JP4391575B1 - Embedded ceiling air conditioner - Google Patents

Abstract

[PROBLEMS] To provide a simple structure of a louver for wind direction control provided at an air outlet so as to prevent blown air from directly blowing to a lower position of an air conditioner and to suppress smudging of a ceiling surface due to the Coanda effect. To provide.
SOLUTION: A main body casing 1 of an air conditioner, a decorative panel 6 provided in the main body casing, a suction port 3 provided substantially at the center of the decorative panel, and an indoor air provided around the suction port. 1 is a ceiling-embedded air conditioner provided with an air outlet 4 for blowing air and a wind direction control louver 2 provided at the air outlet, the louver 2 having one end on the decorative panel 6 on the inlet side. The structure is such that the rotating shaft 5 is rotatable and the other end is an open edge, and the louver 2 is blown out from the outermost side of the outlet 4 when opened at the maximum louver opening θmax. Is a structure in which an open end edge is present on the outer side of the portion where the louver 2 hits the louver 2.
[Selection] Figure 1

Description

  The present invention relates to a ceiling-embedded air conditioner in which an indoor unit is disposed on a ceiling, and more particularly to a structure of a wind direction control louver.

  Normally, a ceiling-embedded air conditioner has a device body housed in the back of the ceiling, and a panel portion provided with a room air inlet and a temperature-controlled cold / air outlet is exposed on the ceiling surface. Install. The main body part behind the ceiling accommodates parts such as a fan and a driving motor for circulating indoor air, a heat exchanger for adjusting the air temperature, and a box containing control electric parts. On the other hand, a wind direction control plate for adjusting the temperature and temperature of the cool / warm air blown out, and a driving device for the wind direction control plate are accommodated in the panel portion.

  As a prior art in the structure of the wind direction control plate, for example, as shown in Patent Document 1, one end edge along the longitudinal direction of the wind direction control plate (the direction of the rotation axis of the wind direction control plate) is a straight line, and the other end edge is A structure is disclosed in which the central curvature is lower than both sides. According to this structure, the air direction of the conditioned air to be blown out is all equal and the wind speed distribution is almost uniform, which reduces the influence of the Coanda effect, which changes the flow direction along the object when placed in the flow. It is not to receive. Therefore, airflow is prevented from being blown onto the ceiling surface, and smudging (dirt) of the ceiling surface is suppressed.

In addition, as a conventional technique for preventing airflow from the air conditioner from directly hitting the human body while suppressing smudging of the ceiling surface, for example, as shown in Patent Document 2, a wind direction control plate and an air outlet to the room A technology that focuses on the related structure has been proposed. According to this technology, a wind direction deflecting plate that deflects the blown airflow in the vertical direction, a first blowout port of the decorative panel, and a second blowout port that blows the wind along the ceiling surface are provided. The wind is blown out along the ceiling surface from the second outlet in operation.
JP 2007-322114 A JP 2006-336916 A

  However, in the thing of said patent document 1, the length of the flow direction of the conditioned air orthogonal to the longitudinal direction of a wind direction control board is not enough, Furthermore, the air flow which conditioned air blows off from the inner side and the outer side of a wind direction control board Since the road is formed, sufficient consideration has not been given to the fact that cold / hot air directly hits the human body under the air conditioner.

  Further, in the above-mentioned Patent Document 2, when the temperature and humidity of the air-conditioned space is stabilized and the cooling load is reduced and switching to the air flow along the ceiling surface, the outer peripheral portion of the decorative panel is operated up and down, Lowering the air outlet requires switching of the air outlet, which requires a complicated structure and complicated operation, and is not sufficiently considered for a simpler structure and operation.

  The object of the present invention is to prevent the blown air from being directly blown to the lower position of the air conditioner by the simple structure of the air direction control louver provided at the air outlet, and to suppress the smudging of the ceiling surface due to the Coanda effect. An object of the present invention is to provide a ceiling-embedded air conditioner.

In order to solve the above problems, the present invention adopts the following configuration.
A main body casing of an air conditioner embedded in the ceiling surface , a decorative panel provided on the bottom surface of the main body casing, and a suction that is provided in the center of the decorative panel and sucks room air into the main body casing A ceiling-embedded air conditioner comprising: a mouth, a blowout port provided around the suction port for blowing air into the room, and a louver for wind direction control provided in the blowout port,
The louver has a structure in which one end of the decorative panel on the suction port side is rotatably provided by a rotation shaft and the other end is an open end edge, and the blowout air from the blowout port It is a cantilever structure that does not pass into the room from one end side,
A motor is connected to one end of the rotary shaft provided at one end of the louver, and a spring that biases the louver in a closing direction is provided at the other end of the rotary shaft,
Further, when the opening from the horizontal line is the maximum louver opening θmax, the louver has the open edge further outward than the portion where the blown air descending from the outermost side of the blowout outlet hits the louver. The louver has a structure that exists, and when the opening from the horizontal line is open at a minimum louver opening θmin, the height position of the open edge of the louver is separated by a predetermined distance from the ceiling surface. An air conditioner that has a structure that suppresses smudging of the ceiling surface .

In the air conditioner , the relationship between the length L1 of the outlet in the direction orthogonal to the rotation axis and the length L2 of the louver in the direction orthogonal to the rotation axis is L2> L1, The air conditioner whose L2 / L1 is 1.4-1.8.

In the air conditioner, the minimum louver opening θmin is set in a range of 15 to 35 ° from the horizontal line, and the maximum louver opening θmax is in a range of 35 to 55 ° from the horizontal line. Air conditioner set to .

    According to the present invention, the louver provided at the air outlet has a structure in which one end of the louver is rotatably provided on the suction-panel-side decorative panel and the other end is an open end, and the louver has a short direction ( By specifying the length L2 in the direction orthogonal to the louver rotation axis, it is possible to suppress blowing of conditioned air below the air conditioner.

  In addition, the longer louver direction allows the louver open end height position to be farther away from the ceiling surface when the louver is at the minimum blowing angle, so the ceiling surface can be smudged by the Coanda effect with a simple structure. Can be suppressed.

  The ceiling-embedded air conditioner according to the embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a diagram showing a configuration of a wind direction control louver at an outlet of an air conditioner according to an embodiment of the present invention. FIG. 2 is a sketch showing the structure of a wind direction control louver having a heat insulating material according to this embodiment. FIG. 3 is a diagram showing a general configuration of the ceiling-embedded air conditioner according to the present embodiment.

  First, a general configuration of an air conditioner according to an embodiment of the present invention will be outlined with reference to FIG. 31 is a building beam, 32 is a ceiling plate, 33 is an air conditioner body installed between the beam 31 and the ceiling plate 32, 34 is an anchor bolt fixed to the beam, and 35 is an opening of the ceiling plate 32. It is a decorative panel that closes the lower opening end of the air conditioner body 33.

  A suction port 37 provided with a filter 36 is provided at the center of the decorative panel 35, and a blower outlet 41 including a wind direction control louver (wind direction plate) 42 arranged in four directions around the suction port is provided. 37, a fan motor 38, a blower fan 39, and a heat exchanger 40 are installed in a passage connecting the blower outlet 41 and the indoor air sucked into the blower fan 39 from the suction port 37 is heat-exchanged by the heat exchanger 40, It is configured to be sent into the room from the outlet 41 through a wind direction control louver (wind direction plate) 42.

  1 and 2, in the air conditioner according to the present embodiment, the air conditioner main body casing 1 (hereinafter referred to as a main body casing) embedded in the ceiling and the bottom surface of the main body casing 1 are provided. A decorative panel 6, a suction port 3 that is provided in a substantially central portion of the decorative panel 6, and sucks room air into the inside of the main body housing 1, and a blower outlet 4 that is provided on four sides around the suction port 3 and blows air into the room. A wind direction control louver 2 (hereinafter referred to as a louver) provided at the air outlet, a rotating shaft 5 provided at one end of the louver 2 that rotates, and a spring that biases the rotating shaft in the louver closing direction. 7 and a motor 10 for driving the rotary shaft 5.

  Here, as for the blower outlet 4 provided in the outer side of the circumference | surroundings 4 sides of the suction inlet 3, the blower outlet 4 is not provided in four corners (corner part) where each four sides orthogonally cross. Therefore, cold and warm air is prevented from reaching the rooms facing the four corners by the conventional technology. In the embodiment of the present invention, the structure of the louver shown in FIG. 2 allows the cool and warm air to reach indoor positions facing the four corners, details of which will be described later.

  The louver 2 is rotatable by a rotating shaft 5 at a support portion of the decorative panel 6 provided on the inner side of the blowout port 4 (side toward the suction port 3), and the cool and warm air from the air conditioner body rotates. From the inside of the shaft 5 (the side facing the suction port 3), that is, from the back side of the louver, it is structured not to pass into the room. In the general air conditioner shown in FIG. 3, there is a space through which cool and warm air passes on the inner side (rear side) and the outer side (the side facing the outer periphery of the decorative panel 35, that is, the pressure surface side of the louver) of the louver 42. To do. The louver 2 according to the present embodiment has a cantilever structure with a rotating shaft 5 at a so-called support portion of the decorative panel 6, and due to this structure, the louver length (in the figure) from the inner side to the outer side of the outlet 4 in the louver 2. In the illustrated example of FIG. 1, the length of the louver 2 from the left end to the right end, or the length of the louver 2 in the direction orthogonal to the rotation axis 5) is longer than that of FIG.

  Another reason for increasing the length of the louver 2 is when the opening degree of the louver 2 reaches a maximum opening degree (35 to 55 degrees, preferably 40 to 50 degrees from the horizontal position of the ceiling board). 1 (the lowest two-dot chain line in the illustrated example of FIG. 1), the cool and warm air descending along the main body housing 1 collides with the louver 2 and further flows along the louver shape and blows out into the room with its flow velocity. This is so as not to flow in the direction directly below the air outlet 4. When it flows in the direct downward direction, this flow directly goes around the suction port 3 to form a short circuit, and the length of the louver 2 is increased to prevent this short circuit. In addition, if the blown air flows in the downward direction, the cold / hot air blows directly on the human body at that location, thereby adversely affecting it.

  Referring to FIG. 1, L1 shown is the length in the direction perpendicular to the rotation shaft 5 at the outlet 4, and L2 shown is the length in the same direction in the louver 2. The louver 2 rotates about the rotation shaft 5 as a fulcrum, and the other end side is from the position (horizontal position of the ceiling surface) blocking the air outlet to the maximum louver angle θmax (for example, the lowest louver opening in FIG. 1). It is configured to open, and is configured to be rotatable between the minimum louver opening θmin (for example, the middle louver opening in FIG. 1) and the maximum louver opening θmax when the air conditioner is in operation. . The minimum louver opening θmin is configured to be an opening that suppresses the occurrence of smudging on the ceiling surface due to the Coanda effect by the blown air even when the minimum louver opening θmin. It is 15 ° to 35 °, preferably 20 ° to 30 °, and its θmax is 35 ° to 55 °, preferably 40 ° to 50 °.

  The louver length is such that the blown air descending from the outermost side of the blowout port of the main body casing 1 collides with the louver 2 having an opening of θmax and further flows along the surface of the louver 2. One. That is, as shown in FIG. 1, at the maximum louver opening θmax indicated by a two-dot chain line, a one-dot chain line perpendicular from the outermost side of the outlet of the main body housing 1 is inside the open edge (tip) of the louver 2. The length of crossover. The length of the louver 2 extending from the crossing point is a dimension that does not cause a short circuit to the suction port 3, and preferably the louver tip is located at the minimum louver opening θmin from the outermost side of the outlet. Further, it is preferable that the length be sufficiently outside (for example, outward from the outer surface of the main body housing 1). When the length of the louver is increased in this way, the air from the outlet can be spread evenly along the louver, and temperature unevenness can be suppressed. In particular, when the minimum louver opening θmin, the air from the air outlet can be blown far in the horizontal direction along the louver, so that it is possible to reliably avoid the cold and hot air blowing directly to the human body below, and discomfort due to wind Can be prevented.

  In addition, the minimum louver opening θmin is preferably set to an angle that can suppress ceiling surface smudging due to the Coanda effect. Here, the smudging of the ceiling surface due to the Coanda effect means that when the air flowing out along the surface of the louver 2 passes through a place close to the ceiling, a negative pressure is generated between the passing air and the ceiling, and dirt in the air. This refers to the phenomenon in which minutes adhere to the ceiling. Even in the case of the opening of θmax, the louver structure has a length longer than the crossing point intersecting with the alternate long and short dash line shown in FIG. Since the interval is large, the effect of suppressing smudging is further exhibited. The uppermost louver opening shown in FIG. 1 indicates a case where the louver 2 is closed when the air conditioner is stopped. A recess is formed in a portion of the decorative panel at a substantially intermediate portion between the outermost part of the decorative panel 6 and the outermost side of the blower outlet 4. When the louver 2 is closed, the tip of the louver is the decorative panel 6. Thus, the louver is prevented from protruding from the decorative panel. That is, when the louver is closed, the back surface of the louver is substantially flush with the surface of the decorative panel, and the shape of the entire decorative panel 6 is smoothly changed to improve the design.

  Explaining in detail, when the louver 2 is set at a certain angle with respect to the horizontal position of the ceiling surface, if the louver length in the direction orthogonal to the rotation axis (short direction) is short as in the conventional example (this embodiment) In comparison with the long louver in FIG. 2, there is a large possibility that a short circuit effect occurs in which the blown air circulates into the suction port 3, and if the rotation angle is reduced to avoid this, a Coanda effect is likely to occur in turn. . On the other hand, in the present embodiment, the louver length that does not cause the short circuit effect at the lowermost louver opening (θmax) shown in FIG. 1 has the louver opening at the middle louver opening (θmin) in FIG. The distance between the open edge and the ceiling surface is large, and the Coanda effect is unlikely to occur.

  Furthermore, referring to FIG. 1, the length dimension L1 of the blower outlet 4 (the length in the direction perpendicular to the rotary shaft 5 at the blower outlet 4) and the length dimension L2 of the louver 2 (the length of the louver 2 in the same direction). If it demonstrates from a viewpoint, if a specific numerical example is given (the concrete structural example which does not produce the above-mentioned short circuit effect and it is hard to produce the Coanda effect), it is L1 = 66.5mm, L2 = 106mm, The ratio L2 / L1 = 1.59. As a result of various experiments, it was confirmed that L2 / L1 is optimally 1.6 and good results are obtained when 1.4 to 1.8.

  In the louver 2, the motor shaft is rotated by a control input signal applied to the motor 10, and the rotation shaft 5 is rotated by the rotation of the motor shaft, whereby the opening degree of the louver 2 is adjusted. The louver 2 has a rotation fulcrum at the innermost side of the air outlet 4, and a structure in which cool and warm air does not pass from the inside (louver back side) of the rotation fulcrum is located below the air conditioner. This is in order to avoid direct blowing of cold / hot air. It is not preferable for a person who has a seat on the lower side of the air conditioner to blow strong cold / hot air directly from the air conditioner, but it is preferable to indirectly cool / heat the air with cold / hot air from the surroundings. Furthermore, when the cool / warm air blows out to the lower side of the air conditioner, the blown cool / warm air directly flows into the suction port 3 to prevent the cooling / heating efficiency from being lowered.

  2, the louver 2 is composed of a louver main body 12 and a heat insulating material 8 that is detachably attached to the louver main body 12. The louver main body 12 has the rotary shaft 5 as one end and the other end is It is an open end, and cool and warm air is guided from the open end to flow into the room, and the heat insulating material 8 is sponge-like and has a heat insulating effect due to bubbles inside the sponge, and the material is resin. Foam is an example and is made of some deformable material. A heat insulating material 8 is fitted on the louver body 12 in a gap formed between the stopper 9 (left and right ends) and the louver body 12 so as to be integrated with the louver body 12.

Louver 2 in the present embodiment, since air blown rotary shaft 5 from a cantilever structure as a pivot center and the inside of the rotary shaft (louvers back side) is structure that does not pass through, cool air louver rear surface during the cooling (louvers There is a risk that condensation will occur on the louver surface ( inside the room) due to contact with the air conditioner main body side), and a heat insulating material 8 is provided on the surface side (pressure surface side) of the louver 2 to prevent this condensation.

  An integrated structure in which the heat insulating material 8 is mounted on the louver body 12 is shown in FIG. By having the stopper 9 which fits the heat insulating material 8 into the left and right end portions of the louver main body 12, the heat insulating material can be easily attached by fitting the heat insulating material 8 without using an adhesive or an adhesive. The exchange work of 8 becomes easy.

  In FIG. 2 showing the overall structure of the louver, the flow direction of the cool and warm air is indicated by arrows. The cool and warm air descending from the air conditioner main body abuts the louver 2 and changes its flow direction. In the case of a conventional louver, the cool and warm air flows in parallel with the length direction of the louver. In the embodiment, the flow direction of the cool / warm air is a cool / warm air flow component (longitudinal flow component of the louver 2) parallel to the length direction of the louver 2, and the motor side 10 or biasing spring orthogonal to the length direction. This is a flow direction that can be decomposed into a cold / hot air flow component (width direction flow component of the louver 2) toward the side 11. The latter cold / hot air flow component is a flow in which the cold / hot air reaches the room facing the corners (corner portions) of the four-side air outlets 4.

  The flow direction of the cool / warm air in the present embodiment has a flow component in the width direction of the louver 2 (the left-right direction in the illustrated example of FIG. 2, that is, the direction of the rotating shaft 5). This is due to the shape in which the central portion in the width direction is raised and is inclined downward from the raised portion along the left-right direction. That is, as shown in FIG. 2, it is possible to obtain the effect that the flow of the blown air spreads left and right by the shape in which the central portion of the louver 2 is raised so as to widen the left and right blowout range in the horizontal direction and the inclined shape that decreases to the left and right. Can do.

  As a specific example of the formation of the raised shape of the central part and the lowered inclined shape of the left and right parts, ribs are planted intermittently along the width direction of the louver body 12, and the ribs of the central part in the width direction are formed. Make the height the highest and gradually lower it towards the left and right edges. The louver 2 is configured by fitting a flat rectangular parallelepiped heat insulating material 8 to the louver body 12 having such ribs. The flow of the blown air is guided to the left and right ends by decreasing the height of the ribs in order from the center to the left and right ends. The function of the rib is to blow out the flow direction of the blown air in the direction facing the four corners of the blowout port 4 by gradually lowering its height in the width direction as described above. In addition, the louver 2 With this cantilever structure, the louver 2 may vibrate due to the blown air as the louver length becomes longer, and the louver body 12 is also reinforced to prevent this vibration.

  In addition, the louver main body 12 is not limited to a rib having a height difference, and the louver main body 12 without a rib is provided with a heat insulating material 8 having a shape in which the central portion is raised and becomes lower in the width direction (left-right direction) in order. The louver 2 may be formed by fitting. Furthermore, regardless of the presence or absence of the heat insulating material 8, the shape of the louver 2 itself may be a shape in which the central portion is raised and is gradually lowered in the width direction (left-right direction).

  The urging spring 7 wound around the rotating shaft 5 of the louver main body 12 shown in FIG. 2 is removed from the air conditioner main body by increasing the length of the louver 2 (the length from the rotating shaft to the open end). The counterclockwise rotational force in FIG. 1 increases due to the wind pressure of the cool / warm air, which is to counter this. Although the louver 2 is held at a constant opening by the motor 10, the rotating shaft 5 on the opposite side of the motor 10 receives the force of the louver 2 to open by receiving the wind pressure of the cool and warm air. The spring 7 acts to resist this.

  In other words, in the air conditioner operation, when the louver 2 is rotated from the bottom blowing to the horizontal blowing (direction to close to the main body housing 1) with the rotating shaft 5 as a fulcrum, all the blown air is received on the upper surface of the louver and blown out. Since the force of air is received, providing the spring 7 to assist the rotational torque has an effect of reducing the rotational driving torque when the louver 2 is closed. In addition, when the air conditioner is stopped, the louver 2 can be kept closed by the force acting in the closing direction of the spring 7 when the louver 2 is closed and stored on the main body housing 1 side.

  In addition, although embodiment mentioned above demonstrated the case where an air conditioner is a four-way indoor unit, this invention can be similarly implemented not only in this but in a two-way indoor unit.

It is a figure which shows the structure of the louver for wind direction control in the blower outlet of the air conditioner which concerns on embodiment of this invention. It is a sketch which shows the structure of the louver for wind direction control which has a heat insulating material regarding this embodiment. It is a figure which shows the general structure of the ceiling embedded type air conditioner which concerns on this embodiment.

Explanation of symbols

1. Air conditioner main unit housing (main unit housing)
2 Wind direction control louver 3 Suction port 4 Air outlet 5 Rotating shaft 6 Decorative panel 7 Biasing spring 8 Heat insulating material 9 Stopper 10 Motor 12 Louver main body 31 Building beam 32 Ceiling plate 33 Air conditioner main body 34 Anchor bolt 35 Cosmetic panel 36 Filter 37 Suction port 38 Fan motor 39 Blower fan 40 Heat exchanger 41 Air outlet 42 Wind direction control louver (wind direction plate)

Claims (3)

A main body casing of an air conditioner embedded in the ceiling surface , a decorative panel provided on the bottom surface of the main body casing, and a suction that is provided in the center of the decorative panel and sucks room air into the main body casing A ceiling-embedded air conditioner comprising: a mouth, a blowout port provided around the suction port for blowing air into the room, and a louver for wind direction control provided in the blowout port,
The louver has a structure in which one end of the decorative panel on the suction port side is rotatably provided by a rotation shaft and the other end is an open end edge, and the blowout air from the blowout port It is a cantilever structure that does not pass into the room from one end side,
A motor is connected to one end of the rotary shaft provided at one end of the louver, and a spring that biases the louver in a closing direction is provided at the other end of the rotary shaft,
Further, when the opening from the horizontal line is the maximum louver opening θmax, the louver has the open edge further outward than the portion where the blown air descending from the outermost side of the blowout port hits the louver. The louver has a structure that exists, and when the opening from the horizontal line is open at a minimum louver opening θmin, the height position of the open edge of the louver is separated by a predetermined distance from the ceiling surface. An air conditioner having a structure that suppresses smudging of a ceiling surface . In claim 1,
The relationship between the length L1 of the outlet in the direction orthogonal to the rotation axis and the length L2 of the louver in the direction orthogonal to the rotation axis is L2> L1, and further, L2 / L1 is 1.4 to L2. An air conditioner characterized by being 1.8. In claim 1 or 2,
The minimum louver opening θmin is set in the range of 15 to 35 ° from the horizontal line, and the maximum louver opening θmax is set in the range of 35 to 55 ° from the horizontal line. Air conditioner.

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