WO2007088786A1

WO2007088786A1 - Protective cover and air conditioner with the same

Info

Publication number: WO2007088786A1
Application number: PCT/JP2007/051261
Authority: WO
Inventors: Tsunehisa Sanagi; Naoyuki Ohta
Original assignee: Daikin Industries, Ltd.
Priority date: 2006-02-01
Filing date: 2007-01-26
Publication date: 2007-08-09
Also published as: CN101371081B; JP4033216B2; CN101371081A; JP2007205631A

Abstract

A protective cover (50) comprises a plurality of annular members (52) disposed coaxially with each other. A plurality of radial members (53) extending in the radial direction are so installed as to span the adjacent annular members (52, 52). The intervals between the adjacent annular members (52, 52) are larger than those between the adjacent radial members (53, 53) positioned between these annular members (52, 52).

Description

Specification

Protective cover and air conditioner equipped with the same

Technical field

[0001] The present invention relates to a protective cover and an air conditioner including the same.

Background art

Conventionally, a protective cover that covers an air suction port provided in a casing of a ceiling-embedded air conditioner is known. This protective cover is intended to prevent the fingers of workers who perform maintenance of the air conditioner from touching the fan in the casing. In Patent Document 1, the protective cover has a grid-like mesh portion.

Patent Document 1: Japanese Patent Laid-Open No. 2000-111087

Disclosure of the invention

Problems to be solved by the invention

[0003] By the way, when the mesh size of the mesh portion is small, it is possible to reliably prevent the finger of an operator or the like from touching the fan, but the ventilation resistance increases, and accordingly, the ventilation noise increases. . On the other hand, if the mesh size is large, the draft resistance becomes small, but there is a risk that the finger of an operator or the like may touch the fan.

[0004] In view of this, the present inventors have developed a protective cover that reliably prevents a finger of an operator or the like with low ventilation resistance from touching the fan.

[0005] The present invention has been made in view of the strong point, and the object of the present invention is to make a finger of an operator or the like who performs maintenance of an air conditioner having a small ventilation resistance a fan in the air conditioner. We will provide a protective cover that reliably prevents touching the screen and an air conditioner equipped with the protective cover.

Means for solving the problem

[0006] A first invention is a protective cover for covering an air inlet provided in an air conditioner, comprising a plurality of annular members arranged concentrically, and between adjacent annular members. Is characterized in that a plurality of radially extending radial members are respectively installed, and the interval between adjacent annular members is greater than the interval between adjacent radial members between the annular members. The

[0007] Thereby, the interval between the adjacent annular members is made larger than the interval between the adjacent radial members between the two annular members, so that the radial direction of the mesh surrounded by the annular member and the radial members is increased. The length is relatively long and the circumferential length is relatively short. Thus, since the radial direction 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 fingers of workers who perform maintenance of the air conditioner from passing through the mesh. Therefore, it is possible to reliably prevent the finger of an operator from touching the fan in the air conditioner.

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

[0009] 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.

[0010] Thereby, the intervals between the adjacent radial members are made substantially the same between the adjacent annular members, so that the intervals between the adjacent radial members are different between the adjacent annular members. Thus, it is possible to further prevent the fingers of workers who perform maintenance of the air conditioner from passing through the mesh. For this reason, it is possible to more reliably prevent the finger of an operator or the like from touching the fan in the air conditioner.

[0011] A third invention includes the first, second and third annular members disposed in order from the radially inner side to the outer side as the plurality of annular members in the second invention, 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.

[0012] By the way, since the circumferential lengths of the first, second, and third annular members increase in this order, the number of radial members between the second and third annular members is set between the first and second annular members. The number of radial members adjacent to each other between the second and third annular members is less than the distance between adjacent radial members between the first and second annular members. Also grows. In this case, there is a risk that 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.

