EP2714569B1 - Lift shaft cover with a lift control arrangement - Google Patents

Description

The invention relates to the door frame of a lift shaft conclusion, wherein in a chamber of the door frame an elevator control arrangement is arranged.

The EP 1 518 815 A1 discloses an elevator shaft termination of a building having a door frame mounted in the building and having movable doors. The elevator shaft closure separates an elevator shaft of the building from a floor of the building, wherein a lift control arrangement is arranged in a chamber of the door frame. The arrangement of the elevator control arrangement within the door frame is made possible inter alia by the fact that the elevator control arrangement can be made smaller today and the power consumption and the resulting waste heat could be reduced and thus, for example, no space-consuming ventilation systems are required. An elevator control arrangement comprises as in EP 1 518 815 A1 discloses an elevator control unit and means for mounting and protecting the elevator control unit. The elevator control assembly is therefore as a whole component with a few simple steps in an elevator system and expandable.

The elevator control unit essentially comprises assemblies which are required for the control and / or regulation of the elevator installation. Furthermore, such an elevator control unit can contain the necessary interfaces and input modules for the service of the elevator installation and the diagnostics and can have a power supply unit for the voltage supply.

Türzargenelemente of elevator systems should not dominate because of their dimensions and therefore have very small cross-sections. In existing elevator systems, the dimensions of the cross-section are rarely more than 0.1m x 0.15m.

To operate an elevator motor power electronics is also required, which is usually arranged in the elevator shaft. The elevator motor also arranged in the elevator shaft is connected via the power electronics to the power grid and is driven by control signals of the elevator control unit.

The object of the present invention is to provide a door frame with an elevator control arrangement, which is easy to maintain and to control and which requires a low installation cost and material costs.

This object is achieved by a door frame with the features of the independent claim 1, or by the features of an elevator shaft closure according to claim 15 and by the features of an elevator system according to claim 16.

Preferred developments of the door frame, in which an elevator control arrangement according to the invention is arranged, are defined by the respective dependent claims.

A door frame of a lift shaft closure has a chamber in which an elevator control arrangement is arranged. The elevator shaft closure separates a lift shaft of a building from one floor of the building. According to the invention, the elevator control arrangement includes an elevator control unit and at least one power electronics unit which can be connected to an elevator motor.

The formation of the chamber or its very limited volume depends on the choice of profile cross-sections, which have the Türzargenelemente. If the door frame is formed from tubular profiles, the chamber is arranged in the interior of the Türzargenprofils. If the door frame is formed from angle sections and / or U-profiles, a side wall of the chamber may also be formed by the masonry of the building. To facilitate the maintenance, the elevator control arrangement is usually installed in a vertical Türzargenelement or in the door jamb.

In elevator systems, the drive is often arranged in the elevator shaft itself. Most often, in such elevator systems, the elevator control assembly is located in an area of an elevator shaft termination, while the power electronics unit, which is usually part of a frequency converter, is located in the elevator shaft near the drive. This is because power electronic units significantly waste heat produce. Furthermore, their electrical and / or magnetic fields or electrical and / or magnetic waves can sensitively disturb the elevator control unit.

Due to the arrangement of the power electronics unit in the elevator shaft, however, their maintenance is made considerably more difficult in comparison with the maintenance of the elevator control unit. Furthermore, this arrangement results in a considerable cost of materials, since the elevator control unit requires its own power supply. The installation effort is also significant by this arrangement, as much more cables between the elevator control system, the power electronics and the elevator motor must be laid.

The power electronics unit for operating an elevator motor is preferably part of an electronic frequency converter. In principle, the electronic (static) frequency converter consists of a rectifier, which feeds a DC or DC intermediate circuit, and an inverter fed from this intermediate circuit as well as other electronic components, for example for controlling the inverter. The DC link consists of a capacitor for smoothing the DC voltage and an inductance for suppression. As a rectifier both uncontrolled and controlled bridges are used. The supply of the DC link can also be done with an active power factor correction (PFC) when using a controlled bridge. The inverter works exclusively with power electronic switches (controlled bridges). These may include transistors such as Metal Oxide Semiconductor Field Effect Transistors (MOSFETs), Insulated Gate Bipolar Transistors (IGBTs), or Integrated Gate Commutated Thyristors (IGCTs). The amount of the resulting output voltage and also its frequency can be controlled within wide limits. To be able to brake, simple frequency inverters have a so-called brake chopper, which conducts the excess energy from the DC link into a braking resistor and converts it into heat. Otherwise, the intermediate circuit voltage would rise and destroy the capacitors. However, there are also more complex, regenerative frequency converters that can feed the recorded regenerative braking power back into the power grid. Furthermore, there are cycloconverters (so-called matrix converters) in which each power supply phase can be connected directly to each phase of the load via semiconductor switches. The DC link with the same size is thus eliminated. However, a direct director with thyristors can only produce output frequencies smaller than the input frequency. DC link inverters and direct converters with IGBTs, on the other hand, can also generate output frequencies that are above the input frequency. Direct converters are also capable of regenerative feedback. Frequency converters generate strong electrical interference signals on the motor supply line, which not only can disturb other loads, but also lead to an increased insulation load in the motor. The motor supply line must often be screened to avoid noise emissions. A so-called sine-wave filter between inverter and motor can also remedy this situation. Such sine-wave filters differ from a line filter in their lower cut-off frequency and higher load capacity.

If the frequency converter is able to transfer energy from the DC link to the motor in both directions of rotation and also back into the DC link during braking, this is called four-quadrant operation. Since the intermediate circuit due to its structure can only store a certain energy nondestructively, measures must be taken to reduce the stored energy. A variant that is usually used in low-cost frequency converters is the conversion of electrical energy into thermal energy with the so-called "brake chopper", a braking resistor which is connected by an electronic switch. For larger amounts of energy, however, this method is not desirable for ecological as well as economic reasons. There are regenerative converters for these applications. You can transfer the energy from the DC link back to the power grid. All types of motors with regenerative frequency converters can thus be operated as a generator even at varying speeds. This is particularly interesting for drives of elevators, escalators and moving walks.

The inventive integration of the power electronics unit in the elevator control arrangement overcomes the prejudice that the heat development of the power electronics unit and their emission of interference influences are too large to be arranged with the elevator control unit in a confined space in the chamber of the door frame. Since the waste heat is dissipated in the elevator shaft and the units are cleverly arranged in the elevator control arrangement using the surrounding components, integration is possible.

The advantages of integrating the power electronics unit in the elevator control system are manifold. First, the cost is significantly reduced, since only a wiring of the engine with the elevator control system and the elevator control system must be connected to the electrical grid. Furthermore, no separate power supply line between the elevator control arrangement and the power grid is necessary because the power supply of the elevator control system feeds the elevator control unit and the power electronics unit. Secondly, already at the end of the factory assembly of the elevator control arrangement, the elevator control unit and the power electronics unit can be matched and adjusted to one another. Furthermore, the entire elevator control arrangement can be tested in the factory. As a result, complicated setting work is unnecessary during assembly, repair or maintenance of the elevator installation. With a few simple steps, the entire elevator control arrangement and thus according to the invention the elevator control unit and the power electronics unit can be replaced.

The elevator control arrangement is preferably also accessible from the elevator shaft. In order to achieve this, the door frame in the region of the chamber may include an opening directed against the elevator shaft. The elevator control arrangement has a main carrier on which the elevator control unit and the power electronics unit are arranged. When installed, the opening is closed by the main beam. The opening must be closed, so that no fire gases can penetrate and in case of fire, the fire does not spread over the elevator shaft and the opening in the door frame in the floors.

So that the elevator control arrangement does not overheat in this spatially narrow chamber of the door frame and this does not lead to malfunction of the elevator control unit, for faster aging or even destruction of the electronic components, at least the waste heat of the power electronics unit must be removed from the chamber. This can not be done on the door itself, as this would heat otherwise. By dissipating the waste heat in the elevator shaft, the door frame approximately at room temperature and the user is not disturbed by a heated door frame. Of course, the waste heat of the elevator control unit in the elevator shaft can be removed.

Preferably, the chamber has electrically conductive chamber walls which are part of the mutual shielding of electrical and / or magnetic fields and electrical and / or magnetic waves of the elevator control unit and the power electronics unit. If the door frame is made of an electrically conductive tube profile, this is already given. Optionally, in the chamber shielding plates must be arranged when one side of the chamber is limited by the masonry of the building.

In order to dissipate the waste heat of the power electronics unit in the elevator shaft, the main carrier has a cooling air duct formed by walls, wherein the cooling air duct connects a suction opening formed on the main carrier with an outlet opening formed on the main carrier. According to the invention, the suction opening and outlet opening of the main carrier are directed to the elevator shaft in the installed state. On the walls of the cooling air shaft, the elevator control unit and the power electronics unit are further arranged. At least one wall of the cooling air shaft is electrically conductive and is therefore part of the mutual shielding of the elevator control unit and the power electronics unit of electric and / or magnetic fields and electric and / or magnetic waves that emanate from these units, in particular from the power electronics unit in operation. In most cases, parts that serve the shield, electrically connected to ground, so that even electrostatic charges can be dissipated.

The feature "arranged on the wall" means that the unit is arranged in the immediate vicinity of the wall. The power electronics unit and the elevator control unit therefore do not necessarily rest on the wall surface. They can be connected by means of spacers to the wall or, for example, be held by a mounting bracket attached to the main carrier at a defined distance parallel to the wall.

• ein Netzteil (Transformator mit Gleichrichter) zur Versorgung der Aufzugkontrolleinheit,
• ein Netzteil zur Versorgung von Batterien,
• eine weitere Leistungselektronikeinheit, beispielsweise zur Rückspeisung der vom Aufzugsmotor erzeugten elektrischen Energie in ein Stromnetz.

In one development of the invention, at least one of the following units generating waste heat can be arranged on the walls of the cooling air shaft:

• a power supply (transformer with rectifier) to supply the elevator control unit,
• a power supply for supplying batteries,
• another power electronics unit, for example, for feeding back the electrical energy generated by the elevator motor in a power grid.

Of course, the second power electronics is only necessary if the first power electronics is not regenerative or their recuperated electrical energy is used to charge batteries. The braking energy of the elevator motor is thus not easily converted by means of heating resistors into heat, but used. All the units listed above also generate considerable waste heat in the narrow chamber, so that their waste heat must be dissipated through the cooling air shaft in the elevator shaft. Further, at least one wall of the cooling duct is electrically conductive and is part of the mutual shielding of the elevator control unit and the heat-generating units with each other. Part of the mutual shielding means that the conductive wall of the cooling air duct contributes to the shielding of the electromagnetic interference influences of the respective other units, but does not necessarily accomplish them completely. By a clever arrangement of the elevator control unit and the power electronics units on the walls, but also a complete shielding through the walls of the cooling air duct can be achieved. By "unit" is not necessarily meant a physical unit, for example, a power electronics unit, a power supply or the elevator control unit may also comprise a plurality of interconnected interconnecting and equipped with electronic components printed circuit boards. The term "unit" thus refers to the function of a component or a group of components.

One way to use the walls of the cooling duct efficiently for shielding is that at least one step is formed on at least one wall of the cooling duct. At one stage only the elevator control unit or only one power electronics unit is arranged. By grading the wall or walls, portions of the ventilation duct protrude between the units thereby forming part of the shielding. The number of additional shielding covers, shielding plates and screening hoods can thereby be minimized, as well as possible gaps and holes in the shield, which reduce their shielding capacity.

In order to efficiently introduce the waste heat of the power electronics unit, and / or the elevator control unit in the cooling air duct and deliver there to the cooling air flowing through openings may be arranged in the walls. Through these breakthroughs The heat sinks of components of the power electronics unit and / or the elevator control unit extend into the cooling air shaft. In order to complicate the passage of combustion gases already mentioned above, the openings through the circuit boards of the power electronics unit and / or the elevator control unit can be sealed gas-tight.

In order to optimally utilize the removal of the waste heat through the cooling air shaft, at least one power electronics unit can be arranged in the cooling air shaft. Furthermore, the elevator control unit can be arranged on a side of a wall facing away from the cooling air duct, the electrically conductive wall being arranged between the at least one power electronics unit and the elevator control unit. As a result, the cooling air shaft completely shields the elevator control unit from the interference effects of the electronic power unit.

Of course, the power electronics unit and / or the elevator control unit may be covered by an electrically conductive shielding cover, a shielding hood or a plurality of shielding plates, so that they are completely enclosed with electrically conductive parts. An exception may be the projecting into the cooling air duct heat sink, which should be in order to optimize heat dissipation with the cooling air flow in touch. Of course, the electrically conductive walls can be made of sheet steel, aluminum or a soft magnetic nickel-iron alloy of high magnetic permeability or coated with these materials.

Preferably, the walls have a high thermal conductivity. Then, these may themselves serve as heat sinks when connected to the heat generating electronic components of the power electronics unit and / or the elevator control unit. Optionally, can be dispensed with additional heat sink and the necessary openings in the walls. Since the walls of such a cooling air shaft are heated, cooling fins are preferably arranged in the interior of the cooling air shaft through which air flows.

If the cooling air duct has a vertical orientation, can be set by the heat input of the power electronics unit a chimney effect through which the cooling air flows through without further means by itself. The at the outlet and intake passing elevator car but can significantly affect this automatic cooling air flow and possibly bring to a standstill. To ensure the cooling permanently, therefore, a fan is preferably arranged in the cooling air shaft.

Since the dissipated waste heat of the power electronics unit depends on the power consumption or the power output of the elevator motor, preferably also varies the applied cooling capacity of the cooling air duct and the blower. To reduce the noise, therefore, two blowers can be arranged in parallel in the cooling air shaft, depending on the dissipated heat, a fan or both fans are in operation. Further, the cooling air duct can also be divided into, for example, two channels, so that the first fan presses the cooling air through the first channel and the second fan presses the cooling air through the second channel. Such a division may be useful if, for example, two power electronics units are integrated in the elevator control arrangement.

Furthermore, a temperature sensor can be arranged in the power electronics unit and / or in the elevator control unit, the signals of the temperature sensor serving to control and regulate the blower or the fans.

As stated above, a passing elevator car can significantly affect the cooling air flow in the cooling duct, even if a fan is present. In order to prevent backflow of the cooling air, the intake opening and the outlet opening may comprise flow baffles which, for the purpose of supporting the cooling air flow in the cooling air shaft, align with the direction of travel of an elevator car traveling in the elevator shaft. As a result of the alignment of the flow baffles, as the elevator car passes by, the air from the elevator shaft is always pressed in to the suction opening or sucked out of the outlet opening.

An elevator shaft termination of a building has, as stated above, a door frame fastened in the building with a chamber in which the elevator control arrangement with a frequency converter integrated according to the invention is arranged. On the door frame also movable doors are guided, which also belong to the elevator shaft closure. An elevator installation of a building has at least one elevator shaft termination with the elevator control arrangement according to the invention.

Figur 1:

einen Aufzugschachtabschluss in dreidimensionalrer Ansicht mit einer Türzarge und einer erfindungsgemäßen Aufzugkontrollanordnung, angeordnet in einer Kammer der Türzarge;

Figur 2:

Türpfostenteile der Türzarge aus Figur 1 in dreidimensionaler Explosionsdarstellung, die die Kammer bilden sowie die erfindungsgemäße Aufzugkontrollanordnung;

Figur 3:

die Türzarge in dreidimensionaler Ansicht mit Blickrichtung vom Aufzugschacht auf das Stockwerk, deren Türpfosten die in der Figur 2 gezeigten Türpfostenteile und die Aufzugkontrollanordnung beinhaltet;

Figur 4:

in geschnittenem Aufriss eine in der Kammer der Türzarge eingebaute Aufzugkontrollanordnung in einer ersten Ausführung ohne Gebläse;

Figur 5:

in geschnittenem Aufriss eine in der Kammer der Türzarge eingebaute Aufzugkontrollanordnung in einer zweiten Ausführung mit einem Gebläse und mit Temperatursensoren zur Regelung des Gebläses;

Figur 6:

in geschnittenem Aufriss eine in der Kammer der Türzarge eingebaute Aufzugkontrollanordnung in einer dritten Ausführung mit Strömungsleitblechen im Aufzugschacht;

Figur 7:

in geschnittenem Aufriss eine in der Kammer der Türzarge eingebaute Aufzugkontrollanordnung in einer vierten Ausführung mit zwei Gebläsen und mit einem in zwei Kanäle unterteilten Kühlluftschacht.

The elevator shaft according to the invention or its door frame according to the invention is explained in more detail below with reference to examples and with reference to the drawings. Show:

FIG. 1:

a lift shaft closure in three-dimensional view with a door frame and a lift control arrangement according to the invention, arranged in a chamber of the door frame;

FIG. 2:

Door post parts of the door frame FIG. 1 in a three-dimensional exploded view, which form the chamber and the elevator control arrangement according to the invention;

FIG. 3:

the door frame in three-dimensional view looking from the elevator shaft on the floor, the door jamb in the FIG. 2 shown door jamb parts and the elevator control arrangement includes;

FIG. 4:

a cutaway elevation built in the chamber of the door frame elevator control arrangement in a first embodiment without fan;

FIG. 5:

in a sectional elevation a built in the chamber of the door frame elevator control arrangement in a second embodiment with a fan and with temperature sensors for controlling the fan;

FIG. 6:

in a sectional elevation a built in the chamber of the door frame elevator control arrangement in a third embodiment with flow baffles in the elevator shaft;

FIG. 7:

in a cutaway elevation built into the chamber of the door frame elevator control assembly in a fourth embodiment with two fans and with a divided into two channels cooling air duct.

In FIG. 1 an elevator shaft end 1 of an elevator installation is shown as it can be perceived by a user of the elevator installation on a floor 9. A not further illustrated building in which the elevator system is located, has a building wall 10 which limits an indicated by broken lines elevator shaft 11.

The elevator shaft 11 is separated from the floor 9 by the elevator shaft termination 1. The elevator shaft end has a shaft door, which consists essentially of two door leaves 12.1, 12.2 and a door frame 14. The door leaves 12.1, 12.2 are horizontally displaceable, in the direction of an axis X of an in FIG. 1 The door frame 14 has three Türzargenelemente, namely two lateral, vertical Türzargenelemente 14.1, 14.2, the door jambs and are directed parallel to the axis Z, and by an upper, horizontal Türzargenelement 14.3, which is directed parallel to the axis X.

By the vertical Türzargenelement 14.1 a chamber 16 is formed in the interior. The vertical door frame element 14.1 has a plurality of post walls, in particular an outer frontal post wall 16.1 and an outer lateral post wall 16.3. In the present embodiment, the outer frontal post wall 16.1 is parallel to a plane formed by the X and Z axes, and the outer lateral post wall 16.3 is parallel to a plane formed by the Y and Z axes. The outer frontal post wall 16.1 and the outer lateral post wall 16.3 face the floor 9. To the outer post walls 16.1 and 16.3 still inner post walls may be present, which in connection with the Figures 2 and 3 be explained in more detail.

