Hot air generating device comprising heat-generating blade

Abstract

The present invention relates to a hot air generating device and, more specifically, to a hot air generating device comprising: a hollow shaft which is formed in a cylindrical shape having open front and rear sides, and rotates inside a body; and a heat-generating blade which is formed between the hollow shaft and a housing surrounding the hollow shaft, and is directly heated by means of induction heating.

Description

A hot air generating device including a heating blade

[0001] The present invention relates to a hot air generating device, and more specifically, to a hot air generating device that discharges hot air directly heated by heat-generating blades.

[0002] Conventional hot air generators rotate blades and place heaters along the path of the resulting airflow. Consequently, the generated airflow is subject to interference from the heater, weakening it and generating significant noise.

[0003] To reduce interference, the heater's volume is reduced. This reduces the area in contact with the air, forcing the heater to generate higher temperatures. Such high temperatures complicate the device's structure and can also pose safety risks.

[0004] There is also a problem that a significant portion of the input power is lost due to the low heating efficiency of the heater.

[0005] Meanwhile, these hot air generating devices are commonly used in hair dryers.

[0006] Consumer interest in beauty and maintaining healthy hair has been increasing recently, and in response to this trend, advanced hair dryers are being developed and released on the market.

[0007] However, these products still have the above-mentioned problems because the heater is placed on the airflow formed and discharged from the wings.

[0008] There is a need to develop new devices that can solve these problems.

[0009] The technical problem to be solved by the present invention is to provide a hot air generating device that can eliminate interference in the airflow path by removing a heater that blocks the airflow path, and reduce power consumption by increasing the heating efficiency of the heating part.

[0010] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0011] According to one embodiment of the present invention, a hot air generating device including a heating blade includes a body and a hollow shaft formed in a cylindrical shape with the front and rear sides open and rotating inside the body, and a blade formed at one end of an outer surface of the hollow shaft can generate heat.

[0012] In one or more embodiments, a rotor may be formed at the other end of the outer surface of the hollow shaft.

[0013] In one or more embodiments, the winding coil driving the rotor may be formed and fixed to the body in a shape that surrounds the rotor.

[0014] In one or more embodiments, the hollow shaft may include a housing that surrounds and engages the wing, wherein the hollow shaft and the housing may form a passage for a first airflow that is exhausted forward by the wing.

[0015] In one or more embodiments, the passage of the first airflow may be characterized as narrowing as it progresses forward.

[0016] In one or more embodiments, the inclined portion installed on the hollow shaft may be formed to be high at the rear and low at the front, and may be connected to a hole formed on the side of the body.

[0017] In one or more embodiments, an induction coil surrounding the housing may be formed and secured to the body.

[0018] In one or more embodiments, the wing is formed of a conductive metal and can be inductively heated by the induction coil.

[0019] In one or more embodiments, the device may further include a shielding member surrounding the induction coil.

[0020] In one or more embodiments, the hollow shaft or housing may be formed of a non-conductive material.

[0021] In one or more embodiments, a second airflow may be formed by the first airflow, which proceeds from the rear of the hollow shaft to the front.

[0022] In one or more embodiments, the body may further include a detachable portion formed in a funnel shape that is wide at the back and narrow at the front, surrounding the front end of the body.

[0023] According to the present invention, a hot air generating device including a heating blade can heat air at the contact surface of the blade without interfering with the generated air flow, and can also reduce power loss for heating.

[0024] The hot air generating device of the present invention can also generate strong, uninterrupted hot air by compressing and discharging the airflow generated from the wings, thereby drawing in and discharging the surrounding air through the Bernoulli effect.

[0025] FIG. 1 is a perspective view illustrating a hot air generating device according to one embodiment of the present invention.

[0026] Fig. 2 is a cutaway perspective view of the hot air generating device of Fig. 1.

[0027] Figure 3 illustrates a rotating part according to one embodiment of the present invention.

[0028] Figures 4a, 4b, 4c, and 4d illustrate airflow according to one embodiment of the present invention.

