Abstract: A packaged terminal air conditioner unit includes a bulkhead and a sealed system mounted at least partially within a wall sleeve. The wall sleeve is positioned in an opening on the side of a building and defines an intake aperture and an exhaust aperture that fluidly couple the outdoor portion to the room. An intake fan assembly is mounted to the wall sleeve over the intake aperture for selectively urging a flow of make-up air into the room and an exhaust fan assembly if mounted to the wall sleeve over the exhaust aperture for selectively urging a flow of exhaust air out of the room.

Abstract: According to certain embodiments, operating an HVAC system comprises receiving zone temperature data from a temperature sensor, zone humidity-ratio data from a humidity sensor, a temperature set point from a user, and a relative-humidity set point from a user. A humidity-ratio set point is determined based on the temperature and relative-humidity set points. A first command to the HVAC system to perform a cooling operation is communicated upon determining that the temperature data exceeds a temperature threshold based on the temperature set point. Determining if the humidity data has reached a humidity-ratio threshold based on the humidity-ratio set point after determining that the temperature data has reached the temperature threshold. Operating the HVAC system according to a dehumidification-based cooling procedure upon determining that the humidity data has not reached the humidity-ratio threshold.

Abstract: The present invention provides an air purifier that includes: a purifier body; a first air blower which is provided in the purifier body to introduce, purify and discharge outside air; an air guidance part which is provided on the movement path of the air discharged from the first air blower and is pivotably coupled to the upper end of the purifier body to guide an air discharge direction; and a second air blower which is installed on the air guidance part to blow air.

Abstract: An air conditioning control system allows a supply air switching controller to alternately switch outside air control and return air control at a preset switching interval. The supply air switching controller is connected to an air conditioner placed to correspond to each room inside as an air conditioning control subject. The outside air control takes outside air into a temperature/humidity adjustment coil of the air conditioner by opening a first damper provided in the air conditioner in order to adjust an intake volume of the outside air into the air conditioner and by closing a second damper provided in the air conditioner in order to adjust an intake volume of return air from the room inside. The return air control takes the return air from the room inside into the temperature/humidity adjustment coil of the air conditioner by closing the first damper and opening the second damper.

Abstract: An energy saving air conditioning system is disclosed which provides different air conditioning modes, including a closed-loop mode, an open-loop mode, and a partial-loop mode, for controlling the environment in a high-density apparatus room. The energy saving air conditioning system uses a cloud operating center to monitor the temperature and the moisture inside and outside the high-density apparatus room. The cloud operating system dynamically selects the air conditioning mode in such a manner that energy can be saved and the environment in the high-density apparatus room can be optimally managed.

Abstract: A transportation cargo refrigeration system includes a refrigeration unit to provide a flow of supply air for a refrigerated cargo container. A refrigeration system outlet allows the flow of supply air into the cargo container. A mixing chamber is located between the refrigeration unit and the refrigeration system outlet for mixing of the flow of supply air thereby reducing supply air temperature fluctuation at the refrigeration system outlet. A method of operating a refrigeration system for a refrigerated cargo container includes flowing supply air through a refrigeration unit thereby reducing a temperature of the supply air. The supply air is directed into a mixing chamber and mixed in the mixing chamber until a selected supply air temperature is achieved. The supply air is directed through a refrigeration system outlet and into an interior of a cargo container.

Abstract: A fluid spray device system (1) that maintains a resultant fluid discharge, or a material onto which the resultant fluid is discharged, within a predetermined range of a set-point temperature by regulating the flow rate of a throttling gas using a proportional valve (22). The resultant fluid has throttling gas and cryogenic fluid components. Both the throttling gas and cryogenic fluid are preferably supplied from a single tank (11) and the cryogenic fluid supply is pressure-regulated and includes a triaxial delivery hose (33) having a return line with a back-pressure regulator (54).

Abstract: An air conditioning system comprises a housing defining a first airflow path therein between an outside air inlet over a cooling coil and an outlet for delivering outside air from said outside air inlet over said coil to the outlet, a second airflow path between a return air inlet over the cooling coil and to the outlet for delivering return air over the cooling coil, and a third airflow path between the return air inlet and the outlet for delivering return air through the housing without passing over the cooling coil. The system includes outside, return, and bypass air dampers that are sequentially moveable between open and closed positions for directing air through or preventing air from entering the first, second, and third airflow paths, respectively. A controller independently controls the opening and closing of each damper in response to data received from the sensor.

Abstract: According to one example of the present invention, a cooling system is provided. The cooling system comprises a water-cooled air conditioning module for cooling air from a chamber. The chamber is arranged for receiving air to be cooled and hot humid air. The cooling system also comprises a control system for controlling the flow of hot humid air to the chamber such that the air input to the air conditioning module has a predetermined relative humidity level within a predetermined range.

Abstract: A method for suctioning the boundary layer at the surface (1) of an aircraft having an air-conditioning system (4), at whose flow-critical points of the surface multiple suction openings (2) are provided, the air quantity suctioned via these being discharged to the atmosphere again via at least one outlet (7) placed in a way favorable for flow, the air quantity suctioned from the surface (1) being fed to the air-conditioning system (4) of the aircraft, via whose outlet (7) the air quantity suctioned is discharged to the atmosphere together with the exhaust air of the air-conditioning system (4), to reduce flow losses.

Abstract: An air conditioning arrangement for a work vehicle having a cabin includes: a hood disposed forwardly of the cabin; an air conditioning unit housed in the hood forwardly of the cabin; and a dashboard provided in a front portion in the cabin. The air conditioning unit includes a rear duct for delivering conditioned air rearward and a front duct having a portion for delivering conditioned air frontward. The front duct further has a portion extending rearward under the air conditioning unit. The dashboard includes an upper outlet, a defrost outlet and a lower outlet. Each of the upper outlet, the defrost outlet and the lower outlet is communicated with either one of the front duct and the rear duct.

Abstract: A device (10) for supplying preconditioned air to an aircraft on the ground, comprises a compressed air inlet (16) and a compressed air hose (34) having a first end connected to the compressed air inlet (16) and an opposite second end for connect to a remote, ground-based, compressed air unit. Expander means (14) are situated downstream of the compressed air inlet (16) for allowing the compressed air to expand to lower pressure and temperature. The device (10) further includes an ambient air inlet (24) and a mixing chamber (22) downstream of the expander means (14) and communicating with the ambient air inlet (24) wherein mixing of ambient air with the expanded, cold air is controlled in such a way as to elaborate preconditioned air at the desired temperature. A connection hose (28) has a first end in communication with said mixing chamber and a second end to be connected to an aircraft on the ground.

Abstract: Disclosed is an air conditioning apparatus which is provided with two adsorption elements (81, 82). The air conditioning apparatus repeats in alternation an operation in which the second adsorption element (82) is regenerated and, at the same time, air is dehumidified by the first adsorption element (81), and an operation in which the first adsorption element (81) is regenerated and, at same time, air is dehumidified by the second adsorption element (82). Additionally, the air conditioning apparatus includes a refrigerant circuit. The refrigerant circuit performs a refrigeration cycle in which a regenerative heat exchanger (92) operates as a condenser and a first cooling heat exchanger (93) or a second cooling heat exchanger (94) operates as an evaporator. For example, air, which has robbed heat of adsorption in the first adsorption element (81), is further heated by the regenerative heat exchanger (92) and is introduced into the second adsorption element (82).

Abstract: A method for semi-autonomous operation of a robotic device in a room. In the method, one or more goal points are set and the distances between the robotic device and the one or more goal points are determined. A first one of the one or more goal points is selected and the robotic device is maneuvered to travel to the first one of the one or more goal points.

