Frontier Inc.

Haitai Electronics Co., Ltd.

Gordon W Fenn

Young Moon Ryoo

Min H Oh

Hong Jib Kim

Yong S Lee

Myeong C Park

Hong J Kim

There is disclosed a combustion control circuit of a combustion apparatus with a driving signal generator, an exhaust fan controller and a gas valve controller, including: a combustion state detector for detecting the state of combustion occurring within a combustion chamber according to an output signal of a flame sensor installed in the combustion chamber, and for producing a signal corresponding to the state of combustion; a reference signal generator for producing a reference signal in response to each output signal of a temperature sensor and a flow sensor; a comparator for comparing the output signal of the combustion state detector with the output signal of the reference signal generator, and for outputting a signal corresponding to a difference therebetween; and an adder for adding the output signal of the comparator to the output signal of the driving signal-generator, and for respectively applying an output to each one of the exhaust fan controller and the gas valve controller.

Combustion control circuit of combustion apparatus

There is disclosed a combustion-state detecting circuit of a combustion apparatus installed in a combustion chamber, including: a flame detector that has a heat-emitting device for emitting heat on application of an alternating current signal, and produces a potential difference between the current applied to the heat-emitting device and flame-electric current produced by ignition occurring within the combustion chamber; a rectifier that changes the alternating current signal provided by the flame detector into a direct current signal; an inversion amplifier that inverts the direct current signal produced by the rectifier with respect to a reference signal and increases the magnitude of the inverted signal; and a flame discriminator that compares the output signal of the inversion amplifier with a flame discriminating reference signal to determine if ignition occurs.

Combustion-state detecting circuit of combustion apparatus

A burner for a gas burning apparatus is disclosed including: a swirl plate in which a plurality of mixing pipe seats having through-holes are formed at predetermined intervals on the same circumference of the central portion; a lowest flame holder having a plurality of flame holes on the sides, and in which mixing pipe seats one fewer than the number of the mixing pipe seats of the swirl plate are formed; a plurality of intermediate flame holders on whose sides a plurality of flame holes are formed, and in which mixing pipe seats one fewer than the number of the mixing pipe seats of the lower flame holder are formed; a highest flame holder on whose sides a plurality of flame holes are formed; mixing pipes interposed between corresponding upper and lower mixing pipe seats of the swirl plate and lowest flame holder, and between corresponding upper and lower mixing pipe seats of the lowest flame holder and intermediate flame holders stacked thereon; a gas chamber spaced apart from the swirl plate with a plurality of spacers; a plurality of nozzles installed on the upper wall of the gas chamber and on the corresponding position to the mixing pipe seats of the swirl plate located thereabove; and an opening/closing valve for opening/closing a plurality of nozzles.

Burner for gas burning apparatus

A burner for a burning apparatus is disclosed including: a mixing liner support formed with an intake hole; a mixing liner for mixing supplied gas and first air; a matrix inserted into the inner upper portion of the mixing liner and having numerous flame holes in a gauze form; a mixing plate installed above the intake hole of the mixing liner support and spaced apart upward from the mixing liner support; a nozzle plate having a plurality of injection hole disposed at predetermined intervals on the same circumference; a gas chamber formed with a gas intake in the lower portion; and a gas valve for opening/closing the gas intake of the gas chamber.

Burner for burning apparatus

A heat exchanger is disclosed including an annular lower manifold to which a cold-water intake through which cold water comes is connected; an annular upper manifold to which a hot-water exit through which hot water is discharged is connected; a plurality of coil-shaped heat exchange tubes connected between the lower and upper manifolds; an inner liner for embracing the plurality of coil-shaped heat exchange tubes on the inner surface thereof; and an outer liner for embracing the plurality of coil-shaped heat exchange tubes on the outer surface thereof, the inner and outer liners forming a path of burned gas.

Heat exchanger

A gas quick water heater is disclosed which includes a heat exchanger having an annular lower manifold with a cold-water intake, an annular upper manifold with a hot-water exit, a plurality of coil-shaped heat exchanging tubes connected between the manifolds, and a baffle plate installed in the center of the heat exchanging tubes and for delaying the flow of heated air; an inner liner for closely embracing the inner surface of the heat exchanging tubes of the heat exchanger; an outer liner designed higher than the inner liner in height and for closely embracing the outer surface of the heat exchanging tubes; a lower plate for closing a lower portion between the inner and outer liners and having an air intake at the center; a swirl plate having a plurality of air intakes at the periphery and a gas hole at the center portion; a combustion barrel having a plurality of air intakes on the overall surface; an insulation member in which the top surface is closed and the lower surface is opened to form an annular air intake; and an exhaust fan for discharging burned gas through the opening of the outer liner and the exhaust port of the barrier.

Gas quick water heater

A hot-water thermoregulating valve is disclosed including a hot-water supply cap; a cold-water supply cap; a main body located between the hot-water supply cap and cold-water supply cap; first and second disks formed with a circular hole on the center, respectively; first and second stems for opening/closing the first and second disks and formed with a smaller-diameter portion inserted into the slide cavity of the first and second protrusions, a taper portion inserted into the hole of the first and second disks, and a larger-diameter portion having a reception hollow; first and second pistons contained in the main body, one end being coupled to the reception hollow of the first and second stems, the other end coming into contact with the damper, and having first and second springs; and a step motor, thereby automatically controlling the temperature of hot water.

Hot-water thermoregulating valve

The heat exchange structure comprises a series of tubes arranged in a circular pattern extending between upper and lower manifolds. Water flows from the upper manifold through these tubes to the lower manifold. Annular fins are stacked on these tubes. A larger tube is arranged concentric with each of the smaller diameter water-carrying tubes and hot gaseous products of combustion flow through these larger tubes in counterflow to the water flow through the water tubes. The fins have through-holes allowing the hot gases to pass through the stacks of fins. The combustion chamber is located centrally just above the lower manifold. Ambient air is introduced via perforations in the side wall of the casing near the upper manifold and flows downwardly past the heat exchange structure for recuperative effect before reaching the combustion chamber.

Ultra-high efficiency on-demand water heater and heat exchanger

A device for stimulating the skin of an individual by an applicator which has a head containing solenoid-operated plungers. The solenoids' windings are duty-cycle operated by associated oscillator/driver circuits to cause their plungers to repeatedly impact the skin with relatively small force impulses so that the skin as distinguished from muscles is affected. By repeated minute stimulation of the skin in the vicinity of pain, a hypnotic type of effect that can alleviate pain symptoms has been found to occur. The solenoids are operated in particular modes which are other than one in which all solenoids are simultaneously energized and de-energized in unison.

Growing community of inventors

Brevard, NC, United States of America

Gordon W Fenn