KR20210085079A - Hot air fan with high heat efficiency using pipe - Google Patents

Abstract

A hot air fan of the present invention includes a hot air fan body formed into a body having a predetermined space to introduce air from the outside and discharge the air to the outside by heating the air. The hot air fan body includes: a hot air generation room including at least one ceramic heating element to generate hot air; an outlet connected to the front end of the hot air generation room to discharge the hot air generated from the hot air generation room to the outside; an air supply room introducing air from the outside to supply the same to the hot air generation room; and an air introduction pipe which is formed into a bent pipe shape connected from an upper part of the hot air generation room to the air supply room via the hot air generation room, to which heat is conducted by the hot air generation room, and which introduces air from the outside to supply the same to the air supply room. In accordance with an embodiment of the present invention, when the air is introduced from the outside, the air is primarily heated in the pipe, and then, secondarily, a heating wire is led through the inside of a ceramic heating element made of silicon carbide and boron nitride, and a heat source radiated by the heating wire is emitted as radiant energy and the air blown by an air blower is heat-exchanged by the radiant energy, and as a result, hot air can be discharged to the outside.

Description

Hot air fan with high heat efficiency using pipe

The present invention relates to a hot air blower with increased thermal efficiency using a pipe, and more particularly, when air is introduced from the outside, firstly heating it in the pipe and then secondarily heating the heating wire inside the ceramic heating element made of silicon carbide and boron nitride. It relates to a hot air blower that passes through, emits a heat source heated by a hot wire as radiant energy, and heats up the air blown by the blower by heat exchange by radiant energy to discharge the hot air to the outside.

The content described below merely provides background information related to the present invention and does not constitute the prior art.

In general, a house for growing crops, such as a glass greenhouse or a plastic greenhouse, is installed to grow gardening or fruit trees in spring, autumn, and winter when the outside temperature is low, and heating is essential for an appropriate indoor temperature.

The conventional house for growing crops blows hot air heated by a boiler to the inside of the house through a ventilation duct installed on the floor inside the house to heat the inside, or water rapidly heated by a boiler is installed inside the house. The method of heating the indoor air by supplying it to the heating part was taken.

Conventional house heating devices are not easy to install and move a combustion boiler, and their configuration is complicated, so the overall size of the device is enlarged, and since oil is used as a raw material, the operating cost per area is high, and due to the nature of the boiler, the inside of the house There was a problem of wasting energy and lowering thermal efficiency due to air heating.

The heating system using such oil has a disadvantage in that soot is generated, and in view of the present era of high oil prices, there is a problem that energy is wasted heavily and causes unnecessary expenditure.

In the case of using a chrome heater instead of a boiler, the conventional house heating device generates direct heat, so a strong blower must be used to expand the heating area. could not be used for

In order to solve such a problem, the present applicant has applied for and registered the Republic of Korea Patent Registration No. 10-1667624.

However, this prior art was slightly lacking in thermal efficiency because it was directly heated by introducing external air.

Republic of Korea Patent Registration No. 10-1667624

The problem to be solved by the present invention is to solve the above problems, and when air is introduced from the outside, it is first heated in a pipe, and then a heating wire is passed through the inside of a ceramic heating element made of silicon carbide and boron nitride and secondarily, , to provide a hot air blower for discharging the heat source generated by the hot wire as radiant energy and heat exchange between the air blown by the blower and the radiant energy to discharge the hot air to the outside.

In addition, the problem to be solved by the present invention is to solve the above problems, using electricity as a clean fuel, applying a ceramic heat dissipation material to maximize the heat dissipation of the ceramic, and having a high thermal efficiency of 80 to 90% or more. to provide a fan.

To this end, the hot air blower with increased thermal efficiency by using the pipe according to the present invention,

It consists of a cylindrical body of a certain space and includes a hot air main body that introduces air from the outside, heats the air and discharges it to the outside,

The hot air body is

a hot air generating chamber provided with one or more ceramic heating elements to generate hot air;

an outlet communicating with the front end of the hot air generating chamber and discharging the hot air generated in the hot air generating chamber to the outside;

an air supply chamber for introducing external air and supplying it to the hot air generating chamber;

It is formed in the shape of a curved pipe extending from the upper part of the hot air generating chamber through the hot air generating chamber to the air supply chamber, heat is conducted by the hot air generating chamber, and external air is introduced and delivered to the air supply chamber. Includes pipe.

The air inlet pipe is a metal material, characterized in that the heat of the ceramic heating element is conducted.

In the air inlet pipe, while the air introduced from the outside is transferred to the air supply chamber, it is characterized in that it is primarily heated by the heat of the hot air generating chamber.

In the hot air generating chamber, the ceramic heating element is characterized in that the primary heated air is heated secondary to generate hot air.

The air supply chamber,

A portion of the hot air body forms a certain space, has a rectangular parallelepiped shape, and a blower is provided therein.

The blower communicates with the rear end of the hot air generating chamber to introduce external air through the air inlet passage to supply the hot air to the hot air generating chamber, and a control device for controlling on/off of the power of the ceramic heating element is provided.

The blower has a left through hole and a right through hole in the left and right directions, and a discharge hole is formed in a direction perpendicular to the left through hole and the right through hole,

The control device is electrically connected to a first temperature sensor installed in a space on one side of the outlet and a second temperature sensor installed on one side of the inside of the hot air generating chamber, and detects the sensing value of the first temperature sensor and compares it with a preset reference value After that, the output of the blower is adjusted to control the temperature of the exhaust air.

The ceramic heating element has both ends open and has a constant length in the form of a cylinder having an inside thereof, closed at both ends with a power supply member connected to a power supply line, and passes through a chrome heating wire inside to each power supply member and One or more heating rods electrically connected are formed.

The hot air generating chamber is separated from the outlet by a first double diaphragm having a first circular hole in the center, two ceramic heating elements are installed in series, and the hot air main body is partitioned in the cylindrical body of the predetermined space, and the air supply chamber , the hot air generating chamber and the outlet are formed, and the heating rod is coated with a boron nitride paint to a thickness of 20 to 50 μm on the inner edge and the outer edge, and a cylindrical shape of silicon carbide, boron nitride, and graphite powder. It is formed by powder processing and compression molding by a ball mill method.

The ceramic heating element is coupled to the power supply member on an open surface of a support having a circular groove into which both ends of a pair of heating rods in the longitudinal direction are inserted, and both ends of the heating rod passing through the circular groove of each support. and a unit heating element electrically connected to the power supply member by penetrating the heating wire inside the heating rod, and a flat bottom plate and a vertical bar erected vertically on the bottom plate are spaced apart by a certain distance to form a pair , A frame in which a plurality of horizontal bars connecting between the spaced vertical bars are vertically coupled between the spaced vertical bars at a predetermined interval, and a plurality of the unit heating elements as a holder for each horizontal bar formed in the frame. Mount it.

One or more negative ion generators are installed in a space on one side of the outlet.

The left through-hole and the right through-hole combine the first air amplifying member and the second air amplifying member to facilitate the inflow of air, and the first air amplifying member and the second air amplifying member are opened at both sides and have inlets It is a housing of a type that gradually narrows from the inner diameter of the housing, then the inner diameter of the middle part is the minimum, and the inner diameter becomes wider as it goes to the outlet.

The outlet is opened on both sides on the inside and gradually narrows from the inner diameter of the inlet, the inner diameter of the middle portion is the minimum, and the inner diameter of the outlet becomes wider as it goes back to the outlet. At the edge of the position where the inner diameter of the housing is the minimum Forming a vent through which air is introduced, a motor is coupled to an outlet portion of the housing by a shaft and includes a plurality of blades rotated by the operation of the motor.

The blower consists of a motor and an impeller accommodated in a housing of a predetermined space, an exhaust hole for discharging air is formed on one side of the upper surface of the housing, and coupled to the motor shaft of the motor to suck and transport air, A noise attenuator that is connected to the through hole on the other surface to reduce noise is combined,

The noise attenuator has a left through hole and a right through hole in the left and right directions, and a first sound absorbing material is formed around an air inlet through which air is introduced through the left through hole and the right through hole, and from the air inlet to the through hole. A connected air outlet is formed and a second sound absorbing material is formed around the air outlet.

In the heating rod, in addition to the silicon carbide (SIC), the boron nitride (BN), and the graphite powder, one or more C-SiC, SiSiC, and SSiC synthesized with biotite powder, aluminum nitride, and carbon are blended.

In the embodiment of the present invention, when air is introduced from the outside, after heating in the pipe first, the heating wire is passed through the inside of the ceramic heating element made of silicon carbide and boron nitride, and the heat source generated by the heating wire is radiant energy It is possible to provide a hot air blower for discharging hot air to the outside by heat-exchanging the air blown by the blower by radiant energy.

In addition, in an embodiment of the present invention, it is possible to provide a hot air fan having a high thermal efficiency of 80 to 90% or more, using electricity as a clean fuel, applying a ceramic heat dissipation material to maximize the heat dissipation of the ceramic.

1 is a view showing the appearance of a hot air blower according to an embodiment of the present invention.
2 is a view showing a state in which one side of the hot air fan according to an embodiment of the present invention is opened.
3 is a view showing the inside of the side of the hot air blower according to an embodiment of the present invention.
4 is an exploded perspective view showing the configuration of a unit heating element according to an embodiment of the present invention.
5 and 6 are perspective views illustrating the appearance of a ceramic heating element according to an embodiment of the present invention.
7 is a view showing a blower according to an embodiment of the present invention.
8 is a view showing an outlet according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

In the whole, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

1 is a view showing the appearance of a hot air blower according to an embodiment of the present invention, FIG. 2 is a view showing a state in which one side of the hot air fan is opened according to an embodiment of the present invention, and FIG. 3 is a view showing the appearance of the hot air fan according to an embodiment of the present invention It is a view showing the inside of the side of the hot air blower, FIG. 4 is an exploded perspective view showing the configuration of a unit heating element according to an embodiment of the present invention, and FIGS. 5 and 6 are perspective views showing the appearance of a ceramic heating element according to an embodiment of the present invention , Figure 7 is a view showing a blower according to another embodiment of the present invention.

1, the hot air blower 100 according to the embodiment of the present invention is provided with a hot air main body 102 made of a rectangular cylindrical body, and a ceramic heating element 110 as a hot air generating means inside the hot air main body 102. A control device (not shown) for controlling the on/off of the power of the ceramic heating element 110 is provided in the hot air generating chamber 104 and the hot air main body 102, and the hot air generating chamber 104 by sucking external air. Includes an air supply chamber 106 for supplying to the.

The hot air body 102 includes an air supply chamber 106 that sucks in external air by the blower 130, and a hot air generating chamber in which the air sucked from the air supply chamber 106 is converted into hot air by the ceramic heating element 110 ( 104) and an outlet 108 for discharging the hot air generated from the hot air generating chamber 104 to the outside.

At least one negative ion generator (not shown) with a built-in battery is installed in a space on one side of the outlet 108 . The negative ion generator is exemplified as having a built-in battery, but is not limited thereto, and a method of applying AC or DC power is also possible.

After passing through the upper part of the hot air generating chamber, the air inlet pipe 160 is curved again in a citron shape, then bends downward, descends vertically between the ceramic heating elements, and then is curved again in the direction of the air supply chamber.

In the air inlet pipe 160 , when the ceramic heating element heat is conducted to the air inlet pipe 160 and external air is introduced through the inlet 161 , the heat is first heated and transferred to the blower.

If necessary, the inside of the air inlet pipe 160 forms a Bernoulli tube or Venturi tube in which the inner diameter of the middle part is the minimum than the inlet and the outlet, that is, gradually narrows at the inner diameter of the inlet. It is formed in a form that the inner diameter becomes wider as it goes on, so that the movement speed can be accelerated by the Coanda effect and the Bernoulli principle.

In addition, the inner surface of the air inlet pipe 160 may have a screw thread formed at an angle so that air flowing in from the outside may cause a whirlwind.

Although the hot air blower 100 is manufactured using a metal material, when a natural material such as wood or paper is attached around the outlet 108, a large amount of negative ions can be discharged than when the outlet 108 is made of a metal material. Do.

When the negative ion generator 109 is operated, the outlet 108 receives power from the battery therein, generates negative ions by an internal electrical action, and discharges hot air converted by negative ions.

The negative ion generator emits electrons directly into the air by applying a high pulsed voltage to the sharp needle-shaped negative electrode (pulse method). Electrons emitted into the air combine with surrounding oxygen or moisture to form negative ions. A large amount of negative ions allows agricultural products and aquatic products to be naturally dried without browning.

The hot air generating chamber 104 is separated from the outlet 108 by a first double diaphragm 107 having a first circular hole 107a in the center thereof.

In the hot air generating chamber 104, two ceramic heating elements 110 are installed in series.

Referring to FIG. 5 , the ceramic heating element 110 has a heating rod 111 having a predetermined length in the form of a cylinder through which the inside is penetrated, and a circular groove into which both ends of the pair of heating rods 111 are inserted. To form a power supply member 114 coupled to the support 112 and the open surface of both ends of the heating rod 111 passing through the circular groove of each support 112 and to which the power supply line 115 is connected A plurality of unit heating elements 117 are stacked. Here, the support 112 is formed to a certain thickness and can be separated up and down, and each of the separated upper support 112a and lower support 112b is formed with a pair of hemispherical grooves 113 and is circular when combined. It is configured to form a pair of grooves.

In other words, the ceramic heating element 110 includes a bottom plate 120 , a first frame 121 , a second frame 124 , and a heating rod 111 , and includes a first frame 121 spaced apart from each other by a predetermined distance. A plurality of unit heating elements 117 are mounted on the second frame 124 .

The heating rod 111 has both open ends closed by the power supply member 114 to which the power supply line 115 is connected, respectively, the chrome heating wire is connected to the inside of the power supply member 114 on one side to the heating rod 111. It is electrically connected to the inside of the power supply member 114 of the other side through the inside of the cylinder.

The first frame 121 is formed as a pair of first vertical bars 122 vertically erected on the flat bottom plate 120 spaced apart by a predetermined distance, and connects the spaced first vertical bars 122 to each other. A plurality of first horizontal bars 123 are coupled up and down at regular intervals.

The second frame 124 is formed as a pair of second vertical bars 125 vertically erected on the flat bottom plate 120 spaced apart from each other by a predetermined distance, and connects between the second vertical bars 125 spaced apart from each other. A plurality of second horizontal bars 126 are coupled up and down at regular intervals.

On the upper surface of the first horizontal bar 123 and the upper surface of the second horizontal bar 126, the lower surface of each support 112 of the unit heating element 117 is mounted, and the unit heating element including the heating rod 111 ( 117) is mounted horizontally.

The unit heating element 117 is seated on the first horizontal bar 123 and the second horizontal bar 126 .

Each of the heating rods 111 is formed by mixing, molding, and drying a material having excellent heat transfer power, and firing at a high temperature of 1800-2200 ° C., and applying boron nitride paint with excellent heat transfer power to the inner edge and outer edge of about 20 to 50 μm After coating to a thickness, heat treatment at 100-150℃ for 20 minutes is completed.

Here, the heating rod 111 may use a material having excellent heat transfer ability, and is made of silicon carbide (SIC), boron nitride (BN), and graphite powder.

In addition, the heating rod 111 may include silicon carbide (SIC), boron nitride (BN), and graphite powder, plus one or more C-SiC, SiSiC, and SSiC synthesized with biotite powder, aluminum nitride, and carbon. In addition, the heating rod 111 may include a non-oxide material having excellent heat transfer ability, such as TiB, ZrB, TiC, B4C, AIN, ,Di3N4, MoSi, AlON, Ti2SiC2, SiAlON, and the like.

In other words, the heating rod 111 powder-processes the raw materials of silicon carbide, boron nitride, and graphite powder in a ball mill method, mixes the raw materials, compresses them, dries them, and then performs high-temperature thermal firing (1800-2200 ℃), the inner surface Coat the rim and the outer rim with boron nitride paint. Then, the heating rod 111 is fastened to the power supply member 114 that is fastened to both ends by penetrating the chrome heating wire inward because the inside of the cylindrical shape is empty and both ends are open.

Boron nitride is a material with excellent thermal superiority, electrical insulation, chemical stability, light weight and machinability.

The heating rod 111 may block the occurrence of an electric short due to the iron (Fe) component contained in a trace amount due to the boron nitride coated on the inner edge and the outer edge.

In the hot air blower 100 of the present invention, when electricity is applied to the chrome heating wire, the heating energy of the chrome heating wire is rapidly transferred to the outside of the heating rod 111 , and the heat source is discharged to the outside by the blower 130 for heating.

The ceramic heating element 110 may perform a far-infrared radiation function with a latent heat function due to the material of the heating rod 111 , thereby emitting far-infrared radiation energy from the heat source heated from the inside by the chrome heating wire to the outside.

The air supply chamber 106 is separated from the hot air generating chamber 104 by a second double diaphragm 132 having a second circular hole 131 in the center thereof.

A blower 130 is disposed in the air supply chamber 106 .

Referring to FIG. 7 , the blower 130 has a left through hole 133 and a right through hole 134 in the left and right directions, and the left through hole 133 and the right through hole 134 and the discharge hole in the vertical direction ( 135) is formed. A rear hole 136 is formed as needed.

