JP2000186842A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner which is able to effectively remove oil components contained in air to be cleaned at a cleaning portion in accordance with switching of the operational mode of a low/high speed suction fan, prevent vanes or the like of the suction fan from being smudged with oil or the like, and improve conveniency of use. SOLUTION: A cleaning portion 2 is formed in a vent path A of a hood body 5. Air to be cleaned is sucked by a suction fan 6 through the vent path A, followed by cleaning and exhaustion, while the velocity of the suction fan 6 can be changed over. An opening varying means 7 for varying the opening area of the vent path A is provided, so that the opening area of the vent path A is increased or decreased in correspondence with the rotational speed of the suction fan 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus which is installed mainly on cooking equipment in a kitchen and which purifies and exhausts air to be purified such as oily smoke generated during cooking.

[0002]

2. Description of the Related Art In recent years, an air purifying apparatus that suctions, purifies, and exhausts air to be purified, such as oil smoke generated during cooking in a kitchen or the like, has become widespread even at home. This type of air purification device is generally called a range hood, and is installed above a range base, which is cooking equipment provided in a kitchen.

In the above-mentioned air purifying apparatus, for example,
Short slit-shaped openings 3a, 4a (not shown) formed of a metal plate material such as a stainless steel as shown in FIG. The two perforated plates 3 and 4 arranged in a row are connected to the respective openings 3a and 4a and the non-openings 3b and 4 other than the same openings.
b (not shown) in parallel with each other so as to face each other.
Are formed. Then, air to be purified such as oil smoke generated during cooking is sucked through the above-described ventilation path by the intake fan provided in the hood main body, and is ventilated to the perforated plates 3 and 4 to purify the air and through the air duct. Exhaust to the outside.

Therefore, in the perforated plates 3 and 4,
The oil component having a large mass in the air to be purified is accelerated at the opening 3a of the first perforated plate, collides with the second non-opening 4b, and is captured and purified. The oil components adhering to the surfaces of the perforated plates 3 and 4 need to be cleaned and washed off at regular intervals using a detergent or the like.
As shown in FIG. 9, most of the purifying units 2 are installed in the air purifying apparatus 1 at an angle, and the lower edge thereof is
An oil pan C is provided for collecting and collecting the captured oil components. Therefore, most of the trapped and collected oil is collected in the oil receiver C and discarded.

[0005]

However, in the above-mentioned prior art, all the oil components contained in the air to be purified are not removed by the purifying section 2 using the perforated plates 3 and 4, and as a result, the exhaust gas is exhausted. The oil component will be slightly contained in the air. In addition, in many cases, the above intake fan is required to have the maximum number of revolutions required for normal purification operation, which is required from the calorific value of a combustion appliance such as a range, and which can realize the ventilation amount specified by the Building Standards Law. The air volume can be switched between a high-speed operation mode and a low-speed operation mode, and the blades inside are rotated to purify air and exhaust the air.

[0006] However, it has been found that when the low-speed operation mode is used frequently, a part of the oil component contained in the exhausted air adheres to the blades of the intake fan.
That is, in the air purification device, a large amount of an oil component and dust or the like attached to the oil may adhere to the blade body,
There has been a problem that the suction amount of the air to be purified which is sucked and exhausted by the intake fan in the hood body is reduced, and the wind noise generated by the blades increases, thereby increasing the noise during the cleaning operation. In this case, it is conceivable that the user cleans the intake fan together with the perforated plates 3 and 4, but it takes much time and effort to remove dirt such as oil and dust attached to the blades of the intake fan. In addition, when the cleaning is neglected for a long period of time, the wear of the bearing of the motor driving the blade body is increased, and the life of the intake fan may be shortened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the effect of the oil component contained in the air to be purified in the purifying section according to the switching of the operation mode of a high-speed and low-speed intake fan. It is an object of the present invention to provide an air purifying device which can be removed in a practical manner and the blades of the intake fan are hardly stained by oil or the like, and thus the usability is improved.

[0008]

In order to achieve the above object, in the air purifying apparatus of the present invention, a purifying section is formed in a ventilation passage of a hood body, and the air to be purified is passed through the ventilation passage. The air purifying device is configured to change the opening area of the ventilation path by providing an opening change means for changing the opening area of the ventilation fan. It is characterized in that the opening area of the ventilation path is enlarged or reduced in accordance with the speed.

