TW201518604A - Heat convention power generation system - Google Patents

Abstract

The invention relates to a heat convention power generation system. Primarily, it comprises a shell body, at least one lens, at least one metal mesh, a reclaimed water and rainwater recycling pipe, a wind and steam engine, and a battery. Wind of the natural resource is used in the present invention to enter the shell body through an inlet of the shell body and to combine with sunlight which projects to the metal mesh within the shell body through at least one lens, so that the metal mesh is heated. The steam is generated in the shell body by timely controlling the amount of the injected reclaimed water and rainwater provided by the reclaimed water and rainwater recycling pipe to assist the generation of a high speed heat convention for the surrounding air. It promotes the vanes of the wind and steam engine to operate, so that the coupled generator generates electricity to rapidly raise the convention speed within the shell body and effectively enhances the performance of the heat convention power generation system.

Description

Thermal convection power generation system

The invention relates to a heat convection power generation system, in particular to a heat energy provided by natural wind power combined with solar energy, and timely control of the water and rain water recovery pipe in the injection amount, and the heat convection is enhanced by the hot steam assisting. Efficiency, which in turn drives the thermal convection power generation system of wind and steam generators.

According to various factors such as the fluctuation of crude oil prices and the depletion of traditional energy sources and the safety concerns of nuclear power plants, the development of alternative green energy has become a top priority for all countries, including alternative energy sources such as wind power. Hydropower, geothermal heat, biodiesel, and solar cells are all highly regarded green energy sources. Among them, wind power is one of the most potential alternative energy sources. It is also an established policy for energy development in China and many countries. And development focus; however, wind power is still an unstable energy development system, mainly because the output voltage and power of wind turbines will change with the wind speed, so how to improve the overall wind turbine Stability and efficiency have always been one of the important issues that countries urgently need to solve.

In the past patents, there have been many studies to solve the problem of efficiency and stability of wind turbines. For example, the "heat convection power generation device" of the Republic of China Patent No. I353412 provides a wind power generation system, mainly utilizing natural resources. The thermal convection generated by the wind and the solar energy drives the rotor of the power generating device to rotate, so that the permanent magnet provided on the periphery of the rotor can interact with the induction coil in the stator to generate power, that is, the patent uses the reflector to reflect The sunlight is irradiated to the susceptor, so that the hot air space inside the pedestal generates hot air rise, and the hot air ignites the outside air from the air inlet at the bottom end of the susceptor to rise along with the hot gas, so that the hot air can push the rotor vane to rotate through the duct. The permanent magnet provided on the circumference of the rotor interacts with the stator induction coil to perform power generation; however, the patent uses a reflector to reflect sunlight to illuminate the outer surface of the susceptor, thereby generating hot air in the heat chamber space in the susceptor. To heat the metal mesh located in the space of the heat chamber, because the reflector is reversed The light is a uniform light, and the non-concentrated light source forms a smaller projection area to increase the heating efficiency of the metal mesh. Therefore, the patent can only heat the air temperature in the hot chamber space to about 100 ° C, which is not effective. Higher temperature air to accelerate the wind speed of the heat convection, which in turn accelerates the speed of the wind turbine, will greatly reduce the efficiency of the patented wind turbine; therefore, increase the temperature of the air in the hot chamber space, so that the wind enters from the air inlet It is the important issue that wind turbine generators or researchers need to continuously overcome and solve.

Nowadays, the inventor is considering the above-mentioned wind turbines because of the inability to effectively improve the temperature of the internal air and the wind speed of heat convection. It is a tireless spirit, and with its rich professional knowledge and years of practice. The experience was assisted and improved, and the present invention was developed based on this.

The main purpose of the present invention is to provide a thermal convection power generation system, in particular to a thermal energy provided by a combination of wind power using natural resources, and timely control of water and rainwater recovery pipes in the injection amount, which are assisted by hot steam. Thermal convection efficiency, which in turn drives the thermal convection power generation system of wind and steam generators. The advantage of this system is that it can quickly increase the temperature of the air in the chamber or assist the hot steam to accelerate the speed of heat convection and effectively improve the efficiency of the heat convection power generation system. .

