JP2001056146A - Air conditioning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promise energy conservation and to facilitate maintenance and inspection works with a simple air conditioning apparatus by assuring a sufficient atmosphere introducing amount capable of preventing a deterioration of air quality of a each zone to be air conditioned even though a deviation of a load between the zones to be conditioned is large, regulating in a wide temperature and humidity ranges and further sufficiently humidifying cooling and fresh air cooling. SOLUTION: The air conditioning apparatus comprises an air conditioner 2A for return air to suck the air from a plurality of zones 1 to be air- conditioned and to heat or cool the air to a predetermined temperature, an air conditioner 2B for fresh air to suck fresh air and to heat or cool the air to a predetermined temperature, individual air supply ports 25 connected to the zones 1 through an air supply duct 26, and an air supply controller 3 for mixing the air from the conditioner 2A with the fresh air from the conditioner 2B to supply the air conditioned air from the port to the zones. Supply air amounts to the zones and a mixing ratio of the air from the conditioner 2A to the fresh air from the conditioner 2B are controlled at each zone 1 by the controller 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to an air conditioner in which return air and outside air from a zone to be air-conditioned are heated or cooled to a required temperature and sent to a plurality of zones to be air-conditioned. Related to the device.

[0002]

2. Description of the Related Art For example, in an air conditioner for supplying conditioned air to a plurality of rooms or a space to be partitioned in one room in an office building or the like, the conditioned air is sent to each of the conditioned zones. Depending on the method, there are a single duct variable air flow type and a pair duct type.

[0003] The single duct variable air flow system is shown in FIG.
As shown in FIG. 3, the return air and the outside air from the air-conditioned zone 51 are sucked into the air conditioner 52, and the air that has passed through the air filter 53 and the blower 54 is supplied to the hot water coil 55 and the cold water coil 5.
6. Heating or cooling to a predetermined temperature in step 6
Is transmitted from the server.

In the single duct variable air flow system, an air flow controller 59 provided in the ceiling of each air-conditioned zone by branching the other end of an air supply duct 58 having one end connected to the air supply port 57, 59, the air volume controller controls the amount of air blown to each air-conditioned zone according to the temperature of each air-conditioned zone, and the temperature of each air-conditioned zone is individually adjusted.

A pair duct type air conditioner is provided with a return air conditioner 62 and an outside air conditioner 63, for example, as shown in FIG. The air that has passed through the air filter 64 and the blower 65 is cooled by the cold water coil 66 and sent out from the cool air supply port 67 for return air. The other end of the duct 72, one end of which is connected to the cool air supply port 67 for return air, which has a configuration in which the air that has passed through the blower 69 is cooled by the cold water coil 70 and sent out from the cool air supply port 71 for outside air. The other end of the duct 73, one end of which is connected to the cool air supply port 71 for outside air, is branched and connected to the mixing box 74 provided in the ceiling of each zone to be air-conditioned. Outside air from the air and the outside air for the air conditioning apparatus 63 from 2 is mixed with the mixing box 74, it is sent to the each of the air conditioning zones corresponding respectively.

In the ぺ adduct type, an air volume controller 75 is provided between the branch of the duct 72 from the return air supply port 67 and the mixing box. Is a fixed amount, but the temperature of the air supplied to each air-conditioned zone is adjusted by adjusting the air from the return air conditioner 62 mixed with the outside air by the air volume controller 75.

[0007]

The air-conditioned air sent from the air conditioner to each of the zones to be air-conditioned does not merely adjust the temperature and humidity of the zones to be air-conditioned, but also takes in appropriate outside air to each zone to be air-conditioned. By sending the air, deterioration of air quality such as an increase in the concentration of carbon dioxide, a decrease in the concentration of oxygen, or retention of odor in the zone to be air-conditioned is prevented.

In the above-described conventional air conditioner of the single duct variable air flow system, after mixing outside air and return air, the air is adjusted to a required temperature and humidity and sent to the zone to be air-conditioned. It cannot be adjusted for each air-conditioned zone.

Therefore, in order to ensure the minimum amount of outside air introduced, the amount of air blown to each zone to be air-conditioned must be kept at a certain value or more, and this amount of air blows is 100 to 40 times the blowing capacity of the air conditioner. %, That is, the air volume cannot be set to 40% or less, and sufficient temperature control cannot be performed when the air-conditioned zone has a low load.

In the above-described conventional pair duct type air conditioner, a constant outside air introduction amount can be secured for each air-conditioned zone, but the outside air introduction amount is increased according to the deterioration of the air quality of each air-conditioned zone. I can't.

When the enthalpy of the outside air is lower than the enthalpy of the zone to be air-conditioned, energy can be saved by performing so-called outside air cooling, in which the outside air is sent to the zone to be air-conditioned to cool the zone to be air-conditioned. Can be done,
In the above-described pair duct system, since the amount of outside air introduced cannot be increased, outside air cooling cannot be performed.

Further, in the air conditioners of the single duct variable air volume type and the pair duct type, an air volume controller must be provided in the ceiling of the zone to be air-conditioned, and maintenance and inspection work of the air volume controller is difficult. In particular, in the case of a pair duct type air conditioner, the duct on the side of the air conditioner for return air and the duct on the side of the air conditioner for outside air have to be arranged from the air conditioner to the zone to be air conditioned, which causes a problem that equipment costs are required. .

[0013]

An object of the present invention is to secure a sufficient amount of outside air introduced to prevent deterioration of air quality in each zone to be air-conditioned even when the load deviation between the zones to be air-conditioned is large. It is possible to adjust the temperature and humidity over a wide range.
It is still another object of the present invention to provide an air conditioner that can sufficiently perform humidification cooling and outdoor air cooling, can save energy, and has a simple device and easy maintenance and inspection work.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, an air conditioner according to the present invention is provided with a return air conditioner for sucking return air from a plurality of air-conditioned zones and heating or cooling it to a predetermined temperature. An air conditioning unit for outside air that heats or cools to a predetermined temperature by sucking outside air, and an individual air supply port connected to each air-conditioned zone via an air supply duct, An air supply control unit that mixes air from the unit and outside air from the outside air conditioning unit and supplies air-conditioned air from the air supply port to each of the air-conditioned zones. The amount of air blown and the mixing ratio of the air from the air conditioning unit for return air and the outside air from the air conditioning unit for outside air are controlled for each zone to be air-conditioned.

More specifically, the air supply control unit controls the amount of air sent from the return air conditioning unit to each of the air-conditioned zones based on the air temperature in each of the air-conditioned zones. A return air flow controller, and an external air controllable for each air conditioned zone based on the external air cooling request and air quality in each air conditioned zone from the external air conditioning unit to each air conditioned zone. An air flow controller, wherein air from the return air flow controller and outside air from the outside air flow controller are mixed in air supply chambers corresponding to each air-conditioned zone, and the air-supply ports are connected to each air-conditioned zone. To be sent to the server.

Further, a specific configuration of the air conditioner according to the present invention is that a return air filter, a return air blower, and a return air conditioner are provided from a return air inlet for taking in return air from a plurality of air-conditioned zones. An air conditioning unit for return air provided in this order, an air filter for outside air from the outside air inlet that takes in outside air, a blower for outside air,
An air conditioner for outside air having an air conditioner for outside air in this order, air from the air conditioner for return air and outside air from the air conditioner for outside air are mixed at a required ratio for each zone to be air-conditioned, and from a plurality of air supply ports. An air supply control unit that individually sends out conditioned air to each air-conditioned zone is provided. The air supply control unit controls the amount of air sent from the return air-conditioning unit to each air-conditioned zone by the air in each air-conditioned zone. A return air volume controller that controls each air-conditioned zone based on the temperature, and an external air volume that is sent from the external air-conditioning unit to each air-conditioned zone based on the external air cooling request and air quality in each air-conditioned zone. An air flow controller for outside air controllable for each zone to be air-conditioned, and a mixture of air from the air flow controller for return air and outside air from the air flow controller for outside air, and from the air supply port to each air-conditioned zone. And an air supply chamber for delivering air to the Structure in which a total heat exchanger that exchanges heat between the outside air flowing through the air passage and the return air from the air-conditioned zone is provided in the outside air air flow path between the outside air air filter and the outside air blower of the air conditioning unit Shall be

Further, the air conditioner according to the present invention is provided with a humidifier in the return air conditioning unit, and when the inside of the zone to be air-conditioned is low in humidity and the inside of the zone to be air-conditioned needs to be cooled. Cooling of the air flowing through the air conditioning unit for return air is performed by the latent heat of evaporation of the humidifying water supplied to the humidifier, and the enthalpy of the outside air drawn into the air conditioning unit for outside air is set in the zone to be air-conditioned. When the enthalpy of the air inside is smaller than the enthalpy of the air and cooling in the air-conditioned zone is required, the external air cooling is performed by increasing the amount of outside air sent from the outdoor air-conditioning unit to the air-conditioned zone.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings. FIG.
FIG. 1 is a system diagram showing a configuration of an air conditioner according to the present invention, in which a return air conditioning unit 2A that adjusts the temperature and humidity of return air from the air-conditioned zones 1 and 1 and the outside air are taken in to adjust the temperature of the outside air An air conditioning unit for two systems of an outside air conditioning unit 2B to be adjusted;
An air supply control unit 3 mixes air from both air conditioning units at a required ratio for each zone to be air-conditioned and sends it out.

The return air conditioner 2A is provided with a return air filter 5, a return air blower 6, and a return air conditioner 7 in this order from the return air inlet 4, and the return air blower 6 is connected to the inverter INV _1. The rotation speed, that is, the amount of air to be blown is controlled by this.

A hot water coil 8, a cold water coil 9, and a vaporizing humidifier 10 are arranged in this order from the upstream side of the air in the return air conditioner 7, and the temperature of the return air conditioner 7 is A sensor _STR is provided, and provided on a hot water supply path to the hot water coil 8 based on the temperature detected by the sensor so that the temperature detected by the sensor STR is maintained at a preset temperature. The opening degree of the hot water control valve M _VH or the cold water control valve M _VC provided in the cold water supply path to the cold water coil 9 is controlled.

An exhaust passage 11 is branched from an air passage between the return air inlet 4 and the return air filter 5, and the exhaust passage includes an exhaust blower 12 and an exhaust damper 13 in this order. A part of the return air from the return air inlet 4 is discharged to the outside through the exhaust port 14.

[0022] The external air-conditioning unit 2B is ambient air for an air filter 16 from the outside air inlet 15 comprises outside air blower 17, the outside air-conditioning unit 18 in this order, the outside air blower 17 rpm i.e. feed by the inverter INV ₂ The air volume is controlled.

A hot water coil 19 and a cold water coil 20 are arranged in the outside air conditioner 18 in order from the upstream side of the air, and a temperature sensor _STO is provided at an outlet of the outside air air conditioner 18. The hot water control valve M _VH or the cold water coil provided in the hot water supply path to the hot water coil 19 based on the temperature detected by the sensor so that the temperature detected by the sensor is maintained at a preset temperature. opening of the cold water control valve M _VC provided cold water supply path to 20 are controlled.

The air flow path between the outside air air filter 16 and the outside air blower 17 in the outside air conditioner 2B, and the air between the return air filter 5 and the return air blower 6 in the return air conditioner 2A. The flow path is connected through an opening / closing damper 21. The opening / closing damper 21 is normally closed. However, when the air conditioning unit for outside air or the air conditioning unit for return air is required for failure, maintenance, or inspection, for example, The air is manually opened to introduce outside air to the return air conditioning unit 2A, or to introduce return air to the outside air conditioning unit 2B.

The air supply control unit 3 controls each air-conditioned zone 1,
1 is provided with return air flow controllers 22 and 22, outside air flow controllers 23 and 23, and air supply chambers 24 and 24, and the return air flow controller 22 supplies air from the return air conditioner 2A. The amount of air sent to the air chamber 24 is controlled, and the outside air amount controller 23 controls the amount of outside air sent from the outside air conditioning unit 2 </ b> B to the air supply chamber 24. Each air supply port 25 is connected to a corresponding air-conditioned zone by an air supply duct 26.

Although two air supply ducts 26 are connected to the leftmost air-conditioned zone in FIG. 1, one of the ducts is a spare, and for example, when the air-conditioned zone has a large capacity, it is usually used. Although a spare duct is not used, it is used when the load in the zone to be air-conditioned becomes large, and the temperature and humidity can be controlled by a sufficient air flow rate.

In each of the zones 1 to be air-conditioned, as shown in FIG.
_T1 and S _T2 , humidity sensors S _H1 and S _H2 for detecting humidity, and an air quality sensor S _Q for detecting air quality are provided.
According to the air condition in each air-conditioned zone detected by each sensor, the temperature, the humidity, and the ratio of the outside air of the supplied air-conditioned air can be controlled for each air-conditioned zone. _Q is constituted by a sensor such as a carbon dioxide concentration sensor, an oxygen concentration sensor or an odor sensor (a sensor for detecting the concentration of cigarette smoke or the concentration of a substance causing odor).

The temperature sensor _ST1 is a temperature controller C
The temperature controller is connected to _T and sends a control signal to the return air volume controller 22 and the outside air volume controller 23. Specifically, the temperature controller sets the temperature in the zone to be air-conditioned to a preset value. When the deviation from the temperature is large, the proportional control is performed so that both the opening degrees of the return air volume controller 22 and the outside air volume controller 23 are large. If the temperature deviation is small, the return air volume control is performed. Unit 22 and air volume controller for outside air 23
Are proportionally controlled so that both of the opening degrees are small. However, the outside air flow rate controller 23 is configured such that the minimum air flow value is set in advance and is not completely closed, and therefore, the outside air having the minimum air flow value or more is always supplied to the air-conditioned zone. Has become.

The return air flow controller 22 and the outside air flow controller 23 output respective air flow signals individually, and return air is supplied based on the air flow signals from the respective return air flow controllers 22. total return air air volume value is calculated by use airflow summer T _R, the inverter INV ₁ controls the rotational speed i.e. blowing amount of return air blower 6 on the basis of the total return air air volume value, also, the outside air for air volume the total outdoor air air volume value by the outside air for the air volume summer T _O based on the air amount signal from the controller 23 is calculated, the inverter INV ₂ on the basis of the total outdoor air air volume value is a rotational speed i.e. air volume of the outside air blower 17 Control.

Further, the total external air air volume value is sent to opening controller MD of the exhaust blower 12 and the exhaust damper 13, the exhaust gas line of the same air volume as the total external air airflow from the outside air for the air volume summer T _O And the pressure in the zone to be conditioned is kept constant.

The humidity sensor S _H1 is a humidity controller C
_H , and this humidity controller is
There as sending a control signal to the evaporative humidifier 10 of the return air for the air-conditioning unit 7 in A, more specifically, there as to control the opening and closing of the humidifying water supply control valve S _V to the vaporizing humidifier 10, Specifically, when the air humidity in the zone to be air-conditioned detected by the humidity sensor S _H1 becomes equal to or less than a predetermined value, humidifying water is supplied.

When the air in the zone to be air-conditioned has a low humidity and the zone needs to be cooled,
By performing humidifying cooling for humidifying and cooling the air flowing through the return air conditioner 7 by the latent heat of evaporation of the humidifying water in the humidifier, energy saving can be achieved by reducing cooling energy by the chilled water coil. It is.

The air quality sensor _SQ is connected to a central monitoring panel C _O, which is connected to the outside air volume controller 23 and the return air volume controller 22 and the outside air blower 17 and the return air blower 6. each inverter INV of the rotation speed control ₁ is connected to INV _2, specifically, the outside air for the air volume control according to the degree air quality is to the deterioration deterioration in the air conditioning zone is detected by the air quality sensor S _Q Control to make the opening of the air blower 23 large, control to make the opening of the return air flow controller 22 small, and also control the amount of air blown from each blower in accordance with the opening of each air flow controller. I do.

The central monitoring panel C_O Is the zone to be air-conditioned
Temperature sensor S inside_T2And humidity sensor S _H2And temperature for outside air
Degree sensor S_T3And humidity sensor S_H3Also connected to the front
Temperature sensor S in the air-conditioned zone_T2And humidity sensor S_H2To
From the detected temperature and humidity,
Enthalpy, and a temperature sensor S for outside air_T3And wet
Degree sensor S_H3From the temperature and humidity detected by
The enthalpy in these zones and the outdoor air
Enthalpy in the zone
If it is higher than that, normal cooling operation is performed. Also open air
Outside if enthalpy is lower than enthalpy in zone
Air cooling may be required, but in this case
The air volume controller 23 is controlled to increase the opening degree.
Then, the return air volume controller 22 is closed and the outside air is required as it is.
To the air-conditioned zone to cool the outside air and save energy
Can be achieved.

Next, the operation of the air conditioner configured as described above will be described. The air from the return air inlet 4 is subjected to dust removal by a return air filter 5, passed through a return air blower 6, heated by a hot water coil 8 of a return air conditioner 7, or cooled by a cold water coil 9, Accordingly, the air is humidified by the evaporative humidifier 10, controlled to a required air volume by the return air volume controller 22 of the air supply controller 3, sent to the air supply chamber 24, and mixed with the outside air from the outside air conditioner 2 B. The air is discharged from the air supply port 25 and sent to the air-conditioned zones 1 and 1 by the air supply duct 26. That is, the temperature supplied to each air-conditioned zone is adjusted by setting the mixing ratio of the outside air and the return air in the air supply chamber 24.

A part of the air flowing in from the return air inlet 4 passes through an exhaust damper 13 by an exhaust blower 12 and is
The opening degree of the exhaust damper 13 is controlled so that the amount of air discharged to the outside and discharged is the same as the amount of outside air introduced, that is, the total amount of outside air supplied to the air-conditioned zone from the outside air conditioning unit or 2B, The pressure in the zone to be conditioned is kept constant.

The outside air from the outside air inlet 15 is cleaned of dust and the like by an outside air air filter 16, heated by a hot water coil 19 of an outside air conditioner 18, or cooled by a cold water coil 20, and is supplied to the outside air control unit 3. The air is supplied to the air supply chamber 24 while being controlled to a required air volume by the air volume controller 23, mixed with the air from the return air conditioning unit 2 </ b> A and discharged from the air supply port 25. It is sent to 1,1.

When the outside air temperature is low such as in winter, a heat exchanger is provided between the chilled water coils 9 and 20 and the outside air in front of the outside air inlet 15 to raise the temperature of the outside air. In some cases, water cooled by outside air may be sent to the cold water coils 9 and 20 as cooling water.

If the enthalpy of the outside air is smaller than the enthalpy of the air in the zone to be air-conditioned and it is necessary to perform cooling in the zone to be air-conditioned, the central monitoring panel C _O
Is controlled so that the opening degree of the outside air flow controller 23 corresponding to the required air-conditioned zone is increased, the return air flow controller 22 is closed, and cooling by outside air is performed. Will be

Next, a specific structure in which the air conditioner having the above-described configuration is combined in a casing 27 will be described with reference to FIGS. The inside of the casing 27 is divided into a return air conditioner 2A and an outside air conditioner 2B by a vertical partition plate 28,
The opening / closing damper 21 is provided in a communication portion 28 a opened below the vertical partition plate 28.

The inside of the return air conditioner 2A is formed by a vertical partition plate 29 with a descending air flow path 30 on the return air inlet 4 side (right side in FIG. 3) and an ascending air flow on the return air conditioner 7 side (left side in FIG. 3). A lower opening 29a of the vertical partition plate 29,
Is provided with the air filter 5 for return air, and the ascending air flow path 31 is vertically divided by a horizontal partition plate 32, and an opening formed in the horizontal partition plate below the horizontal partition plate 32. A return air blower 6 attached to 32a and a motor 6a as a drive source of the blower are provided. Above the horizontal partition plate 32, a return air conditioner 7 is provided.

The descending air flow path 30 is partitioned by a partition wall 33, the lower end of which is provided with the exhaust blower 12, and the upper end of which has an exhaust port 14 opened in the casing 27.
Is formed, and an exhaust damper 13 is attached to the exhaust port 14.

The inside of the outside air conditioning unit 2B is formed by a vertical partition plate 34 with a descending air passage 35 on the side of the outside air inlet 15 (left side in FIG. 3) and an ascending air passage 3 on the side of the outside air air conditioner 18 (right side in FIG.
6 and a lower opening 3 of the vertical partition plate 34.
The outside air filter 16 is attached to 4a.
The ascending air flow path 36 is vertically divided by a horizontal partition plate 37, and the outside air blower 17 attached to an opening 37a formed in the horizontal partition plate is provided below the horizontal partition plate 37.
A motor 17a is provided as a drive source of the blower, and an air conditioner 18 for outside air is provided above the horizontal partition plate 37.

Although the casing 27 is separated from the outside air conditioner 2B on the front side of the casing above the outside air conditioner 18 in the casing 27, the return air conditioner 2B is separated from the outside air conditioner 2B.
A front side lateral air flow path 38 communicating with the ascending air flow path 31 of A is formed, and the rear side of the casing above the return air conditioner 7 is separated from the return air conditioner 2A. However, the ascending air flow path 36 of the outside air conditioning unit 2B
A rear-side lateral air flow passage 39 communicating with the air passage is formed.

The casing upper surface plate above the ascending air flow path 31 and the front side horizontal air flow path 38 is provided with return air vents 40, 40 side by side. Air flow controller 2 for return air to ventilation holes 40, 40
2 and 22, respectively, and the ascending air flow path 36 and the rear side air flow path 39
On the upper surface plate of the casing above the
1 and 41 are opened side by side, and each open air vent 4
The outside air flow rate controllers 23, 23 are attached to 1, 41, respectively.

The air supply chambers 24 are provided above the return air flow controllers 22 and the external air flow controllers 23 arranged in front and rear so as to communicate with these air flow controllers. , 24, each air-conditioned zone 1, 1
Air supply duct 25, to which the air supply port 25 is connected
Is open. In the drawing, reference numeral 12a denotes a motor as a driving source of the exhaust blower, and 42 denotes a drain pan.

In the air conditioner of the embodiment described above, the outside air from the outside air inlet 15 is kept at the same temperature as the outside air conditioner 18.
To the outside air flowing from the outside air inlet 15 and passing through the outside air air filter 16,
In some cases, heat is exchanged with the return air from No. 1 to save energy by effectively utilizing the cold heat of the return air. Specifically, as shown in FIG. A return air flow path 43 is formed separately from the return air conditioner 2A, and one air flow path of the total heat exchanger 44 is interposed in the middle thereof, and the other air flow path of the total heat exchanger 44 is provided. Is provided between the outside air filter 16 and the outside air blower 17, and an exhaust blower 45 is provided at the outer end of the return air passage 43.