The outer lateral post wall 16.3 has an outer opening, which allows access to the chamber 16. This outer opening may be of any suitable size, in particular it may extend over most of the lateral post wall 16.3 as shown in FIG FIG. 1 is indicated. Of course, the outer opening may also be formed in the outer frontal post wall 16.1.

The outer opening can be closed by a cover 17. If the elevator installation is ready for operation or in operation, the cover 17 is mounted in its operating position in which it closes the outer opening. If the elevator installation is in service, the cover 17 is in its service position, whereby it is completely dismantled, that is to say without contact with the door frame element 14.1. Alternatively, the cover 17 may also be fastened by means of a hinge on the Türzargenelement 14.1. The lid 17 is preferably recessed with its outer surface flush in the outer opening, whereby it is mounted virtually vandal-proof and offers an aesthetically pleasing sight.

The outer frontal post wall 16.1 contains a breakthrough in which a floor panel 31 is mounted, wherein preferably on all floors of the elevator installation the same floor panel 31 can be used. Of course, the floor panel 31 may also be embedded in the lid 17. The floor panel 31 may include simple up / down selection keys, a destination call control, user identification readers, a touch screen with a graphical user interface, and the like.

FIG. 2 shows door jamb parts of the door frame 14 from the FIG. 1 in a three-dimensional exploded view. The already in the FIG. 1 described features have the same reference numerals. In the FIG. 2 the viewing direction is not directed from the floor 9, but from the elevator shaft 11 on the door jamb. The outer frontal post wall 16.1 is therefore visible from the rear. Likewise, the floor panel 31 is recognizable from behind. With the outer frontal post wall 16. 1, the outer lateral post wall 16. 3 is connected and its outer opening 15 is closed with the cover 17. The outer frontal post wall 16.1 is formed by bending an inner lateral post wall 16.4. This inner side post wall 16.4 is directed against the masonry of the building wall 10 when the door frame 14 as in FIG. 1 shown, is embedded in the wall opening of the building wall 10. Due to this construction, by which the door frame 14 in the region of the door jamb has a U-shaped cross-section, the chamber 16 includes a directed against the elevator shaft 11 opening. This opening, or the chamber 16 formed by the door jamb parts 16.1, 16.3 and 16.4, is closed by a main support 16.2 of an elevator control arrangement 18. At the main support 16.2 all other parts of the elevator control assembly 18 are arranged such that they are in the installed state within the chamber 16. If the elevator control assembly 18 has to be replaced, it can be completely removed from the side of the elevator shaft 11 by releasing the main carrier 16.2 from the post walls 16.1, 16.3 and 16.4. For this purpose, the elevator car, not shown, can be moved to a suitable height between two floors 9, so that an operator on the roof of the elevator car or on a work surface of the elevator car standing or crouching can perform the necessary work.

• den Hauptträger 16.2,
• eine am Hauptträger 16.2 befestigte Aufzugsteuerungseinheit 20, eine am Hauptträger 16.2 befestigte Leistungselektronikeinheit 21 zum Betrieb eines Aufzugsmotors (Speisung und gegebenenfalls Rückspeisung),
• eine optionale zweite Leistungselektronik zur Rückspeisung der vom Aufzugsmotor erzeugten elektrischen Energie,
• ein Netzteil 18.4 zur Versorgung der Aufzugsteuerungseinheit 20 und/oder Batterien 18.8,
• Mittel zur Kühlung der Abwärme erzeugenden Einheiten 20, 21, wobei die Abwärme in den Aufzugschacht 11 abgeführt wird,
• optional ein oder mehrere Schaltelemente 18.3, beispielsweise einen Schaltschütz,
• Befestigungsmittel zum Einbau des Hauptträgers 16.2 in der Kammer 16,
• Kabel zur Stromversorgung und zum Erstellen der Verbindungen zu Stockwerktableaus und zum Verbinden mit dem Aufzugsmotor,
• eine optionale elektrische oder elektromagnetische Überwachung des Deckels 17
• sowie eine optionale Beleuchtung der Kammer 16,
• Abschirmungsmittel wie Abschirmungsdeckel, Abschirmungsbleche oder Abschirmungshaub en,
• Geräte, die für eine Notevakuierung verwendet werden, beispielsweise Batterien 18.8.

The control arrangement 18 essentially comprises the following components:

• the main carrier 16.2,
• an elevator control unit 20 fastened to the main carrier 16.2, a power electronic unit 21 attached to the main carrier 16.2 for operating an elevator motor (feeding and optionally regenerating),
• an optional second power electronics for feeding back the electrical energy generated by the elevator motor,
• a power supply 18.4 for supplying the elevator control unit 20 and / or batteries 18.8,
• Means for cooling the waste heat generating units 20, 21, wherein the waste heat is discharged into the elevator shaft 11,
• optionally one or more switching elements 18.3, for example a contactor,
• Fastening means for installing the main carrier 16.2 in the chamber 16,
• Cables for supplying power and establishing connections to floor panels and for connecting to the elevator motor,
• an optional electrical or electromagnetic monitoring of the lid 17
• and optional illumination of the chamber 16,
• Shielding means, such as shielding covers, shielding plates or shielding hoods,
• Devices used for emergency evacuation, such as batteries 18.8.