In order to achieve the above-mentioned implementation object, the inventors propose a heat convection power generation system, which mainly uses a wind power combined with thermal energy provided by solar energy to generate heat convection and converts it into a power generation system, and the heat convection power generation system includes a casing, at least a lens, at least one metal mesh, a medium water and rainwater recovery pipe, a wind and steam engine, and a battery; the casing is provided with at least one air inlet near the bottom end, and the top end forms an angled tapered outlet end The side surface is provided with at least one first opening, wherein a hollow heat collecting tube is disposed inside the casing, and at least one second opening is disposed on a side of the hollow heat collecting tube to correspond to the first opening of the casing, and the second opening is correspondingly disposed to block a high temperature resistant lens that is emitted by the hot air; at least one lens surrounds the periphery of the housing and is correspondingly disposed at the first opening of the housing, and the sunlight is focused by the lens and is incident into the hollow heat collecting tube through the first opening and the second opening At least one metal mesh is disposed in the hollow heat collecting tube to receive sunlight incident through the lens; the middle water and rainwater recovery pipe system The rainwater or medium water recovered by a water recovery system is controlled to spray the amount onto the metal mesh to generate hot steam; the wind and steam system is disposed at the outlet end of the casing, and includes a rotating shaft and a heat set on the rotating shaft. a pair of blades that rotate the rotating shaft by convective wind, hot steam, and external wind, and a generator coupled to the rotating shaft; the battery is electrically connected to the generator of the wind and steam to store the electric power generated by the generator.

In the thermal convection power generation system as described above, the hollow heat collecting tube is a metal tube, and the metal material is formed from a material selected from the group consisting of a metal alloy and a heat collecting material.

A thermal convection power generation system as described above, wherein the lens is a Fresnel lens for collecting sunlight to form a smaller projected area.

In the thermal convection power generation system as described above, the material of the metal mesh is formed from a material selected from the group consisting of a metal alloy and a heat collecting material.

In the thermal convection power generation system as described above, the inside of the casing may further be provided with a convection duct having a hollow structure, and the bottom of the convection duct has a gas guiding passage which is screwed with the bottom end of the casing, and the periphery thereof is covered with a plurality of stomata. The top has an open end, and the convection duct has a downwardly tapered shape.

In the thermal convection power generation system as described above, the thermal convection power generation system may further provide a wind power generator near the battery, and the wind is used to cause the blades to rotate to generate electricity for storage in the battery.

In the thermal convection power generation system as described above, the air inlet of the casing further corresponds to a drainage fan group, so that the outside air operates through the fan to accelerate into the interior of the casing.

In the thermal convection power generation system as described above, a tripod can be further disposed at each corner of the bottom of the housing, the tripod is a high shell, and an air inlet is further disposed at the bottom of the housing, and a draft fan group is correspondingly disposed at the air inlet. The outside air is operated via a fan to accelerate into the interior of the housing.

Therefore, the present invention combines the heat energy provided by the solar energy with the natural resources to generate high-speed heat convection in the heat convection power generation system, thereby driving the generator to generate power, and then recovering the water or rain in time. Controlling the amount of injection water to generate hot steam on the staggered metal mesh in the cavity to accelerate the speed of heat convection and effectively improve the efficiency of the power generation system; in addition, the reflector is used to reflect uniform sunlight compared to the conventional heat convection power generation device. The invention is irradiated to the outer surface of the pedestal. The invention directly integrates the light source of the sun into a small projection area and is projected on the staggered metal mesh in the cavity by the fact that the Fresnel lens has the characteristics of shorter focal length and more light quantity. Agglomerating more thermal energy to obtain sufficient heat for the air passing through the metal plate to perform thermal convection to drive the generator; further, the present invention directly illuminates the sunlight through the lens by designing the first opening and the second opening To the interlaced metal mesh in the cavity, compared with the traditional thermal convection power generation device, the temperature of the air in the cavity can only be increased to 100 ° C. The temperature of the air in the chamber can be increased by more than 300 ° C, thereby generating a level of considerable wind power, and rapidly driving the blade group of the generator to improve the efficiency of wind power generation; finally, the shell of the present invention is at the exit angle of the top portion. The design of the tapered and sufficient length of the hollow heat collecting tube effectively increases the wind speed of the heat convection, and increases the rotation rate of the blade group of the generator to improve the power generation efficiency.

