JP2016102614A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable electric wiring to be inserted into an insertion part of an electric component box irrespective of a wire diameter of the electric wiring and to restrict the amount of refrigerant immersed into the electric component box under utilization of the insertion part and without arranging any refrigerant immersion preventive structure in particular.SOLUTION: An insertion part 11a15 includes: an opening part 11a14 recessed and formed from a releasing side end part toward a printed circuit board PWB2; a first movable piece 11a11 and a second movable piece 11a12 extending from both sides 11a141 and 11a142 of the opening part 11a14 toward inside an electric component box 10 and having resiliency; and a guide wall 11a13 extending from a bottom part 11a143 of the opening part 11a14 toward inside of the electric component box 10. Electric wiring L inserted into the insertion part 11a15 is supported by the guide wall 11a13, held by the first movable piece 11a11 and the second movable piece 11a12, and enclosed by the insertion part 11a15 and an electric component box lid 12 installed at the electric component box main body 11 and a clearance among the insertion part 11a15, the electric component box lid 12 and the electric wiring L is made smaller than a prescribed effective diameter.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an indoor unit of an air conditioner including an electrical component box.

  An air conditioner is equipped with an electrical component box for air conditioning control in its indoor unit, but a printed circuit board mounted on the electrical component box incorporates many electrical components that can be a fire type. For this reason, when using a flammable refrigerant for the refrigeration cycle, when the refrigerant leaks from the pipe and enters the electrical component box, a fire may be caused if the concentration of the refrigerant exceeds a predetermined value.

  In order to prevent the occurrence of such a fire, the electrical component box may have a sealed structure so that the refrigerant does not enter the electrical component box.

  Therefore, conventionally, as described in Patent Document 1, an air flow passage that leads from the electrical component box to the outside is formed in the indoor unit, and when refrigerant enters the electrical component box, the air flow passage passes through the air flow passage. Thus, the concentration of the refrigerant remaining in the electrical component box is reduced to a predetermined value or less so that the refrigerant can be released to the outside.

Japanese Patent Laid-Open No. 11-094291

  However, in the configuration of Patent Document 1, it is necessary to form a special air flow passage, and it is desired that the amount of refrigerant entering the electrical component box can be regulated without such an air flow passage. . By the way, in order to insert wiring such as motor wiring into the electrical component box, an insertion part is formed in the electrical component box. When the type and thickness of the wiring inserted into the electrical component box differ for each indoor unit model, it is necessary to form the insertion portion of the electrical component box for each type and thickness of the wiring. In order to be able to use the insertion portion regardless of the type of wiring, for example, the insertion portion may be formed in accordance with the diameter of the maximum diameter wiring. However, since the size of the insertion portion is fixed, when a small-diameter wire is inserted into the insertion portion, the gap between the small-diameter wiring and the insertion portion is between the large-diameter wiring and the insertion portion. There is a possibility that a gap larger than this gap is formed, and the refrigerant enters the electrical component box from this large gap, so that the concentration of the refrigerant in the electrical component box reaches the ignition concentration. Therefore, it is necessary to provide a separate refrigerant intrusion prevention structure so that the refrigerant does not enter the electrical component box from this large gap.

  The object of the present invention is to allow the wiring to be inserted into the insertion portion of the electrical component box regardless of the wire diameter of the wiring, and to use this insertion portion without providing a special refrigerant intrusion prevention structure. An object of the present invention is to provide an indoor unit for an air conditioner that can regulate the amount of refrigerant entering the product box.

