JPH08166160A - Air conditioning system - Google Patents

Abstract

PURPOSE: To surely prevent tobacco smoke from flowing into zones other than smoking zones in the setting of at least one as smoking zone among a plurality of zones by controlling the amount of air blown so that the internal room pressure in the smoking zones is lower than that in the circum ference thereof. CONSTITUTION: A second zone 14b is set as smoking zone when demand amount of air for first to third zones 14a-14c are all 1,000. In this case, 800 in the amount of air obtained by subtracting 200 as specified amount of air from 1,000 in the demand amount of air is set as target amount of air to be supplied to the smoking zone 14b. At this point, the same amount of air is discharged from exhaust ports 34 associated with the blowing of air conditioned with an air supply fan 30. But in the second zone 14b, the internal room temperature becomes lower relatively than the internal room temperatures of te other zones 14a and 14c, hence causing a part of air in the zones 14a and 14c to flows into the smoking zone. In other, words, the tobacco smoke from the smoking zone is prevented from flowing into the other zones.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system, and more particularly to an air conditioning system for using, for example, at least one zone of a room having a plurality of individually air-conditioned zones as a smoking zone.

[0002]

2. Description of the Related Art In a conventional air conditioning system, a VAV (variable air volume) unit is attached in association with an air supply port provided in each of a plurality of zones, and based on a temperature deviation between a room temperature and a set temperature. Calculate the required air volume for each zone,
Each VAV unit is controlled so that the supply air amount becomes equal to the required air flow amount. And in the smoking zone,
A ventilation device and an air purifier were provided separately.

[0003]

In the prior art, since the amount of air supplied to each zone was controlled so as to be equal to the required air volume, the indoor pressure in the surrounding zones rather than the indoor pressure in the smoking zone. In some cases, there was a risk that cigarette smoke in the smoking zone would flow into zones other than the smoking zone. Also,
Since the ventilation device and the air purifier are separately provided, there is a problem that the smoking zone cannot be easily changed.

Therefore, a main object of the present invention is to prevent cigarette smoke from flowing into a zone other than the smoking zone, and the smoking zone can be easily changed.
It is to provide an air conditioning system.

[0005]

According to the present invention, there is provided an air conditioner for heating or cooling at least outside air to supply it to a room divided into a plurality of zones, and to detect the temperature of each of the plurality of zones. Temperature detecting means, a required temperature setting means for setting a required temperature for each of the plurality of zones, a plurality of temperature based on the temperature detected by the temperature detecting means and the required temperature set by the required temperature setting means. A required air volume calculation means for calculating a required air volume in each of the zones, a plurality of units provided in association with each of the plurality of zones and for supplying the air supply from the air conditioner to each of the plurality of zones. At least one of the plurality of zones, the plurality of exhaust means provided in association with each of the plurality of zones and configured to discharge the exhaust from each of the plurality of zones. Smoking zone setting means set as a smoking zone, and indoor pressure control for controlling the indoor pressure of the smoking zone set by the smoking zone setting means to be lower than the indoor pressure of the surrounding area according to the air volume calculated based on the required air volume An air conditioning system comprising means.

[0006]

When at least one of the plurality of zones is set as the smoking zone, the indoor pressure of the smoking zone is controlled in accordance with the air volume calculated based on the required air volume so that it becomes lower than the indoor pressure around the smoking zone. Therefore, the air around the smoking zone is allowed to flow into the smoking zone, and it is possible to prevent cigarette smoke from flowing out of the smoking zone to the surroundings. Further, since the indoor pressure of each zone can be changed by controlling the amount of air supplied to each zone or the amount of exhaust gas discharged from each zone, the smoking zone can be easily changed.

[0007]

According to the present invention, a smoking zone can be set using a conventional variable air volume air conditioning system, smoke in the smoking zone can be prevented from flowing into other zones, and the smoking zone can be easily changed. it can. The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, an air conditioning system 10 of this embodiment has three zones 14 in a room 12 to be conditioned.
(14a, 14b and 14c) is for simultaneously air-conditioning, and includes an air conditioner 18 controlled by the controller 16. However, it suffices that two or more zones 14 are provided, and the number thereof is not limited to the embodiment.

The air conditioner 18 includes a casing 20.
An air supply port 22 is formed on the upper surface of the casing 20, and an air intake port 24 is formed on the lower portion of the right side surface. In addition, the air filter 26 and the heat exchanger 28 are provided inside the casing 20.
And the air supply fan 30 is arranged in this order from the upstream side. On the other hand, in the room 12, the air supply port 32 is provided for each zone 14.
And an exhaust port 34 are formed, each air supply port 32 and the air supply port 22 of the air conditioner 18 communicate with each other through an air supply duct 36, and each exhaust port 34 and the air intake port of the air conditioner 18 are connected. 24 and an exhaust duct (not shown) are communicated with each other via a ceiling space (not shown). Also, the air intake 24 is
It communicates with an outside air duct (not shown) for taking in outside air. Further, the air supply duct 36 is provided with a VAV (variable air volume) unit 38 including a damper, a wind speed sensor and the like (not shown) in association with the air supply port 32 of each zone 14,
A room thermostat 40 provided in each zone 14 is connected to each VAV unit 38. The room thermostat 40 is provided with a temperature detector 41, a temperature setting device 42, a smoking zone setting switch 44, and the like. And each VA
The V unit 38 is connected to the controller 16 via the communication cable 46.

When a power switch (not shown) of the air conditioning system 10 is turned on, the air supply fan 30 is driven and cold water or hot water is supplied to the heat exchanger 28. When the required temperature is set by the temperature setting device 42 provided in each room thermo 40, the required air volume required in each zone 14 is calculated based on the temperature deviation between the room temperature and the required temperature detected by the temperature detector in the room thermo 40. Is required. When the smoking zone is not set, each required air volume is set as a target air supply amount, and the target air supply amount signal is given to the VAV unit 38, and therefore, the air supply supplied from each air supply port 32 to each zone 14. The air supply amount of each VAV unit 38 is controlled so that the amount becomes equal to each target air supply amount. On the other hand, when at least one of the plurality of zones 14 is set as the smoking zone by the smoking zone setting device 44, the air volume obtained by subtracting the first predetermined air volume from the required air volume required in the smoking zone is supplied to the smoking zone. Should be the target air supply amount,
The air volume obtained by adding the second predetermined air volume obtained based on the first predetermined air volume to the required air volume of each of the remaining zones excluding the smoking zone is the target air supply volume to be supplied to each of the remaining zones, The target air supply amount signal is given to the VAV unit 38, and thus each VAV is adjusted so that the air supply amount supplied from each air supply port 32 to each zone 14 becomes equal to the target air supply amount.
The unit 38 is controlled. As a method of obtaining the second predetermined air volume, for example, a method of proportionally dividing the first predetermined air volume by the ratio of the required air volume of the remaining zones excluding the smoking zone,
There are methods such as weighting the distance to the smoking zone.

For example, in the method of apportioning the first predetermined air volume, the first zone 14a, the second zone 14b, and the third zone 14a.
When all the required air volumes of the zones 14c are 1000, if the second zone 14b is set as a smoking zone,
An air volume 800 obtained by subtracting the first predetermined air volume 200 from the required air volume 1000 of the second zone 14b is set as the target air supply volume to be supplied to the smoking zone 14b, and the target air volume of 1000 in the first zone 14a and the third zone 14c The air volume 1100 obtained by adding the air volume 100 obtained by proportionally dividing the predetermined air volume 200 of 1 with the ratio of the required air volume is the first zone 14a and the third zone 1
It is set as a target air supply amount to be supplied to each of 4c. Since the same air volume 1000 is discharged from each exhaust port 34 by being sucked by the air supply fan 30, the indoor pressure of the second zone 14b becomes lower than the indoor pressure of the first zone 14a and the third zone 14c, Of the air in the first zone 14a and the third zone 14c, the air volume 100 is the second zone 14b.
That is, it flows into the smoking zone.

A part of the air discharged from each exhaust port 34 is sucked into the air supply fan 30, taken into the casing 20 through a space above the ceiling (not shown), and mixed with the outside air taken from outside. Then, after the mixture of the return air and the outside air is dust-removed through the air filter 26 and heated or cooled through the heat exchanger 28, the room 1 is returned again.
2 is supplied.

According to this embodiment, each zone 14a-1
By controlling the amount of air supplied to the 4c by the VAV unit 38, the indoor pressure in the smoking zone is made lower than the indoor pressure in the other zones, so that the cigarette smoke in the smoking zone is transferred to the other zones. It can be prevented from flowing. Also,
The smoking zone can be easily changed only by operating the smoking zone setting switch 44 of another room thermo 40. Further, it is possible to save the trouble of separately providing a ventilation device, an air purifier, and the like.

In the air conditioning system 50 of another embodiment shown in FIG. 2, the outside air outlet 5 is provided in the casing 20 of the air conditioner 18.
A return air port 54 is formed independently of 2, and a return air fan 55 is provided in association with the return air port 54. And return air port 5
4 and the exhaust port 34 provided in each zone 14 of the room 12 communicate with each other through the return air duct 56. Return air duct 56
Is provided with a VAV unit 58 including a damper (not shown), a wind speed sensor, etc., in association with each exhaust port 34.
Each VAV unit 58 is connected to the controller 16 together with each VAV unit 38 via the communication cable 46.

When a power switch (not shown) of the air conditioning system 50 is turned on, the air supply fan 30 and the return air fan 55 are driven, and cold water or hot water is caused to flow through the heat exchanger 28. When the required temperature is set by the temperature setter 42 provided in each room thermo 40, the required air volume of each zone 14 is obtained based on the temperature deviation between the room temperature and the set temperature detected by a temperature detector (not shown). Then, each VAV unit 38 is controlled so that the air supply amount supplied from the air supply port 32 of each zone 14 becomes equal to the required air volume. When the smoking zone is not set, the amount of air supplied from the air supply port 32 of each zone 14 and each zone 14
Each VAV unit 58 is controlled so that the exhaust amount discharged from the exhaust port 34 is equal. On the other hand, if the smoking zone is set by the smoking zone setting switch 44,
The air volume obtained by adding the third predetermined air volume to the required air volume of the smoking zone is set as the target exhaust volume, and the fourth predetermined air volume is obtained from the required air volume of each of the remaining zones excluding the smoking zone based on the third predetermined air volume. The air volume obtained by subtracting the air volume is set as the target exhaust volume to be discharged from each of the remaining zones, and each VA is adjusted so that the exhaust volume discharged from each exhaust port 34 becomes equal to the target exhaust volume.
The V unit 58 is controlled. As a method of obtaining the fourth predetermined air volume, for example, a method of apportioning the third predetermined air volume by the ratio of the required air volume of the remaining zones excluding the smoking zone, a method of distributing by weighting the distance to the smoking zone, and the like are available. is there.

For example, in the method of apportioning the third predetermined air volume, the first zone 14a, the second zone 14b and the third zone 14a
When all the required air volumes of the zones 14c are 1000, if the second zone 14b is set as a smoking zone,
An air volume 1500 obtained by adding the second predetermined air volume 500 to the required air volume 1000 of the second zone 14b is the target exhaust air volume to be discharged from the exhaust port 34, and is added from the required air volume 1000 of the first zone 14a and the third zone 14c. Air volume 500
The air volume 750 obtained by subtracting the air volume 250 proportionally divided by the ratio of the required air volume is set as the target exhaust volume to be discharged from each exhaust port 34 of the first zone 14a and the third zone 14c. Since the same air volume 1000 is supplied from each air supply port 32, the room pressure in the second zone 14b is equal to that in the first zone 14a and the third zone.
It becomes lower than the room pressure in zone 14c,
The air volume 250 of the air in a and the third zone 14c flows into the second zone 14b, that is, the smoking zone.

The air discharged from each exhaust port 34 is sucked by the return air fan 55 and taken into the casing 20 through the return air duct 56. Then, a part of the air taken in the casing 20 is discharged to the outside through the exhaust port 60, and the rest is mixed with the air taken in from the outside air port 52, and the air filter 26, the heat exchanger 28, the air supply fan 3 are provided.
It is again supplied into the room 12 through the 0 and the air supply duct 36. The mixing ratio of the return air and the outside air can be changed by the damper 62.

According to this embodiment, each zone 14a-1
The indoor pressure in the smoking zone is set to be lower than the indoor pressure in other zones by controlling the exhaust volume discharged from 4c by the VAV unit 58, so that the smoke of cigarettes in the smoking zone is transferred to other zones. It can be prevented from flowing out. In addition, smoking zone setting switch 4 of other room thermo 40
You can easily change the smoking zone just by operating 4.

In the air conditioning system 60 of another embodiment shown in FIG. 3, the indoor pressure in the smoking zone is made lower than the indoor pressure in the other zones by controlling the supply air amount by each VAV unit 38. Figure 1 Example and the displacement of each V
This is a combination with the embodiment of FIG. 2 in which the indoor pressure in the smoking zone is controlled to be lower than the indoor pressures in other zones by controlling with the AV unit 58.

