Abstract: An infrared radiation heater includes: a combustion chamber having a combustion space that is open on one side; a combustion device provided in the combustion chamber to combust air-fuel mixture made by mixing fuel with air; and a radiator configured to be heated by heat generated from the combustion device and including a radiation plane configured to emit infrared radiation. The combustion device includes: a nozzle provided in a flow path of the air to inject the fuel; a tubular body including a side surface that faces a direction with a predetermined angle with respect to the radiation plane, and a plurality of voids being formed on the side surface; and an ignition device provided outside of the tubular body and configured to ignite the air-fuel mixture. The air-fuel mixture flows into the tubular body, and the tubular body releases the air-fuel mixture from the voids into the combustion chamber.

Abstract: An infrared radiation heater includes: a combustion chamber having a combustion space that is open on one side; a combustion device provided in the combustion chamber to combust air-fuel mixture made by mixing fuel with air; and a radiator configured to be heated by heat generated from the combustion device and including a radiation plane configured to emit infrared radiation. The combustion device includes: a nozzle provided in a flow path of the air to inject the fuel; a tubular body including a side surface that faces a direction with a predetermined angle with respect to the radiation plane, and a plurality of voids being formed on the side surface; and an ignition device provided outside of the tubular body and configured to ignite the air-fuel mixture. The air-fuel mixture flows into the tubular body, and the tubular body releases the air-fuel mixture from the voids into the combustion chamber.

Abstract: An object of the present invention is to realize a combustion control device that reduces, when a pressure within a mixer is rapidly increased at the time of ignition of the combustion control device, the transmission of the temporarily increased pressure to a pressure sensor, that brings the pressure sensor into a non-operated state and that thereby can continue combustion in the combustion control device. Hence, a combustion control device is provided that includes: a combustion chamber which has a heat dissipation disc on a front surface and within which a combustion room is formed; a burner which is attached to the combustion chamber; a mixer which mixes a gas supplied to the burner with air; and a pressure sensor which is connected to the mixer through a pressure passage, where a pressure propagation delay means which reduces transmission to the pressure sensor caused by a temporary pressure increase within the mixer is provided partway along the pressure passage.

Abstract: A combustion control device includes a combustion fan motor, a control unit, a silicon diode group, a silicon diode, and a combustion-fan-disconnection detecting unit. The control unit is configured to control a combustion state of the combustion fan motor. The silicon diode group includes at least two silicon diodes coupled in series to the combustion fan motor. The silicon diode is coupled in parallel to the silicon diode group with a reversed polarity. The combustion-fan-disconnection detecting unit includes a photocoupler and a resistor. The photocoupler and the resistor are coupled in parallel to the silicon diode group and the silicon diode with the same polarity as a polarity of the silicon diode group side.

Abstract: An object of the present invention is to realize a combustion control device that reduces, when a pressure within a mixer is rapidly increased at the time of ignition of the combustion control device, the transmission of the temporarily increased pressure to a pressure sensor, that brings the pressure sensor into a non-operated state and that thereby can continue combustion in the combustion control device. Hence, a combustion control device is provided that includes: a combustion chamber which has a heat dissipation disc on a front surface and within which a combustion room is formed; a burner which is attached to the combustion chamber; a mixer which mixes a gas supplied to the burner with air; and a pressure sensor which is connected to the mixer through a pressure passage, where a pressure propagation delay means which reduces transmission to the pressure sensor caused by a temporary pressure increase within the mixer is provided partway along the pressure passage.

Abstract: A combustion control device includes a combustion fan motor, a control unit, a silicon diode group, a silicon diode, and a combustion-fan-disconnection detecting unit. The control unit is configured to control a combustion state of the combustion fan motor. The silicon diode group includes at least two silicon diodes coupled in series to the combustion fan motor. The silicon diode is coupled in parallel to the silicon diode group with a reversed polarity. The combustion-fan-disconnection detecting unit includes a photocoupler and a resistor. The photocoupler and the resistor are coupled in parallel to the silicon diode group and the silicon diode with the same polarity as a polarity of the silicon diode group side.

