Provided is a heat pump device capable of discharging air in a heat medium circuit regardless of the height of the positions of two bodies, and capable of preventing a refrigerant from flowing out into a body not housing a liquid heat exchanger when the refrigerant enters the heat medium circuit in the liquid heat exchanger. To achieve this, the heat pump device includes: a refrigerant pipe connecting a compressor, a decompressor, an air heat exchanger, and a liquid heat exchanger circularly; a heat medium pipe connecting the liquid heat exchanger and a pump circularly; first and second air vent valves capable of discharging gas in the heat medium pipe to the outside; a first body housing the compressor, the decompressor, the air heat exchanger, the liquid heat exchanger, the refrigerant pipe, and the first air vent valve; and a second body housing the second air vent valve. The pump causes the liquid heat medium to flow in a predetermined circulatory direction in the heat medium pipe, and the liquid heat exchanger, the first air vent valve, and the second air vent valve are arranged in this order along the circulatory direction.

A gas heat-pump system is provided. The gas heat-pump system may include an air-conditioning system including at least one compressor, an outdoor heat exchanger, an expander, an indoor heat exchanger, and a refrigerant pipe; an engine configured to provide power for an operation of the at least one compressor, and in which a mixed fuel, in which a fuel and air are mixed, is burned; a cooling water pump which pumps a flow of cooling water that cools the engine; a cooling water pipe connected to the cooling water pump, and configured to guide the flow of the cooling water; an auxiliary heat exchanger in which heat exchange between the cooling water flowing through the cooling water pipe and a refrigerant flowing through the refrigerant pipe is performed; a hot water heat exchanger, in which heat exchange between the cooling water flowing through the cooling water pipe and a fluid supplied from a hot water supply tank is performed; and a plurality of flow switches installed at the cooling water pipe, and controlled so that the cooling water discharged from the engine is guided to the auxiliary heat exchanger or the hot water heat exchanger.

A gas heat-pump system is provided. The gas heat-pump system may include an air-conditioning system including at least one compressor, an outdoor heat exchanger, an expander, an indoor heat exchanger, and a refrigerant pipe; an engine configured to provide power for an operation of the at least one compressor, and in which a mixed fuel, in which a fuel and air are mixed, is burned; a cooling water pump which pumps a flow of cooling water that cools the engine; a cooling water pipe connected to the cooling water pump, and configured to guide the flow of the cooling water; an auxiliary heat exchanger in which heat exchange between the cooling water flowing through the cooling water pipe and a refrigerant flowing through the refrigerant pipe is performed; a hot water heat exchanger, in which heat exchange between the cooling water flowing through the cooling water pipe and a fluid supplied from a hot water supply tank is performed; and a plurality of flow switches installed at the cooling water pipe, and controlled so that the cooling water discharged from the engine is guided to the auxiliary heat exchanger or the hot water heat exchanger.

A heat pump includes an evaporator with an evaporator inlet and an evaporator outlet; a compressor for compressing operating liquid evaporated in the evaporator; and a condenser for condensing evaporated operating liquid compressed in the compressor, wherein the condenser includes a condenser inlet and a condenser outlet, wherein the evaporator inlet is connected to a return from a region to be heated, and wherein the condenser inlet is connected to a return from a region to be cooled.

An absorption cycle system, which permits water heating, dehumidifying, and/or evaporative cooling, includes a desorber, absorber, heat exchanger, and, optionally, an evaporator, is constructed to heat a process water that is plumbed through the absorber, heat exchanger, and condenser. In the absence or isolation of the evaporator, the system can dehumidify ambient air to the absorber. The water vapor released by evaporative cooling at the evaporator can be provided to the absorber in a controlled manner to simultaneously maintain a desired humidity while cooling the air ambient by the evaporator. The absorption cycle system can be housed within a single unit or can be compartmentalized.

An absorption cycle system, which permits water heating, dehumidifying, and/or evaporative cooling, includes a desorber, absorber, heat exchanger, and, optionally, an evaporator, is constructed to heat a process water that is plumbed through the absorber, heat exchanger, and condenser. In the absence or isolation of the evaporator, the system can dehumidify ambient air to the absorber. The water vapor released by evaporative cooling at the evaporator can be provided to the absorber in a controlled manner to simultaneously maintain a desired humidity while cooling the air ambient by the evaporator. The absorption cycle system can be housed within a single unit or can be compartmentalized.

An embodiment includes an air conditioner, including: a housing including an ambient side and an enclosure side, where the enclosure side faces an enclosure to be cooled by the air conditioner; the ambient side including an interface that fits in a flush-mounted configuration with respect to a wall of the enclosure to be cooled, whereby the entire air conditioner is disposed within the enclosure. Other embodiments are described and claimed.

A system for killing pests in an affected area of a structure comprises a heat exchanger unit placed within an affected area, and a thermostatic control. The heat exchanger unit is configured to receive a flow of water from a faucet, and generate heated air by transferring heat from the flow of water received from the faucet to air flowing through the heat exchanger unit. The thermostatic control is configured to monitor a temperature of the flow of water as it is received by the heat exchanger unit, monitor a temperature of the air as it is received at an inlet of the heat exchanger unit, and automatically cease the flow of water to the heat exchanger unit when the temperature of the air received by the heat exchanger unit is greater than the temperature of the flow of water.

A heat pump includes an evaporator with an evaporator inlet and an evaporator outlet; a compressor for compressing operating liquid evaporated in the evaporator; and a condenser for condensing evaporated operating liquid compressed in the compressor, wherein the condenser includes a condenser inlet and a condenser outlet, wherein the evaporator inlet is connected to a return from a region to be heated, and wherein the condenser inlet is connected to a return from a region to be cooled.

A lower structure for a hybrid automobile in which a high-voltage battery is disposed in a lower surface of a floor panel includes an engine exhaust system component which is disposed in front of the high-voltage battery in the lower surface of the floor panel and on one vehicle-width-direction side of a center in a vehicle width direction and high-voltage devices which are disposed in front of the high-voltage battery and on another vehicle-width-direction side of the center in the vehicle width direction. In-vehicle equipment is disposed between the high-voltage battery and the high-voltage devices, and the in-vehicle equipment is in an inclined state where an upper surface of the in-vehicle equipment is inclined in a front-rear direction such that the in-vehicle equipment has a shorter dimension in the front-rear direction than a dimension in a horizontal state where the upper surface becomes horizontal.