EP0205670B1 - Kälte- oder Wärmepumpensystem - Google Patents

Kälte- oder Wärmepumpensystem Download PDF

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Publication number
EP0205670B1
EP0205670B1 EP85200969A EP85200969A EP0205670B1 EP 0205670 B1 EP0205670 B1 EP 0205670B1 EP 85200969 A EP85200969 A EP 85200969A EP 85200969 A EP85200969 A EP 85200969A EP 0205670 B1 EP0205670 B1 EP 0205670B1
Authority
EP
European Patent Office
Prior art keywords
bypass
valve member
compressor
refrigerating
electric motor
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
EP85200969A
Other languages
English (en)
French (fr)
Other versions
EP0205670A1 (de
Inventor
Lambert Johannes Maria Kuijpers
Martinus Johannes Petrus Janssen
Johannes Adrianus De Wit
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.)
Whirlpool International BV
Original Assignee
Whirlpool International BV
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 Whirlpool International BV filed Critical Whirlpool International BV
Priority to DE8585200969T priority Critical patent/DE3573951D1/de
Priority to EP85200969A priority patent/EP0205670B1/de
Priority to ES1986294801U priority patent/ES294801Y/es
Priority to JP61140410A priority patent/JPS61291789A/ja
Publication of EP0205670A1 publication Critical patent/EP0205670A1/de
Application granted granted Critical
Publication of EP0205670B1 publication Critical patent/EP0205670B1/de
Expired 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • 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
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator

Definitions

  • the invention aims at improving the efficiency of the system by means of a simple and cheap control mechanism.
  • Suction-gas control reduces the refrigerant mass being circulated, so that the evaporator temperature increases and the condensor temperature decreases, thereby reducing the work of compression.
  • cold is produced at a higher temperature than in an on/ off controlled system.
  • the mass to be circulated by the compressor is smaller, so that the torque to be delivered by the electric motor is reduced and the efficiency decreases. Therefore, in order to maintain the efficiency of the electric motor at the same level, the power is reduced in an efficient manner during said period.
  • the combined control of the system in accordance with the invention results in a net reduction in power consumption of approximately 10%.
  • the system in accordance with the invention also comprises a control mechanism which reduces the power of the electric motor in an efficient manner when the bypass 24 is connected.
  • Fig. 4 shows two efficiency/torque curves of the electric motor. In curve I the motor power is higher than in curve 11. During the period in which the compressor operates with a closed bypass the operating range of the electric motor is situated between points A and B of curve I. Ifthe bypass 24 between the pipe 19 and the compression space 21 is now opened, the torque Twill decrease, and hence the efficiency will decrease. The electric motor then operates for example between points C and D. The efficiency can be increased by reducing, for example, the voltage. The electric motor then operates, for example, in the range E-F of curve II, in which the efficiency is high.
  • the switch S1 At a maximum evaporator temperature (for example -3°C) the switch S1 is set to the right-hand position (full power) and at a variable minimum evaporator temperature (for example -16 to -24°C) to the left-hand position (reduced power). If the compressor operates at full power (S1 in the right-hand position) switch S2 is open and the coil 29 of the electromagnet 28 for the actuation of the valve member 26 is not energized. However, in the case of reduced compressor power switch S2 is closed and the electromagnet is energized, so that the valve member 26 opens the bypass duct 24 between the suction duct 19 and the compression space 21.
  • a maximum evaporator temperature for example -3°C
  • the switch S1 At a maximum evaporator temperature (for example -3°C) the switch S1 is set to the right-hand position (full power) and at a variable minimum evaporator temperature (for example -16 to -24°C) to the left-hand position (

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (4)

