US3331216A - Liquid refrigerant cooled motor feed assurance means - Google Patents

Liquid refrigerant cooled motor feed assurance means Download PDF

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Publication number
US3331216A
US3331216A US495438A US49543865A US3331216A US 3331216 A US3331216 A US 3331216A US 495438 A US495438 A US 495438A US 49543865 A US49543865 A US 49543865A US 3331216 A US3331216 A US 3331216A
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US
United States
Prior art keywords
motor
chamber
liquid refrigerant
evaporator
refrigerant
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
US495438A
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English (en)
Inventor
Raymond E Rayner
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.)
Worthington Corp
Original Assignee
Worthington Corp
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 Worthington Corp filed Critical Worthington Corp
Priority to US495438A priority Critical patent/US3331216A/en
Priority to GB38608/66A priority patent/GB1152346A/en
Priority to FR76452A priority patent/FR1501021A/fr
Priority to DE19661501174 priority patent/DE1501174A1/de
Priority to CH1412566A priority patent/CH446409A/de
Application granted granted Critical
Publication of US3331216A publication Critical patent/US3331216A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25B31/006—Cooling of compressor or motor
    • F25B31/008—Cooling of compressor or motor by injecting a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F25B31/006—Cooling of compressor or motor

Definitions

  • This invention relates to a refrigeration system. More particularly, the invention relates to a condenser hotwell for a refrigeration system. Still more particularly, the invention relates to a condenser hotwell for a refrigeration system which is used as a liquid refrigerant cooled motor feed assurance means.
  • FIGURE 1 is a diagrammatic illustration of a refrigeration system embodying the invention.
  • FIGURE 2 is a perspective, partially cut-away, of the condenser hotwell embodying the invention.
  • FIGURE 3 is a plan View, partly broken away, of the condenser hotwell embodying the invention.
  • FIGURE 4 is a sectional view taken along line 44 of FIGURE 3.
  • FIGURE 5 is a sectional view taken along line 5-5 of FIGURE 4.
  • novel liquid refrigerant cooled motor feed ice assurance means is incorporated in a refrigeration system, designated generally as 10.
  • Refrigeration system 10 is illustrated diagrammatically in FIGURE 1 and includes, a compressor 12 having a suction inlet 14 connected by conduit 16 to the discharge 18 of an evaporator 20, for receiving and compressing vaporous refrigerant and forwarding the same through outlet 22 which connects to conduit 24 to pass the refrigerant to inlet 26 of condenser 28.
  • condenser 28 the refrigerant vapors are condensed in the usual manner and passed to hotwell 30 from which a portion of the liquid refrigerant will be delivered in line 32 to cool motor 34 used to power compressor 12.
  • Motor 34 will exhaust the refrigerant in line 36 int-o evaporator 20.
  • Hotwell 30 includes a collection chamber 42 designed to receive a supply of saturated or slightly subcooled liquid refrigerant normally at condenser pressure directly from the condenser 28 through holes 44 in shell plate 46 of condenser 28, which holes are positioned directly above the collection chamber 42. This is made possible by having casing 48 of hotwell 30 connected directly to shell plate 46 in such a manner as to position holes 44 in super position to collection chamber 42.
  • Adjacent collection chamber 42 is a feed chamber 50 which includes a motor feed chamber 52 and an evaporator feed chamber 54.
  • Darn 56 separates collection chamber 42 and feed chamber 50 so that the collection chamber is substantially smaller than the feed chamber, being approximately to /3 the area thereof.
  • a partition 58 extends the length of feed chamber 50 to separate motor feed chamber 52 and evaporator feed chamber 54 so that the area of motor feed chamber 52 is between A to /3 the size of evaporator feed chamber 54.
  • the inlet 60 of line 32 extends a short distance above the bottom 62 of casing 48. Likewise the side walls 64 of sump 66 extend a short distance above bottom 62.
  • the expansion device 68 as shown operates responsive to the level of liquid refrigerant collected in evaporator feed chamber 54 and serves to maintain a seal between the high pressure and low pressure side of refrigeration system 10.
  • the particular expansion device shown is a float controlled valve 70 which meters the passage of liquid refrigerant from evaporator feed chamber 54 and sump 66 into line 33 for passage to evaporator 20.
  • Valve 70 has a seat 72 which will normally prevent the passage of refrigerant into line 38.
  • a stem 74 extends from seat 72 and has the end thereof remote from seat 72 in slidable engagement with rod 76 whereby on movement of rod 76 the stem 74 and the connected seat 72 will be raised and lowered responsive to the liquid level of the refrigerant in chamber 54.
  • darn 56 is formed with a different height on either side of partition 58 so that the top 82 adjacent chamber 54 is substantially at 3 the same level as top 84 of partition 58.
  • the top 86 of dam 56 adjacent chamber 52 is substantially lower for purposes more fully described hereinafter.
  • a cover plate 88 extends from top 86 of dam 56 the full length and width of motor feed chamber 52. Cover plate 88 is formed with a plurality of perforations as at 90, the individual cross-sectional area of which is substantially smaller than the cross sectional area of inlet 60 of line 32.
  • the liquid refrigerant from condenser 28 will pass through holes 44 as it condenses to be collected in collection chamber 42 at substantially condenser pressure and a saturated or slightly subcooled temperature. As the amount of the liquid refrigerant in chamber 42 increases it will shortly reach the height of top 86 and cover plate 88 so that it will begin to pass over cover plate 88. Perforations 90 in cover plate 88 will permit the liquid refrigerant to enter motor feed chamber 52.
  • Collection chamber 42 will permit initial settling of foreign matter in the liquid refrigerant. Any foreign matter not settled therein, if larger than the cross-sectional area of perforations 90 will be caught on cover plate 88. Additionally, a secondary settling action is afforded by raising the inlet 60 above the bottom 62 of casing 48. These combined features act to settle and strain out any foreign matter in the liquid refrigerant. The utilization of the cover plate 88 whose face area is many times that of the cross-sectional area of inlet 60 will permit the passage of the liquid refrigerant at a minimum pressure drop while preventing both clogging and passage of harmful foreign matter which might damage the motor 34.
  • liquid refrigerant in collection chamber 42 will also begin to enter evaporator feed chamber 54 where secondary straining and settling will be accomplished by the raised sides 64 of sump 66, prior to permitting the passage of liquid refrigerant from chamber 54 and sump 66 in line 38 to evaporator 20. Thereafter liquid refrigerant will be delivered to collection chamber 42 from condenser 28, the amount delivered being dependent upon the operating conditions of the system. However, regardless of the capacity at which system operates collection chamber 42 will continuously permit the liquid refrigerant to be delivered to motor chamber 52 whether or not liquid refrigerant is being delivered to evaporator feed chamber 54. In this way adequate cooling of motor 34 is insured by providing a full feed of liquid refrigerant at all times during normal operation, regardless of the loads on refrigeration system 10.
  • the total quantity of refrigerant in system 10 need not be excessive, while still permitting suflicient area in evaporator feed chamber so as to reduce turbulence and its detrimental effects on float 78 and valve 70.
  • a hot well for a refrigeration system having a compressor, a condenser, and an evaporator connected by conduit means into a closed refrigeration loop, the compressor driven by a motor, the hotwell comprising:
  • conduit means connected between the motor and the motor feed chamber
  • the section of the dam means bordering the motor feed chamber having a height which is less than the height of the section bordering the evaporator feed chamber whereby straining of the refrigerant in the 5 collecting chamber and early continuous refrigerant flow to the motor will be assured.
  • the motor feed chamber is of smaller area than the collection chamber whereby a continuous feed of liquid refrigerant thereto is readily maintained.
  • the motor feed conduit means having a raised inlet to serve as a secondary strainer to limit the passage of foreign matter in the liquid refrigerant thereto.
  • a hotwell for a refrigeration system having a compressor, a condenser, and an evaporator connected by conduit means into a closed refrigeration loop, the compressor driven by a motor, the hotwell comprising:
  • conduit means connected between the motor and the motor feed chamber
  • a hotwell for a refrigeration system having a motor driven compressor; a condenser, and an evaporator connected by conduit means into a closed refrigeration loop, the hotwell comprising:
  • (c) means for allowing flow from the reservoir into the motor feed container when the height of the refrigerant in the reservoir exceeds a predetermined value
  • an evaporator feed container having an outlet connected to a conduit for supplying refrigerant to the evaporator and a float controlled valve for controlling the flow into the conduit so as to maintain a liquid seal between the evaporator and the condenser;
  • (e) means for allowing flow from either the reservoir or the motor feed container into the evaporator feed container when the level of refrigerant within the motor feed container reaches a predetermined value.
  • the hotwell defined in claim 7 including a perforated cover plate over the motor feed container.
  • a hotwell for a refrigeration system having a compressor, a condenser, and an evaporator connected by conduit means into a closed refrigeration loop, the compressor driven by a motor, the hotwell comprising:
  • an evaporator feed container having an outlet communicating with the evaporator for supplying refrigerant thereto;
  • the Wall means having an opening at a first level for allowing refrigerant to flow from the reservoir into the motor feed container and second opening at a higher level than the first for allowing refrigerant to flow from the reservoir into the evaporator feed container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US495438A 1965-10-13 1965-10-13 Liquid refrigerant cooled motor feed assurance means Expired - Lifetime US3331216A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US495438A US3331216A (en) 1965-10-13 1965-10-13 Liquid refrigerant cooled motor feed assurance means
GB38608/66A GB1152346A (en) 1965-10-13 1966-08-30 Improvements in or relating to Refrigeration Systems
FR76452A FR1501021A (fr) 1965-10-13 1966-09-15 Bâche de condenseur applicable au circuit de refroidissement d'un moteur
DE19661501174 DE1501174A1 (de) 1965-10-13 1966-09-24 Kaeltemittelsammler fuer eine Kaelteanlage
CH1412566A CH446409A (de) 1965-10-13 1966-09-30 Kälteanlage mit einem Kältemittelsammler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US495438A US3331216A (en) 1965-10-13 1965-10-13 Liquid refrigerant cooled motor feed assurance means

