JP2007248011A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of improving work efficiency of wiring work by miniaturizing an indoor unit. <P>SOLUTION: In the air conditioner, the indoor unit 1 is electrically connected to an outdoor unit by external wiring 7. It is provided with an electrical equipment box 5 detachably attached to the indoor unit 1 and having a first mounting face 5a for mounting a power supply cord 6; a power supply cord terminal plate 14 attached to the electrical equipment box 5 and connecting the power supply cord 6; an external wiring terminal plate 16 arranged above the power supply cord terminal plate 14, attached to the electrical equipment box 5 and connecting the external wiring 7; a power supply cord holding member 2 having a first pressing part 2a holding the power supply cord 6 and a second mounting face 2f for mounting the external wiring 7; and an external wiring holding member 4 having a second pressing part 4a holding the external wiring 7. The power supply cord 6 is held and clamped between the first mounting face 5a and the first pressing part 2a, and the external wiring 7 is held and clamped between the second mounting face 2f and the second pressing part 4a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner that electrically connects an indoor unit and an outdoor unit by wiring.

  A conventional air conditioner is disclosed in Patent Document 1. This air conditioner includes an electrical box inside the indoor unit, and wiring electrically connected to the outdoor unit is connected to the electrical box. Thereby, the outdoor unit is controlled from the indoor unit side. The electrical box is detachably attached to the indoor unit, and the air conditioner can be easily installed by removing the electrical box and connecting the wiring.

  FIG. 6 is an exploded perspective view showing an electrical box of a conventional air conditioner. The electrical box 5 has a circuit board 15, and a power cord terminal plate 14 and an external wiring terminal plate 16 are arranged side by side in the horizontal direction. The power cord terminal board 14 and the external wiring terminal board 16 are provided with external terminals 14a and 16a and internal terminals 14b and 16b.

  A power cord (not shown) is connected to the external terminal 14a of the power cord terminal plate 14, and power is supplied from a commercial power source via the power cord. External wiring (not shown) connected to the outdoor unit is connected to the external terminal 16a of the terminal board 16 for external wiring. Internal wiring (not shown) connected to each electrical component of the indoor unit is connected to the internal terminals 14b and 16b. When the air conditioner is not an inverter model, the power cord terminal plate 14 is usually composed of three terminals including a ground terminal, and the external wiring is 3 as a terminal for a ground wire, a compressor, an outdoor fan motor, and a four-way valve. It consists of 5 or more terminals.

  The power cord and the external wiring are placed on the placement surface 5n of the electrical box 5 and drawn out from the outlet 5d. Bosses 5b and 5c having screw holes protrude from the mounting surface 5n. An engaging portion 5e formed of a hole is formed on the mounting surface 5n between the bosses 5b and 5c. A locking portion 5f that opens downward is formed on the wall surface that rises from the mounting surface 5n so as to face the boss 5c.

  The power cord presser 2 is formed to be bent in an L shape, and has an insertion hole 2c at one end and a claw portion 2b protruding from the other end. The external wiring retainer 4 is formed in a cover shape covering the external wiring, and a pressing portion 4e having a step is provided at the rear portion (front side in the figure). An insertion hole 4c is formed at one end of the pressing portion 4e, and a claw portion 4b is projected from the other end.

  The power cord extends from the power cord terminal plate 14 and is placed between the boss 5b and the locking portion 5e. The power cord presser 2 is attached to the electrical equipment box 5 by engaging the claw portion 2b with the locking portion 5e and screwing a screw (not shown) inserted through the insertion hole 2c into the boss 5b. As a result, the power cord can be clamped with the mounting surface 5n and the power cord presser 2 interposed therebetween, and the power cord can be prevented from falling off.

  The external wiring extends from the external wiring terminal plate 16 and is placed between the boss 5c and the locking portion 5f. The external wiring retainer 4 is attached to the electrical box 5 by engaging the claw portion 4b with the locking portion 5f and screwing a screw (not shown) inserted through the insertion hole 4c into the boss 5c. As a result, the external wiring can be clamped between the mounting surface 5n and the pressing portion 4e of the external wiring retainer 4 to prevent the external wiring from falling off.

