Abstract: A cooling system includes: a compressor; a condenser; an expansion valve; an evaporator; an internal heat exchanger having a first conduit in heat exchanging contact with a second conduit, the first conduit being part of a high pressure fluid line between the condenser and the expansion valve, the second conduit being part of a low pressure fluid line between the evaporator and the compressor; a bypass line connecting the high pressure fluid line with the low pressure fluid line and for injecting small amounts of liquid fluid from the high pressure fluid line into the low pressure fluid line; a valve arranged in the bypass line for opening and closing the bypass line; and a control device for monitoring a load point of the compressor and controlling the valve to an open position when the load point exceeds a threshold.

Abstract: A roof arrangement has two roof parts which are divided in the transverse direction of the roof, are plate-shaped, and can be removed individually. Receptacles are provided on the roof frame and therebetween. The receptacles on the roof frame limit the lowering movement of the roof parts, which are initially guided in the receptacles located therebetween. Latching devices located in the transitional area between two roof parts secure the two roof parts while aligning the vertically.