Air conditioning and refrigeration apparatus utilizing a cryogen

A refrigeration system associated with a conditioned space to be controlled to a predetermined set point temperature via heating and cooling cycles, with the refrigeration system including heating means and cryogenic cooling means, the improvement comprising:

• a fluid flow path,
• a predetermined fluid in said fluid flow path,
• means for circulating said fluid in said fluid flow path,
• first, second and third heat exchanger means in said fluid flow path,
• said first heat exchanger means being disposed to condition the conditioned space,
• said second heat exchanger means being in heat exchange relation with the cryogenic cooling means,
• said third heat exchanger means being in heat exchange relation with the heating means,
• means configuring the fluid flow path to interconnect the first and second heat exchanger means when the conditioned space requires a cooling cycle,
• and means configuring the fluid flow path to interconnect the first and third heat exchanger means when the conditioned space requires a heating cycle.