US20240392979A1 - Outdoor unit of refrigeration cycle apparatus - Google Patents

Outdoor unit of refrigeration cycle apparatus Download PDF

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Publication number
US20240392979A1
US20240392979A1 US18/684,031 US202118684031A US2024392979A1 US 20240392979 A1 US20240392979 A1 US 20240392979A1 US 202118684031 A US202118684031 A US 202118684031A US 2024392979 A1 US2024392979 A1 US 2024392979A1
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US
United States
Prior art keywords
blower
outdoor unit
impeller
housing
refrigeration cycle
Prior art date
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Pending
Application number
US18/684,031
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English (en)
Inventor
Takuya Teramoto
Hiroyasu Hayashi
Ryoji Abe
Kohei Kasai
Koji Yamaguchi
Kazuya Okada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKADA, KAZUYA, TERAMOTO, TAKUYA, KASAI, KOHEI, ABE, RYOJI, HAYASHI, HIROYASU, YAMAGUCHI, KOJI
Publication of US20240392979A1 publication Critical patent/US20240392979A1/en
Pending legal-status Critical Current

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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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40—Vibration or noise prevention at outdoor units
    • 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
    • F24F13/30—Arrangement or mounting of 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
    • F24F1/0018—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
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans

Definitions

  • the present disclosure relates to an outdoor unit of refrigeration cycle apparatus.
  • An outside unit of air conditioner in which an air heat exchanger and a blower are provided, has been known as using a centrifugal blower (sirocco fan) as the blower, and providing air inlets on at least a back side of a housing, while providing air outlets on any of a right side, a left side, or a top side of the housing, or on both the left and right sides of the housing (see, for example, PTL 1).
  • a centrifugal blower sino fan
  • An outdoor unit of refrigeration cycle apparatus includes a housing in which a machine chamber and a blower chamber are formed, the blower chamber being partitioned from the machine chamber, the machine housing a compressor inside, the blower chamber housing a heat exchanger and a blower inside, the blower being located on a secondary side of the heat exchanger, wherein the blower is a double inlet centrifugal blower including: an impeller having a plurality of blades arranged in a circumferential direction around a rotation axis, and a scroll casing having a discharge port and two bellmouths which serve as suction ports, the scroll casing housing the impeller inside, a plurality of the discharge ports are provided, the plurality of the discharge ports are located on an outlet placement surface, the outlet placement surface being a front or top surface of the housing, and a total width of the plurality of the discharge ports in a direction horizontal with the housing placed and parallel to the outlet placement surface is more than a width of the blower chamber in said direction.
  • the blower is a double
  • the outdoor unit of refrigeration cycle apparatus achieves such effects that even when a static pressure external to the outdoor unit is high, the outdoor unit can still obtain a large airflow volume, and can therefore achieve a low noise level and a low input, while preventing an increase in size of the outdoor unit.
  • FIG. 1 is a front view of an outdoor unit of refrigeration cycle apparatus according to First Embodiment with a front panel removed from the outdoor unit.
  • FIG. 4 is a front view of the outdoor unit of refrigeration cycle apparatus according to First Embodiment.
  • FIG. 5 is a front view of the outdoor unit of refrigeration cycle apparatus according to First Embodiment.
  • FIG. 7 is a cross-sectional view of the blower included in the outdoor unit according to First Embodiment.
  • FIG. 8 is a plan view of the impeller of the blower included in the outdoor unit according to First Embodiment.
  • FIG. 10 is a perspective view of the impeller of the blower included in the outdoor unit according to First Embodiment.
  • FIG. 12 is a top view illustrating still another example of the outdoor unit of refrigeration cycle apparatus according to First Embodiment.
  • FIG. 13 is a top view illustrating still another example of the outdoor unit of refrigeration cycle apparatus according to First Embodiment.
  • FIG. 14 is a top view illustrating still another example of the outdoor unit of refrigeration cycle apparatus according to First Embodiment with a top panel removed from the outdoor unit.
  • FIG. 16 is a front view of an outdoor unit of refrigeration cycle apparatus according to Second Embodiment with a front panel removed from the outdoor unit.