Japanese Utility Model Publication No. 5-36781 (FIG. 1)

  However, according to the conventional air conditioner, the power supply terminal plate 14 and the external wiring terminal plate 16 are arranged in the horizontal direction, so that the electrical box 5 becomes large. As a result, there is a problem that the indoor unit becomes large. Or when the size of the indoor unit is the same, the heat exchanger accommodated in the interior has to be made small, and there has been a problem that the capacity of cooling and heating has to be reduced.

  An object of the present invention is to provide an air conditioner that can improve performance without downsizing an indoor unit or changing the size of the indoor unit.

  In order to achieve the above object, the present invention provides an air conditioner having a power cord extending from an indoor unit and electrically connecting the indoor unit and the outdoor unit with an external wiring, and one of the power cord and the external wiring. The first wiring and the other as the second wiring, and is detachably attached to the indoor unit and has a first placement surface on which the first wiring is placed, and the first electrical equipment box attached to the electrical equipment box and the first wiring A first wiring terminal board for connecting wiring; a second wiring terminal board arranged above the first wiring terminal board and attached to the electrical box; and connecting the second wiring; and holding the first wiring. A first wiring presser having a first pressing part and a second mounting surface for mounting the second wiring; and a second wiring presser having a second pressing part for pressing the second wiring. On the mounting surface and the first pressing part Ri together to clamp across the first wiring, is characterized in that the clamp across the second placement surface of the second wiring by the second pressing part.

  According to this configuration, power is supplied from the power cord to drive the indoor unit, and the outdoor unit is driven via the external wiring. When installing the indoor unit, a power cord and external wiring are connected to the electrical box. One first wiring of the power cord and the external wiring is connected to the first wiring terminal board, and the other second wiring is connected to the second wiring terminal board. The first wiring connected to the first wiring terminal board is clamped by being sandwiched between the first pressing portion of the first wiring retainer and the first placement surface of the electrical box. This prevents the first wiring from falling off. The second wiring connected to the second wiring terminal plate is clamped by being sandwiched between the second pressing portion of the second wiring retainer and the second placement surface of the first wiring terminal plate. This prevents the second wiring from falling off.

  According to the present invention, in the air conditioner configured as described above, the first wiring is composed of the power cord, and the second wiring is composed of the external wiring. According to this configuration, the power cord is connected to the lower first wiring terminal board, and the external wiring is connected to the upper second wiring terminal board.

  In the air conditioner having the above-described configuration, the present invention is characterized in that a plurality of minute protrusions are provided on the first and second mounting surfaces. According to this configuration, linear or dot-like microprojections are formed on the first and second mountings, and the frictional force between the clamped first and second wirings and the first and second mounting surfaces increases. .

  In the air conditioner having the above-described configuration, the present invention is characterized in that a plurality of minute protrusions are provided on the first and second pressing portions. According to this configuration, linear or dot-like microprojections are formed on the first and second mountings, and the frictional force between the first and second wirings to be clamped and the first and second pressing portions increases.

  In the air conditioner configured as described above, the present invention is characterized in that the second mounting surface functions as an insulating plate between the first wiring terminal plate and the second wiring terminal plate.

  According to the present invention, since the second wiring terminal plate is disposed above the first wiring terminal plate, the width of the electrical box can be reduced, and the indoor unit can be downsized. Moreover, when the size of the indoor unit is the same, the heat exchanger accommodated in the interior can be made larger, so that the cooling and heating capabilities can be improved. Moreover, in order to form the 2nd mounting surface which mounts 2nd wiring in a 1st wiring retainer, the 2nd wiring connected to the 2nd wiring terminal board above the 1st wiring terminal board is clamped easily. can do.

  According to the present invention, since the first wiring is composed of the power cord and the second wiring is composed of the external wiring, when the number of power cords is smaller than that of the external wiring, the first wiring terminal board disposed below The width is narrower than the upper second terminal board for wiring. For this reason, the width | variety of the lower part of the electrical equipment box installed in an indoor unit can be narrowed. Therefore, the electrical components installed in the lower part of the indoor unit can be arranged adjacent to the lower part of the narrow electrical box, and the storage efficiency of the indoor unit can be improved and the size can be reduced.

  In addition, according to the present invention, since the plurality of minute protrusions are provided on the first and second mounting surfaces, it is possible to more reliably prevent the first and second wirings from falling off.

  According to the present invention, since the first and second pressing portions are provided with a plurality of minute protrusions, it is possible to more reliably prevent the first and second wirings from falling off.

  According to the present invention, since the second mounting surface functions as an insulating plate between the first wiring terminal plate and the second wiring terminal plate, it is possible to prevent a short circuit between the first and second wirings.

  Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same parts as those in the conventional example shown in FIG. FIG. 1 is a perspective view showing an indoor unit of an air conditioner according to an embodiment. The indoor unit 1 is supplied with power from a commercial power supply via a power cord 6 (first wiring). The indoor unit 1 is connected to an outdoor unit (not shown) by an external wiring 7 (second wiring), and the outdoor unit is controlled from the indoor unit 1 side.

  The indoor unit 1 has a front panel 11 attached to the front surface of a cabinet 10 attached to a wall surface in the room. A suction port 11a is formed in the upper part of the front panel 11, and a blower outlet 11b is formed in the lower part. An opening 1 a that can be opened and closed by a lid (not shown) is formed on the side surface of the indoor unit 1.

  FIG. 2 is a perspective view of the indoor unit 1 with the front panel 11 removed. The cabinet 10 is provided with a heat exchanger 12 disposed to face the suction port 11a (see FIG. 1). The air taken into the indoor unit 1 from the suction port 11a exchanges heat with the heat exchanger 12 and is blown out from the air outlet 11 (see FIG. 1). Thereby, indoor air conditioning is performed.

  An electrical box 5 for connecting the power cord 6 and the external wiring 7 is disposed on the opening 1 a side of the cabinet 10. The power cord 6 and the external wiring 7 are separately drawn into the electrical box 5 because the connection destination from the indoor unit 1 is different. In addition, each electrical component of the indoor unit 1 is disposed inside or adjacent to the electrical box 5 and connected via an internal wiring (not shown). Each electrical component of the indoor unit 1 is disposed on the side of the indoor unit 1 to improve stability. The electrical box 5 is detachably attached to the cabinet 10. Thereby, when installing the indoor unit 1, the power cord 6 and the external wiring 7 can be easily connected.

  3 and 4 are a perspective view and an exploded perspective view of the electrical box 5. FIG. 5 shows a sectional view of the electrical box 5. The electrical box 5 holds a circuit board 15 erected at the end, and has a first placement surface 5 a perpendicular to the circuit board 15. As will be described later, the power cord 6 is placed on the first placement surface 5a. A boss 5k having a screw hole projects from the rear portion of the first placement surface 5a. A vertical surface 5m is formed on the side of the first mounting surface 5a away from the circuit board 15, and a horizontal surface 5h continuous with the vertical surface 5m is formed at the same height as the boss 5k.

  An insertion hole 14c is formed in the power cord terminal plate 14 (first wiring terminal plate) to which the power cord 6 is connected. The screw 19 inserted through the insertion hole 14c is screwed into the screw hole 5j formed in the first placement surface 5a, and the power cord terminal plate 14 is attached to the first placement surface 5a. An insertion hole 16c is formed in the external wiring terminal board 16 (second wiring terminal board) to which the external wiring 7 is connected. The external wiring terminal board 16 is mounted on the boss 5k and the horizontal surface 5h by screwing the screw 20 inserted through the insertion hole 16c into the boss 5k. As a result, the external wiring terminal plate 16 is disposed above the power cord terminal plate 14.

  The power cord terminal board 14 and the external wiring terminal board 16 are provided with external terminals 14a and 16a and internal terminals 14b and 16b arranged horizontally. The power cord 6 is connected to the external terminal 14 a of the power cord terminal plate 14, and the external wiring 7 is connected to the external terminal 16 a of the external wiring terminal plate 16. Internal wiring (not shown) connected to each electrical component of the indoor unit 1 is connected to the internal terminals 14b and 16b.

  A boss 5b having a screw hole protrudes from the first placement surface 5a. On the first mounting surface 5a on the side of the boss 5b, a plurality of linear minute projections 5g are arranged in parallel. A plurality of minute protrusions 5g may be formed in a dot shape.

  A locking portion 5e having a space below is formed on the side opposite to the boss 5b with respect to the minute protrusion 5g by bridging between the ribs. On the side of the locking portion 5e, a locking portion 5f is formed in which the lower part of the side wall surface of the electrical equipment box 5 is opened.

  The power cord retainer 2 (first wiring retainer) is formed in a cover shape covering the power cord 6 and has a second placement surface 2f on which the external wiring 7 is placed. A boss 2d having a screw hole projects from the second placement surface 2f. A first pressing portion 2a having a step is provided at the rear portion (front side in FIG. 4) of the second placement surface 2f. An insertion hole 2c (see FIG. 5) is formed at one end of the first pressing portion 2a, and a claw portion 2b extending at substantially the same height as the second placement surface 2f is provided at the other end. A plurality of linear micro-projections 2e and 2g (see FIG. 5) are arranged in parallel on the side of the boss 2d and the lower surface of the first pressing portion 2a. A plurality of minute protrusions 2e and 2g may be formed in a dot shape.

  The external wiring retainer 4 is formed in a cover shape that covers the external wiring 7, and a second pressing portion 4 a having a step is provided at the rear portion (front side in the figure). An insertion hole 4c is formed at one end of the second pressing portion 4a, and a claw portion 4b is projected from the other end. A plurality of linear minute protrusions 4d (see FIG. 5) are arranged in parallel on the lower surface of the second pressing portion 4a. A plurality of the fine protrusions may be formed in a dot shape.

  The power cord 6 connected to the power cord terminal plate 14 is placed on the side of the boss 5b on the first placement surface 5a and pulled out from the outlet 5d. The claw portion 2b is locked to the locking portion 5e, and the power cord presser 2 is attached to the electrical box 5 by screwing a screw 17 inserted through the insertion hole 2c into the boss 5b. Accordingly, the power cord 6 can be clamped by the first placement surface 5a and the pressing portion 2a of the power cord presser 2 so that the power cord 6 can be prevented from falling off.

  Further, the frictional force between the first placement surface 5a or the first pressing portion 2a and the power cord 6 is increased by the minute projections 5g and 2g provided on the first placement surface 5a and the first pressing portion 2a. As a result, the power cord 6 can be more reliably prevented from falling off.

  The external wiring 7 connected to the external wiring terminal plate 16 is placed on the side of the boss 2d of the power cord presser 2 and pulled out from the outlet 5d. The external wiring retainer 4 is attached to the electrical box 5 by engaging the claw portion 4b with the engaging portion 5f and screwing the screw 18 inserted through the insertion hole 4c into the boss 2d. As a result, the external wiring 7 can be clamped between the second mounting surface 2f and the second pressing portion 4a of the external wiring retainer 4 and the external wiring 7 can be prevented from falling off.

  Further, the frictional force between the second mounting surface 2f or the second pressing portion 4a and the external wiring 7 is increased by the minute projections 2e and 4d provided on the second mounting surface 2f and the second pressing portion 4a. Thereby, it is possible to more reliably prevent the external wiring 7 from dropping off. Further, since the second placement surface 2f is interposed between the terminal portion of the power cord terminal plate 14 and the terminal portion of the external wiring terminal plate 16, it also serves to electrically insulate both.

  According to the present embodiment, since the external wiring terminal plate 16 is disposed above the power cord terminal plate 14, the width of the electrical box 5 can be reduced, and the indoor unit 1 can be downsized. Moreover, when the size of the indoor unit is the same, the heat exchanger accommodated in the interior can be made larger, so that the cooling and heating capabilities can be improved. Further, since the second mounting portion 2f for mounting the external wiring 7 is formed on the power cord holder 2, the external wiring 7 connected to the external wiring terminal plate 16 above the power cord terminal plate 14 can be easily provided. Can be clamped.

  In the present embodiment, the power cord terminal plate 14 is disposed above the external wiring terminal plate 16, the external wiring 7 is pressed by the same member as the power cord presser 2, and the power cord is pressed by the same member as the external wiring presser 4. 6 may be pressed. However, it is more desirable to arrange the external wiring terminal plate 16 above the power cord terminal plate 14 as in this embodiment.

  That is, when the number of external wires 7 is greater than the number of power cords 6, the width of the power cord terminal plate 14 is narrower than that of the external wire wiring terminal plate 16. For this reason, the width | variety of the lower part of the electrical equipment box 5 installed in the indoor unit 1 can be narrowed. Therefore, the electrical components installed at the lower part of the indoor unit 1 can be arranged adjacent to the lower part of the narrow electrical box 5, and the storage efficiency of the indoor unit 1 can be improved and the size can be reduced.

  In the present embodiment, the power cord terminal plate 14 and the external wiring terminal plate 16 may be installed so that the external terminals 14a and 16a and the internal terminals 14b and 16b are arranged vertically. Needless to say, the minute protrusions 5g, 2g, 2e, and 4d are not limited to the present embodiment, and may be formed of other shapes or different parts as long as the frictional force can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the air conditioner which electrically connects an indoor unit and an outdoor unit by wiring.

The perspective view which shows the indoor unit of the air conditioner of embodiment of this invention The perspective view which shows the state which removed the front cover of the indoor unit of the air conditioner of embodiment of this invention The perspective view which shows the electrical equipment box of the air conditioner of embodiment of this invention The disassembled perspective view which shows the electrical equipment box of the air conditioner of embodiment of this invention Sectional drawing which shows the electrical equipment box of the air conditioner of embodiment of this invention An exploded perspective view showing an electrical box of a conventional air conditioner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Power supply cord holder 2a 1st press part 2b, 4b nail | claw part 2f 2nd mounting surface 2e, 2g, 4d, 5g Minute protrusion 4 External wiring holder 4a 2nd pressing part 5 Electrical box 5a 1st mounting surface 5e, 5f Locking part 6 Power cord (first wiring)
7 External wiring (second wiring)
10 cabinet 11 front panel 14 power cord terminal board (first wiring terminal board)
15 Circuit board 16 External wiring terminal board (second wiring terminal board)

Claims (5)

  In an air conditioner having a power cord extending from an indoor unit and electrically connecting the indoor unit and the outdoor unit by external wiring, one of the power cord and the external wiring is a first wiring, and the other is a second wiring An electrical box that is detachably attached to the indoor unit and has a first placement surface on which the first wiring is placed, and a first wiring terminal plate that is attached to the electrical equipment box and connects the first wiring. A second wiring terminal plate disposed above the first wiring terminal plate and attached to the electrical box and connecting the second wiring; a first pressing portion for holding the first wiring; and a second wiring. A first wiring retainer having a second placement surface and a second wiring retainer having a second pressing portion for pressing the second wiring, and the first wiring by the first placement surface and the first pressing portion. When clamping with Moni, air conditioner characterized by being clamped across the second placement surface of the second wiring by the second pressing part.   An air conditioner characterized in that a first wiring is composed of the power cord and a second wiring is composed of the external wiring.   The air conditioner according to claim 1 or 2, wherein a plurality of minute protrusions are provided on the first and second mounting surfaces.   The air conditioner according to any one of claims 1 to 3, wherein a plurality of minute protrusions are provided on the first and second pressing portions.   The air conditioner according to any one of claims 1 to 4, wherein the second mounting surface functions as an insulating plate between the first wiring terminal plate and the second wiring terminal plate.

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