JP2001336779A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner which can reduce turbulence and prevent performance drop and noise increase by optimizing the relation between the thickness width of an air duct and the width of the passage of an air duct discharge port. SOLUTION: One side of the body case 2 is provided with a main body suction port, and the other side is provided with a main body discharge port. This air cleaner is provided with one or plural spiral air ducts made of wall faces projected from the inner face of the main body case 2. The air duct has an air duct suction port and an air duct discharge port. A blast part for sending air has a motor for drive and one or plural multivane fans where the thickness width W of the air duct installed on the same bearing within each air duct and the outside diameter D of each fan are in the relation of 0.55<D/W<0.70, and also the fun suction port of each multi-vane fan is close to the air suction port. This air cleaner is provided with a filter which purifies the air to be sucked in the blast part, between the air duct suction port and the main body suction port. In this air cleaner, the form of the air duct is made so that the thickness width W of the air duct and the width A of the air duct discharge passage may be in the relation of 0.15<A/W<0.27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air purifier for purifying air by collecting dust contained in indoor air and deodorizing odor.

[0002]

2. Description of the Related Art In a conventional air purifier for collecting and deodorizing dust and odor generated in a room of a home, a main body suction port is provided on one side of a main body case, and a main body discharge port is provided on the other side. One or a plurality of spiral wind tunnels formed by wall surfaces protruding from the inner surface of the main body case, each wind tunnel having a wind tunnel suction port and a wind tunnel discharge port, and a blower for sending air is provided by a drive motor. And one or more multi-blade fans (so-called sirocco fans) installed on the same axis in each wind tunnel, and the fan suction port of the multi-blade fan is arranged in proximity to the wind tunnel suction port, 2. Description of the Related Art There is known a filter provided with a filter for purifying air sucked by a blower between a wind tunnel inlet and a main body inlet.

[0003]

SUMMARY OF THE INVENTION In an air purifier for collecting and deodorizing dust and odor generated in a room at home as described above, the air sucked in by a blower is formed by a wind tunnel and a main body. The air is discharged from the main body outlet through an air purification filter between the air inlet and the air outlet.At that time, the wind tunnel outlet depends on the relationship between the thickness width of the wind tunnel and the flow path width of the wind tunnel outlet and the position of the multi-blade fan. A turbulent air flow may be generated in the vicinity, or if multiple multi-blade fans are installed on the same axis, the air flow between the fans may be mixed. However, there is a problem that performance is reduced and noise is increased.

The present invention has been made in view of the above description, and reduces turbulence by optimizing the relationship between the thickness width of the wind tunnel and the flow path width of the wind tunnel discharge port and the position of the multi-blade fan. Also, to provide an air purifier that has a structure in which a plurality of multi-blade fans are installed on the same axis, but can reduce a mixed flow in which the fans and the fans influence each other, and can prevent performance degradation and noise increase. As an issue.

[0005]

According to a first aspect of the present invention, there is provided an air purifier provided with a main body suction port on one surface and a main body discharge port on the other surface.
One or a plurality of spiral wind tunnels 9 formed by a wall surface 11 protruding from the inner surface of the main body case 2 are provided. The wind tunnel 9 has a wind tunnel inlet 13 and a wind tunnel discharge port 14, and a blower for sending air is provided. The drive motor 15, the wind tunnel thickness W installed on the same bearing in each wind tunnel 9, and the fan outer diameter D are set to 0.
55 <D / W <0.70 and one or more multi-blade fans 8, and the fan suction port of the multi-blade fan 8 is close to the wind tunnel suction port 13, In the air purifier provided with a filter for purifying air sucked into the blower between the air inlet and the main body inlet 10, the wind tunnel thickness width W and the wind tunnel outlet flow path width A are 0.15 <A / W <0. It is characterized in that a wind tunnel shape is formed so as to satisfy the relationship of 27. With the above configuration, the main body discharge port 12
The flow of air flowing out of the air outlet becomes linear, and the main body discharge port 12 generated when the tongue 20 starts to wind around the wind tunnel 9 is rolled up.
The turbulence in the vicinity can be reduced, and the noise value generated from the air purifier 1 can be reduced.

According to a second aspect of the present invention, in the first aspect, the center of the multi-blade fan 8 installed in the wind tunnel 9 is formed such that the center of the multi-blade fan 8 and the wall of the wind tunnel wall in the thickness width W of the wind tunnel. 0.70 <a / b <for the narrow side a and the wide side b
At the position of 0.78, in the vertical width V of the wind tunnel, the distance between the multi-blade fan 8 and the wall of the wind tunnel is 0.7 at the narrow side c and the wide side d.
The arrangement is such that 0 <c / d <0.80. With the above configuration, the air discharged from the multi-blade fan 8 starts to wind around the wind tunnel 9 and the tongue 2
Since the gas is smoothly discharged from the main body discharge port 12 without circulating again from the inside of the wind tunnel 9 from 0, loss and noise can be reduced.

The air purifier according to claim 3 of the present invention is characterized in that, in claim 1, the wall of the wind tunnel 9 from the tongue portion 20 to the wind tunnel outlet 14 and the wind tunnel from the tip of the tongue portion 20 to the wind tunnel outlet 14 are formed. The angle e of the straight line extending vertically to the straight line extends vertically from the center of the multi-blade fan 8 in the direction of the wind tunnel discharge port 14 and the straight line extending from the center of the multi-blade fan 8 to the start of the arc of the tongue 20. 0.30 <e for the angle f
/F<0.85. With the configuration described above, it is possible to reduce the separation of the flow downstream of the tongue portion 20 at the beginning of winding and the turbulent flow near the main body discharge port 12 and reduce the noise generated from the main body.

According to a fourth aspect of the present invention, in the first aspect, when two or more multi-blade fans 8 are installed on the same axis, the wind tunnel on the side of the opposed fan suction port. The width B between the suction ports 13 and the fan width L of the multi-blade fan 8 are B
/L>0.65. Mixing of air between the multi-blade fan 8 and the multi-blade fan 8 is reduced, and noise is reduced.

According to a fifth aspect of the present invention, in the first aspect, when two or more multi-blade fans 8 are installed on the same shaft, at least the opposed fan suction port side is provided. A bell mouth structure air introduction member 24 is provided in the wind tunnel inlet 13. With the above-described configuration, the flow of air to the fan suction port of the multi-blade fan 8 becomes smooth, and loss and noise are reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, an air purifier 1 includes a box-shaped main body case 2 having an open front surface, and a front case 3 and a back case 4. A main body suction port 10 is provided on each of the front and bottom surfaces of the main body case 2, and a main body discharge port 12 is provided on the top surface of the main body case 2.
A front opening above the main body suction port 10 on the front of the main body case is closed by the front cover 7.

As shown in FIG. 2, two spiral wind tunnels 9 formed by a wall surface 11 protruding from the front case 3 and the back case 4 are provided in the main body case 2. Each wind tunnel 9 has a wind tunnel inlet 13 and a wind tunnel outlet 14. In this example, the wind tunnel outlet 14 is the same as the main body outlet 12 as shown in FIG. The blower for sending air into the main body case 2 includes a drive motor 15 and two multi-blade fans 8 installed on the same axis in each wind tunnel 9. The multi-blade fan 8 is a so-called sirocco fan. The fan suction port of the multi-blade fan 8 is arranged close to the wind tunnel suction port 13.

A pre-filter 5 is provided between the main body suction port 10 and the wind tunnel suction port 13 in the main body case 2, an electrode block for electrically collecting dust, and a dust collecting filter for mechanically collecting dust. There is a plasma block 6 in which room air flows from the main body suction port 10 as shown by an arrow in FIG. 3, passes through the pre-filter 5 and the plasma block in order to be dedusted and deodorized, and passes through the blower. The purified air flows out of the main body discharge port 12.

Two multi-blade fans 8 installed on the same axis
Is connected to the rotating shaft 16 of the driving motor 15 by the coupling 17.
Are fixedly arranged side by side with respect to one shaft 18 which is connected through the wind turbine. A spiral wind tunnel 9 is formed so as to surround these two multi-blade fans 8, and the wind tunnel thickness width W
And the outer diameter D of the multi-blade fan 8 is 0.55 as shown in FIG.
<D / W <0.70. The tip of the shaft 18 is rotatably supported by the main body case 2 via a bearing 19.

The above-described wind tunnel thickness width W and multi-blade fan 8
In relation to the outer diameter D of the wind tunnel, a wind tunnel thickness width W, a wind tunnel exit flow path width A which is a distance between a wind start of the wind tunnel 9, a tip of the tongue 20, and a wall 21 from the wind wind end to the wind tunnel discharge port 14. Are configured so as to satisfy the relationship of 0.15 <A / W <0.27 as shown in FIG. By making this relationship, the flow of the air flowing out of the main body discharge port 12 becomes linear, and the turbulent flow near the main body discharge port 12 generated by entanglement of the tongue portion 20 at the beginning of winding is reduced. The generated noise value can be reduced.

FIG. 5 shows a difference in performance according to the relationship between the wind tunnel thickness width W and the wind tunnel exit passage width A according to the present invention. Here, the data when the width A of the wind tunnel exit passage in the multi-blade fan 8 having the outer diameter of 100.0 mm and the inner diameter of 87.0 mm is changed with respect to the wind tunnel thickness width W of 170.0 mm, and the horizontal axis is shown. Is the ratio of the wind tunnel thickness width W to the wind tunnel exit channel width A, and the vertical axis is the noise value. From this graph, it can be seen that the noise value is lowest when the value is between 0.15 <A / W <0.27 of the present invention.

As shown in FIG. 6, the center 22 of the multi-blade fan 8 installed in the wind tunnel 9 has a width 0 between the side a where the distance between the fan and the wall of the wind tunnel is small and the side b where the width is small. .70 <a / b <0.78, and the wind tunnel vertical width V
In the above, it is desirable that the fan and the wind tunnel wall are arranged at a position where a relationship of 0.70 <c / d <0.80 is satisfied between the narrow side c and the wide side d. By arranging the center 22 of the multi-blade fan 8 in such a positional relationship, the air discharged from the fan does not circulate from the tongue portion 20 to the wind tunnel 9 at the beginning of winding of the wind tunnel 9 and the main body smoothly. Since the ink is discharged from the discharge port 12, loss is reduced and noise is reduced.

FIG. 7 shows a difference in performance depending on the center position of the multi-blade fan 8 installed in the wind tunnel 9. Here, the data when the center position of the multi-blade fan 8 having the outer diameter of 100.0 mm and the inner diameter of 87.0 mm is changed with respect to the wind tunnel thickness width W of 170.0 mm, and the horizontal axis is the center of the fan The vertical axis indicates the noise value in each ratio between the wind tunnel wall and the wind tunnel wall. From this graph, as in the present invention, 0.70 <a / b <0.78, 0.70 <c / d <
If it is between 0.80, it is understood that the noise value is low.

As shown in FIG. 8, the angle of a straight line e extending from the tip of the tongue 20 to the main body outlet 12 from the tip of the tongue 20 to the wind tunnel 9 from the tongue 20 to the wind tunnel outlet 14 at the beginning of winding of the wind tunnel 9 is multi-blade. For an angle f between a straight line extending from the center 22 of the fan 8 to the main body discharge port 12 and a straight line extending from the center 22 of the multi-blade fan 8 and extending to the starting point of the arc of the tongue 20,
It is desirable that the relationship be 0.30 <e / f <0.85. With this configuration, it is possible to reduce the separation of the flow downstream of the tongue portion 20 at the start of winding and the turbulent flow near the main body discharge port 12, thereby reducing the noise generated from the main body.

FIG. 9 shows a difference in performance depending on the relationship between the angle e and the angle f. Here, the wind tunnel thickness width W is 170.0 mm, the outer diameter is 100.0 mm,
The data for the multiblade fan 8 having an inner diameter of 87.0 mm is shown, in which the horizontal axis is e / f and the vertical axis is the noise value. From this graph, as in the present invention, 0.30 <e / f <0.8
If it is between 5, it is understood that the noise value is low.

In the case where a plurality of multi-blade fans 8 are installed on the same axis as in the example of the above embodiment, the flow of air between the fans may be mixed. This is a cause of noise increase. Therefore, when a plurality of multi-blade fans 8 are installed on the same axis, as shown in FIG.
And the fan width L are desirably configured to satisfy the relationship of B / L> 0.65. Thus, B / L> 0.65
, The flow of air between the fan and the fan is reduced, and noise is reduced.

