WO2023152802A1 - Unité intérieure et dispositif de climatisation la comprenant - Google Patents

Unité intérieure et dispositif de climatisation la comprenant Download PDF

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Publication number
WO2023152802A1
WO2023152802A1 PCT/JP2022/004932 JP2022004932W WO2023152802A1 WO 2023152802 A1 WO2023152802 A1 WO 2023152802A1 JP 2022004932 W JP2022004932 W JP 2022004932W WO 2023152802 A1 WO2023152802 A1 WO 2023152802A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
peripheral end
centrifugal fan
casing
outer peripheral
Prior art date
Application number
PCT/JP2022/004932
Other languages
English (en)
Japanese (ja)
Inventor
惇司 河野
拓矢 寺本
誠 栗原
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 JP2023579896A priority Critical patent/JPWO2023152802A1/ja
Priority to PCT/JP2022/004932 priority patent/WO2023152802A1/fr
Publication of WO2023152802A1 publication Critical patent/WO2023152802A1/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
    • 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
    • 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

Definitions

  • the present disclosure relates to an indoor unit and an air conditioner having the same.
  • a heat exchanger is arranged radially around the centrifugal fan, the centrifugal fan and the heat exchanger are housed in a casing with a rectangular cross section perpendicular to the axis of the centrifugal fan, and the air sucked in the axial direction of the fan is radially
  • An indoor unit of an air conditioner that discharges air in a direction to pass through a heat exchanger, changes the direction of the air that has passed through the heat exchanger to the axial direction, and discharges it from a unit outlet formed in a casing in the direction opposite to the intake direction.
  • the end of the heat exchanger near the unit outlet in the axial direction of the centrifugal fan is a heat exchanger whose cross-sectional shape on a plane perpendicular to the axis of the centrifugal fan faces the outlet of the centrifugal fan.
  • a shape closer to a square is known (see, for example, Patent Document 1).
  • the short width of the air outlet is adjusted to reduce the airflow resistance of the air outlet from the heat exchanger to the outlet.
  • the heat exchanger is arranged at a position closer to the centrifugal fan on the inner peripheral side.
  • the shape of the cross section on the plane perpendicular to the axis of the centrifugal fan is circular at the heat exchanger located opposite the outlet of the centrifugal fan. Since the shape is similar, the length of the heat exchanger in the circumferential direction is also shortened, and the ventilation area of the heat exchanger is reduced. Therefore, the ventilation resistance of the heat exchanger increases, and the effect of reducing the ventilation resistance of the outlet air passage cannot be obtained sufficiently.
  • the purpose is to suppress the increase in pressure loss when passing through the heat exchanger, and to reduce the airflow resistance in the air passage leading to the outlet after passing through the heat exchanger, and an air conditioner equipped with the same. is to provide
  • An indoor unit includes a casing, a panel provided on a surface of the casing facing a target space and formed with an intake port and an air outlet, a centrifugal fan provided within the casing, and A heat exchanger provided on the outer peripheral side of the centrifugal fan; A blowing air passage leading to an outlet is formed, the heat exchanger has a first portion and a second portion arranged below the first portion, and the outer peripheral end of the centrifugal fan and the heat exchanger
  • the inner peripheral end of the first portion of the heat exchanger and the inner peripheral end of the second portion of the heat exchanger in a cross section parallel to the rotation axis of the centrifugal fan at a location closest to the inner peripheral end is arranged in parallel with the rotating shaft of the centrifugal fan, and the inner peripheral end of the first portion of the heat exchanger is arranged on the outer peripheral side of the inner peripheral end of the second portion of the heat exchanger and the distance L1 in the direction perpendicular to the rotating shaft from the outer peripheral end of
  • the rotation axis from the outer peripheral end of the second portion of the heat exchanger to the wall surface of the casing in the cross section is greater than the distance L4 in the direction perpendicular to the rotation axis from the outer peripheral end of the centrifugal fan to the inner peripheral end of the second portion of the heat exchanger in the cross section.
  • the indoor unit includes a casing, a panel provided on a surface of the casing facing a target space and having an inlet and an outlet, a centrifugal fan provided in the casing, and the casing.
  • a heat exchanger provided on the outer peripheral side of the centrifugal fan in the casing, and a drain pan provided below the heat exchanger in the casing, between the outer periphery of the drain pan and the wall surface of the casing
  • a blowout air passage leading to the blowout port is formed, and the heat exchanger has a first portion and a second portion arranged below the first portion, and the heat exchange is performed with the outer peripheral end of the centrifugal fan.
