JP2015059508A - Blower device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress influence which a flow direction of high pressure air generated from a high pressure air generating part exerts on a blowout flow direction, while suppressing increase in pressure loss, in a blower device such as an electric fan.SOLUTION: A blower device where a high pressure air generation part and a fluid element nozzle part are connected by a high pressure air passage 15 formed by a duct 14 having at least one flat surface 16 on an inner peripheral surface, includes an air flow adjusting plate 21 which protrudes toward the inside of the high pressure air passage 15 from the flat surface 16 of the high pressure air passage 15 so as not to shield an inflow port 17 of the fluid element nozzle part, and it is configured in such a manner that a local air flow in the reverse direction from the flow direction of the high pressure air passage 15 is generated by the air flow adjusting plate 21. Thus, while suppressing increase in pressure loss, influence which the flow direction of the high pressure air generated from the high pressure air generation part exerts on the blowout flow direction can be suppressed.

Description

  The present invention relates to a blower device such as a so-called electric fan that has a feeling of comfort caused by blowing air in a room.

  What is attracting attention as a blower without a fan has a configuration as shown in FIG. 6, for example. That is, as shown in FIG. 6, the duct 101 is configured to extend upward from the high-pressure air generation unit 102 and blow out the air flowing in the duct 101 from the nozzle unit 103 in the horizontal direction (for example, see Patent Document 1). ). That is, a fan (not shown) is built in the high-pressure air generation unit 102 so that the fan cannot be seen.

JP 2010-203452 A

  The problem in the conventional example is that the air flowing in the duct 101 is blown out from the nozzle portion 103 in the horizontal direction. However, since the duct 101 is provided on the high-pressure air generating portion 102, the duct 101 The airflow flowing in the interior has a strong flow component in the vertical direction, and the airflow blown out from the nozzle portion 103 is directed obliquely upward and difficult to blow out in the horizontal direction.

  That is, depending on the distance from the blower, the amount of air blown to the user's foot side may be reduced, so that it was required to secure the amount of air blown to the foot side to further enhance the feeling of use.

  And, in order to make the airflow blown from the nozzle part in the horizontal direction according to the request, we examined the method of changing the flow of air by providing a guide plate at the inlet and applying the airflow to the guide plate, It was found that this method increases pressure loss and reduces energy savings.

  Therefore, an object of the present invention is to reduce the influence of the flow direction of high-pressure air generated from a high-pressure air generation unit on the direction of blow-off flow while suppressing an increase in pressure loss.

  In order to achieve this object, the present invention provides an impeller that generates high-pressure air, a high-pressure air generator that includes a motor that drives the impeller, and high-pressure air that extends from the high-pressure air generator. An air blower comprising a fluid element nozzle portion connected by an air path and configured to oscillate the high-pressure air in a direction perpendicular to the flow direction of the high-pressure air air path so as to blow out an air flow. The air passage is formed by a linear duct having at least one flat surface on the inner peripheral surface, and the fluid element nozzle portion is opened to the flat surface of the duct and into which the high-pressure air flows, and an external An air outlet that expands toward the air, an element main passage that communicates from the inlet to the outlet, and a circulation air passage that opens to a corresponding wall surface of the element main passage, and does not block the inlet As before An airflow adjustment plate projecting from a flat surface toward the high-pressure air air passage is provided, and the airflow adjustment plate generates a local airflow in a direction opposite to the flow direction of the high-pressure air air passage. Yes, and this achieves the intended purpose.

  According to the present invention, an impeller that generates high-pressure air, a high-pressure air generation unit that includes a motor that drives the impeller, and a high-pressure air air passage that extends from the high-pressure air generation unit are connected to each other. An air blower including a fluid element nozzle unit that oscillates air in a direction perpendicular to a flow direction of the high-pressure air flow path to blow out an air flow, and the high-pressure air air flow path is formed on an inner peripheral surface. The fluid element nozzle portion is formed by a straight duct having at least one flat surface, and the fluid element nozzle portion has an inlet opening into the flat surface of the duct to allow the high-pressure air to flow in, and a blower that expands the airflow toward the outside. An outlet, an element main channel communicating with the outlet from the inflow port, and a circulation air path that opens to a corresponding wall surface of the element main channel, so as not to block the inflow port, the flat surface from the flat surface High pressure air duct A part of the high-pressure air flowing in the duct is configured to generate a local airflow in a direction opposite to the flow direction of the high-pressure air flow path by the air-flow adjustment plate. Collides with the airflow adjusting plate, and the airflow whose direction is changed to the flat surface side becomes a flow in the direction opposite to the flow direction of the high-pressure air flow path along the flat surface. Due to the friction due to the viscosity of the air in the reverse flow, a component opposite to the flow direction of the high-pressure air flow path is added to the air flow toward the inlet, so that the air flow blown out from the outlet is It blows out without being biased in the flow direction.

  As a result, while suppressing an increase in pressure loss, the user can hit the airflow in the range where the duct is extended regardless of the distance from the blower to the user, and can provide a more comfortable cool feeling. become. Moreover, since the airflow adjusting plate is provided on the flat surface in the duct, it is not visible from the outlet and the appearance of the blower is not impaired.

The perspective view of the air blower of Embodiment 1 and 2 of this invention Front view of the air blower according to Embodiments 1 and 2 of the present invention The figure which shows the structure in the cross section X of the same air blower The figure which shows the structure in the cross section Y of the same air blower. The figure which shows the structure of the enlarged view of the A section of FIG. The block diagram which shows the cross section of an example of a prior art

  The blower according to claim 1 of the present invention includes an impeller that generates high-pressure air, a high-pressure air generator that includes a motor that drives the impeller, and a high-pressure air air passage that extends from the high-pressure air generator. And a high-pressure air flow path comprising a fluid element nozzle unit that blows the high-pressure air in a direction perpendicular to the flow direction of the high-pressure air flow path to blow out an air flow. Is formed by a linear duct having at least one flat surface on the inner peripheral surface, and the fluid element nozzle portion opens to the flat surface of the duct and has an inlet for allowing the high-pressure air to flow in and outward. The air outlet expands the airflow, the element main flow path communicating with the air outlet from the inlet, and the circulation air passage that opens to the corresponding wall surface of the element main flow path so as not to block the inlet. The flat surface Wherein with the airflow adjustment plate protruding toward the high-pressure air wind passage, wherein the direction of flow of the high pressure air air path by the air flow adjusting plate is intended to generate a local airflow in the opposite direction.

  As a result, part of the high-pressure air flowing in the duct collides with the airflow adjustment plate, and the airflow that has turned to the flat surface side flows in a direction opposite to the flow direction of the high-pressure air flow path along the flat surface. Become. Due to the friction caused by the air flow viscosity in the opposite direction, a component in the direction opposite to the flow direction of the high-pressure air flow path is added to the air flow toward the inflow port. It blows out without being biased in the flow direction of the air passage.

  As a result, while suppressing an increase in pressure loss, regardless of the distance from the blower to the user, the user can hit the airflow in the range in which the duct is extended, providing a more comfortable cool feeling. It becomes possible. Moreover, since the airflow adjusting plate is provided on the flat surface in the duct, it is not visible from the outlet and the appearance of the blower is not impaired.

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

(Embodiment 1)
1 and 2 are a perspective view and a front view of the air blower according to Embodiment 1 of the present invention.

  As shown in FIGS. 1 and 2, the air blower includes a lower high pressure air generation unit 11 and seven fluid element nozzle units 12 provided on the high pressure air generation unit 11.

  The high-pressure air generating unit 11 includes a suction port 13 for taking in air, an impeller 24 for generating high-pressure air, and a motor 25 for driving the impeller 24.

  As shown in FIG. 3, the high-pressure air air passage 15 connecting the high-pressure air generator 11 and the fluid element nozzle portion 12 is formed by a linear duct 14 having at least one flat surface 16 on the inner peripheral surface.

  The duct 14 has a cylindrical shape that extends upward from the high-pressure air generator 11, and has a closed portion at the upper end in the longitudinal direction. The space in the duct 14 serves as the high-pressure air air passage 15.

  The fluid element nozzle unit 12 communicates with the inlet 17 that opens into the flat surface 16 of the duct 14 and allows high-pressure air to flow in, the outlet 18 that expands the airflow toward the outside, and the outlet 18 from the inlet 17. An element main flow path 19 and a circulation air path 20 that opens to the corresponding wall surface of the element main flow path 19 are provided.

  As shown in FIG. 2, a plurality of air outlets 18 are formed in the direction of the high-pressure air duct 15 of the duct 14. Each of the inflow port 17 and the element main channel 19 has a substantially rectangular cross section perpendicular to the flow direction of the element main channel 19.

  The circulation air passage 20 is configured to branch from one side on the long side of the element main flow path 19 and communicate with the surface on the long side of the element main flow path 19 on the opposite side.

  Further, an air flow adjusting plate 21 that projects from the flat surface 16 into the high-pressure air air passage 15 so as not to block the inflow port 17 and generates a local air flow opposite to the flow direction of the high-pressure air air passage 15. However, as shown in FIG. 4, in the flat surface 16 portion, the high-pressure air air passage 15 is provided so as to correspond to the plurality of inlets 17. As shown in FIG. 3, the airflow adjusting plate 21 is integrally formed from the flat surface 16 toward the inner peripheral surface other than the flat surface 16 of the duct 14, and the shape of the portion standing from the inner peripheral surface side of the duct 14 is formed. As shown in FIG. 5, the tip is inclined toward the upstream side of the duct 14 as the distance from the portion erected from the flat surface 16 increases.

  The air blowing operation in the above configuration will be described.

  First, when the impeller 24 is driven by the motor 25, outside air is sucked into the high-pressure air air passage 15 in the duct 14 from the suction port 13, and the element main flow passage 19 from the inlet 17 through the high-pressure air air passage 15. Be blown out via.

  Under the present circumstances, it becomes a flow adhering to either of the long side surfaces which have the enlarged angle of the blower outlet 18 by the Coanda effect. Next, once a flow adhering to one surface of the air outlet 18 occurs, the circulation air passage 20 connected to one surface of the element main flow channel 19 to which air has adhered because the air flow velocity at the boundary of the surface is high. On the other hand, the pressure in the circulating air passage 20 increases because the flow rate of the air is slow on the other surface. Since the circulation air passages 20 connected to both surfaces of the element main flow passage 19 communicate with each other, the pressure is transmitted by the circulation air passage 20, and the pressure in the circulation air passage 20 connected to one surface to which the air adheres is changed. As the pressure on the other side rises and the pressure on the other side decreases, the flow of air that has adhered to one surface is switched to adhere to the other surface. By alternately performing this motion, the air current oscillates. That is, the airflow blown out from the outlet 18 is vibrated in the short side direction of the element main flow path.

  Thereby, the airflow from the blower outlet 18 is blown out in a wide range, and the blown-out air hits the user while surrounding air is involved, thereby providing a cool feeling to the user.

  The feature of the present embodiment is that the air flow adjusting plate is arranged so that the vertically upward air flow generated from the high-pressure air generator 11 is blown out in the substantially horizontal direction at the outlet 18 while suppressing an increase in pressure loss. By providing, the user can feel the airflow regardless of the distance from the blower to the user, and provide a more comfortable cool feeling.

  Below, the effect | action of the airflow adjustment board 21 which blows off the high pressure air which generate | occur | produced from the high pressure air generation | occurrence | production part 11 in the horizontal direction in the blower outlet 18 is demonstrated.

  The air sucked into the high-pressure air generating unit 11 flows vertically upward into the duct 14 through the high-pressure air air passage 15, but a part of the high-pressure air is provided by providing the air flow adjusting plate 21 in the high-pressure air air passage 15. As shown in FIG. 5, a circulating flow 23 is generated between the two air flow adjusting plates 21 and the flat surface 16. In the circulating flow 23, a vertical downward flow that is opposite to the flow direction of the high-pressure air air passage 15 is generated, and the airflow flowing into the inlet 17 is vertically downward due to the viscous friction of the air in the reverse flow. Since the air flows into the inflow port 17 while being pulled in the direction, it is easy to flow the airflow in the direction of water in the flow channel between the element main flow channel 19 and the air outlet 18. That is, the flow direction of the high-pressure air air passage 15 can prevent the flow in the passage between the element main passage 19 and the outlet 18 from being affected.

  And an air current blows off horizontally from the blower outlet 18.

  In particular, in the present embodiment, the airflow adjustment plate 21 is configured such that the tip is inclined toward the upstream side of the duct 14 as shown in FIG. As a result, high-pressure air can be efficiently guided to the airflow adjusting plate 21, and the effect of the present embodiment can be enhanced. The air flow adjusting plate 21 may be a simple flat plate as long as it projects from the flat surface 16 into the high-pressure air air passage 15 so as not to block the inflow port 17.

  Further, as shown in FIG. 3, the airflow adjusting plate 21 has a structure that does not block the inflow port 17 while being connected to the flat surface 16. Specifically, the air flow adjusting plate 21 is not provided between the opening surface of the inlet 17 and the facing surface of the inner peripheral surface of the duct 14. As a result, it is not necessary to install an airflow guide plate that blocks the inflow port 17, which causes a large increase in pressure loss in the high-pressure air air passage 15, so that an increase in pressure loss can be suppressed. Become.

  In addition, since the guide plate is not provided in the air outlet 18 and the element main flow channel 19 that can be seen from the outside of the air blower in order to realize this effect, there is an effect that the aesthetic appearance of the air blower is not impaired. Yes.

  In the present embodiment, the flat surface 16 and the element main channel 19 are connected by a curved surface. As a result, the pressure loss can be reduced.

  In the present embodiment, the number of airflow adjustment plates 21 and the gaps between the airflow adjustment plates 21 vary at each inflow port 17, but may be arbitrarily set. As the number of the airflow adjusting plates 21 is increased and the gap between the airflow adjusting plates 21 is reduced, the phenomenon in which air does not flow between the airflow adjusting plates 21 or the lower portion of the air outlet 18 is suppressed. As a result, the fluid element functions as a starting point for realizing the fluid element function, and is likely to adhere to either of the long side surfaces having the enlarged angle of the outlet 18. Can be stably provided. However, on the other hand, the pressure loss becomes large.

  In addition, the air blower of this Embodiment does not need to have the structure of a fluid element.

(Embodiment 2)
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, as shown in FIG. 4, the number of airflow adjustment plates 21 is different in the vicinity of each fluid element nozzle portion 12. However, in the vicinity of all the fluid element nozzle parts 12 except for the vicinity of the fluid element nozzle part 12 farthest from the high-pressure air generating part 11, there is always one air flow adjustment at the boundary part 22 between the fluid element nozzle parts 12. A plate 21 is provided.

  The feature of this embodiment is that the airflow flows vertically upward in the high-pressure air air passage 15 while uniformly applying the airflow to the entire body of the user in order to provide a more comfortable cool feeling to the user. This is to suppress the pressure loss of the air flow adjusting plate 21 in the high-pressure air flow path 15 that occurs.

  As shown in FIG. 3, the airflow adjustment plate 21 partially closes the high-pressure air air passage 15. Therefore, in the airflow flowing vertically upward in the high-pressure air air passage 15, the airflow adjustment plate 21 causes pressure loss.

  Therefore, as in the present embodiment, in the air blower having a plurality of fluid element nozzle portions 12 as in the present embodiment, the size of the air flow adjusting plate 21 attached to the boundary portion 22 is set to the size of the fluid element nozzle portion 12. By adjusting as appropriate according to the position, the cross-sectional area of the high-pressure air air passage 15 in the vicinity of each fluid element nozzle portion 12 is set, thereby suppressing the pressure loss of the air flow adjusting plate 21.

  In the present embodiment, the airflow adjustment plate 21 mounted other than the boundary portion 22 is designed to be smaller than the airflow adjustment plate 21 mounted on the boundary portion 22. This is for suppressing the pressure loss, and in this embodiment, the pressure loss of the air flow adjusting plate 21 attached to the boundary portion 22 is dominant. Below, it describes about the airflow adjustment board 21 with which the boundary part 22 was mounted | worn.

Here, the specific set value and operation in the case where the air blowing device of the present embodiment has an air blowing amount of 7 m ³ / h will be described below.

In order to provide a more comfortable cooling sensation to the user, it is important to blow the air uniformly over the entire body of the user, and for that purpose, the blowout of 1 m ³ / h is evenly distributed at each of the seven outlets 18. It is desirable to set the amount.

Therefore, first, the vicinity of the fluid element nozzle portion 12 closest to the high-pressure air generating portion 11 is clearly described. In this portion, it is desired that 1 m ³ / h out of 7 m ³ / h is blown out from the outlet 18 and the remaining 6 m ³ / h is flowed vertically upward via the high-pressure air air passage 15. At this time, in order to suppress an increase in pressure loss caused by providing the airflow adjusting plate 21 and proportional to the square of the flow velocity, the high-pressure air air passage 15 partially blocked by the airflow adjusting plate 21 is set vertically upward. The flow velocity of the flowing air flow is set to be lower than the flow velocity from the outlet 18 at the minimum. Since the flow velocity is proportional to the flow rate and inversely proportional to the cross-sectional area of the air passage, the air flow adjusting plate 21 increases the pressure so that the cross-sectional area of the high-pressure air air passage 15 is at least 6 times the cross-sectional area of the outlet 18. The cross sectional area of the air air passage 15 is set.

Next, for example, the vicinity of the fluid element nozzle portion 12 that is the second most distant from the high-pressure air generating portion 11 will be described. Since a total of 5 m ³ / h of air is already blown out from the outlet 18 in the five fluid element nozzle portions 12 upstream of the nozzle 14, the remaining 2 m ³ / h is left in the high-pressure air air passage 15 in this portion. The air current flows. Of this 2 m ³ / h, 1 m ³ / h is blown out from the blowout port, and the remaining 1 m ³ / h is caused to flow vertically upward via the high-pressure air duct 15. Similarly to the above, in order to suppress an increase in pressure loss caused by the provision of the airflow adjustment plate 21, the flow velocity of the airflow flowing vertically upward through the high-pressure air passage 15 partially blocked by the airflow adjustment plate 21 is blown at the lowest. In order to make it lower than the flow velocity from the outlet 18, the cross-sectional area of the high-pressure air air passage 15 is set to be at least twice as large as the cross-sectional area of the outlet 18.

  Also in the vicinity of the other fluid element nozzle portion 12, the cross-sectional area of the high-pressure air air passage 15 is set based on the same principle.

  As a result, the flow velocity of the vertically upward air flow in the high-pressure air air passage 15 partially blocked by the air flow adjusting plate 21 can be made lower than the flow velocity of the air flow blown out from the air outlet 18. As a result, an increase in pressure loss caused by providing the airflow adjusting plate 21 can be suppressed.

  In the present embodiment, as shown in FIG. 3, the opening area of the high-pressure air air passage 15 that is second closest to the high-pressure air generator 11 is set to be six times the sectional area of the outlet 18.

  According to the present invention, while suppressing an increase in pressure loss, a portion of the high-pressure air flowing in the duct flows in a direction opposite to the flow direction of the high-pressure air flow path, and friction due to the viscosity of the air in the reverse flow Thus, the air flow to be blown out is not biased in the flow direction of the high-pressure air flow path. Therefore, it is expected to be used as a blower for home use, office use, public space, and the like.

DESCRIPTION OF SYMBOLS 11 High pressure air generation part 12 Fluid element nozzle part 13 Suction inlet 14 Duct 15 High pressure air air path 16 Flat surface 17 Inlet 18 Outlet 19 Element main flow path 20 Circulation air path 21 Airflow adjustment plate 22 Boundary part 23 Circulating flow

Claims (1)

A high-pressure air generating section provided with an impeller for generating high-pressure air and a motor for driving the impeller, and a high-pressure air wind path extending from the high-pressure air generating section; The air blower includes a fluid element nozzle portion that is swung in a direction perpendicular to the flow direction of the air and blows out an air flow, wherein the high-pressure air air passage has at least one flat surface on an inner peripheral surface. The fluid element nozzle portion is formed by a straight duct, and the fluid element nozzle portion opens from a flat surface of the duct to allow the high-pressure air to flow in, a blow-out port from which the airflow expands toward the outside, and the inlet An element main channel that communicates with the air outlet and a circulation air channel that opens to the corresponding wall surface of the element main channel are provided, and the flat surface faces the high pressure air channel so as not to block the inlet. Overhang With the airflow adjustment plate, the blower and wherein the generating the local airflow in the opposite direction by the air flow adjusting plate to the flow direction of the high pressure air wind passage.

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