Abstract: In a grain milling machine, a milling chamber 25 is defined by a gap between a cylindrical body 24 and a rotating body 23, and grinding plates 27 and 28 are arranged on both facing surfaces of the milling chamber 25. On the surface of at least one of the grinding plates 27 and 28, polyhedral hard diamond abrasive grains are deposited. The grinding plate 27 provided on the side of the cylindrical body 24 is fixed, and the grinding plate 28 provided on the side of the rotating body 24 moves with respect to the grinding plate 27, so that the surfaces of grains fed into the milling chamber 25 are ground by the grinding function applied between the grinding plates 27 and 28. Thus, it is possible to maintain sufficient grinding force and to carry out efficient and high-quality grain milling without the need of any complicated maintenance of the machine.

Abstract: A workpiece is moved in a plus direction or in a minus direction or in a minus direction on an X-axis to be contacted with an electrode. The moved distance Lx is calculated. The workpiece is moved in the opposite direction by the Lx/2. Similarly, the workpiece is moved in a plus direction or in a minus direction on a Y-axis and returned by the Ly/2.

Abstract: A liquid fuel combustion type infrared ray irradiating apparatus includes a base having a generally rectangular-shaped framework, each corner of which is provided with a wheel, a fuel tank fixed to the base, and a pump disposed on the base and adapted to pump fuel from the fuel tank. A combustion chamber is connected to a burner which receives fuel from the pump for combustion. An irradiation pipe is connected to the combustion chamber for guiding combustion gas from the combustion chamber into an upper chimney, receiving heat from the combustion gas, and irradiating infrared rays. Reflecting plates are disposed to forwardly reflect rearwardly directed radiant heat which has been radiated from the irradiation pipe.

Abstract: A working electrode is positioned to form a predetermined gap between the working electrode and a surface of a work, and the electrode and the work are submerged in an electrolyte. Pulses are applied to the working electrode to machine the work. A pair of standard electrodes are set in the electrolyte, and electric energy in the form of a pulse is applied to the standard electrodes. Current flowing between the standard electrodes is detected and the current density of the current flowing between the working electrode and the work is controlled based on the detected current.

Abstract: An electrode is positioned to form a predetermined gap between the electrode and a surface of a work, and the electrode and the work are submerged in an electrolyte. Thereafter pulses are applied to the electrode, and clean electrolyte is supplied to the gap. A theoretical number of machining passes necessary for obtaining a desired machining depth is set and an actually machining of on the surface of the work is carried out in accordance with the theoretical number is the depth of cut measured. The theoretical number of machining is then changed, based on the measured cut depth. Machining is further performed in accordance with the changed theoretical number of machining.

Abstract: A method and apparatus for electro-chemical machining involve: supplying a pulse having a predetermined current density between an electrode and an object to be worked while they face each other with a static electrolyte therebetween; detecting the current of the pulse supplied between the electrode and the object to be worked; comparing the detected current with a reference current set in accordance with factors such as properties of the object to be worked, and increasing the current density of the pulse on the basis of the result of the comparison; supplying pulses having the increased current density between the electrode and the object to be worked a predetermined number of times; and removing electrolytic products generated between the electrode and the object to be worked.

Abstract: An electrode is positioned to form a predetermined gap between the electrode and a surface of a work, and the electrode and the work are submerged in an electrolyte. Thereafter pulses are applied to the electrode and clean electrolyte is supplied to the gap. The pulse application is performed by a pulse having a peak current density between 30 A/cm.sup.2 and 50 A/cm.sup.2 and a pulse duration between 2 msec and 10 msec.

Abstract: A finishing method employing electro-chemical process includes the steps of: supplying identical pulses between an electrode and a workpiece disposed opposite to each other in a stationary electrolyte with a predetermined gap therebetween; reducing the gap after the pulses have been supplied; thereafter enlarging the gap; and injecting electrolyte into the gap during the step of enlarging the gap.

Abstract: An electrode is positioned to form a predetermined gap between the electrode and a surface of a work, and the electrode and the work are submerged in an electrolyte. Pulses are applied to the electrode to machine the work. The electric energy of the pulse is set in such a manner that the electric energy per unit area is reduced with increase of the area.