ES2394500A1 - Fume cupboard (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Exhaust fume hood, in which are determined a system for filtering the fumes by water curtains, a self-cleaning system inside the extractor hood by means of a cleaning product, a fire-fighting system by water spraying, a system of recirculation of air between the inside and the outside of the extractor hood and a system of recirculation of the water that is used in the extractor hood. (Machine-translation by Google Translate, not legally binding)

Description

FUME CUPBOARD

Technical sector

The present invention is related to the fume hoods that are used in food preparation kitchens, proposing such a hood with features that make it functionally advantageous to eliminate fumes under conditions of efficiency and safety.

State of the art

To eliminate the fumes that occur when cooking food, it is usual to have a hood for collecting and extracting the fumes, which can be expelled outside through an evacuation duct.

However, due to the high percentage of fats and gases that are generally contained in the fumes that are generated in cooking practices, these fumes are polluting of the environment, so filters are incorporated in the fume hoods to retain fats and Pollutant particles of smoke.

In that sense, the filters that are usually arranged in the extractor hoods, for the cleaning of the fumes, are dry filters formed by grids and blankets of fibers or sponge, in which the fat and dirt of the fumes accumulates, of such filters have to be washed or replaced frequently, and can be dangerous sources of fire generation.

To avoid the inconveniences of the mentioned dry filters, solutions have also been developed

from

bells extractors  from smoke with systems

from

filtered out

by Water, how the realization of the Model from

Utility

IS one 020 315 from the same headline that the

present invention, but the implementations of this type put into practice result from a large consumption of water and, in addition, have no security against the risk of fires resulting from the accumulation of grease and dirt that is deposited in the extractor hoods.

Object of the invention

According to the invention, a fume hood is proposed, developed with a water filtration system, but at the same time equipped with improvements that improve functional behavior and safety.

This extractor hood object of the invention consists of a housing that defines in the lower part a concavity for the collection of the fumes and in the longitudinal edges of said concavity some slots of passage of the fumes inwards, going in the upper part of The housing is an outlet for coupling to a flue gas pipe, with a structural assembly being provided in relation to that structural assembly comprising a smoke filtering system, a fire protection system, a self-cleaning system, a recirculation system of air, and a recirculation system of the water used.

The smoke filtering system consists of longitudinal tubes that are connected to an outlet

water supply, said tubes being provided at the bottom with a distribution of holes of

exit

of the Water, While that by below from sayings

pipes

the walls from the Case from the Bell

extractor

be they find provided with some highlights

longitudinal, from which the water to fall determines a series of waterfalls, which have to

be crossed by the fumes in the upstream from the lower inlet slots

to the upper evacuation exit.

The fire system also comprises longitudinal tubes provided with projection nozzles, these tubes being arranged in turn connected to a water supply outlet, with a water inlet passage in relation to an automatic temperature opening control.

The self-cleaning system is formed by the same water supply system for filtering, in combination with a container containing a cleaning product, with a programmable electronic control unit that determines the passage of the cleaning product to the water circuit during a washing program time, with manual operation

or automatic activation of said program.

The air recirculation system comprises grilles arranged in the contour of the upper part of the extractor hood and in relation to them some air extractors that drive the filtered air through said grids to the cabin from which the extractor hood takes air , so that through the extractor hood a recirculation of air renewal of the cabin is carried out, avoiding that in the

interior air currents are produced from outside to replace the air absorbed by the extractor hood.

The water recirculation system comprises a module that collects all the water that is used in the extractor hood and cleans it by filtering and decanting the grease, sending the clean water back to the extractor hood, by means of a motor pump, to be reused In this way, the functional operability of the extractor hood is developed with minimal water consumption.

Therefore, the extractor hood object of the invention results in characteristics that make it very advantageous for the function to which it is intended, acquiring its own life and preferential character with respect to conventional extractor hoods of the same application.

Description of the figures

Figure 1 shows a schematic perspective of

the

Bell extractor obj eto from  the invention, with a

cut

cross for to appreciate the elements from the

systems

integrated in she.

Detailed description of the invention

The object of the invention relates to an extractor hood, which are disposed above the food preparation kitchens, to eliminate the fumes that occur in the cooking processes.

The recommended extractor hood consists of a

structural casing (1), which in the lower part determines a concavity (2) for the collection of the fumes to be eliminated, with grooves (3) of passage of the fumes towards the longitudinal edges of said concavity (2) being defined the interior, while in the upper part an outlet (4) is defined for connection to a flue pipe.

The flue inlets (3) are defined between the edges of a lower wall (1.1) of the structural housing (1) and gutters (5) that determine the edges of an upper wall (1.2) of the housing itself structural (1).

In relation to this structural assembly of the extractor hood, a functional assembly is included, comprising a smoke filtering system, a fire protection system, a self-cleaning system for the extractor hood, an air recirculation system and a recirculation system of water.

The smoke filtering system consists of longitudinal tubes (6) provided with a distribution of holes in the bottom, which are arranged connected to a water supply outlet, said pipes (6) being arranged above some projections (7) that the walls (1.1 and 1.2) of the structural housing (1) have longitudinally inside.

In this way, the water falls from the tubes (6) on the projections (7), which determine a succession of waterfalls when the water falls between them, the water flowing on the lower wall (1.1) of the structural housing (1) ) to the gutters (5), in

where in turn determines a curtain of water. With this, the fumes that enter through the slots

(3),

for arrive to the exit (4) higher they have that

cross

the curtain from Water from the gutters (5), So

how

the succession from waterfalls formed between the

highlights

(7) from the walls (1.1 Y 1.2), Y also

they circulate in countercurrent of the water that goes down, with which a washing of the fumes takes place that determines a very effective cleaning of the same.

The fire system also comprises longitudinal tubes (8), which have projection nozzles (9), said tubes (8) being connected to a water supply, through a passage related to an automatic control Opening temperature.

In this way, when a fire occurs in the extractor hood, the temperature rise causes the opening of the water inlet to the tubes (8), leaving a nozzle (9) a projection of water that turns off the fire. Commissioning of the fire system,

it can also be done manually, for the activation of the system by the users, if the

automatic control, or under any circumstance deemed appropriate.

The self-cleaning system comprises a tank

(10) container of a cleaning product, said tank (10) being connected to the water circuit of the smoke filtering system, through a

valve (11) which is controlled by an electronic control unit (12), so that by means of the control unit

electronic (12) a washing program can be determined, in which said electronic control unit (12) activates the opening of the valve (11), so that the cleaning product contained in the tank (10) is then carried by the water from the smoke filtering system, producing, when the water is projected with the cleaning product through the pipes (6), a wash inside the extractor hood; the drive of the washing program can be activated

way

manual or automatically, for clean he

inside

from the Bell extractor, without to have that

perform

no disassembly from the same.

The air recirculation system comprises gratings (13) that are arranged in the contour of the upper part of the extractor hood, and in relation to said grates (13) there are extractors (not shown) that project through them. filtered and clean air from inside the extractor hood to the outside.

In this way, through the mentioned grilles

(13) there is an expulsion of air from inside the extractor hood to the cabin in which it is installed, thus determining a recirculation of air renewal of the cabin through the extractor hood, compensating the extraction of the air that it absorbs the hood to drag the fumes, which avoids the inflow of air from outside the cabin.

The water recirculation system comprises a module (14) that collects all the water that is used in the extractor hood, filtering said water and decanting the fat contained in the

same, for motor pump, reused.

5 From this the use consumption bell, evicted by

return clean water, by means of one to the extractor hood, where it is

mode, the activity of the operation of

extractor is developed with a minimum

water, resulting very economical

and greatly reduced the residual spill that

the drain pipes.

Claims (4)

1.-Fume extractor hood, consisting of a structural casing (1) composed of a lower wall (1.1) and an upper wall (1.2), determining at the bottom a concavity (2) for the collection of fumes, along whose edges are defined slots (3) of smoke inlet, while inside are arranged longitudinal tubes (6) of water circulation provided with lower holes of water fall, determining in combination with internal projections of the walls of the structural casing (1) a cascade of filtering of the fumes, characterized in that in combination with the filtering system of the fumes a self-cleaning system is determined inside the extractor hood, also including a system against water projection fires, an air recirculation system with respect to the cabin in which

be

find installed the Bell extractor Y a system

from

recirculation of the Water that be use in the

activities

of the functioning from the Bell

extractor

2.-Fume hood, according to the first claim, characterized in that the self-cleaning system comprises a container (10) container of a cleaning product, said tank (10) being connected to the water circuit of the filtering system of the fumes, through a valve (11) that is controlled by an electronic control unit (12) to establish a washing program. 3.-Fume hood, according to the first claim, characterized in that the system fire fighting consists of longitudinal tubes (8) provided with water projection nozzles (9), said tubes (8) being connected to a water supply outlet, in relation to a water control 5 water passage opening depending on the temperature. 4.-Fume extractor hood, according to the first claim, characterized in that the air recirculation system 10 comprises grilles (13) arranged in the contour of the upper part of the structural housing, through which establishes an expulsion of filtered air from inside the extractor hood to the passenger compartment in the 15 that is installed. fume extractor, according to the one characterized in that the water system comprises a module (14) that the water used in the hood said water by means of a hood for its