JPH0875291A - Air heat source type air conditioning system - Google Patents

Abstract

PURPOSE: To reduce a heat transferring power and also reduce a capacity of a heat source device or a capacity of an electrical power facility by a method wherein a heat exchanger in a heat pump circuit having a heat accumulative tank circuit and a heat discharging circuit integrally assembled is operated as either a condensor or an evaporator in response to an operation mode. CONSTITUTION: A heat source device 10 comprises a heat accumulative tank circuit having a respective heat accumulative tank ST and having a first heat medium such as heat accumulating water circulated therein; a heat pump circuit having both a compressor COMP and an expansion valve EV and also having second heat medium such as refrigerant circulated therein; a first gas-liquid contact type heat exchanger EX1; and a heat discharging circuit having a third heat medium such as cooling water or the like circulated therein. The heat pump circuit operates a third heat exchanger EX3 as an evaporator during an ice heat storing mode and further operates a seventh heat exchanger EX7 as a condensor. In addition, during a hot water heat storing mode, a sixth heat exchanger EX6 is operated as an evaporator and then the third heat exchanger EX3 is operated as a condensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air heat source type air conditioning system, and in particular, it is possible to flexibly meet the air conditioning load demand for each individual space, and is excellent in energy saving, space saving and workability. The present invention relates to a heat source type air conditioning system.

[0002]

2. Description of the Related Art In recent years, as the cooling load has increased due to intelligent building functions and the demand for comfortable office environments has increased, the system for air conditioning equipment such as office buildings is changing from a central system to an individual distributed system. is there. Packaged heat pumps, multi-type air conditioners, wall-through air conditioners, and the like have been developed as air-conditioning equipment corresponding to such individual distributed building air-conditioning systems.

For example, a typical multi-type air conditioning system is
Multiple indoor units are connected to one outdoor unit,
Each indoor unit is configured to be individually controllable such as operation stop and room temperature setting. Such multi-system air conditioning equipment is ideal for the individual distribution system because it has excellent individual operation control characteristics, and it is possible to reduce heat transfer power compared to central air conditioning, which significantly consumes energy. It is also attracting attention because it can be used.

However, in the installation of the multi-type air conditioning equipment, the length and height difference of the refrigerant pipe connecting the indoor unit and the outdoor unit are varied depending on the installation location, and the cooling capacity is predicted and the piping is determined according to the installation site. It is necessary to select the diameter and properly adjust the oil injection amount.

In a typical wall-through type air conditioner, an indoor unit and an outdoor unit are integrally formed and installed in a perimeter zone of an air-conditioned space according to a required air conditioning load. By adjusting the number of units, it is possible to meet the individual distribution requirements of each air-conditioned space in detail. Unlike a multi-type air conditioner, such a wall-through type air conditioner can omit refrigerant pipes and the like, but it requires a very large amount of heat source air and has a system COP (coefficient of performance). ) Is reduced, and sufficient air conditioning capacity cannot be obtained depending on the outside air temperature, and its installation location and capacity are limited.
Furthermore, it is difficult to connect ducts, etc., so that there are limits to air quality control and thermal environment control.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on the above technical standpoint, and its purpose is to reduce energy consumption by reducing heat transfer power. Since it is possible to reduce the capacity of the heat source device and the capacity of electric power equipment as compared with the conventional system, it is advantageous in terms of initial cost, running cost, life cycle cost as compared with the conventional equipment,
Since the air conditioner has integrated the thermal environment and air quality control functions required in each individual air conditioning zone, it is possible to maintain the thermal environment and air quality environment required in each individual air conditioning zone in a good condition. Therefore, each individual air-conditioned space has excellent individual controllability, which makes it ideal for an individual decentralized system, which allows clear charge sharing according to use in a tenant building, etc., and especially a floor-standing built-in individual system has been adopted. In this case, the system has excellent maintainability, and despite the various installation conditions, it is possible to omit refrigerant pipes and refrigerant water pipes, omit on-site detention, simplify, and standardize. It is to provide an air heat source type air conditioning system.

[0007]

In order to solve the above-mentioned problems, an air-heat-source type air conditioning system constructed according to the present invention, that is, provided with first and second air supply paths, and at least individual heat storage A heat storage tank circuit having a tank in which the first heat medium circulates, a heat pump circuit having a compressor and an expansion valve in which a second heat medium circulates, and a gas-liquid contact type first heat exchanger provided in a third In an air heat source type air conditioning system including a heat source unit configured integrally with an exhaust heat circuit through which the heat medium circulates, at least the individual heat storage tank, the first heat medium, and the first air supply path are provided. A second heat exchanger for exchanging heat with the flowing supply air; and a third heat exchanger installed in the heat storage tank for exchanging heat between the first heat medium and the second heat medium, Fourth installed outside the heat storage tank to perform heat exchange between the first heat medium and the second heat medium
A heat storage tank circuit is configured from the heat exchanger of No. 3, and at least a third heat exchanger, a fourth heat exchanger, a second heat medium, and supply air flowing in the first supply path. Fifth heat exchange with
Heat exchanger, a sixth heat exchanger for exchanging heat between the second heat medium and the supply air flowing in the second supply path, the second heat medium and the third heat medium, And a seventh heat exchanger for exchanging heat, and a heat pump circuit, and at least a first heat exchanger and the seventh heat exchanger constitute an exhaust heat circuit. And the heat exchanger which comprises a heat pump circuit is comprised so that it may function selectively as a condenser or an evaporator according to an operation mode.

The fourth heat exchanger and the seventh heat exchanger of the heat source unit are sequentially arranged in series on the compressor side of the sixth heat exchanger, or the sixth heat exchanger. It is possible to sequentially arrange in series on the expansion valve side. Also,
It is also possible to integrally configure the fourth heat exchanger and the seventh heat exchanger of the heat source unit in the same shell.

Further, a common fourth heat medium is circulated in the heat storage tank circuit and the exhaust heat circuit, and the fourth heat exchanger and the seventh heat exchanger of the heat source unit are common to the eighth heat medium. It is also possible to adopt a configuration in which it is configured by an exchanger and the fourth heating medium is selectively circulated to the exhaust heat circuit side or the heat storage tank circuit side by the switching means.

Further, according to another aspect of the present invention, it is preferable that the air-conditioned space is divided into one or more air-conditioning units having a predetermined volume, and the heat source unit is installed for each air-conditioning unit. In that case, the air-conditioning unit is further divided into one or more individual air-conditioning zones, and a blower unit is installed in each individual air-conditioning zone, and air-conditioning air is selectively supplied from each heat source unit to each blower unit. It is preferable to be careful. It is possible to supply air conditioning air from the heat source unit to each blower unit via the first air supply passage and the second air supply passage, and each blower unit is supplied with the first air supply passage. Also, it is preferable to include a switching unit for switching the air conditioning air supplied from the second air supply path. Furthermore, it is also possible to employ a configuration in which a variable air volume control means is provided in each air blowing unit.

[0011]

Since the present invention is configured as described above, by selectively causing the heat exchanger of the heat pump circuit to function as an evaporator or a condenser depending on the operation mode, it is possible to simultaneously provide heating load, cooling load, and cooling / heating. Regardless of the type and size of heat load required in individual air-conditioned spaces such as load,
It is possible to flexibly meet all heat load requirements. Further, since only the exhaust gas having a volume equal to or less than the outside air introduced into the air-conditioned space for air quality control can be used as the heat source or heat carrier of the heat source unit, a separate device such as an air conditioner for outside air treatment can be omitted. It is possible to construct an air-heat source type air conditioning system that does not require a heat source of a completely distributed type. Further, since the heat storage tank water can be used as a cold heat source or a warm heat source, it is possible to improve the cooling / heating capacity and COP. In addition, since excess heat can be recovered in the heat storage tank, energy saving operation is possible.

By arranging the fourth heat exchanger and the seventh heat exchanger of the heat source unit in series on the compressor side of the sixth heat exchanger, the utilization efficiency of the heat storage tank circuit and the exhaust heat circuit can be improved. Can be increased. On the other hand, by sequentially arranging the fourth heat exchanger and the seventh heat exchanger of the heat source unit in series on the expansion valve side of the sixth heat exchanger, the seventh heat exchanger during the heating operation can be obtained. It is possible to reduce the heat loss from to the fourth heat exchanger. Further, the fourth heat exchanger and the seventh heat exchanger of the heat source unit are integrally formed in the same shell, so that the device can be simplified.

In addition, the heat storage tank circuit and the exhaust heat circuit have a common fourth
The heat source unit is circulated, and the fourth heat exchanger and the seventh heat exchanger of the heat source unit are constituted by a common eighth heat exchanger, and the fourth heat medium is exhausted by the switching means. It is possible to further simplify the configuration of the device by selectively circulating it to the heat storage tank circuit side or the heat storage tank circuit side.

According to still another aspect of the present invention, the air-conditioned space has a predetermined volume, for example, about 7 m × 1 including the outer wall surface.
By dividing into 1 or 2 or more air-conditioning units having 4 m (100 m ² ) and installing the heat source unit configured as described above for each air-conditioning unit,
Since the heat load control and the air quality control are completed individually, the transfer distance of the heat medium and the air is limited, and the heat transfer power can be significantly reduced. Further, since the air conditioning system is configured in the air conditioning section of a predetermined volume, it is possible to achieve the individuality of the thermal environment and the air quality environment while at the same time standardizing the equipment and construction.

The air conditioning unit divided as described above is further divided into one or more individual air conditioning zones, and each individual air conditioning zone is provided with a cold air / warm air switching means and / or a variable air volume control means. By installing a blower unit, it becomes possible to selectively supply cold air or hot air to each individual air conditioning zone independently by the switching means, and supply enough air to maintain an appropriate thermal environment. Since it is possible to reduce the blower power by sending only the amount by the variable air volume control means, it is possible to construct a system capable of responding to the heat load request for each individual air conditioning zone in detail in energy saving operation. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an air heat source type air conditioning system constructed according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a schematic structure of a heat source unit 10 used in an air heat source type air conditioning system constructed according to the present invention. FIG. 1 (A) shows the front surface of the heat source unit 10. FIG. 1B is a left side view of the heat source unit 10. The heat source unit 10 includes an individual heat storage tank ST, a heat storage tank circuit A in which a first heat medium such as heat storage water circulates, a compressor COMP and an expansion valve EV, and a second heat medium such as a refrigerant circulates. And a heat-exhaust circuit C that includes a first heat exchanger EX1 of a gas-liquid contact type and circulates a third heat medium such as cooling water. These circuits are all substantially rectangular parallelepiped. It is integrally housed in the casing 12. The outside air intake OA is attached to the left side surface of the casing 12, and the return air port RA is attached to the right side surface thereof. Further, on the upper surface of the casing 12, an exhaust port EA equipped with an exhaust fan OF is provided.
At the same time, a first air supply port SA1 having the first air supply fan F1 and a second air supply port SA2 having the second air supply fan F2 are attached.

The heat storage tank circuit A in which the heat storage water as the first heat medium circulates is provided below the individual heat storage tank ST arranged below the casing 12 and the first air supply port SA1. A second heat exchanger EX such as a fine coil that exchanges heat between the supply air flowing through the first supply path and the heat storage water.
2, a third heat exchanger EX3 such as an ice making (hot water) coil arranged in the individual heat storage tank ST for exchanging heat between the heat storage water and the refrigerant, and the heat storage water arranged above the individual heat storage tank ST. And a fourth heat exchanger EX4, which is a water-side heat exchanger for exchanging heat with the refrigerant.

The heat pump circuit B in which the refrigerant as the second heat medium circulates is installed in the individual heat storage tank ST, and a third heat exchanger EX3 for exchanging heat between the heat storage water and the refrigerant,
A fourth heat exchanger EX4 installed outside the individual heat storage tank ST for exchanging heat between the heat storage water and the refrigerant, and a first air supply port SA1.
A fifth heat exchanger, which is an air-side heat exchanger that is arranged below the second heat exchanger EX2 and substantially overlaps with the second heat exchanger EX2 to exchange heat between the supply air flowing in the first supply path and the refrigerant. EX5 and the second
Of the sixth heat exchanger E arranged below the air supply port SA2 to exchange heat between the supply air flowing in the second supply path and the refrigerant.
And a seventh heat exchanger EX7, which is a water-side heat exchanger that is arranged above the individual heat storage tank ST together with the fourth heat exchanger EX4 to exchange heat between the refrigerant and the cooling water. Has been done.

Further, the exhaust heat circuit C in which the cooling water which is the third heat medium circulates is, for example, the first heat exchanger EX1 which is a gas-liquid contact type heat exchanger using a small cooling tower, the refrigerant and the cooling. It is composed of a seventh heat exchanger EX7 for exchanging heat with water.

The arrangement of one embodiment of the heat source unit 10 constructed according to the present invention has been described above with reference to FIG. 1, but the present invention is not limited to this embodiment.
It is needless to say that those skilled in the art can adopt various arrangement configurations and have the same operational effects, and those modifications and improvements belong to the technical scope described in the claims of the present invention. Yes.

The present invention can be better understood by knowing the operation in various operation modes with reference to the system diagrams of the heat medium piping and the air path of the heat source unit 10 shown in FIGS. 3 to 20. It is possible. It should be noted that in FIGS. 3 to 20, the arrangement configuration of each device is substantially the same, but according to various operation modes, the device being driven is shown by a solid line, and the device at rest is shown by a dotted line. It is easy to understand.

As shown, the heat storage tank circuit A includes a three-way valve V
The T1 and the pump P1 are interposed, and the heat storage water can be selectively circulated to either the second heat exchanger EX2 or the fourth heat exchanger EX4 depending on the operation mode. The heat pump circuit B includes a four-way valve RV, open / close valves V1, V2, V3, V4, V5, V6, V7 and V8, a compressor COMP, and an expansion valve EV.
It is possible to configure an optimum heat pump circuit according to the operation mode. Further, in the heat exhaust circuit C, a pump P2
Is installed, and the first cooling water is provided according to the operation mode.
The heat exchanger EX1 of FIG. Also, a damper V is installed in the air path.
D1, VD2, VD3, and VD4 are provided, and are configured so that an optimum air path can be formed according to the operation mode.

The heat source unit 10 configured as described above
Can be operated in each operation mode shown in FIG. Next, each operation mode will be described with reference to the drawings.

1. Heat storage operation mode (1) Ice heat storage mode In the ice heat storage mode, as shown in FIG. 3, the pump P1 is stopped and the heat storage tank circuit A is not operated. Then, the valves V2, V4, V6 are turned on, and the valves V1, V3,
V5, V7, and V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP → four-way valve RV → sixth heat exchanger EX6 (passing only) → valve V6 → seventh heat exchanger E.
X7 → fourth heat exchanger EX4 (passing only) → expansion valve EV
→ Valve V2 → Third heat exchanger EX3 → Valve V4 → Four-way valve RV → Compresser COMP is circulated in order to make the third heat exchanger EX3 function as an evaporator, and the seventh heat exchanger E
A heat pump circuit B that causes X7 to function as a condenser is configured, and the pump P2 is driven to circulate cooling water in the exhaust heat circuit C. Further, the first air supply fan F1 and the exhaust fan OF are driven, and the dampers VD1, VD
By closing 2 and closing the dampers VD3, VD4, the return air of the indoor air that has been supplied indoors from the air supply port OA by the first air supply fan F1 is taken in by the exhaust fan OF from the return air port RA. , The heat extracted from the heat storage water in the heat storage tank ST is used as a seventh heat exchanger EX7 and a gas-liquid contact type first heat exchanger.
By radiating heat to the exhaust gas through the heat exchanger EX1 of the heat storage unit ST1, the heat storage tank ST is used, for example, by using inexpensive electric power at night
It is possible to store cold heat in the form of ice or cold water.

