WO2020057834A1 - A rotary heat exchanger - Google Patents

A rotary heat exchanger Download PDF

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Publication number
WO2020057834A1
WO2020057834A1 PCT/EP2019/070631 EP2019070631W WO2020057834A1 WO 2020057834 A1 WO2020057834 A1 WO 2020057834A1 EP 2019070631 W EP2019070631 W EP 2019070631W WO 2020057834 A1 WO2020057834 A1 WO 2020057834A1
Authority
WO
WIPO (PCT)
Prior art keywords
header
heat exchanger
cabinet
rotary heat
mounting means
Prior art date
Application number
PCT/EP2019/070631
Other languages
French (fr)
Inventor
Burak COBAN
Vasi Kadir Ertis
Funda ERDEM
Unsal KAYA
Mert GUNEY
Mutlu IPEK
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2020057834A1 publication Critical patent/WO2020057834A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/006—Self-contained movable devices, e.g. domestic refrigerators with cold storage accumulators

Definitions

  • the present invention relates to a rotary heat exchanger which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet.
  • Refrigerators especially enable the foodstuffs to be cooled, thus prolonging the shelf lives thereof.
  • the refrigerators generally comprise a cabinet wherein the foodstuffs to be cooled or kept cool are placed.
  • the temperature in said cabinet is generally needed to be constant. However, situations such as the door of said cabinet being opened/closed by the user, placement into the cabinet of a foodstuff at a temperature different than the balance temperature of the cabinet, etc. cause fluctuations in the cabinet temperature.
  • phase changing materials are used to prevent the temperature fluctuations in the refrigerator cabinet. Said materials draw heat from inside the cabinet in case the temperature in the cabinet tends to increase, thus cooling down the cabinet.
  • the phase change temperature of said phase changing material is around the balance temperature required in the cabinet. Thus, the excess heat transferred into the cabinet is spent for the phase change temperature, or in other words latent heat of said material.
  • the material absorbing the excess heat changes from solid phase to liquid phase; however, the temperature of the material remains the same. Thus, the temperature fluctuations in the cabinet are prevented.
  • phase changing materials are placed at an area in the cabinet as block masses.
  • said blocks can draw the heat efficiently only from their immediate surroundings. This results in increasing the time required for obtaining a homogeneous heat distribution in the cabinet.
  • forced convection can be realized in the cabinet by means of a fan; however, this does not provide a sufficiently quick balancing.
  • the aim of the present invention is the realization of a rotary heat exchanger which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet.
  • Another aim of the present invention is the realization of a rotary heat exchanger which enables the interior temperature of the cabinet to be kept constant.
  • Figure 1 is a view of the rotary heat exchanger.
  • Figure 2 is the cross-sectional view of the fins.
  • the rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet comprises
  • the rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet comprises at least one mounting means (2) for the mounting thereof.
  • the rotary heat exchanger (1) comprises at least two mounting means (2).
  • Each of said mounting means (2) forms a rotational axis.
  • At least one header (3) is connected to each of the mounting means (2) so as to rotate around the rotational axis formed by the latter.
  • the header (3) has a hollow, closed form. Said form is preferable cylindrical. Phase changing material is filled into the space in the header (3).
  • the header (3) enables the interior temperature of the cabinet to be kept constant.
  • At least one fin (4) is connected to the header (3).
  • the fin (4) rotates together with the header (3) and moves the air therearound.
  • a plurality of fins (4) are arranged on the circular cross-section of the flat surface of the header (3) such that the angles between the fins (4) are equal to each other. That the angles between the fins (4) are equal to each other prevents any imbalance during the rotation.
  • the header (3) is driven by the drive unit (5) by means of a shaft (51).
  • the header (3) and hence the fins (4) rotate by means of this drive.
  • the fins (4) have a hollow, closed cross-section.
  • phase changing material is filled into the space in the fins (4).
  • the fins (4) can absorb the excess heat.
  • the rotary heat exchanger (1) of the present invention comprises at least two mounting means (2).
  • a header (3) is connected to each of said mounting means (2).
  • a plurality of fins (4) are placed in between said two headers (3).
  • the space in the fins (4) opens into the space in the headers (3).
  • the volume formed by the headers (3) and the fins (4) is a closed volume. Therefore, the need for supplying or circulating the phase changing material is eliminated.
  • the phase changing material in the rotary heat exchanger (1) of the present invention leaves its excess heat by means of an evaporator, which emits cold air into the cabinet, so as to change to the solid phase.
  • the fins (4) are rotated by the drive unit (5) and the air in the cabinet is moved.
  • the excess heat in the air hitting the fins (4) and the headers (3) is drawn by means of the phase changing material in said components. Since this heat is spent by the phase changing material to change phase, the temperature of said material remains constant while changing phase.
  • the interior temperature of the cabinet is enabled to be kept constant.
  • the fin (4) moving the air in the cabinet not only the air around the rotary heat exchanger (1) but also the entire air in the cabinet is processed. Consequently, a homogeneous heat distribution is provided in the cabinet in a short time.
  • each of the arms of said Y shape forms a rotational axis.
  • the header (3) is in the form of a hollow, regular polygonal prism.

