JPH0198838A - Air blower device - Google Patents

Abstract

PURPOSE:To uniformize air delivered from a fan approximately throughout the whole of a delivery port and to increase an amount of air delivered, by a method wherein a baffle plate is situated in a position, where it is displaced from the plate of the blade of a fan, to a scroll plate on the delivery side of a cross fan. CONSTITUTION:Ten baffle plates 32 are laterally aligned to a scroll plate 30 on the delivery side, with which a part of a casing 31 of a cross fan 5 is formed. All of the ten baffle plates 32 are individually situated approximately in the middle between adjoining plates 34 and the plate and an end plate 35, namely, the baffle plate 32 is situated in a position where it is displaced from the plate 34. By arranging the baffle plates 32 in a manner described above, component of velocity distribution at a discharge port 36 is uniformized.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a blower device having a cross-flow fan.

(b) Prior Art An example of the structure of an air conditioner using a cross flow fan is Japanese Utility Model Publication No. 58-48976.

The content is that a reinforcing glue is provided on the scroll plate that guides the discharge air of the cross flow fan so as to face the connection plate of the blades of the fan.

In this way, the lip is provided at a position facing the connecting plate of the fan blades, so that the air blowing characteristics are not deteriorated by the lip.

(c) Problems to be solved by the invention In such an air conditioner, the wind speed in front of the lips (discharge port side) is more extreme than the wind speed distribution in other parts (in front of the part without lips). There was a problem in that the air velocity distribution at the outlet was not made uniform, resulting in a decrease in the amount of air discharged from the outlet.

The present invention aims to equalize the wind speed distribution at the outlet and increase the discharge air volume.

(d) Means for Solving the Problems In order to achieve this object, the present invention provides a scroll plate for guiding the discharged air of a cross-flow fan, which has a rectifier plate at a position deviated from the plate for connecting the blades of the fan. It is arranged so that

(E) Effect Since the baffle plate is shifted from the plate of the blade of the cross-flow fan, the distribution of the air discharged from the fan is made uniform over almost the entire outlet by the baffle plate.

(f) Embodiment FIG. 1 is an exploded perspective view of an indoor unit of a separate air conditioner showing an embodiment of the present invention, and the exterior body of this unit 1 is as follows:
It is composed of a main body 2, an exterior cover 3 attached to the front surface of the main body 2, and a decorative board 4 attached to the cover 3.

Reference numeral 5 denotes a cross-flow fan housed in the main body 2, 6 a motor for driving this fan, 7 a first bearing for receiving a non-driving shaft of this cross-flow fan, 8 a rubber cover for this bearing, A bearing 7 can be attached. Reference numerals 9 and 10 are second and third bearings that receive the shafts at both ends of the motor 6. Then, this first bearing 7 is attached to the main body 2.
The second and third bearings 9 and 10 are fitted into the U-shaped groove 12 of the main body 2, and the second and third bearings 9 and 10 are inserted into the hole 11 of the main body 2 using the bearing valve fitting 13. Fixed to.

Reference numeral 14 denotes an indoor heat exchanger, and both ends 15 of the indoor heat exchanger are fixed to left and right rising pieces 16 of the main body 2. Reference numeral 17 denotes an electrical equipment box, in which electrical parts (not shown) are stored, and is placed in the electrical equipment compartment 18 of the main body 2.
will be installed on the

A drain pan 19 is arranged below the indoor heat exchanger 14. A blow-off frame 20 is integrally molded in the lower part of the drain pan 19. Reference numeral 21 denotes a support piece discharged forward from the blow-off frame 20, to which a horizontal blade (not shown in FIG. 1) is attached.

A total of 12 ventilation holes 22 are formed on the front surface of the exterior cover 3, two in the vertical direction and six in the horizontal direction. and,
The decorative board 4 is attached to the external cover 3 so that space for inserting the air filter 23 is secured between the front surface of the external cover 3 and the back surface of the decorative board 4. This decorative board 4 is provided with a horizontally elongated suction port (omitted in FIG. 1).

In this FIG. 1, 30 is a discharge side scroll plate that constitutes a part of the casing 31 of the cross flow fan 5;
This plate 30 has ten arcuate rectifying plates 32 arranged in the horizontal direction. The relationship between the ten arcuate current plates 32 and the plate 34 connecting the blades 33 of the cross flow fan 5 is shown in FIG. That is, FIG. 3 is an explanatory diagram showing the relationship between the casing 31 and the cross-flow fan 5, and the ten rectifying plates 32 are located approximately in the middle between adjacent plates 34 and end plates 35, that is, The current plate 32 is arranged at a position shifted from the plate 34. Here, the width A of the casing 31, the width of the cross flow fan 5, and the width of the air outlet 36 are made to substantially match.

By arranging the current plate 32 in this manner, the minute velocity distribution at the outlet 26 was made uniform as shown below the outlet 26 in FIG. This is thought to be because the rectifying plate 32 distributes the strong discharge flow between the plates 34 of the fan 5 to the left and right.

On the other hand, FIG. 4 shows an example in which the rectifying plate 32 is aligned with the plate 34 of the fan 5, and FIG. 5 shows an example in which the rectifying plate 32 itself is not provided on the scroll plate 30. From these figures, in the example where the rectifying plate 32 is not provided (see Fig. 5)
, the wind speed is strong at both ends 37 of the outlet 26 (and the strength of the wind speed is not constant in other parts. On the other hand, in an example where the plate 34 of the fan 5 and the rectifier plate 32 are matched ( (See Figure 4), the wind speed is weak in the leeward part 38 of the baffle plate 32 (and strong in the other parts 39, making the overall wind speed distribution wavy. The table below shows the air volume and noise in the three examples mentioned above. It shows the value, high-frequency sound, and fan rotation speed.

From this table, according to the present invention, the highest air volume was obtained even if the fan rotation speed was lower than in the other two examples. This is considered to be because the wind speed of the blower outlet 26 in the device of the present invention was made uniform throughout compared to the other two examples.

Figures 6 and 7 are diagrams showing the frequency analysis of noise in the three examples mentioned above, respectively. Figure 6 is an example of the present invention, Figure 7 is an example where the rectifying plate is aligned with the plate, and Figure 8 is an example of the noise frequency analysis of the three examples described above. Figures 1 and 2 show examples without a rectifying plate, and the high-frequency sound was approximately concave in all examples.

In the above embodiment, it is thought that if the rectifying plate 32 is further enlarged (dotted chain line in FIG. 2) and the edge of the rectifying plate 32 is brought closer to the cross flow fan 5, the blower characteristics will be improved. There is a risk that the current plate 32 may hit the cross flow fan 5 due to vibrations during transportation of the air conditioner, so the current plate 32 is shaped as in the embodiment.

(G) Effects of the Invention As described above, in the present invention, a rectifying plate is provided on the discharge side scroll plate of the cross flow fan at a position offset from the fan blade plate, so that the air discharged from this fan is The discharge air volume is made uniform over almost the entire discharge port of the casing, and the discharge air volume can be increased as a whole.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an indoor unit of an air conditioner showing an embodiment of the present invention, Fig. 2 is a sectional view of essential parts of this indoor unit, and Fig. 3 is a cross-flow fan and rectifier plate of this indoor unit. 4 and 5 are explanatory diagrams showing the relationship between a conventional cross flow fan and a rectifier plate, and FIGS. 6 to 8 are diagrams 3 to 5, respectively. FIG. 3 is a diagram showing a frequency analysis of noise of an air blower having a relationship between a cross flow fan and a rectifying plate. 5... Cross flow fan, 30... Scroll plate, 32... Rectifier plate, 33... Vane, 34
···plate.

Claims (1)

[Claims] 1) In an air blower equipped with a cross-flow fan in which a large number of blades are connected by plates, and a scroll plate that guides air discharged from the fan, the scroll plate is provided with a rectifying plate at a position offset from the plate. A blower device characterized by: