EP3412271B1 - Tragbare kühlvorrichtung mit kühlflüssigkeitsrückgewinnung - Google Patents

Tragbare kühlvorrichtung mit kühlflüssigkeitsrückgewinnung Download PDF

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Publication number
EP3412271B1
EP3412271B1 EP18176564.5A EP18176564A EP3412271B1 EP 3412271 B1 EP3412271 B1 EP 3412271B1 EP 18176564 A EP18176564 A EP 18176564A EP 3412271 B1 EP3412271 B1 EP 3412271B1
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EP
European Patent Office
Prior art keywords
cooling
refrigerant fluid
cooling apparatus
solenoid valve
way solenoid
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EP18176564.5A
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English (en)
French (fr)
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EP3412271A1 (de
Inventor
Pietro FUGAZZA
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Zorsol Srl
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Zorsol Srl
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G17/00—Coffins; Funeral wrappings; Funeral urns
    • A61G17/002—Coffins with cooling arrangements for the corpse
    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25D15/00—Devices not covered by group F25D11/00 or F25D13/00, e.g. non-self-contained movable devices
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B41/40—Fluid line arrangements
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/12—Portable refrigerators
    • 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
    • F25D31/001—Plate freezers

Definitions

  • the present invention relates to a portable cooling apparatus used for low temperature maintaining of a bier within a coffin.
  • cooling apparatuses comprising at least two distinct components exist: a main cooling circuit with relative compressor and at least one cooling plate constituting the evaporator of the cooling circuit.
  • a refrigerant fluid circulates, for instance freon; however, the use of other less polluting fluids, the so-called ozone-friends, has been spreading for some years.
  • the cooling plate usually comprises a serpentine of the roll-bond type pre-loaded with the refrigerant fluid and removably connected to the main cooling circuit by means of sealing and fast-coupling connections located on the inlet and outlet ducts of the serpentine.
  • the components of the main cooling circuit are re-usable for being connected to other cooling plates; conversely, the cooling plate is a disposable or single-use element of the cooling circuit since it is left in the coffin even after the final closure.
  • this gross modus operandi involves several drawbacks. Mainly this clearly involves a non-complete recovery of the refrigerant gas. Furthermore, there is an ecological impact, though minimized by the adoption of a last-generation gas, since the cut of the tube inevitably results in the loss of a large quantity of refrigerant fluid due to the difference in pressure between the liquid/gas in the tube and the environment pressure.
  • An object of the present invention is thus to totally recover the quantity of the left refrigerant fluid present in the cooling plate once the operative phase has ended. Said object is linked to the need of reducing the number of the expensive filling up operations to be periodically carried out in order to ensure a proper autonomy to the cooling apparatus, but also to ecological needs.
  • a further object is to prevent the dispersion of the refrigerant fluid in the environment during the detachment of the cooling plate from the cooling circuit.
  • the invention has the object of making the use of the cooling apparatus simpler and more practical, so that it can be activated not only directly by the user, but also through a remote control that can be operated by any fixed or mobile telecommunication device.
  • a further object is to provide a cooling apparatus able to keep track of the possible malfunctions, so as to keep memory of the problems encountered during the maintenance phase.
  • Yet a further object is to provide for the cooling apparatus to be equipped with an optimized casing for the transport phase of the same, duly considering the problems linked to weight, size and support for dragging the cooling apparatus itself.
  • an object of the present invention is to provide a simple and intuitive configuration to make the cooling apparatus of practical use by any user, even the non-specialized ones.
  • the solution idea underlying the present invention is to provide a cooling apparatus able to commutate between two alternative circuits to be used in the operative phase and in the liquid recovery phase from the cooling plate, respectively.
  • a cooling apparatus comprising a cooling circuit and a fast-coupling cooling plate, which further comprises a three-way solenoid valve on the delivery branch of the cooling plate. Said valve is controlled by a control electronic system of the functional states of said circuit.
  • the invention relates to a cooling apparatus (1) for coffins, comprising
