JP2980220B2 - Air conditioning system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system and, more particularly, to an air conditioning system for appropriately switching between a ceiling blowing operation and a floor blowing operation for air conditioning.

[0002]

2. Description of the Related Art An example of this type of conventional air conditioning system is disclosed in Japanese Patent Application Laid-Open No. 3-168439. In this prior art, a plurality of ceiling outlets are provided on a ceiling of a room to be air-conditioned, and a plurality of floor outlets are provided on a floor. The ceiling blowing operation is performed during cooling, and the floor blowing operation is performed during heating.

[0003]

In the above-mentioned prior art,
Cooling air is supplied from the ceiling outlet during cooling, and warm air is supplied from the floor outlet during heating, so there is an advantage that air conditioning can be performed efficiently, but the amount of air supplied from each ceiling outlet or There has been a problem that the amount of air supplied from the floor outlet cannot be individually controlled, and the deviation of the indoor temperature distribution cannot be eliminated.

[0004] Therefore, a main object of the present invention is to provide an air conditioning system that can realize a better air-conditioning environment.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an air conditioning system for air-conditioning a plurality of areas, comprising a ceiling outlet, a floor outlet, and a room thermostat provided in association with each of the plurality of areas. An air conditioner that heats or cools outside air and sends it out from an air supply port, a first duct that connects the air supply port and each of the ceiling outlets, and a second duct that communicates each of the air supply port and the floor outlet. A plurality of first VAV units provided in connection with each of the duct and the ceiling outlet and controlled based on a signal from the corresponding room thermometer; a plurality of first 2VAV unit controlled on the basis of the signals, damper means for selecting either pass supply air delivered from the air supply port to the or a second duct passes into the first duct And together when controlling the air conditioner
Equipped with a controller that controls the entire system.
A first VAV unit and a plurality of second VAV units;
One connects to the controller via the serial interface
This is an air conditioning system that is connected and connected to room thermo .

[0006]

During cooling, the first duct is selected by operating the damper means, and the supply air cooled to the required temperature by the air conditioner is supplied from each ceiling outlet to each area to be air-conditioned. The amount of air supplied from each ceiling outlet is
The first VAV unit adjusts the room temperature detected by the room thermostat to be a predetermined constant temperature. On the other hand, at the time of heating, the second duct is selected, and the supply air heated to the required temperature by the air conditioner is supplied from each floor outlet to each area to be air-conditioned. The amount of air supplied from each floor outlet is adjusted by the second VAV unit so that the room temperature detected by the room thermostat becomes a predetermined constant temperature.

[0007]

According to the present invention, the amount of air supplied from each ceiling outlet and the amount of air supplied from each floor outlet can be individually controlled, so that each area can be individually air-conditioned. A good air conditioning environment can be realized. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0008]

FIG. 1 shows an air conditioning system 1 according to this embodiment.
0 denotes a plurality (five in this embodiment) of rooms 12a in the building
To 12e at the same time, and includes an air conditioner 16 controlled by the controller 14. The air conditioner 16 includes a casing 18. Casing 18
The partition wall 20 is formed in the inside of the inside, and the total heat exchanger 22 is provided in the partition wall 20. Thereby the casing 18
, A first chamber 24, a second chamber 26, a third chamber 28, and a fourth chamber 30 are formed. In addition, the partition wall 20 has the first
Damper 32 that opens and closes the chamber 24 and the second chamber 26
Is provided.

A return air port 34 is formed on the right side surface of the first chamber 24. Inside the first chamber 24, an air filter 36, a temperature sensor 38, a humidity sensor 40, and a return air fan 42 are provided from the upstream side. They are arranged in order. An air supply port 44 is formed on the right side surface of the second chamber 26, and an air supply fan 46, a cooling coil 48, and a heating coil 5 are provided inside the second chamber 26 from the upstream side.
0, a humidifier 52 and a temperature sensor 54 are arranged in this order. An outside air port 56 and an exhaust port 58 are formed on the left side surfaces of the third chamber 28 and the fourth chamber 30, respectively, and a wind speed sensor 60 and an air filter 62 are arranged inside the third chamber 28.

The cooling coil 4 is provided outside the casing 18.
8 and electric valves 64 and 66 for operating the heating coil 50, an electromagnetic valve 68 for operating the humidifier 52, and inverters 70 and 72 for controlling the rotation speeds of the return air fan 42 and the air supply fan 46. Then, the humidity sensor 40, the temperature sensors 38 and 54, and the wind speed sensor 60
Are connected to an AI (analog input) terminal 74 of the controller 14, the inverters 70 and 72, the electric valves 64 and 66, and the damper 32 are connected to an AO (analog output) terminal 76, and the electromagnetic valve 68 is
It is connected to an O (digital output) terminal 80, and the inverters 70 and 72 are further connected to a DI (digital input) terminal 78.

On the other hand, each room 12a to 12e in the building has
A ceiling outlet 82 and a floor outlet 84 are formed. Then, each ceiling outlet 82 and the air supply port 44 and the return air port 34 of the air conditioner 16 are communicated via the first duct 86,
Each floor outlet 84 and the return air port 34 and the air supply port 44
It is communicated via a duct 88. Also, the first duct 86
And the second duct 88 has a return air port 3 of the air conditioner 16.
Dampers 90 and 92 are provided in connection with 4, and dampers 94 and 96 are provided in connection with air supply port 44. The dampers 90, 92, 94 and 96 are
Are connected to the DO terminal 80 of FIG. And the first duct 86
A plurality of VAV (variable air volume) damper units 102 including a damper 98 and a wind speed sensor 100 are provided in association with each ceiling outlet 82, and each VAV damper unit 1
02 is connected to a room thermo 104 provided in each of the rooms 12a to 12e. Each VAV damper unit 102
Is the SI of the controller 14 via the operation panel 106.
(Serial interface) Connected to terminal 108. On the other hand, a plurality of VAV (variable air volume) fan units 114 including a fan 110 and an inverter 112 are provided in the second duct 88 in association with each floor outlet 84. Each V
The AV fan unit 114 is an AO of the controller 14.
Connected to terminal 76.

In operation, when the cooling operation is selected by the operation panel 106, the electric valve 66 of the heating coil 50 is closed and the electric valve 64 of the cooling coil 48 is closed.
Is released. Further, the dampers 90 and 96 are closed, and the dampers 92 and 94 are opened. And
The return air fan 42 and the air supply fan 46 are driven at a predetermined rotation speed.

When the return air fan 42 and the supply air fan 46 are driven, the air (return air) in the chambers 12 a to 12 e flows from the floor outlets 84 through the second duct 88 to the air conditioner 16.
Is taken into the first chamber 24. The return air taken into the first chamber 24 is dust-removed through the air filter 36, a part of the air flows into the fourth chamber 30 through the total heat exchanger 22, and the rest flows into the second chamber 26 through the damper 32. I do. 4th
The return air flowing into the chamber 30 is discharged outside through the exhaust port 58. On the other hand, outside air from the outside is taken into the third chamber 28 through the outside air port 56, is dust-removed through the air filter 62, flows into the second chamber 26 through the total heat exchanger 22, and returns through the damper 32. Mixed with qi. At this time, the opening degree of the damper 32 is controlled so that the outside air amount measured by the wind speed sensor 60 becomes the necessary outside air amount.

The mixture (air supply) of the outside air and the return air is sufficiently mixed in the air supply fan 46, cooled to a constant temperature through the cooling coil 48, and air-conditioned from each ceiling outlet 82 through the first duct 86. To be supplied to each room. The amount of air supplied to each room is adjusted by each VAV damper unit 102 so that the room temperature detected by the room thermo 104 becomes a predetermined constant temperature. During the cooling operation, the operation of the VAV fan unit 114 is stopped.

On the other hand, when the heating operation is selected by the operation panel 106, the electric valve 64 of the cooling coil 48 is closed and the electric valve 66 of the heating coil 50 is opened, and the electromagnetic valve of the humidifier 52 is opened as required. 68 is released. The dampers 90 and 96 are opened, and the dampers 92 and 94 are closed. Further, a command by digital communication is received via the SI terminal 108 of the controller 14 and the damper 98 of the VAV
Is fully opened. Then, the return air fan 42 and the air supply fan 46 are driven at a predetermined rotation speed.

When the return air fan 42 and the supply air fan 46 are driven, the air (return air) in the chambers 12 a to 12 e flows from the ceiling outlets 82 through the first duct 86 to the air conditioner 1.
6 is taken into the first chamber 24. A part of the return air taken into the first chamber 24 is discharged outside through the exhaust port 58, and the rest is mixed with the outside air in the second chamber 26.
The mixture (air supply) of the outside air and the return air is sufficiently mixed in the air supply fan 46, heated to a certain temperature through the heating coil 50, humidified as needed through the humidifier 68, and Is supplied from the floor outlets 84 to the respective rooms to be air-conditioned. The amount of air supplied to each room is adjusted by each VAV fan unit 114 so that the room temperature detected by the room thermo 104 becomes a predetermined constant temperature. The information of the room thermo 104 is transmitted to the SI terminal 108 of the VAV damper unit 102 and the controller 14.
Is transmitted to the controller 14 by digital communication.

According to this embodiment, by operating the dampers 90 to 96, one of the ceiling blowing operation and the floor blowing operation can be selected in each of the chambers 12a to 12e. 10
Since the air supply amount can be adjusted for each room by 2 or 114, a favorable air-conditioning environment can be realized. In the above-described embodiment, a case has been described in which the plurality of chambers 12a to 12e are individually air-conditioned. However, the present invention can be applied to, for example, a case where a plurality of sections in one room are individually air-conditioned.

In the above-described embodiment, each ceiling outlet 8
2, a VAV damper unit 102 is provided, and a VAV fan unit 114 is provided in connection with each floor outlet 84. Contrary to this embodiment, a VAV fan unit 114 is provided in connection with each ceiling outlet 82. A VAV fan unit 114 is provided, and the VAV damper unit 1 is associated with each floor outlet 84.
02 may be provided. Further, either the VAV damper unit 102 or the VAV fan unit 114 may be provided in association with both the ceiling outlets 82 and the floor outlets 84.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air conditioning system 12a-12e ... Room 14 ... Controller 16 ... Air conditioner 32, 90-96 ... Damper 42 ... Return air fan 46 ... Supply air fan 48 ... Cooling coil 50 ... Heating coil 82 ... Ceiling outlet 84 ... Floor outlet 86 ... first duct 88 ... second duct 102 ... VAV damper unit 104 ... room thermo 114 ... VAV fan unit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshio Fukushima 2-10-26 Fujimi, Chiyoda-ku, Tokyo Inside Maeda Construction Industries Co., Ltd. (56) References JP-A-3-177740 (JP, A) JP-A-3-279726 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 3 / 00

Claims (1)

(57) [Claims] 1. An air conditioning system for air-conditioning a plurality of areas, comprising: a ceiling outlet, a floor outlet, and a room thermostat provided in association with each of the plurality of areas; An air conditioner that sends air from an air supply port, a first duct that communicates the air supply port with each of the ceiling outlets, and a second duct that communicates the air supply port with each of the floor outlets.
A plurality of first VAV units provided in association with each of the ceiling outlets and controlled based on a signal from the corresponding room thermometer; provided in association with each of the floor outlets damper means for selecting whether said plurality of first 2VAV unit controlled based on a signal from the room thermo, through the supply air delivered from said air inlet to said first or said second duct passes into the duct, And system for controlling the air conditioner
A plurality of first VAV units and a plurality of second VAV units;
One of the AV units is forwarded via the serial interface
Connected to the controller and the room thermostat
Connected to the air conditioning system.