Abstract: In an air conditioner of vehicles including a fan for sending air, a cooling unit for cooling air sent by the fan, a heater for heating air sent by the fan, an air mix damper for adjusting the amount of air passing through the heater and cooled by the cooling unit, and a control unit for controlling an opening of the air mix damper in response to a cooling and heating load, a controller for an air conditioner of vehicles has a dehumidifying operation mode in which the opening of the air mix damper is adjusted to effect the air conditioning operation and an energy saving operation mode in which the duty ratio of turning on and off a compressor is changed to effect the air conditioning operation, and comprises a fan drive control unit for increasing the amount of wind in a region where the cooling and heating load is large.

Abstract: In a heat exchange unit that recovers waste heat from carbon black smoke by preheating oxygen-containing gas such as air being passed to a carbon black producing reactor, a control loop is provided that automatically diverts the oxygen-containing gas being preheated through a by-pass line if the temperature of the effluent smoke being removed from the heat exchange is below a minimum temperature value in order to minimize the deposition of carbon on the heat exchange surfaces in said heat exchange zone.

Abstract: A turbine power plant consisting of a closed loop steam turbine system and a closed loop exhaust turbine system. An external fuel source is used to drive the steam turbine system. The heat energy of the hot exhaust fluid of the steam turbine system is transferred to the exhaust turbine system, therefore driving the exhaust turbine system. The turbines used in this invention are designed to allow a heat exchange relationship between the closed loop cycle of the steam turbine system and the closed loop cycles of the exhaust turbine system. In the closed loop steam turbine system, the hot exhaust fluid of the steam turbine system flows through a conduit where it gives up heat energy to the turbines of the exhaust turbine system, prior to reaching a condenser. The working fluid, now in a liquid phase, flows through a pump and then collects heat energy from the exhaust fluid of the turbines in the exhaust turbine system, preheating the working fluid prior to reaching a heater and the steam turbine.

Abstract: An automotive air conditioning system has a DEMIST mode which is operative at least in VENT or BI-LEVEL modes for switching conditioned air flow from an upper vent air outlet to a defroster nozzle. In the DEMIST mode, the temperature of air discharged through the defroster nozzle is controlled according to a previously selected, desired temperature so that the air discharged through the defroster nozzle can perform defrosting or demisting of the front windshield as well as conditioning of the temperature in the vehicle cabin. A blower speed control system responds to selection of the DEMIST mode by temporarily adjusting the variation range of the blower speed to not less than a medium speed for a given time period. This helps speed the defrosting or demisting effect of the air conditioning system.

Abstract: Cooling-bladder assembly for installation around the mixing chamber of a sandmill or the like is provided having a pair of semi-circular bladder halves with inner and outer walls for defining an enclosure. Inlet and outlet ports connected to a suitable pump circulate coolant fluid through the enclosure, the bladder halves being secured together at the opposed vertical edges. Spacers in the form of hollow pipe section are connected to the inner and outer walls of the bladder for maintaining the integrity of the enclosure and for creating turbulence in the coolant fluid. A heat transfer or conductive paste may be applied to the outer wall of the mixing vessel or to the adjacent inner wall of the bladder to facilitate the transfer of heat from the sandmill mixing vessel to the bladder assembly.

Abstract: A cooling system for maintaining the temperature within electronic equipment has a circulation system for pumping a cooling liquid, such as water, through the electronic equipment where it picks up heat generated by the electronic equipment. The cooling liquid is pumped through a plurality of heat exchangers using a refrigerant which is, in turn, pumped through a compressor-condensor combination, each heat exchanger having approximately the same cooling capacity. A central control selects the number of heat exchangers which are to operate at any given time, on a basis of the differential in the temperature of the water being pumped into and out of the electronic equipment. This maintains a desired and relatively wide range of temperatures. A heating element selectively and controllably heats the cooled water to bring the wide range of temperatures to a selected and fixed temperature.

Abstract: An indicator light for an ice fishing tip up includes a lighting device, a holding member for mounting the lighting device and a circuit interrupter for insertion in the circuit of the lighting device. The interrupter is attached to a movable part of the tip-up such that upon actuation of the tip-up the circuit of the lighting device is completed to cause the lighting device to illuminate for signaling purposes. The lighting device circuit interrupter and holding device are readily mountable upon and useable with a conventional form of ice fishing tip-up.

Abstract: Housings for high intensity lamps are assembled from extruded elements interlocking without fasteners. The assembled housings feature longitudinal ventilation slots for convective cooling of the fixture. The ventilation slots have grooved edges for receiving mounting hardware which can be continuously positioned at any point along the housing.

Abstract: A vacuum condensor with a condensate trap consisting of a horizontal cylindrical housing with a neck has two bottoms which are closed by covers, and inside the housing there are mounted heat-exchange bodies. Externally of the housing there are connected a deaeration device and a condensate pump. The heat-exchange bodies can be either pipes or plates.

