JPH09849A - Air cleaner - Google Patents

Abstract

PURPOSE: To reduce the water supply volume, improve the oil collecting efficiency while reducing the power consumption and prevent the inside of a tank and a water drainage pipe from being soiled. CONSTITUTION: A plurality of vent holes 7 are formed on one side of a water retention plate 8, and a remaining section of the water retention plate 8 is used as a non-air vent section 9 without vent holes 7. The water supply volume from a water supply opening 12 to the water retention plate 8 is increased only at the time of start, and a water volume changeover means for changing over the water volume so as to reduce the water supply volume during the operation is disposed. The vent hole 7 are formed into an ellipse hole shape with round corners and disposed in an array in the zigzag shape on the water retention plate 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying device,
Specifically, for example, it relates to an air purifying device that is attached to a range hood of a kitchen and purifies contaminated air containing oil and discharges it as clean air to the outside.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, for example, an air purifying device 3'mounted on a range hood has a water supply port 12, a fan and an exhaust port above a water retaining plate 8'having a large number of vent holes 7. (Not shown) respectively, the tank 20 is provided below the water retaining plate 8 ', and the contaminated air suction port 23 is provided on the front surface of the tank 20 so that the water is supplied from the water supply pipe 4 through the water inlet 12 to the water retaining plate 8'. By dropping a part of the water supplied to the inside of the tank 20 from the ventilation hole 7 of the water retaining plate 8 ′, the contaminated air passing through the ventilation hole 7 on the water retaining plate 8 ′ and the water supply are brought into contact with each other for bubbling. It is known to generate water to separate water containing oil from the air. 1 in the figure
Reference numeral 1 denotes a collision plate, which is used to separate water or oil contained in the air after bubbling from the air.

[0003]

By the way, since the conventional water retaining plate 8'has a large number of ventilation holes 7 formed over the entire surface, the amount of water falling per unit time increases, and therefore,
When operating the hood, it is necessary to continuously supply water to maintain bubbling so that the oil collection performance does not deteriorate, and as a result, the amount of water supply increases and the power consumption of the solenoid valve (energization during water supply) also increases. The running cost is high, and when starting the bubbling, more water is needed than the water required to continue bubbling, and the initial water supply device (solenoid valve, piping, constant flow valve, timer) is used. There is a problem that the cost is increased.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to reduce the amount of water supply and the power consumption while improving the oil collection efficiency. Another object of the present invention is to provide a purifying device, and another object thereof is to provide an air purifying device capable of preventing the inside of a tank and a drain pipe from being contaminated.

[0005]

In order to solve the above problems, the present invention provides a water supply port 12 above a water retaining plate 8 having a plurality of ventilation holes 7 and a tank 20 below the water retaining plate 8. In addition, the air passage 2 between the tank 20 and the water retaining plate 8
2 is provided with a suction port 23 for sucking the contaminated air, and a part of the water supplied from the water supply port 12 onto the water retaining plate 8 is retained by the water retaining plate 8.
By dropping it into the tank 20 from the ventilation hole 7 of
In the air purification device in which the contaminated air passing through the ventilation hole 7 and the feed water are brought into contact with each other on the water retaining plate 8 to cause bubbling, and water containing oil or the like is separated from the air, one side of the water retaining plate 8 is provided. A plurality of ventilation holes 7 are formed close to each other, and the remaining portion of the water retaining plate 8 is used as a non-ventilation portion 9 without the ventilation hole 7 to increase the amount of water supplied from the water inlet 12 to the water retaining plate 8 only at the time of starting and during operation. The feature is that a water amount switching means 17 for switching the water amount so as to reduce the water supply amount is provided.

A suction port 23 for sucking polluted air is provided in the tank 20 in the air passage 22 between the tank 20 and the water retaining plate 8, and a drain port 21 is provided at a position near the suction port 23 of the tank bottom 20a. Is preferred. The tank bottom 20a
It is preferable to incline so that it becomes lower toward the front F. It is preferable that the ventilation holes 7 are formed in the shape of an elliptical hole with rounded corners and are arranged in parallel in a zigzag pattern on the water retaining plate 8.

[0007]

According to the present invention, a plurality of ventilation holes 7 are formed close to one side of the water retaining plate 8 and the remaining portion of the water retaining plate 8 is the non-vented portion 9 without the ventilation holes 7 and the water supply port is provided only at the time of starting. 12
To the water retaining plate 8 to increase the amount of water supplied to the water retaining plate 8 and to switch the amount of water so that the amount of water supplied decreases during operation.
Since most of the water supply on the water retaining plate 8 is stored on the non-ventilated portion 9 of the water retaining plate 8 at the time of start-up, a part of the water supply is formed on one side of the water retaining plate 8 to form a plurality of ventilation holes 7 To the tank bottom 20a, the contaminated air passing through the ventilation holes 7 on the water retaining plate 8 comes into contact with the water supply, and bubbling starts. Therefore, even if the water supply amount is switched to be small during operation, it is possible to store the water supply on the water retaining plate 8 for a long time, and when bubbling becomes weak during operation,
By supplying water to such an extent that bubbling can be maintained, bubbling can be continued and there is no risk that oil collection efficiency will decrease.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the air purifying device 3 attached to the range hood of the kitchen is illustrated. 1, a fan 2 and an exhaust port 10 are provided above the hood 1, an air purifying device 3 is provided at the rear of the hood 1, and a water supply pipe 4 and a drain pipe 5 are provided below the hood 1.

The air purifying device 3 is provided with a water retaining plate 8 having a plurality of ventilation holes 7 on the bottom of a box body opened upward, and each ventilation hole 7 is as shown in FIG. 2 (a). , Water retaining plate 8
The ventilation holes 7 are formed in an oval shape with rounded corners, and are arranged on the water retaining plate 8 in a zigzag pattern. The front F side portion of the water retaining plate 8 is a non-ventilating portion 9 in which the vent hole 7 is not formed, and has a structure in which water can be stored on the water retaining plate 8 for a long time. Further, as shown in FIG. 2B, cut-and-raised portions 24 are provided around the water retaining plate 8 in order to stably generate bubbling on the water retaining plate 8, and the water retaining plate 8 and the tank 20 are provided.
Guide 2 for preventing a gap from forming in the contact area with
5 is provided at the rear end portion 20c of the tank 20.

Above the water retaining plate 8 is arranged a collision plate 11 for separating moisture containing oil and the like contained in the air after bubbling from the air. On the other hand, a tank 20 is arranged below the water retaining plate 8, a tank bottom 20a is provided with a drain port 21 connected to the drain pipe 5, and a front surface 20b of the tank 20 is provided with the tank 20 and the water retaining plate 8. A suction port 23 for sucking the contaminated air is provided in the air passage 22 between and.

Above the non-ventilated portion 9 of the water retaining plate 8,
A water supply port 12 for supplying water to the water retaining plate 8 is arranged. The water supply port 12 is connected to a starting water supply device 13 and a normal water supply device 14, respectively, and the water supply devices 13 and 14 are connected to each other.
Is a first built-in constant flow valve and strainer (not shown)
And is connected to the water supply pipe 4 via the second solenoid valves 15 and 16. The solenoid valves 15 and 16 are set so that the first solenoid valve 15 has a smaller amount of water supply per unit time than the second solenoid valve 16 in the open state. An operation switch 18 is provided on the front surface of the hood 1, and a signal from the operation switch 18 is sent to the control unit 19 (FIG. 3). The control unit 19 has a built-in water amount switching means 17 for increasing the amount of water supplied from the water inlet 12 to the water retaining plate 8 only at the time of starting and reducing the amount of water supplied during operation.

The water quantity switching means 17 is composed of a timer circuit in this embodiment. This timer circuit energizes only the first electromagnetic valve 15 to supply water from the starting water supply device 13 at the time of starting the hood, for example, and thereafter stops energization of the first electromagnetic valve 15 during operation, The second solenoid valve 16 is configured to be controlled to be repeatedly turned on and off to intermittently supply water from the normal water supply device 14. The time setting of the timer circuit is set by confirming in advance the time from the start to the time when bubbling becomes weak in an experiment. Further, weakening of bubbling is detected using a pressure sensor 30 (FIG. 3) for wind pressure detection, and control is performed so that the second solenoid valve 16 is energized based on a signal from the pressure sensor 30. May be Here, in order to continue the bubbling during the operation, the water retaining plate 8 is controlled so that the wind velocity passing through the ventilation holes 7 of the water retaining plate 8 is at least 3.5 m / s or more (preferably about 5 m / s or more). It is preferable to design the opening area of each ventilation hole 7.

Therefore, when the operation switch 18 is turned on, the fan 2 starts rotating and at the same time, the controller 19 energizes the first solenoid valve 15. As a result, at the time of start-up, a large amount of water is supplied from the starting water supply device 13 onto the non-ventilated portion 9 of the water retaining plate 8, and this water supply is stored on the water retaining plate 8 for a long time, while part of the water supply is retained by the water retaining plate 8. It will fall to the tank bottom 20a from the plurality of ventilation holes 7 formed closer to the rear part, and the contaminated air passing through the ventilation holes 7 on the water retaining plate 8 will come into contact with the water supply to start bubbling and to remove the oil content. The contained water is separated from the air. In this way, by increasing the amount of water supplied to the water retaining plate 8 only at the time of starting, most of the water supply is collected on the non-ventilated portion 9 of the water retaining plate 8 so that the amount of water supplied decreases during operation as described later. Even if it is switched to, it becomes possible to store the water supply on the water retaining plate 8 for a long time. Further, by providing the cut-and-raised portion 24 around the water-retaining plate 8, bubbling on the water-retaining plate 8 can be stably generated, and the guide 25 covering the cut-and-raised portion 24 immediately above is provided at the rear end portion 2 of the tank 20.
Since it is provided at 0c, it is possible to prevent a gap from being formed in the contact portion between the water retaining plate 8 and the tank 20, and to prevent the water supply on the water retaining plate 8 from leaking out from a portion other than the vent hole 7, It is possible to prevent a sharp drop in water supply.

Then, after a lapse of a fixed time set by the timer circuit of the water quantity switching means 17 from the time of start-up, or when the pressure sensor for wind pressure detection (FIG. 3) detects that bubbling is weakened. The water amount switching means 17 controls energization so that the second solenoid valve 16 is repeatedly turned on and off. That is, in comparison with the conventional example which constantly supplies a constant amount of water during operation, in this embodiment, a large amount of water is supplied only at the time of starting, and only when bubbling becomes weak during operation,
The bubbling can be continued by supplying the water from the water supply device 14 to the water supply port 12 so that the bubbling does not disappear. As a result, the amount of water supply is small during operation, the power consumption of the solenoid valves 15 and 16 (energization during water supply) can be saved, and the oil collection efficiency can be improved while reducing the running cost and initial cost. it can.

When water is supplied, the amount of water on the water retaining plate 8 increases,
The amount of water falling on the lower surface of the tank 20 automatically increases due to its own weight, and the water that has dropped from the ventilation holes 7 of the water retaining plate 8 to the lower surface of the tank 20 is cleaned inside the tank 20 and the drain pipe 5, It is drained from a drain port 21 provided on the tank bottom 20a.
After that, when the operation switch 18 is turned off, the power supply to the fan 2 and the solenoid valve 16 is stopped, the bubbling disappears,
All the water on the water retaining plate 8 falls to the tank bottom 20a and is discharged together with the dirt in the tank 20 and the drain pipe 5.

As another embodiment of the present invention, as shown in FIG. 4 (a), a suction port 23 for polluted air is provided on the front surface 20b of the tank 20, and a position (front side) of the tank bottom 20a near the suction port 23 (front side). The drain port 21 may be provided at the position). In this case, as shown in FIG. 4 (b), it is preferable to incline the tank bottom 20a so as to be lower toward the front F.