1. Kälte- oder Wärmepumpensystem mit einem Verdampfer (1), einem Verdichter (2), einem Kondensator (3) und mit einem Drosselelement (4), wobei der Verdichter eines Elektromotor (6) aufweist sowie eine Kolbenpumpe (7), die einen Zylinder (8) aufweist, in dem ein Kolben (9) von dem Elektromotor (6) hin- und herbewegt wird, und zwar zur Beeinflussung eines Verdichtungsraumes (21) über dem Kolben, wobei der Verdichter einen Einlass (16) und einen Auslass (17) aufweist, die mittels Rohre mit dem Verdampfer bzw. dem Kondensator verbunden sind, und weiterhin einen Ansaugteil (18, 19, 20), eine Umströmleitung, durch die der Ansaugteil mit dem Verdichtungsraum 1 in Verbindung gebracht werden kann, sowie ein elektromagnetisch gesteuertes Ventilelement (26) in der Umströmleitung, dadurch gekennzeichnet, dass das System einen Steuermechanismus aufweist zur kombinierten Steuerung des Elektromotors (6) und des Ventilelementes (26), derart, dass die Spannung des Elektromotors verringert wird, wenn die Umströmleitung (24) geöffnet wird.
2. Kälte- oder Wärmepumpensystem nach Anspruch 1, dadurch gekennzeichnet, dass der Ansaugteil einen Dämpfer (18), eine Saugleitung (19) und eine Saugkammer (20) aufweist, wobei die Umströmleitung (24) zwischen der Saugleitung (19) und dem Verdichtungsraum (21) liegt und das Ventilelement (26) mit dem Kern (27) eines Elektromagneten (28) gekuppelt ist, wobei das Ventilelement die Umströmleitung öffnet, wenn der Elektromagnet angeregt wird und die Umströmleitung mit Hilfe einer Rückkehrfeder (30) schliesst, wenn der Elektromagnet nicht erregt ist.
3. Kälte- oder Wärmepumpensystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Zylinder (8) mit einer Bohrung (25) versehen ist, in der das Ventilelement (26) beweglich ist, wobei diese Bohrung die Umströmleitung (24) schneidet, wobei das Ventilelement eine derartige Bohrung (31) aufweist, dass bei Erregung des Elektromagneten (28) diese Bohrung zu der Umströmleitung fluchtend liegt.
4. Kälte- oder Wärmepumpensystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Widerstand des Drosselelementes (4) grösser wird, wenn die Umströmleitung (24) geöffnet wird.
EP85200969A 1985-06-19 1985-06-19 Kälte- oder Wärmepumpensystem Expired EP0205670B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8585200969T DE3573951D1 (en) 1985-06-19 1985-06-19 Refrigerating or heat-pump system
EP85200969A EP0205670B1 (de) 1985-06-19 1985-06-19 Kälte- oder Wärmepumpensystem
ES1986294801U ES294801Y (es) 1985-06-19 1986-06-16 Una disposicion de refrigeracion o de bomba de calor
JP61140410A JPS61291789A (ja) 1985-06-19 1986-06-18 冷却又は熱ポンプ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85200969A EP0205670B1 (de) 1985-06-19 1985-06-19 Kälte- oder Wärmepumpensystem

Publications (2)

Publication Number Publication Date
EP0205670A1 EP0205670A1 (de) 1986-12-30
EP0205670B1 true EP0205670B1 (de) 1989-10-25

Family

ID=8194034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200969A Expired EP0205670B1 (de) 1985-06-19 1985-06-19 Kälte- oder Wärmepumpensystem

Country Status (4)

Country Link
EP (1) EP0205670B1 (de)
JP (1) JPS61291789A (de)
DE (1) DE3573951D1 (de)
ES (1) ES294801Y (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1259589B (it) * 1992-06-22 1996-03-20 Bendix Heavy Vehicle Syst Compressore volumetrico alternativo a stantuffo, particolarmente per impianti pneumatici di frenatura.
IT1268893B1 (it) * 1994-12-21 1997-03-13 Carpigiani Group Ali Srl Macchina combinata per la produzione alternativa di granite o di gelato.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074911A (en) * 1930-05-30 1937-03-23 Gen Motors Corp Refrigerating apparatus
US2007388A (en) * 1931-09-15 1935-07-09 Westinghouse Electric & Mfg Co Valve construction
US2364038A (en) * 1941-12-06 1944-11-28 Touborg Jens Hermetic refrigeration compressor
US3360952A (en) * 1966-06-28 1968-01-02 Trane Co Capacity controlled refrigeration system
US3942912A (en) * 1974-10-04 1976-03-09 Lennox Industries Inc. Method for controlling the operation of two-speed, refrigerant motor compressors
DE2615768B2 (de) * 1976-04-10 1978-04-20 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Verfahren zur Steuerung des Drehmomentes eines Asynchronmotors
DE2910966A1 (de) * 1979-03-21 1980-10-02 Bosch Gmbh Robert Kaelteverdichter
NL8200765A (nl) * 1982-02-25 1983-09-16 Grasso Koninkl Maschf Capaciteitsregelklep voor een compressor.
JPS58193055A (ja) * 1982-05-04 1983-11-10 株式会社東芝 ヒ−トポンプ形エアコン

Also Published As

Publication number Publication date
ES294801Y (es) 1987-08-16
JPS61291789A (ja) 1986-12-22
DE3573951D1 (en) 1989-11-30
ES294801U (es) 1987-01-01
EP0205670A1 (de) 1986-12-30

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