Blower

Abstract

To provide a blower that can diffuse positive ions and negative ions in a room efficiently.SOLUTION: A blower includes: a body; a fan disposed to the body and including blades pivotally supported to a rotation shaft; and an ion generator including a positive electrode and a negative electrode. The positive electrode and the negative electrode are disposed in different positions in an axial direction along an extension direction of the rotation shaft.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a blower. [Background technology]

[0002] Patent Document 1 discloses a blower that integrates a ceiling light that is installed on the ceiling surface of a room to provide illumination, a blower fan, and an ion generator that generates ions. This blower has a blower fan located in the center of the main body that is attached to the ceiling surface, and an ion generator located on the underside of the main body.

[0003] The ion generating device includes a discharge electrode having a positive electrode and a negative electrode, and induction electrodes corresponding to the discharge electrodes, and generates positive ions and negative ions by discharging.

[0004] In the blower, the positive ions and negative ions generated by the ion generating device are carried by an air current generated by a blower fan and diffused throughout the indoor space. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-179007 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned blower, positive and negative ions may be swept in the same direction by the airflow generated by the blower fan, which may result in neutralization of the positive and negative ions, and may also lead to an imbalance between the amount of positive ions and the amount of negative ions in the indoor space.

[0007] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a blower that can efficiently diffuse positive ions and negative ions into a room. [Means for solving the problem]

[0008] A blower according to one embodiment of the present disclosure comprises a main body, a fan disposed on the main body and having blades journaled on a rotating shaft, and an ion generating unit having a positive electrode and a negative electrode, the positive electrode and the negative electrode being disposed at different positions in an axial direction along the extension direction of the rotating shaft. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to provide a blower that can efficiently diffuse positive ions and negative ions into a room. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a front cross-sectional view showing a blower according to an embodiment. [Figure 2] FIG. 2 is a bottom view showing the blower according to the embodiment. [Figure 3] FIG. 1 is an exploded perspective view showing a blower according to an embodiment. [Figure 4A] FIG. 2 is a perspective view showing an ion generating unit. [Figure 4B] FIG. 4B is a plan view of the ion generation unit shown in FIG. 4A. [Figure 5] FIG. 2 is a diagram schematically illustrating an airflow generated by a fan of a blower. [Figure 6] 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a front cross-sectional view of the blower. FIG. [Figure 7] FIG. 2 is a diagram schematically illustrating an example of the arrangement of an ion generating unit in a plan view of a blower. [Figure 8] FIG. 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a plan view of the blower. [Figure 9] FIG. 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a plan view of the blower. [Figure 10] FIG. 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a plan view of the blower. [Figure 11]FIG. 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a plan view of the blower. [Figure 12] FIG. 10 is a diagram schematically illustrating another example of the arrangement of the ion generating section in a plan view of the blower. [Figure 13] FIG. 4 is a front cross-sectional view showing the wind speed distribution generated when the fan of the blower is operated. [Figure 14A] FIG. 10 is a side view schematically showing another example of the ion generating unit. [Figure 14B] FIG. 10 is a side view schematically showing still another example of the ion generating section. [Figure 15] FIG. 10 is a plan view schematically showing still another example of the ion generating section. DETAILED DESCRIPTION OF THE INVENTION

[0011] Embodiments of the present disclosure will be described with reference to the drawings. In the following, identical or corresponding elements will be designated by the same reference numerals throughout the drawings, and redundant descriptions will be omitted as appropriate. The embodiments described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments. Various modifications may be made to the embodiments described below according to the design and the like, provided they do not deviate from the technical concept of the present disclosure.

[0012] Fig. 1 is a front cross-sectional view showing a blower according to an embodiment, Fig. 2 is a bottom view showing a blower according to an embodiment, and Fig. 3 is an exploded perspective view showing a blower according to an embodiment.

[0013] The blower 1 includes a main body 2, a fan 3 disposed in the main body 2, and an ion generating unit 5. In this embodiment, the ion generating unit 5 is disposed in a predetermined position in the blower 1. The arrangement of the ion generating unit 5 in the blower 1 will be described in detail below.

