CN214307616U - Electromagnetic heating device of greenhouse - Google Patents
Electromagnetic heating device of greenhouse Download PDFInfo
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- CN214307616U CN214307616U CN202120385583.XU CN202120385583U CN214307616U CN 214307616 U CN214307616 U CN 214307616U CN 202120385583 U CN202120385583 U CN 202120385583U CN 214307616 U CN214307616 U CN 214307616U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The utility model belongs to the technical field of the heat exchange, specific saying relates to a warmhouse booth's electromagnetic heating device. The structure of the hot air heating device comprises a hot air cylinder body consisting of an inner cylinder, an outer cylinder and an electromagnetic induction heating coil arranged between the inner cylinder and the outer cylinder; the inner cylinder is made of a magnetic conductive material, an insulating layer is arranged between the inner cylinder and the electromagnetic induction heating coil, an air guide cylinder which is coaxially arranged is arranged in the inner cylinder, the windward end of the air guide cylinder is a protruding tip, and an annular cavity gap for overheating air is formed between the air guide cylinder and the inner cylinder. The novel electromagnetic heating device has the characteristics of simple and compact structure, high heat exchange efficiency, quick overheating of circulating air of the greenhouse and remarkable temperature regulation.
Description
Technical Field
The utility model belongs to the technical field of the heat exchange, specific saying relates to a warmhouse booth's electromagnetic heating device.
Background
In the production operation of the greenhouse, heating in winter is the primary condition for ensuring the high-efficiency and high-quality operation of the greenhouse. Heating equipment of the greenhouse is of various types, a coal-fired boiler is adopted mostly, and 2-ton and 4-ton chain type hot water boilers are taken as the main raw materials; secondly, a hot blast stove; in addition, the device also comprises an oil-gas boiler, an oil-gas hot blast stove, an electric heating device and the like.
Coal-fired boiler strengthens along with national environmental protection policy year by year, especially in northern area, this kind of coal-fired boiler has mostly been replaced by the natural gas, will withdraw from historical stage gradually, simultaneously, the hot air system application scope of utilizing electric heating also obtains constantly promoting. At present, most of electric heating equipment is resistance wires or iodine tungsten lamps, directly overheat air, are intensively arranged, are exposed and have more contact points, belong to open fire, easily cause fire in the ventilation process, are slowly heated and are not intelligent enough to control; the common tubular heating device is generally characterized in that a resistance wire is placed in a steel tube to serve as a heating body, a proper amount of quartz sand is filled in the steel tube to serve as a conducting medium, and the quartz sand is loosely arranged to form a plurality of air gaps and serves as a heat conducting medium at the same time, and finally the heat can be transferred to air through a heating metal tube shell. The heat efficiency is less than 60 percent, and the surface temperature of the heat pipe is usually 450-550 ℃. The use of the above electrical heating in greenhouses for planting vegetables or melons and fruits is uneconomical and unreasonable; secondly, there is also a problem of poor reliability, often a resistance wire is open or a ground short circuit, so that the personal safety of the charged shell is damaged.
Therefore, the electromagnetic heating new technology has appeared, for example the utility model discloses a fin ventilation electromagnetism hot-blast furnace for patent number CN207849740U, evenly be provided with a plurality of radial fin boards along circumference on its cartridge heater inner wall, radial fin board length equals the length of cartridge heater, radial fin board both ends all have set firmly discoid deep bead, the deep bead makes cartridge heater import and exit form a plurality of fan annular wind gaps with radial fin board cooperation, all be provided with the turbulent flow piece that links firmly mutually with the cartridge heater inner wall in the fan annular wind gap. The electromagnetic hot blast stove improves the heat exchange efficiency to a certain extent and enhances the applicability, but has complex structure, high manufacturing cost and poor use economic benefit; secondly, the air circulation is converted from laminar flow to turbulent flow, the flow velocity of the overheated air is slowed down, the heating working efficiency is reduced, the effective overheating period of the equipment is prolonged, the electric energy consumption is high, and the use cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electromagnetic heating device that simple structure is compact, electric heat exchange efficiency is high, fast to warmhouse booth circulated air overheat rate.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a warmhouse booth's electromagnetic heating device which characterized in that: comprises a hot air cylinder body consisting of an inner cylinder, an outer cylinder and an electromagnetic induction heating coil arranged between the inner cylinder and the outer cylinder; the inner cylinder is made of a magnetic conductive material, an insulating layer is arranged between the inner cylinder and the electromagnetic induction heating coil, an air guide cylinder which is coaxially arranged is arranged in the inner cylinder, the windward end of the air guide cylinder is a protruding tip, and an annular cavity gap for overheating air is formed between the air guide cylinder and the inner cylinder.
