EP2314880B1 - Sirocco fan and air conditioner using the same - Google Patents

Sirocco fan and air conditioner using the same Download PDF

Info

Publication number
EP2314880B1
EP2314880B1 EP08791016A EP08791016A EP2314880B1 EP 2314880 B1 EP2314880 B1 EP 2314880B1 EP 08791016 A EP08791016 A EP 08791016A EP 08791016 A EP08791016 A EP 08791016A EP 2314880 B1 EP2314880 B1 EP 2314880B1
Authority
EP
European Patent Office
Prior art keywords
point
fan
air
scroll casing
bell mouth
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
EP08791016A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2314880A4 (en
EP2314880A1 (en
Inventor
Hiroki Okazawa
Hiroshi Tsutsumi
Takahiro Yamatani
Kazunobu Nishimiya
Yukihiko Kawanori
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41506762&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2314880(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2314880A1 publication Critical patent/EP2314880A1/en
Publication of EP2314880A4 publication Critical patent/EP2314880A4/en
Application granted granted Critical
Publication of EP2314880B1 publication Critical patent/EP2314880B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Definitions

  • the present invention relates to a method of designing a sirocco fan, a sirocco fan and an air-conditioning apparatus using the same, and more specifically to a sirocco fan (and a method for designing this fan) that is configured to reduce a generated noise and an air-conditioning apparatus using the same.
  • a blower in EP 1 703 138 A2 , includes a multiblade fan (3) and a scroll casing (4) accommodating the multiblade fan (3) therein.
  • the scroll casing (4) has two side walls (13) opposed to each other, a curved peripheral wall (12a, 12b), and a tongue (9) continuous with the curved peripheral wall (12a, 12b).
  • the scroll casing (4) also has an intake opening defined in one of the two opposed side walls (13) and a discharge opening (8) delimited by the two side walls (13), the curved peripheral wall (12a, 12b), and the tongue (9).
  • the curved peripheral wall (12a, 12b) has a first peripheral wall (12a) continuous with the tongue (9) and a second peripheral wall (12b) formed on a downstream side of the first peripheral wall (12a) with respect to the direction of travel of air so as to be continuous with the first peripheral wall (12a).;
  • the first peripheral wall (12a) is concentric with the multiblade fan (3) and has a constant radius of curvature, while the second peripheral wall (12b) has an expansion angle such that a distance (L) between a center (11) of the multiblade fan (3) and the second peripheral wall (12b) increases towards the discharge opening (8).
  • JP 9 126 193 discloses: Counterflowing air blowing back from blades 7 to a suction port 14 of a scroll casing 4 is blown out from the upper surfaces of the blades 7, and substantially no air is sucked in this part under a normal blowing condition.
  • the upper surfaces of the blades 7 in a zone A ranging from an angle of -60deg. to an angle of +60deg. in the rotating direction of a centrifugal impeller about a nose part 18 as an original point, in which counterflow likely occurs, are covered with a wide part 24 of a bell-mouth 15, an opening edge part 26 or the like.
  • the upper surfaces of the blades 7 in a zone B ranging from an angle of +120deg.
  • a sirocco fan having a cylindrical shape, and serving as a multi-blade centrifugal fan capable of blowing out an airstream in a width-wide belt like manner toward an objective area to be air-conditioned exists.
  • This sirocco fan is often utilized for an indoor unit constituting an air-conditioning apparatus, a dehumidifier, an air cleaner, and so forth.
  • Such a sirocco fan is generally constructed by housing a fan in which a plurality of thin long blades are arranged on a circumference and formed to have a cylindrical shape as a whole in a scroll casing where a suction inlet and a blowing-outlet are formed. Further, the sirocco fan is configured to suck in air through the suction inlet into the inside thereof and to blow out the air sucked in from a blowing-outlet side to the area to be air-conditioned.
  • a multi-blade fan provided with a plurality of multi-blade centrifugal fan units that are coupled along the same rotation axis at a space between each other, and a casing in which the aforementioned coupled plurality of multi-blade centrifugal fan units are housed, wherein the casing forms a flow path for use in a blowing-out operation for blowing out the air that is blown out from the aforementioned plurality of multi-blade centrifugal fan units toward the outside, and which the aforementioned flow path for use in a blowing-out operation serves as a common flow path connecting to the aforementioned plurality of multi-blade centrifugal fan units" is proposed (for example, refer to Patent Document 1).
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 11-324984 (Page 5, Figs. 7 and 8 )
  • the present invention is made to solve the aforementioned problems, and an object is to provide a sirocco fan in which a sound generated at a time when a predetermined amount of the blowing-out air volume is supplied is reduced, and an air-conditioning apparatus using the same.
  • a sirocco fan designed in accordance with the present invention is characterized in including: a scroll casing including a suction inlet for sucking in air, a blowing-outlet for blowing out the air, and an air path from the suction inlet to the blowing-outlet; a fan housed in the scroll casing, for sucking in the air from the suction inlet and blowing out the air from the blowing-outlet by means of rotation-driving; and a bell mouth attached to the suction inlet of the scroll casing, in which the suction inlet is formed on an extension line of a rotation axis of the fan and on both side surfaces of the scroll casing, in which when a ventilation resistance in the air path is defined as P[Pa], an amount of air sucked in from the suction inlet is defined as Q[m 3 /min], a width in a direction of a rotation axis of the fan is defined as L[mm], k is defined as a constant, a height of the scroll casing is defined as
  • a sirocco fan designed in accordance with the present invention is characterized in including: a scroll casing including a suction inlet for sucking in air, a blowing-outlet for blowing out the air, and an air path from the suction inlet to the blowing-outlet; a fan housed in the scroll casing, for sucking in the air from the suction inlet and blowing out the air from the blowing-outlet by means of rotation-driving; and a bell mouth attached to the suction inlet of the scroll casing, in which the suction inlet is formed on an extension line of a rotation axis of the fan and on one side surface of the scroll casing, in which when a ventilation resistance in the air path is defined as P[Pa], an amount of air sucked in from the suction inlet is defined as Q[m 3 /min], a width in a direction of a rotation axis of the fan is defined as L[mm], k is defined as a constant, a height of the scroll casing is defined as
  • an air-conditioning apparatus in accordance with the present invention is characterized in using the sirocco fan being designed as described above.
  • a balance of a blowing out air volume of the air and a noise can be achieved by means of only determining a fan width on the basis of a predetermined formula so that an operating point of the fan is within a predetermined range, a sound generated at a time of supplying a predetermined amount of the blowing out air volume can effectively be reduced.
  • Fig. 1 is a see-through perspective view illustrating an inside of a sirocco fan 100 in a see-through manner with respect to a first embodiment of the present invention.
  • Fig. 2 is a perspective view illustrating an entire shape of a fan 1.
  • Fig. 3 is a cross-sectional view illustrating a schematic longitudinal cross-sectional construction of the sirocco fan 100. An entire construction of the sirocco fan 100 will be explained on the basis of Fig. 1 through Fig. 3 .
  • This sirocco fan 100 is the one that is utilized for an indoor unit constituting an air-conditioning apparatus, such as an air-conditioner, a dehumidifier, or the like, and the dehumidifier, an air cleaner, and so forth.
  • an air-conditioning apparatus such as an air-conditioner, a dehumidifier, or the like
  • the dehumidifier an air cleaner
  • the sirocco fan 100 is composed of a fan 1, in which a plurality of thin long blades are arranged on a circumference, and which is formed to have a cylindrical shape as a whole, a scroll casing 2 housing the fan 1, in which an air path is formed in an inside thereof, and a bell mouth 3 attached on an extension line of a rotation center (hereinbelow called as a rotation axis, simply) of the fan 1 and to both side surfaces of the scroll casing 2.
  • the fan 1 is provided with a rotation center, and is configured to suck in air and to blow out the air by means of a rotation.
  • the scroll casing 2 is composed of a suction inlet 2a formed to have an opening on a rotation axis, a blowing-outlet 2b that blows out the air that is sucked in from the suction inlet 2a to an objective area, and an air path 2c that is formed to have a scroll casing shape (curved shape) in a rotating circumferential direction of the fan 1, and that allows the suction inlet 2a and the blowing-outlet 2b to communicate with each other.
  • a suction inlet 2a formed to have an opening on a rotation axis
  • a blowing-outlet 2b that blows out the air that is sucked in from the suction inlet 2a to an objective area
  • an air path 2c that is formed to have a scroll casing shape (curved shape) in a rotating circumferential direction of the fan 1, and that allows the suction inlet 2a and the blowing-outlet 2b to communicate with each other.
  • the bell mouth 3 is formed to have an opening and is configured to be attached to the suction inlet 2a of the scroll casing 2, and enables the air sucked in from the suction inlet 2a to be intensively accelerated and thereby to be supplied to the fan 1.
  • the scroll casing 2 is constructed such that a height H of the scroll casing is formed to be 246mmm. Incidentally, this does not specifically limit a shape of the bell mouth 3, and for example, the shape may be determined corresponding to a length of the fan diameter D.
  • Fig. 4 is a graph illustrating a P-Q characteristic and a Ks-Q characteristic of the sirocco fan 100.
  • the P-Q characteristic and the Ks-Q characteristic of the sirocco fan 100 will be explained on the bases of Fig. 4 .
  • P static pressure [Pa]
  • Q represents an air volume [m 3 /min]
  • Ks represents a specific noise [dB], respectively.
  • the SPL represents a noise value, and a value, in which a noise generated by the sirocco fan 100 is measured at a position, spaced apart by about one meter along a rotation axis of the sirocco fan 1, from a center of the bell mouth attached to the suction inlet 2a of the scroll casing 2, is used for the noise value.
  • closed circles in Fig. 4 denote the P-Q characteristic
  • open circles denote the Ks-Q characteristic, respectively.
  • bracketed numbers (1) through (3) represent the operating points, respectively.
  • the P-Q characteristic represents a relationship between the static pressure P (indicated by a scale of a left-side ordinate axis) as a ventilation resistance and the air volume Q (indicated by a scale of a abscissa axis) under a state that a rotation number of the fan 1 is constant.
  • the closed circles in Fig. 4 the smaller, the static pressure is, the easier, the air in the air path 2c becomes to flow, and the larger, the static pressure is, the harder, the air in the air path 2c becomes to flow. That is, at the operating point (3), the air volume becomes to be easily obtained, and at the operating point (1), the air volume becomes to be hardly obtained.
  • a high static pressure and low air volume side is called as a closure side (upper left side in the graph), and a low static pressure and high air volume side is called as an open side (lower right side in the graph).
  • the specific noise Ks (indicated by a scale of a right-side ordinate axis) is configured to increase at the time when the air volume Q increases as denoted by the open circles in Fig. 4 .
  • This specific noise Ks is a noise value obtained under consideration for the static pressure P and the air volume Q.
  • Fig. 5 is a graph illustrating a relationship between a ratio L 0 /H 0 of the sirocco fan 100 and the loss coefficient ⁇ 0 .
  • the relationship between the ratio Lo/Ho of the sirocco fan 100 and the loss coefficient ⁇ 0 will be explained on the basis of Fig. 5.
  • an ordinate axis represents the ratio L 0 /H 0
  • an obscissa axis represents the loss coefficient ⁇ 0 respectively.
  • the loss coefficient is a value obtained by a position of an operating point (P, Q), described later.
  • the ratio L 0 /H 0 represents a ratio in a case that the scroll-casing height H 0 is fixed, and the width dimension L 0 is varied.
  • Fig. 6 is a graph illustrating a P-Q characteristic and a Ks-Q characteristic of the sirocco fan 100, in a case that the same passes an operating point A, while the width dimension L 0 is set to be 230 or 300mm. Further, closed circles denote the P-Q characteristic at the time when the width dimension L 0 is set to be 230mm, and open circles denote the P-Q characteristic at the time when the width dimension L 0 is set to be 300mm, respectively.
  • closed triangles denote the Ks-Q characteristic at the time when the width dimension L 0 is set to be 230mm
  • open triangles denote the Ks-Q characteristic at the time when the width dimension L 0 is set to be 300mm, respectively.
  • the operating point explained here is determined in accordance with a designed air volume of a fan unit, and a designed static pressure (a ventilation resistance of a heat exchanger, an air path of the fan unit, a ventilation resistance of the air path of a duct, a ventilation resistance due to a filter or the like).
  • the width dimensions L 0 is set to be 230mm and 300mm
  • the P-Q characteristics that pass the operating point A are compared, it is found that the P-Q characteristic of the case of the long width dimension L 0 of 300mm, whose surging area moves toward a lower right (open side) of the graph of the P-Q characteristic is closer to the operating point A than the other. It is found from the P-Q characteristic and the Ks-Q characteristic illustrated in Fig. 6 that the operating point where the specific noise Ks becomes minimum is in the vicinity of the surging area.
  • the operating point when the operating point is within the surging area or in the vicinity of the surging area, the flow of air becomes unstable, and this results in occurrence of reverse suction or an abnormal sound, and increase of time fluctuation of the air volume. Consequently, in order to form a stable flow of air assuredly, the operating point is required to be closer to the open side in relation to the surging area.
  • a surging area in a P-Q characteristic diagram moves toward a lower right side.
  • the more the operating point is spaced apart from the surging area to an open side i.e., lower right side in the P-Q characteristic diagram
  • the reason of the cause thereof is because a static pressure fluctuation is increased at a tongue portion (denoted by a reference numeral 2b1 in Fig. 3 ) of a casing, or in the area where a distance between a bell mouth and a fan is small.
  • occurrence of a noise is configured to be reduced by means of causing the operating point to approach the surging area as much as possible, by increasing the capacity of the fan in relation to the predetermined operating point, and moving the surging area.
  • a fan unit which is capable of constructing a fan width to be larger than the hitherto known ones without unnecessarily increasing a height of the fan unit, has a less installation restriction to optimize a relationship between an operating point and a surging area, and can reduces a noise, can be obtained.
  • Fig. 7 is a graph illustrating a relationship between an air volume between blades per each blade of the fan 1 and a position of the blade.
  • a relationship between an air volume between blades per each blade of the fan 1 constituting the sirocco fan 100 and a position of the blade will be explained.
  • a ordinate axis represents the air volume (m 3 /min) between blades per each blade
  • a abscissa axis represents the position of the blade, respectively.
  • closed circles denote a relationship between an air volume between blades per each blade and a position of the blade at an operating point (1)
  • open rhombuses denote a relationship between an air volume between blades per each blade and a position of the blade at an operating point (2)
  • closed triangles denote a relationship between an air volume between blades per each blade and a position of the blade at an operating point (3), respectively.
  • Fig. 7 the air volume between blades per each blade of the fan 1 represented by the ordinate axis is illustrated such that a case of an air flow that is directed from an inner peripheral side of the blade to an outer peripheral side thereof is defined as positive, and a case of the air flow that is directed from the outer peripheral side of the blade to the inner peripheral side thereof is defined as negative.
  • a position of the blade indicated by a abscissa axis is represented by an hour hand of a clock. That is, the position of the blade is expressed by replacing the same with a position of the hour hand of the clock from 0 minutes past 0 o'clock to 0 minutes past 12 o'clock.
  • the operating point (1) through the operating point (3) illustrated in Fig. 7 indicate the same operating points as the operating points (1) through (3) illustrated in Fig. 4 .
  • the more the operating point is spaced apart from the surging area to the open side the more the static pressure fluctuation is increased at the tongue portion (denoted by a reference numeral 2b1 in Fig. 3 ) of a casing, or in an area where a distance between a bell mouth and a fan is small. As a result, the abnormal sound becomes easy to occur.
  • 0.1 ⁇ ⁇ 0 ⁇ 0.4 can be generalized into 0.1 ⁇ k 4 ⁇ ⁇ 0.4, and 0.75f( ⁇ 0 ) ⁇ L 0 /H 0 ⁇ f( ⁇ 0 ) can be generalized into 0.75f(k 4 ⁇ ) ⁇ L/H ⁇ f(k 4 ⁇ ).
  • the fan 1 in a case that the fan 1 is used for an air-conditioning apparatus in which a heat exchanger is provided on a downstream side of a fan, and in the case of the condition of the small loss coefficient (with a large air volume and a small ventilation resistance), since the noise is small and the velocity distribution in a width direction of the heat exchanger approaches a uniform state by means of lengthening the fan width, the compressor can be operated without unnecessarily increasing a power consumption therefor.
  • a fan unit having a small specific noise Ks in which an abnormal sound does not occur, can be formed by means of satisfying the inequality: 1.5g(k 4 ⁇ ) ⁇ L/H ⁇ 2g(k 4 ⁇ ) within the range of 0.1 ⁇ k 4 ⁇ ⁇ 0.4.
  • a stable air flow with small specific noise can be formed by means of satisfying the equation: 0.75f(k 4 ⁇ ) ⁇ L/H ⁇ f(k 4 ⁇ ), within the range of 0.1 ⁇ k 4 ⁇ ⁇ 0.4.
  • a stable air flow with small specific noise can be formed by means of satisfying the equation: 1.5g(k 4 ⁇ ) ⁇ L/H ⁇ 2g(k 4 ⁇ ), within the range of 0.1 ⁇ k 4 ⁇ ⁇ 0.4.
  • Fig. 8 is a schematic cross-sectional view illustrating a longitudinal cross-sectional construction of the bell mouth 3.
  • Fig. 9 is a perspective view of the sirocco fan 100 illustrating an area ⁇ of the bell mouth 3.
  • Fig. 10 is an enlarged view of a part of the area ⁇ illustrating an rms value of a static pressure fluctuation on a wall surface of the part of the area ⁇ when a step is not provided.
  • Fig. 11 is the enlarged view of the part of the area ⁇ illustrating the rms value of the static pressure fluctuation on the wall surface of the part of the area ⁇ when the step is provided.
  • end points on a sirocco fan 100 side are defined as a point A and a point A' (point symmetric to the point A about a center of the bell mouth 3), respectively
  • end points on the other side are defined as a point B and a point B' (point symmetric to the point B about a center of the bell mouth 3)
  • an intersecting point of a straight line that is drawn from the point B in a direction of the fan 1 and a side surface of a scroll casing 2 is defined as a point C
  • an intersecting point of a straight line that is drawn from the point B' in the direction of the fan 1 and the side surface of the scroll casing side 2 is defined as a point C'
  • an intersecting point of a line segment AA' and an extension line of the rotation axis of the fan 1 is defined as a point
  • Fig. 12 is a longitudinal cross-sectional view illustrating a schematic cross-sectional construction of the sirocco fan 100.
  • Fig. 13 is a see-through perspective view illustrating the sirocco fan 100 in the see-through manner.
  • an area in the sirocco fan 100 where the rms value of the static pressure fluctuation is large will be explained.
  • a portion that is located closest to an outer peripheral portion of the fan 1 at a curved portion of the scroll casing 2 constituting the sirocco fan 100 extending from the air path 2c to the blowing-outlet 2b is illustrated as a tongue portion 4.
  • Fig. 13 illustrates that on an intersection line of a plane surface that passes through the point A, the point O, and the point A' shown in Fig. 8 and the tongue portion 4, a point having the smallest distance from the fan 1 is defined as a point D, a point on the bell mouth 3, which is closest to the point D is defined as a point E, a point that is positioned at an angle of 65 degrees relative to the point E in a counter rotation direction of the fan 1 about the point O as a center is defined as a point F, a point that is positioned at an angle of 40 degrees relative to the point F in a counter rotation direction of the fan 1 about the point O as a center is defined as a point G, a point that is positioned at an angle of 40 degrees relative to the point F in a rotation direction of the fan 1 about the point O as a center is defined as a point H, and a point that is positioned at an angle of 180 degrees relative to the point F in a rotation direction of the fan 1 about the point O as a center is
  • the area in the sirocco fan 100 having a large rms value of the static pressure fluctuation is an area of an approximately circular arc HFG connecting the point H, the point F, and the point G.
  • a length of a line segment BC in the circular arc HFG is defined as X
  • a length of the line segment BC in an approximately circular arc HIG (a circular arc connecting the point H, the point I, and the point G)
  • Y a length of the line segment BC in an approximately circular arc HIG (a circular arc connecting the point H, the point I, and the point G)
  • the bell mouth 3 that is configured to satisfy an inequality X > Y ⁇ 0 within a range of L/H ⁇ f(k 4 ⁇ ) or L/H ⁇ g(k 4 ⁇ ) is employed, the rms value of the static pressure fluctuation can be reduced and the noise can also be reduced.
  • the rms value of the static pressure fluctuation in the area of the circular ark HFG is 7Pa at the maximum, however, in a case that the step is formed on the side surface of the scroll casing 2, the rms value of the static pressure fluctuation in the area of the circular arc HFG is 1Pa or less at the maximum. That is, the noise caused by the bell mouth 3 as a sound source is reduced by means of forming the step on the side surface of the scroll casing 2.
  • the reason is considered such that a distance from the fan 1 is enlarged by an amount of the step formed, namely by an amount of the length of the line segment BC, and thereby the static pressure fluctuation that occurs by the rotation of the fan 1 is suppressed.
  • Fig. 14 is a graph illustrating a P-Q characteristic of the sirocco fan 100 in a case of passing the operating point B.
  • the P-Q characteristic in a case of passing the operating point B of the sirocco fan 100 in which the step is formed on the side surface of the scroll casing 2 and the P-Q characteristic in a case of passing the operating point B of the sirocco fan 100 in which the step is not formed on the side surface of the scroll casing 2 will be explained.
  • Fig. 14 the P-Q characteristic in a case of passing the operating point B of the sirocco fan 100 in which the step is formed on the side surface of the scroll casing 2
  • a ordinate axis indicates static pressure P[Pa]
  • the abscissa axis indicates an air volume Q[m 3 /min].
  • the surging areas are compared in the sirocco fan 100 with the step formed on the side surface of the scroll casing 2, and the sirocco fan 100 with no step formed on the side surface of the scroll casing 2, it is found that the surging area in the former is on the open side in relation to that in the latter.
  • the sirocco fan 100 with the step formed on the side surface of the scroll casing 2 is mounted on a fan unit of an air-conditioning apparatus, a dehumidifier, an air cleaner or the like, there is sometimes a case in which the width dimension of the sirocco fan 100 cannot be lengthened due to a dimensional restriction of the fan unit. That is, in a case that the width dimension is short, and the operating point is located on the open side in relation to the surging area where the specific noise becomes minimum, since the surging area can be caused to approach the operating point, it is effective for reducing the noise.
  • Fig. 15 is a plan view illustrating a schematic entire construction of a ceiling suspended indoor unit 110 on which the sirocco fan 100 is mounted.
  • Fig. 16 is a cross-sectional view illustrating a longitudinal cross-sectional construction of the ceiling suspended indoor unit 110.
  • a static pressure fluctuation of a case that the sirocco fan 100 with the step formed on the side surface of the scroll casing 2 is mounted on the ceiling suspended indoor unit 110 will be explained.
  • Fig. 15 a case that two sirocco fans 100 are mounted and suction spaces 5 are formed on the respective side surfaces in the width direction is illustrated.
  • an air flow is indicated by arrows.
  • the sirocco fan 100 with the step formed in the area of the circular arc HFG is mounted on the ceiling suspended indoor unit 110, the step can be positioned on the downstream side of the suction inlet 2a, and a decrease of the suction space 5 can be reduced.
  • Fig. 17 is a table showing a noise value in the ceiling suspended indoor unit 110.
  • a noise value of the noise generated from the ceiling suspended indoor unit 110 on which the sirocco fan 100 with the step formed on the side surface of the scroll casing 2 is mounted and the noise value of the noise generated from the ceiling suspended indoor unit 110 on which the sirocco fan 100 with no step formed on the side surface of the scroll casing 2 is mounted, will be explained.
  • the step is assumed to be formed in an area of the circular arc HFG. Further, the noise values in a case that the blowing-out air volume is set to be 16m 3 /min are respectively shown.
  • the noise value of the sirocco fan with the step formed in the area of the circular arc HFG is 42.4[dB]
  • the noise value of the sirocco fan with no step formed in the area of the circular arc HFG is 44.0[dB].
  • the noise value can be reduced by means of forming the step in the area of the circular ark HFG.
  • a decrease of the suction space 5 can be suppressed and the noise value can be reduced by means of forming a step in the area of the circular arc HFG.
  • Fig. 18 is a schematic constructional view illustrating a schematic construction of an air-conditioning apparatus 150 with respect to a second embodiment of the present invention.
  • a construction of the air-conditioning apparatus 150 will be explained on the basis of Fig. 18 .
  • This air-conditioning apparatus 150 is the one where the sirocco fan 100 with respect to the first embodiment is mounted.
  • This sirocco fan 100 is to be used for an indoor unit constituting the air-conditioning apparatus 150 while being mounted in the vicinity of a heat exchanger.
  • this second embodiment a different point from the above-described first embodiment will be mainly explained, and the same numerals are attached to the same parts as that in the first embodiment, and the explanation will be omitted.
  • This air-conditioning apparatus 150 is constructed while connecting a compressor 151, a condensing heat exchanger 152, a throttling apparatus 153, and the evaporating heat exchanger 154 in series with refrigerant piping.
  • the sirocco fan 100 with respect to the first embodiment is provided in the indoor unit where the condensing heat exchanger 152 or the evaporating heat exchanger 154 is installed. That is, the sirocco fan 100 is provided in the vicinity of the condensing heat exchanger 152 or the evaporating heat exchanger 154 that is installed in the indoor unit, and is provided with a function to supply air to the condensing heat exchanger 152 or the evaporating heat exchanger 154.
  • the compressor 151 is an apparatus to suck in refrigerant flowing in the refrigerant piping, and to compress the refrigerant so that the refrigerant is brought to a high temperature and high pressure state.
  • the condensing heat exchanger 152 is an apparatus to perform a heat-exchange operation between the air and the refrigerant, and to condense and liquefy the refrigerant.
  • the throttling apparatus 153 is an apparatus to decompress and expand the refrigerant.
  • the evaporating heat exchanger 154 is an apparatus to perform the heat exchange operation between the air and the refrigerant, and to evaporate and gasify the refrigerant.
  • the noise transmitted to a house interior can be reduced by means of mounting the sirocco fan 100 with respect to the first embodiment on the indoor unit provided with the condensing heat exchanger 152 or the evaporating heat exchanger 154, that constitutes the air-conditioning apparatus 150.
  • An arrow illustrated in Fig. 18 indicates a flowing direction of the refrigerant.
  • the refrigerant gas that is compressed and brought to a high temperature and high pressure state by means of the compressor 151 flows into the condensing heat exchanger 152.
  • the condensing heat exchanger 152 the refrigerant is condensed by being heat-exchanged with the air, and is brought to a liquid refrigerant or a gas-liquid two-phase refrigerant of low temperature and high pressure.
  • the refrigerant that flows out from the condensing heat exchanger 152 is thereafter decompressed by means of the throttling apparatus 153, and flows into the evaporating heat exchanger 154 upon becoming the liquid refrigerant of low temperature and low pressure, or the gas-liquid two-phase refrigerant.
  • the refrigerant is evaporated by being heat-exchanged with the air, is brought to a refrigerant gas of high temperature and low pressure, and is again sucked into the compressor 151.
  • the condensing heat exchanger 152 is mounted on the indoor unit
  • the evaporating heat exchanger 154 is mounted on the indoor unit.
  • a noise value of the air-conditioning apparatus at a predetermined operating point can be reduced and a velocity distribution of the heat exchanger in a width direction can be caused to approach a uniform state, by means of replacing the fan with a fan having a long fan width, even when the number of the fans is decreased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08791016A 2008-07-10 2008-07-10 Sirocco fan and air conditioner using the same Active EP2314880B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/062442 WO2010004628A1 (ja) 2008-07-10 2008-07-10 シロッコファン及びそれを用いた空気調和装置

Publications (3)

Publication Number Publication Date
EP2314880A1 EP2314880A1 (en) 2011-04-27
EP2314880A4 EP2314880A4 (en) 2011-08-10
EP2314880B1 true EP2314880B1 (en) 2013-01-09

Family

ID=41506762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08791016A Active EP2314880B1 (en) 2008-07-10 2008-07-10 Sirocco fan and air conditioner using the same

Country Status (8)

Country Link
EP (1) EP2314880B1 (ja)
JP (1) JP4660634B2 (ja)
KR (1) KR101045750B1 (ja)
CN (1) CN102066771B (ja)
AU (1) AU2008359151B2 (ja)
ES (1) ES2402790T3 (ja)
TW (1) TW201002944A (ja)
WO (1) WO2010004628A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10302096B2 (en) 2015-02-16 2019-05-28 Samsung Electronics Co., Ltd. Scroll for air conditioner and air conditioner having the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5717046B2 (ja) * 2010-11-12 2015-05-13 日本電産株式会社 送風ファン
CN102977856A (zh) * 2012-11-21 2013-03-20 青岛文创科技有限公司 一种丙烯酸酯抑尘剂
CN103835997B (zh) * 2014-03-06 2017-05-03 珠海格力电器股份有限公司 空调室内机及其蜗壳
EP3460254B1 (en) * 2016-05-20 2021-12-01 Mitsubishi Electric Corporation Air conditioner
WO2018225217A1 (ja) * 2017-06-08 2018-12-13 三菱電機株式会社 シロッコファンおよびそれを用いた空気調和機
CN116075672B (zh) * 2020-08-07 2024-02-02 大金工业株式会社 风机单元及包括该风机单元的空气处理系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875881A (en) * 1931-01-27 1932-09-06 American Blower Corp Fan housing construction
JPS61229999A (ja) * 1985-04-03 1986-10-14 Matsushita Refrig Co 送風装置
JPH07208396A (ja) * 1994-01-27 1995-08-08 Nippondenso Co Ltd 遠心式送風機
JPH08312592A (ja) * 1995-05-19 1996-11-26 Akaishi Kinzoku Kogyo Kk 送風機のケーシング開口部構造
JP3700217B2 (ja) * 1995-10-31 2005-09-28 株式会社デンソー 遠心式送風機
JPH09195978A (ja) * 1996-01-17 1997-07-29 Matsushita Electric Ind Co Ltd 送風機設計方法
JPH11324984A (ja) 1998-05-06 1999-11-26 Toto Ltd 多翼ファン
JP2001115997A (ja) * 1999-10-14 2001-04-27 Matsushita Seiko Co Ltd 多翼ファン
JP2004169579A (ja) * 2002-11-18 2004-06-17 Sanden Corp 遠心式送風機
JP2006233835A (ja) * 2005-02-24 2006-09-07 Matsushita Electric Ind Co Ltd 送風機
CN2937888Y (zh) * 2006-02-21 2007-08-22 松下电器产业株式会社 管道式空调器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10302096B2 (en) 2015-02-16 2019-05-28 Samsung Electronics Co., Ltd. Scroll for air conditioner and air conditioner having the same

Also Published As

Publication number Publication date
CN102066771A (zh) 2011-05-18
JPWO2010004628A1 (ja) 2011-12-22
KR101045750B1 (ko) 2011-06-30
JP4660634B2 (ja) 2011-03-30
ES2402790T3 (es) 2013-05-09
CN102066771B (zh) 2012-12-12
KR20100134684A (ko) 2010-12-23
EP2314880A4 (en) 2011-08-10
AU2008359151A1 (en) 2010-01-14
AU2008359151B2 (en) 2011-07-28
WO2010004628A1 (ja) 2010-01-14
TWI354735B (ja) 2011-12-21
TW201002944A (en) 2010-01-16
EP2314880A1 (en) 2011-04-27

Similar Documents

Publication Publication Date Title
EP2314880B1 (en) Sirocco fan and air conditioner using the same
CN107850084B (zh) 离心送风机、空气调节装置及制冷循环装置
EP2618066B1 (en) Blower for outdoor unit, outdoor unit, and refrigeration cycle device
EP3702626A1 (en) Centrifugal blower, blowing device, air conditioner, and refrigeration cycle device
US10634168B2 (en) Blower and air-conditioning apparatus including the same
EP2757269B1 (en) Scirocco fan and air-conditioning apparatus
EP2395290A1 (en) Indoor unit for air conditioner, and air conditioner
CN112703350B (zh) 空调机的室外单元
CN112119224B (zh) 离心送风机、送风装置、空调装置及制冷循环装置
CN109247023B (zh) 离心送风机、空气调节装置以及制冷循环装置
CN111247345A (zh) 离心送风机、送风装置、空气调节装置以及制冷循环装置
JP6541881B2 (ja) 空気調和機、空気調和装置および冷凍サイクル装置
WO2018092262A1 (ja) プロペラファン及び冷凍サイクル装置
JP4889716B2 (ja) 空気調和機の室内機
JP5709607B2 (ja) ファンガード、室外ユニット及び冷凍サイクル装置
JP2010236426A (ja) シロッコファン
EP4336045A1 (en) Blower, air conditioner, and refrigeration cycle device
EP4191072A1 (en) Scroll casing of centrifugal blower, centrifugal blower provided with scroll casing, air conditioner, and refrigeration circuit device
US20240117810A1 (en) Blower and indoor unit
JP2002276976A (ja) 室内機ユニット及び空気調和機
JP2002276585A (ja) 室内機ユニット及び空気調和機
WO2018042487A1 (ja) 送風機及び空気調和装置の室内機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20101223

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602008021576

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: F04D0029440000

Ipc: F04D0029420000

A4 Supplementary search report drawn up and despatched

Effective date: 20110708

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/66 20060101ALI20110704BHEP

Ipc: F04D 29/42 20060101AFI20110704BHEP

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20120403

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 592909

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130115

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602008021576

Country of ref document: DE

Effective date: 20130314

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2402790

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20130509

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130109

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 592909

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130109

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130409

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130509

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130409

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130509

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

26N No opposition filed

Effective date: 20131010

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602008021576

Country of ref document: DE

Effective date: 20131010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602008021576

Country of ref document: DE

Effective date: 20140201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130731

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140201

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130710

REG Reference to a national code

Ref country code: ES

Ref legal event code: GC2A

Effective date: 20141209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130109

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20141105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130710

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080710

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230512

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230612

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230601

Year of fee payment: 16

Ref country code: ES

Payment date: 20230801

Year of fee payment: 16