JPH06307663A - Ceiling-buried type air conditioner - Google Patents

Abstract

PURPOSE:To reduce a ventilating resistance and a deflecting flow, to improve performance of a heat exchanger and to decrease noise by recovering drain dropped from a lower end of an upper heat exchanger by a drain pan through a tray. CONSTITUTION:A lower end 12 of a lower heat exchanger 8 is disposed at a crossflow fan 5 side, and a folded heat exchanger 6 is inclined to a horizontal plane. An upper heat exchanger 7 is so bent to the fan 5 side as to drop drain of the exchanger 7 from a lower end 11 to increase the inclination of the exchanger 7 larger than that of the exchanger 8. A drain pan 10 is provided under the exchanger 8, a tray 9 is provided under the bend part 11 to feed drain dropped from the part 11 to the pan 10 through the tray 9. Thus, flowing fault of the air due to the tray can be alleviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-embedded air conditioner.

[0002]

2. Description of the Related Art A conventional ceiling-embedded air conditioner (for example, Japanese Patent Application Laid-Open No. 2-282632) will be described with reference to FIGS. FIG. 4 is a horizontal cross-sectional view of a ceiling-embedded indoor unit of an air conditioner, and FIG. 5 is a vertical cross-sectional view thereof. In the figure, reference numeral 51 denotes a casing, and a lower panel 52 of the casing 51 has a suction port 53 and a blowout port 54 formed therein. Inside the casing 51, a cross flow fan 55 that feeds the suction air from the suction port 53 to the air outlet 54, a heat exchanger 56 that is installed on the upstream side of the cross flow fan 55, and the suction A drain pan 58 for collecting condensed water generated when the air from the port 53 passes through the heat exchanger 56 is arranged.

The heat exchanger 56 has a lower end 5
7 must be located above the drain pan 58 and the casing 51 must be embedded in the ceiling.
In order to keep the height of the lower panel low, the inclination angle with respect to the lower panel 52 is made as small as possible.

Reference numeral 59 is a pan provided on the entire surface of the lower region of the heat exchanger 56. The receiving tray 59 receives the drain dropped from the heat exchanger 56 while allowing the suction air from the suction port 53 to flow to the heat exchanger 56 side.
It guides the drain pan 58. In other words, in the receiving tray 59, since the heat exchanger 56 has a small inclination angle, the drain does not flow down the heat exchanger 56 to the drain pan 58, but is allowed to drip into the room through the suction port 53 as it is. It is for prevention.

[0005]

In the above-mentioned ceiling-embedded air conditioner, the tray 59 is provided on the entire surface of the lower region of the heat exchanger 56, that is, in the air passage to the heat exchanger 56. There is a problem that it becomes a hindrance to air circulation, causes an increase in ventilation resistance, and causes noise. Further, although the receiving tray 59 allows the air to flow to the heat exchanger 56 side, the heat exchanger 56 does not allow the air to flow unevenly.
There is also the drawback that it hinders the uniform inflow of air into the heat exchanger 56 and reduces the performance of the heat exchanger 56.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object thereof is to reduce ventilation resistance and uneven flow to improve the performance of a heat exchanger and reduce noise. To provide an embedded air conditioner.

[0007]

Therefore, the ceiling-embedded air conditioner according to claim 1 has a suction port 3 and a blow-out port 4 formed in a lower surface 2 of a casing 1, and the suction port is provided inside the casing 1. A cross-flow fan 5 that sends air from the blower 3 to the outlet 4, a heat exchanger 6 that is arranged on the upstream side of the cross-flow fan 5, and a drain pan 10 that receives the drain dropped from the heat exchanger 6. In the ceiling-embedded air conditioner provided, the heat exchanger 6 is composed of an upper heat exchanger 7 and a lower heat exchanger 8, and a lower end portion 12 of the lower heat exchanger 8 is the cross flow fan 5 The lower heat exchanger 8 is inclined to the upper side with respect to the horizontal plane, and the upper heat exchanger 7 extending obliquely upward from the upper end of the lower heat exchanger 8 has a lower inclination. Than the inclination of the heat exchanger 8 The drain pan 10 is provided below the lower heat exchanger 8 and the receiving pan 9 is provided below the lower end 11 of the upper heat exchanger 7 so that the lower end of the upper heat exchanger 7 is It is characterized in that the drain dropped from the portion 11 is collected in the drain pan 10 through the tray 9.

The ceiling-embedded air conditioner according to claim 2 is
A cross flow fan 5 is arranged on the outlet 4 side of the casing 1, and a fan motor 15 is connected to one end of the cross flow fan 5, while the drain 3 is adjacent to the suction port 3 side of the fan motor 15. A pump 14 is provided, and the upper heat exchanger 7 is connected to the cross flow fan 5
It is characterized in that the electrical component box 16 is arranged in a space formed by inclining to the side.

[0009]

In the ceiling-embedded air conditioner according to the first aspect, since the drain generated in the upper heat exchanger 7 has a large inclination of the upper heat exchanger 7, the lower end travels along the surface of the heat exchanger. It flows down to the portion 11 and drops from the lower end portion 11 to the tray 9. Then, it is collected from the tray 9 to the drain pan 10. The drain of the lower heat exchanger 8 is the drain pan 1 described above.
Drop to 0 as is.

Further, in the ceiling-embedded air conditioner according to a second aspect of the present invention, the cross flow fan 5 and the fan motor 15 connected to one end of the cross flow fan 5 are provided on the outlet 4 side of the casing 1. On the suction port 3 side, the electrical component box 16 is provided in the space formed by inclining the upper heat exchanger 7 toward the cross flow fan 5 side.
And the drain pump 14 is disposed adjacent to the fan motor 15, the drain pump 14
The longitudinal dimension of the casing 1 can be shortened by the dimension of.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the ceiling-embedded air conditioner of the present invention will be described in detail with reference to the drawings. FIG. 1 is an embodiment of the present invention and is a transverse sectional view of a ceiling-embedded indoor unit, and FIG. 2 is a longitudinal sectional view thereof.

In the figure, 1 is a casing, and 2 is a lower panel of the casing 1. A suction port 3 and a blowout port 4 are formed in the lower panel 2, and the casing 1 is embedded in the ceiling so that the suction port 3 and the blowout port 4 face the indoor side.

On the side of the outlet 4 in the casing 1, a cross flow fan 5 for feeding the air sucked from the inlet 3 to the outlet 4, and a cross flow fan 5 in the direction of the axis of rotation of the cross flow fan 5. Fan motor 15 connected to one end
And are arranged. Further, on the suction port 3 side, a folding heat exchanger 6 installed on the upstream side of the cross flow fan 5, an electric equipment box 16 provided in a space on the upstream side of the folding heat exchanger 6, and the fan motor. A drain pump 14 is disposed adjacent to 15, that is, the drain pump 14 is provided side by side in the lateral direction orthogonal to the rotational axis direction. And the above outlet 4
A saucer 9 and a drain pan 10 are arranged below the folding heat exchanger 6 in the approximate center between the suction port 3 and the suction port 3.

The folding heat exchanger 6 is bent at a bent portion 11, and the upper heat exchanger 7 above the bent portion 11 is bent.
And a lower heat exchanger 8 in the lower part. The lower end 12 of the lower heat exchanger 8 is located on the cross flow fan 5 side, and the bent portion 11 is arranged so as to project to the upstream side of the circulating air. That is, the folding heat exchanger 6 is inclined with respect to the horizontal plane, and the upper heat exchanger 7 is inclined so that the inclination angle α of the upper heat exchanger 7 is larger than the inclination angle β of the lower heat exchanger 8 with respect to the horizontal plane. The exchanger 7 is bent toward the cross flow fan 5 side. Further, the inclination angle α of the upper heat exchanger 7 is set such that the condensed water does not drop as it is even under the condition that oil, dust or the like adheres to the heat transfer surface and travels along the heat transfer surface to the lower end of the upper heat exchanger 7. Department,
That is, the angle is such that it flows down to the bent portion 11 and is dripped as a drain from the bent portion 11. In this embodiment, the angle α is set to about 60 degrees.

Further, the electric component box 16 is provided in a space formed on the upstream side of the folding heat exchanger 6 by bending the upper heat exchanger 7 toward the cross flow fan 5 side as described above.
It is thinner than the conventional one and is arranged along the wall surface of the casing 1.

The receiving tray 9 is the upper heat exchanger 7 as in the conventional case.
Is not arranged so as to cover the entire area of the downward projection surface of, but is arranged below the bent portion 11, and receives the drain from the upper heat exchanger 7 which flows down as described above,
The drain is collected in the drain pan 10.

The drain pan 10 is installed below to receive the drain of the lower heat exchanger 8 and below the lower heat exchanger 8 as shown in FIG. 2 so as to receive the drain from the tray 9 as well. Not only that, it is also spread to both sides of the casing 1.

The drain pump 14 is disposed above one side of the drain pan 10 expanded as described above. A float switch 13 is attached to the drain pump 14, and when the amount of drain stored in the drain pan 10 reaches a specific water level, the float switch 13 detects this and the drain pump 14 operates based on this detection. It is driven to discharge drainage.

FIG. 3 is an explanatory view for explaining the structure in which the drain dropped on the tray 9 is collected in the drain pan 10 and shows three kinds of embodiments. All of these figures are views from the cross flow fan 5 side. In FIG. 3 (a), the tray 9 is bent so that the central portion is higher than both side portions, and the drain dropped on the tray 9 is made to flow to both end portions, and further provided at both end portions. The drain is made to flow into the drain pan 10 through the guide and the tray 17 provided. In FIG. 3 (b), the receiving tray 9 is bent as described above so that the drain can flow to both side end portions, but the guide and the drain 17 on the drain pump 14 side are omitted. Also, FIG. 3 (c) shows the above guide and
No. 7 is abolished from both end sides, and the tray 9 is not bent and the entire tray 9 is inclined toward the drain pump 14 side so that the drain is dropped from only the end portion on the drain pump 14 side. .

