WO2019155574A1 - Dryer - Google Patents

Abstract

This dryer, which dries hair etc. by using radiation heat rays, exhausts heat from inside a reflector without reducing the reflection efficiency of the reflector. An inlet flow path (70) is formed only on the rear end part of a reflector (10), and an outlet flow path (71) is formed only on the front end part of the reflector. This allows the reflection area of the reflector to be made larger as compared to a configuration in which a large number of inlet flow paths and outlet flow paths are formed across the entire reflector, and thus enables an improvement in reflection efficiency. Furthermore, the flow path internal pressure of a dry air flow path (52) in a forming region of the outlet flow path of the reflector positioned on the downstream side is set to be less than the flow path internal pressure of the dry air flow path (52) in the forming region of the inlet flow path of the reflector positioned on the upstream side. The foregoing configuration makes it possible to utilize the Venturi effect so as to create a flow of air that goes through the inside of the reflector from the intake flow path and reaches the dry air flow path via the outlet flow path, thereby allowing heat inside the reflector to be efficiently discharged.

Description

Hairdryer

The present invention relates to a dryer for drying hair and the like using radiant heat rays such as infrared rays.

In the field of dryers, it is known to use a hot-wired light source such as a halogen lamp as a heat source for heating dry air. It is also known to provide a condensing reflector around the light source in a dryer using a heat ray light source as a heat source. The dryer described in Patent Document 1 is provided with an air blower unit 8, an air heater 10, a halogen lamp 22, and a reflector 20 in order from the downstream side inside a housing 2 having a handle 6. The reflector 20 includes a concave reflecting portion having a front opening and a cylindrical lamp mounting portion integrally provided continuously at the center thereof, and light emitted from a halogen lamp 22 fixed to the lamp mounting portion. Is directed forward by the concave reflecting portion. A translucent cover plate 24 is attached to the front opening of the reflector 20.

FIG. 3 of Patent Document 1 discloses a dryer in which a large number of flow paths 321 are opened in the concave portion of the reflector 320 and a large number of flow paths 325 are opened in the cover plate 324. The flow path 321 is provided on the entire surface of the reflector 320 from the proximal end near the rear to the front end near the front. The flow path 325 is opened on the entire surface of the cover plate 324. In this way, when a large number of flow paths 321 and 325 are provided in each of the reflector 320 and the cover plate 324, the air that passes from the downstream flow path 321 to the front through the flow path 325 through the reflector 320. Since a flow can be formed, the air in the reflector 320 can be discharged.

Forming the flow path in the reflector is also disclosed in the dryer of Patent Document 2. The reflector 13 (reflector) of the dryer described in Patent Document 2 includes a concave first reflective portion 131 and a cylindrical second reflective portion 132, and the second reflective portion 132 has a reflective surface. A large number of through-holes 133 are provided to allow air to flow in or out between the inside and the outside of the body 13. The first reflecting portion 131 is provided with an opening s, and the heat ray light source 11 is assembled in the opening s. In front of the reflector 13, a filter 15 that transmits only heat-ray infrared rays in the light emitted from the heat-ray light source 11 is disposed. Due to the rotation of the fan 19, the air sent into the reflector 13 from the opening s of the first reflector 131 flows out of the reflector 13 through the through-hole 133 of the second reflector 132. Together with the air flowing through the ventilation space between the outer periphery of the housing and the housing 17, the air is discharged from the nozzle 173.

German Patent Application Publication No. 295001 International Publication No. 2016/072031

The present inventors are engaged in the development of a dryer that can irradiate hair with stronger infrared rays. That is, in a dryer using a heat ray light source such as a halogen lamp, the air blown by the fan is heated by the heat ray light source, and the hair is dried by the heated hot air, and the heat ray light source is irradiated. Two drying methods of radiant heating method, in which hair is dried by heating with radiant heat rays such as infrared rays, have been adopted by the present inventors in order to improve the drying ability by the latter radiant heating method. He is involved in the development of dryers that can irradiate hair with strong infrared rays.

However, as in Patent Documents 1 and 2, in the configuration in which a large number of through holes are formed in the reflector, the reflection area of the reflector is reduced by the amount of the through holes provided, and the reflection efficiency of infrared rays, which are radiant heat rays, is reduced. Therefore, the hair cannot be efficiently irradiated with infrared rays, and the drying power of the dryer derived from the radiant heating method cannot be improved. The above problem can be solved, for example, by reducing the number of through holes provided in the reflector. However, in that case, the exhaust efficiency of the internal air of the reflector is lowered, the internal temperature of the reflector is raised, the deformation of the reflector, the filter There is a risk of incurring defects such as damage.

The present invention has been made in order to solve the problems of the conventional dryer using infrared rays as described above. A dryer capable of reliably exhausting heat from the reflector without reducing the reflection efficiency of the reflector is provided. The purpose is to provide.

