CN115298490A

CN115298490A - Indoor unit of air conditioner

Info

Publication number: CN115298490A
Application number: CN202080098866.4A
Authority: CN
Inventors: 小泽哲朗
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2022-11-04
Also published as: JPWO2021192091A1; JP7356577B2; WO2021192091A1

Abstract

An indoor unit of an air conditioner according to an embodiment of the present invention includes a heat exchanger, a control unit, a casing, an outlet unit, and a fan. The control unit includes a 1 st terminal block to which a power supply line is connected and a 2 nd terminal block to which a communication line is connected. The housing accommodates the heat exchanger and the control portion, and includes a front panel opposed to the heat exchanger and a front cover opposed to the control portion and detachable with respect to the front panel. The air outlet unit is mounted on the front panel and has an air outlet. The fan generates an airflow blown out from the air outlet via the heat exchanger. A part of the control portion overlaps with the air outlet unit in an axial direction of the air outlet. The 1 st terminal block and the 2 nd terminal block overlap with the front cover in the axial direction and do not overlap with the air outlet unit and the front panel.

Description

Indoor unit of air conditioner

Technical Field

Embodiments of the present invention relate to an indoor unit of an air conditioner.

Background

Generally, an indoor unit of an air conditioner includes an air intake port, an air outlet port, a heat exchanger, and a fan that generates an airflow from the intake port to the outlet port via the heat exchanger. Further, a control unit for controlling the operation of the indoor unit is disposed in the casing of the indoor unit.

The control unit includes a control board on which various electronic components are mounted, and a terminal block to which various wirings are connected. For example, the various wirings include a power supply line for introducing power, and a communication line for inputting and outputting signals.

In some cases, work for the control unit is required at the time of installation of the indoor unit or in maintenance service. From the viewpoint of efficiency of such work, an indoor unit having a structure in which access to the control unit is easy is desired.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2017/142026

Disclosure of Invention

Technical problem to be solved by the invention

The invention provides an indoor unit of an air conditioner capable of improving the efficiency of operation of a control part.

Means for solving the problems

Drawings

Fig. 1 is a schematic perspective view of an indoor unit according to an embodiment.

Fig. 2 is a diagram showing an example of the arrangement of the indoor units.

Fig. 3 is a schematic sectional view of the indoor unit along the line III-II I in fig. 1.

Fig. 4 is a schematic front view of the indoor unit with the front cover mounted.

Fig. 5 is a schematic front view of the indoor unit with the front cover removed.

Fig. 6 is an enlarged view of the vicinity of the terminal block and the guide shown in fig. 5.

Fig. 7 is a schematic cross-sectional view showing the relationship between the 1 st and 2 nd insertion ports and the power supply line.

Detailed Description

One embodiment is described with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of an indoor unit 1 according to the present embodiment. The indoor unit 1 is connected to an outdoor unit including a compressor for compressing a refrigerant, an outdoor heat exchanger, and the like, by a refrigerant pipe. An air conditioner having a refrigeration cycle is configured by an indoor unit 1, an outdoor unit, refrigerant piping, and the like. The air conditioner can switch between cooling operation and heating operation, for example. However, the air conditioner may perform only the cooling operation or only the heating operation.

In the present embodiment, as shown in fig. 1, the X direction, the Y direction, and the Z direction are defined. These X, Y and Z directions are orthogonal to each other. The Z direction is parallel to the vertical direction. In the following description, the Z direction is sometimes referred to as an upper direction, and a direction opposite thereto is referred to as a lower direction.

The indoor unit 1 includes a casing 2 and an air outlet unit 4 having an air outlet 3 at a front end. The housing 2 includes a front panel 20, a front cover 21 disposed above the front panel 20, a back panel 22 opposed to the front panel 20 and the front cover 21, a pair of

side panels

23, 24 opposed to each other, a bottom panel 25, and a top panel 26 opposed to the bottom panel 25.

The front plate 20, the front cover 21, and the back plate 22 are parallel to an X-Z plane defined by the X direction and the Z direction. The

side panels

23, 24 are parallel to a Y-Z plane defined by the Y-direction and the Z-direction. The bottom panel 25 and the top panel 26 are parallel to an X-Y plane defined by the X direction and the Y direction. In the example of fig. 1, the housing 2 is a flat rectangular parallelepiped shape whose width in the Y direction is sufficiently small compared to the widths in the X direction and the Z direction. However, the shape of the housing 2 is not limited to this example.

The front cover 21 is disposed between the front panel 20 and the top panel 26 in the Z direction. The front cover 21 is mounted to the front panel 20 by screws 211. Further, for example, a pair of claw portions are provided on the back surface of the front cover 21, and these claw portions are hooked in mounting holes provided in the

side panels

23, 24. In the above configuration, by removing the screws 211, the front cover 21 is detachable with respect to the other portions of the housing 2. In addition, the configuration for the detachable front cover 21 is not limited to the configuration illustrated here.

The air outlet unit 4 includes a cylindrical air outlet cover 40 whose front end tapers toward the air outlet 3. The blowoff port cover 40 is mounted to the front panel 20 at least by screws 41. In the example shown in fig. 1, a recess 42 is provided in the outer peripheral surface of the outlet cover 40, and the screw 41 passes through a through hole provided in the end surface of the recess 42 on the casing 2 side.

The air outlet unit 4 further includes a louver 5 provided in the air outlet 3. In the example of fig. 1, the louver 5 is constituted by three rotatable

wind direction plates

51, 52, 53. The louver 5 may be constituted by two or less wind direction plates or four or more wind direction plates.

Fig. 2 is a diagram showing an example of the arrangement of the indoor unit 1. The indoor unit 1 is provided in a state of being stacked in a plurality of layers in the Z direction, for example. In the example of fig. 2, three indoor units 1 are stacked together, and the back surface plates 22 of these indoor units 1 are connected to a frame F made of metal. The frame F is disposed along, for example, a column or a wall surface of a building.

Even in the state where the indoor units 1 are stacked as shown in fig. 2, the front covers 21 of the respective indoor units 1 can be detached by loosening the screws 211. That is, even when another indoor unit 1 is disposed directly above the front cover 21 as in the middle or lower indoor unit 1 in the drawing, attachment and detachment of the front cover 21 is not hindered by the other indoor unit 1.

The plurality of indoor units 1 are connected to a remote controller RC for setting a target temperature, an amount of air blowing, an air blowing direction, and the like. One remote controller RC may be provided for one indoor unit 1, or one remote controller RC may be provided for a plurality of indoor units 1. Each indoor unit 1 is connected to a common outdoor unit by, for example, a refrigerant pipe, and constitutes one air conditioner.

In addition, the arrangement manner of the indoor unit 1 is not limited to the example of fig. 2. For example, the number of indoor units 1 included in the air conditioner is not limited to 3, and may be 2 or less, or 4 or more. The plurality of indoor units 1 may be arranged in the X direction, or may be disposed at positions distant from each other.

Fig. 3 is a schematic sectional view of the indoor unit 1 along the line III-II I in fig. 1. As shown in fig. 3, a heat exchanger 6 is disposed inside the casing 2. The heat exchanger 6 includes a plurality of heat conductive pipes 60 extending in the X direction and a plurality of fins 61 connected to the heat conductive pipes 60. As shown in fig. 3, the plurality of fins 61 have a long shape in the Z direction and are arranged at intervals in the X direction.

Rear plate 22 is provided with connection ports 62 and 63 for refrigerant pipes connected to the outdoor unit, and suction port 27 facing heat exchanger 6. For example, the inlet of the flow path formed by the heat transfer pipes 60 is connected to the connection port 62, and the outlet of the flow path is connected to the connection port 63.

