HU229951B1 - Desk and process for air-conditioning an individual desk locally and personally - Google Patents

Abstract

The present invention relates to a workbench for creating a unique workplace having a foot structure, a worktop and support structure. It is characterized by the fact that at least two different spatial layouts are arranged on the support structure (13). axial (T1, T2) air nozzle (23) with independent control unit (3) (2) is. Another object of the present invention is to provide a multi-bladed work desk, a unique workplace, local, personal airflow, is characterized by the fact that the various spatially arranged flow axial (T1, T2) air rays are - average flow rate (WO) - and / or physical / chemical characteristics at the same time and / or individually or arbitrarily in combination in a personalized way.

Description

Dr. Vitéz Bátor lawyer I114 Budapest, Eadrusz utca 2, st <

and procedure individual workplace local, personal air conditioning / air conditioning

Bdelcruő; University of Debrecen (4032 Debrecen, 1. Egyetem tér) Inventors:

Dr. Ferenc Kalmar (4034 Debrecen, Félegyházi Tamás u. 34.) 55 to Klára Tünde Kalmar (4034 Debrecen, Felegyházi Tamás u. 34.) 30 to Dr. András Zöld (.1023 Budapest, 120 Véredre u.) 10 to Imre Csáky (4029 Debrecen, Dobozi u. 27 / B 3 ern. 32.) 5 to

Filed on: VI, 18, 2012

BACKGROUND OF THE INVENTION The present invention relates to a workbench having a foot structure, a worktop and preferably a shelf system.

It is characterized by having its own power supply with at least three different spatially arranged flow axial diffusers. and / or equipped with a centralized air supply system and a desk controlled air handling system.

The present invention also relates to a process according to the invention for a desk. individual workplace - for local, personalized air conditioning.

It is a sign that the auspicious person out there in the aerial constructions is looking for you:

number of simultaneous akm kgbeams activity time, volume? current,

- flow rate, options; pi, temperature, hottest stuff. etc., from the desktop controller unit to personalized manual and fully automatic control,

Magas The work desk, which functions as a high combi unrealistic boiler according to the invention, can be advantageously used in workplaces with a larger surface area and - '' or airspace to meet the work psychological and physiological needs of the human resource workforce.

The performance of the human workforce in indoor, indoor workplaces and is greatly influenced by the climatic conditions of the immediate workplace.

Primary workshop for ventilation systems in buildings, introducing fresh air to the occupants as a function of the activity performed, allowing an adult to breathe 500 air in the air during a relaxed breath! kg air and 16 breaths per minute 8000 rnl / min (8 l-min). produces respiratory rate. The body consumes 0.25 1 / min 02 provides 8 Ι / min respiratory rate with air volume. Exhaled carbon dioxide in air 210 ml The amount of acute intake of air per breath is called breathing air, the volume is calm, 500 ml in case of breathing, however, only the air that enters and passes into the alveoli in contact with capillaries can participate in gas exchange. tulajdon The volume of breathing Imltter in an adult is 150 ml. Thus, 5 <XM 50-350 ml of air is injected into the alveoli from the breathed air at rest.

oxygen (0?) During inhalation 20.95 vol% exhalation 16.4 ti'ú Difference -4.55 vol% nitrogen (N?) 79.01 tffe 79.6 vol% s-0.59% carbon dioxide (CO.d. 0.033 tffe 4.0 vol% 4-3.96%

Various shot / feed systems are used to provide fresh air. The wrong fan lest system kndlavzt.isnt the un Atchtmede ^ z kiUvtrnu íggu uyetvn scgztk el / iVíZgyítr Γ. J üe / t'Aég'-iá'oó / .fn ·· 'seerepe <? Zégnx'A'n '/ ko onurpitfw / ofp'í nn'eréséóeu á / nypto · tip &Íetgépá'zet i il year / oó · <;??> dOo 5 j _: , v ..... £ .... ..... £ 1.

'A, pc _; , / - / fe where ·>

</ (W / rfe) - Specific boom. heat load on the floor area of the room:

í? (1 / h) ..... légcsereszátn;

?. <> (&) - my absolute absolute temperature;

p (kg / rfe) ··· density of flowing air;

e _f; (J / kgK) - specific heat of flowing air at constant pressure.

.The system of the leading conductor produces a bytes, or ntoblus, of the residence zone. Duke. Types of ventilation systems;

♦ Time flooding

It has the following features: - the inlet air flows evenly at low speed through the room,

- avoiding air movements perpendicular to the main flow,

- isotherm or difference between small sticks húteiev ego, «1 digest

features

- the ego of the infiltrated and the room is bitter, · We strive for induction.

- fast, efficient mixing with you.

Types of firing / feeding media. »Radius LVR * Tangible LVR • Diffuse LVR * Microclimate. LVR.

♦ Low-pass LVR

In the case of conventional ventilation technology / eu'k tene / case, depending on the effect of the epulet, the standards stipulate the required air exchange rate. In recent years, energy saving requirements and requirements for heat sensation and indoor air quality have come to the fore o. Accordingly, the MSZ CR 1752: 2000 and. MSZ EN 15251: 2007 contains the required amount of fresh air and the microclimate pmamt spaces that are required to provide them with a closed load. However, flushing the entire volume of enclosed spaces is not an energy-saving solution, since the occupants are only a part of the space, used

Particularly poor space utilization is the large floor area and / or relatively large interior space. this allows for large-space workplaces when workers are at work desks at one place. that is, the r $ ag \ percent of the nets do their activity.

Individuals to improve the comfort of mixed workplaces, etc. personalized ventilation systems - a person! ventiUation has been developed.

developed such a system among others:

The International Center for Indoor Environment and Energy - Technological Lniversity of De n mark /fei/zvAnnr./c/ee.óyyydhz o /% 2 í &?% 2 díw rho d aspx,

The solution consists in having the most technical structure / single structure of the workbench connected to the khera / external central air source and supplying air from a beLRo fitting in the factory preset direction (see la., Ib ·, 1c).

the solution developed by Princeton Engineering Services /ü.űy.ri-'/úurtr.eA^zz/cA7g appropriate.enm''Brn7u7ng%2dSy:s7cms,fúí·?·?// which is; more up-to-date, more comfortable - in the case of air movement is made from more hay fittings. Inlet fittings on the worktable, 1 Instantly installed in the walkway. The diffuser grilles / outlet shutters are located in the plane of the worktop or walkway (see Figures 2a, 2b and 2c),

2c. The items are as follows: I floor panel 2 fans. 3 air intakes, 4 speed controllers, 5 hard disks. 6 acoustic covers. These item numbers refer only to this illustration and are not the same as those of the stakes described below

Significantly absent from the nugotdasc introduced in eAvoek? worked on a solution by Wei Sun, Kwok Wai Titan, Wei Zhou, Nan Gong and described it in ScienceDireot 42, 2007 (2007) 3974 -3983.

With this solution, the air jet is directed directly at the person's face - head (see; Figure 3)

Λ The advantage of personalized ventilation systems in addition to energy savings is that the efficiency of ventilation is higher than with conventional systems. Effectiveness of ventilation:

its relationship to C is the concentration of the pollutant. indices. £ in the exhaust air. X in the intake air. / inhaled air.

Ölesen According to & IT: £ Λ · / 5252: / «« faar eHvőwwmWí? / Tipuí paramefer.y / hófesfg »« / pb c / tergy / jer / hrsmonve of buifdíngs atáfawwíg indaor air yualUy, thermaÍ enrírvnnietif, // gÁ. gg nW ocotofTeehvicuÍ Uníversiiy of Dewnerk. 2t? / Ern «n '« m // Center / <>? - / rtí / f .í <? R .í arch / romí? F'f? / E'nergyy the efficiency of ventilation in different systems-

The table shows that the efficiency of ventilation in this type of personal ventilation is much higher than in conventional systems.

A common drawback of known personalized ventilation systems. not providing adequate comfort to the person who can be placed in the workplace may, in the event of favorable circumstances, have an adverse effect on the person in the workplace adjacent to the workplace, which may be particularly detrimental to the work of the thoughtful and attentive worker. ; oncontactor brain manager, etc ...).

Our goal is to 'solve' the system weaknesses and disadvantages of known solutions, to create a work desk </ by a workplace

- with local, personalized parameters (eg velocity, volume of the flowing air. sth.l ren.deNext provides a characteristic air supply to the person operating there.

person rt customized co. With the help of the vision, the occupational psychologist and the psychologist will meet the needs and needs of the person working there. thus providing her with total comfort.

Our invention is based on the recognition that the person performing the work improves the feeling of comfort. if the jet of air has not always and always not reached the same direction.

We have come to realize that by creating such a workbench a unique workstation and developing a personalized Triss air ventilation equipment. which allows the air to be blown in from multiple directions, and during operation these directions continue! airflow volume flow rate. velocity, optionally other characteristics (e.g., temperature, humidity, etc.) can be achieved at intervals according to the requirements of the user, then the objects of the invention will be fully realized.

As a result of the development, the direction, speed of flow, volume flow, temperature, humidity, etc. of the supply air can be changed. periodically as a result of individual or coordinated variability. in a confined environment of the desk .. in a unique workplace '* a complete box of virtual comfort is created which can test the bt / tosnu <1 / person's maximum concentrated activity free of disturbing / adverse physiological effects on the wine vessel / surface.

The present invention will now be described in more detail with reference to the drawings.

1a, a. a personalized - an inviting bowed - ventilation system as an example! Figure 11b is a schematic diagram of another exemplary embodiment of a customized, one-blown-vent system, described below. Fig. 4A is a third example of a personalized one-blow fitting ventilation system. sketch of its design,

Figure 2a is an example of a personalized - multiple diffuser-shaped ventilation system! design \ azlata.

2b, that personalized, multiple diffuser venting system is another example! develop a sketch? the

Fig. 2c is an example of the hefu \ o parts of a sanctuary-more infill-shaped cello-es system. the t. Layout sketch of Iter} / byte.

Figure 3 is a conceptual outline of a personalized, direct face / head diffuser solution,

still another aspect. abta invention eyewear desktop eb? Fig. 4b is a perspective view of a kt, d tkttasi vu / lutan; top view

Fig. 5 is a block diagram of the design of a desk according to the invention according to an inventor and a \ ag \ manager;

6 is a flowchart of the process of the invention.

7a, according to the invention. desk view of the concrete small judgmental pddakis,

7b. Fig. 7a is a representation of a labeled wine and / or wine,

7c. 7a. as shown! another view of the solution,

Fig. 8 is an example of an air supply and / or control unit of a desk according to the invention. design wax,

Figure 9 is a schematic diagram of a workstation / front-end and connection line for a plurality of common interior air-to-air workstations connected to s / crint desktops of the present invention,

Figure 10 is an example of an air supply and / or control unit 21 of the workbenches according to the invention. preferably recommended kt'Jaknuss wnJas wax,

4a and 4b. Figures 1 to 5 show a schematic diagram of a desk according to the invention in two views.

The present invention is a serim work desk made of worktop II with 12 foot structures. 1 table made of 13 supports; A junction and sagging assembly 21 consisting of 2 aerial structures formed by 221 interconnecting pipes and 222 esoid gaps at 22 stops and 222 inlets; a control unit 3 for controlling the air supply and / or control unit 21; furthermore. electrical power supply not shown? is made up of an actuator. Is the supply of fresh air to the air supply and / or control unit 21 localized ?? -L inputs or from central air supply ~ K inputs.

The air supply and / or control unit 21 will also be described in principle below.

An essential juncture of the ground plane design is the flow axes of the air jets leaving the inlets 23 - the opposite flow axis T1, the right flow axis T2. flow-left position of the left T3.

