JP2010117044A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit for an air conditioner equipped with a blowoff grille capable of suppressing a pressure loss to blowing wind while using a die with a simple and inexpensive structure in resin integral molding. <P>SOLUTION: In the outdoor unit 1 for the air conditioner, a blowoff port 5 for blowing blowoff wind from an axial fan 3 to the outside is provided on a front surface of a casing 2, and a blowoff grille 6 integrally formed of resin material is arranged in the blowoff port 5. A radial lattice 9 composing the blowoff grille 6 has a cross section having an oblong shape along a blowoff direction of the blowoff wind. As an upstream side 9A and a downstream side 9B in the blowoff direction are displaced to the rotational direction, this radial lattice 9 with the oblong cross section is formed to have a shape following a swirl flow of the blowoff wind as a whole, when it is seen from the front surface of the unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outdoor unit for an air conditioner in which a blowout grill serving as a fan guard is provided at a blowout opening.

  The outdoor unit for an air conditioner has a casing that is partitioned into a heat exchanger room and a machine room. An outdoor heat exchanger, an axial fan (generally a propeller fan), etc. are installed on the heat exchanger room side. In addition to being disposed, a compressor, a four-way valve, a control box, and the like are disposed on the machine room side. In addition, the front surface of the casing on the heat exchanger chamber side is provided with a blowout port for blowing the air circulated to the outdoor heat exchanger through the axial fan, and a finger or the like is inserted into the blowout port. A blow-out grill that also serves as a fan guard is provided to prevent this.

  Conventionally, grills having various configurations have been proposed as blowout grills. One of them is a resin blowout grill in which the entire grill is integrally formed of a resin material. In the blow grill having such a configuration, in order to reduce the ventilation resistance, the cross section of the grid constituting the grill is formed in a vertically long shape along the blow direction, and further, against the swirling flow of the blow wind blown from the axial fan. To prevent resistance, the radial grid with a vertically long cross section is tilted along the swirling flow of the blown wind when viewed from the front of the unit, or both ends of the horizontal bars of the grill grid are opposite to the rotation direction. (For example, refer to Patent Document 1).

JP 2007-163036 A

  However, as described above, the radial grid whose cross section is vertically long along the blowing direction and the horizontal beam of the grid are inclined so as to follow the swirling flow of the blowing air from the axial fan or with respect to the rotation direction. In the blow grill made of resin integral molding having both ends inclined in the opposite direction, the structure of the mold used for molding the grill becomes very complicated. In other words, by tilting the grids and crosspieces, the mold mating surface (parting line) and cavity depth must be set to different heights and depths alternately between the upper and lower molds, etc. May be complicated and expensive, or it may be necessary to use a mold having a slide structure. For this reason, there existed a problem of bringing about the fall of productivity of a blow grill, a cost rise, or the fall of the maintainability of a shaping die.

  The present invention has been made in view of such circumstances, and includes a blow-off grill that can reduce the pressure loss against blow-off air and can make the structure of a mold used during resin integral molding simple and inexpensive. An object is to provide an outdoor unit for an air conditioner.

In order to solve the above problems, the outdoor unit for an air conditioner of the present invention employs the following means.
That is, the outdoor unit for an air conditioner according to the present invention is provided with a blow-out port that blows out the blown air from the axial fan on the front surface of the casing in which the outdoor heat exchanger and the axial fan are accommodated. In the outdoor unit for an air conditioner in which a blow grill integrally formed of a resin material is disposed at the blow outlet, the radial lattice constituting the blow grill has a longitudinally long section along the blow direction of the blow wind When viewed from the front of the unit, the radial grid having a vertically long cross section is shifted in the rotational direction from the upstream side and the downstream side of the unit, and is configured to follow the swirling flow of the blowing wind as a whole. It is characterized by being.

  According to the present invention, the radial grid constituting the blow-out grill has a cross-sectional shape that is vertically long along the blow-out direction of the blow-out wind, and the radial grid having a cross-sectionally long cross-section is viewed from the front of the unit in the blow-out direction. Since the upstream side and the downstream side are shifted in the rotational direction, and the overall shape is along the swirl flow of the blown air, the swirl flow of the blown air blown from the axial fan is upstream and downstream in the blow direction. Are shifted in the rotational direction, and are blown out along the cross section of the radial lattice which is shaped along the swirling flow of the blowing wind as a whole. Accordingly, the resistance of the radial grid to the swirling flow of the blown air can be reduced, and the pressure loss due to the blow grill can be suppressed. Therefore, the power of the axial fan can be reduced, the fan efficiency can be increased, and The noise caused by can be reduced. Further, it is not necessary to incline the radial grid to reduce the pressure loss, and the mold when the blow-out grill is integrally formed of the resin material can be a simple upper and lower split mold. Therefore, productivity and cost reduction of the blow grill with the resin-integrated structure can be achieved, and mold maintenance can be improved.

  Furthermore, the outdoor unit for an air conditioner according to the present invention is the outdoor unit for an air conditioner described above, wherein the radial lattice has an upstream side and a downstream side at a substantially intermediate position in a blowing direction length of a vertically long section. It is divided into two, and it has a shape shifted in the rotation direction from each other.

  According to the present invention, the radial grid is divided into an upstream side and a downstream side at a substantially intermediate position of the length in the blow-out direction of the cross-section that is a vertically long shape, and has a shape that is shifted in the rotational direction. It is possible to mold the blow grill with a mold that is divided into two at the middle position of the vertically long dimension along the blow direction of the radial grid. Therefore, the mating surface and cavity depth of the molding die can be simplified, and the die structure can be simplified and the cost can be reduced.

  Furthermore, the outdoor unit for an air conditioner according to the present invention is the outdoor unit for an air conditioner according to any one of the above-described air conditioners, wherein the blowout grill is gradually formed with a claw portion at an upper portion and an upper surface at a lower portion from a tip toward a root side. A projecting portion having a tapered surface, the claw portion being hooked in an engagement hole drilled in the casing side, and the projecting portion in an engagement hole drilled in the casing side The lower part is configured to be screwed and fixed to the casing in the inserted state.

  According to the present invention, the blow-out grill is provided with a projection having a claw portion at the upper portion and a lower portion with a tapered surface whose upper surface gradually increases from the tip toward the root side, and the claw portion is formed on the casing side. Since the lower part is fixed to the casing with the protruding part inserted into the engaging hole formed on the casing side, the claw part is After hooking into the engagement hole, by inserting the protrusion into the engagement hole, the blowing grille is mounted so that there is no play due to clearance between the upper and lower engagement holes on the casing side due to the wedge effect of the tapered surface, The lower part can be fixed with screws. Therefore, it is possible to firmly fix the blowout grill so that chattering due to the blowout wind does not occur by screwing only the lower portion.

  Furthermore, the outdoor unit for an air conditioner according to the present invention is the outdoor unit for an air conditioner described above, wherein the claw portion and the protrusion are paired with two upper portions and two lower portions of the blow grill. It is the characteristic provided on the diagonal between.

  According to the present invention, since the claw portion and the protrusion portion are provided on the diagonal line between the upper portion and two lower portions of the blow grill as a pair, the blow grill is provided with casings at four locations. By the claw part and the screw on the side, it can be firmly fixed so as not to be loose. Therefore, it is possible to firmly fix the blow grill so that chatter or the like due to the blow wind does not occur.

  According to the present invention, the swirling flow of the blown air blown out from the axial fan is a radial lattice in which the upstream side and the downstream side in the blowing direction are shifted in the rotational direction, and the shape of the swirling flow of the blown air is as a whole. Therefore, the resistance of the radial grid to the swirling flow of the blown air can be reduced, and the pressure loss due to the blow grill can be suppressed. Therefore, the power of the axial fan can be reduced, the fan efficiency can be increased, and the noise caused by the blown air can be reduced. Further, it is not necessary to incline the radial grid to reduce the pressure loss, and the mold when integrally molded with the resin material can be a simple upper and lower split mold, and therefore the blow grill with the resin integral molding structure. Productivity and cost reduction, and mold maintenance can be improved.

Embodiments according to the present invention will be described below with reference to the drawings.
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a perspective view of an outdoor unit for an air conditioner according to an embodiment of the present invention, FIG. 2 shows a front view of its blow grill, and FIG. 3 shows a in FIG. A cross-sectional equivalent view along -a is shown. An air conditioner outdoor unit (outdoor unit) 1 includes a horizontally long rectangular casing 2. As is known, the inside of the casing 2 is partitioned into a heat exchanger chamber and a machine chamber by a partition plate (not shown). On the heat exchanger chamber side, an axial flow fan 3 including an outdoor heat exchanger (not shown) that exchanges heat between the outside air and the refrigerant, a propeller fan that circulates the outside air to the outdoor heat exchanger, and the like is arranged. It is installed. On the machine room side, a compressor (not shown) for compressing the refrigerant, a four-way switching valve for switching the circulation direction of the refrigerant, a control box for controlling the outdoor unit 1, and the like are disposed.

  The front surface 4 on the heat exchanger chamber side of the casing 2 is provided with a blowout port 5 for blowing outside air that has passed through the outdoor heat exchanger so as to face the axial fan 3. A blow-out grill 6 also serving as a fan guard is disposed so that fingers and the like are not inserted. The blow-out grill 6 is integrally formed of a resin material, and as shown in FIG.

  The blow-out grill 6 includes a circular hub portion 7 disposed at the center, a leaf-shaped outer frame portion 8 having a size covering the outer periphery of the blow-out port 5, and a space between the circular hub portion 7 and the outer frame portion 8. A plurality of radially arranged radial grids 9 to be connected and a plurality of concentric annular rings 10 for connecting the plurality of radial gratings 9 are formed. A large number of concentric annular rings 10 are arranged at intervals such that fingers or the like are not inserted, and have a function of a fan guard.

  As shown in FIG. 4, the blowout grill 6 is provided with claw portions 11 that are fitted and hooked into engagement holes (not shown) drilled on the casing 2 side, as shown in FIG. 4. As shown in FIG. 5, it is inserted into engagement holes (not shown) drilled on the casing 2 side at the two corners in the lower part that form a diagonal with the two claw parts 11. And a screw hole 13 for fixing a screw. Further, the upper surface of the protruding portion 12, that is, the surface facing the claw portion 11 is a tapered surface 12 </ b> A so that the height gradually increases from the tip side toward the root side. As a result, the blow-out grill 6 has two diagonal upper and lower claw portions 11 and projections 12 inserted into the engagement holes on the casing 2 side, and the lower two portions with screws 14 (see FIG. 1). It is set as the structure which can be fixed to the casing 2 by screwing.

  Further, the radial lattice 9 and the circular ring 10 constituting the blowing grill 6 reduce resistance against blowing air blown from the inner side of the casing 2 to the outer side through the axial fan 3, so that FIG. As shown in FIG. 3, the cross section is formed in a vertically long shape along the blowing direction of the blowing air. Furthermore, when the outdoor unit 1 is viewed from the front, the radial grid 9 having a vertically long cross section can reduce resistance to the swirling flow of the blown air blown from the axial fan 3 when viewed from the front. As shown in FIG. 7, the upstream side 9A and the downstream side 9B in the blowing direction in the cross section are shifted in the rotational direction, and the overall shape follows the swirling flow of the blowing wind. That is, it is configured to be inclined in a direction along the swirling flow of the blown air in a pseudo manner.

  The upstream side 9A and the downstream side 9B of the radial grid 9 are sectioned at a substantially middle position in the length of the blow-out direction of the cross section formed into a vertically long shape, and each has a die cutting gradient during molding toward the end side. Is provided. By adopting such a configuration, the mating surface of the mold when the blow-out grill 6 is integrally formed of a resin material, that is, the parting line P / L has a longitudinally long cross section of the radial lattice 9 and the circular ring 10. It can be provided at an intermediate position of the length in the blowing direction (see FIG. 6), and the molding die can be made into a die having a simple split structure in the upper and lower surfaces and the cavity depth. Become.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The outdoor unit 1 sucks outside air from the back and left side surfaces by the axial flow fan 3 being driven to rotate, heat is exchanged between the outside air and the refrigerant by an outdoor heat exchanger, and then the outside air is provided on the front side. It acts so that it blows out from the blower outlet 5 which exists. The blowing air blown out in the axial direction from the axial fan 3 is blown out through the blowing grill 6 also serving as a fan guard.

  Thus, since the blowing grill 6 through which the blowing air from the axial fan 3 is circulated is subjected to the wind pressure by the blowing air, it is necessary to firmly fix the casing 2 so as not to cause rattling or chatter. Further, it is desirable that the blowout grill 6 can reduce the pressure loss caused by the blowout grill 6 to the blown wind as much as possible. This reduces the power of the axial fan 3 to increase the fan efficiency and reduce the noise caused by the blown wind. It is valid.

  Thus, according to the present embodiment, the claw portions 11 and the projections 12 provided so as to be paired respectively at two upper and lower corners of the blowing grill 6 are provided on the casing 2 side. The blow-out grill 6 is fixed to the casing 2 side at four locations by fitting into the holes and screwing the two portions at the lower portion with screws 14 (see FIG. 1). Moreover, since the upper surface of the protrusion 12 is a tapered surface 12A that gradually increases from the tip toward the root side, the protrusion 12 is inserted into the engagement hole after the claw part 11 is hooked in the engagement hole. Due to the wedge effect of the tapered surface 12A, the blowing grill 6 can be mounted so that there is no play due to clearance between the upper and lower engaging holes on the casing 2 side, and can be firmly fixed with screws. Accordingly, the blow grill 6 can be firmly fixed by screwing only the lower portion so that chatter or rattle due to the blow wind does not occur.

  Further, since the radial lattice 9 and the annular ring 10 constituting the blow grill 6 have a vertically long cross section along the blow direction of the blow wind, the resistance to the blow wind can be reduced. it can.

