JP4096486B2 - 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 20 rotatably supported by a bearing 21, and the shaft 20 is rotated by being 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, the external air sucked as the backflow b is not cleaned by the filter, but is directly discharged from the discharge port 3 by the sirocco fan 5, which causes a problem that the collection efficiency by the filter is 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. A substantially spiral-shaped wind tunnel is formed in the vicinity of the discharge port, a sirocco fan is provided in the wind tunnel, and a filter is provided in the middle of the same air path leading to the sirocco fan. A reverse flow is formed between the convex step and the outer periphery of the end of the sirocco fan so that the air from the sirocco fan is rewound outward to generate a reverse flow between the convex step and the outer periphery of the sirocco fan. A space is provided.
[0007]
Therefore, in this case, the backflow space between the convex step formed on the inner side of the side wall edge of the discharge port and the outer periphery of the end of the sirocco fan generates a backflow by rewinding the air from the sirocco fan to the outside. Therefore, reverse inflow of external air is prevented by the convex stepped portion. That is, if the filter's collection capacity is increased, the pressure loss of the filter will inevitably increase. In such a case, even if the amount of air supplied to the sirocco fan is insufficient, the shortage is caused by the backflow. Since it is compensated for, reverse inflow of external air is prevented.
[0008]
Further, since the backflow is generated by the air blown back from the sirocco fan, the main flow discharged from the discharge port by the sirocco fan and the backflow are hardly in contact with each other, and noise is generated. Is reduced. In addition, the backflow is generated inside, and the air that is backflow is already cleaned by the filter, and the air that has not been cleaned is hardly discharged from the discharge port. The collection efficiency is improved. In addition, here, the reverse flow of external air is prevented, so that the air flow is large and smooth, and dust, odors, and the like contained in the air are effectively collected by the filter.
[0009]
The air cleaner according to claim 2 of the present invention is characterized in that, in the air cleaner according to claim 1, a partition piece for partitioning a backflow space is provided at the inner end of the convex step portion.
[0010]
Therefore, in this case, in particular, the backflow space is defined by the partition piece protruding from the inner end of the convex step portion, and therefore, the backflow space is affected by the main flow discharged from the discharge port by the sirocco fan. Therefore, the backflow is surely generated, and the backflow is easily circulated to the sirocco fan, the air flow becomes smoother, and the collection efficiency by the filter is further improved. In addition, since the main flow and the back flow are partitioned by the partition pieces, contact between the two is reliably prevented, and noise is further reduced.
[0011]
The air purifier according to claim 3 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 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 air path leading to the sirocco fan. A plate-like convex step portion that protrudes inwardly toward the inner side is formed, and an outer space of the convex step portion is opened outside the discharge port so that air is exhausted from the opening. It is characterized in that a backflow space is formed between the exhaust flow and the side wall of the discharge port.
[0012]
Therefore, in this case, in particular, a plate-like convex step portion that protrudes inward from the discharge port toward the sirocco fan is formed, and the outer space of the convex step portion is opened to the outside of the discharge port. Therefore, the air purified from the opening is blown and exhausted as a main stream. Therefore, the flow of air becomes larger and the collection efficiency by the filter is further improved. In addition, a backflow space is formed between the blowout exhaust flow that becomes the mainstream and the side wall of the discharge port, so that a backflow is generated in the backflow space while being suppressed by the mainstream. Thus, reverse inflow is reliably prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment corresponding to claim 1 of the present invention. An air purifier according to the embodiment forms a suction port 2 and a discharge port 3 in a main body case 1 and the suction port. 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 this case, the reverse inflow from the outside is blocked inside the side wall edge of the discharge port 3. A backflow space 8 is formed between the convex step 7 and the outer periphery of the end of the sirocco fan 5 to rewind the air from the sirocco fan 5 and generate a backflow b inside. Provided.
[0014]
As shown in FIGS. 2 and 3, the main body case 1 has a box shape and is formed by coupling and integrating a front case 13 and a back case 14. The main body case 1 is opened at the front lower portion of the front case 13, and the opening serves as the suction port 2, and the suction port 2 is also disposed at the bottom portion of the back case 14. Inside the main body case 1, a prefilter 6a, a discharge electrode block 15, and a main filter 6b for mechanically collecting dust are accommodated and installed in this order from the bottom.
