Heat exchange oil filtering device and heat exchange unit

The heat exchange oil filtering device comprises a filtering chamber and a heat exchanger which are connected in series, the top of the filtering chamber is provided with a refrigerant inlet used for introducing a refrigerant, the middle of the filtering chamber is provided with a refrigerant outlet, and the bottom of the filtering chamber is provided with a first oil filtering outlet; the heat exchanger comprises a shell and a plurality of heat exchange pipes arranged in the shell, the refrigerant outlet is communicated with inlets of the heat exchange pipes, the first oil filtering outlet is communicated with an inner cavity of the shell, and a second oil filtering outlet and a gas outlet are formed in the outer portion of the shell. And the inner diameter of the filter chamber is 3-4 times of the inner diameter of the input pipeline connected with the filter chamber. The oil filter is additionally arranged in front of the heat exchanger, the inner diameter of a refrigerant filter chamber is increased, the