COMBINED HOT WATER SUPPLY AND AIR-CONDITIONING DEVICE

• US 20130219945A1
• Filed: 12/22/2010
• Published: 08/29/2013
• Est. Priority Date: 12/22/2010
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Koge, Hirofumi, Kawagoe, Tomokazu
• Granted Patent: US 9,528,713 B2
• Time in Patent Office: Days
• US Class Current: 62/324.6
• CPC Class Codes: F24D 15/04 using heat pumps
• CPC Class Codes: F24D 19/1054 the system uses a heat pump
• CPC Class Codes: F24D 2200/123 Compression type heat pumps
• CPC Class Codes: F24D 3/08 in combination with systems for domestic hot-water supply
• CPC Class Codes: F24F 3/06 characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
• CPC Class Codes: F24F 5/00 Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00 , e.g. using solar heat or combined with household units such as an oven or water heater
• CPC Class Codes: F24F 5/0017 using cold storage bodies, e.g. ice
• CPC Class Codes: F24H 4/02 Water heaters
• CPC Class Codes: F24H 6/00 Combined water and air 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 2313/0231 with simultaneous cooling and heating
• CPC Class Codes: F25B 2313/0252 with bypasses
• CPC Class Codes: F25B 2313/02741 using one four-way valve
• CPC Class Codes: F25B 30/02 of the compression type
• CPC Class Codes: F25B 7/00 Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit F25B9/00 takes precedence
• CPC Class Codes: Y02B 30/12 Hot water central heating systems using heat pumps
• CPC Class Codes: Y02E 60/14 Thermal energy storage

Abstract

A combined hot water supply and air-conditioning device supplies heat source even in a case where the outside air temperature is high such as in summertime.

In heating operation, a combined hot water supply and air-conditioning device controls the capacity of a heat source unit-side heat exchanger equipped to a heat source unit to thereby achieve a balance between the load of the heat source unit, and the total load of indoor units and a hot water supply unit.

Claims

1. A combined hot water supply and air-conditioning device comprising:

at least one heat source unit that is equipped with an air-conditioning compressor that compresses a first refrigerant, and a heat source unit-side heat exchanger;

a plurality of indoor units that are connected in parallel to the heat source unit, the indoor units being equipped with a use-side heat exchanger through which the first refrigerant flows; and

at least one hot water supply unit that is connected in parallel to the heat source unit, the hot water supply unit being equipped with a refrigerant-refrigerant heat exchanger through which the first refrigerant and a second refrigerant flow, a heat medium-refrigerant heat exchanger through which a heat medium and the second refrigerant flow, and a hot water supply compressor that compresses the second refrigerant,

wherein in heating operation, a capacity of the heat source unit-side heat exchanger equipped to the heat source unit is controlled to achieve a balance between a load of the heat source unit, and a total load of the indoor units and the hot water supply unit.

3. The combined hot water supply and air-conditioning device of claim 1, wherein:

the combined hot water supply and air-conditioning device is provided with

a bypass pipe that bypasses the heat source unit-side heat exchanger, and

a bypass valve that is installed in the bypass pipe; and

the capacity of the heat source unit-side heat exchanger equipped to the heat source unit is controlled by regulating a flow rate of the first refrigerant entering the bypass pipe by controlling the bypass valve.

4. The combined hot water supply and air-conditioning device of claim 1, wherein a load of the indoor units and a load of the hot water supply unit can be switched.

5. The combined hot water supply and air-conditioning device of claim 1, wherein in a state in which only the hot water supply unit is operating, the capacity of the heat source unit-side heat exchanger equipped to the heat source unit is controlled so that a high-pressure side pressure of the first refrigerant discharged from the air-conditioning compressor is within a predetermined range.

2. A combined hot water supply and air-conditioning device comprising:

at least one heat source unit that is equipped with an air-conditioning compressor that compresses a first refrigerant, and a heat source unit-side heat exchanger;

a plurality of indoor units that are connected in parallel to the heat source unit, the indoor units being equipped with a use-side heat exchanger through which the first refrigerant flows; and

at least one hot water supply unit that is connected in parallel to the heat source unit, the hot water supply unit being equipped with at least a heat medium-refrigerant heat exchanger through which a heat medium and the first refrigerant flow,

wherein in heating operation, a capacity of the heat source unit-side heat exchanger equipped to the heat source unit is controlled to achieve a balance between a load of the heat source unit, and a total load of the indoor units and the hot water supply unit.