JP3975636B2 - air purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air purifier that collects dust, odor, and the like contained in the air and purifies the air.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, air purifiers that collect dust, odors, and the like contained in the air and purify the air are known. This type of air cleaner is configured, for example, as shown in FIG. That is, a wind tunnel portion 4 is formed in the vicinity of the discharge port 3 formed in the main body case 1, and a sirocco fan 5 is provided in the wind tunnel portion 4. The sirocco fan 5 is provided on a shaft 8 rotatably supported by a bearing 21, and rotates when the shaft 8 is driven and rotated by a motor (not shown). In this case, a filter (not shown) that collects dust, odors, and the like is provided in the middle of the air path leading to the wind tunnel portion 4 in the main body case 1.
[0003]
Therefore, in this case, when the sirocco fan 5 is rotated, external air is sucked into the main body case 1, and the sucked air is discharged from the discharge port 3 through the air passage and the wind tunnel portion 4. At that time, dust, odor, etc. are collected from the air flowing in the middle of the air passage by the filter, the air is cleaned, and the cleaned air is discharged from the discharge port 3. Therefore, by installing and operating this air purifier in the room, it is possible to purify while circulating the air in the room.
[0004]
[Problems to be solved by the invention]
However, in the above prior art, when the pressure loss of the filter is large, the amount of air supplied to the sirocco fan 5 in the wind tunnel portion 4 is insufficient, and the sirocco fan 5 is designed to compensate for the shortage. Near the end, air is sucked from the side end of the discharge port 3, and a backflow b along the side wall is generated in the discharge port 3. For this reason, there has been a problem that noise increases due to contact between the main flow a discharged from the discharge port 3 by the sirocco fan 5 and the reverse flow b. Moreover, when the back flow b comes into contact with the main flow a, the main flow a is disturbed and the flow becomes unsmooth, and the amount of air that is cleaned through the filter and becomes the main flow a decreases. There was a problem that the collection efficiency was lowered.
[0005]
The present invention was invented in order to solve the above-described problems in the prior art, and its object is to provide an air purifier in which noise is reduced and the collection efficiency by a filter is improved.
[0006]
[Means for Solving the Problems]
The air purifier according to claim 1 of the present invention has a suction port and a discharge port formed in the main body case, and an air passage extending from the suction port to the discharge port is provided in the main body case. An air cleaner in which a substantially spiral-shaped wind tunnel is formed in the vicinity of a discharge port, a sirocco fan is provided in the wind tunnel, and a filter is provided in the middle of the same wind path leading to the sirocco fan, A partition wall that separates the main flow from the sirocco fan flowing out from the sirocco fan and the backflow flowing from the discharge port near the end of the sirocco fan is provided in the discharge port.
[0007]
Therefore, in this case, the partition wall provided in the discharge port separates the main flow from the sirocco fan that flows out from the middle of the discharge port and the reverse flow that flows from the discharge port near the end of the sirocco fan. Therefore, the main flow and the reverse flow flow without contacting each other, and noise is reduced. In addition, the main flow and the reverse flow flow away from each other without contacting each other on both sides of the partition wall, so that the air flow is smooth and the amount of air that is cleaned through the filter and becomes the main flow is maintained. The collection efficiency by the filter is improved.
[0008]
The air cleaner according to claim 2 of the present invention is characterized in that, in the air cleaner according to claim 1, the partition wall is formed in a direction orthogonal to an axis serving as a rotation center of the sirocco fan.
[0009]
Therefore, in this case, in particular, since the partition wall is formed in a direction perpendicular to the axis serving as the rotation center of the sirocco fan, the partition wall is parallel to the mainstream direction from the sirocco fan, On both sides of the wall, the main flow and the reverse flow are in opposite directions and flow in a straight line with little resistance, and the separation effect between the two becomes high, and the air flow becomes smoother. Therefore, the amount of air that has been cleaned through the filter and becomes the mainstream is secured, and the collection efficiency by the filter is further improved.
[0010]
The air cleaner according to claim 3 of the present invention is characterized in that, in the air cleaner according to claim 1, the partition wall is formed in a direction inclined outward toward the sirocco fan.
