US5088288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator
Assignee: Mitsubishi Electric Corp
•
Filing: 1990-10-09
•
Granted: 1992-02-18
•
Expires: 2010-10-09
Abstract
Abstract A refrigerator comprises a compressor including a first cylinder having an inner cylindrical surface, a piston reciprocating in the first cylinder, and a linear motor for having a.c. electric input power applied thereto to drive the piston; a cold finger including a second cylinder having an elongated inner cylindrical surface, a displacer reciprocating in the second cylinder, and a cold space and a hot space which are divided by the displacer; a temperature detector for detecting the temperature in the cold space; an electric input power decision unit for having a detection signal inputted from the temperature detector and for deciding the electric input power to be applied to the linear motor so that the electric input power grows greater and greater as the temperature in the cold space decreases; and a power source for providing the electric input power to the linear motor based on the output from the electric input power decision unit.
Inventors
- 👤 Yoshihiro Katagishi
- 👤 Takeshi Miyazawa
- 👤 Hiroyuki Kiyota
- 👤 Nobuo Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:05
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/025; F25B9/00; F25B9/14; F25B2309/00; F25B2309/001; F25B2309/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
A refrigerator comprising: a compressor including a first cylinder having an inner cylindrical surface, a piston reciprocating in the first cylinder, and a linear motor for having a.c. electric input power applied thereto to drive the piston; a cold finger including a second cylinder having an elongated inner cylindrical surface, a displacer reciprocating in the second cylinder, and a cold space and a hot space which are divided by the displacer; a temperature detector for detecting the temperature in the cold space; an electric input power decision unit for having a detection signal inputted from the temperature detector and for deciding the electric input power to be applied to the linear motor so that the electric input power grows greater and greater as the temperature in the cold space decreases; and a power source for providing the electric input power to the linear motor based on the output from the electric input power decision unit.
Claim 2
Dependent Claim
155 words
A refrigerator comprising: a compressor including a first cylinder having an inner cylindrical surface, a piston reciprocating in the first cylinder, and a linear motor for having a.c. electric input power applied thereto to drive the piston; a cold finger including a second cylinder having an elongated inner cylindrical surface, a displacer reciprocating in the second cylinder, and a cold space and a hot space which are divided by the displacer; a temperature detector for detecting the temperature in the cold space; an electric input power decision unit for having a detection signal inputted from the temperature detector and for deciding the electric input power to be applied to the linear motor so that the electric input power grows greater and greater as the temperature in the cold space decreases; and a power source for providing the electric input power to the linear motor based on the output from the electric input power decision unit.
Claim 3
Dependent Claim
23 words
A refrigerator according to claim 1, wherein the temperature detector is mounted on the outer surface of the top of the cold space.
Claim 4
Dependent Claim
22 words
A refrigerator according to claim 1, wherein the electric input power is linearly increased as the temperature in the cold space decreases.
Claim 5
Dependent Claim
25 words
A refrigerator according to claim 1, wherein the electric input power is increased in a stair-stepped manner as the temperature in the cold space decreases.
Claim 6
Dependent Claim
25 words
A refrigerator according to claim 1, wherein the electric input power is increased in a curved manner as the temperature in the cold space decreases.
Claim 7
Dependent Claim
24 words
A refrigerator according to claim 1, wherein the electric input power decision unit controls an a.c. current to be applied to the linear motor.
Claim 8
Dependent Claim
24 words
A refrigerator according to claim 1, wherein the electric input power decision unit controls an a.c. voltage to be applied to the linear motor.
Claim 9
Dependent Claim
33 words
A refrigerator according to claim 1, wherein the refrigerator is used to cool an infrared sensing element, and wherein the temperature detector is arranged in a infrared detector including the infrared sensing element.
Claim 10
Dependent Claim
21 words
A refrigerator according to claim 8, wherein the infrared sensing element is located at a position closest to the cold finger.
Claim 11
Dependent Claim
21 words
A refrigerator according to claim 1, wherein the compressor and the cold finger are separated and connected through a connecting pipe.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |