Provided is an air conditioning apparatus. The air conditioning apparatus includes an outdoor unit through which a refrigerant circulates, a plurality of indoor units through which water circulates, the plurality of indoor units comprising a first indoor heat exchanger and a second indoor heat exchanger, and a heat-exchange device configured to connect the outdoor unit to the indoor unit, the heat exchange device including a first heat exchanger and a second heat exchanger, in which the refrigerant and water are heat exchanged with each other. The heat exchange device includes a first inflow tube extending from the first indoor heat exchanger toward the first heat exchanger to guide a flow of the water, a second inflow tube extending from the second indoor heat exchanger toward the second heat exchanger to guide the flow of the water, a first pump provided in the first inflow tube and a second pump provided in the second inflow tube. When a portion of the indoor unit performs a heating operation, and the other portion of the indoor unit performs a cooling operation, when a total capacity required for the indoor unit is equal to or less than a set capacity, the first pump or the second pump operates, and when the total capacity required for the indoor unit exceeds the set capacity, the first pump and the second pump operate.

A heat pump system and a method for operating this system type includes a heat pump circuit for a heat pump circuit medium flowing through a primary side of a heat exchanger, and a heating circuit for a heating circuit medium flowing through the heat exchanger secondary side. A heat circuit pump is connected upstream of the exchanger secondary side when viewed in the heating circuit medium operating flow direction. When viewed in the heating circuit medium operating flow direction, a check valve connected downstream of the heating circuit pump and upstream of the secondary side closes when a heating circuit medium flows opposite the operating flow direction, and a degassing unit connected downstream of the secondary side when viewed in the operating flow direction prevents a flow of the heating circuit medium in the operating flow direction from a predefined gas amount in the heating circuit medium.

A hydronic system includes a partition, a first conduit embedded in a first side of the partition, a second conduit embedded in a second side of the partition, a first sheet of finishing material covering the first conduit, a second sheet of finishing material covering the second conduit, and at least one valve and at least one pump. The at least one valve and at least one pump are configured to control a flow of a fluid inside the first conduit and the second conduit. When the hydronic system is operating in an isolating mode, the fluid flows in a first closed loop through the first conduit and the fluid flows in a second closed loop through the second conduit. When the hydronic system is operating in a heat exchange mode, the fluid flows between the first conduit and the second conduit in a third closed loop.

The present invention relates to a method for controlling one or more heat pumps (110) connected to a distribution grid (10) for fluid-based distribution of heating and cooling in order to, at least partly, compensate for a cold outtake from the distribution grid (10) by a first cooling machine (120) connected to the distribution grid (10). Alternatively, or in combination, one or more cooling machines (120) connected to the distribution grid (10) may be controlled in order to, at least partly, compensate for a heat outtake from the distribution grid (10) by a first heat pump (120) connected to the distribution grid (10). The controlling is made a control server (200) monitoring outtake of heat and/or cold from the distribution grid (10) by the heat pumps (110) and cooling machines (120) connected to the distribution grid (10). The control server (120) generates and sends out control messages to the heat pumps and/or cooling machines.

Disclosed are a carbon dioxide overlapping type heating system and a control method therefor. The heating system comprises a low-temperature stage loop, a high-temperature stage loop and a heat supply loop, wherein a low-temperature stage compressor (3) and a high-temperature stage compressor (7) are both variable-frequency compressors; and a water pump (10) is a variable-frequency water pump.

A composite refrigeration system includes a refrigeration part, a heat dissipation part, a first pipeline, a second pipeline, and a refrigerant. The refrigeration part uses the refrigerant to cool air sent into indoor space, and the heat dissipation part is configured to perform heat dissipation on the refrigerant. In addition, in two heat dissipation modes, the heat exchanger may exchange heat between the refrigerant and a heat carrier in an external pipeline network to implement heat dissipation. The composite refrigeration system implements, by using the heat exchanger, a function of exchanging heat with the external pipeline network, so that heat generated during operation of the composite refrigeration system can be at least partially transferred to the heat carrier in the external pipeline network, to implement the energy recycle and reuse.

When heating is being performed, and a temperature detected by a temperature sensor is lower than a first determination value, a controller opens the flow rate control valve corresponding to a heat exchanger, of the third heat exchangers, to which a request for air conditioning has not been made, and closes the flow rate control valve corresponding to a heat exchanger, of the third heat exchangers, to which the request for air conditioning has been made. When heating is being performed, and the temperature detected by the temperature sensor is higher than a second determination value, the controller opens the flow rate control valve corresponding to the heat exchanger to which the request for air conditioning has been made, and closes the flow rate control valve corresponding to the heat exchanger to which the request for air conditioning has not been made.

In a control device, an instruction acquirer acquires an instruction to suppress in a specified period supplying of generated power generated by power generator installed in a power-consuming area to a commercial electrical power system. Upon the instruction acquirer acquiring the instruction, a water heater controller commands a water heater installed in the power-consuming area to perform a water heat-up operation when a predetermined condition is satisfied in the specified period.

An air-conditioning apparatus includes: a heat source-side system having an intermediate heat exchanger that causes heat exchange to be performed between a heat source-side heat medium and a use-side heat medium, causes the heat source-side heat medium to receive or transfer heat, and causes the use-side heat medium to undergo a phase change; and a use-side cycle circuit formed of pipes connecting, to one another, the intermediate heat exchanger, a pump that sucks and delivers the use-side heat medium in a liquid state, a use-side heat exchanger that heats or cools air in an air-conditioning target space due to heat exchange causing a change in phase of the use-side heat medium, and a pressure-reducing device that reduces a pressure of the use-side heat medium that passes through the use-side heat exchanger, the use-side cycle circuit causing the use-side heat medium to circulate through the use-side cycle circuit.

In a control device, an instruction acquirer acquires an instruction to suppress in a specified period supplying of generated power generated by power generator installed in a power-consuming area to a commercial electrical power system. Upon the instruction acquirer acquiring the instruction, a water heater controller commands a water heater installed in the power-consuming area to perform a water heat-up operation when a predetermined condition is satisfied in the specified period.