Capillary core capillary performance detection device and method based on electric signal method

Abstract

The invention discloses a capillary core capillary performance detection device and method based on an electric signal method, and belongs to the technical field of capillary cores. The device comprises a testing container, a capillary core, a fixing frame, a resistance value measuring device, a liquid working medium, a partition plate, a liquid storage tank, a testing cable, a liquid supplementing pump, a liquid inlet valve, a liquid return valve, a liquid supplementing valve, a testing container exhaust valve, a liquid storage tank exhaust valve and a filling port. The device can be used for evaluating and testing the suction performance of the capillary core, the suction performance evaluation index of the capillary core is obtained by measuring the resistance values of the capillary core in three states of drying, natural suction and saturation, and the device has the advantages of sensitivity, high precision and easiness in operation.

Description

technical field [0001] The invention belongs to the technical field of capillary cores. Background technique [0002] The capillary core is the main source of power for the liquid working fluid in heat transfer devices such as heat pipes, loop heat pipes, and vapor chambers to return to the evaporator. The capillary structure in the evaporator must provide enough capillary force to overcome the pressure drop of vapor flow in the entire loop, the pressure drop of liquid flow, and the pressure drop caused by gravity on fluid flow, etc., to ensure the normal operation of the entire system. In addition, the material properties (such as: mechanical strength, corrosion resistance, thermal shock resistance, thermal conductivity, etc.), size design, and pore parameters (such as: porosity, average pore size, pore size distribution, etc.) It can directly or indirectly affect the heat transfer performance of the entire loop heat pipe system. The capillary core is a key component that ...

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Problems solved by technology

[0003] At present, there are not many methods for testing the capillary suction performance of the capillary core. For example, the test method mentioned in the patent CN201810238721.4 is to use the capillary core to continuously transfer the working fluid from the working medium container to the evaporation section for evaporation, and measure the weight of the working medium container. To infer the rate of the suction working fluid of the capillary core, this device has a simple structure and is easy to operate, but it is not suitable for toxic working fluids (such as mercury) and high temperature working fluids (such as sodium, lithium), and it needs to be equipped with stable heating system, the power error of the heating system will affect the capillary core pumping rate

The capillary wick test device and method mentioned in patents CN201811448782.X, CN201620725268 and CN201510821943.5 adopt the method of processing the whole heat pipe or a complete evaporator, and use external heat sources and related equipment to study external parameters to infer the relevant performance of the capillary wick , the system is more complex

Patents CN201910343657.0 and CN201910649711.4 use an external heat source to heat one end of the capillary to study the dynamic working process of evaporation and suction, and use a high-speed camera or observation to study the performance of the capillary. This method also requires a stable The heating device studies the working process of the capillary core, and does not directly make quantitative measurements on the suction performance of the capillary core

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