Electric heating device for maintaining air constant temperature in industrial drying room

Abstract

The invention relates to an electric heating device for maintaining constant temperature of air in a drying room, which is characterized by comprising an electric heating plate, a thermal insulation layer, a box body and a fan, wherein the electric heating plate is arranged in the box body and comprises an electric heating layer, a fixing layer and an insulating heat conduction layer, the insulating heat conduction layer is attached to the outer portions of the two faces of the electric heating layer, and the fixing layer is arranged on the outer portions of the two faces or the outer portion of one face of the insulating heat conduction layer; and the fan is connected with the box body. Compared with the prior art, the low-voltage heating assembly is used for replacing a resistance wire heating pipe, the mode of the heating section and the supporting section is adopted, the heating section is used for transferring heat and heating surrounding air, and the supporting section is used for maintaining the mechanical strength and transferring current. Due to the fact that the heating area of the low-voltage electric heating assembly is increased, the air heat transfer area is correspondingly increased, insulation is thin, thermal resistance is small, operation parameters are optimized, temperature control is accurate, heating speed is high, heat loss is small, and energy consumption is saved.

Description

Technical Field

[0001] The invention relates to a heating device of a low-voltage and high-current heating component, in particular to an electric heating device for drying industrial materials and degassing high-voltage cables to maintain a constant air temperature. Background Art

[0002] At present, the electric heating for heating air and keeping the air at a constant temperature for drying industrial materials and degassing high-voltage cables still uses heating tubes made of resistance wires. The resistance wire heating tubes are based on 380V and 220V resistance wires to heat the outer wrapped tube body and then heat the heated air after breaking through the thick insulation. This indirect heating has large thermal resistance, small heating area of ​​the resistance wire, low heat transfer efficiency, and is not conducive to saving electricity. The disadvantages of the heating method of the resistance wire heating tube in the traditional drying and degassing heating device include:

[0003] After the electric energy is converted into heat energy, it needs to transfer heat to the air by conduction and radiation. Therefore, after the resistance wire is energized and heated, it needs to heat the thick insulation. The insulation absorbs heat and transfers the heat to the heating tube. The heating tube achieves the purpose of heating the air by contacting with the air. Since the heating area of ​​the resistance wire is small, the thermal resistance is large, the heat transfer is slow, and the heat transfer efficiency is low, resulting in high energy consumption. In addition, since the resistance wire is wrapped in a thick insulation and metal tube wall, the indirect heat transfer is slow, the temperature difference between the inner resistance wire and the outer tube wall is large, and the heating power is small. When the temperature of the resistance wire is low, the heating speed will be slow and the heat transfer temperature will be low. If fast heating conditions or higher temperature conditions are required, the power needs to be increased and the temperature of the resistance wire is super high, which will cause the resistance wire to age quickly at high temperature and burn out easily. Therefore, the resistance wire heating tube needs to be replaced irregularly, and the service life is low, about 6 months. Due to slow heat transfer, the high-temperature resistance wire is easy to burn out, and it cannot be adapted to some occasions that require faster heating or higher temperature heating. Low thermal efficiency and high energy consumption are not conducive to energy saving. Summary of the invention

[0004] The purpose of the present application is to provide an electric heating device for drying industrial materials and degassing high-voltage cables, which has fast heat transfer, high thermal efficiency, and long service life and can adapt to situations where heating is performed at a relatively fast speed or at a relatively high temperature, thereby ensuring heating efficiency while improving energy-saving efficiency.

[0005] The present application discloses an electric heating device for maintaining a constant temperature of air in a drying room, the heating device comprising: an electric heating plate, a thermal insulation layer, a box, a fan and a remote control data optimization display control system; wherein the electric heating plate is arranged inside the box, and comprises: an electric heating layer, a fixing layer and an insulating heat-conducting layer, the electric heating layer is a low-voltage and high-current electric heating component, and the voltage adopted is 1V-110V, the insulating heat-conducting layer is attached to the outside of both sides of the electric heating layer, and the fixing layer is arranged on the outside of both sides or on the outside of one side of the insulating heat-conducting layer; the thermal insulation layer comprises: a soft thermal insulation layer and a soft thermal insulation outer shell, wherein the soft thermal insulation layer is arranged on the outside of the box, the soft thermal insulation outer shell is arranged on the outside of the nano soft thermal insulation layer, and the fan is connected to an opening on one side of the box.

[0006] In a preferred embodiment, the box body has openings on two sides.

[0007] In a preferred example, one side opening of the box body is connected to the air outlet of the fan.

[0008] In a preferred example, the heating component also includes an artificial intelligence PID temperature automatic control system, proprietary configuration software, a display system, a remote monitoring big data accumulation optimization energy-saving control system, an isolation transformer, etc.

[0009] In a preferred embodiment, during installation, the 380V or 220V power supply is connected to the transformer, converted to a low voltage of 1V-110V, and then connected to a low voltage and high current heating element, and then connected back to the transformer. The electric heating element includes a heating section and a supporting section, and the supporting section is connected to the heating section.

[0010] In a preferred example, the thickness of the insulating layer is 0.1 mm-10 mm, and the materials used include mica paper, board, high-silica woven fabric, glass fiber products, ceramic products and mineral products.

[0011] In a preferred example, the thickness of the fixing layer is 1 mm-10 mm, and the material used includes one or a combination of metal materials and standard materials of insulating mineral products.

[0012] In a preferred example, the electric heating plates are regularly arranged in columns in the box.

[0013] In a preferred example, the material for making the heating element includes various metal plates, with high temperature resistant alloy plates and high temperature resistant stainless steel plates as the main materials.

[0014] In a preferred example, the heating device includes one or more artificial intelligence PID temperature automatic control system, proprietary configuration software, display system, remote monitoring big data accumulation optimization energy-saving control system, isolation transformer, etc.

[0015] The heating device of the present invention has the following advantages:

[0016] 1) Compared with the existing resistance wire heating device, the technical scheme of the present invention can greatly save energy consumption, and the saving ratio is at least 20%. The original resistance wire heating device uses a heating voltage of 380V or 220V AC, which requires a thicker thickness of the insulation layer, so its energy consumption is high. On the other hand, a higher voltage has the risk of leakage and electric shock. The lower the voltage level, the lower the requirement for the insulation material. The insulation material is generally heat-insulating, which is not conducive to the transmission of heat. Therefore, the thinner insulation layer is treated with superconducting materials to improve the heat transfer efficiency, avoid the heating body from being in a high temperature state for a long time, and indirectly increase the service life of the heating body. The present invention adopts low-voltage heating, such as 20V voltage heating. Its insulation material and superconducting heat treatment material can be very thin, such as 0.2mm, 0.3mm, etc., which can meet the requirements. The temperature of the heating section is low and close to the working temperature, the heat transfer speed is extremely fast, and the heat generation and the heat absorption of the object to be heated basically reach 1 to 0.9 or more, and the heat waste is small. Only less heat is needed to achieve a better heating effect. In addition, the use of low-voltage isolation transformers makes it safer, and even if there is leakage, there will be no risk of electric shock. Low-voltage heating can improve heat utilization efficiency and save power costs, making it more economical.

[0017] 2) Replacing the original resistance wire heating tube with a low-voltage heating component can greatly save energy consumption. The existing resistance wire heating tube and block are heated by placing the resistance wire outer tube and block close to the heating device. The present invention uses a low-voltage heating component to replace the resistance wire heating tube block, and adopts a heating section and a support section method. The support section is connected to the heating section, wherein the heating section transfers heat and is close to the insulating layer and heats the object to be heated. The support section maintains mechanical strength and tightness and transfers current. Since the heating section is made of a plurality of strip-shaped conductive strips, compared with the heating method of the resistance wire, the conductive strip improves the heat dissipation problem of the circular heating tube (for example, single-head electric heating tube, resistance wire) to a certain extent. The circular electric heating tube or block needs to be heated by the internal resistance wire and then point-to-point contact with the surface of the heated object for heat transfer, which is indirect heat transfer and has a small heat transfer area. The heating strip itself is a heating element and is in surface-to-surface contact, which is direct heat transfer, with high fit and large heat transfer area. The conductive strip is low voltage, the insulation layer is thin, the thermal resistance is small, and the heat transfer area is large, which makes the heat transfer speed fast, the heat loss is small, and the energy consumption is saved.

[0018] 3) Compared with the prior art, the present invention can ensure that the power saving rate reaches about 80% during use, and the power saving rate of maintaining the constant temperature after reaching the constant temperature is about 50%. In addition, the heating temperature rise rate of the present invention is also increased by about 90%.