(2) Hot water heat storage mode In the hot water heat storage mode, as shown in FIG.
1, P2 is stopped and neither the heat storage tank circuit A nor the heat exhaust circuit C is operated. And valves V5, V7, V8
Is turned on, the valves V1, V2, V3, V4, V6 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COM.
P → four-way valve RV → valve V7 → third heat exchanger EX3 →
The valve V8 → the expansion valve EV → the valve V5 → the sixth heat exchanger EX6 → the four-way valve RX → the compressor COMP is circulated in sequence,
A heat pump circuit B that causes the sixth heat exchanger EX6 to function as an evaporator and causes the third heat exchanger EX3 to function as a condenser is configured. Further, by driving the exhaust fan OF, closing the dampers VD1, VD3, VD4 and opening / closing the damper VD2, the sixth heat exchanger EX from the outside air taken in from the air supply port OA by the exhaust fan OF.
By radiating the heat removed by 6 to the heat storage water in the heat storage tank ST via the third heat exchanger EX3, the heat is stored in the heat storage tank ST as hot water by using inexpensive electric power at night, for example. It is possible to

2. Air Conditioning Operation Mode According to the present invention, it is possible to operate the heat source unit 10 according to various operation modes as shown in FIG. 2, depending on the type of heat load required, the heat storage mode, and whether or not to perform heat recovery. is there. Hereinafter, each operation mode will be described in detail with reference to FIGS. 5 to 20.

A. Cooling operation mode (1) b mode (cooling partial load (small load), ice heat storage, no heat recovery) Cold heat is stored as ice or cold water in the heat storage tank ST, and the air conditioning load required in each air conditioning zone is In the case of the cooling partial load, first, the heat source unit 10 can be driven in the b mode as shown in FIG. In the b mode, the heat storage tank circuit A is operated by driving the pump P1. Then, the first air supply fan F1
And three-way valve VT while driving the exhaust fan OF
1, VT2 is switched to the second heat exchanger EX2 side, the cold heat is taken out by the second heat exchanger EX2, and the supply air flowing through the first supply air passage is cooled to obtain the required cooling load. It is possible to correspond to. In the b-mode operation, the dampers VD1 and VD2 are closed and the dampers VD3 and VD4 are opened, so that a part of the return air from the room is exhausted and a part is returned by the second heat exchanger EX2. It is cooled and air is supplied again to the room. Also, in this case,
The compressor COMP and the pump P2 are stopped, and the heat pump circuit B and the exhaust heat circuit C are not operated. As described above, by the b-mode operation, it is possible to supply the cool air from the first air supply path and deal with the cooling partial load.

(2) a1 mode (maximum cooling load, no ice storage, no heat recovery) Further, even in the b mode, when the cooling maximum load cannot meet the required cooling load in each air conditioning zone, It is possible to drive the heat source unit 10 in the a1 mode as shown in FIG. In the a1 mode, the heat storage tank circuit A and the heat exhaust circuit C are operated by driving the pump P1 and the pump P2. Then, the three-way valves VT1 and VT2 are switched to the second heat exchanger EX2 side, the cold heat is pumped out by the second heat exchanger EX2, and the supply air flowing through the first supply path is cooled. Then, the valves V1, V3, V6 are turned on, and the valves V2, V4, V
5, V7, V8 are turned off, the four-way valve RV is switched,
Refrigerant compressor COMP → sixth heat exchanger EX6 (passing only) → valve V6 → seventh heat exchanger EX7 → fourth heat exchanger EX4 (passing only) → expansion valve EV → valve V1 → fifth Heat pump EX5 → valve V3 → four-way valve RV → compressor COMP is sequentially circulated to make the fifth heat exchanger EX5 function as an evaporator and the seventh heat exchanger EX7 function as a condenser B Make up. Then, the dampers VD3 and VD4 are opened, the dampers VD1 and VD2 are closed, and the first air supply fan F1 and the exhaust fan OF are driven to take in from the air supply port OA and supply from the first air supply port SA1. The air to be taken is removed by the fifth heat exchanger EX5 to be cooled, and the heat is returned through the seventh heat exchanger EX7 and the gas-liquid contact type first heat exchanger EX1.
It is possible to remove heat during the exhaust air sent from A to the exhaust port EA. As described above, in the a1 mode, since the air can be cooled by the second heat exchanger EX2 and the fifth heat exchanger EX5 and supplied from the first air supply path, the required heat load can be reduced. It is possible to handle even the maximum load.

(3) a2 mode (maximum cooling load, no ice heat storage, no heat recovery) In the case of maximum cooling load, the heat source unit 10 can be operated in the a2 mode as shown in FIG. .
In the a2 mode, the valves V1, V3, V6 are turned on, the valves V2, V4, V5, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP.
-> 6th heat exchanger EX6 (only passage)-> valve V6-> 7th heat exchanger EX7-> 4th heat exchanger EX4-> expansion valve E
V → Valve V → Fifth Heat Exchanger EX5 → Valve V3 →
Heat pump circuit B in which the four-way valve RV and the compressor COMP are sequentially circulated so that the fifth heat exchanger EX5 functions as an evaporator and the fourth heat exchanger EX4 and the seventh heat exchanger EX7 function as condensers. Make up. Then, while driving the first air supply fan F1 and the exhaust fan OF,
The pump P1 is driven, the three-way valves VT1 and VT2 are switched to the fourth heat exchanger EX4 side, and the heat storage tank ST is used as a waste heat destination of the heat pump circuit B. Furthermore, pump P
It is possible to cope with a large cooling load by driving 2 and exhausting heat even during exhaust by the gas-liquid contact type first heat exchanger EX1. In the b mode operation, the dampers VD1 and VD2 are closed and the dampers VD3 and
Since VD4 is opened, a part of the return air from the room is exhausted, a part is cooled by the second heat exchanger EX2, and the room air is supplied again. As described above, also in the a2 mode, it is possible to supply the cool air, which can cope with a larger cooling load than the first air supply path, to the air-conditioned space. In the operation, the a1 mode is preferentially used, and when the temperature level of the heat storage tank cannot be used as cold water, the operation in the a2 mode can be performed to improve the heat exchange efficiency.

(4) e1 mode (cooling small load, hot water heat storage, no heat recovery) When a cooling small load is required during hot water heat storage, FIG.
It is possible to operate the heat source unit 10 in the e1 mode as shown in FIG. In the e1 mode, the pump P1 is stopped and the heat storage tank circuit A is not operated. And valve V
1, V3, V6 are turned on, and valves V2, V4, V5,
V7 and V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed from the compressor COMP to the sixth heat exchanger EX6 (passing only).
→ valve V6 → seventh heat exchanger EX7 → fourth heat exchanger EX4 (passing only) → expansion valve EV → valve V1 → fifth heat exchanger EX5 → valve V3 → compressor COMP, and sequentially circulate, A heat pump circuit B is configured that causes the fifth heat exchanger EX5 to function as an evaporator and the seventh heat exchanger EX7 to function as a condenser. Further pump P
2 drives the exhaust heat circuit C and drives the first air supply fan F1 and the exhaust fan OF. By configuring the heat source unit 10 in this way, the outside air supplied by the first air supply fan F1 is supplied to the fifth heat exchanger E.
It is cooled by X5, and the heat extracted at that time is radiated into the exhaust air exhausted by the exhaust fan OF via the seventh heat exchanger EX7 and the gas-liquid contact type first heat exchanger EX1. It is possible. In the case of the e1 mode operation, the dampers VD1 and VD2 are closed and the damper VD3,
Since VD4 is opened, a part of the return air from the room is exhausted, a part is cooled by the fifth heat exchanger EX5, and the room air is supplied again. Thus, according to the e1 mode,
It is possible to supply cool air that can handle a smaller heat load than the first air supply path to the air-conditioned space.

(5) e2 mode (with a small cooling load, hot water heat storage, and heat recovery) When a small cooling load is required during hot water heat storage, e1
In addition to the modes, as shown in FIG. 9, the heat source unit 10 can be operated in the e2 mode in which heat is recovered in the heat storage tank ST during the cooling operation. In the e2 mode, the pump P2 is stopped and the exhaust heat circuit C is not operated. Then, the valves V1, V3, V6 are turned on, and the valves V2, V4, V
5, V7, V8 are turned off, the four-way valve RV is switched,
Refrigerant compressor COMP → sixth heat exchanger EX6 (passing only) → valve V6 → seventh heat exchanger EX7 (passing only)
→ The fourth heat exchanger EX4 → Expansion valve EV → Valve V1 → Fifth heat exchanger EX5 → Valve V3 → Compressor COMP is sequentially circulated, and the fifth heat exchanger EX5 functions as an evaporator. A heat pump circuit B that causes the fourth heat exchanger EX4 to function as a condenser is configured. Further, the pump P1 is driven to switch the three-way valves VT1 and VT2 to the fourth heat exchanger EX4 side to operate the heat storage tank circuit A, and at the same time, to drive the first air supply fan F1 and the exhaust fan OF. By configuring the heat source unit 10 in this way, the outside air supplied by the first supply fan F1 is cooled by the fifth heat exchanger EX5, and the heat extracted at that time is removed by the fourth heat exchange. By radiating heat into the heat storage tank ST via the container EX4, it is possible to store hot heat in the heat storage tank ST during the cooling operation. In the case of the e2 mode operation, the dampers VD1 and VD2 are closed and the damper VD3,
Since VD4 is opened, a part of the return air from the room is exhausted, a part is cooled by the second heat exchanger EX2, and the room air is supplied again. Thus, according to the e2 mode,
It is possible to supply cold air that can cope with a cooling load smaller than that of the first air supply path, and at the same time, recover heat from the heat storage tank ST.

