US20130199754A1 - Thermo-magnetic exchanging device - Google Patents
Thermo-magnetic exchanging device Download PDFInfo
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- US20130199754A1 US20130199754A1 US13/367,906 US201213367906A US2013199754A1 US 20130199754 A1 US20130199754 A1 US 20130199754A1 US 201213367906 A US201213367906 A US 201213367906A US 2013199754 A1 US2013199754 A1 US 2013199754A1
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- alloy
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- heat exchanging
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- heat
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- 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
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- 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
- F25B2321/0023—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with modulation, influencing or enhancing an existing magnetic field
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- 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
- thermo-magnetic exchanging device and in particular, to a thermo-magnetic exchanging device including a heat exchanging element and a magnet unit generating a magnetic field to the heat exchanging element.
- Magnetic refrigeration is considered a highly efficient and environmentally friendly cooling technology. Magnetic refrigeration technologies adapt a magnetocaloric effect of magnetocaloric materials (MCM) to realize or utilize refrigeration cycles.
- MCM magnetocaloric materials
- a conventional thermo-magnetic exchanging device 1 includes a heat exchanging element 10 and a magnet unit 20 .
- the heat exchanging element 10 includes a channel 11 and a plurality of channels 12 , wherein the channel 11 is located between the channels 12 .
- a heat-carrying fluid flows through the channels 11 and 12 , wherein the cross-section areas of the channels 11 and 12 are the same, and the distance between the two adjacent channels 11 and 12 are the same.
- the magnet unit 20 can generate a magnetic field to the heat exchanging element 10 .
- the magnetic field in the channel 11 may exceed that in the channel 12 , and the heat exchange efficiency between the heat exchanging element 10 and the heat-carrying fluid in the channel 11 is greater than that between the heat exchanging element 10 and the heat-carrying fluid in the channel 12 .
- the efficiency of the thermo-magnetic exchanging device 1 is decreased.
- the object of the invention is to provide a thermo-magnetic exchanging device including a heat exchanging element and a magnet unit.
- the heat exchanging element has at least one channel.
- the magnet unit generates a magnetic field to the heat exchanging element. Temperature gradients at different points of the heat exchanging element are substantially the same when a heat-carrying fluid flows through the channel.
- a thereto-magnetic exchanging device includes a heat exchanging element and a magnet unit.
- the heat exchanging element has at least one channel to convey a heat-carrying fluid and has two ends.
- the magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element.
- the magnitude of the magnetic field is non-uniform.
- the cross-sectional area of the channel corresponds to the magnetic field so that temperature gradients at different points of each end of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel
- thermo-magnetic exchanging device includes a heat exchanging element and a magnet unit.
- the heat exchanging element has a first channel and a second channel to convey a heat-carrying fluid.
- the first channel has a first cross-sectional area and the second channel has a second cross-sectional area, and the first cross-sectional area is greater than the second cross-sectional area.
- the magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element.
- the magnitude of the magnetic field applied to the first channel is greater than the magnitude of the magnetic field applied to the second channel.
- a thereto-magnetic exchanging device includes a heat exchanging element and a magnet unit.
- the heat exchanging element has a plurality of first channels and at least one second channel to convey a heat-carrying fluid.
- the distance between the two adjacent first channels is greater than the distance between the two adjacent first channel and second channel.
- the magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element.
- the magnitude of the magnetic field applied to each of the first channels is greater than the magnitude of the magnetic field applied to the second channel.
- thermo-magnetic exchanging device the temperature gradients at different points of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel, and the exchange efficiency of the thermo-magnetic exchanging device is increased.
- FIG. 1 is a schematic view of a conventional thermo-magnetic exchanging device
- FIG. 2 is a schematic view of a thermo-magnetic exchanging device of a first embodiment of the invention
- FIG. 3 is a perspective view of a heat exchanging element of the first embodiment of the invention.
- FIG. 4 is a cross-sectional view along the line A-A′ of FIG. 3 ;
- FIG. 5 is a schematic view of a thermo-magnetic exchanging device of a second embodiment of the invention.
- FIG. 6 is an exploded schematic view of a thermo-magnetic exchanging device of a third embodiment of the invention.
- FIG. 2 is a schematic view of a thermo-magnetic exchanging device 2 according to a first embodiment of the invention.
- FIG. 3 is a perspective view of a heat exchanging element 30 according to the first embodiment of the invention.
- FIG. 4 is a cross-sectional view along the line A-A′ of FIG. 3 .
- the thermo-magnetic exchanging device 2 includes a heat exchanging element 30 and two magnet units 40 .
- the heat exchanging element 30 has a tube structure.
- the heat exchanging element 30 is made of a material selected from a group consisting of at least one magnetocaloric material.
- the magnetocaloric material may be Mn—Fe—P—As alloy, Mn—Fe—P—Si alloy, Mn—Fe—P—Ge alloy, Mn—As—Sb alloy, Me—Fe—Co—Ge alloy, Mn—Ge—Sb alloy, Mn—Ge—Si alloy, La—Fe—Co—Si alloy, La—Fe—Si—H alloy, La—Na—Mn—O alloy, La—K—Mn—O alloy, La—Ca—Sr—Mn—O alloy, La—Ca—Pb—Mn—O alloy, La—Ca—Ba—Mn—O alloy, Gd alloy, Gd—Si—Ge, Gd—Yb alloy, Gd—Si—Sb alloy, Gd—Dy—Al—Co alloy, or Ni—
- the heat exchanging element 30 includes a channel 31 and two channels 32 .
- the number Of the channel 31 or the channels 32 is not to be limited.
- the channel 31 is located between the channels 32 .
- the channel 31 and the channels 32 are arranged along a first extension direction D 1 .
- the first extension direction D 1 is parallel to a cross-section S 1 of the heat exchanging element 30 .
- the heat exchanging element 30 , the channel 31 , and the channels 32 are extended along a longitudinal direction D 3 .
- the channel 31 and the channels 32 are provided to convey a heat-carrying fluid.
- the magnet unit 40 may be a permanent magnet, a superconducting magnet, or a solenoid. Two magnet units 40 are disposed around the heat exchanging element 30 . In the embodiment, the heat exchanging element 30 is located between the magnet units 40 . The magnet units 40 and the heat exchanging element 30 are arranged along a second extension direction D 2 , wherein the first extension direction D 1 , the second extension direction D 2 , and the longitudinal direction D 3 are perpendicular to each other. Each of the magnet units 40 can provide a magnetic field to the heat exchanging element 30 , and the magnitude of the magnetic field may be time-varying and non-uniform. Thus, when the magnetic field is applied to the heat exchanging element 30 , the heat exchange ability of the heat exchanging element 30 can be changed.
- the cross-section S 1 of the heat exchanging element 30 has a first cross-section zone Z 1 and two second cross-section zones Z 2 .
- the channel 31 is located in the first cross-section zone Z 1
- the channels 32 are located in the second cross-section zone Z 2 , respectively.
- the areas of the first cross-section zone Z 1 and the second cross-section zones Z 2 are the same, wherein the first cross-section zone Z 1 is located between the second cross-section zones Z 2 .
- the first cross-section zone Z 1 and the second cross-section zones Z 2 are arranged along the first extension direction D 1 .
- the arrangement of the first cross-section zone Z 1 and the second cross-section zones Z 2 are substantially parallel to the magnet unit 40 .
- the first cross-section zone Z 1 is close to the center area of the magnet unit 40 .
- the second cross-section zones Z 2 are close to two opposite ends of the magnet unit 40 .
- the magnetic field in the first cross-section zone Z 1 exceeds that in each of the second cross-section zones Z 2 . Namely, the magnitude of the magnetic field applied to the first channel 31 is greater than the magnitude of the magnetic field applied to each of the second channels 32 .
- a stronger magnetic field can facilitate higher heat exchange ability of the heat exchanging element 30 .
- the cross-sectional area of the channels 31 and 32 are designed to correspond to the magnetic field distribution within the heat exchanging element 30 , temperature gradients at different points of the cross-section S 1 of the heat exchanging element 30 are substantially the same when the heat-carrying fluid flows through the channels 31 and 32 .
- the cross-section area of the channel 31 is greater than the cross-section area of the channel 32 , and the area of the first cross-section zone Z 1 and the second cross-section zone Z 2 are the same. Since the first cross-section zone Z 1 of the heat exchanging element 30 has stronger magnetic field, the cross-section area of the channel 31 is designed to exceed that of the channel 32 .
- the flowing velocity of the heat-carrying fluid in the channel 31 is higher than that in the channel 32 . Since the magnetic field of the second cross-section zones Z 2 are lower than that of the first cross-section zone Z 1 , heat exchange ability of the heat exchanging element 30 in the second cross-section zones Z 2 are relatively weak. However, by the slower flowing velocity of the heat-carrying fluid in the channels 32 , the heat exchange between the exchanging element 30 in the second cross-section zone Z 2 and the heat-carrying fluid in the channels 32 is sufficient. Thus, the temperature gradients in the second cross-section zone Z 1 and the second cross-section zone Z 2 are substantially the same.
- FIG. 5 is a schematic view of a thermo-magnetic exchanging device 2 a of a second embodiment of the invention.
- the heat exchanging element 30 a includes a plurality of channels 31 a .
- the cross-section areas of each of the channels 31 a and the channels 32 a are the same.
- the number of the channel 31 a in the first cross-section zone Z 1 exceeds that of the channel 32 a in the second cross-section zone Z 2 .
- the total cross-section area of the channels 31 a in the first cross-section zone Z 1 exceeds that of the channel 32 a in the second cross-section zone Z 2 .
- FIG. 5 is a schematic view of a thermo-magnetic exchanging device 2 a of a second embodiment of the invention.
- the heat exchanging element 30 a includes a plurality of channels 31 a .
- the cross-section areas of each of the channels 31 a and the channels 32 a are the same.
- the distance between the two adjacent channels 31 a exceeds that between the two adjacent channel 31 a and channel 32 a .
- the total cross-section area of the channels 31 a in the first cross-section zone Z 1 and the total cross-section area of the channel 32 a in the second cross-section zone Z 2 can be appropriately designed corresponding to the magnitude of the magnetic field.
- FIG. 6 is an exploded schematic view of a thermo-magnetic exchanging device 2 b of a third embodiment of the invention.
- the heat exchanging element 30 b includes a heat exchanging portion 33 and a heat exchanging portion 34 , and the heat exchanging portion 33 is coupled with the heat exchanging portion 34 .
- Each of the magnet units 40 b includes a magnet portion 41 and a magnet portion 42 , and the magnet portion 41 is coupled with the magnet portion 42 .
- the channel 31 includes a channel portion 311 and a channel portion 312 .
- Each of the channels 32 includes a channel portion 321 and a channel portion 322 .
- the channel portion 311 is communicated with the channel portion 312
- the channel portion 321 is communicated with the channel portion 322 .
- the magnetic field generated by the magnet portion 41 is greater than the magnetic field generated by the magnet portion 42 .
- the cross-section area of the channel portion 311 exceeds that of the channel portion 312
- the cross-section area of the channel portion 321 exceeds that of the channel portion 322 .
- the total cross-section area of the channels 31 and 32 of the heat exchanging portion 33 exceeds that of the channels 31 and 32 of the heat exchanging portion 34 .
- the cross-sectional areas of the channels 31 and 32 can be appropriately designed corresponding to the magnitude of the magnetic field.
- thermo-magnetic exchanging device the temperature gradients at different points of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel, and the exchange efficiency of the thermo-magnetic exchanging device is increased.
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Abstract
A thermo-magnetic exchanging device includes a heat exchanging element and a magnet unit. The heat exchanging element has at least one channel to convey a heat-carrying fluid. The magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element. The magnitude of the magnetic field is non-uniform. The cross-sectional area of the channel corresponds to the magnetic field so that temperature gradients at different points of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel.
Description
- 1. Field of the Invention
- The inventions relates to a thermo-magnetic exchanging device, and in particular, to a thermo-magnetic exchanging device including a heat exchanging element and a magnet unit generating a magnetic field to the heat exchanging element.
- 2. Description of the Related Art
- Magnetic refrigeration is considered a highly efficient and environmentally friendly cooling technology. Magnetic refrigeration technologies adapt a magnetocaloric effect of magnetocaloric materials (MCM) to realize or utilize refrigeration cycles.
- Please refer to
FIG. 1 , a conventional thermo-magnetic exchanging device 1 includes aheat exchanging element 10 and amagnet unit 20. Theheat exchanging element 10 includes a channel 11 and a plurality ofchannels 12, wherein the channel 11 is located between thechannels 12. In this embodiment, a heat-carrying fluid flows through thechannels 11 and 12, wherein the cross-section areas of thechannels 11 and 12 are the same, and the distance between the twoadjacent channels 11 and 12 are the same. Themagnet unit 20 can generate a magnetic field to theheat exchanging element 10. Since the magnetic field is non-uniform, the magnetic field in the channel 11 may exceed that in thechannel 12, and the heat exchange efficiency between theheat exchanging element 10 and the heat-carrying fluid in the channel 11 is greater than that between theheat exchanging element 10 and the heat-carrying fluid in thechannel 12. Thus, the efficiency of the thermo-magnetic exchanging device 1 is decreased. - To solve the problems of the prior art, the object of the invention is to provide a thermo-magnetic exchanging device including a heat exchanging element and a magnet unit. The heat exchanging element has at least one channel. The magnet unit generates a magnetic field to the heat exchanging element. Temperature gradients at different points of the heat exchanging element are substantially the same when a heat-carrying fluid flows through the channel.
- For the above object, a thereto-magnetic exchanging device includes a heat exchanging element and a magnet unit. The heat exchanging element has at least one channel to convey a heat-carrying fluid and has two ends. The magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element. The magnitude of the magnetic field is non-uniform. The cross-sectional area of the channel corresponds to the magnetic field so that temperature gradients at different points of each end of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel
- For the above object, a thermo-magnetic exchanging device includes a heat exchanging element and a magnet unit. The heat exchanging element has a first channel and a second channel to convey a heat-carrying fluid. The first channel has a first cross-sectional area and the second channel has a second cross-sectional area, and the first cross-sectional area is greater than the second cross-sectional area. The magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element. The magnitude of the magnetic field applied to the first channel is greater than the magnitude of the magnetic field applied to the second channel.
- For the above object, a thereto-magnetic exchanging device includes a heat exchanging element and a magnet unit. The heat exchanging element has a plurality of first channels and at least one second channel to convey a heat-carrying fluid. The distance between the two adjacent first channels is greater than the distance between the two adjacent first channel and second channel. The magnet unit is disposed around the heat exchanging element and provides a magnetic field to the heat exchanging element. The magnitude of the magnetic field applied to each of the first channels is greater than the magnitude of the magnetic field applied to the second channel.
- In conclusion, the temperature gradients at different points of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel, and the exchange efficiency of the thermo-magnetic exchanging device is increased.
- The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
-
FIG. 1 is a schematic view of a conventional thermo-magnetic exchanging device; -
FIG. 2 is a schematic view of a thermo-magnetic exchanging device of a first embodiment of the invention; -
FIG. 3 is a perspective view of a heat exchanging element of the first embodiment of the invention; -
FIG. 4 is a cross-sectional view along the line A-A′ ofFIG. 3 ; -
FIG. 5 is a schematic view of a thermo-magnetic exchanging device of a second embodiment of the invention; and -
FIG. 6 is an exploded schematic view of a thermo-magnetic exchanging device of a third embodiment of the invention. - Please refer to
FIGS. 2 to 4 .FIG. 2 is a schematic view of a thermo-magnetic exchanging device 2 according to a first embodiment of the invention.FIG. 3 is a perspective view of aheat exchanging element 30 according to the first embodiment of the invention.FIG. 4 is a cross-sectional view along the line A-A′ ofFIG. 3 . The thermo-magnetic exchanging device 2 includes aheat exchanging element 30 and twomagnet units 40. Theheat exchanging element 30 has a tube structure. - The
heat exchanging element 30 is made of a material selected from a group consisting of at least one magnetocaloric material. The magnetocaloric material, for example, and not limited to, may be Mn—Fe—P—As alloy, Mn—Fe—P—Si alloy, Mn—Fe—P—Ge alloy, Mn—As—Sb alloy, Me—Fe—Co—Ge alloy, Mn—Ge—Sb alloy, Mn—Ge—Si alloy, La—Fe—Co—Si alloy, La—Fe—Si—H alloy, La—Na—Mn—O alloy, La—K—Mn—O alloy, La—Ca—Sr—Mn—O alloy, La—Ca—Pb—Mn—O alloy, La—Ca—Ba—Mn—O alloy, Gd alloy, Gd—Si—Ge, Gd—Yb alloy, Gd—Si—Sb alloy, Gd—Dy—Al—Co alloy, or Ni—Mn—Ga alloy. - The
heat exchanging element 30 includes achannel 31 and twochannels 32. The number Of thechannel 31 or thechannels 32 is not to be limited. In the embodiment, thechannel 31 is located between thechannels 32. Thechannel 31 and thechannels 32 are arranged along a first extension direction D1. The first extension direction D1 is parallel to a cross-section S1 of theheat exchanging element 30. Theheat exchanging element 30, thechannel 31, and thechannels 32 are extended along a longitudinal direction D3. Thechannel 31 and thechannels 32 are provided to convey a heat-carrying fluid. - The
magnet unit 40 may be a permanent magnet, a superconducting magnet, or a solenoid. Twomagnet units 40 are disposed around theheat exchanging element 30. In the embodiment, theheat exchanging element 30 is located between themagnet units 40. Themagnet units 40 and theheat exchanging element 30 are arranged along a second extension direction D2, wherein the first extension direction D1, the second extension direction D2, and the longitudinal direction D3 are perpendicular to each other. Each of themagnet units 40 can provide a magnetic field to theheat exchanging element 30, and the magnitude of the magnetic field may be time-varying and non-uniform. Thus, when the magnetic field is applied to theheat exchanging element 30, the heat exchange ability of theheat exchanging element 30 can be changed. - Please refer to
FIG. 2 , the cross-section S1 of theheat exchanging element 30 has a first cross-section zone Z1 and two second cross-section zones Z2. Thechannel 31 is located in the first cross-section zone Z1, and thechannels 32 are located in the second cross-section zone Z2, respectively. The areas of the first cross-section zone Z1 and the second cross-section zones Z2 are the same, wherein the first cross-section zone Z1 is located between the second cross-section zones Z2. In the embodiment, the first cross-section zone Z1 and the second cross-section zones Z2 are arranged along the first extension direction D1. - The arrangement of the first cross-section zone Z1 and the second cross-section zones Z2 are substantially parallel to the
magnet unit 40. The first cross-section zone Z1 is close to the center area of themagnet unit 40. The second cross-section zones Z2 are close to two opposite ends of themagnet unit 40. The magnetic field in the first cross-section zone Z1 exceeds that in each of the second cross-section zones Z2. Namely, the magnitude of the magnetic field applied to thefirst channel 31 is greater than the magnitude of the magnetic field applied to each of thesecond channels 32. - In general, a stronger magnetic field can facilitate higher heat exchange ability of the
heat exchanging element 30. Since the cross-sectional area of thechannels heat exchanging element 30, temperature gradients at different points of the cross-section S1 of theheat exchanging element 30 are substantially the same when the heat-carrying fluid flows through thechannels - In the embodiment, the cross-section area of the
channel 31 is greater than the cross-section area of thechannel 32, and the area of the first cross-section zone Z1 and the second cross-section zone Z2 are the same. Since the first cross-section zone Z1 of theheat exchanging element 30 has stronger magnetic field, the cross-section area of thechannel 31 is designed to exceed that of thechannel 32. - When the heat-carrying fluid flows through the
channel 31 and thechannels 32, the flowing velocity of the heat-carrying fluid in thechannel 31 is higher than that in thechannel 32. Since the magnetic field of the second cross-section zones Z2 are lower than that of the first cross-section zone Z1, heat exchange ability of theheat exchanging element 30 in the second cross-section zones Z2 are relatively weak. However, by the slower flowing velocity of the heat-carrying fluid in thechannels 32, the heat exchange between the exchangingelement 30 in the second cross-section zone Z2 and the heat-carrying fluid in thechannels 32 is sufficient. Thus, the temperature gradients in the second cross-section zone Z1 and the second cross-section zone Z2 are substantially the same. - Please refer to
