Abstract: A refrigeration system includes a generator, a power generation engine, a refrigerator, an electric power converter, an output control unit, and a characteristic estimation unit that estimates a refrigerator characteristic of a refrigerator according to an outside air temperature and a temperature of a cooling target space. The refrigeration system includes an output calculation unit that calculates a drive output as a target drive output that optimizes an energy efficiency of the entire system based on the refrigerator characteristic estimated by the characteristic estimation unit, an engine characteristic of the power generation engine, and a generator characteristic of the generator. Further, the output control unit controls the drive output to approach the target drive output calculated by the output calculation unit.

Abstract: A refrigeration device disposed in a refrigerated container for transportation includes an engine, a generator driven by the engine, an inverter configured to convert an electric power generated by the generator, an electric compressor, and a support member. The electric compressor is driven by the electric power converted by the inverter. The electric compressor constitutes a part of a vapor compression refrigeration cycle. The support member supports the engine, the generator, the inverter, and the electric compressor. The engine, the generator, and the electric compressor are located lower than a middle part of the support member in a vertical direction. The inverter is located lower than the generator in the vertical direction.

Abstract: A transport refrigeration system is configured to set a first path, a second path, a third path, and fourth path selectively. The first path connects compressors in series. In the first path, interior heat exchangers each serve as an evaporator. The second path connects the compressors in series. In the second path, the interior heat exchangers each serve as a condenser. The third path connects the compressors in parallel. In the third path, at least one of the interior heat exchangers serve as the evaporator and the rest of the interior heat exchangers serve as the condenser. The fourth path connects the compressors in parallel. In the fourth path, the interior heat exchangers each serve as the condenser.

Abstract: A refrigeration system includes a generator, a power generation engine, a refrigerator, an electric power converter, an output control unit, and a characteristic estimation unit that estimates a refrigerator characteristic of a refrigerator according to an outside air temperature and a temperature of a cooling target space. The refrigeration system includes an output calculation unit that calculates a drive output as a target drive output that optimizes an energy efficiency of the entire system based on the refrigerator characteristic estimated by the characteristic estimation unit, an engine characteristic of the power generation engine, and a generator characteristic of the generator. Further, the output control unit controls the drive output to approach the target drive output calculated by the output calculation unit.

Abstract: A two-stage pressurizing refrigeration cycle is provide with a suction-side guiding portion in a part of a low-stage side suction pipe that leads from a bypass branch portion, at which a bypass pipe is branched, to a refrigerant suction side of a low-stage compressor. The suction-side guiding portion guides a lubricating oil from the refrigerant suction side of the low-stage side compressor to a side of the bypass branch portion. The suction-side guiding portion is located at a position in a vertical direction that is equal to or higher than apposition in the vertical direction of the bypass branch portion, and a part of the suction-side guiding portion on the refrigerant suction side of the low-stage side compressor is located at a higher position in the vertical direction than a part of the suction-side guiding portion on the side of the bypass branch portion.

Abstract: A transport refrigeration system is configured to set a first path, a second path, a third path, and fourth path selectively. The first path connects compressors in series. In the first path, interior heat exchangers each serve as an evaporator. The second path connects the compressors in series. In the second path, the interior heat exchangers each serve as a condenser. The third path connects the compressors in parallel. In the third path, at least one of the interior heat exchangers serve as the evaporator and the rest of the interior heat exchangers serve as the condenser. The fourth path connects the compressors in parallel. In the fourth path, the interior heat exchangers each serve as the condenser.

Abstract: A two-stage pressurizing refrigeration cycle is provided with a suction-side guiding portion in a part of a low-stage side suction pipe that leads from a bypass branch portion, at which a bypass pipe is branched, to a refrigerant suction side of a low-stage side compressor. The suction-side guiding portion guides a lubricating oil from the refrigerant suction side of the low-stage side compressor to a side of the bypass branch portion. The suction-side guiding portion is located at a position in a vertical direction that is equal to or higher than a position in the vertical direction of the bypass branch portion, and a part of the suction-side guiding portion on the refrigerant suction side of the low-stage side compressor is located at a higher position in the vertical direction than a part of the suction-side guiding portion on the side of the bypass branch portion.

Abstract: The system for using a communication terminal has a portable telephone user having a portable telephone, and a vehicle-mounted system is provided in a shared vehicle. In the portable telephone, an NFC is provided, and the vehicle-mounted system in the shared vehicle, an R/W for NFC communication is provided. When communication is performed for a first communication time between the R/W for NFC communication and the NFC by holding up the portable telephone to the R/W for NFC communication provided in the shared vehicle, door locking is performed. In addition, when communication is performed for a second communication time, a usage finishing process is performed.

Abstract: In a two-stage compression refrigeration cycle device, a low-pressure side compression mechanism and a high-pressure side compression mechanism are intermittently operated to control such that the temperature of air blown into a freezer approaches a target temperature. Under the control, the high-pressure side compression mechanism is first stopped, and then the low-pressure side compression mechanism is stopped. Further, when a reference time has elapsed after driving the high-pressure side compression mechanism, then the low-pressure side compression mechanism is driven. The refrigeration cycle device can reduce a high-pressure side pressure difference upon driving the high-pressure side compression mechanism, and can also reduce a low-pressure side pressure difference upon driving the low-pressure side compression mechanism.

Abstract: An object of the invention is to provide an electronic key system for a vehicle capable of accurately detecting that an electronic key has been taken out of a host vehicle. An electronic key system for a vehicle according to the invention which allows the start of a host vehicle when an electronic key of the host vehicle is authenticated includes electronic key information acquisition means for acquiring information relating to the position of the electronic key, taking-out detection means for detecting that the electronic key has been taken out of the host vehicle on the basis of the information relating to the position of the electronic key acquired by the electronic key information acquisition means, and alarm means for providing a warning to notify that the electronic key has been taken out of the host vehicle.

Abstract: The system for using a communication terminal has a portable telephone user having a portable telephone, and a vehicle-mounted system is provided in a shared vehicle. In the portable telephone, an NFC is provided, and the vehicle-mounted system in the shared vehicle, an R/W for NFC communication is provided. When communication is performed for a first communication time between the R/W for NFC communication and the NFC by holding up the portable telephone to the R/W for NFC communication provided in the shared vehicle, door locking is performed. In addition, when communication is performed for a second communication time, a usage finishing process is performed.

Abstract: An object of the invention is to provide an electronic key system for a vehicle capable of accurately detecting that an electronic key has been taken out of a host vehicle. An electronic key system for a vehicle according to the invention which allows the start of a host vehicle when an electronic key of the host vehicle is authenticated includes electronic key information acquisition means for acquiring information relating to the position of the electronic key, taking-out detection means for detecting that the electronic key has been taken out of the host vehicle on the basis of the information relating to the position of the electronic key acquired by the electronic key information acquisition means, and alarm means for providing a warning to notify that the electronic key has been taken out of the host vehicle.

Abstract: In a two-stage compression refrigeration cycle device, a low-pressure side compression mechanism and a high-pressure side compression mechanism are intermittently operated to control such that the temperature of air blown into a freezer approaches a target temperature. Under the control, the high-pressure side compression mechanism is first stopped, and then the low-pressure side compression mechanism is stopped. Further, when a reference time has elapsed after driving the high-pressure side compression mechanism, then the low-pressure side compression mechanism is driven. The refrigeration cycle device can reduce a high-pressure side pressure difference upon driving the high-pressure side compression mechanism, and can also reduce a low-pressure side pressure difference upon driving the low-pressure side compression mechanism, thereby protecting both compression mechanisms.

Abstract: A refrigerant discharge capacity of a high-pressure side compression mechanism and a refrigerant discharge capacity of a low-pressure side compression mechanism can be independently controlled, in a two-stage pressurizing refrigeration cycle device. The refrigerant discharge capacity of the low-pressure side compression mechanism is determined based on an outside air temperature, an air temperature at the evaporator, and a preset temperature. Furthermore, the refrigerant discharge capacity of the high-pressure side compression mechanism is determined based on the determined refrigerant discharge capacity of the low-pressure side compression mechanism such that an effective capacity ratio is not less than 1 nor more than 3. Therefore, in the two-stage pressurizing refrigeration cycle device, COP can be improved with a simple structure and control.

Abstract: A vehicular biometric authentication system is equipped with a portable terminal that includes a receiver that receives authentication data output from a data management center, and an on-board device that acquires the authentication data via the portable terminal and uses the acquired authentication data to carry out identity verification when communication with the management center is impossible. When a vehicle is stopped outside the communication range of the data management center, the on-board device acquires via the portable terminal the authentication data output from the data management center. Thus, the on-board device utilizes the authentication data acquired via the portable terminal to carry out identity verification.