| 摘要 |
The invention concerns a machine for making espresso ice-cream, of the type comprising a pressurized gas refrigerating circuit composed of a compressor, a condenser, one or more lamination valves as well as heat-exchanger coils in thermal exchange relationship with the mixture storage vat and the mixing and whipping cylinder and characterized in that the refrigerating circuit further comprises an evaporator as well as a system of valves and tubes to interconnect, alternatively and selectively, the components of the circuit, the evaporator and the coils in one of the following sequences: (a) compressor, coils, condenser, lamination valve(s), evaporator, compressor; (b) compressor, condenser, lamination valve(s), coils, evaporator, compressor, respectively for heating and cooling the contents of the mixture storage vat and the mixing and whipping cylinder.
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