JP6485635B2 - Suction grill and air conditioner using the same - Google Patents

Description

  The present invention relates to molding a suction grill of an air conditioner.

  In an air conditioner, a box-shaped casing body is embedded in a space formed between a ceiling slab and a ceiling panel. A rectangular decorative panel is attached to the lower surface of the casing main body (the surface facing the room). Usually, an air inlet is provided at the center of the casing, and an air outlet is provided around the air inlet. The casing body includes a turbo fan, a heat exchanger disposed so as to surround the outer periphery of the turbo fan, and a drain pan disposed below the heat exchanger (see, for example, Patent Document 1). ).

  A suction grille is detachably provided at the air suction port of the decorative panel. A grill portion including a large number of suction holes is provided in the central portion of the suction grill. The suction holes are arranged in a lattice shape, and indoor air is sucked into the casing body through these suction holes as the turbo fan operates. In order to remove dust contained in the air, a dust removal filter is provided on the back surface of the suction grille.

  This suction grill is generally manufactured by a so-called injection molding method in which a molten resin is injected into a mold at a high pressure and molded. The injection mold is provided with a gate for injecting molten resin into the molding cavity. In the case of a suction grill, as shown in FIG. 5, a lattice-like opening 10 serving as a suction hole is provided. A gate G is disposed therein, and a resin is injected from the gate G into a molding cavity (not shown) of the mold.

Japanese Patent No. 5641089

  However, since the size per suction hole is small, the diameter of the gate provided there must be reduced. Therefore, in order to spread the resin evenly in the molding cavity of the mold, the filling pressure is increased, but in this case, a flow mark is generated around the gate trace of the molded product, or a sink mark is formed in a portion where the resin does not spread. May occur, resulting in a poorly molded product.

  One way to solve this problem is to increase the number of gates G and inject resin with a lower filling pressure into the mold cavity of the mold from a plurality of locations. If the number is increased, the number of weld lines increases, and the number of burrs of the gate G remaining after molding increases, which is not preferable.

  As another method, if the gate G is positioned not on the suction hole (opening 10) but on the surface side of the suction grill, it is not necessary to increase the injection pressure. Gate surface remains on the surface, which is not preferable in appearance.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a suction grill that has less noticeable gate traces and good moldability, and an air conditioner equipped with the suction grill.

To solve the problems described above, the present invention provides a plate-like suction grille made of a resin injection molded article, the suction grille is closed grill unit suction hole is formed a number in the central portion, the suction hole Arranged in a lattice shape, the periphery of the grill part forms a quadrangle, and a plurality of decorative recesses each having a predetermined depth are formed at the four corners of the square on the surface side of the suction grille . The gate trace which injected the said resin is located in the bottom part of one said makeup | decoration recessed part among the said some makeup | decoration recessed parts arrange | positioned at a predetermined corner, It is characterized by the above-mentioned.

Also, the present invention also includes an air conditioner having the suction grille.

  According to the present invention, a gate grill is less noticeable, and the suction grill has a good moldability.

1 is an external perspective view of an air conditioner according to an embodiment of the present invention. The principal part sectional drawing of the said air conditioner. The front view of the state seen from the bottom face side of a suction grill. The partial expansion perspective view which expanded the corner part of the grill part of the said suction grill. Explanatory drawing which shows shaping | molding of the suction grille of a prior art example.

  Next, although an embodiment of the present invention will be described as an application of the present invention to an air conditioner with reference to the drawings, the present invention is not limited to this.

  As shown in FIGS. 1 and 2, the air conditioner 1 includes a rectangular parallelepiped casing body 2 housed in a space formed between a ceiling slab and a ceiling panel T, and a bottom surface B1 of the casing body 2. And a decorative panel 3 to be attached.

  The casing body 2 has a rectangular top plate 21 and four side plates 22 extending downward from each side of the top plate 21, and a box-shaped container whose bottom surface B1 (the bottom surface in FIG. 1) is open. It is a vessel. On the inner peripheral surface of the casing body 2, a heat insulating material 23 formed of foamed polystyrene is provided.

  At each corner of the casing body 2, there are a total of four suspension fittings 4, and the suspension fitting 4 is locked to a suspension bolt (not shown) suspended from the ceiling, so that the air conditioner 1 is suspended and fixed to the ceiling.

  As shown in FIG. 2, a turbo fan 24 as a blower is disposed almost at the center of the inside of the casing body 2, and a heat exchanger 25 surrounds the turbo fan 24 on the outer periphery of the turbo fan 24. For example, it is arranged in a square frame shape.

  A drain pan 6 is provided on the lower side of the heat exchanger 25 to receive the dew condensation water generated by the heat exchanger 25 during the cooling operation. In this embodiment, the drain pan 6 is made of styrene foam resin, and an air outlet passage for guiding the conditioned air having passed through the heat exchanger 25 to the air outlet 32 of the decorative panel 3 through the drain pan main body 61 having the dew receiving portion 66. 64. On the inner wall of the dew receiving portion 66 of the drain pan body 61, a hard resin drain sheet 62 that also serves as a reinforcing material is disposed.

  The drain pan 6 is formed in a square frame shape in plan view, and the inside of the square frame is an air suction passage 63 that communicates with the air suction port 31 of the decorative panel 3. A bell mouth 27 for guiding the air sucked from the air suction port 31 to the suction side of the turbo fan 24 is provided in the air suction passage 63. On the air inlet 31 side of the bell mouth 27, an electrical component box 28 is disposed.

  Referring to FIGS. 1 and 2 again, the decorative panel 3 is a rectangular frame and is screwed to the lower end of the hanging metal fitting 4. The decorative panel 3 has an air inlet 31 that is opened in a square shape at the center, and rectangular air outlets 32 are arranged at four locations around the air inlet 31 along the four sides of the air inlet 31. Each air outlet 32 is provided with a rotating wind direction plate 33. A suction grill 5 is detachably attached to the air suction port 31.

  Referring also to FIG. 3, the suction grill 5 is a resin injection-molded product formed by injection molding, and has a plate-like surface (surface facing the room: the lower surface in FIG. 2). It is a flat surface that is substantially coplanar along the bottom surface B2. A part of the suction grill 5 is provided with two lock release buttons 55 that are used when the suction grill 5 is removed.

  A dust removal filter 52 for removing dust contained in the air is provided on the back surface of the suction grill 5 (the surface facing the drain pan 6: the top surface in FIG. 2). In this embodiment, the dust filter 52 is a pleated filter obtained by folding a mesh filter into a wave shape.

  A central portion of the suction grill 5 has a grill portion 53 in which a number of suction holes 51 communicating with the air suction port 31 are formed. The suction holes 51 are arranged in a lattice pattern, so that the periphery of the grill portion 53 forms a quadrangle Q. The suction holes 51 are arranged in a lattice shape inclined by 45 ° with respect to each side of the quadrangle Q.

  As shown in the partially enlarged view of FIG. 3, in this embodiment, the suction hole 51 is provided with four types of suction holes 51a, 51b, 51c, 51d having different sizes. The size of the opening area of each suction hole 51a, 51b, 51c, 51d is 51a> 51b> 51c> 51d. In FIG. 4, the suction holes 51 are filled in for easy identification.

  In this embodiment, most of the grill part 51 is formed by the suction holes 51a, the suction holes 51b having a medium-sized opening area are arranged so as to surround the outer periphery of the suction holes 51a, and further, the outer periphery of the grill part 51 is surrounded. A small suction hole 51c having an opening area is disposed, and a suction hole 51d having the smallest opening area is disposed on the outermost periphery.

  That is, as the end of the grill 51 gradually decreases from the inside toward the outside, the suction hole 51a → the suction hole 51b → the suction hole 51c → the suction hole 51d, a geometric gradation pattern is formed toward the outside. .

  In the four corners Q1 to Q4 of the quadrangle Q around the grill part 53, adjacent to the grill part 53, a decorative recess having a predetermined depth for obtaining a regular appearance design together with the shape of the grill part 53, respectively. 54 is formed.

  The decorative recesses 54 are recesses formed one step lower than the surface of the suction grill 5, and in this example, three in one row are provided in each of the four corners Q1 to Q4, a total of twelve. The opening area of the decorative recess 54 is formed to be smaller than the opening area of the suction hole 51 d, thereby forming a gradation pattern together with the grill part 53.

  In one of the three decorative recesses 54 in each of the four corners Q1 to Q4 (the central decorative recess 54a in FIG. 3), a resin is injection-molded when the suction grill 5 is injection-molded. By positioning the gate (both not shown) to be injected into the molding cavity, the gate mark 56 remains on the inner wall 541 of the decorative recess 54. The gate is not positioned in the remaining two decorative recesses 54b.

  When the mold gate is positioned so as to inject the resin into the bottom 542 of the inner wall 541 of the decorative recess 54a, the gate trace 56 remains on the bottom surface of the decorative recess 54a. According to this, the gate trace 56 formed after the injection molding remains on the bottom portion 542 which is the inner wall 541 of the decorative recess 54a, so that it is not visually recognized by the user. Therefore, the gate trace 56 becomes inconspicuous without performing post-processing such as a process of removing the burr of the gate trace.

  Further, since the gate can be directly positioned on the bottom 542 of the decorative recess 54 on the surface of the suction grill 5 and the gate diameter can be increased in accordance with the decorative recess 54, the gate is not increased and the resin is injected into the mold. Even if the injection pressure is not increased, the moldability is improved, and the suction grill 5 is excellent in aesthetic appearance with no noticeable flow marks, welds or sink marks.

  In this embodiment, the decorative recesses 54 are disposed on the outer periphery of the grill portion 53 in consideration of the appearance design, but may be provided at any position on the surface of the grill portion 53. Moreover, by using such a grill part 53 for the air conditioner 1, it becomes the air conditioner 1 excellent in the aesthetics in which a flow mark, a weld, and a sink mark are not conspicuous. Further, the number and combination of the makeup recesses 54a where the gates constituting the makeup recesses 54 are positioned and the makeup recesses 54b where the gates are not positioned may be appropriately determined in accordance with the shape and size of the suction grill 5.

  As described above, according to the present invention, the gate diameter can be increased by positioning the gate for injecting the resin into the decorative recess 54 on the surface side of the suction grill 5. There is no need to increase the injection pressure for injecting the resin, and it is possible to mold the suction grill 5 having an excellent aesthetic appearance with no noticeable flow marks, welds or sink marks. Furthermore, since the gate trace 56 is positioned on the inner wall 541 of the decorative recess 54, the gate trace 56 is not noticeable without being visually recognized by the user and without performing post-processing such as a process of removing the burr of the gate trace 56. .

  Moreover, although the case where the suction grill 5 of this invention was used for the air conditioner 1 was demonstrated, not only this but the apparatus provided with the suction grill 5 on the surface of the housing | casing, for example, an air cleaner or a dehumidifier Used for etc.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Casing main body 21 Top plate 22 Side plate 23 Heat insulating material 24 Turbo fan 25 Heat exchanger 27 Bell mouth 28 Electrical component box 3 Cosmetic panel 31 Air inlet 32 Air outlet 33 Wind direction plate 4 Suspension bracket 5 Suction grill 51 Suction hole 52 Dust removal filter 53 Grill part 54 Makeup recess 54a Makeup recess (makeup recess where the gate is positioned)
54b Makeup recess (makeup recess without gate)
541 Inner wall 542 Bottom 56 Gate mark 6 Drain pan 61 Drain pan main body 62 Drain sheet 63 Air suction passage 64 Air blowing passage Q Square Q1-Q4 Corner

Claims (2)

In a plate-like suction grill made of resin injection-molded products,
Said suction grille is perforated grill portion suction hole is formed a number in the central portion, the periphery of the grill unit by the suction holes are arranged in a grid form a square, on the surface side of the suction grille A plurality of decorative recesses each having a predetermined depth are formed at each of the four corners of the quadrangle, and the bottom of one of the plurality of decorative recesses disposed at the predetermined corner of the square is the bottom of the decorative recess. A suction grill characterized in that a gate mark into which resin is injected is located. An air conditioner comprising the suction grill according to claim 1 .

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