JP2000179985A - Multifunction heat pump system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize night power effectively through ice heat storage or hot water heat storage to utilize waste heat for hot water supply by performing ice heat storage operation, cooling operation, cooling operation utilizing ice heat storage, hot water heat storage operation, heating operation utilizing outer air as heat source, heating operation utilizing hot water heat storage, and the like. SOLUTION: Ice heat storage operation is performed during night time in summer season and cooling operation is performed in summer season. In these operations, high temperature high pressure gas from a compressor 1 passes through an outdoor heat exchanger 8 functioning as a condenser. Cooling operation utilizing ice heat storage is performed during power peak time band in day time of summer season. Refrigerant gas from the compressor 1 passes through the outdoor heat exchanger 8 functioning as a condenser and a heat storage tank 22. Hot water heat storage operation is performed in night time of winter season. Refrigerant gas from the compressor 1 passes through the heat storage tank 22. Heating operation utilizing outer air as heat source is performed in day time of winter season. Gas from the compressor 1 passes through an indoor heat exchanger 17. Night time power is utilized effectively by utilizing ice heat storage and hot water heat storage in correspondence with the season and the time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional heat pump system used in a house or the like which enables cooling, heating, ice heat storage, hot water heat storage, hot water heating and various simultaneous operations.

[0002]

2. Description of the Related Art Conventionally, as a residential heat pump system, a heat pump system capable of supplying heat pump hot water and utilizing the exhaust heat of cooling for hot water supply heating, and a system in which cold water is stored in a hot water storage tank to level the power load. Various things have been proposed.

[0003]

Further, even now, there is a demand for further leveling of the power load and energy saving at the peak of the air conditioning load. The present invention has been made in view of the above circumstances, and the invention according to claim 1 can effectively use nighttime electric power by using ice heat storage and hot water heat storage, and use ice heat storage and waste heat during cooling. It is an object of the present invention to provide a multifunctional heat pump system capable of heating hot water.

Another object of the present invention is to provide a multifunctional heat pump system which can cope with a refrigerant leak caused by piping work during installation or repair.

A further object of the present invention is to provide a multi-functional heat pump system capable of simultaneously using hot water supply and heating by an electric water heater.

[0006]

In order to achieve the above object, a multifunctional heat pump system according to claim 1 is provided.
A compressor, an outdoor heat exchanger, a first pressure reducing mechanism, and an indoor heat exchanger are connected in a ring shape in this order, and the hot water is supplied by heating circulating water from a hot water storage tank circulated by a circulating pump. A heat exchanger, a second pressure reducing mechanism, a heat storage tank for both ice heat storage and hot water heat storage, and a third pressure reducing mechanism are interposed, and a refrigerant is circulated therebetween, and the ice heat storage operation is performed. At the time, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the second decompression mechanism, the heat storage tank, and the compressor. And the heat exchanger for hot water supply, the outdoor heat exchanger, the second decompression mechanism, the heat storage tank, and the compressor. In the cooling operation, the refrigerant flows through the compressor, the outdoor heat exchanger. Vessel, the first pressure reducing mechanism, the indoor heat exchanger, and the During the simultaneous operation of cooling and hot water supply and heating, the refrigerant flows through the compressor, the hot water supply heat exchanger, the outdoor heat exchanger, the first decompression mechanism, the indoor heat exchanger, and the compressor. The refrigerant is circulated in the order of the compressors, and during the cooling operation utilizing the ice storage, the refrigerant flows in the order of the compressor, the outdoor heat exchanger, the heat storage tank, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor. During the simultaneous operation of cooling and hot water supply and heating using ice heat storage, the refrigerant is supplied to the compressor,
The hot water supply heat exchanger, the outdoor heat exchanger, the heat storage tank,
The first pressure reducing mechanism, the indoor heat exchanger, and the compressor are circulated in this order, and during the hot water heat storage operation, the refrigerant flows through the compressor, the heat storage tank, the second pressure reducing mechanism, and the outdoor heat exchanger. And the compressor is circulated in the order, during a heating operation using outside air as a heat source, the refrigerant flows in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the outdoor heat exchanger, and the compressor. In the heating operation using hot water heat storage, the refrigerant is circulated in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the heat storage tank, and the compressor. The refrigerant is circulated in the order of the compressor, the hot water supply heat exchanger, the third pressure reducing mechanism, the outdoor heat exchanger, and the compressor.

[0007] In the multifunctional heat pump system according to the second aspect, in the first aspect, the compressor, the outdoor heat exchanger, the first decompression mechanism, the indoor heat exchanger,
The heat exchanger for hot water supply, the second decompression mechanism, the heat storage tank, and the third decompression mechanism are unitized.

Further, a multifunctional heat pump system according to claim 3 is characterized in that, in claim 1 or 3, the hot water storage tank is formed of an electric water heater.

According to the first aspect of the present invention, ice heat storage operation
Simultaneous operation of ice storage and hot water supply, cooling operation, simultaneous operation of cooling and hot water supply, cooling operation using ice storage, simultaneous operation of cooling and hot water supply using ice storage, hot water storage operation, heating operation using outside air as a heat source, heating operation using hot water storage The operation and the hot water supply heating operation can be performed. Therefore, the nighttime electric power is effectively used by using the ice heat storage and the hot water heat storage, so that the power load is leveled at the peak of the air conditioning load and the running cost is reduced by using the cheaper power. In addition, since hot water is supplied and heated by using ice heat storage and waste heat during cooling, energy saving and cost saving can be achieved.

According to the second aspect of the present invention, the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, the hot water supply heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the third pressure reducing mechanism. Are unitized and integrated, so a refrigerant pipe for circulating the refrigerant between them is contained in the unit,
Since it is not required outside, the refrigerant does not leak to the outside of the unit during piping work during installation or repair.

According to the third aspect of the present invention, since the electric water heater is used as the hot water storage tank, it is possible to simultaneously perform hot water supply heating by the electric water heater.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the multifunctional heat pump system according to the present invention will be described below with reference to the drawings.
FIG. 1 is a refrigerant circuit diagram of the multifunctional heat pump system according to the present embodiment. In the drawing, reference numeral 1 denotes a compressor, and a dry double-pipe heat exchange for hot water supply is provided on the discharge side of the compressor 1 by a refrigerant pipe 2 through which a refrigerant such as R-22 (CFC) flows. The vessel 3 is connected. Refrigerant pipe 2
Is provided with an electromagnetic on-off valve 2A. Circulating water is circulated between the hot water supply heat exchanger 3 and the electric water heater 4 by a circulating pump 5. The electric water heater 4 can perform the original heating by the electric heater, and in the present embodiment, the hot water is supplied by the hot water supply heat exchanger 3, and in this case, functions as a hot water storage tank.

A heat exchanger 3 for hot water supply is connected to a plate fin type outdoor heat exchanger 8 provided with a propeller type blower 7 by a refrigerant pipe 6. In the refrigerant pipe 6,
The solenoid on-off valve 9A and the solenoid on-off valve 9 are interposed in order from the hot water supply heat exchanger 3 side.

The outdoor heat exchanger 8 is connected to a refrigerant pipe 10 provided with an electromagnetic on-off valve 10A.
Are branched into three refrigerant pipes 11, 12, and 13. The branched refrigerant pipe 11 is connected to a first expansion valve (first pressure reducing mechanism) 15 via an electromagnetic on-off valve 14. The first expansion valve 15 is connected to an indoor heat exchanger 17 provided with a double suction sirocco type blower 16. The indoor heat exchanger 17 is connected to the compressor 1 by a refrigerant pipe 18. The solenoid valve 1 is connected to the refrigerant pipe 18.
9 are interposed.

The branched refrigerant pipe 12 is connected to a second expansion valve (second pressure reducing mechanism) 20. The second expansion valve 20 is connected to a refrigerant supercooling type ice heat storage by a refrigerant pipe 21. And a heat storage tank 22 that also serves as hot water heat storage. The branched refrigerant pipe 13 is provided with an electromagnetic on-off valve 13A.
Is connected to the refrigerant pipe 21 via the

A refrigerant pipe 23 is connected to the heat storage tank 22. The refrigerant pipe 23 has three refrigerant pipes 24, 25,
It is branched to 26. The branched refrigerant pipe 24 is connected via an electromagnetic on-off valve 27 between the electromagnetic on-off valve 14 and the first expansion valve 15 in the refrigerant pipe 11. The branched refrigerant pipe 25 is connected to the refrigerant pipe 18 between the indoor heat exchanger 17 and the electromagnetic on-off valve 19 via an electromagnetic on-off valve 28. The branched refrigerant pipe 26 is connected to the compressor 1 between the electromagnetic on-off valve 19 and the compressor 1 via an electromagnetic on-off valve 29.

One end of a refrigerant pipe 30 is connected between the solenoid on-off valve 9 A and the electromagnetic on-off valve 9 in the refrigerant pipe 6, and the other end of the refrigerant pipe 30 is connected to the interior of the refrigerant pipe 18 by an electromagnetic on-off valve 19. It is connected to the heat exchanger 17 side. An electromagnetic opening / closing valve 31 is interposed in the refrigerant pipe 30. One end of a refrigerant pipe 32 is connected between the electromagnetic on-off valve 9 and the outdoor heat exchanger 8 in the refrigerant pipe 6, and the other end of the refrigerant pipe 32 is connected to the compressor by an electromagnetic on-off valve 29 in the refrigerant pipe 26. It is connected to one side. Refrigerant pipe 32
Is provided with an electromagnetic on-off valve 33.

One end of a refrigerant pipe 34 is connected between the compressor 1 and the electromagnetic switching valve 2A in the refrigerant pipe 2, and the other end of the refrigerant pipe 34 is connected to the electromagnetic switching valve 9A of the refrigerant pipe 6 and the refrigerant. The connection part 6B is connected between the pipe 6 and the connection part 6A of the refrigerant pipe 30. Refrigerant piping 3
4, an electromagnetic on-off valve 34A is interposed. One end of a refrigerant pipe 35 is connected to the connection part 6B, and the other end of the refrigerant pipe 35 is connected to the refrigerant pipe 10 on the opposite side of the electromagnetic on-off valve 10A from the outdoor heat exchanger 8. A third expansion valve (third pressure reducing mechanism) 36 is interposed in the refrigerant pipe 35.

Here, in FIG. 1, portions surrounded by a two-dot chain line, that is, a compressor 1, a hot water supply heat exchanger 3, a circulation pump 5, an outdoor heat exchanger 8, a blower 7, a first expansion valve 1
5, indoor heat exchanger 17, blower 16, second expansion valve 2
0, the heat storage tank 22, the third expansion valve 36, each refrigerant pipe, and each electromagnetic open / close valve are unitized and configured as a unit A. These devices and the refrigerant pipe are housed in a housing B as schematically shown in FIG. The conditioned air blown by the blower 16 is guided into the dwelling unit by the air supply duct C and returned by the return air duct D.
In the figure, F is a filter, and G and H are hot water supply heating pipes.

The multifunctional heat pump system thus configured is controlled by the control means, and performs various operations as follows. Hereinafter, various operations will be described.

(Ice heat storage operation) This operation is usually performed at night in summer. As shown in FIG. 3, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the second
The expansion valve 20 and the electromagnetic on-off valve 29 are opened, the other electromagnetic on-off valves and the expansion valve are closed, and the refrigerant flows into the compressor 1, the electromagnetic on-off valve 3 as shown by the solid arrow.
4A, solenoid on-off valve 9, outdoor heat exchanger 8, solenoid on-off valve 10
A, the second expansion valve 20, the heat storage tank 22, the solenoid on-off valve 29, and the compressor 1 are circulated in this order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the outdoor heat exchanger 8. The outdoor heat exchanger 8 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through the outdoor heat exchanger 8, and is then discharged by the second expansion valve 20. The pressure is reduced to a low pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing through the heat storage tank 22 to become a low-pressure gas, while ice heat is stored in the heat storage tank 22. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

In this operation, ice heat is stored using nighttime electric power, so that nighttime electric power can be effectively used.

(Simultaneous operation of ice storage and hot water supply)
It is usually driven during the summer nights. As shown in FIG. 4, in this operation, the electromagnetic on-off valve 2A, the electromagnetic on-off valve 9A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the second expansion valve 20, and the electromagnetic on-off valve 29 are opened, and The solenoid on-off valve and the expansion valve are closed, and the refrigerant flows through the compressor 1, the solenoid on-off valve 2A, the hot water supply heat exchanger 3,
The electromagnetic on / off valve 9A, the electromagnetic on / off valve 9, the outdoor heat exchanger 8, the electromagnetic on / off valve 10A, the second expansion valve 20, the heat storage tank 22, the electromagnetic on / off valve 29, and the compressor 1 are circulated in this order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the hot-water supply heat exchanger 3, where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to perform hot-water supply heating, and then passes through the outdoor heat exchanger 8. . The hot water supply heat exchanger 3 and the outdoor heat exchanger 8
Functions as a condenser, the high-temperature and high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid while passing through them,
The pressure is reduced by the second expansion valve 20 to a low-pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing through the heat storage tank 22 to become a low-pressure gas, while ice heat is stored in the heat storage tank 22. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

In this operation, ice heat is stored by using nighttime power, so that nighttime power can be effectively used. Further, waste heat generated due to the use of the heat storage tank 22 is
Since it can be used for hot water supply heating of the hot water supply heat exchanger 3, energy saving and cost saving can be achieved.

(Cooling operation) This operation is usually performed in summer. In this operation, a cooling operation that is normally performed is performed. As shown in FIG. 5, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 14, the first expansion valve 15, and the electromagnetic on-off valve 19 are opened, and The solenoid on-off valve and the expansion valve are closed, and the refrigerant flows through the compressor 1, as shown by the solid arrows.
Electromagnetic on-off valve 34A, electromagnetic on-off valve 9, outdoor heat exchanger 8, electromagnetic on-off valve 10A, electromagnetic on-off valve 14, first expansion valve 15,
The circulation is performed in the order of the indoor heat exchanger 17, the electromagnetic on-off valve 19, and the compressor 1.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the outdoor heat exchanger 8. The outdoor heat exchanger 8 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through the outdoor heat exchanger 8, and then the first expansion valve The pressure is reduced by 15 to a low-pressure two-phase state. Then, indoor heat exchanger 1
7 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

(Simultaneous Cooling / Hot Water Heating Operation) This operation is usually performed in summer. As shown in FIG. 6, in this operation, the solenoid on-off valve 2A, the solenoid on-off valve 9A, the solenoid on-off valve 9,
Electromagnetic on-off valve 10A, electromagnetic on-off valve 14, first expansion valve 15
And the electromagnetic on / off valve 19 is opened, the other electromagnetic on / off valves and the expansion valve are closed, and the refrigerant flows through the compressor 1, the electromagnetic on / off valve 2A, the hot water supply heat exchanger as indicated by solid arrows. 3, electromagnetic on / off valve 9A, electromagnetic on / off valve 9, outdoor heat exchanger 8, electromagnetic on / off valve 10A, electromagnetic on / off valve 14, first expansion valve 15, indoor heat exchanger 17, electromagnetic on / off valve 19 and compressor 1 It is cycled in order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the hot-water supply heat exchanger 3, where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to perform hot-water supply heating, and then passes through the outdoor heat exchanger 8. . The hot water supply heat exchanger 3 and the outdoor heat exchanger 8
Functions as a condenser, the high-temperature and high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid while passing through them,
The pressure is reduced by the first expansion valve 15 to a low-pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator,
The refrigerant evaporates while passing through the indoor heat exchanger 17 and becomes low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

In this operation, the exhaust heat generated in the indoor heat exchanger 20 can be used for the hot water supply of the hot water supply heat exchanger 3, so that energy saving and cost saving can be achieved.

(Cooling operation using ice heat storage) This operation is usually performed by
It is operated during peak hours during the daytime in summer (usually from 1 pm to 4 pm). As shown in FIG. 7, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the electromagnetic on-off valve 10
A, the electromagnetic on-off valve 13A, the electromagnetic on-off valve 27, the first expansion valve 15 and the electromagnetic on-off valve 19 are opened, the other electromagnetic on-off valves and expansion valves are closed, and the refrigerant is indicated by solid arrows. As shown, the compressor 1, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 9, the outdoor heat exchanger 8, the electromagnetic on-off valve 10A, the electromagnetic on-off valve 13A, the heat storage tank 22, the electromagnetic on-off valve 27, the first expansion valve 15, The circulation is performed in the order of the indoor heat exchanger 17, the electromagnetic on-off valve 19, and the compressor 1.

During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the outdoor heat exchanger 8 and the heat storage tank 22. The outdoor heat exchanger 8 and the heat storage tank 22 function as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through them, and then the first expansion valve 15 To reduce the pressure to a low-pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant evaporates while passing through the indoor heat exchanger 17 to become low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

In this operation, since the refrigerant is condensed by using the ice heat stored in the heat storage tank 22, the cooling capacity is improved, and the peak of the electric power can be cut because the ice is stored by the nighttime electric power.

(Simultaneous Cooling / Hot Water Supply Heating Operation Using Ice Storage) This operation is usually performed during the peak power hours during the daytime in summer (usually from 1:00 pm to 4:00 pm). As shown in FIG. 8, in this operation, the electromagnetic on / off valve 2A, the electromagnetic on / off valve 9A, the electromagnetic on / off valve 9, the electromagnetic on / off valve 10A, the electromagnetic on / off valve 13A, the electromagnetic on / off valve 27, the first expansion valve 15, the electromagnetic on / off Valve 19
Is opened, the other solenoid on-off valves and expansion valves are closed, and the refrigerant flows through the compressor 1, the solenoid on-off valve 2A, the hot-water supply heat exchanger 3, and the solenoid on-off valve as indicated by solid arrows. 9A, solenoid on-off valve 9, outdoor heat exchanger 8, solenoid on-off valve 10
A, electromagnetic on-off valve 13A, heat storage tank 22, electromagnetic on-off valve 27,
First expansion valve 15, indoor heat exchanger 17, electromagnetic on-off valve 19
And the compressor 1 in this order.

During this time, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 passes through the hot water supply heat exchanger 3 where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated. Then, the hot water is heated and then passed through the outdoor heat exchanger 8 and the heat storage tank 22. The hot water supply heat exchanger 3, the outdoor heat exchanger 8, and the heat storage tank 22 function as a condenser,
The high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through them, and then reduced in pressure by the first expansion valve 15 to be in a low-pressure two-phase state. Thereafter, the indoor heat exchanger 17 functions as an evaporator, and the refrigerant is supplied to the indoor heat exchanger 17.
To evaporate into low-pressure gas. Thereafter, the refrigerant gas is returned to the suction side of the compressor 1.

In this operation, since the refrigerant is condensed by using the ice heat stored in the heat storage tank 22, the cooling capacity is improved, and the power peak can be cut because the ice heat is stored by the nighttime power. In addition, the indoor heat exchanger 17
Can be used for hot water supply heating of the hot water supply heat exchanger 3, so that energy saving and cost saving can be achieved.

(Hot water heat storage operation) This operation is usually performed at night in winter. As shown in FIG. 9, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the electromagnetic on-off valve 28, the second expansion valve 20, the electromagnetic on-off valve 10A and the electromagnetic on-off valve 3
3 is opened, the other solenoid on-off valves and expansion valves are closed, and the refrigerant flows through the compressor 1, the solenoid on-off valve 34A, the solenoid on-off valve 31, and the solenoid on-off valve 28 as indicated by solid arrows. , Heat storage tank 22, second expansion valve 20, electromagnetic on-off valve 1
0A, outdoor heat exchanger 8, solenoid on-off valve 33 and compressor 1
In order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the heat storage tank 20. The heat storage tank 22 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is
While passing through them, the refrigerant is condensed to become a high-pressure refrigerant liquid, while hot water heat is stored in the heat storage tank 22. Thereafter, the refrigerant is decompressed by the second expansion valve 20 to be in a low-pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator,
The refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.

In the present operation, since the hot water is stored using the nighttime electric power, the nighttime electric power can be effectively used. Further, heat is taken by the outdoor heat exchanger 8 using the outside air as a heat source, and this heat is used to perform hot water heat storage, so that energy saving and cost saving can be achieved.

(Heating operation using outside air as heat source)
It is usually driven during the daytime in winter. In this operation, it operates as a heat pump using outside air as a heat source. As shown in FIG. 10, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the first expansion valve 15, the electromagnetic on-off valve 14, the electromagnetic on-off valve 10A and the electromagnetic on-off valve 33 are opened,
The other solenoid on-off valves and expansion valves are closed, and the refrigerant flows through the compressor 1, the solenoid on-off valve 34, as indicated by the solid arrows.
A, the electromagnetic on / off valve 31, the indoor heat exchanger 17, the first expansion valve 15, the electromagnetic on / off valve 14, the electromagnetic on / off valve 10A, the outdoor heat exchanger 8, the electromagnetic on / off valve 33, and the compressor 1 are circulated in this order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the indoor heat exchanger 17. The indoor heat exchanger 17 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through the indoor heat exchanger 17. Thereafter, the refrigerant is supplied to the first expansion valve 1
The pressure is reduced by 5 to a low-pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator, and the refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.

(Heating operation using hot water heat storage) This operation is usually performed at the peak of heating in the morning in winter. As shown in FIG. 11, in this operation, the electromagnetic on-off valve 34A, the electromagnetic on-off valve 31, the first expansion valve 15, the electromagnetic on-off valve 14, the electromagnetic on-off valve 13A and the electromagnetic on-off valve 29 are opened, and The solenoid on-off valve and expansion valve are closed, and the refrigerant is
As indicated by solid arrows, the compressor 1, the solenoid on-off valve 34A,
Solenoid on-off valve 31, indoor heat exchanger 17, first expansion valve 1
5, electromagnetic switching valve 14, electromagnetic switching valve 13A, heat storage tank 22,
The solenoid valve 29 and the compressor 1 are circulated in this order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the indoor heat exchanger 17. The indoor heat exchanger 17 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through the indoor heat exchanger 17. Thereafter, the refrigerant is supplied to the first expansion valve 1
The pressure is reduced by 5 to a low-pressure two-phase state. Thereafter, the heat storage tank 22 functions as an evaporator, and the refrigerant evaporates while passing therethrough to become a low-pressure gas, and thereafter is returned to the suction side of the compressor 1.

In this operation, the refrigerant is evaporated by using the hot water heat stored in the heat storage tank 22 at a temperature higher than the outside air temperature, so that the heating capacity is improved and the heat is stored by the nighttime electric power. Power peak cut can be achieved.

(Hot water supply heating operation) The hot water supply heating by the heat pump in this operation is usually used in the middle season. As shown in FIG. 12, in this operation, the solenoid on-off valve 2A, the solenoid on-off valve 9A, the third expansion valve 36, the solenoid on-off valve 10A and the solenoid on-off valve 33 are opened, and the other solenoid on-off valves and The expansion valve is closed, and the refrigerant flows through the compressor 1, the solenoid on-off valve 2A, the hot water supply heat exchanger 3,
Electromagnetic on-off valve 9A, third expansion valve 36, electromagnetic on-off valve 10
A, the outdoor heat exchanger 8, the solenoid on-off valve 33 and the compressor 1 are circulated in this order.

During this time, the high temperature discharged from the compressor 1
The high-pressure refrigerant gas passes through the hot water supply heat exchanger 3, where the circulating water from the electric water heater 4 circulated by the circulation pump 5 is heated to perform hot water supply heating. The hot water supply heat exchanger 3 functions as a condenser, and the high-temperature and high-pressure refrigerant gas is condensed into a high-pressure refrigerant liquid while passing through them. Thereafter, the refrigerant is depressurized by the third expansion valve 36 to be in a low-pressure two-phase state. Thereafter, the outdoor heat exchanger 8 functions as an evaporator, and the refrigerant evaporates while passing through the outdoor heat exchanger 8 to become a low-pressure gas, and then returns to the suction side of the compressor 1.

In such a multifunctional heat pump system, ice heat storage operation, simultaneous operation of ice heat storage and hot water supply, cooling operation, simultaneous operation of cooling and hot water supply, cooling operation using ice heat storage, cooling and hot water supply using ice heat storage It is possible to perform simultaneous operation, hot water heat storage operation, heating operation using outside air as a heat source, heating operation using hot water heat storage, and hot water supply heating operation, so that nighttime power can be effectively used by using ice heat storage and hot water heat storage. Therefore, it is possible to level the power load at the peak of the air conditioning load and reduce running costs by using inexpensive power. In addition, since hot water supply and heating can be performed using ice heat storage and exhaust heat during cooling, energy saving and cost saving can be achieved.

Further, the compressor 1, the hot water supply heat exchanger 3, the circulation pump 5, the outdoor heat exchanger 8, the blower 7, the first expansion valve 15, the indoor heat exchanger 17, the blower 16, the second expansion valve 2
0, the heat storage tank 22, the third expansion valve 36, each refrigerant pipe, and each solenoid on-off valve are housed in the housing B and are unitized as a unit A. Therefore, it is possible to prevent the refrigerant from leaking to the outside of the unit A during piping work during installation or repair.

In addition, since the electric water heater 4 is used as a hot water storage tank, it is possible to perform hot water supply heating using an electric heater as the electric water heater, and also perform hot water supply.

[0051]

As described above, according to the multifunctional heat pump system according to the first aspect, ice heat storage operation, ice heat storage / hot water supply heating simultaneous operation, cooling operation, cooling / hot water supply heating simultaneous operation, ice heat storage utilization Cooling operation, simultaneous operation of cooling and hot water supply using ice storage, hot water storage operation, heating operation using outside air as a heat source, heating operation using hot water storage, and hot water supply heating operation can be performed. Since nighttime power can be used effectively, power load leveling during peak air-conditioning loads and running costs can be reduced by using inexpensive power, while using ice heat storage and waste heat during cooling. Since the hot water supply and heating can be performed, energy saving and cost saving can be achieved.

Further, according to the multifunctional heat pump system of the second aspect, the compressor, the outdoor heat exchanger, the pressure reducing mechanism, the indoor heat exchanger, the hot water supply heat exchanger, the second pressure reducing mechanism,
Since the heat storage tank and the third decompression mechanism are unitized and integrated, a refrigerant pipe for circulating the refrigerant between them can be stored in the unit, and there is no need to provide any refrigerant pipe outside. In addition, it is possible to prevent the refrigerant from leaking to the outside of the unit at the time of piping work at the time of installation or repair.

Further, according to the multifunctional heat pump system of the third aspect, since the electric water heater is used as the hot water storage tank, there is an advantage that the hot water supply by the electric water heater can be performed together.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram showing one embodiment of a multifunctional heat pump system of the present invention.

FIG. 2 is a schematic perspective view showing a unit according to the present invention.

FIG. 3 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during an ice heat storage operation.

FIG. 4 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during simultaneous operation of ice heat storage and hot water supply heating.

FIG. 5 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during a cooling operation.

