JPH0674478A - Air-conditioner - Google Patents

Abstract

PURPOSE:To provide an air-conditioner with an indoor unit which embodies a higher fan efficiency of a lateral fan. CONSTITUTION:In the air conditioner, as a space provided between a side end plate 25 of a lateral fan through which air flows and a recessed part 30 defined by a fan case 28 and a fan cover 29 is formed to get narrower on the upstream side than on the downstream side, no part in which air flowing there stays is formed in the space between the side end plate 25 of the lateral fan 24 and the recessed part 30. Therefore, the air entering the space does not stay within the space from the upstream side toward the wider downstream side, but it is discharged smoothly to the downstream side. Thus, as the flowing of the air entering the space is very smooth, a higher fan efficiency can be embodied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which an indoor heat exchanger and an outdoor heat exchanger are provided separately in an indoor unit and an outdoor unit, respectively.

[0002]

As is well known, in an air conditioner in which an indoor unit has an indoor heat exchanger and an outdoor unit has an outdoor heat exchanger and a compressor, heat exchange by the indoor heat exchanger is performed in the indoor unit. A cross-flow fan is provided for the purpose of promotion, and its ventilation path is provided so as to intersect with the indoor heat exchanger.

A conventional example will be described below with reference to FIGS. 3 and 4. 3 is a schematic vertical cross-sectional view of the indoor unit, and FIG. 4 is a schematic horizontal cross-sectional view of a main part.

In the figure, reference numeral 1 denotes an indoor unit, a main body case 2 thereof is formed into a substantially rectangular parallelepiped shape, a front panel 3 is provided on a front portion thereof, and indoor air is sucked into an upper side of the front panel 3. The mouth 4 is opened, and the conditioned air outlet 5 is opened on the lower side. The inlet 4 is provided with a filter (not shown), and the outlet 5 is provided with a louver 6 for adjusting the wind direction. There is.

A rear plate casing 7 is provided on the rear side of the main body case 2, and a side casing 8 is provided on the side of the main body case 2. The ventilation passage extending from the suction port 4 to the discharge port 5 of the front panel 3 is provided. 9 is formed. An indoor heat exchanger 10 is inclinedly arranged in the ventilation passage 9 so as to close the suction port 4 side, and a drain pan nose 11 is provided below the inclined lower end of the indoor heat exchanger 10. Further, an arrow A is provided between the indoor heat exchanger 10 of the ventilation passage 9 and the outlet 5.
A cross-flow fan 12 in which a plurality of blades are arrayed in the circumferential direction to circulate indoor air sucked in a predetermined direction by passing through the indoor heat exchanger 10 and send the conditioned air into the room.
Are arranged.

The cross flow fan 12 is pivotally supported on a side portion of the main body case 2 by a fan bearing 13. In order to make the cross-flow fan 12 function effectively, the side part of the cross-flow fan 12 is formed by a fan case 14 integrally formed in the side casing 8 in a concave shape and a fan cover 15 arranged so as to cover the front part. The cross-flow fan 12 is installed in the ventilation passage 9 with a space provided in the recessed portion 16.
The sides of the are not placed. And, the concave portion 1 facing the side end plate 17 forming the side end surface of the cross flow fan 12
The bottom surface of 6 is a flat surface.

Then, the air conditioner is operated to operate the cross flow fan 1
When 2 is rotated, the air in the ventilation passage 9 is smoothly sent out to the downstream side by the blades of the cross flow fan 12, whereby the conditioned air is blown out into the room from the outlet 5.

However, in the above prior art,
On the side portion of the cross-flow fan 12, the air on the upstream side is supplied to the outer periphery of the cross-flow fan 12, the fan case 14, and the fan cover 15.
From the upstream gap formed between the recess 16 and
Flow through the gap between the side end plate 17 of the cross-flow fan 12 and the bottom surface of the recess 16 and further from the downstream gap formed between the outer periphery of the cross-flow fan 12 and the recess 16 to the downstream outlet 5. become.

When the upstream air flows into the upstream gap between the outer periphery of the cross flow fan 12 and the concave portion 16, the direction B of the air flowing into the gap collides with the bottom surface of the concave portion B and changes. Turbulence is generated in the cross flow fan 12 and hinders the smooth flow of air flowing through the side parts of the cross flow fan 12.
It was difficult to increase the ventilation efficiency of the.

[0010]

SUMMARY OF THE INVENTION As described above, conventionally,
During operation, turbulence occurs in the flow of air that has flowed into the gap formed between the side portion and the recess of the cross-flow fan provided in the indoor unit, and a smooth flow of air is obstructed to obtain high blowing efficiency. Was difficult. The present invention has been made in view of such a situation, and an object of the present invention is to make the flow of air flowing into a gap formed between a side portion of a cross-flow fan and a concave portion smooth, An object of the present invention is to provide an air conditioner including an indoor unit that realizes ventilation efficiency.

[0011]

The air conditioner of the present invention comprises:
An air passage is formed inside the main body case, and an indoor heat exchanger and a cross flow fan are arranged so as to cross the air passage,
In an air conditioner including an indoor unit in which a side portion of the cross-flow fan is covered with a recess, a gap formed by the side end surface of the cross-flow fan and the recess is narrower on the upstream side than on the downstream side. It is characterized by being formed.

[0012]

In the air conditioner configured as described above, the gap formed by the side end surface of the cross-flow fan through which the air flows and the concave portion is formed such that the upstream side is narrower than the downstream side. Therefore, the gap between the side end surface of the cross-flow fan and the concave portion does not have a portion where the flowed-in air is stagnant, and the air that has entered the gap is stagnant in the gap from the upstream side to the wider downstream side. And is smoothly discharged to the downstream side. Since the air flowing into the gap is smooth as described above, higher air blowing efficiency can be realized.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the configuration and the like similar to the conventional example are not shown, and the description thereof is omitted.

First, a first embodiment will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of a main part of an indoor unit.
In the figure, 21 is a rear plate casing provided on the rear side of the main body case of the indoor unit, and 22 is a side casing provided on the side. And a front panel (not shown) provided with an inlet and an outlet (not shown),
An air passage 23 is formed by the rear plate casing 21 and the side casing 22. Further, an indoor heat exchanger (not shown) is arranged in the ventilation passage 23, and the indoor air sucked from the suction port is conditioned by passing through the indoor heat exchanger, and the conditioned air is sent to the room through the cross flow. A fan 24 is arranged.

The cross flow fan 24 is pivotally supported by a fan bearing 27 attached to the side casing 22 by a rotary shaft 26 fixed to a side end plate 25 having a large number of blades attached to the outer periphery and forming a side end surface. There is. At the same time, the side portion of the cross flow fan 24 is provided with a gap in a concave portion 30 formed by a fan case 28 integrally formed in the side casing 22 in a concave shape and a fan cover 29 arranged so as to cover the front side portion. Have been paid.

The depth of the bottom surface of the fan case 28 and the bottom surface of the fan cover 29 at the bottom surface of the recess 30 facing the side end plate 25 of the cross flow fan 24 is different, and the fan cover is located upstream of the air flowing therethrough. 29 is shallower and not in the same plane. That is, the recess 30 and the cross flow fan 2
The gap with the side portion 4 is narrow on the upstream side where the air flows in and wide on the downstream side where the air flows out.

In this embodiment thus constructed, when the air conditioner is operated and the cross flow fan 24 is rotated, the air in the ventilation passage 23 is smoothly sent out to the downstream side by the blades of the cross flow fan 24. As a result, the conditioned air is blown into the room from the outlet.

At the same time, also on the side of the cross flow fan 24, from the fan cover 29 side of the recess 30 which is the upstream side,
The air that has flowed into the gap between the outer periphery of the cross-flow fan 24 and the recess 30 passes through the gap between the side end plate 25 of the cross-flow fan 24 and the bottom surface of the recess 30, and further between the outer periphery of the cross-flow fan 24 and the recess 30. Fan case 2 which is the downstream side formed between
It will flow from the gap on the 8 side to the outlet on the downstream side.

At this time, the bottom surface of the recess 30 facing the side end plate 25 of the cross flow fan 24 is the fan cover 2 on the upstream side.
Shallow on the 9 side, deep on the downstream fan case 28 side,
Since the flow path cross-sectional area is larger on the downstream side, the air flowing into the gap of the recess 30 flows smoothly without being stagnant midway and becoming a turbulent flow. As a result, the blowing efficiency of the cross flow fan 24 becomes higher.

Next, a second embodiment will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view of the main part of the indoor unit.
In the figure, 31 is a fan cover, and the side portion of the cross flow fan 24 is the side casing 2 as in the first embodiment.
The fan case 28, which is formed in a concave shape in 2, and the fan cover 31, which is arranged in the front portion, are housed in a recess 32 formed with a gap.

The side wall 33 forming the recess 32 of the fan cover 31 is inclined, and the bottom of the recess 32 facing the side end plate 25 of the cross flow fan 24 is deep at the bottom of the fan case 28. The depth of the fan cover 31 is continuously reduced. That is, the fan cover 31 on the upstream side of the flowing air is shallower and does not have the same plane. Therefore, the recess 3
The gap between the second end plate 25 and the side end plate 25 of the cross-flow fan 24 is narrow on the upstream side where the air flows in and wide on the downstream side where the air flows out.

With this structure, the same effects as those of the first embodiment can be obtained in this embodiment.

In each of the above embodiments, the fan covers 29 and 31 are provided on the upstream side, but the present invention is not limited to this, and the recesses 30 and 32 and the cross flow fan 2 are provided.
The means for changing the gap with the side portion of No. 4 is not limited to the one described above, and can be implemented by appropriately changing it without departing from the scope of the invention.

[0024]

As is apparent from the above description, according to the present invention, the gap formed by the side end surface of the cross flow fan through which the air flows and the recess is narrower on the upstream side than on the downstream side. With such a configuration, the flow of the air flowing into the gap becomes smooth, and the effect of achieving higher ventilation efficiency can be obtained.

[Brief description of drawings]

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

FIG. 2 is a schematic horizontal cross-sectional view of a main part of an indoor unit according to a second embodiment of the present invention.

FIG. 3 is a schematic vertical sectional view showing a conventional indoor unit.

FIG. 4 is a schematic cross-sectional view of a main part in the above.

[Explanation of symbols]

 24 ... Cross Flow Fan 25 ... Side End Plate 28 ... Fan Case 29 ... Fan Cover 30 ... Recess

Claims (1)

[Claims] 1. An indoor unit in which a ventilation passage is formed inside a main body case, an indoor heat exchanger and a cross-flow fan are arranged so as to cross the ventilation passage, and side portions of the cross-flow fan are covered with recesses. An air conditioner comprising: a side end surface of the cross-flow fan and the recess formed so that a gap between the upstream side and the downstream side is narrower.