Abstract: A refrigerated display cabinet of vertical or semi-vertical type has a containment structure defining a display compartment and an access opening, a main air inlet mouth and a main air outlet mouth being in communication with the display compartment. A channel connects the main air inlet and outlet mouths to direct a refrigerated air flow towards the main air inlet mouth in the form of an air curtain. The display compartment is divided into an upper area having one or more shelves and a lower area adapted to be loaded with products. One shelf separating the lower and upper areas is a blowing shelf having an internal conduit directing the refrigerated air flow in the display compartment through a secondary air-emitting mouth, a first deflector intercepting the refrigerated air flow which forms the air curtain and a second deflector intercepting the refrigerated air flow emitted by the blowing shelf.

Abstract: A vapour compression refrigeration system has a main refrigerant circuit having a main gas cooler or condenser arranged in a high pressure branch, a first main evaporator arranged in a first low pressure branch, a main compressor fluidically connecting the first low pressure branch to the high pressure branch, and an expansion device connecting the high pressure branch to an intermediate pressure branch. The system has a by-pass branch connecting the high-pressure branch to the intermediate pressure branch and provided with a by-pass valve, a secondary refrigerant circuit having a secondary gas cooler or condenser arranged in a secondary high pressure branch, a secondary evaporator arranged in a secondary low pressure branch, and a secondary expansion device connecting the secondary high pressure branch to the secondary low pressure branch. A rotary pressure exchanger is fluidically connected to the by-pass branch downstream of the by-pass valve and the secondary refrigerant circuit.

Abstract: A vapor compression refrigeration system has a main refrigerant circuit having a primary compressor group, a gas cooler or condenser, an expansion device, a liquid receiver, and at least one evaporator. An emergency circulation duct fluidically connects the liquid receiver to the main circuit to allow a flow of refrigerant from the liquid receiver to the gas cooler. An emergency compressor group in the emergency circulation duct is activatable when pressure inside the liquid receiver or in the duct upstream of the emergency compressor group meets or exceeds a predefined emergency pressure threshold. An uninterruptible power supply powers the emergency compressor group and expansion device during a shutdown of the refrigeration system. When pressure inside the liquid receiver or in the duct upstream of the emergency compressor group equals or exceeds the predefined emergency pressure threshold, an emergency circulation of refrigerant fluid is activated through the emergency circulation duct.

Abstract: A refrigeration plant with multiple evaporation levels, operating according to a vapour compression cycle and including a circuit having a high-pressure branch HP, wherein is arranged at least one heat exchanger, and two or more low-pressure branches, each of which operates at a different evaporation level to serve users having different refrigeration requirements. In each of the low-pressure branches the plant comprises an expansion device, at least one evaporator and a compressor group. At least one evaporator of each low-pressure branch is connected directly to the high-pressure branch. At least a first low-pressure branch comprises a liquid separator fluidically connected: to the evaporator outlet to collect the liquid exiting the evaporator when operating in overfeeding conditions; and to the intake of the compressor group. Such liquid separator is fluidically connected to a second low-pressure branch upstream of the expansion device of such second low-pressure branch through a first connection duct.