Thermal conductivity meter for vacuum glass

Abstract

A thermal conductivity meter for vacuum glass comprises an upper shell, a lower shell, a cold plate, a hot plate, a vacuum system and a control system, the cold plate and the hot plate are placed in asealed space formed by the upper shell and the lower shell, and vacuum glass to be measured is arranged between the cold plate and the hot plate; the upper shell is a flat plate, is in close contactwith the cold plate, and can serve as a radiator for the cold plate; and after the upper shell and the lower shell are closed, the formed sealed space is pumped into a high vacuum by the vacuum system, and the high vacuum has a better thermal insulation performance than the vacuum glass, and provides standard correction. The thermal conductivity meter can solve the heat dissipation problem of themeasurement hot plate and the provision problem of a correction standard plate, and has the characteristics of simple structure, convenience in measurement, and accuracy in data.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a vacuum glass thermal conductivity meter. Background technique [0002] Vacuum glass is one of the best energy-saving glasses, and its thermal insulation performance is generally expressed by the heat transfer coefficient, which can be obtained through heat conduction. Since the heat transfer coefficient of vacuum glass is very small, the error is very large when measured with an existing thermal conductivity meter. For example, when the heat transfer coefficient is less than 1, the measurement error is ±0.1. Theoretically, the heat transfer coefficient of vacuum glass The coefficient can be as small as 0.2, in which case the error of existing thermal conductivity meters is unacceptable. Although there are many devices and methods for measuring the heat transfer coefficient of vacuum glass in the prior art, such as patent applications CN02243245.0, CN200320126692.1, CN200620131674.6, C...

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Problems solved by technology

Since the heat transfer coefficient of vacuum glass is very small, the error is very large when measured with an existing thermal conductivity meter. For example, when the heat transfer coefficient is less than 1, the measurement error is ±0.1. Theoretically, the heat transfer coefficient of vacuum glass The coefficient can be as small as 0.2, in which case the error of existing thermal conductivity meters is unacceptable

Although there are many devices and methods for measuring the heat transfer coefficient of vacuum glass in the prior art, such as patent applications CN02243245.0, CN200320126692.1, CN200620131674.6, CN200710003450.6, CN201210017369.4 and CN201210111168.0, etc., but for the same thickness For thermal insulation materials, the thermal conductivity of vacuum glass is the smallest, and it is difficult to find a better thermal insulation panel than vacuum glass, so the above devices and methods cannot solve the problem of measuring the heat dissipation of the thermal panel and provide a known accurate heat transfer coefficient or heat dissipation. Therefore, it is difficult to accurately measure the heat transfer coefficient of vacuum glass in the existing technology

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