Method for controlling the oil recirculation in an oil-injected screw-type compressor and compressor using this method

The invention relates to blowing of the screw compressor oil separator (10) and method of compressor main body (1) oil circulation. The blowing the screw compressor with the oil circulation pipeline (17). The oil circulation pipeline (17) is provided with an oil cooler (18). The oil circulation of a through a channel, namely, a bypass, which do not need crosses through the oil cooler (18). The control connected with the valve core (26) constant temperature valve (24) communicates. The valve core (29) is provided with a heat element (34) is movably. The screw compressor with the non-load recovery is provided with a load recovery, the heat element (34) is at least partially temporarily do not have a effect, thus the valve core (26) is temporarily, one side of the oil temperature multiple at least bypass the opening position; to at least a crossing through the bypass (10) to the compressor main body (1) oil circulation of the oil separator.