JPH0195240A - Outdoor device of air conditioner - Google Patents

Abstract

PURPOSE:To make a noise of an outdoor unit low by a method wherein supporting elements at a shaft constitute a supporting member for enclosing a fan motor in symmetrical with a center of the shaft, annular vibration-proof rubbers are fixed to both side surfaces near the center of shaft of the fan motor and their outer circumferences are indirectly supported to a protective guard. CONSTITUTION:An outer casing 1 has a protective guard 2 at a substantial central part of a longitudinal surface, a front supporting part 2a for a fan motor is arranged at a central front part, its central part is projected further forwardly, an annular vibration-proof rubber 4a is inserted in it and a front end of the fan motor 3 is set in coaxial with the center of the shaft. A rear supporting part 5 is projected rearwardly so as to enclose an outer circumference of the fan motor 3, its central part is projected rearwardly and an annular vibration-proof rubber 4b is inserted into a rear part of the fan motor so as to support it at the center of the shaft. A propeller fan 8 is located for rearwardly than the fan motor 3, an inner side of a central hub 8a may enclose an outside part of the rear supporting part 5 in a spaced-apart relation and rotatably arranged. Accordingly, an amount of vibration transmitted to the protective guard 2b is reduced, vibration of the outer casing 1 is also reduced and a circulating vibration of the fan motor can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outdoor unit of an air conditioner, and particularly to a protective guard for a blower suitable for supporting a fan motor.

[Conventional technology]

As described in Japanese Patent Publication No. 62-2226, a conventional outdoor unit has a structure in which a flange portion on the outer periphery of a fan motor is supported. Furthermore, the ventilation section of the protective guard that supports the fan motor has a shutter-like structure.

(Problems to be Solved by the Invention) The above-mentioned conventional technology does not take into account the fact that the vibration of the fan motor itself is prevented from being transmitted to the protective guard, and the torque pulsation of the fan motor is transmitted to the fan guard. There was a problem that the vibration noise increased due to the noise caused by the wind.In addition, since the guard of the first ventilation section was made in the form of a shutter to increase its strength, wind noise from the guard was generated. It was a hindrance.

An object of the present invention is to reduce the transmission of vibration from the fan motor to the protective guard, as well as to reduce the rotational vibration of the fan relative to the motor, thereby making it possible to select a guard shape that has little resistance to ventilation. The goal is to reduce noise.

There is a strong social demand for lower noise levels in this type of outdoor unit. Currently, however, with propeller fans, the speed can be reduced by increasing the twist of the blades, but since a certain amount of air is required from the perspective of heat exchange, how can we reduce the wind noise of the protective guard? However, with regard to fan motors, how to reduce vibration has been highlighted as an important issue.

[Means for solving problems]

The above object is achieved by attaching annular anti-vibration rubber to both sides near the axis of the fan motor, and indirectly supporting the outer periphery of the anti-vibration rubber on a protective guard.

The rotational direction vibration of the fan motor case is greatest at the outer periphery in the radial direction, and extremely small at the center of the side surface in the axial direction.

Conventionally, in the case where the fan motor was placed inside the unit box, the motor base was fixed to the bottom of the unit and the shaft was supported via the anti-vibration rubber at the tip of the motor base. I couldn't find anything that could be positioned in front to support the shaft. The reason for this was that there was no place to install a conventional motor base.
When the fan motor is supported on the shaft by the guard itself, there is no established technology to prevent rotational vibration of the fan motor, and there is also the problem that the support and the fan overlap on the shaft side, making it impossible to rotate using conventional technology. there were. In the present invention,
This is achieved by configuring the support on the shaft side to surround the fan motor symmetrically about the axis of the fan motor, and supporting the motor in a sandwich-like manner with a substantially similar support at the other end.

[Effect]

The annular anti-vibration rubbers on both sides are attached to the sides along with the motor axis, so they come in contact with the motor at a position where vibrations are extremely low, and the rubber with a small spring constant absorbs vibrations, making it easy to protect the guard. Reduce vibration transmission. In addition, by reducing the vibration of the protective guard, it is possible to use a guard shape that has multiple wire rings with wire diameters that reduce ventilation resistance and wind noise. can be reduced. In addition, since the support part of the fan motor is configured to surround the motor,
The boss of the fan allows the outer periphery of the support portion to rotate, and also allows the fan to be positioned close to the fan motor, thereby reducing vibrations caused by rotation of the fan relative to the fan motor.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an outdoor unit of an air conditioner according to the present invention will be described below with reference to FIGS. 1 and 2. 1 is an outer box with an inverted-shaped cross section, and a protective guard 2 located approximately in the center of the vertical side.
A fan motor front support part 2a with no opening is provided in the center of the protective guard 2 and is protruded forward. A rubber member 4a is inserted to support the front end of the fan motor 3 so that it is aligned with the shaft core. 2aa is a cylindrical flange portion bent in the axial direction of the support portion 2a, which is connected to the fan motor 3;
Its role is to prevent rotational vibration. Reference numeral 2b is a guard, in which a large number of wire rings 2ba with a circular cross section and a small wire diameter are arranged concentrically in the vertical direction at a pitch that makes it impossible to insert a finger, and the rings 2ba are connected to a plurality of radial vertical wires 2bb. The outer tip of the vertical wire 2bb is attached to the outer box, and the inner tip is fixed to the front support part 2a. Reference numeral 5 denotes an annular anti-vibration rubber 4b which has a rear supporting force and is protruded rearward so as to surround the outer periphery of the fan motor 3, and whose center is protruded further rearward.
is inserted to support the rear end of the fan motor 3 with its axis. The outer end of the rear support $ is held by a screw to the front support v2a.

3a and 3b are circular protrusions provided at both ends of the axis of the fan motor 3, and are inserted inside the vibration isolating rubbers 4a and 4b. 6 is a base, and 7 is a heat exchanger, which is located on the rearmost suction side of the base 6. Reference numeral 8 denotes a propeller fan, which is located behind the fan motor 3, and the inside of the central boss 8a surrounds the outside of the rear support 1 at a distance and is rotatably arranged. be. Thereby, in addition to the effect of supporting both ends of the fan motor 3 in the axial direction, the distance from the front support portion 2a to the propeller fan 8 can be minimized, and vibrations caused by rotation of the fan relative to the fan motor 3 can be reduced.

In addition, the vibration of the fan motor 3 itself is absorbed by the shaft core, which has less vibration, and is indirectly supported through the vibration isolating rubber 4a, 4b, which is the shaft core and the moving core. The amount transmitted to 2b is reduced, and the vibration of the outer box 1 is also reduced. In addition, in this structure, air is sucked in from the heat exchanger 7 side and blown through the guard 2b, but in this case, the guard 2b only needs to have a small wire diameter, and there is no directivity with respect to the wind direction, so a large amount of air can be obtained. At the same time, it has the advantage of reducing wind noise and being lightweight.

The cylindrical flange 2aa has a nearly cylindrical shape with the protrusion of the supporting portion sufficiently outward.

In addition, by making the front shape of the support part cross-shaped, it is possible to prevent the electromagnetic noise of the fan motor 3 and the vibration noise of the case from being generated externally, and also prevent the adhesion of dust and the intrusion of rainwater, as well as prevent the flow of wind. Make it smooth. 9 is a lead wire of the fan motor 3, and 10 is an opening for the lead wire.

〔Effect of the invention〕

According to the present invention, the vibration of the protective guard can be significantly reduced by supporting the shaft core through the anti-vibration rubber, and the supporting portion of the fan motor is made into a protruding shape to surround the fan motor and is supported at both ends of the fan motor. In addition, by positioning the boss part of the propeller fan surrounding the outside of the support part,
Rotational vibration of the fan motor can be reduced.

In addition, these structures allow the main part of the guard to be shaped like a simple wire, which not only increases air volume but also reduces noise, and makes the guard lighter.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an outdoor unit of an air conditioner according to the present invention, and FIG. 2 is a partial front view of the protective guard shown in FIG. 1. 2...Protective guard, 2a...Front support part, 2bb.
... Vertical wire, 3... Fan motor, 4a... Anti-vibration rubber, 4b... Anti-vibration rubber, 8a... Boss portion. Arithmetic 1 Figure

Claims (1)

[Claims] 1. In an air conditioner that has a propeller fan, a heat exchanger at the rear on the suction side, and a fan motor and a protective guard at the front on the discharge side, a front support part is provided in the center of the protective guard to prevent the fan motor's axis. one end in the axial direction of the fan motor, the other end in the axial direction of the fan motor is supported by another rear support part, the outer end of the rear support part is held on the front support side, and the fan motor is supported. is an outdoor air conditioner characterized by having a vibration isolating rubber concentric with the shaft center in the axial direction measurement surface of the fan motor, and having a protruding surface in the axial direction on the front support part or the rear support part. unit.