JP2004077047A - Ceiling embedded type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling embedded type air conditioner in which the flow of air flowing-in to a heat exchanger from a fan is smoothed and made to generate low noise and reduction of the power consumption of the fan are realized. <P>SOLUTION: An electrical equipment box 12 for storing a plurality of electrical equipments is formed in a ring shape below the fan 5 and the wall surface S of the electrical equipment box 12 opposed to this fan 5 is formed in a flat shape. A bell mouth 11 is provided at the central part of the electrical equipment box 12 and a plurality of electrical equipments are dispersed and installed in the electrical equipment box made a ring shape. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a ceiling-mounted air conditioner that is embedded in a ceiling in a room to balance indoor air.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a ceiling-embedded type air conditioner has been used as an advantageous air conditioner of an installation space. An example of the ceiling-mounted air conditioner shown in FIG. 3 will be described.
As shown in the figure, the ceiling-embedded air conditioner has a case main body 1 disposed in a ceiling 0, and a suction port 2 is provided at a central portion of the case main body 1, Around the inlet 2, four outlets 3 are provided through corners. A fan 5 rotated by a motor 4 is provided in the center of the case body 2, and a plurality of heat exchangers 6 are provided around the fan 5.
[0003]
Then, when the fan 5 is rotated by the motor 4, room air is sucked in from the suction port 2 of the case main body 1 by the fan 5, and then sent out to the outer peripheral side of the fan 5 to pass through the heat exchanger 6. When the air passes through the heat exchanger 6, heat is exchanged between the sucked air and the refrigerant, and is sent out from the outlet 3 as conditioned air to the indoor space.
The inlet 2 is provided with an air filter 7 for removing dust in the air, and the outlet 3 is provided with a louver 8 for controlling the direction of air flow, which can change the blowing direction of the conditioned air. Is provided.
[0004]
The fan 5 provided in the ceiling-mounted air conditioner having the above structure includes a main plate 51 to which the rotating shaft 4a of the motor 4 is fixed, and a plurality of blades 53 provided on the main plate 51 at intervals in the circumferential direction. And an annular shroud 52 fixed to the lower ends of the blades 53. Each blade 53 has its inner peripheral front edge 53a directed forward in the rotation direction relative to the outer peripheral rear edge 53b. ing.
Thus, when the fan 5 is rotated, the air in the room drawn through the bell mouth 11 provided in the suction port 2 is pushed to the outer peripheral side by the respective blades 53 and is sent to the heat exchanger 6. It is supposed to be.
[0005]
Many of the electrical components (B1, B2) provided in such a ceiling-mounted type air conditioner are installed in each electrical component box 120 provided around the bell mouth 110 located below the fan 5. I have.
These electrical component boxes 120 are located between the fan 5 and the suction port 2 and are formed on an intermediate panel 100 integrally formed with the bell mouth 110. Each of the electrical component boxes 120 depends on the shape of each electrical component. In general, they are formed in different shapes.
[0006]
This will be described in more detail with reference to FIG. 4A and 4B are diagrams illustrating the configuration of the electrical component box 120. FIG. 4A is a perspective view of an intermediate panel 100 including a plurality of electrical component boxes 120a, 120b, 120c, and 120d, and FIG. FIG. 4 is a partial cross-sectional view of the intermediate panel 100 in the AA cross section. The electrical component boxes 120a, 120b, 120c and 120d are collectively referred to as 120a.
[0007]
As shown in FIG. 4 (a), a hole is formed in the center of the intermediate panel 100 to open the room, and a bell mouth 110 is formed around the hole. Each electrical component box 120a... Corresponding to the shape of each electrical component is formed therearound.
The outer edge of the intermediate panel 100 is formed in a shape in which a square corner is chamfered in accordance with the attachment to the case main body 1.
[0008]
[Problems to be solved by the invention]
The electrical component boxes 120a formed in this way are formed in different shapes according to the shapes of the electrical components (B1, B2) to be accommodated. That is, the flow of the air flowing at the point P1 on the wall surface S of the intermediate panel 100 was greatly impeded.
[0009]
More specifically, as shown by a broken line in FIG. 4B, the air sent from the fan 5 flows toward the heat exchanger 6, and the air is turned by the rotation of the fan 5 to the intermediate panel. 100 flows into the heat exchanger 6 while flowing along the vertical direction on the paper surface, in other words, the circumferential direction of the bell mouth 110.
Therefore, as shown by the dashed arrow in (a), the air before passing through the heat exchanger 6 flows while avoiding each electrical component box 120a, and as a result, each electrical component box 120a is formed. The air flow was obstructed by the convex shape.
[0010]
As a result, the air sent from the fan 5 increases or decreases in the flow velocity when flowing around the electrical component boxes 120a..., And on the wall surface S of the electrical component boxes 120a. In many cases, air separation was caused.
Therefore, an unpleasant sound is generated from the air flowing around each electrical component box 120a, or the power consumption of the fan 5 due to an increase in resistance is increased. It was a big problem.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a ceiling-embedded air conditioner in which the flow of air flowing into a heat exchanger from a fan is smoothed, noise is reduced, and power consumption of the fan is reduced. The purpose is to provide a machine.
[0012]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
According to the first aspect of the present invention, air is sucked from a suction port provided in a case main body, and the air is passed through a heat exchanger by a fan in the case main body to exchange heat. In an embedded ceiling air conditioner that blows out air as conditioned air to perform air conditioning, an electrical component box accommodating a plurality of electrical components is formed annularly below the fan.
[0013]
Since the electrical component box is formed in a ring shape, the central portion of the electrical component box becomes hollow, air from the room is sucked from the central portion, and the sucked air passes through the heat exchanger after passing through the fan. become. That is, since the electrical component box is formed in an annular shape having a central portion that sucks air, the flow of the sucked air by the electrical component box is not hindered.
[0014]
According to a second aspect of the present invention, in the ceiling-mounted air conditioner according to the first aspect, a bell mouth for rectifying the air sucked into the fan is provided at a central portion of the electrical component box. Features.
[0015]
Since the bell mouth is provided at the center of the circular electrical component box, the air passing through the central portion of the electrical component box is smoothly guided to the fan.
[0016]
According to a third aspect of the present invention, in the ceiling-mounted air conditioner according to the first or second aspect, a wall surface of the electrical component box facing the fan is formed to be flat. .
[0017]
Since the wall of the electrical component box facing the fan is formed flat, the flow of air generated by rotation of the fan is not hindered by the electrical component box. More specifically, the flat wall prevents separation of air on the wall of the electrical component box facing the fan, and also prevents the occurrence of a local high-speed region in the flow of air.
[0018]
According to a fourth aspect of the present invention, in the ceiling-mounted air conditioner according to any one of the first to third aspects, each of the electrical components is dispersed and installed in at least two places. .
[0019]
Even if the electrical components are not formed in the same shape, an electrical component box is formed such that all the electrical components to be installed can be installed at appropriate positions.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing the configuration of the ceiling-mounted air conditioner of the present embodiment. In FIG. 1, reference numeral 10 denotes an intermediate panel including a bellmouth 11 and an electrical component box 12 formed in an annular shape around the bellmouth 11.
Note that other configurations are the same as those described in the related art, and thus the same reference numerals are used and the description is partially omitted.
[0021]
The intermediate panel 10 is located between the fan 5 provided at the center of the case body 1 and the decorative panel having the suction port 2, and a bell mouth 11 is formed at the center. The wall S of the intermediate panel facing the fan 5 forms the bottom surface of the case main body 1 provided with the fan 5 and is attached to the case main body 1 via the heat insulating material 9.
The bell mouth 11 and the ring-shaped electrical component box 12 may be formed integrally as shown in the figure, or may be formed as separate components.
[0022]
The height of the electrical component box 12, which is the height of the intermediate panel 10, is set to the same height so as to accommodate the electrical component (B1) having the largest height among the electrical components, In addition, a wall surface facing the fan 5 which is a top surface of the electrical component box 12 formed in a ring shape is formed flat. The height of the electrical component box 12 is substantially equal to or slightly lower than the height of the bell mouth 11.
[0023]
The width of the electrical component box 12 is formed between the bell mouth 11 and the drain guide 13 supporting the heat exchanger 6 as shown in FIG. 1, and the electrical component box having the largest width dimension among the electrical components. It is set so that goods can be stored.
The width of the electrical component box may be freely changed between the bell mouth 11 and the drain guide 13. For example, the width of the electrical component box may be formed so as to be connected to the bell mouth 11 or the wall surface of the drain guide 13. It may be formed up to.
[0024]
Further, the intermediate panel 10 having the electrical component box 12 will be described in detail with reference to FIG. 2A and 2B are diagrams illustrating the configuration of the electrical component box 12, wherein FIG. 2A is a perspective view of the intermediate panel 10 including the electrical component box 12, and FIG. 2B is a diagram illustrating the intermediate panel 10 in the AA section of FIG. FIG.
[0025]
The electrical component box 12 formed in an annular shape around the bell mouth 11 has a flat wall S facing the fan 5 which is the top surface, and the electrical component box 12 has a space inside the annular electrical component box 12. Each electrical component having a different shape is installed at a predetermined position.
The electrical component B2 having a large area and a thin substrate and the electrical component B1 having a large height direction are housed in the same electrical component box 12, and are installed at the most suitable positions for wiring and the like. Will be.
