WO2023073768A1 - 冷凍サイクル装置の室外機 - Google Patents

冷凍サイクル装置の室外機 Download PDF

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Publication number
WO2023073768A1
WO2023073768A1 PCT/JP2021/039323 JP2021039323W WO2023073768A1 WO 2023073768 A1 WO2023073768 A1 WO 2023073768A1 JP 2021039323 W JP2021039323 W JP 2021039323W WO 2023073768 A1 WO2023073768 A1 WO 2023073768A1
Authority
WO
WIPO (PCT)
Prior art keywords
outdoor unit
blower
housing
impeller
refrigeration cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/039323
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
拓矢 寺本
弘恭 林
亮志 阿部
浩平 葛西
幸治 山口
和也 岡田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2021/039323 priority Critical patent/WO2023073768A1/ja
Priority to JP2023555896A priority patent/JP7613606B2/ja
Priority to US18/684,031 priority patent/US20240392979A1/en
Priority to EP21962318.8A priority patent/EP4425060A4/en
Priority to CN202180103225.8A priority patent/CN118103637A/zh
Priority to TW111130219A priority patent/TWI840912B/zh
Publication of WO2023073768A1 publication Critical patent/WO2023073768A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • 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 a refrigeration cycle device.
  • the fan is a centrifugal fan (sirocco fan)
  • the air inlet is at least on the back side of the housing
  • the air outlet is on the right side and left side of the housing.
  • There is known one provided on one of the surface, the left and right side surfaces, and the top surface see, for example, Patent Document 1).
  • the size of the air outlet of the centrifugal blower is smaller than the size of the housing of the outdoor unit, particularly the size of the air heat exchanger.
  • the air volume is smaller than that of an outdoor unit of the same size equipped with a conventional propeller fan. Therefore, it is difficult to obtain a sufficient amount of air, particularly when the static pressure outside the outdoor unit is high. In addition, the air volume becomes small and it is difficult to recover the pressure sufficiently, which causes an increase in noise and a deterioration in input power.
  • This disclosure has been made to solve such problems.
  • the purpose is to suppress the increase in the size of the outdoor unit, to obtain a high air volume even when the static pressure outside the outdoor unit is high, and to achieve low noise and low input.
  • the outdoor unit of the refrigeration cycle apparatus includes a machine room in which a compressor is housed, a heat exchanger separated from the machine room, and a blower arranged on the secondary side of the heat exchanger.
  • the blower includes an impeller having a plurality of blades arranged in a circumferential direction around the rotation axis, two bell mouths serving as suction ports, and a discharge port. and a scroll casing in which the impeller is arranged, and a plurality of the discharge ports are present, and the plurality of discharge ports are connected to the discharge port of the casing.
  • the sum of the widths of the outlets in a direction arranged on the outlet arrangement surface, parallel to the outlet arrangement surface, and horizontal with the housing installed is greater than the width of the blower chamber in the direction.
  • the outdoor unit of the refrigeration cycle apparatus it is possible to obtain a high air volume even when the static pressure outside the outdoor unit is high while suppressing an increase in size, which in turn reduces noise.
  • the effect is that the input can be reduced.
  • FIG. 2 is a front view of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1 with the front panel removed;
  • FIG. FIG. 2 is a perspective top view of the essential parts of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • Fig. 2 is a perspective side view of the main part of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • 2 is a front view of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 2 is a front view of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 3 is a plan view of an impeller of a blower included in the outdoor unit according to Embodiment 1.
  • FIG. 3 is a cross-sectional view of a blower included in the outdoor unit according to Embodiment 1; 3 is a plan view of an impeller of a blower included in the outdoor unit according to Embodiment 1.
  • FIG. FIG. 3 is a cross-sectional view of the impeller of the blower included in the outdoor unit according to Embodiment 1; 3 is a perspective view of an impeller of a blower included in the outdoor unit according to Embodiment 1.
  • FIG. FIG. 7 is a perspective top view of a main part showing another example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 5 is a top view showing another example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 5 is a top view showing another example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 6 is a top view of another example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1, with the top panel removed;
  • FIG. 7 is a perspective front view of a main part showing another example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 1;
  • FIG. 8 is a front view of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2 with the front panel removed;
  • FIG. 7 is a cross-sectional view of an outdoor unit of a refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 8 is a front view of an outdoor unit of a refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 8 is a front view of an outdoor unit of a refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 11 is a front view of a modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2, with the front panel removed;
  • FIG. 11 is a front view of a state in which a front panel is removed, showing a first modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 11 is a front view of the second example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2, with the front panel removed;
  • FIG. 9 is a cross-sectional view showing a second modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 8 is a front view showing a second modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 8 is a front view showing a second modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 11 is a front view of a modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2, with the front panel removed;
  • FIG. 8 is a front view showing a modification of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 11 is a perspective view of a blower included in a modified example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 9 is a cross-sectional view of a blower included in a modified example of the outdoor unit of the refrigeration cycle apparatus according to Embodiment 2;
  • FIG. 1 is a front view of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 2 is a perspective top view of the essential parts of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 3 is a perspective side view of the essential parts of the outdoor unit of the refrigeration cycle apparatus.
  • 4 and 5 are front views of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 6 is a plan view of an impeller of a blower provided in the outdoor unit.
  • FIG. 7 is a cross-sectional view of a fan included in the outdoor unit.
  • FIG. 8 is a plan view of an impeller of a blower provided in the outdoor unit.
  • FIG. 1 is a front view of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 2 is a perspective top view of the essential parts of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 3 is a perspective side view of the essential parts of the outdoor unit of the refrigeration cycle apparatus.
  • 4 and 5 are front views of the outdoor unit of the refrigeration
  • FIG. 9 is a cross-sectional view of an impeller of a blower provided in the outdoor unit.
  • FIG. 10 is a perspective view of an impeller of a blower provided in the outdoor unit.
  • FIG. 11 is a perspective top view of essential parts showing another example of the outdoor unit of the refrigeration cycle apparatus.
  • 12 and 13 are top views showing another example of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 14 is a top view of another example of the outdoor unit of the refrigeration cycle apparatus with the top panel removed.
  • FIG. 15 is a perspective front view of essential parts showing another example of the outdoor unit of the refrigeration cycle apparatus.
  • a refrigeration cycle apparatus includes an indoor unit and an outdoor unit.
  • a heat exchanger is provided in each of the indoor unit and the outdoor unit.
  • the heat exchanger of the indoor unit and the heat exchanger of the outdoor unit are connected by refrigerant pipes provided in a circulating manner.
  • the refrigerant flowing in the refrigerant pipe circulates between the heat exchanger of the indoor unit and the heat exchanger of the outdoor unit, thereby the heat exchanger of the indoor unit and the heat exchanger of the outdoor unit. It works as a heat pump to transfer heat between them.
  • the outdoor unit of the refrigeration cycle apparatus includes a housing 1, as shown in FIGS.
  • the housing 1 has, for example, a rectangular parallelepiped outer shape. That is, in the illustrated configuration, the housing 1 has a front surface, a rear surface, a top surface, a bottom surface, and left and right side surfaces.
  • a machine room 2 and a fan room 3 are formed in the housing 1 .
  • the machine room 2 is arranged on one of the left and right sides of the housing 1 .
  • the blower chamber 3 is arranged on the other left and right sides of the housing 1 .
  • the machine room 2 and the fan room 3 are partitioned. Inside the machine room 2, a compressor and an electric component box (not shown) are accommodated.
  • a heat exchanger 4 and a blower 100 are housed inside the blower chamber 3 .
  • outdoor unit suction ports 5 are formed on the side and back of the portion of the housing 1 where the blower chamber 3 is arranged.
  • a front panel 10 is provided in front of the portion of the housing 1 where the blower chamber 3 is arranged.
  • An outdoor unit outlet 11 is formed in the front panel 10 .
  • the inside of the blower room 3 forms an air passage leading from the outdoor unit inlet 5 to the outdoor unit outlet 11 .
  • a grid-like grill 12 may be provided at the outdoor unit outlet 11 .
  • the grille 12 may be attached to the front panel 10 or may be provided integrally with the front panel 10 .
  • the heat exchanger 4 is arranged in an L shape in a top view from the side surface of the housing 1 where the outdoor unit suction port 5 is located to the rear surface in the fan chamber 3 .
  • the blower 100 is arranged downstream of the heat exchanger 4 in the air passage inside the blower room 3 . In other words, the blower 100 is arranged on the secondary side of the heat exchanger 4 .
  • blower room 3 As shown in FIGS. 1 and 3 to 5, in the configuration example described here, three blowers 100 are provided in the blower room 3.
  • FIG. In this configuration example, three blowers 100 are arranged side by side in the vertical direction.