The spatial situations are determined by the occupied position / position of the SZ person working at table 1 relative to the table. Since it is impossible to keep the position of the SZ person permanently in a single position, it is advantageous to have 111 arc recesses in the working block .1.1. The arc recess 111 ensures that the spatial position of the SZ person working at the table

The spatial position of the flanks 23 is to be determined and adjusted so that each of the outgoing air rays is directed to the face or downward face of the SZ person.

I hun ancestor if the 23 letter o shapes are floor level ?! the same distance M, the opposite letter 2A from the side panels 112 and 1.13 the same distance A, the right and left letter 23 are arranged in a filter.

A further advantage is that the spatial position of the arrays 23 can be adjusted to the characteristics of the SZ person who is always present there.

The 2.3 fittings can also be placed under the 11 worktops. do you duplicate on multiple levels? too.

Increasing the number of levels can increase your comfort as long as. it does not go to the detriment of economists. Λ not milk height. however, in the case of multi-level placement, the font asokt is not normally required. SZ..person face.

It is arranged according to the invention. 23 Inlet fittings can be connected / connected to any air supply system theoretically and practically.

However, it is preferable that the air blowers 23 are supplied with air from an air supply and / or control unit 21 forming an integral part of the workbench.

It is also possible to have designs in which the intake manifolds 23 are individually air-independent (e.g., units with self-ventilated) or, as previously described, externally supplied centrally.

My unique fan design on vinegar s / solids 22 kAes atoms. The individual inlet units can be controlled separately from the control unit 3.

It is an essential feature of the invention that the tag beam can be actuated locally, at least in three directions simultaneously or sequentially, or in any dripping / combination, by manual or automatic control.

In case of necessity, the shutter fittings are arranged on the intake fittings 2.3.

Fig. 5a is a block diagram of an air supply and / or control unit 21 according to the present invention.

The air supply and / or control unit 21 has the same number of outlet nozzles 211 as the blow molds 23 of the work table 1 (not shown). One end of the outlet stubs 211 is connected to the distribution unit 212. The air supply of the distribution unit 212 is provided through a suction fan 213 with an inlet fan 213 for local air supply u, and for the central air supply via an inlet K at the inlet nozzle 216.

Due to the natural order of things, the air supply and / or treatment unit 21 may provide for the treatment of the koego spi. heating, cooling, all settings. etc s fuse Idtekné you \ o with 2 main air handling unit.

The air supply and / or control unit 21 further comprises a measuring and control unit 217 which can be controlled from the control unit 3. salami with inlet and outlet control valves 215 and an electric supply actuator (not shown).

As a preferred air handling unit for individual workstation design, the workbench according to the invention operates as follows:

The basic characteristics of the workplace climatization should be determined during the design-production phase.

Airlock symbol (s):

- the minimum outlet air speed, maximum airflow, and speed.

options (eg supply air temperature, humidity, etc.), spatial positioning of supply units:

- factory clogged.

heh color adapted to a hairy person ·

Advantageously, the control unit 3 is itself a known microprocessor computer which can be operated by software specially designed for this purpose.

The process of the invention, the operation and operation of the inventive desk, is described in a practical example.

4a, 4b, previously described. 5 and FIG. 6, which is described below, which is a process bar for the operation of an AHU system.

An essential feature of the process is that, due to the feature of the desktop I of the present invention, there is a constant velocity outflow of three different flow axes - opposite T1, right T2, and left T3.

The average velocity Wo of the exhaust air must be determined such that the average velocity Ws is also within the boundaries of the area occupied by the workbench 1, including the area provided to the person SZ! converging to ..CT.

Of course, the velocity of the SZ's personal rippling airwaves must also be taken into consideration.

Based on the above:

the flow velocity W1 of the air stream T1 flowing from the opposite intake 23 in the direction of the flow axis from the outlet position o to S1 distance: W'S.1 ^ 0, and to S2 distance: W $ 2 is determined by the applicable occupational health and safety regulations. and the MSZ CR 1752 standard.

- the flow velocity W3 of the air stream W3 flowing from the inflow unit 23 on the left side, at a distance o S3 from the exit point; WS3 ^ (k o S4 distance '). The maximum value of WS4 shall be determined in accordance with current work and health regulations and the prevailing standard (currently MSZ CR 1752}.

- the air jet velocity W2 flowing from the right-hand blower 23 but in the downstream direction is calculated in the same way as the left-hand one described above.

A further important procedural feature is the realization that in a warm environment the comfort feeling of the SZ person improves, if not always and not always from the same direction, the mostugao Finns reason is that the stimulus that the person tri changes continuously (where where the person is exposed to the beam), therefore, at the same stimulus intensity, the person does not control the given stimulus (airflow). Thus, we always feel as if the ventilation system has just started (similar to when we started to fan with a fan in sultry heat, but the invention always blinds the user to the beginning of the fan).

fnnvk is properly activated during operation, the blowers and thus the air rays are activated simultaneously locally and \ or one after the other, or in combination in any combination. According to test measurements, Reducing it to ^f c can save you a lot of energy because you have to move a lot of air with the help of a fan, cool it with the help of an air handling unit, heat it up, cMieni}.

Summary of procedure characteristics:

at least three jet planes of different spatial positions are used, where at least two are in opposite directions - see Fig. 4a. and Figures 4b -.

the flow of kgsug.n.jk activates the blow molds - simultaneously and or in sequence. one at a time or in arbitrary paros / combinations.

the air rays Wo outflow! its average speed is personalized, locally, optionally blowing rdomonkuu for a given maxsmáhs cttek mad / mtba.o'm terrified.

As an example! in this case, the desktop is provided with a local ivvggoel view. therefore, of course, it is provided with an independent air supply 21 and / or a starter unit, and has a male feeder 23, if the control unit 1 has a power screen.

By default, only the Wo outflow can be varied. Option for temperature and humidity! has become a passenger of today,

In local mode, the system can be started from the control unit 3 arranged on the muscular table 1.

After activating the control unit 3 and the air handling unit 2: activating the fan in manual mode;

adjust the parameters of the air jet (s) o Wo outflow velocity velocities o set options (eg supply air temperature, etc.) k-valve shut-off.

As stated above, the jets of air can be activated individually, or in any pair of combinations (by opening and closing the valves 2.15, each vent piece 23 can be opened or closed, for example, the opposite intake 23 is open, side} closed. .mtomata ü 'emmodban;

adjusting the parameters of the air jet air jets, and by actuating the valve control (sequence and operating cycle dampers), the automation is started.

Due to the order of things tefme'.zete ^, the term "valve" is understood to mean a technical solution which is capable of controlling or closing the flow of air flowing through the duct.

Air jet flowing from different diffuser shapes with proper control system design

The flow rate of Wo may be different.

.13

Steps in the process: suction of fresh air. filtration

The air supplied to the person can also be the air in the room if the carbon dioxide content is below the Pettenkofer number (1000 ppm). fresh or fresh {outside.} air can breathe (re-mixing the air will save energy). If fresh air is centrally guided in a single channel and connected to multiple work desks, sound and vibration distillation must also be ensured.

air treatment

By air treatment we mean setting the temperature and humidity of the supply air to food. With central air supply, air handling can be provided at longer intervals by installing a ke / pvnti air handling unit. then the centrally set value for each desk can be adjusted individually to help a smaller unit.

III. air transport

Air is transported through the air ducts. Noise and vibration damping must be provided. and the possibility of cleaning the sewer. The duct can be placed in suspended ceilings or suspended floors. Individual air desks can be connected to the duct, but this is not necessary. The task of the most part is to supply fresh air to the enclosed space.

ARC. air parameter parameters setting

1V / 1st Optimizing Local Temperature and Humidity IV./2. My local volume optimization

IV V I Causal Influence Optimized / Eye Beftnasi Directions for this entry bealht.tsa)

This step of the process ensures that the person sitting at the desk adjusts the optimum air temperature, air velocity, humidity, and frequency of change of supply direction to the individual's needs. You can, of course, do this action several times to ensure that the variable's sense of warmth is always appropriate,

V. Applying the Consequences of a Micro-Environmental Subjective Feeling

The ye of ye may change during your work \ exese. Vs eu> stimuli can be physical characteristics of tpk sunlight.As a transparent structure14 but they can also be psychological in nature (dealing with a client, a difficult task, etc.). The needs of the individual vary accordingly. Any change in the supply air can be individually adapted to the changed needs immediately. Optionally, the Fitting to the needs of the squad can be done centrally. if it is sensed by a hokumera to produce homogenous skin homelands, we regulate the supply air parameters accordingly.

Figures 7a, b and 7c are perspective views of a particular embodiment of a desk according to the invention in multiple views at different scales.

Also in the present embodiment, -as. according to the schematic embodiment - the table 1! With 11 working steps. 121 sideburns and the. a box structure 12 made of 122 stiffening legs connecting them. and a support structure 13 consisting of columns 1.31 formed on the worktop 11, further comprising two columns, lower and upper pole posts 132 formed between them,

Make a 111-hole recess in your worktop. so your work can be located at a comfortable distance, my car is perfectly centered; and occupies an opaque position relative to the entry points.

The air supply and / or control unit 21 of the air handling unit 2 of the workbench is a. 1 asth! Underneath its countertop 111 is a stiffening lab 122 attached.

The diffusers 23 are held in place by the diffuser grids 133. Preferably, the positioning is carried out with neodymium magnets adhering to the plate, preferably at the appropriate height of the vent grid 133 formed of a perforated plate, in accordance with the location of the juice piercing. They provide a vibration-free, stable grip, of course.

One of the affected chambers 222, elbows 22, which provide airflow between the inlet shapes 23 and the air supply and / or treatment unit 21, is passed through the worktop 11 and the lower blade 132. The tubing dome 222 is connected to each other by the conduit 22, which is connected to each other, the inlet 23, the coil 21 or the treatment unit 221.

In order to reduce costs, the present version is equipped with 11 work platforms and. of the three columns 131 between the lower shelf plates 132, as opposed to the use of bracket 221 for connecting tubes 221, On some brackets? non-functional connecting rain 221 is preferably flexible.

Underneath the 11 working ramps, did the 222 ESDs run through it? and tubing 211, which connects rain hoses 211 to fall 22, are not requested to be depicted in the figures.

FIG. 8 is a perspective view of a specific embodiment of the table or control unit of the desk according to the invention.

Also in the present embodiment, according to the principle embodiment, the air supply 21 and the hub control unit have three outlet ports 211, according to the embodiments shown in Figures? A .. 7b, 7e, which are connected to the air flow meter by means of motor valves 2.15. with 212 distribution units.

Supplying the 21 outlet egodlato and / or control unit with the fresh outlet at the workstation. 213 suction nozzle equipped with fume horns. local Lbemenet® ?? through, the engine 213 'sluice and the controlled fan 214? through the distribution unit 212 and from there to the position of the selected valve 215 ?? the. has been activated. 23 wrapped me up in shape to the SZ person.

Signs? the air handling unit 218 containing a Pcltier element in the forest is integrated into the distribution unit 212 in the local temperature optimization forest

9 shows the conceptual arrangement of several workstations connected to a central air-vision system arranged in common in-air, the kittlakuot from work desks of the invention. whereas Fig. 1 (Fig. 1) illustrates, by way of example, a preferred outline diagram of the air supply and / or starter unit '21 of the desks.

As shown in FIGS. 9, the inlet stubs 216 of the air-sighting and / or operating units 21 of side-by-side and back-to-back tables 1 are connected to the central air duct 4 by means of a connector 42.

The pressure in the animal duct of the 4 ducts - preferably to the outside space ?? a 4.1 fan fan with air filter and vibration damping.

Shoot

The air channel 4 preferably has a central air flow regulator, e.g. heating, hutex humidity, etc., - betilhto with air conditioner control unit A The flow rate of air from the air channel 4 to the air supply and / or control unit 21 is preferably controlled by the control element 43, e.g.

The air supply and / or treatment unit 21 according to the embodiment of Fig. 10 is in accordance with the embodiments of Figures 5 and 8. tn - this has the same number of outlet stubs 211 as the fitting 23 of the work table 1 not shown.

One end of the manifolds 211 is connected via a motorized valve 215 to a manifold 2.12 equipped with an air flow meter.

The air supply to the distribution unit 212 is via an air atom connector 42, not shown, through an inlet port 216 through a central inlet K and an air chamber 45. The inflow air flow rate is controlled by the control element 43.

From the distribution unit 212, the inlet air to the selected valve position 215 is supplied to the SZ person through the 23 inlets activated /.

Also in this embodiment, the distribution unit 212 incorporates a 2Γ8 air handling subunit containing a Pelder element for local temperature optimization.

Operation and operation of the air supply and / or control unit 21 according to the invention in connection with the central air supply system according to the invention and the air supply and / or treatment unit 21 having the design thereof is not intended to be repeated by those skilled in the art.

Workbench and procedure for local, personal climate control of an individual workplace

Claims (4)

1, Workbench The unique local climate for the workplace it belongs to! the workbench (I), which is connected to the reflector (23) and at least two different air flow directions ΓΠ, T2, T3) and to the letter designs (23) with an air control unit (23) having a separate control unit (3), and wherein the air rays of each of the internal heat sinks (23) are directed to a specific area around the work table (1), characterized in that the air engineering structure (2) comprises a valve actuated individually by the control unit (3) ($ 21) from each believer CM mamimé leg \ ug n, tk .Uumh-hessegen dere medtutvv rhythm, ve, this is my unique flash. Workbenches according to Claim 1, characterized in that at least two hoods (23) are opposed in the case of using more than two moldings (23). <T2). 13) a modular arrangement is provided for the airbag safety guard. Workbench according to claim 1 or 2, characterized in that the spatial position of the telescope (23) 4, 1-3. A nnmkaasiah according to any one of the claims, wherein the air rays discharged for the sake of interest (23) are directed towards the person (S2i) operating next to the rmmkaasla (1). $. Workbench according to any one of claims I to 4, characterized in that the air supply and / or air handling unit 12) of the ventilation unit 12) has an air supply and / or treatment unit of 1 z? It is. She. t ',' m \ χ \ x '\ s the air supply and / or treatment unit (21) of the air supply structure (2) of the avat, dkme V \, \ \ of the avat, dkme V *, regulating the physical teeth of the proprietary air, especially temperature and / or humidity ^e 'v ^x , tee' * fo '>, e, ebe: a \. bo mompomfi, b'mtfifi '^ -vés.au editu,' fi with foüeme <me, h _C g 'aeration structure. (2) an air supply and / or control unit (21) connected to a central air duct (4). SHE. a process for locally khmaating a workbench (1) having a plurality of muscles (23), wherein a single beam of different flow mines (T1, T2, T3) is led from each of the inlet pieces (I23). to a given space at the kphitmth of the workbench (1). ₅ . that during the process, the flow rate of each air jet is individually controlled by a predetermined schedule. A process according to claim 8, characterized in that the flow rate of the air cigars flowing out of the intake domes (23) is continuously changed. \ s -ve ο; \ 'm eha; n, with that jelleme / ^ e, isme »fio, nk'omkb. ' The flow velocity of the 2n mt vnfo air jets is intermittently varied. '', '? v Ό' xx. v>. -. '-> o? ü jdk'woe, v \, e xOs controls the flow rate of the mostagsrak flow during operation.