[0013] Here, according to the present invention, the number of radial members between the second and third annular members is set to the first and The number of radial members adjacent to each other between the second and third annular members is larger than the number of radial members adjacent to each other between the first and second annular members. It can be substantially the same as the interval. Therefore, it is possible to prevent fingers such as workers performing 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 the finger of an operator or the like from touching the fan in the air conditioner.

[0014] 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. To do.

[0015] Thereby, since the length of the annular member in the air flow direction is shorter than the length of the radial member in the air flow direction, the length of the annular member in the air flow direction becomes relatively short. For this reason, the ventilation resistance becomes smaller, and the ventilation noise is further reduced accordingly.

[0016] 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.

[0017] 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.

[0018] The sixth invention is characterized in that, in any one of the first to fifth inventions, a resin molding is performed.

[0019] Thereby, since the protective cover is molded with resin, the cost can be reduced compared with the case where the protective cover is molded with metal.

[0020] A seventh invention is an air conditioner provided with an air suction port, and includes any one of the first to sixth inventions covering the air suction port. Is.

[0021] An eighth invention is characterized in that, in the seventh invention, a bell mouth is further provided, and the protective cover is detachably fixed to the bell mouth.

[0022] Thereby, since the protective cover is detachably fixed to the bell mouth, the convenience of the air conditioner can be improved.

[0023] A ninth invention is characterized in that, in the seventh invention, a bell mouth is further provided, and the protective cover is formed integrally with the bell mouth.

[0024] Thereby, since the protective cover is formed integrally with the bell mouth, it is formed integrally. Compared to the case where there is no cost, the cost can be reduced.

The invention's effect

[0025] According to the present invention, the interval between adjacent annular members is larger than the interval between adjacent radial members between the two annular members, so that the annular members and the radial members are surrounded. The radial length of the mesh is relatively long, and the circumferential length is 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.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of an indoor unit according to an embodiment of the present invention.

[FIG. 2] FIG. 2 is a perspective view showing a part of the casing as viewed from its lower side force.

FIG. 3 is a plan view of the protective cover.

FIG. 4 is a cross-sectional view of the annular member.

FIG. 5 is a cross-sectional view of a radial member.

FIG. 6 is a cross-sectional view of the radial member.

Explanation of symbols

[0027] (1) Indoor unit (air conditioner)

(10) Casing

(11) Air inlet

(14) Fan

(16) Benole Mouse

(30) Makeup panel

(50) Protective cover

(51) Central member

(52) Ring member

(53) Radial member

(54) Fixed plate

(55) Mesh

(F) Ceiling (D) Drain water

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0029] Fig. 1 is a cross-sectional view of the indoor unit, Fig. 2 is a perspective view showing a part of the casing as viewed from below, and Fig. 3 is a plan view of the protective cover. 4 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, an indoor unit (corresponding to an air conditioner) (1) according to this embodiment is a ceiling-embedded type that is embedded in a ceiling of an indoor room. The indoor unit (1) includes a substantially rectangular parallelepiped casing (10) embedded on the upper side of the ceiling (F) and a substantially square decorative panel (30) mounted on the bottom surface of the casing (10). Get ready!

[0031] 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 the 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 molded with grease

[0032] Around the fan (14) in the casing (10), a heat exchanger (17) is disposed so as to surround the fan (14). This heat exchange ^ (17) is, for example, a cross fin coil type. The heat exchange ^^ (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). This 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). This drainage pump (19) is for discharging drain water (D) accumulated in the drain pan (18).

[0033] A substantially square air inlet (31) is formed at the center of the decorative panel (30) so as to correspond to the air inlet (11) of the casing (10). Air suction of decorative panel (30) Around the mouth (31), 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 and fixed 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 molded with resin.

As shown in FIG. 3, the protective cover (50) includes a central member (51) and a plurality of annular members (52) arranged concentrically around the central member (51). I have. In the present embodiment, the first to sixth annular members (52a to 52f) are arranged in order as the plurality of annular members (52) toward the outside in the radial direction. Each annular member (52) is rod-shaped, and its cross-sectional shape is substantially circular (see FIG. 4). The intervals between 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 distance between the second and third annular members (52b, 52c) is larger than the distance between the third and fourth annular members (52c, 52d). The distance between the central member (51) and 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) Is smaller than the interval. The sixth annular member (52f) is partly formed in a straight line shape, and the other part is formed in a stepped shape that is recessed radially inward. Four fixed 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 threaded hole (54a).

[0036] A plurality of radially extending radial members (53) are spanned between adjacent central members (51) and annular members (52), and between adjacent annular members (52, 52). Yes. Each radial member (53) is rod-shaped and has a substantially circular cross-sectional shape (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.

[0037] The interval between adjacent annular members (52, 52) is larger than the interval between adjacent radial members (53, 53) between the annular members (52, 52). Neighboring between (52, 52) The intervals between the radial members (53, 53) that meet each other are substantially the same. For this reason, 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 a result, the mesh (55) has a substantially rectangular shape. In the present embodiment, the intervals between the adjacent radial members (53, 53) are 10 mm or less. Thus, when the distance between adjacent radial members (53, 53) is 10 mm or less, a standard human finger does not pass through the mesh (55) of the protective cover (50).

[0038] The number of radial members (53) between the second and third annular members (52b, 52c) is larger than the number of radial members (53) between the first and second annular members (52a, 52b). Many. The second and third annular members (52b, 52c), the third and fourth annular members (52c, 52d), the fourth and fifth annular members (52d, 52e), and the fifth and sixth The number of radial members (53) between the annular members (52e, 52f) increases in this order. That is, the number of the radial members (53) between the adjacent annular members (52, 52) gradually increases as the radial inner force goes outward. The number of radial members (53) between the first and second annular members (52a, 52b) is larger than the number of radial members (53) between the central member (51) and the first annular member (52a). Many. In this embodiment, between the central member (51) and the first annular member (52a), between the first and second annular members (52a, 52b), between the second and third annular members (52b, 52c), Number of radial members (53) between the third and fourth annular members (52c, 52d), between the fourth and fifth annular members (52d, 52e), and between the fifth and sixth annular members (52e, 52f) Are 10, 20, 40, 60, 80, and 99, respectively. 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), the fourth and The distances 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 fixing the protective cover (50) to the bell mouth (16) with screws will be described with reference to FIG. 1 and FIG. That is, the male screw 56 is inserted into the screw hole (54a) of each fixing plate (54) of the protective cover (50) and fitted into the screw hole (not shown) of the bell mouth (16) and tightened. As a result, the protective cover (50) is fixed to the bell mouth (16) with screws.

[0040] Here, the air inlet (31, 11) force The air flowing into the casing (10) swirls It flows almost perpendicularly to the protective cover (50).

[0041] effect

As described above, according to the present embodiment, the interval between the adjacent annular members (52, 52) is greater than the interval between the adjacent radial members (53, 53) between the 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 length of the mesh (55) in the radial direction is relatively long, the ventilation resistance is reduced, and accordingly, the ventilation noise is reduced. In addition, since the circumferential 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 the finger of an operator or the like from touching the fan (14) in the indoor unit (1).

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

[0043] Further, since the intervals between the adjacent radial members (53, 53) are made substantially the same between the adjacent annular members (52, 52), there is no phase difference between the adjacent annular members (52, 52). Compared with the case where the intervals between the adjacent radial 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 is possible to more reliably prevent a finger of an operator or the like from touching the fan (14) in the indoor unit (1).

[0044] By the way, since the circumferential lengths of the first, second and third annular members (52a, 52b, 52c) become longer in this order, the radial member between the second and third annular members (52b, 52c). If the number of (53) 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) Thus, the intervals between the adjacent 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 the present embodiment, the radial member between the second and third annular members (52b, 52c)

Since the number of (53) is larger than the number of radial members (53) between the first and second annular members (52a, 52b), they are adjacent to each other between the second and third annular members (52b, 52c). Radial member (53, 53) These intervals may be substantially the same as the intervals between the adjacent radial members (53, 53) between the first and second annular members (52a, 52b). 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 is possible to more reliably prevent the finger of an operator from touching the fan (14) in the indoor unit (1).

[0046] Further, since the protective cover (50) is molded with resin, the cost can be reduced compared to the case of molding with a metal.

[0047] Further, 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. .

[0048] (Other Embodiments)

In the above embodiment, the force described for the protective cover (50) covering the air inlet (11) provided in the casing (10) of the indoor unit (1) is not limited to this, and the protective cover (50) It may cover the air inlet provided in the air conditioner other than the indoor unit (1).

[0049] In the above embodiment, the first to sixth annular members (52a to 52f) are arranged as the plurality of annular members (52), but 2 to 5 or 7 or more annular members are provided. (52) may be arranged!

[0050] In the above-described embodiment, the above-mentioned number of radiating members (53) are respectively installed between adjacent annular members (52, 52). As long as the distance between the two annular members (52, 52) is larger than the distance between the adjacent radial members (53), the radial members between the adjacent annular members (52, 52) The number of (53) may be any value of 2 or more.

[0051] In the above-described embodiment, the length of each annular member (52) in the air flow direction is substantially the same as the length of each radial member (53) in the air flow direction! ) In the air flow direction may be shorter than the air flow direction length of each radial member (53). In this case, since the length of each annular member (52) in the air flow direction is shorter than the length of each radial member (53) in the air flow direction, the length of each annular member (52) in the air flow direction becomes relatively short. . Therefore, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

[0052] In the above embodiment, each radial member (53) has a substantially circular cross-sectional shape. 1S As shown in FIG. 6, the cross-sectional shape of each radial member (53) may be substantially airfoil. In this case, since the cross-sectional shape of each radial member (53) is substantially airfoil, the ventilation resistance is further reduced, and accordingly, the ventilation noise is further reduced.

[0053] In the above-described embodiment, the protective cover (50) is formed of a resin, but may be formed of a material other than this, for example, a metal.

[0054] In the above embodiment, the protective cover (50) is screwed and fixed to the bell mouth (16), but the protective cover (50) is attached to and detached from the bell mouth (16) by means other than screwing. It may be fixed as possible.

[0055] In the above embodiment, the protective cover (50) is fixed to the bell mouth (16) with screws, but the protective cover (50) may be integrally molded with the bell mouth (16). good. 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.

[0056] 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 scope of 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.

Industrial applicability

[0058] As described above, the protective cover according to the present invention and the air conditioner including the protective cover are such that a finger of an operator who performs maintenance of the air conditioner is reduced in ventilation resistance while the ventilation resistance is reduced. Useful for applications that reliably prevent touching

Claims

The scope of the claims

[1] A protective cover for covering the air inlet (11) provided in the air conditioner (1),

A plurality of annular members (52) arranged concentrically,

A plurality of radially extending radial members (53) are installed between adjacent annular members (52, 52),

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).

[2] In 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.

[3] In 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) that are arranged in order with the radially inner force also directed outward.

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). Protective cover featuring.

[4] In the protective cover according to claim 1,

The protective cover, wherein 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.

[5] In the protective cover according to claim 1,

A protective cover characterized in that the radial member (53) has a substantially airfoil cross-sectional shape.

[6] In the protective cover according to claim 1,

A protective cover characterized by being molded with resin.

[7] An air conditioner provided with an air inlet (11),

An air conditioner comprising the protective cover (50) according to claim 1, which covers the air suction port (11).

[8] In the air conditioner according to claim 7,

Further equipped with bellmouth (16) The air conditioner characterized in that the protective cover (50) is detachably fixed to the bell mouth (16).

In the air conditioner according to claim 7,

Further equipped with bellmouth (16)

The air conditioner, wherein the protective cover (50) is formed integrally with the bell mouth (16).