JPH07167487A - Outlet of air conditioner embedded in ceiling - Google Patents

Abstract

PURPOSE:To clear from the supply of air a current flowing in contact with the ceiling sideways and keep the supply from impinging upon the occupant by designing the outlet in a manner in which its inside surface on the outer side in a longitudinal section is formed in a plane down to the lower end forming an edge and with an inclination making a prescribed actuate angle to a horizontal plane. CONSTITUTION:The outer-side edge surface 4a of an outlet 4 is composed of a plane surface 4d having its lower end at Point A, a plane surface 4b forming the uppermost part, and a cylindrical surface 4c which is between the surface 4d and 4b and joins the two plane surfaces and is designed to lessen the resistance to the flow of air. The plane surface 4d and an outside surface 8a having an edge close to a ceiling panel 8 meet at Point A and form an adge. In a horizontal blowout the current of air blown out separates at the lowermost end Point A of the outlet 4 and, also guided by the plane surface 4d at the end of the outlet 4, in part spreads obliquely downward with deceleration in velocity of the flow. As a result, the air flowing close to the ceiling is reduced in amount. Therefore, the ceiling keeps clean and, since the downward flow slows down in velocity, the occupant becomes less sensitive to the presence of a draft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air outlet of an air conditioner such as a ceiling embedded type.

[0002]

2. Description of the Related Art An example of a vertical section of a conventional ceiling-embedded air conditioner is shown in FIGS. Inside the cabinet 1 embedded in the ceiling 100, a heat exchanger 7, a drain pan 10, a motor 5, a blower 6, a baffle plate 12 and the like are incorporated. A ceiling panel 8 is attached to a lower opening of the cabinet 1, and a suction port 3 is formed in a central portion thereof. The ceiling panel 8 is provided adjacent to the suction port 3 and outside thereof.
A rectangular outlet 4 is formed along each edge of the. The cabinet 1 is composed of a case body 2 formed by molding a metal plate, and an insulation 15 integrally formed of styrofoam for heat insulation, dew condensation prevention, soundproofing, etc. on both sides of the case body 2 using this as an insert sheet metal. Regarding molding, Japanese Patent Application No. 3-11088 is proposed).

During operation of this air conditioner, refrigerant from an outdoor unit (not shown) circulates in the heat exchanger 7, and the motor 5 drives the blower 6. Then, the indoor air in the chamber 9 passes through the suction port 3, the suction grill 11 and the filter 13, is guided by the baffle plate 12 and is sucked into the blower 6 to be urged. Then, in the process of passing through the heat exchanger 7, the air is cooled or heated to become conditioned air, which is guided from the outlet 4 to the outlet louver 14 and blown into the chamber 9.

FIG. 5 is an enlarged view of the air outlet 4. The outer edge surface 4a of the air outlet 4 is composed of a flat surface 4b and a cylindrical surface 4c from the top, and the outer edge 8 of the ceiling panel 8 is at the lowermost point A.
Connects smoothly with a.

A surface (D) from the design surface to the lowermost point C of the inner edge surface of the outlet 4 to the edge D point of the ceiling panel 8
The -AC plane) is a cylindrical surface having a large radius close to a straight line as shown in FIG.

A blowing louver 14 for adjusting the direction of the blowing air up and down is rotatably mounted at substantially the center of the blowing port 4 with a point B as a fulcrum.

It is possible to set at four positions of NO1 to NO4, and NO1 is the most downward blowing direction, N
O2 and NO3 are sequentially directed upward, and NO4 is the most horizontal blowing.

[0008]

The air outlet of the conventional ceiling-embedded air conditioner has the following problems to be solved.

That is, in the conventional shape of the air outlet 4, in order to prevent the blown air current from directly hitting a person in the room (hereinafter, referred to as "draft prevention"), an angle close to horizontal (NO3 and NO4 in FIG. 5). When the air is blown out at the position of the blow-out louver 14, the Coanda effect (Note) causes the blown air flow to adhere and flow along the surface of the ceiling 100 around the air conditioner. If the heat insulation is insufficient, there is a problem that dew condensation causes stains or molds on the surface of the ceiling 100 (see FIG. 6 (side sectional view of blowout air distribution diagram of conventional example)).

Further, if the blowing angle of the airflow is lowered to the point where the airflow does not adhere to the ceiling surface (NO1, N in FIG. 5).
There is a problem that the draft prevention effect cannot be obtained because the airflow having a high flow velocity blows downward. (Note): As shown in Fig. 7, when the wall surface downstream of the nozzle outlet is convex (cylindrical surface in the figure), the jet flow does not go straight and flows along the wall over a long range of the convex surface. (Coanda effect).

In order to solve the above problems, the present invention eliminates a blowout flow that adheres to a ceiling surface and flows laterally (horizontally), and furthermore, a ceiling-embedded air conditioner in which the blowout flow does not directly hit a person in a room. The purpose is to provide an air outlet for the machine.

[0012]

As a means for solving the above problems, the present invention is to provide an air outlet for a ceiling-embedded air conditioner as described in (1) and (2) below. .

(1). A ceiling-embedded air conditioner in which a ceiling panel covering a lower opening of a main body embedded in a ceiling is provided with an intake port for indoor air and an outlet for blowing out conditioned air cooled or heated inside the main body into the room. In the air outlet of the machine, the edge surface reaching the lowermost end of the outer edge surface of the air outlet in the vertical cross section of the ceiling-embedded air conditioner is a flat surface to form an edge portion and an inclination angle formed by the horizontal surface of the flat surface. The air outlet of a ceiling-embedded air conditioner characterized in that the angle is set to a predetermined acute angle.

(2). In the air outlet of the ceiling-embedded air conditioner described in (1), the inclination angle is 50 ° ± 1.
An air outlet of a ceiling-embedded air conditioner characterized by being set at 0 °.

[0015]

Since the present invention is constructed as described above, it has the following actions.

(1). In the configuration of (1) above, the edge surface of the outer edge surface of the outlet of the ceiling-embedded air conditioner to the lowermost end is a flat surface, the boundary with the outer surface is an edge, and the angle of inclination with the horizontal plane is set. Is set to a predetermined acute angle, the air flow blown down along the plane of the edge surface is separated from the ceiling surface by the edge, and becomes an oblique downward flow due to the acute angle and does not directly contact a person.

That is, although the flow adhering to the ceiling is prevented, it does not become a high-speed downward flow and is blown out with an appropriate spread in an obliquely downward direction, so that a draft is not produced in combination with a decrease in flow velocity. Does not make people uncomfortable.

(2). In the configuration of (2) above, since the inclination angle of the edge surface of the configuration of (1) above is set to 50 ° ± 10 °, a diagonal downward blowing with a strong horizontal component that does not cause the most discomfort to a person is achieved. On the other hand, an indoor blowout flow can be obtained without any fear of forming an adhering flow to the ceiling.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second aspects according to claims 1 and 2 of the present invention
An embodiment will be described with reference to FIGS. It should be noted that the same members and functional members as those of the conventional example or the previous embodiment are denoted by the same reference numerals as much as possible, and the description thereof will be omitted unless necessary. Further, the first embodiment is an example in which the lower surface of the air outlet is a horizontal surface, and the second embodiment is a conventional example in which the existing lower surface is a gentle cylindrical surface, and there is no particular difference between them. , Second
The examples will be described together in parallel. Since the difference between the cylindrical surface and the flat surface on the outer edge surface of the outlet is a slight difference visually, it is drawn out imitating the dimension line and calling within the range indicated by the arrow. 1 is a longitudinal sectional view of the vicinity of the right side of the first embodiment, and FIG. 2 is a longitudinal sectional view of the vicinity of the right side of the second embodiment.
FIG. 3 is a schematic side sectional view showing the distribution of blown air during cooling in the first and second embodiments.

In FIG. 1 and FIG. 2, the outer edge surface 4a of the outlet 4 is a flat surface 4d at the lowermost point A, and a flat surface 4b having the same length as the conventional example at the uppermost edge surface between them. Are connected by a cylindrical surface 4c in order to reduce the resistance of the air flow. Then, the outer surface 8a of the peripheral edge of the ceiling panel 8 and the flat surface 4d intersect at a point A to form an edge. And
The plane 4 reaching the lowermost point A of the outer edge surface 4a of the air outlet 4
The inclination angle θ of d with respect to the horizontal plane is 50 ° ± 10 °. In FIG. 1, the lower surface (AC surface) of the outlet 4 is a horizontal surface,
The first embodiment in which the length of the flat surface 4b is the same as that of the conventional example and the required length of the flat surface 4d is secured, FIG. 2 has the same ceiling panel design as that of the conventional example, and the lowermost end of the inner edge surface of the air outlet 4 is shown. The lower surface (D-A-C surface) from the ceiling to the edge of the ceiling panel 8 is a cylindrical surface having a large radius close to a straight line as in the conventional example, and the length of the plane 4b is made shorter than that of the conventional example. Four
This is a second embodiment in which the required length of d is secured (thus, in the second embodiment, there is a slight difference between the lower surface and the horizontal surface as shown in the figure).