Abstract: Heat exchanger having a tube plate made of plastic, in which metallic tubes are fixed. The tube plate has elevations having openings for accommodating the tube ends, with the openings being subdivided into three sections in axial extension. The center section has the smallest cross-section and the end sections are in each case widened. The elevations extend on both sides of the tube plate, the total height of the elevations located in the area of an opening, inclusive of the tube plate thickness, being about 1.8 to 2.5 times the single tube plate thickness.

Abstract: A system for the air-conditioning of the interior of a motor vehicle having an engine cooling circuit is provided which has a water/air heat exchanger and a water/water heat exchanger connected in series in the engine cooling circuit. The water/air heat exchanger is arranged upstream of the water/water heat exchanger. The water/water heat exchanger is between the water/air heat exchanger and panel heat exchangers which are located in the interior of the vehicle.

Abstract: The room temperature control unit is provided with a switch for determining whether the room is vacant or occupied and if required with a switch for determining whether the room is cooled or heated, so that the room temperature is controlled while the room is vacant to be somewhat (e.g. 2.degree. C.) higher than a set temperature when the room is cooled, and somewhat (e.g. 2.degree. C.) lower than a set temperature when the room is heated. For that purpose, at least two common contacts are provided and they are connected to switch contacts in different ways so that one common contact is selected according to whether the room is vacant or occupied.

Abstract: In a warming panel of a construction, wherein liquid for a heat insulating layer (3) is injected into an interior space of an outer shell structure (8) of a hollow planar construction, there is provided a buffer plate (13) or a flow guide plate (20) in the interior of the abovementioned outer shell structure (8), where the abovementioned liquid to be injected is impinged, to thereby restrict the flowing direction of the liquid as injected so as to make it possible to prevent the high pressure injected liquid from impinging on those fixed parts (6) provided in the outer shell structure (8) or those connected portions (1B) of the outer shell structure, thus avoiding unnecessary shifting of the fixed parts (6), or deformation or damage of the connected portions of the outer shell structure (8).

Abstract: A radiator arrangement for a motor vehicle has air inlet openings in the front of the arrangement and lateral air discharge openings. The arrangement is composed of an air guiding housing which has two separated spaces for receiving the water radiator and the oil radiator respectively. Separate air inlet ducts are provided for the spaces and a combined air guiding duct combines the air flows downstream of the radiators. The air is then discharged through lateral discharge openings in the side walls of the vehicle located ahead of the front wheels.

Abstract: Disclosed is a heat exchanger arranged such that a plurality of groups of cuttouts are formed on the surfaces of flat fins as between vertically adjacent heat transfer tubes by providing a plurality of cutouts, including two openings extending transverse to the direction of the air flow and two legs nonparallel with said direction of the air flow, on the front and reverse sides of the flat fins. This arrangement remarkably reduces the heat resistance between the air and the fin surfaces. Since the plurality of cutouts or the plurality of groups of cutouts are formed in the identical configuration, maintenance of a mold can be facilitated.

Abstract: A heat exchanger of the type characterized by a plurality of heat exchanger tubes separated by cooling fins. The ends of the tubes being inserted into a leadless header plate and thereafter brazed thereto. The overall depth of the heat exchanger being approximately equal to the width of the heat exchanger tube plus twice the thickness of the material of the header plate. Heat exchange tube ends being inserted into slots formed in the header plate by use of an alignment tool.

Abstract: The present invention relates to an improvement to a nitrogen or carbon dioxide rejection process used in an enhanced oil recovery project. In rejection processes for enhanced oil recovery projects at least a portion of a feed stream from the reservoir is precooled in a heat exchanger before distillation to separate the feed stream into a nitrogen or carbon dioxide fraction and a methane fraction. The improvement to this rejection process is the precooling of the feed stream by heat exchange with the nitrogen or carbon dioxide fraction and the methane fractions in a plate-fin heat exchanger with at least three circuits.

Abstract: A method of and apparatus for controlling the heat deformation of machine tools having a plurality of frames is disclosed in which the temperatures at symmetrical or opposite portions of the frames are measured, analyzed and then utilized to maintain the temperatures of the frames at the same temperature, or to maintain a constant temperature difference between the frame portions. The frame portions may either be heated or cooled to obtain the desired temperature.

Abstract: An interdome enclosure system takes advantage of the latent heat of condensation for energy efficiency. The system includes, in combination with a humid environment, such as a heated pool and an outer enclosure housing the pool, an inner enclosure disposed within the outer enclosure and over the pool and a differntial fan operated heat exchanger for creating an atmospheric pressure within the space between the inner and outer enclosures which is positive relative to the atmospheric pressure within the inner enclosure. The heat exchanger includes a pair of conduits disposed in heat exchange relationship to one another. Assisted by an inlet fan, one conduit communicates dry, fresh cool air from the exterior of the outer enclosure into the space between the enclosures, while the other conduit, assisted by an exhaust fan, communicates moisture-laden, warm air from the inner enclosure directly to the exterior of the outer enclosure.

Abstract: An improved cylinder head fastening arrangement for an internal combustion engine that permits location of overhead cam shafts directly over the cylinder head fasteners. The cam shafts are formed with access openings that extend through them which permit a tool to be passed for tightening of the cylinder head fasteners without removal of the cam shaft.