Abstract: A fan assisted heat sink cooling device is disclosed in which the heat sink assembly also forms the housing surrounding the fan. The housing is constructed of a plurality of cooling vanes which have elongated openings therebetween allowing air to pass between and cool the vanes. The vanes are angled in an approximately opposite manner to the orientation of the fan blades in order to minimize the noise generated by the cooling device when in operation. The cooling device operates in an extremely efficient manner by causing air to pass over the cooling vanes twice.

Abstract: A contoured A-coil heat exchanger is provided which enhances cooling capacity of the heat exchanger by increasing the volume rate of airflow therethrough. The two slabs of the A-coil each have discrete upper and lower sections, with the upper section of each slab having a greater number of rows of tubes than the lower section thereof, so that the lower section of each slab is narrower than the corresponding upper section. Therefore, the condensate collecting channel of a drain pan used with the heat exchanger can be made commensurately narrower because the channel need only be wide enough to accommodate the lower sections with fewer tube rows than the upper sections. The narrower channel allows the area of the drain pan central opening to be larger for a given size drain pan, thereby increasing the volume rate of airflow through the central opening and through the heat exchanger.

Abstract: A parallel plate heat sink used in conjunction with an air moving device which provides an annular flow of air against the heat sink is further provided with enhanced flow deflector means which selectively block potential exhaust paths so as to redirect the flow of air to the region under a central hub of the fan. This transforms otherwise stagnant air volume in the center of the heat sink into a primary cooling region thus lowering conduction losses and electronic component junction temperatures.

Abstract: A parallel plate heat sink used in conjunction with an air moving device which provides an annular flow of air against the heat sink is further provided with enhanced flow deflector means which selectively block potential exhaust paths so as to redirect the flow of air to the region under a central hub of the fan. This transforms otherwise stagnant air volume in the center of the heat sink into a primary cooling region thus lowering conduction losses and electronic component junction temperatures.

Abstract: In a refrigeration system in which coils are mounted in a coil passage, a fan system is provided by which air is caused to pass over the coils. The fan system includes a housing communicating with a coil passage. The housing has an inlet and an outlet each with a mouth, the mouths of the inlet and outlet being oriented substantially 180.degree. from one another. A cylindrical, elongated transverse flow fan is mounted in the housing transversely thereof and an electric motor is connected to rotate the fan. An inlet baffle extends around a part of the fan. An outlet baffle has a scoop part with a free edge extending along the length of the fan, spaced radially from the fan a short distance, and off set toward the outlet mouth. The outlet baffle, including the scoop part, defines one service of a passage to the outlet mouth. The air that passes through the housing flows through the inlet and the outlet mouths in planes substantially parallel with one another.

Abstract: An air conditioner comprises a heat exchanger for conducting refrigerant in heat exchanging relationship with an air flow, and a blower for drawing air through the heat exchanger. An adjustable flow distributing plate is disposed between the heat exchanger and blower and is movable by a motor to various positions for controlling the relative air flows through respective portions of the heat exchanger. Temperature sensors are connected to the heat exchanger for detecting the refrigerant temperature at various regions of the heat exchanger. The adjustable plate is positioned in a desired position in response to the detected refrigerant temperatures for equalizing the refrigerant temperatures in the regions of the heat exchanger.

Abstract: A compact indoor air conditioner may be produced by mounting a fan unit within the installation space of a heat exchanger inside the housing of the air conditioner. An air conditioner having such structure comprises a housing comprising a frame body, a front cover attached to the front of the frame body and having air inlets in the upper surface and in the front and an air outlet in the front lower part, a suction grille that is attached detachably to the front cover and which can be opened or closed, a heat exchanger disposed in the housing and having two cut-out portions defining an upright section, a rearward inclined section and a forward inclined section, wherein the rearward inclined section and the forward inclined section comprise the upper part of the heat exchanger and have an inverted V-shape, and a fan disposed rearward of the upright section and rearward inclined section of the heat exchanger.

Abstract: An air conditioning machine has a unit main body having an inlet port and an outlet port. The unit main body includes a cross flow fan, having a circular cross section, for introducing indoor air into the unit main body through the inlet port and blowing the air into the room. A heat exchanger is arranged on an indoor air introducing side of the cross flow fan and bent at a portion along a longitudinal direction of the heat exchanger at an acute angle. The heat exchanger has a front side heat exchanger located on a front side of the air conditioning machine and curved along the circular cross section of the cross flow fan and a rear side heat exchanger located on a rear side thereof.

