0 DEG C signal generator and implementation method thereof

Abstract

The invention discloses a 0 DEG C signal generator and an implementation method thereof. The signal generator comprises a stainless steel box body, a stainless steel blind tube, a U-shaped mercury tube electric contact type temperature controller, a temperature control circuit, an operating circuit, a thermoelectric element, a heat insulation layer, a fan and a stirrer. The signal generator is characterized in that the pressure change of air above the water surface is caused by the water surface height vertical fluctuation according to the number change of ice in an ice water mixture in the stainless steel box body; through the air pressure change, the height of mercury in the U-shaped mercury tube electric contact type temperature controller in two tubes of a U-shaped tube changes; the mercury surface position can send out refrigeration, heating and operation stopping signals to the thermoelectric element and the fan through the temperature control circuit and the operating circuit. The signal generator cyclically works in a mode of refrigeration, stop and refrigeration, or a mode of heating, stop and heating; a stable 0 DEG C signal is provided. The signal generator has the advantages that the structure is simple; the cost is low; the use is not limited by environment conditions; and a plurality of 0 DEG C signals can be provided at the same time.

Description

technical field [0001] The invention belongs to the field of semiconductor thermoelectric effect, and in particular relates to a 0°C signal generator and an implementation method thereof. Background technique [0002] The working principle of the semiconductor zero point instrument is: a closed thick-walled copper container is filled with water, and the outer surface of the container is in close contact with the semiconductor thermoelectric element. The semiconductor thermoelectric element is cooled after being connected to direct current, so that the temperature of the water in the container is lowered. When the water temperature drops to a certain level, the water closest to the thermoelectric element begins to freeze. At this time, the container is in the state of ice-water mixture, and the temperature of the mixture is theoretically 0°C. As the thermoelectric element works, the amount of ice in the container gradually increases. There is also a bellows on the upper ...

AI Technical Summary

Problems solved by technology

This is not conducive to the temperature sampler quickly obtaining 0 ℃ signal;

[0009] 5. The existing zero-point instrument requires the temperature of its working environment to be greater than 0°C, which can be achieved in a general laboratory, but under some special conditions, such as low-temperature laboratories or cold fields, the temperature of the zero-point instrument The water has been frozen into ice when it is not working, and the existing zero point instrument cannot provide a 0°C signal to the outside at this time;

[0010] 6. The existing zero-point instrument uses a thick-walled copper container and a bellows thermostat as the main components. These two components have complex structures, difficult manufacturing, and high prices, resulting in high prices for the zero-point instrument.

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