JPH08307U - Air conditioner outdoor unit - Google Patents

Abstract

(57) [Summary] [Purpose] In a blower for an air conditioner, a blower structure that reduces the diameter of a bell mouth that serves as a guide plate for blowing air. [Structure] A propeller fan 13 is fixed to a shaft 14a of a motor 14 fixed to a motor mount 12, and a beam 1 of a cylindrical bell mouth 15 which serves as a guide for blowing air.
Hole 15 provided in the cylindrical portion 15a supported by 5b
The motor shaft 1 is attached to the bearing 16 fitted in e.
With the 4a inserted, the bell mouth 15 has a screw 18
The screw 18 is inserted into the screw hole 17 of the outer case 3 by means of the screw hole 15d provided in the fin portion 15c of the bell mouth.
It is fixed to the outer case 3 by being screwed on.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air conditioner, and more particularly to an outdoor blower for an outdoor unit.

[0002]

[Prior art]

 The outdoor unit of the air conditioner is, as shown in the cross-sectional view of the main part of FIG. 3 and the perspective view of FIG. A heat exchanger 7 and a propeller fan 13 for air-cooling the heat exchanger 7 are arranged in the heat exchanger chamber 5, and one machine chamber 6 has a compressor 9 and a four-way valve. A unit control unit for controlling these is arranged, and a suction port 11 is provided on the surface of the heat exchanger chamber 5 side facing the heat exchanger 7 and a blowout port 10 is provided on the surface facing the propeller fan 13. It is covered by the outer case 3 provided. In the heat exchanger chamber, a motor 14 having a propeller fan 13 pivotally mounted on a motor mounting base 12 fixed on the base 2 is provided so that the heat generated in the heat exchanger 7 from the blowout port 10 of the outer case 3 is discharged to the outside. It is discharging. A cylindrical bell mouth 15 is attached to the outlet 10 and covers the periphery of the propeller fan 13 as shown in FIG. 3 to enhance the blowing efficiency. However, in terms of safety, it is necessary to prevent contact between the outer circumference of the propeller fan 13 and the inner circumference of the bell mouth 15, and the dimensional difference in the gap between the propeller fan 13 and the bellmouth 15 is different between the accuracy of each part and the propeller fan 8 and the outer case 3. The inner diameter of the bell mouth 15 needs to be set to a considerably large value, which is set in consideration of cumulative errors such as assembly accuracy. For this reason, the gap between the propeller fan 13 and the bellmouth 15 becomes large, which causes a reduction in the blowing efficiency.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above point, and the structure of the bell mouth 15 attached to the outer case 3 is improved so that the inner diameter of the bell mouth 15 can be made as small as possible with respect to the outer dimension of the propeller fan. In addition, the outdoor unit structure of the air conditioner with good ventilation efficiency is provided.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a holding part supported by a radial beam at the center of the bell mouth, and a bearing is fitted into the holding part to pivotally support the propeller fan in the bearing. It is characterized in that it supports the rotating shaft of the motor.

[0005]

[Action]

 With the above configuration, in the outdoor unit of the air conditioner according to the present invention, it becomes possible to minimize the deviation of the central axis of the bell mouth from the central axis of the propeller fan of the outdoor blower, and the propeller The gap between the fan's outer circumference and the bellmouth's inner circumference can be minimized.

[0006]

【Example】

 Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 is an exploded perspective view of an essential part of the present invention, and FIG. 2 is a sectional view of the essential part. A motor mount 12, a motor 14, and a propeller fan 13 axially supported by the motor 14 are arranged in the heat exchanger chamber. In order to improve the air blowing efficiency, the bell mouth 15 is covered so as to cover the propeller fan 13. 3 is screwed on. The bell mouth 15 is a resin-molded cylindrical part, the inner diameter of which is set close to the outer diameter of the propeller fan 13, and a fin portion 15c having a screw hole 15d is formed on the circumference of the cylindrical portion. .. Further, a beam 15b facing the center is radially formed and holds the holding portion 15a at the center of the bell mouth 15. A recessed hole 15e is provided in the center of the holding portion 15a in the propeller fan direction, and a radial bearing 16 is fitted in the recessed hole 15e as shown in a sectional view of a main part of the same. The outer case 3 is provided with a blowout port 10 having a diameter substantially the same as that of the bell mouth 15, and a screw insertion hole 17 around the blowout port 10.

The motor mount 12 is made of sheet metal and is a support base having a motor mount pedestal 12a at the center. The motor 14 is a drive motor for the propeller fan 13 in which the shaft 14a is set longer than that of the conventional product, and is fixed to the mounting base 12a of the motor mounting base 12. After the propeller fan 13 is passed through the shaft 14a of the motor 14, the tip of the shaft 14a is inserted into the bearing 16 attached to the central portion of the bell mouth 15, so that the motor shaft 14a is attached to the bell mouth 15. Is pivotally supported. In this state, the rear screw 18 is inserted into the screw hole 17 of the outer case 3, and further screwed into the screw hole 15d provided in the fin portion of the bell mouth 15, whereby the bell mouth 15 is attached to the outer case 3. Fixed. At this time, even if the center of the blowout port 10 of the outer case 3 and the center axis of the bell mouth 15 are slightly displaced, the diameter of the screw insertion hole 17 is set to be large, and the bell mouth 15 can be screwed without any trouble. be able to.

With the structure and mounting method of the bell mouth 15 according to the present invention, it is possible to mount the bell mouth with the central axis of the motor shaft 14a aligned with the central axis of the motor shaft 14a. The mounting error to be made is sufficient if the manufacturing error of the bell mouth 15 is taken into consideration, and the inner diameter of the bell mouth can be set as small as possible with respect to the outer dimension of the propeller fan.

[0009]

[Effect of device]

 As described above, in the outdoor unit of the air conditioner according to the present invention, the inner diameter of the bell mouth can be set smaller than that of the conventional product, so that the outer shape of the propeller fan and the inside of the bell mouth can be reduced. By setting a small gap with the peripheral part, the blowing efficiency of the blower increases, the cooling efficiency of the heat exchanger increases, and the performance of the air conditioner as an outdoor unit can be improved. Further, the risk of contact between the outer circumference of the propeller fan 13 and the inner circumference of the luma mouth 13 is reduced, and the safety of the device can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of an outdoor unit of an air conditioner according to the present invention.

FIG. 2 is an essential part assembly view showing an embodiment of an outdoor unit of an air conditioner according to the present invention.

FIG. 3 is a cross-sectional view of a main part of an example of an outdoor unit of an air conditioner according to a conventional example.

FIG. 4 is an exploded perspective view of an outdoor unit body of an air conditioner according to a conventional example.

[Explanation of symbols]

 1 Outdoor Unit Main Body 2 Base 3 Outer Body 4 Partition Plate 5 Heat Exchanger Room 6 Machine Room 7 Heat Exchanger 9 Compressor 10 Blowout Port 11 Suction Port 12 Motor Mounting Base 13 Propeller Fan 14 Motor 14a Motor Shaft 15 Bellmouth 15a Holding Part 15b Beam 15c Fin part 15d Screw hole 16 Bearing 17 Screw insertion hole 18 Screw

Claims (1)

[Scope of utility model registration request] 1. A base and a main body constituted by an outer case covering the base are divided into a heat exchanger chamber for accommodating a heat exchanger, a propeller fan and the like by a partition plate and a machine room for accommodating a compressor and the like. Then, a suction port and a blowout port are provided on the outer case on the heat exchanger chamber side, the heat exchanger is arranged facing the suction port, and the repeller fan is arranged facing the blowout port. In an outdoor unit of an air conditioner in which a bell mouth covering the periphery of a propeller fan is attached to an outlet, a holding portion supported by a radial beam is provided at the center of the bell mouth, and a bearing is attached to the holding portion. An outdoor unit for an air conditioner, characterized in that the rotary shaft of a motor that axially supports the propeller fan is rotatably supported by the bearing fitted therein.