JP2013036460A - Cool breeze machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy-saving cool breeze machine used for a feeling of coolness by agitation or airflow of indoor air for a residence, which can provide the feeling of coolness by air flow in a wide range.SOLUTION: High-pressure air generated from a centrifugal impeller 1 is effectively sent in the longitudinal direction of an airflow outlet without, e.g., being recovered air pressure by a diffuser. Accordingly, the inside of the airflow outlet can be filled with high-pressure air at a low input. As a result, the feeling of coolness can be provided by airflow in the wide range with energy saving.

Description

  The present invention relates to a cool air fan such as a fan or a ceiling fan that is installed on a ceiling in a living room and is used for reducing the temperature of the body due to direct wind and circulating indoor air.

  Conventionally, this type of cool air blower is known in which an impeller and a motor are included in a base part serving as a base, and blown in a horizontal direction with respect to a floor surface from an elliptical ring-shaped air blowing part provided at the upper part of the base part. (For example, refer to Patent Document 1).

  Hereinafter, the cool air machine will be described with reference to FIGS.

  As shown in FIG. 6, the cool air blower is in the form of a portable portable tower fan that includes a base 101 and an air outlet in the form of a nozzle 102 mounted and supported on the base 101.

  FIG. 7 shows a cross-sectional view of the base 101. In the base 101, an impeller 104 for drawing air from the cylindrical grill 103 into the base 101, a motor 105 for rotating the impeller 104, and a rotating shaft 106 for transmitting the shaft power of the motor 105 to the impeller 104 are arranged. ing. The air pressurized by the impeller 104 is converted into pressure by the diffuser 107 located downstream of the impeller 104 and having spiral blades, and is sent to the nozzle 102 as high-pressure air.

  As shown in FIG. 6, the nozzle 102 has an elongated annular shape and forms an elongated opening 108. The nozzle 102 has a mouth 109 that blows out the high-pressure air generated from the impeller 104, a Coanda surface 110 that orients the air discharged from the mouth 109, and is positioned downstream of the Coanda surface 110 and is oriented by the Coanda surface 110. The diffuser surface 111 expands the area of the air. Further, a guide surface 112 that further assists in efficient airflow from the opening 108 is installed further downstream of the diffuser surface 111.

  FIG. 8 shows an exploded view of the nozzle 102. The nozzle 102 includes a casing that includes an elongated annular outer casing section 114 that is connected to and extends from an elongated annular inner casing section 113 to form an annular interior passage for the nozzle 102.

  FIG. 9 shows an enlarged view of a portion surrounded by a dotted line in FIG. Nozzle 102 includes a plurality of fixed guide vanes 115 positioned within the internal passage and each for directing a portion of the high pressure airflow to mouth 109. When the guide vane 115 is not present, most of the high-pressure air tends to leave the nozzle 102 through the upper portion of the mouth 109 and exit upward from the mouth 109 at an acute angle with the central axis of the opening 108. As a result, there will be an uneven distribution of air in the air flow generated by the nozzle 102. Further, most of the high pressure air from the nozzle 102 is not properly diffused by the diffuser surface 111, resulting in a flow of air with much greater turbulence.

JP 2010-203452 A

  In such a conventional cool air blower, the air sucked from the cylindrical grill is boosted in the impeller, and then the swirl flow is converted into pressure by the subsequent diffuser and reaches the internal passage of the nozzle to reach the air passage. The cross-sectional area is rapidly expanded. Thereafter, the air passage cross-sectional area is rapidly reduced at the mouth.

  When the airway cross-sectional area is rapidly reduced, the flow speeds up and the pressure gradient becomes negative along the airway. Since the flow is pushed in the flow direction by the force due to the pressure difference and flows along the wall surface, it suffers a loss due to friction loss with the wall surface. Further, when the cross-sectional area of the air passage rapidly increases, the flow is decelerated and the pressure increases along the air passage. In this case, the flow in the vicinity of the wall surface is lost because the kinetic energy of the flow is lost due to the wall surface friction. Furthermore, when the pressure rise along the air path cannot be overcome, the flow near the wall flows backward, causing separation of the wall boundary layer, and the flow is swirled, resulting in increased flow loss.

  As described above, the conventional cool air blower has a problem that the loss due to the rapid expansion and contraction of the flow is large, and the high-pressure air cannot be efficiently blown to the nozzle.

  In addition, the impeller uses a mixed flow impeller because of the air path configuration, but the static pressure of the mixed flow impeller alone cannot overcome the nozzle static pressure, and a diffuser is installed in the subsequent stage to restore the pressure. ing. When the pressure is restored, a flow loss occurs, which causes a reduction in the efficiency of the impeller.

  Furthermore, changing the wind direction of the high-pressure air by the guide vanes also causes the flow separation. In particular, when the nozzle has an elongated annular shape, a wind speed component in the longitudinal direction of the nozzle, which is substantially perpendicular to the guide vane, develops, and this influence becomes significant.

  Therefore, the present invention solves the above-described conventional problems, and it is possible to reduce the pressure loss of the air passage with a configuration with less rapid expansion and contraction of the flow, so that it is elongated with low input and low loss. The object is to provide a cooler that fills the inside of the nozzle with high-pressure air, eliminates the need for pressure recovery by a diffuser, and does not need to change the direction of the wind by a guide vane, and that can provide a refreshing sensation due to airflow in a wide range.

  And in order to achieve this object, the present invention comprises a suction port for taking air into the box, an impeller for generating high-pressure air, and a high-pressure air generating means comprising a motor for driving the impeller, An annular shape having a duct portion connected to the high pressure air generating means and serving as an air passage for high pressure air sent from the high pressure air generating means, and an outlet for connecting the duct portion and blowing high pressure air as an air flow. A cool air blower configured to attach the high-pressure air generating means to a ceiling, wherein the impeller sucks air in a rotation axis direction by rotation and blows air in a centrifugal direction The vehicle has a configuration in which the airflow blowing portion has an elongated ring shape whose longitudinal direction is the centrifugal direction, thereby achieving an intended purpose.

  According to the present invention, the suction port for taking air into the box, the impeller for generating high-pressure air and the high-pressure air generating means comprising the motor for driving the impeller, and the high-pressure air generating means are connected. A duct portion serving as an air passage for high-pressure air sent from the high-pressure air generating means, and an annular airflow blowing portion connected to the duct portion and having a blowout port for blowing out high-pressure air as an airflow, The high-pressure air generating means is a cool air blower configured to be attached to a ceiling, wherein the impeller is a centrifugal impeller that sucks air in a rotation axis direction by rotation and blows air in a centrifugal direction, and the air flow blowing unit However, by adopting a configuration that has a long and narrow ring shape with the centrifugal direction as the longitudinal direction, it is possible to reduce the pressure loss of the air passage by a configuration with less rapid expansion and contraction of the flow. Therefore, it is possible to satisfy low input, an elongated nozzle with a low loss at high pressure air. In addition, because of the low pressure loss, there is no need to restore the pressure by the diffuser or change the wind direction by the guide vane.

The perspective view from the upper direction which shows the cool air blower of Embodiment 1 of this invention Sectional perspective view which shows the cool air fan of Embodiment 1 of this invention The perspective view from the downward direction which shows the cool air blower of Embodiment 1 of this invention Sectional top view which shows the cool air fan of Embodiment 1 of this invention Sectional drawing which shows the airflow blowing part of Embodiment 1 of this invention Perspective view showing a conventional cool air blower Sectional view showing the base of a conventional cool air blower Exploded view showing the nozzle of a conventional cool air blower Enlarged view showing a guide vane of a conventional cool air blower

  The cool air blower according to claim 1 of the present invention comprises a suction port for taking air into the box, an impeller for generating high-pressure air, and a high-pressure air generating means comprising a motor for driving the impeller, A ring-shaped airflow having a duct portion connected to the high-pressure air generating means and serving as an air passage for the high-pressure air sent from the high-pressure air generating means, and an air outlet for connecting the duct portion and blowing out the high-pressure air as an airflow A cool air blower configured to attach the high-pressure air generating means to a ceiling, wherein the impeller sucks air in a rotation axis direction by rotation and blows air in a centrifugal direction And the air flow blowing portion has a configuration in which it has an elongated ring shape whose longitudinal direction is the centrifugal direction.

  As a result, the pressure loss in the air passage can be reduced with a configuration with little rapid expansion and contraction of the flow, so that the elongated nozzle can be filled with high-pressure air with low input and low loss. In addition, because of the low pressure loss, there is no need to restore the pressure by the diffuser or change the wind direction by the guide vane.

  Further, the relationship between the diameter d of the centrifugal impeller and the width w in the centrifugal direction of the airflow blowing portion may be d ≧ w.

  As a result, the cross-sectional area of the air passage from the impeller to the air outlet gradually decreases, so that there is little rapid expansion and contraction of the flow, and there is an effect that a refreshing feeling can be obtained by airflow in a wide range with energy saving.

