Multi-layer heat sink for home drying appliances

Abstract

To provide a multi-layered heat sink for a home drying appliance capable of simultaneously irradiating hot and cold air without damaging an object to be dried. [Solution] A heat sink K has a heat pipe body 3 having a flat heat receiving portion 30 with a hollow interior 4, and fins 5 are connected in an axially upright state on the inner and outer surfaces of the heat pipe body 3, and a plurality of heat pipe bodies 3 having fins 5 of different sizes are arranged overlapping each other. A film heater 2 is sandwiched between the heat pipe bodies 3 and installed in contact with the heat receiving portion 30 to form a multi-layer structure. When a motor is operated, cold air is blown out from the hollow interior 4 of the smallest heat pipe body 3 having the fins 5, and hot air is blown out from the gaps between the fins 5 of the heat pipe body 3 heated by the film heater 2, and two different temperature ranges, cold air and hot air that are less likely to damage the object to be dried by the hot air, are simultaneously irradiated.

Description

[Technical field]

[0001] The present invention relates to the technical field of heat sinks for household dryers, and more particularly to a multi-layer heat sink for use in household dryers such as hair dryers that irradiate hot and cold air simultaneously without damaging the object being dried. [Background technology]

[0002] Conventionally, known heat sink technologies include a block-shaped one as shown in Fig. 37A, and a cross-shaped insulator with a heating wire wound three-dimensionally around it as shown in Fig. 37B. These are used to heat the air blown from the motor with a heater and blow the hot air out from the air outlet. Furthermore, for example, the following Patent Document 1 discloses a heat sink comprising a heat pipe having a heat receiving portion thermally connected to a heat generating element, and a heat exchange portion thermally connected at the heat dissipation portion of the heat pipe, wherein the heat pipe communicates from the heat receiving portion to the heat dissipation portion and has an internal space in which a working fluid is sealed, the portion of the heat receiving portion facing the heat generating element is a flat portion that is flat along the extension direction of the heat generating element, the flat portion is in direct contact with the heat generating element, a plurality of the heat pipes are provided, and the heat transport characteristics of a first heat pipe are different from the heat transport characteristics of a second heat pipe (see claim 1 in the same document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2024-16787 A Summary of the Invention [Problem to be solved by the invention]

[0004] Fabrics, hair, and other objects to be dried can be damaged if they are simply dried by applying hot air (warm air). Stronger heat or wind is not always better. It is necessary to dry in as short a time as possible while maintaining the moisture content, and this is the problem that needs to be solved. In this regard, the above-mentioned block-shaped (Fig. 37A) or cross-shaped insulator with a heating wire wound three-dimensionally (Fig. 37B) does not have a structure for rectifying the airflow from the motor against frictional resistance, so vibration, noise, airflow, and heat regulation are not possible. These are heaters that simply emit heat, and there is no way to switch to cold air other than cutting off the power to the heater. In other words, it is not possible for them to emit hot and cold air simultaneously as a so-called drying device. In addition, the heat sink of Patent Document 1 mentioned above can exhibit cooling properties even for heat generating elements with high heat output by reducing the thermal resistance when heat is transferred from the heat generating element to the heat receiving part of the heat pipe, but it cannot solve the problems mentioned above.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a multi-layer heat sink for a household dryer that can simultaneously irradiate two different temperature ranges, hot and cold, without damaging the object to be dried. [Means for solving the problem]

[0006] As a means for solving the problem, the invention described in claim 1 relates to a heat sink K for a domestic drying appliance having a heating element 2 and a motor 1, (a) The heat sink K has a cylindrical heat pipe body 3 having a flat heat receiving portion 30 with a hollow interior 4, and a plurality of fins 5 that radiate heat by thermal conduction from the heat generating portion 30 are connected in an axially upright state to the inner surface 30a and / or the outer surface 30b of the cylindrical heat pipe body 3, (b) a plurality of heat pipe bodies 3 each having a plurality of fins 5 of different sizes are arranged in a stacked manner; (c) the heat generating element 2 is a film heater, and the film heater 2 is sandwiched between the heat pipe bodies 3 and is provided in contact with the heat receiving portion 30 to form a multi-layer structure; (d) The motor 1 is operated to blow cold air 9 from the hollow interior 4 of the smallest heat pipe body 3 having the fins 5, and hot air 10 is blown from the gaps between the fins 5 of the heat pipe body 3 heated by the film heater 2, so that the cold air 9 and the hot air 10 are simultaneously irradiated to the object to be dried in two different temperature ranges that are less likely to damage the object to be dried with hot air. The present invention relates to a multi-layer heat sink for a household drying appliance.

[0007] The invention described in claim 2 is a heat sink K for a domestic drying appliance having a heating element 2 and a motor 1, (a) The heat sink K has a heat box body 3′ having a hollow, flat heat receiving portion 30 with a plurality of fins 5 connected in an axial direction in an upright state to an inner surface 30a and / or an outer surface 30b thereof, the inner surface 4 being hollow and flat, and the fins 5 radiate heat by heat conduction from the heat generating portion 30; (b) a plurality of heat box bodies 3' each having a plurality of fins 5 of different sizes are arranged in a stacked manner; (c) the heating element 2 is a film heater, and the film heater 2 is sandwiched between the heat box bodies 3' and is provided in contact with the heat receiving part 30 to form a multi-layer structure; (d) The motor 1 is operated to blow cold air 9 from the hollow interior 4 of the smallest heat box body 3' having the fins 5, and hot air 10 is blown from the gaps between the fins 5 of the heat box body 3' heated by the film heater 2, so that the cold air 9 and the hot air 10 are simultaneously irradiated to the object to be dried in two different temperature ranges that are less likely to be damaged by the hot air. The present invention relates to a multi-layer heat sink for a household drying appliance.

[0008] The device described in claim 3 is a multi-layered heat sink for a domestic drying appliance described in claim 1 or 2, characterized in that a central pipe body 3X or central box body 3X' without fins 5 is arranged inside the smallest heat pipe body 3 or heat box body 3' having the fins 5.

[0009] The device described in claim 4 is a multi-layer heat sink for a domestic drying appliance described in claim 1 or 2, characterized in that an intervening pipe body 3Y or an intervening box body 3Y' without fins 5 is arranged between adjacent heat pipe bodies 3 or heat box bodies 3' having the fins 5, and the film heater 2 is installed by being sandwiched inside or outside the intervening pipe body 3Y or intervening box body 3Y'.

[0010] The device described in claim 5 is a multi-layered heat sink for a household drying appliance described in claim 3, characterized in that the heat pipe body 3 or heat box body 3' equipped with the film heater 2 is maintained at 100°C or higher, and the hollow interior 4 of the central pipe body 3X or central box body 3X' without fins 5 is maintained at 40°C or lower.

[0011] The device described in claim 6 is a heat pipe body 3 having the fins 5, which comprises a smallest pipe body 3A having a small diameter, one or more intermediate pipe bodies 3B having a medium diameter arranged on the outer surface of the smallest pipe body 3A, and a largest pipe body 3C having a largest diameter arranged on the outer surface of the intermediate pipe body 3B, The film heater 2 attached to the largest pipe body 3C has the largest area and can generate high temperature, the film heater 2 attached to the intermediate pipe body 3B can generate medium temperature, and the film heater 2 attached to the smallest pipe body 3A can generate low temperature. The multi-layered heat sink for a household drying appliance according to claim 1 is characterized in that each of the film heaters 2 can be selected simultaneously to irradiate different temperatures onto the object to be dried at the same time, or each of the film heaters 2 can be selected independently to irradiate a desired temperature onto the object to be dried.

[0012] The invention described in claim 7 is that the heat box body 3' having the fins 5 is composed of a minimum minimum box body 3A', one or more intermediate box bodies 3B' arranged on the outer surface of the minimum box body 3A', and a maximum maximum box body 3C' arranged on the outer surface of the intermediate box body 3B', The film heater 2 installed in the largest box body 3C' has the largest area and can generate high temperature, the film heater 2 installed in the middle box body 3B' can generate medium temperature, and the film heater 2 installed in the smallest box body 3A' can generate low temperature. The multi-layered heat sink for a household drying appliance according to claim 2 is characterized in that each of the film heaters 2 can be selected simultaneously to irradiate different temperatures onto the object to be dried at the same time, or each of the film heaters can be selected independently to irradiate a desired temperature onto the object to be dried.

[0013] The device described in claim 8 is a multi-layered heat sink for a household drying appliance described in claim 1, 2, 6 or 7, characterized in that the heat emitted from each layer of the multi-layered film heater 2 is constant.

[0014] The device described in claim 9 is a multi-layered heat sink for a household drying appliance described in claim 1 or 2, characterized in that the heat pipe body 3 or heat box body 3' having the fins 5 is large and has a short overall axial length so that heat dissipation on the heating side and cooling side is fast.

[0015] The invention described in claim 10 is a heat pipe body 3 or a heat box body 3' having the fins 5, the fins 5 being raised at intervals of about 1.2 mm to 2.5 mm on the inner surface and / or outer surface of a metal plate, stainless steel plate, or aluminum plate that has been subjected to reversible insulating processing and is thinned to about 0.3 mm to 0.4 mm, The film heater 2 is a multi-layered heat sink for a household drying appliance as described in claim 1 or 2, characterized in that it is a planar heating element having high heat dissipation efficiency on the heating side and the cooling side, reduced frictional resistance, and reversibility.

[0016] The invention described in claim 11 is a multi-layered heat sink for a domestic drying appliance described in claim 1, 2 or 6, characterized in that the fins 5 are made of aluminum or stainless steel that has been subjected to insulation processing and terahertz radiation processing, and are formed in a wall-type upright shape, a streamlined upright shape, or a twisted upright shape.

