Abstract: An ice rink cooling facility 100 in which a cooling-pipe bank 1 having a plurality of cooling pipes 11 is arranged at the bottom part of the ice rink 10 and CO2 brine streams through the cooling pipe bank 1 so as to cool the ice rink 10, the ice rink cooling facility 100 including, but not limited to: at least one planar heat conduction member that is arranged on and over the cooling pipes 11; a CO2 circulation circuit 3 that is connected to the cooling pipes 11 so that the CO2 brine circulates in the CO2 circulation circuit 3; an ammonia refrigerating cycle in which an ammonia refrigerant circulates; and, a cascade condenser 211 in which the heat exchange is performed between the CO2 brine and the ammonia refrigerant so that the CO2 brine is cooled and re-liquefied by use of the ammonia refrigerant.

Abstract: An ice rink cooling facility 100 in which a cooling-pipe bank 1 having a plurality of cooling pipes 11 is arranged at the bottom part of the ice rink 10 and CO2 brine streams through the cooling pipe bank 1 so as to cool the ice rink 10, the ice rink cooling facility 100 including, but not limited to: at least one planar heat conduction member that is arranged on and over the cooling pipes 11; a CO2 circulation circuit 3 that is connected to the cooling pipes 11 so that the CO2 brine circulates in the CO2 circulation circuit 3; an ammonia refrigerating cycle in which an ammonia refrigerant circulates; and, a cascade condenser 211 in which the heat exchange is performed between the CO2 brine and the ammonia refrigerant so that the CO2 brine is cooled and re-liquefied by use of the ammonia refrigerant.

Abstract: A vehicle security device for improving the security level of a vehicle. The vehicle security device is connected to an engine and communicates with a portable device. A smart ECU performs a first coded communication to establish mutual authentication with the portable device. An ID code box is connected to the smart ECU, has a first code and a second code, and does not communicate with the portable device. The ID code box performs a second coded communication using the first code to establish a second mutual authentication with the smart ECU. An engine ECU performs a third coded communication using the second code to establish a third mutual authentication with the ID code box. The engine ECU enables the engine to be started when every one of the first, second, and third mutual authentications are established.

Abstract: An engine switch device with improved convenience. The device starts and stops an engine. The device includes a key cylinder, which has a key slot, and a push button switch, which is pushed to stop or start the engine. The key slot is located in the center of the push button in a preferred embodiment.

Abstract: A vehicle security device for improving the security level of a vehicle. The vehicle security device is connected to an engine and communicates with a portable device. A smart ECU performs a first coded communication to establish mutual authentication with the portable device. An ID code box is connected to the smart ECU, has a first code and a second code, and does not communicate with the portable device. The ID code box performs a second coded communication using the first code to establish a second mutual authentication with the smart ECU. An engine ECU performs a third coded communication using the second code to establish a third mutual authentication with the ID code box. The engine ECU enables the engine to be started when every one of the first, second, and third mutual authentications are established.

Abstract: An engine starting controller for a vehicle provided with a smart ignition function. The controller communicates with a portable communicator including an emergency key. When the battery of the portable communicator is drained, the emergency key is used to open the door lock and start the engine. A seat for depositing the emergency key is provided in the passenger compartment. The starting of the engine is enabled when the emergency key is deposited on the seat. The seat is illuminated or moved to notify the driver where to deposit the key.

Abstract: An engine starting controller for a vehicle provided with a smart ignition function. The controller communicates with a portable communicator including an emergency key. When the battery of the portable communicator is drained, the emergency key is used to open the door lock and start the engine. A seat for depositing the emergency key is provided in the passenger compartment. The starting of the engine is enabled when the emergency key is deposited on the seat. The seat is illuminated or moved to notify the driver where to deposit the key.

Abstract: A holder coil spring is located between an inner surface of a bottom of a case main body and a bottom outer surface of a shutter holder. A shutter coil spring is located between a bottom inner surface of the shutter holder and a shutter. In each sidewall of the shutter holder, a tactile feedback piece and a locking piece are provided. The tactile feedback piece holds the shutter holder at the case main body. The locking piece locks an electronic key in the shutter holder. Even if an object other than the electronic key (for example, a finger) is inserted in the slot, the object is not locked in the shutter holder. When the object other than the electronic key is pulled out of the slot, the shutter holder and the shutter return to original positions to close the slot. Therefore, when no object is inserted, the slot of the slot mechanism is reliably closed with the shutter.

Abstract: An engine switch device with improved convenience. The device starts and stops an engine. The device includes a key cylinder, which has a key slot, and a push button switch, which is pushed to stop or start the engine. The key slot is located in the center of the push button in a preferred embodiment.

Abstract: A holder coil spring is located between an inner surface of a bottom of a case main body and a bottom outer surface of a shutter holder. A shutter coil spring is located between a bottom inner surface of the shutter holder and a shutter. In each sidewall of the shutter holder, a tactile feedback piece and a locking piece are provided. The tactile feedback piece holds the shutter holder at the case main body. The locking piece locks an electronic key in the shutter holder. Even if an object other than the electronic key (for example, a finger) is inserted in the slot, the object is not locked in the shutter holder. When the object other than the electronic key is pulled out of the slot, the shutter holder and the shutter return to original positions to close the slot. Therefore, when no object is inserted, the slot of the slot mechanism is reliably closed with the shutter.