WO2023148864A1 - 空気調和機 - Google Patents

空気調和機 Download PDF

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Publication number
WO2023148864A1
WO2023148864A1 PCT/JP2022/004162 JP2022004162W WO2023148864A1 WO 2023148864 A1 WO2023148864 A1 WO 2023148864A1 JP 2022004162 W JP2022004162 W JP 2022004162W WO 2023148864 A1 WO2023148864 A1 WO 2023148864A1
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WO
WIPO (PCT)
Prior art keywords
fan casing
bell mouth
side fan
hole
air conditioner
Prior art date
Application number
PCT/JP2022/004162
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
竜児 内村
雅也 友渕
遼太 福田
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/004162 priority Critical patent/WO2023148864A1/ja
Priority to JP2023578257A priority patent/JPWO2023148864A1/ja
Publication of WO2023148864A1 publication Critical patent/WO2023148864A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • 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

Definitions

  • the present disclosure relates to an air conditioner in which the inside of the housing can be washed.
  • the fan casing that houses the blower has a configuration that can be divided into two split bodies.
  • the fan casing has a casing main body portion fixed to the housing of the air conditioner and a casing division portion fixed to the casing main body portion. Furthermore, the fan casing has a pair of bellmouths disposed at the left and right suction ports formed by the casing main body and the casing division.
  • Patent Document 1 cleaning using cleaning water is not taken into consideration, but it is desirable to clean the inside of the housing of the air conditioner with cleaning water when using it in places with hygiene restrictions such as food factories. there is demand. Therefore, let us consider a case where the air conditioner described in Patent Literature 1 is washed with washing water.
  • the connecting portion between the casing main body portion and the casing dividing portion is provided near the front surface of the fan casing. Therefore, the lower end portion of the casing main body portion is shifted to the front side from the position where the center point of the fan casing is projected radially downward. The lower end portion is arc-shaped.
  • the present disclosure has been made to solve such problems, and prevents the cleaning water from remaining inside the fan casing even when the cleaning water is used to clean the fan casing.
  • An object of the present invention is to obtain an air conditioner capable of improving maintainability.
  • An air conditioner accommodates a fan and at least a portion of the fan inside, has suction ports for supplying air formed at both left and right ends, and blows out the air supplied from the suction ports.
  • a cylindrical fan casing having an air outlet formed at the top thereof, a heat exchanger through which the air passes when the blower is driven, and a housing that accommodates the fan casing and the heat exchanger.
  • the fan casing includes a back side fan casing fixed to the housing, a front side fan casing detachably provided in front of the back side fan casing, and the back side fan casing and the front side fan casing.
  • a ring-shaped bell mouth portion detachably provided at the suction port of the fan casing formed by The position of the lower connecting portion between the rear-side fan casing and the front-side fan casing is shifted to the rear side from a position where the center point of the cylindrical fan casing is projected radially downward.
  • the fan casing is composed of the back side fan casing and the front side fan casing.
  • the rear-side fan casing and the front-side fan casing are connected at two upper and lower positions.
  • the position of the lower connecting portion between the rear-side fan casing and the front-side fan casing is shifted to the rear side from the position where the center point of the cylindrical fan casing is projected radially downward. Therefore, even when the fan casing is washed with washing water, the washing water flows downward from the lower connecting portion. As a result, it is possible to prevent the wash water from remaining inside the fan casing. Therefore, it is possible to eliminate the trouble of wiping off the remaining cleaning water, and improve maintainability.
  • FIG. 1 is a refrigerant circuit diagram showing an example of a configuration of a refrigeration cycle device provided with an air conditioner according to Embodiment 1.
  • FIG. 1 is a perspective view showing the configuration of an air conditioner according to Embodiment 1.
  • FIG. 2 is a perspective view showing the configuration of a blower provided in the air conditioner according to Embodiment 1; 2 is a perspective view showing the configuration of a fan casing provided in the air conditioner according to Embodiment 1.
  • FIG. FIG. 4 is an explanatory diagram showing how wash water flows in the fan casing provided in the air conditioner according to Embodiment 1;
  • FIG. 3 is a perspective view showing the configuration of a back-side fan casing of the fan casing provided in the air conditioner according to Embodiment 1;
  • FIG. 2 is a perspective view showing the configuration of the front side fan casing of the fan casing provided in the air conditioner according to Embodiment 1;
  • FIG. 8 is a partial enlarged view schematically showing upper flanges of the rear-side fan casing shown in FIG. 6 and the front-side fan casing shown in FIG. 7;
  • FIG. 8 is a right side view showing a state in which the back-side fan casing shown in FIG. 6 and the front-side fan casing shown in FIG. 7 are temporarily assembled;
  • FIG. 3 is a perspective view showing the configuration of a bell mouth portion provided in the fan casing of the air conditioner according to Embodiment 1;
  • FIG. 4 is a perspective view showing a method of attaching a bell mouth portion provided in the air conditioner according to Embodiment 1; 4 is a partially enlarged right side view showing the configuration of the through hole of the bell mouth provided in the fan casing of the air conditioner according to Embodiment 1.
  • FIG. FIG. 7 is a right side view showing a method of fixing the front side fan casing and the rear side fan casing of the fan casing of the air conditioner according to Modification 1 of Embodiment 1;
  • FIG. 10 is a diagram showing a configuration of a bell mouth fixing screw for fixing a bell mouth portion of the fan casing of the air conditioner according to Modification 2 of Embodiment 1; FIG.
  • FIG. 10 is a diagram showing a configuration of a bell mouth fixing screw for fixing a bell mouth portion of the fan casing of the air conditioner according to Modification 2 of Embodiment 1;
  • FIG. 10 is a diagram showing a comparative example in which the front-side and rear-side casings are divided at a position closer to the front;
  • the present disclosure includes all combinations of configurations that can be combined among configurations shown in the following embodiments and modifications thereof.
  • the same reference numerals denote the same or corresponding parts, which are common throughout the specification.
  • the relative dimensional relationship, shape, etc. of each component may differ from the actual one.
  • the Z direction indicates the height direction of the air conditioner, for example, the vertical direction.
  • the X direction is the width direction of the air conditioner.
  • the X direction is, for example, the horizontal direction.
  • the Y direction is the depth direction of the air conditioner.
  • the Y direction indicates a direction intersecting the X direction and the Z direction, for example the horizontal direction.
  • FIG. 1 is a refrigerant circuit diagram showing an example of the configuration of a refrigeration cycle apparatus provided with an air conditioner according to Embodiment 1.
  • FIG. 1 a case where the refrigeration cycle apparatus shown in FIG. 1 constitutes an air conditioning system 200 will be described as an example.
  • the refrigeration cycle device is not limited to that case, and can be applied to other systems such as water heaters, hot water heaters, temperature-controlled ventilation devices, temperature-controlled air cleaning devices, cold storage warehouses, and freezer warehouses. It is possible.
  • the refrigeration cycle device that constitutes the air conditioning system 200 has an outdoor unit 202 and an indoor unit 203.
  • the outdoor unit 202 and the indoor unit 203 are connected via refrigerant pipes 204 .
  • the outdoor unit 202 is provided with a compressor 205, a four-way valve 206, an outdoor heat exchanger 207a, an outdoor fan 208a, and an expansion valve 209.
  • the indoor unit 203 is provided with an indoor heat exchanger 207b, an indoor fan 208b, and an expansion valve 210. As shown in FIG.
  • the outdoor unit 202 and the indoor unit 203 are sometimes called the air conditioner 100 respectively. At least one of the outdoor unit 202 and the indoor unit 203 constitutes the "air conditioner 100" according to the first embodiment. In addition, in Embodiment 1, a case where the indoor unit 203 constitutes the "air conditioner 100" according to Embodiment 1 will be described.
  • the compressor 205 sucks the refrigerant flowing through the refrigerant pipe 204 .
  • Compressor 205 compresses the sucked refrigerant and discharges it to refrigerant pipe 204 .
  • Compressor 205 is, for example, an inverter compressor.
  • the compressor 205 is an inverter compressor, the operating frequency is arbitrarily changed by an inverter circuit or the like under the control of a control device (not shown) to change the capacity of the compressor 205 to send out refrigerant per unit time. good too.
  • the refrigerant discharged from the compressor 205 flows into the indoor heat exchanger 207b during heating, and flows into the outdoor heat exchanger 207a during cooling.
  • the outdoor heat exchanger 207a exchanges heat between the refrigerant flowing inside the outdoor heat exchanger 207a and the outdoor air.
  • the outdoor heat exchanger 207a functions as a condenser during cooling operation, and condenses and liquefies the refrigerant.
  • the outdoor heat exchanger 207a functions as an evaporator during heating operation, and evaporates the refrigerant.
  • the indoor heat exchanger 207b exchanges heat between the refrigerant flowing inside the indoor heat exchanger 207b and the indoor air to be air-conditioned.
  • the indoor heat exchanger 207b functions as an evaporator during the cooling operation and evaporates the refrigerant.
  • the indoor heat exchanger 207b functions as a condenser during heating operation, and condenses and liquefies the refrigerant.
  • the outdoor heat exchanger 207a and the indoor heat exchanger 207b are, for example, fin-and-tube heat exchangers having heat transfer tubes and fins.
  • the outdoor heat exchanger 207a and the indoor heat exchanger 207b may be collectively called the heat exchanger 207.
  • At least one of the outdoor heat exchanger 207a and the indoor heat exchanger 207b constitutes the "heat exchanger 2" of the "air conditioner 100" according to the first embodiment.
  • the outdoor fan 208a has a motor 281a and wing portions 282a.
  • the outdoor fan 208a blows outdoor air to the outdoor heat exchanger 207a.
  • the indoor fan 208b has a motor 281b and a wing portion 282b.
  • the indoor fan 208b blows indoor air to the indoor heat exchanger 207b.
  • the motor 281a and the motor 281b may be collectively called the motor 281.
  • Wings 282 a and 282 b may be collectively called wing 282 .
  • the outdoor fan 208a and the indoor fan 208b may be collectively referred to as the fan 208.
  • At least one of outdoor fan 208a and indoor fan 208b constitutes "fan 1" of "air conditioner 100" according to the first embodiment.
  • the four-way valve 206 is configured to switch between a cooling operation for cooling the indoor space provided with the indoor unit 203 and a heating operation for heating the indoor space.
  • the four-way valve 206 is a channel switching device that switches the flow of refrigerant between cooling operation and heating operation. In the case of heating operation, the four-way valve 206 is in the state indicated by the solid line in FIG. 1, and the refrigerant discharged from the compressor 205 flows into the indoor heat exchanger 207b. At this time, the indoor heat exchanger 207b of the indoor unit 203 functions as a condenser, and the outdoor heat exchanger 207a of the outdoor unit 202 functions as an evaporator.
  • the four-way valve 206 is in the state indicated by the dashed line in FIG.
  • the outdoor heat exchanger 207a of the outdoor unit 202 functions as a condenser
  • the indoor heat exchanger 207b of the indoor unit 203 functions as an evaporator.
  • the expansion valve 209 is a decompression device that decompresses and expands the refrigerant, and is composed of, for example, an electronic expansion valve.
  • the expansion valve 209 is an electronic expansion valve, the opening degree is adjusted based on instructions from a control device (not shown) or the like.
  • the expansion valve 209 is provided between the outdoor heat exchanger 207 a of the outdoor unit 202 and the indoor heat exchanger 207 b of the indoor unit 203 .
  • the compressor 205, the four-way valve 206, the indoor heat exchanger 207b, the expansion valve 209, and the outdoor heat exchanger 207a are connected by refrigerant pipes 204 to form a refrigerant circuit.
  • the high-pressure, high-temperature gaseous refrigerant discharged from the compressor 205 flows through the four-way valve 206 into the indoor heat exchanger 207b.
  • the indoor heat exchanger 207b the refrigerant is condensed by exchanging heat with indoor air supplied by the indoor fan 208b.
  • the condensed refrigerant becomes a high-pressure liquid state and flows out from the indoor heat exchanger 207b.
  • the refrigerant is depressurized by the expansion valve 209 and becomes a low-pressure gas-liquid two-phase state.
  • the low-pressure gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 207a.
  • the outdoor heat exchanger 207a the refrigerant evaporates by exchanging heat with the outdoor air supplied by the outdoor fan 208a.
  • the evaporated refrigerant becomes a low-pressure gas state and is sucked into the compressor 205 .
  • the refrigerant flows in the direction opposite to that in heating operation. That is, when the air conditioning system 200 is in a cooling operation, the high-pressure, high-temperature gaseous refrigerant discharged from the compressor 205 flows through the four-way valve 206 into the outdoor heat exchanger 207a. In the outdoor heat exchanger 207a, the refrigerant is condensed by exchanging heat with the outdoor air supplied by the outdoor fan 208a. The condensed refrigerant becomes a high-pressure liquid state and flows out from the outdoor heat exchanger 207a. Then, the refrigerant is depressurized by the expansion valve 209 and becomes a low-pressure gas-liquid two-phase state.
  • the low-pressure gas-liquid two-phase refrigerant flows into the indoor heat exchanger 207b.
  • the refrigerant evaporates by exchanging heat with indoor air supplied by the indoor fan 208b.
  • the evaporated refrigerant becomes a low-pressure gas state and is sucked into the compressor 205 .
  • FIG. 2 is a perspective view showing the configuration of the air conditioner according to Embodiment 1.
  • FIG. 2 for the sake of explanation, illustration of the appearance of the front side of the air conditioner 100 or the front panel constituting the air passage is omitted.
  • the air conditioner 100 includes a blower 1, a heat exchanger 2, a control box 3, a drain pan 4, and a housing 101.
  • the blower 1, the heat exchanger 2, the control box 3, and the drain pan 4 are arranged inside the housing 101, and are usually attached to the front panel of the housing 101, so they are exposed to the outside. not
  • the housing 101 has a box shape. Six sides of the housing 101 are formed by a top plate 101a, a bottom plate (not shown), a front panel (not shown), a rear panel (not shown), and a pair of side panels 101b. A pair of side panels 101b are arranged symmetrically in the housing 101 and face each other. Also, the top plate 101a and the bottom plate are arranged in the housing 101 so as to face each other. Furthermore, the front panel and the rear panel are arranged to face each other in the housing 101 . Note that the bottom plate is not necessarily provided, and the drain pan 4 may be used as the bottom plate.
  • the white arrow A in Fig. 2 indicates the direction of air flow.
  • Air is supplied to the inside of the housing 101 by generating an air flow by driving the blower 1 .
  • a front panel (not shown) of the housing 101 is provided with a housing suction port (not shown) for sucking air.
  • the top plate 101a of the housing 101 is provided with a housing outlet 101c for blowing air.
  • the air supplied to the inside of the housing 101 by driving the blower 1 is sent to the heat exchanger 2 .
  • the air sent to the heat exchanger 2 is conditioned by passing through the heat exchanger 2 and is blown out from the housing outlet 101c provided in the top plate 101a of the air conditioner 100.
  • the air conditioner 100 can wash the inside of the housing 101, so that the blower 1, the heat exchanger 2, and the like can be washed. Washing water used for washing the inside of the housing 101 is collected in the drain pan 4 .
  • the blower 1 is arranged at the top inside the housing 101 .
  • the number of fans 1 is not particularly limited.
  • they are arranged side by side in the X direction, for example, as shown in FIG.
  • control box 3 is arranged at the top inside the housing 101 .
  • the control box 3 is arranged side by side in the X direction with respect to the blower 1 .
  • the control box 3 is arranged on the left side of the blower 1 .
  • a control board for controlling the operation of the blower 1 and the like is provided inside the control box 3 .
  • the heat exchanger 2 is arranged at the bottom inside the housing 101 . That is, the heat exchanger 2 is arranged below the blower 1 and the control box 3 .
  • the heat exchanger 2 is, for example, a fin-and-tube heat exchanger having heat transfer tubes and fins. In this case, the heat exchanger 2 performs heat exchange between the refrigerant flowing inside the heat transfer tubes and the air flowing along the fins to condition the air.
  • the heat exchanger 2 is arranged at an angle inside the housing 101 . Specifically, the heat exchanger 2 extends in a direction intersecting the XZ plane and the XY plane so that the upper portion of the heat exchanger 2 is closer to the front panel and the lower portion of the heat exchanger 2 is closer to the rear panel.
  • the reason for arranging the heat exchanger 2 obliquely is that the outer dimensions of the housing 101 can be reduced while securing a wider effective area of the heat exchanger 2 than when the heat exchanger 2 is arranged parallel to the XY plane. This is to reduce the
  • a drain pan 4 is arranged below the heat exchanger 2 .
  • the drain pan 4 is arranged at an angle with respect to the XY plane in order to efficiently drain condensed water generated in the heat exchanger 2 and washing water during washing. Condensed water and cleaning water are discharged to the outside of the housing 101 via the drain pan 4 through a drain port (not shown) connected to the drain pan 4 .
  • the drain port is arranged, for example, on the side panel 101b, the rear panel, or the bottom plate of the housing 101, but the arrangement position is not particularly limited.
  • the inclination direction of the drain pan 4 may be appropriately determined according to the positional relationship with the drain port.
  • FIG. 3 is a perspective view showing the configuration of the blower provided in the air conditioner according to Embodiment 1.
  • the blower 1 includes a motor 5 and a sirocco fan 6 directly connected to the motor 5 .
  • the sirocco fan 6 a plurality of elongated rectangular plate-like blades 6a are arranged at intervals in the circumferential direction.
  • the longitudinal direction of the blades 6 a is parallel to the axial direction of the sirocco fan 6 .
  • the sirocco fan 6 forms a swirling flow in a direction substantially perpendicular to the rotation axis of the sirocco fan 6 by the centrifugal force of a plurality of cylindrically arranged blades 6a.
  • the generated swirling flow is rectified in one direction by the scroll, and the pressure rises. Further, in the sirocco fan 6, the swirling flow is blown out from one outlet 7a (see FIG. 4). In this way, the sirocco fan 6 has only one outlet, so that the area of the opening through which the air is blown out is reduced, and the air is concentrated in a certain direction.