Abstract: An adsorption element (81, 82) is formed by an alternating lamination of flat plate members (83) and corrugated plate members (84). Each flat plate member (83) is a given rectangle of L1/L2=2. In the adsorption element (81, 82), humidity adjusting side passageways (85) are opened on side surfaces of the adsorption element (81, 82) which are located on the longer-side side of the flat plate members (83). Additionally, cooling side passageways (86) are opened on side surfaces of the adsorption element (81, 82) which are located on the shorter-side side of the flat plate members (83).

Abstract: In a method of making available temperature controlled air for a first region and a second region in a vehicle, a cold air flow and a hot air flow are generated. At least one first cold air part flow and one first hot air part flow respectively are formed from the cold air flow and from the hot air flow and the first cold air part flow and the first hot air part flow are mixed to form a first temperature controlled part flow for the first region. Furthermore at least one second cold air part flow and one second hot air part flow respectively are formed from the cold air flow and the hot air flow and the second cold air part flow and the second hot air part flow are transported separately by means of an auxiliary blower and are mixed downstream of the auxiliary blower to form a second temperature controlled part flow for the second region.

Abstract: A method for adjusting and maintaining a desired room climate with regards to temperature, humidity, and carbon dioxide concentration at a given charge of heat, humidity, and carbon dioxide. A proportionate amount of outer air is cooled to a saturation temperature and then dehumidified. The saturation temperature results from the intersecting point of the saturation curve of humid air, and a straight line which extends through the point of state of the air being in the state of the desired climate of the room air, and the point of state of the available outer air in an h,x diagram, i.e., provided with a rise of the quotient of the heat charge in relation to the humidity charge.

Abstract: A dual path single coil dehumidification system is provided. The system includes a housing that is mounted onto the top of a building that is to be dehumidified. The system draws in outside air which is circulated along its own dedicated path. A cooling coil is disposed in the dedicated outside air path. The outside air therefore passes over the cooling coil and is dehumidified prior to being mixed with any other air. The system also draws in return air from the interior of the building. The system is arranged so that the return air is drawn over refrigeration units that are located in the building to cool the return air. The cooled return air is then drawn into the housing where it is mixed with the outside air only after the outside air passes over the cooling coil. The mixed dehumidified outside air and the cooled return air form a supply air stream that is delivered to the interior of the building.

Abstract: This invention provides a fundamentally new approach to air conditioning. In a conventional air-conditioning system air the full volume of air is cooled below the dew point to provide both sensible and latent cooling. In the new system, dehumidification and sensible cooling functions are preferably separate. The separate dehumidification allows for much higher supply air temperatures, preferably within about 10° F. of the space temperature. Low-velocity air distribution through a ceiling plenum or a vent into the space allows for very low fan static pressures, which greatly reduces fan energy use compared to conventional ducted systems. The low static pressures and high supply-air temperatures allow the use of existing drop ceiling construction with little modification. The system can also include low-cost thermal storage. Latent thermal storage is in the form of a concentrated liquid desiccant solution. Chilled water storage is another option.

Abstract: A method of air conditioning system temperature control for a motor vehicle is disclosed. The method includes the steps of measuring an air conditioning compressor discharge pressure and determining if the discharge pressure is greater than a predetermined maximum pressure. The method also includes the step of beginning a forced recirculated air mode if the discharge pressure is greater than the predetermined maximum pressure. The method further includes the steps of determining if the air conditioning system is already in a forced recirculated air mode if the discharge pressure is less than the predetermined maximum pressure, and determining if the discharge pressure is less than a predetermined acceptable pressure if the air conditioning system is already in a forced recirculated air mode. The method still further includes the step of beginning an outside air mode if the discharge pressure is less than the predetermined acceptable pressure.

Abstract: This disclosure features a single package vertical air conditioner (both evaporator and condenser) in an easily installed cabinet. The cabinet includes a chassis above a dual level drain pan having a sump. The pan sits on a set of rubber feet to enable mounting. Side openings align with a telescoping two part plenum to connect to a louvered grill on the outside of a building to enable fresh air input and heat exchange.

