Plane capillary core evaporimeter with fin for CPL

Abstract

A planar capillary core evaporator with fin for CPL consists of base , top cover being fixed and sealed with base , isolation plate for isolation top cover to be liquid collection cavity and steam collection cavity , liquid collection cavity formed by horizontal and longitudinal grooves cross arranged and opened with liquid return inlet on it , steam collection cavity opened with vapor outlet on it , fin set on outer surface of top cover ,longitudinal steam channel connected to steam cavity on base and capillary core set between liquid collection cavity and steam channel .

Description

technical field [0001] The invention relates to a planar capillary wick evaporator for CPL. Background technique [0002] Due to the development of technology, the power of electronic devices is increasing, the degree of integration is getting higher and higher, and the heat generated per unit volume is also increasing. At the same time, the effective heat dissipation area is correspondingly reduced, so the heat dissipation problem is more serious. protrude. The capillary pumping two-phase fluid loop (CPL) developed based on heat pipe technology has the advantages of large heat transfer capacity, high temperature control accuracy, low energy consumption and good isothermal performance, and has become an ideal system for cooling electronic devices. CPL mainly includes: evaporator, condenser, liquid receiver, vapor-liquid pipeline and other auxiliary devices. CPL mainly relies on the phase change of the working fluid in the evaporator to absorb heat and the phase change in t...

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Problems solved by technology

[0003] CPL usually uses a tube evaporator. The disadvantages of the tube evaporator are: ①In order to use the tube evaporator for heat dissipation, a cold plate must be attached to contact the cold plate with the load surface to achieve the purpose of heat dissipation. This method increases The heat transfer resistance is reduced, and the heat transfer efficiency of the system is reduced; ② After the liquid enters the central channel of the evaporator, it flows into the capillary core in the radial direction and evaporates, and the generated steam flows into the channel of the tube wall, and then flows into the steam pipe through the end of the channel. When the heat load of the system changes sharply, a large amount of working fluid is vaporized. If the tube evaporator cannot replenish the evaporation in the capillary in time due to the small amount of liquid storage, it will cause insufficient liquid supply to the system. The evaporator is burnt out, resulting in system failure; ③Due to the limitation of the structure of the tube evaporator, the capillary core structure can only be sintered with powder materials, which requires special equipment to make, so the production cost is high; ④The CPL evaporator is only As the heat-absorbing element of the system, the heat dissipation is completed by the condenser, so under high power conditions, both the evaporator and the condenser must bear a large load

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