JP2016038102A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption and a noise value of an air conditioner.SOLUTION: An air conditioner comprises: a body case 1 having a suction port 4 and a blowout port 5; air conditioning means 2 provided in the body case 1; and blower means 3 for blowing out the air sucked from the suction port 4 out of the blowout port 5 via the air conditioning means 2 by an air blowing passage 6. As a lower end part 21a of a side peripheral surface of a motor cover 20 is a circular shape which is concentric with a main plate portion 17 of a fan 15 and which is of the same diameter or of a little smaller dimension, the air blown out of the fan 15 flows to the blowout port 5 without rapidly enlarging or rapidly reducing at the lower end part 21a of the side peripheral surface of the motor cover 20. Thus, the air conditioner can be acquired in which variation of wind velocity of the air flowing in the air blowing passage 6 according to the air passage area is small, increase in pressure loss and occurrence of noise are suppressed, and power consumption and a noise value can be reduced according to that.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an air conditioner provided with a centrifugal fan type air blowing means.

  The configuration of this type of conventional air conditioner has been as follows.

  That is, it is comprised from the main body case which has a suction inlet and a blower outlet, the air conditioning means provided in the main body case, and the ventilation means. The air sucked from the suction port by the blowing means was blown out from the outlet through the air conditioning means by the blowing passage. The blower means includes a motor provided in the blower passage and a fan that is rotated by the motor. The fan is a centrifugal fan that sucks air from the lower part and blows out from the side periphery, and is disposed below the motor. A motor cover that covers the outer shell of the motor is provided above, and the bottom surface of the motor cover is extremely small compared to the outer diameter of the fan, and the top surface of the motor cover is large compared to the bottom surface. Yes, the motor cover was configured to expand from the bottom surface to the top surface.

JP 2013-11434 A

  Such a conventional air conditioner has problems that noise during blowing and power consumption of the motor are high.

  In a conventional product, the air conditioner blows air while drawing a spiral along the outer periphery of the air passage, but the air passage cross-sectional area passes through the side peripheral surface of the bottom of the motor cover after blowing out from the fan. First, it suddenly expands and then shrinks toward the outlet. Depending on the cross-sectional area of the air passage, the wind speed of the air flowing through the air passage decreases and increases, resulting in an increase in pressure loss and abnormal noise, resulting in a problem of increased power consumption and noise level.

  Therefore, the present invention aims to reduce the power consumption and noise level of the air conditioner.

In order to achieve this object, the present invention provides a main body case having a suction port and an outlet, air conditioning means provided in the main body case, and air sucked from the suction port. By air blowing means that blows out from the air outlet through the air conditioning means,
The blower means includes a motor provided in the blower passage and a fan that is rotated by the motor. The fan is a centrifugal fan that sucks air from the lower part and blows out from a side periphery, and the fan is A bowl-shaped main plate portion which is disposed below the motor and has an upper surface opened, a plurality of blade portions extending downward from the lower surface of the main plate portion, and a lower opening provided at the tip of the plurality of blade portions is an upper opening. A smaller cylindrical ring portion, and a motor cover that covers the outer shell of the motor is provided above the fan, and a lower end portion of a side peripheral surface of the motor cover is concentric with the main plate portion of the fan, and It is characterized by a circular shape having the same diameter or a slightly smaller size, thereby achieving reduction in power consumption and noise level.

  According to the present invention, a main body case having a suction port and a blowout port, air conditioning means provided in the main body case, and air sucked from the suction port are circulated through the air conditioning means by a ventilation path. The air blowing means blows out from the air outlet, and the air blowing means includes a motor provided in the air blowing path and a fan rotated by the motor. A centrifugal fan that blows out from the periphery, the fan being disposed below the motor and having a bowl-shaped main plate portion having an upper surface opened, a plurality of blade portions extending downward from the lower surface of the main plate portion, The lower opening provided at the tip of the blade part is composed of a cylindrical ring part smaller than the upper opening, and a motor cover that covers the outer shell of the motor is provided above the fan, The lower end of the side peripheral surface of the serial motor cover, in which is characterized by a circular shape of the main plate portion concentrically in and the same diameter or slightly smaller becomes the size of the fan.

