Thermodynamic water heating device with increased subcooling and method of increasing subcooling in thermodynamic water heating devices

Abstract

The thermodynamic water heating device, according to the invention, has increased subcooling due to the subcooling recuperative heat exchanger (5), which it includes, and which consists of two tubular circuits (5.1) and (5.2) arranged at least partially in mutual counterflow contact to allow heat exchange between them. The subcooling heat exchanger (5) is connected to the condenser (1), the expansion valve (3), the compressor (2), and the evaporator (4) of the water heating device. With this construction, a liquid state of the entire refrigerant is achieved before reaching the compressor and condenser, which increases the coefficient of performance (COP).