JP2016044868A - Outdoor equipment and air conditioner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide outdoor equipment which enables increase of the air quantity, shaft power reduction, and noise reduction.SOLUTION: Outdoor equipment of the invention includes: a housing; a blower disposed at a housing upper part and configured to blow air from a housing interior part to a housing exterior part; a motor positioned at the upstream side of the blower and configured to drive the blower; a motor casing covering the motor; a rotary shaft which transmits a rotational force of the motor to the blower; and bearings holding the rotary shaft. Projection areas of the bearings are smaller than a projection area of the motor casing when viewed in a rotary shaft direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an outdoor unit having a blower and an air conditioner including the outdoor unit.

  2. Description of the Related Art Conventionally, an air conditioner has at least one propeller fan, a motor is arranged upstream of the propeller fan, and the propeller fan is driven by the motor to blow air inside the outdoor unit and the heat exchanger. The outdoor unit is known.

JP-A-11-223365

  Although the outdoor unit of an air conditioner is required to be highly efficient, compact, and low in noise, as disclosed in Patent Document 1, the distance between the propeller fan and the upstream obstacle is set long. Thus, it is intended to reduce pressure loss, increase the amount of air flow, and reduce shaft power.

  In addition, since the motor mounted on the outdoor unit installed outdoors is a so-called outdoor type, it is covered with a highly sealable casing to prevent rainwater from entering, and against the fan placed downstream It has a position and shape that tends to cause air resistance. For this reason, if the distance between the propeller fan and the casing is set to be long, effects of increasing the air volume, reducing the shaft power, and reducing the noise can be expected.

  Further, it is generally known that the amount of air flow is increased by setting a so-called chip clearance which is a gap between the fan outer diameter and the shroud inner diameter small.

  However, when the distance between the fan and the motor is increased, the rigidity of the rotating shaft that supports the fan is reduced, and the fan outer diameter portion and the shroud inner diameter portion may interfere with each other, so the distance between the fan and the casing increases. There was also a limit.

  An object of the present invention is to provide an outdoor unit capable of increasing air volume, reducing shaft power, and reducing noise.

  The outdoor unit of the present invention includes a housing, a blower that is disposed on the top of the housing, sends air from the inside of the housing to the outside of the housing, a motor that is located upstream of the blower and drives the blower, and a motor that covers the motor A casing, a rotating shaft that transmits the rotational force of the motor to the blower, and a bearing that holds the rotating shaft, and the projected area in the rotating shaft direction of the bearing is configured to be smaller than the projected area in the rotating shaft direction of the motor casing. The

  According to the present invention, the distance between the fan and the casing can be set longer by the bearing that holds the rotating shaft that connects the fan and the motor, and the air resistance by the bearing is reduced, so that the air volume increases, the shaft power decreases, An outdoor unit capable of reducing noise can be provided.

The figure which showed the ventilation structure of the outdoor unit of 1st Embodiment The figure which showed the principal part of the fan of 1st Embodiment of this invention, a motor, and a bearing part. The perspective view which showed the principal part of the fan of this invention, a motor, and a bearing part. The perspective view which showed the modification of the bearing part The perspective view which showed the modification of the bearing part The figure which showed the ventilation structure of the outdoor unit of 2nd Embodiment The figure which showed the principal part of the fan of 2nd Embodiment, a motor, and a bearing part. Diagram showing the structure when the air flow is changed in the horizontal direction

  The outdoor unit of the present invention includes a housing, a blower that is disposed on the top of the housing, sends air from the inside of the housing to the outside of the housing, a motor that is located upstream of the blower and drives the blower, and a motor that covers the motor A casing, a rotating shaft that transmits the rotational force of the motor to the blower, and a bearing that holds the rotating shaft, and the projected area in the rotating shaft direction of the bearing is configured to be smaller than the projected area in the rotating shaft direction of the motor casing. The According to the outdoor unit of the present invention, the distance between the fan and the casing can be set longer by the bearing that holds the rotating shaft that connects the fan and the motor, and the air resistance by the bearing can be reduced. Reduction and noise reduction are possible.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the structure of the outdoor unit of this embodiment. The air conditioner includes an outdoor unit 1 and an indoor unit (not shown), which are connected by a refrigerant pipe, and perform cooling and heating operations by carrying heat by the refrigerant. The outdoor unit 1 of the air conditioner shown in FIG. 1 contains a propeller fan 2, a motor 3, a rotating shaft 4, a shroud 5, a motor clamp 6 that supports the motor, a heat exchanger 7, a compressor 9, and electrical equipment. The electric box 8 and a casing containing them.

  A bearing 13 is installed between the propeller fan 2 and the motor 3, and the bearing 13 is fixed to the motor casing 20 via a bracket 15.

  FIG. 2 shows the internal structure of the motor 3. A rotor 18, a stator 19, and a motor casing 20 are installed around the rotation shaft 4 of the propeller fan 2. A bearing 13 is installed on a bracket 15 attached to the motor casing 20.

  The propeller fan 2 is driven by the rotation of the motor 3 to generate an air flow. The air sucked from the outside of the outdoor unit 1 exchanges heat while passing through the heat exchanger 7, and then flows into the propeller fan 2 with the flow direction facing upward. If the motor 3 is disposed upstream of the propeller fan 2 and the distance between the propeller fan 2 and the motor 3 (motor casing 20) is small, it becomes difficult for air to be supplied to the center side of the propeller fan 2, and the fan blowing amount is reduced. .

  In the present embodiment, since the bearing 13 that holds the rotating shaft 4 is provided, the distance from the motor 3 can be set long. That is, since the rotating shaft 4 is rotatably fixed by the bearing 13, a reduction in rigidity due to the length of the rotating shaft 4 is suppressed, and the risk of interference between the inner diameter portion of the shroud 5 and the propeller fan 2 can be suppressed. Thus, it is possible to avoid the risk of interference and increase the air volume, reduce the shaft power, and reduce the noise. Further, since the projected area of the bearing 13 in the direction of the rotation axis is configured to be smaller than the projected area of the motor casing 20 in the direction of the rotation axis, the air resistance by the bearing 13 can be reduced, so that the reduction in the amount of blown air can be suppressed. Furthermore, since the bracket 15 is configured such that air flows around the bearing portion 13, the amount of blown air can be increased, and the blower efficiency can be increased.

  Further, the pressure loss can be further reduced by downsizing the bearing portion 13 and the bracket 15 as shown in FIGS.

  A second embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows the structure of the outdoor unit of this embodiment. The main parts constituting the outdoor unit of the air conditioner shown in FIG. 6 have the same structure as that of the first embodiment, but the bracket 22 is supported by the motor clamp 6. In this structure, since the motor 3 is supported and fixed, the structure can be fixed more firmly than in the first embodiment.

  Also, in the structure in which air flows in the horizontal direction shown in FIG. 8, interference between the propeller fan and the shroud can be avoided.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Propeller fan 3 Motor 4 Rotating shaft 5 Shroud 6 Motor clamp 7 Heat exchanger 8 Electric box 9 Compressor 10 Accumulator 11a Side plate 12 Bottom plate 13 Bearing 14 Bearing 15 Bracket 16 Rubber seal 17 Partition member 18 Rotor 19 Stator 20 Motor casing 21 Rotating shaft casing 22 Bracket 23 Upper plate

Claims (3)

The body,
A blower that is arranged at the top of the housing and sends air from inside the housing to the outside of the housing;
A motor that is located upstream of the blower and drives the blower;
A motor casing covering the motor;
A rotating shaft that transmits the rotational force of the motor to the blower;
A bearing for holding the rotating shaft;
With
The outdoor unit, wherein a projected area of the bearing in the direction of the rotation axis is smaller than a projected area of the motor casing in the direction of the rotation axis. In claim 2,
A bracket for supporting the bearing;
A motor clamp for supporting the motor;
With
An outdoor unit, wherein the bracket is attached to the motor clamp. Indoor unit,
The outdoor unit according to claim 1 or 2,
An air conditioner comprising: