JP4033216B2 - Protective cover and air conditioner equipped with the same - Google Patents

Description

  The present invention relates to a protective cover and an air conditioner including the protective cover.

2. Description of the Related Art Conventionally, a protective cover that covers an air inlet provided in a casing of a ceiling-embedded air conditioner is known. This protective cover is for preventing a finger of an operator who performs maintenance of the air conditioner from touching the fan in the casing. In the device of Patent Document 1, the protective cover has a grid-like mesh portion.
JP 2000-111087 A

  By the way, when the mesh size of the mesh portion is small, it is possible to surely prevent the finger of an operator or the like from touching the fan, but the ventilation resistance is increased, and accordingly, the ventilation noise is increased. On the other hand, if the mesh size is large, the ventilation resistance is small, but there is a possibility that the finger of an operator or the like may touch the fan.

  Accordingly, the present inventors have developed a protective cover that has low ventilation resistance and reliably prevents the finger of an operator or the like from touching the fan.

  The present invention has been made in view of such points, and the object of the present invention is to ensure that the ventilation resistance is small and that a finger of an operator who performs maintenance of the air conditioner touches the fan in the air conditioner. It is an object of the present invention to provide a protective cover for preventing air and an air conditioner equipped with the same.

1st invention is a protective cover which covers the air inlet provided in the air conditioner , Comprising: It is provided with the some annular member arrange | positioned concentrically and on the same plane, between adjacent annular members Is characterized in that a plurality of radial members extending radially and linearly are respectively installed, and the interval between adjacent annular members is larger than the interval between adjacent radial members between both annular members. It is.

  As a result, the interval between the adjacent annular members is larger than the interval between the adjacent radial members between the two annular members, so the radial lengths of the meshes surrounded by the annular member and the radial members are compared. And the circumferential length thereof becomes relatively short. Thus, since the radial length of the mesh is relatively long, the ventilation resistance is reduced, and accordingly, the ventilation noise is reduced. Moreover, since the circumferential length of the mesh is relatively short, it is possible to prevent a finger of an operator who performs maintenance of the air conditioner from passing through the mesh. Therefore, it is possible to reliably prevent a finger of an operator or the like from touching the fan in the air conditioner.

  As a result, it is possible to reliably prevent the finger of an operator from touching the fan in the air conditioner while reducing the ventilation resistance.

  A second invention is characterized in that, in the first invention, the intervals between the adjacent radial members are substantially the same between the adjacent annular members.

  Thereby, since each interval of the radial members adjacent to each other between the adjacent annular members is substantially the same, compared to the case where the intervals of the adjacent radial members are different between the adjacent annular members, It is possible to further prevent fingers of workers performing maintenance of the air conditioner from passing through the mesh. Therefore, it can prevent more reliably that fingers, such as an operator, touch the fan in an air conditioner.

  According to a third aspect of the present invention, in the second aspect of the invention, the plurality of annular members include at least first, second, and third annular members disposed in order from the radially inner side toward the outer side. And the number of radial members between the third annular members is larger than the number of radial members between the first and second annular members.

  By the way, since the circumferential length of the first, second, and third annular members becomes longer in this order, the number of radial members between the second and third annular members is set to the number of radial members between the first and second annular members. When the number is equal to or less than the number, the distance between the adjacent radial members between the second and third annular members is larger than the distance between the adjacent radial members between the first and second annular members. In this case, a finger of an operator who performs maintenance of the air conditioner may touch the fan in the air conditioner through the mesh between the second and third annular members.

  Here, according to the present invention, since the number of radial members between the second and third annular members is greater than the number of radial members between the first and second annular members, the second and third annular members are between. The intervals between adjacent radial members can be substantially the same as the intervals between adjacent radial members between the first and second annular members. Therefore, it is possible to prevent a finger of an operator who performs maintenance of the air conditioner from passing through the mesh between the second and third annular members. Therefore, it is possible to more reliably prevent a finger of an operator or the like from touching the fan in the air conditioner.

  A fourth invention is characterized in that, in any one of the first to third inventions, an air circulation direction length of the annular member is shorter than an air circulation direction length of the radial member. .

  Thereby, since the length of the annular member in the air circulation direction is shorter than the length of the radial member in the air circulation direction, the length of the annular member in the air circulation direction becomes relatively short. Therefore, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

  A fifth invention is characterized in that, in any one of the first to fourth inventions, a cross-sectional shape of the radial member is substantially an airfoil.

  Thereby, since the cross-sectional shape of the radial member is substantially an airfoil, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

  A sixth invention is characterized in that in any one of the first to fifth inventions, resin molding is performed.

  Thereby, since the protective cover was resin-molded, the cost can be reduced as compared with the case of molding with a metal.

  A seventh aspect of the invention is an air conditioner provided with an air suction port, wherein the air conditioner includes any one of the first to sixth aspects of the invention that covers the air suction port. .

  In an eighth aspect based on the seventh aspect, a bell mouth is further provided, and the protective cover is detachably fixed to the bell mouth.

  Thereby, since the protective cover is detachably fixed to the bell mouth, the convenience of the air conditioner can be improved.

  According to a ninth invention, in the seventh invention, a bell mouth is further provided, and the protective cover is formed integrally with the bell mouth.

  Thereby, since the protective cover is shape | molded integrally with the bell mouth, cost can be reduced compared with the case where it is not shape | molded integrally.

  According to the present invention, since the interval between the adjacent annular members is larger than the interval between the adjacent radial members between the two annular members, the radial length of the mesh surrounded by the annular member and the radial member is increased. Becomes relatively long, and its circumferential length becomes relatively short. Therefore, it is possible to reliably prevent the finger of an operator from touching the fan in the air conditioner while reducing the ventilation resistance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view of an indoor unit, FIG. 2 is a perspective view showing a part of a casing as viewed from below, FIG. 3 is a plan view of a protective cover, and FIG. FIG. 5 is a cross-sectional view of the annular member, and FIG. 5 is a cross-sectional view of the radial member.

  As shown in FIG. 1, the indoor unit (corresponding to an air conditioner) (1) according to the present embodiment is a ceiling-embedded type that is embedded in the indoor ceiling. The indoor unit (1) includes a substantially rectangular parallelepiped casing (10) embedded in the upper side of the ceiling (F), and a substantially square decorative panel (30) mounted on the bottom surface of the casing (10). I have.

  A substantially circular air inlet (11) is provided at the center of the bottom of the casing (10). Around the air inlet (11) at the bottom of the casing (10), four substantially rectangular air outlets (12) are formed so as to surround the air inlet (11). A fan (14) is disposed in an air passage (13) connecting the air inlet (11) and the air outlet (12) in the casing (10). A bell mouth (16) is disposed under the fan (14) (suction side) in the casing (10). This bell mouth (16) is resin-molded.

  A heat exchanger (17) is disposed around the fan (14) in the casing (10) so as to surround the fan (14). This heat exchanger (17) is of a cross fin coil type, for example. The heat exchanger (17) is formed in a substantially square shape in plan view. A drain pan (18) is disposed below the heat exchanger (17) in the casing (10) so as to correspond to the heat exchanger (17). The drain pan (18) is for collecting drain water (D) from the heat exchanger (17). The drain pan (18) has a substantially square shape in a plan view and a substantially U-shaped cross section. A drain pump (19) is disposed in the drain pan (18). The drain pump (19) is for discharging drain water (D) accumulated in the drain pan (18).

  A substantially square air inlet (31) is formed in the center of the decorative panel (30) so as to correspond to the air inlet (11) of the casing (10). Around the air inlet (31) of the decorative panel (30), four substantially rectangular air outlets (32) are formed so as to surround the air inlet (31). These air outlets (32) are arranged so as to correspond to the respective air outlets (12) of the casing (10).

  As shown in FIGS. 1 and 2, a protective cover (50) is screwed to the bell mouth (16) so as to cover the air suction port (11). The protective cover (50) is a net-like member for preventing a finger of an operator who performs maintenance of the indoor unit (1) from touching the fan (14) in the casing (10). The protective cover (50) is resin-molded.

