WO2024180716A1 - 空気調和機 - Google Patents

空気調和機 Download PDF

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Publication number
WO2024180716A1
WO2024180716A1 PCT/JP2023/007551 JP2023007551W WO2024180716A1 WO 2024180716 A1 WO2024180716 A1 WO 2024180716A1 JP 2023007551 W JP2023007551 W JP 2023007551W WO 2024180716 A1 WO2024180716 A1 WO 2024180716A1
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WO
WIPO (PCT)
Prior art keywords
control box
terminal block
air conditioner
housing
block mounting
Prior art date
Application number
PCT/JP2023/007551
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
卓也 村上
雄介 山内
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 JP2025503507A priority Critical patent/JPWO2024180716A1/ja
Priority to PCT/JP2023/007551 priority patent/WO2024180716A1/ja
Publication of WO2024180716A1 publication Critical patent/WO2024180716A1/ja

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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
    • F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/20—Sunlight

Definitions

  • This disclosure relates to air conditioners, and in particular to the structure of an air conditioner having a control box.
  • Patent Document 1 discloses a configuration in which a terminal block mounting section for mounting a terminal block to the control box is removably fixed to the control box. With the configuration of Patent Document 1, after the terminal block mounting section is removed from the control box, the control box can be pulled out forward.
  • Patent Document 1 allows easy access to the electrical components housed in the control box, but the terminal block mounting section that is removed from the control box must be supported by the worker, which does not provide good workability during maintenance.
  • This disclosure has been made to solve the problems described above, and provides an air conditioner that improves workability during maintenance.
  • the air conditioner of the present disclosure comprises a housing that houses a heat exchanger and a blower inside, a control box that is housed inside the housing and to which a first wiring inside the housing is connected, a terminal block mounting part that is attached to a terminal block that is connected to the first wiring and a second wiring outside the housing and is removably fixed to the control box, and a support part that is removably fixed to the terminal block mounting part and supports the terminal block mounting part when removed, the support part having a first part that is fixed to the terminal block mounting part removed from the control box, and a second part that is located opposite to the first part and is fixed to the housing.
  • the removed terminal block mounting portion is supported by a support component having a first portion that is fixed to the removed terminal block mounting portion and a second portion that is fixed to the housing. This eliminates the need for the worker to support the terminal block mounting portion, improving workability during maintenance.
  • FIG. 1 is a circuit diagram showing an air conditioner according to an embodiment of the present invention.
  • FIG. 2 is a perspective view showing the indoor unit according to the present embodiment.
  • FIG. 2 is a perspective view showing the indoor unit according to the present embodiment with the front panel removed.
  • FIG. 2 is a perspective view showing a secondary side region of the heat exchanger according to the embodiment.
  • FIG. 2 is a perspective view showing a control box according to the present embodiment.
  • FIG. 2 is a perspective view showing the control box according to the present embodiment with the cover removed.
  • FIG. 2 is an enlarged perspective view of the control box according to the embodiment.
  • FIG. 2 is a perspective view showing a state in which a control box is pulled out in the indoor unit according to the present embodiment.
  • FIG. 2 is a perspective view showing a state in which the left side panel is open in the indoor unit according to the present embodiment.
  • FIG. 2 is a perspective view of a support component according to the present embodiment.
  • 1 is a perspective view showing a state in which a support component according to the present embodiment is fixed to a terminal block mounting portion;
  • 1 is a perspective view showing a state in which a terminal block mounting portion is supported by a support component according to the embodiment of the present invention;
  • FIG. 1 is a side view showing a state in which the terminal block mounting portion according to the present embodiment is inverted.
  • FIG. 1 is a transparent perspective view showing a state in which a terminal block mounting portion according to the present embodiment is supported by a support component.
  • FIG. 1 is a schematic diagram showing a state in which the terminal block mounting portion according to the present embodiment is supported by a support component, viewed in a horizontal direction of the terminal block mounting portion; 1 is a perspective view showing a state in which a terminal block mounting portion according to the present embodiment is supported by a support component, as viewed obliquely from above.
  • FIG. 2 is a perspective view showing a left side panel in an open state of the control box according to the present embodiment.
  • FIG. FIG. 2 is a perspective view showing a front panel of the left side panel according to the present embodiment.
  • FIG. 2 is a perspective view showing a rear panel of the left side panel according to the present embodiment.
  • FIG. 2 is a partially enlarged perspective view of a left side panel according to the embodiment.
  • Embodiment Fig. 1 is a circuit diagram showing an air conditioner 1 according to the present embodiment.
  • the air conditioner 1 is a device that adjusts the air in a space to be air-conditioned, and as shown in Fig. 1, is equipped with an outdoor unit 2 and an indoor unit 3.
  • the outdoor unit 2 is equipped with, for example, a compressor 6, a flow path switching device 7, an outdoor heat exchanger 8, an outdoor blower 9, and an expansion section 10.
  • the indoor unit 3 is equipped with, for example, a heat exchanger 11, a blower 12, and a control box 13.
  • the refrigerant circuit 4 is formed by connecting the compressor 6, the flow path switching device 7, the outdoor heat exchanger 8, the expansion section 10, and the heat exchanger 11 with the refrigerant piping 5.
  • the compressor 6 draws in refrigerant in a low-temperature and low-pressure state, compresses the drawn refrigerant, and discharges it as refrigerant in a high-temperature and high-pressure state.
  • the compressor 6 is, for example, a capacity-controllable inverter compressor.
  • the flow path switching device 7 switches the direction in which the refrigerant flows in the refrigerant circuit 4, and is, for example, a four-way valve.
  • the outdoor heat exchanger 8 exchanges heat between, for example, outdoor air and the refrigerant.
  • the outdoor heat exchanger 8 acts as a condenser during cooling operation and as an evaporator during heating operation.
  • the expansion section 10 is a pressure reducing valve or an expansion valve that reduces the pressure of the refrigerant and expands it.
  • the expansion section 10 is, for example, an electronic expansion valve whose opening is adjustable.
  • the heat exchanger 11 exchanges heat between, for example, indoor air and a refrigerant.
  • the heat exchanger 11 acts as an evaporator during cooling operation and as a condenser during heating operation.
  • the blower 12 is a device that sends indoor air to the heat exchanger 11.
  • cooling operation the operation modes of the air conditioner 1 will be described.
  • the cooling operation the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature, high-pressure gas state.
  • the high-temperature, high-pressure gas state refrigerant discharged from the compressor 6 passes through the flow switching device 7 and flows into the outdoor heat exchanger 8 acting as a condenser, where it is heat-exchanged with outdoor air sent by the outdoor blower 9, condensing and liquefying.
  • the condensed liquid state refrigerant flows into the expansion section 10, where it expands and is decompressed to become a low-temperature, low-pressure gas-liquid two-phase refrigerant.
  • the gas-liquid two-phase refrigerant then flows into the heat exchanger 11 acting as an evaporator, where it is heat-exchanged with indoor air sent by the blower 12, evaporating and gasifying. At this time, the indoor air is cooled, and cooling is performed in the room.
  • the evaporated refrigerant in a low-temperature, low-pressure gas state passes through the flow switching device 7 and is sucked into the compressor 6 .
  • the heating operation In the heating operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature, high-pressure gas state.
  • the high-temperature, high-pressure gas state refrigerant discharged from the compressor 6 passes through the flow path switching device 7 and flows into the heat exchanger 11 acting as a condenser, where it is heat exchanged with the indoor air sent by the blower 12, condensed and liquefied. At this time, the indoor air is warmed, and heating is performed in the room.
  • the condensed liquid state refrigerant flows into the expansion section 10, where it is expanded and decompressed to become a low-temperature, low-pressure gas-liquid two-phase refrigerant.
  • the gas-liquid two-phase refrigerant then flows into the exterior heat exchanger 8 acting as an evaporator, where it is heat exchanged with the outdoor air sent by the exterior blower 9, evaporating and gasifying.
  • the evaporated low-temperature, low-pressure gas state refrigerant passes through the flow path switching device 7 and is sucked into the compressor 6.
  • the air conditioner 1 does not have to have a flow path switching device 7. In this case, the air conditioner 1 becomes a dedicated cooling or heating unit.
  • FIG. 2 is a perspective view showing the indoor unit 3 according to this embodiment
  • Fig. 3 is a perspective view showing the indoor unit 3 according to this embodiment with the front plate 21 removed.
  • the indoor unit 3 includes a housing 20 constituting an outer shell, a heat exchanger 11, a blower 12, a drain pan 24 for collecting condensed water from the heat exchanger 11, and a control box 13.
  • the indoor unit 3 takes in air from an intake port 21a formed in the front plate 21 of the housing 20 in the direction shown by the white arrow in Figs. 2 and 3.
  • the heat exchanger 11 is disposed inside the intake port 21a.
  • an air passage is formed from the intake port 21a formed in the front plate 21 to the outlet port 23a formed in the top plate 23.
  • the air taken into the housing 20 passes through the heat exchanger 11 and is conditioned, and is blown out from the outlet port 23a formed in the top plate 23 of the housing 20 in the direction of the white arrow in FIG. 3.
  • Both sides of the housing 20 are side panels 22, and the rear of the housing 20 is a rear panel 25.
  • the side of the housing 20 where the front plate 21 is located is called the front side
  • the side facing the front plate 21 is called the rear side.
  • the left and right sides of the housing 20 correspond to the left and right when the housing 20 is viewed from the front plate 21.
  • the x direction which is the positive direction of the x axis, is the right, and the opposite direction along the x axis is the left.
  • the direction parallel to the plane defined by the xz axes is the horizontal direction, and the y direction is the up direction.
  • the z direction is called the first direction.
  • the heat exchanger 11 is disposed on the rear side of the intake port 21a when viewed from the side where the front panel 21 of the housing 20 is disposed.
  • the blower 12 includes two blowers 12, and is disposed above the heat exchanger 11, and is located between the outlet 23a and the heat exchanger 11.
  • the blower 12 has a fan 12b (see FIG. 4) and a motor 12c (see FIG. 4) in the fan casing 12a, and the motor 12c is inverter controlled to drive the fan 12b.
  • the air flowing in from the intake port 21a passes through the heat exchanger 11 disposed at an incline inside the housing 20 and flows upward inside the housing 20.
  • the air that has passed through the heat exchanger 11 flows into the inside of the fan casing 12a of the blower 12, and is blown out from the outlet 23a by the fan 12b.
  • the drain pan 24 is disposed so as to be able to collect drain water flowing down below the heat exchanger 11 disposed at an incline inside the housing 20.
  • fan 12b is a sirocco fan.
  • FIG. 4 is a perspective view showing the secondary side region of the heat exchanger 11 according to this embodiment.
  • the secondary side region of the heat exchanger 11 means the region inside the housing 20 where air that has passed through the heat exchanger 11 exists.
  • the primary side region of the heat exchanger 11 means the region where air exists before passing through the heat exchanger 11. In other words, the primary side region is the region upstream of the heat exchanger 11 in the air passage inside the housing 20.
  • the secondary side region is the region downstream of the heat exchanger 11 in the air passage inside the housing 20.
  • the motor 12c of the blower 12 In the secondary side area of the heat exchanger 11, the motor 12c of the blower 12, the fan 12b directly connected to the motor 12c, and the fan casing 12a that covers the periphery of the fan 12b and is fixed to the top plate 23 are installed.
  • two blowers 12 are arranged in the x direction.
  • the control box 13 is arranged in line with the blowers 12 in the horizontal direction of the blowers 12, i.e., along the x axis. Since the control box 13 is arranged to the side of the blower 12, when removing the front plate 21 to perform maintenance around the blower 12, it is not necessary to remove the control box 13 from the air conditioner 1, improving the workability of maintenance.
  • the fan casing 12a is configured to be detachable in the front-rear direction of the air conditioner 1, allowing maintenance such as cleaning of the internal fan 12b.
  • the front-rear direction of the air conditioner 1 is the direction along the z-axis shown in FIG. 2.
  • a drain pan 24 is disposed in the primary side area of the heat exchanger 11.
