Electrical component box and indoor unit

Abstract

This invention provides an electrical component box and indoor unit that improve the efficiency of internal arrangement of electrical components when circuit boards are positioned diagonally, and that contribute to noise countermeasures. [Solution] The system comprises a housing 110, a first circuit board 30 positioned diagonally in the depth direction when viewed from the front of the electrical component box 10, a sheet metal base 40 supporting the first circuit board 30, and a reactor 70 positioned on the back side of the first circuit board 30. The screws 73, which are fixing parts for detachably securing the reactor 70, are provided at a position away from the first circuit board 30 when viewed from the front of the electrical component box 10, and the sheet metal base 40 shields the noise from the reactor 70, suppressing its impact on the first circuit board 30.

Description

Technical Field

[0001] The present disclosure relates to an electrical component box and an indoor unit.

Background Art

[0002] Patent Document 1 discloses an indoor unit including an electrical component box in which a control board is arranged such that the mounting surface of the control board faces obliquely downward.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure provides an electrical component box and an indoor unit that contribute to improving the efficiency of the internal layout of the electrical component box when a board is arranged obliquely, and to noise countermeasures.

Means for Solving the Problems

[0005] An electrical component box according to the present disclosure includes a housing, a first board disposed in the housing so as to be oblique in the depth direction in a front view, a sheet metal base that supports the first board, and a reactor disposed on the back side of the first board, wherein a fixing portion that detachably fixes the reactor is provided at a position offset from the first board in a front view, and noise from the reactor is shielded by the sheet metal base to suppress influence on the first board. Further, an indoor unit according to the present disclosure includes a housing, a first board disposed in the housing so as to be oblique in the depth direction in a front view, a sheet metal base that supports the first board, and a reactor disposed on the back side of the first board, wherein a fixing portion that detachably fixes the reactor is provided at a position offset from the first board in a front view, and noise from the reactor is shielded by the sheet metal base to suppress influence on the first board.

Effects of the Invention

[0006] The electrical component box and indoor unit in this disclosure allow for efficient internal arrangement of the electrical component box, and the sheet metal base suppresses the noise influence of the reactor on the first circuit board. [Brief explanation of the drawing]

[0007] [Figure 1] Perspective view of the indoor unit according to this embodiment [Figure 2] Perspective view of the indoor unit with the electrical cover of the electrical component box removed. [Figure 3] Side view of the indoor unit with the electrical cover of the electrical components box removed. [Figure 4] Front view of the electrical component box [Figure 5] Perspective view of the electrical component box [Figure 6] Plan and cross-sectional view of the electrical component box. [Figure 7] Perspective view of the circuit board sheet metal unit [Figure 8] Perspective view of the first fastener [Figure 9] Perspective view of the second fastener [Figure 10] Perspective view of a sheet metal stand [Modes for carrying out the invention]

[0008] (Knowledge and other information that formed the basis of this disclosure) At the time the inventors conceived this disclosure, it was desirable to reduce the volume of the electrical components box in order to miniaturize the indoor unit. On the other hand, the number of circuit boards tended to increase due to the diversification of various functions and the installation of power boards for the indoor unit fan, etc. When the number of circuit boards increases, it becomes necessary to optimize the internal layout within the electrical components box. One possible way to improve the efficiency of internal layout is to arrange the circuit boards diagonally. However, unlike when the circuit boards are laid flat, the inventors discovered that this requires consideration of the specific shape for improving internal layout efficiency and noise countermeasures. To solve these problems, the subject matter of this disclosure was established. Accordingly, the present disclosure provides an electrical component box and an indoor unit that contribute to improving the efficiency of the internal arrangement of the electrical component box when a substrate is arranged diagonally, and to noise countermeasures.

[0009] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessarily detailed descriptions may be omitted. For example, detailed descriptions of well-known matters or repeated descriptions of substantially the same configurations may be omitted. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims.

[0010] The upward and downward directions used in the description of each drawing are based on the installed state of the indoor unit 1, with the side of the conditioned room defined as downward and the ceiling side defined as upward. Further, an electrical component box 10 is arranged on the side surface of the indoor unit 1. The side view of the indoor unit 1 corresponds to the front view of the electrical component box 10.

[0011] (Embodiment) [1-1. Configuration] [1-1-1. Configuration of Indoor Unit] Hereinafter, an embodiment to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a perspective view of the indoor unit 1 according to the present embodiment. FIG. 2 is a perspective view of the indoor unit 1 in a state where an electrical component cover 12 of the electrical component box 10 is removed. Further, FIG. 3 is a side view of the indoor unit 1 in a state where the electrical component cover 12 of the electrical component box 10 is removed.

[0012] The indoor unit 1 is a ceiling-built-in cassette-type indoor unit of an air conditioner installed in a ceiling space, and FIG. 1 and FIG. 2 are perspective views of the indoor unit 1 viewed from above. The paper planes of FIG. 1, FIG. 2, and FIG. 3 are substantially parallel to the horizontal plane in the installed state of the indoor unit 1, and are substantially perpendicular to the vertical direction. Note that FIG. 1 and FIG. 2 show a state where a back wall 112 is removed.

[0013] Indoor unit 1 has a casing 110 constituted by a front wall 111, a back wall 112, a right side wall 113, a left side wall 114, a first top surface panel 115 covering a blower space 123, a second top surface panel 116 covering an intake space 122, and a bottom surface panel 117.

[0014] The internal space of the casing 110 is partitioned by a partition wall (not illustrated) into the rear intake space 122 and the front blower space 123. In the intake space 123, a fan motor 131, and three indoor fans 135, 135, 135 that are connected to a drive shaft (not illustrated) of the fan motor 131 and driven by the fan motor 131 are disposed. The configuration in FIG. 1 is an example, and the number of fan motors and indoor fans included in the indoor unit 1 is not limited.

[0015] The partition wall (not illustrated) is provided with an opening (not illustrated) that communicates with the intake space 122 and the blower space 123, and the blowout port of the indoor fan 135 is joined to this opening. Further, the intake port 136 of the indoor fan 135 opens into the intake space 122.

[0016] In the intake space 122, the bottom surface panel 117 is provided with an intake port (not illustrated), and an intake filter (not illustrated) is disposed at this intake port. When the indoor fan 135 operates, the indoor fan 135 draws air from the intake space 122, whereby outside air flows into the intake space 122 through the intake filter (not illustrated). This outside air is sent by the indoor fan 135 to the blower space 123 through the opening formed in the partition wall (not illustrated). That is, the intake space 122 is the primary-side space of the indoor fan 135, and the blower space 123 is the secondary-side space.

[0017] A heat exchanger (not illustrated) is disposed in the blower space 123. The heat exchanger is a utilization-side heat exchanger that functions as an evaporator for evaporating a refrigerant supplied from an outdoor unit (not illustrated), or a condenser for condensing the refrigerant.

[0018] The airflow sent to the intake space 122 by the indoor fan 135 passes through the heat exchanger and is exhausted from the air outlet 111a formed in the front wall 111. An air supply duct (not shown), which is installed in the ceiling space together with the indoor unit 1, is connected to the air outlet 111a. The air supply duct is installed to one or more heated rooms and sends the air that has undergone heat exchange in the heat exchanger to the heated rooms.

[0019] Furthermore, a chamber may be provided between the air outlet 111a and the air supply duct. The air intake may open into the ceiling space where the indoor unit 1 is installed, or a duct or chamber that supplies air to the indoor unit 1 may be connected to the air intake. These chambers and ducts are installed in the ceiling space, for example, in the same way as the indoor unit 1.

[0020] [1-1-2. Configuration of the electrical component box] Figure 4 is a front view of the electrical component box 10 with the electrical component cover 12 removed. Figure 5 is a perspective view of the electrical component box 10 with the electrical component cover 12 removed. Figure 6 is a plan cross-sectional view of the electrical component box 10. An electrical component box 10 is positioned at one end of the intake space 122. The electrical cover 12 of the electrical component box 10 forms part of the left side wall 114 of the housing 110. The electrical component box 10 is a roughly rectangular box shape, positioned vertically across the entire height of the intake space 122 at the left end of the intake space 122.

[0021] The electrical component box 10 comprises a circuit board sheet metal unit 20 and a reactor 70. The substrate sheet metal unit 20 comprises a first substrate 30, a sheet metal base 40 formed to be slightly larger than the circumferential direction of the first substrate 30 so as to cover the entire circumferential direction of the first substrate 30, a first fastener 50 provided at the rear of the sheet metal base 40 and having an insertion opening 55 to support the rear of the first substrate 30, and a second fastener 60 provided at the front of the sheet metal base 40 and having a fastener 67 for fixing the front of the first substrate 30. The circuit board unit 20 is positioned diagonally in the depth direction when viewed from the front of the electrical component box 10. The first circuit board 30 is positioned on the opposite side of the reactor 70 via the sheet metal base 40. Numerous signal lines (not shown) that transmit and receive signals to and from the outside are attached to the first circuit board 30, and the sheet metal base 40 suppresses the influence of noise from the reactor 70 on these signal lines (not shown).

[0022] Figure 7 is a perspective view of the substrate sheet metal unit 20. Figure 8 is a perspective view of the first fastener 50. Figure 9 is a perspective view of the second fastener 60. Figure 10 is a perspective view of the sheet metal base 40. As shown in Figures 6 and 7, the first substrate 30 is fixed to the sheet metal base 40 at predetermined intervals. The sheet metal base 40 is formed to be larger overall in the circumferential direction than the first substrate 30 to the extent that it can suppress the influence of noise from the reactor 70 on the signal line (not shown).

[0023] The sheet metal base 40 comprises a main portion 41 that covers the entire first substrate 30 and shields the first substrate 30 from the reactor 70, a first fixing surface 43 formed by bending one end of the main portion 41 in the left-right direction and fixed to the rear wall 11 of the electrical equipment box 10, and bent portions 45 formed by bending the upper and lower parts of the other end of the main portion 41 in the left-right direction, respectively, for attaching wiring clamps 44. Furthermore, the sheet metal base 40 is formed by bending the main portion 41 and the bent portion 45 in a substantially horizontal direction from their upper ends and includes a second fixing surface 47 that is fixed to the upper wall 15 of the electrical component box 10. Furthermore, the sheet metal base 40 is formed by bending the main portion 41 and the lower end of the bent portion 45 in a substantially horizontal direction and includes a third fixing surface 49 that is fixed to the lower wall 17 of the electrical component box 10.

[0024] A first fastener hole 51 for installing a first fastener 50 is formed at one end of the depth side (the rear side of the electrical component box) of the main part 41. Three first fastener holes 51 are formed at equal intervals in the vertical direction. The first fasteners 50 are provided in the first fastener holes 51. Three first fasteners 50 are provided at equal intervals in the vertical direction. This allows the first substrate 30 to be stably fixed to the sheet metal base 40. The number, shape, and spacing of the first fasteners 50 can be arbitrarily changed.

[0025] At the other end of the front side of the main section 41 (the front side of the electrical component box 10), a second fastener hole 61 is formed for installing the second fastener 60. Three second fastener holes 61 are formed at equal intervals in the vertical direction. The second fasteners 60 are provided in the second fastener holes 61. Three second fasteners 60 are provided at equal intervals in the vertical direction. This allows the first substrate 30 to be stably fixed to the sheet metal base 40. Furthermore, the number, shape, and spacing of the second fasteners 60 can be arbitrarily changed.

[0026] As shown in Figure 8, the first fastener 50 includes a fitting portion 53 that fits into the first fastener hole 51, and an insertion opening 55 that supports the rear of the first substrate 30 (the side of the rear wall 11 when the sheet metal base 40 is fixed to the electrical component box 10). The socket 55 is U-shaped when viewed from the side. The rear of the first substrate 30 is inserted into the socket 55. When fixing the first substrate 30 to the sheet metal base 40, the socket 55 is used to position the first substrate 30. The first fastener 50 is formed from a flexible material.

[0027] As shown in Figure 9, the second fastener 60 includes a fitting portion 63 that fits into the second fastener hole 61, an engaging portion 65 that engages with the front of the first substrate 30 (the side of the electrical cover 12 when the sheet metal base 40 is fixed to the electrical equipment box 10), and a fastener 67 that fixes the front of the first substrate 30. The second fastener 60 is also made of a flexible material. The front part of the first substrate 30 engages with the engaging portion 65. The fastener 67 has a convex shape that extends upward toward the second fastener 60. The fastener 67 is inserted into an insertion hole (not shown) formed in the front of the first substrate 30 when the front of the first substrate 30 is engaged with the engaging portion 65, thereby fixing the first substrate 30 and the sheet metal base 40.

[0028] When the circuit board sheet metal unit 20 is positioned at an angle, removing the first circuit board 30 for replacement or other purposes becomes more difficult compared to when it is positioned flat. However, the above fixing method allows the first circuit board 30 to be easily removed from the sheet metal base 40.