(1) ‧‧‧Shell

(11) ‧‧‧ inlet

(12) ‧‧‧export end

(13) ‧ ‧ first opening

(14) ‧‧‧Hollow heat collecting tubes

(141) ‧ ‧ second opening

(142)‧‧‧High temperature resistant lenses

(15) ‧ ‧ convection catheter

(151) ‧‧‧ air guiding channels

(152) ‧ ‧ stomata

(153) ‧‧‧Open end

(2) ‧ ‧ lens

(3)‧‧‧Metal net

(4) ‧‧‧Water and rainwater recovery pipes

(41) ‧‧‧Water recovery system

(5) ‧‧‧Wind and steam engines

(51)‧‧‧Face group

(52)‧‧‧Generator

(6) ‧‧‧Battery

(7) ‧‧‧ wind turbines

(8)‧‧‧Draining fan set

(9) ‧ ‧ street lights

First Figure: Overall cross-sectional view of a preferred embodiment of the thermal convection power generation system of the present invention

Second: Overall cross-sectional view of another preferred embodiment of the thermal convection power generation system of the present invention

Third: Schematic diagram of street lamp setting of a preferred embodiment of the thermal convection power generation system of the present invention

Fourth: Schematic diagram of wind turbine generator arrangement according to another preferred embodiment of the heat convection power generation system of the present invention

Figure 5 is a schematic diagram showing the arrangement of the draft fan group of another preferred embodiment of the heat convection power generation system of the present invention

The object of the present invention and its structural design and advantages will be apparent from the following detailed description of the preferred embodiments.

First, referring to the first figure, an overall cross-sectional view of a preferred embodiment of the thermal convection power generation system of the present invention, wherein the thermal convection power generation system of the present invention mainly utilizes wind energy combined with thermal energy provided by solar energy to generate heat. The convection and conversion to power generation system mainly includes:

a casing (1) is provided with at least one air inlet (11) on a side near the bottom end, the top end forming an angled tapered outlet end (12), and the side surface is provided with at least one first opening (13), wherein A hollow heat collecting tube (14) is disposed inside the casing (1), and at least one second opening (141) is disposed on a side of the hollow heat collecting tube (14) to correspond to the first opening (13) of the housing, and the second opening (141) The system is correspondingly provided with a high temperature resistant lens (142) for blocking heat from being emitted;

At least one lens (2) surrounds the periphery of the casing (1) and is correspondingly disposed at the first opening (13) of the casing (1), and the sunlight is focused through the lens (2) and passes through the first opening ( 13) and the second opening (141) is incident on the hollow heat collecting tube (14);

At least one metal mesh (3) is disposed in the hollow heat collecting tube (14) to receive sunlight incident through the lens (2);

a medium water and rainwater recovery pipe (4) is a method for controlling the amount of rainwater or medium water recovered by a water recovery system (41) to be poured onto the metal mesh (3) to generate hot steam;

A wind and steam engine (5) is disposed at the outlet end (12) of the casing (1) and includes a rotating shaft (not shown), a heated convection wind on the rotating shaft, hot steam, and external wind And a blade set (51) for rotating the rotating shaft, and a generator (52) coupled to the rotating shaft;

A battery (6) is electrically connected to the generator (52) of the wind power and steam engine (5) to store the power generated by the generator (52).

In addition, the hollow heat collecting tube (14) is a metal tube, and the metal material is formed by one material selected from the group consisting of a metal alloy and a heat collecting material; further, the hollow heat collecting tube (14) is a kind The metal tube which is easy to conduct heat, therefore, the outer casing (1) coated by the hollow heat collecting tube (14) can prevent the user from accidentally touching the hollow heat collecting tube (14) when the preferred embodiment of the present invention is actually implemented. The incident of scalding was created.

Furthermore, the lens (2) is a Fresnel lens to concentrate sunlight to form a smaller projection area; wherein the Fresnel lens is also called a threaded lens, which was originally applied to the light transmission of the lighthouse, Freman The design of the lens is to build a lens with a larger aperture, which is characterized by a short focal length. Compared to a conventional spherical lens, the Fresnel lens divides the lens into a series of theoretically numerous concentric circular lines, namely Fresnel. The band has the same optical effect. Therefore, compared with the general lens, the Fresnel lens saves the amount of material and is more dominant in weight and volume, because the Fresnel lens is better than the lens used earlier. It is thinner, so it can transmit more light to a farther place; the preferred embodiment of the present invention is characterized by applying a Fresnel lens with a shorter focal length and a larger amount of light, effectively concentrating sunlight on the staggered metal mesh ( 3) In order to achieve full use of the solar energy resources, the metal mesh (3) generates more heat to heat the air located in the hollow heat collecting tube (14), and accelerate the heat convection. fruit.

In addition, the material of the metal mesh (3) located in the hollow heat collecting tube (14) is formed by a material selected from the group consisting of a metal alloy and a heat collecting material, wherein sunlight incident through the lens (2) enters. When the inside of the hollow heat collecting tube (14) is directly irradiated on the metal mesh (3), and the air entering the hollow heat collecting tube (14) from the air inlet (11) contacts the high temperature metal mesh (3), Keeping the hot convection air at a high temperature to increase the speed of the wind turbine at the outlet end (12), and driving the generator to generate electricity; the metal mesh (3) erecting position corresponds to the first opening (13) and the second The opening (141) is positioned such that sunlight incident through the at least one lens (2) can be directly incident on the metal mesh (3).

In addition, Reclaimed Water, also known as reclaimed water or recycled water, refers to the standard of recycled water after treatment of municipal sewage or domestic sewage, and can be reused in non-potable water within a certain range. In the construction, the water supply is referred to as "sewage", and the discharged sewage is referred to as "sewage". Therefore, "middle water" means the meaning between the two; in the preferred embodiment of the present invention, The medium water and rainwater recovery pipe (4) is configured to timely inject the amount of rainwater or medium water recovered by the water recovery system (41) into the metal mesh (3) to generate hot steam of the water mist, since the water mist has The preferred air thrust speeds up the heat convection of the air, that is, the mathematical relationship calculates that the pressure generated by the water mist of the hot steam is multiplied by the difference between the density and the air density by the system height, when the hot steam water The fog density is 2.543 kg/m 3 at a temperature of 150 ° C, and the density of air at a temperature of 27 ° C is 0.118 kg / m 3 , assuming the height of the system When the pressure is 3 meters, the pressure generated by the hot steam water mist is 7.275kg/m 2 , and the speed of the hot steam water mist is 8m/s according to the relationship between the wind speed and the wind pressure; however, it must be noted that The temperature and density of the above-mentioned hot vapor water mist, the temperature and density of the air, and the height of the system are preferred embodiments for convenience of description, and are not limited to the examples, and those skilled in the art will know this. The temperature and density of the hot vapor mist of the invention, the temperature and density of the air, and the height of the system may vary depending on the characteristics of the system and the process conditions, and will not affect the actual implementation of the present invention.

In addition, referring to the second figure, an overall cross-sectional view of another preferred embodiment of the thermal convection power generation system of the present invention, wherein the interior of the casing (1) may further be provided with a convection conduit (15) having a hollow structure, convection. The bottom of the conduit (15) has an air guiding passage (151) screwed to the bottom end of the casing (1), the periphery of which is filled with a plurality of air holes (152), and the top portion is provided with an open end (153) when the air passes through After the air inlet (11) of the casing (1) enters and contacts the high temperature metal mesh (3), the air convection can be accelerated by the air hole (152) of the convection duct (15), and the hot air is accelerated by the top open end (153). The rise is to drive the wind and steam engine (5) to generate more power; in addition, the convection duct (15) has a downwardly tapered shape to accelerate the air flow rate of the heat convection.

In addition, the thermal convection power generation system may further be provided with a wind power generator (7) near the battery (6), which uses the peripheral wind to cause the fan to rotate to generate electricity for storage in the battery (6).

Furthermore, the air inlet (11) of the casing (1) may further be provided with a drainage fan group (8) to allow outside air to operate via the fan to accelerate into the interior of the casing (1).

In addition, a corner frame (not shown) may be further disposed at each corner of the bottom of the casing (1), the tripod is fastened to the high casing (1), and an air inlet is further disposed at the bottom of the casing (1) ( 11) The air inlet (11) is correspondingly provided with a drainage fan group (8), so that the outside air can also operate through the fan to accelerate into the interior of the casing (1).

In the actual implementation of the above-mentioned thermal convection power generation system, please refer to the third figure, which is a schematic diagram of a street lamp setting of a preferred embodiment of the thermal convection power generation system of the present invention, when the thermal convection power generation system of the present invention is applied to a street lamp ( 9) The power supply design may be directly irradiated to the housing (1) by sunlight or directly incident on the hollow heat collecting tube (14) from the first opening (13) and the second opening (141) via at least one lens (2). The metal mesh (3) staggered in the hollow heat collecting tube (14) is heated to gradually increase the temperature of the air in the hollow heat collecting tube (14), and enters the hollow heat collecting tube (14) through the air inlet (11). The air will also rise rapidly through the heating of the metal mesh (3). In addition, the medium water and rainwater recovery pipe (4) will also water the rainwater or medium water recovered from the water recovery system (41) to control the injection amount. On the metal mesh (3), a hot steam mist is generated to push the hot air to accelerate upward to push the wind and steam machine disposed at the outlet end (12) of the casing (1) ( Operating, wherein the operating mechanism of the wind and steam engine (5) is driven by the rising air to drive the blade set (51) to drive the wind and the rotating shaft of the steam engine (5), and finally to the generator coupled to the rotating shaft (52) generating electricity, and the electric energy generated by the generator (52) is stored in the battery (6); when the color of the day is dimmed and there is a need for illumination of the street lamp (9), the amount of electricity stored in the battery (6) The utility model can provide power to the street lamp (9) to complete the street lamp system with self-power supply function; further, please refer to the fourth figure, which is a schematic diagram of the wind generator setting of another preferred embodiment of the thermal convection power generation system of the present invention, When the weather continues to be rainy, the thermal energy provided by the sunlight cannot effectively heat the metal mesh (3), so if the power generation of the wind and steam engine (5) is not as good as expected by the heat convection, the thermal convection power generation system can Further, a wind power generator (7) is disposed on the casing (1) near the battery (6), and the wind power generator can be driven by the external wind power (7) The blades rotate to generate electricity, and the power generation concept is like a wind power system located in a wind power plant. Finally, the wind power generator (7) can be electrically connected to the battery (6), so that the power generated by the wind power generator (7) can be stored. In the battery (6); further, please refer to the fifth figure, which is a schematic diagram of the drainage fan set of another preferred embodiment of the thermal convection power generation system of the present invention, wherein the air inlet (11) of the casing (1) Further, a drainage fan group (8) may be further provided, so that the outside air can be accelerated into the casing (1) through the operation of the fan of the drainage fan group (8) to accelerate the speed of air heat convection, and the shell is extended according to the concept. Further, a tripod can be further disposed at each corner of the bottom of the body (1), and the tripod can be used to raise the housing (1), so that the bottom of the housing (1) can further be provided with an air inlet (11) and an air inlet (11). Correspondingly, a drainage fan group (8) is arranged to accelerate the outside air into the casing (1) through the operation of the fan of the drainage fan group (8); the invention can be further extended according to the concept Stretching, a plurality of solar panels (not shown) may be disposed on the casing (1) of the thermal convection power generation system, wherein the plurality of solar panels are also electrically connected to the battery (6), when the solar energy and heat energy are provided When it is large enough, the sunlight is incident on the hollow heat collecting tube (14) through the lens (2), and may be irradiated on the plurality of solar panels to generate electric energy for storage in the battery (6) for use by the street lamp (9). To achieve multi-purpose power generation needs.

It can be seen from the above description that the present invention has the following advantages in comparison with the prior art in the thermal convection power generation system of the present invention:

1. The heat convection power generation system of the present invention combines the heat energy provided by the natural resources with the wind energy to generate high-speed heat convection in the heat convection power generation system, thereby driving the generator to generate power, and then recovering the water. Or rainwater timely control the amount of injection water to generate hot steam on the staggered metal mesh in the cavity to speed up the heat convection and effectively improve the efficiency of the power generation system.

2. Compared with the conventional thermal convection power generation device, the reflector plate is used to reflect the uniform sunlight to the outer surface of the pedestal. The present invention directly uses the Fresnel lens to have a short focal length and a large amount of light. The light source is gathered into a small projected area and projected onto the staggered metal mesh in the cavity, and more heat energy can be collected to obtain sufficient heat for the air passing through the metal plate to perform thermal convection to drive the generator.

3. The heat convection power generation system of the present invention is designed with the first opening and the second opening, so that the sunlight is directly irradiated through the lens to the staggered metal mesh in the cavity, and the air in the cavity can only be increased compared with the conventional heat convection power generating device. When the temperature reaches 100 ° C, the invention can increase the temperature of the air in the cavity by more than 300 ° C, thereby generating a level of considerable wind power, and rapidly driving the blade set of the generator to improve the efficiency of wind power generation.

4. The housing of the thermal convection power generation system of the present invention is designed to increase the wind speed of the heat convection by increasing the angle of the outlet at the top and the design of the hollow heat collecting tube of sufficient length, and increasing the rotation speed of the blade set of the generator to increase power generation. efficacy.

In summary, the thermal convection power generation system of the present invention can achieve the intended use efficiency by the above-disclosed embodiments, and the present invention has not been disclosed before the application, and has fully complied with the provisions of the Patent Law. Claim.爰Issuing an application for a patent for invention in accordance with the law, and asking for a review, and granting a patent, is truly sensible.

The illustrations and descriptions of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; those skilled in the art, which are characterized by the scope of the present invention, Equivalent variations or modifications are considered to be within the scope of the design of the invention.

(1) ‧‧‧Shell

(11) ‧‧‧ inlet

(12) ‧‧‧export end

(13) ‧ ‧ first opening

(14) ‧‧‧Hollow heat collecting tubes

(141) ‧ ‧ second opening

(142)‧‧‧High temperature resistant lenses

(2) ‧ ‧ lens

(3)‧‧‧Metal net

(4) ‧‧‧Water and rainwater recovery pipes

(41) ‧‧‧Water recovery system

(5) ‧‧‧Wind and steam engines

(51)‧‧‧Face group

(52)‧‧‧Generator

(6) ‧‧‧Battery

Claims (9)

A thermal convection power generation system mainly uses a wind power combined with the heat energy provided by the solar energy to generate a heat convection and converts the power into a power generation system, which at least includes:
a casing is disposed on the side near the bottom end to provide at least one air inlet, the top end is formed with an angled tapered outlet end, and the side surface is provided with at least one first opening, wherein the inside of the casing is provided with a hollow heat collecting tube, The side of the hollow heat collecting tube is provided with at least one second opening corresponding to the first opening of the casing, and the second opening is correspondingly provided with a high temperature resistant lens for blocking heat from being discharged;
At least one lens is disposed around the periphery of the housing and correspondingly disposed at the first opening of the housing, and the sunlight is focused through the lens and is incident into the hollow heat collecting tube through the first opening and the second opening;
At least one metal mesh is disposed in the hollow heat collecting tube to receive sunlight incident through the lens;
a medium water and rainwater recovery pipe is configured to timely inject a timely amount of rainwater or medium water recovered from a water recovery system onto the metal mesh to generate hot steam;
a wind power and steam engine is disposed at the outlet end of the casing, and includes a rotating shaft, a blade group disposed on the rotating shaft, which is heated by convective wind, hot steam, and external wind, and rotates the rotating shaft, and a generator coupled to the shaft; and a battery electrically connected to the generator of the wind and steam to store the power generated by the generator. The thermal convection power generation system according to claim 1, wherein the hollow heat collecting tube is a metal tube, and the metal material is selected from the group consisting of a metal alloy and a heat collecting material. The thermal convection power generation system of claim 1, wherein the lenses are Fresnel lenses to concentrate sunlight to form a smaller projected area. The thermal convection power generation system according to claim 1, wherein the material of the metal mesh is selected from the group consisting of a metal alloy and a heat collecting material. The convection power generation system of claim 1, wherein the casing is further provided with a convection conduit having a hollow structure, and the bottom of the convection conduit has an air guiding passage and is screwed to the bottom end of the casing. The periphery is covered with a plurality of pores, and the top is provided with an open end. The heat convection power generation system of claim 5, wherein the convection duct system has a downwardly tapered shape. The heat convection power generation system according to claim 1, wherein the heat convection power generation system further comprises a wind power generator near the battery, and the wind is used to cause the blades to rotate to generate electric power for storage in the battery. The heat convection power generation system of claim 1, wherein the air inlet of the casing further corresponds to a drainage fan group, so that outside air is operated by the fan to accelerate into the interior of the casing. The heat convection power generation system of claim 1, wherein a corner of the bottom of the casing is further provided with a tripod, the tripod is elevated to the casing, and an air inlet is further disposed at the bottom of the casing. A draft fan group is disposed corresponding to the air inlet to allow outside air to operate through the fan to accelerate into the interior of the housing.