Canadian Patents Database

Patent Summary

(12) Patent Application:	(11) CA 2744840
(54) English Title:	CO2 REFRIGERATION SYSTEM
(54) French Title:	SYSTEME FRIGORIFIQUE PAR CO2

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Representative Drawing

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Abstracts

English Abstract

A CO2 refrigeration system comprises a
refrigeration circuit in which circulates CO2 refrigerant
between a compression stage in which the CO2 refrigerant
is compressed. A condensation stage is provided in which
the CO2 refrigerant releases heat and is accumulated in a
condensation reservoir. An evaporation stage is provided
in which the CO2 refrigerant is expanded to a gaseous
state to absorb heat from a fluid for refrigeration, with
at least a portion of CO2 refrigerant exiting the
evaporation stage being directed to a supra-compression
circuit comprising a supra-compression stage in which the
portion of CO2 refrigerant is compressed. A heat
exchanger is provided by which the compressed CO2
refrigerant is in a heat-exchange relation with a
secondary-refrigerant circuit, such that the compressed
CO2 refrigerant releases heat to a secondary refrigerant
used for heating purposes. Pressure-regulating means
control a pressure of the compressed CO2 refrigerant
being returned to the condensation stage.

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Patent Details

(51) International Patent Classification (IPC):	F25B 9/00 (2006.01)
(72) Inventors (Country):	DUBE, SERGE (Canada)
(73) Owners (Country):	DUBE, SERGE (Canada)
(71) Applicants (Country):	DUBE, SERGE (Canada)
(74) Agent:	NORTON ROSE CANADA S.E.N.C.R.L.,S.R.L./LLP
(45) Issued:
(22) Filed Date:	2009-10-23
(41) Open to Public Inspection:	2010-04-29
Examination requested:	2011-06-22
(30) Availability of licence:	N/A
(30) Language of filing:	English

Patent Cooperation Treaty (PCT):	No

(30) Application Priority Data:
Application No. Country Date 61/107,689 United States of America 2008-10-23 61/166,884 United States of America 2009-04-06 61/184,021 United States of America 2009-06-04

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View Patent Image	Download Patent Image in PDF Format	Size of Image (KB)	Number of Pages
Cover Page	Cover Page	53	2
Abstract	Abstract	29	1
Claims	Claims	152	4
Description	Description	1,109	25
Drawings	Drawings	258	13
Representative Drawing	Representative Drawing	15	1

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