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The present invention relates to a rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet, characterized by the header (3) which has a hollow closed form and contains phase changing material in this space, and the fin (4) which has a hollow closed cross-section and contains phase changing material in this space.

Description

A ROTARY HEAT EXCHANGER
Technical Field
The present invention relates to a rotary heat exchanger which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet.
Prior Art
Refrigerators especially enable the foodstuffs to be cooled, thus prolonging the shelf lives thereof. The refrigerators generally comprise a cabinet wherein the foodstuffs to be cooled or kept cool are placed. The temperature in said cabinet is generally needed to be constant. However, situations such as the door of said cabinet being opened/closed by the user, placement into the cabinet of a foodstuff at a temperature different than the balance temperature of the cabinet, etc. cause fluctuations in the cabinet temperature.
In the state of the art, phase changing materials (PCM) are used to prevent the temperature fluctuations in the refrigerator cabinet. Said materials draw heat from inside the cabinet in case the temperature in the cabinet tends to increase, thus cooling down the cabinet. The phase change temperature of said phase changing material is around the balance temperature required in the cabinet. Thus, the excess heat transferred into the cabinet is spent for the phase change temperature, or in other words latent heat of said material. The material absorbing the excess heat changes from solid phase to liquid phase; however, the temperature of the material remains the same. Thus, the temperature fluctuations in the cabinet are prevented.
The state of the art phase changing materials are placed at an area in the cabinet as block masses. When the thermal convection in the cabinet is only natural convection, said blocks can draw the heat efficiently only from their immediate surroundings. This results in increasing the time required for obtaining a homogeneous heat distribution in the cabinet. In order to prevent this problem, forced convection can be realized in the cabinet by means of a fan; however, this does not provide a sufficiently quick balancing.
In the state of the United States Patent Document No. US4934448, a rotary heat exchanger is disclosed. The refrigerant fluid can be passed through the fins of said heat exchanger and thus a forced thermal convection is realized.
None of the state of the art documents provides a solution of the present invention which enables the cabinet temperature to be kept constant.
Brief Description of the Invention
The aim of the present invention is the realization of a rotary heat exchanger which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet.
Another aim of the present invention is the realization of a rotary heat exchanger which enables the interior temperature of the cabinet to be kept constant.
Detailed Description of the Invention
The rotary heat exchanger realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 is a view of the rotary heat exchanger.
Figure 2 is the cross-sectional view of the fins.
The elements illustrated in the figures are numbered as follows:
  1. Rotary heat exchanger
  2. Mounting means
  3. Header
  4. Fin
  5. Drive unit
    51. Shaft
The rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet comprises
  • at least one mounting means (2) for the mounting thereof,
  • at least one header (3) which can rotate around a rotational axis formed by the mounting means (2),
  • at least one fin (4) which is connected to the header (3), which rotates together with the header (3) and which moves the air therearound while rotating, and
  • at least one drive unit (5) which drives the header (3), thus rotates the header (3) via a shaft (51).
The rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet comprises at least one mounting means (2) for the mounting thereof. In the preferred embodiment of the present invention, the rotary heat exchanger (1) comprises at least two mounting means (2). Each of said mounting means (2) forms a rotational axis. At least one header (3) is connected to each of the mounting means (2) so as to rotate around the rotational axis formed by the latter. In the preferred embodiment of the present invention, the header (3) has a hollow, closed form. Said form is preferable cylindrical. Phase changing material is filled into the space in the header (3). Thus, the header (3) enables the interior temperature of the cabinet to be kept constant. At least one fin (4) is connected to the header (3). The fin (4) rotates together with the header (3) and moves the air therearound. In the preferred embodiment of the present invention, a plurality of fins (4) are arranged on the circular cross-section of the flat surface of the header (3) such that the angles between the fins (4) are equal to each other. That the angles between the fins (4) are equal to each other prevents any imbalance during the rotation. The header (3) is driven by the drive unit (5) by means of a shaft (51). The header (3) and hence the fins (4) rotate by means of this drive.
In the preferred embodiment of the present invention, the fins (4) have a hollow, closed cross-section. In this embodiment, phase changing material is filled into the space in the fins (4). Thus, while moving the air, the fins (4) can absorb the excess heat.
In the preferred embodiment of the present invention, the rotary heat exchanger (1) of the present invention comprises at least two mounting means (2). A header (3) is connected to each of said mounting means (2). A plurality of fins (4) are placed in between said two headers (3). Preferably, the space in the fins (4) opens into the space in the headers (3). Thus, the filling of the phase changing material into both headers (3) and fins (4) is facilitated. The volume formed by the headers (3) and the fins (4) is a closed volume. Therefore, the need for supplying or circulating the phase changing material is eliminated.
The phase changing material in the rotary heat exchanger (1) of the present invention leaves its excess heat by means of an evaporator, which emits cold air into the cabinet, so as to change to the solid phase. When heat is transferred into the cabinet, the fins (4) are rotated by the drive unit (5) and the air in the cabinet is moved. The excess heat in the air hitting the fins (4) and the headers (3) is drawn by means of the phase changing material in said components. Since this heat is spent by the phase changing material to change phase, the temperature of said material remains constant while changing phase. Thus, the interior temperature of the cabinet is enabled to be kept constant. Moreover, by means of the fin (4) moving the air in the cabinet, not only the air around the rotary heat exchanger (1) but also the entire air in the cabinet is processed. Consequently, a homogeneous heat distribution is provided in the cabinet in a short time.
In an embodiment of the present invention, it is possible to use a single Y-shape mounting means (2). Each of the arms of said Y shape forms a rotational axis.
In another embodiment of the present invention, the header (3) is in the form of a hollow, regular polygonal prism.

