JPS6280437A - Heat recovery system - Google Patents

Abstract

PURPOSE:To save energy required for heating, by operating a refrigerant cycle using a heat exchanger of an air conditioner for a first air-conditioning zone as an evaporator and a heat exchanger in an air conditioner for a second zone as a condenser. CONSTITUTION:Interior side air is drawn into an indoor unit 18b through an indoor air intake duct 26, cooled by the evaporation of refrigerant in a heat exchanger 18d functioning as an evaporator, and discharged through an indoor air duct 22 to the interior side, where refrigeration of said side is carried out. On the other hand, refrigerant having material energy recovered from the interior side enters a heat exchanger 16e acting as a condenser for an indoor unit 16b on the perimeter side through a duct 47 and a duct 54 to release heat by condensation. Aid drawn through an indoor air intake duct 24 to be discharged from an indoor air duct 20 is heated by said heat, whereby heating on the side of a perimeter in carried out.

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 ART Air conditioners for buildings having an indoor space 7 can be roughly divided into two types: a water-source heat pump system that uses water as a heat source, and an air-source heat pump system. All of these can be adopted as individual air conditioning systems.The water source heat pump system that has been commonly used in the past has had problems with water leakage and water quality control. An air source heat pump system was developed. However, as shown in Japanese Patent Publication No. 56-16344, with the air source heat pump system, although each room could be air-conditioned individually,
No reasonable exchange of heat, i.e. heat recovery 7, could be carried out between the air conditioning zone, for example the verimator zone, and the first air conditioning zone, for example the interior zone. The present invention deals with simultaneous demands for heating and cooling that occur in the second air conditioning zone and the first air conditioning zone indoors. The heat can be quickly recovered and used for heating the second air conditioning zone, and the heat in the first air conditioning zone can be quickly released into the outside air in the summer.

Means to Solve the Problem Today, various types of OA equipment are being introduced into companies, offices, and the like. 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.

For this reason, even in winter when heating is required in the second air-conditioned zone, such as the perimeter zone, in such an office or the like, the first air-conditioned zone always requires cooling. This also applies when the first air conditioning zone is a studio or a computer room, and the second air conditioning zone is an office near the studio or computer room. Therefore, the present invention provides a first air conditioning zone that generates cooling load even in winter, and a second air conditioning zone that can use the heat recovered in this first air conditioning zone for heating and that is reachable by refrigerant piping. Refrigerant-type air conditioners are installed individually, and heat can be transferred to and from the air conditioners via refrigerant pipes and ducts as necessary.

Operation 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 unit heat exchanger in the second air-conditioning zone, especially in winter. This is used to heat the second air conditioning zone,
This is intended to save heating energy.

Embodiments In the following embodiments, the interior zone 7 is used as the first air-conditioning zone, that is, the place where the cooling load is generated even in winter.
, and a second air conditioning zone, that is, a location where the heat recovered in the first air conditioning zone can be used for heating and where the refrigerant piping can reach (approximately 1
The perimeter zone will be described as an example.

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, it is necessary to provide heating to the perimeter zone]0.

Air conditioners using refrigerants 16 and 18 are installed in the ceiling above the perimeter zone IO and the interior zone 12, respectively.
is installed. These air conditioners 16, 18 are known per se and are composed of outdoor units J, 6d, 18a and indoor units 16b, 18b.The indoor units 16A, 18h are indoor ventilation ducts 2o, respectively.

22 and interior air intake ducts 24,26 communicate with the perimeter zone 10 and the interior zone 12.

In addition, the outdoor units 16a and 18a are connected to exhaust ducts 1-28°3, respectively.
0 and the air supply duct) 32, 34 are both connected to the outdoors.

The outdoor unit 161Z of the perimeter air conditioner 16 is provided with one heat exchanger 16C. The indoor unit 16b is provided with two heat exchangers 16d and 16e.

On the other hand, the outdoor unit 18fZ and the indoor unit 18A of the interior air conditioner 18 are each provided with one heat exchanger 18c, 18d. Each heat exchanger is filled with refrigerant.

The heat exchanger 16o of the verimeter side outdoor unit and one heat exchanger 16d of the perimeter side indoor unit each have a conduit 38 having a compressor 36 and a capillary tube 40 in the middle.
．． They are connected to each other by 42.

The heat exchanger 18c of the interior-side outdoor unit and the heat exchanger 18d of the interior-side indoor unit similarly have a compressor 44 in the middle.
Conduits 46, 47 and capillary tubes 48
They are connected to each other by conduits 50, 51 with etc.

In addition, conduits 52 and 54 exiting from the second heat exchanger 16e in the perimeter indoor unit 166 connect the conduits 52 and 54 connecting the interior heat exchangers 18C and 918d, respectively.
, 51, 46.47. Therefore, the refrigerant from the heat exchanger 18d of the indoor unit on the interior side can flow through 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, and can also flow through the conduit 54. It can also flow into the second heat exchanger 10e of the indoor unit on the perimeter side. Similarly, the heat exchanger 18 of the indoor unit on the interior side
dK indicates that the refrigerant is the heat exchanger 18C of the interior side outdoor unit.
The conduit 50 passes through the conduit 51 through the capillary tube 48, and the conduit 52 passes through the second heat exchanger 16e of the indoor unit on the Verimeter side.
8, etc., and can be circulated through conduit 51.

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

The winter operation shown in FIG. 1 is performed when the interior load and the perimeter load are balanced. ). The perimeter zone thermostat 56 communicates only with the heat exchanger 18d of the interior indoor unit and the second heat exchanger 16e of the perimeter indoor unit.

In Figure 1, it is necessary to heat the verimeter side and cool the interior side. For this purpose, the second heat exchanger 161 of the indoor unit on the side meter side may be operated as a condenser, and the heat exchanger 18d of the indoor unit on the interior side, which communicates with the heat exchanger 16e, may be operated as an evaporator.

Other heat exchangers 161? , 16d, and 18C are inactive. The air on the interior side is routed to the indoor air intake duct 2.
The air enters the indoor unit 11 through the indoor unit 11, is cooled by the evaporation action of the refrigerant in the heat exchanger 18d, which acts as an evaporator, and is discharged from the indoor ventilation duct) 22f/I: to the interior side. The area will be cooled.

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 enters the room from the indoor air intake duct 24 on the perimeter side (indoor ventilation duct) 20
The air exiting from the perimeter is heated and this
Side heating is performed. The condensed liquid refrigerant enters the cavity refrigerant 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.

Heating in perimeter zone 10 is heating in interior zone 12
If the heat from the zone is balanced, that is, both zones 10.1
Although FIG. 1 shows the case where the heat loads of the two zones are balanced with each other, FIG. 3 shows the operating state when the heating load of the perimeter zone 10 is large. In this case, the first
The difference from the diagram is that the outdoor unit 1 in the perimeter zone 10
6a heat exchanger 16C and indoor unit 16A heat exchanger 16d
and is operating. That is, the perimeter
To cover the heating load of zone 10, the perimeter
The heat exchanger 16d of the indoor unit 165 in zone 10 operates as a condenser, and the heat exchanger 16C of the outdoor unit 16a operates as an evaporator. With this operation, the perimeter zone 10 is heated by the action of the two heat exchangers 16d and 16g, and the intended purpose can be achieved.

FIG. 2 shows the operating state when the heating load on the bell meter zone 10 is small. In this case, the difference from Fig. 1 is that the interior zone 120 and the outdoor unit heat exchanger 18C
'Y are operating 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 similarly to the indoor unit heat exchanger 1611 in the perimeter zone. Due to this operation, the refrigerant is liquefied in two heat exchangers 164! , 18C, and as a result, when the heating load in the perimeter zone becomes smaller, the heat that must be radiated is processed by the heat exchanger 18C and sent to the outdoors from the outdoor unit exhaust duct 30 of the interior zone 12. It releases heat.

In this way, the air conditioning of the perimeter zone 10 is
Of course, if necessary, the perimeter zone 10 can also be used to heat both the perimeter zone 10 and the interior zone 12.
The indoor heat exchanger 16d of the interior zone 12 and the indoor heat exchanger 18d of the interior zone 12 are used as condensers, and the perimeter
The indoor heat exchanger 16C of the zone 10 and the outdoor heat exchanger 18C of the interior sea 712 can also function as an evaporator.

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 bell meter zone and the interior zone. For this purpose, the heat exchanger 18d of the interior indoor unit is controlled by a dedicated thermostat (not shown).
It is operated in combination with the heat exchanger 18C of the interior side outdoor unit, and the first heat exchanger 16d of the verimeter side indoor unit and the heat exchanger 16 of the perimeter side outdoor unit (?Which combination is operated? At this time, the second heat exchanger 16e of the indoor unit on the perimeter side is inactive.However, the heat exchanger 18d of the indoor unit on the interior side and the perimeter side,
16d'& evaporator, and outdoor unit heat exchanger 18C5
16C acts as a condenser.

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 respectively transferred to the indoor air intake ducts 1-26, 24'! a = via indoor unit 18
b, sucked into 16h. This air is now cooled by the heat exchangers 18d, 16d, which now act as evaporators, and is also blown into the interior zone 12 and the perimeter zone 10 by indoor ventilation ducts 22, 20, respectively, to cool these zones.

On the other hand, the refrigerant containing the indoor thermal energy is used in the outdoor unit 1.
Heat exchanger 1 now acting as a condenser in 6a, 18a
It enters 6C and 18C, where it releases its heat. The heat released here enters the outdoor units 16a, 18a through the air supply ducts 32, 347, respectively, and is exhausted to the outdoors through the exhaust ducts 28, 30&.

In this way, in the present invention, during winter operation, the heat recovered in the interior zone is not discharged to the air (
, the heating energy of the perimeter zone can be significantly saved by discharging it into the perimeter zone. 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 especially advantageous when used in large-scale buildings, and has the advantage of making it easier to design a heat recovery system for individual air conditioning systems.

In the above embodiment, one air conditioner was installed in the ceiling on the perimeter meter side and one in the ceiling on the interior side, but of course, more air conditioners could be used at the same time, or in the ceiling on the perimeter side.
It is also possible to install all air conditioners within the side ceiling,
Furthermore, a separate type air conditioner can also be used.

In addition to the interior zone, the first air-conditioning zone includes studios, computer rooms, and other areas that generate cooling loads even in winter, and the second air-conditioning zone includes air-conditioning zones other than the belt meter zone, where air-conditioning is collected in the first air-conditioning zone. There are offices and other areas in close proximity to studios and computer rooms that can be used for heating and have flexible refrigerant piping.

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 12: Interior zone 14
; Inside the ceiling 16, 18: Air conditioners 16a, 18 (Z
: Outdoor unit 16h, 18/l : Indoor unit 20.22 : Indoor ventilation duct 24.26 : Indoor air intake duct 28.30 : Exhaust duct 32, 34 : Air supply duct 3
6.44: Compressor 4CJ, 48: Capillary tube 56: Verimeter zone thermostat Patent applicant
Shinryo Corporation (5 people)

Claims (8)

[Claims] (1) A heat recovery system using a refrigerant as a heat recovery means, which recovers heat obtained during cooling load processing in the first air conditioning zone 12 and uses this heat for heating load processing in the second air conditioning zone 10. A heat exchanger 16e housed in the indoor unit 16b of the second air conditioning zone air conditioner 16 is directly connected to a heat exchanger 18d housed in the indoor unit 18b of the first air conditioning zone air conditioner 18, Heat recovery characterized by operating a refrigerant cycle using the heat exchanger 16e in the second zone air conditioner 16 as a condenser and the heat exchanger 18d of the first air conditioning zone air conditioner 18 as an evaporator. system. (2) The heat exchanger 18c housed in the outdoor unit 18a of the first air conditioning zone air conditioner 18 is replaced with the heat exchanger 16e housed in the indoor unit 16b of the second air conditioning zone air conditioner 16. and the indoor unit 1 of the first air conditioning zone air conditioner 18
The heat exchanger 18d housed in the air conditioner 8b is directly connected to the second air conditioning zone air conditioner 16 heat exchanger 16e and the first air conditioning zone air conditioner 18 heat exchanger 18c as a condenser. 2. The heat recovery system according to claim 1, wherein the heat exchanger 18d of the first air conditioning zone air conditioner 18 is used as an evaporator to operate the refrigerant cycle. (3) The outdoor unit 16a of the second air conditioning zone air conditioner 16, which communicates with the outside air via the air supply duct 32 and the exhaust duct 28, has one heat exchanger 16c, and the indoor air blower duct 20 and Indoor unit 1 of second air conditioning zone air conditioner 16 communicating with the second air conditioning zone via indoor air intake duct 24
6b has two heat exchangers 16d and 16e, and the outdoor unit 18a of the first air conditioning zone air conditioner 18, which communicates with the outside air via the air supply duct 34 and the exhaust duct 30, has one heat exchanger. The indoor unit 18b of the first air conditioning zone air conditioner 18, which has a heat exchanger 18c and communicates with the first air conditioning zone via the indoor ventilation duct 22 and the indoor air intake duct 26, has one heat exchanger 18d. and an air conditioner 16 for the second air conditioning zone.
The outdoor unit heat exchanger 16c is the air conditioner 1 for the second air conditioning zone.
The first heat exchanger 16d of the indoor unit 16b of No. 6 is connected to the
The outdoor unit heat exchanger 18c of the air conditioning zone air conditioner 18 is connected to the indoor unit heat exchanger 18d of the first air conditioning zone air conditioner 18, and the outdoor unit 16b of the second air conditioning zone air conditioner 16 is connected to the indoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18. The second heat exchanger 16e is also connected to the outdoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18, and is connected to the outdoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18.
The refrigerant that has passed through d is transferred to the second air conditioning zone air conditioner 16.
A second heat exchanger for sending the required amount corresponding to the heat load amount to either one or both of the indoor unit second heat exchanger 16e of the first air conditioning zone air conditioner 18 and the outdoor unit heat exchanger 18c of the first air conditioning zone air conditioner 18.
Control means 5 controlled by the air conditioning zone thermostat of
6, and during heat recovery, the control means 56 controls the first
The heat exchanger 18d of the indoor unit for the air conditioning zone is connected to the second heat exchanger 16e or 16e and 18c of the indoor unit for the second air conditioning zone, and when non-heat recovery is performed, the control means 56 connects the heat exchanger 18d of the indoor unit for the first air conditioning zone. The heat recovery system according to claim 2, wherein the heat exchanger 18d of the indoor unit is connected to the heat exchanger 18c of the outdoor unit for the first air conditioning zone. (4) Indoor air intake duct 2 in the second air conditioning zone air conditioner
4 first passes through 16e, then 16d, and is blown into the room via the air supply duct 20, thereby making it possible to preferentially utilize the recovered heat to the maximum extent. Heat recovery system. (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) Claim 1 or 2 or 3 or 4 characterized in that the first air conditioning zone is an interior zone and the second air conditioning zone is a perimeter zone.
The heat recovery system according to item 1 or 5. (7) Claims 1 or 2 or 3 or 4, characterized in that the first air conditioning zone is a studio and the second air conditioning zone is an office adjacent thereto. Or the heat recovery system according to item 5. (8) Claims 1 or 2 or 3 or 4, characterized in that the first air conditioning zone is a computer room and the second air conditioning zone is an office adjacent thereto. or fifth
Heat recovery system as described in section.