Huawei inverter cooling

Description

I have 3D modeled a mount for three 120x120x38mm fans with an integrated thermostat to cool a Huawei inverter that only features passive cooling. The thermostat allows you to set the fan activation temperature, ensuring they only operate when necessary. The entire assembly is powered by 220V, eliminating the need for external power supplies.

The fans used are metal, ball-bearing models with a capacity of 160 cubic meters/hour and a noise level of 46dB. They are mounted on the support to draw in air. Since I have a Luna battery underneath that generates heat, I opted to extract the warm air instead of pushing it downwards.

I have also created a top deflector to direct the airflow forward instead of towards the ceiling.

Printed Parts

The base and deflector are printed in ABS to prevent warping from the heat generated by the inverter.

Parts to be inserted

Various blind holes are present in the fan support components. These accommodate M3 brass threaded inserts, allowing screws to be tightened without damaging the plastic.

Parts to Purchase

ARCELI W3230 AC 110 V 220 V 20A LED Temperature Controller Thermostat Control Regulator Pz1

EBM-PAPST 4650N
Alternating current (AC) axial fan, IP20, 230V, square, 119 mm, 38 mm, sleeve bearing Pz3

Alternatively, you can use much cheaper 120mm plastic fans with 220V power.

M3x55 screws Pz12 (screws secure the deflector and fans)

Free Project:

This is a completely free project, but if you feel inclined to support me, you can offer any amount you wish. Thank you 

Update

As requested, I have created a base with the thermostat housing on the opposite side. The only parts requiring printing for the left-side box configuration are the side pieces. The central piece works for both configurations. The upper deflector also remains unchanged.

The design is modular, allowing for expansion from a minimum of two fans to an unlimited number simply by printing more central pieces.

Update

I have modified the three base bodies, increasing the spacing between the fan and the vertical section, and added a cable routing channel. I noticed that if you use fans different from the ones I used, there isn't enough space for the cables. With this modification, 20AWG cables fit without issue. 

I noted the issue with these fans: Sunon DP201A A2123 X ST.

As you can see from the photos, there is now sufficient space.

Update

As requested, I have created a base with the thermostat housing on the front. The only part that needs printing for the front thermostat is the "Right Body, Front Thermostat". The rest is compatible with all configurations. The upper deflector also remains the same. The hole for the Ø20 tube-box connector remains in the same position. This allows for part replacement for those who haven't glued the components.

Update

As requested, I've created a base with the thermostat housing on the front, also on the left side. The only parts needing printing for a front left-side thermostat are the "Left Body, Front Thermostat". The rest is compatible with all configurations. The upper deflector remains unchanged. The Ø20 tube-box connector hole stays in the same position, allowing part replacement for those who haven't glued the pieces.

Update

As requested, I have created a lower profile air deflector for users with height constraints. The total height is now 93mm, compared to 133mm for the taller model. For the lower deflector, to allow for the passage of the front screws, I recommend widening the front holes with a Ø3.5 drill bit, slightly angling it for easier screw passage. Only a small amount of widening is needed. The only parts requiring printing are those of the deflector. The rest is compatible with every configuration and fully modular, from a minimum of two fans to however many you choose. Naturally, with many fans, the cable passage hole will need to be enlarged.