In order to achieve the above object, the present invention provides an indoor unit of an air conditioner including an electrical component box and a printed circuit board mounted on the electrical component box, wherein the electrical component box is mounted with the printed circuit board. An electrical component box body having a bottom plate and a peripheral wall plate surrounding the bottom plate; and an electrical component box lid for closing an open side of the space surrounded by the peripheral wall plate of the electrical component box body, Provided is an insertion part through which a wiring connected to the printed circuit board is formed by being cut out in a rectangular shape from the open side end part to the printed circuit board, and the insertion part extends from the open side end part to the printed circuit board. An opening formed by cutting out into a rectangular shape toward the printed circuit board, and a first movable piece and a second movable having elasticity extending from the both sides of the opening toward the inside of the electrical component box And the electrical equipment from the bottom of the opening A guide wall extending toward the inner side of the box; and the wiring inserted into the insertion portion is supported by the guide wall and sandwiched between the first movable piece and the second movable piece, and the insertion portion And the electrical component box lid mounted on the electrical component box body, and the gap between the insertion portion, the electrical component box lid, and the wiring is set to be smaller than a predetermined effective diameter. Features.
Further, the present invention is characterized in that the height of the insertion portion is set to a height corresponding to the wire diameter of the maximum diameter wire inserted through the insertion portion.

  According to the present invention, the amount of the refrigerant entering the electrical component box can be regulated by inserting the wiring through the insertion portion of the electrical component box without providing a special refrigerant intrusion prevention structure. In addition, when the wiring is sandwiched between the first movable piece and the second movable piece, the width between the first movable piece and the second movable piece can be varied according to the wiring having different wire diameters. Depending on the wire diameter, the gap between the insertion part, the electrical component box lid and the wiring can be made smaller than the predetermined effective diameter, and it can enter the electrical component box without providing a special refrigerant intrusion prevention structure. The amount of refrigerant can be regulated.

It is a perspective view of the right side part of the indoor unit of the air conditioner of one Example of this invention. It is a disassembled perspective view of the electrical component box integrated inside the front panel of the right part of the indoor unit. It is a perspective view of the state which removed the electrical component box cover, the display / reception case, and the human detection sensor from the electrical component box. It is a perspective view which shows the combination of the electrical component box main body and the electrical component box cover which removed the display / reception case and the human detection sensor. It is a left view of an electrical component box. It is sectional drawing of the AA line of FIG. It is explanatory drawing of the insertion part which penetrates wiring. It is explanatory drawing of the state which inserted and clamped the wiring to the insertion part.

  FIG. 1 shows a right side portion of an indoor unit of an air conditioner according to one embodiment of the present invention. 40 is a front panel that covers the outside of the components such as the heat exchanger and the electrical component box 10 to be described later, and is located on the right side of the center portion where the heat exchanger opening 41, the wind direction plate 42, the diffuser 43, etc. are provided. A region 44 for storing the electrical component box 10 is provided. 45 is a detachable maintenance cover for maintenance of the electrical component box 10 housed in the area 44, 46 is a display / reception unit in which a display / reception case 20 described later is disposed, and 47 is a person described later on the inner side. It is a human detection sensor decorative frame in which the detection sensor 30 is arranged.

  FIG. 2 shows a state where the electrical component box 10 is disassembled. The electrical component box 10 includes an electrical component box main body 11, an electrical component box lid 12, and a power cable attachment portion 13 integrated with the electrical component box main body 11. The electrical component box body 11, the electrical component box lid 12, and the power cable mounting portion 13 are made of resin. Among them, the electrical component box body 11 and the electrical component box lid 12 of the electrical component box 10 are heat resistant on the outer surface. And the sheet metal B (refer FIG. 6) for electromagnetic shielding is attached. The display / reception case 20 is attached to the power cable attaching portion 13, and the human detection sensor 30 is attached to the display / reception case 20.

  In the power cable attachment portion 13, by pressing a power cable (not shown) inserted from the lower side and drawn upward from the outlet 13a with the band 13b, the tip of the cable is connected to the terminal block 13c. A power cable is attached. The display / reception case 20 is attached by engaging the hook 13d of the power cable attachment portion 13 and the elastic piece 13e (see FIGS. 3, 4, and 5). The display / reception case 20 includes an LED group for displaying on / off of a power source, a current operation state, and the like, and a receiver for receiving a remote control signal (light or radio wave) transmitted by operating a remote controller. The display / reception unit 46 is disposed on the back surface of the front panel 40. The human detection sensor 30 is a sensor that detects whether or not there is a person in the vicinity of the indoor unit, and is arranged on the back side of the human detection sensor decoration frame 46. Note that the power cable attachment portion 13, the display / reception case 20, the human detection sensor 30, and the like are not related to the present invention, and thus detailed description thereof is omitted.

  The electrical component box body 11 is provided with a bottom plate 11f on which the first printed board PWB1 and the second printed board PWB2 are mounted, and a peripheral wall plate 11a surrounding the bottom plate 11f. The left wall plate 11a1 of the peripheral wall plate 11a is formed by cutting out from the end on the open side into a rectangular shape toward the second printed circuit board PWB2, for example, an insertion for inserting the motor wiring L Part 11a15 is provided. The insertion portion 11a15 includes an opening portion 11a14 formed by cutting out in a rectangular shape from the open end to the second printed circuit board PWB2. Further, the insertion portion 11a15 includes a first movable piece 11a11 and a second movable piece 11a12 that extend in an arc shape from the respective side portions 11a141 and 11a142 of the opening portion 11a14 toward the inside of the electrical component box 10 and have elasticity. ing. The first movable piece 11a11 and the second movable piece 11a12 contact each other when the motor wiring L is not inserted (FIG. 4), and the first movable piece 11a11 and the second movable piece 11a12 are elastically outward when the motor wiring L is inserted and clamped. spread. Further, the insertion portion 11a15 includes a guide wall 11a13 extending in a planar shape from the bottom portion 11a143 of the opening portion 11a14 toward the inside of the electrical component box 10. The motor wiring L is supported by the guide wall 11a13 and sandwiched between the first movable piece 11a11 and the second movable piece 11a12. As such wiring L, for example, two types of wiring are used: wiring L1 having a large diameter with a protective tube for insulation or wiring L2 having a small diameter without a protective tube (FIG. 7). reference). When the large-diameter wiring L1 or the small-diameter wiring L2 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12, the insertion portion 11a15 has the first movable piece 11a11 and the second movable piece 11a according to the respective wirings L1 and L2. The width between the pieces 11a12 is varied to become the widths H and H1 (FIG. 8). Width H1 when the small-diameter wiring L2 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12, and the width H when the large-diameter wiring L1 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12 Is also made small, the insertion portion 11a15 and the electrical component box lid 12 to be described later mounted on the electrical component box main body 11 can be formed on the clamping surface BB passing through the tip of the guide wall 11a13 parallel to the left wall plate 11a1. A gap with the small-diameter wiring L2 is formed to be smaller than a predetermined effective diameter (FIGS. 7 and 8). As will be described later, the predetermined effective diameter is set to a value that does not allow an amount of refrigerant to reach the ignition concentration in the electrical component box 10. As a result, the refrigerant entering the electrical component box 10 by the gap between the insertion portion 11a15, the electrical component box lid 12, and the large-diameter wiring L1, and the clearance between the insertion portion 11a15, the electrical component box lid 12, and the small-diameter wiring L2. Regulate the amount of Moreover, tongue pieces 11a21 and 11a22 for attaching the electrical component box lid 12 are formed on the lower wall plate 11a2 in the peripheral wall plate 11a.

  In addition, in the interior surrounded by the peripheral wall plate 11a, the mounting region of the first printed circuit board PWB1 is partitioned by the peripheral wall plate 11a, the first vertical wall plate 11b, the first horizontal wall plate 11c, and the second horizontal wall plate 11d. Furthermore, the mounting area of the second printed circuit board PWB2 is partitioned by the wall plate 11a, the first vertical wall plate 11b, the second horizontal wall plate 11d, and the second vertical wall plate 11e. A mica sheet MS is affixed to the wall surface of the first vertical wall plate 11b on the side where the second printed circuit board PWB2 is mounted. This mica sheet MS is for electrically insulating the first printed circuit board PWB1 side and the second printed circuit board PWB2 side.

