EP0090758A2
Expired / Lapsed
EP
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Timer speedup for servicing an air conditioning unit with an electronic control
Assignee: Carrier Corp
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Filing: 1983-03-04
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Granted: —
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Expires: 2003-03-04
Abstract
Abstract An apparatus and method is disclosed for regulating delay periods in the operation of an air conditioning system. A speedup means is provided for a serviceman to speed up the delay intervals to avoid long waiting periods between modes of operation of the air conditioning unit. Means are provided for removing the speedup means after delay periods have occurred to prevent inadvertent operation of the air conditioning system with shortened delay intervals.
Inventors
- 👤 Mario F. Briccetti
- 👤 Wayne R. Reedy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:35
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1917; F; F24; F24F; F24F1/00; F24F1/0007; F24F1/0043; F24F1/0053; F24F11/00; F24F11/30; F24F11/32; F24F11/38; F24F11/41; F24F11/50; F24F11/52; F24F11/61; F24F11/62; F24F11/63; F24F11/65; F24F11/67; F24F11/70; F24F11/72; F24F11/80; F24F11/86; F24F11/87; F24F11/871; F24F11/88; F24F2110/00; F24F2110/10; F24F2221/00; F24F2221/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A method of operating an air conditioning system incorporating a microcomputer control for controlling operation of the unit including delay intervals when switching between various operations of the unit which comprises the steps of: delaying for selected time intervals when switching between various operations of the air conditioning unit; generating a speedup signal when it is desired to decrease the length of a delay time interval; sensing the speedup signal; and modifying the step of delaying in response to the speedup signal to decrease the selected time intervals between operations of the air conditioning unit.
Claim 2
Independent Claim
95 words
A method of operating an air conditioning system incorporating a microcomputer control for controlling operation of the unit including delay intervals when switching between various operations of the unit which comprises the steps of: delaying for selected time intervals when switching between various operations of the air conditioning unit; generating a speedup signal when it is desired to decrease the length of a delay time interval; sensing the speedup signal; and modifying the step of delaying in response to the speedup signal to decrease the selected time intervals between operations of the air conditioning unit.
Claim 3
Dependent Claim
23 words
The method as set forth in claim 1 wherein the step of generating a 'signal comprises: connecting two pins of the microcomputer control.
Claim 4
Dependent Claim
34 words
The method as set forth in claim 1 which further comprises the step of: discontinuing the step of modifying the step of delaying after the air conditioning unit has been switched between separate operations.
Claim 5
Dependent Claim
81 words
The method as set forth in claim 1 wherein the air conditioning unit includes a refrigeration circuit with a compressor and may be operated with a defrost initiation delay, a defrost timer delay, a defrost termination delay and a short cycling delay; wherein the step of delaying for selected time intervals acts to achieve each delay and wherein the step of discontinuing the step of modifying includes discontinuing when the compressor is energized or de-energized or defrost is initiated or terminated.
Claim 6
Dependent Claim
81 words
The method as set forth in claim 1 wherein the microcomputer control includes a clock for emitting periodic pulses, wherein the step of delaying for selected time intervals comprises: decrementing a delay interval for each delay period at a first rate as a function of the number of clock pulses emitted; and wherein the step of modifying includes decrementing the delay interval at a second rate faster than the first rate as a function of the number of clock pulses emitted.
Claim 7
Dependent Claim
53 words
The method as set forth in claim 3 wherein the step of discontinuing includes: setting a slow speed indicator when the air conditioning unit switches between operations; detecting if the slow speed indicator has been set; and preventing the step of modifying the step of delaying if the slow speed indicator is detected.
Claim 8
Dependent Claim
30 words
The method as set forth in claim 6 and further including the step of: clearing the slow speed indicator when the step of sensing does not detect the speedup signal.
Claim 9
Dependent Claim
81 words
Apparatus for operating an air conditioning unit including a refrigeration circuit with a compressor and a microcomputer control which comprises: means for determining delay periods between various operating sequences of the air conditioning system; jumper means for generating a speedup signal; detection means for determining if a speedup signal is being generated; and means coupled to the detection means for reducing the length of the delay periods established by the means for determining in response to a speedup signal being detected.
Claim 10
Dependent Claim
81 words
Apparatus for operating an air conditioning unit including a refrigeration circuit with a compressor and a microcomputer control which comprises: means for determining delay periods between various operating sequences of the air conditioning system; jumper means for generating a speedup signal; detection means for determining if a speedup signal is being generated; and means coupled to the detection means for reducing the length of the delay periods established by the means for determining in response to a speedup signal being detected.
Claim 11
Dependent Claim
43 words
The apparatus as set forth in claim 8 wherein the microcomputer includes a clock for emitting periodic pulses and wherein the means for determining delay periods detects said pulses and decrements a timer at a predetermined rate in response to said pulses detected.
Claim 12
Dependent Claim
53 words
The apparatus as set forth in claim 8 and including: means for generating an indicator in response to specific operations of the air conditioning unit; and override means responsive to the means for generating an indicator to prevent the means for reducing delay periods from being energized notwithstanding a speedup signal being detected.
Claim 13
Dependent Claim
31 words
The apparatus as set forth in claim 8 wherein the jumper means for generating a speedup signal comprises means for connecting two pins of the microcomputer to effect the speedup signal.
References Cited (Backward Citations)
No citation records indexed.
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