Compression Machines With Non-Reversible Cycle TRIZ Cases

By holding compressor frequency constant and adjusting piston stroke and fan speeds, refrigerator noise stays masked by ambient sound.

A sub-channel header links flat porous tubes across the header width, cutting header length, part count, and heat exchanger size.

A receiver gas vent and dual expansion valves stabilize refrigerant flow, protect compressor discharge temperature, and prevent liquid compression.

Matched groove pitch and area in return bends and hairpin tubes stabilize annular refrigerant flow, cut pressure loss, and improve evaporation.

Separate relay passages distribute disproportionation-prone refrigerant without merging, cutting pressure loss and sludge buildup.

Reducing circuit pressure before burner heating keeps flammable refrigerant below its ignition limit during refrigeration part replacement.

Routing refrigerant through a reheat heat exchanger at start-up adds volume, cuts pressure spikes, and avoids shutdowns in microchannel systems.

Valve-controlled refrigerant flow and a buffer tank let a multistage Brayton refrigerator track heat-load changes quickly without COP loss.

A gas-liquid separator and cooling heat exchanger subcool refrigerant to prevent two-phase flow, cut pressure loss, and sustain cooling capacity.

A flash tank, expansion valve, and compressor unload circuit keep CO2 refrigeration below the high-pressure limit and stabilize charge control.

By placing the electric component unit in fan dead space, this outdoor unit keeps four-side heat exchange and preserves maintenance access.

Angled-blade refrigerant atomization before the evaporator boosts vapor content, improves heat transfer, and helps prevent frost buildup.

Bypassing the intercooler at startup and returning trapped liquid refrigerant protects the second-stage compressor and improves cycle efficiency.

By holding refrigerant temperature constant with a subcooler, this case improves charge diagnosis accuracy despite pipe-length differences.

Opposed diaphragms replace costly clearance-gap pistons to generate balanced pressure waves for cryogenic refrigerators with lower cost and better efficiency.

Preheating the refrigerant with a heater prevents dew condensation and liquid return, protecting light source elements and compressor reliability.

By moving heat exchanger headers outside the air duct, this dryer layout frees internal space while improving heat transfer and shortening cycles.

A tailored HFO/HFC refrigerant blend cuts GWP while staying non-flammable and compatible with R-404A and R-507 refrigeration systems.

A bypassed intercooler keeps second-stage refrigerant above saturation at low heat-source temperatures, preventing wet compression and power loss.

A gas vent pipe and valve return accumulated refrigerant to the receiver when pressure loss slows flow, preserving cooling capacity.

Receiver gas venting plus upstream subcooling and downstream dryness control stabilizes R32 suction wetting and protects the compressor.

A flash tank sized to 10-30% of total system volume stores CO2 refrigerant and separates vapor and liquid in transcritical cycles.

A two-stage CO2 cycle uses integrated intercooling and a bypass circuit to raise cooling capacity while limiting space, weight, and condensation issues.

A control module uses shutdown frequency and demand signals to switch compressor capacity, cutting energy use without sacrificing comfort.

A low-pressure drainage conduit isolates bearing oil from the working medium, avoiding bulky ORC oil separators while keeping lubrication reliable.

Adjusting upper and lower refrigerant valve openings shifts flow to the lower heat exchanger, shortening defrost and preventing compressor backflow.

HFO and HCFO refrigerants dissolved in oil enable absorption cooling with lower toxicity, lower pressure demands, and reduced environmental impact.

A high-stage compressor cools the low-stage receiver during compressor shutdown to prevent supercritical pressure rise without extra refrigeration.

Upper-end inlet and outlet placement keeps liquid refrigerant from reaching the compressor while preserving a compact double-pipe heat exchanger.

Sensor correction based on refrigerant state changes enables accurate zeotropic mixture composition detection without costly high-precision sensors.

An intercooler between compression stages boosts CO2 transcritical cooling capacity and efficiency while limiting added weight and complexity.

Staggered compressor restart with a timed delay controls refrigerant flow, preventing pressure spikes and mechanical failure after shutdown.

An auxiliary heat exchanger with evaporation and superheat regions reheats dehumidified air before the indoor fan to prevent condensation.

Timed refrigerant flow shifts between two evaporators keep refrigerator and freezer compartments cooled together with steadier temperatures.

Starting the primary vapor-compression loop before the two-phase CO2 loop reduces cavitation risk and stabilizes cascade cooling startup.

A PAG and 10-25% polyol ester lubricant blend improves HFO-1234yf miscibility, reducing evaporator oil trapping in vapor compression systems.

Front-face reinforcing elements keep the cooling element flat against the evaporator, enabling stable vaccine storage temperatures without fans or heaters.

A blended HFO-1123 and HFO-1234yf working fluid cuts GWP while preserving refrigerating capacity for conventional R410A heat cycle systems.

Three parallel supercooling sections and intermediate ducts boost R1234yf condenser cooling without raising saturation pressure or enlarging the assembly.

Precomputed load and temperature correction factors let control panels estimate centrifugal chiller design COP accurately with less computation.

Two-stage compression with a medium-pressure bottle and switching valve raises temperature lift and COP in reversible heating and cooling.

Battery-backed mode switching keeps cooling during outages by pre-cooling first and lowering compressor and fan power to extend battery life.

Battery backup and pre-stored cold energy keep cooling during outages while lowering power demand and battery size.

Alternating one- and two-compressor operation keeps cabinet temperature stable while cutting start-stop frequency, power use, and wear.

A two-phase ORC fluid pairs alcohol or ketone working media with a hydrocarbon lubricant to maintain lubrication under high thermal stress.

Pressure-based valve control prevents economizer flow reversal and keeps the flash tank below critical pressure for stable phase separation.

Dynamic control gain changes expansion valve response with target superheat shifts, limiting overshoot and stabilizing evaporator-outlet temperature.

A dual-role intermediate heat exchanger switches from intercooler to evaporator to cut heat loss in cooling and preserve heating capacity.

A heat-medium relay and bypass pressure switching cut indoor refrigerant leakage risk while simplifying piping and improving startup efficiency.