Abstract: The invention relates to a separation-type air conditioner capable of increasing the heat exchanging area of a compact indoor unit and of effecting high-performance heat exchange, and particularly employable as a high-performance yet compact indoor unit whose height is low. A front heat exchanger having a configuration in which an upper edge portion and a lower edge portion are respectively made to recede is disposed in an indoor unit. In addition, a rear heat exchanger separate from the front heat exchanger is disposed on the rear surface side of the front heat exchanger. Consequently, it is possible to increase the heat exchanging area in an indoor unit having the same height, and improve the heat exchanging capacity.

Abstract: The present invention involves split system air conditioners. Specifically, the present invention provides a condenser unit with cross-flow blowers. A single cross-flow blower may be used to draw air through a heat exchanger and expel the air adjacent to a cut-off portion. Further, dual cross-flow blowers may be provided to enhance the performance of the condenser unit. The combination of air streams from two cross-flow blowers provide better air circulation through the heat exchangers and a more uniform exhaust stream. The condenser unit is more compact and can be mounted on the wall, on the overhang, or on the top of the building. These various mounting locations take advantage of the air boundary layer near the building and thus the air conditioning system operates more efficiently.

Abstract: In a refrigeration system in which coils are mounted in a coil passage, a fan system is provided by which air is caused to pass over the coils. The fan system includes a housing communicating with a coil passage. The housing has an intake and an outlet each with a mouth, the mouths of the intake and outlet being oriented substantially 180.degree. from on another. A centrifugal scroll caged blower is mounted in the housing and an electric motor is connected to rotate the blower. Baffles are provided within the housing for directing air in separate paths through the housing intake to an inlet of the blower and from the blower through the housing outlet, the flow of the air through the housing mouths lying in substantially parallel planes.

Abstract: A heat exchange apparatus comprising a heat transfer member; and at least one projecting blade which is arranged to confront the heat transfer member, and which carries out relative motion with respect to the heat transfer member; wherein a distance between the edge of the projecting at the side of the heat transfer member and a heat transfer surface of the heat transfer member is smaller than a value which corresponds to a rising point where an upward gradient of convective heat transfer coefficients rises as the distance decreases.

Abstract: The present invention involves split system air conditioners. Specifically, the present invention provides a condenser unit with cross-flow blowers. A single cross-flow blower may be used to draw air through a heat exchanger and expel the air adjacent to a cut-off portion. Further, dual cross-flow blowers may be provided to enhance the performance of the condenser unit. The combination of air streams from two cross-flow blowers provide better air circulation through the heat exchangers and a more uniform exhaust stream. The condenser unit is more compact and can be mounted on the wall, on the overhang, or on the top of the building. These various mounting locations take advantage of the air boundary layer near the building and thus the air conditioning system operates more efficiently.

Abstract: An electronic component cooling low profile fan body with favorable heat transfer characteristics is disclosed. A fan, positioned in the body, includes a number of blades circumferentially formed around a central axis. The blades establish an axial blade depth region in reference to the central axis. The low profile fan body includes a frame supporting the fan. In one embodiment of the invention, the heat transfer body includes a pressure differential surface formed around the outer perimeter of the fan blades within a first segment of the axial blade depth region. An interface surface for connection to the electronic component is positioned opposite of the fan frame. A number of heat transfer devices are disposed between the frame and the interface surface, such that the heat transfer devices are positioned within a second segment of the axial blade depth region.

Abstract: An air conditioner comprising a casing, an air flow passage extending from an air inlet at the upper side of the casing to an air outlet at the lower side of the casing. A cross flow fan is provided within the casing along with a heat exchanger composed by connecting fins through which air is allowed to pass to the outer surface of the heat transfer tube along the lengthwise direction thereof. The heat transfer tube is branched into a plurality of passes in the heat exchanger. The present invention is characterized in that the heat transfer tube is disposed in a direction crossing the axial direction of the cross flow fan. Even if drift of flowing air is caused by the cross flow fan, distribution in the air flow speed and distribution of heat exchanger can be made equal and heat exchanging capacity of high level can be obtained, without causing the trouble of condensed water from the heat exchanger falling into the air flow passage.

Abstract: The invention relates to heating and/or air conditioning apparatus for the cabin of a motor vehicle, of a kind in which two separate fans deliver air into a common housing through which the air is passed to a heat exchanger. The object of the invention is to obtain even distribution of the air delivered through the heat exchanger, despite any differences in the flow rates of air delivered by one fan as compared with the other. The apparatus includes a housing having two inlet sections which are arranged facing each other and which are connected to the two respective fans for introducing the two air streams into the housing in parallel and opposed inlet directions. These directions are parallel to a base wall of the housing, and this base wall is provided with a separating bulkhead which projects from it into the interior of the housing.

Abstract: A condenser for an air conditioning or refrigeration system having first, second, third and fourth condenser coils arranged in a modified "W" arrangement.

Abstract: A baffle between the blower and the heat exchanger of a ventilation system evenly distributes air flow over the heat exchanger surface which air flow otherwise would be concentrated along one wall of the system housing and through a localized portion of the heat exchanger. The baffle has a flat panel mounted on the wall adjacent the concentrated air flow and has spaced curved vanes extending into the air stream to direct portions of the stream away from the wall. Diffusers between and downstream of the vanes spread out air currents which pass between the vanes.

Abstract: A device for ventilating fluid radiators (5) and/or starting and braking rheostats (15) in a locomotive which is powered electrically, by means of an internal combustion engine, or by a combination thereof, said radiators and/or rheostats being disposed in a layer close to the locomotive roof (4). The device includes at least one tangential fan (8,9) having a horizontal axis which extends longitudinally relative to the locomotive and blowing air towards said radiators and/or said rheostats. The device further includes air intake openings (6,7) located in the side faces (2,3) of the locomotive.

Abstract: An air conditioning system for a working vehicle includes an air conditioning unit which is disposed within an engine room below a seat in the cabin in order to increase the usable space within the cabin. The air conditioning unit includes an evaporator, a fan, and a heater core in series. The evaporator, fan, and heater core are configured so that the air flow path between the evaporator and the fan is substantially perpendicular to the air flow path between the fan and the heater core. An inlet port is provided on the air conditioning unit at one end. An outlet port is provided on the air conditioning unit at its other end adjacent the heater core. A duct having two additional outlet ports is connected adjacent the heater core of the air conditioning unit and extends to a front part of a cabin through under a floor. This improves the heating of the lower portions of the cabin and the defrosting of the front glass of the cabin.

Abstract: A device for ventilating fluid radiators (5) and/or starting and braking rheostats (15) in a locomotive which is powered electrically, by means of an internal combustion engine, or by a combination thereof, said radiators and/or rheostats being disposed in a layer close to the locomotive roof (4). The device includes at least one tangential fan (8,9) having a horizontal axis which extends longitudinally relative to the locomotive and blowing air towards said radiators and/or said rheostats. The device further includes air intake openings (6,7) located in the side faces (2,3) of the locomotive.

Abstract: Two flat radiators are arranged in a V, with a gap at the base of the V. The ends of the radiators preferably are closed off to form a plenum chamber between the radiators. A fan, preferably of the transverse flow type, is provided at the top of the radiators to pressurize the plenum chamber, which causes air to pass out through the radiator cores. The fan also directs air from the top of the V towards the gap so that debris is directed out the gap. The radiators may have a significantly higher fin density than in the conventional radiator since debris need not pass through the radiator cores. In an alternative embodiment, four radiators are arranged in a nested double V, with a gap at the base of the outermost V. Two fans, again preferably of the transverse flow type, are provided to direct air into the top of the V. Operation is similar to the single V structure, except that in low cooling requirement conditions, one of the fans may be turned off.

Abstract: An air conditioning system includes a first indoor unit having a heat exchanger separating the inside space of a case in which air drawn from an air inlet is passed through the heat exchanger and then discharged from a plurality of air outlets, and a second indoor unit having no heat exchanger and connected with one of the air outlets via an intake duct. With this construction, the air to be distributed to a plurality of rooms is cooled or heated by a common heat exchanger. The air conditioning system thus constructed can be installed easily and has a relatively small number of structural components.

