JP5930352B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner.

  In the ceiling-embedded air conditioner, a wind direction plate is provided in the vicinity of the air outlet, and the direction of the airflow blown out by the wind direction plate is guided. However, the airflow flowing through the longitudinal end portion of the wind direction plate tends to have a weak wind momentum, and further tends to entrain indoor air, so it tends to rise to the ceiling side. As a result, the airflow flowing through the longitudinal end of the wind direction plate can cause smudging to the ceiling.

  In this connection, a conventional ceiling-embedded air conditioner is disclosed in Patent Document 1, for example. In this air conditioner, the chord length at the end portion in the longitudinal direction of the wind direction plate is shortened, and the air flow at the end portion in the longitudinal direction of the wind direction plate is directed downward, thereby preventing smudging to the ceiling.

Japanese Patent Laid-Open No. 7-324802

  However, as disclosed in Patent Document 1, when the chord length at the longitudinal end of the wind direction plate is shortened, the airflow flows along the wind direction plate at the portion where the chord length at the longitudinal end of the wind direction plate is shortened. There is a risk that the distance cannot be obtained sufficiently and the airflow does not flow out in the direction of the wind direction plate. For this reason, in particular, in the case of downward blowing, there is a problem that the airflow flows out further downward than the extending direction of the wind direction plate, and short cycle is easily caused.

  The present invention has been made to solve the above-described problems, and reduces smudging due to the airflow flowing through the longitudinal end of the wind direction plate without facilitating a short cycle of the airflow at the longitudinal end of the wind direction plate. An object of the present invention is to provide an air conditioner.

  In order to achieve the above-mentioned object, the present invention is an air conditioner having at least one suction port and at least one air outlet at the lower part thereof, and one air outlet passage having one air outlet as the outlet. A wall portion that defines the airflow direction plate, a wind direction plate provided at the one air outlet, a blower portion that creates a flow of air that is sucked from the suction port and blown to the air outlet, and is sucked from the suction port and A heat exchanger provided in a flow path of air blown out to the air outlet, and the wall portion includes an inner flow path wall and an outer flow path wall, and the outer flow path wall in plan view. Is located farther from the heat exchanger than the inner flow path wall, and when viewed in a plane upstream of the wind direction plate, the longitudinal center portion of the blowout flow path of the outer flow path wall and the inner flow The distance between the road wall and the central portion in the longitudinal direction of the outlet channel is Side flow path wall, and both side portions of said longitudinal center portion, of the inner flow channel wall, shorter than the distance between both side portions of the longitudinal central portion.

  According to the air conditioner of the present invention, it is possible to reduce smudging due to the airflow flowing through the longitudinal end portion of the wind direction plate without facilitating a short cycle of the airflow at the longitudinal end portion of the wind direction plate.

It is the figure which showed the internal structure of the air conditioner of Embodiment 1 of this invention from the side. It is the figure which showed the blower outlet of the air conditioner of this Embodiment 1 from upper direction. It is a figure which shows the blowing flow path of the air conditioner of this Embodiment 1 from the direction of arrow III of FIG. It is a figure which shows the blowing flow path of the air conditioner of this Embodiment 1 from the direction of arrow IV of FIG. It is a figure of the same aspect as FIG. 2 regarding Embodiment 2 of this invention. It is a figure of the same aspect as FIG. 4 regarding this Embodiment 2. FIG. It is a graph which shows the relationship between length ratio L2 / L1 and the blowing angle of the airflow which flows out from the longitudinal direction center part of a wind direction board regarding this Embodiment 2. FIG. It is a graph which shows the comparison with a prior art example and this Embodiment 2 regarding the blowing angle of the airflow seen in the longitudinal direction position of a wind direction board. It is a figure of the same aspect as FIG. 3 regarding Embodiment 3 of this invention. It is a figure of the same aspect as FIG. 2 regarding Embodiment 4 of this invention. It is a figure of the same aspect as FIG. 2 regarding Embodiment 5 of this invention. It is a figure of the same aspect as FIG. 2 regarding Embodiment 6 of this invention.

