Abstract: A compressor comprising a hermetical container, a compression mechanism disposed in a lower portion in the hermetical container, a rotational motor disposed in an upper portion in the hermetical container and having a stator and a rotor, coil ends provided on upper end lower ends of the stator, a discharge pipe provided on an upper end of the hermetical container, and an oil reservoir provided in a lower portion in the hermetical container, in which working fluid compressed by the compression mechanism is introduced into an upper space of the hermetical container from a gap between the rotational motor and the hermetical container, and the working fluid is discharged out from the hermetical container through the discharge pipe, wherein an open end in the hermetical container of the discharge pipe is located inside the upper end coil end.

Abstract: The present invention realizes a reliable heat pump apparatus and heat pump apparatus having high recovering efficiency. The heat pump apparatus includes an expander 711 for expanding working fluid, a permanent magnet type synchronization power generator 710 which is disposed for recovering power by the expander 711 and which generates three phase AC power, and a first converter 708 which converts the AC power to DC power, and which rotates the power generator 710 at a predetermined target number of revolutions by switching of a switching element group 709. The generated electricity is consumed by connection of an AC power supply 701 to a DC power line which is rectified and smoothened by a rectifier circuit 702 and a smoothing capacitor 703, and by driving of an electric motor 706 which rotates a compressor 707 through a motor drive apparatus 704, and the power is efficiently recovered.

Abstract: A cylinder 2, a roller 4, an upper bearing member 7 and a lower bearing member 8 form a space, the space is partitioned by a vane 5 into working chambers 12. Working fluid is sucked into the working chamber 12 through a suction hole 7c, the working fluid is expanded in the working chamber 12 whose volume is varied by rotation, and the working fluid is discharged from a discharge hole 2b into a discharge space 20. A differential pressure regulating valve 21 which is opened when pressure in the working chamber 12 is higher than pressure in the discharge space 20 is provided in the discharge hole 2b. With this, repressing can be carried out even if excessive expansion of working fluid is generated. Therefore, excessive expansion loss can be prevented.

Abstract: It has been difficult to operate a drying apparatus in a stable and high-efficiency state where a superheat value is changed in a drying process. A drying apparatus includes: a first temperature sensor 38 which detects the temperature of a refrigerant between the outlet of an evaporator 34 and the inlet of a compressor 31; and control means 14 for controlling a superheat value by changing flow resistance of an expansion valve 33 based on a detected value of the first temperature sensor 38. The control means 14 controls the superheat value in the drying process to become a target value.

Abstract: A drying apparatus comprising a heat pump apparatus in which a refrigerant circulates through a compressor, a radiator, a throttle apparatus and an evaporator in this order, in which air heated by the radiator is introduced into a dry chamber, the air coming out from the dry chamber is cooled by a cooling apparatus, the air cooled by the cooling apparatus is dehumidified by the evaporator, and the air dehumidified by the evaporator is again heated by the radiator, wherein the drying apparatus further comprises compressor input detecting means for detecting input of the compressor, and cooling quantity control means for controlling a cooling quantity of the cooling apparatus using a value detected by the compressor input detecting means.

Abstract: A plurality of vertically standing plates are assembled in a lattice form to a divided member 101 as a floating type wave-suppressing members. The divided member 101 is allowed to float in an interface 24 between working fluid and refrigeration oil of an oil reservoir 21. The interface 24 is prevented from rippling by turning flow, oil drops torn from the interface 24 by the turning flow is reduced, and oil drops of the refrigeration oil are prevented from being supplied from the interface 24 to the working fluid.

Abstract: A drying apparatus has a heat pump comprising a compressor (31), a radiator (32), a throttle apparatus (33) and an evaporator (34), and also includes a structure in which drying air heated by heat of the radiator (32) is introduced to a subject (37) to be dried is dehumidified by the evaporator (34). The drying apparatus also includes a bypass circuit (39) through which a portion of dying air heated by the radiator (32) flows to an inlet of the evaporator (34) without coming into contact with the subject, a super heat detecting device (43, 44) for detecting super heat of the heat pump apparatus, and a throttle apparatus control device for controlling flow path resistance in the bypass circuit (39) using a value detected by the super heat detecting device (43, 44).