[0029] As shown in Figures 4 and 6, the reactor 70 is fixed to the rear wall 11 of the electrical component box 10 at two points, top and bottom, by screws 73 which are fasteners. The reactor 70 is fixed to the upper center of the electrical component box 10. The screws 73 are an example of a "fixing part". In a front view with the circuit board unit 20 fixed to the electrical component box 10, the other end of the main part 41, which is the other end of the front side of the circuit board unit 20 (the front side of the electrical component box 10), is positioned so as not to overlap with the screws 73 of the reactor 70. This makes it easier to remove the reactor 70 during maintenance without having to remove the circuit board sheet metal unit 20, while also enabling the first circuit board 30 to be positioned in a way that minimizes the impact of the reactor 70.

[0030] As shown in Figures 4 to 7, the first substrate 30 is equipped with a tall electrolytic capacitor 33 (the component closest to the electrical cover 12 when the first substrate 30 is placed in the electrical box 10). Also, as shown in Figure 7, the sheet metal base 40 has a bending angle θ between the main part 41 and the first fixed surface 43. The bending angle θ is an angle that determines how diagonally the circuit board sheet metal unit 20 is tilted to be placed inside the electrical component box 10. This bending angle θ can be determined by the height H of the electrolytic capacitor 33 (the component closest to the electrical component cover 12 when the first circuit board 30 is placed in the electrical component box 10).

[0031] In other words, the bending angle θ can be arbitrarily determined so that the electrolytic capacitor 33 does not come into contact with the electrical cover 12 when the first substrate 30 (substrate sheet metal unit 20) is placed in the electrical component box 10. At this time, by reducing the bending angle θ within the range in which the electrolytic capacitor 33 does not come into contact with the electrical component cover 12, the internal space of the electrical component box 10 can be made more efficient.

[0032] In this embodiment, the bending angle θ is set such that, in a front view, the other end of the main part 41 on the front side (the front side of the electrical component box 10) and the screw 73 of the reactor 70 do not overlap. Furthermore, the bending angle θ in this embodiment is set such that, when viewed from the front, the other end of the main part 41 on the front side (the front side of the electrical component box 10) and the operation confirmation lamp 82 provided on the second circuit board 80, which will be described later, do not overlap.

[0033] Furthermore, the bending angle θ may be set to an angle that facilitates maintenance such as attaching and detaching signal wires to the connector 35, which will be described later.

[0034] As shown in Figure 4, the electrical component box 10 includes a second circuit board 80. The second board 80 is, for example, a power board, and is a board with a small number of signal lines attached to it. The second board 80 is less susceptible to noise than the first board 30, but it is a board with signal lines attached to it. The second circuit board 80 is located below the reactor 70, in the lower center of the electrical component box 10. In other words, unlike the first circuit board 30 which is located on the opposite side of the reactor 70 via a sheet metal base 40, the second circuit board 80 is positioned in a location where it may be affected by noise from the reactor 70. However, the second circuit board 80 has fewer signal lines, and the wiring path of the signal lines is arranged in a way that is less affected by the reactor 70, thus providing noise countermeasures through the arrangement of the second circuit board 80. This arrangement allows the first circuit board 30, which is large and has many signal lines, to be placed in a position less susceptible to noise from the reactor 70. Furthermore, the second circuit board 80, which is even less susceptible to noise than the first circuit board 30, does not require the same placement considerations as the first circuit board 30, thus making the internal layout of the electrical component box 10 more efficient.

[0035] The second circuit board 80 is provided with an operation confirmation lamp 82. The operation confirmation lamp 82 is, for example, a lamp that can confirm that the indoor unit 1 is operating. The operation confirmation lamp 82 may also indicate that a specific operating part of the air conditioning system comprising the indoor unit 1 is operating. In a front view with the circuit board unit 20 fixed to the electrical component box 10, the other end of the main part 41, which is the other end of the front side of the circuit board unit 20 (the front side of the electrical component box 10), is positioned so as not to overlap with the operation confirmation lamp 82. This makes it easier to check the operation status of the indoor unit 1, etc., while performing maintenance, as the operation status of the indoor unit 1, etc., can be easily viewed without having to remove the circuit board sheet metal unit 20.

[0036] As shown in Figure 5, an opening 18 is provided in the left wall 19 of the electrical component box 10. A connector 35 is positioned on the first circuit board 30 at a location that overlaps with the opening 18 in a side view of the electrical component box 10. In other words, the opening 18 is formed at a location that overlaps with the connector 35 in a side view of the electrical component box 10. Furthermore, the first circuit board 30 may include a connector 35 located at a position other than the opening 18 when viewed from the side of the electrical component box 10.

[0037] Multiple connectors 35 are provided on the first circuit board 30. Signal lines (not shown) for sending and receiving signals to and from the outside are attached to the connectors 35. Examples of signal lines include signal lines connected to a motor, signal lines connected to a drain pump, and signal lines connected to the housing of a heat exchanger temperature sensor, etc. The opening 18 is provided to facilitate maintenance of the signal lines because the first substrate 30 is positioned at an angle by the substrate sheet metal unit 20. The opening 18 only needs to have a shape that facilitates maintenance of the signal lines in relation to the position of the connector 35, and its size and shape can be arbitrarily changed.

[0038] The left wall 19 is provided with an upward-facing upper notch 18a with a rounded tip in the front portion of the upper 19a of the opening 18. The left wall 19 is provided with a downward-facing notch 18b with a rounded tip below the opening 18 19b. There are two of these notches 18b side by side on the left wall 19. The signal wire attached to the connector 35 passes through the upper notch 18a or the lower notch 18b and reaches the outside of the electrical component box 10.

[0039] Since the indoor unit 1 according to this embodiment is a ceiling-mounted cassette type installed in the ceiling space, it is assumed that maintenance workers will often access the electrical equipment box 10 from near the ceiling surface below the indoor unit 1 to perform maintenance. The front of the electrical component box 10 has a space S where no components are placed adjacent to the front side of the circuit board sheet metal unit 20 (the front side of the electrical component box 10) in the left-right direction, making it easy to remove the first circuit board 30 from the sheet metal base 40.

[0040] [1-2. Operation, effect] [1-2-1. Assembly of the PCB sheet metal unit 20] The assembly of the circuit board sheet metal unit 20 will be explained. First, the first fastener 50 is installed in the first fastener hole 51 of the sheet metal base 40. Similarly, the second fastener 60 is installed in the second fastener hole 61 of the sheet metal base 40. Next, the rear of the first substrate 30 is inserted into the insertion opening 55 of the first fastener 50 to position the first substrate 30. At this time, since the first fastener 50 is flexible, positioning the first substrate 30 is easy. Furthermore, the front part of the first substrate 30 is engaged with the engaging portion 65 of the second fastener 60, and a fixing device 67 is inserted into an insertion hole (not shown) formed in the front part of the first substrate 30 to fix the first substrate 30 and the sheet metal base 40, thereby assembling the substrate sheet metal unit 20. At this time, since the second fastener 60 is flexible, fixing the first substrate 30 is easy. [1-2-2. Arrangement of the circuit board sheet metal unit 20] The circuit board unit 20 is positioned so that, when viewed from the front of the electrical component box 10, the screws 73 of the reactor 70 do not overlap with the other end of the circuit board unit 20 on the front side (the front side of the electrical component box 10). At the same time, the circuit board sheet metal unit 20 is positioned so that, when viewed from the front of the electrical component box 10, it does not overlap with the operation confirmation lamp 82 of the second circuit board 80 or the other end of the circuit board sheet metal unit 20 on the front side (the front side of the electrical component box 10). To enable this arrangement, the bending angle θ is determined by considering the height H of the electrolytic capacitor 33 (the component closest to the electrical cover 12 when the first circuit board 30 is placed in the electrical box 10). The sheet metal base 40 is fixed to the electrical component box 10 by fixing the first fixing surface 43 of the sheet metal base 40 to the rear wall 11 of the electrical component box 10, the second fixing surface 47 to the upper wall 15 of the electrical component box 10, and the third fixing surface 49 to the lower wall 17 of the electrical component box 10.

[0041] [1-3. Effects, etc.] As described above, according to this embodiment, the electrical component box 10 and indoor unit 1 include a housing 110, a first circuit board 30 positioned diagonally in the depth direction when viewed from the front of the electrical component box 10 within the housing 110, a sheet metal base 40 supporting the first circuit board 30, and a reactor 70 positioned on the back side of the first circuit board 30. The screws 73, which are fixing parts for detachably securing the reactor 70, are provided at a position away from the first circuit board 30 when viewed from the front of the electrical component box 10, and the sheet metal base 40 shields the noise from the reactor 70, suppressing its influence on the first circuit board 30.

[0042] This configuration allows for a more efficient internal arrangement of the electrical components box 10, and the sheet metal base 40 suppresses the noise influence of the reactor 70 on the first circuit board 30.

[0043] Furthermore, according to this embodiment, the electrical component box 10 and the indoor unit 1 have signal lines (not shown) attached to the first circuit board 30 for sending and receiving signals to and from the outside.

[0044] This configuration makes it possible to suppress the noise influence of the reactor 70 on the first substrate 30, which is particularly susceptible to noise, where the noise-sensitive signal lines are attached.

[0045] Furthermore, according to this embodiment, in a front view of the electrical component box 10, the second circuit board 80 is positioned further back than the front side of the inclined first circuit board 30. The second circuit board 80 is a circuit board to which no signal lines are attached, and the second circuit board 80 is not positioned on the opposite side of the reactor 70 via the sheet metal base 40.

[0046] With this configuration, the first circuit board 30, to which signal lines susceptible to noise are attached, can be placed in a position less susceptible to noise from the reactor 70. Furthermore, the second circuit board 80, which does not have signal lines attached and is less susceptible to noise, does not require the same placement considerations as the first circuit board 30, thereby making the internal layout of the electrical components box 10 more efficient.

[0047] Furthermore, according to this embodiment, the electrical component box 10 and the indoor unit 1 are equipped with an operation confirmation lamp 82 on the back side of the first circuit board 30, in a position that does not overlap with the first circuit board 30 when viewed from the front.

[0048] This configuration makes it easier to perform maintenance on the electrical components box 10 while checking the operation of the indoor unit 1.

[0049] Furthermore, according to this embodiment, the electrical component box 10 and the indoor unit 1 are provided with a sheet metal base 40, which includes a first fastener 50 having an insertion opening 55 at the rear of the sheet metal base 40 for supporting the first circuit board 30, and the first circuit board 30 is fixed to the sheet metal base 40 by inserting the rear of the first circuit board 30 into the first fastener 50.

[0050] With this configuration, maintenance work on the back of the electrical component box 10 tends to be difficult, but the first circuit board 30 can be easily positioned by simply inserting it into the first fastener 50, and the first circuit board 30 can be easily attached and detached.

[0051] Furthermore, according to this embodiment, the electrical component box 10 and the indoor unit 1 are provided with a sheet metal base 40, which includes a second fastener 60 having a fastener 67 for fixing the first circuit board 30 to the front of the sheet metal base 40, and the first circuit board 30 is fixed to the sheet metal base 40 by fixing the front part to the sheet metal base 40 with the fastener 67 rather than the rear part.

[0052] With this configuration, the first circuit board 30 can be easily positioned at the back of the electrical component box 10 by simply inserting it into the first fastener 50, while the first circuit board is fixed to the sheet metal base 40 by the second fastener 60 at the front of the first fastener 50. This allows for easy attachment and detachment of the first circuit board 30, and also makes it easier to securely fix the first circuit board 30 to the sheet metal base 40.

[0053] The embodiments described above are for illustrative purposes only and may be modified, replaced, added, or omitted within the scope of the claims or equivalents thereof.

[0054] (Note) Based on the above description of embodiments, the following technologies are disclosed.

[0055] (Technology 1) An electrical component box for an indoor unit, comprising a housing, a first circuit board positioned diagonally in the depth direction when viewed from the front within the housing, a sheet metal base supporting the first circuit board, and a reactor positioned on the back side of the first circuit board, wherein a fixing part for detachably securing the reactor is provided at a position away from the first circuit board when viewed from the front, and the sheet metal base shields the noise of the reactor to suppress its influence on the first circuit board. This configuration allows for more efficient internal arrangement of the electrical components box, and the sheet metal base helps suppress the noise impact of the reactor on the first circuit board.

[0056] (Technology 2) The electrical component box according to Technology 1, characterized in that the first circuit board is fitted with signal lines for transmitting and receiving signals to and from the outside. This configuration makes it possible to suppress the noise effects of the reactor, particularly on the first substrate to which signal lines susceptible to noise are attached.

[0057] (Technology 3) An electrical component box according to Technology 1 or Technology 2, characterized in that, when viewed from the front, the second circuit board is positioned further back than the first circuit board, and the second circuit board is a circuit board to which no signal lines are attached. With this configuration, the first circuit board, which has signal lines susceptible to noise, can be placed in a location less affected by the reactor's noise, and the second circuit board, which does not have signal lines and is less susceptible to noise, does not require the same placement considerations as the first circuit board, thus making the internal layout of the electrical components box more efficient.

[0058] (Technology 4) An electrical component box for an indoor unit according to any one of Technical 1 to Technical 3, wherein an operation confirmation lamp is provided on the back side of the first circuit board, in a position that does not overlap with the first circuit board when viewed from the front. This configuration makes it easier to perform maintenance on the electrical components box while checking the operation of the indoor unit.

[0059] (Technology 5) The electrical component box according to any one of the technologies 1 to 4, characterized in that the sheet metal base is provided with a first fastener having an insertion opening for supporting the first substrate at the rear of the sheet metal base, and the first substrate is fixed to the sheet metal base by inserting the rear of the first substrate into the first fastener. With this configuration, while maintenance work tends to be difficult in the back of the electrical components box, the first circuit board can be easily positioned by simply inserting it into the first fastener, and the first circuit board can be easily attached and detached.

[0060] (Technology 6) The electrical component box according to any one of the technologies 1 to 5, characterized in that the sheet metal base is provided with a second fastener having a fixing portion for fixing the first substrate at the front of the sheet metal base, and the first substrate is fixed to the sheet metal base by fixing the front portion from the rear portion with the fixing portion. With this configuration, the first circuit board can be easily positioned at the back of the electrical component box by simply inserting it into the first fastener, while the first circuit board is fixed to the sheet metal base by the second fastener at the front of the first fastener. This allows for easy attachment and detachment of the first circuit board, as well as stable fixing of the first circuit board to the sheet metal base.

[0061] (Technology 7) An indoor unit equipped with an electrical component box as described in Technical 1 to Technical 6. With this configuration, the same effect can be obtained even in indoor units equipped with an electrical components box. [Industrial applicability]

[0062] As described above, this disclosure is suitably applicable, for example, to indoor units of air conditioning systems. [Explanation of Symbols]

[0063] 1 Indoor unit 10. Electrical component box 12 Electrical equipment cover 18 Aperture 18a Upper notch 18b Lower notch 20 PCB Sheet Metal Unit 30 First board 33 Electrolytic Capacitors 35 connectors 40 Sheet metal stand 41 Main part 43 1st fixed surface 45 Bent section 47 Second fixed surface 49 3rd fixed surface 50 First fastener 55 outlets 60 Second fastener 65 Engaging part 67 Fixtures 70 Reactors 73 Screws (for fastening) 80 Unit 2 82 Operation confirmation lamp 110 cabinets S Space θ: Bending angle between the main part and the first fixed surface

Claims

1. The device comprises a housing, a first circuit board positioned diagonally in the depth direction when viewed from the front inside the housing, a sheet metal base supporting the first circuit board, and a reactor positioned on the back side of the first circuit board. The fixing portion for detachably securing the reactor is provided in a position detached from the first substrate when viewed from the front. An electrical component box for an indoor unit, characterized in that the noise from the reactor is shielded by the sheet metal base to suppress its effect on the first circuit board.

2. The electrical component box according to claim 1, characterized in that the first circuit board is fitted with signal lines for sending and receiving signals to and from the outside.

3. In a front view, the second substrate is positioned further back than the first substrate. The electrical component box according to claim 2, characterized in that the second substrate is less susceptible to noise than the first substrate.

4. The electrical component box for the indoor unit according to claim 1, wherein an operation confirmation lamp is provided on the back side of the first circuit board, in a position that does not overlap with the first circuit board when viewed from the front.

5. The sheet metal base is provided with a first fastener having an insertion opening at the rear of the sheet metal base for supporting the first substrate, The electrical component box according to claim 1, characterized in that the first circuit board is fixed to the sheet metal base by inserting the rear part of the first circuit board into the first fastener.

6. The sheet metal base is equipped with a second fastener having a fixing portion for fixing the first substrate at the front of the sheet metal base, The electrical component box according to claim 5, characterized in that the first circuit board is fixed to the sheet metal base by fixing the front part from the rear part with the fixing part.

7. An indoor unit equipped with an electrical component box according to claims 1 to 6.

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