Adaptive defrost control for heat pump system

Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

62128, F25D 2106

Patent

active

045733260

ABSTRACT:
A microcomputer based defrost control for a heat pump system that "learns" from previous defrost cycles to achieve optimum defrost control at each of a plurality of outdoor temperature ranges, even if the heat pump system operating parameters change due to system aging. At the conclusion of each defrost cycle, the control determines the differential temperature between the outdoor ambient air and the outdoor heat exchanger and compares that value to a value stored in microcomputer memory representing a previous best such post-defrost differential temperature for the same ambient air temperature range. The control then calculates a defrost differential temperature initiate value, corrected to compensate for any loss of defrost performance indicated by the current post-defrost cycle differential temperature. After a period of time during which a number of defrost cycles have occurred, the minimum post defrost differential temperature value for each ambient temperature range becomes the best performance measure of the defrost cycle for the heat pump system. The stored minimum values are reset to zero when the control and heat pump system are deenergized. When the system is again turned on, new optimum defrost initiate values are again determined over a period of time. In addition, various default conditions cause the control to initiate an extended defrost cycle. The control is programmed to alert the operator by lighting a lamp on the thermostat should such a fault condition occur.

REFERENCES:
patent: 3950962 (1976-04-01), Odashima
patent: 4104888 (1978-08-01), Reedy et al.
patent: 4373349 (1983-02-01), Mueller
patent: 4406133 (1983-09-01), Saunders et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Adaptive defrost control for heat pump system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive defrost control for heat pump system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive defrost control for heat pump system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1588644

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.