US20260063325A1 - Ventilation system - Google Patents

Ventilation system

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Publication number
US20260063325A1
US20260063325A1 US19/106,099 US202319106099A US2026063325A1 US 20260063325 A1 US20260063325 A1 US 20260063325A1 US 202319106099 A US202319106099 A US 202319106099A US 2026063325 A1 US2026063325 A1 US 2026063325A1
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US
United States
Prior art keywords
ventilation
airflow
ventilation device
nozzle
nozzle unit
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
US19/106,099
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English (en)
Inventor
Yuuji OZAKI
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co 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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of US20260063325A1 publication Critical patent/US20260063325A1/en
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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/072—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser of elongated shape, e.g. between ceiling panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit

Definitions

  • the present disclosure relates to a ventilation system.
  • Patent Literature 1 describes a ventilation device including a plurality of nozzles having the same length. Each nozzle has an inflow port and a vent. High-pressure air flows into the nozzles through the inflow ports, and the high-pressure air in the nozzles blows out through the vents. The plurality of nozzles are disposed with a gap therebetween such that the respective vents of the nozzles are on the same plane. The gap forms, outside the nozzles, a path for air drawn in streams of the high-pressure air blowing out through the vents.
  • the ventilation device includes a damper mechanism capable of changing an opening area of the inflow port of each nozzle. The ventilation device adjusts the opening area of the inflow port of each nozzle, thereby adjusting a ventilation range.
  • the nozzles each have to be provided with the damper mechanism capable of changing the opening area of the inflow port thereof to allow a ventilation direction to be changed. This results in a complex nozzle structure.
  • Patent Literature 1 JP 2018-003658 A
  • a ventilation system includes a nozzle unit, a ventilation device, and a control device.
  • the nozzle unit includes at least two nozzles each including a housing having a hollow elongated shape extending in alignment with a first direction, the at least two nozzles being arranged side by side in alignment with a second direction intersecting the first direction.
  • the ventilation device is arranged above the nozzle unit and is configured to blow air from a first end toward a second end of the nozzle unit in the first direction.
  • the control device is configured to control the ventilation device.
  • the housing of each of the at least two nozzles has a lower surface having a ventilation port extending in alignment with the first direction.
  • the ventilation port is configured to allow air sent into the housing to be blown out of the housing through the ventilation port.
  • FIG. 1 is a perspective view of a ventilation system of an embodiment
  • FIG. 2 is a perspective view of a ventilation unit included in the ventilation system
  • FIG. 3 is a sectional side view of the ventilation unit
  • FIG. 4 is a bottom view of the ventilation unit
  • FIG. 5 A is a plan view of a right end of a nozzle included in the ventilation unit
  • FIG. 5 B is a plan view of a left end of the nozzle included in the ventilation unit
  • FIG. 6 is a view of part of the ventilation unit
  • FIG. 7 is a view of straightly downward airflow of the ventilation system
  • FIG. 8 is a view of diagonal airflow of the ventilation system
  • FIG. 9 is a perspective view of a ventilation unit included in a ventilation system of a first variation.
  • FIG. 10 is a sectional side view of the ventilation unit of the first variation
  • FIG. 11 is a view of a straightly downward airflow of the ventilation system of the first variation
  • FIG. 12 is a view of first diagonal airflow of the ventilation system of the first variation.
  • FIG. 13 is a view of second diagonal airflow of the ventilation system of the first variation.
  • the present embodiment generally relates to ventilation systems. More specifically, the present disclosure relates to a ventilation system including at least two nozzles each having a hollow elongated shape, the at least two nozzles being arranged parallel to each other.
  • X, Y, and Z axes orthogonal to one another are defined as shown in FIG. 1 .
  • one of both directions aligned with the X axis is defined as a right direction, and the other is defined as a left direction.
  • one of both directions aligned with the Y axis is defined as a forward direction, and the other is defined as a backward direction.
  • one of both directions aligned with the Z axis is defined as an upward direction, and the other is defined as a downward direction.
  • FIG. 1 shows a ventilation system VS 1 of the present embodiment.
  • the ventilation system VS 1 is used in a facility such as an office building, an office, a retail establishment, a factory, or a commercial facility. Moreover, the ventilation system VS 1 may be used in, for example, a dwelling unit of a multi-family dwelling house or a detached house.
  • the ventilation system VS 1 is assumed to be installed in a building such as a facility or a dwelling house but may be installed in a structural object other than the building.
  • the ventilation system VS 1 of the present embodiment includes a nozzle unit 1 , a ventilation device 3 , and a control device 4 .
  • the nozzle unit 1 includes at least two nozzles 10 .
  • the at least two nozzles 10 each include a housing 10 a having a hollow elongated shape extending in alignment with a first direction.
  • the at least two nozzles 10 are arranged side by side in alignment with a second direction intersecting the first direction.
  • the ventilation device 3 is disposed above the nozzle unit 1 and blows air from a first end 1 a toward a second end 1 b of the nozzle unit 1 in the first direction.
  • the control device 4 controls the ventilation device 3 .
  • the housing 10 a of each of the at least two nozzles 10 has a lower surface having a ventilation port 10 b extending in alignment with the first direction.
  • the ventilation port 10 b allows air sent into the housing 10 a to be blown out of the housing 10 a therethrough.
  • the control device 4 controls the ventilation device 3 , thereby changing the ventilation direction without providing each nozzle with a damper mechanism as disclosed in Patent Literature 1. That is, the ventilation system VS 1 is capable of changing the ventilation direction with a simplified structure of each nozzle 10 .
  • the first direction corresponds to a left/right direction aligned with the X axis
  • the second direction corresponds to a forward/backward direction aligned with the Y axis.
  • the ventilation system VS 1 is installed in a room R 1 .
  • the room R 1 is a space, such as a working space, a meeting room, a rest room, a waiting room, a reception room, or a living room in which a person or people are present.
  • the room R 1 has an upper surface which is a ceiling R 11
  • the room R 1 has a lower surface which is a floor R 12 .
  • the ventilation system VS 1 includes the nozzle unit 1 , the ventilation device 3 , and the control device 4 .
  • the nozzle unit 1 includes eight nozzles 10 .
  • the ventilation system VS 1 preferably further includes a first nozzle ventilator 21 and a second nozzle ventilator 22 .
  • the nozzle unit 1 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 are included in a ventilation unit U 1 .
  • the ventilation system VS 1 preferably includes an operation device 5 and a human detecting sensor 6 .
  • the ventilation unit U 1 is fixed to a lower surface of the ceiling R 11 with, for example, a hanger bolt or a wire which is not shown. As shown in FIGS. 2 to 4 , the ventilation unit U 1 includes the nozzle unit 1 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 .
  • the nozzle unit 1 includes the eight nozzles 10 .
  • the nozzles 10 include the respective housings 10 a each having a hollow rectangular plate shape with a long side extending in the left/right direction aligned with the X axis.
  • Each housing 10 a has a lower surface having, as the ventilation port 10 b , a rectangular opening with a long side extending in the left/right direction.
  • the ventilation port 10 b is formed in the lower surface of the housing 10 a at the center in the forward/backward direction.
  • the housings 10 a of the eight nozzles 10 are arranged parallel to each other in the forward/backward direction aligned with the Y axis.
  • the housing 10 a of one nozzle 10 has a front surface which faces a rear surface of the housing 10 a of another nozzle 10 disposed forward of, and adjacent to, the one nozzle 10 .
  • the housing 10 a of the one nozzle 10 has a rear surface which faces a front surface of the housing 10 a of still another nozzle 10 disposed rearward of, and adjacent to, the one nozzle 10 .
  • the housings 10 a are made of, for example, a resin material but may be made of a light-weight metal material such as aluminum.
  • the housings 10 a each have an internal space in which a partition plate 10 c is disposed at a center part in the longitudinal direction of a corresponding one of the housings 10 a .
  • the partition plate 10 c divides the internal space of the housing 10 a into two spaces, namely, a right space 10 d which is a space on the right and a left space 10 e which is a space on the left.
  • each housing 10 a has a right end having an opening 10 f .
  • the right space 10 d communicates with the outside of the housing 10 a via the opening 10 f .
  • the housing 10 a has a left end having an opening 10 g .
  • the left space 10 e communicates with the outside of the housing 10 a via the opening 10 g.
  • each of the right space 10 d and the left space 10 e are disposed a plurality of fins 10 h side by side in alignment with the X axis at regular intervals in the left/right direction.
  • the fins 10 h each have a plate shape extending upward from the lower surface under each of the right space 10 d and the left space 10 e and close a lower portion of each of the right space 10 d and the left space 10 e (part of a lower side of each of the right space 10 d and the left space 10 e ) when viewed in a direction aligned with the X axis.
  • the plurality of fins 10 h are located to separate the ventilation port 10 b at regular intervals in alignment with the X axis.
  • the first nozzle ventilator 21 is a cross flow fan. As shown in FIGS. 2 to 4 , the first nozzle ventilator 21 includes: a housing 21 a in the shape of a hollow parallelepiped; and a fan 21 b in the housing 21 a .
  • the first nozzle ventilator 21 is disposed at the right end (first end) 1 a of the nozzle unit 1 .
  • the housing 21 a has a left surface facing a right end surface of the nozzle unit 1 .
  • the housing 21 a is connected to a duct which is not shown, and the housing 21 a is supplied with air through the duct.
  • the left surface of the housing 21 a has a ventilation port 21 c (see FIG. 3 ).
  • the interior airflow F 11 is rectified by the fins 10 h in the right space 10 d and blows out downward through the ventilation port 10 b formed in the lower surface of the housing 10 a . Note that as shown in FIG. 5 A , the width of the lower portion of the right space 10 d in the forward/backward direction preferably narrows downward.
  • the second nozzle ventilator 22 is a cross flow fan. As shown in FIGS. 2 to 4 , the second nozzle ventilator 22 includes: a housing 22 a in the shape of a hollow parallelepiped; and a fan 22 b in the housing 22 a .
  • the second nozzle ventilator 22 is disposed at the left end (second end) 1 b of the nozzle unit 1 .
  • the housing 22 a has a right surface facing a left end surface of the nozzle unit 1 .
  • the housing 22 a is connected to a duct which is not shown, and the housing 22 a is supplied with air through the duct.
  • the right surface of the housing 22 a has a ventilation port 22 c (see FIG. 3 ).
  • the interior airflow F 12 is rectified by the fins 10 h in the left space 10 e and blows out downward through the ventilation port 10 b formed in the lower surface of the housing 10 a . Note that as shown in FIG. 5 B , the width of the lower portion of the left space 10 e in the forward/backward direction preferably narrows downward.
  • each of the eight nozzles 10 included in the nozzle unit 1 blows air downward through the ventilation port 10 b having an elongated shape and formed in the lower surface of a corresponding one of the housings 10 a , thereby producing ventilation airflow F 2 .
  • FIG. 6 shows arbitrary two nozzles 10 of the eight nozzles 10 included in the nozzle unit 1 , the two nozzles 10 being arranged side by side in alignment with the Y axis in the forward/backward direction.
  • a draw-in pathway 91 shown in FIG. 6 is formed between the two nozzles 10 adjacent to each other in the forward/backward direction.
  • the draw-in pathway 91 is a space provided between a rear surface of the housing 10 a of a forward one of the two nozzles 10 in the forward/backward direction and a front surface of the housing 10 a of a back one of the two nozzles 10 in the forward/backward direction such that the space is open upward and downward.
  • the ventilation amount of the nozzle unit 1 increases as the rotational velocity of each of the fans 21 b and 22 b increases, and the ventilation amount of the nozzle unit 1 decreases as the rotational velocity of each of the fans 21 b and 22 b decreases.
  • the rotational velocity of each of the fans 21 b and 22 b is controlled by the control device 4 .
  • the ventilation device 3 is a cross flow fan.
  • the ventilation device 3 is disposed above the nozzle unit 1 , sucks air therearound, and blows the air from the right end (first end) 1 a toward the left end (second end) 1 b of the nozzle unit 1 .
  • the ventilation device 3 is arranged above the first nozzle ventilator 21 (or above the right end 1 a of the nozzle unit 1 ).
  • the ventilation device 3 is fixed to a lower surface of the ceiling R 11 with, for example, a hanger bolt or a wire which is not shown.
  • the ventilation device 3 includes: a housing 3 a in the shape of a hollow parallelepiped; and a fan 3 b in the housing 3 a .
  • the housing 3 a has a left surface having a ventilation port 3 c . Air blown out leftward through the ventilation port 3 c by rotation of the fan 3 b is ventilation airflow F 21 flowing from right to left above the nozzle unit 1 .
  • the ventilation amount of the ventilation device 3 increases as the rotational velocity of the fan 3 b increases. Moreover, the ventilation amount of the ventilation device 3 decreases as the rotational velocity of the fan 3 b decreases. The rotational velocity of the fan 3 b is controlled by the control device 4 .
  • the control device 4 controls at least the ventilation device 3 .
  • the control device 4 controls the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 .
  • the control device 4 performs wired or wireless communication with the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 , thereby controlling the ventilation amount of each of the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 . Moreover, the control device 4 performs wired or wireless communication with the operation device 5 and the human detecting sensor 6 , thereby acquiring an operation signal from the operation device 5 and a sensor signal from the human detecting sensor 6 .
  • the wired communication is wired communication, for example, over a twisted pair cable, a dedicated communication line, or a local area network (LAN) cable.
  • the wireless communication is wireless communication compliant with the standard of, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), or low power radio (specified low power radio) requiring no license.
  • the human detecting sensor 6 detects the presence or absence of a person and the position of the person in the room R 1 and transmits a sensing result as a sensor signal to the control device 4 .
  • the control device 4 controls, based on the sensor signal received from the human detecting sensor 6 , the operation, the deactivation, and the ventilation amount during the operation of each of the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 .
  • control device 4 switches, based on the operation given by the user and received by the operation device 5 and the sensing result by the human detecting sensor 6 , between the operation and the deactivation of each of the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 , and adjusts the ventilation amount of each of the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 during the operation.
  • the control device 4 controls the ventilation device 3 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 , thereby adjusting the direction of airflow produced below the nozzle unit 1 .
  • the control device 4 causes the first nozzle ventilator 21 and the second nozzle ventilator 22 to enter an operating state and then adjusts the operation, the deactivation, and the ventilation amount of the ventilation device 3 , thereby changing the direction (ventilation direction) of the airflow produced below the nozzle unit 1 .
  • FIG. 7 shows straightly downward airflow F 31 which is airflow produced below the nozzle unit 1 when the first nozzle ventilator 21 and the second nozzle ventilator 22 are in the operating state and the ventilation device 3 is in a deactivated state.
  • the downward airflow F 1 is blowing downward out of the nozzle unit 1 .
  • no ventilation airflow F 21 is blowing out through the ventilation port 3 c of the ventilation device 3 .
  • the downward airflow F 1 blowing downward out of the nozzle unit 1 travels in the straightly downward direction (vertically downward direction), and the straightly downward airflow F 31 traveling in the straightly downward direction is produced below the nozzle unit 1 .
  • FIG. 8 shows diagonal airflow F 32 which is airflow produced below the nozzle unit 1 when the first nozzle ventilator 21 and the second nozzle ventilator 22 are in the operating state and the ventilation device 3 is also in the operating state.
  • the downward airflow F 1 is blowing downward out of the nozzle unit 1 .
  • the ventilation airflow F 21 is blowing out leftward through the ventilation port 3 c of the ventilation device 3 .
  • the ventilation airflow F 21 flowing from right to left above the nozzle unit 1 is drawn downward in the downward airflow F 1 blowing out of the nozzle unit 1 , passes between the two nozzles 10 adjacent to each other in the forward/backward direction, and travels diagonally downward to the left.
  • the downward airflow F 1 is drawn in the ventilation airflow F 21 traveling diagonally downward to the left below the nozzle unit 1 , and the downward airflow F 1 thus also travels diagonally downward to the left.
  • the diagonal airflow F 32 traveling diagonally downward to the left is produced below the nozzle unit 1 .
  • the control device 4 adjusts the ventilation amount of the ventilation device 3 , thereby controlling the traveling direction of the diagonal airflow F 32 .
  • the control device 4 periodically switches between the operation and the deactivation of the ventilation device 3 , thereby periodically switching between the straightly downward airflow F 31 (see FIG. 7 ) and the diagonal airflow F 32 (see FIG. 8 ).
  • the ventilation system VS 1 can produce swing airflow by the straightly downward airflow F 31 and the diagonal airflow F 32 alternately generated below the nozzle unit 1 .
  • control device 4 periodically increases and reduces the ventilation amount of the ventilation device 3 , thereby periodically changing the traveling direction of the diagonal airflow F 32 (see FIG. 8 ).
  • the control device 4 alternately repeats an increasing time period for increasing the ventilation amount of the ventilation device 3 and a reducing time period for reducing the ventilation amount of the ventilation device 3 .
  • the ventilation system VS 1 can produce swing airflow in which the traveling direction of the diagonal airflow F 32 continuously changes below the nozzle unit 1 .
  • control device 4 periodically increases and reduces the ventilation amount of the ventilation device 3 between zero and a target value, thereby achieving swing airflow continuously changing between the straightly downward airflow F 31 and the diagonal airflow F 32 .
  • the control device 4 controls the ventilation device 3 , thereby producing the straightly downward airflow F 31 and the diagonal airflow F 32 . Moreover, the control device 4 switches between the operation and the deactivation of the ventilation device 3 or periodically changes the ventilation amount of the ventilation device 3 , thereby producing the swing airflow. That is, the ventilation system VS 1 is capable of changing the ventilation direction without providing each nozzle with a damper mechanism. That is, the ventilation system VS 1 is capable of changing the ventilation direction with a simplified structure of each nozzle 10 .
  • FIGS. 9 and 10 show a ventilation unit U 2 as a variation of the ventilation unit. Note that the other configurations are similar to those of the embodiment described above, and similar components are denoted by the same reference signs as those in the embodiment, and the description thereof is omitted.
  • the ventilation unit U 2 corresponds to the ventilation unit U 1 further including a ventilation device 3 arranged above the second nozzle ventilator 22 (or above the left end 1 b of the nozzle unit 1 ).
  • a ventilation device 3 arranged above the first nozzle ventilator 21 is referred to as a first ventilation device 31
  • the ventilation device 3 arranged above the second nozzle ventilator 22 is referred to as a second ventilation device 32 .
  • the second ventilation device 32 has a housing 3 a which has a right surface having a ventilation port 3 c . Air blown out rightward through the ventilation port 3 c by rotation of a fan 3 b is ventilation airflow F 22 (see FIG. 10 ) flowing from left to right above the nozzle unit 1 .
  • control device 4 switches, based on the operation given by the user and received by the operation device 5 and the sensing result by the human detecting sensor 6 , between the operation and the deactivation of each of the first ventilation device 31 , the second ventilation device 32 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 , and adjusts the ventilation amount of each of the first ventilation device 31 , the second ventilation device 32 , the first nozzle ventilator 21 , and the second nozzle ventilator 22 during the operation.
  • control device 4 causes the first nozzle ventilator 21 and the second nozzle ventilator 22 to enter an operating state and then controls the operation, the deactivation, and the ventilation amount of each of the first ventilation device 31 and the second ventilation device 32 , thereby adjusting the direction (ventilation direction) of airflow to be produced below the nozzle unit 1 .
  • FIG. 11 shows straightly downward airflow F 41 which is airflow produced below the nozzle unit 1 when the first nozzle ventilator 21 and the second nozzle ventilator 22 are in the operating state and the first ventilation device 31 and the second ventilation device 32 are in the deactivated state.
  • the downward airflow F 1 is blowing downward out of the nozzle unit 1 .
  • none of the ventilation airflow F 21 and the ventilation airflow F 22 is blowing out through the ventilation port 3 c of the first ventilation device 31 and the second ventilation device 32 , respectively.
  • the downward airflow F 1 blowing downward out of the nozzle unit 1 travels in the straightly downward direction (vertically downward direction), and the straightly downward airflow F 41 traveling in the straightly downward direction is produced below the nozzle unit 1 .
  • FIG. 12 shows first diagonal airflow F 42 which is airflow produced below the nozzle unit 1 when the first nozzle ventilator 21 and the second nozzle ventilator 22 are in the operating state and the first ventilation device 31 is also in the operating state. At this time, the second ventilation device 32 is in the deactivated state.
  • the downward airflow F 1 is blowing downward out of the nozzle unit 1 .
  • the ventilation airflow F 21 is blowing leftward out of the ventilation port 3 c of the first ventilation device 31 .
  • the ventilation airflow F 21 flowing from right to left above the nozzle unit 1 is drawn downward in the downward airflow F 1 blowing out of the nozzle unit 1 , passes between the two nozzles 10 adjacent to each other in the forward/backward direction, and travels diagonally downward to the left.
  • the downward airflow F 1 is drawn in the ventilation airflow F 21 traveling diagonally downward to the left below the nozzle unit 1 , and the downward airflow F 1 thus also travels diagonally downward to the left.
  • the first diagonal airflow F 42 traveling diagonally downward to the As the ventilation amount of the first ventilation device 31 increases (as the air volume of the ventilation airflow F 21 increases), the traveling direction of the first diagonal airflow F 42 approaches the horizontal direction. Moreover, as the ventilation amount of the first ventilation device 31 decreases (as the air volume of the ventilation airflow F 21 decreases), the traveling direction of the first diagonal airflow F 42 approaches the straightly downward direction. That is, the control device 4 adjusts the ventilation amount of the first ventilation device 31 , thereby controlling the traveling direction of the first diagonal airflow F 42 .
  • FIG. 13 shows second diagonal airflow F 43 which is airflow produced below the nozzle unit 1 when the first nozzle ventilator 21 and the second nozzle ventilator 22 are in the operating state and the second ventilation device 32 is also in the operating state. At this time, the first ventilation device 31 is in the disabled state.
  • the downward airflow F 1 is blowing downward out of the nozzle unit 1 .
  • the ventilation airflow F 22 is blowing rightward through the ventilation port 3 c of the second ventilation device 32 .
  • the ventilation airflow F 22 flowing from left to right above the nozzle unit 1 is drawn downward in the downward airflow F 1 blowing out of the nozzle unit 1 , passes between the two nozzles 10 adjacent to each other in the forward/backward direction, and travels diagonally downward to the right.
  • the downward airflow F 1 is drawn in the ventilation airflow F 22 traveling diagonally downward to the right below the nozzle unit 1 , and the downward airflow F 1 also travels diagonally downward to the right.
  • the second diagonal airflow F 43 traveling diagonally downward to the right is produced below the nozzle unit 1 .
  • the control device 4 adjusts the ventilation amount of the second ventilation device 32 , thereby controlling the traveling direction of the second diagonal airflow F 43 .
  • the control device 4 can switch between the operation and the deactivation of each of the first ventilation device 31 and the second ventilation device 32 .
  • the control device 4 preferably alternately switches between an operation period of the first ventilation device 31 and an operation period of the second ventilation device 32 , thereby periodically switching between the first diagonal airflow F 42 (see FIG. 12 ) and the second diagonal airflow F 43 (see FIG. 13 ).
  • the ventilation system VS 1 can produce swing airflow by the first diagonal airflow F 42 and the second diagonal airflow F 43 alternately generated below the nozzle unit 1 . That is, the ventilation system VS 1 controls the first ventilation device 31 and the second ventilation device 32 , thereby extending a range within which the ventilation direction is changeable.
  • the control device 4 may provide, between the operation period of the first ventilation device 31 and the operation period of the second ventilation device 32 , a complete deactivation period during which both the first ventilation device 31 and the second ventilation device 32 are deactivated.
  • the ventilation system VS 1 can achieve, below the nozzle unit 1 , swing airflow by repeated generation of streams of airflow in the order of: first diagonal airflow F 42 ⁇ straightly downward airflow F 41 ⁇ second diagonal airflow F 43 ⁇ straightly downward airflow F 41 ⁇ first diagonal airflow F 42 .
  • the ventilation system VS 1 can produce smooth swing airflow.
  • control device 4 preferably increases the ventilation amount of the first ventilation device 31 from zero to a first target value and then reduces the ventilation amount to zero during the operation period of the first ventilation device 31 .
  • the traveling direction of the first diagonal airflow F 42 continuously changes below the nozzle unit 1 .
  • the control device 4 preferably increases the ventilation amount of the second ventilation device 32 from zero to a second target value and then reduces the ventilation amount to zero during the operation period of the second ventilation device 32 .
  • the traveling direction of the second diagonal airflow F 43 continuously changes below the nozzle unit 1 .
  • the ventilation system VS 1 can smoothly change the ventilation direction, thereby achieving swing airflow in which the traveling direction of each of the first diagonal airflow F 42 and the second diagonal airflow F 43 continuously changes.
  • the traveling direction of the first diagonal airflow F 42 gradually changes from the straightly downward direction to the left direction and then gradually returns from the left direction to the straightly downward direction.
  • the operation period of the first ventilation device 31 ends, and the operation period of the second ventilation device 32 starts.
  • the traveling direction of the second diagonal airflow F 43 gradually changes from the straightly downward direction to the right direction and then gradually returns from the right direction to the straightly downward direction.
  • the traveling direction of the second diagonal airflow F 43 returns to the straightly downward direction, the operation period of the second ventilation device 32 ends, and the operation period of the first ventilation device 31 starts. Repeating the operation described above achieves the swing airflow in which the traveling direction of each of the first diagonal airflow F 42 and the second diagonal airflow F 43 continuously changes.
  • control device 4 may continuously adjust the ratio between the ventilation amount of the first ventilation device 31 and the ventilation amount of the second ventilation device 32 , thereby continuously changing the ventilation direction of the swing airflow.
  • the control device 4 controls the first ventilation device 31 and the second ventilation device 32 in the first variation, thereby producing the straightly downward airflow F 41 , the first diagonal airflow F 42 , and the second diagonal airflow F 43 .
  • the control device 4 switches between the operation and the deactivation of each of the first ventilation device 31 and the second ventilation device 32 or periodically changes the ventilation amount of each of the first ventilation device 31 and the second ventilation device 32 , thereby producing the swing airflow. That is, the ventilation system VS 1 is capable of changing the ventilation direction without providing each nozzle with a damper mechanism. That is, the ventilation system VS 1 is capable of changing the ventilation direction with a simplified structure of each nozzle 10 .
  • Each of the first nozzle ventilator 21 , the second nozzle ventilator 22 , and the ventilation device 3 may be a component other than the cross flow fan and may be, for example, a sirocco fan or a propeller fan.
  • air suction of each of the first nozzle ventilator 21 , the second nozzle ventilator 22 , and the ventilation device 3 may be air suction via a duct or suction of air around the housing.
  • Each of the ventilation units U 1 and U 2 may include, as an alternative to the ventilation device 3 , a duct through which high-pressure air flows.
  • each nozzle 10 of the nozzle unit 1 is supplied with air from the duct.
  • the nozzle unit 1 includes at least two nozzles 10 .
  • a structural component to which each of the ventilation units U 1 and U 2 is to be attached is not limited to the ceiling R 11 but may be another structural component such as a mount disposed at an upper part in the room R 1 .
  • a ventilation system (VS 1 ) of a first aspect includes a nozzle unit ( 1 ), a ventilation device ( 3 ), and a control device ( 4 ).
  • the nozzle unit ( 1 ) includes at least two nozzles ( 10 ).
  • the at least two nozzles ( 10 ) each include a housing ( 10 a ) having a hollow elongated shape extending in alignment with a first direction, the at least two nozzles ( 10 ) being arranged side by side in alignment with a second direction intersecting the first direction.
  • the ventilation device ( 3 ) is arranged above the nozzle unit ( 1 ) and is configured to blow air from a first end ( 1 a ) toward a second end ( 1 b ) of the nozzle unit ( 1 ) in the first direction.
  • the control device ( 4 ) is configured to control the ventilation device ( 3 ).
  • the housing ( 10 a ) of each of the at least two nozzles ( 10 ) has a lower surface having a ventilation port ( 10 b ) extending in alignment with the first direction.
  • the ventilation port ( 10 b ) is configured to allow air sent into the housing ( 10 a ) to be blown out of the housing ( 10 a ) through the ventilation port ( 10 b ).
  • the ventilation system (VS 1 ) described above is capable of changing a ventilation direction with a simplified structure of the nozzles ( 10 ).
  • control device ( 4 ) is preferably configured to adjust a ventilation amount of the ventilation device ( 3 ).
  • the ventilation system (VS 1 ) described above adjusts the ventilation amount of the ventilation device ( 3 ), thereby smoothly changing the ventilation direction.
  • control device ( 4 ) is preferably configured to periodically increase and reduce a ventilation amount of the ventilation device ( 3 ).
  • the ventilation system (VS 1 ) described above is configured to produce swing airflow.
  • the ventilation device ( 3 ) is preferably a first ventilation device ( 31 ), and the ventilation system (VS 1 ) preferably further includes a second ventilation device ( 32 ).
  • the second ventilation device ( 32 ) is arranged above the nozzle unit ( 1 ) and is configured to blow air from the second end ( 1 b ) toward the first end ( 1 a ) in the first direction.
  • the control device ( 4 ) is configured to control the first ventilation device ( 31 ) and the second ventilation device ( 32 ).
  • the ventilation system (VS 1 ) described above controls the first ventilation device ( 31 ) and the second ventilation device ( 32 ), thereby extending a range within which the ventilation direction is changeable.
  • control device ( 4 ) is preferably configured to alternately switch between an operation period of the first ventilation device ( 31 ) and an operation period of the second ventilation device ( 32 ).
  • the ventilation system (VS 1 ) described above is configured to produce swing airflow in a further extended range.
  • control device ( 4 ) is preferably configured to provide, between the operation period of the first ventilation device ( 31 ) and the operation period of the second ventilation device ( 32 ), a complete deactivation period during which both the first ventilation device ( 31 ) and the second ventilation device ( 32 ) are deactivated.
  • the ventilation system (VS 1 ) described above is configured to produce smooth swing airflow.
  • control device ( 4 ) is preferably configured to adjust a ventilation amount of each of the first ventilation device ( 31 ) and the second ventilation device ( 32 ).
  • the ventilation system (VS 1 ) described above adjusts the ventilation amount of each of the first ventilation device ( 31 ) and the second ventilation device ( 32 ), thereby smoothly changing the ventilation direction.
  • the control device ( 4 ) is preferably configured to increase the ventilation amount of the first ventilation device ( 31 ) from zero to a first target value and then reduce the ventilation amount to zero during the operation period of the first ventilation device ( 31 ).
  • the control device ( 4 ) is preferably configured to increase the ventilation amount of the second ventilation device ( 32 ) from zero to a second target value and then reduce the ventilation amount to zero during the operation period of the second ventilation device ( 32 ).
  • the ventilation system (VS 1 ) described above is configured to smoothly change the ventilation direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air-Flow Control Members (AREA)
US19/106,099 2022-09-16 2023-08-24 Ventilation system Pending US20260063325A1 (en)

Applications Claiming Priority (3)

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JP2022-148382 2022-09-16
JP2022148382 2022-09-16
PCT/JP2023/030512 WO2024057863A1 (ja) 2022-09-16 2023-08-24 送風システム

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JP5828134B2 (ja) * 2011-07-06 2015-12-02 パナソニックＩｐマネジメント株式会社 送風装置
JP6767616B2 (ja) * 2016-06-27 2020-10-14 パナソニックＩｐマネジメント株式会社 送風装置
JP6745427B2 (ja) * 2016-06-30 2020-08-26 パナソニックＩｐマネジメント株式会社 送風装置
JP7065272B2 (ja) * 2018-02-26 2022-05-12 パナソニックＩｐマネジメント株式会社 送風装置
JP7050222B2 (ja) * 2018-02-26 2022-04-08 パナソニックＩｐマネジメント株式会社 送風装置
WO2022091439A1 (ja) * 2020-10-30 2022-05-05 パナソニックＩｐマネジメント株式会社 送風装置

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