  • the inner peripheral end of the first portion of the heat exchanger and the second portion of the heat exchanger is arranged parallel to the rotation axis of the centrifugal fan, and the distance L1 in the direction perpendicular to the rotation axis from the outer peripheral edge of the first portion of the heat exchanger to the wall surface of the casing in the cross section is The distance L3 in the direction perpendicular to the rotation axis from the outer peripheral edge of the second portion of the heat exchanger to the wall surface of the casing in the cross section is smaller.
  • the air conditioner according to the present disclosure includes the indoor unit configured as described above.
  • FIG. 1 is a diagram showing the configuration of an air conditioner according to Embodiment 1.
  • FIG. 2 is a perspective view of an indoor unit included in the air conditioner according to Embodiment 1.
  • FIG. 2 is a longitudinal sectional view of an indoor unit included in the air conditioner according to Embodiment 1.
  • FIG. 2 is a cross-sectional view of an indoor unit included in the air conditioner according to Embodiment 1.
  • FIG. 4 is a longitudinal sectional view of a first modified example of the indoor unit included in the air-conditioning apparatus according to Embodiment 1.
  • FIG. 7 is a vertical cross-sectional view of a second modification of the indoor unit included in the air conditioner according to Embodiment 1; 8 is a longitudinal sectional view of a third modified example of the indoor unit included in the air conditioner according to Embodiment 1.
  • FIG. FIG. 9 is a longitudinal sectional view of a fourth modification of the indoor unit included in the air-conditioning apparatus according to Embodiment 1;
  • FIG. 11 is a vertical cross-sectional view of a fifth modification of the indoor unit included in the air conditioner according to Embodiment 1;
  • FIG. 11 is a vertical cross-sectional view of a sixth modification of the indoor unit included in the air conditioner according to Embodiment 1;
  • FIG. 11 is a vertical cross-sectional view of a seventh modification of the indoor unit included in the air conditioner according to Embodiment 1;
  • FIG. 1 is a diagram showing the configuration of an air conditioner.
  • FIG. 2 is a perspective view of an indoor unit included in the air conditioner.
  • FIG. 3 is a vertical cross-sectional view of an indoor unit included in the air conditioner.
  • FIG. 4 is a cross-sectional view of an indoor unit provided in the air conditioner.
  • FIG. 5 is a longitudinal sectional view of a first modified example of an indoor unit included in an air conditioner.
  • FIG. 6 is a vertical cross-sectional view of a second modification of the indoor unit included in the air conditioner.
  • FIG. 7 is a longitudinal sectional view of a third modified example of an indoor unit included in an air conditioner.
  • FIG. 1 is a diagram showing the configuration of an air conditioner.
  • FIG. 2 is a perspective view of an indoor unit included in the air conditioner.
  • FIG. 3 is a vertical cross-sectional view of an indoor unit included in the air conditioner.
  • FIG. 4 is a cross-sectional view of an indoor unit provided in the air conditioner.
  • FIG. 8 is a longitudinal sectional view of a fourth modification of the indoor unit provided in the air conditioner.
  • FIG. 9 is a longitudinal sectional view of a fifth modification of the indoor unit provided in the air conditioner.
  • FIG. 10 is a longitudinal sectional view of a sixth modification of the indoor unit provided in the air conditioner.
  • FIG. 11 is a longitudinal sectional view of a seventh modification of the indoor unit provided in the air conditioner.
  • the air conditioner includes an indoor unit 10 and an outdoor unit 20.
  • the indoor unit 10 is installed inside a room to be air-conditioned, that is, indoors.
  • the outdoor unit 20 is installed outside the room, that is, outdoors.
  • the indoor unit 10 includes an indoor unit heat exchanger 100 and a centrifugal fan 40 .
  • the outdoor unit 20 includes an outdoor unit heat exchanger 21 , an outdoor unit fan 22 , a compressor 23 , an expansion valve 24 and a four-way valve 25 .
  • the indoor unit 10 and the outdoor unit 20 are connected by a refrigerant pipe 30.
  • the refrigerant pipe 30 is circulatingly provided between the indoor unit heat exchanger 100 of the indoor unit 10 and the outdoor unit heat exchanger 21 of the outdoor unit 20 .
  • Refrigerant is sealed in the refrigerant pipe 30 .
