Abstract: A heating, ventilation, and air conditioning (HVAC) system is disclosed which is capable of receiving interchangeable ventilation modules having varying degrees of air mixing abilities. A ventilation module fits inside the HVAC system and connects to a return air opening, an exhaust duct, an inlet air opening, and a supply air duct for proper routing of air to be conditioned. As ventilation needs change, a different module with appropriate ventilation characteristics can replace the existing module while keeping intact all other components of the HVAC system such as blowers, compressors, heaters, condensing coils and the like.

Abstract: A thermal exchange composition made from clay, glycol and/or water for retaining and slowly releasing hot and cold temperatures is provided. The composition can further include polyacrylamide, for mixing with water, and olivine. The composition can be incorporated and used in a variety of applications. For instance, the thermal exchange composition can be used in hot and cold packs for therapeutic treatment to sore areas of the body. Other articles incorporating the thermal exchange composition include food trays, stadium seats, and the like. A thermal delivery device is also provided. The thermal delivery device can be incorporated into a variety of articles, including toys and food containers.

Abstract: An air circulator control apparatus and method of use for at least one air circulator and a climate control system having a heater and a cooler to regulate the air temperature of a vertical column of air in a structure. The present invention seeks to overcome the negative effects of naturally occurring convection currents and improper placement of air outlets resulting in distinct zones of warm and cool air in structures. The air circulator control apparatus temporarily delays activation of at least one air circulator when used with the heater, to provide for an accumulation of warm air at or near at least one air circulator, before allowing at least one air circulator to be activated. In this manner, generally warm air is circulated in the absence of creating undesirable drafts and wind chills. The air circulator control apparatus instantly activates at least one air circulator when used with the cooler to generally circulate cool air.

Abstract: This invention provides a heating/cooling system including a heating/cooling apparatus, the apparatus comprising a blower unit connected to a heat exchanger unit and both units are enclosed within a duct structure which is continuous from an upstream input end to a downstream output end. The blower unit comprises an electric motor direct-coupled to an impeller and the heat exchanger unit comprises a heat transfer assembly and both blower and heat exchanger units are of a size and configuration as to facilitate their mounting within the space defined by, for example, a pair of building floor joists. The space between the floor joists may be enclosed to function as a return air duct to the apparatus. The heating/cooling apparatus may be adapted for humidifying and dehumidifying air being pumped through the apparatus by the blower unit.

Abstract: An integral type air conditioner intended to suppress the reduction in air conditioning ability to the utmost, even in introducing open air, includes a partitioning plate for partitioning the interior of the main body into an indoor side chamber and the outdoor side chamber. There is provided a suction port for introducing an air in the outdoor side chamber into the indoor side chamber, and a damper positioned in the outdoor side chamber for opening/closing the suction port. In the indoor side chamber, there are provided a cross-flow fan and a rear casing of the cross-flow fan. Further, on the windward side portion of the rear casing, there is provided auxiliary suction ports that communited with the suction port.

Abstract: An integrated air exchanger (10) is disclosed for controlling the volume and temperature of air exchanged between an external environment (14) and a supplied environment (16). In that regard, a relatively simple crossed damper (72) controls air introduced to the air exchanger along an external air path (18) and return air path (20) to be returned to the supplied environment in an external environment through a supply air path (24) and exhaust air path (22) in a controlled relationship. A supply coil (56) is included to effect heat transfer to the air provided to the supplied environment. A system controller (70) controls a heat source (60), compressor (62), valves (64 and 66) and the damper to achieve the desired temperature and air direction. Exchangers (134 and 178) are also disclosed for use in satisfying the heating, ventilation, and cooling demands of a plurality of different environments.

