JP3302895B2 - Embedded air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner embedded in a ceiling, and more particularly to a shape of an outlet and a shape and operation of a wind direction control plate.

[0002]

2. Description of the Related Art FIGS.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an outlet of a conventional ceiling cassette type air conditioner disclosed in JP-A-92266, a flow chart of the horizontal outlet, and a flow chart of the lower outlet. In the figure, the main body is embedded in the ceiling and installed so that only the decorative panel 2 is exposed indoors. Then, the room air sucked from the suction port 4 passes through a heat exchanger (not shown) and is heat-exchanged, and is blown out from the blowout port 3 through a blowout duct 7 from a fan (not shown).

[0003] As shown in FIG.
A recess 21 is provided on the inner wall 19 near the opening surface. The outlet 3 protrudes below the recess 21. Recess 2
1 has a slope 22 gradually inclined toward the center of the duct 7 toward the opening surface.

The outer wall 2 facing the recess 21 in the duct
At 0, a wind direction control plate 10 for airflow control is rotatably supported.

[0005] For example, when the blown airflow advances in the horizontal direction, such as during cooling, the wind direction control plate 10 is oriented parallel to the slope 22 as shown in FIG. In this state, the wind direction control plate 10 is positioned such that its lower end is in contact with the outer wall 20. Such a wind direction control plate 10
With this configuration, of the blown airflow, the airflow flowing between the wind direction control plate 10 and the outer wall 20 is suppressed, and all the airflow flows on the inner wall 19 side of the wind direction control plate 10. At this time, the inner wall 19
Has a recess 21 so that an air flow path is secured. The recess 21 has a slope 22 extending to the opening surface,
The airflow flows along this. Further, the airflow that has passed along the slope 22 becomes a blown airflow along the ceiling surface as shown by an arrow H in FIG. The blown airflow along the ceiling surface does not cause turbulence of the room air, and therefore does not attract hot and humid or dirty room air near the decorative panel 2. For this reason, dew condensation does not occur at the end of the decorative panel 2 and the like, and the ceiling material and the like are not contaminated by attracting dirty indoor air to the ceiling material and the like or causing turbulence. .

When a blown air flow is generated in a downward direction as in heating, as shown in FIG.
0 is the downward direction. Thereby, the wind direction control plate 10 and
The airflow passing between the outer wall 20 advances downward, and the airflow flowing on the inner wall 19 side of the wind direction control plate 10 advances along the slope 22. The two airflows merge, and the blown airflow flows in the direction indicated by arrow I, and becomes a blown airflow substantially downward from the left. Therefore, a short circuit to the suction port 4 can be prevented, and the blowout airflow can reach the floor surface.

[0007]

Since the conventional ceiling cassette type air conditioner is configured as described above, the wind direction control plate 10 is arranged so as to close the air path during horizontal blowing. The blowout pressure loss increases, leading to a significant decrease in air volume or an increase in noise.

In the conventional method, since air is blown along the ceiling during cooling, the space above the ceiling is cooled by heat conduction.
Dew may form, causing mold to form. Therefore, it is necessary to prevent airflow from adhering to the ceiling surface, and in the conventional method, the angle θ of the slope 23 must be 45 ° or more. In this case, the blowing air current is 45 degrees below the horizontal plane.
It is unpleasant because it blows out to about °, especially during cooling, because it gives the user a sense of draft.

When the angle .theta. Of the slope 23 is set as described above, the blowout airflow forms a vortex in the vicinity of the slope 23 due to the rapid expansion at the slope 23 during cooling down blowing, and the indoor air is entrained on the slope 23 to reach the slope 23. Dew forms. That is, in this method, since the lower blowing cannot be used for cooling, it is impossible to rapidly cool the room at the time of startup, for example.

[0010] In addition, the air passage at the time of downward blowing is formed by
The shape is rapidly expanding and contracting, resulting in a large pressure loss and a large deterioration in air volume or noise.

[0011]

An embedding device according to the present invention is provided.
The type air conditioner has an embedded indoor unit body,
A flow path is formed by the inner wall and the outer wall, and the
An outlet that blows out harmonized conditioned air into the room,
It is provided rotatably at the outlet, and the conditioned air
A wind direction control plate for controlling the upper and lower blowing directions,
The cross-sectional shape of the outer wall of the outlet is changed from the upstream side to the first tangent line.
, The arc shape, the second tangent, and the second tangent.
And the second tangent line and the step
It is characterized in that the intersection angle formed with the difference portion is an acute angle.

Also, an embedded air conditioner according to the present invention.
The device has an arc-shaped wind direction control plate,
The direction of the tangent on the leeward side of the arc and the direction of the second tangent
It is characterized by being substantially the same.

Further, an embedded air conditioner according to the present invention.
The device is oriented so that the horizontal blowing direction is about 35 ° below horizontal.
It is characterized by having.

Further, an embedded air conditioner according to the present invention.
The apparatus sets the direction of the second tangent 30-35 ° below horizontal.
It is characterized by being oriented.

Also, an embedded air conditioner according to the present invention.
The device has an arc shape on the leeward side of the inner wall of the outlet, and
The direction of the tangent to the leeward end of the arc shape is the downward blowing direction
It is characterized by being the same as.

Also, an embedded air conditioner according to the present invention.
The device consists of an embedded indoor unit body, inner and outer walls
To form a flow path, which is harmonized by the harmonizing means of the main body.
Outlet that blows conditioned air into the room, and outlet
The conditioned air is blown up and down into the room
And a wind direction control plate for controlling a blowing direction.
The cross-sectional shape of the outer wall of the
Formed with a stepped part forming a concave part at the end of
The direction of the tangent at the intersection with the arc-shaped step
It is characterized by being substantially the same as the direction of the flat blowing.

Also, an embedded air conditioner according to the present invention.
The device has an outlet at the intersection with the arc-shaped step
That the intersection angle between the tangent on the side and the step
Features.

Further, the embedded air conditioner according to the present invention.
The device consists of an embedded indoor unit body, inner and outer walls
To form a flow path, which is harmonized by the harmonizing means of the main body.
Outlet that blows conditioned air into the room, and outlet
The conditioned air is blown up and down into the room
And a wind direction control plate for controlling a blowing direction.
At the leeward end of the outer wall of
Provide a step to be formed, and make the angle of the vertex of the step
It is characterized by having.

Also, an embedded air conditioner according to the present invention.
The device consists of an embedded indoor unit body, inner and outer walls
To form a flow path, which is harmonized by the harmonizing means of the main body.
Outlet that blows conditioned air into the room, and outlet
The conditioned air is blown up and down into the room
And a wind direction control plate for controlling a blowing direction.
At the leeward end of the outer wall of
A step portion for forming a negative pressure region is provided.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to Embodiment 1 of the present invention. Except for special cases, the main body 1 is embedded in the ceiling and the decorative panel 2
Only installed to be exposed indoors. And
The room air sucked from the suction port 4 is cooled or heated and is blown into the room from the blowing port 3. Here, the number of outlets is one, but the present invention can be applied to a case where there are a plurality of outlets as long as it is an indoor unit of an embedded type air conditioner.

FIG. 2 is a cross-sectional view showing a configuration inside the indoor unit main body of the ceiling embedded type air conditioner according to Embodiment 1 of the present invention. The room air sucked from the suction port 4 passes through the heat exchanger 6 and exchanges heat, and is blown out from the blowout duct 3 through the blowout duct 7 from the fan 5.

Since the present invention relates to the outlet, the fan 5, the heat exchanger 6, and the arrangement thereof need not always be in this form.

FIG. 3 is an enlarged sectional view of the outlet of FIG. As shown in the figure, the leeward end 12 of the outer wall and the leeward end 13 of the inner wall are often located on the horizontal line, or the leeward end 12 of the outer wall is the largest in view of the design of making the panel look thin. But it is located 10 ° above. Numeral 8 denotes a ceiling, and inside the wind path, arc-shaped wind direction control plates 10a, 10b which are rotated by a rotating shaft 11 and control a vertical wind direction.
There is. Although an example of two wind direction control plates is shown here, one wind direction control plate may be used. Reference numeral 9 denotes a left and right wind direction control plate for controlling the wind direction in the left and right direction. The left and right wind direction control plates are pivotally supported in a plurality of sheets and move in conjunction with each other. The presence or absence of the left and right wind direction control plates does not matter.

As shown in FIG. 4, the outer wall surface is formed by a first tangent 15 sandwiching the arc 14 as the first means, a second tangent 16 as the third means, and a step 17 as the second means. The direction of the second tangent line 16 is the horizontal blowing direction C01.
Is almost the same as Horizontal blowing direction 35 ° from horizontal
If it is downward, the direction of the second tangent line 16 is 30 degrees from the horizontal.
It should be set from 35 ° to 35 °. The position of the wind direction control plates 10a and 10b at the time of horizontal blowing is at least one.
It is desirable that a plurality of wind direction control plates be disposed in the wind path, and that the tangent C02 on the leeward side be in the same direction as C01. The detailed shape of the step 17 will be described later.

Next, the operation will be described. FIG. 5 shows a blowout flow at the time of horizontal blowout by a solid line. The flow near the outer wall flows along the outer walls 15, 14, and the wind direction control plates 10a, 10b
Converges with the air flow deflected by the air flow and blows out from the step 17 toward the room in the direction of the second tangent line 16.

If the radius of the circular arc 14 is small or the flow velocity is high, the air flow separates from the circular arc 14 and the room air flows backward to the step 17 to cause dew condensation during cooling, or to cause cooling during heating or cooling. Of the second tangent line 16
Blows downward from the direction of. Second tangent 1
If the air flow is provided, the air flow can be reattached to the wall surface. During cooling, the cold air flow and the room air can be separated by the step portion 17 to prevent dew condensation, and the blowing direction can be reliably in the direction of the second tangent line 16. Can be controlled.

The fact that the blow-out direction can be reliably controlled means that the blow-off airflow can be prevented from adhering to the ceiling, so that the ceiling does not become dirty due to this.
Moreover, since it can be blown out at 35 degrees from horizontal,
A comfortable indoor environment can be provided without giving the user a sense of draft.

The step 17 is provided for the purpose of positively creating a flow as shown by the one-dot chain line in FIG. 5 and at the top of the step 17 to completely separate the blown air and the room air.

FIG. 6 shows the detailed shape of the step 17. In order to create the flow indicated by the dashed line,
It is necessary to create a negative pressure area in the area A in FIG. 6A, but for that purpose, the angle θ in FIG. 6B should be 90 ° or more. As long as the negative pressure region A can be formed, the shape outside the step does not matter. For example, as shown in FIG. 6 (c), the shape may be further raised toward the inside of the room outside the step, but the design should be made so that the panel does not obstruct the traveling direction of the blown air flow. In this case, the leeward end 12 of the outer wall is shown in FIG.
The position shown in FIG.

For the purpose of completely separating the room air and the blown air stream at the top of the step portion 17, R in FIG. 6B is ideally an edge, but R is generated during the manufacturing process. Should be kept within R5 mm.

Here, another effect in the shape of FIG. 4 is described. Since C01 and C02 are in the same direction, the airflow is not reduced by the wind direction control plates 10a and 10b and the wall surface, and the airflow resistance is reduced. Since it is low, horizontal blowing can be performed without lowering the blowing air volume or with low noise. Also, since the wind direction control plate 10a is in the wind path,
In the unlikely event that the wind direction control plate is driven more horizontally than the set value, C01 and C02 form a contraction airflow path, the flow velocity near the outer wall increases, and the flow along the second tangent line 16 is strengthened. Horizontal blowing direction is maintained. For this reason, highly reliable airflow control that does not stain the ceiling surface or impair comfort can be achieved.

In addition, in the vicinity of the inner wall, an enlarged wind path is formed by the arc-shaped wind direction control plate 10b and the inner wall surface. Since the wind direction control plate 10b has an arc shape, the airflow flows along the wind direction control plate 10b due to the Coanda effect. Therefore, an expanded airflow is formed in accordance with the expanded air path, and the room air does not flow into the air path as shown by the dotted line in FIG.
No dew occurs during cooling. After being blown out of the air passage into the indoor space, the slow flow near the inner wall is drawn in the direction of the fast flow near the outer wall and flows in the horizontal blowing direction.

Embodiment 2 FIG. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 7 is a sectional view of an outlet of an indoor unit of an air conditioner with concealed ceiling according to Embodiment 2 of the present invention.
As shown in the drawing, the direction of the arc-shaped tangent of the inner wall, which is the fourth means, is substantially the same as the direction H01 of the downward blowing. At this time, it is desirable that the leeward tangents H02 and H03 of the wind direction control plates 10a and 10b are also set to be in the same direction.

Next, the flow of the air flow is shown in FIG. The air flow forms a downward blowing vector and blows out by the arc shape 18 of the inner wall and the wind direction control plate 10b. At this time, since the arc-shaped tangent line of the inner wall is the same as the downward direction, the downward blowing can be performed without increasing the blowing pressure loss more than necessary, without reducing the air volume, or with low noise. . Since the downward blowing angle is horizontal so as not to cause a short cycle and is downward enough to allow warm air to reach the indoor floor surface during heating, it is appropriate that the downward blowing angle is 60 ° to 65 ° from the horizontal.

The flow on the outer wall side flows along the outer wall due to the arc shape 14 and the second tangent line 16 Coanda effect.
It is completely separated from the room air indicated by the dotted line in the figure at the step portion 17. For this reason, since dew does not occur during cooling, it is possible to perform downward blowing even during cooling.

The flow on the outer wall side is based on the outer wall and the wind direction control plate 10a.
After being blown out into the room while being decelerated by the enlarged wind path formed in the inside, the air is drawn into the flow on the inner wall side having a high flow velocity and flows downward.

Here, if this embodiment is used together with the first embodiment or the third embodiment (to be described later), it is possible to prevent dew condensation during horizontal blowing. Since downward blowing and horizontal blowing are the two most severe conditions for dew condensation, it can be said that dew does not occur at an arbitrary blowing angle from horizontal blowing to lower blowing. According to the above-described specific effect, the room can be rapidly cooled, for example, by using the lower blowing at the time of startup. In addition, the swing can be used to lower the sensible temperature by utilizing the sense of airflow, and the low-capacity driving can be performed with pleasure and low-power operation.

Here, the case where the number of wind direction control plates is two has been described, but control can be similarly performed when there is only one wind direction control plate.

Embodiment 3 Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 9 is a sectional view of an outlet of an indoor unit of a ceiling-mounted air conditioner according to Embodiment 3 of the present invention.
The point different from the first embodiment is that the wind direction control plate has a single arc shape, and is arranged in the air path at the time of horizontal blowing. The outer wall is formed by the arc shape 14 and the first tangent 15, and there is no second tangent. The tangent direction of the arc shape 14 is the same direction as the horizontal blowing direction C01.

FIG. 10 shows the flow of airflow during horizontal blowing by arrows. The air flow along the outer wall 12 is controlled by the wind direction control plate 10 on the way.
The air flow deflected by the air flow merges with the air flow to increase the speed, and the step 17
And separates from indoor air and flows horizontally. Arc shape 14
Flows along the arc shape 14 when the radius of the circle can be increased. Then, since the air is completely separated from the room air at the step portion 17, dew condensation does not occur.

Since the wind direction control plate 10 has an arc shape, the air flow flows along the wind direction control plate 10 on the lower side (negative pressure side) of the wind direction control plate 10 due to the Coanda effect. Does not happen. Further, the blowout pressure loss is remarkably low as compared with the case where deflection is performed by the flat wind direction control plate 10.

Since the wind direction control plate is composed of a single sheet, no assembly process is required, and it is possible to manufacture a curved and sheet metal member. If the member is a plastic member, it can be manufactured with a simple mold.

The flow on the inner wall side flows along the circular arc 18, is cut off from the indoor air at the tip, and is drawn into the flow on the outer wall side having a high flow velocity in the indoor space. Since the direction of the airflow is determined by the arc shape 14 on the outer wall side, even if the wind direction control plate 10 is oriented too horizontally, it is possible to blow the airflow accurately in a predetermined direction.

The tangential direction C0 of the tip of the wind direction control plate 10
If 2 is set to be the same as the blowing direction, a large air volume or low noise can be secured without increasing the blowing pressure loss.

[0045]

According to the present invention, an embedded air conditioner according to the present invention is provided.
Changes the cross-sectional shape of the outer wall of the outlet from the upstream side to the first
The tangent, the arc shape, the second tangent, and the second tangent
A second tangent line formed by a step portion forming a concave portion;
By making the intersection angle between the
Airflow to the ceiling due to the formation of a negative pressure area near the difference
Horizontal with no fouling and does not give a draft feeling to the user
Allows air to be blown in any direction.

The embedded air conditioner according to the present invention
The device has an arc-shaped wind direction control plate,
The direction of the tangent on the leeward side of the arc and the direction of the second tangent
By making them almost the same, depending on the wind direction control plate and the wall
Airflow is not reduced and airflow resistance is low, so blowing
Horizontal blowing without lowering air flow or low noise
You can do the pumping out.

The embedded air conditioner according to the present invention
The device is oriented so that the horizontal blowing direction is about 35 ° below horizontal.
Horizontal that does not give the user a sense of draft.
Allows air to be blown in any direction.

Also, an embedded air conditioner according to the present invention.
The apparatus sets the direction of the second tangent 30-35 ° below horizontal.
Orientation does not give the user a sense of draft
Enables air blowing in the horizontal direction.

Also, an embedded air conditioner according to the present invention.
The device has an arc shape on the leeward side of the inner wall of the outlet, and
The direction of the tangent to the leeward end of the arc shape is the downward blowing direction
And the indoor air flow is complete.
Dew does not occur because it is completely separated.

Also, an embedded air conditioner according to the present invention.
The device changes the cross-sectional shape of the outer wall of the
Forming a concave part at the end of the arc shape and the arc shape
Formed at the intersection with the arc-shaped step
The direction of the tangent line is almost the same as the horizontal blowing direction.
This prevents airflow from adhering to the ceiling surface and
This allows horizontal drafting without giving a sense of draft.

Also, an embedded air conditioner according to the present invention.
The device has an outlet at the intersection with the arc-shaped step
The intersection angle between the tangent on the side and the step is made acute.
Better separation of blown air and indoor air
You.

The embedded air conditioner according to the present invention
The device is located on the leeward end of the outer wall of the outlet.
Provide a step to form a recessed part, the top of the step
Air angle and the indoor air
You can separate your mind.

Further, the embedded air conditioner according to the present invention.
The device is located on the leeward end of the outer wall of the outlet.
Provided a step to form a negative pressure area in the more concave part
This makes it possible to separate the blown air from the indoor air.
it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of an indoor unit of a ceiling-embedded air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of the indoor unit of the ceiling-mounted air conditioner according to Embodiment 1 of the present invention.

FIG. 3 is a sectional view of an outlet of the ceiling cassette type air conditioner according to Embodiment 1 of the present invention.

FIG. 4 is a sectional view of the outlet of the ceiling cassette type air conditioner according to Embodiment 1 of the present invention.

FIG. 5 is a blowing flowchart of the ceiling cassette type air conditioner according to Embodiment 1 of the present invention.

FIG. 6 is a detailed explanatory diagram of a step of the ceiling cassette type air conditioner according to Embodiment 1 of the present invention.

FIG. 7 is a sectional view of an outlet of a ceiling cassette type air conditioner according to Embodiment 2 of the present invention.

FIG. 8 is a blowing flowchart of the ceiling cassette type air conditioner according to Embodiment 2 of the present invention.

FIG. 9 is a sectional view of an outlet of a ceiling cassette type air conditioner according to Embodiment 3 of the present invention.

FIG. 10 is a blowing flowchart of the ceiling cassette type air conditioner according to Embodiment 3 of the present invention.

FIG. 11 is a sectional view of an outlet of a conventional ceiling cassette type air conditioner.

FIG. 12 is a flow chart of horizontal blowing of a conventional ceiling cassette type air conditioner.

FIG. 13 is a flow chart of a conventional ceiling cassette type air conditioner under blowing.

[Explanation of symbols]

1 body, 2 decorative panel, 3 outlet, 4 inlet, 5 outlet duct, 10 wind direction control plate, 12
Downwind end of outer wall, 13 Downwind end of inner wall, 14
Arc shape, 15 first tangent, 16 second tangent, 17
Step, 18 inner wall arc shape.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 13/14 F24F 1/00 401

Claims (9)

(57) [Claims] 1. A harmonizing means of an indoor unit main body of an embedded type, and a flow path formed by an inner wall and an outer wall, wherein the main body has the main body.
Outlet that blows conditioned air into the room
, Provided rotatably at the outlet, of the conditioned air
A wind direction control plate for controlling the direction of upward and downward blowing into the room
When provided with a cross-sectional shape of the outer wall of the outlet, or upstream
A first tangent, an arc shape, a second tangent, and a second tangent.
Formed with a stepped part forming a concave part by the line,
The intersection angle between the second tangent and the step is an acute angle.
Embedded type air conditioner characterized by the above-mentioned. 2. The wind direction control plate is formed in an arc shape, and
The direction of the tangential line on the leeward side of the arc shape at the time of extraction,
Characterized in that the directions of the tangents of 2 are almost the same.
The embedded air conditioner according to claim 1. 3. The horizontal blowing direction is about 35 ° from horizontal.
2. The embedding according to claim 1, wherein the embedding is directed downward.
Only air conditioner. 4. The direction of said second tangent is 30 degrees from horizontal.
4. The device according to claim 3, wherein the device is directed downward by 35 degrees.
Embedded type air conditioner. 5. The leeward side of the inner wall of the outlet is arc-shaped.
And the direction of the tangent at the leeward end of the arc
Claims characterized by the same as the downward blowing direction
2. The embedded air conditioner according to 1. 6. A harmonizing means, wherein a passage is formed by an embedded indoor unit main body, an inner wall and an outer wall, and said main body has
Outlet that blows conditioned air into the room
, Provided rotatably at the outlet, of the conditioned air
A wind direction control plate for controlling the direction of upward and downward blowing into the room
When provided with a cross-sectional shape of the outer wall of the outlet, or upstream
And the concave part at the end of the arc shape
Form to be formed with the stepped portion, the stepped portion of the arcuate
The direction of the tangent at the intersection with
An embedded air conditioner characterized by being the same. 7. An intersection between the arc and the stepped portion.
Intersection between the tangent at the outlet side and the step
7. The filling according to claim 6, wherein the angle is an acute angle.
Recessed air conditioner. 8. A harmonizing means, wherein a flow path is formed by an embedded indoor unit main body, an inner wall and an outer wall, and said main body has
Outlet that blows conditioned air into the room
, Provided rotatably at the outlet, of the conditioned air
A wind direction control plate for controlling the direction of upward and downward blowing into the room
And a leeward side at an leeward end of an outer wall of the outlet.
Providing a step portion forming a portion depressed from the end portion,
Embedding characterized in that the angle of the vertex of the difference part is acute
Only air conditioner. 9. A harmonizing means, wherein a flow path is formed by an embedded indoor unit main body, an inner wall and an outer wall, and said main body has
Outlet that blows conditioned air into the room
, Provided rotatably at the outlet, of the conditioned air
A wind direction control plate for controlling the direction of upward and downward blowing into the room
And a leeward side at an leeward end of an outer wall of the outlet.
A step that forms a negative pressure area is formed in the part that is recessed from the end.
An embedded type air conditioner characterized by being radiated.