JPH11223378A - Air-outlet for air-conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-outlet for air-conditioning equipment which enables efficient cooling by independently generating a horizontal diffusion flow even when a complementary relationship is not obtained with a ceiling surface. SOLUTION: There are arranged a cylindrical outer guide 2 which is connected on the upper end side thereof to a supply passage of air such as duct 50 with the axis of the passage made almost vertical in attitude and an inner guide 3 which is disposed inside on the lower end side of the outer guide 2 to have an internal passage thereof divided into at least two circular passages 2d, 3d and 3e. An air flow from the circular passage 2d is made diffusible in the horizontal direction from the periphery at the lower end of the outer guide 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air outlet for an air conditioner for blowing air into a room, and particularly to a large-scale indoor space in which a ceiling plate is not installed around its installation position. The present invention relates to an outlet for an air conditioner capable of efficiently diffusing air for cooling as a horizontal flow.

[0002]

2. Description of the Related Art In air conditioning equipment for buildings mainly, hot air or cold air from a heat exchange equipment is supplied to each room through a duct, and is sent from an outlet installed on a ceiling or a wall connected to the duct. The method of sending it as a wind current is generally adopted.

[0003] Among such outlets, an anemo-type outlet provided with an outer cone fixed to the ceiling and a middle cone or pan which can be switched up and down, which is fixed to the ceiling, is provided. For example, as a typical example, the applicant of the present invention has proposed and proposed a method disclosed in Japanese Utility Model Application Laid-Open No. 7-17-1.
There is one disclosed in Japanese Patent No. 2847.

The conventional basic structure of the outlet, including the anemo-type outlet described in this publication, is that an outer cone whose lower end is conically widened from a chamber connected to an upstream duct is a ceiling plate. The inner cone is fixed so that it faces downward from the inner cone, and the flow path in the streamline direction of the blown air is set in the outer cone as a set of a plurality of coaxially arranged annular cross sections. . Then, in the case of heating, the diffusion of the air flow is promoted even on the indoor side, so the middle cone is adjusted to the raised position, and in the case of cooling, the air flow is ensured as a diffusion flow along the ceiling to secure the reach distance, The middle cone is set in the lowered position.

[0005] In order to make the air flow at the time of such cooling into a horizontal flow along the ceiling, for example, FIG.
, The lower end of the outer cone may protrude slightly below the ceiling surface, which is a well-known technique. This utilizes the Coanda effect of the air flow blown close to the wall or the vicinity of the ceiling. In other words, the air floating under the outer cone is drawn into the discharge air flow around the part where the outer cone protrudes from the ceiling surface, and the discharge air flow is flowed in the streamline direction, so that the flow along the ceiling surface is A field is created, which results in a horizontal flow suitable for cooling.

[0006]

As described above, in the anemo type, the air flow can be switched between the horizontal direction and the vertical direction by adjusting the position of the middle cone.

On the other hand, for example, in a large-scale commercial facility or a store in recent years, rather than interior decoration, to secure a storage space for stocked products and to simplify the carrying in and management of products, for example, a ceiling is used as a one-story building. Simple equipment with an increased height is rapidly spreading. Even with these facilities, there is no difference in providing air conditioning equipment for cooling and heating, but if the air-conditioning outlets are arranged so as to be included in the high ceiling surface, the efficiency of cooling and heating will be much higher. Will decrease.

The simplest way to prevent such a decrease in efficiency is to increase the air-conditioning effect on the floor by arranging the outlets lower than the ceiling surface. Facilities that are suspended and connected to the outlet with the duct exposed are common.

Here, if a conventional anemo-type outlet is used as the outlet, in the case of heating, the heating effect by natural diffusion is maintained even if the discharged airflow is directed to the floor surface. However, in the case of cooling, since the ceiling surface is not connected to the outer cone of the outlet, the aforementioned Coanda effect cannot be obtained, and the discharged air diffuses in a cone shape according to the directivity given in the cone. This alone cannot promote the generation of a diffuse flow in the horizontal direction. Therefore, the diffusion range of the air from the outlet is narrowed as compared with the case where it is installed so as to be included in the ceiling surface, and the cooling efficiency is reduced.

[0010] As described above, it is necessary for the conventional anemo-type outlet to be arranged so that the lower end of the outer cone slightly protrudes from the ceiling surface in order to generate a horizontal flow during cooling. If it is set lower than that, it cannot be used efficiently for cooling.

