JPH0618056A - Air-conditioning device - Google Patents

Abstract

PURPOSE:To reduce the height of an air-conditioning device without reducing the heat-exchange efficiency of a heat-exchanger. CONSTITUTION:In a ceiling flush type air-conditioning device 1, a heat-exchanger 3 forms a double structure of inner and outer heat-exchangers 3a and 3b. By spanning a coupling sheet 7 between the heat-exchangers 3a and 3b, an independent space on the primary side is formed in each of the heat-exchangers 3a and 3b. This constitution reduces height in a state that a total sum of the area of the air flow part of the whole of the heat-exchanger 3 is ensured, decreases the height of the air-conditioning device without reducing performance of an air-conditioner, and enables installation of the air-conditioning device to a ceiling the internal space of which is reduced in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner such as a ceiling-embedded air conditioner, and more particularly to measures for reducing the height of the air conditioner.

[0002]

2. Description of the Related Art Generally, as an air conditioner, Japanese Patent Laid-Open No.
A ceiling-embedded air conditioner as disclosed in Japanese Patent Publication No. 39828 is known. In this ceiling-embedded air conditioner, as shown in FIGS. 8 and 9, a casing (a) having an opening at the lower side is embedded in a ceiling plate (b) and attached to the inside of the casing (a). The heat exchanger (c), the turbo fan (d), etc. are housed, while the front panel (e) is detachably attached to the lower opening of the casing (a). Then, by driving the turbo fan (d), indoor air is supplied from the central suction port (f) of the front panel (e) to the casing (a).
After sucking in, it flows toward the heat exchanger (c) (Fig. 8).
9 and the arrow A in FIG. 9), the heat is exchanged with the heat exchanger (c) so that cold air or the like is blown into the room from the side outlet (g) of the front panel (e). ing.

[0003]

By the way, in the above-described ceiling-embedded air conditioner, the installation position thereof is restricted by the height of the ceiling internal space. In other words, if the height dimension in which the air conditioner can be installed in the interior space of the ceiling is smaller than the height dimension of this air conditioner, the air conditioner cannot be installed. Therefore, this kind of air conditioner is required to have a height as small as possible in order to avoid such a situation.

When the height of the air conditioner having the above-described structure is simply reduced, the height of the turbofan (d) or the like is reduced without significantly deteriorating its performance. However, since the height dimension of the heat exchanger (c) largely controls the performance, simply reducing the height dimension of the heat exchanger (c) causes The performance will be significantly reduced, leading to a reduction in the performance of the air conditioner. Therefore, in the conventional configuration, when it is attempted to reduce the height of the air conditioner without significantly deteriorating the air conditioner performance, the heat exchanger (c) is improved in performance and the heat exchanger (c) is improved. It is necessary to improve the heat insulating property of the drain pan (h) arranged on the lower side of the drain pan (h) to make the drain pan (h) thin. However, such a configuration leads to a large increase in manufacturing cost. Moreover, it is not preferable in terms of practicality.

The present invention has been made in view of the above circumstances, and provides a structure capable of reducing the height dimension of an air conditioner without causing a large increase in the manufacturing cost as described above. With the goal.

[0006]

In order to achieve the above-mentioned object, the means taken by the present invention has a double structure of the heat exchanger and forms an independent primary side space for each heat exchanger. The height dimension can be reduced without lowering the heat exchange rate. Specifically, the invention according to claim 1 is arranged in a heat exchanger (3) having a large number of fins in an air conditioner casing (2) and a primary side space of the heat exchanger (3). It is premised on an air conditioner which is installed and accommodates a blower fan (5) for feeding air toward the heat exchanger (3). Then, the heat exchanger (3) is provided with an inner heat exchanger (3a) arranged near the blower fan (5), and the blower fan (3a) with respect to the inner heat exchanger (3a). 5) and the outside heat exchanger (3b) arranged on the opposite side. Further, in the primary side space of each heat exchanger (3a), (3b), from the blower fan (5) to each heat exchanger (3a), (3b).
Air is supplied to each of them.

According to a second aspect of the invention, in the air conditioner according to the first aspect, the inner heat exchanger (3a) and the outer heat exchanger (3b) are arranged on the outer peripheral side of the blower fan (5). It is installed and has a substantially circular shape. Also, the upper end of each
The air conditioner casing (2) is retracted by a predetermined dimension with respect to the upper end wall thereof, and a connecting plate (7) is installed between the upper ends of the heat exchangers (3a) and (3b). As a result, a part of the air sent from the blower fan (5) is placed outside between the upper ends of the heat exchangers (3a) and (3b) and the upper end wall of the air conditioner casing (2). An upper flow passage (8) leading to the space on the outer peripheral side of the heat exchanger (3b) is formed. Then, a part of the air fed from the blower fan (5) is circulated from the inner peripheral side to the outer peripheral side of the inner heat exchanger (3a),
After passing the other part through the upper flow passage (8), it is guided to the outer peripheral side of the outer heat exchanger (3b) and directed from the outer peripheral side of the outer heat exchanger (3b) to the inner peripheral side. And distribute it.

According to a third aspect of the invention, in the air conditioner according to the first or second aspect, the inside heat exchanger (3
The height positions of a) and the upper ends of the outer heat exchangers (3b) are set to different positions.

According to a fourth aspect of the invention, in the air conditioner according to the first aspect, the inner heat exchanger (3a) and the outer heat exchanger (3b) are arranged on the outer peripheral side of the blower fan (5). It is installed and has a substantially circular shape. In addition, each heat exchanger (3
The upper end of one heat exchanger (3a) of a) and (3b) is retracted by a predetermined dimension with respect to the upper end wall of the air conditioner casing (2), and the upper end of the other heat exchanger (3b) is It should be attached to the top wall of the air conditioner casing (2). Then, the position of the lower end of the other heat exchanger (3b) is set lower than the position of the upper end of the one heat exchanger (3a). Further, a connecting plate (7) is installed between the upper end of the one heat exchanger (3a) and the lower end of the other heat exchanger (3b), and is fed from the blower fan (5). A part of the generated air is circulated through the lower side of the connecting plate (7) and one heat exchanger (3a), and the other part is passed over the upper side of the connecting plate (7) and the other heat exchanger (3b). ) Is distributed.

The invention according to claim 5 is the same as claim 1,
In the air conditioner described in 2, 3, or 4, the fins (F1), (F) provided in the inner heat exchanger (3a) are included.
, And the fins (F2), (F2), ... Provided on the outer heat exchanger (3b) are formed so as to have different intervals.

According to a sixth aspect of the invention, in the air conditioner according to the second or fourth aspect, the inside heat exchanger (3
A branch guide member (10) formed by integrally extending from a connecting plate (7) at a branch portion of air fed toward (a) and air fed toward the outer heat exchanger (3b). ),
(13) is provided.

The invention according to claim 7 is the air conditioner according to claim 2 or 4, wherein the inner heat exchanger (3
The merging guide members (12) and (14) for guiding each air toward the outlet side are arranged at the merging portion of the air that has passed through a) and the air that has passed through the outer heat exchanger (3b). The configuration.

[0013]

With the above construction, the present invention provides the following actions. First, in the invention according to claim 1,
The indoor air flows into the air conditioner casing (2) as the blower fan (5) is driven, and the air that has flowed into the air conditioner casing (2) flows from the blower fan (5) to the inside heat. It is sent toward the heat exchanger (3a) and the outer heat exchanger (3b) respectively, and after heat exchange between the heat exchangers (3a) and (3b), it is blown out into the room. The heat exchangers (3a) and (3b) are arranged so that the inner heat exchanger (3a) is arranged close to the blower fan (5) and the outer heat exchanger (3b) is arranged inside. The heat exchanger (3a) is disposed at a position opposite to the position of the blower fan (5), and the heat exchangers (3a) and (3b) are provided side by side. Therefore, the height dimension of the heat exchanger (3) can be reduced while ensuring the air circulation area and ensuring the heat exchange rate, without deteriorating the air conditioner performance of the air conditioner (1). The height of the air conditioner (1) can be set small.

According to the second aspect of the present invention, the same effect as that of the first aspect of the present invention can be obtained with respect to the ceiling embedded type air conditioner, that is, the air is sent from the blower fan (5). Part of the air is circulated from the inner peripheral side to the outer peripheral side of the inner heat exchanger (3a), and the other part passes through the upper flow passage (8), and then the outer heat exchanger (3b). ), And is circulated from the outer peripheral side of the outer heat exchanger (3b) toward the inner peripheral side. In this way, a space is formed on the upper side of the heat exchanger (3), and the space can be utilized to supply air to the outer heat exchanger (3b).

According to the third aspect of the invention, since the respective air circulation areas can be set according to the performance of the heat exchangers (3a), (3b) having different effective lengths, the heat exchangers (3a), (3a),
(3b) The respective performances can be sufficiently exhibited, and the air conditioner performance of the air conditioner as a whole can be improved.

According to the invention described in claim 4, similar to the invention described in claim 2, the same operation as the invention described in claim 1 can be obtained for the ceiling embedded type air conditioner, that is, Part of the air sent from the blower fan (5) flows through the lower side of the connecting plate (7) and one heat exchanger (3a), and the other part of the air is above the connecting plate (7). And the other heat exchanger (3b). Thereby, the passage of the air passing through the heat exchangers (3a) and (3b) can be surely divided by the connecting plate (7).

In the invention according to claim 5, the heat exchangers (3a), (3) having different performances due to different effective lengths are used.
Since the air flow rate can be appropriately set by making the gap between the fins (F1) and (F2) different from that in b), the performance can be made uniform.

According to the sixth aspect of the invention, each heat exchanger (3) is guided by the branch guide members (10), (13).
The air flow to a) and (3b) can be carried out smoothly, and the loss coefficient at this branch portion can be reduced.

In the invention according to claim 7, each heat exchanger (3) is guided by the guides of the merging guide members (12), (14).
Since it is possible to suppress collision of the air having passed through a) and (3b) with each other at the merging portion, the conditioned air can be blown out smoothly.

[0020]

【Example】

(First Embodiment) Next, a first embodiment according to the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, (1) is a ceiling-embedded air conditioner, in which an air conditioner casing (2) penetrates through an opening of a ceiling plate (R) to form a ceiling (not shown). Suspended on a slab. The air conditioner casing (2) is formed in a substantially rectangular shape and has an opening on the lower side, and is attached to the concrete slab by a hanging fitting (not shown). And this air conditioner casing (2)
Inside, a heat exchanger (3), a drain pan (4), a turbo fan (5) as a blower fan, etc. are housed and a front panel (6) is detachably attached to the air conditioner casing (2). It has been configured.

The front panel (6) has a suction port (6a) at the center and a plurality of air outlets (6b), (6) at the side.
b), ... Are opened, and the front panel (6) is attached to the lower surface opening of the air conditioner casing (2) so as to cover the opening of the ceiling plate (R). Further, a bell mouth (6c) for guiding indoor air to the turbofan (5) is arranged at the suction port (6a) of the front panel (6).

As a characteristic configuration of this example,
In the heat exchanger (3). Below, this heat exchanger (3)
The configuration of will be described.

This heat exchanger (3) is an internal heat exchanger (3
a) and an outer heat exchanger (3b). As shown in FIG. 2, the heat exchangers (3a) and (3b) are formed in a substantially circular shape in a plan view, and are arranged concentrically with each other with the turbofan (5) as a center.

The inner heat exchanger (3a) is arranged on the inner peripheral side of the outer heat exchanger (3b), the inner peripheral surface of which faces the turbofan (5) and the outer peripheral surface of the outer heat exchanger (3b). The surface faces the outer heat exchanger (3b). Further, on the lower side of the inner heat exchanger (3a), the inner drain pan (4
a) is provided, and the inner heat exchanger (3a) is
It is erected on the upper surface of this inner drain pan (4a).
The height dimension of the inner heat exchanger (3a) is determined by the upper surface of the inner drain pan (4a) and the air conditioner casing (2).
It is set to be smaller than the distance from the upper end wall by a predetermined dimension. That is, the upper end of the inner heat exchanger (3a) is retracted from the upper end wall of the air conditioner casing (2), whereby the upper surface of the inner heat exchanger (3a) and the air conditioner casing (2) are separated from each other. Between the turbo fan (5)
A space is formed in which a part of the air sent from can flow.

