US4058254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-monitoring and control system
Assignee: Danfoss AS
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Filing: 1975-07-11
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Granted: 1977-11-15
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Expires: 1995-07-11
Abstract
Abstract The invention relates to a system for measuring or controlling the thermal comfort in spaces used by living beings. In operation an output signal is produced which indicates whether or how much the actual thermal conditions in the space differ from comfort conditions and this output signal may be used to control the comfort conditions in the space. The sensing means takes into account the same conditions as does a living being with respect to convection heat, radiation heat and the heat produced by metabolism. The last mentioned heat might be set in accordance to the activity level of the living being. The surface temperature of the sensing means is compared with a comfort temperature set by a second setting means. If the first setting means is set to a higher heat supply, the second setting means is simultaneously set to a lower comfort temperature and vice versa.
Inventors
- 👤 Knud Julius Hallgreen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:27
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1927; G05D23/193; G05D23/1932; G05D23/1934
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A system for controlling the thermal comfort in a space used by living beings comprising sensing means adapted to be influenced by convection heat and to receive and deliver radiant heat, first adjustable setting means for continuously supplying heat energy to said sensing means corresponding to an expected activity level so that its surface temperature is above ambient temperature, first indicator means for indicating the temperature of said sensing means, second adjustable setting means for selecting a desired comfort temperature setting, second indicator means associated with said second adjustable setting means for indicating said desired comfort temperature setting, and means for the common setting of said first and second setting means so that an increase in the heat energy supplied to said sensing means corresponds to a lowering of said desired comfort temperature setting and vice versa; said first and second indicating means being subject to comparison to control the thermal input to said space.
Claim 2
Independent Claim
155 words
A system for controlling the thermal comfort in a space used by living beings comprising sensing means adapted to be influenced by convection heat and to receive and deliver radiant heat, first adjustable setting means for continuously supplying heat energy to said sensing means corresponding to an expected activity level so that its surface temperature is above ambient temperature, first indicator means for indicating the temperature of said sensing means, second adjustable setting means for selecting a desired comfort temperature setting, second indicator means associated with said second adjustable setting means for indicating said desired comfort temperature setting, and means for the common setting of said first and second setting means so that an increase in the heat energy supplied to said sensing means corresponds to a lowering of said desired comfort temperature setting and vice versa; said first and second indicating means being subject to comparison to control the thermal input to said space.
Claim 3
Dependent Claim
27 words
A system according to claim 1 in which said surface of said sensing means has a radiant absorption coefficient which corresponds to that of a living being.
Claim 4
Dependent Claim
48 words
A system according to claim 2 in which said sensing means and said first and second indicator means are in a bridge circuit, said sensing means being an NTC-resistance in one branch and said second setting means being a rheostat in a second branch of said bridge circuit.
Claim 5
Dependent Claim
20 words
A system according to claim 3 in which said first setting means controls the supply voltage of said bridge circuit.
Claim 6
Dependent Claim
23 words
A system according to claim 3 in which said first setting means controls the current through a heater arranged near said sensing means.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |