1. A magnetic refrigeration device comprising:
a heat exchanger vessel of a hollow helical structure, an inside of the vessel being filled with magnetic particles having a magnetocaloric effect, the vessel having a curve oblique with respect to a center axis of a helix;
a magnetic circuit configured to generate a magnetic field, the circuit including a permanent magnet having a helical structure and a magnet yoke;
a driving unit configured to relatively move the heat exchanger vessel and the magnetic circuit so that the magnetic field can be applied to and removed from the magnetic particles;
a low temperature side heat exchanging unit independent of the heat exchanger vessel;
a high temperature side heat exchanging unit independent of the heat exchanger vessel;
a refrigerant flow device; and
a refrigerant circuit formed by connecting the heat exchanger vessel, the low temperature side heat exchanging unit, the high temperature side heat exchanging unit, and the refrigerant flow device by a pipe for circulating a refrigerant.
2. The device according to claim 1, wherein the driving unit comprises a rotational motion mechanism for causing the magnetic circuit to carry out a rotating motion with respect to the heat exchanger vessel.
3. The device according to claim 1, wherein the driving unit comprises a linear reciprocating motion mechanism for causing the magnetic circuit to carry out a linear reciprocating motion with respect to the heat exchanger vessel.
4. The device according to claim 1, wherein the inside of the heat exchanger vessel is filled with at least two kinds of magnetic particles having a different magnetic transition temperature and layered in a refrigerant flowing direction.
5. The device according to claim 1, wherein the heat exchanger vessel has a multiple helical structure in which a plurality of helical portions are combined, and the helical portions are connected in series in the refrigerant flowing direction.
6. The device according to claim 5, wherein each of the helical portions is filled with magnetic particles having a different magnetic transition temperature.
7. The device according to claim 1, wherein the helical structure has a helical angle of at least 10\xb0.
8. The device according to claim 1, wherein the magnetic particles have a particle diameter of 0.1 mm or more to 2 mm or less and are formed in a substantially spherical shape, and the volume filling ratio of the magnetic particles in the heat exchanger vessel is 40% or more to 70% or less.
9. A magnetic refrigeration system comprising:
a magnetic refrigeration device which comprises a heat exchanger vessel of a hollow helical structure, an inside of the vessel being filled with magnetic particles having a magnetocaloric effect, the vessel having a curve oblique with respect to a center axis of a helix, a magnetic circuit configured to generate a magnetic field, the circuit including a permanent magnet having a helical structure and a magnet yoke, a driving unit configured to relatively move the heat exchanger vessel and the magnetic circuit so that the magnetic field can be applied to and removed from the magnetic particles, a low temperature side heat exchanging unit independent of the heat exchanger vessel, a high temperature side heat exchanging unit independent of the heat exchanger vessel, a refrigerant flow device, and a refrigerant circuit formed by connecting the heat exchanger vessel, the low temperature side heat exchanging unit, the high temperature side heat exchanging unit, and the refrigerant flow device by a pipe for circulating a refrigerant;
a cooling unit thermally connected to the low temperature side heat exchanging unit; and
a radiating unit thermally connected to the high temperature side heat exchanging unit.
10. The system according to claim 9, wherein the driving unit comprises a rotational motion mechanism for causing the magnetic circuit to carry out a rotating motion with respect to the heat exchanger vessel.
11. The system according to claim 9, wherein the driving unit comprises a linear reciprocating motion mechanism for causing the magnetic circuit to carry out a linear reciprocating motion with respect to the heat exchanger vessel.
12. The system according to claim 9, wherein the inside of the heat exchanger vessel is filled with at least two kinds of magnetic particles having a different magnetic transition temperature and layered in a refrigerant flowing direction.
13. The system according to claim 9, wherein the heat exchanger vessel has a multiple helical structure in which a plurality of helical portions are combined, and the helical portions are connected in series in the refrigerant flowing direction.
14. The system according to claim 13, wherein each of the helical portions is filled with magnetic particles having a different magnetic transition temperature.
15. The system according to claim 9, wherein the helical structure has a helical angle of at least 10\xb0.
16. The system according to claim 9, wherein the magnetic particles have a particle diameter of 0.1 mm or more to 2 mm or less and are formed in a spherical shape, and the volume filling ratio of the magnetic particles deposited in the heat exchanger vessel is 40% or more to 70% or less.
17. The device according to claim 1, a pitch of the helical structure of the permanent magnet being the same as that of the heat exchanger vessel.
18. The device according to claim 9, a pitch of the helical structure of the permanent magnet being the same as that of the heat exchanger vessel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A foldable case having a back light comprising:
a light emitting part formed having an empty space in contact with a front inner surface of the case and a rear side surface of a liquid crystal element, for evenly distributing light;
a liquid crystal element installed at the front surface of the light emitting part, and selectively blocking the light emitted from the light emitting part to display a text or an image;
a transparent protective plate formed in contact with the front surface of the liquid crystal element to protect the liquid crystal element; and
a case for supportedly combining the light emitting part, the liquid crystal element and the transparent protective plate, reflecting the light of the light emitting part so as to be injected onto the whole surface of the liquid crystal element, and having a light transmittance hole on the section of its body so as to have a back light on a specific mark or logo of the rear surface thereof.
2. The foldable case according to claim 1, wherein the specific mark or logo are printed on a light transmittance sheet.
3. The foldable case according to claim 1, wherein the specific mark or logo are printed on a light transmitted sheet so as to be injected in an in-mold method when the case is injected to be fabricated.
4. The foldable case according to claim 1, wherein the light transmittance holes are formed having an empty space therein.
5. The foldable case according to claim 1, wherein the light transmittance holes are formed filled with a transparent material.
6. The foldable case according to claim 1, wherein the light transmittance holes are formed filled with a translucent material.
7. A foldable case having a back light, comprising:
a liquid crystal display unit for displaying a text or an image by light emitted from the light emitting part; and
light transmittance holes formed at the rear surface thereof so as for the light emitted from the light emitting part to be injected to the rear surface.
8. The foldable case according to claim 7, wherein the light transmittance holes form a specific mark or a logo.
9. The foldable case according to claim 7, wherein the light transmittance holes are through holes filled with a transparent or a translucent material.