  Moreover, you may make it the structure of providing two or more said airflow blowing parts, and arrange | positioning mutually symmetrically with respect to the rotating shaft of the said motor.

  Thus, by providing a plurality of air flow blowing portions in the direction of blowing high-pressure air generated from the centrifugal impeller, the air volume can be easily increased without changing the longitudinal distance of the air flow blowing portions, so energy saving With this, there is an effect that a refreshing feeling can be obtained by airflow over a wide area.

  Moreover, you may make it the structure that the said duct part has a tongue part.

  As a result, high-pressure air generated from the centrifugal impeller can be efficiently sent to the airflow blowing section, and noise can be reduced, so that an energy-saving, low-noise and comfortable space can be formed. Play.

  Further, the air flow blowing unit may have a chamber for holding high-pressure air.

  As a result, the chamber becomes a buffer space that adjusts the pressure of the high-pressure air, so that the discharge pressure at the outlet can be evenly averaged and the ambient air can be efficiently attracted. The effect is that a refreshing sensation can be obtained by airflow.

  Moreover, you may make it the structure which can attach a lighting fixture to the lower part of the said high pressure air generation | occurrence | production means.

  As a result, by installing a light source at a position where the influence on the attraction effect is small and installing it on the ceiling wall surface, it can be integrated as a lighted cooler, so that it can be used as a lighting fixture while providing a refreshing feeling due to airflow There is an effect.

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

(Embodiment 1)
1 and 2 show a cool air fan of the present embodiment. Arrows indicate the air flow direction, and dotted lines indicate the rotation axis direction and the centrifugal direction, respectively.

  The cool air blower of the present embodiment has a high-pressure air generating means 3 including a centrifugal impeller 1 for generating high-pressure air and a motor 2 for driving the centrifugal impeller 1 in the central portion of the main body 4. The centrifugal impeller 1 sucks air in the direction of the rotation axis from the suction port 5 and blows out air in the centrifugal direction. In the present embodiment, air is sucked from above the cool air blower, but air may be sucked from below and blown out in the centrifugal direction.

  The air blown in the centrifugal direction is configured to blow high-pressure air from the air outlet 8 of the elongated ring-shaped air flow blowing portion 7 whose longitudinal direction is the centrifugal direction after passing through the duct portion 6. The definition of the elongated ring shape indicates that the relationship between the width w in the centrifugal direction of the airflow blowing portion and the length l in the longitudinal direction of the airflow blowing portion is w <l. In this embodiment, as an example, w is 20 cm and l is 50 cm. Moreover, the airflow blowing part 7 is arrange | positioned so that it may mutually become symmetrical centering | focusing on a rotating shaft.

  In the present embodiment, two opposing airflow blowing portions 7 are installed with the rotation axis as the center, but one airflow blowing portion 7 may be provided, and two or more as long as the rotation axis is symmetric with respect to the rotation axis. It may be installed.

  The high-pressure air blown out from the air outlet 8 entrains surrounding air and gives coolness to the occupants below the cool air fan while increasing the air volume.

  The main body 4 is fixed to the ceiling by the ceiling mounting means 9. As a method of fixing to the ceiling, a method of fixing the annular portion at the top of the ceiling mounting means 9 and the ceiling with screws or the like is used.

  According to such a configuration, a high-pressure generated from the centrifugal impeller 1 by blowing an air flow in the centrifugal direction and arranging a long and narrow nozzle with the centrifugal direction as the longitudinal direction in the blowing direction of the static pressure centrifugal impeller 1. Since air can be sent efficiently in the longitudinal direction of the air flow outlet 7 without restoring the pressure of the air by a diffuser or the like, even if it is an elongated shape that requires high static pressure, The inside of the blowing part 7 can be filled with high-pressure air.

  On the other hand, when adopting a mixed flow impeller or an axial flow impeller that is more air-flowing than the centrifugal impeller 1, in order to send air to an elongated airflow blowing portion that requires high static pressure, the impeller downstream It is necessary to improve the static pressure by installing a diffuser, etc., and a guide vane that changes the airflow direction of the airflow in the vicinity of the air outlet is also required. It must be repeated.

  When the air rapidly shrinks, the flow increases and the pressure gradient becomes negative along the wind path. Since the flow is pushed in the flow direction by the force due to the pressure difference and flows along the wall surface, it suffers a loss due to friction loss with the wall surface. Further, when the air rapidly expands, the flow is decelerated and the pressure increases along the air path. In this case, the flow in the vicinity of the wall surface is lost because the kinetic energy of the flow is lost due to the wall surface friction. Furthermore, when the pressure rise along the air path cannot be overcome, the flow near the wall flows backward, causing separation of the wall boundary layer, and the flow is swirled, resulting in increased flow loss.

  Further, by increasing the number of elongated ring-shaped nozzles positioned in the centrifugal direction, the air volume can be easily increased without changing the device configuration.

  From the above, it is possible to obtain a refreshing sensation by airflow in a wide range with energy saving.

  Moreover, as shown in FIG. 3, it is set as the structure which can attach the lighting fixture 10 to the lower part of the high pressure air generation means 3. As shown in FIG. By adopting such a configuration, a light source can be provided at a position where the influence on the attraction effect is small and integrated as an illuminated cool air blower, so that a refreshing feeling due to the airflow can be obtained and also used as the lighting fixture 10. it can.

  As shown in FIG. 4, the duct portion 6 has a tongue portion 11.

  According to such a configuration, in the connecting portion between the duct portion 6 and the high-pressure air generating means 3, the blowing direction of the air pressurized by the centrifugal impeller 1 by the tongue portion 11 is limited. Backflow to the air generating means 3 can be prevented, and high-pressure air generated from the centrifugal impeller 1 can be efficiently sent to the air flow blowing unit 7. Further, by suppressing the generation of vortices at the connection between the duct portion 6 and the high-pressure air generating means 3, noise caused by pressure fluctuation can be reduced, so that a comfortable space can be formed with energy saving and low noise. Can do.

  As shown in FIG. 5, the air flow blowing unit 7 includes a chamber 12 that holds high-pressure air.

  According to such a configuration, the chamber 12 becomes a buffer space for adjusting the pressure of the high-pressure air, so that the discharge pressure of the outlet 8 can be evenly averaged and the ambient air is efficiently attracted. Can do.

  Further, the relationship between the diameter d of the centrifugal impeller and the width w in the centrifugal direction of the airflow blowing portion is d ≧ w. In this embodiment, as an example, d is 30 cm and w is 20 cm.

  According to such a configuration, since the cross-sectional area of the air path from the centrifugal impeller to the air outlet of the air flow outlet gradually decreases, the rapid expansion and contraction of the flow are reduced.

  Since the cool air blower according to the present invention is configured to efficiently send the air flow in the longitudinal direction of the air flow blowing portion, it is possible to obtain a refreshing feeling due to the air flow in a wide range of energy savings, and thus agitation of indoor air for houses It is expected to be used as various blower devices used for the purpose of refreshing feeling due to airflow.

DESCRIPTION OF SYMBOLS 1 Centrifugal impeller 2 Motor 3 High pressure air generating means 4 Main body 5 Suction port 6 Duct portion 7 Airflow blowing portion 8 Air outlet w Width in the centrifugal direction of the airflow blowing portion l Length in the longitudinal direction of the airflow blowing portion 9 Ceiling mounting means 10 Lighting fixture 11 Tongue 12 Chamber d Centrifugal impeller diameter 101 Base 102 Nozzle 103 Cylindrical grill 104 Impeller 105 Motor 106 Rotating shaft 107 Diffuser 108 Opening 109 Mouth 110 Coanda surface 111 Diffuser surface 112 Guide surface 113 Inner casing section 114 Outside Casing section 115 guide vanes

Claims (6)

A suction port for taking air into the box,
High-pressure air generating means comprising an impeller for generating high-pressure air and a motor for driving the impeller;
A duct portion connected to the high-pressure air generating means and serving as an air passage for high-pressure air sent from the high-pressure air generating means;
It is connected to this duct part, and has an annular airflow blowing part having an outlet for blowing out high-pressure air as an airflow,
A cool air cooler configured to attach the high-pressure air generating means to a ceiling,
The impeller is
It is a centrifugal impeller that sucks air in the direction of the rotation axis by rotation and blows air in the centrifugal direction,
The cool air blower characterized in that the air flow blowing portion has an elongated ring shape whose longitudinal direction is a centrifugal direction. 2. The cool air cooler according to claim 1, wherein a relationship between a diameter d of the impeller and a width w in a centrifugal direction of the airflow blowing portion is d ≧ w. 3. The cool air cooler according to claim 1, wherein the cool air cooler is provided with two or more airflow blowing portions and is arranged symmetrically with respect to a rotation axis of the motor. The cool air blower according to any one of claims 1 to 3, wherein the duct portion has a tongue portion. The cool air blower according to any one of claims 1 to 4, wherein the air flow blowing unit has a chamber for holding high-pressure air. The cool air blower according to any one of claims 1 to 5, wherein a lighting fixture can be attached to a lower portion of the high-pressure air generating means.

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