JP2002267210A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which prevents noise from being generated. SOLUTION: Holes 10 are provided to a baffle plate (casing) 5 of an outdoor unit, while holes 9a are provided to a reactor 9. Vibration proof nuts 12 are inserted into the holes 10 of the baffle plate 5, respectively, and bolts 19 are screwed to the nuts 12, respectively, in a state of penetrating the holes 9a of the reactor 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner having a reactor, and more particularly to a structure for preventing noise.

[0002]

2. Description of the Related Art A power supply device for rectifying an AC power supply into a DC power supply is provided in an air conditioner. Generally, a power supply device is provided with a reactor as a choke coil in order to effectively extract power from an AC power supply. For example, in the case of a PWM (Pulse Width Modulation) machine, if rectification is performed only by a rectifying diode and a capacitor, current flows through the diode only during a period when the power supply voltage is higher than the voltage across the capacitor. In many cases, the peak value of this current becomes very large even if the average value is small. Therefore, by providing a reactor, the conduction angle at which the current flows can be widened by suppressing the peak value of the current, and the power factor can be improved (choke-input rectification method). In addition, a simple PAM (Pulse Ampli
tude Modulation) machine, the reactor
In addition to being used as an input type rectifier, it is used as a choke coil of a step-up chopper type. The step-up chopper method is a method in which energy is stored by flowing a short-circuit current to a reactor, and a capacitor is charged with a back electromotive force generated in the reactor at the moment when the short-circuit current is turned off, thereby improving a power factor.

[0003]

However, when the reactor current is abruptly changed, a sudden force is applied to the windings and core of the reactor by electromagnetic induction energy to vibrate, causing free vibration at the natural frequency of the reactor. Problem. Therefore, in a conventional PAM machine, for example, noise is reduced by adjusting a short-circuit timing of a reactor (see Japanese Patent Application Laid-Open No. H10-178780). More specifically, in FIG. 5, 101 is an AC power supply, 102 is a reactor having one end connected to one output terminal of the AC power supply, 103 is a first diode bridge connected to the other end of the reactor 102, Reference numeral 104 denotes a second diode bridge similarly connected to the other end of the reactor 102, and reference numeral 105 denotes a short-circuit element such as a transistor. The short-circuit element 105 is driven by the short-circuit element driving means 106 and passes through the first diode bridge 103 and the reactor 102. The AC power supply 101 is short-circuited. In the PAM machine thus configured, when the short-circuit element is driven to generate the power factor improving pulse 108a as shown in FIG.
The power supply current waveform before the power factor improvement indicated by 0 is indicated by the reference numeral 111, and the conduction period is extended to improve the power factor. Reference numeral 112 denotes an AC power supply voltage of the AC power supply 101. Then, by outputting the noise reduction pulse 108b following the power factor improvement pulse 108a, noise generated by the reactor 102 when the power factor improvement pulse 108a is turned off can be reduced. However, even such a PAM machine has a problem that noise cannot be completely prevented.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide an air conditioner that can prevent generation of noise.

[0005]

According to a first aspect of the present invention, there is provided an air conditioner including an outdoor unit and a reactor provided in the outdoor unit, wherein a hole is provided in a casing of the outdoor unit. A hole is provided in the reactor, and a cylindrical elastic body is inserted into one of the hole of the casing and the hole of the reactor. It is characterized in that the bolt is inserted in a state where the bolt is inserted.

In the present invention, the generation of noise due to the vibration of the reactor is suppressed by interposing the vibration-proof nut. Further, in a PWM machine which does not require vibration isolation, it is sufficient that no elastic body is provided. Therefore, the same casing as the PAM unit can be used for the casing of the outdoor unit.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes an outdoor unit of an air conditioner. The outdoor unit 1 is configured by combining a plurality of casings. In FIG.
An exploded view of this casing is shown. The illustration of the heat exchanger and the like is omitted. Outdoor unit 1 is front panel 2
And the rear panel 3 and the like. The outdoor unit 1 is provided with a power supply (not shown) for supplying electric power to the compressor. The power supply is provided so as to be housed between the side panel 4 and the baffle plate (casing) 5. Has become. A part of the baffle plate 5 is shown in FIG. In the figure, reference numeral 9 denotes a reactor constituting a part of the power supply device, and holes 9a are provided at four corners. Similarly, the baffle plate 5 is provided with four holes 10 corresponding to the holes 9 a of the reactor 9. The reactor 9 is attached to the baffle plate 5 via an anti-vibration nut 12. As shown in FIG.
The anti-vibration nut 12 is a cylindrical rubber member (elastic body) 15, and the metal sleeve 1 fitted to one end side inside the rubber member 15.
6, a nut 17 fitted to the other end of the rubber member 15. One end of the rubber member 15 is a flange portion 15a, and the other end of the rubber member 15 is inserted into the hole 10 of the baffle plate 5 and a member for fixing the flange portion 15a to a member (here, Then, it is sandwiched between the baffle plate 5 and the reactor 9). Then, the bolt 19 is screwed into the vibration isolating nut 12 and screwed with the nut 17 in a state where the bolt 19 is passed through the hole 9 a of the reactor. As a result, the sleeve 16 and the nut 17 approach each other, the flange portion 15a is sandwiched between the baffle plate 5 and the reactor 9, and the metal member (the bolt 19, the sleeve 16
And the nut 17) are fixed so as not to contact with each other.

In the outdoor unit of the air conditioner configured as described above, even if the reactor 9 vibrates during operation, the rubber member 15 of the anti-vibration nut 12 absorbs the vibration, thereby suppressing the generation of noise. it can. In the outdoor unit 1 of the present embodiment, in the case of a PWM machine, the reactor 9 may be directly attached to the baffle plate 5 with bolts or the like without using the vibration isolating nut 12, and the parts (baffle plate 5) can be shared. Can be planned.

As the vibration isolating nut 12, a known vibration isolating nut can be used. As a material of the rubber member 15, a commonly used material such as chloroprene rubber can be adopted. The elastic body is not limited to the rubber member 15, but may be any material. In this example, the vibration isolating nut 12 is inserted into the hole 10 of the baffle plate 5. However, the vibration isolating nut 12 is inserted into the hole 9 a of the reactor 9, and the bolt 19 is inserted into the hole 1 of the baffle plate 5.
It may be screwed to the anti-vibration nut 12 in a state where it penetrates to zero. The place where the reactor 9 is attached may be any place as long as it is a casing of an air conditioner.

[0010]

As described above, in the air conditioner of the present invention, even if the reactor vibrates during operation, the generation of noise can be suppressed by the elastic body absorbing the vibration. Further, in the air conditioner of the present invention, when vibration isolation is not required, the reactor may be attached to the casing without using an elastic body. With a type of air conditioner,
Parts can be shared.

[Brief description of the drawings]

FIG. 1 is a perspective view of an outdoor unit of an air conditioner.

FIG. 2 is an exploded perspective view of a casing of the air conditioner.

FIG. 3 is a perspective view showing a mounting structure of a reactor and a baffle plate in the air conditioner shown as one embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an anti-vibration rubber used in the air conditioner.

FIG. 5 is a diagram showing a configuration of a conventional PAM machine.

FIG. 6 is a diagram showing a state of improvement of a power factor by the PAM machine.

[Explanation of symbols]

 Reference Signs List 5 baffle plate (casing) 9 reactor 9a hole 10 hole 15 rubber member (elastic body) 19 bolt

Claims (1)

[Claims] An outdoor unit and a reactor provided in the outdoor unit, wherein a hole is provided in a casing of the outdoor unit and a hole is provided in the reactor, and a hole in the casing and a reactor are provided. A cylindrical elastic body is inserted into one of the holes, and a bolt is inserted into the elastic body so as to pass through one of the hole of the casing and the other of the hole of the reactor. Harmony equipment.