JPH0325229A - Fan housing structure of air conditioner - Google Patents

Abstract

PURPOSE:To restrict a noise caused by a turbulent flow of a high frequency by a method wherein a lower surface of a discharging port is positioned higher than an upper end of an upstream side of a drain pan and an opening of the discharged port is inclined in such a way as the lower surface is closer than an upper surface to a heat exchanger. CONSTITUTION:A relation between a vertical height X between a lower surface 15a of a discharging port 15 and an upper surface plate 1b of a casing 1 and a vertical height Y between an upstream side upper end of a drain pan 17 and the upper surface plate 1b of the casing 1 shows X<=Y in such a way as a lower surface 15a of a discharging port 15 is positioned higher than an upstream side upper end of the drain pan 17. An opening 15c of the discharging port 15 is inclined in such a way as its lower end (a lower end 15a) approaches an indoor heat exchanger 16 more than an upper end (an upper surface 15b). Accordingly, air from the discharging port 15 is distributed in a lateral direction in view of its amount and a sufficient amount of injection can be assured without expanding a sectional shape of the discharged port 15 in a vertical direction. With such an arrangement, a noise of turbulent flow of high frequency is restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fan housing structure for a ceiling-embedded air conditioner.

(Prior art) Conventionally, as this type of air conditioner, for example,
As disclosed in Publication No. 0-165437, Ke! an inlet provided in the casing for sucking air into the casing; an outlet provided in the casing for blowing out air from within the casing; A sirocco fan connected to a motor pongee extending to the fan housing, a heat exchanger provided to face the discharge port of the fan housing, and a heat exchanger arranged below the heat exchanger with a raised peripheral edge. A drain pan that covers the lower part of the container, a partition plate provided so that a chamber part is formed between the discharge port of the fan housing, the heat exchanger and the drain pan, and between the suction port and the partition plate. A suction port side air passage ε is formed, and an air outlet side air passage is formed between the heat exchanger and the blowout port, and the sirocco fan moves air from the suction port to the suction port side air passage. It is known that air is sucked into the chamber through the air exchanger, exchanged heat with the heat exchanger, and then blown out from the air outlet via the air passage on the air outlet side. In this case, the heat exchanger is arranged with the upper part inclined toward the downstream side, and the conditioned air blowing out from the outlet of the fan casing, which is oriented slightly upward (toward the top plate inside the casing), flows into the ceiling inside the casing. By distributing the air volume in the direction of the plate, a sufficient amount of air can be blown out to the heat exchanger.

In addition, a heat exchanger is provided opposite the outlet of the fan housing, and the upper and lower ends of the outlet of the fan housing are connected to each other.
There is also a type in which the heat exchangers are made to protrude perpendicularly to the upstream surface of the heat exchanger and parallel to each other.

(Problem to be Solved by the Invention) By the way, in the case where the heat exchanger is opposed to the discharge port of the fan housing as described above, the air ejected from the discharge port must be perpendicular to the upstream surface of the heat exchanger. Since the air is blown, it is necessary to increase the cross-sectional shape of the outlet to ensure a sufficient amount of air ejected from the outlet. In this case, the cross-sectional shape of the discharge port can be enlarged in the vertical direction by tilting the bottom surface of the discharge port downward or by shifting the bottom surface of the discharge port downward while keeping it parallel to the top surface. This ensures that a sufficient amount of air is blown out.

However, if the cross-sectional shape of the discharge port is expanded in the vertical direction as described above, the upper end of the upstream side of the drain pan (lower part of the heat exchanger) is located on the extension line of the lower surface of the discharge port that is inclined downward. Because the lower surface of the discharge port installed at a different angle is located below the upper end of the drain pan on the upstream side, a portion of the air ejected from the discharge port collides with the upper end of the drain pan on the upstream side. This causes turbulence in the air and generates high-frequency (approximately 800 Hz to IKHz) turbulent noise, which has the drawback of significantly deteriorating hearing sensation.

The present invention has been made in view of this point, and the present invention is designed to ensure a sufficient amount of air to be ejected without locating the lower surface of the outlet below the upper end of the upstream side of the drain pan.
The purpose of this project is to improve the audibility by suppressing turbulent noise and improving the fan housing.

