What is the air tightness field detector for building doors and windows?

Building door and window air tightness field detector is mainly used for door and window air tightness field detection, which is widely used in related product manufacturers, quality inspection departments, quality inspection units, universities and research institutes.

Implementation standard:

JGJ/T 132-2009 "Testing Standard for Energy Efficiency of Residential Buildings"

JG/T？ 2 1 1-2007 On-site testing method for air tightness, water tightness and wind pressure resistance of building exterior windows

GB/T？ 7 106-2008 "Classification and Testing Methods for Air-tightness, Water-tightness and Wind-pressure Resistance of Building External Doors and Windows"

Structural features:

The equipment has the characteristics of small volume, simple structure and convenient operation. The main detection components are hot-wire gas flow sensor and high-precision differential pressure sensor, which ensures the detection accuracy of air flow and pressure data. The pressure sensor ensures the detection accuracy and resolution of airflow and pressure data, and the computer automatically collects the detection data and feeds back the control signal.

Working principle:

The static pressure box is composed of sealing plate, enclosure structure and external window, and positive pressure difference or negative pressure difference is formed on both sides of the test object through the air supply system. A measuring hole is led out of the static pressure box to measure the pressure difference, and a flow measuring device is installed on the pipeline to measure the air permeability.

1. Pre-pressurization: Before positive and negative pressure detection, apply three differential pressure pulses respectively, with the absolute value of differential pressure of 150 Pa, the pressurization speed of about 50 Pa/s. The differential pressure stabilization time is not less than 3s, and the pressure relief time is not less than1s.. Check the sealing state of sealing plate and transparent film.

2. Determination of additional permeability: pressurization step by step, with each pressure acting for about 10s, with positive pressure step by step first and negative pressure step by step. Record the measurements at all levels. Additional air permeability refers to the air permeability through the equipment, the sealing plate and the connecting joints between various parts besides the air permeability through the specimen itself.

3. Determination of total air permeability: open the inspection door of the sealing plate, remove the sealing film on the specimen, then close the inspection door and seal it for testing. The detection procedure is the same as "2". Determination of additional permeability ".