  • the rotating shaft of the sirocco fan 6 is connected to the rotating shaft of the motor 5 .
  • the sirocco fan 6 is rotationally driven by the rotation of the motor 5, thereby forming an air flow.
  • the motor 5 constitutes the motor 281 shown in FIG. 1 (see 281a and 281b in FIG. 1).
  • the sirocco fan 6 constitutes the wing portions 282 shown in FIG. 1 (see 282a and 282b in FIG. 1).
  • the sirocco fan 6 is housed inside the fan casing 7 .
  • the fan casing 7 basically has a cylindrical shape and is arranged around the sirocco fan 6 so as to cover the sirocco fan 6 .
  • the motor 5 of the blower 1 is arranged outside the fan casing 7 .
  • the motor 5 is attached to a motor mount 8, for example.
  • the motor mount 8 is attached to the housing 101 .
  • the fan casing 7 accommodates at least part of the blower 1 inside.
  • the fan casing 7 is fixed to the top plate 101 a of the housing 101 .
  • the blower 1 is arranged on the right side of the control box 3, for example.
  • the sirocco fan 6 of the blower 1 and its surroundings can be washed by curing the wiring outlet of the control box 3 and the control box main body and curing the motor 5 .
  • curing means covering the wiring outlet of the control box 3, the control box main body, and the motor 5 with a waterproof sheet or the like so as not to get wet with washing water.
  • the fan casing 7 has a structure that can be divided into a front side and a rear side. By removing the front side, the sirocco fan 6 housed inside the fan casing 7 can be washed with washing water.
  • Various maintenance such as
  • FIG. 4 is a perspective view showing a configuration of a fan casing provided in the air conditioner according to Embodiment 1.
  • FIG. FIG. 5 is an explanatory diagram showing how cleaning water flows in the fan casing provided in the air conditioner according to Embodiment 1.
  • FIG. 6 is a perspective view showing the configuration of the back side fan casing of the fan casing provided in the air conditioner according to Embodiment 1.
  • FIG. 7 is a perspective view showing the configuration of the front side fan casing of the fan casing provided in the air conditioner according to Embodiment 1.
  • FIG. 8 is a partially enlarged view schematically showing upper flanges of the rear fan casing shown in FIG. 6 and the front fan casing shown in FIG. 7.
  • FIG. FIG. 9 is a right side view showing a state in which the back side fan casing shown in FIG. 6 and the front side fan casing shown in FIG. 7 are temporarily assembled.
  • the fan casing 7 includes a rear fan casing 9, a front fan casing 10, and a bell mouth portion 11.
  • the fan casing 7 thus has a structure that can be divided into a front side (ie front side fan casing 10) and a rear side (ie rear side fan casing 9).
  • a front side fan casing 10 By removing the front side fan casing 10 from the rear side fan casing 9 in the fan casing 7, the sirocco fan 6 accommodated inside the fan casing 7 can be cleaned using cleaning water for maintenance. .
  • the white arrow B indicates the direction of air flow.
  • Both ends of the cylindrical fan casing 7 in the X direction are open.
  • the opening has a circular shape when viewed from one end in the X direction.
  • the openings at both ends of the cylindrical fan casing 7 in the X direction function as suction ports 7 b of the fan casing 7 .
  • the fan casing 7 supplies air to the inside from these suction ports 7b.
  • the upper end portion of the fan casing 7 forms a rectangular tubular opening.
  • the opening has a rectangular shape in plan view. Further, the opening functions as an air outlet 7 a of the fan casing 7 .
  • the fan casing 7 blows out the air sucked from the suction port 7b to the outside from the blowout port 7a.
  • the fan casing 7 has an air outlet 7a at the top and suction ports 7b at both ends in the X direction (that is, both left and right ends).
  • the back side fan casing 9 is fixed to the housing 101 .
  • the back side fan casing 9 is fixed to the top plate 101a of the housing 101, for example.
  • the back side fan casing 9 has a body plate 14a forming the body of the back side fan casing 9 and side plates 15a provided at both ends of the body plate 14a in the X direction.
  • the shell plate 14a has a back shell plate 14a-1 and a front shell plate 14a-2.
  • the body plate 14a-1 on the back side is composed of a rectangular plate member having a constant width in the X direction.
  • the body plate 14a-1 is formed in a substantially semicircular arc shape when viewed from one end in the X direction.
  • the curvature of the body plate 14a-1 may not be constant, and may be curved in a curved shape combining a plurality of curvatures.
  • the body plate 14a-1 is made of sheet metal, for example, and is formed by bending.
  • the two side plates 15a are arranged to face each other.
  • the two side plates 15a are connected to each other by body plates 14a-1 and 14a-2.
  • the side plate 15a When viewed from one end in the X direction, the side plate 15a has a shape obtained by adding a parallelogram shape to the upper part of the right half of the donut shape, as shown in FIG.
  • One edge 15aa-1 of the side plate 15a in the Y direction is formed in a substantially semicircular arc shape to match the shape of the body plate 14a.
  • the other edge portion 15aa-2 of the side plate 15a in the Y direction is formed in a substantially semicircular arc shape having a curvature different from that of the edge portion 15aa-1. Further, as shown in FIG. 6, the length of the front body plate 14a-2 in the Z direction is much shorter than that of the rear body plate 14a-1.
  • the front body plate 14a-2 is arranged to face the rear body plate 14a-1.
  • the body plate 14a-2 on the front side is composed of a rectangular plate member having a constant width in the X direction.
  • the body plate 14a-2 on the front side is formed in a substantially L shape when viewed from one end in the X direction.
  • the body plate 14a-2 is made of sheet metal, for example, and is formed by bending.
  • the body plate 14a-2 on the front side may be bent smoothly into a curved shape, or may be bent into a shape in which a plurality of straight lines are combined.
  • the upper end of the rear side fan casing 9 is an opening surrounded by body plates 14a-1 and 14a-2 and two side plates 15a. serves as the outlet 7a of the fan casing 7, as described above.
  • the front side fan casing 10 is detachably provided on the front side of the rear side fan casing 9 .
  • the front-side fan casing 10 has a body plate 14b forming the body of the front-side fan casing 10 and side plates 15b provided at both ends of the body plate 14b in the X direction.