Incidentally, in the prior art (FIG. 6), when the hood is operated, the water pressure does not spread to the front F of the tank 20 due to the wind pressure from the suction port 23, and the background air in the front F of the tank 20 collides directly with the contaminated air and becomes dirty. Are attached, and the tank bottom 20a is easily soiled, and there is a possibility that odors and miscellaneous bacteria may propagate, which is unfavorable for hygiene. On the other hand, in this embodiment, as shown in FIG. 4 (a), the drainage port 21 of the tank bottom 20a is arranged in the forward direction, so that the water after use is not stored in the tank 20. be able to. That is, when the operation switch 18 is turned on, bubbling starts at the same time when the fan 2 starts to rotate, and a part of the water supply on the water retaining plate 8 drops to the lower surface of the tank 20 and the drain port 21 provided near the front F. However, it is pushed to the rear side (back side) of the tank 20 by the wind pressure from the suction port 23, and the tank bottom 2
The water level of 0a rises, and the tank bottom 20a is covered with water. Therefore, the contaminated air sucked from the suction port 23 is
By colliding with the water accumulated in a and gradually replacing it with clean water that is regularly supplied, it becomes possible to prevent the inside of the tank 20 and the drain pipe 5 from becoming dirty. Moreover, since the drainage port 21 is located near the suction port 23, after the fan 2 is stopped, the water that has been pushed backward spreads to the front F and is drained from the drainage port 21 together with dirt. It is possible to effectively prevent dirt from adhering to the bottom 20a. Further, when the tank bottom 20a is inclined downward to the front F as shown in FIG. 4B, the water dropped from the water retaining plate 8 vigorously flows toward the front F of the tank 20 and is sucked from the suction port 23. It becomes easier to collide with the contaminated air and the cleaning effect is further enhanced.

As still another embodiment of the present invention, as shown in FIG. 5, it is preferable that the water-retaining plate 8 has a hole-like shape such that the bubbling holding time is long. Specifically, as shown in FIGS. 5 (a) and 5 (b), a large number of vent holes 7 (3 mm × 2) are provided near the rear portion of the water retaining plate 8 having a depth of about 100 mm.
It is preferable that a large number of long holes with rounded corners having a size of about 0 mm are arranged side by side in a zigzag pattern, and further, the hood 1 is installed so that the opening direction and the long sides of the long holes are parallel to each other. preferable.

By the way, when bubbling a part of the water supply on the water retaining plate 8 while dropping it on the tank bottom 20a, a large amount of water falls depending on the hole shape of the water retaining plate 8, and the bubbling caused by one water supply is increased. Does not continue, the oil collection efficiency decreases, or conversely water does not drop at all,
There is a possibility that the pressure loss becomes large, a large noise is generated, or the inside of the tank 20 or the drain pipe 5 cannot be completely prevented from being contaminated.

On the other hand, in this embodiment, as shown in FIG.
As shown in (b), the water-retaining plate 8 is formed in the shape of an elliptical hole with rounded corners so that the bubbling retention time is long, so the amount of water dropped is small and the amount of water supply can be reduced accordingly. At the same time, it is possible to further reduce the power consumption of the solenoid valves 15 and 16, and to improve the oil collection efficiency and prevent the tank bottom 20a and the drain pipe 5 from being contaminated due to a proper drop to the tank bottom 20a. Becomes Here, when the water retaining plate 8 has an oblong hole shape as shown in FIGS. 5A and 5B, the water supply time is 1.2 liters / mi at the laboratory level.
It has been found that bubbling can be started for about 5 seconds at about n, and bubbling can be continued for about 10 minutes. Experimental results are shown in Tables 1 and 2 below. Incidentally, FIG.
(C) shows the case of a round hole, and the experimental results are shown in Table 3 below.
Shown in

[0021]

[Table 1]

In Table 1, "long-hole zigzag vertical" means that the holes of (3 mm x 20 mm) are arranged in a zigzag lattice pattern and the length of the long hole in the hood opening direction when the water retention plate has an opening ratio of 43.0%. Shown is one with the sides set parallel to each other.

[0023]

[Table 2]

In Table 2, "Long hole zigzag side" means that the holes (3 mm x 20 mm) are arranged in a zigzag pattern and the hood opening direction and the long side of the hole are 43.0% of the water retaining plate. Shows what is set at right angles.

[0025]

[Table 3]

In Table 3, "Mound hole Chidori" indicates a water retention plate porosity of 5
At 1.0%, the holes (D: 3 mm · P: 4 mm) are arranged in a zigzag pattern.

[0027]

As described above, according to the first aspect of the invention, a plurality of ventilation holes are formed close to one side of the water retaining plate, and the remaining portion of the water retaining plate is a non-venting portion having no ventilation hole. Since the water quantity switching means is provided to increase the quantity of water supplied from the water supply port to the water retaining plate and to reduce the water quantity during operation, the water retaining plate can be increased by increasing the amount of water supplied to the water retaining board during startup. Most of the water supply collects on the non-ventilated part of the tank, the amount of water that falls into the tank decreases, and it is possible to store water for a long time on the water retaining plate even if the water supply is reduced during operation. Also, when bubbling becomes weak during operation, bubbling can be continued by supplying water to the extent that bubbling can be maintained by the water amount switching means, and a constant amount of water is always supplied during operation as in the past. Compared to the case, the amount of water supply is small, the power consumption of the solenoid valve (energization at the time of water supply) can be saved, the running cost and initial cost can be reduced, and the oil collection efficiency can be improved. Play.

Further, the invention of claim 2 is provided with a suction port for sucking polluted air in the tank in the air passage between the tank and the water retaining plate of claim 1, and drains water at a position near the suction port on the bottom of the tank. Since the mouth is provided, in addition to the effect according to claim 1, when a part of the water supply on the water retaining plate falls to the lower surface of the tank and flows to the drain outlet provided near the front, this water is discharged from the suction inlet. Is pushed to the rear part of the tank by the wind pressure, and the water level at the bottom of the tank rises, so that the water covers the bottom of the tank. Therefore,
The polluted air sucked from the suction port collides with the water accumulated at the bottom of the tank and is replaced little by little with the clean water that is regularly supplied, so that the inside of the tank and the drainage pipe can be effectively prevented from becoming dirty.

Further, in the invention of claim 3, since the tank bottom of claim 2 is inclined so as to be lower toward the front, in addition to the effect of claim 2, the water dropped from the water retaining plate is directed to the front of the tank. Flowing vigorously, it becomes easier to collide with the contaminated air sucked from the suction port, it becomes easier to replace the clean water that is regularly supplied, and it is possible to prevent dirt in the tank and drain pipe more effectively. it can.

In the invention of claim 4, the ventilation holes of claim 1 are formed in the shape of an elliptical hole with rounded corners and are arranged side by side in a zigzag pattern on the water retaining plate. In addition, the aperture shape of the water retaining plate becomes a shape that makes the bubbling retention time longer, and accordingly, the amount of water supply becomes smaller and the power consumption of the solenoid valve can be further reduced, further reducing the cost. Can be planned.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a range hood including an air purification device according to an embodiment of the present invention.

FIG. 2 (a) is a perspective view of the same water retaining plate, and FIG. 2 (b) is a cross-sectional view near the rear part of the tank.

FIG. 3 is a block diagram related to the control unit of the above.

FIG. 4A is a schematic cross-sectional view of another embodiment of the present invention,
(B) is a schematic sectional view of a main part of still another embodiment.

FIG. 5 (a) is a plan view showing an example of the shape of the ventilation holes of the water retaining plate, and FIGS. 5 (b) and 5 (c) are partial plan views showing other examples of the shapes of the ventilation holes of the water retaining plate. It is a figure.

FIG. 6 is a schematic sectional view illustrating a conventional air purification device.

[Explanation of symbols]

 7 Vent hole 8 Water retaining plate 9 Non-ventilated part 12 Water supply port 17 Water amount switching means 20 Tank 20a Tank bottom 21 Drain port 22 Air passage 23 Suction port

Claims (4)

[Claims] 1. A water supply port is provided above a water retaining plate having a plurality of ventilation holes, a tank is provided below the water retaining plate, and suction is provided for sucking polluted air into an air passage between the tank and the water retaining plate. An opening is provided, and part of the water supplied from the water supply port onto the water retaining plate is dropped into the tank from the ventilation hole of the water retaining plate, so that the contaminated air passing through the ventilation hole on the water retaining plate comes into contact with the water supply. Bubbling is generated to separate water containing oil etc. from the air,
Form a plurality of ventilation holes close to one side of the water retaining plate and make the remaining part of the water retaining plate a non-vented part without ventilation holes, increasing the amount of water supplied from the water inlet to the water retaining plate only at the time of starting and during operation. An air purification apparatus comprising a water amount switching means for switching the water amount so that the water supply amount is reduced. 2. A suction port for sucking polluted air is provided in the tank in an air passage between the tank and the water retaining plate, and a drain port is provided at a position near the suction port on the bottom of the tank. Item 1. The air purification device according to item 1. 3. The air purifying apparatus according to claim 2, wherein the tank bottom is inclined so as to be lower toward the front. 4. The air purifying apparatus according to claim 1, wherein the ventilation holes are formed in the shape of an elliptical hole with rounded corners and are arranged in parallel in a zigzag pattern on the water retaining plate.