On the other hand, in the equipment of a large-scale store or the like as described above, since a large number of people gather in the store, the room temperature becomes considerably high even in cold winter. For this reason, an outside air cooling system that takes in outside air and lowers the temperature without operating the cooling device is often adopted, and therefore, in such a large-scale store, the cooling operation is performed throughout the year.

From the above, in a large-scale store or the like in which the outlet is provided at a position lowered from the ceiling surface, the function of switching between cooling and heating does not need to be provided by the outlet, and the arrangement is lowered from the ceiling surface. However, if the horizontal flow is promoted so that the air flow can be diffused over a wide range, the inside of the store can be efficiently cooled.

[0013] It is an object of the present invention to provide an outlet for an air conditioner capable of independently generating a horizontal diffusion flow and achieving efficient cooling even if a complementary relationship with a ceiling surface is not obtained. And

[0014]

SUMMARY OF THE INVENTION The present invention relates to a cylindrical outer guide having an upper end connected to an air supply flow path such as a duct and having a flow path axis substantially vertical, and a lower end side of the outer guide. And an inner guide that divides the internal flow path into at least two or more annular flow paths together with the outer guide, wherein air flow from the annular flow path created by the outer guide is substantially horizontal from the lower peripheral edge of the outer guide. It is characterized in that it has a flow path configuration capable of forming streamlines in the direction.

[0015] In such a configuration, the outer guide can be configured such that the flow path creation surface from the upstream to the downstream has a profile formed by a downwardly convex curve and a substantially horizontal line connected thereto.

A flow path capable of forming a horizontal air flow line is formed at the lower end of the outer guide so as to expand in a skirt shape, and has a lower end outer peripheral edge having a substantially horizontal development surface. An outer vane of an inner guide forming an annular flow path, the outer vane having a cross-sectional shape substantially following the bell, and having a lower end disposed below a horizontal development surface of the bell. In this case, the bells are upwardly or downwardly 10 degrees, respectively, with respect to the horizontal plane.
The angle may be in the range of °.

Further, the inner guide may be one in which at least one or more vanes having a cross-sectional shape substantially following the outer vane are coaxially arranged, and the lower ends of these vanes are arranged above the outer vane.

Further, a resistance mechanism for giving a flow resistance to the air flow may be provided at the flow path inlet of the smallest diameter vane disposed at the center of the inner guide. In this case, the resistance mechanism is a net which interferes with the flowing air. The lever net may be provided at the channel inlet of the vane.

[0019]

FIG. 1 is a longitudinal sectional view of an essential part showing an outline of an air outlet for an air conditioner of the present invention, and FIG. 2 is a bottom view of the essential part.

In FIG. 1, a connector 51 provided at the end of a duct 50 using a flexible pipe or the like piped at a level lower than the ceiling surface has a chamber housing 1 having an outlet.
And an outer guide 2 is connected to the lower end of the chamber housing 1.

The chamber housing 1 is a substantially cubic hollow container, and the outlet is installed in the ceiling or below the ceiling without being included in the ceiling surface.
Can be connected to the duct 50 by connecting the connector 51 to the joint 1a provided on the side instead of connecting from directly above. For example, when the duct 50 is connected to the upper end of the chamber housing 1, the flow line of the supply air is directed vertically toward the outer guide 2. The air flow from the side surface of is bent substantially vertically and flows down to the outer guide 2. Therefore, even when the flow rate of the supply air is large and the flow velocity is high, the air flow is temporarily buffered in the chamber housing 1 because the air flow is subjected to resistance due to the bending of the flow path in the chamber housing 1. Therefore, the air flow toward the outer guide 2 is rectified to some extent in the housing 1, and the uniformity of the flow velocity distribution over the entire flow path cross section of the outer guide 2 is promoted.

The outer guide 2 has a cylindrical portion 2a (see FIG. 3) at the upper end and a bell 2 having a lower end connected to the cylindrical portion 2a and bent in a skirt-spread arc shape.
b. As shown in the enlarged vertical sectional view of FIG. 3, the vertical cross-sectional shape of the bell 2b is an arc profile 2b-1 having a radius R of 90 degrees from the center O and a lower end of the arc profile 2b-1. And an edge profile 2b-2 extending in a tangential direction of the lever, that is, in a direction orthogonal to the axis of the outer guide 2.

