REFRIGERATION SYSTEM AND HEAT PUMP UNIT INCLUDING SUCH A SYSTEM

摘要

The invention relates to a cooling system and a heat pump unit including such a system. Said refrigeration system includes a main circuit (2) for circulating a refrigerant, comprising a condenser (4), an expansion valve (5), an evaporator (6) and a compressor (3) connected in series, a refrigerant injection circuit (7) designed to enable the refrigerant taken from the main circuit to be injected into at least one compression chamber of the compressor, a means (8, 9) for measuring the temperature and delivery pressure of the compressor, and a regulation means (11) coupled with the injection circuit and designed such as to regulate the amount of refrigerant injected into the compressor, the regulation means including a blocking means movable between open and closed positions of the injection circuit, and a control means (12) designed for controlling the movements of the blocking means between the open and closed positions thereof according to the temperatures and pressures measured by the measurement means.