JPH11281084A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an air conditioner in which a maintenance such as the inspection of a blower or cleaning of a coil can be readily performed and labor can be saved. SOLUTION: An air supply passage 12 is formed in the periphery of a box body 3 with a lower part opened. In the box body 3, a blower 9 and a heat exchanging coil 10 are arranged inside and outside an upper space A and a partition member 11 for forming the air supply passage 12 is disposed below the heat exchanging coil 10. An openable cover plate 15 is provided in the upper opening part of the partition plate 11. A bell mouth 20 for the blower is formed integrally with the cover plate 15. An openable central panel 8 is provided in the lower opening part of the box body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension type air conditioner mounted in a ceiling.

[0002]

2. Description of the Related Art As shown in FIG. 9, an air conditioner mounted in a ceiling has a conventional structure in which a blower block which can be opened and closed is provided below a heat exchange coil. Therefore, when cleaning the inside of the heat exchange coil for maintenance, the panel frame has to be removed from the box one by one, which is very troublesome. In addition, since the box has a structure that cannot be disassembled, when removing the heat exchange coil from the air conditioner for repair or replacement, remove the panel frame from the box and use the lower opening to open the blower and other members inside the box. Had to be removed, which was troublesome. In addition, in stores and the like, obstacles such as merchandise shelves and heavy goods that are not easily moved are often installed under the air conditioner, and in such a situation, the above-described operations such as cleaning and replacement become extremely difficult. There was a problem.

[0003] Further, the conventional air conditioner uses a heat exchange coil having a heat transfer tube having a heat transfer medium having a circular cross section.
In particular, since the shape drag is large, there is a problem that a separation region of an air flow called a dead water region is enlarged, a heat exchange loss is increased, a dynamic pressure is increased, and a running cost is increased. Therefore,
An object of the present invention is to provide an air conditioner that solves the above problems.

[0004]

In order to achieve the above object, an air conditioner according to the present invention has an air passage formed around a box having a lower opening, and a blower is provided in an upper space in the box. A heat exchange coil is provided and a cover plate which can be opened and closed or detachable is provided below the heat exchange coil, and a bell mouth for a blower is attached to or integrally formed with the cover plate,
A panel frame having an openable and closable central panel is attached to a lower opening of the box. Further, a square annular heat exchange coil is disposed in the upper space, and the inner diameter side space of the heat exchange coil is divided into two or four along a diagonal line, and a blower is disposed in each divided part. A bell mouth connected to each blower is attached to or integrally formed with the cover plate. Furthermore, the cross section of the heat medium flow heat transfer tube of the heat exchange coil is formed in an elliptical shape. The top plate of the box is used as a sandwich panel, and parts such as a heat exchange coil and a blower other than the top plate are attached to the top plate. An empty space for accommodating the filter is formed by a partition member, and the empty space is higher than the upper space in the box.

[0005]

1 and 2 show an embodiment of a suspension type air conditioner according to the present invention, which comprises a top plate 1 and four exterior plates 2, 2,... A rectangular box body 3 that is configured and opened downward, an annular panel frame body 6 that has an elongated outlet 4 at the outer edge and is attached to cover the lower opening of the box body 3; A rectangular annular suction port 7 is attached to the central opening 5 of the panel frame 6 so as to swing and open and close.
And a central panel 8 forming

As shown in FIG. 3, an air passage 12 is formed around the inside of the box 3, and a blower 9 and an annular heat exchange coil 10 are arranged inside and outside the box 3 in an upper space A thereof. In addition, a tubular partition member 11 is disposed below the heat exchange coil 10, and a bell mouth 2 for a blower that can be opened and closed downward is provided in an upper opening communicating with the upper space A of the partition member 11.
A cover plate 15 with 0 is provided. The cover plate 15 is integrally formed with a bell mouth 20 which is connected to the air suction port 23 of the blower 9 so as to be detachable. A panel frame 6 provided with a central panel 8 that can be opened and closed is attached to the lower opening of the box 3. Further, an empty space B for storing the filter 14 is formed by the partition member 11, and the empty space B is higher than the upper space A in the box 3.

On the lower surface of the top plate 1, a blower 9 and a short cylindrical heat exchange coil 10 smaller in diameter than the box 3 are detachably mounted inside and outside. The four corners of the heat exchange coil 10 are attached to the top plate 1. In the illustrated example, a drain pan is attached to the heat exchange coil 10. The blower 9 includes a motor 24 and an impeller 25. The impeller 25 is configured by providing a plurality of blades at a predetermined circumferential direction pitch between a disk-shaped main plate attached to the rotating shaft of the motor 24 and a ring-shaped side plate forming the air suction port 23. The blower 9 is attached to the top plate 1 so that the air suction port 23 of the impeller 25 is open downward. In the illustrated example, the casing of the motor 24 is attached to the top plate 1. The air inlet 23 of the impeller 25 is a bell mouth 20
Communicates with the vacant space B via

The heat exchange coil 1 is provided below the heat exchange coil 10.
A partition member 11 is disposed along the line 0 to form an air passage 12 that connects the suction port 7 and the air outlet 4. The air passage 12
The vacant space B, the upper space A, and the annular vacant space C formed by the outer peripheral surface of the partition member 11 and the inner peripheral surface of the box body 3 are connected and connected. The white arrow in FIG. 3 indicates the direction of air flow.

The outlet 4 communicates with the annular chamber C, and the suction port 7 communicates with the chamber B. Reference numeral 14 denotes a filter which is detachably held on the upper surface of the panel frame 6 and is disposed so as to cover the central opening 5 of the panel frame 6. The partition member 11 is detachably attached to the exterior plate 2 via the connecting plate 13, and the panel frame 6 is detachably attached to a lower portion of the partition member 11.

The lid plate 15 for covering the upper opening of the partition member 11 has one end edge of one end of the partition member 11 so that the lid plate 15 can be vertically opened and closed about one end edge as an axis. And the other end is detachably attached to the other upper end of the partition member 11. Although not shown, the partition member 11 is provided without providing the cover plate 15 which can be swingably opened and closed.
A detachable lid plate 15 may be provided in the upper opening of. The cover plate 15 is configured to be detachable with various detachable members such as bolts, nuts and hooks.

The air conditioner is provided with two facing outer plates 2,
2 and the top plate 1 are connected to a solid portion 16 of the building via suspension bolts 17 and the like, and are suspended so that the lower surface of the panel frame 6 is exposed to the room through the opening of the ceiling plate 18. The top plate 1 of the box body 3 is a sandwich panel having good heat insulation and high rigidity, and components such as the heat exchange coil 10 and the blower 9 excluding the top plate 1 are detachably attached to the top plate 1 in a suspended manner. . 3 and FIG. 4 shows a mounting point of each member such as the top plate 1, the exterior plate 2, the partition member 11, the connection plate 13, the blower 9, the cover plate 15, the panel frame 6 and the heat exchange coil 10. These members are indicated by chain lines, and these members are configured to be detachable with various detachable members such as bolts, nuts, and hooks.

When the air conditioner is operated, air is sucked in from the inlet 7, is radially blown radially outward through the bell mouth 20 of the blower 9, and passes through the heat exchange coil 10. The heat-exchanged air is supplied from the outlet 4.

As shown in FIG. 5, in the present invention, the central panel 8 is provided.
, The filter 14 is taken out of the air conditioner, and the lid 15 is opened downward, so that the inside of the heat exchange coil 10 can be cleaned and the blower 9 can be inspected. That is, when cleaning the inside of the heat exchange coil 10 and checking the blower 9 for maintenance, the center panel 8 and the lid 15 are simply opened without removing the panel frame 6 from the box 3. The work can be performed easily, and even if there is an obstacle under the air conditioner, the work is easier than when the panel frame 6 is removed.

Further, the user enters the ceiling through the inspection port 19 of the ceiling, removes the exterior plates 2 and 2 not connected to the solid portion 16 (see FIG. 4), and connects the exterior plates 2 and 2 connected to the solid portion 16 and the panel frame. The heat exchange coil 10 can be taken out by removing the blower 9 and the heat exchange coil 10 while keeping the body 6 and the partition member 11 as they are. That is, when removing the heat exchange coil 10 from the air conditioner for repair or replacement, etc., the heat exchange coil 10 can be removed simply by removing a few exterior panels 2 and the blower 9 in the ceiling, and the work is easy. Yes, even if there is an obstacle under the air conditioner, it does not hinder the work.

As shown in FIG. 6, the heat exchange coil 10
In the plate fin coil, a radial cut surface of the heat medium flow heat transfer tube 21 that is in contact with the blowing air is formed in an elliptical shape.
It is most preferable that the major axis direction of the elliptical shape be substantially parallel to the blowing direction P in order to reduce the air resistance. As a result, the resistance when air passes through the heat exchange coil 10 is reduced, and a rise in dynamic pressure can be prevented, and a separation region of the airflow called a dead water area denoted by reference numeral F is reduced, thereby reducing heat exchange loss. Moreover, if the blower 9 is a turbo blower, a high static pressure can be obtained, the pressure loss in the heat exchange coil 10 is small, and the running cost can be greatly reduced. Here, the ellipse in the present invention includes an ellipse close to a rhombus and a so-called oval shape in which both short sides of a rectangle protrude outward.

FIGS. 7 and 8 show an air conditioner for a large air volume, which is obtained by modifying a part of the above-described embodiment. In FIG. 7 and FIG. The space on the inner diameter side of the heat exchange coil 10 is divided along a diagonal line by a partition plate 30 and divided into two, and a blower 9 is disposed at each of the triangular divisions D, and the air suction of each of the blowers 9 is performed. Mouth 2
3 shows a bell mouth 20 which is connected to each other and is integrally formed with the cover plate 15. The partition plate 30 is detachably attached to the top plate 1, for example. The other configuration is the same as that of the previous embodiment, and the description is omitted. In this case, the entire air conditioner can be made more compact than using one large blower having a large air volume, and the blower 9 having a large air volume can be used rather than making the division D into a rectangular shape.

Although not shown in the drawings, in the embodiment shown in FIGS. 7 and 8, the space on the inner diameter side of the heat exchange coil 10 is divided into four sections along a diagonal line by a partition plate and divided into four parts. The blowers 9 may be provided in each of the divided portions D, and the bell mouths 20 connected to and connected to the air suction ports 23 of the respective blowers 9 may be formed integrally with the cover plate 15. Also in this case, the air conditioner as a whole can be made more compact than using one large blower having a large air volume, and the blower 9 having a large air volume can be used rather than making the division D into a rectangular shape.

The present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the gist of the present invention. Although not shown, the bell mouth 20 and the cover plate 15 may be formed separately, and the cover plates 15 with the bell mouth 20 may be formed by fixing the two to each other. Furthermore, in the present invention, the cover plate 1
Reference numeral 5 includes not only one constituted by one sheet but also a plurality constituted by a plurality of sheets which are independently swingably opened and closed or detachable. The bell mouth 20 may be an air inlet having a shape other than the illustrated example. The number of the outer plates 2 can be freely increased or decreased, and the box 3, the heat exchange coil 10,
The partition member 11 may be a polygon other than a square. Further, the cut surface in the radial direction of the heat medium flow heat transfer tube 21 may be other than an ellipse, and the blower 9 may be a blower other than the turbo blower. Further, the height of the vacant space B and the height of the upper space A can be freely changed.

[0019]

According to the first aspect of the present invention, when cleaning the inside of the heat exchange coil 10 for maintenance, the central panel 8 and the cover plate 15 can be removed without removing the panel frame 6 from the box 3. Work can be performed simply by opening the door, and even if there is an obstacle under the air conditioner, work can be performed more easily than when the panel frame 6 is removed, and labor can be saved. When the blower 9 is maintained and inspected, the bell mouth 20 can be removed from the blower 9 at the same time as opening or removing the cover plate 15, so that the work can be performed quickly and labor can be saved.

According to the second aspect of the present invention, an air conditioner having a large air volume can be obtained with a compact body.

According to the third aspect of the present invention, even in a high wind speed, the dead water area is small, the heat exchange loss can be reduced, and the heat exchange capacity can be improved. Electric power (running cost) can be significantly reduced, and energy and resources can be saved. Because it can be used at a high wind speed, it is possible to reduce the size and cost of the coil and the air conditioner as compared with a conventional coil having the same maximum air volume. The maximum air volume can be increased.

According to the fourth aspect of the present invention, when the heat exchange coil 10 is removed from the air conditioner for repair or replacement, the heat exchange coil 10 can be removed in the ceiling, so that the work is easy and the air conditioner can be removed. Even if there is an obstacle, it will not hinder the work. Since the top plate 1 is a sandwich panel, even if a heavy one is suspended, the top plate 1 has little distortion and is excellent in heat insulation.

According to the fifth aspect of the present invention, since the bulky high-performance or long-life (more than 3000 hours) filter 14 can be used, the number of maintenance operations can be reduced. By reducing the bulk of the coil 10 and the upper space A as the heat transfer tube 21 having the elliptical cross section, the vacant space B can be increased and the bulky filter 14 can be used without increasing the overall air conditioner.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an air conditioner of the present invention.

FIG. 2 is an exploded perspective view of the embodiment.

FIG. 3 is a sectional view of the embodiment.

FIG. 4 is a perspective view of a main part of the embodiment.

FIG. 5 is a side view of the embodiment.

FIG. 6 is a sectional view of a main part of a side surface of the heat exchange coil.

FIG. 7 is an exploded perspective view of another embodiment.

FIG. 8 is a sectional view of the embodiment of FIG. 7;

FIG. 9 is a side view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 3 Box 5 Center opening 6 Panel frame 8 Center panel 9 Blower 10 Heat exchange coil 11 Partition member 12 Ventilation path 14 Filter 20 Bellmouth 21 Heat medium flow heat transfer tube A Upper space B Vacancy P Ventilation direction D Dividing part

[Procedure amendment]

[Submission date] September 16, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

In order to achieve the above object, an air conditioner according to the present invention has an air passage formed around a box having a lower opening, and a blower is provided in an upper space in the box. A heat-exchange coil is disposed and a cover plate that can swing and open and close is provided below the heat-exchange coil, and a bell mouth for a blower is attached to or integrally formed with the cover plate. the provided panel frame body to swing openable central panel, in which attached. The lower part is open
A ventilation path is formed around the inside of the box
When a fan and heat exchange coil are installed in the upper space
In both cases, a lid plate that can swing open and close is installed below the heat exchange coil.
The bell mouth for the blower is attached to this lid plate or integrated.
And a central opening and closing center
Attach the panel frame with the panel
A sandwich panel, and the blower is attached to this top plate
It is a digit. Further, a square annular heat exchange coil is disposed in the upper space, and the inner diameter side space of the heat exchange coil is divided into two or four along a diagonal line, and a blower is disposed in each divided part. A bell mouth connected to each blower is attached to or integrally formed with the cover plate. further,
The cross section of the heat medium flow heat transfer tube of the heat exchange coil is formed in an elliptical shape . The vacant chamber for accommodating a full Iruta was formed by the partition member, the vacant chamber is higher than the upper space of the box body.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

[0019]

According to the first and second aspects of the present invention, when cleaning the inside of the heat exchange coil 10 for maintenance, the case 3 is used.
The work can be easily performed by opening the center panel 8 and the cover plate 15 without removing the panel frame 6 from the apparatus, and even if there is an obstacle under the air conditioner, the work is easier than when the panel frame 6 is removed. Is easy to do and labor saving can be achieved. When the blower 9 is maintained and inspected, the bell mouth 20 can be removed from the blower 9 at the same time as opening or removing the cover plate 15, so that the work can be performed quickly and labor can be saved.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

In the invention of claim 2, the top plate 1 is sandwiched.
Since it is a panel, distortion is small even if a heavy object is suspended.
No, excellent in heat insulation.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

According to the third aspect of the present invention, a compact airframe is used.
An air conditioner with a large air volume can be obtained.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

According to the fourth aspect of the present invention, the dead water area is maintained even at a high wind speed.
Reduce heat exchange loss and improve heat exchange capacity
In addition, the air resistance during coil ventilation decreases,
Power consumption (running cost) of the machine 9
Energy saving and resource saving. At high wind speeds
Because it can be used, compared to conventional coils with the same maximum air volume
All in all, reduce the size and cost of coils and air conditioners.
And the same coil cross-sectional area
The maximum air volume can be increased as compared with the coil.

Claims (5)

[Claims] 1. An air passage 12 is formed around the inside of a box 3 opening downward, and an upper space A in the box 3 is formed.
A blower 9 and a heat exchange coil 10 are disposed on the cover plate 1.
5, a bell mouth 20 for the blower is attached to or integrally formed with the cover plate 15, and a panel frame 6 having an openable and closable central panel 8 is attached to the lower opening of the box 3. A characteristic air conditioner. 2. A rectangular annular heat exchange coil 10 is disposed in the upper space A, and the inner diameter side space of the heat exchange coil 10 is divided into two or four along a diagonal line. The air conditioner according to claim 1, wherein the blowers (9) are provided, and bell mouths (20) respectively connected to the blowers (9) are attached to or integrally formed with the cover plate (15). 3. The heat transfer tube 21 of the heat exchange coil 10.
The air conditioner according to claim 1 or 2, wherein a cross section of the air conditioner is formed in an elliptical shape. 4. The top plate 1 of the box body 3 is a sandwich panel, and components such as the heat exchange coil 10 and the blower 9 excluding the top plate 1 are attached to the top plate 1.
The air conditioner as described. 5. An empty space B for accommodating the filter 14 is formed by the partition member 11, and the empty space B is higher than the upper space A in the box 3. 4. The air conditioner according to 4.