WO2022254479A1

WO2022254479A1 - Indoor unit and air conditioner

Info

Publication number: WO2022254479A1
Application number: PCT/JP2021/020593
Authority: WO
Inventors: 弘貴中島; 悠太相羽; 武志川村
Original assignee: 三菱電機株式会社
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-12-08

Abstract

One embodiment of an indoor unit according to the present disclosure is an indoor unit of an air conditioner, comprising: an indoor unit body; a plurality of electric dust collectors attached to the indoor unit body; a control board for controlling the plurality of electric dust collectors; a plurality of relay connectors each forming a pair with each of the plurality of electric dust collectors, and to which an electrical wire extending from the electric dust collector forming a pair therewith is electrically connected; and a relay wire electrically connecting the plurality of relay connectors and the control board.

Description

Indoor units and air conditioners

The present disclosure relates to indoor units and air conditioners.

For example, Patent Literature 1 describes an air conditioner provided with a power supply for each of a plurality of charge modules and an air cleaning unit capable of individually applying a voltage to each charge module.

WO2015/056465

In the configuration of the air conditioner of Patent Document 1, power supplies are provided in a one-to-one correspondence with each of the plurality of charging modules. Each power source of the plurality of charging modules is connected to the control board respectively. In this way, when each power supply provided in each of the plurality of charging modules is connected to the control board, there is a risk that the wiring of each power supply is connected to the wrong terminal. Such misconnections are more likely to occur as the number of charging modules and the number of power sources increases.

The present disclosure has been made to solve the above problems, and includes an indoor unit having a structure capable of suppressing erroneous connection of electrical wiring extending from each of a plurality of electrostatic precipitators, and such an indoor unit. An object of the present invention is to provide an air conditioner.

One aspect of the indoor unit according to the present disclosure is an indoor unit of an air conditioner, which includes an indoor unit main body, a plurality of electrostatic precipitators attached to the indoor unit main body, and control for controlling the plurality of electrostatic precipitators. a substrate, a plurality of relay connectors paired with the plurality of electrostatic precipitators and electrically connected to electrical wiring extending from the paired electrostatic precipitators, and electrically connecting the plurality of relay connectors and the control substrate. and a relay wiring connected to the

One aspect of the air conditioner according to the present disclosure includes the above indoor unit and outdoor unit.

According to the present disclosure, in an indoor unit of an air conditioner, it is possible to suppress erroneous connection of electrical wiring extending from each of the plurality of electrostatic precipitators.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows schematic structure of the air conditioner in embodiment. It is a perspective view showing an indoor unit in an embodiment. It is an exploded perspective view showing an indoor unit in an embodiment. It is a sectional view showing a part of indoor unit in an embodiment. It is a perspective view showing an air cleaning device in an embodiment. 1 is a perspective view showing an electrostatic precipitator assembly in an embodiment; FIG. FIG. 4 is a perspective view showing the electrostatic precipitator assembly in the embodiment, showing a state in which the lid of the relay box is opened. FIG. 4 is an exploded perspective view showing the electrostatic precipitator assembly according to the embodiment, showing a state where the cover of the relay box is opened.

Embodiments of the present disclosure will be described below with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical ideas of the present disclosure. In the drawings below, the scale and number of each structure may be different from the scale and number of the actual structure in order to make each configuration easier to understand.

In addition, the drawings show the X-axis, Y-axis, and Z-axis as appropriate. The X-axis indicates one of the horizontal directions. The Y-axis indicates the other horizontal direction. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is called "first horizontal direction X", and the horizontal direction along the Y-axis is called "second horizontal direction Y". The first horizontal direction X, the second horizontal direction Y, and the vertical direction are directions orthogonal to each other. The side of the vertical direction to which the Z-axis arrow points (+Z side) is the upper side, and the side opposite to the side of the vertical direction to which the Z-axis arrow points (-Z side) is the lower side.

Further, in the following description, the side (+X side) in the first horizontal direction X to which the arrow of the X axis points is referred to as "one side in the first horizontal direction". The opposite side (−X side) to the facing side is called the “first horizontal other side”. In addition, the side of the second horizontal direction Y to which the Y-axis arrow points (+Y side) is called "second horizontal direction one side", and the side of the second horizontal direction Y opposite to the side to which the Y-axis arrow points ( −Y side) is called the “second horizontal other side”.

FIG. 1 is a schematic diagram showing a schematic configuration of an air conditioner 100 according to the present embodiment. The air conditioner 100 can adjust indoor air using a refrigeration cycle in which a refrigerant 40 circulates. As shown in FIG. 1 , the air conditioner 100 includes an outdoor unit 10 , an indoor unit 20 and a circulation path section 30 . The outdoor unit 10 is arranged outdoors. The indoor unit 20 is arranged indoors. The outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path section 30 through which the refrigerant 40 circulates.

The air conditioner 100 can adjust the temperature of the indoor air by exchanging heat between the refrigerant 40 flowing in the circulation path section 30 and the indoor air in which the indoor unit 20 is arranged. As the refrigerant 40, for example, a fluorine-based refrigerant or a hydrocarbon-based refrigerant having a low global warming potential (GWP) can be used.

