Clean air supply electromagnetic induction hot blast stove

Abstract

The utility model discloses a clean air supply electromagnetic induction hot blast stove which comprises a heating box and a hot air conveying fan, an electromagnetic induction heating cylinder is arranged in the heating box, a cylinder body, an electromagnetic heating coil and heating fins are arranged in the electromagnetic induction heating cylinder, and the hot air output end of the cylinder body is connected with the input end of the hot air conveying fan. The electromagnetic heating coil is wound outside the barrel, the heating fins are arranged in the barrel, the cold air input end of the barrel is connected with a fresh air cabinet in the heating box, the fresh air cabinet is connected with at least two clean cold air input pipes, and the clean cold air input pipes are arranged on the outer side of the electromagnetic induction heating barrel in parallel to surround the electromagnetic induction heating barrel. The input end of the clean cold air input pipe extends out of the heating box. Electromagnetic induction heating is adopted, the heat efficiency is high, hot air generated by the hot blast stove is clean and free of peculiar smell, the hot air volume is large, internal heat is not prone to being dissipated to the outside, the overall heat preservation and energy saving effects are good, and the hot blast stove is quite suitable for large-scale drying of tea, agricultural products, food and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of hot air drying equipment, in particular to a clean air supply electromagnetic induction hot blast stove. Background Art

[0002] Existing electric drying ovens generally include drying ovens heated by electric heating tubes or drying ovens with electromagnetic heating. The electromagnetic heating method has high thermal efficiency and has been widely used in drying equipment.

[0003] The Chinese invention patent application with the publication number of CN104819566A and the patent name of electromagnetic hot blast stove discloses a structure of an electromagnetic hot blast stove, which mainly consists of a box body, an operation cabinet, a control cabinet and an electromagnetic heater. The electromagnetic heater is built inside the box body. A cylinder is arranged inside the box body. An air inlet and an air outlet are respectively arranged at both ends of the cylinder. The air outlet is connected to a centrifugal fan. A heat preservation layer is arranged inside the cylinder. A plurality of electromagnetic induction coils are wound around the surface of the cylinder and connected to a PLC controller. Under the action of the centrifugal fan, fresh air enters the inside of the cylinder through the air inlet of the electromagnetic heater. The electromagnetic heater outputs an ultra-audio frequency current of 20 - 40KHz. When the high-speed changing ultra-audio frequency high-voltage current flows through the electromagnetic induction coil, a high-speed changing alternating magnetic field will be generated. When the magnetic force lines in the magnetic field pass through the ferromagnetic metal material, countless small eddy currents will be generated in the metal body, causing the metal material itself to heat up rapidly, thereby heating the air in the cylinder.

[0004] Since the air inlet of the existing such electromagnetic hot blast stoves is not isolated from the electromagnetic induction coils wound on the cylinder, and the electromagnetic induction coils will emit peculiar smells during the heating operation, the air inlet will transport the peculiar smells emitted by the electromagnetic induction coils to the air outlet when sucking air, resulting in the hot air generated by the existing such electromagnetic hot blast stoves not being clean enough, which is not conducive to drying products and foods such as tea leaves, crops, etc., and needs to be further improved to be able to provide clean hot air for drying. Summary of the Utility Model

[0005] In order to solve the above problems, the purpose of the utility model is to provide a clean air supply electromagnetic induction hot blast stove, which has high thermal efficiency, the generated hot air is clean and odorless, the hot air volume is large, and the internal heat is not easily dissipated to the outside, and the overall heat preservation and energy-saving effect is good, and it is very suitable for large-scale drying of tea leaves, agricultural products, foods, etc.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A clean air supply electromagnetic induction hot blast stove, comprising a heating box and a hot air delivery fan. An electromagnetic induction heating cylinder is provided in the heating box. A cylinder body, an electromagnetic heating coil and heating fins are provided in the electromagnetic induction heating cylinder. The hot air output end of the cylinder body is connected to the input end of the hot air delivery fan, and the output end of the hot air delivery fan is connected to the using end. The electromagnetic heating coil is wound outside the cylinder body, and the heating fins are arranged in the cylinder body. The cold air input end of the cylinder body is connected to a fresh air cabinet in the heating box. The fresh air cabinet is connected with at least two clean cold air input pipes. The clean cold air input pipes are arranged in parallel outside the electromagnetic induction heating cylinder to surround the electromagnetic induction heating cylinder. The input end of the clean cold air input pipe extends outside the heating box.

[0008] There are six to twelve clean cold air input pipes, and a plurality of the clean cold air input pipes are arranged in a circumferential array outside the electromagnetic induction heating cylinder to parallelly surround the electromagnetic induction heating cylinder.

