Abstract: A heat exchanging device includes two piping members coupled between a compressor and a evaporator, a condenser coupled to one of the piping members, and two control valves for controlling the medium to flow through either of the piping members. A tubing may receive a heat exchanging fluid and may supply the heat exchanging fluid to the evaporator and to heat exchange with the medium. The control valves may control the medium to flow either through the condenser or to flow through the other piping member without through the condenser and the capillary tube, for allowing the compressor to be continuously operated without being stopped and for increasing the working life of the compressor.

Abstract: A heat exchanging device includes a compressor for pumping the medium through a piping, and a tubing receiving a heat exchanging fluid and coupled to an evaporator, and a pump may pump the heat exchanging fluid through the tubing. The compressor includes a frequency convertible to different frequencies, to facilitate the medium through the piping and to decrease a temperature in the piping or the tubing when the temperature is increased and higher than a predetermined temperature, and to slower the medium when the temperature is decreased and lower than the predetermined temperature. A temperature sensor and a heater may be used to control the temperature in the piping or the tubing.

Abstract: A power supply device for coupling to a computer facility, includes a control device coupled to the power supply device and having a switch device and a coupler provided thereon and coupled together. A socket extension is coupled to the control device via the coupler, for coupling to peripheral facilities for the computer facility. The socket extension may be switched off via the switch device of the control device when the power supply device receives a switch off signal, and may be switched on via the switch device of the control device when the power supply device receives a switch on signal.

Abstract: Provided is a retractable luggage handle in which either tube assembly thereof comprises one or more stop sleeves each secured to a top of its tube by snapping latches of the stop sleeve into apertures of the tube. A plurality of recesses are formed on either side wall of each tube and each stop sleeve by punching for adding structural strength thereto.