[0014] The main body 2 is formed, for example, in a substantially cylindrical shape, and has an attachment member (not shown) on the back side of the main body 2 for attaching it to a ceiling L. The attachment member may be, for example, a ceiling hook. The main body 2 includes an illumination body 20 of the illumination unit 4, which will be described later. The main body 2 also houses power supply boards and control boards for the fan 3, illumination unit 4, and ion generation unit 5, and the fan 3 is placed in the center of the underside of the main body 2.

[0015] The fan 3 has an impeller 10 that generates an airflow, and a motor unit 13 that axially supports and rotates the impeller 10. The fan 3 is configured as, for example, an axial flow fan.

[0016] In the impeller 10, a plurality of blades 11 are arranged on the outer peripheral surface of a cylindrical boss portion 12. In the impeller 10, a rotating shaft 14 of a motor portion 13 is supported by the boss portion 12, and the tip of the rotating shaft 14 protruding from the center of the boss portion is fixed by a fixing screw 15. In this embodiment, the direction along the extension direction of the rotating shaft 14 is referred to as the axial direction. That is, in FIG. 1, the vertical direction in the drawing is the axial direction. Therefore, when the fan is attached to a ceiling L as in this embodiment, the axial direction corresponds to the height direction of the fan.

[0017] As shown in Figure 2, impeller 10 is driven by motor unit 13 to rotate in a clockwise direction as viewed from below, as indicated by arrow G, around rotation axis 14 that is perpendicular to the mounting surface (ceiling surface L) of main body 2, thereby sending out an airflow downward.

[0018] 3, a plurality of stays 6 are arranged at a predetermined angle on the peripheral edge 2c of the main body 2, and the lighting unit 4 is attached to the tip 6a of each stay 6. A circulation port S1 is formed between adjacent stays 6 to allow air to flow toward the upper end 10a of the fan 3.

[0019] The lighting unit 4 includes an annular lighting body 20 having, for example, a substantially cylindrical hollow portion 21 formed in the center for housing the fan 3. The lighting body 20 is configured to surround the outer periphery of the fan 3 in the hollow portion 21. The lighting body 20 is configured to house an LED (Light Emitting Diode) or the like as a light source, and to cover the light source with a lighting cover 22.

[0020] The lighting cover 22 is formed of, for example, a light-transmitting resin. The upper surface 20a of the lighting body 20 is formed, for example, flat, and the tip 6a of each stay 6 is fixed to the upper surface 20a. The lighting body 20 is formed, for example, to have a polygonal cross section.

[0021] The impeller 10 is housed in the hollow portion 21 of the lighting body 20, and is supported on the rotating shaft 14 of the motor unit 13 for driving it to rotate, and is configured to be freely rotatable by fixing the tip of the rotating shaft 14 with a fixing screw 15.

[0022] The lighting unit 4 may be configured such that the lighting body 20 is divided into four parts in the circumferential direction, and the divided lighting bodies are connected together in an annular shape.

[0023] A fan guard 7 having a plurality of blades for covering the opening 23 is provided at the bottom end of the lighting body 20. The fan guard 7 can prevent foreign objects from coming into contact with the impeller 10. Note that the fan guard 7 may not be provided depending on the configuration of the blower 1.

[0024] Fig. 4A is a perspective view showing the ion generation unit 5. Fig. 4B is a plan view of the ion generation unit 5 shown in Fig. 4A. The ion generation unit 5 has a positive electrode 31 and a negative electrode 32. As shown in Figs. 4A and 4B, the ion generation unit 5 has, for example, a housing 30 having a generally elongated box shape, positive and negative discharge electrodes 31 and 32 that protrude from openings 30a and 30b at the top of the housing 30 and generate discharge, and induction electrodes 33 and 34 that face the discharge electrodes and are provided on the peripheries of the openings 30a and 30b.

[0025] A gate-shaped frame 35 is provided in the longitudinal direction of the upper part of the housing 30 to prevent contact with the positive electrode 31 and the negative electrode 32. A plurality of gate-shaped frames 35 may be provided in the shorter side direction of the upper part of the housing. The discharge electrodes (i.e., the positive electrode 31 and the negative electrode 32) and the induction electrodes 33 and 34 of the ion generation unit 5 are connected to a control board of the main body 2, and discharge is controlled.