In this embodiment, for example, when the required air volumes of the first zone 14a, the second zone 14b and the third zone 14c are all 1000, if the second zone 14b is set as a smoking zone,
The target air supply amount of b is set to 800, for example, and the first zone 1
4a and the target air supply amount of the third zone 14c are each 1
It is set to 100. Further, the target exhaust amount of the second zone 14b is set to 1200, and the target exhaust amount of the first zone 14a and the target exhaust amount of the third zone 14c are set to 900, respectively. Then, each VAV unit 3 is set so as to satisfy the target air supply amount and the target air exhaust amount of each zone 14a, 14b and 14c.
8 and each VAV unit 58 are controlled.

In this embodiment as well, the indoor pressure in the smoking zone can be made lower than the indoor pressures in the other zones. Therefore, as in the above-described embodiments (FIGS. 1 and 2), the smoke of cigarettes in the smoking zone is reduced. It can be prevented from flowing out to other zones. Further, simply by operating the smoking zone setting switch 44 of each room thermo 40, the air supply amount of each VAV unit 38 and each VA can be adjusted.
The smoking zone can be easily changed by changing the displacement of the V unit 58.

In each of the above-described embodiments, the smoking zone setting switch 44 is operated to set / cancel the smoking zone. However, a smoke detector is provided in place of the smoking zone setting switch 44. Therefore, the smoking zone may be automatically set / released. Alternatively, a timer may be provided in association with the smoking zone setting switch 44 to automatically cancel the smoking zone setting.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an illustrative view showing another embodiment of the present invention.

FIG. 3 is an illustrative view showing another embodiment of the present invention.

[Explanation of symbols]

 10, 50, 60 ... Air conditioning system 12 ... Room 14a, 14b, 14c ... Zone 16 ... Controller 18 ... Air conditioner 26 ... Air filter 28 ... Heat exchanger 30 ... Air supply fan 32 ... Air supply port 34 ... Exhaust port 38, 58 ... VAV unit 40 ... Room thermo 41 ... Temperature detector 42 ... Temperature setting device 44 ... Smoking zone setting switch

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Goro Ushiba 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation (72) Inventor Haruhiko Adachi 28 Kubotat Lane, Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Tochigi Plant Co., Ltd. (72) Inventor Shuzo Akita 28 Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Kubota Train Co., Ltd. Tochigi Plant (72) Inventor Yasunori Sueyoshi 1-1-1 Hama, Amagasaki City, Hyogo Kubota Technology Co., Ltd. Inside the Development Laboratory (72) Inventor Masahiko Nomura 1-1-1 Hama, Amagasaki City, Hyogo Prefecture Inside the Kuboyu Technology Development Laboratory

Claims (3)

[Claims] 1. An air conditioner for heating or cooling at least outside air to supply the air into a room divided into a plurality of zones, temperature detecting means for detecting a temperature of each of the plurality of zones, and a plurality of the air conditioners. Required temperature setting means for setting a required temperature for each of the zones, the plurality of zones based on the temperature detected by the temperature detecting means and the required temperature set by the required temperature setting means A required air flow rate calculation means for calculating a required air flow rate required for each of the plurality of zones, and for supplying the air supply from the air conditioner to each of the plurality of zones. A plurality of air supply means, a plurality of exhaust means provided in association with each of the plurality of zones and for discharging exhaust gas from each of the plurality of zones, Smoking zone setting means for setting at least one of them as a smoking zone, and the required air volume so that the indoor pressure of the smoking zone set by the smoking zone setting means is lower than the indoor pressure of its surroundings. An air conditioning system comprising an indoor pressure control means for controlling according to the air volume calculated based on the air pressure. 2. The indoor pressure control means calculates a target air supply volume to be supplied to the smoking zone by subtracting a first predetermined air volume from the required air volume of the smoking zone, and excludes the smoking zone. A target for calculating a target air supply amount to be supplied to each of the remaining zones by adding a second predetermined air amount obtained based on the first predetermined air amount to the required air amount of each of the remaining zones The air conditioning system according to claim 1, further comprising: an air supply amount calculation means; and an air supply amount control means for controlling an air supply amount of each of the plurality of air supply means according to an output of the target air supply amount calculation means. . 3. The indoor pressure control means calculates a target exhaust volume to be discharged from the smoking zone by adding a third predetermined air volume to the required air volume of the smoking zone, and excludes the smoking zone. A target exhaust amount for calculating a target exhaust amount to be discharged from each of the remaining zones by subtracting a fourth predetermined air amount obtained based on the third predetermined air amount from the required air amount of each of the remaining zones The air conditioning system according to claim 1 or 2, further comprising: a calculation unit, and an exhaust amount control unit that controls an exhaust amount of each of the plurality of exhaust units according to an output of the target exhaust amount calculation unit.