EP3705731B1 - Ausseneinheit für eine wärmepumpe umfassend ein mehrteiliges schutzgitter - Google Patents

Ausseneinheit für eine wärmepumpe umfassend ein mehrteiliges schutzgitter Download PDF

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Publication number
EP3705731B1
EP3705731B1 EP19161584.8A EP19161584A EP3705731B1 EP 3705731 B1 EP3705731 B1 EP 3705731B1 EP 19161584 A EP19161584 A EP 19161584A EP 3705731 B1 EP3705731 B1 EP 3705731B1
Authority
EP
European Patent Office
Prior art keywords
grille
parts
casing
outdoor unit
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19161584.8A
Other languages
English (en)
French (fr)
Other versions
EP3705731A1 (de
Inventor
Kota Yoshikawa
Wim Vansteenkiste
Akshay Hattiangadi
Jose Daniel Garcia Lopez
Tom Surmont
Rishi Mehta
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.)
Daikin Europe NV
Daikin Industries Ltd
Original Assignee
Daikin Europe NV
Daikin Industries Ltd
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 Daikin Europe NV, Daikin Industries Ltd filed Critical Daikin Europe NV
Priority to EP19161584.8A priority Critical patent/EP3705731B1/de
Priority to PCT/JP2020/009890 priority patent/WO2020184493A1/en
Publication of EP3705731A1 publication Critical patent/EP3705731A1/de
Application granted granted Critical
Publication of EP3705731B1 publication Critical patent/EP3705731B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • 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
    • F24F1/46—Component arrangements in separate outdoor units
    • F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
    • F24F1/54—Inlet and outlet arranged on opposite sides
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the present disclosure relates to heat pumps for cooling and/or heating purposes.
  • the disclosure relates to split-type heat pumps comprising an outdoor unit and at least one indoor unit.
  • the disclosure relates to a heat pump using air as heat source.
  • Outdoor units of air heat pumps comprise a casing accommodating a portion of the refrigerant circuit of the heat pump, including a heat source heat exchanger, and a fan for inducing an air flow through the heat source heat exchanger enabling heat exchange between the air flow and a refrigerant flowing through the heat source heat exchanger.
  • the fan has fan blades rotatable about an axis of rotation.
  • a grille or fan guard is provided covering the fan blades.
  • An example showing such an outdoor unit may be found in EP 3 348 842 A1 .
  • outdoor units were in the past primarily arranged in hidden locations, such as on the roofs of buildings, the outdoor units are nowadays often installed in front of residential buildings and sometimes even right beside the front door.
  • the outdoor units tend to become larger and/or the grille covers an entire front of the outdoor unit. This leads to an increased size of the grille.
  • the will is manufactured in an injection molding process. In case the grille becomes larger, the problem arises that it is in some cases no longer possible to mold the grille in a standard injection molding machine. The use of specified machines, however, will increase the costs. In addition large injection molded pieces tend to large tolerances and weak spots.
  • DE 10 2016 218 233 A1 discloses an outdoor unit for a heat pump having a grille forming the basis for the preamble of claim 1.
  • Another outdoor unit in which the grille is made from wire rods is disclosed in EP 2 549 194 A1 .
  • an outdoor unit for a heat pump comprising a refrigerant circuit
  • the refrigerant circuit may at least comprise a heat source heat exchanger disposed in the outdoor unit, a heat consumer heat exchanger, disposed in the indoor unit, an expansion valve and a compressor connected by refrigerant pipes.
  • the outdoor unit comprises a casing (may also be referred to as outer casing).
  • the casing has a front and may have a bottom, a top and opposite sides.
  • a fan is accommodated in the casing, the fan having fan blades rotatable about an axis of rotation, and a grille (may also be referred to as fan guard) covers the fan blades.
  • the grille comprises a plurality of openings allowing air to pass the grille. To put it differently, air is sucked in or blown out through the openings in a fan portion of the grille by the air flow generated by the fan.
  • a bell mouth may be provided having an air flow opening, such as a circular airflow opening, centered relative to the axis of rotation of the fan blades.
  • the grille may at least cover the air flow opening of the bell mouth.
  • An outer surface of the grille may be outwardly curved.
  • the outer surface is curved from the left to the right and one may see the curvature in a top view of the outdoor unit.
  • the outer surface may be continuously curved in at least one direction such as a horizontal direction.
  • an inner surface of the grille may be curved parallel to the outer surface.
  • the grille comprises at least two separate parts, wherein each of the parts comprises at least one of the plurality of openings (i.e. a part of the fan portion).
  • each of the parts comprises at least one of the plurality of openings (i.e. a part of the fan portion).
  • at least some of the openings of the fan portion are located in one of the parts and some of the openings of the fan portion are located in the other one of the parts.
  • the grille comprises a hub portion, the hub portion being arranged, in a view perpendicular to the front, in a region corresponding to a fan hub, the hub portion comprising a closed surface, wherein each of the parts comprises a part of the hub portion.
  • the hub portion may be relatively thick in a direction parallel to the axis of rotation of the fan blades thus providing sufficient strength and rigidity.
  • the hub portion may comprise an opening or openings but a major proportion of the hub portion has the closed surface.
  • An inner surface of the hub portion may protrude from the inner edge of at least some of the ribs towards the hub of the fan thus providing for a sufficient rigidity in this portion. Accordingly, the strength of the grille may be further enhanced in that it becomes possible to also connect the two parts to each other in the hub portion because the hub portion comprises a sufficiently strong closed surface.
  • the grille is horizontally separated into the two parts comprising an upper part and a lower part.
  • the line of separation extends from the left to the right and, hence in a horizontal direction.
  • the line of separation is a horizontal line.
  • the openings in the fan portion extends from the bottom to the top of the casing with only small portions of the grille having a closed surface at the very top and the very bottom, it is difficult to connect the two parts in these portions and achieve the necessary strength of the grille. Yet, by horizontally separating the grille, the two parts may be connected at the left and at the right so that a desired strength may be realized.
  • the test probe is pressed against the grille with a force of 5N for a normal finger probe and 2.5N for a small finger probe. The grille has to withstand these forces against a front face of the grille.
  • the casing is in a view perpendicular to the grille separated into a machine chamber and a heat exchanging area, the heat exchanging area comprising the fan and the machine chamber comprising components of the refrigerant circuit of the heat pump, wherein the grille has the fan portion comprising the plurality of openings allowing air to pass the grille and a machine chamber portion having a closed surface, the machine chamber portion corresponding to the portion of the machine chamber, wherein each of the parts comprising a part of the machine chamber portion.
  • the grille may resemble a front panel of the casing.
  • the grille provides for an improved outer appearance of the entire outdoor unit.
  • one of the parts has, in the part of the hub portion, an engagement member and the other of the parts has, in the part of the hub portion an engaging member being engaged with the engagement member.
  • one of the parts has, in the part of the machine chamber portion, an engagement member and the other of the parts has, in the part of the machine chamber portion, an engaging member being engaged with the engagement member.
  • the engagement member/-s and the engaging member/-s at least form fittingly fix the two parts to each other in a direction perpendicular to the front of the casing.
  • the test probe is pressed against the grille with a force of 5N for a normal finger probe and 2.5N for a small finger probe.
  • the form fit of this aspect that provides strength to the grille at the connection between the two parts so that the test may be performed without the two parts separating from each other at the connection.
  • one of the parts has, in the part of the hub portion and/or in the part of the machine chamber portion, a fixation member and the other of the parts has, in the part of the hub portion and/or in the part of the machine chamber portion, a fixing member being engaged with the fixation member to fix the two parts to each other.
  • the grille extends from one side of the casing to another opposite side of the casing.
  • the casing is, in a front view on the grille, not visible at the opposite sides.
  • the grille extends at least to the opposite sides (edges) of the casing.
  • the grille may even extend a short distance past the opposite sides (edges) of the casing.
  • the grille may extend from one side of the casing to another opposite side of the casing in a horizontal direction.
  • the grille may extend from one side of the casing to another opposite side of the casing in a vertical direction.
  • the grille extends from one side of the casing to another opposite side of the casing in a vertical direction and in a horizontal direction.
  • the grille may resemble a front panel of the casing.
  • the grille provides for an improved outer appearance of the entire outdoor unit.
  • the two parts are independently fixed at the casing.
  • the two parts are fixed to each other independent from the casing.
  • This aspect provides for the advantage that the visual alignment between the two parts is increased for improved visual appearance and that the strength for the finger test is increased between the parts.
  • FIG. 1 shows a perspective view of an outdoor unit 10 of a split type heat pump.
  • the heat pump comprises a refrigerant circuit, at least comprising a heat source heat exchanger 30, a compressor (not visible), a heat consumer heat exchanger (not shown), such as an indoor heat exchanger, and an expansion valve connected by refrigerant pipes.
  • the shown outdoor unit 10 comprises a casing 11.
  • the casing 11 has a bottom plate 12.
  • Feet 13 (see figure 2A ) for mounting the outdoor unit on a horizontal surface or via brackets to a vertical wall are fixed to the bottom plate 12.
  • the casing 11 has a top plate 14 and a side plate 15.
  • the side plate 15 extends around a rearward corner of the outdoor unit 10 being connected to (integrally formed with/forming a one piece structure with) a back plate 16 of the casing 11.
  • the heat source heat exchanger 30 occupies a part of the rear side of the casing 11 and the side of the casing 11 opposite to the side plate 15.
  • the heat source heat exchanger 30 is "L" - shaped in a top view.
  • the front side of the casing 11 is closed by a front plate 17 and a bell mouth 18.
  • the front plate 17 also extends around the forward corner of the casing 11 forming part of the side of the casing 11.
  • the bell mouth 18 defines an air flow opening 19 (see also figure 2A ). In the shown embodiment, the air flow opening 19 is circular.
  • the casing 11 is separated by a partition wall 20 into a machine chamber 21 and an air chamber 22 (heat exchanging area).
  • the separation is in a horizontal direction, that is from the left to the right, wherein the machine chamber 21 is disposed on the right and the air chamber 22 is disposed on the left.
  • the machine chamber 21 is, thus, formed by the back plate 16, the side plate 15, the front plate 17 and the partition wall 20.
  • the air chamber 22 is formed by the heat source heat exchanger 30, the bell mouth 18 and the partition wall 20.
  • the machine chamber 21 may accommodate components of the refrigerant circuit such as the compressor and the expansion valve and/or portions of the control of the heat pump.
  • the heat source heat exchanger 30 may at one end extend into the machine chamber 21 so as to connect refrigerant pipes of the heat source heat exchanger 30 to the remainder of the refrigerant circuit.
  • the casing 11 further accommodates a fan 50.
  • the fan 50 is accommodated in the air chamber 22. More particularly, the fan 50 is supported on the bottom plate 12 via a support structure 51.
  • a fan motor 52 is mounted to the support structure 51.
  • the fan 50 further comprises a fan rotor 53 having a fan hub 54 mounted to the fan motor 52.
  • a plurality of fan blades 55 extend radially outwardly from the fan hub 54.
  • the fan rotor 53 and, hence, the fan blades 55 are rotatable about an axis of rotation 56 by the fan motor 52.
  • the fan 50 is mounted with the axis of rotation 56 concentric to the air flow opening 19 of the bell mouth 18. Even further and as apparent from figure 3A , the bell mouth 18 has an annular rim 23 at the circumference of the air flow opening 19. The fan blades 55 partly enter the rim 23 of the bell mouth 18.
  • a grille 100 is, as a fan guard, attached to the casing 11 opposite to the back plate 16/a back side of the casing 11 at a front side of the casing 11.
  • the grille 100 is mounted to the bell mouth 18 and the front plate 17.
  • One purpose of the grille 100 is to meet e.g. the standard EN 60335-1:2012, relating to finger safety, that is to prevent that a finger comes into contact with the fan blades 55 of the fan 50 and consequently to avoid injuries.
  • an outer surface 101 of the grille 100 is outwardly curved (see top view in figure 3A and 3B ).
  • the distance D minimum distance between the fan blades 55 and the outer surface 101 of the grille 100 differs at different locations of the outer surface 101.
  • the distance D differs along the horizontal direction (from the left to the right) in which the outer surface 101 is curved.
  • the distance D between the fan blades 55 and the outer surface 101, particularly the minimum distance is indicated in figure 3B .
  • the distance D is defined as the distance of that point on the fan blades 55, which is closest to the outer surface 101 of the grille 100, to the outer surface 101 of the grille 100.
  • the maximum distance D Max is offset relative to the axis of rotation 56 to the right and, hence, situated in the area A2 (see later).
  • Finger safety according to the standard EN 60335-1:2012 may, on the one hand, be achieved by defining a sufficiently large safety distance between the outer surface 101 of the grille 100 and the fan blades 55.
  • the grille 100 is divided into a fan portion 110 covering the fan 50 or more particularly the bell mouth 18 and a machine chamber portion 111 covering a portion of the casing 10 defining the machine chamber 21.
  • the grille 100 comprises, in the fan portion 110, at least in the area of the air flow opening 19, a plurality of openings 102.
  • the openings 102 allow air to flow through the grille 100 and, hence, through the heat source heat exchanger 30.
  • the size of the openings 102 influences the flow resistance of the air flow through the grille 100.
  • the smallest dimension of the openings 102 is additionally limited by the standard EN 60335-1:2012 relating to finger safety.
  • the outer surface 101 is particularly defined by a front edge 103 of a plurality of parallel horizontal ribs 104 (first horizontal ribs).
  • the horizontal ribs 104 are equally distanced to each other and extend over the entire front of the grille 100. Hence, one may consider the front edges 103 of the horizontal ribs 104 to be outwardly curved relative to a plane defined by the most forward point on each of the fan blades 55.
  • the openings 102 are formed by a plurality of vertical ribs 105 (second vertical ribs) extending between two adjacent horizontal ribs 104.
  • the vertical ribs 105 also extend substantially parallel to each other. In this context “substantially” means that due to the curvature, a slight deviation from the parallel orientation between the vertical ribs 105 may occur. In particular, if a front edge 106 of the vertical ribs 105 is always oriented parallel to the front edge 103 of the horizontal ribs 104, the vertical ribs 105 will not be perfectly parallel to each other.
  • the vertical ribs 105 comprise smaller ribs 107 and the larger ribs 108.
  • the smaller ribs 107 have a smaller depth in the direction of or parallel to the direction of the axis of rotation 56 than the larger ribs 108.
  • the front edge 106 of the smaller ribs 107 is displaced towards the back with respect to the front edges 106 of the larger ribs 108 relative to the front edge 103 of the horizontal ribs 104.
  • the smaller ribs 107 are not visible, enhancing the entire outer appearance of the grille 100 and, therefore, the outdoor unit 10.
  • the larger ribs 108 are in a vertical direction not aligned. Rather, larger ribs 108 in adjacent rows in a vertical direction are offset to each other in the horizontal direction. Thus, any strict geometric arrangement of the ribs is diluted and the outer appearance is enhanced.
  • the distances between adjacent smaller ribs 107 are different over the entire front of the grille 100.
  • the distances between smaller ribs 107 between two adjacent larger ribs 108 in the horizontal direction may be the same.
  • the distances between adjacent larger ribs 108 may be the same over the entire front of the grille 100.
  • the outer appearance is, hence, dominated by the larger ribs 18. Again this has an influence on and improves the outer appearance of the outdoor unit 10.
  • the openings are defined by the horizontal ribs 104 and the vertical ribs 105 and are rectangular, particularly slot shaped.
  • the smallest dimension of the openings 102 in regard of finger safety is in the present example defined by the distance between adjacent vertical ribs 105.
  • test probes as defined in IEC 61032 are used.
  • a test probe B as defined in IEC 61032 as normal finger test probe (resembling fingers as of the age of 14 and older)
  • a test probe 18 as defined in IEC 61032 as small finger test probe (resembling fingers as of the age of 3 until the age of 14) are used.
  • the test probe is pressed against the grille with a force of 5N for the normal finger probe and 2.5N for the small finger probe.
  • the outer surface 101 of the grille 100 is curved so that the distance D between the fan blades 55 and the outer surface 101 of the grille 100 differs.
  • the grille 100 has in its fan portion 110 two areas A1 and A2.
  • the areas A1 and A2 are separated by a vertical line, which may be centered on the axis of rotation 56 of the fan 50 (see figure 2A ).
  • the distance D is larger than a first threshold, wherein the first threshold represents the required safety distance for both a first group of humans, such as humans from the age of 3 to 14 (children) and a second group of humans, such as humans from the age of 14 and older (adults).
  • the first threshold may be 80.0 mm ( ⁇ 0.2mm tolerance).
  • the size of the openings may be "freely" selected as regards the smallest dimension at a minimum safety distance of the first threshold.
  • the distance between the vertical ribs 105 is not of high relevance in the area A2 and may be larger.
  • the distance D is not more than the first threshold, but may be selected to be larger than a third threshold.
  • the third threshold represents the required safety distance for humans from the age of 3 to 14 (children).
  • the third threshold may be 57.9mm ( ⁇ 0.15mm tolerance).
  • the safety distance D in the area A1 is not sufficient for humans from the age of 14 and older (adults). Accordingly, the smallest dimension of the openings 102 must be reduced to meet the standard for finger safety.
  • the smallest dimension of the openings 102 is selected to be not more than a second threshold.
  • the second threshold represents the maximum allowable smallest dimension for openings if the safety distance for humans from the age of 14 and older (adults) is not met or not more than the first threshold.
  • the second threshold may be 12mm +0.00/- 0.05.
  • the finger safety for both children and adults is achieved by both the distance D (for children) and the smallest dimension of the openings 102 (for adults) .
  • the finger safety for both children and adults is achieved by mainly the distance D.
  • the distance between the vertical ribs 105 differs between the area A1 and the area A2.
  • the distance between adjacent vertical ribs gradually changes (increases) at least in the first area A1 towards the second area A2.
  • the distance between adjacent vertical ribs 105 may gradually increase over the entire fan portion 110 in the horizontal direction from the first area A1 to the second area A2, that is from the left to the right in the present embodiment.
  • “gradually increase” does not necessarily mean that the distance between each and every adjacent vertical ribs 105 needs to change.
  • the distance between smaller ribs 107 arranged between two adjacent larger ribs 108 may be the same.
  • “gradually” also encompasses that the distance between the vertical ribs changes in groups.
  • the grille 100 has in its machine chamber portion 111 a closed surface 112 without openings 10 and 2.
  • the horizontal ribs 104 also extend into and over the machine chamber portion 111.
  • the grille 100 has a hub portion 109 corresponding to the fan hub 54 in which no or less openings 102 are provided.
  • figure 5 represents that the grille 100 in the example consists of a first part 113 and a second part 114. This particularly simplifies the molding process of the grille 100.
  • each part 113 and 114 is smaller as compared to the entire grille 100. Accordingly, the parts 113 and 114 may be manufactured in a standard injection molding machine and small tolerances and fewer weak points may be achieved.
  • the two parts 113 and 114 are separated along a horizontal line of separation 119 ( figure 5 ) into an upper part 113 and a lower part 114.
  • engagement members 115 and engaging members 116 as well as fixation members 117 and fixing members 118 are provided on the upper part 113 and the lower part 114, respectively.
  • the engagement members 115 and engaging members 116 primarily serve for a better alignment of the parts 113 and 114 to each other, support the aesthetic appearance of the grille 100 and compensate for tolerances of the two parts 113, 114 resulting from the molding process.
  • the engagement members 115 and engaging members 116 serve to increase the strength of the grille 100 in a direction perpendicular to the front of the grille 100.
  • the engagement members 115 and engaging members 116 are engaged in order to create a form fit between them in a direction along the axis of rotation 56 of the fan 50, preferably in both directions towards and away from a front of the grille 100.
  • the upper part 113 comprises a plurality of horizontal hooks 120 hooking behind a top edge 121 of the lower part 114, whereby the upper part 113 cannot be pulled forward and be separated from the lower part 114.
  • the lower part 114 comprises a plurality of protrusions 122 forming a support for a lower edge 123 of the upper part 113 and preventing pushing of the upper part 113 toward the fan 50 away from the lower part 114.
  • the combination of the hooks 120 and the top edge 121 as well as the combination of the protrusions 122 and the lower edge 123 may respectively be considered as the engagement members 115 and engaging members 116.
  • fixation members 117 and the fixing members 118 rather serve for connecting the parts 113 and 114 in a vertical direction preventing separation of the parts 113 and 114 from each other.
  • the fixation member 117 is configured as a shoulder 124 protruding from an inner surface of the hub portion 109 toward the fan 50, particularly the fan hub 54.
  • the fixing member 118 is configured as a clip 125.
  • the horizontal ribs 104 pass over to hub portion 109.
  • the hub portion 109 protrudes towards the fan hub 54 and has a substantially closed surface 112 at a side facing the fan 50.
  • a certain material thickness of the grille 100 is achieved in the hub portion 109.
  • a plurality of the protrusions 122 and a plurality of the hooks 121 are provided in the hub portion 109. Additionally, also a clip 125 is provided in the hub portion.
  • the grille 100 comprises a closed surface 112 in the machine chamber portion 111. Accordingly also this portion is used to arrange engagement members 115 and engaging members 116 as well as fixation members 117 and fixing members 118. In particular, two clips 125 and a plurality of protrusions 122 and hooks 120 are provided in the machine chamber portion 111.
  • those portions of the grille providing for a sufficient rigidity are provided with the engagement members 115 / engaging members 116 as well as fixation members 117 / fixing members 118.
  • Connecting the parts 113 and 114 guarantees the visual alignment of the parts 113 and 114 and enhances the stability of the grille 100.
  • a force is applied when pressing the finger into the openings 102.
  • the grille 100 needs to withstand at least those forces.
  • the use of the hub portion 109 for this purpose has significant advantages as it is located in the center of the fan portion 110.
  • the lower part 114 and the upper part 113 comprise attachment preparations.
  • the lower part 114 and the upper part 113 each comprise a hanger 126 for example mounted to an inner surface of the grille 100 by the means of screws 127.
  • fingers 128 may be attached to the inner surface of the grille 100.
  • the hangers 126 are placed on respective counterparts on the front side of the casing 11 with the lower part 114 being slighted tilted forward so that the lower part 114 is supported in a vertical direction by the hangers on the counterparts on the casing. Subsequently, the lower part 114 is tilted towards the casing 11, whereby the fingers 128 are inserted in respective catching holes on the casing 11 for fixing the lower part 114 to the casing 11.
  • the lower edge 123 of the upper part 113 is placed or engaged with the respective protrusions 122 and the hooks 120 are hooked onto the top edge 121 of the lower part 114 with the upper part 113 being slightly tilted forward.
  • the hangers 126 of the upper part 113 are supported on the respective counterparts on the front side of the casing 11 with the upper part 113 being slightly tilted forward.
  • the upper part 113 is tilted towards the casing 11 and the fingers 128 are inserted into respective catching holes on the casing 11 for fixing the upper part 113 to the casing 11.
  • the clips 125 catch behind or over the upper surface of the respective shoulders 124, thus fixing the lower part 114 and the upper part 113 together in a vertical direction.
  • the outer surface 101 of the grille 100 provides the impression of a single part grille 100.
  • a sufficiently strong grille 100 to satisfy the requirements of the finger safety test mentioned above is realized.
  • the grille 100 extends over the entire front side of the casing and therefore resembles or represents a front panel of the outdoor unit 10.
  • the outdoor unit 10 needs to be configured to allow access to the machine chamber 21.
  • it may be cumbersome to each and every time detach the entire grille 100.
  • at least the back plate 16 (in the present example the back plate 16 and the side plate 15) is detachable so as to give access to the machine chamber 21.
  • the present description of an embodiment is not considered to be limiting. Rather several modifications may be realized by the skilled person.
  • more than the two areas A1 and A2 may be defined.
  • the two areas do not necessarily have to be arranged side-by-side and be separated by a straight line. Rather, the areas can also be separated by non-straight lines or be defined by concentric circles.
  • the outer surface 101 of the grille 100 is curved in only one direction, namely the horizontal direction. It may be curved in a different direction such as the vertical direction and it may be curved in more than one direction such as in the horizontal and the vertical direction.
  • the present description has been made in view of the standard EN 60335-1:2012 for finger safety.
  • different standards may apply so that the thresholds given above may differ from country to country.
  • the present disclosure is to be understood in that the thresholds are distinguished between a first group and a second group of humans as indicated above and not necessarily limited to the groups as defined above and given in EN 60335-1:2012.
  • the grille 100 may as well be separated into more than two parts. Also, the grille may be separated along different lines such as into a left part and a right part with a line of separation being substantially vertically.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Other Air-Conditioning Systems (AREA)

Claims (9)

  1. Außeneinheit (10) für eine Wärmepumpe mit einem Kältemittelkreislauf, wobei die Außeneinheit (10) umfasst:
    ein Gehäuse (11), das eine Vorderseite umfasst,
    einen Lüfter (50), der in dem Gehäuse aufgenommen ist, wobei der Lüfter (50) Lüfterflügel (55) aufweist, die um eine Drehachse (56) drehbar sind,
    ein Gitter (100), das an der Vorderseite angeordnet ist und die Lüfterflügel (55) bedeckt, wobei das Gitter (100) eine Vielzahl von Öffnungen (102) umfasst, die Luft durch das Gitter strömen lassen, wobei
    das Gitter mindestens zwei separate Teile (113, 114) umfasst, wobei jeder der Teile mindestens eine der Öffnungen (102) umfasst,
    wobei das Gitter (100) einen Nabenabschnitt (109) umfasst, wobei der Nabenabschnitt (109) in einer Ansicht senkrecht zu der Vorderseite in einem Bereich angeordnet ist, der einer Lüfternabe (54) entspricht,
    dadurch gekennzeichnet, dass
    ein Hauptanteil des Nabenabschnitts (109) eine geschlossene Oberfläche umfasst und dass jeder der Teile (113, 114) einen Teil des Nabenabschnitts (109) umfasst.
  2. Außeneinheit nach Anspruch 1, wobei das Gitter horizontal in die zwei Teile getrennt ist, die einen oberen Teil (113) und einen unteren Teil (114) umfassen.
  3. Außeneinheit nach einem der vorstehenden Ansprüche, wobei das Gehäuse (11) in einer Ansicht senkrecht zu dem Gitter (100) in eine Maschinenkammer (21) und einen Wärmeaustauschbereich (22) getrennt ist, wobei der Wärmeaustauschbereich den Lüfter (50) umfasst und die Maschinenkammer (21) Komponenten des Kältemittelkreislaufs der Wärmepumpe umfasst, wobei das Gitter (100) einen Lüfterabschnitt (110), der die Vielzahl von Öffnungen (102) umfasst, und einen Maschinenkammerabschnitt (111) mit einer geschlossenen Oberfläche (112) aufweist, wobei der Maschinenkammerabschnitt (111) dem Abschnitt der Maschinenkammer (21) entspricht, wobei jeder der Teile einen Teil des Maschinenkammerabschnitts (111) umfasst.
  4. Außeneinheit nach einem der vorstehenden Ansprüche, wobei einer der Teile in dem Teil des Nabenabschnitts (109) und/oder in dem Teil des Maschinenkammerabschnitts (111) ein Eingriffselement (115) aufweist und der andere der Teile in dem Teil des Nabenabschnitts (109) und/oder in dem Teil des Maschinenkammerabschnitts (111) ein eingreifendes Element (116) aufweist, das mit dem Eingriffselement (115) in Eingriff gelangt.
  5. Außeneinheit nach Anspruch 4, wobei das/die Eingriffselement/e (115) und das/die eingreifende(n) Element/e (116) in Eingriff sind und mindestens eine formschlüssige Befestigung der zwei Teile (113, 114) in einer Richtung senkrecht zu der Vorderseite des Gehäuses bilden.
  6. Außeneinheit nach einem der vorstehenden Ansprüche, wobei einer der Teile, in dem Teil des Nabenabschnitts (109) und/oder in dem Teil des Maschinenkammerabschnitts (111), ein Befestigungselement (117) aufweist und der andere der Teile in dem Teil des Nabenabschnitts (109) und/oder in dem Teil des Maschinenkammerabschnitts (111), ein befestigendes Element (118) aufweist, das mit dem Befestigungselement (117) in Eingriff ist, um die zwei Teile (113, 114) aneinander zu befestigen.
  7. Außeneinheit nach einem der vorstehenden Ansprüche, wobei sich das Gitter (100) von einer Seite des Gehäuses (13) zu einer anderen, gegenüberliegenden Seite des Gehäuses (11), insbesondere in einer horizontalen Richtung, erstreckt.
  8. Außeneinheit nach einem der vorstehenden Ansprüche, wobei die zwei Teile (113, 114) unabhängig an dem Gehäuse (11) befestigt sind.
  9. Außeneinheit nach einem der vorstehenden Ansprüche, wobei die zwei Teile (113, 114) unabhängig von dem Gehäuse (11) aneinander befestigt sind.
EP19161584.8A 2019-03-08 2019-03-08 Ausseneinheit für eine wärmepumpe umfassend ein mehrteiliges schutzgitter Active EP3705731B1 (de)

Priority Applications (2)

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EP19161584.8A EP3705731B1 (de) 2019-03-08 2019-03-08 Ausseneinheit für eine wärmepumpe umfassend ein mehrteiliges schutzgitter
PCT/JP2020/009890 WO2020184493A1 (en) 2019-03-08 2020-03-06 Outdoor unit for a heat pump having a grille comprising separate parts

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EP19161584.8A EP3705731B1 (de) 2019-03-08 2019-03-08 Ausseneinheit für eine wärmepumpe umfassend ein mehrteiliges schutzgitter

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EP3705731B1 true EP3705731B1 (de) 2022-04-20

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DE102022204585A1 (de) * 2022-05-11 2023-11-16 Robert Bosch Gesellschaft mit beschränkter Haftung Vorrichtung zum Kühlen und/oder Erwärmen eines Mediums und Abdeckung

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Publication number Priority date Publication date Assignee Title
DE2035087B2 (de) * 1970-07-15 1980-11-27 A. Upmann Ohg Kamintuerenfabrik, 4830 Guetersloh Luftungsgitter
JP3099719B2 (ja) * 1996-02-26 2000-10-16 ダイキン工業株式会社 壁掛け式空気調和装置
ITBO20040075U1 (it) * 2004-09-14 2004-12-14 Eur Ex S R L Griglia di aerazione di tipo modulare e componibile, con accoppiamenti non visibili dal fronte anteriore
JP5018069B2 (ja) * 2006-12-20 2012-09-05 ダイキン工業株式会社 空気調和機の室外ユニット
JP5899489B2 (ja) * 2011-07-19 2016-04-06 パナソニックＩｐマネジメント株式会社 ファンガード、及び、空気調和装置
JP6430024B2 (ja) 2015-09-08 2018-11-28 三菱電機株式会社 プロペラファン、プロペラファン装置および空気調和装置用室外機
DE102016218233A1 (de) * 2016-09-22 2018-03-22 Vaillant Gmbh Außeneinheit für eine Luft-Wasser-Wärmepumpe

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