JP4212037B2 - Blower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blower represented by a hair dryer, and more particularly to a blower in which an ion generator is disposed inside a main body case.
[0002]
[Prior art]
A hair dryer in which an ion generator is arranged inside a main body case is known, for example, in Patent Document 1 and Patent Document 2 related to the application of the present applicant. There, the crossing part of the heater holder assembled in a cross shape is cut out, and the circuit board and the transformer constituting the ion generator are arranged there. In addition, a tapered ion path is provided between the front edge of the heater holder and the blow grill, and an electrode unit is disposed inside the ion path, so that negative ions generated by the electrode unit are blown into the blown air flow. It avoids widespread diffusion or neutralization.
[0003]
[Patent Document 1]
Japanese Patent Laying-Open No. 2003-70526 (paragraph number 0024, FIG. 1)
[Patent Document 2]
JP 2003-79421 A (paragraph number 0029, FIG. 1)
[0004]
[Problems to be solved by the invention]
According to the dryers of Patent Documents 1 and 2, since the electrode unit is disposed inside the tapered tapered ion passage, negative ion diffusion and neutralization can be well prevented. However, since the electrode unit is disposed between the front end of the heater holder and the blowout grill, it is inevitable that a front and rear gap is formed between the electrode unit and the transformer, and a connection lead that connects the two is formed between the ion passage and the transformer. Exposed in the space between. The problem is that when a part of the air flow fed along the inner surface of the cylindrical main body case flows into the ion passage through the front and rear gaps, an annoying wind noise is generated due to contact with the connection lead. In the point.
[0005]
The ion passage is partitioned by a tapered tapered cylinder, and an electrode unit is disposed therein. Therefore, although it is possible to restrict the negative ions generated by the electrode unit from diffusing widely into the blown air flow, the cylinder that is always in contact with the negative ions tends to be negatively charged, and the negative charges and negative ions charged on the cylinder are As a result of repulsion, the amount of negative ions delivered decreases.
[0006]
The object of the present invention is to optimize the arrangement structure of the ion generator inside the main body case, thereby eliminating the generation of wind noise due to the connection lead connecting the discharge electrode and the transformer, and thus reducing the noise level during use. It is to provide a quiet air blower. The object of the present invention is to prevent negative ions from being widely diffused in the blown air flow, while suppressing the peripheral structure of the electrode unit from being negatively charged, and thus the amount of negative ions sent from the blower It is providing the air blower which can improve.
[0007]
[Means for Solving the Problems]
In the air blower of the present invention, a fan 7, a fan driving motor 8, an air heating heater 9, and an ion generator are provided inside the main body case 1. The ion generator includes a discharge current adjustment unit 24 disposed in the central portion of the heater holder 18 and a discharge unit 25 disposed adjacent to the discharge current adjustment unit 24 and facing the blow grill 13. The discharge unit 25 includes a container-like electrode holder 32 whose rear surface is open, a discharge electrode 33 assembled to the electrode holder 32, and a counter electrode 34. The outer surface of the connecting leads 36, 37 connecting the discharge current adjusting unit 24 and a discharge unit 25, that is covered with the electrode holder 32.
[0008]
Electrode holder 32 has a front Subomari tapered cover 40, and an electrode support 41 provided on the cover 4 0 supporting the discharge electrodes 33 and the counter electrode 34, and the discharge current adjusting unit 24 discharge the outer surface of the connecting leads 36, 37 connecting the unit 25, that is covered with a cover 40.
[0009]
The cover 40 and the electrode supporting body 41 of the electrode holder 32, formed integrally.
[0010]
The heater holder 18 includes an insulating plate 22.
[0011]
The discharge current adjustment unit 24 and the discharge unit 25 attached to the heater holder 18 include an engagement protrusion 45 formed on the insulating plate 22 and a step 44 formed on the opening peripheral surface of the cover 40 of the electrode holder 32. It fixed in the engagement structure.