FIG. 6 is a diagram showing one embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram at the time of simultaneous cooling / hot water supply / heating operation.

FIG. 7 is a diagram showing an embodiment of the multifunctional heat pump system according to the present invention, and is a refrigerant circuit diagram during cooling operation using ice storage.

FIG. 8 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during simultaneous operation of cooling and hot water supply using ice storage.

FIG. 9 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during a hot water heat storage operation.

FIG. 10 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during a heating operation using outside air as a heat source.

FIG. 11 is a diagram showing an embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during a heating operation utilizing hot water storage.

FIG. 12 is a diagram showing one embodiment of the multifunctional heat pump system of the present invention, and is a refrigerant circuit diagram during a hot water supply heating operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 3 Heat exchanger for hot-water supply 4 Electric water heater (hot water tank) 5 Circulation pump 8 Outdoor heat exchanger 15 1st expansion valve (1st pressure reduction mechanism) 17 Indoor heat exchanger 20 2nd expansion valve ( (Second pressure reducing mechanism) 22 heat storage tank 36 third expansion valve (third pressure reducing mechanism)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenya Kawasaki 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Hikaru Kobayashi 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation (72) Inventor Hiroshi Kitagawa 3150 Iiyama, Atsugi-shi, Kanagawa Prefecture Inside PMAC Co., Ltd.

Claims (3)

[Claims] 1. A compressor, an outdoor heat exchanger, a first decompression mechanism, and an indoor heat exchanger are connected in a ring shape in this order, and a circulating pump heats circulating water from a hot water storage tank to supply hot water. A hot water supply heat exchanger for heating, a second pressure reducing mechanism, a heat storage tank for both ice heat storage and hot water heat storage, and a third pressure reducing mechanism are interposed, and a refrigerant is circulated therebetween, And, at the time of ice heat storage operation, the refrigerant is circulated in the order of the compressor, the outdoor heat exchanger, the second pressure reducing mechanism, the heat storage tank, and the compressor. The refrigerant is the compressor, the hot water supply heat exchanger, the outdoor heat exchanger, the second
The refrigerant is circulated in the order of the pressure reducing mechanism, the heat storage tank, and the compressor. During the cooling operation, the refrigerant flows through the compressor, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor. In the simultaneous operation of cooling, hot water supply and heating, the refrigerant flows into the compressor,
The heat exchanger for hot water supply, the outdoor heat exchanger, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor are circulated in this order. During the cooling operation using the ice storage, the refrigerant is cooled by the compressor and the compressor. The outdoor heat exchanger, the heat storage tank, the first decompression mechanism, the indoor heat exchanger, and the compressor are circulated in this order. When the ice storage utilizing cooling / hot water supply simultaneous operation is performed, the refrigerant is supplied to the compressor and the compressor. The hot water supply heat exchanger, the outdoor heat exchanger, the heat storage tank, the first pressure reducing mechanism, the indoor heat exchanger, and the compressor are circulated in this order. The heat storage tank, the second decompression mechanism, the outdoor heat exchanger, and the compressor are circulated in this order, and during a heating operation using outside air as a heat source, the refrigerant flows through the compressor, the indoor heat exchanger, 1 decompression mechanism, the outdoor heat exchanger and the above During the heating operation using hot water heat storage, the refrigerant is circulated in the order of the compressor, the indoor heat exchanger, the first pressure reducing mechanism, the heat storage tank, and the compressor, and the hot water heating operation A multifunctional heat pump system wherein the refrigerant is circulated in the order of the compressor, the hot water supply heat exchanger, the third pressure reducing mechanism, the outdoor heat exchanger, and the compressor. 2. The compressor, the outdoor heat exchanger, the first decompression mechanism, the indoor heat exchanger, the hot water supply heat exchanger, the second decompression mechanism, the heat storage tank, and the third The multifunctional heat pump system according to claim 1, wherein the pressure reducing mechanism is unitized. 3. The multifunctional heat pump system according to claim 1, wherein the hot water storage tank comprises an electric water heater.