Abstract: An air conditioner for a vehicle includes a refrigerant cycle having an evaporator which is disposed in a blowing duct and cools air by refrigerant evaporation in the blowing duct; a compressor setting the evaporated refrigerant at a high temperature and high pressure; a refrigerant-to-water heat exchanger heating cooling water by heat transfer from the refrigerant discharged from the compressor; and an expansion device decompressing the refrigerant discharged from the refrigerant-to-water heat exchanger. The air conditioner also includes a cooling water cycle having a heater core which is disposed on the downstream side of the evaporator; a radiator cooling the cooling water; a pump circulating the cooling water cooled by the radiator; a power engine cooled by the cooling water fed by the pump; and the refrigerant-to-water heat exchanger. The refrigerant cycle performs cooling for dehumidification by performing the operation of heating.

Abstract: A projection of an upper bearing member is provided with a porous member, and a lower space between a rotational motor and a compression mechanism is defined into a lower compression mechanism-side space and a lower rotational motor-side space. With this structure, stirring effect of working fluid flowing in the lower compression mechanism-side space caused by rotation of the rotor is suppressed, and oil drops mixed in the working fluid are prevented from being finely divided by the stirring effect, the oil drops are allowed to fall due to the gravity in the lower compression mechanism-side space, and oil separating effect from the working fluid is enhanced.

Abstract: To prevent heat transfer inhibition and an increase in pressure loss due to refrigerating machine oil discharged into a cycle, and to provide a compact and highly efficient refrigerating cycle apparatus using carbon dioxide gas (CO2).

Abstract: An air conditioner for a vehicle includes a refrigerant cycle having an evaporator which is disposed in a blowing duct and cools air by refrigerant evaporation in the blowing duct; a compressor setting the evaporated refrigerant at a high temperature and high pressure; a refrigerant-to-water heat exchanger heating cooling water by heat transfer from the refrigerant discharged from the compressor; and an expansion device decompressing the refrigerant discharged from the refrigerant-to-water heat exchanger, The air conditioner also includes a cooling water cycle having a heater core which is disposed on the downstream side of the evaporator; a radiator cooling the cooling water; a pump circulating the cooling water cooled by the radiator; a power engine cooled by the cooling water fed by the pump; and the refrigerant-to-water heat exchanger. The refrigerant cycle performs cooling for dehumidification by performing the operation of heating.

Abstract: A drying apparatus comprising a heat pump apparatus in which a refrigerant circulates through a compressor, a radiator, a throttle apparatus and an evaporator in this order, in which air heated by the radiator is introduced into a dry chamber, the air coming out from the dry chamber is cooled by a cooling apparatus, the air cooled by the cooling apparatus is dehumidified by the evaporator, and the air dehumidified by the evaporator is again heated by the radiator, wherein the drying apparatus further comprises compressor input detecting means for detecting input of the compressor, and cooling quantity control means for controlling a cooling quantity of the cooling apparatus using a value detected by the compressor input detecting means.

Abstract: A rotary compressor includes a coil spring to press a vane against a roller, and the contact area between the vane and a vane groove is secured by a simple and inexpensive construction, whereby the compressor size is decreased while the leakage of working fluid is restrained. The rotary compressor includes a closed vessel, a cylinder having a vane groove, which is located in the closed vessel, and a shaft having an eccentric portion. A roller is rotatably fitted on the eccentric portion of the shaft to eccentrically rotate in the cylinder. A vane is provided in the vane groove in the cylinder to reciprocate in the vane groove while a tip end thereof is in contact with the roller, and the coil spring is provided for pressing the vane against the roller. The vane is provided with a spring hole on the side opposite to the side on which the vane is in contact with the roller, and the spring hole contains at least a part of the coil spring.

Abstract: A scroll compressor comprises a compression mechanism 4, a main shaft 5 for driving the compression mechanism 4, a motor 7 for rotating the main shaft 5, and a journal bearing 20 for supporting the main shaft 5, the journal bearing 20 is provided at its end with an annular groove 21, thereby forming an annular portion 22 on an inner peripheral side of the annular groove 21, a ratio of a groove depth of the annular groove 21 to a diameter of the main shaft 5 is in a range of 0.15 to 0.34, and a ratio of a thickness of the annular portion 22 to the diameter of the main shaft 5 is in a range of 0.09 to 0.19, with this configuration, it is possible to provide the efficient scroll compressor with a simple structure in which even when the main shaft 5 is bent or deformed by a radial force of a compression load, damage such as wearing and seizing of the journal bearing which pivotally supports the main shaft 5 is prevented, and performance is not deteriorated in a wide operation range.

Abstract: A drying apparatus has a heat pump apparatus having a compressor, a radiator, an expansion mechanism and an evaporator connected in this order via pipes through which a refrigerant is circulated. The drying apparatus has a structure in which drying air heated in the radiator is introduced into a subject to be dried, drying air obtained by removing moisture or water from the subject to be dried is cooled and dehumidified by the evaporator, and then the drying air is reheated in the radiator to be reused as renewed drying air. The drying apparatus also has a structure in which drain water generated by dehumidifying the drying air in the evaporator is dropped or sprayed into the radiator.

Abstract: A high-efficiency vane rotary expander is provided, which prevents a loss due to incomplete expansion or overexpansion from occurring because the volume of an operating chamber may vary. This is done by forming a plurality of discharge ports (28, 29, 48, 49, 50) in an inner wall (21a, 41a) of a cylinder in the circumferential direction, placing, among these discharge ports, the discharge port (28, 48), to which the operating chamber (25, 45) connects at the initial stage of the discharging process, at a position of {180×(1+1/n)} degrees from a small clearance (22, 42) defined between the cylinder (21, 41) and the rotor (23, 43) in the direction where a shaft rotates, and providing a valve mechanism (30a, 30b, 51a, 51b, 52a, 52b).

Abstract: The present specification discloses a compressor characterized in that a nonpolar solvent is used as a working fluid and an insulation part of a rotating section is formed from a low dielectric constant plastic film having a specific dielectric constant of 1.2 to 3.0. This compressor has been reduced in leakage current and improved in safety and reliability, and therefore can realize energy savings for devices such as a refrigerant system device.

Abstract: Refrigeration-cycle equipment wherein an oil separator is installed as a refrigerant vessel in a part of the high-pressure-side circuit. A linear compressor of an oil-less type or an oil-poor type is used. Alternatively, the quantity of the CO2 refrigerant filled in the circuit is 0.25 kg or less per liter on the basis of the total internal volume of the circuit.

Abstract: In a refrigerating cycle device using carbon dioxide as a refrigerant, there exists a problem that the provision of a receiver at a low-pressure side increases cost and volume due to a pressure resistance design necessary for ensuring safety. By adjusting a refrigerant holding quantity of a first heat exchanger in such a manner that a refrigerant pressure of the first heat exchanger 13 is changed by operating a first decompressor 12 and a second decompressor 15, an imbalance of a refrigerant quantity between time for space cooling and time for heating or dehumidifying can be alleviated and hence, it is possible to perform an operation of the refrigerating cycle device with high efficiency with a miniaturized receiver or without providing the receiver.

Abstract: To provide a refrigerating cycle apparatus which uses carbon dioxide as a working medium, in which a problem associated with reliability arisen from introduction of water into a refrigeration cycle has been solved. Carbonic acid produced by a reaction of carbon dioxide or a mixed refrigerant including carbon dioxide and water is efficiently removed by providing a flow channel of the refrigeration cycle with a carbonic acid trapping agent, and consequently, the refrigerating cycle apparatus with high reliability which can prevent deterioration of a carbon dioxide refrigerant, decomposition of a refrigeration oil, corrosion of metal components or the like is constructed.