JP2002330574A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make dimension in the axial direction of a fan motor small in an air conditioner, and reduce its vibration by equalizing the load distribution in the axial direction. SOLUTION: The air conditioner has a tangential fan 7, a brushless motor 8, a control substrate 9, and a supporting member 19 supporting them; and the fan motor 8 is constituted of a rotor 17 by disposing magnets in ring on the outer peripheral part at the end on one side of the fan body 11 in the axial direction, and constituted by fixing a stator 18 which faces the rotor 17, to the supporting member 19. The control substrate 9 is fixed to the supporting member 19; and the supporting member 19 is supported with a frame 16 of the body of equipment, having the supporting position on the fan side of the control substrate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner having a once-through fan, a brushless motor for driving the fan, and a fan motor having a control board.

[0002]

2. Description of the Related Art A fan motor used in a conventional air conditioner will be described with reference to FIG. FIG. 6 is a configuration diagram of a fan motor unit used in a conventional air conditioner. In the prior art 1, the fan main body 11 of the once-through fan 7 has the rotating shaft 13 and the boss 30 fixed to both side surfaces thereof. The boss 30 is screwed to the rotating shaft 12 of the molded product motor 8. Attachment of the fan body 11 to the frame 16 uses a bearing 15 made of a built-in vibration isolating rubber at one end and a vibration isolating rubber 32 shared with the molded motor 8 at the other end. The molded motor 8 is attached to the frame 16 using a vibration-proof rubber 32 shared with the fan body 11 at one end and a vibration-proof rubber 33 at the other end. As described above, in the prior art 1, the mounting structure for individually supporting the weight of the fan body 11 and the molded motor 8 is provided.

Further, as another fan motor used in a conventional air conditioner or the like, as disclosed in Japanese Patent Application Laid-Open No. H11-89179 (prior art 2), two side plates at both ends of the fan are rotated. The shaft is fixed, and both rotating shafts are rotatably supported by bearings. The motor is a brushless motor, which has a stator and a rotor, and the stator is a support member, an end bracket, a motor drive circuit board, and a fixed. A stator core on which a child coil is wound, and a rotor,
Some have a permanent magnet rotor magnetic pole adhered to a cylindrical portion formed integrally with the fan 2.

[0004]

However, in the prior art 1, the width of the molded product motor 8 is large,
There is a problem that a space for fixing the fan body 11 and the molded product motor 8 is required, and the length in the axial direction becomes long.

In the prior art 2, when one side of the fan motor is mounted on a frame or the like via a bearing and an end bracket and the other side via a bearing, the end portion of the fan motor is smaller than the fan portion formed of resin. The motor part including the stator and the motor drive circuit board supported by the bracket is heavy,
There is a problem that the axial load distribution of the fan motor becomes non-uniform, and the vibration in the axial direction causes fan vibration when the motor is driven. In addition, since the motor drive circuit board is fixed to the support member on the fan side, when the fan motor is used in an air conditioner for cooling operation, a waterproof structure against damp air flowing into the motor drive circuit board is provided. There was a problem that it became necessary and expensive.

An object of the present invention is to provide an air conditioner that can be reduced in size and vibration.

It is another object of the present invention to provide an air conditioner which can be reduced in size and vibration and can be manufactured at low cost.

Another object of the present invention is to provide an inexpensive and highly reliable air conditioner which can be reduced in size and vibration.

[0009]

Means for Solving the Problems To achieve the above object, in an air conditioner according to one of the representative inventions of the present invention, a once-through fan for ventilating a heat exchanger and driving the one-time fan are provided. A brushless motor, a control board for controlling the brushless motor, and a support member for mounting the stator of the brushless motor and the control board, wherein the once-through fan has a rotating shaft integrated on both sides of a horizontally long cylindrical fan body. And the brushless motor is rotatably supported via a bearing. The brushless motor forms a rotor by providing a ring-shaped magnet on an outer peripheral portion of one end in the axial direction of the fan main body, and forms the rotor. The stator facing the child is attached to the support member, and the support member has a support position on the fan side of the control board and is supported by the housing.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The same reference numerals in the drawings of the embodiments and the conventional example indicate the same or corresponding components.

First, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

First, the overall configuration of the air conditioner according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the air conditioner.

The indoor unit 1 has a horizontally long casing 2 constituting its external appearance, an air filter 5 arranged inside a suction port 2a formed in the casing 2, and an air filter 5
, And a through-flow fan 7 that sucks room air through the air filter 5 and the heat exchanger 6 from the suction port 2a and blows out from the blowout port 2b. The housing 2 is a housing main body 3 constituting a rear portion.
And a decorative cover 4 constituting a front part. The decorative cover 4 is detachably attached to the housing body 3.

The indoor unit 1 has a width L of 690 mm ≦ L ≦ 1000 mm and a height H of 240 m.
m ≦ H ≦ 320 mm, depth dimension W is 140 mm ≦ W ≦ 2
In general, the indoor unit 1 according to this embodiment has a horizontally long outer dimension set in a range of 20 mm.
Has a width of 798 mm, a height of 270 mm and a depth of 1
It has a horizontally long outer dimension of 83 mm, and the width is at least twice the height.

The indoor unit 1 is generally installed on an indoor wall or the like in many cases, and is connected to an outdoor unit (not shown) disposed outside through a refrigerant pipe, a power supply connection line, a signal connection line, and the like. Thus, an air conditioner is configured to perform cooling, heating, dehumidification, air purification, air blowing, and other operations.

The housing body 3 has a rear casing 3a, a front casing 3b attached to the front of the rear casing 3a, and an operation display section 3c attached to the front casing 3b.

The cross-flow fan 7 sucks room air through suction air passages formed in front of and above the air, and blows out the air to a blow air passage formed below. An air filter 5 and a heat exchanger 6 are arranged in the suction air passage. On the other hand, the outlet air passage communicates with the outlet 2b. A pair of horizontal wind direction plates 3d and a number of vertical wind direction plates 3e are arranged in the blow air path and the outlet 2b. The heat exchanger 6 constituting a part of the refrigeration cycle includes a plurality of heat exchangers 6a, 6b, 6c.
Are combined.

Here, a basic operation of the air conditioner will be described with reference to a cooling operation. The cooling operation is performed by operating the refrigeration cycle and rotating the fan of the outdoor unit and the once-through fan 7 of the indoor unit 1. The operation of the refrigeration cycle lowers the temperature of the heat exchanger 6.
Further, by the rotation of the cross-flow fan 7, the room air is sucked in from the suction port 2a, and after being removed by the air filter 5, is cooled and dehumidified when passing through each heat exchanger 6, and reaches the cross-flow fan 7, The air is blown into the room from the air outlet 2b through the air flow path. Thereby, a predetermined cooling operation is performed.
During the cooling operation, the horizontal wind direction plate 3d is opened and stopped or rotated at a predetermined position.

Next, a description will be given of a cross-flow fan 7, a brushless motor 8 for driving the fan 7 and a fan motor 10 including a control board 9 and the like of the air conditioner with reference to FIGS. 3 and 4. FIG. FIG. 3 is a configuration diagram of a fan motor unit of the air conditioner, and FIG. 4 is a perspective view of a first support member used for the fan motor unit.

The cross-flow fan 7 includes a horizontally long cylindrical fan body 11 made of synthetic resin, and metal rotating shafts 12 and 13 provided integrally on both sides of the fan body 11. The fan body 11 is formed by combining a large number of individual fans, which are injection-molded with a synthetic resin, in the axial direction.
Are provided integrally during injection molding, and the rotating shaft 13 is provided on the other side.
Are provided integrally during injection molding. Rotary shaft 12
Is mounted near the fan side by press-fitting two bearings 14 on the outer periphery thereof, and a supporting member 19
It is supported rotatably. The rotating shaft 13 is rotatably supported by a frame 16 that constitutes a part of the housing 2 via a bearing 15. The bearing 14 is formed of a rolling bearing, and the bearing 15 is formed of a vibration-proof rubber having a built-in metal bearing. Thus, the cross-flow fan 7 is rotatably supported by the frame 16 via the bearings 14 and 15 on both sides.

The brushless motor 8 includes a rotor 17 formed of a ring-shaped plastic magnet, and a metal stator 18 opposed to the rotor 17. The rotor 17 is attached to the inner periphery of a protruding portion that protrudes in a ring shape from the outer periphery of one end in the axial direction of the fan body 11. The stator 18 is provided inside the inner periphery of the rotor 17 and the two bearings 14.
And is attached to the support member 19 using screws or the like.

The support member 19 includes a bearing 14 and a stator 18.
A first support member 20 made of synthetic resin to be attached, a second support member 21 made of metal to attach the first support member 20 and the control board 9, and an anti-vibration rubber 26 installed on an outer peripheral portion of the second support member 21 are provided. I have.

