| 摘要 |
A water heater comprises an inner sleeve (1) and an outer sleeve (2). The upper part of the inner sleeve (1) is connected with an insulating water inlet pipe (3) leading to the inner chamber of the inner sleeve (1). The outer sleeve (2) surrounds the periphery of the inner sleeve (1) and can move axially relative to the inner sleeve (1). One end part of the inner sleeve (1) and one end part of the outer sleeve (2) are respectively connected with different heating electrodes (4). The inner sleeve (1) and the outer sleeve (2) are respectively provided with water outlet holes (5) so that a hot water supply loop is formed in the interlayer between the inner and outer sleeves. The clearance between the inner and outer sleeves is adjusted for regulating current so as to control water temperature. The water heater has a simple structure, small volume, light weight and low production cost, and can regulate the water temperature quickly in an energy-saving mode. |