Abstract: An air conditioning system is disclosed which is capable of receiving interchangeable ventilation modules having varying degrees of air mixing abilities. A ventilation module fits inside the air conditioning system and connects to a return air opening, an exhaust duct, an inlet air opening, and a supply air duct for proper routing of air to be conditioned. As ventilation needs change, a different module with appropriate ventilation characteristics can replace the existing module while keeping intact all other components of the air conditioning system such as blowers, compressors, heaters, condensing coils and the like.

Abstract: An air conditioner having a partition for partitioning the inside thereof into indoor and outdoor sections with an intake port. A damper is provided at the intake port so that an outdoor air introduction path of the outdoor section and an outdoor air discharge path are cut off when introducing outdoor air by opening the damper. Air the outdoor air introduction path is guided into the indoor section.

Abstract: In the present invention, for facilitating inspecting of a centrifugal type fan set in an air conditioner, a fan scroll is provided having a nose portion and a scroll portion of the fan scroll which are integrally molded, and the back of the fan scroll is mounted on a partitioning plate in the air conditioner. The scroll has a vent opening in its front portion and a discharge opening in its top portion, the two openings merging and being continuous and being large enough to permit removal of the fan therethrough.

Abstract: The air handling apparatus provides a separate heating mixing air deck and a separate cooling mixing air deck each with their own return air and outdoor air supplies to maximize indoor air directed to the heating deck and monitor the cooling deck to utilize either return or outside air for greatest efficiency in the cooling deck. Near the rooms serviced by the system the air from the respective heating and cooling decks is mixed and directed through a control plate which can accommodate various filters including a germicide type. The control plate also has a bypass door allowing the filter to be bypassed if desired.

Abstract: In an air conditioning system with a return air duct, a blower and a discharge duct, a by-pass duct is provided between the discharge duct and the return air duct such that a portion of the air being delivered by the blower is caused to be returned to mix with the incoming air from the return air duct before re-entering the blower. A chemical filter is provided in the by-pass duct such that gaseous pollutants are removed from the air flowing therethrough. With the continued recirculation of air through the system, the level of contamination in the air being delivered is eventually reduced to an acceptable level.

Abstract: Self service banking system including a walk-in kiosk housing an Automatic Teller Machine (ATM). The kiosk includes a pivotable interior access door on one end thereof which is pivotable between open and closed positions and a side wall rotatable quarter panel expansion area for allowing access to the interior of the ATM. The kiosk provides a secure enclosed environment for the automatic teller machine (ATM) and its contents. An air distribution system, a laminated wall insulation, heating and cooling systems and their controls are provided to maintain the interior temperature and humidity of the kiosk within the normal temperature and humidity operational range of the computer of the ATM during exposure of the kiosk to a wide range of ambient temperatures and humidity beyond the acceptable operating temperature and humidity range of the ATM and its computers.

Abstract: A system for the economic and efficient ventilating, cooling and heating of an enclosed space, such as a room or rooms within a building, through controlled ventilation of room air between an upper hotter building portion and a lower cooler building portion with the portions constituting different temperature zones in the building. The system includes a reversible ceiling fan facility and motorized inlets in the lower building portion and motorized outlets in the upper building portion, the inlets and motorized outlets being formed in the building and communicating with the exterior thereof.

Abstract: There is provided a method and apparatus which produces a particularly high-quality fresh air atmosphere in large industrial plant buildings, the high-quality atmosphere being provided to the lower two meters of height with simultaneous heat recovery from the exhaust air and exhaust air purification. The apparatus includes a feed air tower which, as a component built in series, eliminates many of the costly ventilation ducts, reduces fuel costs to a low level, and prevents remixing with poor air from the upper layers of the air in the plant.

Abstract: A heating and cooling air conditioning system includes serially arranged conductive and evaporative pad heat exchangers through which circulating air to be heated or cooled is moved by a blower. The conductive heat exchanger contains a liquid heat exchange medium that is selectively solar heated or cooled by an evaporative heat exchanger, for example, a cooling tower. A single tank reservoir is provided for the heat exchange medium. A singular air valve controls flow of air into the heat exchangers as well as flow of return air to exhaust. A domestic hot water heating tank is disclosed with a heat exchange loop provided in the solar heated heat exchange medium reservoir tank for heating the service hot water supply.

