JP3087876B2 - Outdoor unit of air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner, and more particularly, to a structure of an outdoor unit for preventing bounce of air from an outlet.

[0002]

2. Description of the Related Art An outdoor unit of an air conditioner has a structure as shown in FIG. 5, for example. The inside of a main body 21 is divided into a heat exchange room 23 and a machine room 24 by a partition plate 22 erected on a base. And a heat exchanger 25 and an axial fan
A compressor 27 is provided in the machine room 24, and the compressor 27
(Not shown) and the like for controlling the power supply are arranged.
An annular bell mouth 28 is provided on the outer periphery of the axial fan 26, and a ventilation grill 29 is attached to the front surface of the outlet.
When the axial fan 26 rotates by driving the fan motor 30 in the outdoor unit configured as described above, external air is sucked into the main body 21 from the direction A, and heat is exchanged by the heat exchanger 25. Along the axis of rotation of the flow fan 26, it goes to the outlet, passes through the ventilation grill 29, and exits outside.However, in the conventional outdoor unit, the axial flow fan
26 hub 31 has its front edge outer diameter (outer diameter of fan motor 30 side)
And the outer diameter of the trailing edge (outer diameter on the outlet side) is formed in a cylindrical shape with a bottom, and the bell mouth 28 side is also a simple cylindrical shape parallel to the peripheral surface of the hub 31 except for the air inlet side. Was formed. Further, the bar 29a of the ventilation grill 29 is also formed parallel to the front.

[0003]

However, in recent years, restrictions on the installation location of the outdoor unit have increased due to housing conditions.
Even in a place where there is not a sufficient gap between the outlet of the outdoor unit and the wall surface of the adjacent house, the outdoor unit as described above may need to be installed. In such a place, the blown air flow hits the wall of the neighbor and bounces back, etc., resulting in deterioration of the ventilation performance, the heat exchange capacity of the outdoor unit was reduced, and the wall of the neighbor was dirty due to the effect of the blown air flow. . In addition, since the conventional ventilation grill has a structure in which the interior of the outdoor unit can be easily seen, there is also an external problem that it cannot be harmonized with the building. Therefore, an object of the present invention is to provide an outdoor unit of an air conditioner that can solve these problems.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a partition plate is erected inside a main body to be divided into a heat exchange room and a machine room. A heat exchanger and an axial fan, a compressor and its control device in a machine room, an annular bell mouth is provided on the outer periphery of the axial fan, and a ventilation grill is provided on the front surface of the outlet. In the outdoor unit of the air conditioner, the rear edge of the hub of the axial fan is larger than the front edge to form a slope between the front and rear of the hub peripheral surface. A parallel slope is formed on the outlet side of the bell mouth, and the bars of the ventilation grill are arranged vertically, horizontally or concentrically.
In addition, the front of each crosspiece is inclined left, right, up, down, or the outer peripheral direction with the center part as a boundary, and at least the left, right, upper, lower, or uppermost
The slope of the outer crosspiece was almost matched with the slope on the exit side of the bell mouth.

[0005]

With the above arrangement, the airflow from the inlet side to the outlet side of the air of the axial fan advances outward along the hub peripheral surface of the axial fan, and the airflow after passing through the axial fan is increased. Since the air flow is directed to the left and right diagonal direction or the vertical diagonal direction of the air outlet by the action of the bell mouth having an inclined surface on the outlet side and the ventilation grill with the crosspiece inclined in the horizontal direction or the vertical direction, Even if there is not a sufficient gap between the outlet and the wall of the building facing the outlet, the blown airflow can be released far away.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the interior of the outdoor unit from above, and 1 is a main body. The interior of the main body 1 is partitioned into a heat exchange chamber 3 and a machine chamber 4 by a partition plate 2 erected on a base, and a heat exchanger 5 and an axial fan 6 are arranged in the heat exchange chamber 3. In the machine room 4, a compressor 7 and a control device (not shown) for controlling the compressor 7 are arranged. An annular bell mouth 8 is provided on the outer periphery of the axial flow fan 6, and the bell mouth 8 is provided with a ventilation grill 9
It is designed to be fixed to the back surface of the. The axial fan 6 comprises a hub 11 attached to a rotating shaft of a fan motor 10 and a plurality of blades projecting radially from the peripheral surface of the hub 11 at predetermined intervals. When the axial fan 6 is rotated by the drive of 10, the external air is sucked into the main body 1 from the direction A, and the heat is exchanged by the heat exchanger 5, and then passes between the blades of the axial fan 6, and The air flow is divided right and left by a bar 9a of the ventilation grill 9 and the like, and is directed to the left and right direction in front of the main body.

Hereinafter, the shape of the axial fan 6, the shape of the bell mouth 8, and the shape of the ventilation grill 9 which are particularly relevant to the present invention will be described. The hub 11 of the axial fan 6 has a truncated cone shape having a rear edge outer diameter (outside diameter on the air outlet side) larger than a front edge outer diameter (outside diameter on the air inlet side), and has a circumferential surface that is front and rear. Inclined between. When the peripheral surface of the hub 11 is thus inclined, the airflow on the peripheral surface is directed outward. On the other hand, the diameter of the bell mouth 8 on the outlet side is larger than the diameter near the rear end portion 6a of the blade of the axial fan 6 and
In the meantime, the slope 8a parallel to the slope 11a of the hub 11 is formed, so that the airflow toward the outlet side is directed obliquely outward. In the present embodiment, the bar 9a of the ventilation grill 9 is
Are arranged vertically, and the front of each bar 9a is inclined left and right with the center of the array (center of the outlet) as a border, and the slopes 9b of the bars 9a at both left and right sides are bellmouthed as shown in FIG. 8, the air flow from the axial fan 6 can be directed obliquely forward of the outlet.

In this embodiment, the inclination angle of the hub 11 of the axial flow fan 6 described above, the inclination angle of the outlet of the bell mouth 8 and the inclination angle of the bar 9a of the ventilation grill 9 are made substantially the same. The airflow does not become turbulent inside. The radial blade section of the axial fan 6 is inclined at the leading edge side toward the wind inlet side as shown in FIG. 3A, and at the trailing edge side as shown in FIG. 3B as the wind outlet side. As shown in FIG. 4, the blade section in the circumferential direction is inclined toward the inlet side of the wind at the leading edge side, and is inclined toward the outlet side of the wind at the trailing edge side. Delivery is performed efficiently. In the present embodiment, the inclination angles of the bars 9a of the ventilation grill 9 are all the same. However, it is not always necessary to do so. The width of the airflow is widened, and the blown airflow can escape farther. Further, the bars 9a of the ventilation grill 9 are not limited to the vertical arrangement as in the present embodiment, but may be a horizontal arrangement or a concentric arrangement. In any case, if each of the bars 9a is inclined outward, the same as the embodiment. Similar effects can be obtained.

[0009]

According to the structure described above, since the blowout air flows obliquely forward from the outlet, even if the gap with the neighbor is narrow, the wall surface of the neighbor does not become dirty with the blowout airflow. Since the blown air does not bounce to the outdoor unit side, the blowing performance is improved and the heat exchange capacity is also improved. Also,
Since the cross section of the ventilation grill is inclined and the interior of the outdoor unit cannot be seen from the front, the appearance is good and it is easy to take harmony with the building.

[Brief description of the drawings]

FIG. 1 is an internal configuration diagram of an outdoor unit showing one embodiment of the present invention.

FIG. 2 shows an axial fan according to the present invention, a bell mouth,
It is a principal part expanded sectional view which shows the relationship of a ventilation grill.

FIG. 3 is an explanatory view of a blade cross-sectional shape in the radial direction of the axial fan according to the present invention.

FIG. 4 is an explanatory view of a blade cross-sectional shape in the circumferential direction of the axial fan according to the present invention.

FIG. 5 is an internal configuration diagram of an outdoor unit showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 6 Axial fan 8 Bell mouth 8a Slope 9 Ventilation grill 9a Bar 9b Slope 10 Fan motor 11 Hub 11a Slope

Claims (5)

(57) [Claims] 1. A partition plate is erected inside a main body and divided into a heat exchange room and a machine room. A heat exchanger and an axial fan are provided in the heat exchange room, and a compressor and its control device are provided in the machine room. Arranged, while providing an annular bell mouth on the outer periphery of the axial flow fan,
In an outdoor unit of an air conditioner provided with a ventilation grill in front of an outlet, an outer diameter of a rear edge of a hub of the axial fan is made larger than an outer diameter of a front edge to form a slope between front and rear of a hub peripheral surface. At the same time, a slope substantially parallel to the slope of the peripheral surface of the hub is formed on the outlet side of the bell mouth, and the bars of the ventilation grill are arranged vertically or horizontally, and the center of the arrangement is a boundary. An outdoor unit of an air conditioner, characterized in that the front of the crosspiece is inclined in the left-right or vertical direction, and at least the slopes of the left and right ends or the upper and lower ends are substantially aligned with the slope on the outlet side of the bellmouth. 2. A partition plate is erected inside the main body to divide it into a heat exchange room and a machine room, and a heat exchanger and an axial fan are installed in the heat exchange room, and a compressor and its control device are installed in the machine room. Arranged, while providing an annular bell mouth on the outer periphery of the axial flow fan,
In an outdoor unit of an air conditioner provided with a ventilation grill in front of an outlet, an outer diameter of a rear edge of a hub of the axial fan is made larger than an outer diameter of a front edge to form a slope between front and rear of a hub peripheral surface. At the same time, a slope approximately parallel to the slope of the peripheral surface of the hub is formed on the outlet side of the bell mouth, and the bars of the ventilation grill are formed concentrically, and the front of each bar is inclined outwardly. An outdoor unit for an air conditioner, characterized in that at least the slope of the outermost crosspiece is substantially aligned with the slope on the outlet side of the bellmouth. 3. The air conditioner according to claim 1, wherein a cross section of the blade of the axial flow fan in a radial direction is inclined at a leading edge toward a wind inlet and at a trailing edge toward a wind outlet. Outdoor unit. 4. The air according to claim 1, wherein the blade section in the circumferential direction of the axial flow fan is inclined at the leading edge toward the wind inlet and at the trailing edge toward the wind outlet. An outdoor unit of a harmonic machine. 5. The outdoor unit of an air conditioner according to claim 1, wherein the slope on the outlet side of the bell mouth is formed from near the rear end of the blade of the axial fan to the outlet side.