  Embodiments of an air conditioner according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing the internal structure of the air conditioner of the first embodiment from the side, and FIG. 2 is a diagram showing the air outlet of the air conditioner of the first embodiment from above. FIG. 3 is a view showing the blowout flow path of the air conditioner of the first embodiment from the direction of the arrow III in FIG. 2, and FIG. 4 is a blow flow path of the air conditioner of the first embodiment. FIG. 4 is a view showing the direction from the direction of arrow IV in FIG. 2. More specifically, the air conditioner of Embodiment 1 is a so-called packaged air conditioner indoor unit. FIG. 1 shows that most of the case 3 of the air conditioner 1 is located behind the ceiling 5 of the room (the room and the room). The state is shown in which the lower part of the case 3 faces the room interior.

The air conditioner of the present invention has at least one suction port and at least one air outlet at the lower portion thereof, and further, a wall portion that defines one air outlet channel having one air outlet as an outlet. A wind direction plate provided at one outlet. As an example, the air conditioner 1 of the first embodiment has four outlets 7 and one inlet 9 in the lower part thereof, and further includes four wall portions 11 and four inlets 9. A wind direction plate 13 is provided. One wall portion 11 defines one outlet flow path 15 having one outlet 7 as an outlet. One wind direction plate 13 is provided at one air outlet 7 . Thus, in this Embodiment 1, although the four blower outlets 7 , the four wall parts 11, the four wind direction boards 13, and the four blowing flow paths 15 are provided, these are comprised similarly. Therefore, hereinafter, one air outlet 7 , one wall portion 11, one wind direction plate 13, and one air outlet channel 15 will be described.

The case 3 includes a centrifugal fan 17 as a blower unit that creates a flow of air that is sucked into the case 3 from the suction port 9 and blown out from the blowout port 7 to the target space (room), and such an air flow path. A heat exchanger 19 disposed therein is accommodated.

  As an example, in the first embodiment, the case 3 includes a top plate 3a having a rectangular shape in plan view and four side plates 3b extending downward from four sides of the top plate 3a. In other words, the case 3 is a box body in which an upper end surface of a rectangular tube body including four side plates 3b is closed by the top plate 3a.

  A panel 21 is detachably attached to the case 3 at a lower portion of the case 3, that is, at an open lower end surface of the box. The panel 21 is a design panel (decorative panel).

  Near the center of the panel 21, a grill-type panel suction port 21b is provided. A filter 23 for removing dust that has passed through the grill portion of the panel suction port 21b is provided downstream (upward) of the panel suction port 21b.

  As an example, in the first embodiment, each of the panel 21 and the panel suction port 21b has a rectangular outer edge in plan view.

  In a region between the outer edge of the panel 21 and the outer edge of the panel suction port 21b, four panel outlets 21a are provided. In the first embodiment, each of the panel 21 and the panel suction port 21b has four side edges, and four panel outlets 21a are provided, and each of the panel outlets 21a is provided. The panel 21 and the panel suction port 21b are arranged along corresponding sides except for the corner portion. Moreover, the four panel blower outlets 21a are located so that the panel suction inlet 21b may be surrounded.

In this Embodiment 1, the panel inlet 21b is the inlet 9 mentioned above, and the four panel outlets 21a are the four outlets 7 mentioned above. Moreover, the panel blower outlet 21a (blower outlet 7 ) and the blower flow path 15 are extended so that the corresponding | compatible side mentioned above may be taken, planar view, this extended direction shall be a longitudinal direction, and the direction orthogonal to the longitudinal direction may be set. The short direction. As an example, in the panel outlet 21a (blower outlet 7 ) and the outlet passage 15 shown in FIG. 2, the horizontal direction in FIG. 2 is the longitudinal direction, and the vertical direction in FIG. 2 is the short direction. .

  A fan motor 25 is disposed in the center of the case 3. The fan motor 25 is supported on the lower surface (the inner space side of the case) of the top plate 3 a of the case 3. The centrifugal fan 17 is attached to a rotating shaft extending downward in the fan motor 25. Further, a bell mouth 27 is provided between the centrifugal fan 17 and the filter 23 to form a suction flow path from the panel suction port 21 b toward the centrifugal fan 17. The centrifugal fan 17 sucks air into the case 3 from the panel suction port 21b and causes the air to flow out from the panel blower outlet 21a into the room that is the target space.

  A heat exchanger 19 is disposed on the radially outer side of the centrifugal fan 17. In other words, the heat exchanger 19 is disposed in a flow path of air generated in the case 3 by the centrifugal fan 17 and performs heat exchange between the air and the refrigerant.

