Abstract: A compact, portable, lightweight, low power consuming, convenient, versatile and sterile laminar airflow device, useful in obtaining a workspace substantially devoid of airborne particulate contaminants, said device having a body (C) divided into an upper and lower chambers; the upper chamber housing one or more pre-filtration members (B), a motor (T) driving a fan (S), and one or more filters (U) located below the motor; and the lower chamber provided with a slideable front panel (M), a removable platform (X) located at the lower portion of the chamber and a perforated plane (N) placed on the removable platform.

Abstract: A refrigerated showcase has a front opening through which a consumer can view and access foodstuffs on display. The foodstuffs are cooled by coolant air introduced through a slanted, perforated, interior panel located near a rear wall of the showcase. An air curtain directed downwardly at the front opening minimizes coolant air loss through the opening. Lips are applied and extended from the edges of vertical sides of the access opening to reduce the loss of coolant air through the air curtain. Thus, relative flows of coolant air and the air curtain are maintained inside the showcase.

Abstract: A refrigeration system comprises a display case having a bottom, a top, a first side, a second side, and a viewing area, all of which define a display space. A refrigeration coil cools the display case. At least one fan is adjacent the coil and propels cool air through the display space. A vertical channel communicates with the fan and orifices along the channel distribute air horizontally across the display space. At least one surface extends across the display space and directs air along a different horizontal path.

Abstract: A refrigerated display case having a substantially wedge shape for displaying items at temperature below the surrounding ambient temperature. The display case includes a cold air discharge having a length and a warm air return having a length substantially greater than the cold air discharge. The cold air discharge includes a diffuser having a plurality of flow directing structures disposed at an angle relative to the direction of airflow to direct the flow air over the entire display case such cold air flows over the entire area of the display case to uniformly cool the entire product display area.

Abstract: Air circulation system for a refrigerated display case and a method for ventilating a space including a refrigerated display case. The refrigerated display case includes a space inside a frame of the display case, shelves in the space and an inside air circulation system for circulating air from the bottom portion of the display case to the top portion of the display case. Warm air is supplied by a blower arranged in connection with the refrigerated display case and blown to the front side of the refrigerated display case in the vicinity of the floor on which the refrigerated display case is situated.

Abstract: A display freezer including a display case defining an interior space; an evaporator cover assembly located in the interior space and separating the interior space into a display portion and an evaporator portion, a fan plenum having therein an inlet communicating with the display portion of the interior space and an outlet spaced from the inlet and communicating between the evaporator portion and the display portion of the interior space; a fan operable to create a flow of air through the inlet and the outlet; a first baffle located adjacent the inlet and a second baffle and defining a serpentine path extending from the inlet for conducting the flow of air in the evaporator portion and an evaporator coil assembly located in the evaporator portion between the inlet and the outlet.

Abstract: Air circulation system for a refrigerated display case and a method for ventilating a space including a refrigerated display case. The refrigerated display case includes a space inside a frame of the display case, shelves in the space and an inside air circulation system for circulating air from the bottom portion of the display case to the top portion of the display case. Warm air is supplied by a blower arranged in connection with the refrigerated display case and blown to the front side of the refrigerated display case in the vicinity of the floor on which the refrigerated display case is situated.

Abstract: A cover for a cooling unit, such as an evaporator assembly, of a display refrigerator. The cover is advantageously made of a single piece of material, preferably an injection molded, filled polypropylene plastic, which is capable of withstanding the harsh conditions found in a display refrigerator. The cover is further advantageously configured to enhance the operation of the evaporator assembly, protect the evaporator assembly, insulate the frozen or refrigerated food and drink items from the heat generated by the evaporator assembly, and decrease the time needed to install the cover into or remove the cover from the display refrigerator.

Abstract: The invention provides a method and device for detecting the state of an air filter in a ventilation system of the passenger compartment of an automobile vehicle. The installation is put into operation in a given mode and a parameter of an air flow emitted into the passenger compartment by an air nozzle of the installation is measured by means of a measurement device filled with a collector. The measured value of the parameter is then compared with a reference value, to determine whether or not the filter needs to be replaced.

Abstract: A refrigerator having dual air velocity generating apparatus for air curtain flow comprises a cool air supply duct through which cool air is supplied to an upper opening of a food storage chamber by operation of a fan, and a dual air velocity generating apparatus provided at an exit of the cool air supply duct for transforming the air curtain flow discharged through the exit with the dual air velocity, thereby decreasing the velocity of the air curtain flow distal to the food storage chamber than that proximal to the food storage chamber.

Abstract: A refrigerator has a cool air duct having ports opened at areas adjacent to openings of a freezing compartment and a fresh food compartment respectively, a blowing fan for discharging air in the cool air duct so that air curtains for shutting off the openings of the freezing compartment and the fresh food compartment are generated, and a device for opening/closing the ports. When doors are opened, the opening/closing device opens the corresponding ports to the opened doors. Thus, the air curtains are formed both at the freezing compartment and the fresh food compartment.

Abstract: A refrigerator has a device for generating an air curtain for shutting off an opening of a cooling compartment, and plates are disposed at a cool air discharge port of the air curtain generating device. The plates control the discharging direction of the cool air according to the opening and closing of a door. When the door is opened, the air curtain for preventing the leakage of cool air is generated by the plates. When the door is closed, the cool air is supplied at the area adjacent to the door and the inner spaces of the pockets formed at the door. Thus the foodstuffs in the cooling compartment are rapidly and uniformly cooled.

Abstract: A housing for an entertainment system is provided including a housing having a top face, a bottom face, a front face, a rear face, and a pair of side faces defining an interior space. The front face has a cut out formed therein with a recess formed about a top edge and pair of side edges thereof. The housing further includes an inner door hingably coupled along a side edge thereof a first predetermined distance from the recess of the front face within the interior space and further adapted to open outwardly thereby allowing selective access to the interior space. The housing further includes a pair of outer doors hingably coupled at outer side edges thereof to each side edge of the recess of the front face. As such, the outer doors are adapted to swing outwardly between an open orientation and a closed orientation with the outer doors residing within the recess and an intermediate space defined between the inner door and outer doors.

Abstract: A low temperature food merchandiser having a cabinet with an open front product area, a primary cold air system for maintaining substantially constant frozen food temperatures of 0.degree. F. or ice cream product temperatures of -5.degree. F. in the product area including the formation of a series of vertical curtains of primary low temperature air extending across the open front of discrete product area sections, a secondary air system protecting the primary air curtains, and the primary system also including primary evaporator means constructed and arranged to operate at elevated coil temperatures in the range of -5.degree. F. to -8.degree. F. to maintain 0.degree. F. product temperature or coil temperatures of -12.degree. F. to -15.degree. F. to maintain -5.degree. F. product temperatures, and including high efficiency reverse air cycle defrost means for periodically defrosting the primary cooling means.

Abstract: A building houses a semiconductor manufacturing facility, which is circular in shape and is of a multi-story structure. A silo is located at the center for use in storing and transferring wafers to clean rooms disposed radially around the silo at each floor. Human access is not permitted in the silo and in the clean rooms in order to prevent contamination of the wafers. Due to the modularity of the clean room structures, clean rooms can be reconfigured easily without significant impact on the on-going manufacturing operation. The modularity also permits portions of the facility to be deactivated when not needed.

Abstract: The locker comprises a back wall, a top wall, a bottom wall, a front wall and two side walls to form a chamber. The front wall is provided with a door by which a user can have access to the chamber. The front wall forms with the side walls two lateral vertical edges that are respectively provided with two wire meshes along at least a portion of their length whereby air circulation inside the chamber can be provided by means of the two wire meshes.

Abstract: A refrigerated food preparation table having an evaporator cooling coil and heat transfer fins which are baffled to create two air flows which are cooled to different temperatures. One air flow passes through a laminar air screen and across an open top of a food container, and the other f low passes along the outer surfaces of the food container, thereby cooling the food container and a volume defined therein. This configuration preferably cools the entire volume within the food container to a temperature below 40' F., yet remaining above 32' F. The laminar air screen may be disassembled and separated for the purpose of cleaning.

Abstract: An air treatment plant comprises a housing (1); a conveyor (4) adapted to feed food to be processed through an inlet opening (2) in the housing, to and through an air treatment area, and to feed the processed food from this area to and through an outlet opening (3) in the housing; a heat exchanger; and a circulation fan for generating a circulating air flow through the heat exchanger, the air treatment area, and the circulation fan in succession. A pressure regulating fan (25) is connected to a chamber (33) adjacent to one of the inlet and outlet openings (2, 3) for generating a pressure difference across that opening substantially equal to that across the other opening, thus minimizing the air exchange between the interior and the exterior of the housing (1). The conveyor (4) inwardly of this one opening passes a tunnel with at least two air curtain ducts which are directed substantially transversely of the conveyor path and through which some of the circulating air flows.

Abstract: An air conditioning unit comprises a housing (1) which consists of a bottom (2), a roof (3), two side walls (4, 4'), a rear wall (5), and a front wall (6) having an opening (8) which is closeable by means of at least one door (7, 7') and which permits access to the interior of the housing; means for introducing supply air into the housing; and means for evacuating exhaust air therefrom. Two vertical air ducts (13, 13') provided adjacent to the front wall (6) have a large number of small holes (14) through which supply air can be introduced into the housing in the form of partial currents which are directed away from the front wall (6) towards the rear wall (5), both when the door (7, 7') is closed and when it is open.

Abstract: An apparatus and method for providing a selected atmosphere at and within an opening to the interior volume of a furnace. Two or more paralleled diffusers adjacent to the furnace opening laminarly emit different fluids and provide a multi-layer fluid curtain over the opening. The curtain has a composite modified Froude number from 0.05 to 10, and a thickness at emission of at least 5% of its extent in the flow direction. Partially covering the outside of the curtain is an optional, substantially flat, outer shield with an aperture coinciding with the furnace opening, which reduces the necessary flow rates of fluids. Optional side shields around the sides of the curtain also reduce the necessary fluid flow.A preferred diffuser comprises a porous tube in a housing with an outlet directed to emit fluid across the furnace opening. The outlet is covered with a screen to disperse the fluid flow and to protect the porous tube.

Abstract: An apparatus for producing an air curtain comprising a central opening bounded by a frame on the top, bottom, and sides which defines internal channels which fluidly communicate with one another. The bottom and sides of the frame define apertures of varying diameter proximate to the lower portion of the central opening. The apertures are arranged in an array whereby rows of apertures more closely proximate to the front edge of the central opening have diameters greater than the diameters of the apertures in rows more closely proximate to the rear edge of the central opening. Air is drawn into the channels through the apertures, and the array of apertures produces a forwardly biased pressure gradient, the result of which is to cause a stream of air being expelled downwardly from the top of the central opening to ramp or curl forwardly toward the front edge of the central opening as that stream of air traverses the central opening.