The dryer according to the present invention is provided in the main body case 1 having a hollow cylindrical air guide portion 7 extending from the rear suction port 8 to the front air outlet 9, and the air guide portion 7. A fan 3 for generating an air flow from the air outlet 9 toward the air outlet 9, a heat-line light source 4 that is disposed on the front side of the fan 3 in the air guide 7 and emits radiant heat rays including infrared rays, and an air guide 7 is disposed on the front side of the heat ray light source 4 in the reflector 7 and reflects and guides the radiant heat ray emitted from the heat ray light source 4 toward the front, and is disposed on the front side of the reflector 10 in the air guide unit 7. Thus, the dry air flow path 52 formed between the outer periphery of the reflector 10 and the inner surface of the main body case 1 through the optical filter 11 that transmits radiant heat rays among the light emitted from the front end of the reflector 10 and attenuates visible light. And the heat inside the reflector 10 is discharged to the outside. And a waste heat structure because. The exhaust heat structure is formed only at the rear end portion of the reflector 10, and is formed only at the suction flow path 70 that receives a part of the air flow generated by the blower fan 3 into the reflector 10 and the front end portion of the reflector 10. Thus, it is configured with a delivery channel 71 that sends out the air in the reflector 10 toward the drying air channel 52. Then, the pressure in the flow path of the dry air flow path 52 in the formation area of the delivery flow path 71 is configured to be smaller than the pressure in the flow path of the dry air flow path 52 in the formation area of the suction flow path 70. Features.

The length of the reflector 10 in the front-rear direction defined by the rear end of the optical filter 11 and the rear end of the reflector 10 is defined as d1, and the rear end of the optical filter 11 and the opening edge on the rear end side of the delivery flow path 71 are defined. When the distance defined by is defined as d2, the delivery channel 71 is formed at a position satisfying the relational expression of d2 ≦ d1 / 5.

The opening length w1 of the delivery channel 71 in the front-rear direction is set to 5 mm or less.

It is possible to adopt a configuration in which a gap E serving as a delivery channel 71 is formed between the rear end of the optical filter 11 and the front end of the reflector 10.

The reflector 10 is composed of a front reflector 80 on the front side and a rear reflector 81 on the rear side, and a gap E serving as a delivery flow path 71 is formed between the front and rear reflectors 80 and 81. Can be taken.

The delivery flow path 71 can be a circular slit opening 84 that is opened over the entire circumference of the peripheral wall constituting the reflector 10 so as to be along the front opening edge of the reflector 10.

The delivery flow path 71 can be constituted by a group of a large number of through holes 86 arranged along the entire circumference of the peripheral wall constituting the reflector 10 along the front opening edge of the reflector 10.

When the blower fan 3 is rotated, dry air flows into the air guide portion 7 of the main body case 1 from the suction port 8 so as to reach the air outlet 9 through the dry air flow path 52. At this time, in the dryer of the present invention, the flow rate of the delivery flow path 71 of the reflector 10 located downstream is higher than the pressure in the flow path of the drying air flow path 52 in the formation region of the suction flow path 70 of the reflector 10 located upstream. Since the internal pressure of the drying air channel 52 in the formation region is set to be small, the flow rate of the drying air in the formation region of the delivery channel 71 is increased more than the flow rate of the drying air in the formation region of the suction channel 70. Can be made. When the flow velocity of the drying air in the region where the delivery channel 71 is formed in this way is increased, the internal air of the reflector 10 is sucked into the drying air channel 52 via the delivery channel 71 due to the venturi effect. It can be reliably sent out toward the drying air flow path 52 (see FIG. 6). In addition, when the internal air of the reflector 10 is sent out, the pressure difference between the pressure in the reflector 10 and the pressure in the flow path of the dry air flow path 52 in the formation area of the suction flow path 70 passes through the suction flow path 70. Dry air sucked from the suction port 8 of the main body case 1 is sucked into the reflector 10 from the dry air flow path 52 (see FIG. 6). As described above, according to the present invention, the venturi effect can be used to create an air flow from the suction flow path 70 through the inside of the reflector 10 to the dry air flow path 52 via the delivery flow path 71. Even when the air in the reflector 10 is heated by the heat ray light source 4, the air is sent out to the outside of the reflector 10, and new air is sent into the reflector 10 to efficiently transfer the heat in the reflector 10. It is possible to prevent the inside of the reflector 10 from falling into an overheated state. As described above, according to the present invention, it is possible to surely prevent the reflector 10 from being deformed or the optical filter 11 from being damaged by heating with the heat ray light source 4, so that a dryer having excellent durability can be obtained. it can.

Since the suction flow path 70 is formed only at the rear end portion of the reflector 10 and the delivery flow path 71 is formed only at the front end portion of the reflector 10, a large number of suction flow paths and delivery flow paths are formed throughout the reflector 10. The reflection area of the reflector 10 can be increased as compared with the conventional configuration to be formed, and the reflection efficiency and the light collection efficiency of the reflector 10 can be improved. Therefore, according to the dryer according to the present invention, it is possible to irradiate hair or the like with stronger radiant heat rays such as infrared rays, and thus it is possible to obtain a dryer excellent in drying ability by the radiant heating method.

As described above, according to the dryer of the present invention, the conflicting problems of the reflection efficiency improvement of the reflector 10 and the reliable exhaust heat of the reflector 10 can be solved simultaneously. In addition, since the temperature of the drying air can be increased by mixing the air sent out from the sending flow channel 71 with the drying air flowing through the drying air flow channel 52, the drying ability not only by the radiant heating method but also by the convection heating method. Can be improved, and hair can be heated and dried more effectively in a shorter time.

The length of the reflector 10 in the front-rear direction defined by the rear end of the optical filter 11 and the rear end of the reflector 10 is defined as d1, and the rear edge of the optical filter 11 and the opening edge on the rear end side of the delivery channel 71 are defined. When the distance defined by is defined as d2, it is desirable to form the delivery flow path 71 at a position satisfying the relational expression d2 ≦ d1 / 5. That is, the “front end portion of the reflector 10” in which the delivery channel 71 in the present invention is formed means that the opening edge on the rear end side of the delivery channel 71 starts from the rear end of the optical filter 11. The position is within one-fifth of the direction length. This is because if the delivery flow path 71 is arranged on the rear side of the front / rear direction of the reflector 10, air stays on the front end side of the reflector 10, and exhaust heat due to the airflow is not performed. If there is a possibility that a dead space may occur, and the delivery flow path 71 is disposed on the rear side, the distance between the heat linear light source 4 and the delivery flow path 71 becomes short, and the radiant heat rays emitted from the heat linear light source 4 It leaks out of the reflector 10 directly via the delivery flow path 71, and is based on the reflection efficiency and condensing rate by the reflector 10 falling (refer FIG. 7B). On the other hand, when the delivery flow path 71 is arranged on the front side of the reflector 10 in the front-rear direction, the possibility that air will stay in the reflector 10 is small, and the heat in the reflector 10 is efficiently used. Can be discharged. Since the distance between the heat linear light source 4 and the delivery flow path 71 can be increased, it is possible to reduce the radiant heat rays emitted from the heat linear light source 4 from leaking directly from the reflector 10 via the delivery flow path 71. Thus, it is possible to improve the reflection efficiency and the light collection rate by the reflector 10 (see FIG. 7A). According to the knowledge of the present inventors, in order to improve the exhaust heat efficiency and the reflection efficiency of the reflector 10, the delivery channel is formed at a position satisfying the relational expression d2 ≦ d1 / 10. It is more desirable that the opening edge on the rear end side of the delivery channel 71 is within one tenth of the length of the reflector 10 in the front-rear direction, starting from the rear end of the optical filter 11.

It is desirable to set the opening length dimension w1 of the delivery channel 71 in the front-rear direction to 5 mm or less. This is because when the opening length dimension w1 of the delivery flow path 71 exceeds 5 mm, the opening becomes too large, so that the venturi effect is not satisfactorily exhibited, and the dry air flow path from the inside of the reflector 10 via the delivery flow path 71 This is because the amount of air sent to 52 is reduced, and the reflection efficiency and the light collection rate by the reflector 10 are reduced.

As a specific form of the delivery channel 71, a gap E serving as the delivery channel 71 is formed between the rear end of the optical filter 11 and the front end of the reflector 10 (see FIG. 2). A front reflector 80 on the front side and a rear reflector 81 on the rear side, and a gap E serving as a delivery channel 71 is formed between the front and rear reflectors 80 and 81 (see FIG. 8). ), And the delivery flow path 71 is formed as a circular slit opening 84 which is opened over the entire circumference of the peripheral wall constituting the reflector 10 so as to be along the front opening edge of the reflector 10 (FIG. 10). Reference), the delivery flow path 71 is composed of a group of a large number of through-holes 86 arranged along the entire circumference of the peripheral wall constituting the reflector 10 so as to be along the front opening edge of the reflector 10. thing( 12 reference), and the like. As described above, it is desirable that the delivery flow path 71 is formed in the entire circumference along the opening edge of the reflector 10 only at one location of the front end portion of the reflector 10. Among these, when the gap E serving as the delivery channel 71 is formed between the rear end of the optical filter 11 and the front end of the reflector 10, the reflector 10 is divided into two parts, or a through hole is provided in the reflector 10. Therefore, it is possible to suppress an increase in the cost of the dryer provided with the delivery channel 71. Further, when the delivery flow path 71 is formed as a circular slit opening 84 or when it is configured by a group of a large number of through holes 86, a gap is formed between the rear end of the optical filter 11 and the front end of the reflector 10. Compared with the case where E is formed, the length dimension before and after the reflector 10 defined from the front end of the optical filter 11 to the rear end of the reflector 10 can be reduced by the amount that the gap E is eliminated. Can contribute to compactness.

