EP3135375A1 - Passenger and products protection in a safety cabin - Google Patents

Abstract

A safety cabin (1) for personal protection and product protection in a laboratory comprises a housing (2) with an interior space, an at least partially transparent front wall (211) and a working space (22) arranged in the interior and visible through the front wall (211). The front wall (211) of the housing (2) has an opening (215) through which the working space (22) is accessible. The safety cabin (1) further comprises an air supply connection (3) arranged on the housing (2), via which clean air can be led into the interior of the housing (2), and an air discharge connection (4) arranged on the housing (2), via the air the interior of the housing (2) is feasible. The housing (2) comprises a ventilation chamber (23), wherein the air supply port (3) to the ventilation chamber (23) is open and wherein the ventilation chamber (23) opens from above and from below into the opening (215) of the front wall (211) , The safety cabin (1) makes it possible to effectively protect both a product working in the working space (22) of the safety cage (1) from the product and products from contamination from outside the safety cabin.

Description

Technical area

The invention relates to a safety cabin according to the preamble of independent claim 1 and a method for operating a person-protected and product-protected working space in a laboratory.

Safety cabins with a housing, which comprises an interior space, an at least partially transparent front wall and a working space arranged in the interior, visible through the front wall, wherein the front wall of the housing has an opening through which the working space is accessible via an air supply connection arranged on the housing the clean air in the interior of the housing is feasible, and an arranged on the housing air discharge port through which air from the interior of the housing is feasible, can be used to protect people and products when working in a laboratory.

State of the art

When working on products in laboratories, it is often important to protect people from the product that is working on them. For example, in the pharmaceutical, biotechnological and chemical industries and research, substances or products are frequently processed by persons who are not allowed to come into contact with the persons for reasons of toxicity, for example. For this purpose, safety cabins are used in various designs.

Typically, such safety cabins comprise a housing having an interior space, a transparent front wall and a working space arranged in the interior and visible through the front wall. The product or the Substance is processed in the working space inside the housing, with the person working outside the safety cabin.

Safety cabins of the above type are known in closed and open design. Closed versions typically have protective gloves fastened to the front wall and protruding into the working space. For manual processing of the product lying in the interior of the executive person puts on the protective gloves and engages by means of which in the working space of the security cabin. The working space of the safety cabin can be configured so completely closed that the person is protected from the product. Although the protection of the person in such safety cabins is very good, they are still often unsuitable and undesirable, since the processing on the fixed gloves is relatively limited and cumbersome.

In open safety cabins of the above type, the front walls of the housing typically have an opening through which the working space is accessible from outside the safety cabin. To protect the person working open safety cabins are often equipped with a ventilation system, with the work space is a Unterduck generated. By way of example, such a ventilation system can have an air supply connection arranged on the housing, via which clean air can be guided into the interior of the housing, and an air discharge connection arranged on the housing, via which air can be guided from the interior of the housing. The generated negative pressure causes a constant flow of air through the opening into the working space. This prevents the substance or the product or parts thereof from escaping through the opening in the safety cabin. The person processing is thereby protected from the product.

In addition to the protection of persons from products, in the processing of, for example, pharmaceutical, biological or chemical substances, it is often also important to protect the substance or the product itself from contamination. For this purpose also safety cabins of the above type are used in closed or open design.

In the case of open safety cabins, it is known to provide a ventilation system for the protection of the products, with which an overpressure is generated in the working space. This overpressure causes a constant flow of air through the opening from the working space, which prevents the substance or the product from being contaminated by the opening from outside the safety cabin. The product is thereby protected during its processing.

A problem with the known above open safety cabs is that they only reliably protect either only the product or the person. Due to the underlying principles of the respective protection, ie negative pressure in the work area for personal protection or overpressure in the work area for product protection, the proven protection techniques can not be combined.

The present invention is therefore based on the object to propose an open safety cabin or a method for operating such, with which or both products processing people can be efficiently protected from the product and products from contamination from outside the security cabin.

Presentation of the invention

The object is achieved according to the invention by a safety cabin as defined by the features of independent claim 1 and by a method as defined by the features of independent claim 13. Advantageous embodiments of the invention will become apparent from the dependent claims.

The essence of the invention consists in the following: A safety cabin for personal protection and product protection in a laboratory comprises a housing with an interior space, an at least partially transparent front wall and a working space arranged in the interior and visible through the front wall. The front wall of the housing has an opening through which the working space is accessible. The safety cabin further comprises an air supply connection arranged on the housing, via which clean air can be guided into the interior of the housing, and an air discharge connection arranged on the housing, via which air can be guided from the interior of the housing. The housing has a ventilation chamber. The air supply port is open to the ventilation chamber and the ventilation chamber opens from above and from below into the opening of the front wall.

The term "clean air" in the context of the invention may refer to fresh air which has not or not yet been used for ventilation of the working space. Or it can refer to air that is cleaned before it is fed to the safety cabin. In particular, the clean air may be air having no contaminants which may affect the product or the person.

The working space of the safety cabin can have a work surface, which in particular can be aligned horizontally. The front wall can at least partially consist of glass or a transparent plastic. The opening in the front wall advantageously extends over the substantially entire width of the safety cabin. As a result, it can be achieved that the working space and, in particular, the work surface can be accessed almost completely through the opening.

The term "from above" in connection with the mouth of the ventilation chamber in the opening may refer to the fact that in a position of the safety cabin in accordance with the intended purpose, the ventilation chamber ends open in the opening. Clean air flowing through the ventilation chamber can be directed vertically or diagonally from top to bottom into the opening. In the intended position of the safety cabin, the working surface typically extends horizontally and the front wall extends vertically or obliquely from bottom to top. The term "from below" can be understood analogously to the term "from above", the direction being exactly opposite.

The air supply and exhaust ports may be spigots that are connected to a fan and / or to a suction device.

The inventive design of the safety cabin with a ventilation chamber, which opens into the opening from above as well as from below, allows clean air conveyed through the air supply connection to flow into the opening both from above and from below. Through a customized setting of the The air flow conveyed to the air discharge connection can be achieved in such a way that a portion of the clean air flowing into the opening flows away from the safety cabin or out of the safety cabin and a portion flows into the working space. The airflow directed through the opening from the safety cabin can prevent any possibly contaminated air from entering the working space from outside. In this way, the product can be efficiently protected in the workspace. At the same time, the airflow directed into the working space of the safety cabin can prevent, for example, air contaminated by the product from passing through the opening from the safety cabin. As a result, a person working in the working space can be efficiently protected.

The open safety cabin according to the invention therefore makes it possible to efficiently protect both a person working on the product in the working space of the safety cabin from the product and products from contamination outside the safety cabin.

The housing of the safety cabin preferably comprises a working space rear wall closing the work space and a venting chamber, the work space rear wall of the work space having at least one vent opening, the air discharge connection to the aeration chamber open, and the venting chamber connecting the vent opening of the work space rear wall to the air discharge port.

The at least one vent may, for example, be designed as a passage or as a series of slots in the workspace rear wall. It can be located in particular in the area of the working surface of the working space. Such a configuration with a at least one opening connected in the working space rear wall and connected to the air discharge connection via the venting chamber allows air to be conveyed from the opening of the front wall through the working space and out of the safety cabin via the venting chamber. The air can come from the opening into the opening ventilation chamber ago. In particular, in this way an air flow can be generated transversely through the working space and also essentially in the horizontal direction. Such a transverse or horizontal ventilation of the working space allows a particularly efficient protection of persons.

Preferably, the housing of the safety cabin comprises a ceiling wall, a rear wall and a bottom wall, wherein the ventilation chamber comprises an upper portion, the upper portion of the ventilation chamber comprises a ceiling sector extending along the ceiling wall of the housing and a front sector extending along the front wall of the housing to the opening of the front wall the ceiling sector of the upper portion of the ventilation chamber connects the air supply port to the front sector of the upper portion of the ventilation chamber, and the front sector of the upper portion of the ventilation chamber opens into the opening of the front wall of the housing.

The ceiling and bottom walls may in particular be aligned substantially horizontally. The rear wall can be oriented substantially vertically. The air supply port and / or the air discharge port may be located on the ceiling wall, allowing for a relatively simple connection of the safety cabin in a laboratory. For example, connection leads in laboratories are often stowed in ceilings, so that a connection from above can be particularly simple.

Preferably, the ventilation chamber further comprises a lower portion having a back sector extending along the rear wall of the housing and a bottom sector extending along the bottom wall of the housing to the opening of the front wall, the rear sector of the lower portion of the aeration chamber connecting the air supply port to the bottom sector of the lower Section connects the ventilation chamber and the bottom sector of the lower portion of the ventilation chamber opens into the opening of the front wall of the housing. Such a design of the ventilation chamber enables an efficient implementation of the inventive safety cabin.

Preferably, the housing of the safety cabin comprises at least one side wall, wherein the ventilation chamber comprises at least one lateral portion having at least one lateral portion of the ventilation chamber along the at least one side wall of the housing extending side sector, and the side sector of the at least one lateral portion of the ventilation chamber in the Opening the front wall of the housing opens.

Such a ventilation chamber allows clean air can also be guided laterally to the opening. Thus, in addition to the clean air led to the opening from above and from below, further clean air can be supplied to the opening, which can improve the efficiency of the air supply.

Preferably, a filter is arranged in the housing, which is connected upstream of the air discharge port. Such a filter allows the air discharged from the working space to be cleaned before it flows out of the safety cabin. In particular, so resulting in the working space impurities can be removed from the air.

The filter preferably covers the at least one vent opening of the working space rear wall. This allows efficient and complete filtering of the air discharged from the working space.

Preferably, the opening of the front wall is height adjustable. With such an opening can be grasped as needed at different heights in the work space. This allows people of different sizes to be comfortable in the workspace. This also allows the access level to be set depending on the activity in the workspace. Thus, the safety cabin is flexible.

Preferably, the ventilation chamber is provided with deflecting elements, by means of which incoming clean air can be distributed through the air supply connection, so that the clean air flows in a predefined ratio from above and from below into the opening. The predefined ratio can be set so that approximately identical air streams flow from above and from below into the opening. If all the clean air is supplied from above and from below the opening, the proportion from above and from below can be about 50% each. This enables efficient, purposeful operation of the safety cabin.

In this case, the deflection means are preferably arranged so that clean air flowing in through the air supply connection can be distributed over the entire width of the ventilation chamber. The term "width" in this context may be understood to mean, in particular, a direction lateral to a direction in which the opening into the working space is accessed. typically, the width extends transversely to a main flow direction of the conveyed through the ventilation chamber air. In this way, the clean air can flow uniformly over the entire width of the ventilation chamber, which allows a uniform supply of air into the opening.

When processing products in safety cabins, there is often a need to dump substances, such as the processed product, into containers. In order to maintain product and personal safety, this filling can take place in the safety cabin itself. The problem may arise that impurities or product residues remain in the safety cabin or on an outside of the container during the filling process.

In order to prevent this, the safety cabin preferably comprises a filling unit which has a container cover and a filling neck which is preferably arranged in the working space. The container cover can be centered on a container when the container is positioned through the ventilation chamber so that the filling nozzle protrudes into a container opening of the container and a passage open to the ventilation chamber is between the container cover and a container opening enclosing the edge of the container and between formed the filling nozzle and the edge of the container when the container is positioned through the ventilation chamber through and the container cover is centered on the container.

The filling nozzle may be substantially funnel-shaped or shaped as a funnel tube, which may facilitate a filling process. It is advantageously adapted to the container opening to allow the most accurate filling possible. The container attachment may, for example, be designed so that the container hangs on it through the ventilation chamber. For this purpose, for example, it can grip the edge of the container. Or the container attachment may be provided as a holder or support, which carries the container from below.

Often, containers used in the filling of products in laboratories have a body portion with a hollow interior and a neck portion forming the edge of the container opening. The container opening is usually round, so that the neck portion or the edge is correspondingly substantially hollow cylindrical or annular. In such embodiments of Container, the passage between the filler neck and the opening of the container may be provided as an annular gap.

The design of the safety cabin with a filler neck and a container cover as described above allows air to penetrate downwardly between the filler neck and the edge of the container opening and out through the container opening upwardly out of the container. As a result, an air flow can be generated out of the container opening, with which deposits in the filler neck can be blown away. In addition, deposits on the outside of the filler neck can also be blown away by the downward air flow generated between the edge of the container opening. At the same time, the outside of the edge of the container or of the container can be kept similarly clean.

In addition to the air supply connection, the safety cabin preferably comprises at least one further air supply connection arranged on the housing. Furthermore, the safety cabin preferably comprises, in addition to the air discharge connection, at least one further air discharge connection arranged on the housing. Such additional air intake and exhaust ports allow improved or more efficient ventilation of the safety cabin. This can be an advantage, especially with relatively wide safety cabs.

A further aspect of the invention relates to a method for operating a person-protected and product-protected work space in a laboratory. The method comprises the following steps: providing a safety cabin as described above; Connecting the air supply connection of the safety cabin to a clean air supply, for example a blower; Connecting the air discharge port of the safety cabin to an air discharge, for example, a suction device; Supplying a clean air volume flow into the air supply port of the safety cabin; and removing an air flow from the air discharge port of the safety cabin. The clean air volume flow supplied to the air supply connection is greater than the air volume flow discharged from the air discharge connection.

With the method according to the invention, it can be achieved that a proportion of the clean air volume flow through the working space is conveyed out of the air discharge connection and a remaining portion of the clean air volume flow is conveyed out of the opening away from the safety cabin or from the safety cabin. The airflow directed through the opening from the safety cabin can prevent any possibly contaminated air from entering the working space from the outside. In this way, the product can be efficiently protected in the workspace. At the same time, the airflow directed into the working space of the safety cabin can prevent the air contaminated by the product, for example, from passing out of the safety cabin through the opening. It can thus be ensured that, on the one hand, no contaminants can enter the safety cabin through the opening and, on the other hand, that no contaminants can escape from the working space through the opening. As a result, the person working in the working space and the product processed in the working space can be protected efficiently at the same time. The other effects and advantages of the safety cabin described above in connection with the safety cabin can also be achieved efficiently with the method.

In the method according to the invention, the air volume flow discharged from the air discharge connection is preferably in a range of about 60% to about 80% of the clean air volume flow supplied to the air supply connection and in particular is preferably about 70% of the clean air volume flow supplied to the air supply connection. The air volume flow exiting the opening may correspond to the rest of the clean air volume flow. This means that it can be in a range of about 20% to about 40% of the clean air volume flow and, in particular, about 30% of the clean air volume flow. Such an adjustment of the air flow rates can allow efficient convenient ventilation of the security cabin.

Brief description of the drawings

Fig. 1

eine perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemässen Sicherheitskabine;

Fig. 2

eine Frontansicht der Sicherheitskabine von Fig. 1;

Fig. 3

eine Seitenansicht der Sicherheitskabine von Fig. 1;

Fig. 4

eine Querschnittsansicht entlang der Linie B-B von Fig. 2;

Fig. 5

eine Querschnittsansicht entlang der Linie A-A von Fig. 2; und

Fig. 6

eine vergrösserte Ansicht des Details C von Fig. 5.

Further advantageous embodiments of the invention will become apparent from the following description of embodiments of the invention by means of the schematic drawing. In particular, in the following the inventive safety cabin and the inventive method with reference to the attached drawings described in more detail with reference to embodiments. Show it:

Fig. 1

a perspective view of an embodiment of an inventive safety cabin;

Fig. 2

a front view of the security cabin of Fig. 1 ;

Fig. 3

a side view of the security cabin of Fig. 1 ;

Fig. 4

a cross-sectional view along the line BB of Fig. 2 ;

Fig. 5

a cross-sectional view along the line AA of Fig. 2 ; and

Fig. 6

an enlarged view of detail C of Fig. 5 ,

Way (s) for carrying out the invention

Certain terms are used in the following description for convenience and are not meant to be limiting. The words "right," "left," "bottom," and "top" refer to directions in the drawing to which reference is made. The terms "in", "out", "below", "above", "left", "right" or the like will be used to describe the arrangement of designated parts to each other, the movement of designated parts to each other and the directions toward or away from geometric center of the invention and named parts thereof as shown in the figures used. These relative relative terms also include other positions and orientations than those shown in the figures. For example, when a part shown in the figures is turned over, elements or features described as "below" are then "above". The terminology includes the words expressly mentioned above, derivatives thereof, and words of similar meaning.

Fig. 1 shows an embodiment of an inventive safety cabin 1 for personal protection and product protection in a laboratory. The safety cabin 1 comprises a housing 2 and a frame 5 which supports the housing 2. The frame 5 has four legs 51, each having a height-adjustable foot 511. To adjust the height of the feet 511 in the legs 51 are screwed in and out. In this way, among other unevenness of the soil can be compensated, so that the safety cabin 1 can be safely aligned and placed.

The housing 2 is delimited by six outer walls 21 to the outside. The housing 2 is laterally of a vertical left side wall 216 and a vertical right side wall 217, upwardly from a horizontal ceiling wall 214, downwardly from a horizontal bottom wall 213 (in Fig. 1 not visible), rearward from a vertical rear wall 212 (in Figs Fig. 1 not visible) and bounded to the front by a front wall 211. The front wall 211 has a chamfered or quasi-diagonal upper portion and a vertical lower portion. In the lower region of the front wall 211, an opening 215 is provided, through which a working space 22 in the interior of the housing 2 is accessible. The opening 215 is rectangular in the front view. The upper area of the front wall 211 is transparent so that a person standing in front of the front wall 211 can look into the working space 22.

The working space 22 is bounded behind by a working space rear wall 221. In the working space rear wall 221 a plurality of ventilation openings 222 are provided, which are each formed as a horizontal slot. In the working space 22 a filling unit 25 is further arranged, in which a container 7 is mounted.

On the ceiling wall 214 two air supply ports 3 and two air discharge ports 4 are arranged in each case. Via the air supply connections 3, clean air can be conducted into the interior or an interior space of the housing 2 which surrounds the working space 22. Analogously, air can be guided out of the interior of the housing 2 or out of the interior via the air discharge connections 4. The air supply ports 3 and the air discharge ports 4 are offset from each other laterally and in depth to each other.

To avoid repetition in the figures and the associated description of the various aspects and embodiments, it is intended that certain features be considered to be common to various aspects and embodiments. The omission of an aspect in the description or a figure does not suggest that this aspect is lacking in the associated embodiment. Rather, such omission may serve the purpose of clarity and prevention of repetition. In this context, the following definition applies to the entire further description: If reference signs are included in a figure for the purpose of clarity of drawing, but are not mentioned in the directly associated descriptive text, their explanation will be given in the preceding Description of the Figures. If reference signs are also mentioned in the description text directly related to a figure, which are not included in the associated figure, reference is made to the preceding and following figures. Like reference numerals in two or more figures indicate similar or like elements.

In Fig. 2 the safety cabin 1 is shown from the front, here in contrast to Fig. 1 also the right side wall 217 and the bottom wall 213 of the outer walls 21 can be seen. The air discharge ports 4 are arranged inwardly offset relative to the air supply ports 3 on the top wall 214 of the housing 2.

The vent holes 222 in the working space rear wall 221 of the working space 22 are formed as a plurality of horizontal slots superimposed in two rows.

Fig. 3 shows the safety cabin 1 from the left side 216 ago. It can be seen that the air discharge ports 4 compared to the air supply ports 3 forward, that is in Fig. 3 to the right, offset from the top wall 214 of the housing 2 are arranged.

The upper transparent area of the front wall 211 is about 20 ° to the rear or in Fig. 3 tilted to the right. This results for the left side wall 216 and also the right side wall 217 (in Fig. 3 not visible) in each case the shape of a rectangular trapezium. The inclination of the transparent upper portion of the front wall 211 allows the working space 22 to be conveniently viewed from the front.

In Fig. 4 is the safety cabin 1 along the line BB of Fig. 2 and in Fig. 5 along the line AA of Fig. 2 shown cut. It can be seen that the housing 2 comprises a venting chamber 24 and a ventilation chamber 23 having a lower portion 231 and an upper portion 232. The lower portion 231 of the ventilation chamber 23 has a back sector 2311 and a bottom sector 2312. The back sector 2311 extends along the rear wall 212 of the housing 2 from the ceiling wall 214 to the bottom wall 213. It is open to the air supply ports 3 and the bottom sector 2312 so that a medium such as For example, clean air can circulate freely from the air supply ports 3 through the back sector 2311 into the bottom sector 2312. The bottom sector 2312 extends along the bottom wall 213 from the rear wall 212 to the front wall 211. It is open to the back sector 2311 and opens from below into the opening 215, so that the medium circulates freely from the back sector 2311 through the bottom sector 2312 into the opening 215 can.

The upper portion 232 of the ventilation chamber 23 has a ceiling sector 2321 and a front sector 2322. The ceiling sector 2321 extends along the top wall 214 of the housing 2 from the rear wall 212 to the front wall 211. It is open to the air supply ports 3 and the front sector 2322 so that the medium is free from the air supply ports 3 through the ceiling sector 2321 in the front sector 2322 can circulate. The front sector 2322 extends along the upper portion of the front wall 211. It is open to the ceiling sector 2321 and opens from above into the opening 215 so that the medium can circulate freely from the ceiling sector 2321 through the front sector 2322 into the opening 215.

The back sector 2311, the bottom sector 2312 and the roof sector 2321 of the ventilation chamber 23 may be formed by means of metal sheets. On the other hand, the front sector 2322 of the ventilation chamber 23 is made of a transparent material such as glass or a transparent plastic, so that the working space 22 is visible from the outside.

The working space 22 in the interior of the housing 2 has a horizontal working surface 223 which limits the working space 22 downwards. The work surface 223 extends from the work space rear wall 221 to the opening 215 of the front wall 211 and is conveniently accessible from outside through the opening 215.

Between the working space rear wall 221 and the rear sector 2311 of the lower portion 231 of the ventilation chamber 23, the ventilation chamber 24 extends vertically from bottom to top. It connects the ventilation openings 222 of the working space rear wall 221 with the air discharge connections 4. A filter 6 is mounted in the ventilation chamber 24 adjacent to the ventilation openings 222 in such a way that it covers the ventilation openings 222. A medium such as exhaust air can through the vents 222 and the filter 6 from the working space 22 in the Venting chamber 24 and from there freely circulate in the air discharge ports 4. The filter 6 is thus upstream of the air discharge ports 4 in a designated flow direction.

The ventilation chamber 23 is provided with deflection elements (not visible in the figures), by means of which the medium flowing in through the air supply connections 3 can be distributed. As a result, the medium is distributed in a predefined relationship in the lower portion 231 and the upper portion 232 and thus flows in the predefined ratio from above and from below into the opening 215. The predefined ratio can be 50% to 50%, for example. In addition, the deflection means are arranged so that the medium is distributed virtually over the entire width of the ventilation chamber 23.

In operation of the safety cabin 1, the air supply ports 3 are connected to a clean air supply and the air discharge ports 4 an air discharge. While a person is reaching through the opening 215 and processing a product in the working space 22, a clean air volume flow is introduced through the air supply ports 3 into the ventilation chamber 23 and an air flow is removed from the ventilation chamber 24 through the air discharge ports 4. The supplied clean air volume flow is greater than the discharged air volume flow. In particular, the air volume flow discharged from the air discharge connections 4 is in a range of approximately 70% of the clean air volume flow supplied to the air supply connections 3.

As a result, a proportion of the clean air volume flow is conveyed through the working space 22 and a remaining proportion of the clean air volume flow out of the opening 215 out of the safety cabin 1. In this way, it is ensured that the working space 22 is vented in a controlled manner through the venting chamber 24 and the exhaust air is filtered and at the same time an airflow exits the opening 215, which prevents contaminants from passing through the opening 215 into the working space 22.

Fig. 6 shows the detail C of the Fig. 5 in an enlarged view. In particular, the filling unit 25 is shown in more detail. The filling unit 25 has a container attachment (not shown in the figures), a container cover 251 arranged in the working space 22 of the housing 2, and a filling neck 252. The Container attachment is designed as a support that carries the container 7 from below. It can be adjusted in height, so that the container 7 can be inserted from below into the safety cabin 1. The container 7 is positioned by means of the container attachment so as to protrude through the bottom sector 2312 of the lower portion 231 of the ventilation chamber 23. He is sealed by means of a silicone seal 254 to the ventilation chamber 23 out. The container 7 comprises a body portion 71 and a substantially hollow-cylindrical or annular neck portion 72. The filling neck 252 is inserted vertically into a round container opening formed in the neck portion 72. In this case, an open passage is provided which comprises an annular gap between the neck portion 72 and the container cover 251 and an annular gap 253 between the filler neck 252 and the neck portion 72.

From the bottom sector 2312 of the lower portion 231 of the ventilation chamber 23, the open passage is accessible. During operation of the safety cabin 1, a small proportion of the clean air volume flow that crosses the bottom sector 2312 of the lower section 231 of the ventilation chamber 23 is guided via the open passage between the container 7 and the container cover 251 and through the annular gap 253 into the container opening. From there, the clean air then flows through the filler neck 252 in the working space 22. In this way, the filler neck 252 from the inside and from the outside and the neck portion 72 of the container 7 are blown from the outside and kept clean.

• Die Öffnung in der Frontwand kann höhenverstellbar sein.
• Zusätzlich zu den unteren und oberen Abschnitten kann die Belüftungskammer seitliche in die Öffnung mündende Abschnitte umfassen, über die Luft von den Seiten her in die Öffnung geführt werden kann.

While the invention has been illustrated and described in detail by the figures and the accompanying description, this description and detailed description are to be considered illustrative and exemplary and not limiting as to the invention. In order not to transpose the invention, in some instances, well-known structures and techniques may not be shown and described in detail. It is understood that those skilled in the art can make changes and modifications without departing from the scope of the following claims. In particular, the present invention covers other embodiments with any combinations of features that may differ from the feature combinations explicitly described. For example, the invention can also be realized in the following form:

• The opening in the front wall can be height adjustable.
• In addition to the lower and upper sections, the ventilation chamber may include lateral openings opening into the opening through which air can be directed from the sides into the opening.

The present disclosure also includes embodiments having any combination of features that are mentioned or shown above or below various embodiments. It also comprises individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below. Also, the alternatives of embodiments and individual alternatives described in the figures and the description may be excluded from the subject matter of the invention or from the disclosed subject matter. The disclosure includes embodiments which exclusively comprise the features described in the claims and in the exemplary embodiments as well as those which include additional other features.

Furthermore, the term "comprising" and derivatives thereof do not exclude other elements or steps. Likewise, the indefinite article "a" or "a" and derivatives thereof does not exclude a variety. The functions of several features listed in the claims may be fulfilled by a unit or a step. The terms "substantially", "approximately", "approximately" and the like in connection with a property or a value in particular also define precisely the property or exactly the value. The terms "about" and "approximately" in the context of a given numerical value or range may refer to a value or range that is within 20%, within 10%, within 5%, or within 2% of the given value or range. All reference signs in the claims are not to be understood as limiting the scope of the claims.

Claims (14)

Safety cabin (1) for personal protection and product protection in a laboratory, comprising: a housing (2) having an interior space, an at least partially transparent front wall (211) and a working space (22) arranged in the interior, visible through the front wall (211), the front wall (211) of the housing (2) having an opening (215 ), through which the working space (22) is accessible, one on the housing (2) arranged air supply port (3) through which clean air into the interior of the housing (2) can be guided, and an air discharge connection (4) arranged on the housing (2), via which air can be guided from the interior of the housing (2), characterized in that the housing (2) comprises a ventilation chamber (23), the air supply connection (3) being open towards the ventilation chamber (23) and the ventilation chamber (23) opening from above and below into the opening (215) of the front wall (211) , A safety cabin (1) according to claim 1, wherein the housing (2) comprises a working space rear wall (221) closing off the working space (22) against the front wall (211) and a ventilation chamber (24)
the working space rear wall (221) of the working space has at least one ventilation opening (222),
the air discharge port (4) is open to the ventilation chamber (23), and
the venting chamber (24) connects the vent opening (222) of the working space rear wall (221) with the air discharge connection (4). A safety cabin (1) as claimed in any one of the preceding claims, wherein the housing (2) comprises a top wall (214), a rear wall (212) and a bottom wall (213)
the ventilation chamber (23) comprises an upper section (232),
the upper section (232) of the ventilation chamber (23) has a ceiling sector (2321) extending along the top wall (214) of the housing (2) and one along the front wall (211) of the housing (2) to the opening (215) of the front wall (215). 211) extending front sector (2322), and
the ceiling sector (2321) of the upper section (232) of the aeration chamber (23) connects the air supply port (3) to the front sector (2322) of the upper section (232) of the aeration chamber (23) and the front sector (2322) of the upper section (232 ) of the ventilation chamber (23) opens into the opening (215) of the front wall (211) of the housing (2). A safety cabin (1) according to claim 3, wherein the ventilation chamber (23) comprises a lower portion (231), wherein
the lower section (231) of the aeration chamber (23) has a back sector (2311) running along the rear wall (212) of the housing (2) and a bottom wall (213) of the housing (2) up to the opening (215) of the front wall (215). 211) extending bottom sector (2312), and
the back sector (2311) of the lower portion (231) of the breather chamber (23) connects the air supply port (3) to the bottom sector (2312) of the lower portion (231) of the breather chamber (23) and the bottom sector (2312) of the lower portion (231 ) of the ventilation chamber (23) opens into the opening (215) of the front wall (211) of the housing (2). Safety cabin (1) according to one of the preceding claims, wherein the housing (2) comprises at least one side wall (216, 217), wherein
the ventilation chamber (23) comprises at least one lateral section,
the at least one lateral section of the ventilation chamber (23) has a side sector extending along the at least one side wall (216, 217) of the housing (2), and
the side sector of the at least one lateral section of the ventilation chamber (23) opens into the opening (215) of the front wall (211) of the housing (2). Safety cabin (1) according to one of the preceding claims, in which a filter (6) is arranged in the housing (2), which is connected upstream of the air discharge connection (4). Safety cabin (1) according to one of claims 2 to 5 and 6, wherein the filter (6) covers the at least one vent opening (222) of the working space rear wall (221). Safety cabin (1) according to one of the preceding claims, in which the opening (215) of the front wall (211) is height-adjustable. Safety cabin (1) according to one of the preceding claims, wherein the ventilation chamber (23) is equipped with deflecting elements, by means of which through the air supply port (3) inflowing clean air can be distributed, so that the clean air in a predefined ratio from above and from below into the opening (215) flows. Safety cabin (1) according to one of the preceding claims, comprising a filling unit (25) having a container cover (251) and a filling nozzle (252), wherein
the container cover (251) is centered on a container (7) can be arranged when the container (7) through the ventilation chamber (23) through is positioned so that the filler neck (252) projects into a container opening of the container, and
a passage open to the aeration chamber (23) is formed between the container cover (251) and an edge of the container (7) enclosing the container opening and between the filling nozzle (252) and the edge of the container (7) when the container (7) passes through the ventilation chamber (23) is positioned therethrough and the container cover (251) is centered on the container (7). Safety cabin (1) according to one of the preceding claims, which in addition to the air supply connection (3) comprises at least one further air supply connection (3) arranged on the housing (2). Safety cabin (1) according to one of the preceding claims, which in addition to the air discharge connection (4) comprises at least one further air discharge connection (4) arranged on the housing (2). Method for operating a person-protected and product-protected work space in a laboratory, comprising
Providing a safety cabin (1) according to one of the preceding claims;
Connecting the air supply connection (3) of the safety cabin (1) to a clean air supply;
Connecting the air discharge connection (4) of the safety cabin (1) to an air discharge;
Supplying a clean air volume flow into the air supply connection (3) of the safety cabin (1); and
Removing an air volume flow from the air discharge connection (4) of the safety cabin (1),
wherein the clean air volume flow supplied to the air supply connection (3) is greater than the air volume flow discharged from the air discharge connection (4). A method according to claim 13, wherein the air volume flow discharged from the air discharge port (4) is in a range of about 60% to about 80% of the clean air volume flow supplied to the air supply port (3) and in particular is about 70% of the clean air volume flow supplied to the air supply port (3) ,

Images