JP6283939B2 - Embedded ceiling air conditioner - Google Patents

Description

  The present invention relates to a ceiling-embedded air conditioner in which a casing is embedded in a ceiling, and more particularly to a structure of an air passage.

  A ceiling-embedded air conditioner has a housing containing a heat exchanger and a blower fan (turbo fan) embedded in the ceiling, and air sucked from a suction port provided at the bottom center of the housing. An air conditioner that exchanges heat with a refrigerant in a heat exchanger and adjusts the air direction with a wind direction plate from an air outlet provided around the suction port and sends it out indoors. It is used for.

  In the ceiling-embedded air conditioner, when the wind direction plate is rotated to the side blowing position during cooling operation, the cold wind sent from the blowout outlet touches the ceiling surface and water droplets are generated, making it easy for dust to adhere, Furthermore, there is a problem that mold is generated (so-called smudging) and a problem that when the wind direction plate is rotated to the lower blowing position during heating operation, the warm air sent out from the outlet tends to rise and hardly reach the feet. Had.

  Therefore, in the conventional example, an introduction portion for introducing the intake air sucked from the intake port is provided between the upper portion of the heat exchanger and the housing, while an auxiliary blowout port is provided outside the blowout port. A partition that partitions the air passage is provided between the auxiliary air outlets, and an auxiliary air passage that is partitioned from the main air passage is formed by the partition. As a result, air that is not heat-exchanged through the auxiliary air passages is blown out from the auxiliary air outlet and along the ceiling surface to prevent cold air from coming into contact with the ceiling surface, and warm air is suppressed from the outside so that it can easily reach the feet. There is something. (See Patent Document 1).

JP 2000-283493 A

  However, there is slight smudging due to the cold air blown in the direction without the auxiliary air outlet. Also, since the heat-exchanged warm air blown out from the air outlet is more likely to rise than air that is not heat-exchanged from the auxiliary air outlet, the warm air spreads from the air outlet and flows in all directions from the part without the auxiliary air outlet. In order to ascend, the air that was blown out from the auxiliary air outlet and was not heat-exchanged could not suppress the warm air.

  The present invention solves the above-described problems and improves comfort by blowing out heat-exchanged air so as to cover the entire outer circumference of the air that is not heat-exchanged in an air conditioner equipped with an auxiliary air passage. An object of the present invention is to provide a ceiling-embedded air conditioner.

  In order to solve the above-described problems, the present invention includes a fan motor, a blower fan that is pivotally supported by the fan motor, a bell mouth that takes air into the blower fan, and the blower. A heat exchanger that surrounds the fan is disposed, and includes a partition body that divides a space between the housing and the heat exchanger into a main air passage through which heat is exchanged and an auxiliary air passage through which air that is not heat-exchanged flows. A rectangular plate-shaped decorative panel is attached to the lower end of the casing, and the decorative panel has a ceiling-embedded type provided with an air outlet facing the main air passage and the auxiliary air passage along each side of the square. In the air conditioner, the decorative panel is provided with an auxiliary air outlet through which a part of the air flowing through the auxiliary air passage is guided between the air outlets adjacent at the corners of the four corners of the decorative panel. To do.

  In the ceiling-embedded air conditioner of the present invention configured as described above, air that is not heat-exchanged is provided between the blow-out port and the auxiliary blow-out port so as to cover the entire outer circumference of the heat-exchanged air blown out from the blow-out port. By blowing out from both sides, it is possible to cover the entire ceiling with air that is not heat-exchanged during cooling operation, preventing smudging, and suppressing the entire circumference of the heat-exchanged air that has become warm air during heating operation Can be wrapped in warm air and delivered to your feet without escaping, improving comfort.

It is sectional drawing of the ceiling-embedded air conditioner by this invention. 1 is an external view of a ceiling-embedded air conditioner according to the present invention. It is principal part sectional drawing at the time of the cooling operation of the ceiling-embedded air conditioner by this invention. It is principal part sectional drawing at the time of the heating operation of the ceiling-embedded air conditioner by this invention. It is the figure which looked at the heat insulation member provided with the drain pan of this invention from the ventilation fan side. It is an external view of the ventilation fan of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention will be described in detail as examples based on the accompanying drawings, but the present invention is not limited to these.

  The ceiling-embedded air conditioner 1 according to the present invention has a sheet metal box-shaped housing 2 embedded in a ceiling 10 as shown in FIG. 1, and the housing 2 is a rectangular top plate 21. And a side plate 22 extending downward from the outer periphery of the top plate 21, a heat insulating member 23 is provided inside the side plate 22, and a bottom surface (lower surface in FIG. 1) is opened.

  A fan motor 31 is fixed inside the top plate 21 of the housing 2 by screws or the like, and the blower fan 3 is pivotally supported on a shaft 31 a extending downward from the fan motor 31. A turbo fan is used as the blower fan 3. The blower fan 3 and the fan motor 31 are arranged at the approximate center inside the housing 2.

The bottom surface side of the housing 2 is covered with a heat insulating member 24, and a portion of the heat insulating member 24 facing the blower fan 3 is opened to become the suction port 11, and the bell mouth 12 is disposed between the blower fan 3 and the suction port 11. Is done.
As the blower fan 3 is rotated by the fan motor 31, indoor air is sucked into the housing 2 from the suction port 11. The air sucked into the housing 2 is guided to the blower fan 3 by the bell mouth 12 and blown out outward in the radial direction of the blower fan 3.

  A heat exchanger 4 is arranged around the blower fan 3 in a frame shape surrounding the blower fan 3. The heat exchanger 4 is supported by a support column 41 having an upper end 42 of the heat exchanger 4 fixed to the top plate 21, and a gap without the support column 41 becomes an introduction port 63 described later.

  The heat exchanger 4 is connected to a reversible refrigeration cycle circuit capable of cooling operation and heating operation (not shown), functions as an evaporator during cooling operation, cools air, and functions as a condenser during heating operation. And heat the air.

  The heat insulating member 24 is coated on a portion facing the lower surface of the heat exchanger 4, and also serves as a drain pan 13 that receives drain water generated by the heat exchanger 4.

  Between the heat insulating members 23, 24 provided in the housing 2 and the heat exchanger 4, an air passage 5 is provided for guiding the air blown from the blower fan 3 toward the lower surface of the housing 2. 3 and FIG. 4, the air passage 5 is not exchanged with the main air passage 51 through which the air K <b> 1 heat-exchanged with the refrigerant in the heat exchanger 4 by the partition 14 flows and the heat introduced from the inlet 63. It is partitioned into an auxiliary air passage 61 through which air K2 flows. The lateral width W1 between the heat insulating members 23 and 24 of the auxiliary air passage 61 and the partition 14 is smaller than the lateral width W2 between the heat exchanger 4 and the partition 14 of the main air passage 51. ing.

  The partition 14 is made of sheet metal, and as shown in FIGS. 3 to 5, the lower end is fixed to the heat insulating member 24, the upper end is bent toward the heat exchanger 4, and the tip of the upper end is the upper end of the heat exchanger 4. 42 is disposed so as to surround the heat exchanger 4.

  As shown in FIGS. 1 and 2, a decorative panel 15 is attached to the lower end of the housing 2. The decorative panel 15 covers the bottom surface of the housing 2 and the ceiling 10 around the bottom surface by a rounded square plate made of resin. In the center of the decorative panel 15, a suction grille 17 having a bar shape for taking air into the suction port 11 is detachably attached. A dust removal filter 18 is held on the back surface (upper surface in FIG. 1) of the suction grill 17.

  An air outlet 16 is provided at a position facing the outlet portion of the blower passage 5 of the decorative panel 15. Each air outlet 16 is a through-hole penetrating from the outlet portion of the air passage 5 while being inclined outward. As shown in FIG. 2, in the present embodiment, the air outlets 16 are arranged at four locations around the inlet port 11 in a long rectangular shape along each side of the decorative panel 15.

  A wind direction plate 19 is rotatably attached to each outlet 16. The wind direction plate 19 is a long plate material that substantially matches the opening shape of the air outlet 16 and can close the air outlet 16 in the closed position, and a rotating support shaft (not shown) is coaxially formed at both ends in the longitudinal direction. It is provided and rotated by a motor (not shown).

  The main air passage 51 and the auxiliary air passage 61 once merge at the air outlet 16, but the wind direction plate 19 plays a role of extending the partition 14, and the air K 1 and the air K 2 are separately separated by the rotation of the air direction plate 19. It is blown into the room. For example, during the cooling operation shown in FIG. 3, the air direction plate 19 rotates to the side blowing position in the outlet 16 so that the air K1 flowing through the main air passage 51 and blown into the cold air is blown out in the horizontal direction. The air K2 that flows through the auxiliary air passage 61 is blown out from the end of the air outlet 16 narrowed by the wind direction plate 19, and the air K1 that has become cold air along the surface of the ceiling 10 is prevented from coming into contact with the ceiling surface. To prevent.

  Further, during the heating operation shown in FIG. 4, the air direction plate 19 is rotated to the lower blowing position in the air outlet 16, so that the air K <b> 1 flowing through the main air passage 51 and being warmed is suppressed by the air direction plate 19. The air K2 that has flowed through the auxiliary air passage 61 to the outside of the air K1 is blown out, so that the warmed air K1 is suppressed from the outside and easily reaches the feet.

  In addition, although the main ventilation path 51 and the auxiliary ventilation path 61 are not shown in figure, you may provide a blower outlet separately, respectively. In that case, the partition 14 extends to the outlet 16 of the decorative panel 15 and the wind direction plate 19 covers the outlet portion of the main air passage 51, and rotates in the outlet portion of the main air passage 51 during operation. Move.

  As shown in FIG. 2, the decorative panel 15 is provided with an auxiliary air outlet 62 through which a part of the air K2 flowing through the auxiliary air passage 61 is guided between the adjacent air outlets 19 at the corners of the four corners of the decorative panel. Yes.

  The auxiliary air outlet 62 is a through hole penetrating through the decorative panel 15 from the auxiliary hole 64 provided outside the partition 14 fixed to the heat insulating member 24 shown in FIG. Thus, the surface of the decorative panel 15 is a narrow mouth, and is provided outside the virtual line X connecting the outer ends of the air outlet 16.

  According to this embodiment, air K2, which is not heat-exchanged, is blown out from both the blower outlet 16 and the auxiliary blower outlet 62 so as to cover the entire outer periphery of the air K1 blown out from the blower outlet 16 and subjected to heat exchange. For example, during the cooling operation, the entire ceiling 10 can be covered with the air K2, which is more effective in preventing smudging than blowing out the air K2 only from the air outlet 16. Moreover, by mixing the air K2 with the cold air K1, the wind power increases and reaches far, making the air-conditioned room comfortable. Further, during the heating operation, air K2, which is not heat-exchanged, is blown out from the entire circumference outside the air K1 from the auxiliary air outlet 62 provided outside the virtual line X connecting the air outlet 16 and the outer end of the air outlet 16. Therefore, it can be suppressed so as to surround the entire circumference of the air K1 that has become warm air that tends to rise, and the warm air is wrapped and delivered to the feet without escaping, improving comfort.

  As shown in FIGS. 3, 4, and 6, the blower fan 3 has an annular shroud 33 having an inlet opening facing the bell mouth 12 and a central portion 32 a to which the shaft 31 a of the fan motor 31 is fixed. A substantially disc-shaped hub 32 swelled like a cylinder, and an intermediate hub 34 that vertically divides a flow path between the shroud 33 and the hub 32, and a plurality of lower blades between the intermediate hub 34 and the shroud 33. 36 is arranged to form a lower fan 37 that sends air to the main air passage 51, and a plurality of upper blades 35 are arranged between the hub 32 and the intermediate hub 34 to send air to the auxiliary air passage 51. It is a so-called two-stage fan to be formed.

  When the lower fan 37 and the upper fan 38 are rotated together by the fan motor 31, indoor air is sucked from the inlets of the shroud 33 and the intermediate hub 34, and subsequently, the heat exchanger 4 is transferred to the heat exchanger 4 as the lower blade 36 rotates. Air is blown radially outward, and air is blown radially toward the inlet 63 as the upper blade 35 rotates. By providing the lower fan 37 for sending air exclusively for the main air passage 51 and the upper fan 38 for sending air exclusively for the auxiliary air passage 61, the heat exchanged air K1 and the air K2 that is not heat exchanged are in an appropriate ratio. It is blown out to prevent excessive air from flowing into the upper auxiliary air passage 61.

  Further, the intermediate hub 34 concentrically defines the upper end of the shroud 33 at the center side, and the height 34a of the outer diameter on the outlet side is matched with the upper end 42 of the heat exchanger 4, so that the blowout opening of the lower fan 37 shown in FIG. By forming 37a to be wider than the blowing opening 38a of the upper fan 38, the air volume blown to the heat exchanger 4 is larger than the air volume blowing to the inlet 63, and accordingly The air volume of the heat-exchanged air K1 increases.

  On the other hand, the number of the upper blades 35 is larger than that of the lower blades 36, so that even if the blowout opening 38a of the upper fan 38 is narrow, it is possible to send high-speed wind, and the air K2 has a larger air volume than the air K1. However, at least the wind speed is increased and the air K1 is reliably suppressed.

  The ceiling-embedded air conditioner of the present invention having the main air passage 51 through which the heat-exchanged air K1 flows and the auxiliary air passage 61 through which the air K2 not heat-exchanged flows as described above is provided at the corners of the four corners of the decorative panel. By providing the auxiliary air outlet 62 through which a part of the air K2 flowing through the auxiliary air passage 61 is guided between the adjacent air outlets 19, the entire outer periphery of the heat-exchanged air K1 blown out from the air outlet 19 As the air K2 that is not heat-exchanged is blown out from both the air outlet 19 and the auxiliary air outlet 62 so as to cover the air, it is possible to cover the entire ceiling 10 with the air K2 that is not heat-exchanged during the cooling operation, thereby preventing smudging. It is effective for heating, and can be suppressed so as to surround the entire circumference of the heat-exchanged air K1 that has been warmed up during heating operation, so that the warm air is wrapped and delivered to the feet without escaping, improving comfort.

  Further, when the blower fan 3 is formed as a two-stage fan including a lower fan 37 that sends air to the main blower passage 51 and an upper fan 38 that sends air to the auxiliary blower passage 61, excess air flows through the auxiliary blower passage 61. This makes it possible to blow out air K1 that has undergone heat exchange and air K2 that has not undergone heat exchange at an appropriate ratio.

1: ceiling-embedded air conditioner, 10: ceiling, 14: partition, 15: decorative panel, 16: air outlet, 19: wind direction plate 2: casing, 23/24: heat insulating member 3: blower fan, 31 : Fan motor, 32: Hub, 33: Shroud, 34: Intermediate hub, 35: Upper blade, 36: Lower blade, 37: Lower fan, 38: Upper fan 4: Heat exchanger 5: Air passage, 51: Main air Path 61: Auxiliary air blowing path, 62: Auxiliary air outlet, 63: Inlet, 64: Auxiliary hole X: Virtual line K1: Heat exchanged air, K2: Air not heat exchanged

Claims (2)

Inside the box-shaped housing, a fan motor, a blower fan pivotally supported by the fan motor, a bell mouth for taking air into the blower fan, and a heat exchanger surrounding the blower fan are arranged, and the housing A partition that divides a main air passage through which heat is exchanged between a body and the heat exchanger and an auxiliary air passage through which air that is not heat-exchanged flows, and has a rectangular plate body at the lower end of the housing In the ceiling-embedded air conditioner provided with a blowout port facing the main air passage and the auxiliary air passage along each side of the square, the panel is attached,
The decorative panel includes an auxiliary air outlet through which a part of the air flowing through the auxiliary air passage is guided between the air outlets adjacent at the corners of the four corners of the decorative panel,
The blower fan includes an annular shroud having an inlet opening facing the bell mouth, a disk-shaped hub in which a central portion to which a shaft of the fan motor is fixed is bulged in a bell shape, the shroud, An intermediate hub that vertically divides a flow path between the hub and a plurality of lower blades disposed between the intermediate hub and the shroud to send the heat-exchanged air to the main air passage A two-stage turbo fan comprising a lower fan and an upper fan for sending a plurality of upper blades between the hub and the intermediate hub to send the non-heat-exchanged air to the auxiliary air passage;
The intermediate hub is formed such that the height of the outer diameter on the outlet side is aligned with the upper end of the heat exchanger, and the blower opening of the lower fan is wider than the blower opening of the upper fan. A ceiling-embedded air conditioner, wherein the number of the air conditioners is greater than that of the lower blade .   2. The ceiling-embedded air conditioner according to claim 1, wherein the auxiliary air outlet is provided outside a virtual line X connecting the outer ends of the air outlet.

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