The air supply chamber 106 communicates with the air inlet passage 160 at the top of the hot air main body 102 through the air inlet hole 161 .

And the lower portion of the air inlet passage 160 is made of a metal material with good heat conduction and easily radiates the heat of the ceramic heating element 110 and primarily heats the air inside.

The blower 130 introduces air through the left through-hole 133, the right through-hole 134, and the rear hole 136 formed in the left and right directions and discharges it to the discharge hole 135,

Inside the air supply chamber 106, it is electrically connected to the power supply line 115 of the power supply member 114 to supply power of the positive and negative poles, and a first temperature sensor installed in a space on one side of the outlet 108, generating hot air. A control device is installed that is electrically connected to the second temperature sensor installed on one side of the inner side of the chamber 104 to sense the control value of the sensor.

The control device may be electrically connected to a temperature sensor installed inside the house for growing crops that is not mounted inside the hot air fan 100 .

The control device supplies power from the power supply line 115 to perform a power on/off function, and after sensing the first temperature sensor and comparing it with a preset reference value, if it is determined that the temperature of the air discharged from the hot air fan 100 is low, The output of the blower 130 is strongly adjusted, and when it is determined that the temperature is high, the output of the blower 130 is weakly adjusted to control the temperature of the exhaust air.

The control device determines the temperature sensed from the temperature sensor installed inside the house for crop cultivation is a preset reference value, turns the power of the power supply line 115 on and off, and controls the output of the blower 130 to adjust the amount of external air inflow. have.

The control device uses a temperature sensor, a first temperature sensor, and a second temperature sensor installed in the house for growing crops to display the internal temperature of the hot air fan 100, the internal temperature of the house, and the temperature at the output terminal of the hot air fan 100 ( not shown) can be displayed.

8 is a view showing an outlet according to another embodiment of the present invention.

As shown in FIG. 8 , the outlet 108 amplifies the discharge of the hot air generated in the hot air generating chamber 104 by installing an amplifying device therein.

The amplification device is in the form of a Bernoulli tube or Venturi tube with both sides open and the inner diameter of the middle part is the minimum than the inlet and outlet, that is, the inner diameter of the middle part becomes the minimum, and the inner diameter becomes wider as it goes to the outlet. A vent 301 through which air is introduced is formed at the edge of the housing 300 in the form of the housing 300 and the position where the inner diameter of the housing 300 is minimized. The vent 301 is spaced or fixed by the vent pins 302 arranged at equal intervals.

The outer hole 108a is connected to the vent 301 of the housing 300 by having a portion of the outlet 108 drilled therein.

External air is introduced into the housing 300 through the external hole (108a).

The hot air generated by the hot air blower 100 flows along the inner surface of the housing 300 as the moving speed is accelerated by the Coanda effect and the Bernoulli principle. It causes the inflow of air to amplify the air flow.

In the amplification device, a motor 310 is coupled by a shaft to the outlet side, and a plurality of blades 312 that are rotated by the operation of the motor 310 are mounted, and the hot air passing through the housing 300 rotates the blades 312 . As the air volume increases, it is discharged as it spreads. Here, the motor 310 is supported by the support member 314 coupled to the inner surface of the housing 300 and connected to one side of the motor 310 .

In the present invention, external air is introduced into the air inlet pipe 160 through the inlet 161 and then is first heated and then delivered to the air supply chamber.

At this time, the air inlet pipe 160 is formed by passing through the upper part of the hot air generating chamber, bending again in a citron shape, and then bending downward, descending vertically between the ceramic heating elements, and then bending again in the direction of the air supply chamber.

Accordingly, when the heat of the ceramic heating element is conducted to the air inlet pipe 160 and the external air flows in through the inlet 161, the air inlet pipe 160 is first heated and delivered to the air supply chamber.

If necessary, the inside of the air inlet pipe 160 forms a Bernoulli tube or Venturi tube in which the inner diameter of the middle part is the minimum than the inlet and the outlet, that is, gradually narrows at the inner diameter of the inlet. It is formed in a form that the inner diameter becomes wider as it goes on, so that the movement speed can be accelerated by the Coanda effect and the Bernoulli principle.

In addition, the inner surface of the air inlet pipe 160 may have a screw thread formed at an angle so that the air introduced from the outside causes a tornado.

Then, the primary heated air introduced into the air supply chamber 106 is introduced into the inside through the left through hole 133, the right through hole 134 and the rear hole 136 in the left and right directions of the blower 130. After the exhaust hole 135 is supplied to the hot air generating chamber (104).

Then, secondary heating is performed by the ceramic heating element 104 of the hot air generating chamber 104 . At this time, since the primary heated air flows into the hot air generating chamber 104, the temperature can be quickly increased, so the thermal efficiency is much higher.

And the secondary heated air is discharged by the outlet (108).

Here, the control device is electrically connected to a temperature sensor installed inside the house for growing crops that is not mounted inside the hot air blower 100, detects the sensing value of the temperature sensor, compares it with a preset reference value, and then adjusts the output of the blower Thus, the temperature of the exhaust air can be controlled.

In the above embodiment of the present invention, when air is introduced from the outside, it is first heated in the air inlet pipe, and then the heating wire is passed through the inside of the ceramic heating element made of silicon carbide and boron nitride and the heat source heated by the heating wire is secondarily heated. It is emitted as radiant energy, and heat exchanged with the air blown by the blower is made by radiant energy, so that hot air can be discharged to the outside.

In addition, in an embodiment of the present invention, electricity as a clean fuel is used, and a ceramic heat dissipation material is applied to maximize the heat dissipation of the ceramic, and has a high thermal efficiency of 80 to 90% or more.

In addition, in the embodiment of the present invention, high-efficiency thermal calorie production is possible with the lowest electricity use, the failure rate is low, the installation is simple, the operation is simple, so it is convenient to use, and in the case of agriculture, it is possible to use it in four seasons .

As described above with respect to specific embodiments of the present invention, the spirit and scope of the present invention are not limited to these specific embodiments, but various modifications and variations are possible without changing the gist of the present invention. It will be understood by those of ordinary skill in the art to which the present invention pertains.

Accordingly, since the embodiments described above are provided to fully inform those of ordinary skill in the art to which the present invention belongs the scope of the invention, it should be understood that they are exemplary in all respects and not limiting, The invention is only defined by the scope of the claims.

Claims (7)

It consists of a cylindrical body of a certain space and includes a hot air main body that introduces air from the outside and heats the air and discharges it to the outside,
The hot air body is
a hot air generating chamber provided with one or more ceramic heating elements to generate hot air;
an outlet communicating with the front end of the hot air generating chamber to discharge the hot air generated in the hot air generating chamber to the outside;
an air supply chamber for introducing external air and supplying it to the hot air generating chamber;
It is formed in the shape of a curved pipe extending from the upper part of the hot air generating chamber to the air supply chamber through the hot air generating chamber, heat is conducted by the hot air generating chamber, and external air is introduced and delivered to the air supply chamber. A hot air fan with increased thermal efficiency by using a pipe including a pipe. According to claim 1,
The air inlet pipe is made of a metal material and the heat of the ceramic heating element is conducted using a pipe to increase thermal efficiency. 3. The method of claim 2,
In the air inlet pipe, while the air introduced from the outside is transferred to the air supply chamber, the hot air fan with improved thermal efficiency by using a pipe, characterized in that it is primarily heated by the heat of the hot air generating chamber. 4. The method of claim 3,
A hot air fan with improved thermal efficiency using a pipe, characterized in that the ceramic heating element in the hot air generating chamber generates hot air by secondarily heating the firstly heated air. 5. The method of claim 4,
The air supply chamber,
A hot air blower that forms a certain space as a part of the hot air main body, has a rectangular parallelepiped shape, and uses a pipe having a blower therein to increase thermal efficiency. 6. The method of claim 5,
The blower communicates with the rear end of the hot air generating chamber, introduces external air through the air inlet passage, supplies the hot air to the hot air generating chamber, and uses a pipe provided with a control device for controlling on/off of the power of the ceramic heating element. A hot fan with improved thermal efficiency. 7. The method of claim 6,
The blower has a left through hole and a right through hole in the left and right directions, and a discharge hole is formed in a direction perpendicular to the left through hole and the right through hole,
The control device is electrically connected to a first temperature sensor installed in a space on one side of the outlet, and a second temperature sensor installed on one side of the inside of the hot air generating chamber, and detects a sensing value of the first temperature sensor to obtain a preset reference value and After comparison, a hot air blower with increased thermal efficiency by using a pipe that controls the temperature of exhaust air by adjusting the output of the blower.

Images