JP3081461B2 - Air heat source type 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-conditioning system, and more particularly to an air-conditioning system capable of flexibly responding to an air-conditioning load requirement for each individual space and having excellent 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 cooling loads have increased due to intelligent building functions and demands for more comfortable office environments have increased, air conditioning systems in office buildings and the like have been changing from a central system to an individual distributed system. is there. 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 such a multi-type air conditioner, such a wall-through type air conditioner can omit a refrigerant pipe and the like, but requires an extremely large amount of heat source air and a COP (coefficient of performance) of the system. ), And it is not possible to obtain sufficient air-conditioning capacity depending on the outside air temperature, and its installation location and capacity are limited.
Furthermore, it is difficult to connect ducts and the like, and therefore, there is a limit to air quality control and thermal environment control.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made on the basis of the above technical point of view, and an object thereof 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 the power equipment compared to the conventional system, it is advantageous with respect to the initial cost, running cost, and life cycle cost as compared with the conventional equipment,
The thermal environment and air quality control functions are integrated in the air conditioner, so the thermal environment and air quality control functions required in each individual air conditioning zone are integrated, so the thermal environment required in each individual air conditioning zone It is possible to maintain good air quality environment and good individual control for each individual air-conditioning space, so it is most suitable for individual decentralized system. In tenant buildings, etc., clear charge sharing according to usage In addition, the system is excellent in maintainability, especially when the floor-standing built-in individual system is adopted, and the refrigerant piping and refrigerant water piping are omitted and the on-site detention is omitted despite various installation conditions. It is an object of the present invention to provide a new and improved air heat source type air conditioning system capable of simplifying and standardizing.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises at least a first heat exchanger for performing heat exchange between outside air and / or return air and a circulating heat medium. , an air-source heat type air conditioning system comprising a second heat exchanger for exchanging heat between the air supply to the heat medium and the chamber, a plurality of heat pump comprising a compressor, a first heat exchanger of the heat pump And the second heat exchanger can function as a condenser or an evaporator, and each heat pump is interposed in series in the flow path of the heat source air, and
In the flow path, the first heat exchanger of the plurality of heat pumps
It is characterized in that the heat source air is humidified and cooled on the upstream side .

[0008] The present invention, as described in claim 2,
It is also possible to apply to an air heat source type individual air conditioner in which a plurality of air heat source type heat pump units are integrally housed in one casing, or as described in claim 3 , humidification cooling of the heat source air is performed by: Gas-liquid contact type humidification cooler
In addition to a plurality of air heat source type heat pump units, a gas-liquid contact type humidifying cooler can also be applied to an air heat source type individual air conditioner integrally housed in one casing.

The invention described in claim 4 is at least as follows.
Also exchange heat between the outside air and / or return air and the circulating heat medium.
Heat exchange between the first heat exchanger and the heat medium and air supply to the room.
Heat consisting of a second heat exchanger for performing heat treatment and a compressor
An air-source air conditioning system with a pump, wherein:
The first heat exchanger and the second heat exchanger of each heat pump
The exchanger can function as a condenser or evaporator.
Each of the heat pumps has a flow path for heat source air.
And the second heat exchanger is connected to the first air supply
Third heat exchanger interposed in the road and interposed in the second air supply path
A third heat exchanger, wherein the third heat exchanger is
And the fourth heat exchanger is selectively operated according to an operation mode.
Configured to function as an evaporator or condenser
It is characterized by.

[0010] Furthermore, the present invention is, as described in claim 5, housed together two of said heat pump in one casing, a first of the first heat exchanger and the second heat pump of the first heat pump A heat exchanger and a second heat exchanger of the first heat pump and a second heat exchanger of the second heat pump are arranged in series in an air supply path while a heat exchanger and a second heat exchanger of the first heat pump are interposed in series in a flow path of the heat source air. It is also possible to adopt a configuration of interposing.

Alternatively, according to the present invention, as described in claim 6 , the two heat pumps are housed integrally in one casing, and the first heat exchanger of the first heat pump and the first heat pump of the second heat pump. And a second heat exchanger of the first heat pump and a second heat exchanger of the second heat pump in series in the air supply path. The third heat exchanger of the first heat pump and the third heat exchanger of the second heat pump unit are interposed in series in the first air supply path; It is also possible to adopt a configuration in which the fourth heat exchanger of the heat pump and the fourth heat exchanger of the second heat pump are interposed in series in the second air supply path.

[0012] humidifier regard to the condenser structure, as described in claim 7, the humidifier condenser constructed integrally with the first heat exchanger, cooling water and the humidifier condenser to the first heat exchanger Can be configured to spray or discharge water. Alternatively, according as described in claim 8, it is also possible to adopt a configuration of providing a fifth heat exchanger for exchanging heat between the heat medium in the cooling water and the heat pump circuit for supplying the humidifying cooler is there.

[0013]

[0014]

According to the air heat source type air conditioning system of the first aspect, the plurality of air heat source type heat pump units are interposed in series in the flow path of the heat source air formed by, for example, a duct. The air heat source flows into the heat exchanger on the upstream side, and the pressure difference (head) between the condensation pressure of the condenser of the air heat source type heat pump unit on the upstream side and the evaporation pressure of the evaporator is reduced. Efficiency increases. On the other hand, the efficiency of the downstream air heat source type heat pump unit is maintained substantially unchanged, so that the COP (coefficient of performance) of the entire system can be improved.
In particular, if the first heat exchanger is configured to exchange heat only between the heat medium and the return air from the room, only the exhaust gas having a volume equal to or less than the outside air introduced into the room for air quality control can be used as a heat source or a heat transfer device. It can be used as a body, and it is possible to construct an air heat source type air conditioning system which does not need a seemingly complete heat source of a completely dispersed type in which a separate device such as an outside air processing air conditioner can be omitted.

Furthermore, according to the air heat source type air conditioning system according to claim 1, in the cooling operation, since the heat exchange is guided to the condenser of the air-source heat pump unit in terms of a humidified cool air heat source, more The efficiency of the system can be improved. That is, since the condensing pressure of the air heat source type air conditioner is determined by the outlet dry bulb temperature of the heat source air, as in the present invention, the heat source air is humidified and cooled to approach a saturated state, and the dry bulb temperature is lowered. By doing so, it is possible to improve the system.

[0016] As described in claim 2, incorporating a plurality of air-source heat-type heat pump unit integrally air heat source type individual air conditioner, or as described in claim 3, a plurality of air-source heat pump unit A fully distributed air heat source air conditioning system with high operating efficiency and elimination of a separate device such as an outside air treatment air conditioner by configuring an air heat source type individual air conditioner that incorporates a humidifying cooler integrally. It is possible to construct As a result, it is possible to provide an air conditioning system which is excellent in independence of heat control and air quality control of each individual air conditioning space. In addition, by configuring the system as a completely independent decentralized system, it is possible to eliminate, simplify, and standardize on-site equipment work such as refrigerant pipes and water pipes, thereby reducing the initial cost and reliability of air conditioning equipment. Can be improved.

According to a fourth aspect of the present invention, the second heat exchanger comprises a third heat exchanger and a fourth heat exchanger, and each of the heat exchangers is provided with a first air supply path. In addition, if the air conditioner is installed in the second air supply path, it is possible to flexibly cope with a case where a cooling load and a heating load are simultaneously requested in the air-conditioned space.

According to a fifth aspect of the present invention, an air heat source type individual air conditioner is constituted by two air heat source type heat pump units to flexibly cope with various heat loads required in each individual air conditioning space. It is possible to construct a completely independent and distributed air-conditioning system that can be used. Further, as described in claim 6, by arranging the heat exchanger, it is possible corresponding against more flexible various heat load demand.

[0019] As further described in claim 7, by configuring integrally humidification cooler and a first heat exchanger, a more simple structure, exhibits the same excellent effects as According to the process 30 of the system It becomes possible.

Further, as described in claim 8, a fifth heat exchanger disposed, the configuration that performs heat exchange with heat transfer of the cooling water and the heat pump circuit for supplying the humidifying cooler This heat exchanger Further, the efficiency of the system can be improved.

[0021]

[0022]

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

FIG. 1 shows a first embodiment of an air heat source type air conditioning system constructed according to the present invention.
As shown in the figure, according to the present invention, a plurality of air heat source type heat pumps 1a, 1b, 1c arranged in the back of a room or the like.
Are arranged in series via the heat source air duct 2, and the outside air taken in from the outside air intake (OA) is sequentially circulated through each heat pump and exhausted from the exhaust port (EA).