FIG. 5 , which is a schematic view of a thermo-magnetic exchanging device 2 a of a second embodiment of the invention. In the embodiment, theheat exchanging element 30 a includes a plurality ofchannels 31 a. The cross-section areas of each of thechannels 31 a and thechannels 32 a are the same. However, the number of thechannel 31 a in the first cross-section zone Z1 exceeds that of thechannel 32 a in the second cross-section zone Z2. Namely, the total cross-section area of thechannels 31 a in the first cross-section zone Z1 exceeds that of thechannel 32 a in the second cross-section zone Z2. Moreover, as shown inFIG. 5 , the distance between the twoadjacent channels 31 a exceeds that between the twoadjacent channel 31 a andchannel 32 a. Thus, the total cross-section area of thechannels 31 a in the first cross-section zone Z1 and the total cross-section area of thechannel 32 a in the second cross-section zone Z2 can be appropriately designed corresponding to the magnitude of the magnetic field. - Please refer to
FIG. 6 , which is an exploded schematic view of a thermo-magnetic exchangingdevice 2 b of a third embodiment of the invention. Theheat exchanging element 30 b includes aheat exchanging portion 33 and aheat exchanging portion 34, and theheat exchanging portion 33 is coupled with theheat exchanging portion 34. Each of themagnet units 40 b includes amagnet portion 41 and amagnet portion 42, and themagnet portion 41 is coupled with themagnet portion 42. Thechannel 31 includes achannel portion 311 and achannel portion 312. Each of thechannels 32 includes achannel portion 321 and achannel portion 322. Thechannel portion 311 is communicated with thechannel portion 312, and thechannel portion 321 is communicated with thechannel portion 322. - In the embodiment, the magnetic field generated by the
magnet portion 41 is greater than the magnetic field generated by themagnet portion 42. The cross-section area of thechannel portion 311 exceeds that of thechannel portion 312, and the cross-section area of thechannel portion 321 exceeds that of thechannel portion 322. Thus, the total cross-section area of thechannels heat exchanging portion 33 exceeds that of thechannels heat exchanging portion 34. Namely, the cross-sectional areas of thechannels channels heat exchanging element 30 b are substantially the same. - In conclusion, the temperature gradients at different points of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel, and the exchange efficiency of the thermo-magnetic exchanging device is increased.
- While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims (12)
1. A thermo-magnetic exchanging device, comprising:
a heat exchanging element, having at least one channel to convey a heat-carrying fluid and having two ends; and
a magnet unit, disposed around the heat exchanging element and providing a magnetic field to the heat exchanging element, wherein the magnitude of the magnetic field is non-uniform,
wherein the cross-sectional area of the channel corresponds to the magnetic field so that temperature gradients at different points of each end of the heat exchanging element are substantially the same when the heat-carrying fluid flows through the channel.
2. The thermo-magnetic exchanging device as claimed in claim 1 , wherein the heat exchanging element is made of a material selected from a group consisting of at least one magnetocaloric material.
3. The thermo-magnetic exchanging device as claimed in claim 2 , wherein the magnetocaloric material is Me—Fe—P—As alloy, Me—Fe—P—Si alloy, Me—Fe—P—Ge alloy, Mn—As—Sb alloy, Me—Fe—Co—Ge alloy, Mn—Ge—Sb alloy, Mn—Ge—Si alloy, La—Fe—Co—Si alloy, La—Fe—Si—H alloy, La—Na—Mn—O alloy, La—K—Mn—O alloy, La—Ca—Sr—Mn—O alloy, La—Ca—Pb—Mn—O alloy, La—Ca—Ba—Mn—O alloy, Gd alloy, Gd—Si—Ge, Gd—Yb alloy, Gd—Si—Sb alloy, Gd—Dy—Al—Co alloy, or Ni—Mn—Ga alloy.
4. The thermo-magnetic exchanging device as claimed in claim 1 , wherein the magnet unit is a permanent magnet, a superconducting magnet, or a solenoid.
5. A thereto-magnetic exchanging device, comprising:
a heat exchanging element having a first channel and a second channel to convey a heat-carrying fluid, wherein the first channel has a first cross-sectional area and the second channel has a second cross-sectional area, and the first cross-sectional area is greater than the second cross-sectional area; and
a magnet unit, disposed around the heat exchanging element, providing a magnetic field to the heat exchanging element,
wherein the magnitude of the magnetic field applied to the first channel is greater than the magnitude of the magnetic field applied to the second channel.
6. The thermo-magnetic exchanging device as claimed in claim 5 , wherein the heat exchanging element is made of a material selected from a group consisting of at least one magnetocaloric material.
7. The thermo-magnetic exchanging device as claimed in claim 6 , wherein the magnetocaloric material is Me—Fe—P—As alloy, Me—Fe—P—Si alloy, Me—Fe—P—Ge alloy, Mn—As—Sb alloy, Me—Fe—Co—Ge alloy, Mn—Ge—Sb alloy, Mn—Ge—Si alloy, La—Fe—Co—Si alloy, La—Fe—Si—H alloy, La—Na—Mn—O alloy, La—K—Mn—O alloy, La—Ca—Sr—Mn—O alloy, La—Ca—Pb—Mn—O alloy, La—Ca—Ba—Mn—O alloy, Gd alloy, Gd—Si—Ge, Gd—Yb alloy, Gd—Si—Sb alloy, Gd—Dy—Al—Co alloy, or Ni—Mn—Ga alloy.
8. The thermo-magnetic exchanging device as claimed in claim 5 , wherein the magnet unit is a permanent magnet, a superconducting magnet, or a solenoid.
9. A thermo-magnetic exchanging device, comprising:
a heat exchanging element having a plurality of first channels and at least one second channel to convey a heat-carrying fluid, wherein the distance between the two adjacent first channels is greater than the distance between the two adjacent first channel and second channel; and
a magnet unit, disposed around the heat exchanging element, providing a magnetic field applied to the heat exchanging element,
wherein the magnitude of the magnetic field applied to each of the first channels is greater than the magnitude of the magnetic field applied to the second channel.
10. The thermo-magnetic exchanging device as claimed in claim 9 , wherein the heat exchanging element is made of a material selected from a group consisting of at least one magnetocaloric material.
11. The thermo-magnetic exchanging device as claimed in claim 10 , wherein the magnetocaloric material is Me—Fe—P—As alloy, Me—Fe—P—Si alloy, Me—Fe—P—Ge alloy, Mn—As—Sb alloy, Me—Fe—Co—Ge alloy, Mn—Ge—Sb alloy, Mn—Ge—Si alloy, La—Fe—Co—Si alloy, La—Fe—Si—H alloy, La—Na—Mn—O alloy, La—K—Mn—O alloy, La—Ca—Sr—Mn—O alloy, La—Ca—Pb—Mn—O alloy, La—Ca—Ba—Mn—O alloy, Gd alloy, Gd—Si—Ge, Gd—Yb alloy, Gd—Si—Sb alloy, Gd—Dy—Al—Co alloy, or Ni—Mn—Ga alloy.
12. The thermo-magnetic exchanging device as claimed in claim 9 , wherein the magnet unit is a permanent magnet, a superconducting magnet, or a solenoid.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US13/367,906 US20130199754A1 (en) | 2012-02-07 | 2012-02-07 | Thermo-magnetic exchanging device |
CN201210389653.4A CN103245124B (en) | 2012-02-07 | 2012-10-15 | Thermo-magnetic exchanging device |
DE102012110465A DE102012110465A1 (en) | 2012-02-07 | 2012-10-31 | THERMOMAGNETIC EXCHANGE DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/367,906 US20130199754A1 (en) | 2012-02-07 | 2012-02-07 | Thermo-magnetic exchanging device |
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US20130199754A1 true US20130199754A1 (en) | 2013-08-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/367,906 Abandoned US20130199754A1 (en) | 2012-02-07 | 2012-02-07 | Thermo-magnetic exchanging device |
Country Status (3)
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US (1) | US20130199754A1 (en) |
CN (1) | CN103245124B (en) |
DE (1) | DE102012110465A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130017386A1 (en) * | 2011-07-12 | 2013-01-17 | Delta Electronics, Inc. | Magnetocaloric material structure |
US20150184901A1 (en) * | 2012-08-01 | 2015-07-02 | Cooltech Applications | One-piece part including a magnetocaloric material including an alloy including iron and silicon and at least one lanthanide, and method for manufacturing said one-piece part |
US20150184900A1 (en) * | 2012-08-01 | 2015-07-02 | Cooltech Applications | One-piece part including a magnetocaloric material not including an alloy including iron and silicon and a lanthanide, and heat generator including said part |
US20160356529A1 (en) * | 2015-06-08 | 2016-12-08 | Eberspächer Climate Control Systems GmbH & Co. KG | Temperature control unit, especially vehicle temperature control unit |
WO2018083841A1 (en) * | 2016-11-02 | 2018-05-11 | 日本碍子株式会社 | Magnetic member for magnetic refrigeration machine |
CN115989391A (en) * | 2020-07-17 | 2023-04-18 | 三菱电机株式会社 | Magnetic refrigerating device |
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US20040182086A1 (en) * | 2003-03-20 | 2004-09-23 | Hsu-Cheng Chiang | Magnetocaloric refrigeration device |
US7076959B2 (en) * | 2003-06-30 | 2006-07-18 | Brookhaven Science Associates, Llc | Enhanced magnetocaloric effect material |
US20070125095A1 (en) * | 2005-12-06 | 2007-06-07 | Hideo Iwasaki | Heat transporting apparatus |
