Abstract: A fresh air inductor device for installation with a forced-air heating appliance ensures an adequate supply of fresh air is tempered prior to introduction to the heating appliance. Air from the supply plenum of the heating appliance is applied to the device together with outside air. The supply plenum air enters the device through a venturi tube, the decreased pressure created draws in outside air, which mixes with the supply plenum air before being introduced to the return plenum of the heating appliance. Various configuration of venturi tube within the air inductor device regulate flow rate and air mixing characteristics.

Abstract: Mixing section for outdoor air and return air in an air-conditioning apparatus, the mixing section being positioned between a supply duct supplying outdoor air into a room and a return duct removing exhaust air from the room for mixing outdoor air and return air. The supply and return ducts comprise adjusting devices for adjusting the air flows. To control the air flows at different mixing ratios and to make the mixing more efficient, guides are provided after the adjusting devices of both the supply device and the return device in a mixing space so as to divide the air flows passing through the adjusting devices into a plurality of separate interlapping air jets crossing each other.

Abstract: A system for circulating ventilating air in a space includes a supply air chamber configured for communication with a supply duct, a return air chamber configured for communication with a return air duct, and an outside air chamber configured to receive outside air from an outside air intake. The outside air chamber includes an outside air damper having a plurality of settings for varying outside air flow volume in the outside air chamber. The outside air damper establishes a predetermined relationship between each outside air damper setting and the outside air flow volume. The outside air damper establishes each setting in response to a damper control signal. The system further includes a mixed air plenum in communication with the return air chamber and the outside air chamber and a fan positioned between the mixed air plenum and the supply air chamber, the fan supplying a constant volume of air to the supply air chamber in response to a fan control signal.

Abstract: An airhouse for supplying conditioned air to the interior area of an enclosed building. The airhouse incorporates one or more blowers having variable speed controllers enabling them to be operated at variable volumetric flow rates. The airhouse housing includes variable area dampers for controlling the inlet of outside or building return air. A dedicated controller is provided for adjusting the inlet areas of the two inlet pathways to provide a constant flow velocity through a direct fire burner through a range of blower volumetric output settings. In addition the units may include variable area diffuser units which tend to maintain constant discharge velocity pressure at various blower volumetric flow rate settings. In addition various control and operating strategies are provided for the individual airhouse units and a distributed array of such units in a large building structure controlled by a central computer.

Abstract: A noise reduction curb for use as an interface with a rooftop air conditioning unit by forming a base upon which the air conditioning unit rests and is mounted on a roof of a building. A noise reduction supply air duct is oriented in the longitudinal dimension of the air conditioning unit and has a supply air inlet fluidly coupled to the supply air source and a supply air outlet fluidly coupled directly to the supply ducts in the building. The supply air inlet is longitudinally displaced from the supply air outlet and is separated therefrom by a flow turbulence reducing substantially straight duct section. A noise reduction return air duct is oriented in the lateral dimension of the air conditioning unit and has a return air inlet fluidly coupled directly to the return air ducts in the building and a return air outlet fluidly coupled to the air conditioning unit. The return air inlet is laterally displaced from the return air outlet.

Abstract: A cover assembly for a roof mounted air conditioner unit which allows an increased output air volume to flow from a roof mounted air conditioner into a cooling volume; the assembly comprises a cover, return air grills, side diffuser assemblies, and a register having frame, directional control louvers, volume control louvers, a throttle and mounting screws; the register is substantially in alignment with the output blower of a roof mounted air conditioner and sized to allow a maximum output air volume to flow into the cooling volume. The register's volume control louvers and directional control louvers control the amount of air passing through the register and the direction of air flow respectively. Additionally, a method for retro-fitting existing covers with a register aligned with the output blower of a roof mounted air conditioner thereby producing the same effect of the improved cover assembly is shown.

Abstract: An air-conditioned booth for accommodating a small number of people. The air-conditioned booth includes a transparent wall structure extending from a base to a top and enclosing an interior space. The booth includes a duct system and connected air conditioner for cooling air and directing the cooled air into the interior space of the booth. A damper system is operatively connected with the duct system and is positionable to place the booth in a non-cooling mode and a cooling mode. Air cooled by the air conditioner is directed to the ambient air surrounding the booth by the damper system when the booth is in the non-cooling mode and air cooled by the air conditioner is directed into the interior space of the booth when the booth is in the cooling mode. A vending unit is operatively connected to the damper system and controls the damper system to place the booth from the non-cooling mode to the cooling mode in response to the input of currency into the vending unit.

Abstract: An automatic mechanism for opening the outlet of an air conditioner enables the outlet to be open to an extent creating a selected velocity of discharge air. The movement of the door is monitored and is terminated when the door reaches a position for establishing the selected velocity or when the door fails to reach that position within a predetermined position. A support member is provided on which are mounted a door-moving motor and air-directing vanes. The support member includes guides for guiding vertical movement of the door.