Abstract: The invention relates to a process for operating an apparatus having a cooking area for the heat treatment of food, the heated cooking area being at least partly actively cooled prior to the introduction of new food.The invention also relates to an apparatus for the heat treatment of food with a cooking area, in which an inadequate cooking area temperature can be indicated prior to starting a heat treatment, e.g. by means of an optical and/or acoustic signal generator and/or whose cooking area is at least partly actively coolable.

Abstract: An apparatus for heating and cooling which features a unique energy recovery ventilation apparatus and method. During energy recovery ventilation, a cycling damper controls the flow of warm and cool air to maintain the inside air temperature when inside air is cycled to the outside. The outside air is then warmed or cooled when drawn to the inside.

Abstract: A room air conditioner of a window mounted unit type having an air inlet grill and an air outlet grill on a front panel of the air conditioner. The air conditioner has a blower, a heat exchanger and an air passage directing an air flow from the blower to the heat exchanger, and an air guide arrangement in the air passage. The air guide arrangement guides the air flow from the blower to the heat exchanger in a uniform manner to minimize deviation of air flow distribution in the air passage to the heat exchanger.

Abstract: A method and apparatus are disclosed for simultaneously regulating the temperature of interior air, and ventilating the interior air with air from outside by means of passing said interior air through an interior heat exchanger, simultaneously passing outside air through an outside heat exchanger, extracting a portion of the inside air, and directing it to the outside air for venting outside, simultaneously extracting a portion of the outside air and venting it to the inside air, continuously passing a heat exchange medium into one of the heat exchangers, and transferring the heat exchange medium from one heat exchanger to the other heat exchanger, via an expansion device to procure transfer of heat from one heat exchanger to the other, and passing the heat exchange medium through flow controls, responsive to temperature of the inside air, to selectively direct flow of medium either to one of the heat exchangers or to the other. Also disclosed is a method of regulating temperature by means of the system.

Abstract: A multi-mode off-peak storage heat pump system for a building which includes a unidirectional flow refrigerant circuit and a brine circuit in selective heat exchange relation with one another, each being connected to a dual coil in ducts wherein air can be circulated within and between the inside and outside of the building, and an ice bank in the brine circuit for coolness and low-level heat storage, the system providing heating and cooling with no refrigerant reversing valves or coil defrost means and with optimum off-peak power utilization.

Abstract: A through-wall heat pump air conditioner having a total heat exchanger between the interior and exterior unit rooms is disclosed for recovering waste heat from the exhaust air. The conditioner includes two auxiliary dampers respectively provided between the exhaust air path and the heat exchanger and between the intake air path and the heat exchanger, whereby penetration of external air into the room is prevented during the halt state of the air conditioner.

Abstract: Conditioned air (i.e. cooled or heated air) is supplied to spaces in a building structure via guides and air mains. The conditioned air is guided into the spaces directly from the guides, or via plenum chambers and transfer openings, or via both routes simultaneously. Circulation of conditioned air through the plenum chambers cools/heats the building structure. During a subsequent period when cooled/heated air is demanded for the spaces, air from the spaces is circulated through the plenum chambers via air return openings. Such circulated air is cooled/heated by contact with the building structure and is re-introduced as conditioned air. The building structure thus acts as a reservoir of heat to augment the conditioning effort of the air conditioning means during periods of peak demand.

Abstract: An induction cooking apparatus having a plurality of induction heating coils disposed in an array for induction-heating a metallic heating load by electromagnetic induction. Air inlet ports are formed at the front end of the appliance to admit cooling air for cooling the interior of the cooking appliance and air outlet ports are formed at the rear end of the appliance. The apparatus ensures comfortable cooking without exposing the user to hot exhaust air and, also, better cooling without drawing in hot exhaust air or hot steam from the food materials.

