TR201807854T4 - A method for controlling the amount of air supplied to or discharged from a safety cabinet. - Google Patents

Abstract

The present invention relates to a method for controlling the amount of air supplied to and / or discharged from a safety cabinet.

Description

DESCRIPTION AIR FEEDED OR DISCHARGED FROM A SAFETY CABINET The present invention includes air fed and/or discharged from a safety cabinet. relates to a method for controlling the amount of discharge air and/or or a supply air line is connected to a cabinet body of the safety cabinet and also inside the discharge air system and/or the supply air system. The signals of at least one sensor installed are used to measure the air volume. is being evaluated, and a control inside which is connected with the sensor. discharge air installation and a time-dependent air quantity control with the help of the occurs in the supply air installation.

Safety cabinets and especially hazardous materials cabinets are normally liquid or solid service for the placement and storage of hazardous materials, for example chemicals they do. For this purpose, these types of safety cabinets typically have a certain fire resistance. They are equipped with the capability of and regularly perform a self-shutdown they have mechanism. self-closing mechanism, elevated at a temperature that closes the cabinet body in an inlet opening in case of fire, for example. It ensures that the cabinet door is closed securely. A safety cabinet of this type, equipped with an air handling unit, is described. Moreover cabinet body has a supply line and a It has a sensor and with the help of it, the air transported in the supply system amount is detected and monitored. transported according to the feed of a substance presentation device the amount of air is changed within the scope of a regulation. and/or monitoring of potentially explosive containers and enclosures and fire relates to a mechanism for early diagnosis. Meanwhile, individual smoke detectors modules They are combined in the form of a ring and connected to each other via a ring bus. This In this way, the detection time of the smoke sensor in general will be reduced and the targeted early detection of fire will be possible. discharged air in a casing rear wall, among others. It relates to a cabinet equipped with openings, and in particular to a safety cabinet. A The discharge air unit belongs to a discharge air opening. A discharge with the help of a sensor aerial monitoring can be applied. At this time, the sensor determines the volume flow of the discharge air. appropriately continuously or within specified predetermined time intervals can detect whether it is present.

According to the document numbered EP 1 609 541 A2, in the state of the art, a casing a security job equipped with a work area surrounded by bank is present. There is also a discharge air fan and a circulating air fan for conveying a stream of air into the security workbench. is foreseen. With the help of an additionally realized regulation device, a discharge current nominal value and a circulating air current nominal value are stored. Moreover regulating device, discharge air ventilator's transmission power, a discharge air The discharge air volume of the discharge air volume flowing from the filter per time unit is nominal. It is configured to be set to be essentially equal to its value.

The state of the art is mainly based on the bus of smoke sensors on the one hand. connections and, on the other hand, the amount of air fed to a safety cabinet. It has been attempted and has been found positive. In any case, here are primarily circumstantial events, i.e. In the known state of the art forming the species, only one substance presentation occurs. used when available. In this way, it is necessary for an air assembly to supply a energy gradually decreases. Of course it costs more as before. operating conditions, especially those associated with this type of ventilation device. There is a high need for Here the invention will be helpful.

The present invention provides a safety system so that substantial energy savings can be seen. for controlling the amount of air supplied to or discharged from the cabinet addresses such a method and the technical problem of developing a device.

To solve this technical problem, feed into or from a safety cabinet The present invention of a species-appropriate method for controlling the amount of discharged air feature within its framework; time-dependent amount of air with the help of a control device control of a hazard-specific and status-specific air volume in addition to the is to occur.

Within the framework of the present invention i.e. discharge air installation and/or supply air at least one sensor present in the installation It is used to control or adjust the amount of air, and even with a sensor. It is used in connection with a connected control. Control unit at this time It gives the desired amount of air in advance, inside the sensor and in this way pre-given air in connection with the regulation circuit created amount is regulated. This is the discharge in the supply air system. It can occur as an air system or in both installations. Inventive here As a result, the control of the air volume is time-dependent, that is, time-dependent. an air volume control occurs.

