JP2000111078A - Indoor unit for corner type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit for corner type air conditioner in which the performance is enhanced while reducing noise. SOLUTION: A body casing 2 comprises a front panel 2a having a suction opening 2a1, a bottom panel 2b having a rectangular air outlet 2b1 parallel with the front panel 2a, and a fan casing 3 comprising a substantially tubular section 3x extending upward from the fringe of the air outlet 2b1 and having suction openings at the upper central part of the front baffle plate 3×1 of the tubular section 3x and the upper part of left and right side plates 3×3, 3×4. An arcuate heat exchanger 7 is disposed oppositely to the front panel 2a in an air channel extending from the suction opening 2a1 toward the air outlet 2b1. A through fan 4 for sucking air from the suction opening through the heat exchanger 7 is disposed at the upper central part of the fan casing 3 and outer suction centrifugal fans 5, 6 having identical air volume are disposed coaxially on the opposite sides of the through fan 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of a corner-installed type air conditioner, and more particularly to a configuration and an arrangement of a blower and an air flow path.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing an example of a conventional corner-installed air conditioner, and FIG. 9 is a sectional view showing an example of an indoor unit of a conventional corner-installed air conditioner.

As shown in the figure, a conventional indoor unit 1 of a corner-installed type air conditioner which is installed at a corner of a ceiling and has a substantially fan-shaped bottom surface has an outlet 2x on a front panel 2a and an outlet 2x on a bottom panel 2b. A main body casing 2 having a suction port 2y, a centrifugal turbo fan 15 disposed at the center in an air flow path from the suction port 2y to the blowout port 2x, and provided to face the turbo fan 15; The structure was constituted by an arc-shaped heat exchanger 7.

However, in the indoor unit 1 of the corner-installed type air conditioner having the conventional structure, the flow of the air passing through the centrifugal turbo fan 15 passes through the heat exchanger 7 which is bent outward in an arc shape. In this case, there is a problem that it may be difficult to make the suction wind speed uniform. In addition, the air that has passed through the centrifugal turbo fan 15 is
There is a problem that noise is likely to be generated because of spraying. Further, in the case where the air conditioner is used not only for cooling but also for heating and cooling, there is a problem that the heating performance may be reduced in the structure in which the front panel 2a is provided with the outlet 2x.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional type, and has been proposed to improve the performance of an indoor unit of a corner-installed air conditioner and reduce noise at the corner. It is an object of the present invention to provide an indoor unit of a type air conditioner.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, an indoor unit of a corner-installed type air conditioner which is installed at a corner of a ceiling and has a fan-shaped planar shape, wherein a suction port is formed in a front panel. And a main body casing having a rectangular outlet formed on the bottom panel parallel to the front panel, and a rear partition plate extending upward from a rear edge of the outlet and having an upper end facing the upper surface of the main casing. A front partition plate extending above the front edge of the outlet and having an upper end facing the substantially lower end of the fan, and a left and right side plate extending above the left and right edges of the outlet and connected to the side end of the fan. A fan casing provided with a suction hole at the upper part of the front partition plate and the upper part of the left and right side plates of the substantially cylindrical part, and an air passage from the suction port to the air outlet. Arc-shaped heat exchange placed opposite the front panel And a once-through fan arranged at the upper center of the fan casing for sucking air from the suction hole through the heat exchanger, and an outer suction fan having the same air volume respectively coaxially arranged on both left and right sides of the once-through fan. And a centrifugal fan.

[0007] A drive motor for the centrifugal fan is disposed outside one of the left and right centrifugal fans. A wind guide plate facing the outer rear edge of the centrifugal fan is disposed between the one centrifugal fan and the drive motor from one end on the leeward side of the heat exchanger. A wind guide plate is provided so as to face from the other end of the leeward side of the heat exchanger to the outer rear edge of the other centrifugal fan.

Alternatively, the once-through fans are provided on the left and right, respectively. A drive motor for the once-through fan is disposed between the left and right once-through fans. Further, the air guide plates are arranged so as to face the central front edges of the left and right through-flow fans from the vertical center portion on the leeward side of the heat exchanger. Then, wind guide plates are provided so as to face the outer rear edges of the left and right centrifugal fans from both ends on the leeward side of the heat exchanger.

On the other hand, the diameter of the centrifugal fan is made smaller than the diameter of the once-through fan so that the air volume is the same. Alternatively, the width of the centrifugal fan is made smaller than the width of the once-through fan so that the air volume is the same. Alternatively, the number of blades of the centrifugal fan is made smaller than the number of blades of the once-through fan so that the air volume is the same. Alternatively, the blade mounting angle of the centrifugal fan is made larger than the blade mounting angle of the once-through fan so that the air volume is the same.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail based on embodiments with reference to the accompanying drawings. FIG. 1 is an installation perspective view of a corner-installed air conditioner showing one embodiment of the present invention, and FIG. 2A is a cross-sectional view of an indoor unit of a corner-installed air conditioner showing one embodiment of the present invention. FIG. 3B is a longitudinal sectional view, and FIG. 3 is a perspective view of a main part of an indoor unit of a corner-installed air conditioner showing one embodiment of the present invention. Note that the same reference numerals are used for the same parts as in the related art.

The present invention will be described below with reference to an embodiment shown in the drawings. 1 is an indoor unit of a corner-installed air conditioner, 2 is a main body casing, 2a is a front panel, 2a1 is a suction port, and 2b is Bottom panel, 2b1 is an outlet, 3 is a fan casing, 3x is a tubular part, 3a is a fan casing, 3ax is a tubular part, 3b is a fan casing, 3bx
Is a cylindrical portion, 4 is a once-through fan, 5 is a centrifugal fan, 6 is a centrifugal fan, 7 is a heat exchanger, 8a, 8b, 9a, 9b
Indicates a baffle plate.

The indoor unit 1 of a corner-installed air conditioner according to the present invention, which is installed at the corner of the ceiling and has a fan-shaped planar shape, will be described. First, the main body casing 2 includes the front panel 2
a is formed with a suction port 2a1, and a bottom surface panel 2b is formed with a rectangular outlet 2b1 parallel to the front panel 2a. In addition, it extends above the trailing edge of the outlet 2b1,
A rear partition plate 3x2 having an upper end facing the upper surface of the main body casing 2, and extending upward from a front edge of the outlet 2b1,
A substantially cylinder comprising a front partition plate 3x1 facing the substantially lower end of the fan, and right and left side plates 3x3 and 3x4 extending above the right and left edges of the outlet 2b1 and connected to side ends of centrifugal fans 5 and 6 described later. And a fan casing 3 having suction holes 3y, 3z1, and 3z2 at the upper center of the front partition plate 3x1 and the upper portions of the left and right side plates 3x3 and 3x4 of the substantially cylindrical portion 3x.

An arc-shaped heat exchanger 7 is provided in the air flow path from the suction port 2a1 to the air outlet 2b1 so as to face the front panel 2a. Next, the suction holes 3y, 3z1, 3z are passed through the heat exchanger 7.
A once-through fan 4 is arranged at the upper center of the fan casing 3 for sucking air from the fan casing 2. Further, centrifugal fans 5 and 6 having the same airflow are arranged coaxially on the left and right sides of the once-through fan 4 to constitute the indoor unit 1 of the corner-installed air conditioner. Note that the fan casing 3 of this embodiment has a box body at the rear to improve the workability of attachment to the main casing 2.

A drive motor 10 for the centrifugal fans 5, 6 is disposed outside one of the left and right centrifugal fans 5, 6. Then, the one centrifugal fan 5 and the drive motor 1 from one end of the heat exchanger 7 on the leeward side.
0, a wind guide plate 8a facing the outer rear edge of the centrifugal fan 5 is provided, and the other centrifugal fan 6 is connected to the other end of the heat exchanger 7 on the leeward side. A wind guide plate 8b facing the outer rear edge of the outside is provided.

Here, the operation according to this embodiment of the present invention will be described.
The effect will be described. The indoor unit 1 of the corner-installed type air conditioner of the present invention is provided with the inlet 2a1 in the front panel 2a, so that the air is sucked through the heat exchanger 7. For this reason, generation of noise can be reduced as compared with the method in which air is blown to the heat exchanger 7.

Further, a once-through fan 4 disposed at the center
Further, since the blower is composed of the centrifugal fans 5 and 6 having the same airflow and being disposed coaxially on the right and left sides of the once-through fan 4, respectively, the blower is constituted. It can be uniform. Then, the pressure difference when the flow-through fan 4 and the centrifugal fans 5, 6 are rotated by the same drive motor 10 by the air guide plates 8a, 8b can be improved, and turbulence can be prevented. .

On the other hand, FIG. 4A is a cross-sectional view of an indoor unit of a corner-mounted air conditioner showing another embodiment of the present invention.
(B) is a longitudinal sectional view, FIG. 5 is a perspective view of a main part of an indoor unit of a corner-installed air conditioner showing another embodiment of the present invention, and FIG. 6 (a) is a view in FIG. It is a corresponding principal part expanded sectional view. In this case, the once-through fans 4a and 4b are provided on the left and right, respectively. In addition, the cylindrical part 3ax of this embodiment,
A fan casing 3a having suction holes 3ay and 3az at the upper center and the upper side plate, a tubular portion 3bx and an upper center,
Two fan casings 3b each having a suction hole 3by, 3bz at the upper part of the side plate are provided at the rear as two box bodies, and the workability of mounting the fan casing 3b to the main body casing 2 is improved. And
A drive motor 10 for the once-through fans 4a, 4b is disposed between the left and right through-flow fans 4a, 4b.

Further, wind guide plates 9a are provided to face the central front edges of the left and right through-flow fans 4a, 4b from the vertical center portion on the leeward side of the heat exchanger 7, respectively. Further, the air guide plates 9b are respectively provided to face the outer rear edges of the left and right centrifugal fans 5 and 6 from both ends on the leeward side of the heat exchanger 7. Further, the width of the centrifugal fans 5, 6 is made smaller than the width of the once-through fans 4a, 4b to make the air volume the same.

The operation and effect of this embodiment are the same as those of the above-described embodiment, but a combination of the once-through fans 4a and 4b and the centrifugal fans 5 and 6 provides a symmetrical wind speed. By using the air guide plates 9a and 9b, the pressure difference when the one-way fan 4 and the centrifugal fans 5 and 6 are rotated by the same drive motor 10 can be improved, and turbulence can be further prevented.

FIG. 6B is an enlarged sectional view of a main part of an indoor unit of a corner-mounted air conditioner showing another embodiment of the present invention. In this case, the diameter of the centrifugal fan 6 is
The diameter of the once-through fan 4b is smaller than that of the once-through fan 4b to make the air volume the same. Similarly, the diameter of the centrifugal fan 5 is
The diameter of the once-through fan 4a is made smaller to make the air volume the same. (Not shown)

FIG. 6C is a cross-sectional view of a once-through fan showing another embodiment of the present invention. FIG. 6D shows another embodiment of the present invention combined with the above-mentioned once-through fan. It is sectional drawing of the centrifugal fan shown. In this case, the number of blades 6a1 of the centrifugal fan 6 is made smaller than the number of blades 4b1 of the once-through fan 4b to make the air volume the same. Similarly, the number of blades of the centrifugal fan 5 is also smaller than the number of blades of the once-through fan 4a to make the air volume the same. (Not shown)

FIG. 7 is an explanatory view showing a blade mounting angle (β) of a once-through fan and a blade mounting angle (α) of a centrifugal fan showing another embodiment of the present invention. In this case, the blade mounting angles (α) of the centrifugal fans 5 and 6 are made larger than the blade mounting angles (β) of the cross-flow fans 4a and 4b to make the air volume the same.

[0023]

According to the indoor unit of the corner-installed type air conditioner of the present invention, it is an indoor unit of the corner-installed type air conditioner which is installed at the corner of the ceiling and has a fan-shaped planar shape, and sucks into the front panel. Forming a mouth, a main body casing having a rectangular outlet formed on a bottom panel parallel to the front panel,
A rear partition plate extending upward from the rear edge of the air outlet, with the upper end facing the upper surface of the main body casing, and extending upward from the front edge of the air outlet, and the upper end substantially facing the lower end of the fan. A front partition plate, a substantially cylindrical portion extending upward from the left and right edges of the outlet and connected to the side end of the fan and comprising a left and right side plate. A fan casing having a suction hole at an upper portion thereof, an arc-shaped heat exchanger disposed opposite to the front panel in an air flow path from the suction port to the air outlet, and passing through the heat exchanger. It comprises a once-through fan arranged at the upper center of the fan casing for sucking air from the suction hole, and a centrifugal fan having an outside air suction of the same air volume arranged coaxially on both left and right sides of the once-through fan. I made it. As a result, it is possible to improve the performance of the indoor unit of the corner-installed air conditioner and provide an indoor unit of the corner-installed air conditioner with reduced noise.

[Brief description of the drawings]

FIG. 1 is an installation perspective view of a corner-mounted air conditioner showing one embodiment of the present invention.

FIG. 2A is a cross-sectional view of an indoor unit of a corner-installed air conditioner showing one embodiment of the present invention, and FIG. 2B is a vertical cross-sectional view.

FIG. 3 is a perspective view of a main part of an indoor unit of the corner-installed air conditioner, showing one embodiment of the present invention.

FIG. 4A is a cross-sectional view of an indoor unit of a corner-installed air conditioner showing another embodiment of the present invention, and FIG. 4B is a longitudinal cross-sectional view.

FIG. 5 is a perspective view of a main part of an indoor unit of a corner-mounted air conditioner showing another embodiment of the present invention.

6 (a) is an enlarged sectional view of a main part corresponding to FIG. 4 (a), and FIG. 6 (b) is an enlarged main part of an indoor unit of a corner-installed air conditioner showing another embodiment of the present invention. Sectional view, (c) is a cross-sectional view of a once-through fan showing another embodiment of the present invention, (d)
FIG. 9 is a sectional view of a centrifugal fan showing another embodiment of the present invention to be combined with the once-through fan of (c).

FIG. 7 is an explanatory view showing a blade mounting angle (β) of a once-through fan and a blade mounting angle (α) of a centrifugal fan according to another embodiment of the present invention.

FIG. 8 is an installation perspective view of a corner-installed air conditioner showing an example of the related art.

FIG. 9 is a cross-sectional view illustrating an example of an indoor unit of a conventional corner-installed air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit of a corner installation type air conditioner 2 Main body casing 2a Front panel 2a1 Inlet 2b Bottom panel 2b1 Outlet 3 Fan casing 3x Tubular part 3x1 Front divider 3x2 Rear divider 3x3 Right divider 3x4 Left divider 3y1 Suction Hole 3z1 Suction hole 3z2 Suction hole 3a Fan casing 3ax Tubular portion 3ay Suction hole 3az Suction hole 3b Fan casing 3bx Tubular portion 3by Suction hole 3bz Suction hole 4 Flow-through fan 4a Through-flow fan 4b Centrifugal fan 4b Fan 6 centrifugal fan 6a1 blade 7 heat exchanger 8a air guide plate 8b air guide plate 9a air guide plate 9b air guide plate 10 drive motor

Claims (11)

[Claims] 1. An indoor unit of a corner-installed air conditioner installed in a corner of a ceiling and having a fan shape in plan view, wherein a suction port is formed in a front panel, and a rectangular parallel to the front panel is formed in a bottom panel. A main body casing having a shaped outlet, a rear partition extending upward from a rear edge of the air outlet, and an upper end facing the upper surface of the main casing; and a rear partition extending upward from a front edge of the air outlet. A front partition plate having an upper end facing a substantially lower end of the fan, and a substantially cylindrical portion including left and right side plates extending above right and left edges of the outlet and connected to side ends of the fan. A fan casing provided with a suction hole at the center upper part of the front partition plate and at the upper part of the left and right side plates, and an arc-shaped arc-shaped member arranged to face the front panel in an air flow path from the suction port to the air outlet. A heat exchanger, and emptied from the suction hole through the heat exchanger. A cross-flow type fan arranged at the upper center of the fan casing for sucking air, and a centrifugal type fan having the same air volume and being coaxially arranged on both left and right sides of the once-through type fan. An indoor unit of an installation type air conditioner. 2. The corner-installed air conditioner indoor unit according to claim 1, wherein a drive motor for the centrifugal fan is disposed outside one of the left and right centrifugal fans. 3. A wind guide plate facing the outer rear edge of the centrifugal fan is disposed between the one centrifugal fan and the drive motor from one end on the leeward side of the heat exchanger. 3. The air flow guide plate according to claim 2, wherein a wind guide plate is provided so as to face the outer rear edge of the other centrifugal fan from the other end on the leeward side of the heat exchanger. An indoor unit for a corner-mounted air conditioner. 4. The indoor unit for a corner-installed air conditioner according to claim 1, wherein said once-through fans are provided on left and right sides, respectively. 5. The corner-installed air conditioner indoor unit according to claim 4, wherein a drive motor for the once-through fan is disposed between the left and right once-through fans. 6. A wind guide plate which is arranged from a vertical central portion on the leeward side of the heat exchanger to central front edges of the left and right through-flow fans, respectively. Or the indoor unit of the corner installation type air conditioner according to claim 5. 7. A wind guide plate, wherein air guide plates are respectively provided to face the outer rear edges of the left and right centrifugal fans from both ends on the leeward side of the heat exchanger. Item 7. An indoor unit for a corner-installed air conditioner according to Item 6. 8. The corner-installed air conditioner according to claim 1, wherein a diameter of the centrifugal fan is smaller than a diameter of the once-through fan and the air volume is the same. Indoor unit. 9. The corner-mounted air conditioner according to claim 1, wherein the width of the centrifugal fan is made smaller than the width of the once-through fan to make the air volume the same. Indoor unit. 10. The corner-installed air according to claim 1, wherein the number of blades of the centrifugal fan is smaller than the number of blades of the once-through fan so that the air volume is the same. Harmonic unit indoor unit. 11. A blade mounting angle of the centrifugal fan,
The indoor unit of a corner-installed air conditioner according to claim 1, wherein the air flow rate is made the same by making the blade mounting angle of the once-through fan larger.