JPH0996425A - Outdoor equipment of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide outdoor equipment of an air conditioner capable of making compatible a definite support of an air supply fan with an enhancement of an appearance. SOLUTION: A front member 13, which comprises a bell mouth 5, a support rod 6 and a motor mounting area 7, is integrally molded with resin where a fan motor 4 is mounted on the motor mounting area 7. The support rods 6, whose number is more than the number of vanes of an air supply fan 3, are laid out radiatingly. An air guide passage 9, which guides the suction side air to the side of the fan motor 4 is hollow-molded on the support rods 6 while a ventilating unit 10, which communicates with the front and rear sides of the front member 13, is provided in the motor mounting area 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner, which is characterized by a support structure for a drive motor of a blower fan.

[0002]

2. Description of the Related Art In a conventional outdoor unit for an air conditioner, a motor mount is erected in a casing, and a drive motor for a blower fan is fixed to the motor mount. However, in such a structure, there is a problem in that the motor mount blocks the air passage, which increases ventilation resistance and deteriorates air blowing performance. As a solution to this problem, for example, the one described in JP-A-60-820385 can be mentioned. FIG. 5 is a vertical cross-sectional view of the outdoor unit of the air conditioner. As shown in the figure, in this outdoor unit, an outdoor heat exchanger 32 is provided on the back side (right side in the figure) of the casing 31, and a blower fan 33 is arranged in front of it (left side in the figure). In addition, the casing 3
1 is provided with a front grill 42, and the motor mounting leg 36 is formed integrally with the front grill 42.
The blower fan 33 is supported and fixed by attaching the fan motor 34 to the. Further, a bell mouth 35 is provided on the back surface of the front grill 42 so as to surround the outer periphery of the blower fan 33, and the action of the bell mouth 35 causes the front grill 4 to move from the rear side of the outdoor heat exchanger 32.
2 A wind passage is formed forward.

In the outdoor unit of the air conditioner, the fan motor 34 is provided in front (downstream side) of the boss 33a of the blower fan 33.
The mounting mechanism is installed. Therefore, this attachment mechanism does not block the air passage, so that it is possible to reduce the ventilation resistance and improve the air blowing performance.

[0004]

In the outdoor unit of the air conditioner, the blower fan 33 is supported and fixed by the motor mounting leg 36 formed integrally with the front grill 42. Therefore, the front grill 42 is required to have sufficient rigidity so as to surely support and fix the blower fan 33. On the other hand, the front grill 42 is also intended to improve the external appearance, and therefore the front grill 42 and the above support rigidity are also required. It is necessary to satisfy both. However, it is not always easy to achieve both rigidity and appearance in the front grill 42, and sometimes the two may be in a competing relationship, so it is difficult to have both sufficient rigidity and excellent appearance. There was a problem.

The present invention has been made to solve the above-mentioned conventional drawbacks, and a first object thereof is an air conditioner capable of achieving both reliable support of a blower fan and improvement of appearance. It is to provide an outdoor unit of an air conditioner, and a second object thereof is to provide an outdoor unit of an air conditioner capable of maintaining improved ventilation performance by reducing ventilation resistance.

[0006]

Therefore, an outdoor unit for an air conditioner according to a first aspect of the present invention comprises a blower fan 3, a drive motor 4 for the blower fan 3, and a bell mouth 5 surrounding the outer periphery of the blower fan 3. The outdoor unit of the air conditioner is characterized in that the drive motor 4 is supported and fixed by the support member 11 fixed to the bell mouth 5.

In the outdoor unit for an air conditioner according to claim 1,
Since the support member 11 of the drive motor 4 is fixed to the bell mouth 5, it is possible to improve the appearance and surely support the blower fan 3 at the same time. Further, since the assembling accuracy between the bell mouth 5 and the blower fan 3 is improved,
It is possible to reduce the clearance between the two.

The outdoor unit for an air conditioner according to a second aspect of the invention is characterized in that the support member 11 is formed integrally with the bell mouth 5.

In the outdoor unit for an air conditioner according to claim 2,
It is possible to further improve the assembly accuracy between the bell mouth 5 and the blower fan 3.

Further, the outdoor unit of the air conditioner according to claim 3 is:
The support member 11 includes a motor mounting portion 7 for fixing the drive motor 4, and a plurality of support rods 6 extending radially from the bell mouth 5 to support the motor mounting portion 7.
This support rod 6 is characterized in that its number is different from the number of blades of the blower fan 3.

In the outdoor unit for an air conditioner according to claim 3,
Since the number of blades of the blower fan 3 and the number of the support rods 6 are different, it is possible to prevent the blades and the support rods 6 from being in phase even when the blower fan 3 is driven.

An outdoor unit for an air conditioner according to a fourth aspect is characterized in that the number of the support rods 6 is larger than the number of blades of the blower fan 3.

In the outdoor unit for an air conditioner according to claim 4,
Since the number of support rods 6 is larger than the number of blades, it is possible to obtain sufficient support rigidity while avoiding the phase matching.

An outdoor unit for an air conditioner according to a fifth aspect of the present invention is characterized in that the support rods 6 are provided so that the angles formed between the adjacent support rods 6 are different from each other.

In the outdoor unit for an air conditioner according to claim 5,
It is possible to reliably avoid the phase matching between the blade and the support rod 6 when the blower fan 3 is driven.

In an outdoor unit for an air conditioner according to a sixth aspect of the present invention, the support rod 6 has a flat cross section, and the longitudinal direction of the cross section and the blowing direction of the blower fan 3 are substantially the same. It is characterized by being.

In the outdoor unit for an air conditioner according to claim 6,
Since the cross-sectional longitudinal direction of the support rod 6 and the blowing direction are substantially the same, it is possible to reduce the ventilation resistance.

An outdoor unit for an air conditioner according to a seventh aspect of the present invention is characterized in that the support rod 6 is provided so that the longitudinal direction of its cross section is substantially orthogonal to the blower blade surface of the blower fan 3.

In the outdoor unit for an air conditioner according to claim 7,
It is possible to further reduce the ventilation resistance.

An outdoor unit for an air conditioner according to an eighth aspect of the present invention is characterized in that the support rod 6 has a blade-shaped cross section.

In the outdoor unit for an air conditioner according to claim 8,
Ventilation resistance can be further reduced.

In the outdoor unit for an air conditioner according to a ninth aspect of the present invention, the support rod 6 is formed such that the dimension of the support rod 6 in the direction substantially orthogonal to the blowing direction of the blowing fan 3 is smaller in the intermediate portion than in both end portions. It is characterized by being.

In the outdoor unit for an air conditioner according to claim 9,
The above-mentioned dimension is made smaller in both ends of the support rod 6, that is, in the intermediate portion sandwiched between these portions than in the portion close to the bell mouth 5 or the motor mounting portion 7. Therefore, it is possible to reduce the ventilation resistance at the intermediate portion while surely supporting the blower fan 3 at both ends.

An outdoor unit for an air conditioner according to a tenth aspect of the present invention is characterized in that the support rod 6 is formed so that the above-mentioned dimension changes smoothly from its intermediate portion to both end portions.

In the outdoor unit for an air conditioner according to the tenth aspect, since the dimensions are changed smoothly, it is possible to avoid turbulence in the air flow.

An outdoor unit for an air conditioner according to an eleventh aspect is characterized in that all of the support rods 6 are arranged on substantially the same plane.

In the outdoor unit of the air conditioner according to the eleventh aspect, it becomes possible to enhance the support rigidity.

An outdoor unit for an air conditioner according to a twelfth aspect of the present invention is characterized in that the motor mounting section 7 is provided with a ventilation section 10 for circulating the air blown by the blower fan 3 around the drive motor 4.

Here, the periphery of the drive motor 4 refers to a range in which heat generated by the drive motor 4 can be removed by blowing air.

In the outdoor unit for an air conditioner according to the twelfth aspect of the invention, it becomes possible to cool the drive motor 4 by the air blown through the ventilation section 10.

An outdoor unit for an air conditioner according to a thirteenth aspect is characterized in that the support rod 6 is provided with an air guide passage 9 for guiding the air on the suction side to the periphery of the drive motor 4.

In the outdoor unit for an air conditioner according to the thirteenth aspect, it is possible to cool the drive motor 4 by the air guided by the air guide passage 9.

An outdoor unit for an air conditioner according to a fourteenth aspect is characterized in that the air guide passage 9 is formed by a hollow layer of the support rod 6.

In the outdoor unit for an air conditioner according to claim 14, the outer shape of the support rod 6 can be maintained.

An outdoor unit for an air conditioner according to a fifteenth aspect of the present invention is characterized in that the air guide passage 9 is provided with an outlet passage 10a opening from the periphery of the drive motor 4 toward the downstream side.

In the outdoor unit for an air conditioner according to the fifteenth aspect, since the air can be circulated in the air guide passage 9 reliably, the cooling of the drive motor 4 can be ensured.

An outdoor unit for an air conditioner according to a sixteenth aspect of the present invention is characterized in that the support member 11 is made of resin.

In the outdoor unit for an air conditioner according to the sixteenth aspect, the use of resin makes it possible to facilitate the implementation.

An outdoor unit for an air conditioner according to a seventeenth aspect is characterized in that the blower fan 3 is arranged on the upstream side of the drive motor 4.

In the outdoor unit for an air conditioner according to the seventeenth aspect, it is possible to optimize the arrangement of the blower fan 3 to make the device compact and reduce the ventilation resistance.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the outdoor unit of the air conditioner of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional view of the outdoor unit of the air conditioner. In this outdoor unit, as shown in the figure, a front member 13 formed by integrally molding a bell mouth 5 and a supporting member 11 with resin is provided on the front surface side (left side in the drawing) of the casing 1. The support member 11 is composed of a support rod 6 and a motor mounting portion 7, and a fan motor (driving motor) 4 for driving the blower fan 3 is mounted on the motor mounting portion 7. Further, in the motor mounting portion 7, by forming a recess in the mounting surface of the fan motor 4 (see FIG. 2), a ventilation portion 10 that allows the front and rear of the front member 13 to communicate with each other along the side surface of the fan motor 4.
Is provided. Further, the front member 13 has a rear end portion 5a of the bell mouth 5 which opens rearwardly, passes through the inside of the support rod 6, and reaches the ventilation passage 10.
Are formed. The air guide passage 9 is formed by hollow molding of a resin, and the front side portion of the air passage 10 is used as the blowout passage 10a, so that the front member 13 is formed.
It opens to the front. On the other hand, the drive motor 4 has
Although a three-bladed blower fan 3 is attached from the rear side, the bell mouth 5 is provided so as to surround the outer periphery of the blower fan 3 on the front side. When the blower fan 3 is driven by the action of the bell mouth 5, a wind passage from the back side to the front side is formed as shown by the arrow in the figure. In the figure, reference numeral 2 denotes an outdoor heat exchanger, which functions as a condenser or an evaporator in the refrigerant circuit and performs heat exchange between the drawn outside air and the circulating refrigerant. The lead wire lead-out portion of the fan motor 4 is provided on the motor mounting portion 7.
Further, from the front of the front member 13, the front grill 12
(See FIG. 4) is attached, but it is omitted in FIG. 1 in order to simplify the drawing and facilitate understanding.

FIG. 2 is a front view of the front member 13. The front member 13 is formed by integral molding of resin as described above, but the bell mouth 5 is provided around the outer peripheral side thereof, and four support rods 6 are radially provided from the bell mouth 5. It extends toward the center and supports the motor mount 7. Also these 4
As shown in FIG. 1, all the support rods 6 of the book extend in a plane (a plane parallel to the drawing) substantially orthogonal to the rotation axis of the fan motor 4, and between the adjacent support rods 6. Are formed so that the angles formed in the two are different from each other. For example, the angle A in the figure is 100 °, the angle B is 80 °, and the remaining two angles are about 90 ° different from these.

Further, although the support rod 6 is formed in the shape of a wing having a flat cross section, each position C, C ', shown in FIG.
The cross-sectional shape at C ″ is shown in FIG. 3. As shown in the figure, the cross-sectional shape of the support rod 6 is at each position C,
C ′ and C ″ have a blade shape, but their longitudinal directions are inclined by an angle D with respect to the rotational axis direction of the fan motor 4, and are substantially orthogonal to the blower blade surface. Further, the dimensions E, E ′, E ″ of the support rod 6 in the direction substantially orthogonal to the longitudinal direction are E> E ′> E ″ as shown in FIG. It is formed so that it becomes thicker at both end portions C and gradually becomes thinner and smoother toward the intermediate portion C ″. Also, the dimension F in the direction of the rotation axis
Are the same at any position C, C ′, C ″.

In the outdoor unit of the air conditioner, the front member 1
The fan motor is supported and fixed by the support member 11 provided on the No. 3. Therefore, the front grill 12 (see FIG. 4) is not required to have the rigidity for supporting the fan motor 4 as in the conventional example, and it is possible to achieve both reliable support of the blower fan 3 and improvement of the outdoor unit appearance. it can. Moreover, since the support member 11 is formed integrally with the bell mouth 5, the assembly accuracy between the bell mouth 5 and the blower fan 3 can be improved, and the clearance between the both 5 and 3 can be reduced. It is also possible to improve the quietness of the equipment and the air conditioning capacity. Further, since the fan motor 4 and the motor mounting portion 7 are arranged in front of the boss 3a of the blower fan 3, it is avoided that the ventilation resistance increases as in the conventional example.

The supporting member 11 is composed of the motor mounting portion 7 and the four supporting rods 6 extending radially from the bell mouth 5, and the angles formed between the supporting rods 6 are different from each other. Four support rods 6 are provided for the three-blade blower fan 3. Therefore, even if the blower fan 3 is rotated, the phases of the blades and the support rod 6 do not coincide with each other, so that the quietness can be improved. When the number of blades is different from the number of support rods 6, the number of support rods is larger than the number of blades so that the blower fan 4 can be reliably supported. Further, since all the support rods 6 are arranged on the same plane that is substantially orthogonal to the rotation axis of the fan motor 4, the support rigidity is increased and the blade size of the blower fan 4 can be increased.

The cross-sectional shape of the support rod 6 is a blade shape, and is provided so that its longitudinal direction is substantially orthogonal to the blower blade surface of the blower fan 4. Therefore, the blowing direction and the longitudinal direction of the blade shape are substantially coincident with each other, whereby the ventilation resistance can be reduced to further improve the quietness, and the blowing performance can be improved and energy can be saved. The cross-sectional dimension in the direction substantially orthogonal to the longitudinal direction is large at both end portions C,
Then, it is smoothly changed so as to gradually become thinner from both end portions C to the intermediate portion C ″. Therefore, sufficient supporting rigidity can be obtained while reducing ventilation resistance, and turbulent flow is generated in the blast airflow. Since there is no noise, good quietness can be maintained.

The support rod 6 has one end open at the rear end 5a of the bell mouth 5 on the suction side inside the casing 1 and the other end provided along the side surface of the fan motor 4 with an outlet passage. An air guide passage 9 that opens to the outlet side via 10a is provided. Therefore, when the blower fan 3 is driven, the air is forcibly fed toward the fan motor 4, whereby the fan motor 4 can be cooled. In addition, the cooling can be ensured by providing the ventilation portion 10 on the motor mounting portion 7 and allowing the air to flow therethrough. Moreover, since the air guide passage 9 is formed as a hollow layer by hollow molding, it does not affect the outer shape of the support rod 6, and therefore the good quietness obtained by the cross-sectional shape can be maintained.

Further, since the fan motor 4 can be surely cooled as described above, the outdoor unit also has the following advantages. First, the front member 13 can be formed using resin. Since the resin is inferior in thermal conductivity, it is not possible to sufficiently dissipate the heat generated by the fan motor 4, but in this outdoor unit, the air guide passage 9 and the ventilation portion 10 are provided.
As a result, a sufficient cooling effect can be obtained, so that the support member 11 and the like can be formed of resin. Therefore, the cost of the material itself can be reduced and
It can be easily manufactured. Further, in this outdoor unit, the blower fan 3 can be arranged upstream of the fan motor 4. In this case, the fan motor 4 is usually arranged downstream of the boss 3a of the blower fan 3, so that it cannot be cooled sufficiently. However, in this outdoor unit, a sufficient cooling effect is separately provided as described above. Therefore, such an arrangement can be made. Therefore, the blower fan 4 can be arranged on the back side of the front member 13, so that the device can be made compact and the ventilation resistance can be reduced.

Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications can be carried out within the scope of the present invention. For example, in the above outdoor unit, all the support rods 6 are arranged on the same plane, but as shown in FIG. 4, the motor mounting portion 7 side may be located rearward of the bell mouth 5 side. In this way, although the support rigidity is somewhat lowered, the degree of freedom in the shape of the front grille 12 is increased and the appearance can be further improved.
Further, the suction side opening of the air guide passage 9 may be provided on the outer side portion 5b of the bell mouth 5 as shown in FIG. By doing so, hollow molding can be made easier.

[0051]

In the outdoor unit for an air conditioner according to the first aspect of the present invention, the support member for the drive motor is fixed to the bell mouth, so that the appearance is improved and the blower fan is reliably supported. Is possible. Further, since the assembling precision between the bell mouth and the blower fan is improved, the clearance between the bellmouth and the blower fan can be reduced, and the quietness and the blowing performance can be improved.

Further, in the outdoor unit of the air conditioner according to claim 2,
It is possible to further improve the quietness and the blowing performance.

Further, in the outdoor unit for an air conditioner according to the third aspect, it is possible to avoid the phase matching between the blades and the support rods and improve the noise reduction.

In the outdoor unit of the air conditioner according to the fourth aspect, the blower fan can be reliably supported by obtaining sufficient support rigidity.

In the outdoor unit of the air conditioner according to the fifth aspect, it is possible to further improve the quietness.

In the outdoor unit for an air conditioner according to any one of claims 6 to 8, it is possible to reduce ventilation resistance to improve quietness and save energy.

In the outdoor unit of the air conditioner according to the ninth aspect, it becomes possible to reliably support the blower fan while maintaining good quietness and the like.

In the outdoor unit of the air conditioner according to the tenth aspect, it is possible to prevent turbulence from occurring and to improve the quietness.

In the outdoor unit of the air conditioner according to the eleventh aspect, it is possible to increase the support rigidity and use a larger blower fan.

In the outdoor unit of the air conditioner according to the twelfth to fifteenth aspects, it becomes possible to reliably cool the drive motor and prevent the malfunction of the equipment. Particularly, in the outdoor unit of the air conditioner according to the fourteenth aspect, it becomes possible to maintain good quietness and good blowing performance.

In the outdoor unit for an air conditioner according to the sixteenth aspect, the use of resin makes it possible to facilitate the implementation.

In the outdoor unit of the air conditioner according to the seventeenth aspect, it is possible to optimize the arrangement of the blower fan to make the device compact and reduce the ventilation resistance.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of an outdoor unit for an air conditioner of the present invention.

FIG. 2 is a front view of a front member provided in the outdoor unit.

FIG. 3 is a sectional view of a support rod.

FIG. 4 is a vertical cross-sectional view of another embodiment of the outdoor unit.

FIG. 5 is a vertical cross-sectional view of an outdoor unit of a conventional air conditioner.

[Explanation of symbols]

 3 Blower fan 4 Fan motor 5 Bell mouth 6 Support rod 7 Motor mounting part 9 Air guide path 10 Ventilation part 10a Blow-out path 11 Support member

Claims (17)

[Claims] 1. An outdoor unit for an air conditioner comprising a blower fan (3), a drive motor (4) for the blower fan (3), and a bell mouth (5) surrounding the outer periphery of the blower fan (3). In the outdoor unit of the air conditioner, the drive motor (4) is supported and fixed by a support member (11) fixed to the bell mouth (5). 2. The outdoor unit for an air conditioner according to claim 1, wherein the support member (11) is formed integrally with the bell mouth (5). 3. The support member (11) extends radially from the bell mouth (5) and a motor mounting portion (7) for fixing the drive motor (4), and the motor mounting portion (7). A plurality of support rods (6) for supporting
The outdoor unit for an air conditioner according to claim 1 or 2, wherein the number of the support rods (6) is different from the number of blades of the blower fan (3). 4. The outdoor unit for an air conditioner according to claim 3, wherein the number of the support rods (6) is larger than the number of blades of the blower fan (3). 5. The support rods (6) are provided so that the angles formed between the adjacent support rods (6) are different from each other. Air conditioner outdoor unit. 6. The support rod (6) has a flat cross section, and is provided so that the longitudinal direction of the cross section and the blowing direction of the blower fan (3) are substantially the same. An outdoor unit for an air conditioner according to any one of claims 3 to 5. 7. The outdoor part of an air conditioner according to claim 6, wherein the support rod (6) is provided so that its cross-section longitudinal direction is substantially orthogonal to the blower blade surface of the blower fan (3). Machine. 8. The outdoor unit for an air conditioner according to claim 6, wherein the support rod (6) has a blade-shaped cross section. 9. The support rod (6) is formed so that the dimension in the direction substantially orthogonal to the blowing direction of the blowing fan (3) is smaller at the intermediate portion than at the both end portions. The outdoor unit of the air conditioner according to any one of claims 6 to 8. 10. The outdoor unit for an air conditioner according to claim 9, wherein the support rod (6) is formed so that the dimension changes smoothly from the intermediate portion to both end portions. 11. The outdoor unit for an air conditioner according to claim 3, wherein all the support rods (6) are arranged on substantially the same plane. 12. The motor mounting part (7) is provided with a ventilation part (10) for circulating the air blown by the air blowing fan (3) around the drive motor (4).
An outdoor unit for an air conditioner according to claim 11. 13. An air guide passage (9) for guiding air on the suction side to the periphery of the drive motor (4) on the support rod (6).
The outdoor unit of the air conditioner according to any one of claims 3 to 12, further comprising: 14. The outdoor unit for an air conditioner according to claim 13, wherein the air guide passage (9) is formed by a hollow layer of the support rod (6). 15. The air passage (9) is provided with an outlet passage (10a) opening from the periphery of the drive motor (4) toward the downstream side, according to claim 13 or 14. Air conditioner outdoor unit. 16. The support member (11) according to claim 12, wherein the support member (11) is made of resin.
The outdoor unit of the air conditioner of any one of 5. 17. The outdoor unit for an air conditioner according to claim 12, wherein the blower fan (3) is arranged upstream of the drive motor (4).