Diaphragm pump or diaphragm compressor and control method

The invention relates to a diaphragm pump or a diaphragm compressor and a control method. The diaphragm pump or the diaphragm compressor comprises a working chamber, a power chamber, a diaphragm piece, a motor, an inlet, an outlet, a suction valve and a discharge valve. The flywheel is arranged on a driving path from the motor to the diaphragm piece so as to obtain driving force from the motor and provide the driving force for the diaphragm piece; the electric control valve is arranged between the discharge port and the working chamber and is connected with the discharge valve in parallel; and the controller is in communication connection with the electric control valve. According to the invention, large short-time power and/or large short-time power can be intermittently provided for a long time, and part of tasks which are difficult to complete originally can be completed. 本申请涉及一种隔膜泵或隔膜压缩机以及控制方法，其中隔膜泵或隔膜压缩机包括：工作腔室，动力腔室，隔膜片，电机，进入口，排出口，吸入阀，排出阀；还包括：飞轮，其设于电机向隔膜片的驱动路径上，以从电机获取驱动力，并向隔膜片提供驱动力；电控阀，其设置于排出口和工作腔室之间、且与排