Reservoir for carbon dioxide refrigerating fluids

The invention discloses a reservoir for carbon dioxide refrigerating fluids. The reservoir comprises a barrel, an upper end cover and a lower end cover. Support legs are arranged on the outer side face of the barrel evenly. A cavity is formed in the barrel. A heat-insulating layer is arranged on the inner wall of the barrel. A flow guide pressure booster is arranged in the cavity, and comprises an upper positioning ring, a lower positioning ring and flow guide plates. The upper positioning ring is connected to an auxiliary rod rotationally. The auxiliary rod is fixedly connected to the top of the upper end cover. The lower positioning ring is connected to the upper positioning ring through the flow guide plates. The flow guide plates are in head-to-tail connection from top to bottom sequentially. A backflushing device is arranged on the lower end cover. The reservoir has the advantages that the reservoir is simple in structure and high in practicability, pressure boosting delivery can be achieved under the ac