Abstract: An airhouse for supplying conditioned air to the interior of an enclosed building. Matched twin blowers symmetrically arranged within the airhouse enclosure are operated in unison to insure a balanced air flow into the airhouse and through the blowers. A burner unit mounted intermediate the blowers is flanked by matching outside air inlets having controllable dampers, preferably of a canister-type, operable in opposition. A building return air inlet located midway between the blowers likewise has canister-type dampers operable in opposition. The blowers may be independent and operated at the same speed by separate drive means, or they may be mounted on a common shaft operated by a single drive means. A controller may be provided for varying the speed of the drive means. In one embodiment dampers may be provided for the building air outlets along with dampered openings from the blower enclosures to the external atmosphere for rapidly expelling contaminated air from the building interior.

Abstract: A food storage building (10) having exterior wall surface (55) and exterior ceiling surfaces (65) held in spaced relationship with interior wall surfaces (64) and interior ceiling surfaces (64) to form interconnecting between wall and between wall cavities. Ventilation duct (41) is positioned within the between wall cavities around the base perimeter of wall systems (11). The ventilation duct (41) has a plurality of vent holes (42) for supplying heated or cooled forced air from heat source (40) to the between wall cavities for purposes of holding interior wall surfaces (54) and interior ceiling surfaces (64) above the drew point for the interior atmospheric conditions of food storage building (10).

Abstract: The invention relates to a method of establishing and maintaining in sealed tents or the like mobile units, an environment which is independent of the surroundings with regard to temperature and contamination. The invention is characterized by taking air from the surroundings, extracting contaminated particles and gas from the air by filtration, and causing the air to pass into the mobile unit so as to establish a predetermined air pressure which is higher than the air pressure of the surroundings. The filtered air is mixed with air recycled from within the mobile unit when the aforesaid predetermined air pressure has been reached and mixing of the filtered air with recycled air is continued for as long as the internal air pressure is equal to or greater than the predetermined air pressure. The air mixture is heated or cooled to a predetermined temperature and is then distributed essentially uniformly in the mobile unit and filtered, in conjunction therewith, so as to extract any remaining particles and gas.

Abstract: A two section damper assembly and method of use is disclosed for avoiding stratification of cooled air in an air conditioning system. The damper assembly is especially adapted for use in variable air volume air conditioning systems that include an economizer. During the economizer mode of operation, the building in which the air conditioning system is installed is cooled at least partially with outside air as opposed to cooling solely by mechanical means and the volume of air that is required may be relatively low. The variable two section damper assembly ensures that an adequate volume of cooling air is taken in and that there is adequate velocity of the outside air and return air to ensure mixing of the outside air with the return air in order to avoid the stratification of the supply air that can occur. The damper assembly is variable in the size of the opened area and in the direction that the individual vanes of the damper assembly are set.

Abstract: A room comprise of localized region (10) for air conditioning wherein conditioned air or totally fresh air can be directed to certain region of the room. A path of air flow may comprised of a ceiling air collector/distributor (80) joining with a floor air collector/distributor (41) by a duct (18) having the localized air conditioning region (10) link the floor air collector/distributor to the ceiling air collector/distributor to complete the circuit while maintaining the characteristic of air conditioning specific portion of the room only but not the whole room.

Abstract: Airhouses for supplying conditioned air in controlled amounts to the interior of large enclosed buildings. An improved air inlet, burner and damper construction adapted for utilization with both newly constructed and existing airhouses is provided. A burner assembly and an outside air inlet are incorporated in a unit adapted to be affixed to the airhouse. A building return air inlet provides communication between the airhouse and the interior of the building. Shear dampers or valves of equal flow capacity varying linearly between open and closed positions are provided in the outside and building return air inlets. The dampers are controllably interconnected to operate in opposition so as to admit a uniform combined volume of outside air and building return air to the airhouse. The burner assembly and outside air and building return air inlets are sized so that air entering the airhouse through the burner unit and the outside and return air inlets are at substantially equal velocities.

Abstract: A working system for an aeroplane comprising a hangar for accommodating the aeroplane, a partition wall provided within the hangar for partitioning the hangar into a fuselage work area around a fuselage of the aeroplane and a main wing work area around a main wing, and working tables arranged in the fuselage work area. The partition wall is movable between a predetermined partitioning position and a retracted position allowing entrance and exit of the aeroplane. The working tables are movable within the fuselage work area separately from the partition wall.

Abstract: A radiative-type air-conditioning unit capable of being freely moved to and set in different positions, and used to deal with the problems concerning the unevenly distributed heat loads in a closed office in which a plurality of office automation (OA) machines are installed. This radiation air-conditioner consists of a radiation endothermic/radiating plate including a radiation generating surface (21) formed on one side surface of a panel (20), a plurality of thermoelectric elements (22) attached to the other side surface of the panel (20), and a plurality of heat exchanger means (25) attached to the other surfaces of these thermoelectric elements (22). Accordingly, noise does not occur in this radiation air-conditioner, and maintenance work therefor is substantially not required. Since this radiation air-conditioner can be installed in a small space owing to its small weight and thickness and compact structure, it is used very extensively.

Abstract: A ventilation system allows for a user adjustable minimum inlet fresh air volume inflow rate, a user adjustable minimum exhaust air volume outflow rate, for an enclosed space, and provides for automatic adjustment of the air volume flow rate(s) to maintain the air pressure inside the enclosed space at a user selected level which is measured in relation to the relatively constant soil gas pressure beneath the enclosed space, or pressure under the floor of the lowest occupied level, under which floor, soil gas is present.

Abstract: An air conditioning apparatus is provided with an air conditioner embedded in a ceiling of a room provided with an air inlet port opening to the room, a heat exchanger and a blower. A duct box is connected to the air conditioner through a blow-off casing provided on the duct box to project air into the room via an air outlet opening to the room. A fan is disposed on a lower portion of the blow-off casing. A diffuser is provided for redirecting conditioning air from a vertical direction to a substantially horizontal direction. The fan is rotatable forward and backward and includes an outer rotor motor and a plurality of blades fixedly attached to an outer peripheral surface of an outer rotor of the motor.

Abstract: Improved techniques are provided for improving the environment of hazardous material abatement personnel operating within an enclosed working area while conducting, for example, asbestos removal operations. A negative pressure is established within the working area by a portable air moving unit, which exhausts air from the working area to prevent hazardous material leakage. The exhausted air is filtered, a significant portion of the exhausted air is conditioned by a portable refrigeration, heating and dehumidification system, and the temperature controlled air is returned to the working area. An air diverter is provided for regulating the ratio of the discharged air to the returned and conditioned air in response to the sensed pressure level within the working area. The temperature of the working area is regulated, thereby substantially increasing worker productivity and reducing safety risks.

Abstract: A window for reducing heat gain or loss through windows by ventilating interior air at interior temperatures over the exterior of the window in a controlled circulation pattern using nozzle tubes with a plurality of transversely disposed air jet apertures mounted in the jambs and mullions. Interior air is ventilated by a fan or compressor into air supply tubing that is attached to the nozzle tubes. Preferably, the amount of air ventilated is less than or equal to the minimum amount of ventilation required under ventilation standards.

Abstract: An air handling system (10) and associated method for supplying filtered air to an operating room (14) in a manner which reduces concentrations of airborne bacteria and other particulates. The system (10) generally includes a plenum (18) mounted at the top of a first wall portion (22) of the operating room (14). A diffuser (48) is closely received in a diffuser opening (46) through which air is communicated from the air chamber (38) of the plenum to the operating room (14). The diffuser (48) is disposed so as to depend downwardly from a point proximate the ceiling of the operating room and converge toward the first end wall (22). Further, at least one air return (60) is provided at the second and opposite wall portion (54) of the operating room (14) for removing air from the room (14) and returning the air to the clean air supply unit (12). Another but smaller portion of the air is removed through at least one air return at the base of the first wall portion of the room.

Abstract: An air conditioning apparatus comprises an automatically controlled mixing box for an air conditioning system wherein a triple inlet mixing box has a cold air inlet, a hot air inlet, a return air inlet, and a fan for inducting and disbursing the air mixed therein. Thermostatic motors regulate the first and second dampers having a configuration which controls opening or closing of the hot air inlet, the return air inlet, and the cold air inlet in such a manner that the air mixture may be regulated from cold to neutral to hot without any direct mixture of the cold air and the hot air at any time. The fan draws in the air from the open or partially open inlet openings to mix the same and discharge the mixture to the room. Several fan-powered mixing boxes may be incorporated to create a multizone system with each zone regulated by a thermostat to mix the return air with hot or cold air to supply the desired zone temperature.

Abstract: A partition type radiation local air conditioning unit is used in the field of air conditioning equipment and of office furniture. The unit is intended to make it possible to provide a better feeling of coolness by combining radiation cooling with convection cooling and to diminish the size of the air conditioning unit, which is in the form of a partition unit (1). This partition unit (1) includes a crossflow fan (4h) for blowing out breeze, an air inlet (4ha), and a breeze outlet (4hb), which are so arranged that the breeze (41) from the breeze outlet (4hb) is blown against the face of a person sitting in front of the unit. A baffle plate (9) can be provided in the air passage (7) between the crossflow fan (3) for heat-dissipating-air blowing and the radiation fins (2b) of thermoelectric elements (2a), the baffle plate (9) dividing this air passage (7) into a heat-dissipating-air passage (71) and a breeze air passage (72).

Abstract: A pair of recirculating fans for semiconductor cleanroom use are stacked to allow each fan to service a smaller zone in the cleanroom than if the fans were placed side by side. Each fan controls the temperature, humidity, and particulate count for its own zone of the cleanroom, thereby allowing strict control of these parameters. The ductwork of the two fans are cross connected so that either fan can be maintained or repaired while the other fan services its own zone and the zone normally serviced by the off-line fan.