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.
1. A system for air-conditioning and hot-water supply and configured to alternatively perform an air cooling operation and a water heating operation, 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 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 water heating operation;
wherein
the controller is further configured to determine a time to resume said cooling operation based on an outdoor temperature and/or a target temperature of at least one indoor unit in said heating operation,
wherein
the controller is further configured to determine the time to resume said cooling operation so that a period of the water heating operation becomes shorter as the outdoor temperature is higher and/or as the target temperature of at least one indoor unit is lower.
2. The system for air-conditioning and hot-water supply according to claim 1 , wherein
the controller is further configured to perform said cooling operation until receipt of a signal from each of all indoor units in said cooling operation, and then to start said heating operation; and
the signal indicating that a current room temperature has reached a target temperature of a corresponding indoor unit.
3. The system for air-conditioning and hot-water supply according to claim 1 , wherein
the controller is further configured to determine the time to resume said cooling operation based on a difference between the outdoor temperature and any one of target temperatures of one or more indoor units which were in said cooling operation.
4. The system for air-conditioning and hot-water supply according to claim 1 , wherein
at least one of the indoor units includes a sensor within or on its housing, the sensor being configured to detect a room temperature.
5. The system for air-conditioning and hot-water supply according to claim 2 , wherein
the controller is further configured to determine the time to resume said cooling operation based on a difference between the outdoor temperature and any one of target temperatures of one or more indoor units which were in said cooling operation.
6. The system for air-conditioning and hot-water supply according to claim 2 , wherein
at least one of the indoor units includes a sensor within or on its housing, the sensor being configured to detect a room temperature.
7. The system for air-conditioning and hot-water supply according to claim 3 , wherein
at least one of the indoor units includes a sensor within or on its housing, the sensor being configured to detect a room temperature.