Indeed, in this context, time-dependent air quantity control is a change the ventilation assembly or the power of the ventilation assembly particularly advantageous. As a result of this, the related supply installation and/ or the amount of air delivered via the discharge system also changes. Related ventilation The power of the device depends, for example, on the hours of the day or and/or the week depending on the day and/or date and/or depending on the season and/ or it can be changed depending on the year. This generally means that the sensor's signals are additionally with the aid of the control unit and a regulation occurs under.

In any case, the control unit is typically equipped with a time element, With the help of this, time-dependent air control is applied and in The power of the ventilation device applies the desired time-dependent variation. For example, the power of the ventilation device during its operating time in a laboratory. It may be considered to set the normal power to a normal value. Despite this, take a break power to run the vent after or on weekends is reduced or reduced to a reduced power. Similar variations depend on the season, the week days, dates etc. is also possible and conceivable.

Always with the help of invention, control unit and sensor, air control or It ensures that the air quantity control is applied depending on the time, There is an appropriate change in the power of the ventilation mechanism that belongs to the inside. This The present invention in the figure is a maximum supply air supply to said safety cabinet. feeding or discharging discharge air, often only per day. Helper when needed for a certain number of hours and not needed other than that It is possible. Also, time dependent air control or air quantity control It also takes into account the difference between days and weekend days, so that the end result The average (electrical) power for the control of the ventilation device is significantly falls. As a result, significant energy savings are observed in part.

Within the framework of the present invention, with the control unit half an additional hazardous material-specific air volume control is applied. So the control unit is in this case supply air volume control, which has been described previously. system and/or discharge air system, instead the amount of air control takes place as a supplementary specific to the dangerous substance. Here according to the present invention, dangerous goods stored in the safety cabinet According to this, it is meant to change the air quantity control.

In this context, the present invention first provides a detection of dangerous substances and typical It is therefore recommended that this be detected by quantity, vapor pressure and hazard potential. it does. These parameters can be set, for example, manually via a control unit or in the same In this way, it can be transferred to the control unit automatically with the help of a reading unit.

In the latter case, the reading unit can display, for example, a sign, a barcode, a QR code or similar in or on the drum or containing the relevant dangerous substance can read in a container.

Depending on the previously given parameters, the control unit is then required. determines an optimal value for the amount of air supplied or discharged, and this In this way, it gives the air quantity control specific to the dangerous substance. Finally the control unit can power the ventilation system in case of time-dependent air quantity. changes. This is practical in the case of hazardous substance-specific air volume control. can be reduced to 0 or almost 0, and even instantaneously the relevant safety It also applies this for the case where no hazardous materials are stored in the cabinet.

Status-specific air volume control with the aid of the control unit as a supplement also occurs. The air quantity control specific to this status is instantaneous takes into account the situation and shows it. Cabinet status or location present invention within the frame of the cabinet features, a typical change of air volume control or condition requiring a variation of the amount of air supplied or discharged specifies.

These include, for example, status notifications such as "door open" or "door closed", i.e. opening or closing of the cabinet door, which is normally attached to the cabinet body status notifications indicating its location. previously stated status notifications can be detected via at least one door opening sensor and the control can be reported to the unit. Here it is normal depending on the signals of the door opening sensor. As a result, the automatically supplied or discharged air of an opened cabinet door will correspond to an increase in the amount of can be applied in such a way that it almost represents the normal position.

A similar status notification of the safety cabinet, for example, is possible in the cabinet. whether leaks are present or vapors are coming out uncontrollably. Indicates the status of not exiting. Possible leaks, for example, from a leak in the cabinet floor. It can be determined with the help of humidity sensor. Signals of the humidity sensor are sent to the control unit. It is transferred, depending on the amount of liquid formed, for example, discharge in the cabinet. increases the amount of air supplied. In this case, a status-specific air volume control, example case taking into account the signals of the humidity sensor of the control unit occurs in such a way that the ventilation assembly will increase its power appropriately.

With the aid of the essentially described status-specific air control control unit, a In addition to the vapors formed in the cabinet, as in the example of the substance presentation, described according to document no.

The ventilation assembly may be configured on the cabinet side and/or the building side.

In any case, the control unit is the ventilation on the cabinet side and/or the building side. feeds the system. The present invention in the case of the ventilation device on the cabinet side typically located on or inside the cabinet body. It works together with a fan or blower, which means that the discharge air installation belongs to it. and/or installed inside the supply air installation. building side the last mentioned variant of the ventilation arrangement, however, the ventilation although the device is available separately and away from the security locker. income. For example, in a ventilation device, the ventilation device on the side of a building It may be a component or even an indoor air conditioning unit. so building The ventilation arrangement on the side is essentially present and additionally in accordance with the invention. As a matter of fact, the amount of strength of which can be changed, and even at least over time. in the supply air system of the relevant safety cabinet or It is modified in such a way that it can be changed in the discharge air installation. Optional As a result, the power of the relevant ventilation device is specific to the dangerous substance and/or status-specific, as previously described.

Control unit, sensor and ventilation arrangement according to an advantageous configuration they connect via a bus. This type of bus is mainly offered, because on the one hand the number of installations required can be reduced versus known wiring and on the other hand, an optional change and especially expansion of the bus assembly development via connection, for example with additional safety cabinets and/or sensors It is possible without difficulty. Data transfer normally occurs bidirectionally.

Also, predominantly when the bus is configured as a local network network and data transfer occurs in the form of data frame, especially according to the ethernet standard. it was seen as positive. These types of local networks or data networks are typically are data networks that communicate with each other, either wired or wirelessly. change occurs within a locally limited area, for example extending over a building.

Transmission rates of up to 100 Mbit/s and more observed here, changing the amount of air supplied to or discharged from the cabinet as described is completely sufficient. Because such variations are often inertia of the ventilation assembly on time scales of seconds or more occurs due to It has been found to be advantageous if a large number of safety cabinets are connected to the bus. Because the present invention in this way is typically combined with a laboratory or safety cabinet. not only that a sample does not exist within another equipped area, instead, due to the fact that many security cabinets are often installed It helps. Within the current framework of the invention, these safety cabinets are now bus They can be connected with each other in terms of data technique and even have one or more They can also be connected via upper control units. So for example 3 security cabinets The connected control unit provides data of all sensors of these 3 security cabinets. senses and the associated discharge air system and/or inside the supply air system It also provides time-dependent air quantity control.

Here, each safety cabinet is equipped with its own discharge air system or a supply can be equipped with air system. Often combined with installations. then it's normal In this case, it is also possible to work with a common central ventilation system on the side of the building. The component of the ventilation assembly coincides with it.

Besides, each safety cabinet has its own ventilation system on the cabinet side. The fact that it is equipped with a mechanism is of course within the scope of the invention.

In addition, each safety cabinet can have its own control unit and it can be connected to the bus via it. Separately with the help of individual control units The ventilation devices on the cabinet side can be fed separately from each other.

individual control units or one or more overhead control units It is also possible for the units to feed the ventilation system on the side of the common central building. possible.

As a result, the upper control units are equipped with a common central ventilation system and/ or they are in communication with the ventilation mechanisms on the side of the individual cabinet.

The same applies to control units on the individual cabinet side. On the data path The communication of the connected control units is typically a master/slave at this time. (master / slave) occurs through the order. That is, the many data bus-connected a number of control units give their orders individually to the ventilation on the cabinet side. They transfer them to the common central ventilation mechanism in hierarchical form for their arrangement.

This hierarchical management of the response to the common resource in the form of a common bus It allows participants to split the data channel according to a pre-given pattern. For example, a control unit or a higher control unit can be used as a master participant. always control the common central ventilation system via the bus can be thought of. So in this case, the master control unit is based on time. its control with the common central and often the ventilation mechanism on the building side. undertakes in conjunction. The other control units are then only the master. a “polling” (“Inquiry”) the slave-control units belonging to the control unit. It is used together when questioned. One way or another, the present invention is the discharge air belonging to an individual safety cabinet. system or the supply air system and the control unit and a cabinet side as an island solution in the same way as the ventilation arrangement, the air supplied to it the amount of air discharged from it or the amount of air discharged from it depending on time. the amount of air that can be changed or time-dependent with the help of the control unit creates the possibility of operating the control as it would occur.

Next to this island solution, you can only use multiple security cabinets, for example a room. not only to be combined into it, but also even to be distributed in a large number of rooms. general purpose that will combine all the security cabinets that may be installed in one building. concepts can also be considered. Here each individual safety locker is separated from the other in terms of the amount of air supplied or self-discharged may vary. For this, it is often on the side of the cabinet that belongs to a ventilation system is used. Likewise, generally fed into the safety cabinet or jointly changing the amount of air discharged from it may also be considered. This In this case, a common central ventilation arrangement is normally used. This too a component of a directly existing building-side ventilation device, For example, it can be a component of an air conditioner or household equipment in general. Here has fundamental advantages.

By means of only one drawing, which is shown in the example of application of the invention below, is explained closely.

Figure 1 shows a security cabinet in perspective and Figure 2 is a multi-media unit connected to a bus equipped with the device according to the invention. indicates a number of security lockers.

In figure 1, it only serves to store the chemicals (1) shown there. A safety locker or a hazardous materials locker is shown. of chemicals (1) on the cabinet body (2) to be placed inside the cabinet or security cabinet In the application example, two swing-wing doors (3) are connected. Swing doors (3) With its help, an entrance opening into the cabinet body (2) is closed and opened. Mainly if Of course it is also possible to work with a single swing door (3), but this is not shown.

In the application example of swing-wing doors (3), a user can simultaneously It can be opened and closed by one hand (one-handed operation). Besides that, two Fifty-one uses are possible and the two swing doors (3) can be operated separately from each other. ambidextrous use is also encompassed by the invention. Also an automatic door opening and the door closer is also covered by the present invention. But this is not shown.

As is known, the cabinet body (2) has side walls (Za) and a head or ceiling wall (2b), a bottom wall (20) and finally a rear wall (2d). revolving flap doors (3) into the cabinet body (2) in a rotatable manner around the vertical axes (4) they are attached. Two revolving door leaves (3) in the application example and without restrictor on a common connector (5) or related connectors (5) they are attached. The fastener (5) or the two fasteners (5) of the ceiling wall They form an assembly in the area (2b). Single link in application instance The revolving door leaf (3) is connected via the pull rods (6) with the element (5) works on it.

In the example of the ceiling wall (2b) of the cabinet body (2), one or more equipped with an opening, which also allows a discharge in the display and without restrictive The air system (7) is connected. A sensor (8) in the discharge air installation (7) inserted for quantity measurement. Finally discharge air with the aid of the sensor (8) the amount of air discharged from the inside of the cabinet body (2) from the installation (7) can be detected and can be converted into suitable measuring signals. The sensor (8) is the current sensor for this purpose. may be configured for volume flow measurement. Inlet side and exit side A sensor (8) that detects a pressure difference on the side of it can also be considered here.

In addition, there is a ventilation in the discharge air installation (7) shown. mechanism (9) is seen and this is the cabinet according to figure 1* in the application example. placed on the side, that is, it belongs to the safety locker shown and is there is a mechanism near or near it.

The ventilation assembly (9) is also connected to a control unit (10) like the sensor (8). is connected. For this purpose, a data bus (11) in total in the application example has been carried out. Supplementary the sensor (8) in the discharge air system (7). A control unit (12) is also provided for measuring the amount of air, which application example, on an outside cabinet door or on a swing-leaf door (3) is placed. A humidity sensor (13) is also visible. Both control unit (12) and the humidity sensor (13) are also in communication with the control unit (10).

This occurs via the bus (11).

stored in the cabinet body (2) with the help of the control unit (12). The data and parameters about the chemicals (1) are transferred to the control unit (10).

As explained in the introduction, here the amount of the relevant chemicals (1), their vapor pressure and, if necessary, their potential for danger it could be. Accordingly, the control unit (10), the ventilation device (9) It sets an initial value for a power it is commanded to.

This power is, for example, how much the vapor pressure of the related chemicals (1) at normal temperature The higher it is, the larger it is set. As a result, the sensor (8) the connected control unit (10), the ventilation device (9) with the appropriate power. feeding and as a result, an air flow in the discharge air system (7). the application of the quantity control to the dangerous substance in the example case described special, that is, dangerous substances or chemicals placed inside (1) It ensures that it is applied depending on the amount and density.

With the help of the control unit (10), this optional dangerous substance-specific air quantity In addition to the control, a mandatory timed air quantity control according to the invention It is applied inside the discharge air installation (7). Air quantity control based on this time a time not clearly shown and contained in the control unit (10) given in advance by the employee. Indeed, in this context and in the introduction as described, the ventilation device (9) of the control unit (10), for example depending on the time of the day and / or depending on the days of the week, thus realizing the time-dependent air volume control in general. can also be considered.

As a result, discharge from the safety cabinet via the discharge air system (7). discharged air e.g. air delivered during normal operating times is set to a normal value of the amount of is dropped. Likewise, there is a weekly timetable in the discharge air installation (7). air quantity control is performed.

Time-dependent amount of air in the previously mentioned discharge air installation (7) control and in the optional discharge air system (7). In addition to the present invention, as a supplement to the specific air quantity control, a It also opens the possibility of applying status-specific air volume control. to this status The special air quantity control is in favor of the instantaneous state of the safety cabinet. In this context for example, data transferred from the humidity sensor (13) to the control unit (10) is evaluated. Likewise, the data of the door opening sensor (14) are evaluated. For example, the door opening sensor (14) has one or two swing wings in the application example. reports that the door (3) has been opened, then in this control unit (10), so that the power of the ventilation assembly (9) is increased, for example, the cabinet The entrance opening of the vapors of the chemicals (1) formed inside the body (2) It is converted to prevent it from getting out of the way to a large extent. in a similar way The power of the ventilation device (9) is transmitted through the control unit (10), the humidity accumulating on the bottom of the cabinet body (2) or the floor wall (20) of the sensor (13), result from a leak, for example, from a tank or cabinet containing chemicals (1) It is raised for the case of registering liquid, which may appear as In this case too, In any case, in order to avoid a possible health hazard of the user personnel, increased power of the ventilation device (9) discharge of the humidity sensor (13) It is necessary to increase the amount of air conveyed from the discharge air installation (7). it helps to.

The control unit 12 is equipped with a display unit 15 in the exemplary embodiment.

By means of this display unit (15), a user can come from outside and with closed rotary vane. also on doors or cabinet doors (3) the relevant status of the safety cabinet, the transplanted amount of discharge air etc. may have information about Thus, the display unit (15) additionally the data detected by the humidity sensor (13) and the assigned data can report leaks. Likewise, a doner that is probably not completely closed swing door or cabinet door (3) with the help of the door opening sensor (14). is detected. That is, the display unit (15) generally functions as a status/warning indicator. The control unit (10) is on the cabinet side according to figure 1 in the example shown. is foreseen. That is, the relevant and shown security cabinet is its own special and It is equipped with its own control unit (10). This is the separate closet side next to the control unit '(10) and a control unit (10) at the top. There is also the possibility of realizing this in the diagram drawing in figure 2 shown. In this case, a control unit (10) is used for three separate safety cabinets. envisaged and placed above it. In this case, the upper control unit (10) the data of the sensors (8, 13, 14) connected to the relevant safety cabinet, and collects the data of the control unit (12).

In terms of the ventilation mechanism (9), different arrangements can be considered and the invention appropriately covered. Indeed, an application example is a cabinet according to Figure 1 the ventilation device (9) on the side, that is, directly into the relevant safety cabinet. This type, which is connected and located within its perimeter or directly in the cabinet shows a ventilation device (9). By contrast, figure 2 is on the side of a building. shows a variant that works with the ventilation assembly (9). side of this building the ventilation device (9) is directly present in the house technique, an air-conditioning unit etc. It could be a component. So in this case the individual safety shown there cabinets that belong to it, together with the cabinet body (2), which belong to them separately. they are not equipped with the ventilation devices (9) on the cabinet side, but instead Discharge of the discharge air individually via the relevant discharge air installations (7) and only with the help of the common central and building side ventilation device (9) it occurs. This is a cabinet, individually or in addition to all safety cabinets. except, of course, that they may be equipped with the ventilation device (9) on the side does not hold. This is not shown.

As explained and especially as can be seen in figure 21, the bus (11) control unit (10), at least one sensor (8) and ventilation device (9) In order to be connected with each other in terms of technique, the mentioned units (8, 9, 10) must be connected to each other. are envisaged so that they can communicate with The bus (11) is wired or It can also be done wirelessly, as this is generally a local network network. It is structured as is angered. Of course, other complex forms are also available for individual sensors (8 or 13, 14). for example, in communication with the wirelessly connected control unit (10) be found, whereas the control unit (10) is configured as a cable. also as it feeds the ventilation assembly (9) via a bus installation. conceivable.

Data transfer via bus (11), especially data according to the ethernet standard occurs in frame form. Here in the example of application according to figure 2* Generally, three security cabinets are connected to the bus (11). bus character In addition, if necessary, it can be connected to other security cabinets. presents. Of course, it is possible to work with multiple buses (11) within a building, for example. This is not shown.

As explained, the control unit (10) is configured as the upper control unit (10), that is, the signals of the sensors (8, 13, 14) from a large number of safety cabinets and evaluates the signals of the control unit (12). Apart from this, complementary or alternatively, each security cabinet has its own It is also possible to equip it with a control unit (10). Similarly, closet The ventilation arrangements (9) on the side can be realized as shown in figure 1.

Alternatively or additionally, central ventilation devices on the building side (9), can be used as shown in figure 2_ The upper control units (10) also have a common central ventilation system. They can communicate with (9) in accordance with the illustration in figure 2, but also in figure 2. data technique in accordance with the example situation in fig. 1 with ventilation devices (9) It is also possible to connect them in terms of Numerous elements or control units (10) and different sensors (8, 13, 14) and the control element (12) also wants to use the bus (11) or usually a Master/Slave when they want to use it for data transfer. works with the layout. This applies in particular to the control units (10). So one or realization of more control units or upper control units (10) one of these control units (10) during the operation of a Master control unit (10) takes over the task. On the other hand, the other control units (10) are the slave control unit. (10) they serve as. In particular, as shown in figure 2, only one (one) for the case that the ventilation device (9) on the building side has been implemented Indeed, in such a case, the Master control unit (10) is located in the central common building. It is used to control the power of the ventilation mechanism (9) on the side. This Master power of the ventilation device (9) depending on the data of the control unit (10) appropriately adjusted and given in advance. Produced in this way and related discharge air with the amount of air discharged through the installations (7) then all other safety cabinets are also fed in the sample case. In this context, of course, mainly, Master to rank individual other Slave control units (10) of the control unit (10). for the ventilation system (9) on the side of the central common building. It is also possible to modify the possible data appropriately according to the query results. conceivable.

Ventilation device (9) or multiple ventilation devices (9) In addition to the described control, often a regulation circuit has been carried out. That is, the control unit (10) controls the ventilation mechanism. It gives electrical power. According to the signals of the corresponding sensor (8), this electrical power It can be modified as a regulation for the ventilation device.

Claims (1)

REQUESTS 1. Method for controlling the amount of air supplied to or discharged from a safety cabinet, according to which a discharge air line (7) and/or supply air line is connected to a cabinet body (2), in which also the discharge air line (7) and / or the signals of at least one sensor (8) located in the supply air system are evaluated for air quantity measurement, and a time-dependent air quantity control in the discharge air system ( 7) and/or in the supply air installation, its feature is; It is characterized in that, with the help of the control unit (10), additionally 'specific and status-specific air quantity control for a dangerous substance occurs. . Method according to claim 15, characterized in that the control unit (10) supplies a ventilation device (9) on the cabinet side and/or the building side. Method according to claim 1 or ?, characterized in that the control unit (10), the sensor (8) and the ventilation device (9) communicate via a bus (11). . Method according to claim 3.9, characterized in that the bus (11) is configured as a local network network and the data transmission takes place in the form of a data frame, especially according to the ethernet standard. . Method according to claim 3 or 4, characterized in that a large number of security cabinets are connected to the bus (11) and even via one or more upper control units (10) and/or a control unit (10) on each cabinet side. characterized by. . The method according to one of the claims 1 to 5, and its feature is; it is characterized by the fact that the control unit (10) is fed separately from each other in the ventilation devices (9) on the side of the separate cabinet belonging to the cabinet. . The method according to one of the claims 1 to 6, and its feature is; They are characterized by communicating with the ventilation devices (9) on the side of the relevant control cabinet.