FIG. 11 is a graph showing the relationship between the width B of the wind tunnel inlet and the width L of the fan. The horizontal axis represents B / L, and the vertical axis represents the noise value. B / L has an inflection point near 0.65,
If L is 0.65 or less, it can be seen that the noise value sharply increases.

When two or more multi-blade fans 8 are installed on the same axis as in the example of the above-described embodiment, at least the air-tunnel suction port 13 on the fan suction port side opposed to the multi-blade fan 8 as shown in FIG. It is desirable to dispose an air introduction member 24 having a bell mouth structure as shown in FIG. By arranging the air introduction member 24 having the bell mouth structure in this manner, the flow of air to the fan suction port becomes smooth, thereby reducing flow loss and noise.

FIG. 14 shows a comparison of the performance depending on the presence or absence of the air introduction member 24 having a bell mouth structure. Here, for a multiblade fan 8 having an outer diameter of 100.0 mm and an inner diameter of 87.0 mm, an outer diameter of 81.0 mm and an inner diameter of 77.0 mm
The data when the air introduction member 24 is installed in the wind tunnel inlet 13 and when the air introduction member 24 is not installed are shown, in which the horizontal axis represents the airflow and the vertical axis represents the noise value. From this graph, it can be seen that the installation of the air introduction member 24 having the bell mouth structure reduces the noise value by about 1 to 2 dB at the same air volume.

[0024]

As described above, according to the first aspect of the present invention, the main body case is provided with a main body suction port on one surface and a main body discharge port on the other surface, and is formed by a wall surface projecting from the inner surface of the main body case. A plurality of spiral wind tunnels, the wind tunnel has a wind tunnel suction port and a wind tunnel discharge port, and a blower for sending air has a drive motor and a wind tunnel thickness installed on the same bearing in each wind tunnel. The width W and the outer diameter D of the fan are 0.55 <D / W
A fan blade having one or more multi-blade fans in a relationship of <0.70, and a fan suction port of the multi-blade fan being close to the wind tunnel suction port, and blowing air between the wind tunnel suction port and the main body suction port. In the air purifier provided with a filter for purifying air sucked into the section, the wind tunnel thickness width W and the wind tunnel exit flow path width A are set to 0.1.
Since the shape of the wind tunnel is formed so as to satisfy the relationship of 5 <A / W <0.27, the flow of the air flowing out of the main body discharge port becomes linear, and the main body generated by winding the tongue at the beginning of the wind tunnel winding is formed. The turbulence near the discharge port can be reduced, and the noise value generated from the air purifier can be reduced.

[0025] The invention of claim 2 of the present invention is based on claim 1
In addition to the effects described above, the center of the multi-blade fan installed in the wind tunnel is 0.70 <a on the side a where the distance between the multi-blade fan and the wall surface of the wind tunnel is small and the side b where the width is large. / B <0.
78, and the multi-blade fan 8
0.70 <for the narrow side c and the wide side d where the distance between the
Since the arrangement is such that c / d <0.80, the air discharged from the multi-blade fan is smoothly discharged from the main body discharge port without circulating again from the tongue portion of the wind tunnel into the wind tunnel. In this case, the loss and the noise can be reduced.

The invention of claim 3 of the present invention is directed to claim 1
In addition to the effects described above, the angle e of the wall extending from the tongue to the wind tunnel outlet at the beginning of the wind tunnel and the straight line e extending vertically from the tip of the tongue to the wind tunnel outlet at the beginning of the wind tunnel is defined by The angle f between the straight line extending perpendicularly to the outlet direction and the straight line starting from the center of the multi-blade fan and extending to the arc starting point of the tongue is set so as to have a relationship of 0.30 <e / f <0.85. With this configuration, it is possible to reduce the separation of the flow downstream from the tongue at the beginning of the winding and the turbulence near the discharge port of the main body, thereby reducing the noise generated from the main body.

The invention of claim 4 of the present invention provides the method of claim 1
In addition to the effects described above, when two or more multi-blade fans are installed on the same axis, the width B between the wind tunnel suction ports on the side of the opposed fan suction port and the fan width L of the multi-blade fan are reduced. B / L
Since it is configured so as to satisfy the relationship of> 0.65, the mixed flow of air between the multi-blade fans is reduced, and the noise is reduced.

Further, the invention of claim 5 of the present invention is directed to claim 1
In addition to the effects described above, when two or more multi-blade fans are installed on the same axis, an air introduction member having a bell mouth structure is arranged at least in the wind tunnel suction port on the side of the opposed fan suction port. Therefore, the flow of air to the fan suction port of the multi-blade fan becomes smooth, thereby reducing loss and noise.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an example of an embodiment of an air purifier of the present invention.

FIG. 2 is an explanatory diagram of a state where two multi-blade fans are mounted on the same axis.

FIG. 3 is a cross-sectional view illustrating an air flow of the air purifier of the above.

FIG. 4 is a cross-sectional view illustrating a wind tunnel section of the above.

FIG. 5 is a graph showing the relationship between the A / W ratio and noise in the above.

FIG. 6 is a cross-sectional view illustrating a wind tunnel section of the above.

FIG. 7 is a graph showing a relationship between the ratio of a / b and c / d and noise.

FIG. 8 is a cross-sectional view illustrating a wind tunnel section of the above.

FIG. 9 is a graph showing the relationship between the e / f ratio and noise in the above.

FIG. 10 is an explanatory diagram showing a relationship between a fan width and a suction width according to the first embodiment.

FIG. 11 is a graph showing a relationship between a B / L ratio and noise in the above.

FIGS. 12 (a) and (b) are a front view and a side view of the air introduction member.

FIG. 13 is a cross-sectional view illustrating an attached state of the air introduction member.

FIG. 14 is a graph showing the relationship between air flow and noise when the air introduction member is attached and not attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air purifier 2 Main body case 8 Multi-blade fan 9 Wind tunnel 10 Main body suction port 12 Main body discharge port 13 Wind tunnel suction port 14 Wind tunnel discharge port 15 Driving motor 20 Winding start tongue 24 Air introduction member

Claims (5)

[Claims] 1. A main body case having a main body suction port on one side and a main body discharge port on the other side, and one or more spiral wind tunnels formed by walls protruding from the inner face of the main body case. A blower for sending air, a drive motor, a wind tunnel thickness width W installed on the same bearing in each wind tunnel, and a fan outer diameter D of 0.5.
5 <D / W <0.70, one or a plurality of multi-blade fans, and the fan suction port of the multi-blade fan is close to the wind tunnel suction port, and the wind tunnel suction port and the main body suction port are provided. In the air purifier provided with a filter for purifying the air sucked into the blower between the air channel and the air channel, the width W of the wind tunnel and the width A of the flow path at the exit of the wind tunnel have a relationship of 0.15 <A / W <0.27. An air purifier characterized by having a wind tunnel shape. 2. The center of the multi-blade fan installed in the wind tunnel is 0.70 <a / b <on the side a and the wide side b where the distance between the multi-blade fan and the wall of the wind tunnel is small in the width W of the wind tunnel. 0.7
In the vertical width V of the wind tunnel, the distance between the multi-blade fan and the wind tunnel wall is 0.70 <c / on the narrow side c and the wide side d.
The air purifier according to claim 1, wherein the air purifier is arranged so that d <0.80. 3. The angle e between a wall extending from the tongue to the wind tunnel outlet at the beginning of the wind tunnel and the straight line extending vertically from the tip of the tongue to the wind tunnel outlet at the wind tunnel from the center of the multi-blade fan to the wind tunnel outlet. The angle f between the straight line extending perpendicularly to the straight line and the straight line extending from the center of the multi-blade fan to the starting point of the arc of the tongue is 0.30 <e / f <0.85. The air purifier according to claim 1, wherein: 4. When two or more multi-blade fans are installed on the same axis, the width B between the wind tunnel suction ports on the side of the opposed fan suction port and the fan width L of the multi-blade fan are B / L> 0.
The air purifier according to claim 1, wherein the air purifier has a relationship of 65. 5. An air introduction member having a bell mouth structure is disposed at least in the wind tunnel suction port on the side of the opposed fan suction port when two or more multi-blade fans are installed on the same axis. The air purifier according to claim 1, wherein: