The heat exchange is conducted by heat conduction and radiation.

A thermostatic controller (26) is in thermal communication with the heat radiating plate for controlling a flow of heat to the heating element (16).

The heat exchanger can be installed, for example, on the heat absorbing part and the heat radiating part of a Stirling engine.

A heat radiating plate (18) is provided in thermal communication with and configured to receive heat from a heating element (16).

The air inlet (12a) or outlet (12b) of the heat radiation passage is connected to the air duct.

As a result, hot air is concentrated to the second heat radiation fin member (17).

To provide a portable blower having excellent battery heat radiating properties.

A semiconductor package whose durability against heat generation of a semiconductor is increased and whose heat radiation characteristics are enhanced.

To achieve the effect equal to a conventional level, the surface area of the heat radiation fins (18) can be smaller.

The electric unit (19) for humidity adjustment has heat radiation fins (19a) for radiating produced heat and is placed in an air path in the casing (80) for temperature adjustment.

FIR is low-frequency, clean heat radiation with longer wavelength.

Since a large part of an ear is exposed to the atmosphere, sufficient heat radiation is ensured and surrounding sound is heard without being attenuated.

The difference in temperature between the second heat radiation fin member (17) and the environment of the fin member (17) increases to create the chimney effect.

The LED daylight lamp is good at heat radiating, and has good effect of LED secondary light distributing.

LED’s produce light in a very narrow wavelength range and do not directly emit heat radiation.