  • the body plate 14b is formed of a rectangular plate-like member having a constant width in the X direction.
  • the body plate 14b is formed in a substantially semicircular arc shape when viewed from one end in the X direction.
  • the curvature of the trunk plate 14b may not be constant, and may be curved in a curved shape combining a plurality of curvatures.
  • the trunk plate 14b is made of sheet metal, for example, and is formed by bending. Also, the two side plates 15b are arranged to face each other. When viewed from one end in the X direction, the side plate 15b has a left half donut shape as shown in FIG. However, the width of the donut shape is not constant, and as shown in FIG. 9, it gradually tapers in the upward direction Z1 in the Z direction.
  • One edge 15bb-1 of the side plate 15b in the Y direction is formed in a substantially semicircular arc shape to match the shape of the body plate 14b.
  • the other edge portion 15bb-2 of the side plate 15b in the Y direction is formed in a substantially semicircular arc shape having a curvature different from that of the edge portion 15bb-1.
  • the rear-side fan casing 9 and the front-side fan casing 10 are connected at two upper and lower connecting portions to form a cylindrical shape, and constitute the main body of the fan casing 7 shown in FIG.
  • the lower connecting portion will be referred to as “connecting portion 13a” or “lower connecting portion 13a”
  • the upper connecting portion will be referred to as “connecting portion 13b” or “upper connecting portion 13b”.
  • the bell mouth portion 11 is detachably attached to the suction port 7b of the fan casing 7 formed by the back side fan casing 9 and the front side fan casing 10.
  • the bell mouth portion 11 has a donut-shaped annular shape (or ring shape) as shown in FIG. 10 to be described later.
  • the bell mouth portion 11 has, for example, an annular shape.
  • the flange portion 15 extends toward the inside of the suction port 7b, as shown in FIG. 11, which will be described later.
  • the flange portion 15 is provided over the entire circumference of the suction port 7b.
  • the flange portions 15 are arranged parallel to each other on the YZ plane.
  • the bell mouth portion 11 is attached to the flange portion 15 with a bell mouth fixing screw 12 .
  • a bell mouth fixing screw 12 Although four bell mouth fixing screws 12 are used in the example of FIG. 4, the number of bell mouth fixing screws 12 is not particularly limited.
  • the fan casing 7 is divided into the rear fan casing 9 and the front fan casing 10, which are connected via the left and right bell mouth portions 11. As shown in FIG. By fixing the left and right bell mouth portions 11 with the bell mouth fixing screws 12 respectively, the respective positions of the back side fan casing 9 and the front side fan casing 10 are held.
  • the lower connecting portion 13a connecting the rear-side fan casing 9 and the front-side fan casing 10 extends in the Y direction from a position Cdw projected radially downward from the center point O of the fan casing 7. , is shifted to the rear side.
  • the center point O is the center of the circular suction port 7b.
  • the center point O may be the center of the rotation axis of the sirocco fan 6 arranged inside the fan casing 7 .
  • the position of the position Cdw in the Z direction is lower than the position of the lower end of the connecting portion 13a.
  • the position Cdw is preferably the lowest position in the Z direction of the fan casing 7 .
  • the position of the lower connecting portion 13a in the Y direction is not the position Cdw directly below the center point O of the fan casing 7, but the position shifted from the position Cdw to the rear side.
  • the washing water flows as indicated by arrow E. Therefore, the cleaning water does not remain in the back side fan casing 9, so that the trouble of wiping off the cleaning water can be saved. This will be explained concretely.
  • FIG. 5 the position of the upper connecting portion 13b is not the position Cup directly above the center point O of the fan casing 7, but the position shifted to the front side in the Y direction from the position Cup.
  • FIG. 9 is a right side view when the back side fan casing 9 and the front side fan casing 10 are temporarily assembled. A worker hooks the upper flange 16 b of the front fan casing 10 to the upper flange 16 a of the rear fan casing 9 . Then, the lower flange 17b of the front-side fan casing 10 moves to the position of the lower flange 17a of the rear-side fan casing 9 by the weight of the front-side fan casing 10 itself. As a result, the front fan casing 10 is closed with respect to the rear fan casing 9 . This will be explained concretely.
  • the rear-side fan casing 9 and the front-side fan casing 10 have upper flanges 16a and 16b, respectively, for connecting to each other at the upper connecting portion 13b.
  • the partial enlarged view of FIG. 8 schematically shows the upper flanges 16a and 16b shown in FIGS.
  • the upper flange 16a of the rear fan casing 9 protrudes upward in the Z direction Z1 from the lower end of the L-shaped front body plate 14a-2.
  • the upper flange 16a may extend in the upward direction Z1 in the Z direction, or may be inclined with respect to the upward direction Z1 in the Z direction.
  • the upper flange 16b of the front fan casing 10 protrudes upward in the Z direction Z1 from the upper end of the body plate 14b.
  • a hook portion 16bb is provided at the tip of the upper flange 16b. As shown in FIG. 8, the hooking portion 16bb extends in a direction intersecting the extending direction of the upper flange 16b.
  • the extending direction of the hook portion 16bb and the extending direction of the upper flange 16b may be orthogonal, for example. In that case, the angle of the hook portion 16bb with respect to the upper flange 16b is 90°.
  • the hook portion 16bb is formed by bending the tip portion of the upper flange 16b of the front-side fan casing 10 .
  • the shape of the upper flange 16b including the hook portion 16bb is V-shaped or L-shaped.
  • the hooking portion 16bb is hooked to and engaged with the upper flange 16a of the rear-side fan casing 9 . Therefore, the extending direction (or angle) of the hooking portion 16bb with respect to the upper flange 16b may be appropriately set so as to facilitate engagement with the upper flange 16a.
  • the rear fan casing 9 and the front fan casing 10 have lower flanges 17a and 17b, respectively, for connecting to each other at the lower connecting portion 13a. ing.
  • the lower flange 17a of the rear fan casing 9 protrudes downward in the Z direction Z2 from the lower end of the rear body plate 14a-1.
  • the lower flange 17b of the front fan casing 10 protrudes downward in the Z direction Z2 from the lower end of the body plate 14b.
  • a worker hooks the hooking portion 16bb of the upper flange 16b of the front side fan casing 10 to the upper flange 16a of the rear side fan casing 9 for engagement.
  • the lower flange 17b of the front fan casing 10 is moved by the weight of the front fan casing 10 to a position where it contacts the lower flange 17a of the rear fan casing 9, as indicated by arrow F in FIG. do.
  • the inclination angle of the upper flange 16a may be appropriately determined in consideration of the position of the center of gravity of the front side fan casing 10. good.
  • the front-side fan casing 10 moves by its own weight to the position of the lower connecting portion 13a and is closed.
  • the upper end portion and the lower end portion of the casing divided portion are each fixed to the casing main body portion by four screws.
  • a total of eight screws were used at the upper end and lower end of the casing dividing portion.
  • the upper flanges 16a and 16b and the lower flanges 17a and 17b do not need to be screwed. can be reduced.
  • FIG. 10 is a perspective view showing the configuration of a bell mouth portion provided in the fan casing of the air conditioner according to Embodiment 1.
  • FIG. 10 is a perspective view showing the configuration of a bell mouth portion provided in the fan casing of the air conditioner according to Embodiment 1.
  • the ring-shaped bell mouth portion 11 is provided with a plurality of through holes 18 .
  • the through hole 18 penetrates through the plate thickness of the bell mouth portion 11 .
  • the shape of the through hole 18 is, for example, circular.
  • the bell mouth fixing screws 12 attached to the rear fan casing 9 and the front fan casing 10 are inserted into the through holes 18 .
  • FIG. 10 shows a case where four through holes 18 are provided in the bell mouth portion 11, but the number of through holes 18 is not particularly limited.
  • FIG. 11 is a perspective view showing a method of attaching a bell mouth portion provided in the air conditioner according to Embodiment 1.
  • FIG. A method of attaching the bell mouth portion will be described with reference to FIG.
  • bell mouth fixing screws 12 are attached to the back side fan casing 9 and the front side fan casing 10 so as to match the positions of the through holes 18 of the bell mouth portion 11 .
  • the bellmouth fixing screw 12 is composed of, for example, a hexagon screw shown in FIG. 14 which will be described later.
  • the bell mouth fixing screw 12 is inserted into and attached to a screw hole 20 formed in the rear fan casing 9 and the front fan casing 10 .
  • the bell mouth fixing screw 12 functions as a "first locking part".
  • the through hole 18 provided in the bell mouth portion 11 functions as a "second locking portion".
  • the "second locking portion” is engaged with the "first locking portion”.
  • the bell mouth portion 11 is fixed to the rear side fan casing 9 and the front side fan casing 10 by engaging the "first locking portion” and the “second locking portion”. Further, the bell mouth portion 11 can be detached from the rear side fan casing 9 and the front side fan casing 10 by disengaging the “first locking portion” and the “second locking portion”. become a state.
  • the threaded portion of the bell mouth fixing screw 12, which is the “first locking portion”, is passed through the through hole 18, which is the “second locking portion”, so that the bell mouth fixing screw 12 is inserted.
  • the bell mouth portion 11 is fixed to the back side fan casing 9 and the front side fan casing 10 .
  • the inner diameter of the through hole 18 (circular hole) is smaller than the outer diameter of the screw head of the bell mouth fixing screw 12 .
  • FIG. 12 is a partially enlarged right side view showing the configuration of the through hole of the bell mouth provided in the fan casing of the air conditioner according to Embodiment 1.
  • the through hole 18 may be a daruma hole instead of a circular hole.
  • the through hole 18 has a first through hole 18a and a second through hole 18b with different diameters.
  • the first through holes 18a and the second through holes 18b are arranged side by side in the circumferential direction. Also, the first through hole 18a and the second through hole 18b communicate with each other.
  • the diameter of the first through hole 18a is larger than the diameter of the second through hole 18b.
  • the first through hole 18 a has a diameter larger than the outer diameter of the screw head of the bell mouth fixing screw 12 .
  • the second through hole 18 b has a diameter smaller than the outer diameter of the screw head of the bell mouth fixing screw 12 .
  • the second through hole 18b is an elongated hole extending in the circumferential direction.
  • the second through hole 18b is composed of, for example, a portion of an elliptical shape extending in the circumferential direction.
  • a method of attaching the bell mouth portion 11 when the through hole 18 is a daruma hole will be described with reference to FIG.
  • four bell mouth fixing screws 12 are temporarily fixed to the rear side fan casing 9 and the front side fan casing 10. As shown in FIG.
  • the bell mouth fixing screw 12 is passed through the first through hole 18 a of the through hole 18 (daruma hole) of the bell mouth portion 11 .
  • the bell mouth portion 11 is slid in the circumferential direction indicated by arrow G in FIGS. 11 and 12, that is, counterclockwise.
  • the first through hole 18a is arranged in front of the second through hole 18b in the circumferential direction indicated by the arrow G.
  • the second through hole 18b moves below the screw head portion 12a (see FIG. 14) of the bell mouth fixing screw 12.
  • the peripheral region of the second through hole 18b is fitted between the head bearing surface 12d of the screw head 12a of the bell mouth fixing screw 12 and the side plate 15a (or side plate 15b) of the fan casing 7. be.
  • the bell mouth portion 11 is temporarily assembled.
  • the four bell mouth fixing screws 12 are tightened. Thereby, the bell mouth portion 11 is fixed.
  • the provisionally assembled back side fan casing 9 and front side fan casing 10 are also firmly fixed via the bell mouth portion 11 by tightening the bell mouth fixing screw 12 at the same time.
  • the bell mouth fixing screw 12 is inserted into the second through hole 18b after the bell mouth fixing screw 12 is inserted into the first through hole 18a.
  • the mouse part 11 is rotated in the circumferential direction (for example, in the direction of arrow G).
  • the bell mouth portion 11 is fixed to the back side fan casing 9 and the front side fan casing 10 .
  • the fastening state of the bell mouth fixing screw 12 is loosened as necessary, and the bell mouth fixing screw 12 is inserted into the first through hole 18a.
  • the mouth portion 11 is rotated in a direction opposite to the circumferential direction (for example, a direction opposite to the arrow G). As a result, the bell mouth portion 11 becomes detachable from the back side fan casing 9 and the front side fan casing 10 .
  • the bell mouth portion 11 can be attached and detached simply by loosening the fastening state of the bell mouth fixing screw 12 when attaching and detaching the bell mouth portion 11 . Therefore, it is not necessary to remove the bell mouth fixing screw 12 completely. Therefore, it requires less labor for workers and is excellent in maintainability.
  • FIG. 16 is a diagram showing a comparative example in which the front-side and rear-side casings are divided at the front side.
  • FIG. 16 only the position of the lower connecting portion 13a is changed in the configuration of FIG. 5 showing the first embodiment in order to facilitate comparison with the first embodiment.
  • the connecting portion 13a of the comparative example in FIG. 16 is called a “connecting portion 13aR” to distinguish it from the connecting portion 13a in FIG.
  • the front side fan casing 10 is removed from the rear side fan casing 9 when cleaning the inside of the fan casing 7 .
  • washing water is injected into the fan casing 7 from the direction indicated by the arrow D in FIG. 16 to wash the inside of the fan casing 7 and the sirocco fan 6 .
  • the washing water that has washed the inside of the fan casing 7 and the sirocco fan 6 comes into contact with the body plate 14a-1 of the rear side fan casing 9, and as it is, moves toward the body plate 14a-1 as indicated by the arrow ER in FIG. flow along the surface of 1.
  • the wash water stays inside the back side fan casing 9 as indicated by a two-dot chain line K in FIG.
  • the number of screws (8) is smaller than the number of screws (16) in the comparative example, and the screws (that is, the bell mouth fixing screws 12) must be completely removed. There is no Therefore, the work load is small and maintenance is excellent. Further, in Embodiment 1, the position of the lower connecting portion 13a between the rear-side fan casing 9 and the front-side fan casing 10 is shifted to the rear side. As a result, when the front side fan casing 10 is removed and the inside of the fan casing 7 is washed, the washing water flows down as indicated by arrow E in FIG. can be prevented.
  • Embodiment 1 the fan casing 7 is divided into the rear fan casing 9 and the front fan casing 10 so that the inside of the fan casing 7 can be washed with washing water. Then, with the front fan casing 10 removed from the rear fan casing 9, the inside of the fan casing 7 is washed with washing water.
  • the position of the lower connecting portion 13a between the rear-side fan casing 9 and the front-side fan casing 10 is shifted to the rear side from the position Cdw where the center point O of the fan casing 7 is projected radially downward.
  • the rear-side fan casing 9 and the front-side fan casing 10 have upper flanges 16a and 16b, respectively, at the upper connecting portion 13b. 7 and 8, the upper flange 16b of the front-side fan casing has a hook portion 16bb that engages with the upper flange 16a of the rear-side fan casing 9.
  • the upper flanges 16a and 16b of the fan casing 7 are not screwed. In this way, by abolishing screwing at the upper flanges 16a and 16b, the number of work steps is reduced, and maintainability is further improved.
  • the rear side fan casing 9 and the front side fan casing 10 respectively have lower flanges 17a and 17b at the lower connecting portion 13a. Then, the hook portion 16bb of the upper flange 16b of the front-side fan casing 10 is engaged with the upper flange 16a of the rear-side fan casing 9 . Then, the lower flange 17b of the front-side fan casing 10 moves by its own weight to a position where it abuts against the lower flange 17b of the rear-side fan casing 9 .
  • Embodiment 1 it is not necessary to remove the bell mouth fixing screw 12 when removing the bell mouth portion 11 . That is, in Embodiment 1, when removing the bell mouth portion 11, simply loosening the bell mouth fixing screw 12 allows the bell mouth portion 11 to slide in the circumferential direction and be removed. Therefore, since it is not necessary to completely remove the bell mouth fixing screw 12, workability is good and maintenance is excellent.
  • ⁇ Modification 1> 13 is a right side view showing a method of fixing the front-side fan casing and the rear-side fan casing of the fan casing of the air conditioner according to Modification 1 of Embodiment 1.
  • FIG. For example, it is conceivable that the lower flanges 17a and 17b vibrate due to vibration or the like due to the operation of the air conditioner 100, causing abnormal noise. In that case, stronger fixation is required. In that case, a stopper 19 may be added to the lower flange 17a of the rear fan casing 9, as shown in FIG.
  • the stopper 19 is formed by bending the tip of the lower flange 17a of the rear-side fan casing 9.
  • the stopper 19 has an L shape when viewed from one side in the X direction.
  • the stopper 19 is a leaf spring made of sheet metal.
  • an operator hooks the hooking portion 16bb of the front-side fan casing 10 to the upper flange 16a of the rear-side fan casing 9 .
  • the front fan casing 10 is moved by its own weight, and the lower flange 17b of the front fan casing 10 is brought into contact with the lower flange 17a of the rear fan casing 9.
  • the stopper 19 is pushed by the lower flange 17b of the front-side fan casing 10 and bends, and the tip of the stopper 19 is pulled downward in the Z direction Z2 as indicated by the arrow H in FIG. .
  • the stopper 19 returns to its original position due to elastic deformation and moves the lower flange 17b downward. It is biased toward the side flange 17a.
  • the stopper 19 biases the lower flange 17b toward the lower flange 17a.
  • the connection between the lower flanges 17a and 17b becomes stronger. Therefore, even if vibration or the like occurs due to operation of the air conditioner 100, the vibration of the lower flanges 17a and 17b can be suppressed, and abnormal noise can be prevented.
  • the through hole 18 formed in the bell mouth portion 11 may be either a circular hole or a pothole.
  • the stopper 19 may be provided on the lower flange 17b of the front fan casing 10 instead of the lower flange 17a of the rear fan casing 9. In that case, the stopper 19 urges the lower flange 17a toward the lower flange 17b. As a result, the connection between the lower flanges 17a and 17b becomes stronger. Therefore, even if vibration or the like occurs due to operation of the air conditioner 100, the vibration of the lower flanges 17a and 17b can be suppressed, and abnormal noise can be prevented.
  • FIG. 14 and 15 are diagrams showing a configuration of a bell mouth fixing screw for fixing the bell mouth portion of the fan casing of the air conditioner according to Modification 2 of Embodiment 1.
  • FIG. 14 shows a case where the bell mouth fixing screw 12 is a hexagonal screw.
  • FIG. 15 shows a case where the bell mouth fixing screw 12 is a countersunk screw.
  • the bell mouth fixing screws 12 are hexagonal screws in both the rear fan casing 9 and the front fan casing 10 .
  • the bell mouth fixing screw 12 may be a countersunk screw. Therefore, in Modified Example 2, the bell mouth fixing screw 12 in the rear side fan casing 9 is composed of a countersunk screw, and in the front side fan casing 10, the bell mouth fixing screw 12 is composed of a hexagonal screw. A case will be described.
  • FIG. 14 The difference in configuration between the hexagonal screw and the countersunk screw will be described below with reference to FIGS. 14 and 15.
  • FIG. 14 The difference in configuration between the hexagonal screw and the countersunk screw will be described below with reference to FIGS. 14 and 15.
  • the shape of the screw head 12a of the hexagonal screw is hexagonal in plan view. Therefore, as shown in FIG. 14(a), the screw head 12a has a hexagonal prism shape as a whole.
  • a screw portion 12b having a screw thread is attached to the screw head portion 12a.
  • An axial tip portion of the screw portion 12b is a screw tip portion 12c.
  • the surface of the screw head 12a near the screw portion 12b is referred to as a head bearing surface 12d. Since the screw portion 12b is fixed to the central portion of the head bearing surface 12d, the shape of the head bearing surface 12d is a hexagonal donut shape in plan view.
  • the bell mouth fixing screw 12 is a hexagonal screw
  • the surface pressure of the head bearing surface 12 d is applied to the surface of the fan casing 7 .
  • the bell mouth portion 11 is firmly fixed to the fan casing 7 by the surface pressure.
  • the shape of the screw head 12a of the countersunk screw is, for example, circular in plan view.
  • the side surface of the screw head 12a has a trapezoidal shape as shown in FIG. 15(a). Therefore, the screw head 12a has a truncated cone shape as a whole.
  • a screw portion 12b having a screw thread is attached to the screw head portion 12a.
  • the screw head 12a is provided with a tool hole 12e on the tip surface thereof, if necessary.
  • the tool hole 12e may also be provided in the hexagonal screw shown in FIG. 14, if necessary. Further, as shown in FIG.
  • the tip in the axial direction of the screw portion 12b of the countersunk screw is a screw tip 12c.
  • the side surface of the screw head 12a is tapered toward the screw portion 12b as shown in FIG. 15(a).
  • the threaded portion 12b is provided on the entire surface of the screw head 12a near the threaded portion 12b, in the case of a countersunk screw, there is no portion corresponding to the head bearing surface 12d of the hexagonal screw.
  • the countersunk screw has a shape in which the screw head 12a is constricted toward the threaded portion 12b. Therefore, when the bell mouth fixing screw 12 is a countersunk screw, there is no portion corresponding to the head bearing surface 12d of the hexagonal screw, so even if the bell mouth fixing screw 12 is tightened, the surface of the fan casing 7 does not reach the surface. On the other hand, the surface pressure from the bell mouth fixing screw 12 is not applied. Therefore, when countersunk screws are used in the rear fan casing 9, the bell mouth portion 11 is not completely fixed on the rear fan casing 9 side. Therefore, when the bell mouth fixing screw 12 is a countersunk screw, the bell mouth portion 11 can be slid in the circumferential direction without loosening the bell mouth fixing screw 12 .
  • the bell mouth fixing screws 12 in the rear fan casing 9 are made of countersunk screws, and the bell mouth fixing screws 12 in the front fan casing 10 are made of hexagonal screws.
  • the bell mouth portion 11 can be slid and removed by loosening only the hexagonal screw provided on the front side fan casing 10 side.
  • the number of man-hours for loosening the bell mouth fixing screw 12 is reduced, and maintainability is further improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
PCT/JP2022/004162 2022-02-03 2022-02-03 空気調和機 WO2023148864A1 (ja)

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Publication number Priority date Publication date Assignee Title
JPH11287492A (ja) * 1998-04-02 1999-10-19 Matsushita Seiko Co Ltd 熱交換換気装置
JP2016114332A (ja) * 2014-12-17 2016-06-23 ダイキン工業株式会社 上下分割型ファンハウジング
WO2017134720A1 (ja) * 2016-02-01 2017-08-10 三菱電機株式会社 空気調和装置
WO2020170423A1 (ja) * 2019-02-22 2020-08-27 三菱電機株式会社 室内機および空気調和装置
CN211781475U (zh) * 2019-12-27 2020-10-27 宁波奥克斯电气股份有限公司 一种离心风机、新风组件及空调器

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JPS63208700A (ja) * 1987-02-23 1988-08-30 Matsushita Electric Ind Co Ltd 送風装置
JP4049054B2 (ja) * 2003-08-27 2008-02-20 ダイキン工業株式会社 遠心送風機のスクロールケーシング、それを備えた遠心送風機、及び空気調和装置の室内ユニット
EP1517044A1 (en) * 2003-09-22 2005-03-23 AERMEC S.p.A. A volute casing for fans for use in fan convectors
WO2017077595A1 (ja) * 2015-11-04 2017-05-11 三菱電機株式会社 ファンケーシング
JP7459258B2 (ja) * 2020-08-04 2024-04-01 三菱電機株式会社 空気調和機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11287492A (ja) * 1998-04-02 1999-10-19 Matsushita Seiko Co Ltd 熱交換換気装置
JP2016114332A (ja) * 2014-12-17 2016-06-23 ダイキン工業株式会社 上下分割型ファンハウジング
WO2017134720A1 (ja) * 2016-02-01 2017-08-10 三菱電機株式会社 空気調和装置
WO2020170423A1 (ja) * 2019-02-22 2020-08-27 三菱電機株式会社 室内機および空気調和装置
CN211781475U (zh) * 2019-12-27 2020-10-27 宁波奥克斯电气股份有限公司 一种离心风机、新风组件及空调器

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