JPS6262277B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an air-conditioning/heating water supply system, and an object of the present invention is to provide refrigerant control for the air-cooling/heating/water supply system that can easily supply hot water by adding a heat exchanger for hot water supply to an air-cooling type air-conditioning/heating machine. Conventionally, air-cooled air conditioners are used in general households, depending on whether cold water for cooling is produced in a water cooler/heater for cooling, or hot water for heating is produced in a water cooler/heater for heating. has been done. To explain this as shown in Fig. 2, the compressor 2
4, four-way valve 25, air-cooled heat exchanger 26, check valve 2
7. A heating capillary tube 28, a capillary tube 29, a water cooler/heater 30, and an accumulator 31 which bypass the check valve 27 are installed in series to form an air-cooled air conditioner/heater. However, although such an air-cooled air conditioner/heater cools and heats the room, separate equipment such as a boiler must be installed to supply hot water to the kitchen, bathtub, washroom, and the like. However, boilers lacked safety and had disadvantages such as high equipment costs, which made them undesirable from both safety and energy conservation points of view. The present invention solves the above-mentioned conventional drawbacks, and an embodiment thereof will be described below based on FIG. 1. In the figure, 1 is a compressor, 2 is a four-way valve, 3 is an air-cooled heat exchanger, 4 is a liquid receiver, 5 is an expansion valve, and 6 is a water cooler/heater, which is equipped with an outlet 7 and a return port 8 to the load side. It is being 9 is an accumulator, 10 is a heat exchanger for hot water supply, and is provided with an outlet 11 and a return port 12 for sending water to the kitchen, bathtub, washroom, etc. Reference numeral 13 denotes a first solenoid valve provided in the middle of a pipe for sending refrigerant from the compressor 1 to the four-way valve 2, and reference numeral 14 denotes a second solenoid valve provided in the middle of a pipe for sending refrigerant from the compressor 1 to the heat exchanger 10 for hot water supply. It is. The first solenoid valve 13 is opened during cooling and heating, and the second solenoid valve 14 is opened during cooling and hot water supply. Further, after passing the expansion valve 5, a third solenoid valve 15, a fourth solenoid valve 16, and a fifth solenoid valve 17 are respectively provided. Sometimes it becomes open. 18, 19, 2
0, 21, and 22 are check valves provided in the middle of the refrigerant piping. In the figure, the solid line arrow indicates the refrigerant circuit during cooling, the dotted line arrow indicates the refrigerant circuit during heating, the dashed line arrow indicates the refrigerant circuit during cooling hot water supply, and the broken line arrow indicates the refrigerant circuit during hot water supply. In the above configuration, during cooling, compressor 1 - first solenoid valve 13 - four-way valve 2 - air-cooled heat exchanger 3 - check valve 2
1 - Liquid receiver 4 - Expansion valve 5 - Check valve 18 - Water cooler 6 - Four-way valve 2 - Accumulator 9 - Compressor 1
refrigerant circuit. At this time, the fifth solenoid valve 17 is opened to recover the refrigerant in the hot water supply heat exchanger 10 path. During heating, compressor 1 - first solenoid valve 13 - four-way valve 2 - water cooler/heater 6 - check valve 2
0-liquid receiver 4-expansion valve 5-check valve 19-air-cooled heat exchanger 3-four-way valve 2-accumulator 9-compressor 1 refrigerant circuit. At this time, as in the case of cooling, the fifth solenoid valve 17 is opened to recover the refrigerant in the hot water supply heat exchanger 10 path.
During cooling hot water supply, compressor 1 - second solenoid valve 14
- Hot water heat exchanger 10 - Check valve 22 - Liquid receiver 4 -
It becomes the refrigerant circuit of the expansion valve 5 - check valve 18 - water cooler/heater 6 - four-way valve 2 - accumulator 9 - compressor 1. At this time, the fourth solenoid valve 16 is opened and the refrigerant accumulated in the air-cooled heat exchanger 3 is recovered. During hot water supply, compressor 1 - second solenoid valve 1
4-Hot water heat exchanger 10-Check valve 22-Liquid receiver 4
- Expansion valve 5 - Fourth solenoid valve 16 - Air-cooled heat exchanger 3 -
It becomes the refrigerant circuit of four-way valve 2 - accumulator 9 - compressor 1. At this time, the third solenoid valve 15 is opened to recover the refrigerant in the water cooler/heater 6 path. The table below shows the opening and closing times of the first to fifth solenoid valves during each operation.

[Table] The third solenoid valve for cooling and hot water supply, and the fourth solenoid valve for heating and hot water supply, are not particular about opening or closing. As described above, according to the present invention, a heat exchanger for hot water supply is added, the discharge pipe side from the compressor is branched, and solenoid valves are provided on both sides of the branch, and one solenoid valve is used for cooling and for heating. The solenoid valve is opened at times to form a flow path in the four-way valve, and the other solenoid valve is opened during hot water supply and cooling hot water supply to form a flow path to the hot water heat exchanger, and the other solenoid valve is opened to form a flow path to the hot water heat exchanger. After passing through the expansion valve, a flow path is formed to the water cooler/heater for cooling and hot water supply, and to the air/cooler heat exchanger for heating and hot water supply, and in parallel with this flow path is the water cooler and hot water heater and hot water supply. The heat exchanger has a flow path with a solenoid valve on the outflow side of the expansion valve, and by opening and closing this solenoid valve, when the water cooler/heater or hot water heat exchanger does not work, the parallel flow path works. The refrigerant accumulated in each of the internal flow channels is collected to ensure that the total refrigerant circulation volume is not insufficient, so the refrigerant circuit is simple and highly efficient, and can be used throughout the year when cooling or heating is not performed. By using it all year round, the initial cost can be recovered in a short period of time. Energy savings can be achieved by operating a heat pump for water supply, and in the summer, running costs for hot water supply can be reduced by using waste heat. Also, compared to installing a boiler as in the past, equipment costs can be reduced and safety is improved.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant circuit diagram of an air conditioning, heating, and hot water supply apparatus according to the present invention, and FIG. 2 is a refrigerant circuit diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Four-way valve, 3... Air-cooled heat exchanger, 5... Expansion valve, 6... Water cooler/heater, 10... Heat exchanger for hot water supply.

Claims (1)

[Claims] 1. A four-way valve connected to the compressor and configured to switch the flow direction of the refrigerant so that the refrigerant from the compressor flows through either the air-cooled heat exchanger or the water cooler/heater and is recovered from the other; and the air-cooled heat exchanger and A liquid receiver connected to each of the water cooler/heater, a check valve connected between the air-cooled heat exchanger and the liquid receiver and configured to be in a flowing state only when refrigerant flows into the liquid receiver, and the water cooler/heater. a check valve that is connected between the liquid receivers and becomes in a flowing state only when refrigerant flows into the liquid receiver side; an expansion valve into which refrigerant flows from the liquid receiver; the expansion valve and the air-cooled heat exchanger; A check valve is provided between each of the cold water heaters and is in a flow state only when the water flows from the expansion valve to the air-cooled heat exchanger or the cold water heater, and a refrigerant pipe is branched from the outlet side of the compressor. a first solenoid valve provided on the four-way valve side;
A second solenoid valve provided on the other branched refrigerant pipe, a hot water heat exchanger connected to the compressor via the second solenoid valve, and a hot water supply heat exchanger connected to the compressor through the second solenoid valve, a third solenoid valve and a fourth solenoid valve provided in parallel with the check valve between the water dispensers;
provided between the hot water supply heat exchanger and the liquid receiver,
A check valve that is in a flow state only in the flow direction of the refrigerant flowing into the liquid receiver, and a check valve that branches the outflow side of the hot water heat exchanger to the liquid receiver and is provided between the outflow side of the expansion valve. and a fifth solenoid valve, the first and fifth solenoid valves are open and the second and fourth solenoid valves are closed during cooling, and the first and fifth solenoid valves are open during heating; The second and third solenoid valves are closed, the second and third solenoid valves are opened when hot water is being supplied, the first and fifth solenoid valves are closed, and the second and fourth solenoid valves are open when hot water is being supplied for cooling. An air-conditioning, heating, and water-heating device configured such that the first and fifth solenoid valves are closed.