The plugs help mitigate heat loss below/beside the XY steppers, where there are big gaps leading to the back of the printer.
Print these out of TPU, they are made to fit snug.
Easy to install, flex them into place. You need to remove the side panels to install these.
Note: There are several other gaps between the chamber and elecronics, especially on each side, exposing the electronics to excess heat. Those gaps also need to be blocked to properly mitigate heat loss from the chamber.
Related Models:
Qidi Q1 Pro Exhaust Port Cover https://www.printables.com/model/877848-qidi-q1-pro-exhaust-port-cover
Qidi Q1 Pro Heat Loss Plugs
https://www.printables.com/model/878779-qidi-q1-pro-heat-loss-plugs
Qidi Q1 Pro Rear PTFE Port Cover
https://www.printables.com/model/878800-qidi-q1-pro-rear-ptfe-port-cover
Qidi Q1 Pro Rear TPU Seal
https://www.printables.com/model/886627-qidi-q1-pro-rear-tpu-seal
The author marked this model as their own original creation.