EP3045828B1 - Abluftwärmenutzungsgerät - Google Patents

Abluftwärmenutzungsgerät Download PDF

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Publication number
EP3045828B1
EP3045828B1 EP16000046.9A EP16000046A EP3045828B1 EP 3045828 B1 EP3045828 B1 EP 3045828B1 EP 16000046 A EP16000046 A EP 16000046A EP 3045828 B1 EP3045828 B1 EP 3045828B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
exhaust air
heat
line
condensate
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.)
Active
Application number
EP16000046.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3045828A1 (de
Inventor
Ulrich Georg Holl
Markus Rieck
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.)
Zlt Lueftungs- und Brandschutztechnik GmbH
Original Assignee
Zlt Lueftungs- und Brandschutztechnik 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 Zlt Lueftungs- und Brandschutztechnik GmbH filed Critical Zlt Lueftungs- und Brandschutztechnik GmbH
Priority to PL16000046T priority Critical patent/PL3045828T3/pl
Publication of EP3045828A1 publication Critical patent/EP3045828A1/de
Application granted granted Critical
Publication of EP3045828B1 publication Critical patent/EP3045828B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/36—Drip trays for outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid

Definitions

  • the invention relates to an exhaust heat utilization device, comprising a housing with at least two connection openings, a heat exchanger and a drip pan, wherein a connection opening in the flow direction upstream of the heat exchanger and a connection opening in the flow direction behind the heat exchanger is arranged and wherein the heat exchanger is arranged in or above the drip pan ,
  • An established system is the heating of supplied air by means of an air-air heat exchanger directly from the exhaust air.
  • a supply air duct system is required in the building.
  • a second fan and a second air filter to protect the heat exchanger on the supply side are required for the supply air next to the exhaust fan.
  • the leakage rate is considered, ie how much of the exhaust air used, hygienically questionable, is entered again on the supply side in the building.
  • Equally critical here is the fire situation, where there is a risk that combustion gases from the exhaust air will be carried into the building through the supply air ducts in the event of a component failure, thereby contributing to the spread of hazardous combustion gases or even spreading the fire.
  • systems with an air-liquid heat exchanger are also used.
  • the heat energy of the warm exhaust air is transferred in an air-liquid heat exchanger to a liquid of a separate medium cycle.
  • the heat thus available in the medium cycle can then be used, for example, by a heat pump.
  • the raised by the heat pump to a higher temperature level heat energy can, for. B. continue to be used for heating domestic water. This has the advantage that heat accumulation and heat demand show a good agreement, because both the exhaust air heat accumulates year-round, and also the hot water is needed year-round.
  • the use of an air-liquid heat exchanger closes an air leakage flow from the exhaust air to the supply air side, hygienic problems on the supply air side and in case of fire, fire gas transmission from the exhaust air into the supply air in principle.
  • the supply of supply air can be realized by eg humidity-controlled outside air outlets, thus a supply air duct system is completely saved in the building.
  • US 8 869 548 B2 describes a ventilation system, which consists of a housing, a heat exchanger and two collecting devices, wherein a first collecting device is dimensioned smaller than a second collecting device and the first collecting device is disposed above the second collecting device.
  • the first collecting device has an overflow, which is designed so that excess condensed water flows into the second collecting device. From this second collecting device, the condensate is then discharged through processes.
  • US Pat. No. 6,895,770 B1 a similar system is proposed, wherein the second collecting device is arranged outside the housing and is connected via connecting lines with the first collecting device.
  • the EP 0 816 767 A2 discloses a device having the features of the preamble of claim 1.
  • Another solution is the cyclical cleaning of the congestion-threatening drains and drains.
  • US Pat. No. 6,442,956 B1 and US 8,840,729 B1 describe each the elimination of deposits within the processes or drain lines using compressed air.
  • a compressed air inlet is integrated in the drain lines.
  • the compressed air inlet is triggered either by a float located in the catcher or by flow sensors located in the drain lines.
  • Another approach is to issue an alarm signal with increasing blockage of the drain lines.
  • US 4,937,559 A describes such a system.
  • a float In the drain line of the collecting device, a float is arranged, which measures the water level within the drain line, which issued from a defined level of water, an alarm signal because there may be a blockage of the drain line.
  • the object of the invention is to provide an exhaust air heat recovery device whose collecting device for the condensed water is designed so that in a leakage of the liquid-carrying system in the heat exchanger, the exiting liquid is not released to the environment.
  • a condensate valve is arranged inside the housing and that this condensate valve is connected via a drain line to the collecting trough and that a condensate line is connected to the condensate valve and that the condensate line is guided out of the housing and that the volume of the collecting trough is greater than the total volume of the liquid-carrying system, the supply connection line and the return connection line.
  • the condensate valve is closed.
  • the liquid emerging from the liquid-carrying system is collected in the collecting trough.
  • the condensate valve prevents the leakage of the leaked liquid through the condensate line.
  • the volume of the drip tray is designed so that the Liquid that is in the liquid-carrying system of the heat exchanger, in the supply line and in the return line can be fully absorbed.
  • An advantageous embodiment provides that an exhaust air collecting space and / or an exhaust air collecting space is formed between the heat exchanger and the connection opening lying in the flow direction after the heat exchanger and / or between the heat exchanger and the connection opening lying in the flow direction before the heat exchanger.
  • the housing has an insulation. This ensures that the heat energy carried along with the exhaust air is not lost via the housing wall to the outside.
  • the housing consists of interconnected side parts, bottom parts and cover parts.
  • a further embodiment provides that the side parts and / or the bottom parts and / or the cover parts are designed with hinges or joints and / or have doors. This ensures that the housing is easy to open for maintenance, for example, and that parts lying inside the housing can be reached.
  • the housing is thus completely closed around the drip pan with preferably light-tight material. Since all air and media lines including the condensate line are made of light-tight material according to the prior art, conditions are created that minimize algal growth in the device and in the condensate drain or even completely prevent.
  • An embodiment provides that the media connections are configured radially separable.
  • a further embodiment provides that in the flow direction upstream of the heat exchanger, a temperature sensor and / or a smoke detector and / or a pressure sensor and / or in the flow direction to the heat exchanger, a temperature sensor and / or a Smoke detector and / or a pressure sensor are arranged.
  • a leakage of the liquid-conducting system in the heat exchanger via a pressure drop in the system can be detected via a pressure sensor in the supply connection line. The registration of such a pressure drop can then be used to control the condensate valve.
  • an electronic control of the sensors and / or the condensate valve is arranged on the housing.
  • the status of the sensors can be read with the housing closed or the condensate valve can be controlled from the outside.
  • One embodiment provides that a siphon is arranged in the condensate line. Thus, an air leakage current is prevented between the device interior and the end of the condensate line.
  • a further embodiment provides that the flow connection line and the condensate line or the return connection line and the condensate line or the supply connection line, the return connection line and the condensate line form a tube bundle and have a common insulation.
  • a further connection opening is arranged and that a bypass flap is attached to this connection opening.
  • This bypass damper can be controlled, for example, via one of the above-mentioned smoke detectors in the housing, so that in case of fire, a free outflow of smoke and combustion gases, bypassing the arranged upstream of the heat exchanger air filter is made possible.
  • the heat exchanger and / or the air filter and / or the drip tray are made exchangeable. Thus, maintenance is much easier.
  • One embodiment provides that a fan is attached to the connection opening arranged behind the heat exchanger in the flow direction. This can support, for example, the removal of the exhaust air.
  • connection openings are provided with connection pieces or with cover caps. If the housing has more than the at least two connection openings, wherein the further connection openings are not used, they can be provided with closure lids. On used connection openings, connecting pieces can simplify the connection of connection lines.
  • An embodiment provides that in the housing, a heat pump is integrated with a circulation pump and that the heat pump is connected to the supply line and the return line of the heat exchanger and thus between heat exchanger and heat pump, a heat carrier circuit is formed and that the heat pump is disposed above the sump and that the heat pump is connected via pipes with another heat circuit and that the volume of the drip tray is greater than the total volume of the heat cycle between the heat exchanger and heat pump. Even for such arrangements, the complete collection of leaking from the heat cycle between the heat exchanger and heat pump liquid is made possible.
  • Fig. 1 shows an inventive exhaust heat utilization device in perspective view.
  • the exhaust heat utilization device has a housing 2, which consists of cover parts 14, side parts and bottom parts, wherein in the illustration, the cover part 14 of the housing 2 has been removed so that the interior of the exhaust heat recovery device is visible.
  • the bottom part is not visible.
  • Cover part, bottom part and side parts are preferably made of sheet metal.
  • a heat exchanger 1 is arranged such that in the flow direction in front of the heat exchanger 1, an exhaust air collection chamber 6 and in the flow direction behind the heat exchanger 1, a continuous air collecting chamber 27 is formed.
  • the exhaust air collection chamber 6 and the exhaust air collection chamber 27 are not mandatory.
  • the flow direction in the housing 2 extends in the illustration from right to left.
  • the heat exchanger 1 is configured as an air-liquid heat exchanger with a liquid-conducting system.
  • the housing 2 has two connection openings 7 for the supply of exhaust air and a bypass flap 25 in the region of the exhaust air collecting space 6, one of the two connection openings 7 and the bypass flap 25 being optional. Furthermore, the housing 2 in the region of the exhaust air collecting space 27 on a connection opening 29 for the discharge of exhaust air.
  • all connection openings 7 are designed so that a connecting piece 8 or a closure lid 9 can be attached.
  • an air filter 16 is integrated in the flow direction in front of the heat exchanger 1, wherein this is not mandatory.
  • the feet 28 are designed adjustable in height.
  • the housing 2 itself may have a thermal insulation.
  • Fig. 2 shows an inventive exhaust heat utilization device according to Fig. 1 in a side view, wherein the inner region of the housing 2 is visible. Deviating from Fig. 1 the lid part 14 is mounted on the housing 2. To the connection opening 29, a fan 26 connects, which discharges the exhaust air.
  • the air-liquid heat exchanger has a flow connection line 4 and a return connection line 5, wherein both connection lines 4, 5 each have a media port 3, so that further flow and return lines can be connected and thus a heat carrier circuit is formed.
  • the heat carrier circuit may preferably contain a water glycol mixture or a refrigerant as the heat transfer medium.
  • the heat exchanger 1 is arranged above a drip pan 10. An arrangement within the drip pan 10 is also conceivable.
  • the drip pan 10 is designed so that its volume is greater than the total volume of the liquid-carrying system of the heat exchanger 1, the supply line 4 and the return line 5.
  • the drain pan 10 is followed by a drain line 11, which leads to a condensate valve 12.
  • To the Condensate valve 12 is followed by a condensate line 21.
  • the condensate line 21 is led out of the housing 2.
  • the drip pan 10 in the housing 2 has two tasks. In normal operation, the condensate valve 12 is opened so that any accumulating condensate is discharged through the drain line 11 and the condensate line 21 to the environment or into a sewer line. In the event of leakage of the heat exchanger 1 or its media connections 3, it is intended to prevent the heat transfer medium from entering the environment as an environmentally harmful medium. In case of leakage, the heat transfer medium is received by the drip pan 10. However, the medium should not flow away via the condensate line 21. For this purpose, the condensate valve 12 is closed, so that the flow between drain line 11 and condensate line 21 is stopped. By dimensioning the collecting trough 10, the entire in the liquid-carrying system of the heat exchanger 1 and in the flow and return connection lines 4, 5 located heat transfer medium can be added.
  • the air filter 16 is advantageously arranged so that it does not come into contact with the heat transfer medium or the condensate even when the collecting trough 10 is filled.
  • Fig. 3 shows an inventive exhaust heat utilization device according to Fig. 1 in plan view, with a possible arrangement of the drain line 11 and condensate line 21 is visible.
  • a siphon 22 is integrated in the condensate line 21, . This is to prevent air leakage through an unfilled or partially filled condensate line 21 due to different air pressure levels between the environment and the interior of the device.
  • the siphon 22 is preferably designed as a ball or flap siphon, the embodiment is not limited thereto.
  • a smoke detector 17 is optionally integrated in the exhaust air collection chamber 6, a smoke detector 17 is optionally integrated. This can be used for example for the control of the bypass flap 25.
  • the connection of the bypass flap 25 is advantageously carried out via identical connection openings 7, which are also used for the inlet of the exhaust air.
  • the same connection dimensions and connecting elements as for the connecting pieces 8 and the closure lid 9 are used for this purpose.
  • the bypass valve 25 can in principle be arranged at any position which also for the inlet of the Exhaust air is possible.
  • the bypass flap 25 is preferably designed as an insulated shutter flap. In addition to the housing insulation, the individual slats of the blind flap are also insulated.
  • one or more fans are arranged in the flow direction in front of the heat exchanger 1 outside the insulated housing 2.
  • one or more fans can be integrated in the device.
  • one or more fans can be arranged in the device in the flow direction after the heat exchanger 1 and before the connection opening 29 of the exhaust air.
  • a pressure sensor 18 is arranged in the feed line and / or a pressure sensor 18 is arranged in the return line.
  • a temperature sensor and / or a smoke detector 17 and / or a pressure sensor and / or in the flow direction to the heat exchanger a temperature sensor and / or a smoke detector and / or a pressure sensor arranged.
  • an air filter 16 with Differenzdruckaufêtivity for monitoring the degree of contamination of the air filter 16 or optionally an electronic constant pressure control for the exhaust fan with a Differenzdruckaufillon for detecting the air pressure in front of and behind the fan be integrated.
  • the sensors are advantageously arranged so that after opening the housing 2, these are freely accessible.
  • a terminal box 19 with an electronic detection of the sensor data and / or a control of the condensate valve 12 is attached.
  • the sensors or the condensate valve are connected via connection cable 20 to the terminal box 19, wherein the connection cable 20 flexible and designed in their length so that when converting the terminal box 19 to another side of the housing, the connection cable 20 need not be solved.
  • the possibility of the terminal box 19 umzumontieren without having to solve cable connections, allows the use of a standard device under a variety of local conditions.
  • the housing 2 is designed with feedthroughs 30 such that the connection of the heat carrier lines 4, 5 and the condensate line 21 at different positions on the housing 2 is possible. Unused passages are provided for example with a connection cover 9. In principle, it is advantageous to carry out uniformly all the connection openings 7, 29 and the passages 30 on the housing 2, so that uniform connection sockets 8 or connection covers 9 can be used.
  • connection openings 7, 29 are preferably designed as circular openings with screw connections on a concentric circle, a brush, lip or O-ring seal on the cylinder wall and an axial circular flat seal around the connection opening 7, 29 around. This realizes a double sealing system. Furthermore, a conversion of add-on components and caps 9 at any time only by loosening and tightening screw is possible.
  • the media connections 3 are configured as radially separable connections, preferably flat sealing connections with union nut, whereby after dissolving the media connections 3 of the heat exchanger 1 perpendicular to the axis of the supply and return connection line 4, 5 and can be removed without the preferably rigid lines 4, 5 must be moved.
  • the device is suitable for outdoor use on a building roof or for indoor installation in the building. Furthermore, it is advantageous to integrate elements for sound attenuation in the exhaust air heat recovery device.
  • Fig. 4 shows an inventive exhaust air heat recovery device in an alternative embodiment with the lid open part in the plan.
  • no vertical upward blower fan 26 is provided.
  • the exhaust air flow is guided via a connection opening 29 with connecting piece 8 from the exhaust air collecting chamber 27.
  • an embodiment is shown without smoke detector 17, without bypass flap 25 and with three connection openings 7, wherein two of the connection openings 7 are provided with a closure lid 9 and a connection opening 7 with a connecting piece 8.
  • the cover parts 14, side parts and bottom parts of the housing 2, which are equipped with hinges or hinges for opening the housing or the doors on the lid, side and bottom parts are designed in size so that the heat exchanger 1, the air filter 16 or the drip pan 10 can be removed after the release of the connecting elements and can be used again.
  • Fig. 5 shows how the condensate line 21, the supply line 4 and the return line 5 are led out as an axially parallel tube bundle 23 from the insulated housing 2.
  • the tube bundle 23 has a common for all pipes strong insulation 24 to the outside, the individual lines against each other, however, are only slightly isolated, so that in a cable routing outdoors and low outdoor temperatures during operation, the condensate line 21 of one or both lines 4, 5 is tempered so far that it remains frost-free and therefore functional.
  • the housing 2 has one or more upwardly hinged cover parts 14 or laterally pivoting doors, which are each secured on one side with hinges 13 and have a stop and a weight relief. Thus, all functional components after opening the lid part 14 or the doors are directly accessible.
  • Fig. 6 and Fig. 7 show the installation of an exhaust air heat recovery device according to the invention.
  • the device stands on height-adjustable and angle-adjustable feet 28, allowing it to be set up on both level and pitched roofs, with the exact horizontal orientation and fixation being made right on the floor without having to add or remove components.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ventilation (AREA)
  • Other Air-Conditioning Systems (AREA)
EP16000046.9A 2015-01-13 2016-01-12 Abluftwärmenutzungsgerät Active EP3045828B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16000046T PL3045828T3 (pl) 2015-01-13 2016-01-12 Rekuperator ciepła ze zużytego powietrza

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015000066.5U DE202015000066U1 (de) 2015-01-13 2015-01-13 Abluftwärmenutzungsgerät

Publications (2)

Publication Number Publication Date
EP3045828A1 EP3045828A1 (de) 2016-07-20
EP3045828B1 true EP3045828B1 (de) 2018-06-13

Family

ID=53372431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000046.9A Active EP3045828B1 (de) 2015-01-13 2016-01-12 Abluftwärmenutzungsgerät

Country Status (3)

Country Link
EP (1) EP3045828B1 (pl)
DE (1) DE202015000066U1 (pl)
PL (1) PL3045828T3 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3567329A1 (de) * 2018-05-09 2019-11-13 Linde Aktiengesellschaft Kondensatextraktionsvorrichtung und wärmetauscher
NL2023773B1 (nl) * 2019-09-04 2021-05-12 Itho Daalderop Nederland B V Warmtepompinrichting en sifon voor gebruik in een warmtepompsysteem
FR3112846B1 (fr) * 2020-07-24 2022-08-19 Jacir Aérocondenseur sec ou adiabatique comprenant un système de neutralisation de fuites potentielles de fluide frigorigène

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937559A (en) * 1989-08-21 1990-06-26 Meacham Huey W Air conditioner drain blockage alarm
DE19626923C2 (de) * 1996-07-04 2000-11-02 Steag Ag Anlage zum Kühlen von Räumen
US6442956B1 (en) * 2001-12-19 2002-09-03 Michael A Herren Drain tube auto-servicing apparatus
US6895770B1 (en) * 2002-12-23 2005-05-24 Kenneth J. Kaminski Condensate secondary pan for a central air conditioning system
US8869548B2 (en) * 2007-08-07 2014-10-28 Aspen Manufacturing, LLC. Coil with built-in segmented pan comprising primary and auxiliary drain pans and method
DE202011004012U1 (de) * 2011-03-15 2012-07-05 Stiebel Eltron Gmbh & Co. Kg Haustechnikgerät zur Aufstellung in einem Gebäude mit einer Kombination aus einer Wärmepumpe und einem Lüftungsteil
US8840729B1 (en) * 2011-03-24 2014-09-23 Michael Herren Air conditioning drain cleaning system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE202015000066U1 (de) 2015-05-11
EP3045828A1 (de) 2016-07-20
PL3045828T3 (pl) 2018-11-30

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