EP2038590A1 - Régénérateur de type rotatif et réfrigérateur magnétique employant le régénérateur - Google Patents

Régénérateur de type rotatif et réfrigérateur magnétique employant le régénérateur

Info

Publication number
EP2038590A1
EP2038590A1 EP06812562A EP06812562A EP2038590A1 EP 2038590 A1 EP2038590 A1 EP 2038590A1 EP 06812562 A EP06812562 A EP 06812562A EP 06812562 A EP06812562 A EP 06812562A EP 2038590 A1 EP2038590 A1 EP 2038590A1
Authority
EP
European Patent Office
Prior art keywords
amr
magnet
hole
regenerator
transfer fluid
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Withdrawn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
EP06812562A
Other languages
German (de)
English (en)
Other versions
EP2038590A4 (fr
Inventor
Seung Hoon Shin
Dong Kwan Lee
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP2038590A1 publication Critical patent/EP2038590A1/fr
Publication of EP2038590A4 publication Critical patent/EP2038590A4/fr
Withdrawn legal-status Critical Current

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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • 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
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
    • F25B2321/0022—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a rotating or otherwise moving magnet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a regenerator using a rotation type magnet member and an active magnetic regenerator (hereinafter referred to as "AMR"), and a magnetic refrigerator using the same.
  • AMR active magnetic regenerator
  • a temperature of a magnetic refrigerant material which has a magnetic field applied thereto as a magnet moves to a right increases from a dotted line to a solid line
  • the temperature of the magnetic refrigerant material drops from the dotted line to the solid line as a heat transfer fluid at a cold side moves to a hot side, and the heat transfer fluid is gradually heated to be hot at a right outlet, thereby emitting heat by an heat exchange with the hot side
  • the temperature of the magnetic refrigerant material which has a magnetic field erased as the magnet moves to a left decreases more from the dotted line to the solid line
  • the magnetic refrigerant material Due to the movement of the heat transfer fluid from the hot side to the cold side, the magnetic refrigerant material is heated from the temperature of the dotted line to that of the solid line, and the heat transfer fluid is relatively cooled to be cold at a left outlet, thereby absorbing heat from the cold side to cool the cold side.
  • a temperature of the heat transfer fluid heated in a first AMR bed 1OA in the magnetic field is dropped to an atmospheric temperature by a hot-side heat exchanger 70 and the heat transfer fluid is then passed through the second AMR bed 1OB.
  • a magnetic refrigerant material layer 16 has a low temperature, the temperature of the heat transfer fluid drops while passing through the magnetic refrigerant material layer 16.
  • the heat transfer fluid having the low temperature passes through a cold-side heat exchanger 60 and then enters the first AMR bed 1OA to be heated.
  • the heat transfer fluid then flows to the hot- side heat exchanger 70, the second AMR bed 1OB and the cold-side heat exchanger 60 to complete the one cycle.
  • a channel switch 30 reverses the flow of the heat transfer fluid to generate a reverse cycle.
  • an AMR bed 10 includes a container 12 of a cylinder type, a plurality of magnetic refrigerant material layers 16 stored inside the container 12, and meshes 14.
  • the container 12 includes heat transfer fluid inlet/outlet ports 18a and 18b, which may be connected to the heat exchange tube 32 or 34. Disclosure of Invention
  • a rotational regenerator comprising: a first AMR and a second AMR including a magnetocaloric material for passing through a flow of a heat transfer fluid; a magnet; and a magnet rotating assembly for applying or erasing a magnetic field by disposing the magnet at the first AMR or the second AMR, wherein each of the first AMR and the second AMR comprises an AMR bed disposed in a lengthwise direction of a through-hole being filled up with the magnetocaloric material, and cold-side and hot-side AMR nozzles coupled to the AMR bed and connected to the through-hole, and wherein one of the AMR nozzles includes a distribution chamber for uniformly distributing the heat transfer fluid to an entirety of a cross-section of the through-hole.
  • a magnetic refrigerator comprising: a first AMR and a second AMR including a magnetocaloric material for passing through a flow of a heat transfer fluid; a magnet; a magnetic rotating assembly for applying or erasing a magnetic field by disposing the magnet at the first AMR or the second AMR; and cold- side and hot-side heat exchangers thermally connected to the first AMR and the second AMR, wherein each of the first AMR and the second AMR comprises an AMR bed disposed in a lengthwise direction of a through-hole being filled up with the magnetocaloric material, and cold-side and hot-side AMR nozzles coupled to the AMR bed and connected to the through-hole, and wherein one of the AMR nozzles includes a distribution chamber for uniformly distributing the heat transfer fluid to an entirety of a cross-section of the through-hole.
