Electric water heater with high hot water output rate and constant-temperature water outlet function

Abstract

Provided is an electric water heater with the high hot water output rate and the constant-temperature water outlet function. A diaphragm (9), a hot water circulating opening (7), a cold water opening (13) and a hot water opening (20) are formed in the middle of an inner container of a water heater body; a flow sensor (1), a heater (2), a water pump (4), a three-position three-way valve (5) and a flow sensor (6) are arranged outside the inner container of the water heater body; the inner container of the water heater body is divided by the diaphragm (9) into a cold water bin (15) and a hot water bin (16), and the cold water bin (15) and the hot water bin (16) are used for storing cold water and hot water respectively; the diaphragm (9) is of a flexible structure, and has three characteristics that pressure can be transmitted, the diaphragm can extend along with volume changes of the cold water and volume changes of the hot water in the inner container, and the diaphragm can be tightly attached to the inner wall of the inner container so that all the cold water or all the hot water can be pressed out; due to the fact that the cold water and the hot water are separated through the diaphragm (9), the cold water and the hot water cannot be blended, the constant-temperature water outlet function is achieved, and the effect that the hot water in the hot water bin (16) is completely output is achieved.

Description

technical field [0001] The invention relates to a household storage type electric water heater. Background technique [0002] Existing electric water heaters generally have the deficiencies in the following three aspects. [0003] The hot water output rate is low. The existing electric water heater only has one water storage tank. When using hot water, an equal amount of cold water is also injected into the water storage tank at the same time. When the cold water and hot water are blended, the water temperature in the water storage tank will drop, and the temperature will be <45°C. The use value of hot water is not high, so the energy consumed by heating the cold water to 45°C cannot be output, which reduces the hot water output rate. This structure leads to the low hot water output rate of existing water heaters. The national standard GB21519-2008 requires a first-level energy efficiency hot water output rate of only 0.7, and a fifth-level energy efficiency is only 0.5....

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Problems solved by technology

[0005] There is a lack of safety protection measures to prevent the temperature of the outlet water from be...

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