Vevor 30L Ultrasonic cleaner went up in smoke - take tranducer out of series? - Page 1
Forum section: electronics / repair

author: jeremybh1
author_rank: Contributor
timestamp: August 07, 2024, 05:43:52 am
content: Hi everyone.Late 2022 I boughthttps://www.vevor.com.au/ultrasonic-cleaner-c_11064/vevor-digital-ultrasonic-cleaner-30l-jewelry-cleaning-machine-w-heater-time-p_010203073236the "Vevor 30L Ultrasonic Cleaning Machine" to support my hobby repair business. I typically deal with vintage computer motherboards with leaked electrolyte and have used the machine to good success, I'd estimate 20 mins use every 3 months.Last week I turned it on to deep clean a power supply, came back approx 6 mins later only to find the room filled with smoke. I turned off the power (front LEDs were still on) and ran downstairs to get a mask and fire extinguisher. I was able to open up ventilation and figured no flame so take a video quickly for warranty, again back downstairs to grab phone as follows:https://youtube.com/shorts/9IrnURjq_7UI assumed a major short had occoured with ?caps exploding but no fuse blown. It go so hot that the outside metal chassis discoloured and sticker melted. Anyway got it outside, had a shower later etc.Wrote to Vevor immediately, whom are polite but explain it's out of warranty and are arranging a modest compensation. It's been 10 days and they don't want it back nor has the partial refund come through so I figured let's open it.During my inspection, I discovered:https://youtu.be/jJbZYxYkpgI?si=6pwDqwgs-5alcAKoThe fan never engaged since ownership. I didn't even know there was a fan in the unit!The thermocouple probe was disconnected from the factory (!).These defects could have potentially led to a fire or explosion of the oil.The power supply modules appear intact, with no signs of blown capacitors or heat stress on mosfets etc. However, it seems that one of the ultrasonic transducers has malfunctioned, causing a significant oil leak somehow.I am wondering if I could desolder the one that looks to have spilled it's guts and still run the unit. Your thoughts?It would be unacceptable to me to throw this huge thing into a skip.

author: floobydust
author_rank: Super Contributor
timestamp: August 14, 2024, 08:28:17 pm
content: Many Vevor products, including ultrasonic cleaning machines are subject to several product safety recalls.A Letter to VEVOR UK Customers, Recall StatementBanned in the UK. "Corrective action: Import rejected at the border and destroyed."https://www.gov.uk/product-safety-alerts-reports-recalls/product-safety-report-vevor-ultrasonic-cleaners-sold-via-ebayhttps://www.electricalsafetyfirst.org.uk/product-recalls/brands/vevor/https://www.ccpc.ie/consumers/product_recalls/product-safety-information-notice-on-vevor-ultrasonic-cleaners-th-60a-and-th-30a-sold-on-the-ebay-platform/I think it's the grounding and fusing, wiring too for the current handling.

author: thm_w
author_rank: Super Contributor
timestamp: August 14, 2024, 10:16:53 pm
content: You are sure the thermal probe didn't just pop out when you opened the case right?You'd think it would not heat up if it detects and open probe, as would 99% of products. Or at least the display would show 99 or 00 or something.What oil?

author: melanie1805
author_rank: Newbie
timestamp: October 08, 2024, 07:37:22 am
content: It sounds like a serious safety issue caused by manufacturing defects, especially with the fan and thermocouple. If one transducer is damaged, you *might* be able to remove it and still use the unit, but this could impact performance or cause more problems. I’d recommend extreme caution if you decide to repair it yourself, as safety should be the priority. If Vevor won’t replace it,consider consulting a professional to ensure it’s safe to operate.

author: pienari
author_rank: Regular Contributor
timestamp: October 09, 2024, 10:36:54 am
content: Hi.Have get it back to work?.Check the transistors.I bought cheap ultrasound board from china to my old cleaner and both failed after few hrs use.I found that transistors get very very hor and short.So i removed old small heatsinks and installed both transistors to main aluminium frame.Now it still works after 2 years of use without overheat.