  Further, the blown air blown out in the axial direction from the axial fan 3 contains a swirl component in the rotational direction, and it is possible to prevent the blowout grill 6 from resisting the swirl flow. It is effective in reducing the pressure loss in In the present embodiment, in order to reduce the resistance to the swirling flow, the radial grid 9 whose section is vertically long along the blowing direction of the blowing air is viewed from the front of the unit without being inclined in the direction along the swirling flow. In this case, the upstream side 9A and the downstream side 9B in the blowing direction are configured to be shifted in the rotational direction, so that the overall shape follows the swirling flow of the blowing wind.

  For this reason, the swirling flow of the blown air blown out from the axial fan 3 has a radial shape in which the upstream side 9A and the downstream side 9B in the blowing direction are shifted in the rotational direction, and the entire shape follows the swirling flow of the blown air. The air is blown out along the cross section of the lattice 9, whereby the resistance of the radial lattice 9 against the swirling flow of the blown air can be reduced, and the pressure loss due to the blowout grill 6 can be suppressed. Therefore, the power of the axial flow fan 3 can be reduced, the fan efficiency can be increased, and the noise caused by the blowing air can be reduced.

  Further, it is not necessary to incline the radial grid 3 in the direction along the swirl flow in order to reduce the pressure loss. For this reason, the molding die for integrally molding the blowout grill 6 with a resin material is a simple upper and lower split structure gold. It can be made into a mold. As a result, productivity and cost reduction of the blow grill 6 having a resin-integrated structure can be achieved, and the mold maintenance can be improved.

  In particular, the radial grid 9 is divided into an upstream side 9A and a downstream side 9B at a substantially intermediate position in the blow-out direction length of the longitudinally shaped cross section, and has a shape shifted from each other in the rotational direction, and the upstream side 9A and the downstream side The side grille 6 is formed with a die having a structure divided into two at an intermediate position of the vertically long shape along the blowing direction of the radial lattice 9 by providing the side 9B with a die draft angle toward the end side. It becomes possible to do. Therefore, the mating surface and cavity depth of the molding die can be simplified, and the die structure can be simplified and the cost can be reduced.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the blow grill 6 has been described as an example having an outer shape that looks like a leaf as a whole, but the present invention is limited to the blow grill 6 having such an outer shape. It goes without saying that it is not.

  The present invention can also be applied to the outdoor unit 1 in which a part of the front panel constituting the casing 2 and the blow-out grill 6 are integrated. Furthermore, in the above-described embodiment, an example has been described in which the radial grid 9 extends straight in the radial direction, but the radial grid 9 may be configured to be curved in the rotation direction of the fan.

It is a perspective view of the outdoor unit for air conditioners which concerns on one Embodiment of this invention. It is a front view of the blowing grill of the outdoor unit for air conditioners shown in FIG. It is a cross-sectional equivalent view in alignment with aa of the blowing grill shown in FIG. It is an enlarged view of the A section of the blowing grill shown in FIG. It is an enlarged view of the B section of the blowing grill shown in FIG. It is a partial expansion perspective view of the blowing grill shown in FIG. It is an expanded sectional view which follows bb of the radial grating | lattice of the blowing grill shown in FIG.

Explanation of symbols

1 Air conditioner outdoor unit (outdoor unit)
2 Casing 3 Axial fan 4 Front face of casing 5 Outlet 6 Outlet grill 9 Radial grid 9A Upstream side 9B Downstream side 11 Claw part 12 Projection part 12A Tapered surface 13 Screw hole 14 Screw

Claims (4)

A blow grill provided on the front surface of the casing in which the outdoor heat exchanger and the axial fan are accommodated is provided with a blow outlet for blowing the blow air from the axial fan to the outside, and the blow grill is integrally formed with a resin material at the blow outlet. In the outdoor unit for an air conditioner in which
The radial grille constituting the blowout grill has a cross-sectional shape that is vertically long along the blowout direction of the blowout air, and the radial lattice having a cross-sectionally long cross section when viewed from the front of the unit is upstream and downstream in the blowout direction. The outdoor unit for an air conditioner, wherein the outdoor unit is shifted in the rotation direction and has a shape along the swirling flow of the blowing air as a whole.   The radial grid is divided into an upstream side and a downstream side at a substantially intermediate position in a blowing direction length of a vertically long cross section, and has a shape shifted from each other in the rotational direction. The outdoor unit for an air conditioner according to 1.   The blow-out grill includes a projection having a claw at the upper portion and a projection at the lower portion having a tapered surface whose upper surface gradually increases from the tip toward the base, and the claw is formed on the casing side. The lower portion is fixed to the casing with a screw in a state in which the protrusion is fitted into an engagement hole formed on the casing side while being hooked in the joint hole. The outdoor unit for an air conditioner according to claim 1 or 2. 4. The air conditioner according to claim 3, wherein the claw portion and the protrusion portion are provided on a diagonal line between two upper portions and two lower portions of the blow grill as a pair. Outdoor unit.

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