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    • 4. 发明授权
    • Storage type electric water heater having a closed circulation loop
provided with a bubble pump
    • 具有封闭循环回路的存放式电热水器,设有气泡泵
    • US4818845A
    • 1989-04-04
    • US69229
    • 1987-07-02
    • Hisao KoizumiYoshihisa Oishi
    • Hisao KoizumiYoshihisa Oishi
    • F24H1/18H05B1/02F24H1/10F24J2/00
    • F24H1/185
    • An electric storage type water heater includes a tank having cold water introduced into the lower part thereof and an upper part connected by a hot water supply pipe to a faucet. A bubble pump arranged within an external heat insulator layer enclosing the tank includes a connection pipe connecting the upper and lower parts of the tank and forming a closed circulation loop in cooperation therewith. The connection pipe has a vertically extending intermediate pipe section closed at its lower end and having its upper end and an axially intermediate portion connected to the upper and lower parts of the tank, respectively, by upper and lower pipe sections. An electric heater associated with the intermediate pipe section heats the water therein to cause circulation through the closed loop. Check valves in the upper and lower pipe sections allow water to flow only in a direction from the lower part to the upper part of the tank.
    • 蓄电式热水器包括将冷水引入其下部的罐和通过热水供给管连接到龙头的上部。 布置在包围罐的外部绝热体层内的气泡泵包括连接罐的上部和下部的连接管,并与其配合形成封闭的循环回路。 连接管具有在其下端封闭的竖直延伸的中间管段,并且其上端和轴向中间部分分别通过上部和下部管段连接到罐的上部和下部。 与中间管段相关联的电加热器加热其中的水以引起循环通过闭环。 上管道和下管道中的止回阀允许水仅在从罐的下部到上部的方向上流动。