Compressor and method of controlling the compressor

A compressor comprising:

• a housing, in which a compression chamber is provided;
• an injection pipeline installed in the housing and configured to inject a fluid into the compression chamber;
• a solenoid valve installed on the injection pipeline in the housing and configured to allow or block off injection of the fluid through the injection pipeline;
• a first circuit configured to connect the solenoid valve to a power source of the compressor so that the solenoid valve and the compressor are able to be turned on or turned off simultaneously and when the compressor is turned off, the solenoid valve is able to simultaneously block off injection of the fluid through the injection pipeline to the compression chamber;
• a system controller configured to monitor and control an operation of the compressor;
• and
• a second circuit configured to connect the solenoid valve to the system controller so that the system controller is able to turn the solenoid valve on or off when the compressor is running;
• wherein the first circuit is activated when the solenoid valve and compressor are simultaneously turned on, and the first circuit is activated when the solenoid valve and compressor are simultaneously turned off;
• and
• wherein two electric wires of the first circuit lead into the solenoid valve and two electric wires of the second circuit lead into the solenoid valve.