Dielectric characteristic test cavity for liquid state, gas state and gas-liquid mixing state of insulation liquid

Abstract

The invention discloses a dielectric characteristic test cavity for a liquid state, a gas state and a gas-liquid mixing state of insulation liquid. The dielectric characteristic test cavity for the liquid state, the gas state and the gas-liquid mixing state of the insulation liquid comprises a cavity barrel, a cavity cover arranged at the top of the cavity barrel and a supporting frame arranged atthe bottom of the cavity barrel, a high-voltage electrode, a testing electrode, a first insulating block, a second insulating block, a third insulating block and a fourth insulating block are arranged inside the cavity barrel; the testing electrode sleeves the outer part of the high-voltage electrode, an annular testing cavity is formed between the testing electrode and the high-voltage electrode, the inner part of the testing cavity is used for containing a to-be-tested medium, a heating source used for heating the medium is arranged inside the high-voltage electrode, the other parts insidethe cavity barrel are filled with the insulating blocks, a gas state testing hole and a liquid state testing hole communicating with the testing cavity are formed in the side wall of the cavity barrel, and the top and bottom of the cavity barrel are correspondingly connected with a liquid adjusting pipe and a gas adjusting pipe; and according to the dielectric characteristic test cavity for the liquid state, the gas state and the gas-liquid mixing state of the insulation liquid, miniaturization of size and comprehensiveness of function of the dielectric characteristic test cavity, largest solution-needing amount of a single experiment reduced are realized, and functions of vacuuming, solution adjusting, pressure testing, pressure adjusting, temperature controlling, temperature testing, andobservation can be realized.

Description

technical field [0001] The invention relates to the technical field of testing dielectric properties of insulating liquids, in particular to a testing chamber for dielectric properties of insulating liquids in liquid state, gas state and gas-liquid mixed state. Background technique [0002] Phase-change cooling technology relies on low-boiling point fluorinated liquid products, which have been maturely applied to heat dissipation technology. And compared with traditional chlorofluorocarbons, hydrochlorofluorocarbons and even hydrofluorocarbons, the fluorinated fluids developed by companies such as 3M and Chemours are more non-flammable, non-toxic, high insulation, low GWP (Global Warming Potential) and low ODP (Ozone Depletion Potential) has become one of the preferred solutions for power electronic devices and equipment cooling. [0003] However, when it is applied to high-power power electronic devices and equipment, the insulation problem caused by its high-voltage worki...

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Problems solved by technology

[0003] However, when it is applied to high-power power electronic devices and equipment, the insulation problem caused by its high-voltage working condition needs to be assessed urgently

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