Abstract: An air mover system for use in an indoor unit of a heating, ventilation, and air conditioning (HVAC) system includes a blower comprising a motor and a blower control unit configured to control operations of the motor. The blower control unit includes a controller and a sensor communicably coupled to the controller. The sensor is configured to sense air inside the indoor unit and to provide sensor information to the controller. The controller is configured to determine whether a refrigerant is present in the air based on the sensor information and to control the blower to move the air out of the indoor unit in response to determining that the refrigerant is present in the air.

Abstract: A combined ventilation and microwave oven system includes an external enclosure with a top portion defining recirculation vent outlets, a cooling air inlet, a cooling air outlet, and an outside vent outlet, first and second side portions, and a bottom portion defining a vent inlet. The vent inlet is connected with the recirculation vent outlets and the outside vent outlet via airflow pathways. A hood assembly is disposed within the external enclosure and includes a first hood fan disposed between the cooking cavity and the first side portion and a second hood fan disposed between the cooking cavity and the second side portion. The hood assembly is configured to direct air through the vent inlet and through an interior of the external enclosure. A cooling fan is disposed between the cooking cavity and the second side portion to direct air through the cooling air inlet and the cooling air outlet.

Abstract: A charger for an electrical device (e.g., site light) includes a housing defining an interior cavity, and one or more openings formed in the housing. The one or more openings fluidly communicate the interior cavity with an exterior of the charger. A heat sink is at least partially disposed in the housing and operable to dissipate heat produced in the housing. A first portion of the heat sink is positioned within the interior cavity. A second portion of the heat sink is positioned in the one or more openings such that the heat sink is at least partially exposed to the exterior. The heat sink is in heat transfer relationship with components of charger electronics of the charger.

Abstract: A radiation element for radiating a microwave into the heating chamber at least one hollow dielectric member in which a gas is sealed, the hollow dielectric member having electrodes and a control unit having a plasma control unit for controlling the state of the hollow dielectric member and a current adjustment unit for adjusting a current to be applied to the electrodes of the hollow dielectric member under the control of the plasma control unit, the current adjustment unit being connected to the electrodes; and wherein the plasma control unit controls the state of the hollow dielectric member to put into one of states of: a plasma state in which the microwave is reflected by the gas; a plasma state in which the microwave is absorbed by the gas; and a gas state in which the microwave is allowed to be transmitted through the gas.

Abstract: A door assembly for a microwave appliance includes a door frame that defines a door plenum and an air inlet. A monitor cradle is positioned toward a front of the door frame for receiving an image monitor seated on top of or flush with a front of the door frame. A duct is mounted to the door frame to divide the plenum into a low pressure region and a high pressure region, and an air handler urges a flow of air through the door plenum. A trim piece is removably mounted to a top of the door frame and includes a front guide that is spaced apart from the image monitor to define an upper outlet through which the flow of air passes downward along the vertical direction in front of the image monitor.

Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to receive operational data from a measuring device indicative of the measured power of microwaves transmitted from the magnetron and receive operational data from the measuring device indicative of the measured anode current of the magnetron. A calculating device calculates an efficiency of the magnetron as a function of the measured power of the transmitted microwaves and the measured anode current, to define a determined efficiency. The control unit controls the cooling unit and cools the magnetron based on the determined efficiency.

Abstract: A heating cooking apparatus includes a heating cooking chamber (100A) and a first air sending unit (14). The heating cooking chamber (100A) includes an accommodation space (120) that accommodates an object to be heated, and a first space (130) that communicates with the accommodation space (120). The first air sending unit (14) includes a first partitioning member (14B) positioned between the first space (130) and a first air sending chamber (14A), a first suction hole portion (14D) disposed in the first partitioning member (14B) and configured to suction air inside the heating cooking chamber (100A), and a first blow-out hole portion (14C) disposed in the first partitioning member (14B) and configured to blow air into the heating cooking chamber (100A). The accommodation space (120) is a space that can accommodate the object to be heated and has a predetermined capacity. The first space (130) indicates a space into which the object to be heated is prohibited from entering.

Abstract: Food cooking unit composed of gas burners (1), regulation electrovalves (3) of the supplied gas; an infrared sensor (5) focused towards the cooking zone; a thermocouple (6) in thermal contact with the flames and in connection with a safety electrovalve (4) through a relay (10) and an electronic control device (7) connected to said infrared sensor (5), to said at least one regulating electrovalve (3) and the relay (10) and that stores different regulation programs and that regulates the regulating electrovalve (3) and/or interrupts the thermocouple connection with the safety electrovalve in response to the signals obtained from the infrared sensor (5) and/or the thermocouple (6), and issues warnings in response to signals from the thermocouple (6).

