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(12) Patent: | (11) CA 2435505 |
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(54) English Title: | RAC COOLING |
(54) French Title: | REFROIDISSEMENT RAC |
Status: | Expired and beyond the Period of Reversal |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 2004-10-26 |
(22) Filed Date: | 2003-07-07 |
(41) Open to Public Inspection: | 2003-12-06 |
Examination requested: | 2003-09-05 |
Availability of licence: | Yes |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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Method of cooling oil immersed transformer or an electrical machine by heat transfer to a liquefied gas, e.g. Freon. A first heat exchanger transfers heat from oil to liquefied gas, which circulates in a closed heat pump circuit with an evaporating cycle. Finally heat is removed by airflow. This done by either using external or remotely cooler unit containing heat exchanger in communication with conventional refrigeration unit on trailer or any fixed or movable applicable method to locate near Transformer, or by directly locating the heat exchanger and/or pre-engineered evaporating coil within the transformer housing connected to outside refrigeration unit. My new Transformer Oil cooler unit can be applied to existing transformers or can be adopted in new design and manufacturing of electrical Transformers, which can have better temperature control, and better cooling for the hot spot area in Transformers. This is a practical and cost effective system to cool electrical Transformers particularly under extreme conditions in which it will boost the transformers output and enhanced its efficiency. My system has not been previously available. My invention is liquid (Oil) -to-Gas cooling method and not to be confused with current Liquid-to-liquid or any Gas-to-Gas cooling practice.
Une méthode de refroidissement d'un transformateur immergé dans l'huile ou d'une machine électrique par transfert thermique vers un gaz liquéfié, par exemple du fréon. Un premier échangeur thermique transfère de la chaleur entre de l'huile et du gaz liquéfié, qui circule dans un circuit de thermopompe fermé ayant un cycle d'évaporation. Enfin la chaleur est éliminée par débit d'air. Ceci est réalisé soit par l'utilisation d'un refroidisseur externe ou à distance contenant un échangeur thermique en communication avec une unité de réfrigération classique sur une remorque ou toute méthode applicable fixe ou mobile à placer près du transformateur, ou en plaçant directement l'échangeur thermique et/ou un serpentin d'évaporateur préfabriqué dans le boîtier du transformateur raccordé au refroidisseur externe. Ma nouvelle unité de refroidisseur d'huile et de transformateur peut être appliquée aux transformateurs existants ou peut être intégrée dans une nouvelle conception et fabrication de transformateurs électriques, pour améliorer le contrôle de la température, et mieux refroidir la zone réactive dans les transformateurs. Il s'agit d'un système pratique et rentable pour refroidir les transformateurs électriques, en particulier dans des conditions extrêmes dans lesquelles il va stimuler la production des transformateurs et améliorer son efficacité. Mon système n'était pas disponible précédemment. Mon invention est une méthode de refroidissement liquide (huile) - gaz, à ne pas confondre avec les méthodes actuelles de refroidissement liquide - liquide ou gaz - gaz.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Description | Date |
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Time Limit for Reversal Expired | 2018-07-09 |
Letter Sent | 2017-07-07 |
Maintenance Request Received | 2016-02-15 |
Maintenance Request Received | 2015-01-21 |
Maintenance Request Received | 2014-02-17 |
Maintenance Request Received | 2013-01-10 |
Inactive: Office letter | 2010-01-26 |
Inactive: Office letter | 2009-02-09 |
Inactive: Office letter | 2007-06-01 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: IPC from MCD | 2006-03-12 |
Inactive: Cover page published | 2005-01-05 |
Inactive: Prior art correction | 2005-01-05 |
Correct Inventor Requirements Determined Compliant | 2005-01-04 |
Correct Applicant Requirements Determined Compliant | 2005-01-04 |
Inactive: Office letter | 2004-10-28 |
Inactive: Cover page published | 2004-10-28 |
Grant by Issuance | 2004-10-26 |
Inactive: Cover page published | 2004-10-25 |
Inactive: Office letter | 2004-10-04 |
Inactive: Correspondence - Transfer | 2004-09-28 |
Publish Open to Licence Request | 2004-09-27 |
Publish Open to Licence Request | 2004-09-27 |
Pre-grant | 2004-07-28 |
Inactive: Final fee received | 2004-07-28 |
Notice of Allowance is Issued | 2004-07-12 |
Notice of Allowance is Issued | 2004-07-12 |
4 | 2004-07-12 |
Letter Sent | 2004-07-12 |
Inactive: Approved for allowance (AFA) | 2004-06-28 |
Inactive: Office letter | 2004-06-14 |
Change of Address Requirements Determined Compliant | 2004-06-14 |
Change of Address or Method of Correspondence Request Received | 2004-06-10 |
Amendment Received - Voluntary Amendment | 2004-06-10 |
Inactive: First IPC assigned | 2004-03-31 |
Amendment Received - Voluntary Amendment | 2004-03-26 |
Inactive: First IPC assigned | 2004-03-05 |
Inactive: IPC assigned | 2004-03-05 |
Amendment Received - Voluntary Amendment | 2004-02-18 |
Amendment Received - Voluntary Amendment | 2004-01-21 |
Inactive: Cover page published | 2003-12-29 |
Amendment Received - Voluntary Amendment | 2003-12-08 |
Application Published (Open to Public Inspection) | 2003-12-06 |
Advanced Examination Determined Compliant - paragraph 84(1)(a) of the Patent Rules | 2003-12-04 |
Letter sent | 2003-12-04 |
Inactive: Office letter | 2003-10-07 |
Letter Sent | 2003-09-22 |
Inactive: First IPC assigned | 2003-09-12 |
Inactive: Advanced examination (SO) | 2003-09-05 |
Inactive: Correspondence - Formalities | 2003-09-05 |
Request for Examination Received | 2003-09-05 |
Request for Examination Requirements Determined Compliant | 2003-09-05 |
Inactive: Advanced examination (SO) fee processed | 2003-09-05 |
All Requirements for Examination Determined Compliant | 2003-09-05 |
Early Laid Open Requested | 2003-09-05 |
Application Received - Regular National | 2003-08-27 |
Inactive: Filing certificate - No RFE (English) | 2003-08-27 |
Small Entity Declaration Determined Compliant | 2003-07-07 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Application fee - small | 2003-07-07 | ||
Advanced Examination | 2003-09-05 | ||
Request for examination - small | 2003-09-05 | ||
Final fee - small | 2004-07-28 | ||
MF (patent, 2nd anniv.) - small | 2005-07-07 | 2005-06-15 | |
MF (patent, 3rd anniv.) - small | 2006-07-07 | 2005-06-21 | |
MF (patent, 4th anniv.) - small | 2007-07-09 | 2007-03-15 | |
MF (patent, 5th anniv.) - small | 2008-07-07 | 2007-03-15 | |
MF (patent, 6th anniv.) - small | 2009-07-07 | 2009-01-05 | |
MF (patent, 7th anniv.) - small | 2010-07-07 | 2009-01-09 | |
MF (patent, 8th anniv.) - small | 2011-07-07 | 2009-12-11 | |
MF (patent, 9th anniv.) - small | 2012-07-09 | 2011-06-02 | |
MF (patent, 10th anniv.) - small | 2013-07-08 | 2013-01-10 | |
MF (patent, 11th anniv.) - small | 2014-07-07 | 2014-02-17 | |
MF (patent, 12th anniv.) - small | 2015-07-07 | 2015-01-21 | |
MF (patent, 13th anniv.) - small | 2016-07-07 | 2016-02-15 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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RAFIC ADEL CHEHOURI |
Past Owners on Record |
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None |