  The area where the first printed circuit board PWB1 is mounted corresponds to the size of the first printed circuit board PWB1 by the peripheral wall plate 11a, the first vertical wall plate 11b, the first horizontal wall plate 11c, and the second horizontal wall plate 11d. It is divided into areas. The lower end of the first vertical wall plate 11b and the second horizontal wall plate 11d are not in direct contact with each other, and a space SP for wiring passage and air circulation is formed there.

  A buzzer BZ is mounted on the first printed circuit board PWB1 at the back corner portion close to the inner angle between the first vertical wall plate 11b and the first horizontal wall plate 11c (FIG. 4). This buzzer BZ is sounded when the receiver of the display / reception case 20 of the indoor unit receives an operation signal from the remote controller, and is used for confirmation of the reception.

  The electrical component box lid 12 has a size corresponding to the electrical component box body 11. When the electrical component box lid 12 is mounted on the electrical component box body 11, the upper side of the opening 11a14 of the insertion portion 11a15 is closed by the electrical component box lid 12, and the upper sides of the first movable piece 11a11 and the second movable piece 11a12 are Covered. For this reason, the wiring L of the motor inserted through the insertion portion 11a15 is surrounded by the first movable piece 11a11, the second movable piece 11a12, the guide wall 11a13, and the electrical component box lid 12. The electrical component box lid 12 is formed with engaging portions 12b and 12c that engage with the tongue pieces 11a21 and 11a22 of the electrical component box body 11.

  Now, when closing the electrical component box body 11 of the electrical component box 10 with the electrical component box lid 12, in the electrical component box body 11, all wiring connections relating to the first printed circuit board PWB1 and the second printed circuit board PWB2 are connected in advance. The large-diameter wire L1 or the small-diameter wire L2 is drawn in along the guide wall 11a13 from the insertion portion 11a15, and the large-diameter wire L1 or the small-diameter wire L2 is connected to the first movable piece 11a11 and the second movable piece 11a11. It is held between the pieces 11a12 and electrically connected to the first printed circuit board PWB1 (FIGS. 6 and 7). The electrical component box lid 12 is aligned so that the engaging portions 12b and 12c engage with the tongues 11a21 and 11a22 of the electrical component box body 11, and then the electrical component box lid 12 is moved to the electrical component box. Cover the main body 11.

  As described above, the insertion portion 11a15 of the peripheral wall plate 11a of the electrical component box body 11 includes the first movable piece 11a11 and the second movable piece 11a12 on both side portions 11a141 and 11a142 of the opening portion 11a14, and the opening portion 11a14. Since the guide wall 11a13 is provided on the bottom portion 11a143, the large-diameter wire L1 or the small-diameter wire L2 is connected to the guide wall 11a13 regardless of which of the large-diameter wire L1 or the small-diameter wire L2 is used. While supporting, it is possible to hold the large-diameter wiring L1 or the small-diameter wiring L2 between the first movable piece 11a11 and the second movable piece 11a12 (FIGS. 7 and 8). Further, the insertion portion 11a15 has the width H1 of the first movable piece 11a11 and the second movable piece 11a12 when the small-diameter wire L2 is sandwiched, and the first movable piece 11a11 and the second movable member 11a11 when the large-diameter wire L2 is sandwiched. While making it smaller than the width H of the movable piece 11a12, the height from the guide wall 11a13 to the open end of the left wall plate 11a1 is formed to a height F corresponding to the wire diameter of the large-diameter wiring L1. (FIG. 8). Accordingly, when the large-diameter wiring L1 or the small-diameter wiring L2 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12 and the electrical component box body 11 is closed by the electrical component box lid 12, the insertion portion 11a15 and the electrical component are connected. The gap between the product box lid 12 and the large-diameter wiring L1 and the gap between the insertion portion 11a15, the electrical component box lid 12 and the small-diameter wiring L2 can be minimized. As a result, the amount of refrigerant entering the electrical component box 10 can be regulated so that the refrigerant concentration in the electrical component box 10 does not rise above a predetermined value (FIGS. 5, 6, and 7). ).

