Nozzle to measure air flows

prusaprinters

<p>New nozzle to measure ventilation air flows in grids of 600x150 mm maximum. Adapted to the testo 405i meter (Surely you can use other probes).</p><p><img class="image_resized" style="width:95.82%;" src="https://media.printables.com/media/prints/316320/rich_content/897da005-72da-400e-9779-f16d8d60f280/600x150_2d.jpg#%7B%22uuid%22%3A%22ef2f5148-9dfe-4caa-9ea1-222308553ee3%22%2C%22w%22%3A2976%2C%22h%22%3A3096%7D"></p><figure class="image image_resized" style="width:31.1%;"><img src="https://media.printables.com/media/prints/316320/rich_content/5c4a38ea-82d1-4cae-8ca3-ed7e86dcbbaf/20221112_193714.jpg#%7B%22uuid%22%3A%2202b5b507-5eaa-4ef7-b55b-a5f833e9da56%22%2C%22w%22%3A2580%2C%22h%22%3A2328%7D"></figure><p>&nbsp;</p><p>The nozzle is divided into 5 parts that must be glued together.</p><p>The layer height is 0.25mm, in general. In the <strong>con_entrada.stl</strong> piece, I have configured two zones with variable layer height (reduced to 0,15 mm) to improve the geometry.</p><figure class="image image_resized" style="width:79.05%;"><img src="https://media.printables.com/media/prints/316320/rich_content/30b2d74c-e47e-4b0e-a2e3-10ec94605c3f/h_variable.jpg#%7B%22uuid%22%3A%22e33c3afe-e430-491b-b586-9cada4f87cf3%22%2C%22w%22%3A1911%2C%22h%22%3A1008%7D"></figure><p>&nbsp;</p><p>In the “<strong>central.stl</strong>” and "<strong>lateral.stl</strong>" pieces I have added an auxiliary geometry to avoid the possible warping. Must be cut.</p><figure class="image image_resized" style="width:57.99%;"><img src="https://media.printables.com/media/prints/316320/rich_content/a3b18b92-45f9-4151-8793-dc569aff4d51/aux_central.jpg#%7B%22uuid%22%3A%22f7d6bce9-ebb6-4f50-b235-82530a437b28%22%2C%22w%22%3A1218%2C%22h%22%3A926%7D"></figure><figure class="image image_resized" style="width:56.07%;"><img src="https://media.printables.com/media/prints/316320/rich_content/01c8c129-9102-42fd-b211-bec74901f6ca/aux_lateral.jpg#%7B%22uuid%22%3A%224cbbb541-020f-48c1-9a1e-b0cd008a0e2d%22%2C%22w%22%3A1211%2C%22h%22%3A889%7D"></figure><p>&nbsp;</p><p>A plastic cable gland (thread size PG11) can be attached to fix the probe.</p><figure class="image image_resized" style="width:34.92%;"><img src="https://media.printables.com/media/prints/316320/rich_content/714fd052-85a8-4981-ad77-ccf1e656756b/20221112_193345.jpg#%7B%22uuid%22%3A%22269bc8ed-be5a-43e0-9f17-cfc4ff08390b%22%2C%22w%22%3A4128%2C%22h%22%3A3096%7D"></figure><p>&nbsp;</p><p>A self-adhesive rubber joint (EVA, Neoprene or similar) can be placed to adjust the nozzle to the grid.</p><figure class="image image_resized" style="width:43.07%;"><img src="https://media.printables.com/media/prints/316320/rich_content/9c7b4006-37fb-4bdc-aff4-321f72c99674/captura-de-pantalla-2022-11-12-205907.jpg#%7B%22uuid%22%3A%22e24e6c0b-ea7a-416d-bdf7-4e8902b673e5%22%2C%22w%22%3A906%2C%22h%22%3A726%7D"></figure><p>The maximum flow that can be measured (30 m/s) is limited by the probe (testo 405i in this case). This probe also measures air temperature in the range of -20 to +60ºC</p><p>The nozzle is designed to be used in the ventilation of homes, with relatively low flow rates.</p><p><strong>NOTE</strong>: The measurement result should be considered as a reference. I have not yet performed any verification of this nozzle for different grates in the laboratory.</p>