JPH0791697A - Exhauster - Google Patents

Abstract

PURPOSE: To prevent exhaust gas from dispersing by effectively performing supplementary discharging the exhaust gas from an exhaust system. CONSTITUTION: A plurality of nozzles under a blower chamber 18 of an exhaust system 10 forms a carrier jet 31 directed to a grease filter 13 in an exhaust chamber 12, thereby infallibly performing supplementary discharging exhaust gas from the vicinity 34 toward the exhaust chamber 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device used in, for example, a commercial kitchen.

[0002]

BACKGROUND OF THE INVENTION As is well known, in a commercial kitchen or the like, waste heat loads such as steam and oil smoke are emitted from cooking equipment.
Effectively managing ventilation, including this waste heat load, is extremely difficult.

In order to create good indoor ventilation conditions, it is necessary to prevent the exhaust gases emitted in the kitchen from spreading to the kitchen working zone, and thus ventilation is understood to be a system of process ventilation. It

From this point of view, it is necessary to exhaust the gas by a closed system that directly exhausts the cooking equipment, but ducts are installed in all the cooking equipment so as not to interfere with the cooking work. It is not possible, and it is difficult to capture all the exhaust gas of cooking equipment with this closed system.

On the other hand, although an exhaust hood is installed on the upper ceiling of the cooking appliance to prevent the diffusion of exhaust as much as possible, the exhaust performance is still unsatisfactory.

The exhaust performance depends on the shape, the area, the exhaust volume, the position of the intake opening, etc., but the front speed for exhaust,
That is, the exhaust trapping speed per area is 0.25 to 0.7 m /
s is recognized as preferable, but 0.25 m / s
In the following cases, only a small amount of gas is discharged, and as the convection increases in the kitchen, a higher exhaust gas trapping speed is required.

Therefore, when the exhaust gas increases in the kitchen, the required ventilation cannot be performed unless the air is generated in the kitchen, and therefore the above value cannot be actually realized. Therefore, in the case of this type of design, the exhaust capture rate is eventually reduced, and the expected exhaust cannot be achieved.

[0008] In these regards, the prior art is shown, for example, in Finland Patent No. 58971 and Swedish Patent Publication No. 790443-4.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem to be solved is to effectively capture and discharge cooking exhaust gas without diffusing it. To provide an exhaust system.

[0010]

According to the present invention, in accordance with the above-mentioned problems, the blowout jet is ejected from the blowout chamber toward the exhaust chamber forming the carrier jet between the blowout chamber and the exhaust chamber to exhaust the exhaust gas from the exhaust collection chamber. Is carried out by the carrier jet to the exhaust chamber to effectively capture and discharge the cooking exhaust gas without diffusing it so that the ventilation environment of the kitchen can be maintained in a good condition. , An exhaust chamber having a filter unit disposed in the housing, an exhaust collection chamber disposed in the housing, a blowout chamber also disposed in the housing, and an exhaust chamber forming a carrier jet The above-mentioned blowout jet And a means for directing a jet of the blowout opening toward the exhaust chamber, the exhaust apparatus being provided near the upper side of the blowout opening. An exhaust device (claim 2) characterized by being a guide baffle installed and a filter device (claim 3) characterized by using the filter unit as a grease filter unit. As means for solving the above problems.

The present invention includes the following embodiments. That is, the blowout opening is set so as to form the blowout jet directly forward, the blowout opening is set so as to form the blowout jet substantially upward, the blowout opening is set as the blowout jet and the carrier. A mode in which the jet is set to form a different plane, a mode in which the blowout opening is set to eject the blowout jet toward the lower surface of the carrier jet, and a mode in which the blowout opening is provided with a guide for squirting the blowout jet And the shape of the blowout opening is substantially elliptical, and the blowout jet of the blowout opening is directed toward the center from the boundary of the exhaust device to about 0.
At a distance of 5 m, the exhaust device 10 has an effect on both boundary areas, the filter unit has one or more suction openings, the filter unit has one or more grease filters. And the gap between adjacent blowout openings is set to be larger than the opening diameter, the gap is set to about 3 times the opening diameter, and the filter unit is provided with an exhaust flow passing through the grease filter. A mode in which a control damper that adjusts the air flow is provided, a mode in which the blowout opening is located below the exhaust collection chamber and is positioned lower than the filter unit,
The grease baffle is additionally arranged on the side of the guide baffle, and the guide baffle and the blowout opening are arranged so that a turbulent flow region is formed from the blowout opening into the exhaust collection chamber above and below the carrier jet toward the filter unit. The arrangement of the guide baffle and the blowout opening is such that the vacuum area formed in the exhaust collection chamber is as small as possible, and the arrangement of the control damper is slidable with respect to the grease filter. A mode in which the filter is provided adjacent to the filter, and a mode in which the guide baffle is inclined upward by a predetermined angle in the direction away from the blowout opening.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the preferred embodiments below. In FIGS. 1 to 4, reference numeral 10 is installed and used above a cooking appliance, for example, in a kitchen so as to be embedded in the ceiling. It is an exhaust device, and this exhaust device 10
Is composed of a housing 11, an exhaust chamber 12, an exhaust collection chamber 25 for collecting exhaust containing gaseous impurities such as steam and oil smoke, and a blowing chamber 18. As shown in FIG. 1, the exhaust chamber 12 includes one or a plurality of grease filter units 13, and a grease channel and a collection box 14 below the grease filter unit 13.

The filter of the grease filter unit 13 is provided with a control damper 15, and the control damper 15 quantitatively adjusts the exhaust flow passing through the filter.

The exhaust chamber 12 is provided with a connecting portion 16 and a control damper 17 that are connected to a duct system (not shown). The control damper 17 also quantitatively adjusts the exhaust flow flowing into and out of the duct system. The control damper 17 simultaneously functions as a fire damper. Reference numeral 23 is a differential pressure measurement point, and the blowout air flow to the blowout chamber 18 and the amount of this exhaust flow can be set according to the differential pressure Δp measured thereby.

The blowout chamber 18 is provided with a plurality of blowout openings 20 in its lower position.
0 is arranged so that a predetermined initial impulse can be given to eject the blowout jet. The blowout chamber 18 is provided with respect to an air intake duct (not shown).
It is arranged to be connected via a connector 19, which is provided with a control damper 24 which can be operated by actuating means 22 near the outlet opening 20.

As shown in FIGS. 1 to 4, the blowout opening 20 and the guide baffle 21 arranged on the blowout opening 20 affect the indoor air flow, and as a result, the initial impulse is achieved and the directional characteristic is achieved. Is installed so that it exits before entering the grease filter 13. The guide baffle 21 is advantageously arranged to act as a grease channel on the side adjacent to the blowing chamber 18.

Therefore, in the design of this example, as shown in FIGS. 5 to 7, the initial impulse becomes extremely high in the incoming air jet from the room in the vicinity area 34. . At this time, it should be noted that the worker is working below the neighboring region 34. Further, at this time, the main jet itself, that is, the carrier jet 31 is arranged so as to form a turbulent flow area 32, and as shown in FIG. 5, the turbulent flow area 32 of the carrier jet 31 creates a vacuum area 33 which is harmful to itself. Try to keep it as small as possible.

The inner surface 18a of the blowing chamber 18 collects the heat contained in the exhaust gas to be purified and the heat radiated by the heat source so that the collected heat can be transferred to the blowing air of the blowing chamber 18. A heat insulating surface is desirable.

The size of the nozzles of the blowout opening 20 of the present invention has an advantageous dimension that the distance between the nozzles is three times or more the diameter of the nozzles. As a result, the exhaust device 10
In, the predetermined effect is achieved as shown in FIG. As shown in FIG. 6, the nozzle 20 is arranged so as to blow air so that the harmful exhaust gas from the kitchen is drawn out in the vicinity of the nozzle.

In the preferred embodiment of FIGS. 8-10, the nozzle 20a in the boundary area of the exhaust system 10 is mounted so that the jet 31a is directed towards the central area of the exhaust system 10, while the nozzle in the central area is located. 20 has a blowing jet 31 directed substantially directly forward,
At this time, the blowout jet 31 constitutes the actual carrier jet 31. As shown in FIG. 10, the blowing jet 31a and the actual carrier jet 31 form different planes. The blowout jet 31a is preferably jetted toward the lower surface of the carrier jet 31 itself.

As shown in FIG. 9, the nozzle 20a has a beveled guide, but a further advantage is that FIG.
As shown in, the shape is elliptical. The blowout jet 31a is effective in both boundary areas of the exhaust system 10 at a distance of 50 cm from the boundary of the exhaust system 10 toward the center.

It should be obvious to those skilled in the art that various modifications and changes can be made without departing from the scope of the present invention.

[0023]

As described above, the present invention includes a housing,
Directed to the exhaust chamber having a filter unit disposed in the housing, the exhaust collection chamber disposed in the housing, the blowing chamber also disposed in the housing, and the exhaust chamber forming a carrier jet. A plurality of blowout openings arranged below the blowout chamber so as to blow out the blowout jet, and means for directing the blowout jet of the blowout opening toward the exhaust chamber are provided close to the upper side of the blowout opening. An exhaust chamber that forms a carrier jet from the blow-out chamber between the blow-out chamber and the exhaust chamber, since it is characterized in that it serves as a guide baffle and that the above filter unit is a grease filter unit. Exhaust capable of effectively capturing and discharging cooking exhaust gas without diffusing by exhausting the exhaust jet directed toward the exhaust chamber of the exhaust gas collection chamber to the exhaust chamber by the carrier jet and maintaining a good ventilation environment in the kitchen A device can be provided.

[Brief description of drawings]

FIG. 1 is a front view of an exhaust device.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of part A of FIG.

FIG. 4 is an enlarged view from direction B in FIG.

FIG. 5 is an enlarged view showing an exhaust state of the exhaust device.

FIG. 6 is an enlarged view from the direction C in FIG.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is an inner view showing another example of a blowout opening.

FIG. 9 is a plan view showing a relationship between a blowout opening and a blowout jet.

FIG. 10 is a front view showing a part of an exhaust device.

[Explanation of symbols]

 10 Exhaust Device 11 Housing 12 Exhaust Chamber 13 Grease Filter Unit 18 Blowout Chamber 20 Blowout Opening 21 Guide Baffle 25 Exhaust Collection Chamber 31 Carrier Jet 32 Turbulent Area

Claims (3)

[Claims] 1. A housing, an exhaust chamber having a filter unit disposed in the housing, an exhaust collection chamber disposed in the housing, a blowing chamber also disposed in the housing, and a carrier jet. An exhaust device comprising: a plurality of blowout openings arranged below the blowout chamber so as to blow a blowout jet toward the exhaust chamber to be formed. 2. The exhaust system according to claim 1, wherein the means for directing the blowout jet of the blowout opening to the exhaust chamber is a guide baffle arranged in the vicinity of the upper side of the blowout opening. 3. An exhaust system, wherein the filter unit according to claim 1 or 2 is a grease filter unit.