[0012]
An ion discharge port 53 is provided at the center of the blowing grill 13 facing the discharge unit 25, and the blowing grill 13 and the ground piece 51 provided on the grip 3 are connected to each other through a conductive path 52 so as to be energized. The
[0013]
[Effects of the invention]
In the air blower according to the present invention, the discharge current adjusting unit 24 and the discharge unit 25 constituting the ion generator are disposed adjacent to the central portion of the heater holder 18. In addition, by covering the outer surfaces of the connection leads 36 and 37 connecting the units 24 and 25 with the electrode holder 32 of the discharge unit 25, the connection leads 36 and 37 are exposed to the air flow supplied by the fan 7. Prevented. Therefore, according to the present invention, it is possible to eliminate the generation of wind noise due to the connection leads 36 and 37 connecting the discharge electrode and the transformer, and the noise level during use is reduced by that amount, and a quiet blower is obtained. Since the outer surfaces of the connection leads 36 and 37 are covered with the electrode holder 32, it is possible to prevent the connection leads 36 and 37 from being heated from the outside, and dust or the like carried by the air stream enters the electrode holder 32. it is also not the name that deposited.
[0014]
A front Subomari tapered cover 40, according to the electrode holder 32 which is constituted by the electrode support 41 provided on the cover 4 0, the discharge current airflow having flown along the peripheral surface of the adjusting unit 24, Since the flow can be guided toward the discharge electrode by the cover 40, the negative ions staying around the electrode holder 32 are forcibly fed from the outlet 12 by the flow-guided air flow, and around the electrode holder 32. Ru can effectively eliminate the ion saturation.
[0015]
According to the electrode holder 32 in which the cover 40 and the electrode support 41 are integrally formed, the number of components of the discharge unit 25 is reduced. Since it constituting an electrode holder 32 in a compact, space occupied discharge unit 25 in the body case 1 is reduced, Ru mower advantage of miniaturization and that much blower.
[0017]
When an engagement structure is provided between the insulating plate 22 and the electrode holder 32 and the discharge current adjusting unit 24 and the discharge unit 25 mounted on the heater holder 18 are fixed so as not to be separated, the discharge unit 25 is attached to the main body case 1. There is no need to provide a separate structure for fixing to the fan, and the structure of the blower can be simplified accordingly. Further, the inner edge of the insulating plate 22 supported by the both units 24, 25, Ru can be performed with positioning and shape retention of the insulating plate 22 in the main body case 1 at the same time.
[0018]
According to the blower device in which the blowout grill 13 and the ground piece 51 provided on the grip 3 are connected to be energized through the conductive path 52, the negative charge charged in the blowout grill 13 is grounded through the user's body. Since the discharge grill 13 can be maintained in an uncharged state by grounding, the negative ions supplied from the ion generator and the negative charge of the charges are repelled by the blow grill 13 to reduce the discharge amount of the negative ions. Can be resolved. Therefore, Ru can effectively deliver negative ions compared to this type of conventional blowing device.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
1 to 8 show an embodiment in which the blower according to the present invention is applied to a hair dryer. In FIG. 2, the hair dryer includes a horizontally long main body case 1, a nozzle 2 that is detachably attached to the front end thereof, and a grip 3 provided on the rear side of the lower surface of the main body case 1.
[0020]
On the front surface of the grip 3, a switch knob 4 that can be slid up and down and a push button type switching knob 5 are provided. By switching the switch knob 4, the air volume and heater temperature can be controlled and the energization state of the ion generator can be turned on / off. When the switching knob 5 is pushed in, energization to the heater is stopped and the hot air supply state can be switched to the cold air supply state. Inside the grip 3, switches 4a and 5a that are switched by the switch knob 4 and the switching knob 5 are accommodated. As shown by the imaginary line in FIG. 2, the grip 3 is connected to the main body case 1 so as to be foldable about the shaft 6.
[0021]
The main body case 1 includes a cylindrical air guide case 1A that occupies most of the main body case 1 and a fan case 1B that is press-fitted to the rear end opening of the air guide case 1A. 2 and 3, the main body case 1 contains an axial flow fan 7, a motor 8 for driving the fan, a heater 9 for overheating the air flow generated by the fan 7, and an ion generator. Has been. The air flow generated by the fan 7 is introduced from a suction grill 11 provided at the rear end of the main body case 1 and is blown out from a circular outlet 12 having a circular cross section opened at the front end of the main body case 1. The primary blown air blown out from the blower outlet 12 is flattened by the nozzle 2 and blown out together with the ambient air sucked into the nozzle to form a secondary blown air. Reference numeral 13 denotes an outlet grill that covers the outlet 12.
[0022]
In FIG. 3, the motor 8 is supported by a motor holder 15. The motor holder 15 is fitted in the air guide case 1A and fixed by the fan case 1B. Six blade pieces 17 that rectify the air flow twisted by the fan 7 are radially provided at the front end of the motor holder 15.
[0023]
The heater 9 is wound around the heater holder 18 and covered with a cylindrical insulating cover 19 and a heater cover 20 made of a metal plate. In FIG. 4, the heater holder 18 has a circular circular holding cylinder 21 that is externally fitted to the motor 8 adjacent to the front end of the motor holder 15, and a radial engagement along the circumferential surface of the holding cylinder 21 3. It consists of a single insulating plate 22. The holding cylinder 21 is formed of a plastic material excellent in heat insulation and electrical insulation, and loading grooves 21a for inserting the insulating plates 22 are formed at regular intervals at six locations around the cylinder wall.
[0024]
The insulating plate 22 is formed by forming powder mica into a plate shape, punching it into an H shape, and forming a connecting groove 22a for assembling the insulating plate 22 in a US shape on the central plate surface. The three insulating plates 22 are inserted into and engaged with the holding cylinder 21 in order, so that the peripheral space of the holding cylinder 21 can be equally divided into six. A discharge current adjusting unit 24 and a discharge unit 25, which will be described later, are arranged by using the hollowed portion 22b on the rear side of the insulating plate 22.
[0025]
By configuring the heater holder 18 with the holding cylinder 21 and the insulating plate 22, six fan-shaped air passages are defined between the holding cylinder 21 and the insulating cover 19 (see FIG. 7). The air flow to be flow-guided in the respective air passages is stabilized, and the air flow passing through the air passages is stabilized, so that air heating by the heater 9 can be performed evenly.
[0026]
In order to blow negative ions onto the hair together with the air flow generated by the fan 7, an ion generator is provided. This ion generator is composed of a discharge current adjusting unit 24 and a discharge unit 25 which are disposed adjacent to a hollow portion 22a at the center of the rear part of the heater holder 18. In FIG. 5, a discharge current adjusting unit 24 is a cylinder formed as a single unit part by enclosing an ion generating circuit constituted by a rectifying circuit 26, a pulse generating circuit 27, etc., a transformer 28, a diode 29, etc. in a resin mold. It is formed in a block shape.
[0027]
The discharge unit 25 includes a container-shaped electrode holder 32 having an open rear surface, a needle-shaped discharge electrode 33 assembled to the electrode holder 32, a ring-shaped counter electrode (ground electrode) 34 surrounding the discharge electrode 33, A dielectric cylinder 35 that insulates and cuts off between the electrodes 33 and 34 is formed. Both electrodes 33 and 34 and the transformer 28 are connected by connection leads 36 and 37.
[0028]
In FIG. 6, the electrode holder 32 is made of a plastic molded product in which a front tapered taper-shaped cover 40 and an electrode support 41 provided in the center of the cover 40 are integrally formed. The electrode support 41 has a boss protruding inward and outward of the cover 40, the dielectric cylinder 35 and the counter electrode 34 are disposed inside and outside of the boss 42 protruding on the front surface of the cover 40, and the discharge electrode 33 in the center of the boss 42. Place. A connection portion between the discharge electrode 33 and the connection lead 37 is sealed with a sealing material 43 having insulating properties. A step 44 is formed on the peripheral surface of the rear opening of the cover 40.
[0029]
As shown in FIG. 3, the rear portion of the discharge current adjustment unit 24 is fitted into the holding cylinder 21 and the opening surface of the cover 40 is adjacent to or in contact with the front end of the discharge current adjustment unit 24. By fitting the electrode holder 32 into the hollow portion 22b from the front, the stepped portion 44 is received by the engagement protrusion 45 of the insulating plate 22 (see FIG. 1), and both the discharge current adjusting unit 24 and the discharge unit 25 are It is fixed to the insulating plate 22 so that it cannot be separated. That is, the units 24 and 25 are fixed to the heater holder 18 by an engagement structure including the step portion 44 and the engagement protrusion 45.
[0030]
In the assembled state, the electrode holder 32 is within the outline of the discharge current adjusting unit 24 as shown in FIG. 7, and both the electrodes 33 and 34 and the dielectric cylinder 35 face the blow grill 13 (FIG. 1). reference). The outer surfaces of the connection leads 36 and 37 are covered with a cover 40. Therefore, the connection leads 36 and 37 do not come into contact with the air flow to generate wind noise. The cover 9 can block the radiant heat of the heater 9 to prevent the connection leads 36 and 37 from being heated. The dust carried by the airflow does not enter the cover 40 and accumulate. Both the discharge current adjusting unit 24 and the discharge unit 25 are assembled in a state where they are bonded and fixed in advance with a heat-resistant adhesive tape. In this case, the periphery of the bonded portion is sealed with the adhesive tape. It can prevent more reliably that 37 is heated. In addition, dust that enters between the discharge current adjusting unit 24 and the discharge unit 25 can be further prevented.
[0031]
The air flow that flows along the peripheral surfaces of the holding cylinder 21 and the discharge current adjusting unit 24 blows away negative ions floating around the discharge portion while flowing along the peripheral surface of the cover 40, Ion retention can be prevented. Usually, when negative ions stay in the ambient air of the electrode holder 32, the potential difference between the ambient air and the discharge electrode 33 is reduced, so that the generation of the negative ions is suppressed. Since the air flow is actively guided to the discharge electrode 33 side by the cover 40 having a constricted taper shape (a frustoconical cylinder shape), the retention of negative ions can be eliminated, so that negative ions can be generated effectively. By discharging electrons from the discharge electrode 33 toward the counter electrode 34, oxygen in the air can be negatively charged and negatively ionized, and negative ions in which minute moisture is bound to the negatively charged oxygen It can penetrate deeply. In other words, moisture can be penetrated into the hair to increase the moisture content, so that the hair is moisturized while drying the hair.
[0032]
An intake ring 46 for suppressing noise caused by the fan 7 is incorporated in the suction grill 11. The intake ring 46 integrally includes a ring-shaped tube base 47 that is engaged with the fan case 1B and a bell mouth structure air guide tube 48 that projects from the rear end of the tube base 47 in a constricted shape. A group of air inlets 49 are opened along the peripheral surface of the air guide tube 48 on the tube base 47 side. By engaging engagement claws 50 provided at several locations on the inner surface of the cylinder base portion 47 with the circumferential step portion 30 of the fan case 1B from the rear side, the intake ring 46 can be integrated with the fan case 1B. Thereafter, the entire suction ring 46 can be covered with the suction grill 11 by welding the cylindrical peripheral wall 11a of the suction grill 11 to the fan case 1B. In this assembled state, the front opening of the air guide tube 48 is located in the rear opening of the tube wall 16 of the motor holder 15, and the intake gap E is formed like a donut between the air guide tube 48 and the tube wall 16. Secured.
[0033]
Most of the air sucked in by the fan 7 is guided and accelerated by the inner wall of the air guide tube 48 having a bell mouth structure, and is sent to the front of the case while being twisted by the fan blade. Usually, in the vicinity of the tip of the fan blade, a vortex that reverses in the direction opposite to the air flow is generated. The vortex flow is caused by the fact that the front peripheral portion of the intake gap E becomes negative pressure due to the accelerating air flow guided by the inner wall of the air guide tube 48, and the air flows backward from the tip of the fan blade. In the embodiment, apart from the previous air flow (main flow path), a sub-flow path is formed between the intake port 49 and the intake gap E, and the air sucked from the intake port 49 passes through the sub-flow path. Therefore, it is possible to flow into the front peripheral portion of the intake gap E, so that the generation of a vortex between the fan blade tip portion and the intake gap E can be effectively suppressed. As a result, fan noise caused by eddy currents can be suppressed. Since the entire intake ring 46 is covered with the suction grill 11 and the intake port 49 is opened in the inner space of the suction grill 11, it is possible to well prevent the hair from being sucked into the intake gap E. Of course, the invasion of hair is also prevented in the main flow path formed on the inner wall of the air guide tube 48. Since the air intake port 49 is opened in the air guide tube 48 close to the air intake gap E, the air sucked from the air intake port 49 can flow without resistance along the outer wall of the air guide tube 48, and the intake efficiency correspondingly. Is good. Since the air flow in the auxiliary flow path that flows through the outer wall of the air guide tube 48 and the intake gap E is generated by the venturi action of the accelerated air flow that flows through the main flow path, the flow velocity of the air flow in the auxiliary flow path is the air flow in the main flow path. Slightly slower than the flow velocity.
[0034]
When negative ions come into contact with the surface of the blowing grill 13 and are negatively charged, the charged negative charges and negative ions repel each other, and the amount of negative ions released decreases. In order to eliminate the ion saturation accompanying the charging of the negative charge, the negative charge charged to the blow grill 13 is grounded through the user's body so that the amount of negative ions supplied can be increased.
[0035]
Specifically, as shown in FIG. 2, a grounding piece 51 having conductivity is provided on the outer surface of the grip 3, and the blowing grill 13 and the grounding piece 51 are conducted through a conductive path 52, and the blowing grille 13 is charged negatively. The electric charge is grounded to the human body through the ground piece 51. Negative charges charged on the human body can be released through the floor or walls. The blow-out grill 13 is made of a press-molded product obtained by punching and forming a metal plate material, and a ring-shaped ion emission port 53 is provided at the center thereof. The ion emission port 53 is made of a plastic molded product and also serves as a protective frame for the discharge electrode 33.
[0036]
The ground piece 51 is made of a leaf-shaped plastic molded product having a long top and bottom, and a plating layer is formed on the entire surface to provide conductivity. As shown in FIG. 1, the ground piece 51 and the blowout grill 13 are electrically connected via a heater cover 20 that contacts the blowout grill 13 and a lead wire 54 (see FIG. 3) that connects the heater cover 20 and the ground piece 51. Connect to. That is, the previous conductive path 52 is constituted by the heater cover 20 and the lead wire 54. In this way, when the blower grill 13 is connected to the ground piece 51 using the heater cover 20, it is not necessary to wire the lead wire 54 in the air guide case 1A, and the winding length is shortened. It is possible to save the labor of assembling.
[0037]
In FIG. 2, the nozzle 2 is composed of a connecting cylinder 57 that is fitted into the air outlet 12 and a nozzle main body 58 that is externally fixed to the connecting cylinder 57. The nozzle body 58 is formed in a tapered shape from the inlet side to the outlet side of the nozzle 2, and the front cross section thereof has a vertically long oval shape. An air introduction port 60 for taking in ambient air is opened on the peripheral surfaces near the exit of the upper and lower curved walls. The connecting cylinder 57 is provided with an inner cylinder 59 having an elliptical cross section at the front and rear, and the rear end opening faces the ion emission port 53 of the blowing grill 13.
[0038]
In order to prevent negative ions from adhering to the inner cylinder 59 and the ion discharge port 53, a water-repellent resin film can be formed on the inner surface of the inner cylinder 59 and the entire surface of the ion discharge port 53. For example, a water-repellent resin film is formed by coating a fluorine-based resin or a silicon-based resin typified by Teflon (registered trademark). When the inner cylinder 59 is provided as described above, an air flow containing a large amount of negative ions can be flow-guided by the inner cylinder 59 and the outside thereof can be wrapped with an air flow, so that the secondary ions blown out from the nozzle 2 are subjected to negative ions. Can be prevented and the amount of negative ions reaching the hair can be increased.
[0039]
FIG. 9 shows another embodiment of the blower. There, it differs from the previous embodiment in that the main body case 1 is supported by a stand 65 and used in a state where the blower is placed. The stand 65 is provided with a switch knob 66. By switching the switch knob 66, the air volume and heater temperature can be controlled and the energization state of the ion generator can be turned on / off. The main body case 1 can be displaced up and down around the axis 67 with respect to the stand 65. Since others are the same as the above-mentioned embodiment, the same numerals are given to the same member and the explanation is omitted.
[0040]
Other than the above embodiment, the discharge current adjusting unit 24 does not need to have a circular cross section, and the cross sectional shape may be a polygonal shape such as a quadrangle or a hexagon. In that case, the shape of the cover 40 of the electrode holder 32 is similarly formed in a polygonal shape so that the contour lines of the two coincide with each other, or the contour line of the cover 40 falls within the contour line of the discharge current adjustment unit 24. It is good to. The cover 40 and the electrode support 41 of the electrode holder 32 can be formed as separate parts. The cover 40 does not necessarily have a tapered shape, and may be deformed into a bowl shape or a cylindrical shape.
[0041]
The electrode holder 32 can be fixed by the blowing grill 13 or a holding frame attached to the main body case 1. If necessary, a configuration in which the electrode holder 32 is engaged and attached to the discharge current adjusting unit 24 and integrated, and the discharge current adjusting unit 24 is fixed to the heater holder 18 can be adopted.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing a discharge unit of an ion generator.
FIG. 2 is a longitudinal side view of a hair dryer.
FIG. 3 is a longitudinal side view of a main body case.
FIG. 4 is an exploded perspective view of a heater holder.
FIG. 5 is an explanatory diagram showing a schematic configuration of an ion generator.
FIG. 6 is an exploded perspective view of the discharge unit.
7 is a cross-sectional view taken along line AA in FIG.
FIG. 8 is a sectional view showing a detailed structure of an intake ring.
FIG. 9 is a schematic sectional view showing another embodiment of the blower.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body case 3 Grip 7 Fan 8 Motor 9 Heater 13 Blowing grill 18 Heater holder 21 Holding cylinder 22 Insulating plate 24 Discharge current adjustment unit 25 Discharge unit 32 Electrode holder 33 Discharge electrode 34 Counter electrode 36/37 Connection lead 40 Cover 41 Electrode support Body 51 Ground piece 52 Conductive path 53 Ion outlet

Claims (2)

In the main body case (1), a fan (7), a fan driving motor (8), an air heating heater (9), and an ion generator are provided.
A discharge current adjusting unit (24) disposed in the central portion of the heater holder (18), and an ion generating device (24) disposed adjacent to the discharge current adjusting unit (24) and facing the blow grill (13) 25)
The discharge unit (25) includes a container-shaped electrode holder (32) whose rear surface is open, a discharge electrode (33) assembled to the electrode holder (32), and a counter electrode (34).
The outer surface of the connection leads (36, 37) connecting the discharge current adjusting unit (24) and the discharge unit (25) is covered with the electrode holder (32) ,
An electrode holder (32) includes a front tapered taper-shaped cover (40) and an electrode support (41) provided on the cover (40) for supporting the discharge electrode (33) and the counter electrode (34). With
The outer surface of the connection leads (36, 37) connecting the discharge current adjusting unit (24) and the discharge unit (25) is covered with a cover (40),
The cover (40) of the electrode holder (32) and the electrode support (41) are integrally formed,
The heater holder (18) includes an insulating plate (22),
The discharge current adjusting unit (24) and the discharge unit (25) attached to the heater holder (18) are provided with an engaging protrusion (45) formed on the insulating plate (22) and a cover (40) of the electrode holder (32). An air blower characterized by being fixed by an engagement structure comprising a step portion (44) formed on the peripheral surface of the opening . An ion emission port (53) is provided at the center of the blowout grill (13) facing the discharge unit (25),
And outlet grille (13), the ground piece provided in the grip (3) and (51) but conductive path (52) blower conductively connected tare Ru claim 1, wherein through.

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