  In this way, the bottom surface of the motor cover is concentric with the main plate portion of the fan and has a circular shape with the same diameter or slightly smaller dimensions, so it rapidly expands when passing through the side peripheral surface of the bottom of the motor cover blown out from the fan Because it flows to the air outlet without being reduced, there is little fluctuation in the air speed of the air flowing through the air passage according to the cross-sectional area of the air passage, and it suppresses the increase in pressure loss and the generation of abnormal noise. Can be reduced.

The perspective view which shows the air conditioning apparatus of Embodiment 1 of this invention. Cross section of the air conditioner Cross section of the air conditioner Detailed sectional view of the air blowing means of the air conditioner

    Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view showing an air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 1 is a perspective view of the main body case as viewed from the back side. FIG. 2 is a cross-sectional view showing the air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view mainly showing the air blowing means and the air conditioning means as viewed from the right side of the main body case. FIG. 3 is a cross-sectional view showing the air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view mainly showing the air blowing means, the air conditioning means, and the tank portion as viewed from the front surface of the main body case.

  As shown in FIGS. 1, 2, and 3, the air conditioner includes a main body case 1, air conditioning means 2 provided in the main body case 1, and air blowing means 3. The air conditioning means 2 and the blower means 3 are provided in a blower passage 6 that connects the suction port 4 and the blower outlet 5.

  The main body case 1 has a horizontally long box shape. A suction port 4 is provided at a lower portion of one side (back side) of the outer peripheral surface of the main body case 1. A blower outlet 5 is provided on the left side of the top surface of the main body case 1 when viewed from the front surface of the main body case 1.

  One example of the air conditioning means 2 is a humidifying unit 7. The humidification unit 7 includes a water storage container 8, a humidification filter 9, and a tank portion 10.

  The water storage container 8 has a bowl shape with an open upper surface, and is detachably provided at a lower portion in the main body case 1. A humidifying filter 9 is attached to the left side of the main body case 1 of the water storage container 8, and a tank portion 10 is attached to the right side of the main body case 1 of the water storage container 8 as viewed from the front. A predetermined amount of water supplied from the tank portion 10 is accumulated in the water storage container 8.

  The humidifying filter 9 has a substantially rectangular tube shape, and has an open top and bottom surface. The humidifying filter 9 is attached to the water storage container 8 so that the lower end is immersed in the water accumulated in the water storage container 8. The humidifying filter 9 sucks up the water accumulated in the water storage container 8, and the entire humidifying filter 9 becomes wet. At least a part of the humidifying filter 9 faces the suction port 4. That is, when the inside of the main body case 1 is viewed from the suction port 4, at least a part of the humidifying filter 9 can be seen.

  The tank portion 10 includes a tank container 11 that can store water, a tank handle 12 provided at the upper part of the tank container 11, and a tank water supply mechanism 13 that supplies water to the humidifying unit 7 provided at the lower part of the tank container 11. Is formed.

  FIG. 4 is a detailed cross-sectional view of the air blowing means of the air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view of the main body case as viewed from the right side.

  As shown in FIGS. 2 and 4, the air blowing unit 3 includes a motor 14 provided above the humidifying filter 9 and a fan 15 that is rotated by the motor 14. The air sucked from the suction port 4 by the air blowing means 3 is blown out from the air outlet 5 through the air conditioning means 2 by the air blowing path 6.

  The vertical cross-sectional shape of the air passage 6 is substantially L-shaped. The air passage 6 first extends in the horizontal direction from the suction port 4 and communicates with the humidifying filter 9. Next, it extends upward from the humidifying filter 9 and communicates with the blowing means 3. Finally, it extends upward from the blowing means 3 and communicates with the outlet 5.

  Then, the flow of the air in an air conditioning apparatus is demonstrated. A suction passage 4, a humidifying filter 9, a blower unit 3, and a blower outlet 5 are arranged in this order in the blower passage 6 that connects the suction port 4 and the blower outlet 5. By the air blowing means 3, the air outside the main body case 1 is sucked from the suction port 4 and blown to the humidifying filter 9. By passing through the side peripheral surface of the humidifying filter 9, it becomes moist air. This moist air is blown into the room from the blowout port 5 through the blowing means 3.

  In addition, the air conditioning means 2 may not be the humidification part 7, and may be a dehumidification part and an air purification part.

  The fan 15 includes a main plate portion 17, a blade portion 18, and a ring portion 19.

  The main plate portion 17 has a bowl shape with an upper surface opened. The blade portion 18 has an arc shape in horizontal cross section, and a plurality of blade portions 18 extend downward from the lower surface of the main plate portion 17. The ring portion 19 has a cylindrical shape in which the lower opening is smaller than the upper opening, and is provided at the tips of the plurality of blade portions 18.

  A motor cover 20 that covers the outer shell of the motor 14 is provided above the fan 15. The bottom surface 21 of the motor cover 20 is concentric with the main plate portion 17 of the fan 15 and has a bowl-like disc shape that follows the shape of the main plate portion 17, and is arranged in a positional relationship that does not interfere with the main plate portion 17 that rotates with the fan 15. Yes.

  The air passage 6 includes a first air passage 22 and a second air passage 23. The first air passage 22 is an air passage that extends from the fan 15 to the lower end portion 21 a (the peripheral end side of the bottom surface 21) of the side peripheral surface of the motor cover 20. The second air passage 23 is an air passage downstream from the first air passage 22 and extending from the lower end portion 21 a of the side peripheral surface of the motor cover 20 to the air outlet 5. The blower outlet 5 includes a plurality of lattices 25. The air blown out from the fan 15 sequentially passes through the first air passage 22, the second air passage 23, and the air outlet 5.

  A feature of the present embodiment is that the lower end portion 21a of the side peripheral surface of the motor cover 20 has a circular shape that is concentric with the main plate portion 17 of the fan 15 and has the same diameter or a slightly smaller size. The slightly smaller shape is considered to be a size reduced by about 10% with respect to the outer diameter of the main plate portion 17.

  That is, in the first air passage 22, the distance between the inner wall 1 a of the main body case 1 and the peripheral end side 17 a of the main plate portion 17 (peripheral portion of the main plate portion 17), and the side wall of the inner wall 1 a and the motor cover 20. There is no significant difference in the distance from the lower end 21a, or there is a tendency to spread slightly from leeward to upwind. As a result, no significant fluctuation occurs in the air passage cross-sectional area of the first air passage 22, and therefore, when air passes through the first air passage 22, an increase in pressure loss due to reduction or rapid expansion of the air passage cross-section occurs. Absent. As a result, it is possible to suppress the increase in pressure loss and the generation of abnormal noise when the first air passage 22 is blown, and to reduce the power consumption and the noise value.

  The motor cover 20 has a substantially cylindrical shape with a central axis extending in the vertical direction.

  That is, the air blown out from the fan 15 is directed to the outlet 5 through the first air passage 22 and the second air passage 23 while drawing a spiral. Here, since the motor cover 20 has a substantially cylindrical shape, the distance between the inner wall 1a of the main body case 1 which is the wall surface constituting the second air passage 23 and the side peripheral surface of the motor cover 20 is remarkably from leeward to windward. Does not fluctuate. That is, since the air passage cross-sectional area of the second air passage 23 does not change significantly, the air passage area does not increase or the pressure loss increases due to rapid expansion when the air passes through the second air passage 23. Thereby, the increase in the pressure loss in the 2nd ventilation path 23 and generation | occurrence | production of unusual noise can be suppressed, and power consumption and a noise value can be reduced.

