Patent US4457135A successfully refreshed from Google Patents.
US4457135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic refrigerating apparatus
Assignee: Hitachi Ltd
•
Filing: 1983-04-15
•
Granted: 1984-07-03
•
Expires: 2003-04-15
Abstract
Abstract A magnetic refrigerating apparatus including a working material for performing magnetic refrigeration, and a magnetic field system capable of varying the distribution or intensity of a magnetic field impressed on the working material. When the working material produces heat on the high temperature side, heat exchange is performed by boiling heat transfer through a refrigerant on the high temperature side; when the working material absorbs heat on the low temperature side, heat exchange is performed by condensation heat transfer through a refrigerant on the low temperature side.
Inventors
- 👤 Yoshinori Hakuraku
- 👤 Hisanao Ogata
- 👤 Takahiro Daikoku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:47
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F25; F25B; F25B21/00; F25B2321/00; F25B2321/002; F25B2321/0022; Y; Y02; Y02B; Y02B30/00; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/889; Y10S505/891
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
In a magnetic refrigerating apparatus comprising: a working material formed of magnetic material; a magnetic field system capable of periodically varying the distribution or intensity of a magnetic field impressed on said working material; and means for transmitting heat to said working material; the improvement comprising: first heat exchanging means disposed at a low temperature end face of said working material for effecting heat exchange by condensation of a refrigerant; and second heat exchanging means disposed at a high temperature end face of said working material for effecting heat exchange by boiling of another refrigerant; wherein heat exchange is effected by the condensation heat transfer through said first-mentioned refrigerant in a process in which the working material absorbs heat and by the boiling heat transfer through said last-mentioned refrigerant in a process in which the working material release heat.
Claim 2
Dependent Claim
139 words
In a magnetic refrigerating apparatus comprising: a working material formed of magnetic material; a magnetic field system capable of periodically varying the distribution or intensity of a magnetic field impressed on said working material; and means for transmitting heat to said working material; the improvement comprising: first heat exchanging means disposed at a low temperature end face of said working material for effecting heat exchange by condensation of a refrigerant; and second heat exchanging means disposed at a high temperature end face of said working material for effecting heat exchange by boiling of another refrigerant; wherein heat exchange is effected by the condensation heat transfer through said first-mentioned refrigerant in a process in which the working material absorbs heat and by the boiling heat transfer through said last-mentioned refrigerant in a process in which the working material release heat.
Claim 3
Dependent Claim
43 words
A magnetic refrigeration apparatus as claimed in claim 1, wherein said first heat exchanging means is firmly secured to a bottom surface of said working material and said second heat exchanging means if firmly secured to a top surface of said working material.
Claim 4
Dependent Claim
34 words
A magnetic refrigerating apparatus as claimed in claim 2, wherein said first heat exchanging means comprises a heat pipe comprising a heat transfer chamber having sealed therein a predetermined amount of saturated liquid refrigerant.
Claim 5
Dependent Claim
25 words
A magnetic refrigerating apparatus as claimed in claim 2, wherein said second heat exchanging means comprises a heat transfer chamber storing a liquid refrigerant therein.
Claim 6
Dependent Claim
34 words
A magnetic refrigerating apparatus as claimed in claim 2, wherein said second heat exchanging means comprises a heat pipe comprising a heat transfer chamber having sealed therein a predetermined amount of saturated liquid refrigerant.
Claim 7
Dependent Claim
147 words
In a magnetic refrigerating apparatus comprising: a working material formed of magnetic material; a magnetic field system capable of periodically varying the distribution or intensity of a magnetic field impressed on said working material; and means for transmitting heat to said working material; the improvement comprising: first heat exchanging means disposed at a low temperature end face of said working material for effecting heat exchange by condensation of a refrigerant; second heat exchanging means disposed at a high temperature end face of said working material for effecting heat exchange by boiling of another refrigerant; and third heat exchanging means connected to said first heat exchanging means via a heat exchanger, said third heat exchanging means comprising a chamber for receiving equipment to be cooled and a liquid refrigerant contained in said chamber whereby said equipment can be cooled by the heat absorbing action of said working material.
Claim 8
Dependent Claim
147 words
In a magnetic refrigerating apparatus comprising: a working material formed of magnetic material; a magnetic field system capable of periodically varying the distribution or intensity of a magnetic field impressed on said working material; and means for transmitting heat to said working material; the improvement comprising: first heat exchanging means disposed at a low temperature end face of said working material for effecting heat exchange by condensation of a refrigerant; second heat exchanging means disposed at a high temperature end face of said working material for effecting heat exchange by boiling of another refrigerant; and third heat exchanging means connected to said first heat exchanging means via a heat exchanger, said third heat exchanging means comprising a chamber for receiving equipment to be cooled and a liquid refrigerant contained in said chamber whereby said equipment can be cooled by the heat absorbing action of said working material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |