Method for controlling detection device for heat-insulation performance of external windows of buildings

Abstract

The invention provides a detection device for the heat-insulation performance of external windows of buildings and a method for controlling the detection device. The detection device comprises a refrigerating system, a temperature control system and a data acquisition system. The temperature control system comprises a control module, and the control module comprises a first control unit, a secondcontrol unit, a first detection unit, a second detection unit, a first determination unit and a second determination unit; the first determination unit is used for acquiring estimated heat transfer coefficients K of a test piece according to air temperatures A2 of a hot box, air temperatures A3 of the hot box, air temperatures B2 of a cold box and air temperatures B3 of the cold box; estimated heating power of the hot box can be acquired by the second determination unit according to the estimated heat transfer coefficients K of the test piece, preset test piece areas, preset hot box temperatures and preset cold box temperatures. The detection device and the method have the advantages that the detection efficiency of the detection device and the accuracy of detection data can be effectivelyimproved, the running time of the detection device can be effectively shortened, and running power consumption of the detection device can be effectively reduced.

Description

technical field [0001] The invention relates to the field of detection of building exterior windows, in particular to a detection device for thermal insulation performance of building exterior windows and a control method thereof. Background technique [0002] The thermal insulation performance testing device of building exterior windows is mainly used to detect the heat transfer coefficient of building exterior doors and windows and evaluate the thermal insulation performance of building exterior doors and windows. The current national standard GB / T8484-2008 "Classification of Thermal Insulation Performance of Building Exterior Windows and Doors and Its Testing Method" introduces in detail the energy-saving performance testing devices and testing methods of building exterior doors and windows. The energy-saving performance testing devices of building exterior doors and windows mainly include hot boxes, cold boxes, Test piece frame, electric heater, test piece, wind shield, ...

AI Technical Summary

Problems solved by technology

[0004] In order to meet the detection of thermal insulation performance of doors and windows of different buildings, in the prior art, an electric heater with a larger rated power is used in the hot box and a refrigeration system with a larger cooling power is used in the cold box for testing. The heat transfer coefficient of doors and windows, but the detection time is long, generally 7 to 8 hours, the detection energy consumption is high, and the air temperature stability in the hot box is average

For example, the hot box adopts an electric heater with a rated power of 1500W and the cold box adopts a refrigeration system with a cooling power of 800W. Although this system can meet the heat transfer coefficient detection of building exterior doors and windows with different thermal insulation properties, for building exterior windows with low heat transfer coefficient, The error of the electric heater or refrigeration system has a great influence on the detection data

For example, for a building exterior window product with a heating capacity of only 200W, assuming that the heater with a rated power of 1500W has a 1% error, that is, the heating capacity of 15W, although the value is small, there is an error of more than 5% for the heat gain of 200W; For building exterior door and window products with only 200W heating capacity, assuming that the rated power 500W heater has a 1% error, that is, the heating capacity of 5W, although the value is small, there is only a 5% error for the heat gain of 200W; for 500W heating capacity For building exterior window products, assuming that the rated power 1500W heater has a 1% error, that is, the heating capacity of 15W has only a 3% error for the 500W heat gain

In addition, in terms of energy consumption and running time of the detection device, when the hot box is operated with a heater with a rated power of 1500W, the air temperature of the hot box will stabilize for a longer period of time, and the operating energy consumption will be greater

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