An energy-saving hot water generation device comprises a sealed water storage tank, a heat source generation unit disposed inside the water storage tank, and a transmission unit connected to the heat source generation unit. The water storage tank is provided to accommodate water with a normal level, and a water inlet and a water outlet are respectively provided at two ends of the water storage tank. The heat source generation unit is provided with a rotation shaft driven by the transmission unit, and a plurality of friction members passing through the rotation shaft. As the water storage tank accommodates an appropriate amount of water, the transmission unit drives the plurality of friction members to rapidly rotate for rubbing against the water to generate heat thereby heating the water to generate hot water and thus achieving purposes of energy saving and environmental protection.一種節能熱水產生裝置，主要係包含密閉狀之儲水槽及設於該儲水槽內部之熱源產生單元，以及連結於該熱源產生單元之傳動單元。其中，該儲水槽係供容置正常之水位，其兩端分別設有進水口及出水口，該熱源產生單元係設有一由傳動單元所帶動之轉軸，以及穿設於該轉軸之複數磨擦件。俾於該儲水槽容置適量的水，藉由該傳動單元的帶動，使該等磨擦件快速的旋轉與水產生相互磨擦而生熱，進而使水升溫產生熱水，從而達到節能及環保之目的。
