Cold-hot box type heat transfer coefficient detecting instrument

Abstract

Present invention refers to Cold heat tank type heat transmission coefficient detect instrument, belonging to energy-saving site equipment for detecting building fender structure heat transmission coefficient. Detection instrument includes heat box, cold box, control apparatus, refrigerator, and heater etc. The require solved problems are 1, building fender structure site detection must be done at all seasons. 2, air temperature in heat box outer-sync with indoor air temperature makes large error of test result. Air temperature in heat box is finely controlled. 4, instrumental interference-resisting ability should be enhanced. Solution scheme is 1, adopting cold box reducing outdoor testing air temperature, 2, Adopting same error high precision temperature sensor, 3, heat box temperature control system adopting PID temperature control regulatory system and blur rule operation, adopting high-speed, high resolution AD conversion system as power consumption counting device, 4, system design adopting modular structure and separating strong and weak electricity.

Description

1. Technical field [0001] The heat transfer coefficient detection of the building envelope is an important part of the building energy saving test. The heat transfer coefficient of the envelope is measured by measuring the heat transfer per unit area of ​​the envelope and the temperature difference between the inside and outside of the heat box. The hot and cold box-type heat transfer coefficient detector uses a single-chip microcomputer to control various external input and output signals, and applies PID and digital filter technology to improve the reliability of the system. There is no need to be on duty during the detection process, and the measurement results of the whole process are automatically saved; another communication interface can upload the measurement results to the computer, which is convenient for data processing and storage. [0002] This instrument is suitable for on-site energy-saving detection of building envelope structures, and realizes the detection of...

AI Technical Summary

Problems solved by technology

At present, the technologies used for on-site inspection of energy-saving buildings at home and abroad mainly include heat flow meter method and infrared thermal imaging method. The heat flow meter method must be used to test the heat transfer coefficient of the enclosure structure on the spot, which must be carried out in the coldest month of the heating period, and each heat flow meter test It is a point, the effective working area is small, and the measurement accuracy is poor; the thermal imaging method must test the thermal performance of the building with a heat source indoors, and the test result is a thermal defect, that is, which parts are made of thermal insulation Defects prevent quantitative measurement of the thermal performance of the building envelope

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