SYSTEM FOR AIR-CONDITIONING AND HOT-WATER SUPPLY

• US 20190309989A1
• Filed: 09/14/2017
• Published: 10/10/2019
• Est. Priority Date: 09/23/2016
• Status: Active Grant

• Current Assignee: Daikin Europe N.V. (Daikin Industries Ltd), Daikin Industries Ltd
• Original Assignee: Daikin Industries Ltd
• Inventors: CHIKAMI, Hideo, COESSENS, Tim
• Granted Patent: US 10,921,023 B2
• Time in Patent Office: Days
• CPC Class Codes: F24F 1/0003 characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 11/83 by controlling the supply of heat-exchange fluids to heat-exchangers
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2221/183 combined with a hot-water boiler
• CPC Class Codes: F24F 2221/54 Heating and cooling, simultaneously or alternatively
• CPC Class Codes: F24F 5/0096 combined with domestic apparatus
• CPC Class Codes: F24H 4/02 Water heaters
• CPC Class Codes: F25B 13/00 Compression machines, plants or systems, with reversible cycle defrosting cycles F25B47/02
• CPC Class Codes: F25B 2313/003 Indoor unit with water as a heat sink or heat source
• CPC Class Codes: F25B 2313/006 two pipes connecting the outdoor side to the indoor side with multiple indoor units
• CPC Class Codes: F25B 2313/0233 in parallel arrangements
• CPC Class Codes: F25B 2313/02334 during heating
• CPC Class Codes: F25B 2313/02741 using one four-way valve
• CPC Class Codes: F25B 2313/0293 related to the indoor fan, e.g. controlling speed
• CPC Class Codes: F25B 2500/27 characterised by the stop of the refrigeration cycle
• CPC Class Codes: F25B 2600/0251 with on-off operation
• CPC Class Codes: F25B 2600/2513 Expansion valves
• CPC Class Codes: F25B 2700/2104 of an indoor room or compartment
• CPC Class Codes: F25B 2700/2106 : of fresh outdoor air
• CPC Class Codes: F25B 49/02 : for compression type machines, plants or systems
• CPC Class Codes: Y02B 30/70 : Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

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 indoor unit and including a refrigerant-water heat exchanger; a controller configured to monitor an occurrence of a request for hot-water supply from the hot-water supply unit during the cooling operation being performed at at least one indoor unit among the at least one or more indoor units, and then to start the heating operation in accordance with the request. The controller is further configured to transmit to each of the at least one or more indoor units, which is turned on for the cooling operation, a fan-stop command to stop a fan arranged at each indoor unit.

Claims

1. A system for air-conditioning and hot-water supply and configured to selectively perform a cooling operation and a 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;

a controller configured to monitor an occurrence of a request for hot-water supply from the hot-water supply unit during the cooling operation being performed at at least one indoor unit among the at least one or more indoor units, and then to start the heating operation in accordance with the request;

wherein the controller is further configured to transmit to all each of the at least one or more indoor units, which is turned on for said cooling operation, a fan-stop command to stop a fan arranged at each indoor unit.

2. The system for air-conditioning and hot-water supply according to claim 1, wherein

the controller is further configured to transmit to the compressor a compressor-stop command to stop the compressor;

and

the controller is further configured to transmit the compressor-stop command and the fan-stop command substantially at the same time.

3. The system for air-conditioning and hot-water supply according to claim 1, wherein

the controller is further configured to transmit said fan-stop command before starting the heating operation.

4. The system for air-conditioning and hot-water supply according to claim 1,

further comprising a plurality of valves each of which is arranged for the hot-water supply unit and each of the at least one or more indoor units and which is configured to control an amount of refrigerant supplied to a corresponding unit.

5. The system for air-conditioning and hot-water supply according to claim 4,

wherein the controller is configured to maintain each valve corresponding to each indoor unit in a predetermined open degree during the heating operation.

6. The system for air-conditioning and hot-water supply according to claim 2, wherein

the controller is further configured to transmit said fan-stop command before starting the heating operation.

7. The system for air-conditioning and hot-water supply according to claim 2,

further comprising a plurality of valves each of which is arranged for the hot-water supply unit and each of the at least one or more indoor units and which is configured to control an amount of refrigerant supplied to a corresponding indoor unit.

8. The system for air-conditioning and hot-water supply according to claim 3,

further comprising a plurality of valves each of which is arranged for the hot-water supply unit and each of the at least one or more indoor units and which is configured to control an amount of refrigerant supplied to a corresponding indoor unit.