US4616485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature controller for an air conditioning apparatus
Assignee: Ranco Inc of Delaware
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Filing: 1985-02-14
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Granted: 1986-10-14
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Expires: 2005-02-14
Abstract
Abstract A temperature controller for an air conditioner including a temperature sensor that provides an output temperature from the air conditioning device, and a temperature rate of change comparison circuit for providing an indication signal that the rate of change from the temperature sensor exceeds a predetermined reference rate of change indicating that the rate of temperature change from the air conditioner is less than a reference cooling rate. The indication signal from the temperature rate of change comparison circuit is input to a disabling means that disables the air conditioning device. In an embodiment, the rate of change comparison circuit is connected to the thermostat for the system to sample the air conditioning temperatures for comparison with the reference cooling rate.
Inventors
- 👤 Jimmie D. Gillett
- 👤 Ronald E. Ellis
- 👤 Michael D. Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:16
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3225; F; F24; F24F; F24F11/00; F24F11/30; F24F11/32; F24F11/38; F24F11/70; F24F11/80; F24F11/86; F24F11/88; F25; F25B; F25B49/00; F25B49/005; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
A temperature controller for an air conditioning device comprising: a temperature sensing means for providing an output temperature signal from the air conditioning device; a temperature rate of change comparison means for providing an indication signifying the rate of temperature change from the temperature sensing means exceeds a predetermined limit in comparison with a reference rate of temperature change; and disabling means for disabling the air conditioning device upon receiving the indication from the temperature rate of change comparison means.
Claim 2
Dependent Claim
80 words
A temperature controller for an air conditioning device comprising: a temperature sensing means for providing an output temperature signal from the air conditioning device; a temperature rate of change comparison means for providing an indication signifying the rate of temperature change from the temperature sensing means exceeds a predetermined limit in comparison with a reference rate of temperature change; and disabling means for disabling the air conditioning device upon receiving the indication from the temperature rate of change comparison means.
Claim 3
Dependent Claim
49 words
A temperature controller according to claim 1 wherein said temperature rate of change comparison means includes a reference rate of change generator means for receiving a sampled output temperature signal and providing a rate of change signal as a function of the magnitude of the sampled output temperature signal.
Claim 4
Dependent Claim
17 words
A temperature controller according to claim 2 wherein said reference rate of change signal is time dependent.
Claim 5
Dependent Claim
25 words
A temperature controller according to claim 3 wherein said reference rate of change is periodically adjusted in accordance with periodically received sample output temperature signals.
Claim 6
Dependent Claim
15 words
A temperature controller according to claim 4 wherein said disabling means may be externally reset.
Claim 7
Dependent Claim
27 words
A temperature controller according to claim 5 wherein said predetermined limit is exceeded when the output temperature signal is equal to the reference rate of change signal.
Claim 8
Dependent Claim
116 words
A temperature controller for an air conditioning device comprising: a temperature sensing means for providing a temperature signal representing an output temperature from the air conditioning device; a temperature sampling means for providing a sample signal representing a sampled output temperature; a reference rate of change generation means for receiving said sample signal and providing a reference signal having a predetermined rate of change; comparison means for receiving said reference signal and said temperature signal and for providing a failure indication signal representing that the temperature signal has exceeded a predetermined limit in comparison with the reference signal; and disabling means for disabling the air conditioner device upon receiving the failure indication from the comparison means.
Claim 9
Dependent Claim
116 words
A temperature controller for an air conditioning device comprising: a temperature sensing means for providing a temperature signal representing an output temperature from the air conditioning device; a temperature sampling means for providing a sample signal representing a sampled output temperature; a reference rate of change generation means for receiving said sample signal and providing a reference signal having a predetermined rate of change; comparison means for receiving said reference signal and said temperature signal and for providing a failure indication signal representing that the temperature signal has exceeded a predetermined limit in comparison with the reference signal; and disabling means for disabling the air conditioner device upon receiving the failure indication from the comparison means.
Claim 10
Dependent Claim
16 words
A temperature controller according to claim 7 wherein said temperature sensing means includes a thermistor 9.
Claim 11
Dependent Claim
54 words
A temperature controller according to claim 8 wherein said temperature sampling means is connected to a temperature trip point detector means for providing a trip point signal until the output temperature is beyond a first temperature magnitude, said trip point signal being input to said temperature sampling means for designating said sampled output temperature.
Claim 12
Dependent Claim
30 words
A temperature controller according to claim 9 wherein said temperature trip point detector means further provides said trip point signal when the output temperature is beyond a second temperature magnitude.
Claim 13
Dependent Claim
35 words
A temperature controller according to claim 10 wherein said temperature trip point detector means is connected to a switch means for engaging and disengaging the air conditioning device in response to said trip point signal.
Claim 14
Dependent Claim
15 words
A temperature controller according to claim 11 wherein said disabling means may be externally reset.
Claim 15
Dependent Claim
183 words
A temperature controller including a loss of refrigerant charge detector and further including a temperature sensor providing a temperature signal representing an air conditioner output temperature connected to a thermostat for providing an "On" signal until the output temperature is below a first temperature magnitude and providing the "On" signal when the output temperature reaches a second temperature magnitude, said thermostat connected to a switch for engaging and disengaging the air conditioning device, said loss of refrigerant charged detector comprising: a temperature sample means for providing a sample signal representing a sampled output temperature when the thermostat removes the "On" signal; a reference rate of change generation means for receiving said sample signal and providing a reference signal having a predetermined rate of change representing a predetermined reference cooling rate; comparison means for receiving said reference signal and said temperature signal and for providing a failure indication signal representing that the temperature signal has exceeded a predetermined limit in comparison with the reference signal; and disabling means for disabling the air conditioning device upon receiving the failure indication signal from the comparison means.
Claim 16
Dependent Claim
183 words
A temperature controller including a loss of refrigerant charge detector and further including a temperature sensor providing a temperature signal representing an air conditioner output temperature connected to a thermostat for providing an "On" signal until the output temperature is below a first temperature magnitude and providing the "On" signal when the output temperature reaches a second temperature magnitude, said thermostat connected to a switch for engaging and disengaging the air conditioning device, said loss of refrigerant charged detector comprising: a temperature sample means for providing a sample signal representing a sampled output temperature when the thermostat removes the "On" signal; a reference rate of change generation means for receiving said sample signal and providing a reference signal having a predetermined rate of change representing a predetermined reference cooling rate; comparison means for receiving said reference signal and said temperature signal and for providing a failure indication signal representing that the temperature signal has exceeded a predetermined limit in comparison with the reference signal; and disabling means for disabling the air conditioning device upon receiving the failure indication signal from the comparison means.
Claim 17
Dependent Claim
15 words
A temperature controller according to claim 13 wherein said disabling means may be externally reset.
Claim 18
Dependent Claim
24 words
A temperature controller according to claim 14 wherein said predetermined limit is exceeded when the output temperature signal is equal to the reference signal.
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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |