Backflow-preventing water feeding indicating device of solar water heater

Abstract

The invention relates to a backflow-preventing water feeding indicating device of a solar water heater. The backflow-preventing water feeding indicating device is composed of a transparent connecting pipe two ends of which are provided with threads, a small backflow preventing ball and a check ring, wherein the upper end of the connecting pipe is used for placing the check ring, and the periphery of the check ring is provided with bulges for preventing the small ball from overflowing out; the diameter of the inner wall of the lower end of the connecting pipe is reduced, the small backflow preventing ball can be stayed on the lower end of the connecting pipe, the small ball floats in an upper-down manner under the water flow impulsion when water enters, and the indication action is generated; and when the water pressure is overlow, the small ball falls in the inner diameter shrinking position of the lower end of the connecting pie due to gravity, the small ball and the shrinking position are in line contact and are closely closed so as to prevent the water from backflow. The backflow-preventing water feeding indicating device provided by the invention has the advantages that the structure is simple, the installation is convenient, and the effect is very ideal after in-service use.

Description

technical field [0001] The invention relates to a solar water heater anti-backflow water supply indicating device. Background technique [0002] With the wide application of solar technology and the enhancement of environmental awareness, solar water heaters have been widely used. Most of the currently used solar water heaters adopt the same pipeline for the upper and lower water, relying on a special three-way valve to control the water in and out. However, when the water pressure is low during use, the hot water is very easy to flow back, causing hot water loss and economic loss. Those skilled in the art have developed some anti-reflux devices, but there are some drawbacks, such as the use of some flexible parts that are prone to aging, and the structure is complex and prone to failure. Contents of the invention [0003] The object of the present invention is to solve the defects in the prior art by setting a backflow prevention device at the water inlet part of the wa...

AI Technical Summary

Problems solved by technology

However, when the water pressure is low during use, the hot water is easy to flow back, causing hot water loss and economic loss

Those skilled in the art have developed some anti-backflow devices, but there are some disadvantages, such as the use of some flexible parts that are easy to age, and the structure is complex and prone to failure.

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