Refrigerating and air-conditioning apparatus

Abstract

A refrigerating and air-conditioning apparatus is provided, with which a cold-storage/refrigeration load and air-conditioning loads such as a cooling load and a heating load can be simultaneously processed and a stable heat source can be supplied throughout the year. In the refrigerating and air-conditioning apparatus, heating energy or cooling energy stored in the primary-side refrigerant is usable as an air-conditioning load through the indoor heat exchanger while cooling energy stored in the primary-side refrigerant is transferred to the secondary-side refrigerant circulated in the cold-storage/refrigeration refrigeration cycle through the first refrigerant-refrigerant heat exchanger so as to be usable as a cold-storage/refrigeration load.

1 . A refrigerating and air-conditioning apparatus comprising:
 an air-conditioning refrigeration cycle formed by serially connecting an air-conditioning compressor, a heat-source side heat exchanger, first expansion means, and a use-side heat exchanger, and by serially connecting the air-conditioning compressor, the heat-source side heat exchanger, second expansion means, and a primary side of a first refrigerant-refrigerant heat exchanger, the air-conditioning refrigeration cycle causing a primary-side refrigerant to be circulated therein,
 the air-conditioning compressor and the heat-source side heat exchanger being housed in a heat source unit, 
 the first expansion means and the use-side heat exchanger being housed in an indoor unit; 
   a cold-storage/refrigeration refrigeration cycle formed by serially connecting a refrigeration compressor, a secondary side of the first refrigerant-refrigerant heat exchanger, third expansion means, and a refrigeration heat exchanger, the cold-storage/refrigeration refrigeration cycle causing a secondary-side refrigerant to be circulated therein,
 the second expansion means, the first refrigerant-refrigerant heat exchanger, the refrigeration compressor and the third expansion means being housed in a cold-storage/refrigeration booster unit; and 
   at least one relay unit connected with a high-pressure side connection pipe that makes flow from the heat source unit, and a low-pressure side connection pipe that makes flow out to the heat source unit, respectively, and bridging between the air-conditioning refrigeration cycle and the cold-storage/refrigeration refrigeration cycle,   wherein heating energy or cooling energy stored in the primary-side refrigerant is usable as an air-conditioning load through the use-side heat exchanger   and cooling energy stored in the primary-side refrigerant is transferred to the secondary-side refrigerant through the first refrigerant-refrigerant heat exchanger so as to be usable as a cold-storage/refrigeration load.   
     
     
         2 - 6 . (canceled) 
     
     
         7 . The refrigerating and air-conditioning apparatus of  claim 1  further comprising:
 a hot-water supply refrigeration cycle formed by serially connecting a hot-water supply compressor, a hot-water supply refrigerant side of a heat medium-refrigerant heat exchanger, fourth expansion means, and a hot-water supply refrigerant side of a second refrigerant-refrigerant heat exchanger,
 the hot-water supply refrigeration cycle causing a hot-water supply refrigerant to be circulated therein, 
 the hot-water supply compressor, the hot-water supply refrigerant side of the heat medium-refrigerant heat exchanger, the fourth expansion means, and the hot-water supply refrigerant side of the second refrigerant-refrigerant heat exchanger being housed in a refrigeration booster unit, wherein 
 
 the relay unit bridges between the air-conditioning refrigeration cycle, and the cold-storage/refrigeration refrigeration cycle and the hot-water supply refrigeration cycle, and 
 heating energy stored in the primary-side refrigerant is transferred to the hot-water supply refrigerant through the second refrigerant-refrigerant heat exchanger so as to be usable as a hot-water load.