EP4246068B1 - Unité de cassette pour vitrines réfrigérées avec un système pour empêcher le passage d'air de l'extérieur - Google Patents

Unité de cassette pour vitrines réfrigérées avec un système pour empêcher le passage d'air de l'extérieur

Info

Publication number
EP4246068B1
EP4246068B1 EP23161923.0A EP23161923A EP4246068B1 EP 4246068 B1 EP4246068 B1 EP 4246068B1 EP 23161923 A EP23161923 A EP 23161923A EP 4246068 B1 EP4246068 B1 EP 4246068B1
Authority
EP
European Patent Office
Prior art keywords
reservoir
cassette unit
chamber
drip tray
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.)
Active
Application number
EP23161923.0A
Other languages
German (de)
English (en)
Other versions
EP4246068A1 (fr
Inventor
Fabio ORTAGGI
Moreno CAPOSALDO
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.)
Industrie Scaffalature Arredamenti ISA SpA
Original Assignee
Industrie Scaffalature Arredamenti ISA 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 Industrie Scaffalature Arredamenti ISA SpA filed Critical Industrie Scaffalature Arredamenti ISA SpA
Publication of EP4246068A1 publication Critical patent/EP4246068A1/fr
Application granted granted Critical
Publication of EP4246068B1 publication Critical patent/EP4246068B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/02—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors plug-in type
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/142—Collecting condense or defrost water; Removing condense or defrost water characterised by droplet guides
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/143—Collecting condense or defrost water; Removing condense or defrost water characterised by means to fix, clamp, or connect water pipes or evaporation trays
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans
    • F25D2321/1442—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans outside a refrigerator
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/145—Collecting condense or defrost water; Removing condense or defrost water characterised by multiple collecting pans
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/146—Collecting condense or defrost water; Removing condense or defrost water characterised by the pipes or pipe connections

Definitions

  • the present invention relates to a cassette unit for refrigerated display cabinets for food products and beverages.
  • a cassette unit is a complete refrigeration unit (finished machine) for the refrigeration of refrigerated displayers, such as refrigerated cabinets, refrigerated display cases, refrigerated counters, and the like.
  • the cassette unit comprises components (compressor, condenser, lamination element, evaporator, and control electronics) that are necessary for performing a thermodynamic compression refrigeration cycle. All components are mounted in a single self-supporting structural case/basement.
  • the cassette unit is equipped with intake conduits of external air and delivery conduits of cooled air. Such a unit is inserted into the refrigerated display cabinets, in correspondence with air inlet and outlet conduits of the refrigerated display cabinets that generate a flow of cold air in the refrigerated display cabinet for the storage of consumer products.
  • the components of the refrigeration system were located in different areas of the refrigerated display cabinet, depending on the function they were to perform.
  • the cold function evaporator
  • the hot function condenser + compressor
  • the cassette unit meets the ever-increasing demand of the market for eco-sustainability and easy disposal because components and materials in line with the need to have an increasingly reduced environmental impact were evaluated in the study of this solution.
  • FIGs. 2A, 2B, and 2C illustrate three examples of cassette units (100) installed on a roof, in a basement, and on a side of a refrigerated display cabinet (200), respectively.
  • Figs. 3A, 3B and 3C illustrate the cassette unit (100) of Fig. 2A .
  • the cassette unit (100) comprises a basement (1).
  • a body (2) is mounted on the basement (1) and defines a compartment wherein an evaporator (3) is arranged.
  • a compressor (4) and a condenser (5) are arranged on the basement (1) outside the body (2).
  • the evaporator (3) is a heat exchanger that generates cold
  • the condenser (5) is a heat exchanger that generates heat
  • the compressor (4) is a motor that generates heat as well. Therefore, the body (2) is made of heat-insulating material, and a cold zone insulated from the outside is generated inside the body (2).
  • Figs. 3A, 3B and 3C illustrate the specific case where the cassette unit (100) is to be installed on a roof of a refrigerated display cabinet.
  • an air intake opening (10) and an air delivery opening (11) are machined into the basement (1) under the body (2) and are interfaced with an interface of the refrigerated display cabinet to allow a flow of cold air inside the refrigerated display cabinet.
  • the cassette units that are to be installed in a basement or on the side of a refrigerated display cabinet have a different structure from that shown in Figs. 3A, 3B and 3C .
  • such cassette units have a body that defines a compartment wherein the evaporator is arranged. Therefore, if the cassette unit is to be installed in a basement of a refrigerated display cabinet, the air intake opening and the air delivery opening will be machined on an upper wall of the body. Conversely, if the cassette unit is to be installed on the side of a refrigerated display cabinet, the air intake opening and the air delivery opening will be machined on a side wall of the body.
  • ice is formed on the surface of the evaporator (3) due to the defrost deposit generated by the moisture of the treated air.
  • the ice on the surface of the evaporator acts as a thermal insulator, resulting in an efficiency loss in the heat exchange between the air and the evaporator. Therefore, the ice formed on the evaporator must be removed by means of a defrost system that performs a defrost cycle.
  • Such a defrost cycle can be performed according to different techniques:
  • the choice of one of the systems depends on several factors and variables, such as defrosting speed, energy consumption, and cost.
  • the ice deposited on the surface of the evaporator is dissolved in water by the heat brought to the evaporator by the overheated refrigerant.
  • Fig. 4 illustrates an assembly comprising an evaporator (3) and a drip tray (6) arranged under the evaporator to collect the liquid obtained from the defrosting of the evaporator.
  • the drip tray (6) has a drain conduit (60) to discharge the defrost liquid that drips onto the drip tray.
  • the drain conduit (60) has an outlet (61) from which the defrost water flows out and falls into a collection tank outside the compartment of the body (2).
  • the evaporator (3) is a heat exchanger, generally of finned pack type, comprising a plurality of plates (fins) (3) arranged parallel to each other and serpentine conduits (31) running through the plates (30).
  • the refrigerant flows inside the conduits (31), generating a heat exchange with the plates (30).
  • the drip tray (6) is put in communication with a hot zone of the cassette unit via the drain conduit (60), in the vicinity of the condenser (5), outside the body (2).
  • the drain conduit (60) of the drip tray (6) communicates with a collection tank (7) arranged outside the body (2), in the basement, in the vicinity of the compressor (4) and the condenser (5) in order to collect the defrost liquid.
  • a collection tank (7) arranged outside the body (2), in the basement, in the vicinity of the compressor (4) and the condenser (5) in order to collect the defrost liquid.
  • the water accumulated in the collection tank (7) will be eliminated by natural evaporation due to the combined effect of the positive temperature caused by the heat produced by the condenser (5) and of a forced ventilation obtained by means of a fan (50) arranged in the vicinity of the condenser (5) to increase the heat exchange between the condenser and the ambient air.
  • the cassette unit (100) according to the invention is substantially similar to the one shown in Figs. 3A, 3B and 3C .
  • the cassette unit (100) in accordance with claim 1 comprises:
  • the evaporator (3) of the cassette unit is substantially similar to the one shown in Fig. 4 .
  • the collection tank (7) of the defrost water which is disposed under the condenser (5), comprises two reservoirs: a first reservoir (70) under the outlet (61) of the drain conduit (60) of the drip tray, and a second reservoir (71) in overflow communication with the first reservoir (70).
  • the overflow between the first reservoir (70) and the second reservoir (71) can be achieved by means of a partition wall (72) that is bypassed by the water that fills the first reservoir (70) and overflows into the second reservoir (71).
  • the communication between the first reservoir and the second reservoir can be achieved by means of an overflow hole on the partition wall (72) at a distance from the bottom of the first reservoir.
  • the first reservoir (70) is smaller than the second reservoir (71).
  • the first reservoir (70) extends only in correspondence with the outlet (61) of the drain conduit of the drip tray.
  • the second reservoir (71) extends outside the body (2), under the condenser (5).
  • the second reservoir (71) has the shape of a rectangular tray.
  • the first reservoir (70) is disposed side by side with the second reservoir (71) towards the body (2).
  • said siphon means (9) is obtained by means of a partition wall (25) that protrudes inferiorly from a side wall (26) of the body (2) and is immersed in the liquid of the first reservoir (70), without touching the bottom of the first reservoir, whereby a slot (25a) is generated between the lower edge of the partition wall (25) and the bottom of the first reservoir (70)
  • the first reservoir (70) is divided into a first chamber (70a) and a second chamber (70b) in communication with each other through the slot (25a) below the partition wall (25).
  • the first chamber (70a) is located in the compartment of the body.
  • the second chamber (70b) is in communication with the outside of the body.
  • the siphon means (9) comprise the partition wall (25) of the side wall of the body that is immersed in the liquid of the first reservoir (70).
  • a one-way valve (8) is arranged in the first reservoir (70) so as to allow a passage of liquid from the drip tray (6) to the collection tank (7) and prevent a passage of air from the collection tank (7) to the drip tray (6).
  • the one-way valve (8) acts as a safety system, in case the first reservoir (70) is completely emptied of water.
  • the one-way valve (8) may comprise a floating wing (80).
  • the floating wing (80) is arranged between the bottom of the first reservoir (70) and the partition wall (25) of the side wall (26) of the body to allow a passage of water from the first chamber (70a) to the second chamber (70b) of the first reservoir and prevent a passage of air from the second chamber (70b) to the first chamber (70a) of the first reservoir.
  • the floating wing (80) can be attached to the bottom of the first reservoir (70).
  • the floating wing (80) When the first reservoir is empty and a flow of pressurized air is generated from the collection tank (7) towards the drip tray (6), the floating wing (80) is lifted by the air and goes in contact with the partition wall (25), blocking the passage of air.
  • said liquid flow compresses the floating wing (80) toward the bottom of the first reservoir, allowing the liquid to flow from the drip tray (6) to the collection tank (7).
  • the floating wing (80) can be attached to the outlet (61) of the drain conduit. In such a case, the floating wing normally closes the outlet (61) of the drain conduit to prevent the passage of air in the drain conduit.
  • the water flow pushes the diaphragm (8), which opens the outlet (61) to let the water flow out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)