[0015]
In this case, the prefilter 6a, the discharge electrode block 15, 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 16 that closes the opening covers the front surface of the front case 13 of the main body case 1. It is attached as follows. Here, a ventilation louver portion 17 communicating with the opening serving as the suction port 2 is formed in the lower portion of the front lid cover 16. Similarly, the suction port 2 provided in the bottom portion of the back case 14 has a ventilation louver shape.
[0016]
As shown in FIG. 4, 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 18 and a shaft 20 that is coupled and fixed to the rotating shaft of the drive motor 18 by a coupling 19 are provided as a blowing unit for sending indoor air to the front case 13. An end of 20 opposite to the coupling 19 is rotatably supported and fixed by a bearing 21.
[0017]
Two sirocco fans 5 are disposed on the shaft 20, 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 into the front and rear sides is formed in the front case 13 and the back case 14, and the same is obtained by combining the front case 13 and the back case 14. The wind tunnel portion 4 is formed. 1 and 2, a discharge port 3 is formed at a position parallel to the shaft 20, as shown in FIGS. 1 and 2. In this case, the discharge port 3 corresponds to each of the two sirocco fans 5. Are arranged.
[0018]
Further, both the discharge ports 3 are formed in the shape of a ventilation louver, and as shown in FIG. 1, convex step portions 7 are arranged and formed on both sides along the inner sides of both side walls of each discharge port 3. ing. The convex step portion 7 has a substantially rectangular cross section, is integrally formed with the back case 14 in which the discharge port 3 is formed, and is positioned so as to correspond to both ends of the both sirocco fans 5. Further, the lower surface of the convex portion 7 is substantially parallel to the shaft 20 and is sufficient to circulate the air blown from the sirocco fan 5 outwardly between the lower surface and the outer periphery of the end of the sirocco fan 5. A backflow space 8 having a large interval is provided.
[0019]
As shown in FIG. 2, the air flow in the air purifier of the embodiment is such that the external air flowing in from the suction port 2 passes through the pre-filter 6a, the discharge electrode block 15, 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 back flow b is generated in the back flow space 8 on both sides of the main flow a.
[0020]
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, as shown in FIG. 1, the air blown from the sirocco fan 5 is directed outwardly between the convex step 7 formed on the inner side of the side wall edge of the discharge port 3 and the outer periphery of both ends of the sirocco fan 5. Since the backflow space 8 which is wound back and generates the backflow b inside is provided, the backflow of external air is reliably prevented by the two convex step portions 7. That is, if the trapping capacity of the filter 6 (the pre-filter 6a and the 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 increases. Even if it is insufficient, the shortage is compensated by the backflow b, so that backflow of external air is prevented.
[0021]
Further, since the reverse flow b is generated by the air blown from the sirocco fan 5 being wound back outward, both the main flow a discharged from the discharge port 3 by the sirocco fan 5 and the reverse flow b are There will be little contact with each other, thus reducing noise. The back flow b is generated inside the main body case 1, and the air that forms the back flow b has already been cleaned by the filter 6, and has not been cleaned from the discharge port 3. Air containing odor is hardly exhaled, and the collection efficiency by the filter 6 is improved. In addition, since the reverse flow of external air is prevented here, the air flow is large and smooth, and the filter 6 effectively collects and removes dust, odors, etc. contained in the air. Is done.
[0022]
FIG. 5 shows another embodiment corresponding to claims 1 and 2 of the present invention. In the air purifier of the embodiment, a partition piece that partitions and forms a backflow space 8 at the inner end of the convex step portion 7. 9 is projected. In this case, the partition piece 9 is disposed on the convex step portions 7 on both sides, and extends in a thin plate shape from the inner end edges along the inner end edges of the both convex step portions 7. Further, the protruding end edge of the partition piece 9 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.
[0023]
Therefore, in the air cleaner of the embodiment, the backflow space 8 is defined by the partition piece 9 protruding from the inner end of the convex step portion 7, so that the sirocco fan 5 is used in the backflow space 8. The back flow b is reliably generated without being affected by the main flow a discharged from the discharge port 3. Therefore, the back flow b is easily circulated to the sirocco fan 5, the air flow becomes smoother, and the collection efficiency by the filter 6 is further improved. In addition, since the main flow a and the back flow b are partitioned by the partition piece 9, contact between the two is reliably prevented, and noise is further reduced. In addition, it is comprised similarly to embodiment shown to the said FIGS. 1-4, and there exists an effect similar to the said said embodiment except it.
