Device for detecting heat transfer coefficient of building enclosing structure on site

Abstract

The invention discloses a device for detecting the heat transfer coefficient of a building enclosing structure on site. The device comprises a box body, and a fan, a temperature difference generation device and a detection device which are arranged on the central axis of the box body sequentially, wherein the opening side of the box body is fixed on a wall to be detected; and the detection device is used for collecting the surface temperature and the heat flow of the wall to be detected. The device is characterized in that a fan cover is coaxially arranged on the central axis of the box body; the fan is positioned at one end, far away from the wall to be detected, of the fan cover and is over against the wall to be detected; the temperature difference generation device is positioned between the fan and the wall to be detected; gap is reserved at the two ends of the fan cover, so that air flow can form a circulating path; and two heat-insulating boards consisting of heat-insulating materials are arranged at one end, adjacent to the wall to be detected, of the fan cover at intervals. The device can avoids temperature fluctuation influence of heater radiation on the wall, can improve the air flow environment and can improve uniform and stable temperature distribution of the detected part, so that the test result is accurate and reliable. The device has the advantages of simple structure, wide application range and high measuring precision.

Description

technical field [0001] The invention relates to a building detection instrument, in particular to an on-site detection device for the heat transfer coefficient of a building envelope. Background technique [0002] Building energy consumption accounts for a large proportion of total social energy consumption. In western developed countries, building energy consumption accounts for 30% to 45% of total social energy consumption. However, my country's socioeconomic level and living standards are not high. Under the current situation, building energy consumption has also accounted for 20% to 25% of the total energy consumption of the society, and is gradually rising to 30%. Moreover, high building energy consumption has caused the use of a large amount of fossil fuels, which has brought more and more serious air pollution. . In order to reduce building energy consumption, the country is currently implementing building energy-saving design standards to improve the thermal insulatio...

AI Technical Summary

Problems solved by technology

However, the structure of this kind of device is complicated, and the temperature of the protective box and the metering box is difficult to be completely equal to form an adiabatic working condition, and the deflector allows the air to flow through the wall surface from one direction, which still causes the temperature of the wall to present a gradient distribution. increase the detection error

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