  • the heat exchanger 11 and the drain pan 24 are prone to adhesion of dust or dirt due to condensed water. Therefore, the primary side area of the heat exchanger 11 is frequently cleaned. If the control box 13 is disposed above the drain pan 24 in the primary side area of the heat exchanger 11 in the indoor unit 3, the control box 13 will hinder the cleaning of the heat exchanger 11 and the drain pan 24, making the cleaning work complicated. In addition, if a large amount of cleaning water is applied to the control box 13 during the cleaning work, the water will enter the inside of the control box 13. This will cause a breakdown of the air conditioner 1, so it is necessary to protect the control box 13 during the cleaning work.
  • the control box 13 in this embodiment is disposed in the secondary side area rather than the primary side area where cleaning is frequent, making it easier to perform maintenance work on the air conditioner 1.
  • the control box 13 is disposed in the secondary side area, making it possible to increase the cooling efficiency.
  • the area around the control box 13 is designed to be free of protrusions, which helps prevent professional cleaners from getting injured during maintenance work on the secondary side of the heat exchanger 11, which is the cleaning area.
  • FIG. 5 is a perspective view showing the control box 13 according to this embodiment
  • FIG. 6 is a perspective view showing the control box 13 according to this embodiment with the cover 31 removed.
  • the control box 13 is L-shaped when viewed from the top surface side of the indoor unit 3.
  • the control box 13 is L-shaped, and the front area in the z direction is wider in the x direction than the back area in the z direction. Therefore, in the control box 13, boards that are operated at the site where the air conditioner 1 is installed are arranged at the front side of the control box 13, and boards that are not operated at the site are arranged at the back side.
  • the terminal block 35 is arranged in the front area of the control box 13 in the z direction. To the terminal block 35, a first wire 351 that connects to each board and a second wire 352 (see FIG. 13) that connects to the outside of the control box 13 are connected.
  • a heat sink 33 is installed on the side surface 32 of the control box 13 facing the blower 12. Since the heat sink 33 is installed on the side surface 32 close to the blower 12, a part of the air flowing toward the blower 12 can be made to flow to the heat sink 33. This allows the inverter board (not shown) installed inside the control box 13 to be cooled. In addition, the heat sink 33 can also be washed when cleaning the periphery of the blower 12. This prevents the cooling effect from decreasing due to the accumulation of dirt on the heat sink 33.
  • the box body 30 is a box body made of, for example, a combination of sheet metal members. The box body 30 has gaps around the heat sink 33 filled with silicon caulking to prevent water from entering. This allows the heat sink 33 installed on the outside of the box body 30 made of a combination of sheet metal members to be washed. The box body 30 has an opening on the first direction side.
  • a slide rail 34 that constitutes a sliding structure is provided at the bottom of the control box 13.
  • the sliding structure allows the control box 13 to slide in the front-to-rear direction of the housing 20, i.e., along the z-axis.
  • the terminal block mounting portion 36 is fitted inside the control box 13.
  • the terminal block mounting portion 36 is fixed to the box body 30 with screws and is configured to be freely attached and detached from the box body 30.
  • the terminal block mounting portion 36 is a plate-shaped member to which the terminal block 35 is attached.
  • the terminal block 35 connects a first wiring 351 extending from the boards inside the control box 13 to a second wiring 352 outside the housing 20, which is the on-site wiring.
  • the terminal block mounting portion 36 is provided with multiple wiring inlets 38 that protrude downward.
  • the second wiring 352 is inserted into the wiring inlets 38 and taken into the inside of the control box 13.
  • FIG. 7 is an enlarged perspective view of the control box 13 according to this embodiment.
  • a support part 40 is fixed to the control box 13.
  • the support part 40 is a part for fixing and supporting the terminal block mounting part 36 to the housing 20 when the terminal block mounting part 36 is removed from the box body 30 of the control box 13.
  • the support part 40 is removably fixed to the control box 13.
  • the support part 40 is fastened together with the terminal block mounting part 36 by a first screw 41 and fixed to the control box 13.
  • the support part 40 is fixed, for example, so as to straddle the left side panel 37 and the terminal block mounting part 36.
  • FIG 8 is a perspective view showing the indoor unit 3 according to this embodiment with the control box 13 pulled out. As shown in Figure 8, the control box 13 can be pulled out in the forward direction of the housing 20 with the front panel 21 removed.
