Blower

Abstract

To provide a blower that can efficiently generate positive ions and negative ions.SOLUTION: A blower includes a fan that generates airflow, a main body that has a cylindrical cavity through which the airflow is sent out in a direction along the rotational axis of the fan, and an ion generating unit having one or more pairs composed of a positive electrode and a negative electrode, wherein the ion generating unit is arranged in the cavity such that a first distance from the rotation axis of the fan to the positive electrode for all of the one or more pairs is longer than a second distance from the rotation axis of the fan to the negative electrode.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention 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, 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 each of the discharge electrodes, and generates positive ions and negative ions by discharging.

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

[0005] [Patent Document 1] JP 2018-179007 A (Published on November 15, 2018) Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned blower, positive and negative ions may be neutralized by the airflow generated by the blower fan in the same direction, and the balance between the amount of positive ions and the amount of negative ions in the indoor space may become poor.

[0007] In view of the above, one aspect of the present invention provides a blower that can efficiently diffuse positive ions and negative ions into a room. [Means for solving the problem]

[0008] (1) A blower according to one aspect of the present invention includes a fan that generates an airflow, a body having a cylindrical cavity through which the airflow is sent in a direction along the rotation axis of the fan, and an ion generating unit having one or more pairs formed of a positive electrode and a negative electrode, the ion generating unit being positioned in the cavity such that for each of the one or more pairs, a first distance from the rotation axis of the fan to the positive electrode is longer than a second distance from the rotation axis of the fan to the negative electrode.

[0009] (2) A blower according to one embodiment of the present invention includes a fan that generates an airflow, a body having a cylindrical cavity through which the airflow is sent in a direction along the rotation axis of the fan, and an ion generating unit having one or more pairs formed of a positive electrode and a negative electrode, the ion generating unit being positioned in the cavity such that for each of the one or more pairs, a first distance from the rotation axis of the fan to the positive electrode is shorter than a second distance from the rotation axis of the fan to the negative electrode.

[0010] (3) In a blower according to one aspect of the present invention, the ion generating unit is arranged in the hollow portion such that, for all of one or more of the pairs, the negative electrode is placed followed by the positive electrode in the direction in which the fan rotates.

[0011] (4) The ion generating unit is arranged in the hollow portion such that, for each of the one or more pairs, the positive electrode and the negative electrode are arranged in this order with respect to a direction in which the fan rotates.

[0012] (5) In a blower according to one aspect of the present invention, the ion generation section is configured so that, for all of the one or more pairs, the wind speed of the airflow at the position of the positive electrode is higher than the wind speed of the airflow at the position of the negative electrode.

[0013] (6) In a blower according to one aspect of the present invention, the ion generation section is configured so that, for all of the one or more pairs, the wind speed of the airflow at the position of the positive electrode is lower than the wind speed of the airflow at the position of the negative electrode. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front cross-sectional view showing the blower according to the embodiment. [Diagram 2] FIG. 2 is a bottom view showing the sending machine according to the embodiment. [Diagram 3] FIG. 2 is an exploded perspective view showing the sending machine according to the embodiment. [Figure 4] 4(a) is a perspective view showing an ion generating unit, and (b) is a plan view of the ion generating unit shown in FIG. [Diagram 5] 1 is a plan view showing a schematic view of an air current generated by a fan of a blower when viewed downward from the ceiling side. FIG. [Figure 6] 4 is a plan view showing a schematic relationship between an ion generating unit disposed on a lower surface of a main body and a passing air current. FIG. [Figure 7] 4 is a plan view showing a schematic relationship between an ion generating unit disposed on a lower surface of a main body and a passing air current. FIG. [Figure 8] 4 is a plan view showing a schematic relationship between an ion generating unit disposed on a lower surface of a main body and a passing air current. FIG. [Figure 9] 10A is a plan view showing another ion generating unit, and FIG.10B is a plan view showing a schematic diagram of the relationship between another ion generating unit arranged on the lower surface of the main body and a passing airflow. [Figure 10] 10(a) is a perspective view showing a first modified example of the ion generating unit, (b) is a plan view of the ion generating unit shown in Fig. 10(a), and (c) is a plan view showing a schematic relationship between the ion generating unit arranged on the lower surface of the main body and a passing airflow. [Figure 11] 11(a) is a perspective view showing a second modified example of the ion generating unit, (b) is a plan view of the ion generating unit shown in Fig. 11(a), and (c) is a plan view showing a schematic relationship between the ion generating unit disposed on the lower surface of the main body and a passing airflow. [Figure 12] 4 is a plan view showing a schematic relationship between an ion generating unit provided in a lighting body and a passing air current. FIG. [Figure 13]FIG. 4 is a side view showing the wind speed distribution generated when the blower fan is operated. [Figure 14] 1A is a plan view showing a conventional blower, and FIG. 1B is a plan view showing the blower according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [Embodiment 1] A first embodiment of the present disclosure will be described with reference to Figures 1 to 6. Figure 1 is a front cross-sectional view showing a blower according to the present embodiment. Figure 2 is a bottom view showing the blower according to the present embodiment.

[0016] The blower 1 includes a main body 2, a fan 3 disposed in the main body 2, and an ion generating unit 5 having a positive electrode 31 and a negative electrode 32. The ion generating unit 5 is disposed at a predetermined position in the main body 2, and will be described in detail later.

[0017] The main body 2 is formed, for example, in a substantially cylindrical shape, and a mounting member (not shown) for mounting to a ceiling L is provided on the back side of the main body 2. For example, a hook ceiling is used as the mounting member. The main body 2 also includes an illumination main body 20 of the illumination unit 4, which will be described later.

[0018] The main body 2 also houses a power supply board and a control board for the fan 3, the lighting unit 4, and the ion generating unit 5, and the fan 3 is placed in the center of the bottom surface of the main body 2.

[0019] 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, for example, an axial flow fan.

[0020] Impeller 10 has a plurality of blades 11, 11 arranged on the outer circumferential surface of a cylindrical boss portion 12. Impeller 10 supports a rotating shaft 14 of a motor portion 13 on boss portion 12, and the tip of rotating shaft 14 protruding from the center of the boss portion is fixed by a fixing screw 15. Impeller 10 has a radius R.

[0021] Between the lower surface 2b of the main body 2 and the upper end 10a of the impeller 10, a space S is formed through which air sent to the impeller 10 flows.

[0022] As shown in FIG. 2, impeller 10 is driven by motor unit 13 to rotate in the positive clockwise direction as viewed from below, as indicated by arrow G, around rotation axis 14 perpendicular to the mounting surface (ceiling surface L) of main body 2, thereby blowing out airflow downward.

[0023] 3, a plurality of stays 6, 6, 6 are arranged at a predetermined angle on the peripheral portion 2c of the main body 2, and the lighting unit 4 is attached to the tip 6a of each stay 6. Between the stays 6, circulation ports S1, S1, S1 are formed to allow air to flow into the upper end 10a of the fan 3.

[0024] 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 so that the hollow portion 21 surrounds the outer periphery of the fan 3. The lighting body 20 houses an LED or the like as a light source, and the light source is covered with a lighting cover 22.

[0025] 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, into a polygonal cross section.

[0026] The impeller 10 is housed in a hollow portion 21 of the lighting body 20 and is supported on a rotating shaft 14 of a motor portion 13 for driving it to rotate. The tip of the rotating shaft 14 is fixed with a fixing screw 15, making it freely rotatable.

[0027] The illumination unit 4 may be configured such that the illumination body 20 is divided into four in the circumferential direction, and the divided illumination bodies are connected to each other in an annular shape.

[0028] 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.

[0029] The ion generating unit 5 shown in FIG. 4 includes, for example, a housing 30 having a generally elongated box shape, a positive electrode 31 and a negative electrode 32 that protrude from openings 30a, 30b in the upper part of the housing 30 and generate a discharge, and induction electrodes 33, 34 that face the discharge electrodes and are provided on the periphery of each of the openings 30a, 30b.

[0030] Furthermore, gate-shaped frames 35, 35 are 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. Note that a plurality of gate-shaped frames 35, 35 may be provided in the short side direction of the upper part of the housing. The discharge electrodes (positive electrode 31, negative electrode 32) and induction electrodes 33, 34 of the ion generating unit 5 are connected to a control board of the main body 2 and are controlled in discharge.

[0031] The positive electrode 31 and the negative electrode 32 are formed, for example, in a generally brush shape by bundling a plurality of thread-like conductors, and the lower part is fixed inside the housing 30. The positive electrode 31 and the negative electrode 32 may be configured, for example, in a generally needle shape.

[0032] Ion generating unit 5 equipped with a brush-like electrode 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 a needle-like electrode.

[0033] In the ion generation 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 discharge electrode, a corona discharge occurs at the tips of the positive electrode 31 and negative electrode 32 of the same discharge electrode, generating positive ions and negative ions.

[0034] The positive ions are hydrogen ions (H + ) is a cluster ion formed by clustering multiple water molecules around H +It is expressed as (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).