The outdoor unit 10 has an outdoor unit housing 11, a compressor 12, a heat exchanger 13, a flow control valve 14, a blower 15, a four-way valve 16, and an outdoor unit controller 17. A compressor 12 , a heat exchanger 13 , a flow control valve 14 , a blower 15 , a four-way valve 16 , and an outdoor unit controller 17 are housed inside the outdoor unit housing 11 . The outdoor unit control section 17 controls each section of the outdoor unit 10 . The outdoor unit control unit 17 is, for example, a system control unit that controls the entire air conditioner 100 .

The compressor 12 , the heat exchanger 13 , the flow control valve 14 and the four-way valve 16 are provided in a portion of the circulation path section 30 located inside the outdoor unit housing 11 . Compressor 12 , heat exchanger 13 , flow control valve 14 , and four-way valve 16 are connected by a portion of circulation path section 30 located inside outdoor unit housing 11 .

The four-way valve 16 is provided in a portion of the circulation path section 30 that is connected to the discharge side of the compressor 12 . The four-way valve 16 can reverse the direction of the coolant 40 flowing through the circulation path section 30 by switching a part of the circulation path section 30 . When the path connected by the four-way valve 16 is the path indicated by the solid line in the four-way valve 16 in FIG. 1, the refrigerant 40 flows in the circulation path section 30 in the direction indicated by the solid arrow in FIG. On the other hand, when the path connected by the four-way valve 16 is the path indicated by the dashed line in the four-way valve 16 in FIG. 1, the refrigerant 40 flows in the circulation path section 30 in the direction indicated by the dashed arrow in FIG.

The indoor unit 20 includes an indoor unit main body 21. The indoor unit main body 21 has an indoor unit housing 21a, a heat exchanger 22, and a fan 23. A heat exchanger 22 and a blower 23 are housed inside the indoor unit housing 21a. The indoor unit 20 is capable of a cooling operation for cooling the air in the room in which the indoor unit 20 is arranged and a heating operation for warming the air in the room in which the indoor unit 20 is arranged.

When the indoor unit 20 is in cooling operation, the refrigerant 40 flowing through the circulation path portion 30 flows in the direction indicated by the solid line arrow in FIG. That is, when the indoor unit 20 is in a cooling operation, the refrigerant 40 flowing through the circulation path portion 30 flows through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20. in that order back to the compressor 12 . In cooling operation, the heat exchanger 13 inside the outdoor unit 10 functions as a condenser, and the heat exchanger 22 inside the indoor unit 20 functions as an evaporator.

On the other hand, when the indoor unit 20 is operated for heating, the refrigerant 40 flowing through the circulation path portion 30 flows in the direction indicated by the dashed line in FIG. In other words, when the indoor unit 20 is operated for heating, the refrigerant 40 flowing through the circulation path portion 30 flows through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10. in that order back to the compressor 12 . In heating operation, the heat exchanger 13 inside the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 inside the indoor unit 20 functions as a condenser.

Next, the indoor unit 20 of this embodiment will be described in further detail. FIG. 2 is a perspective view showing the indoor unit 20. FIG. FIG. 3 is an exploded perspective view showing the indoor unit 20. FIG. FIG. 4 is a cross-sectional view showing part of the indoor unit 20. As shown in FIG.

As shown in FIGS. 2 to 4, the indoor unit 20 in this embodiment is a ceiling-embedded indoor unit that is installed embedded in the ceiling. The indoor unit main body 21 has a substantially quadrangular prism shape that is flat in the vertical direction. As shown in FIG. 4, the blower 23 arranged inside the indoor unit housing 21a of the indoor unit main body 21 has a motor 23a and an impeller 23b. The impeller 23b is rotated around a rotation axis R extending in the vertical direction by the motor 23a. The blower 23 rotates the impeller 23b by the motor 23a, sucks the air AR from below the impeller 23b, and sends the air to the outside in the radial direction of the impeller 23b. In the indoor unit housing 21a, the heat exchanger 22 is arranged to surround the radially outer side of the impeller 23b. The air AR sent radially outward of the impeller 23 b passes through the heat exchanger 22 .

As shown in FIGS. 2 and 3, the indoor unit 20 includes an air cleaning device 50 attached to the lower side of the indoor unit main body 21, and a decorative panel 24 attached to the lower side of the air cleaning device 50. . The decorative panel 24 is arranged with the air cleaning device 50 sandwiched between the indoor unit main body 21 and the vertical direction. The decorative panel 24 is larger than the indoor unit main body 21 and the air cleaning device 50 when viewed in the vertical direction. The indoor unit body 21 and the air cleaning device 50 are embedded in the ceiling in the room where the indoor unit 20 is installed. The decorative panel 24 is exposed in the room where the indoor unit 20 is installed.

The air cleaning device 50 is a device that cleans the indoor air by removing dust from the indoor air where the indoor unit 20 is installed. The air cleaning device 50 is provided between the indoor unit main body 21 and the decorative panel 24 in the vertical direction. FIG. 5 is a perspective view showing the air cleaning device 50. FIG. As shown in FIG. 5 , the air cleaning device 50 has a frame member 51 , an electrostatic precipitator assembly 60 , a control section 70 and relay wiring 80 .

The frame member 51 has a substantially square frame shape having sides along the first horizontal direction X and the second horizontal direction Y when viewed in the vertical direction. When viewed in the vertical direction, the outer shape of the frame member 51 is the same as the outer shape of the indoor unit main body 21 . The upper surface of the frame member 51 is fixed to the lower surface of the indoor unit body 21 .

