Electric frost prevention observation window

Abstract

The invention relates to an electric frost prevention observation window, comprising an observation window, a heating film adhered on the inner surface of the observation window, a flange, a sealing ring and a heating control circuit; wherein the observation window is arranged on wall body by the flange and sealing ring, the heating control circuit comprises a temperature sensing device, a temperature judgement control device and a relay, and the temperature judgement control device presets a standard voltage corresponding to critical temperature of frost prevention; the temperature sensing device acquires actual temperature of the heating film and converts the actual temperature into corresponding voltage signal, and the voltage signal is transmitted to the temperature judgement control device; when the actual temperature is lower than the critical temperature, the temperature judgement control device causes the relay to be closed, the heating control circuit and the heating film form a close circuit, and the heating film is heated; when the actual temperature is higher than the critical temperature, the relay is released, and the heating control circuit and the heating film form an open circuit. The invention has good sealing effect, can effectively avoid frost formation and dew formation and can be widely applied to related fields such as environment simulation laboratory and climate simulation laboratory.

Description

technical field [0001] The invention relates to a laboratory observation window, in particular to an electric anti-frost observation window. Background technique [0002] Glass frosting is a phenomenon that often occurs on the observation window of the laboratory, especially when performing low-temperature tests, the temperature in the laboratory is low and the humidity is high, and the inner surface of the glass is easily covered with water vapor. If the temperature of the inner surface of the glass continues to drop below 0°C, frosting will occur or an ice layer will form. In order to prevent the generation of frost from affecting the observation effect, many inventions are researched around the anti-frost function of glass. For example, the Chinese invention patent specification of CN02215477.9 announced on November 20, 2002 has just disclosed such a kind of use glass support ring and the gasket on the inner ring and the outer ring at both ends to avoid "condensation" on...

AI Technical Summary

Problems solved by technology

However, the sealing effect of this kind of anti-cold bridge sealing observation window is not good, and it can play a role of anti-frost for general temperature, but when the laboratory needs to simulate high humidity, rain, ice, low temperature and other environments, this kind of observation window Still unavoidable "condensation" or "frost"

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