Digital display type electronic temperature relay

Abstract

The invention discloses a digital display type electronic temperature relay, which mainly comprises six parts, namely a temperature sensitive element, a mounting body, a housing, a front panel, a rear panel and a microelectronic circuit assembly. A high-level language program written into a single-chip microcomputer serves as a core control program to achieve the temperature detection, the display and other various functions. Based on the rotatable characteristics of the housing and the front panel, the requirements of various mounting positions and environments can be met. The circuit part of the electronic temperature relay has the functions of polar protection, overvoltage protection, short circuit protection and the like at the same time, so that the electronic temperature relay works stably. The failure rate of the electronic temperature relay is reduced, and the conditions of element damage and the like are avoided. The electronic temperature relay is also provided with an integrated multifunctional display nixie tube. In this way, the current temperature can be digitally displayed, and indicating lamps with two on-off outputs in the temperature units of Celsius and Fahrenheit can also be displayed on the nixie tube. The circuit of the electronic temperature relay is in the form of a multi-layer board and the housing is processed through a special process. Therefore, the ferromagnetism is achieved, and the anti-interference capability of an instrument is improved. Even in the environment with strong interference, the electronic temperature relay can still work normally. The electronic temperature relay is small in size, so that the mounting space of the electronic temperature relay is saved. As a result, the electronic temperature relay is more convenient in installation and maintenance.

Description

technical field [0001] The invention relates to a digital display electronic relay, in particular to an electronic temperature relay with a built-in or external temperature sensitive element, a digital display, and a rotatable window and casing. Applicable to the temperature detection, display and output control signal instrument of fluid transmission systems such as hydraulic pressure and lubrication. Background technique [0002] The function of the digital display electronic temperature relay in the prior art is relatively simple, and only has the functions of on-site display and switch value output. After on-site installation and positioning, the position and orientation of the display window of the instrument are fixed and cannot be adjusted, which cannot meet the installation requirements of various positions and states, and the scope of use is limited, which brings inconvenience to observation and use. If there is a short circuit in the circuit, or if the polarity of...

AI Technical Summary

Problems solved by technology

After on-site installation and positioning, the position and orientation of the display window of the instrument are fixed and cannot be adjusted, which cannot meet the installation requirements of various positions and states, and the scope of use is limited, which brings inconvenience to observation and use

If there is a short circuit in the circuit, or if the polarity of the power supply is reversed due to misoperation, it will cause damage to the instrument. Can not work normally, especially the small volume electronic pressure relays currently on the market, the above defects are more obvious

Images