  • the cooling circuit of the cooling apparatus comprises a first two-way solenoid valve and a second two-way solenoid valve on the delivery and return branches of said cooling plate respectively, to prevent the backflow of the refrigerant fluid in the actuating, operative and refrigerant liquid recovery phases.
  • the above unidirectional valve is a two-way solenoid valve placed between the three-way solenoid valve and the heat exchanger, to prevent the backflow of fluid in the recovery phase of said refrigerant fluid.
  • the cooling circuit of the cooling apparatus comprises a first pressure transducer, for detecting the minimum operative pressure of the cooling circuit.
  • a second pressure transducer is moreover comprised, for detecting the maximum operative pressure of said cooling circuit.
  • the cooling circuit of the cooling apparatus further comprises a pressure switch cooperating with the first pressure transducer, for the control of the correct coupling of the cooling plate with the cooling circuit itself.
  • the cooling apparatus further comprises an internal memory for storing the fault history suffered in the operative phase.
  • the cooling circuit comprises an internal circuit to the control unit for the remote control of said cooling apparatus by a fixed or portable control device.
  • a communication protocol is established between the cooling apparatus and an external device, such as for instance a mobile telecommunication device like a smartphone or a tablet with a dedicated platform and with a control logic governed by the pressure sensors.
  • an external device such as for instance a mobile telecommunication device like a smartphone or a tablet with a dedicated platform and with a control logic governed by the pressure sensors.
  • the cooling apparatus is installed within a portable casing.
  • Said portable casing is provided with a gripping handle and the arrangement of wheels at the support base of the casing itself.
  • the portable casing is further equipped with a telescopic handle to ensure easy dragging of the casing.
  • reference number 1 globally and schematically indicates a cooling apparatus realized according to the present invention.
  • the cooling apparatus 1 essentially comprises a cooling circuit 2 and a cooling plate 3.
  • the cooling plate 3 is preferably a disposable element to be placed within a coffin and connected by means of a delivery duct 4 and a return duct 5 to the cooling circuit 2.
  • the plate 3 can be made of biodegradable material or it can be made using a metal preform.
  • a serpentine 6 of the roll-bond type is placed, which is pre-loaded with the refrigerant fluid and removably connected to the main cooling circuit by means of first and second sealing and fast-coupling connections 7 and 8 located on delivery 4 and return 5 ducts, respectively, of the serpentine 6.
  • the cooling circuit 2 is essentially constituted by a compressor 9, which sends a refrigerant fluid in the gaseous state into a condenser 10 by an outlet duct of the compressor 9.
  • Said condenser 10 is cooled by a fan 12.
  • a duct 13 branches off, through which the refrigerant fluid reaches a collection reservoir 14.
  • the refrigerant fluid in the liquid form passes through a duct 15 towards a first two-way solenoid valve 16.
  • a duct 19 downstream of the expansion valve/s 18 there is a duct 19, which carries the fluid towards a three-way solenoid valve 20 that is configured, in the operative phase, to make the fluid pass through a first outlet 21 towards the delivery duct 4 of the cooling plate 3.
  • the return duct 5 of the cooling plate 3 branches off, which carries the refrigerant fluid towards a second two-way solenoid valve 22, which, open in the operative conditions, carries the fluid towards a duct 23 leading to a heat exchanger 24.
  • a control electronic system 33 is provided, which is incorporated and fed within the cooling apparatus 1.
  • Said control system 33 incorporates a control unit having inlets that receive electric signals from the various sensors and transducers of the cooling apparatus 1 and control outlets connected to the various actuators of the same apparatus, i.e. to the control solenoid valves.
  • Said control system is accessible at the outside through a connector 39 which acts as an external interconnection.
  • the compressor 9 is further provided with a service connection 26.
  • a first main transducer 27 is connected, which detects the minimum pressure during the whole operation of the cooling apparatus 1.
  • a second transducer 28 is further provided on the delivery connection of the compressor, to detect the maximum pressure during the whole operation of the cooling apparatus 1.
  • the first and second transducers 27 and 28 allow checking that the compressor 9 always works within a range of pre-established pressures. If the limits imposed are not respected, the control system automatically stops the compressor 9.
  • a pressure switch 29 is provided, which is connected on the duct 19 present between the expansion valve 18 and the three-way solenoid valve 20.
  • Said pressure switch 29 by detecting whether the pressure within the duct 19 is comprised between maximum and minimum design nominal values, detects whether there is a correct coupling of the cooling plate 3, by means of the first and second sealing and fast-coupling connections 7 and 8.