  • FIG. 17 is a cross-sectional view of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment.
  • FIG. 19 is a front view of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment.
  • FIG. 21 is a front view illustrating a first other example of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment with the front removed from the outdoor unit.
  • FIG. 22 is a front view illustrating a second other example of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment with the front panel removed from the outdoor unit.
  • FIG. 23 is a cross-sectional view illustrating the second other example of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment.
  • FIG. 24 is a front view illustrating the second other example of the outdoor unit of refrigeration cycle apparatus according to Second Embodiment.
  • a machine chamber 2 and a blower chamber 3 are formed in the housing 1 .
  • the machine chamber 2 is located on one of the left and right sides of the housing 1 .
  • the blower chamber 3 is located on the other of the left and right sides of the housing 1 .
  • the machine chamber 2 and the blower chamber 3 are partitioned from each other.
  • the machine chamber 2 houses a compressor, an electrical component box, and the like (not illustrated) inside.
  • the blower chamber 3 houses a heat exchanger 4 and blowers 100 inside.
  • the impeller 200 is a centrifugal fan configured to generate airflow in the blower 100 . As illustrated in FIG. 2 and other drawings, the impeller 200 is housed inside the scroll casing 110 . The impeller 200 is rotatable about a rotation axis inside the scroll casing 110 . As illustrated in FIG. 6 , the impeller 200 has a plurality of blades 210 . The plurality of blades 210 of the impeller 200 are arranged in a circumferential direction around the rotation axis of the impeller 200 .
  • the peripheral wall of the scroll casing 110 guides the airflow generated by the impeller 200 along its curved wall surface to the discharge port 112 .
  • the peripheral wall is provided between the side walls opposite to each other.
  • the peripheral wall is located parallel to the direction along the rotation axis of the impeller 200 .
  • the peripheral wall may be inclined relative to the direction along the rotation axis of the impeller 200 , and is not limited to the configuration in which the peripheral wall is located parallel to the direction along the rotation axis.
  • the peripheral wall of the scroll casing 110 is formed into a curved surface having an involute shape when viewed from a direction parallel to the rotation axis of the impeller 200 .
  • the involute shape is formed based on, for example, a logarithmic spiral, an Archimedean spiral, or an involute curve. Due to this shape, the air delivered from the impeller 200 smoothly flows through the gap between the impeller 200 and the peripheral wall in the direction toward the discharge port 112 . This allows the static pressure of air in the scroll casing to 110 efficiently increase more toward the discharge port 112 .
  • the outdoor-unit air outlets 11 are formed on the front panel 10 provided on the front surface of the housing 1 .
  • the outdoor-unit air outlets 11 are provided equal to the number of the discharge ports 112 . That is, in the configuration example described here, three outdoor-unit air outlets 11 are formed on the front panel 10 .
  • the position and size of the outdoor-unit air outlets 11 are adjusted to match the position and size of their corresponding discharge ports 112 . That is, when the front panel 10 is properly attached to the housing 1 , the discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 .
  • the rotation axis of the blower 100 since the rotation axis of the blower 100 is positioned along the up-down direction, the direction horizontal with the housing 1 placed can be rephrased as a direction perpendicular to the rotation axis of the blower 100 . Therefore, as for the width of the discharge port 112 and the width of the blower chamber 3 , in other words, the total width of the discharge ports 112 in the direction perpendicular to the rotation axis of the blower 100 and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the rotation axis of the blower 100 is positioned along the up-down direction. That is, the rotation axis of the impeller 200 is positioned parallel to the outlet placement surface described above.
  • the impeller 200 it is preferable for the impeller 200 to have a fan diameter larger than a half of a width of the blower chamber 3 in a direction perpendicular to the outlet placement surface, that is, in a front-rear direction. Having the fan diameter as described above can further increase the airflow volume, and consequently makes it possible to achieve an even lower noise level and an even lower input.
  • the blowers 100 are double inlet centrifugal blowers.
  • Each of the blowers 100 includes the impeller 200 that is a centrifugal fan.
  • the impeller 200 includes a main plate portion 201 , side plate portions 203 , and a plurality of blades 210 .
  • Each of the blades 210 is connected at one end to the main plate portion 201 , while being connected at the other end to the side plate portion 203 . That is, each of the plurality of blades 210 is located between the main plate portion 201 and the side plate portion 203 .
  • the plurality of blades 210 are spaced apart from each other at regular intervals in the circumferential direction of the main plate portion 201 .
  • the side plate portions 203 are annular members. Each of the side plate portions 203 is fixed to outer circumferential-side end portions of the plurality of blades 210 on the side opposite to the main plate portion 201 .
  • the side plate portions 203 are provided on opposite sides with respect to the plate surface of the main plate portion 201 .
  • the side plate portion 203 connects the plurality of blades 210 , thereby to maintain the positional relationship between the tip ends of the blades 210 and reinforce the plurality of blades 210 .
  • the impeller 200 is rotationally driven about the rotation axis by driving of the motor 101 .
  • gas external to the blower 100 is suctioned from the suction ports formed in the bellmouths of the scroll casing 110 .
  • the air suctioned into the space surrounded by the main plate portion 201 and the plurality of blades 210 passes through the spaces between the adjacent blades 210 , and is delivered outward in the radial direction of the impeller 200 .
  • the outlet angle is an angle formed between the center line of the blade 210 and the tangent of an outer diameter circle of the impeller 200 at the intersection of the outer diameter circle of the impeller 200 and the center line of the blade 210 .
  • the boundary between the turbo blade portion 211 and the sirocco blade portion 212 is illustrated by the dotted line in FIG. 8 .
  • the sirocco blade portion 212 is not necessarily provided. However, the airflow volume of the blower 100 can be increased by providing the sirocco blade portion 212 .
  • each of the plurality of blades 210 is formed such that on the inner circumferential side relative to an inner circumferential end portion 204 , the height of the blade 210 from the plate surface of the main plate portion 201 is reduced more toward the inner circumferential side.
  • the turbo blade portion 211 includes the inner circumferential end portion 204 . Note that the position of the inner circumferential end portion 204 is illustrated by the dot-and-dash line in FIG. 8 .
  • the turbo blade portion 211 when the blower 100 is viewed from a direction parallel to the rotation axis of the blower 100 , the turbo blade portion 211 is exposed from the suction port of the blower 100 . With this configuration, the turbo blade portion 211 helps improve the pressure recovery performance of the blower 100 . This makes it possible to achieve an even lower input.
  • the heat exchanger 4 is not limited to having an L-shape in top view. Other than the L-shape, as illustrated in FIG. 11 , the heat exchanger 4 may have, for example, a U-shape or C-shape in top view. For another example, a plate heat exchanger 4 may be used.
  • a protruding portion 113 is provided protruding toward the heat exchanger 4 . Therefore, a distance C between the heat exchanger 4 and the location in the scroll casing 110 near the main plate portion 201 of the impeller 200 , that is, the protruding portion 113 is shorter than a distance D between the heat exchanger 4 and a location in the scroll casing 110 near the side plate portions 203 of the impeller 200 .
  • the airflow having passed through the heat exchanger 4 is smoothly guided from the location near the main plate portion 201 of the impeller 200 to the location near the side plate portions 203 of the impeller 200 along the outer shape of the scroll casing 110 , and then flows into the suction ports formed in the bellmouths on the scroll casing 110 . Consequently, an inflow ability of the airflow from the heat exchanger 4 to the blower 100 can be improved to reduce the pressure loss, and an even lower input can be achieved. It is preferable that the tip end of the protruding portion 113 of the scroll casing 110 is formed into an arc shape. This allows the airflow having passed through the heat exchanger 4 to be more smoothly guided, and makes it possible to further improve the inflow ability of the airflow from the heat exchanger 4 to the blower 100 .
  • the outlet placement surface is the front surface of the housing 1 .
  • the outlet placement surface is not limited to being the front surface of the housing 1 , but may be any surface of the housing 1 .
  • FIGS. 12 to 15 illustrate a configuration example when the outlet placement surface is the top surface of the housing 1 .
  • a top panel 20 is provided on the top surface of a portion of the housing 1 where the blower chamber 3 is located.