[0019] The specification of the present application records a large number of technical features, which are distributed in various technical solutions. If all possible combinations of technical features of the present application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of the present application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions should all be regarded as having been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be regarded as having been recorded because it is technically infeasible, and the solution of A+B+C+E should be regarded as having been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional diagram of the heating device according to the present invention;

[0021] Figure 2 It is a schematic diagram of an exploded view of the electric heating plate of the heating device described in the present invention.

[0022] Figure 3 A diagram showing the combination of a housing and an electric heating plate of the heating device according to the present invention.

[0023] Description of reference numerals:

[0024] 1-electric heating plate; 2-soft insulation layer; 3-soft insulation shell; 4-fan; 5-box; 6-electric heating layer; 7-fixing layer; 8-insulating heat-conducting layer. DETAILED DESCRIPTION

[0025] After in-depth research and extensive screening, the inventor of the present application has developed an electric heating device for maintaining a constant temperature of the air. Compared with the prior art, the present application replaces the resistance wire heating tube with a 1V-110V low-voltage heating component with a rational design, which can greatly save energy consumption. The existing resistance wire heating is to heat the surface of the device to be heated by transferring heat to the outer heating tube wrapped with the resistance wire. The present invention uses a low-voltage heating component to replace the resistance wire heating tube, block, etc., and adopts a heating section and a supporting section. The supporting section is connected to the heating section, wherein the heating section transfers heat and is close to the insulating layer and heats the object to be heated. The supporting section maintains mechanical strength and transfers current. Since the heating section is made of a plurality of strip-shaped conductive strips, compared with the heating method of the resistance wire, the conductive strip improves the heat dissipation problem of the circular heating tube (for example, a single-head electric heating tube, a resistance wire) to a certain extent. The round electric heating tube or block needs to be heated by the internal resistance wire and then contact the surface of the heated object point to point for heat transfer, which is indirect heat transfer and has a small heat transfer area. The heating strip itself is the heating element and is in surface to surface contact, which is direct heat transfer, with high fit and large heat transfer area. The conductive strip is low voltage, the insulation layer is thin, the thermal resistance is small, and the heat transfer area is large, which makes the heat transfer speed fast, the heat loss is small, and energy saving.

[0026] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0027] Example

[0028] An embodiment of the present invention for use in a drying room is as follows Figures 1 to 3 As shown, the heating device comprises: an electric heating plate 1, a heat preservation layer 2, a box 5 and a fan 4.

[0029] The electric heating plate 1 is arranged inside the box 5, and includes: an electric heating layer 6, a fixed layer 7 and an insulating heat-conducting layer 8. The electric heating layer 6 is a low-voltage and high-current electric heating component. The heating voltage used by the heating component is 1V to 110V. The thickness of the insulating heat-conducting layer 8 is 0.1mm-10mm, which is attached to the double-sided exterior of the electric heating layer. The fixed layer 7 is arranged on the double-sided exterior or the single-sided exterior of the insulating heat-conducting layer 8. Optionally, in one embodiment, the electric heating plate 1 is regularly arranged in the box 5. Optionally, in another embodiment. The number of the electric heating plates 1 includes one or more. Optionally, in another embodiment, the material used by the heating component includes metal materials and alloy materials. Optionally, in another embodiment, the electric heating layer 6 includes a heating section and a supporting section, and the supporting section is connected to the heating section. Optionally, in another embodiment. The insulating heat-conducting layer 8 materials include: mica paper, board, high silica woven fabric, glass fiber products, ceramic products and mineral products. Optionally, in one embodiment, the fixing layer 7 has a thickness of 1-10 mm.

[0030] The thermal insulation layer includes: a soft thermal insulation layer 2 and a soft thermal insulation shell 3, wherein the soft thermal insulation layer 2 is arranged outside the box 5, the soft thermal insulation shell 3 is arranged outside the nano soft thermal insulation layer, and the fan is connected to the box 5. Optionally, in one embodiment, the thermal insulation layer further includes a hard thermal insulation layer, and the hard thermal insulation layer is arranged between the soft thermal insulation layer 2 and the soft thermal insulation shell 3.

[0031] The fan 4 is connected to the box 5. Optionally, in one embodiment, the fan 4 includes one or more fans, and is connected to the box.

[0032] This embodiment is applied to cable degassing in a drying room. The set temperature is 75 degrees Celsius. It takes about 45 minutes to heat the drying room to the required temperature, and the energy saving ratio is greater than 50%.

