RU2526932C2 - Exhaust hood - Google Patents

Abstract

FIELD: heating, ventilation.

SUBSTANCE: invention relates to an exhaust hood designed for sucking air from the first part to the second. The exhaust hood designed for sucking air from the first part to the second part comprises a first exhaust means for drawing air into the exhaust hood by creation of at least a direct suction into the exhaust hood, the second exhaust means for drawing air into the exhaust hood by creation of at least a circular, cyclone or spiral movement, and the second exhaust means is made with the ability to operate in enhanced mode, at that the second exhaust means temporarily increases the suction performed by the first exhaust means and/or the first and second exhaust means are made with the ability to operate in pulsed working mode or alternatively. Also the method of sucking air by means of the exhaust hood is disclosed.

EFFECT: improved performance of suction, increased suction mode, fastness of smoke removal.

8 cl, 7 dwg

Description

The invention relates to an exhaust hood that draws air from a first portion into a second portion.

Known or standard exhaust hoods, which may also be called recycling hoods, stove hoods, kitchen hoods, stove hoods, suction hoods, overhead hoods, exhaust hoods, stove hoods or ventilation hoods, are used to remove grease, combustion products, smoke present in the air , odors and / or heat and steam, which usually occur during cooking on the stove, due to a combination of filtering and air release. They usually contain three main components: a trap for rising gases (also known as a “flow path”), one or more grease filters and a fan, or a surface impeller for forced ventilation.

There are two main uses for exhaust hoods: ventilation and recirculation. During ventilation, the output ring of the fan motor of the exhaust hood is attached to the duct system, which ends outside the kitchen. When recycling, a filter containing activated charcoal is used to remove odor and smoke particles from the air before returning the cleaned air to the kitchen.

Powered fans or blowers create a low-pressure section that spheres around the hood.

The air fat, combustion products, smoke, smells, heat and steam generated during cooking on the stove naturally rise in the vertical direction due to the influence of gravity, fall into the effective area of the hood and are captured by the low pressure area.

The standard hoods described above have at least a relatively low efficiency in treating vapors rising from the stove, since they equally suck in air from the environment. On figa shows such a cap 1 ', where the gas is sucked in from all sides along the paths shown by arrows 74'.

The pressure field 71 ′ of the standard hood 1 ′ above the top of the stove 7 ′ is shown in FIG. 1b. The pressure field indicates the suction volume of the hood.

WO 89/11926 A1 proposed a ventilation system with nozzles and / or impellers installed around one or more centrally located outlet channels.

The objective of the invention is to improve the characteristics of the cap, in particular the characteristics of the suction.

This problem is solved using an exhaust hood, characterized by the features of claim 1 of the claims. Preferred options are characterized, in particular, by the features of the dependent claims.

According to claim 1, the invention relates to an exhaust hood

a) which draws air from the first section to the second section,

b) and the specified cap contains

b1) a first exhaust means that draws air into the exhaust hood by creating at least substantially direct suction in the exhaust hood,

b2) and a second exhaust means that draws air into the exhaust hood by creating at least a substantially circular, cyclonic or spiral movement.

The second suction means preferably creates a vortex suction in the downstream section, which provides improved and concentrated suction. The combination of the first exhaust means and the second exhaust means according to the invention improves the absorption characteristics of the exhaust hood, since the addition of the second exhaust means, in particular, improves and / or focuses the absorption in the area under the second exhaust means, which is mainly used in cooking.

According to a preferred embodiment, the second exhaust means acts or can operate in an enhanced mode, so that the second exhaust means temporarily enhances the suction performed by the first exhaust means. This allows you to enhance absorption in the case, for example, the formation of large quantities of smoke. By activating enhanced mode, you can quickly remove smoke or reduce its amount.

Preferably, the first and second exhaust means operate or can operate in a pulsed operating mode or alternately. This ensures, on the one hand, that the smoke under the second exhaust means can be quickly removed or its quantity can be quickly reduced if this exhaust means is activated, while at the same time removing smoke from the surrounding area when the first exhaust means is activated.

According to a preferred embodiment, the first and second exhaust means act or can act together, so that the second exhaust means continuously enhances the suction performed by the first exhaust means. This provides improved suction in the area under the second exhaust means, while air is also drawn in from the surrounding area by the first exhaust means.

Advantageously, an external exhaust section surrounds the internal exhaust region, and preferably

a) the first exhaust means draws air into the exhaust hood mainly through the external exhaust section and / or

b) a second exhaust means draws air into the exhaust hood at least substantially uniformly through the external exhaust section and the internal exhaust section.

In this case, at least essentially separate exhaust sections are provided for both exhaust means, and the exhaust sections can complement each other without interfering or neutralizing one another too much.

According to a preferred embodiment, the air for the formation of a swirl is sucked in from the side, preferably through the side openings and / or from the external exhaust sections. This allows at least relatively easy to supply the required air, while at the same time without affecting the circular, cyclonic or spiral movement is more than necessary.

Preferably, the second exhaust means is added or can be added with the help of complementary means, preferably depending on the noise level, efficiency and / or amount of smoke, while the complementary means is preferably a switch and / or a device controlled by a sensor. In addition, a second exhaust means can only be added if necessary.

According to a preferred embodiment, the second exhaust means is a vortex exhaust hood and / or the first exhaust means is a standard exhaust hood.

Preferably, the exhaust hood is a ventilated and / or recirculating exhaust hood. According to a preferred embodiment with exhaust means, both embodiments can be used.

In addition, the invention relates to a method for creating air suction using an exhaust hood according to any one of the preceding paragraphs.

The invention is illustrated by drawings, which schematically shows the following:

figa, 1b - exhaust hood, known from the prior art;

figs - the general principle of the exhaust hood;

fig.1d - pressure field of the cap system of fig.1c;

figa-2C is an embodiment of the invention.

Fig. 1c shows the general principle of the vortex exhaust hood 1. Arrows 75 indicate a rotating column of air, and arrows 74 show a suction force. The combination of these two flows forms a vortex. Air is sucked in through the air inlets 101, 102 and moves into the exhaust duct 13.

A pressure field 71 of such a bell-shaped system 1 is shown in FIG. 1d. The pressure field indicates the effective suction volume of the hood. A swirl created between the top of the cooker 7 and the hood 1 draws in steam from the top of the cooker 7 as a result of a swirl movement.

2a-2c show an embodiment of the invention. Fig. 2a shows a perspective view of a cap with a vortex module 62. Fig. 2b shows a sectional view of a cap, while Fig. 2c shows a bottom view of a cap with a vortex module 62.

The exhaust hood 6 comprises a first exhaust means 64 that draws air into the exhaust hood by creating at least substantially direct suction into the exhaust hood 6, and a second exhaust hood 62 that draws air into the exhaust hood 6 by creating at least a substantially circular cyclone or spiral motion.

The exhaust hood 6 comprises a cubic upper part 681, under which there is a lower part 682 with at least approximately square upper and lower surfaces, between which four elongated side surfaces are located. On the sides of the lower portion 682, air inlets 601 and 602 are shown.

The upper part 681 and the lower part 682 are located directly next to each other, while there is no common surface, which ensures the passage of air.

FIG. 2b shows a series of exhaust ducts 623 of the vortex module 62 arranged tangentially around the annular portion 622. Unshown means purge the air tangentially from the air inlets 601 and 602 through the outer exhaust portion 634 to the inner exhaust portion 631 of the hood 6 and thereby create circulating air. The circulating air, in turn, creates suction, as a result of which air is sucked into and through the internal exhaust section 631. Air leaves the exhaust section through the outlet 633. This is also called vortex suction.

The exhaust means 64 is centrally located in the upper part 681 and can suck in air directly in the upper direction through the internal exhaust section 631 and the external exhaust section 634. This is also called standard suction.

Cap 6 can be used for both vortex suction and standard suction. This can be done in three different ways, described below.

According to the first mode, vortex suction complements the pulse operating mode, so that vortex suction and standard suction act alternately. For example, vortex suction is applied at the first moment, while standard suction is applied at the second moment. At the next moment, vortex absorption, etc., is applied again. This means that during vortex suction, the suction through the exhaust section 631 is enhanced, while during standard suction, the suction at least substantially extends through the inner exhaust section 631 and the outer exhaust section 634.

According to the second mode, vortex absorption can act in enhanced mode to increase the effect of standard absorption. This means that in normal operation, only standard suction is applied, while vortex suction is added to enhance, which enhances suction, mainly in the internal exhaust section 631.

According to the third mode, vortex suction is used together with standard suction, so that both modes act simultaneously. This means that the internal exhaust section 631 is enhanced, while the external exhaust section 634 operates with standard suction at least with respect to the internal exhaust section 631.

Claims (8)

1. An exhaust hood for suctioning air from a first portion to a second portion, comprising:
first exhaust means (64) for drawing air into the exhaust hood by creating at least substantially direct suction in the exhaust hood,
and a second exhaust means (62) for drawing air into the exhaust hood by creating at least a substantially circular, cyclonic or spiral movement, the second exhaust means (62) being configured to operate in an enhanced mode, the second exhaust means (62) temporarily enhances the suction performed by the first exhaust means (64), and / or the first (64) and second (62) exhaust means are configured to operate in a pulsed operating mode or alternately. 2. The exhaust hood according to claim 1, in which the first (64) and second (62) exhaust means are configured to function together, while the second exhaust means (62) continuously enhances the suction performed by the first exhaust means (64). 3. The exhaust hood according to claim 1 or 2, in which the outer exhaust section (634) surrounds the inner exhaust section (631) and preferably the first exhaust means (64) is configured to draw air into the exhaust hood mainly through the outer exhaust section (634 ), and / or the second exhaust means (62) is configured to draw air into the exhaust hood at least substantially uniformly through the outer exhaust section (634) and the inner exhaust section (631). 4. An exhaust hood according to claim 1 or 2, in which the second exhaust means (62), made in the form of a vortex module, is designed to suck in air, preferably through the side openings (601, 602) and / or from the outer exhaust section (634) . 5. An exhaust hood according to claim 1 or 2, wherein the second exhaust means (62) is configured to be switched on by an additional means, preferably depending on the noise level, efficiency and / or amount of smoke, and the additional means is preferably made in a switch and / or device controlled by a sensor. 6. The exhaust hood according to claim 1 or 2, in which the second exhaust means (62) is made in the form of a vortex exhaust hood and / or the first exhaust means (64) is made in the form of a standard exhaust hood. 7. The exhaust hood according to claim 1 or 2, made in the form of a ventilated exhaust hood, in which, preferably, the first section is located indoors, and the second section is located outside the room and / or in the form of a recirculation hood, in which, preferably, the first and the second sections are located indoors. 8. The method of suction of air using an exhaust hood according to any one of claims 1 to 7.

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