Abstract: A method and apparatus for integrating operation of a heat pump and a separate heating source are disclosed. The combination of a heating lockout relay and an interlock relay are utilized to provide for fail safe integrated operation including providing for selected control functions and for isolating other functions to prevent a failed electrical component from operating the system in an undesirable manner.

Abstract: A heat exchanger having an outside coil, a tray beneath the coil for collecting condensate from the coil, a discharge conduit of the tray being positioned to discharge condensate from an entrance point to an discharge point of the discharge conduit, and a by-pass conduit portion disposed in the discharge conduit in fluid communication with a heat exchange medium of the coil to prevent conduit from freezing in the discharge conduit, the bypass conduit portion being defined by a pair of legs and the bight whereby the heat exchange medium flows through one of the pair of legs in a direction from the entrance point toward the discharge point and then is reversed by the bight to flow in the other of the pair of legs in a direction from the discharge point to the entrance point.

Abstract: An automotive air conditioner device includes an air duct, a blower motor for producing an air stream to be supplied to an automotive passenger compartment through the air duct, a heat exchanger having a heater and a cooling device, and an electronic control device. The electronic control device includes various sensors, a microcomputer for executing computation processings of output signals from the various sensors in accordance with a predetermined program and producing a first and a second control signal, a drive circuit responsive to the first control signal for changing a temperature adjusting value of the heat exchanger and another drive circuit responsive to the second control signal for changing the cooling power of the cooling device, thereby to control the air temperature within the automotive passenger compartment at a desired value.

Abstract: A heat radiation control device comprises a base plate with an apparatus as a heat generating body mounted on one face thereof, a radiating plate disposed on the other face side of said base plate at a given space therebetween, and a bellows having a contact plate facing the radiating plate and connected with the other face of said base plate, the container being capable of expanding and contracting so that the contact plate may be brought into contact with and separated from the radiating plate. A working fluid is sealed in the bellows to expand the bellows so that the contact plate may abut against the radiating plate to radiate heat through the radiating plate when the amount of heat from the apparatus transferred through the base plate exceeds a predetermined value.

Abstract: Heat recovery attachment in combination with the combustion gas discharge duct of a gas-fired or oil-fired heating apparatus having a liquid or air circuit, substantially comprising a heat exchanger having a supply and a discharge connection for the combustion gases to be passed therethrough, and a fan which encourages combustion gases to flow through the heat exchanger. The heat exchanger extends at most partly into the combustion gas discharge duct, and means are present to direct the exit gases, after heat exchange, obliquely upwards into the combustion gas discharge duct in such a manner that they form a gas barrier extending substantially across the transverse section of the combustion gas discharge duct.

Abstract: A heat exchanger for high temperature operation has a ceramic-walled chamber traversed by ceramic tubes and is capable of use inter alia in fluidised bed applications. The tubes are arranged in series of successive banks and to give a compact arrangement the successive banks of tubes at different levels are disposed transversely to each other. The tubes may have internal and external reinforcing means to allow them to withstand the loads imposed by the fluidised bed and generally to allow longer tubes to be used in ceramic constructions. The internal reinforcing means may also provide restrictions that in fluidised bed applications can function to minimise the effects of tube wall fracture by reducing carry-over of bed particles seeping into the tubes. For improved end sealing, means can be provided to hold resilient ceramic seals compressed against the tube ends while permitting axial thermal movement of the tubes.

Abstract: A practical and economical heat pump system stacks the evaporator, compressor, condenser, and expander to use heat from household wastewater more efficiently and effectively. A novel wastewater storage tank treats the wastewater to remove particulates while it supplies its warmest water to the evaporator to provide heat to the refrigerant in the heat pump unit. Heated water exiting the condenser is stored in a separate tank, such as an ordinary hot water heater. The system automatically ensures that the wastewater does not freeze in a substantial amount in the evaporator.

Abstract: A selected segment heating system including: means for heating a fluid; conduit means for conducting the fluid from the outlet to the return inlet of the means for heating through a plurality of areas; means, interconnected with the conduit, for moving the fluid through the conduit; gauging means for operating the means for moving to move a segment of the heated fluid in the conduit as far as the return point of the farthest area to be heated; and delay means for suspending operation of the means for moving for permitting a predetermined heat exchange to occur between the heating fluid and the air in the area to be heated.

Abstract: A two-stage thermostat means for an add-on heat pump installation provides separated control of a furnace and a heat pump. The two-stage thermostat means utilizes a single pole, single throw switch means, and a single pole, double throw switch means to properly stage and control a heat pump and a fossil fueled furnace so that they do not overlap. The control of the temperature of the heated area is independent of any need to connect a circuit between the thermostat in the heated area and any type of thermostat at the heat pump itself.

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: Fittings for the mounting of a radiator to the metalwork of an automotive vehicle, or for mounting attachments such as fan shrouds or cooling fans, are suitably positioned within the core of the radiator and attached in position during the bonding cycle for the radiator assembly or adhesively joined to the radiator core after the bonding cycle.

