JP2899517B2 - Air heat source type air conditioner and air conditioning system - Google Patents

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 conditioner and
The present invention relates to an air heat source type air conditioning system capable of flexibly responding to an air conditioning load requirement of each individual air conditioning space, and excellent in energy saving and space saving.

[0002]

2. Description of the Related Art In recent years, air conditioning systems in office buildings and the like have been changed from a central system to an individual decentralized system in response to an increase in cooling load due to intelligent building functions and a demand for comfortable office environments. It is getting. As air conditioning equipment corresponding to such an individual distributed building air conditioning system, a package type heat pump, a multi-system air conditioner, a wall-through type air conditioner, and the like have been developed.

For example, a typical multi-type air conditioner is
A plurality of indoor units are connected to one outdoor unit,
The system is configured such that operation such as operation stop and room temperature setting can be individually controlled for each indoor unit. Such multi-type air conditioning equipment is excellent for individual operation control characteristics because of its excellent individual operation control characteristics, and it can reduce the heat transfer power compared to central air conditioning, thus significantly reducing energy consumption. It is also noted that it can be done.

However, when installing a multi-system air conditioner, the length and height difference of refrigerant pipes connecting the indoor unit and the outdoor unit vary depending on the installation location. 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 the wall-through type air conditioner is 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 finely respond to individual distribution requests of each air-conditioned space. Unlike a multi-type air conditioner, such a wall-through type air conditioner can omit a refrigerant pipe or the like, but requires a very large amount of air for a heat source and has a COP (performance) of a system. Coefficient) decreases, and depending on the outside air temperature, sufficient air-conditioning capacity cannot be obtained, and the installation location and capacity are limited.
In addition, it is difficult to connect ducts and the like, and therefore, there is a limit to air quality control and thermal environment control, which is a problem.

[0006] Recently, from the viewpoint of energy saving and leveling of electric power demand, a water heat storage system, an ice heat storage system, and the like that make effective use of nighttime electric power have been proposed.
Such a heat storage system in which a part of the air conditioning heat source is covered by inexpensive midnight power has been attracting attention because it can reduce running costs and can also reduce initial costs by improving the utilization rate of the apparatus. Furthermore, in order to reduce the heat transfer power, which is a problem of such a heat storage method, an air conditioner that combines these heat storage methods with the above-described multi-system, package system, or wall-through system, such as a package-type ice heat storage system or a multi-system Ice storage systems are also being developed.

However, even in the air conditioning system incorporating the conventional heat storage system as described above, it is necessary to separately prepare an external air processing air conditioner such as a humidifier or a filter in order to control the air quality. However, the installation place is limited, and maintenance is difficult depending on the system. In addition, in order to adjust the indoor temperature distribution, it is necessary to disperse and arrange small-sized packaged air conditioners, but there are still many problems to be solved, such as not being able to obtain the indoor temperature distribution unlike the all-air system. A solution is needed. Furthermore, conventional individual air conditioning systems
Install equipment for each zone, or use zoning to
Stems need to be considered for each interior perimeter
The design and equipment were complicated. Furthermore, recently
Has a poor cooling capacity due to global warming,
Building an air-conditioning system that can recover heat more efficiently is desired
Have been.

[0008]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above technical point of view. The present invention is intended to reduce energy consumption by reducing heat transfer power and to use nighttime power. Has a higher utilization rate,
Furthermore, since the capacity of the heat source device and the power equipment capacity can be reduced, the initial cost,
It is advantageous in terms of running cost and life cycle cost, and the thermal control function and air quality control function are integrated in the air conditioner, so that the thermal environment and air quality environment required in each individual air conditioning zone can be maintained well. It is suitable for individual decentralized systems because it has excellent individual controllability for each individual air-conditioning space, and it is possible to clearly charge tolls according to use in tenant buildings, etc. When the individual method is adopted, the system maintainability is excellent, and in spite of various installation conditions, omission of refrigerant piping and heat source water piping, omission of on-site construction,
It can be simplified and standardized, and it is different
An object of the present invention is to provide a new and improved air heat source type air conditioning system capable of coping with a zone with one air conditioner, and an operation method thereof.

[0009]

[0010]

[MEANS FOR SOLVING THE PROBLEMS]
The invention according to claim 1 provides an outside air intake (OA) that takes in outside air from outside; an indoor air supply port (SA) that supplies conditioned air to the air conditioning room; An indoor air return port (RA) to be taken in; an outdoor air outlet (EA) for exhausting outside air to the outside; an outdoor air inlet communicating with the indoor air supply port, and the indoor air return port is connected to the room. An air passage selectively communicating with an outside exhaust port and / or the indoor air supply port; and a plurality of heat exchangers (7, 1) interposed in the air passage and including at least an evaporator or a condenser.
4, 15), a compressor (17), and a heat pump circuit provided with a decompression device. The air heat source type air conditioner, wherein the heat pump circuit is provided between the indoor-side return air port and the outdoor-side exhaust port. A gas-liquid contact type first heat exchanger (7) interposed in an air path formed therebetween, and an air path formed between the indoor side return air port and the indoor side air supply port. Interposed,
And a second heat exchanger (14, 15) that can selectively function as a condenser or an evaporator.

According to a second aspect of the present invention, in the air heat source type air conditioner according to the first aspect , an air passage formed between the indoor side return port and the indoor side air supply port is provided. The second heat exchangers (14, 15) to be mounted are composed of a second A heat exchanger (14) and a second B heat exchanger (15); the indoor side return air port and the indoor side air supply port. The air path which communicates with the first air supply line is composed of a first air supply line (4) and a second air supply line (10); the second A heat exchanger (14) is connected to the second air supply line (10). The second B heat exchanger (1
5) is interposed in the first air supply line (4),
The second B heat exchanger (15) is characterized in that it is configured to be able to supply outside air from the outside air intake.

[0012] The invention described in claim 3 is the same as in claim 1.
3. The air heat source type air conditioner according to claim 2 , wherein the heat pump circuit is connected to the second A heat exchanger (14) and the second B heat exchanger (15) and the compressor (17) via a refrigerant pipe. A third heat exchanger (1)
6).

The invention described in claim 4 is the first invention .
In the air heat source type air conditioner according to any one of (2) and (3), the first heat exchanger (7) and the third heat exchanger (1)
6) communicate with each other to form a cooling water circulation path.

According to a fifth aspect of the present invention ,
The air heat source type air conditioner according to any one of 2, 3, or 4 , further comprising a heat storage tank (21), wherein the fourth heat exchanger (22) for recovering heat stored in the heat storage tank is provided with the fourth heat exchanger (22). It is characterized in that it is interposed in an air path connecting the outside air intake and the indoor side air supply port.

[0015] The invention described in claim 6 is the same as in claim 4.
Other in air-source type air conditioner according to 5, as characterized by a fifth heat exchanger connected to the heat pump circuit through the refrigerant pipe (26) is installed in the heat storage tank (21) I have.

[0016] The invention described in claim 7 is the same as the invention.
The air heat source type air conditioner according to any one of 1, 2, 3, 4, 5, 6, and 7 , wherein a humidifier and / or a filter is provided in an air path upstream of the indoor air supply port. Features.

According to the eighth aspect , the air-conditioned space is divided into one or two or more air-conditioning units having a predetermined volume . 6,
An air conditioning system is provided, wherein the air heat source type air conditioner according to any one of 7 or 8 is installed.

According to a ninth aspect of the present invention, in the air heat source type air conditioning system according to the eighth aspect , the air conditioning unit is further divided into one or more individual air conditioning zones, and air is blown for each individual air conditioning zone. Install the unit (30),
It is characterized in that air-conditioning air can be selectively supplied to each of the blower units (30) from the indoor side air supply port of the air heat source type air conditioner.

The invention according to claim 10 is the ninth invention.
In the air heat source type air conditioning system according to the above, the pipe means for selectively supplying air for air conditioning from the indoor side air supply port of the air heat source type air conditioner to each of the blower units (30), The first air supply line (4) and the second air supply line (1
0) first air supply conduits (31a) communicating with each other separately.
And the second air supply line (31b). Further, the air-conditioning air supplied from the first air supply line (31a) and the second air supply line (31b) to the air supply units (30), respectively. A means (31) for switching and / or mixing is provided.

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

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

FIG. 1 shows a schematic configuration of a heat source unit 1 applicable to an embodiment of an air heat source type air conditioning system configured according to the present invention. The heat source unit 1 is a package type unit integrally housed in an appropriate housing 2 as shown in the figure, and has four intake / exhaust ports, namely, an outside air intake (OA) and an indoor air supply port (S).
A), an indoor return air outlet (RA) and an outdoor air outlet (E
A) is provided. These inlets and outlets are basically
The first supply duct for fresh air intake (OA) and indoor air supply opening (SA) is provided with a first air supply fan 3 can be variably controlling the rotational speed
4 , an indoor return air port (RA) and an outdoor air outlet (EA) are communicated by an exhaust pipe 6 provided with a second exhaust fan 5 capable of variably controlling the number of revolutions. The outside air taken in through the inlet (OA) is supplied to the indoor air supply port (S
A) is introduced into the air-conditioned space via A), and the air returned from the air-conditioned space can be sucked in from the indoor air return opening (RA) and exhausted to the outside through the outdoor air outlet (EA). Have been.

