Abstract: The present invention provides a cold-storage instantaneous heat pump water heater (HPWH). The HPWH includes a cold-water tank, a main evaporator, a compressor, and a hot water heat exchanger. In the present invention, heat of a working medium in the cold-water tank is absorbed by the main evaporator, and bathing water is rapidly heated by the hot water heat exchanger (condenser of the heat pump), thereby realizing instant heating with small input electrical power. Cold-water tank replaces the hot water tank of conventional HPWH avoiding energy loss during hot water storage. The working medium in the cold-water tank absorbs heat from the environment, to further improve energy utilization. In addition, there are three energy recovery evaporators to recover the waste heat of bathing.

Abstract: The present invention provides a cold-storage instantaneous heat pump water heater (HPWH). The HPWH includes a cold-water tank, a main evaporator, a compressor, and a hot water heat exchanger. In the present invention, heat of a working medium in the cold-water tank is absorbed by the main evaporator, and bathing water is rapidly heated by the hot water heat exchanger (condenser of the heat pump), thereby realizing instant heating with small input electrical power. Cold-water tank replaces the hot water tank of conventional HPWH avoiding energy loss during hot water storage. The working medium in the cold-water tank absorbs heat from the environment, to further improve energy utilization. In addition, there are three energy recovery evaporators to recover the waste heat of bathing.

Abstract: A passive direct liquid fuel cell is provided, which relates to a fuel cell field, including a current-collector-integrated fuel tank unit and a sealing-fastening-integrated current-collector which are prepared via a three-dimensional (3D) printing technology. The current-collector-integrated fuel tank unit is fastened with the sealing-fastening-integrated current-collector, and a membrane electrode assembly is sandwiched between the current-collector-integrated fuel tank unit and the sealing-fastening-integrated current-collector. Because of designs of current collectors, a fuel tank and a sealing fastening manner, an integration of the current collectors, the fuel tank and fasteners is realized. The current-collector-integrated fuel tank unit and the sealing-fastening-integrated current-collector are rapidly formed via the 3D printing technology, so that the whole fuel cell has a compact and simple structure, a lighter weight and a smaller volume.

Abstract: A passive direct liquid fuel cell is provided, which relates to a fuel cell field, including a current-collector-integrated fuel tank unit and a sealing-fastening-integrated current-collector which are prepared via a three-dimensional (3D) printing technology. The current-collector-integrated fuel tank unit is fastened with the sealing-fastening-integrated current-collector, and a membrane electrode assembly is sandwiched between the current-collector-integrated fuel tank unit and the sealing-fastening-integrated current-collector. Because of designs of current collectors, a fuel tank and a sealing fastening manner, an integration of the current collectors, the fuel tank and fasteners is realized. The current-collector-integrated fuel tank unit and the sealing-fastening-integrated current-collector are rapidly formed via the 3D printing technology, so that the whole fuel cell has a compact and simple structure, a lighter weight and a smaller volume.