• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    16-03-23 12: 06 FROM- ^ T-OOB POOl 4/0025 F-008 12 SEWING SUMMARY Device and method of checking the air leakage at a rotary heat recovery unit (3) arranged in an air treatment unit (4), which rotating heat recovery unit (3) ) comprises axially mounted and rotatable rotor (5). The rotor (5) is arranged in an enclosing rotor chamber (6), which rotor chamber (6) comprises an air volume (16) surrounding the rotor (5). The invention is characterized in that the pressure of the air volume (16) in the rotor chamber (6) is ensured to always be equal, or at least almost equal to the pressure in an outdoor air chamber (25), by the entry pressure equalizing device (27) equalizing the pressures between the chambers (6, 25). This together with ensuring that the pressure in the outdoor air chamber (25) is the highest pressure, by controlling and reacting the air inside the air chamber (4) with measuring devices and control equipment to ensure that the pressure in the outdoor air chamber (25) is the highest pressure at all operating points, the possible leakage around the rotor (5) always taking place from the rotor chamber (6) in the direction of the other chambers (21, 22, 26). Figure 1.
    公开号:SE1550823A1
    申请号:SE1550823
    申请日:2015-06-16
    公开日:2016-12-17
    发明作者:Jakobsson Anders
    申请人:Fläkt Woods AB；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present invention relates to a rotary heat recovery unit arranged in an air treatment unit, and the handling of the leaking circulating air flow in the air. rotary heat recovery.
    Background of the Invention In the air treatment technology, there are a variety of solutions for preventing leakage around a rotary heat exchanger arranged in an air treatment unit. The rotary heat exchanger is a particularly efficient variant of heat recovery device for energy exchange between two air streams, but precisely because the rotating part itself - the rotor - rotates, the rotor must have a certain play / play towards the surrounding surfaces and partition walls and the like. The spaces in the air treatment unit are sealed in relation to each other because it is desired to avoid, for example, the exhaust air from a room being mixed with the fresh air to the room, which air then has a poorer quality. To minimize leakage around the rotor, a brush seal, or other edge seal that can withstand wear, is usually provided on the rotor or surrounding sweeping surfaces, which enclose the rotor periphery and connect to internal aggregate surfaces. Furthermore, the sweeping plates are in turn sealed against surrounding inner surfaces leak around these. Due to the movable part - the rotor - it is in principle impossible to completely avoid leakage, it is important that the pressure set in the unit is controlled so that the leakage flow that occurs, and which does not want to be avoided, so that the saw is eaten correctly, ie. that supply air may leak to the exhaust air but not the other way around. This is known technology and has been used for a long time. Furthermore, there is also a so-called purge sector connection to the part of the rotor where the rotor, when rotating, so to speak rotates in from the exhaust air side to the supply air side. The purge sector is a short circuit between the supply and supply air side which, due to the pressure difference between supply air (higher pressure) and exhaust air (lower pressure), blows exhaust air out of the ducts in the sector before they enter the supply air_ Focus on the current solutions has been in different ways find good seals, which is why solutions regarding peripheral sealing and sealing between the internal surfaces of the air handling unit and partition walls against the rotating rotor have been developed. For example, there are various forms of labyrinth seals, whose task is to ensure a high pressure drop on the leakage air path past the gasket, through a more or less advanced geometry of the gasket. The pressure drop should then counteract the leakage flow around the rotating rotor as much as possible. Another known solution is presented in US 7,849,913 B2, where the focus is instead on handling the pressure conditions around the rotor. The leakage problem in this case has been solved by enclosing the rotor ”16-03-23 1 2:06 FROM- ^ T-OOS POO16 / OO25 F-OOS in a rotor housing arranged with a front wall and a rear wall, which have a respective opening for the front surface. respectively the rear surface of the rotor wheel to enable flow through the rotor in the usual manner. Around the edges of the openings in connection with the periphery of the rotor wheel, some form of conventional gasket is arranged and the rotor housing itself is sealed / closed to other surfaces and thus a space with a basically closed air volume around the rotor has been created. The leakage that becomes a skerry around the rotor periphery and in connection with the assignment between the upper and lower half of the rotor / unit. The space around the rotor is connected in the American application to a pressurizing source, which by adding external air to the space always ensures that the prevailing pressure around the rotor is higher than any other pressure on the air passing through the rotor from the parts of the air handling unit connecting to the rotor. This is done by monitoring the pressures in the unit and in the rotor housing, and regulating the pressurizing source. The device is aimed primarily at plant explosive environments, and it is pointed out that the pressure around the rotor must be kept higher than the pressure on the gas / air flows through the rotor, in order to ensure that any leakage occurs with air from the pressurizing source, which "pumps" in clean air in the rotor housing. There is also talk of using temperature monitoring and heating of the external air that supply the pressurizing source. However, this solution is energy-intensive as it is constantly supplied with external air, and the plant requires equipment arranged for this as well as measuring and regulating equipment, monitoring equipment etc., in addition to the usual pressure and temperature sensors, and control devices that are otherwise needed during normal operation of a conventional air handling unit. .
    Disclosure of the Invention The present invention achieves the object of solving the above problems by means of an air treatment device according to the preamble of claim 1, wherein a rotor at a rotary heat recovery is enclosed by a casing - a rotor chamber - which is sealed both to the periphery of the motor rotor and to the surrounding inner surface. air handling unit in which the rotating heat recovery unit is located. Thereby an air volume is formed around the rotor. The device is characterized in that it comprises a pressure equalization device arranged between the rotor chamber, with its air volume, and an outdoor air chamber. Since the rotor rotates, there must be a play against close-fitting partition walls in the unit and counter-connecting cover plates, which at all rotating heat exchangers must be around the rotor periphery to force the air to pass through the rotor ducts. These gaps are minimized with different types of gaskets, but as previously described, it is impossible to prevent certain leakage. The invention therefore addresses the problem by ensuring that the leaking air leaks from the air volume of the rotor chamber and out of the rotor chamber through the correct pressure balance, i.e. "in the right direction", whereby no contaminated exhaust air can leak into the air and also '16-03-23 12 : 06 FROM- ^ T-OOS POOl7 / O025 F-OO8 only the cleanest air is allowed to leak, ie the outdoor air. This is done by adjusting the unit by conventional devices such as throttle plates and / or dampers and the like, so that the pressure in the outdoor air chamber before the rotating heat recovery is higher than all other pressures surrounding the heat recovery, and that a pressure equalizing device equals the pressure in the rotor chamber. These two pressures are at least almost equal, but may differ slightly due to a possible small pressure drop in connection with the pressure equalization device. The leaking air around the rotor is of course minimized in a conventional manner since the leaking air is in no way desirable. In this way different forms of advanced "labyrinth seals" are not needed, simpler seals can be used around the rotor and the rotor chamber. Furthermore, no external pressure sources and additional monitoring equipment (in addition to the conventional ones which may still be needed for operation and control of the plant) are needed, but a very single pressure equalization device replaces these energy- and maintenance-demanding devices. Furthermore, it is entirely possible and desirable that the above-described purification section connected / short-circuited to the rotor chamber, this also receiving the same pressure as the rotor chamber.
    According to a preferred embodiment of the device, a number of measuring devices are placed in the air treatment unit to register the pressures to be monitored so that an associated control equipment, on the basis of the measured pressures, ensures that the pressure in the outdoor air chamber is the highest. By, for example, controlling the supply and exhaust air fan, the pressures in the unit are balanced so that the outdoor air chamber has the highest pressure, in relation to the other chambers surrounding the rotor chamber, whereby the rotor chamber air volumes also basically the same pressure through the pressure equalizer. direction out of the rotor chamber, which prevents contaminated exhaust air from penetrating the inlet air. Thus, no external pressurizing sources are needed, as in older solutions without the control equipment, the pressures balance the unit for handling the leakage flow, for the correct pressurization of, among other things, the outdoor air chamber and thus also the rotor chamber.
    According to a further preferred embodiment, at least one damper is arranged in the second air stream to provide further possibility for regulating and balancing the pressure drops in the unit and around the rotating heat recovery.
    According to a preferred embodiment, the pressure equalization device in its simplest form consists of a heel in the front wall of the rotor chamber, i.e. in the front wall the intermediate rotor chamber and the outdoor air chamber. This is a very simple and cost-effective ”16-03-23 l 2:06 FROM- 1 T-OOS POOl 8/0025 F-OO8 solution that is suitable for most cases, when the room with the highest pressure and the purest air - the outdoor air chamber - is arranged in direct connection with the rotor chamber. By simple holding, a pressure equalization device has been provided which is sufficient to ensure that the sealed rotor chamber has in principle as high a pressure as the outdoor air chamber and higher pressure than other surrounding spaces, whereby the leakage flow is controlled to the "correct hob". and the simplicity very advantageous in the present solution.
    According to an alternative embodiment of the device, the pressure equalization device consists of a suitably dimensioned hose which connects / short-circuits the pressure set between the outdoor air chamber and the rotor chamber, in that the hose is connected with one end of the rotor chamber and its other end in the outdoor air chamber. This may be necessary for solutions where the outdoor air chamber and the rotor chamber are not arranged next to each other, but one still wants to use the simple solution that the pressure equalization allows.
    According to an alternative embodiment of the device, the pressure equalization device consists of a suitably dimensioned pipe which connects / short-circuits the pressure set-up between the outdoor air chamber and the rotor chamber, in that the pipe is connected with one end of the rotor chamber and its other end in the outdoor air chamber. In the same way as almost above, this solution may be suitable if the pressure equalization between the outdoor air chamber and the rotor chamber must take place even though they are located at a distance from each other.
    According to a preferred embodiment of the device, the rotor chamber is designed as a complete housing part, which in that case comprises both the so-called front wall and the rear wall, which cover the exhaust air treatment unit, so to speak, between the periphery of the rotor and surrounding inner surfaces. The housing part further also comprises four ends arranged around the rotor in its longitudinal extent and connecting to the front wall and the rear wall, so that the complete housing part encloses the rotor, but with openings in the front wall and the rear wall for flowing exhaust air flow and outdoor air flow through the rotor. and is installed as a part which is sealed against the environment and which in its front wall comprises the pressure equalization device.
    From a second aspect of the invention, the object is achieved in solving the above problems by a method of checking the leakage of a rotary heat recovery in an air handling unit according to the preamble of claim 8, wherein a rotor in a rotating heat recovery is enclosed by a housing - a rotor chamber omgerrotorn. The invented method therefore takes care of the problems described above by ensuring that the leaking air leaks from the air volume of the rotor chamber and out of the rotor chamber through a pressure balance, "16-03-23 12:06 FROM- ^ T-OOB POOl9 / OO25 F-OO8 that is, "eat in the right direction", whereby no contaminated exhaust air can leak into the indoor air and in addition, only the cleanest air is allowed to leak, ie the outdoor air. This is done by adjusting the unit so that the pressure in the outdoor air chamber inside the rotating heat recovery unit is higher than all other pressures, which the ambient heat recovery unit, and that a pressure equalization device ensures that the pressure in the rotor chamber is equal to the pressure in the outdoor air chamber. These two pressures are at least almost equal, but may differ slightly due to a possible small pressure drop in connection with the pressure equalization device. The leaking air around the rotor is of course minimized in a conventional manner because the leaking air is in no way desirable. In this way, different forms of advanced "labyrinth seals" are not needed, but simpler seals can be used around the rotor and the rotor chamber if desired.
    According to a preferred embodiment of the invented method, it is ensured that the maximum pressure is always present in the outdoor air chamber and thus also in the rotor chamber at all operating points of the air handling unit by registering the pressures in certain parts of the unit and regulating the pressures so that this criterion is always met.
    Through the invention, a number of advantages have been obtained over prior art.
    - Ensuring that the leakage air flow is minimal and leaks, so to speak, in the right direction.
    - No need for advanced gaskets without conventional rotor gaskets can be used.
    - Simple and cost-effective solution without high installation and operating costs.
    - Simple pressure equalization between outdoor air chambers and rotor chambers, even if these are located at a distance from each other.
    Brief description of the figures The following schematic principle figures show; Fig. 1 shows a basic view of an air treatment unit 4 with a rotary heat recovery unit 3, according to the invention and an enlargement showing an entry equalization device 27, which cross-links the air between an outdoor air chamber 25 in the air treatment unit 4 and an air volume 16 in a rotor chamber 6 at the rotary heat recovery unit Fig. 2 shows a variant of a rotating heat recovery unit 3, designed as a complete casing part 29 and comprising the pressure equalization device 27 in the form of a slat in a front wall 7 of the casing part 29. "16-03-23 12:06 FROM - T-OOS POO20 / OO25 The design of the present invention appears in the following detailed description of an embodiment of the invention with reference to the accompanying figures which show a preferred, but not limiting, embodiment of the invention.
    Detailed description of the figures Fig. 1 shows a basic view of an air treatment unit 4 with a rotary heat recovery unit 3. The air treatment unit 4 comprises a supply air fan 1 arranged in a first air stream 17 and an exhaust air fan 2 arranged in a second air stream 18. The rotary heat recovery unit 3 is arranged to transmit energy between the first and the second air stream 17, 18. The first air stream 17 sucks in outdoor air 23, which preferably passes a damper 28 and a filter 32 before arriving at an outdoor air chamber 25, after which it passes through the rotor 5 of the rotating heat recovery unit 3, in a conventional manner. that the air has passed the rotor 6, it is called supply air 24 and thus arrives at a single air chamber 26, to then pass the supply air fan 1 and out of the air treatment unit 4 as supply air 24. The second air stream 18 sucks in exhaust air 19, which preferably passes damper 31 and a filter 32 before arrives an exhaust air chamber 21, va then passes through the rotor 5 of the rotary heat recovery 3, in a conventional manner. After the air has passed the rotor 5, it is called exhaust air 20 and thus arrives at an exhaust chamber 22, to then pass the exhaust air fan 2 and out of the air treatment unit 4 as exhaust air20. All this is done in a conventional way and with conventional technology. What characterizes the invention is that the rotor 5 is arranged in a rotor chamber 6, which is sealed opposite surfaces 14 in the air treatment assembly 4, preferably through the rotor chamber 6 consisting of a front wall 7 and a rear wall 8, which are sealed with the inner surfaces 14 of the counter air treatment assembly 4. edge seals 15, while the periphery of the intermediate rotor 5 and the front wall 7 and rear wall 8 adjoining the periphery are arranged peripheral seals 13 in a conventional manner. These can be, for example, in the form of brush seals or other forms of seals. The front wall 7 and the rear wall 8 comprise respective openings 9, 10 which expose the front surfaces 11, 12 of the rotor 5, in order to make air flow possible. Because the rotor 5 is arranged in the rotor chamber 6, an enclosed air volume 16 is formed around the rotor 5, which according to the invention receives in principle co-static pressures pw as the static pressure pzs of the outdoor air chamber 25 by means of the entry pressure equalizing device 27 being short-circuited. According to the most preferred embodiment, when the outdoor air chamber 25 connects to the rotor chamber 6, the pressure equalization device 27 is a hole in the wall - the front wall 7 - which separates the chambers 6, 25 from each other. The figure does not show pressure sensors, control equipment, etc. which are used to "18-03-23 in 2:06 OFF- balance the pressure set in the air handling unit 4 together with for example frequency control of the fans 1, 2 and together with outdoor air damper 28 and / or from air damper 31. The control always ensures that the pressure in the outdoor air chamber 25, which hardens the purest air, is always the highest pressure, and thus the air volume 16 around the rotor 5 automatically holds the clean air with higher pressure than the other chambers 21, 22, 26. The air which leaks around the rotor 5 then always leaks in the right direction and it is always the cleanest air that is delicious. Due to this device, advanced peripheral seals do not have to be used around the rotor periphery to prevent air leakage, but this does not preclude the use of such gaskets together with the invented device.
    Fig. 2 shows an alternative embodiment where the rotating heat recovery 3 is designed as a "closed" housing part 29, which encloses the rotor 5 through the front wall 7 and the rear wall 8, and four ends 30. These form the rotor chamber 6, which encloses the air volume 16, in as the previously described embodiment of Figure 1 and the rotor chamber 6 is sealed against leakage except that a certain leakage occurring between the rotor 5 and the openings 9, 10 at the peripheral seal 13, as well as at a purge sector, as described previously. type of peripheral seal 13, for example in the form of a single brush strip, between the periphery of the rotor 5 and the walls 7, 8 since the leakage which occurs here is controlled in that it is clean air and that the pressure in the rotor chamber 6 is controlled. In front of the wall 7, the pressure equalization device 27, in the form of a hole, is arranged and in the half of the assembly which connects to the outdoor air chamber 25. Just as described above, the pressure is checked and adjusted to be highest in the outdoor air chamber 25, the pressure in the rotor chamber 6 through the pressure equalization device 27 becoming or at least in principle the same. At least the pressure is regulated so that the pressure in the air volume 16 of the rotor chamber 6 is always slightly higher than the surrounding other chambers - the exhaust air chamber 21, the exhaust air chamber 22 and the supply air chamber 26.
    T-OOB POO2l / OO25 F-OO8 '16-03-23 12:07 FROM- ^ BOME LIST 1 = supply air fan 2 = exhaust air fan 3 = rotating heat exchanger 4 = air treatment unit5 = rotor 6 = rotor chamber 7 = front wall 8 = rear wall 9 = rear wall 9 = opening opening 11 = front surface 12 = front surface 13 = peripheral seals14 = interior surfaces15 = edge seals16 = air volume 17 = first air flow18 = second air flow19 = exhaust air 20 = exhaust air 21 = exhaust air chamber22 = exhaust air chamber23 = outdoor air 24 = supply air 25 = supply air chamber27 = supply air chamber housing part 30 = end 31 = damper 32 = fi | ter T-OOS POO22 / 0025 F-OOS
    权利要求:
    Claims (9)
    [1]
    An air treatment device comprising a supply air fan (1), an exhaust air fan (2), a rotary heat recovery unit (3), which are arranged at an air treatment unit (4), said rotary heat recovery unit (3) comprising an axially mounted and rotatable rotor (5) arranged around rotor chamber (6), which rotor chamber (6) comprises a front wall (7) and a rear wall (8), which walls (7, 8) comprise a respective opening (9, 10) for exposing the front surfaces (11, 12) of the rotor (5). ), and the rotating heat recovery (3) comprises peripheral seals (13) arranged to seal between the walls (7, 8) of the rotor chamber (6) in connection with the openings (9, 10) and the periphery of the rotor (5), and furthermore the rotor chamber (6) is sealed counter-surrounding inner surfaces (14) of the air treatment assembly (4), preferably through-edge seals (15) arranged between the rotor chamber (6) and the inner surfaces (14), the rotor chamber (6) comprising an air volume (16) surrounding the rotor (5), and the rotary heat recovery the interior (3) is arranged to transfer energy between a first air stream (17) and a second air stream (18), and the first air stream (17) comprises in the flow direction exhaust air (19) and exhaust air (20), the air treatment unit (4) comprising a exhaust air chamber (21) and an exhaust air chamber (22) on each side of the rotary heat recovery (3), and the other air stream (18) comprises in the flow direction outdoor air (23) and supply air (24), the air treatment unit (4) comprising an outdoor air chamber (25) and a supply air chamber (26) on each side of the rotary heat recovery (3), characterized in that the entry pressure equalization device (27) is arranged between the rotor chamber (6) and the outdoor air chamber (25), the air volume (16) in the rotor chamber (6) occupying a first pressure (pm) which is in principle equal to a second pressure (p25) in the outdoor air chamber (25).
    [2]
    Air treatment device according to claim 1, characterized in that measuring devices are arranged to measure the pressure in suitable positions in the air treatment unit (4), and further that a control equipment is arranged to ensure on the basis of the measured pressures that the second pressure (p25) in the outdoor air chamber (25) is always the highest pressure in relation to the other chambers (21, 22, 26) surrounding the rotor chamber (6).
    [3]
    Air treatment device according to Claim 1 or 2, characterized in that at least one damper (28) is arranged in the first air stream (17) before the exhaust air chamber (21).
    [4]
    Air treatment device according to one of the preceding claims, characterized in that the pressure equalization device (27) consists of a hole in the rear wall (8) of the rotor chamber (6) -
    [5]
    Air handling device according to one of Claims 1 to 3, characterized in that the pressure equalization device (27) consists of a hose which opens with one end into the rotor chamber (6) and with its other end into the outdoor air chamber (25).
    [6]
    Air handling device according to one of Claims 1 to 3, characterized in that the pressure equalization device (27) consists of a pipe which opens with one end into the rotor chamber (6) and with its other end into the outdoor air chamber (25).
    [7]
    Air handling device according to one of the preceding claims, characterized in that the attrotor chamber (6) is a complete housing part (29), comprising the front wall (7) and the rear wall (8) and four ends (30).
    [8]
    A method of controlling the air leakage at a rotating heat recovery unit (3) arranged in an air treatment unit (4), which rotating heat recovery unit (3) comprises an axially bearing and rotatable rotor (5) arranged in an enclosing rotor chamber (6), which rotor chamber (6) comprises an air volume (16) surrounding the rotor (5), and the rotating heat recovery (3) is arranged to transfer energy between a first air stream (17) and a second air stream (18), and the first air stream (17) comprises in the flow direction exhaust air (19) and exhaust air (20), the air treatment unit (4) comprising an exhaust air chamber (21) and a single air chamber (22) on each side of the rotary heat recovery (3), and the second air stream (18) comprises in the flow direction outdoor air (23) and supply air (24), the air treatment unit (4) comprising an outdoor air chamber (25) and a supply air chamber (26) on each side of the rotary heat recovery (3), characterized in that the pressure of the air volume (16) in the rotor chamber ( 6) is ensured to always be equal, or at least almost equal to the pressure in the outdoor air chamber (25), by a pressure equalizing device (27) equalizing the pressures between the chambers (6, 25), and ensuring that the pressure in the outdoor air chamber (25) is the the high pressure, whereby any leakage around the rotor (5) always takes place from the rotor chamber (6) in the direction of the other chambers (21, 22, 26).
    [9]
    A method according to claim 8, characterized in that the pressures within the air handling unit (4) are further controlled and regulated by means of measuring devices and control equipment to ensure the allowable pressure in the outdoor air chamber (25) is the highest pressure at all operating points, with any leakage around the rotor ( 5) always takes place from the rotor chamber (6) in the direction of the other chambers (21, 22, 26).
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    同族专利:
    公开号 | 公开日
    EP3311090A1|2018-04-25|
    EP3311090A4|2018-11-21|
    SE539066C2|2017-04-04|
    WO2016204671A1|2016-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10327078A1|2003-06-13|2004-12-30|Klingenburg Gmbh|Rotary heat exchanger and method for sealing such|
    EP2573496A1|2011-09-20|2013-03-27|Swegon ILTO Oy|A rotor assembly and a heat/energy recovery unit having a rotor assembly|
    US9404668B2|2011-10-06|2016-08-02|Lennox Industries Inc.|Detecting and correcting enthalpy wheel failure modes|
    US9772036B2|2011-12-05|2017-09-26|Nortek Air Solutions Canada, Inc.|Self-adjusting rotary wheel sealing system with foam mount|
    US9671122B2|2011-12-14|2017-06-06|Lennox Industries Inc.|Controller employing feedback data for a multi-strike method of operating an HVAC system and monitoring components thereof and an HVAC system employing the controller|
    US10598398B2|2012-03-20|2020-03-24|Air Distribution Technologies Ip, Llc|Energy recovery ventilation smoke evacuation|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550823A|SE539066C2|2015-06-16|2015-06-16|Air treatment device and means of controlling air leakage during air treatment|SE1550823A| SE539066C2|2015-06-16|2015-06-16|Air treatment device and means of controlling air leakage during air treatment|
    EP16812040.0A| EP3311090A4|2015-06-16|2016-05-18|Air treatment device and method for controlling air leakage in an air treatment device|
    PCT/SE2016/050447| WO2016204671A1|2015-06-16|2016-05-18|Air treatment device and method for controlling air leakage in an air treatment device|
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