[0029] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0030] “And / or” includes each and every combination of one or more of the items mentioned.

[0031] The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations, and / or elements mentioned.

[0032] Additionally, throughout the specification, when a part is said to be "connected" to another part, this includes not only cases where it is "directly connected," but also cases where it is "indirectly" or "electrically connected" with other members or components in between.

[0033] Additionally, throughout the specification, the description that each layer (film), region, pattern or structure is formed "on" or "under" the substrate, each layer (film), region, pad or pattern includes both being formed directly or through the interposition of another layer. The criteria for being on / over or under / under each layer are explained based on the drawings.

[0034] Additionally, expressions such as 'first, second', etc. are used only to distinguish between multiple components, and do not limit the order or other characteristics between the components.

[0035] In addition, the flowcharts illustrated in the drawings are merely exemplary sequences for obtaining the most desirable results in carrying out the present invention, and it is obvious that other steps may be added or some steps may be deleted.

[0036] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0037] Hereinafter, a hot air generating device including a heating blade according to the present invention will be described with reference to the drawings.

[0038] The hot air generating device according to the present invention is a device for heating an object or space located in front by discharging hot air, and the direction toward the object or space is defined as the front, and the opposite direction is defined as the rear.

[0039] FIG. 1 is a perspective view of a hot air generating device according to an embodiment of the present invention, and FIG. 2 is a cutaway perspective view of the hot air generating device of FIG. 1.

[0040] The hot air generating device according to the present invention may be a hair dryer used for beauty and hair care.

[0041] Referring to FIGS. 1 and 2, a hot air generating device according to the present invention includes a body (500) and a hollow shaft (601) that rotates inside the body (500) in a cylindrical shape with the front and rear sides open, and a wing formed on a front end of an outer surface of the hollow shaft (601) can generate heat.

[0042] The hot air generating device according to the present invention can receive power from a power supply unit (100) to rotate the blades and generate heat at the same time.

[0043] At this time, power can be supplied wirelessly and the battery can be charged for use, and in this case, the hot air generator can be used wirelessly.

[0044] Referring to FIG. 2, a rotating part composed of a hollow shaft (601) and a configuration installed on the hollow shaft (601) can rotate inside the body (500).

[0045] The hollow shaft (601) is a long, cylindrical shape with open front and back, and a rotor (422) can be formed on the rear end of the outer surface of such a cylinder.

[0046] The above rotor (422) is formed of a magnet, and the winding coil (411) that drives the rotor (422) can be formed by being fixed to the body (500) in a shape that surrounds the rotor (422).

[0047] The rotor (422) can be fixedly installed by surrounding a hollow shaft (601) with a permanent magnet. A magnetic field formed by applying an alternating current to the winding coil (411) can rotate the rotor (422).

[0048] In this way, the hollow shaft (601), rotor (422) and winding coil (411) can operate as a motor.

[0049] A hollow shaft (601) according to one embodiment of the present invention performs the same role as a shaft of a motor.

[0050] In order for the hollow shaft (601) and the structure formed on the hollow shaft (601) to rotate smoothly inside the body (500), a first bearing (471) may be arranged at the rear end of the hollow shaft (601) and the middle of the body (500), a second bearing (472) may be arranged at the end of the inclined portion (620) and the middle of the body (500), and a third bearing (473) and a fourth bearing (474) may be arranged at both ends of the housing (613) and the middle of the body (500).

[0051] Figure 3 is a drawing showing a rotating part according to one embodiment of the present invention.

[0052] Referring to FIG. 3, a device according to one embodiment of the present invention includes a housing (613) that surrounds and is coupled to a wing (610), and the hollow shaft (601) and the housing (613) can form a passage for a first airflow generated forward by the wing (610).

[0053] A wing (610) can be formed on the outer surface of the hollow shaft (601), and the housing (613) is combined to surround the wing (610). That is, a structure is formed in which a cylinder with a large diameter is combined to surround a cylinder with a small diameter, and the wing fills the space formed between the two cylinders.

