JPH06173896A - Outdoor unit of blower and air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] The structure is simple, the necessary parts and materials are narrowed down to a minimum, and it is inexpensive, resistant to deterioration due to stress and thermal adverse effects, and provides reliable vibration isolation. Provide a blower that contributes to noise reduction. A hub portion 10 is provided integrally with a motor 1, a boss portion 11 inserted into a rotary shaft 2 of the motor, and an outer peripheral side of the boss portion, and a plurality of blade blades 6 are provided on the outer peripheral surface thereof. And a fan 3 composed of a fan and an outer peripheral side of the hub portion of the fan, and penetrates through the boss portion and the center of the rotation axis of the motor, and protrudes from the hub portion at the central axis symmetrical position on the same straight line. The clip spring 12 is made of an elastic metal wire that is attached and fixed to the rotating shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower and an outdoor unit of an air conditioner equipped with this blower.

[0002]

2. Description of the Related Art In an outdoor unit of an air conditioner, an outdoor heat exchanger and an outdoor blower are arranged in the unit body so as to face the outdoor heat exchanger, and the outdoor blower is driven together with a refrigeration cycle operation. To be done.

The outdoor blower is designed so that outside air is taken into the unit body and is further blown to the outdoor heat exchanger to perform heat exchange action with the refrigerant flowing inside the heat exchange pipe. As the outdoor blower, a blower having a so-called propeller fan type as shown in FIG. 5 is usually used.

Reference numeral 1 designates a motor, generally an induction motor is frequently used, and means for controlling the wave number of the AC power supply voltage supplied to the motor 1 or the phase of the AC power supply voltage supplied to the motor. Means for controlling the number of rotations of the motor 1 to an optimum state. A fan 3 is fitted and fixed to the rotary shaft 2 of the motor 1.

The fan 3 is press-fitted and fixed to the rotary shaft 2 of the motor 1 or screwed, a hub portion 5 integrally provided on the outer periphery of the boss portion 4, and a hub portion 5 of the hub portion 5. It is composed of a plurality of blade blades 6 which are integrally provided on the outer peripheral surface.

Such a propeller type fan 3 is
It is an integrally molded product that is manufactured by using a resin molding machine such as an injection machine using a glass fiber-containing AS (acrylic styrene) resin material or the like as a material.

By the way, the wave number control means and the phase control means for optimizing the rotation speed of the motor 1 are not driven by a stable sine wave waveform, but forcedly destabilize the waveform. Is a feature.

Due to such waveform distortion, in the motor 1, pulsation of rotational torque, abnormal vibration or resonance is likely to occur, which is transmitted to the fan 3 via the rotating shaft 2 and causes noise. Becomes In order to eliminate this kind of problem, conventionally, for example, a vibration isolation structure as shown in FIG. 7 is adopted.

Here, a hub portion 20 integrally provided with a blade blade (not shown) and a boss portion 21 provided on the inner peripheral side of the hub portion 20 and concentric with the hub portion 20 are made of a synthetic resin material. And are molded integrally with each other.

A metal ring 22 is integrally provided on the inner peripheral side of the boss portion 21, and an aluminum boss 23 is attached to the inner peripheral side of the ring 22 by a vulcanization bonding of a vulcanizing rubber 24 which is an elastic member. Are integrally provided.

The rotating shaft 2 of the motor 1 is attached to the aluminum boss 23.
The screw part 2 in which the screw is inserted and provided at the tip of the rotary shaft 2.
A set screw 26 is screwed onto the shaft 5, and the fan 3 is fitted and fixed onto the rotary shaft 2.

In this way, the boss portion 21 of the fan 3 is provided with the vibration-proof means 27 consisting of the ring 22, the aluminum boss 23 and the added rubber 24, which are blade blades 6 ... And it is molded at the same time as the molding of the boss portion 21.

[0013]

According to this type of vibration isolating structure, the pulsating torque generated by the motor 1 is absorbed by the vulcanizing rubber 24, and a certain noise damping effect is recognized.

However, the vulcanized rubber 24 is deteriorated due to the influence of stress or deteriorated due to thermal influence, loses elasticity at an early stage, or is ruptured and deformed, and there is a large variation in manufacturing. Further, many processing parts / materials such as the ring 22, the aluminum boss 23, and the vulcanized rubber 24 are required, so that the number of processing steps is increased and the cost is greatly affected. On the other hand, the rotation speed control means of the motor 1 is indispensable, and it is desired to improve the means for attenuating the vibrations and noises that accompany it. In particular, this type of blower is arranged in the outdoor unit of the air conditioner, as described above.

The indoor unit arranged in the air-conditioned room is also provided with a blower, and in consideration of the operation at night, the blower is provided with measures against the attenuation of operating noise up to a state close to the limit. There is. However, while the blower provided in the outdoor unit is relatively large, a reliable vibration damping effect cannot be obtained, and operating noise cannot be ignored.

The present invention has been made in view of the above circumstances, and its first object is to be structurally simple, to reduce the necessary parts and materials to a minimum, to be inexpensive and to reduce stress. (EN) Provided is a blower that is less likely to be deteriorated by heat and adversely affected by heat, yet has reliable vibration isolation, and contributes to noise reduction. A second object is to provide an outdoor unit of an air conditioner that is provided with the above-mentioned blower and that reduces the operating noise.

[0017]

According to a first aspect of the present invention, a motor, a boss portion fitted into a rotary shaft of the motor and an outer peripheral side of the boss portion are integrally provided, and a plurality of boss portions are provided on the outer peripheral surface thereof. A fan including a hub portion provided with blade blades, and a hub that is inserted from the outer peripheral side of the hub portion of the fan, penetrates the boss portion and the center of the rotation axis of the motor, and is located at a central axis symmetrical position on the same straight line. The blower further comprises: a vibration-proof fixing means which is made of an elastic metal wire and which protrudes from the outer peripheral surface of the portion and fixes and attaches the fan to the rotary shaft.

A second invention is a blower comprising a motor and a fan which is fitted into the rotary shaft of the motor and is fixedly mounted on the rotary shaft via a vibration-proof fixing means made of an elastic metal wire. An outdoor unit of an air conditioner, comprising: a heat exchanger that performs heat exchange with a refrigerant through which heat exchange air is conducted by the blower so as to conduct inside.

[0019]

In the first aspect of the present invention, since the vibration-proof fixing means is composed of the elastic metal wire, it is less susceptible to deterioration due to stress and adverse effects due to heat, so that the pulsating torque of the motor is reliably attenuated, and operating noise is reduced. Make a reduction. In the second aspect of the present invention, since the blower with less operating noise is provided, it is possible to avoid annoyance to the neighborhood when driving at night, for example.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The basic structure of the blower S is, as shown in FIG. 5, previously fitted and fixed to the motor 1 to which the rotation speed control means is electrically connected, and the rotation shaft 2 of this motor 1. There is no change in that it consists of a propeller type fan 3. Further, the fan 3 has the blade blades 6 having the same shape and structure as the conventional one, and is comparable to the blowing performance.

As shown in FIG. 1, a new hub portion 10 and a boss portion 11 constituting the fan 3 are fixedly attached to the rotary shaft 2 of the motor 1 via a clip spring 12 which is a vibration-proof fixing means. It The hub portion 10 and the boss portion 11 are also shown in FIGS. 2 and 3.

Along the central axis OL, the boss portion 11 having a fitting hole 13 having a diameter into which the rotary shaft 2 of the motor 1 can be fitted is provided, and a predetermined space is provided on the outer peripheral side of the boss portion 11. Then, the hub portion 10 concentric with the boss portion 11 is provided. One end surfaces of the boss portion 11 and the hub portion 10 are connected by a connection bottom surface portion 14, and these are connected to the blade blades 6 ...
At the same time, it is integrally molded using a synthetic resin material.

A holder portion 15 is provided on a part of the outer peripheral surface of the hub portion 10.
Are provided so as to integrally project. The holder portion 15 has a uniform thickness that is thicker than the wire diameter of the clip spring 12 described later, and the upper and lower end surfaces thereof are gently curved when viewed from the front.
It is almost rectangular.

A pair of concave portions 15a, 15a are formed along the upper and lower end surfaces of the holder portion 15 in the figure. The interval dimension L'of these recesses 15a, 15a must be set accurately. Further, along the one side edge of the holder portion 15, a pair of insertion locking holes 16 and 16 are provided with a center interval dimension a.

The insertion locking holes 16 and 16 and the insertion locking holes 17 and 17 at the center axis symmetrical position of the hub portion 10 via the center axis OL have an accurate center interval dimension a. Is provided. The diameters of all insertion and output hook holes 16 and 17 are
It is very slightly larger than the wire diameter of the clip spring 12. Insertion of the boss portion 15 provided in the hub portion 10,
Penetration holes 18 are provided at positions along a straight line connecting the output hook holes 16 and 17.

That is, a total of four through holes 18 ... Are provided at axially symmetrical positions with the central axis OL in between. Naturally, the distance a between the centers of the holes 16 and 17 is the same. All the through holes 18 ... Are set to have a diameter sufficiently larger than the wire diameter of the clip spring 12. As shown in FIG.
The clip spring 12 using the elastic metal wire is formed.

The clip spring 12 has a stopper portion 12a whose one end is bent and formed in a substantially C-shape, and both ends of the stopper portion 12a. Parallel insertion part 12b with the space dimension a
Composed of and.

The vertical dimension L of the stopper portion 12a is determined by the concave portions 15a, 15 of the holder portion 15.
It is set to be equal to or slightly smaller than the interval dimension L'of a. (L≤L ')

As shown in FIG. 1 again, the rotary shaft 2 is provided with a pair of mounting holes 19, 19 penetrating in the direction orthogonal to the central axis OL. These mounting holes 1
9 and 19 are set to have the same center interval dimension a and the same diameter as the insertion and output hook holes 16 and 17.

The clip spring 12 is inserted into the insertion locking hole 16 of the hub portion 10 from the tip of the fitting insertion portion 12b, and further, the through hole 18 on one side of the boss portion 11 and the mounting hole 19 for the rotary shaft 2 are provided. Also, it projects from the insertion locking hole 17 via the through hole 18 on the other side. Clip spring 1
It is extremely easy if the stopper portion 12a provided at one end of 2 is used.

Since the through hole 18 is sufficiently large with respect to the wire diameter of the clip spring 12, the through hole 18 does not interact with each other, but the insertion and output hook holes 16 and 17 and the mounting hole 19 are provided.
Is in a fitted state with a very small dimension difference from the wire diameter of the clip spring 12. Fitting insertion portion 12b of clip spring 12
The stopper portion 12a provided at the other end is engaged with the holder portion 15 in a state where the is completely pushed.

That is, the interval dimension L of the stopper portion 12a
And the space dimension L ′ between the recesses 15a of the holder portion 15 are L ≦
Since there is a relationship of L ', the stopper portion 12a is pushed into the holder portion 15 by pushing the stopper portion 12a extremely strongly.
It is possible to ride over the peripheral edge and reliably engage with the recess 15a. In this state, the fan 3 is attached to the motor rotating shaft 2 via the clip spring 12, and the blower S
Is configured. When the rotational speed control means optimally controls the rotational speed of the motor 1 to drive the motor 1 to perform the air blowing action, a pulsating torque is generated in the motor 1 due to the characteristics of the control means.

Of the vibrations transmitted from the motor rotary shaft 2 to the fan 3, the so-called torsional vibration, which is the twisting of the rotary shaft 2 in the rotational direction, is the largest, but the clip spring 12 efficiently damps this.

That is, the through hole 18 provided in the boss portion 11 has no relation to the clip spring 12 due to the setting of its diameter, but the insertion and output hook holes 16 provided in the hub portion 10, 17, and the clip spring 12 is inserted into the mounting hole 19 provided in the motor rotating shaft 2 and directly related thereto.

The torsional vibration generated by the motor 1 is generated by the rotating shaft 2
-Clip spring 12-Insertion and output retaining holes 16 and 17-Hub portion 10-Blade blade 6 are sequentially transmitted, but since clip spring 12 is an elastic body, vibration from rotating shaft 2 to fan 3 is generated. Can be efficiently damped, and a reduction in operating noise can be obtained. At the same time, the clip spring 12 can obtain vibration damping even for axial vibration for the same reason as torsional vibration. Moreover, since the clip spring 12 is made of a metal wire rod, it is semipermanently maintained in durability without being deteriorated by stress or being adversely affected by heat. As shown in FIG. 7, the blower S having the above-described configuration is arranged in the outdoor unit Y of the air conditioner.

In the outdoor unit Y, an outdoor heat exchanger 31 formed in an L shape in plan view is arranged and housed in a rectangular box-shaped unit body 30, and a blower is provided on one side surface of the unit body 30. An outlet 32 is provided, and a suction port (not shown) is provided on the other side surface. A grill 33 is fitted in the outlet 32, and a bell mouth portion 34 is further provided to surround the fan 3 of the blower S.

Along with the start of the refrigeration cycle operation, the blower S
Is driven to rotate, and outside air, which is heat exchange air, is guided into the unit body 30. Further, the outside air is the outdoor heat exchanger 31.
Is conducted to exchange heat with the refrigerant introduced therein and is discharged to the outside.

The blower S is equipped with the anti-vibration fixing means 12 as described above, and damps all the torsional vibrations and axial vibrations transmitted from the rotary shaft 2 due to the rotation speed control of the motor 1. And prevent the generation of noise. As a result, even if driving at night, the influence on the neighborhood is small.

Of course, the clip spring as the vibration-proof fixing means 12 is not limited to the above-mentioned shape and structure. In short, the fan 3 is inserted from the outer peripheral side of the hub portion 10, penetrates the boss portion 11 and the center of the motor rotation shaft 2, and protrudes from the symmetric position of the hub portion 10 center axis on the same straight line, so that the fan 3 is rotated. Any elastic metal wire may be used as long as it is attached and fixed to the wire 2. Further, the present invention is not limited to the structure of each embodiment, and within the scope of the invention,
Of course, various modifications can be made.

[0041]

As described above, according to the first aspect of the present invention, the hub is inserted from the outer peripheral side of the hub portion of the fan, penetrates the boss portion and the center of the rotation axis of the motor, and is located on the collinear center axis symmetrical position. Since it is a blower that is equipped with a vibration-proof fixing means that is made of a metal wire material that has elasticity, that projects from the portion and that attaches and fixes the fan to the rotating shaft,

The anti-vibration fixing means is structurally simple, the necessary parts and materials are narrowed down to a minimum, and it is inexpensive, less susceptible to deterioration due to stress and thermal adverse effects, and provides reliable anti-vibration. It has effects such as contributing to noise reduction.

A second aspect of the present invention is a fan including a fan which is fitted into the rotary shaft of the motor and which is fixed to the rotary shaft through vibration-proof fixing means made of elastic metal wire, and a heat exchanger. Since it is the outdoor unit of the air conditioner including the above, it is possible to reduce the operating noise of the blower in particular, and it is possible to obtain the effect of eliminating defects that may occur in the vicinity.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a fan mounting fixing structure of a clip spring with respect to a motor rotating shaft according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the main part of the fan of the embodiment.

FIG. 3 is a perspective view of a main part of the fan of the embodiment.

FIG. 4 is a perspective view of a clip spring according to the embodiment.

FIG. 5 is a perspective view of a general blower.

FIG. 6 is a perspective view of an outdoor unit of the air conditioner of the embodiment.

FIG. 7 is a vertical cross-sectional view of a fan mounting and fixing structure for a motor rotating shaft, showing a conventional example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Rotating shaft, 11 ... Boss part, 6 ... Blade wing, 10 ... Hub part, 3 ... Fan, 12 ... Anti-vibration fixing means (clip spring), S ... Blower, 31 ... Heat exchanger.

Claims (2)

[Claims] 1. A motor, a boss portion fitted into a rotary shaft of the motor, and a hub portion integrally provided on the outer peripheral side of the boss portion and having a plurality of blade blades on the outer peripheral surface thereof. The fan is inserted from the outer peripheral side of the hub portion of the fan, penetrates the boss portion and the center of the rotation shaft of the motor, and protrudes from the outer peripheral surface of the hub portion on the collinear position symmetrical with respect to the central axis. A blower, comprising: an anti-vibration fixing means made of a metal wire material having elasticity, which is attached and fixed to the blower. 2. A blower comprising a motor, and a fan fitted into the rotary shaft of the motor and fixed to the rotary shaft via vibration-proof fixing means made of an elastic metal wire, and a blower provided by the blower. An outdoor unit for an air conditioner, comprising: a refrigerant through which heat exchange air is conducted to flow inside and a heat exchanger that performs a heat exchange action.