Abstract: An air purifying apparatus including a water tank, a first tank part, a second tank part, a water purification filter part, a first pumping part installed on a first connection line connecting the water tank and the first tank part, a second pumping part connected to the first tank part by a second connection line, filters external air, a third pumping part installed in a third connection line connecting the first tank part and the water purification filter part, a fourth pumping part installed in a fourth connection line connecting the water purification filter part and the water tank, and a fifth pumping part connected to the second tank part by a fifth connection line and pumps the air moved upward to an uppermost layer of the second auxiliary space to an outside of the second tank part.

Abstract: A water heater includes a tank device including a tank that extends in an up-down direction and stores a fluid therein and a heating device that heats the outside of the tank to heat the fluid in the tank. One direction crossing the up-down direction is referred to as a reference direction, and the heating device includes a compressor that is located in the reference direction with respect to a lower side of the tank and that compresses a refrigerant, a condenser that has an upper end portion connected with the compressor, has a shape surrounding an outer peripheral surface of the tank, and condenses the refrigerant released from the compressor, an expansion valve that is connected with a lower end portion of the condenser and that expands the refrigerant released from the condenser, and an evaporator that heats the refrigerant passing through the expansion valve.

Abstract: A semiconductor device includes a first substrate having a first surface and a second opposite surface, a first lower interlayer insulating layer on the second surface, a first active pattern including a first lower pattern contacting the first surface, a plurality of first sheet patterns spaced apart from the first lower pattern in a second direction, a first gate structure on the first lower pattern, a first source/drain pattern on a side of the first gate structure, a second lower interlayer insulating layer including a third surface and a fourth opposite surface, a second active pattern including a second lower pattern contacting the third surface, a plurality of second sheet patterns spaced apart from the second lower pattern in the second direction, a second gate structure on the second lower pattern, wherein the first lower pattern has a first height, and the second lower pattern has a second different height.

Abstract: A semiconductor device includes a back interlayer insulating film, a back wiring line in the back interlayer insulating film, a fin-shaped pattern on a first surface of the back wiring line, a field insulating film disposed on the fin-shaped pattern, a source/drain pattern on the fin-shaped pattern, a source/drain contact disposed on the source/drain pattern and connected to the source/drain pattern and a contact connecting via connecting the back wiring line and the source/drain contact, and is in contact with the back wiring line. The contact connecting via includes a first surface connected to the source/drain contact, and a second surface contacted to the back wiring line. A height from a second surface of the back wiring line to an upper surface of the field insulating film is smaller than a height from the second surface of the back wiring line to the first surface of the contact connecting via.

Abstract: The present invention relates to a fuel cell system comprising: a fuel cell configured to generate electricity and heat by a reaction between hydrogen and oxygen; a heat storage tank provided therein with a storage heat exchange unit configured to perform heat exchange between the heat recovered from the fuel cell and a fluid contained in the heat storage tank; a heat media supply line and a heat media recovery line configured to interconnect the fuel cell and the storage heat exchange unit to form a circulation flow channel of heat media; a bypass line branched from the heat media supply line and connected to the heat media recovery line; a flow channel switching device configured to selectively switch the flow channel of the heat media flowing along the heat media supply line to the storage heat exchange unit or the bypass line; and a controller configured to control the flow channel switching device such that the flow channel of the heat media flowing along the heat media supply line is connected to the st

Abstract: There is provided a system including: an automatic supplement valve configured to automatically supplementing direct water; an expansion tank configured to be connected to the automatic supplement valve to adjust expansion pressure depending on the temperature change of the direct water; an exhaust heat pump configured to be connected to the expansion tank to circulate heat in an exhaust heat line connecting the exhaust heat source and the hot water tank; and a mixing valve configured to be extendedly formed between a first hot water line for receiving the exhaust heat of the exhaust heat source and a second hot water line having passed through the exhaust heat exchanger of the hot water tank to mix the first hot water with the second hot water.

Abstract: There is provided a system including: an automatic supplement valve configured to automatically supplementing direct water; an expansion tank configured to be connected to the automatic supplement valve to adjust expansion pressure depending on the temperature change of the direct water; an exhaust heat pump configured to be connected to the expansion tank to circulate heat in an exhaust heat line connecting the exhaust heat source and the hot water tank; and a mixing valve configured to be extendedly formed between a first hot water (1H) line for receiving the exhaust heat of the exhaust heat source and a second hot water (2H) line having passed through the exhaust heat exchanger of the hot water tank to mix the first hot water (1H) with the second hot water (2H).

Abstract: The present invention relates to a structure for controlling a temperature of hot-water supply from a waste heat recovery system, and more particularly, to a structure for controlling a temperature of hot-water supply from a waste heat recovery system using a three-way valve capable of stably supplying hot water at a hot-water supply setting temperature during hot-water supply use using the three-way valve and saving energy to improve system efficiency, in a waste heat recovery system recycling waste heat.