JP2016180513A - Ceiling embedded type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling embedded type air conditioner which enables increase of the air quantity in an air outlet port and also enables increase of the wind speed to improve short circuit prevention effect.SOLUTION: A ceiling embedded type air conditioner has: a suction grille 120 which is provided with an air suction port 130 and disposed at a lower surface center of a housing 10; and a decorative panel 80 which is provided with an air outlet port 90 and disposed so as to be positioned around the suction grille 120. The decorative panel 80 includes an inner frame part 81 and an outer frame part 82 which enclose the air outlet port 90. A rib 82a3 with a tip protruding in a direction of the air outlet port 90 is provided along a direction perpendicular to an air flow direction of the air outlet port 90 at an upper end of a vertical surface part 82a1 of an inner wall 82a of the outer frame part 82.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ceiling-embedded air conditioner that is installed by being embedded in an indoor ceiling.

  The ceiling-embedded air conditioner 200 is generally configured as shown in FIGS. 2 to 5 (for example, Patent Document 1). Reference numeral 10 denotes a rectangular parallelepiped housing made of sheet metal, the upper surface portion being closed by the upper plate 11, the left and right front and rear being closed by the side plate 12, and the lower surface portion being opened. The casing 10 has a heat insulating material 20 attached to the inside thereof, and a hook 30 attached to the outside of the side plate 12 is suspended from a ceiling beam or the like by a hanging metal fitting. A motor 40 is attached to the inside of the upper plate 11 of the housing 10, and a turbo fan 50 is coupled to an output shaft 41 of the motor 40. Reference numeral 60 denotes a tubular heat exchanger having a square shape when viewed from the upper surface, and reference numeral 70 denotes a drain pan that receives dew condensation water generated in the heat exchanger 60. Reference numeral 80 denotes a decorative panel, and a total of four air outlets 90 are provided independently on each side as shown in FIGS. 100 is a bell mouth for guiding the intake air to the turbofan 50, 110 is a filter, 120 is an intake grille provided with an air intake port 130, and 140 is a wind direction adjusting plate for adjusting the direction of the blown air. Reference numeral 150 denotes a ceiling plate to which the ceiling-embedded air conditioner 200 is attached.

  The air outlet 90 of the decorative panel 80 has a rectangular shape when viewed from the lower surface, the inner long side becomes the inner frame portion 81 on the side where the suction grill 120 is attached, and the outer long side is attached to the side wall 12 of the housing 10. This is the outer frame portion 82 on the side to be mounted.

  As shown in FIG. 5, the inner wall 81 a facing the air outlet 90 of the inner frame portion 81 is formed with a curved surface portion 81 a 1 with a lower portion protruding outward. Further, a vertical surface portion 82a1 is formed on the upper portion of the inner wall 82a facing the air outlet 90 of the outer frame portion 82, and a protruding curved surface portion 82a2 that is bent outward so as to be continuous with the vertical surface portion 81a1 is formed on the lower portion. ing.

  In the ceiling-embedded air conditioner 200, the indoor air sucked by the turbo fan 50 from the air suction port 130 of the suction grill 120 passes from the inside to the outside of the heat exchanger 60 to exchange heat with the refrigerant. The path is bent 90 degrees downward at the portion of the heat insulating material 20 inside the side plate 12 of the housing 10 and blown out into the room from the air outlet 90 of the decorative panel 80. At this time, the air blowing direction can be adjusted by adjusting the direction of the wind direction adjusting plate 140.

  At the air outlet 90, the blown air is blown out by bending the course in the outward direction by the curved surface portion 81 a of the inner frame portion 81 of the decorative panel 80. Further, the blown air is guided outward by the projecting curved surface portion 82b of the outer frame portion 82 at the time of the blowing. Therefore, the air blown out from the air blowout port 90 is blown out in the direction opposite to the air suction port 130, and so-called short circuit in which the blown air returns to the air suction port 100 is prevented.

JP 2001-194000 A

  However, if the space between the curved surface portion 81a1 of the inner frame portion 81 of the decorative panel 80 and the vertical surface portion 82a1 and the projecting curved surface portion 82a2 of the outer frame portion 82 is increased to increase the cross-sectional area of the air outlet 90, the ventilation resistance is increased. However, the effect of guiding the wind to the outside by the inner frame portion 81 and the outer frame panel 82 is reduced, and the effect of preventing a short circuit becomes insufficient. It was.

  An object of the present invention is to provide a ceiling-embedded air conditioner capable of realizing an increase in the air volume at the air outlet and improving the wind speed to increase the short circuit prevention effect.

  In order to achieve the above object, the invention according to claim 1 is characterized in that an air inlet is provided and an intake grill disposed at the center of the lower surface of the housing, and an air outlet is provided and is located around the inlet grill. A decorative panel disposed in a ceiling-embedded air conditioner having an inner frame portion surrounding the air outlet and an outer frame portion, and the inner wall of the outer frame portion, A rib having a shape whose tip protrudes in the direction of the air outlet is provided along a direction orthogonal to the air flow direction of the air outlet.

  The invention according to claim 2 is the ceiling-embedded air conditioner according to claim 1, wherein the rib is integrally formed on an upper portion of the inner wall of the outer frame portion of the decorative panel. To do.

  The invention according to claim 3 is the ceiling-embedded air conditioner according to claim 2, wherein a distance between the tip of the rib and an upper end of the inner wall of the inner frame portion is the height of the inner frame portion. It is set shorter than the space | interval between the lower end of an inner wall and the lower end of the said inner wall of the said outer frame part, It is characterized by the above-mentioned.

  According to the present invention, even when the air volume is increased by increasing the cross-sectional area of the air outlet, the rib provided on the inner wall of the outer frame portion of the decorative panel functions as a throttle of the air outlet. The wind speed at the aperture can be increased. In particular, in the present invention, since the rib is provided on the inner wall of the outer frame portion that forms a part of the air outlet of the decorative panel, the effect of increasing the wind speed of the blown air is increased. Thereby, the air blown out from the air outlet is blown away in a direction away from the suction grille, and the occurrence of a short circuit is effectively prevented. In addition, by forming the ribs integrally with the decorative panel, the ribs are not displaced and can be easily formed, and the rigidity of the decorative panel can be increased.

It is the elements on larger scale near the air outlet of the ceiling-embedded air conditioner of the present invention. It is a perspective view of the conventional ceiling-embedded air conditioner. It is a bottom view of the conventional ceiling-embedded air conditioner. It is sectional drawing of the conventional ceiling embedded type air conditioner. It is the elements on larger scale near the air outlet of the conventional ceiling-embedded air conditioner.

  FIG. 1 is a partially enlarged view of the vicinity of an air outlet of a ceiling-embedded air conditioner according to an embodiment of the present invention. The difference between the present embodiment and the conventional example described with reference to FIGS. 2 to 5 is that the upper end of the vertical surface portion 82a1 of the upper portion of the inner wall 82a of the outer frame portion 82 of the decorative panel 80 constituting a part of the periphery of the air outlet 90. In addition, the rib 82a3 having a shape whose tip protrudes in the direction of the air outlet 90 extends from one end to the other end along the direction orthogonal to the flow direction of the air passing through the air outlet 90. It is the point formed integrally.

  The distance A between the tip of the rib 82a3 and the upper end 81a3 of the inner wall 81a of the inner frame 81 is such that the projecting curved surface 82a2 of the inner wall 82a of the outer frame panel 82 and the lower end 81a2 of the inner wall 81a of the inner frame 81 The protruding length of the rib 82a3 from the vertical surface portion 82a1 is set to 5 mm, for example, so that A <B with respect to the distance B between the two.

  Thus, if the rib 82a3 is provided and set so that A <B, the rib 82a3 serves as a throttle of the air outlet 90 and is transmitted through the heat insulating material 20 inside the side plate 12 of the housing 10 to the air. The air flowing in the direction of the blowout port 90 is drawn inward at the rib 82a3.

  As a result, even when the cross-sectional area of the air outlet 90 is increased to increase the air volume, the flow velocity of the air flowing along the vertical surface portion 82a1 and the projecting curved surface portion 82a2 of the outer frame portion 82 is curved in the inner frame portion 81. Since the flow velocity of air flowing along the surface portion 81a1 is higher than that of the inner frame portion 81, the air flow on the inner frame portion 81 side is drawn by the Counder effect due to the flow on the outer frame portion 82 side. Air flows away from the air inlet 130.

  Therefore, no air flows back to the air suction port 130, and the occurrence of a short circuit can be effectively prevented.

DESCRIPTION OF SYMBOLS 10: Housing | casing, 11: Upper board, 12: Side board 20: Heat insulating material 30: Hook 40: Motor, 41: Output shaft 50: Turbo fan 60: Heat exchanger 70: Drain pan 80: Cosmetic panel, 81: Inner frame part , 81a: inner wall, 81a1: curved surface portion, 81a2: lower end, 81a3: upper end, 82: outer frame portion, 82a: inner wall, 82a1: vertical surface portion, 82a2: projecting curved surface portion, 82a3: rib 90: air outlet 100: bell Mouse 110: Filter 120: Suction grill 130: Air inlet 140: Wind direction adjusting plate 150: Ceiling plate

Claims (3)

An intake grill provided with an air inlet and disposed in the center of the lower surface of the housing; and a decorative panel provided with an air outlet and disposed around the suction grill, the decorative panel comprising: In the ceiling-embedded air conditioner provided with an inner frame portion and an outer frame portion surrounding the air outlet,
The ceiling wall is characterized in that a rib having a shape whose tip protrudes in the direction of the air outlet is provided on the inner wall of the outer frame portion along a direction orthogonal to the air flow direction of the air outlet. Built-in air conditioner. The ceiling-embedded air conditioner according to claim 1,
The rib is integrally formed on the upper part of the inner wall of the outer frame portion of the decorative panel. The ceiling-embedded air conditioner according to claim 2,
The interval between the tip of the rib and the upper end of the inner wall of the inner frame portion is set shorter than the interval between the lower end of the inner wall of the inner frame portion and the lower end of the inner wall of the outer frame portion. A ceiling-embedded air conditioner characterized by

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