[0026] The positive electrode 31 and the negative electrode 32 are formed, for example, in a roughly brush shape by bundling multiple thread-like conductors, and their lower portions are fixed inside the housing 30. The ion generating unit 5 equipped with brush-like electrodes has an increased area for generating positive and negative ions, and therefore can generate a greater amount of ions when the same voltage is applied, compared to needle-like electrodes. The positive electrode 31 and the negative electrode 32 may also be configured, for example, in a roughly needle shape. The ion generating unit 5 may also be configured to be covered with a case with an opening to prevent hands or fingers from directly touching the exposed electrodes.

[0027] In the ion generating unit 5, when a positive high-voltage pulse is applied to the positive electrode 31 of one of the discharge electrodes and a negative high-voltage pulse is applied to the negative electrode 32 of the other, a corona discharge occurs at the tips of the positive electrode 31 and the negative electrode 32 of the discharge electrodes, generating positive ions and negative ions.

[0028] Positive ions are hydrogen ions (H + ) is a cluster ion formed by clustering multiple water molecules around H + (H2O) m (m is any integer greater than or equal to 0). The negative ions are oxygen ions (O2 - ) is a cluster ion formed by clustering multiple water molecules around O2 - (H2O) n (n is any integer greater than or equal to 0).

[0029] When positive and negative ions are released into the air, they surround mold spores and viruses floating in the air and cause a chemical reaction with each other on their surfaces. The discharge product, hydroxyl radicals (·OH), act to remove airborne mold spores and other microorganisms.

[0030] Ion generating unit 5 generates discharge products such as electrons, ions, radicals, and ozone in the air through discharge.

[0031] The positive ions and negative ions generated by the discharge of the ion generating unit 5 described above have the property of canceling each other out. Therefore, when positive ions and negative ions are carried in the same air current, they cancel each other out and are neutralized. As a result, the positive ions and negative ions do not diffuse far into the room, and the effect achieved by the presence of both positive ions and negative ions is reduced. To address this issue, in the blower 1 according to this embodiment, the ion generating unit 5 is disposed in a predetermined position so that the positive ions and negative ions generated by the ion generating unit 5 can be carried in different air currents and diffused widely. The arrangement of the ion generating unit 5 will be described in detail below.

[0032] The ion generating unit 5 is arranged so that the positive electrode 31 and the negative electrode 32 are at different positions in the axial direction of the blower 1. In this embodiment, the axial positions of the positive electrode 31 and the negative electrode 32 are determined by the positions of the tips of the positive electrode 31 and the negative electrode 32, respectively. That is, in this embodiment, the positions of the tips of the positive electrode 31 and the negative electrode 32 are the axial positions of the positive electrode 31 and the negative electrode 32, respectively. Therefore, the axial positions of the positive electrode 31 and the negative electrode 32 are determined by the positions of the tips of, for example, brush-like electrodes.

[0033] In the example shown in FIG. 1 , the ion generation unit 5 is disposed in an inclined state on the underside 2b of the main body 2 of the blower 1. As a result, one of the positive electrode 31 and the negative electrode 32 is positioned higher than the other, and as a result, the positive electrode 31 and the negative electrode 32 are disposed at different positions in the axial direction of the blower 1. The ion generation unit 5 need only be disposed in an inclined state, and is not necessarily disposed as shown in FIG. 1 . For example, the underside of the main body 2 may be inclined with respect to the rotation axis 14, and the ion generation unit 5 may be disposed on this inclined surface. As an example, the main body 2 may have a truncated cone shape, and the ion generation unit 5 may be disposed on the inclined surface of the truncated cone-shaped main body 2. In this case, the ion generation unit 5 may also be disposed in an inclined state.

[0034] FIG. 5 is a schematic diagram illustrating the airflow generated by the fan 3 of the blower 1. When the lighting unit 4 of the blower 1 is turned on to illuminate the room, and when the motor unit 13 is driven to rotate the impeller 10 in the forward direction indicated by arrow G (see FIG. 2), air near the ceiling is supplied to the intake side (the upper end 10a side of the impeller 10) through the flow port S1 as indicated by arrow K1 (see FIG. 1). The air passes through the opening 23 of the lighting body 20 and the fan guard 7, as indicated by arrow K2 (see FIG. 1), and is then blown downward by the impeller 10. At this time, the air is blown downward from the blower 1 as indicated by arrow K2, and swirls around the rotation axis 14 due to the rotation of the impeller 10. As a result, the air is blown downward in a spiral airflow as indicated by arrow K3 in FIG. 5. This allows the blower 1 to circulate air in the room.

[0035] The ion generating unit 5 includes a positive electrode 31 and a negative electrode 32, which are discharge electrodes, and two induction electrodes 33 and 34. Positive and negative ions generated by the positive electrode 31 and the negative electrode 32 due to discharge are released into the space S between the lower surface 2b of the main body 2 and the upper end 10a of the impeller 10. The positive and negative ions released into the space S are carried by the spiral airflow generated by the fan. Because the positive electrode 31 and the negative electrode 32 are positioned at different axial positions of the blower 1 in this embodiment, the positive ions generated by the positive electrode 31 and the negative ions generated by the negative electrode 32 are carried by different spiral airflows. Therefore, immediately after the generation of positive and negative ions by the positive electrode 31 and the negative electrode 32, neutralization of the positive and negative ions is reduced. As a result, the positive and negative ions are carried by the different spiral airflows and efficiently diffused throughout the room. Furthermore, the amount of positive and negative ions in the room can be well balanced.

[0036] Note that either the positive electrode 31 or the negative electrode 32 may be positioned higher as long as they are positioned at different positions in the axial direction of the blower 1. That is, the positive electrode 31 may be positioned higher than the negative electrode 32, or the negative electrode 32 may be positioned higher than the positive electrode 31. The positive electrode 31 and the negative electrode 32 may be positioned such that the generated positive ions and negative ions are carried by different spiral airflows.

[0037] The arrangement of ion generation unit 5 in blower 1 is not limited to the arrangement described in Fig. 1. Ion generation unit 5 may be arranged in blower 1 so that positive electrode 31 and negative electrode 32 are at different positions in the axial direction of blower 1.

[0038] For example, in the example shown in FIG. 1 , the ion generation unit 5 is disposed on the lower surface 2b of the main body 2 of the blower 1. However, the ion generation unit 5 does not have to be disposed on the main body 2 of the blower 1. For example, the ion generation unit 5 may be held by a holding member connected to the main body 2 or another component. In either case, the ion generation unit 5 is disposed on the axial side of the fan 3 where the main body 2 is located. In other words, the ion generation unit 5 is disposed above the fan 3.

[0039] The ion generation unit 5 does not necessarily have to be located above the fan 3, and may be located below the fan 3. Specifically, the ion generation unit 5 may be located on the axial side of the fan 3 opposite the side on which the main body 2 is located, as shown in FIG. 6 , for example. In this case, the ion generation unit 5 is held by, for example, a holding member connected to the main body 2 of the blower 1 or another component. Even when the ion generation unit 5 is located below the fan 3, by arranging the positive electrode 31 and the negative electrode 32 at different positions in the axial direction of the blower 1, positive ions and negative ions are sent out on different spiral airflows, and the positive ions and negative ions can be efficiently diffused throughout the room.

[0040] Furthermore, the arrangement of the ion generating unit 5 on a plane is not limited to the arrangement shown in Fig. 1 and Fig. 6. Here, the plane refers to a plane that intersects with the rotation shaft 14 (orthogonal in this embodiment). Figs. 7, 8, and 9 are diagrams showing examples of the arrangement of the ion generating unit 5 in a plan view of the blower 1. Figs. 7, 8, and 9 are diagrams showing plan views of the blower 1 as seen from above, and for simplicity's sake, only the impeller 10, blades 11, boss portion 12, motor portion 13, rotation shaft 14, lighting body 20, and ion generating unit 5 are shown as components of the blower 1. Furthermore, the arrows in the diagrams indicate the rotation direction of the impeller 10.

[0041] 7, 8, and 9, ion generation unit 5 is arranged inside the rotation radius of blade 11. In FIGS. 7, 8, and 9, the orientation of ion generation unit 5 arranged in blower 1 differs in plan view.