As shown in FIG. 3, the protective cover (50) includes a central member (51) and a plurality of annular members (52) arranged concentrically and on the same plane with the central member (51) as the center. It has. In the present embodiment, first to sixth annular members (52a to 52f) are arranged in order from the radially inner side to the outer side as the plurality of annular members (52). Each annular member (52) is rod-shaped and has a substantially circular cross-sectional shape (see FIG. 4). The intervals of the third and fourth annular members (52c, 52d), the fourth and fifth annular members (52d, 52e), and the fifth and sixth annular members (52e, 52f) are substantially the same. The interval between the second and third annular members (52b, 52c) is larger than the interval between the third and fourth annular members (52c, 52d). The distance between the central member (51), the first annular member (52a), and the first and second annular members (52a, 52b) is substantially the same, and the third and fourth annular members (52c, 52d) Less than the interval. The sixth annular member (52f) is partly formed in a linear shape, and the other part is formed in a stepped shape that is recessed radially inward. Four fixing plates (54) are attached and fixed to the sixth annular member (52f) so as to extend radially outward. These fixing plates (54) are each formed with a substantially circular screw insertion hole (54a).

  A plurality of radial members (53) extending radially and linearly are spanned between adjacent central members (51) and annular members (52), and between adjacent annular members (52, 52). ing. Each radial member (53) is rod-shaped, and its cross-sectional shape is substantially circular (see FIG. 5). The length of each radial member (53) in the air flow direction (the length in the vertical direction; the length in the direction passing through the paper surface of FIG. 3) is substantially the same as the length of each annular member (52) in the air flow direction.

  The interval between the adjacent annular members (52, 52) is larger than the interval between the adjacent radial members (53, 53) between the two annular members (52, 52), and the adjacent annular members (52, 52). 52) The intervals between the adjacent radial members (53, 53) are substantially the same. For this reason, the radial direction length of the mesh | network (55) enclosed by the annular member (52) and the radial member (53) becomes comparatively long, and the circumferential direction length becomes comparatively short. As a result, the mesh (55) has a substantially rectangular shape. In this embodiment, each space | interval of the adjacent radial members (53, 53) is 10 mm or less. Thus, if each space | interval of the adjacent radial members (53, 53) shall be 10 mm or less, a standard human finger will not pass the mesh | network (55) of a protective cover (50).

  The number of radial members (53) between the second and third annular members (52b, 52c) is greater than the number of radial members (53) between the first and second annular members (52a, 52b). And between the second and third annular members (52b, 52c), between the third and fourth annular members (52c, 52d), between the fourth and fifth annular members (52d, 52e), and fifth and sixth. The number of radial members (53) between the annular members (52e, 52f) increases in this order. That is, the number of radial members (53) between the adjacent annular members (52, 52) gradually increases from the radially inner side to the outer side. The number of radial members (53) between the first and second annular members (52a, 52b) is greater than the number of radial members (53) between the central member (51) and the first annular member (52a). . In the present embodiment, the center member (51) and the first annular member (52a), the first and second annular members (52a, 52b), the second and third annular members (52b, 52c), the third And the number of radial members (53) between the fourth annular members (52c, 52d), between the fourth and fifth annular members (52d, 52e), and between the fifth and sixth annular members (52e, 52f), respectively. 10, 20, 40, 60, 80, and 99. These numbers are between the first and second annular members (52a, 52b), between the second and third annular members (52b, 52c), between the third and fourth annular members (52c, 52d), fourth and The intervals between the radial members (53) adjacent to each other between the fifth annular members (52d, 52e) and between the fifth and sixth annular members (52e, 52f) are determined to be substantially the same.

  Hereinafter, the process of screwing and fixing the protective cover (50) to the bell mouth (16) will be described with reference to FIGS. That is, the male screw 56 is fitted into the screw hole (not shown) of the bell mouth (16) and tightened while being inserted into the screw insertion hole (54a) of each fixing plate (54) of the protective cover (50). Thereby, the protective cover (50) is screwed and fixed to the bell mouth (16).

  Here, the air that flows into the casing (10) from the air suction ports (31, 11) flows at a substantially right angle with respect to the protective cover (50) without turning.

-Effect-
As described above, according to the present embodiment, the interval between the adjacent annular members (52, 52) is larger than the interval between the adjacent radial members (53, 53) between the both annular members (52, 52). Since the size is increased, the radial length of the mesh (55) surrounded by the annular member (52) and the radial member (53) is relatively long, and the circumferential length thereof is relatively short. As described above, since the radial length of the mesh (55) is relatively long, the ventilation resistance is reduced, and accordingly, the ventilation noise is reduced. Moreover, since the circumferential direction length of the mesh (55) is relatively short, it is possible to prevent a finger of an operator who performs maintenance of the indoor unit (1) from passing through the mesh (55). Therefore, it is possible to reliably prevent a finger of an operator or the like from touching the fan (14) in the indoor unit (1).

  As a result, it is possible to reliably prevent a finger of an operator from touching the fan (14) in the indoor unit (1) while reducing the ventilation resistance.

  Further, since the intervals between the adjacent radial members (53, 53) are made substantially the same between the adjacent annular members (52, 52), the adjacent radial members (52, 52) are adjacent to each other. Compared with the case where the intervals of the members (53, 53) are made different, it is possible to further prevent the finger of an operator who performs maintenance of the indoor unit (1) from passing through the mesh (55). Therefore, it can prevent more reliably that fingers, such as an operator, touch the fan (14) in an indoor unit (1).

  By the way, since the circumferential direction length of the first, second and third annular members (52a, 52b, 52c) becomes longer in this order, the radial member (53) between the second and third annular members (52b, 52c). Is equal to or less than the number of radial members (53) between the first and second annular members (52a, 52b), the second and third annular members (52b, 52c) are adjacent to each other. The intervals between the radial members (53, 53) are larger than the intervals between the adjacent radial members (53, 53) between the first and second annular members (52a, 52b). In this case, a finger of an operator who performs maintenance of the indoor unit (1) passes through the mesh (55) between the second and third annular members (52b, 52c), and the fan (14) in the indoor unit (1). There is a risk of touching.

  Here, according to this embodiment, the number of the radial members (53) between the second and third annular members (52b, 52c) is set to the radial member (53) between the first and second annular members (52a, 52b). ), The distance between the adjacent radial members (53, 53) between the second and third annular members (52b, 52c) is between the first and second annular members (52a, 52b). The distance between adjacent radial members (53, 53) can be substantially the same. Therefore, it is possible to prevent a finger of an operator who performs maintenance of the indoor unit (1) from passing through the mesh (55) between the second and third annular members (52b, 52c). Therefore, it can prevent more reliably that fingers, such as an operator, touch the fan (14) in an indoor unit (1).

  Moreover, since the protective cover (50) is resin-molded, the cost can be reduced compared to the case of molding with a metal.

  Moreover, since the protective cover (50) is screwed and fixed to the bell mouth (16), that is, detachably fixed, the convenience of the indoor unit (1) can be improved.

(Other embodiments)
In addition, in the said embodiment, although the protective cover (50) which covers the air inlet (11) provided in the casing (10) of the indoor unit (1) was demonstrated, not only this but the protective cover (50) An air inlet provided in an air conditioner other than the indoor unit (1) may be covered.

  Moreover, in the said embodiment, although the 1st-6th annular member (52a-52f) is arrange | positioned as said some annular member (52), 2-5 or 7 or more annular members (52) are arranged. May be installed.

  Moreover, in the said embodiment, although the above-mentioned number of radial members (53) are constructed between the adjacent annular members (52, 52), respectively, the adjacent annular members (52, 52) As long as the distance is larger than the distance between the adjacent radial members (53) between the annular members (52, 52), the number of radial members (53) between the adjacent annular members (52, 52) is Any value of 2 or more may be used.

  Moreover, in the said embodiment, although the air distribution direction length of each annular member (52) is made substantially the same as the air distribution direction length of each radial member (53), the air distribution direction length of each annular member (52). The length may be shorter than the length of each radial member (53) in the air flow direction. In this case, since the length of each annular member (52) in the air circulation direction is shorter than the length of each radial member (53) in the air circulation direction, the length of each annular member (52) in the air circulation direction becomes relatively short. . Therefore, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

  Moreover, in the said embodiment, although the cross-sectional shape of each radial member (53) is made into substantially circular shape, as shown in FIG. 6, the cross-sectional shape of each radial member (53) is made into substantially wing shape. good. In this case, since the cross-sectional shape of each radial member (53) is substantially an airfoil, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

  Moreover, in the said embodiment, although the protective cover (50) is shape | molded with resin, you may shape | mold with materials other than this, for example, a metal.

  In the above embodiment, the protective cover (50) is screwed and fixed to the bell mouth (16). However, the protective cover (50) is detachably fixed to the bell mouth (16) by means other than screwing. You may do it.

  Moreover, in the said embodiment, although the protective cover (50) is screwed and fixed to the bell mouth (16), you may resin-mold the protective cover (50) integrally with the bell mouth (16). In this case, since the protective cover (50) is formed integrally with the bell mouth (16), the cost can be reduced as compared with the case where it is not formed integrally.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the protective cover according to the present invention and the air conditioner equipped with the protective cover allow the finger of an operator who performs maintenance of the air conditioner to touch the fan in the air conditioner while reducing the ventilation resistance. It can also be applied to uses for reliably preventing the above.

It is sectional drawing of the indoor unit which concerns on embodiment of this invention. It is a perspective view which shows a mode that a part of casing was seen from the lower side. It is a top view of a protective cover. It is a cross-sectional view of an annular member. It is a cross-sectional view of a radial member. It is a cross-sectional view of a radial member.

Explanation of symbols

(1) Indoor unit (air conditioner)
(10) Casing (11) Air inlet (14) Fan (16) Bell mouth (30) Decorative panel (50) Protective cover (51) Center member (52) Ring member (53) Radial member (54) Fixing plate ( 55) Mesh (F) Ceiling (D) Drain water

Claims (9)

A protective cover for covering the air inlet (11) provided in the air conditioner (1),
A plurality of annular members (52) arranged concentrically and on the same plane;
A plurality of radial members (53) extending radially and linearly are installed between the adjacent annular members (52, 52), respectively.
A protective cover characterized in that an interval between adjacent annular members (52, 52) is larger than an interval between adjacent radial members (53, 53) between both annular members (52, 52). The protective cover according to claim 1,
The protective cover characterized in that the intervals between the adjacent radial members (53, 53) between the adjacent annular members (52, 52) are substantially the same. The protective cover according to claim 2,
The plurality of annular members (52) include at least first, second and third annular members (52a, 52b, 52c) disposed in order from the radially inner side to the outer side,
The number of radial members (53) between the second and third annular members (52b, 52c) is greater than the number of radial members (53) between the first and second annular members (52a, 52b). Features protective cover. In the protective cover as described in any one of Claims 1-3,
The protective cover characterized in that the length of the annular member (52) in the air flow direction is shorter than the length of the radial member (53) in the air flow direction. In the protective cover as described in any one of Claims 1-4,
A protective cover, wherein the radial member (53) has a substantially airfoil cross-sectional shape. In the protective cover as described in any one of Claims 1-5,
A protective cover characterized by being molded with resin. An air conditioner provided with an air inlet (11),
The air conditioner provided with the protective cover (50) as described in any one of Claims 1-6 which covers the said air inlet (11). The air conditioner according to claim 7,
It further includes bellmouth (16),
The air conditioner characterized in that the protective cover (50) is detachably fixed to the bell mouth (16). The air conditioner according to claim 7,
It further includes bellmouth (16),
The air conditioner characterized in that the protective cover (50) is formed integrally with the bell mouth (16).

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