Abstract: A cooking device, wherein, when a roast chicken is selected from a menu displayed on an operating part (81), a centrifugal fan (51) is controlled so as to be rotated in forward direction at a high speed to blow out hot air with a speed of 65 km/h or faster from upper blowout ports (71) and hot air with a speed of 30 km/h or slower from side blowout ports (72) whereby a roast chicken in a heating chamber (3) can be cooked at the high speed and, when a sponge cake is selected from the menu, the centrifugal fan (51) is controlled so as to be rotated in reverse direction at a low speed to blow out hot air with a speed of 30 km/h or slower from the upper blowout ports (71) and hot air with a speed of 40 km/h or slower from the side blowout ports (72) whereby a sponge cake in the heating chamber (3) can be cooked light and fluffy.

Abstract: In a steam cooker, for heating of a food which is a mass of granular matters or linear matters such as rice or chow mein, a steam superheater is not turned on or is turned on with a very weak electric power so that steam supplied from steam supply pipes (94A to 94C) is substantially not superheated. Steam of 80° C. to 90° C. derived from the steam supply pipe (94B) is jetted out right downward from an opening (111a) of a steam jet pipe (111). Then, steam located around an end portion of the steam jet pipe (111) in a tray-shaped case (51) is pulled in by steam jetted out from the opening (111a), so that a large amount of steam is jetted against a bowl of rice or a dish of chow mein. As a result, surfaces of, for example, rice grains are prevented from immediately going beyond 100° C., so that condensation at the surfaces of the rice grains is efficiently achieved, and supply of condensed latent heat and penetration of condensed water (hot water) to the rice grains is efficiently achieved.

Abstract: In a steam cooker, a tray-shaped case (51) of a steam temperature-raising device (50) has a recessed part (51a) into which steam from a steam generator flows through steam supply ports (95A-95C) provided in a first sidewall (91). First and second steam superheaters (52, 53) are placed in the recessed part (51a) of the tray-shaped case (51) so as to be axisymmetrical with respect to a center line (L). A plurality of steam outlets (101A-104A, 101B-104B) for supplying steam into a heating chamber sideways are provided in second and third sidewalls (92A, 92B) adjoining the sidewall (91) having the steam supply ports (95A-95C) of the recessed part (51a), and on the opposite side of the steam supply ports (95A-95C). The tray-shaped case (51) is placed on a ceiling panel of the heating chamber and at steam outlets with an opening of the recessed part (51a) directed downward.

Abstract: In a steam cooker, a tray-shaped case (51) of a steam temperature-raising device (50) has a recessed part (51a) into which steam from a steam generator flows through steam supply ports (95A, 95B, 95C) provided in a first sidewall (91). The recessed part (51a) has a planar shape roughly axisymmetrical with respect to a center line (L) of a steam flow entering through the steam supply ports (95A, 95B, and 95C). First and second steam superheaters (52, 53) are placed in the recessed part (51a) of the tray-shaped case (51) so as to be axisymmetrical with respect to the center line (L). A spiral heat radiation fin (56) having a fin pitch of 10 mm or less is wound around the first steam superheater (52). The tray-shaped case (51) is placed on a ceiling panel of a heating chamber and at steam outlets with an opening of the recessed part (51a) directed downward.

Abstract: Steam generated by a steam generating device is fed, through an outer circulation passage, to a heating chamber. The steam generating device is provided with a barrel shape pot having a flat, elongate horizontal cross section, a steam generating heater arranged in a bottom part of the pot, and a steam suction portion that extends, above the pot, in a direction in which the steam suction portion crosses an axis line of the pot. The steam suction portion is built with a plurality of steam suction ejectors that are each formed to penetrate the pot from one flat side to an opposite flat side. The steam that has exited from the steam suction ejector flows through a duct into a sub-cavity provided adjacent to the heating chamber, then is heated by a vapor heating heater provided in the sub-cavity, and is then blown into the heating chamber.

Abstract: A sub-cavity with an integral steam heater is provided in a ceiling portion of a heating chamber. A gas in the heating chamber is sucked into a blower through a gas suction opening and sent into an external circulation path. The gas passing through the external circulation path sucks steam from a steam producing device by using steam suction ejector. The gas that took the steam in enters into the sub-cavity, as the gas return opening, from the external circulation path. The steam contained in the gas is heated by the steam heater in the sub-cavity to become an overheated state, spouted out downward from spouting holes in the bottom face of the sub-cavity, and collides with an object to be heated. The external circulation path is constructed from a pipe with a circular cross-section.

Abstract: A steam cooker, wherein a sub cavity incorporating a steam heating heater is formed at the center of the ceiling part of a heating chamber. Steam in the heating chamber is sucked into an air blow device through a suction port and force-fed into the sub cavity through an external circulating passage. Gas passed through the external circulation passage sucks steam from a steam generator midway in the external circulation passage and enters from the external circulation passage into the sub cavity. The steam heated by the steam heating heater until it is brought into an superheated state is jetted downward from a plurality of upper gas jetting holes formed in the bottom panel of the sub cavity by such a force that makes the steam reach the bottom of the heating chamber so that the steam can be collided with a heated matter. The steam is raised on the outside of downward air flow and the convection of steam occurs in the heating chamber.