Abstract: A microwave drying device has a processing box. Two mounting openings are formed on an external mounting wall of the processing box. Two suction partitions are mounted in the processing box and divide an inner space of the processing box into a microwave drying space and two suction spaces. The microwave drying space is located between and connects to the two suction spaces. Multiple channel partitions are mounted in the microwave drying space to form a meandering wave travelling channel. Two opposite ends of the wave travelling channel connect to the two mounting openings respectively. Two microwave emitting modules are mounted on the external mounting wall and emit microwaves toward the two mounting openings respectively. Multiple openings are formed in the processing box such that a film can travel through the processing box. Therefore, drying speed is greatly increased, and the drying device is more compact.

Abstract: A cooking appliance includes a body that defines a cooking chamber therein, a door rotatably connected to the body and configured to open and close at least a portion of the cooking chamber, a hinge mechanism that rotatably connects the door to the body, and a control device disposed in the door. The control device includes a control housing that is configured to accommodate one or more components of the control device and that includes a first sidewall that defines an air inlet, and a second sidewall that defines an air outlet, an inlet-side cooling fan disposed at a first position of the control housing closer to the air inlet than the air outlet, and an outlet-side cooling fan disposed at a second position of the control housing closer to the air outlet than the air inlet.

Abstract: A method for drying at least one sample of material is provided. The method includes placing the at least one sample of material into a chamber and then sealing the chamber. The method includes applying a vacuum to the chamber in order to reduce the pressure therein. The method includes heating the at least one sample using electromagnetic energy while applying the vacuum to the chamber. The method includes measuring at least one condition of the chamber and determining that the sample is dry based on the at least one monitored condition.

Abstract: Embodiments include a microelectronic device package structure having an inductor within a portion of a substrate, wherein the inductor is at least partially embedded within the substrate. One or more thermal vent structures extend through at least one of the substrate or a board attached to the substrate. The one or more thermal vent structures provide a thermal pathway for cooling for the inductor.

Abstract: A heating cooker including a case including a cooking chamber configured to receive an object to be heated, a door configured to open and close the cooking chamber of the case, a ventilation path provided to extend along a wall surface of the cooking chamber in a state of being partitioned from the cooking chamber, a detector installed in the inside of the ventilation path and including one or more sensors configured to detect information on the inside of the cooking chamber through one or more detection holes formed on the wall surface of the cooking chamber, a shutter installed in the inside of the ventilation path and configured to open and close the one or more detection holes, and a cooling fan configured to suck outside air and blow the outside air into the ventilation path so as to cool the detector and the shutter together.

Abstract: A microwave appliance, as provided herein, may include a cabinet, a door, and an air handler. The cabinet may extend in a lateral direction between a first side end and a second side end. The door may be movably mounted to the cabinet at the first side end or the second side end to move between an open position permitting access to a cooking chamber and a closed position restricting access to the cooking chamber. The door may include a peripheral frame and a front window bounded by the peripheral frame. The peripheral frame may define an air inlet and an air outlet downstream from the air inlet. The air outlet may be defined below the front window. The air handler may be mounted within the door in fluid communication between the air inlet and the air outlet to motivate an airflow therethrough.

Abstract: A microwave appliance, as provided herein, may include an outer casing, an inner liner, a door, and an air handler. The outer casing may define an air inlet above a cooktop appliance. The outer casing may extend in a lateral direction between a first side end and a second side end. The inner casing may define a cooking chamber. The door may include a peripheral frame and a front window bounded by the peripheral frame. The peripheral frame may define an air outlet downstream from the air inlet and below the front window along the vertical direction. The air handler may be mounted within the outer casing in fluid communication between the air inlet and the air outlet to motivate an airflow therethrough. The air outlet may define an airflow curtain path extending outward from the outer casing in front of the door.

Abstract: A commercial oven, such as a combination oven providing steam and convection heating, may provide an equipment cabinet holding electronic equipment and having an external wall abutting other heating apparatus. The external wall includes an interior plenum through which air is circulated to provide compact virtual insulation from external heat sources.

Abstract: An air circulation system for an oven includes an inlet cavity, an attic region and a cooling fan. The oven includes a cooking chamber configured to receive a food product and an RF heating system configured to provide RF energy into the cooking chamber using solid state electronic components. The air circulation system is configured to provide air for cooling the solid state electronic components. The inlet cavity is disposed below the cooking chamber. The attic region is disposed above the cooking chamber and housing the solid state electronic components. The cooling fan isolates the inlet cavity from the attic region to maintain the inlet cavity at a pressure below ambient pressure to draw cooling air into the inlet cavity via an inlet array, and to maintain the attic region at a pressure above ambient pressure to discharge air that has cooled the solid state electronic components from an oven body of the oven.

Abstract: A microwave oven, in particular for a domestic appliance. The microwave oven includes an oven cavity at least partially enclosed by a cavity wall. The microwave oven also includes a microwave generator, in particular a magnetron, arranged out of the oven cavity. A matching section is interconnected between the magnetron and the cavity wall. The matching section covers an opening in the cavity wall. A magnetron antenna extends from the microwave generator into the matching section. At least one antenna extension is arranged inside the oven cavity. The antenna extension penetrates the opening in the cavity wall. The antenna extension is electrically connected to the magnetron antenna.

Abstract: A cooling system for a built-in induction hob with an improved cooling efficiency, and a cooling method thereof. The cooling system comprises an air blower for generating an airflow according to a first direction, a heat-sink device through which air blown by the air blower is conveyed. The cooling system further comprises airflow deflecting means for deflecting said airflow from said first direction to a second direction which significantly deviates from said first direction.

Abstract: A microwave oven has a cooking cavity and an electrical chamber, with a magnetron, a frequency converter assembly and a cooling fan arranged in the electrical chamber. The frequency converter assembly has a mounting support mounted on a bottom plate of the microwave oven, a mounting base obliquely mounted on the mounting support, a frequency converter circuit board mounted on the mounting base and obliquely arranged relative to the bottom plate of the microwave oven, and an air guide cover covering over the frequency converter circuit board for guiding cool air blown by the cooling fan to the frequency converter circuit board. The microwave oven can not only solve the problem that the mounting space for frequency converter circuit boards is not sufficient, but also effectively control the temperature rise of the frequency converter circuit boards.

Abstract: An exhaust system for a cooking or cooktop appliance is provided herein. The exhaust system may include a casing, an image monitor, and an air handler. The casing may define an air inlet and an air outlet above the cooktop appliance. The image monitor may be supported on the casing above a cooktop surface. The image monitor may include an imagining surface extending in a lateral direction between a first edge and a second edge. The air handler may be mounted within the casing in fluid communication between the air inlet and the air outlet to motivate an airflow therethrough. The air outlet may be defined proximal to the first edge and defines a coolant airflow path extending along the lateral direction across the imaging surface from the first edge.

Abstract: A method for operating fans within a microwave appliance is provided. The microwave appliance includes a sensor fan and an exhaust fan. The method includes operating the sensor fan of the microwave appliance when the exhaust fan of the microwave appliance is running. The sensor fan of the microwave appliances urges air over a sensor of the microwave appliance when the sensor fan is operating.

Abstract: Microwave dryers and a method of fabricating microwave dryers are disclosed. The microwave dryers include a microwave source that generates electromagnetic energy to dry a wet colorant applied to a continuous-form print medium. The microwave dryers further include a microwave waveguide electromagnetically coupled to the microwave source that transports the electromagnetic energy between a first end and a second end. The microwave waveguide includes a passageway that is sized to pass the continuous-form print medium through the microwave waveguide. The microwave dryer further includes a plurality of microwave absorbing elements within the microwave waveguide that absorb the electromagnetic energy and heat the wet colorant.

Abstract: Disclosed herein is an oven having a display module provided at a front of an electrical compartment, an outside air inlet unit formed at a body such that the air of the outside of the body may be inlet from an upper side of the display module, and a guide member provided at the electrical compartment as to guide the air inlet through the outside air inlet unit to move from the upper portion of the display module to a lower portion of the display module, thereby increasing cooling efficiency of the display module. In addition, the amount of the exhaust air of a cooking compartment may be adjusted while provided with a bypass hole to inlet the air of a cooling path into an exhaust path, and an opening/closing apparatus to open/close the bypass hole.

Abstract: An over-the-range microwave oven that includes a duct unit configured to direct air from the back of the oven to the front and further includes an integrated duct module. The duct unit includes: a first panel at the bottom, a pair of second panels forming both lateral side surfaces of the duct unit. The integrated duct module is disposed on the first panel and integrates a plurality of electrical components, such as a power source unit, a running capacitor, a noise filter and a fuse.

Abstract: A microwave oven includes a shell defining a cooling air inlet and a cooling air outlet therein; a compartment defining a cavity, nested in the shell and defining an open front end, a receiving space being defined between a rear plate of the compartment and a rear plate of the shell; a first electric member and a second electric member disposed in the receiving space respectively; and a fan disposed in the receiving space, defining a first air inlet, a second air inlet, a first air outlet communicated with the first air inlet to define a first air blowing channel, and a second air outlet communicated with the second air inlet to define a second air blowing channel, the fan being configured to cool the first electric member via the first air blowing channel and to cool the second electric member via the second air blowing channel.

Abstract: A high-frequency heating device with a range hood is equipped with a heating chamber, a magnetron for supplying high-frequency power, a chamber illumination device disposed adjacent, from outside, to a wall of the heating chamber, and an LED illumination device which is disposed in a bottom portion of the main body and illuminates a heat-cooking device. The LED illumination device uses light-emitting diode elements, and illumination light emitted from the LED illumination device is concentrated by a reflection plate whose surface is plated.

Abstract: A drawer type heating apparatus includes a heating case forming a heating space, and an openable door adapted to be moved in a drawing manner relative to the heating case for opening and closing an opening portion, and includes a radio-wave transmission suppression portion which is faced to inner wall surfaces of the opening portion of the heating case, and placed such that there is a predetermined gap between the radio-wave transmission suppression portion and the entire periphery of the inner wall surfaces of the opening portion in the heating case, in a state where the openable door is closed, the radio-wave transmission suppression portion including a first radio-wave-propagation-direction suppression-area constituted by a surface with a plurality of steps, and a second radio-wave-propagation-direction suppression-area having suppression protruding portions which are periodically formed and placed in such a way as to face the first radio-wave-propagation-direction suppression-area with a predetermined int

Abstract: The automatic document feeder includes a document tray, a document delivery tray, a document feed path, a feed roller, a housing member, and an ion generating unit. The housing member has at least an air intake portion and an air exhaust portion and is designed to accommodate a driving section therein. The ion generating unit is disposed laterally of the driving section within the housing member.

Abstract: An air filter mounting/demounting apparatus for a microwave oven having easy mounting and demounting of the air filter is provided. The apparatus includes a base plate having an inlet port through which air is admitted to serve as a hood, an air filter installed at a position corresponding to the inlet port and configured to filter foreign substances being admitted through the inlet port, an air filter bracket coupled to the base plate, an air filter holder at which the air filter is assembled coupled to the air filter bracket to enable a sliding movement along the guide rail, a latch unit configured to be coupled to the base plate to maintain and release engagement of the air filter holder aged, and a spring installed at an inside the latch unit to deliver an elastic force to the air filter holder.

Abstract: Embodiments disclosed herein include devices to cool the walls of a mobile computing device. In one embodiment, a louvered vent is formed within an external wall of a mobile computing device to create an air curtain between the external wall and a heat generating component to cool the external wall. In another embodiment, a nozzle vent is formed within the external wall of a mobile computing device to flow cooling air at a heat generating component to cool the heat generating component.

Abstract: An apparatus for fabricating semiconductor devices includes a chamber having a bottom plane, a side wall and a lid. An irradiating unit is at an interior of the chamber. A substrate mounting unit is between the bottom plane of the chamber and the irradiating unit. The irradiating unit includes an irradiating tube and a hole penetrating the central region of the irradiating tube. The irradiating tube has a hollow disk shape, and a lower surface of the irradiating tube is opened to the substrate mounting unit.

Abstract: A cooker is provided. The cooker includes a casing, a cavity part in the casing and including a cooking chamber to cook food, and an exhaust duct through which exhaust gas is discharged. The exhaust duct includes a first duct part having a lower end communicating with the cooking chamber, a second duct part extending from the other end of the first duct part, the second duct part making a predetermined angle with respect to the first duct part or having a predetermined curvature, and a flow passage extension protruded from a portion of the first duct part or the second duct part in an outward direction. At least a portion of the flow passage extension extends at an angle different from the predetermined angle between the first and second duct parts or the flow passage extension has a curvature different from the predetermined curvature of the second duct part.

Abstract: Microwave appliances and methods for operating microwave appliances are provided. A method includes operating a fan of the microwave appliance in order to draw a flow of air through a circulation conduit of the microwave appliance, measuring an operational characteristic of the fan with a sensor of the microwave appliance during the operating step, and providing an indicator signal when the operational characteristic exceeds a threshold value at the measuring step.

Abstract: Provided are a substrate processing apparatus and a method of manufacturing a semiconductor device that are capable of uniformly heating a substrate while reducing an increase in substrate temperature to reduce a thermal budget. The substrate processing apparatus includes a process chamber configured to process a substrate; a substrate support unit installed in the process chamber to support the substrate; a microwave supply unit configured to supply a microwave toward a process surface of the substrate supported by the substrate support unit, the microwave supply unit including a microwave radiating unit radiating the microwave supplied from a microwave source to the process chamber while rotating; a partition installed between the microwave supply unit and the substrate support unit; a cooling unit installed at the substrate support unit; and a control unit configured to control at least the substrate support unit, the microwave supply unit and the cooling unit.

Abstract: A microwave appliance and method for operating a microwave appliance are provided. The method includes operating a fan of the microwave appliance in order to draw a flow of air through a circulation conduit of the microwave appliance, measuring an air quality of the flow of air within the circulation conduit with a sensor of the microwave appliance, and deactivating the fan of the microwave appliance if the air quality of the flow of air within the circulation conduit of the microwave appliance exceeds a threshold value. In such a manner, the flow or air can be properly filtered without operating the fan of the microwave appliance excessively.

Abstract: The invention relates to a device for continuously carrying out chemical reactions. The device comprises a microwave generator, a microwave applicator accommodating a microwave-transparent tube, and an isothermal reaction section which is arranged such that the material to be reacted is guided inside the microwave-transparent tube through a microwave applicator which is used as the heating zone and in which it is heated to reaction temperature by means of microwaves that are emitted from the microwave generator into the microwave applicator. The material to be reacted, which is heated and optionally under pressure, is transferred from the microwave applicator to an isothermal reaction zone once it has left the heating zone, said reaction zone being arranged downstream of the heating zone, and is cooled once it has left the isothermal reaction zone.

Abstract: An over-the-range microwave oven and a ventilation passage system of the same are provided. The over-the-range microwave oven includes an outer casing defining a cooking cavity and an exhaust passage in the outer casing, the exhaust passage defining an inlet formed in a base plate of the outer casing and an outlet; and a baffle plate disposed below and facing the base plate, in which the baffle plate and the base plate are spaced apart from each other to form a smoke collection cavity between the baffle plate and the base plate.

Abstract: A cooking apparatus is provided. The cooking apparatus includes a cooking cavity, an upper space formed above the cooking cavity, lateral side spaces formed to at opposite lateral sides of the cooking cavity, a rear space formed behind the cooking cavity, and a lower space formed below the cooking cavity. A fan provided in the rear space generates a cooling flow that cools components housed in the rear space. A cooling flow path extends from the rear space and into the upper space and lateral side spaces. Flow from the upper space enters the door to cool the door and is exhausted through a lower portion of the door. Flow from the lateral side spaces, which includes an exhaust flow from the cooking cavity, is guided to the lower space and exhausted. In this manner, the cooking apparatus can be completely cooled and cooking odors and heat appropriately exhausted by the cooling fan positioned in the rear space.

Abstract: A cooking appliance such as a microwave oven is provided with a sacrificial region for repairing damage caused by arcing and related failure modes. The sacrificial region incorporates a component that, when damaged, is removable from the cooking appliance for replacement by another component of similar construction. In one implementation, a sacrificial component is utilized in a microwave oven with a heated cavity subject to microwave radiation from a magnetron. The sacrificial component in this example includes an aperture that communicates with an opening in the cavity, and through which the radiation impinges into the heated cavity.

Abstract: A heating system for hot water and conditioned air uses electromagnetic energy created by one or more magnetrons operated by high voltage transformers. The heating system includes oil cooled transformers and magnetrons. Using radiators in the form of heat exchangers, heat recovered from the transformers and magnetrons is dissipated directly into the path of the return air and the air handler blower. The magnetron heating system includes a coiled conduit sized to allow complete heating of the fluid flowing therethrough. The conduit has a conical shape to allow upper magnetrons to heat the outside of the conduit and lower magnetrons to heat the inside of the conduit.

Abstract: An oven is described having an interior space defined by a plurality of side walls, a duct, and a blower. The duct is in fluid communication with a ventilation aperture in at least one of the side walls and a supply of ambient air external to the oven cavity. The blower is in fluid communication with the duct and forces the supply of ambient air into the oven cavity via the ventilation aperture.

Abstract: A microwave heating apparatus is provided to perform heat treatment on a substrate to be processed by irradiating a microwave to the substrate in a processing chamber. The microwave heating apparatus includes a supporting table configured to support the substrate in the processing chamber, a microwave introducing unit configured to introduce the microwave into the processing chamber, a coolant channel formed in the supporting table, and a coolant supply source configured to supply a coolant to the coolant channel. At least a surface of the supporting table which supports the substrate is made of a material in which a product of a relative dielectric constant and a dielectric loss angle is smaller than 0.005, and the coolant supplied from the coolant supply source is liquid having no electrical polarity.

Abstract: A door for a cooking apparatus and a cooling system for the door are provided. A fan for creating flows of air into and out of a cavity assembly is also used to create flows of air in a door cooling passage of the door. Therefore, the door can be cooled in a simple manner.

Abstract: A microwave ground or road surface heating system that eliminates the need for preparation of the surface to be heated while preventing leakage of microwave radiation. The highly portable microwave heating system prevents leakage of microwave radiation via a microwave horn and sealing shroud configuration that seals the unit to the surface being heated.

Abstract: A heating cooker including a cooker body having a cooking chamber and a convection heating unit. The convection heating unit includes a convection heater to generate heat, a convection fan to forcibly move the heat generated from the convection heater into the cooking chamber, a convection motor to drive the convection fan, and a convection housing to receive the convection heater and the convection fan. The convection heater and the convection fan are linearly arranged within the convection housing, to allow air introduced into the convection housing to move from the convection fan to the convection heater. This configuration is effective to restrict the transfer of heat from the convection heater to the convection motor.

Abstract: A cooking device comprises: a body casing (1); a heating chamber (2) disposed within the body casing (1) and provided with a gas discharge opening; a gas discharge path having one end connected to the gas discharge opening of the heating chamber; a cooling fan disposed within the body casing (1) and cooling an electric component; and a cooling path formed within the body casing (1) and leading from an outside-air suction opening (100) through the cooling fan and an electric component chamber to a cool-air introducing opening (31a) in a gas discharge duct (30). At least a part of cooling air from the cooling fan flows along the cooling path, passes through a space near heaters (14, 14) within the body casing (1), enters the gas discharge duct (30) from the cool-air introducing opening (31a), and is discharged from a gas-discharge external opening (28).

Abstract: A microwave heating apparatus (101) includes a burning chamber (103) in which an object (102) to be burned is placed, a magnetron (116) for applying microwaves into the heating apparatus, a cooling gas introducing mechanism (112b) for introducing a cooling gas from outside the heating apparatus into the heating apparatus, a cooling gas channel (113b) through which the cooling gas flows to the burning chamber (103), heat-generating members (114a to 114e) for self-heating with microwaves applied thereto to heat the cooling gas flowing through the cooling gas channel (113b) and a control section (117) for, when the burning chamber (103) having the object (102) to be burned placed therein is cooled, causing the cooling gas introducing mechanism (112b) to introduce the cooling gas into the heating apparatus, and causing the magnetron (116) to intermittently apply microwaves into the heating apparatus.

Abstract: An observation window for a microwave device exhibiting microwave radiation of a predetermined frequency, the observation window comprising two optically transparent panels to which an optically transparent conductive film has been applied to a single side thereof, each of the transparent conductive films primarily reflecting incident microwave radiation and being substantially parallel and spatially separated from each other by a predetermined distance, the predetermined distance being equal to an odd integer multiple of one quarter of the wavelength of the microwave radiation of the predetermined frequency in the interstice between the transparent films, the predetermined distance having a tolerance of plus or minus 0.15 of the wavelength in the interstice.

Abstract: In a heating cooking device, a machine chamber is provided adjacent to a heating chamber for housing a food product. An air supply port is provided in a partition wall that separates the heating chamber and the machine chamber. An air supply fan is provided in the machine chamber, for supplying air to the heating chamber through the air supply port. An air supply damper is provided in the machine chamber, for opening and closing the air supply port. A control unit drives the air supply fan and brings the air supply damper into an open state during high-frequency heating of the food product. The control unit brings the air supply damper into a closed state simultaneously with completion of high-frequency heating of the food product or immediately before or immediately after the completion.