The first support member 20 is injection-molded with a synthetic resin such as ABS resin, and has a cylindrical portion 22 located between the outer periphery of the bearing 14 and the inner periphery of the stator 18. It has a formed flange portion 23. This cylindrical portion 22
Are axially fixed pawls 24 for holding the two bearings 14 in the axial direction with respect to the outer periphery, and outer peripheral fixed portions 2 for holding the stator 18 on the outer peripheral surface.
Five. This axial fixing claw 24 is composed of two bearings 1.
4 is applied in the axial direction. Also, the flange portion 23
Has a screw hole 23a, and fixes the stator 18 by screwing a screw into the screw hole 23a. Then, the flange portion 23 is fixed to the first support member 20. Therefore, the bearing 14 and the stator 18 are supported by the frame 16 via the first support member 20, the second support member 21, and the vibration isolating rubber 26.

The second support member 21 is formed by drawing into a predetermined shape with a material having strength, such as a plated steel plate, and the bearing 14, the stator 18, and the first support member 20 are on the fan side, and the control board 9 is on the side opposite to the fan. It is installed to partition into. Also,
The second support member 21 has an anti-vibration rubber 26 attached to the entire outer periphery thereof, and is supported by the frame 16 via the anti-vibration rubber 26. Thus, the fan side (motor side) and the opposite fan side (control board side) of the second support member 21 are air-tightly partitioned. The support position of the second support member 21 on the frame 16 is located on the fan side with respect to the control board 9 and is located outside the outer periphery of the stator 18, and particularly includes the stator 18 and the control board 9. The center of gravity of the motor unit is substantially matched.

The control board 9 has components for controlling the brushless motor 8 and the air conditioner mounted thereon.
Is mounted on the side opposite to the fan using screws or the like. In addition, the case 27 includes the control board 9 together with the second support member 21.
Are arranged to hermetically close the second support member 21.
It is detachably attached to the unit by screws or the like.

As described above, the support member 19 supports one side of the cross-flow fan 7, supports the stator 18 and the control board 9 on both sides, and has an outer peripheral portion of the frame through the rubber cushion 26. 16 supported.

The fan motor 10 is constructed by integrally assembling a once-through fan 7, a brushless motor 8, a control board 9, and a support member 19, and this assembly is mounted on a frame 16. The motor unit includes the rotor 17 and the rotating shaft 1.
It comprises two or two bearings 14, a stator 18, a support member 19, a control board 9 and a case 27.

According to this embodiment, a ring-shaped magnet is provided on the outer periphery of one end in the axial direction of the fan main body 11 so that the rotor 1
7, a rotary shaft 12 is provided integrally with the fan body 11 provided with the rotor 17, and the rotary shaft 12 is
And has a function as a rotor by rotatably supporting the fan motor 10 with a simple configuration without requiring a space for a connecting portion unlike a device connecting an independent cross-flow fan and a drive motor. The axial length of the portion can be reduced. Thereby, the size of the air conditioner can be reduced. When the outer dimensions of the air conditioner are the same, the length of the cross-flow fan 7 in the axial direction can be increased to increase the air volume, thereby increasing the capacity of the air conditioner. it can.

Since the support member 19 to which the stator 18 and the control board 9 are mounted is supported by the frame 16 with a support position on the fan side relative to the control board 9, the axial load distribution of the fan motor 10 can be reduced. Uniformity can be prevented, and bending in the axial direction can be prevented. Thereby, the vibration at the time of driving the fan motor 10 can be reduced, and the vibration at the time of operating the air conditioner can be reduced. In particular, since the support position of the support member 19 on the frame 16 substantially coincides with the position of the center of gravity of the motor unit including the stator 18 and the control board 9, vibration reduction during driving of the fan motor 10 is ensured. Therefore, vibration during operation of the air conditioner can be reduced. Further, the support member 19
Since the stator 18 is mounted on the fan side and the control board 9 is mounted on the side opposite to the fan, it is easy to make the axial load distribution of the fan motor 10 uniform from this point as well. Vibration during driving of the motor 10 can be reduced, and vibration during operation of the air conditioner can be reduced. Further, since the support position of the support member 19 on the frame 16 is close to the fan side to the outside of the outer periphery of the stator 18, the fan motor 1
It is easy to make the axial load distribution of 0 uniform, it is possible to reduce the vibration when the fan motor 10 is driven, and it is possible to reduce the vibration when the air conditioner is operating.

Further, since the control board 9 is attached to the second support member 21 on the side opposite to the fan, the stator and the bearing, it is easy to secure a large installation space for the control board 9 in the radial direction. is there. Thereby, not only the electronic components for controlling the brushless motor 8 but also the electronic components for controlling the air conditioner can be mounted on the control board 9,
Compared to a control board having electronic components for controlling the brushless motor 8 and an electronic component for controlling the air conditioner which are independently provided,
Can be easily and inexpensively manufactured,
The space occupied by the control board 9 can be reduced, and the size of the air conditioner can be reduced. As described above, the increase in the weight of the control board 9 by mounting the electronic components for controlling the air conditioner is useful in the present embodiment in making the axial load distribution of the fan motor 10 uniform.

Then, the stator 18 is mounted on the fan side of the support member 19, and the control board 9 is mounted on the side opposite to the fan of the support member 19, and the fan side and the control board side are air-tightly separated by the support member 19. As a result, it is possible to prevent the air cooled by the heat exchanger 6 from flowing into the control board 9 from the fan side, so that the waterproof structure of the control board 9 is not required, and an inexpensive structure and high reliability are provided. Can be. Further, the outer peripheral portion of the second support member 21 is
Since the vibration isolating rubber 26 is supported around the entire circumference, reliable airtightness of the support member 19 and vibration isolation of the fan motor 10 can be achieved. Further, since the case 27 for closing the control board 9 together with the support member 19 is detachably attached to the support member 19, a more reliable waterproof structure of the control board 9 can be obtained, and the fan motor 10 can The case 27 can be attached and detached even after it is attached to the control board 9, so that assembly work and maintenance of the control board 9 can be easily performed. The maintenance of the control board 9 can be performed by removing the decorative cover 4 and then removing the case 27.

The bearing 1 installed on the outer periphery of the rotating shaft 12
Since the stator 18 is located outside the outer periphery of 4, the bearing and the stator are arranged side by side in the axial direction,
The axial length of the fan motor 10 can be reduced. Further, the first support member 20 for mounting the bearing 14 and the stator 18 and the first support member 20 and the control board 9
Since the support member 19 is divided into the second support member 21 to be mounted, the arrangement of the stator 18 outside the outer periphery of the bearing 14 can be easily achieved, and the assemblability of these components is improved. can do. In particular, since the cylindrical portion 22 having the axial fixing claw 24 for holding the bearing 14 in the axial direction and the outer peripheral fixing portion 25 for holding the stator 18 on the outer peripheral surface is provided, the arrangement of the bearing 14 and the stator 18 is reduced. It can be achieved even more easily. Since the preload is applied to the two bearings 14 by the axial fixing claws 24, an inexpensive bearing 14 can be employed, and the displacement of the air conditioner in the axial direction due to vibration during transportation can be prevented. Stable starting operation is possible.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a configuration diagram of a fan motor unit of an air conditioner according to a second embodiment of the present invention. This embodiment is different from the first embodiment in the rotor 17 as described below, and the other points are basically the same as the first embodiment.

In this embodiment, the rotor 17 is formed in a cup shape, and the rotating shaft 12 is integrally provided at the center thereof. Specifically, the rotating shaft 12 is formed by injection molding.
After the rotor 17 is manufactured integrally with the fan body 11, the rotor 17 is integrally provided at one end of the fan body 11. Thereby, the dimensional accuracy of the rotor 17 and the stator 18 can be improved, and the high-performance fan motor 10 can be obtained.

[0035]

According to the present invention, it is possible to obtain an air conditioner capable of reducing the size and reducing the vibration.

Further, according to the present invention, it is possible to obtain an air conditioner which can be reduced in size and vibration and can be manufactured at low cost.

Further, according to the present invention, an inexpensive and highly reliable air conditioner can be obtained while miniaturization and vibration reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the air conditioner.

FIG. 3 is a configuration diagram of a fan motor unit of the air conditioner.

FIG. 4 is a perspective view of a first support member used for the fan motor unit.

FIG. 5 is a configuration diagram of a fan motor unit of an air conditioner according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a fan motor unit used in a conventional air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Case, 3 ... Case main body, 4 ... Makeup cover, 5 ... Air filter, 6 ... Heat exchanger, 7 ... Cross-flow fan, 8 ... Brushless motor, 9 ... Control board, 10 ...
Fan motor, 11: Fan body, 12, 13: Rotating shaft, 14, 15: Bearing, 16: Frame, 17: Rotor, 18: Stator, 19: Support member, 20: First support member, 21: First 2 Support member, 22: cylindrical portion, 23: flange portion, 24: axial fixing claw, 25: outer peripheral fixing portion, 26: anti-vibration rubber, 27: case.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Go Tsurumi 800, Tomita, Ohira-machi, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture Inside the Cooling and Refrigerating Dept., Hitachi, Ltd. (72) Inventor Makoto Ishii 800 Tomita, Ohira-machi, Ohira-machi, Shimotsuga-gun, Tochigi Prefecture F-term (ref.) AA12 BB01 BB07 BB14 BB17 BB26 CC05 CC09 DD17 DD19 FF05 GG01 5H621 AA04 GB10 HH01 JK13

Claims (9)

[Claims] 1. A cross-flow fan that ventilates a heat exchanger, a brushless motor that drives the cross-flow fan, a control board that controls the brushless motor, a support member for mounting the stator of the brushless motor and the control board. The cross-flow fan is provided with a rotating shaft integrally on both sides of a horizontally long cylindrical fan body, and rotatably supported via a bearing.The brushless motor is provided on one side in the axial direction of the fan body. A rotor is formed by providing a ring-shaped magnet on the outer periphery of the end, and a stator facing the rotor is attached to the support member. The support member has a support position closer to the fan than the control board. An air conditioner characterized by being supported by a housing. 2. The air conditioner according to claim 1, wherein the support member has a support position on a fan side of the control board and outside of an outer periphery of the stator, and is supported by a housing. 3. A once-through fan for ventilating the heat exchanger, a brushless motor for driving the once-through fan, a control board for controlling the brushless motor, a support member for mounting the stator of the brushless motor and the control board. The cross-flow fan is provided with a rotating shaft integrally on both sides of a horizontally long cylindrical fan body, and rotatably supported via a bearing.The brushless motor is provided on one side in the axial direction of the fan body. A rotor is provided by providing a ring-shaped magnet on the outer periphery of the end, and a stator facing the rotor is attached to the support member. The support member is a motor part including the stator and the control board. An air conditioner characterized by being supported by a housing at a position substantially at the center of gravity. 4. A cross-flow fan that ventilates a heat exchanger, a brushless motor that drives the cross-flow fan, a control board that controls the brushless motor and the air conditioner, a stator of the brushless motor, and the control board. A support member to be attached, the cross-flow fan is provided integrally with rotating shafts on both sides of a horizontally long cylindrical fan main body, and rotatably supported via bearings; and the brushless motor includes a shaft of the fan main body. A rotor is provided by providing a ring-shaped magnet on the outer periphery of the end on one side in the direction, and a motor stator facing the rotor is attached to the fan side of the support member. Attached to the opposite side of the fan, the support member has a support position on the fan side relative to the control board, and hermetically partitions between the fan side and the control board side An air conditioner characterized by being supported by a housing. 5. An air conditioner according to claim 4, wherein an outer peripheral portion of said support member is supported on a housing through a vibration isolating rubber all around. 6. The air conditioner according to claim 4, wherein a case for closing the control board together with the support member is detachably attached to the support member. 7. A cross-flow fan that ventilates a heat exchanger, a brushless motor that drives the cross-flow fan, a control board that controls the brushless motor and the air conditioner, a stator of the brushless motor, and the control board. A supporting member to be attached, the cross-flow fan is provided with a rotating shaft integrally on both sides of a fan body having a horizontally long cylindrical shape, and a bearing is installed on an outer periphery of the rotating shaft on both sides to rotatably support the rotating shaft; The brushless motor is configured such that a rotor is provided by providing a ring-shaped magnet on an outer peripheral portion of one end in the axial direction of the fan main body, and a stator facing the rotor is located outside the outer periphery of the bearing. The support member includes a first support member for mounting the bearing and the stator, and a second support member for mounting the first support member and the control board. An air conditioner characterized by being supported with a support located on the fan side of the control board to the housing. 8. The apparatus according to claim 7, wherein the first support member comprises:
An air conditioner comprising: an axial fixing claw that holds the bearing by applying a preload in the axial direction; and an outer peripheral fixing portion that holds the stator on an outer peripheral surface. 9. The air according to claim 1, wherein a rotor having a cup-shaped plastic magnet is integrally provided on an outer peripheral portion of one end in the axial direction of the fan body. Harmony machine.