JP2009014330A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner having a blow-out opening capable of preventing dew condensation on a ceiling surface and smudging accompanying this with a simple and inexpensive configuration. <P>SOLUTION: An outer wall part 9b of the blow-out port 9 is provided with a throttling channel Y for blowing out a part of blowing air flow from the blow-out port 9 flowing near the outer wall part 9b in a throttled state to a direction approximately in parallel with the ceiling surface 20. The blow-out air flow blown out from the blow-out port 9 side via the throttling channel Y to the direction approximately in parallel with the ceiling surface 20 is liable to remain/stay along the ceiling surface 20 and its proximity, as the air flow has a small flow rate and flows at low speed. The presence of the remaining/staying air suppresses generation of negative pressure in an area near the ceiling surface 20. Accordingly, the blow-out air flow from the blow-out port 9 with a large amount of and high-speed flow rate flows below the remaining/staying air in a state of being prevented by the remaining/staying air without deflecting to the ceiling surface 20 side, which suppresses mixing of indoor air near the ceiling surface 20 as much as possible. As a result, the dew condensation on the ceiling surface 20 and the smudging accompanying this can be effectively prevented, and improvement of commercial value of the air conditioner can be expected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure of an air outlet in an indoor unit of a ceiling-embedded air conditioner.

  In the indoor unit of the ceiling-embedded air conditioner, since air is blown out from the outer peripheral portion of the decorative panel attached to the lower surface side of the ceiling surface 20 to the indoor side, particularly during cooling operation From the viewpoint of preventing the cold air from directly hitting the indoor occupant and giving a draft feeling, the air blowing direction from the air outlet is deflected as close to the ceiling surface 20 as possible (see, for example, Patent Document 1). .

  However, from the standpoint of preventing drafting, if the air blowing direction from the air outlet is brought close to the ceiling surface, indoor air near the ceiling surface is entrained in the air and causes condensation, which may cause smudging. Is done.

  From the viewpoint of suppressing the occurrence of dew condensation and smudging on the ceiling surface, for example, Patent Document 2 includes a deflecting plate as a blowout port, and from the outer periphery of the decorative panel in addition to the normal first blowout port. A second air outlet that blows out to the side is provided. When the cooling load is high, where condensation and smudging are likely to occur, cool air is blown out from the first air outlet, and when the cooling load becomes low due to a decrease in the room temperature, A technique has been proposed in which cool air is blown out from the outlet, thereby suppressing the occurrence of condensation and smudging.

  Further, in Patent Document 3, from the viewpoint of suppressing the smudging phenomenon of the ceiling surface, a protrusion-shaped guide is provided on the outer wall surface of the air outlet, and the airflow flowing along the outer wall surface is given a peeling action by the Coanda effect. A technique for suppressing the approach of the ceiling to the ceiling side has been proposed.

  Japanese Patent Laid-Open No. 08-1000094   JP 2006-336916 A   Japanese Patent Laid-Open No. 08-094160

  However, the one disclosed in Patent Document 2 requires the opening / closing mechanism of the second outlet, which causes a problem that the structure becomes complicated and the number of parts increases.

  Further, when the second air outlet is opened and the cold air is blown out from the second air outlet, the first air outlet is blocked by the wind direction deflecting plate, and the entire cool air is blown out in the direction along the ceiling surface. Therefore, no matter how much the temperature difference between the blown air and the air on the ceiling surface side is small, there is a concern that the surrounding indoor air is caught in the blown air with a high flow rate and a high flow velocity, and a smudge phenomenon may occur. Is done.

  On the other hand, in the thing shown by patent document 3, it peels on the airflow which flows along this outer wall surface by the projection-shaped guide provided in the outer wall surface of a blower outlet, and suppresses this airflow flowing along a ceiling surface However, if this is reversed, the area along the ceiling surface will become negative pressure. As a result, the airflow from the air outlet will be turbulent in this area, and the air near the ceiling surface will be There is a concern that it may involve and induce a smudge phenomenon.

  Accordingly, the present invention has been made for the purpose of providing an air conditioner having a blow-out structure that can effectively prevent condensation on the ceiling surface and accompanying smudging with a simple and inexpensive configuration. Is.

  The present invention employs the following configuration in order to solve the above problems.

  In the first invention of the present application, the indoor unit main body X embedded in the opening of the ceiling surface 20 is attached so as to cover the opening on the lower surface side of the indoor unit main body X, and suction is provided in the central portion thereof. In the air conditioner configured to include the decorative panel 2 in which the outlet 8 is provided with the air outlet 9 on the outer peripheral portion, the air flow from the air outlet 9 is blown to the outer wall portion 9b of the air outlet 9. Among them, a throttle flow path Y is provided that blows out part of the blown airflow flowing near the outer wall portion 9b in a throttled state in a direction substantially parallel to the ceiling surface 20.

  In the second invention of the present application, in the air conditioner according to the first invention, a plurality of slit grooves 15 in which the throttle channel Y is formed by cutting the outer wall portion 9b of the air outlet 9 from the surface side thereof. It is characterized by comprising.

  In the third invention of the present application, in the air conditioner according to the first invention, the throttle channel Y is provided on a plurality of curved plate members 11 that form the surface portion of the outer wall portion 9b of the air outlet 9. It is characterized by comprising through-holes 16.

  In the present invention, the following effects can be obtained.

(A) According to the air conditioner pertaining to the first invention of the present application, the blowout airflow that flows near the outer wall portion 9b out of the blowout airflow from the blowout port 9 to the outer wall portion 9b of the blowout port 9. Since the throttle channel Y that blows a part in the throttled state in a direction substantially parallel to the ceiling surface 20 is provided, it passes through the throttle channel Y from the outlet 9 side and is substantially parallel to the ceiling surface 20. Since the blown airflow blown in the direction has a small flow rate and a low flow velocity, it tends to stay in the vicinity along the ceiling surface 20, so that the presence of the staying air makes negative pressure in the region near the ceiling surface 20. Is suppressed. Therefore, a large flow rate and a high flow rate air flow from the outlet 9 is blocked by the staying air layer, and flows below the staying air layer without being deflected to the ceiling surface 20 side. Entrainment of room air near the ceiling surface 20 is suppressed as much as possible. As a result, dew condensation on the ceiling surface 20 and smuggling associated therewith can be effectively prevented, and as a result, improvement in the commercial value of the air conditioner can be expected.

Moreover, since the throttle flow path Y is provided on the outer wall portion 9b side of the blower outlet 9, the flow rate of the blown airflow passing through the throttle flow path Y is equal to that of the blown airflow from the blower outlet 9. The airflow increases as the cooling operation in which the wind direction is deflected toward the ceiling surface 20 side. Therefore, the flow rate of the blown airflow corresponds to the degree of dew condensation and smudge suppression, and the dew condensation and smudge suppression action by the blown airflow can be obtained more effectively.
And since the said effect is automatically acquired following the change of the wind direction of the blowing airflow from the said outlet 9, without requiring any switching operation, the operativity and operativity of an air conditioner are improved. This is also useful.

  (B) According to the air conditioner pertaining to the second aspect of the present invention, in the air conditioner pertaining to the first aspect of the present invention, the throttle channel Y and the outer wall portion 9b of the outlet 9 are on the surface side. Therefore, the effect described in (a) above can be achieved without requiring any special member or the like only by changing the shape of the air outlet 9 portion. It is possible to obtain an air conditioner having high dew condensation on the ceiling surface 20 and a high smuggling suppressing effect associated therewith at a lower cost.

  (C) According to the air conditioner pertaining to the third invention of the present application, a large number of through holes provided in the curved plate member 11 that forms the surface portion of the outer wall portion 9b of the blowout port 9 in the throttle channel Y. 16, the effect described in (a) can be obtained with a simple configuration in which the curved plate material 11 is provided on the surface portion of the outer wall portion 9 b of the air outlet 9. It is possible to provide an air conditioner with high dew condensation on the surface 20 and a high smudge suppression effect associated therewith at a lower cost.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

I: 1st Embodiment In FIG.1 and FIG.2, the indoor unit Z1 which comprises the air conditioner which concerns on the 1st Embodiment of this invention is shown. This indoor unit Z1 is a ceiling-embedded indoor unit, and is arranged on the lower surface side of the conditioner main body X, which is arranged in a state embedded in the back of the ceiling through an opening 21 provided in the ceiling surface 20. It is provided with a decorative panel 2 to be attached.

  The harmonic machine main body X has a bell mouth 5, a fan 3, and a motor 4 that rotationally drives the fan 3 coaxially arranged in the vertical direction at the center in a rectangular box-shaped casing 1 having an open bottom surface. A heat exchanger 6 is arranged on the outer peripheral side of the bell mouth 5 and the fan 3 so as to surround them.

  The decorative panel 2 is composed of a panel body having a substantially rectangular planar shape corresponding to the shape of the lower surface of the casing 1, and its central portion is a suction port 8, in which a suction grill 7 is detachable. Installed. Further, on the outer peripheral side of the decorative panel 2, air outlets 9 are formed that extend linearly along each side of the rectangle so as to surround the suction port 8 from the outside in the planar direction. The decorative panel 2 is abutted and fixed from the lower surface side of the ceiling surface 20 to the harmonic machine main body X so as to close the lower surface opening thereof. In the state where the decorative panel 2 is assembled to the harmony machine main body X, the suction port 8 on the decorative panel 2 side faces the suction side of the bell mouth 5 on the harmonic machine main body X side, and the air outlet Reference numeral 9 faces a blow-out passage on the downstream side of the heat exchanger 6.

  On the other hand, the present invention is applied to the air outlet 9 portion of the decorative panel 2. That is, as shown in FIGS. 1 to 3, the air outlet 9 is an opening having an oblong planar shape, and as a whole, from the upper side (that is, the conditioner body X side) to the lower side (that is, the chamber). It has a cross-sectional shape that gradually displaces while curving outward from the center of the indoor unit as it goes inward. The curved cross section is composed of an inner wall surface 9a and an outer wall surface 9b that are opposed to each other with a predetermined interval, and a deflection plate 12 is disposed in the middle of these opposed intervals.

  Here, in this embodiment, the air outlet 9 is cut into the outer wall surface 9b side of the air outlet 9 by a predetermined depth upward from the lower surface 2a side of the decorative panel 2 and extends outward from the air outlet 9 in the planar direction. A plurality of slit grooves 15 having a small width extending in a straight line are arranged in a row at predetermined intervals in the longitudinal direction of the air outlet 9 (that is, the side direction of the decorative panel 2). Due to the large number of slit grooves 15, a “throttle channel Y” is formed in the claims.

  In the indoor unit Z1 configured as described above, the indoor air sucked from the suction port 8 as shown in FIG. 1 along with the operation of the indoor unit Z1 is heat-exchanged in the heat exchanger 6, and warm air The air is blown out from the outlet 9 to the room side as (air-heating operation) or cold air (air-cooling operation), thereby heating or cooling the room. At this time, the deflection plate 12 provided at the air outlet 9 has a large inclination angle with respect to the horizontal line so as to change the air flow to the lower side during the heating operation (indicated by the chain line in FIG. 3), and the air flow during the air cooling operation. Is tilted to the ceiling surface 20 side so that the inclination angle with respect to the horizontal line is reduced (the solid line shown in FIG. 3).

  In the state shown by the solid line in FIG. 3, the main flow of the blown airflow from the blowout port 9 is directed slightly diagonally downward while being guided by the deflecting plate 12 in the blowout port 9 as shown by the streamline A1. (Hereinafter, this is referred to as “main blowing airflow A1”). On the other hand, among the blown airflow, the blown airflow that flows near the outer wall portion 9b of the blowout port 9 is in a constricted state in the slit grooves 15 provided in the outer wall portion 9b as indicated by the streamline A2. And is blown out at an angle close to horizontal so as to follow the ceiling surface 20 (hereinafter referred to as “sub-blowing airflow A2”).

  As described above, the air flow from the air outlet 9 is blown out in the state of being vertically divided into the main air flow A1 and the sub airflow A2, and in this case, the sub air blown through the slit groove 15 is blown out. The blown air flow A2 is subjected to a throttling action when it flows into the slit groove 15 from the blowout port 9, so that the flow rate is low and the flow rate is low. Therefore, the blown airflow A2 stays in the vicinity along the ceiling surface 20. The presence of this stagnant air suppresses negative pressure in the region near the ceiling surface 20.

  Accordingly, the main airflow A1 blown out at a high flow rate and a high flow rate from the air outlet 9 is prevented from being deflected toward the ceiling surface 20 by the staying air layer formed by the sub-airflow A2. It will be in a state and will flow under a staying air layer, without deflecting to the ceiling surface 20 side. As a result, room air in the vicinity of the ceiling surface 20 is restrained as much as possible in the main blown airflow A1, and condensation on the ceiling surface 20 and associated smudging are effectively prevented. .

  Further, since the slit groove 15 is provided on the outer wall portion 9b side of the air outlet 9, the flow rate of the auxiliary air flow A2 passing through the slit groove 15 is equal to that of the air flow from the air outlet 9. The airflow increases as the cooling operation is deflected toward the ceiling surface 20. Therefore, the flow rate of the blown airflow corresponds to the degree of dew condensation and smudge suppression, and the dew condensation and smudge suppression action by the sub blown airflow A2 can be obtained more effectively.

  And since the said effect is automatically acquired following the change of the wind direction of the blowing airflow from the said outlet 9, without requiring any switching operation, the operativity and operativity of an air conditioner are improved. This is also useful.

  Furthermore, since the slit groove 15 is formed by cutting the outer wall portion 9b of the air outlet 9 from its surface side, any dedicated member or the like can be obtained only by changing the shape of the air outlet 9 portion. Therefore, it is possible to provide the air conditioner with high dew condensation on the ceiling surface 20 and a high smudge suppression effect associated therewith at a lower cost.

II: Second Embodiment FIGS. 4 and 5 show an indoor unit Z2 constituting an air conditioner according to a second embodiment of the present invention. The indoor unit Z2 is a ceiling-embedded indoor unit, and has the same basic configuration as the indoor unit Z1 according to the first embodiment. This is the configuration of the throttle channel Y provided at the outlet 9.

  That is, in the indoor unit Z1 according to the first embodiment, the throttle channel Y is configured by a number of slit grooves 15, whereas in the indoor unit Z2 of this embodiment, the throttle channel Y is This is a point constituted by a large number of through holes 16.

  Since the configuration other than the configuration of the throttle channel Y and the operational effects obtained thereby are all the same as those of the indoor unit Z1 according to the first embodiment, the members shown in FIGS. 1 to FIG. 3, the same reference numerals are attached, and the corresponding description in the first embodiment is used, and here, the above differences will be mainly described.

  As shown in FIGS. 4 to 6, in this embodiment, the outer wall portion 9 b of the air outlet 9 is constituted by a thin curved plate member 11, and a large number of small-diameter through holes 16 are provided in the curved plate member 11. Thus, the throttle channel Y is constituted by the through holes 16. The back side of the curved plate member 11 is a gap 17 that faces the ceiling surface 20 as it is.

  As described above, according to the indoor unit Z2 according to this embodiment in which the throttle channel Y is configured by the through holes 16, the blown air flow blown out from the outlet 9 in accordance with the operation of the indoor unit Z2. As shown in FIG. 6, the main blown airflow A <b> 1 from the blowout port 9 is blown out slightly diagonally downward while being guided by the deflection plate 12 in the blowout port 9. On the other hand, among the blowing airflows, the sub-blowing airflow A2 flowing near the outer wall portion 9b of the air outlet 9 is in a state in which the through holes 16 provided in the curved plate member 11 constituting the outer wall portion 9b are throttled. And is blown out at an angle close to the horizontal so as to be along the ceiling surface 20.

  As described above, the blown airflow from the blowout port 9 is blown out in the state of being vertically divided into the main blown airflow A1 and the auxiliary blown airflow A2. In this case, the blown airflow is blown out through the through hole 16. The auxiliary airflow A2 is subjected to a throttling action when it flows into the through-hole 16 from the air outlet 9, and thus has a low flow rate and a low flow rate. Therefore, the auxiliary airflow A2 stays in the vicinity along the ceiling surface 20. The presence of this stagnant air suppresses negative pressure in the region near the ceiling surface 20.

  Accordingly, the main airflow A1 blown out at a high flow rate and a high flow rate from the air outlet 9 is prevented from being deflected toward the ceiling surface 20 by the staying air layer formed by the sub airflow A2. It will be in a state and will flow under a staying air layer, without deflecting to the ceiling surface 20 side. As a result, room air in the vicinity of the ceiling surface 20 is restrained as much as possible in the main blown airflow A1, and condensation on the ceiling surface 20 and associated smudging are effectively prevented. .

  Further, the sub-air flow A2 passing through the through-hole 16 is provided on the curved plate member 11 side that constitutes the outer wall portion 9b of the blow-out port 9, so that the flow rate thereof is The airflow from the outlet 9 increases as the cooling operation in which the airflow direction is deflected toward the ceiling surface 20 side. Therefore, the flow rate of the blown airflow corresponds to the degree of dew condensation and smudge suppression, and the dew condensation and smudge suppression action by the sub blown airflow A2 can be obtained more effectively.