[0011]
Therefore, in this case, in particular, since the partition wall is formed in a direction inclined outward toward the sirocco fan, the area of the main flow path increases as it approaches the sirocco fan, and the main flow path is cleaned with a filter. A large amount of air is exhaled, and conversely, the closer to the sirocco fan, the smaller the reverse flow path area, and the smaller the amount of inflow from the reverse flow path. Therefore, the amount of the air that flows out from the discharge port as it is without flowing through the filter is reduced, and the collection efficiency by the filter is further improved.
[0012]
The air cleaner according to claim 4 of the present invention is characterized in that, in the air cleaner according to claim 1, the partition wall is extended to the outside of the discharge port to form a protruding partition piece.
[0013]
Therefore, in this case, in particular, since the partition wall is extended to the outside of the discharge port and the protruding partition piece is formed, the protrusion partition piece prevents contact between the main flow and the reverse flow outside the discharge port, The interference between the two is reduced and the noise is further reduced.
[0014]
The air cleaner according to claim 5 of the present invention is characterized in that, in the air cleaner according to claim 4, an extended piece portion bent outward is formed at the protruding leading edge of the protruding partition piece.
[0015]
Therefore, in this case, in particular, since the extended piece portion bent outward is formed at the protruding leading edge of the protruding partition piece, it is guided by the protruding partition piece having the extended piece portion and flows from the discharge port. The backflow to be performed becomes a flow from the outside away from the main flow, interference between the main flow and the back flow is further reduced, and noise is more reliably reduced.
[0016]
The air purifier according to claim 6 of the present invention is the air purifier according to claim 1, wherein an auxiliary filter is provided in the middle of the reverse flow path formed between the outer wall of the partition wall and the inner wall of the discharge port. It is characterized by that.
[0017]
Therefore, in this case, in particular, an auxiliary filter is provided in the middle of the reverse flow path formed between the partition wall and the inner wall of the discharge port, so that the auxiliary filter flows in through the reverse flow path. Air is also cleaned, and air containing dust and odor that has not been cleaned is hardly discharged from the outlet, and the collection efficiency by the filter is further improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 5 show an embodiment corresponding to claims 1 and 2 of the present invention. An air cleaner according to the embodiment forms a suction port 2 and a discharge port 3 in a main body case 1, and An air passage extending from the mouth 2 to the discharge port 3 is provided in the main body case 1, a substantially spiral air tunnel portion 4 is formed in the vicinity of the air discharge port 3 of the air passage, and a sirocco fan 5 is provided in the air tunnel portion 4. , And a filter 6 (pre-filter 6a and main filter 6b) is provided in the middle of the same air path leading to the sirocco fan 5, in which the mainstream from the sirocco fan 5 flowing out from the middle of the discharge port 3 A partition wall 7 is provided in the discharge port 3 for separating a and the reverse flow b flowing in from the discharge port 3 near the end of the sirocco fan 5. In this case, the partition wall 7 is formed in a direction orthogonal to the axis 8 that is the center of rotation of the sirocco fan 5.
[0019]
As shown in FIGS. 2 to 4, the main body case 1 has a box shape and is formed by coupling and integrating a front case 14 and a back case 15. The main body case 1 is opened at the lower part of the front surface of the front case 14. The opening serves as the suction port 2, and the suction port 2 is also provided at the bottom portion of the back case 15. Inside the main body case 1, a prefilter 6a, a discharge electrode block 16, and a main filter 6b for mechanically collecting dust are accommodated and installed in this order from the bottom.
[0020]
In this case, the prefilter 6a, the discharge electrode block 16, and the main filter 6b can be taken in and out from the opening serving as the suction port 2, and the front lid cover 17 that closes the opening covers the front surface of the front case 14 of the main body case 1. It is attached as follows. Here, a ventilation louver portion 18 communicating with the opening serving as the suction port 2 is formed in the lower portion of the front lid cover 17. Similarly, the suction port 2 provided in the bottom portion of the back case 15 has a ventilation louver shape.
[0021]
As shown in FIG. 5, a wind tunnel portion 4 is disposed on both sides in the main body case 1, and a sirocco fan 5 is disposed in each of the wind tunnel portions 4. In this case, a drive motor 19 and a shaft 8 coupled and fixed to the rotating shaft of the drive motor 19 by a coupling 20 are provided as a blowing unit for sending room air to the front case 14. An end portion of the 8 opposite to the coupling 20 is rotatably supported and fixed by a bearing 21.
[0022]
Two sirocco fans 5 are disposed on the shaft 8, and a wind tunnel portion 4 is formed so as to surround each of the sirocco fans 5. Here, the wind tunnel portion 4 has a substantially spiral shape, and a shape obtained by dividing the substantially spiral shape in the front and rear directions is formed in the front case 14 and the back case 15, and the same is obtained by combining the front case 14 and the back case 15. The wind tunnel portion 4 is formed. In addition, as shown in FIGS. 1 to 3, a discharge port 3 is formed on the upper surface of the back case 15 at a position parallel to the shaft 8. In this case, the discharge port 3 corresponds to each of the two sirocco fans 5. Are arranged.
[0023]
Further, both the discharge ports 3 are formed in a ventilation louver shape, and as shown in FIG. 1, partition walls 7 are disposed on both sides of each discharge port 3. The partition wall 7 has a thin plate shape and is parallel to the inner wall 11 of the discharge port 3, and a reverse flow path 12 through which a reverse flow b flows is formed outside the partition wall 7. The partition wall 7 is formed integrally with the back case 15 in which the discharge port 3 is formed, and is positioned so as to correspond to both end portions of the both sirocco fans 5. In addition, as shown in FIG. 2, a part of the protruding end edge of the partition wall 7 is formed in a substantially arc shape along the outer periphery of the end of the sirocco fan 5 and is close to the outer periphery of the end.
[0024]
As shown in FIG. 3, the air flow in the air cleaner of this embodiment is such that the external air flowing in from the suction port 2 passes through the pre-filter 6a, the discharge electrode block 16, and the main filter 6b, Then, it is deodorized and passes through the wind tunnel portion 4 in which the sirocco fan 5 serving as the air blowing portion is accommodated, and flows out from the discharge port 3. At that time, as shown in FIG. 1, the flow of air flowing out from the discharge port 3 becomes the main flow a, and the reverse flow b flows into the reverse flow path 12 on both sides of the main flow a.
[0025]
Therefore, by installing and operating the air purifier of this embodiment in a room, it is possible to purify while circulating the air in the room. In this case, if the trapping capacity of the filter 6 (prefilter 6a and main filter 6b) is increased, the pressure loss of the filter 6 inevitably increases. In such a case, the amount of air supplied to the sirocco fan 5 Even if there is a shortage, the shortage is compensated by the backflow b flowing from the discharge port 3 in the vicinity of both ends of the sirocco fan 5, and the air cleaner of the embodiment is operated without any trouble.
[0026]
In this case, as shown in FIG. 1, the partition wall 7 provided in the discharge port 3 causes the main flow a from the sirocco fan 5 to flow out from the middle of the discharge port 3 and both ends of the sirocco fan 5. Since the reverse flow b flowing from both sides of the discharge port 3 is separated in the vicinity of the portion, the main flow a and the reverse flow b flow without contacting each other, and noise is reduced. Moreover, since the main flow a and the back flow b flow away from each other without contacting each other on both sides of the partition wall 7, the air flow is smooth, and the amount of air that is cleaned through the filter 6 to become the main flow a is also Thus, the collection efficiency by the filter 6 is improved.
[0027]
Further, since the partition wall 7 is formed in a direction orthogonal to the axis 8 that is the rotation center of the sirocco fan 5, the partition wall 7 is parallel to the direction of the main flow a from the sirocco fan 5, On the both sides of the partition wall 7, the main flow a and the reverse flow b are in opposite directions and flow linearly with little resistance, and the separation effect between the two becomes high, and the air flow becomes smoother. Therefore, the amount of air that is cleaned through the filter 6 and becomes the mainstream a is also secured, and the collection efficiency by the filter 6 is further improved.
[0028]
FIG. 6 shows another embodiment corresponding to claims 1 and 3 of the present invention. In the air cleaner of the embodiment, the partition wall 7 is formed in a direction inclined outward toward the sirocco fan 5. Yes. In this case, the width dimension of the reverse flow path 12 formed between the inner wall 11 of the discharge port 3 and the partition wall 7 is such that the flow path at the front end edge of the partition wall 7 near the end of the sirocco fan 5. The width dimension β becomes narrower than the flow path width dimension α at the discharge port 3, and most of the air blown from the sirocco fan 5 becomes a main flow a without being wasted and is discharged from the discharge port 3.
[0029]
Therefore, in the air cleaner of this embodiment, since the partition wall 7 is formed in a direction inclined outward toward the sirocco fan 5, the main flow passage area increases as it approaches the sirocco fan 5, and the mainstream A large amount of air purified by the filter 6 is discharged from the road, and conversely, the area near the sirocco fan 5 decreases as the area of the reverse flow path 12 decreases and the amount of inflow from the reverse flow path 12 decreases. Therefore, the amount of the air that flows from the discharge port 3 without flowing through the filter 6 as it flows out from the discharge port 3 is reduced, and the collection efficiency by the filter 6 is further improved. In addition, it is comprised similarly to embodiment shown to the said FIGS. 1-5, and the effect other than that based on Claim 2 is show | played similarly to the said embodiment.
[0030]
FIG. 7 shows still another embodiment corresponding to the first, second, and fourth aspects of the present invention. In the air purifier of the embodiment, the partition wall 7 is extended to the outside of the discharge port 3 to project the partition. A piece 9 is formed. In this case, together with the partition walls 7 disposed on both sides of the discharge port 3, the protruding partition pieces 9 are also disposed on both sides of the discharge port 3.
[0031]
Therefore, in the air purifier of this embodiment, the partition wall 7 is extended to the outside of the discharge port 3 so that the protruding partition piece 9 is formed. Contact between the main flow a and the back flow b is prevented, interference between the two is reduced, and noise is further reduced. In addition, it is comprised similarly to embodiment shown to the said FIGS. 1-5 except that, and there exists an effect similar to the said embodiment.
[0032]
FIG. 8 shows still another embodiment corresponding to the first, second, fourth, and fifth aspects of the present invention. In the air cleaner according to this embodiment, the protruding tip edges of both protruding partition pieces 9 in the above embodiment are shown. In addition, the extended piece 10 bent outward is formed.
[0033]
Therefore, in the air cleaner of this embodiment, since the extended piece 10 bent outward is formed at the protruding leading edge of the protruding partition piece 9, the protruding partition piece having the extended piece 10 is formed. 9, the back flow b flowing from the discharge port 3 flows from the outside away from the main flow a, and the interference between the main flow a and the back flow b is further reduced, and the noise is more reliably reduced. Is done. Other than that, the configuration is the same as that of the embodiment shown in FIG. 7, and the same operational effects as in the above-described embodiment are achieved.
[0034]
FIG. 9 shows still another embodiment corresponding to claims 1, 2, and 6 of the present invention. In the air purifier of the embodiment, the space between the inner wall 11 of the discharge port 3 and the outside of the partition wall 7 is shown. An auxiliary filter 13 is provided in the middle of the reverse flow path 12 formed by In this case, the auxiliary filter 13 has a low pressure loss, and is made of, for example, a nonwoven fabric or sponge, and is accommodated and installed at the lip portion of the discharge port 3 in the reverse flow path 12.
[0035]
Therefore, in the air cleaner of this embodiment, since the auxiliary filter 13 is provided in the middle of the reverse flow path 12 formed between the inner wall 11 of the discharge port 3 outside the partition wall 7, The air flowing in through the reverse flow path 12 is also cleaned by the filter 13, and air containing dust and odor that has not been cleaned is hardly discharged from the discharge port 3, and the filter including the auxiliary filter 13 The collection efficiency by 6 is further improved. In addition, it is comprised similarly to embodiment shown to the said FIGS. 1-5 except that, and there exists an effect similar to the said embodiment.
[0036]
【The invention's effect】
As described above, in the air purifier according to claim 1 of the present invention, the partition wall prevents contact between the main flow and the reverse flow, noise is reduced, and air flows smoothly and cleans through the filter. The amount of air to be kept is also maintained, and the collection efficiency by the filter is improved.
[0037]
In the air cleaner according to claim 2 of the present invention, in particular, the main flow and the reverse flow flow linearly on both sides of the partition wall with little resistance, and the separation effect between the two increases, so that the air flow is more It becomes smooth and the collection efficiency by the filter is further improved.
[0038]
Further, in the air purifier according to claim 3 of the present invention, in particular, the closer to the sirocco fan, the smaller the reverse flow path area is, and the inflow amount from the reverse flow path is reduced. The amount of the air that flows out from the discharge port as it is is reduced, and the collection efficiency by the filter is further improved.
[0039]
Further, in the air purifier according to claim 4 of the present invention, the contact between the main flow and the reverse flow is prevented even outside the discharge port, particularly by the protruding partition piece in which the partition wall is extended to the outside of the discharge port. Thus, the interference between the two is reduced, and the noise is further reduced.
[0040]
Further, in the air cleaner according to claim 5 of the present invention, the back flow flowing in from the discharge port is guided from the outer side away from the main flow, particularly guided by the protruding partition piece having the extending piece portion bent outward. Thus, the interference between the main flow and the reverse flow is further reduced, and the noise is more reliably reduced.
[0041]
Further, in the air purifier according to claim 6 of the present invention, in particular, the air flowing in through the reverse flow path is also cleaned by the auxiliary filter, and the uncleaned air is hardly discharged from the discharge port. The collection efficiency by the filter is further improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a main part of an air cleaner according to an embodiment of the present invention.
FIG. 2 is a schematic longitudinal sectional view in a different direction showing the main part of the air cleaner.
FIG. 3 is a longitudinal sectional view showing the entire air cleaner.
FIG. 4 is an exploded perspective view showing the entire air purifier.
FIG. 5 is a cross-sectional view showing the entire air cleaner.
FIG. 6 is a longitudinal sectional view showing a main part of an air cleaner according to another embodiment.
FIG. 7 is a longitudinal sectional view showing a main part of an air cleaner according to still another embodiment.
FIG. 8 is a longitudinal sectional view showing a main part of an air cleaner according to still another embodiment.
FIG. 9 is a longitudinal sectional view showing a main part of an air cleaner according to still another embodiment.
FIG. 10 is a longitudinal sectional view showing a main part of a conventional air cleaner.
[Explanation of symbols]
1 Body Case 2 Suction Port 3 Discharge Port 4 Wind Tunnel 5 Sirocco Fan 6 Filter
6a Pre-filter
6b This filter 7 Partition wall 8 Shaft 9 Protruding partition piece
10 Extension piece
11 Inner wall
12 Reverse flow path
13 Auxiliary filter

Claims (6)

In addition to forming a suction port and a discharge port in the main body case, an air passage extending from the suction port to the discharge port is provided in the main body case, and a substantially spiral wind tunnel portion is formed near the discharge port of the air passage. An air cleaner in which a sirocco fan is provided in the wind tunnel and a filter is provided in the middle of the air path leading to the sirocco fan, the mainstream from the sirocco fan flowing out from the middle of the discharge port, and the sirocco An air purifier in which a partition wall for separating a reverse flow flowing in from the outlet near the end of the fan is provided in the outlet. 2. The air cleaner according to claim 1, wherein the partition wall is formed in a direction orthogonal to an axis serving as a rotation center of the sirocco fan. 2. The air purifier according to claim 1, wherein the partition wall is formed in a direction inclined outward toward the sirocco fan. The air cleaner according to claim 1, wherein the partition wall is extended to the outside of the discharge port to form a protruding partition piece. 5. The air cleaner according to claim 4, wherein an extended piece portion bent outward is formed at a protruding tip edge of the protruding partition piece. The air cleaner according to claim 1, wherein an auxiliary filter is provided in the middle of a reverse flow path formed between the outer wall of the discharge port and the inner wall of the discharge port.

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