  • Each blower 100 is a so-called double suction type centrifugal blower.
  • Air blower 100 includes impeller 200 , scroll casing 110 , motor 101 and shaft 102 .
  • the impeller 200 is a centrifugal fan for generating the airflow of the blower 100. As shown in FIG. 2 and the like, the impeller 200 is arranged inside the scroll casing 110 . Impeller 200 is rotatable about a rotation axis inside scroll casing 110 . As shown in FIG. 6, impeller 200 has a plurality of blades 210 . A plurality of blades 210 of impeller 200 are arranged in a circumferential direction around the rotation axis of impeller 200 .
  • the scroll casing 110 rectifies the air blown out from the impeller 200.
  • Scroll casing 110 has two side walls and a peripheral wall.
  • the side walls of scroll casing 110 are provided on both sides of impeller 200 in the rotational axis direction of impeller 200 .
  • a peripheral wall of scroll casing 110 is provided so as to surround impeller 200 from the radially outer side of impeller 200 .
  • the two side walls are arranged to face each other via the peripheral wall.
  • the scroll casing 110 has two bell mouths 111 formed therein.
  • Two bell mouths 111 of the scroll casing 110 serve as suction ports for the blower 100 .
  • the bellmouth 111 is provided on each of two side walls of the scroll casing 110 .
  • the suction port formed by the bell mouth 111 has a circular shape around the rotation axis of the impeller 200 .
  • the shape of the suction port is not limited to a circular shape, and may be other shapes such as an elliptical shape.
  • the bellmouth 111 rectifies the gas sucked into the impeller 200 and causes it to flow into the suction port of the impeller 200 .
  • the bell mouth 111 is formed such that the diameter of the opening gradually decreases from the outside to the inside of the scroll casing 110 . As a result, the air in the vicinity of the suction port smoothly flows along the bell mouth 111 and efficiently flows into the impeller 200 from the suction port.
  • a discharge port 112 is formed in the scroll casing 110 .
  • the discharge port 112 is an opening through which the airflow in the scroll casing 110 generated by the impeller 200 is discharged.
  • the opening shape of the ejection port 112 is, for example, a rectangular shape. However, the opening shape of the ejection port 112 is not limited to a rectangular shape.
  • the opening surface of discharge port 112 is arranged parallel to the rotation axis of impeller 200 .
  • the peripheral wall of the scroll casing 110 guides the airflow generated by the impeller 200 to the discharge port 112 along the curved wall surface.
  • a peripheral wall is a wall provided between side walls facing each other.
  • the peripheral wall is, for example, arranged parallel to the rotation axis direction of the impeller 200 .
  • the peripheral wall may be inclined with respect to the rotation axis direction of the impeller 200, and is not limited to the configuration in which it is arranged in parallel with the rotation axis direction.
  • the peripheral wall of the scroll casing 110 is formed into a spiral-shaped curved surface when viewed from a direction parallel to the rotation axis of the impeller 200 .
  • the spiral shape includes, for example, a logarithmic spiral, an Archimedean spiral, or a spiral shape based on an involute curve.
  • the "rotating shaft of the impeller 200" may also be referred to as the "rotating shaft of the blower 100".
  • the fan 100 configured as described above is a double-intake centrifugal fan that sucks air from both ends of the rotating shaft of the fan 100 and blows air in a direction perpendicular to the rotating shaft of the fan 100.
  • the motor 101 and shaft 102 are shared. That is, in the configuration example described here, one motor 101 and one shaft 102 are provided for three blowers 100 .
  • the motor 101 is arranged outside the scroll casing 110 of each blower 100 .
  • the motor 101 is arranged above the three fans 100 arranged vertically.
  • Shaft 102 transmits the rotational driving force of motor 101 to each impeller 200 of each blower 100 .
  • Fans 100 are arranged such that the rotation shafts of impellers 200 of each fan 100 are aligned.
  • Shaft 102 is provided along the respective rotation axis of impeller 200 of each blower 100 .
  • the center of each impeller 200 of each blower 100 is fixed to the shaft 102 .
  • the front panel 10 provided on the front surface of the housing 1 is formed with the outdoor unit outlet 11 .
  • the outdoor unit outlets 11 are provided in the same number as the outlets 112 in accordance with the outlets 112 . That is, in the configuration example described here, the front panel 10 is formed with three outdoor unit outlets 11 .
  • the position and size of each outdoor unit outlet 11 are adjusted according to the position and size of each outlet 112 . That is, when the front panel 10 is properly attached to the housing 1 , the respective outlets 112 are arranged at the respective outdoor unit outlets 11 .
  • the plurality of outlets 112 are arranged at the outdoor unit outlet 11 of the front panel 10 .
  • the front surface of the housing on which the front panel 10 is provided is the outlet arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged so as to face the upper surface and the bottom surface of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the vertical direction.
  • the width of the outlet 112 and the width of the blower chamber 3 in other words, the total width of the outlet 112 in the direction perpendicular to the rotating shaft of the blower 100 and parallel to the surface on which the outlet is arranged is the same as the width of the blower chamber 3 greater than the width of
  • the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is the left-right direction. That is, the dimension A shown in FIG. 2 is the width of the ejection port 112 in a direction parallel to the ejection port arrangement surface and horizontal with the housing 1 installed.
  • the dimension B shown in the figure is the width of the blower chamber 3 in the horizontal direction parallel to the outlet arrangement surface and with the housing 1 installed.
  • dimensions A1, A2, and A3 shown in FIG. 1 are widths of the ejection port 112 in a direction parallel to the ejection port arrangement surface and horizontal with the housing 1 installed.
  • the dimension B shown in the figure is the width of the blower chamber 3 in the horizontal direction parallel to the outlet arrangement surface and with the housing 1 installed.
  • the total width of the plurality of outlets 112 is adjusted to be larger than the width of the fan chamber 3 . That is, for each dimension A1, A2, A3 and B, the relationship of the following formula (1) holds.
  • the outdoor unit of the refrigeration cycle apparatus configured as described above, even when the static pressure outside the outdoor unit is high, the size of the outdoor unit does not increase. It is possible to obtain a large air volume, and as a result, it is possible to achieve low noise and low input.
  • the rotation shaft of the blower 100 is arranged along the vertical direction. That is, the rotating shaft of the impeller 200 is arranged parallel to the above-described discharge port arrangement surface.
  • the fan diameter of the impeller 200 should be larger than half the width of the blower chamber 3 in the direction perpendicular to the discharge port arrangement surface, that is, in the front-rear direction. By doing so, the air volume can be further increased, and further reduction in noise and input can be achieved.
  • the fan 100 is a double-suction centrifugal fan.
  • the blower 100 has an impeller 200 which is a centrifugal fan.
  • the impeller 200 includes a main plate portion 201 , side plate portions 203 and a plurality of blades 210 .
  • the main plate portion 201 is a disk-shaped member.
  • a boss portion 202 is provided at the center of the main plate portion 201 .
  • a hole through which the shaft 102 is passed is formed in the center of the boss portion 202 .
  • the plurality of blades 210 are arranged radially in the circumferential direction of the main plate portion 201 at the peripheral portion of the main plate portion 201 . Blades 210 are provided on both plate surfaces of main plate portion 201 .
  • Each blade 210 has one end connected to the main plate portion 201 and the other end connected to the side plate portion 203 . That is, each of the blades 210 is arranged between the main plate portion 201 and the side plate portion 203 .
  • the plurality of blades 210 are arranged at regular intervals in the circumferential direction of the main plate portion 201 .
  • the side plate portion 203 is an annular member.
  • the side plate portion 203 is fixed to the end portion of the plurality of blades 210 on the side opposite to the main plate portion 201 and on the outer peripheral side.
  • the side plate portions 203 are provided on both plate surface sides of the main plate portion 201 respectively.
  • the impeller 200 is driven to rotate around the rotation axis by being driven by the motor 101 .
  • gas outside blower 100 is sucked through a suction port formed in a bell mouth of scroll casing 110 .
  • the air sucked into the space surrounded by the main plate portion 201 and the plurality of blades 210 passes through the space between the adjacent blades 210 and the impeller 200. It is delivered radially outward.
  • Each of the plurality of blades 210 of the impeller 200 has a turbo blade portion 211 and a sirocco blade portion 212 .
  • the turbo blade portion 211 is provided on the inner peripheral side of the sirocco blade portion 212 in the radial direction about the rotation axis of the impeller 200 .
  • the sirocco blade portion 212 is provided on the outer peripheral side of the turbo blade portion 211 in the radial direction about the rotation axis of the impeller 200 .
  • the turbo blade portion 211 constitutes a trailing blade having an exit angle of 90 degrees or less.
  • the sirocco wing 212 constitutes a forward vane with an exit angle greater than 90 degrees.
  • the outlet angle is the angle formed by the center line of the blade 210 and the tangent line of the 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 .
  • a boundary between the turbo blade portion 211 and the sirocco blade portion 212 is indicated by a dashed line in FIG.
  • Sirocco wings 212 may not necessarily be provided. However, by providing the sirocco blades 212, the air volume of the blower 100 can be increased.
  • each of the plurality of blades 210 is formed such that the height from the plate surface of the main plate portion 201 becomes lower toward the inner peripheral side from the inner peripheral end portion 204 toward the inner peripheral side. ing.
  • the turbo blade portion 211 includes this inner peripheral end portion 204 . Note that the position of the inner peripheral end portion 204 is indicated by a dashed line in FIG.
  • the turbo blade portion 211 is exposed from the suction port of the fan 100.
  • the pressure recovery performance of the blower 100 can be improved by the turbo blade portion 211, and further reduction of the input power can be achieved.
  • the shape of the heat exchanger 4 is not limited to an L shape when viewed from above.
  • the shape of the heat exchanger 4 may be U-shaped or C-shaped when viewed from above.
  • a flat plate-shaped heat exchanger 4 may also be used.
  • a projecting portion 113 projecting toward the heat exchanger 4 is provided at a portion of the scroll casing 110 near the main plate portion 201 of the impeller 200. is provided. Therefore, the distance C between the portion of the scroll casing 110 near the main plate portion 201 of the impeller 200 , that is, the protrusion 113 and the heat exchanger 4 is equal to the distance C between the portion of the scroll casing 110 near the side plate portion 203 of the impeller 200 and the heat exchanger 4 .
  • the airflow that has passed through the heat exchanger 4 is smoothly guided from a portion near the main plate portion 201 of the impeller 200 to a portion near the side plate portion 203 along the outer shape of the scroll casing 110. It flows into a suction port formed in the bell mouth of scroll casing 110 . Therefore, it is possible to improve the inflow of airflow from the heat exchanger 4 to the blower 100, reduce the pressure loss, and further reduce the input power.
  • the tip of the projecting portion 113 of the scroll casing 110 is preferably arc-shaped. By doing so, the airflow that has passed through the heat exchanger 4 can be guided more smoothly, and the inflow of the airflow from the heat exchanger 4 to the blower 100 can be further improved.
  • the discharge port arrangement surface was the front surface of the housing 1 .
  • the discharge port arrangement surface is not limited to the front surface of the housing 1 and may be any surface of the housing 1 .
  • FIGS. 12 to 15 show configuration examples in which the discharge port arrangement surface is the upper surface of the housing 1.
  • a top panel 20 is provided on the upper surface of the portion of the housing 1 where the blower chamber 3 is arranged.
  • An outdoor unit outlet 11 is formed in the top panel 20 .
  • a grid-like grill 12 may be provided at the outdoor unit outlet 11 .
  • the grille 12 may be attached to the top panel 20 or may be provided integrally with the top panel 20 .
  • the top panel 20 is provided with the same number of outlets 11 for the outdoor unit as the outlets 112 .
  • three fans 100 are provided in the fan chamber 3, and each fan 100 has one discharge port 112, so that the outdoor unit as a whole has a total of three discharge ports 112. .
  • the top panel 20 is formed with three outdoor unit outlets 11 .
  • the position and size of each outdoor unit outlet 11 are adjusted according to the position and size of each outlet 112 . That is, when the top panel 20 is properly attached to the housing 1 , the respective outlets 112 are arranged at the respective outdoor unit outlets 11 .
  • the plurality of outlets 112 are arranged at the outdoor unit outlet 11 of the top panel 20 .
  • the upper surface of the housing on which the top panel 20 is provided is the discharge port arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged to face the front and back directions of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the front-rear direction.
  • the total width of the plurality of discharge ports 112 in the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is greater than the width of the blower chamber 3 in the same direction.
  • at least the horizontal direction is included in the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed. Therefore, also in this example, in other words, the total width of the outlets 112 in the direction perpendicular to the rotating shaft of the fan 100 and parallel to the outlet arrangement surface is greater than the width of the fan chamber 3 in the same direction.
  • FIG. 16 is a front view of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 17 is a cross-sectional view of the outdoor unit of the refrigeration cycle device.
  • 18 and 19 are front views of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 20 is a front view of a modification of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 21 is a front view of a first modification of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 22 is a front view of a second alternative example of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 23 is a cross-sectional view showing a second alternative example of the outdoor unit of the refrigeration cycle apparatus.
  • 24 and 25 are front views showing a second alternative example of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 26 is a front view of a modification of the outdoor unit of the refrigeration cycle apparatus with the front panel removed.
  • FIG. 27 is a front view showing a modification of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 28 is a perspective view of a blower included in a modification of the outdoor unit of the refrigeration cycle apparatus.
  • FIG. 29 is a cross-sectional view of a blower included in a modification of the outdoor unit of the refrigeration cycle apparatus.
  • each blower of the outdoor unit was provided with one discharge port.
  • Embodiment 2 described here two or more outlets are provided in one blower.
  • the outdoor unit of the refrigeration cycle apparatus according to the second embodiment will be described below, focusing on differences from the first embodiment.
  • the configuration whose description is omitted is basically the same as that of the first embodiment.
  • the same reference numerals as those used in the description of the first embodiment are attached to the same or corresponding configurations as those of the first embodiment.
  • each of the two fans 100 has two outlets 112, so that the outdoor unit as a whole has four outlets 112 in total.
  • a front panel 10 is provided on the front surface of the portion of the housing 1 where the blower chamber 3 is arranged.
  • An outdoor unit outlet 11 is formed in the front panel 10 .
  • a grid-like grill 12 may be provided at the outdoor unit outlet 11 .
  • the front panel 10 is provided with the same number of outlets 11 for the outdoor unit as the outlets 112 .
  • the outdoor unit as a whole has a total of four outlets 112 .
  • the front panel 10 is formed with four outdoor unit outlets 11 .
  • the position and size of each outdoor unit outlet 11 are adjusted according to the position and size of each outlet 112 . That is, when the front panel 10 is properly attached to the housing 1 , the respective outlets 112 are arranged at the respective outdoor unit outlets 11 .
  • the plurality of outlets 112 are arranged at the outdoor unit outlet 11 of the front panel 10 .
  • the front surface of the housing on which the front panel 10 is provided is the discharge port arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged to face the left and right side surfaces of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the left-right direction.
  • the total width of the outlets 112 in the direction parallel to the outlet arrangement surface and horizontal with the housing 1 installed is greater than the width of the fan chamber 3 in the same direction.
  • the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is the left-right direction.
  • the blower room 3 may be provided on the upper side of the housing 1 and the machine room 2 may be provided on the lower side of the housing 1 .
  • the rotation shaft of the blower 100 is arranged along the left-right direction. That is, the rotating shaft of the impeller 200 is arranged parallel to the above-described discharge port arrangement surface.
  • the fan diameter of the impeller 200 should be larger than half the width of the blower chamber 3 in the direction perpendicular to the discharge port arrangement surface, that is, in the front-rear direction. By doing so, the air volume can be further increased, and further reduction in noise and input can be achieved.
  • FIG. 21 shows the configuration of a first alternative example of the outdoor unit of the refrigeration cycle apparatus according to this embodiment.
  • two fans 100 are arranged vertically in the fan chamber 3 .
  • One of the two blowers 100 is illustrated in FIG.
  • Two discharge ports 112 are formed in each scroll casing 110 of the blower 100 .
  • each of the two fans 100 has two outlets 112, so that the outdoor unit as a whole has four outlets 112 in total.
  • a plurality of outlets 112 are arranged at an outdoor unit outlet formed in a front panel (not shown).
  • the front surface of the housing on which the front panel is provided is the outlet arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged so as to face the upper surface and the bottom surface of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the vertical direction.
  • the total width of the outlets 112 in the direction parallel to the outlet arrangement surface and horizontal with the housing 1 installed is greater than the width of the fan chamber 3 in the same direction.
  • the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is the left-right direction.
  • FIGS. 22 to 25 show a configuration of a second alternative example of the outdoor unit of the refrigeration cycle apparatus according to this embodiment.
  • one blower 100 is provided in the blower chamber 3 .
  • Two discharge ports 112 are formed in the scroll casing 110 of the blower 100 .
  • one air blower 100 has two outlets 112, so that the outdoor unit as a whole has two outlets 112 in total.
  • a front panel 10 is provided on the front surface of the portion of the housing 1 where the blower chamber 3 is arranged.
  • An outdoor unit outlet 11 is formed in the front panel 10 .
  • a grid-like grill 12 may be provided at the outdoor unit outlet 11 .
  • the front panel 10 is provided with the same number of outlets 11 for the outdoor unit as the outlets 112 .
  • the outdoor unit as a whole has a total of two outlets 112 .
  • the front panel 10 is formed with two outdoor unit outlets 11 .
  • the position and size of each outdoor unit outlet 11 are adjusted according to the position and size of each outlet 112 . That is, when the front panel 10 is properly attached to the housing 1 , the respective outlets 112 are arranged at the respective outdoor unit outlets 11 .
  • the plurality of outlets 112 are arranged at the outdoor unit outlet 11 of the front panel 10 .
  • the front surface of the housing on which the front panel 10 is provided is the discharge port arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged to face the front and back directions of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the front-rear direction.
  • the total width of the outlets 112 in the direction parallel to the outlet arrangement surface and horizontal with the housing 1 installed is greater than the width of the fan chamber 3 in the same direction.
  • the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is the left-right direction.
  • Figs. 26 to 29 show the configuration of a second modified example of the outdoor unit of the refrigeration cycle apparatus according to this embodiment.
  • two or more outlets 112 of one blower 100 are radially arranged when viewed from the front side of the housing 1 .
  • one blower 100 is provided with six outlets 112 .
  • the inner peripheral side of each discharge port 112 is arcuate around the rotating shaft of fan 100 .
  • the inner peripheral side of each discharge port 112 has an arc shape formed by a part of the concentric circle of the suction port of the blower 100 .
  • the outer peripheral side of each discharge port 112 is arcuate, which is a part of an ellipse centered on the rotation axis of fan 100 .
  • the front panel 10 is provided with the same number of outdoor unit outlets 11 as the outlets 112 .
  • the outdoor unit as a whole has a total of six outlets 112 . Therefore, the front panel 10 is formed with six outdoor unit outlets 11 .
  • the position and size of each outdoor unit outlet 11 are adjusted according to the position and size of each outlet 112 . That is, when the front panel 10 is properly attached to the housing 1 , the respective outlets 112 are arranged at the respective outdoor unit outlets 11 .
  • the plurality of outlets 112 are arranged at the outdoor unit outlet 11 of the front panel 10 .
  • the front surface of the housing on which the front panel 10 is provided is the discharge port arrangement surface.
  • a plurality of ejection ports 112 are arranged on this ejection port arrangement surface.
  • the suction port of each blower 100 is arranged to face the front and back directions of the housing 1 . That is, the rotating shaft of the blower 100 is arranged along the front-rear direction.
  • the total width of the outlets 112 in the direction parallel to the outlet arrangement surface and horizontal with the housing 1 installed is greater than the width of the fan chamber 3 in the same direction.
  • the direction parallel to the discharge port arrangement surface and horizontal with the housing 1 installed is the left-right direction.
  • the present disclosure can be used for an outdoor unit of a refrigeration cycle device having a double-suction centrifugal fan in the fan chamber of the housing.

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

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/JP2021/039323 WO2023073768A1 (ja) 2021-10-25 2021-10-25 冷凍サイクル装置の室外機
JP2023555896A JP7613606B2 (ja) 2021-10-25 2021-10-25 冷凍サイクル装置の室外機
US18/684,031 US20240392979A1 (en) 2021-10-25 2021-10-25 Outdoor unit of refrigeration cycle apparatus
EP21962318.8A EP4425060A4 (en) 2021-10-25 2021-10-25 Outdoor unit of refrigeration cycle device
CN202180103225.8A CN118103637A (zh) 2021-10-25 2021-10-25 制冷循环装置的室外机
TW111130219A TWI840912B (zh) 2021-10-25 2022-08-11 冷凍循環裝置的室外機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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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WO2023073768A1 true WO2023073768A1 (ja) 2023-05-04

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EP (1) EP4425060A4 (https=)
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TW (1) TWI840912B (https=)
WO (1) WO2023073768A1 (https=)

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EP4425060A4 (en) 2025-05-14
EP4425060A1 (en) 2024-09-04
CN118103637A (zh) 2024-05-28
TW202317922A (zh) 2023-05-01
TWI840912B (zh) 2024-05-01
JPWO2023073768A1 (https=) 2023-05-04
JP7613606B2 (ja) 2025-01-15
US20240392979A1 (en) 2024-11-28

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