EP0021771A2 - Kühlsystem - Google Patents

Kühlsystem Download PDF

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Publication number
EP0021771A2
EP0021771A2 EP80302031A EP80302031A EP0021771A2 EP 0021771 A2 EP0021771 A2 EP 0021771A2 EP 80302031 A EP80302031 A EP 80302031A EP 80302031 A EP80302031 A EP 80302031A EP 0021771 A2 EP0021771 A2 EP 0021771A2
Authority
EP
European Patent Office
Prior art keywords
container
refrigeration system
heat exchanger
liquid
outlet
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Withdrawn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
EP80302031A
Other languages
English (en)
French (fr)
Other versions
EP0021771A3 (de
Inventor
Olaf Ralph Richardson
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.)
Booth Dispensers Ltd
Original Assignee
Booth Dispensers Ltd
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 Booth Dispensers Ltd filed Critical Booth Dispensers Ltd
Publication of EP0021771A2 publication Critical patent/EP0021771A2/de
Publication of EP0021771A3 publication Critical patent/EP0021771A3/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Withdrawn legal-status Critical Current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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/061—Walls with conduit means
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D31/00—Other cooling or freezing apparatus
    • F25D31/002—Liquid coolers, e.g. beverage cooler
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil

Definitions

  • This invention relates to a refrigeration system and more particularly, but not exclusively, to a refrigeration system for use in a drink dispensing machine.
  • a conventional refrigeration system for use in a drink dispensing machine comprises a compressor for circulating a refrigerant such as, for example, freon through a closed circuit including an evaporator coil and a heat exchanger.
  • the evaporator coil containing the refrigerant is used to extract heat either directly or indirectly from the liquid which is to form the drink by either winding a coil carrying said liquid in close touching contact with the evaporator coil or by using the evaporator coil to cool a water bath and form a bank of ice therein which is then utilised to cool the liquid from which the drink is to be formed by passing the liquid through a cooling coil mounted within the water bath.
  • the first direct type of refrigation system referred to above has the advantage of being a relatively compact and space-saving assembly, but when a large number of drinks are being served by-the drink dispensing machine during a short period of time, there is no facility to provide a reserve of "cold energy" which can be drawn upon. It is therefore necessary to ensure that the entire refrigeration system; including the compressor, the heat exchanger, the evaporator coil and the cooling coil for the liquid which is to form the drink; is of sufficient capacity to meet any maximum demand imposed upon the machine and thus it is usually necessary for such a system to have a larger capacity than the average demand imposed on the drink dispensing machine would normally require.
  • the second indirect type of refrigeration system utilising a water bath in which a bank of ice is formed as a reserve of "cold energy" does not suffer from the above disadvantage and thus a smaller compressor, evaporator coil and heat exchanger can theoretically be used in this system than in the direct type of refrigeration system to meet the same maximum short term demand.
  • the water bath in which the bank of ice is formed occupies a considerable space and it has also been found to be necessary to provide further ancillary equipment such as, some form of agitation means in the water bath to distribute the cold water therein evenly around the cooling coil for the liquid which is to form the drink.
  • the object of this invention is to provide a refrigeration system which possesses the advantages of the known systems and in which the disadvantages of said systems are alleviated.
  • a refrigeration system for use in a drink dispensing machine comprises a compressor, which is adapted to circulate a refrigerant through a closed circuit including an evaporator coil and a first heat exchanger; and a second heat exchanger assembly; comprising a container mounted in thermal contact with the evaporator .coil, said container having an inlet and an outlet formed therein through which the liquid to be cooled can flow, and baffle means mounted in the container for inhibiting the direct flow of liquid from the inlet to the outlet.
  • the container of the second heat exchanger assembly is mounted within the evaporator coil in thermal contact therewith.
  • the evaporator coil with the second heat exchanger assembly mounted therein is encapsulated within a layer or block of thermal insulating material.
  • the container of the second heat exchanger assembly is, preferably, a cylindrical container having closed ends.
  • the inlet is provided at or adjacent to one end of the container and the outlet is provided at or adjacent to the opposite end thereof so that liquid flowing therebetween flows along the major portion of the length of the container.
  • the inlet and/or the outlet are arranged so that the liquid flowing into the container is directed towards the periphery of the container and/or is withdrawn from the peripheral portion of the container.
  • the baffle means preferably, comprises one or more plates extending across substantially the full width of the container and each plate is provided at or adjacent to the periphery thereof with one or more slots through which the liquid can flow.
  • each slot is arranged to direct the liquid flowing therethrough radially outwardly and tangentially to the internal peripheral surface of the container.
  • the second heat exchanger assembly may comprise two containers connected in series, each being in thermal contact with the evaporator coil, the outlet of the first container being connected to the inlet of the second container.
  • the container of the second heat exchanger may have a carbonator unit mounted centrally therein.
  • a refrigeration system indicated generally at 10 for a drink dispensing machine (not shown) comprises a compressor 12, a heat exchanger 14 and a cooling fan 16.
  • a secondary heat exchanger assembly indicated generally at 18 is mounted adjacent to the compressor 12 and incorporates evaporator coils 20.
  • the secondary heat exchanger comprises two separate units, each unit consisting of a cylindrical container 22 having closed ends which is mounted within one of the evaporator coils 20 in thermal contact therewith.
