A closed gas circulation system may include a sealed plenum, circulation fans, and a fan filter unit (FFU) inlet to contain, filter, condition, and re-circulate a gas through a chamber of an interface tool. The gas provided to the chamber is maintained in a conditioned environment in the closed gas circulation system as opposed to introducing external air into the chamber through the FFU inlet. This enables precise control over the relative humidity and oxygen concentration of the gas used in the chamber, which reduces the oxidation of semiconductor wafers that are transferred through the chamber. The closed gas circulation system may also include an air-flow rectifier, a return vent, and one or more vacuum pumps to form a downflow of collimated gas in the chamber and to automatically control the feed-forward pressure and flow of gas through the chamber and the sealed plenum.

An air curtain air cleaner and sanitation system that incorporates established active bipolar ionization technology with threshold air delivery air curtains that provide conditioned airflow to form a lamination airflow barrier typically between openings in a structure.

The present invention relates to an air shower gate and, more specifically, to an air shower gate installed at an indoor/outdoor entrance/exit so as to remove microdust, hazardous materials, and odor from people entering/exiting same, and configured to monitor the quality of indoor/outdoor air such that, through air purification or ventilation, a comfortable and clean indoor environment can be maintained and managed. An air shower gate according to the present invention has the following advantages: Dust and the like gathered on clothes during outdoor activities can be removed, and indoor and outdoor spaces are separated by an air curtain, thereby enabling the user to move in/out conveniently without having to open/close a door. Inflow of dust into the indoor space is prevented by the air curtain, and indoor air is filtered to perform an air purifying function.

The present invention relates to refrigerated trucks, more particularly to a refrigerated truck with side doors, including a refrigerated compartment, a chiller, a partition plate, glass plates, top plates, rotating shafts, side doors, support plates, air curtains, floors, base plates, slots, recessed handles, rails, moveable windows, moving handles and grooves. In the refrigerated truck with side doors of the present invention, doors are arranged on both sides of the refrigerated compartment, and the air curtains are used, which effectively reduces the amount of cold air loss and hot air intrusion, thereby reducing energy consumption of the chiller. Moreover, the support plates are configured to play an auxiliary role in both bearing load and keeping the balance. The present invention makes a contribution to energy saving of the refrigerated truck.

An active airflow inhibiting apparatus for an entranceway comprises a structure, an airflow sensor, and a controller. The structure comprises one or more air mover devices configured to be positioned adjacent an entranceway of a building and defining a passage therethrough for accessing the entranceway. The airflow sensor is configured to provide an output indicative of speed and direction of airflow through the entranceway or at the air mover devices. The controller is connected to the air mover devices and the airflow sensor. The controller is configured to receive the output of the airflow sensor and to control an output of the air mover devices based on the received output so as to generate a differential pressure across the air mover devices which inhibits airflow through the entranceway.

A booth including an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.

A closed gas circulation system may include a sealed plenum, circulation fans, and a fan filter unit (FFU) inlet to contain, filter, condition, and re-circulate a gas through a chamber of an interface tool. The gas provided to the chamber is maintained in a conditioned environment in the closed gas circulation system as opposed to introducing external air into the chamber through the FFU inlet. This enables precise control over the relative humidity and oxygen concentration of the gas used in the chamber, which reduces the oxidation of semiconductor wafers that are transferred through the chamber. The closed gas circulation system may also include an air-flow rectifier, a return vent, and one or more vacuum pumps to form a downflow of collimated gas in the chamber and to automatically control the feed-forward pressure and flow of gas through the chamber and the sealed plenum.

Systems and methods for limiting infiltration of cabin air into the flight deck of an aircraft, where the systems include at least one upper nozzle disposed adjacent to and above an outer upper edge of a flight deck doorway and directed downwardly, and at least one lower nozzle disposed adjacent to and below an outer lower edge of the flight deck doorway and directed upwardly; a conduit system to deliver air from a flight deck air supply to the upper and lower nozzles; and an airflow controller configured to provide sufficient air flow from the flight deck air supply to the upper and lower nozzles to create directional airstreams across the gaps between the closed flight deck door and the upper and lower edges of the flight deck doorway, so that the airstreams limit infiltration of cabin air into the flight deck via the gaps.

A magnetic switch controlled circuit for an electrical appliance includes a voltage input terminal, a voltage output terminal, a magnetic switch, a relay circuitry and a turn-off delay circuitry. When the magnetic switch detects a first change in the magnetic field from an idle status, the relay circuitry is configured to output an output voltage to the voltage output terminal so as to supply power to the electrical appliance. When the magnetic switch detects a second change in the magnetic field from the first change in the magnetic field, the turn-off delay circuitry is configured to control the relay circuitry to continue outputting the output voltage to the voltage output terminal for a predetermined period of time, the relay circuitry being switched off by the turn-off delay circuitry after the predetermined period of time elapses.

A pass box delivering an article with respect to a clean room includes a blower provided in an upper portion of the pass box, a first door on the clean room side, a first handle provided on the clean room side and opening and closing the first door, a first handle receiving portion rotating with the first handle in the pass box, a first handle receiving seat engaging with the first handle receiving portion in the pass box, and a storage stand provided in a lower portion of the pass box. The storage stand has a slit allowing air from the blower to be exhausted from an inner portion of the pass box.