Refrigerating unit sharing cooling water and control method thereof

The invention discloses a refrigerating unit with an air conditioner and a shield tunneling machine sharing cooling water and a control method of the refrigerating unit. The refrigerating unit comprises a cooling tower, a heat exchanger used for cooling the shield tunneling machine is arranged between the cooling tower and the refrigerating unit, the two ends of the heat exchanger are connected with a bypass, a control valve is arranged on the bypass, and according to the control method, normal work of the shield tunneling machine is preferentially guaranteed by adjusting the opening degree of the bypass valve. Meanwhile, frequency modulation of the compressor is adjusted according to changes of the environment temperature, finally, the opening degree of the bypass valve is further adjusted according to changes of power of the refrigerating unit before and after the opening degree of the bypass valve is adjusted, and the whole refrigerating unit is adjusted to run in the optimal energy consumption state. On t