WO2021181695A1 - Unité intérieure et dispositif de climatisation - Google Patents

Unité intérieure et dispositif de climatisation Download PDF

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Publication number
WO2021181695A1
WO2021181695A1 PCT/JP2020/011236 JP2020011236W WO2021181695A1 WO 2021181695 A1 WO2021181695 A1 WO 2021181695A1 JP 2020011236 W JP2020011236 W JP 2020011236W WO 2021181695 A1 WO2021181695 A1 WO 2021181695A1
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WO
WIPO (PCT)
Prior art keywords
centrifugal fan
indoor unit
plate
heat exchanger
apex
Prior art date
Application number
PCT/JP2020/011236
Other languages
English (en)
Japanese (ja)
Inventor
惇司 河野
拓矢 寺本
栗原　誠
一樹 磯村
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2020/011236 priority Critical patent/WO2021181695A1/fr
Priority to JP2022505720A priority patent/JP7378574B2/ja
Priority to EP20923935.9A priority patent/EP4119863A4/fr
Publication of WO2021181695A1 publication Critical patent/WO2021181695A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0022—Centrifugal or radial fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • This disclosure relates to an indoor unit and an air conditioner.
  • This four-direction cassette type indoor unit is configured so that the wind blows out in four directions while being embedded in the ceiling.
  • This four-way cassette type indoor unit includes a centrifugal fan, a heat exchanger arranged so as to surround the centrifugal fan, and a partition plate connecting both ends of the heat exchanger.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 9-49640 describes a four-way cassette type indoor unit.
  • the partition plate is configured to project inside the heat exchanger.
  • the present disclosure has been made in view of the above problems, and an object thereof is to suppress the pressure loss of the airflow flowing through the heat exchanger on the downstream side in the rotation direction of the centrifugal fan, and to rotate the centrifugal fan. It is to provide an indoor unit capable of facilitating the inflow of airflow into a heat exchanger on the upstream side in the direction and an air conditioner equipped with the indoor unit.
  • the indoor unit of the present disclosure includes a housing, a centrifugal fan, a heat exchanger, and a partition plate.
  • the centrifugal fan is housed in a housing, has a rotating shaft, and is configured to be rotatable around the rotating shaft.
  • the heat exchanger is arranged so as to surround three-quarters or more of the outer circumference of the centrifugal fan, and has a gap between the first end and the first end arranged on the upstream side in the rotation direction of the centrifugal fan. It has a second end located downstream in the direction of rotation of the centrifugal fan.
  • the partition plate has protrusions protruding from the first and second ends of the heat exchanger toward the centrifugal fan. The apex of the convex portion of the partition plate is arranged closer to the first end than to the second end.
  • the apex of the convex portion of the partition plate is arranged closer to the first end than the second end. Therefore, it is possible to suppress the pressure loss of the airflow flowing through the heat exchanger on the downstream side in the rotation direction of the centrifugal fan. In addition, the inflow of airflow into the heat exchanger on the upstream side in the rotation direction of the centrifugal fan can be promoted.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the first embodiment is removed.
  • FIG. 5 is a perspective view schematically showing a configuration in which the panel of the indoor unit according to the first embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which a panel of a modified example of the indoor unit according to the first embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the second embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the third embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the fourth embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the fifth embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the sixth embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the seventh embodiment is removed.
  • FIG. 5 is a perspective view schematically showing a configuration in which the panel of the indoor unit according to the seventh embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the eighth embodiment is removed.
  • FIG. 5 is a perspective view schematically showing a configuration in which the panel of the indoor unit according to the eighth embodiment is removed.
  • FIG. 5 is a bottom view schematically showing a configuration in which the panel of the indoor unit according to the ninth embodiment is removed.
  • FIG. 5 is a perspective view schematically showing a configuration in which the panel of the indoor unit according to the ninth embodiment is removed.
  • FIG. 5 is a refrigerant circuit diagram of the air conditioner according to the tenth embodiment.
  • Embodiment 1 The configuration of the indoor unit 1 according to the first embodiment will be described with reference to FIGS. 1 to 4.
  • the indoor unit 1 according to the first embodiment is a four-way cassette type indoor unit.
  • the indoor unit 1 according to the first embodiment is a ceiling-embedded indoor unit.
  • the indoor unit 1 according to the first embodiment is an indoor unit of a packaged air conditioner.
  • FIG. 1 is a perspective view showing the indoor unit 1 according to the first embodiment from below.
  • the indoor unit 1 according to the first embodiment is embedded in the ceiling in the state shown in FIG.
  • FIG. 2 is a cross-sectional view showing the internal structure of the indoor unit 1 according to the first embodiment from the side.
  • FIG. 3 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the first embodiment is removed from below. In FIG. 3, for the sake of clarity, the piping connected to the heat exchanger 4 is not shown. Further, in FIGS. 3 and 3 onward, the configuration is simplified and illustrated for easy viewing.
  • FIG. 4 is a perspective view showing a configuration in which the panel 22 of the indoor unit 1 according to the first embodiment is removed from below.
  • the indoor unit 1 includes a housing 2, a centrifugal fan 3, a heat exchanger 4, a partition plate 5, a motor 6, and a bell mouth 7.
  • the filter 8 is provided.
  • a centrifugal fan 3, a heat exchanger 4, a partition plate 5, a motor 6, a bell mouth 7, and a filter 8 are housed in the housing 2.
  • the housing 2 has a casing 21 and a panel 22.
  • the casing 21 has a top plate portion 21a and a side wall portion 21b.
  • the top plate portion 21a is arranged at the upper end of the casing 21.
  • the side wall portion 21b is connected to the outer edge of the top plate portion 21a.
  • the side wall portion 21b extends from the top plate portion 21a toward the panel 22.
  • the side wall portion 21b is configured to surround the heat exchanger 4.
  • the panel 22 is attached to the lower end of the casing 21.
  • the panel 22 is configured to have a substantially square shape.
  • the panel 22 has a suction port 23, an outlet 24, and a louver 25. At least one suction port 23 is provided on the panel 22. At least one outlet 24 is provided on the panel 22.
  • the panel 22 is provided with one suction port 23 and four outlets 24.
  • the suction port 23 is configured to have a substantially square shape.
  • the suction port 23 is arranged in the center of the panel 22.
  • a grill is provided at the suction port 23.
  • each of the four outlets 24 is configured to have a substantially rectangular shape.
  • each of the four outlets 24 is located outside the suction port 23.
  • Each of the four outlets 24 is provided between the outer edge of the panel 22 and the suction port 23.
  • the four outlets 24 are arranged on all sides of the suction port 23.
  • Each of the four outlets 24 is arranged along each of the four sides of the panel 22.
  • Each of the four louvers 25 is arranged in each of the four outlets 24.
  • the louver 25 is configured to adjust the flow of the airflow blown out from the outlet 24 in the vertical direction and the horizontal direction.
  • the centrifugal fan 3 is housed in the housing 2.
  • the centrifugal fan 3 has a rotation shaft 3a.
  • the centrifugal fan 3 is configured to be rotatable around a rotation shaft 3a.
  • the plan view is a view when the centrifugal fan 3 is viewed along the rotation axis 3a.
  • the centrifugal fan 3 is configured to generate an air flow by rotating around a rotation shaft 3a.
  • the heat exchanger 4 is arranged between the side wall portion 21b of the housing 2 and the centrifugal fan 3.
  • the heat exchanger 4 is arranged with a gap from the side wall portion 21b of the housing 2.
  • the heat exchanger 4 is arranged with a gap from the centrifugal fan 3.
  • the heat exchanger 4 is arranged in a flow path of air that is sucked into the housing 2 from the suction port 23 by the centrifugal fan 3 and blown out into the room (target space) from the four outlets 24. In the heat exchanger 4, heat exchange is performed between the air flowing outside the heat exchanger 4 and the refrigerant flowing inside the heat exchanger 4.
  • the heat exchanger 4 has a plurality of fins F and a heat transfer tube P.
  • the plurality of fins F are arranged at intervals from each other.
  • the heat transfer tube P extends so as to penetrate the plurality of fins F.
  • the heat transfer tube P is configured so that the refrigerant flows inside the heat transfer tube P.
  • the partition plate 5 is connected to both ends of the heat exchanger 4.
  • the partition plate 5 is arranged with a gap from the side wall portion 21b of the housing 2.
  • the partition plate 5 is arranged at a distance from the centrifugal fan 3.
  • the partition plate 5 is formed in a plate shape.
  • the partition plate 5 is configured to partition the space where the centrifugal fan 3 is located and the space where the piping connected to the heat exchanger 4 is located.
  • the motor 6 is arranged in the center of the top plate portion 21a of the casing 21.