  • control box 13 By making the control box 13 slidable in the front-to-rear direction of the housing 20, workers can perform maintenance on the circuit board without removing the control box 13 from the indoor unit 3.
  • the front panel 21 of the housing 20 is removed to view the inside of the housing 20, it is possible to clean the area hidden by the control box 13.
  • the control box 13 when the control box 13 is pulled out towards the front in the z direction, the control box 13 can be fixed in place by tightening the screws (not shown) of the slide rail 34 that were loosened. This eliminates the need to prepare a separate stand or the like to fix the control box 13 during maintenance.
  • FIG. 9 is a perspective view showing the indoor unit 3 according to this embodiment with the left side panel 37 open.
  • the left side panel 37 is screwed to the box body 30, and when the left side panel 37 is removed, the control box 13 is in an open state.
  • a sealant (not shown) is attached to the mating surface between the terminal block mounting portion 36 of the control box 13 and the box body 30, the mating surface between the left side panel 37 and the box body 30, and the mating surface between the cover 31 and the box body 30.
  • the sealant prevents water from entering the inside of the control box 13 even if water is splashed on the control box 13 when the blower 12 is washed.
  • a rubber bush shaped to encase the wiring is arranged in the wiring inlet 38 of the control box 13. The rubber bushing with the wiring passing through it is bound from the outside with a binding material to prevent water, dust, etc. from entering the control box 13 through the wiring inlet 38.
  • the support part 40 is a plate-like member composed of a first part 42, a second part 43, and a connecting part 44 connecting the first part 42 and the second part 43.
  • the connecting part 44 extends in a direction intersecting the first part 42 and the second part 43, for example, in the y direction.
  • the first part 42 and the second part 43 extend parallel to each other and in opposite directions, for example, in the x direction, from both edges of the connecting part 44.
  • the support part 40 has a Z-shaped cross section formed by the first part 42, the second part 43, and the connecting part 44.
  • the support part 40 is formed, for example, by bending a rectangular metal plate.
  • the first part 42 has a first daruma hole 45 formed therein.
  • the second part 43 has a second daruma hole 46 formed therein.
  • the first pot hole 45 is a hole where a small diameter hole and a large diameter hole are connected in the x direction when the first part 42 extends, for example, from the connecting part 44 in the z direction.
  • the second pot hole 46 is a hole where a small diameter hole and a large diameter hole are connected in the x direction when the second part 43 extends, for example, from the connecting part 44 in the z direction.
  • FIG. 11 is a perspective view showing the state in which the support part 40 according to this embodiment is fixed to the terminal block mounting part 36.
  • FIG. 12 is a perspective view showing the state in which the terminal block mounting part 36 is supported by the support part 40 according to this embodiment. The procedure by which the terminal block mounting part 36 is supported by the support part 40 will be explained using FIG. 11 and FIG. 12. The terminal block mounting part 36 is removed from the control box 13 before the control box 13 is pulled out during maintenance work.
  • the support part 40 is first removed from the control box 13. Specifically, the first screw 41 that secures the support part 40 to the box body 30 of the control box 13 is released from its screwed engagement. The first screw 41 is part of the fixing screw that secures the terminal block mounting portion 36 to the box body 30. Next, the first screw 41 is temporarily fastened to the front end of the terminal block mounting portion 36.
  • the first pot hole 45 of the first portion 42 is hooked onto the first screw 41, and the support part 40 is temporarily fixed to the terminal block mounting part 36. Then, the first screw 41 is tightened, and the support part 40 is fixed to the terminal block mounting part 36.
  • the fixing screws that fix the terminal block mounting portion 36 to the box body 30 are released, and the terminal block mounting portion 36 is removed from the box body 30 together with the support part 40.
  • two fixing screws are provided on the rear side of the terminal block mounting portion 36 on the box body 30.
  • the second slot 46 of the second part 43 of the support part 40 is hooked onto the second screw 47.
  • the second screw 47 is temporarily attached to the frame that constitutes the housing 20.
  • the second screw 47 is located below the slide rail 34 of the control box 13.
