EP0476739A1 - Elektronische Vorrichtung zur Regelung der Verflüssigung in einem Kältekreislauf einer Eisherstellungsmaschine - Google Patents

Elektronische Vorrichtung zur Regelung der Verflüssigung in einem Kältekreislauf einer Eisherstellungsmaschine Download PDF

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Publication number
EP0476739A1
EP0476739A1 EP91202185A EP91202185A EP0476739A1 EP 0476739 A1 EP0476739 A1 EP 0476739A1 EP 91202185 A EP91202185 A EP 91202185A EP 91202185 A EP91202185 A EP 91202185A EP 0476739 A1 EP0476739 A1 EP 0476739A1
Authority
EP
European Patent Office
Prior art keywords
temperature
condenser
machine
probe
ice
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.)
Withdrawn
Application number
EP91202185A
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English (en)
French (fr)
Inventor
Paolo Portelli
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.)
Castel Mac SpA
Original Assignee
Castel Mac SpA
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 Castel Mac SpA filed Critical Castel Mac SpA
Publication of EP0476739A1 publication Critical patent/EP0476739A1/de
Withdrawn legal-status Critical Current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
    • F25B49/027—Condenser control arrangements

Definitions

  • the present invention relates to an electronic device for controlling condensation in a refrigerating circuit of an ice-making machine.
  • a machine for making ice chips comprises essentially a freezing chamber supplied with water from a hydraulic circuit and a refrigerating circuit formed by a compressor for the compression of a fluid in the gaseous state (generally a chloro-fluoro carbide), an air- or water-circulation condenser where the fluid pumped by the compressor is cooled until it liquefies, a lamination member (valve capillary) for supplying the liquid and an evaporator where its expansion takes place with the withdrawal of heat from the external environment.
  • the refrigerating circuit's evaporator is associated with the freezing chamber for transforming into ice the water present in it.
  • a screw rotating inside the chamber conveys the ice as it is formed toward a delivery mouth in the proximity of a container for collecting the ice.
  • Such control is carried out through a pair of moving mechanical members such as servo pressure switches.
  • the use of such control systems involves re-starting the machine as soon as normal pressure conditions have been restored in the condenser without waiting for a length of time sufficient for the compressor to cool down.
  • the object of the present invention is to overcome the mentioned drawbacks with a device for controlling condensation wherein the detection of the temperature and thus of the pressure is made with a static member and the machine is re-started after a time interval such as to allow the restoration of normal operating conditions of all the refrigerating circuit's components.
  • an electronic device for controlling condensation in a refrigerating circuit of an ice-making machine characterized in that it comprises a probe suitable for taking the temperature of the condenser and an electronic control circuit that receives from said probe a signal related to the temperature of the condenser and causes the operation and stoppage of a device for cooling the condenser and so as to maintain the temperature of the same within a given range of values, as well as to cause the machine to stop if a maximum emergency temperature is exceeded and until normal temperature conditions have been restored.
  • the use of the electronic circuit also allows the machine to be re-started with a given delay after normal temperature conditions have been restored so as to allow the compressor to cool down.
  • a machine for making ice chips that comprises a freezing chamber 21 supplied with water from a hydraulic circuit 22, an evaporator 23 of a refrigerating circuit 27 associated with the chamber 21 for cooling and consequently transforming into ice the water in the chamber 21, a motorized screw 24 made to rotate inside the chamber 21 for conveying the ice as it is formed toward a delivery mouth 25 in the proximity of a container for collecting the ice, not shown, and a motorization unit 26 of the screw 25.
  • the refrigerating circuit 27 comprises a compressor 1 for the compression of a fluid in the gaseous state such as, say, a chloro-fluoro carbide, an air-cooled condenser 2 where the fluid pumped by the compressor 1 is cooled until it liquefies, a device for cooling the condenser 2, such as a fan 4, a lamination member 36 (Fig. 1) for the passage of the fluid to the evaporator 23.
  • a compressor 1 for the compression of a fluid in the gaseous state such as, say, a chloro-fluoro carbide
  • an air-cooled condenser 2 where the fluid pumped by the compressor 1 is cooled until it liquefies
  • a device for cooling the condenser 2 such as a fan 4
  • a lamination member 36 Fig. 1 for the passage of the fluid to the evaporator 23.
  • the electronic control circuit 6 comprises a comparator 9 across an input of which there is applied a temperature signal from the probe 7, that is compared with a reference voltage present across its other input.
  • a microprocessor 12 which comprises an input register 13 for the temporary storage of the values at the output from the comparator 9, a RAM memory 15 in which the digital values from the register 13 are stored, an EPROM memory 16 in which the program data indicative of the emergency temperature inside the condenser have previously been stored, a central processing unit 14 suitable for operating the comparison between the digital values in the RAM memory 15 and in the EPROM 16, an output register 17 for storing the result of the comparison made by the unit 14.
  • a timer 33 which has the object of delaying by a pre-determined length of time the re-activation of the machine when the correct temperature conditions inside the condenser 2 have been restored.
  • an optical signal unit 10 To the output from the microprocessor 14 there are connected an optical signal unit 10 and a power circuit 18 suitable for operating the machine's power unit 8. To the output of the comparator 9 there is also connected a power circuit 19 of the cooling device, in particular of the fan 4, illustrated in Fig. 2.
  • the cooling device in a water-cooling cycle can be a hydraulic circuit controlled by a solenoid valve 5 suitable for supplying water through the condenser 3.
  • the hydraulic circuit 22 supplies water to the freezing chamber 21 for its transformation into ice thanks to the evaporator 23.
  • the screw 24, made to rotate by the motorization unit 26, pushes the ice as it is formed towards the delivery mouth 25. From the delivery mouth 25 the ice is moved through the conduit 28 into a collection container, not shown.
  • the signal received by the comparator 9 passes to the microprocessor 12 and is introduced into the input register 13 to be than made to pass into the RAM 15 to be compared by the processing unit 14 with the program dara previously stored in the EPROM 16.
  • the result of the comparison is stored in the output register 17 and in such case it is an enabling signal for the machine's operation, transmitted to it through the power circuits 18, 8.
  • the signal through the comparator 9 causes through the power circuit 19 the activation of the cooling device 4, 5.
  • this is translated into the operation of the fan 4 located in the proximity of the condenser 2, in the case of a water-cooled device in the opening of the solenoid valve 5 for supplying cooling water to the condenser itself.
  • the signal transmitted to the comparator 9 causes through the microprocessor 12, and thus through the power unit 18 and the power circuit 8, the stoppage of the machine, as well as the switching on of the luminous device 10.
EP91202185A 1990-09-12 1991-08-28 Elektronische Vorrichtung zur Regelung der Verflüssigung in einem Kältekreislauf einer Eisherstellungsmaschine Withdrawn EP0476739A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2143990 1990-09-12
IT02143990A IT1244316B (it) 1990-09-12 1990-09-12 Dispositivo elettronico di controllo della condensazione in un circuito frigorifero per macchina per la produzione di ghiaccio

