Xiaomi’s ultrasonic air humidifiers have proven to be reliable and quiet, but over time even high-quality equipment requires maintenance. Xiaomi Mi Smart Antibacterial Humidifier (SCKOA45) is no exception: scale, mold or failure of the piezoelectric membrane may require a complete dismantling of the case. Owners often face a lack of visible screws, which creates the illusion of a non-collectible design, but this is only part of a thoughtful design.
The need to open the device usually occurs when standard cleaning with hydrogen peroxide or citric acid ceases to eliminate unpleasant odor or white plaque on furniture. Also, disassembly is inevitable if the humidifier begins to flow through the bottom or stops generating fog despite a serviceable water level indicator. Understanding the internal architecture of the SCKOA45 will help avoid breaking plastic latches when trying to open the device.
In this tutorial, we will take a closer look at the dismantling process, focusing on hidden fasteners and electronic components, how to safely unplug plumes, how to clean the ultrasonic membrane, and what to look for when you build them, and how to maintain the device will prolong its life and restore its original efficiency.
Workplace preparation and necessary tools
Before any home appliance dismantling work begins, it is necessary to provide a safe and well-lit space. For the Xiaomi SCKOA45 model, it is critical to have a stable surface, since the device body is made of smooth plastic and can easily slip. disconnect the device from the power grid in advance and completely drain the remaining water from the tank and base, turning it over over the sink.
The toolkit for this procedure is minimal, but specific. You do not need a powerful building hair dryer, but the presence of thin plastic blades (spoogers) or mediators is mandatory. Metal screwdrivers are best used with caution, so as not to damage glossy surfaces or internal cables.
- 🛠️ A set of Phillips screwdrivers (cross) sizes PH0 and PH1 screw-hole.
- 🪄 Plastic blades or mediators for opening latches without scratches.
- 🧤 Antistatic gloves to protect electronics from static electricity.
- 🧼 Isopropyl alcohol and soft rags for cleaning contacts and board.
It is also important to prepare the screw folding container, as they can be of different lengths and are intended for different nodes, and the loss of even one fastener can cause the body to vibrate or rattle during further use.
⚠️ Note: Before you start disassembling the humidifier, be sure to wait for the internal components to dry completely if you have just used the device.
Dismantling the bottom cover and access to the fastener
The main difficulty in disassembling Xiaomi humidifiers is that the manufacturer hides all the screws under decorative elements or rubber legs. In the SCKOA45 model, the main fastener is hidden under the bottom cover, which is also the bottom of the device. Unlike older models, there are no obvious screws around the perimeter of the base.
To access the insides, you have to flip the humidifier upside down. In the center of the bottom, you'll see a round cap or an area with technical stickers. This is where the screws hold the bottom of the case. Carefully unstick the information stickers if they close the screw caps, saving them for possible re-sticking.
Using a cross screwdriver of the appropriate size, unscrew all visible screws from the bottom. Their number can vary from 4 to 6 pieces depending on the revision of the board. After removing the fastener, do not try to sharply tear the lid off, as it can be additionally fixed with internal guides or residual moisture-protective sealant.
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If the screws don't work out, don't put too much effort -- maybe the carvings got scaled. A drop of penetrating lubricant (WD-40) on the thread 10 minutes before the work starts will make the process much easier.
When you remove the bottom cover, you will have access to the main control board and the bottom of the ultrasonic emitter, and at this point, it is important not to damage the wires that go to the water level sensors and indicators, and inspect the space for additional hidden screws that can hold the metal glass of the emitter.
Removal of the top and water tank
The top of the humidifier, which includes the water tank, is usually removed without tools, but requires the right approach. In the Xiaomi SCKOA45 model, the tank is mounted on the base and fixed by the weight of the water and guides. However, to completely disassemble, you may need to remove the decorative ring or upper cover if access to the membrane is limited.
If you want to get to the ultrasonic membrane, most of the time, you just need to remove the bottom part, as described above, but if you want to change the sensors or clean the air ducts at the top, you need to be careful. The plastic in this area is thin and can crack if you don't handle it carefully.
