JP2010127595A - Outdoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner having an inexpensive bell mouth of high rigidity without increasing pressure loss of a fan. <P>SOLUTION: A number of reinforcement ribs 53 to improve the rigidity of a fan ring 51 are disposed on an outer periphery of the fan ring 51 in the circumferential direction of the fan ring, and a reinforcement flange 521 to improve the rigidity of a skirt 52 is disposed on a peripheral edge of the skirt 52 to suppress the deformation and strain of part of the fan ring 51 and the skirt 52 due to thermal shrinkage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outdoor unit of an air conditioner that is provided with a heat exchanger along an air inlet and has a fan at an air outlet, and more specifically, the shape of a bell mouth that regulates and stabilizes the flow of air and Regarding placement.

  Large air conditioner outdoor units installed in buildings, commercial facilities, etc. contain large heat exchanger units in the housing to increase the efficiency of the refrigeration cycle. An air suction port is disposed on the upper surface, and an air outlet and a fan are used on the upper surface.

  This type of heat exchanger is disposed in the casing in a U-shape when viewed from above, and three of the four side surfaces of the outdoor unit are opened as air suction ports. . In general, a fan is provided with a bell mouth that regulates and stabilizes the air flow.

  As shown in Patent Document 1, the bell mouth is provided with a fan ring arranged so as to surround the outer periphery of the fan, and the fan is arranged coaxially at the center of the fan ring. According to this, by providing the bell mouth, it is possible to arrange the flow of air heat-exchanged in the housing and efficiently exhaust it to the outside.

  A conventional bell mouth is formed in a so-called trumpet shape in which the center of the fan ring in the axial direction is closest to the outer diameter of the fan and the inner diameter of the fan ring gradually increases from the center toward both ends. According to this, pressure loss in the fan can be reduced, and exhaust can be efficiently performed.

  However, this type of bell mouth has the following problems in manufacturing. That is, in the conventional bell mouth, the fan ring is formed in a trumpet shape that gradually increases the opening from the center toward both sides, so that when the bell mouth is molded in the mold, the molded product is taken out along the axial direction. I can't. Therefore, the mold is complicated and the cost is high.

  In order to solve this problem, the outer diameter of the bell mouth is kept constant, the inner diameter side is formed in a trumpet shape, and the outer diameter is simply a cylindrical shape. The open end is easily distorted or deformed due to thermal shrinkage that occurs when it is taken out of the mold. For these reasons, the outside diameter of the bellmouth was increased to increase the rigidity.

JP 2004-156828 A

  Therefore, the present invention has been made to solve the above-described problems, and the object of the present invention is to provide an air conditioner equipped with a bell mouth that is less expensive and has high rigidity without increasing the pressure loss of the fan. It is to provide an outdoor unit.

  In order to achieve the above-described object, the present invention has several features described below. The invention according to claim 1 includes a housing provided with a heat exchanger along the air inlet and having a fan at the air outlet, and a bell mouth is attached to the rotating shaft of the fan on the outer periphery of the fan. In the outdoor unit of an air conditioner provided coaxially, the bell mouth is formed integrally with a fan ring disposed coaxially on the outer periphery of the fan and one end of the fan ring on the air suction side. , A skirt larger than the fan ring, and on the outer periphery of the fan ring, a large number of ribs parallel to the axis of the fan ring are provided along the circumferential direction of the fan ring, The skirt is provided with a reinforcing flange.

  According to a second aspect of the present invention, in the first aspect, the fan ring is formed in a cylindrical shape having a substantially constant thickness between an inner diameter and an outer diameter, and the fan ring is formed on the air blowing side. It is characterized in that a taper is formed which gradually increases as the opening of the head increases toward the tip.

  According to the first aspect of the present invention, by providing a large number of ribs on the outer periphery of the fan ring along the circumferential direction of the fan ring and further providing a flange on the skirt, the fan ring is subjected to the heat shrinkage stress immediately after molding. Can be prevented from being distorted or deformed.

