EP4379270A1 - Vorrichtung zur reduzierung des lärms einer ausseneinheit einer wärmepumpe und wärmepumpenanordnung dafür - Google Patents

Vorrichtung zur reduzierung des lärms einer ausseneinheit einer wärmepumpe und wärmepumpenanordnung dafür Download PDF

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Publication number
EP4379270A1
EP4379270A1 EP23213154.0A EP23213154A EP4379270A1 EP 4379270 A1 EP4379270 A1 EP 4379270A1 EP 23213154 A EP23213154 A EP 23213154A EP 4379270 A1 EP4379270 A1 EP 4379270A1
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EP
European Patent Office
Prior art keywords
envelope
air
heat pump
outdoor unit
noise reduction
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
EP23213154.0A
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English (en)
French (fr)
Inventor
Yannick Patrick Dominique PEPE-GUES
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.)
Unisson Ingenierie Acoustique
Original Assignee
Unisson Ingenierie Acoustique
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Filing date
Publication date
Application filed by Unisson Ingenierie Acoustique filed Critical Unisson Ingenierie Acoustique
Publication of EP4379270A1 publication Critical patent/EP4379270A1/de
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
    • F24F13/24—Means for preventing or suppressing noise
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • F24F1/58—Separate protective covers for outdoor units, e.g. solar guards, snow shields or camouflage

Definitions

  • the present invention relates to the general technical field of accessories and equipment intended to be associated with heat pumps, more precisely to reduce the noise generated by the latter, in particular the noise generated by external heat pump units.
  • the present invention relates more particularly to a heat pump assembly, comprising an external heat pump unit and a noise reduction device as mentioned above.
  • Air conditioning systems using a heat pump are well known.
  • so-called “ split ” air conditioning systems are known which include an internal unit, placed inside a building, and an outdoor unit, placed outside the building.
  • the heat pump essentially allows heat to be taken from inside the building and released outside, thereby cooling the building.
  • the heat pump uses a working fluid which conventionally undergoes successive cycles of compression, condensation, expansion, evaporation.
  • Heat pumps therefore usually include a compressor and internal ventilation elements which can generate significant noise, particularly at the level of the outdoor unit.
  • the external units thus contribute significantly to the surrounding noise pollution, and often constitute a significant source of nuisance for the immediate neighborhood.
  • Their noise level may even be considered intolerable by certain people, and generate neighborhood conflicts, particularly in densely populated areas (buildings, condominiums, terraced or neighboring houses, etc.), or near industrial sites (retail centers). data, factories, laundries, clean rooms, etc.), public establishments (schools, cultural centers, swimming pools, etc.), commercial establishments (bakeries, supermarkets, restaurants, etc.) or tertiary establishments (hotels, hospitals, retirement homes , offices, etc.).
  • outdoor units generally have an unattractive appearance, which is noted in particular by the visible nature of certain technical elements (air outlet and inlet grilles in particular).
  • noise reduction devices for external heat pump units, in particular box-type noise reduction devices.
  • a box generally includes a plurality of acoustic plates and/or grilles attached to and around the outdoor unit.
  • the enclosure thus formed encloses within it the external unit of the heat pump, and generally allows an effective reduction in the perceived noise generated by said external unit.
  • the classic configuration of known enclosures generally does not allow a satisfactory reduction in the noise generated by the outdoor unit, in particular at low frequencies, without generating unacceptable high air pressure losses, which would cause on the one hand consumption more significant electricity and on the other hand a drop in the efficiency of the outdoor unit of the heat pump.
  • known enclosures generally have a significant bulk, an unattractive external appearance, and require the implementation of complex and generally expensive installation operations requiring the intervention of a professional.
  • known enclosures have a manufacturing cost which may seem significant when compared to the reduction in noise observed which remains relatively modest.
  • the objects assigned to the present invention therefore aim to remedy the various drawbacks listed above and to propose a new device for reducing the noise of an external heat pump unit whose design, while being simple and robust, makes it possible to reduce the acoustic annoyance produced by the outdoor heat pump unit significantly, without altering the aeraulic and thermodynamic performance of the heat pump.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit which is easy and quick to manufacture industrially.
  • Another object of the invention aims to propose a new noise reduction device making it possible to reduce the noise generated by an external heat pump unit over a wide spectrum of sound frequencies, including high, medium and low frequencies.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit whose design does not result in a significant increase in the electrical consumption of the outdoor heat pump unit. , nor does it harm the proper aeraulic operation of the latter.
  • Another object of the invention aims to propose a new device for reducing the noise of an external heat pump unit of particularly compact construction.
  • Another object of the invention aims to propose a new device for reducing the noise of an external heat pump unit, the installation of which can be carried out in a particularly simple, rapid and economical manner.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit which requires only minimal maintenance.
  • Another object of the invention aims to propose a new device for reducing the noise of an external heat pump unit which has an aesthetic appearance that is easily valorized and integrated.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit whose design allows it to be easily adapted to outdoor units of different types and dimensions.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit whose design allows excellent thermal protection of the outdoor unit, minimizing icing and reducing the time of defrosting it.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit whose design allows it to optimize the air supply necessary for the outdoor unit according to the needs of the latter.
  • Another object of the invention aims to propose a new device for reducing the noise of an external heat pump unit whose design allows it to avoid undesirable aeraulic phenomena.
  • Another object of the invention aims to propose a new device for reducing the noise of an outdoor heat pump unit whose design allows it to obtain optimized aeraulic performance as a function of the operating conditions of the outdoor unit, while generating minimal noise and requiring minimal power consumption.
  • Another object of the invention aims to propose a new heat pump assembly having optimized electrical consumption while generating only a minimum of noise.
  • the objects assigned to the invention are also achieved using a heat pump assembly comprising an outdoor heat pump unit and a noise reduction device according to the above.
  • the invention relates, according to a first aspect, to a noise reduction device 1 of an outdoor unit 2 of a heat pump.
  • Said device noise reduction 1 is therefore advantageously designed to equip said outdoor unit 2 with a heat pump, but preferably constitutes as such equipment distinct from said outdoor unit 2.
  • Said noise reduction device 1 is more particularly designed to be attached around (and against) said outdoor heat pump unit 2.
  • the noise reduction device 1 is designed to reduce the noise generated by said outdoor unit 2, and more precisely to reduce the sound level perceived when said outdoor unit 2 operates while being associated with the noise reduction device 1, in comparison of the sound level perceived when said outdoor unit 2 operates without being associated with the noise reduction device 1.
  • Said heat pump outdoor unit 2 advantageously forms an outdoor unit of a heat pump, which preferably forms part of an air conditioning, refrigeration and/or heating system.
  • Said heat pump is preferably aerothermal, and can for example be of the air/air or air/water type.
  • Said system is preferably intended to modify the internal temperature of at least one room, room and/or confined space, generally located within a building.
  • said external heat pump unit 2 is according to a first variant designed to cool and/or heat a fluid and send it to an internal heat pump unit advantageously placed inside the building and/or the room , room and/or confined space.
  • the outdoor unit 2 constitutes as such the heat pump, and forms for example a single unit for producing cold and/or hot fluid (chilled water or hot water for example).
  • the heat pump can also be part of a heat pump unit producing heat and cold simultaneously, or be a so-called hybrid heat pump, or even have a variable refrigerant flow rate(s), d other variants and combinations of what precedes and what follows are of course possible.
  • Said external unit 2 is in any case advantageously intended to be placed outside, in particular outside the building, the room, room and/or confined space where said internal unit is advantageously located (when there is one). to one).
  • the outdoor unit 2 is typically placed at the level of an exterior space, which can be either in the open air or covered by a courtyard, but preferably not in a confined space, in particular surrounded by four walls and a roof.
  • said internal and external units 2 form said heat pump, or said external unit 2 alone forms said heat pump. Which heat pump is therefore advantageously part of said air conditioning, refrigeration and/or heating system.
  • Said system can be reversible (also called invertible), that is to say designed to heat or cool a fluid according to need, or even simultaneous, that is to say designed for the production of hot and cold in simultaneous (cooling one fluid and heating another for example), or even adapted to operate in one or more of the different modes mentioned above depending on the need (production of heat, cold, reversible mode, simultaneous mode, etc.) .
  • said system constitutes reversible air conditioning, capable of cooling or heating the interior of the room, room and/or confined space, as needed.
  • said heat pump can be designed to be able, according to this last embodiment, to operate in a reversible manner, that is to say that it is designed to be able to alternate between a heating mode, where said heat pump heat takes a quantity of heat from the outside and supplies it inside the room, room and/or space, or an air conditioning (and/or refrigeration) mode, where said heat pump takes a quantity of heat from the inside the room, room and/or confined space and provides it to the outside (more particularly to the outside of the building).
  • Said heat pump advantageously comprises a working fluid, which it uses during successive cycles of compression, condensation, expansion, evaporation.
  • said external unit 2 preferably comprises a working fluid, and it is advantageously designed to use the latter during stages of compression, condensation, evaporation, and/or expansion.
  • the noise reduction device 1 is specifically adapted to a type of outdoor heat pump unit 2, for example to a type of outdoor heat pump unit 2 having specific dimensions, and /or a particular power range. According to another particular embodiment, the noise reduction device 1 is adaptable to different types of outdoor heat pump unit 2, for example to heat pump units 2 having different dimensions from each other, powers different from each other, architectures different from each other, etc.
  • said heat pump exterior unit 2 comprises several pieces of equipment essential to the operation of said heat pump.
  • said outdoor unit 2 comprises a compressor, at least one heat exchanger (for example a condenser and/or an evaporator), and/or its own ventilation means, for example one or more suction/exhaust fans internal to said outdoor unit 2.
  • Said ventilation means are therefore advantageously placed inside the outdoor unit 2 (and form part of it), and make it possible, for example, to improve the efficiency of said heat exchanger. It is these different pieces of equipment of the outdoor unit 2 which generally generate unwanted noise, and often at a significant noise level, which is difficult to ignore.
  • the invention relates to a heat pump assembly comprising an external heat pump unit 2 and a noise reduction device 1 as described above and below, said noise reduction device 1 being obviously advantageously designed to be associated with said external unit 2.
  • the description which precedes and which follows concerning the noise reduction device 1 (and the external unit 2) therefore advantageously also applies to the pump assembly. heat, and vice versa.
  • the outdoor heat pump unit 2 has a general parallelepiped shape, preferably a general shape of a straight block or cube.
  • the outdoor unit 2 has a general shape of a straight block, which is known as such and common among outdoor heat pump units.
  • Said envelope 4 is thus designed, according to a particular variant of the invention compatible with the above, to accommodate an external heat pump unit 2 having a general shape of a parallelepiped, preferably a general shape of a straight block or cube.
  • Said outdoor unit 2 comprises an air inlet 3 for supplying air to said heat pump outdoor unit 2.
  • said outdoor unit 2 typically needs air (preferably coming from outside) to operate correctly, for example to cool or heat said heat exchanger.
  • FIG 2 thus illustrates the outdoor unit 2 conforming to a particular embodiment of the invention, said outdoor unit 2 being represented alone in this last figure, that is to say not equipped with the noise reduction device 1 unlike the figures 3, 4 , And 6 to 8 .
  • Said outdoor unit 2 is illustrated in figure 2 on the side of said air inlet 3, the latter therefore being visible in the form of a grille forming part of said outdoor unit 2, and behind which is possibly one or more of the ventilation means specific to said outdoor unit 2
  • said air inlet 3 is preferably designed to receive air coming from outside said outdoor unit 2, and more precisely air coming from the external environment.
  • Said outdoor unit 2 thus advantageously comprises at least one orifice designed to pass air coming from the outside, said orifice being for example located behind said grille.
  • said noise reduction device 1 comprises at least the envelope 4 which therefore makes it possible to house the external unit 2, and the first means of communication which in turn makes it possible to connect the interior of the envelope 4, where said exterior unit 2 is located, with the exterior of said envelope 4, so as to allow the air surrounding the exterior of said envelope 4 to penetrate inside it and to be used by said outdoor unit 2, for example to cool a heat exchanger thereof.
  • the outside air which enters said envelope 4 in practice also then enters inside said exterior unit 2 through said air inlet 3.
  • Said envelope 4 is advantageously designed to envelop said exterior unit 2, preferably completely or almost completely, while allowing the necessary flows (electricity, working fluid, air, etc.) to pass for the operation of said unit. exterior 2.
  • Said envelope 4 is therefore advantageously substantially closed (with the obvious exception of the passages left for said flows), and as will be seen, preferably (at least partly) airtight.
  • said envelope 4 is advantageously designed to surround said exterior unit 2 on all sides thereof. For example, when said external unit 2 has the shape of a straight block (with six faces therefore), said envelope 4 is designed to surround the six faces of said straight block.
  • Said envelope 4 is advantageously designed to hide from the outside view at least 80% of the exterior unit 2, preferably at least 90%, more preferably almost all or all, of the exterior unit 2. envelope 4 therefore advantageously presents an internal space intended to accommodate the external unit 2.
  • said envelope 4 constitutes excellent thermal protection of the exterior unit 2, said envelope being preferably substantially sealed (with the exception of flow passages made in the envelope 4 for the proper functioning of the exterior unit 2 ).
  • the envelope 4 thus provides the exterior unit 2 with a certain thermal inertia relative to the exterior ambient temperature (outside the exterior unit 2, but also outside the envelope 4).
  • Said outdoor unit 2 is advantageously designed to operate in a defrosting mode, in particular to ensure the defrosting of internal elements of the outdoor unit 2, in particular the evaporator of the latter, which is likely to be covered with ice and therefore have reduced efficiency and a high operating noise level.
  • the noise reduction device 1 and in particular thanks to the envelope 4, equipping and surrounding the outdoor unit 2, the " defrost " operating mode of the latter is particularly effective and its duration is reduced, since the hot air remains longer and with less heat loss within the outdoor unit 2 and directly around it.
  • the outdoor unit 2, and more particularly the evaporator 2 of the latter will take longer to ice up.
  • Said envelope is advantageously made, at more than 50% by weight, more preferably at more than 90% by weight, of polymer(s), preferably of polyethylene, more preferably of high density polyethylene (HDPE).
  • polymer(s) preferably of polyethylene, more preferably of high density polyethylene (HDPE).
  • Said envelope is advantageously made, at more than 50% by weight, more preferably at more than 90% by weight, in one (or more) recyclable and/or recycled material(s).
  • Said recyclable and/or recycled material preferably comprises a polymer, which is preferably polyethylene, more preferably high density polyethylene (HDPE).
  • said envelope 4 has a general shape of a parallelepiped, preferably a general shape of a straight block or cube.
  • This configuration is one of the simplest, particularly when the outdoor unit 2 itself has the general shape of a parallelepiped, a straight block or a cube.
  • the envelope 4 has the shape of a straight block.
  • said envelope 4 comprises at least one lower wall 5 interposed between the ground and the exterior unit 2.
  • Said lower wall 5 is therefore advantageously designed to receive the exterior unit 2.
  • the envelope 4 is preferably designed so that said exterior unit 2 is arranged on said lower wall 5.
  • the latter is for example formed by a substantially flat plate, preferably made of plastic, but alternatively of another material, for example wood or metal.
  • said exterior unit 2 rests on said lower wall 5, as illustrated in the particular examples of figures 3, 4 , And 6 to 8 , said lower wall 5 is preferably intended to be positioned facing the ground.
  • Said lower wall 5 is advantageously intended to be arranged substantially horizontally.
  • said envelope 4 comprises at least one upper wall 6 intended to be arranged above the exterior unit 2.
  • Said upper wall 6 is therefore advantageously designed to overhang the exterior unit 2.
  • the envelope 4 is preferably designed so that said external unit 2 is arranged under said upper wall 6.
  • the latter is for example formed by a substantially flat plate, preferably made of plastic, but alternatively in another material, for example wood or metal .
  • Said upper wall 6 is preferably intended to be arranged substantially horizontally.
  • Said lower wall 5 and upper wall 6 are advantageously arranged substantially parallel (and at a distance) to each other.
  • Said upper wall 6 is advantageously arranged substantially above said lower wall 5, the external unit 2 being intended to be placed between said lower 5 and upper 6 walls.
  • Said envelope 4 advantageously comprises a plurality of side walls 7, 8, 9, 10 surrounding the exterior unit 2 and preferably extending vertically.
  • the envelope 4 comprises a first, a second, a third and a fourth side wall 7, 8, 9, 10, said four side walls 7, 8, 9, 10 being designed to laterally surround said outdoor unit 2.
  • Each side wall 7, 8, 9, 10 is preferably intended to extend substantially vertically.
  • Said first and third side walls 7, 9 are preferably substantially parallel to each other, while said second and fourth side walls 8, 10 are preferably substantially parallel to each other.
  • Said first and second side walls 7, 8 are advantageously perpendicular and connected to each other.
  • Said second and third side walls 8, 9 are advantageously perpendicular and connected to each other.
  • Said third and fourth side walls 9, 10 are preferably perpendicular and connected to each other.
  • Said fourth and first side walls 10, 7 are preferably perpendicular and connected to each other.
  • the four side walls 7, 8, 9, 10 do not have an orifice allowing air to circulate between the interior and exterior of the envelope 4.
  • figures 3, 4 And 8 the side wall 7 has been made transparent, and figures 6 And 7 , the side wall 9 has been made transparent.
  • the lower walls 5 and upper 6 and the four side walls 7, 8, 9, 10 thus form, according to a variant, the envelope 4, which then preferably has the shape of a straight block.
  • said first means of communication comprises at least a first electric intake fan 11 arranged inside the envelope 4 to supply said air inlet 3 with a forced flow of exterior air E
  • Said first electric intake fan 11 is thus advantageously designed to force the suction, within the envelope 4, of external air coming from outside the envelope 4.
  • Said electric intake fan 11 is. thus advantageously designed to drive said forced flow of exterior air E into the envelope 4, independently or in combination with the action of any ventilation means specific to the exterior unit 2.
  • the first electric intake fan 11 preferably being a simple and energy-efficient element.
  • this configuration makes it possible to avoid overconsumption of the external unit 2 and/or inefficient operation of the latter, since it is abundantly supplied with external air necessary for heating or cooling its working fluid thanks to the supply within the envelope 4 (and then within the exterior unit 2) of said forced flow of exterior air E.
  • the exterior unit 2 if it were simply enclosed in said envelope 4 without the first fan electric intake 11, could in fact lack air to function correctly, or would have to expend more energy to achieve the same result.
  • the combination of the envelope 4 on the one hand and the first electric intake fan 11 on the other hand to supply the forced flow of outside air E to the air inlet 3 makes it possible to obtain very good results both from an acoustic point of view with excellent noise reduction and from the point of view of the power consumption of the outdoor unit 2, which is optimized or even reduced.
  • Said first electric intake fan 11 largely compensates for the pressure losses induced by the envelope 4 with regard to the air supply to said external unit 2, and therefore allows the latter not to overconsume to compensate for its " encapsulation " by said envelope 4.
  • Said forced flow of outside air E can possibly be considered as a flow of air entering within said envelope 4 induced by the first electric intake fan 11.
  • Said first electric intake fan 11 is preferably arranged completely inside the envelope 4.
  • Said electric intake fan 11 is preferably completely separate from and/or placed away from one, several, or all of the side walls 7, 8, 9, 10, upper wall 6 and wall lower 5.
  • Said first electric intake fan 11 is very preferably not integrated into any of said walls 5, 6, 7, 8, 9, 10 of said envelope 4 (these walls are in any case preferably not thick enough , nor designed to, collect a fan within them).
  • the first electric intake fan 11 is thus advantageously completely hidden from outside view by said envelope 4.
  • said first electric intake fan 11 is preferably invisible from the outside of the noise reduction device 1
  • Said first electric intake fan 11 is for example arranged both away from and facing said second side wall 8 and/or said fourth side wall 10.
  • Said first electric intake fan 11 is according to a particular configuration illustrated in particular in Figure 3 , arranged substantially parallel to said second side wall 8 and/or to said fourth side wall 10 (the side walls 8 and 10 being parallel), and placed between these last two walls.
  • said first electric intake fan 11 is advantageously arranged substantially perpendicular to the first and third side walls 7, 9, and/or to the lower 5 and upper walls 6.
  • Said first electric intake fan 11 is by example placed at least 4 cm, preferably at least 8 cm, more preferably at least 10 cm, at a distance from said second side wall 8 and/or said fourth side wall 10. This makes it possible in particular to avoid annoying effects of recirculation, back pressure, and pressure losses of the forced flow of outside air E.
  • said first electric intake fan 11 is for example placed at least 4 cm, preferably at least 8 cm, more preferably at least 10 cm, at a distance from any wall of the envelope 4 to which it faces, and/or at a distance from any wall of the envelope 4 with which it is not arranged perpendicularly (side walls 8, 10 in the example of the Figure 3 ).
  • said envelope 4 delimits, thanks to its different walls 5, 6, 7, 8, 9, 10, an internal space (already mentioned previously) within which said first electric intake fan 11 is located, more precisely in the first interior space (which will be defined below).
  • the first electric intake fan 11 is placed away (preferably more than 4 cm) from all the side walls 7, 8, 9, 10, and (very) away (preferably more 10 cm) from the lower wall 5, but optionally has an upper edge pressed against the upper wall 6, to which it does not face and in relation to which it is in particular arranged perpendicularly.
  • the first electric intake fan 11 can also be placed (slightly) away (for example, at least 1 cm) from said upper wall 6, below it.
  • Said first electric intake fan 11 is preferably a helical fan (sometimes also called axial fan).
  • Said first electric intake fan 11 thus advantageously comprises an electrically actuated ventilation wheel, preferably designed to rotate around an axis of rotation.
  • Said first electric intake fan 11 further advantageously comprises an electric motor for operating said ventilation wheel.
  • Said ventilation wheel is advantageously mounted to rotate relative to the casing 4 so as to rotate around said axis of rotation when said electric motor is actuated.
  • Said ventilation wheel is preferably formed by a propeller.
  • said forced flow of exterior air E is sucked inside the envelope 4 by passing through the first intake opening 12.
  • said forced flow of air exterior E advantageously passes through said air inlet 3 to be used within said exterior unit 2, before being discharged as will be seen later.
  • the use of the forced flow of exterior air E by said exterior unit 2 advantageously involves heating or cooling of the latter.
  • the forced flow of exterior air E is preferentially heated or cooled by said exterior unit 2, and therefore said outgoing air flow S is preferably respectively colder or warmer than the forced air flow exterior E.
  • said first means of communication further comprises at least one first admission opening 12 provided at through the envelope 4 to allow the passage of the forced flow of exterior air E through the envelope 4.
  • the forced flow of exterior air E thus advantageously passes from the exterior of the envelope 4 to the interior of that this by passing through said first intake opening 12 thanks to the suction caused by said first electric intake fan 11 itself positioned within the envelope 4, the forced flow of exterior air E therefore being then sucked by and into said outdoor unit 2 through said air inlet 3.
  • the first electric intake fan 11 is preferably placed at a certain distance from said first intake opening 12.
  • the first electric fan d The inlet 11 is not located at the same altitude or at the same level as said first inlet opening 12, and does not face the latter either, whether in the horizontal plane or in the vertical plane.
  • said first electric intake fan 11 is preferably not located in said first intake opening 12.
  • the first electric intake fan 11 is advantageously positioned offset with respect to opposite said first intake opening 12. This configuration makes it possible to more effectively reduce the noise perceived outside generated by the first electric intake fan 11 and the outdoor unit 2.
  • said first intake opening 12 is provided through said lower wall 5.
  • This configuration is quite advantageous from an acoustic and practical point of view. In particular, this makes it possible on the one hand to further mask the noise of the air sucked in to operate the outdoor unit 2, and on the other hand to prevent unwanted external elements from falling into the first intake opening. 12 (and are sucked through the latter, or even interfere with the first electric intake fan 11). Finally, this configuration does not generate (or very little) any back pressure or particular pressure loss at the level of the first intake opening 12, the first electric intake fan 11 and/or the inlet of air 3.
  • the noise reduction device 1 further comprises a raising means (not illustrated) arranged under the envelope 4 to raise this last in relation to the ground on which it is placed.
  • said lower wall 5 is advantageously located at a distance from the ground, above the latter.
  • said heat pump unit 2 is designed to suck air through said air inlet 3 in a first direction P , as illustrated in figure 2 .
  • Said first direction P is advantageously orthogonal to a cross section of said air inlet 3.
  • Said first direction P is preferably parallel to the axis (of rotation) of any specific ventilation means of the outdoor unit 2.
  • Said first direction P is preferably substantially horizontal.
  • the first electric intake fan 11 is preferably designed to blow the forced flow of external air E within the envelope 4 in a direction (not illustrated, but advantageously horizontal) substantially intersecting, and preferably substantially perpendicular, with said first direction P.
  • said first means of communication is designed to suck in said forced flow of external air E (from the outside of the envelope 4) in a second direction D.
  • Said second direction D is advantageously orthogonal to a cross section of said first inlet opening 12.
  • Said second direction D is preferably substantially vertical.
  • said first means of communication is preferably designed to suck in said forced flow of external air E from the bottom of the envelope 4 (towards the top therefore), more preferably through said first intake opening 12 provided through said lower wall 5.
  • said first and second directions P , D are intersecting, and preferably substantially perpendicular to each other. Said first and second directions P , D are therefore advantageously neither merged nor parallel to each other.
  • the noise reduction device 1 is advantageously designed so that the forced flow of exterior air E enters successively into the envelope 4 in the second direction D then into the exterior unit 2 in the first direction P , so that said first and second directions P , D are intersecting, it is that is to say that the air enters the envelope 4 then into the outdoor unit 2 in different, distinct and non-parallel directions (and in substance intersecting and advantageously perpendicular).
  • the noise reduction device 1 is advantageously designed to force the forced flow of external air E to enter the envelope 4 through the first intake opening 12 in a secant direction, and preferably perpendicular, with that that the outside air takes to enter the outdoor unit 2 through the air inlet 3.
  • said outdoor heat pump unit 2 comprises an air outlet 13 for rejecting an outgoing air flow S out of said outdoor unit 2.
  • Said heat pump unit 2 is preferably designed to discharge heat air through said air outlet 13 in a third direction T , as illustrated in figure 2 .
  • Said third direction T is preferably substantially horizontal.
  • the outgoing air flow S corresponds in practice advantageously to the forced flow of outside air E after it has passed through the outdoor unit 2 and used by the latter. Generally, the outgoing air flow S has gained or lost heat compared to the forced flow of outside air E under the action of the outdoor unit 2.
  • Said external heat pump unit 2 preferably comprises a first side face 15, said air inlet 3 being arranged at the level of the latter.
  • Said first side face 15 advantageously extends substantially vertically.
  • Said first direction P is advantageously orthogonal to said first side face 15.
  • said exterior unit 2 comprises a second side face 16, said air outlet 13 being arranged at said second side face 16.
  • said second side face 16 is arranged opposite said first first side face 15.
  • Said second side face 16 advantageously extends substantially vertically.
  • Said third direction T is advantageously orthogonal to said second side face 16.
  • Said first and second side faces 15, 16 are preferably substantially parallel to each other, as illustrated in particular in figure 2 .
  • Said third direction T is preferably coincident or parallel with said first direction P.
  • the outdoor unit 2 is preferably designed to suck in “ unused ” outside air through said air inlet 3, and discharge “ used ” air through said air outlet 13, the suction and delivery being substantially carried out in the same direction (first direction P combined with the third direction T ) as illustrated in figure 2 .
  • Said noise reduction device 1 therefore preferably comprises at least a second means of communicating the interior of the envelope 4 with the exterior to allow said outgoing air flow S to be evacuated from said envelope 4.
  • Said second means of communication advantageously comprises at least a first discharge opening 14 provided through the envelope 4 to let said outgoing air flow S out of said envelope 4.
  • said first discharge opening 14 is provided through said upper wall 6.
  • This configuration is also advantageous from an acoustic and practical point of view. In fact, this configuration does not generate any particular back pressure or pressure loss at the air outlet 14, which makes it possible to avoid overconsumption or a loss of efficiency of the outdoor unit.
  • this configuration is generally preferable from an acoustic and practical point of view, since the noise generated by the discharge of air out of the outdoor unit 4 then out of the envelope 4 is directed and dispersed upwards. and not towards a possible obstacle (back pressure, loss of load), or a person, located next to the outdoor unit 2.
  • this last configuration in combination with that where the first intake opening 12 is provided at the level of the lower wall 5, is particularly advantageous because it avoids the phenomenon of recirculation or recycling of the air, also called aeraulic recycling, in which the air leaving the envelope 4 (through the first opening of discharge 14), after leaving the outdoor unit 2 (through the air outlet 13), re-enters the envelope 4 by being sucked into it (through the first intake opening 12) , then re-enters outdoor unit 2 (through air inlet 3).
  • the outdoor unit 2 draws in through the air inlet 3 only a little “unused ” air coming from the outside, but a lot of “ already used ” air coming from the outlet air 13.
  • the unused air is for example fresh air compared to the used air (warmer) in the case where the outdoor unit 2 is part of an air conditioning or refrigeration system.
  • the phenomenon of recirculation or recycling of air is therefore undesirable because it significantly reduces the efficiency of the outdoor unit 2, and increases the electrical consumption of the latter.
  • said second means of communication is designed to discharge said outgoing air flow S in a fourth direction Q.
  • Said fourth direction Q is advantageously orthogonal to a cross section of said first discharge opening 14.
  • Said fourth direction Q is preferably substantially vertical.
  • said second means of communication is preferably designed to discharge said outgoing air flow S upwards, through said first discharge opening 14 provided through said upper wall 6.
  • Said second and fourth directions D , Q are advantageously parallel and not confused.
  • the first intake opening 12 is very preferably distinct and distant from the first discharge opening 14.
  • said third and fourth directions T , Q are intersecting, and preferably substantially perpendicular to each other. Said third and fourth directions T , Q are therefore advantageously neither merged nor parallel to each other.
  • the noise reduction device 1 is advantageously designed so that the outgoing air flow S successively leaves the unit in the third direction T then leaves the envelope 4 in the fourth direction Q , so that said and third and fourth directions T , Q are intersecting, that is to say that the air leaves the outdoor unit 2 then the envelope 4 in different, distinct and non-parallel directions.
  • the noise reduction device 1 is advantageously designed to force the outgoing air flow S to leave the envelope 4 in a intersecting direction, and preferably perpendicular, with that which the outgoing air flow S takes to exit the outdoor unit 2.
  • said second means of communication comprises at least a first discharge fan 17 disposed inside the envelope 4 to promote the evacuation, out of said envelope 4, of said flow of outgoing air S.
  • Said first discharge fan 17 is thus advantageously designed to help the discharge, out of the envelope 4, of air evacuated by said external unit 2 (inside the envelope 4). Said first discharge fan 17 therefore promotes the exit of the outgoing air flow S from the envelope 4, independently or in combination with the action of any ventilation means specific to the outdoor unit 2.
  • Such a configuration makes it possible to facilitate the exit of the air used by the outdoor unit 2, firstly out of the latter, then out of said envelope 4, and this for very low electrical consumption, the first discharge fan 17 preferably being a simple and energy-efficient element, or even non-consuming of electrical energy as will be seen below.
  • this configuration makes it possible to avoid overconsumption of the external unit 2 and/or inefficient operation of the latter, since the air which it used to heat or cool its working fluid is efficiently evacuated to the outside of said envelope 4 instead of stagnating within the latter and generating load losses or back pressure, for example at the level of the air outlet 13 of the outdoor unit 2.
  • Said first discharge fan 17 is preferably arranged completely inside the envelope 4.
  • Said first discharge fan 17 is preferably completely separate from and/or placed away from one, several, or all of the side walls 7, 8, 9, 10, upper wall 6 and lower wall 5. Said first discharge fan 17 is very preferably not integrated into any of said walls 5, 6, 7, 8, 9, 10 of said envelope 4. The first discharge fan 17 is thus advantageously completely hidden from outside view by said envelope 4. In other words, said first discharge fan 17 is preferably invisible from the outside of the noise reduction device 1. Said first discharge fan 17 is for example arranged both away from and facing said second side wall 8 and/or said fourth side wall 10. Said first discharge fan 17 is in a particular configuration illustrated in particular in Figure 6 , arranged substantially parallel to said second side wall 8 and/or to said fourth side wall 10, and placed between these last two walls.
  • said first discharge fan 17 is advantageously arranged substantially perpendicular to the first and third side walls 7, 9, and/or to the lower walls 5 and upper 6.
  • Said first discharge fan 17 is for example placed at least 4 cm away, preferably at least 8 cm, more preferably at least 10 cm, at a distance from said second side wall 8 and/or from said fourth side wall 10. More generally, said first discharge fan 17 is for example placed at least 4 cm away. , preferably at least 8 cm, more preferably at least 10 cm, at a distance from any wall of the envelope 4 to which it faces or with which it is not arranged perpendicularly (side walls 8, 10 in the example of the Figure 6 ).
  • said envelope 4 delimits, thanks to its different walls 5, 6, 7, 8, 9, 10, an internal space (already mentioned previously) within which said first discharge fan 17 is located, more precisely in the second interior space (which will be defined below).
  • the first discharge fan 17 is placed away (preferably more than 4 cm) from all the side walls 7, 8, 9, 10, and very apart (preferably more than 10 cm) of the upper wall 6, but optionally has a lower edge pressed against the lower wall 5, to which it does not face and in relation to which it is in particular arranged perpendicularly.
  • the first discharge fan 17 can also be placed (slightly) away (for example, at least 1 cm) from said lower wall 5, above it.
  • the first discharge fan 17 is preferably placed at a certain distance from said first discharge opening 14.
  • the first discharge fan 17 is not located at the same altitude or at the same level as said first discharge opening 14 , and does not face the latter either, whether in the horizontal plane or in the vertical plane.
  • said first discharge fan 17 is preferably not located in said first discharge opening 14 (but is preferably positioned away from and offset from it).
  • Said first discharge fan 17 is preferably a helical fan (sometimes also called axial fan).
  • Said first discharge fan 17 thus advantageously comprises a ventilation wheel, which is according to a first embodiment, mounted to rotate freely relative to the envelope 4.
  • said ventilation wheel is preferably designed to rotate around an axis of rotation.
  • said first discharge fan 17 is electric.
  • the latter then advantageously comprises an electric motor to operate said ventilation wheel.
  • the latter is then preferably mounted to rotate relative to the casing 4 so as to rotate around said axis of rotation when said electric motor is actuated.
  • the outgoing air flow S when it leaves said external unit 2, is sufficient in itself to rotate said ventilation wheel, without actuation electric.
  • Said ventilation wheel is preferably formed by a propeller.
  • said outgoing air flow S is discharged from the outdoor unit 2 through said air outlet 13, within the envelope 4, then it reaches said first fan discharge 17 before being ejected out of said envelope 4 through said first discharge opening 14.
  • the ejection of the outgoing air flow S through said first discharge opening 14 is therefore preferentially favored by the action of said first discharge fan 17.
  • said envelope 4 comprises at least a first interior space, intended to receive the forced flow of exterior air E , and a second interior space, intended to receive the outgoing air flow S and distinct from said first interior space.
  • Said first and second interior spaces preferably do not communicate directly fluidically with each other (or else have a negligible fluidic connection in terms of air flow).
  • the first electric intake fan 11 (and/or the first intake silencer, defined below) is arranged within said first interior space, as illustrated in figures 3, 4 And 8 For example.
  • Said first interior space is preferably delimited at least in part by several of said walls 5, 6, 7, 8, 9, 10 of the envelope 4, as well as by the exterior unit 2 and/or by the entrance to air 3 of the latter.
  • the first delivery fan 17 (as well as the second delivery fan 26 described below, and/or the first discharge silencer, defined below) is/are arranged within said second interior space, as illustrated in figures 6 And 7
  • Said second interior space is preferably delimited at least in part by several of said walls 5, 6, 7, 8, 9, 10 of the envelope 4, as well as by the exterior unit 2 and in particular by the air outlet 13 of the latter.
  • the internal space (preferably delimited by all of the different walls 5, 6, 7, 8, 9, 10 of the envelope 4) comprises at least said first and second interior spaces.
  • the first interior space preferably comprises a first free, unencumbered zone between the first electric intake fan 11 and the air inlet 3, to allow the forced flow of exterior air downstream of said first fan to pass.
  • the first interior space preferably comprises a first zone obstructed, in particular by the first intake silencer, between said first intake opening 12 and the first electric intake fan 11 , which allows the forced flow of exterior air E to pass while reducing the perceived acoustic discomfort caused by both the exterior unit 2 and said first electric intake fan 11.
  • the second interior space preferably comprises a second free, unencumbered zone between the air outlet 13 and the first discharge fan 17 and, to allow the forced flow of external air downstream of said first electric intake fan 11 to pass towards said inlet air 3.
  • the first interior space preferably comprises a first area obstructed, in particular by the first intake silencer, between said first intake opening 12 and the first electric intake fan 11, which allows the forced flow to pass of outside air E while reducing the perceived acoustic discomfort caused by both the outdoor unit 2 and said first electric intake fan 11. , and possibly downstream of said first electric intake fan 11 towards said air inlet 3.
  • the noise reduction device 1 is advantageously designed so that within the envelope 4, the forced flow of outside air E and the outgoing air flow S are not mixed.
  • the forced flow of exterior air E and the outgoing air flow S are therefore found respectively in the first interior space and the second interior space, which first and second interior spaces are both located in the envelope 4 but physically separated from each other.
  • said first interior space and second interior space are separated from each other within said envelope 4 at least by said exterior unit 2.
  • said exterior unit 2 aims to avoid or at least significantly reduce the phenomenon of aeraulic recycling already mentioned.
  • said noise reduction device 1 further comprises at least one separation means 31 intended to be arranged within the envelope 4 to separate said first and second interior spaces from one another and thus limit or prevent the circulation of air between said first and second interior spaces.
  • Said separation means 31 is advantageously distinct from said exterior unit 2.
  • said separation means 31 is designed to be associated with said exterior unit 2, for example by attaching said separation means 31 both to the latter and to the envelope 4, so as to separate said first and second interior spaces from each other.
  • Said separation means 31 is preferably substantially airtight, and/or made of a substantially airtight material.
  • said separation means 31 comprises at least one flexible element 31 (flexible, unrollable and/or unfoldable for example), for example a canvas.
  • the flexible element 31 is advantageously formed by a glass fabric coated with at least one polymer, the latter being for example polyurethane.
  • Said flexible element 31 is advantageously designed to be attached on the one hand to the exterior unit 2 and on the other hand to the envelope 4 so as to be interposed between the first and second interior spaces.
  • the flexible element 31 is therefore advantageously designed to form a barrier between said first and second interior spaces, preferably at the level of said intervals.
  • the separation means 31 is designed to be associated with said exterior unit 2 in order to form an at least partly airtight barrier between said first and second interior spaces.
  • the separation means 31 may advantageously comprise attachment elements designed to attach, preferably in a reversible manner, the flexible element 31 to the envelope 4 and/or to the external unit 2.
  • Said attachment elements comprise, for example, example of self-gripping fastener elements (in particular of the complementary loop and hook type, Velcro ® for example), magnetic elements, screw-nut systems, etc.
  • Said separation means 31 is therefore advantageously removable, that is to say detachable from the envelope 4 and/or from the exterior unit 2, which in particular makes it possible to carry out maintenance of the exterior unit 2, repair the envelope 4 or check its tightness, etc.
  • the flexible element 31 may comprise several parts, for example, as illustrated in figures 9 and 10 , it can comprise at least two distinct parts arranged on either side of said external unit 2, at each of the sides thereof.
  • Each of said distinct parts is preferably designed to “ block ” a respective interval located between one side of said exterior unit 2 and the envelope 4 (more precisely a vertical surface of the latter).
  • the separation means 31 comprises a flexible element 31, preferably as described above, which flexible element 31 comprises a first part (on the left in the Figure 10 ) intended to be attached to and extended between a first (vertical) side wall of the exterior unit 2 and a (vertical) side wall of the envelope 4 (for example, the second side wall 8), and a second part ( to the right in the Figure 10 ) intended to be attached to and extended between a second (vertical) side wall of the exterior unit 2 and another (vertical) side wall of the envelope 4 (for example, the fourth side wall 10).
  • the separation means 31 illustrated in figures 9 and 10 is thus associated (that is to say attached) on the one hand with a portion of said envelope 4 (more precisely, according to a variant, with a half-portion of box carrying said first means of communication, as described below), and on the other hand with the external unit 2, on the other hand and on the other side of said air outlet 13.
  • the first flexible element 31 comprises two parts extending on either side of the outdoor unit 2, more precisely on either side of the second lateral face 16 of the outdoor unit 2, but it could also comprise parts extending at the top and bottom of the outdoor unit 2 up to the envelope 4.
  • Such a configuration makes it possible in particular to avoid the phenomenon of air recirculation or aeraulic recycling already mentioned above.
  • This latter configuration advantageously makes it possible to prevent the outgoing air flow S from the outdoor unit 2 (via said air outlet 13), or part of it, from entering the outdoor unit again. 2 (via said air inlet 12), the outgoing air flow S external 2 replacing in some way the forced flow of external air E.
  • the phenomenon of aeraulic recycling is particularly undesirable since this amounts to reuse air already used by the outdoor unit 2 (heating already heated air, or cooling already cooled air for example), which considerably reduces the efficiency of the latter and therefore increases its power consumption.
  • said flexible element 31 is designed to move from a rolled up and/or folded position, when the envelope 4 is not associated with the external unit 2, to an unrolled and/or unfolded position, when the The casing 4 accommodates the outdoor unit 2 and is associated with it, where said flexible element 31 extends between and is attached to the outdoor unit 2 and the casing 4 to form a screen (preferably at least partly watertight). air) between said first and second interior spaces.
  • said first means of communication comprises a first intake silencer which is arranged upstream of said first electric intake fan 11, so that said forced flow of external air E passes into said first intake silencer before reaching said first electric intake fan 11.
  • Said first intake silencer is preferably distinct from said envelope 4.
  • said first intake silencer is arranged inside of said envelope 4. Said first intake silencer thus makes it possible to reduce the noise generated outside the envelope 4 by the first electric intake fan 11, by the external unit 2 (on the side of its intake d air, at the level of said air inlet 3 in particular), and by the forced flow of external air E itself in particular when it passes into the envelope 4.
  • Said first intake silencer advantageously comprises a first intake pipe 18, 19, 20 which comprises at least two pipe portions 18, 19 having respective cross sections different from each other.
  • said two pipe portions 18, 19 are connected to each other by a connection portion 20 forming an abrupt modification of the cross section of the first intake pipe 18, 19, 20.
  • Said connection portion 20 forms for example a shoulder (of here generally square shape, but other shapes are possible) between said two pipe portions 18, 19.
  • Said connection portion 20 advantageously extends over less than 3 cm, more advantageously over less than one cm, along the first intake pipe 18, 19, 20.
  • Said connection portion 20 is obviously advantageously part of said first intake pipe 18, 19, 20.
  • one 18 of said two pipe portions 18 , 19 has a substantially rounded cross section, for example circular, oval or elliptical, while the other 19 of said two pipe portions 18, 19 has a substantially polygonal cross section, for example triangular, square, or rectangular.
  • one 18 of said two pipe portions 18, 19 has a circular section
  • the other 19 of said two pipe portions 18, 19 has a square section.
  • said first intake pipe 18, 19, 20 extends between said first intake opening 12 and said first electric intake fan 11.
  • Said first intake pipe 18, 19, 20 preferably comprises at least one or more distinct walls located at a distance from said envelope 4 (although within the latter). Said first intake pipe 18, 19, 20 is also advantageously located inside said envelope 4, preferably completely inside the latter. Said first intake pipe 18, 19, 20 preferably has a total internal volume equal to or greater than 0.5 liter (0.5 dm 3 ), more preferably equal to or greater than 1 liter (1 dm 3 ). It is advantageously not integrated into (that is to say inside) one of the walls of the envelope 4, although possibly one of the walls of the envelope 4 can constitute a portion of the first intake pipe 18, 19, 20.
  • the first intake silencer (and therefore the first intake pipe 18, 19, 20) therefore has a significant volume which advantageously separates the first intake opening 12 of the first electric intake fan 11. This makes it possible to attenuate the noise generated by the outdoor unit 2 (and incidentally by the first electric intake fan 11) perceived outside the noise reduction device 1 while by minimizing the pressure loss of the forced flow of outside air E, which makes it possible both to minimize the consumption of electrical energy and to operate the outdoor unit 2 correctly by supplying it sufficiently with outside air.
  • the pipe portion with a polygonal cross section 19 is preferably located upstream of the pipe portion with a rounded cross section 18.
  • the pipe portion with a rounded cross section 18 preferably has a cross section of area less than that of the portion of pipe with polygonal cross section 19.
  • the portion of pipe with rounded cross section 18 advantageously forms an elbow connecting said connection portion 20 and said first electric intake fan 11.
  • the first intake silencer advantageously further comprises at least one noise attenuation element 21 made of a porous material, said noise attenuation element being arranged within said first intake pipe 18, 19, 20, preferably within said pipe portion with polygonal cross section 19.
  • Said porous material is for example mineral wool.
  • the noise attenuation element 21 has for example the shape of a straight block or plate, arranged substantially in the middle of the pipe portion with polygonal cross section 19 to let the forced flow of external air E pass the along said noise attenuation element 21.
  • the noise attenuation element 21 makes it possible to significantly improve the reduction of the noise produced by the outdoor unit 2.
  • the noise attenuation element 21 is particularly illustrated in Figure 4 , in which part of the polygonal cross-section pipe portion 19 has been made transparent.
  • said first intake opening 12 opens onto said first intake pipe 18, 19, 20, and has an inlet cross section which is less than that of the pipe portion 19, for example the pipe portion to polygonal cross section 19, onto which said first intake opening 12 opens.
  • said first intake opening 12 has a round inlet cross section, significantly smaller than the cross section of the pipe portion with square cross section 19. This makes it possible to further optimize noise reduction.
  • said second means of communication comprises a first discharge silencer, which is arranged downstream of said first discharge fan 17, so that said flow of The outgoing air S passes into said first discharge silencer after having passed said first discharge fan 17.
  • Said first discharge silencer is preferably distinct from said envelope 4.
  • said first discharge silencer is arranged at the interior of said envelope 4. Said first discharge silencer thus makes it possible to reduce the noise generated outside the envelope 4 by the first discharge fan 17, by the external unit 2 (on the side of its exhaust of air, at the level of said air outlet 13 in particular), and by the outgoing air flow S itself in particular when it passes into the envelope 4.
  • Said first discharge silencer is advantageously as such noticeably similar to the first intake silencer.
  • Said first discharge silencer advantageously comprises a first discharge pipe 22, 23, 24, which comprises at least two pipe portions 22, 23 having respective cross sections different from each other.
  • said two pipe portions 22, 23 are connected to each other by a connection portion 24 forming an abrupt modification of the cross section of the first discharge pipe 22, 23, 24.
  • Said connection portion 24 forms for example a shoulder (of the shape here generally square, but other shapes are possible) between said two pipe portions 22, 23.
  • Said connection portion 24 advantageously extends over less than 3 cm, more advantageously over less than one cm, along the first delivery pipe 22, 23, 24.
  • Said connection portion 24 is obviously advantageously part of said first delivery pipe 22, 23, 24.
  • one 22 of said two pipe portions 22, 23 has a substantially rounded cross section, for example circular, oval or elliptical, while the other 23 of said two pipe portions 22, 23 has a substantially polygonal cross section, for example triangular, square, or rectangular.
  • one 22 of said two pipe portions 22, 23 has a circular section
  • the other 23 of said two pipe portions 22, 23 has a square section.
  • said first discharge pipe 22, 23, 24 extends between said first discharge opening 14 and said first electric discharge fan 17.
  • the pipe portion with polygonal cross section 23 is located preferably upstream of the pipe portion with rounded cross section 22.
  • the pipe portion with rounded cross section 22 preferably has a cross section of area smaller than that of the pipe portion with polygonal cross section 23.
  • the pipe portion with rounded cross section 22 advantageously forms an elbow connecting said connection portion 24 and said first discharge fan 17.
  • the first discharge silencer advantageously further comprises at least one noise attenuation element (not visible in the figures , but preferably similar to the noise attenuation element already mentioned above), made of a porous material, said noise attenuation element being arranged within said first delivery pipe 22, 23, 24, preferably within said pipe portion with polygonal cross section 23.
  • Said porous material is for example mineral wool.
  • the noise attenuation element has for example the shape of a straight block or plate, arranged substantially in the middle of the pipe portion with a polygonal cross section 23 to let the outgoing air flow S pass along said element. noise attenuation.
  • This latter configuration also makes it possible to significantly improve the reduction of the noise produced by the external unit 2.
  • said first discharge opening 14 opens onto said first discharge pipe 22, 23, 24, and has an inlet cross section which is less than that of the pipe portion 23, for example the pipe portion with polygonal cross section 23, onto which said first discharge opening 14 opens.
  • said first discharge opening 14 has a round inlet cross section, significantly less than the cross section of the pipe portion with square cross section 23. This makes it possible to further optimize the noise reduction.
  • Said first discharge pipe 22, 23, 24 preferably comprises at least one or more distinct walls located at a distance from said envelope 4 (although within the latter). Said first discharge pipe 22, 23, 24 is also advantageously located inside said envelope 4, preferably completely inside the latter. Said first discharge pipe 22, 23, 24 preferably has a total internal volume equal to or greater than 0.5 liter (0.5 dm 3 ), preferably equal to or greater than 1 liter (1 dm 3 ). It is advantageously not integrated into (that is to say inside) one of the walls of the envelope 4, although possibly one of the walls of the envelope 4 can constitute a portion of the first discharge pipe 22, 23, 24.
  • said first means of communication further comprises at least one second electric intake fan 25 disposed inside the casing 4 to supply said inlet air 3 with said forced flow of external air E.
  • Said second electric intake fan 25 is preferably substantially similar, in its function and its structure, to the first electric intake fan 11, so that what has been mentioned for the latter is preferably also valid for the second electric intake fan 25.
  • Said forced flow of external air E is then formed by the air sucked in by said first and second electric intake fans 11, 25, without that this modifies the general principle of the invention.
  • Said first and second electric intake fans 11, 25 are preferably distinct, and arranged within the envelope 4 opposite each other (they preferably blow air towards each other). other within the envelope 4, the air inlet 3 being substantially between them).
  • said first means of communication further comprises at least one second intake opening 29 provided through the envelope 4 to allow the forced flow of exterior air E to pass through the envelope 4.
  • the forced flow of exterior air E thus advantageously passes from the exterior of the envelope 4 to the interior thereof by passing through said second intake opening 29 ( in addition to passing through the first intake opening 12 as described above) thanks to the suction caused by said second electric intake fan 25 itself positioned within the envelope 4.
  • said second means of communication further comprises at least one second discharge fan 26 disposed inside the envelope 4 to promote evacuation, outside of said envelope 4, of said outgoing air flow S.
  • Said second discharge fan 26 is preferably substantially similar, in its function and its structure, to the first discharge fan 17, so that what has been mentioned for the latter is preferably also valid for the second discharge fan 26.
  • Said outgoing air flow S is then formed by the air discharged by said first and second discharge fans 17, 26, without this modifying the general principle of the invention.
  • Said first and second discharge fans 17, 26 are preferably arranged within the envelope 4 opposite each other (within the envelope 4, they preferably suck in air away from each other on the other, the air outlet 13 being substantially between them).
  • Said second means of communication advantageously further comprises at least a second discharge opening 30 provided through the envelope 4 to let said outgoing air flow S out of said envelope 4.
  • the ejection of the air flow exiting S through said second discharge opening 30 is therefore preferentially favored by the action of said second discharge fan 26.
  • said first means of communication further comprises a second intake silencer which is arranged upstream of said second electric intake fan 25, so that said forced flow of external air E passes through said second intake silencer before reaching said second electric intake fan 25.
  • Said second intake silencer is preferably substantially similar, in its function and its structure, to the first silencer intake, so that what has been mentioned for the latter is preferably also valid for the second intake silencer.
  • Said second intake silencer therefore advantageously comprises a second intake pipe 27, the latter preferably extending between said second intake opening 29 and said second electric intake fan 25.
  • Said second intake pipe 27 is preferably substantially similar, in its function and its structure, to the first intake pipe 18, 19, 20.
  • said second means of communication further comprises at least one second discharge silencer, which is arranged downstream of said second discharge fan 26, to that said outgoing air flow S passes into said second discharge silencer after having passed said second discharge fan 26.
  • Said second discharge silencer is preferably substantially similar, in its function and its structure, to the first discharge silencer, of so that what was mentioned for the latter is preferably also valid for the second discharge silencer.
  • Said second discharge silencer therefore advantageously comprises (similar to the first discharge pipe 22, 23, 24), a second discharge pipe 28, the latter preferably extending between said second discharge opening 30 and said second fan discharge pipe 26.
  • Said second discharge pipe 28 (which therefore advantageously opens onto said second discharge opening 30) is preferably substantially similar, in its function and its structure, to the first discharge pipe 22, 23, 24.
  • said envelope 4 comprises at least two distinct pre-assembled box portions designed to be attached to each other around said exterior unit 2 in order to enclose the latter, each box portion comprising at least four walls of box, preferably comprising five box walls, each box wall each forming a respective face of a straight block.
  • one of said box portions carrying said first means of communication.
  • another of said box portions carries said second means of communication.
  • each box portion forms a half-box portion, and one of said half-box portions carries said first means of communication while the other of said half-portions of box carries said second means of communication. communication.
  • one of the box portions preferably the half-portion which carries said first means of communication, comprises at least the first side wall 7, a part of the second and fourth lower side walls 8, 10, a part of the upper wall 6, and possibly at least part of the lower wall 5.
  • the other of said box portions preferably the half-portion which carries said second means of communication, comprises at least the third wall side wall 9, a part of the second and fourth lower side walls 8, 10, a part of the upper wall 6, and optionally at least part of the wall lower 5.
  • one of the box portions preferably the half-portion which carries said first means of communication, carries said separation means 31.
  • said envelope 4 is, with the exception of said (first and second) inlet opening(s) 12, 29 and/or outlet 14, 30, substantially airtight.
  • the noise reduction device 1 can also include seals to ensure the tightness of said envelope 4, for example elastomer/rubber seals to ensure the sealing of electrical cable passages, refrigerant pipes, external probes, etc. connecting the outdoor unit 2, inside the envelope 4, with the exterior of the envelope 4, and in particular with the internal heat pump unit.
  • the noise reduction device 1 further comprises electrical connection means (not illustrated) designed to connect said first electric intake fan 11 to said heat pump exterior unit 2, to adapt the forced flow of outside air E to the needs of said outdoor unit 2.
  • said electrical connection means preferentially connects said first electric intake fan 11 to said outdoor unit 2 to control the first electric intake fan 11 to said unit exterior 2, and more precisely to control the operating speed of the first electric intake fan 11 to the operation of the outdoor unit 2.
  • said electrical connection means advantageously electrically connects said electric intake fan 11 and outdoor unit 2 so that when the latter increases or decreases its outside air requirements, the operating speed of the electric intake fan 11 is adapted accordingly.
  • the electric intake fan 11 therefore advantageously has an operating speed which depends, thanks to said electrical connection means, on the outside air requirements of said outdoor unit 2.
  • Said electrical connection means is preferably designed to transmit a signal from said unit exterior 2 towards said first electric intake fan 11, said signal comprising for example information relating to the outdoor air requirements of said outdoor unit 2.
  • Said information includes for example an operating speed and/or an electrical consumption of said outdoor unit 2, or even a set temperature (in particular a temperature of instruction given for a room to be cooled or heated by the heat pump of which the outdoor unit 2 is a part.
  • the electrical connection means communicates this information to the electric intake fan 11, which is then preferably also stopped.
  • the electrical connection means communicates this information to the electric intake fan 11, which then advantageously increases its operating speed, which preferably also increases the flow rate of the forced flow of air. outside air E.
  • the electrical connection means advantageously makes it possible to monitor and adjust in real time the operation of the electric intake fan 11 according to a parameter of the outdoor heat pump unit 2, such as energy consumption and/or needs. in outside air of the outdoor unit 2.
  • Said outdoor unit 2 thus advantageously comprises an electronic card (not shown) designed to electronically control an operating parameter of said outdoor unit 2, for example its operating speed, its flow rate (for example air or working fluid), its electrical consumption, etc.
  • Said electrical connection means is therefore advantageously designed to connect said first electric intake fan 11 to said electronic card in order to control the first electric intake fan 11 to said external unit 2, and more precisely to control the operating speed of the first electric intake fan 11 to said operating parameter of the outdoor unit 2.
  • the forced air flow of outside air E is divided, since part of the latter advantageously passes, in the same way as previously, through the second intake opening 29, the second silencer intake, the second electric intake fan 25, etc.
  • the outgoing air flow S is divided, since part of the latter advantageously passes, in the same way as previously, by the second discharge fan 26, the second discharge silencer, the second discharge opening 30, etc.
  • the noise reduction device 1 can easily be adapted and/or designed for different types of heat pump outdoor unit 2.
  • the figures 1 to 6 relate to a heat pump assembly, a noise reduction device 1 and/or an outdoor unit 2 where the latter comprises a single exhaust ventilation means, that is to say a single ventilation means for rejecting the flow of air leaving S out of said outdoor unit 2 through said air outlet 13.
  • the figures 7 and 8 on the other hand concern a heat pump assembly with an outdoor unit 2 with two exhaust ventilation means, also called double exhaust fans, that is to say that the outdoor unit 2 comprises, in the variant illustrated by these figures 7 and 8 , two ventilation means (one above the other) for rejecting the outgoing air flow S out of said outdoor unit through said air outlet 13.
  • Such an air outlet 13 with double fans rejection is thus illustrated in the figure 7
  • an air inlet 3 adapted to such a variant is illustrated in figure 8 .
  • the heat pump assembly of the invention is advantageously easier to develop outside of its technical use (that is to say its function linked to that of a heat pump), in particular because the openings of The inlet 12, 29 and outlet 14, 30 are preferably either hidden (for example the inlet openings 12, 29 when they are made in the lower wall 5), or barely visible and limited in terms of size relative to the heat pump assembly, due in particular to their position and/or their size (for example the discharge openings 14, 30 when they are made in the upper wall 6, preferably at the level of small portions of this last).
  • This is in particular made possible by controlling the direction of the entry or exit of the air flows within the heat pump assembly (forced flow of outside air E and flow of outgoing air S ).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
EP23213154.0A 2022-11-30 2023-11-29 Vorrichtung zur reduzierung des lärms einer ausseneinheit einer wärmepumpe und wärmepumpenanordnung dafür Pending EP4379270A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2212581A FR3142536A1 (fr) 2022-11-30 2022-11-30 Dispositif de reduction du bruit d’une unite exterieure de pompe a chaleur, et ensemble de pompe a chaleur afferent

Publications (1)

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EP4379270A1 true EP4379270A1 (de) 2024-06-05

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EP23213154.0A Pending EP4379270A1 (de) 2022-11-30 2023-11-29 Vorrichtung zur reduzierung des lärms einer ausseneinheit einer wärmepumpe und wärmepumpenanordnung dafür

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EP (1) EP4379270A1 (de)
FR (1) FR3142536A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006129891A2 (en) * 2005-05-31 2006-12-07 Lg Electronics, Inc. Outdoor unit for split type air-conditioner
US20140260396A1 (en) * 2013-03-15 2014-09-18 Garth Dale Solar powered a/c saver and utility shed
EP3147582A1 (de) * 2015-09-28 2017-03-29 Solflex HandelsgmbH Schalldämmgehäuse
FR3060718A1 (fr) * 2016-12-15 2018-06-22 Marco Zambolin Unite de generation de flux et installation de traitement d'air comprenant ladite unite de generation de flux
CN109654610A (zh) * 2019-01-28 2019-04-19 唐山学院 一种空气源热泵室外机保护结构及其控制系统和控制方法
CN111189128A (zh) * 2020-01-20 2020-05-22 重庆华光环境工程设备有限公司 一种空调室外机用消声隔音设备安装工艺
EP4040081A1 (de) * 2021-02-04 2022-08-10 CoxGeelen B.V. Schallisolierungsgehäuse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006129891A2 (en) * 2005-05-31 2006-12-07 Lg Electronics, Inc. Outdoor unit for split type air-conditioner
US20140260396A1 (en) * 2013-03-15 2014-09-18 Garth Dale Solar powered a/c saver and utility shed
EP3147582A1 (de) * 2015-09-28 2017-03-29 Solflex HandelsgmbH Schalldämmgehäuse
FR3060718A1 (fr) * 2016-12-15 2018-06-22 Marco Zambolin Unite de generation de flux et installation de traitement d'air comprenant ladite unite de generation de flux
CN109654610A (zh) * 2019-01-28 2019-04-19 唐山学院 一种空气源热泵室外机保护结构及其控制系统和控制方法
CN111189128A (zh) * 2020-01-20 2020-05-22 重庆华光环境工程设备有限公司 一种空调室外机用消声隔音设备安装工艺
EP4040081A1 (de) * 2021-02-04 2022-08-10 CoxGeelen B.V. Schallisolierungsgehäuse

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