JPH06313584A - Air conditioner - Google Patents

Abstract

PURPOSE:To obtain a sufficient atmospheric amount and to improve a heat exchanging efficiency by providing a first fan for sucking circulating air, a second fan for supplying the atmosphere to a room, first, second fan drive motors, a damper and a heat exchanging coil. CONSTITUTION:When a first fan 30 and a second fan 32 are driven by a motor 34, circulating air is sucked from rooms 12a-12e to be air conditioned by the fan 30, and the atmosphere is sucked out of a room by the fan 32. Part of the circulating air is discharged out of the room, and the residue is mixed with the atmosphere via a damper 28. Mixed air of the circulating air and the atmosphere is applied to heat exchanging coils 48, 50 through the fan 32, cooled or heated, then supplied to the rooms 12a-12e to be air conditioned. A mixing ratio of the circulating air to the atmosphere can be arbitrarily set by regulating an opening of the damper 28. Thus, a sufficient atmospheric amount can be obtained, and a heat exchanging efficiency is improved.

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 that air-conditions a plurality of rooms in a house and drives a supply fan and a ventilation fan or an exhaust fan with one motor. .

[0002]

2. Description of the Related Art An example of this type of conventional air conditioner is disclosed in Japanese Patent Laid-Open No. 236028/1992.

[0003]

In the above-mentioned prior art,
Although there is an advantage that only one motor is required, the return air and the exhaust air from the room to be air-conditioned are taken into the air conditioner through two independent ducts, respectively, so that the whole system becomes large. was there.

Further, since the amount of intake of outside air cannot be controlled, there is a risk that a sufficient amount of outside air cannot be secured when the temperature of the room to be air-conditioned is controlled by the VAV unit. Further, since the return air and the outside air are supplied to the heat exchange coil without being sufficiently mixed, there is a problem that the heat exchange efficiency is poor.

Therefore, a main object of the present invention is to provide an air conditioner capable of downsizing the entire system, ensuring a sufficient amount of outside air, and improving heat exchange efficiency.

[0006]

According to the present invention, there is provided a first fan for sucking in return air from a room to be conditioned, a second fan for sucking at least outside air and blowing the air to the room, and a first fan and a second fan. In an air conditioner equipped with a motor for simultaneously driving and, a damper provided on the upstream side of the second fan and for mixing a required amount of return air with the outside air, and a heat exchange provided on the downstream side of the second fan. The air conditioner further includes a coil.

[0007]

When the motor drives the first fan and the second fan, the first fan draws in return air from the room to be air-conditioned, and the second fan draws in outside air from outside. Part of the return air is discharged outdoors, and the rest is mixed with the outside air through the damper. Then, the mixture of return air and outside air is supplied to the heat exchange coil through the second fan, heated or cooled, and then supplied to the room to be air-conditioned. The mixing ratio of the return air and the outside air can be arbitrarily set by adjusting the opening degree of the damper.

[0008]

According to the present invention, since it is not necessary to distinguish between return air and exhaust gas when taking it into the air conditioner, it is not necessary to separately provide an exhaust duct. Therefore, the entire system can be downsized. In addition, since the mixing ratio of the return air and the outside air can be arbitrarily set by adjusting the opening degree of the damper, the optimum amount of outside air can be secured even when the temperature of the room to be air-conditioned is controlled by the VAV unit.

Furthermore, since the confluence of the return air and the outside air is on the upstream side of the second fan, the air-fuel mixture sufficiently mixed by the second fan can be supplied to the heat exchange coil.
Therefore, the heat exchange efficiency can be improved. 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.

[0010]

1 to 4, an air conditioner 10 of this embodiment is applied to an air conditioning system for air conditioning a plurality of (five in this embodiment) rooms 12a to 12e in a house. And includes a casing 14. Casing 14
A partition wall 16 is formed inside the partition wall, and the partition wall 16 is provided with a total heat exchanger 18. Thereby, casing 1
Inside the chamber 4, there are formed a first chamber 20, a second chamber 22, a third chamber 24 and a fourth chamber 26. In addition, the partition wall 16
A damper 28 that opens and closes the first chamber 20 and the second chamber 22 in an openable and closable manner, a motor 34 that simultaneously drives a return air fan 30 and an air supply fan 32, which will be described later, and an inverter 36 that controls the rotation speed of the motor 34. It is provided.

A return air port 38 is formed on the right side surface of the first chamber 20, and an air filter 40, a temperature sensor 42, a humidity sensor 44 and a return air fan 30 are provided inside the first chamber 20 from the upstream side. Arranged in order. An air supply port 46 is formed on the right side surface of the second chamber 22, and inside the second chamber 22, the air supply fan 32, the cooling coil 48, and the heating coil 5 are arranged from the upstream side.
0, the humidifier 52, and the 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 24 and the fourth chamber 26, respectively, and a wind speed sensor 60 and an air filter 62 are arranged inside the third chamber 24. Outside the casing 14, electric valves 64 and 66 that operate the cooling coil 48 and the heating coil 50, and an electromagnetic valve 68 that operates the humidifier 52.
Etc. are provided.

The temperature sensors 42 and 54, the humidity sensor 44, and the wind speed sensor 60 are connected to the controller A of the controller 70.
I (analog input) terminal 72, electric valves 64 and 66, damper 28 and inverter 36 are connected to AO (analog output) terminal 74, and inverter 36 is further connected to DI (digital input) terminal 76. The electromagnetic valve 68 is connected to the DO (digital output) terminal 78.

On the other hand, in each of the rooms 12a-12e in the house,
An air supply port 80 and a return air port 82 are formed, the air supply port 80 and the air supply port 46 of the air conditioner 10 are communicated with each other through the air supply duct 84, and the return air port 82 and the air conditioner 10 are returned. Mouth 38
And are communicated with each other via a space above the ceiling (not shown). Further, the air supply duct 84 is provided with a VAV (variable air volume) unit 90 including a damper 86 and a wind speed sensor 88 in association with each of the chambers 12a to 12e.
The room thermo 9 provided in each of the rooms 12a to 12e.
2 are connected. Each VAV unit 90 has an operation panel 9
4 to the SI (Sial Interface) terminal 96 of the controller 70.

In operation, when the heating operation is selected by the operation panel 94, the electric valve 6 of the cooling coil 48 is selected.
4 is closed and the electrically operated valve 66 of the heating coil 66 is opened. Further, the electromagnetic valve 68 of the humidifier 52 is opened if necessary. Then, the return air fan 30 and the air supply fan 32 are driven by the motor 34 at a predetermined rotation speed.

When the return air fan 30 and the supply air fan 32 are driven, the return air sent from the return air openings 82 of the chambers 12a to 12e is passed through the return air openings 38 and the first return air of the air conditioner 10.
It is taken into the chamber 20. The return air taken into the first chamber 20 is dedusted through the air filter 40, part of which flows into the fourth chamber 26 through the total heat exchanger 18, and the rest of which flows into the second chamber 22 through the damper 28. To do. Fourth chamber 26
The return air flowing in is discharged to the outside through the exhaust port 58. In addition, outside air from the outside passes through the outside air outlet 56
After being taken into the chamber 24 and dust-removed through the air filter 62, it flows into the second chamber 22 through the total heat exchanger 18 and is mixed with the return air that has flowed through the damper 28. At this time, the opening degree of the damper 28 is controlled so that the outside air amount measured by the wind speed sensor 60 becomes the required outside air amount.

The mixture of outside air and return air is sufficiently mixed in the air supply fan 32, then heated to a constant temperature through the heating coil 50, humidified as necessary through the humidifier 52, and the air supply port. It is supplied from 46 through the air supply duct 84 to each room to be air-conditioned. Each VAV unit 90
In the above, the opening degree of the damper 86 is controlled so that the room temperature detected by the room thermostat 92 becomes a predetermined constant value.

Similarly, when the cooling operation is selected by the operation panel 94, the supply air sufficiently mixed at a predetermined ratio and cooled to a predetermined temperature can be supplied to each room to be air-conditioned. According to this embodiment, since the return air fan 30 and the air supply fan 32 are driven by the single motor 34, the air conditioner 10 can be downsized and the power consumption can be reduced. Furthermore, since the number of driving parts is small, the reliability of operation can be improved.

Further, since it is not necessary to separately provide a duct for taking the exhaust gas into the air conditioner 10 (first chamber 20), the whole system can be downsized. And the damper 28
Since the mixing ratio of the return air and the outside air can be set arbitrarily, the amount of outside air required for ventilation of each room to be air-conditioned can be reliably ensured. Further, a mixture of the return air and the outside air, which is sufficiently mixed by the air supply fan 32, is heated by the heating coil 5.
Since it is supplied to the cooling coil 48 or to the cooling coil 48, the heat exchange efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an illustrative view showing an air conditioning system to which an embodiment of the present invention is applied.

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

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

 10 ... Air conditioner 12a-12e ... Room 14 ... Casing 16 ... Partition wall 18 ... Total heat exchanger 28 ... Damper 30 ... Return air fan 32 ... Air supply fan 34 ... Motor 36 ... Inverter 48 ... Cooling coil 50 ... Heating coil 90 ... VAV unit 94 ... Operation panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isamu Tanabe 5-8-16 Maminami, Koryo-cho, Kitakatsuragi-gun, Nara (72) Inventor Shuzo Akita 28 Hirate Industrial Park, Utsunomiya City, Tochigi Prefecture Kubotat Lane Shares Company Tochigi factory

Claims (1)

[Claims] 1. A first fan for sucking in return air from a room to be air-conditioned, and a second fan for sucking at least outside air to blow the air into the room.
In an air conditioner including a fan and a motor that simultaneously drives the first fan and the second fan, in order to mix the required amount of the return air provided upstream of the second fan and to the outside air. And a heat exchange coil provided on the downstream side of the second fan.