  According to the invention described in claim 2, the opening on the air blowing side of the cylindrical fan ring having a substantially constant thickness is formed so as to gradually increase toward the tip, thereby preventing the tip of the fan ring from being deformed. However, it is possible to reduce the pressure loss while suppressing the mold cost of the bell mouth.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention, FIG. 2 is a plan view of the outdoor unit, and FIG. 3 is a cross-sectional view taken along line AA of FIG.

  4 is a perspective view of the bell mouth in a state where a fan is incorporated, and FIG. 5 is a plan view of FIG. 6A is a front view of the bell mouth, and FIG. 6B is a cross-sectional view taken along the line BB in FIG. FIG. 7 is an enlarged cross-sectional view of the bell mouth fan ring.

  FIG. 8 is an enlarged cross-sectional view of a main part of the air guide opening of the bell mouth, and FIG. 9 is a schematic diagram showing an example of a fixing method of the bell mouth. FIGS. 10A and 10B are schematic views schematically showing the bell mouth arrangement method of the present invention. 11A and 11B are related diagrams related to the outdoor unit of the air conditioner of the present invention.

  As shown in FIG. 1, the outdoor unit 1 of this air conditioner has a large and vertically long casing 10, and an air suction port 11 for taking in air is provided on a side surface of the casing 10. Is provided. Inside the housing 10, the heat exchanger unit 2 is disposed along the air suction port 11. In this embodiment, the longitudinal direction is the width direction of the casing 10 (left and right direction in FIG. 2), and the short direction is the depth direction of the casing 10 (vertical direction in FIG. 2).

  In this example, the heat exchanger unit 2 is formed by assembling a heat exchanger formed in a U-shape when viewed from above in two upper and lower stages, and is arranged along the inner peripheral surface of the horizontally long casing 10. Has been. In the present invention, the configuration of the heat exchanger unit 2 may be arbitrary, and the shape and configuration thereof may be arbitrarily selected according to specifications.

  Of the four side surfaces of the housing 10, air suction ports 11 are formed at three locations, and the remaining one side surface has an access panel 4 that is opened and closed when the inside of the housing 10 is maintained. , 4 are provided. By removing the access panels 4 and 4, a refrigeration cycle unit, an electrical component box (both not shown) and the like in the housing 10 appear.

  In the present invention, specific configurations such as a refrigeration cycle unit and an electrical component box are arbitrary, and those configurations can be freely configured according to specifications if used as a refrigeration cycle for an air conditioner.

  An air outlet 12 for exhausting the air in the casing 10 is disposed at the upper part of the casing 10, and the air outlet 12 is provided with a fan 3 and a protective cover 13 for protecting the fan 3. . Thereby, the air sucked from the air inlet 11 and heat-exchanged by the heat exchanger 2 is exhausted from the air outlet 12 at the upper part of the housing via the fan 3.

  3 to 5, the fan 3 is a radial fan (axial fan) in which four fan blades 31 are attached in the radial direction of the fan motor 32, and the air in the housing 10 is contained in the housing. It is formed so as to blow out to the outside of the body 10. In the present invention, if the fan 3 is a radial fan, its specific specification may be arbitrary.

  Around the fan 3, a bell mouth 5 for adjusting the air flow generated by the fan 3 is provided coaxially with the rotation axis of the fan 3. The bell mouth 5 is a synthetic resin molded product, and integrally includes a cylindrical fan ring 51 disposed on the outer peripheral side of the fan 3 and a skirt 52 formed at the lower end of the fan ring 51.

  As shown in FIGS. 6A and 6B, the fan ring 51 is formed in a cylindrical shape whose axial height (the vertical direction in FIG. 4) is higher than the axial height of the fan 3. . The outer diameter of the fan ring 51 is substantially constant along the axial direction, and the inner diameter 511 is formed to be slightly larger than the outer diameter of the fan 3.

  As shown in FIG. 7, the thickness T of the fan ring 51 is substantially uniform along the axial direction, but a tapered surface 512 is formed such that the tip side is inclined toward the outer diameter side by ΔA ° with respect to the inner diameter 511. Has been. The tip of the fan ring 51 is further formed on an arcuate surface 513 to prevent wind noise and vibration. The inclination and curvature of the tapered surface 512 and the circular arc surface 513 may be arbitrarily selected according to specifications.

  According to this, since the outer diameter of the fan ring 51 is a straight shape, it can be easily extracted in the axial direction from the mold. Furthermore, by forming the opening of the fan ring 51 so as to gradually increase toward the tip, it is possible to prevent the opening of the fan ring 51 from being distorted or deformed due to thermal contraction during molding.

  A large number of reinforcing ribs 53 are provided on the outer periphery of the fan ring 51 at predetermined intervals along the circumferential direction. The reinforcing ribs 53 are plate-like ribs formed substantially perpendicularly from the base of the fan ring 51 toward the tip. In this example, the 30 reinforcing ribs 53 are centered on the rotation axis at a predetermined interval. They are arranged symmetrically.

  According to this, by providing the reinforcing rib 53 on the outer periphery of the fan ring 51, not only can the rigidity of the entire fan ring 51 be improved and vibration can be reduced, but also the reinforcing rib 53 can become an anchor during molding. It can be prevented from being distorted or deformed by heat shrinkage during molding. Further, since the reinforcing ribs 53 are provided in parallel along the axial direction, the reinforcing ribs 53 are also parallel along the mold drawing direction, so that they can be easily removed from the mold.

  The skirt 52 has a trapezoidal cross section, and the lower end side of the fan ring 51 is integrally formed on the upper surface side thereof. As shown in FIG. 5, the skirt 52 is formed in a square shape including the fan ring 51 as viewed from above.

  The lower end of the skirt 52 is open, and a reinforcing flange 521 is formed at the opening edge. In this example, the reinforcing flange 521 protrudes from the lower end of the skirt 52 by about 2 mm toward the outer peripheral direction.

  By providing the reinforcing flange 521, not only the lower end of the skirt 52 is reinforced to suppress vibrations, but also the peripheral edge of the skirt 52 is thickened by the reinforcing flange 521 to become an anchor, which cooperates with the reinforcing rib 53 described above. It is possible to prevent the resin from being deformed or distorted by heat shrinkage during molding.

  As shown in FIGS. 4 and 6B, at least one of the two sets of side surfaces 5A and 5B facing each other of the skirt 52 has an air guide opening 54 that ensures air flow. , 54 are formed. Since the air guide openings 54 and 54 have the same shape, either one will be described.

  In the wind guide opening 54, the lower ends of the side surfaces 5A and 5A in the longitudinal direction (left and right direction in FIG. 5) of the skirt 52 are along the direction of the fan ring 51 and the width direction (left and right direction in FIG. 6B). It is open in an arch shape.

  In this example, the air guide opening 54 is provided on the side surfaces 5A and 5A in the longitudinal direction of the skirt 52. More preferably, the air guide opening portion 54 is provided at a position facing the side surface of the horizontally long casing 10 facing the longitudinal direction. It is preferable that

  According to this, as shown in FIG. 3, when the moving distance of air from the air suction portions 11, 11 provided on the side surfaces 5 </ b> A, 5 </ b> A facing the longitudinal direction of the housing 10 to the bell mouth 5 is long. Also, since the air guide openings 54 and 54 are provided at the lower end of the skirt 52, the air flow from the air suction port 11 to the bell mouth 5 is not hindered, and turbulence and vibration can be suppressed.

  As shown in FIG. 8, the air guide opening 54 has a peripheral edge 541 that is curved with a predetermined curvature and protrudes to the anti-suction side (right side in FIG. 8). According to this, by curving the periphery of the air guide opening 54 in an R shape, the strength can be further increased, and the edge of the air guide opening 54 can be suppressed from being vibrated by air.

  When attaching the bell mouth 5 to the housing 10, as shown in FIG. 9, a skirt is formed in a support groove 152 formed by an L-shaped locking piece 151 provided inside the side panel 15 of the housing 10. Push in the lower edge of 52.

  Thereby, a part of the skirt 52 is elastically deformed and is elastically supported between the locking pieces 151. After that, the skirt 52 and the locking piece 151 are fixed via the screw 522 to be fixed to the housing 10.

  In this example, the bell mouth 5 is supported by the side panel 15 of the housing 10, but may be supported by a frame, a top plate, or the like, and the mounting of the bell mouth 5 to the housing 10 depends on the specification. May be arbitrarily selected.

  As shown in FIG. 10A, the case where it is installed in a horizontally long case 10 has been illustrated, but the bell mouth 10 of the present invention is either one of a pair of side surfaces of the case 10 facing each other. The side length W and the side length W of the bell mouth 5 facing the side surface are made common so that the mounting dimensions are the same.

  According to this, as shown in FIG. 10B, the length W between the side surfaces 5B and 5B of the small casing 10a close to a regular quadrangle when viewed from above is the same, so that the side surface 5B, If the length W between 5B is common, it can also apply to the same bellmouth 5 to all the housing | casings 10, and can suppress cost more.

  In this embodiment, the outdoor unit 1 is an outdoor unit for a large air conditioner for business use in which an air suction port 11 is disposed on a side surface of the housing 10 and an air outlet 12 is disposed on an upper surface of the housing 10. Although demonstrated to the example, the bellmouth 5 of this invention may be applied to the air conditioner of the type by which the air suction inlet 11 and the air blower outlet 12 are arrange | positioned at a side surface. Furthermore, the present invention may be applied to an air conditioner in which an outdoor unit and an indoor unit are integrated. If the outdoor unit is used as a bell mouth of a radial fan, other aspects are also included in the present invention.

  As described above, according to the present invention, the fan ring 51 of the bell mouth 5 has a straight cylindrical shape along the axial direction, and the reinforcing rib 53 parallel to the axial direction is provided on the outer circumferential surface thereof. Since the reinforcing flange 521 is provided on the peripheral edge of the skirt 52, there is no part that becomes an obstacle along the mold drawing direction (axial direction), so that the molded product can be smoothly extracted from the mold.

The perspective view of the outdoor unit of the air conditioner which concerns on one Embodiment of this invention. The top view of the outdoor unit. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. The perspective view of the bellmouth of the state which incorporated the fan. The top view of FIG. (A) Front view of bellmouth, (b) BB sectional view of FIG. The expanded sectional view of the fan ring of bellmouth. The principal part expanded sectional view of the wind guide opening part of a bellmouth. The schematic diagram showing an example of the fixing method of a bell mouth. (A), (b) is the schematic diagram which showed typically the arrangement | positioning method of the bellmouth of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 10 Housing | casing 11 Air inlet 12 Air blower 2 Heat exchanger 3 Fan 4 Access panel 5 Bell mouth 51 Fan ring 512 Tapered surface 513 Arc surface 52 Skirt 521 Reinforcement flange 53 Reinforcement rib 54 Wind guide opening 541 Curve Part

Claims (2)

An air conditioner in which a heat exchanger is provided along the air inlet and includes a housing having a fan at the air outlet, and a bell mouth is coaxially provided on the rotating shaft of the fan on the outer periphery of the fan In the outdoor unit of the machine,
The bell mouth includes a fan ring that is coaxially disposed on an outer periphery of the fan, and a skirt that is integrally formed at one end on the air suction side of the fan ring and that is larger than the fan ring. A large number of ribs parallel to the fan ring axis are provided on the outer periphery of the ring along the circumferential direction of the fan ring, and the skirt is provided with a flange. Harmonic outdoor unit.   The fan ring is formed in a cylindrical shape with a substantially constant wall thickness between the inner diameter and the outer diameter, and the fan ring is formed with a taper that gradually increases as the opening on the air blowing side approaches the tip. The outdoor unit for an air conditioner according to claim 1, wherein the outdoor unit is an air conditioner.

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