Abstract: An air conditioning system is disclosed for adjusting air temperature and humidity to a predetermined level for the air supply to a paint spray booth. The system includes a multi-section sprayed surface heat exchanger combined with a bypass passage such that a portion of the air flow to be conditioned passes through the multi-section heat exchanger and the remainder of the flow bypasses the same, and is recombined and mixed downstream with the conditioned air to produce a mixture which is at the proper dry bulb temperature and relative humidity. Each multisection heat exchanger may be shut off to increase the proportion of bypass flow. Modulation of the cooling and heating effect of each of the heat exchangers is achieved by modulating valve controlling the flow of heating or cooling medium. Similarly, the humidification effect is controlled by valving controlling a number of water spray nozzles.

Abstract: Heating and cooling of dwelling houses and other confined spaces is facilitated by a system in which thermal energy is transported between an air heating and cooling system in the dwelling and a water heat storage sink or source, preferably in the form of a swimming pool or swimming pool and spa combination. Special reversing valve circuitry and the use of solar collectors and liquid-to-liquid heat exchangers on the liquid side of the system, and special air valves and air modules on the air side of the system, enhance the system's efficiency and make it practical in the sense that systems employing the invention can utilize existing craft skills and building financing arrangements and building codes, and the like, without major modification.

Abstract: A ventilating system including a heat exchanger utilizing boiling and condensation of a liquid mounted in a cabinet formed with a first air passage and a second air passage by a partition plate extending horizontally across the heat exchanger substantially in the center thereof. At least one air sucking and exhausting fan is mounted in one of the first and second air passages, and the heat exchanger is provided with at least one auxiliary heat exchanger operative to perform space cooling or space heating. The first and second air passages are each provided with ventilating ports for effecting heat recovery, ventilating ports for effecting cooling by ventilation and a ventilating port for allowing cooled air or heated air to flow therethrough, so that the ventilating system can be operated in a heat recovery mode, a cooling by ventilation mode and a space cooling or space heating mode by actuating the auxiliary heat exchanger and suitably opening and closing various ventilating ports.

Abstract: A painting plant comprising a painting booth through which articles are conveyed to be painted, an air conditioning device by which the air to be fed into the painting booth is conditioned in temperature and humidity, and cleaning means for cleaning the air having passed through the painting booth is further provided with recirculating means which feeds the air having been cleaned by the cleaning means to the air conditioning device for reuse, thereby achieving energy saving.

Abstract: Process and equipment for the exchange of heat between flows of a medium flowing in and out of a building, and facade assemblies in which the process is implemented.

Abstract: Fresh, outside air may be supplied to a first space, such as a dining area of a restaurant or the like, while air from the first space may be recirculated through an air conditioning unit for cooling or heating the air, which is returned to the first space. Also, air from the first space is transferred to a second space, such as a cooking room of a restaurant or the like, which contains heat producing cooking equipment, the latter resulting in the second space having additional cooling requirements. Such transfer air is passed through a chilling device, in which the air contacts water, as through sprays or a water bath, to cool the water to a temperature close to the dew point of the air, and also to correspondingly cool the air furnished to the second space. When cooling of air to the first space is required, either the recirculated air, but preferably the fresh air, is cooled by the chilled water produced by the chilling device.

Abstract: In an evaporation type air cooler, the improvement comprising a heat exchanger wherein circulating liquid is cooled by the evaporatively cooled air and subsequently used to air condition occupant space without humidity increase, and associated air ducting and flow controls. The improvement is also adapted to be used as a space heater utilizing hot water in the heat exchanger, and to utilize hot attic or external air to aid in heating water for occupant use.