Abstract: An apparatus for providing a conditioned airflow inside a microenvironment using a portion of the breathing supply diverted to an ejector from a breathing respirator gas stream, is described. The respirator includes an expansion ejector and the microenvironment air or ambient air or both is flowed over and contacted with the ejector to condition the air by cooling and dehumidifying it. The conditioned airflow is set up by the ejector which expels a portion of the breathing gas stream into a venturi to create a low pressure zone for entraining the microenvironment air or ambient air. The conditioned airflow is then directed to the user's body to reduce user heat stress. Broadly, the air conditioning apparatus is useful with any housing for a controlled physical environment in which a person or group of people can endure surrounding inhospitable conditions.

Abstract: A refrigerator includes a refrigerating compartment, a freezing compartment disposed beneath the refrigerating compartment, and a vegetable compartment disposed beneath the freezing compartment. Air discharged from the refrigerating compartment is conducted to the vegetable compartment. Air discharged from the freezing and vegetable compartments is conducted to the evaporator. Before reaching the evaporator, the air discharged from the freezing and vegetable compartments is combined to create a single air flow of uniform temperature entering the evaporator. The cool air discharged from the freezing compartment is discharged therefrom through separate outlets disposed at front and rear ends of the freezing compartment.

Abstract: A sensible cooled air conditioning system comprised of a primary wet-dry side sensible heat exchanger using water refrigerant that changes to its vapor phase at the wet side by adsorption of sensible heat from the useful conditioned air passing therethrough and into a supply air duct, a blower for moving conditioned air through and from said duct, and the wet side air being exhausted as vapor laden humidified air, and a secondary refrigeration air conditioner for cooling and/or heating and removed from the supply air duct to eliminate pressure drop in said duct by an inlet opening from the supply air duct to receive a portion of said conditioned air and by an outlet opening into the supply air duct to return said conditioned air with additional sensible cooling and latent heat cooling for dehumidification, and a blower for moving conditioned air independently through the secondary refrigeration air conditioner.

Abstract: A method and apparatus for conditioning the temperature and humidity of unrecycled ambient air within a certain climatic window of parameters to a desired point within a certain conditioned window of parameters is provided that comprise directing part of the ambient air through a cooling coil and humidifier connected in series and directing the other part of the ambient air through a bypass duct and recombining the bypass air with the conditioned air to create an air stream at the desired temperature and humidity. The air passing through the cooling coil and humidifier is overcooled and then brought to the desired condition upon combination with the bypass air.

Abstract: A method and apparatus for controlling a temperature in a refrigerating chamber of a refrigerator by sensing the temperature of cold-air by firsh and second temperature sensors disposed in the vicinity of cold-air suction and in feed ports, and finely adjusting the suction and feeding of the cold-air by fans disposed in the ports and dampers disposed in the suction port and a cold-air feed passage according to the sensed temperature conditions, whereby local over-refrigeration and cold-air drift phenomena developed in the refrigerating chamber are prevented and the temperature in the chamber is uniformly controlled.

Abstract: An industrial electronics air conditioner has a cabinet with top, bottom, side and end panels, an electromechanical refrigeration system within the cabinet, an easily removable elongate condenser blower and motor module which comes out and goes in transversely when a side panel is removed, an easily removable evaporator blower and motor module having a centrifugal blower wheel and manual latches for retention to and removal from an end panel, a unique improved structure of intersecting interior barriers defining air outlet plenums and crossing hot ambient and cooled load outlets, and unique corrugated plastic exhaust ducting for exhausting hot ambient air to the outside of an electronics enclosure. A method of installing the air conditioner within the enclosure is also provided.

Abstract: A refrigerator-freezer has a separate controlled temperature compartment and method that includes a freezer air siphon for drawing air from a horizontal mid-portion of the freezer and mixing the freezer air within a plenum with air circulating through the separate compartment. An air return is provided to the freezer from the separate compartment, while an inlet in the plenum, at which is mounted a temperature sensor for controlling a fan, draws air from the compartment into the plenum for mixing and for recirculation.

Abstract: The hypobaric preservation of respiring plant matter without the step of humidifying the storage atmosphere by contacting it with a supplementary body of heated water is hereby disclosed, characterized by storage at controlled and correlated conditions of temperature, subatmospheric pressure, evacuation rate, air recirculation rate and air intake rate, and by the dependence of each set of correlated conditions upon the weight, respiration rate and type of plant matter. Expanded relatively dry atmospheric air is passed into and humid rarified air is withdrawn from the storage chamber at rates which maintain an optimal steady-state oxygen partial pressure for each type of respiring, oxygen-consuming plant matter, and a nearly saturated relative humidity sufficient to keep the temperature of the respiring, heat producing plant matter equal to or slightly higher than the temperature of the chamber walls and rarified air.

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: The disclosure relates to a method of air conditioning a multi-storey building having a core area and a plurality of occupied spaces disposed around said core area and arranged in zones. The method includes the steps of recirculating air in each said zone from the occupied spaces in said zone to a common fan compartment and back to said spaces through individual ducts, while maintaining the air entering said ducts at a temperature at least substantially as high as the temperature of the air returned to the fan compartment from said spaces. The air flowing through each duct is individually cooled in the event that the temperature of the air in the associated space is above the required temperature. Conditioned fresh air is delivered to the core area of the building for cooling said area and make-up air is delivered to the individual zones of the building from said conditioned fresh air as required. An air conditioning system is also disclosed.

Abstract: An assembly for dehumidifying air, such as in swimming pool enclosures, comprises a heat pump system including a compressor, an evaporator, a condenser and a thermostatic expansion valve. A brine liquid system forms a closed loop through which brine liquid is circulated, and the brine is maintained at a temperature below the dew point of the air by, for instance, circulating the brine through a pipe system in the earth's crust. A cooling surface is in heat-conducting communication with the evaporator and with the brine liquid. The air to be dehumidified is passed over the cooling surface to be dehumidified, and over the condenser for selective heating. The compressor can be run selectively when heating is desired, or when needed to keep down the temperature of the brine liquid. A heat exchanger connectable in series with the condenser can function to heat the water of the pool.

Abstract: A method of cooling air in a space and air conditioning apparatus for carrying out this method. Primary air at a temperature much below the temperatures used in conventional systems, is mixed with secondary drawn from the space, the mixture then being introduced into the space in order to cool it. Mixing takes place in a venturi diffuser or mixing device which enables a high induction ratio to be achieved. The system is more efficient and less costly to install and operate than the conventional systems. In one embodiment, some or all of the primary air may be drawn from the space, thereby avoiding the wasteful discharge of cold air to atmosphere.

Abstract: A system is disclosed for minimizing the energy consumption of an air conditioning system by selecting the position of the outside air damper which will require the lowest total energy input into the system. The system includes sensors for generating signals dependent upon the temperature and humidity of the outdoor air, return air and discharge air, a damper position controller for generating a damper position signal dependent upon these outputs and a control means for receiving said damper position signal for adjusting the position of the outdoor air damper at a position requiring the lowest total energy input into the system for establishing a desired set of conditions.

Abstract: A cooling arrangement, particularly for a no-frost refrigerator, including a heat-insulated housing, containing air; heating means located in said heat-insulating housing for heating a portion of said air; cooling means located in said heat-insulating housing for cooling a portion of said air; and air guiding means for mixing at least a portion of the heated air with a portion of the cooled air.

Abstract: A simple climate control device is disclosed which can independently, or jointly, to the degree desired, ventilate and/or dehumidify and/or cool a dwelling. The device provides a way of supplying fresh outside air to a building or other space at a preferred humidity level while optionally cooling the inside air, and as desired dehumidifying the inside air to maintain the inside environment at a preferred temperature and at a preferred relative humidity, with gradual displacement of stale air by fresh air.