System for controlling electronic expansion valve provided in re

Details System for controlling electronic expansion valve provided in re System for controlling electronic expansion valve provided in re

1992-12-29

1994-05-31

Wayner, William E.

Valves and valve actuation

Electrically actuated valve

Having means to produce digital pulses

236 78C, 318601, 318685, F16K 3102, G05B 1100

Patent

active

053162633

ABSTRACT:
It is possible to accurately and easily detect an abnormality in an electronic expansion valve without cutting or separating an electronic expansion valve from a cooling medium circuit. When an excitation pulse current from a drive circuit is output, a magnet rotor of an electronic expansion valve rotates. A hall element detects the position change of the magnet rotor at this time as detection pulses. The number of the detection pulses at this time is sent to a first up-down counter via an amplifier and a rectifier and is counted. The number of excitation pulses is also counted by a second up-down counter. The abnormality detection element judges that there is normal operation when the two count numbers of the first and second counters are in agreement, and that there is an abnormality when the two are not in agreement.

REFERENCES:
patent: 3842331 (1974-10-01), Hendrickson et al.
patent: 4677925 (1987-07-01), Murahami et al.
patent: 4914566 (1990-03-01), Steutermann

Affiliated with

Also associated with

Rating

System for controlling electronic expansion valve provided in re does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for controlling electronic expansion valve provided in re, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for controlling electronic expansion valve provided in re will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1623352