However, according to this embodiment, the exhaust pipe 6
Is branched by a branch passage 8 on the upstream side of the first heat exchanger 7 interposed in the middle of the pipeline. The branch passage 8 further branches on its downstream side by branch passages 8a and 8b, of which the branch passage 8a communicates with a second air supply line 10 in which a second air supply fan 9 is interposed, and the indoor air return is provided. The indoor return airflow returned from the mouth (RA) can be supplied again into the air-conditioned space via the second air supply line 10 . Branch 8
b also communicates with the first air supply line 4 described above, and the indoor exhaust air flow returned from the indoor air return port (RA) is supplied to the first air supply line 4.
It is possible to supply air into the air-conditioned space again via the pipe 4 . With such a configuration, the circulating air can be used for maintaining the heat transfer medium and the indoor cleanliness. The branch passage 8a is further configured to branch further by the branch passage 8c so that a part of the return air flowing through the branch passage 8a can escape to the exhaust pipe 6.

According to the present embodiment , the air paths are configured as described above, and a desired air path can be formed by switching the damper means appropriately arranged in each path. . For example, in the illustrated example, the first
A damper means 11 is interposed in the branch line 8c to transfer a part of the airflow flowing from the branch line 8a to the second supply line 10 to the exhaust line 6.
You can escape. The second supply line 10 has a second
Of the second supply if necessary.
The conduit 10 can be shut off. Further, a third damper means 13 is provided on the upstream side of the first heat exchanger 7 interposed in the exhaust pipe 6, so that the air flowing into the first heat exchanger 7 and the exhaust pipe 6 is required. It is possible to cut off according to.

Further, according to the present embodiment, a plurality of heat exchangers are arranged in the air path configured as described above. That is, the first heat exchanger 7 is interposed in the exhaust pipe 6 connecting the indoor return air port (RA) and the outdoor exhaust port (EA), and the branch path 8a is located upstream of the branch path 8c. Second
A heat exchanger 14 is interposed. Further, a first air supply line 4 connecting the outside air inlet (OA) and the indoor air supply port (SA).
The second B heat exchanger 1 upstream of the first air supply fan 3
5 are interposed. The above-mentioned branch passage 8b is connected to the second B heat exchanger 15 , and the indoor side return air port (R
Part of the return air from A) passes through the second B heat exchanger 15 and is supplied again into the air-conditioned space via the first supply pipe 4 , so that a predetermined amount of air can always be ensured. It is configured to be able to. In this specification, the second
A heat exchanger 14 and second B heat exchanger 15 are connected to second heat exchanger
Will be referred to collectively.

Further, a fourth heat exchanger 16 and a compressor 17 are further provided in the housing 2 of the heat source unit 1, and the fourth heat exchanger 16 , the compressor 17, and the second heat exchanger A are provided.
Exchanger 14 and the second B heat exchanger 15 are connected to a refrigerant line 18a,
18b constitutes a refrigerant circulation path, for example, by opening and closing each valve means as shown in connection with FIG. 3, the second A heat exchanger 14 or the second B heat exchanger 1
By selectively connecting the fourth heat exchanger 16 to the fifth heat exchanger 5 , it is possible to configure a heat pump circuit optimal for various operation modes described later.

Further, the fourth heat exchanger 16 is a first pump
The first heat exchanger 7 is connected to the first heat exchanger 7 via the first water circulation pipes 20a and 20b in which the means 19 is interposed, and the fourth heat exchanger
In 16 , heat recovered from the refrigerant circulating in the heat pump circuit is exchanged with water circulating in the first water circulation pipes 20 a, 20 b, and the circulating water is converted into, for example, a small cooling water.
This is a gas-liquid contact type heat exchanger equipped with a tower-type evaporative condenser.
By spraying water on the filler of the first heat exchanger 7
As a result, gas-liquid direct contact is generated, and heat can be exhausted into the indoor exhaust flow flowing through the exhaust pipe 6. The first
The heat exchanger 7 is not limited to the sprinkling type, but
Wet the cooling water on a labyrinth or endless belt
It is also possible to use a rotating type
You.

A heat storage tank 21 is provided in the housing 2 of the heat source unit 1, and stores hot water heat or ice heat in the heat storage tank 21 according to the operation mode by using nighttime electric power as described later. It is possible to do. According to the present invention, in order to obtain heat from the hot water or ice stored in the heat storage tank 21 in this manner, the fourth heat exchanger 22 is provided with the second water circulation in which the second pump means 23 is interposed. Pipe 24
a and 24b are connected to the heat storage tank 21. This second
The fourth heat exchanger 22 is provided in the first air supply line 4 connecting the outside air supply port (OA) and the indoor air supply port (SA) .
B is arranged in series on the downstream side of the heat exchanger 15, and the hot or cold heat obtained from the heat storage tank 21 is supplied to the outside air inlet (O
It is configured to exchange heat with the outside air and return air (RA) taken in from A) and supply air to the air-conditioned space from the indoor air supply port (SA).

The heat storage tank 21 has a heater 25 and a fifth heat
An exchanger 26 is provided internally. Therefore the hot-water heat storage mode described later by heat storage and hot water storage tank by driving the heater 25, the fourth heat exchanger 22 when heat is required
It is possible to obtain the heat in the tank. Also the fifth
The heat exchanger 26 receives the fourth heat through the refrigerant pipes 27a and 27b.
Since it is in communication with the exchanger 16 , in the ice heat storage mode described below, ice is stored in the tank by the fifth heat exchanger 26, and when cold heat is required, heat in the tank is transferred by the fourth heat exchanger 22. It is possible to get.

FIG. 2 shows an embodiment of a heat medium circulation path applicable to the present invention. As shown in the drawing, the heat medium circulation path is a second A and second B heat exchanger that exchanges heat between the refrigerant and air to the compressor 17 and the accumulator 50 via a two-way valve and an expansion valve, respectively . 14 , 15,,
A fifth heat exchanger 26 installed in the heat storage tank 21 for exchanging heat between the refrigerant and the water and a fourth heat exchanger 16 exchanging heat between the refrigerant and the cooling water are connected. . With this configuration, by appropriately opening and closing the two-way valve, each heat exchanger can function as a condenser or an evaporator, and a heat pump circuit corresponding to each mode described below can be configured. In the figure, a solid line indicates a high-pressure tube, and a dotted line indicates a low-pressure tube.

The heat source unit 1 applicable to the air heat source type air conditioning system according to the present invention is configured as described above, and the heat source unit 1 can be installed at an arbitrary position on the interior side of the air conditioning space at the time of construction. At this time, since the heat storage tank 21 and the refrigerant circuit are integrally housed in the housing 2 of the heat source unit 1, it is not necessary to install heat transfer equipment such as refrigerant pipes and water pipes on site. Thus, the construction can be omitted and simplified, and the installation space can be saved.

In actually installing the heat source unit, an air-conditioning space such as an office building is divided into one or more air-conditioning units having a predetermined volume to form a module, and a heat source unit is installed for each air-conditioning unit. This makes it possible to construct a completely individual decentralized air conditioning system. The air-conditioning unit can be set to an arbitrary volume. For example, in an office building or the like, it is possible to use a space defined by a column interval. In a recent building, for example, 7 × 14 m is standardized. Therefore, as an air conditioning unit applied to this, about 1 m
It can be set to 00m ^2. Therefore, an air conditioning system for the entire air conditioning space such as a building can be constructed by repeating this air conditioning unit.

FIG. 4 shows the arrangement of the heat source unit 1 and the plurality of blower units 30 installed in each air conditioning unit. The heat source unit 1 and each blower unit supply the cool air and / or warm air to each blower unit by first and second blower ducts 31a and 31b corresponding to the first and second supply pipes 4 and 10 of the heat source unit, respectively. 30, and the cool air and / or the warm air can be selected or mixed in each blow unit 30, and can be supplied as an air of an optimal amount or temperature from the air outlet 32a to each individual air conditioning zone. Each of the air-conditioning zones is provided with a sensor 33a for detecting a temperature and humidity environment in the zone.
And / or by sending it to the heat source unit 1, it is possible to operate the air heat source type air conditioning system configured according to the present invention in an optimum mode as described later.

Blowing unit 3 installed in each air conditioning zone
0 is , for example, hot air and / or cold as shown in FIG.
Wind switching unit 31 and variable air volume unit (VAV: Variab)
leAir Volume). The cool air and / or warm air supplied to each blower unit 30 via the first and second air blower lines 31a and 31b respectively corresponding to the first and second air feeder lines 4 and 10 of the heat source unit 1 The air is introduced into the switching unit 31 through the inlets 33 and 34, and the switching between the hot air and the cold air can be selectively performed by opening and closing the switches 35 and 36 in the duct. Then, the selected air is adjusted in the variable air volume section by changing the air volume of the air supplied from the throttle port by the movement of the core 37, thereby adjusting the air blown from the air port 38 to the air conditioning zone, and controlling the indoor temperature. It can be adjusted to the optimal value. Alternatively, it is possible to adjust the mixing amount of the hot air and / or the cool air by adjusting the openings of the switches 35 and 36 in the duct. In this case, the unit does not require a variable air volume unit.

Next, various operation modes of the heat source unit of the air heat source type air conditioning system according to the present invention will be described in detail with reference to FIG. 1 and FIG.

[0047] 1. Heat storage operation The heat source unit 1 of the present invention can operate the compressor 17 or the heater 25 at night when the electricity rate is low, and can store ice or hot water in the heat storage tank 21.

(1) Cold water or ice heat storage mode At the time of cold water or ice heat storage, the fifth heat exchanger 26 , which is a refrigerant-water heat exchanger installed in the heat storage tank 21, converts water into cold water or freezes water to form a heat storage tank. Store in 21. Fifth
The exhaust heat exchanged by the heat exchanger 26 is sent by the compressor 17 to the fourth heat exchanger 16 which is a refrigerant-water heat exchanger via the refrigerant paths 18a and 18b, and further the water circulation path 2
0a, first heat exchange is an air heat exchanger water through 20b
It is sent to the heat exchanger 7 where it can be discarded by latent heat exchange by direct gas-liquid contact in the indoor exhaust stream taken in from the indoor air supply port (RA).

(2) Hot Water Heat Storage Mode When hot water heat storage is performed by the heat source unit 1, the heater 25 installed in the heat storage tank 21 is operated at night when the electricity rate is low, and water in the heat storage tank 21 is discharged. It is possible to warm up to a predetermined temperature and store heat as warm water. Or 2A heat exchange
It is also possible to constitute a heat pump by the heat exchanger 14 , the fifth heat exchanger 26 and the compressor 17, and drive the fifth heat exchanger 26 as a condenser to store hot water in the heat storage tank 21.

[0050] 2. Air-conditioning operation mode The heat source unit 1 according to the present invention can be driven in various operation modes as listed in FIG. 5 according to the cooling load and the heat storage state. Hereinafter, each operation mode will be sequentially described.

(1) a mode (cooling large load mode) When cold heat is stored in the heat storage tank 21 as ice or cold water, and the air conditioning load required in each air conditioning zone is a cooling large load, for example, during the high summer months In the daytime, the a-mode operation is performed according to the flowchart shown in FIG.

During the a-mode operation, the first and second
The first air supply line 4 and the first air supply line 4 are opened by closing the first and second air supply lines 10 and 12 and closing the second air supply line 10 and opening the third damper 13 to drive the first air supply fan 3 and the exhaust air fan 5.
The exhaust line 6 passing through the first heat exchanger 7 is activated.
Also, the second B heat exchange driven as the compressor 17 and the evaporator
A refrigerant circuit is constituted by the heat exchanger 15 and the fourth heat exchanger 16 ,
The cold heat is exchanged with the airflow in the first air supply line 4 from the second B heat exchanger 15 . The exhaust heat of the refrigerant circuit is supplied to a cooling water circuit constituted by a pump 19, a fourth heat exchanger 16 as a refrigerant-water heat exchanger, and a first heat exchanger 7 as a direct contact water-air heat exchanger. And the first heat exchange
The waste gas is discharged into the room exhaust air flowing through the exhaust pipe 6 from the vessel 7 . At the same time, the heat of the ice stored in the heat storage tank 21 is reduced by the pump 23 through the water circulation paths 24a and 24b.
Pumped by the fourth heat exchanger 22 and the first air supply line
The heat is exchanged into the indoor supply air flowing through the air supply 4 . Thus, during the a-mode operation, the second B and fourth heat exchange
Since the cold heat is exchanged with the indoor supply air flowing through the first air supply conduit 4 through the heat exchangers 15 and 22 , it is possible to cope with a large cooling load required in midsummer.

In the a-mode operation, the operation can be performed according to the flow shown in FIG. 6 by monitoring the temperature of the heat storage water by a sensor (not shown). That is, the temperature of the water taken out of the heat storage tank 21 is the first reference temperature , for example, 7 ° C.
If it is determined in step 10 that the temperature is below, in step 11, the operation of extracting the cold heat from the heat storage tank 21 by the fourth heat exchanger 22 is performed, and in step 12, the compressor is operated in accordance with the required cooling load. The cooling capacity of 17 is adjusted, and the shortage of the cooling capacity of the heat storage tank is compensated.

On the other hand, when it is determined in step 10 that the temperature of the water taken out of the heat storage tank 21 is equal to or higher than the first reference temperature , for example, 7 ° C., the temperature of the water taken out of the heat storage tank 21 is further condensed in step 13. It is determined whether the temperature is lower than the temperature that can be used as cooling water for the vessel, that is, the temperature is equal to or lower than the second reference temperature .
A fifth heat exchanger 26 operated as a condenser, the 2B heat exchanger
The pump 15 stops pumping the cold heat in the heat storage tank 21 and stops the pumping of the cold heat by the fourth heat exchanger 22 . Then, in step 12, the cooling capacity of the compressor 17 is adjusted according to the cooling load required, and the shortfall is compensated. The second reference temperature is set to a temperature at which circulating water can be used as cooling water for the condenser, and can be set, for example, in the range of 7 ° C to 35 ° C.

In step 13, when the temperature of the water taken out of the heat storage tank 21 further rises and becomes equal to or higher than the second reference temperature, and it becomes impossible to use it as cooling water for the condenser, it is difficult to extract cold heat from the heat storage tank 21. Therefore, in step 15, the use of the heat storage tank 21 is stopped. Then, in step 12, the cooling capacity of the compressor 17 is adjusted according to the cooling load required, and the cooling operation is continued by discharging the exhaust heat from the first heat exchanger 7 into the exhaust air from the room. Is possible.

As described above, when the operation control of the air conditioning system is performed in the a mode, the pumping of the cold stored in the heat storage tank 21 by the fourth heat exchanger 22 or the second B heat exchanger 15 is preferentially performed. By performing the cooling and controlling the cooling capacity of the portion where the cooling heat is insufficient, it is possible to cope with the cooling load required from the air-conditioned space.

(2) b mode (cooling small load mode) In the case where cold heat is stored in the heat storage tank 21 as ice or cold water, and the air conditioning load required in each air conditioning zone is small, the heat storage tank 21 is operated during operation. The b-mode air conditioning operation without heat recovery is performed.

During the b-mode operation, the first and second
Second supply duct 10 is blocked path 11, 12 is closed, so opening the third damper 13, the first air supply fan 3
By driving the exhaust fan 5 and the exhaust fan 5, the exhaust line 6 passing through the first air supply line 4 and the first heat exchanger 7 is made effective. A refrigerant circuit including a compressor 17, a third refrigerant-air heat exchanger 15, and a fourth refrigerant-water heat exchanger 16 ,
And a pump 19, a fourth refrigerant-water heat exchanger 16 and
The heat exhaust circuit constituted by the first water-air heat exchanger 7 is stopped, and the supply of cold heat to the air conditioning zone is performed exclusively by pumping cold heat from the heat storage tank 21. That is, the cold heat stored in the heat storage tank 21 in an ice-phase state is pumped up by the fourth heat exchanger 22 via the water circulation paths 24 a and 24 b by the pump 23, and into the indoor air supply air flowing through the first air supply pipe 4. Heat is exchanged, and cold heat is supplied to each air conditioning zone.

As described above, during the b-mode operation, the cooling capacity is controlled by adjusting the pumping of the cold stored in the heat storage tank. However, when heat is not stored in the heat storage tank, If all of the heat stored in the inside has been consumed, the air conditioning operation can be changed to the a mode, the refrigerant circuit and the exhaust heat circuit can be driven, and the supply of cold heat by the second B heat exchanger 15 can be started. It is.

(3) c1 mode (simultaneous cooling and heating load mode) Cold heat is stored in the heat storage tank 21 as ice or cold water, and is basically in the cooling mode, but the cooling load and the heating load are simultaneously applied from the air conditioning zone. If required and the cooling load is larger than the heating load, the c1 mode operation is performed. Note that heat recovery is not performed in the heat storage tank 21 during the c1 mode operation.

In the c1 mode operation, the first damper 11 is closed, and the second and third dampers 12, 13 are opened.
By driving the first and second air supply fans 3, 9 and the exhaust fan 5, the first and second air supply lines 4, 10
And the exhaust line 6 passing through the first heat exchanger 7 is activated. Also by driving the compressor 17, evaporative first 2B heat exchanger is operated as 15 second to be driven as a condenser
Together with the refrigerant circuit is constituted by A heat exchanger 14 and the fourth heat exchanger 16, by driving the pump 19, the first heat
The heat exchanger or heat recovery circuit is constituted by the exchanger 7 and the fourth heat exchanger 16 .

With this configuration, the cold heat stored in the heat storage tank 21 as an ice phase is pumped up by the fourth heat exchanger 22 , and is used as the cooling air as the first air supply line 4 and the first blower tube.
It is possible to supply the air to the blower unit 30 via the path 31a . At the same time, the compressor 17, the second A heat exchanger 1
4. A heat pump is constituted by the second B heat exchanger 15 ,
The first supply from the second B heat exchanger 15 functioning as an evaporator
It is possible to supply cold heat to the air duct 4 and to supply warm heat to the second air supply duct 10 from the second heat exchangers 14 and 15 functioning as condensers. Since the cooling load is larger than the heating load during the c1 mode operation, excess heat generated in the heat pump circuit is sent to the first heat exchanger 7 via the cooling water circulation circuit, and is exhausted during exhaust from the room. Thus, during the c1 mode operation, the first supply
It is possible to send cold air from the air duct 4 and hot air from the second air duct 10 to the blowing unit 30.
The cooling air and the heating air supplied to 0 are selected or mixed in the blowing unit 30, and the air having the optimum amount or temperature is blown to the air conditioning load of each air conditioning zone.

As described above, during the c1 mode operation, the first
The supply of the cold heat to the air supply line 4 is performed by pumping the cold heat stored in the heat storage tank 21 by the fourth heat exchanger 22 , and the supply of the warm heat to the second air supply line 10 is performed by the second A heat exchange.
This is done by driving the vessel 14 as a condenser.
By the way, in the control of the cooling capacity by the first supply pipe 4 , even in the c1 mode operation, the adjustment of the pumping capacity of the cold heat from the heat storage tank 21 is preferentially performed.
1 is not stored in the heat storage tank 21 or the heat storage tank 21
If all of the heat stored in the heat exchanger is consumed, the output of the compressor 17 can be adjusted and the supply of the cold heat by the second B heat exchanger 15 can be enhanced.

(4) c2 Mode (Simultaneous Cooling / Heating Load Mode) Cold heat is stored in the heat storage tank 21 as ice or cold water, which is basically in the heating mode. At the same time, if the heating load is greater than the cooling load and there is no possibility that the cooling load is greater than the heating load, the c2 mode operation is performed. Note that heat recovery to the heat storage tank 21 is not performed during the c2 mode operation.

During the c2 mode operation, the first and second
The dampers 11 and 12 are opened, the third damper 13 is closed, and the first
By driving the second and third air supply fans 3, 9 and the exhaust fan 5, the first and second air supply lines 4, 10 and the exhaust line 6 are made effective. However exhaust air, the first
Passing through the second A heat exchanger 14 without passing through the heat exchanger 7 ,
A part of the exhaust air is sent to the exhaust line 6 via the line 8c, and a part of the exhaust air is
The air path is configured to be sent to zero . Also by the compressor 17, the first 2B heat exchanger 15 is driven as a condenser, the first 2A heat exchanger 14 constitute a heat pump circuit by driving as an evaporator, the first supply pipe than the 2B heat exchanger 15 Supply heat to Road 4 and heat exchange 2A
It is possible to supply cold heat to the second air supply line 10 from the exchanger 14 . During the c2 mode operation, the heating load is larger than the cooling load, and the relationship does not reverse. Therefore, the exhaust heat or heat recovery circuit constituted by the first heat exchanger 7 and the fourth heat exchanger 16 is stopped. Is done. In this way, at the time c2 mode operation, the from the first supply duct 4 1
With heat is supplied to the blower unit 30 through the blower duct 31a, from the second supply duct 10 and the second blower duct 3
Cold air is supplied to the blower unit 30 via 1b , the cool air and the warm air are selected or mixed in the blower unit 30, and air having an optimum amount or temperature is blown to the air conditioning load of each air conditioning zone.

As described above, during the c2 mode operation, it is assumed that the heating load is larger than the cooling load, and that the ratio is not reversed, so that the first heat exchanger 7 and the fourth heat exchanger 16 Without driving the cooling water circuit constituted by the above, it is possible to drive the second A heat exchanger 14 as an evaporator to obtain cold heat and to drive the second B heat exchanger 15 as a condenser to obtain warm heat. . Therefore, the control of the cooling and heating capacity is performed only by adjusting the operating capacity of the compressor 17.

(5) c3 Mode (Simultaneous Cooling / Heating Load Mode) Cooling heat is stored in the heat storage tank 21 as ice, which is basically a cooling mode. However, a cooling load and a heating load are simultaneously requested from the air conditioning zone. When the heating load is larger than the cooling load, the c2 mode operation is performed. However, in the c3 mode operation, since the cooling mode is basically used, the cooling load may be larger than the heating load during the operation, and unlike the c1 mode operation, heat is recovered to the heat storage tank 21 during the operation. Is performed.

In the c3 mode operation, the first damper 11 is closed, and the second and third dampers 12 , 13 are opened.
By driving the first and second air supply fans 3, 9 and the exhaust fan 5, the first and second air supply lines 4, 10
And the exhaust line 6 passing through the first heat exchanger 7 is activated. In addition, the compressor 17 drives the second A heat exchanger 14 as a condenser to obtain heat , and the second B heat exchanger
The refrigerant circuit is configured to drive the fifteenth and fifth heat exchangers 26 as an evaporator to obtain cold heat, whereby the first air supply is performed.
In addition to supplying cooling air to the pipe 4 , the second air supply pipe
10 is supplied with air for heating. In this way, the first and
And first and second air supply lines 3 from the second air supply lines 4 and 10
The hot air and the cold air sent to the blower unit 30 via 1a and 31b are optimally selected or mixed in the blower unit 30 so that a desired amount or temperature of air can be supplied to each air conditioning zone. Become.

The heat storage tank 2 together with the second B heat exchanger 15
Since the fifth heat exchanger 26 installed in the 1 be driven as an evaporator, if the heating load is large, using the heat storage tank 21 as a heat source, the heat storage tank 2 by the fifth heat exchanger 26
It is possible to store cold heat as cold water or ice in the heat storage tank 21 by drawing warm heat from 1. Thus, by driving the fifth heat exchanger 26 , c3
During the mode operation, heat can be recovered in the heat storage tank 21.

During the operation in the c3 mode, the compressor 17, the second A heat exchanger 14 , the second B heat exchanger 15,
Since the fifth heat exchanger 26 constitutes a heat pump circuit, its operation capacity control is performed by exclusively adjusting the output of the compressor 17 in accordance with the required cooling / heating load.

(6) d1 Mode (Heating Small Load Mode) When cold heat is stored in the heat storage tank 21 as ice or cold water, and a relatively small heating load is required from the air conditioning zone, the heat storage tank 21 D1 mode operation in which heat recovery is not performed is performed.

During the d1 mode operation, the first damper 11 is opened, the second and third dampers 12 , 13 are closed, and the
By driving the first air supply fan 3 and the exhaust fan 5, the exhaust gas line 6 passing through the first air supply line 4 and the second A heat exchanger 14 is made effective. Also, by the compressor 17,
The first 2B heat exchanger 15 is driven as a condenser, the 2A heat exchange
A heat pump circuit is formed by driving the heat exchanger 14 as an evaporator, and heat is recovered by the second A heat exchanger 14 from the indoor exhaust air taken in from the indoor ventilation port (RA).
Heat can be supplied to the first air supply line 4 via the second B heat exchanger 15 . During d1 mode operation,
The exhaust heat or cooling water circuit constituted by the first heat exchanger 7 and the fourth heat exchanger 16 is stopped. In this manner, during the d1 mode operation, the first air supply from the first air supply line 4 is performed .
By supplying the heat to the blower unit 30 via the air duct 31a , it is possible to cope with a relatively small heating load required in each air conditioning zone.

As described above, the d1 mode is the second A heat exchange
And heat recovery from the indoor-side exhaust by vessel 14, the 2B heat exchanger
It is possible to supply heat to the first air supply line 4 from the heater 15 . Therefore, the control of the heating capacity of the air conditioning system is performed exclusively by adjusting the operating capacity of the compressor 17.

(7) d2 mode (heating small load mode) When cold heat is stored as ice in the heat storage tank 21 and a relatively small heating load is required from the air conditioning zone, the heat storage operation is designated in advance. By doing so, the d2 mode operation for performing heat recovery to the heat storage tank 21 during the air conditioning operation is performed.

During the d2 mode operation, the first and second
The dampers 11 and 12 are closed, the third damper 13 is opened, and the
By driving the first air supply fan 3 and the exhaust fan 5, the first air supply line 4 and the exhaust line 6 passing through the first heat exchanger 7 are made effective. Also by the compressor 17, the second
By driving the B heat exchanger 15 as a condenser and driving the fifth heat exchanger 2614 installed in the heat storage tank 21 as a compressor to constitute a heat pump circuit, the heat storage tank 21 can be operated during the operation of the air conditioning system. Ice is stored in the first air supply pipe via the second B heat exchanger 15
It is possible to supply to road 4 . During the d2 mode operation, the pump 19 is stopped and the first heat exchanger 7 and the
The exhaust heat or cooling water circuit constituted by the four heat exchangers 16 is stopped, and the air is sucked from the indoor ventilation port (RA) and exhausted as it is from the outdoor air outlet (EA).