Inside the outer guide 2, for example, stays 2c radially arranged in three directions from the center are provided, and the inner guide 3 is fixed to the stay 2c. This fixation can be achieved by, for example, fastening both center portions with bolts, nuts, or the like, and it is preferable that the degree of interference with the streamline of air going downstream from the chamber housing 1 be small.

In the illustrated example, the inner guide 3 is a combination of an outer vane 3a, a middle vane 3b and an inner vane 3c in a coaxial arrangement, and each of the vanes 3a to 3c has a bell-shaped flared peripheral wall. It has a longitudinal sectional shape. The radius of the upper end and the lower end of the middle vane 3b is almost twice as large as that of the inner vane 3c, and the outer vane 3a has a relation of almost three times.
The cross-sectional widths of the annular flow paths 3d and 3e divided into two by 3c are substantially equal.

As shown in FIG. 3, the outer vane 3a has a shape substantially following the inner peripheral surface of the bell 2b of the outer guide 2, but at the lower end side, it is slightly flatter and linearly horizontal than the arc profile 2b-1. It has a cross-sectional shape that changes its orientation in the direction. The outer vane 3a has an axial length protruding below the lower end of the bell 2b of the outer guide 2, and the outer vane 3a
The line segment L-1 rising from the lower end of the outer guide 2 is located outside the cylindrical portion 2a of the outer guide 2. Therefore, the air that is going to penetrate from the cylindrical portion 2a right below the annular flow path 2d between the outer vane 3a and the bell 2b is discharged from the outer vane 3a.
Therefore, there is no flow having a streamline component only in the vertical direction, and all of the flow is obliquely inclined, flows through the annular flow path 2d, and flows along the edge profile 2b-2.

The width of the annular passage 2d between the outer vane 3a and the bell 2b is limited to the annular passage 3d of the inner guide 3.
d, 3e and the inner flow path of the inner vane 3c, and the average radius of the flow path cross section of the annular flow path 2d is larger than the other flow paths. Therefore, the flow rate of the air from the chamber housing 1 is maximum at the flow rate sent out from the annular flow path 2d, and the flow from the space between the outer vane 3a and the bell 2b becomes the main flow and behaves dominantly with respect to the entire flow. become.

The middle vane 3b has substantially the same cross-sectional shape as the outer vane 3a and the inner peripheral surface.
The cross section of the annular flow path 3e between the outer vane 3a and the outer vane 3a is substantially uniform in the streamline direction of the air, and there is no restriction or diffusion of the internal flow path. And the lower end of the middle vane 3b is the outer vane 3a.
The line segment L-2, which is located slightly above the lower end of the outer vane 3 and rises vertically from this lower end, intersects at a point slightly lower than half of the outer vane 3a in the vertical direction. Therefore, even in the annular flow path 3e, there is no air stream line having a component only in the vertical direction, and all of the air stream is discharged as a flow diffusing conically.

Further, the inner vane 3c has a shorter axial line length than the middle vane 3b, and its lower end is sunk into the middle vane 3b. The annular flow path 3d is uniform in the streamline direction, and there is no restriction or diffusion of the internal flow path. The line segment L-3 that rises vertically from the lower end of the inner vane 3c does not intersect with the middle vane 3b. Therefore, the air flow that goes from directly below the cylindrical portion 2a directly through the cylindrical portion 2a as a straight flow Can create a field. However, the flow path for this linear flow occupies only a small flow path cross section on the outer peripheral side of the annular flow path 3d, and the inner vane 3 moves toward the downstream side.
Since c and the middle vane 3b are bent outward, the flow which is going to escape right below is discharged conically in the bending direction of these vanes 3c and 3b.

Further, the inner vane 3c is much smaller than the cross section of the flow passage in any of the other sections, so that the flow rate of the air passing therethrough is smaller than the entire flow rate. However, when air flows out from the cylindrical portion 2a directly below, the air flow rate itself tends to increase because the flow path area is narrowed, and therefore the air from the cylindrical portion 2a suddenly pushes directly below, and particularly in the case of cooling. Such a phenomenon cannot be ignored.

Therefore, a net 4 is provided at the upper end of the inner vane 3c to provide a flow path resistance to the air to be flowed. This net 4 can be formed in a bowl shape which can be dropped from the upper end of the inner vane 3c as shown in FIG.
If the inner diameter of the upper end of c is about 50 mm, about 30 mesh can be used.

By incorporating such a net 4 into the inner vane 3c, it is possible to suppress the flow of the air flow from the cylindrical portion 2a that suddenly penetrates downward from the inner vane 3c. For this reason, the flow velocity of the air flow from the inner vane 3c is reduced as compared with the other flow path areas, and at the same time, the air that cannot enter the inner vane 3c due to the resistance of the net 4 is dispersed to the other flow path areas. Will be.

In the above configuration, when the cooling air or the outside air for cooling is supplied to the chamber housing 1, the air flow flows downward from the chamber housing 1 and flows into the outer guide 2. The air released from the outer guide 2 is divided into one that passes through the annular flow path 2d and one that passes through the inner guide 3.

As described above, the annular flow path 2d has a larger flow path area than any of the other divided flow paths and is the largest, so that the annular flow path 2b bends gently outward of the arc profile 2b-1 and the outer vane 3a. The air flow from the channels tends to diffuse uniformly in a cone. On the other hand, the edge profile 2b-2 is located horizontally at the lower end of the arc profile 2b-1, and the lower end of the outer vane 3a is located at a level lower than the lower end of the outer guide 2. The streamline at the lower end formed by the stream of airflow from the annular flow path 2d receives the guidance history of the outer vane 3a and promotes the flow toward the edge profile 2b-2.

That is, if the lower end of the outer vane 3a is higher than the edge profile 2b-2 and its extension line intersects the arc profile 2b-1, the air flow guided by the outer vane 3a Streamline proceeds in the direction of the arc profile 2b-1. Therefore, the air flow is directly converted into a flow in the obliquely downward direction by the arc profile 2b-1, and flows down without including the flow component in the horizontal direction.

On the other hand, since the lower end of the outer vane 3a is located below the edge portion 2b-2, air passing through the lower end of the outer vane 3a is removed by the same principle as that shown in the conventional example. It can be pulled to two sides. That is, the edge 2b-2 not only acts to guide the air from the annular flow path 2d in the horizontal direction due to its horizontal attitude, but also plays the same role as the ceiling surface in the conventional example. The air from the passage 2d can be discharged as a diffused flow in the horizontal direction.

On the other hand, since the lower end of the middle vane 3b is located slightly higher than the outer vane 3a, the air flow from the annular flow path 3e can be maintained in the middle position even if the lower end of the outer vane 3a is nearly horizontal. No horizontal flow components are actively added to the air flow guided by the vanes 3b. For this reason, it can be discharged as an airflow that follows the directional direction of the annular flow path 3e, and only forms a flow field that does not interfere with the flow developing in the horizontal direction from the annular flow path 2d. Even from the flow ratio, the degree of interference is extremely small. Therefore, the airflow from the annular flow path 2d is maintained in a stable horizontal direction, and the flow is not disturbed.

Similarly to the flow from the annular flow path 3e described above, the flow from the annular flow path 3d is conical in the direction of the flow path to form a flow field. It does not interfere with horizontal flow.

Further, since the net 4 acts as a resistance to the inner vane 3c and the flow rate is reduced, the flow rate of the air flowing immediately below can be reduced, and the draft at the time of cooling can be reduced. Then, the air corresponding to the reduced flow rate is distributed to the other divided flow paths, and the distributed air is most easily collected in the annular flow path 2d having the larger flow path area. It can be added as a spreading flow in the horizontal direction, and the diffusion is performed more effectively.

As described above, even under the installation condition in which the ceiling surface is not provided around the lower end of the outer guide 2 and the Coanda effect cannot be obtained, the air flow that diffuses the air flow from the annular flow passage 2d in the horizontal direction can be obtained. can do. Therefore, even when the outlet is suspended from the ceiling, such as in a large-scale store or an exhibition hall, cooling by air or cooling by outside air can be efficiently performed.

In the outlet of the present invention, it is a matter of course that even if the edge profile 2b-2 is arranged along the lower surface of the ceiling C, the cooling air can be diffused along the ceiling C. Further, as shown in the drawing, the same applies to an assembly in which a gap is provided instead of an arrangement in which the upper surface of the edge profile 2b-2 abuts the lower surface of the ceiling C exactly.

[0041]

According to the first and second aspects of the present invention, the airflow passing through the outlet is discharged from the lower end peripheral edge of the outer guide as having a streamline in a substantially horizontal direction. A diffused flow in the horizontal direction can be obtained without being arranged along the surface, and it can be suitably used as a facility for cooling or outside air cooling by suspending the outlet from the ceiling.

According to the third and fourth aspects of the present invention, the lower end of the outer vane of the inner guide is positioned lower than the lower end of the outer guide, so that the air flow along the outer vane can be moved to the horizontal development surface side of the outer guide. The horizontal spreading surface can be used as a substitute for the ceiling surface to efficiently obtain a diffused flow in the horizontal direction.

According to the fifth aspect of the present invention, since the inner guide is constituted by the coaxial arrangement of the plurality of vanes, it is possible to discharge air in the direction of conical diffusion and directly below the same time as the horizontal diffusion flow by the outer vanes.

According to the sixth and seventh aspects of the present invention, the air flow penetrating in the vertical direction can be restricted, so that the draft can be prevented from being generated immediately below the outlet, and the reduced amount of air can be reduced by, for example, the outer vane and the outer vane. The suction in the annular flow path between the guide and the guide further promotes the horizontal diffusion during cooling.

[Brief description of the drawings]

FIG. 1 is a front cutaway view showing a main part of an outlet of the present invention together with a duct and a chamber housing.

FIG. 2 is a bottom view of a main part of the outlet.

FIG. 3 is an enlarged vertical sectional view showing a main part of an outer guide and an inner guide.

[Explanation of symbols]

 Reference Signs List 1 chamber housing 1a joint 2 outer guide 2a cylindrical portion 2b bell 2b-1 arc profile 2b-2 edge profile 2c stay 2d annular flow path 3 inner guide 3a outer vane 3b middle vane 3c inner vane 3d, 3e annular flow path 4 net 50 Duct 51 connector

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masahiro Inoue 4-1-1-13 Honcho, Chuo-ku, Osaka-shi Inside Takenaka Corporation Osaka Main Store (72) Inventor Yukio Kuno 1034 Wada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture -4 Inside Kyoritsu Airtech Co., Ltd. (72) Inventor Takeshi Ueno 1034-4 Osada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture Inside (72) Kenichi Nakajima 1034-4, Wada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture Inside Kyoritsu Airtech Co., Ltd.

Claims (7)

[Claims] 1. A cylindrical outer guide having an upper end connected to an air supply flow path such as a duct and having a flow path axis substantially in a vertical posture, and a cylindrical outer guide disposed inside the lower end of the outer guide together with the outer guide. An inner guide that divides the internal flow passage into at least two or more annular flow passages, wherein the air flow from the annular flow passage created by the outer guide is directed from the lower end peripheral edge of the outer guide in a substantially horizontal direction. An air outlet for air conditioning equipment having a flow path configuration that can be formed. 2. The air outlet for an air conditioner according to claim 1, wherein the outer guide has a flow path creation surface from the upstream to the downstream as a profile formed by a downwardly convex curve and a substantially horizontal line connected thereto. 3. A flow path capable of forming a horizontal air flow line is formed at the lower end of the outer guide so as to expand in a skirt shape, and has a lower end outer peripheral edge having a substantially horizontal development surface. 2. The air conditioner according to claim 1, further comprising an outer vane of an inner guide forming an annular flow path, wherein the outer vane has a cross-sectional shape substantially following the bell, and has a lower end arranged below a horizontal development surface of the bell. Equipment outlet. 4. The bell has a tilt angle in the range of 10 ° upward or downward with respect to a horizontal plane, respectively.
The outlet for air conditioning equipment as described. 5. The inner guide according to claim 3, wherein at least one or more vanes having a cross-sectional shape substantially following the outer vane are coaxially arranged, and lower ends of these vanes are arranged above the outer vane. Air outlet for air conditioning equipment. 6. The air-conditioning equipment outlet according to claim 5, further comprising a resistance mechanism for providing a flow resistance to the air flow at the flow path inlet of the vane having the smallest diameter disposed at the center of the inner guide. 7. The air-conditioning equipment outlet according to claim 6, wherein the resistance mechanism is a net that interferes with the flowing air, and the net is developed at a flow path inlet of the vane.