US4875342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control means for a refrigerating apparatus
Assignee: Sanden Corp
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Filing: 1987-06-15
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Granted: 1989-10-24
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Expires: 2007-06-15
Abstract
Abstract A temperature control device for a refrigerating apparatus is disclosed. The temperature control device is provided with a controlled temperature determining circuit to determine the temperature condition of the refrigerating chamber in accordance with the operation of a plurality of switches connected with the circuit. Therefore, the temperature condition in the refrigerating chamber can be controlled and maintained at a predetermined level in accordance with the operation of the temperature determining switches.
Inventors
- 👤 Susumu Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
F; F25; F25B; F25B49/00; F25D; F25D29/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/20; G05D23/24; F25D2700/00; F25D2700/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A temperature control device for controlling a refrigerating apparatus comprising: temperature level determining means for determining a plurality of desired temperature levels; temperature selecting means for selecting one of said plurality of desired temperature levels; temperature sensing means for sensing the actual temperature; comparator means for comparing said desired temperature with said sensed temperature to determine if said sensed temperature corresponds to said desired temperature; and control means for controlling said refrigerating apparatus in accordance with an output of said comparator means; wherein said temperature selecting means comprises: a plurality of temperature determining switch means for determining a desired temperature level; decoder means for decoding the state of said temperature determining switches; a plurality of analog switches, each of said analog switches being connected between said decoder and said comparator; wherein one of said analog switches is energized in accordance with an output of said decoder means to enable a representation of a desired temperature level to be provided to said comparator means.
Claim 2
Dependent Claim
163 words
A temperature control device for controlling a refrigerating apparatus comprising: temperature level determining means for determining a plurality of desired temperature levels; temperature selecting means for selecting one of said plurality of desired temperature levels; temperature sensing means for sensing the actual temperature; comparator means for comparing said desired temperature with said sensed temperature to determine if said sensed temperature corresponds to said desired temperature; and control means for controlling said refrigerating apparatus in accordance with an output of said comparator means; wherein said temperature selecting means comprises: a plurality of temperature determining switch means for determining a desired temperature level; decoder means for decoding the state of said temperature determining switches; a plurality of analog switches, each of said analog switches being connected between said decoder and said comparator; wherein one of said analog switches is energized in accordance with an output of said decoder means to enable a representation of a desired temperature level to be provided to said comparator means.
Claim 3
Dependent Claim
23 words
The device of claim 1 wherein only one of said analog switches is energized in accordance with an output of said decoder means.
Claim 4
Independent Claim
135 words
A method of controlling a refrigerating apparatus, comprising the steps of: providing means for determining a plurality of desired temperature levels; selecting one of said plurality of desired temperature levels; sensing the actual temperature level; comparing said desired temperature level with said sensed temperature level to determine the coincidence therebetween; and controlling said refrigerating apparatus in accordance with the coincidence of said desired temperature and said sensed temperature; wherein said step of selecting one of said plurality of desired temperature levels comprises manipulating a plurality of temperature determining switches and providing a decoded representation of the state of said switches to activate one of a plurality of analog switches, said switches being operatively connected between a decoder and a comparator to enable a representation of said desired temperature level to be provided to said comparator.
Claim 5
Independent Claim
135 words
A method of controlling a refrigerating apparatus, comprising the steps of: providing means for determining a plurality of desired temperature levels; selecting one of said plurality of desired temperature levels; sensing the actual temperature level; comparing said desired temperature level with said sensed temperature level to determine the coincidence therebetween; and controlling said refrigerating apparatus in accordance with the coincidence of said desired temperature and said sensed temperature; wherein said step of selecting one of said plurality of desired temperature levels comprises manipulating a plurality of temperature determining switches and providing a decoded representation of the state of said switches to activate one of a plurality of analog switches, said switches being operatively connected between a decoder and a comparator to enable a representation of said desired temperature level to be provided to said comparator.
Claim 6
Dependent Claim
149 words
A temperature control device for controlling a refrigerating apparatus comprising: temperature level determining means for determining a plurality of desired temperature levels; temperature selecting means for selecting one of said plurality of desired temperature levels; temperature sensing means for sensing the actual temperature; comparator means for comparing said desired temperature with said sensed temperature to determine if said sensed temperature corresponds to said desired temperature; and control means for controlling said refrigerating apparatus in accordance with an output of said comparator means; wherein said temperature level determining means comprises: voltage supply means for supplying a voltage to said comparator means; and a plurality of pairs of resistors connected to said voltage suppy means, wherein each pair of resistors forms a voltage divider to allow a portion of said voltage to be provided to said comparator, said portion of said voltage provided to said comparator representing a desired temperature level.
Claim 7
Dependent Claim
149 words
A temperature control device for controlling a refrigerating apparatus comprising: temperature level determining means for determining a plurality of desired temperature levels; temperature selecting means for selecting one of said plurality of desired temperature levels; temperature sensing means for sensing the actual temperature; comparator means for comparing said desired temperature with said sensed temperature to determine if said sensed temperature corresponds to said desired temperature; and control means for controlling said refrigerating apparatus in accordance with an output of said comparator means; wherein said temperature level determining means comprises: voltage supply means for supplying a voltage to said comparator means; and a plurality of pairs of resistors connected to said voltage suppy means, wherein each pair of resistors forms a voltage divider to allow a portion of said voltage to be provided to said comparator, said portion of said voltage provided to said comparator representing a desired temperature level.
Claim 8
Dependent Claim
34 words
The device of claim 4 wherein said temperature selecting means operates to enable only one pair of said plurality of pairs of resistors to provide a portion of said voltage to said comparator means.
Claim 9
Dependent Claim
21 words
The device of claim 4 wherein said temperature sensing means comprises a resistor whose resistance varies in accordance with its temperature.
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |