Improved structure of air flow monitoring device for wall-hanging stove

Abstract

The invention discloses an improved structure of an air flow monitoring device for a wall-hanging stove. The improved structure is provided with two wind pressure pipes which are communicated with a negative pressure cavity and a fan drift, a positive pressure cavity and a fan drift of the air flow monitoring device respectively, and a connection part (namely negative pressure sampling opening) for connecting a negative pressure cavity wind pressure pipe with the fan drift is closer to a fan outlet (namely positive pressure sampling opening) than a connection part for connecting a positive pressure cavity wind pressure pipe with the fan drift; the pressure tested by the positive pressure sampling opening is used as positive and negative pressure difference value reference; the tested pressure difference value is unlikely to be affected by external pressure, so that potential risk produced by error operation of a wind pressure switch caused by a pressure difference judgment structure of the air flow monitoring device due to the influence of the external weather is avoided.

Description

technical field [0001] The invention relates to an airflow monitoring device for a wall-hung boiler, in particular to an improved structure of the airflow monitoring device for a wall-hung boiler capable of simultaneously detecting positive and negative pressures. Background technique [0002] At present, the household atmospheric wall-hung boilers sold and used in the market are all of the upper forced exhaust structure. The wall-hung boilers with this structure are equipped with an air flow monitoring device, usually a wind pressure switch, which is usually installed before the wall-hung boiler starts. 1. During the normal work after startup and after startup, the detection of wind pressure is carried out from time to time to ensure the safe operation of the wall-hung boiler. When the external wind pressure is too large to affect the normal performance of the wall-hung boiler, the wind pressure switch can detect the pressure in the combustion chamber of the wall-hung boile...

AI Technical Summary

Problems solved by technology

The above two methods are judged based on the external pressure, and the external pressure is usually easily affected by the weather environment, such as windy weather, etc., and the above two methods cannot accurately detect the pressure in the wall-hung boiler cavity, so the pressure The difference measurement is unstable, which can easily affect the judgment result of the airflow monitoring device, causing the air pressure switch to malfunction, thereby causing potential danger

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