  • the support part 40 is temporarily fixed to the housing 20. Specifically, the terminal block mounting part 36 is inverted upside down, so that the support part 40 is positioned on the housing 20 side relative to the terminal block mounting part 36 and temporarily fixed. Next, the second screw 47 is tightened, and the terminal block mounting part 36 is fixed to the housing 20 in an inverted state by the support part 40.
  • the terminal block mounting portion 36 removed from the box body 30 is supported on the housing 20 by the support component 40.
  • the terminal block mounting portion 36 removed from the box body 30 will not fall and does not need to be held by the worker, improving the workability of maintenance.
  • the support component 40 for holding the terminal block mounting portion 36 is not structured to protrude into the cleaning area outside the control box 13, preventing injury to workers during cleaning work.
  • Figure 13 is a side view showing the terminal block mounting portion 36 in this embodiment in an inverted state.
  • the terminal block mounting portion 36 is rotated and inverted in the direction of arrow A, that is, in the direction in which the upper part is tilted forward.
  • the control box 13 is then pulled out in the direction of the outlined arrow B.
  • the terminal block mounting portion 36 is removed from the pull-out path of the control box 13 and is fixed in a position where it does not interfere with the pull-out operation of the control box 13.
  • the second wiring 352 which is the on-site wiring, is connected to the terminal block mounting part 36. If the terminal block mounting part 36 is not inverted, the on-site wiring cannot be moved freely after it is removed unless there is excess length, and this would impede the pull-out process. By inverting the terminal block mounting part 36 downward, the excess length of the on-site wiring is shortened, and the pull-out process of the control box 13 can be performed easily.
  • the second wiring 352 extends below the control box 13.
  • the second wiring 352, which is the on-site wiring, passes below the path along which the control box 13 is pulled out, so that the operation of pulling out the control box 13 is not hindered by the second wiring 352.
  • FIG. 14 is a see-through perspective view showing the state in which the terminal block mounting portion 36 according to this embodiment is supported by the support part 40.
  • FIG. 15 is a schematic diagram showing the state in which the terminal block mounting portion 36 according to this embodiment is supported by the support part 40, viewed horizontally from the terminal block mounting portion 36.
  • FIG. 16 is a perspective view showing the state in which the terminal block mounting portion 36 according to this embodiment is supported by the support part 40, viewed diagonally from above.
  • the support part 40 has a Z-shape.
  • the first screw 41 is inserted into the first hole 45 from the connecting part 44 side and fastened. Therefore, when the first screw 41 is hooked into the first hole 45, the first screw 41 that has been temporarily fastened by the worker can be hooked while being visually confirmed from above, and after the first screw 41 is hooked, it can be screwed from above with a screwdriver, making the work easy to perform.
  • the second screw 47 is inserted into the second hole 46 from the connecting portion 44 side and fastened. After the terminal block mounting portion 36 is inverted, when the second screw 47 is hooked into the second hole 46, the worker can hook the second screw 47 while visually checking the temporarily fastened second screw 47 from above. Then, after the second screw 47 is hooked, it can be screwed in from above with a screwdriver.
  • the support part 40 has a Z-shape, the direction of travel of the first screw 41 and the direction of travel of the second screw 47 are opposite to each other, ensuring visibility during maintenance and improving workability.
  • FIG 17 is a perspective view showing the left side panel 37 in an open state in the control box 13 according to this embodiment.
  • the left side panel 37 is composed of a front panel 71 and a rear panel 72.
  • the front panel 71 is removable.
  • the front panel 71 is fixed to the rear panel 72 by screws, and is also fixed to the top panel and bottom panel (not shown) of the box body 30.
  • the front panel 71 can be removed from the box body 30 by releasing the screws from outside the box body 30.
  • the front end is rotated 90 degrees around the rear end to open the panel.
  • FIG. 18 is a perspective view showing the front panel 71 of the left side panel 37 according to this embodiment.
  • FIG. 19 is a perspective view showing the rear panel 72 of the left side panel 37 according to this embodiment.
  • FIG. 20 is a partially enlarged perspective view of the left side panel 37 according to this embodiment. As shown in FIGS. 18, 19, and 20, a protrusion 711 is formed on the front panel 71, and a bent portion 722 is formed on the rear panel 72.
  • the protrusions 711 of the front panel 71 and the bent portions 722 of the rear panel 72 are structured to engage with each other.
  • the protrusions 711 hook onto the bent portions 722 of the rear panel 72, and the front panel 71 is maintained in the open state.
  • the protrusion 711 is provided on one of the longitudinally extending end faces of the front panel 71 that is located on the rear panel 72 side.
  • the protrusion 711 is a portion that extends from the end face of the front panel 71 in the planar direction, for example in a rectangular shape.
  • the protrusion 711 has an inverted U-shaped notch 71a with an opening facing downward.
  • the number of protrusions 711 is not particularly limited, and for example, two may be formed in the vertical direction.
  • the bent portion 722 is provided on the end surface of the rear panel 72 that is located on the front panel 71 side among the end surfaces extending in the longitudinal direction.
  • a stepped screw 72a is attached to the bent portion 722 so as to pass through the bent portion 722.
  • the notch 71a of the protrusion 711 of the stepped screw 72a catches on the bent portion 722, thereby engaging the front panel 71 with the rear panel 72 and maintaining the front panel 71 in the open state.
  • the number of bent portions 722 is not particularly limited, like the protrusions 711, but it is preferable that it is the same as the number of protrusions 711.
  • the bent portion 722 and the protrusion 711 are formed at different positions in the height direction. That is, the protrusion 711 is formed at a position of distance D1 from the upper end of the front panel 71, and the bent portion 722 is formed at a position of distance D2 from the upper end of the rear panel 72, and the distance D1 is smaller than the distance D2.
  • the bent portion 722 is located below the protrusion 711. Therefore, the front panel 71 removed from the box body 30 is caught by the rear panel 72 at a position lower than the height position in the closed state and is maintained in the open state.
  • the upper part of the control box 13 has a roof, even if the front panel 71 is rotated at the same height position as the rear panel 72, it interferes with the roof and cannot rotate. Since the protrusion 711 is formed at a position lower than the bent portion 722, the front panel 71 rotates without being interfered with by the roof of the control box 13, and the open state of the front panel 71 is maintained.
  • the bent portion 722 has a shape in which the portion extending from the end face is bent toward the inside of the control box 13 and in a direction intersecting the surface direction of the rear panel 72. Furthermore, the protrusion 711 extends along the surface direction of the end face of the front panel 71. Therefore, neither the protrusion 711 nor the bent portion 722 is a protrusion structure that protrudes into the cleaning area outside the control box 13, which prevents injury to the worker during work.
  • the terminal block mounting portion 36 removed from the control box 13 is supported by the support component 40 having the first portion 42 and the second portion 43 and fixed to the housing 20. Therefore, when the terminal block is removed during maintenance, the worker does not need to support the removed terminal block mounting portion 36 while working, improving workability during maintenance.
  • the support part 40 is also fastened to the control box 13 by the first screw 41 that fastens the terminal block mounting portion 36 to the control box 13.
  • the support part 40 can be removed from the control box 13 by releasing the fastening of the first screw 41, so there is no need to perform an additional task to remove the support part 40.
  • the terminal block mounting portion 36 is fixed upside down to the housing 20, the wiring extending from the terminal block 35 is not pulled excessively, and there is no need to have excess wiring length.
  • the second wiring 352 extends below the control box 13, so that the on-site wiring passes below the path along which the control box 13 is pulled out and does not interfere with the operation of pulling out the control box 13.
  • the direction of travel of the second screw 47 is parallel to and opposite to the direction of travel of the first screw 41. Therefore, when fixing the first part 42 to the terminal block mounting part 36, the first screw 41 can be screwed in with a screwdriver while being visually checked from above. Furthermore, after the terminal block mounting part 36 is inverted, when fixing the second part 43 to the housing 20, the second screw 47 can also be screwed in with a screwdriver while being visually checked from above.
  • the terminal block mounting part 36 can be temporarily fixed to the housing 20, so that the terminal block mounting part 36 can be prevented from falling even if the terminal block mounting part 36 is released from the hand during work.
  • the support part 40 has a Z-shape, when fixing the first part 42 to the terminal block mounting part 36 and when fixing the second part 43 to the housing 20, the first screw 41 and the second screw 47 can be screwed in with a screwdriver while being visually checked from above.
  • control box 13 has a sliding structure that allows it to move horizontally, so it can be pulled out of the housing 20 for easy maintenance.
  • the terminal block mounting portion 36 when the terminal block mounting portion 36 is removed from the control box 13, it is fixed at a position lower than the control box 13, so the path for pulling out the control box 13 is not obstructed, making maintenance easier.
  • the left side panel 37 also has an openable front panel 71 and a rear panel 72.
  • the front panel 71 When the front panel 71 is in the open position, the protrusions 711 of the front panel 71 engage with the bent portions 722 of the rear panel 72, and the front panel 71 is held in the open position.
  • the front panel 71 By holding the front panel 71 in the open position, there is no need to remove the relay connector from the front panel 71, and the worker does not need to keep the front panel 71 open. This makes it easier to perform maintenance and inspection of the inside of the board, or maintenance such as replacing the board, and improves workability.
  • the protrusion 711 is located above the bent portion 722
  • the front panel 71 is held in the open state below the rear panel 72, so even if there is a roof on top of the control box 13, interference between the front panel 71 and the roof of the control box 13 can be prevented.
  • bent portion 722 is bent inside the control box 13 in a direction that intersects with the surface of the rear panel 72, so no protruding structure is provided in the cleaning area of the air conditioner 1, ensuring the safety of workers.
  • the front panel 71 can be held in the open state by inserting the shoulder screw 72a of the bent portion 722 into the notch 71a of the protrusion 711, facilitating maintenance such as inspection and maintenance of the inside of the board or replacement of the board.
  • Air conditioner 1 Air conditioner, 2 Outdoor unit, 3 Indoor unit, 4 Refrigerant circuit, 5 Refrigerant piping, 6 Compressor, 7 Flow switching device, 8 Outdoor heat exchanger, 9 Outdoor blower, 10 Expansion section, 11 Heat exchanger, 12 Blower, 12a Fan casing, 12b Fan, 12c Motor, 13 Control box, 20 Housing, 21 Front panel, 21a Intake port, 22 Side panel, 23 Top panel, 23a Outlet, 24 Drain pan, 25 Rear panel, 30 Box body, 31 Cover, 32 side, 33 heat sink, 34 slide rail, 35 terminal block, 36 terminal block mounting section, 37 left side panel, 38 wiring inlet, 40 support part, 41 first screw, 42 first section, 43 second section, 44 connecting section, 45 first oval hole, 46 second oval hole, 47 second screw, 71 front panel, 71a notch, 72 rear panel, 72a shoulder screw, 351 first wiring, 352 second wiring, 711 protrusion, 722 bent section.

Landscapes

  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
PCT/JP2023/007551 2023-03-01 2023-03-01 空気調和機 WO2024180716A1 (ja)

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JP2025503507A JPWO2024180716A1 (enrdf_load_stackoverflow) 2023-03-01 2023-03-01
PCT/JP2023/007551 WO2024180716A1 (ja) 2023-03-01 2023-03-01 空気調和機

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232326U (enrdf_load_stackoverflow) * 1975-08-29 1977-03-07
JPH0495218U (enrdf_load_stackoverflow) * 1990-12-28 1992-08-18
JPH06129661A (ja) * 1992-10-14 1994-05-13 Daikin Ind Ltd 室内空気調和機
JPH08226667A (ja) * 1995-02-23 1996-09-03 Daikin Ind Ltd 天井取付形空気調和機
WO2022029891A1 (ja) * 2020-08-04 2022-02-10 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
JPS5232326U (enrdf_load_stackoverflow) * 1975-08-29 1977-03-07
JPH0495218U (enrdf_load_stackoverflow) * 1990-12-28 1992-08-18
JPH06129661A (ja) * 1992-10-14 1994-05-13 Daikin Ind Ltd 室内空気調和機
JPH08226667A (ja) * 1995-02-23 1996-09-03 Daikin Ind Ltd 天井取付形空気調和機
WO2022029891A1 (ja) * 2020-08-04 2022-02-10 三菱電機株式会社 空気調和機

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