  • the container 22 is formed of a good thermal conducting material, such as stainless steel, and is provided with inlet and outlet tubes 24 and 26 respectively.
  • the two containers 22 forming the secondary heat exchanger 18 are connected in series, that is to say, the outlet tube 26 of the first container 22 is connected to the inlet tube 24 of the second container 22.
  • Each of the containers 22 and the associated evaporator coil 20 are encapsulated within a layer or block of thermal insulating material 28."
  • the inlet tube 24 extends along the length of the container 22 and is provided at its end with an outlet aperture 30 which is arranged to direct water flowing therethrough into the container 22 towards the periphery thereof.
  • the outlet tube 26 is also provided with an aperture 32 which is arranged so that water withdrawn through the outlet tube 26 is taken from a point adjacent to the periphery of the container 22.
  • Each baffle plate 34 is mounted in the container 22 so as to extend across the full width thereof and the three plates 34 are disposed at spaced-apart positions along the length of the container 22 between the aperture 30 of the inlet tube 24 and the aperture 32 of the outlet tube 26.
  • Each baffle plate 34 is provided with one or more slots 36 extending radially inwardly from the periphery thereof and the sides of each slot 36 are angled so as to direct the water flowing therethrough radially outwardly and tangentially to the internal peripheral surface of the container 22.
  • the direction of the water flowing through the slots 36 in each baffle plate 34 is arranged so that the flow of water constitutes a helical or spiral flow along the internal peripheral surface of the container 22.
  • a temperature sensing device 38 is mounted in the container 22 adjacent to the periphery thereof and although any suitable thermal temperature sensing device can be used, it has been found that a thermistor is particularly suitable.
  • the compressor 12 circulates a refrigerant, such as freon, through a closed circuit including the heat exchanger 14 and the evaporator coils 20 of the secondary heat exchanger assembly 18.
  • the evaporator coils 20 cool the associated containers 22 and the water contained therein until a desired reduction in temperature is achieved, whereupon the temperature sensing device 38 senses that the desired temperature has been achieved, and the compressor 12 is switched off.
  • the compressor 12 can be arranged to remain in operation until the water in the container 22 adjacent to the periphery thereof actually freezes and a build-up of ice occurs on the internal peripheral surface of the container thereby forming a reservoir of "cold energy".
  • the water in the container 22 is drawn off through the outlet tube 26 to form a drink, the water is drawn through the aperture 32 from the coldest portion of the container 22, that is to say from a point adjacent to the periphery thereof.
  • baffle plates 34 ensure that the water flowing along the length of the container does not pass directly'from the aperture 30 of the inlet tube to the aperture 32 of the outlet tube.
  • the baffle plates 34 and the slots formed therein ensure that the water flowing through the container traverses as long a path as possible thereby subjecting this water to the maximum cooling effect.
  • the orientation and angle of the sides of the slots 36 in the baffle plates 34 are such as to cause the water flowing through the container to flow in a helical or spiral path along the periphery of the container 22 in order to subject the water to the maximum cooling effect.
  • a single evaporator coil 20 is utilised and this evaporator coil is disposed in a vertical rather than a horizontal plane.
  • the cylindrical container 22 having closed ends is mounted within the evaporator coil 20 and the coil 20 and the container 22 are encapsulated within a block of thermal insulating material 28.
  • a carbonator tank indicated generally at 40 is mounted centrally within the container 22 and three annular baffle plates 34 are mounted at spaced-apart positions in the external surface of the carbonator tank 40 and extend horizontally towards the internal surface of the container 22.
  • Each baffle plate 34 is provided with one or more slots 36 adjacent to the periphery thereof and once again, the side surfaces of each slot 36 are angled so as to direct the water flowing therethrough radially outwardly and tangentially to the internal peripheral surface of the container 22 thus producing a spiral flow of the water flowing through the slots along the internal peripheral surface of the container 22.
  • the carbonator tank 40 is provided with a float operated inlet valve assembly indicated generally at 42 to enable water to enter the carbonator tank 40 and this inlet valve assembly 42 is connected to the outlet tube 26.
  • the outlet tube 26 is disposed in the container 22 so that it draws water from the lower portion of the container and due to the vertical disposition of the container 22 the coldest water therein tends to collect in this lower portion.
  • the inlet tube 24 through which water is supplied to the container 22 is again provided at its end with an outlet aperture 30 which is arranged to direct water flowing therethrough towards the internal peripheral surface of the container 22.
  • the container 22 is again provided with a temperature sensing device 38 which is utilised for controlling the operation of the compressor of the refrigeration system.
  • this modified secondary heat exchanger is substantially the same as the operation of the system described with reference to Figures 1 and 2 of the drawings, the only minor difference being the introduction of the water to the inlet tube 24 at the top of the container 22 and the withdrawal of the cold water from the lower portion of the container 22 through the outlet tube 26.
  • probe devices are mounted in the container 22 adjacent to the periphery thereof to sense the build-up of ice on the interior thereof and are arranged once the ice has reached a desired thickness to de-activate the compressor 12.
  • the above described secondary heat exchanger assemblies form compact and space-saving units which possess the advantage of providing a reserve of "cold energy" in the form of a layer of ice formed on the internal peripheral surface of the container 22 which can be drawn upon during a period of maximum demand for cold drinks from the drink dispensing machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Devices For Dispensing Beverages (AREA)
EP80302031A 1979-06-20 1980-06-17 Kühlsystem Withdrawn EP0021771A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7921548 1979-06-20
GB7921548 1979-06-20