Abstract: A solar heat utilized air-conditioning system comprising: a solar heat collecting unit for producing warm water by heating a circulating heating medium water by solar heat obtained by collector plates disposed in parallel with each other; an absorption type refrigerating machine for producing cold water by provoking a refrigerating cycle, using the warm water produced by said solar heat collecting unit as the heat source for a generator; a main heat exchanger which indirectly heat-exchanges an intake fresh-air for a circulating cold or warm water in an air-conditioning unit disposed on the way of a fresh-air intake path to a space to be air-conditioned, thereby to produce cooling or heating air; an air-cooling and heating apparatus capable of selectively supplying the circulating cold or warm water to said main heat exchanger; and an auxiliary heat exchanger capable of selectively flowing either warm water produced by said solar heat collecting unit or cold water produced by said absorption type refrigerating

Abstract: The present invention refers to a heating and air-conditioning system for one or multi-storied buildings with multi-glazed windows contained in the facade of the building. A fresh air entrance arrangement is disposed below at least one of these windows on the outside of the facade of the building. A fresh air processing device is connected to the fresh air entrance arrangement with means to filter, heat or cool and humidify the fresh air and to expel the same over a distributing cavity arranged beneath the window. The distributing cavity is connected to a window cavity between the panes of the multi-glazed windows. An entrance opening arranged at the top end of the window, connected to the window cavity, extends over a good part of the width of the window and opens out toward the room to be air conditioned. A stale air flow out arrangement controlled by valves directs stale air out of the room.

Abstract: Efficiency of an open-cycle air conditioning apparatus and method for heating and cooling is improved and the economy of external power is increased both with respect to cost and energy consumption by providing a combination of a primary heater and a secondary heater for heating the regeneration stream for regenerating the desiccant means in the air conditioning apparatus. The thermal source for the primary heater may utilize waste heat or solar energy which is transferred to a solid phase thermal storage means by a gaseous phase heat exchange medium. The thermal energy may be transferred from the thermal storage means to the regeneration stream of the open-cycle air conditioning apparatus either directly by passing the air stream over the solid phase thermal storage means or indirectly by passing liquid in an enclosed system through the solid phase thermal storage means and the regeneration stream.

Abstract: An air-conditioning device having a common housing case in which there are a heat exchanger through which used air and fresh air can flow formed with plate-shaped heat-exchanger walls which are made of aluminum foil, as well as a fresh-air blower and a spent-air blower. The interior of the housing case is divided into a fresh-air passage leading through the heat exchanger and a spent-air passage leading through the heat exchanger by the stack of foils of the heat exchanger together with internal partitions in the interior of the housing; the housing partitions comprise a controllable by-pass damper through which the spent-air entry side of the heat exchanger can be connected directly to its spent-air outlet side, and comprise a controllable recirculated-air damper through which the spent-air entry side of the heat exchanger can be connected directly to its fresh-air outlet side, the fresh-air inlet and the exhaust-air outlet of the housing case being constructed so as to be able to be shut off.

Abstract: The air conditioning unit of the invention has a construction of the indoor air flow section which adapts it to receive and return indoor air either through its bottom area in a vertical air flow mode, or through its end wall in a horizontal air flow mode so that the unit may be either roof top mounted or slab mounted without the need of any added section or module furnished by the manufacturer. The indoor air flow section includes a draw-through refrigerant coil located in an upper quadrant of the section, a detachable panel separating two lower quadrants in the section for the vertical air flow mode and movable to separate a lower and upper quadrant for the horizontal air flow mode, and removable end wall panel means covering the end in the vertical air flow mode and being positioned to cover the bottom for the horizontal air flow mode.

Abstract: An air conditioning structure having a depending centrally located outlet opening and auxiliary air inlets disposed laterally with respect thereto in combination with an air handling mechanism coupled to the outlet and auxiliary air inlets thereof. The air handling mechanism is located within a special support frame for the air conditioning structure, with the frame being adapted to retain and protect insulative material adjacent the exterior surfaces of the air handler mechanism. The air handling mechanism includes a central supply duct for conducting air from the air conditioning structure to a point of use and has a pair of laterally disposed return air handler ducts for conducting and treating the air returned from the point of use to the air conditioning structure, and further includes an exhaust duct extending from the supply duct by which air from the point of use may optionally be exhausted to ambient.

