Abstract: A ventilation unit for a freezer chamber, with a conduit and at least one heating element, wherein in the conduit, at least in sections, an air-permeable filler material is disposed, as well as a freezer chamber with such a ventilation unit as well as methods for operating such ventilation unit.

Abstract: An air conditioning apparatus has, a first domed door comprising a first pivot and a first sealing surface, and a second domed door comprising a second pivot and a second sealing surface, wherein, said second pivot is positioned different from said second pivot. With the above structure, the radial gap between the first sealing surface and the second sealing surface is varied when at least one of the two domed doors is moved. Accordingly, the air conditioning apparatus described above does not have to set the constant small radial gap or constant wide radial gap for the sake of reducing unintentional air leaking or preventing said friction.

Abstract: A refrigerator includes a pressure adjustment device that passes through an inner case and an outer case such that the inside and outside of the refrigerator communicate with each other, and the pressure adjustment device is opened and closed according to opening and closing of a door so as to remove a pressure difference between the inside and outside of the refrigerator, thereby facilitating opening of the door.

Abstract: A modular air grill is taught having a removable return register and a removable supply register. The supply register may be replaced with a blank when adequate cooling or rapid cooling has occurred and the cooling through the ducts is desired rather than immediately adjacent to an air conditioning unit.

Abstract: Embodiments of the invention provide an air conditioning unit that includes an intake vent, an exhaust vent, a return vent, a supply vent, and an economizer assembly including a sliding damper and a partition. The partition includes an opening through which air can flow from the return vent to the supply vent during a mechanical cooling mode. The sliding damper includes a vertical panel capable of moving vertically to close the intake vent and the exhaust vent during the mechanical cooling mode and an angled panel capable of closing the opening in the partition in order to enter an economizer mode.

Abstract: A temperature chamber in which a device is tested is connected to a temperature-controlled air source for controlling temperature of the chamber. The temperature chamber includes thermal insulation formed on side surfaces of the chamber. A universal manifold adaptor for directing the temperature-controlled air directly to a device being tested is connected to the chamber. The temperature chamber also includes an exhaust system. A self-closing cable feed-through module is connected to an outer surface of the chamber. The feed-through module includes a first portion and a second portion, wherein cables are fed through the first and second portions into the chamber in a first position and the first and second portions form a leak tight seal around the cables in a second position.

Abstract: An air conditioner is disclosed which includes a case including an external air inlet opening formed in a side of the case, a heat exchanger provided in the case, and a guide part which guides external air which enters the case through the external air inlet opening into an interior of the heat exchanger.

Abstract: A refrigerator including a housing with a chassis and a door enclosing a chilled interior; and a pressure equalization valve extending through a wall of the housing thereby facilitating an inflow of air from the surroundings into the interior and thereby blocking an outflow of air from the interior into the surroundings, the refrigerator comprising, a wall having a throughbore formed therein in a parallel flow arrangement with the pressure equalization valve, through which air can pass in two directions, wherein the flow of air is less than that of the airflow through the pressure equalization valve in the throughflow direction and greater than that of the air leakage value of the pressure equalization valve in the blocked direction.

Abstract: A method and a system for the preparation of compressed air having a heat exchanger (system heat exchanger) which is in communication with a pressure source on the inlet side on the compressed air side and which is in communication with a system or unit on the outlet side on the compressed air side which is to be supplied with cooled compressed air and including at least one heat exchanger (air conditioning system heat exchanger) which is in communication with a pressure source on the inlet side on the compressed air side and which is in communication with additional components of an aircraft air conditioning system on the outlet side on the compressed air side.

Abstract: To provide a quick freezing apparatus and method making it possible to prevent a subtle reaction between an object-to-be-preserved and a gas inside its freezing store to prevent deformation and deterioration of the object-to-be-preserved as much as possible and freeze-preserve the object maintaining its freshness and quality at a high standard for a long term, and thereby applicable to a long-term preservation of a living tissue. A quick freezing apparatus includes a freezing store 11 including a door for bringing in or taking out an object-to-be-frozen 3, a freezer 17 capable of lowering a temperature inside the freezing store to a temperature equal to or less than approximately ?30 degrees C., a pressure regulator 60 capable of adjusting a gas pressure inside the freezing store, and a ventilator 31 for sending cold air at a wind velocity of 1 to 5 m/sec toward the object-to-be-frozen placed inside the freezing store.

Abstract: A pressure equalization port for a refrigeration unit is provided. The port includes a conduit having a thermally conductive body. The conduit includes a first opening exposed to a refrigeration chamber enclosed within the refrigeration unit, and a second opening exposed to a space external to the refrigeration chamber. At least one heat-dissipating refrigerant flow coil surrounds a portion of the thermally conductive body to heat said body.

Abstract: A cooling system for removing heat from the layers of a three-dimensional object built in a layerwise manner from a build material in a solid freeform fabrication apparatus. The cooling system provides an air duct that delivers a uniform sheet of air flow over the layers of the three-dimensional object while it is built. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: Disclosed is a combined ventilating and air conditioning system, comprising: a first air duct for guiding outdoor air to the indoor spaces, the first air duct being capable of opening and closing; a second air duct for guiding indoor air to outdoors, wherein the second air duct is capable of opening and closing and installed in such a manner that part of the second air duct intersects with the first air duct; a third air duct for guiding the indoor air to the outdoors, the third air duct being capable of opening and closing; a regenerative heat exchanger, being provided in an intersection between the first and second air ducts, for exchanging heat between the indoor air and the outdoor air passing through the intersection; and blowing fans for controlling airflows, being provided in the first air duct, in the second air duct, and in the third air duct, respectively. The compressor mounted on the air conditioner is provided in the third air duct.

Abstract: A refrigerated, open-top food pan that can be used as a counter top buffet, as a store self-service display or as a kitchen food ingredient holder, has two cooling systems. The first one discharges a blast of cool air through the exit ports of an manifold peripherally mounted near the upper rim of the pan. The cooled air is generated by a bwer taking air from a grated port in the inner side wall and forcing it through a chamber housing a cooling expansion coil. A secondary cooling system has an expansion tube in intimate and circuitous contact with the bottom and side wall of the pan.

Abstract: To allow for easier opening of a refrigerator door, a pressure relief system is provided to relieve a pressure differential or vacuum that develops due to operation and use of the refrigerator. The pressure relief system includes a check valve having an orifice with a flexible membrane. An insulation portion of the pressure relief valve, which is foamed into the cabinet, spans from the fresh food compartment to a top of the cabinet and directs air towards the rear cabinet liner for moisture condensing measures. The pressure relief assembly also includes an adapter which mounts to the cabinet top and provides a mounting surface for an air return assembly.

Abstract: An air treatment system includes a housing that defines an interior cavity. The interior cavity has a supply-air flow path and a stale-air flow path. A HEPA filter is positioned along the supply-air flow path to filter supply air. A heat recovery core is positioned downstream from the HEPA filter along the supply-air flow path. The heat recovery core is positioned between the supply-air flow path and the stale-air flow path to exchange heat between the supply air and stale air. An evaporator is positioned downstream from the heat recovery core along the supply-air flow path to remove heat from the supply air. An ultraviolet light is positioned downstream from the evaporator along the supply-air flow path to irradiate the supply air with ultraviolet light. A condenser is positioned downstream from the ultraviolet light to reintroduce the heat removed from the supply air by the evaporator.

Abstract: An air treatment system includes a housing that defines an interior cavity. The interior cavity has a supply-air flow path and a stale-air flow path. A HEPA filter is positioned along the supply-air flow path to filter supply air. A heat recovery core is positioned downstream from the HEPA filter along the supply-air flow path. The heat recovery core is positioned between the supply-air flow path and the stale-air flow path to exchange heat between the supply air and stale air. An evaporator is positioned downstream from the heat recovery core along the supply-air flow path to remove heat from the supply air. An ultraviolet light is positioned downstream from the evaporator along the supply-air flow path to irradiate the supply air with ultraviolet light. A condenser is positioned downstream from the ultraviolet light to reintroduce the heat removed from the supply air by the evaporator.

Abstract: A room air conditioner of the type having a partition dividing indoor and outdoor sections is provided with vent and exhaust openings for exhausting air into the outdoor section and for venting outdoor air into the indoor section. A combination vent and exhaust door is mounted on the partition in the outdoor section. The combination vent and exhaust door is configured to be selectively operable to a first position wherein the vent opening is closed and the exhaust opening is open, a second position wherein both the vent opening and the exhaust opening are closed and a third position wherein the vent opening is open and the exhaust opening is closed. An actuator mechanism is mechanically linked to the combination door for selectively operating the door to each of the three positions.

Abstract: Methods and apparatus for pressure equalization port devices, which are particularly suited for preventing vacuum seals in ultra low freezers are disclosed. An application of the pressure equalization port method and apparatus to ultra low freezers is also disclosed.

Abstract: A pressure relief port has a tubular housing 11 in which a hollow valve body 12 is mounted. An upper poppet valve 23 is operatively mounted to the top of the valve body and a lower poppet valve 25 is operatively mounted to the bottom of the valve body. The interior of the valve body communicates with one end of the tubular housing through the upper poppet valve while the exterior communicates with the other end of the tubular housing through the lower poppet valve.

Abstract: A fan casing of window type air conditioner adapted to smoothen and form corners of outdoor casing in slow curvatures having convex and concave surfaces and to lengthen draft holes, thereby increasing amount of sucked air, reducing disturbance and resistance of air flow to decrease eddy current phenomenon and noises, and obtaining a broader accommodation spaces of compressor and the like on the concave surfaces, the fan casing comprising: convex surfaces formed facing the outdoor fan for increasing a suction amount of external air and simultaneously minimizing disturbance and reduction of air flow by increasing the length of the plurality of draft holes; and concave surfaces formed facing the condenser for obtaining a broaden accommodation space of the compressor and the like at a predetermined position at the convex surfaces and securing a larger suction area of external air.

Abstract: An air conditioning unit comprising: a housing having a first half and a second half; the first half of the housing containing an indoor heat exchange coil and a blower moving air through said coil from at least a housing inlet to a housing outlet. The blower discharges into a diffuser duct having a diffuser section with a first segment and a second segment where the first and second segments have first and second respective and differing angles of diffusion.

Abstract: A blowoff orifice is constituted by an upper wall, a lower wall and a vertical wind deflecting plate. The upper wall inclines so that a flow passage becomes narrow toward downstream and provided with a protrusion at its end portion. The lower wall has a horizontal linear portion on the downstream side and an end portion forming an acute angle at the tip of the linear portion. The vertical wind deflecting plate is provided between the upper wall and the lower wall, and capable of changing an airflow from a horizontal direction to a downward direction. The upper wall protrusion is located more downstream than the lower wall end portion.

Abstract: An integrated air conditioner is provided which realizes an improvement in the indoor- and outdoor-side ventilating circuits, an enhancement in air quantity performance, a reduction in noise, an enhancement in heat exchanging ability, compacting, and simplification in an installing operation. The integrated air conditioner has an indoor-side ventilating circuit (4) which is constituted by an indoor-side heat exchanger (5), two indoor-side air blowers (6) with centrifugal fans, an indoor-side suction port (2), and an indoor-side blowoff port (3); an outdoor-side ventilating circuit (9) which is constituted by an outdoor-side heat exchanger (10), an outdoor-side air blower (6) with an axial-flow fan, an outdoor-side suction port (7), and an outdoor-side blowoff port (8); ducts for leading the indoor-side suction port (2) and the indoor-side blowoff port (3) to an indoor side; and a compressor (12).

Abstract: An air conditioner includes an air inlet, an air outlet, a heat exchanger, and a suction source for sucking-in air through the inlet and then discharging the air through the outlet after passing the air across the heat exchanger. Vanes are provided for opening and closing the inlet. A drive mechanism rotates the vanes about respective horizontal axes such that the vanes become opened by progressively greater amounts in a direction away form the suction source to expose progressively larger areas of the air inlet. This achieves a substantially uniform rate of air flow throughout the height of the air inlet.

Abstract: A refrigerator having a defrostable evaporator disposed in a food storage compartment wherein a drain system is provided for disposing of the defrost water dripping from the evaporator during a defrost operation. The drain system includes a drip tray disposed within the food storage compartment below the evaporator and an evaporator pan mounted below the food storage compartment. A drain tube is provided having a first end positioned below the drip tray for receiving the defrost water and having a second end positioned over the evaporator pan such that the drain tube drains the defrost water from the drip tray into the evaporator pan. The drain tube further includes a drain trap portion and a vent disposed upstream of the drain trap portion. The vent includes a valve for allowing air flow into the drain tube for equalizing the air pressure in the food storage compartment with the ambient air pressure but prevents air flow out of the drain tube such that no thermal leakage occurs through the drain tube.

Abstract: A compartment ventilating apparatus prevents its indoor louver (22) from being subjected to the formation of dew, and, therefore can prevent the dew built up in its ventilation area in the form of ice, which enables the apparatus to keep a sufficient ventilation area in operation. In the apparatus, an opening portion (3 ) passes through a side wall (2) of a compartment (1). Mounted in the opening portion, (3) are an inner ventilation unit (4) and an outer ventilation unit (5) which is spaced apart from the inner ventilation unit (4).

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 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: This invention relates to a method of precooling precooled materials such as fruits and vegetables under vacuum, and keeping it in a precooled state for a long time, and to a refrigerating container therefor. Precooling and keeping the precooled state for a long time have been regarded as impossible in the past, but these problems are resolved in this invention even for materials closely stored in the container. This container is formed with ventilating communication conduits of a desired length for providing communication between the inside and outside of the container when the container is closed. As a result, the materials such as the fruits and vegetables can be transported a long distance and stored for a long time with an increased reliability of freshness, yet without deteriorating precooling effects.

Abstract: A cooling arrangement for use in continuously keeping cool edible substances, such as foodstuffs and/or beverages, while being transported in a motor vehicle having an outside air ventilation system and an air conditioning system, includes a cooling box bounding an internal space for accommodating the edible substances and having an air inlet and an air outlet situated across the internal space from one another; and a cooling system including a first and a second inlet respectively connected to the ventilation system and to the air conditioning system of the motor vehicle, an outlet connected to the air inlet of the cooling box, and a three-port valve device interposed between the inlets and the outlet of the cooling system and operative for selectively connecting the first and second inlets with the outlet of the cooling system and for controlling the amount of air flowing through the outlet of the cooling system and then past the edible substances accommodated in the cooling box to be discharged through the

Abstract: A door jamb for a cold storage room is provided with a tranverse passage for passage of air from the exterior into the interior of the cold storage room. A thin metal flap valve, specifically of stainless steel, is placed at the exterior end of the passage, seated on a flat plate. An electric heater in the passage prevents the valve from being immobilized in the closed position due to frozen condensation.

Abstract: A vent assembly for use in an air conditioning unit is disclosed. The vent assembly extends from the condenser fan shroud to the partition for directing air at a relatively higher condenser fan pressure through the vent assembly to the indoor section wherein the evaporator fan circulates the air to the indoor section to be conditioned. The vent assembly is an integral self-contained portion capable of being easily inserted within an existing unit for effecting desired airflow control.

Abstract: An exhaust vent for cooling rigs transported on vehicles the interior of which is cooled by the introduction of low boiling gas includes inserts in front or behind the exhaust vent to force the outflowing gas to be deflected several times.

Abstract: An economizer system for air conditioning uses a space thermostat to determine a demand for cooling and an outside air controller to determine whether cooling shall be mechanical or natural. A mixed air controller senses the temperature of the mixture of outside air and recirculated air and adjusts the relative proportions as desired by means of a controlled bidirectional damper, moving at a rate far less than the response time of the mixed air controller. This slow bidirectional damper movement in response to the mixed air control sensors causes the dampers to modulate in an inexpensive and reliable manner.