Publications (1)

Publication Number Publication Date
US3331216A true US3331216A (en) 1967-07-18

Family

ID=23968652

Family Applications (1)

Application Number Title Priority Date Filing Date
US495438A Expired - Lifetime US3331216A (en) 1965-10-13 1965-10-13 Liquid refrigerant cooled motor feed assurance means

Country Status (5)

Country Link
US (1) US3331216A (de)
CH (1) CH446409A (de)
DE (1) DE1501174A1 (de)
FR (1) FR1501021A (de)
GB (1) GB1152346A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579305A1 (fr) * 1985-03-19 1986-09-26 Ebara Corp Appareil de refroidissement du moteur d'un refrigerateur
US5499509A (en) * 1994-08-16 1996-03-19 American Standard Inc. Noise control in a centrifugal chiller
WO2000022358A1 (en) * 1998-10-09 2000-04-20 American Standard Inc. Liquid chiller with enhanced motor cooling and lubrication
US9366238B2 (en) 2013-03-13 2016-06-14 Lockheed Martin Corporation System and process of cooling an OTEC working fluid pump motor
US10234179B2 (en) 2013-08-20 2019-03-19 Efficient Energy Gmbh Thermodynamic device and method of producing a thermodynamic device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921445A (en) * 1956-02-17 1960-01-19 Carrier Corp Centrifugal refrigeration machines
US3022638A (en) * 1959-05-06 1962-02-27 Carrier Corp Controls for refrigeration apparatus
US3122894A (en) * 1962-07-05 1964-03-03 American Radiator & Standard Hermetic motor cooling by direct expansion of system refrigerant into motor
US3218825A (en) * 1962-08-14 1965-11-23 Trane Co Refrigerating apparatus including means for cooling compressor motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921445A (en) * 1956-02-17 1960-01-19 Carrier Corp Centrifugal refrigeration machines
US3022638A (en) * 1959-05-06 1962-02-27 Carrier Corp Controls for refrigeration apparatus
US3122894A (en) * 1962-07-05 1964-03-03 American Radiator & Standard Hermetic motor cooling by direct expansion of system refrigerant into motor
US3218825A (en) * 1962-08-14 1965-11-23 Trane Co Refrigerating apparatus including means for cooling compressor motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579305A1 (fr) * 1985-03-19 1986-09-26 Ebara Corp Appareil de refroidissement du moteur d'un refrigerateur
US5499509A (en) * 1994-08-16 1996-03-19 American Standard Inc. Noise control in a centrifugal chiller
WO2000022358A1 (en) * 1998-10-09 2000-04-20 American Standard Inc. Liquid chiller with enhanced motor cooling and lubrication
US6065297A (en) * 1998-10-09 2000-05-23 American Standard Inc. Liquid chiller with enhanced motor cooling and lubrication
US9366238B2 (en) 2013-03-13 2016-06-14 Lockheed Martin Corporation System and process of cooling an OTEC working fluid pump motor
US10234179B2 (en) 2013-08-20 2019-03-19 Efficient Energy Gmbh Thermodynamic device and method of producing a thermodynamic device

Also Published As

Publication number Publication date
FR1501021A (fr) 1967-11-10
DE1501174A1 (de) 1969-10-16
CH446409A (de) 1967-11-15
GB1152346A (en) 1969-05-14

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