Abstract: This disclosure relates to a heat exchanger which includes an A-coil through which a heat-exchange medium (refrigerant) is circulated between an inlet and an outlet thereof, a compressor in fluid communication with the outlet for compressing a vapor phase of the heat-exchange medium, and means for generating heat beyond and as an augment to ambient temeprature sufficient to transform the liquid phase of the heat-exchange medium to its vapor phase during the passage of the heat-exchange medium from the inlet to the outlet with substantially total absorption of the heat by the heat-exchange medium for subsequent extraction of the heat from the vapor phase to effect desired heating.

Abstract: Manipulator for positioning a tube probe at tube mouths of heat-exchanger tubes by remote-control of the tube probe which is connected to a flexible supply line for inspecting and/or repairing the heat-exchanger tubes, the tube mouths being disposed in a tube sheet and extending over an approximately semicircular tube field defined by a chord, includes at least three clamping devices distributed over the length of a carrying body fixed to the tube sheet and being lockable independently of one another in respective tube mouths of the tube sheet, the clamping devices being formed as insertable and retractable expanding mandrels extending from the carrying body towards and spacing the carrying body from the tube sheet, a boom having a swivel head by which it is fastened to a rotary shaft of a swing drive seated on the bearing surface of a support facing towards the tube sheet, a mouthpiece disposed at a free end of the boom and spaced from the rotary shaft a distance greater than a perpendicular distance of the

Abstract: A charge air cooler is provided for mounting within the intake manifold of a combustion engine. The charge air cooler comprises a heat exchanger core formed by a plurality of relatively lightweight heat transfer elements defining a first flow path for charge air prior to ingestion of the charge air by the engine and a second flow path for a coolant in heat transfer relation with the charge air. The heat exchanger core supports at least one transversely extending rigid mounting sleeve for receiving a mounting bolt passed through a bolt-receiving hole in the intake manifold to secure the charge air cooler within the intake manifold.

Abstract: Embossed patterns on fins for the tubes of a shell and tube type heat exchanger for increased efficiency and heat transfer rate, with minimum additional pressure drop. The fins extend transversely across most of the tubes in the tube bundle and have apertures through which the tubes pass. The embossed patterns, which have a "bow tie" configuration are spaced between adjacent tubes and have a generally convex or concave shape with respect to the planar surface of the fin. Each embossed area has a crest and a pair of opposite sides which slope from the crest down to the planar fin surface, and a pair of opposite arcuately shaped sides which slope from the crest to the planar fin surface, and which have arcs that conform to the arcs of the adjacent tubes. An array of such embossed areas are provided on the fin, and a plurality of fins are placed side by side in the heat exchanger to provide a large surface area for fluid contact.

Abstract: The combination of an electrically conductive hollow body, a step-down transformer operable at a frequency greatly in excess of 1 kHz and solid phase temperature depressing means is used to realize the invention in its method and apparatus aspects. The temperature depressing means serve to bring the hollow body to a given depressed temperature so that when a gas component entrained in a gas carrier with which it forms mixture is passed through the hollow body for a period of, say, a few minutes the gas component condenses in the hollow body. The condensed component may later be freed and re-injected into the carrier by a process of thermal desorption which is achieved by direct ohmic heating of the hollow body via of the step-down transformer. The desorption time would typically extend over some ten seconds or so, as against the condensation time of several minutes, with the result that the gas component is concentrated in time, i.e.

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: A rotary engine includes a housing defining an annular space in which two block-like pistons, each having a first side, are arranged for orbiting movement in opposite directions and so as to come into a face-to-face engaging state across the width of the annular space, with their first sides directed toward each other, at each of two opposite locations in the housing. At least one of the pistons has a concavity at its first side so that when the pistons are in their face-to-face engaging state, a sealed chamber is defined between them. An arrangement of pins connected with the pistons and riding in grooves provided in the housing enables the pistons to rotate as a unit about an axis of the unit by 180.degree. in one sense while engaged at either of the said locations and then to pivot individually by 180.degree. in the opposite sense after separating and preparatory to approaching each other for engagement at the other location.

Abstract: In a gravity head geothermal energy conversion system, downwardly flowing working fluid is supplied to a downwell turbine pump in heat transfer relationship to the upwardly flowing geothermal brine. The working fluid which is used to drive the downwell turbine pump is reheated by conveying the working fluid upward in heat transfer relationship with the geothermal brine to a predetermined point.

Abstract: A cooling system for a machine tool utilizing an independently operated fan. The machine tool power transmission housing mounts the fan to draw the cool, ambient air through the housing in a heat exchange relationship with the heat generating elements of the power transmission means. The fan is automatically operated by means of a temperature monitoring switch mounted on the power transmission housing. The drive motor housing is independent of the power transmission housing and is constructed and defined to permit the motor to draw in the cool ambient air in a heat exchange relationship with the motor when it is operative and to expel the hot air therefrom.