  Even if the distance between the inner wall 1a of the main body case 1 which is the wall surface constituting the second air passage 23 and the side peripheral surface of the motor cover 20 tends to gradually spread from the leeward to the windward, When there is no significant change in the airway cross-sectional area of the path 23, the same effect is obtained.

  Moreover, the substantially cylindrical shape includes a shape in which a part of the columnar shape is cut out. The notched shape includes an inclined surface 30 extending downward from the top surface so as to cut off the corner of the top surface 24 of the motor cover 20.

  That is, even in the case of such a cut-out shape, the distance between the inner wall 1a of the body case 1 which is the wall surface constituting the second air passage 23 and the side peripheral surface of the motor cover 20 extends from the leeward to the windward. If the air does not fluctuate or has a tendency to gradually spread from the leeward to the windward, the air loss does not increase or the pressure loss increases due to the rapid reduction or expansion of the air passage area when passing through the second air passage 23. Thereby, the increase in the pressure loss in the 2nd ventilation path 23 and generation | occurrence | production of unusual noise can be suppressed, and power consumption and a noise value can be reduced.

  In general, for example, the height of the motor cover 20 is reduced as much as possible, and the top surface 24 of the motor cover 20 is formed in a semi-spherical or onion shape so that the central portion of the second air passage 23 is also an air passage. The cross-sectional area becomes larger, and the cross-sectional area of the air passage becomes wider. Thus, although it is considered that the effect of noise reduction by suppressing the pressure loss when the air passes can be expected, the shape described in the first embodiment has the effect of noise reduction as an actual effect.

  Although there is a point that has not been elucidated, when the top surface 24 of the motor cover 20 is formed in a hemispherical shape or an onion shape, the central portion of the second air passage 23 is opened, so that the second force is generated by the centrifugal force due to the spiral. It is considered that a phenomenon in which the air flowing toward the outer peripheral method of the second air passage 23 is drawn to the central portion method of the second air passage 23 in the opposite direction due to the pressure difference and the air flow becomes unstable.

  Therefore, the distance between the inner wall 1a of the main body case 1 which is the wall surface constituting the second air passage 23 and the side peripheral surface of the motor cover 20 does not vary from the leeward to the windward, or gradually increases from the leeward to the windward. Then, since there is no significant change in the air passage area of the second air passage 23, when the air passes through the second air passage 23, an increase in pressure loss due to reduction or rapid expansion of the air passage area occurs. Absent. Thereby, the increase in the pressure loss in the 2nd ventilation path 23 and generation | occurrence | production of unusual noise can be suppressed, and power consumption and a noise value can be reduced.

  Further, by providing a flat portion on the top surface 24 of the motor cover 20, the air flow from the side peripheral surface of the motor cover 20 to the lattice 25 above the motor cover 20 can be stabilized, and pressure loss can be reduced. The increase can be suppressed. As an example, the fixed distance above the top surface 24 is considered to be about 5 mm to 15 mm.

  Moreover, the blower outlet 5 is comprised by the some grating | lattice 25 extended in the up-down direction. The lower end of the lattice 25 is disposed at a position away from the flat portion provided on the top surface 24 of the motor cover 20 by a certain distance.

  Thus, the air blown while drawing a spiral along the second air passage 23 passes between the plurality of lattices 25 of the air outlet 5 and is blown into the room. For example, when the lattice 25 and the motor cover 20 are close to or in contact with each other, the cross-sectional area when passing through the air outlet 5 is determined from the cross-sectional area of the outer peripheral wall of the second air passage 23. The area obtained by further reducing the cross-sectional area of the lattice 25 from the area obtained by reducing the cross-sectional area. However, by providing a certain distance between the lower end of the grid 25 and the top surface 24 of the motor cover 20, the cross-sectional area when passing through the outlet 5 is determined from the cross-sectional area of the outer peripheral wall of the second air passage 23. The area obtained by reducing the cross-sectional area of 25. That is, since an area corresponding to the cross-sectional area of the motor cover 20 above the top surface 24 can be utilized as a part of the second air passage 23, an increase in pressure loss can be suppressed.

  The main plate portion 17 of the fan 15 includes a ring-shaped ring-shaped rib 26 concentric with the main plate portion 17 on the upper surface. The ring-shaped rib 26 has an outer diameter dimension that is smaller than the bottom surface 21 of the motor cover 20, and the upper end side is disposed without leaving a distance from the bottom surface of the bottom surface 21 of the motor cover 20. It should be noted that the phrase “arranged with no substantial distance” means that the ring-shaped ribs 26 are separated from the bottom surface 21 to such an extent that they can rotate together with the fan 15.

  Thus, when air is blown from the fan 15 to the first air passage 22, a part of the air flows between the bottom surface 21 of the motor cover 20 and the main plate portion 17 of the fan 15, but the ring-shaped rib 26. Since a part of the air is shielded, the airflow flowing from the fan 15 to the first air passage 22 is stabilized, and an increase in pressure loss can be suppressed. Therefore, noise during blowing and power consumption of the motor can be reduced.

  Further, the upper end of the ring-shaped rib 26 is disposed above the peripheral edge 17 a of the main plate portion 17.

  Thereby, even when tap water intrudes from the outlet 5 due to carelessness of the user and the tap water accumulates on the upper surface of the main plate portion 17 due to the drip water from the lower end portion 21a via the side peripheral surface of the motor cover 20. By providing the ring-shaped rib 26, the tap water is stored between the peripheral edge 17 a of the main plate portion 17 and the ring-shaped rib 26, and the tap water is not allowed to enter the central portion of the main plate portion 17.

  Further, when the drip water further advances and the water level of the accumulated tap water rises, it is drained from the peripheral edge 17a of the main plate portion 17 to the outside of the main plate portion 17 before exceeding the upper end of the ring-shaped rib 26. The tap water can be prevented from entering the central portion of the main plate portion 17. As a result, the motor 14 and the fan 15 are connected by the shaft 27 provided in the motor 14 and the shaft hole 28 provided in the central portion of the main plate portion 17, but tap water does not enter the central portion of the main plate portion 17. The occurrence of rust on the shaft 27 can be prevented.

  In addition, when the motor 14 and the main plate portion 17 are arranged close to each other, the motor 14 is positioned below the water surface. Even in this case, the motor 14 is not submerged, and therefore the motor 14 is rusted. The generation of rust can be prevented, and the rotation failure of the motor caused by the occurrence of rust can be prevented in advance.

  The motor cover 20 has a concave portion 29 that is recessed upward in the lower surface of the bottom surface 21, and the concave portion 29 is disposed in a positional relationship in which a part of the upper end of the ring-shaped rib 26 of the fan 15 is inserted. The shape of the recess 29 is configured so as not to interfere with the rotation of the ring-shaped rib 26.

  Thereby, when tap water intrudes from the blower outlet 5 by carelessness of the user, depending on the shape of the bottom surface 21, the tap water passes through the side peripheral surface of the motor cover 20 and the bottom surface 21 due to surface tension from the lower end 21a. The intrusion extends until the rise of the outer periphery of the recess 29, and as a result, the portion where the tap water accumulates extends from the lower end 21a of the side peripheral surface of the motor cover 20 to the outer periphery of the recess 29. Can be limited. Further, when the tap water collected from that portion drops, it can be collected between the peripheral edge 17a of the main plate portion 17 of the fan 15 disposed below and the ring-shaped rib 26, so that the center of the main plate portion 17 is stored. Do not allow tap water to enter the area. Moreover, when the water level of the tap water collected by further proceeding with the drip water rises, it is drained from the peripheral edge 17a of the main plate portion 17 to the outside of the main plate portion 17 before exceeding the upper end of the ring-shaped rib 26. The tap water can be prevented from entering the central portion of the main plate portion 17.

  As a result, the tap water does not enter the central portion of the main plate portion 17, thereby preventing the shaft 27 from generating rust. Further, when the motor 14 and the main plate portion 17 are close to each other, the generation of rust due to the submersion of the motor 14 can be prevented, and the rotation failure of the motor 14 caused by the generation of rust can be prevented.

  An air conditioner according to the present invention includes a main body case having a suction port and a blower outlet, air conditioning means provided in the main body case, and air sucked from the suction port by means of an air passage. Air blowing means that blows out from the air outlet through the means, and the air blowing means comprises a motor provided in the air blowing path and a fan rotated by the motor, and the fan sucks air from below. And a centrifugal fan that blows out from the side periphery, the fan being disposed below the motor and having a bowl-shaped main plate portion having an upper surface opened, a plurality of blade portions extending downward from the lower surface of the main plate portion, The lower opening provided at the tip of the blade portion is formed of a cylindrical ring portion smaller than the upper opening, and a motor cover that covers the outer shell of the motor is provided above the fan. The lower end portion of the side peripheral surface of the motor cover is a concentric circle with the same diameter or slightly smaller than the main plate portion of the fan, and is characterized by an increase in pressure loss and It is useful as an air conditioner that can suppress the generation of abnormal noise and reduce power consumption and noise level accordingly.

DESCRIPTION OF SYMBOLS 1 Main body case 1a Inner wall 2 Air conditioning means 3 Air blowing means 4 Suction port 5 Air outlet 6 Air supply path 7 Humidification part 8 Water storage container 9 Humidification filter 10 Tank part 11 Tank container 12 Tank handle 13 Tank water supply mechanism 14 Motor 15 Fan 17 Main plate part 17a peripheral edge 18 blade part 19 ring part 20 motor cover 21 bottom surface 21a lower end part 22 first air passage 23 second air passage 24 top surface 25 lattice 26 ring-shaped rib 27 shaft 28 shaft hole 29 recess 30 inclined surface

Claims (6)

A main body case having a suction port and an air outlet, air conditioning means provided in the main body case, and air sucked from the suction port is blown out from the air outlet through the air conditioning means by a blower passage. The blower means is composed of a motor provided in the blower passage and a fan rotated by the motor, and the fan is a centrifugal fan that sucks air from the lower part and blows out from the side periphery. And the fan is disposed below the motor, and has a bowl-shaped main plate portion having an open upper surface, a plurality of blade portions extending downward from the lower surface of the main plate portion, and provided at the tips of the plurality of blade portions. The motor cover includes a motor cover that covers the outer shell of the motor above the fan. The lower end of the side peripheral surface, an air conditioner which is a circular shape of the main plate portion concentrically in and the same diameter or somewhat small dimensions of the fan. The air conditioner according to claim 1, wherein the motor cover has a substantially cylindrical shape. The air outlet of the main body case includes a plurality of grids extending in the vertical direction, the top surface of the motor cover is provided at a position spaced apart from the lower ends of the plurality of grids by a certain distance, The air conditioner according to claim 1 or 2, wherein the top surface has a flat portion. The upper surface of the main plate portion of the fan includes a ring-shaped ring-shaped rib concentric with the main plate portion, and the outer diameter of the ring-shaped rib is smaller than the bottom surface of the motor cover. The air conditioning apparatus according to any one of claims 1 to 3. The air conditioner according to claim 4, wherein an upper end of the ring-shaped rib is located above a peripheral end side of the main plate portion. The motor cover is provided with a recess on the bottom surface, and the recess is disposed so that a part of the upper end of the ring-shaped rib of the fan is inserted therein, and the shape of the recess is used to rotate the ring-shaped rib. The air conditioner according to claim 4 or 5, wherein the air conditioner does not interfere.

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