JPH11182906A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a filter and the inner surface of a hood, and to prevent wash liquid from flowing down from an air intake. SOLUTION: A nozzle main body that is equipped with a nozzle is arranged inside a hood 1 to rotate by the wash liquid that is ejected by itself, and the wash liquid is sprayed from the nozzle of this nozzle main body to a filter 9 and the inner surface of the hood 1 to clean them. A shutter 20 is provided upwards of the air intake 6 of the hood 1, so as to prevent the sprayed wash liquid from flowing down to the shutter 20 and flowing down from the air intake 6. The shutter 20 is oscillated by its own weight to close the air intake 6. When a fan 2 is driven to bring a negative pressure inside the hood 1, the shutter 20 is oscillated upwards to open the air intake 6. In this way, the shutter 20 can be opened or closed automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning the inner surface of a hood and a filter of a range hood for sucking smoke, steam, odor, etc. generated during cooking and discharging the smoke to the outside.

[0002]

2. Description of the Related Art A range hood is installed above a range and sucks smoke, steam, odor, etc. (hereinafter referred to as oily smoke) generated during cooking and discharges it to the outside.

[0003] As an example of this range hood, a fan and a filter are attached to a hood for catching oil smoke, and the fan is driven to suck the oil smoke, and the oil content of the sucked oil smoke is collected by a filter to produce clean air. A device that discharges the clean air to the outside through a discharge duct or the like is known.

[0004] In the above-described range hood, oil and the like adhere to the filter, so it is necessary to periodically remove the filter from the hood and clean it. However, since the hood is mounted above the range, it is troublesome to remove the filter from the hood, and it is easy to forget to clean the filter without noticing the dirt on the filter. And cause exhaust failure.

[0005] As a range hood that solves the above-mentioned problem, there is known a range hood that cleans a filter disclosed in Japanese Patent No. 2604937, for example. This range hood is equipped with a receiving tank at the top and bottom of the filter, sends the cleaning liquid in the lower receiving tank to the upper receiving tank with a pump, and flows the cleaning liquid along the filter to remove oil adhering to the filter. And so on.

[0006]

With the above-described range hood, the filter can be cleaned with a cleaning liquid. However, in reality, not only the filter is contaminated with oil and the like, but also from the air intake port of the hood to the filter. The inside is also stained with oil.

For this reason, in the above-mentioned range hood, the user does not need to clean the filter, but the user needs to periodically clean the inner surface of the hood as in the conventional case.

Therefore, an object of the present invention is to provide a range hood which can solve the above-mentioned problems.

[0009]

According to a first aspect of the present invention, there is provided a hood 1 having an air inlet 6 and a suction port 8 and a filter 9 attached to the suction port 8; A blower 2 for sucking and discharging the cleaning liquid, a cleaning liquid jetting unit 40 disposed in the hood 1 for jetting the cleaning liquid to the filter 9 and the inner surface of the hood 1, and a unit for pressure-feeding the cleaning liquid to the cleaning liquid jetting unit 40. A shutter 20 that swings upward by the negative pressure in the hood 1 to open the air intake port 6 and swings downward to close the air intake port 6 when the inside of the hood 1 is positive pressure.
A range hood characterized by comprising:

According to a second aspect of the present invention, the vertical swing center of the shutter 20 in the first aspect of the invention is moved from the air intake port 6 to the suction port 8.
This is a range hood that is on the opposite side of the air flow direction toward.

According to a third invention, in the first or second invention, one of the hood 1 and the shutter 20 is provided with a shutter 2.
This range hood is provided with stoppers 50 and 52 that regulate the full opening angle of 0 and make the center of gravity of the shutter when fully opened close to the center of vertical swing.

[0012]

According to the first aspect of the present invention, since the cleaning liquid can be sprayed onto the inner surfaces of the filter 9 and the hood 1 to wash away oil and the like, the inner surface of the filter 9 and the hood 1 can be cleaned, and the user can clean the filter 9. It is not necessary to clean the inner surface of the hood 1 manually.

The cleaning liquid sprayed on the inner surfaces of the filter 9 and the hood 1 is prevented from leaking from the air inlet 6 by the shutter 20, and the cleaning liquid does not flow down from the hood 1. There is no.

Since the shutter 20 is opened by the negative pressure in the hood 1 and closed by the positive pressure, no special mechanism for opening and closing the shutter 20 is required. This makes the structure simple and
There is no breakdown, the weight of the hood 1 is light,
Mounting becomes easy.

When the blower 2 is driven, the pressure inside the hood 1 becomes negative pressure, and when the blower 2 stops, the pressure becomes positive. Therefore, when the range hood 1 is used, the shutter 20 is reliably opened, and when the range hood 1 is not used, the shutter 20 is opened. Since the shutter 20 is securely closed, the shutter 20 automatically opens and closes when the range hood is used or not used, so that there is no malfunction and no operation for opening and closing the shutter 20 is required.

According to the second aspect of the present invention, the shutter 20 does not hinder the air flow from the air inlet 6 to the suction port 8, and the air flow is low and the air flows smoothly. As a result, no large noise is generated in the shutter 20 or the exhaust air volume does not become insufficient, and the shutter 20 does not have to be unnecessarily high in strength without exerting an excessive force on the vertical swing center of the shutter 20. Alternatively, the shutter 20 may be made lighter so that the blowing capacity of the blower does not need to be increased more than necessary.

According to the third aspect, when the blower 2 is stopped and the pressure in the hood 1 becomes positive, the shutter 20 swings downward by its own weight and closes the air inlet 6. In addition, when the shutter 20 swings in the closing direction by a spring,
The force of the spring can be reduced, and the force at the time of opening the shutter 20 is small.
There is no need to raise to release 0.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a hood 1 and a blower 2 form a range hood. Food 1
Is a box-shaped body composed of a lower plate 3, an upper plate 4, and a peripheral plate 5, and a central portion 3a of the lower plate 3 is higher than a peripheral portion 3b, and three rectangular air portions are provided near the peripheral portion 3b of the central portion 3a. Intakes 6 are formed, and a ring-shaped rising portion 7 is integrally provided along the opening edge of each air intake 6 toward the inside of the hood 1. Specifically, the lower surface plate 3 is stamped and the periphery thereof is bent toward the inside of the hood 1. The upper surface plate 4 has a suction port 8 formed therein,
A filter 9 is attached to the suction port 8.

The lower plate 3 is slanted so that its left and right ends are lower than horizontal. Holes 10 are formed in the lower left and right ends of the lower plate 3 and are continuous with the holes 10. A cleaning liquid tank 11 is provided.

The blower 2 is provided with a fan 13 in a casing 12, and the fan 13 is driven to rotate by an electric motor 14. The inlet 15 of the casing 12 communicates with the suction port 8 of the hood 1 through the cylindrical body 16 and the outlet 17
Communicates with the duct 18.

The blower 2 is mounted on an upper surface of a ceiling panel 19, and the hood 1 is
Suspended.

The hood 1 is provided with shutters 20 for opening and closing the respective air intakes 6. The shutter 20 has a downward dish shape in which a downward piece 22 is integrally provided along a peripheral edge of a flat plate 21, and covers the rising piece 7.

The shutter 20 is, as shown in FIG.
It is attached to the rising piece 7 so as to be able to swing up and down by a shaft 23.

When the blower 2 is stopped, the pressure in the hood 1 is positive, so that the shutter 20 swings downward by its own weight to close the air inlet 6 as shown in FIG. When the blower 2 is driven, the air in the hood 1 is discharged and the pressure in the hood 1 becomes negative, and the shutter 20 swings upward to open the air inlet 6 as shown in FIG. As described above. The shutter 20
May be applied by a spring or the like in the closing direction.

The hood 1 is provided with a cleaning liquid pump 30 as a cleaning liquid pressure feeding means. The cleaning liquid pump 30 includes a motor 31, a suction part 32 having an impeller rotated by the motor 31, and a water supply pipe 33 connected to a discharge side of the suction part 32. It is immersed in.

In the hood 1, a cleaning liquid ejecting portion 40 is provided so as to face the filter 9 and the inner surface of the hood 1.
As shown in FIG.
The nozzle body 41 is rotatably attached to the tip of the water supply pipe 33 along a substantially horizontal plane.

The nozzle body 41 is provided with a filter nozzle 42 at the center in the longitudinal direction, a hood nozzle 43 near both ends in the longitudinal direction, and a rotating nozzle 44 at both ends in the longitudinal direction. The filter nozzle 42 has a shape directed upward and obliquely upward toward the filter 9, the hood nozzle 43 has a shape directed substantially horizontally toward the inner surface of the hood 1, and the rotation nozzle 44 has a horizontal position. It has a shape facing the side.

Each of the nozzles communicates with a water supply pipe 33 through a flow path (not shown) in the nozzle body 41, and the cleaning liquid is jetted from each nozzle.

The nozzle body 41 rotates as shown in FIG. 6 by the cleaning liquid spouted from the rotation nozzle 44,
The cleaning liquid spouted from the hood nozzle 43 is sequentially jetted onto the inner surface of the hood 1 and the filter nozzle 42
The cleaning liquid is ejected from the filter 9 to the filter 9.

Since the hood nozzle 43 ejects the cleaning liquid in a substantially horizontal direction after the rotation direction, a rotational force acts on the nozzle body 41 by the reaction force of the ejected cleaning liquid, and the jetted cleaning liquid is used in the nozzle body 21. And rotate smoothly.

Next, the operation will be described. When the blower 2 is driven to operate the range hood, the shutter 20 is swung upward by the negative pressure in the hood 1 to open the air inlet 6 as shown in FIG.

As a result, the oily smoke is blown into the hood 1 through the air inlet 6 together with the air as shown by the arrow in FIG. 4, is drawn into the blower 2 through the suction port 8 and the filter 9, and is drawn from the duct 18. Is discharged.

The air inlet 6 is formed near the periphery of the bottom plate 3 and the filter 9 is provided at the center of the bottom plate 3.
Flows from the periphery of the filter toward the filter 9 and the nozzle body 41 is located almost directly below the filter 9,
The above-mentioned air and oil smoke hardly collide with the nozzle main body 41, and most of them flow directly toward the filter 9.

Thus, since the nozzle body 41 does not obstruct the flow of the oil smoke, the oil smoke can be efficiently discharged by the blower 2.

When cleaning, the blower 2 is stopped, and the shutter 20 is swung downward by its own weight to close the air inlet 6 as shown in FIG. In this state, the cleaning liquid in the cleaning liquid tank 11 is pressure-fed to the nozzle body 41 by the cleaning liquid pump 30 and is jetted from each nozzle.

As a result, the nozzle body 41 rotates and the cleaning liquid is jetted toward the inner surfaces of the filter 9 and the hood 1, and the oil attached to the inner surfaces of the filter 9 and the hood 1 is removed by the cleaning liquid for cleaning.

The cleaning liquid sprayed on the filter 9 and the cleaning liquid sprayed on the inner surface of the hood 1
0 and flows down to the inner surface of the lower plate 3. The cleaning liquid that has flowed down to the shutter 20 flows to the inner surface of the lower plate 3, and the cleaning liquid that has flowed down to the inner surface of the lower plate 3 flows into the cleaning liquid tank 11 from the hole 10 without falling from the air inlet 6 at the rising portion 7.

The vertical swing center of the shutter 20 (shaft 2)
3) is opposite to the oblique air flow direction from the air inlet 6 to the suction port 8. Specifically, the air intake 6
The flow direction of the air flowing from the
And the center of the vertical swing of the shutter 20 is located near the outer peripheral edge of the hood 1.

As described above, the shutter 20 does not hinder the flow of the air sucked from the air intake 6 so much that the air flows smoothly, so that the suction resistance of the shutter 20 does not become very large. , Noise and shortage of exhaust air volume can be reduced.
No excessive force acts on the vertical swing center of 0 (shaft 23), and it is not necessary to increase the strength of the shutter 20 more than necessary, so that the shutter 20 can be made lightweight.

That is, assuming that the vertical swing center of the shutter 20 is the same as the air flow direction (toward the center of the hood 1),
The air sucked in from the air inlet 6 is the shutter 20
And the air flow toward the suction port 8 is greatly curved. For this reason, the suction resistance becomes extremely large, and noise is generated and the exhaust air volume is insufficient. In addition, since an excessive force is applied to the center of the vertical swing of the shutter 20, it is necessary to increase the thickness of the shutter 20 to increase the strength so that the shutter 20 does not come off or be damaged, thereby increasing the weight of the shutter 20. Since a large negative pressure is required to perform the opening operation, a blower having a large blowing capacity is required.

Next, another example of mounting the shutter 20 will be described. As shown in FIGS. 7A and 7B, a stopper 50 is provided on the shutter 20, and when the shutter 20 swings upward, the stopper 50 comes into contact with the rising piece 7 to regulate the fully open angle, for example, 90 degrees or more. It does not become.

As shown in FIGS. 8A and 8B, the bottom plate 3
A bracket 51 is provided in the vicinity of the air intake port 6, and the shutter 20 is attached to the bracket 51 so as to be swingable up and down around the shaft 23. The shutter 20 is brought into contact with a stopper 52 provided on the bracket 51 to regulate the fully open angle.
It does not exceed the degree.

By doing so, when the blower 2 is driven and the shutter 20 is fully opened, the center of gravity of the shutter 20 is closer to the closing side than the vertical swing center (the shaft 23).
When the blower 2 is stopped, the shutter 20 is securely closed by its own weight. Further, even when the shutter 20 is closed by a spring or the like, the spring can be weakened, so that the force required when opening the shutter can be small, so that the resistance applied to the shutter 20 is small and it is not necessary to increase the blowing capacity of the blower.

Next, another embodiment will be described. As shown in FIGS. 9 and 10, the inside of the hood 1 is formed into a box shape having a lower chamber 54 and an upper chamber 55 by a partition plate 53, the suction port 8 is formed in the partition plate 53, and the blower 2 is provided in the upper chamber 55. Install.

As shown in FIGS. 11 and 12, the bottom plate 3 of the hood 1 has a substantially upward U-shape, and air inlets 6 are formed in the front and rear sides and the left oblique portion 3c so that air flows obliquely. At the same time, the shutter 20 swings downward to be surely closed.

In each of the above embodiments, the cleaning liquid jetting section 40
The nozzle body 41 is rotated, but a nozzle body 56 having a plurality of nozzles facing upward and obliquely upward may be used as shown in FIG. Alternatively, tap water may be pressure-fed to the cleaning liquid ejection unit 40 by a hose or the like. That is, a means for feeding the cleaning liquid under pressure may be provided.

[0047]

According to the first aspect of the present invention, the cleaning liquid can be sprayed onto the inner surfaces of the filter 9 and the hood 1 to wash away oil and the like, so that the inner surfaces of the filter 9 and the hood 1 can be cleaned, and However, there is no need to manually clean the inner surfaces of the filter 9 and the hood 1.

The cleaning liquid sprayed on the inner surfaces of the filter 9 and the hood 1 is prevented from leaking from the air inlet 6 by the shutter 20, and the cleaning liquid does not flow down from the hood 1. There is no.

Since the shutter 20 is opened by the negative pressure in the hood 1 and closed by the positive pressure, no special mechanism for opening and closing the shutter 20 is required. This makes the structure simple and
There is no breakdown, the weight of the hood 1 is light,
Mounting becomes easy.

When the blower 2 is driven, the pressure inside the hood 1 becomes negative pressure, and when the blower 2 stops, the pressure becomes positive. Therefore, when the range hood 1 is used, the shutter 20 is reliably opened, and when the range hood 1 is not used, the shutter 20 is opened. Since the shutter 20 is securely closed, the shutter 20 automatically opens and closes when the range hood is used or not used, so that there is no malfunction and no operation for opening and closing the shutter 20 is required.

According to the second aspect of the present invention, the shutter 20 hardly obstructs the air flow from the air inlet 6 to the suction port 8, and the air flow is small and the air flows smoothly. As a result, no large noise is generated in the shutter 20 or the exhaust air volume becomes insufficient.
The shutter 20 does not have to have an unnecessarily high strength without excessive force acting on the vertical swing center of the shutter 20,
It is not necessary to make the shutter 20 light and to increase the blowing capacity of the blower more than necessary.

According to the third aspect of the present invention, when the blower 2 is stopped and the pressure in the hood 1 becomes positive, the shutter 20 is turned off.
Swings downward by its own weight to close the air intake 6. In addition, when the shutter 20 swings in the closing direction by the spring, the force of the spring can be reduced, and the force at the time of opening the shutter 20 is small, and it is necessary to increase the blowing capacity of the blower to open the shutter 20. Disappears.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a range hood showing a first embodiment of the present invention.

FIG. 2 is an overall perspective view.

FIG. 3 is an explanatory diagram of a state in which air and oily smoke enter a hood.

FIG. 4 is an explanatory diagram of a state in which an air intake of a hood is closed.

FIG. 5 is a perspective view of a nozzle body.

FIG. 6 is a diagram illustrating the rotation operation of the nozzle body.

FIG. 7 is an explanatory view showing another example of mounting a shutter.

FIG. 8 is an explanatory diagram showing another example of mounting a shutter.

FIG. 9 is a perspective view of a range hood according to a second embodiment of the present invention.

FIG. 10 is a longitudinal sectional view of FIG. 9;

FIG. 11 is a longitudinal sectional view of a hood part according to a third embodiment of the present invention.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

FIG. 13 is a longitudinal sectional view of a hood portion showing another example of the cleaning liquid ejection section.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hood, 2 ... Blower, 3 ... Lower plate, 4 ... Upper plate, 5
... peripheral plate, 6 ... air inlet, 7 ... rising part, 8 ... suction port, 9 ... filter, 10 ... hole, 11 ... washing liquid tank,
20 ... Shutter, 21 ... Horizontal plate, 22 ... Downward piece, 23 ...
Shaft, 30: Cleaning liquid pump, 40: Cleaning liquid ejection part, 41
... Nozzle body, 42 ... Filter nozzle, 43 ... Hood nozzle, 44 ... Rotating nozzle, 50 ... Stopper, 5
2. Stopper, 53: Partition plate, 54: Upper chamber, 55: Lower chamber, 56: Nozzle body.

Claims (3)

[Claims] 1. A hood 1 having an air inlet 6 and a suction port 8 and a filter 9 attached to the suction port 8, a blower 2 for sucking and discharging air from the suction port 8 of the hood 1, A cleaning liquid jetting unit 40 disposed in the hood 1 and jetting a cleaning liquid to the inner surface of the filter 9 and the hood 1;
Means for pressure-feeding the cleaning liquid to the cleaning liquid jetting part 40, and swinging upward by the negative pressure in the hood 1 to open the air inlet 6,
When the inside of the hood 1 is at a positive pressure, it swings downward and the air inlet 6
A range hood, comprising a shutter 20 that closes. 2. The vertical swing center of the shutter 20 is
The range hood according to claim 1, wherein the range hood is opposite to an air flow direction from the air intake port 6 to the suction port 8. 3. A stopper 5 provided on one of the hood 1 and the shutter 20 for restricting the fully open angle of the shutter 20 so that the center of gravity of the shutter when fully opened is closer to the closing side than the center of vertical swing.
The range hood according to claim 1 or 2, wherein 0 and 52 are provided.