  The heat exchanger 19 has a plurality of fins arranged at predetermined intervals in the horizontal direction, and a heat transfer pipe penetrating the fins, and the heat transfer pipe is connected to a well-known outdoor unit (not shown) by a connection pipe. As a result, a cooled refrigerant or a heated refrigerant is supplied to the heat exchanger 19. In addition, the structure and aspect of the centrifugal fan 17, the bell mouth 27, and the heat exchanger 19 are not specifically limited, In this Embodiment 1, a well-known thing is used.

In such a configuration, when the centrifugal fan 17 rotates, indoor air is sucked into the panel suction port 21b (suction port 9 ) of the panel 21. The air removed by the filter 23 is guided by the bell mouth 27 and sucked into the centrifugal fan 17. Further, in the centrifugal fan 17, the air sucked upward from below is blown out in the horizontal direction and outward in the radial direction. The air thus blown out is subjected to heat exchange and humidity adjustment when passing through the heat exchanger 19, and then the flow direction is changed downward, so that each panel outlet 21 a (outlet 7 ) enters the room indoors. Blown out.

Next, the detail of the blowing flow path 15 is demonstrated. The air conditioner 1 is provided with one corresponding wall portion 11 for each outlet channel 15. As an example, the wall portion 11 includes a portion provided in the case 3 and a portion provided in the panel 21 in the first embodiment. The panel outlet 21 a described above is an outlet of the outlet passage 15 formed in the panel 21, and the outlet of the outlet passage 15 formed in the case 3 is a case outlet 31. The case 3 has a case outlet 31 at a portion that becomes a boundary with the panel 21. In addition, the plane of FIG. 2 is a plane containing the case blower outlet 31, and is a surface of the level shown with the referential mark II of FIG. 3 and FIG. Moreover, the wind direction board 13 is located downstream of the case blower outlet 31, and in this Embodiment 1, it extends up and down across the panel suction inlet 21b (suction inlet 9 ). Further, the chord length of the wind direction plate 13 is constant over the longitudinal direction.

  As described above, the air conditioner of the present invention has at least one panel outlet and at least one case outlet. As an example, the air conditioner 1 of the first embodiment includes four panels. The air outlet 21a and four case air outlets 31 are provided.

  The wall in the present invention includes at least an inner channel wall and an outer channel wall. In the first embodiment, one wall portion 11 includes one inner flow path wall 41, one outer flow path wall 43, and two side walls 45.

  Each of the two side walls 45 extends so as to connect a corresponding end of the inner flow path wall 41 and a corresponding end of the outer flow path wall 43. The blow-out flow path 15 defined by the inner flow path wall 41, the outer flow path wall 43, and the two side walls 45 in a plan view has a substantially rectangular shape. The inner flow path wall 41 and the outer flow path wall 43 (portions other than the convex portions 51 described later) extend substantially in parallel.

  In plan view, the outer flow path wall 43 is located farther from the heat exchanger 19 than the inner flow path wall 41. In the plane upstream of the wind direction plate 13, a central portion 43 a of the outer flow path wall 43 in the longitudinal direction of the blowing flow path 15 and a central portion 41 a of the inner flow path wall 41 in the longitudinal direction of the blowing flow path 15. Distance (distance in the short direction) D1 between both side portions 43b of the central portion in the longitudinal direction of the outer flow channel wall 43 and both side portions 41b of the central portion in the longitudinal direction of the inner flow channel wall 41. Distance (interval in the short direction) D2.

  As described above, the mode for realizing the distance D1 <distance D2 is an example. In the first embodiment, the convex portion 51 is provided in the central portion 43a in the longitudinal direction of the outer flow path wall 43. Yes. The convex portion 51 protrudes toward the inner flow path wall 41 and is located upstream of the wind direction plate 13. Moreover, the convex part 51 exists in the part which has demarcated the case blower outlet 31 of case 3. FIG.

  In the specific configuration of the first embodiment, the distance (distance in the short direction) D1 between the convex portion 51 of the outer flow path wall 43 and the inner flow path wall 41 is the convex portion 51 of the outer flow path wall 43. Is shorter than the distance D2 between the portions on both sides of the inner channel wall 41 and the inner flow path wall 41.

  According to the air conditioner of the first embodiment configured as described above, the central portion of the outer channel wall in the longitudinal direction of the outlet channel and the longitudinal direction of the outlet channel of the inner channel wall The distance D1 between the central portion in the longitudinal direction of the outer channel wall and the distance between the both sides of the central portion in the longitudinal direction of the inner channel wall (in the short direction) Since it is shorter than the distance (D2), the central part in the longitudinal direction of the blowout flow path becomes narrower than the portions on both sides of the central part in the longitudinal direction of the blowout flow path. The airflow flowing into both sides of the central portion in the longitudinal direction of the road increases, and the wind speed at the longitudinal end portion of the outlet increases. For this reason, entrainment of indoor air is reduced, and sticking of the blown airflow to the ceiling surface can be suppressed. As a result, smudging can be suppressed. In addition, the suppression of such smudging depends on the configuration of the upstream wall portion of the wind direction plate, and the use of a wind direction plate in which the chord length at the end in the longitudinal direction is shorter than the chord length at the center portion in the longitudinal direction is not forced. Further, it is possible to reduce smudging due to the airflow flowing through the end of the wind direction plate in the longitudinal direction without facilitating a short cycle of the airflow at the end of the wind direction plate in the longitudinal direction.

  In addition, as described above, by not relying on the wind direction plate whose chord length at the end in the longitudinal direction is shorter than the chord length at the center in the longitudinal direction, it is easy to cause a short cycle of airflow at the end in the longitudinal direction of the wind direction plate. However, there is no fear of a short cycle for another reason in the airflow in the center of the outlet in the longitudinal direction. In other words, the central part in the longitudinal direction of the blowout outlet has a large amount of airflow flowing into the blowout air passage on both sides, and the wind speed is high. It is easy to face down, which may cause a short cycle. On the other hand, in this Embodiment 1, since the convex part 51 is provided in the center part 43a said in the longitudinal direction of the outer side flow wall 43, an air flow is made to flow in from right above a wind direction board, By increasing the wind speed on the surface of the wind direction plate, it becomes easy to obtain a blowing angle close to the vane exit angle. As a result, it is possible to make it difficult to cause a short cycle of the airflow in the central portion in the longitudinal direction of the wind direction plate.

Embodiment 2. FIG.
Next, the air conditioner of Embodiment 2 of this invention is demonstrated using FIGS. The second embodiment is the same as the first embodiment described above except for the parts described or limited below. FIG. 5 is a diagram of the same mode as in FIG. 2 regarding the second embodiment, and FIG. 6 is a diagram of the same mode as in FIG. 4 regarding the second embodiment. FIG. 7 is a graph showing the relationship between the length ratio L2 / L1 and the blowing angle of the airflow flowing out from the longitudinal center of the wind direction plate, and FIG. It is a graph which shows the comparison with a prior art example and this Embodiment 2 regarding the blowing angle of the airflow seen in the direction position.

  In the second embodiment, the length L2 in the longitudinal direction of the convex portion 151 of the outer flow path wall 43 is not less than 1/3 of the length L1 in the longitudinal direction of the outer flow path wall 43 itself. About the other than that, the convex part 151 is the same as the convex part 51 mentioned above.

  According to the second embodiment, in addition to the same advantages as those of the first embodiment, the following advantages can be obtained. Since the airflow at the end in the longitudinal direction of the air outlet is less vigorous than the airflow at the center in the longitudinal direction, as shown by the dotted arrow F1 in FIG. The flow angle θ1 along the exit angle of the wind direction plate 13 (0 ° in the horizontal direction parallel to the ceiling 5) is obtained. Usually, the blowout angle θ1 of the airflow at the longitudinal end of the blowout port is treated as a non-smugging limit angle (the minimum angle that does not cause smudging (the angle that is closest to horizontal blowing without smudging)).

  On the other hand, in the conventional example having no convex portion, the airflow in the central portion in the longitudinal direction of the air outlet has a strong momentum, and therefore, as shown by the dotted arrow F2 in FIG. Thus, the airflow cannot be completely moved along the wind direction plate, and the blowing air direction is likely to be directed downward from the exit angle of the wind direction plate, resulting in a blowing angle 2 larger than the blowing angle θ1. Therefore, in the second embodiment, as shown in FIG. 7, the convex portion 151 is provided so that the length ratio L2 / L1 is 1/3 or more, and even in the airflow in the central portion in the longitudinal direction of the air outlet. The blow angle θ1 along the exit angle of the wind direction plate 13 is obtained. As a result, as shown in FIG. 8, a constant blowing angle θ1 along the outlet angle of the wind direction plate 13 is obtained over the entire length of the outlet (0 ≦ x ≦ L1, ie, 0 ≦ x / L1 ≦ 1). It is also possible to make the blowing angle in the entire longitudinal direction of the blowout port equal to the non-smugging limit angle.

Embodiment 3 FIG.
Next, Embodiment 3 of the present invention will be described with reference to FIG. The third embodiment is the same as the first or second embodiment described above except for the parts described or limited below. FIG. 9 is a diagram of the same mode as FIG.

  In this Embodiment 3, the protrusion height of the convex part 251 is increasing the downstream of the blowing flow path. According to the third embodiment, in addition to the same advantages as those of the above-described embodiment, since the channel width in the short direction of the blowout channel is gradually reduced, an advantage that pressure loss can be reduced is obtained.

Embodiment 4 FIG.
FIG. 10 is a diagram of the same mode as FIG. 2 regarding the fourth embodiment of the present invention. In addition, this Embodiment 3 shall be the same as that of any of Embodiment 1-3 mentioned above except the part demonstrated or limited below. In the fourth embodiment, the length in the longitudinal direction of the convex portion 351 in a plan view decreases in a stepped manner toward the tip of the convex portion 251.

Embodiment 5 FIG.
FIG. 11 is a diagram of the same mode as FIG. 2 regarding the fifth embodiment of the present invention. In addition, this Embodiment 5 shall be the same as that of any of Embodiment 1-3 mentioned above except the part demonstrated or limited below. In the fifth embodiment, the length in the longitudinal direction of the convex portion 451 in plan view continuously decreases toward the tip of the convex portion 351.

Embodiment 6 FIG.
FIG. 12 is a diagram of the same mode as FIG. 2 regarding the sixth embodiment of the present invention. In addition, this Embodiment 6 shall be the same as that of any of Embodiment 1-5 mentioned above except the part demonstrated or limited below. In the sixth embodiment, the convex portion 551 is prepared as a separate body from the outer flow path wall and attached to the outer flow path wall. In addition, FIG. 12 is an illustration when the convex portion of the first embodiment is a separate body, and the sixth embodiment is not limited to this. For example, the convex portion of the second to fifth embodiments is separated. It can also be implemented as an embodiment.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

DESCRIPTION OF SYMBOLS 1 Air conditioner, 3 Case, 7 blower outlet , 9 suction inlet , 11 Wall part, 13 Wind direction plate, 15 Blowing flow path, 17 Centrifugal fan (blower part), 19 Heat exchanger, 21 Panel, 21a 31 Case outlet, 41 Inner channel wall, 41a, 43a Central part, 41b, 43b Both side part, 43 Outer channel wall, 51, 151, 251, 351, 451, 551 Convex part.

Claims (2)

An air conditioner having at least one inlet and at least one outlet at a lower part thereof,
A wall portion defining one outlet flow path having one outlet as the outlet;
A wind direction plate provided at the one outlet;
An air blowing section that creates a flow of air that is sucked from the suction port and blown out to the air outlet;
A heat exchanger provided in a flow path of air sucked from the suction port and blown to the blowout port,
The wall portion includes an inner channel wall and an outer channel wall,
In plan view, the outer channel wall is located farther from the heat exchanger than the inner channel wall,
When viewed in the plane upstream of the wind direction plate, the distance between the longitudinal center portion of the outlet channel of the outer channel wall and the longitudinal center portion of the outlet channel of the inner channel wall is Shorter than the distance between both side portions of the longitudinal center portion of the outer flow channel wall and both side portions of the longitudinal center portion of the inner flow channel wall,
A convex portion is provided in the longitudinal center portion of the outer flow path wall,
The convex portion protrudes toward the inner channel wall,
The convex portion is located upstream of the wind direction plate,
Plan view, a longitudinal length L2 of the protrusions state, and are more than 1/3 of the longitudinal length L1 of the outer channel wall,
The protrusion height of the convex portion increases toward the downstream of the blowout flow path.
Air conditioner. The wall is provided in the case of the air conditioner,
The air blowing part and the heat exchanger are accommodated in the case,
A panel is provided at the bottom of the case;
The air conditioner has at least one panel outlet and at least one case outlet.
The panel outlet is an outlet of the outlet passage formed in the panel,
The case outlet is an outlet of the outlet passage formed in the case,
The air outlet is the panel air outlet,
The wind direction plate is located downstream of the case outlet;
The convex portion exists in a portion of the case that defines the case outlet.
The air conditioner according to claim 1.

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