Daikin Industries, Ltd.

Daikin Europe N.v.

Hideo Chikami

Tim Coessens

Wim Vansteenkiste

Akshay Hattiangadi

Yuuichi Kita

Stefanie Debaets

Kyouji Araya

Takashi Tsuchino

Jasper Van De Vyver

A heat pump includes a compressor, a first heat exchanger, a main expansion mechanism and a second heat exchanger arranged in a refrigeration path, the compressor having a suction port, a compression port and an injection port; a gas injection valve connected on a first side to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side to the injection port of the compressor; a liquid injection valve connected on a first side to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side between the second heat exchanger and the suction port of the compressor; and a controller configured to operate the gas injection valve to inject partly gaseous refrigerant into the compressor, and operate the liquid injection valve to inject liquid refrigerant into the compressor through the suction port of the compressor.

Heat pump

A system for air-conditioning and hot-water supply selectively performs cooling and heating operations. The system includes: an outdoor unit having a compressor and an outdoor heat exchanger; indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit and arranged in parallel to the indoor units and including a refrigerant-water heat exchanger; and a controller monitoring an occurrence of a hot water request for hot-water supply from the hot-water supply unit during the cooling operation performed at at least one of the indoor units, and then to start the heating operation in accordance with the hot-water request. The controller also monitors an occurrence of an indoor-unit request from any one of the indoor units and resumes the cooling operation where the request is an increase request for an increase of load of the cooling operation.

System for air-conditioning and hot-water supply

A system for air-conditioning and hot-water supply is configured to selectively perform a cooling operation and a heating operation. The system includes: an outdoor unit having a compressor and an outdoor heat exchanger; at least one or more indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit so as to be arranged in parallel to the at least one or more indoor units and including a refrigerant-water heat exchanger; and a controller configured to monitor an occurrence of a request for hot-water supply from the hot-water supply unit during the cooling operation performed at at least one of the indoor units, and then to start the heating operation. The controller is further configured to determine a time point to resume the cooling operation based on at least one of an outdoor temperature and a target temperature of at least one indoor unit in the heating operation.

A system for air-conditioning and hot-water supply is configured to selectively perform a cooling operation and a heating operation. The system includes: an outdoor unit having a compressor and an outdoor heat exchanger; a plurality of indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit so as to be arranged in parallel to the indoor unit and including a refrigerant-water heat exchanger; and a controller configured to monitor a request for hot-water supply from the hot-water supply unit. The controller is further configured to continue a cooling operation after the request has occurred and until a predetermined condition is satisfied where the request for hot-water supply has occurred during the cooling operation at at least one of the plurality of indoor units, and then to start a heating operation.

Provided is a system for air-conditioning and hot-water supply configured to selectively perform cooling and heating operations, comprising: an outdoor unit having a compressor and an outdoor heat exchanger; at least one or more indoor units each of which is connected to the outdoor unit and includes an indoor heat exchanger; a hot-water supply unit connected to the outdoor unit so as to be arranged in parallel to the indoor unit and including a refrigerant-water heat exchanger; a controller configured to monitor for a request for hot-water supply from the hot-water supply unit while a cooling operation is being performed in at least one of the indoor units, and then to start the heating operation in accordance with the request; wherein the controller transmits to all of the indoor units, which are turned on for said cooling operation, a fan-stop command to stop a fan arranged at each indoor unit.

Provided is a temperature-adjusting fluid supply apparatus that causes a fluid for temperature adjustment to be circulated between a heat exchanger that transfers heat supplied from a refrigerant to the fluid, and an object to be adjusted for temperature that uses the heat of the fluid, the temperature-adjusting fluid supply apparatus being able to prevent the fluid from freezing. A temperature-adjusting fluid supply apparatus is provided with a heat exchanger that transfers heat supplied from a refrigerant to a fluid for temperature adjustment, a supply tube through which the fluid flows from the heat exchanger toward an object to be adjusted for temperature, a return tube through which the fluid returning from the object to be adjusted for temperature flows, a flow rate adjustable pump, a flow sensor, a flow switch, a temperature sensor, and a control part. The flow switch, in comparison with the flow sensor, is able to detect flow rate changes with coarser precision, and is less affected in detection accuracy by viscosity changes in the fluid. On the basis of the temperature of the fluid detected by the temperature sensor, the control part switches between pump control based on the detection results of the flow sensor and pump control based on the detection results of the flow switch.

Temperature-adjusting fluid supply apparatus

A hot-water storage type hot-water supply device includes a heat pump unit () for heating water, a hot-water storage tank () for storing hot water heated by the heat pump unit (), and a hot-water supplying heat exchanger () placed so as to extend roughly entirely in a vertical direction thereof and which receives water from a lower side thereof and discharges hot water from an upper side thereof.

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Ostend, Belgium

Hideo Chikami