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@ -273,7 +273,7 @@ Buy DS18B20s chips. Cheap or not cheap doesn't matter - I've never seen "bad" DS
<img src="./m_ds18b20_epoxy.jpg" width="500"><br><br> <img src="./m_ds18b20_epoxy.jpg" width="500"><br><br>
For sensors at compressor and discharge (+100°C and higher) use heat resistant sleeves at every wire.<br> For sensors at compressor and discharge (+100°C and higher) use heat resistant sleeves at every wire.<br>
<img src="./m_ds18b20_wires_protection.jpg" width="500"><br><br> <img src="./m_ds18b20_wires_protection.jpg" width="500"><br><br>
To get precise temperature readings sensors must be insulated from ambient air temperature influence with additional thermal insulation. Temperature readings from most of sensors are interesting, but +/- few degree does not matter. So most of sensors can be covered with insulation as you wish. But 2 sensors "Before evaporator" and "After evaporator" are critical to EEV and needs extra attention. Temperature of this sensors must be as close to the temperature of copper tube as it possible. So install Tae and Tbe sensors as pictured below. You can use thermal paste, but there is no significant difference with much more available silicone.<br> To get precise temperature readings sensors must be insulated from ambient air temperature influence with additional thermal insulation. Temperature readings from most of sensors are interesting, but +/- few degree does not matter. So most of sensors can be covered with insulation as you wish. But 2 sensors "Before evaporator" and "After evaporator" are critical to EEV and needs extra attention. Temperature of this sensors must be as close to the temperature of copper tube as it possible. So install Tae and Tbe sensors as pictured below. You can use thermal paste, but there is no significant difference with much more available silicone. Tape isn't shown below, for clarity, but must be used on every insulation layer.<br>
<img src="./m_ds18b20_evaporator_mount.jpg" height="700"><br><br> <img src="./m_ds18b20_evaporator_mount.jpg" height="700"><br><br>
About water(glycol)<->refrigerant heat exchangers. You can use plate heat exchangers. Pros: best efficiency. Cons: costs money.<br> About water(glycol)<->refrigerant heat exchangers. You can use plate heat exchangers. Pros: best efficiency. Cons: costs money.<br>
<img src="./m_plate_heat_exchangers.jpg" width="500"><br><br> <img src="./m_plate_heat_exchangers.jpg" width="500"><br><br>