Patent ID: 7621316
Filing Date: 2009-11-24
Classification: F28D,F28F

Abstract:
1. A heat sink for use with a heat source comprising: a plurality of heat pipes; a thermal conductive housing which accommodates the heat pipes therein, the housing having an open end and including a lower plate, an upper plate and an edge wall extending between an edge of the lower plate and an edge of the upper plate in order that an inner height of the housing is defined by a distance between the lower plate and the upper plate; and thermal dissipation fins attached to an outer surface of the upper plate of the housing; wherein an outer surface of the lower plate is thermally connected to the heat source; wherein each of said plurality of heat pipes has a first contact surface in surface contact with an inner surface of said lower plate and a second contact surface in surface contact with an inner surface of said upper plate, said first and second contact surfaces each extending along a length of said heat pipes within the housing, a distance between said first contact surface and second contact surface defining a thickness of said plurality of heat pipes said thickness corresponding to the inner height of the housing; wherein said plurality of heat pipes comprises a first portion and a second portion within the housing, said first portion being positioned closer than said second portion to the heat source; wherein within the housing, a distance between adjacent heat pipes of said plurality of heat pipes is smaller at said first portion than at said second portion; and whereby within the housing, said first contact surface of said first portion is adapted to operate as an evaporator section which receives heat from the lower plate whereas said second contact surface of said second portion is adapted to operate as a condenser section which releases heat to the upper plate.