Abstract: A liquid cooling device has a main liquid block, a pump, a heat sink, and at least one auxiliary liquid block that are in fluid communications. The auxiliary liquid block has a body and a partition that separates the body into a reservoir and a heat-absorbing chamber. The reservoir and the heat-absorbing chamber communicate with and other via a through hole on the partition. Since the heat-absorbing chamber is mounted to be adjacent to an electronic component that generates heat, the fluid in the heat-absorbing chamber absorbs the heat. When the fluid in the heat-absorbing chamber vaporizes and decreases the fluid in the reservoir has a higher level and thus flows to the heat-absorbing chamber via the through hole. Therefore, the heat-dissipating ability of the liquid cooling device is increased.

Abstract: A vehicle lamp has a lamp holder, an LED array, an interior heat sink and a heat exchanger. The lamp holder is hollow and has a heat conductive portion. The LED array is mounted in the lamp holder. The interior heat sink is mounted on the LED array and has an inner conductor being attached between the LED array and the heat conductive portion. The heat exchanger is mounted on an outer side of the heat conductive portion. Therefore, the vehicle lamp can efficiently dissipate heat generated by the LED array by the interior heat sink and the heat exchanger with little or no dust entering the lamp holder and accumulating on the LED array for improved lifespan and constant heat dissipating performance.