[0026]
Each electrical component is fixed by bolts, support members, or the like, so that it is securely fixed even on the inner wall surface of the electrical component box 12 that is not formed in accordance with the shape of each electrical component.
The outer wall surface S of the electrical component box 12 may be formed flat, and the inner wall surface may be formed with irregularities according to the shape of the electrical component.
[0027]
Next, the flow of air flowing around the electrical component box will be described.
As shown by the dashed arrow in FIG. 2B, the air sucked by the rotation of the fan 5 flows reliably and smoothly toward the fan 5 by the bell mouth 11, and the air sent out from the fan 5 The fluid is sent out to the heat exchanger 6 while flowing along the circumferential direction of the electrical component box 12 having a ring shape.
[0028]
At this time, the air flowing above the electrical component box 12 smoothly flows on the flattened wall surface S of the electrical component box 12, so that the flow velocity does not increase or decrease and the wall S does not peel off. Thereby, the flow of the air near the fan 5 is also smooth, and the resistance when rotating the fan 5 is reduced.
[0029]
In this way, according to the ceiling-embedded air conditioner shown in the present embodiment, the air flows smoothly on the wall surface S of the electrical component box 12 by the air flowing smoothly at the point P2 on the electrical component box 12. Since the separation of the air flow is prevented and the flow velocity does not increase or decrease in the flow, noise due to turbulence of the air generated from the vicinity of the fan 5 does not occur. This makes it possible to realize a ceiling-mounted air conditioner with reduced noise. In addition, since the flow near the fan 5 becomes smooth and the resistance of the rotation of the fan 5 is reduced, the power consumed by the fan 5 can be reduced, and energy can be saved. In addition, each electrical component can be distributed and installed at an appropriate position in the electrical component box 12, so that the degree of freedom in arranging the electrical components can be improved.
[0030]
【The invention's effect】
The ceiling-embedded air conditioner of the present invention described above has the following effects. According to the first aspect of the present invention, since the electrical component box is formed in a ring shape facing the fan, the flow of air flowing toward the fan is not obstructed as compared with the partially provided electrical component box. . Therefore, the power consumption of the fan can be suppressed, and the noise can be reduced.
[0031]
According to the second aspect of the invention, since the bell mouth for rectifying the air sucked into the fan is provided at the center of the electrical component box, the air passing through the electrical component box is smoothly guided to the fan by the bell mouth. As a result, an annular electrical component box for smoothing the air sucked into the fan can be formed.
[0032]
According to the third aspect of the present invention, since the wall of the electrical component box facing the fan is formed flat, separation in the flow of air caused by rotation of the fan and a local high-speed region do not occur. An in-ceiling air conditioner with reduced noise by suppressing the power consumption of the fan can be realized.
[0033]
According to the fourth aspect of the present invention, since each electrical component is installed at least at two or more locations, even when each electrical component is installed, the wall surface of the electrical component box is made flat as a whole. Thus, each electrical component can be installed at an appropriate position. That is, the degree of freedom when installing the electrical components can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an internal structure of an embedded ceiling air conditioner according to an embodiment of the present invention.
2A and 2B are diagrams illustrating a configuration of an electrical component box, wherein FIG. 2A is a perspective view of an intermediate panel including the electrical component box, and FIG. 2B is a partial cross-sectional view of the intermediate panel taken along a line AA in FIG. FIG.
FIG. 3 is a cross-sectional view illustrating an internal structure of a conventional ceiling-mounted air conditioner.
4A and 4B are diagrams illustrating a configuration of a conventional electrical component box, wherein FIG. 4A is a perspective view of an intermediate panel including a plurality of electrical component boxes, and FIG. It is a fragmentary sectional view of a panel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case main body 2 Suction port 5 Fan 6 Heat exchanger 10 Intermediate panel 11 Bell mouth 12 Electrical component box 13 Drain pan B1, B2 Each electrical component S Wall surface of electrical component box facing fan

Claims (4)

A ceiling that sucks air from a suction port provided in the case body, passes the air through a heat exchanger by a fan in the case body to exchange heat, and then blows out air-conditioned air from a blower outlet into a room space to perform air conditioning. In embedded air conditioners,
An electrical component box accommodating a plurality of electrical components is formed in an annular shape below the fan, and is a ceiling-mounted air conditioner. The ceiling-mounted air conditioner according to claim 1, wherein a bell mouth for rectifying air sucked into the fan is provided at a center of the electrical component box. The ceiling-mounted air conditioner according to claim 1 or 2, wherein a wall surface of the electrical component box facing the fan is formed flat. The ceiling-mounted air conditioner according to claim 1, wherein each of the electrical components is distributed and installed in at least two places.

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