Heat-preserving breather valve

Abstract

The invention relates to a heat-preserving breather valve belonging to the field of solar water heaters. The heat-preserving breather valve comprises a valve body, an exhalation valve sheet and a valve cover, wherein the valve body is provided with a valve cavity, the lower part of the valve body is narrowly contracted to form a pipe-shaped body matched and connected with an exhaust pipe, and theupper part thereof is expanded to form a valve sheet seat; the exhalation valve sheet is arranged on the valve sheet seat in a matching way and an up-and-down flapping state corresponding to the valve cavity and is provided with a through hole and an inhalation valve sheet, the through hole is arranged on the exhalation valve sheet, and the inhalation valve sheet extends to be formed at one side of the exhalation valve sheet towards the valve body, and is opened or closed accompanying with the through hole; the valve cover is matched with the valve body and shields the exhalation valve sheet,and a gap is formed between the inner wall of the valve cover and the outer edge of the valve sheet seat and communicated with the outside. The heat-preserving breather valve can operate according tothe change of the pressure difference of air inside a water storage tank or a project channel and outside air and effectively prevent the loss of heat inside the water storage tank and has the advantages of simple and reliable integral structure, easy machining and manufacture, convenient installation, low cost and economic suitability.

Description

technical field [0001] The invention belongs to the technical field of solar water heaters, and in particular relates to a heat-preserving breathing valve, which is installed on the exhaust pipe of the water storage tank of the solar water heater or on the exhaust pipe of the engineering header of the solar water heating project, and plays a role in controlling exhaust. The connection or disconnection between the trachea and the outside atmosphere. Background technique [0002] As the industry knows, no matter the water storage tank of the domestic solar water heater or the engineering header (also called the water storage tank) of the solar hot water project, an exhaust pipe must be configured, and a shape Like a mushroom-shaped exhaust cap, the side wall of the exhaust cap is provided with vent holes communicating with the outside atmosphere. When the water storage tank is in the water inlet condition, that is, when the water storage tank is in a positive pressure state, ...

AI Technical Summary

Problems solved by technology

But there are following shortcomings: one, the overall structure is more complicated, for example need to be equipped with two boxes ("inner valve box body and outer valve box body"), a pair of springs and piston rod (one of the springs is used to push the inner valve box The body is closed to the lower exhaust hole at the bottom of the outer valve box body, and the other spring is used to push the piston rod, so that the piston cap on the top of the piston rod is closed to the upper air inlet hole at the top of the inner valve box body), resulting in processing and Manufacturing difficulty increases; second, reliability is low, because a pair of springs will fatigue over time, which not only affects the actuation effect on the lower valve box body, but also affects the driving effect on the piston rod

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