Compression Machines With Reversible Cycle TRIZ Cases

Selectable shunt lines route controller signals to heater relay coils, simplifying PTAC wiring and matching heater banks to wall current.

Open-loop valve presetting with superheat zone feedback speeds stable heating switchover and helps maintain compressor COP in multi-room ACs.

Recovering compressor-side cold energy helps this HVAC cycle maintain winter heating reliability while cutting energy use in low-temperature conditions.

A three-heat-exchanger refrigerant layout switches between series cooling and parallel heating to cut pressure loss and improve heat exchange.

Outside-air-triggered mode switching checks refrigerant charge during low-load periods, cutting power use and avoiding comfort loss.

Refrigerant pressure feedback identifies valve type and adjusts water flow limits to balance heat exchange performance and power use.

By comparing predicted and actual expansion valve opening, this case detects small refrigerant leaks and prevents compressor operation.

A dual-outdoor-unit VRF layout switches indoor gas paths to deliver simultaneous cooling and heating without a dedicated pipe unit.

Separating the primary refrigerant from indoor spaces with a relay unit and secondary loop cuts leak risk and refrigerant charge in multi-floor buildings.

Switching outdoor heat exchangers between evaporator and condenser modes limits compressor pressure and preserves lubrication during cold starts.