Publications (1)

Publication Number Publication Date
EP0476739A1 true EP0476739A1 (de) 1992-03-25

Family

ID=11181815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91202185A Withdrawn EP0476739A1 (de) 1990-09-12 1991-08-28 Elektronische Vorrichtung zur Regelung der Verflüssigung in einem Kältekreislauf einer Eisherstellungsmaschine

Country Status (7)

Country Link
EP (1) EP0476739A1 (de)
AU (1) AU8358291A (de)
FI (1) FI914171A (de)
IE (1) IE913199A1 (de)
IT (1) IT1244316B (de)
PT (1) PT98937A (de)
ZA (1) ZA916953B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013016987A1 (de) * 2013-10-15 2015-04-16 Hartmut Higel Eiserzeuger

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318891A (en) * 1941-05-10 1943-05-11 Outboard Marine & Mfg Co Condensing radiator system for refrigerator installations
US2688849A (en) * 1951-09-13 1954-09-14 York Corp Safety control for water-cooled refrigerative systems
US3366167A (en) * 1966-08-01 1968-01-30 Carrier Corp Condensing units for refrigeration systems
US3415071A (en) * 1966-04-04 1968-12-10 Honeywell Inc Refrigeration condenser fan speed control system
DE1912613A1 (de) * 1969-03-12 1970-09-24 Sueddeutsche Kuehler Behr Vorrichtung zur selbsttaetigen Regelung von Geblaesen zur zwanglaeufigen Belueftung von Waermetauschern
US4075865A (en) * 1975-12-05 1978-02-28 Borg-Warner Corporation Apparatus for controlling condenser pressure in a refrigeration system
US4193781A (en) * 1978-04-28 1980-03-18 Mcquay-Perfex Inc. Head pressure control for heat reclaim refrigeration systems
US4325223A (en) * 1981-03-16 1982-04-20 Cantley Robert J Energy management system for refrigeration systems
US4498308A (en) * 1982-09-30 1985-02-12 Hussmann Store Equipment Limited Non-flooding remote air cooled condensers
US4944160A (en) * 1990-01-31 1990-07-31 Eaton Corporation Thermostatic expansion valve with electronic controller

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318891A (en) * 1941-05-10 1943-05-11 Outboard Marine & Mfg Co Condensing radiator system for refrigerator installations
US2688849A (en) * 1951-09-13 1954-09-14 York Corp Safety control for water-cooled refrigerative systems
US3415071A (en) * 1966-04-04 1968-12-10 Honeywell Inc Refrigeration condenser fan speed control system
US3366167A (en) * 1966-08-01 1968-01-30 Carrier Corp Condensing units for refrigeration systems
DE1912613A1 (de) * 1969-03-12 1970-09-24 Sueddeutsche Kuehler Behr Vorrichtung zur selbsttaetigen Regelung von Geblaesen zur zwanglaeufigen Belueftung von Waermetauschern
US4075865A (en) * 1975-12-05 1978-02-28 Borg-Warner Corporation Apparatus for controlling condenser pressure in a refrigeration system
US4193781A (en) * 1978-04-28 1980-03-18 Mcquay-Perfex Inc. Head pressure control for heat reclaim refrigeration systems
US4325223A (en) * 1981-03-16 1982-04-20 Cantley Robert J Energy management system for refrigeration systems
US4498308A (en) * 1982-09-30 1985-02-12 Hussmann Store Equipment Limited Non-flooding remote air cooled condensers
US4944160A (en) * 1990-01-31 1990-07-31 Eaton Corporation Thermostatic expansion valve with electronic controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013016987A1 (de) * 2013-10-15 2015-04-16 Hartmut Higel Eiserzeuger

Also Published As

Publication number Publication date
FI914171A0 (fi) 1991-09-04
IE913199A1 (en) 1992-02-25
IT9021439A0 (it) 1990-09-12
FI914171A (fi) 1992-03-13
AU8358291A (en) 1992-03-19
ZA916953B (en) 1992-05-27
PT98937A (pt) 1993-10-29
IT1244316B (it) 1994-07-08
IT9021439A1 (it) 1992-03-12

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