  • the outdoor-unit air outlets 11 are formed on the top panel 20 .
  • the outdoor-unit air outlets 11 may be provided with the grid-like grilles 12 .
  • the grilles 12 may be attached to the top panel 20 , or may be provided integrally with the top panel 20 .
  • the outdoor-unit air outlets 11 are provided equal to the number of the discharge ports 112 .
  • three blowers 100 are provided in the blower chamber 3 , each of which has one discharge port 112 .
  • the outdoor unit has a total of three discharge ports 112 in its entirety. Therefore, on the top panel 20 , three outdoor-unit air outlets 11 are formed. The position and size of the outdoor-unit air outlets 11 are adjusted to match the position and size of their corresponding discharge ports 112 . That is, when the top panel 20 is properly attached to the housing 1 , the discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 .
  • the plurality of discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 on the top panel 20 .
  • the top surface of the housing, on which the top panel 20 is provided is the outlet placement surface.
  • the plurality of discharge ports 112 are located on this outlet placement surface.
  • the suction ports of each of the blowers 100 are located facing the directions toward the front surface and the back surface of the housing 1 . That is, the rotation axis of the blower 100 is positioned along the front-rear direction.
  • a total width of the plurality of discharge ports 112 in a direction horizontal with the housing 1 placed and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the direction horizontal with the housing 1 placed and parallel to the outlet placement surface includes at least the left-right direction. Therefore, even in this example, in other words, the total width of the discharge ports 112 in a direction perpendicular to the rotation axis of the blower 100 and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction. Even in the configuration example as described above, it is still possible to obtain a large airflow volume even when a static pressure external to the outdoor unit is high, and therefore achieve a low noise level and a low input without increasing the size of the outdoor unit.
  • FIG. 16 is a front view of an outdoor unit of refrigeration cycle apparatus with a front panel removed from the outdoor unit.
  • FIG. 17 is a cross-sectional view of the outdoor unit of refrigeration cycle apparatus.
  • FIGS. 18 and 19 are front views of the outdoor unit of refrigeration cycle apparatus.
  • FIG. 20 is a front view illustrating a modification of the outdoor unit of refrigeration cycle apparatus with the front panel removed from the outdoor unit.
  • FIG. 21 is a front view illustrating a first other example of the outdoor unit of refrigeration cycle apparatus with the front panel removed from the outdoor unit.
  • FIG. 22 is a front view illustrating a second other example of the outdoor unit of refrigeration cycle apparatus with the front panel removed from the outdoor unit.
  • FIG. 23 is a cross-sectional view illustrating the second other example of the outdoor unit of refrigeration cycle apparatus.
  • FIGS. 24 and 25 are front views illustrating the second other example of the outdoor unit of refrigeration cycle apparatus.
  • FIG. 26 is a front view illustrating a modification of the outdoor unit of refrigeration cycle apparatus with the front panel removed from the outdoor unit.
  • FIG. 27 is a front view illustrating the modification of the outdoor unit of refrigeration cycle apparatus.
  • FIG. 28 is a perspective view of a blower included in the modification of the outdoor unit of refrigeration cycle apparatus.
  • FIG. 29 is a cross-sectional view of the blower included in the modification of the outdoor unit of refrigeration cycle apparatus.
  • each blower of the outdoor unit is provided with one discharge port.
  • two or more discharge ports are provided to one blower.
  • the outdoor unit of refrigeration cycle apparatus according to the second embodiment is described mainly focusing on differences from the first embodiment. Basically, descriptions of the same components as those in the first embodiment are omitted. In the descriptions below, the same or corresponding components as or to those in the first embodiment are basically denoted by the same reference signs as those used in the descriptions of the first embodiment.
  • two blowers 100 are provided in the blower chamber 3 as illustrated in FIGS. 16 and 17 .
  • Two discharge ports 112 are formed on each of the scroll casings 110 of the blowers 100 .
  • each of the two blowers 100 has two discharge ports 112 .
  • the outdoor unit has a total of four discharge ports 112 in its entirety.
  • the front panel 10 is provided on the front surface of a portion of the housing 1 where the blower chamber 3 is located.
  • the outdoor-unit air outlets 11 are formed on the front panel 10 . Note that as illustrated in FIG. 19 , the outdoor-unit air outlets 11 may be provided with the grid-like grilles 12 .
  • the outdoor-unit air outlets 11 are provided equal to the number of the discharge ports 112 .
  • the outdoor unit has a total of four discharge ports 112 in its entirety. Therefore, on the front panel 10 , four outdoor-unit air outlets 11 are formed. The position and size of the outdoor-unit air outlets 11 are adjusted to match the position and size of their corresponding discharge ports 112 . That is, when the front panel 10 is properly attached to the housing 1 , the discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 .
  • the plurality of discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 on the front panel 10 .
  • the front surface of the housing, on which the front panel 10 is provided is the outlet placement surface.
  • the plurality of discharge ports 112 are located on this outlet placement surface.
  • the suction ports of each of the blowers 100 are located facing directions toward opposite left and right lateral surfaces of the housing 1 . That is, the rotation axis of the blower 100 is positioned along the left-right direction.
  • a total width of the discharge ports 112 in a direction horizontal with the housing 1 placed and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the direction horizontal with the housing 1 placed and parallel to the outlet placement surface is the left-right direction.
  • the blower chamber 3 may be provided on the upper side of the housing 1
  • the machine chamber 2 may be provided on the lower side of the housing 1 .
  • the suction ports of the blower 100 are oriented in directions toward opposite left and right lateral surfaces of the housing 1 , so that air can be efficiently suctioned particularly from the outdoor-unit air inlets 5 provided on the lateral surface of the housing 1 . This makes it possible to increase the airflow volume and improve heat exchange efficiency.
  • the rotation axis of the blower 100 is positioned along the left-right direction. That is, the rotation axis of the impeller 200 is positioned parallel to the outlet placement surface described above.
  • the impeller 200 it is preferable for the impeller 200 to have a fan diameter larger than a half of a width of the blower chamber 3 in a direction perpendicular to the outlet placement surface, that is, in the front-rear direction. Having the fan diameter as described above can further increase the airflow volume, and consequently makes it possible to achieve an even lower noise level and an even lower input.
  • FIG. 21 illustrates a first other configuration example of the outdoor unit of refrigeration cycle apparatus according to the present embodiment.
  • two blowers 100 are provided in the blower chamber 3 and arranged one above the other in the up-down direction.
  • FIG. 21 only one of the two blowers 100 is illustrated.
  • Two discharge ports 112 are formed on each of the scroll casings 110 of the blowers 100 .
  • each of the two blowers 100 has two discharge ports 112 .
  • the outdoor unit has a total of four discharge ports 112 in its entirety.
  • the plurality of discharge ports 112 are located in their corresponding outdoor-unit air outlets formed on the front panel (not illustrated).
  • the front surface of the housing, on which the front panel is provided is the outlet placement surface.
  • the plurality of discharge ports 112 are located on this outlet placement surface.
  • the suction ports of each of the blowers 100 are located facing the directions toward the top surface and the bottom surface of the housing 1 . That is, the rotation axis of the blower 100 is positioned along the up-down direction.
  • a total width of the discharge ports 112 in a direction horizontal with the housing 1 placed and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the direction horizontal with the housing 1 placed and parallel to the outlet placement surface is the left-right direction.
  • FIGS. 22 to 25 illustrate a second other configuration example of the outdoor unit of refrigeration cycle apparatus according to the present embodiment.
  • one blower 100 is provided in the blower chamber 3 .
  • Two discharge ports 112 are formed on the scroll casing 110 of the blower 100 .
  • one blower 100 has two discharge ports 112 .
  • the outdoor unit has a total of two discharge ports 112 in its entirety.
  • the front panel 10 is provided on the front surface of a portion of the housing 1 where the blower chamber 3 is located.
  • the outdoor-unit air outlets 11 are formed on the front panel 10 . Note that as illustrated in FIG. 25 , the outdoor-unit air outlets 11 may be provided with the grid-like grilles 12 .
  • the outdoor-unit air outlets 11 are provided equal to the number of the discharge ports 112 .
  • the outdoor unit has a total of two discharge ports 112 in its entirety. Therefore, on the front panel 10 , two outdoor-unit air outlets 11 are formed. The position and size of the outdoor-unit air outlets 11 are adjusted to match the position and size of their corresponding discharge ports 112 . That is, when the front panel 10 is properly attached to the housing 1 , the discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 .
  • the plurality of discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 on the front panel 10 .
  • the front surface of the housing, on which the front panel 10 is provided is the outlet placement surface.
  • the plurality of discharge ports 112 are located on this outlet placement surface.
  • the suction ports of each of the blowers 100 are located facing the directions toward the front surface and the back surface of the housing 1 . That is, the rotation axis of the blower 100 is positioned along the front-rear direction.
  • a total width of the discharge ports 112 in a direction horizontal with the housing 1 placed and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the direction horizontal with the housing 1 placed and parallel to the outlet placement surface is the left-right direction.
  • the suction port of the blower 100 is oriented in the direction toward the back surface of the housing 1 , so that air can be efficiently suctioned particularly from the outdoor-unit air inlets 5 provided on the back surface of the housing 1 . This makes it possible to increase the airflow volume and improve heat exchange efficiency.
  • FIGS. 26 to 29 illustrate a modification of the second other configuration example of the outdoor unit of refrigeration cycle apparatus according to the present embodiment.
  • two or more discharge ports 112 for one blower 100 are arranged radially when viewed from the front side of the housing 1 .
  • six discharge ports 112 are provided to one blower 100 .
  • Each of the discharge ports 112 has, on its inner circumferential side, a shape of an arc of the circle centered at the rotation axis of the blower 100 .
  • each of the discharge ports 112 has, on its inner circumferential side, an arc shape made up of a portion of a circle concentric to the suction port of the blower 100 .
  • Each of the discharge ports 112 has, on its outer circumferential side, an arcuate shape made up of a portion of an ellipse centered at the rotation axis of the blower 100 .
  • the outdoor-unit air outlets 11 are provided equal to the number of the discharge ports 112 .
  • the outdoor unit has a total of six discharge ports 112 in its entirety. Therefore, on the front panel 10 , six outdoor-unit air outlets 11 are formed. The position and size of the outdoor-unit air outlets 11 are adjusted to match the position and size of their corresponding discharge ports 112 . That is, when the front panel 10 is properly attached to the housing 1 , the discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 .
  • the plurality of discharge ports 112 are located in their corresponding outdoor-unit air outlets 11 on the front panel 10 .
  • the front surface of the housing, on which the front panel 10 is provided is the outlet placement surface.
  • the plurality of discharge ports 112 are located on this outlet placement surface.
  • the suction ports of each blower 100 are located facing the directions toward the front surface and the back surface of the housing 1 . That is, the rotation axis of the blower 100 is positioned along the front-rear direction.
  • a total width of the discharge ports 112 in a direction horizontal with the housing 1 placed and parallel to the outlet placement surface is more than the width of the blower chamber 3 in the said direction.
  • the direction horizontal with the housing 1 placed and parallel to the outlet placement surface is the left-right direction.
  • the suction port of the blower 100 is oriented in the direction toward the back surface of the housing 1 , so that air can be efficiently suctioned particularly from the outdoor-unit air inlets 5 provided on the back surface of the housing 1 . This makes it possible to increase the airflow volume and improve heat exchange efficiency.
  • the discharge ports 112 of the blower 100 are arranged radially, so that air can be suctioned into the suction port evenly from the spaces between the discharge ports 112 , and can be delivered from many discharge ports 112 . Consequently, a further increase in the airflow volume can be achieved.
  • the present disclosure is applicable to an outdoor unit of refrigeration cycle apparatus, in which the outdoor unit includes a double inlet centrifugal blower in a blower chamber of a housing.

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
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PCT/JP2021/039323 WO2023073768A1 (ja) 2021-10-25 2021-10-25 冷凍サイクル装置の室外機

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EP (1) EP4425060A4 (https=)
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Citations (5)

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