JP2011231964A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner not causing any useless space and an increase in cost, and having a countermeasure made against noise.SOLUTION: The air conditioner, wherein a compressor 23 is mounted inside a casing, includes: a partition board 24 partitioning the space inside the casing; an electrical component box 25 attached to the partition board 24; a terminal block 30 attached to the vicinity of the electrical component box 25; an electric wire P for drive extending from the electrical component box 25 to reach the compressor 23; and a noise filter 31 attached in the middle of the electric wire P for drive. The partition board 24 is formed of a magnetic metal, and out of the electric wire P for drive, at least a part of the wire length from the position of the noise filter 31 to the compressor 23 is brought into contact with the partition board 24 in installation, so that electromagnetic wave noise occurring from the electric wire P for drive is released to the partition board 24.

Description

  The present invention relates to wiring in an air conditioner (typically an outdoor unit).

  In an air conditioner, electromagnetic noise due to on / off and inverter drive is likely to occur, particularly with respect to a compressor through which a large current flows. For example, as countermeasures against noise inside the outdoor unit, the internal arrangement of the machine room that houses the electrical components and the compressor is devised, or a partition plate that partitions the internal space of the machine room is provided to shield against electromagnetic noise. An air conditioner has also been proposed (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2008-20133 (FIG. 5)

  However, the conventional air conditioner as described above requires a partition plate inside the machine room, in addition to the partition plate with the heat exchange chamber with the fan, which results in waste of space and an increase in cost. There is a problem.

  In view of such conventional problems, an object of the present invention is to provide an air conditioner with noise countermeasures that does not waste space and increase costs.

The present invention is an air conditioner in which a compressor is mounted in a casing, and a partition plate that partitions a space in the casing, an electrical component box that is attached to the partition plate and includes a control / drive circuit, A terminal block for connecting a wire coming from the outside as viewed from the electrical component box to an electrical wire attached in the vicinity of the electrical component box and connected to a circuit in the electrical component box, and coming out of the electrical component box A drive wire that leads to the compressor, and a noise filter mounted in the middle of the drive wire,
The partition plate is made of a magnetic metal, and at least a part of the wiring length from the position where the noise filter is located to the compressor among the driving wires is attached in contact with the partition plate. Therefore, electromagnetic wave noise generated from the driving electric wire is released to the partition plate.

  In the air conditioner configured as described above, the part of the driving electric wire is attached in contact with the magnetic metal partition plate, so that the electromagnetic wave noise generated from the driving electric wire is applied to the partition plate. It was possible to escape by concentrating, and the influence of electromagnetic noise on the periphery was reduced. Therefore, a noise filter is no longer required for the wires going from the terminal block to the circuit in the electrical component box.

In the above air conditioner, the first half of the wiring length from the position where the noise filter is located to the compressor is in contact with the partition plate, and the second half is separated from the partition plate and reaches the compressor. It may be a configuration.
Since the compressor is installed away from the partition plate, it is difficult to keep all of the wiring length along the partition plate, but by placing the first half in contact with the partition plate, electromagnetic noise to the surroundings The impact of was reliably reduced.

  According to the air conditioner of the present invention, noise countermeasures that do not waste space and increase costs can be easily taken.

It is a perspective view which shows an example of the external appearance in the outdoor unit of the air conditioner which concerns on one Embodiment of this invention. It is a top view which shows a part of internal structure of an outdoor unit in the state which removed the ceiling part in FIG. It is a perspective view which shows a part of internal structure of an outdoor unit in the state which removed casings other than the bottom part in FIG. It is a circuit diagram close | similar to the substance wiring (however, single line) of only the principal part inside an outdoor unit. It is the figure which expanded a part of FIG. 3, and showed a part of actual wiring.

《Outdoor configuration of outdoor unit》
FIG. 1 is a perspective view showing an example of an appearance of an outdoor unit 1 of an air conditioner according to an embodiment of the present invention. In the figure, the outdoor unit 1 includes a rectangular parallelepiped casing 10 having a front surface portion 11, a rear surface portion 12, left and right side surface portions 13 and 14, a ceiling portion 15, and a bottom portion 16. The front surface portion 11 is configured by a left fixed cover 11a and a right maintenance cover 11b that can be easily attached and detached. The left fixed cover 11a is formed with an air outlet 11c, and the air outlet 11c is covered with an air outlet grill 11d. The rear surface portion 12 and the left side surface portion 13 have a lattice shape in which a large number of openings capable of sucking outside air into the casing 10 are formed. A fixing leg 17 is provided on the lower surface of the bottom 16 for fixing to the installation location.

By removing the maintenance cover 11b, an opening (service opening) is formed on the front right side of the casing 10 so that the inside can be inspected. Note that the right end side of the maintenance cover 11b slightly turns to the side and forms the right side surface together with the side surface portion 14.
The casing 10 is made of a steel plate, and is electrically connected by being connected to each other by screwing or the like. Further, a ground terminal (not shown) is provided at a predetermined lower portion, and the entire casing 10 is grounded by performing grounding work.

<Internal structure of outdoor unit>
FIG. 2 is a plan view showing a part of the internal structure of the outdoor unit 1 with the ceiling 15 in FIG. 1 removed. In FIG. 2, the internal space of the casing 10 is partitioned into a machine room S1 and a heat exchange room S2 by a steel plate, that is, a partition plate 24 made of a magnetic metal. The partition plate 24 is provided so as to connect the fixed cover 11 a of the front surface portion 11 and the rear surface portion 12, and is electrically grounded similarly to the casing 10. The partition plate 24 is not painted.

The partition plate 24 is formed in a curved shape in which the machine room S1 side is concave when viewed from above. Moreover, the partition plate 24 is attached so that the rear portion is inclined toward the machine room S1 side (the right side in FIG. 2).
A compressor 23, an electrical component box 25, and the like are disposed in the machine room S1. The electrical component box 25 includes a circuit for controlling and driving the compressor 23 and the fan 22, and is an electrical component unitized in a box shape. On the other hand, an outdoor heat exchanger 21 and a fan 22 are arranged in the heat exchange chamber S2.

<Configuration of electrical component box>
FIG. 3 is a perspective view showing a part of the internal structure of the outdoor unit 1 with the casing 10 other than the bottom 16 in FIG. 1 removed. In FIG. 3, the electrical component box 25 is attached to the upper part of the partition plate 24 on the machine room S1 side. The electrical component box 25 includes a substrate portion 26 and a protective cover 27 that covers and protects the substrate portion 26. In FIG. 3, the inner substrate 26 is slightly visible from the upper left and lower left cutout portions 27 a of the protective cover 27, but the substrate portion 26 extends into the protective cover 27. The board unit 26 is provided with electrical components such as a microcomputer for controlling the operation of various devices such as the compressor 23 and the fan 22, and an inverter circuit for driving the compressor 23.

  Although the reactor 28 is provided in the electric circuit which supplies power to the inverter circuit, it is relatively large and is a heat generating component, so that it is attached to the outer surface of the protective cover 27, for example. Further, an attachment member 29 formed by being bent in an L shape (or Z shape) as viewed from above is attached to the outer surface of the protective cover 27, and the terminal block 30 is attached to the attachment member 29. . Thereby, the terminal block 30 faces the front side, and the cable connection work performed by removing the maintenance cover 11b (FIGS. 1 and 2) is easy.

<Substrate wiring>
FIG. 4 is a circuit diagram close to substantial wiring (however, a single wire) of only the main part inside the outdoor unit 1. In the figure, the terminal block 30 is attached in the vicinity of the electrical component box 25 as described above. The terminal block 30 is connected to a circuit in the electrical component box 25 by a power supply wire Lp (for example, three wires) and a control wire Lc (for example, three wires). The terminal block 30 is connected to the power supply wire Lp and the control wire Lc with two cables from the indoor unit 40.

  On the other hand, the electrical component box 25 and the fan 22 are connected by an electric wire (cable) F. In addition, the electrical component box 25 and the compressor 23 are connected by driving wires P (three). A noise filter 31 is attached (extrapolated) in the middle of the drive wire P coming out from the upper right of the electrical component box 25 and reaching the compressor 23. The noise filter 31 is, for example, a split type ferrite core or ring core. Here, in the present embodiment, at least a part of the wiring length from the position where the noise filter 31 is located to the compressor 23 (portion A in FIG. 4) of the driving wire P is connected to the driving wire P. Take measures to absorb the generated electromagnetic noise and let it escape using grounding.

  FIG. 5 is an enlarged view of a part of FIG. 3 and a part of the actual wiring. In the figure, the driving electric wire P (3-wire) exits from the upper right side of the electrical component box 25, is drawn downward along the right side surface of the electrical component box 25, and passes through the noise filter 31. The drive wire P after passing through the noise filter 31 is connected to the compressor 23 via a thin flat connector 32 on the way. Here, the first half portion of the drive wire P after passing through the noise filter 31 is attached so as to be in contact with the partition plate 24. For example, a small hole is made in the partition plate 24, and the driving electric wire P is bound to the partition plate 24 by a binding band 33 passed therethrough. The latter half portion of the driving electric wire P is separated from the partition plate 24 and reaches the compressor 23. The ratio between the first half and the second half is about 1: 1.

  As described above, by attaching a part of the drive wire P to the magnetic metal partition plate 24 and attaching it, the electromagnetic noise generated from the drive wire P is concentrated on the partition plate 24 and released. As a result, it was confirmed that the influence of electromagnetic noise on the periphery (particularly around the terminal block 30 that is easily affected by noise) is reduced. In addition, since the compressor 23 is installed away from the partition plate 24, it is difficult to make all of the wiring length after passing through the noise filter 31 follow the partition plate 24, but the first half touches the partition plate 24 in this way. In this way, the influence of electromagnetic noise on the periphery was reliably reduced. As a result, noise filters are no longer required for the wires Lp and Lc going from the terminal block 30 to the circuit in the electrical component box 25, which was necessary in the prior art.

  In this way, it is possible to provide an air conditioner that takes noise countermeasures without increasing the number of members (rather than reducing the number of noise filters), without significantly changing the structure, and without wasting space and increasing costs. Further, instead of the idea of shielding the noise, it is possible to provide a simple and reliable noise countermeasure by absorbing the noise through the partition plate 24 and letting it escape.

<Others>
In addition, although the separate type outdoor unit has been described in the above embodiment, a target to which the wiring as described above can be applied is not necessarily limited to the outdoor unit. For example, even if it is an internal / external integrated air conditioner, a dehumidifier, etc., if it is a structure with the same partition plate and compressor, it is possible to give the same wiring.

DESCRIPTION OF SYMBOLS 10 Casing 23 Compressor 24 Partition plate 25 Electrical component box 31 Noise filter P Electric wire for driving

Claims (2)

An air conditioner having a compressor (23) mounted in a casing (10),
A partition plate (24) for partitioning the space in the casing (10);
An electrical component box (25) attached to the partition plate (24) and including a control / drive circuit;
A terminal for connecting an electric wire coming from the outside as viewed from the electric component box (25) to an electric wire attached in the vicinity of the electric component box (25) and connected to a circuit in the electric component box (25). Stand (30),
A drive wire (P) that exits from the electrical component box (25) and reaches the compressor (23);
A noise filter (31) mounted in the middle of the drive wire (P),
The partition plate (24) is made of a magnetic metal and has at least a wiring length from the position where the noise filter (31) is located to the compressor (23) in the drive wire (P). An air conditioner characterized in that a part of the air conditioner is attached to the partition plate (24) so as to release electromagnetic noise generated from the drive wire to the partition plate.   Of the wiring length from the position where the noise filter (31) is located to the compressor (23), the first half is arranged so as to touch the partition plate (24), and the second half is from the partition plate (24). The air conditioner according to claim 1, wherein the air conditioner is separated to reach the compressor.

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