[0024]
FIG. 6 shows still another embodiment corresponding to claim 3 of the present invention, and in the air purifier of the embodiment, a plate piece that inclines inwardly toward the sirocco fan 5 from the discharge port 3. Jo of forming a convex stepped portion 7, the outer space 10 of the convex stepped portion 7 is opened to the outside of the discharge port 3 without as blown discharged from the opening 11, on the outside of the air blowing exhaust stream 12 A backflow space 8 is formed between the discharge port 3 and the side wall. In this case, the thin plate-shaped and inclined convex step portions 7 are disposed on both sides of the discharge port 3, and the protruding side end edges of the two convex step portions 7 are 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. Therefore, the air blown from the vicinity of the end of the sirocco fan 5 is forcibly discharged as a part of the main flow a from the openings 11 at both ends of the discharge port 3, and the reverse inflow of external air from the discharge port 3 is performed. Is reliably prevented.
[0025]
Therefore, in the air purifier of this embodiment, the convex step portion 7 is formed in the shape of a plate projecting inwardly from the discharge port 3 toward the sirocco fan 5, and the outer space 10 of the convex step portion 7 is Since the air is opened outside the discharge port 3, the air purified from the opening 11 is blown and exhausted as a part of the main flow a. Therefore, the air flow becomes larger and the collection efficiency by the filter 6 is further improved. Moreover, since the backflow space 8 is formed between the side wall of the discharge port 3 outside the blown exhaust flow 12 that is a part of the mainstream a, the backflow space 8 is reliably suppressed by the mainstream a. Thus, the reverse flow b is generated, thereby preventing the backflow of external air reliably. In addition, it is comprised similarly to embodiment shown to the said FIGS. 1-4, and there exists an effect similar to the said said embodiment except it.
[0026]
【The invention's effect】
As described above, in the air purifier according to claim 1 of the present invention, the backflow of the external air is prevented by the convex step portion, and the backflow that is wound back outward and the main flow that is discharged from the discharge port by the sirocco fan Almost no contact, noise is reduced, and the air generated in the counterflow is already cleaned by the filter, and the air that has not been cleaned is almost never discharged from the discharge port. The collection efficiency is improved.
[0027]
In the air cleaner according to claim 2 of the present invention, in particular, in the backflow space defined by the partition pieces, the backflow is surely generated without being affected by the main flow discharged from the discharge port by the sirocco fan. As a result, the air flow becomes smoother, the collection efficiency by the filter is further improved, and the contact between the main flow and the reverse flow is reliably prevented, and noise is further reduced.
[0028]
In the air cleaner according to claim 3 of the present invention, in particular, the air that is guided by the inclined plate-like convex step portion and purified from the outer space is blown and exhausted as a mainstream, The flow becomes larger and the collection efficiency by the filter is further improved. Moreover, in the backflow space, a backflow is generated while being suppressed by the main flow, and the backflow of external air is reliably prevented.
[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 longitudinal sectional view in a different direction showing the entire air purifier.
FIG. 3 is an exploded perspective view showing the entire air cleaner.
FIG. 4 is a cross-sectional view showing the entirety of the air cleaner.
FIG. 5 is a longitudinal sectional view showing a main part of an air cleaner according to another embodiment.
FIG. 6 is a longitudinal sectional view showing a main part of an air cleaner according to still another embodiment.
FIG. 7 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 Main filter 7 Convex step 8 Backflow space 9 Partition piece
10 Outer space
11 opening
12 Blower exhaust flow

Claims (3)

 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 purifier having a sirocco fan in the wind tunnel and a filter provided in the middle of the same air passage leading to the sirocco fan, and a convex step for blocking reverse inflow from the outside on the side wall edge of the discharge port An air purifier in which a backflow space is formed between the convex stepped portion and the outer periphery of the end portion of the sirocco fan so that the air from the sirocco fan is rewound outward to generate a backflow.  The air purifier according to claim 1, wherein a partition piece for partitioning and forming a backflow space is provided at the inner end of the convex step portion. 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. Te sirocco fan provided within該風Hora unit, an air cleaner formed by providing a filter in the middle Dokazero leading to the sirocco fan, protruding inclined inwardly toward the sirocco fan from a discharge port plate piece-like A convex step is formed, the outer space of the convex step is opened to the outside of the discharge port so that air is exhausted from the opening, and between the side wall of the discharge port outside the air flow The air purifier is characterized in that a backflow space is formed in the air cleaner.

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