(Means for Solving the Problems) In order to achieve the above object, the solving means taken by the invention according to claim (1) is provided in the casing (1) and for sucking air into the casing (1). A suction port (2), air outlets (4) and (5) provided in the casing (1) and blowing out air from inside the casing (1), and the casing (1)
), a sirocco fan (12) having a rectangular tubular air outlet (15) and connected to a horizontally extending motor shaft (11), and its fan housing <16>
A heat exchanger (16) is provided facing the discharge port (15) of the
) and a drain pan (16) which is placed below the heat exchanger (16>) and whose peripheral edge rises to cover the lower part of the heat exchanger (16>).
7> and the discharge port (15
) and the heat exchanger (IB> and drain pan (17), a partition plate (2l) provided so that a chamber part (20) is formed between the suction port (2) and the partition plate (2l). an air passage on the suction side (22) formed between the heat exchanger (16) and the air outlet side (23) formed between the air outlet (4). The sirocco fan (12} supplies air from the suction port (2) to the chamber section (20) through the suction port side air passage (23).
After exchanging heat with the heat exchanger (IS), the air is sucked into the air outlet (4) through the air passage (23) on the outlet side (23).
) is assumed to be an air conditioner that blows air from the

Then, the discharge port (15) of the fan housing (16)
) Tip and above heat exchanger <! 6〉 distance (C) and
Height 8 (H) of the above fan housing (13) and 0
<C/H<0.3, and the upper surface (15b) and lower surface (15a) of the discharge port (15) of the fan housing (l3) are connected to the upstream surface (15a) of the heat exchanger (16). 1
6a) and are provided to protrude perpendicularly and parallel to each other, and the lower surface 05a of the discharge port (15)
) is positioned above the upper end of the drain pan (17). Furthermore, the opening (15) of the discharge port 05 is positioned above the upper end of the drain pan (17).
c> is inclined so that its lower end is closer to the heat exchanger (16) than its upper end.

Further, the means taken by the invention according to claim (2) is that the opening part (15c) of the discharge port (15>) and the lower surface (
15a> is set within the range of 50°≦0570'.

(Function) With the above structure, in the invention according to claim (1), the air blown out from the outlet (t5) of the fan housing (13) is transferred to the drain pan (15a) of the outlet (15).
The spray is located above the upstream upper end of the drain pan (17) and perpendicular to the upstream surface (tab) of the heat exchanger (16) without colliding with the upstream upper end of the drain pan (17). It will be done.

In that case, the opening (45c) of the discharge port (15) is inclined so that its lower end is closer to the heat exchanger (16) than its upper end.
), the air volume is distributed in the horizontal direction, and a sufficient amount of air is ensured without expanding the cross-sectional shape of the discharge port (15) in the vertical direction. A part of the air ejected from the discharge port (15) no longer collides with the upper end of the upstream side of the drain pan (17) as in the case where the air is expanded to Turbulent noise is suppressed.

In addition, in the invention according to claim ('2J), the discharge port (15)
Since the angle (θ> formed by the opening (15c) and the lower surface (15a) of the discharge port (15) is set within the range of 50°≦06700, the set angle (θ> is 50°>θ). If the range, that is, the difference in the front and back direction between the top and bottom tips of the discharge port becomes too large, the jetting performance of the sirocco fan may deteriorate, or if the set angle (θ) is 70°, the range of θ, i.e. The difference in the longitudinal direction between the upper and lower ends of the discharge port is too small, which prevents the air volume distribution in the lateral direction from deteriorating, and the air from the discharge port (15) is transferred to the sirocco fan. The air volume is efficiently distributed in the lateral direction commensurate with the performance of (12).

(Effect of the invention) As explained above, according to the air conditioner of claim {1}, the lower surface (15a) of the discharge port (15) is connected to the drain pan.
17>, and the lower surface (15a) is located higher than the upper surface (15b) of the heat exchanger (
The opening (15) of the discharge port (15>
c) is tilted, so that the air from the discharge port 05) is distributed horizontally in volume without colliding with the upper end of the upstream side of the drain pan (17), ensuring a sufficient amount of air jetting out. is blown perpendicularly to the upstream surface (16a) of the heat exchanger (16>), suppressing high-frequency turbulence noise caused by air turbulence, thereby improving the audibility. .

Further, according to the air conditioner of claim (2), the discharge port (
15) and the lower surface (15c) of the discharge port (15).
Since the angle (θ) formed with Or,
The setting angle <θ> is set within the θ range of 70°, which prevents deterioration of the air volume distribution in the lateral direction, and allows the air from the discharge port (15> to match the performance of the sirocco fan (l2). It is possible to efficiently distribute wind forces in the horizontal direction.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of a ceiling-embedded air conditioner using a fan housing structure according to the invention of claims (1) and (2), and (1) shows a vertical direction (in the figure) in a plan view. A substantially rectangular air conditioner (A
), the lower surface plate (la) of the casing (1) is attached to the lower surface side of the ceiling plate (B). A suction port (2) for sucking air into the casing (1) is provided in the center of the bottom plate (1a) of the casing (1), and an upper part (2) of the cough suction port (2) is provided. An air filter (3) is provided on the downstream side). In addition, at both ends of the bottom plate <la) of the casing (1) that faces left and right with the suction port (2) in between, first air outlets 4) for blowing out air from inside the casing (1) are provided. and a second air outlet (5>) are each formed in the vertical direction.

Further, above the second air outlet (5) in the casing (1), a motor shaft (11) extending in a substantially horizontal direction is provided.
) Connected to the top of the blower (12) (Syrotsko fan)
is provided. The fan housing (13) of the blower (12) is provided with a substantially circular suction port (14) and a rectangular tubular discharge port (15). Air outlet (2
) above the inner end surface side is the fan housing (l3>
The indoor heat exchanger (16) facing the discharge port (15) (
heat exchanger) is provided, and the indoor heat exchanger <16>
acts as an evaporator during cooling operation, while acting as a condenser during heating operation. In the indoor heat exchanger (16), an outdoor unit including an outdoor heat exchanger and a compressor (not shown) is connected to the refrigerant pipe (16).
(not shown) so that refrigerant can flow therethrough.

Furthermore, a drain pan (17) having a substantially U-shaped cross section is provided on the lower side of the indoor heat exchanger (16), the peripheral edge of which rises to cover the lower end (lower part) of the indoor heat exchanger (IB). The drain water separated from the air by heat exchange with the indoor heat exchanger (L6) is stored.

Furthermore, a chamber part (20) is formed in the upper part of the casing (1) between the discharge port (15> of the fan housing (13) and the indoor heat exchanger (16) and the drain pan (17). A partition plate (21) is provided to partition the suction port (2) and the partition plate (2l).
), and an air passage (22) on the suction port side is provided between the first and second air outlets (4). (5)
There is an air passageway on the outlet side (23) between the and the partition plate (2l).
is provided. Then, the proar (l2) moves air from the suction port (2) to the suction port side air passage (2).
2) into the chamber part (20), heat exchanged with the indoor heat exchanger (16), and then the air is sucked into the first and second air outlets (4) through the air outlet side air passage (23). (
The air is blown out from 5>.

The air outlet side air passage (23) is connected to the partition plate (21).
a first passage part (32) whose upstream end is connected to the left end of the casing (1) and which extends in the vertical direction;
The branch part (33> provided on the downstream side (near the lower part of the blower (l2)) of The first passage part (32) is composed of a second passage part (34) and a second passage part (34).
doubles as the chamber part (20), and the partition plate (2
1), the top plate (1b) and the left side plate (lc) of the casing (1), and a plate that is integrally formed on both sides of the left side plate (1C) and extends toward the right side plate (ld) of the casing (1). The first front side (not shown) and the first back side (
36> and is formed to have a substantially rectangular cross section.

Further, the second passage section (34) is connected to the drain pan (1).
7) is connected to the lower end on the downstream side of the
The inner surface (37) extending toward the air outlet (5) substantially matches the height of the upper surface of the air filter (3), and both left and right ends thereof are the inner end surface of the first air outlet (4) and the second air outlet (37). Inner end surface i of 5〉:'A second front side surface (not shown) and a second rear side surface (not shown) that are integrally formed with both side surfaces of the outer surface (38) and extend upward. The side surface (39) is formed into a substantially rectangular cross section.

Then, the left side plate (1c) corresponding to the branch part (33>
) A substantially triangular protrusion (40) whose tip protrudes toward the second passage portion (34) is provided on the inner surface. Also,
Due to the Coanda effect, the inner surface (37) of the second passage part (34) facing the projection part (40) has a
2) A curved portion (41) with a radius (r) is provided for sucking the air flowing therein into the second passage portion (34>), and this curved portion (41) allows the shape of the protrusion (40>) to be However, the Coanda effect is small enough that the Coanda effect is assisted without the tip protruding too much toward the second passage part (34), and from this, the jet resistance of the air flowing inside the first passage part (32) is small. On the other hand, the air passage on the suction side (22) is made small by the casing (1) so as not to interfere with the second B passage section (34>) of the air passage on the outlet side (23).
Top plate (1b), right side plate (ld), partition plate (2)
1), the inner surface (37) and these face plates (lb).
(ld). (21). A third front side (not shown) and a third rear side (
42) are formed to extend in the vertical direction and are shifted in position in the vertical direction of the casing (1).

Then, the discharge port (15) of the fan housing (13)
) Distance (C) between the tip (downstream end of the lower surface (15a) of the discharge port (15)) and the upstream surface (tea) of the indoor heat exchanger (l8) and the height of the fan housing (13) (H
) is set within the range of 0<C/H<0.3.

Further, the discharge port (15) of the fan housing (13)
The upper surface (15b) and lower surface (15a) of the indoor heat exchanger (16) are provided to protrude perpendicularly to the upstream surface (16a) of the indoor heat exchanger (16) and parallel to each other. Further, the lower surface (15a) of the discharge port (15) is arranged between the lower surface (15a) of the discharge port (15) and the casing (l) so that it is located above the downstream upper end of the drain pan <17>. The vertical height (X) between the bottom surface of the top plate (lb) and the vertical height between the upstream upper end of the drain pan (2{〉) and the top plate (1b) of the casing (1). Height (Y) This relationship is X5Y.The lower end (lower surface (15a)) of the opening (!5c) of the discharge port (15) is lower than the upper end (upper surface (15b)'). is also inclined to approach the indoor heat exchanger (i6), and the angle (θ) between the opening (15c) of the discharge port (15) and the lower surface (15a) of the discharge port (15) is 50 ″≦057
It is set within the range of 0°.

Furthermore, (43)l;! , *1 Air outlet (2) This is a louver that guides the blowing direction of conditioned air from the second air outlet (3).

Next, the functions and effects of the above embodiment will be explained. The discharge port (15) is arranged so that the lower surface (15a) of the discharge port (15) is located above the upstream upper end of the drain pan (17).
The lower surface (15a) of the casing (1) and the upper surface plate (lb) of the casing (1)
vertical height (X) between the drain pan (17
〉 upper end on the upstream side and the top plate (1b) of the casing (1)
Since the relationship between the height (Y) in the vertical direction between
5> is blown perpendicularly to the upstream surface (16a) of the indoor heat exchanger (16) without colliding with the upper end of the drain pan (t7) on the upstream side.

In that case, the opening (15c) of the discharge port (15>) has its lower end (lower surface (15a)) connected to its upper end (upper surface (x5b)).
Since it is inclined closer to the indoor heat exchanger (16) than the air outlet (15), the air volume from the outlet (15) is distributed in the horizontal direction and the cross-sectional shape of the outlet (15) is expanded in the vertical direction. This ensures a sufficient amount of ejection, and the cross-sectional shape of the ejection port is enlarged in the vertical direction (
The part of the air blown out from 15> is the drain pan (17)
Since there is no collision with the upper end of the upstream side of the air, high frequency (approximately 800 Hz to IKHz) turbulence noise caused by air turbulence is suppressed, and the hearing sensation can be improved.

In addition, the opening (15c) of the discharge port (15) and the discharge port (1
5) The angle (θ> formed with the lower surface (15a) is 50°≦θ
Since the setting is within the range of ≦70″, the setting angle (θ
〉 is in the range of 500〉θ, that is, the difference in the front-rear direction between the top and bottom tips of the discharge port is too large, resulting in a decline in the jetting performance of the sirocco fan, and the setting angle (θ
) is 70'' and the range of θ, that is, the difference in the front-rear direction between the top and bottom tips of the discharge port is too small, so that the air volume distribution in the lateral direction does not deteriorate. Air from the discharge port (15) can be efficiently distributed in the horizontal direction in accordance with the performance of the prower (12).

It should be noted that the present invention is not limited to the above embodiments, but includes various other modifications.

For example, in the above embodiment, the bottom plate (
1a) with first and second air outlets (4). (5) are respectively provided, but it goes without saying that one outlet or three or more outlets may be provided on the bottom plate of the casing.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an air conditioner showing an embodiment of the present invention. (1)...Casing (2)...Suction port (4)...First outlet (5)...Second outlet (11)...Motor shaft (12)...Floor (Work 3)...Fan housing (14)...Suction port (15)...Discharge port (15a)...Bottom surface (15b)...Top surface (15c)...Opening (16) ... Indoor heat exchanger (16a) ... Upstream surface (17) ... Drain pan (20> ... Chamber part (2l) ... Partition plate (22) ... Suction port side air passage ( 23)...Discharge port side air passage (A)...Air conditioner (C)...Predetermined distance (H)...Fan housing height (θ)...Angle and 2 other people (1 )...Casing (2)...Suction port (4)...First outlet (5)...Second outlet (1l)...Motor shaft (12)...Proa (13) )...Fan housing (14)...Suction port (15)...Discharge port (15a)...Bottom surface (15b)...Top surface (15c)...Opening (16)... Indoor heat exchanger (16a)...upstream surface (17)...drain pan (20)...chamber section (21)...partition plate (22)...suction port side air passage (23)... ...Discharge port side air passage (A) ...Air conditioner (C) ...Predetermined distance (H) ...Fan!) Uzing height (θ) ...Angle Fig. 1

Claims (2)

[Claims] (1) Provided in the casing (1) and the casing (1)
A suction port (2) for sucking air into the casing (
1), which blows out air from within the casing (1); and a rectangular tubular outlet (15), which is provided within the casing (1), and which is oriented horizontally. A sirocco fan (12) connected to a motor shaft (11) extending to the fan housing (13) has a discharge port (
15), and a drain pan (17) which is arranged below the heat exchanger (16) and whose peripheral edge rises to cover the lower part of the heat exchanger (16). and a partition plate (21) provided so that a chamber portion (20) is formed between the discharge port (15) of the fan housing (13), the heat exchanger (16), and the drain pan (17).
), a suction port side air passage (22) formed between the suction port (2) and the partition plate (21), and the heat exchanger (1).
6) and an air passageway (23) on the air outlet side formed between the air outlet (4) and (5),
2), air is sucked into the chamber part (20) from the suction port (2) via the suction port side air passage (23),
In the air conditioner, the air conditioner exchanges heat with the heat exchanger (16) and then blows air out from the air outlets (4) and (5) via the air outlet side air passage (23), the fan housing (13) The distance (C) between the tip of the discharge port (15) and the heat exchanger (16) and the height (H) of the fan housing (13) satisfy 0<C/H<
0.3, and the upper surface (15b) and lower surface (15a) of the discharge port (15) of the fan housing (13) are
The lower surface (15a) of the discharge port (15) is provided so as to protrude perpendicularly and parallel to the upstream surface (16a) of the drain pan (17).
), and the opening (15c) of the discharge port (15) is inclined so that its lower end is closer to the heat exchanger (16) than its upper end. Characteristic fan housing structure for air conditioners. (2) The opening (15c) of the discharge port (15) and the discharge port (1
5) The angle (θ) formed with the lower surface (15a) is 50°≦
The fan housing structure for an air conditioner according to claim 1, wherein the angle is set within a range of θ≦70°.