JP3052981B2 - 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 simultaneously air conditioning a plurality of rooms in a house and using a VAV (variable air volume) unit.

[0002]

2. Description of the Related Art In this type of conventional air conditioning system,
By distributing at least the outside air heated or cooled to a certain temperature by the air conditioner through the air supply duct to each of the plurality of rooms, and adjusting the air supply amount with a VAV unit provided in association with each room, The temperature was controlled individually for each room. And the air supply capacity of the air conditioner was set equal to the sum of the maximum air supply required in each room.

[0003]

In the conventional air conditioning system, the air supply capacity of the air conditioner is set equal to the sum of the maximum air supply required in each room. Are rarely used at the same time,
The performance of the air conditioner was excessive. Therefore, there has been a problem that the air conditioner is increased by an amount corresponding to the excessive capacity and the cost is high.

[0004] Therefore, a main object of the present invention is to provide an air conditioner that can reduce the size of an air conditioner and reduce the cost.

[0005]

SUMMARY OF THE INVENTION The present invention provides an air conditioner that heats or cools at least outside air and supplies it to each of a plurality of rooms, room thermo means provided in each of the plurality of rooms, and a plurality of rooms. Provided in connection with each of the
And a plurality of VAVs for individually controlling the amount of air supplied to each of the plurality of rooms in response to a signal from the room thermo means.
A required maximum air supply is set for each of a plurality of rooms, and when the sum of the required maximum air supply exceeds the air supply capacity of the air conditioner, the air supply capacity is reduced to the required maximum air supply. This is an air-conditioning system in which the amount of air supplied proportionally according to the ratio is the maximum amount of air supplied to each room.

[0006]

The air supply capacity of the air conditioner is made smaller than the sum of the maximum (basic maximum air supply) of the required maximum air supply set for each room according to the operation mode. When the sum of the required maximum air supply required in each room exceeds the air supply capacity of the air conditioner, the air supply that is proportionally divided by the required maximum air supply ratio is the maximum air supply in each room. Quantity. At this time, if the priority switch means is operated, the air supply of the air conditioner is controlled so that the air supply amount to the priority room becomes equal to the required maximum air supply amount and the temperature of the priority room becomes a predetermined constant temperature. Temperature is controlled. At this time, in the rooms other than the priority room, the air supply amount obtained by proportionally dividing the remaining air supply capacity of the air conditioner by the ratio of the required maximum air supply amount is set as the maximum air supply amount, and the air supply amount is controlled by the VAV unit. Temperature control.

[0007]

According to the present invention, since the air supply capacity of the air conditioner is made smaller than the sum of the basic maximum air supply amounts of the respective rooms, the air conditioner can be downsized and the cost can be reduced. . 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 indicates a plurality of (five in this embodiment) rooms 12 in the house.
a to 12e are simultaneously air-conditioned, and include an air conditioner 16 controlled by the controller 14.
The air conditioner 16 includes a casing 18 and the casing 1
8, a partition wall 20 is formed, and the partition wall 20 is provided with a total heat exchanger 22. Thereby, the first chamber 24, the second chamber 26, and the third chamber 28 are provided inside the casing 18.
And a fourth chamber 30 is formed. Further, a damper 32 for opening and closing communication between the first chamber 24 and the second chamber 26 so as to be openable and closable with the partition wall 20, a return air fan 34 and an air supply fan 36, which will be described later.
And a motor 38 for simultaneously driving
Is provided with an inverter 40 for controlling the number of rotations.

A return air port 42 is formed on the right side of the first chamber 24. Inside the first chamber 24, an air filter 44, a temperature sensor 46, a humidity sensor 48, and a return air fan 34 are provided from the upstream side. They are arranged in order. An air supply port 50 is formed on the right side surface of the second chamber 26, and an air supply fan 36, a cooling coil 52, a heating coil 54, and a humidifier 5 are provided inside the second chamber 26.
6 and the temperature sensor 58 are arranged in this order from the upstream side. An outside air port 60 and an exhaust port 62 are formed on the left side surfaces of the third chamber 28 and the fourth chamber 30, respectively.
Inside the chamber 28, a wind speed sensor 64 and an air filter 66 are arranged.

On the other hand, electric valves 66 and 68 for operating the cooling coil 52 and the heating coil 54, an electromagnetic valve 70 for operating the humidifier 56, and the like are provided outside the casing 18. The temperature sensors 46 and 58, the humidity sensor 48, and the wind speed sensor 64 are connected to an AI (analog input) terminal 72 of the controller 14, and the electric valves 66 and 68, the damper 32, and the inverter 40 are connected to an AO (analog output). Terminal 74
, The inverter 40 is further connected to a DI (digital input) terminal 76, and the electromagnetic valve 70 is connected to
(Digital output) terminal 78.

On the other hand, in each of the rooms 12a to 12e in the house, an air supply port 80 and a return air port 82 are formed.
0 and the air supply port 50 of the air conditioner 16 are communicated via an air supply duct 84, and the return air port 82 and the return air port 42 of the air conditioner 16 are communicated via a space above the ceiling (not shown) or the like. You.
The air supply duct 84 includes a VAV including a damper 86 and a wind speed sensor 88 in relation to each of the rooms 12a to 12e.
A (variable air volume) unit 90 is provided, and a room thermo 92 provided in each of the rooms 12a to 12e is connected to the VAV unit 90.

A room which may be selected as a priority room is provided with a room thermostat 92a for a priority room as shown in FIG. 2, and the other rooms are provided with room thermostats for a general room as shown in FIG. 92b are provided. A start switch 94, a temperature setting switch 96, a temperature display section 98, and the like are provided in the room thermostat 92b for the general room, and a priority switch 100 for executing the priority operation is further provided in the room thermostat 92a for the priority room. Can be In addition, the room thermo 92a for priority rooms is provided in all the rooms 12a to 12e,
Any one of all the rooms 12a to 12e may be selected as a priority room. When the room thermostat 92a for the priority room is provided in a plurality of rooms, the room in which the priority switch 100 is operated last becomes the priority room.

Each VAV unit 90 is connected to an SI (serial interface) terminal 104 of the controller 14 via an operation panel 102. Operation panel 10
2, a power switch 106, a mode changeover switch 108, a good-night operation (operation during night sleep) changeover switch 110, a time setting switch 112, a display unit 114, and the like are provided as shown in FIG. The controller 14
An MPU (microprocessor unit) (not shown) for performing various controls is included. A ROM (not shown) is connected to the MPU, and the ROM corresponds to a basic maximum supply amount, a basic outside air amount, and a mode for each of the rooms 12a to 12e. Data such as a required maximum supply amount and a required outside air amount is stored. Note that the basic maximum supply amount and the basic outside air amount of the priority room are set to be larger than those of the other rooms.

In operation, when the power switch 106 is turned on, an air volume setting operation as shown in the flowchart of FIG. 5 is executed. That is, first, in step S1, it is determined whether or not the operation is a night sleep. If "YES" is determined in step S1, the required maximum supply air amount SAi and the required outside air amount Oi of each room to be air-conditioned in step S3.
After Ai is set to 60% of the basic maximum supply amount SAoi and the basic outside air amount OAoi, respectively, the process proceeds to step S5. If “NO” is determined, the process directly proceeds to step S5. In step S5, it is determined whether or not the priority switch 100 (FIG. 2) is operated, and if "NO" is determined, the required maximum supply air amount SAi and the required outside air amount OAi of the priority room are respectively set to the basic maximum in step S7. Air supply amount SAo
i and 50% of the basic outside air amount OAoi,
The process proceeds to step S9, and if "YES" is determined, the process directly proceeds to step S9. In step S9, the required maximum supply air amount SAi of the room where the VAV unit 90 is operated
And the sum ΣOA of the required outside air amount OAi. In step S11, it is determined whether or not ΣSA obtained in step S9 is greater than the maximum air supply capacity ΣSAo of the air conditioner 16, and if “NO” is determined, the maximum air supply amount SAsi is requested in step S13. After it is made equal to the maximum supply amount SAi, the process proceeds to step S15, and if “YES” is determined, the process proceeds to step S17.