  • a second supplementary branch 30 of the cooling circuit 2 is provided between a second outlet 31 of the three-way valve 20 and the heat exchanger 24.
  • the supplementary branch is used for the "liquid recovery phase from the cooling plate".
  • a unidirectional valve 32 is located on said supplementary branch 30 .
  • a third solenoid valve in order to ensure better insulation from the outside, preventing air from entering the circuit, after having carried out the fluid recovery or in case a defective cooling plate 3 has been used.
  • a control electronic system is further present, which incorporates a control unit that controls the configuration of the above-mentioned valves, which the user can interface with, also by means of a fast-coupling connector accessible from the outside.
  • the refrigerant fluid initially undergoes a compression through the compressor 9.
  • the refrigerant fluid passes, as previously said, into the collection reservoir 14.
  • the fluid is directed towards the expansion valve 18.
  • the refrigerant fluid undergoes a change in pressure and a partial phase transition, reaching a partially gaseous and partially liquid condition.
  • the refrigerant fluid undergoes a new change in state passing from the liquid/gaseous form present at the first sealing and fast-coupling connection 7 of the serpentine 6 to a gaseous form at the second sealing and fast-coupling connection 8.
  • the refrigerant fluid is directed to the heat exchanger 24 and, thus, again to the compressor 9.
  • Said phase essentially consists in the isolation of the cooling plate 3 from the cooling circuit 2 and from the use of the compressor 9 analogously to a vacuum pump. Within the cooling plate the fluid thus undergoes a depression and returns towards the collection reservoir 14 in the liquid form.
  • the hermetic chamber of the compressor empties and takes up a negative pressure.
  • solenoid valves 16, 20, 22 and unidirectional valve 32 (or an alternative solenoid valve) is necessary to prevent the backflow of the fluid in the cooling plate 3 after the end of the recovery itself.
  • the circuit controls the activation and configuration of the valves as follows.
  • the compressor always remains in operation until the internal pressure of the serpentine 6 of the cooling plate 3 reaches a value equal to about - 0.60 bars, anyway a value below zero bar. In this way, a state of partial vacuum is produced.
  • the compressor 9 In a second intermediate phase the compressor 9 remains inactive for a predetermined period of time, for instance about 30 seconds.
  • the compressor is restarted, while the pressure returns to the value of about -0.60 bars.
  • the third phase of the refrigerant liquid recovery lasts in turn for a predetermined period of time, for example for about 40 seconds.
  • the cooling apparatus according to the present invention also allows operation for short periods under low pressure conditions and outside the design limits. However, at the end of an operation of this type, a check at the maintenance centers is recommended to ensure that this operation has not affected or damaged the mechanical or electronic components of the cooling apparatus itself.
  • the quantity of residual refrigerant fluid present in the cooling plate 3 at the end of the operative phase is totally recovered, with the detachment of the cooling plate 3 from the cooling circuit 2.
  • the result is a greatly reduced environmental impact, as well as a positive economic impact due to the recovery of the refrigerant fluid that would otherwise be lost.
  • the cooling apparatus 1 allows a simplified periodic maintenance procedure by the operator.
  • a further advantage of the invention consists in providing a circuit within a control system 33 for the remote control of the cooling apparatus 1 by an external fixed or portable control device.
  • a communication protocol is established between the cooling apparatus 1 and an external device, such as for instance a mobile telecommunication device like a smartphone or a tablet with a dedicated platform and with a control logic governed by the transducers 27 and 28.
  • an external device such as for instance a mobile telecommunication device like a smartphone or a tablet with a dedicated platform and with a control logic governed by the transducers 27 and 28.
  • the operator is therefore able to monitor and, if necessary, to remote act directly on the operation of the cooling circuit. For example, it is possible to start and stop the operation of the compressor 9.
  • the cooling apparatus 1 is installed within a portable casing 34.
  • Said portable casing provides a gripping handle 35 and the arrangement of wheels 36 at a supporting base 37 of the casing 34 itself.
  • the portable casing is further equipped with a telescopic handle 38 to ensure a simplified dragging of the casing.
  • the cooling apparatus is highly handy, thus simplifying the transport by the users, like a trolley.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (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)

Claims (11)

  1. Kühlvorrichtung (1) für Särge, mit
    - einem Kühlkreis (2) mit:
    ∘ einem Kompressor (9);
    ∘ einem Kondensator (10);
    ∘ einem oder mehreren Expansionsventilen (18);
    ∘ einem Wärmetauscher (24);
    ∘ einem Sammelbehälter (14);
    - einer Einwegkühlplatte (3), die in einen Sarg einlegbar ist und mit einer Schnellkupplung lösbar mit dem Kühlkreis (2) verbindbar ist, um einen Wärmeaustauschzustand mit dem Innern des Sarges auszuführen, wobei die Kühlplatte (3) aus mindestens einer Schlange (6) besteht, die in dem Sarg dauerhaft eingebaut ist und nach der endgültigen Schließung zurückgelassen wird und mit unter Druck stehendem Kühlfluid vorgefüllt ist;
    dadurch gekennzeichnet, dass der Kühlkreis (2) zusätzlich aufweist:
    - ein elektronisches Steuerungssystem (33), das eine Steuerungseinheit der Funktionszustände des Kühlkreises (2) enthält;
    - ein Drei-Wege-Magnetventil (20) an einer Zulaufleitung (4) der Kühlplatte (3), um eine von dem Steuerungssystem (33) gesteuerte Wiedergewinnung von Kühlfluid aus der Kühlplatte (3) am Ende der Betriebsphase der Kühlvorrichtung (1) zu erlauben; sowie ein Rückschlagventil (32), das zwischen dem Drei-Wege-Magnetventil (20) und dem Wärmetauscher (24) angeordnet ist, um den Rückfluss von Kühlfluid in der Wiedergewinnungsphase des Kühlfluides zu verhindern.
  2. Kühlvorrichtung (1) nach Anspruch 1, bei der der Kühlkreis (2) zusätzlich ein erstes Zwei-Wege-Magnetventil (16) und ein zweites Zwei-Wege-Magnetventil (22) jeweils an einer Leitung (15), die aus dem Sammelbehälter (14) austritt, und an einer Rücklaufleitung (5) der Kühlplatte (3) aufweist, um den Rückfluss des Kühlfluides in der Wiedergewinnungsphase des Kühlfluides zu verhindern.
  3. Kühlvorrichtung (1) nach Anspruch 1, bei der der Kühlkreis (2) zusätzlich ein Zwei-Wege-Magnetventil (32) aufweist, das zwischen dem Drei-Wege-Magnetventil (20) und dem Wärmetauscher (24) angeordnet ist, um den Rückfluss von Kühlfluid in der Wiedergewinnungsphase des Kühlfluides zu verhindern.
  4. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 3, bei der der Kühlkreis (2) zusätzlich einen ersten Druckaufnehmer (27) zum Ermitteln des minimalen Betriebsdruckes des Kühlkreises (2) aufweist.
  5. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 4, bei der der Kühlkreis (2) zusätzlich einen zweiten Druckaufnehmer (28) zum Ermitteln des maximalen Betriebsdruckes des Kühlkreises (2) aufweist.
  6. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 5, bei der der Kühlkreis (2) zusätzlich einen Druckschalter (29) für die Überwachung eines korrekten Anschlusses der Kühlplatte (3) an dem Kühlkreis (2) aufweist.
  7. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 6, gekennzeichnet dadurch, dass sie zusätzlich einen internen Speicher zum Speichern der in der Betriebsphase erlittenen Fehlerhistorie aufweist.
  8. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 7, gekennzeichnet dadurch, dass sie zusätzlich einen internen Kreis zu der Steuerungseinheit für die Fernsteuerung der Kühlvorrichtung (1) mittels eines feststehenden oder tragbaren Steuerungsgerätes aufweist.
  9. Kühlvorrichtung (1) nach einem der Ansprüche 1 bis 8, gekennzeichnet dadurch, dass sie in ein tragbares Gehäuse (34) eingebaut ist, das mit Rädern (36) für einen leichten Transport ausgestattet ist.
  10. Kühlvorrichtung (1) nach Anspruch 9, gekennzeichnet dadurch, dass sie zusätzlich einen teleskopischen Handgriff (38) für ein leichtes Ziehen des Gehäuses (34) aufweist.
  11. Verfahren zum Wiedergewinnen eines Kühlfluides aus einer Kühlplatte einer Kühlvorrichtung nach Anspruch 2, mit den folgenden Phasen:
    - Schließen des ersten Zwei-Wege-Magnetventils (16) und fortgesetzter Betrieb des Kompressors (9) bis zum Erreichen eines Innendruckes der Kühlplatte (3), der kleiner als Null bar ist, Absorbieren des größten Teiles des in der Kühlplatte (3) vorhandenen Kühlfluides;
    - Stoppen des Kompressors (9) ungefähr eine vorbestimmte Zeit lang, Erzeugen einer Vergasung von möglichen Resten des in der Kühlplatte (3) verbleibenden Kühlfluides und einer Druckstabilisierung entlang des Kühlkreises (2);
    - Wiederstarten des Kompressors (9), Zurückbringen des Druckes auf den vorgenannten kleiner als Null bar großen Wert, Umschalten des Betriebes des Drei-Wege-Magnetventiles (20), Schließen eines ersten Einlasses (19) und Öffnen eines zweiten Auslasses (31), Weiterreduzieren des Innendruckes des Kühlkreises (2);
    - Schließen des zweiten Zwei-Wege-Magnetventiles (22) und Stoppen des Kompressors (9).
EP18176564.5A 2017-06-07 2018-06-07 Tragbare kühlvorrichtung mit kühlflüssigkeitsrückgewinnung Active EP3412271B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000062432A IT201700062432A1 (it) 2017-06-07 2017-06-07 Gruppo frigorifero portatile con recupero di fluido frigorigeno