Abstract: The heat exchanger is formed of parallel rows of tubes and transverse ribs. The ribs have flat uncorrugated parts extending in zones about and along the rows of tubes as well as corrugated parts extending between the rows of tubes. The flat parts may be separated from the corrugated parts by stepped parts or fillers may be provided in the gaps between the uncorrugated parts. The gaps are to conduct a flow of medium in heat exchange relation to a flow of medium through the tubes. The crests and troughs of each corrugated part extend from the same plane adjacent a flat part and terminate in a similar plane at an adjacent flat part. Streamline-shaped inflow and outflow members aligned with the stepped part of the fin direct the flow of air.

Abstract: A zoned air conditioning system using a room air terminal which has the same horizontal dimensions as a floor tile of a raised tile floor such that the terminal may replace one tile in such a floor. The terminal includes a cool air inlet below the floor for drawing in cooling air circulated in the under floor space and a return air inlet in the top surface of the terminal. The cool air and return air is mixed in a mixing chamber and drawn from the mixing chamber by a fan and returned to the room through an outlet vent. The ratio of cool air to return air mixed in the mixing chamber is controlled by a modulating damper which is controlled in response to the temperature of the return air in order to control the room temperature in the region of the terminal in accordance with an adjustable set point. A heater is also provided in the terminal for those occasions where the return air is cooler than the set point.

Abstract: The heat exchanger comprises a plurality of semicylindrical segments, coupled so as to substantially define a circular sleeve encompassing the body to be thermally controlled, the segments being axially stacked and provided with radially extending fins including throughgoing holes, in the two opposite lateral faces of the segments there being provided recesses for housing an electric resistance, and an outer casing being moreover provided which defines, cooperating with the segments, an air conveying path which successively extends on the outer and inner surfaces of the segments.

Abstract: An industrial loader includes a fan and radiator assembly mounted above the engine thereof. The assembly comprises a housing mounted on the loader main frame. A pair of radiator cores are located in opposite sides of the housing. A pair of fore-and-aft aligned, hydraulically driven fans are mounted in the housing and operate to draw cooling air in through the cores and discharge it vertically through the top of the housing.

Abstract: In finned tube arrangements for cooling a medium which flows in the finned tubes by a second medium which flows outside of the finned tubes and transversely thereof, flow guide elements are positioned at the inflow side and/or at the outflow side of the finned tube arrangement to reduce the pressure loss and, possibly, increase the heat transfer coefficient.

Abstract: Cooling apparatus for a gas transmission system which includes radiator fans each driven in a desired direction from its respective drive-motor by way of a drive-belt with an associated belt tensioner, such belt tensioner including a one-way sprag-clutch coupled through a shaft and sheave to a respective drive-belt and having a direction of free rotation which corresponds to the direction of motion of said drive-belt necessary to produce motion of its respective radiator fan in the desired direction.

Abstract: A heat exchanger for use in a marine air conditioning system is configured to provide the maximum possible heat transfer surface for the air being conditioned. The refrigerant coils and associated fins form the heat exchanger banks as usual, but instead of a single vertical bank, two banks are positioned at an angle to each other. This configuration provides a plenum which is more effective in causing air flow across through the entire heat exchanger configuration than is the case with the thin plenum associated with a single vertical bank. A housing for enclosing the heat exchanger is disclosed, which provides desired air passages.

Abstract: There is disclosed an air-cooled vapor condenser having tube bundles mounted over the open end of the fan ring of an axial flow fan with their axes of the tubes inclined with respect to the direction of air flow and fins on the tubes which extend parallel to the direction of air flow.

Abstract: Heat exchangers depend for efficiency upon optimum fluid flow, such as air, through their fins and about tubes extending through the fins. The air flow, particularly at the ends of a heat exchanger, can sometimes be of a significantly reduced amount owing to the construction of, or arrangement of elements in, the heat exchanger. First and second cores (12,14) of a heat exchanger (10) are positioned in a general "V" configuration with their inlet ends (24,42) adjacent one another. Apparatus (64) is provided upstream of the inlet ends (28,46) of the cores (12,14) to direct the air flow in a preselected orientation to inlet surfaces (20,38) of the cores (12,14) at the ends (28,46) of the cores (12,14). Air flow is thus improved over a portion of the heat exchanger (10) to increase its heat transfer efficiency.