(6) c1 mode (simultaneous cooling / heating load, cold> warming / no ice storage / no heat recovery) When heating is also required during cooling operation in which ice storage is being performed (however, if the required cooling load is used) Is larger than the heating load), the heat source unit 10 can be operated in the c1 mode as shown in FIG. In the c1 mode, the pump P1 is driven and the three-way valve V
The heat storage tank circuit A is configured by switching T1 and VT2 to the second heat exchanger EX2 side, the cold heat stored in the heat storage tank ST is taken out, and the outside air taken in by the first air supply fan F1. Is cooled and air is supplied to the room. And
Turn on the valves V1, V3, V6 and turn on the valves V2, V
4, V5, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP → sixth heat exchanger EX6 →
Valve V6 → seventh heat exchanger EX7 → fourth heat exchanger E
X4 (passing only) → expansion valve EV → valve V1 → fifth heat exchanger EX5 → valve V3 → compressor COMP in order to make the fifth heat exchanger EX5 function as an evaporator and Heat exchanger EX6 and seventh heat exchanger E
A heat pump circuit B that causes X7 to function as a condenser is configured. Further, the pump P2 is driven to operate the exhaust heat circuit C, and at the same time, the first air supply fan F1, the second air supply fan F2 and the exhaust fan OF are driven to drive the damper VD1,
VD3 and VD4 are opened and damper VD2 is closed. By configuring the heat source unit 10 in this way, the first
In addition to the second heat exchanger EX2 of the heat storage tank circuit A, the outside air supplied by the air supply fan F1 can also be cooled by the fifth heat exchanger EX5 of the heat pump circuit B. At this time, the heat extracted by the fifth heat exchanger EX5 can be used for warming the outside air supplied by the second air supply fan F2 via the sixth heat exchanger EX6. . Then, it is possible to dissipate excess heat into the air exhausted by the exhaust fan OF via the seventh heat exchanger EX7 and the gas-liquid contact type first heat exchanger EX1. Thus, according to the c1 mode,
It is possible to supply cool air that can cope with a cooling load larger than that of the first air supply path to the air-conditioned space, and warm air that can cope with a smaller heating load than that of the second air supply path. In operation, it is possible to operate in the c1 mode when the cooling load is larger than the heating load, and to operate in the c2 mode when the heating load is larger than the cooling load.

(7) c4 mode (simultaneous cooling / heating load, cold> warming / ice storage / no heat recovery) When heating is also required during cooling operation in which ice storage is being performed (however, the required cooling load If the load is larger than the heating load), the heat source unit 10 can be operated in the c4 mode as shown in FIG. 11 in addition to the c1 mode. In the c4 mode, the pump P1 is driven and, unlike the c1 mode, the three-way valve VT
1 and VT2 are switched to the fourth heat exchanger EX4 side to form the heat storage tank circuit A. And the valves V1 and V
3, V6 is turned on, valves V2, V4, V5, V7,
V8 is turned off, the four-way valve RV is switched, and the refrigerant is changed from the compressor COMP to the sixth heat exchanger EX6 to the valve V6 to the seventh.
Heat exchanger EX7 → fourth heat exchanger EX4 (passing only)
→ Expansion valve EV → Valve V1 → Fifth heat exchanger EX5 → Valve V3 → Compressor COMP is circulated in order to make the fifth heat exchanger EX5 function as an evaporator and the fourth heat exchanger EX4, A heat pump circuit B that causes the sixth heat exchanger EX6 and the seventh heat exchanger EX7 to function as a condenser is configured. Further, the pump P2 is driven to operate the exhaust heat circuit C, and at the same time, the first air supply fan F1, the second air supply fan F2 and the exhaust fan OF are driven to drive the damper V.
D1, VD3, VD4 are opened and damper VD2 is closed. By configuring the heat source unit 10 in this way, it is possible to cool the outside air supplied by the first air supply fan F1 by the fifth heat exchanger EX5, and at that time, the fifth heat exchange is performed. The heat extracted by the heat exchanger EX5 is supplied to the second air supply fan F through the sixth heat exchanger EX6.
2 can be used to warm the outside air supplied. Then, the excess heat is radiated to the air exhausted by the exhaust fan OF via the seventh heat exchanger EX7 and the gas-liquid contact type first heat exchanger EX1, and at the same time the fourth heat exchange is performed. It is possible to radiate heat into the heat storage tank ST via the container EX4. As described above, according to the c4 mode, it is possible to supply the cool air that can cope with a cooling load larger than that of the first air supply path and the warm air that can correspond to a smaller heating load than that of the second air supply path to the air-conditioned space. It is possible.

(8) f2 mode (simultaneous cooling / heating load, cold> warming / warm water heat storage / no heat recovery) When cooling / heating load is simultaneously requested during hot water heat storage,
It is possible to operate the heat source unit 10 in the f2 mode as shown in FIG. In the f2 mode, the pump P
1 stops and the heat storage tank circuit A does not operate. Then, the valves V1, V3, V6 are turned on, and the valves V2, V4, V
5, V7, V8 are turned off, the four-way valve RV is switched,
Refrigerant is transferred to compressor COMP → sixth heat exchanger EX6 → valve V6 → seventh heat exchanger EX7 → fourth heat exchanger EX4
(Passing only) → Expansion valve EV → Valve V1 → Fifth heat exchanger EX5 → Valve V3 → Compressor COMP in order to make the fifth heat exchanger EX5 function as an evaporator and at the same time to heat the sixth heat. Exchanger EX6 and seventh heat exchanger EX
A heat pump circuit B that causes 7 to function as a condenser is configured. Further, the pump P2 is driven to operate the exhaust heat circuit C, and at the same time, the first air supply fan F1, the second air supply fan F2, and the exhaust fan OF are driven to drive the dampers VD1 and VD.
D3 and VD4 are opened and damper VD2 is closed. By configuring the heat source unit 10 in this way, it is possible to cool the outside air supplied by the first air supply fan F1 by the fifth heat exchanger EX5, and at that time, the fifth heat exchange is performed. The heat extracted by the device EX5 can be used to warm the outside air supplied by the second supply fan F2 via the sixth heat exchanger EX6. Then, the excessive heat is further exhausted through the seventh heat exchanger EX7 and the gas-liquid contact type first heat exchanger EX1 to the exhaust fan O.
It is possible to dissipate heat into the air exhausted by F. As described above, according to the f2 mode, the first air supply path supplies the cool air that can cope with the cooling load, and the second air supply path supplies the warm air that can accommodate the heating load.