In step S17, priority switch 100
It is determined whether or not is operated, and if "NO" is determined, the maximum air supply amount SAi of each room is determined by the air supply capacity ΣSAo of the air conditioner 16 to the required maximum air amount SAi of each room in step S19. After the air supply amount is made equal to the proportioned air supply amount, the process proceeds to step S15. If “YES” is determined in the step S17, the maximum supply amount SAsi of the priority room is changed to the required maximum supply amount Ssi of the priority room in step S21.
Ai (= α), the maximum air supply amount SA in other rooms
si is equal to the air supply amount obtained by proportionally dividing the remaining air supply capacity ΣSAo-α of the air conditioner 16 by the ratio of the required maximum air supply amount SAi. In step S15, it is determined whether or not ΣOA obtained in step S9 is larger than the outside air intake capacity ΣOAo of the air conditioner 16, and if “YES” is determined, the set outside air of the air conditioner 16 is determined in step S23. Quantity
OAs is equal to the outside air intake capacity ΣOAo, "NO"
Is determined in step S25, the air conditioner 16
Is set equal to ΣOA.

After the maximum air supply amount and the outside air amount of each room are set in this manner, the air conditioner 16 and the VAV according to the operation mode selected by the operation panel 102.
The unit 90 is operated. For example, when the heating operation is selected by the operation panel 102, the electric valve 66 of the cooling coil 52 is closed, and the electric valve 68 of the heating coil 54 is opened. Also, if necessary, the humidifier 56
Of the electromagnetic valve 70 is opened. And return air fan 3
4 and the air supply fan 36 are driven at a predetermined rotation speed.

When the return air fan 34 and the supply air fan 36 are driven, the return air discharged from each of the return air ports 82 of the rooms 12a to 12e passes through the return air port 42 into the first chamber 24 of the air conditioner 16. Is taken into. The return air taken into the first chamber 24 is dust-removed through the air filter 44, a part is taken into the fourth chamber 30 through the total heat exchanger 22, and the rest is taken into the second chamber 26 through the damper 32. It is.
The return air taken into the fourth chamber 30 is discharged outside through the exhaust port 62. In addition, the outside air from the outside
0 and is taken into the third chamber 28. After the outside air taken into the third chamber 28 is dust-removed by the air filter 66, the outside air is taken into the second chamber 26 through the total heat exchanger 22 and mixed with the return air taken through the damper 32. Here, the opening degree of the damper 32 is determined by the fact that the outside air amount measured by the wind speed sensor 64 is equal to the set outside air amount of the air conditioner 16.
It is controlled to be equal to OAs. Air supply fan 36
The mixture of the outside air and the return air sufficiently mixed by the air is heated through the heating coil 54 and humidified as necessary through the humidifier 56, and then supplied from the air supply port 50 to the air supply duct 84.
Is supplied to each of the rooms 12a to 12e.

When the priority room is not selected, that is, when the priority switch 100 of any of the room thermostats 92a for the priority room is not operated, the temperature of the air supplied from the air supply port 50 becomes a predetermined constant value. The electric valve 68 is adjusted, and the temperature of each room is controlled by adjusting the amount of air supplied to each room by the VAV unit 90. For example, a room 1 in which a room thermostat 92a for a priority room is provided
When a large number of people gather in 2a, the heating load is reduced, so that the damper 86 is operated in the closing direction in the VAV unit 90, and the amount of air supplied to the room 12a is reduced. Therefore, the indoor environment deteriorates due to the inability to secure the outside air required for ventilation. In such a case, the priority switch 1 of the room thermo 92a for the priority room is used.
By operating 00, the room 12a is selected as the priority room, and the VAV unit 90 provided in association with the priority room 12a is provided so that the amount of air supplied to the priority room 12a becomes the predetermined required maximum amount of air supply. The damper 86 is controlled. Then, the electric valve 68 is opened and closed based on a signal from the room thermostat 92a for the priority room, and the air conditioning temperature is controlled such that the room temperature of the priority room 12a becomes a predetermined constant value. At this time, in the rooms 12b to 12e other than the priority room 12a, the temperature is controlled by adjusting the air supply amount in each VAV unit 90.

Similarly, when the cooling operation is selected by the operation panel 102, the room selected as the priority room is preferentially air-conditioned. According to this embodiment, since the air supply capacity of the air conditioner 16 is made smaller than the sum of the basic maximum air supply amounts of the respective rooms, the air conditioner 16 can be downsized and the energy consumption can be reduced. In a house or the like, since all rooms are rarely used at the same time, even if the air supply capacity of the air conditioner 16 is reduced, almost no problem occurs.

Further, the required maximum supply amount and the required outside air amount during the sleep operation and the required maximum supply amount and the required outside air amount of the priority room in which the priority switch is not operated are made smaller than the basic maximum supply amount and the basic outside air amount. Therefore, in each case, energy consumption can be reduced, and noise can be reduced. Since the priority room can be sufficiently supplied with air, the outside air required for ventilation of the priority room can be reliably secured, and the unevenness of the air conditioning environment of the priority room can be eliminated.

[Brief description of the drawings]

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

FIG. 2 is an illustrative view showing a room thermostat for a priority room used in the embodiment of FIG. 1;

FIG. 3 is an illustrative view showing a room thermo for a general room used in the embodiment of FIG. 1;

FIG. 4 is an illustrative view showing an operation panel used in the embodiment of FIG. 1;

FIG. 5 is a flowchart showing an air volume setting operation in the embodiment of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air conditioning system 12a-12e ... Room 14 ... Controller 16 ... Air conditioner 18 ... Casing 34 ... Return air fan 36 ... Supply air fan 52 ... Cooling coil 54 ... Heating coil 56 ... Humidifier 58 ... Temperature sensor 60 ... Outside air Mouth 84: Air supply duct 90: VAV unit 92: Room thermo 102: Operation panel

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isamu Tanabe 5-1-1, Mamiminami, Koryo-cho, Kitakatsuragi-gun, Nara Prefecture (72) Inventor Shuzo Akita Bota Train Co., Ltd. Tochigi Plant (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 3/044 F24F 11/02 102

Claims (5)

(57) [Claims] An air conditioner that heats or cools at least outside air and supplies it to each of a plurality of rooms; a room thermomeans provided in each of the plurality of rooms;
And a plurality of Vs provided in association with each of the plurality of rooms and individually controlling the amount of air supplied to each of the plurality of rooms in response to a signal from the room thermo means.
An AV unit, wherein a required maximum supply amount is set for each of the plurality of rooms;
When the sum of the required maximum supply amounts exceeds the supply capacity of the air conditioner, the supply amount proportionally divided by the ratio of the required maximum supply amount to the supply amount is the maximum supply amount of each room. Air conditioning system. 2. A priority switch means is provided in association with at least one of the plurality of rooms, and when the priority switch means is operated, a VAV unit associated with the priority room provided with the priority switch means is provided. The air-conditioning temperature of the air conditioner is controlled according to a signal from the room thermomeans of the priority room by controlling the air supply amount to the priority room as the required maximum air supply amount. 2. The air conditioning system according to 1. 3. The air conditioning system according to claim 1, further comprising a required maximum supply amount changing means for changing the required maximum supply amount of each of the plurality of rooms according to an operation mode. 4. The air conditioner has a damper for mixing a required amount of return air from the plurality of rooms with the outside air and a wind speed sensor for measuring the amount of the outside air. The opening degree of the damper is controlled so that the outside air amount measured by the air conditioner is equal to the sum of the required outside air amount of each room to be air-conditioned, and the sum of the required outside air amount exceeds the outside air intake capacity of the air conditioner. The air conditioning system according to any one of claims 1 to 3, wherein the air conditioner is operated with the outside air intake capacity when the air conditioner is operated. 5. The air conditioning system according to claim 4, further comprising a required outside air amount changing means for changing a required outside air amount of each of the plurality of rooms according to an operation mode.