Mechanical Apparatus TRIZ Cases

A single-diversion distributor spreads two-phase refrigerant evenly across the evaporator width, cutting pressure loss and preserving cooling power.

A controller senses control voltage from line power, delays shutdown during brownouts, and prevents compressor thermal damage and restart surges.

A magnetic puck and flexible coupler let display lights be repositioned without tools while protecting low-voltage rails from scratching.

Flat-board and tubular fiberglass ionizers improve HVAC airflow and durability while reducing particulates, odors, and ozone.

Random preamble timing lets indoor and outdoor units share an RS-485 line without polling delays or data collisions as unit count grows.

A dip-tube and meandering plate layout place refrigerant inlet and outlet on one side, cutting installation space and piping cost.

Separate control of two expansion valves stabilizes intermediate pressure and superheat, improving air conditioning performance and compressor protection.

Periodic relay switching powers the outdoor unit only for status checks, cutting standby energy while protecting compressor startup conditions.

Variable-speed fans and return dampers maintain zone pressure and particulate limits while cutting clean room energy use during idle periods.

A V-shaped heat exchanger and rear crossflow fan stabilize airflow, cut vibration, and keep floor air conditioners compact.

A multi-mode free-cooling loop switches between direct liquid cooling and refrigerant heat rejection to maintain efficiency in high ambient heat.

A relay and resistor bypass false low mixed-air readings during mechanical cooling, keeping outdoor air dampers open for better economizer use.

Three shared half-bridge circuits drive multiple air-conditioner dampers, cutting circuit count, control unit size, and cost.

Water pump and cooling fan control keeps refrigerant cool after EV stops, protecting compressor seals and preserving cooling efficiency.

Occupancy-sensing LED tubes fit standard fluorescent fixtures and send control signals to HVAC and lighting systems, cutting smart-building retrofit cost.

Pre-freezing detection lets tandem compressors and fan settings adjust before evaporator coils freeze, avoiding shutdowns and preserving cooling.

Reducing airflow into the indoor condenser raises refrigerant temperature and helps recover vehicle cabin heating when target outlet air temperature is missed.

Power and ground switching lets multi-unit air conditioners match remote-controller polarity and avoid communication circuit malfunctions.

Mode-based flap swing patterns balance temperature distribution and draft comfort by changing airflow direction and timing in cooling and heating.

Temperature and humidity thresholds coordinate attic intake, exhaust, and HVAC operation to cut energy use and prevent condensation damage.

By lowering the economizer target when mechanical cooling starts, the controller keeps discharge air comfortable and prevents coil freezing.

Ambient-light sensing activates cup holder lighting only in low visibility, helping users find seatside receptacles without distraction or spills.

Air outlet temperature sensing replaces float switches to detect low water accurately, simplify cleaning, and prevent humidifier overheating.

A PCB-mounted LED and bifurcated light guide project status light onto the wall behind the HVAC controller for clearer visibility.

Real-time PID sensing tracks gas breakthrough and filter efficiency in ductless fume hoods, replacing unreliable timer alarms.

A switchable Coandă vane redirects indoor AC airflow instantly, creating irregular air patterns and contact or non-contact air delivery.

Intelligent thermostats use occupancy, weather, and thermal retention data to shift HVAC load off-peak while preserving comfort during demand-response events.

Sensors and wireless links let an HVAC thermostat track filter and UV light status remotely, improving IAQ control and maintenance visibility.

Selective conductive contact areas on coated shelf brackets power under-shelf refrigerator lights while preserving corrosion resistance.

Shared PWM states let a fan drive circuit control lower-arm switches precisely while reducing MCU timer and pin usage.

A low-softening thermoplastic binder enables injection molding of complex fireproof ventilation grilles without triggering expandable graphite.

A floating docker frame and guided portable rover improve coupling alignment for surgical waste draining and container refill.

Compression-condensation drying keeps microbicidal vapor effective while limiting humidity and corrosive liquid deposits in closed enclosures.

Sensor-based attic airflow runs only when outdoor air can dry moisture, keeping humidity low while minimizing heat loss and vent openings.

Coordinated indoor and outdoor relay switching cuts standby power while preserving reliable air conditioner startup.

A heat-sinking bridge and cooling ring cool the electronic expansion valve coil, improving temperature resistance without increasing valve size.

Combining storage and lighting in one compact entryway unit cuts clutter, saves floor space, and helps dry shoes or umbrellas with a perforated shelf.

Isolated UV ozone treatment disinfects surfaces and sterilizes air while underpressure, remote control, and evacuation reduce exposure and energy use.

Pulsating the expansion valve toggles evaporator superheat near zero to use more cooling capacity while limiting liquid refrigerant to the compressor.

Real-time location and schedule analysis lets a thermostat precondition home zones for arrival while cutting energy use during absence.

When a main HVAC controller lacks model data, the auxiliary controller restores it at startup to avoid manual entry, delays, and error codes.

Controller functions are delayed until stored charge or wait-time limits are met, reducing thermostat battery drain during wireless communication.

Pre-switch radiator temperature checks keep vehicle HVAC from oscillating between modes while preserving fast, stable cabin heating and dehumidifying.

Shared condenser-economizer walls and staged elevations cut heat loss while stabilizing low-pressure refrigerant flow and valve control.

A split touchscreen with dot-matrix options, fixed icons, and secure battery integration improves HVAC usability, assembly, and wired or wireless reliability.

A rotating primary brush contacts a secondary brush to shed collected dust, keeping the filter cleaner effective and airflow stable.

Permissible heat-load and temperature ranges guide HVAC start-stop and frequency control to save energy without room temperature swings.

Gradual tapered outflow paths suppress vortex and sludge buildup, keeping capillary distribution even in refrigeration cycles.

Dew condensation on dust sensor lenses can cause false pollution readings, so the display logic flags condensation before showing dust status.

Switching between pumped refrigerant economization and direct expansion cooling cuts data-center energy use across changing outdoor temperatures.