JP6064659B2 - Air conditioner - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner, and in particular, to a structure of an electrical component box disposed inside a main body.

  The conventional indoor unit of an air conditioner has a main body with a design panel that covers parts such as an internal heat exchanger on the front side, a suction port for sucking indoor air on the top surface, and a heat exchanger on the lower front surface. It has a blower outlet that blows out the air heat-exchanged with the refrigerant into the room. In addition to the heat exchanger, the main body includes a blower fan that sucks and blows out indoor air, and a fan casing that forms an air passage that guides the air that has passed through the heat exchanger and the blower fan to the air outlet. It has a structure. This fan casing accommodates the blower fan in a shape that is longer in the left-right direction than in the up-down direction. Further, an electrical component box for driving a blower fan or the like is disposed inside the main body on the right side of the air passage of the fan casing.

  This electrical component box has a terminal block case made of flame-retardant resin that has an opening that exposes the terminal block and accommodates the control board and terminal block, and a terminal block that is attached to the terminal block case and covers the terminal block that is visible from the opening. A structure including a first terminal block cover made of a flammable resin and a metal second terminal block cover that covers the first terminal block cover is known (for example, see Patent Document 1). As in Patent Document 1, the first terminal block cover made of flame retardant resin is covered with the second terminal block cover made of metal, and the first terminal block cover and the second terminal block cover are attached to the terminal block case to attach the terminal block. By covering, flames do not leak from the electrical component box in the event of a fire from a terminal block or the like due to tracking or short-circuiting, and the spread of fire to the main body or design panel can be prevented.

JP 2011-106753 A

By the way, the first terminal block cover close to the terminal block attached to the terminal block case is made of metal to stop the flame from the terminal block in the electrical component box and minimize the influence on the main body and design panel. Consider the case where the second terminal block cover that covers the first terminal block cover is made of resin. When the terminal block is covered with a metal first terminal block cover, the first terminal block cover is a thin sheet metal when the terminal block case is surrounded by the terminal block case that surrounds the terminal block. The contact area is small, and the joint between the terminal block case and the first terminal block cover may not be in full contact. In the unlikely event that the terminal block ignites due to tracking or short-circuiting, the flame from the joint May leak to the outside.
In view of the above problems, when the first terminal block cover is attached to the terminal block case, the present invention makes the contact between the terminal block case and the first terminal block cover good, and fires from the terminal block by tracking or shorting. In this case, an object is to provide an air conditioner that prevents a flame from leaking outside.

  In order to solve the above problems, an air conditioner of the present invention includes a heat exchanger, a blower fan, and an electrical component box in a main body, and the electrical component box is a terminal block for connecting a cable led out of the main body. And a terminal block cover that covers the front surface of the terminal block and is attached to the terminal block case. The terminal block case has a flat portion at the upper end. A metal first terminal block cover that covers the terminal block and has a flat portion that overlaps the flat portion of the terminal block case at the upper end, and a contact portion that covers the first terminal block cover and contacts the flat portion of the first terminal block cover And a resin-made second terminal block cover.

  According to the air conditioner of the present invention, when the first terminal block cover is attached to the terminal block case, the contact between the terminal block case and the first terminal block cover is good, and should be ignited from the terminal block by tracking or short-circuiting. In this case, it is possible to prevent the flame from leaking to the outside.

It is explanatory drawing which shows the indoor unit of the air conditioner by this invention, (a) is an external appearance perspective view, (b) is sectional drawing. It is an external appearance perspective view which shows the state which removed the main body in FIG. It is explanatory drawing which shows the electrical component box in FIG. 2, (a) is a disassembled perspective view, (b) is the disassembled perspective view which looked at the terminal block cover in (a) from another angle. It is explanatory drawing which shows the state which removed the terminal block cover from the terminal block case of the electrical component box, (a) is an exploded sectional view, (b) is the elements on larger scale of (a). It is a partial expanded sectional view which shows the state which attached the terminal block cover to the terminal block case of the electrical component box.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As an indoor unit of an air conditioner according to the present embodiment, a wall-mounted indoor unit 1 will be described as an example as shown in FIGS. 1 to 5. As shown in FIG. 1 and FIG. 2, the indoor unit 1 includes a box-shaped main body 10 that is longer in the left-right direction than in the up-down direction. An air outlet 12 is formed. Inside the main body 10, a heat exchanger 20, a blower fan 30, and a fan casing 40 are arranged in an air passage 13 connecting the suction port 11 and the blower outlet 12 from upstream to downstream. The indoor unit 1 heat-exchanges the indoor air sucked from the suction port 11 with the refrigerant in the heat exchanger 20, and guides the air heat-exchanged by the rotation of the blower fan 30 to the blower outlet 12 by the fan casing 40. 12 is blown out indoors.

  The fan casing 40 forms a part of the air passage 13 that guides the air that has passed through the heat exchanger 20 and the blower fan 30 to the blower outlet 12, and can rotate the blower fan 30 in a shape that is longer in the left-right direction than in the vertical direction. Is housed in. Further, an electrical component box 50 for driving the blower fan 30 and the like is disposed inside the main body 10 on the right side of the air passage 13 of the fan casing 40 as shown in FIG.

  As shown in FIGS. 3 and 4, the electrical component box 50 includes a control board case 60 and a control board cover 70 on the rear side, and a terminal block case 80 and a terminal block cover 90 on the front side. The base case 80 is partitioned and integrally formed. The control board case 60 is a metal case formed in a box shape with one surface opened by sheet metal, and includes a control board 61 for driving the blower fan 30 and the like. The control board cover 70 is a metal cover formed of sheet metal, and is attached to the control board case 60 so as to close the opening of the control board case 60.

  The terminal block case 80 is a metal case formed of a sheet metal in a box shape, and surrounds a terminal block 81 for connecting a cable (not shown) led to the outside of the main body 10. An opening 82 is provided so that the terminal block 81 can be confirmed during maintenance. The terminal block case 80 is formed so that the lower end is opened so that the cable connected to the terminal block 81 passes, and the upper end includes a flat portion 83 that is longer in the left-right direction than in the vertical direction. Further, the terminal block case 80 has a screw hole 84 formed in the lower left boss.

  The terminal block cover 90 includes a first terminal block cover 91 made of metal and a second terminal block cover 92 made of resin. The first terminal block cover 91 has a front plate, a top plate, and left and right side plates formed integrally by bending a sheet metal so that a lower end is opened so that a cable connected to the terminal block 81 passes, and is visible from the opening 82. A flat portion 910 that covers the terminal block 81 and overlaps the flat portion 83 of the terminal block case 80 is provided at the upper end of the top plate. The flat portion 910 is longer in the left-right direction than the vertical direction, like the flat portion 83, and is formed by bending the upper end of the top plate of the first terminal block cover 91 into a convex section as shown in FIG. Further, the first terminal block cover 91 is formed with rectangular locking holes 911 at the lower ends of the left and right side plates.

  On the other hand, the second terminal block cover 92 is integrally formed of resin with a front plate, a top plate, a bottom plate, and left and right side plates, covers the first terminal block cover 91, and the upper end of the first terminal block cover 91 at the upper end of the top plate. A contact portion 920 that contacts the flat surface portion 910 is provided. The contact portion 920 is longer in the left-right direction than the up-down direction, like the flat portion 910, and is formed to protrude toward the flat portion 910 as shown in FIG. The second terminal block cover 92 has locking claws 921 that are fitted into the locking holes 911 of the first terminal block cover 91 and lock the first terminal block cover 91 at the lower inner sides of the left and right side plates. Yes. Further, the second terminal block cover 92 has a screw insertion hole 922 that overlaps with the screw hole 84 of the terminal block case 80 at the lower left portion of the front plate.

  Next, a method for attaching the terminal block cover 90 to the terminal block case 80 will be described. As shown in FIGS. 3 to 5, the flat portion 910 of the first terminal block cover 91 is aligned with the contact portion 920 of the second terminal block cover 92, and the locking claw 921 of the second terminal block cover 92 is aligned. The locking hole 911 of the first terminal block cover 91 is fitted. As a result, as shown in FIG. 4A, the terminal block cover 90 in which the first terminal block cover 91 is locked to the second terminal block cover 92 is assembled in advance. At this time, the contact portion 920 of the second terminal block cover 92 is in contact with the flat portion 910 of the first terminal block cover 91.

  Thereafter, as shown in FIGS. 4B and 5, the flat portion 910 of the first terminal block cover 91 is overlaid on the flat portion 83 of the terminal block case 80, and the second screw hole 84 of the terminal block case 80 is second. The screw insertion holes 922 of the terminal block cover 92 are overlapped. As a result, the front surface of the terminal block 81 is covered with the terminal block cover 90.

  Next, as shown in FIG. 5, screws 923 are screwed into the screw holes 84 of the terminal block case 80 and the screw insertion holes 922 of the second terminal block cover 92. As a result, the contact portion 920 of the second terminal block cover 92 is pressed against the flat portion 910 of the first terminal block cover 91, and the flat portion 910 of the first terminal block cover 91 contacts the flat portion 83 of the terminal block case 80. Pressed. Then, the terminal block cover 90 is attached to the terminal block case 80 in a state where the flat portion 910 of the first terminal block cover 91 and the flat portion 83 of the terminal block case 80 are in contact with each other.

  According to the indoor unit 1 of the air conditioner according to the embodiment described above, the terminal block case 80 includes the flat portion 83 at the upper end, and the terminal block cover 90 covers the terminal block 81 and the terminal block case 80 at the upper end. A resin-made first terminal block cover 91 having a flat surface portion 910 that overlaps the flat surface portion 83 and a contact portion 920 that covers the first terminal block cover 91 and contacts the flat surface portion 910 of the first terminal block cover 91. The second terminal block cover 92.

  As a result, when the first terminal block cover 91 is attached to the terminal block case 80 surrounding the terminal block 81, even if the first terminal block cover 91 is made of thin sheet metal, the flat portion 83 of the terminal block case 80 and the second Since it is in contact with the flat portion 910 of the one terminal block cover 91, the contact area can be increased, and the joint between the terminal block case 80 and the first terminal block cover 91 is sufficiently in contact. can do. Further, since the flat portion 910 of the first terminal block cover 91 is pressed against the flat portion 83 of the terminal block case 80 by the contact portion 920 of the second terminal block cover 92, the first terminal block cover 91 is pressed. The contact state between the flat portion 910 and the flat portion 83 of the terminal block case 80 can be improved. As a result, in the unlikely event of ignition from the terminal block 81 or the like due to tracking or a short circuit, a flame is generated from the joint between the flat portion 83 of the terminal block case 80 and the flat portion 910 of the first terminal block cover 91. Can be prevented from spreading to the main body 10 and the like. Further, since the first terminal block cover 91 close to the terminal block 81 is made of metal and the second terminal block cover 92 covering the first terminal block cover 91 is made of resin, the flame from the terminal block 81 or the like is electrically mounted. It is possible to minimize the influence on the main body 10 and the like by being stopped inside the product box 50.

  In this embodiment, since the flame mainly rises from the terminal block 81 or the like, the terminal block case 80 is provided with a flat portion 83 at the upper end, the first terminal block cover 91 is provided with a flat portion 910 at the upper end, The abutment portion 920 is provided at the upper end of the two-terminal block cover 92, but in addition to the upper ends of the terminal block case 80 and the first terminal block cover 91, flat portions are also provided on both side ends. You may make it provide a contact part also in both sides other than the upper end of. In this case, it is possible to prevent the flame from leaking to the outside of the electrical component box 50 from the joints on both sides of the terminal block case 80 and the first terminal block cover 91.

DESCRIPTION OF SYMBOLS 1 Indoor unit 10 Main body 11 Inlet 12 Outlet 13 Air passage 20 Heat exchanger 30 Blower fan 40 Fan casing 50 Electrical component box 60 Control board case 61 Control board 62 Opening 70 Control board cover 80 Terminal block case 81 Terminal block 82 Opening 83 Flat portion 84 Screw hole 90 Terminal block cover 91 First terminal block cover 910 Flat portion 911 Locking hole 92 Second terminal block cover 920 Abutting portion 921 Locking claw 922 Screw insertion hole 923 Screw

Claims (1)

The body includes a heat exchanger, a blower fan, and an electrical component box, and the electrical component box includes a metal terminal block case surrounding a terminal block for connecting a cable led out of the main body, and the terminal block. In the air conditioner having a terminal block cover that covers the front surface and is attached to the terminal block case,
The terminal block case has a flat portion at the upper end,
The terminal block cover includes a metal first terminal block cover that covers the terminal block and includes a flat portion at an upper end that overlaps the flat portion of the terminal block case; and the first terminal block cover covers the first terminal block cover. The air conditioner which consists of a resin-made 2nd terminal block cover provided with the contact part contact | abutted to this plane part.

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