[0033] Optionally, in one embodiment, the present invention also includes a remote control data optimization display control system, which includes an artificial intelligence PID temperature automatic control system, proprietary configuration software, a display system, a remote monitoring big data accumulation optimization energy-saving control system, an isolation transformer, etc., and the number includes one or more.

[0034] Table 1 is a comparison of the speed-up and power-saving data of ordinary resistance heating tubes and the low-voltage and high-current electric heating of the present invention:

[0035]

[0036] Table 1

[0037] It can be seen from Table 1 that by using the low-voltage, high-current air thermostat of the present invention, the heating rate is increased by 90%, and the power required to maintain the constant temperature is also saved by 56%. Not only that, the increase in the heating rate also ensures the reduction of the time required for drying, and further nodes are also performed. The power saving data in this regard is not counted in the table. Therefore, by using the present invention, the efficiency of power saving and speed increase can be greatly improved.

[0038] Table 2 is a comparison of the power saving effect of the degassing chamber in the drying room in the embodiment before and after the data

[0039] time Electricity meter reading Timer reading Average power consumption / hour (KW) Before power saving December 3 - March 25, 2022 0-20315.2kw 0-1208 hours 58kw After power saving August 6, 2022 - January 11, 2023 96944.4-122649.6 2578.53-5101.53 10.1kw

[0040] Table 2

[0041] It can be seen from Table 2 that by using the low-voltage, high-current device of the present invention, the power saving rate can reach about 82%.

[0042] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements. In the application documents of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0043] This specification includes combinations of the various embodiments described herein. Individual references to "one embodiment" or a particular embodiment, etc., do not necessarily refer to the same embodiment; however, these embodiments are not mutually exclusive unless indicated as mutually exclusive or clear to those skilled in the art. It should be noted that the word "or" is used in this specification in a non-exclusive sense unless the context clearly indicates or requires otherwise.

[0044] All documents mentioned in this application are considered to be included in the disclosure of this application as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. An electric heating device for maintaining a constant temperature of air in a drying room, characterized in that: The heating device includes: an electric heating plate, an insulation layer, a box, a fan and a remote control data optimization display control system; wherein, the electric heating plate is arranged inside the box, and includes: an electric heating layer, a fixing layer and an insulating heat-conducting layer, the electric heating layer is a low-voltage and high-current electric heating component, and the voltage adopted is 1V-60V, the insulating heat-conducting layer is attached to the outside of both sides of the electric heating layer, and the fixing layer is arranged on the outside of both sides or one side of the insulating heat-conducting layer; the insulation layer includes: a soft insulation layer and a soft insulation shell, wherein the soft insulation layer is arranged on the outside of the box, the soft insulation shell is arranged on the outside of the nano soft insulation layer, and the fan is connected to an opening on one side of the box.

2. The heating device according to claim 1, characterized in that The box body has openings on two sides.

3. The heating device according to claim 2, characterized in that: One side opening of the box body is connected to the air outlet of the fan.

4. A heating device according to claim 1, characterized in that: The heating component also includes an artificial intelligence PID temperature automatic control system, proprietary configuration software, a display system, a remote monitoring big data accumulation optimization energy-saving control system, an isolation transformer, etc.

5. The heating device according to claim 1, characterized in that: During installation, the 380V or 220V power supply is connected to the transformer, which is converted into a low voltage of 1V-110V and then connected to the low voltage and high current heating element. The electric heating element includes a heating section and a supporting section, and the supporting section is connected to the heating section.

6. A heating device according to claim 1, characterized in that: The thickness of the insulating heat-conducting layer is 0.1 mm-10 mm, and the material used includes one or a combination of mica paper, board, high-silica woven fabric, glass fiber products, ceramic products and mineral products.

7. A heating device according to claim 1, characterized in that: The thickness of the fixing layer is 1 mm-10 mm, and the material used includes one or a combination of metal materials and standard materials of insulating mineral products.

8. A heating device according to claim 1, characterized in that: The electric heating plates are regularly arranged in a column in the box.

9. A heating device according to claim 1, characterized in that: The materials for making the heating element include various metal plates, with high temperature resistant alloy plates and high temperature resistant stainless steel plates as the main materials.

10. A heating device according to claim 1, characterized in that: The heating device includes an artificial intelligence PID temperature automatic control system, proprietary configuration software, a display system, a remote monitoring big data accumulation optimization energy-saving control system, an isolation transformer, etc., and the number includes one or more.

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