[0035] In addition, 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 the floating mold spores.

[0036] Ion generating unit 5 generates discharge products, such as electrons, ions, radicals, ozone, and the like, in the air by discharge.

[0037] 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, so if the positive ions and negative ions are placed on air currents in the same direction (see, for example, FIG. 14(a)), they will cancel each other out and be neutralized, and will not be diffused far into the room, reducing the effect that would be achieved by the presence of both positive and negative ions together. Therefore, the ion generating unit 5 is arranged at a predetermined position on the main body 2 so that the positive ions and negative ions generated by the ion generating unit can be diffused widely. The ion generating unit 5 may be covered with a case with an opening to prevent hands and fingers from directly touching the exposed electrodes.

[0038] First, the airflow generated by the fan 3 of the blower 1 will be described. Fig. 5 is a plan view showing the airflow generated by the fan 3 of the blower 1 when viewed downward from the ceiling side (the upper end side of the impeller 10). Note that downward from the ceiling side is the direction of line VV in Fig. 1.

[0039] When the lighting unit 4 of the blower 1 is turned on, the room is illuminated, and when the impeller 10 rotates in the forward direction indicated by the arrow G (see FIG. 2) by the rotational drive of the motor unit 13, air near the ceiling is supplied to the intake side (the upper end 10a side of the impeller 10) through the circulation port S1 as indicated by the arrow K1 (see FIG. 1). The air is then sent downward by the impeller 10, passing from the opening 23 of the lighting body 20 to the fan guard 7 as indicated by the arrow K2 (see FIG. 1). In this way, the blower 1 circulates air in the room.

[0040] The ion generating unit 5 is placed on the lower surface 2b of the main body 2, and an upper portion of the ion generating unit 5 is positioned to face the upper end 10a of the impeller 10 of the fan 3. A positive electrode 31 and a negative electrode 32, which are discharge electrodes, and two induction electrodes 33, 34 are provided on the upper portion of the ion generating unit 5, and positive ions and negative ions generated at the positive electrode 31 and the negative electrode 32 by 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.

[0041] As shown in Figures 3 and 6, the ion generating unit 5 is arranged on the underside 2b of the main body 2 so that a first distance r1 from the rotation shaft 14 of the fan 3 to the positive electrode 31 and a second distance r2 from the rotation shaft 14 of the fan 3 to the negative electrode 32 are different.

[0042] With this configuration, the positive ions generated by the positive electrode 31 of the ion generating unit 5 and the negative ions generated by the negative electrode 32 are carried by different air currents W2, W1, respectively, so that immediately after the generation of the positive and negative ions, the neutralization of the positive ions and the negative ions is reduced and the positive ions and the negative ions are carried by the different air currents W2, W1, respectively, and are efficiently released into the room, while the amount of positive ions and the amount of negative ions in the room can be well balanced.

[0043] Furthermore, the fan 3 generates a swirling wind W by rotating, and the negative electrode 32 of the ion generating unit 5 is disposed on the windward side of the swirling wind W, and the positive electrode 31 of the ion generating unit 5 is disposed on the leeward side of the swirling wind W. Note that a position away from the rotation shaft 14 of the fan 3 is defined as the windward side of the swirling wind W, and a position close to the rotation shaft 14 of the fan 3 is defined as the leeward side.

[0044] According to this configuration, negative ions generated by negative electrode 32 of ion generating unit 5 are blown from the upwind side of swirling air W, so that negative ions that tend to disappear can be diffused in large quantities throughout the indoor space.

[0045] Ion generating unit 5 is disposed on bottom surface 2b of main body 2 such that negative electrode 32 and positive electrode 31 are arranged in this order with respect to the direction in which fan 3 rotates.

[0046] As shown in Figure 6, it is preferable to arrange the ion generating unit 5 on the underside 2b of the main body 2 so that a second distance r2 from the rotation shaft 14 of the fan 3 to the negative electrode 32 of the ion generating unit 5 is longer than a first distance r1 from the rotation shaft 14 of the fan 3 to the positive electrode 31 of the ion generating unit 5.

[0047] With this configuration, positive ions generated by positive electrode 31 of ion generating unit 5 are carried to airflow W2 close to rotation shaft 14, and negative ions generated by negative electrode 32 are carried to airflow W1 far from rotation shaft 14. By carrying positive and negative ions to different airflows W2 and W1, respectively, neutralization of positive ions and negative ions is reduced, positive ions and negative ions can be efficiently released into the room, and the amount of positive ions and negative ions in the room can be well balanced.

[0048] Moreover, the first distance r1 is shorter than the rotation radius R of the blades 11 of the impeller 10. With this configuration, the positive electrode 31 is located inside the rotation radius R of the blades 11, so that positive ions generated at the positive electrode 31 can be carried by the airflow, sent from the intake side to the outlet side of the fan 3, and released into the room.

[0049] Furthermore, ion generating unit 5 is disposed on underside 2b of main body 2 at a position close to the longitudinal tip side of blades 11 of impeller 10. Negative electrode 32 is located on underside 2b of main body 2 and in the vicinity of the maximum point of the air velocity distribution generated by fan 3. Positive electrode 31 is located on underside 2b of main body 2 at a position closer to rotation shaft 14 than negative electrode 32 (a position where the air velocity is lower than negative electrode 32).

[0050] With this configuration, the positive and negative ions generated in the ion generating unit 5 can be carried by the strong air current generated near the tips of the blades 11 of the impeller 10, so that the positive and negative ions can be sent into the room without increasing the rotation speed of the fan 3.

[0051] 7 may be rotated 180 degrees and disposed on the underside 2b of the main body 2. The negative electrode 32 is located on the underside 2b of the main body 2 and in the vicinity of the maximum point of the air velocity distribution generated by the fan 3. The positive electrode 31 is located on the underside 2b of the main body 2 and at a position closer to the rotation shaft 14 than the negative electrode 32 (at a position where the air velocity is lower than that of the negative electrode 32). With this configuration, the same effects as those of the above embodiment can be achieved.

[0052] In the ion generating unit 5 of FIG. 8, the positive electrode 31 is located on the windward side of the swirling wind W, and the negative electrode 32 is located on the leeward side of the swirling wind W. The ion generating unit 5 may be disposed on the lower surface 2b of the main body 2 so that the first distance r1 is longer than the second distance r2. The positive electrode 31 is located on the lower surface 2b of the main body 2 and in the vicinity of the maximum of the wind speed distribution generated by the fan 3. The negative electrode 32 is located on the lower surface 2b of the main body 2 at a position closer to the rotation shaft 14 than the positive electrode 31 (at a position where the wind speed is lower than that of the positive electrode 31). Even in this configuration, the positive ions generated by the positive electrode 31 and the negative ions generated by the negative electrode 32 of the ion generating unit 5 are carried by different air currents W2 and W1, respectively, so that the neutralization of the positive ions and the negative ions is reduced immediately after the generation of the positive and negative ions, and the positive ions and the negative ions are carried by the different air currents W2 and W1, respectively, and are efficiently released into the room, and the amount of positive ions and the amount of negative ions in the room can be well balanced.

[0053] As shown in Figure 4(b), the above-mentioned ion generation unit 5 is configured such that the tip of the positive electrode 31 and the tip of the negative electrode 32 are arranged side by side on a line that crosses the center of the housing 30 in a planar view. However, as shown in Figure 9(a), the ion generation unit 5-1 may be configured such that the tip of the positive electrode 31 and the tip of the negative electrode 32 are arranged on a diagonal line of the housing 30 in a planar view.

[0054] When the ion generating unit 5-1 is placed on the underside 2b of the main body 2, as shown in Fig. 9(b), the distances from the rotation shaft 14 of the fan 3 to both corners of the housing 30 of the ion generating unit 5-1 are equal, but the distance r1 from the rotation shaft 14 of the fan 3 to the positive electrode 31 and the distance r2 from the rotation shaft 14 to the negative electrode 32 can be arranged to be different. The negative electrode 32 is located on the underside 2b of the main body 2 and in the vicinity of the maximum wind speed distribution of the swirling wind W generated by the fan 3. The positive electrode 31 is located on the underside 2b of the main body 2 at a position closer to the rotation shaft 14 than the negative electrode 32 (at a position where the wind speed is lower than that of the negative electrode 32). With this configuration, it is possible to achieve the same effects as those of the above-mentioned embodiment. In addition, the above-mentioned ion generating unit 5-1 is configured so that the tips of the positive electrode 31 and the negative electrode 32 are arranged on a diagonal line slanting downward to the right of the housing 30 when viewed in a plane, but the tips of the positive electrode 31 and the negative electrode 32 may also be arranged on a diagonal line slanting upward to the right of the housing 30 so that the relationship between distance r1 and distance r2 in Figure 9(b) is distance r2 < distance r1.

[0055] As shown in Figs. 10 and 11, a modified example of ion generating unit 5 may have a plurality of positive electrodes and negative electrodes as discharge electrodes, and a plurality of induction electrodes.

[0056] [Variation 1] 10(a) and 10(b), for example, two positive electrodes 31-1, 31-2 and two negative electrodes 32-1, 32-2 are arranged in a horizontal line in housing 30 of ion generation unit 5-2. Ion generation unit 5-2 having a plurality of electrodes is installed in main body 2.

[0057] As shown in Fig. 10(c), the ion generating unit 5-2 is disposed on the lower surface 2b of the main body 2 such that a first distance r1-1 from the rotation shaft 14 of the fan 3 to the positive electrode 31-1 is different from a second distance r2-1 from the rotation shaft 14 of the fan 3 to the negative electrode 32-1. Alternatively, the ion generating unit 5-2 is disposed on the lower surface 2b of the main body 2 such that a first distance r1-2 from the rotation shaft 14 of the fan 3 to the positive electrode 31-2 is different from a second distance r2-2 from the rotation shaft 14 of the fan 3 to the negative electrode 32-2. The negative electrodes 32-1 and 32-2 are located on the lower surface 2b of the main body 2 and in the vicinity of the maximum wind speed distribution of the swirling wind W generated by the fan 3. The positive electrodes 31-1 and 31-2 are located on the lower surface 2b of the main body 2 and at positions closer to the rotation shaft than the negative electrodes 32-1 and 32-2 (positions where the wind speed is lower than the negative electrodes 32-1 and 32-2).

[0058] With this configuration, a large amount of positive ions generated by the multiple positive electrodes 31-1, 31-2 of ion generating unit 5-2 and a large amount of negative ions generated by the multiple negative electrodes 32-1, 32-2 are carried in different airflows W2, W1, respectively, thereby reducing neutralization of the positive ions and negative ions, allowing a large amount of positive ions and a large amount of negative ions to be efficiently released into the room, and the amount of positive ions and negative ions in the room to be well balanced.

[0059] In addition, fan 3 generates a swirling wind W by rotating. Negative electrodes 32-1, 32-2 of ion generation unit 5-2 are arranged on the windward side of swirling wind W, and positive electrodes 31-1, 31-2 of ion generation unit 5-2 are arranged on the leeward side of swirling wind W.

[0060] According to this configuration, a large amount of negative ions generated by the multiple negative electrodes 32-1, 32-2 of ion generating unit 5-2 are blown from the upwind side of the swirling wind, so that negative ions that tend to disappear can be diffused more widely throughout the room.

[0061] Further, the ion generating unit 5-2 is disposed on the lower surface 2b of the main body 2 such that the negative electrodes 32-1, 32-2 and the positive electrodes 31-1, 31-2 are arranged in this order with respect to the direction in which the fan 3 rotates.

[0062] Furthermore, it is preferable to set the second distance r2-1 from the rotation shaft 14 of the fan 3 to the negative electrode 32-1 of the ion generation unit 5-2 longer than the first distance r1-1 from the rotation shaft 14 of the fan 3 to the positive electrode 31-1 of the ion generation unit 5-2. Alternatively, it is preferable to set the second distance r2-2 from the rotation shaft 14 of the fan 3 to the negative electrode 32-2 of the ion generation unit 5-2 longer than the first distance r1-2 from the rotation shaft 14 of the fan 3 to the positive electrode 31-2 of the ion generation unit 5-2.

[0063] With this configuration, a large amount of positive ions generated by the multiple positive electrodes 31-1, 31-2 of ion generating unit 52 are carried to airflow W2 close to rotation axis 14, and a large amount of negative ions generated by the multiple negative electrodes 32-1, 32-2 are carried to airflow W1 far from rotation axis 14. By carrying large amounts of positive and negative ions to different airflows W2, W1, neutralization of positive ions and negative ions decreases immediately after the generation of positive and negative ions, and a large amount of positive ions and a large amount of negative ions can be efficiently released into the room, while the amount of positive ions and the amount of negative ions in the room can be well balanced.

[0064] Moreover, the first distance r1 is shorter than the rotation radius R of the blades 11 of the impeller 10. With this configuration, the positive electrodes 31-1, 31-2 are located inside the rotation radius R of the blades 11, so that positive ions generated at the positive electrodes 31-1, 31-2 can be carried by the airflow and sent from the intake side to the outlet side of the fan 3, and released into the room.

[0065] Furthermore, ion generating unit 5-2 is disposed at a position close to the longitudinal tip side of blades 11 of impeller 10 on the underside of main body 2. Negative electrode 32-2 is located on underside 2b of main body 2 and in the vicinity of the maximum wind speed distribution of swirling wind W generated by fan 3. Positive electrode 31-2 is located on underside 2b of main body 2 and at a position closer to rotation shaft 14 than negative electrode 32-2 (a position where the wind speed is lower than negative electrode 32-2).

[0066] With this configuration, a large amount of positive ions and a large amount of negative ions generated in the ion generating unit 5-2 can be carried by the strong air current generated near the tips of the blades 11 of the impeller 10, so that a large amount of positive and negative ions can be sent out so as to be diffused throughout the room without increasing the rotation speed of the fan.

[0067] [Variation 2] Furthermore, as shown in Figures 11(a) and 11(b), the ion generation unit 5-3 may be configured so that a pair of a positive electrode 31-1 and a negative electrode 32-1 is arranged next to each other, and further a pair of a positive electrode 31-2 and a negative electrode 32-2 is arranged next to each other.

[0068] 11(c), the ion generating unit 5-3 is preferably disposed on the underside 2b of the main body 2 so that a first distance r1-1 from the rotation shaft 14 of the fan 3 to the positive electrode 31-1 is different from a second distance r2-1 from the rotation shaft 14 of the fan 3 to the negative electrode 32-1. Alternatively, the ion generating unit 5-3 is preferably disposed on the underside 2b of the main body 2 so that a first distance r1-2 from the rotation shaft 14 of the fan 3 to the positive electrode 31-2 is different from a second distance r2-2 from the rotation shaft 14 of the fan 3 to the negative electrode 32-2.

[0069] With this configuration, a large amount of positive ions generated by the multiple positive electrodes 31-1, 31-2 of ion generating unit 5-3 and a large amount of negative ions generated by the multiple negative electrodes 32-1, 32-2 are carried in different airflows, thereby reducing neutralization of the positive ions and negative ions, enabling a large amount of positive ions and a large amount of negative ions to be efficiently released into the room, and the amount of positive ions and negative ions in the room to be well balanced.

[0070] Moreover, the fan 3 generates a swirling wind W by rotating, and the negative electrode 32-2 of the ion generation unit 5-3 is arranged on the windward side of the swirling wind W, and the positive electrode 31-2 of the ion generation unit 5-3 is arranged on the leeward side of the swirling wind W. Furthermore, the negative electrode 32-1 of the ion generation unit 5-3 is arranged on the windward side of the swirling wind W, and the positive electrode 31-1 of the ion generation unit 5-3 is arranged on the leeward side of the swirling wind W.

[0071] According to this configuration, a large amount of negative ions generated by the multiple negative electrodes of ion generating unit 5-3 are blown from the upwind side of swirling air W, so that negative ions that tend to disappear can be diffused more widely throughout the indoor space.

[0072] Moreover, the ion generating unit 5-3 is disposed on the lower surface 2b of the main body 2 so that the negative electrode and the positive electrode are arranged in this order with respect to the direction in which the fan 3 rotates.

[0073] Furthermore, it is preferable that the second distance r2-2 from the rotation shaft 14 of the fan 3 to the negative electrode 32-2 of the ion generation unit 5-3 is longer than the first distance r1-2 from the rotation shaft 14 of the fan 3 to the positive electrode 31-2 of the ion generation unit 5-3. Alternatively, it is preferable that the second distance r2-1 from the rotation shaft 14 of the fan 3 to the negative electrode 32-1 of the ion generation unit 5-3 is longer than the first distance r1-1 from the rotation shaft 14 of the fan 3 to the positive electrode 31-1 of the ion generation unit 5-3.

[0074] With this configuration, a large amount of positive ions generated by the multiple positive electrodes 31-1 and 31-2 of ion generating unit 5-3 are carried to the airflow close to rotation axis 14, and a large amount of negative ions generated by the multiple negative electrodes 32-1 and 32-2 are carried to the airflow far from rotation axis 14. By carrying large amounts of positive and negative ions to different airflows, neutralization of positive ions and negative ions decreases immediately after the positive and negative ions are generated, and a large amount of positive ions and a large amount of negative ions can be efficiently released into the room, while maintaining a good balance between the amounts of positive ions and negative ions in the room.

[0075] Moreover, the first distance r1 is shorter than the rotation radius R of the blades 11 of the impeller 10. With this configuration, the positive electrodes 31-1, 31-2 are located inside the rotation radius R of the blades 11, so that positive ions generated at the positive electrodes 31-1, 31-2 can be carried by the airflow, sent from the intake side to the outlet side of the fan 3, and released into the room.

[0076] Furthermore, ion generating unit 5-3 is disposed at a position close to the longitudinal tip side of blades 11 of impeller 10 on the underside 2b side of main body 2. Negative electrode 32-2 is located on underside 2b of main body 2 and in the vicinity of the maximum wind speed distribution of swirling wind W generated by fan 3. Positive electrode 31-2 is located on underside 2b of main body 2 at a position closer to rotation shaft 14 than negative electrode 32-2 (a position where the wind speed is lower than negative electrode 32-2).

[0077] With this configuration, a large amount of positive ions and a large amount of negative ions generated in the ion generating unit 5-3 can be carried by the strong air current generated near the tips of the blades 11 of the impeller 10, so that a large amount of positive and negative ions can be sent out so as to be diffused throughout the room without increasing the rotation speed of the fan.

[0078] A plurality of the ion generating units 5 may be provided on the lower surface 2b of the main body 2. For example, two ion generating units 5 may be disposed diagonally opposite each other on the lower surface 2b of the main body 2 so that the rotation axis 14 passes through the lower surface 2b of the main body 2.

[0079] FIG. 12 is a plan view diagrammatically illustrating the air current generated by fan 3 of blower 1 when viewed downward from line XII-XII in FIG.

[0080] As shown in Figures 12(a) and 12(b), the ion generating unit 5 is arranged outside the rotation radius R of the blade 11, and may be arranged on the upper surface 20a of the lighting body 20 included in the main body 2 so that the distance r1 from the rotation axis 14 to the positive electrode 31 and the distance r2 from the rotation axis 14 to the negative electrode 32 are different.

[0081] Furthermore, because the wind force is strong in the area near the tip of the impeller 10 of the fan 3, the ion generating unit 5 is disposed on the upper surface 20a of the lighting body 20 such that the negative electrode 32 is closer to the rotation shaft 14 than the positive electrode 31. In other words, the distance r2 from the rotation shaft 14 to the negative electrode 32 is shorter than the distance r1 from the rotation shaft 14 to the positive electrode 31. Note that the ion generating unit 5 in Fig. 12(b) is disposed at a position on the upper surface 20a rotated 180 degrees from the position on the upper surface 20a of the lighting body 20 shown in Fig. 12(a).

[0082] In this configuration, the positive ions generated by the positive electrode 31 of the ion generating unit 5 and the negative ions generated by the negative electrode 32 are carried by different air currents W3 and W4, respectively, so that immediately after the generation of the positive and negative ions, the neutralization of the positive ions and the negative ions is reduced and the positive ions and the negative ions are carried by the different air currents W3 and W4, respectively, and are efficiently released into the room, and the amount of positive ions and negative ions in the room can be balanced.

[0083] The blower according to the first embodiment of the present disclosure described above will be described in further detail with reference to Fig. 13 and Fig. 14. Fig. 13 is a side view showing the wind speed distribution of the wind generated when the fan 3 of the blower 1 is operated. In Fig. 14, the amount of ions generated in the ion generating unit 5 is measured and compared when the distance r1 from the rotating shaft 14 of the main body 2 to the positive electrode 31 of the ion generating unit 5 and the distance r2 from the negative electrode 32 are equal and when the distances r1 and r2 are different.

[0084] 13, when the blower 1 rotates the fan 3, it blows out air containing positive and negative ions generated in the ion generating unit 5 from the opening 23 of the lighting body 20. The wind force is small in the peripheral area directly below the rotation shaft 14 of the fan 3. The wind force is large in the area directly below the tip of the impeller 10 of the fan 3.

[0085] 14(a), the ion generating unit is installed at a position on the underside of the main body where the distance r1 from the rotating shaft to the positive electrode of the ion generating unit is equal to the distance r2 from the rotating shaft to the negative electrode of the ion generating unit. For example, r1 = r2 = 90 mm.

[0086] When the blower 101 shown in FIG. 14(a) was installed in a closed room and positive ions and negative ions were measured at a predetermined measurement point, the positive ions were approximately 80,000 / cm3 and the negative ions were approximately 330,000 / cm3. 3 It was.

[0087] Considering that there are fewer positive ions than negative ions, it is believed that this is because the positive electrode of the ion generating section on the underside of the main unit is located on the upwind side and the negative electrode is located on the downwind side, and therefore the positive ions on the upwind side are neutralized with the negative ions on the downwind side and reduced, resulting in a smaller amount of positive ions diffusing throughout the room compared to the negative ions.

[0088] 14(b), the ion generating unit is installed on the underside of the main body so that the distance r1 from the rotation axis to the positive electrode of the ion generating unit and the distance r2 to the negative electrode are different. For example, r1 = 85 mm, and r2 = 105 mm.

[0089] The blower 1 shown in FIG. 14(b) was installed in a closed room, and positive ions and negative ions were measured at a predetermined measurement point. For example, the positive ions were approximately 370,000 / cm 3 , negative ions are about 320,000 / cm 3 It was.

[0090] Considering the amount of positive and negative ions, it is believed that because the negative electrode of the ion generating part on the underside of the main unit is located towards the tip of the fan, and the positive electrode is located towards the rotating shaft, the positive and negative ions are carried by different air currents, reducing the number of ions that are neutralized and eliminated, resulting in a balanced spread of positive and negative ions throughout the room.

[0091] In the above embodiment, as an example, the blower has mainly been described as a case in which a fan is attached to a ceiling light attached to a ceiling, but the blower in the above case may also be, for example, an electronic device such as a dehumidifier, a humidifier, an air purifier, an air conditioner, a deodorizer, a refrigerator, a vacuum cleaner, or a cooking appliance.

[0092] 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]

[0093] L Ceiling S space S1 flow port 1 Blower 2 Main unit 2a Top side 2b Bottom side 2c Periphery 3 Fan 4. Lighting section 5 Ion generating unit 6 Stay 7 Fan Guard 10 Impeller 10a top end 11 Feather 12 Boss section 13 Motor section 14 Rotational Axis 15 Fixing screw 20 Lighting unit 20a top surface 21 Cavity 22 Lighting cover 23 Opening 30 Case 31 Positive electrode 32 negative electrode 33 Induction electrode 34 Induction electrode 35 Gate Frame

Claims

1. A fan that generates airflow; a main body having a cylindrical cavity formed therein through which the airflow is sent in a direction along a rotation axis of the fan; An ion generating unit having one or more pairs each formed of a positive electrode and a negative electrode, The fan is an axial flow fan that generates a swirling wind as the air current, the ion generation unit is disposed in the hollow portion such that, for each of the one or more pairs, a first distance from a rotation shaft of the fan to the positive electrode is longer than a second distance from the rotation shaft of the fan to the negative electrode, and the negative electrode is disposed next to the positive electrode in the direction in which the fan rotates. Blower.

2. A fan that generates airflow; a main body having a cylindrical cavity formed therein through which the airflow is sent in a direction along a rotation axis of the fan; An ion generating unit having one or more pairs each formed of a positive electrode and a negative electrode, The fan is an axial flow fan that generates a swirling wind as the air current, the ion generation unit is disposed in the hollow portion such that, for each of the one or more pairs, a first distance from a rotation shaft of the fan to the positive electrode is shorter than a second distance from the rotation shaft of the fan to the negative electrode, and the negative electrode is disposed next to the positive electrode in the direction in which the fan rotates. Blower.

3. A fan that generates an airflow; a main body having a cylindrical cavity formed therein through which the airflow is sent in a direction along a rotation axis of the fan; An ion generating unit having one or more pairs each formed of a positive electrode and a negative electrode, The fan is an axial flow fan that generates a swirling wind as the air current, the ion generation unit is disposed in the hollow portion such that, for each of the one or more pairs, a first distance from a rotation shaft of the fan to the positive electrode is longer than a second distance from the rotation shaft of the fan to the negative electrode, and the positive electrode is disposed next to the negative electrode in the direction in which the fan rotates. The blower according to claim 1 or 2.

4. A fan that generates an airflow; a main body having a cylindrical cavity formed therein through which the airflow is sent in a direction along a rotation axis of the fan; An ion generating unit having one or more pairs each formed of a positive electrode and a negative electrode, The fan is an axial flow fan that generates a swirling wind as the air current, the ion generation unit is disposed in the hollow portion such that, for each of the one or more pairs, a first distance from a rotation shaft of the fan to the positive electrode is shorter than a second distance from the rotation shaft of the fan to the negative electrode, and the positive electrode is placed first and then the negative electrode is placed next to the rotation shaft of the fan. The blower according to claim 1 or 2.

5. the ion generation unit is configured such that, for each of the one or more pairs, the wind speed of the airflow at the position of the positive electrode is higher than the wind speed of the airflow at the position of the negative electrode; The blower of claim 1.

6. the ion generation unit is configured such that, for each of the one or more pairs, the wind speed of the airflow at the position of the positive electrode is lower than the wind speed of the airflow at the position of the negative electrode; The blower of claim 2.

Images