EP4206578A1 - A cooling device comprising an evaporator - Google Patents

A cooling device comprising an evaporator Download PDF

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Publication number
EP4206578A1
EP4206578A1 EP22199088.0A EP22199088A EP4206578A1 EP 4206578 A1 EP4206578 A1 EP 4206578A1 EP 22199088 A EP22199088 A EP 22199088A EP 4206578 A1 EP4206578 A1 EP 4206578A1
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EP
European Patent Office
Prior art keywords
evaporator
cooling device
present
passes
air duct
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Withdrawn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
EP22199088.0A
Other languages
German (de)
French (fr)
Inventor
Aydin Celik
Cagri Kocaturk
Gokhan CEREZCI
Cafer OZYURD
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP4206578A1 publication Critical patent/EP4206578A1/en
Withdrawn legal-status Critical Current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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/067—Evaporator fan units
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to a cooling device comprising an evaporator.
  • the cooling devices are composed of two compartments, one on top of the other, called fresh food and freezing compartments.
  • the freezing compartment is positioned above the fresh food compartment.
  • the freezing compartment is cooled by means of the evaporator wrapped around the compartment.
  • the evaporator is placed inside the rear wall.
  • the fresh food compartment is cooled by natural convection.
  • the hot and humid air rising along the door is cooled on the rear wall so as to leave its moisture.
  • Temperature-controlled compartments in the cooling devices are used more in recent years. In the application of such compartments, valve, direct or indirect cooling solutions are preferred. Moreover, integrated electronic control applications having a sensor are widely used. The temperature-controlled compartments create the need for extra capacity and/or efficient and distributed management of capacity. In this context, in addition to the factors mentioned above, it is observed that integrated evaporator solutions integrated with the air duct provide effective results in providing the desired capacities.
  • an evaporator having a rectangular plate, which is bent to form an open box at the front and back and placed on the inner surface of the freezing compartment, and tubes arranged in serpentine form on the parts of the plate corresponding to the freezing compartment side walls and ceiling.
  • a two-compartment cooling device comprising an evaporator which is arranged on the base, ceiling and rear wall of the freezing compartment and then extends to the fresh food compartment.
  • the aim of the present invention is the realization of a cooling device wherein efficient and homogeneous cooling conditions are obtained and the operation times of the compressor are decreased, thus providing energy savings.
  • the cooling device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises an air duct, and at least one double-serpentine evaporator which is disposed in the air duct, which has an inlet and an outlet, which is formed by bending a tube, wherein the refrigerant circulates and wherein the neighbor passes in the same plane extend in the same direction.
  • the lengths of the tubes between the evaporator passes are equal to each other.
  • the two side-by-side serpentine forms are symmetrical.
  • the lengths of the tubes between the evaporator passes extending in the same direction are not equal to each other, but different from each other.
  • the length of the tube between the passes of one of the serpentine form is shorter than the length of the tube between the passes of the other serpentine form.
  • said form continues successively in the vertical axis.
  • the evaporator pass distances are equal to each other.
  • the evaporator is used for cooling the fresh food compartment or the freezing compartment.
  • the evaporator is used for cooling the temperature-controlled compartment.
  • the evaporator is a finned tube evaporator. In this embodiment of the present invention, there are no fins at the center where the neighbor passes face each other.
  • the evaporator is an open tube evaporator.
  • the evaporator is a wire-on-tube evaporator.
  • the cooling device of the present invention comprises at least one fan (2), an air duct (1) and at least one evaporator (3) which is disposed in the air duct (1), which has an inlet and an outlet, which is formed by bending a tube (4) and wherein the refrigerant circulates, and the evaporator (3) is in the form of double serpentine in the same plane wherein the neighbor passes (6) extend in the same direction.
  • the refrigerant passes through the inlet of the evaporator (3), circulates the serpentine form on one side and reaches the outlet by passing to the other adjacent serpentine form, and in this case, the heat transfer surface area is further increased compared to evaporators where a single serpentine form is used in the same surface area.
  • the amount of escaping air is minimized and efficient and homogeneous cooling conditions and effective use of the heat transfer surface area are ensured.
  • energy consumption gains are provided by reducing compressor operating times.
  • the lengths of the tubes (4) between the evaporator (3) passes (6) are equal to each other.
  • the two side-by-side serpentine forms are symmetrical ( Figure 1 and Figure 2 ).
  • the lengths of the tubes (4) between the passes (6) extending in the same direction are not equal to each other, but different from each other.
  • the length of the tube (4) between the passes (6) of one of the serpentine form is shorter than the length of the tube (4) between the passes (6) of the other serpentine form.
  • said form continues successively in the vertical axis ( Figure 3 and Figure 4 ).
  • the ratio of the spacing between the passes (6) of both serpentine forms adjacent to each other to the pass (6) distance (d) is between 50% and 200%.
  • the evaporator (3) pass (6) distances (d) are equal to each other.
  • the evaporator (3) is used for cooling the fresh food compartment or the freezing compartment.
  • the evaporator (3) is used for cooling the temperature-controlled compartment.
  • the evaporator (3) is a finned tube evaporator.
  • fins (5) are provided on the tube (4) surrounding from above and below the middle section where there are no fins (5).
  • the ratio of the middle section where there are no fins (5) to the width of the evaporator (3) is between 0.05 and 0.20.
  • the ratio of the middle section where there are no fins (5) to the distance from the evaporator (3) to the air duct (1) walls is between 0.05 and 0.50.
  • the cooling device comprises a blowing duct (7) at the lower side of the air duct (1).
  • the ratio of the width of the blowing duct (7) to the width of the evaporator (3) is between 0.40 and 0.90.
  • the evaporator (3) is an open tube evaporator (3).
  • the evaporator (3) is a wire-on-tube evaporator (3).
  • the fresh food and/or freezing and/or temperature-controlled compartment, where the evaporator (3) is placed can be cooled efficiently, and capacity can be used efficiently for all cooling volumes.
  • Effective and homogeneous cooling conditions are provided by minimizing the amount of air escaping from the sides of the evaporator (3), and energy consumption savings are achieved by reducing compressor operating times with the effective use of heat transfer surface area.