On the other hand, the outer heat exchanger (3b) is arranged on the outer peripheral side of the inner heat exchanger (3a), the inner peripheral surface of which faces the inner heat exchanger (3a). The outer peripheral surface faces the vertical wall surface of the air conditioner casing (2).
An outer drain pan (4b) is arranged below the outer heat exchanger (3b). The height dimension of the outer drain pan (4b) matches the height dimension of the inner drain pan (4a), and the outer heat exchanger (3b).
Are erected on the upper surface of the outer drain pan (4b). Further, the height dimension of the outer heat exchanger (3b) is also larger than the distance between the upper surface of the outer drain pan (4b) and the upper end wall of the air conditioner casing (2), like the inner heat exchanger (3a). It is set smaller by a predetermined size. That is, the upper end portion of the outer heat exchanger (3b) is also retracted from the upper end wall of the air conditioner casing (2), whereby the upper surface of the outer heat exchanger (3b) and the air conditioner casing (2) are separated from each other. A space in which a part of the air sent from the turbofan (5) can flow is also formed between the spaces.

A connecting plate (7) is installed over the entire circumference between the upper end of the inner heat exchanger (3a) and the upper end of the outer heat exchanger (3b). The connecting plate (7) divides the space above the heat exchangers (3a) and (3b) from the space between the heat exchangers (3a) and (3b).

With this structure, each heat exchanger (3
An upper flow passage (8) through which a part of the air sent from the turbofan (5) can flow is formed above the a) and (3b). Therefore, a part of the air sent from the turbofan (5) is circulated from the inner peripheral side to the outer peripheral side of the inner heat exchanger (3a) as shown by an arrow B in FIG. On the other hand, as shown by an arrow C in FIG. 1, a part of the other part is guided to the outer peripheral side of the outer heat exchanger (3b) after passing through the upper flow passage (8), and the outer heat exchanger (3b) is guided. Bowl (3
It is designed to be distributed from the outer peripheral side of b) toward the inner peripheral side.

Due to this structure, the height dimension of the heat exchanger (3) is small, but the inner heat exchanger (3a) and the outer heat exchanger (3b) are provided inside and outside. By doing so, the total area of air circulation is secured to be approximately equal to the conventional one, and the overall performance is the same as the conventional one. Further, as the height of the heat exchanger (3) is reduced, the height of other members such as the turbo fan (5) is also set smaller than that of the conventional one.

Next, the operation of the air conditioner (1) constructed as described above will be described. First, by driving the turbo fan (5), room air is blown into the bell mouth (6) through the suction port (6a) of the front panel (6).
It is sucked into the air conditioner casing (2) via c). After that, the indoor air sucked from the suction port (6a) is discharged from the turbo fan (5) toward the heat exchanger (3). And as mentioned above, as for the air which flowed out toward this heat exchanger (3), a part of it is shown from the inner peripheral side of the inner heat exchanger (3a) as shown by the arrow B in FIG. The inner heat exchanger (3
In a), heat is exchanged into conditioned air, while the other part passes through the upper flow passage (8) as shown by an arrow C in FIG. 1 and then the outer circumference of the outer heat exchanger (3b). The outer heat exchanger (3b) is guided to the side, flows from the outer peripheral side of the outer heat exchanger (3b) toward the inner peripheral side, and is heat-exchanged in the outer heat exchanger (3b) to be conditioned air. And each heat exchanger (3
The conditioned air generated in a) and (3b) passes through the confluent space (9) formed between the heat exchangers (3a) and (3b), and the air outlet (6b) of the front panel (6). The air will be blown from the room to the inside of the room to perform air conditioning.

As described above, according to the structure of this embodiment, although the height dimension of the heat exchanger (3) is small, the inner heat exchanger (3a) and the outer heat exchanger (3b) are arranged inside and outside. As a result, the overall performance of the air conditioner is the same as the conventional one, and the height dimension of the air conditioner (1) can be adjusted without deteriorating the air conditioner performance of the air conditioner (1). Can be set small. Therefore, it is possible to reduce the height of the air conditioner without increasing the performance of the heat exchanger and improving the heat insulation of the drain pan to make the drain pan thinner as in the conventional case. It is possible to install on the ceiling surface where the height of the internal space is small.

(Modification) Next, a modification of the above-described first embodiment will be described. As shown in FIG. 3, in this example, first to third guides (10), (11), (12) for guiding the flow of air are provided in each part. Below, each guide (10), (11), (12)
Will be described.

The first guide (10) is the branch guide member according to the invention as defined in claim 6, and is formed on the inner peripheral edge of the connecting plate (7), and the first guide (10) of the inner heat exchanger (3a). It is made of a plate material curved downward from the inner edge of the upper end portion toward the inner peripheral side. As a result, the air flow to the upper flow passage (8) is smoothly performed, and the loss coefficient in this portion is reduced. Further, the distribution amount of the air blown out from the turbofan (5) between the inner heat exchanger (3a) and the outer heat exchanger (3b) can be optimally set by the first guide (10).

The second guide (11) is connected to the outer heat exchanger (3
It is arranged between the vertical wall surface of the air conditioner casing (2) and the upper surface of the drain pan (4) on the outer peripheral side of b), flows through the upper flow passage (8), and the outer heat exchanger (3b). The air introduced to the outer peripheral side of the outer heat exchanger (3b) is smoothly inverted and guided from the outer peripheral side of the outer heat exchanger (3b) toward the inner peripheral side.

The third guide (12) is the merging guide member according to the invention of claim 7, which is arranged on the lower surface of the connecting plate (7) and has a chevron shape protruding downward. And each heat exchanger (3
The air that has passed through a) and (3b) is guided toward the outlet (6b). Thereby, the collision of the air passing through the heat exchangers (3a) and (3b) is suppressed, and the conditioned air can be blown out smoothly.

(Second Embodiment) Next, a second embodiment according to the invention described in claim 3 will be described. As shown in FIG. 4, the air conditioner (1) of the present embodiment has a higher height between the inner heat exchanger (3a) and the outer heat exchanger (3b) in the air conditioner (1) of the first embodiment described above. The size is different. That is, the height dimension of the inner heat exchanger (3a) is set larger than the height dimension of the outer heat exchanger (3b).

With such a configuration, when the air conditioner (1) of the present example is in operation, the air flow area increases on the upstream side of the outer heat exchanger (3b), so that the wind speed increases. As a result, the performance of the outer heat exchanger (3b) having a long effective length can be sufficiently exerted, and the performance of the air conditioner as the entire air conditioner can be improved.

(Third Embodiment) Next, a third embodiment according to the present invention will be described. As shown in FIG. 5, the air conditioner (1) of the present example has an inner heat exchanger (3
The height dimension of a) is set small, while the height dimension of the outer heat exchanger (3b) is large (about 2% of that of the inner heat exchanger).
Doubled). And the inner heat exchanger (3a)
Is the inner drain pan (4) as in the first embodiment described above.
It is erected on the upper surface of a), and a space is formed between its upper end surface and the air conditioner casing (2). On the other hand, the outer heat exchanger (3b) has an upper end surface attached to the upper end wall of the air conditioner casing (2) at a position spaced apart from the vertical wall surface of the air conditioner casing (2) by a predetermined distance.
An outer drain pan (4b) is attached to the lower end.
Further, a connecting plate (7) is installed between the upper end of the inner heat exchanger (3a) and the lower end of the outer heat exchanger (3b).

With such a configuration, when the air conditioner (1) of this embodiment is in operation, a part of the air sent from the turbofan (5) is as shown by an arrow D in FIG.
It is circulated from the inner peripheral side to the outer peripheral side of the inner heat exchanger (3a), passes under the connecting plate (7), and passes through the outlet (6
b), while the other part passes through the upper side of the inner heat exchanger (3a) and the upper side of the connecting plate (7) as shown by arrow E in FIG. It is circulated from the inner peripheral side to the outer peripheral side of (3b), and then the outlet (6b).
Is being led to.

Due to such a structure, even in this example, the inner heat exchanger (3a) and the outer heat exchanger (3b) are provided inside and outside, so that the overall performance is improved. The air conditioner (1) is the same as the conventional one and does not deteriorate the air conditioner performance of the air conditioner (1).
The height dimension of can be set small. Therefore, it is possible to reduce the height of the air conditioner without increasing the performance of the heat exchanger and improving the heat insulation of the drain pan to make the drain pan thinner as in the conventional case. It is possible to install on the ceiling surface where the height of the internal space is small. Not only that, but also unlike the above-mentioned first embodiment, since the merging portion where the air is blown in the opposite direction and joins is not formed, each heat exchanger (3
The air that has passed through a) and (3b) smoothly blows out (6b)
As a result, the air conditioner performance can be further improved.

Further, in the case of this example, the inner heat exchanger (3a)
The height dimension is set according to the wind speed distribution of the air blown by the turbofan (5). That is, since the inner heat exchanger (3a) and the outer heat exchanger (3b) have different height dimensions, their capacities are also different, so that the air flow rate corresponding to this capacity difference can be obtained. ,
The height dimension of the inner heat exchanger (3a) is set, and the area of the air flow passage to the outer heat exchanger (3b) is set.

(Modification) Next, a modification of the above-described third embodiment will be described. As shown in FIG. 6, in the present example, similar to the first and third guides in the above-described modification, the fourth and fifth guides (1
3) and (14) are provided. Below, each guide (1
3) and (14) will be described.

The fourth guide (13) is the branch guide member according to the invention as defined in claim 6, is formed on the inner peripheral edge of the connecting plate (7), and is provided on the inner heat exchanger (3a). It is made of a plate material that extends from the inner edge of the upper end portion toward the inner peripheral side. This allows the air to smoothly flow toward the outer heat exchanger (3b), and the loss coefficient in this portion is reduced.

The fifth guide (14) is the merging guide member according to the invention as set forth in claim 7, and is arranged on the lower surface of the outer drain pan (4b) and has a chevron shape protruding downward. The air is guided toward the air outlet (6b) at the portion where the air that has passed through the heat exchangers (3a) and (3b) joins. Thereby, the collision of the air passing through the heat exchangers (3a) and (3b) is suppressed, and the conditioned air can be blown out smoothly.

(Fourth Embodiment) Next, a fourth embodiment according to the present invention will be described. As shown in FIG. 7, the air conditioner (1) of the present example has substantially the same configuration as the air conditioner (1) of the first embodiment described above. The air conditioner (1) of the present embodiment is characterized by the fins (F) in the heat exchangers (3a) and (3b) inside and outside.
There are intervals 1) and (F2). Specifically, in the configuration of this example, the fins (F1) in the inner heat exchanger (3a),
The interval between (F1), ... Is set larger than the interval between the fins (F2), (F2), ... In the outer heat exchanger (3b).

Explaining the reason therefor, when there is a difference in the air flow velocity in the heat exchangers (3a), (3b), the two heat exchangers (3a), (3b).
If the heat exchange rate is the same for the same wind speed, the heat exchangers (3a) and (3b) have different capacities, and at least one side heat exchanger has sufficient performance. You will not be able to exert it. In order to eliminate this, as described above, the fins (F1), (F
Set the interval of 2) so that both heat exchangers (3
The performances of a) and (3b) are made uniform so that a sufficient heat exchange rate can be obtained.

In some cases, the outer heat exchanger (3
The intervals of the fins (F2), (F2), ... In b) may be set to be large.

Further, in this way, each heat exchanger (3a),
(3b) The configuration in which the distance between the fins (F1) and (F2) is changed may be adopted in the configurations of the second embodiment and the third embodiment described above.

Although the ceiling-embedded air conditioner (1) has been described in each of the above-described embodiments, the present invention is not limited to this, and various ceiling-suspended air conditioners and the like can be used. It can be used in air conditioners. Also,
In the invention according to claim 1, each heat exchanger (3a),
(3b) is not limited to the circular shape.

[0049]

As described above, according to the present invention, the following effects are exhibited. According to the invention described in claim 1, the heat exchanger (3) is provided in the inner heat exchanger (3a) arranged in the vicinity of the blower fan (5) and in the inner heat exchanger (3a). On the other hand, the heat exchangers (3a), (3) are constituted by an outer heat exchanger (3b) arranged at a position opposite to the position of the blower fan (5).
Since the b) is installed side by side, the height dimension can be reduced while ensuring the air circulation area of the heat exchanger (3) as a whole and ensuring the heat exchange rate, and the air conditioner of the air conditioner (1). The height dimension of the air conditioner (1) can be set small without deteriorating the performance.

According to the second aspect of the present invention, the upper ends of the heat exchangers (3a) and (3b) are retracted by a predetermined dimension with respect to the upper end wall of the air conditioner casing (2), and the heat exchange is performed. A connecting plate (7) is installed between the upper ends of the devices (3a) and (3b), and a part of the air sent from the fan (5) for blowing air is supplied to the inner circumference of the inner heat exchanger (3a). From the side toward the outer peripheral side, and the other part is guided to the outer peripheral side of the outer heat exchanger (3b) after passing through the upper flow passage (8).
Since the outer heat exchanger (3b) is circulated from the outer peripheral side toward the inner peripheral side, the effect of the invention according to the above-mentioned claim 1 is exerted on the ceiling-embedded air conditioner. Therefore, it is possible to install the air conditioner on a ceiling surface having a small height in the internal space. Further, a space can be formed above the heat exchanger (3), and the space can be effectively used to send air to the outer heat exchanger (3b).

According to the third aspect of the invention, since the height positions of the upper end portions of the inner heat exchanger (3a) and the outer heat exchanger (3b) are set to different positions from each other, the effective length is reduced. Since the respective air circulation areas can be set according to the performances of the different heat exchangers (3a) and (3b), the respective performances of the heat exchangers (3a) and (3b) can be sufficiently exhibited. It is possible to improve the air conditioner performance of the entire air conditioner.

According to the fourth aspect of the invention, the upper end of one heat exchanger (3a) of the heat exchangers (3a), (3b) is connected to the upper end wall of the air conditioner casing (2). The upper end of the other heat exchanger (3b) is attached to the upper end wall of the air conditioner casing (2), and the position of the lower end of the other heat exchanger (3b) is set to the position of It is set below the position of the upper end of the heat exchanger (3a), and a connecting plate is provided between the upper end of the one heat exchanger (3a) and the lower end of the other heat exchanger (3b). (7) is installed so that a part of the air sent from the blower fan (5) is circulated to the lower side of the connecting plate (7) and one heat exchanger (3a), A part is made to circulate to the upper side of the connecting plate (7) and the other heat exchanger (3b). Since the effect of the invention according to the above-mentioned claim 1 can be exerted to the ceiling-embedded air conditioner in the same manner as the invention of claim 1, the air conditioning to the ceiling surface having a small height of the internal space. Installation of the device may be possible.

According to the fifth aspect of the invention, the fins (F1), (F1), (F1), provided on the inner heat exchanger (3a),
, And the fins (F2), (F2), ... Provided in the outer heat exchanger (3b) are formed so that the intervals are different from each other, so that the heat exchanges have different performances due to different effective lengths. Fins (F) for vessels (3a) and (3b)
Since the air flow rate can be appropriately set by making the intervals 1) and (F2) different, it is possible to make the performance uniform.

According to the sixth aspect of the present invention, the air sent toward the inner heat exchanger (3a) and the outer heat exchanger (3).
A branch guide member (1) integrally formed from a connecting plate (7) at a branch portion with the air sent toward b).
0) and (13) are arranged, so that the air flow to the heat exchangers (3a) and (3b) is smoothly performed by the guides of the branch guide members (10) and (13). Can be performed, and the loss factor at this branch can be reduced.

In the seventh aspect of the invention, each air is guided toward the blow-out side at the confluence of the air passing through the inner heat exchanger (3a) and the air passing through the outer heat exchanger (3b). Since the merging guide members (12) and (14) are arranged, the merging guide members (12) and (1)
By the guide of 4), the collision of the air passing through the heat exchangers (3a) and (3b) at the confluence of the air can be suppressed, so that the conditioned air can be blown out smoothly.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an air conditioner according to a first embodiment.

FIG. 2 is a bottom view showing the inside of the air conditioner.

FIG. 3 is an enlarged view of a main part showing a modified example of the first embodiment.

FIG. 4 is a view corresponding to FIG. 1 in the second embodiment.

FIG. 5 is a view corresponding to FIG. 1 in the third embodiment.

FIG. 6 is a view, corresponding to FIG. 3, showing a modification of the third embodiment.

FIG. 7 is a view corresponding to FIG. 2 showing a fourth embodiment.

