JP2007078219A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner improved in distribution of the air flowing into an air inlet of a sirocco fan, and preventing generation of abnormal noise. <P>SOLUTION: This air conditioner comprising the sirocco fan 23, further comprises a straightening vane 29 vertically mounted on a partitioning plate 26 face provided with a bell-mouth 27, at an outer side of the bell-mouth 27. The straightening vane 29 is mounted in the bell-mouth 27 at a side (lower side) near an air trunk 28 where the air sucked by the sirocco fan 23 flows. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner including an air purifier, a dehumidifier, a vaporizing humidifier, and the like, and more particularly to an air path on the inlet side of a sirocco fan.

Conventionally, this type of air conditioner uses a sirocco fan unit as a suction fan. Generally, the sirocco fan unit has a large amount of suction near the bell mouth and above the bell mouth. However, when the sirocco fan unit installed in the air conditioner adopts a structure that sucks air from below the unit, the inflow from the bottom of the bell mouth opening increases, and the flow rate is essentially high and the flow rate is high. Air hardly flows into the area above the opening. Therefore, the predetermined air blowing function of the fan cannot be obtained, and the blowout amount is reduced. For this reason, in order to obtain a predetermined air volume, the number of rotations of the fan has to be increased, which increases the power consumption of the fan motor and increases the operating noise. As a centrifugal fan device that solves such a problem, for example, “the airflow flowing through the passage region W2 formed by the partition guide member 23 in the suction passage 22 reaches the back of the suction passage 22 and is sucked into the suction port 10. Therefore, the sirocco fan 1 can sufficiently suck the gas from the region behind the suction passage 22 and can suck the gas in a well-balanced manner from the entire region of the suction port 10, thereby reducing noise. The air volume can be increased and surging can be prevented from occurring. Precursion is given by the curved portion 23a of the partition guide member 23 "(see Patent Document 1).
Japanese Patent Laid-Open No. 2001-99094 (Abstract, FIGS. 1 and 2)

  In the conventional centrifugal fan device (Patent Document 1), since the air guide plate is disposed across the opening of the suction port, the air flowing along the arc of the bell mouth is partially blocked while turning. Therefore, there is a problem that abnormal sounds such as wind noises are generated near the fan blades passing near the shut-off point, causing an increase in operating noise.

  The present invention has been made to solve such problems, and at least provides an air conditioner that improves the distribution of air sucked into the air intake and prevents abnormal noise from being generated. With the goal.

  An air conditioner according to the present invention is an air conditioner provided with a sirocco fan, wherein the sirocco fan is provided with a rectifier standing on a surface where an air inlet is formed, and at least one rectifier disposed outside the air inlet. The rectifying plate is disposed on the side of the air inlet near the air passage through which air sucked by the sirocco fan flows.

  According to the present invention, the rectifying plate is erected on the surface where the intake port of the sirocco fan is formed and is disposed outside the intake port, and the air flowing through the air sucked by the sirocco fan in the intake port flows. By arranging it on the side close to the road, air from the air path is rectified (guided) by the baffle plate and flows into the intake port, improving the flow velocity distribution of the inflow air at the intake port, and in the circumferential direction of the sirocco fan The work applied to the fan blades of the fan is made uniform, and the work efficiency of the sirocco fan is improved. For this reason, the number of rotations of the fan for obtaining a predetermined air volume can be reduced, the operation sound can be reduced, and the power consumption of the motor for driving the sirocco fan can be reduced. In addition, the rectifying plate is located outside the intake port and does not interfere with the arc of the intake port, so it does not interfere with the swirling flow that flows into the sirocco fan from the intake port. It is not a cause.

Embodiment 1 FIG.
1A and 1B are a perspective view and a cross-sectional explanatory view of an air cleaner according to Embodiment 1 of the present invention. As shown in FIG. 1A, the air cleaner 10 includes an intake port 12 formed on the front surface of the main body 11, for example, and an exhaust port 13 formed on the upper surface of the main body 11. Further, as shown in FIG. 1B, a filter 21 for collecting dust, deodorizing and the like is provided in the main body 11 and an electronic component or the like is mounted on the upper portion. A substrate 22 is provided. A sirocco fan 23 and a motor 24 for driving the sirocco fan 23 are provided in the central portion of the main body 11, and the sirocco fan 23 rotates by rotating the motor 24, sucks air and exhausts it to the exhaust port 13. . The sirocco fan 23 is covered with a casing 25. A partition plate 26 is provided at the front portion of the sirocco fan 23, and an opening is formed in a portion of the partition plate 26 facing the sirocco fan 23, and this opening corresponds to an inlet of the sirocco fan 23. A bell mouth 27 is formed. The partition plate 26 may be configured as a part of the casing 25. A space for forming an air passage 28 is provided between the lower portions of the casing 25 and the partition plate 26 and the bottom of the main body 11. The casing 25, the partition plate 26, and the inner wall of the main body 11 form an air passage 28 in the main body 11 until the air that has exited the filter 21 reaches the sirocco fan 23. It has a letter shape. Therefore, the air exiting the filter 21 once flows downward and then flows upward toward the bell mouth 27 side. A pair of rectifying plates 29 are attached to both sides of the bell mouth 27 so as to connect the partition plate 26 and the inner wall of the main body 11, and the air that flows upward toward the bell mouth 27 side. Is rectified by the rectifying plate 29 and sucked into the sirocco fan 23 via the bell mouth 27. Details of the current plate 29 will be described with reference to FIG.

  FIGS. 2A and 2B are a perspective view of the current plate and an explanatory view showing the flow of air by the current plate. As shown in FIG. 2A, the rectifying plate 29 is disposed on the side close to the air passage 28 into which the air sucked by the sirocco fan 23 flows in the bell mouth 27. In this example, the bell mouth 27 It is disposed on the lower side of the bell mouth 27 and provided on the partition plate 26 outside the bell mouth 27. The height of the rectifying plate 29 is set so that the upper end portion thereof is between, for example, the center position of the bell mouth 27 and a position corresponding to 3/4 of the diameter of the bell mouth 27. As shown in FIG. 2 (b), a part of the air that exits the air passage 28 on the lower side of the partition plate 26 and flows upward flows inside the pair of rectifying plates 29, so that the bell mouth 27 Although it is drawn to the lower side, the other part flows outside the pair of rectifying plates 29 and is drawn to the upper side of the bell mouth 27.

  Next, the operation of the air cleaner according to the first embodiment will be described. When the motor 24 rotates, the sirocco fan 23 rotates accordingly. As the sirocco fan 23 rotates, air is sucked from the air inlet 12, the sucked air is purified by the filter 21, and the purified air is rectified by the pair of rectifying plates 29 via the air passage 28 (FIG. 2 (b)), the air drawn into the sirocco fan 23 through the bell mouth 27 and then purified air is exhausted from the exhaust port 13.

  As described above, in the first embodiment, the pair of rectifying plates 29 are arranged perpendicular to the surface of the partition plate 26 where the bell mouth 27 is formed and outside the bell mouth 27, and Among them, the air from the air passage 28 is rectified (guided) by the rectifying plate 29 by being arranged in parallel to the air passage 28 side (lower side in this example) through which the air sucked by the sirocco fan 23 flows. Accordingly, the flow velocity distribution of the inflow air of the bell mouth 27 is improved, the work applied to the fan blades in the circumferential direction of the sirocco fan 23 is made uniform, and the work efficiency of the sirocco fan 23 is improved. For this reason, the rotation speed of the sirocco fan 23 for obtaining a predetermined air volume can be reduced, the operation sound can be reduced, and the power consumption of the motor 24 can be reduced. Further, since the rectifying plate 29 is disposed outside the bell mouth 27 and does not interfere with the arc of the bell mouth 27, it does not hinder the swirling flow flowing from the bell mouth 27 into the sirocco fan 23. It is not a cause of abnormal noise.

  In addition, the pair of rectifying plates 29 are attached so as to connect the partition plate 26 on which the bell mouth 25 is formed and the inner wall of the main body 11 forming the air passage 28, whereby the main body (housing). 11, the strength of the main body 11 is increased, and deformation of the peripheral portion of the bell mouth 27, which is easily applied with the load of the motor 24 and the sirocco fan 23, can be prevented. Thereby, the strength of the main body 11 can be increased without providing a dedicated part for increasing the strength of the main body 11 or increasing the thickness of the parts of the main body 11. Can be prevented.

  Moreover, the height of the pair of rectifying plates 29 is set so that the end portions thereof are located at 1/2 to 3/4 of the diameter of the bell mouth 27. The air flowing in from the side) can be efficiently rectified (guided) above the bell mouth 27, and the flow velocity distribution of the inflowing air in the bell mouth 27 can be further improved.

Embodiment 2. FIG.
FIG. 3 is an explanatory view showing a modification of the current plate. The same as the first embodiment described above in that the pair of rectifying plates 29 are arranged outside the bell mouth, but the intermediate portion is formed in a circular arc shape 29a concentric with the bell mouth 27, The upper end portion 29b is bent toward the bell mouth 27 side. By adopting such a shape as the pair of rectifying plates 29, the resistance of the air flowing into the bell mouth 27 is reduced and the air flows smoothly, and the distribution of the air flowing into the bell mouth 27 is made more uniform. Will be. In addition, the structure of FIG. 3 allows the interval on the inlet side of the rectifying plate 29 to be arbitrarily set regardless of the diameter of the bell mouth 27, so that the bell mouth can be more flexibly combined with the height adjustment of the rectifying plate 29. 27 The flow rate leading upward can be adjusted.

Embodiment 3 FIG.
4 (a) and 4 (b) are a perspective view and a cross-sectional explanatory view of a dehumidifier according to Embodiment 3 of the present invention. As shown in FIG. 4A, the dehumidifier 30 includes an intake port 32 formed on the front surface of the main body 31 and an exhaust port 33 formed on the upper surface of the main body 31. Further, as shown in FIG. 4B, a filter 41 for collecting dust, deodorizing and the like is provided in the main body 31, and a heat exchanger 42 is provided behind the filter 41. is set up. Further, a partition plate 43 is provided behind the heat exchanger 42, an opening is formed in the partition plate 43, and a bell mouth 44 is formed in the opening. A sirocco fan 45 and a motor 46 for driving the sirocco fan 45 are provided to face the bell mouth 44, and exhaust air from the sirocco fan 45 is exhausted from the exhaust port 33. On both sides of the bell mouth 44, a pair of rectifying plates 29 having the same form as those shown in the first and second embodiments are arranged upright, and the rectifying plates 29 are arranged to exchange heat. The air flow sucked to the bell mouth 44 side through the vessel 42 is rectified (guided). The pair of rectifying plates 29 is disposed on the side close to the air passage 49 into which the air sucked by the sirocco fan 45 flows (the upper side in this example) of the bell mouth 44. In this example, the bell mouth 44 is arranged on the upper side. In addition, a water storage tank 47 and a compressor 48 are disposed below the heat exchanger 42. The water storage tank 47 stores water generated by dehumidification by the heat exchanger 42, and the compressor 48 compresses the refrigerant. And supplied to the heat exchanger 42. In this dehumidifier 30 as well, the air passage 49 from the heat exchanger 42 to the exhaust port 33 is formed in a U-shaped cross section.

  Next, the operation of the dehumidifier 30 according to the third embodiment will be described. When the motor 46 is rotated, the sirocco fan 45 is thereby rotated. As the sirocco fan 45 rotates, air is sucked from the air inlet 32, the sucked air is purified by the filter 41, and the purified air is dehumidified by the heat exchanger 42 and then rectified by the pair of rectifying plates 29. (See FIG. 2 (b)), the air drawn into the sirocco fan 45 through the bell mouth 44 and then dehumidified from the exhaust port 33 is exhausted. The water generated by dehumidification by the heat exchanger 42 is stored in the water storage tank 45. Although the dehumidifier 30 performs dehumidification in this way, in particular, by providing the pair of rectifying plates 29, the same effect as in the first and second embodiments can be obtained.

Embodiment 4 FIG.
5 (a) and 5 (b) are a perspective view of a humidifier according to Embodiment 4 of the present invention and an explanatory cross-sectional view thereof. The humidifier 50 has the same basic configuration as the air cleaner 10 of the first embodiment, and is different in that a vaporization filter 51 and a member (not shown) associated therewith are arranged in the air path 28. To do. When the motor 24 rotates, the humidifier 50 also rotates the sirocco fan 23, and the air is sucked from the intake port 12 by the rotation of the sirocco fan 23, and the sucked air is purified by the filter 21 and purified. Air passes through the vaporization filter 51 via the air passage 28. The dried air passes through the vaporizing filter 51 and becomes water-containing, and is rectified by a pair of rectifying plates 29 (see FIG. 2B) and drawn into the sirocco fan 23 through the bell mouth 27. Later, the air is exhausted from the exhaust port 13 to humidify the room. In the humidifier 50, humidification is performed in this way. In particular, by providing the pair of rectifying plates 29, the same effect as in the first and second embodiments can be obtained.

Embodiment 5. FIG.
FIG. 6 is an explanatory view showing another configuration example of the rectifying plate according to Embodiment 5 of the present invention. In each of the above-described embodiments, the example in which the pair of rectifying plates 29 are provided has been described. However, the rectifying plate 29 may be one. Although the attachment of the baffle plate 29 for balancing the inflow of air to the bell mouth 27 is optional, it is preferably formed on the side of the casing 28 opposite to the tongue 25a. Since the tongue 25a side of the casing 28 is efficient, the air inflow may be small. For this reason, the whole balance can be achieved by guiding more air to the side opposite to the tongue 25a.

It is the perspective view of the air cleaner which concerns on Embodiment 1 of invention, and its cross-sectional explanatory drawing. It is the perspective view of a baffle plate, and explanatory drawing which showed the flow of the air by a baffle plate. It is explanatory drawing which showed the modification of the baffle plate. It is a perspective view of the dehumidifier which concerns on Embodiment 3 of this invention, and its cross-section explanatory drawing. It is a perspective view of the humidifier which concerns on Embodiment 4 of this invention, and its cross-sectional explanatory drawing. It is explanatory drawing which showed the other structural example of the baffle plate which concerns on Embodiment 5 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air cleaner, 11 Main body, 12 Inlet port, 13 Exhaust port, 21 Filter, 22 Substrate, 23 Sirocco fan, 24 Motor, 25 Casing, 26 Partition plate, 27 Bell mouth, 28 Air passage, 29 Current plate, 30 Dehumidification Machine, 31 body, 32 air inlet, 33 air outlet, 41 filter, 42 heat exchanger, 43 partition plate, 44 bell mouth, 45 sirocco fan, 46 motor, 47 water storage tank, 48 compressor, 49 air passage, 50 humidification Machine, 51 Evaporation filter.

Claims (6)

In an air conditioner equipped with a sirocco fan,
The sirocco fan has at least one rectifying plate standing on the surface where the air inlet is formed and disposed outside the air inlet;
The air conditioner is characterized in that the rectifying plate is disposed on a side close to an air passage through which air sucked by the sirocco fan flows in the air inlet.   The air conditioner according to claim 1, wherein a pair of the rectifying plates are arranged outside the intake port.   The air conditioner according to claim 2, wherein the pair of rectifying plates are arranged in parallel to the intake direction.   The air conditioner according to any one of claims 1 to 3, wherein the current plate includes a curved surface along a curve of the suction port.   The air according to any one of claims 1 to 4, wherein the rectifying plate connects a plate member in which the intake port is formed and a plate member that forms an air passage corresponding to the member. Harmony machine. The height of the rectifying plate is set so that the upper end portion is at a position of ½ to ¾ of the diameter of the suction port. Air conditioner.

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