Patent ID: 7227749

Claim:
An electronic apparatus comprising a housing having a plurality of electronic components therein, two or more separate heat transfer systems each thermally communicating with different one or more of said electronic components, said heat transfer systems comprising one or more heat exchangers for transferring thermal energy to and/or from said electronic components, and at least one central heat transfer bus communicating with said two or more heat transfer systems, said apparatus characterized by: one or more switching or modulating connections between said heat transfer bus and one or more of said heat transfer systems, and one or more activating components for switching or modulating said one or more connections in response to monitored thermal load or temperatures of said one or more of said electronic components and/or said heat transfer bus, or in response to a preselected temperature or thermal load of said heat transfer bus and/or one or more of said electronic components, whereby heat transfer between said heat transfer bus and one or more of said heat transfer systems is modulated or switched on or off by said activating components.