JPH11132491A - Ceiling-installed type indoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a fault of an easy generation of an air flow sound from fins of a heat exchanger due to diffusion of a wind from a fan impeller generally not radially but at an angle to the exchanger or a decrease in a heat exchanger capacity due to an easy distribution of a wind velocity. SOLUTION: A propeller fan impeller is arranged at a downstream side of a heat exchanger 3 to introduce the air passing the exchanger 3 substantially perpendicularly to the exchanger 3, an air flow sound from fins is not generated, and a distribution of a wind velocity is scarcely provided. Therefore, the ceiling- installed type indoor unit of the air conditioner having a low noise and high performance is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted indoor unit for an air conditioner.

[0002]

2. Description of the Related Art As a typical example of the configuration of a conventional general ceiling-mounted indoor unit, there is a configuration as disclosed in Japanese Patent Application Laid-Open No. 5-39930.

The configuration will be described below with reference to FIG. In FIG. 5, a heat exchanger 3 facing the air outlet 6 is provided on the entire circumference of the side periphery in a casing provided with a suction port 5 at the center of the lower surface and an outlet 6 on the entire circumference of the lower surface. And a centrifugal fan impeller 20 in the center.
Is disposed so as to face the air suction port 5.

In this configuration, the air flow sucked from the suction port 5 opened at the center of the lower surface of the casing 1 enters the centrifugal fan impeller 20. Centrifugal fan impeller 2
When it exits 0, the heat is exchanged when passing through the substantially annular heat exchanger 3, and then discharged into the room from the outlets 6 on the entire circumference of the lower surface side to cool or heat the room.

[0005]

However, in the above-described conventional configuration, the wind coming out of the centrifugal fan impeller 20 is generally not at the radial direction but at an angle, and is blown to the heat exchanger 3 at this angle, so that heat exchange is performed. There is a problem that the airflow noise is easily generated from the fins of the heat exchanger 3 and the heat exchanger capacity is reduced due to the easy distribution of the wind speed.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a low-noise, high-capacity air conditioner-mounted indoor unit.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a casing provided with a suction port at a lower peripheral portion and a blowout port at a lower central portion. A heat exchanger facing the air suction port is disposed, and a propeller fan is disposed in the center portion facing the air outlet.

As described above, by disposing the propeller fan or the impeller of the mixed flow fan downstream of the heat exchanger, the air passing through the heat exchanger enters the heat exchanger almost vertically, and from the fins. Since the airflow noise does not occur and the wind speed distribution is hardly distributed, a ceiling-mounted indoor unit of a low-noise and high-performance ventilation harmony machine can be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that a casing having a suction port on a lower peripheral portion and a blowout port on a lower central portion is provided with the air suction port on the entire peripheral portion. A facing heat exchanger is arranged, and a propeller fan is arranged in the center so as to face the air outlet.

According to this configuration, by disposing the propeller fan impeller on the downstream side of the heat exchanger, the air passing through the heat exchanger enters the heat exchanger almost vertically, so that the airflow noise from the fins Does not occur, and the distribution of the wind speed is hard to be distributed, so that a ceiling-mounted indoor unit of an air conditioner with low noise and high performance can be obtained.

According to a second aspect of the present invention, in a casing provided with a suction port at a lower peripheral portion and a blowout port at a lower central portion, heat exchange facing the air suction port is provided around the entire peripheral portion. A mixed flow fan is disposed at the center of the container so as to face the air outlet.

According to this configuration, the above-mentioned claim 1 is provided.
The same effect as the invention described in (1) is obtained, and since the mixed flow fan has a higher static pressure than the propeller fan, when the heat exchanger with higher ventilation resistance is provided, the performance is higher than that of the propeller fan. The ceiling-installed indoor unit of the air conditioner can be obtained.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the suction port on the lower peripheral portion is provided with:
A shield is provided for closing a part thereof, and a blow-off air deflecting device is provided for deflecting wind blown from a blow-out opening provided in the center of the lower surface in the direction of the shield.

According to this configuration, the above-mentioned claim 1 is provided.
Alternatively, in the invention described in 2, the air conditioner is capable of avoiding a short circuit in which the blowout wind enters the suction port in the direction when the blowout direction is deflected near horizontal in order to improve the indoor temperature distribution during the cooling operation. A ceiling-mounted indoor unit is obtained.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the position of the shielding portion that closes a part of the suction port on the lower peripheral portion can be changed, and in conjunction with the position,
The apparatus is provided with a blow-off air deflecting device that deflects the blow-off wind from a blow-out port provided in the center of the lower surface in the direction of the shielding section.

According to this configuration, the above-mentioned claim 3 is provided.
In the invention of the above, in the case of deflecting the blowing direction close to horizontal in order to improve the indoor temperature distribution during cooling operation, the blowing wind can be blown in a free direction in the horizontal plane, and the suction port in that direction is interlocked. As a result, a ceiling-mounted indoor unit of an air conditioner that can always avoid short circuits can be obtained.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a lid for closing a part of the suction port on the lower peripheral portion to form a shielding portion, and a blowout port provided at the lower central portion. A wind deflecting device for deflecting the wind blasted from the direction of the shielding part is integrally formed, and is rotatable about a rotation axis that stands perpendicular to the center of the lower surface.

According to this structure, the blow-off air deflecting device integrally formed with a lid for closing a part of the suction port is rotated only about the rotation axis which stands vertically at the center of the lower surface. When deflecting the blowing direction close to horizontal to improve the indoor temperature distribution, the blowing wind can be blown in any direction in the horizontal plane, and the suction port in that direction is interlocked and closed, so it is always An indoor unit installed on the ceiling of an air conditioner that can avoid short circuits can be obtained.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the suction port provided on the lower peripheral portion is divided into a plurality of portions, and a cover is formed by closing a portion thereof to form a shielding portion. And a blow-off air deflecting device for deflecting the blow-off wind from the blow-out port provided at the center of the lower surface in the direction of the shielding portion.

According to this configuration, the above-mentioned claim 4 is provided.
In the invention of the present invention, when the blowing direction is deflected close to horizontal in order to improve the indoor temperature distribution during the cooling operation, the blowing wind can be blown in a free direction in the horizontal plane, and the suction port in that direction is interlocked. As a result, a ceiling-mounted indoor unit of the air conditioner that can always avoid a short circuit can be obtained.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals.

(Embodiment 1) FIG. 1 is a sectional view of an indoor unit of a ceiling-mounted air conditioner according to a first embodiment of the present invention.

Referring to FIG.
A heat exchanger 3 facing the air suction port 5 is disposed in a substantially annular shape around the entire circumference of a side periphery in a casing provided with a blowout port 6 in the center of the lower surface, and a propeller fan blade is provided in the center. A car 90 is arranged facing the air outlet 6.

According to the present embodiment, the air flow A sucked from the suction port 5 opened in the peripheral portion on the lower surface side of the casing 1.
After heat exchange at the time of passing through the substantially annular heat exchanger 3,
After flowing through the suction air passage 13, the propeller fan impeller 9
Enter 0. Thereafter, the air exits from the propeller fan impeller 90 and is discharged into the room through the air outlet 6 at the center of the lower surface of the main body, thereby cooling or heating the room.

In this case, since the air flow A is drawn into the heat exchanger by the negative pressure generated inside the substantially annular heat exchanger 3, the inflow direction is perpendicular to the heat exchanger, that is, the heat exchanger is in a vertical direction. Fins and the wind speed distribution is reduced,
The generation of noise due to turbulence near the fins is small, and a high heat exchanger capacity can be obtained.

By the way, according to this configuration, since the blown air is blown almost downward from the blowout port 6 at the center of the lower surface, the blown air having a low specific gravity reaches the lower part of the room during heating, and the temperature distribution of the room is reduced. On the contrary, in order to maintain a good temperature distribution in the living room during cooling, it is necessary to send a blown air having a high specific gravity to the upper part of the living room. It is provided.

As shown in FIG. 2, during cooling, the air flow B deflected in the horizontal direction by the blowing
Is to prevent a part of it from being sucked into the suction port 5 on the lower surface side peripheral portion (short circuit).
The suction port in the direction of the blown air flow B is closed as a shielding portion 5a.

Further, in this embodiment, the blow-up / down deflecting device 11 is also adapted to determine the blow-off wind direction in the horizontal plane, and as shown in FIG. The blow-off air deflecting device 11 and the lid 12 that covers the suction port to form the shielding part 5a are integrally formed so that the part 5a moves in conjunction with the part, and rotates about a rotation axis that stands vertically at the center of the lower surface of the main body. It is possible. Thus, the suction port 5 in the direction of the air flow B deflected by the blow-off air deflector 11 is always closed by the lid 12 to serve as a shielding portion 5a, and the blow-out direction is changed in a direction preferred by the user. No matter how you decide, no short kit will happen.

Embodiment 2 FIG. 3 is a perspective view of an indoor unit of a ceiling-mounted air conditioner according to a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals.

In this embodiment, the suction port 5 is composed of four rectangular suction ports, each of which has a lid 12 for closing the suction port 5 and forming a shielding portion 5a. When the blowing wind in the horizontal plane is determined by the blowing wind vertical deflecting device 11, the suction port 5 in the blowing direction is closed by the lid 12 to form the shielding portion 5a. As a result, the suction port 5 in the direction of the airflow B deflected by the blowing air deflector 11 is necessarily closed by the lid 12 and
Therefore, no matter how the blow direction is determined, the short circuit does not occur.

Although the propeller fan 9 is used in these two embodiments, the propeller fan 9 is used as shown in FIG.
The same effect can be obtained by using the mixed flow fan 10 instead of the above.

Further, since the mixed flow fan can obtain a higher static pressure than the propeller fan, when the heat exchanger having a higher ventilation resistance is provided, the ceiling mounted type of the air conditioner has a higher performance than the propeller fan. An indoor unit is obtained.

[0033]

As is apparent from the above embodiment, the invention according to the first aspect of the present invention relates to a ceiling-mounted indoor unit for an air conditioner, wherein a suction port is provided at a lower peripheral portion and a blow port is provided at a lower central portion. In the casing provided with, a heat exchanger facing the air suction port is arranged on the entire circumference of the side peripheral part, and a propeller fan is arranged in the center part facing the air outlet, and in this configuration, According to this, by arranging the propeller fan impeller downstream of the heat exchanger, the air passing through the heat exchanger enters the heat exchanger almost vertically, no airflow noise from the fins is generated, and the wind speed distribution is also reduced. This makes it possible to obtain a ceiling-installed indoor unit of a low-noise and high-performance air conditioner.

According to a second aspect of the present invention, in the ceiling-mounted indoor unit of the air conditioner, the side peripheral portion is entirely provided in a casing having a suction port on a lower peripheral portion and a blowout port on a lower central portion. A heat exchanger facing the air suction port is disposed around the periphery, and a mixed flow fan is disposed in the center at a position facing the air discharge port. The same effect as the invention can be obtained, and the mixed flow fan can obtain a higher static pressure than the propeller fan. Therefore, when a heat exchanger with higher ventilation resistance is provided, air conditioning with higher performance than the propeller fan This produces an effect that a ceiling-mounted indoor unit of the machine can be obtained.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the suction port on the lower surface side peripheral portion includes:
A shielding part for closing a part thereof is provided, and a blowing wind deflecting device for deflecting a blowing wind from a blowing port provided in a central part of the lower surface in a direction of the shielding part is provided. In the invention according to claim 1 or 2,
In order to improve the indoor temperature distribution during cooling operation, if the blowing direction is deflected nearly horizontal, the ceiling-mounted indoor unit of the air conditioner can avoid the short circuit where the blowing air enters the suction port in that direction. It has the effect of being obtained.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the position of the shielding portion for closing a part of the suction port on the lower peripheral portion can be changed, and in conjunction with the position,
The air conditioner includes a blow-off air deflector for deflecting a blow-off wind from a blow-out port provided in a central portion of the lower surface toward the shielding portion. When deflecting the blowing direction close to horizontal to improve the temperature distribution, the blowing wind can be blown in any direction in the horizontal plane, and the suction port in that direction is interlocked and closed,
This has the effect that an indoor unit that can be installed on the ceiling of an air conditioner that can always avoid short circuits can be obtained.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a cover for closing a part of the suction port on the lower peripheral side to form a shielding portion, and a blowout port provided at the lower central portion. A blow-off air deflector that deflects blow-off air from the direction of the shielding portion is integrally formed, and is rotatable around a rotation axis that stands perpendicularly to the center of the lower surface. According to this configuration, the suction port By simply rotating the blow-off air deflector, which integrally forms a lid that partially closes, around a rotating shaft that stands vertically at the center of the lower surface, the blow-out direction is set horizontally to improve the indoor temperature distribution during cooling operation. When deflecting close, the airflow can be blown out in a free direction in the horizontal plane, and the suction port in that direction is interlocked and closed, so the air conditioner ceiling installation that can always avoid short circuits An effect that type indoor unit will be obtained.

According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the suction port provided on the lower peripheral portion is divided into a plurality of portions, and a cover is formed by closing a portion of the plurality of portions. And a blowout air deflector for deflecting the blown air from a blowout opening provided in the center of the lower surface in the direction of the shielding portion. In order to improve the indoor temperature distribution, when the blowing direction is deflected close to horizontal, the blowing wind can be blown in a free direction in the horizontal plane, and the suction port in that direction is interlocked and closed. In addition, an effect that a ceiling-mounted indoor unit of an air conditioner that can always avoid a short circuit is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an indoor unit according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state of the indoor unit according to the first embodiment of the present invention during a cooling operation.

FIG. 3 is a cross-sectional view showing a state of a cooling operation of an indoor unit according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of an indoor unit according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional indoor unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Centrifugal fan 3 Heat exchanger 5 Suction port 5a Shield 6 Outlet 9 Propeller fan 10 Mixed flow fan 11 Blowing wind up / down deflector 12 Lid 13 Suction air passage 20 Centrifugal fan impeller 90 Propeller fan impeller 100 Mixed flow Fan impeller

Claims (6)

[Claims] 1. A heat exchanger facing the air suction port is disposed all around the lower peripheral side in a casing provided with a suction port on the lower peripheral side and an outlet at the lower central part. A ceiling-mounted indoor unit for an air conditioner, wherein a propeller fan is disposed in a central portion so as to face the air outlet. 2. A heat exchanger facing the air suction port is disposed around the entire periphery of the lower surface side in a casing provided with a suction port on the lower surface side peripheral portion and an outlet at the center portion of the lower surface. A ceiling-mounted indoor unit for an air conditioner, wherein a mixed flow fan is disposed in a central portion so as to face the air outlet. 3. An air outlet for providing a shielding portion for closing a part of the suction port on the peripheral portion on the lower surface side, and deflecting wind blown from an air outlet provided at a central portion of the lower surface toward the shielding portion. 2. A wind deflecting device is provided.
Alternatively, the ceiling-mounted indoor unit of the air conditioner according to 2. 4. A position of a shielding portion for closing a part of a suction port on a lower surface side peripheral portion can be changed, and, in conjunction with the position, a blowing wind from a blowing port provided in a lower surface central portion is formed.
The ceiling-mounted indoor unit of an air conditioner according to claim 3, further comprising a blow-off air deflector for deflecting in a direction of the shielding portion. 5. A lid for closing a part of a suction port on a lower peripheral portion to form a shielding portion, and a blower for deflecting a blowing wind from a blowing port provided at a lower central portion in a direction of the shielding portion. The ceiling-mounted indoor unit of an air conditioner according to claim 4, wherein the wind deflecting device is integrally formed, and is rotatable around a rotation axis that stands vertically at a lower central portion. 6. A lid provided on a lower surface side peripheral portion divided into a plurality of portions, a lid for closing a part thereof to form a shielding portion, and a blowout air from a blowout port provided at a lower surface central portion. The ceiling-mounted indoor unit for an air conditioner according to claim 4, further comprising a blowout air deflector for deflecting the air in the direction of the shielding portion.