Abstract: A smoke exhaust has a casing, a suction fan and an air curtain fan. The casing has an air chamber, an air duct and a smoke collecting eaves. The air chamber has a lower inlet and an upper inlet. The smoke collecting eaves is mounted on the casing. The suction fan is mounted in the casing. The air curtain fan is mounted on the eaves and is capable generating a downward air curtain. The air curtain prevents the smoke from spreading out of the smoke exhaust.

Abstract: A programmable wireless receiver capable of expanding the number of peripherals by using software and command programmers. It also supports peripherals of various computer systems. In addition, the receiver dynamically changes and/or expand the system peripherals according to user's needs. The programmable receiver features a command storage medium capable of repeatedly saving and/or setting the corresponding commands of peripherals in such command storage medium through a command programmer. Such commands are then executed by the programmable receiver in accordance with drivers, thus enabling the user to have access to various receiving interfaces so as to reduce the hardware consumption of the host computer.

Abstract: A heat-recycling air conditioner is disclosed, which includes a first loop having a compressor, a condenser and an evaporator and a second loop having a condenser cooling water inlet and an outlet, an auxiliary heat exchanger and a source of cooling water. The cooling water flows to the condenser to absorb the heat from the coolant and then the heated cooling water flows to an auxiliary heat exchanger to add extra heat to the discharge air.