As described above, during the d2 mode operation, the heat recovered by the fifth heat exchanger 26 during ice storage in the heat storage tank 21 is transferred to the first air supply line via the second B heat exchanger 15.
4 , it is possible to cope with a relatively small heating load required in each temperature control zone. Therefore, control of the heating capacity of the air conditioning system is performed solely by controlling the operating capacity of the compressor 17.

(8) e1 Mode (Cooling Small Load Mode) In the case where hot water is stored in the heat storage tank 21 using nighttime electric power, but a relatively small cooling load is required from the air conditioning zone, The e1 mode operation is performed. However,
In this case, heat recovery to the heat storage tank 21 is not performed.

During the e1 mode operation, the first and second
The dampers 11 and 12 are closed, the third damper 13 is opened, and the
By driving the first air supply fan 3 and the exhaust fan 5, the first air supply line 4 and the exhaust line 6 passing through the first heat exchanger 7 are made effective. Also by the compressor 17, the second
The B heat exchanger 15 is driven as an evaporator, and a heat exhaust circuit is provided between the fourth heat exchanger 16 as a refrigerant-water heat exchanger and the first heat exchanger 7 as a direct contact water-air heat exchanger. To supply cold heat to the first air supply line 4 through the second B heat exchanger 15 and to transfer the exhaust heat thereof to the fourth heat exchanger 16.
Through the first heat exchanger 7 and can be discarded into the room exhaust air taken in from the room-side return air port (RA).

As described above, since a relatively small cooling load is required during the e1 mode operation, the second B heat exchanger
15 can be driven as an evaporator to supply cold heat to the first air supply line 4 . Therefore, the control of the cooling capacity of the air conditioning system is performed exclusively by adjusting the operating capacity of the compressor 17.

(9) e2 Mode (Cooling Small Load Mode) In the case where hot water is stored in the heat storage tank 21 using nighttime electric power, but a relatively small cooling load is required from the air conditioning zone, The e2 mode operation is performed by designating the heat storage operation in advance. In the e2 mode operation, heat can be recovered to the heat storage tank 21.

During the e2 mode operation, the first and second
The dampers 11 and 12 are closed, the third damper 13 is opened, and the
By driving the first air supply fan 3 and the exhaust fan 5, the first air supply line 4 and the exhaust line 6 passing through the first heat exchanger 7 are made effective. Also by the compressor 17, the second
Drives the B heat exchanger 15 as an evaporator, by configuring the refrigerant circuit for driving a compressor of a fifth heat exchanger 26 installed in the heat storage tank 21, a 2B to the first supply duct 4
Heat can be recovered by supplying cold heat via the heat exchanger 15 and exchanging the exhaust heat into the heat storage tank 21 via the fifth heat exchanger 26 . Since the pump 19 is stopped during the air-conditioning operation, the indoor exhaust air supplied from the indoor air return port (RA) is supplied to the first heat exchanger 7.
Through the outside exhaust port (E
A) The air is exhausted outside the room.

As described above, at the time of the e2 mode operation, since a relatively small cooling load is required from each air conditioning zone, the second B heat exchanger 15 is used to transfer the cooling heat to the first air supply line 4.
, It is possible to sufficiently cope with the cooling load. Further, since the heat storage tank 21 is used as a cold source of the cold supplied by the second B heat exchanger 15 , the fifth heat exchange
By exchanging heat with warm water by the heater 26 , heat can be stored during the air conditioning operation. Therefore, at the time of the e2 mode operation, the control of the cooling capacity of the air conditioning system is performed only by adjusting the operating capacity of the compressor 17.

(10) f1 Mode (Cooling and Heating Simultaneous Load Mode) Hot water is stored in the heat storage tank 21 using nighttime electric power, and is basically in the heating mode. Are required at the same time, and if the heating load is larger than the cooling load, the f1 mode operation is performed. During the f1 mode operation, heat is not recovered in the heat storage tank 21.

During the f1 mode operation, the first and second
By opening the dampers 11 and 12 and closing the third damper 13 and driving the first and second air supply fans 3 and 9 and the exhaust fan 5, the first and second air supply lines 4,
The exhaust pipe 6 passing through the heat exchanger 10 and the second A heat exchanger 14 and the first damper 11 is enabled. A part of the circulating air sucked from the indoor return air inlet (RA) and passing through the second A heat exchanger 14 is passed through the second damper 12 to the second air supply line 1.
0 , and the other part is sent to the exhaust pipe 6 via the first damper 11 . Also by driving the compressor 17, the 2B heat exchanger 15 is operated as a condenser, the heat pump circuit is constituted by a 2A heat exchanger 14 which is driven as an evaporator, via the first 2B heat exchanger 15 Heat is supplied to the first air supply line 4 and, via the second A heat exchanger 14 ,
It is possible to supply cold heat to the second air supply line 10 .
At the same time, it is possible to drive the pump 23 to pump up the heat from the hot water stored in the heat storage tank 21 and supply the heat to the first supply line 4 via the fourth heat exchanger 22 . Thus, from the first air supply line 4 to the first air supply line
Hot air supplied to the blower unit 30 via the air supply unit 31a ;
Selecting or mixing the cool air supplied from the second air supply line 10 to the air blowing unit 30 via the second air supply line 31b ,
Air of the optimal amount or temperature is blown to the air conditioning load of each air conditioning zone.

As described above, during the f1 mode operation, the first
The supply of heat to the supply duct 4, pumping hot water stored in the heat storage tank 21 by the fourth heat exchanger 22, the
This is performed by supplying the heat recovered from the indoor exhaust air by a heat pump circuit composed of the 2B heat exchanger 15 and the second A heat exchanger 14 . Second air supply line 1
The supply of the cold heat to 0 is performed by supplying the cold heat generated by the heat pump circuit through the second A heat exchanger 14 .

Thus, during the f1 mode operation, the first
The supply of the heat to the supply pipe 4 is performed by first pumping the heat stored in the heat storage tank 21. However, when the heat is not stored in the heat storage tank 21, or the heat storage in the heat storage tank 21 is completely consumed. When it has been consumed, it is performed by starting the supply of warm heat by the second B heat exchanger 15 by driving the compressor 17. Therefore, when the operation control of the air conditioning system is performed in the f1 mode, the priority is given to the adjustment of the amount of the heat pumped from the heat storage tank 21 by the fourth heat exchanger 22 .
The output of the compressor 17 is adjusted according to the heating load from the air-conditioned space, and the second B heat exchanger 15 supplies warm heat .

(11) f2 Mode (Cooling and Heating Simultaneous Load Mode) Hot water is stored in the heat storage tank 21 using nighttime electric power, and is basically in the cooling mode. Are required at the same time, and when the cooling load is larger than the heating load, and there is no possibility that the heating load is larger than the cooling load, the f2 mode operation is performed. Note that heat recovery to the heat storage tank 21 is not performed during the f2 mode operation.

In the f2 mode operation, the first damper 11 is closed, the second and third dampers 12 , 13 are opened, and the
By driving the first and second air supply fans 3, 9 and the exhaust fan 5, the exhaust line 6 passing through the first and second air supply lines 4, 10 and the first heat exchanger 7 is enabled. . The compressor 17 also the first 2B heat exchanger 15 is driven as an evaporator, the heat pump circuit composed by driving the first 2A heat exchanger 14 as a condenser, the first air supply
It is possible to supply cold heat to the pipe 4 via the second B heat exchanger 15 and to supply hot heat to the second air supply pipe 10 via the second A heat exchanger 14 . Also, during the f2 mode operation, the cooling water circuit constituted by the fourth heat exchanger 16 and the first heat exchanger 7 is also enabled, so that the cooling water circuit is consumed by the second A heat exchanger 14 , which is a condenser of the heat pump circuit. The unsuccessful heat is exhausted into the exhaust air from the room through the cooling water circuit.

[0089] During f2 mode operation as described above, larger than the heating load is toward the cooling load, and since the rate of which is assumed not to reverse, the 2A heat exchanger 1
4 together to obtain a driving and heat as a condenser, and heat the 2B
The heat can be obtained by driving the exchanger 15 as an evaporator. Therefore, the control of the cooling and heating capacity is performed only by adjusting the operating capacity of the compressor 17.

(12) f3 Mode (Cooling and Heating Simultaneous Load Mode) Hot water is stored in the heat storage tank 21 using nighttime electric power, and is basically in the heating mode. Are required at the same time, and when the cooling load is larger than the heating load, the f3 mode operation is performed. However, during the f3 mode operation, since the heating mode is basically used, the heating load may be larger than the cooling load during the operation. In addition, unlike the f1 mode operation, the heat storage operation is designated in advance. During operation, heat is recovered to the heat storage tank 21.

In the f3 mode operation, the first damper 11 is closed, and the second and third dampers 12 , 13 are opened.
By driving the first and second air supply fans 3, 9 and the exhaust fan 5, the first and second air supply lines 4, 10
And the exhaust line 6 passing through the first heat exchanger 7 is activated. The compressor 17 drives the second A heat exchanger 14 as an evaporator, and drives the second B heat exchanger 15 and the fifth heat exchanger 26 as a condenser to form a heat pump circuit. 1st air supply line
4 is supplied with heating air via the second B heat exchanger 15, and is supplied with cooling air to the second air supply line 10 via the second A heat exchanger 14 . In this way the first and
First and second air supply lines 31 from the second air supply lines 4 and 10
The hot air and the cool air sent to the blower unit 30 via the a and 31b are optimally selected or mixed in the blower unit 30 so that a desired amount or temperature of air can be supplied to each air conditioning zone. Become.

In the f3 mode operation, the fifth heat exchanger
26 is driven as a condenser, so that the second A heat exchanger 1
The difference between the cold heat supplied to the fourth heat exchanger 4 and the hot heat supplied to the second B heat exchanger 15 is absorbed by the fifth heat exchanger 26 , and heat can be recovered by producing hot water in the heat storage tank 21. It is.

As described above, in the f3 mode operation, the second B
Since the heat exchanger 15 is driven as a condenser to obtain warm heat and the second A heat exchanger 14 is driven as an evaporator to obtain cool heat , the control of the heating capacity is exclusively performed by the operation of the compressor 17 of the heat pump circuit. This is done by adjusting the abilities.

(13) g Mode (Heating Small Load Mode) When hot water is stored in the heat storage tank 21 using nighttime electric power and the heating load required in each air conditioning zone is small, the g mode operation is performed. Is performed. However, during this g-mode operation, heat is not recovered in the heat storage tank 21.

In the g mode operation, the first and second
The second air supply pipe 10 is blocked path 11, 12 is closed, so opening the third damper 13, the first air supply fan 3
By driving the exhaust fan 5 and the exhaust fan 5, the exhaust line 6 passing through the first air supply line 4 and the first heat exchanger 7 is made effective. A refrigerant circuit including a compressor 17, a third refrigerant-air heat exchanger 15, and a fourth refrigerant-water heat exchanger 16 ,
And a pump 19, a fourth refrigerant-water heat exchanger 16 and
The heat exhaust circuit composed of the first water-air heat exchanger 7 is stopped, and the supply of heat to the air conditioning zone is performed exclusively by pumping the heat from the heat storage tank 21. That is, the heat storage tank 21
The heat stored as hot water is pumped up by the fifth heat exchanger 15 via the water circulation paths 24a and 24b by the pump 23, and is exchanged with the indoor supply air flowing through the first air supply pipe 4. Heat is supplied to the air conditioning zone.

As described above, during the g-mode operation, the heating capacity is controlled by adjusting the heat storage amount or the heat storage temperature of the heat storage tank 21, but when the heat storage in the heat storage tank 21 is not performed, or If all the heat stored in the heat storage tank 21 has been consumed, the air conditioning operation is changed to the h mode, the heat pump circuit is driven, and the second B heat exchanger 15
It is possible to start the supply of warm heat by means of.

(14) h Mode (Heating Large Load Mode) When hot water is stored in the heat storage tank 21 using nighttime electric power and the air conditioning load required in each air conditioning zone is a heating large load. The h-mode operation is performed according to the flowchart shown in FIG.

In the h mode operation, the second and third dams are used.
Second supply duct 10 is blocked path 12, 13 is closed, the first damper 11 is opened, by driving the exhaust fan 5 and the first air supply fan 3, the first supply duct 4 and
The exhaust line 6 passing through the second A heat exchanger 14 is enabled. Also, the compressor 17 and the second B heat driven as a condenser
Exchanger 15 , second A heat exchanger 1 driven as an evaporator
4 constitutes a refrigerant circuit, and heat recovered by the second A heat exchanger 14 from indoor exhaust air taken in from the indoor return air opening (RA) is supplied to the first air supply pipe by the second B heat exchanger 15 .
The heat is exchanged with the airflow in the passage 4 . At the same time, heat storage tank 2
1, the heat is supplied from the pump 23 to the water circulation paths 24a, 24b.
It is pumped by the fourth heat exchanger 22 via a first
The heat is exchanged into the indoor supply air flowing through the supply line 4 .
In this way, during h-mode operation, the 2B and
Since heat is exchanged with the indoor supply air flowing through the first air supply line 4 via the four heat exchangers 15 and 22 , it is possible to cope with a large heating load.

In the h-mode operation, the operation can be performed according to the flow shown in FIG. 7 by monitoring the temperature of the heat storage water by a sensor (not shown). That is, when it is determined in step 20 that the temperature of the water taken out of the heat storage tank 21 is equal to or higher than the first reference temperature , for example, 35 ° C. or higher, the operation of extracting heat from the heat storage tank 21 is performed in step 21, and In step 22, the heating operation capacity of the compressor 17 is adjusted according to the request of the heating load, and the shortage of the heat supply from the heat storage tank 21 is supplemented.

On the other hand, in step 20, the temperature of the water taken out of the heat storage tank 21 is lower than the first reference temperature , for example, 3
If it is determined that the temperature is 5 ° C. or less, the temperature of the water taken out of the heat storage tank 21 is further increased in step 23.
Temperature at which heat can be recovered by the fifth heat exchanger 26 in the inside,
That second reference temperature or more, or it is determined if an example 7 ° C. or higher, when taking out the water temperature is a second reference temperature or more, the in thermal storage tank 21 in step 24
(5) The heat exchanger 26 is operated as an evaporator to pump up the heat in the heat storage tank 21, and the first air is supplied through the second B heat exchanger 15.
While exchanging heat with the indoor supply air in the pipe 4 ,
The pump 23 is stopped, and the pumping of warm heat by the fourth heat exchanger 22 is stopped. Then, the heating capacity of the compressor 17 is adjusted in accordance with the heating load required in step 22,
The required shortage of heating load is compensated.

In step 24, if the temperature of the water taken out of the heat storage tank 21 further decreases and becomes lower than or equal to the second reference temperature , the fifth heat exchanger 26 as an evaporator also pumps out the heat from the heat storage tank 21. In step 15, the use of the heat storage tank 21 is stopped. In step 22, to adjust the heating capacity of the compressor 17 according to the required heating load, the more exhaust from the room
The heat is recovered by the 2A heat exchanger 14 and the second B heat exchanger 1
5, it is possible to supply heat to the first air supply line 4 .

As described above, when the operation control of the air conditioning system is performed in the h mode, the pumping of the heat stored in the heat storage tank 21 by the fourth heat exchanger 22 and the second B heat exchanger 15 is preferentially performed. If the heating is insufficient, the compressor 17 is driven to control the heating capacity, so that it is possible to cope with the heating load required from the air-conditioned space.

As described above, the heat source unit 1 of the air heat source type air conditioning system according to the present invention can be operated in various modes according to the air conditioning load required in each air conditioning zone.

Next, a control method of the air heat source type air conditioning system according to the present invention will be described. The control system of the air heat source type air conditioning system according to the present invention includes the operation mode selection of the heat source unit 1, the operation mode selection of the blower unit 30, and the variable air volume control.

First, an outline of a control flow of the present air conditioning system will be described with reference to FIGS. First, in step 30, the air conditioning control starts by controlling the air temperature at the outlet of the heat source unit to be constant and blowing air to each individual air conditioning zone via each blowing unit. Next, in step 31, the operation mode (cooling / heating) is determined from the room temperature detection value of the room temperature sensor 33 installed for each individual air conditioning zone, and the number of operation modes required in each individual air conditioning zone is determined by cooling and heating. In step 32, the air-conditioning operation mode of the heat source unit 1 is determined based on the condition detected in step 31 and the heat storage state of the heat storage tank 21. Next, in step 33, the operation mode (cooling / heating) is determined from the operation mode information of the heat source unit 1 and the room temperature detected value detected for each individual air conditioning zone, and the switching control of the cooling / heating of each blowing unit is performed. Then, in step 34, the air flow control of each blower unit is performed for each air conditioning zone, and a series of controls is completed.
The result of the control is fed back to step 31, and the feedback control of the heat source unit 1 and the blower unit 30 is performed so that the room temperature of each individual air conditioning zone is maintained at the optimum value.

FIG. 9 and FIG. 10 show a flow for selecting the operation mode of the heat source unit 1 performed in step 32. Proceeding from step 31 to step 40, it is determined whether or not ice is stored in the heat storage tank 21. If ice storage is being performed, step 41
It is determined whether the air conditioning load required in each air conditioning zone is only cooling or heating is also required. If only the cooling load is requested, the process proceeds to step 42, where the operation mode of the heat source unit 1 is set to the b mode, and the fourth heat exchanger 22 transfers the cold heat from the heat storage tank 21 to the first air supply line 4 . Heat is exchanged with the supply air. If the supply air temperature required by each air conditioning zone is satisfied in step 43 by the b-mode operation of the heat source unit 1, the b-mode operation is continued. On the other hand, if it is determined in step 43 that the supply air temperature is not within the predetermined range, it is determined in step 44 whether the supply air temperature is higher than the predetermined temperature. , The b-mode operation is continued. However, if it is determined in step 44 that the supply air temperature is higher than the predetermined temperature, the mode a is selected in step 45, and the supply of cold heat by the second B heat exchanger 15 is also used.

Returning to step 41 again, step 41
If it is determined that the operation other than the cooling operation is necessary in each air conditioning zone, it is determined in step 46 whether or not only the heating operation is required. If only the heating operation is requested in step 46, it is further determined in step 47 whether or not heat recovery by ice storage is performed in the heat storage tank 21 during operation of the air conditioning system. D at 48
If the first mode is selected and ice storage is performed, step 49 is performed.
, The d2 mode is selected.

If it is determined in step 46 that not only heating but also cooling is necessary, in step 50, the heat storage tank 21 is operated during operation of the air conditioning system.
It is determined whether or not heat recovery by ice storage is to be performed. If ice storage is to be performed, the c3 mode is selected in step 51, and it is determined which of the cooling load and the heating load is larger. While the heat is being recovered, the air conditioning operation in which the heating load is higher than the cooling load is performed. On the other hand, if it is determined in step 50 that the heat storage by the ice storage is not performed in the heat storage tank 21 during the air conditioning operation, the cooling load and the heating load are further compared in step 52,
When the cooling load is larger than the heating load, the c1 mode is selected. When the heating load is larger than the cooling load, c1 is selected.
Two modes are selected.

As shown in FIG. 9, when it is determined in step 40 that ice is to be stored in the heat storage tank 21, the operation mode of the heat source unit 1 is selected according to the above sequence.

On the other hand, if it is determined in step 40 that ice is not stored in the heat storage tank 21, hot water is stored in the heat storage tank 21 and the heat source unit 1 is stored in accordance with the sequence shown in FIG. The operation mode is selected.

First, at step 55, it is determined whether the air conditioning load required in each air conditioning zone is only heating or cooling is also required. If only the heating load is requested, the process proceeds to step 56, where the operation mode of the heat source unit 1 is set to the g mode, and the fourth heat exchange
The heat from the heat storage tank 21 is transferred to the first air supply line 4 by the heat exchanger 22.
Is exchanged with the supply air. Such a heat source unit 1
If the supply air temperature required by each air-conditioning zone is satisfied in step 57 by the g-mode operation described above, the g-mode operation is continued. On the other hand, if it is determined in step 57 that the supply air temperature is not within the predetermined range, it is determined in step 58 whether the supply air temperature is lower than the predetermined temperature. Is
The g mode operation is continued. However, if it is determined in step 58 that the supply air temperature is lower than the predetermined temperature, the h mode is selected in step 59 and the second mode is selected .
The supply of warm heat by the heat exchanger 15 is also used.

Returning to step 55 again, step 55
If it is determined that the operation other than heating is necessary in each air conditioning zone in step 60, it is determined in step 60 whether only the cooling operation is required. If only the cooling operation is required in step 60, it is further determined in step 61 whether or not heat recovery by hot water storage is performed in the heat storage tank 21 during operation of the air conditioning system. At 62, the e1 mode is selected. When ice storage is performed, the e2 mode is selected at step 63.

If it is determined in step 60 that not only cooling but also heating is necessary, then in step 64, the heat storage tank 21 is operated during operation of the air conditioning system.
It is determined whether or not heat recovery by ice storage is to be performed. If ice recovery is to be performed, the f3 mode is selected in step 51, and the air conditioning operation in which the cooling load is stronger than the heating load while performing heat recovery in the heat storage tank 21 is performed. Is performed. On the other hand, if it is determined in step 66 that the heat storage tank 21 is not to recover heat by ice storage during the air-conditioning operation, the cooling load and the heating load are further compared in step 66, and the heating load is changed to the cooling load. If the cooling load is larger than the heating load, the f1 mode is selected.
Mode is selected.

As described above, if it is determined in step 40 that ice is to be stored in the heat storage tank 21, ice is stored in the heat storage tank 21 and the heat source unit 1 is stored in accordance with the sequence shown in FIG. When the operation mode is selected, and it is determined in step 40 that ice storage is not performed in the heat storage tank 21, hot water heat storage is performed in the heat storage tank 21 and the heat source is stored in accordance with the sequence shown in FIG. The operation mode of the unit 1 is selected.

Next, a flow of selecting the operation mode of the blower unit 30 performed in step 33 of FIG. 8 will be described with reference to FIG. As already described with reference to FIG. 3, the blower unit 30 includes the switching unit 31 and the variable air volume control unit 32, and includes the first air supply line 4 and
And a inlet 33 communicates (a line) and inlet 34 (b line) communicating with the second supply duct 10 and the second air feed conduit 31b to the first feed conduit 31a. Therefore,
When switching between hot air and cold air, step 70
It is determined whether the heat source unit 1 is operating in the cooling cycle or in the heating cycle. When the heat source unit 1 is operated in the cooling cycle, in step 71, it is possible to perform the cooling air mainly by flowing the cool air to the system a and the hot air to the system b. Heat source unit 1
If is operating in a heating cycle, step 7
In 2, it is possible to supply cool air by flowing warm air into the a system and flowing cool air through the b system.

Next, the flow of the variable air volume control shown in step 35 of FIG. 8 will be described with reference to FIG.
First, in step 80, selection or mixing of cold air and / or hot air is performed in the switching unit 31 of the blowing unit 30, and then in step 81, the blowing unit 3
Variable air volume control is performed in a variable air volume unit of zero. As a result of the variable air volume control, it is determined in step 82 whether or not the throttle opening in the variable air volume control unit 32 is fully open by an opening degree detector (not shown). It is determined whether or not the output is the maximum. If the output of the blower is not the maximum, the process returns to step 80 and step 81 again, and VAV control is performed by adjusting the output of the blower and the opening of the throttle opening. However, if the rotation speed output of the blower has reached the maximum value in step 83, it is difficult to control the blowing temperature by adjusting the rotation speed output of the blower. It is determined whether cool air or warm air is required in the air-conditioning zone.
When a command is issued to the heat source unit 1 to lower the blast temperature itself supplied to 0, and hot air is required,
In step 85, a command is issued to the heat source unit 1 to increase the temperature of the air supplied to the air blowing unit 30 itself.

On the other hand, if it is determined in step 82 that the aperture in the variable air volume control unit 32 is not fully opened by the opening detector (not shown), then in step 87, the aperture of the aperture is minimized. It is determined whether or not the opening is not the minimum opening. If the opening is not the minimum, the process returns to steps 80 and 81 again, and based on the room temperature detected by the sensor 33, the switching unit 31 of the blowing unit 30.
And the VAV unit 32 are feedback controlled.

On the other hand, in step 87, V
When it is determined that the opening of the throttle opening of the AV unit 32 is the minimum opening, the process further proceeds to step 88, and it is determined whether the rotation speed output of the blower is the minimum. When the rotation speed output of the blower is the minimum value, it is difficult to control the blowing temperature by adjusting the rotation speed output of the blower. Alternatively, it is determined whether or not warm air is required. If cool air is required, a command is issued to the heat source unit 1 to increase the blast temperature supplied to each blast unit 30 in step 90, Conversely, when hot air is required, in step 91, a command is issued to the heat source unit 1 to lower the blast temperature itself supplied to each blast unit 30. As described above, by adjusting the output of the blower in accordance with the opening of the VAV section of the variable air volume control section, it becomes possible to supply the minimum necessary pressure to the blower unit requiring the most pressure. Therefore, the extra static pressure consumed by other units is reduced, and energy saving operation can be performed.

The above is a detailed description of several embodiments relating to the operation modes of the air heat source type air conditioning system configured based on 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. Needless to say.

Further, the heat source unit of the air heat source type air conditioning system configured based on the present invention is not limited to the configuration shown in FIG. For example a as shown in FIG. 13 4 heat exchanger 1
6 , the compressor 17 and the second A heat exchanger 14 , the second
By connecting the heat medium circulating path connecting the B heat exchanger 15 and the fifth heat exchanger 26 to the first heat exchanger 7 , which is a refrigerant-air heat exchanger, via pipes 51a and 51b, the cooling water The air return port (R
It is possible to adopt a configuration in which the heat medium circulation path is exhausted during the exhaust from A). With this configuration, the heat source unit 1 can be manufactured more easily and at lower cost.

