HPbladeC7000Server fan modification for outdoor labor to relieve heat

(This project has certain risks, please do not imitate without basic knowledge!)

1、 Project inspiration: There are a large number of retired server equipment for sale on the second-hand trading platform "Xianyu", priced at tens of yuan. The high-power DC power supply and cooling fan used in the servers have advantages such as much higher power than market products and high reliability. If they can be modified and used, it can not only reduce the cost of maker production, but also contribute to the environmental protection cause of reducing electronic waste pollution.

The power of handheld fans on the market is generally around5WThe following cannot meet the summer heat relief needs in Guangdong

The power of this product has reached200WCan meet the needs of long-term outdoor work in hot weather

2、 Material used: HPbladeC7000Server fan（40Yuan)

Introduction: This product is a high-power ducted cooling fan used on HP servers (advantage: ducted fans can generate greater lift than isolated fans of the same diameter),And the fan ring is enclosed in the duct,Can block the outward propagation of fan aerodynamic sound,It has a compact structure and high safety. ）, with higher power than the cooling fan of a typical home computer20About times. Some enthusiasts have changed it to use barbecue blowers, car turbochargers, model aircraft engines, etc

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2、12AWGSilicone wire (per meter)5Yuan)

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3、 XT60High current plug (one male and one female)3Yuan)

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4、2.8mmWooden boards are used for laser cutting of shells

5、704Heat-resistant adhesive

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4、 production process

Issues to be addressed: power supply, safety protection, and ease of use

Power supply issue: This fan was originally designed to be powered by a high-power DC power supply, rated12V 16.5AInput, it is difficult to change to mobile use, so power is used18650Lithium battery production3skewer3And battery pack

Problem: The original design was fixed12VPower supply, and the voltage range of the three string battery pack is9.6~12.6VIs there a risk of burning?

answer:12VThe withstand voltage of the circuit should be at least16VAnd the voltage of industrial products must be able to withstand it10%Floating, so there's no need to worry

Question: The server's connector is an industry product that is difficult for individuals to purchase. How can it be solved?

Answer: It is common and easy to purchase to directly solder the input end of the circuit boardXT60interface

Problem: The speed of the ducted fan reaches30000rpmVery dangerous, how to ensure safety?

answer: Install a protective net for laser cutting

         This device was originally designed to work in a clean environment in the server room, not for independent use. How can it prevent dust and splash damage?

Answer: Install laser cutting wooden shell and anti slip pad

Question: The server power supply is protocol communication, and it cannot be started by simply adding power. How can it be started offline?

Answer: Refer to the circuit diagram. Short circuit the welding wire to start the signal wire and force it to start. The welding switch controls the high and low speed adjustment

1、 Weld the main power line, start signal line, and speed control line according to the wiring diagram

2、 Design laser cutting drawings

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exportpltAfter formatting, uselasercadSoftware conversion topwj5Format, set carving and cutting power, cut on the machine, assemble and install the fan, cable switch, etc704fixed

Design drawing attachments

Images (available on the forum)BUGDirectly uploading prompts are illegal, sorry

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