US20070240428A1 (en) * | 2006-03-30 | 2007-10-18 | Akihiro Koga | Hybrid magnetic refrigerator |
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DE19955277A1 (en) * | 1999-11-17 | 2001-05-23 | Suthoff Erika | Method to influence thermal economy of body, e.g. electronic equipment |
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CN2433561Y (en) * | 2000-07-07 | 2001-06-06 | 顾仲夫 | Semiconductor air conditioner |
US20110139404A1 (en) * | 2009-12-16 | 2011-06-16 | General Electric Company | Heat exchanger and method for making the same |
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- 2012-02-07 US US13/367,906 patent/US20130199754A1/en not_active Abandoned
- 2012-10-15 CN CN201210389653.4A patent/CN103245124B/en not_active Expired - Fee Related
- 2012-10-31 DE DE102012110465A patent/DE102012110465A1/en not_active Withdrawn
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US4441325A (en) * | 1981-11-27 | 1984-04-10 | Commissariat A L'energie Atomique | Refrigerating or heat pumping process and apparatus |
US20040182086A1 (en) * | 2003-03-20 | 2004-09-23 | Hsu-Cheng Chiang | Magnetocaloric refrigeration device |
US7076959B2 (en) * | 2003-06-30 | 2006-07-18 | Brookhaven Science Associates, Llc | Enhanced magnetocaloric effect material |
US20070125095A1 (en) * | 2005-12-06 | 2007-06-07 | Hideo Iwasaki | Heat transporting apparatus |
US20070240428A1 (en) * | 2006-03-30 | 2007-10-18 | Akihiro Koga | Hybrid magnetic refrigerator |
US20100058775A1 (en) * | 2008-09-04 | 2010-03-11 | Kabushiki Kaisha Toshiba | Magnetically refrigerating magnetic material, magnetic refrigeration apparatus, and magnetic refrigeration system |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130017386A1 (en) * | 2011-07-12 | 2013-01-17 | Delta Electronics, Inc. | Magnetocaloric material structure |
US20150184901A1 (en) * | 2012-08-01 | 2015-07-02 | Cooltech Applications | One-piece part including a magnetocaloric material including an alloy including iron and silicon and at least one lanthanide, and method for manufacturing said one-piece part |
US20150184900A1 (en) * | 2012-08-01 | 2015-07-02 | Cooltech Applications | One-piece part including a magnetocaloric material not including an alloy including iron and silicon and a lanthanide, and heat generator including said part |
US10101062B2 (en) * | 2012-08-01 | 2018-10-16 | Cooltech Applications | One-piece part including a magnetocaloric material not including an alloy including iron and silicon and a lanthanide, and heat generator including said part |
US10451319B2 (en) * | 2012-08-01 | 2019-10-22 | Cooltech Applications | One-piece part including a magnetocaloric material including an alloy including iron and silicon and at least one lanthanide, and method for manufacturing said one-piece part |
US20160356529A1 (en) * | 2015-06-08 | 2016-12-08 | Eberspächer Climate Control Systems GmbH & Co. KG | Temperature control unit, especially vehicle temperature control unit |
US10119731B2 (en) * | 2015-06-08 | 2018-11-06 | Eberspächer Climate Control Systems GmbH & Co. KG | Temperature control unit, especially vehicle temperature control unit |
WO2018083841A1 (en) * | 2016-11-02 | 2018-05-11 | 日本碍子株式会社 | Magnetic member for magnetic refrigeration machine |
CN115989391A (en) * | 2020-07-17 | 2023-04-18 | 三菱电机株式会社 | Magnetic refrigerating device |
Also Published As
Publication number | Publication date |
---|---|
CN103245124A (en) | 2013-08-14 |
DE102012110465A1 (en) | 2013-08-08 |
CN103245124B (en) | 2015-06-24 |
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Legal Events
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AS | Assignment |
Owner name: DELTA ELECTRONICS, INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KUO, CHI-HSIANG;WU, TIAO-YUAN;SIGNING DATES FROM 20120110 TO 20120112;REEL/FRAME:027667/0187 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |