Electrical water heater capable of preheating water rapidly

Abstract

The invention discloses an electrical water heater capable of preheating water rapidly. The electrical water heater comprises an inner container, a water input pipe, a water output pipe, a top layer heating pipe and a bottom layer heating pipe, wherein the water input pipe and the water output pipe are fixedly connected to the inner container, the top layer heating pipe is arranged on the top of the inner container, and the bottom layer heating pipe is arranged on the bottom of the inner container. A water inlet of the water input pipe is located on the bottom of the inner container. A water outlet of the water output pipe is located in the upper portion of the inner container. The bottom layer heating pipe is arranged on the periphery side of the water input pipe. The top layer heating pipe participates in preheating of water stored in the electrical water heater. According to the electrical water heater, the top layer heating pipe with the pipe surface load being 8 W / cm2-11W / cm2 is adopted, as the pipe surface load of the top layer heating pipe is small, the top layer heating pipe can participate in heating of the water stored in the electrical water heater completely, thus, theelectrical water heater can preheat the water in the inner container rapidly, and time waiting for preheating of the stored water is shortened greatly.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to an electric water heater capable of rapid preheating. Background technique [0002] Storage-type electric water heaters usually use two heating units, the upper and the lower. The heating unit at the bottom of the electric water heater is a preheating heating unit, which is generally used to preheat the water in the inner tank in autumn and winter when the temperature of the water injected into the inner tank of the water heater is low. The heating unit on the upper part is an instant heating unit, generally, when the water is discharged from the inner tank, the instant heating unit directly heats the outlet water immediately. [0003] However, since the surface load of the instantaneous heating unit is usually relatively large, the preheating of the water storage can only be performed through the lower heating unit, which makes the waiting time for preheating too long and...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an electric water heater that can be preheated quickly, aiming at solving the technical problem that the traditional electric water heater has too long preheating time

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