EP3875862A1 - Pompe à chaleur - Google Patents

Pompe à chaleur Download PDF

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Publication number
EP3875862A1
EP3875862A1 EP20161643.0A EP20161643A EP3875862A1 EP 3875862 A1 EP3875862 A1 EP 3875862A1 EP 20161643 A EP20161643 A EP 20161643A EP 3875862 A1 EP3875862 A1 EP 3875862A1
Authority
EP
European Patent Office
Prior art keywords
heat pump
fan
ventilation duct
air
installation room
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.)
Pending
Application number
EP20161643.0A
Other languages
German (de)
English (en)
Inventor
Thomas LÖWENS
Hendrik SCHULZE
Michael Schaumlöffel
Tobija Stemmer
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.)
Stiebel Eltron GmbH and Co KG
Original Assignee
Stiebel Eltron GmbH and Co KG
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 Stiebel Eltron GmbH and Co KG filed Critical Stiebel Eltron GmbH and Co KG
Priority to EP20161643.0A priority Critical patent/EP3875862A1/fr
Publication of EP3875862A1 publication Critical patent/EP3875862A1/fr
Pending 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/12—Preventing or detecting fluid leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/345—Control of fans, e.g. on-off control
    • F24H15/35—Control of the speed of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • 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
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/12—Inflammable refrigerants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices

Definitions

  • the present invention relates to a heat pump, in particular a heat pump which is designed for installation in an installation room.
  • climate-friendly refrigerants In the recent past, the search for climate-friendly refrigerants has increased. However, the disadvantage of many climate-friendly refrigerants is their flammability. The use of such refrigerants, for example in heat pumps, therefore leads to special safety requirements. In order to ensure that there is no unwanted ignition of any refrigerant escaping from a refrigeration circuit, a minimum volume or a minimum space is prescribed in which the escaping refrigerant is distributed in order to achieve sufficient mixing.
  • flammable refrigerants are mainly used in heat pumps installed outdoors, or the amount of refrigerant is reduced so much that a leak cannot cause any significant damage.
  • the standard specifies the three named variants according to which the refrigerant is allowed to escape. Different heat pumps can therefore only be used for certain installation locations, more precisely the sizes of installation rooms.
  • a heat pump in particular a heat pump for installation in an installation room, is proposed with a housing, a refrigeration circuit arranged in a machine room with a combustible refrigerant, in particular R454C, and a ventilation duct for discharging escaping refrigerant.
  • a fan is assigned to the ventilation duct, the ventilation duct being connected to an air line which is suitable for guiding the installation room air out of the installation room.
  • the air line points into a mixing portal, the mixing portal being connected to the ventilation duct and the machine room and being suitable for bringing the installation room air and machine room air together.
  • a heat pump in particular a heat pump for installation in an installation room, with a housing, a cooling circuit arranged in a machine room with a flammable refrigerant, in particular R454C, and a ventilation duct for discharging escaping refrigerant is also proposed.
  • the heat pump has a fan which is connected to the ventilation duct. A pressure side of the fan is assigned to an end section. One suction side of the fan is assigned to the machine room and the suction side has an air connection to the installation room.
  • the fan is advantageously arranged in the ventilation duct.
  • One suction side is directed towards an outlet opening which represents an opening in the housing and as a result of which, in the event of a fault, refrigerant escaping from the refrigerant circuit is sucked to the fan.
  • the refrigerant is then conducted by the fan through the ventilation duct to an end section and blown from the heat pump or from the machine room into the installation room.
  • the suction side of the fan is advantageously also connected to the installation room by means of an air line.
  • the ventilation duct advantageously has an inlet opening, as a result of which the installation room air can flow to the fan. Since the fan is designed for permanent operation, and also permanently, i.e.
  • the installation room air is continuously drawn in via the suction side of the fan. Accordingly, there is a permanent and permanent volume flow of installation room air through the inlet opening, through the air connection to the suction side of the fan. There, the installation room air is conveyed through the air duct to the end section. Only in the event of a leak, when refrigerant escapes from the refrigerant circuit, is this refrigerant conveyed through an outlet opening in the machine room to the suction side of the fan.
  • the outside air and the refrigerant are advantageously brought together in a mixing portal, which is located in front of the suction side of the fan. At least a first mixing of outside air and refrigerant advantageously takes place here. In the event of a leak, refrigerant and outside air flow further in the air duct and continue to mix to form a mixed volume flow.
  • the suction side of the fan is only connected to the installation room and permanently draws in installation room air directly.
  • a connection between the outlet opening and the fan is advantageously not provided.
  • the outside air then flows in the ventilation duct to a Venturi nozzle.
  • the Venturi nozzle has an air connection, which advantageously has an acceleration unit.
  • the Venturi nozzle is advantageously connected to the machine room via the outlet opening and through the Negative pressure in the venturi creates a negative pressure in the engine room. In the event of a leak, the negative pressure in the Venturi nozzle sucks refrigerant out of the machine room through the outlet opening.
  • the mixing portal is the area where the outside air meets the refrigerant. Outside air, which is brought together with refrigerant, thus flows through the air connection, which is advantageously carried out in the Venturi nozzle in the mixing portal. Furthermore, in the event of a leak, a mixed volume flows out of the Venturi nozzle and continues in the ventilation duct to the end section.
  • the mixing portal is a zone where outside air and, in the event of a leak, refrigerant meet.
  • the mixing portal is advantageously formed by the end of the air line and the suction side of the fan. According to another concept of the invention, the mixing portal is formed in the Venturi nozzle, or after the Venturi nozzle, by the air line of the Venturi nozzle and the outlet opening.
  • refrigerant and installation room air are advantageously mixed. After leaving the ventilation duct, advantageously through a perforated plate, the refrigerant is further mixed with the outside air.
  • a negative pressure is generated in a machine room of the housing of the heat pump with an outside air flow, the fan running permanently and installation room air being sucked in permanently from the installation room.
  • refrigerant in a refrigerant circuit is sucked out of the machine room and mixed with the installation room air from the installation room.
  • the coolant is advantageously sucked in at least indirectly by the fan from the machine room and the mixture of coolant from the machine room and installation room air is conveyed back into the installation room.
  • a refrigerant-air mixture is continuously conveyed through the ventilation duct from the installation room by the fan, even if the refrigerant has already been conveyed from the machine room to the installation room, with the air and refrigerant being conveyed continuously in the event of a leak.
  • This means that the air and / or the refrigerant in the installation room is permanently moved and mixed with the air in the installation room there.
  • the permanent running of the fan advantageously includes possible calibration cycles in which it runs slowly.
  • a fan that clocks in an on-off mode also advantageously falls under the term permanent operation, even if the fan comes to a standstill for a short time, in particular for a calibration or safety mode.
  • a fan that varies in speed also falls under "permanent operation”. It is also advantageous to set the speed of the fan or its delivery capacity depending on a leakage detection. If a leak is detected, the speed or the delivery volume flow of the fan is advantageously increased.
  • Leak detection is advantageously provided, with which an error signal is displayed and advantageously sent by e-mail and the heat pump is switched off, advantageously switched to a voltage-free state, the fan continuing to run, advantageously with mains and / or battery operation.
  • a heat pump as standard in accordance with variant 1 described above, that is, to allow the refrigerant to flow out independently in an end section located at one end of the ventilation duct.
  • the ventilation duct can be designed as a rectangular duct attached to the outside of the heat pump.
  • a ventilation duct integrated into a side wall, rear wall or front wall is advantageous.
  • the ventilation duct is integrated into a side wall, front wall or rear wall of the heat pump, where thermal insulation or sound insulation is advantageously also provided.
  • a ventilation channel with a labyrinth is advantageously provided in front of and or behind the fan, in particular an inlet labyrinth in front of the fan and in particular an outlet labyrinth after the fan.
  • the suction side of the fan is connected to the machine room via the outlet opening and to the installation room via the inlet opening.
  • the pressure side of the fan is connected to the outlet labyrinth.
  • the mixing portal is advantageously formed behind the outlet labyrinth, advantageously primarily in front of the suction side of the fan.
  • the mixing portal is advantageously a zone where the outside air and the refrigerant that may escape in the event of a leak meet. It there is also advantageously a first mixture of outside air and refrigerant. A volume flow of refrigerant and outside air is then sucked through the suction side into the fan and further mixed there and advantageously in the downstream outlet labyrinth and flows as a mixed volume flow to the end section, where a perforated plate is advantageously provided through which the mixed volume flow into the installation room flows.
  • the inlet opening is advantageously arranged close to the floor in order to suck off the flammable refrigerant, which is usually of a higher density, from the floor area of the installation room and to convey it through the ventilation duct into a higher zone of the installation room.
  • the vent channel has the end section with a planned height of at least about 80 cm or a value of more than 80 cm above the ground.
  • the exit height of the mixed volume flow or the exit height of the refrigerant from the end section can be increased by means of an attachable air duct. If necessary, air ducts that are plugged or applied to the ventilation duct have a length of at least 30 cm and more in order to bring the end section into a higher position in the installation room, advantageously about 1.50 m or more.
  • the ventilation duct is formed by a pipe, in particular a flexible pipe, laid in the machine room of the heat pump or generally in the heat pump or on the heat pump, or a hose.
  • the mixing portal can be formed by a Venturi nozzle, which is advantageously arranged in the pipe or hose and has a connection to the installation room air and to the machine room.
  • the ventilation duct is designed as a hose and is furthermore advantageously connected to the fan.
  • the housing advantageously has an outlet opening and the ventilation channel adjoins the outlet opening.
  • the ventilation channel has a closable receptacle which is designed to accommodate a fan.
  • a closable receptacle for the fan is provided in the ventilation channel, which adjoins the outlet opening of the housing and is therefore accessible from the outside.
  • the closable receptacle enables the venting channel to leak only at one end opposite the outlet opening, but not in the area of the receptacle, and the outflow of refrigerant does not occur in the area of the receptacle.
  • the housing is preferably tight.
  • tight means in particular that the sum of the openings is less than 5 cm 2 or advantageously significantly less than 2 cm 2 .
  • the height of the end of the ventilation duct can be used to calculate the minimum size of the installation room, since neither the ventilation duct nor the housing have openings at a lower location that are greater than 5 cm 2 in total.
  • the ventilation channel is preferably designed as a flat channel, in particular as a flat channel in a rectangular shape.
  • a flat duct has the advantage that a particularly large cross-sectional area can be achieved without the ventilation duct protruding far beyond the housing of the heat pump.
  • a flat duct can rest particularly well on the housing of the heat pump and therefore not excessively increase the dimensions of the heat pump.
  • the ventilation duct preferably has coupling means for connecting an external air duct.
  • the ventilation duct is particularly preferably an air duct made in standard dimensions, so that coupling with other available air duct elements is possible.
  • the external air duct enables the heat pump to be expanded to include variant 3 of the above-mentioned safety concept.
  • the ventilation duct can be extended to the outside of the installation room and a discharge from any escaping refrigerant from the installation room can be reached. This reduces the minimum size of the installation room in this variant to 0 m 2 .
  • the ventilation duct preferably has sound insulation in its interior.
  • the opening in the tight and sound-insulated housing of the heat pump which is created by the outlet opening, ensures that noises from the inside of the heat pump can escape through the ventilation duct.
  • the ventilation duct preferably acts as a splitter silencer and can accordingly reduce the noises that can be measured outside the heat pump.
  • the outlet opening is arranged on an underside of the housing and the ventilation channel runs from the outlet opening below the housing to a rear side of the housing and upwards behind the rear side.
  • This advantageous guidance of the ventilation channel ensures that one end of the ventilation channel is high up, for example in the area of the upper edge of the housing or even above it. This means that the minimum size of the installation room can be reduced even without the fan being provided.
  • the shape which accordingly deflects the air flow twice, once from vertically in the direction of the outlet opening to horizontally under the housing, and then to vertically upwards in the area of the rear edge, enables any sound that is generated to be shielded particularly well by the double deflection .
  • the closable receptacle is preferably arranged in such a way that it is accessible from a front side of the housing of the heat pump.
  • the closable receptacle can, for example, directly adjoin the ventilation opening and adjoin a bottom surface of the housing.
  • the lockable receptacle can then be accessible below the housing, which stands for example on feet, and a fan to be installed can be inserted into the receptacle from the front if necessary. Maintenance and servicing of the fan is also easily possible, since the mount for maintaining the fan is also accessible from the front of the heat pump.
  • the heat pump preferably also has a fan, in particular a radial fan, which is received in the receptacle of the ventilation duct.
  • the heat pump is preferably designed as an internally installed brine-to-water heat pump or a water-to-water heat pump.
  • a relevant difference compared to air-water heat pumps is that brine heat pumps usually do not have any fans that can be used to convey any refrigerant that may escape from the installation room, so that additional elements must be provided to ensure the safety requirements .
  • a method for configuring an internally installed heat pump according to the invention having, depending on the size of an installation room: lengthening a ventilation duct of the heat pump to a greater height in the installation room; Providing a fan, in particular a radial fan in a receptacle of the ventilation duct, and / or lengthening the ventilation duct out of the installation room.
  • the fan is advantageously operated with a power of approx. 2 W or less. But higher outputs are also advantageous, depending in particular on the counter pressure in the ventilation duct.
  • the fan advantageously has a rated power of around 0.5 W to 20 W.
  • An advantageous delivery volume is between 10 m3 / h and 100 m3 / h. A delivery volume of approx. 300 m 3 can be advantageous, especially in the event of a leak.
  • FIGS 1 and 2 show schematic and exemplary perspective views of a heat pump 1 according to the invention from different directions.
  • the heat pump 1 has a housing 10 with a front side 12, a side part 13, a rear side 14, an upper side 16 and a lower side 18.
  • a cover 20 can usually be opened for maintenance and configuration of the heat pump 1 and enables access to the internal components.
  • Connections 22 are usually also formed in the area of the top 16.
  • a refrigeration circuit not shown, is arranged.
  • a ventilation duct 30 is arranged below and behind the device.
  • the ventilation channel 30 arises in a section 32 in which the housing 10 has an outlet opening (cf. Fig. 3-5 ), leads from there to the rear along the bottom 18 of the housing 10 and then vertically upwards, behind the rear side 14 of the housing 10.
  • An opening is formed at an upper end portion 34 of the ventilation duct 30, which has coupling means for connecting a external air duct 50 are formed.
  • the particularly preferred dimensioning of the ventilation duct 30 is shown as a rectangular flat duct. So that the weight of the entire heat pump 1 does not rest on the ventilation duct 30, the heat pump 1 also has feet 19 on its bottom 18.
  • a closable receptacle 36 of the ventilation duct 30 is accessible from the front side 12.
  • a fan can be mounted via the closable receptacle 36, as will be described later with reference to Figures 4 and 5 will be further described.
  • Fig. 3 shows schematically and by way of example a cross section through the heat pump 1 according to the invention.
  • the cover 20 which seals the housing 10 at the top.
  • an outlet opening 17 can be seen which is provided in the bottom of the housing 10 and leads directly into the interior of the receptacle 36 of the ventilation duct.
  • a sound insulation 38 is also arranged in the ventilation duct 30.
  • the ventilation duct 30 thus also acts as a splitter silencer around the emerging outlet opening 17.
  • an external air duct 50 can be connected to the upper end 34 of the ventilation duct 30.
  • FIG Fig. 3 shown are preferably standard components and dimensions of ventilation ducts, so that the heat pump 1 according to the invention can advantageously be combined with existing solutions.
  • Fig. 3 is indicated by arrows which path the exiting refrigerant takes up to the end 34 of the vent channel 30.
  • the exit height can be increased further and thereby the minimum size of the installation room can be greatly reduced. This can happen in particular if the installation room would be too small without the extension by means of the external air duct 50.
  • a fan 40 as shown schematically and by way of example in FIG Fig. 4 shown is supplementary received in the closable receptacle 36.
  • a combination of fan 40 and external air duct 50 with which the air can be led to the outside of the installation room, for example, whereby the minimum size of the installation room is reduced to 0 m 2 .
  • the fan 40 is a radial fan which blows out 90 ° to the suction direction and is preferably mounted in the ventilation duct 30. The installation of the fan 40 is facilitated by the flap 37 accessible from the front.
  • FIG. 6 an exemplary embodiment is shown in which the suction side 41 of the fan 40 points to the outlet opening 17.
  • a volume flow of refrigerant is conducted through the suction side 41 of the fan 40 through the fan 40 into the vent line 30 and through the vent channel 30 to the end section 34.
  • the end section 34 has a hole in sheet metal 35.
  • an air duct 50 is plugged onto the vent duct 30 and extends the vent duct by a predetermined height so that the refrigerant volume flow reaches a greater height and flows out in the installation room at a height of advantageously over 1.50 m above the floor of the installation room.
  • FIG. 8 Both Figures 8 and 9 there is a constant outside air volume flow V ⁇ ARL , which flows via an air line to the mixing portal 61.
  • the mixing portal 61 is located in a Venturi nozzle which is attached in the ventilation duct 30.
  • the Venturi nozzle has the air line 31 through which the outside air flow at least partially flows and is connected to the outlet opening 17.
  • the mixing portal 61 is thus located in the Venturi nozzle, where the outside air volume flow V ⁇ ARL and the refrigerant which emerges in the event of a leak meet.
  • the outside air volume flow V ⁇ ARL is guided via the air line 31 directly in front of the suction side of the fan 40.
  • a refrigerant volume flow V ⁇ ⁇ also flows to the mixing portal and meets the outside air there.
  • a first mixing of outside air and refrigerant takes place, with refrigerant and outside air then being conveyed further through the suction side 41 of the fan to the pressure side 42 of the fan 40 and then further through the ventilation duct 30.
  • Figure 10 shows a ventilation duct 30 integrated in a side part 13 with thermal insulation and / or sound insulation 21.
  • the fan 40 is arranged in the ventilation duct, the side part 13 having an inlet opening 15 through which outside air can flow to the suction side of the fan and it is in an end section Perforated plate 35 is provided through which at least the outside air volume flow V ⁇ ARL can exit again.
  • the side part 13 is also in Figure 11 shown with the inlet opening 15 and the perforated plate 35.
  • FIG 12 the side part 13 is shown without thermal insulation 21 and the view falls on a labyrinth which is open as a result and which is formed by an inlet labyrinth 39 and a foreign labyrinth 33.
  • the inlet labyrinth 39 and the outlet labyrinth 33 are used for sound insulation and acoustical decoupling of the machine room from the installation room. This also prevents liquids from entering.
  • An outside air volume flow V ARL can flow into the ventilation duct 30 through the inlet opening 15 and is conveyed to the fan 40.
  • the fan 40 has an outlet opening 17 which is connected to the machine room 11 of the heat pump 1.
  • the outside air volume flow V ARL is conducted via the pressure side 42 into the outlet labyrinth 33, where the outside air volume flow V ARL flows out again into the installation room 2 via the perforated plate 35.
  • the inlet opening 15 is advantageously arranged close to the floor and the perforated plate 35 points upwards.
  • the mixing portal 61 is shown in more detail.
  • the mixing portal 61 is in this embodiment in a direction of the outside air volume flow behind an air line 31.
  • the mixing portal 61 is between the air line 31 and the suction side 41 of the fan 40.
  • the outside air volume flow V ⁇ ARL flows through the inlet opening 15 to air connection 31 and through the air connection 31 to the mixing portal 61.
  • a refrigerant volume flow V ⁇ ⁇ continues to flow to the mixing portal 61 and is conveyed through the suction side 41 of the fan 40 to the pressure side 42 of the fan 40, after which there is the further venting channel 30 and a mixed volume flow of refrigerant and outside air continues to flow through the vent duct 30.
  • the fan 40 is sealed with a seal 43.
  • the air line 31 is formed by an opening or a cutout in the seal.
  • the air line 31 is limited by the fan 40, edges of the seal 43 and by the underside 18.
  • the mixing portal 61 is advantageously a zone or area in which outside air and, in the event of a leak, refrigerant meet.
  • the mixing portal 61 is located behind the air line 31 and in front of the suction side 41. If a Venturi nozzle is used, an indirect negative pressure is generated in the Venturi nozzle, not directly by the fan or the suction side of the fan 40, but by the Venturi nozzle area, where a flow acceleration and thus a pressure drop is generated. If a Venturi nozzle insert or a Venturi nozzle is used, the pressure drop in the Venturi nozzle is located in the ventilation duct 30 in the mixing portal 61, where outside air and, in the event of a leak, refrigerant come together.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)
EP20161643.0A 2020-03-06 2020-03-06 Pompe à chaleur Pending EP3875862A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20161643.0A EP3875862A1 (fr) 2020-03-06 2020-03-06 Pompe à chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20161643.0A EP3875862A1 (fr) 2020-03-06 2020-03-06 Pompe à chaleur

Publications (1)

Publication Number Publication Date
EP3875862A1 true EP3875862A1 (fr) 2021-09-08

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EP20161643.0A Pending EP3875862A1 (fr) 2020-03-06 2020-03-06 Pompe à chaleur

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023232504A1 (fr) * 2022-05-30 2023-12-07 Bdr Thermea Group B.V. Enceinte pour pompe à chaleur
EP4361518A1 (fr) * 2022-10-27 2024-05-01 BDR Thermea Group B.V. Enceinte pour une pompe à chaleur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3156741A1 (fr) * 2014-06-13 2017-04-19 Mitsubishi Electric Corporation Dispositif de pompe à chaleur
FR3070755A1 (fr) * 2017-09-07 2019-03-08 Bernier Developpement Dispositifs de securite pour installations frigorifiques et pompes a chaleur utilisant des fluides frigorigenes toxiques ou inflammables
DE202017006578U1 (de) * 2017-12-22 2019-03-25 Thomas Roggenkamp Klimaschrank
EP3578895A2 (fr) * 2018-06-05 2019-12-11 Vaillant GmbH Machine de rinçage de sécurité pour un boîtier de circuit de froid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3156741A1 (fr) * 2014-06-13 2017-04-19 Mitsubishi Electric Corporation Dispositif de pompe à chaleur
FR3070755A1 (fr) * 2017-09-07 2019-03-08 Bernier Developpement Dispositifs de securite pour installations frigorifiques et pompes a chaleur utilisant des fluides frigorigenes toxiques ou inflammables
DE202017006578U1 (de) * 2017-12-22 2019-03-25 Thomas Roggenkamp Klimaschrank
EP3578895A2 (fr) * 2018-06-05 2019-12-11 Vaillant GmbH Machine de rinçage de sécurité pour un boîtier de circuit de froid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023232504A1 (fr) * 2022-05-30 2023-12-07 Bdr Thermea Group B.V. Enceinte pour pompe à chaleur
EP4361518A1 (fr) * 2022-10-27 2024-05-01 BDR Thermea Group B.V. Enceinte pour une pompe à chaleur

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