(2) Danfoss ML032S (welding) is selected as the filter.
(3) Oil is definitely not needed. Forced air cooling of 0.5㎡ condenser. Three giant SJ 175 1 axial fans can be used as fans, and the evaporator is 0.5m2 Three giant SJ 175 1 axial fans can also be used as fans. Refrigerant R 134a is filled with about 120g according to the pipeline length, compressor starting capacitor 5uf, power supply 1-220V/50Hz, charging power of about 150w, and starting current of 3.3A.
(1.) The compressor is probably around 400 yuan, but this compressor is not easy to buy. You can ask Denuo in Zhuhai, or zero in Foshan. The working current is about1a. I don't use Danfoss DML032S, but the price of refrigerator filter is 2 yuan. It's easy to buy in the freezer. Hehe, it's cheaper. 50 yuan to buy a fan of similar model, but the condenser and evaporator are generally not so small on the market, and may need to be customized. Because our company is a heat exchanger, it is more convenient. According to the material cost, the two heat exchangers shall not exceed 150 yuan.
(2) The common compressor in the market is the refrigerator compressor, which belongs to the low back pressure compressor and is easy to be damaged when used under air conditioning conditions. If it's just an experiment, you don't want to use it often. And its nominal 200W refers not to refrigeration capacity, but to electric power. This kind of compressor has large refrigeration capacity and is easy to overload under air conditioning conditions. If you want to buy this kind of compressor, please choose the displacement, preferably not more than 2 ml/r.