Publications (2)

Publication Number Publication Date
EP0021771A2 true EP0021771A2 (de) 1981-01-07
EP0021771A3 EP0021771A3 (de) 1981-03-18

Family

ID=10505986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302031A Withdrawn EP0021771A3 (de) 1979-06-20 1980-06-17 Kühlsystem

Country Status (6)

Country Link
EP (1) EP0021771A3 (de)
AU (1) AU5938880A (de)
CA (1) CA1143172A (de)
DK (1) DK259880A (de)
ES (1) ES492582A0 (de)
FI (1) FI801939A7 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200023100A1 (en) * 2017-02-24 2020-01-23 Qvanteq Ag Surface sealing for implants

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1972844A (en) * 1933-04-14 1934-09-04 Frigidaire Corp Refrigeration
US2638751A (en) * 1950-04-17 1953-05-19 Affiliated Gas Equipment Inc Water cooler
US2677254A (en) * 1950-10-24 1954-05-04 Arenz Donald Liquid cooler and dispenser
FR1035846A (fr) * 1951-04-12 1953-08-31 Fontaine d'eau fraîche
DE962168C (de) * 1952-04-06 1957-04-18 Siemens Ag Stationaere, fuer sich aufstellbare Vorrichtung zur Kuehlung von grossen Fluessigkeitsmengen, insbesondere von OEl, mittels Luft
GB901450A (en) * 1957-11-26 1962-07-18 Pormor Ltd Improvements in or relating to a method and apparatus for cooling liquids
FR1201989A (fr) * 1957-12-28 1960-01-07 Althos S A Appareil évaporateur pour les installations frigorifiques destinées à refroidir des liquides en général et plus particulièrement de l'eau, de la bière et autres boissons
GB903955A (en) * 1960-01-01 1962-08-22 Dessindecor Ltd In-line draught liquid heater and cooler
LU40639A1 (de) * 1961-09-26 1961-11-27
US3475922A (en) * 1967-07-31 1969-11-04 Westinghouse Electric Corp Liquid cooling chamber
US3479839A (en) * 1967-07-31 1969-11-25 Westinghouse Electric Corp Freezable water cooling chamber
US3820214A (en) * 1971-02-19 1974-06-28 Westinghouse Electric Corp Method of fabricating a cooling chamber for a water cooler
US3788090A (en) * 1972-04-05 1974-01-29 Fluid Device Corp Fluid control systems
GB1473188A (en) * 1975-05-28 1977-05-11 Boc Linde Refrigeration Ltd Heat exchangers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200023100A1 (en) * 2017-02-24 2020-01-23 Qvanteq Ag Surface sealing for implants

Also Published As

Publication number Publication date
ES8102335A1 (es) 1980-12-16
ES492582A0 (es) 1980-12-16
EP0021771A3 (de) 1981-03-18
AU5938880A (en) 1981-01-08
FI801939A7 (fi) 1981-01-01
DK259880A (da) 1980-12-21
CA1143172A (en) 1983-03-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR IT NL SE

PUAL Search report despatched

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Effective date: 19810821

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RICHARDSON, OLAF RALPH