Title:
ICE BANK CONTROL WITH VOLTAGE PROTECTION SENSING
Document Type and Number:
WIPO Patent Application WO2000009960
Kind Code:
A3
Abstract:
The present invention is an apparatus and method that regulates the size of an ice bank (50) and that prevents short cycling of the compressor (30) therefor and operation thereof at undesired voltages. A microprocessor based control circuit (10) includes a circuit for sensing line voltage (14) combined with an ice bank sensing circuit (18, 20). The ice bank sensing circuit is of the conductivity sensing type wherein the electrical conductivity between two probes (P1, P2) is sensed. The microprocessor (16) continually monitors the probes (P1, P2) to determine if refrigeration is needed or not, and continually senses the line voltage to determine if that voltage is within the design limits of the refrigeration compressor (30). The voltage sensing circuit (14) can also sense if power has been interrupted where the voltage drops to zero.
More Like This:
Inventors:
ZHANG MING (US)
SHANNON JOSEPH W (US)
JONES BRIAN (US)
SHANNON JOSEPH W (US)
JONES BRIAN (US)
Application Number:
PCT/US1999/018366
Publication Date:
May 11, 2000
Filing Date:
August 12, 1999
Export Citation:
Assignee:
IMI CORNELIUS INC (US)
ZHANG MING (US)
SHANNON JOSEPH W (US)
JONES BRIAN (US)
ZHANG MING (US)
SHANNON JOSEPH W (US)
JONES BRIAN (US)
International Classes:
B67D1/08; F25D21/02; F25D31/00; (IPC1-7): F25C1/08
Foreign References:
| US5022233A | 1991-06-11 | |||
| US2632308A | 1953-03-24 | |||
| US3496733A | 1970-02-24 | |||
| US3502899A | 1970-03-24 | |||
| US4011733A | 1977-03-15 | |||
| US4497179A | 1985-02-05 | |||
| US4754609A | 1988-07-05 |
Download PDF: