The thermal insulation testing device for building walls is suitable for testing the thermal insulation properties of various materials such as walls, insulating glass and laminated glass. The equipment can realize the method of protective heat box and calibration heat box through different configurations. Accordingly, can according to specific condition, adjust measures to local conditions ground is used, give full play to its advantage.The box body of the equipment is made of “wood frame sandwich filled with polyurethane foam”. The box body has good insulation and sealing performance, which makes the temperature control and experimental repeatability more stable. It is the first one in China. 1. standard of execution GB/T13475-2008《Thermal insulation – Determination of steady-state thermal transmission Properties – Calibrated and guard hot box》 2. Main technical parameters 1)Protective heat box method 2)Calibration heat box method

Metering box	Hot box
Measurement area：1.2×1.2 m	Measurement area：1.84×1.84 m
Structural features: the structure which is connected with the protective box by moving mode improves the insulation and sealing effect of the equipment	specifications：L2140×W780×H2140 mm
	Temperature control range: continuously adjustable from ambient temperature ~+50℃
Temperature control range: continuously adjustable from ambient temperature ~+50℃	Air temperature fluctuation in the box: ≤±0.1℃
Air temperature fluctuation in the box: ≤±0.1℃	Heating power: ≤700W
Heating power: ≤700W
Protective box	Cold box
specifications：L2140×W780×H2140 mm	specifications：L2140×W450×H2140 mm
Temperature control range: continuously adjustable from ambient temperature ~+50℃	Refrigeration power: ≤1500W
Air temperature fluctuation in the box: ≤±0.2℃ Heating power: ≤700W	Temperature control range of cold box: continuously adjustable from ambient temperature ~-20℃ (ambient temperature below 25℃)
Cold box：	Air temperature fluctuation in the box: ≤±0.2℃
specifications：L2140×W450×H2140 mm	Heating power：≤2000W
Air temperature fluctuation in the box: ≤±0.1℃
Temperature control range: continuously adjustable from ambient temperature ~-20℃	Specimen box：
The refrigeration power：≤1500W	size：L2140×W400×H2140 mm
Heating power：≤2000W	Equipment power supply: three – phase five – wire system380V   4.8kW
Specimen box:	Number of platinum resistance temperature sensors：108个
size：L2140×W400×H2140 mm	Measurement error：≤±5%
Equipment power supply: three – phase five – wire system380V  5.5kW
Number of platinum resistance temperature sensors：126
Measurement error：≤±5%

3. Temperature control system Due to large scope of knowing the conditions in the chamber test system (- 10 ℃, 20 ℃), so in the production of refrigeration system can only in accordance with the lowest temperature test requirements, at the same time consider to determine the cooling efficiency, cooling speed and temperature control accuracy requirement is very high, if the constant heating power, it is difficult to guarantee the stability of temperature, our company adopts computer PID control method, the metering box, shielding box and the temperature control of cold box is quite stable. 4. model

size	Detection method	Measuring box opening size （L×W）	Overall equipment size （L×W×H）
JW10	Calibration heat box method	1000×1000mm	1500×1500×1500mm
JW12	Protective heat box method	1200×1200 mm	2400×2500×2450mm
JW18	Calibration heat box method	1800×1800 mm	2400×2500×2450 mm