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What are the benefits of using an air purifier made by a local expat in Chiang Mai?

Air Purifiers Chiang Mai Expats Local Business Health Air Quality

Mar 19, 2022

3 years ago

Garrett ***********

ORIGINAL POSTER

Hey guys, just throwing it out there. If anyone is looking for an air purifier, a fellow expat started a company in Chiang Mai a couple years ago and has been making these in Thailand. He's a member of this group, you can ask him any questions. 

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TLDR : Answer Summary

A fellow expat has started a company in Chiang Mai that manufactures air purifiers. The discussion highlights the simplicity and cost-effectiveness of the design, with users appreciating its practicality, especially during the burning season in Chiang Mai.

Jeh *****

Can easily fit an ash tray in top! I love it!

Honestly, though, perfect for burning season up there in Chiang Mai.

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Wylie *******

As a former engineer I absolutely love the simplicity of this. All the extra material and cost for a fancy housing serves absolutely no purpose. It would be nice if it came with, or at least another model that had an air quality sensor and filter life indicator since I assume all that would require is a simple sensor and software. Still a great design.

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Paul **************

the fancy housing on my air purifier prevents my cat to sharpen her nails on the filter, not sure how that would pan out with this design.

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Roberto ****************

@Paul *************

🤣

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Garrett ***********

ORIGINAL POSTER

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Paul **************

@Roberto ***************

this cat is better behaved than mine 😉

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Paul **************

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Wylie *******

@Paul *************

I perhaps misspoke when I said it serves no purpose. In a case such as pets and toddlers, if placed on the floor, it can provide protection. For a very large percentage of people it serves no purpose. I guess that's what I get for commenting in absolutes, as there are almost always exceptions to virtually everything.

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Wylie *******

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Roberto ****************

Hey

! I'm the owner and electronics engineer behind AirDeveloppa :)

The reason why they unit does not have an embedded PM2.5 sensor it's a commercial one rather than an engineering one.

The purpose of our product is to offer affordable and effective air filtration to the masses. Our product achieves this quite well by removing all extra add ons and focusing on airflow, scientific testing and low power.

Also, adding a PM2.5 sensor will put me in direct competition with other companies and make the product more expensive to manufacture which it is not desirable.

We have released a new product, the AirCheck Business which helps local businesses in Chiang Mai to get more customers by showcasing their indoor air quality through our app. Kindly check the new AirDeveloppa app on the PlayStore :)

If you wanna come to my office and check note engineering stuff I'm happy to show you around

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Roberto ****************

We have two additions in the pipeline: an UVC module and a PCB that allows the AirCleaner to receive AQI data from the AirCheck in order to automatically control the fan speed ;)

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Wylie *******

@Roberto ***************

I get that and appreciate the design. I in no way meant to take anything away from your product. It's quite impressive to have come up with such a simple but innovative product that can provide the same performance as ones 2-3 times or more expensive. Innovation does not always have to be more complex.

As I indirectly said there is a lot of sense to start with a simple bare bones and inexpensive product to start with, and perhaps add features, models, or new products such as your AirCheck Business.

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Wylie *******

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Garrett ***********

ORIGINAL POSTER

I'm sure he'll like hearing that 😂. I know he has a seperate AQ sensor, if I had to guess though I'd say putting an AQ sensor on the unit it's self might stop it from getting an acurate reading, like putting a thermostat on the AC unit. I could be wrong though.

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Micah ********

@Garrett **********

I think you'd likely just put the sensor pre-filter so it's analyzing the air going in--which should theoretically be a good indication. I'd agree that a sensor post-filter would only be useful as an indicator of filter effectiveness.

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Wylie *******

one pre filter would be good for control of the fan. One pre and post filter would be best for the filter life, or cleaning interval. Although testing could provide an algorithm to predict filter life/cleaning based on pre AQ readings and fan speed. My experience is with construction equipment engine and cabin air intake and engine, transmission and hydraulic oil filtration. A pressure sensor pre and post filter to calculate the pressure differential were often used to determine when it either needed to be cleaned or changed. The issue is air turbulence immediately pre and post filter that may provide inaccurate readings.

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Micah ********

Yeah, as I was writing it I actually thought: I've never personally seen a dual sensor, but you could get an idea of filter life/effectiveness, and even better if that sensor measures air flow, as well.

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Wylie *******

to keep it simple one sensor away from the unit could be used. This isn't like an engine where a failure to filter dust can lead to catastrophic failure. I know in automotive sensor placement can be critical, since the nature and turbulence of air/fluid flow can result in inaccurate readings.

Fan speed could be used to determine airflow, taking into account the reduced airflow as the filter restriction increases. A simple test setup could determine both fan speed control and filter life.

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Wylie *******

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Wylie *******

@Garrett **********

that definitely may be the case. With the actual unit being so simple and compact there may be no good place to put the sensor within the unit that would have an accurate reading. I'm sure the more expensive units aren't accurate either unless you have good airflow in the room and around the unit. Like a fan or ceiling fan circulating air. Although one could have the AQ unit be separate and attached via a cord so it could be placed several feet away, giving a much more accurate reading of what the AQ is in the room.

Even though I love the design, my engineering mind has a hard time not looking at ways to improve. That and cost reduction is what I got paid for. There is something to be said about starting simple and cheap and building up vs complex and expensive and then trying to take cost out though.

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Wylie *******

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