Other structures are the same as those of the conventional example shown in FIGS. 4 and 5, and corresponding members are designated by the same reference numerals.

Next, the operation of the above configuration will be described.

Even in the horizontal blowing (the position of the blowing louver 14 is NO4), the blowing air flow is separated at the lowest point A of the blowing port 4 as shown in FIG. 3 and is guided to the flat surface 4d of the blowing port 4. As a result, the flow velocity decreases as it spreads out diagonally downward. As a result, the flow rate of air that flows closer to the ceiling surface decreases (the conventional air outlet does not spread obliquely downward as shown in FIG. 6, but becomes a narrow layer attached to the ceiling surface and is almost horizontal. Spread).

Therefore, the ceiling surface is not soiled and the downward flow velocity is also reduced, so that a draft feeling is not felt.

The inclination angle θ of the plane 4d with respect to the horizontal plane
Is larger than 50 ° ± 10 °, even if the position of the blowout louver 14 is horizontal NO4, the blowout airflow does not flow in the horizontal direction, and the function of the blowout louver 14 is lost. On the other hand, if it is smaller than 50 ° ± 10 °, peeling at the outlet of the air outlet is reduced and the effect is reduced.

That is, the inclination angle θ of 50 ° ± 10 ° is a practical upper limit that can maintain the blowout flow in the horizontal direction and a practical lower limit that can eliminate the adhering flow to the ceiling surface. It is a characteristic angle of the above-mentioned embodiment, which is confirmed to have an important meaning in practical use.

As described above, according to the first and second embodiments,
Outer edge 4a of the air outlet 4 of the ceiling-embedded air conditioner
Since the lower end side of the flat surface is a flat surface 4d and the inclination angle is 50 ° ± 10 ° with respect to the horizontal surface, even if the blowout louver 14 is in the NO4 state, the blown air is the ceiling surface. Therefore, there is an advantage in that it does not flow onto the ceiling surface and thus does not cause a problem such as dew condensation on the ceiling surface to cause stains or mold.

Further, since there is no concern that an adhered flow to the ceiling will occur, when draft prevention is desired, the blowout louver 14 can be freely brought close to a horizontal blowout to obtain a comfortable air conditioning in which blown air does not directly hit the body. There is an advantage.

Although the plane 4d has an inclination angle of 50 ° ± 10 ° in the above embodiment, the present invention is not limited to this, and any angle may be adopted as long as it is an acute angle. .

[0030]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, the edge surface reaching the lowermost end of the outer edge surface of the air outlet is formed into a flat surface to form an edge portion with the outer surface of the side edge of the air outlet grill, and the flat surface is formed. The angle of inclination with respect to the horizontal plane is acute or 50 ° ± 10
Since it is set to °, the blowoff air flow is separated at the outlet of the blowout port and is guided to the above-mentioned inclined plane, so it also spreads diagonally downward and the flow velocity decreases, so the air flow rate that adheres to or approaches the ceiling surface also decreases. To do.

Therefore, the ceiling surface is not soiled and the flow velocity of the downward airflow is reduced, so that the draft feeling is not felt.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view of the vicinity of the right side of the first embodiment of the present invention,

FIG. 2 is a partial vertical sectional view of the vicinity of the right side of the second embodiment of the present invention,

FIG. 3 is a schematic side sectional view showing the distribution of blown air during cooling in the first and second embodiments,

FIG. 4 is a vertical sectional view of a conventional ceiling-embedded air conditioner,

FIG. 5 is an enlarged view (of the outlet) near the lower right of FIG. 4 of a conventional example,

FIG. 6 is a schematic side sectional view showing a distribution of blown air during cooling in a conventional example.

FIG. 7 is an explanatory diagram of a Coanda effect according to a conventional example.

[Explanation of symbols]

 4 Outlet 4a Outer edge 4d Flat 8 Ceiling panel 8a Outer surface

Claims (2)

[Claims] 1. A ceiling panel which covers a lower opening of a main body embedded in the ceiling, and which is provided with a suction port for indoor air and an outlet for blowing out conditioned air cooled or heated in the main body into the room. In the outlet of the embedded air conditioner, the edge surface reaching the lower end of the outer edge surface of the outlet in the vertical cross section of the ceiling embedded air conditioner is a flat surface to form an edge portion and the horizontal surface of the flat surface. An air outlet of a ceiling-embedded air conditioner, characterized in that a slant angle formed by and is set to a predetermined acute angle. 2. The air outlet of the ceiling-embedded air conditioner according to claim 1, wherein the inclination angle is 50 ° ± 10 °. .