A drain pan 64 for receiving dew condensation water generated by the heat exchanger 6 is disposed below the heat exchanger 6. The dew condensation water accumulated in the drain pan 64 is discharged to the outside of the casing 2 through a pipe not shown.

An attachment plate 70 parallel to the X-Z plane is disposed above the heat exchanger 6. The lower end of the mounting plate 70 is connected with a 1 st partition plate 71 parallel to the X-Y plane. A heat insulating material 65 is disposed between the 1 st partition plate 71 and the heat exchanger 6. The mounting plate 70 and the 1 st partition plate 71 may be integrally formed by bending 1 plate into an L-shape, or may be separate plates.

The mounting plate 70 is opposed to the front cover 21 and the back panel 22. The mounting plate 70, the 1 st partition plate 71, the front cover 21, and the top plate 26 form a 1 st space S1 for accommodating the control unit 8.

The 2 nd partition plate 72 is disposed between the 1 st partition plate 71 and the back panel 22. The mounting plate 70, the 2 nd partition plate 72, the back plate 22, and the top plate 26 form a 2 nd space S2 between the 1 st space S1 and the back plate 22. In the example of fig. 3, the 2 nd space S2 is smaller than the 1 st space S1.

The control unit 8 includes a control board 80 and various electronic components 81. The control board 80 is mounted on the mounting plate 70. Each electronic component 81 is mounted on one surface of the control board 80 facing the front cover 21.

The front panel 20 has an opening 29 overlapping the heat exchanger 6 in the Y direction. A fan 9 facing the heat exchanger 6 through the opening 29 is disposed inside the outlet cover 40. The fan 9 is, for example, an axial fan, and includes a fan motor 90 and a plurality of blades 91 that are rotated about an axis AX by the fan motor 90. In the present embodiment, the axis AX is parallel to the Y direction.

The fan 9 is disposed inside the 1 st cylindrical member 92 coaxial with the axis AX. The 1 st cylindrical member 92 surrounds the opening 29 outside the casing 2 and inside the outlet cover 40. At least a part of the outer peripheral surface of the 1 st cylindrical member 92 is covered with a heat insulating material 93.

The louver 5 is disposed at the end of the 2 nd cylindrical member 31 coaxial with the axis AX. The

louvers

51, 52, 53 of the louver 5 are rotated by a louver drive mechanism including, for example, a motor. The

wind direction plates

51, 52, 53 may be manually rotated.

At least a part of the outer peripheral surface of the 2 nd cylindrical member 31 is covered with a heat insulating material 32. The outlet 3 corresponds to an opening on the front end side of the 2 nd cylindrical member 31. In the example of fig. 3, the center of the air outlet 3 coincides with the axis AX.

The louver 5, the 2 nd cylindrical member 31, the heat insulator 32, and the like constitute the rotating unit 30. The rotary unit 30 is held by the holding mechanism 10 so as to be rotatable about the axis AX.

Specifically, the holding mechanism 10 rotatably connects the 1 st cylindrical member 92 and the 2 nd cylindrical member 31. The holding mechanism 10 includes, for example, a ring gear provided at an end of the 2 nd cylindrical member 31, and the 2 nd cylindrical member 31 is rotated by transmitting the gear in a circumferential direction around the axis AX by a motor. The rotating unit 30 may also be rotated manually.

In the air passage constituted by the 1 st cylindrical member 92 and the 2 nd cylindrical member 31, the rectifying plate 94 is disposed between the fan 9 and the louver 5. The rectifying plate 94 is supported by the 1 st cylindrical member 92. The rectifying plate 94 has, for example, a honeycomb structure having a plurality of openings arranged in a hexagonal shape, but is not limited to this example.

When fan 9 rotates, an airflow passing through suction port 27, heat exchanger 6, rectifying plate 94, and blow-out port 3 in this order is generated. In the cooling operation, the heat exchanger 6 functions as an evaporator, and cools the air taken in through the inlet 27. During the heating operation, the heat exchanger 6 functions as a condenser, and heats the air taken in through the intake port 27.

The rectifying plate 94 regulates the turbulent air flow immediately after passing through the fan 9 to be substantially parallel to the axis AX. The adjusted airflow is sent out from the air outlet 3 in a direction according to the angle of the

wind direction plates

51, 52, 53 of the louver 5.

The control unit 8 controls the rotation speed of the fan 9 based on information input from the outside, the suction temperature and the discharge temperature detected by the temperature sensor provided in the indoor unit 1, and the like. Further, the control unit 8 controls the holding mechanism 10 and the louver 5 based on the setting information of the wind direction inputted from the outside. The air can be blown in various directions by rotating the rotating unit 30 by the holding mechanism 10 and changing the angles of the

wind direction plates

51, 52, 53 of the louver 5.

Next, the detailed configuration of the control unit 8 and its periphery will be described.

Fig. 4 is a schematic front view of the indoor unit 1 with the front cover 21 mounted. Fig. 5 is a schematic front view of the indoor unit 1 with the front cover 21 removed.

As shown in fig. 4, the front panel 20 of the front cover 21 has a pair of

linear portions

20a and 20b parallel to the X direction along the upper edge thereof, and a convex portion 20c protruding toward the front cover 21 between the

linear portions

20a and 20 b. The convex portion 20C has an arc shape having a vertex overlapping the center C of the indoor unit 1 in the X direction. In the example of fig. 4, the center C intersects the axis AX. The

screws

41, 211 and the recess 42 described above also overlap the center C.

From another point of view, the front cover 21 has a pair of linear portions in contact with the

linear portions

20a, 20b and a concave portion in contact with the convex portion 20c. The concave portion has an arc shape having a bottom portion overlapping the center C.

The upper portion of the outlet unit 4 overlaps the convex portion 20c. The base portion of the blowoff port cover 40 in the Y direction is a circle centered on the axis AX, and the convex portion 20c has substantially the same curvature as the base portion.

By removing the screws 211, the front cover 21 can be removed. As shown in fig. 5, a female screw 201 for screwing a screw 211 is provided in the convex portion 20c.

In addition to the control board 80 and the electronic components 81 described above, the control section 8 includes a 1 st terminal block 82, a 2 nd terminal block 83, a 1 st guide 84, and a 2 nd guide 85. These terminal blocks 82 and 83 and guides 84 and 85 are mounted on the mounting plate 70.

In the example of fig. 5, the control board 80 is disposed closer to the side panel 24 (left side in the figure) than the center C, and the terminal blocks 82 and 83 and the

guides

84 and 85 are disposed closer to the side panel 23 (right side in the figure) than the center C. The 1 st terminal block 82 is located between the 1 st guide 84 and the control board 80, the 1 st guide 84 is located between the 1 st terminal block 82 and the 2 nd terminal block 83, the 2 nd terminal block 83 is located between the 1 st guide 84 and the 2 nd guide 85, and the 2 nd guide 85 is located between the 2 nd terminal block 83 and the side panel 23.

In the present embodiment, a part of the control unit 8 overlaps the outlet unit 4 and the convex portion 20c in the Y direction (axial direction). Specifically, a part of the control board 80 overlaps with the air outlet unit 4 and the convex portion 20c, and the terminal blocks 82, 83 and the

guides

84, 85 do not overlap with the air outlet unit 4 and the convex portion 20c.

The mounting plate 70 has a 1 st insertion hole 73 for passing various wirings near the side panel 23. In the example of fig. 5, the 1 st insertion hole 73 is a groove recessed downward from the upper edge of the mounting plate 70. However, the 1 st insertion hole 73 may be an opening provided in the attachment plate 70. The 1 st insertion port 73 does not overlap with the outlet port unit 4 and the front panel 20 in the Y direction, and overlaps with the front cover 21 in a state where the front cover 21 is closed.

Fig. 6 is an enlarged view of the vicinity of the terminal blocks 82 and 83 and the

guides

84 and 85 shown in fig. 5. In the present embodiment, the 1 st terminal block 82 has two 1 st terminals 82a arranged in the Z direction. Further, the 2 nd terminal block 83 has four 2 nd terminals 83a arranged in the Z direction. However, the 1 st terminal block 82 is not limited to two in the number of the 1 st terminals 82a. Likewise, the number of the 2 nd terminals 83a of the 2 nd terminal block 83 is not limited to four.

Both the terminal blocks 82 and 83 extend in the Z direction. Since the 2 nd terminal block 83 has a larger number of terminals than the 1 st terminal block 82, the 2 nd terminal block 83 is longer than the 1 st terminal block 82 in the Z direction. The 1 st guide 84 extends in a long strip in the Z direction. The 2 nd guide 85 extends in a long line in a direction inclined with respect to the X direction and the Z direction.

The 1 st terminal block 82 and the 1 st guide 84 are located above the convex portion 20c. On the other hand, the 2 nd terminal block 83 and the 2 nd guide 85 are located at positions not overlapping the convex portion 20c, i.e., above the linear portion 20 b.

One ends of the power supply lines 86 are connected to the 1 st terminals 82a, respectively. These power supply lines 86 are fixed to the 1 st terminal 82a by, for example, screws provided on the 1 st terminal 82a. By loosening the screw, the power supply line 86 can be detached from the 1 st terminal 82a. Further, one ends of the trunk lines 87 are connected to the 1 st terminals 82a, respectively. The other ends of these relay lines 87 are connected to the control board 80 or the electronic components 81, for example.

One ends of the communication lines 88 are connected to the respective 2 nd terminals 83a. These communication lines 88 are fixed to the 2 nd terminal 83a by, for example, screws provided on the 2 nd terminal 83a. By loosening the screw, the communication line 88 can be detached from the 2 nd terminal 83a. Further, one ends of the trunk lines 89 are connected to the respective 2 nd terminals 83a. The other ends of these trunk lines 89 are connected to the control board 80 or the electronic component 81, for example.

The power supply line 86 connected to each 1 st terminal 82a passes through the 1 st insertion hole 73 via the 1 st guide 84. For example, the 1 st guide 84 has two slots or holes of a size corresponding to the power wires 86, through which the respective power wires 86 pass.

The communication line 88 connected to each 2 nd terminal 83a passes through the 1 st insertion hole 73 via the 2 nd guide 85. For example, the 2 nd guide 85 has four slots or holes of a size corresponding to the communication lines 88, through which the respective communication lines 88 pass.

By providing the 1 st guide 84, excessive slack of the power cord 86 can be suppressed. Further, since the power supply line 86 between the 1 st insertion port 73 and the 1 st terminal 82a is bent by the 1 st guide 84, it is difficult to apply a large force to the connection portion between the power supply line 86 and the 1 st terminal 82a even in the case where the power supply line 86 is pulled. Thereby, the connection reliability between the power supply line 86 and the 1 st terminal 82a is improved. The same effects can be obtained with respect to the 2 nd guide 85 and the communication line 88.

In the example shown in fig. 6, the frame member 74 is mounted on a part of the 1 st through opening 73, and the respective communication lines 88 pass through inside the frame member 74. Each power supply wire 86 passes through the outside of the frame member 74 at the 1 st insertion hole 73.

As shown by broken lines in fig. 6, the back plate 22 has two 2

nd insertion holes

22a and 22b located below the 1 st insertion hole 73. In the example of fig. 6, the 2

nd insertion holes

22a, 22b are arranged in the X direction. Each power supply line 86 passes through the 2 nd insertion hole 22a and extends to the outside of the indoor unit 1. Each communication line 88 passes through the 2 nd through hole 22b and extends to the outside of the indoor unit 1.

Each power supply line 86 is connected to an external power supply of the indoor unit 1. For example, two of the four communication lines 88 are connected to the outdoor unit, and the remaining two are connected to the remote controller RC. In the case where the air conditioner includes a plurality of indoor units 1 as in the example of fig. 2, any one of the communication lines 88 may be connected to the other indoor units 1.

Fig. 7 is a schematic cross-sectional view showing the relationship between the 1 st and 2

nd insertion ports

73 and 22a and the power supply line 86. The power supply line 86 extends from the 1 st space S1 in which the control unit 8 is disposed, through the 1 st insertion port 73 to the 2 nd space S2 between the attachment plate 70 and the back plate 22, and through the 2 nd insertion port 22a to the outside of the indoor unit 1.

As shown in fig. 7, when the 2 nd insertion opening 22a is positioned below the 1 st insertion opening 73, the power supply line 86 is inclined from the 1 st insertion opening 73 toward the 2 nd insertion opening 22a in the 2 nd space S2. Therefore, even if the moisture attached to the power supply line 86 outside the indoor unit 1 enters the 2 nd space S2 through the power supply line 86, the moisture does not reach the 1 st insertion hole 73. This can protect the control unit 8 disposed in the 1 st space S1 from moisture.

As shown in fig. 7 by parentheses, the relationship between the 1 st insertion opening 73 and the 2 nd insertion opening 22b and the communication line 88 is the same as the relationship between the 1 st insertion opening 73 and the 2 nd insertion opening 22a and the power line 86. Therefore, the moisture along the communication line 88 does not reach the 1 st space S1.

With the above-described configuration of the indoor unit 1, the work efficiency for the control unit 8 during installation and maintenance service is improved. That is, by removing the front cover 21 that is attachable to and detachable from the front panel 20, the control unit 8 can be accessed from the front side of the indoor unit 1, and therefore, the work can be easily performed. Further, since at least the terminal blocks 82, 83 do not overlap the air outlet unit 4 and the front panel 20 in the Y direction, the work related to the connection of the 1 st terminal block 82 and the power supply line 86 and the work related to the connection of the 2 nd terminal block 83 and the communication line 88 become extremely easy.

On the other hand, in the present embodiment, a part of the control board 80 overlaps the outlet unit 4 and the front panel 20 in the Y direction. Normally, the frequency of performing work on the portions other than the terminal blocks 82, 83 of the control board 80 and the like is smaller than the frequency of performing work on the terminal blocks 82, 83. Therefore, even if such a portion overlaps with the air outlet unit 4 and the front panel 20, the influence on the work efficiency is small.

If the entire control unit 8 is configured not to overlap the air outlet unit 4 and the front panel 20, the casing 2 needs to be increased in size to ensure an arrangement space for the control unit 8. In contrast, as in the present embodiment, when a part of the control section 8 overlaps the outlet unit 4 and the front panel 20, the size of the casing 2 can be reduced.

In the present embodiment, the front panel 20 has the convex portion 20c that protrudes toward the front cover 21 along the air outlet unit 4, and the convex portion 20c overlaps the control board 80 in the Y direction. With such a configuration, since the area in which the front panel 20 and the control unit 8 overlap can be minimized, the work efficiency for the control unit 8 is further improved.

In the present embodiment, the 1 st insertion opening 73 through which the power cord 86 and the communication cord 88 pass does not overlap the air outlet unit 4 and the front panel 20 in the Y direction. In this case, too, the work of inserting the power line 86 and the communication line 88 through the 1 st insertion hole 73 is facilitated. Further, as described above, since the 2

nd insertion holes

22a and 22b of the back plate 22 are provided below the 1 st insertion hole 73, the waterproofness of the control unit 8 is improved.

In the present embodiment, the two 1 st terminals 82a of the 1 st terminal block 82 and the four 2 nd terminals 83a of the 2 nd terminal block 83 are all aligned in the Z direction (the direction in which the front panel 20 and the front cover 21 are aligned). The 1 st terminal block 82 is disposed at a position overlapping the convex portion 20c in the Z direction, and the 2 nd terminal block 83 is disposed at a position not overlapping the convex portion 20c in the Z direction. Thus, the 1 st terminal block 82 having a small number of terminals is disposed above the projection 20c having a narrow width of the disposition space in the Z direction, and the 2 nd terminal block 83 having a large number of terminals is disposed in the other region, whereby the effective layout of the terminal blocks 82 and 83 can be realized.

In the present embodiment, an example is shown in which the front cover 21 is provided above the air outlet unit 4, but the front cover 21 may be provided below or on the left and right of the air outlet unit 4. In this case, the 1 st space S1 and the control portion 8 are disposed below or on the left and right of the heat exchanger 6. Even with such a configuration, the same effects as those of the present embodiment can be obtained by applying the layout of the control unit 8 shown in fig. 5 and 6.

Several embodiments of the present invention have been described, but these embodiments are presented by way of example only and are not intended to limit the scope of the invention. These new embodiments may be implemented in other various ways, and various omissions, substitutions, and changes may be made without departing from the scope of the invention. These embodiments and modifications are included in the scope and gist of the invention, and are also included in the invention described in the scope of claims and the equivalent scope thereof.

Description of the reference symbols

1, 8230, indoor unit, 2, 8230, shell, 3, 8230, blowing port, 4, 8230, blowing port unit, 6, heat exchanger, 8, 8230, control part, 9, 8230, fan, 20, 8230, front panel, 20, 8230, straight line part, 20, 8230, convex part, 21, front cover, 70, 8230, mounting plate, 73, 8230, 1, 80, 8230, control substrate, 81, 8230, electronic component, 82, 8230, terminal platform, 83, 8230, 2, AX 8230, shaft, S1, 8230, 1, S2, 8230and 2.

Claims

1. An indoor unit of an air conditioner, comprising:

a heat exchanger;

a control unit including a 1 st terminal block to which a power line is connected and a 2 nd terminal block to which a communication line is connected;

a case that houses the heat exchanger and the control unit, and includes a front panel that faces the heat exchanger, and a front cover that faces the control unit and is detachable from the front panel;

a blow-out port unit that is mounted on the front panel and has a blow-out port; and

a fan for generating an airflow blown out from the air outlet via the heat exchanger,

a part of the control portion overlaps with the air outlet unit in an axial direction of the air outlet,

the 1 st terminal block and the 2 nd terminal block overlap with the front cover in the axial direction and do not overlap with the air outlet unit and the front panel.

2. The indoor unit of claim 1,

the control portion further includes a control substrate connected to the 1 st terminal block and the 2 nd terminal block,

a convex portion protruding toward the front cover is provided along an edge portion of the front panel of the front cover,

a part of the control substrate overlaps with the convex portion in the axial direction.

3. The indoor unit of claim 2, further comprising:

a mounting plate disposed inside the case and facing the front cover,

the control board, the 1 st terminal block, and the 2 nd terminal block are mounted on the mounting board.

4. An indoor unit as claimed in claim 3,

the mounting plate has a 1 st insertion hole for passing at least one of the power line and the communication line,

the 1 st insertion opening overlaps with the front cover in the axial direction, and does not overlap with the air outlet unit and the front panel.

5. An indoor unit as claimed in claim 4,

the housing also includes a back panel opposite the mounting plate,

the back panel has a 2 nd insertion opening for passing at least one of the power line and the communication line,

the 2 nd through hole is arranged below the 1 st through hole.

6. The indoor unit according to any one of claims 2 to 5,

the 1 st terminal block has a plurality of 1 st terminals arranged in an arrangement direction of the front panel and the front cover, and is disposed at a position overlapping with the convex portion in the arrangement direction,

the 2 nd terminal block is arranged in the arrangement direction, has a plurality of 2 nd terminals more than the 1 st terminals, and is disposed at a position not overlapping with the convex portion in the arrangement direction.