The inside of the frame member 51 is a suction port 52 through which indoor air is sucked. A plurality of outlets 53 are provided on the lower surface of the frame member 51 . A pair of side portions extending along the first horizontal direction X and a pair of side portions extending along the second horizontal direction Y of the frame member 51 are provided with two outlets 53 , respectively. The air sucked from the suction port 52 is blown into the room from the blowout port 53 . The suction port 52 and the blowout port 53 open downward. A decorative panel 24 is arranged below the suction port 52 and the blowout port 53. A through hole for passing air is provided in a portion of the decorative panel 24 facing the suction port 52 and the blowout port 53. It is

The electrostatic precipitator assembly 60 is arranged inside the frame member 51, that is, in the suction port 52. FIG. 6 is a perspective view showing the electrostatic precipitator assembly 60. FIG. FIG. 7 is a perspective view showing the electrostatic precipitator assembly 60, showing a state in which a lid portion 63b of a relay box 63, which will be described later, is opened. FIG. 8 is an exploded perspective view showing the electrostatic precipitator assembly 60, showing a state in which the lid portion 63b of the junction box 63 is opened. As shown in FIG. 6 , the electrostatic precipitator assembly 60 has a support member 61 , a plurality of electrostatic precipitators 62 and a junction box 63 . As shown in FIGS. 7 and 8, the electrostatic precipitator assembly 60 has multiple relay connectors 64 and multiple electrical wirings 66 .

The support member 61 is a metal plate member. The plate surface of the support member 61 faces the vertical direction. The support member 61 is composed of, for example, a plurality of members. The support member 61 has a substantially rectangular shape elongated in the first horizontal direction X when viewed in the vertical direction. As shown in FIG. 5, the support member 61 is fixed to the frame member 51. As shown in FIG. Both ends of the support member 61 in the first horizontal direction X are fixed to portions of the inner edge of the suction port 52 located on both sides in the first horizontal direction X, respectively. A through-hole 61 a is provided in a portion of the support member 61 on one side (+X side) in the first horizontal direction to vertically penetrate the support member 61 . As shown in FIG. 8, the through hole 61a is a substantially square hole having sides along the first horizontal direction X and the second horizontal direction Y. As shown in FIG.

The support member 61 is provided with a plurality of arrangement areas 65 in which a plurality of electrostatic precipitators 62 are respectively arranged. The plurality of arrangement regions 65 extend in the first horizontal direction X. As shown in FIG. The plurality of arrangement regions 65 are arranged side by side in the second horizontal direction Y. As shown in FIG. Four arrangement areas 65 are provided in the present embodiment. The arrangement region 65 is provided across the through hole 61a in the first horizontal direction X. As shown in FIG. Each of the arrangement regions 65 is provided with one engaging hole 65a and one fixing portion 65b.

In the present embodiment, the engagement hole 65a is a rectangular hole penetrating through the support member 61 in the vertical direction. The engagement hole 65a is provided in a portion of the support member 61 adjacent to the through hole 61a on the first horizontal direction one side (+X side). Four engaging holes 65a are provided side by side in the second horizontal direction Y. As shown in FIG.

The fixing portion 65b is provided in a portion of the support member 61 adjacent to the through hole 61a on the other side (-X side) in the first horizontal direction. Four fixing portions 65b are provided side by side in the second horizontal direction Y. As shown in FIG. Each fixing portion 65b has two female screw holes 65c.

　As shown in FIGS. 6 and 7, the plurality of electrostatic precipitators 62 are fixed to the lower surface of the support member 61. As shown in FIGS. In this embodiment, the plurality of electric dust collectors 62 are attached to the indoor unit main body 21 via the support member 61 and the frame member 51 . A plurality of electrostatic precipitators 62 are arranged in a plurality of arrangement regions 65 of the support member 61 . Four electric dust collectors 62 are provided in this embodiment. The plurality of electrostatic precipitators 62 are arranged in a row along the second horizontal direction Y. As shown in FIG. The plurality of electrostatic precipitators 62 are of the same type and have the same configuration.

Each of the plurality of electrostatic precipitators 62 extends in the first horizontal direction X. Each of the plurality of electrostatic precipitators 62 is arranged across the through hole 61a in the first horizontal direction X. As shown in FIG. The end of the electrostatic precipitator 62 on the first horizontal one side (+X side) is inserted into the engaging hole 65a from below, and the first horizontal one side (+X side) of the engaging hole 65a on the upper surface of the support member 61 is inserted. side) is hooked from above. As shown in FIG. 8, the end portion of the electrostatic precipitator 62 on the other side in the first horizontal direction (−X side) is fixed to the fixing portion 65b by two bolts 62f. Each of the plurality of electric dust collectors 62 has a dust collection section 62a, a power supply section 62b, and a fixing component 62c.

The dust collecting part 62a extends in the first horizontal direction X. The dust collecting portion 62a is arranged across the through hole 61a in the first horizontal direction X. As shown in FIG. The first horizontal one-side (+X side) end of the dust collector 62a is the first horizontal one-side end of the electrostatic precipitator 62, and is hooked and held by the engagement hole 65a. Part of the air passing through the through hole 61a can pass through the dust collecting portion 62a in the vertical direction.

Although not shown, the dust collecting section 62a is provided with a discharge section that generates discharge with power from the power supply section 62b and an electrode section that generates electrostatic force with power from the power supply section 62b. . The dust collecting portion 62a charges dust in the air passing through the dust collecting portion 62a by the discharge of the discharging portion. The dust collecting portion 62a catches the dust in the air passing through the dust collecting portion 62a by causing the dust charged by the discharge to adhere to the electrode portion by electrostatic force. Also, the discharge generated in the discharge portion of the dust collecting portion 62a can inactivate bacteria, viruses, and the like contained in the air passing through the dust collecting portion 62a. By these, the electric dust collector 62 can purify the air passing through the dust collection part 62a.

The power supply section 62b is connected to the end of the dust collection section 62a on the other side (-X side) in the first horizontal direction. The power source portion 62b extends to the other side in the first horizontal direction from the dust collecting portion 62a. The end portion of the power source portion 62b on the other side in the first horizontal direction is the end portion of the electrostatic precipitator 62 on the other side in the first horizontal direction. An end portion of the dust collection portion 62a on the other first horizontal direction side is arranged so as to overlap with an end portion on the first horizontal direction one side (+X side) of the power source portion 62b.

The power supply section 62b is fixed to the fixing section 65b with two bolts 62f. Each of the two bolts 62f is passed through a through hole provided in the power supply section 62b from below and screwed into a female screw hole 65c provided in the fixing section 65b. One bolt 62f of the two bolts 62f fixes the resin fixing part 62c together with the power supply part 62b to the fixing part 65b. The fixing component 62c is positioned below the power supply section 62b.

Each electric dust collector 62 is provided with one electric wiring 66 . That is, four electrical wirings 66 are provided in this embodiment. The electrical wiring 66 is wiring extending from the electrostatic precipitator 62 . More specifically, the electric wiring 66 extends from the end of the power supply section 62b on the other side in the first horizontal direction (−X side) to the other side in the first horizontal direction. A connector portion 66 a is provided at the tip of the electric wiring 66 . As shown in FIG. 7, the connector portions 66a of the plurality of electrical wirings 66 are connected to the plurality of relay connectors 64, respectively. The connector portion 66 a is detachably connected to the relay connector 64 . The lengths of the electrical wirings 66 are equal to each other. That is, in the present embodiment, the lengths of the electrical wirings 66 extending from the plurality of electrostatic precipitators 62 are equal to each other. In this specification, the phrase "the lengths of the electric wires are equal to each other" is not limited to the case where the lengths of the electric wires are exactly the same, but also includes the case where the lengths of the electric wires are substantially the same.

Each of the plurality of electric dust collectors 62 is individually detachably attached to the support member 61 . In this embodiment, the electrostatic precipitator 62 is removed from the support member 61 by removing the two bolts 62f that fix the electrostatic precipitator 62 to the fixing portion 65b and removing the connector portion 66a of the electrical wiring 66 from the relay connector 64. be able to. Thereby, the plurality of electric dust collectors 62 can be individually removed from the indoor unit 20 .

The relay box 63 is arranged in a direction perpendicular to the direction in which the plurality of electrostatic precipitators 62 are arranged, that is, in the first horizontal direction X. In the present embodiment, the relay box 63 is arranged on the other side (−X side) of the plurality of electrostatic precipitators 62 in the first horizontal direction. The relay box 63 has a substantially rectangular parallelepiped box shape extending in the second horizontal direction Y. As shown in FIG. That is, the relay box 63 extends in the direction in which the plurality of electrostatic precipitators 62 are arranged. The relay box 63 is fixed to the lower surface of the support member 61 at the other end in the first horizontal direction.

The relay box 63 accommodates at least part of the electrical wiring 66, part of the relay wiring 80, and a plurality of relay connectors 64 inside. In the present embodiment, the entire portion of the electrical wiring 66 excluding the end on the side (+X side) connected to the power supply section 62 b is housed inside the junction box 63 . That is, in the present embodiment, a portion of the electrical wiring 66 , that is, the end connected to the power supply section 62 b is located outside the junction box 63 .

The relay box 63 has a base portion 63a fixed to the support member 61, a lid portion 63b connected to the base portion 63a so as to be openable and closable, and a canopy portion 63c provided on the lid portion 63b. 6 shows the closed state of the lid portion 63b, and FIGS. 7 and 8 show the opened state of the lid portion 63b. In the following description of the junction box 63, unless otherwise specified, the relative positional relationship of each part of the junction box 63 is the relative positional relationship when the lid portion 63b is closed.

As shown in FIG. 6, the lid portion 63b covers the base portion 63a from below. The lid portion 63b is fixed to the support member 61 with bolts in the closed state. The lid portion 63b is connected to the base portion 63a via a hinge portion 63d provided at the edge portion of the base portion 63a on the other side (−X side) in the first horizontal direction. The lid portion 63b is rotatable relative to the base portion 63a about an axis extending in the second horizontal direction Y through the hinge portion 63d in a state in which fixing to the support member 61 by bolts is released.

The eaves portion 63c protrudes from the lid portion 63b to one side (+X side) in the first horizontal direction when the lid portion 63b is closed. A plurality of eaves portions 63c are provided at intervals in the second horizontal direction Y. As shown in FIG. The canopy portion 63c covers a portion of the electrical wiring 66 located outside the junction box 63 from below. In other words, the eaves portion 63c is arranged so that the end portion of the electrical wiring 66 on the side (+X side) connected to the power source portion 62b is aligned with the side (+X side) on which the decorative panel 24 is positioned with respect to the air cleaning device 50 in the vertical direction. -Z side).

As shown in FIG. 7 , the plurality of relay connectors 64 are attached to the bottom surface of the base 63 a of the relay box 63 . The plurality of relay connectors 64 are exposed below the air cleaning device 50 when the cover 63b of the relay box 63 is open. The plurality of relay connectors 64 are arranged in a row in the same direction as the direction in which the plurality of electrostatic precipitators 62 are arranged, that is, in the second horizontal direction Y. As shown in FIG.

Each of the plurality of relay connectors 64 is positioned on the first horizontal direction other side (-X side) with respect to each of the plurality of electrostatic precipitators 62 . A plurality of relay connectors 64 are paired with a plurality of electrostatic precipitators 62 respectively. In this embodiment, the electrostatic precipitator 62 and the relay connector 64 arranged side by side in the first horizontal direction X form a pair. In this embodiment, four relay connectors 64 are provided. That is, in the present embodiment, four pairs of electrostatic precipitator 62 and relay connector 64 are provided. Each relay connector 64 is electrically connected to an electrical wiring 66 extending from the paired electrostatic precipitator 62 . In the present embodiment, the electrical wiring 66 is connected to the relay connector 64 from the second horizontal direction other side (-Y side). An electrical wiring 66 is connected to the relay connector 64 while being bent toward the other side in the second horizontal direction.

The distance between the electrostatic precipitator 62 and the relay connector 64 that are paired is shorter than the length of each electrical wiring 66 . On the other hand, in the electrostatic precipitator 62 and the relay connector 64 that do not form a pair, the distance between the electrostatic precipitator 62 and the relay connector 64 is longer than the length of each electrical wiring 66 . That is, the length of the electrical wiring 66 is greater than the distance between the electric dust collector 62 provided with the electric wiring 66 and the relay connector 64 arranged adjacent to the relay connector 64 paired with the electric dust collector 62. is also short. The length of the electrical wiring 66 is set to the minimum required length for connecting the paired electrostatic precipitator 62 and the relay connector 64 .

The control unit 70 controls multiple electrostatic precipitators 62 . As shown in FIG. 5 , the controller 70 is arranged inside the frame member 51 , that is, at the suction port 52 . The control unit 70 is fixed to the edge of the support member 61 of the electrostatic precipitator assembly 60 on the second horizontal direction one side (+Y side). The control unit 70 is arranged side by side in the direction in which the plurality of electric dust collectors 62 are arranged, that is, in the second horizontal direction Y, with respect to the plurality of electric dust collectors 62 . In the present embodiment, the controller 70 is arranged on one side (+Y side) in the second horizontal direction with respect to the plurality of electrostatic precipitators 62 . The control unit 70 extends in the same direction as the direction in which the electrostatic precipitator 62 extends, that is, in the first horizontal direction X. As shown in FIG. The end of the control unit 70 on the first horizontal other side (−X side) is positioned on the second horizontal direction one side of the relay box 63 . The control unit 70 has a control board box 71 and a control board 72 .

The control board box 71 has a substantially rectangular parallelepiped box shape extending in the first horizontal direction X. The control board box 71 accommodates the control board 72 and part of the relay wiring 80 inside. The control board box 71 has a base portion 71a fixed to the support member 61 and a lid portion 71b connected to the base portion 71a so as to be opened and closed. 3 shows a state in which the lid portion 71b is closed, and FIG. 5 shows a state in which the lid portion 71b is opened. The base 71a is box-shaped and opens downward. The lid portion 71b is a plate-like member that closes the opening below the base portion 71a in the closed state. The lid portion 71b is fixed to the base portion 71a with bolts in the closed state. The lid portion 71b is connected to the base portion 71a via a hinge portion 71c provided at the edge portion of the second horizontal direction one side (+Y side) of the base portion 71a. The lid portion 71b is rotatable with respect to the base portion 71a about an axis extending in the first horizontal direction X through the hinge portion 71c in a state in which the fixing to the base portion 71a by the bolt is released.

The control board 72 is fixed to the upper wall of the base 71 a of the control board box 71 . The control board 72 has a substantially rectangular plate shape whose plate surface faces the vertical direction and is elongated in the first horizontal direction X. As shown in FIG. A plurality of electronic components are mounted on the lower surface of the control board 72 . The control board 72 is arranged side by side in the direction in which the plurality of electrostatic precipitators 62 are arranged, that is, in the second horizontal direction Y, with respect to the plurality of electrostatic precipitators 62 . The control board 72 is exposed below the air cleaning device 50 when the lid portion 71b is opened. A relay wiring 80 is electrically connected to the control board 72 .

The relay wiring 80 electrically connects the plurality of relay connectors 64 and the control board 72 . As shown in FIG. 7 , the relay wiring 80 is composed of a plurality of wirings 81 . Each of the plurality of wirings 81 electrically connects each of the plurality of relay connectors 64 and the control board 72 . A plurality of wires 81 extend from each relay connector 64 in the relay box 63 to the second horizontal direction one side (+Y side). A plurality of wires 81 are bundled to form a wire bundle 82 and are pulled out from the junction box 63 to the outside. More specifically, the wiring bundle 82 is pulled out from the relay box 63 to the second horizontal one side through a through portion 63e provided in the wall portion of the relay box 63 on the second horizontal one side.

As shown in FIG. 5, the wiring bundle 82 pulled out from the junction box 63 is bent to the first horizontal direction one side (+X side), and is bent to the first horizontal direction other side (−X side) of the control board box 71. It is inserted inside the control board box 71 through the wall. Inside the control board box 71 , the tip of the wiring bundle 82 is electrically connected to the control board 72 . Thereby, the control board 72 and the plurality of electrostatic precipitators 62 are electrically connected via the relay wiring 80 , the relay connector 64 , and the electric wiring 66 .

The control board 72 sends a signal to the power supply units 62b of the electric dust collectors 62 via the relay wiring 80, the relay connector 64, and the electric wiring 66 in this order based on a signal from the outdoor unit control unit 17, for example. , controls the power supplied from the power supply unit 62b to the dust collection unit 62a. When electric power is supplied from the power supply unit 62b to the discharge unit and the electrode unit (not shown) in the dust collection unit 62a, electric discharge and electrostatic force are generated in the dust collection unit 62a, and the electric dust collector 62 is driven. Thus, the control board 72 controls the multiple electrostatic precipitators 62 . The control board 72 drives the electric dust collector 62 when the blower 23 of the indoor unit 20 is driven, and stops the electric dust collector 62 when the blower 23 is stopped.

As shown in FIG. 4, when the blower 23 of the indoor unit 20 is driven, indoor air AR is sucked into the suction port 52 from below. The air AR sucked into the suction port 52 passes through the air cleaning device 50 and is sucked into the interior of the indoor unit body 21 . The air AR drawn into the interior of the indoor unit main body 21 passes through the heat exchanger 22, is discharged to the outside of the indoor unit main body 21, and is blown into the room from the outlet 53. Here, the air AR that has passed through the electric dust collector 62 of the air cleaning device 50 after being sucked from the suction port 52 is blown out from the blowout port 53 into the room after the dust is removed and cleaned. Therefore, by continuing to operate the blower 23, the indoor air AR can be purified. The greater the number of electrostatic precipitators 62 mounted on the air cleaning device 50, the greater the amount of air AR that can be cleaned per unit time.

According to the present embodiment, the indoor unit 20 includes a plurality of relay connectors 64 to which electrical wiring 66 extending from a pair of electrostatic precipitators 62 is electrically connected, and the plurality of relay connectors 64 and the control board 72 are electrically connected. and a relay wiring 80 that is connected to each other. In this way, by providing the relay connector 64 for connecting the electric wiring 66 extending from the electrostatic precipitator 62 separately from the control board 72, it is possible to prevent the electric wiring 66 from being erroneously connected to another terminal on the control board 72. can be suppressed. In addition, by arranging each of the plurality of relay connectors 64 at a position where the electrical wiring 66 extending from the paired electrostatic precipitator 62 can be connected and the electrical wiring 66 extending from the other electrostatic precipitator 62 is difficult to connect, It is possible to prevent the electrical wiring 66 extending from the electrostatic precipitator 62 from being connected to a relay connector 64 other than the relay connector 64 that forms a pair. As compared with the case where the electrical wiring 66 is connected to the control board 72, it is possible to prevent the electrical wiring 66 extending from the plurality of electrostatic precipitators 62 from being erroneously connected.

Also, according to the present embodiment, the plurality of electrostatic precipitators 62 are arranged in a row. The plurality of relay connectors 64 are arranged in a line in the same direction as the direction in which the plurality of electrostatic precipitators 62 are arranged. Therefore, it is easy to arrange the electrostatic precipitator 62 and the relay connector 64 to be paired side by side. Thereby, the electrical wiring 66 extending from each electrostatic precipitator 62 can be easily connected to each relay connector 64 paired with each electrostatic precipitator 62 . Therefore, erroneous connection of the electrical wirings 66 extending from the plurality of electrostatic precipitators 62 can be further suppressed.

Further, according to the present embodiment, the length of the electrical wiring 66 is determined by the length of the electrical dust collector 62 provided with the electrical wiring 66 and the relay connector 64 paired with the electrical dust collector 62 , which are arranged adjacent to each other. shorter than the distance to the connector 64. Therefore, the electric wiring 66 does not reach the relay connector 64 other than the relay connector 64 paired with the electric dust collector 62 provided with the electric wiring 66, and is paired with the electric dust collector 62 provided with the electric wiring 66. It is connectable only to the relay connector 64 . Therefore, erroneous connection of the electrical wirings 66 extending from the plurality of electrostatic precipitators 62 can be suppressed more preferably.

Also, according to the present embodiment, the lengths of the electrical wirings 66 extending from the plurality of electrostatic precipitators 62 are equal to each other. Therefore, even if any of the plurality of arrangement areas 65 has any of the arrangement areas 65 in which any of the electric dust collectors 62 is arranged, the relay connector 64 to which the electric wiring 66 reaches is the relay connector 64 paired with the electric dust collector 62 . Easy to use only. Thus, by making the plurality of electric dust collectors 62 of the same type, it is possible to suppress erroneous connection of the electric wiring 66 regardless of which arrangement region 65 the plurality of electric dust collectors 62 are arranged. . Moreover, by making the plurality of electrostatic precipitators 62 the same kind of electrostatic precipitator, each electrostatic precipitator 62 and the electric wiring 66 extending from each electrostatic precipitator 62 can have the same configuration. Thereby, replacement work of the electric dust collectors 62 can be similarly performed on any of the plurality of electric dust collectors 62 . Therefore, the maintainability of the indoor unit 20 can be improved.

Further, according to the present embodiment, the relay box 63 is provided inside which accommodates at least part of the electrical wiring 66 , part of the relay wiring 80 , and the plurality of relay connectors 64 . Therefore, during manufacturing of the indoor unit 20 and maintenance of the indoor unit 20 , an operator may connect the plurality of electrical wires 66 to the plurality of relay connectors 64 inside the relay box 63 . As a result, erroneous connection of the electrical wiring 66 to a terminal other than the relay connector 64 can be further suppressed, and workability of assembling the electric dust collector 62 can be improved. Therefore, erroneous connection of the electrical wirings 66 extending from the plurality of electrostatic precipitators 62 can be suppressed more preferably.

Further, according to the present embodiment, the relay box 63 is arranged in a direction perpendicular to the direction in which the plurality of electrostatic precipitators 62 are arranged with respect to the plurality of electrostatic precipitators 62, and the direction in which the plurality of electrostatic precipitators 62 are arranged. extends to Therefore, while housing a plurality of relay connectors 64 in the relay box 63 , each relay connector 64 can be easily arranged at a suitable position with respect to each paired electrostatic precipitator 62 .

Also, according to the present embodiment, part of the electrical wiring 66 is located outside the junction box 63 . The junction box 63 has a canopy portion 63 c that covers a portion of the electrical wiring 66 located outside the junction box 63 . Therefore, even if part of the electrical wiring 66 is located outside the relay box 63 , it is possible to prevent the user from touching the electrical wiring 66 .

Further, according to the present embodiment, the control board 72 is arranged side by side with respect to the plurality of electric dust collectors 62 in the direction in which the plurality of electric dust collectors 62 are arranged. Therefore, the electric dust collectors 62 other than the electric dust collectors 62 adjacent to the control board 72 can be arranged relatively away from the control board 72, and the electric wiring 66 extending from the plurality of electric dust collectors 62 can be arranged with respect to the control board 72 by mistake. Connection can be suppressed more suitably. In addition, while arranging the relay box 63 in a direction orthogonal to the direction in which the plurality of electric dust collectors 62 are arranged with respect to the plurality of electric dust collectors 62, the control board 72 is arranged with respect to the plurality of electric dust collectors 62. By arranging them side by side in the direction, the plurality of electric dust collectors 62, relay boxes 63, and control boards 72 can be arranged with good space efficiency. In this case, it is easy to arrange a part of the relay box 63 and a part of the control board 72 relatively close to each other, and the relay connector 64 and the control board 72 can be easily connected by the relay wiring 80 . In this embodiment, the end of the second horizontal direction one side (+Y side) of the relay box 63 and the end of the first horizontal direction other side (−X side) of the control board 72 are relatively close to each other. are placed.

Further, according to the present embodiment, the indoor unit 20 includes the control board box 71 that accommodates the control board 72 and part of the relay wiring 80 inside. Therefore, it is possible to prevent the user or the like from touching the control board 72 . Further, if the lid portion 71b of the control board box 71 is kept closed when connecting the electric wiring 66 to the relay connector 64, the electric wiring 66 is not connected to the control board 72 by mistake.

Also, according to the present embodiment, each of the plurality of electric dust collectors 62 is individually detachably attached. Therefore, by appropriately removing the electric dust collectors 62, the number of the electric dust collectors 62 attached to the indoor unit main body 21 can be changed. Thereby, for example, even after installing the indoor unit 20, the number of the electric dust collectors 62 can be changed according to the user's request. Therefore, the dust collecting ability of the air cleaning device 50 can be adjusted according to the user's request. When the number of electrostatic precipitators 62 is less than the maximum mountable number, the arrangement of the electrostatic precipitators 62 can be arbitrarily selected from a plurality of arrangement areas 65 . Therefore, according to the number of the electric dust collectors 62, the arrangement of the electric dust collectors 62 that maximizes the dust collection efficiency of the air cleaning device 50 can be selected. In addition, since the plurality of electric dust collectors 62 can be individually attached and detached, when some of the electric dust collectors 62 fail, only the failed electric dust collector 62 can be removed and replaced. As a result, it is not necessary to replace all of the plurality of electrostatic precipitators 62, and maintenance costs can be reduced.

Also, conventionally, if a plurality of electrostatic precipitators 62 can be individually attached and detached, and the number of electrostatic precipitators 62 can be changed according to the user's request, etc., incorrect connection of the electrical wiring 66 when installing the electrostatic precipitator 62 was more likely to occur. In contrast, according to the present embodiment, it is possible to prevent the electric wiring 66 from being erroneously connected as described above. Therefore, the plurality of electrostatic precipitators 62 can be individually detachable to improve convenience for the user and reduce the risk of incorrect wiring.

In addition, in the present embodiment, the end of the electrostatic precipitator 62 on one side in the first horizontal direction (+X side) is not fixed with a bolt, but hooked on the engagement hole 65a and held by the support member 61. Therefore, the number of bolts for fixing the electrostatic precipitator 62 can be reduced compared to the case where both side portions of the electrostatic precipitator 62 in the first horizontal direction X are fixed with bolts. This facilitates the work of attaching and detaching the electrostatic precipitator 62 .

Also, according to the present embodiment, the indoor unit 20 is a ceiling-embedded indoor unit. The indoor unit 20 includes an air cleaning device 50 having a plurality of electric dust collectors 62, and a decorative panel 24 arranged with the air cleaning device 50 interposed between the indoor unit main body 21. - 特許庁Since such an indoor unit 20 is installed on the ceiling, conventionally, it has been difficult to replace the electrostatic precipitator 62 . On the other hand, according to the present embodiment, as described above, erroneous connection of the electrical wiring 66 can be suppressed when replacing the electrostatic precipitator 62, so that the electrostatic precipitator 62 can be easily assembled. Therefore, the work of replacing the electric dust collector 62 in the ceiling-embedded indoor unit 20 can be performed more easily than conventionally.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of the embodiments described above, and the following configurations and methods can also be adopted.

The number of electrostatic precipitators is not particularly limited. The electrostatic precipitator may be any type of electrostatic precipitator. A plurality of electrostatic precipitators may be arranged in any way, and may not be arranged in a line. The length of the electrical wiring extending from the electrostatic precipitator may be any length as long as it can be connected to the relay connector paired with the electrostatic precipitator. A plurality of electrostatic precipitators may not be individually detachable. A plurality of electrostatic precipitators may be collectively attached detachably.

The number of relay connectors is not particularly limited as long as relay connectors paired with a plurality of electrostatic precipitators are provided. The plurality of relay connectors may be arranged in any manner as long as the electrical wiring extending from the paired electrostatic precipitator can be connected to each other. The relay box may be arranged in any way. The relay box may house therein the entire electrical wiring extending from the electrostatic precipitator. The junction box does not have to have a canopy. A relay box may not be provided. The control board may be arranged in any way. The control board box may be arranged in any way. A control board box may not be provided. The indoor unit of the present disclosure may be applied to any type of indoor unit.

Each configuration and each method described in this specification can be combined as appropriate within a mutually consistent range.

DESCRIPTION OF SYMBOLS 10... Outdoor unit, 20... Indoor unit, 21... Indoor unit main body, 24... Decorative panel, 50... Air cleaning device, 62... Electric dust collector, 63... Relay box, 63c... Eaves part, 64... Relay connector, 66... Electricity Wiring 71 Control board box 72 Control board 80 Relay wiring 100 Air conditioner

Claims

An indoor unit of an air conditioner,
indoor unit main body,
a plurality of electrostatic precipitators attached to the indoor unit main body;
a control board that controls the plurality of electrostatic precipitators;
a plurality of relay connectors paired with the plurality of electrostatic precipitators and electrically connected to electrical wiring extending from the paired electrostatic precipitators;
relay wiring that electrically connects the plurality of relay connectors and the control board;
indoor unit.
The plurality of electrostatic precipitators are arranged in a row,
The indoor unit according to claim 1, wherein the plurality of relay connectors are arranged in a row in the same direction as the direction in which the plurality of electrostatic precipitators are arranged.
wherein the length of the electric wiring is shorter than the distance between the electric dust collector provided with the electric wiring and the relay connector arranged adjacent to the relay connector paired with the electric dust collector. Item 2. The indoor unit according to Item 2.
The indoor unit according to claim 2 or 3, wherein the electrical wires extending from the plurality of electrostatic precipitators have the same length.
The indoor unit according to any one of claims 2 to 4, further comprising a relay box that accommodates therein at least part of the electrical wiring, part of the relay wiring, and the plurality of relay connectors.
6. The junction box according to claim 5, wherein the junction box is arranged in a direction orthogonal to a direction in which the plurality of electrostatic precipitators are arranged with respect to the plurality of electrostatic precipitators, and extends in a direction in which the plurality of electrostatic precipitators are arranged. indoor unit.
part of the electrical wiring is located outside the relay box,
7. The indoor unit according to claim 6, wherein said relay box has a canopy covering a portion of said electrical wiring located outside said relay box.
The indoor unit according to any one of claims 2 to 7, wherein the control board is arranged side by side with respect to the plurality of electrostatic precipitators in a direction in which the plurality of electrostatic precipitators are arranged.
The indoor unit according to any one of claims 1 to 8, comprising a control board box that accommodates the control board and part of the relay wiring.
The indoor unit according to any one of claims 1 to 9, wherein each of the plurality of electrostatic precipitators is individually detachably attached.
It is a ceiling-embedded indoor unit,
an air cleaning device comprising the plurality of electrostatic precipitators;
a decorative panel arranged with the air cleaning device sandwiched between the indoor unit main body;
The indoor unit according to any one of claims 1 to 10, comprising:
The indoor unit according to any one of claims 1 to 11;
outdoor unit and
An air conditioner.