Abstract: A refrigerant compressor reserves lubricating oil in a sealed container, and accommodates therein an electric component, and a compression component which is driven by the electric component and compresses a refrigerant. At least one of slide members included in the compression component is made of an iron-based material, and an oxide coating film comprising a composition A portion, a composition B portion, and a composition C portion is provided on a slide surface of the iron-based material. The composition A portion is a portion containing diiron trioxide (Fe2O3) which is more in quantity than other substances, and is, for example, an outermost portion (160a). The composition B portion is a portion containing triiron tetraoxide (Fe3O4) which is more in quantity than other substances and containing a silicon (Si) compound, and is, for example, an intermediate portion (160b).

Abstract: A refrigerant compressor comprises an electric component; and a compression component which is driven by the electric component and compresses a refrigerant. At least one of slide members included in the compression component is made of an iron-based material. An oxide coating film (150) is provided on a slide surface of the iron-based material, the oxide coating film including a first portion (151), a second portion (152), and/or a third portion (153). The first portion (151) contains at least fine crystals (155). The second portion (152) contains columnar grains (156). The third portion (153) contains layered grains (157).

Abstract: A refrigerant compressor reserves lubricating oil with a viscosity of VG2 to VG100 in a sealed container, and accommodates therein an electric component and a compression component which is driven by the electric component and compresses a refrigerant. The compression component includes at least one slide member comprising a base material 171 made of an iron-based material and an oxide coating film 170 provided on a surface of the base material 171. The oxide coating film 170 includes: a portion containing diiron trioxide (Fe2O3), in a region which is closer to an outermost surface of the oxide coating film; and a silicon containing portion containing silicon (Si) which is more in quantity than silicon (Si) of the base material 171, in a region which is closer to the base material 171.

Abstract: A protection device, in particular a fire protection device on a motor vehicle. The device includes a fire fighting device having at least one container which is filled with an extinguishing agent and which can be paired with a body of a vehicle or an airplane or with a building wall or ceiling and comprising at least one outlet device which is to be closed by a temperature-controlled first valve, and/or the device includes at least one temperature-resistant tank which can be fluidically connected to an air conditioner, in which a negative pressure is present in order to receive a coolant of the air conditioner, and which is paired with at least one temperature-controlled second valve in order to open at least one flow channel for the coolant.

Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, an utilization-side heat exchanger, a first expansion valve, and an outdoor heat exchanger; an injection pipe which includes a solenoid switching valve and a second expansion valve; and an objective supercooling degree table which stores objective supercooling degrees according to condensing pressure in the refrigerant circuit and rotation number of the compressor. In the heat pump apparatus, liquid refrigerant is injected to the compressor by way of the injection pipe. The heat pump apparatus switches between a first case where the liquid refrigerant is injected to the compressor and a second case where the liquid refrigerant is not injected, and a value of the objective supercooling degree is changed between the first case and the second case to control the first expansion valve based on the value of the objective supercooling degree.

Abstract: An air conditioning apparatus includes a refrigerant circuit, an operation controlling device and a liquid refrigerant accumulation determining device. The refrigerant circuit has an accumulator. The operation controlling device performs normal operation control where each device of the heat source unit and the utilization unit are controlled in accordance with operating load of the utilization unit, and refrigerant quantity determination operation control where properness of quantity of the refrigerant in the refrigerant circuit is determined while performing the cooling operation. The liquid refrigerant accumulation determining device determines whether or not liquid refrigerant is accumulating in the accumulator. When it has been determined that liquid refrigerant is accumulating in the accumulator, liquid refrigerant accumulation control is performed to eliminate liquid refrigerant accumulation in the accumulator.

Abstract: A vehicle air-conditioning system of a dual air conditioner type includes a front seat air-conditioning unit for air-conditioning a front seat side and a rear seat air-conditioning unit for air-conditioning a rear seat side. The system includes parallel connected evaporators for the front seat air-conditioning unit and the rear seat air-conditioning unit. At a low flow rate of refrigerant, the system prevents a significant increase in the temperature of air blown into the rear seat area relative to the temperature in the front seat area. The system employs a variable capacity compressor that enables its discharge capacity to be controlled by an external control signal, allowing the discharge capacity of the compressor to be controlled in accordance with the higher evaporator temperature of the temperatures at the front seat evaporator and the rear seat evaporator and a target evaporator temperature.

Abstract: By the use of the suction pressure of a compressor, the pressure in back pressure chambers 71g and 71h are reduced to open a refrigerant inlet side and a refrigerant outlet side of an evaporator, and when the compressor is at rest, by the use of a first coil spring 76 and a second coil spring 77, the refrigerant inlet side and the refrigerant outlet side of the evaporator 40 are closed mechanically. Due to this, it is possible to minimize a refrigerant leak by the use of an inexpensive means.

Abstract: A system and method for controlling the climate within a storage container including at least two cargo areas. The system includes one compressor, one condenser, and two evaporators. Each of the evaporators includes a crankcase pressure regulator, a gas valve and a liquid valve. The crankcase pressure regulators provide a common pressure between each of the evaporators and the compressor regardless of the pressure at the evaporator. A control system selectively actuates the gas and liquid valves according to a predefined control mode to obtain and maintain a desired temperature.

Abstract: A method for controlling operation of a refrigerator having two evaporators is disclosed, in which food can be effectively stored with a frozen state or a refrigerated state. To this end, the method for controlling operation of a refrigerator having two evaporators includes the steps of (a) starting a compressor in which a drive of the compressor starts; (b) continuous operation in which the RF cycle or the F cycle is operated according to a temperature of the freezing chamber or the refrigerating chamber after the compressor is operated; and (c) stopping a operation of the compressor if a temperature of the freezing chamber or the refrigerating chamber corresponds to each preset temperature range, thereby making a cycle and repeatedly processing.

Abstract: A combined refrigerator-oven apparatus (20) includes an enclosed chamber (28) having a top wall (22), a bottom wall (24), and vertical side walls (26). The bottom wall (24) has an airflow inlet opening (54). An airflow inlet gate (58) removably blocks the airflow inlet opening (54). A heating unit (50) is positioned in the enclosed chamber (28) and a refrigeration unit (70) is positioned outside of the enclosed chamber (28). The refrigeration unit (70) has a cool air duct (80) coupled to the airflow inlet opening (54). A controller (118) is in communication with each of the gate (58), the heating unit (50), and the refrigeration unit (70). When a cooling mode is selected, the controller (118) actuates the airflow inlet gate (58) to unblock the airflow inlet opening (54). The controller (118) further activates the refrigeration unit (70) to deliver cool air (62) into the enclosed chamber (28).

Abstract: Preferred embodiments of the present invention have a nozzle assembly capable of controlling pressure of comestible fluid exiting the nozzle assembly, a refrigeration system in which refrigerant pressure and temperature is controllable to enable control of comestible fluid temperature, heat exchangers connected to cool comestible fluid in the nozzles, an ultraviolet sterilization system for sterilizing locations outside and inside the system, and a hand held comestible fluid dispenser capable of cooling and selectively dispensing one of several comestible fluids supplied thereto. To provide comestible fluid at rack pressure to the nozzles in one highly preferred embodiment, each nozzle preferably has a valve movable through a number of closed positions to change pressure within the nozzle. Prior to fluid dispense, pressure at the nozzle is preferably reduced by actuating the valve through its range of closed positions.

Abstract: A subcooling unit within a vapor compression refrigerant system contains a controller for controlling the rate of flow of refrigerant into the chamber of the subcooling unit. The controller receives a sensed temperature of the fluid entering a condensing unit within the chamber of the subcooling unit and computes a condensing pressure setpoint for the refrigerant flowing into the chamber of the subcooling unit. The controller is operative to compare the pressure in the subcooling chamber with the condensing pressure setpoint so as to determine whether to possibly increase or decrease the rate of flow of the refrigerant into the chamber of the subcooling unit.

Abstract: An air conditioning system having an evaporator 8 at a location upstream from a compressor. When a compressor is stopped, a refrigerant inlet is closed by an electromagnetic valve 28 and a refrigerant outlet is closed by a check valve 29. A pressure in the closed passageway is detected by a pressure sensor 22. A leakage of refrigerant at the evaporator is reliably detected, which allows the leakage of the refrigerant to be quickly noticed.

Abstract: A control apparatus for a gas injection type air conditioning system that prevents lowering of compressor speed and cycle stoppage under conditions where high pressure is liable to occur. During a system heating mode, a pressure change rate ASP of the high pressure of the refrigerating cycle is calculated. When a pressure change rate .increment.SP rises above a predetermined value, a system electric expansion valve aperture is reduced. Accordingly, by calculation of the pressure change rate .increment.SP, it is possible to control the electric expansion valve in the above manner earlier than in prior art control schemes when there is a sudden rise in the high pressure.

Abstract: A refrigeration system comprises an evaporator having an inlet and an outlet, a condenser, a compressor that is located between the evaporator and the condenser and that provides suction pressure at the evaporator outlet, an expansion valve that is connected to the evaporator inlet and that is operable to regulate a flow of refrigerant into the evaporator, a pressure regulator that is connected to the evaporator outlet and that is operable to limit the suction pressure to a regulated value, and a controller that coordinates operation of the pressure regulator with operation of the expansion valve.

Abstract: A refrigerant expansion device for a refrigeration cycle comprises a housing, a passage formed penetrating the housing, an expansion means for expanding the refrigerant passing through the passage and a flow rate control means for bypassing some of the refrigerant passing through the expansion means according to the pressure of the refrigerant, for supplying to the low pressure portion of the passage, and for controlling the flow rate of the refrigerant through the expansion means.

Abstract: A climate controller for an automobile, comprising a compressor and a receiver arranged in an engine compartment of the automobile, a condenser located at an outside-air inlet of the engine compartment, an expansion member and an evaporator disposed in a passenger compartment of the automobile, and a closed-loop refrigerant passage connecting the compressor, the condenser, the receiver, the expansion member and the evaporator in sequence for circulating a refrigerant through these components to establish a refrigerating cycle. The climate controller further includes a valve arranged in a part of the closed-loop refrigerant passage extending from the evaporator through the compressor to the condenser. The valve is actuated to intersect a communication of the refrigerant through the part of the passage when an operation affecting temperature of both the compressor and the condenser becomes ineffective, and to allow the communication when the operation becomes effective.

Abstract: A multiroom airconditioner includes a plurality of indoor units, each of them having an indoor heat exchanger, an outdoor unit having an outdoor heat exchanger and a device for equalizing the pressure of the refrigerant flowing from the indoor units to the outdoor unit, wherein the outdoor heat exchanger is divided into an identical number of sections as that of the indoor heat exchanger, each of the sections being connected to each of the indoor units in one to one basis.

Abstract: An outdoor unit has a compressor and an outdoor heat exchanger. Each of a plurality of indoor units has an indoor heat exchanger. The outdoor unit is connected in parallel with the plurality of indoor units to form a multi-type air conditioner system having a plurality of refrigeration cycles. A plurality of gaseous flow adjustment valves are provided to the gaseous sides of the indoor units, respectively. A plurality of liquid expansion valves are provided to the liquid sides of the indoor unit, respectively. A refrigerant super-heat degree detector detects a refrigerant super-heat degree of the outdoor heat exchanger or the indoor heat exchangers.

Abstract: A condenser (2), an electronic expansion valve (5), an evaporator (6), and a motorized suction throttle valve (8) are connected in series with a compressor. When a capacity is increased, the electronic expansion valve (5) is controlled to be in a throttling direction and the motorized suction throttle valve (8) is controlled to be in an unthrottling direction in association with the control of the electronic expansion valve (5), and when a capacity is decreased, the electronic expansion valve (5) is controlled to be in an unthrottling direction and the motorized suction throttle valve (8) is controlled to be in a throttling direction in association with the control of the electronic expansion valve (5). While a capacity control of a compressor by a throttle control is been carried out, such associated control is made between the electronic expansion valve (5) and the motorized suction throttle valve (8), realizing a fine temperature control in a refrigerating machine without hunting.

Abstract: A cooling apparatus includes a bypass provided to a path extending from a compressor to an expansion valve via a condenser, and a unit for controlling a ratio of a flow rate of a refrigerant of the path via the condenser to that of the bypass path, or a unit for varying an air volume of a fan of an outdoor unit for blowing the condenser so as to vary a capacity of the condenser. The degree of superheat of the refrigerant is measured at an exit of the evaporator, and an expansion valve is controlled in accordance with the measured degree of superheat.

Abstract: A multizone air conditioning system for cooling multiple zones by circulating refrigerant in a closed circuit through the system. The system includes control means for activating and deactivating at least one individual evaporator unit and means for retaining within the portion of the tubing of an individual evaporator unit, when and if it deactivated, an amount of refrigerant which is approximately equal to the amount of refrigerant in the individual evaporator unit when it is activated. As a result, the refrigerant in the system remains balanced regardless of whether individual evaporator units are activated or deactivated.

Abstract: Disclosed is a dual air-conditioner for cars comprising an electromagnetic valve disposed in a refrigerant passage immediately downstream an outlet of an auxiliary evaporator for controlling the cross-sectional area of the passage, and an internal pressure balancing type expansion valve disposed in the refrigerant passage immediately upstream an inlet of the auxiliary evaporator. The passage cross-sectional area is controlled by the electromagnetic valve to control the pressure prevailing in the refrigerant passage between the expansion valve and electromagnetic valve so that the opening of the expansion valve is varied to regulate the flow rate of the refrigerant flowing into the auxiliary evaporator to thereby control the temperature of blow-off cooled air from the auxiliary evaporator.