  • the refrigerant enclosed in the refrigerant pipe 30 is, for example, difluoromethane (CH2F2:R32).
  • the refrigerant pipe 30 connects the indoor unit heat exchanger 100, the four-way valve 25, the compressor 23, the outdoor unit heat exchanger 21, and the expansion valve 24 in a ring. Therefore, a refrigerant circuit is formed in which the refrigerant circulates between the indoor heat exchanger 100 and the outdoor heat exchanger 21 .
  • the compressor 23 is a device that compresses the supplied refrigerant to increase the pressure and temperature of the refrigerant.
  • a rotary compressor, a scroll compressor, a reciprocating compressor, or the like can be used as the compressor 23, for example.
  • the expansion valve 24 expands the refrigerant condensed in the outdoor unit heat exchanger 21 and reduces the pressure of the refrigerant.
  • the indoor heat exchanger 100 exchanges heat between the refrigerant flowing into the indoor heat exchanger 100 and the air around the indoor heat exchanger 100 .
  • Centrifugal fan 40 blows indoor air so as to pass around indoor heat exchanger 100, promotes heat exchange between the refrigerant and air in indoor heat exchanger 100, and heat exchange Heated or cooled air is sent back into the room.
  • the outdoor heat exchanger 21 exchanges heat between the refrigerant that has flowed into the outdoor heat exchanger 21 and the air around the outdoor heat exchanger 21 .
  • the outdoor unit fan 22 blows outdoor air so as to pass around the outdoor unit heat exchanger 21 to promote heat exchange between the refrigerant and the air in the outdoor unit heat exchanger 21 .
  • the refrigerant circuit configured in this way exchanges heat between the refrigerant and the air in each of the indoor unit heat exchanger 100 and the outdoor unit heat exchanger 21, thereby Acts as a heat pump to move heat in At this time, by switching the four-way valve 25, the circulation direction of the refrigerant in the refrigerant circuit can be reversed to switch between the cooling operation and the heating operation of the air conditioner.
  • the indoor unit 10 of the configuration example described here is of the ceiling embedded type (ceiling cassette type). That is, the indoor unit 10 is embedded in the ceiling of the room.
  • the indoor unit 10 includes a casing 11 and a panel 12.
  • the casing 11 has a box shape with an open bottom surface.
  • Panel 12 is attached to the lower surface of casing 11 .
  • the casing 11 is embedded in the ceiling of the room.
  • Panel 12 is exposed into room 1 at the ceiling.
  • the lower surface of the casing 11 faces a space to be air-conditioned (hereinafter also referred to as “target space”). Therefore, the panel 12 is provided on the surface of the casing 11 facing the target space.
  • a suction port 13 and a blowout port 14 are formed in the panel 12 .
  • the suction port 13 is an opening for taking air into the casing 11 from the outside.
  • the air outlet 14 is an opening for discharging air from the inside of the casing 11 to the outside.
  • Panel 12 presents a square shape.
  • a suction port 13 is arranged in the central portion of the panel 12 .
  • a blowout port 14 is arranged along each side of the rectangular shape of the panel 12 . In the illustrated configuration example, the panel 12 is formed with four outlets 14 .
  • the indoor unit heat exchanger 100 and the centrifugal fan 40 are housed inside the casing 11 .
  • the centrifugal fan 40 is provided inside the casing 11 with the suction side directed downward. Centrifugal fan 40 is driven to rotate by fan motor 50 .
  • the fan motor 50 is attached to the top surface of the main body 3 .
  • a bell mouth 15 is provided below the centrifugal fan 40 and above the suction port 13 . Bell mouth 15 is for introducing air to centrifugal fan 40 .
  • the centrifugal fan 40 includes a main plate portion 42 , side plate portions 43 and a plurality of blades 41 .
  • the main plate portion 42 is a disk-shaped member with a raised central portion.
  • a shaft of the fan motor 50 is fixed to the center of the main plate portion 42 .
  • the plurality of blades 41 are arranged radially in the circumferential direction of the main plate portion 42 at the peripheral portion of the main plate portion 42 .
  • Each blade 41 has one end connected to the main plate portion 42 and the other end connected to the side plate portion 43 . That is, each of the plurality of blades 41 is arranged between the main plate portion 42 and the side plate portion 43 . The plurality of blades 41 are arranged at regular intervals from each other in the circumferential direction of the main plate portion 42 .
