Abstract: A reverse osmosis water treatment system includes a tube connecting unit 10 having a water incoming end 102, a water outgoing end 103, and a diaphragm 104 having a check valve 108 therein to allow water to flow directly from the incoming end to the outgoing end. In operation, water flows from the tube connecting unit through-hole 105 and into preliminary filtering units 2 and membrane unit 3 via the pipe assembly 1. Wastewater from the membrane unit drain end 31 is then routed back to the tube connecting unit via pipe assembly 42 and through-hole 106. A faucet 5 is provided at the water outgoing end to deliver water for non-drinking uses. By virtue of issuing water from the outgoing end, the membrane is washed and cleaned. Accordingly, the amount of discharged wastewater is greatly reduced so that water resources are conserved and the useful life of the membrane is prolonged.

Abstract: A cooling type cold wind fan assembly including a coolant reservoir containing a coolant, a cooling cylinder being disposed in the coolant reservoir, a top end of the cooling cylinder being attached to the cold interface of a cooling chip, and a heat-radiating fan being disposed above the hot interface of the cooling chip. A cooling circuit has one end connected under the coolant reservoir, and includes a solenoid and a circulation pump disposed near the end of the cooling circuit. A heat-absorbing winding tube is disposed behind the circulation pump, the rear end of the heat-absorbing winding tube being connected back to the coolant reservoir via a returning tube. A blowing fan is disposed in front of the heat-absorbing winding tube with an activated carbon filter mesh disposed in front of the blowing fan.