Dust-proof and moisture-proof device for high-precision regulation and control of ambient temperature of precision instrument

Abstract

The invention provides a dust-proof and moisture-proof device for high-precision regulation and control of the ambient temperature of a precision instrument. The device comprises a dual-channel PID temperature controller, a temperature control circuit, a temperature measurement module, a sealed environment box, a temperature transfer fan, a semiconductor thermoelectric module TEC, cooling fins, a filter screen, a reserved window and an instrument base. According to the device, the temperature in the sealed environment box is obtained through the temperature measurement module, and the PID temperature controller controls the temperature control circuit to enable the semiconductor thermoelectric module TEC to work in a refrigeration or heating mode, so that the temperature of the sealed environment box is accurately regulated and controlled. As the device only exchanges heat with the outside and does not exchange substances, a long-term stable temperature, humidity and dust-free environment can be provided for a laser or other temperature-sensitive precision instruments. The temperature control device provided by the invention is compact in structure, stable in performance, low in power consumption and high in temperature control precision, and can improve the performance stability and measurement precision of a precision instrument and prolong the service life of the precision instrument.

Description

technical field [0001] The invention belongs to the field of environmental temperature control of precision instruments, and in particular relates to a dust-proof and moisture-proof device for high-precision control of the environmental temperature of precision instruments. Background technique [0002] Since the working environment temperature of the laser will affect the spectral stability of the output laser, in an environment with unstable temperature, the change of the ambient temperature will interfere with the operation of the laser, and the change of the ambient temperature will cause the drift of the laser wavelength and power, which will affect the use of the laser . During laser pumping, the drift of the laser wavelength will affect the absorption probability of atoms and molecules to the incident light, and the power drift will affect the pumping efficiency. In addition, changes in ambient temperature will also affect the working status of optical components in ...

AI Technical Summary

Problems solved by technology

The above two systems have many components, long implementation period, and complex data processing methods, and both can only adjust the temperature of the laser, but cannot control the ambient temperature of the laser.

In order to ensure the stability of the ambient temperature of temperature-sensitive devices such as lasers, most of the existing technologies use the method of making the entire space a constant temperature and humidity laboratory. However, it has the following defects: First, the cost is high and the waste is serious. In the system, the temperature-sensitive core components usually only account for a small part of the system components; second, the system is huge and difficult to install. In many cases, such a solution is not convenient, such as field, field operations or battlefield military use ;Third, this type of solution generally requires the use of conventional air compressors for air conditioning, which cannot avoid the material exchange between the temperature-controlled space and the outside world, so dust prevention and dehumidification become a problem. If the environment where the precision instrument is located is made into a clean room, the cost will be higher , and temperature control is difficult to achieve, and the accuracy is limited; fourth, this type of solution consumes a lot of energy

[0005] Another example is the computer CPU, power amplifier and other instruments. Due to the limitation of the chip size or the large working current, the heat is serious when used. The method currently in use is to use a mechanical fan to convect the air to take away the heat. A large number of external material exchanges lead to dust collection and humidity problems, which affect the performance and service life of the device and user experience; secondly, this method cannot provide a stable working environment. The high ambient temperature leads to high chassis temperature, and the high ambient humidity leads to high chassis temperature. Humidity is high and there is little temperature control accuracy to speak of

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