Abstract: A cooking oven, wherein an upper blowing port blowing hot air in vertical direction and a lateral blowing port for blowing hot air in horizontal direction are provided in a cooking chamber, the upper blowing port is provided in the ceiling wall of the cooking chamber, the lateral blowing port is provided in one of the right and left inside walls thereof, and a suction port is provided in the bottom inside wall thereof in the form of collected perforations, air in the cooking chamber sucked from the suction port is fed to an upper duct and a lateral duct, heated by an upper heater and a lateral heater, respectively, and blown from the upper blowing port and the lateral blowing port, and the distribution of the perforations of the upper blowing port is made such that the distribution of the perforations at a position where the air blows toward air current from the lateral blowing port to a cooked object is made coarser than that at the other positions so that the air current in horizontal direction cannot be ob

Abstract: A cooker has an external circulation path outside a heating chamber in which foods are to be placed. A blower sucks in gas inside the heating chamber, and forms, in the external circulation path, a gas flow that makes the sucked gas return to the heating chamber. Downstream of the blower, the external circulation path is provided with an exhaust port, in which a damper is provided. The damper closes the exhaust port during cooking, and opens the exhaust port when a door of the heating chamber is opened. After the damper is changed to a position of opening the exhaust port, the blower continues to operate until a predetermined condition is satisfied.

Abstract: A controller device, after switching a traffic signal displayed on traffic signal equipment from a cross inhibition signal to a non cross inhibition signal, makes the traffic signal equipment display the non cross inhibition signal during a second time period before a second set time passes after a first time period ends to switch from the non cross inhibition signal to the cross inhibition signal responding to end of the second time period, if a detection signal indicating a target person of extension is received from a traverser detecting device during the first time period before a first set time passes after switching from the cross inhibition signal to the non cross inhibition signal. If no detection signal is received during the first time period, the controller device switches from the non cross inhibition signal to the cross inhibition signal responding to end of the first time period.

Abstract: A steam cooker, wherein a sub cavity incorporating a steam heating heater is formed at the center of the ceiling part of a heating chamber. Steam in the heating chamber is sucked into an air blow device through a suction port and force-fed into the sub cavity through an external circulating passage. Gas passed through the external circulation passage sucks steam from a steam generator midway in the external circulation passage and enters from the external circulation passage into the sub cavity. The steam heated by the steam heating heater until it is brought into an superheated state is jetted downward from a plurality of upper gas jetting holes formed in the bottom panel of the sub cavity by such a force that makes the steam reach the bottom of the heating chamber so that the steam can be collided with a heated matter. The steam is raised on the outside of downward air flow and the convection of steam occurs in the heating chamber.

Abstract: A sub-cavity with an integral steam heater is provided in a ceiling portion of a heating chamber. A gas in the heating chamber is sucked into a blower through a gas suction opening and sent into an external circulation path. The gas passing through the external circulation path sucks steam from a steam producing device by using steam suction ejector. The gas that took the steam in enters into the sub-cavity, as the gas return opening, from the external circulation path. The steam contained in the gas is heated by the steam heater in the sub-cavity to become an overheated state, spouted out downward from spouting holes in the bottom face of the sub-cavity, and collides with an object to be heated. The external circulation path is constructed from a pipe with a circular cross-section.

Abstract: A cooking oven, wherein an upper blowing port blowing hot air in vertical direction and a lateral blowing port for blowing hot air in horizontal direction are provided in a cooking chamber, the upper blowing port is provided in the ceiling wall of the cooking chamber, the lateral blowing port is provided in one of the right and left inside walls thereof, and a suction port is provided in the bottom inside wall thereof in the form of collected perforations, air in the cooking chamber sucked from the suction port is fed to an upper duct and a lateral duct, heated by an upper heater and a lateral heater, respectively, and blown from the upper blowing port and the lateral blowing port, and the distribution of the perforations of the upper blowing port is made such that the distribution of the perforations at a position where the air blows toward air current from the lateral blowing port to a cooked object is made coarser than that at the other positions so that the air current in horizontal direction cannot be ob

Abstract: An infrared type gas analyzer having measuring and reference cells is equipped with alternately switchable valves so that the cells can alternate acting as the measuring and reference cells. The output of the detector is stored for each configuration and these outputs are subtracted from one another to provide the output of the analyzer.

Abstract: An infrared type gas analyzer having measuring and reference cells is equipped with alternately switchable valves so that the cells can alternate acting as the measuring and reference cells. The output of the detector is stored for each configuration and these outputs are subtracted from one another to provide the output of the analyzer.