Electromagnetic air heater

[0039] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like figure 1 As shown, an electromagnetic hot air blower includes: a rack 1 and an electromagnetic heating air duct 4, an electric control box 2 is arranged on the side of the rack 1, and a console 3 is installed on the top of the electric control box 2; the electromagnetic heating air duct 4 It is installed inside the rack 1 through a support frame; the electromagnetic heating air cylinder 4 includes: an air inlet and outlet assembly 7 , a heating cylinder, a shaftless fan 9 and a reversing air cover 11 .

[0041] like Image 6 As shown, the air inlet and outlet assembly 7 is used for the input of cold air and the output of hot air; the air inlet and outlet assembly 7 includes an air outlet duct 12 and an air inlet duct 14, and one end of the air outlet duct 12 is provided with a connection with the first heating barrel 8 The flange 13 is connected, and the air outlet duct 12 is used for outputting hot air. The air inlet duct 14 is in the shape of a curved tube. One end of the air inlet duct 14 is provided with an air inlet 15, and the other end is provided with an air suction port 16. The air inlet 15 is connected to the inner cylinder. 17 is connected, the air suction port 16 penetrates the air outlet 12 and extends to the outside of the air outlet 12, which is convenient for inhaling external air.

[0042] combine figure 2 , image 3 and Figure 5 As shown, the outer side of the heating cylinder is wound with an electromagnetic coil, and the electromagnetic coil is electrically connected with the electric control box 2 for preheating the cold air and heating the preheated cold air into hot air, and the heating cylinder of the present embodiment includes the first heating barrel 8 and the second heating barrel 10, the first heating barrel 8 and the second heating barrel 10 are respectively provided with the inner barrel 17 and the outer barrel 18 that communicate with each other, namely the first heating barrel 8 and the second heating barrel The inner cylinder of 10 is communicated with each other to form a preheating cavity 24, and the outer cylinder 18 of the first heating barrel 8 and the second heating barrel 10 are communicated with each other to extend the length of the inner barrel 17 and the outer barrel 18, and use the inner barrel 17 to use In order to preheat the cold air into warm air, and at the same time the outer cylinder 18 is used to heat the warm air to form hot air, the outer wall of the inner cylinder 17 and the inner wall of the outer cylinder 18 are connected by a plurality of partitions 19, and the adjacent two Separate heat exchange chambers 25 are formed between the partitions 19 , so that a plurality of separate heat exchange chambers 25 are finally distributed between the inner cylinder 17 and the outer cylinder 18 .

[0043]In this embodiment, the preheating is performed by the preheating chamber 24 in the inner cylinder 17, and at the same time, it is further heated by the plurality of individual heat exchange chambers 25 in the outer cylinder 18, so that the preheated air is rapidly heated, and each individual heat exchange chamber is heated. The air guide assembly 20 in 25 can extend the flow distance of the hot air and increase the heating area during the flow process. Since the preheating chamber 24 has preheated the airflow, in the case of matching the preheating chamber 24, the heat exchange efficiency can be greatly improved, In addition, the heat of the inner cylinder 17 is effectively utilized to reduce the waste of energy.

[0044] like image 3 , Figure 7 , Figure 8 and Figure 9 As shown, the heat exchange cavity 25 is provided with a guide assembly 20 for extending the flow distance of the hot air. The guide assembly 20 is a helical guide fin 200, so that the interior of the heat exchange cavity 25 is separated to form a spiral cavity, so that the hot air flows in the spiral. The flow in the cavity advances, extending the flow distance while increasing the heating area, and does not need to install a spoiler to disturb the airflow, which plays a role in reducing noise. The side of the guide sheet 200 is provided with a connecting seat 201. It is connected with the side wall of the heat exchange cavity 25, so that the guide fin 200 is fixed in the heat exchange cavity 25. The upper edge and the lower end edge of the guide fin 20 are in contact with the inner wall of the heat exchange cavity 25. An electromagnetic coil is wound on the outside, the temperature of the outer cylinder 18 is relatively high, and the temperature of the heat exchange cavity 25 is also relatively high. Better heat exchange during flow.

[0045] like image 3 , Figure 4 and Figure 5 As shown in the figure, the heat exchange chamber 25 is provided with a circulating heating part that communicates with the inner cylinder 17 to accelerate the preheating of the cold air in the inner cylinder 17, effectively improving the preheating efficiency of the inner cylinder 17 and making the heat exchange more efficient; the circulation heating The air guide plate 21 includes an air guide plate 21 arranged in the heat exchange chamber 25, the air guide plate 21 is installed on the outer wall of the inner cylinder 17, and an air inlet hole 22 is provided under the side of the air guide plate 21 facing the hot air flow direction. The lower end of the air inlet hole 22 is provided with an air outlet hole 23, and the air inlet hole 22 and the air outlet hole 23 are not on the same longitudinal axis, so that an oblique air channel is formed between the air inlet hole 22 and the air outlet hole 23, so that the air outlet The air outlet direction of the hole 23 is the same as the cold air input direction, so as to prevent the airflow of the inner cylinder 17 from entering the heat exchange chamber 25. The air outlet hole 23 is opened on the inner wall of the inner cylinder 17, and the air inlet hole 22 is opened in the inner cylinder. 17 on the outer wall.

[0046] The height of the air guide plate 21 in this embodiment is 2-3 cm, which prevents the overall direction of the hot air flow from being blocked, and can guide a small part of the further heated hot air into the inner cylinder 17 to increase the temperature of the inner cylinder and improve the preheating efficiency. .

[0047] In this embodiment, the side of the air guide plate 21 close to the air inlet hole 22 is an arc surface, which is convenient for the flow of the gas to be guided, so that part of the hot air flows through the inclined air channel and enters the inner cylinder 17. The diameter of the air inlet hole 22 is larger than that of the air inlet hole 22. The diameter of the air outlet hole 23, the inclined air duct is gradually reduced from the air inlet hole 22 to the air outlet hole 23, so that after the hot air enters from the air inlet hole 22, it is ejected from the air outlet hole 23 through the tapered inclined air duct, preventing The airflow of the inner cylinder 17 enters the heat exchange chamber 25, which can also speed up the preheating efficiency for the airflow of the inner cylinder 17.

[0048] combine figure 2 , image 3 , Figure 5 , Figure 10 , Figure 11 and Figure 12 As shown, the shaftless fan 9 is located between the first heating barrel 8 and the second heating barrel 10, and is used to draw cold air into the inner barrel 17 and blow the hot air out of the outer barrel 18, and the shaftless fan 9 includes a fan outer ring 27 and the fan inner ring 30, a fan blade cavity is formed between the fan outer ring 27 and the fan inner ring 30, the fan blade cavity is communicated with the heat exchange cavity 25, and the inside of the fan inner ring 30 is communicated with the inner cylinder 17, A plurality of first fan blades 31 are arranged between the fan outer ring 27 and the fan inner ring 30 to make the hot air in the heat exchange cavity 25 blow to the air outlet duct 12 , and a plurality of second fan blades 31 are arranged in the fan inner ring 30 . Fan blades 32, so that the inner cylinder 17 is drawn into the cold air; the shaftless fan 9 acts on the inner cylinder 17 and the outer cylinder 18 at the same time, so that the air flow of the inner cylinder 17 and the outer cylinder 18 has different flow directions, so that the air flow in the heating cylinder The internal flow distance is longer and the heat exchange efficiency is higher.

[0049] In this embodiment, the fan blade cavity and the inner cavity of the fan inner ring 30 are relatively independent cavities, and the angles of the first fan blade 31 and the second fan blade 32 are set in opposite directions. The direction of flow of the two air streams.

[0050] In this embodiment, both sides of the outer wall of the fan outer ring 27 are sleeved with a rotating sleeve limiting ring 29 , and one side of the rotating sleeve limiting ring 29 is provided with a rotating sleeve 26 sleeved on the fan outer ring 27 . The sleeve 26 is connected to the outer barrel 18 to facilitate fixing the shaftless fan 9 between the first heating barrel 8 and the second heating barrel 10 .

[0051] A gear ring 28 is arranged between the rotating sleeve limit rings 29 on both sides. The gear ring 28 is fixedly sleeved on the outer wall of the fan outer ring 27. The gear ring 28 is connected with a drive motor 5 through a transmission belt. inside the frame 1, so that the outer fan ring 27 rotates in the rotating sleeve 26, thereby driving the first fan blade 31 and the second fan blade 32 to rotate, wherein the rotating sleeve 26 can use a bearing to improve the rotation of the fan outer ring 27 Fluency, because the drive motor 5 used to drive the shaftless fan 9 is not in the heating cylinder, the influence of heat on the shaftless fan 9 is eliminated, the service life is longer, and the maintenance is convenient, reducing operating costs.

[0052] combine image 3 , Figure 5 and Figure 13 As shown, the reversing wind cover 11 is located at the end of the second heating barrel 10 away from the shaftless fan 9, and is used to turn the flow direction of the warm air in the inner cylinder 17 into the outer cylinder 18, and the reversing wind cover 11 includes a cover body. 33, the cover body 33 is provided with an arc-shaped cavity, the center of the arc-shaped cavity is provided with a conical head 34, the tip of the conical head 34 and the center of the inner cylinder 17 are on the same axis, when the inner cylinder 17 The airflow reaches the inside of the cover body 33, and under the action of the conical head 34 and the arc-shaped cavity, the airflow disperses the airflow around and enters the heat exchange cavity 25, so that the hot air heating is more uniform.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and alterations can be made to these embodiments, which still fall within the protection scope of the present invention.