Abstract: A process for open-cycle air conditioning which affords economy of external power both with respect to cost and energy consumption by providing a low-temperature heater and a high-temperature heater for regenerating the sensible heat exchanger and desiccant when the apparatus is used for cooling and the enthalpy exchanger when the apparatus is used for heating. The power source for the low-temperature heater can utilize solar energy, waste boiler heat, waste process heat, nuclear reactor heat and the like. The power source for the high-temperature heater can be an open flame burner or other conventional heater.

Abstract: Recuperative heat exchangers are disposed in the supply and exhaust ducts of a ventilating system. To reduce frost build-up at the exit end of the exhaust-duct heat exchanger, the heat exchanger is disposed so that the exhaust air flows through it alternately from one end to the other, and vice-versa, when the temperature is below freezing. The reversal of flow of the exhaust air is accompanied by a reversal of the flow of heat exchange medium so that the efficiency of heat exchange is not adversely affected. Several systems of heat exchange are disclosed.

Abstract: A plurality of parallel heat exchange tubes are grouped together and connected at the ends to form a bank. One or more banks are positioned so that one end lies in a supply air stream and the other end lies in an exhaust air stream. Each bank of tubes is sealed and contains a working fluid of the type having a liquid phase and a vapor phase. At one end of each tube, the working fluid absorbs heat from one of said air streams to effect vaporization of said fluid, the vaporized fluid flows to the cooler end of said tube where said vaporized fluid gives up heat to the cooler air stream and condenses in the tube. The condensed fluid then flows back to the warmer end by means of gravity.One end of the lowest tube in each bank includes a reservoir connected thereto which communicates with the normally cooler air path and includes a heating coil operatively associated therewith for providing a modulated control of the system responsive to the temperature of the enclosed space being ventilated.

Abstract: A compact indoor environmental control system which has cooling, heating, and ventilation components mounted and positioned to provide a slim design for in-the-wall installation. A cabinet is provided with cooling and heating components mounted to leave plenums at opposite ends of the cabinet so that air outlets can be selected on any one of five sides of the plenums. The heating, cooling and control sections are of modular design to permit full accessibility for maintenance, repair or replacement. A variety of configurations for intake and exhaust of inside and outside air are possible because of the versatility provided by the modular construction.

Abstract: An air conditioning system comprising a heat exchanger using the conduction principle to impart a portion of the heating or cooling from the air exhausted from a building or facility to a make-up air supply and a heat pump which provides supplemental heating or cooling for the make-up air supply to bring it to the desired temperature for use in the building or facility.

Abstract: In an air conditioning method and system for supplying conditioned air to an enclosed space, such as a room or rooms in a building, air is withdrawn from the room at separate positions located adjacent the floor and ceiling in order to advantageously utilize the effects of a convection within the room. Depending upon the season or the demand, air withdrawn from one of these positions is discharged into the atmosphere, while air withdrawn from the other of the positions is supplied, as return air, to an air conditioning unit, at which it is heated or cooled. A predetermined amount of outside air is also supplied to the air conditioning unit with the return air and the combined air flow, after treatment in the conditioning unit, is supplied to the enclosed air space or room.

Abstract: A ventilating system which affords recuperative heat exchange between the supply air and the spent air and which incorporates a refrigerating machine as a heat pump which may be operated either to supplement the recuperative heat exchange or to cool the supply air without recuperative heat exchange between the supply air and the spent air. The system includes a heat exchanger in the supply-air duct and a second heat exchanger in the spent-air duct. The two heat exchangers are interconnected in a fluid circuit so that during the heating season, the fluid is heated by the spent air to warm the supply air. When the refrigerating machine is operting as a heat pump, the fluid discharged from the supply-air heat exchanger is passed through the evaporator and the fluid passing from the spent-air exchanger to the supply-air exchanger is passed through the condenser.

