EP2714570A1

EP2714570A1 - Elevator shaft closure having an elevator control assembly

Info

Publication number: EP2714570A1
Application number: EP12724990.2A
Authority: EP
Inventors: Roman Hopp; Manuel Teixeira Pinto Dias; Christian Lüthi
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2011-05-30
Filing date: 2012-05-30
Publication date: 2014-04-09
Anticipated expiration: 2032-05-30
Also published as: ES2549216T3; WO2012163971A1; EP2530043A1; CN103648956B; KR20140082943A; CN103648956A; KR101907718B1; US20120305337A1; US9162850B2; BR112013030671B1; EP2714570B1; BR112013030671A2

Abstract

The invention relates to a door frame (14) of an elevator shaft closure (1), comprising a chamber (16) in which an elevator control assembly (18, 28, 38, 48) is arranged. The elevator shaft closure (1) separates an elevator shaft (11) of a building from a story (9) of the building. According to the invention, the elevator control assembly (18, 28, 38, 48) contains an elevator control unit (20) and at least one power electronics unit (21, 21A, 21B), which can be connected to an elevator motor (100).

Description

Elevator shaft termination with an elevator control arrangement

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.

EP 1 518 815 A1 discloses an elevator shaft termination of a building with a door frame fastened in the building and with movable doors. Of the

Lift 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 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 disclosed in EP 1 518 815 A1, 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 these sections are rarely more than 0.1 m x 0.15 m.

In elevator systems whose elevator motor is usually arranged in the elevator shaft itself. For operation of the elevator motor power electronics is also required, which is controlled by control signals of the elevator control unit. The im Elevator shaft arranged elevator motor is connected via the power electronics to the power grid. Mostly located in such elevator systems the

Elevator control arrangement in an area of a lift shaft closure. The power electronics unit is usually part of a frequency converter, which is usually arranged in the elevator shaft in the vicinity of the elevator motor. This is because power electronics units generate significantly waste heat. Furthermore, their electrical and / or magnetic fields, or electrical and / or magnetic waves, can sensitively disturb the elevator control unit. In addition, electromechanical contactors are arranged in the elevator shaft between the power electronics and the power grid, which cause considerable switching noise. Also inductors of the power electronics generate considerable operating noise, which is why this noise is preferably arranged because of the power electronics in the elevator shaft. However, this arrangement requires a high installation cost and

Cost of materials.

The object of the present invention is to provide a door frame with a

To provide elevator control arrangement, which is easy to maintain and to control and which requires a low installation costs and material costs.

This object is achieved by a door frame with a

Elevator control arrangement solved, or by an elevator shaft closure with the door frame according to the invention and by an elevator system with at least one elevator shaft closure according to the invention.

Preferred developments of the door frame, in which an inventive

Elevator control arrangement is arranged by the respective dependent

Claims defined.

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 design of the chamber 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 off

Angle profiles and / or U-Profüen is formed, 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. The chamber volume is very limited by the small cross section of the door frame of less than or equal to 0.1 m x 0.15 m.

The disadvantages listed below have led to the prejudice that the integration of the power electronics unit in an elevator control arrangement, which is arranged in the chamber of a door frame, is widely rejected by the art. The waste heat of individual electronic components of the elevator control arrangement, in particular the electronic components of the power electronics unit in the spatially narrow chamber of the door frame could lead to the reliability of these and others

Electronic components of the elevator control arrangement is impaired. Thus, the electronic components can overheat and be destroyed by heat accumulation or the waste heat can cause the electronic components outside the permissible

Operating temperature and this leads to errors in the processing of signals. Furthermore, operators, building dwellers and users of a lift system are very unpopular with excessive operating noise from contactors and inductors when they are audible on the floor.

The advantages of integrating the power electronic unit in the

Elevator control arrangement but are diverse. 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, there is no separate power supply line between the

Elevator control system and the power supply necessary because the power supply of the

Elevator control arrangement, the elevator control unit and the

Power electronics unit feeds. Secondly, already at the end of the factory assembly of the elevator control arrangement, the elevator control unit and the

Power electronics unit matched and adjusted. Furthermore, the entire elevator control arrangement can be tested in the factory. this leads to In addition to the need for elaborate adjustments during installation, repair or maintenance of the elevator system. 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 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 its 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 removed by suitable means in the elevator shaft and the units are cleverly arranged in the elevator control arrangement using the surrounding components, integration is possible. Furthermore, by the skillful arrangement of the components taking advantage of the surrounding components of the air duct existing in the elevator shaft to dissipate the waste heat used. This draft arises in particular by the movements of one or more elevator cars and balancing weights in the elevator shaft.

The dissipation of the waste heat should not take place over the door frame itself, otherwise it would heat up. By dissipating the waste heat in the

Elevator shaft has 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.

The elevator control arrangement is preferably also accessible from the elevator shaft. To achieve this, the door frame in the region of the chamber may include a directed against the elevator shaft opening. 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 exceed the

Elevator shaft and the opening in the door frame spreads to the floors. The feature "arranged on the main carrier" means that the unit is arranged in the immediate vicinity of the main carrier. The power electronics unit and the

Elevator control unit therefore does not necessarily have on the surface of the Main carrier rest. 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.

A first way to dissipate the waste heat in the elevator shaft is that in the main carrier at least one breakthrough is arranged. Through this breakthrough, a heat sink of an electronic component of the power electronics unit, the elevator control unit or a radiator of a cooling system extends into the elevator shaft when the main carrier is installed in the door frame. In order to prevent the propagation of combustion gases through the elevator shaft, the at least one opening of the main carrier is closed in a gas-tight manner by the heat sink, radiator or sealing elements passing therethrough.

The second way to dissipate the waste heat in the elevator shaft is that at least one heat sink of an electronic component of the power electronics unit, the elevator control unit or the radiator of a cooling system is thermally conductively connected to the main carrier and its waste heat transmits to this. The main carrier itself has a high thermal conductivity and includes cooling fins, which are directed towards the elevator shaft, when the main carrier is installed in the door frame. So that the waste heat is not transferred to those Türzargenteile which are facing the floor, may be between the contact surfaces of Türzargenteile and the main carrier an insulating material, such as a heat-resistant, the edges of the opening circumferential seal. The heat sink of an electronic component or the radiator of a cooling system may have any shape suitable for transferring heat to the main carrier. For example, the heat sink or cooler may have a flat, smooth contact surface, which can be replaced by suitable

Fastener is pressed against a flat, smooth contact surface of the main carrier. In the case of heat sinks and radiators extending through the main support, they can of course have cooling fins extending into the elevator shaft.

In the present document by cooling system is to be understood an apparatus which is arranged in the chamber and the heat transport of the waste heat of electronic components of the elevator control arrangement to the main carrier or a through the Main carrier supported by radiator. Preferably, cooling systems are used, which work as quiet as possible. Such a cooling system can be, for example, a heat pipe (heat pipe), a pump-driven coolant circuit or a Peltier element. The Peltier element could be operated, for example, with the braking energy of the elevator motor, instead of this one

Destroy braking resistor. Of course, a connected to the water network of the building flow cooling system could be integrated into the main carrier, but this makes little sense for economic and environmental reasons.

Because the cooling fins of the main carrier or the cooling fins of the heat sink

or extend into the elevator shaft, these are detected by the draft of at least one elevator car driving in the elevator car and efficiently cooled. In order to make better use of the cooling effect of the draft, whose flow direction takes place substantially in the longitudinal extent of the elevator shaft, the cooling ribs of the main carrier or the cooling fins of the heat sink or radiator can be designed and arranged in a suitable manner. For example, these can in their longitudinal extent at an angle between 1 ° and 60 ° to

Movement direction of the elevator car arranged in the elevator car be arranged.

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 and / or Abschirmfolien be arranged when one side of the chamber is limited by the masonry of the building.

Part of the mutual shielding means that the conductive chamber wall contributes to the shielding of the electromagnetic interference influences of the other units, but this does not necessarily completely accomplished. By a clever arrangement of the elevator control unit and the power electronics units on the main carrier, the number of additional shielding means can be minimized. By "unit" is not necessarily meant a physical unit, for example, a power electronics unit can also several, by connecting lines with each other connected and equipped with electronic components printed circuit boards include. The term "unit" thus refers to the function of a component or a group of components. The same applies to the elevator control unit or to a power supply unit.

For example, an electrically conductive shielding cover, a shielding hood, a shielding housing or at least one intermediate chamber wall can serve as the shielding means. The power electronics unit and / or the elevator control unit may be completely enclosed with electrically conductive parts serving as shielding means. An exception may be the projecting into the cooling air duct heat sink or radiators, which should be in order for optimum 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.

In one development of the invention, at least one of the following units generating waste heat may be arranged on the main carrier:

• 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 by the main carrier or by the main carrier reaching through heatsink and / or radiators in the elevator shaft.

According to the European standard EN81, in which the safety rules for the

Construction and installation of elevators are set, two independent switching elements are necessary to interrupt the flow of energy between the elevator motor and the power grid. These switching elements can be, for example, contactors, which are preferably also arranged in the chamber of the door frame.

Accordingly, the elevator control arrangement may comprise at least one contactor, which is arranged between the power grid and the power electronics unit. To minimize the switching noise of at least one contactor, the

Elevator control arrangement comprising a control device, the

Supply voltage of the switching coil of the contactor in dependence on the current to be switched controls.

The power electronics unit for operating an elevator motor is preferably part of an electronic frequency converter. In principle, the power electronics of an electronic (static) frequency converter consists of a rectifier that feeds a DC or DC link, and one of them

DC link powered inverter. Furthermore, the frequency converter may have further electronic components, for example, a pulse width modulation for driving the inverter to generate its output frequency,

Memory modules for storing data, a power supply for supplying the other electronic components and the like.

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 converts the excess energy from the DC link into one

Braking resistor conducts and converts there into heat. Otherwise, the

DC bus voltage rise and destroy the capacitors. However, there are also more complex, regenerative frequency converter 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 DC 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 must be avoided to prevent

Interference emissions are often shielded. Remedy can also create a so-called sine filter between the frequency converter and the elevator motor. 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 to reduce the stored energy must be taken. A variant that is usually used in low-cost frequency converters is the conversion of electrical energy into thermal energy with the aforementioned brake chopper, 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. The waste heat of the brake chopper is also so large that it can not be accommodated in the chamber of the door frame. Regenerative frequency inverters are therefore particularly suitable for the present invention. 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 escalators and moving walks. Instead of a second contactor, the two required according to EN 81 can be used

Separation points between the power grid and the elevator motor can be realized by a contactor and by blocking motor-side IGBT. The contactor is located between the power grid and the frequency converter, the motor-side IGBT between the DC link and the elevator motor. To ensure the separation will be

the status of the contactor is queried via a positively driven auxiliary contact and the drive pulses of the motor-side IGBT are blocked. This functionality is not checked by hardware security elements but a software malfunction test (EN81 test).

The use of shooters can be completely dispensed with. To achieve this, the DC circuit of the drive with a

power electronic switch, preferably a DC link IGBT regulated or controlled. For this purpose, a pulse width modulated signal of a signal generator is used. Instead of the contactor arranged between the frequency converter and the current source, the DC link IGBT can now be used for

Interruption of the energy flow can be used. As required by EN 81, the two disconnection points are realized by blocking the DC link IGBT and by blocking the motor-side IGBT. To ensure double separation, firstly the voltage across the DC link IGBT and / or the current through it is measured and monitored, and the drive pulses are blocked for all IGBTs (DC link and motor side). The replacement of the shooter by a corresponding

configured frequency converter has for the present invention outstanding advantages:

• greater reliability or contact safety, since in

Difference to the contactor can not glue contacts,

• no switching noises,

• less complex wiring (power and fine wiring),

• Simplification of the EMC concept, the IGBT can be integrated directly into the interconnects in the DC link.

• smaller space requirement

• lower energy requirements and consequently less waste heat Another source of annoying noise may be choke coils. Their metal core usually consists of metal core sheets, which are braced to form a laminated core. But the tension is usually not sufficient to prevent mutual vibration of these metal core sheets when the choke coil is applied, for example, with alternating current. In order to keep the noise in the door frame as low as possible, the elevator control arrangement may have at least one choke coil whose metal core sheets are welded together or the gaps between the metal core sheets are filled with a Kunststoffvergussmasse.

An elevator shaft termination of a building, as stated above, has a door frame mounted in the building with a chamber in which the

Elevator control arrangement is arranged with inventively integrated power electronics or integrated frequency converter. 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.

The elevator shaft closure according to the invention or its

Door frame according to the invention is described below by way of examples and with

Referring to the drawings explained in more detail. Show:

Figure 1: a lift shaft closure in three-dimensional view with a

Door frame and an elevator control arrangement according to the invention, arranged in a chamber of the door frame;

Figure 2: door jamb parts of the door frame of Figure 1 in three-dimensional

Exploded view, which form the chamber and the elevator control arrangement according to the invention in a first embodiment;

Figure 3: the door frame in three-dimensional view with a view from

Elevator shaft on the floor, whose door post includes the door jamb parts shown in Figure 2 and the elevator control arrangement in a second embodiment, wherein the dissipation of the waste heat in the elevator shaft takes place both via the main carrier and via a radiator; Figure 4: in a cut-away elevation built in the chamber of the door frame

Elevator control arrangement in a third embodiment, wherein the dissipation of the waste heat takes place exclusively via the main carrier;

Figure 5: a cut-away plan built into the chamber of the door frame

Elevator control arrangement in a fourth embodiment, wherein the dissipation of the waste heat takes place exclusively over reaching through the main carrier heat sink and a radiator;

Figure 6: Schematic diagram of a Trennstellen- frequency converter in a first

Execution;

Figure 7: Schematic diagram of a separation point frequency converter in a second

Design of the regenerative capable.

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

Elevator shaft 11 limited.

The elevator shaft 11 is separated from the floor 9 by the elevator shaft termination 1. The elevator shaft end 1 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 orthogonal spatial coordinate system shown in Figure 1 with the other axes Y and Z. The door frame 14 has three Türzargenelemente, namely two lateral, vertical Türzargenelemente 14.1, 14.2, form 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 side post wall 16.3 face the floor 9. To the outer post walls 16.1 and 16.3 can still inner

Post walls be present, which are explained in more detail in connection with Figures 2 and 3.

The outer lateral post wall 16.3 has an outer opening, which allows access to the chamber 16. This outer opening may have any suitable size, in particular it may extend over most of the lateral post wall 16.3, as indicated in FIG. Of course, the

Outer opening 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 the service mode, then the cover 17 is in its service position, whereby it is completely dismantled, that is to say without contact with the vertical door frame element 14.1. Alternatively, the lid 17 may also be fastened by means of a hinge on the vertical door frame element 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. Of course, can be dispensed with the outer opening and the cover 17 when the access to the chamber 16 from the direction of the floor 9 is not required. The waiver of the outer opening and the lid 17 has in particular the fire protection concerning advantages.

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

User interface and the like more.

FIG. 2 shows door jamb parts of the door frame 14 from FIG. 1 in a three-dimensional exploded view. The features already described in Figure 1 have the same reference numerals. In the figure 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 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 lateral post wall 16.4 is directed against the masonry of the building wall 10 when the door frame 14, as shown in Figure 1, is embedded in the wall opening of the building wall 10.

Due to the construction with the above-described post walls 16.1, 16.3, 16.4, through 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 pieces 16.1, 16.3 and 16.4, is replaced by a main support 16.2

Elevator control assembly 18 closed in a first embodiment. 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. For the sake of clarity, the outer side post wall 16.3 is connected to the main carrier 16.2 and, as the arrow 5 shows, shown pivoted by 90 °.

The main carrier 16.2 is thermally decoupled from the adjacent post walls 16.3, 16.4 by means of strips of insulating material 16.5, 16.6. If the post walls 16.1, 16.3, 16.4 are made of steel alloys with high chromium content, so-called stainless steels, the use of the strips of insulating material 16.5, 16.6 is unnecessary, since these steel alloys have a very low thermal conductivity.

If the elevator control assembly 18 must be replaced, it can from the side of the elevator shaft 11 ago by releasing the main carrier 16.2 of the

Post walls 16.1, 16.3 and 16.4, completely expanded. 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. The elevator control arrangement 18 essentially comprises the following components:

The main carrier 16.2,

A lift control unit 20 attached to the main support 16.2,

a power electronics unit 21 attached to the main carrier 16.2 for operating an elevator motor (power supply and optionally regenerative power supply),

• an optional second power electronics 19 for the return of the

Elevator motor generated electrical energy,

A power supply unit 18.4 for supplying the elevator control unit 20 and / or

Batteries 18.8,

Optionally coolant 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,

• Power cable and connections to

Floor panels 31 and for connection 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,

• Equipment used for emergency evacuation, such as batteries 18.8.

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),

• Telealarm system and / or Intercom (for example, 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 skillful selection and arrangement of the units 20, 21 whose 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. If due to the limited, the chamber 16 facing surface of the main support 16.2 not all From heat generating units can be arranged directly on the main support 16.2, various options are open. These possibilities are in the

Description of Figures 4 and 5 explained in more detail. Should the cooling capacity of the

Main support 16.2 do not suffice as a flat plate, cooling fins can be provided. The main carrier 16.2 shown in Figure 2 has such cooling fins 16.8, which are arranged parallel to the longitudinal extent of the main carrier 16.2. The illustrated main carrier 16.2 is preferably as aluminum extruded profile together with the

Cooling ribs 16.8 monolithically shaped. Of course, the cooling fins 16.8 can also be manufactured as individual parts and be connected by means of fasteners or cohesively with the main support 16.2.

3 shows the door frame 14 in a three-dimensional view looking from the elevator shaft 11 to the floor 9. The door post 14.1 of the door frame 14 includes the door post parts 16.1, 16.3, 16.4 shown in Figure 2, the lid 17 and a elevator control assembly 28 in a second embodiment , In FIG. 3, however, only the outer lateral post wall 16.3, the main carrier 26.2 and the cover 17 of the door post 14.1 are visible. In order to maintain the overview, the representation of the door leaves which, according to FIG. 1, separate the floor 9 from the elevator shaft 11 when there is no cabin in the area of the elevator shaft termination, has also been dispensed with.

The elevator control assembly 28 has substantially the same through which

Main carrier 26.2 hidden units (elevator control unit,

Power electronic unit, power supply, etc.), as the previously described elevator control arrangement 18 of Figure 2. Only the main carrier 26.2 shown in Figure 3 differs in its embodiment of this.

In contrast to FIG. 2, the cooling ribs 26.8 shown in FIG. 3 are arranged at an angle α on the main carrier 26. The illustrated angle α is about 30 °, but it can also be chosen differently due to flow studies in the elevator shaft, for example, between 1 ° and 60 °. The fact that the cooling ribs 26.8 are not arranged parallel to the longitudinal extent of the main carrier 26.2, the draft of an elevator car can be better utilized, since the draft is substantially parallel to the longitudinal extent of the main carrier 26.2. The air thus essentially flowing in the vertical direction of the draft is deflected and swirled by the obliquely arranged cooling ribs 26.8. This leads to a better mixing of cold and heated air in the interstices of the cooling fins 26.2 and thus to increased cooling capacity. Furthermore, the mixed, heated air is deflected by the obliquely arranged cooling ribs 26.2 from the region of the main carrier and distributed in the elevator shaft 11.

The cooling fins 51 arranged parallel to the longitudinal extension of the main carrier 26. 2 are part of a cooling system arranged in the chamber 16, which is described in detail in FIG.

FIG. 4 shows, in a cutaway elevation, a lift control arrangement 38 installed in the chamber 16 of the door frame 14 in a third embodiment. This has an elevator control unit 20 and a

Power electronics unit 21 on. The elevator control unit 20 is arranged on the chamber 16 side facing the main carrier 36.2. Their board 20.1 has various electronic components, with some electronic components 20.3 generate waste heat. These electronic components 20.3 have heat sink 20.2, which are connected to the main carrier 36.2 and the heat transferred by heat conduction or heat diffusion, on this. In order to ensure heat transfer inexpensively and in the simplest way, one each on the main support 36.2 and the heat sink 20.2 flat and smooth contact surface are formed, which abut against each other.

As shown in Figure 4, the power electronics unit 21 may be divided into different circuit boards 21.1, 21.2, wherein their during operation considerable waste heat generating, "hot" electronic components 21.3 are summarized for example on a first circuit board 21.1 and the remaining, "cold" electronic components 21.4 are arranged on a second circuit board 21.2. Of course, the "cold" electronic components 21.4 have an internal electrical resistance, which leads to power losses and thus to waste heat. The heat development of this

But electronic components 21.4 is so small that this heat can be dissipated by heat convection through the air in the chamber 16 to the Türzargenelemente which hardly heat due to their mass. The second circuit board 21.2 can be arranged arbitrarily in the chamber 16, while the first circuit board 21.1 with the "hot" electronic components 21.3 preferably arranged on the main carrier 36.2 becomes. Of course, the above-described division into two or more printed circuit boards is also possible in the elevator control unit 20.

If too little area is present on the main carrier 36.2, the first printed circuit board 21.1 arranged remotely from the main carrier 36.2 can, as shown, be connected in a heat-conducting manner to the main carrier 36.2 by means of a cooling system 50. The cooling system 50 shown in Figure 4 is a pump-driven coolant circuit. The cooling system 50 has a main support 36.2 arranged cooler 52.1, a flow 52.2, a return 52.3 with pump 52.4 and a system heat sink 52.5. At the system heat sink 52.5, the first circuit board 21.1 is arranged. Of course, the

Power electronics unit 21 may also be arranged on a circuit board, wherein the system heat sink 52.5 may extend over the entire board or only over areas of the board in which "hot" electronic components are arranged.

As coolant 52.6 liquids such as water or water-glycol mixtures can be used. But even at room temperature and atmospheric pressure gaseous substances such as propane, butane, or fluorine-chlorine hydrocarbons are

usable. When using gases, the coolant circuit can be designed like that of a heat pump with a diaphragm and with a compressor instead of the pump 52.4.

Within the chamber, a power supply 18.4 is further arranged on the system heat sink 52.5, the heat-generating electronic components are also cooled by the cooling system 50. The transferred to the main carrier 36.2 waste heat of

Elevator control unit 20 and the power electronics unit 21 and the power supply 18.4 is transmitted by heat convection from the main carrier 36.2 to the air in the elevator shaft 11. In order to increase the exchange surface, the main carrier 36.2 directed against the elevator shaft 11 cooling fins 16.8.

For the purpose of shielding the elevator control unit 20 and the power electronics unit 21, there are electrically conductive shielding hoods 32, 33, such as in FIG. 4, for example, straddling the elevator control unit 20 and the power electronics unit 21. All the screening means should be electrically connected to each other. Preferably, these are grounded. The elevator control arrangement 38 furthermore has at least one monostable relay or a contactor 75, which is arranged between a power grid 90 and the power electronics unit 21 for operating an elevator motor. To minimize the switching noise of the at least one contactor 75, the

Elevator control arrangement 38 have a control device 75.1, the

Supply voltage of the switching coil of the contactor 75 in dependence on the current to be switched controls.

Also, Figure 5 shows a cutaway elevation in the chamber 16 of the door frame 14 built elevator control assembly 48 in a fourth embodiment, wherein the main support 46.2 openings 65, 66, 67, through which the heat sink 40.2 a second power electronics unit 19 and a radiator 62.1 of Pass through cooling system 60. The second power electronics unit 19 serves to regenerate the electrical energy generated by the elevator motor into the power grid. The board 71 of the second power electronics unit 19 completely covers the openings 66, 67, so that the chamber 16 is separated in a gas-tight manner from the elevator shaft 11. Further, on the board 71 of the second power electronics unit 19, a choke coil 68 is indicated with a metal core 69, the metal core sheets are welded together or the gaps between the metal core sheets are filled with a Kunststoffvergussmasse.

Both the radiator 62. 1 and the cooling bodies 40. 2 have cooling fins 51. The remaining components of the elevator control assembly 48 are similar in construction to the elevator control assembly 38 of Figure 4, which is why the same reference numerals are used for them. In the embodiment of Figure 5, the removal of waste heat of the electronic components is not on the main support 46.2, but directly through the heat sink 40.2 and the radiator 62.1, the cooling fins 51 extend into the elevator shaft 11. These are cooled in particular by the draft, which in

Elevator shaft 11 caused by the movements of an elevator car 13. The cooling system 60 shown in FIG. 5 is a heat pipe. This has a system heat sink 62.5, which is connected by a connecting pipe 62.2 with the radiator 62.1. In the system heat sink 62.5, a liquid 62.6 is arranged, which by the action of the waste heat of electronic components of the Power electronics unit 21 and the power supply 18.4 evaporates. The resulting vapor 62.4 rises through the connecting pipe 62.2 to the radiator 62.1 and condenses on the cool inner walls of the radiator 62.1 to condensate droplets 62.3, wherein the heat transported by the steam waste heat is discharged to the radiator 62.1. The

Condensate drops 62.3 flow back into the system heat sink 62.5 under the influence of gravity.

In the chamber 16, a battery 18.8 is further arranged, which can be periodically charged by the power supply 18.4. The battery 18.8 is used to power the

Elevator control arrangement 48 to certain in case of failure of the power grid

To maintain emergency functions. The power electronics unit 21 is a divisional frequency converter and has two required by the standard EN 81 separation points, as shown schematically in Figures 6 and 7 and described below. Therefore, in this embodiment of the elevator control arrangement 48 also no electromechanical switching element such as a monostable relay or a contactor is provided.

The elevator control unit 20 is by a shielding hood 32 and an electrically conductive mounting plate 70 of the elevator control assembly 48 of electric and / or magnetic fields and electric and / or magnetic waves of

Power electronic units 19, 21 protected.

6 shows a schematic diagram of a power electronics unit is shown in a first embodiment, which has two separation points according to the European standard EN 81. The power electronics illustrated in FIG. 6 is a disconnecting frequency converter 21A that can be integrated, for example, in an elevator control system of FIGS. 1 to 3 and FIG. 5, without having to use at least one electromechanical switching element.

Like a frequency converter known in the art, also has the

Trennstellen- frequency converter 21A a DC voltage intermediate circuit 108. This is connected via a line filter 101 and a three-phase rectifier bridge 102 (network-side power semiconductors) to a power grid 90. Between the elevator motor 100 and the DC intermediate circuit 108 is an inverter 107 with IGBT arranged, which converts the direct current of the DC intermediate circuit 108 in three-phase current with variable frequency. Between the plus path 111 and the minus path 112 of the DC intermediate circuit 108, two snubber capacitors 103, 106, intermediate circuit capacitors with parallel resistors 104 and a brake chopper 105, which is switched on by means of a brake IGBT 109, are furthermore arranged.

According to EN 81, two independent switching elements are necessary in order to interrupt the energy flow from the feeding power network 90 to the elevator motor 100. In the known state of the art, these two disconnection points are realized by a contactor arranged between the line filter and the three-phase rectifier bridge and by the blocking of the inverter IGBT. To ensure separation, the status of the contactor is queried via a positively driven auxiliary contact and the drive pulses of the inverter IGBT are blocked. This functionality is not checked by hardware security components but a software malfunction test. Furthermore, the DC intermediate circuit must be charged in a defined manner by frequency converters of the aforementioned type, so that the snubber capacitors (damping capacitors) and the DC link capacitors are not destroyed. Loading the

DC intermediate circuit usually takes place with the aid of a switched series resistor. After charging the DC link, it is connected directly to the grid via the contactor.

Instead of the contactor, the disconnector frequency converter 21 A shown in FIG. 6 has a power electronic switch, preferably a DC link IGBT 110 in the DC voltage intermediate circuit 108. This can be arranged either in the plus path 111 or in the minus path 112. Both in the positive path 111 and in the minus path 112, a DC reactor choke 114 may be arranged. The DC voltage intermediate circuit 108 is voltage-regulated and / or current-controlled by pulse-width-modulated clocking of the DC link IGBT 110

respectively controlled, defined loaded. After charging, the

DC link IGBT 110 permanently switched on. Accordingly, the known in the prior art, switched series resistor. If the DC link IGBT 110 is disabled, the DC link 108 and thus the power flow are interrupted. Together with the blocking of the drive pulses of the motor-side IGBT of the inverter 107 is required by EN 81 double separation of the Energy flow available.

To ensure the double separation, the voltage across the

DC link IGBT 110 and / or the current measured by this (no energy flow available), and the drive pulses of all IGBT of the inverter 107 and the DC link 108 locked. Optionally, motor choke coils 113 may be provided for each phase between the inverter 107 and the elevator motor 100.

In the figure 7 is a schematic diagram of a power electronics unit is shown in a second embodiment, which has two separation points according to the European standard EN 81. The power electronics shown in Figure 7 is a disconnect frequency converter 21B which is capable of regenerating, that is, the braking energy of the elevator motor 100 and the energy of the DC intermediate circuit 128 can be fed back into the power grid 90. In order to achieve this, the regenerative isolating frequency converter 21B shown in FIG. 7 differs from that shown in FIG. 6 in that it has two inverters 122, 127. The first inverter 122 is connected between the line filter 101 and the

DC intermediate circuit 128 arranged, the second inverter 127 between the DC intermediate circuit 128 and the elevator motor 100. Between the positive path 131 and the negative path 132 of the DC intermediate circuit 128, two snubber capacitors 103, 106 and DC link capacitors with parallel resistors 104 are also arranged. Due to the regenerative capability eliminates the need to arrange a brake chopper in the DC intermediate circuit 128.

Also shown in Figure 7, the regenerative disconnector frequency converter 21B includes a power electronic switch, preferably a

DC link IGBT 110 in the DC intermediate circuit 128. This can be arranged either in the plus path 131 or in the minus path 132. Of the

DC intermediate circuit 128 is defined by pulse width modulated clocking the DC link IGBT 110 loaded. The pulse-width-modulated clocking is voltage-controlled and / or current-controlled, or voltage-controlled and / or current-controlled. After charging, the DC link IGBT 110 remains permanently on. Accordingly, the known in the prior art, switched series resistor. When the DC link IGBT 110 is disabled, the DC link 128 and thus the power flow are interrupted. Together with the blocking of the drive pulses of the motor-side IGBT of the second

Inverter 127 is the double separation required by EN 81

Energy flow available. By blocking the drive pulses of the line-side IGBT of the first inverter 122, even a third separation point can be generated. Furthermore, motor choke coils 113 may be provided for each phase between the second inverter 127 and the elevator motor 100, and mains choke coils 115 may be provided between the mains filter 101 and the first inverter 122.

Although the invention has been described by way of illustrating specific embodiments, it will be apparent that many more

Embodiments with knowledge of the present invention can be provided, for example, by combining the features of the individual embodiments with each other and / or individual functional units of the embodiments are exchanged. For example, in all embodiments, the heat sink of the electronic components of the elevator control unit and the

Leistungselektronikeinheit be thermally conductively connected to the main carrier.

Of course, the cooling fins as the cooling fins may be arranged at an angle to the longitudinal extension of the main carrier He.

Claims

claims

A door frame (14) of an elevator shaft termination (1) which separates a lift shaft (11) of a building from a floor (9) of the building, wherein a lift control arrangement (18, 28, 38 , 48), wherein the elevator control arrangement (18, 28, 38, 48) a

Elevator control unit (20) and at least one power electronics unit (21, 21A, 21B) connectable to an elevator motor (100), characterized in that it includes an opening directed towards the elevator shaft (11) in the area of the chamber (16) and the elevator control arrangement (18, 28, 38, 48) has a main carrier (16.2, 26.2, 36.2, 46.2) on which the elevator control unit (20) and the power electronics unit (21, 21A, 21B) are arranged, the opening being through the main carrier (16.2, 26.2, 36.2, 46.2) is closed.

2. Door frame (14) according to claim 1, characterized in that in the main carrier (16.2, 26.2, 36.2, 46.2) at least one opening (65, 66, 67) is arranged through which opening (65, 66, 67) a heat sink (20.2, 40.2) of an electronic component (20.3) of the power electronics unit (21, 21A, 21B), the elevator control unit (20) or a radiator (62.1) of a cooling system (60) extends into the elevator shaft (11) when the main carrier (16.2, 26.2 , 36.2, 46.2) in the door frame (14) is installed, wherein the at least one opening (65, 66, 67) of the main carrier (16.2, 26.2, 36.2, 46.2) by reaching through the heat sink (20.2, 40.2), radiator (62.1 ) or gas-tightly sealed by sealing elements.

3. Door frame (14) according to claim 1 or 2, characterized in that at least one heat sink (20.2, 40.2) of an electronic component (20.3) of the power electronics unit (21, 21A, 21B), the elevator control unit (20) or a cooler (52.1) one

Cooling system (50) with the main carrier (16.2, 26.2, 36.2, 46.2) is thermally conductively connected, the main carrier (16.2, 26.2, 36.2, 46.2) has a high thermal conductivity and cooling fins (16.8, 26.8) includes the against the elevator shaft (11) are directed towards when the main carrier (16.2, 26.2, 36.2, 46.2) in the door frame (14) is installed.

4. Door frame (14) according to claim 2 or 3, characterized in that the cooling system (50, 60) is a heat pipe, a pump-driven coolant circuit or a Peltier element.

5. door frame (14) according to one of claims 2 to 4, characterized in that the cooling ribs (26.8) of the main carrier (16.2, 26.2, 36.2, 46.2) or the cooling fins (51) of the heat sink (20.2, 40.2) or radiator ( 62.1) in their longitudinal extent at an angle between 1 ° and 60 ° to the direction of movement of a lift shaft (11) arranged elevator car (13) are arranged.

6. Door frame (14) according to one of claims 1 to 5, characterized in that the chamber (16) electrically conductive chamber walls (16.1, 16.2, 16.3, 16.4) comprises the 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 power electronics unit (19, 21, 21A, 21B).

7. Door frame (14) according to one of claims 1 to 6, characterized in that the power electronics unit (19, 21, 21A, 21B) and / or the elevator control unit (20) by an electrically conductive shielding cover, a shielding hood (32, 33) , a shielding or shielded by at least one chamber intermediate wall.

8. door frame (14) according to one of claims 1 to 7, characterized in that further on the main carrier (16.2, 26.2, 36.2, 46.2) at least one of the following, waste heat generating units are arranged:

A power supply unit (18.4) for supplying the elevator control unit (20),

A power supply (18.4) for supplying batteries (18.8),

• another power electronics unit (19).

9. door frame (14) according to one of claims 1 to 8, characterized in that the elevator control arrangement (18, 28, 38, 48) at least one contactor (75) between a power grid (90) and the power electronics unit (21, 21A , 21B) and a control device (75.1), which regulates the supply voltage of the switching coil of the contactor (75) in dependence on the current to be switched.

10. Door frame (14) according to one of claims 1 to 9, characterized in that the power electronics unit (19, 21, 21A, 21B) is a frequency converter.

11. Door frame (14) according to claim 10, characterized in that

the frequency converter (19, 21, 21 A, 21 B) in the DC voltage intermediate circuit has a power electronic switch (110) for interrupting the flow of energy from the power grid (90) to the elevator motor (100).

12. Türzarge (14) according to any one of claims 1 to 11, characterized in that the elevator control arrangement (18, 28, 38, 48) at least one choke coil (68, 113, 114, 115), the metal core sheets a metal core (69) are welded or filled the gaps between the metal core sheets with a Kunststoffvergussmasse.

13. elevator shaft end (1) of a building with a door frame (14) fastened in the building according to one of claims 1 to 12 and with movable doors (12.1, 12.2).

14. Elevator installation of a building with at least one elevator shaft termination (1) according to claim 13.