A measuring device and method for rapidly measuring the freezing point of liquid droplets

Abstract

The invention discloses a measurement device and method for quickly measuring the condensation point of a liquid drop. The measurement device is characterized in that a main refrigeration unit, an auxiliary refrigeration, heat dissipation and cold storage unit, an ultrasonic supercooling eliminating unit, a laser transmitting and receiving unit, a temperature measuring unit, a control unit and a display unit are included; the main refrigeration unit is used for condensing the liquid drop to be measured; the auxiliary refrigeration, heat dissipation and cold storage unit is used for quickly absorbing and dissipating heat generated by the main refrigeration unit; the ultrasonic supercooling eliminating unit is used for preventing the liquid drop from generating the supercooling phenomenon; the display unit, the temperature measuring unit and the laser transmitting and receiving unit are electrically connected with the control unit separately. According to the measurement device, the ultrasonic supercooling eliminating unit is adopted for preventing the liquid drop from generating the supercooling phenomenon, and therefore the measurement accuracy is improved; in addition, phase changes of the liquid drop are shown through sudden changes of a light signal, and therefore use is convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of freezing point detection, in particular to a measuring device and method for rapidly measuring the freezing point of liquid droplets. Background technique [0002] The freezing point refers to the temperature of the phase equilibrium point where the solid phase (such as ice crystals) is precipitated when the temperature of water, aqueous solution or liquid drops to a certain value, also known as the freezing point. For many liquids, such as fuel oil, lubricating oil, organic solvents, etc., the freezing point, that is, the temperature at which the liquid state changes to a solid state, is also one of its important performance indicators. Different liquids have different freezing points. Although there are also a large number of amorphous (glassy, ​​non-crystalline) substances in nature, for most liquids, solidification is often accompanied by the formation of crystals. During solidification, a substance...

AI Technical Summary

Problems solved by technology

[0004] However, this method has the following disadvantages: 1. When the liquid reaches its freezing point (i.e., the phase equilibrium point), the new solid phase will not be precipitated in time due to the so-called supercooling, resulting in measurement errors

2. The temperature obtained by temperature measurement is strictly speaking the temperature of the container or cold trap containing the liquid, and there is an error with the real liquid temperature; 3. The measurement needs to judge the freezing point of the liquid with the naked eye, which often leads to errors

Images