Abstract: A food service system for institutional or other use is provided by a stack of insulated trays and a cart. In one embodiment the cart includes a heating and/or cooling source with an outlet and a return. The trays are provided with openings to permit the passage of heated or cooled air from the outlet through the stack to the return. In another embodiment the trays and cart are combined with a refrigeration unit and a heating unit to permit simultaneous heating and cooling of food portions held in the trays.

Abstract: A control system for the control of temperature within a building is provided to affect both cooling and heating of the building as required during the winter season with a minimum energy input to the building. Heat transfer is provided between the more interior areas of the building and the more exterior areas of the building so that heat generated in the more interior portions of the building is not entirely wasted by being exhausted directly to the cold outdoors. Chilled water refrigeration equipment, standard forced air systems and outdoor air are utilized to affect the desired heating, cooling and heat transfer within the building.

Abstract: An installation for continuously growing plants which includes one or more growth chambers wherein alternate periods of lightness and darkness are provided, and the environmental conditions are controlled. The plants are individually supported, and transported through the growth chambers in such a manner as to require a minimum amount of handling. A diverging track system is provided in one of the growth chambers for handling the plants in a prescribed manner and guiding them through the chamber. As the plants are moved through such chamber, increased space is automatically provided for plant growth. The installation is well suited for growing plants hydroponically.

Abstract: An air conditioning system for conditioning air in a plurality of enclosed areas in a building. Conditioned air at a relatively cold temperature level is supplied to a terminal for discharge into an area. The quantity of relatively cold temperature air discharged into the area is regulated in accordance with the temperature level therein. A control signal is generated, the magnitude thereof being indicative of the quantity of conditioned air discharged into the area. The magnitude of the control signal is monitored. Warm air supply means is activated when the magnitude of the control signal indicates that the quantity of the relatively cold temperature air being discharged into the area has decreased below a predetermined level.

Abstract: An air conditioning system for conditioning air in a plurality of enclosed areas in a building. Conditioned air at a temperature level which may be varied is supplied to first terminal means for discharge into an area. Conditioned air at a relatively constant temperature level is delivered to second terminal means for discharge into the area. The quantity of constant temperature air discharged into the area is regulated in accordance with the temperature level therein. When the temperature of the variable temperature air supply is at a relatively warm level, the quantity thereof discharged into the area is regulated in accordance with the quantity of constant temperature air discharged into the area. As the quantity of constant temperature air discharged into the room is increased, the quantity of warm air discharged into the room is decreased; and as the quantity of constant temperature air discharged into the room is decreased, the quantity of warm air discharged into the room is increased.

Abstract: A process for open-cycle air conditioning which affords economy of external power both with respect to cost and energy consumption by providing a low-temperature heater and a high-temperature heater for regenerating the sensible heat exchanger and desiccant when the apparatus is used for cooling and the enthalpy exchanger when the apparatus is used for heating. The power source for the low-temperature heater can utilize solar energy, waste boiler heat, waste process heat, nuclear reactor heat and the like. The power source for the high-temperature heater can be an open flame burner or other conventional heater.

Abstract: A ventilating unit has separate passages connecting internal and external environments, and a reversible heat pump with evaporator in one passage and condenser in the other passage. Separate reversible axial flow fans are located in the two passages. Two ventilating modes are provided, in each of which the fans are moving air in opposite directions through the passages. When the internal environment is relatively warm, the incoming air passes over the evaporator and the outgoing air over the condenser, and vice versa when the internal environment is relatively cool. Special fan design facilitates direction reversal, and also variable speed operation. The unit also has an additional inlet with a heater, and control means are adapted to provide a recirculation mode in which the recirculated air is heated thereby.