  • the motor 6 is attached to the center of the top plate portion 21a of the casing 21.
  • the motor 6 has a drive unit 61, a motor shaft 62, and a connecting member 63.
  • the drive unit 61 is configured to rotate the motor shaft 62.
  • the drive unit 61 is attached to the center of the top plate portion 21a of the casing 21.
  • the motor shaft 62 is configured to rotate in the circumferential direction of the motor shaft 62.
  • the motor shaft 62 extends from the drive unit 61 toward the panel 22.
  • the connecting member 63 is attached to the outer peripheral surface of the motor shaft 62.
  • the connecting member 63 is configured to connect the motor shaft 62 and the centrifugal fan 3.
  • the motor 6 is configured to rotate the centrifugal fan 3 in the rotation direction of the motor shaft 62.
  • a bell mouth 7 is arranged between the centrifugal fan 3 and the suction port 23 of the panel 22.
  • the bell mouth 7 is configured to guide the air sucked from the suction port 23 of the panel 22 to the centrifugal fan 3.
  • a filter 8 is arranged between the bell mouth 7 and the suction port 23 of the panel 22.
  • the filter 8 is configured to remove dust from the air that has flowed into the housing 2 from the suction port 23 of the panel 22.
  • the centrifugal fan 3 is configured to have a substantially circular shape.
  • the centrifugal fan 3 has a main plate 31, a side plate 32, and a plurality of blades 33.
  • the main plate 31 is connected to the connecting member 63 of the motor 6.
  • the main plate 31 has a central portion 31a, a first flat plate portion 31b, an inclined portion 31c, and a second flat plate portion 31d.
  • the central portion 31a is arranged at the center of the main plate 31.
  • the central portion 31a is formed in a substantially cylindrical shape.
  • a through hole H is provided in the central portion 31a.
  • the connecting member 63 is attached to the central portion 31a in a state where the connecting member 63 is inserted into the through hole H of the central portion 31a.
  • the main plate 31 is attached to the motor shaft 62 of the motor 6 via the connecting member 63. Therefore, the main plate 31 can be rotated about the rotation shaft 3a by the rotational force of the motor 6.
  • the first flat plate portion 31b is connected to the central portion 31a. In a plan view, the first flat plate portion 31b is arranged outside the central portion 31a.
  • the inclined portion 31c is connected to the first flat plate portion 31b. In a plan view, the inclined portion 31c is arranged outside the first flat plate portion 31b.
  • the inclined portion 31c is inclined so as to spread from the first flat plate portion 31b toward the second flat plate portion 31d.
  • the second flat plate portion 31d is connected to the inclined portion 31c. In a plan view, the second flat plate portion 31d is arranged outside the inclined portion 31c.
  • the second flat plate portion 31d is arranged closer to the top plate portion 21a of the housing 2 than the first flat plate portion 31b.
  • the side plate 32 is arranged at a distance from the main plate 31 in the extending direction of the rotation shaft 3a. In a plan view, the side plate 32 is formed in an annular shape. An opening OP is provided in the center of the side plate 32. The centrifugal fan 3 is configured so that air flows into the centrifugal fan 3 from the opening OP. In a plan view, the side plate 32 is arranged on the outer edge of the centrifugal fan 3.
  • the plurality of wings 33 are arranged between the main plate 31 and the side plate 32.
  • the plurality of wings 33 are arranged on the second flat plate portion 31d of the main plate 31.
  • the upper ends of each of the plurality of blades 33 are attached to the second flat plate portion 31d of the main plate 31.
  • the lower ends of each of the plurality of wings 33 are attached to the side plates 32.
  • the heat exchanger 4 is arranged so as to surround the centrifugal fan 3 in the circumferential direction of the centrifugal fan 3.
  • the heat exchangers 4 are arranged in a substantially square shape.
  • the heat exchanger 4 is arranged so as to surround three-quarters or more of the outer circumference of the centrifugal fan 3.
  • the heat exchangers 4 are arranged on all sides of the centrifugal fan 3.
  • the heat exchanger 4 has a first end 41 and a second end 42.
  • the first end 41 is one end in the circumferential direction of the heat exchanger 4.
  • the second end 42 is the other end in the circumferential direction of the heat exchanger 4.
  • the first end 41 and the second end 42 are arranged with a gap from each other.
  • the first end 41 and the second end 42 are arranged at one corner of the heat exchanger 4 in a substantially quadrangular shape. That is, the first end 41 and the second end 42 are arranged at one corner of the casing 21.