Abstract: A heat exchange device is disclosed in the form of a condenser for vapors containing non-condensible gases. Mechanical shutter members in the form of air foils are pivotally mounted in the exhaust stacks of the condenser for selectively blocking the exhaust stack to prevent back draft through the condenser when the respective air circulation fan thereof is inoperative. In one form of the invention, the condenser includes air recirculation ducts which also can be selectively closed by dampers to prevent back draft through the return ducts when the respective air recirculation fan is inoperative.

Abstract: A spot thermal conditioning apparatus selectively operable in warming and cooling modes includes a housing containing three blowers or fans. One of the blowers receives warm ceiling air and projects an exiting stream of the ceiling air to a conditioning compartment within the housing. A fan receives the exiting ceiling air blower stream and concurrently draws a stream of cool floor air into the compartment. The mixed air is then expelled by the fan through a louver to provide directional control of the movement of the conditioned air mass and circulation of air to an open spot work area. An additional fan or blower is provided for circulating warm ceiling air through the housing and returning it back toward the ceiling separately from the flow of warm ceiling air moved by the other blower. The apparatus also includes a closed, heat exchange system and an air flow direction control plate.

Abstract: In an air-cooled steam condenser (2, 2'), each tube of a bundle (8, 8') of finned heat exchange tubes, arranged parallel to each other and horizontally, and connecting a steam dispensing manifold (4, 4') to an outlet manifold (5, 5'), is in the form of a coil including three finned elements (12, 13, 14) which are arranged horizontally and parallel to each other in consecutive rows relative to the direction of the cooling air flow (11, 11'), and which are connected together by two elbow fittings (15, 16) positioned at an angle with a positive slope so as to facilitate the drainage of the condensate.

Abstract: The outdoor unit for an electric heat pump is provided with an upper portion 10 containing propeller fan means 14 for drawing air through the lower portion 12 containing refrigerant coil means 16 in the form of four discrete coils connected together in a subassembly forming a W shape, the unit being provided with four adjustable legs 64 which are retracted in shipment, and are adjusted on site to elevate the unit to a particular height suitable for the particular location in which the unit is installed.

Abstract: A warm air blow-out device for box-shaped stove is disclosed, which comprises a casing having a warm air flow-out path formed in an upper portion of the casing interior and air withdrawal openings formed in a bottom and a front wall lower portion of the casing and a cross flow fan extending horizontally in an upper portion of the casing interior and rotated by a motor. The opposite sides of the bottom of the casing are provided with respective legs, which include permanent magnets which can be held attracted to the top of the stove. Behind the legs, support members are provided to be in contact with the rear wall of the room heater casing for supporting the casing of the device.

Abstract: This disclosure is directed to a heat exchanger which includes a coil through which a heat exchange medium is circulated, the coil being located in one of a pair of chambers, a fan in the same chamber as the coil but located therebeneath, a partition separating the two chambers with an opening therein through which air driven by the fan can be drawn from the first chamber and introduced into the second chamber, and a door normally closing the second chamber and hinged to open under the influence of air emitted from the fan to thereby effectively create air flow during a non-heat-augmented operation of the heat exchanger.

Abstract: A heat exchange assembly includes an induced draft arrangement for simultaneously inducing drafts in right and left heat exchangers mounted on a common support. A plurality of fans are disposed with a common axis of rotation and draw air through the right and left heat exchangers, the air then being deflected upwardly by a series of venting walls associated with the fans on a one to one basis. The heat exchangers are bolted to support posts along a support and are spaced from the venting walls to maximize heat dissipation capacity.

Abstract: This disclosure is directed to a heat exchanger which includes a coil through which a heat exchange medium, such as Freon, is circulated between an inlet and an outlet, the coil defining an interior chamber having a lower chamber portion, means for generating a flame, such as a natural gas burner at a lower end portion of the coil whereby heat is introduced into the interior chamber and rises upwardly therein such that the same might be absorbed by the heat exchange medium for subsequent utilization, and the upper end portion of the heat exchanger being closed preferably by insulation material such that virtually all of the heat introduced into the interior chamber is absorbed during the passage therethrough.

