Abstract: A hydrogen supply method includes a two-side heat exchange mode in which both introducing a second fluid into a hydrogen storage part after the second fluid exchanges heat with a first fluid in a second heat exchanger in a state in which a compressor is driven to compress the first fluid and introducing the second fluid into the hydrogen storage part after the second fluid is heated or cooled in a thermal device are performed. The method also includes a one-side heat exchange mode in which one of introducing the second fluid into the hydrogen storage part after the second fluid exchanges heat with the first fluid in the second heat exchanger in a state in which the compressor is driven to compress the first fluid and introducing the second fluid into the hydrogen storage part after the second fluid is heated or cooled in the thermal device is performed.

Abstract: An embodiment multi-way coolant valve includes an outer housing including first to third outer inlets, first to third outer outlets, and a pump mount portion coupled to one of the outer outlets, an inner housing rotatably provided within the outer housing and including penetration holes corresponding to the outer inlets and outlets, a coolant line defined by a selective connection of the penetration holes such that the outer inlets and outlets are selectively connected, pads interposed between an interior circumference of the outer housing and an exterior circumference of the inner housing at locations of the outer inlets and outlets, respectively, and a driving device connected to a rotation center of the inner housing to selectively rotate the inner housing within the outer housing, wherein the inner housing is configured to rotate by a preset interval according to a selected vehicle mode.

Abstract: A heat pump system includes a cooling apparatus in which a coolant is circulated, a compressor to compress a refrigerant, a condenser connected to the compressor through a refrigerant line and configured to condense the refrigerant by heat-exchanging with the refrigerant and the coolant, an evaporator connected to the condenser through the refrigerant line and configured to evaporate the refrigerant by heat-exchanging with the refrigerant and the coolant, a gas injection device provided in the refrigerant line between the condenser and the evaporator and configured to selectively expand and flow the refrigerant and selectively supply some of the refrigerant to the compressor, a refrigerant connection line including a first end connected to the refrigerant line and a second end connected to the gas injection device between the compressor and the evaporator, and a chiller in the refrigerant connection line for adjusting a temperature of the coolant by heat-exchange.

Abstract: The present invention relates to a shin guard, and in particular to a shin guard which is well adapted irrespective of a body shape of a user based on a flexible construction and is capable of implementing a good ventilation and an easier sweat exhaust. The shin guard according to the present invention includes a plate shaped smooth synthetic resin cover in which a plurality of mesh ventilation holes are formed in the whole surfaces of the cover, said cover being curved for thereby being well stuck to a shin of a user, and a foam synthetic resin buffering plate which is attached to a back surface of the cover and includes a plurality of ventilation holes corresponding to the mesh ventilation holes formed in the cover and a plurality of protrusions in the back surface of the same for thereby implementing a good ventilation through each ventilation hole.

Abstract: The present invention relates to a shin guard, and in particular to a shin guard which is well adapted irrespective of a body shape of a user based on a flexible construction and is capable of implementing a good ventilation and an easier sweat exhaust. The shin guard according to the present invention includes a plate shaped smooth synthetic resin cover in which a plurality of mesh ventilation holes are formed in the whole surfaces of the cover, said cover being curved for thereby being well stuck to a shin of a user, and a foam synthetic resin buffering plate which is attached to a back surface of the cover and includes a plurality of ventilation holes corresponding to the mesh ventilation holes formed in the cover and a plurality of protrusions in the back surface of the same for thereby implementing a good ventilation through each ventilation hole.