  • the first end 41 is arranged on the upstream side in the rotation direction of the centrifugal fan 3. That is, the first end 41 is arranged on the upstream side of the second end 42 in the rotation direction of the centrifugal fan 3.
  • the second end 42 is arranged on the downstream side in the rotation direction of the centrifugal fan 3 with a gap from the first end 41. That is, the second end 42 is arranged on the downstream side of the first end 41 in the rotation direction of the centrifugal fan 3.
  • the partition plate 5 is connected to both ends of the heat exchanger 4 in the circumferential direction. That is, the partition plate 5 is connected to the first end 41 and the second end 42.
  • the partition plate 5 has a convex portion 51.
  • the convex portion 51 projects from the first end 41 and the second end 42 of the heat exchanger 4 toward the centrifugal fan 3.
  • the convex portion 51 protrudes toward the centrifugal fan 3 side from the virtual line connecting the first end 41 and the second end 42 on the inner peripheral side of the heat exchanger 4.
  • the apex TP of the convex portion 51 of the partition plate 5 is arranged closer to the first end 41 than to the second end 42.
  • the apex TP is arranged on the upstream side in the rotation direction of the centrifugal fan 3 from the midpoint of the virtual line connecting the first end 41 and the second end 42 on the inner peripheral side of the heat exchanger 4. That is, the apex TP is located on the opposite rotation direction side of the centrifugal fan 3 from the midpoint of the virtual line connecting the first end and the second end 42 on the inner peripheral side of the heat exchanger 4.
  • the convex portion 51 of the partition plate 5 has a first plate portion 51a and a second plate portion 51b.
  • the first plate portion 51a is configured to connect the apex TP and the first end 41.
  • the second plate portion 51b is configured to connect the apex TP and the second end 42.
  • the length of the first plate portion 51a is shorter than the length of the second plate portion 51b.
  • the portion where the first plate portion 51a and the second plate portion 51b are connected to each other constitutes the vertex TP.
  • the vertex TP is configured to be sharp.
  • the rotation of the centrifugal fan 3 causes the air in the room (target space) to be sucked into the housing 2 from the suction port 23 of the panel 22. Dust is removed by the filter 8 from the air sucked into the housing 2 from the suction port 23 of the panel 22.
  • the air that has passed through the filter 8 is guided to the centrifugal fan 3 by the bell mouth 7.
  • the air sucked into the centrifugal fan 3 from the opening OP provided in the side plate 32 of the centrifugal fan 3 passes between the plurality of blades 33 and is blown outward in the radial direction of the centrifugal fan 3. The air thus blown out flows toward the heat exchanger 4.
  • a part of the air blown out from the centrifugal fan 3 flows toward the partition plate 5.
  • the airflow AF flowing through the partition plate 5 exchanges heat along the convex portion 51 of the partition plate 5 with the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 and the heat exchange on the downstream side in the rotation direction D1 of the centrifugal fan 3. It flows into the vessel 4b.
  • the airflow AF flows to the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 along the inner peripheral surface of the first plate portion 51a of the convex portion 51 of the partition plate 5.
  • the airflow AF flows along the inner peripheral surface of the second plate portion 51b of the convex portion 51 of the partition plate 5 to the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3.
  • the angle formed by the heat exchanger 4b on the downstream side of the rotation direction D1 of the centrifugal fan 3 and the second plate portion 51b of the convex portion 51 of the partition plate 5 is an obtuse angle. That is, the angle formed by the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3 and the second plate portion 51b of the convex portion 51 of the partition plate 5 is larger than 90 degrees. Therefore, the concentration of the airflow AF on the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3 is suppressed. Further, the peeling of the airflow AF from the second plate portion 51b of the convex portion 51 of the partition plate 5 is suppressed.
  • the angle formed by the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 and the first plate portion 51a of the convex portion 51 of the partition plate 5 is an acute angle. That is, the angle formed by the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 and the first plate portion 51a of the convex portion 51 of the partition plate 5 is smaller than 90 degrees. Therefore, the inflow of the airflow AF into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 is promoted.
  • FIG. 5 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the first embodiment is removed from below.
  • the first plate portion 51a and the second plate portion 51b are smoothly connected at the apex TP. That is, the vertex TP is composed of a curved surface.
  • the apex TP of the convex portion 51 of the partition plate 5 is arranged closer to the first end 41 than to the second end 42. Therefore, it is possible to suppress the concentration of the air flow on the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3. Therefore, it is possible to suppress the pressure loss of the airflow flowing through the heat exchanger 4b on the downstream side in the rotation direction of the centrifugal fan 3. Further, it is possible to promote the inflow of the air flow into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3.
  • Concentration of airflow to the heat exchanger 4b on the downstream side of the rotation direction D1 of the centrifugal fan 3 can be suppressed, and the inflow of airflow to the heat exchanger 4a on the upstream side of the rotation direction D1 of the centrifugal fan 3 is promoted. Therefore, the wind velocity distribution of the airflow passing through the heat exchanger 4 can be made uniform.
  • the partition plate 5 is partitioned from the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3.
  • the angle formed by the convex portion 51 of the plate 5 with the second plate portion 51b is an obtuse angle. Therefore, the angle formed by the heat exchanger 4b on the downstream side in the rotation direction D1 of the centrifugal fan 3 and the second plate portion 51b of the convex portion 51 of the partition plate 5 becomes gentle. Therefore, it is possible to suppress the separation of the airflow from the second plate portion 51b of the convex portion 51 of the partition plate 5.
  • the power consumption of the motor 6 for rotating the centrifugal fan 3 can be reduced. Further, since the pressure loss of the airflow flowing through the heat exchanger 4b on the downstream side in the rotation direction of the centrifugal fan 3 can be suppressed, the rotation speed of the centrifugal fan 3 can be reduced. Thereby, the noise generated by the rotation of the centrifugal fan 3 can be reduced.
  • the heat exchangers 4 are arranged on all sides of the centrifugal fan 3. Therefore, heat can be exchanged between the air flowing outside the heat exchanger 4 and the refrigerant flowing inside the heat exchanger 4 on all four sides of the centrifugal fan 3. Therefore, the 4-way cassette type indoor unit 1 can be configured.
  • FIG. 6 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the second embodiment is removed from below.
  • the virtual line connecting the rotating shaft 3a of the centrifugal fan 3 and the apex TP is set as the first virtual line A1 and the apex.
  • the virtual line connecting the TP and the first end 41 is referred to as the second virtual line A2
  • the virtual line connecting the vertex TP and the second end 42 is referred to as the third virtual line A3.
  • the first angle ⁇ a formed by the first virtual line A1 and the second virtual line A2 is larger than the second angle ⁇ b formed by the first virtual line A1 and the third virtual line A3.
  • the second virtual line A2 is arranged along the inner peripheral surface of the first plate portion 51a.
  • the third virtual line A3 is arranged along the inner peripheral surface of the second plate portion 51b.
  • the first angle ⁇ a formed by the first virtual line A1 and the second virtual line A2 is the second angle formed by the first virtual line A1 and the third virtual line A3. Greater than ⁇ b. Therefore, the angle formed by the direction of the air flow and the second virtual line A2 becomes small. Therefore, the separation of the airflow in the second plate portion 51b of the convex portion 51 of the partition plate 5 can be further suppressed.
  • FIG. 7 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the third embodiment is removed from below.
  • the apex TP is arranged on the upstream side in the rotation direction D1 of the centrifugal fan 3 with respect to the fourth virtual line A4.
  • the apex TP is arranged on the upstream side in the rotation direction of the centrifugal fan 3 with respect to the first end 41.
  • the apex TP is arranged upstream of the fourth virtual line A4 in the rotation direction D1 of the centrifugal fan 3. Therefore, the inflow of the air flow into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 can be further promoted. Therefore, the wind speed distribution of the airflow passing through the heat exchanger 4 can be made uniform.
  • FIG. 8 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the fourth embodiment is removed from below.
  • the convex portion 51 of the partition plate 5 has a first plate portion 51a that connects the apex TP and the first end 41.
  • the first plate portion 51a is configured to protrude toward the second end 42.
  • the first plate portion 51a is curved so as to protrude toward the second end 42.
  • the first plate portion 51a is curved so as to protrude toward the space where the pipe connected to the heat exchanger 4 is located.
  • the first plate portion 51a is configured to protrude toward the second end 42. Therefore, the air flow tends to flow vertically into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3. Therefore, the inflow of the air flow into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 can be further promoted.
  • FIG. 9 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the fifth embodiment is removed from below.
  • the convex portion 51 of the partition plate 5 has a second plate portion 51b that connects the apex TP and the second end 42.
  • the second plate portion 51b is configured to protrude toward the centrifugal fan 3.
  • the second plate portion 51b is curved so as to protrude toward the centrifugal fan 3.
  • the first plate portion 51a is configured to protrude toward the second end 42.
  • the second plate portion 51b is configured to protrude toward the centrifugal fan 3. Therefore, the separation of the airflow from the second plate portion 51b of the convex portion 51 of the partition plate 5 can be further suppressed.
  • the first plate portion 51a is configured to protrude toward the second end 42. Therefore, the air flow tends to flow vertically into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3. Therefore, the inflow of the air flow into the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 can be further promoted.
  • Embodiment 6 The configuration of the indoor unit 1 according to the sixth embodiment will be described with reference to FIG.
  • FIG. 10 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the sixth embodiment is removed from below.
  • the distance (first distance) n between the centrifugal fan 3 and the apex TP is shorter than the distance (second distance) m between the centrifugal fan 3 and the heat exchanger 4.
  • the distance n between the centrifugal fan 3 and the apex TP is the shortest distance between the centrifugal fan 3 and the apex TP when the centrifugal fan 3 is viewed along the rotation axis 3a.
  • the distance m between the centrifugal fan 3 and the heat exchanger 4 is the shortest distance between the centrifugal fan 3 and the apex TP when the centrifugal fan 3 is viewed along the rotation axis 3a.
  • the distance n between the centrifugal fan 3 and the apex TP is shorter than the distance m between the centrifugal fan 3 and the heat exchanger 4. Therefore, the pressure loss of the airflow flowing through the heat exchanger 4b on the downstream side in the rotation direction of the centrifugal fan 3 can be suppressed, and the airflow to the heat exchanger 4a on the upstream side in the rotation direction D1 of the centrifugal fan 3 can be suppressed. The effect of promoting inflow can be sufficiently ensured.
  • Embodiment 7 The configuration of the indoor unit 1 according to the seventh embodiment will be described with reference to FIGS. 11 and 12.
  • FIG. 11 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the seventh embodiment is removed from below.
  • FIG. 12 is a perspective view showing a configuration in which the panel 22 of the indoor unit 1 according to the seventh embodiment is removed from below.
  • the centrifugal fan 3 has a main plate 31 and a side plate 32 connected to the main plate 31.
  • the convex portion 51 of the partition plate 5 has a second plate portion 51b that connects the apex TP and the second end 42.
  • the second plate portion 51b has a main plate side portion 51b1 facing the main plate 31 and a side plate side portion 51b2 facing the side plate 32.
  • the side plate side portion 51b2 is configured to project toward the centrifugal fan 3 from the main plate side portion 51b1.
  • the angle formed by the virtual line connecting the rotating shaft 3a of the centrifugal fan 3 and the apex TP of the convex portion 51 of the partition plate 5 and the side plate side portion 51b2 is virtual. It is smaller than the angle formed by the wire and the main plate side portion 51b1.
  • the side plate side portion 51b2 is configured to project toward the centrifugal fan 3 from the main plate side portion 51b1.
  • the swirling component of the airflow blown out from the centrifugal fan 3 in the rotation direction D1 of the centrifugal fan 3 is larger on the side plate 32 side than on the main plate 31 side. Since the side plate side portion 51b2 is configured to project toward the centrifugal fan 3 from the main plate side portion 51b1, it is possible to suppress the separation of the air flow in the second plate portion 51b of the convex portion 51 of the partition plate 5. ..
  • Embodiment 8 The configuration of the indoor unit 1 according to the eighth embodiment will be described with reference to FIGS. 13 and 14.
  • FIG. 13 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the eighth embodiment is removed from below.
  • FIG. 14 is a perspective view showing a configuration in which the panel 22 of the indoor unit 1 according to the seventh embodiment is removed from below.
  • the centrifugal fan 3 has a main plate 31 and a side plate 32 connected to the main plate 31.
  • the convex portion 51 of the partition plate 5 has a second plate portion 51b that connects the apex TP and the second end 42.
  • the second plate portion 51b has a main plate side portion 51b1 facing the main plate 31 and a side plate side portion 51b2 facing the side plate 32.
  • the distance between the centrifugal fan 3 and the apex TP of the main plate side portion 51b1 is longer than the distance between the centrifugal fan 3 and the apex TP of the side plate side portion 51b2.
  • the shortest distance between the centrifugal fan 3 and the apex TP of the main plate side portion 51b1 is longer than the shortest distance between the centrifugal fan 3 and the apex TP of the side plate side portion 51b2. ..
  • the distance between the centrifugal fan 3 and the apex TP of the main plate side portion 51b1 is longer than the distance between the centrifugal fan 3 and the apex TP of the side plate side portion 51b2.
  • the wind speed of the airflow blown out from the centrifugal fan 3 is higher on the main plate 31 side than on the side plate 32 side.
  • Embodiment 9 The configuration of the indoor unit 1 according to the ninth embodiment will be described with reference to FIGS. 15 and 16.
  • FIG. 15 is a bottom view showing a configuration in which the panel 22 of the indoor unit 1 according to the ninth embodiment is removed from below.
  • FIG. 16 is a perspective view showing a configuration in which the panel 22 of the indoor unit 1 according to the ninth embodiment is removed from below.
  • the partition plate 5 is provided with a slit SL.
  • the slit SL penetrates the partition plate 5 in the thickness direction.
  • a plurality of slit SLs are provided.
  • the slit SL is provided in the first plate portion 51a and the second plate portion 51b of the convex portion 51 of the partition plate 5, respectively.
  • the partition plate 5 is provided with the slit SL. Therefore, it is possible to prevent the pressure on the inner peripheral surface of the partition plate 5 from becoming too high. Thereby, noise can be suppressed.
  • Embodiment 10 The configuration of the air conditioner 100 according to the tenth embodiment will be described with reference to FIG.
  • FIG. 17 is a refrigerant circuit diagram of the air conditioner of the tenth embodiment.
  • the air conditioner 100 includes the indoor unit 1 described above.
  • the air conditioner 100 includes an indoor unit 1 and an outdoor unit 200.
  • the outdoor unit 200 is connected to the indoor unit 1.
  • the indoor unit 1 and the outdoor unit 200 are connected by a refrigerant pipe.
  • the refrigerant circuit is configured.
  • Refrigerant circulates in the refrigerant circuit.
  • the pipe through which the gaseous refrigerant (gas refrigerant) flows constitutes the gas pipe 300
  • the pipe through which the liquid refrigerant (liquid refrigerant or gas-liquid two-phase refrigerant) flows constitutes the liquid pipe 400. ..
  • the outdoor unit 200 includes a compressor 201, a four-way valve 202, an outdoor heat exchanger 203, an outdoor blower 204, and a throttle device (expansion valve) 205.
  • the compressor 201 is configured to compress and discharge the sucked refrigerant.
  • the compressor 201 is provided with an inverter device or the like, and is configured so that the capacity of the compressor 201 (the amount of refrigerant delivered per unit time) can be changed by changing the operating frequency.
  • the four-way valve 202 is configured to switch the flow of the refrigerant by switching the valve between the cooling operation and the heating operation based on an instruction from a control device (not shown).
  • the outdoor heat exchanger 203 is configured to exchange heat between the refrigerant inside the outdoor heat exchanger 203 and the air outside the outdoor heat exchanger 203 (outdoor air).
  • the outdoor heat exchanger 203 functions as a condenser during the cooling operation.
  • the refrigerant compressed in the compressor 201 flows into the outdoor heat exchanger 203 through the four-way valve 202.
  • heat exchange is performed between the refrigerant inside the outdoor heat exchanger 203 and the air outside the outdoor heat exchanger 203. As a result, the refrigerant condenses in the outdoor heat exchanger 203.
  • the outdoor heat exchanger 203 functions as an evaporator during the heating operation.
  • heat exchange is performed between the low-pressure refrigerant flowing from the liquid pipe 400 and the air.
  • the refrigerant evaporates in the outdoor heat exchanger 203.
  • an outdoor blower 204 having a fan, a fan motor, and the like is provided.
  • the outdoor blower 204 may be configured so that the rotation speed of the fan can be changed by changing the operating frequency of the fan motor by an inverter device.
  • the throttle device (expansion valve) 205 is configured to reduce the pressure of the refrigerant by expanding the refrigerant.
  • the indoor unit 1 includes a centrifugal fan 3 and a heat exchanger 4.
  • the centrifugal fan 3 is configured to regulate the flow of air in which heat exchange takes place in the heat exchanger 4.
  • the heat exchanger 4 functions as an evaporator during the cooling operation. Heat is exchanged between the refrigerant decompressed by the throttle device (expansion valve) 205 and flowing into the heat exchanger 4 and the air outside the heat exchanger 4. As a result, the refrigerant evaporates in the heat exchanger 4. The evaporated refrigerant flows out of the heat exchanger 4 through the gas pipe 300.
  • the heat exchanger 4 functions as a condenser during the heating operation.
  • Heat exchange is performed between the refrigerant flowing into the heat exchanger 4 from the gas pipe 300 and the air outside the heat exchanger 4. As a result, the refrigerant condenses in the heat exchanger 4. Therefore, the refrigerant is liquefied (or gas-liquid two-phase). The liquefied (or gas-liquid two-phase) refrigerant flows out to the liquid pipe 400.
  • the indoor unit 1 according to the first to ninth embodiments can be used. Therefore, according to the air conditioner 100 according to the tenth embodiment, it is possible to realize the air conditioner 100 that exhibits the effect of the indoor unit 1 according to the first to ninth embodiments.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Abstract

Une unité intérieure (1) comprend un boîtier (2), un ventilateur centrifuge (3), un échangeur de chaleur (4) et une plaque de séparation (5). Le ventilateur centrifuge (3) est logé dans le boîtier (2), comporte un arbre rotatif et est conçu de façon à pouvoir tourner autour de l'arbre rotatif. L'échangeur de chaleur (4) comporte : une première extrémité (41) qui est disposée de façon à entourer trois-quarts ou plus de la circonférence extérieure du ventilateur centrifuge (3) et qui est disposée sur le côté amont dans la direction de rotation du ventilateur centrifuge (3) ; et une seconde extrémité (42) qui est disposée sur le côté aval dans la direction de rotation du ventilateur centrifuge (3) en relation espacée par rapport à la première extrémité (41). La plaque de séparation (5) a une saillie (51) faisant saillie depuis la première extrémité (41) et la seconde extrémité (42) de l'échangeur de chaleur (4) vers le ventilateur centrifuge (3). Le sommet (TP) de la saillie (51) de la plaque de séparation (5) est situé plus près de la première extrémité (41) que de la seconde extrémité (42).
PCT/JP2020/011236 2020-03-13 2020-03-13 Unité intérieure et dispositif de climatisation WO2021181695A1 (fr)

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PCT/JP2020/011236 WO2021181695A1 (fr) 2020-03-13 2020-03-13 Unité intérieure et dispositif de climatisation
JP2022505720A JP7378574B2 (ja) 2020-03-13 2020-03-13 室内機および空気調和装置
EP20923935.9A EP4119863A4 (fr) 2020-03-13 2020-03-13 Unité intérieure et dispositif de climatisation

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0949640A (ja) 1995-08-09 1997-02-18 Sanyo Electric Co Ltd 空気調和機
JPH09133374A (ja) * 1995-11-08 1997-05-20 Mitsubishi Electric Corp 空気調和機
JP2005241069A (ja) * 2004-02-25 2005-09-08 Mitsubishi Heavy Ind Ltd 空気調和機
JP2012220163A (ja) * 2011-04-13 2012-11-12 Mitsubishi Heavy Ind Ltd 空気調和機
JP2015081692A (ja) * 2013-10-21 2015-04-27 日立アプライアンス株式会社 空気調和機の室内機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2956675B2 (ja) * 1998-01-16 1999-10-04 ダイキン工業株式会社 空気調和機
ES2409035T3 (es) * 2002-08-30 2013-06-24 Toshiba Carrier Corporation Aparato acondicionador de aire tipo empotrable en techo
EP3598020B1 (fr) * 2017-03-15 2021-12-22 Toshiba Carrier Corporation Unité intérieure pour climatiseur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0949640A (ja) 1995-08-09 1997-02-18 Sanyo Electric Co Ltd 空気調和機
JPH09133374A (ja) * 1995-11-08 1997-05-20 Mitsubishi Electric Corp 空気調和機
JP2005241069A (ja) * 2004-02-25 2005-09-08 Mitsubishi Heavy Ind Ltd 空気調和機
JP2012220163A (ja) * 2011-04-13 2012-11-12 Mitsubishi Heavy Ind Ltd 空気調和機
JP2015081692A (ja) * 2013-10-21 2015-04-27 日立アプライアンス株式会社 空気調和機の室内機

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EP4119863A4 (fr) 2023-04-26
JP7378574B2 (ja) 2023-11-13
EP4119863A1 (fr) 2023-01-18

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