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  • 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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The present invention relates to a cooling device comprising at least one fan (2), an air duct (1) and at least one evaporator (3) which is disposed in the air duct (1), which has an inlet and an outlet, which is formed by bending a tube (4) and wherein the refrigerant circulates, and the evaporator (3) is in the form of double serpentine in the same plane wherein the neighbor passes (6) extend in the same direction.

Description

  • The present invention relates to a cooling device comprising an evaporator.
  • The cooling devices are composed of two compartments, one on top of the other, called fresh food and freezing compartments. The freezing compartment is positioned above the fresh food compartment. The freezing compartment is cooled by means of the evaporator wrapped around the compartment. In the fresh food compartment, the evaporator is placed inside the rear wall. In conventional refrigerators, the fresh food compartment is cooled by natural convection. The hot and humid air rising along the door is cooled on the rear wall so as to leave its moisture.
  • Temperature-controlled compartments in the cooling devices are used more in recent years. In the application of such compartments, valve, direct or indirect cooling solutions are preferred. Moreover, integrated electronic control applications having a sensor are widely used. The temperature-controlled compartments create the need for extra capacity and/or efficient and distributed management of capacity. In this context, in addition to the factors mentioned above, it is observed that integrated evaporator solutions integrated with the air duct provide effective results in providing the desired capacities.
  • In the state of the art European Patent Application No. EP2370759 , an evaporator is disclosed, having a rectangular plate, which is bent to form an open box at the front and back and placed on the inner surface of the freezing compartment, and tubes arranged in serpentine form on the parts of the plate corresponding to the freezing compartment side walls and ceiling.
  • In the state of the art European Patent Application No. EP0547310 , a two-compartment cooling device is disclosed, comprising an evaporator which is arranged on the base, ceiling and rear wall of the freezing compartment and then extends to the fresh food compartment.
  • Another state of the art embodiment is explained in the Chinese Utility Model Document Application No. CN212378320 . According to this document single-row, two-piece evaporator with different fin spacing is provided at the rear side of the fresh food compartment and is used for cooing the fresh food compartment.
  • The aim of the present invention is the realization of a cooling device wherein efficient and homogeneous cooling conditions are obtained and the operation times of the compressor are decreased, thus providing energy savings.
  • The cooling device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises an air duct, and at least one double-serpentine evaporator which is disposed in the air duct, which has an inlet and an outlet, which is formed by bending a tube, wherein the refrigerant circulates and wherein the neighbor passes in the same plane extend in the same direction.
  • In an embodiment of the present invention, the lengths of the tubes between the evaporator passes are equal to each other. In this embodiment, the two side-by-side serpentine forms are symmetrical.
  • In another embodiment of the present invention, the lengths of the tubes between the evaporator passes extending in the same direction are not equal to each other, but different from each other. In this embodiment, among the two side-by-side serpentine forms, the length of the tube between the passes of one of the serpentine form is shorter than the length of the tube between the passes of the other serpentine form. In the embodiment of the present invention, said form continues successively in the vertical axis.
  • In an embodiment of the present invention, the evaporator pass distances are equal to each other.
  • In an embodiment of the present invention, the evaporator is used for cooling the fresh food compartment or the freezing compartment.
  • In an embodiment of the present invention, the evaporator is used for cooling the temperature-controlled compartment.
  • In an embodiment of the present invention, the evaporator is a finned tube evaporator. In this embodiment of the present invention, there are no fins at the center where the neighbor passes face each other.
  • In another embodiment of the present invention, the evaporator is an open tube evaporator.
  • In yet another embodiment of the present invention, the evaporator is a wire-on-tube evaporator.
  • By means of the present invention, the fresh food and/or freezing and/or temperature-controlled compartment, where the evaporator is placed, can be cooled efficiently, and capacity can be used efficiently for all cooling volumes. Effective and homogeneous cooling conditions are provided by minimizing the amount of air escaping from the sides of the evaporator, and energy consumption savings are achieved by reducing compressor operating times with the effective use of heat transfer surface area.
  • A cooling device realized in order to attain the aim the object of the present invention is illustrated in the attached figures, where:
    • Figure 1 - is the front view of an air duct and the evaporator therein.
    • Figure 2 - is the perspective view of the air duct and the evaporator therein.
    • Figure 3 - is the front view of an air duct and the evaporator therein in another embodiment of the present invention.
    • Figure 4 - is the perspective view of the air duct and the evaporator therein in another embodiment of the present invention.
  • The elements illustrated in the figures are numbered as follows:
    1. 1. Air duct
    2. 2. Fan
    3. 3. Evaporator
    4. 4. Tube
    5. 5. Fin
    6. 6. Pass
    7. 7. Blowing duct
  • The cooling device of the present invention comprises at least one fan (2), an air duct (1) and at least one evaporator (3) which is disposed in the air duct (1), which has an inlet and an outlet, which is formed by bending a tube (4) and wherein the refrigerant circulates, and the evaporator (3) is in the form of double serpentine in the same plane wherein the neighbor passes (6) extend in the same direction.
  • The refrigerant passes through the inlet of the evaporator (3), circulates the serpentine form on one side and reaches the outlet by passing to the other adjacent serpentine form, and in this case, the heat transfer surface area is further increased compared to evaporators where a single serpentine form is used in the same surface area. Thus, the amount of escaping air is minimized and efficient and homogeneous cooling conditions and effective use of the heat transfer surface area are ensured. Thus, energy consumption gains are provided by reducing compressor operating times.
  • In an embodiment of the present invention, the lengths of the tubes (4) between the evaporator (3) passes (6) are equal to each other. In this embodiment, the two side-by-side serpentine forms are symmetrical (Figure 1 and Figure 2).
  • In another embodiment of the present invention, the lengths of the tubes (4) between the passes (6) extending in the same direction are not equal to each other, but different from each other. In this embodiment, among the two side-by-side serpentine forms, the length of the tube (4) between the passes (6) of one of the serpentine form is shorter than the length of the tube (4) between the passes (6) of the other serpentine form. In the embodiment of the present invention, said form continues successively in the vertical axis (Figure 3 and Figure 4).
  • In an embodiment of the present invention, the ratio of the spacing between the passes (6) of both serpentine forms adjacent to each other to the pass (6) distance (d) is between 50% and 200%.
  • In an embodiment of the present invention, the evaporator (3) pass (6) distances (d) are equal to each other.
  • In an embodiment of the present invention, the evaporator (3) is used for cooling the fresh food compartment or the freezing compartment.
  • In an embodiment of the present invention, the evaporator (3) is used for cooling the temperature-controlled compartment.
  • In an embodiment of the present invention, the evaporator (3) is a finned tube evaporator. In this embodiment of the present invention, there are no fins (5) at the center where the neighbor passes (6) face each other. In this embodiment, fins (5) are provided on the tube (4) surrounding from above and below the middle section where there are no fins (5).
  • In a version of this embodiment of the present invention, the ratio of the middle section where there are no fins (5) to the width of the evaporator (3) is between 0.05 and 0.20.
  • In another version of this embodiment of the present invention, the ratio of the middle section where there are no fins (5) to the distance from the evaporator (3) to the air duct (1) walls is between 0.05 and 0.50.
  • In another embodiment of the present invention, the cooling device comprises a blowing duct (7) at the lower side of the air duct (1). In this embodiment of the present invention, the ratio of the width of the blowing duct (7) to the width of the evaporator (3) is between 0.40 and 0.90.
  • In another embodiment of the present invention, the evaporator (3) is an open tube evaporator (3).
  • In yet another embodiment of the present invention, the evaporator (3) is a wire-on-tube evaporator (3).
  • By means of the present invention, the fresh food and/or freezing and/or temperature-controlled compartment, where the evaporator (3) is placed, can be cooled efficiently, and capacity can be used efficiently for all cooling volumes. Effective and homogeneous cooling conditions are provided by minimizing the amount of air escaping from the sides of the evaporator (3), and energy consumption savings are achieved by reducing compressor operating times with the effective use of heat transfer surface area.

Claims (9)

  1. A cooling device comprising at least one fan (2), an air duct (1) and at least one evaporator (3) which is disposed in the air duct (1), which has an inlet and an outlet, which is formed by bending a tube (4) and wherein the refrigerant circulates, characterized by the evaporator (3) which is in the form of double serpentine in the same plane wherein the neighbor passes (6) extend in the same direction.
  2. A cooling device as in Claim 1, characterized by the evaporator (3) wherein the length of the tubes (4) between the passes (6) thereof are equal to each other.
  3. A cooling device as in Claim 1, characterized by the evaporator (3) wherein the lengths of the tubes (4) between the passes (6) extending in the same direction are different from each other.
  4. A cooling device as in any one of the Claims 1 to 3, characterized by the evaporator (3) wherein the ratio of the spacing between the passes (6) of both serpentine forms adjacent to each other to the pass (6) distance (d) is between 50% and 200%.
  5. A cooling device as in any one of the above claims, characterized by the evaporator (3) wherein the pass (6) distances (d) are equal to each other.
  6. A cooling device as in any one of the above claims, characterized by the finned tube evaporator(3).
  7. A cooling device as in Claim 6, characterized by the evaporator (3) wherein there are no fins (5) at the center where the neighbor passes (6) face each other.
  8. A cooling device as in Claim 7, characterized by the evaporator (3) wherein the ratio of the middle section where there are no fins (5) to the width of the evaporator (3) is between 0.05 and 0.20.
  9. A cooling device as in Claim 1 and 7, characterized by the evaporator (3) wherein the ratio of the middle section where there are no fins (5) to the distance from the evaporator (3) to the air duct (1) walls is between 0.05 and 0.50.
EP22199088.0A 2021-12-28 2022-09-30 A cooling device comprising an evaporator Withdrawn EP4206578A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR202121494 2021-12-28

Publications (1)

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EP4206578A1 true EP4206578A1 (en) 2023-07-05

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EP22199088.0A Withdrawn EP4206578A1 (en) 2021-12-28 2022-09-30 A cooling device comprising an evaporator

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547310A1 (en) 1991-12-17 1993-06-23 BOSCH-SIEMENS HAUSGERÄTE GmbH Two-temperature household refrigeration apparatus with a single cycle
JP2000274905A (en) * 1999-03-26 2000-10-06 Sanyo Electric Co Ltd Refrigerating circuit and refrigerator employing the same
DE102006015994A1 (en) * 2006-04-05 2007-10-11 BSH Bosch und Siemens Hausgeräte GmbH Refrigerating appliance with defrost heating
EP2370759A2 (en) 2008-12-30 2011-10-05 Arçelik Anonim Sirketi A cooling device comprising an evaporator
US20180292121A1 (en) * 2017-04-11 2018-10-11 Lg Electronics Inc. Refrigerator
CN212378320U (en) 2020-03-31 2021-01-19 松下电器研究开发(苏州)有限公司 Refrigerator with a door

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547310A1 (en) 1991-12-17 1993-06-23 BOSCH-SIEMENS HAUSGERÄTE GmbH Two-temperature household refrigeration apparatus with a single cycle
JP2000274905A (en) * 1999-03-26 2000-10-06 Sanyo Electric Co Ltd Refrigerating circuit and refrigerator employing the same
DE102006015994A1 (en) * 2006-04-05 2007-10-11 BSH Bosch und Siemens Hausgeräte GmbH Refrigerating appliance with defrost heating
EP2370759A2 (en) 2008-12-30 2011-10-05 Arçelik Anonim Sirketi A cooling device comprising an evaporator
US20180292121A1 (en) * 2017-04-11 2018-10-11 Lg Electronics Inc. Refrigerator
CN212378320U (en) 2020-03-31 2021-01-19 松下电器研究开发(苏州)有限公司 Refrigerator with a door

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