JPH0130061B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner in a building having a large indoor space.

BACKGROUND TECHNOLOGY Air conditioners for buildings with indoor spaces can be roughly divided into water-source heat pump systems that use water as a heat source, and air-source heat pump systems. All of these can be equipped with individual air conditioning systems.

Problems to be Solved by the Invention The water source heat pump system that has been generally employed in the past has had many problems in terms of water leakage and water quality control. In order to solve these problems, an air source heat pump system was developed. However, with the conventional air source heat pump system,
As shown in No. 16344, even though each room can be air-conditioned individually, there is no way to maintain reasonable heat between the second air-conditioning zone, e.g., the perimeter zone, and the first air-conditioning zone, e.g., the interior zone, in each room. It was not possible to exchange heat, that is, to recover heat. The present invention responds to the simultaneous demands for heating and cooling that occur in the second and first air-conditioning zones indoors by quickly recovering heat from the first air-conditioning zone and transferring it to the first air-conditioning zone in the winter. It can be used to heat the second air-conditioning zone, and in the summer, the heat in the first air-conditioning zone is quickly released to the outside air.

Means to Solve the Problem Today, various types of OA equipment are being introduced into companies, offices, etc. Most of these devices are installed in the first air conditioning zone, such as the interior zone, in relation to the human work space. These devices generate a large amount of heat as they operate. Therefore, even in winter when heating is required in the second air-conditioned zone, for example, the perimeter zone, in such an office or the like, the first air-conditioned zone always requires cooling. This is the first air conditioning zone for the studio, computer room, and second air conditioning zone.
The same applies when an office near a studio or computer room is used as an air conditioning zone. Therefore, the present invention provides a first air conditioning zone where cooling load occurs even in winter;
In the second air conditioning zone where the heat recovered in the first air conditioning zone can be used for heating and which is reachable by refrigerant piping, independently operating refrigerant-type air conditioners are installed, and refrigerant piping and ducts are installed as necessary. This allows heat to be transferred to and from the air conditioner via the air conditioner.

Function The device of the present invention cools the first air conditioning zone to operate the above-mentioned equipment under optimal conditions, and also recovers heat from the equipment by the indoor heat exchanger in the second air conditioning zone, especially in winter. This is then used to heat the second air conditioning zone, thereby saving heating energy.

Examples In the following examples, the first air conditioning zone, i.e., the interior zone where cooling load occurs even in winter, is used, and the second air conditioning zone, i.e., the first air conditioning zone, uses the recovered heat for heating. The perimeter zone will be described as an example of a location (approximately 15 meters) that can be reached by refrigerant piping.

FIG. 1 shows the operating state of the air conditioner of the present invention in winter.

Heat-generating equipment is installed in the interior zone 12 of the office space, and even in winter, it is necessary to provide air conditioning to prevent the temperature of the surrounding environment of the equipment from rising. On the other hand, the perimeter zone 10 needs to be heated.

Perimeter zone 10 and interior zone 1
Air conditioners 16 and 18 using refrigerants are installed in the ceiling 14 above the air conditioner 2, respectively. These air conditioners 16, 18 are known per se, and each consist of outdoor units 16a, 18a and indoor units 16b, 18b.

The indoor units 16b and 18b each have an indoor ventilation duct 2.
0, 22 and the indoor air intake ducts 24, 26 to form a perimeter zone 10 and an interior zone 1.
It is connected to 2.

In addition, the outdoor units 16a and 18a are each connected to the exhaust duct 2.
8, 30 and air supply ducts 32, 34, both communicate with the outdoors.

The outdoor unit 16a of the perimeter air conditioner 16 is provided with one heat exchanger 16c. Indoor unit 16
b is provided with two heat exchangers 16d and 16e. On the other hand, the outdoor unit 18a of the interior side air conditioner 18
and one heat exchanger 18 for each indoor unit 18b.
c, 18d are provided. Each heat exchanger is filled with refrigerant.

A heat exchanger 16c of the perimeter outdoor unit, one heat exchanger 16d of the perimeter indoor unit,
are connected to each other by conduits 38, 42, each having a compressor 36 and a capillary tube 40 therebetween.

The heat exchanger 18c of the interior-side outdoor unit and the heat exchanger 18d of the interior-side indoor unit are similarly composed of conduits 46, 47 having a compressor 44 in the middle, conduits 50, 5 having a capillary tube 48, etc.
1 are connected to each other.

Further, conduits 52 and 54 coming out from the second heat exchanger 16e in the indoor unit 16b on the perimeter side are connected to conduits 50, 51, 46, and 47 connecting the heat exchangers 18c and 18d on the interior side, respectively. It is connected. Therefore, the refrigerant from the heat exchanger 18d of the indoor unit on the interior side can flow from the conduit 47 through the compressor 44, through the conduit 46, and into the heat exchanger 18c of the outdoor unit on the interior side. The second heat exchanger 16e of the indoor unit on the perimeter side
It can also flow into Similarly, the refrigerant passes from the heat exchanger 18c of the interior side outdoor unit through the conduit 50, passes through the capillary tube 48, etc., and passes through the conduit 51 to the heat exchanger 18d of the interior side indoor unit. It can be circulated from the second heat exchanger 16e through conduit 52, through capillary tube 48, etc., and through conduit 51.

These flow paths are then appropriately valved by the perimeter zone thermostat 56.

The winter operation shown in FIG. 1 is a case where the interior load and the perimeter load are balanced. A perimeter zone thermostat 56 communicates the heat exchanger 18d of the interior indoor unit only to the second heat exchanger 16e of the perimeter indoor unit.

In Figure 1, the perimeter side is heated,
It is necessary to cool the interior side. For this purpose, the second heat exchanger 16e of the indoor unit on the perimeter side is operated as a condenser, and the second heat exchanger 16e is operated as a condenser.
Heat exchanger 18d of the interior indoor unit communicating with
can be operated as an evaporator. Note that the other heat exchangers 16c, 16d, and 18c are inactive. In other words, the air on the interior side flows into the indoor air intake duct 2.
6, the air enters the indoor unit 18b, is cooled by the evaporation of the refrigerant in the heat exchanger 18d, which acts as an evaporator, and is discharged to the interior side through the indoor ventilation duct 22, thus cooling is performed. On the other hand, the refrigerant having thermal energy recovered from the interior side enters the heat exchanger 16e, which acts as a condenser for the perimeter indoor unit 16b, from the conduit 47 through the conduit 54, and releases heat by condensation. This heat heats the air entering from the indoor air intake duct 24 on the perimeter side and flowing out from the indoor air blowing duct 20, thereby heating the perimeter side. The condensed liquid refrigerant enters the capillary tube 48 through the conduit 52, is depressurized there, enters the heat exchanger 18d again via the conduit 51, and repeats the above operation.

Here, the room temperature of the interior zone by the interior zone air conditioner is controlled by a dedicated thermostat (not shown), and the room temperature of the perimeter zone by the perimeter zone air conditioner is controlled by a dedicated thermostat (not shown).

FIGS. 2 and 3, like FIG. 1, show operating conditions in winter. Although FIG. 1 shows a case where the heating of the perimeter zone 10 is balanced by the heat from the interior zone 12, that is, a case where the heat loads of both zones 10 and 12 are balanced with each other, FIG.
The operating state when the heating load of the perimeter zone 10 is large is shown. In this case, the difference from FIG. 1 is that the outdoor unit 1 in the perimeter zone 10
6a heat exchanger 16c and heat exchanger 16d of indoor unit 16b are operating. That is,
In order to allocate the heating load of the perimeter zone 10, the heat exchanger 16d of the indoor unit 16b of the perimeter zone 10 operates as a condenser, and the outdoor unit 1
The heat exchanger 16c of 6a is operated as an evaporator. With this operation, the perimeter zone 10 is heated by the action of the two heat exchangers 16d and 16e, and the intended purpose can be achieved.

FIG. 2 shows the operating state when the heating load on the perimeter zone 10 is small. In this case, the difference from FIG. 1 is that the outdoor unit heat exchanger 18c of the interior zone 12 is operated at the same time. That is, since the heating load in the perimeter zone 10 is small, the outdoor unit heat exchanger 18c in the interior zone 12 is operated as a condenser simultaneously with the indoor unit heat exchanger 16e in the perimeter zone. Due to this operation, the refrigerant is liquefied by the two heat exchangers 16e and 18c, and as a result, the heat that must be dissipated when the heating load in the perimeter zone becomes smaller is processed by the heat exchanger 18c. The heat is then released to the outdoors from the outdoor unit exhaust duct 30 in the interior zone 12.

In this way, the air conditioning of the perimeter zone 10 can be optimally achieved in three stages.

Of course, if necessary, in order to heat both the perimeter zone 10 and the interior zone 12, the indoor heat exchanger 16d of the perimeter zone 10 and the indoor heat exchanger 18d of the interior zone 12 can be used as condensers; The 10 outdoor heat exchangers 16c and the outdoor heat exchangers 18c of the interior zone 12 can also function as evaporators. Furthermore, air conditioning only in the perimeter zone 10 or only in the interior zone 12 can be carried out freely as well.

Figure 4 shows the operating status in summer. During this period, it is necessary to cool both the perimeter zone and the interior zone. For this purpose, the heat exchanger 18d of the interior-side indoor unit and the heat exchanger 18c of the interior-side outdoor unit are operated in combination by respective dedicated thermostats (not shown).
Also, the first heat exchanger 16d of the indoor unit on the perimeter side
It is operated in combination with the heat exchanger 16c of the perimeter outdoor unit. At this time, the second heat exchanger 16e of the indoor unit on the perimeter side is inactive. Thus, the heat exchangers 18d and 16d of the indoor units on the interior side and the perimeter side function as evaporators, and the heat exchangers 18c and 16c of the outdoor units function as condensers.

That is, the high-temperature air emitted by the OA equipment in the interior zone 12 and the high-temperature air in the perimeter zone 10 are sucked into the indoor units 18b, 16b via the indoor air intake ducts 26, 24, respectively. This air is now transferred to a heat exchanger 18 which acts as an evaporator.
d and 16d, and is blown out from the indoor ventilation ducts 22 and 20 to the interior zone 12 and the perimeter zone 10, respectively, to cool those zones.

On the other hand, the refrigerant containing indoor thermal energy enters the heat exchangers 16c and 18c, which now act as condensers, in the outdoor units 16a and 18a, respectively, and releases its heat there. The heat released here is transferred to the outdoor units 16a and 18a through the air supply ducts 32 and 34, respectively.
The air enters the room and is exhausted to the outside via exhaust ducts 28 and 30.

In this way, in the present invention, during winter operation,
By releasing the heat recovered in the interior zone to the perimeter zone without exhausting it to the outside air, heating energy in the perimeter zone can be significantly saved. That is, the heat in the interior zone is recovered into a refrigerant by the interior treatment heat pump, and this heat is radiated by the heat radiation coil in the perimeter treatment heat pump, and is used as heat for heating. This is particularly advantageous when used in large-scale buildings, and has the advantage of facilitating the design of heat recovery systems for individual air conditioning systems.

In the above example, one air conditioner was installed in the ceiling on the perimeter side and one in the ceiling on the interior side, but of course it is possible to use more air conditioners at the same time, or to install all the air conditioners in the ceiling on the perimeter side. It is also possible to install an air conditioner, and it is also possible to use a separate type air conditioner.

In addition to the interior zone, the first air-conditioning zone includes studios, which have a cooling load even in winter.
In addition to the perimeter zone, the second air-conditioning zone is located near a studio or computer room where the heat recovered in the first air-conditioning zone can be used for heating and where the refrigerant piping is bent. There are offices and other areas where

Effects of the Invention The heat obtained by processing the cooling load in the first air-conditioning zone during the winter can be utilized to the maximum extent for processing the heating load in the second air-conditioning zone during the same period, resulting in a significant energy saving effect.

[Brief explanation of drawings]

1, 2, and 3 are diagrams showing the operating state of the present invention in the winter season, and FIG. 4 is a diagram showing the operating state in the summer season. Explanation of symbols, 10: Perimeter zone, 1
2: Interior zone, 14: Inside the ceiling, 16,1
8: Air conditioner, 16a, 18a: Outdoor unit, 16b,
18b: indoor unit, 20, 22: indoor ventilation duct,
24, 26: Indoor air intake duct, 28, 30: Exhaust duct, 32, 34: Air supply duct, 36, 44:
Compressor, 40, 48: Capillary tube, 5
6: Perimeter zone thermostat.

Claims (1)

[Claims] 1. Heat recovery using a refrigerant as a heat recovery means, which recovers the heat obtained in the cooling load process of the first air conditioning zone 12 and uses this heat to process the heating load of the second air conditioning zone 10. In the system, the indoor unit 16b of the second air conditioning zone air conditioner 16
The heat exchanger 16e housed in the second zone air conditioner 16 is directly connected to the heat exchanger 18d housed in the indoor unit 18b of the first air conditioning zone air conditioner 18, and the second zone air conditioner 16 internal heat exchanger 16e as a condenser, and a heat exchanger 18d of the air conditioner 18 for the first air conditioning zone.
A heat recovery system characterized by operating a refrigerant cycle as an evaporator. 2 Outdoor unit 18 of the first air conditioning zone air conditioner 18
The heat exchanger 18c housed in the second
Directly connected to a heat exchanger 16e housed in the indoor unit 16b of the air conditioner 16 for the first air conditioning zone and a heat exchanger 18d housed in the indoor unit 18b of the air conditioner 18 for the first air conditioning zone, The second air conditioning zone air conditioner 16 internal heat exchanger 16e and the first air conditioning zone air conditioner 18 internal heat exchanger 18c are used as condensers, and the first air conditioning zone air conditioner 18 heat exchanges. 2. The heat recovery system according to claim 1, wherein the refrigerant cycle is operated using the vessel 18d as an evaporator. 3 Air conditioner 1 for the second air conditioning zone that communicates with the outside air via the air supply duct 32 and the exhaust duct 28
The indoor unit of the second air conditioning zone air conditioner 16 has an outdoor unit 16a of No. 6 having one heat exchanger 16c and communicates with the second air conditioning zone via the air blower duct 20 and the indoor air intake duct 24. The outdoor unit 18a of the first air conditioning zone air conditioner 18 is connected to one
It has two heat exchangers 18c, and an indoor ventilation duct 22.
an air conditioner 18 for a first air conditioning zone that communicates with the first air conditioning zone via the indoor air intake duct 26;
The indoor unit 18b has one heat exchanger 18d,
The outdoor unit heat exchanger 16c of the second air conditioning zone air conditioner 16 is connected to the first heat exchanger 16d of the indoor unit 16b of the second air conditioning zone air conditioner 16, and the first air conditioning zone air conditioner 18 The outdoor unit heat exchanger 18c is connected to the indoor unit heat exchanger 18d of the first air conditioning zone air conditioner 18, and the second heat exchanger of the outdoor unit 16b of the second air conditioning zone air conditioner 16. 1
6e is also connected to the outdoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18, and the refrigerant that has passed through the outdoor unit heat exchanger 18d of the first air conditioning zone air conditioner 18 is transferred to the second air conditioner. Any one of the indoor unit second heat exchanger 16e of the zone air conditioner 16 and the outdoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18
It has a control means 56 controlled by the second air conditioning zone thermostat for sending the necessary amount of heat corresponding to the amount of heat load to one or both. The heat exchanger 18d of the indoor unit for the zone is connected to the second heat exchanger 16e or 16e and 18c of the indoor unit for the second air-conditioning zone, and during non-heat recovery, the control means 56 connects the indoor unit of the first air-conditioning zone. The heat recovery system according to claim 2, wherein the heat exchanger 18d is connected to the heat exchanger 18c of the outdoor unit for the first air conditioning zone. 4 The air that has passed through the indoor air intake duct 24 in the second air conditioning zone air conditioner is first 16e, then 16
The heat recovery system according to claim 2, wherein the recovered heat can be preferentially utilized to the maximum extent by blowing air into the room through the air supply duct 20. 5. The heat recovery system according to claim 1 or 2 or 3 or 4, wherein all the air conditioners are housed in the ceiling. 6 Claims 1 or 2 or 3 or 4 or 5, characterized in that the first air conditioning zone is an interior zone and the second air conditioning zone is a perimeter zone. Heat recovery system as described. 7 Claims 1 or 2 or 3, characterized in that the first air conditioning zone is a studio and the second air conditioning zone is an office adjacent thereto.
The heat recovery system according to item 1 or 4 or 5. 8. Claims 1 or 2 or 3 or 4 or 8, wherein the first air conditioning zone is a computer room and the second air conditioning zone is an office adjacent thereto. The heat recovery system according to item 5.