  And since the said effect is automatically acquired following the change of the wind direction of the blowing airflow from the said outlet 9, without requiring any switching operation, the operativity and operativity of an air conditioner are improved. This is also useful.

  Furthermore, the effect described in the above (a) can be obtained with a simple configuration in which the through hole 16 is provided in the curved plate member 11, and the air having a high effect of suppressing condensation on the ceiling surface 20 and the accompanying smudge. A harmony machine can be provided at a lower cost.

III: Others (1) In the first and second embodiments, the throttle channel Y (that is, the slit groove 15 in the first embodiment and the through hole 16 in the second embodiment) is connected to the outlet 9. However, the present invention is not limited to this, and in another embodiment, for example, the throttle channel Y is, for example, It can also be provided only at a portion where condensation and smudging are most likely to occur, that is, at a portion near both ends in the width direction of the outlet 9. In the case of such a configuration, a higher dew condensation and smudge suppression effect can be obtained with a simpler configuration.

  (2) In the said 1st Embodiment, although the said slit groove | channel 15 is linearly formed toward the blowing direction from the said blower outlet 9, this invention is not limited to this, For example, The slit groove 15 can be formed only in the portion near the both ends in the width direction of the air outlet 9. In the case of such a configuration, a higher dew condensation and smudge suppression effect can be obtained with a simpler and less expensive configuration.

  (3) In the said 1st and 2nd embodiment, although the said blower outlet 9 was provided about what was provided in the periphery 4 places corresponding to each edge | side of the said decorative panel 2, this invention is limited to the structure which concerns. However, in other embodiments, for example, as shown in FIG. 2 and FIG. 5, the corner portion of the decorative panel 2 is also provided with an air outlet (indicated as 9 ′). You can also.

(4) In the second embodiment, the outer wall 9b of the air outlet 9 is constituted by the curved plate member 11 and the throttle channel Y is constituted by the through hole 16 provided in the curved plate member 11. However, the present invention is not limited to this, and in other embodiments, the outer wall 9b may be formed of a net having a predetermined number of meshes, for example, instead of the curved plate member 11. it can. In such a configuration, the throttle channel Y is configured by the mesh portion of the mesh body, so that the structure of the throttle channel Y is simplified.

  It is sectional drawing of the air conditioner which concerns on 1st Embodiment of this invention.   It is an II-II arrow line view of FIG.   It is an enlarged view of the III section of FIG.   It is sectional drawing of the air conditioner which concerns on 2nd Embodiment of this invention.   It is a VV arrow line view of FIG.   It is an enlarged view of the VI section of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ·· Casing 2 ·· Cosmetic panel 3 · · Fan 4 · · Motor 5 · · Bell mouth 6 · · Heat exchanger 7 · · Suction grill 8 · · Magnetic field sensor 9 · · Air outlet 10 · · Ventilation passage 11 ·・ Curved plate material 12 ・ ・ Deflecting plate 15 ・ ・ Slit groove 16 ・ ・ Through hole 17 ・ ・ Cavity 20 ・ ・ Ceiling surface 21 ・ ・ Opening A ・ ・ Air flow A1 ・ ・ Main air flow A2 ・ ・ Sub air flow X・ ・ Main unit Y ・ ・ Throttling channel Z1 ・ ・ Indoor unit Z2 ・ ・ Indoor unit

Claims (3)

The indoor unit main body (X) embedded in the opening of the ceiling surface (20) and the lower surface side of the indoor unit main body (X) are attached so as to cover the opening, and a suction port ( 8) is an air conditioner configured to include a decorative panel (2) provided with air outlets (9) on the outer periphery,
A part of the blown airflow that flows near the outer wall (9b) out of the blown airflow from the blowout port (9) is squeezed into the outer wall (9b) of the blowout port (9). 20) An air conditioner provided with a throttle channel (Y) for blowing in a direction substantially parallel to 20). In claim 1,
The throttle channel (Y) is composed of a large number of slit grooves (15) formed by cutting the outer wall (9b) of the air outlet (9) from the surface side thereof. Harmony machine. In claim 1,
The said throttle flow path (Y) is comprised by many through-holes (16) provided in the curved board (11) which forms the surface part of the outer side wall part (9b) of the said blower outlet (9). A featured air conditioner.

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