In this case, a purifying section is formed in the hood main body ventilation passage, and the air to be purified is suctioned and ventilated by the intake fan through the ventilation passage to purify and exhaust the air. The opening area of the road is enlarged and reduced by the opening changing means in accordance with the rotation speed of the intake fan whose rotation speed is switchable.

[0010] The intake fan can be switched between two operation modes so that the rotational speed of the intake fan becomes a high-low speed, and the opening changing means opens and closes a part of the exhaust-side ventilation passage of the purification unit. As the damper, it is preferable that the intake fan be in an open state when the high-speed operation mode is used, and be closed when the intake fan is in the low-speed operation mode.

In this case, the damper which opens and closes a part of the exhaust-side ventilation passage of the purifying section corresponding to the opening changing means can be switched between two operation modes so that the rotation speed becomes a high-low speed. The intake fan is opened in the high-speed operation mode and closed in the low-speed operation mode to increase or decrease the opening area of the air passage.

The lower part of the damper is swingable, and is vertically suspended above the purifying portion so as to move upward during a high-speed operation mode of the intake fan, and opens and closes a part of the ventilation path. In this case, it is preferable to prevent the swing of the intake fan during the low-speed operation mode.

In this case, a damper whose lower portion is vertically suspended above the purifying section so as to be swingable and is provided so as to prevent the swing of the intake fan in a low-speed operation mode is provided. At the time of the high-speed operation mode, it moves upward to open and close a part of the ventilation path, and enlarges or reduces the opening area of the ventilation path.

Further, it is preferable that the ratio of the opening area expansion and contraction of the air passage is substantially the same as the change ratio of the suction amount of the air to be purified.

In this case, the ratio of the expansion and contraction of the opening area of the ventilation path is made substantially the same as the change ratio of the suction amount of the air to be purified.
The opening area of the air passage is enlarged or reduced.

[0016]

1 to 7 show an embodiment corresponding to all of claims 1 to 4 of the present invention, and FIG.
It is a schematic structure figure showing the air purifying device of one embodiment of the present invention. FIG. 2 is a perspective view showing a perforated plate of the air purification device. FIG. 3 is an explanatory diagram of a perforated plate of the air purification device. FIG. 4 is an explanatory diagram of an opening changing means of the air purification device. FIG. 5 is an explanatory diagram of a relationship between a hole passing speed and an oil collecting performance of the air purification device. FIG. 6 is an explanatory diagram of the relationship between the suction amount of the air to be purified and the opening area of the air purification device. FIG. 7 is an explanatory diagram of the relationship between the air passage area expansion and contraction of the air purification device and the oil exposure amount.

In the air purifying apparatus 1 of this embodiment, a purifying section 2 is formed in an air passage A of a hood main body 5, and the air passage A
In the air purifying apparatus 1 in which the air to be purified is suctioned and ventilated by the intake fan 6 to purify the air and exhausted, and the rotation speed of the intake fan 6 can be switched, the opening area of the ventilation path A is changed. The opening changing means 7 is provided, and the opening area of the ventilation path A is enlarged and reduced in accordance with the rotation speed of the intake fan 6.

In the air purifying apparatus according to this embodiment, the intake fan 6 can be switched between two operation modes so that the rotational speed of the intake fan 6 becomes high and low. As the damper 7 that opens and closes a part of the exhaust-side ventilation path 2, the intake fan 6 may open the damper 7 in the high-speed operation mode, and may close the damper 7 in the low-speed operation mode. . In the air purifying apparatus 1 of this embodiment, the damper 7 is vertically suspended above the purifying section 2 so that the lower portion thereof can swing and move upward when the intake fan 6 is in the high-speed operation mode. Then, a part of the ventilation path A is opened and closed, and the swing of the intake fan 6 is prevented in the low-speed operation mode.
Further, in the air purification device 1 of the embodiment, the ratio of the opening area expansion / contraction of the ventilation path A is substantially the same as the change ratio of the suction amount of the air to be purified.

More specifically, the air purifying apparatus 1 is installed in a kitchen such as a house, for example, and as shown in FIG.
The air is purified by suctioning the air into the outside 1 through the air duct 9.
2, the perforated plates 3, 4 corresponding to the purifying section 2.
, A hood body 5, an intake fan 6, and an opening changing means 7
And an electromagnetic solenoid 8 which is a means for preventing the damper 7 from swinging. The electromagnetic solenoid 8 is controlled by a control unit (not shown) formed, for example, including a microcomputer.

In this case, the perforated plates 3 and 4 are substantially the same as those described in the prior art shown in FIG. 8 and are formed of a metal plate material such as stainless steel, and as shown in FIG. The openings 3a, 4a are arranged in a row on one surface. As shown in FIG. 3, the perforated plates 3, 4 have respective openings 3a,
The purifying portion 2 is formed by juxtaposing the inside of the air passage A of the hood main body 5 so that the opening 4a and the non-opening portions 3b and 4b other than the opening portions 3a and 4a face each other.

The intake fan 6 sucks air in the kitchen, which is indoors, through a ventilation path A indicated by an arrow in FIG. The air is exhausted to the outdoor 12 through the air duct 9, and is formed of, for example, a sirocco fan. The entire periphery of the blade body 61 of the intake fan 6 is covered with a fan case 62.
The air inlet A is formed on the front surface, and the outlet is formed on the upper surface.

In order to facilitate the separation of the oil adhering to the surface of the blade body 61 in the cleaning operation by centrifugation,
For example, a paint having high oil repellency such as a silicone paint or a fluororesin paint may be applied. In addition, in this case, an oil drainage hole 63 is formed at the rear side of the bottom surface of the fan case 62 which is slightly inclined rearward. Immediately below the oil drainage hole 63, a detachable dish-shaped oil receiving portion is provided. 52 and lighting device 53
However, a part of the partition plate 51 of the hood main body 5 is cut out and provided.

The intake fan 6 has a maximum air flow in a normal purifying operation at a rotational speed capable of realizing a ventilation amount required by the heat generation amount of a combustion appliance such as the range 10 and the like, which is required by the Building Standards Law. By rotating the blade 61, the air is purified and exhausted. The intake fan 6 switches connection with capacitors having different capacities for changing the power factor of the motor drive circuit by, for example, a switching operation using an operation switch 54 provided on the front surface of the hood main body 5, so that two high and low stages are provided. The mode can be switched to the speed operation mode.

The damper 7 is an opening changing means 7 for expanding / contracting the opening area of the air passage A. In this case, the damper 7 is made of a synthetic resin.
As shown in the figure, the shaft 71 supports the upper part of the perforated plate 4 on the exhaust side of the purification unit 2, and about 1/3 of the ventilation path A can be opened and closed by the wind of the intake fan 6. Therefore, the lower part thereof is vertically suspended so as to be swingable.

The electromagnetic solenoid 8 is a swing preventing means for preventing the lower part of the damper 7 from swinging. The electromagnetic solenoid 8 is controlled by the control unit, and when the intake fan 6 is in the low-speed operation mode, FIG.
As shown in FIG. 4, the shaft 81 protrudes toward the damper 7 to prevent its swing, and when the intake fan 6 is in the high-speed operation mode,
As shown in (b), the damper 7 projects to the opposite side of the damper 7 so as to move upward.

The air purifying apparatus 1 described above performs a hood operation during a purifying operation for purifying air, ie, when exhausting oil smoke 11 and the like generated during cooking in the range 10 to the outdoor 12 through the air duct 9. By operating the intake fan 6 provided in the main body 5, the air to be purified including the oil smoke 11 and the like is formed by the perforated plates 3 and 4 provided in the intake side ventilation passage A in the hood main body 5. It is sucked through the purified unit 2. Then, the perforated plates 3 and 4 are juxtaposed so that the openings 3a and 4a and the non-openings 3b and 4b face each other, so that the oil component in the air to be purified is the first sheet. Is accelerated at the opening 3a of the perforated plate 3, and collides with the non-opening 4b of the second perforated plate 4 to be captured and purified.

Further, such an air purifying apparatus 1 has the structure shown in FIG.
As shown in the figure, the opening 3 of the perforated plate 3 is
When the passage speed of the air to be purified in the vicinity of a exceeds 6.5 m / s, an oil collection performance of approximately 80% can be obtained, and the passage speed of the hole so as to further increase the suction amount of the air to be purified is obtained. It has been found from experiments that even if the pressure is increased, only the pressure loss in the purification section 2 increases and the oil collecting performance does not increase. That is, in order to efficiently collect the oil component with a low pressure loss in the purification unit 2 as described above, the passage speed of the air to be purified is 6.5 m.
/ S is effective.

For example, the suction amount of the air to be purified in the high-speed operation mode is approximately 450 cubic meters / hour, and the suction amount of the air to be purified in the low-speed operation mode is approximately 300 cubic meters / hour.
In order to efficiently collect oil components, as shown in FIG. 6, the ventilation path A is set to 192 cm 2 in the high-speed operation mode and 128 in the low-speed operation mode.
By setting the ratio of the opening area expansion and contraction to be approximately the same as the change ratio of the suction amount of the air to be purified as a square centimeter, the air passage speed of the air to be purified can be maintained at about 6.5 m / s.

In the case of a range hood such as the air purifying apparatus 1, the low-speed operation mode is used more frequently than the high-speed operation mode. It is understood from the survey results that it is about 0.5. Therefore, on the premise of this use frequency ratio, the ratio of the opening area expansion / contraction of the ventilation passage is determined by the change rate of the suction amount of the air to be purified, that is, the suction amount of the air to be purified in the high-speed operation mode is approximately 450 cubic meters /.
, The suction amount of the air to be purified in the low-speed operation mode is approximately 300.
A damper that opens and closes a part of the exhaust-side ventilation passage of the purification unit 2 in accordance with the operation of the intake fan 6 that can be switched between two operation modes so that the rotation speed is set to two high and low speeds. 7 by operating the intake fan 6 in an open state in the high-speed operation mode and in a closed state in the low-speed operation mode,
FIG. 7 is a table showing the amount of oil exposure after the purification unit 2 when the opening area of the ventilation path A is enlarged and reduced at substantially the same ratio.

That is, in the air purifying apparatus 1 described above, the lower portion is vertically suspended above the purifying section 2 so as to be swingable, and the swing is prevented when the intake fan 6 is in the low-speed operation mode. Can move upward during the high-speed operation mode of the intake fan 6 so that approximately one third of the ventilation path A can be easily opened by the wind force. In the operation mode, the electromagnetic solenoid 8 is operated by the control unit to protrude the shaft 81 to the damper 7 side to prevent the shaft 81 from swinging.
About / 3 is closed. In this way, by maintaining the velocity of the air to be purified near the openings 3a, 4a (holes) of the perforated plates 3, 4 at about 5 m / s or more, the oil exposure is reduced by about 35% from the previous oil exposure. Further, by expanding and reducing the opening area of the ventilation path A at substantially the same ratio in accordance with the suction amount of the air to be purified, the oil exposure amount can be further reduced by about 18%.

The means for preventing the swing of the damper 7 may be of various constructions other than those described above. For example, the damper 7 may be made of a steel plate and magnetically attached to prevent the swing of the intake fan 6 in the low-speed operation mode. Can be adopted.

Therefore, the air purification device 1 described above
According to the air purifying device 1, the purifying unit 2 is formed in the air passage A of the hood body 5, and the air to be purified is suctioned and ventilated by the intake fan 6 through the air passage A to purify the air and exhaust the air. Since the opening area of the ventilation path A is expanded / contracted by the opening changing means 7 in accordance with the rotation speed of the intake fan 6 whose rotation speed is switchable, it is included in the air to be purified by the purification unit 2. The oil component to be removed can be effectively removed in accordance with the switching of the operation mode of the high-speed and low-speed intake fans 6, and the blades of the intake fan 6 are less likely to be contaminated with oil or the like, thereby improving usability.

The damper 7 corresponding to the opening changing means 7 for opening and closing a part of the exhaust-side ventilation passage of the purifying section 2 can be switched between two operation modes so that the rotation speed becomes a high-low speed. The opened intake fan 6 is set to the open state in the high-speed operation mode and the closed state in the low-speed operation mode.
Is enlarged or reduced, the opening area of the ventilation path A is enlarged or reduced corresponding to the operation mode of the two intake fans 6, and the rotation speed of the intake fan 6 and the opening area of the ventilation path A can be easily corresponded. In addition, the purifying unit 2 is configured so that its lower part can swing freely.
And a damper 7 that is provided above the air intake fan 6 so as to prevent the swing of the intake fan 6 during the low-speed operation mode.
However, when the intake fan 6 is in the high-speed operation mode, the intake fan 6 moves upward to open and close a part of the ventilation path and expands / contracts the opening area of the ventilation path A. Therefore, the area of the ventilation path A can be enlarged / reduced with a simple configuration. . Further, the ratio of the opening area of the air passage A is made substantially the same as the change ratio of the suction amount of the air to be purified, and the opening area of the air passage A is expanded or contracted. Therefore, high oil collecting performance can be maintained even if the pressure changes, and thus the usability can be further improved.

[0034]

The air purifying apparatus of the present invention is embodied as in the above-described embodiment, in which a purifying section is formed in the air passage of the hood main body, and the air to be purified is passed through the air passage by the intake fan. In the air purifying apparatus in which the air is suctioned and purified, and the air is purified and exhausted, the opening area of the ventilation path is expanded and contracted by the opening changing means in accordance with the rotation speed of the intake fan whose rotation speed is switchable. In the purifying section, the oil component contained in the air to be purified can be effectively removed in accordance with the switching of the operation mode of the high-speed and low-speed intake fans, and the blades of the intake fan are hardly contaminated with oil or the like. To improve usability.

The damper for opening and closing a part of the exhaust-side ventilation passage of the purifying section corresponding to the opening changing means has an intake air which can be switched between two operation modes so that the rotation speed becomes a high-low speed. The fan is open during the high-speed operation mode,
In the low-speed operation mode, the closed state is set, and the opening area of the ventilation path is enlarged and reduced. Therefore, the opening area of the ventilation path is enlarged and reduced corresponding to the operation mode of the two intake fans, so that the rotation speed of the intake fan and the ventilation path can be easily adjusted. With the opening area of

A damper, whose lower part is vertically suspended above the purifying section so as to be swingable, is provided so as to prevent the swing during the low-speed operation mode of the intake fan.
In the high-speed operation mode of the intake fan, the intake fan moves upward to partially open and close the ventilation path, so that the area of the ventilation path can be enlarged and reduced with a simple configuration.

Further, the ratio of the opening area expansion and contraction of the air passage is made substantially the same as the change ratio of the suction amount of the air to be purified, and the opening area of the air passage is expanded and contracted. Therefore, high oil collecting performance can be maintained even if the temperature changes, and thus the usability can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an air purification device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a perforated plate of the air purification device.

FIG. 3 is an explanatory diagram of a perforated plate of the air purification device.

FIG. 4 is an explanatory view of an opening changing means of the air purification device.

FIG. 5 is an explanatory diagram of a relationship between a hole passing speed and an oil collecting performance of the air purification device.

FIG. 6 is an explanatory diagram of a relationship between a suction amount of air to be purified and an opening area of the air purification device.

FIG. 7 is an explanatory diagram showing a relationship between expansion and contraction of an air passage area of the air purification device and an oil exposure amount.

FIG. 8 is a perspective view showing a perforated plate of an air purifying apparatus as a conventional example of the present invention.

FIG. 9 is an explanatory diagram of a perforated plate of the air purification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air purification apparatus 2 Perforated plate (purification part) 5 Hood main body 6 Intake fan 7 Damper (opening change means) 8 Oil receiving part A Air passage

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L056 BG02 3L058 BK04 BK09 4D031 AB02 AB22 BA01 BB01 BB10 EA01

Claims (4)

[Claims] 1. A purifying section is formed in an air passage of a hood main body, and air to be purified is suctioned and ventilated by an intake fan through the air passage to purify air and exhaust the air, and the rotation speed of the air intake fan is reduced. An air purifying apparatus capable of switching, wherein an opening changing means for changing an opening area of an air passage is provided, and an opening area of the air passage is enlarged and reduced in accordance with a rotation speed of an intake fan. Purification device. 2. An intake fan that can be switched between two operation modes so that a rotation speed of the intake fan becomes a high-low speed.
The opening changing means is a damper that opens and closes a part of the exhaust-side ventilation passage of the purifying section, and the intake fan opens the damper in a high-speed operation mode and closes the damper in a low-speed operation mode. The air purification device according to claim 1, wherein: 3. A damper having a lower part swingable and vertically suspended above a purifying portion so as to move upward in a high-speed operation mode of an intake fan to open and close a part of the ventilation path. 3. The air purification device according to claim 2, wherein the swing of the intake fan is prevented in a low-speed operation mode. 4. The air purification apparatus according to claim 1, wherein the ratio of the opening area expansion and contraction of the air passage is substantially the same as the change ratio of the suction amount of the air to be purified. apparatus.