MULTISTAGE HEAT PUMP Russian patent published in 2024 - IPC F25B30/02 F25B7/00 

FIELD: heat power engineering.

SUBSTANCE: invention relates to heat power engineering, namely to heat pumps, and can be used for heat supply of buildings and structures, when heat sources of two and more temperature levels are required at the same time or heating of heat carrier, which significantly changes its temperature during heating. Multistage heat pump comprises at least two stages with compressors and condensers connected through separators, temperature control valves. In the first stage the evaporator is connected by the steam outlet to the inlet of the compressor of the first stage. Steam outlet from the first stage compressor is connected to the inlet of the first stage condenser. Condenser of the first stage is connected to the separator of the first stage by the output of the steam-condensate mixture. Condensate outlet from the first stage separator is connected to the inlet of the thermostatic control valve of the first stage, the outlet of which is connected to the inlet of the evaporator by the steam condensate mixture. In the last stage the separator is connected by the steam outlet to the inlet of the last compressor. Steam outlet from the last compressor is connected to the inlet of the last condenser, which is connected to the inlet of the last temperature control valve, the outlet of which is connected to the inlet of the separator of the previous stage. If necessary, the heat pump is equipped with an intermediate stage. In the intermediate stage, the separator is connected by the steam outlet to the inlet of the compressor of the intermediate stage. Steam outlet from intermediate stage compressor is connected to inlet of intermediate stage condenser, which is connected to intermediate stage separator by outlet of steam condensate mixture. Condensate outlet from the intermediate stage separator is connected to the inlet of the intermediate stage thermostatic valve, the outlet of which is connected to the inlet of the separator of the previous stage in terms of steam condensate mixture.

EFFECT: increasing reliability, reducing the number of system elements and reducing the number of pipelines.

1 cl, 2 dwg