * 1985-03-22 1986-09-25 Svenska Rotor Maskiner Ab Method for refrigeration systems
US5165248A (en) * 1991-09-03 1992-11-24 Carrier Corporation Oil reclaim in a centrifugal chiller system
WO2006128457A1 (en) * 2005-05-30 2006-12-07 Johnson Controls Denmark Aps Oil separation in a cooling circuit
US20090126376A1 (en) * 2005-05-30 2009-05-21 Johnson Controls Denmark Aps Oil Separation in a Cooling Circuit
CN104075508A (zh) * 2014-07-01 2014-10-01 浙江大学宁波理工学院 随冷凝温度自动调节面积比的喷射器及喷射式制冷机
CN104089439A (zh) * 2014-07-01 2014-10-08 浙江大学宁波理工学院 随蒸发温度自动调节面积比的喷射器及喷射式制冷机
US11435116B2 (en) 2017-09-25 2022-09-06 Johnson Controls Tyco IP Holdings LLP Two step oil motive eductor system

Also Published As

Publication number Publication date
CH156330A (de) 1932-07-31
FR41333E (fr) 1932-12-03
NL31126C (enrdf_load_stackoverflow) 1933-10-16
DE569349C (de) 1933-02-01
GB381054A (en) 1932-09-29

Similar Documents

Publication Publication Date Title
US1910840A (en) Refrigerating machine
US2475556A (en) Refrigeration system, including valve controls
US2145354A (en) Refrigerating apparatus
US1408453A (en) Refrigerating apparatus
US2761615A (en) Variable capacity compressor
US2080288A (en) Refrigerating apparatus
US2412503A (en) Modulating compressor capacity control
US2369841A (en) Variable capacity compressor
US1880653A (en) Refrigerating apparatus
US2415338A (en) Refrigeration system and expansion valve therefor
US2637981A (en) Refrigeration machine
US2583285A (en) Hydraulic piston-control rigging for refrigerator-compressors
US1951915A (en) Refrigerating machine
US1931833A (en) Compressor
US3074619A (en) Method of and means for combined operation of automatically capacity regulated compressors
US2759674A (en) Thermostatic suction pressure regulator for refrigeration installations
US2171239A (en) Refrigerator heat interchanger
US2498861A (en) Reverse cycle refrigerating system
US1971695A (en) Expansion valve
US2240354A (en) Refrigerating apparatus
US2051185A (en) Steam jet refrigeration apparatus
GB1360754A (en) Regulator for centralized refrigerating system
US2085942A (en) Refrigerating apparatus
US2008715A (en) Refrigerating apparatus
US2022774A (en) Refrigerating apparatus