The additional technical characteristics of the electromagnetic heating device for the greenhouse further comprise that:
the electromagnetic induction heating coil is electrically connected with a PLC (programmable logic controller), and the PLC comprises a temperature sensor arranged in the hot air cylinder;
one end of the hot air cylinder is provided with an air guide channel, the other end of the hot air cylinder is provided with an air outlet, the air guide cylinder is connected with the inner cylinder through a plurality of support frames, and the tip part of the air guide cylinder is a conical surface or a spherical surface;
the air guide duct of the hot air cylinder is connected with an axial flow fan through a flange plate, the axial flow fan is connected with the PLC through a frequency converter, and the air outlet of the hot air cylinder is connected with an air supply pipeline through the flange plate;
the inner wall surface of the inner cylinder and/or the outer surface of the air guide cylinder are/is provided with spiral blades;
an insulating layer is arranged between the outer cylinder and the electromagnetic induction heating coil, and is made of ceramic fibers and 10mm in thickness;
-the inner cylinder is made of steel plate with a thickness of 10 mm; the thickness of the insulating layer is 2 mm; the electromagnetic induction heating coil is a copper core insulated wire; the outer cylinder is made of a stainless steel plate and is 1mm thick; the air duct is made of carbon steel and has the thickness of 2 mm.
Compared with the prior art, the utility model provides a warmhouse booth's electromagnetic heating device has following advantage: the novel electromagnetic heating device comprises a hot air cylinder body, a heating coil, a cooling coil, a heating coil, a fan motor, a motor; secondly, because the windward end of the air guide cylinder is a protruding tip part, an annular cavity gap for overheating air is formed between the air guide cylinder and the inner cylinder, the tip part of the air guide cylinder is a conical surface or a spherical surface, the wind and turbulence shielding effect is achieved on the basis of drainage, the flow state is changed from laminar flow to turbulent flow, and the gas heat exchange efficiency in the turbulent flow state is greatly higher than that in the laminar flow state; thirdly, because electromagnetic induction heating coil and PLC controller electrical connection, the PLC controller is including setting up the temperature sensor in hot-blast barrel to and be connected with control axial fan's converter, be convenient for master air heating data in real time, and can adjust wind speed, amount of wind and electromagnetic heating power fast, improved the intelligent degree of device, the greenhouse big canopy heating effect that heats is excellent.
Drawings
Fig. 1 is a schematic structural view of the electromagnetic heating device of the greenhouse of the present invention.
Detailed Description
The structure and the working principle of the electromagnetic heating device for the greenhouse provided by the present invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1, it is a schematic structural view of the electromagnetic heating device of the greenhouse provided by the present invention. The structure of the novel electromagnetic heating device comprises a hot air cylinder body consisting of an inner cylinder 1, an outer cylinder 2 and an electromagnetic induction heating coil 3 arranged between the inner cylinder and the outer cylinder; the inner cylinder 1 is made of a magnetic conductive material, an insulating layer 4 is arranged between the inner cylinder 1 and the electromagnetic induction heating coil 3, an air duct 5 which is coaxially arranged is arranged in the inner cylinder 1, the windward end of the air duct 5 is a protruding tip part 51, and an annular cavity gap 10 for overheating air is formed between the air duct 5 and the inner cylinder 1.
The working principle is as follows: after the electromagnetic induction heating coil 3 is electrified, according to the electromagnetic induction principle, the inner cylinder 1 made of magnetic conductive materials generates vortex, so that the inner wall of the hot air cylinder forms a heating surface, cold air entering from one end of the hot air cylinder rapidly heats up after passing through the hot air cylinder, the heating and warming effect is achieved, meanwhile, an air guide cylinder 5 which is arranged in the same axial direction is arranged in the inner cylinder 1, the windward end of the air guide cylinder 5 is a protruding tip part 51, an annular cavity gap 10 with overheated air is formed between the air guide cylinder 5 and the inner cylinder 1, namely, the inner cylinder 1 can be provided with a larger diameter, the flow of the overheated air is expanded, the air guide cylinder 5 which is arranged in the same axial direction ensures that the cold air is fully contacted with the heating surface of the inner cylinder 1, the heat conversion efficiency is improved, and the phenomenon of uneven heating is prevented.
In the structure of the electromagnetic heating device constituting the greenhouse,
optionally, the electromagnetic induction heating coil 3 is electrically connected with the PLC controller 6, the PLC controller 6 includes a temperature sensor 61 disposed in the hot air cylinder, so as to further improve the intelligent control effect of the heating device, the temperature sensor 61 is preferably disposed at the air outlet of the hot air cylinder, so as to monitor the heating effect in real time, adjust the air intake, the air speed and the power of the electromagnetic induction heating coil 3 in time, precisely control the heating temperature, and ensure the heating and warming effect of the greenhouse;
one end of the hot air cylinder is provided with an air guide channel 101, the other end of the hot air cylinder is provided with an air outlet 102, the air guide cylinder 5 is connected with the inner cylinder 1 through a plurality of supporting frames 50, and the tip part 51 of the air guide cylinder 5 is a conical surface or a spherical surface; namely, the front conical surface and the air duct 5 with the rear columnar structure are provided, the conical tip axially faces cold air flow, the air resistance when the cold air flows through is reduced, the cold air enters the annular cavity gap 10 between the guide duct and the inner barrel 1 through the guide duct tip part 51, the air density of a heating space is improved, and the heat emitted by the inner wall of the inner barrel 1 can be quickly and efficiently absorbed; when the tip 51 of the air duct 5 is spherical, the wind-shielding and turbulence-disturbing effect is achieved, the gas flowing state is changed from laminar flow to turbulent flow, and the gas heat exchange efficiency in the turbulent flow state is greatly higher than that in the laminar flow state.
Optionally, the air guide duct 101 of the hot air cylinder is connected with the axial flow fan 7 through a flange, the axial flow fan 7 is connected with the PLC controller 6 through the frequency converter 62, when the input end of the frequency converter 62 is connected with a power supply (commercial power 220V or 380V 50 HZ) and a hot air signal received by the temperature sensor 61 is lower than a set temperature, the output end of the frequency converter 62 outputs a high-frequency alternating current (more than 10 ten thousand HZ), so that the inner cylinder 1 itself rapidly heats, heat is rapidly accumulated on the inner surface of the hot air cylinder, and is conducted to cold air blown out by the axial flow fan 7, the air is rapidly heated, and when the temperature in the greenhouse reaches the set temperature, the PLC controller 6 sends an instruction to stop heating; the air quantity and the air speed of the axial flow fan 7 and the electrifying power of the electromagnetic induction heating coil 3 can be adjusted through the frequency converter 62, the flow and the temperature of hot air at the outlet of the hot air cylinder are adjusted, the hot air heating device has the characteristics of quick temperature rise, no open fire, easy power control and high degree of intelligence, and the temperature control precision can reach within plus or minus 1 ℃ in actual use;
the air outlet of the hot air cylinder is connected with an air supply pipeline through a flange plate 103, or the air outlet of the swing flange is used for transmitting hot air to each part of the greenhouse or uniformly dispersing the hot air to a longer distance;
furthermore, the spiral tooth sheets 8 are arranged on the surface of the inner wall of the inner cylinder 1 and/or the outer surface of the air guide cylinder 5, so that cold air entering the annular cavity 10 flows spirally, the air flow speed can be improved, the ventilation air quantity can be expanded, the heat exchange time can be prolonged, and the full and uniform heating can be realized, meanwhile, the spiral tooth sheets 8 arranged on the surface of the inner wall of the inner cylinder 1 are preferably integrally formed and are also made of magnetic conductive materials, so that the heating area can be obviously increased, and the heating efficiency and the heating effect are improved;
optionally, a heat insulation layer 9 is arranged between the outer cylinder 2 and the electromagnetic induction heating coil 3, the heat insulation layer 9 is made of ceramic fibers and is 10mm thick, electromagnetic induction heat is concentrated on the inner surface of the inner cylinder 1 due to the heat insulation effect of the heat insulation layer 9, heat is prevented from being dissipated outwards, the electric energy utilization efficiency is improved, the use cost is saved, operators are prevented from being burnt by the hot air cylinder, and the equipment is safer to use;
further, the inner cylinder 1 is made of a steel plate and has a thickness of 10 mm; the thickness of the insulating layer 4 is 2 mm; the electromagnetic induction heating coil 3 is preferably a copper core insulated wire, so that the leakage problem is prevented, and the safety performance is strong; the outer cylinder 2 is made of a stainless steel plate, has the thickness of 1mm, is preferably made of austenitic stainless steel materials, does not have a magnetic conduction effect, is corrosion-resistant and wear-resistant, and has a long service life; the air duct 5 is made of carbon steel, has the thickness of 2mm, and is suitable for practical application of heating in various greenhouses.
Claims (7)
1. The utility model provides a warmhouse booth's electromagnetic heating device which characterized in that: comprises a hot air cylinder body consisting of an inner cylinder, an outer cylinder and an electromagnetic induction heating coil arranged between the inner cylinder and the outer cylinder; the inner cylinder is made of a magnetic conductive material, an insulating layer is arranged between the inner cylinder and the electromagnetic induction heating coil, an air guide cylinder which is coaxially arranged is arranged in the inner cylinder, the windward end of the air guide cylinder is a protruding tip, and an annular cavity gap for overheating air is formed between the air guide cylinder and the inner cylinder.
2. The electromagnetic heating device of the greenhouse as claimed in claim 1, wherein: the electromagnetic induction heating coil is electrically connected with a PLC (programmable logic controller), and the PLC comprises a temperature sensor arranged in the hot air cylinder.
3. The electromagnetic heating device of the greenhouse as claimed in claim 1 or 2, wherein: one end of the hot air cylinder body is provided with an air guide channel, the other end of the hot air cylinder body is provided with an air outlet, the air guide cylinder is connected with the inner cylinder through a plurality of support frames, and the tip of the air guide cylinder is a conical surface or a spherical surface.
4. The electromagnetic heating device of the greenhouse as claimed in claim 3, wherein: the air guide duct of the hot air cylinder is connected with an axial flow fan through a flange plate, the axial flow fan is connected with a PLC (programmable logic controller) through a frequency converter, and the air outlet of the hot air cylinder is connected with an air supply pipeline through the flange plate.
5. The electromagnetic heating device of the greenhouse as claimed in claim 1, wherein: and spiral tooth sheets are arranged on the inner wall surface of the inner cylinder and/or the outer surface of the air guide cylinder.
6. The electromagnetic heating device of the greenhouse as claimed in claim 1, wherein: and a heat insulation layer is arranged between the outer cylinder and the electromagnetic induction heating coil, is made of ceramic fiber and has the thickness of 10 mm.
7. The electromagnetic heating device of the greenhouse as claimed in claim 1 or 6, wherein: the inner cylinder is made of a steel plate, and the thickness of the inner cylinder is 10 mm; the thickness of the insulating layer is 2 mm; the electromagnetic induction heating coil is a copper core insulated wire; the outer cylinder is made of a stainless steel plate and is 1mm thick; the air duct is made of carbon steel and has the thickness of 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120385583.XU CN214307616U (en) | 2021-02-22 | 2021-02-22 | Electromagnetic heating device of greenhouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120385583.XU CN214307616U (en) | 2021-02-22 | 2021-02-22 | Electromagnetic heating device of greenhouse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214307616U true CN214307616U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120385583.XU Active CN214307616U (en) | 2021-02-22 | 2021-02-22 | Electromagnetic heating device of greenhouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214307616U (en) |
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2021
- 2021-02-22 CN CN202120385583.XU patent/CN214307616U/en active Active
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