• Hard- und Software der Aufzugsteuerung (zum Beispiel ein Hauptrechner mit Logikelementen und Schnittstellen),
• Telealarmsystem und/oder Intercom (zum Beispiel um einen Service- oder Notruf absetzen zu können)

In an advantageous embodiment, the elevator control unit 20 comprises the following elements:

• Hardware and software of the elevator control (for example a main computer with logic elements and interfaces),
• Telealarmsystem and / or Intercom (for example, to be able to make a service or emergency call)

To dissipate the waste heat in the elevator shaft 11 various means can be used. For example, by a clever selection and arrangement of the units 20, 21, the waste heat to be transferred to the main carrier 16.2, which in turn emits the waste heat to the air in the elevator shaft 11. Should the cooling capacity of the Hauptträger 16.2 is not enough, the one in the FIG. 2 main carrier shown on a suction port 16.5 and 16.6 outlet opening. These are interconnected by a cooling air duct 19. The cooling air duct 19 is in FIG. 2 barely visible, because on the walls of the waste heat generating units elevator control unit 20, power electronics unit 21, and switching element 18.3 are arranged.

FIG. 3 shows the door frame 14 in three-dimensional view with a view from the elevator shaft 11 on the floor 9. The door jamb of the door frame 14 includes in the FIG. 2 To keep track of the appearance of the door was omitted, which separate the floor 9 from the elevator shaft 11 when no car is in the area of the elevator shaft conclusion. In the FIG. 3 the arrangement of the suction port 16.5 and the outlet opening 16.6 in the main support 16.2 one above the other clearly visible. As a result of this arrangement, an air flow caused by the chimney effect can be set in the non-visible cooling air shaft.

In FIG. 4 is a sectional elevation of a built in the chamber 16 of the door frame 14 elevator control assembly 18 shown in a first embodiment. On the main support 16.2 of the elevator control arrangement 18, a suction opening 16.5 and an outlet opening 16.6 are formed. On the side of the main carrier 16.2 facing the chamber 16, a cooling air duct 19 is formed by means of walls 19.1, 19.2, 19.3, which connects the suction opening 16.5 with the outlet opening 16.6. The first wall 19.2, which is arranged parallel to the main support 16.2, has a stepped design, wherein an elevator control unit 20 is arranged on the first step 19.4 and a power electronics unit 21 is arranged on the second step 19.5. Within the cooling air duct 19, a power supply 18.4 is also arranged. The elevator control unit 20 and the power electronics unit 21 have printed circuit boards 20.2, 21.2, on which the individual electronic components are arranged. Some of these electronic components have heat sinks 20.1, 21.1, which extend through openings 19.7, 19.8 in the first wall 19.2 in the cooling air duct 19. The printed circuit boards 20.2, 21.2 completely cover the apertures 19.7, 19.8, so that the cooling air duct 19 is separated from the chamber 16 in a gastight manner.

Since the main carrier 16.2 and the walls 19.1, 19.2, 19.3 of the cooling air shaft 19 for the purpose of shielding the elevator control unit 20 and the power electronics unit 21 from Metal are made, if necessary, their printed circuit boards 20.2, 20.3 spaced from the main support 16.2 and the walls 19.1, 19.2, 19.3 be arranged. The gas-tightness can be achieved by means not shown sealing elements such as sealing strips, sealing cords, curing sealants or gaskets. The tightness can also be achieved with other shielding such as with a shielding hood 23, as shown in the FIG. 4 for example, the elevator control unit 20 spans. All the screening means should be electrically connected to each other. Preferably, these are also grounded.

The waste heat is transferred by heat convection from the heat sinks 20.1, 21.1 to the air in the cooling duct 19. The heated air rises in the cooling air duct 19 to the outlet opening 16.6 back and thereby sucks cool air through the suction port 16.5 in the cooling air shaft 19. In order to generate the strongest possible air flow in the cooling air shaft, are preferably as shown, the units with the greatest heat, such as Power electronics unit 21 arranged in the vicinity of the suction port 16.5.

Also the FIG. 5 shows in a sectional elevation a built in the chamber 16 of the door frame 14 elevator control assembly 28 in a second embodiment. The main carrier 16.2 of this elevator control arrangement 28 corresponds in construction almost to the main carrier 16.2 of FIG. 4 Therefore, the same reference numerals are used for this and the cooling air shaft 19 and the chamber 16. Also in this embodiment, the first wall 19.1 is stepped, wherein on the first stage 19.4 a power electronics unit 21 and on the second stage 19.5, an elevator control unit 20 is arranged. Further, a fan 25 is arranged in the cooling air duct 19. Whether the blower motor is located within the cooling duct 19 or as shown in the chamber 16 depends on whether the blower motor needs to be cooled and which mounting position causes the least noise.

The use of a blower 25 makes it possible to determine the order of the units 20, 21 which must first be cooled. In the present exemplary embodiment, it is the temperature-sensitive elevator control unit 20. In the area of the power electronics unit 21 and the elevator control unit 20, a respective temperature sensor 20.8, 21.8 are arranged to monitor the operating temperature of these units 20, 21. Their signals are fed to a control device 26, which regulates the speed of the fan motor.

Since the door frame 14, the main support 16.2 and the walls 19.1, 19.2, 19.3 of the cooling air duct 19 are made of metal, only a shielding plate 24 between the power electronics unit 21 and the elevator control unit 20 must be arranged as possible gapless for shielding. Since no printed circuit boards with interference-sensitive electronic elements are arranged in the cooling air duct 19, the connecting lines 27 which connect the units 20, 21 to one another can be guided through the cooling air duct 19, so that their shielding takes place through the walls 19.1, 19.2, 19.3.

A third embodiment of a built in the chamber 16 of the door frame 14 elevator control assembly 38 is in the FIG. 6 shown in a cutaway outline. This third embodiment also essentially corresponds to the two exemplary embodiments described above with an elevator control unit 20, a first power electronics unit 21 and a power pack 18.4. For this reason, only the differences will be discussed below. The first difference consists in the installation concept of the elevator control arrangement 38 in the chamber 16. The elevator control arrangement 38 is designed as a module which can be installed or removed from the floor side. For this reason, the floor panel 31 is integrated in the elevator control arrangement 38. Furthermore, as shown, a second power electronics unit 33 may be arranged in the middle of the cooling air shaft 19, whereby cooling air flows around both flat sides of the second power electronics unit 33. Of course, the second power electronics unit 33 may also be arranged in any position in the cooling air shaft 19, always provided that the flow of cooling air is ensured. It is also true for this arrangement variant that the second power electronics unit 33 is arranged on the wall of the cooling air shaft 19, since the board of the second power electronics unit 33 is fixed on the front side by screws 39.7 on a fourth wall 19.6 of the cooling air shaft 19.
The third difference relates to the arrangement of flow guide plates 34, 35 in the elevator shaft 11. As shown, both the outlet opening 16.6, and the suction port 16.5 may be equipped with these. Of course, only one of the two openings 16.5, 16.6 Strömungsleitbleche 34, 35 have. These are pivotally mounted and are after the elevator shaft in the region of the openings 16.5, 16.6 aligned prevailing flow conditions when an elevator car 39 passes this. The orientation of the flow baffles 34, 35 aims to ensure that the air flow indicated by arrows in the cooling air duct 19 always has the same flow direction. The flow baffles 34 of the suction opening 16.5 can be pivoted independently of the flow baffles 35 of the outlet opening 16.6. Optionally, the outlet opening 16. 16 and / or the suction opening 16. 5 can also be closed by the flow guide plates 34, 35 for a short time.

FIG. 7 shows a sectional elevation of a built in the chamber 16 of the door frame 14 elevator control assembly 48 in a fourth embodiment. This has a cooling air duct 49, which is divided by a partition wall 19.9 in a first channel 49.1 and a second channel 49.2. In the first channel 49.1, a first fan 45 and in the second channel 49.2, a second fan 46 is arranged. This subdivision of the cooling air shaft 48 allows a targeted cooling of the waste heat generating units 20, 21. The noise can be significantly reduced by this subdivision, since the rotational speeds of the two fans 45, 46 can be independently controlled as needed. Preferably, therefore, the elevator control unit 20 and the power electronics unit 21 have a temperature sensor 20.8, 21.8, the signals of which are used to control the corresponding fans 45, 46.

Although the invention has been described by way of illustrating specific embodiments, it will be apparent that numerous other embodiments can be provided with the knowledge of the present invention, for example by combining the features of the individual embodiments and / or exchanging individual functional units of the embodiments. For example, in all embodiments, flow baffles may be present, or the cooling air ducts have a plurality of channels. Accordingly, two or even more fans can be used in all embodiments. Of course, the cooling air shaft can also be arranged obliquely or orthogonally to the direction of travel of the elevator car, if allow the space in the door frame.

Claims (15)

1. Door frame (14) of an elevator shaft closure (1), which separates an elevator shaft (11) of a building from a floor (9) of the building, wherein an elevator control arrangement (18, 28, 38, 48) is arranged in a chamber (16) of the door frame (14), wherein the elevator control arrangement (18, 28, 38, 48) includes an elevator control unit (20) and at least one electronic power unit (21, 21A, 21B) connectible with an elevator motor (100), characterised in that the door frame comprises in the region of the chamber (16) an opening directed towards the elevator shaft (11) and that the elevator control arrangement (18, 28, 38, 48) comprises a main carrier (16.2, 26.2, 36.2, 46.2) at which the elevator control unit (20) and the electronic power unit (21, 21A, 21B) are arranged, wherein the opening is closed by the main carrier (16.2), that the main carrier (16.2, 26.2, 36.2, 46.2), comprises a cooling air shaft (19, 49) formed by walls (19.1, 19.2, 19.3, 19.6), wherein the cooling air shaft (19, 49) connects an induction opening (16.5) formed at the main carrier (16.2, 26.2, 36.2, 46.2) with an outlet opening (16.6) formed at the main carrier (16.2, 26.2, 36.2, 46.2), the induction opening (16.5) and outlet opening (16.6) are directed towards the elevator shaft (11) and the elevator control unit (20) and the electronic power unit (21, 21A, 21 B) are arranged at the walls (19.1, 19.2, 19.3, 19.6) of the cooling air shaft (19, 49).
2. Door frame (14) according to claim 1, characterised in that the electronic power unit (21) is part of a frequency converter.
3. Door frame (14) according to one of claims 1 and 2, characterised in that the chamber (16) comprises electrically conductive chamber walls (16.1, 16.2, 16.3, 16.4) which are part of the mutual shielding of electrical and/or magnetic fields and electrical and/or magnetic waves of the elevator control unit (20) and the electronic power unit (21).
4. Door frame (14) according to any one of claims 1 to 3, characterised in that at least one wall (19. 1, 19.2, 19.3, 19.6) of the cooling air shaft (19, 49) is constructed to be electrically conductive and this is part of the mutual shielding of electrical and/or magnetic fields and electrical and/or magnetic waves of the elevator control unit (20) and the electronic power unit (21).
5. Door frame (14) according to claim 4, characterised in that at least one of the following units producing waste heat is additionally arranged at the walls (19.1, 19.2, 19.3, 19.6) of the cooling shaft (19, 49):

   - a power supply unit (18.4) for power supply of the elevator control unit (20),

   - a power supply unit (18.4) for power supply of batteries (18.8) and

   - a further electronic power unit (33),
   wherein at least one wall (19.1, 19.2, 19.3, 19.6) of the cooling air shaft (19, 49) is constructed to be electrically conductive and this wall (19.1, 19.2, 19.3, 19.6) is part of the mutual shielding of the elevator control unit (20) and the units (18.4, 21, 33) producing waste heat.
6. Door frame (14) according to claim 4 or 5, characterised in that at least one step (19.4, 19.5) is formed at at least one wall (19.1, 19.2, 19.3, 19.6) of the cooling air shaft (19), wherein only the elevator control unit (20) or only an electronic power unit (21) is arranged on a step (19.4, 19.5).
7. Door frame (14) according to any one of claims 4 to 6, characterised in that arranged in the walls (19.1, 19.2, 19.3, 19.6) are passages (19.7, 19.8) through which cooling bodies (20.1, 21.1) of components of the electronic power unit (21) and/or the elevator control unit (20) extend into the cooling air shaft (19).
8. Door frame (14) according to claim 7, characterised in that the passages (19.7, 19.8) are gas-tightly closed by circuit boards (20.2, 21.2) of the electronic power unit (21) and/or the elevator control unit (20).
9. Door frame (14) according to any one of claims 4 to 8, characterised in that at least one electronic power unit (33) is arranged in the cooling air shaft (19, 49) and the elevator control unit (20) is arranged at a side, which is remote from the cooling air shaft (19, 49), of a wall (19.1, 19.2, 19.3, 19.6), wherein the electrically conductively constructed wall (19.1, 19.2, 19.3, 19.6) is arranged between the at least one electronic power unit (21) and the elevator control unit (20).
10. Door frame (14) according to any one of claims 4 to 9, characterised in that the electronic power unit (21) and/or the elevator control unit (20) is or are covered by an electrically conductive shielding cover (23), which shielding cover (23) is electrically conductively connected with the electrically conductively constructed wall (19.1, 19.2, 19.3, 19.6).
11. Door frame (14) according to any one of claims 4 to 10, characterised in that at least one fan (25, 45, 46) is arranged in the cooling air shaft (19).
12. Door frame (14) according to claim 11, characterised in that at least one temperature sensor (20.8, 21.8) is arranged in the electronic power unit (21) and/or in the elevator control unit (20) and the signals of the temperature sensor (20.8, 21.8) serve for control and regulation of the fan (25, 45, 46).
13. Door frame (14) according to any one of claims 4 to 12, characterised in that the induction opening (16.5) and the outlet opening (16.6) have flow guide plates (34, 35) which for the purpose of assisting the cooling air flow in the cooling air shaft (19, 49) are oriented towards the travel direction of an elevator car (39) travelling in the elevator shaft (11).
14. Elevator shaft closure (1) of a building with a door frame (14), which is fastened in the building, according to any one of claims 1 to 14 and with movable doors (12.1, 12.2).
15. Elevator installation of a building with at least one elevator shaft closure (1) according to claim 14.

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