A bypass air passage 46 is provided between the outside air air filter 16 and the outside air blower 17 so as to extend over the total heat exchanger 44, and an opening / closing damper 47 is provided in the middle of the bypass air passage. It is provided.

The opening / closing damper 47 is normally closed, but is opened when cooling the outside air to prevent the temperature of the outside air from rising due to heat exchange in the total heat exchanger 44. In this case, the exhaust blower 45 in the return air passage 43 is also stopped.

[0050]

According to the air conditioner of the present invention, the air conditioning unit for outside air is provided separately from the air conditioning unit for return air. The amount is controlled to be a larger ratio than the amount of air supplied from the return air conditioning unit, so that sufficient outside air can be always introduced, and air conditioning with a low air volume can be performed. Therefore, the blowing power at the time of low load can be saved.

Since the outside air conditioning unit is provided separately from the return air conditioning unit as described above, when cooling the air-conditioned zone, the enthalpy of the outside air is larger than that of the air in the zone to be air-conditioned. If it is small, cooling can be performed by introducing outside air from the outside air conditioning unit and sending the outside air amount according to the required cooling amount for each zone to be air-conditioned, thereby achieving energy saving.

Further, when the air in the zone to be air-conditioned has a low humidity and cooling in the zone is required, the humidification cooling is performed by the latent heat of evaporation of the humidification water in the humidifier. Energy can be reduced.

Further, since the air conditioner is provided with an air flow controller, there is no need to provide an air flow controller or a mixing box or the like in the ceiling of the zone to be air-conditioned as in the prior art, thus facilitating maintenance and inspection work. In addition, the number of air supply ducts can be significantly reduced as compared with a pair duct type air conditioner, and the equipment cost can be reduced.

Further, since a bypass damper is provided between the outside air conditioner and the return air conditioner, outside air is introduced into the return air conditioner by this bypass damper, and the return air is supplied to the outside air conditioner. Therefore, constant air conditioning can be performed without stopping air supply to the zone to be air-conditioned even in the case of failure or maintenance of the air-conditioning unit for either outside air or return air.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of an air conditioner according to the present invention.

FIG. 2 is a control system diagram of an embodiment of the air conditioner according to the present invention.

FIG. 3 is a vertical sectional front view showing the embodiment of the air conditioner according to the present invention.

FIG. 4 is a plan view showing an embodiment of the air conditioner according to the present invention.

FIG. 5 is a vertical sectional side view taken along line VV of FIG. 3;

FIG. 6 is a vertical sectional side view taken along the line VI-VI of FIG. 3;

FIG. 7 is a vertical sectional side view taken along the line VII-VII of FIG. 3;

FIG. 8 is a system diagram showing another embodiment of the air conditioner according to the present invention.

FIG. 9 is a system diagram showing an example of a conventional single-duct variable airflow type air conditioner.

FIG. 10 is a system diagram showing an example of a conventional pair duct type air conditioner.

[Explanation of symbols]

1 Air-conditioned zone 2A Return air conditioning unit 2
B Air conditioning unit for outside air 3 Supply control unit 4 Return air inlet 5 Air filter for return air 6 Air blower for return air 7 Air conditioner for return air 8 Hot water coil 9 Cold water coil 10 Vaporization humidifier 11 Exhaust flow path 12 Exhaust air blower DESCRIPTION OF SYMBOLS 13 Exhaust damper 14 Exhaust port 15 Outside air inlet 16 Outside air filter 17 Outside air blower 18 Outside air air conditioner 19 Hot water coil 20 Cold water coil 21 Opening / closing damper 22 Return air flow controller 23 External air flow controller 24 Air supply chamber Reference Signs List 25 air supply port 26 air supply duct 27 casing 28, 29 vertical partition plate 30 descending air flow path 31 ascending air flow path 32 horizontal partition plate 33 partition wall 34 vertical partition plate 35 descending air flow path 36 ascending air flow path 37 horizontal partition plate 38 Front side horizontal air flow path 39 Rear side horizontal air flow path 40 Return air vent 41 External air vent 42 Drain pan 43 Return air flow path 44 Total heat exchanger 45 Exhaust blower 46 Bypass air flow path 47 Opening / closing damper

Continued on the front page F term (reference) 3L053 BB01 BB03 BB05 BB06 BB10 3L060 AA02 AA03 CC02 CC07 CC13 CC19 DD05 EE23 EE24 EE25 EE27 EE32

Claims (6)

[Claims] 1. An air conditioning unit for returning air which inhales return air from a plurality of zones to be air-conditioned and heats or cools it to a predetermined temperature, and an air intake unit which draws in outside air and heats or cools it to a predetermined temperature. An air-conditioning unit, and an individual air supply port connected to each air-conditioned zone via an air supply duct, wherein the air from the air-conditioning unit for return air and the external air from the air-conditioning unit for outside air are mixed to supply the air. An air supply control unit that supplies air-conditioned air from the vent to each air-conditioned zone is provided.The air supply control unit supplies air to each air-conditioned zone, air from the return air-conditioning unit, and air from the outside air-conditioning unit. An air conditioner in which the mixing ratio with the outside air is controlled for each air-conditioned zone. 2. The air supply control unit controls the amount of air sent from the return air conditioning unit to each of the air-conditioned zones based on the air temperature in each of the air-conditioned zones. An air volume controller for outside air, and an air volume controller for outside air that can control the amount of outside air to be sent from the outside air conditioning unit to each zone to be air-conditioned based on the air quality in each zone to be air-conditioned, The air from the return air volume controller and the outside air from the outside air volume controller are mixed in an air supply chamber corresponding to each air-conditioned zone, and sent out from the air supply port to each air-conditioned zone. 2. The air conditioner according to 1. 3. A return air conditioning unit having a return air filter, a return air blower, and a return air conditioner in this order from a return air inlet for receiving return air from a plurality of air-conditioned zones, and outside air. From the outside air inlet, an outside air air filter, an outside air blower, an outside air air conditioner equipped with an outside air air conditioner in this order, and the air from the return air conditioning unit and the outside air from the outside air conditioning unit for each air-conditioned zone. An air supply control unit that mixes air at a required ratio and individually sends out conditioned air from a plurality of air supply ports to each air-conditioned zone is provided, and the air supply control unit transmits air from the return air-conditioning unit to each air-conditioned zone. A return air volume controller that controls the amount of air to be sent out for each air-conditioned zone based on the air temperature in each air-conditioned zone, and the amount of outside air that is sent from the outside air-conditioning unit to each air-conditioned zone. Each zone is controlled based on the air quality in the zone. A possible outside air flow controller, and an air supply chamber that mixes air from the return air flow controller and outside air from the outside air flow controller and sends the mixture from the air supply port to each air-conditioned zone. Air conditioner. 4. An air flow path between the outside air air filter and the outside air blower of the outside air conditioner, wherein heat exchange between outside air flowing through the air passage and return air from the zone to be air conditioned is performed. The air conditioner according to claim 3, further comprising a heat exchanger. 5. A humidifier is provided in said return air conditioning unit, and when the inside of the zone to be air-conditioned is low in humidity and the inside of the zone to be air-conditioned needs to be cooled, humidifying water supplied to the humidifier is provided. The air conditioner according to claim 1 or 3, wherein cooling of air flowing through the return air conditioning unit is performed by latent heat of evaporation. 6. An air conditioning system for an outside air, wherein the enthalpy of the outside air drawn into the outside air conditioning unit is smaller than the enthalpy of the air in the zone to be air conditioned and cooling in the zone to be air conditioned is required. The air conditioner according to claim 1 or 3, wherein the amount of outside air sent from the section to the zone to be air-conditioned is increased to perform outside air cooling.