FIG. 8 is a view corresponding to FIG. 1 in a conventional air conditioner.

FIG. 9 is a view corresponding to FIG. 2 in a conventional air conditioner.

[Explanation of symbols]

 (1) Air conditioner (2) Air conditioner casing (3) Heat exchanger (3a) Inner heat exchanger (3b) Outer heat exchanger (5) Turbo fan (blower fan) (7) Connecting plate (8) Upper flow passage (10) First guide (branch guide member) (12) Third guide (merging guide member) (13) Fourth guide (branch guide member) (14) Fifth guide (merging guide member) (F1) , (F2) Fin

Claims (7)

[Claims] 1. A heat exchanger (3) comprising a large number of fins in an air conditioner casing (2), and the heat exchanger arranged in a primary space of the heat exchanger (3). In the air conditioner in which a blower fan (5) for feeding air toward (3) is housed, the heat exchanger (3) is arranged close to the blower fan (5). An inner heat exchanger (3a) and an outer heat exchanger (3b) arranged at a position opposite to the position where the blower fan (5) is arranged with respect to the inner heat exchanger (3a). In the primary side space of each heat exchanger (3a), (3b), air is sent from the blower fan (5) toward each heat exchanger (3a), (3b). An air conditioner characterized by being configured as described above. 2. The inner heat exchanger (3a) and the outer heat exchanger (3b) are arranged on the outer peripheral side of the blower fan (5) and have a substantially circular shape. The air conditioner casing (2) is retracted from the upper end wall by a predetermined size, and a connecting plate (7) is installed between the upper ends of the heat exchangers (3a) and (3b). Heat exchanger (3
Between the upper end portions of a) and (3b) and the upper end wall of the air conditioner casing (2), part of the air sent from the blower fan (5) is placed around the outer heat exchanger (3b). An upper flow passage (8) leading to the side space is formed, and a part of the air sent from the blower fan (5) is from the inner peripheral side to the outer peripheral side of the inner heat exchanger (3a). After passing through the upper flow passage (8), the other part of the outer heat exchanger (3b) is introduced to the outer peripheral side of the outer heat exchanger (3b). The air conditioner according to claim 1, wherein the air conditioner is configured to flow from the side toward the inner peripheral side. 3. The inner heat exchanger (3a) and the outer heat exchanger (3b) are characterized in that the height positions of the upper end portions thereof are set to different positions from each other. Air conditioner. 4. The inner heat exchanger (3a) and the outer heat exchanger (3b) are arranged on the outer peripheral side of the blower fan (5) and have a substantially circular shape, and each heat exchanger (3a). ), (3
One of the heat exchangers (3a) of b) has its upper end retracted by a predetermined dimension with respect to the upper end wall of the air conditioner casing (2), and the other heat exchanger (3b) has its upper end. Part is attached to the upper end wall of the air conditioner casing (2), and the position of the lower end of the other heat exchanger (3b) is lower than the position of the upper end of the one heat exchanger (3a). Is set to the side, and a connecting plate (7) is installed between the upper end of the one heat exchanger (3a) and the lower end of the other heat exchanger (3b), and Part of the air sent from the fan (5) flows through the lower side of the connecting plate (7) and one heat exchanger (3a), and the other part of the air flows from the connecting plate (7). The air conditioner according to claim 1, wherein the air conditioner is configured to flow through the upper and other heat exchangers (3b). 5. Fins (F1), (F1), ... And outer heat exchanger (3) provided in the inner heat exchanger (3a).
fins (F2), (F2), ...
The air-conditioning apparatus according to claim 1, 2, 3, or 4, wherein the air-conditioners are formed so as to have mutually different intervals. 6. A connecting plate (7) is integrally provided at a branch portion between air fed toward the inner heat exchanger (3a) and air fed toward the outer heat exchanger (3b). The air conditioner according to claim 2 or 4, characterized in that branch guide members (10), (13) that are extended in a mechanical manner are provided. 7. A merging guide member (12) for guiding each air toward the outlet side at a merging portion of the air passing through the inner heat exchanger (3a) and the air passing through the outer heat exchanger (3b). ), (14) are provided, The air conditioning apparatus of Claim 2 or 4 characterized by the above-mentioned.