JPH07208786A - Suction device and ventilator for kitchen - Google Patents

Abstract

PURPOSE:To generate a rotary convergent air flow directed toward a suction port in a space near the port by synergistic operation of a rotary force generated by air flow and a suction force of a suction device by supplying the air from a plurality of air supply ports provided at an external position via the suction port communicating with a blower obliquely oppositely to the suction direction of the suction port. CONSTITUTION:A suction port 6 is provided at a lower surface of a body 4, and four air supply ports 8A, 8B, 8C, 8D are provided outside the port 6. A plurality of vent passages opened toward obliquely downward of the body 4 at a rib-shaped protrusion are provided at the ports 8, and air injecting velocities are regulated by altering lengths and inner diameters of the passages. Thus, a combined force of velocity components of a circumferential direction from the four ports 8 becomes a couple of forces rotating at the port 6 as a center, and spirally converging centering rotary force is applied to the air of a lower space of the body 4 by synergistic operation with the centering velocity component directed toward the port 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake device, a kitchen ventilation device and an air purifying device.

[0002]

2. Description of the Related Art As a conventional technique according to the present invention, for example,
As disclosed in Japanese Patent Laid-Open No. 64-84039, "Smoke exhaust treatment hood," there is a proposal to suspend four blower tubes below the hood body and blow air from the blower tubes to form an air curtain. However, when this conventional technology is actually used for treating smoke in a kitchen, the air duct hangs in front of the eyes, so if it interferes with the cooking work or the air duct becomes dirty with oil smoke, it will not work smoothly. There is a risk that the expansion and contraction function will be impaired, oil stains on the air duct will adhere to clothes, and it will be necessary to clean it frequently to avoid ignition of oil stains on adjacent air ducts from the stove. , There are some room for consideration in practical use.

[0003]

SUMMARY OF THE INVENTION In view of the above problems of the prior art, the present invention can be applied to kitchen ventilation and air cleaning, and can perform a quick intake action, which is practical and highly reliable. It aims to provide an intake device.

[0004]

A typical feature of an air intake device according to the present invention is that a main body has a built-in blower, and a plurality of blower ports are provided at appropriate positions outside the intake port leading to the blower. The air is blown from these air outlets in a direction diagonally opposite to the air intake direction of the air inlets, and the rotational force generated by these air blows and the suction force of the air intake device cause a synergistic effect toward the air inlets toward the space near the air inlets It is to generate a rotating convergent air flow.

[0005]

By implementing the present invention, air around the main body such as smoke exhaust during cooking is swiftly collected in the intake device as a rotating convergent air flow. Further, unlike the prior art, since a blower tube to be hung on the main body is not required, cooking work is facilitated and there is no fear of stains on clothes or fire.

[0006]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an air intake device 2 in which the present invention is applied to a kitchen ventilation device. Air intake ports 6 are provided on the lower surface of a box-shaped main body 4, and air blow ports 8A, 8A are provided at four locations outside the air intake port 6.
8B, 8C and 8D are provided.

A control unit 12 such as an operation switch is provided on the front surface of the main body 4, and the intake port 6 is covered with a grease filter 10. Further, in the main body 4, an electric blower 7 that sucks air from the intake port 6 and another electric blower (not shown) that blows air from the blower port 8 are incorporated.

In the blower port 8 shown in FIG. 2, a plurality of air passages 1 are formed in rib-shaped projections and open obliquely downwardly of the main body 4.
4A, 14B, 14C and 14D are provided. By changing the length and the inner diameter of the air passage 14, it is possible to adjust each air ejection speed.

In the illustrated example, the ventilation resistance is gradually reduced by gradually reducing the length of the ventilation passage 14 as it goes away from the lower surface of the main body 4, and the ejection velocity from the lower ventilation passage 14A is close to that of the main body 4. It is designed to be higher than the ejection speed from the ventilation passage 14D in the above. In addition, the opening direction of these ventilation paths 14 is changed such that the opening angle θ with respect to the horizontal plane is set so that the lower ventilation path 14A is lower than the upper ventilation path 14D. Therefore, the outflow air from the blower opening 8 gradually diffuses as it moves away from the blower opening 8.

FIG. 3 is a view of the main body 4 seen from below, in which the direction of air blowing from an arbitrary air blowing port 8A is angled more than a virtual center line 16 connecting this air blowing port 8A and another air blowing port 8B adjacent thereto. It is opened so that only φ can face inward.

Therefore, the outflow velocity V from the air outlet 8A is
It has a centripetal velocity component Vr toward the intake port 6 and a velocity component Vc in the circumferential direction with respect to the center of the intake port 6.

Therefore, the resultant force of the velocity components Vc in the circumferential direction of the air blown from the four air outlets 8 becomes a couple that rotates around the intake port 6 and the velocity component Vr.
Due to the synergistic effect with the centripetal force due to, a centripetal rotational force that converges in a spiral shape is applied to the air in the space below the main body 4.

FIG. 4 is a conceptual diagram of the air curtain 18 formed by the air blowing from these four air outlets 8. The airflow diffuses in a fan shape from each air outlet 8A, 8B, 8C, 8D, as if it were a triangle. A frame-shaped air curtain 18 that is formed by connecting the walls of the above is generated in the space below the main body 4.
Since the air curtain 18 has the centripetal velocity component Vr toward the intake port 6 as described above, it has an effect of sucking the surrounding air into the air curtain 18.

The air in the air curtain 18 is
It is sucked upward by an air blower 7 from an intake port 6 that opens at the top. Here, by making the intake amount of the blower 7 built into the main body 4 considerably larger than the total amount of the blown air from the blower port 8, the downward velocity component of the air ejected from the blower port 8 is changed to the upward direction by the blower 7. It does not affect the intake performance.

Therefore, due to the synergistic effect of the rotational force and the centripetal force due to the air blown from the air outlet 8, the surrounding air is sucked into the air curtain 18 while rotating, and in the air curtain 18, the air curtain 18 itself causes the air to rotate. By the synergistic effect of the rotational force and the suction force of the blower 7,
The upward rotating airflow converges upward, and is efficiently sucked into the intake port 6 of the main body 2 without being diffused.

FIG. 5 shows an example in which the above-mentioned intake device 2 is applied to the exhaust equipment of a kitchen, and the hanging cabinet 2 above the cooking table 20.
The exhaust pipe 24 that penetrates the wall 22 to the main body 4 installed at 0
Are connected. When the air intake device 2 is operated during cooking,
An air curtain 18 having a centripetal rotation action as shown in FIG.
Due to the upward suction action by the, a convergent rotary airflow 25 rising toward the intake port 6 is generated in the air curtain 18.

Therefore, the smoke exhausted during cooking is quickly sucked into the main body 4 without being diffused, and is exhausted to the outside from the exhaust pipe 24, so that efficient ventilation can be performed. In addition, unlike the above-mentioned conventional technique, since there is no air blow tube suspended from the main body 2, cooking work can be performed easily, and the clothes are soiled due to accidental contact of the user 26 with the air blow tube or adhere to the air blow tube. There is no fear of catching oil stains.

Further, the present invention is not limited to the above-mentioned embodiment, but the number of the ventilation ports 8 may be three, for example.
When used for ventilation of the living room or for air cleaning, a part of the exhaust air of the blower 7 is supplied to the blower opening 8 to serve also as another blower dedicated to blower, or each of the plurality of blower openings 8 has a small size. The blowers 28 may be individually arranged.

Further, an air purifying filter or the like may be arranged on the suction side or the discharge side of the blower 7 built in the main body 4 to be applied as an air purifier. Further, in the above-mentioned embodiment, the opening 14 of the blower port 8 is circular, but it may be a long hole or a slit.

[0021]

As described above with reference to the embodiment, by carrying out the present invention, it is possible to provide a practical and highly reliable intake device capable of performing a quick intake action.

[Brief description of drawings]

FIG. 1 is a schematic view of an intake device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the blower port of FIG.

FIG. 3 is a bottom view of the main body of FIG. 1 and a state of blowing air.

FIG. 4 is a conceptual diagram of air curtain generation.

FIG. 5 is a use state diagram showing an application example of the present invention to a kitchen ventilation device.

[Explanation of symbols]

4 ... Main body, 6 ... Intake port, 7 ... Blower, 8 ... Blower port, 18
… Air curtain, 25… Rotating convergent air flow.

Claims (9)

[Claims] 1. A plurality of air outlets are provided outside an air inlet of a blower built into a main body, and air is blown from these air outlets in a direction diagonally opposite to an air intake direction of the air inlet, and is generated by these air blows. An intake device characterized by generating a rotationally convergent airflow toward the intake port in a space near the intake port by a synergistic effect of the rotational force and the suction force of the intake device. 2. The air intake device according to claim 1, wherein the air blown from the air blower diffuses gradually from the air blower. 3. The air intake device according to claim 1, wherein the air blown from the air blower port has a velocity component in the same rotational direction about the air inlet port. 4. The method according to claim 1, 2 or 3, wherein the direction of air blown from an arbitrary air blower port is set to be inward of a virtual center line connecting this air blower port to another air blower port adjacent thereto. Characteristic intake device. 5. The air intake device according to claim 1, wherein the blower port is formed by a plurality of openings, and air is blown from the openings at different outflow speeds. 6. The air intake unit according to claim 1, wherein an air intake port is provided on a lower surface of a main body having a blower, and a plurality of air flow ports are provided outside the air intake port, and obliquely downward from the air flow port. The intake device is characterized in that a rotating upward airflow directed toward an intake port is generated in a space below the main body by a synergistic effect of the rotational force generated by the air blow and the suction force of the blower. 7. A ventilation device according to claim 1, wherein the suction air from the intake port is discharged to the outside of the room. 8. A main body according to claim 1, wherein the main body is arranged above a combustion appliance in a kitchen with a space therebetween.
A kitchen ventilator characterized by generating a rotating upward airflow toward an intake port in a lower space near the main body and discharging the sucked air to the outside of the room. 9. An air purifying device, characterized in that suction air from the intake port according to any one of claims 1 to 8 is exhausted into a room through a filtering device.