In the indoor unit having the above structure, when the fan motor 15 is driven and the crossflow fan 5 rotates, air is sucked from the suction port 3 and blown from the blowout port 4, but in the case of cooling operation. Therefore, condensed water is generated on the heat transfer surface of the heat exchanger 6. This condensed water becomes drain and drops downward, but the upper heat exchanger 7
Since the upper heat exchanger 7 has a large inclination angle, the drain of the drain flows down to the bent portion 11 along the heat transfer surface, and from this bent portion 11, the receiving tray 9 arranged below it. Will be dripped into. Then, this drain will flow down from the tray 9 to both sides of the drain pan 10. Further, the drain of the lower heat exchanger 8 is dropped on the drain pan 10 as it is. Then, when the predetermined amount of drain is reached, the float switch 13 detects this and the drain pump 14 drains water.

Since the drain angle is made to drip from the lower side of the bent portion 11 by increasing the inclination angle of the upper heat exchanger 7 in this way, the tray 9 need only be provided below the bent portion 11. It does not have to be provided so as to cover the entire area of the downward projection surface of the heat exchanger as in the conventional case. Therefore, it is possible to alleviate the air flow obstruction and the uneven flow of the inflowing air into the heat exchanger due to the presence of the tray as in the related art, and it is possible to improve the performance of the heat exchanger and reduce the noise.

The electrical equipment box 16 is arranged in a space formed by bending the upper heat exchanger 7 toward the cross flow fan 5 side. For this reason, the drain pump 14 that was conventionally provided on the blower outlet 4 side in the direction of the rotation axis of the cross flow fan 5 can be arranged next to the fan motor 15 on the suction inlet 3 side. Therefore, the longitudinal dimension of the casing 1 can be shortened by the dimension of the drain pump 14 and the apparatus can be made compact.

Although the above embodiment shows an example using the folded heat exchanger 6, the upper heat exchanger 7 and the lower heat exchanger 8 are used.
The same can be implemented in the heat exchanger having a structure in which and are separated.

[0024]

As described above, in the ceiling-embedded air conditioner according to the first aspect of the present invention, it is possible to mitigate the conventional air flow obstruction caused by the pan, so that it is possible to increase the ventilation volume and mitigate the uneven flow of air. As a result, the performance of the heat exchanger can be improved, and the noise accompanying the circulation of air can be reduced.

Further, according to claim 2, since the longitudinal dimension of the casing can be shortened as compared with the conventional case,
The device can be made compact.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of a ceiling-embedded air conditioner of the present invention.

FIG. 2 is a vertical sectional view of the above embodiment.

FIG. 3 is an explanatory diagram for explaining a structure in which drain dropped on the saucer of the above-described embodiment is made to flow to a drain pan, FIG.
Is an explanatory view showing a type in which a guide and a bowl are provided on both sides of the tray, (b) is an explanatory view showing a type in which a guide and a bowl are provided only on one side of the tray, and (c) is a guide and a bowl. The explanatory views showing the types not provided are respectively shown.

FIG. 4 is a transverse sectional view for explaining a conventional example.

FIG. 5 is a vertical sectional view of the conventional example.

[Explanation of symbols]

 1 Casing 3 Suction Port 4 Outlet 5 Cross Flow Fan 6 Folding Heat Exchanger 7 Upper Heat Exchanger 8 Lower Heat Exchanger 9 Saucepan 10 Drain Pan 11 Bent (Lower End) 12 Lower End 14 Drain Pump 15 Fan Motor 16 Electrical Equipment Product box

Claims (2)

[Claims] 1. A suction port (3) and a blow-out port (4) are formed on a lower surface (2) of a casing (1), and the air from the suction port (3) is provided inside the casing (1). A crossflow fan (5) sent to the air outlet (4), a heat exchanger (6) arranged upstream of the crossflow fan (5), and a drain dropped from the heat exchanger (6). In a ceiling-embedded air conditioner including a drain pan (10), the heat exchanger (6) is composed of an upper heat exchanger (7) and a lower heat exchanger (8), and the lower heat exchanger is used. The lower end (12) of the vessel (8) is located on the side of the cross flow fan (5), and the lower heat exchanger (8) is inclined obliquely upward with respect to the horizontal plane, so that the lower heat exchanger ( The upper heat exchanger (7) extending obliquely upward from the upper end of 8) is Is the lower heat exchanger (8)
And is provided with a drain pan (10) below the lower heat exchanger (8),
A saucer (9) is provided below the lower end portion (11) of the upper heat exchanger (7), and drain drained from the lower end portion (11) of the upper heat exchanger (7) is supplied to the saucer (9). ) Through the drain pan (10) to the ceiling embedded air conditioner. 2. A cross flow fan (5) is arranged on the blower outlet (4) side of the casing (1), and a fan motor (1) is provided at one end of the cross flow fan (5).
5) is connected, while a drain pump (14) is disposed adjacent to the suction port (3) side of the fan motor (15),
Furthermore, in the space formed by inclining the upper heat exchanger (7) to the cross flow fan (5) side,
2. An electrical equipment box (16) is arranged.
Ceiling embedded air conditioner.