EP1798481A2 - Kitchen exhaust duct or hood - Google Patents

Abstract

The hood (1) has a housing (2) with an opening suitable for the removal of the used air from the cooking area and is fitted with a multitude of filter segments (8) positioned in a row and accommodated inside the housing (2). When a filter segment (8) has to be replaced it can be moved along a guide (9,10) and only be taken out at a particular gap (9b). The gap (9b) is closed with a locking element (17b) acting on a control switch (13) activating the ultraviolet light only when the suction hood (1) is used and interrupting the circuit when a segment (8) is exchanged.

Description

1. a) einem Gehäuse, das mindestens eine Öffnung aufweist, durch die Abluft in das Innere des Gehäuses einsaugbar ist;
2. b) einer Mehrzahl von Filtersegmenten, die in einer Reihe nebeneinander angeordnet sind und von der in das Innere des Gehäuses gesaugten Luft durchströmbar sind;
3. c) mindestens einer UV-Licht erzeugenden Lampe, die im Inneren des Gehäuses angeordnet ist.

The invention relates to a kitchen exhaust duct or hood with

1. a) a housing having at least one opening through which exhaust air can be sucked into the interior of the housing;
2. b) a plurality of filter segments, which are arranged in a row next to each other and can be flowed through by the sucked into the interior of the housing air;
3. c) at least one UV light-generating lamp, which is arranged in the interior of the housing.

Exhaust ducts or hoods of this type are parts of exhaust systems of large and catering kitchens. In order to prevent aerosol and aerosol residue from accumulating in the exhaust system, systems for aerosol and aerosol treatment are used. It uses special lamps that produce UV-C light and ozone. They are in the flow direction behind the filter segments, which are often aerosol, arranged and cause a photolytic oxidation of the organic substances contained in the irradiated area, eg. As the aerosolates and odors. This results in a reduction of the Aersosolatbelastung in the exhaust air system and the odor emission into the environment. Excess ozone is naturally converted back into oxygen.

The kitchen exhaust ducts or hoods are connected during assembly with an exhaust air system, which includes a fan, and at the same time connected to a differential pressure switch. The air purification system can only be put into operation in conjunction with the exhaust air system. This prevents ozone can escape into the operating rooms.

In known kitchen exhaust ducts or hoods of the type mentioned above, however, there is a risk that the UV lamp still burns when replacing individual filter segments, so that UV radiation can escape and damage people in the area.

Object of the present invention is to provide a kitchen exhaust duct or a kitchen exhaust hood of the type mentioned in such a way that the leakage of UV light is always reliably avoided.

• d) Führungseinrichtungen vorgesehen sind, entlang welcher die Filtersegmente verschiebbar sind und die so ausgestaltet sind, daß die Filtersegmente nur im Bereich einer Lücke entnehmbar sind;
• e) ein Verriegelungseinsatz vorgesehen ist, der in einer Reihe mit den Filtersegmenten herausnehmbar im Bereich der Lücke der Führungseinrichtungen derart plaziert ist, daß bei eingesetztem Verriegelungseinsatz kein Filtersegment aus den Führungseinrichtungen entnommen werden kann;
• f) ein elektrischer Schalter vorgesehen ist, der so betätigbar ist, daß bei herausgenommenen Verriegelungseinsatz der Stromkreis zu der UV-Lampe unterbrochen ist.

This object is achieved in that

• d) guide means are provided, along which the filter segments are displaceable and which are designed so that the filter segments can be removed only in the region of a gap;
• e) a locking insert is provided which is placed in a row with the filter segments removably in the region of the gap of the guide means such that when inserted locking insert no filter segment can be removed from the guide means;
• f) an electrical switch is provided which is operable so that when removed locking insert the circuit to the UV lamp is interrupted.

The invention is therefore based on the following principle: The individual filter segments are removed from the guide means along which they are displaceable, only at a single point, which could be referred to as a "lock" removable. At this point, however, normally sits a locking insert as a "placeholder" so that the filter segments can not reach the lock. The locking insert cooperates with an electrical switch. Only when it is used, the current flow to the UV lamp is released.

To remove filter segments, for example, for replacement or cleaning, the locking insert must first be removed, which is immediately connected to the shutdown of the UV lamp. Only then can the filter segments be moved into the area of the gap or "lock" and taken out of the housing one after the other.

Conveniently, the locking insert has an outer part and a slide guided in this, which can be guided against the force of a spring device in a position and locked in this, in which the electrical switch is actuated.

In this embodiment, it is not sufficient simply to insert the locking insert in the housing in order to come to a current flow to the UV lamp. Rather, in addition, the slider must be moved against the force of a spring and then held in this position, so that the UV lamp burns. If the lock of the slider is released, this is due to the force of Spring device pushed back so that already now the current flow to the UV lamp is interrupted. At this time, the entire kitchen exhaust duct or the entire exhaust hood is still closed light-tight.

To lock the slider in the outer part of the locking insert, a locking pin may be provided which is guided displaceably in the outer part and the inner end can be latched in a certain relative position between the outer part and slider in a recess of the slider. The locking of the slider relative to the outer part of the locking insert can thus be solved by simply pulling out the locking pin.

It is particularly preferred if the slider in its extended position engages under a portion of a holding element such that the locking insert can not be removed. In this embodiment, the slider thus fulfills a second function, namely that of holding the locking insert in the housing. Only when retracted slide the locking insert can be removed.

The slider should have a handle on which it can be moved relative to the outer part of the locking insert.

Figur 1

in isometrischer Darstellung einen Küchenabluftkanal von vorne;

Figur 2

in isometrischer Darstellung den Küchenabluftkanal der Figur 1 bei abgenommenem Deck- und Rückblech von hinten;

Figur 3

einen Schnitt durch den Küchenabluftkanal der Figuren 1 und 2 senkrecht zu dessen Längsrichtung;

Figur 4

eine Ausschnittvergrößerung aus Figur 3;

Figur 5

eine Ausschnittvergrößerung aus Figur 2;

Figuren 6 bis 8

in einer Ansicht ähnlich der Figur 1, verschiedene Phasen beim Ausbau der in dem Küchenabluftkanal enthaltenen Filterelemente.

An embodiment of the invention will be explained in more detail with reference to the drawing; show it

FIG. 1

in isometric view of a kitchen exhaust duct from the front;

FIG. 2

in isometric view the kitchen exhaust duct of Figure 1 with the cover and rear panel removed from behind;

FIG. 3

a section through the kitchen exhaust duct of Figures 1 and 2 perpendicular to the longitudinal direction thereof;

FIG. 4

a detail enlargement of Figure 3;

FIG. 5

a detail enlargement of Figure 2;

FIGS. 6 to 8

in a view similar to Figure 1, different phases in the expansion of the filter elements contained in the kitchen exhaust duct.

In Figures 1, 2 and 6 to 8, a kitchen exhaust duct is shown and provided overall with the reference numeral 1, which is designed as a so-called. "Edge channel". This means that the kitchen air duct 1 is arranged in a solid angle between a vertical room wall and the ceiling. For this purpose, it comprises a housing 2 which is formed by two end walls 3, a cover wall 4, a bottom wall 5, a rear wall not visible in the drawing and a profiled front wall 6.

The individual walls 3 to 6 are made of sheet metal parts; they are detachably joined together. However, at least the top wall 4 and the rear wall of the remaining housing 2 are removable.

The front wall 6 has at the top a first strip-like region 6a, which is vertically aligned and merges at its lower edge into a second strip-like region 6b, which points obliquely upwards. Below of the second strip-like region 6b is followed by a third strip-like region 6c, which is wider than the regions 6a and 6b and points obliquely downward.

Over almost the entire length of the third region 6c of the front wall extends a slot-like opening 7, in which in a manner shown below, a plurality of modularly joined filter segments 8 and further, explained below components are used. The filter segments 8 are preferably aerosol and have known construction; they are designed so that they can deposit the fat, which is carried by flowing air, on corresponding surfaces. Each filter segment 8 has a length which makes up only a fraction of the total longitudinal extent of the kitchen exhaust duct 1, so that therefore always a plurality of such filter segments 8 is inserted into the opening 7.

As can be seen in particular from FIGS. 2 and 4, a profiled rail 9 extends along the inner edge of the front wall 6 along the upper edge of the opening 7 and along the lower edge of the opening 7, likewise on the inside of the front wall 6, a further profiled rail 10 The profiled rails 9 and 10 are designed so that they can each receive the upper or lower edge of the filter segments 8 in such a way that the filter segments 8 in the longitudinal direction of the rails 9, 10 can be moved. The upper profile rail 9 comprises a downwardly bent edge region 9a, which, however, does not extend over the entire length of the rail 9 away, but to the right in Figure 2 right end leaves a gap 9b. The meaning of this gap 9b will be clearer below.

The lower rail 10 has an upwardly bent edge portion 10a, which extends over its entire length, so none of the gap 9b has comparable gap. Along the edge region 9a and 10a of the two profile rails 9, 10, the upper or lower edges of the filter segments 8 lie with their inwardly facing surface on the edge regions 9a, 10a and with their outwardly facing surface on a tread rib 11 and 12, which forms the upper or lower edge of the opening 7.

In this way, the filter segments 11 at all points except the region of the gap 9b in the upper rail 9 is not removable between the rails 9, 10 and the area 9c of the front wall 6 of the housing 2 held. In contrast, in the region of the gap 9b, which has a length which corresponds approximately to the length of a filter segment 8: Here, the upper edge of a filter segment 8 pushed back and there located filter segment 8 from the rails 9, 10 dug and then a total of removed at the front.

In the left in Figure 1 end portion of the slot-like opening 7 in the front wall 6 of the housing 2 made of sheet metal holding member 12 is fixedly mounted. The support member 12 carries, as shown in particular Figures 2 and 5, on its inside an electric limit switch 13, which has a pointing into the interior of the housing 2, provided with a caster 15 confirmation plunger 14. The left in Figure 5, vertically extending edge of the support member 12 is folded over twice, so that, immediately after the flat front of the support member 12, a first strip 12a and, after another Umbantung by 90 °, a second strip 12b form.

By means of a substantially rectangular recess 16 introduced centrally through the strip 12b and a part of the strip 12a, the strip 12b of the holding plate is subdivided into two tabs 12ba and 12bb. The plunger 14 or at least the caster 15 of the limit switch 13 protrudes through the opening 16 of the Haltebleelements 12 into the interior of the housing 2, so that he or she can be reached and operated from there.

Immediately adjacent to the holding element 12, a locking insert 17 is inserted into the opening 7, the total is best seen in Figure 6. The locking insert 17 comprises an outer part 17a made of sheet metal, the upper and lower edge is folded over twice by 90 °, so that thus form up and down groove-like guides.

In these groove-like guides, the upper and the lower edge of a slider 17b is guided. Also, the slider 17b is a sheet metal part; he is at all edges, including those who are perpendicular to the rails 9, 10, at least once folded by 90 °. On the slider 17b, a bow handle 18 is fixed, whose legs are passed through two horizontal slots 19 in the outer part 17a. With the help of the bow handle 18, therefore, the slider 17b relative to the outer part 17a can be moved to the extent that allows the size of the slots 19.

In addition to the bow handle 18, an axially displaceable locking pin 20 is passed through the outer part 17 which can engage in a certain relative position between slide 17b and outer part 17a in a bore 21 of the slider 17b. The locking pin 20 is spring loaded so, that he tries to move inwards, ie in the direction of the slide 17b.

Between the perpendicular to the front side 6 of the housing 3 portion 12a of the holding element 12 and the adjacent, parallel thereto extending fold 17ba of the locking insert 17 a plurality of leaf springs 22 are provided, which push the slider 17b away from the retaining element 12.

In the assembled state, which is shown in FIG. 1, the different filter segments 8 adjoin the locking insert 17 on the side opposite the holding element 12. At the opposite end of the holding member 12 of the opening 7, a compensating plate 23 is inserted, which optionally via adjusting screws, which allow a tolerance compensation, with an edge on one side surface 3 of the housing and the other edge on the adjacent filter segment 8 is supported. The compensating plate 23 is adjusted so that it and the various filter segments 8, the locking insert 17 and the Halteellement 12 in the assembled state remain in frictional engagement with each other, so that no translucent gaps arise between the individual parts.

In the state shown in Figure 1, the slide 17b is extended by appropriate actuation of the handle 18 against the force of the leaf springs 22 so that its corresponding edge engages with the fold 17ba under the two tabs 12ba, 12bb of the support member 12 and the plunger 4 of Limit switch 13 is actuated via the caster 15, so that the circuit is closed to the UV lamp. The slider 17b is held in this spring-loaded position by the locking pin 20 in the opening 21 of the slider 17b is engaged.

During operation of the kitchen exhaust duct 1, exhaust air from the kitchen is sucked through the filter segments 8 through a blower, not shown, and fed to the outside atmosphere via suitable piping systems. In the filter segments 8, the largest part of the entrained aerosol and Aerosolatrückstände remains hanging. In addition, in the housing 2 UV-C light generating special lamps are arranged, which are not shown in the drawing. These special lamps cause a photolytic oxidation of the organic substances contained in the exhaust area, in particular Aerosolat- and odors. In addition to UV-C light, ozone is also produced; both must not escape into the operating rooms.

• Zunächst wird der Arretierstift 20 des Verriegelungseinsatzes 17 nach außen gezogen, so daß der Schieber 17b frei beweglich wird. Er wird nunmehr von den Blattfedern 22 nach innen, in das Außenteil 17a des Verriegelungseinsatzes 17 gedrückt. Die Abkantung 17ba des Schiebers 17 entfernt sich von dem Stößel 14 des Endschalters 13. Dies hat auf direktem oder indirekten Wege eine Unterbrechung des die UV-C-Lampen speisenden Betriebsstromes zur Folge.
• Nunmehr wird mit Hilfe des Handgriffes 18 der Schieber 17b weiter zurückgezogen, bis die Abkantung 17ba die Laschen 12ba und 12bb des Halteelements 12 nicht mehr untergreift. Nunmehr kann der Verriegelungseinsatz 17 unter einer Verkippung nach vorne herausgenommen werden, wie dies in Figur 6 schematisch dargestellt ist. Nachdem auf diese Weise Platz geschaffen wurde, kann das benachbarte Filtersegment 8 in Richtung auf das Halteelement 12 geschoben werden, wie dies in Figur 7 dargestellt ist. Dieses Filtersegment 8 gelangt somit in den Bereich der Lücke 9b der oberen Profilschiene 9 und kann, wie schon oben erläutert, zunächst verkippt und dann ebenfalls nach vorne herausgenommen werden. Dies ist in Figur 8 dargestellt. Auf diese Weise lassen sich der Reihe nach alle Filtersegmente 8 aus dem Gehäuses 2 des Küchenabluftkanales 1 entnehmen.
• Die Montage der gereinigten oder neuen Filtersegmente 8 geschieht entsprechend in umgekehrter Weise. Zuletzt wird der Verriegelungseinsatz 17 bei zurückgezogenem Schieber 17b entgegen dem in Figur 6 dargestellten Pfeil wieder an seinen Platz zwischen den Profilschienen 9 und 10 eingefügt. Sodann wird mit Hilfe des Handgriffes 18 der Schieber 17b gegen die Kraft der Blattfedern 22b ausgefahren, bis schließlich der Arretierstift 20, durch die Kraft der ihn beaufschlagenden Feder, in die Bohrung 21 des Schiebers 17b einfällt. In dieser Position untergreift der Schieberrand wieder die Laschen 12 ba, 12bb des Halteelements 12 und betätigt mit seiner Abkantung 17ba den Stößel 14 des Endschalters 13, so daß der Stromkreis wieder geschlossen wird und die UV-C-Lampen wieder bestromt werden.

If one or more of the filter segments 8 have to be removed, the procedure is as follows:

• First, the locking pin 20 of the locking insert 17 is pulled outward, so that the slider 17b is free to move. He is now pressed by the leaf springs 22 inwardly into the outer part 17 a of the locking insert 17. The fold 17ba of the slider 17 moves away from the plunger 14 of the limit switch 13. This has a direct or indirect way interruption of the operating current supplied to the UV-C lamps result.
• Now, with the aid of the handle 18, the slide 17b is further retracted until the fold 17ba no longer engages under the tabs 12ba and 12bb of the holding element 12. Now, the locking insert 17 be taken forward under a tilt, as shown schematically in Figure 6. After space has been created in this way, the adjacent filter segment 8 can be pushed in the direction of the holding member 12, as shown in Figure 7. This filter segment 8 thus passes into the region of the gap 9b of the upper rail 9 and can, as already explained above, first tilted and then also taken out to the front. This is shown in FIG. In this way, in turn, all filter segments 8 can be removed from the housing 2 of the kitchen exhaust duct 1.
• The installation of the cleaned or new filter segments 8 is done accordingly in the reverse manner. Lastly, when the slide 17b is withdrawn, the locking insert 17 is again inserted into its position between the profile rails 9 and 10, counter to the arrow shown in FIG. Then, with the aid of the handle 18, the slide 17b is extended against the force of the leaf springs 22b, until finally the locking pin 20, by the force of the spring acting on it, enters the bore 21 of the slide 17b. In this position, the slide edge engages under the tabs 12 ba, 12 bb of the support member 12 and actuates with its fold 17 ba the plunger 14 of the limit switch 13, so that the circuit is closed again and the UV-C lamps are energized again.

Claims (5)

Kitchen exhaust duct or hood with a) a housing having at least one opening, is sucked through the kitchen exhaust air into the interior of the housing; b) a plurality of filter segments, which are arranged in a row next to each other and can be flowed through by the sucked into the interior of the housing kitchen exhaust air; c) at least one UV-light generating lamp, which is arranged in the interior of the housing;
characterized in that d) guide means (9, 10) are provided, along which the filter segments (8) are displaceable and which are designed so that the filter segments (8) can be removed only in the region of a gap (9b); e) a locking insert (17) is provided, which is placed in a row with the filter segments (8) removably in the region of the gap (9b) of the guide means (9, 10), such that when inserted locking insert (17) no filter segment ( 8) can be removed from the guide means (9, 10); f) an electrical switch (13) is provided which is operable so that when removed locking insert (17) of the circuit is interrupted to the UV lamp. A kitchen exhaust duct or hood according to claim 1, characterized in that the locking insert (17) comprises an outer part (17a) and a slide (17b) guided therein, which is guided and locked against the force of a spring device (22) can be in which the electrical switch (13) is actuated. Kitchen exhaust duct or hood according to claim 2, characterized in that in the outer part (17a) a locking pin (20) is displaceably guided, the inner end in a certain relative position between outer part (17a) and slide (17b) in a recess (21) of the slide (17b) can be latched. Kitchen exhaust duct or hood according to claim 2 or 3, characterized in that the slide (17b) in its extended position engages under a region (12ba, 12bb) of a holding element (12) such that the locking insert (17) can not be removed. Kitchen exhaust duct or hood according to one of claims 2 to 4, characterized in that the slide (17b) has a handle (18) on which it can be displaced relative to the outer part (17a) of the locking insert (17).

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