EP3772623A1 - Dispositif déshumidificateur et procédé de déshumidification - Google Patents

Dispositif déshumidificateur et procédé de déshumidification Download PDF

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Publication number
EP3772623A1
EP3772623A1 EP19191097.5A EP19191097A EP3772623A1 EP 3772623 A1 EP3772623 A1 EP 3772623A1 EP 19191097 A EP19191097 A EP 19191097A EP 3772623 A1 EP3772623 A1 EP 3772623A1
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EP
European Patent Office
Prior art keywords
dehumidifying
rotor
drive
axis
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19191097.5A
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German (de)
English (en)
Inventor
Ayhan TURAL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brunner Thermo GmbH
Original Assignee
Brunner Thermo GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brunner Thermo GmbH filed Critical Brunner Thermo GmbH
Priority to EP19191097.5A priority Critical patent/EP3772623A1/fr
Priority to PCT/EP2020/072299 priority patent/WO2021028357A1/fr
Publication of EP3772623A1 publication Critical patent/EP3772623A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/1458—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators
    • F24F2003/1464—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators using rotating regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1004—Bearings or driving means

Definitions

  • the invention relates to a dehumidifying device for reducing the water content of a gaseous substance, in particular air, comprising a housing with a flow path through which the gaseous substance can flow, a dehumidifying element arranged in the flow path for receiving water from the gaseous substance and a drive with a rotatable one Drive element, the dehumidifying element being rotatable with the drive element about an axis of rotation.
  • the invention also relates to a method for reducing the water content of a gaseous substance.
  • air is a gas mixture that mainly consists of oxygen and nitrogen. But air also contains a proportion of water in the form of water vapor. The less water the air contains, the drier it is called and vice versa, the more water the air contains, the more humid it is called.
  • Dehumidifying air means reducing the amount of water in the air. If a relative residual humidity of over 40% is permitted, dehumidifying the air using the condensation principle is often sufficient, in which the moist air is led past cooling registers or heat exchangers, where part of the water vapor contained in the air condenses. Relative humidity is the ratio of the actually contained to the maximum possible mass of water vapor in the air, the maximum possible mass of water vapor being dependent on the temperature of the air.
  • sorption is the selective uptake of water molecules, which are contained in the air in the form of water vapor, by other substances.
  • adsorption d. H. the accumulation of water molecules on the surface of a solid body (adsorbent), as well as absorption, i.e. the absorption of water molecules inside a solid body (absorbent) under this term.
  • the sorbent itself is regenerated.
  • a second air stream with typically warm air, the so-called regeneration air is passed through the rotating rotor, with the moisture stored in the sorbent being given off to the regeneration air.
  • the thermal energy required for this is supplied by the warm regeneration air flow itself, which cools the regeneration air. The sorbent is therefore not used up.
  • the temperature of the process air is, for example, in the range from 10 ° C to 45 ° C and that of the regeneration air, for example, in the range from 30 ° C to 160 ° C.
  • the two air flows with the moist, cold and the dry, warm air are spatially separated from one another, i.e. H. they are guided through the rotor in separate sectors of the area traversed by the rotor, so that each sector or section of the rotor moves through both air flows during one rotation.
  • the so-called process sector, i.e. H. the sector through which the process air is passed for drying is usually around 240 ° - 270 °.
  • the regeneration sector, i.e. H. that sector through which the regeneration air for the regeneration of the sorbent is passed is usually about 90 ° -120 °. I.e. around two thirds to three quarters of the area of the rotor is used as a process sector and around a quarter to a third is used as a regeneration sector.
  • the two air flows are separated and sealed off from each other and from the environment, so that neither the different air flows mix with one another nor air or other substances from the environment undesirably get into one of the two air flows. All components are housed in a gas-tight and insulated housing, typically made of stainless steel.
  • such sorption wheels are driven at a constant speed for maximum operation of the system.
  • the design is therefore usually based on the maximum value of the intended driving cycles.
  • the low operating data resulting from any different operating conditions are not taken into account. This means that the entire sorption wheel including the drive is overdimensioned for continuous operation so that the maximum requirements, which are usually only of a relatively short duration, can be met.
  • recuperation systems are also known, which are used to recover heat from exhaust air or flue gases in order to use the Energy, for example, to preheat the process inlet air.
  • the rotor is rotatably mounted in its center and the drive for the rotor is a conventional electric motor with carbon brushes, which is arranged laterally outside the rotor and drives it via a typically oil-lubricated gear with toothed wheels or a chain or belt.
  • Both the engine and the transmission for example the chain or belt, generate abrasion during operation.
  • the rotor can warp, i.e. H. deform in an undesirable manner. This is particularly due to the unilateral force of the drive arranged outside the rotor on the circumference of the rotor. As a result, there is a large distance between the point of application of the drive force and the bearing of the rotor, so that correspondingly large leverage forces act on the rotor. This is particularly true when there is a change in the driving force.
  • Such an undesirable deformation of the rotor can, however, also occur due to the locally different thermal loading of the rotor if the latter moves alternately through a warm and a cold air stream with each rotation.
  • Such a device for dehumidifying is for example from US 2017/227241 A1 known.
  • the rotor is built into a partition which separates the entry and exit areas and the rotor is sealed against the partition.
  • the rotor is driven by a laterally arranged motor, either directly or indirectly via a belt. This device has the disadvantages already mentioned.
  • the rotor wheel is fixed in a frame and is driven, for example, by a brushless DC motor with or without sensors.
  • the rotor of the motor comprises a segmented rotor strip along the circumference of the rotor wheel for providing a plurality of permanent magnet segments with alternating polarizations.
  • the stator of the motor comprises at least three stator windings attached to the frame in such a way that the permanent magnet segments run past these stator windings when the rotor wheel rotates.
  • the object of the invention is to create a dehumidifying device belonging to the technical field mentioned at the beginning, which avoids the disadvantages mentioned, and in particular avoids or at least greatly reduces the generation of abrasion in the drive train and which at the same time improves sealing of the two air flows against each other and against the Environment guaranteed.
  • the drive of the dehumidifying element is arranged such that a driving force of the drive can be transmitted from the drive element in a center of the dehumidifying element to the dehumidifying element.
  • center means that the driving force does not act on the circumference of the dehumidifying element, but in its center.
  • the term center is to be understood broadly and denotes an area around that section of the dehumidifying element through which the axis of rotation of the dehumidifying element runs. In relation to the diameter of the dehumidifying element, however, the radial extent of this area is small.
  • the term center denotes the area of the wheel around its axis of rotation.
  • the hub of the wheel can be viewed as the center of the dehumidifying element.
  • This arrangement of the drive means that the driving force does not act on the dehumidifying element at the periphery of the latter, but rather in its center.
  • the distance between the point of application of the driving force and the axis of rotation about which the dehumidifying element rotates is greatly reduced or, in the optimal case, practically eliminated.
  • the forces acting on the dehumidifying element and thus also the distortion of the dehumidifying element are thus significantly reduced.
  • the dehumidifying element is deformed less and the sealing of the two air flows against one another and against the environment is improved. So the process air is less dirty, which is particularly advantageous in applications with high hygiene requirements such as in the food industry. But of course the regeneration air is also less polluted.
  • the drive could also be coupled to the dehumidifying element via a coupling in order to enable the drive to be decoupled. But in most cases a clutch is not necessary and should be omitted. A clutch would only increase the number of components and possibly also produce abrasion again.
  • the drive can be arranged in any way with respect to the dehumidifying element.
  • the drive could, for example, be arranged such that the axis of rotation of the drive element is arranged at an angle other than zero to the axis of rotation of the dehumidifying element.
  • the drive could, for example, comprise a bevel gear between the drive element and the dehumidifying element, so that the axis of rotation of the drive element is aligned at a right angle to the axis of rotation of the dehumidifying element.
  • the drive could be arranged such that the axis of rotation of the drive element is arranged parallel to the axis of rotation of the dehumidifying element, but at a distance from it.
  • An arrangement is even conceivable in which the drive, as in the prior art, is arranged outside the rotor or the housing.
  • the driving force of the drive would be transmitted to the center of the dehumidifying element via a gear mechanism, for example gear wheels, belts, chains, etc., and there to be transmitted to the dehumidifying element.
  • the transmission can be designed as a separate element in addition to a motor, such as with a Belt or chain is the case.
  • the motor comprises a housing into which a gear is integrated.
  • Such motors are often referred to as gear motors.
  • the output shaft of the gearbox forms the drive element, and in principle any gearbox can be used.
  • a gear is to be used, it is preferably a mechanical gear that is as simple as possible, such as a spur gear, coaxial or bevel gear.
  • the drive force must first be transmitted from the drive to the center of the dehumidifying element. Additional transmission components are required for this, which not only increase the number of necessary elements of the drive, but can also generate undesired abrasion again.
  • the drive is therefore preferably arranged such that the axis of rotation of the drive element is aligned coaxially to the axis of rotation of the dehumidifying element.
  • the drive force is transmitted from the drive to the dehumidifying element in the center of the dehumidifying element.
  • the dehumidifying element is fastened, for example, on a rotatably mounted shaft on which an element of the drive is fastened, for example a gearwheel, a belt pulley or another suitable element which is driven directly or indirectly by the drive.
  • an element of the drive for example a gearwheel, a belt pulley or another suitable element which is driven directly or indirectly by the drive.
  • the transmission of the driving force to the dehumidifying element consequently takes place via the rotating shaft, which in turn is driven by the element attached to it.
  • this element of the drive is not arranged on the shaft, but directly on the dehumidifying element, i. H. fixed but optionally releasably connected to it.
  • This is, for example, a gearwheel or a belt pulley, which is arranged coaxially with the dehumidifying element and is firmly connected to the latter and has a significantly smaller diameter than the dehumidifying element itself.
  • the dehumidifying element itself is then freely rotatable about its hub on an axis, this element and thus the dehumidifying element in turn being driven directly or indirectly by the drive.
  • the dehumidifying element is now asymmetrically connected to the shaft, if, for example, only a single driver is provided, or if the drive force from the drive is transmitted asymmetrically to the dehumidifying element, if, for example, the driving force is transmitted from a gear wheel to a gear wheel flanged to the dehumidifying element this leads to an irregular loading of the dehumidifying element and thus in turn to an undesirable distortion of the dehumidifying element.
  • Such a one-sided torque transmission could also load the shaft or the axle itself irregularly, as a result of which undesirable forces can be exerted on the bearings of the shaft.
  • the drive force from the drive element can therefore preferably be transmitted from the drive element to the dehumidification element symmetrically with respect to the axis of rotation of the dehumidifying element.
  • the dehumidifying element is therefore connected to the shaft, for example, at two or more points arranged symmetrically with respect to the axis of rotation of the dehumidifying element, so that the drive force is transmitted symmetrically to the dehumidifying element.
  • the dehumidifying element is connected to its hub, for example by means of a press fit, to the shaft.
  • other shaft-hub connections can also be used which ensure an essentially symmetrical transmission of force from the shaft to the dehumidifying element.
  • the dehumidifying element is basically freely rotatable on the shaft with its hub. And as an additional transmission element, for example, a gear wheel is flanged coaxially to the dehumidifying element, this gear wheel being driven by the drive via a planetary gear. A symmetrical power transmission from the drive to the dehumidifying element is also achieved in this way.
  • the dehumidifying element can in principle have any external shape.
  • it can be a regular polygon with three or more corners, such as a square or a regular hexagon or octagon.
  • it can also be an irregular polygon or it can even have a completely irregular external shape.
  • the axis of rotation about which the dehumidifying element rotates preferably runs through the center of gravity of the dehumidifying element, although this need not necessarily be the case.
  • the dehumidifying element rotates anyway during operation, it is preferably designed to be rotationally symmetrical with respect to the axis of rotation.
  • the axis of rotation also coincides with the axis of symmetry of the dehumidifying element and both run through the center of mass of the dehumidifying element. This also minimizes the energy required to drive the dehumidifying element.
  • the design of the dehumidifying element as a wheel offers the greatest advantages.
  • the diameter of the wheel is advantageously significantly greater than its thickness, i.e. H. its expansion in the axial direction.
  • Such dehumidifying elements are available in various sizes for such dehumidifying systems, as already mentioned.
  • the condensation principle can generally be used to dry the process air.
  • the dehumidifying element could be cooled so that the water contained in the air can be condensed and discharged as it flows through the dehumidifying element.
  • the process air is preferably dehumidified according to the sorption principle.
  • the dehumidifying element is preferably a sorbent, in particular an adsorbent.
  • the dehumidifying element is for example completely or at least partially coated with a sorbent.
  • the inside of the wheel is filled with a honeycomb structure made of an inorganic carrier material, the carrier material being coated with the sorbent. Sufficient space remains between the coated edges of the honeycomb so that the air can flow past it and be dehumidified in the process.
  • absorbents as well as adsorbents can be used as sorbents.
  • the use of adsorbents is preferred, since appropriate dehumidifying elements, which are coated with an adsorbent, are available in various sizes and optimized for use in such dehumidifying systems.
  • silica gel, zeolites, aluminum oxides, calcium or lithium chloride, potassium carbonate or even sodium or potassium hydroxide are used as adsorbents.
  • Certain adsorbents such as magnesium perchlorate, di-phosphorus pentoxide (P4O10) or concentrated sulfuric acid are unsuitable because they react in an undesirable way with the water absorbed.
  • silica gel also known as silica gel or silica gel. This is highly hygroscopic, easy to regenerate and available at low prices, which is why it is also used as an adsorbent in a preferred embodiment of the invention.
  • the drive is preferably arranged such that the axis of rotation of the drive element is coaxial to the axis of rotation of the dehumidifying element.
  • a transmission can also be provided in such a drive arrangement. That's how it is, for example possible to transmit the drive force by means of a coaxial gear, for example a planetary gear, from the drive to the dehumidifying element.
  • no gear is provided and the drive is designed as a direct drive. I.e. the drive and the dehumidifying element are connected to one another without a gear.
  • no gearbox is integrated into the housing of a motor, but the output axis or shaft of the motor is directly connected to the dehumidifying element.
  • the speed of the dehumidifying element is equal to the speed of the drive, in particular the drive element.
  • the axis of rotation about which the dehumidifying element rotates coincides with the output axis of the drive, i. H. the axis of rotation of the drive element, together.
  • the driving force of the drive is therefore direct, i.e. H. transferred to the dehumidifying element without stepping or stepping down.
  • the dehumidifying element can also be of a simpler design, since it no longer requires sensors to absorb the drive force from the gear.
  • any motor can be used as the motor of the direct drive.
  • a hydraulic motor or an internal combustion engine could be used.
  • such motors are unsuitable because they often require undesirable operating materials or generate exhaust gases which are typically undesirable in such industries.
  • the direct drive therefore comprises an electric motor.
  • the electricity required is provided in the vast majority Applications are not a problem and no undesirable exhaust gases or the like are produced.
  • the electric motor comprises a stator and a rotor, but no gearbox.
  • the stator is preferably connected to the housing of the dehumidifying device and the rotor to the dehumidifying element.
  • the rotor is rotatably mounted on the drive, the stator transmitting the driving force to the rotor without contact.
  • the motor is designed as an internal rotor, the rotor being connected to the shaft on which the dehumidifying element is firmly connected again.
  • the motor is designed as an external rotor, the rotor being firmly connected to the dehumidifying element, which in turn is freely rotatably mounted on an axis.
  • the driving force is transmitted to the center of the dehumidifying element.
  • the rotor is the component of the drive previously referred to as the rotatable drive element, which transmits the drive force of the drive to the center of the dehumidifying element and whose axis of rotation is aligned coaxially to the axis of rotation of the dehumidifying element.
  • the stator typically comprises electric or permanent magnets, which generate the stator field
  • the rotor is in the form of a disk and comprises the windings through which current flows, the electrical current being supplied via brushes .
  • the rotor comprises permanent magnets and the stator field is generated by appropriate windings.
  • the motor can be made brushless and abrasion can be avoided.
  • the rotor is firmly connected to the dehumidifying element, indirectly via a shaft or directly, and the drive force is also transmitted to the dehumidifying element in the center of the latter.
  • this preferably comprises a hub which is connected to the rotor of the drive.
  • An asynchronous motor for example, can be used as an electric motor for a direct drive, which is typically designed as a three-phase machine in which the stator generates a rotating magnetic field by means of a typically multiphase input current.
  • the rotor follows this rotating field asynchronously, which induces a voltage which, if the slip is small, produces a current that is proportional to the slip. This creates a torque that is proportional to the slip and drives the rotor.
  • asynchronous motors that can be operated in single phase.
  • a synchronous motor is used that is self-excited or externally excited.
  • Synchronous motors especially permanent magnet synchronous motors, can typically be made more compact and more efficient than corresponding asynchronous motors.
  • Synchronous motors are also more suitable than asynchronous motors for this application due to the rigid coupling of the speed to the operating frequency.
  • Synchronous motors are also particularly suitable for applications in which a load-independent, stable speed is required. They typically also have little play and can be precisely controlled accordingly.
  • a rotating magnetic field is in turn generated by the stator, which the rotor follows synchronously, the rotor following the rotating field by a certain angle when the load is applied, the higher the load torque, the higher the angle.
  • the torque generated in this way is transmitted to the rotor and drives it.
  • the dehumidifying device In such a synchronous motor, the speed of the rotor depends on the frequency of the rotating field generated in the stator.
  • the dehumidifying device therefore preferably comprises a controllable frequency converter which supplies the electrical power for operating the synchronous motor.
  • the frequency converter is controlled accordingly so that it supplies the energy supply signal with the frequency required for the resulting speed.
  • the dehumidifying device therefore advantageously also includes a controller which controls the output frequency of the frequency converter as required.
  • the dehumidifying element can, for example, also be moved very slowly, positioned exactly and held in position.
  • the assembly of the dehumidifying element which typically consists of several individual parts, it can be positioned precisely and safely so that each of the individual parts can be conveniently and safely assembled until the entire dehumidifying element is assembled. The same naturally applies to commissioning and maintenance.
  • Another advantage is the lower space requirement when the motor is integrated into the dehumidifying element or mounted on its shaft.
  • Such a drive can also be delivered preassembled on or in the dehumidifying element to the location of the dehumidifying device, which in turn reduces the assembly effort when the system is started up.
  • the electric motor is designed as a torque motor.
  • Electric motors are referred to as torque motors, also known as torque motors, which typically run slowly and deliver high torques at low speeds.
  • Such torque motors typically have a high drive rigidity and no torsional backlash.
  • the reduced disturbance variables make it easier and more precise to control systems that are driven by such motors.
  • Torque motors can be flexibly optimized for all power ranges, required torques and speeds.
  • the motor can also be equipped with a temperature monitoring module to ensure the necessary protection if the motor temperature rises. This can be the case in particular in applications at the engine power limit, for example at low speeds or in standstill operation, such as can be used for installation and maintenance purposes.
  • passive cooling of the motor can be sufficient.
  • active cooling can of course also be provided, for example water cooling.
  • a synchronous motor can be self-excited or externally excited.
  • the magnetic field required on the rotor is generated, for example, in that field coils on the rotor are electromagnetically excited by external means.
  • slip rings are required, which establish the electrical contact between the coils on the rotor and the external exciter. This in turn can lead to undesired abrasion.
  • the synchronous motor is therefore permanently excited.
  • the rotor comprises permanent magnets which generate the field on the rotor.
  • the dehumidifying device comprises a housing with a flow path through which the gaseous substance flows.
  • This flow path is typically a type of channel within the housing which extends essentially in the axial direction with respect to the axis of rotation of the dehumidifying element, at least in the area of the dehumidifying element.
  • a direction of flow of the gaseous substance along the flow path in a region of the dehumidifying element is preferably essentially parallel to the axis of rotation of the dehumidifying element.
  • the dehumidifying device preferably also comprises a bearing arrangement for rotationally mounting the dehumidifying element.
  • a bearing arrangement for rotationally mounting the dehumidifying element.
  • the rotation speed is, for example, in the range of approximately 5 to 30 revolutions per hour.
  • the speed of rotation can of course also be significantly above or below these values.
  • the size of the dehumidifying wheel can also have an influence on the speed, the speed typically being lower the larger the dehumidifying wheel.
  • the dehumidifying device advantageously comprises a fan. This is typically also arranged in the flow path, wherein it can be arranged both before and after the dehumidifying element in the flow direction.
  • the gaseous substance can also be fed to the dehumidifying device via pipes or hoses at the necessary flow rate. I.e. the gaseous substance is required outside the dehumidifier Accelerated flow rate, so that a fan or the like can be dispensed with within the dehumidifying device.
  • the driving force of the drive is transmitted to the dehumidifying element in a central area of the dehumidifying element.
  • the dehumidifying element is preferably rotated around the axis of rotation with a direct drive.
  • FIG. 1 shows a dehumidifying system 1 according to the prior art.
  • the housing of the dehumidifying system 1 is not shown for the sake of simplicity.
  • the dehumidifying system 1 comprises a dehumidifying rotor 13 and a motor 19 which drives the dehumidifying rotor 13 via a belt 20, it being understood that a chain can also be used instead of a belt.
  • the dehumidification rotor 13 is filled with a honeycomb structure (not shown) made of inorganic fibers, which is coated with silica gel, for example.
  • the area in front of and behind the dehumidification rotor 13 is divided into two sectors 15 and 16 by the indicated walls 17.
  • a moist air flow 2 is passed through the dehumidification rotor 13 via a filter 9, a cooler 10 and a UV system 8 in the area of the sector 15.
  • the moist air stream 2 is dehumidified. Since the dehumidifying rotor 13 rotates, the moist air flow 2 in the area of the sector 15 flows through a different area of the honeycomb structure, which, as described below, has been regenerated beforehand, i.e. has been dehumidified in turn.
  • the dehumidification system 1 is in operation, there is in each case an area of the dehumidification rotor 13 with dry silica gel in sector 15, which area is correspondingly ready to absorb water from the moist air flow 2.
  • the moist air flow 2 is dehumidified accordingly in the area of the sector 15 and is passed as a dry air flow 3 over a cooler 10 and finally provided by a fan 11 as a process air flow 4 for further use, for example for the production of milk powder.
  • the silica gel which has absorbed moisture from the moist air stream 2 after it has passed through the sector 15 is regenerated again; H. dehumidified. This happens in the area of the sector 16.
  • the dehumidifying rotor 13 with the moist silica gel continues to rotate and passes through the sector 16.
  • a regeneration air stream 5 is passed through the dehumidifying rotor 13 in the area of the sector 16, whereby the regeneration air stream 5 has previously been passed through a filter 9 and a heater 7.
  • the silica gel releases the previously absorbed moisture to the regeneration air stream 5, which is released again as moist exhaust air 6 by a fan 11 arranged downstream of the dehumidification rotor 13 in the direction of flow.
  • the dehumidifying rotor 13 In order to prevent the moist air flow 2 from mixing with the exhaust air 6, these two air flows are sealed from one another by radial seals on the walls 17. On the other side of the dehumidifying rotor 13, the dry air flow 3 and the regeneration air flow 5 are also sealed off from one another by radial seals. In addition, the dehumidifying rotor 13 itself is sealed off from the housing (not shown) so that, on the one hand, the air flows in front of and behind the dehumidifying rotor 13 do not mix and, on the other hand, no air or other substances unintentionally get into one of the air flows. These seals are not shown.
  • the belt 20 must either be passed through the housing of the dehumidifying system 1. Seals are then accordingly also required which seal these openings for the belt 20.
  • the dehumidifying rotor 13 is provided on both sides with a partition which closes the area outside the dehumidifying rotor 13 up to the housing walls, but leaves the openings free for the air flows. In this case, the dehumidifying rotor 13 must be sealed on both sides with respect to these partition walls. This design is particularly preferred if the dehumidifying rotor 13 is to be able to be removed from the dehumidifying system 1 in a simple manner. In this case, the dehumidification rotor 13 is integrated in a module that can be removed from the side and which is equipped with corresponding sealed partition walls on both sides.
  • the motor 19 typically an electric motor with brushes, generates abrasion during operation.
  • abrasion occurs through the belt 20, which revolves on the one hand on the drive shaft of the motor 19 and on the other hand on the circumference of the dehumidifying rotor 13. If the seals along the circumference of the dehumidifying rotor 13 are not completely tight, this abrasion can get into the moist air flow 2 or the dry air flow 3 and thus contaminate the process air flow 4.
  • the dehumidifying system 1 can also include additional elements.
  • the filters 9, the cooler 10, the UV system 8 or the heater 7 can be omitted, for example.
  • the fans are typically necessary.
  • the dehumidifying system 1 can include, for example, a recuperation system for heat recovery.
  • the invention now relates in particular to the drive of the dehumidifying rotor 13 and, depending on the specific configuration of the drive, the dehumidifying rotor 13 can also be configured differently in the invention.
  • Figures 2, 3 and 4 show a schematically illustrated first embodiment of the invention.
  • Figure 2 shows the first embodiment in a side view
  • Figure 3 shows an enlarged representation of a section from Figure 2
  • Figure 4 shows a schematic representation of the drive from Figure 2 in the axial direction of view.
  • the illustration shows the dehumidification rotor 13, which is arranged in a housing with a floor 25 and a ceiling 26.
  • the dehumidifying rotor 13 is let into a partition wall 27 which separates the areas in front of and behind the dehumidifying rotor 13 from one another.
  • the dehumidifying rotor 13 is sealed off from the partition 27 by a seal 28.
  • the dehumidifying rotor 13 is attached to a shaft 30 which is mounted on a support 31 in front of and behind the dehumidifying rotor 13.
  • the supports 31 are firmly connected to the housing of the dehumidifying system.
  • the carriers 31 are connected to the floor 25, for example anchored therein.
  • the supports 31 can also be attached to the ceiling or a side wall of the dehumidifying system. This also applies to the exemplary embodiments of the invention described below.
  • the two bearings 33 are designed as rotary bearings, for example as ball or roller bearings, which enable the shaft 30 to rotate about its axis and thus to rotate the dehumidifying rotor 13 about its axis.
  • the drive of the dehumidifying rotor 13 comprises a motor 34 which is fastened or mounted on one of the supports 31.
  • the motor 34 is, for example, a synchronous motor with a stator 36 and a rotor 37 with permanent magnets.
  • the rotating field generated by the windings of the stator sets the rotor with its permanent magnets in rotation.
  • the motor 34 is designed as an internal rotor.
  • the stator 36 of the motor 34 is connected to the motor housing, which in turn is firmly connected to one of the supports 31, in the example shown via corresponding screw connections 35.
  • the rotor 37 in turn is firmly connected to the shaft 30, for example flanged to it.
  • screw connections 35 are shown, which are symmetrical with respect to the axis of rotation, i. H. the shaft 30 are arranged.
  • more or fewer screw connections 35 can also be provided which firmly connect the motor housing or the stator 36 to one of the supports 31.
  • Two or more screw connections 35 are preferably provided, which are each arranged symmetrically with respect to the shaft 30.
  • the rotor 37 of the motor 34 consequently rotates within the stator 36 and in this way sets the shaft 30 together with the dehumidification rotor 13 in rotation about the common axis of rotation of the shaft 30.
  • the motor 34 thus transmits its driving force via the shaft 30 to the dehumidifying rotor 13, and thus in the center of the dehumidifying rotor 13. This reduces the drive-related delay of the dehumidifying rotor 13 and the tightness of the system can be better maintained.
  • the motor 34 could also be designed as a geared motor. This means that it would not only include the electric motor itself, but also a gearbox in the same housing.
  • the transmission could be a bevel gear, for example, with a first bevel gear firmly connected to the rotor of the motor and the axis of a second bevel gear, which is arranged perpendicular to the first, would then be firmly connected to the shaft 33, for example flanged to it.
  • the housing of the motor is as in FIG Figure 2 shown, firmly connected to one of the carriers 31.
  • Figures 5, 6 and 7 show a schematically illustrated second embodiment of the invention.
  • Figure 5 shows the second embodiment in a side view
  • Figure 6 shows an enlarged representation of a section from Figure 5
  • Figure 7 shows a schematic representation of the drive from Figure 5 in the axial direction of view.
  • the dehumidifying rotor 13 is arranged on a partition wall 27 which separates the areas in front of and behind the dehumidifying rotor 13 from one another.
  • the dehumidifying rotor 13 is sealed off from the partition 27 by a seal 28.
  • the seal 28 is designed, for example, as a lip seal, which is arranged on the dehumidification rotor 13 and rotates with it past the partition wall 27.
  • the dehumidification rotor 13 is fastened freely rotatably on an axis 30 ′ by means of two bearings 33.
  • the axis 30 ' is firmly connected to a carrier 31 in front of and behind the dehumidification rotor 13.
  • the carriers 31 are in turn firmly connected to the floor 25.
  • the bearings 33 are in turn designed as rotary bearings, for example as ball or roller bearings, and are integrated into the dehumidifying rotor 13.
  • the drive of the dehumidifying rotor 13 comprises a motor 34 which is integrated in the dehumidifying rotor 13.
  • the motor 34 is, for example, a synchronous motor with a stator 36 and a rotor 37 with permanent magnets.
  • the rotating field generated by the windings of the stator sets the rotor with its permanent magnets in rotation.
  • the motor 34 is designed as an external rotor.
  • the stator 36 of the motor 34 is firmly connected to the axis 30 '.
  • the axis 30 ' can also be used directly as the stator of the motor.
  • the rotor 37 is in turn firmly connected to the dehumidifying rotor 13.
  • the rotor 37 of the motor 34 consequently rotates around the stator 36 and in this way sets the dehumidification rotor 13 in rotation about the axis 30 ′, which is firmly connected to the supports 31.
  • Figures 8, 9 and 10 show a schematically illustrated third embodiment of the invention.
  • Figure 8 shows the third embodiment in a side view
  • figure 9 shows an enlarged representation of a section from Figure 8
  • Figure 10 shows a schematic representation of the drive from Figure 8 in the axial direction of view.
  • This third embodiment is similar to the second.
  • the motor 34 which in turn is designed as an electric motor with a stator 36 and a rotor 37, is also integrated into the dehumidifying rotor 13.
  • the difference to the second embodiment is that the motor is designed as an internal rotor.
  • it is again a synchronous motor with stator 36 and rotor 37 with permanent magnets, the stator 36 in turn being firmly connected to one of the supports 31, for example by means of screw connections 35.
  • 6 screw connections 35 are shown, with more or fewer screw connections 35 being provided can.
  • the supports 31 are firmly connected to the floor 25.
  • the rotor 37 is firmly connected to the axle 30 ′, which in this example is freely rotatably mounted in bearings 33 in or on the supports 31.
  • the axis 30 ' is firmly connected to the dehumidification rotor 13 and the rotor 37 of the motor 34.
  • the bearings 33 could also be arranged on the dehumidifying rotor 13, the rotor being firmly connected to the dehumidifying rotor 13, but not to the axis 30 '.
  • the dehumidifying rotor 13 would then rotate freely on the axis 30 ′ in the bearings 33, driven by the rotating field generated by the stator 36.
  • the dehumidifying rotor 13 is set in rotation by the motor 34 during operation, the drive force of the motor 34 being transmitted directly to the axis 30 ′ and thus to the center of the dehumidifying rotor 13.
  • Figures 11, 12 and 13 show a schematically illustrated fourth embodiment of the invention.
  • Figure 11 shows the fourth embodiment in a side view
  • Figure 12 shows an enlarged representation of a section from Figure 11
  • Figure 13 shows a schematic representation of the drive from Figure 11 in the axial direction of view.
  • the motor 34 which in turn is designed as an electric motor with stator 36 and rotor 37, is outside the Dehumidifying rotor 13 arranged.
  • the motor 34 is again, for example, a synchronous motor with permanent magnets.
  • the motor 34 is designed as an external rotor.
  • the stator 36 is fixedly connected to an axle 30 ′, which is again fixedly connected to the carriers 31.
  • the carriers 31 are in turn firmly connected to the floor 25.
  • the rotor 37 is firmly connected to the dehumidifying rotor 13, here again by means of screw connections 35 and the dehumidifying rotor 13 comprises bearings 33, by means of which the dehumidifying rotor 13 is freely rotatably mounted on the axis 30 '.
  • the bearings 33 are accordingly in turn designed as rotary bearings, for example as ball bearings or roller bearings.
  • the rotor 37 consequently rotates around the stator 36, which is fixedly connected to the axis 30 'and the carriers 31, and in this way sets the dehumidification rotor 13 in rotation around the common axis 30'.
  • the motor 34 transmits its driving force via the screw connections 35 to the dehumidification rotor 13, specifically in its center.
  • Figure 14 shows a schematically illustrated fifth embodiment of the invention in the axial viewing direction.
  • the dehumidification rotor 13 is shown, which is fastened to supports 31, which in turn are firmly connected to the floor 25.
  • the motor 34 is also firmly connected to the floor 25, for example anchored to the floor 25, and comprises a pinion 39.
  • a belt pulley 40 is also arranged coaxially with the dehumidification rotor 13, both of which are fastened on a shaft 30.
  • the shaft 30 is freely rotatably supported in bearings 33 in the carriers 31.
  • the driving force of the motor 34 is now transmitted to the belt pulley 40 and thus to the shaft 30 and correspondingly to the dehumidifying rotor 13 and this is set in rotation.
  • the belt pulley and the dehumidifying rotor 13 can also be firmly connected to one another, so that the drive force is transmitted from the belt pulley 40 directly to the dehumidifying rotor 13 without going through the shaft 30.
  • the driving force of the motor 34 is thus transmitted to the shaft 30 and thus in the center of the dehumidifying rotor 13 to the latter.
  • the motor can in principle also be a conventional electric motor with carbon brushes, depending on the specific application.
  • the abrasion of the motor and the belt drive can be accepted, depending on the application, since the arrangement of the drive or its power transmission to the dehumidification rotor in its center ensures increased tightness and abrasion cannot get into the process air, or only in acceptable quantities.
  • the motor 34 is preferably a synchronous motor with permanent magnets.
  • Figure 15 shows a schematically shown sixth embodiment of the invention in the axial viewing direction.
  • the sixth embodiment is similar to the fifth.
  • the motor 34 is not attached to the floor 25, but to one of the supports 31.
  • the motor 34 in turn comprises a pinion 39 and the dehumidifying rotor 13 is attached to a shaft 30.
  • a gear wheel 41 is also fastened on the shaft 30, the shaft 30 in turn being freely rotatably supported in bearings 33 in the carriers 31.
  • the motor 34 is now attached to one of the carriers 31 in such a way that the pinion 39 engages in the gear 41 and drives it during operation.
  • the driving force of the motor is transmitted via the shaft 30 to the dehumidifying rotor 13 and this is set in rotation.
  • the gear wheel 41 can be directly connected to the dehumidification rotor 13, so that the drive force is transmitted from the gear wheel 41 directly to the dehumidification rotor 13 without going via the shaft 30.
  • the driving force of the motor 34 is transmitted to the dehumidifying rotor 13 in the center of the latter.
  • the motor is preferably a synchronous motor with permanent magnets. Due to the improved tightness of the system, it can also be a conventional electric motor with carbon brushes.
  • the terms "firmly connected” or “attached” used above should not be understood to mean that the two connected elements could not be separated from one another. Rather, there is a fixed connection between the two elements in the sense that forces or torques can be transmitted.
  • the force or torque transmission is typically designed mechanically as a form fit, force fit or material fit, but can in principle also take place in other ways, for example electrically, hydraulically or pneumatically.
  • the two elements can, however, be separable from one another without any damage.
  • the design of the motor used must be tailored to the specific application.
  • the drive can be optimized accordingly. For example, it can be adjusted to a higher speed with a lower torque or also for a high torque and low speeds.
  • a frequency converter that may be present and which enables the dehumidifying system to be operated at different speeds of the dehumidifying rotor is not shown in the figures. Also not shown is the controller, which, among other things, takes over the control and / or regulation of the speed of the dehumidifying rotor, with a large number of parameters and measured values such as the current temperatures, moisture content of the air supplied, the regeneration air and / or the air to be processed Product can be considered. Different operating states can also be implemented with a frequency converter and a corresponding controller. For example, the dehumidifying rotor can be held in a certain position for assembly or maintenance work.
  • the power supply for the motors is also not shown in the figures. This is done in a simple manner by means of appropriate power cables which are led into the housing of the dehumidifying device and there to the motor.
  • the power cable is preferably integrated into the carrier and fed directly through an opening in the carrier, which is located in the area of the motor.
  • the power cable can also be inserted through the axis or shaft the dehumidification rotor and the motor. The hidden, integrated feed of the power cable can prevent the various air currents from coming into contact with the motor's power supply.
  • bearings are provided in all the exemplary embodiments, typically rotary bearings, which absorb the forces generated by the dehumidifying rotor.
  • such bearings can also be dispensed with, since the mounting of the dehumidifying rotor can also be taken over by the motor 34, for example in the form of magnetic bearings. This is possible in particular when the dehumidifying rotor has a low weight.
  • the invention makes it possible to create a dehumidifying device which has an increased tightness compared to the known dehumidifying devices, so that abrasion or other contaminants cannot penetrate the air flows within the dehumidifying device, or only to a significantly reduced extent.
  • the various air flows within the system are also better separated from one another and the system can be operated more efficiently.
  • undesired abrasion can also be practically eliminated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)
  • Central Air Conditioning (AREA)
EP19191097.5A 2019-08-09 2019-08-09 Dispositif déshumidificateur et procédé de déshumidification Withdrawn EP3772623A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19191097.5A EP3772623A1 (fr) 2019-08-09 2019-08-09 Dispositif déshumidificateur et procédé de déshumidification
PCT/EP2020/072299 WO2021028357A1 (fr) 2019-08-09 2020-08-07 Système de déshumidification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19191097.5A EP3772623A1 (fr) 2019-08-09 2019-08-09 Dispositif déshumidificateur et procédé de déshumidification

Publications (1)

Publication Number Publication Date
EP3772623A1 true EP3772623A1 (fr) 2021-02-10

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EP (1) EP3772623A1 (fr)
WO (1) WO2021028357A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1265733A (zh) * 1997-10-09 2000-09-06 株式会社荏原制作所 除湿空调装置
JP2001137325A (ja) * 1999-11-16 2001-05-22 Daikin Ind Ltd 空気浄化装置及び空気調和システム
JP2001289464A (ja) * 2000-04-10 2001-10-19 Sharp Corp 調湿機
US20070273240A1 (en) 2006-01-19 2007-11-29 Steele Donald F System for and method of rotating wheels in rotary air-to-air energy recovery and desiccant dehumidification systems
US20170227241A1 (en) 2014-08-05 2017-08-10 Corroventa Avfuktning Ab Method and device for dehumidification

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196469B1 (en) * 1999-07-28 2001-03-06 Frederick J Pearson Energy recycling air handling system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1265733A (zh) * 1997-10-09 2000-09-06 株式会社荏原制作所 除湿空调装置
JP2001137325A (ja) * 1999-11-16 2001-05-22 Daikin Ind Ltd 空気浄化装置及び空気調和システム
JP2001289464A (ja) * 2000-04-10 2001-10-19 Sharp Corp 調湿機
US20070273240A1 (en) 2006-01-19 2007-11-29 Steele Donald F System for and method of rotating wheels in rotary air-to-air energy recovery and desiccant dehumidification systems
US20170227241A1 (en) 2014-08-05 2017-08-10 Corroventa Avfuktning Ab Method and device for dehumidification

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