  • the magnet rotating assembly comprises a body for supporting the magnet disposed upper and lower sides of the first AMR or the second AMR, a rotating plate for supporting the body, and a rotational power transfer member for transferring a rotational power to the rotating plate, and wherein each of the first AMR and the second AMR is supported in a horizontal direction perpendicular to a vertical tower.
  • the distribution chamber is connected to a first end of the AMR nozzle, and an inlet/outlet is formed at a second end thereof, and wherein the inlet/ outlet of the AMR nozzle is right-angled such that the inlet/outlet is on a same plane with the first AMR and the second AMR, thereby reducing a radius of a rotation by preventing an interference with the rotation of the magnet.
  • AMR nozzle a leakage of the magnetocaloric material and the heat transfer fluid is prevented.
  • the through-hole comprises an upper through-hole and a lower through-hole divided by a ribbed compartment, a distortion of the AMR bed due to a pressure of the heat transfer fluid is prevented.
  • regenerator and the magnetic refrigerator using the same in accordance with the present invention have following advantages.
  • the magnetic refrigerator since the magnetic refrigerator includes the distribution chamber having a size almost identical to that of the cross-section of the magnetocaloric material of the AMR bed, the heat transfer fluid flows uniformly throughout the magnetocaloric material, resulting in a suppression of the corrugation formed by partial flow thereof to improve the heat exchange efficiency.
  • the heat exchange efficiency is improved by employing the structure wherein the heat transfer fluid always passes through the magnetocaloric material.
  • an adiabatic state is achieved by employing the plastic AMR and by preventing an exposure of the magnetocaloric material to outside, resulting in the improvement of the heat exchange efficiency.
  • the through-hole of the AMR bed has the upper and the lower through-holes divided by the ribbed compartment, the distortion of a shape of the AMR due to the pressure of the heat transfer fluid is prevented. Even when the distortion occurs, the heat transfer fluid cannot bypass the magnetocaloric material due to the structure of the distribution chamber, resulting in the high heat exchange efficiency.
  • FIG. 1 is a schematic diagram a conventional active magnetic refrigerator.
  • FIG. 2 is a schematic diagram illustrating a configuration of a conventional active magnetic refrigerator.
  • FIG. 3 is a cross-sectional diagram illustrating an AMR bed of the conventional active magnetic refrigerator of Fig. 2.
  • FIG. 4 is a perspective view schematically illustrating a rotation type regenerator in accordance with a preferred embodiment of the present invention.
  • FIG. 5 is a perspective disassembled view illustrating a main portion of an AMR of
  • FIGs. 6 through 14 are diagrams illustrating a cycle of a magnetic refrigerator.
  • FIG. 4 is a perspective view schematically illustrating a rotation type regenerator in accordance with a preferred embodiment of the present invention
  • Fig. 5 is a perspective disassembled view illustrating a main portion of an AMR of Fig. 4
  • Figs. 6 through 14 are diagrams illustrating a cycle of a magnetic refrigerator.
  • a magnetic refrigerator in accordance with a preferred embodiment of the present invention comprises a regenerator 100, a cold- side heat exchanger 160 and a hot-side heat exchanger 170 thermally connected to the regenerator 100. While the cold-side heat exchanger 160 performs a cooling, the hot- side heat exchanger 170 performs a heat emission.
  • the regenerator 100 comprises an AMR 110, a magnet member 210 and a magnet rotating assembly for applying or erasing a magnetic field to the AMR 110.
  • the AMR 110 comprises a first AMR 11OA and a second AMR 11OB. As shown in
  • each of the AMR 110 comprises an AMR bed 111 including the magnetocaloric material for passing through a flow of the heat transfer fluid, a cold-side AMR nozzle connector 120L and a hot-side AMR nozzle connector 120L attached to both sides of the AMR bed the AMR bed 111.
  • a through-hole 114 to be filled up with the magnetocaloric material is formed in the
  • AMR bed 111 along a lengthwise direction thereof.
  • the cold-side AMR nozzle connector 120L and the hot-side AMR nozzle connector 120L are attached to the through-hole 114.
  • a cold-side inlet 121L and a cold-side distribution chamber 123L are disposed at each end of the cold-side AMR nozzle connector 120L, and a hot-side inlet 121H and a hot-side distribution chamber 123H are disposed at each end of the hot- side AMR nozzle connector 120H.
  • the distribution chambers 123L and 123H serve as a distribution chamber for uniform distribution through entire cross-section of a flow path of the through-hole 114.
  • a plurality of the first AMR 11OA are mounted at an opposing position, and a plurality of the second AMR 11OB are mounted between the first AMR 11OA, i.e. a cross structure.
  • the heat transfer fluid always passes through the magnetocaloric material, thereby improving the heat exchange efficiency.
  • the AMR beds 11 IA and 11 IB or the entire AMR bed 111 comprises a plastic.
  • the plastic has a large adiabatic effect and a wide temperature slope.
  • the through-hole 114 comprises an upper through-hole UP and a lower through-hole LP divided by a ribbed compartment R.
  • the ribbed compartment R serves a function of a rib such that the ribbed compartment R prevents a distortion of the AMR bed 111 due to a pressure.
  • a mesh M and plastic packing S are mounted at a mounting groove 115 of the through-hole 114 in order to prevent a leakage of the magnetocaloric material and the heat transfer fluid.
  • the cold-side heat exchanger 160 and the hot-side heat exchanger 170 are thermally coupled to the AMR 110 through heat exchange tubes 132, 133, 134, 135 and 136.
  • the flow of the heat transfer fluid is formed by a pump 140.
  • a change of a direction of the heat transfer fluid is carried out by solenoid valves SOLI through SOL4.
  • a bypass tube the bypass tube 137 is connected between an inlet and an outlet of the pump 140.
  • the magnet member 210 comprises the magnet 211 and a body 213 for supporting the magnet 211.
  • the magnet rotating assembly comprises a rotating plate 230 for supporting the magnet member 210 and a rotational power transfer member (not shown) for transferring a rotational power to the rotating plate 230.
  • the rotational power transfer member may be embodied various components such as a gear, a belt and a motor.
  • the AMR bed 111 is supported in a horizontal direction perpendicular to a vertical tower 150 such that the AMR bed 111 may move between the magnet 211.
  • the cold-side inlet 121L and the hot-side inlet 121H of the cold- side AMR nozzle connector 120L and the hot-side AMR nozzle connector 120L are right-angled toward a vertical tower 150 such that the cold-side inlet 121L and the hot- side inlet 12 IH lie on a same plane as the AMR bed 111. This is to prevent an interference of a rotation of the magnet member occurring due to a size of a nipple for flowing the heat transfer fluid into the magnetocaloric material which is larger than a distance between the magnets.
  • the magnet member 210 may be used in a small space when a radius of a rotation is minimized.
  • Fig. 6 illustrates a state wherein the two magnet members 210 are accurately positioned at the space between the first AMR 11OA and the second AMR 11OB. It is preferable that the magnet members 210 have an angle of 180 therebetween. Since the heat transfer fluid should not flow in the first AMR HOA and the second AMR HOB in Fig. 1, the solenoid valves SOLI through SOL4 are OFF, and the heat transfer fluid is bypassed through the solenoid valve SOL3 and the solenoid valve SOL4 coupled to the bypass tube 137.
  • the heat transfer fluid having the atmospheric temperature that has passed through the hot-side heat exchanger 170 is cooled by passing through the second AMR HOB via the heat exchange tube 132, and the heat transfer fluid is cooled additionally by passing through the opposing second AMR HOB, thereby providing a dual-cooling effect.
  • the temperature of the dual-cooled heat transfer fluid returns to the atmospheric temperature (actually, to a temperature a little lower than the atmospheric temperature) by passing through the cold-side heat exchanger 160 to be subjected to a first heating by passing through the first AMR 11OA and to a second heating by passing through the opposing first AMR 11OA.
  • the heat transfer fluid that has passed through the opposing first AMR 11OA is subjected to the dual-cooling and flows to the pump 140 through the heat exchange tube 134 and the heat exchange tube 135.
  • the heat transfer fluid passes through the pump 140 and the hot-side heat exchanger 170 to return to the atmospheric temperature (actually, to a temperature a little higher than the atmospheric temperature).
  • the heat transfer fluid is then enters the AMR HOB.
  • Fig. 8 illustrates a state after the plurality of the AMRs 11OA is in the magnet 211 completely and before the plurality of the AMRs 11OA move out of the magnet 211 while the heat transfer fluid flows in a direction described above.
  • the solenoid valve SOL2 is OFF and the solenoid valves SOLI, SOL3 and SOL4 are ON, wherein a cold-side inlet 121AL and a hot-side inlet 121AH of the AMR 11OA serve as a cold-side inlet and a hot-side outlet, a hot-side inlet 121BH and a cold-side inlet 121BL of the AMR 11OB serve as the hot-side outlet and the cold-side inlet.
