Pressure regulating system of hydraulic drive air conditioner of crane cab

The invention discloses a pressure regulating system of a hydraulic drive air conditioner of a crane cab. A hydraulic pump oil outlet of a host machine is divided into two paths through a proportionalvalve; one path is connected with an air conditioner motor through an electromagnetic control valve formed by a hydraulic pipeline, an overflow valve and a throttle valve, the air conditioner motor drives an air conditioner compressor to operate through a coupler, and the electromagnetic control valve is regulated and controlled through an air conditioner control unit according to acquired valuesof a pressure sensor and a temperature sensor; the other path is connected with a rotary motor through a hydraulic pipeline and a rotary buffer valve. The control valve formed by the overflow valve and the throttle valve is connected with the control unit so as to realize a pressure safety protection function on the air conditioner motor, the pressure is automatically regulated, and the air conditioner system operates sta