Abstract: A transport refrigeration unit having a front grille supported by a frame and being composed of a rigid material that is subject to cracking because of vibrations being transmitted from the frame, there is provided a relatively flexible support structure surrounding the grille and supporting it in the manner which allows for the damping of vibrations so as to prevent them from reaching the grille. The flexible material is preferably a thermoplastic olefin. The manner in which the supporting structure is attached to the frame and in which the grille is attached to the supporting structure also described.

Abstract: A dehumidifier includes an air flow path with first, second and third segments in series from upstream to downstream and passing ambient air respectively to an evaporator coil then to a condenser coil and then discharging same. The air flow path has a fourth segment passing ambient air to the condenser coil in parallel with the noted second air flow path segment. A bypass door is configured to selectively block air flow along the fourth segment and allow air flow along the fourth segment.

Abstract: Disclosed herein are a refrigerator capable of preventing frost from forming on an evaporator by mounting a dehumidifying unit and a recycling unit on both sides of the evaporator, respectively, and a controlling method thereof. Cold air in a storage chamber is dehumidified as the air passes through the dehumidifying unit and is sent to the evaporator. The cold air thermally exchanged in the evaporator is humidified as the air passes through the recycling unit and is sent to the storage chamber.

Abstract: A control device of a blower and air conditioner module a for motor vehicle is disclosed with a blower controller and an air conditioner controller, which governs the refrigerating plant with a refrigerant condenser, as well as flaps and valves of the blower and air conditioner module, and processes information from sensors and a man-machine interface, with the blower controller and the air conditioner controller, together with a blower motor controller of a blower motor designed as a central control device and it is placed on the blower motor.

Abstract: The present invention relates to a door duct assembly for a refrigerator. In the present invention, the cold air delivered from a cold air duct of a refrigerator main body to a door 30 through a cold air communication portion 55 is discharged into a storage space through cold air vents 61 formed in a flow guide 60. The cold air communication portion 55 is formed in a door basket 40 or the flow guide 60. The door baskets 40 or the flow guide 60 is mounted on a door liner 33 defining a rear surface of the door 30. According to the present invention, there are advantages in that it is relatively easy to manufacture a door, the cold air flows uniformly in the door, the strength of the flow guide for defining a flow channel in the door is relatively increased, and dewdrops are prevented from being formed upstream of the flow channel.

Abstract: Provided is an air conditioner for a vehicle, including a blower unit that blows air, an air conditioning case including an evaporator and a heater core, which are sequentially disposed in an airflow path, and an air inlet path that allows air to flow to an evaporator from the blower unit, wherein the airflow path includes a first path that allows air entered from the air inlet path to flow to a lower part of the evaporator and second and third paths that allow the air to flow to the lower part of the evaporator after passing through both sides of the evaporator. The air conditioner increases an amount of airflow and reduces airflow resistance since airflow paths are formed on both sides of the evaporator in addition to a direction perpendicular to the separator. Consequently, the airflow entering a lower part of the evaporator can be uniformly distributed.

Abstract: An air flap device (10) for a cooling or/and freezing appliance of kitchen equipment comprises an air flap (18) which is mounted so that it can pivot about a first axis of rotation (20) between an open position and a closed position, uncovers an air passage opening for the passage of air in the open position and at least substantially blocks the air passage opening against the passage of air in the closed position, and a motor-driven flap operating mechanism for pivoting the air flap. According to the invention, the flap operating mechanism comprises a rotary member (26) which is disposed so as to be driven about a second axis of rotation (28) as well as a separate force transmission member (32) which serves to transmit force between the rotary member and the air flap, is coupled to the rotary member at a point lying eccentrically to the second axis of rotation and is coupled to the air flap (18) at a point lying at a distance from the first axis of rotation.

Abstract: An air conditioner is disclosed which includes a case having one or more air intake portions, a heat exchanger inside the case, a fan in a vicinity of the heat exchanger, and an intake amount reducing member at one of the air intake portions that reduces an intake amount of introduced air.

Abstract: The invention relates to a power station comprising a condenser installation (2) for the condensation of water vapour, said condenser installation being mounted on a supporting structure (8) and comprising heat exchanger elements (5) past which cooling air flows from below. The condenser installation (2) is arranged in such a way that a longitudinal side thereof is directly adjacent to a building structure of the power station (1). A turbine house (3) comprises at least one wind passage (6) through which cooling air flows and/or is sucked beneath the heat exchanger elements (5).

Abstract: An air conditioner includes an air conditioning module and a wireless access module. The air conditioning module has at least one blade for controlling the wind direction of the air conditioning module. The wireless access module has at least one antenna. The antenna is disposed on the blade.

Abstract: A body armor cooling system for law enforcement officers having a hook-shaped nozzle attached to one end of a flexible hose member and a bellows assembly attached to the other end of the flexible hose member. The end of the hook-shaped nozzle is tucked beneath the protective armor that the law enforcement officer is wearing in order to provide a cooling effect. The bellows assembly is connected to the air conditioner vent opening on the dash of the vehicle. The bellows assembly makes an air tight seal with the dash of the vehicle and it can be easily attached and detached.

Abstract: A refrigerator including a blowing unit optimized for a bottom type condenser. The refrigerator includes a main body having a storage compartment defined therein, a condenser mounted at the bottom of the main body, and a blowing unit to blow air that has already passed through the condenser. The blowing unit includes a centrifugal fan mounted in a machine compartment and a blowing guide member to guide air blown by the centrifugal fan to the front of the main body. Consequently, it is possible to discharge the air that has already passed through the bottom type condenser, to the front of the main body, thereby accomplishing the smooth discharge of air and reducing the power consumption necessary to blow the air.

Abstract: A cryogenic refrigerator comprising a rotary valve which controls the flow of high pressure gas into the refrigerator and the return of the gas from the refrigerator, the cryogenic refrigerator further comprising rotary fluid motor arranged to drive the rotary valve.

Abstract: The invention relates to an air-conditioning system with a redundant feed of supply air comprising at least one pack which is supplied with air, with at least one valve being arranged in the feed for the air flow control. In accordance with the invention, an electrical flow control valve and a pneumatic flow control valve are arranged in parallel connection in front of the pack for the air flow control.

Abstract: There is disclosed a cooling device capable of simplifying attachment of a blower for a condenser and a structure of a drain path from an evaporator, and the cooling device includes a condenser constituting a part of a refrigerant circuit, a condenser blower which air-cools this condenser, and a fan casing attached to the condenser and provided with the condenser blower. The fan casing is integrally provided with a bracket part for attaching a motor of the condenser blower.

Abstract: The present invention discloses a cool air supply structure for a refrigerator, including an inner casing defining a storage space in the refrigerator, a cool air discharge hole formed at the inner casing, and a passage member provided at the rear face of the inner casing, for forming a cool air passage and communicating with the cool air discharge hole, or including a passage provided at a rear face of an inner casing defining a storage space in the refrigerator, the cool air to be supplied to the storage space flowing in the passage, and at least one cool air discharge hole formed at the front face of the inner casing, and operated as an outlet for discharging the cool air flowing in the passage. As a result, the flow of the cool air can be facilitated by the simple configuration.

Abstract: A damper device may include a frame, a baffle turnably supported on the frame for opening and closing a passage through which fluid is passed, and a drive unit for turnably driving the baffle. The drive unit may include an output member whose tip end side structures a slide mechanism together with the baffle, and a driving part which causes the output member to linearly advance and retreat to and from the baffle. The slide mechanism includes a groove formed in one of a tip end side of the output member and the baffle so that the groove is extended to move the baffle, and a slider part provided in the other so that the slider part is fitted into the groove, and the groove is formed in which at least one of both end portions of the groove is formed in an open end.

Abstract: An air conditioning system is provided that includes first and second turbines and a compressor. The second turbine is in fluid communication with a pack outlet. A passage fluidly connects the first turbine and the pack outlet. A valve is associated with the passages and is movable between open and closed positions. In the open position, the valve permits flow through the passageway from the first turbine directly to the pack outlet thereby bypassing the second turbine and reducing the resistance to the flow through the system. The valve is opened at higher altitudes to change the typical series fluid connection between the turbines to a parallel fluid connection. In this configuration, the air conditioning system operates more efficiently using reduced air pressure provided to the system. Another valve is also opened to permit additional reduction in the air pressure required.

Abstract: The invention relates to a diaphragm (1) for throttling a volume flow in an air distribution ducting system of an air-conditioning unit of a commercial aircraft. The diaphragm includes a plurality of spring-elastic elements (10) that effect a throttling of the volume flow through the diaphragm (1). The invention also relates to the use of such a diaphragm (1) for installation in an air distribution ducting system of an air-conditioning unit on board a commercial aircraft.

Abstract: Disclosed related to a co-generation according to the present invention comprising an electric generator, an engine, a waste heat recovery heat exchanger where the waste heat of the engine is recovered, a water boil heat exchanger connected with the waste heat recovery heat exchanger and the heat transfer path, a hot water storage tank connected with the water boil heat exchanger and the water circulation path, a water boil heat exchanger bypassing path formed at the water circulation path, a water boil heat exchanger bypassing valve installed at the water boil heat exchanger bypassing path.

Abstract: A device for freezing and/or refrigerating articles, in which at least one cold gas generating device is provided in a refrigeration room and at least one fan is provided for distributing the cold gas in the refrigeration room. The fan is connected to a drive motor. In order not to damage the drive motor when cleaning the refrigeration room, the drive motor is accommodated in a motor room which is separate from the refrigeration room.

Abstract: The invention provides an improved air chiller unit mounted on an aircraft for sending cooled air to service carts for serving meals. An air chiller unit is equipped with a refrigeration cycle unit disposed on a casing. The refrigeration cycle unit is equipped with a compressor, a condenser, an evaporator and so on for a refrigerant, and the cooled air is sent via a blower device 60 to a galley etc. A housing 630 of the blower device 60 has an inlet and two outlets 650, 652 for cooled air. A duct member is inserted to one of the two outlets 650 and 652, and the other outlet is sealed. The casing 10 is formed of a honeycomb panel. Since the honeycomb panel has high flexural rigidity, the base plate can support the refrigeration cycle unit by itself. Further, since the panel has superior heat insulating property, the air cooling efficiency can be improved.

Abstract: A refrigeration system including a direct expansion evaporator with a substantially vertical header through which a fluid mixture of a refrigerant and oil is pumped, a compressor for compressing the refrigerant, and a suction tube in fluid communication with the header and the compressor through which a stream of a first fluid mixture is drawn substantially in a first direction from the header by the compressor. The first fluid mixture exerts a first fluid pressure in a second direction substantially opposite to the first direction. A second fluid mixture is located in the header and subject to a second fluid pressure substantially greater than the first fluid pressure to create a pressure differential. The system also includes an extraction apparatus with a passage subject to the pressure differential, through which passage the second fluid mixture is drawn into the suction tube.

Abstract: An operational air conditioning mode is allowed to set to a temperature uniformization mode and a spot air conditioning mode, and is selectively switched between these modes automatically by a control means (53) or manually. In such an embodiment, a comfortably air-conditioned state is obtained in all the areas of a space to be air-conditioned W during air conditioning performed in the temperature uniformization mode, and the comfort is ensured by intensively air-conditioning the surroundings of a person during air conditioning performed in the spot air conditioning mode. At the same time, since an unnecessary air conditioning is not provided to a region without the presence of a person, energy conservation is improved, for example, and thus the comfort of air conditioning and energy conservation are both achieved.

Abstract: A refrigerating appliance includes a heat insulating housing and an inner chamber that is cooled by the circulation of cooling air. A hollow body extends in the inner chamber, defining a flow channel for the cooling air. Carriers for goods to be cooled are disposed in the inner chamber and are supported on the hollow body.

Abstract: A venting arrangement for a vehicle refrigerator including a lower vent assembly and an upper vent assembly. The lower vent assembly provides ventilation intake for cooling of refrigeration components. The upper vent assembly provides ventilation exhaust for cooling of refrigeration components. The venting arrangement further includes a flue exhaust tube assembly. The flue exhaust tube assembly causes the combustion exhaust gases to mix with the ventilation air prior to being exhausted near the upper vent assembly and away from the refrigerator components.

Abstract: Disclosed is air conditioner having an indoor part and an outdoor part as one unit. The air conditioner including: an indoor part for inhaling an indoor air to exchange heat with the inhaled air through an indoor heat exchanger, and again discharging the heat-exchanged air into an indoor space; an outdoor part for inhaling an outdoor air to exchange heat with the inhaled air through an outdoor heat exchanger, and again discharging the heat-exchanged air into an outdoor space; a base having parts constituting the indoor part and the outdoor part installed thereon; and a barrier integrated with the base, for partitioning an upper space of the base into the indoor part and the outdoor part.

Abstract: A cool air supplying apparatus of a refrigerator comprises a guide passage formed at a rear wall of a refrigerating chamber and provided with a plurality of discharge ports towards the refrigerating chamber for guiding cool air to a rear side of the refrigerating chamber, and a direction control unit installed at the guide passage for selectively opening and closing the discharge ports in order to control a discharge direction of cool air discharged into the refrigerating chamber.

Abstract: An article (e.g. a semiconductor wafer) is held in an article holder by means of a number of gas flows emitted from gas vortex chambers. Some of the gas flows act to cool an adjacent article portion more than the other gas flows. For example, some of the vortex chambers emit more gas per unit of time than the other chambers. More cooling is provided to those portions of the article which are heated more during processing. Greater temperature uniformity can be achieved.

Abstract: The present invention discloses a built-in type outdoor unit for an air conditioner which can prevent re-suction of discharged air increased in a front suction/discharge type, by using an air isolating means.

Abstract: Disclosed is an air conditioner enabling to supply a room with oxygen as well as control temperature and humidity of air therein. The present invention includes an outdoor module 10, an indoor module 20, a refrigerant tube 30, and an oxygen generating module. The outdoor module 10 includes a condenser 11, an outdoor fan 12, and a compressor 13 so as to compress and condense a refrigerant. The indoor module 20 includes an evaporator 21, an indoor fan 22, an inlet 23, and an outlet 24 so as to cool the air in the room. The refrigerant tube 30 connects the evaporator 21 of the indoor module 20 to the condenser 11 of the outdoor module 10 so as to circulate the refrigerant.

Abstract: A heating, ventilating and air conditioning system providing enhanced protection from environmental contaminants such as chemical, biological or radioactive contaminants by maintaining a positive pressure inside the evaporator compartment thereby reducing the possibility of contaminant entry from the lower pressure ambient environment. The system also increases air flow over the evaporator coil by using a radial fan that provides an improved and efficient diffused air flow over the evaporator coil and enables use of a smaller and lighter evaporator compartment.

Abstract: An air-cooling device comprises compressor (1). Double cavity heat exchanger (2), turbo expander (6) and the freezing chamber (3) containing fan (5) and air cooler (4). Fan (7) is mounted on the same shaft with the turbo expander (6). The first cavities of the heat exchangers (9 and 2), moist separator (8) and the second cavity of the heat exchanger (2) are connected with the compressor (1) input in sequence. In the other appearance the device comprises compressor (44) and turbo expander (49), double cavity heat exchanger (45), freezing chamber (46) containing fan (48) and air cooler (47), double cavity vaporization heat exchanger (51) and moist separator (50). The first cavities of the vaporization heat exchangers (51 and 45), moist separator (50, turbo expander (49), air cooler (47) and the second cavity of the heat exchanger (45) are in sequence connected with the compressor input (44).

Abstract: An air conditioning system includes an air conditioner for blowing conditioned air toward a compartment of a vehicle, and a dashboard having a design surface exposed to the compartment. An inner air passage extending nearly parallel to the design surface is formed in the dashboard, and a plurality of diffusion blowing openings are formed in the design surface. Thus, the condensed air is blown from the diffusion blowing openings into the compartment of the vehicle, while passing through the inner air passage. For example, cool air is blown from the diffusion blowing openings, so that the cool air can cool the dashboard while cooling the compartment of the vehicle. Moreover, because the cool air passes through the inner air passage extending nearly parallel to the design surface, the dashboard can be effectively cooled.

Abstract: A computer room reduced air flow method and apparatus is provided which utilizes an increased delta T to reduce the required air quantity required from an air conditioning system, thus resulting in a reduced air flow capability. Specifically, the present invention utilizes an approximately 40° delta T to reduce the CFM requirements by substantially 50% so as to correspondingly reduce the required power for the fan by approximately 50% so as to result in substantial energy savings. The present invention serves to communicate cooling air from a cooling apparatus into an air passageway, guiding the cooling air within the air passageway into the equipment assembly and introducing the air released from the equipment into either a plenum for communicating such released air to the cooling apparatus or introducing the air released from the equipment into the room in which the equipment and/or cooling apparatus are located.

Abstract: An environmentally controlled sleeper area of a vehicle that is contained within a bunk area (that is in turn adjacent to a cab area of the vehicle). The bunk area has an end wall and a pair of side walls extending generally perpendicular to the end wall. The side walls and the end wall encompass or surround three sides of a bed. Along the remaining open side of the bed, the vehicle operator can maneuver in and out of the bed. An extendible and retractable thermal barrier is provided along the remaining open side of the bed. The thermal barrier rises above the top surface of the bed and thermally separates the sleeping area from a remainder of the bunk area.

Abstract: The invention concerns the installation of a double-flow ventilation system with a ventilation unit blowing air drawn from outside the building into the living quarters: drawing-rooms, bedrooms of various housing units, and a ventilation unit (5), having the same characteristics as the blowing unit, extracting air from the functional quarters: kitchens, bathrooms blown air from the functional quarters, air supply and air extraction at each housing unit being carried out through ducts common to the entire building. Said installation further comprises at the connection to each housing unit to a pair of ducts (6, 7) respectively for blowing and for extracting air an individual thermodynamic unit (8) specific to the housing unit concerned and whereon passes the stream on ventilating air, the evaporator and the condenser of said unit being arranged respectively on one of the two air blowing and air extracting fluxes.

Abstract: An air conditioning cooling apparatus and method which includes the steps of supplying cooling air generated from a cooling apparatus into an air passageway formed below a floor; guiding the cooling air in a controlled manner within the air passageway into an equipment assembly disposed on the floor through an opening located in the floor; communicating the cooling air introduced into the equipment assembly in a controlled manner into a plenum and introducing the air released from within the equipment into the plenum and communicating the released air through the cooling apparatus for cooling the released air. The method can permit temperature differential between the air supplied to the air passageway and the air introduced into the plenum from the equipment assembly to be 45° F. to substantially 40° F. so as to reduce the power necessary for operating on the fan of the blowing apparatus, and can also permit a controlled, uniform flow of air to and from the equipment in the equipment assembly.

Abstract: This invention relates to refrigerating or air conditioning system comprising at least one exchanger (2, 3) The system uses a refrigerant fluid according to a thermodynamic cycle comprising at least one liquid-vapor expansion phase. According to the invention, the liquid-vapor expansion phase is created by means of a diphasic turbine (4b) that actuates a ventilator (5b), causing air to circulate on said exchanger (3).

Abstract: In an air conditioning apparatus, an air conditioning case has an upstream portion defining an air intake port through which air flows into the upstream portion substantially parallel to a core surface of a heat exchanger. The air intake port has a vertical dimension H1 that is smaller than a vertical dimension H2 of the core surface. The upstream portion has an air flow direction changing portion protruding inside of the upstream portion at a position opposite to the core surface above the air intake port. The air flow direction changing portion defines a clearance between the core surface and itself. A part of the air turned upward and further turned substantially parallel to the core surface strikes the air flow direction changing portion and flows toward the core surface through the clearance.

Abstract: A humid gas stream is dehumidified by bringing that stream into contact with the front surface of a hydrophilic capillary condenser layer that captures the water and moves it adjacent the rear surface of the capillary layer. An osmotic layer, such as a semi-permeable membrane, is disposed on the rear surface of the condenser layer, and an osmotic fluid having a low concentration of water therein, is disposed adjacent the osmotic layer. An osmotic driving force, resulting from the water concentration gradient across the osmotic layer, transports the condensed water from the condensing layer through the thickness of the osmotic layer and into an osmotic fluid. The osmotic layer also inhibits the osmotic fluid from flowing into the condenser layer.

Abstract: An air-cooling device comprises compressor (1). Double cavity heat exchanger (2), turbo expander (6) and the freezing chamber (3) containing fan (5) and air cooler (4). Fan (7) is mounted on the same shaft with the turbo expander (6). The first cavities of the heat exchangers (9 and 2), moist separator (8) and the second cavity of the heat exchanger (2) are connected with the compressor (1) input in sequence. In the other appearance the device comprises compressor (44) and turbo expander (49), double cavity heat exchanger (45), freezing chamber (46) containing fan (48) and air cooler (47), double cavity vaporization heat exchanger (51) and moist separator (50). The first cavities of the vaporization heat exchangers (51 and 45), moist separator (50, turbo expander (49), air cooler (47) and the second cavity of the heat exchanger (45) are in sequence connected with the compressor input (44).

Abstract: A cooling fan system for a vehicle with fuel cell propulsion, wherein air is moved by means of a cooling fan for cooling purposes through a heat exchanger and can thereafter be supplied to the environmental air either directly or indirectly after satisfying one or more further cooling tasks, characterized in that an air branching device is provided which supplies at least a part of the air delivered by each fan to a duct and thereby enables the use of the branched-off air for the starting of the fuel cells and/or for the maintenance of the operation of the fuel cells.

Abstract: A removable modular duct system for conducting air in a temperature-controlled cargo container. Temperature-controlled air produced and propelled by a refrigeration unit, is conducted along the modular duct system by one or more duct sections and a transition section that conducts air from the refrigeration unit to the duct sections. The air may be discharged laterally via lateral discharge openings in the duct sections. An end section may be coupled to the duct sections to discharge air at the end of the duct system.

Abstract: In the method and apparatus of this invention a wafer for manufacturing semiconductor devices is held by a vortex-type substrate holder against a moveable frame during processing. Motion of the wafer is controlled with movement of the frame. The frame is shaped to provide a sealed chamber through which gas that is used to create the vortices is also re-captured. With such sealed chamber a higher heat conducting but more expensive gas can be recycled and used for the vortex holder and cooling of the wafer. In another technique of this invention, damage of the wafer edges from impacts with position limiters is avoided by inserting a small physical off-set of the center of mass of the wafer relative to that of the frame used to rotate the wafer. This prevents sliding of the wafer within the holder. In another feature of the invention end effects during treatment of the wafer are avoided by providing an extension around the wafer.

Abstract: In an exemplary configuration, an air container is placed in a vacant portion of a structure and substantially prevents convection between an air mass in that portion and an adjacent air mass of an occupied portion of the structure. By thus isolating the air masses, the air container restricts heat transfer between them and advantageously allows the occupied portion's air mass to heat up and cool down without requiring substantial heating and cooling (at least initially) of the vacant portion's air mass. Other methods and structures with different advantageous features are also described.

Abstract: A heating, ventilation, and air conditioning system for a vehicle including a front HVAC control system that communicates with a rear HVAC control system. The rear HVAC control system includes a control panel having mode, temperature, and blower speed controls. The front HVAC control system includes a control panel having a rear manual control switch for enabling/disabling manual control of the rear HVAC system via the rear HVAC control panel. A microprocessor communicates control information from the front HVAC control system to the rear HVAC control system regardless of the position of the rear manual control switch. Whether the supplied control information is used by the rear HVAC control system is determined by the rear manual switch.

Abstract: A power element portion 36′ mounted on the upper portion of an expansion valve body comprises an upper cover 36d and a lower cover 36h, and is divided into an upper pressure chamber 36b and a lower pressure chamber 36c by a diaphragm 36a. A heat sensing drive shaft 101 is formed of a large radius portion 105 and a heat conducting shaft 103 integrally formed thereto. The stopper portion 104 contacting the lower surface of the diaphragm 36a is a member which is formed separately from the heat sensing drive shaft 101, and supported within the lower cover 36h. When the expansion valve is taken apart, the heat sensing drive shaft 101 is pulled out from the inside of the mounting seat 362 of the power element portion 36′, and the refrigerant remaining inside the upper pressure chamber 36b is taken out and collected from the side of the diaphragm.

Abstract: A heat-source-side space and two heat-use-side spaces are formed in a casing. A heat-source-side heat exchanger is contained in the heat-source-side space, and heat-use-side heat exchangers are individually contained in the heat-use-side spaces. The casing is formed with a plurality of suction ports for room air and a plurality of delivery ports for conditioned air. The suction ports and the delivery ports are individually connected to ducts communicating with rooms. The heat-source-side heat exchanger and the plurality of heat-use-side heat exchangers constitute refrigerant circuitry.

Abstract: A motor 51 is attached on the bottom surface side of a motor base 52 with a pinion gear 54 and an output gear 55 housed in a gear housing portion 521 thereof, and an output shaft 553 of the output gear 55 is inserted through a side plate 25L of an air outlet and is coupled to a flap 30 while the output shaft 553 is supported by a bearing hole 526 formed on the bottom portion of the motor base 52, and by a burring hole 251 formed at the side plate 25L. Therefore, the configuration of a flap driving means is simplified, the size is reduced, and the backlash of driving gears is controlled to smoothly drive the flap without rattling.