The two workshops of Jin Da Packaging serve as the core production areas. There are problems such as continuous equipment heat dissipation, accumulation of packaging odors, and high-temperature and oppressive heat in summer. To solve the problems of high temperature, odors, and poor ventilation, this project adopts an exhaust fan + cooling wall system for ventilation and cooling, achieving multiple goals such as efficient cooling, targeted ventilation, and low-energy operation.
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This project follows the closed-loop design logic of "inlet cooling + exhaust heating". The installation layout is as follows:
Cooling Pad Wall (Inlet Side): Installed on the windward side of the workshop wall, using 150mm thick honeycomb-shaped cooling pad paper, combined with an aluminum alloy frame. The cooling pad paper is coated with a green layer on one side, which not only increases the service life of the cooling pad paper but also effectively prevents the growth of moss.
Exhaust Fan (Exhaust Side): Symmetrically installed on the leeward side of the workshop wall, using 1530 type 304 stainless steel exhaust fans, with a single unit power of 1.5kW. The fan adopts a shutter-type automatic opening and closing design, closing the shutters automatically when the fan stops to prevent water from flowing back, and achieving strong exhaust when running.
When the system is running, it forms a complete cycle of "negative pressure drainage → cooling pad cooling → all-round ventilation", with the core process as follows:
Negative pressure formation: Exhaust fans start simultaneously, quickly extracting the hot and polluted air in the workshop, creating a stable negative pressure zone inside the workshop;
Cooling Pad Cooling: The dry and hot outdoor air is forced through the moist cooling pad paper under the pressure difference, the water film evaporates and absorbs a large amount of latent heat, causing the air temperature to drop by 5-10℃ at once, while filtering out dust particles in the air;
All-round Circulation: The cooled clean cold air flows uniformly along the workshop's movement line, covering all working areas, absorbing the heat generated by personnel and equipment, and being expelled by the exhaust fans again, achieving an air renewal frequency of 2-3 times per minute, with an air renewal efficiency of 90%.
After the system was installed and debugged, the on-site measurement showed the following core effects:
Test Index | Before Renovation | After Renovation | Improvement |
Average Workshop Temperature | 38-42℃ | 28-33℃ | Reduced by 7-10℃ |
Odor Elimination Effect | Strongly pungent | No obvious odor | Significant improvement |
Air Renewal Frequency | Unpredictable (stuffy and oppressive) | More than 2 times per minute | All-round rapid ventilation |
Unit Energy Consumption | - | Only 1/10 of traditional air conditioners | Significant energy saving |
Worker Working Comfort | Prone to fatigue， high risk of heatstroke | Feel cool， improved work efficiency | Significantly improved |
In this ventilation and cooling project for the JinDa packaging workshop, through the scientific combination of "exhaust fans + cooling wall panels", the hot and stuffy production workshop was successfully transformed into a well-ventilated and comfortable working environment. This not only solved the safety hazards during summer production, but also improved the work efficiency of the employees, and provided a replicable and cost-effective solution for ventilation and cooling in high-temperature workshops of the packaging industry.