Claims (9)

  1. Unité à cassettes (100) pour vitrines réfrigérées pour produits alimentaires et boissons ; ladite unité à cassettes (100) comprenant :
    - une base (1),
    - une coque (2) qui définit un compartiment dans lequel est disposé un évaporateur (3),
    - un compresseur (4) et un condenseur (5) disposés sur la base (1) à l'extérieur de la coque (2),
    - un orifice d'aspiration d'air (10) et un orifice de refoulement d'air (11) qui communiquent avec le compartiment défini par la coque (2) et destinés à s'interfacer avec une interface d'une vitrine réfrigérée pour permettre un flux d'air froid à l'intérieur de la vitrine réfrigérée,
    - un système de dégivrage apte à exécuter un cycle de dégivrage pendant lequel l'évaporateur (3) est réchauffé pour faire fondre la glace qui se forme sur l'évaporateur,
    - un plateau égouttoir (6) disposé au-dessous de l'évaporateur (3) pour recevoir l'eau de dégivrage qui s'écoule de l'évaporateur (3) pendant le cycle de dégivrage, et
    - une cuvette de collecte (7) disposée à l'extérieur de la coque (2), dans la zone de la base (1) à proximité du compresseur (4) et du condenseur (5) et en communication avec le plateau égouttoir (6) pour collecter l'eau de dégivrage ;
    caractérisée en ce que
    ladite cuvette de collecte (7) comprend deux réservoirs : un premier réservoir (70) disposé au-dessous d'une baie de sortie (61) d'un conduit de décharge (60) du plateau égouttoir et un second réservoir (71) qui communique à débordement avec le premier réservoir (70) ; et
    ladite unité à cassettes (100) comprend des moyens à siphon (9) qui comprennent une cloison de séparation (25) qui déborde inférieurement d'une paroi latérale (26) de la coque et qui sont immergés dans un liquide du premier réservoir (70), sans toucher le fond du premier réservoir, de manière que le premier réservoir (70) est partagé en une première chambre (70a) et en une seconde chambre (70b) qui communiquent entre elles via une fissure (25a) sous-jacente la cloison de séparation (25) ; où la première chambre (70a) se trouve dans le compartiment de la coque (2) sous la baie de sortie (61) du conduit de décharge (60) du plateau égouttoir (6) et la seconde chambre (70b) est en communication avec l'extérieur de la coque (2) ;
    lesdits moyens à siphon (9) étant prévus entre la première chambre (70a) et la seconde chambre (70b) du premier réservoir et configurés de manière à permettre un écoulement d'eau depuis la première chambre (70a) du premier réservoir vers la seconde chambre (70b) du premier réservoir et empêcher un passage d'air depuis l'externe de la coque (2), à travers la seconde chambre (70b) du premier réservoir (70).
  2. Unité à cassettes (100) selon la revendication 1, où ledit premier réservoir (70) est plus petit du second réservoir (71) et se déploie uniquement à hauteur de la baie de sortie (61) du conduit de décharge du plateau égouttoir.
  3. Unité à cassettes (100) selon la revendication 2, où ledit second réservoir (71) se déploie au dehors de la coque (2), au-dessous du condenseur (5) dans la zone de la base (1).
  4. Unité à cassettes (100) selon la revendication 2, où ledit second réservoir (71) se déploie au dehors de la coque (2), sous la base (1).
  5. Unité à cassettes (100) selon l'une quelconque des revendications précédentes, où le second réservoir (71) a la forme d'une cuvette rectangulaire et le premier réservoir (70) se trouve à côté du second réservoir (71) et se déploie vers la coque (2).
  6. Unité à cassettes (100) selon l'une quelconque des revendications précédentes, où ledit conduit de décharge (60) a la forme d'un canal et il est disposé dans le compartiment de la coque.
  7. Unité à cassettes (100) selon l'une quelconque des revendications précédentes, comprenant une vanne unidirectionnelle (8) disposée dans le premier réservoir (70) de manière à permettre un passage de liquide depuis le plateau égouttoir (6) vers la cuvette de collecte (7) et empêcher un passage d'air depuis la cuvette de collecte (7) vers le plateau égouttoir (6).
  8. Unité à cassettes (100) selon la revendication 7, où ladite vanne unidirectionnelle (8) comprend une ailette flottante (80).
  9. Unité à cassettes (100) selon l'une quelconque des revendications précédentes, où le plateau égouttoir (6) se trouve à une cote plus haute par rapport à la cuvette de collecte (7).
EP23161923.0A 2022-03-18 2023-03-14 Unité de cassette pour vitrines réfrigérées avec un système pour empêcher le passage d'air de l'extérieur Active EP4246068B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200005402 2022-03-18

Publications (2)

Publication Number Publication Date
EP4246068A1 EP4246068A1 (fr) 2023-09-20
EP4246068B1 true EP4246068B1 (fr) 2025-10-01

Family

ID=81927685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23161923.0A Active EP4246068B1 (fr) 2022-03-18 2023-03-14 Unité de cassette pour vitrines réfrigérées avec un système pour empêcher le passage d'air de l'extérieur

Country Status (1)

Country Link
EP (1) EP4246068B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29820730U1 (de) 1998-11-19 1999-05-06 Liebherr-Hausgeräte GmbH, 88416 Ochsenhausen Verdunstungsschale
KR20070093634A (ko) 2006-03-14 2007-09-19 엘지전자 주식회사 음료수용 냉장고의 열교환 장치
KR20110021923A (ko) 2008-05-23 2011-03-04 악티에볼라겟 엘렉트로룩스 냉각 기기
DE102009028775A1 (de) 2009-08-21 2011-02-24 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem Abtauwasserkanal und einem Siphon

Also Published As

Publication number Publication date
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