Impulse type mist spraying cooling device and impulse control method

A spray cooling and pulse type technology, which is applied in the direction of program control, computer control, general control system, etc., can solve the problems of influence, decrease of droplet crossing speed, strengthen the convection effect of liquid film on the heating surface, etc., and achieve the reduction of thermal resistance, High utilization rate and the effect of improving heat exchange efficiency

Pending Publication Date: 2018-09-21
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

On the one hand, this situation reduces the passing speed of the droplets, and strengthens the convection in the liquid film on the heating surface, which is also affected.

Method used

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  • Impulse type mist spraying cooling device and impulse control method
  • Impulse type mist spraying cooling device and impulse control method

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Experimental program
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Embodiment Construction

[0015] Such as figure 1 The schematic diagram of the structure of the pulse spray cooling device is shown. The pulse spray cooling device mainly includes four parts: data acquisition part, control part, circulating water part and injection part.

[0016] The data acquisition section includes data acquisition instruments and computers; the control section includes solenoid valves, circuit control boxes and water pumps; the circulating water section mainly includes two constant temperature water baths, pipelines and filters; the injection section includes nozzles, jet pumps, injection brackets, and vacuum pumps and a simulated heat source.

[0017] The vacuum pump is used to absorb the air in the closed chamber, so that each experiment can be carried out under vacuum conditions, reducing the interference of the external environment. The first constant temperature water bath introduces low-temperature cold water to maintain the ambient temperature of the chamber at a lower level...

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Abstract

The invention relates to an impulse type mist spraying cooling device and an impulse control method. A simulation heat source is fixedly arranged in an airtight chamber, the simulation heat source iscomposed of a heated copper block heat sink electric heater, water in a thermostatic waterbath in a circular water part is connected with a filter through a micro-pump, deionized water coming from thefilter enters the chamber after passing through a solenoid valve, a jet pump is connected with a nozzle, the nozzle is fixed on a nozzle bracket, the height and inclined angle of the nozzle are adjusted by adjusting the nozzle bracket, the jet pump controls jet pressure, the nozzle is located directly above the simulation heat source, a data acquisition instrument collects the temperature of thesimulation heat source and sends the temperature of the simulation heat source to a computer, and the computer conducts impulse type mist spraying cooling on the simulation heat source by conducting on-off frequency control on the solenoid valve. The thickness of the liquid film formed on the heating surface within the impulse type mist spraying cooling average time is thinner, the thermal resistance decreases, impulse type mist spraying cooling can be adjusted by changing the mass flow rate, the duty ratio and the frequency, so that the heating surface achieves an actual needed temperature.

Description

technical field [0001] The invention relates to a cooling device, in particular to a pulse spray cooling device and a pulse control method. Background technique [0002] The current experimental devices are commonly used closed spray cooling and testing devices, one is a spray cooler, and the other is a horizontal rotary drum cooked ball air-water spray cooler. [0003] When spray cooling is used in many occasions, the spray must pass through the steam to reach the heating surface. through [0004] During the process, the vapor flow rises, while the atomized liquid descends, which is opposite to the direction of the vapor flow. On the one hand, this situation reduces the passing speed of the droplets, and strengthens the convection in the liquid film on the heating surface, which is also affected. On the other hand, after the atomized liquid droplets are in contact with the steam, heat exchange also occurs, and part of the steam condenses and adheres to the surface of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L7/00B01L7/02G05B19/042
CPCB01L7/00B01L7/02G05B19/0423
Inventor 刘妮梁勇殷小明占太杰刘彩霞
Owner UNIV OF SHANGHAI FOR SCI & TECH
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