[0009] Further, the clean cold air input pipe is made of an aluminum pipe.

[0010] Further, an air filtering device is connected to the input end of the clean cold air input pipe, and there are more than two layers of filter nets in the air filtering device.

[0011] Further, a heat preservation isolation sleeve isolated from the output end of the cylinder body is provided in the air filtering device.

[0012] Further, a blast stirring device is provided in the fresh air cabinet.

[0013] Further, an isolation net is provided at the input end of the cylinder body in the fresh air cabinet.

[0014] Further, a temperature detection device is provided in the cylinder body, and the temperature detection device, the electromagnetic heating coil and a heating controller provided on the heating box are controlled and connected.

[0015] Further, the heating power of the electromagnetic heating coil is 50 - 200 KW.

[0016] Further, a seal maintenance cover plate which is convenient for disassembly is provided on one side of the fresh air cabinet.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model adopts electromagnetic induction heating, which has high thermal efficiency. The hot air generated by the hot blast stove is clean and odorless, has a large hot air volume, and the internal heat is not easily dissipated to the outside. The overall heat preservation and energy-saving effect is good, and it is very suitable for large-scale drying of tea, agricultural products, food, etc.

[0019] 2. A clean cold air input pipe is arranged outside the electromagnetic induction heating cylinder of the present utility model. The clean fresh air input by the clean cold air input pipe will not come into contact with the electromagnetic heating coil and will not bring the peculiar smell generated by the electromagnetic heating coil into the hot air. Moreover, the clean cold air input pipe is made of a non-magnetic material and will not generate electromagnetic induction with the electromagnetic heating coil, which can effectively avoid heat loss. And the heat dissipated by the electromagnetic induction heating cylinder and the electromagnetic heating coil is absorbed by the cold air in the clean cold air input pipe, preventing the heat from being dissipated to the outside of the equipment, and having a better heat preservation and energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is one of the perspective views of the clean air supply electromagnetic induction hot blast stove of the present utility model.

[0021] Figure 2 FIG. 2 is another perspective view of the clean air supply electromagnetic induction hot blast stove of the present utility model.

[0022] Figure 3 FIG. 3 is a schematic structural view of the input end of the electromagnetic induction heating cylinder and the output end of the clean cold air input pipe in the fresh air cabinet of the present utility model.

[0023] Figure 4 FIG. 4 is a schematic cross-sectional view of the clean air supply electromagnetic induction hot blast stove of the present utility model.

[0024] DESCRIPTION OF THE REFERENCE NUMERALS:

[0025] 1. Heating box; 11. Fresh air cabinet; 12. Sealed maintenance cover plate; 2. Hot air delivery fan; 3. Electromagnetic induction heating cylinder; 31. Cylinder body; 32. Electromagnetic heating coil; 33. Heating fins; 4. Clean cold air input pipe; 5. Air filtering device; 51. Heat preservation and isolation sleeve; 6. Blowing and stirring device; 7. Isolation net; 8. Heating controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model in detail with reference to the drawings and specific embodiments:

[0027] See Figures 1-4As shown in the figure, a clean air supply electromagnetic induction hot blast stove includes a heating box 1 and a hot air delivery fan 2. An electromagnetic induction heating cylinder 3 is provided in the heating box 1. A cylinder body 31, an electromagnetic heating coil 32, and heating fins 33 are provided in the electromagnetic induction heating cylinder 3. The hot air output end of the cylinder body 31 is connected to the input end of the hot air delivery fan 2, and the output end of the hot air delivery fan 2 is further connected to the hot air usage end (such as an oven, a drying tank, etc.). The electromagnetic heating coil 32 is wound outside the cylinder body 31, and the heating fins 33 are arranged in the cylinder body 31. The cold air input end of the cylinder body 31 is connected to a fresh air cabinet 11 in the heating box 1. The fresh air cabinet 11 is connected to at least two clean cold air input pipes 4. The clean cold air input pipes 4 are arranged in parallel on the outside of the electromagnetic induction heating cylinder 3 to surround the electromagnetic induction heating cylinder 3. The clean cold air input pipes 4 are made of aluminum pipes, or other non-magnetic and heat-resistant materials can also be used, to avoid electromagnetic induction between the clean cold air input pipes 4 and the electromagnetic heating coil 32 to generate unnecessary heat, avoid heat loss, and be safer and more reliable. The input end of the clean cold air input pipe 4 extends outside the heating box 1 and is connected to an air filtering device 5. Two or more layers of filter meshes are provided in the air filtering device 5 to prevent foreign objects from entering the fresh air cabinet 11 and ensure clean air. A heat preservation isolation sleeve 51 that is isolated from the output end of the cylinder body 31 is provided in the air filtering device 5 to prevent the heat transmitted from the cylinder body 31 from entering the air filtering device 5. A blast stirring device 6 is provided in the fresh air cabinet 11. An isolation net 7 is provided at the input end of the cylinder body 31 in the fresh air cabinet 11 to further prevent foreign objects from entering the electromagnetic induction heating cylinder 3 and causing failures. A detachable sealed maintenance cover plate 12 is provided on one side of the fresh air cabinet 11 for easy opening for inspection and maintenance.

[0028] The clean cold air input pipes 4 include six to twelve, and the quantity is designed and selected according to the diameters of the heating cylinder and the air duct. A plurality of the clean cold air input pipes 4 are arranged in a circumferential array on the outside of the electromagnetic induction heating cylinder 3 to surround the electromagnetic induction heating cylinder 3 in parallel.

[0029] A temperature detection device is provided in the cylinder body 31. The temperature detection device, the electromagnetic heating coil 32, and a heating controller 8 provided on the heating box 1 are controlled and connected. The heating power of the electromagnetic heating coil 32 is 50 - 200 KW; it has a wide range of applications.

[0030] When the utility model works, the heating controller 8 is used to control the electromagnetic heating coil 32 to be energized so that it induces heat with the cylinder body 31. The cold air input by a plurality of clean cold air input pipes 4 enters the fresh air cabinet 11 to be mixed and then enters the cylinder body 31 for heating. A plurality of heating fins 33 are arranged in the cylinder body 31 to facilitate heat exchange. The heated hot air is transported to the subsequent usage position through the hot air delivery fan 2.

[0031] The above are only specific embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A clean air supply electromagnetic induction hot air furnace, comprising a heating box (1) and a hot air delivery fan (2), characterized in that: The heating box (1) is provided with an electromagnetic induction heating cylinder (3), and the electromagnetic induction heating cylinder (3) is provided with a cylinder (31), an electromagnetic heating coil (32) and heating fins (33). The hot air output end of the cylinder (31) is connected to the input end of the hot air conveying fan (2), and the output end of the hot air conveying fan (2) is connected to the use end. The electromagnetic heating coil (32) is wound outside the cylinder (31), and the heating fins (33) are arranged in the cylinder (31). The cold air input end of the cylinder (31) is connected to the fresh air cabinet (11) in the heating box (1), and the fresh air cabinet (11) is connected to at least two clean cold air input pipes (4). The clean cold air input pipes (4) are arranged in parallel on the outside of the electromagnetic induction heating cylinder (3) to surround the electromagnetic induction heating cylinder (3), and the input end of the clean cold air input pipe (4) extends to the outside of the heating box (1).

2. A clean air supply electromagnetic induction hot air furnace according to claim 1, characterized in that: The clean cold air inlet pipes (4) include six to twelve, and a plurality of the clean cold air inlet pipes (4) are arranged in a circular array on the outside of the electromagnetic induction heating tube (3) to surround the electromagnetic induction heating tube (3) in parallel.

3. A clean air supply electromagnetic induction hot air furnace according to claim 1 or 2, characterized in that: The clean cold air inlet pipe (4) is made of an aluminum tube.

4. A clean air supply electromagnetic induction hot air furnace according to claim 1 or 2, characterized in that: The input end of the clean cold air input pipe (4) is connected to an air filter device (5), and the air filter device (5) is provided with more than two layers of filter screens.

5. A clean air supply electromagnetic induction hot air furnace according to claim 4, characterized in that: The air filter device (5) is provided with a heat-insulating isolation sleeve (51) which is isolated from the output end of the cylinder (31).

6. The clean air supply electromagnetic induction hot air furnace according to claim 1, characterized in that: The fresh air cabinet (11) is provided with an air blowing and stirring device (6).

7. A clean air supply electromagnetic induction hot air furnace according to claim 1 or 6, characterized in that: An isolation net (7) is provided at the input end of the cylinder (31) in the fresh air cabinet (11).

8. The clean air supply electromagnetic induction hot air furnace according to claim 1, characterized in that: A temperature detection device is provided in the cylinder (31), and the temperature detection device and the electromagnetic heating coil (32) are connected to a heating controller (8) provided on the heating box (1).

9. The clean air supply electromagnetic induction hot air furnace according to claim 1, characterized in that: The heating power of the electromagnetic heating coil (32) is 50-200 kW.

10. The clean air supply electromagnetic induction hot air furnace according to claim 1, characterized in that: A sealing maintenance cover (12) that is easily removable is provided on one side of the fresh air cabinet (11).

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