Refrigeration main unit and heat preservation water tank are arranged on the first floor of the trolley, the size can be customized freely according to the existing space of the shield machine, and the relative position of the main machine, water pump and water tank can be flexibly modulated; the air cooler is placed on the second floor of the trolley and is connected in series with the air duct The size can be the same as the existing air duct of the trolley, and the air cooler can be placed by installing the air duct, which is completely not restricted by the narrow space on the second floor.

Refrigeration main unit cooling uses the original external circulating water of the trolley, and is divided into three links for the cooling water from the shield machine inlet pipe to the plate heat exchanger. The water consumption is small, the allowable inlet water temperature is high, and the original external water circulation of the shield construction increases The power of the water pump can meet the water demand of the refrigerator without adjustment, without additional cooling water circuit.