In the case where no VAV is provided, the blower unit can control the blowout temperature and the air volume by adjusting the opening of the switches 35 and 36 in the range of 0 to 100%. In this case, the downstream side of the unit is configured in the air chamber. When the variable air volume control is not adopted, the blowers are not variable air volume blowers, but the dampers provided in the dampers 11, 12, 13 and the first air supply line 4 are electric dampers. In addition, the supply amount of cooling and heating air can be controlled. Further, the blower unit may be provided in the air supply port of the heat source unit. In this case, a plurality of blower units are installed across the first pipeline 4 and the second pipeline 10.

Further, in the above-described embodiment, the description has been given of the embodiment in which the compressor 17 is appropriately operated according to the operation mode of the heat source unit. It is also possible to adopt a configuration in which a separate ventilation system is provided to prevent a rise in temperature.

Further, at the time of installation, it can be installed so as to be in contact with the outer wall like a normal wall-through package, installed on a ceiling or installed adjacent to a partition on the interior side, or can be installed on a partition. It can be installed and installed in a small machine room, and can supply and exhaust air through a duct installed in the ceiling. In the illustrated example, the structure in which the first, second, and third dampers 11, 12, and 13 are installed in the heat source unit 1 is shown. However, it is also possible to install each damper in an air circulation duct.

[0124]

As described above, the air-heat-source-type air-conditioning system constructed based on the present invention sets one unit of the individual air-conditioning system from the convenience of the building space, and includes the components of the air-conditioning system in the space. Can be stored, for example, a maximum of 1
Assuming a space module of about 00 m ² , heat load control and air quality control are completed in this module, so that the transfer distance of the heat medium and air is limited, and the transfer power can be reduced. Also, by configuring the air conditioning system in the space module, it is possible to standardize the configuration of the equipment and the construction work. Further, an optimal thermal environment and air quality environment can be achieved for each individual air conditioning zone.

Further, the air heat source type air-conditioning system configured according to the present invention stores heat in the vicinity of the place where the heat load is generated, so that the heat transfer power can be reduced.

Further, the air-heat-source-type air-conditioning system constructed based on the present invention can store the heat source at low cost by using nighttime electric power because the heat storage tank is installed in the heat source unit. The capacity of the compressor of the heat pump can be reduced. Further, the heat storage tank can be made to function as a thermal buffer tank at the time of simultaneous cooling and heating loads, so that the air conditioning equipment can be operated stably. Furthermore, since the distributed heat storage is performed, the structure of the heat storage tank can be simplified, and the heat insulation specification can be further simplified by installing the heat storage tank in the room.

Further, according to the configuration of the heat exchanger in the heat source unit adopted in the air heat source type air conditioning system configured according to the present invention, if cooling and heating loads are required at the same time, it is It is possible to perform heat recovery during operation. Furthermore, since heat is recovered from the exhaust air on the indoor side, energy saving is apparently unnecessary.
This makes it possible to build an air-conditioning system with excellent performance .

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a schematic device configuration of a heat source unit of an air heat source type air conditioning system configured based on the present invention.

FIG. 2 is a configuration diagram schematically showing a heat medium path of an air heat source type air conditioning system configured based on the present invention.

FIG. 3 is a configuration diagram showing a schematic device configuration of a blowing unit of the air heat source type air conditioning system configured based on the present invention.

FIG. 4 is a configuration diagram showing a schematic configuration of a heat source unit, a blowing unit, and a control system of an air heat source type air conditioning system configured based on the present invention.

FIG. 5 is an explanatory diagram showing an operation mode of a heat source unit of the air heat source type air conditioning system configured according to the present invention.

FIG. 6 is a flowchart showing a control flow at the time of an a-mode operation of the heat source unit of the air heat source type air conditioning system configured according to the present invention.

FIG. 7 is a flowchart showing a control flow at the time of an h mode operation of a heat source unit of the air heat source type air conditioning system configured based on the present invention.

FIG. 8 is a flowchart showing a basic control flow of the air heat source type air conditioning system configured based on the present invention.

FIG. 9 is a flowchart showing a flow of selecting an operation mode of a heat source unit of the air heat source type air conditioning system configured according to the present invention.

FIG. 10 is a flowchart showing a flow of selecting an operation mode of a heat source unit of the air heat source type air conditioning system configured based on the present invention.

FIG. 11 is a flowchart showing a flow of selecting an operation mode of a blower unit of an air heat source type air conditioning system configured based on the present invention.

FIG. 12 is a flowchart showing a variable air volume control flow of a blowing unit of the air heat source type air conditioning system configured based on the present invention.

FIG. 13 is a configuration diagram showing a schematic device configuration of another embodiment of the heat source unit of the air heat source type air conditioning system configured based on the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Heat source unit 2 Housing 3 1st air supply fan 4 1st air supply line 5 Exhaust fan 6 Exhaust line 7 First heat exchanger 8 Exhaust line branch line 9 2nd air supply fan 10 2nd air supply line 11 1st Damper 12 Second damper 13 Third damper 14 Second A heat exchanger 15 Second B heat exchanger 16 Third heat exchanger 17 Compressor 19 First pump 21 Heat storage tank 22 Fourth heat exchanger 23 Second pump 25 Heater 26 Fifth heat exchanger 30 Blower unit 31 Switching unit 32 Variable air volume control unit

Claims (10)

(57) [Claims] 1. An outside air intake (OA) for taking in outside air from outside the room; an indoor side air supply opening (SA) for supplying conditioned air to the air conditioning room; and an indoor side air return opening for taking in return air from the air conditioning room. (RA); an outdoor exhaust port (EA) for exhausting outdoor air to the outside; and the outdoor air intake port communicating with the indoor air supply port, and the indoor air return port being the outdoor air exhaust port and / or An air passage selectively connected to the indoor air supply port; a plurality of heat exchangers (7, 14, 15) interposed in the air passage and including at least an evaporator or a condenser; and a compressor ( 17) and a heat pump circuit provided with a decompression device; wherein the heat pump circuit is provided in an air path formed between the indoor-side return air port and the outdoor-side exhaust port. An interposed gas-liquid contact type first heat exchanger (7); A second heat exchanger (14, 15) that is interposed in an air path formed between the indoor-side return air port and the indoor-side air supply port and that can selectively function as a condenser or an evaporator. ) And an air heat source type air conditioner. Wherein said indoor return air port and the second heat exchanger interposed air path formed between the chamber inner air supply port (14, 15) includes a first 2A heat exchanger ( 14) and a second B heat exchanger (15); an air path connecting the indoor-side return air port and the indoor-side air supply port is a first air supply pipe (4) and a second air supply pipe. The second A heat exchanger (14); and the second air supply line (1).
0), the second B heat exchanger (15) is interposed in the first air supply line (4), and the second B heat exchanger (15) is connected to the outside air from the outside air intake. Characterized in that it is configured to be able to supply air.
The air heat source type air conditioner according to claim 1 . 3. The heat pump circuit according to claim 1, wherein said heat pump circuit selectively communicates with said second heat exchanger (14) and said second heat exchanger (15) via a refrigerant pipe via said compressor (17). The air heat source type air conditioner according to claim 1 or 2 , further comprising three heat exchangers (16). Wherein said first heat exchanger (7) and the third heat exchanger and (16), characterized in that to form a cooling water circulation path communicates, according to claim 1, 2 or 3 An air heat source type air conditioner according to any one of the above. 5. A further heat storage tank comprising a (21), a fourth heat exchanger for recovering the heat stored in the heat to the heat storage tank (2
2. The method according to claim 1, wherein 2) is interposed in an air path connecting the outside air intake port and the indoor side air supply port.
The air heat source type air conditioner according to any one of 1, 2, 3, and 4 . 6. A fifth heat exchanger (26) is the heat storage tank connected to the heat pump circuit through the refrigerant pipe (2
The method according to claim 4 , characterized in that it is installed in (1).
Or the air heat source type air conditioner according to 5 . 7. A humidifier and / or a filter is provided in an air path on the upstream side of the indoor side air supply port, according to any one of claims 1, 2, 3, 4, 5, 6, and 7 . An air heat source type air conditioner as described in Crab. 8. An air-conditioning space is divided into one or more air-conditioning units having a predetermined volume, and for each of the air-conditioning units, any one of claims 1, 2, 3, 4, 5, 6, 7, and 8 is provided. Characterized by installing an air heat source type air conditioner described in crab,
Air conditioning system. 9. The air-conditioning unit is further divided into one or more individual air-conditioning zones, and a ventilation unit (30) is provided for each individual air-conditioning zone. The air heat source type air conditioning system according to claim 8 , wherein air supply for air conditioning can be selectively supplied to each of the blower units (30). 10. conduit means for selectively supply the conditioned air to the each blower unit (30) from the interior side air inlet of the air heat source type air conditioner, the first supply duct (4) and the first air supply line (31a) and the second air supply line (3) respectively communicating with the second air supply line (10).
1b) for switching and / or mixing the conditioned air supplied from the first air supply line (31a) and the second air supply line (31b) to the air supply units (30), respectively. The air-heat source type air conditioning system according to claim 9 , characterized in that means (31) are provided.