US3822564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination type refrigerator
Assignee: Naniwa Sangyo Co Ltd
•
Filing: 1972-08-01
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Granted: 1974-07-09
•
Expires: 1992-08-01
Abstract
Abstract A combination type refrigerator having a freezing storage compartment provided with a heat exchanger and a cold storage compartment also provided with a heat exchanger, wherein a cooler is on-off controlled in response to the detection of a certain predetermined temperature in the cold storage compartment and the defrosting of the freezing storage compartment is effected by connecting both the heat exchangers in series and directly supplying pressurized hot gas to the heat exchanger for the freezing storage compartment. It is characterized by a heating means disposed in a suitable position within the cold storage compartment, and which heating means is capable of generating an amount of heat just sufficient to permit continuous operation of the cooler without causing any temperature rise in the cold storage compartment during the defrosting operation in the freezing storage compartment and is operated during the defrosting operation in the storage compartment.
Inventors
- 👤 K Nijo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:14
CPC Classifications
F; F25; F25B; F25B5/00; F25B5/04; F25B47/00; F25B47/02; F25B47/022; F25D; F25D21/00; F25D21/02; F25D29/00; F25D2700/00; F25D2700/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
165 words
In a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchangers, switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, and means for defrosting said freezing storage compartment by connecting both of said heat exchangers in series with a valve acting as an expansion valve between said heat exchangers and directly supplying pressurized hot gas to the heat exchanger for the freezing storage compartment, the improvement comprising: heating means provided in said cold storage compartment for generating an amount of heat sufficient to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing storage compartment, and means for operating said heating means only during the defrosting operation in said freezing storage compartment.
Claim 2
Dependent Claim
165 words
In a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchangers, switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, and means for defrosting said freezing storage compartment by connecting both of said heat exchangers in series with a valve acting as an expansion valve between said heat exchangers and directly supplying pressurized hot gas to the heat exchanger for the freezing storage compartment, the improvement comprising: heating means provided in said cold storage compartment for generating an amount of heat sufficient to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing storage compartment, and means for operating said heating means only during the defrosting operation in said freezing storage compartment.
Claim 3
Dependent Claim
172 words
In a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchanger, switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, and means for defrosting said freezing storage compartment by connecting both of said heat exchangers in series with a valve acting as an expansion valve between said heat exchangers and directly supplying pressurized hot gas to the heat exchanger for the freezing storage compartment, the improvement comprising: heating means provided in the vicinity of the heat exchanger for said cold storage compartment for generating an amount of heat sufficient to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing storage compartment, and means for operating said heating means only during the defrosting operation in said freezing storage compartment.
Claim 4
Dependent Claim
172 words
In a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchanger, switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, and means for defrosting said freezing storage compartment by connecting both of said heat exchangers in series with a valve acting as an expansion valve between said heat exchangers and directly supplying pressurized hot gas to the heat exchanger for the freezing storage compartment, the improvement comprising: heating means provided in the vicinity of the heat exchanger for said cold storage compartment for generating an amount of heat sufficient to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing storage compartment, and means for operating said heating means only during the defrosting operation in said freezing storage compartment.
Claim 5
Independent Claim
150 words
A method of defrosting storage compartment of a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means inCluding a compressor for circulating coolant through said heat exchangers, and switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, comprising, at intervals when the freezing storage department is in need of defrosting: connecting both of said heat exchangers in series through an expansion valve positioned therebetween, if said heat exchangers are not already so connected; directly supplying pressurized hot gas to the heat exchanger for the freezing compartment; and heating said cold storage compartment with sufficient heat to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing compartment.
Claim 6
Independent Claim
150 words
A method of defrosting storage compartment of a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means inCluding a compressor for circulating coolant through said heat exchangers, and switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, comprising, at intervals when the freezing storage department is in need of defrosting: connecting both of said heat exchangers in series through an expansion valve positioned therebetween, if said heat exchangers are not already so connected; directly supplying pressurized hot gas to the heat exchanger for the freezing compartment; and heating said cold storage compartment with sufficient heat to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing compartment.
Claim 7
Independent Claim
156 words
A method of defrosting the freezing storage compartment of a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchangers, and switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, comprising, at intervals when the freezing storage department is in need of defrosting: connecting both of said heat exchangers in series through an expansion valve positioned therebetween, if said heat exchangers are not already so connected, directly supplying pressurized hot gas to the heat exchanger for the freezing compartment; and heating the heat exchanger of said cold storage compartment with sufficient heat to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing compartment.
Claim 8
Independent Claim
156 words
A method of defrosting the freezing storage compartment of a combination type refrigerator having a freezing storage compartment provided with a heat exchanger, a cold storage compartment also provided with a heat exchanger, cooling means including a compressor for circulating coolant through said heat exchangers, and switch means for on-off controlling said cooling means in response to the detection of a predetermined temperature in said cold storage compartment, comprising, at intervals when the freezing storage department is in need of defrosting: connecting both of said heat exchangers in series through an expansion valve positioned therebetween, if said heat exchangers are not already so connected, directly supplying pressurized hot gas to the heat exchanger for the freezing compartment; and heating the heat exchanger of said cold storage compartment with sufficient heat to permit continuous operation of said cooling means without causing any temperature rise in said cold storage compartment during the defrosting operation in said freezing compartment.
References Cited (Backward Citations)
US2489049A
Cited
US2667757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |