DE10228131B4 - Safety plug-in device for an exhaust air system - Google Patents

Abstract

Safety plug-in device (40) for an exhaust air system for removing air from a room, with
- A housing (53) to which a plug means (42) for insertion into a socket and for connection to a power supply device which is coupled to the socket, and a plug receptacle (46) for receiving a plug (49) of a power supply line (51 ) of an exhaust air system are formed,
- One in the housing (53) arranged switching means (50) for interrupting or closing an electrical connection between the plug means (42) and the plug receptacle (46), wherein the switching means (50) is designed to control signals from a coupled to a Zuluftsystem Receive control member and the electrical connection between the plug means (42) and the plug receptacle (46) in response to received control signals from the control member to interrupt or close,
- One on the housing (53) provided safety device (54) between an open position, in which the plug (49) of the power supply line (51) of the exhaust system in the ...

Description

The The invention relates to a safety plug-in device for an exhaust air system for discharging of air from a room with a housing to which a plug device for insertion into a socket and for connection to a voltage supply device, which is coupled to the socket, and a connector receptacle for Receiving a plug of a power supply line of a Exhaust air system are formed, and one arranged on the housing Switching device for interrupting / closing an electrical connection between the plug and the plug receptacle, wherein the switching device leads out is to control signals from a coupled to a Zuluftsystem Control member to receive and the electrical connection of the connector device and the plug receptacle depending of received control signals from the controller to interrupt.

at the exhaust system, which for use in the safety plug-in device is introduced it may in particular be an extractor hood, an exhaust air dryer, a gas boiler, an exhaust fan, an exhaust system or a central Vacuum cleaner system act.

Such exhaust air system is for example from the document DE 100 28 333 A1 is known and used in connection with exhaust systems in rooms with access to a fireplace, such as an open fireplace, a tiled stove, a charcoal stove, an oil stove, a gas boiler or the like. With the help of the exhaust system, air is transported out of the room to the outside. The safety circuitry is used to control the tap and the supply of electrical voltage for the operation of the exhaust air system.

There in rooms with the fireplace when burning the fuel carbon dioxide and carbon monoxide can arise, transporting air with Help the exhaust system from the interior of the room to dangerous outside Situations for Lead people in the room. With the help of the known safety circuit arrangement is ensured that this Exhaust air system can only be operated when a supply air system via a supply air guaranteed by fresh air is. The air supply system may be, for example, a supply air flap or to act a window.

The known safety circuit arrangement comprises a control member with a Radio transmitter. When the supply air system is closed, the radio transmitter generates a first control signal. The first control signal is sent to a receiver, which is coupled to a switching device. Due to the first control signal interrupts the switching device a voltage supply of the Exhaust system, so that operating the exhaust air system is not possible with closed air supply system. When the air supply system is opened is the radio transmitter generates a second control signal, which then sent to the radio receiver becomes. The radio receiver evaluates the second control signal and causes the closing of the power supply of the Exhaust air system with the aid of the switching device, so that the exhaust air system when open Can be operated air supply system.

One open Zuluftsystem means in living spaces, that air from the outside pour in can. Residents of the residential building This is perceived as unpleasant in winter, for example cold air from the outside flows. As a result, there are cases occurred in which the security circuitry coupled power supply the exhaust system for bypassing the safety circuitry was manipulated to the exhaust system even with closed air supply system to be able to operate. This leads however, to an increased Security risk.

From the publication DE 92 02 667 U1 is a pluggable in an electrical socket timer, to which a junction box for electrical consumers is formed. Furthermore, blocking elements for securing programmed Schaltzeichen against unwanted changes and for securing the device located in the junction box of the timer power plug of the electrical load against pulling are formed on the timer.

The publication DE 298 10 093 U1 describes a safety circuit arrangement for cooker hoods, wherein a mounted on a window of the room with the hood control member for actuating a comb relay is formed with the window open. The comb relay closes with a window open via a contact the current path to a hood supplying the power socket and interrupts it when the window is closed.

The publication DE 33 27 087 C1 describes an adapter for securing power plugs against unauthorized use of equipment, which has, for example, the shape of an intermediate plug or a header. The adapter has its own power plug and at least its own built-in power outlet. About the built-in socket is a generally suitable for a plurality of different power plug capping means of a locking device in different positions lockable. By the same locking device is further a switch operable, the electrical connection between the plug and socket of the intermediate piece controls.

task The invention is an improved safety plug-in device of the type mentioned above, in which the possibilities an undesirable Manipulation, which leads to a security risk, reduced are.

These The object is achieved by a Safety plug-in device according to claim 1 solved.

One significant advantage, which with the invention over the Prior art is achieved, is that with the Security device in addition a protection against circumvention of the safety circuitry created when operating an exhaust system. The taking out the plug of the power supply line of the exhaust air system and the subsequent one Introduction of Plug in a socket is possible only with increased effort.

One Another advantage of the invention is that by means of the locking means according to the invention an unauthorized withdrawal of the plug of the voltage supply line the exhaust system is further difficult.

A appropriate training the invention provides that the Safety device is pivotally mounted on the housing, so that the safety device between the open Position and closed position can be pivoted. hereby is the handling of the safety plug-in device for the user pleasantly designed.

A With little effort feasible integration of safety connector in a safety circuit for an exhaust air system is included an advantageous development of the invention thereby ensured that the Switching device over a cable connection for receiving the control signals to the control member is coupled.

A independent of electrical cables implementation is in a preferred embodiment the invention achieved in that the switching device to a radio receiver for receiving the control signals from the control member is coupled.

A economical and with the help of simple mechanical means executable implementation is included an appropriate training the invention provided in that the locking means screwing means include.

A simple and even more common Use reliable working embodiment is created in a development of the invention in that the detection means include a microswitch.

A appropriate training the invention provides that the Detection means comprise an electromagnetic switch, whereby an embodiment of the detection means without mechanically moving Components possible is.

A Further improvement of the safety standard is in an expedient embodiment the invention achieved in that the detection means with interact with the locking means.

The Invention will be described below with reference to exemplary embodiments with reference closer to a drawing explained. Hereby show:

1 a schematic block diagram for explaining a safety circuit arrangement for exhaust air systems;

2 an embodiment of a switching device;

3 a safety plug device with cap;

4 a cap;

5 a schematic representation of an arrangement of electrical / electronic components in an embodiment in which the control signals are transmitted via a radio link; and

6 a schematic representation of an arrangement of electrical / electronic components in another embodiment, in which the control signals are transmitted via a cable connection.

1 shows a schematic representation for explaining a safety circuit arrangement for an electrically operated exhaust air system, for example, a cooker hood, a vented dryer, a gas boiler or the like. A control element 1 comprises a contact device 2 and a transmitter 3 , The contact device 2 is connected to a fresh air system 4 coupled, with which a room air can be supplied.

At the contact device 2 it may be, for example, a reed contact or a mechanical button. The contact device 2 can occupy at least two switching states. The contact device 2 is in one first switching state when the air supply system 4 is open. The air supply system 4 is for example a window or a supply air flap. In principle, the air supply system can be any device that can be opened and closed in order to transport supply air into a room or to interrupt the supply air flow. In the simplest case, it is a closable with a flap opening in a wall surrounding the room or in a roof. The transmitter device 3 recognizes by the switching state of the contact device 2 whether the air supply system 4 is open or closed. If the air supply system 4 is open, generates the transmitter device 3 a first control signal and transmits it to one of the transmitter means 3 spatially separated receiver device 5 , A second control signal is received from the transmitter 3 to the receiver device 5 transmitted when the transmitter device 3 based on the switching state of the contact device 2 recognizes that the air supply system 4 closed is.

Depending on whether the receiver device 5 the first or second control signal is received, that closing or opening of a switching device 6 causes. The switching device 6 is in a voltage supply line 7 an exhaust system (not shown) coupled. By closing or opening the voltage supply line 7 with the help of the switching device 6 an electrical operation of the exhaust air system is enabled or prevented.

The transmitter device 3 and / or the contact device 2 are supplied with the help of a battery with the necessary electrical energy. To improve the safety standard can be provided that at low battery power, the second control signal which is sent when the air supply system 4 is closed, is still sent, while the first control signal, which is an open air supply system 4 indicates, is suppressed. In this way, it is ensured that at the time of acceptance and subsequent failure of the battery as the last control signal always the second control signal is sent, which prevents operation of the exhaust air system.

For transmitting the first and the second control signal is between the transmitter device 3 and the receiver device 5 a communication connection 8th educated. This can be a cable connection or a radio connection. In the case of the cable connection, the control signals without the interposition of transmitter and receiver device 3 . 5 directly from the contact device 2 to the switching device 6 be transmitted. When the first and second control signals are transmitted by means of radio signals, the transmitter device is 3 a radio transmitter and the receiver device 5 a radio receiver. The communication between the radio transmitter and the radio receiver takes place in an approved VHF range, for example 433 MHz.

According to 1 is between the receiver device 5 and another transmitter device 20 another communication connection 21 educated. The further transmitter device 20 is from another controller 22 comprises and to a further contact device 23 coupled. The further contact device 23 stands with another air supply system 24 in conjunction, so that in dependence on an open or a closed state of the other air supply system 24 a further first or a further second control signal from the further transmitter device 20 to the receiver device 5 could be transferred. In a transmission of the control signals by radio are for the communication link 8th and the further communication connection 21 different frequency ranges used, so that a distinction between the first, the second, the further first and the further second control signal is possible.

The control element 1 and the other control member 22 are each connected to a power supply 9 respectively. 25 connected. At the power supply 9 respectively. 25 it is preferably a battery that can be conveniently recharged by solar energy. In order to avoid an error at low battery power such that the receiver device 5 has received as the last control signal, the second and the further second control signal, although the air supply system 4 and / or the further air supply system 24 are closed, the first and the further first control signal are always of lower signal strength than the second and the further second control signal, so that at low battery power, the second and / or the further second control signal are still received, while the signal strength of the first and the other first control signal is no longer sufficient to be received. Here, it is assumed that the signal strength of the transmitted control signals depends on the available battery power.

According to 1 is the receiver device 5 with a voltage source 10 connected. This may preferably be a connection to a landline.

2 shows an embodiment of a control member schematically. A control element 30 has a battery 31 to supply power to a transmitter 32 , The transmitter 32 stands with a reed contact 33 in connection. Adjacent to the reed contact 33 is a magnet 34 arranged. Depending on the switching state of the reed contact 33 the transmitter generates 32 which in conjunction with 1 described control signals which are transmitted via the cable connection or the radio link to close or open the voltage supply of an exhaust air system. The switching state of the reed contact 33 depends on whether the air supply system to be monitored (in 2 not shown) is open or closed.

3 shows a side view of a safety connector assembly 40 in connection with an implementation of the security circuitry according to the 1 and 2 can be used. On a back 41 the safety plug-in device 40 is a plug device 42 with plug contacts 43 . 44 educated. The plug device 42 serves to the safety plug-in device 40 in a standard socket, for example, a 220/230 V outlet of a household power supply. On a front side 45 has the safety connector 40 a plug receptacle 46 with connection sockets 47 . 48 on. The plug contacts 43 . 44 and the sockets 47 . 48 are in 3 each arranged one above the other for a better illustration; Usually, however, they were arranged one behind the other in the form of representation according to FIG. The exact location of the plug contacts 43 . 44 and the sockets 47 . 48 however, one another is not important to the invention.

In the plug receptacle is a plug 49 introduced. The sockets 47 . 48 are via a switching device 50 with the plug contacts 43 . 44 the plug device 42 connected. With the help of the switching device 50 can the electrical connections between the plug contacts 43 . 44 and the sockets 47 . 48 closed or interrupted. In this way, an electrical voltage is generated by means of the plug contacts 43 . 44 is tapped when the connector device 42 inserted into a socket, through the sockets 47 . 48 provided the switching device 50 the electrical connections between the plug contacts 43 . 44 and the sockets 47 . 48 closes. With the help of the plug 49 The electrical voltage can then be tapped so that they are connected via a power supply line 51 an exhaust system (not shown) is supplied.

The switching device 50 switches the electrical connections between the plug contacts 43 . 44 and the sockets 47 . 48 in response to a control signal supplied by a receiver device 52 which is also housed in a housing 53 the safety plug-in device 40 is arranged. The receiver device 52 receives the control signals from a transmitter device (in 3 not shown), which communicates with a contact device of a Zuluftsystems in connection, as in connection with the 1 and 2 was explained. The receiver device 52 In this case, it is possible to exchange electronic data signals via a cable connection or a radio connection with the transmitter device.

According to 3 is at the safety plug-in device 40 a cap 54 provided between a closed position (solid line in 3 ), in which the plug 49 is covered, and an open position (dashed lines in 3 ) can be relocated. At the in 3 illustrated embodiment, the cap 54 on the housing 53 the safety plug-in device 40 with the help of a hook 55 held by an opening in the housing 53 attacks. In this embodiment, the cap can completely from the housing 53 be solved, ie removed to the plug 49 from the plug receptacle 46 to take out or the plug 49 in the Stekkeraunahme 46 introduce. Alternatively, it may be provided in one embodiment that the cap 54 on the housing 53 is pivotally mounted, for example by means of a hinge.

The cap 54 is in the closed position with the help of a screw 56 on the housing 53 locked so that the plug 49 not from the plug receptacle 46 can be removed. When screwing in the screw 56 for locking the cap 54 on the housing 53 has an end 57 the screw 56 on a switch 58 so that with the help of the switch 58 can be detected, whether the cover plate 54 with in the closed position and by means of the screw 56 is locked. The desk 56 gives a signal dependent thereon to the switching device 50 , Alternatively, it may be provided in one embodiment that the switch 56 from one to the cap 54 trained projection is actuated when the cap 54 placed in the closed position. In this case, the screw is used 56 only for locking the cap 54 ,

The switching device 50 is designed so that the electrical connection between the contact terminals 43 . 44 and the sockets 47 . 48 can only be closed when using the switch 58 it is found that the cap 54 is in the closed position. The achieved in this way automatic detection of the locking state of the cap 54 is an additional measure to ensure that a power supply via the plug 49 and the power supply line 51 can only take place when the cap 54 closed is. The provision of the cap 54 Alone, however, already causes the plug 49 against unwanted removal from the socket 46 can be secured. This measure for yourself Improves the safety standard when operating exhaust air systems with the help of a safety circuitry, as used in conjunction with the 1 and 2 has been described.

The locking of the cap 54 in the closed position can be carried out by suitable means. Thus it can be provided in an advantageous embodiment that a screw from the back 41 the safety plug is screwed to the cap 54 to lock. As a screw, a special screw can be used, which is rotatable, for example, only in one direction or with the help of special keys.

It can also be provided that the switch 58 is executed as a switch, already by an approximation of the cap 54 is operated in the closed position, without additionally using a locking means. For example, an optical or a magnetic switch could be used. But also a button can be used, in which a feeler is operated when the cover plate 54 is brought into the closed position.

4 shows an embodiment of a cap 100 , To be used in conjunction with various plugs of exhaust systems are on the cap 100 precuts 101 provided that can be broken down in whole or in part, to be adapted to different connector types. With the various types of connectors, the voltage supply line for the exhaust air system can be removed from the cover at different points 100 escape.

5 shows a schematic representation of an arrangement of electrical / electronic components in an embodiment in which the receiver device 52 (see. 3 ) is a radio receiver. The receiver device 52 stands with the switching device 50 in connection to the electrical coupling between the sockets 47 . 48 and the plug contacts 43 . 44 to close / interrupt. At the in 5 shown schematic representation of the switch 58 unlike the illustration in 3 to the receiving device 52 coupled. The circuitry implementation of the improved security concept can be done in various ways. It is essential that the connection between the plug contacts 43 . 44 and the sockets 47 . 48 only then is closed, albeit by the switch 58 there is a signal that the cap 54 (see. 3 ) is in the closed position.

According to 5 is still an optical signal transmitter 110 to the recipient institution 52 coupled. With the help of the optical signal transmitter 110 , which is designed for example as a light-emitting diode, can be signaled to the user of the safety plug-in device, whether a power supply to the sockets 47 . 48 guaranteed or not. For this purpose, the optical signal transmitter is expedient from outside the housing 53 (see. 3 ) visible to the user.

6 shows a schematic representation of an arrangement of electrical / electronic components in another embodiment, in which the control signals from the contact device of the air supply system via a cable connection 120 be transmitted. The control signals go directly to the switching device 50 showing the electrical coupling between the plug contacts 43 . 44 and the sockets 47 . 48 closes / interrupts. According to 6 is still a transformer 130 provided with a voltage for operating two light-emitting diodes 131 . 132 is tapped. With the help of light emitting diodes 131 . 132 the user will see if the electrical connection between the plug contacts 43 . 44 and the sockets 47 . 48 closed or opened. It is the switch again 58 shown, which must be closed, so that at the sockets 47 . 48 a voltage is available. For this purpose, the switch 58 to the switching device 50 coupled.

Claims (8)

Safety plug-in device ( 40 ) for an exhaust system for removing air from a room, comprising - a housing ( 53 ), to which a plug device ( 42 ) for plugging into a socket and for connecting to a power supply device which is coupled to the socket, and a plug receptacle ( 46 ) for receiving a plug ( 49 ) of a power supply line ( 51 ) of an exhaust air system, - one in the housing ( 53 ) arranged switching device ( 50 ) for interrupting or closing an electrical connection between the plug device ( 42 ) and the plug receptacle ( 46 ), wherein the switching device ( 50 ) is adapted to receive control signals from a control element coupled to a supply air system and the electrical connection between the plug device ( 42 ) and the plug receptacle ( 46 ) in response to received control signals from the control member to interrupt or close, - one on the housing ( 53 ) safety device ( 54 ) between an open position in which the plug ( 49 ) of the power supply line ( 51 ) of the exhaust air system in the plug receptacle ( 46 ) or from the plug receptacle ( 46 ) can be taken out, and a closed position is displaceable, - locking means ( 56 ) for locking the safety device in the closed position, whereby a removal of the plug ( 49 ) of the power supply line ( 51 ) from the plug receptacle ( 46 ), and - to the switching device ( 50 ) coupled detection means ( 58 ), with the help of the detection means ( 58 ) it can be determined whether the safety device ( 54 ) in the closed position, so that the electrical connection between the plug device ( 42 ) and the plug receptacle ( 46 ) can only be closed when the safety device ( 54 ) is in the closed position. Safety plug-in device according to Claim 1, characterized in that the safety device ( 54 ) pivotable on the housing ( 53 ) is mounted so that the safety device ( 54 ) can be pivoted between the open position and the closed position. Safety plug-in device according to claim 1 or 2, characterized in that the switching device ( 50 ) is coupled to the controller via a cable connection for receiving the control signals. Safety plug-in device according to one of the preceding claims, characterized in that the switching device ( 50 ) is coupled to a radio receiver for receiving the control signals from the controller. Safety plug device according to one of the preceding claims, characterized in that the locking means ( 56 ) Include screwdrivers. Safety plug-in device according to one of the preceding claims, characterized in that the detection means ( 58 ) comprise a microswitch. Safety plug-in device according to one of the preceding claims, characterized in that the detection means ( 58 ) comprise an electromagnetic switch. Safety plug-in device according to one of the preceding claims, characterized in that the detection means ( 58 ) with the locking means ( 56 ) interact.