It is a vertical side view of the dryer (hair dryer) which concerns on Example 1 of this invention. FIG. 2 is a cross-sectional view (transverse plan view) taken along line AA in FIG. 1. 3 is an enlarged cross-sectional view showing a delivery channel of a hair dryer according to Example 1. FIG. FIG. 3 is a cross-sectional view (vertical front view) taken along line BB in FIG. 2. It is a perspective view for demonstrating the assembly | attachment structure of the halogen lamp with respect to the reflector of the hair dryer which concerns on Example 1. FIG. It is a figure for demonstrating the flow of the air by the venturi effect in the dryer of this invention. It is a conceptual diagram for demonstrating the relationship between the position of a delivery flow path, and the leakage amount of the radiant heat ray from a reflector, and has shown the case where a delivery flow path is located ahead of a reflector. It is a conceptual diagram for demonstrating the relationship between the position of a delivery flow path, and the leakage amount of the radiant heat ray from a reflector, and has shown the case where a delivery flow path is located near the back of a reflector. It is a cross-sectional top view of the principal part of the hair dryer which concerns on Example 2 of this invention. It is a perspective view of the reflector which comprises the hair dryer which concerns on Example 2. FIG. It is a cross-sectional top view of the principal part of the hair dryer which concerns on Example 3 of this invention. It is a perspective view of the reflector which comprises the hair dryer which concerns on Example 3. FIG. It is a cross-sectional top view of the principal part of the hair dryer which concerns on Example 4 of this invention. It is a perspective view of the reflector which comprises the hair dryer which concerns on Example 4. FIG. It is a cross-sectional top view of the principal part of the hair dryer which concerns on Example 5 of this invention.

(Example 1)
1 to 7 show Example 1 in which the dryer of the present invention is applied to a hair dryer. In the present embodiment, front / rear, left / right, and upper / lower follow the cross arrows shown in FIGS. 1, 2, and 5 and the front / rear, left / right, and upper / lower indications shown near each arrow. In FIG. 1, a hair dryer includes an axial flow type fan 3 that is rotated by a fan motor 2 in a body case 1 that is long before and after serving as a grip, and a heat-ray source that emits infrared light and visible light. And a halogen lamp (thermal linear light source) 4 and the like. The main body case 1 is formed by joining a pair of upper and lower halves 5 and 6 formed in a bowl shape, and a cylindrical air guide portion 7 is formed therein. An air inlet 8 is formed at the rear end of the air guide portion 7, and an air outlet 9 is formed at the front end.

The blower fan 3 is disposed in the latter half of the air guide 7 in the main body case 1, pressurizes the air sucked from the suction port 8 and feeds it toward the blower outlet 9. The halogen lamp 4 is disposed in the front half of the air guide 7 of the main body case 1, and a reflector 10 that reflects and guides light emitted from the halogen lamp 4 toward the outlet 9 is fixed around the halogen lamp 4. ing. An optical filter 11 is disposed in the light emission path between the reflector 10 and the outlet 9. The air outlet 9 serves as an air outlet for irradiating the user's hair with infrared air (heat rays) radiated from the halogen lamp 4 and a dry air outlet.

Most of the peripheral surface of the main body case 1 is covered with a touch sensor 12 that detects contact with a human body, and an operation knob 15 of a power switch 14 is arranged facing an operation unit formed on the upper part of the touch sensor 12. ing. When the operation knob 15 is slid back and forth along the surface of the main body case 1, the power switch 14 can be switched between an on state and an off state. The power switch 14 is housed in a housing recess 17 formed in the upper portion of the main body case 1, and the driving recess 18 formed in the lower portion of the main body case 1 controls the driving state of the fan motor 2 and the halogen lamp 4. A control board 19 is accommodated.

A suction grill 22 is attached to the suction port 8 of the main body case 1, and a socket 25 for detachably connecting a power supply plug 24 is provided at the center of the suction grill 22. A blowout grill 23 made of a metal material such as aluminum is attached to the blowout opening 9 of the main body case 1. The blow-out grill 23 is integrally provided with a cylindrical outer cylinder body 26, an inner cylinder body 27 having a smaller diameter than the outer cylinder body 26, and a plurality of rectifying blades 28 that radially connect both cylinder bodies 26 and 27. Yes.

The fan motor 2 and the blower fan 3 are supported by a fan case 29. The fan case 29 includes a cylindrical outer cylinder 30 that surrounds the blower fan 3, a holder portion 31 to which the rear end portion of the fan motor 2 is attached, and a cylindrical inner cylinder that surrounds the holder portion 31. 32 and a plurality of rectifying blades 33 that radially connect the outer cylindrical body 30 and the inner cylindrical body 32 are integrally provided. A flange 34 projects outwardly from the front end of the outer cylindrical body 30, and the fan case 29 is formed by engaging and holding the flange 34 with an engagement groove 35 formed on the inner surface of the halves 5 and 6. It is fixed to the main body case 1.

2 and 5, the halogen lamp 4 is configured by connecting a front side bulb 38 and a rear side socket 39 in the front-rear direction. The bulb 38 is composed of a quartz glass globe 40 formed in the shape of a hollow container and a power supply plug 41 formed behind the globe 40, and inside the globe 40, in addition to a filament that serves as a light emitter. An inert gas, a halogen gas, or the like is enclosed. The globe 40 integrally includes a spherical shell-shaped globe body 42, an exhaust pipe remaining portion 43 formed at the front end of the globe body 42, and a holder portion 44 formed at the rear of the globe body 42. The plug 41 is attached to the part. The holder portion 44 is formed in a hemispherical shell shape that expands toward the front, and its outer dimension is set smaller than the outer dimension of the globe body 42. The plug 41 is formed in a flat prismatic shape with small left and right thickness dimensions. The socket 39 includes a connector 46 having a socket hole 45 formed of a vertically long opening that receives the plug 41, and a housing 47 provided at the rear of the connector 46. The front end surface of the connector 46 is formed in a concave curved shape that substantially matches the outer shape of the holder portion 44 of the valve 38. When the plug 41 of the valve 38 is inserted into the socket hole 45, the convex arc surface of the holder portion 44 is formed. Is received by the front end surface of the connector 46.

A light collecting reflector 10 is disposed around the bulb 38. The reflector 10 is made of a metal such as aluminum and is formed in a round bottom cylindrical shape that opens toward the air outlet 9, and a reflection surface that reflects infrared light and visible light is formed on the inner surface thereof. . In FIG. 2, reference numeral 50 is formed at the rear end of the reflector 10, and a hemispherical conical portion that expands forward, and reference numeral 51 continuously extends forward from the front end edge of the conical portion. A straight straight cylindrical portion having a uniform diameter is shown. The outer diameter dimension of the reflector 10 is set to be smaller than the inner diameter dimension of the main body case 1, and a dry air flow path 52 leading to the air outlet 9 is formed between the outer periphery of the reflector 10 and the inner surface of the main body case 1. ing. Most of the air sucked into the air guide portion 7 from the suction port 8 by the blower fan 3 flows into the dry air flow path 52 along the conical portion 50 of the reflector 10, and then is sent out from the air outlet 9.

An insertion hole 53 for allowing the valve 38 to face the inside of the reflector 10 is formed at the center of the rear portion of the reflector 10, that is, at the protruding end of the conical portion 50. As shown in FIGS. 4 and 5, the insertion hole 53 has a round hole-shaped first insertion hole 54 formed at the center of the protruding end of the conical portion 50 and a vertical direction so as to penetrate the first insertion hole 54. A long hole-shaped second insertion hole 55 is formed in a keyhole shape in a front view. After the connector 46 of the socket 39 faces the periphery of the insertion hole 53, the holder portion 44 of the valve 38 and the plug 41 are inserted into the insertion hole 53, and the plug 41 is inserted into the socket hole 45 of the connector 46. As a result, the front valve 38 and the rear socket 39 can be connected via the insertion hole 53 of the reflector 10. At this time, a slight gap is formed between the outer peripheral surface of the holder portion 44 and the inner peripheral surface of the first insertion hole 54 and between the connector 46 of the socket 39 and the inner peripheral surface of the second insertion hole 55. Is done. This gap becomes a suction flow path 70 having an exhaust heat structure to be described later.

Inside the air guide portion 7, a support frame 57 that rectifies the wind generated by the blower fan 3 and supports the reflector 10, the halogen lamp 4, and the like is disposed. The support frame 57 is configured by a pair of mica plates 58 and 58 arranged in a horizontal posture and a vertical posture in a cross shape. The rear end portions of the mica plates 58 and 58 are engaged with a slit 59 formed at the front end portion of the fan case 29, thereby restricting the rotation of the support frame 57 relative to the main body case 1. As shown in FIGS. 1 to 4, a pair of ribs 61 and 61 having engagement recesses 60 are formed to project outward at four locations on the upper, lower, left and right of the outer peripheral surface of the front edge (opening periphery) of the reflector 10. The reflector 10 is supported from four directions (up, down, left, and right) by engaging the mica plates 58 and 58 with these engaging recesses 60. As shown in FIG. 5, engagement grooves 62 are formed on the upper and lower surfaces of the socket 39 of the halogen lamp 4, and by engaging a mica plate 58 with these engagement grooves 62, the socket 39 is viewed from above and below. It is supported. A shallow mounting groove 63 is formed in a circular shape on the inner surface of the front end portion of the main body case 1, and the outer cylindrical body 26 of the blowing grill 23 is fitted into the mounting groove 63, whereby the main body of the blowing grill 23. The forward / backward direction (axial direction) and radial direction movement relative to the case 1 are restricted.

The optical filter 11 is disposed in the light radiation path between the reflector 10 and the outlet 9 for the purpose of transmitting visible light and blocking visible light. By arranging the optical filter 11 in the light emission path in this way, it is possible to prevent visible light from being irradiated from the air outlet 9 of the dryer when using the hair dryer, and it is dazzling to the user's eyes when the hair is dried. Can eliminate the light. Thereby, the user can smoothly perform hairdressing work without feeling dazzling. The optical filter 11 is a disk-shaped glass body made of a low-expansion glass such as black crystallized glass having a small thermal expansion coefficient, and is attached to the inner cylinder body 27 in an inner fitting shape.

In a hair dryer provided with a halogen lamp 4 that is a heat ray light source, the reflector 10 is heated by infrared rays emitted from the halogen lamp 4. Further, the heat generated from the halogen lamp 4 is accumulated inside the reflector 10, and the temperature inside the reflector 10 rises. For this reason, an exhaust heat structure for exhausting the heat inside the reflector 10 is required. The exhaust heat structure of the hair dryer according to the present embodiment is formed only at the rear end portion of the reflector 10, and receives a part of the air flow generated by the blower fan 3 into the reflector 10. It is formed only at the front end portion of the reflector 10, and is composed of a delivery flow channel 71 that sends out the air in the reflector 10 toward the dry air flow channel 52.

More specifically, as shown in FIG. 2, a slight gap is formed between the bulb 38 constituting the halogen lamp 4 and the insertion hole 53 formed at the rear end of the reflector 10. The suction flow path 70 is configured to receive a part of the air flow generated by the fan 3 into the reflector 10. On the other hand, the rear end of the optical filter 11 and the front end of the reflector 10 are not in contact with each other, and both are disposed close to each other with a slight gap E (2 mm (w1 = 2 mm) in this embodiment). E is a delivery flow path 71 for sending the air in the reflector 10 toward the drying air flow path 52. The flow passage cross-sectional area of the dry air flow passage 52 (hereinafter referred to as “downstream flow passage 72”) at the front end portion of the reflector 10 obtained by the difference between the inner diameter dimension of the main body case 1 and the outer diameter dimension of the straight cylinder portion 51 is: It is set to be smaller than the cross-sectional area of the dry air flow path 52 (hereinafter referred to as “upstream flow path 73”) at the rear end of the reflector 10, in other words, the downstream side in the region where the delivery flow path 71 is formed. The flow path cross-sectional area of the flow path 72 is set smaller than the flow path cross-sectional area of the upstream flow path 73 in the formation region of the suction flow path 70. For this reason, the pressure in the flow path of the downstream flow path 72 is made smaller than the pressure in the flow path of the upstream flow path 73, and the flow velocity of the drying air flowing in the downstream flow path 72 is made to flow in the upstream flow path 73. It is possible to increase the flow rate of the drying air.

As shown in the conceptual diagram of FIG. 6, when the flow velocity of the drying air in the downstream flow path 72 is increased as described above, the internal air of the reflector 10 is sent via the delivery flow path 71 to the drying air flow path 52 due to the venturi effect. Can be inhaled. Therefore, the internal air of the reflector 10 can be reliably sent out toward the drying air flow path 52 (downstream flow path 72), and the heat in the reflector 10 can be discharged. In addition, when the internal air of the reflector 10 is sent through the delivery flow path 71 in this way, the suction flow path 70 is caused by a pressure difference between the pressure in the reflector 10 and the pressure in the flow path of the upstream flow path 73. Thus, the drying air can be sucked into the reflector 10 from the drying air channel (upstream channel 73).

Thus, according to the hair dryer according to the present embodiment, the flow of air from the suction flow path 70 through the inside of the reflector 10 to the dry air flow path 52 through the delivery flow path 71 using the Venturi effect. (See FIG. 6), even when the air in the reflector 10 is heated by heat radiation from the halogen lamp 4, the air is sent out to the outside of the reflector 10 through the delivery channel 71. The fresh air can be sent into the reflector 10 through the suction flow path 70 to be exhausted. As mentioned above, according to the hair dryer which concerns on a present Example, the inside of the reflector 10 can be efficiently exhausted and it can prevent reliably that the inside of the reflector 10 falls into an overheated state.

As described above, in the hair dryer according to the first embodiment, the gap E is formed between the rear end of the optical filter 11 and the front end of the reflector 10, and this gap E is used as the delivery flow path 71. A delivery channel 71 for delivering internal air is formed at the foremost end. Therefore, according to the hair dryer according to the first embodiment, the dead space in which air stays is not formed in the reflector 10, and the air in the reflector 10 can be exhausted uniformly. Can be reliably and efficiently discharged to the drying air passage 52 via the delivery passage 71. In addition, when the heat in the reflector 10 can be efficiently discharged to the dry air flow path 52 in this way, the temperature of the dry air flowing through the dry air flow path 52 is increased and blown out from the outlet 9 toward the front. As the drying air can be efficiently heated, not only the drying ability of the radiation heating method derived from infrared rays, but also the improvement of the drying ability by the convection heating method derived from heating drying air can be achieved. Can be effectively performed in a shorter time. However, in hair dryers that have drastically improved the drying ability derived from the radiant heating method, the drying ability derived from the convection heating method may be ancillary, in which case the hair and skin are dried. It suffices if the dry wind is warmed to such an extent that it does not cause coldness or discomfort when the wind hits it.

In addition, when the delivery channel 71 is formed at the forefront of the reflector 10 as shown in FIG. 7A, the halogen lamp 4 is compared to the case where the delivery channel 71 is formed near the rear part of the reflector 10 as shown in FIG. 7B. (More specifically, the center point of the globe 40 of the halogen lamp 4) and the direction defined by the delivery flow path 71 can be brought closer to the front and rear horizontal directions, so that the infrared rays emitted from the halogen lamp 4 are sent to the delivery flow path. It can be made difficult to leak out of the reflector 10 via 71. Therefore, it is possible to reliably prevent the reflection efficiency and the light collection rate of the reflector 10 from being reduced due to the formation of the delivery channel 71.

From the above knowledge, the length of the reflector 10 in the front-rear direction defined by the rear edge of the optical filter 11 and the rear edge of the reflector 10 is defined as d1, and the rear edge of the optical filter 11 and the delivery flow When the distance defined by the opening edge on the rear end side of the path 71 is defined as d2, it is desirable to form the delivery channel 71 at a position satisfying the relational expression d2 ≦ d1 / 5 (see FIG. 2). That is, from the viewpoint of improving the exhaust heat efficiency and the reflection efficiency, it is optimal to form the delivery channel 71 at the foremost end of the reflector 10 as in this embodiment, but in Examples 2 to 4 described later, As shown, when the delivery flow path 71 is formed at the front end of the reflector 10, it is desirable to form the delivery flow path 71 at a position satisfying the relational expression d2 ≦ d1 / 5. This is because if the delivery flow path 71 is arranged on the rear side of the front / rear direction of the reflector 10, air stays on the front end side of the reflector 10, and exhaust heat due to the airflow is not performed. If there is a possibility that a dead space may occur, and the delivery channel 71 is arranged on the rear side, it is defined by the halogen lamp 4 (more specifically, the center point of the globe 40 of the halogen lamp 4) and the delivery channel 71. Since the direction to be reflected approaches the direction orthogonal to the front-rear direction (see FIG. 7B), the infrared rays emitted from the halogen lamp 4 leak directly from the reflector 10 via the delivery channel 71 and are reflected by the reflector 10. This is due to a decrease in efficiency and light collection rate.

In addition, it is desirable to set the opening length dimension (w1) of the delivery channel 71 in the front-rear direction to 5 mm or less. This is because when the length width dimension (w1) of the delivery flow path 71 exceeds 5 mm, the opening becomes too large, and the venturi effect is not exhibited well, and the delivery flow path 71 is sent to the dry air flow path 52. This is because the amount of air to be reduced is reduced and the reflection efficiency and the light collection rate of the reflector 10 are reduced.

(Example 2)
8 and 9 show a second embodiment of a dryer (hair dryer) according to the present invention in which the structure of the delivery channel 71 is changed. In the second embodiment, the reflector 10 is divided into two, a short cylindrical front reflector 80 having a small front and rear length dimension, and a rear reflector 81 having a straight cylindrical portion 51 and a conical portion 50. A difference between the first embodiment and the first embodiment is that a gap E is formed between the two 81 and this is used as a delivery channel 71. The front reflector 80 is supported by mica plates 58 and 58 by a pair of ribs 61 and 61. The total length of the reflector 10 including the front reflector 80, the gap E, and the rear reflector 81 is defined as d1, and the distance defined by the rear end edge of the optical filter 11 and the opening edge on the rear end side of the delivery channel 71 is defined as d2. , The delivery channel 71 is formed at a position satisfying the relational expression d2 ≦ d1 / 5. The length dimension of the gap E in the front-rear direction is set to 5 mm or less (w1 ≦ 5 mm). Since the other points are the same as those of the first embodiment, the same members are denoted by the same reference numerals and the description thereof is omitted. The same applies to the following embodiments.

In this way, when the reflector 10 is constituted by the front reflector 80 and the rear reflector 81, the reflectors 80 and 81 are arranged to face each other with the gap E interposed therebetween, and the gap E is used as the delivery flow path 71, the first embodiment. Compared with the case where the gap E is formed between the rear end edge of the optical filter 11 and the front end edge of the reflector 10 as described above, the length dimension of the front and rear from the rear end edge of the reflector 10 to the front end edge of the optical filter 11 is as follows. Can be reduced by the gap E, which contributes to the compactness of the hair dryer. The same applies to Examples 3 and 4 below.

Example 3
10 and 11 show a third embodiment of a dryer (hair dryer) according to the present invention in which the structure of the delivery channel 71 is changed. In Example 3, the point which forms the delivery flow path 71 as the circular slit opening 84 opened over the perimeter of the surrounding wall which comprises the reflector 10 so that the front opening edge of the reflector 10 may be followed. This is different from the first embodiment. When the length of the reflector 10 is defined as d1, and the distance defined between the rear end edge of the optical filter 11 and the opening edge on the rear end side of the delivery channel 71 (slit opening 84) is defined as d2, d2 ≦ The delivery channel 71 is formed at a position that satisfies the relational expression d1 / 5. The length dimension (w1) in the front-rear direction of the slit opening 84 is set to 5 mm or less. The slit openings 84 are equally divided into four, and connecting ribs 85 are formed between adjacent slit openings 84.

(Example 4)
12 and 13 show a fourth embodiment of a dryer (hair dryer) according to the present invention in which the structure of the delivery channel 71 is changed. In the fourth embodiment, the delivery flow path 71 is constituted by a group of a large number of through holes 86 arranged along the entire circumference of the peripheral wall constituting the reflector 10 along the front opening edge of the reflector 10. This is different from the previous first embodiment. When the length of the reflector 10 is defined as d1, and the distance defined by the rear end edge of the optical filter 11 and the opening edge on the rear end side of the delivery channel 71 (through hole 86) is defined as d2, d2 ≦ The delivery channel 71 is formed at a position that satisfies the relational expression d1 / 5. The length dimension (w1) in the front-rear direction of the through hole 86 is set to 5 mm or less.

(Example 5)
FIG. 14 shows a fifth embodiment of a dryer (hair dryer) according to the present invention in which the structure of the reflector 10 is changed. The fifth embodiment is different from the first embodiment in that the entire reflector 10 has a hemispherical shell shape. More specifically, the reflecting portion of the reflector 10 is formed in a front-expanding taper shape in which the diameter dimension gradually increases as going forward. A gap E serving as a delivery channel 71 is formed between the front end of the reflector 10 and the rear end of the optical filter 11.

In each of the above embodiments, the heat ray light source can be composed of an incandescent lamp, a xenon lamp, a metal halide lamp, etc. in addition to the halogen lamp 4. The touch sensor 12 can be omitted, and in that case, the power switch 14 is switched to drive only the blower fan 3, and the low-temperature low-wind mode that drives the blower fan 3 and the heat source 4 simultaneously. It is possible to switch to the high temperature / strong wind mode where the air volume is higher than the weak wind mode and the air volume is large. The main body case 1 can be formed in an elliptical cylindrical shape or a polygonal cylindrical shape in addition to the cylindrical shape, and a foldable grip may be provided on the lower surface side of the main body case 1 as necessary. The present invention can be applied not only to humans but also to dryers for animals such as dogs and cats.

1 Body case 3 Blower fan 4 Hot wire light source (halogen lamp)
DESCRIPTION OF SYMBOLS 7 Air guide part 10 Reflector 11 Optical filter 52 Drying air flow path 70 Suction flow path 71 Delivery flow path 80 Front reflector 81 Rear reflector 84 Slit opening 86 Through-hole

Claims (7)

A main body case (1) having a hollow cylindrical air guide portion (7) extending from the rear side suction port (8) to the front side outlet (9);
A blower fan (3) provided in the air guide section (7) for generating an air flow from the suction port (8) toward the blowout port (9);
A heat ray light source (4) disposed on the front side of the blower fan (3) in the air guide section (7) and radiating radiant heat rays including infrared rays;
A reflector (10) which is disposed on the front side of the heat linear light source (4) in the air guide section (7) and reflects and guides the radiant heat rays emitted from the heat linear light source (4) toward the front;
An optical filter (11) that is disposed on the front side of the reflector (10) in the air guide (7) and that attenuates visible light by transmitting radiant heat rays among the light emitted from the front end of the reflector (10); ,
A dry air flow path (52) formed between the outer periphery of the reflector (10) and the inner surface of the body case (1);
An exhaust heat structure for exhausting the heat in the reflector (10) to the outside;
With
The heat exhaust structure is formed only at the rear end of the reflector (10), and a suction flow path (70) for receiving a part of the air flow generated by the blower fan (3) inside the reflector (10); It is formed only at the front end of the reflector (10), and is composed of a delivery channel (71) that sends out the air in the reflector (10) toward the dry air channel (52),
The pressure in the flow path of the dry air flow path (52) in the formation area of the delivery flow path (71) is smaller than the pressure in the flow path of the dry air flow path (52) in the formation area of the suction flow path (70). A dryer characterized in that it is configured. The length of the front-rear direction reflector (10) defined by the rear end of the optical filter (11) and the rear end of the reflector (10) is defined as d1, and the rear end of the optical filter (11) and the delivery channel ( 71) When the distance defined by the opening edge on the rear end side is defined as d2,
The dryer according to claim 1, wherein the delivery channel (71) is formed at a position satisfying the relational expression d2≤d1 / 5. The dryer according to claim 2, wherein an opening length dimension (w1) of the delivery channel (71) in the front-rear direction is set to 5 mm or less. The gap (E) serving as a delivery channel (71) is formed between the rear end of the optical filter (11) and the front end of the reflector (10). Hairdryer. The reflector (10) includes a front-side front reflector (80) and a rear-side rear reflector (81).
The dryer according to any one of claims 1 to 3, wherein a gap (E) serving as a delivery channel (71) is formed between the front and rear reflectors (80, 81). The delivery flow path (71) is formed as a circular slit opening (84) opened over the entire circumference of the peripheral wall constituting the reflector (10) so as to be along the front opening edge of the reflector (10). The dryer according to any one of claims 1 to 3. A group of a large number of through holes (86) arranged along the entire circumference of the peripheral wall constituting the reflector (10) such that the delivery flow path (71) is along the front opening edge of the reflector (10). The dryer according to any one of claims 1 to 3, comprising:

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