Forced-air cross-defrost type air-conditioning system
CA 2672747 C · Owner: Hu, Lung Tan · Inventors: Hu, Lung Tan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an air-conditioning system capable of continuous heating operation , and humidity control over an outdoor temperature range of 20 degree to negative 40 degree Celsius. , The present invention utilizes at least two sets of the heat-insulated evaporators, which alternately , generates the heat energy required for the cross-defrosting process and the air-conditioning, and said , two sets of the heat-insulated evaporators will be fed with a controlled ratio of the outdoor air and , the indoor air over different outdoor temperature ranges for ventilation and frost-prevention , purposes; a control system will adjust the frequency of the defrost-cycle to …
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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 December 16, 2005 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.