  • the side plate portion 43 is an annular member.
  • the side plate portion 43 is fixed to the end portion of the plurality of blades 41 on the side opposite to the main plate portion 42 and on the outer peripheral side. By connecting the plurality of wings 41 , the side plate portion 43 maintains the positional relationship between the tips of the wings 41 and reinforces the plurality of wings 41 .
  • An indoor unit heat exchanger 100 is provided on the outer peripheral side of the centrifugal fan 40 inside the casing 11 .
  • Indoor unit heat exchanger 100 is arranged to annularly surround centrifugal fan 40 .
  • heat is exchanged between the air in the room sucked from the suction port 13 by the centrifugal fan 40 and the refrigerant to generate cool air or warm air.
  • a drain pan 16 is provided below the indoor unit heat exchanger 100 in the casing 11 .
  • the drain pan 16 is for receiving condensed water generated by condensation of moisture in the air as the air is cooled during the heat exchange process in the indoor unit heat exchanger 100 .
  • a blowout air passage 17 leading to the blowout port 14 is formed between the outer periphery of the drain pan 16 and the wall surface of the casing 11 inside the casing 11 .
  • the air blown out from the centrifugal fan 40 passes through the indoor unit heat exchanger 100 from the inner peripheral side to the outer peripheral side.
  • the air is heated or cooled while passing through the indoor unit heat exchanger 100 . Whether the air is heated or cooled depends on whether the air conditioner is in cooling operation or heating operation.
  • the air that has passed through the indoor heat exchanger 100 passes between the indoor heat exchanger 100 and the wall surface of the casing 11, and then passes through the outlet air passage 17 between the drain pan 16 and the wall surface of the casing 11. It blows off from the blower outlet 14 .
  • the indoor unit heat exchanger 100 has a first portion 110 and a second portion 120 .
  • the second portion 120 is arranged below the first portion 110 .
  • the first portion 110 and the second portion 120 of the indoor heat exchanger 100 may be integrated or separated. In the illustrated example, the first portion 110 and the second portion 120 of the indoor heat exchanger 100 are separated.
  • the cross-sectional view of FIG. 3 is a cross-section including the rotating shaft of the centrifugal fan 40, at a point where the distance between the outer peripheral end of the centrifugal fan 40 and the inner peripheral end of the indoor unit heat exchanger 100 is the shortest. Since the cross section includes the rotation axis of centrifugal fan 40 , it is a cross section parallel to the rotation axis of centrifugal fan 40 . Such a section is, for example, section A shown in FIG. In the following description, the cross section parallel to the rotation axis of the centrifugal fan 40 at the point where the distance between the outer peripheral end of the centrifugal fan 40 and the inner peripheral end of the indoor heat exchanger 100 is the closest is represented by the cross section A. is simply referred to as "section A".
  • the inner peripheral end of the first portion 110 of the indoor heat exchanger 100 and the inner peripheral end of the second portion 120 of the indoor heat exchanger 100 are the rotation axis of the centrifugal fan 40. are arranged parallel to the Further, in cross section A, the inner peripheral end of first portion 110 of indoor heat exchanger 100 is arranged on the outer peripheral side of the inner peripheral end of second portion 120 of indoor heat exchanger 100 .
  • the distances L1, L2, L3 and L4 are defined as follows. It should be noted that the indoor unit 10 is usually installed so that the rotating shaft of the centrifugal fan 40 is vertical. In this case, the distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 may be rephrased as the horizontal distance.
  • Distance L1 Distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 to the wall surface of the casing 11 on the cross section A
  • Distance L2 Centrifugal fan 40 on the cross section A from the outer peripheral end of the indoor unit heat exchanger 100 to the inner peripheral end of the first portion 110 of the indoor heat exchanger 100 in the direction perpendicular to the rotation axis of the centrifugal fan 40
  • Distance L3 the second portion of the indoor heat exchanger 100 in the cross section A 120 to the wall surface of the casing 11 in the direction perpendicular to the rotation axis of the centrifugal fan 40.
  • Distance L4 From the outer peripheral end of the centrifugal fan 40 in the cross section A to the second portion 120 of the indoor unit heat exchanger 100. Distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 to the peripheral edge
  • the distance L1 in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 to the wall surface of the casing 11 in the cross section A is to the inner peripheral end of the first portion 110 of the indoor heat exchanger 100 in the direction perpendicular to the rotation axis of the centrifugal fan 40 .
  • a distance L3 in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral edge of the second portion 120 of the indoor heat exchanger 100 to the wall surface of the casing 11 in the cross section A is to the inner peripheral end of the second portion 120 of the indoor heat exchanger 100 in the direction perpendicular to the rotation axis of the centrifugal fan 40 .
  • the distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the centrifugal fan 40 to the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 in the cross section A is the same.
  • the width from the inner peripheral end to the outer peripheral end of the second portion 120 of the indoor heat exchanger 100 in the cross section A is the width from the inner peripheral end to the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 in the cross section A. greater than the width of
  • the first portion 110 of the indoor unit heat exchanger 100 is arranged facing between the main plate portion 42 and the side plate portion 43 of the centrifugal fan 40. . Most of the airflow blown out from between the main plate portion 42 and the side plate portion 43 of the centrifugal fan 40 passes through the first portion 110 rather than the second portion 120 of the indoor heat exchanger 100 . Therefore, the ventilation resistance of the indoor heat exchanger 100 is greatly affected by the size of the ventilation area of the first portion 110 .
  • the ventilation area of the indoor unit heat exchanger 100 is increased. , and the ventilation resistance in the first portion 110 of the indoor unit heat exchanger 100 can be reduced.
  • the second portion 120 of the indoor heat exchanger 100 by increasing the distance L3 to the wall surface of the casing 11, the blown air passes through the first portion 110 and the second portion 120 of the indoor heat exchanger 100. By enlarging the cross-sectional area of the air passage leading to the air passage 17 and the outlet, the ventilation resistance of this air passage can be reduced.
  • FIG. 5 is a cross-sectional view along cross-section A showing a first modification of the indoor unit 10.
  • the indoor heat exchanger 100 may be divided into three or more parts.
  • the indoor heat exchanger 100 further has a third portion 130 in addition to the first portion 110 and the second portion 120 .
  • the third portion 130 is arranged further below the second portion 120 .
  • the inner peripheral end of the third portion 130 of the indoor heat exchanger 100 is also arranged parallel to the rotation axis of the centrifugal fan 40, like the first portion 110 and the second portion 120.
  • the inner peripheral end of the third portion 130 of the indoor heat exchanger 100 is located closer to the inner peripheral side than the inner peripheral end of the second portion 120 of the indoor heat exchanger 100 .
  • the distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the centrifugal fan 40 to the outer peripheral end of the third portion 130 of the indoor heat exchanger 100 in the cross section A is A is the same as the distance in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the centrifugal fan 40 to the outer peripheral ends of the first portion 110 and the second portion 120 of the indoor heat exchanger 100 .
  • the width from the inner peripheral end to the outer peripheral end of the third portion 130 of the indoor heat exchanger 100 in the cross section A is the width from the inner peripheral end to the outer peripheral end of the second portion 120 of the indoor heat exchanger 100 in the cross section A. greater than the width of
  • FIG. 6 is a cross-sectional view along section A showing a second modification of the indoor unit 10.
  • the airflow after passing through the indoor unit heat exchanger 100 is turned downward, and the airflow passing through the indoor unit heat exchanger 100 gathers toward the lower side, increasing the wind speed. Therefore, in the air passage after passing through the indoor heat exchanger 100, since the wind speed is slower on the upper side than on the lower side, the distance from the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 to the wall surface of the casing 11 Even if the distance L1 is reduced, the effect of an increase in airflow resistance due to this can be suppressed. Therefore, while suppressing an increase in pressure loss when air passes through the indoor heat exchanger 100, it is possible to reduce the ventilation resistance in the air passage leading to the outlet 14 after passing through the indoor heat exchanger 100.
  • FIG. 7 is a cross-sectional view along section A showing a third modification of the indoor unit 10.
  • the width from the inner peripheral end to the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 in the cross section A is the width of the indoor heat exchanger 100 in the cross section A in the second modified example described above. is larger than the width from the inner peripheral end to the outer peripheral end of the second portion 120 .
  • the airflow from the centrifugal fan 40 is mainly blown out from between the main plate portion 42 and the side plate portion 43, the wind speed flowing into the upper first portion 110 of the indoor heat exchanger 100 is higher than that of the indoor unit. It is higher than the wind speed entering the lower second portion 120 of the heat exchanger 100 .
  • the speed of the airflow that has passed through the first portion 110 of the indoor heat exchanger 100 is slowed down, and after passing through the indoor heat exchanger 100 It is possible to make the wind velocity of the airflow uniform.
  • FIG. 8 is a cross-sectional view along section A showing a fourth modification of the indoor unit 10.
  • the outer diameter of the blade 41 on the main plate portion 42 side is larger than the outer diameter of the blade 41 on the side plate portion 43 side.
  • the outer diameter of the blade 41 gradually increases from the side plate portion 43 side toward the main plate portion 42 side.
  • FIG. 9 is a cross-sectional view along section A showing a fifth modification of the indoor unit 10.
  • FIG. 10 the upper end of the second portion 120 of the indoor heat exchanger 100 is arranged below the side plate portion 43 of the centrifugal fan 40 . Therefore, of the airflow from the centrifugal fan 40, the amount of air flowing into the second portion 120 on the lower side of the indoor heat exchanger 100 is reduced, and the amount of air flowing into the first portion 110 on the upper side of the indoor heat exchanger 100 is reduced. amount can be increased.
  • the distance L2 from the first portion 110 of the indoor heat exchanger 100 to the centrifugal fan 40 the distance for the airflow from the centrifugal fan 40 to flow into the indoor heat exchanger 100 can be lengthened.
  • the airflow from the centrifugal fan 40 has a swirl component that swirls in the rotation direction of the centrifugal fan 40 . Therefore, when the airflow from the centrifugal fan 40 flows into the indoor unit heat exchanger 100, the direction of the airflow is changed. By lengthening the distance for the airflow from the centrifugal fan 40 to flow into the indoor unit heat exchanger 100, it is possible to alleviate such abrupt turning of the airflow when flowing into the indoor unit heat exchanger 100, thereby reducing the indoor unit heat. It is possible to further reduce the ventilation resistance of the exchanger 100 .
  • FIG. 10 is a cross-sectional view along section A showing a sixth modification of the indoor unit 10.
  • the indoor unit 10 further includes a water conduit 121 .
  • the water guiding portion 121 is provided on the outer peripheral side of the second portion 120 of the indoor heat exchanger 100 .
  • the water guide section 121 guides the condensed water from the first portion 110 of the indoor heat exchanger 100 to the second portion 120 .
  • the water guide portion 121 is formed by extending the fins of the second portion 120 of the indoor heat exchanger 100 to the outer peripheral side.
  • the outer peripheral end of the water guide portion 121 is inclined so as to gradually move toward the inner peripheral side from top to bottom.
  • the condensed water collected at the lower end portion of the outer peripheral end of the first portion 110 is easily blown into the air passage. .
  • the dew condensation water generated in the first portion 110 of the indoor heat exchanger 100 can be guided to the second portion 120 via the water conveying portion 121 .
  • the condensed water guided to the second portion 120 can be collected in the drain pan. Therefore, it is possible to prevent the condensed water generated in the first portion 110 from being blown into the air passage from the first portion 110 and discharged to the outside of the casing 11 from the air outlet 14 .
  • FIG. 11 is a cross-sectional view along section A showing a seventh modification of the indoor unit 10.
  • the indoor unit heat exchanger 100 has a first portion 110 and a second portion 120, as in the previous configuration examples.
  • the first portion 110 and the second portion 120 are integrated.
  • the inner peripheral end of the first portion 110 of the indoor heat exchanger 100 and the inner peripheral end of the second portion 120 of the indoor heat exchanger 100 are arranged parallel to the rotating shaft of the centrifugal fan 40. ing.
  • the distance L1 mentioned above is smaller than the distance L3 mentioned above. That is, the distance L1 in the direction perpendicular to the rotation axis of the centrifugal fan 40 from the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 in the cross section A to the wall surface of the casing 11 is from the outer peripheral end of the second portion 120 to the wall surface of the casing 11 in the direction perpendicular to the rotation axis of the centrifugal fan 40.
  • the distance L2 described above is the same as the distance L4 described above.
  • the width from the inner peripheral end to the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 in the cross section A is the width from the inner peripheral end to the outer peripheral end of the second portion 120 of the indoor heat exchanger 100 in the cross section A. greater than the width of
  • the airflow after passing through the indoor unit heat exchanger 100 is turned downward, and passes through the indoor unit heat exchanger 100 toward the bottom.
  • the air currents gather and the wind speed increases. Therefore, in the air passage after passing through the indoor heat exchanger 100, since the wind speed is slower on the upper side than on the lower side, the distance from the outer peripheral end of the first portion 110 of the indoor heat exchanger 100 to the wall surface of the casing 11 Even if the distance L1 is reduced, the effect of an increase in airflow resistance due to this can be suppressed. Therefore, while suppressing an increase in pressure loss when air passes through the indoor heat exchanger 100, it is possible to reduce the ventilation resistance in the air passage leading to the outlet 14 after passing through the indoor heat exchanger 100.
  • the width of the first portion 110 of the indoor heat exchanger 100 is made larger than the width of the second portion 120, the wind speed of the airflow passing through the first portion 110 of the indoor heat exchanger 100 can be slowed down. , the wind speed in the air passage after passing through the indoor unit heat exchanger 100 can be made slower on the upper side than on the lower side. Therefore, even if the distance L1 from the outer peripheral edge of the first portion 110 of the indoor heat exchanger 100 to the wall surface of the casing 11 is reduced, the effect of the increase in airflow resistance can be further reduced.
  • the change in ventilation resistance caused by moving the first portion 110 of the indoor heat exchanger 100 away from the centrifugal fan 40 and bringing it closer to the wall surface of the casing 11 can be achieved by increasing the ventilation area of the indoor heat exchanger 100.
  • the beneficial effect will outweigh the effect of increased airflow resistance after passing through the indoor unit heat exchanger 100 . Therefore, from a comprehensive point of view, while suppressing an increase in pressure loss when passing through the indoor heat exchanger 100, the ventilation resistance in the air passage to the outlet 14 after passing through the indoor heat exchanger 100 is reduced. can.
  • the present disclosure can be used for an indoor unit having a centrifugal fan and a heat exchanger provided on the outer peripheral side of the centrifugal fan in a casing, and an air conditioner equipped with the same.

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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

La présente invention concerne une unité intérieure qui permet de supprimer une augmentation de perte de pression lors du passage à travers un échangeur de chaleur tout en réduisant la résistance à la ventilation dans un trajet d'écoulement d'air jusqu'à une sortie après le passage à travers l'échangeur de chaleur. À cet effet, un échangeur de chaleur de l'unité intérieure présente une première partie et une seconde partie disposée au-dessous de la première partie. Dans une section transversale parallèle à l'axe de rotation d'un ventilateur centrifuge à un emplacement où l'extrémité périphérique externe du ventilateur centrifuge et l'extrémité périphérique interne de l'échangeur de chaleur sont les plus proches l'une de l'autre, les extrémités périphériques internes de la première partie et de la seconde partie sont disposées parallèlement à l'axe de rotation, et l'extrémité périphérique interne de la première partie est disposée davantage vers le côté périphérique externe que ne l'est l'extrémité périphérique interne de la seconde partie. Dans ladite section transversale, la distance horizontale L1 de l'extrémité périphérique externe de la première partie à une surface de paroi d'un carter est inférieure à la distance horizontale L2 de l'extrémité périphérique externe du ventilateur centrifuge à l'extrémité périphérique interne de la première partie, et la distance horizontale L3 de l'extrémité périphérique externe de la seconde partie à la surface de paroi du carter est supérieure à la distance horizontale L4 de l'extrémité périphérique externe du ventilateur centrifuge à l'extrémité périphérique interne de la seconde partie.
PCT/JP2022/004932 2022-02-08 2022-02-08 Unité intérieure et dispositif de climatisation la comprenant WO2023152802A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10176861A (ja) * 1996-12-16 1998-06-30 Mitsubishi Heavy Ind Ltd 空気調和機
JP2000088476A (ja) * 1998-09-16 2000-03-31 Daikin Ind Ltd 熱交換器
JP2009281215A (ja) * 2008-05-21 2009-12-03 Daikin Ind Ltd 空気調和機用室内機
JP2018025354A (ja) * 2016-08-10 2018-02-15 日立ジョンソンコントロールズ空調株式会社 室内機および空気調和機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10176861A (ja) * 1996-12-16 1998-06-30 Mitsubishi Heavy Ind Ltd 空気調和機
JP2000088476A (ja) * 1998-09-16 2000-03-31 Daikin Ind Ltd 熱交換器
JP2009281215A (ja) * 2008-05-21 2009-12-03 Daikin Ind Ltd 空気調和機用室内機
JP2018025354A (ja) * 2016-08-10 2018-02-15 日立ジョンソンコントロールズ空調株式会社 室内機および空気調和機

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