초록 ▼

A cooling system of compact design includes redundancy and free cold source usage. The system includes two circuits for circulating coolant and heat absorbing medium, and two heat exchanges common to the circuits. The heat exchangers are combined to act on both of the circuits, so that inside air is

A cooling system of compact design includes redundancy and free cold source usage. The system includes two circuits for circulating coolant and heat absorbing medium, and two heat exchanges common to the circuits. The heat exchangers are combined to act on both of the circuits, so that inside air is cooled by cold liquid or by expanding coolant in a combined evaporator-air cooler, and the outside air is used to cool warmed liquid or condensed coolant in a combined condenser-liquid cooler. Free cold, that is, outside cold air, may be utilized when the difference in temperature between inside air and outside air is sufficiently great and the outside air is sufficiently cold. Liquid cooled by outside air in the combined condenser-liquid cooler and then heated by warm inside air in the combined evaporator-air cooler can satisfy the entire heat load. In other cases, the compressor system can provide cooling. The free-cooling system can serve as a redundant system for the compressor system.

대표청구항 ▼

[ I claim:] [1.] A cooling system for cooling an indoor space comprising:a first heat exchanger located outside an indoor space including a combined condenser for a coolant and cooler for a heat absorbing medium, wherein the first heat exchanger emits heat to the ambient air;a second heat exchanger

[ I claim:] [1.] A cooling system for cooling an indoor space comprising:a first heat exchanger located outside an indoor space including a combined condenser for a coolant and cooler for a heat absorbing medium, wherein the first heat exchanger emits heat to the ambient air;a second heat exchanger located within the indoor space including a combined evaporator for the coolant and cooler for the heat absorbing medium, wherein the coolant and heat absorbing medium extract heat from air in the indoor space;a first circuit to circulate the coolant connected to the condenser of the first heat exchanger and the evaporator of the second heat exchanger;a compressor connected in the first circuit to compress the coolant flowing from the second heat exchanger to the first heat exchanger;an expansion valve connected in the first circuit to expand cooled coolant flowing from the first heat exchanger to the second heat exchanger;a second circuit to circulate the heat absorbing medium connected to the cooler of the first heat exchanger and the cooler of the second heat exchanger;a pump connected in the second circuit to circulate the heat absorbing medium between the first heat exchanger and the second heat exchanger;temperature sensors positioned for measuring temperature in the indoor space and outside the indoor space; anda control unit connected for monitoring said temperature sensors and controlling the compressor and the pump, wherein responsive to received temperature signals the control unit activates at least one of the compressor and the the pump to cool the indoor space.