(9) f3 mode (simultaneous cooling / heating load, cold> warm / hot water heat storage / heat recovery) When cooling / heating loads are requested simultaneously during hot water heat storage,
In addition to the f2 mode, as shown in FIG. 13, the heat storage tank ST
It is possible to operate the heat source unit 10 in the f3 mode in which the heat is recovered. In the f3 mode, the pump P1 is driven to switch the three-way valves VT1 and VT2 to the fourth heat exchanger EX4 side to form the heat storage tank circuit A. Further, in the f3 mode, the pump P2 is stopped and the exhaust heat circuit C is not operated. And the valves V1, V3, V
6 is turned on, the valves V2, V4, V5, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor CO.
MP → sixth heat exchanger EX6 → valve V6 → seventh heat exchanger EX7 (passing only) → fourth heat exchanger EX4 → expansion valve EV → valve V1 → fifth heat exchanger EX5 → valve V
The third heat exchanger E is circulated in sequence from 3 → compressor COMP.
A heat pump circuit B that causes X5 to function as an evaporator and causes the sixth heat exchanger EX6 to function as a condenser.
Is configured. Further, the first air supply fan F1, the second air supply fan F2, and the exhaust fan OF are driven to drive the damper VD.
1, VD3 and VD4 are opened and the damper VD2 is closed. By configuring the heat source unit 10 in this way, it becomes possible to cool the outside air supplied by the first air supply fan F1 by the fifth heat exchanger EX5,
At that time, the heat extracted by the fifth heat exchanger EX5 can be used for warming the outside air supplied by the second air supply fan F2 through the sixth heat exchanger EX6. Become. Then, the extra heat is added to the fourth heat exchanger EX.
It is possible to store heat as warm heat in the heat storage tank ST via 4. As described above, according to the f3 mode, the cool air that can handle a larger cooling load than the first air supply path is supplied, the warm air that can support a smaller heating load than the second air supply path is supplied, and the air conditioning operation is performed. It is possible at times to collect warm heat in the heat storage tank ST.

(10) c3 mode (cooling and heating simultaneous load, warming>
Cooling / ice storage / heat recovery) When the cooling / heating load is requested at the same time during ice storage, and the required heating load is larger than the cooling load, the heat source unit 10 is set in the c3 mode as shown in FIG. It is possible to drive. Pump c in c3 mode
1 and P2 are stopped, and both the heat storage tank circuit A and the exhaust heat circuit C are stopped. Then, the valves V1, V3, V6 are turned on, the valves V2, V4, V5, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP →
Sixth heat exchanger EX6 → Valve V6 → Seventh heat exchanger E
X7 (pass only) → 4th heat exchanger EX4 (pass only)
→ Expansion valve EV → Valve V1 → Fifth heat exchanger EX5 → Valve V3 → Compressor COMP is circulated in order to make the fifth heat exchanger EX5 function as an evaporator and the sixth heat exchanger EX6. A heat pump circuit B that functions as a condenser is configured. Further, the first air supply fan F1, the second
The air supply fan F2 and the exhaust fan OF are driven to open the dampers VD1, VD3, VD4 and close the damper VD2. By configuring the heat source unit 10 in this way, the cold heat obtained as a result of warming the outside air taken in by the second air supply fan F2 is supplied to the first air supply fan F1 by the fifth heat exchanger EX5. It can be used to cool the supplied outside air.

In the c3 mode, when the cooling load disappears, the valves V2, V4 and V6 are turned on, and the valves V1, V3, V5, V7 and V8 are turned off so that the refrigerant is compressed. COMP → four-way valve R
V → sixth heat exchanger EX6 → valve V6 → seventh heat exchanger EX7 (passing only) → fourth heat exchanger EX4 (passing only) → expansion valve EV → valve V2 → third heat exchanger EX3
→ Valve V4 → Four-way valve RV → Compressor COMP is circulated in order, and the third heat exchanger EX3 is made to function as an evaporator
A heat pump circuit that causes the sixth heat exchanger EX6 to function as a condenser is configured, and a second heat exchanger is formed by the sixth heat exchanger EX6.
The cold heat obtained as a result of warming the supply air flowing through the supply path can be stored as the cold heat in the heat storage tank ST via the third heat exchanger EX3.

(11) d2 mode (partial heating load (small heating load), ice heat storage, heat recovery) When a partial heating load is required during the cooling operation, the d2 mode as shown in FIG. 15 is used. Heat source unit 10
It is possible to drive. In the d2 mode, the pumps P1 and P2 are stopped and the heat storage tank circuit A and the exhaust heat circuit C
Both do not drive. And the valves V2, V
4, V6 is turned on, and valves V1, V3, V4, V5,
V7 and V8 are turned off, the four-way valve RV is switched, and the refrigerant is changed to compressor COMP → four-way valve RV → sixth heat exchanger EX.
6-> 7th heat exchanger EX7 (only passage)-> 4th heat exchanger EX4 (only passage)-> expansion valve EV-> valve V2-> 3rd
Heat exchanger EX3 → valve V4 → four-way valve RV → compressor in order to cause the sixth heat exchanger EX6 to function as a condenser and the third heat exchanger EX3 to function as an evaporator. Configure B. The second
The air supply fan F2 and the exhaust fan OF are driven to open the dampers VD1, VD3, VD4 and close the damper VD2. With the heat source unit 10 configured in this way,
The outside air taken in by the second air supply fan F2 is warmed by the sixth heat exchanger EX6, and the cold heat obtained by the heat exchange is stored in the heat storage tank ST via the third heat exchanger EX3. Is possible. As described above, according to the d2 mode, it is possible to supply warm air that can cope with the heating partial load from the second air supply path, and at the same time, recover cold heat to the heat storage tank ST.

B. Heating operation mode (1) g mode (small heating load, hot water heat storage, no heat recovery) When hot water heat is stored in the heat storage tank and a heating load is required in the air-conditioned space, first, as shown in FIG. G mode operation is performed. In the g mode, the compressor COMP and the pump 2 are stopped and the heat pump circuit B
And the exhaust heat circuit C is not operated. Then, the pump P1 is operated and the three-way valves VT1 and VT2 are connected to the second heat exchanger EX2.
Switched to the side. Further, the first intake fan F1 and the exhaust fan OF are driven, the dampers VD3 and VD4 are opened, and the dampers VD1 and VD2 are closed. By configuring the heat source unit 10 in this way, the outside air taken in by the first intake fan F1 is transferred to the second heat exchanger EX2.
It becomes possible to heat up.

(2) h mode (Heating heavy load, hot water heat storage,
No Heat Recovery) When a larger heating load is required in the air-conditioned space and the g-mode operation is insufficient, it is possible to operate the heat source unit 10 in the h-mode as shown in FIG. In the h mode, the pump P1 is driven,
The three-way valves VT1 and VT2 are switched to the second heat exchanger EX2 side to configure the heat storage tank circuit A, and the first intake fan F1.
It is possible to warm the outside air taken in by the second heat exchanger EX2. Further, the valves V1, V3, V5 are turned on, the valves V2, V4, V6, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP.
→ Valve V3 → Fifth heat exchanger EX5 → Valve V1 → Expansion valve EV → Sixth heat exchanger EX6 → Four-way valve RV → Compressor circulates sequentially, and the sixth heat exchanger EX6 is used as an evaporator. A heat pump circuit B that functions and causes the fifth heat exchanger EX5 to function as a condenser is configured. And
The first intake fan F1 and the exhaust fan OF are driven to open the dampers VD2 and VD4 and close the dampers VD1 and VD3. Further, the pump P2 is stopped and the heat exhaust circuit C is not operated. By configuring the heat source unit 10 in this manner, the outside air taken in by the first intake fan F1 is added to the second heat exchanger EX2 of the heat storage tank circuit A, and the fifth heat exchanger of the heat pump circuit B is added. It is also possible to heat by the EX5, and the cold heat resulting from the heat exchange by the fifth heat exchanger EX5 can be radiated to the exhaust air exhausted by the exhaust fan OF via the sixth heat exchanger EX6. It will be possible. Thus, according to the h mode, the first
It is possible to supply warm air that can meet a large heating load request to the air-conditioned space from the air supply path.

(3) d1 mode (partial heating for heating, ice heat storage, no heat recovery) When a partial heating for heating is requested in the air-conditioned space when ice heat storage is being performed, as shown in FIG. d1
It is possible to operate the heat source unit 10 in the mode. In the d1 mode, the pumps P1 and P2 are stopped and the heat storage tank circuit A and the heat exhaust circuit C are not operated.
Then, the valves V1, V3, and V5 are turned on, and the valve V
Turn off 2, V4, V6, V7, and V8, and use the four-way valve RV
To switch the refrigerant to the compressor COMP → four-way valve RV → valve V3 → fifth heat exchanger EX5 → valve V1 → expansion valve EV → valve V5 → sixth heat exchanger EX6 → four-way valve RV.
→ The fifth heat exchanger E is circulated in sequence with the compressor COMP.
A heat pump circuit B is constituted in which X5 functions as a condenser and the sixth heat exchanger EX6 functions as an evaporator. Further, the first intake fan F1 and the exhaust fan OF are driven to open the dampers VD2 and VD4, and the damper VD
1. Close VD3. With the configuration of the heat source unit 10, the outside air taken in by the first intake fan F1 is warmed by the fifth heat exchanger EX5, and the resulting cold heat is discharged into the exhaust air exhausted by the exhaust fan OF into the sixth air.
It is possible to radiate heat via the heat exchanger EX6.
As described above, according to the d1 mode, it is possible to supply warm air that can cope with the heating partial load to the air-conditioned space from the first air supply path.

(4) f1 mode (cooling / heating simultaneous load, warming> cold / hot water heat storage / no heat recovery) At the time of hot water heat storage, a cooling / heating load is simultaneously requested in the air-conditioned space, and the required heating load is higher than the cooling load When it is larger, it is possible to operate the heat source unit 10 in the f1 mode as shown in FIG. In the f1 mode, the pump P1 is driven to drive the three-way valves VT1 and VT.
2 is switched to the second heat exchanger EX2 side so that the outside air sucked by the first intake fan F1 is transferred to the second heat exchanger EX2.
It can be warmed up by 2. And valve V
1, V3, V6 are turned on, and valves V2, V4, V5,
By turning off the four-way valve RV by turning off V7 and V8, the refrigerant is changed from the compressor COMP to the valve V3 to the fifth heat exchanger EX5 to the valve V1 to the expansion valve EV to the fourth heat exchanger EX4 (passing only). → 7th heat exchanger EX7 (passing only) → valve 6 → sixth heat exchanger EX6 → four-way valve RV →
The fifth heat exchanger EX5 is circulated in sequence with the compressor COMP.
To function as a condenser and the sixth heat exchanger EX6 functions as an evaporator. Further, the first intake fan F1 and the exhaust fan OF are driven to open the dampers VD1, VD2, VD4, and the damper V
Close D3. By configuring the heat source unit 10 in this way, the outside air taken in by the first intake fan F1 is added to the second heat exchanger EX2 of the heat storage tank circuit A, and the fifth heat exchange of the heat pump circuit B is performed. It is also possible to heat by using the device EX5, and this fifth heat exchanger EX
A part of the cold heat obtained by the heat exchange by 5 is used for cooling the second supply air by the second intake fan F2 via the sixth heat exchanger EX6, and the rest is the exhaust fan OF. The heat is dissipated in the exhaust air exhausted by. As described above, according to the f1 mode, warm air that can cope with a large heating load is supplied from the first air supply path, and the second air is supplied.
It is possible to supply the cool air that can cope with a small cooling load from the air supply path.

(5) c2 mode (simultaneous cooling / heating load, warming> no cooling / ice heat storage / heat recovery) When a cooling / heating simultaneous load is required during ice storage and the required heating load is larger than the cooling load, It is possible to operate the heat source unit 10 in the c2 mode as shown in FIG. In the c2 mode, pumps P1 and P2
Is stopped and both the heat storage tank circuit A and the heat exhaust circuit C are not operated. Then, the valves V1, V3 and V5 are turned on,
By turning off the valves V2, V4 and V6 and switching the four-way valve RV, the refrigerant is compressed from the compressor COMP to the four-way valve R.
V → Valve V3 → Fifth Heat Exchanger EX5 → Valve V1 →
The expansion valve EV → the valve V5 → the sixth heat exchanger EX6 → the four-way valve RV → the compressor COMP are sequentially circulated to make the fifth heat exchanger EX5 function as a condenser, and the sixth heat exchanger EX.
A heat pump circuit B that causes 6 to function as an evaporator is configured. Further, the first intake fan F1, the second intake fan F2, and the exhaust fan OF are driven to drive the dampers VD1, VD.
D2 and VD4 are opened and damper VD3 is closed. By configuring the heat source unit 10 in this way, the outside air taken in by the first intake fan F1 is supplied to the fifth heat exchanger E.
Along with warming by X5, part of the resulting cold heat is used to cool the air supplied by the second air supply fan F2 via the sixth heat exchanger EX6,
The remaining portion is radiated into the air exhausted by the exhaust fan OF. As described above, according to the c2 mode, warm air that can handle a large heating load is supplied from the first air supply path, and cold air that can support a small cooling load can be supplied from the second air supply path. Is possible.

For the various operation modes configured as described above, an optimum operation mode is appropriately selected according to a control flow as shown in FIG. 26, for example, and various heat load requirements required in the air-conditioned space can be met. It is possible.

First, in step 1, it is judged whether the temperature of the heat storage tank is 10 ° C. or lower, and if it is 10 ° C. or lower, the process proceeds to step 2 and the load required on the secondary side is the cooling load. If it is only the cooling load, the process proceeds to step 3, where a1, a
The cooling operation in the b mode is performed. As described above, the a1 mode is preferentially selected when the cooling load is large, and the a2 mode is selected when the temperature of the heat storage tank is inappropriate for use as cold water. It When the cooling load is small, the b mode is selected. On the other hand, when it is determined in step 2 that the load required on the secondary side is not only cooling, the process proceeds to step 4, and it is determined whether only the heating load is required, and only the heating operation is performed. Is requested, then in step 5, d1 mode is selected. When it is determined in step 4 that the heating load is not the only heating load, the cooling and heating load is requested at the same time. Therefore, in step 6, it is determined which of the cooling load and the heating load is larger, and the cooling load is the heating load. If the heating load is larger than the cooling load, the c2 mode is selected in step 8 if the heating load is larger than the cooling load.

When the temperature of the heat storage tank is judged to exceed 10 ° C. in step 1, the temperature of the heat storage tank is further increased to 35 ° C. in step 9.
It is determined whether or not And the temperature of the heat storage tank is 3
If the temperature is 5 ° C. or lower, in step 10, as in step 2, it is determined whether only the cooling load is required on the secondary side. If only the cooling load is required, step At 11, the e1 mode is selected. On the other hand, when it is determined in step 10 that only the cooling load is not requested, the process proceeds to step 12, where it is determined whether only the heating load is requested, and only the heating load is requested. When it is determined that the heating load is requested, the magnitude of the heating load is examined in step 13, and when the large heating load is requested, the h mode is selected, and the small heating load is requested. In this case, the g mode is selected. On the other hand, if it is determined in step 12 that only the heating load is not requested, that is, if the cooling and heating load is simultaneously requested, the process proceeds to step 14 and the cooling load and the heating load are large. Are compared. When the heating load is larger than the cooling load, the f1 mode is selected in step 15, but when the cooling load is larger than the heating load, the temperature of the heat storage tank is 35 ° C. or more. It is determined in step 16 whether the heat storage tank temperature is 35 ° C. or higher, and the f2 mode is selected in step 17, and when the heat storage tank temperature is less than 35 ° C., the f3 mode is selected. .

Returning to step 9 again, the temperature of the heat storage tank is set to 3
When it is determined that the temperature is 5 ° C. or higher, it is determined in step 19 whether or not the load required on the secondary side is only the cooling load, as in steps 2 and 10, and only the cooling load is determined. Is requested, the e2 mode is selected in step 20. On the other hand, when it is determined that only the cooling load is not requested, the process proceeds to step 21, and it is determined whether the requested load is only the heating load, and only the heating load is requested. If so, in step 22,
The d2 mode is selected. However, if it is determined in step 21 that not only the heating load is requested, that is, the cooling and heating load is simultaneously requested, in step 23, the magnitudes of the cooling load and the heating load are compared. When the heating load is larger than the cooling load, the c3 mode is selected in step 24, and when the cooling load is larger than the heating load,
In step 25, the c4 mode is selected.

As described above, according to the present invention, various operation modes are available depending on the type of load required on the secondary side and the temperature of the heat storage refrigerant stored in the heat storage tank. By driving the heat source unit, it is possible to supply the conditioned air that is optimal for the required heat load and has excellent thermal efficiency to the secondary side.

When actually installing the heat source unit, the air-conditioned space of an office building or the like is divided into one or more air-conditioning units having a predetermined volume and modularized, and the heat-source unit is installed for each air-conditioning unit. By doing so, it is possible to construct a completely individual distributed air conditioning system. This air-conditioning unit can be set to any volume, but in office buildings, for example, it is possible to set the space defined by the column spacing, and in modern buildings, for example, 7 x 14 m is standard. Therefore, as the air conditioning unit to be applied to this, the role of contacting the outer wall with a width of 7 m
It can be set to 00 m ² . Therefore, the air-conditioning system for the entire air-conditioned space such as a building can be constructed by repeating this air-conditioning unit.

As shown in FIG. 21, the heat source unit 10 is arranged in each air conditioning unit at an appropriate place, and the air conditioning units 2a, 2b, 2c, ... Are provided in each air conditioning zone constituting each air conditioning unit. 2n is arranged and the heat source unit 1
A first air supply path 3 and a second air supply path 4 are provided side by side so that cold air and hot air can be independently blown from 0 to each air conditioning zone. Further, if necessary, sensors 5a, 5b, 5c, ... 5n for detecting the temperature / humidity environment in each zone are installed in each air conditioning zone, and the heat source unit and / or the heat source unit and / or It can also be configured to operate the air supply regulation unit.

The air supply adjusting unit 2 installed in each air-conditioning zone has a cooling / heating switching mechanism (cooling / heating switching unit) 10 for cold air and / or warm air and a variable air volume mechanism (variable air volume unit) as shown in FIG. 22, for example. ) 11 (VAV). As shown in FIG. 22, the cooling / heating switching mechanism 10 includes a drive unit (actuator) 19, a drive shaft, and an opening / closing member 14 to which the operation of the drive shaft is transmitted, and the variable air volume mechanism 11 includes the drive unit. (Actuator) 20 and core 1
6 and a throttle opening 17 capable of adjusting the amount of air supply together with the horizontal movement of the core 16. Further, the air supply adjusting unit 2 is configured independently of the heat source unit 1, and the cold air chamber 1 is configured independently in each air supply adjusting unit 2 via the cold air air supply path 3 and the warm air air supply path 4.
The cold air and / or the hot air supplied to the hot air chamber 13 and the hot air chamber 13 can be selectively switched by opening / closing the switches 14 and 15 installed at the outlets of the respective chambers. The cold air or hot air selected by the cooling / heating switching mechanism 10 is changed in the variable air volume mechanism 11 by the movement of the core 16 to change the air blowing amount of the air supplied from the throttle opening 17 so that each air conditioning zone is opened from the air blowing opening 18. It is possible to adjust the amount of air blown into the room to adjust the room temperature to an optimum value.

The opening / closing member 1 of the air supply adjusting unit 2
4, 15 and the core 16 can be mechanically or electrically driven by the drive units 19 and 20 via the control box based on the temperature signal from the sensor 5 installed in each air conditioning zone. is there.

Further, in the embodiment of FIG. 2, the cooling / heating switching mechanism 10 and the variable air volume mechanism 11 are integrally configured as a unit, but the present invention is not limited to such a configuration. For example, the cooling / heating switching mechanism 10 and the variable air volume mechanism 11 are separately configured, and the cooling / heating switching mechanism 10 is installed in the vicinity of the heat source unit 1 and the variable air volume mechanism 11 is installed in the vicinity of each air conditioning zone. It is also possible to do so.

The above is a detailed description of one embodiment of the air-heat-source air conditioning system constructed according to the present invention.
However, the system of the present invention is not limited to the above embodiment, and can be driven in various operation modes according to various required environmental conditions within the scope of the configuration described in the claims. It goes without saying that it is possible.

FIG. 23 shows a second embodiment of the heat source unit according to the present invention. According to this embodiment, the pipe of the fourth heat exchanger EX4 and the pipe of the seventh heat exchanger EX7 are integrally formed in the same shell, and substantially one of the heat exchangers is used. Is a configuration that can be omitted. As described above, according to the second embodiment, it is possible to realize the same effects as the effects of the first embodiment with a simpler and space-saving configuration.

FIG. 24 shows a third embodiment of the heat source unit according to the present invention. According to this embodiment, the heat storage water circulating in the heat storage tank circuit A and the cooling water circulating in the exhaust heat circuit C are shared, and therefore, the fourth heat exchanger E is used.
The pipes of X4 and the seventh heat exchanger EX7 are also shared, and the device configuration is further simplified. However, in the case of this embodiment, the valves V9, V10, V11, V1
2 is provided, and by switching the valve according to the operation mode, it is possible to use the heat storage water as the heat source water during the heating operation and also use the heat storage water as the cooling water for the condenser during the cooling operation. There is. It is also possible to directly recover the excess heat in the heat storage tank ST.

FIG. 25 shows a fourth embodiment of the heat source unit according to the present invention. In this embodiment, the positions of the fourth heat exchanger EX4 and the seventh heat exchanger EX7 of the first embodiment are exchanged, so that the seventh heat exchanger EX7 is positioned relative to the fourth heat exchanger EX4. It is possible to reduce heat loss.

[0059]

Since the present invention is constructed as described above, it is possible to obtain the following excellent operational effects. That is, by selectively operating the heat exchanger of the heat pump circuit as an evaporator or a condenser according to the operation mode, the type of heat load required in each air-conditioned space such as heating load, cooling load, and cooling / heating simultaneous load. In addition, it is possible to flexibly meet all heat load requirements regardless of size. Further, since only the exhaust gas having a volume equal to or less than the outside air introduced into the air-conditioned space for air quality control can be used as the heat source or heat carrier of the heat source unit, a separate device such as an air conditioner for outside air treatment can be omitted. It is possible to construct an air-heat source type air conditioning system that does not require a heat source of a completely distributed type. Further, since the heat storage tank water can be used as a cold heat source or a warm heat source, it is possible to improve the cooling / heating capacity and COP. In addition, since excess heat can be recovered in the heat storage tank, energy saving operation is possible.

By sequentially arranging the fourth heat exchanger and the seventh heat exchanger of the heat source unit in series on the compressor side of the sixth heat exchanger, the utilization efficiency of the heat storage tank circuit and the exhaust heat circuit is improved. Can be increased. On the other hand, by sequentially arranging the fourth heat exchanger and the seventh heat exchanger of the heat source unit in series on the expansion valve side of the sixth heat exchanger, the seventh heat exchanger during the heating operation can be obtained. It is possible to reduce the heat loss from to the fourth heat exchanger. Further, the fourth heat exchanger and the seventh heat exchanger of the heat source unit are integrally formed in the same shell, so that the device can be simplified.

Also, the heat storage tank circuit and the exhaust heat circuit have a common fourth
The heat source unit is circulated, and the fourth heat exchanger and the seventh heat exchanger of the heat source unit are constituted by a common eighth heat exchanger, and the fourth heat medium is exhausted by the switching means. It is possible to further simplify the configuration of the device by selectively circulating it to the heat storage tank circuit side or the heat storage tank circuit side.

According to another aspect of the present invention, the conditioned space has a predetermined volume, for example, about 7 m × 1 including the outer wall surface.
By dividing into 1 or 2 or more air-conditioning units having 4 m (100 m ² ) and installing the heat source unit configured as described above for each air-conditioning unit,
Since the heat load control and the air quality control are completed individually, the transfer distance of the heat medium and the air is limited, and the heat transfer power can be significantly reduced. Further, since the air conditioning system is configured in the air conditioning section of a predetermined volume, it is possible to achieve the individuality of the thermal environment and the air quality environment while at the same time standardizing the equipment and construction.

The air conditioning unit divided as described above is further divided into one or more individual air conditioning zones, and each individual air conditioning zone is provided with a cold air / warm air switching means and / or a variable air volume control means. By installing a blower unit, it becomes possible to selectively supply cold air or hot air independently to each individual air conditioning zone by the switching means, and to supply air only with feet to maintain an appropriate thermal environment. Since it is possible to reduce the blower power by sending only the amount by the variable air volume control means, it is possible to construct a system capable of responding to the heat load request for each individual air conditioning zone in detail in energy saving operation. .

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic device configuration of a heat source unit of an air heat source type air conditioning system configured according to the present invention.

FIG. 2 is an explanatory diagram showing an operation mode of a heat source unit of an air heat source type air conditioning system configured according to the present invention.

FIG. 3 shows a piping system diagram of a heat source unit of an air heat source system configured according to the present invention in an ice heat storage operation mode.

FIG. 4 shows a piping system diagram in a hot water heat storage operation mode of a heat source unit of an air heat source system configured according to the present invention.

FIG. 5 shows a piping system diagram during b-mode operation of the heat source unit of the air heat source system configured according to the present invention.

FIG. 6 shows a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during a1 mode operation.

FIG. 7 shows a piping system diagram during a2 mode operation of the heat source unit of the air heat source system configured according to the present invention.

FIG. 8 shows a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during the e1 mode operation.

FIG. 9 shows a piping system diagram at the time of the e2 mode operation of the heat source unit of the air heat source system configured according to the present invention.

FIG. 10 shows a piping system diagram of a heat source unit of an air heat source system configured according to the present invention during c1 mode operation.

FIG. 11 shows a piping system diagram of a heat source unit of an air heat source system configured according to the present invention during c4 mode operation.

FIG. 12 shows a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during the f2 mode operation.

FIG. 13 is a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during the f3 mode operation.

FIG. 14 is a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during c3 mode operation.

FIG. 15 is a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during d2 mode operation.

FIG. 16 is a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during the g-mode operation.

FIG. 17 shows a piping system diagram during the h-mode operation of the heat source unit of the air heat source system configured according to the present invention.

FIG. 18 shows a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during d1 mode operation.

FIG. 19 shows a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during the f1 mode operation.

FIG. 20 is a piping system diagram of the heat source unit of the air heat source system configured according to the present invention during c2 mode operation.

FIG. 21 is a configuration diagram showing an arrangement of a heat source unit and a blower unit applicable to an air heat source type individual air conditioning system configured according to the present invention.

FIG. 22 is an explanatory diagram showing a configuration of a blower unit applicable to an air-heat-source type individual air conditioning system configured according to the present invention.

FIG. 23 is a schematic diagram showing a second embodiment of the heat source unit of the air heat source type air conditioning system constructed according to the present invention.

FIG. 24 is a schematic diagram showing a third embodiment of the heat source unit of the air heat source type air conditioning system constructed according to the present invention.

FIG. 25 is a schematic diagram showing the outline of a fourth embodiment of the heat source unit of the air-heat source type air conditioning system constructed according to the present invention.

FIG. 26 is a flow chart showing switching of each operation mode of the air heat source type air conditioning system configured according to the present invention.

FIG. 27 is a flow chart showing switching of each operation mode of the air heat source type air conditioning system configured according to the present invention.

FIG. 28 is a flow chart showing switching of each operation mode of the air heat source type air conditioning system configured according to the present invention.

[Explanation of symbols]

 EX1 gas-liquid contact type first heat exchanger EX2 second heat exchanger EX3 third heat exchanger EX4 fourth heat exchanger EX5 fifth heat exchanger EX6 sixth heat exchanger EX7 seventh Heat exchanger ST Heat storage tank COMP Compressor EV Expansion valve F1 First air supply fan F2 Second air supply fan OF Exhaust fan

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[Procedure amendment]

[Submission date] October 13, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

(3) a2 mode (maximum cooling load, no ice heat storage, no heat recovery) In the case of maximum cooling load, the heat source unit 10 can be operated in the a2 mode as shown in FIG. .
In the a2 mode, the valves V1, V3, V6 are turned on, the valves V2, V4, V5, V7, V8 are turned off, the four-way valve RV is switched, and the refrigerant is compressed by the compressor COMP.
-> 6th heat exchanger EX6 (only passage)-> valve V6-> 7th heat exchanger EX7-> 4th heat exchanger EX4-> expansion valve E
V → Valve V → Fifth Heat Exchanger EX5 → Valve V3 →
A heat pump circuit B in which the four-way valve RV and the compressor COMP are sequentially circulated, the fifth heat exchanger EX5 functions as an evaporator, and the fourth heat exchanger EX4 and the seventh heat exchanger EX7 function as condensers. Make up. Then, while driving the first air supply fan F1 and the exhaust fan OF,
The pump P1 is driven, the three-way valves VT1 and VT2 are switched to the fourth heat exchanger EX4 side, and the heat storage tank ST is used as a waste heat destination of the heat pump circuit B. Furthermore, pump P
It is possible to cope with a large cooling load by driving 2 and exhausting heat even during exhaust by the gas-liquid contact type first heat exchanger EX1. In the case of a2 mode operation, the dampers VD1 and VD2 are closed and the dampers VD3 and
Since VD4 is opened, a part of the return air from the room is exhausted, a part is cooled by the second heat exchanger EX2, and the room air is supplied again. As described above, also in the a2 mode, it is possible to supply the cool air, which can cope with a larger cooling load than the first air supply path, to the air-conditioned space. In the operation, the a1 mode is preferentially used, and when the temperature level of the heat storage tank cannot be used as cold water, the operation in the a2 mode can be performed to improve the heat exchange efficiency.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuma Nakano Inventor Kazuma Nakano 4-17-5 Oyamada, Nakahara-ku, Kanagawa Prefecture 447-B-203 Sejour 447-B-203 (72) Toshiaki Saito 3352-1, Iiyama, Atsugi, Kanagawa Prefecture Stone River Condominium 306 (72) Inventor Masafumi Igarashi 1055-20 Hase, Atsugi City, Kanagawa Prefecture (72) Inventor Yu Yu Senoo 1639 Hase, Atsugi City, Kanagawa Prefecture 1639-202, Long Valley

Claims (9)

[Claims] 1. A heat storage tank circuit that includes first and second air supply paths, at least an individual heat storage tank in which the first heat medium circulates, and a second heat medium that includes a compressor and an expansion valve. An air-heat source type air conditioning system including a heat source unit in which a heat pump circuit in which air is circulated and a waste heat circuit in which a third heat medium is circulated including a gas-liquid contact type first heat exchanger are integrally configured. And the heat storage tank circuit includes at least the individual heat storage tank, and a second heat exchanger that performs heat exchange between the first heat medium and the supply air flowing in the first supply path. A third heat exchanger installed inside the heat storage tank to exchange heat between the first heat medium and the second heat medium; and a first heat medium installed outside the heat storage tank. And a fourth heat exchanger for exchanging heat with the second heat medium, and the heat pump circuit includes at least Fifth performing the third heat exchanger, the fourth heat exchanger, heat exchange with the supply air flowing through the second heat medium and the first air supply path
Heat exchanger, a sixth heat exchanger for exchanging heat between the second heat medium and the supply air flowing in the second supply path, the second heat medium and the third heat exchanger. And a seventh heat exchanger for exchanging heat with the heat medium of, and the exhaust heat circuit is composed of at least the first heat exchanger and the seventh heat exchanger, An air heat source type air conditioning system, wherein the heat exchanger constituting the heat pump circuit is configured to selectively function as a condenser or an evaporator depending on an operation mode. 2. The fourth heat exchanger and the seventh heat exchanger are sequentially arranged in series on the compressor side of the sixth heat exchanger. The air-heat-source type air conditioning system described in. 3. The fourth heat exchanger and the seventh heat exchanger are sequentially arranged in series on the expansion valve side of the sixth heat exchanger. The air-heat-source type air conditioning system described in. 4. The fourth heat exchanger and the seventh heat exchanger are integrally formed in the same shell, as claimed in claim 1, 2 or 3. Air heat source type air conditioning system. 5. The first heat medium and the third heat medium are a common fourth heat medium, and the fourth heat exchanger and the seventh heat exchanger are a common fourth heat medium. 8. The heat exchanger of claim 8, wherein the fourth heat medium can be selectively circulated to the exhaust heat circuit side or the heat storage tank circuit side by a switching means. The air-heat-source type air conditioning system described in. 6. The air-conditioned space 1 or 2 having a predetermined volume.
The air conditioner unit is divided into the above air conditioner units, and the heat source unit is installed for each air conditioner unit.
The air-heat-source type air conditioning system according to any one of 3, 4, and 5. 7. The air-conditioning unit is further divided into one or more individual air-conditioning zones, and a blower unit is installed in each individual air-conditioning zone, and air-conditioning air is selectively supplied from each heat source unit to each blower unit. The air-heat-source type air conditioning system according to claim 6, wherein air supply is possible. 8. The air-conditioning air can be supplied to each of the blower units from the heat source unit via the first air supply path and the second air supply path, and each of the blower units can be supplied with the above-mentioned air-conditioning air. The air heat source type air conditioning system according to claim 7, further comprising a switching unit for switching the air conditioning air supplied from the first air supply path and the second air supply path. 9. The air heat source type air conditioning system according to claim 8, wherein a variable air volume control means is provided in each of the blower units.