  In other words, in the present embodiment, the insertion portion 11a15 has a large diameter wiring L1 or a small diameter wiring L2 when the large diameter wiring L1 or the small diameter wiring L2 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12. Since the width of the first movable piece 11a11 and the second movable piece 11a12 can be set to the width H or the width H1, depending on the wire diameter, the motor wiring L can be connected to the electrical equipment regardless of the wire diameter of the motor wiring L. The insertion portion 11a15 of the box 10 can be inserted, and this insertion portion 11a15 can be used to regulate the amount of refrigerant entering the electrical component box 10 without providing a special refrigerant intrusion prevention structure. It is. Further, since the guide wall 11a13 can draw the motor wiring L into the electrical component box 10 and support it regardless of the type of the motor wiring L, the first movable piece 11a11 and the second movable piece 11a13. 11a12 makes it possible to hold the motor wiring L toward the inside of the electrical component box 10 without misalignment.

  Next, a gap that can regulate the amount of refrigerant that enters the electrical component box 10 will be described with reference to FIGS. 7 and 8. The gap between the insertion portion 11a15, the electrical component box lid 12, and the large-diameter wire L1 that can be formed on the sandwiching surface BB passing through the tip of the guide wall 11a13 parallel to the left wall plate 11a1 is the wire of the large-diameter wire L1. It is determined from the height F of the insertion portion 11a15 corresponding to the diameter and the width H between the first movable piece 11a11 and the second movable piece 11a12 corresponding to the wire diameter of the large-diameter wiring L1, and the large-diameter wiring L1 The gaps S1 and S2 are distributed in the vertical direction. As the size of the gap S1 and the gap S2, for example, when the refrigerant is R32, the effective diameter R is desirably 3 mm or less, and the effective diameter R is obtained by “R = 4 × S / K”. S is the area of the gap S1 or S2, and K is the perimeter of the area. For this reason, the gap S1 and the gap S2 can be set to the size of the gap where the concentration of the refrigerant entering the electrical component box 10 does not rise above a predetermined value (FIGS. 7A and 8A). ).

On the other hand, the gap between the insertion portion 11a15, the electrical component box lid 12, and the small-diameter wire L2 that can be formed on the sandwiching surface BB passing through the tip of the guide wall 11a13 parallel to the left wall plate 11a1 is that of the large-diameter wire L1. It is determined from the height F of the insertion portion 11a15 corresponding to the wire diameter and the width H1 between the first movable piece 11a11 and the second movable piece 11a12 corresponding to the wire diameter of the small-diameter wire L2, and the small-diameter wire L2 The gaps S3, S4, S5, and S6 are dispersed vertically. For this reason, when the small-diameter wiring L2 is supported by the guide wall 11a13 and is sandwiched between the first movable piece 11a11 and the second movable piece 11a12, the upper gap S3 of the small-diameter wiring L2 is smaller than the lower gap S4. Becomes a wider gap. However, since the clearance S3 and the clearance S4 have the effective diameter R set in the same manner as described above, it is possible to make the clearance such that the concentration of the refrigerant entering the electrical component box 10 does not rise above a predetermined value. (FIG. 7 (c) and FIG. 8 (b)). When the small-diameter wiring L2 is sandwiched between the first movable piece 11a11 and the second movable piece 11a12, the upper gap S5 and the lower gap S6 of the small-diameter wiring L2 have the above-mentioned small diameter. Since the gap L3 is narrower than the gap S3 on the upper side of the wiring L2, the size of the gap can be made such that the concentration of the refrigerant entering the electrical component box does not rise above a predetermined value (FIGS. 7C and 8C). c)).
Thus, the electrical component box can be used without providing a special refrigerant intrusion prevention structure using the gaps S1 to S6 between the insertion portion 11a15, the electrical component box lid 12, and the large-diameter wire L1 or the small-diameter wire L2. It becomes possible to regulate the amount of the refrigerant that enters the inside 10.

  As described above, even when the refrigerant leaks from the refrigerant pipe, the gap between the insertion portion 11a15, the electrical component box lid 12, and the motor wiring L is set to be equal to or smaller than a predetermined effective diameter. Becomes difficult to enter the electrical component box 10, the refrigerant concentration in the electrical component box 10 can be regulated to an ignition concentration or less, and explosion prevention of the electrical component box 10 can be realized. Explaining in detail that the gap is not more than a predetermined effective diameter, if the flame generated in the electrical component box 10 in consideration of the properties of the refrigerant is an effective diameter that does not spread to the outside of the electrical component box 10, Even if an electrical component in the electrical component box 10 is ignited, it is possible to prevent the fire spreading to the outside of the electrical component box 10. Therefore, the above-mentioned predetermined effective diameter is compared with the effective diameter for preventing the spread of fire, and the smaller value is set as the predetermined effective diameter, and the insertion portion 11a15, the electrical component box cover 12, and the wiring of the motor are based on the predetermined effective diameter. By adjusting the gap with L, both the penetration of the refrigerant into the electrical component box 10 and the spread of flames outside the electrical component box 10 can be prevented. In addition, the electrical component box 10 can be cooled by the air passing through the gap by using the gap that is equal to or less than the predetermined effective diameter described above, and the electricity mounted on the first printed board PWB1 and the second printed board PWB2 is used. It is also possible to effectively dissipate heat generated by the parts. Further, the insertion portion 11a15 is a wiring that clamps the large-diameter wiring L1 or the small-diameter wiring L2 by a clamping force that sandwiches the large-diameter wiring L1 or the small-diameter wiring L2 between the first movable piece 11a11 and the second movable piece 11a12. The role of the clamper can be given, and there is no need to provide a separate wiring clamper.

  When the electrical component box body 11 is closed by the electrical component box lid 12, the bottom plate 11f of the electrical component box body 11, a part of the peripheral wall plate 11a, the first vertical wall plate 11b, the first horizontal wall plate 11c, and the second horizontal wall. The plate 11d and the electrical component box lid 12 are confined in a resonance chamber RES formed as a space of substantially the same size corresponding to the first printed circuit board PWB1.

  For this reason, when the buzzer BZ mounted in the back corner of the first printed circuit board PWB1 rings, a large reverberant sound is generated as compared with the case where there is no resonance chamber RES surrounding the buzzer BZ.

  From the above, since the sound of the buzzer BZ can be increased, it is possible to reduce the original sound volume actually generated by the buzzer BZ. That is, it is possible to use a buzzer BZ that is smaller than the conventional one, and cost can be reduced.

  The arrangement position of the buzzer BZ is not limited to the inner angle of the first vertical wall plate 11b and the first horizontal wall plate 11c, but a part of the peripheral wall plate 11a surrounding the first printed circuit board PWB1, the first vertical wall plate 11b, What is necessary is just to arrange | position in the vicinity of the 1st horizontal wall board 11c, the 2nd horizontal wall board 11d, etc.

  In the present embodiment described above, the motor wiring L uses two types of large-diameter wiring L1 provided with a protective tube and small-diameter wiring L2 without a protective tube. However, in the present invention, two types of wiring are used. Not only wiring but large diameter wiring without protective tube (same diameter as wiring L1) or medium diameter wiring without protective tube (larger than wiring L2 and smaller than wiring L1) Multiple types of wiring such as (diameter) can be used. In the present embodiment, the insertion portion 11a15 is formed with the first movable piece 11a11 and the second movable piece 11a12 on both side portions 11a141 and 11a142 of the opening portion 11a14. However, the present invention is not limited to this, and the insertion portion 11a15 A movable piece may be formed on the upper and lower sides. In this case, for example, guide walls are formed on both sides of the opening portion 11a14 of the insertion portion 11a15, a first movable piece is formed on the bottom portion of the opening portion 11a14 of the insertion portion 11a15, and above the opening portion 11a14 of the insertion portion 11a15. What is necessary is just to form a 2nd movable piece in the left end part of the electrical component box cover 12 located.

  Furthermore, in this embodiment, the insertion portion 11a15 is formed such that the height from the guide wall 11a13 to the open end of the left wall plate 11a1 is a height F corresponding to the wire diameter of the large-diameter wiring L1. The present invention is not limited to this, and the insertion portion does not form the guide wall 11a13, but extends from the bottom plate 11f of the electrical component box body 11 to the open end of the left wall plate 11a1, and the electrical component box body 11 From the bottom plate 11f to the open end of the left wall plate 11a1 may be the height of the insertion portion. In this case, for example, when the motor wiring L is inserted into the insertion portion to the position of the bottom plate 11f of the electrical component box body 11, the electrical component box 10 is formed from the gap between the insertion portion, the electrical component box lid 12, and the motor wiring L. In order to regulate the amount of refrigerant entering the interior, a shutter plate that closes so as to cover the open side of the insertion portion may be formed at the left end of the electrical component box lid 12.

PWB1: first printed circuit board, PWB2: second printed circuit board, RES: resonance chamber, MS: mica sheet, BZ: buzzer, SP: space, B: sheet metal, L: wiring, L1: large diameter wiring, L2 : Small diameter wiring, F: Height, H: Width corresponding to large diameter wiring, H1: Width corresponding to small diameter wiring, S1, S2: Gap between insertion part and large diameter wiring, S3 to S6: 10: Electrical component box 11: Electrical component box body, 11a: Perimeter wall plate, 11a1: Left wall plate, 11a11: First movable piece, 11a12: Second movable piece, 11a13: Guide wall 11a14: opening, 11a141, 11a142: both sides, 11a143: bottom, 11a15: insertion part, 11a2: lower wall plate, 11a21, 11a22: tongue, 11b: first vertical wall plate, 11c: first horizontal wall plate, 11d: 2nd horizontal wall board 11e: second vertical wall plate, 11f: bottom plate 12: electrical component box cover, 12b, 12c: engagement portion 13: power cable attachment portion, 13a: outlet, 13b: band, 13c: terminal block, 13d: hook, 13e: elastic piece 20: display / reception case 30: human detection sensor 40: front panel, 41: heat exchanger opening, 42: wind direction plate, 43: diffuser, 44: electrical component box storage area, 45: maintenance lid, 46: display / reception unit, 46: human detection sensor decoration frame

Claims (2)

In an indoor unit of an air conditioner equipped with an electrical component box and a printed circuit board mounted on the electrical component box,
The electrical component box closes an electrical component box body having a bottom plate on which the printed circuit board is mounted and a peripheral wall plate surrounding the bottom plate, and an open side of a space surrounded by the peripheral wall plate of the electrical component box main body. An electrical component box lid,
The peripheral wall plate is provided with an insertion portion through which a wiring connected to the printed circuit board is inserted by being cut out in a rectangular shape from the open end to the printed circuit board.
The insertion portion extends from the open end to the printed circuit board in a rectangular shape and extends from the both sides of the opening toward the inside of the electrical component box. A first movable piece and a second movable piece having elasticity, and a guide wall extending from the bottom of the opening toward the inside of the electrical component box,
The electrical component box lid mounted on the insertion portion and the electrical component box main body is supported by the guide wall and sandwiched between the first movable piece and the second movable piece, while the wiring inserted into the insertion portion is supported by the guide wall. Surrounded by
An indoor unit of an air conditioner, wherein a gap between the insertion portion, the electrical component box cover, and the wiring is set to be smaller than a predetermined effective diameter.   The indoor unit of an air conditioner according to claim 1, wherein the height of the insertion part is set to a height corresponding to the wire diameter of the maximum diameter wiring inserted through the insertion part.

Images