Refrigeration system with heat reclaim and efficiency control modulating valve
CA 2199929 C · Owner: Dube, Serge · Inventors: Dube, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high-efficiency refrigeration system (10) with total heat reclaim capacity comprises one or more compressors (11) for compressing a refrigerant gas to a desirable operating pressure. A bi-directional valve (14) communicates the compressed gas from the compressor (11) to condensers (19) for cooling the gas, when required or to, heat reclaim coils (21-23) to extract heat from the gas for heating air locally. A modulating valve (40) adjusts the pressure of the refrigerant gas at the compressor (11) and dependent on a monitored parameter. A refrigerant liquid/gas reservoir (28) receives liquid and vapor gas from the condensors (19) and the heat exchange coils (21-23) independently from one …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 13, 1997 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.