Abstract: The outermost tubes (50) of a heat exchanger core (20) have not be as adequately cooled as have the interior tubes (50) by the flow of air between the fins (40) and the tubes (50). Herein, a cover (80 or 85) is connected over the edges (45) of the fins (40) defining a respective one of first and second end surfaces (70,75) and is spaced from the inlet surface (60) of the core (20). Consequently, the outermost tube (50), which is nearest the cover (80 or 85), is cooled substantially to the same degree as the other tubes (50). In one embodiment of the present invention, about a 5% increase in the thermal efficiency of the core (20) is attained.

Abstract: A fan accessory for recovering heated air generated by a heater in which ambient and heated air are induced to enter inlets into a housing, are blended within the housing, and are directed from the housing into an area to be heated.

Abstract: A fan accessory for recovering heated air generated by a heater in which ambient and heated air are passed through a housing in separate passageways and wherein the ambient air flowing through its passageway provides an aspirating effect on the heated air to increase the flow of heated air through its passageway and out of the housing and to facilitate blending of the ambient and heated air outside the housing.

Abstract: Fluid-to-air heat exchanger apparatus which maximizes heat dissipation capacity for a given base size, while reducing operating sound level. The components of the heat exchanger are vertically located in a vertically elongated housing, with the tube core and fans centrally disposed therein. Sound attenuating muffler sections are disposed above and below the tube core and fans, with the air entering and leaving the housing adjacent to the bottom and top portions thereof, respectively.

Abstract: A solar collector is described in which air passed through the collector is heated by exchanging heat with a plate which absorbs solar energy. The collector includes a lightweight frame of rectangular cross-section having an inlet and outlet for passage of air, with the top of the frame sealed by a light-transmissive cover such as a sheet of glass. Also included in the collector are an absorber plate mounted in the frame below the cover, and a jet plate spaced a prescribed distance below the absorber plate. One or both of the plates is corrugated, and holes are provided in the jet plate at locations where the gap between plates is a minimum so that during operation of the collector, jets of air are directed through the holes and impinge on the lower surface of the absorber plate to produce efficient heat transfer, while channels defined by the corrugations facilitate flow of the spent jets to the collector outlet with minimal interruption of downstream jets.

Abstract: Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passage-ways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, fan shroud means shaped and positioned with respect to the radiator core and the blades of the fan whereby the air stream induced by the fan during operation has a major component in a radial direction, and an auxiliary radiator structure axially spaced from the rotary fan.

Abstract: A highly effective and efficient dry cooling system for dissipating waste heat of a steam-electric generating power plant. The dry cooling system includes an assembly of cells or modules having passively acting heat pipes installed in a Y configuration in each module. These heat pipes thermally couple the exhaust steam from a turbine flowing in a graded duct with the atmosphere. A large fan mounted at the top of each module is driven to induce air flow past exterior heat pipe portions of the module to dissipate heat picked up from the steam in the duct. The steam condensate flows down the graded duct and collects in a hot well for return as boiler feedwater. Steam from the boiler drives the turbine and is exhausted into the graded duct to repeat the cycle.

Abstract: Apparatus for heat exchange between a fluid and air, having at least one heat exchanger element comprising a plurality of fluid tubes to which are secured heat transfer strips which define between them air passages having length .ltoreq. 25 mm., hydraulic diameter < 2 mm, with each element being at an angle of at most 45.degree. to the relative flow direction of the air before its entrance into the heat exchanger; at the rear of each element the strips are bent to extend in the discharge direction of the air issuing from the heat exchanger.

Abstract: An engine cooling system comprises a radiator through which a cooling air flow is induced by means of a fan. The cooling air flow is divided into a main stream and an auxiliary stream. Gases to be cooled, for example the exhaust gases of the engine, are mixed with the auxiliary air stream and are discharged via an outlet duct.

Abstract: A cooling tower assembly comprising a natural draught tower having, arranged in the lower part thereof but spaced above the ground, a heat-exchanger assembly comprising a plurality of V or A frames each consisting of two mutually inclined banks of finned tubes with the apices of the frames lying in a set of parallel planes or two sets of parallel planes at right angles, the frames being of different lengths, and/or comprising banks of different lengths and arranged so as to fill the major part of the plan area of the lower part of the tower.