JP3749164B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an electrical box of an air conditioner.
[0002]
[Prior art]
In general, in the main body of an air conditioner, mechanical components such as a blower and a heat exchanger as well as electrical control components that drive and control them are housed.
[0003]
The electrical component is housed in a main body in a box generally called an electrical component box. FIG. 8 is a front view schematically showing an example of a conventional electrical box. A conventional electrical box 71 is provided with a control board 72 and terminal blocks 73 and 74, and a fixing portion 76 for connecting a ground wire 75 is provided in the vicinity of one terminal block 74. An open surface of the electrical box 71 is provided with an inner lid 77 which is disposed on the open surface and exposes the terminal blocks 73 and 74 on the surface. The surface of the inner lid 77 is isolated from the control board 72 and has a terminal. Cables 77 and 78 connected to the bases 73 and 74 and a ground wire 75 are wired.
[0004]
[Problems to be solved by the invention]
By the way, at the time of inspection / repair of the control board 72, the inner lid 77 is removed and the control board 72 in the electrical box 71 is taken out for inspection / repair. At this time, since the cables 78 and 79 connected to the terminal blocks 73 and 74 and the ground wire 75 are attached and detached, the attachment and detachment work of the cables 78 and 79 and the ground wire 75 is facilitated to facilitate inspection and repair work. It is requested to do.
[0005]
The present invention has been made in view of the above, and provides an air conditioner that facilitates the inspection and repair of control boards and the like provided in an electrical box by facilitating the attachment and detachment of cables and ground wires. The purpose is to do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 comprises an electrical box provided with an open surface for storing a control board, operation switches, and the like, and an inner lid disposed on the open surface. In the air conditioner, the inner lid has a switch cover part provided with an opening through which the operation switch is exposed, and a ground wire fixing part is provided on a side wall of the switch cover part.
[0007]
According to a second aspect of the present invention, in the air conditioner according to the first aspect, a ground connection fitting is screwed and fixed to the fixing portion of the ground wire, and one side edge of the ground connection fitting is a switch cover portion. It abuts on the side wall.
[0008]
According to a third aspect of the present invention, in the air conditioner according to the second aspect, the inner lid is provided with a rib that abuts against another side edge of the ground connection fitting.
[0009]
4. The air conditioner according to claim 1, wherein the fixing portion of the ground wire is provided in the vicinity of an edge of the inner lid into which the ground wire is drawn.
[0010]
According to a fifth aspect of the present invention, in the air conditioner according to the fourth aspect, a screw connection terminal is fastened to the tip of the ground wire connected to the fixing portion of the ground wire.
[0011]
According to a sixth aspect of the present invention, in the air conditioner according to the fifth aspect, when the screw connection terminal is connected to the fixed portion of the ground wire, the fastening portion of the terminal is on the side wall of the switch cover portion. The contact is possible.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. 1 is an exploded perspective view showing an indoor unit of an air conditioner according to an embodiment of the present invention, FIG. 2 is a front view in which an inner lid is mounted on an electrical box, FIG. 3 is a front view of the inner lid, and FIG. FIG. 5 is a front view in which an outer lid is attached to the electrical box, and FIG. 6 is a front view of the outer lid.
[0013]
In FIG. 1, 1A shows the rigid synthetic resin main body frame of the indoor unit 1 of the separation type air conditioner, and the indoor heat exchanger 2 is housed on the left side of the front center. An electrical box 3 is attached to the right side of the heat exchanger 2 between the right side surface of the main body frame 1A, and a hard resin drain pan 4 is provided below the heat exchanger 2 on the left and right. Yes.
[0014]
The heat exchanger 2 includes a plurality of heat exchange fins 6 arranged between the left and right tube plates 5 at predetermined intervals, and a refrigerant pipe 7 through which refrigerant flows by being connected to an outdoor unit (condensing unit) (not shown). And a hot water pipe 9 connected to an outdoor boiler (not shown) via a flow rate variable valve 8 and through which hot water flows. The refrigerant pipe 7 and the hot water pipe 9 penetrate the tube plate 5 and the heat exchange fins 6.
[0015]
A cross flow fan 14 is disposed at the lower rear of the main body frame 1A, and this fan 14 is rotationally driven by a motor 14M attached to the electrical box 3 side.
[0016]
The drain pan 4 receives condensed water dripping from the heat exchanger 2 during cooling operation and dry operation. The drain pan 4 is provided with a water level sensor 15 for detecting full water due to clogging. A drain hose 16 is connected to the drainage port 4 </ b> A of 4 and is drawn backward.
[0017]
1 and 2, the electrical box 3 is a box made of hard synthetic resin, opened to the front, vertically long and long in depth, with a terminal block storage 17 at the top and a substrate storage 18 from the center to the bottom. A guide rail (not shown) is formed on the upper and lower inner surfaces of the substrate storage portion 18 in the front-rear direction. Two terminal blocks 22 and 23 of 3P and 2P are mounted side by side in the terminal block storage part 17, the control board 24 is vertically oriented on the board storage part 18, and the upper and lower edges of the control board 24 are used as guide rails. Engaged and slidably stored.
[0018]
Main body fixing portions 25a, 25b, and 25c for fixing the electric box 3 to the main body frame 1A are provided at one place on the upper left side surface of the electric box 3 and two upper and lower sides on the right side. A sensor fixing part 26 for attaching 26a is provided, a mounting screw boss 27 is provided at the lower part of the electrical box 3, and an inter-unit cable 28 wired between the indoor unit 1 and the outdoor unit is connected to the rear part from the rear. A cable fixing portion 29 for fixing is provided.
[0019]
2 and 3, an inner lid 31 is attached to the front opening surface of the electrical box 3. As shown in FIG. 3, the inner lid 31 covers the open surface of the electrical box 3, and a terminal block cover portion 32 is formed on the upper portion, a cable passage portion 33 is formed on the left side from the center to the lower portion, and a switch cover portion 34 is formed on the right side. Has been. Below the terminal block cover portion 32, there is a terminal block opening 35 that exposes the lower portions of the 3P / 2P terminal blocks 22 and 23 to the surface. The switch cover portion 34 is formed in a convex shape with a vertically long rectangle, and has two openings 39, 39 for exposing an address switch 37 and a test operation switch 38 which are attached to the control board 24 and operated from the front. is doing. On the left side of the switch cover portion 34, a horizontal bar 41 is formed extending in the left direction from the center portion of the left side wall 34a to sandwich the cable. At the lower part of the cable passage portion 33, a grounding boss (grounding) having a rib 44 on the left side with a predetermined distance from the left side wall 34a and a screw hole at a position close to the left side wall 34a of the switch cover portion 34. Line fixing portion) 43 is formed. A ground connection fitting (ground wire fixing portion) 45 is fixed to the boss 43 with screws.
[0020]
4 and 7, the ground connection fitting 45 has a vertically long rectangular metal plate formed with two upper and lower circular holes 46a and 46b, and a right edge and a lower edge bent backward in an L shape. Yes. A hole 46b below the ground connection fitting 45 is screwed and fixed to the ground mounting boss 43 (see FIG. 3) together with two relay ground wires 47e and 47p with mounting screws. At the time of fixing by screwing, the right edge of the ground connection fitting 45 comes into contact with the left side wall 34a of the switch cover portion 34 and the left edge comes into contact with the rib 44. Therefore, the rotation of the ground connection fitting 45 is easily suppressed. Can be fixed to. One of the relay ground wires 47e and 47p is connected to the heat exchanger 2 and the other is connected to the control board 24, and is wired and connected from the lower edge of the inner lid 31 through the back side of the inner lid 31. This connection work is performed when the indoor unit 1 is manufactured.
[0021]
A ground screw 49 is attached to the hole 46 a above the ground connection fitting 45. An earth wire 48 is connected to the earth screw 49 when the air conditioner is installed. The earth wire 48 is drawn from the rear of the indoor unit 1 and connected through the lower part of the electrical box 3 and the lower edge of the inner lid 31. Is done. When the round terminal 50 is fastened to the ground wire 48, the fastening portion of the round terminal 50 comes into contact with the left side wall 34 a of the switch cover portion 34 to suppress the rotation of the round terminal 50. Line 48 can be easily attached.
[0022]
Engaging portions 52, 53, 54 that engage with both side plates of the electrical box 3 are provided on the upper edge and both side edges of the inner lid 31, and by engaging these, the inner lid 31 is engaged with the electrical box 3. Stopped. Further, an engaging portion 55 for locking the outer lid 51 covering the inner lid 31 is provided at the upper right portion of the inner lid 31. The address switch 37 is, for example, a setting switch that enables remote control of these air conditioners individually when a plurality of air conditioners are installed in the same room. The trial operation switch 38 is a switch used when the heating or cooling operation is forcibly performed.
[0023]
Holes for connecting cables of the terminal blocks 22 and 23 are exposed in the terminal block opening 35 of the inner lid 31. The inter-unit cable 28 is connected to this hole. The inter-unit cable 28 is drawn into the indoor unit 1 from the outdoor unit through the wall hole of the room, fixed to the cable fixing part 29 of the electrical box 3, and drawn into the electrical box 3 through the lower part of the electrical box 3. Furthermore, it passes through the cable passage portion 33, is sandwiched between the horizontal bars 41, and is connected to the 3P and 2P terminal blocks 22 and 23.
[0024]
5 and 6, an outer lid 51 is attached in front of the inner lid 31. The outer lid 51 covers the terminal block opening 35 and the cable passage portion 33 of the inner lid 31. Engaging portions 56 and 57 that engage with the electrical equipment box 3 are formed on both edges of the outer lid 51, and screw holes 58 are formed in the lower portion. The outer lid 51 is engaged with the engaging portion 55 of the inner lid 31, the engaging portions 56 and 57 are engaged with the electrical box 3, and the screw hole 58 is attached to the mounting screw boss 27 with an attachment screw. By being fixed with screws, the electric box 3 is firmly fixed.
[0025]
As shown in FIG. 1, a main body cover 61 is attached to the front side of the main body frame 1 </ b> A so as to conceal parts such as the mechanism parts and the electrical control parts configured as described above. A lattice-shaped opening is formed at the front center portion of the main body cover 61 corresponding to the front of the heat exchanger 2, and an opening 62 is formed on the right side of the main body cover 61 corresponding to the front surface of the electrical box 3. The switches 37 and 38 provided on the front surface of the electrical box 3 can be operated through the opening 62. A front grill 64 having a plurality of slit-like suction ports 63 is attached to the front of the main body cover 61, and the front grill 64 is attached to the main body cover 61 so as to be rotatable about the upper side. Two filters 65 are provided on the left and right between the front grill 64 and the main body cover 61, and these filters 65 are held by the main body cover 61 so that they can be inserted and removed downward.
[0026]
A blower outlet 66 is formed in the lower part of the main body cover 61 on the left and right, and a plurality of left and right airflow direction adjusting blades 67 are rotatably attached to the blower outlet 66. Further, a flap 68 for adjusting the vertical blowing direction is attached to the outlet 66, and this flap 68 is driven by a flap motor 68M at the right end.
[0027]
As described above, the air conditioner of the present embodiment includes the electrical box 3 in which the control board 24 and the operation switches 37 and 38 are accommodated, and the inner lid 31 that covers the open surface of the electrical box 3. Since the switch cover part 34 and the rib 44 formed in a convex shape on the inner lid 31 are provided, and the ground attachment boss 43 having the rectangular ground connection fitting 45 is provided between them, the ground connection fitting 45 is The left and right edges of the switch cover 34 are pressed against the side walls 34a and the ribs 44 of the switch cover 34, and can be easily screwed and fixed.
[0028]
In addition, three ground wires 47e, 47p, and 48 are connected to the ground mounting boss 43, and the ground mounting boss 43 is provided near the lower edge of the inner lid 31 into which the ground wire is drawn. The inner lid 31 can be removed while the ground wires 47e, 47p, 48 are connected, the inspection and repair work of the control board 24 and the like can be reduced, and the inspection and repair of the control board 24 can be facilitated.
[0029]
In addition, since the inter-unit cable 28 and the ground wire 48 are separated from the electrical components such as the control board 24 in the electrical box 3 by the inner lid 31, the control board 24 and the like are removed when the inter-unit cable 28 and the ground wire 48 are attached and detached. It can be kept safe without damaging electrical components.
[0030]
As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this.
[0031]
In the present embodiment, the separation-type wall-mounted air conditioner has been described, but an integrated air conditioner, an embedded air conditioner, or a ceiling cassette type air conditioner may be used.
[0032]
【The invention's effect】
As described above, the air conditioner of the present invention includes an electrical box that houses a control board, operation switches, and the like, and an inner lid that covers the open surface of the electrical box, and is formed in a convex shape on the inner lid. Since the switch cover part and the rib are provided, and the ground wire fixing part having the ground connection metal fitting is provided between them, the ground connection metal fitting is held down with both edges in contact with the switch cover part and the rib. Screwing work can be facilitated. Further, by fastening the connection terminal to the ground wire fixed to the fixed portion of the ground wire, the fastening portion of this terminal is pressed against the side wall of the switch cover portion to facilitate the connection of the ground wire. be able to.
[0033]
In addition, three ground wires are connected to the fixed portion of the ground wire, and the fixed portion of the ground wire is provided near the edge of the inner lid into which the ground wire is drawn, so that these ground wires are connected, The inner lid can be removed, and inspection and repair work of the control board can be facilitated.
[0034]
In addition, the ground wire to be installed when installing the air conditioner and the electrical components such as the control board in the electrical box are separated by the inner lid, so that the external force applied to the ground wire is kept safe without the addition of the control board etc. be able to.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an indoor unit of an air conditioner according to an embodiment of the present invention.
FIG. 2 is a front view in which an inner lid is attached to the electrical box shown in FIG.
3 is a front view of the inner lid of FIG. 2. FIG.
4 is a front view in which a cable is connected to the electrical box shown in FIG. 2. FIG.
5 is a front view in which an outer lid is attached to the electrical box shown in FIG. 1. FIG.
6 is a front view of the outer lid of FIG. 5. FIG.
FIG. 7 is a perspective view of a ground connection fitting.
FIG. 8 is a front view schematically showing an example of a conventional electrical equipment box.
[Explanation of symbols]
3 Electrical box 24 Control board 27 Screw mounting boss 28 Unit-to-unit cable 31 Middle cover 33 Cable passage 34 Switch cover 34a Side wall 37 Address switch 38 Trial operation switch 39 Opening 43 Ground mounting boss (ground wire fixing part)
44 Rib 45 Ground connection bracket (Fixing section for ground wire)
47e, 47p Ground wire for relay 48 Ground wire 51 Outer cover 61 Body cover 62 Opening

Claims (6)

In an air conditioner comprising an electrical box provided with an open surface for storing a control board, operation switches, etc., and an inner lid disposed on the open surface,
An air conditioner having a switch cover portion provided with an opening through which the operation switch is exposed in the inner lid, and a ground wire fixing portion provided on a side wall of the switch cover portion. 2. The air conditioner according to claim 1, wherein a ground connection fitting is screwed and fixed to the fixing portion of the ground wire, and one side edge of the ground connection fitting is in contact with a side wall of the switch cover portion. The air conditioner according to claim 2, wherein a rib that contacts the other side edge of the ground connection fitting is provided on the inner lid. The air conditioner according to any one of claims 1 to 3, wherein the fixing portion of the ground wire is provided in the vicinity of the edge of the inner lid into which the ground wire is drawn. The air conditioner according to claim 4, wherein a screw connection terminal is fastened to a tip of the ground wire connected to the fixed portion of the ground wire. 6. The air conditioner according to claim 5, wherein when the screw connection terminal is connected to a fixed portion of a ground wire, a fastening portion of the terminal can be brought into contact with a side wall of the switch cover portion.

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