JPH05231667A - Indoor unit of air conditioner - Google Patents

Abstract

PURPOSE:To obtain a fixed ventilation efficiency by forming a protrusion to a face opposed to a cross flow fan of a tongue portion of a stabilizer. CONSTITUTION:An air passage 9 composed of a rear guider 7 and a stabilizer 8 is formed between an outlet 5 and an intake 6. The upper portion of the stabilizer 8 is a drain pan 14 for receiving defrosting water flowing down from a heat exchanger 9. A tongue portion 15 turned upward is formed on one side to the cross flow fan 12 so as to be opposed to the cross flow fan 12. Moreover, an angled protrusion 19 is provided at the center between right and left sides of the tongue portion 15. Thereby, a fixed ventilation efficiency can be obtained because a dimensional change between the top of the protrusion and the cross flow fan does not occur even if an attaching position of the stabilizer is a little out of position.

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 an air conditioner equipped with a cross flow fan, and more specifically, a means for preventing a decrease in ventilation efficiency due to variations in the assembly of the indoor unit. Regarding

[0002]

2. Description of the Related Art In an indoor unit of an air conditioner, for example, as shown in FIG. 1, an air filter is provided in an air passage 9 connecting an intake port 5 at an upper part of a main body 1 and an outlet port 6 at a lower part thereof.
10, a heat exchanger 11, and a cross flow fan 12 facing the heat exchanger 11 are arranged. The cross flow fan 12 includes a plurality of circular support members 17 arranged at predetermined intervals around a rotation shaft 16, and a plurality of blades (blades) 18 arranged in the circumferential direction of the support member 17. It is composed by. The cross flow fan 12 is driven by an electric motor (not shown), but a rear guider 7 is provided at the rear and a stabilizer 8 having a tongue portion 15 is provided at the front in order to enhance the blowing efficiency. The upper portion of the stabilizer 8 is a drain pan (water receiving tray) 14 for receiving defrosting water flowing down from the heat exchanger 11.

[0003]

By the way, in the indoor unit as described above, a gap (front gap) between the cross flow fan 12 and the tongue portion 15 of the stabilizer 8 is formed.
It is known that the size of the air blow has a great influence on the ventilation efficiency and noise. When the cross-flow fan 12 rotates, the air that has undergone heat exchange by the heat exchanger 11 is blown into the room from the air outlet 6, and at that time, the tongue portion 15 of the stabilizer 8 forming the ceiling side of the air outlet 6 A part of the wind blown from the cross flow fan 12 collides and is sucked into the cross flow fan 12 again, and a large concentric circle eccentric to the cross flow fan 12 is provided at the blowing portion of the cross flow fan 12. A vortex is formed. When each blade (blade) 18 cuts this vortex flow, a pressure fluctuation is generated there and a noise called blade pitch sound is generated. This kind of noise is related to the size of the gap between the cross flow fan 12 and the tongue portion 15 of the stabilizer 8. There is a problem that if the gap is increased, the noise will be reduced but the ventilation efficiency will be reduced. If this is done, there is a problem in that the air blowing efficiency will increase, but the noise will also increase. However, in mass-producing the indoor unit, it is difficult to make the gap between the stabilizer 8 and the cross flow fan 12 uniform because of variations in parts shape and assembly, and depending on the mounting state of the stabilizer 8, the tongue There is a problem that 15 moves slightly up and down, and a gap with the cross flow fan 12 also varies, so that a predetermined blowing efficiency cannot be obtained. Therefore, it is an object of the present invention to provide an indoor unit of an air conditioner that solves these problems.

[0004]

The present invention has been made to solve the above-mentioned problems, and is arranged in an air passage that connects a main body and a suction port at the upper part of the main body with a blow-out port at the lower part. A heat exchanger, a cross flow fan arranged to face the back side of the heat exchanger, a drain pan provided downstream of the heat exchanger, and a drain pan provided integrally with the drain pan and close to the cross flow fan. The stabilizer is disposed in such a manner that a protrusion is formed on the surface of the tongue of the stabilizer facing the cross flow fan.

[0005]

With the above structure, since there are protrusions on the surface of the tongue of the stabilizer where the circumferential surfaces of the crossflow fan face each other, even if the mounting position of the stabilizer is slightly displaced,
It is possible to minimize changes in the gap between the circumferential surface of the cross flow fan and the stabilizer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram showing the internal structure of an indoor unit. A housing 1 is composed of a main body 2 and a front cover 3 that is detachably attached to the main body 2. A front panel 4 whose upper portion is rotatably supported is attached. A suction port 5 for sucking air in the room is provided in the front panel 4 and the upper part of the housing 1, and a blowout port 6 is formed in the lower front part. Suction port 5
An air passage 9 composed of a rear guider 7, a stabilizer 8 and the like is formed between the air outlet 9 and the air outlet 6.
A removable air filter 10 that can be moved to the main body 2 side above the front cover 3 along the inner surface of the front cover 3.
, A heat exchanger 11 divided into three, and a cross flow fan 12
Are arranged, and the air that has undergone heat exchange by the heat exchanger 11 is sent to the outlet 6 by the crossflow fan 12, and the wind direction into the room is adjusted by the wind direction plate 13.
In addition, the upper part of the stabilizer 8 is a drain pan 14 for receiving defrosting water flowing down from the heat exchanger 9, and the one side near the crossflow fan 12 is opposed to the crossflow fan 12 and folded back to the upper part. A tongue portion 15 is formed.

FIG. 2 is a perspective view showing the relationship among the cross flow fan 12, the rear guider 7, and the stabilizer 8.
The cross-flow fan 12 includes a rotary shaft 16 fitted to a rotary shaft of an electric motor (not shown), circular support members 17 arranged at predetermined intervals in the axial direction of the rotary shaft 16, and these support members.
It is composed of a plurality of blades 18 annularly arranged between 17 and 17, and is provided so as to face the rear guider 7 and the tongue portion 15 of the stabilizer 8 at a predetermined interval. Since the rear guider 7 is formed integrally with the main body 2, the clearance between the rear guider 7 and the cross flow fan 12 is naturally determined, but the stabilizer 8
Is formed separately and then mounted in place,
The positional relationship between the tongue portion 15 and the cross flow fan 12 is likely to be deviated, and the gap between the two is varied. Therefore, in this embodiment, as shown in FIGS. 2 and 3, a protrusion 19 having a mountain shape is provided between the center and the left and right of the tongue portion 15. The central portion of the tongue portion 15 provided with the protrusion 19 is a position where the gap with the cross flow fan 12 does not change much even if the mounting position of the stabilizer 8 is shifted and is shown by the broken line. Therefore, if the protrusion 19 having the mountain shape as shown in this figure is provided at this position, the gap between the crossflow fan 12 and the crossflow fan 12 can be made substantially uniform even if the mounting state of the stabilizer 8 is further changed.

[0008]

As described above, if the protrusions described above are provided on the tongue of the stabilizer, even if there is some variation in the mounting position of the stabilizer, a large dimensional change occurs between the top of the protrusion and the cross flow fan. Since it does not occur, a predetermined ventilation efficiency can be obtained, and an indoor unit with stable quality can be provided.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part of an indoor unit according to the present invention and a conventional example.

FIG. 2 is a perspective view of an essential part showing an embodiment of the present invention.

FIG. 3 is an enlarged side sectional view of an essential part showing an embodiment of the present invention.

[Explanation of symbols]

 7 Rear guider 8 Stabilizer 9 Air passage 12 Cross flow fan 15 Tongue 16 Rotating shaft 17 Circular support member 18 Blade 19 Protrusion

Claims (1)

[Claims] 1. A main body, a heat exchanger arranged in an air passage connecting a suction port in the upper part of the main body and a blowout port in the lower part, and a crossflow arranged to face the back side of the heat exchanger. A fan, a drain pan provided downstream of the heat exchanger, and a stabilizer provided integrally with the drain pan and arranged in the vicinity of the crossflow fan, and the crossflow fan at the tongue portion of the stabilizer is connected to the crossflow fan. An indoor unit for an air conditioner, characterized in that protrusions are formed on opposite surfaces.