AIR CONDITIONING SYSTEM, INCLUDING DEVICE CONTROLLING PRESSURE AND BYPASS VALVE Russian patent published in 2017 - IPC F24F3/00 F25B13/00 F25B49/02 

FIELD: ventilation.

SUBSTANCE: air conditioning system contains the first and the second heat exchangers at the use side, and the heat exchanger on the heat source side, respectively connected in series; a compressor, connected between the first heat exchanger on the use side and the heat exchanger on the heat source side; an expansion valve, connected between the first heat exchanger at the use side and the second heat exchanger on the use side; pressure control device, connected between the second heat exchanger on the use side and the heat exchanger on the heat source side; and the bypass valve, connected between the expansion valve and the heat exchanger at heat source side, at that, the pressure control device is designed to keep the coolant, flowing from the second heat exchanger at the use side to the heat exchanger at the source side, at a given pressure, the bypass valve is designed with capability to provide the coolant bypass from the expansion valve of the second heat exchanger at the use side and the pressure control device, and the pressure control device and the expansion valve is designed in cooperation with each other in order to keep the compressor temperature lower the maximum acceptable temperature, specified for compressor.

EFFECT: decrease of the coolant temperature, flowing into the compressor from the heat exchanger, upto the level at which the temperature of the coolant, flowing from the compressor is within the allowable value of the compressor fault withstandability and provide sufficient capability for the capacitor defrosting, even when the circuit has the control pressure device.

21 cl, 6 dwg