GB540085A - Improvements relating to the control of expansion valves in refrigerating apparatus - Google Patents

Improvements relating to the control of expansion valves in refrigerating apparatus

Info

Publication number
GB540085A
GB540085A GB1800/40A GB180040A GB540085A GB 540085 A GB540085 A GB 540085A GB 1800/40 A GB1800/40 A GB 1800/40A GB 180040 A GB180040 A GB 180040A GB 540085 A GB540085 A GB 540085A
Authority
GB
United Kingdom
Prior art keywords
valve
motor
contacts
superheat
evaporator
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
Application number
GB1800/40A
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.)
United Fruit Co
Original Assignee
United Fruit Co
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 United Fruit Co filed Critical United Fruit Co
Publication of GB540085A publication Critical patent/GB540085A/en
Expired legal-status Critical Current

Links

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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

540,085. Automatic control systems for refrigerating apparatus ; electric motor control ; switches. UNITED FRUIT CO. Jan. 29, 1940, No. 1800. Convention date, Nov. 24, 1939. [Class 38 (iv)] [Also in Group XXXVII] Temperature; fluid pressure.-A valve controlling the supply of refrigerant is automatically controlled to maintain a predetermined degree of superheat at a point in a refrigerating system. A member 94 responsive to pressure in the suction heater 6 of the evaporator 4, for example, is coupled to a member 102 carrying contacts 108, 112 in alternative control circuits for a reversible motor actuating an expansion valve 16 in the conduit supplying the evaporator. A member 104 responsive to the temperature at the same or some other suitable point in the system carries contacts engaging respectively with either of the contacts 108, 112 to energize the motor when the degree of superheat, determined by the distance between the contacts, is departed from. Manual means to adjust the valve is provided by a switch 70 and the motor speed may be varied by a resistance 66. The needle-type valve is actuated by a slow pitch screw and the motor is geared to turn the valve stem at the rate of about two revolutions per hour ; over regulation is thereby prevented. Limit switches 80, 82 are actuated by projections on the back and front respectively of a gear wheel fixed on the valve stem. The valve actuating motor may be electric, pneumatic, hydraulic or mechanical.
GB1800/40A 1939-11-24 1940-01-29 Improvements relating to the control of expansion valves in refrigerating apparatus Expired GB540085A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US305812A US2260682A (en) 1939-11-24 1939-11-24 Automatic expansion valve

Publications (1)

Publication Number Publication Date
GB540085A true GB540085A (en) 1941-10-06

Family

ID=23182456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1800/40A Expired GB540085A (en) 1939-11-24 1940-01-29 Improvements relating to the control of expansion valves in refrigerating apparatus

Country Status (2)

Country Link
US (1) US2260682A (en)
GB (1) GB540085A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461156A (en) * 1978-11-28 1984-07-24 Morton Weintraub System for conditioning an area
US4333317A (en) * 1980-08-04 1982-06-08 General Electric Company Superheat controller
DE3335837A1 (en) * 1983-10-01 1985-04-11 Brown, Boveri & Cie Ag, 6800 Mannheim REFRIGERATION PLANT
US4523436A (en) * 1983-12-22 1985-06-18 Carrier Corporation Incrementally adjustable electronic expansion valve
US4571951A (en) * 1984-12-14 1986-02-25 Vilter Manufacturing Corporation Electronic control for expansion valve in refrigeration system
EP1369648A3 (en) * 2002-06-04 2004-02-04 Sanyo Electric Co., Ltd. Supercritical refrigerant cycle system

Also Published As

Publication number Publication date
US2260682A (en) 1941-10-28

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