[0054] When the hollow shaft (601) rotates, the wing (610) can generate airflow forward.

[0055] The enlarged view of Fig. 3 shows a part of the hollow shaft (601) with wings (610) formed and the housing (613) separated, and in actual operation, they are assembled as one piece.

[0056] Referring to FIGS. 2 and 3, the hollow shaft (601) has an inclined portion (620) formed in a form in which the rear is high and the front is low, and this inclined portion can be connected to a hole (501) formed on the side of the body (500).

[0057] External air can be introduced into the interior through the opening (501) and can move forward guided by the inclined portion (620). In this way, the opening (501) and the inclined portion (620) can form a first intake port (210).

[0058] The passage of the first airflow may be characterized by narrowing as it progresses forward.

[0059] The diameter of the housing (613) is formed smaller at the location of the first exhaust port (310) where the first airflow is discharged to the outside than at the location of the first intake port (210) where the first airflow starts, so that the volume of air moving from the first intake port (210) to the first exhaust port (310) becomes smaller and smaller, and thus the air is compressed to an increasingly higher pressure, and thus the speed of the airflow becomes increasingly faster. The airflow compressed and accelerated in this way is discharged from the first exhaust port (310).

[0060] Referring to Fig. 2, an induction coil (560) surrounding a housing (613) can be formed by being fixed to the body (500). At this time, the wing (610) is formed of a conductive metal and can be inductively heated by the induction coil (560).

[0061] When a high-frequency alternating current is applied to the induction coil (560) surrounding the housing (613), a magnetic field is formed inside the housing (613), and when a conductive metal is placed within the formed magnetic field, the conductive metal can generate heat on its own. An induced current flows in the conductive metal due to the magnetic field formed by the high-frequency current, and this induced current generates Joule heat due to hysteresis loss caused by eddy currents generated within the metal, so that heat can be generated in a short period of time.

[0062] In this way, the wing (610) must be a conductive metal so that eddy current can be generated inside, and if it is a magnetic metal that can generate heat due to hysteresis loss, the amount of heat generated increases.

[0063] For example, the wing (610) can be formed of stainless steel.

[0064] Alternatively, it may be formed of a conductive metal having a magnetic property, such as Ni or an NI alloy, a Sus4 series, Fe, or an Fe+Cr alloy.

[0065] At this time, the high-frequency induced current is concentrated on the surface of the thin plate due to the skin effect, so it is preferable that the wing (610) according to one embodiment of the present invention be formed in the shape of a thin plate.

[0066] This type of induction heating has minimal heat loss, enables rapid heating, and reduces power consumption by concentrating power energy on the area where heat generation is required.

[0067] The wing (610) formed of a magnetic metal can generate heat by itself through induction heating. Since the wing (610) itself generates heat by directly contacting the air and generating air current, it is energy efficient and can quickly generate hot air.

[0068] In one or more embodiments, a shielding member (561) surrounding the induction coil (560) may be further included.

[0069] The above shielding member (561) is preferably a ferrite core with excellent electromagnetic wave blocking properties to prevent the magnetic field from being unnecessarily radiated and to concentrate the magnetic field toward the inside of the housing (613).

[0070] According to one embodiment of the present invention, the hollow shaft (601) or housing (613) may be formed of a non-conductive material. This is to prevent unnecessary heat generation that may occur when formed of a conductive material.

[0071] For example, high-strength plastics can be used.

[0072] The high-strength plastic can be, more specifically, one of the following materials: PI (Poly Imide), PMMA (Polymethyl methacrylate), and PC (Polycarbonate).

[0073] PI (Poly Imide) is a thin, highly flexible, high-performance industrial material that can withstand temperatures above 400°C and below -269°C. It also boasts strong chemical and abrasion resistance, making it widely used in applications requiring stable performance in harsh environments.

[0074] PMMA (Polymethyl methacrylate) is a transparent thermoplastic polymer, also known as acrylic or acrylic glass, and is widely used as a replacement for glass.

[0075] PC (Polycarbonate) is widely used as a component of electronic devices because it has the characteristics of good electrical insulation, dimensional stability, fire extinguishing properties, acid resistance, high weather resistance, and high impact resistance.

[0076] Referring again to FIG. 2, the hot air generating device according to the present invention may further include a detachable portion (530) formed in a funnel shape that is wide at the back and narrow at the front, surrounding the front end of the body (500).

[0077] The detachable part (530) can be added as an accessory to this device and installed or removed.

[0078] The wide part of the detachable part (530) can be operated as a third intake port (230), and the narrow part can be operated as a third exhaust port (330).

[0079] Below, the path through which airflow is formed and discharged is described.

[0080] FIGS. 4a, 4b, 4c, and 4d are drawings showing airflow according to one embodiment of the present invention, where FIG. 4a shows a first airflow, FIG. 4b shows a second airflow, FIG. 4c shows a third airflow, and FIG. 4d shows all of the first, second, and third airflows.

[0081] Referring to FIG. 4a, air drawn in from the first intake port (210) can be heated by the wing (610) and simultaneously advance forward to form a first airflow that is discharged through the first exhaust port (310).

[0082] Referring to Fig. 4b, the Bernoulli effect caused by the first airflow discharged at a high speed from the first exhaust port (310) can form a second airflow discharged from the second intake port (220) to the second exhaust port (310). The Bernoulli effect is that as the speed of the air increases, the surrounding pressure decreases, and the decreased pressure draws in the surrounding air.

[0083] Referring to Fig. 4c, due to the Bernoulli effect caused by the first air current discharged at a high speed from the first exhaust port (310), the air drawn in from the third intake port (230) can form a third air current discharged from the third exhaust port (330).

[0084] Referring to Fig. 4d, all air currents formed by the first, second, and third air currents can be confirmed.

[0085] As described above, the hot air generator according to the present invention can increase the power efficiency for heat generation by allowing the air to be heated at the contact surface of the wing without interference with the generated airflow by allowing the wing to generate heat itself through induction heating. Furthermore, by drawing in and discharging surrounding air through the Bernoulli effect that occurs when compressing and discharging the airflow generated from the wing, the device can discharge strong, uninterrupted hot air.

[0086] Although the present invention has been described as above, those skilled in the art will recognize that the present invention can be implemented in other forms while maintaining the technical spirit and essential features of the present invention.

[0087] The scope of the present invention will be fundamentally determined by the patent claims, but it should be interpreted that not only the configuration directly derived from the description of the patent claims, but also all changes or modified forms derived from equivalent configurations are included in the scope of the present invention.

Claims

body; A hollow shaft rotating inside the body; One or more wings formed on the outer surface of the hollow shaft; A rotor arranged on the outer surface of the hollow shaft; a housing that surrounds and connects the above wings; and An induction coil arranged around the housing and surrounding the housing; Including, A hot air generating device in which the blades generate heat by induction heating of the induction coil. In the first paragraph, The above hollow shaft is a hot air generating device having a cylindrical shape with open front and rear sides. In the second paragraph, A hot air generating device in which a winding coil driving the rotor is fixed to the body in a shape that surrounds the rotor. In the first paragraph, A hot air generating device in which the hollow shaft and the housing form a passage for a first airflow exhausted forward by the wings. In paragraph 4, A hot air generating device characterized in that the passage of the first air flow becomes narrower as it progresses forward. In paragraph 4, A hot air generating device further comprising an inclined portion formed on the outer surface of the hollow shaft in a form in which the rear is high and the front is low and connected to a hole formed on the side of the body. In paragraph 4, A hot air generating device in which the above induction coil is formed by being fixed to the body. In paragraph 7, A hot air generating device further comprising a shielding member surrounding the induction coil. In paragraph 4, A hot air generating device in which a second air current is formed by the first air current, which moves from the rear of the hollow shaft to the front.

Images