A refrigeration control system for modulating an electrically-operated expansion valve in which a modulating, electrically-operated expansion valve is connected to the evaporator inlet, and first and second condition-responsive electrical sensors are positioned to respond to conditions at selected location in the system. An electrical amplifier circuit connects the condition-responsive electrical sensors to the valve for regulating the opening and closing of the valve in response to differences in the conditions sensed by the sensors. Refrigerant is fed to at least one of the sensors so as to cause modulation of the expansion valve. More particularly, the condition-responsive sensors are temperature-responsive, the first sensor being positioned to respond to the temperature of the liquid refrigerant expanded to suction pressure, and the second sensor being positioned to respond to suction line sensible temperature. The valve will then modulate to control superheat in response to the differences in the temperatures sensed by the sensors.

Refrigeration control system for modulating electrically-operated expansion valves

An induction-heating cooker includes an infrared sensor for detecting infrared rays emitted from a cooking container, a scorching detecting portion for outputting, when a temperature of the cooking container increases from a first set temperature and exceeds a second set temperature, scorching detection information based on infrared detection information of the infrared sensor in a heating mode in which a power can be set, and a loading detecting portion for detecting addition of a load such as, for example, a material to be cooked based on a change of the infrared detection information. Even if the scorching detecting portion outputs the scorching detection information before a cooking time measured from the start of a heating operation reaches a first set time, a controller continues the heating operation. If the loading detecting portion detects that the load has been added, the measured cooking time is cleared and measurement thereof is restarted.

Induction heating cooker

Disclosed is a dryer device and a drying control system utilizing an infrared sensor that measures the temperature of garments or items being dried in a drying device. The invention provides significant improvement over conventional techniques using temperature sensors, or such sensors in combination with moisture or humidity sensors. Also disclosed are methods for controlling drying temperatures and methods for determining drying cycle completion.

Infrared temperature sensing for tumble drying control

PROBLEM TO BE SOLVED: To display a heat storage amount stored in a hot water storage tank by a usable mixing hot water amount when continuing hot water supply presently used by a user SOLUTION: A usable mixing hot water producing means provided in the hot water supply device calculates the mixing hot water amount that can be used in a hot water using portion such as a bath, shower, or a hot water tap on the basis of the heat storage amount stored in the hot water storage tank of the hot water supply device, a set supply hot water temperature set by the user, and a temperature of service water The usable mixing hot water amount calculated by the usable mixing hot water amount calculating means is displayed by a display 23a of a remote control 23 COPYRIGHT: (C)2006,JPO&NCIPI

Hot water supply device

The present invention overcomes many of the disadvantages of prior art mobile oil field heat exchange systems by providing an oil-fired heat exchange system. The present invention is a self-contained unit which is easily transported to remote locations. The present invention includes a single-pass tubular coil heat exchanger contained within a closed-bottom firebox having a forced-air combustion and cooling system. The rig also includes integral fuel tanks, hydraulic and pneumatic systems for operating the rig at remote operations in all weather environments. In a preferred embodiment, the oil-fired heat exchanger system is used to heat water on-the-fly (i.e., directly from the supply source to the well head) to complete hydraulic fracturing operations. The present invention also includes systems for regulating and adjusting the fuel/air mixture within the firebox to maximize the combustion efficiency. The system includes a novel hood opening mechanism attached to the exhaust stack of the firebox.

Oil-fired frac water heater

A fluid-flow control valve arrangement comprising valve means operable in different conditions including variable-flow,, constant-flow and zero-flow mode conditions depending upon predetermined ranges of a prescribed operational parameter, the valve arrangement being useful especially for the control of the flow of fuel in a heating device such as a gas-burning water heating device.

Multiple-mode fluid-flow control valve arrangement

An electromagnetic valve comprises a magnetic circuit formed by a stationary core and a movable core, or armature pivoted at one end of the stationary core and rotatable continuously between first and second positions with a free end positioned in opposed relation to the other end of the stationary core with an air gap therebetween. The armature is spring biased so as to remain in the first position and carries a valve head for engagement with a valve seat. The opposing ends of the stationary and movable cores are so shaped as to form in the air gap a first working section in which the main magnetic flux generates a vector component transverse to the length of the armature and a second working section in which the main magnetic flux generates a vector component parallel to the length of the armature. The resulting vector makes the angular displacement of the armature linearly proportional to the supply current.

Analog displacement type electromagnetic valve

A combustion control system having incorporated therein an electronic circuit for driving and controlling a proportional control valve provided on a fuel supply line to control the amount of combustion and thereby maintain the temperature of fluid to be heated by combustion at a constant level even when the amount of the fluid varies per unit time The output voltage of a bridge circuit including a sensor for detecting the temperature of the fluid as a component is fed to operation amplifiers for differentiating, integrating and proportional amplification to control the control valve with the resulting output The system is best suited for use in instantaneous water heaters

Combustion control system

PURPOSE: To devise to use the same electromagnetic proportional control valve and the same valve control circuit for different gases by changing the intensity of interrupting electricity according to the sort of gas to close perfectly the electromagnetic proportional control valve to control the combustion amount with the signal froma a thermal sensor element. COPYRIGHT: (C)1978,JPO&Japio

Thermal control circuit

PURPOSE:To improve both the temperature control property and the transient temperature property, by varying the proportion output signal with the integral output signal not by piling the integral output over the proportion output signal. CONSTITUTION:The capacitor 23 which delivers the integral value is connected to one side of the proportion control bridge circuit by the transistor 27 and the fixed resistance 28 which form an emitter-follower circuit. Thus with increment of the both-terminal voltage of the capacitor 23, the set temperature of the proportion control circuit is increased automatically to compensate the deviation of temperature which is caused when a control is given only by the proportion output signal. The thermistor 7 has a large value of resistance when the temperature supplied is low and energizes the transistors 16 and 17. Thus the coil 10 is driven to supply the gas to a gas burner and thus increase the temperature of the hot water to be supplied.

Mori Keiichi

Papers

Multiple-mode fluid-flow control valve arrangement

Analog displacement type electromagnetic valve

Combustion control system

Thermal control circuit

Automatic control circuit