Claims (6)

  1. A rotary heat exchanger (1) which forces the heat transfer fluid in the cabinet so as to homogeneously distribute the heat in the cabinet, comprising
    - at least one mounting means (2) for the mounting thereof,
    - at least one header (3) which can rotate around a rotational axis formed by the mounting means (2),
    - at least one fin (4) which is connected to the header (3), which rotates together with the header (3) and which moves the air therearound while rotating, and
    - at least one drive unit (5) which drives the header (3), thus rotates the header (3) via a shaft (51),
    characterized by
    - the header (3) which has a hollow closed form and contains phase changing material in this space, and
    - the fin (4) which has a hollow closed cross-section and contains phase changing material in this space.
  2. A rotary heat exchanger (1) as in Claim 1, comprising
    - at least two mounting means (2),
    - at least two headers (3), each being connected to each of said mounting means (2), and
    - a plurality of fins (4) which are disposed in between said two headers (3).
  3. A rotary heat exchanger (1) as in Claim 1, comprising a plurality of fins (4) which are arranged on the circular cross-section of the flat surface of the header (3) such that the angles between the fins (4) are equal to each other.
  4. A rotary heat exchanger (1) as in Claim 1, comprising the fin (4) with the space therein opening into the space in the headers (3).
  5. A rotary heat exchanger (1) as in Claim 1, comprising a single Y-shaped mounting means (2).
  6. A rotary heat exchanger (1) as in Claim 1, comprising the header (3) which is in the form of a hollow regular polygonal prism.
PCT/EP2019/070631 2018-09-19 2019-07-31 A rotary heat exchanger WO2020057834A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2018/13429 2018-09-19
TR201813429 2018-09-19

Publications (1)

Publication Number Publication Date
WO2020057834A1 true WO2020057834A1 (en) 2020-03-26

Family

ID=67514644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/070631 WO2020057834A1 (en) 2018-09-19 2019-07-31 A rotary heat exchanger

Country Status (1)

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WO (1) WO2020057834A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112934491A (en) * 2021-01-29 2021-06-11 塔里木大学 Separation device for producing oil from walnut endophytic bacterium HB1310 fermentation cotton stalk hydrolysis sugar liquid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2602933A1 (en) * 1975-01-28 1976-07-29 Nissan Motor DEVICE FOR FLUID TRANSFER WITH HEAT EXCHANGE PROPERTY
US4401151A (en) * 1979-07-26 1983-08-30 Wilhelm Gebhardt Gmbh Device for pumping a liquid or gaseous current medium
US4934448A (en) 1988-02-09 1990-06-19 Nissan Motor Co., Ltd. Rotary heat exchanger
GB2422003A (en) * 2005-01-06 2006-07-12 Ford Global Tech Llc Combined fan and heat exchanger
US20160091255A1 (en) * 2013-02-07 2016-03-31 John Carl Bastian Rotary high density heat exchanger
US20170248347A1 (en) * 2016-02-29 2017-08-31 Nativus, Inc. Rotary heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2602933A1 (en) * 1975-01-28 1976-07-29 Nissan Motor DEVICE FOR FLUID TRANSFER WITH HEAT EXCHANGE PROPERTY
US4401151A (en) * 1979-07-26 1983-08-30 Wilhelm Gebhardt Gmbh Device for pumping a liquid or gaseous current medium
US4934448A (en) 1988-02-09 1990-06-19 Nissan Motor Co., Ltd. Rotary heat exchanger
GB2422003A (en) * 2005-01-06 2006-07-12 Ford Global Tech Llc Combined fan and heat exchanger
US20160091255A1 (en) * 2013-02-07 2016-03-31 John Carl Bastian Rotary high density heat exchanger
US20170248347A1 (en) * 2016-02-29 2017-08-31 Nativus, Inc. Rotary heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112934491A (en) * 2021-01-29 2021-06-11 塔里木大学 Separation device for producing oil from walnut endophytic bacterium HB1310 fermentation cotton stalk hydrolysis sugar liquid
CN112934491B (en) * 2021-01-29 2022-05-24 塔里木大学 Separation device for producing oil from walnut endophytic bacterium HB1310 fermentation cotton stalk hydrolysis sugar liquid

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