[0042] 7, ion generation unit 5 is arranged such that first end 51 located on the downstream side with respect to the rotation direction of impeller 10 is closer to the rotation center of impeller 10 (i.e., rotation shaft 14) than second end 52 located on the upstream side. On the other hand, in the example of FIG. 8, ion generation unit 5 is arranged such that second end 52 located on the upstream side with respect to the rotation direction of impeller 10 is closer to the rotation center of impeller 10 than first end 51 located on the downstream side. In this way, the distance between first end 51 and rotation shaft 14 and the distance between second end 52 and rotation shaft 14 are different, and therefore the first distance from rotation shaft 14 to positive electrode 31 and the second distance from rotation shaft 14 to negative electrode 32 are different.

[0043] For example, in the ion generation unit 5, the positive electrode 31 is located on the first end 51 side, and the negative electrode 32 is located on the second end 52 side. In this case, in the example of FIG. 7, the first distance from the rotation shaft 14 to the positive electrode 31 is shorter than the second distance from the rotation shaft 14 to the negative electrode 32. In addition, in the example of FIG. 8, the second distance from the rotation shaft 14 to the negative electrode 32 is shorter than the first distance from the rotation shaft 14 to the positive electrode 31. In this manner, the positive electrode 31 and the negative electrode 32 may be arranged such that the first distance from the rotation shaft 14 to the positive electrode 31 and the second distance from the rotation shaft 14 to the negative electrode 32 are different. With this arrangement, the positive ions generated from the positive electrode 31 and the negative ions generated from the negative electrode 32 are sent out on different spiral airflows, and the positive ions and negative ions can be efficiently diffused throughout the room.

[0044] For example, suppose that the negative electrode 32 is located on the first end 51 side of the ion generation unit 5 and the positive electrode 31 is located on the second end 52 side. In this case, in the example of FIG. 7 , the first distance from the rotation shaft 14 to the positive electrode 31 is longer than the second distance from the rotation shaft 14 to the negative electrode 32. In addition, in the example of FIG. 8 , the second distance from the rotation shaft 14 to the negative electrode 32 is longer than the first distance from the rotation shaft 14 to the positive electrode 31. Therefore, in this case as well, the positive electrode 31 and the negative electrode 32 are arranged such that the first distance from the rotation shaft 14 to the positive electrode 31 and the second distance from the rotation shaft 14 to the negative electrode 32 are different. With this arrangement, the positive ions generated from the positive electrode 31 and the negative ions generated from the negative electrode 32 are sent out on different spiral airflows, thereby efficiently diffusing the positive ions and negative ions throughout the room.

[0045] In the example of FIG. 9 , ion generating unit 5 is arranged such that first end 51 located downstream and second end 52 located upstream in the rotation direction of impeller 10 are equidistant from the center of rotation (i.e., rotation shaft 14) of impeller 10. In this case, regardless of whether positive electrode 31 and negative electrode 32 are arranged on the first end 51 side or the second end 52 side, a first distance from rotation shaft 14 to positive electrode 31 and a second distance from rotation shaft 14 to negative electrode 32 are equal. In other words, positive electrode 31 and negative electrode 32 are arranged such that the first distance from rotation shaft 14 to positive electrode 31 and the second distance from rotation shaft 14 to negative electrode 32 are different. Even in this case, when positive ions generated from positive electrode 31 and negative ions generated from negative electrode 32 are sent out on different spiral airflows, the positive ions and negative ions are less likely to cancel each other out, and therefore the positive ions and negative ions can be efficiently diffused throughout the room.

[0046] 10, 11, and 12 are diagrams showing other examples of the arrangement of the ion generating unit 5 in a plan view of the blower 1. Figs. 10, 11, and 12 are diagrams showing a plan view of the blower 1 as seen from above, and for the sake of simplicity, only the impeller 10, blades 11, boss portion 12, motor portion 13, rotating shaft 14, lighting body 20, and ion generating unit 5 are shown as components of the blower 1. The arrows in the diagrams indicate the direction of rotation of the impeller 10.

[0047] 10, 11, and 12, the ion generating unit 5 is arranged outside the rotation radius of the blades 11. Specifically, in the examples shown in FIGS. 10, 11, and 12, the ion generating unit 5 is arranged outside the outer periphery of the impeller 10 and inside the outer periphery of the lighting body 20 in a plan view. In FIGS. 10, 11, and 12, the orientation of the ion generating unit 5 arranged in the blower 1 is different in a plan view. The orientation of the ion generating unit 5 in FIGS. 10, 11, and 12 corresponds to that in FIGS. 7, 8, and 9, respectively.

[0048] 10 , ion generation unit 5 is disposed such that first end 51, which is located downstream with respect to the rotation direction of impeller 10, is closer to the rotation center of impeller 10 than second end 52, which is located upstream. On the other hand, in the example of FIG. 11 , ion generation unit 5 is disposed such that second end 52, which is located upstream with respect to the rotation direction of impeller 10, is closer to the rotation center of impeller 10 than first end 51, which is located downstream. In this way, because the distance between first end 51 and rotation shaft 14 and the distance between second end 52 and rotation shaft 14 are different, the first distance from rotation shaft 14 to positive electrode 31 and the second distance from rotation shaft 14 to negative electrode 32 are different, as in the cases described with reference to FIGS. 7 and 8 .

[0049] 12, ion generation unit 5 is arranged such that first end 51 located on the downstream side and second end 52 located on the upstream side with respect to the rotation direction of impeller 10 are equidistant from the rotation center of impeller 10. In this case, as in the case described with reference to FIG. 9, regardless of whether positive electrode 31 and negative electrode 32 are arranged on the first end 51 side or the second end 52 side, the first distance from rotation shaft 14 to positive electrode 31 and the second distance from rotation shaft 14 to negative electrode 32 are equal.

[0050] In the cases of Figures 10, 11 and 12, as in the cases explained with reference to Figures 7, 8 and 9, respectively, the positive ions generated from the positive electrode 31 and the negative ions generated from the negative electrode 32 are sent out on different spiral air currents, making it difficult for the positive ions and negative ions to cancel each other out, and therefore the positive ions and negative ions can be efficiently diffused throughout the room.

[0051] 7 to 12, the ion generation unit 5 may be arranged either above or below the fan 3 in the axial direction. That is, the ion generation unit 5 can be arranged either above or below the fan 3, for example, as shown in FIGS. 1 and 6. Therefore, a total of 12 patterns can be envisioned by combining the six patterns shown in FIGS. 7 to 12 with two patterns in which the ion generation unit 5 is arranged above and below the fan 3.

[0052] FIG. 13 is a front cross-sectional view showing the wind speed distribution generated when fan 3 of blower 1 is operated. FIG. 13 shows the wind speed distribution of air blown out laterally from blower 1. In FIG. 13, the length of the arrows showing the wind speed distribution indicates the magnitude of the wind speed. When fan 3 rotates, air containing positive ions and negative ions is blown out from blower 1. As shown in FIG. 13, in the axial direction of blower 1, the wind speed of the air blowing out laterally is small near the mounting surface (ceiling surface L) of main body 2, and the wind speed of the air blowing out laterally is greatest at the position where blades 11 have the maximum diameter. The wind speed of the air blowing out laterally decreases with increasing distance from the position where blades 11 have the maximum diameter in the axial direction.

[0053] The ion generating unit 5 may be positioned so that the axial positions of the tips of the positive electrode 31 and the negative electrode 32 are at positions where the difference in wind speed is greatest. As the difference in wind speed increases at the axial positions of the tips of the positive electrode 31 and the negative electrode 32, the difference in speed at which the positive ions and negative ions generated from the positive electrode 31 and the negative electrode 32 are sent out laterally increases. Therefore, the positive ions generated from the positive electrode 31 and the negative ions generated from the negative electrode 32 are sent out on different spiral air currents and are less likely to cancel each other out, which allows the positive ions and negative ions to be efficiently diffused throughout the room.

[0054] In the above embodiment, the case has been described in which ion generation unit 5 is arranged in blower 1 in a tilted state, thereby arranging positive electrode 31 and negative electrode 32 at different positions in the axial direction of blower 1. However, the method of arranging positive electrode 31 and negative electrode 32 at different positions in the axial direction of blower 1 is not limited to this. For example, by making the lengths of positive electrode 31 and negative electrode 32 different, positive electrode 31 and negative electrode 32 can be arranged at different positions in the axial direction of blower 1. An example of this case will be described with reference to FIGS. 14A and 14B .

[0055] 14A and 14B are side views schematically showing other examples of the ion generation unit 5. In order to simplify the drawings, only the housing 30, the positive electrode 31, and the negative electrode 32 are shown as components of the ion generation unit 5 in Fig. 14A and 14B.

[0056] In the example shown in FIG. 14A , the positive electrode 31 is longer than the negative electrode 32. Also, in the example shown in FIG. 14B , the negative electrode 32 is longer than the positive electrode 31. The lengths of the positive electrode 31 and the negative electrode 32 can be changed as needed, for example, by changing the length of the brush-like portion of the electrode. By changing the lengths of the positive electrode 31 and the negative electrode 32 in this manner, the axial positions of the tips of the positive electrode 31 and the negative electrode 32 can be differentiated. Therefore, when the ion generating unit 5 shown in FIG. 14A or 14B is used, even if the ion generating unit 5 is placed directly on the horizontal lower surface 2b rather than being placed on the blower 1 in an inclined state as shown in FIG. 1 , the tips of the positive electrode 31 and the negative electrode 32 will be positioned at different axial positions. Therefore, the ion generating unit 5 can be easily installed while the axial positions of the electrodes can be differentiated.

[0057] FIG. 15 is a plan view schematically illustrating yet another example of the ion generation unit 5. In the example illustrated in FIGS. 4A and 4B, the positive electrode 31 and the negative electrode 32 are provided at the center in the short-side direction of the casing 30 in a plan view of the ion generation unit 5. However, the positive electrode 31 and the negative electrode 32 do not necessarily have to be provided at the center in the short-side direction of the casing 30. For example, as illustrated in FIG. 15, the positive electrode 31 and the negative electrode 32 may be arranged at a position closer to one of the two long sides of the casing 30 than the center in the short-side direction. Furthermore, even in the arrangement of the positive electrode 31 and the negative electrode 32 illustrated in FIG. 15, the lengths of the positive electrode 31 and the negative electrode 32 can be made different, as illustrated in FIG. 14A or 14B.

[0058] In the above embodiment, as an example, the blower is mainly described as a fan attached to a ceiling light attached to a ceiling, but the blower in the above may also be, for example, an electric fan, a circulator, a dehumidifier, a humidifier, an air purifier, an air conditioner, a deodorizer, a refrigerator, a vacuum cleaner, a cooking appliance, or other electronic device.

[0059] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0060] 1 blower 2 Main unit 2b Bottom side 2c Periphery 3 Fans 4. Lighting section 5 Ion generating unit 6 Stay 6a tip 7 Fan Guard 10 impeller 10a top end 11 Feather 12 Boss section 13 Motor section 14 Rotation axis 15 fixing screws 20 Lighting unit 20a top surface 21 Cavity 22 Lighting cover 23 Opening 30 Case 30a,30b opening 31 positive electrode 32 negative electrode 33,34 Induction electrode 35 Gate-type frame 51 1st end 52 2nd end

Claims

1. The main body and a fan disposed on the main body and having blades pivotally supported on a rotating shaft; an ion generating unit having a positive electrode and a negative electrode; Equipped with the positive electrode and the negative electrode are disposed at different positions in an axial direction along an extension direction of the rotation shaft. Blower.

2. The blower according to claim 1 , wherein the positive electrode and the negative electrode have different lengths, so that the positive electrode and the negative electrode are disposed at different positions in the axial direction.

3. The blower according to claim 1 or 2, wherein the ion generating section is arranged on a side of the fan where the main body is located in the axial direction.

4. The blower according to claim 1 or 2, wherein the ion generating section is arranged on a side opposite to a side on which the main body is located with respect to the fan in the axial direction.

5. The blower according to claim 1 or 2, wherein the ion generating section is disposed inside a radius of rotation of the blades.

6. The blower according to claim 1 or 2, wherein the ion generating section is disposed outside a radius of rotation of the blades.

7. 3. The blower according to claim 1, wherein the positive electrode and the negative electrode are arranged such that a first distance from the rotation shaft to the positive electrode is different from a second distance from the rotation shaft to the negative electrode.

8. 3. The blower according to claim 1, wherein the positive electrode and the negative electrode are arranged such that a first distance from the rotation shaft to the positive electrode is equal to a second distance from the rotation shaft to the negative electrode.

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