JPH0727365A - Ceiling-mounted cassette type air conditioner - Google Patents

Abstract

PURPOSE:To obtain an air conditioner in which sufficient fresh outside air can be sucked to a room to be air-conditioned without using a booster fan. CONSTITUTION:A motor 5 is mounted at a center of an air conditioner body through motor mounting legs 6. An air circulation fan 4, an atmosphere intake thin fan 12 are mounted on a rotating shaft of the motor 5. A casing for surrounding the fan 12 is provided. A knockout 8 is provided at a ceiling of the body, and an outside air intake duct 9 is mounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted cassette type air conditioner embedded in a ceiling, and more particularly to a structure for realizing its outside air introduction function.

[0002]

2. Description of the Related Art The air in the room is human breath, cigarette smoke,
It is said that it is polluted by various dirt such as dust, and in order to create a comfortable environment in the room, fresh outside air of 30% or more of the air conditioning air volume is required. However, if fresh air is taken in as it is by a ventilation device or the like when introducing the outside air, there is a problem that cold dry occurs and a space for installing a device on the ceiling surface is newly required. Therefore, a method is adopted in which an outside air introduction duct is connected to the air conditioner to take in fresh outside air from the air conditioner. FIG. 8 is a cross-sectional view showing the internal structure of an air conditioner having a conventional outside air introduction function disclosed in, for example, Japanese Patent Laid-Open No. 63-254334. In the figure, reference numeral 1 denotes an air conditioner main body, which is provided with a suction opening 2 opening in the central portion of the lower surface and an air outlet 3 opening along each side of the periphery, and 5 is provided in the central portion of the main body by a motor mounting leg 6. An air circulation fan 4 is fixedly attached to the tip of the shaft of the motor that is supported. A heat exchanger 7 is provided on the outer circumference of the air circulation fan 4, and is attached to the ceiling surface of the main body. Reference numeral 11 denotes a main body built-in duct that connects the knockout 8 provided on the side surface of the main body and the suction port 2, and the knockout 8 is connected to an outside air introduction duct 9 that accommodates the booster fan 10.

Next, the operation will be described. When the air circulation fan 4 is driven by the motor 5, the indoor air in the room equipped with the air conditioner and the outside air are sucked into the air conditioner body 1 from the suction port 2. At this time, since the outside air is sucked through the outside air introduction duct 9, the knockout 8 and the main body built-in duct 11, a pressure loss due to the air passage resistance of the outside air introduction duct 9 and the main body built-in duct 11 occurs, but this pressure loss is caused by the booster fan. Complemented by driving 10. The sucked air is sent out in the circumferential direction by the air circulation fan 4, and after passing through the heat exchanger 7 to be heat-exchanged, is drawn out from the air conditioner main body 1 to the room through the air outlet 3.

[0004]

In the conventional air conditioner, when fresh outside air is introduced into a room to be air-conditioned, the outside air introduction duct 9 is knocked out in the air conditioner body 1.
It was done by attaching to. The knockout 8 is connected to the suction port 2 and the duct 11 with a built-in main body, but it is necessary to make the size of the air conditioner main body 1 as small as possible because of the space to be embedded in the ceiling. Since there is not enough room to secure a sufficient space for the main body built-in duct 11, sufficient outside air cannot be introduced, and a large pressure loss in the built-in duct 11 causes a large noise. There is also a method of mounting the outside air intake box 17 under the main body 1 as shown in FIG. 9 in order to secure the duct size, but this is costly and the space for embedding in the ceiling is equal to the outside air intake box 17. Only need extra. Further, since the outside air is taken in through the outside air introduction duct 9 and the main body built-in duct 11, it is necessary to provide the booster fan 10 to compensate for the pressure loss corresponding to the air path resistance, and the power supply wiring to supply the booster fan 10 is It had to be separated from the air conditioner. Further, when the booster fan 10 is driven, the driving sound is transmitted to the main body 1 through the outside air introducing duct 9 and noise is generated.

The present invention has been made in order to solve the above problems, and it is not necessary to provide a space for a duct with a built-in main body or an outside air intake box in the main body of an air conditioner, and a booster. The objective is to obtain an air conditioner that can quietly take in sufficient fresh air without using a fan.

[0006]

According to a first aspect of the present invention, there is provided a ceiling-mounted cassette type air conditioner, wherein an air conditioner main body having a knockout at a central portion of a ceiling surface, a suction port opening at a central portion of a lower surface of the main body, and In a ceiling-suspended cassette type air conditioner comprising a blowout opening that opens along the periphery of the main body, an air circulation fan provided in the center inside the main body, and a motor that drives this air circulation fan, An outside air intake duct attached to a knockout, and a thin outside air intake fan, which is provided inside the main body so as to face the knockout and is driven by the motor, are provided.

The ceiling-mounted cassette type air conditioner according to claim 2 is
An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and an air circulation centered inside the body. A ceiling-mounted cassette type air conditioner equipped with a fan for cooling and a motor for driving the fan for circulating air, and an outside air intake duct attached to the knockout, and an outside of the main body facing the knockout. And a thin fan for taking in outside air, which is driven by the motor.

The ceiling-mounted cassette type air conditioner of claim 3 is
An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and an air circulation centered inside the body. In a ceiling-mounted cassette type air conditioner equipped with a fan for air and a motor for driving the fan for air circulation, the air conditioner is provided between the knockout and an outside air intake duct attached to the side surface of the main body, and has a wide width. It is equipped with a short duct adapter.

[0009]

According to the ceiling-mounted cassette type air conditioner of claims 1 and 2,
Outside air can be introduced into the air conditioner without using a booster fan. Further, since it is not necessary to provide the booster fan in the middle of the outside air intake duct, the duct can be easily attached and the problem of noise generated from the booster fan is eliminated. Further, it is not necessary to provide a built-in duct in the main body of the air conditioner, the air conditioner can be made small, and the pressure loss is reduced and the noise value is lowered.

The ceiling-mounted cassette type air conditioner according to claim 3 is
The height of the ceiling can be lowered.

[0011]

【Example】

Example 1. 1 is a cross-sectional view showing a first embodiment of the present invention, in which 1 to 9 are the same as the above-mentioned conventional device. 12
Is a thin fan for taking in outside air, and a turbo fan is used in this embodiment, and is driven together with the air circulation fan 4 by a motor 5 that drives the air circulation fan 4.
An external air intake bell mouth 13 is attached to the knockout 8 together with the tip of the external air introduction duct 9.

In the air conditioner configured as described above, when the motor 5 is driven, the air circulation fan 4 rotates to suck indoor air from the suction port 2 and at the same time the thin outside air intake fan 12 rotates. The pressure loss in the duct 9 is supplemented and the outside air is taken in from the knockout 8. The taken-in outside air is sent out in the circumferential direction, merges with the indoor air sent by the air circulation fan 4 in the circumferential direction, undergoes heat exchange in the heat exchanger 7, and is then led out from the air outlet 3 into the room.

Example 2. In the first embodiment, the outside air intake bell mouth 13 is attached to the knockout 8, but in the second embodiment shown in FIG. 2, the bell mouth portion is formed on the ceiling surface of the main body, and the same operation is performed without using the bell mouth. Can be expected.

Example 3. Figure 3 shows a thin fan 1 for outside air intake.
An axial fan is used as 2, a motor mounting leg 6 is attached to the outside air intake fan casing 14, and the motor 5 is fixed.

In the third embodiment shown in FIG. 3, the outside air intake thin fan 12 rotates to supplement the pressure loss in the duct 9 and take in outside air from the knockout 8. The taken-in outside air passes through the outside air intake fan casing 14, and the outside air outlet 16
To the central portion of the air circulation fan 4, merges with the indoor air sucked by the air circulation fan 4, is sent in the circumferential direction, and is heat-exchanged by the heat exchanger 7, and then from the outlet 3. It is led to the room.

Example 4. Figure 4 shows a thin fan 1 for outside air intake.
In the example in which 2 is provided outside the main body, an axial fan is used as the fan. Reference numeral 14 denotes a fan casing for taking in outside air, which is attached to the knockout 8, and the tip of the outside air introducing duct is connected to the upper end, so that the same operation as in the third embodiment can be obtained.

Embodiment 5. Although the outside air intake fan casing 14 is attached to the knockout 8 in the fourth embodiment,
In the fifth embodiment shown in FIG. 5, a fan casing is formed by the main body ceiling surface and the outside air introducing duct 9, and the same operation can be expected without using the outside air mounting fan casing 14.

Example 6. FIG. 6 is an external view of an embodiment in which the outside air introducing duct is attached to the main body side via the duct adapter 15, and FIG. 7 is a sectional view thereof. By doing so, the height of the ceiling can be reduced. In this case, the pressure loss becomes larger than that in the case where the outside air introduction duct 9 is directly attached to the knockout 8, and the outside air intake amount may be reduced accordingly. Therefore, in order to suppress the height as much as possible, it is necessary to make the shape wide and increase the air passage area.

[0019]

According to the ceiling-cassette type air conditioner of claim 1, an air conditioner main body having a knockout in the central portion of the ceiling surface, a suction port opening in the central portion of the lower surface of the main body, and along the periphery of the main body. In a ceiling-suspended cassette type air conditioner equipped with a blow-out opening that opens in the main body, an air circulation fan provided in the center of the main body, and a motor that drives the air circulation fan, the ceiling-mounted cassette air conditioner is attached to the knockout. Since it is configured to include an outside air intake duct and an outside air intake thin fan that is provided inside the main body so as to face the knockout and is driven by the motor, without using a booster fan. Outside air can be introduced into the air conditioner. Further, since it is not necessary to provide the booster fan in the middle of the outside air intake duct, the duct can be easily attached and the problem of noise generated from the booster fan is eliminated. Further, it is not necessary to provide a built-in duct in the main body of the air conditioner, the air conditioner can be made small, and the pressure loss is reduced and the noise value is lowered.

The ceiling-mounted cassette type air conditioner of claim 2 is
An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and an air circulation centered inside the body. A ceiling-mounted cassette type air conditioner equipped with a fan for cooling and a motor for driving the fan for circulating air, and an outside air intake duct attached to the knockout, and an outside of the main body facing the knockout. And a thin fan for taking in the outside air, which is driven by the motor and is installed in the air conditioner, the outside air can be introduced into the air conditioner without using a booster fan. Further, since it is not necessary to provide the booster fan in the middle of the outside air intake duct, the duct can be easily attached and the problem of noise generated from the booster fan is eliminated. Further, it is not necessary to provide a built-in duct in the main body of the air conditioner, the air conditioner can be made small, and the pressure loss is reduced and the noise value is lowered.

The ceiling-mounted cassette type air conditioner of claim 3 is
An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and an air circulation centered inside the body. In a ceiling-mounted cassette type air conditioner equipped with a fan for air and a motor for driving the fan for air circulation, the air conditioner is provided between the knockout and an outside air intake duct attached to the side surface of the main body, and has a wide width. Since it is configured with a short duct adapter,
The height of the ceiling can be lowered.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a bell mouth part showing an air conditioner according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an air conditioner of Embodiment 3 of the present invention.

FIG. 4 is a cross-sectional view showing an air conditioner of Embodiment 4 of the present invention.

FIG. 5 is a cross-sectional view of a fan casing portion of an air conditioner according to Embodiment 5 of the present invention.

FIG. 6 is an outline view showing an air conditioner of Embodiment 6 of the present invention.

FIG. 7 is a cross-sectional view showing an air conditioner of Embodiment 6 of the present invention.

FIG. 8 is a cross-sectional view showing a conventional air conditioner.

FIG. 9 is an outline view showing a state in which an outside air intake box is attached to a conventional air conditioner.

[Explanation of symbols]

 1 Air Conditioner Main Body 2 Suction Port 3 Air Outlet 4 Air Circulation Fan 5 Motor 6 Motor Mounting Leg 7 Heat Exchanger 8 Knockout 9 Outside Air Introduction Duct 12 Outside Air Intake Thin Fan 13 Outside Air Intake Bell Mouth 14 Outside Air Inlet fan casing 15 Duct adapter 16 Outside air outlet 17 Outside air intake box 18 Outside air introduction air flow controller

Claims (3)

[Claims] 1. An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and a center inside the body. In a ceiling-mounted cassette type air conditioner provided with an air circulation fan provided and a motor for driving the air circulation fan, an outside air intake duct attached to the knockout and an air intake duct opposed to the knockout. And a thin fan for taking in outside air, which is provided inside the main body and is driven by the motor. 2. An air conditioner main body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the main body, an air outlet opening along the periphery of the main body, and a center inside the main body. In a ceiling-mounted cassette type air conditioner provided with an air circulation fan provided and a motor for driving the air circulation fan, an outside air intake duct attached to the knockout and an air intake duct opposed to the knockout. And a thin fan for taking in outside air, which is provided outside the main body and is driven by the motor. 3. An air conditioner body having a knockout at the center of the ceiling surface, a suction port opening at the center of the lower surface of the body, an air outlet opening along the periphery of the body, and a center inside the body. In a ceiling-suspended cassette type air conditioner including an air circulation fan provided and a motor for driving the air circulation fan, between the knockout and an outside air intake duct attached to the side surface of the main body. A ceiling-mounted cassette type air conditioner equipped with a wide and short duct adapter.