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|1. (WO2018218801) HEAT EXCHANGER AND PROJECTION DEVICE|
|Applicants:||APPOTRONICS CORPORATION LIMITED
|Title:||HEAT EXCHANGER AND PROJECTION DEVICE|
A heat exchanger and a projection device using the heat exchanger. The heat exchanger is provided with a step portion (31), the step portion (31) abuts against a TEC chip (401) on one side of the TEC chip (401), and is spaced apart from a heat source (2) and/or a heat sink, such that the step portion (31) is in contact with a cold surface (4022) and a hot surface (4011) of the TEC chip (401) at different times. By means of the present invention, the phenomenon of hot and cold surfaces of a TEC short-circuiting is effectively avoided, and the cooling efficiency of the TEC is improved; and with the same cooling effect, the input power of the TEC is lower, the amount of heat generated by the TEC hot surface is smaller, and the heat load a system needs to dissipate is also smaller, thereby saving energy.