  • the heat transfer fluid does not flow to the AMR 110 from a moment when the plurality of the AMR 11OA starts to move in order to move out of the magnet 211 but bypassed.
  • the heat transfer fluid pass through the pump 140 and the hot-side heat exchanger 170 to return to the atmospheric temperature (actually, to a temperature a little higher than the atmospheric temperature) to enter the plurality of the AMR 11OA via the heat exchange tube 134.
  • the above-described process forms a single cycle.
  • the solenoid valve SOLI is OFF and the solenoid valves SOL2, SOL3 and SOL4 are ON, wherein the cold-side inlet 121AL and the hot-side inlet 121AH of the AMR 11OA serve as a cold-side outlet and a hot-side inlet, a hot-side inlet 121BH and a cold-side inlet 121BL of the AMR HOB serve as the hot-side inlet and the cold-side outlet.
  • the heat transfer fluid does not flow to the AMR 110 from a moment when the plurality of the AMR HOB starts to move in order to move out of the magnet 211 but bypassed.
  • FIG. 6 through 14 illustrates a half cycle of a total rotational cycle, and the half cycle shown in Figs. 6 through 14 is repeated until the magnet member 210 returns to an initial position to complete the total rotational cycle.
  • An advantage of the cycle of the magnetic refrigerator in accordance with the preferred embodiment of the present invention lies in that the heat exchange efficiency is improved by employing a structure wherein the heat transfer fluid directly passes through the magnetocaloric material, and the four AMRs 110 are connected for more magnetocaloric material, resulting in double cooling effects.
  • the AMR includes the ribbed compartment which prevents the distortion of a shape of the AMR due to the pressure of the heat transfer fluid. Even when the distortion occurs, the heat transfer fluid cannot bypass the magnetocaloric material due to the structure of the distribution chamber, resulting in a high heat exchange efficiency.
  • the AMR 110 having a shape of a simple plate, the AMR 110 provides the high efficiency and is formed in plastic for an easy molding.
  • the magnetic refrigerator in accordance with the preferred embodiment of the present invention employs a rotational AMR cycle operation, the high cooling effect is provided due to a temperature slope of a low temperature and a high temperature.
  • the heat transfer fluid is dual-cooled by passing two AMRs, and dual-heated by passing two AMRs to provide twice the cooling efficiency.
  • the heat transfer fluid flows from the cold-side to the hot-side when AMR enters into the magnet, and the heat transfer fluid does not flow in the AMR when the AMR moves out of the magnet.
  • the heat transfer fluid flows from the hot- side to the cold- side when the AMR moves out of the magnet to be cooled.
  • the hot-side heat exchanger since the hot-side heat exchanger is disposed at the outlet of the pump, the hot-side heat exchanger cools the heat transfer fluid heated by the pump to the atmospheric temperature prior to entering the AMR.
  • the magnetocaloric material has a characteristic wherein the temperature thereof is changed when the magnetic field is applied.
  • the magnetocaloric material 112 comprises a gadolinium (Gd) of a fine powder type.
  • the gadolinium has pores having a high osmosis to the flow of the heat transfer fluid, and a superior absorption and emission of a heat.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un régénérateur employant un élément magnétique de type rotatif et un régénérateur magnétique actif. L'invention concerne également un réfrigérateur magnétique employant le régénérateur.
EP06812562.4A 2006-07-10 2006-11-13 Régénérateur de type rotatif et réfrigérateur magnétique employant le régénérateur Withdrawn EP2038590A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020060064344A KR100737781B1 (ko) 2006-07-10 2006-07-10 회전식 재생기 및 이를 이용한 자기냉동기
PCT/KR2006/004729 WO2008007833A1 (fr) 2006-07-10 2006-11-13 Régénérateur de type rotatif et réfrigérateur magnétique employant le régénérateur

Publications (2)

Publication Number Publication Date
EP2038590A1 true EP2038590A1 (fr) 2009-03-25
EP2038590A4 EP2038590A4 (fr) 2013-05-01

Family

ID=38503874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06812562.4A Withdrawn EP2038590A4 (fr) 2006-07-10 2006-11-13 Régénérateur de type rotatif et réfrigérateur magnétique employant le régénérateur

Country Status (6)

Country Link
US (1) US20090266083A1 (fr)
EP (1) EP2038590A4 (fr)
JP (1) JP2009543021A (fr)
KR (1) KR100737781B1 (fr)
CN (1) CN101523132A (fr)
WO (1) WO2008007833A1 (fr)

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JP2009543021A (ja) 2009-12-03
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EP2038590A4 (fr) 2013-05-01
CN101523132A (zh) 2009-09-02
KR100737781B1 (ko) 2007-07-10

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