[0017] The device described in claim 12 is a multi-layer heat sink for a household drying appliance described in claim 11, characterized in that the insulating processing and terahertz radiation processing of the fins 5 are performed by applying a heat-resistant resin paint mixed with silica that emits terahertz frequencies.

[0018] The device described in claim 13 is a multi-layered heat sink for a domestic drying appliance described in claim 1, 2, 6 or 7, characterized in that a mortar-shaped squeezer section 8 with an open bottom is provided at the outlet 7 of the heat pipe body 3 or heat box body 3' having the fins 5, and cold air 9 is irradiated in a concentrated manner onto the object to be dried.

[0019] The invention described in claim 14 is a multi-layered heat sink for a household dryer described in claim 1 or 2, characterized in that the household dryer to which the heat sink K is attached is a hair dryer S or a futon dryer, a clothes drying hanger, or a shoe dryer. Effect of the Invention

[0020] The multi-layered heat sink for household dryers of the present invention has a multi-layered structure in which a film heater, which is installed in household dryers such as hair dryers, is sandwiched between each heat pipe body and each heat box body. When in use, cold air is blown out from the hollow interior in the center, and hot air is blown out from the gaps between the fins of the heat pipe bodies, etc., which have been heated by the film heater. This allows the simultaneous irradiation of two different temperature ranges, cold air and hot air, which prevents damage to the items to be dried (fabrics, hair, etc.) by hot air, achieving safe and secure use of the household dryer. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view showing a multi-layer heat sink for a household drying appliance according to a first embodiment (heat pipe body). [Diagram 2] FIG. 2 is a perspective view of FIG. [Diagram 3] FIG. 2 is a perspective view of FIG. 1 as seen from above. [Figure 4] (A) is a perspective view showing a central pipe body, (B) is a perspective view showing the state where the smallest pipe body is attached to the central pipe body of (A), and (C) is a perspective view showing the state where one part of a small intermediate pipe body is attached to the smallest pipe body of (B), but without a film heater. [Diagram 5] 5 is a perspective view showing a state in which the other part of the small intermediate pipe body is attached from the state shown in FIG. 4, but without the film heater. [Figure 6] 6 is a perspective view showing a state in which one portion of a large intermediate pipe body is attached from the state in FIG. 5, but without a film heater. [Figure 7] 7 is a perspective view showing a state in which the other part of the large intermediate pipe body is attached from the state shown in FIG. 6, but without the film heater. [Figure 8] 8 is a perspective view showing a state in which the largest pipe body is attached from the state shown in FIG. 7, but without a film heater. [Figure 9]9 is a perspective view showing a state in which the film heater is clamped and fixed by a clamping member in the state shown in FIG. 8, but without a film heater. [Figure 10] FIG. 10 is a side view of FIG. [Figure 11] FIG. 2 is a perspective view showing the installation state of the first film heater. [Figure 12] FIG. 11 is a perspective view showing the installation state of the second layer film heater. [Figure 13] FIG. 11 is a perspective view showing the installation state of the third layer film heater. [Figure 14] FIG. 14 is a perspective view showing a state in which the largest pipe body is attached from the state shown in FIG. 13. [Figure 15] 15 is a perspective view showing the multi-layer heat sink of the first embodiment completed by bolting from the state shown in FIG. 14. FIG. [Figure 16] FIG. 16 is a front view of FIG. [Figure 17] 16 is a rear perspective view of FIG 15, with the central pipe body omitted. [Figure 18] FIG. 2 is a plan view showing the film heater before installation. [Figure 19] This is a thermography diagram of experimental data showing the temperature when cold air and hot air are simultaneously irradiated with the squeezer part attached. [Figure 20] 1 is a perspective view showing a multi-layer heat sink for a household drying appliance according to a second embodiment (heat box body), with attachment pieces omitted. [Figure 21] This is a front view of Fig. 20. However, the central box body is omitted (the same applies to Figs. 34 and below). [Figure 22] FIG. 22 is a perspective view of FIG. 21 as seen from above. [Figure 23] 1A is a perspective view showing the minimum box body, and FIG. 1B is a perspective view showing a state in which one part of a small intermediate box body is attached to the minimum box body of FIG. 1A, but without a film heater. [Figure 24]23(A) is a perspective view showing the state where the other part of the small intermediate box body is attached from the state shown in FIG. 23(B), and (B) is a perspective view showing the state where one part of the large intermediate box body is attached to the small intermediate box body shown in (A), but in which the film heater is not provided. [Diagram 25] 24(B) is a perspective view showing a state in which the other part of the intermediate box body is attached, but without the film heater. [Figure 26] 26 is a perspective view showing a state in which the largest box body is attached from the state in FIG. 25, but without the film heater. [Figure 27] 27 is a perspective view showing the state in which the clamping member is clamped and fixed in the state shown in Fig. 26, but without the film heater. [Figure 28] FIG. 28 is a side view of FIG. 27. [Figure 29] FIG. 2 is a perspective view showing the attachment state of a first layer film heater in a heat box body. [Diagram 30] FIG. 11 is a perspective view showing the attachment state of a second layer film heater in the heat box body. [Diagram 31] FIG. 11 is a perspective view showing the attachment state of a third layer film heater in the heat box body. [Diagram 32] 32 is a perspective view showing a state in which the largest box body is attached from the state shown in FIG. 31. FIG. [Diagram 33] FIG. 33 is a rear perspective view of FIG. 32. [Diagram 34] FIG. 34 is a rear view of FIG. 33. [Diagram 35] FIG. 1 is an explanatory diagram showing a simplified general structure of a conventional hair dryer. [Diagram 36] FIG. 1A is a simplified explanatory diagram showing the internal structure of a conventional futon dryer with a built-in block-type heater, and FIG. 1B is a simplified explanatory diagram showing the internal structure of a conventional hanger dryer or shoe dryer with a built-in block-type or cylindrical heater. [Figure 37] 1A and 1B are perspective views showing an example of a conventional heat sink. BEST MODE FOR CARRYING OUT THEINVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the multi-layer heat sink for a household drying appliance of the present invention will be described below with reference to the drawings. This heat sink K is suitable for use in household drying appliances, and below we will explain an example in which it is applied to a hair dryer S (see Figure 35), but it can also be implemented in various household drying appliances such as a futon dryer (see Figure 36A), a clothes drying hanger, and a shoe dryer (see Figure 36B), whose explanation will be omitted. Here, the structure of a conventional hair dryer S will be briefly explained with reference to Fig. 35. It is equipped with an electric motor 1, a fan a driven by the motor 1, and a heater b which is an electric heater. The electric heater b can have various heat sources such as a nichrome wire heater, a PTC heater, a ceramic heater, or a sheath heater. The structure and mechanism of the hair dryer S, particularly for blowing cold air 9 and hot air 10, is as follows. That is, the hair dryer S mainly produces hot air 10 by blowing air from fan a onto electric heater b. Fan a is driven by electric motor 1, and electric heater b uses a resistance heating system that generates heat by passing electricity through it. When the device is plugged into an outlet (not shown) to secure power and the switch is turned on, the rotational motion of motor 1 rotates fan a via the shaft. At the same time, electric heater b is also heated and becomes hot. When cold air 9 from fan a is sent to electric heater b, the cold air 9 absorbs the heat from electric heater b and escapes to the air outlet 7. Typically, a bimetal or NTC thermostat c and a thermal fuse d (emergency stop breaker in case of thermal runaway) are attached to the electric heater b. Thus, the temperature is monitored (managed) by the thermostat c, and a constant temperature is maintained by raising and lowering the temperature. In the worst case scenario of temperature runaway, the fuse d is activated to make an emergency stop, which is a safety mechanism. On the other hand, the film heater 2 of this embodiment, which will be described later, is also compatible with DC direct current, so there is no need to use the thermostat c, and there is the advantage that the released heat can always be maintained at a constant temperature.

[0023] <First Example> The multi-layered heat sink K of the household drying appliance of this embodiment is a heat sink used in hair dryers S and the like that simultaneously irradiates hot and cold air at two different temperatures and does not damage the object to be dried. As shown in Figures 1 to 3, a heat pipe body 3 having a hollow interior 4 formed in a hollow shape has multiple fins 5 serving as heat dissipation parts connected in an upright state in the axial direction to the inner surface 30a and outer surface 30b of the heat pipe body 3. Four different sizes (inner diameters) of heat pipe body 3 are used. The axial length of each is the same at 40 mm. The smallest pipe body 3A has an inner diameter of φ=30mm, and is referred to here as the "smallest pipe body 3A." The next largest inner diameter after the smallest pipe body 3A is referred to as the "intermediate pipe body 3B." There are two types of intermediate pipe body 3B, the smaller one having an inner diameter of φ=39mm and the larger one having an inner diameter of φ=42mm. The heat pipe body 3 with the largest inner diameter after the larger of the two intermediate pipe bodies 3B, with an inner diameter of φ=50mm, is referred to as the "largest pipe body 3C." The heat pipe body 3 having the plurality of fins 5 of different sizes is disposed in a stacked manner from smallest to largest (see Figs. 4 to 9).

[0024] The heat pipe body 3 is formed by forming convex fins 5, which are arranged in an upright wall shape and are connected to the inner surface 30a and outer surface 30b of a metal plate (or a stainless steel plate or an aluminum plate) made of a flat heat receiving portion 30 that has been thinned to about 0.3 mm to 0.4 mm and has been subjected to a reversible insulating process, at intervals of about 1.2 mm to 2.5 mm, to dissipate heat (air conditioning) by heat conduction from the heat generating portion 30. However, the fins 5 can also be formed in various desired shapes, such as a streamlined upright shape or a twisted upright shape (not shown). The fins 5 are made of aluminum (or stainless steel) that has been treated for insulation and terahertz radiation. The insulation and terahertz radiation are preferably performed by applying a heat-resistant resin paint mixed with silica that emits terahertz waves. That is, anhydrous silica powder is mixed into the heat-resistant paint, which is then sprayed and baked. The terahertz radiation efficiently heats the fibers (wool) that are the object to be dried, and the drying is performed quickly.

[0025] Usually, as shown in Fig. 4B, a central pipe body 3X without fins 5 shown in Fig. 4A is disposed inside the heat receiving portion 30 of the smallest heat pipe body 3 (smallest pipe body 3A) having the fins 5. The smallest pipe body 3A has a plurality of fins 5 provided on its inner surface 30a facing inward toward the center, so that the hot air 10 stored in heat by the film heater 2 is guided in the direction of the outlet 7 via the fins 5. This is a mechanism in which cold air 9 is blown out into the hollow interior 4 of the central pipe body 3X without fins 5.

[0026] To explain each heat pipe body 3 in detail, the minimum pipe body 3A has 36 fins 5 on its inner surface 30a facing inward toward the center, evenly spaced at a pitch of 2.3 mm. The fins 5 are about 3.35 mm high and 0.3 to 0.4 mm thick. The top of this minimum pipe body 3A is formed into a protrusion 32 that protrudes slightly upward. As shown in FIG. 4A, this minimum pipe body 3A is disposed on the outer periphery of the intermediate pipe body 3X (FIG. 4B). Next, the smaller of the two types of intermediate pipe bodies 3B has 33 fins 5 arranged at equal intervals facing outward on the outer surface 30b (see FIG. 4C), and 33 fins 5 arranged at equal intervals facing inward on the inner surface 30a (see FIG. 5), which are overlapped to fill the gaps between adjacent fins 5. Each fin 5 is about 2.5 mm high and about 0.3 mm to 0.4 mm thick. A total of 66 fins 5 are provided. The top of this small intermediate pipe body 3B is formed into a mountain-shaped protrusion 33, which is arranged to cover the protrusion 32 of the smallest pipe body 3A. Similarly to the small intermediate pipe body 3B, the larger of the two types of intermediate pipe bodies 3B has 32 fins 5 facing outward on the outer surface 30b at equal intervals of 3.6 mm (see FIG. 6) and 32 fins 5 facing inward on the inner surface 30a at equal intervals of 3.6 mm (see FIG. 7), which are overlapping and arranged to fill the gaps between adjacent fins 5. Each fin 5 is about 3.5 mm high and about 0.3 mm to 0.4 mm thick. A total of 64 fins 5 are provided. However, the six fins 5 located at the top are gradually shorter. This is to clamp and fix each heat pipe body 3 at the upper end of the largest pipe body 3C described later. The largest pipe body 3C has 68 fins 5 arranged on the outer surface 30b at equal intervals of 1.9 mm, facing outward, as shown in Fig. 8. Each fin 5 is approximately 2.5 mm high and approximately 0.3 mm to 0.4 mm thick, with the uppermost fins 5 being gradually higher. The top of this maximum pipe body 3C is formed into an upwardly protruding mountain-shaped convex portion 6. After a film heater 2 (described later) is attached, the mountain-shaped convex portion 6 is sandwiched from the left and right sides with a sandwiching member 16 having through holes 17 at the front and rear, and then a bolt 11 is inserted through the through hole 17 and fastened in place with a nut 12 (see Figs. 9 to 12).

[0027] In addition, an intervening pipe body (not shown) without fins 5 can be arranged between adjacent heat pipe bodies 3 having fins 5, and the film heater 2 can be installed by being sandwiched inside or outside this intervening pipe body.

[0028] A film heater 2 suitable as a heating element is sandwiched between the heat pipes 3 of the smallest pipe body 3A, the central pipe body 3B, and the largest pipe body 3C described above, and is provided in a multi-layer structure in surface contact with the flat heat receiving section 30. In this embodiment, an example is shown in which the film heater 2 is implemented in three layers, a first layer of film heater 2A, a second layer of film heater 2B, and a third layer of film heater 2C, which will be described later. The film heater 2 shown in Fig. 18 is a film-like heating device that uses a plastic film as a base material, and is made of a planar heating element (it may be called a sheet heater, planar heater, polyimide heater, or any other name) that has high heat dissipation efficiency on the heating side and cooling side, reduces frictional resistance, and has reversibility. The heat emitted from the film heater 2 is constant. The heat pipe body 3 equipped with the film heater 2 is kept at 100°C or higher, and the hollow interior 4 of the central heat pipe body 3X without fins 5 is kept at 40°C or lower. 11, one end of this film heater 2 is formed into a power connection terminal 20 that is bent slightly at a right angle, and a connection cord 21 is connected to this power connection terminal 20. In addition, the corner of the other end of the film heater 2 is formed into a connection piece 22 that is bent at a right angle and then bent again at a right angle. Thus, the film heater 2 is thin and highly flexible, and in this embodiment, the thickness is about 0.3 mm, the length in the short side direction (depth direction) is the same at 36 mm, but the length in the longitudinal direction is appropriately set within a range of about 111 mm to 152 mm, and is formed to be approximately the same size as the inner surface 30a and outer surface 30b of each of the above-mentioned heat pipe bodies 3A, 3B, and 3C. For example, the length in the longitudinal direction of the film heater 2 attached in contact with the outer surface 31 of the smallest pipe body 3A is about 111 mm.

[0029] Thus, in the heat pipe body 3 having multi-layered fins 5 consisting of a small diameter minimum pipe body 3A, a medium diameter intermediate pipe body 3B arranged on the outside of that, and a maximum pipe body 3C with the largest diameter arranged on the outside of that, the film heater 2 attached to the maximum pipe body 3C has the largest area and is capable of generating high temperatures, the film heater 2 attached to the intermediate pipe body 3B is capable of generating medium temperatures, and the film heater 2 attached to the minimum pipe body 3A is capable of generating low temperatures. Therefore, each film heater 2 can be selected simultaneously to irradiate the object to be dried with different temperatures at once, or each film heater 2 can be selected independently to irradiate the object to be dried with a desired temperature.

[0030] In the best mode, the heat pipe body 3 having the fins 5 is preferably formed so that the smallest heat pipe body 3 (smallest pipe body 3A) is large and the total axial length is short, for example, 35 mm to 40 mm, so that the heat radiation from the heating side and the cooling side is fast. However, the size of the heat pipe body 3 is not limited to this.

[0031] Here, the procedure for attaching the film heater 2 to the heat pipe body 3 described above will be described with reference to Figures 11 to 17. Note that here, an embodiment type is shown in which the peak-shaped protrusion 33 is not present in the maximum pipe body 3C of the example shown in Figures 1 to 10. First, as shown in FIG. 11, the smallest pipe body 3A is laminated on the outer periphery of the central pipe body 3X, and then the first film heater 2A of the film heater 2 is laminated on the outer periphery of the smallest pipe body 3A. Next, as shown in FIG. 12, the smaller intermediate pipe body 3B is laminated onto the outer periphery of the film heater 2A of the first layer, and then the film heater 2B of the second layer is joined onto its outer periphery. Next, as shown in FIG. 13, a larger intermediate pipe body 3B is laminated, and then a third layer of film heater 2C is laminated around the outer periphery of the larger intermediate pipe body 3B. Thereafter, the largest pipe body 3C is superimposed on the outer periphery of the film heater 2C of the third layer as shown in Fig. 14. It is preferable to fix an L-shaped attachment piece 50 to the fin 5 at one end of this largest pipe body 3C. This is because it is easy to attach it by matching it with the connection piece 22 of the film heater 2. Finally, as shown in FIGS. 15 to 17, the fins 5 at the butted ends of the largest pipe section 3C are fixed together with the bolts 11 and nuts 12 via the clamping members .

[0032] Although not shown in the drawings, a preferred embodiment is one in which a squeezer section, slightly smaller than the outlet 13 and shaped like a mortar with an open bottom, is provided at the outlet 13 of the heat pipe body 3 having the fins 5. This is to concentrate the cold air 9 on the object to be dried. The flow of the cold air 9 and the hot air 10 in the embodiment provided with this squeezer section is shown in Figure 19. That is, it can be seen that the cold air 9 displayed in a dark color is blown out from the center of the outlet 13 of the hair dryer S, and the hot air 10 displayed in a light color is blown out from the outside.

[0033] Therefore, according to the multi-layer heat sink K of this embodiment, air is blown out by the operation of the motor 1 (see Figure 35), and cool air 9 is blown out from the hollow interior 4 of the central pipe body 3X arranged inside the smallest heat pipe body 3 having fins 5. At the same time, the heat warmed by each heat pipe body 3 by the film heater 2 is thermally conducted to the fins 5 and is also thermally radiated from between adjacent fins 5 in the direction of the air outlet 13, so that hot air 10 is blown out from the gaps between the fins 5 of each heat pipe body 3 (the smallest pipe body 3, the intermediate pipe body 3B, and the largest pipe body 3C). Therefore, the cold air 9 and the hot air 10 are irradiated simultaneously in two different temperature ranges, making it difficult for the object to be dried to be damaged by the hot air.

[0034] <Second Example> The second embodiment shown in Figs. 20 to 34 will now be described. The multi-layered heat sink K according to the second embodiment is implemented with a box-shaped heat box body 3' having a hollow interior 4, instead of the above-mentioned heat pipe body 3, and is generally similar to the first embodiment. The completed box-shaped heat box body 3' has dimensions of 58 mm in length, 52 mm in width, and 37 mm in depth. A plurality of fins 5 are erected in the axial direction on the inner side surface 30a and outer side surface 30b of the heat box body 3' such as the smallest box body 3A', the intermediate box body 3B', and the largest box body 3C', and a plurality of heat box bodies 3' having a plurality of fins 5 of different sizes are arranged one on top of the other. In the center of the smallest box body 3A', a smaller central box body 3X' without fins 5, which corresponds to the central pipe body 3X in the first embodiment, is arranged. Each of the film heaters 2', that is, the first layer film heater 2A', the second layer film heater 2B', and the third layer film heater 2C', is sandwiched between the smallest box body 3A', the intermediate box body 3B', and the largest box body 3C' heat box bodies 3', respectively, to form a multi-layer structure in which the film heaters 2' are attached in surface contact with the heat receiving section 30. This film heater 2' can be folded, and is attached by folding along the shape of the box-shaped heat box body 3'.

[0035] The procedure for attaching the film heater 2' to the heat box body 3' will be described with reference to Figs. First, as shown in FIG. 29, a minimum box body 3A' is arranged on the outer periphery of a central box body that does not have fins 5 (not shown), and then the first layer of film heater 2A' among the film heaters 2' is superimposed on the outer periphery of the minimum box body 3A'. Next, as shown in Fig. 30, a smaller intermediate box body 3B' is laminated on the outer periphery of the first layer film heater 2A', and then a second layer film heater 2B' is laminated on the outer periphery of that. Next, as shown in Fig. 31, a larger intermediate box body 3B' is laminated on the outer periphery of that, and then a third layer film heater 2C' is laminated on the outer periphery of that. Thereafter, as shown in Figs. 32 to 34, a maximum box body 3C' is laminated onto the outer periphery of the third layer of film heater 2C', completing a heat box body 3' equipped with a film heater 2'. As in the first embodiment, an embodiment is preferably adopted in which an L-shaped mounting piece 50 is fixed to the fin 5 at one end of this largest box body 3C' and matched with the connection piece 22 of the film heater 2 to facilitate installation. The butt ends of the largest box body 3C' are fixed with a bolt 11 and a nut 12 via a clamping member 7.

[0036] Therefore, in the heat box body 3', like the heat pipe body 3 described above, the motor 1 is operated to blow air, which blows cold air 9 from the hollow interior 4 of the smallest box body 3A', while hot air 10 is blown out from the gaps between the fins 5 of each heat box body 3' heated by the film heater 2, making it possible to simultaneously irradiate the object to be dried with two different temperature ranges, the cold air 9 and the hot air 10, which are less likely to damage the object to be dried with hot air.

[0037] Although the embodiments have been described above based on the drawings, it should be noted that the present invention is not limited to the illustrated examples, and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that the scope does not deviate from the technical concept of the present invention. [Explanation of symbols]

[0038] K Multi-layer heat sink 1 Motor 2, 2' Film heater (heating element) 2A, 2A' 1st layer film heater 2B, 2B' Second layer film heater 2C, 2C' 3rd layer film heater 20 Power connection terminal 21 Connection cord 22 Connection piece 3 Heat pipe body 3A Minimum pipe body 3B Intermediate pipe body 3C Maximum pipe body 3X central heat pipe body 3Y Interposed pipe body 3' Box body 3A' Smallest box body 3B' Middle box body 3C' Maximum box body 3X' Center Box Body 30 Heat receiver 30a Inside surface 30b External surface 32 Convex 33 Mountain-shaped convex part 4 Hollow interior 5 Fin 50 Mounting piece 6 Mountain-shaped protrusion 7 Holding member 8 Through holes 9 cold air 10. Warm Air 11 Volts 12 Nut 13 Air outlet A Fan b. Electric heater (heater) c Thermostat d. Thermal fuse S Hair dryer

Claims

1. A heat sink for a household dryer having a heating element and a motor, (a) the heat sink is a cylindrical heat pipe body having a hollow interior and a flat heat receiving portion, and a plurality of fins for radiating heat by thermal conduction from the heat generating portion are connected in an axial direction in an upright state to the inner surface and / or the outer surface of the cylindrical heat pipe body, (b) a heat pipe body having a plurality of fins of different sizes is arranged in a stacked manner; (c) the heat generating element is a film heater, and the film heater has a multi-layer structure in which it is sandwiched between the heat pipe bodies and in contact with the heat receiving portion; (d) The air blown by the operation of the motor is configured such that cold air is blown out from the hollow interior of the smallest heat pipe body having the fins, and hot air is blown out from the gaps between the fins of the heat pipe body heated by the film heater, and the cold air and the hot air are simultaneously irradiated to the object to be dried in two different temperature ranges that are less likely to be damaged by the hot air; The multi-layered heat sink for a household drying appliance is characterized by the above.

2. A heat sink for a household dryer having a heating element and a motor, (a) the heat sink is a box-shaped heat box body having a hollow interior and a flat heat receiving portion, and a plurality of fins for radiating heat by thermal conduction from the heat generating portion are connected in an axial direction in an upright state to the inner surface and / or the outer surface of the heat box body; (b) a plurality of heat box bodies having the fins of different sizes are arranged in a stacked manner; (c) the heat generating element is a film heater, and the film heater has a multi-layer structure that is sandwiched between the heat box bodies and is in contact with the heat receiving portion; (d) The air blown by the operation of the motor is configured such that cold air is blown out from the hollow interior of the smallest heat box body having the fins, and hot air is blown out from the gaps between the fins of the heat box body heated by the film heater, and the cold air and the hot air are simultaneously irradiated to the object to be dried in two different temperature ranges that are less likely to be damaged by the hot air. The multi-layered heat sink for a household drying appliance is characterized by the above.

3. 3. The multi-layer heat sink for a household drying appliance according to claim 1 or 2, characterized in that a central pipe body or central box body without fins is arranged inside the smallest heat pipe body or heat box body having fins.

4. 3. A multi-layer heat sink for a household drying appliance as described in claim 1 or 2, characterized in that an intervening pipe body or intervening box body without fins is disposed between adjacent heat pipe bodies or heat box bodies having fins, and the film heater is mounted by being sandwiched inside or outside the intervening pipe body or intervening box body.

5. 4. The multi-layer heat sink for a household drying appliance according to claim 3, wherein the heat pipe body or heat box body equipped with the film heater is maintained at 100°C or higher, and the hollow interior of the central pipe body or central box body without fins is maintained at 40°C or lower.

6. The heat pipe body having fins comprises a smallest pipe body having a small diameter, one or more intermediate pipe bodies having a medium diameter disposed on the outer surface of the smallest pipe body, and a largest pipe body having a largest diameter disposed on the outer surface of the intermediate pipe body, The film heater attached to the largest pipe body has the largest area and can generate high temperature, the film heater attached to the intermediate pipe body can generate medium temperature, and the film heater attached to the smallest pipe body can generate low temperature, 2. The heat sink for a multi-layered household dryer according to claim 1, wherein each of the film heaters is selected simultaneously to irradiate different temperatures onto the object to be dried at one time, or each of the film heaters is selected independently to irradiate a desired temperature onto the object to be dried.

7. The heat box body having the fins comprises a minimum box body, one or more intermediate box bodies disposed on the outer surface of the minimum box body, and a maximum box body disposed on the outer surface of the intermediate box body, The film heater installed in the largest box body has the largest area and can generate high temperature, the film heater installed in the middle box body can generate medium temperature, and the film heater installed in the smallest box body can generate low temperature, 3. The heat sink for a multi-layered household dryer according to claim 2, wherein each of the film heaters is selected simultaneously to irradiate different temperatures onto the object to be dried at the same time, or each of the film heaters is selected independently to irradiate a desired temperature onto the object to be dried.

8. 8. The multi-layered heat sink for a domestic drying appliance according to claim 1, 2, 6 or 7, wherein the heat emitted from each layer of the multi-layered film heater is constant.

9. 3. The multi-layer heat sink for a household drying appliance according to claim 1 or 2, characterized in that the smallest heat pipe body or heat box body having fins is large and has a short overall axial length so that heat dissipation from the heating side and the cooling side is fast.

10. The heat pipe body or heat box body having the fins has the convex fins for rectifying air standing at intervals of about 1.2 mm to 2.5 mm on the inner surface and / or outer surface of a metal plate, stainless steel plate, or aluminum plate that has been subjected to reversible insulating processing and is thinned to about 0.3 mm to 0.4 mm, 3. The multi-layer heat sink for a household drying appliance according to claim 1 or 2, wherein the film heater is a planar heating element having high heat dissipation efficiency on the heating side and the cooling side, reduced frictional resistance, and reversibility.

11. The multi-layered heat sink for a household drying appliance according to claim 1, 2 or 6, characterized in that the fins are made of aluminum or stainless steel that has been subjected to insulation processing and terahertz radiation processing, and are formed in a wall-type upright shape, a streamlined upright shape or a twisted upright shape.

12. The multi-layer heat sink for a household drying appliance according to claim 11, characterized in that the insulating and terahertz radiation treatments of the fins are performed by applying a heat-resistant resin paint mixed with silica that emits terahertz waves.

13. 8. A multi-layer heat sink for a household drying appliance as described in claim 1, 2, 6 or 7, characterized in that a mortar-shaped squeezer section with an open bottom is provided at the outlet of the heat pipe body or heat box body having the fins, and the cold air is irradiated in a concentrated manner onto the object to be dried.

14. 3. The multi-layer heat sink for a household drying appliance according to claim 1 or 2, wherein the household drying appliance to which the heat sink is provided is a hair dryer, a futon dryer, a clothes drying hanger, or a shoe dryer.

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