To remove the upper decorative ring (if present in your modification), use a plastic shoulder blade. Walk it around the perimeter of the joint, carefully snapping hidden clips. Movements should be progressive, without jerking, so as not to break the plastic teeth of the latches.
- 💧 Remove the water tank and flip it over to access the valve.
- 🔍 Inspect the silicone valve at the bottom of the tank for contaminants.
- 🧹 Rinse the tank with warm water with a mild detergent.
Notice the condition of the silicone seals, which are the ones that keep the tank tight with the base, and if the seal is deformed or has lost elasticity, the humidifier will leak even after disassembly and cleaning.
Disassembly of the main module and emitter
The centerpiece of the design is an ultrasonic emitter, which is a metal glass with a ceramic membrane on the bottom. In the SCKOA45, it is mounted on a frame and connected to a control board with high-frequency wires. To extract the emitter, you need to unscrew the screws that hold its clamping bar or body.
The ceramic membrane is extremely fragile and sensitive to mechanical damage, and any microcrack will cause the device to stop generating steam, although the indication of operation will be maintained.
⚠️ Warning: Ceramic membrane is strictly forbidden to clean with abrasives, hard brushes or high concentration acids, this will destroy the microscopic experience, and the emitter will fail.
To detach the emitter from the board, find a connector labeled NEB or PIEZO, which can be fixed with a plastic lock that needs to be bent with a thin tool, and after disconnecting the wires, you can carefully remove the metal glass from the seat.
Why are the contacts of the emitter oxidized?
When you look inside the case, look at the state of the heat-dissipating paste on the transistors of the emitter driver. If the paste has dried and turned into powder, it should be replaced with a fresh thermopaste with high thermal conductivity to prevent electronics from overheating.
Cleaning and maintenance of internal components
After successful dismantling of the main nodes, a deep cleaning stage begins. scale, which forms on the walls and membrane, is an excellent conductor for bacteria and causes a decrease in efficiency. Citric acid solution or special scale remedies are ideal for cleaning plastic parts and a metal glass.
The electronic board should be cleaned exclusively with isopropyl alcohol and a soft brush. Water or aggressive solvents can damage lacquer coatings of tracks or wash off the labeling of components. Pay special attention to the water level sensor (reeder or optical sensor), which often overgrows mucus.
The table below will help you determine the cleaning method for the different parts of the device:
| Component | Pollution | Cleaning device | Tool. |
|---|---|---|---|
| Ultrasonic membrane | Scatter, scalp. | Citric acid solution (5%) | Cotton swab (softly) |
| Plastic case | Slime, mold. | Hydrogen peroxide, soap solution | Soft sponge |
| Electronic payment | Dust, oxides | Isopropyl alcohol 99% | Antistatic hand |
| Water level sensor | Mineral plaque | Acetic acid (weak) | Toothbrush |
After chemical treatment, all parts should be thoroughly washed with distilled water and dried, and make sure that there is no moisture left in hard-to-reach areas, especially in the area of electrical contacts and inside the speakers, if any.
☑️ Cleaning checklist
Assembly of the device and checking leakage
The Xiaomi SCKOA45 humidifier is assembled in reverse disassembly, and the main rule is not to tighten the screws with excessive force, so as not to damage the plastic thread. After several cycles of heating and cooling, plastic becomes more fragile.
When you install an ultrasonic emitter, make sure that the rubber seal ring is straight in its groove without skewing. Any skew will cause water to leak directly onto the electronic circuit board, which is fatal for the device. Check the reliability of the connection of the plumes and wires.
Before the bottom cover is finally installed, a test run is recommended, pour a small amount of water into the base (bypassing the tank) and turn the device on to the network. If the indicators are on and the membrane vibrates (this can be checked by dripping a drop of water onto the membrane that is turned on but not filled with water - it must be sprayed), then the assembly was successful.
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The tightness of the tank and base connection is a critical parameter. If you notice micro-sweeping after assembly, check the position of the silicone ring and the density of the screws on the bottom cover.
The final step will be to install the decorative elements and return the device to its normal place of use, and regular maintenance, including replacement of filters (if the model provides for their use) and disinfection, will allow you to forget about the breakdown for many years.