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EP3412271A1 EP3412271A1 (de) 2018-12-12
EP3412271B1 true EP3412271B1 (de) 2021-11-03

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EP (1) EP3412271B1 (de)
IT (1) IT201700062432A1 (de)
PT (1) PT3412271T (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549922A1 (de) * 1975-11-06 1977-05-18 Nethery Howard J Geraet zur kryostatischen praeoperativen behandlung von gangraenoesen extremitaeten
IT209042Z2 (it) 1985-12-20 1988-09-02 Zorsol Di Alberto Cipelletti & Gruppo di raffreddamento per cofani mortuari.
IT1264864B1 (it) * 1993-06-22 1996-10-17 Nuova Zorsol Srl Gruppo di raffreddamento per cofani mortuari con piastra di raffreddamento staccabile e recupero di fluido
US8082750B2 (en) * 2007-03-22 2011-12-27 Cps Products, Inc. Device for automatic processing of contaminated refrigerant from an air conditioning system
CN204027419U (zh) * 2014-07-17 2014-12-17 贵阳中化开磷化肥有限公司 一种便携式设备冷却蛇管清洗机结构
US10054346B2 (en) * 2015-10-27 2018-08-21 Mahle Aftermarket Italy S.P.A. Method for checking the presence of incondensable gases in climate recovery and charging station

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PT3412271T (pt) 2022-02-03
IT201700062432A1 (it) 2018-12-07

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