Each of the air heat source type heat pumps includes, as shown in FIG. 2, a first heat exchanger 3 for exchanging heat between outside air and / or return air and a heat medium circulating in the heat pump circuit, and a heat medium. A second heat exchanger 4 for exchanging heat with the supply air to the room, a compressor 5, an expansion valve 6, and a four-way valve 7, and these devices are integrally formed in a casing 8. Is housed. Further, a heat source air blower 10 for introducing heat source air into the unit is provided in the casing 8.
And an air supply blower 9 for supplying conditioned air to the room
Are provided respectively.

In the air heat source type heat pump configured as described above, during the heating operation, the first heat exchanger 3 functions as an evaporator , removes heat from the heat source air, and condenses the heat. It is possible to supply warm air by radiating heat during air supply through the second heat exchanger 4 functioning as a heat exchanger. Also, during cooling operation, the second heat exchanger 4 functions as an evaporator to extract heat from the air supply to the room and to discharge the heat to the heat source air to supply cool air to the room. Is possible.

According to the present invention, as shown in FIG. 1, a plurality of air heat source type heat pumps having such a configuration are interposed in series in the flow path of the heat source air. The pressure difference (head) between the condenser and the evaporator of the heat pump unit is reduced, and the efficiency of the unit is increased. On the other hand, the efficiency of the downstream air heat source type heat pump unit is maintained substantially unchanged, so that the COP (coefficient of performance) of the entire system can be improved.

FIG. 3 shows a second embodiment of an air conditioning system constructed according to the present invention. As shown in the drawing, in this embodiment, each of a plurality of air heat source type heat pumps 1a, 1b, 1c installed in series via a heat source air duct 2 similarly to the configuration shown in FIG. Coolers 11a, 11b, 11c are interposed. With such a configuration, during the cooling operation, the air for the heat source is humidified and cooled by the humidifying coolers 11a, 11b, 11c disposed upstream of the air-source heat pumps 1a, 1b, 1c, and then the air-source heat pumps 11a, 11b,
Since the heat is led to each of the condensers 11c for heat exchange, the COP of the system can be further improved as compared with the system shown in FIG.

FIG. 4 shows a third embodiment of an air conditioning system constructed according to the present invention. In this embodiment, two air heat source type heat pump units 12A,
2B and two gas-liquid contact type humidifying coolers 13A, 13
B is housed in one casing 14. The first and second air heat source type heat pump units 12
The configuration of A, 12B is substantially the same,
In the following description, components having the same function are denoted by the same reference numerals, and the heat pump unit to which each component belongs is represented by a subscript alphabetic character (a or b), and redundant description is omitted. I will do it.

Each air heat source type heat pump unit 12
A and 12B are first heat exchangers 15a and 15b for performing heat exchange between the outside air taken in from the outside air intake (OA) and the refrigerant circulating in each heat pump circuit, respectively.
And second heat exchangers 16a, 16b, 17a, which perform heat exchange between air supplied into the room from the second air supply ports (SA1, SA2) and the refrigerant circulating in each heat pump circuit.
17b, expansion valves 18a, 18b, compressors 19a, 1
9b. In this embodiment, the second heat exchanger is interposed in series in the flow path of the air supplied from the first supply port (SA1) by the first supply blower 20. Third heat exchangers 16a, 16b
And a second air supply port (SA) by the second air supply blower 21.
2) fourth heat exchangers 17a and 17b which are interposed in series in the flow path of the air sent from the second heat exchanger. Further, each heat pump circuit has a four-way valve 22a,
22b, switching valves 23a, 23b, 24a, 24b, 25
a and 25b are interposed respectively, and as described later, by opening and closing these valves according to the operation mode, it is possible to cope with various heat loads.

Each of the humidifying coolers 13A and 13B is, for example, a small-sized cooling tower having a gas-liquid contact heat exchanger 28a capable of humidifying and cooling the outside air by spraying humidifying cooling water on the packed bed. 28b, water circulation pipes 29a, 29b
And circulating pumps 30a and 30b for humidifying cooling water, and water tanks 31a and 31b for receiving the sprinkled humidifying cooling water. Although not shown, the humidifying cooling water reduced by evaporation is appropriately supplemented. It is also possible to provide a make-up water pipe for this.

According to the present invention, the exhaust blower 4
4, the first humidifying cooler 13A, the first air heat source type configured as described above is provided in the heat source air flow passage formed between the outside air inlet (OA) and the exhaust port (EA). Since the first heat exchanger 15a of the heat pump unit 12A, the second humidifying cooler 13B, and the first heat exchanger 15b of the second air heat source type heat pump unit 12B are sequentially interposed in series, It is possible to reduce the pressure difference (head) between the condenser and the evaporator of the first air heat source type heat pump unit 12A on the side and to increase the efficiency. On the other hand, the efficiency of the air-source heat pump unit 12B on the downstream side is maintained almost as it is, so that the air conditioning system C
OP can be improved. Further, according to the configuration shown in the drawing, during the cooling operation, the air for the heat source, which is the exhaust heat destination of each of the first heat exchangers 15a and 15b functioning as the condenser, is humidified and cooled by the humidifying coolers 13A and 13B in advance. , It is possible to drive the system at a higher COP.

Next, various operation modes of the air conditioning system shown in FIG. 4 will be briefly described. (1) Cooling operation mode At the time of cooling operation, each heat pump unit 12A, 12A
By switching the four-way valve of B and each switching valve, the refrigerant of the heat pump circuit is supplied to the compressors 19a and 19b → the four-way valve 22a,
22b → first heat exchangers 15a, 15b → switching valve 24
a, 24b → expansion valves 18a, 18b → third heat exchanger 1
6a, 16b → four-way valve 22a, 22b → compressor 19a,
19b, the first heat exchanger 1
5a and 15b function as condensers, and the third
By making the heat exchangers 16a and 16b function as evaporators, heat is removed from the air supplied into the room from the first air supply port (SA1), and the heat is removed from the humidifying coolers 13A and 13A.
By exhausting heat into the heat source air pre-humidified and cooled by 3B, it is possible to supply desired cold air into the room from the first air supply port (SA1) with a high COP.

(2) Heating operation mode During the heating operation, each of the heat pump units 12A, 12A
By switching the four-way valve of B and each switching valve, the refrigerant of the heat pump circuit is supplied to the compressors 19a and 19b → the four-way valve 22a,
22b → third heat exchangers 16a, 16b → expansion valve 18
a, 18b → switching valves 24a, 24b → first heat exchanger 1
5a, 15b → four-way valve 22a, 22b → compressor 19a,
19b, the first heat exchangers 15a, 15b
Function as an evaporator, and the third heat exchanger 1
By making the 6a and 16b function as condensers, the heat extracted from the exhaust is radiated during the supply to the room, so that the warm air can be supplied to the room from the first supply port (SA1). It is possible. During the heating operation, the humidification cooling water pumps 30a and 30b are stopped, and the humidified cooling water is directly supplied to the first heat exchangers 15a and 15b while maintaining the air state of the outside air taken in from the outside air intake (OA).

(3) Simultaneous cooling and heating operation mode (during cooling operation) When cooling and heating are simultaneously requested in the air-conditioned space during cooling operation, the four-way valve and each switching valve of each heat pump 12A, 12B are switched from the cooling operation mode. The refrigerant in the heat pump circuit is switched to the compressors 19a and 19b by switching.
→ Four-way valves 22a, 22b → First heat exchangers 15a, 15
b → switching valves 23a, 23b → fourth heat exchanger 17a, 1
7b → switching valves 25a, 25b → expansion valves 18a, 18b →
Third heat exchanger 17a, 17b → four-way valve 22a, 22b
→ Circulate sequentially with the compressors 19a and 19B to make the first heat exchangers 15a and 15b and the fourth heat exchangers 17a and 17b.
Function as a condenser and the third heat exchanger 1
A heat pump circuit that makes 6a and 16b function as an evaporator can be configured to supply cold air from the first air supply path (SA1) and hot air from the second air supply path (SA2). .

(4) Simultaneous cooling and heating operation mode (at the time of heating operation) On the other hand, when the cooling load is simultaneously required in the air-conditioned space during the heating operation, the four-way valve of each heat pump 12A, 12B is switched from the heating operation mode. By switching the switching valves, the heat medium of the heat pump circuit is supplied to the compressors 19a, 1a and 1b.
9b → four-way valve 22a, 22b → third heat exchanger 16a,
16b → expansion valves 18a, 18b → switching valves 25a, 25b
→ Fourth heat exchanger 17a, 17b → Switching valves 23a, 23
b → first heat exchangers 15a, 15b → four-way valve 22a, 2
2b → the compressors 19a and 19b are sequentially circulated, and the first heat exchangers 15a and 15b and the fourth heat exchangers 17a and 17a,
7b functions as an evaporator, and a heat pump circuit is configured to function as a third heat exchanger 17 as a condenser. Hot air is supplied from a first air supply path (SA1), and a second air supply path is provided. (SA2) It is possible to supply cooler air.

FIG. 5 shows still another embodiment of an air heat source type air conditioning system constructed according to the present invention. The basic configuration of this air conditioner is almost the same as the air conditioner shown in FIG. Therefore, components having the same function are denoted by the same reference numerals, and detailed description is omitted. However, in the air conditioner shown in FIG.
Unlike the air conditioner shown in FIG. 1, the outside air intake (OA) is omitted, and a part of the return air (SRA) from the room sucked from the return air opening (RA) is supplied to the humidifying coolers 28a, 28b and the first air conditioner.
Are sent to the heat exchangers 15a and 15b, and are used as heat sources. As described above, in the embodiment shown in FIG. 5, since the exhaust gas from the room is used as the heat source, it is possible to configure a self-contained heat pump unit air conditioner that apparently does not require a heat source.

Next, still another embodiment of the air heat source type air conditioning system constructed according to the present invention will be described with reference to FIG.

In this embodiment, the first heat exchanger which exchanges heat with the heat medium of the heat pump circuit using the humidified cooler of the air conditioner and the humidified and cooled air as the heat source described in relation to the previous embodiment. Are integrated, and the sixth heat exchangers 31a, 31
b. This sixth heat exchanger 31a, 31b
Is, for example, a sealed type small cooling tower design, distributed to the capacitor
This is a gas-liquid direct contact type heat exchanger capable of cooling the heat medium by discharging water or water.
a, 32b circulates the cooling water, the sixth heat exchanger 3
Since the ability as a heat source of air is enhanced by spraying or discharging water to 1a and 31b, an air heat source type air conditioning system having a simpler configuration and a higher COP can be provided. This embodiment has a configuration in which two pairs of heat pump circuits and a humidifying cooler are installed in one casing, similarly to the previous embodiment, and the configuration and function of each unit are substantially the same. In the following description, components having the same function are denoted by the same reference numerals, and the heat pump unit to which each component belongs is represented by a subscript alphabetic character (a or b), and redundant description is omitted. I will do it.

The heat pump circuit of this embodiment comprises the sixth heat exchangers 31a and 31b and the first air blower 3
A third heat exchanger 34a, 34b installed in a first air supply path (SA1) having an air inlet 3 and performing heat exchange between indoor air supply and a heat medium of a heat pump circuit; Blower 3
Eighth heat exchangers 36a and 36b, which are installed in the second air supply path (SA2) having the air conditioner 5 and exchange heat between the indoor air supply and the heat medium of the heat pump circuit, and the compressors 37a and 37b.
, Four-way valves 38a, 38b, switching valves 39a, 39b,
40a, 40b, 41a, 41b and expansion valves 42a, 4
2b. And the exhaust blower 43
By using a part of the return air from the room (SRA) taken in from the return air port (RA) as the heat source of the sixth heat exchangers 31a and 31b, the first and second air supply paths ( SA1 and SA2), it is possible to supply desired air indoors. According to the present invention, since the sixth heat exchangers 31a and 31b of the two heat pump units installed in the casing are interposed in series in the path of the air for the heat source, the system can be driven with a high COP. Becomes possible. In the illustrated example, air exhausted from the room to the outside is used as a heat source, and the heat source is apparently not used. However, the present invention is not limited to such a structure. For example, the outside air intake (O
A) It is also possible to adopt a configuration in which the outside air taken in is used as a heat source.

The air-heat source type air conditioning system configured as described above has four-way valves 38a and 38b and switching valves 39a,
By switching between 39b, 40a, 40b, 41a and 41b, the following operation can be performed.

(1) Cooling operation mode The circulating pumps 32a and 32b are driven to spray water to the sixth heat exchangers 31a and 31b, and the heat medium of the heat pump circuit is supplied to the compressors 37a and 37b → square. Valve 38
a, 38b → sixth heat exchanger 31a, 31b → switching valve 3
9a, 39b → expansion valves 42a, 42b → seventh heat exchangers 34a, 34b → four-way valves 38a, 38b → compressor 37
a, 37b, and the sixth heat exchangers 31a, 3b
1b functions as a condenser, and a heat pump circuit configured to function the seventh heat exchangers 34a and 34b as evaporators can supply cool air from the first air supply path (SA1) to the room. is there.

(2) Simultaneous cooling and heating operation mode (during cooling operation) When a heating load is also required during cooling operation, each switching valve is switched so that the heat medium of the heat pump circuit is supplied to the compressors 37a and 37b → four directions. Valves 38a, 38b → sixth heat exchangers 31a, 31b → switching valves 40a, 40b → eighth heat exchangers 36a, 36b → switching valves 41a, 41b → expansion valve 4
2a, 42b → the seventh heat exchangers 34a, 34b → the four-way valves 38a, 38b → the compressors 37a, 37b are sequentially circulated, and the sixth heat exchangers 31a, 31b and the eighth heat exchangers 36a, 36b While functioning as a condenser,
A heat pump circuit that functions the seventh heat exchangers 34a and 34b as an evaporator is configured, and the first air supply path (SA
1) It is possible to supply cold air from the second air supply path (SA2) and cool air to the room.

(3) Heating operation mode During the heating operation, the circulation pumps 32a and 32b are stopped,
No water is sprayed on the sixth heat exchangers 31a and 31b. Then, the heat medium of the heat pump circuit is transferred to the compressor 37.
a, 37b → four-way valves 38a, 38b → seventh heat exchanger 3
4a, 34b → expansion valves 42a, 42b → switching valve 39a,
39b → sixth heat exchanger 31a, 31b → four-way valve 38
a, 38b → circulate sequentially with the compressor, and the sixth heat exchanger 3
1a and 31b function as evaporators,
A heat pump circuit that makes the heat exchangers 34a and 34b function as condensers can supply warm air from the first air supply path (SA1) into the room.

(4) Simultaneous cooling and heating operation mode (at the time of heating operation) When a cooling load is also required during the heating operation, each switching valve is switched so that the heat medium of the heat pump circuit is supplied to the compressors 37a and 37b → Four-way valves 38a, 38b → seventh heat exchangers 34a, 34b → expansion valves 42a, 42b → switching valve 4
1a, 41b → eighth heat exchangers 36a, 36b → switching valves 40a, 40b → sixth heat exchangers 31a, 31b → four-way valves 38a, 38b → compressors 37a, 37b to circulate sequentially, and the seventh heat A heat pump circuit is provided in which the heat exchangers 34a and 34b function as condensers, and the sixth heat exchangers 31a and 31b and the eighth heat exchangers 36a and 36b function as evaporators. SA1) warm air from the second air supply path (SA2),
It can be supplied indoors.

FIG. 7 shows still another embodiment of the air heat source type air conditioning system constructed according to the present invention. The basic configuration of this air conditioner is almost the same as the air conditioner shown in FIG. Therefore, components having the same function are denoted by the same reference numerals, and detailed description is omitted. However, in the air conditioner shown in FIG.
Unlike the air conditioner shown in FIG. 5, fifth heat exchangers 45a and 45b for exchanging heat between the heat medium circulating in the heat pump circuit and the cooling water supplied to the humidifying coolers 28a and 28b are provided. , Switching valves 46a, 46b, 47a, 47
b, the fifth heat exchangers 45a, 45
5b can be incorporated into a heat pump circuit. As a result, in addition to the operation mode described with reference to FIG. 5, in the cooling load mode, the heat medium of the heat pump circuit is supplied to the compressors 19a, 19b → the four-way valve 22a,
22b → switching valves 47a, 47b → fifth heat exchanger 45
a, 45b → switching valves 46a, 46b → expansion valves 18a, 1
8b → third heat exchangers 16a, 16b → four-way valve 22a,
22b → the compressors 19a and 19b are sequentially circulated, and the fifth heat exchangers 45a and 45b are made to function as condensers.
A heat pump circuit that allows the heat exchangers 16a and 16b to function as an evaporator. The heat extracted from the air supplied into the room by the third heat exchangers 16a and 16b is converted into a heat medium / refrigerant. Exhaust blower 4 is provided by humidifying coolers 28a, 28b, which are gas-liquid direct contact heat exchangers, via fifth heat exchangers 45a, 45b, which are heat exchangers.
It is possible to dissipate heat to the return air (SRA) supplied by 4. In that case, according to the present invention, the first heat exchangers 15a and 15b of the two heat pump circuits are interposed in series in the path of the heat source air, so that the system can be operated with a high COP. Becomes

The air heat source type air conditioning system according to the present invention is configured as described above, and it becomes possible to install an air conditioner on the interior side of the air conditioning space at the time of construction. When actually installing an air conditioning system, the air conditioning space such as an office building is divided into one or more air conditioning units having a predetermined volume and modularized. It is possible to construct a distributed air conditioning system. This 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 used.
Is set as a standard, it is possible to set an air conditioning unit applied thereto to about 100 m ² which is 7 m wide in contact with the outer wall surface. Therefore, an air conditioning system for an entire air conditioning space such as a building can be constructed by repeating this air conditioning unit.

FIG. 8 shows an arrangement of an air conditioner 50 and a plurality of blower units 51a, 51b... 51n installed in each air conditioning unit. The air conditioner 50 is, for example, as shown in FIG.
To the first air supply port (SA1) and the second air supply port (SA1) as shown in FIG.
The air conditioner 50 and each blower unit 51n are connected by first and second blower ducts 52a and 52b corresponding to the respective air inlets. Cooling air or hot air is supplied to each blowing unit 5
1n, and an optimal amount and temperature of air are supplied from the blower unit 51n to each individual air conditioning zone. Each air conditioning zone is provided with a sensor 53a, 53b... 53n for detecting a temperature and humidity environment in the zone.
The detection signals of these sensors 33n are sent to each air blowing unit 51.
n and / or by sending to the air conditioner 50, it becomes possible to drive the air heat source type air conditioning system in each operation mode.

Blower unit 5 installed in each air conditioning zone
Reference numeral 1 denotes a hot air or cold air switching unit 54 and a variable air volume unit (VAV: Variable Air Volume) 5 as shown in FIG.
And 5. The first and second air supply ports (SA1, SA2) of the air conditioner 50 correspond to the first and second air supply ports, respectively.
And the cool air or hot air supplied to each blower unit 51 through the second ducts 52a and 52b
It is introduced into the switching section 54 from the ports 6 and 57, and by selectively opening and closing the switches 58 and 59 in the duct, it is possible to selectively switch between hot air and cold air. The selected air is adjusted in the variable air volume unit 55 by returning the air volume of the air supplied from the throttle port 61 by the movement of the core 60 to adjust the air blown from the air supply port 62, and to adjust the room temperature. Can be adjusted to an optimum value.

While some preferred embodiments of the present invention have been described with reference to FIGS. 1 to 9, the present invention is not limited to such embodiments and is described in the claims. Various changes and modifications are possible within the scope of the technical idea, and it is understood that such changes and modifications are also included in the scope of the present invention.
In particular, the heat source piping, the humidifying cooling water piping, the arrangement and air path of each heat exchanger, in addition to the above-described embodiment, those skilled in the art can conceive various modifications and corrections, It is understood that they are also included in the scope of the present invention.

[0050]

As described above, according to the present invention,
Since the air heat source type heat pump unit is connected in series in the flow path of the air for the heat source, the pressure difference (head) between the condenser and the evaporator of the upstream air conditioner can be reduced without reducing the efficiency of the downstream air conditioner. It is possible to reduce and increase the efficiency. Further, according to a configuration in which humidified and / or cooled air is used as a heat source in combination with a humidifying and cooling unit, it is possible to provide an air heat source type air conditioning system with a higher COP.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an embodiment of an air heat source type air conditioning system configured based on the present invention.

FIG. 2 is a schematic configuration diagram showing an example of an air heat source type heat pump unit applicable to the air heat source type air conditioning system shown in FIG.

FIG. 3 is an explanatory diagram showing a schematic configuration of another embodiment of an air heat source type air conditioning system configured based on the present invention.

FIG. 4 is a configuration diagram showing a refrigerant pipe and a water pipe of one embodiment of an integrated air heat source type air conditioner configured based on the present invention.

FIG. 5 is a configuration diagram showing a refrigerant pipe and a water pipe of another embodiment of the integrated air heat source type air conditioner configured according to the present invention.

FIG. 6 is a configuration diagram showing a refrigerant pipe and a water pipe of another embodiment of the integrated air heat source type air conditioner configured according to the present invention.

FIG. 7 is a configuration diagram showing a refrigerant pipe and a water pipe of another embodiment of the integrated air heat source type air conditioner configured according to the present invention.

FIG. 8 is an explanatory diagram showing a schematic arrangement of an air conditioner and a blower unit that can be employed in an air heat source type air conditioning system configured based on the present invention.

FIG. 9 is an explanatory diagram showing a schematic configuration of a blowing unit that can be employed in an air heat source type air conditioning system configured according to the present invention.

[Explanation of symbols]

 15a, 15b First heat exchanger 16a, 16b Third heat exchanger 17a, 17b Fourth heat exchanger 18a, 18b Expansion valve 19a, 19b Compressor 28a, 28b Humidifying cooler 30a, 30b Humidifying cooling water pump

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-182535 (JP, A) JP-A-49-76145 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 3/044 F24F 3/14

Claims (8)

(57) [Claims] Claims 1. At least outside air and / or return air
Circulation heatMediumA first heat exchanger for performing heat exchange withMediumWhen
A second heat exchanger for performing heat exchange with supply air to the room, and a compressor
Air-conditioning air-conditioning system with multiple heat pumps
The system: the first heat exchanger and the front of each heat pump
The second heat exchanger functions as a condenser or an evaporator.
Each heat pump may be connected in series with a flow path of air for a heat source.
Interposed, In the flow path of the heat source air, the plurality of heat
Humidification of the heat source air upstream of the first heat exchanger of the pump
Cooling An air heat source type air conditioning system characterized by the following. 2. The air heat source type air conditioning system according to claim 1 , wherein the plurality of heat pumps constitute an air heat source type individual air conditioner integrally housed in one casing. 3. The humidifying cooling of the heat source air is performed by gas-liquid contact.
A plurality of heat pumps and the gas-liquid contact type humidification cooler constitute an air heat source type individual air conditioner integrally housed in one casing. The air heat source type air conditioning system according to claim 1 . 4. At least outside air and / or return air
A first heat exchanger for performing heat exchange with the circulating heat medium,
A second heat exchanger for performing heat exchange with supply air to the room, and a compressor
Air-conditioning air-conditioning system with multiple heat pumps
System: the first heat exchanger and the second heat exchanger of each heat pump.
Heat exchangers should function as condensers or evaporators
Are possible; each heat pump, in series with the flow path of the air heat source
Is interposed, the second heat exchanger, third interposed in the first air supply path
A heat exchanger and a fourth heat exchanger interposed in the second air supply path.
The third heat exchanger and the fourth heat exchange
The evaporator or condenser can be selectively used depending on the operation mode.
Air heat characterized by being configured to function as
Source type air conditioning system. 5. The two heat pumps are housed integrally in one casing, and the first heat exchanger of the first heat pump and the first heat exchanger of the second heat pump are arranged in a flow path of a heat source air. 2. The air conditioner according to claim 1, wherein a second heat exchanger of the first heat pump and a second heat exchanger of the second heat pump are interposed in series in an air supply path, while being interposed in series . The air heat source type air conditioning system according to any one of 2, 3, and 4 . 6. The two heat pumps are housed integrally in one casing, and the first heat exchanger of the first heat pump and the first heat exchanger of the second heat pump are disposed in a flow path of air for a heat source. While being interposed in series, the second heat exchanger of the first heat pump and the second heat exchanger of the second heat pump are interposed in series in the air supply path, and further, the second heat exchanger of the first heat pump is The third heat exchanger and the third heat exchanger of the second heat pump unit are interposed in series in the first air supply path, and the fourth heat exchanger of the first heat pump and the third heat exchanger The air heat source type air conditioning system according to claim 4 , wherein a fourth heat exchanger of the two heat pumps is interposed in series in the second air supply path. 7. The humidifying cooler is integrally formed with the first heat exchanger, and is configured to spray or discharge cooling water to the first heat exchanger.
An air heat source type air conditioning system according to claim 3 . 8. A heat pump for heat exchange between cooling water supplied to the humidifying cooler and the heat medium of a heat pump.
Characterized in that a heat exchanger, according to claim 3 or 5
4. The air heat source type air conditioning system according to 1.