Hold-open device for a door

Abstract

The invention relates to a locking device (1) for a door, comprising a holding device (7) for locking the door, particularly in an open position, wherein the holding device (7) can be transferred from a locking state (SZ) to a releasing state (GZ) by supplying electrical energy. According to the invention, the locking device (1) is designed to transfer the holding device (7) from the locking state (SZ) to the releasing state (GZ) when a defect occurs in the intended supply of electrical current to the holding device (7) and / or a predetermined voltage value (UV1) for an energy storage unit (12), which serves to supply electrical energy to the holding device (7), falls below a certain threshold.

Description

[0001] The invention relates to a locking arrangement for a door, comprising a holding device for locking the door, in particular in an open position, wherein the holding device can be converted from a locking state to a releasing state by supplying electrical energy, according to the preamble of patent claim 1. Furthermore, the invention relates to a method for operating a locking arrangement.

[0002] Hold-open devices are widely used in building services engineering for door and gate systems used to equip fire doors in accordance with applicable regulations. The hold-open device allows a door equipped with a mounted door closer to be held open at either a fixed or selected angle until it is electrically triggered. In existing solutions, the individual components of the hold-open device are connected to the building's electrical network for power supply. Particularly when retrofitting or expanding existing buildings, wiring to the building's electrical network creates significant costs. To ensure the wiring is visually acceptable, it may be necessary to pry open walls and ceilings so that the cables can be installed "under the plaster." In the case of historic buildings, retrofitting hold-open devices for fire doors can sometimes cause significant damage.

[0003] WO92 / 04519 A1 discloses a locking arrangement in which the locking arrangement is transferred to the release state upon the supply of energy. The energy is provided by a battery. The locking arrangement is transferred to the release state when the battery voltage falls below a certain level and when the battery is removed.

[0004] The invention is based on the object of providing a locking arrangement and a method for operating a locking arrangement which avoids the aforementioned disadvantage, in particular to provide a locking arrangement and methods which are easy to assemble.

[0005] The problem is solved by independent claim 1. Advantageous developments of the locking arrangement are specified in the dependent device claims, the description, and the figures. Furthermore, the invention is also solved by the features of the independent method claim according to independent claim 11. Advantageous developments of the method are specified in the description and the figures. Features and details described in connection with the locking arrangement according to the invention also apply in connection with the method according to the invention, and vice versa.

[0006] According to the invention, the locking arrangement is designed to transfer the holding device from the locking state to the releasing state when a defect occurs in the intended supply of electrical current to the holding device and / or a predetermined voltage value for an energy storage unit which serves to supply electrical energy to the holding device is undershot.

[0007] The locking arrangement according to the invention implements the working current principle. It is provided that the locking arrangement is designed to transfer the holding device from a locking state to a releasing state by supplying electrical energy. In particular, it is possible for the holding device to be in the locking and / or releasing state without the supply of electrical energy. This enables energy-saving operation of the locking arrangement. The energy-saving operation makes it possible to dispense with cabling to the building's electrical network and thus provide a locking arrangement that is easy to install. The locking state of the holding device is understood in particular to be a state in which the holding device serves to lock the door.The released state is understood in particular to mean a state in which the holding device has released the door, so that the door is movable, in particular closable. In the released state, a door operator present in addition to the locking arrangement is permitted, in particular, to close the door from the previously held position. The transfer of the holding device from the locking to the released state thus serves in particular to release the door. Optionally, it can be provided that the holding device can be transferred from the released state to the locking state by supplying electrical energy.

[0008] Due to the inventive design of the locking arrangement, the holding device is always transferred to the releasing state when a transfer can no longer be safely guaranteed at a later time, in particular in the event of a fire. In particular, the transfer to the releasing state always occurs when only the energy for a predetermined number of transfers, in particular for one transfer, is reliably available and / or when the initiation of the transfer to the releasing state can no longer be safely guaranteed. A defect in the intended supply of electrical power to the holding device therefore also includes defects that affect the control of the transfer.

[0009] The locking device according to the invention achieves a high degree of release reliability, so that the door is released safely and reliably in the event of danger, particularly a fire. The locking device is particularly preferably battery-operated and thus independent of an external power supply. The locking device is, in particular, free from any electrical connection to the building's power grid.

[0010] The energy storage unit can have one or more electrochemical energy storage devices. The electrochemical energy storage device can be configured as a battery or an accumulator. The multiple energy storage devices can be connected in series and / or in parallel. For example, several, e.g., two, energy storage devices can be connected in series, and the rows of energy storage devices can be connected in parallel. In particular, the energy storage unit can be configured as an energy storage package with multiple energy storage devices.

[0011] The locking arrangement preferably comprises a hazard detector, in particular a fire and / or smoke detector. The hazard detector can transmit a trigger signal, particularly in the event of a fire, to a control device of the locking arrangement. The control device then controls the holding device, so that the holding device is transferred from the locking to the release state.

[0012] The locking arrangement can comprise a sliding element in a slide rail. The sliding element can preferably be locked and / or released within a slide rail by the holding device. This means that when the holding device is transferred from the locking to the releasing state, the sliding element is released, so that the sliding element becomes movable in the slide rail. The sliding element can be connected to the door. In the locking state, the sliding element is locked in the slide rail by the holding device. Preferably, the holding device, in particular a holding mechanism of the holding device, blocks the sliding element in the slide rail in the locking state. In the releasing state, the sliding element is movably arranged in the slide rail, so that the door is also movable. Such a holding device is disclosed in DE 10 2010 061 246 A1.In particular, the energy storage unit, the slide rail, the hazard detector, the holding device, and the control device can be arranged on a door frame. Particularly preferably, the energy storage unit, the slide rail, the hazard detector, the holding device, and the control device are arranged in a common housing.

[0013] In particular, the holding device is designed to lock the door in the open position. Accordingly, the locking arrangement is preferably designed to transfer the holding device to the release state upon transmission of the trigger signal, so that the door can be closed.

[0014] According to the invention, the locking arrangement has at least one intermediate energy store, which is designed in particular as at least one capacitor element, in which an amount of electrical energy can be stored, by means of which the holding device can be transferred from the locking state to the releasing state. In particular, the sliding element can be released by means of the amount of energy. By providing an intermediate energy store, the holding device can be transferred to the releasing state at least once even in the event of a defect in the energy storage unit or in an electrical connecting line of the energy storage unit. The installation of the intermediate energy store can thus contribute to the reliability of the locking arrangement, which operates according to the open-circuit current principle. Furthermore, it may be the case that only the intermediate energy store can provide sufficient current for the magnetic coil.The recommended maximum continuous current of an energy storage device in the energy storage unit, however, can be between 20 mA and 200 mA, preferably between 60 mA and 120 mA. The maximum pulsed discharge current of the energy storage device can be between 80 mA and 400 mA, preferably between 150 mA and 250 mA.

[0015] Preferably, at least twice the amount of energy required to transfer the holding device can be stored in the intermediate energy storage unit. The intermediate energy storage unit is, in particular, electrically connected between the energy storage unit and the holding device. Particularly preferably, the amount of energy supplied to the energy storage unit can only be supplied via the intermediate energy storage unit of the holding device. The intermediate energy storage unit can, in particular, only be recharged from the energy storage unit.

[0016] The control device, in particular a microcontroller, can be configured to initiate the transition of the holding device from the locking to the releasing state when a defect occurs in the intended supply of electrical current to the holding device and / or the voltage falls below the predetermined value. In this case, the control device can detect the defect and / or the voltage falls below the predetermined value.

[0017] According to the invention, a first voltage measuring point is provided for determining a voltage value characterizing the electrical voltage of the energy storage unit. If the voltage value determined by the first voltage measuring point is below the predetermined voltage value, the holding device is transferred to the release state. The first voltage measuring point can be electrically connected in parallel to the energy storage unit and the control device. The predetermined voltage value can, in particular, be a voltage value that can be determined at the first voltage measuring point and characterizes the predetermined voltage of the energy storage unit. The voltage measurement can be carried out at first predetermined time intervals. The first predetermined time intervals can be stored in the control device. The control device can carry out the voltage measurement. In this case, a voltage divider, for example, can be provided at the first voltage measuring point.Alternatively or additionally, the first voltage measuring point can have a voltmeter that transmits the determined voltage value to the control unit. The control unit compares the determined voltage value with the predetermined voltage value and, if necessary, transfers the holding device to the release state. The predetermined voltage value can be stored in the control device. Above the predetermined voltage value, a predetermined threshold value can be provided for a voltage value determined by the first voltage measuring point, at which a warning is issued. As a warning, for example, a light element of the holding arrangement can light up. The light element can flash, for example. The warning alerts an operator that the energy storage unit must be replaced soon.

[0018] The individual electrochemical energy storage device can have at least a ratio V1 of the nominal voltage to a recommended maximum continuous current of 10 Ω ≤ V1 ≤ 40 Ω, preferably 15 Ω ≤ V1 ≤ 30 Ω. Additionally or alternatively, the individual energy storage device can have a ratio V2 of the nominal voltage to a maximum pulsed discharge current of 20 Ω ≤ V2 ≤ 100 Ω, preferably 30 Ω ≤ V2 ≤ 70 Ω. This prevents critical heating of the energy storage device. Additionally or alternatively, a fuse can be provided in the energy storage unit. This can thus contribute to the reliability of the locking arrangement operating according to the open-circuit current principle.

[0019] Preferably, a defect in the intended supply of electrical power to the holding device occurs when a short circuit and / or an interruption occurs within the energy storage unit and / or in the connecting cable of the energy storage unit. Thus, the holding device is transferred from the locking to the releasing state. The intermediate energy storage device can provide the electrical energy. The short circuit or interruption can be caused by the voltage value determined at the first voltage measuring point being below the specified voltage value.

[0020] It can be provided that the holding device has a component through which electrical flow can be carried. The releasing state can be achieved with the aid of the component through which electrical flow can be carried. The component through which electrical flow can be carried can be designed, for example, as a magnetic coil. An element of the holding device, e.g. an armature, can be moved by the component, through which the transfer to the releasing state takes place. For example, a blockage of a holding mechanism of the holding device can be lifted in this case. The component can be part of an actuator, e.g. an electromagnet or an electric motor. In particular, electrical current with different current directions can flow through the component through which electrical flow can be carried. The magnetic fields generated in this way can move the element between two positions that correspond to the locking state and the releasing state.In this regard, reference is again made to DE 10 2010 061 246 A1.

[0021] The locking arrangement can have a measuring point for determining an electrical current flowing through the electrically conducting component, wherein a defect in the intended supply of electrical current to the holding device exists if the determined current lies outside a predetermined value range. The control device can determine the current. A resistor can be provided at the measuring point. In particular, the current is determined by measuring a voltage applied to the resistor. Alternatively or additionally, the current measuring point can have an ammeter that transmits the measured current to the control unit. The control unit checks whether the measured current lies within the predetermined value range and, if not, transfers the holding device to the release state. An upper limit of the value range can be used, for example, to detect a short circuit.A lower limit of the value range can be used, for example, to determine whether there is an interruption in the circuit and / or whether there is sufficient current to generate a sufficient magnetic field to transfer the holding device into the release state.

[0022] The current strength can be determined at second predetermined time intervals. This means that the current strength can also be determined solely for testing purposes. This means that the current strength can also be determined if no transition to the releasing or detecting state is to occur. The second predetermined time intervals can be stored in the control device. In particular, the second predetermined time intervals can be identical. For example, such a measurement can be carried out every twenty-four hours. To ensure that the current flow through the electrically flowable component does not result in a transition to the releasing state during a test, it can be provided that, for the purpose of carrying out the measurement, which is carried out for testing purposes, the electrically flowable component is energized with such polarity that the energization has no effect on the state of the holding device.Additionally or alternatively, the current intensity is determined when the device transitions to the release state triggered by the trigger signal.

[0023] The energy storage unit can be connected to the energy buffer via a voltage converter. The voltage converter can generate a higher electrical voltage in the energy buffer than in the energy storage unit. In particular, the control device can initiate charging of the energy buffer via the voltage converter.

[0024] According to the invention, a second voltage measuring point is provided for determining a voltage value characterizing the electrical voltage of the energy buffer. The second voltage measuring point can be electrically connected in parallel to the energy buffer and the control device. The voltage measurement at the second voltage measuring point can be carried out at predetermined third time intervals. The third predetermined time intervals can be stored in the control device. The control device can carry out the voltage measurement at the second voltage measuring point. In this case, a voltage divider can be provided at the second voltage measuring point. Alternatively or additionally, the second voltage measuring point can have a voltmeter that transmits the measured voltage value to the control unit.

[0025] Preferably, the voltage value characterizing the energy buffer, which was determined at the second voltage measuring point, is compared with a target voltage value. If the voltage value falls below the target voltage value by a predetermined amount, the control device, in particular, initiates the charging of the energy buffer to the target voltage value. The target voltage value can be stored in the control unit. The predetermined time intervals can, in particular, be identical. This ensures that the energy buffer has stored a sufficient amount of energy to transfer the holding device to the release state and has not discharged too far over time.

[0026] According to the invention, a defect in the intended supply of electrical current to the holding device exists if charging of the intermediate energy storage device to a target voltage value within a predetermined charging period. To this end, the control unit can check, in particular, whether the intermediate energy storage device reaches the target voltage value within the predetermined charging period. If the target voltage value is not reached within the charging period, there is a defect in the intended supply of electrical energy to the holding device. In this case, the holding device is transferred to the release state. For example, there may be a short circuit in the intermediate energy storage device or the voltage converter may be defective. Likewise, the intermediate energy storage device may be aged and have a low capacity, so that charging to the target voltage value occurs too quickly.

[0027] The specified charging time period Δt 4 can thus be limited by an upper limit t upper and a lower limit t lower greater than zero. Here, t lower and t upper can be selected depending on the amount to be undershot and the capacitance of the capacitor element. For example, t lower can be selected between 0.1 s and 10 s, preferably between 1 s and 4 s. For example, t upper can be selected between 10 s and 60 s, preferably between 5 s and 30 s. For example, the charging time period Δt 4 can be given by 0.1 s=t bottom ≤ Δt 4 ≤ 60 s=t top or 1 s=t bottom ≤ Δt 4 ≤ 30 s=t top or 3 s = t bottom ≤ Δt 4 ≤ 16 s=t top . In particular, the lower limit t bottom takes into account an aging of the energy buffer, e.g., by 10% to 50%, preferably by 20% to 40%.

[0028] According to the invention, a defect in the intended supply of electrical energy to the holding device exists if a voltage drop determined at the second voltage measuring point during discharging of the energy buffer is greater than a predetermined maximum value for a predetermined discharge period. Due to aging of the energy buffer, the energy buffer can lose capacity. It is also conceivable that the energy buffer has different capacities at different temperatures. However, with a lower capacity, a smaller amount of charge is stored in the energy buffer at a predetermined voltage.In order to prevent the stored charge quantity from being insufficient to transfer the holding device into the release state, the voltage drop during discharge of the energy buffer is checked for the specified discharge period, which is an indicator of the stored charge quantity and thus of the capacity of the energy buffer.

[0029] The maximum value for the voltage drop and / or the discharge time period can be stored in the control device. The comparison between the maximum value and the determined voltage drop can be performed by the control device.

[0030] To determine the voltage drop during the discharge period, the energy buffer is preferably discharged by performing the previously described test, in which the electrically flowable component is energized with such polarity that the energization has no effect on the state of the holding device. Thus, both the current flow through the electrically flowable component and the capacity of the energy buffer can be checked in a single process.

[0031] The locking arrangement may comprise at least two mutually redundant energy buffers and / or at least two mutually redundant electrically flowable components. Thus, in the event of a defect in an energy buffer or an electrically flowable component, the holding device can be reliably transferred to the release position. This makes it possible for the holding device to still be transferable to the release state in the event of a serious defect in the energy buffer and / or the electrically flowable component via the redundant energy buffer and / or the redundant electrically flowable component. The serious defect may, for example, be a short circuit in the energy buffer.Each electrically flowable component is designed in such a way that the releasing state can be brought about without the help of the other electrically flowable component.

[0032] Preferably, at least two subsystems are provided, each comprising at least one intermediate energy storage device and one electrically conducting component, wherein the subsystems are each configured independently of one another. The subsystems are, in particular, mutually redundant.

[0033] It can be provided that the locking arrangement has at least two control devices that monitor each other, wherein a defect in the intended supply of electrical power to the holding device occurs if one control device is faulty. For example, if a cyclic trigger signal is missing, one of the control devices can detect a defect in the other control device and initiate the transfer of the holding device to the release state. The control devices can monitor themselves at predetermined monitoring intervals, which are stored in particular in the control devices. Furthermore, it can be provided that the control devices monitor themselves. For this purpose, for example, CPU and RAM tests can be carried out. In particular, the self-monitoring is carried out at regular, predetermined self-monitoring intervals. If an error is detected during monitoring, e.g.If a fault is detected during the CPU or RAM test, a defect in the intended supply of electrical current to the holding device is detected and the holding device is transferred to the release state, in particular by the other intact control device.

[0034] The at least two control devices can each be part of a subsystem. Thus, each subsystem can extend from the receipt of a trigger signal to the electrically conducting component of the holding device. Each of the subsystems can transfer the holding device to the release state independently of the other subsystem.

[0035] Preferably, a defect in the intended supply of electrical power to the holding device exists if the control device fails to exit a power-saving mode. During a period in which the control device does not need to perform monitoring or transition to the enabling state, the control device can be in a power-saving mode. If the control device cannot exit the power-saving mode, the holding device is transferred to the enabling state. This defect can be detected, in particular, by another control device.

[0036] It is conceivable that a button is provided to enable the holding device to be returned to the locking state after it has been transferred to the release state, in particular after a fire alarm signal has been received and / or the energy storage unit has been replaced. It is also possible that, after a defect has been rectified, in particular a short circuit, e.g. in the energy buffer or in the energy storage unit, it can be returned to the locking state by pressing the button and conducting a self-test. Alternatively, it can be provided that, when the button is pressed, the holding device can only be returned to the locking state if a fire alarm signal has been received and / or if a cyclic hazard detector signal is missing and / or if the energy storage unit has been replaced.

[0037] Preferably, after a specific defect and / or after the voltage falls below the specified value before the energy storage unit is replaced, the holding device remains in the release state. This means that an attempt to secure the door in the open position again fails. In this case, a renewed transfer of the holding device to the locking state can be prevented, particularly upon actuation of the button. For this purpose, in particular, energization of the electrically flowing component in a direction that causes the locking state can be prevented. A defect in which the holding device remains in the release state can be at least one of the following defects: In the event of a short circuit in the connecting cable of the energy storage unit and / or in the intermediate energy storage device, or if other components are damaged. The damage can be determined by a self-test, if the voltage drop determined at the second voltage measuring point when discharging the intermediate energy storage device for a predetermined discharge period is greater than a predetermined maximum value, if the voltage value determined at the first voltage measuring point for the energy storage unit falls below the predetermined voltage value before the energy storage unit is replaced, if the current determined at the measuring point is outside the predetermined value range, if the intermediate energy storage device is charged to a target charging voltage outside the predetermined charging period, or if the control device is defective.

[0038] A capacitor may be provided to supply the control device with electrical energy in the event of a power supply unit failure. In the case of redundant control devices, a capacitor is assigned to each control device. In particular, the capacitor can store at least the amount of energy necessary for the control device to initiate the transfer of the holding device to the release state.

[0039] The predetermined voltage value U V1 can be a voltage value of the energy storage unit at which the holding device can only be securely transferred into the release state once more. Additionally or alternatively, the predetermined voltage value U V1 can be predetermined as a value from an interval 0.5*UN ≤ U V1 ≤ 0.9*UN, preferably 0.65*UN ≤ U V1 ≤ 0.9*UN, particularly preferably 0.75*UN ≤ U V1 ≤ 0.85*UN, depending on the nominal voltage UN of the energy storage unit. For example, the predetermined voltage value U V1 can be a value between 5V and 6.5V, preferably between 5.5V and 6.3V.

[0040] The threshold value US is above the specified voltage value U V1 . In this case, the threshold value can also be a value from an interval of 0.7*UN ≤ US ≤ 0.98*UN , preferably 0.8*UN ≤ US ≤ 0.98*UN , particularly preferably 0.9*UN ≤ US ≤ 0.95*UN . For example, the threshold value US can be a value between 6 V and 7.0 V, preferably between 6.5 V and 6.9 V.

[0041] The nominal voltage value U V2 should be selected such that, depending on the capacitance of the capacitor element used, the charge quantity is sufficient to transfer the holding device to the release state. Preferably, the charge quantity is sufficient for an n-fold transfer to the release state, where n is selected from the range 2 ≤ n ≤ 4, preferably 2 ≤ n ≤ 10. For example, U V2 can be a value from a range of 8 V ≤ U V2 ≤ 16 V, preferably 10 V ≤ U V2 ≤ 14 V.

[0042] The amount B by which the voltage value U 2 determined at the second voltage measuring point may fall below the target voltage value U V2 without charging can be selected as a value from the interval 0.05 U V2 ≤ B ≤ (n-1) / n U V2 . Additionally or alternatively, the amount B can be a value from an interval 0.05 U V2 ≤ B ≤ 0.4 U V2 , preferably 0.05 U V2 ≤ B ≤ 0.2 U V2 , particularly preferably 0.05 U V2 ≤ B ≤ 0.1 U V2 . For example, B can be selected as a value between 0.5 V and 1.5 V.

[0043] The maximum value ΔU V can be selected such that an aging of the capacitor element's capacitance of 10% to 50%, preferably 20% to 40%, is taken into account. Accordingly, the maximum value ΔU V can correspond to a value of 1.1 to 2 times, preferably 1.25 to 1.7 times, the voltage drop of the unaged capacitor element for the specified discharge period. For example, the maximum value ΔU V can be a value between 0.3 V and 1 V.

[0044] The lower limit I 0 and the upper limit I 2 for the current intensity I magnet depend on the current intensity that is required and / or preferred for the electrically flowing component, in particular the magnet coil, e.g. on the nominal current intensity. The lower limit I 0 can, for example, be selected such that the magnet coil generates a sufficient magnetic field above the lower limit I 0 to transfer the holding device into the releasing state. The upper limit I 2 can, for example, be selected such that a short-circuit current is present above the upper limit I 2. For example, the lower limit I 0 can be selected as a value from the interval 0.5* I magnet ≤ I 0 ≤ 0.95*I magnet , preferably 0.6* I magnet ≤ I 0 ≤ 0.9* I magnet , preferably 0.75* I magnet ≤ I 0 ≤ 0.85*I magnet . For examplethe upper limit I 2 can be selected as a value from the interval 1.3* I magnet ≤ I 2 ≤ 3 * I magnet , preferably 1.5* I magnet ≤ I 2 ≤ 2.5* I magnet , preferably 1.7* I magnet ≤ I 0 ≤ 2.2* I magnet . Purely by way of example, the lower limit I 0 can be selected as a value from the interval 300 mA ≤ I 0 ≤ 575 mA, preferably 350 mA ≤ I 0 ≤ 550 mA, particularly preferably 400 mA ≤ I 0 ≤ 500 mA. The upper limit I 2 should be selected as a value within the range 800 mA ≤ I 2 ≤ 2000 mA, preferably 1000 mA ≤ I 2 ≤ 1500 mA. It is conceivable that different currents may be required for the solenoid coil of each subsystem.

[0045] The specified discharge time period Δt 2 can be a very short period of time to avoid unnecessary discharge of the energy storage unit. For example, the specified discharge time period Δt 2 can be specified as a time between 10 ms and 2 s, preferably between 20 ms and 80 ms.

[0046] It may be sufficient to select the second predetermined time interval Δt 3 as a large time interval. For example, Δt 3 can be selected as a value from the interval 2 h ≤ Δt 3 ≤ 48 h, preferably 6 h ≤ Δt 3 ≤ 36 h, particularly preferably 12 h ≤ Δt 3 ≤ 30 h.

[0047] The first predetermined time interval Δt 1 , the third predetermined time interval Δt 5 , the monitoring and / or self-monitoring time intervals Δt 6 , Δt 7 can in particular be identical. For example, 2s ≤ Δt 1 , Δt 5 , Δt 6 , Δt 7 ≤ 20 s, preferably 4s ≤ Δt 1 , Δt 5 , Δt 6 , Δt 7 ≤ 12 s. In particular, Δt 1 , Δt 5 , Δt 6 , Δt 7 can be 8 s. It is conceivable that Δt 1 , Δt 5 , Δt 6 , Δt 7 are also selected as different values ​​within the intervals.

[0048] The object of the invention is also achieved by a method for operating a locking arrangement, wherein the locking arrangement comprises a holding device for locking a door, in particular in an open position, wherein the holding device is transferred from a locking state to a releasing state by the supply of electrical energy. According to the method according to the invention, the holding device is transferred from the locking state to the releasing state if a defect occurs in the intended supply of electrical current to the holding device and / or a predetermined voltage value for an energy storage unit that serves to supply the holding device with electrical energy is undershot.

[0049] The defect may in particular be a defect previously described.

[0050] The invention is illustrated below using an exemplary embodiment and explained in more detail in the figures. In this regard, Fig. 1 shows a locking arrangement according to the invention according to an exemplary embodiment, Fig. 2 shows a schematic circuit diagram of the locking arrangement according to the invention according to the exemplary embodiment, Fig. 3 shows a first exemplary embodiment of a method according to the invention which is stored in a locking arrangement according to the invention, Fig. 4 shows a second exemplary embodiment of a method according to the invention which is stored in a locking arrangement according to the invention, Fig. 5 shows a third exemplary embodiment of a method according to the invention which is stored in a locking arrangement according to the invention and Fig. 6 shows a fourth exemplary embodiment of a method according to the invention which is stored in a locking arrangement according to the invention.

[0051] Fig. 1shows a holding device 1 according to the exemplary embodiment. It depicts a door 2. Mounted on this door 2, in addition to the holding device 1, is a door actuator 3, designed as a door closer. A closer spring is integrated into the door actuator 3. The force of the closer spring is transferred from the closer spring via a linkage 4 to a sliding element 9. The sliding element 9 is guided in a slide rail 5 of the holding device 1, mounted on the lintel side.

[0052] Furthermore, the locking arrangement 1 comprises a hazard detector 8. This is designed as a smoke detector and / or fire detector. The hazard detector 8 is connected to additional signaling devices 6, in particular additional hazard detectors (see Figure 2), wherein the signal transmitters 6 are mounted in particular on the ceiling. Another component of the locking arrangement 1 is a holding device 7, with which the sliding element 9 can be locked. In this case, the holding device 7 is in the locking state SZ. By locking the sliding element 9, the door 2 can be held in the open position. The holding device 7 is controlled by and within two subsystems 25, the structure and function of which are described below with reference to Figure 2 The holding device 7 is controlled by the subsystems 25 in such a way that the sliding element 9 is held in place, in particular, until the hazard detector 8 sends a trigger signal to the subsystems 25.

[0053] In the event of smoke or fire development, this is detected by the hazard detector 8 and / or by the external signaling devices 6. The external signaling devices 6 are wirelessly linked to the hazard detector 8. The hazard detector 8 generates the trigger signal when a fire or smoke development has been detected. This trigger signal is forwarded to the subsystems 25, causing the holding device 7 to release the sliding element 9, transferring the holding device to the release state GZ. Thus, the energy stored in the closing springs of the door operator 3 can close the door leaves of the door 2.

[0054] Figure 2 shows a schematic diagram of the locking arrangement 1. In the Figure 2In the embodiment shown, two signal transmitters 6 are present, which communicate with the hazard detector 8 via a radio link. The signal transmitters 6 are thus capable of transmitting a signal to the hazard detector 8 when the signal transmitters 6 detect smoke or a fire. The hazard detector 8 is also designed to detect a fire.

[0055] In addition, the locking arrangement 1 has two subsystems 25, with the hazard detector 8 being connected to the subsystems 25. The hazard detector 8 is connected to two control devices 11. The control devices 11 have an identical function. The control devices 11 are, in particular, microcontrollers. The control devices 11 are connected to one another via a data line 20 for data exchange, thus enabling mutual monitoring of the control devices 11. This allows defects within one subsystem 25 to be detected by the other subsystem 25. This provides redundancy within the locking arrangement 1.

[0056] The control devices 11 are configured to control magnetic coils 10. Each subsystem 25 has at least one magnetic coil 10, such that each magnetic coil 10 of a subsystem 25 can be controlled by the control device 11 of the subsystem 25. The magnetic coils 10 are part of a holding device 7, with which an armature 22 can be held in at least two different positions without the need for external energy supply. In particular, the holding device 7 has an electromagnet. The electromagnet holds the armature 22 in a first position until a current pulse at one of the magnetic coils 10 switches the electromagnet and thus transfers the armature 22 to a second position different from the first position. Likewise, the electromagnet holds the armature 22 in the second position until a current pulse at one of the magnetic coils 10 switches the electromagnet and transfers the armature 22 to the first position.In the first position, the sliding element 9 and thus the door are locked; in the second position, the sliding element 9 is released. Energizing an electromagnet is sufficient to move the armature 22 into the positions. Thus, the magnetic coils 10 are redundant to each other.

[0057] Each control device 11 is configured to apply a current pulse to a solenoid 10 to release the door 2. For this purpose, each control device 11 is connected to a respective switch 16, wherein electrical energy is delivered via the switches 16, in accordance with the specifications of the control devices 11, to a solenoid 10 assigned to the switch 16. Current can flow through the solenoid 10 in different directions through the switch 16. By applying electrical energy to the solenoid 10, the sliding element 9 is released. Thus, the locking arrangement 1 is based on a working current principle.

[0058] By using the open-circuit current principle, reliable release must be guaranteed upon receipt of the trigger signal from the hazard detector 8. Therefore, the locking arrangement 1 has at least one measuring point 17 in each subsystem 25, in particular a separate measuring point 17 for each magnetic coil 10. At the measuring point 17, a check is made to determine whether the switching signals assigned to the magnetic coil 10 are being implemented and / or whether there is an interruption in the circuit of the magnetic coil 10. For this purpose, the measuring point 17 of a subsystem 25 is electrically connected to the control device 11 of the subsystem 25. Should a fault in the magnetic coil 10 of the subsystem 25 be detected, for example, an interruption in the circuit of the magnetic coil 10, there is no guarantee that controlling the magnetic coil 10 will release the sliding element 9.However, due to the presence of multiple subsystems 25 within the locking assembly 1, an additional solenoid 10 is provided, so that the door 2 can be released by controlling the additional solenoid 10. A current I 1 can be determined using the measuring point 17. The control unit 11 checks whether the current I 1 lies within a specified value range.

[0059] Furthermore, each subsystem has at least one intermediate energy storage device 15. The electrical energy required to operate the magnetic coils 10 is stored in the intermediate energy storage device 15, with each magnetic coil 10 being assigned an intermediate energy storage device 15. The intermediate energy storage device 15 is electrically connected to the switch 16, so that the electrical energy stored in the intermediate energy storage device 15 can be delivered to the magnetic coil 10 via the switch 16.

[0060] Each subsystem 25 also has at least one voltage converter 14, wherein the energy buffers 15 are charged from a common energy storage unit 12 via the voltage converters 14, in particular each energy buffer 15 via its own voltage converter 14. For the sake of clarity, Figure 2 The energy storage unit 12 is shown in three elements. The energy storage unit 12 is, in particular, a battery or accumulator, or a circuit comprising several batteries or accumulators. Thus, the locking arrangement 1 is independent of an external power supply, for example, a household electrical system.

[0061] Each subsystem 25 has at least a first voltage measuring point 13, wherein the energy storage unit 12 is connected to the control devices 11 via the first voltage measuring point 13. A voltage failure and / or an undervoltage of the energy storage unit 12 is detected by the first voltage measuring point 13. If a voltage value U 1 for the energy storage unit 12 is detected by the first voltage measuring point 13 that is below a predetermined voltage value U V1 and thus does not enable reliable charging of the intermediate energy storage devices 15, one of the control devices 11 subsequently controls the magnetic coil 10 such that the sliding element 9 is released. This prevents the sliding element 9 from being held by the locking arrangement 1, which would prevent release from being possible due to a failure of the energy storage unit 12.

[0062] Furthermore, the locking arrangement 1 advantageously has a display device 18 with which the state of each magnetic coil 10 and / or the energy storage unit 12 can be displayed. For example, the display device 18 can issue a warning if the voltage value U 1 determined by the first voltage measuring point 13 is below a threshold value U s . The threshold value U s is above the predetermined voltage value U V1 . Furthermore, a button 19 is preferably provided.

[0063] For example, if the locking device 1 has transferred the holding device 7 to the release state GZ in the event of a fire, the control devices 11 initially prevent the holding device 7 from being transferred back to the locking state SZ. The button 19 serves to enable the holding device 7 to be transferred back to the locking state SZ.

[0064] Finally, the locking assembly 1 has a position sensor 23 that detects the position of the armature 22. The position sensor 23 is, in particular, a magnetic switch.

[0065] A second voltage measuring point 26 is also provided, which determines electrical voltage values ​​U 2 for the energy buffer 15.

[0066] Capacitors 27 are provided between the energy storage unit 12 and the control devices in order to supply the respective control device 11 with electrical energy in the event of failure of the energy supply unit 12.

[0067] In the Figures 3 to 6 Methods 30, 40, 50, 60 are shown, wherein all methods 30, 40, 50, 60 are implemented in the locking arrangement 1 according to the invention, in particular according to the Figures 1 and 2, are integrated. The methods 30, 40, 50, 60 are preferably stored in the control devices 11. The locking arrangement 1 can be designed, in particular, by means of the control devices 11 to carry out the methods 30, 40, 50, 60.

[0068] In Figure 3 A method 30 is shown in which, in a method step 31, a voltage value U 1 is determined for the power supply unit 12. In a second method step 32, the voltage value U 1 is compared with a predetermined voltage value U V1 stored in the control device 11. If the voltage value U 1 is smaller than the voltage value U V1 , which in Figure 3 is represented by a "+", the holding device 7 is transferred to the releasing state GZ according to method step 33. Without changing the energy storage unit 12, it is not possible to return the holding device 7 to the locking state SZ, even by pressing the button 19.

[0069] If the voltage value U 1 is greater than or equal to the voltage value U V1 , but less than a threshold value U s , which is checked in a method step 34, a warning W is issued in a method step 35. In cases in which the voltage value U 1 is greater than or equal to the voltage value U V1 , the determination of the voltage value U 1 and the subsequent routine are repeated at regular first time intervals Δt 1 .

[0070] In Figure 4a method 40 is shown in which the magnetic coil 10 is to be energized for test purposes. For this purpose, the position of the armature 22 must first be determined in a method step 41 by the position sensor 23 and thereby it must be established whether the holding device 7 is in the locking state SZ or in the releasing state GZ. Accordingly, in a method step 42 in a test T, the magnetic coil 10 is energized by the switch 16 in such a way that the current flowing through the magnetic coil 10 has no effect on the state of the holding device 7. The test T is carried out for a predetermined discharge period Δt 2. During the test T, the current intensity I 1 is measured at the measuring point 17 in a method step 43. The control unit 11 checks in a method step 44 whether the current intensity I 1 is in a value range I 0 , I 2 with I 0 < I 1 < I 2 . If this is not the case, which is Figure 4is marked with a "-", the holding device 7 is transferred to the releasing state GZ, which corresponds to method step 45.

[0071] Likewise, the voltage value U 2 determined at the second voltage measuring point 26 before and after the discharge period Δt 2 of the test T is determined and from this, in a method step 46, a voltage value difference, ie a voltage drop ΔU 2 , is calculated. Subsequently, in a method step 47, it is checked whether the voltage drop ΔU 2 is greater than a maximum value ΔU V . If this is the case, which is Figure 4 is marked with a "+", the holding device 7 is transferred to the releasing state GZ according to method step 45. This prevents the holding device 7 from having to be transferred to the releasing state GZ in the event of a fire in the case of an energy buffer 15 that is aged and can only store a small amount of electrical energy.

[0072] If the current I 1 is in a range of values ​​I 0 , I 2 , which in Figure 4 is represented by a "+" and the voltage drop ΔU 2 is smaller than a maximum value ΔU V , the process 40 is simply started again in a second predetermined time interval Δt 3 .

[0073] In Figure 5 A further method 50 is shown. In order to have sufficient electrical energy available in the energy buffer 15, according to method step 51, the energy buffer 15 is determined at predetermined third time intervals Δt 5 within a voltage value U 2 for the energy buffer 15. In a method step 52, it is checked whether the determined voltage value U 2 falls below a target voltage value U V2 by a predetermined amount B. If this is the case, which is Figure 5is marked with a "+", an attempt is made to recharge the energy buffer 15 according to method step 53. If this is not the case, which is indicated in Figure 5 is marked by a "-", a new determination of U 2 is carried out in the predetermined third time interval Δt 5 . In the case of charging, a method step 54 checks whether time t (U 2 =U V2 ) for charging the energy buffer 15 to the target voltage value U V2 takes place within a predetermined charging time period Δt 4 . The charging time period Δt 4 has both an upper and a lower limit in the range of seconds. This means that the charging can be too slow, e.g. because the voltage converter 14 is defective, or too fast, e.g. because the energy buffer 15 has too low a capacity. If the charging does not take place within the charging time period Δt 4 , which in Figure 5is marked with "-", the holding device 7 is transferred to the releasing state GZ in a method step 55. Otherwise, the routine is repeated at the specified third time intervals Δt 5 .

[0074] In Figure 6 A method 60 is shown in which the control devices 11 monitor each other according to method step 61 and each monitor themselves according to the respective method step 62. In this case, in method step 61, it is also checked whether the control devices 11 are leaving an energy-saving mode.

[0075] If a defect in one of the control devices 11 is detected in the method steps 61, 62, which in Figure 6is represented by a "-", the holding device 7 is transferred into the releasing state GZ by the other control device 11 according to method step 63. If no defect is detected, method step 61 is repeated at monitoring time intervals Δt 6 and method step 62 is repeated at self-monitoring time intervals Δt 7. List of reference symbols

[0076] 1Holding arrangement 2Door 3Door operator 4Linkage 5Sliding rail 6Signal generator 7Holding device 8Hazard detector 9Sliding element 10Solenoid coil 11Control device 12Energy storage unit 13First voltage measuring point 14Voltage transformer 15Energy buffer 16Switch 17Current measuring point 18Display device 19Button 20Data line 22Armature 23Position sensor 25Subsystem 26Second voltage measuring point 27Capacitor SZDetecting state GZReleasing state U 1 at 13 measured voltage value for 12 U V1 specified voltage value US threshold value U 2 measured voltage value for 15 U V2 setpoint voltage value BBamount tTime to reach the setpoint voltage value I 1 measured current I 0 , I 2 limits of the value range WWarning TTest ΔU 2 voltage drop for 15 ΔU V maximum value Δt 1 first specified time interval Δt 2 specified discharge time interval Δt 3 second specified time interval Δt 4 specified charging time interval Δt 5 third specified time interval Δt 6 monitoring time intervals Δt 7 self-monitoring time intervals 30Procedures 31-35Procedure steps 40Procedures 41-45Procedure steps 50Procedure steps 51-55Procedure steps 60Procedures 61-63Procedure steps

Claims

1. A hold-open arrangement (1) for a door, with a retaining device (7) for holding the door open, in particular in an open location, a control device (11) for controlling the retaining device (7) and an energy accumulating unit (12), wherein, while supplying electrical energy, the retaining device (7) is transferable from a hold-open condition (SZ) into a releasing condition (GZ), wherein the hold-open arrangement (1) is configured to transfer the retaining device (7) from the hold-open condition (SZ) into the releasing condition (GZ), if a defect in the intended supply with electric power of the retaining device (7) arises and wherein the hold-open arrangement (1) is configured to transfer the retaining device (7) from the hold-open condition (SZ) into the releasing condition (GZ), if a specified voltage value (UV1) for the energy accumulating unit (12) falls short, which serves for supplying electrical energy for the retaining device (7), wherein a first voltage measuring location (13) for determining a voltage value (U1) characterizing the electrical voltage of the energy accumulating unit (12) is provided, wherein, for a voltage value (U1) determined by the voltage measuring location (13) to be below the specified voltage value (UV1), the retaining device (7) is transferred into the releasing condition, characterized in that the hold-open arrangement (1) includes at least one auxiliary energy accumulator (15), in which at least an electrical energy quantity is storable, by means of which the retaining device (7) is transferable from the hold-open condition (SZ) into the releasing condition (GZ), such that also during a defect of the energy accumulating unit (12) or of an electrical connection line of the energy accumulating unit (12), the retaining device (7) may be transferred into the releasing condition at least one more time, wherein a second voltage measuring location (26) may be provided for determining a voltage value (U2) characterizing the electrical voltage of the intermediate energy accumulator (15), and wherein a defect in the intended supply with electric current to the retaining device (7) is given, if a recharging of the intermediate energy accumulator (15) to a nominal voltage value (Uv2) fails within a specified charging time period (Δt4).

2. The hold-open arrangement (1) for a door, with a retaining device (7) for holding the door open, in particular in an open location, a control device (11) for controlling the hold-open device (7) and an energy accumulating unit (12), wherein, while supplying electrical energy, the retaining device (7) is transferable from a hold-open condition (SZ) into a releasing condition (GZ), wherein the hold-open arrangement (1) is configured to transfer the retaining device (7) from the hold-open condition (SZ) into the releasing condition (GZ), if a defect in the intended supply with electric power to the retaining device (7) arises and wherein the hold-open arrangement (1) is configured to transfer the retaining device (7) from the hold-open condition (SZ) into the releasing condition (GZ) if a specified voltage value (UV1) for the energy accumulating unit (12) falls short, which serves for supplying electrical energy for the retaining device (7), wherein a first voltage measuring location (13) for determining a voltage value (U1) characterizing the electrical voltage of the energy accumulating unit (12) is provided, wherein, for a voltage value (U1) determined by the voltage measuring location (13) to be below the specified voltage value (UV1), the retaining device (7) is transferred into the releasing condition, characterized in that the hold-open arrangement (1) includes at least one intermediate energy accumulator (15), in which at least an electrical energy quantity is storable, by means of which the retaining device (7) is transferable from the hold-open condition (SZ) into the releasing condition (GZ), such that also during a defect of the energy accumulating unit (12) or of an electrical connection line of the energy accumulating unit (12), the retaining device (7) may be transferred into the releasing condition at least one more time, wherein a second voltage measuring location (26) is provided for determining a voltage value (U2) characterizing the electrical voltage of the intermediate energy accumulator (15) and wherein a defect in the intended supply with electrical current to the retaining device (7) is given, if a voltage drop (ΔU2) determined at the second voltage measuring location during a discharge of the intermediate energy accumulator (15) for a specified discharge time period (Δt2) is larger than a specified maximum value (ΔUv).

3. The hold-open arrangement (1) according to claim 1 or 2, characterized in that the energy accumulating unit (12) includes at least one electrochemical energy accumulator, wherein the electrochemical energy accumulator has a ratio V1 of the nominal voltage to a recommended maximum permanent current of 10 Ω ≤ V1 ≤ 40 Ω, preferably of 15 Ω ≤ V1 ≤ 30 Ω and / or a ratio V2 of the nominal voltage to a maximum pulsed discharge current of 20 Ω ≤ V2 ≤ 100 Ω, preferably of 30 Ω ≤ V2 ≤ 70 Ω, and / or a fuse is provided in the energy accumulating unit (12).

4. The hold-open arrangement (1) according to any of the preceding claims, characterized in that retaining device (7) includes an electric flow through component (10), in particular a magnetic coil, wherein the hold-open arrangement (1) includes a measuring location (17) for determining an electric amperage (I1), which flows through the electric flow through component (10), wherein a defect in a provided supply with electric current to the retaining device (7) is given, if the measured amperage (I1) is outside a specified value range (I0, I2).

5. The hold-open arrangement (1) according to any of the preceding claims, characterized in that it includes at least two intermediate energy accumulators (15) redundant with regard to each other and / or at least two electrical flow through components (10).

6. The hold-open arrangement (1) according to any of the preceding claims, characterized in that the hold-open arrangement (1) includes at least two control devices (11), which mutually monitor each other, wherein a defect in the intended supply with electrical current to the retaining device (7) is given, if one control device (11) is defective.

7. The hold-open arrangement (1) according to any of the preceding claims, characterized in that a defect in the intended supply with electrical current to the retaining device (7) is given, if the control device (1) fails to leave an energy savings mode.

8. The hold-open arrangement (1) according to any of the preceding claims, characterized in that a button (19) is provided, in order for allowing, after a transfer into the releasing condition (GZ), in particular after a reception of a trigger signal of a hazard detector and / or or a change of the energy accumulating unit (12), for a re-arrangement of the retaining device (7) in the hold-open condition (SZ).

9. The hold-open arrangement (1) according to any of the preceding claims, characterized in that after the specified voltage value (UV1) falls short and / or exceeds the specified maximum value (ΔUV) the retaining device (7) remains in the releasing condition (GZ), wherein in particular upon actuation of the button (19) a transfer into the hold-open condition (SZ) is prevented.

10. A method (30, 40, 50, 60) for operating a hold-open arrangement (1) according to any of the claims 1 to 9, wherein the hold-open arrangement comprises the retaining device (7) for holding open a door (2), in particular in an open location, wherein the retaining device (7) is transferred from a hold-open condition (SZ) into a releasing condition (GZ) by supplying electrical energy, characterized in that the retaining device (7) is transferred from the hold-open condition (SZ) into the releasing condition (GZ), if a defect in the intended supply with electric power to the retaining device (7) arises and / or a specified voltage value (UV1) for the energy accumulating unit (12) falls short, which serves for supplying electrical energy to the retaining device (7).

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