CN113271691A - Electric heating device with uniform thermal field - Google Patents
Electric heating device with uniform thermal field Download PDFInfo
- Publication number
- CN113271691A CN113271691A CN202110681913.4A CN202110681913A CN113271691A CN 113271691 A CN113271691 A CN 113271691A CN 202110681913 A CN202110681913 A CN 202110681913A CN 113271691 A CN113271691 A CN 113271691A
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- China
- Prior art keywords
- heat exchange
- electric
- thermal field
- pipe
- electric heating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0297—Heating of fluids for non specified applications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention relates to an electric heater, in particular to an electric heating device with a uniform thermal field, which comprises a plurality of electric heaters and also comprises: the heat preservation box is internally fixed with the electric heater; and the heat exchange tubes correspond to the electric heaters one by one, are wound on the electric heaters so as to form first pipelines and second pipelines which are alternately distributed on the electric heaters, and have different flow directions of heat exchange media in the first pipelines and the second pipelines. The electric heating device with the uniform thermal field improves the heat exchange coefficient through the spirally arranged heat exchange tubes, and has the advantages of uniform thermal field, low temperature of the heat exchange tubes, long service life and easy liquid drainage.
Description
Technical Field
The invention relates to an electric heater, in particular to an electric heating device with a uniform thermal field.
Background
The heat exchange tube of the existing radiant electric heater adopts a snake-shaped structure in a runway form, and the heating element adopts a heating wire, so that the radiant electric heater has the advantages that: the runway serpentine structure is easy to drain liquid and the electric heating element is easy to replace. The disadvantages are that: the runway serpentine structure has low heat exchange coefficient and high pipe wall temperature. In addition, the distances between the electric heating wires and the heat exchange tubes are unequal, the temperature of the heat exchange tubes close to the electric heating wires is high, the temperature of the heat exchange tubes far away from the electric heating wires is low, and the thermal field is uneven.
Disclosure of Invention
In order to solve the problems, the invention provides an electric heating device with a uniform thermal field, which has the advantages of uniform thermal field, high heat exchange coefficient and long service life, and the specific technical scheme is as follows:
an electric heating device with uniform thermal field comprises a plurality of electric heaters and further comprises: the heat preservation box is internally fixed with the electric heater; and the heat exchange tubes correspond to the electric heaters one by one, are wound on the electric heaters so as to form first pipelines and second pipelines which are alternately distributed on the electric heaters, and have different flow directions of heat exchange media in the first pipelines and the second pipelines.
By adopting the technical scheme, the medium flow direction is opposite, namely the liquid inlet flow direction and the liquid outlet flow direction are opposite, the heat field is uniform, the fluid generates secondary flow in the spiral pipe, the heat exchange coefficient is high, the temperature of the heat exchange pipe is low, the temperature of the electric heater is also low, and the service life of the whole system is longer.
Preferably, when the heat exchange tube is spirally wound, the heat exchange tube is symmetrically bent into a U shape, then the U-shaped heat exchange tube is spirally bent to form a first pipeline and a second pipeline which are alternately distributed, and an inlet and an outlet of the heat exchange tube are both positioned at the same end of the electric heater.
By adopting the technical scheme, the heat exchange tube is symmetrically bent into the U shape, and then the U-shaped tube is spirally bent to form a spiral tube, so that the liquid inlet and the liquid outlet are staggered, and the thermal field is uniform.
Further, the method also comprises the following steps: the distribution pipe is communicated with the inlet of the heat exchange pipe; the collecting pipe is communicated with the outlet of the heat exchange pipe; the liquid inlet pipe is communicated with the distribution pipe; the liquid outlet pipe is communicated with the collecting pipe; the liquid inlet pipe and the liquid outlet pipe are both fixed on the heat preservation box, and one end of each liquid inlet pipe and one end of each liquid outlet pipe are both located outside the heat preservation box.
Through adopting above-mentioned technical scheme, drain pipe and feed liquor pipe easy to assemble.
Further, the electric heater is an electric heating wire, an electric heating pipe or a cluster type electric heating pipe.
By adopting the technical scheme, the spirally arranged heat exchange tubes are uniformly wound on the heating wires, the electric heating tubes and the cluster type electric heating tubes, so that the thermal field is uniform.
Preferably, the heat exchanger further comprises a first temperature sensor and a power regulator for collecting the temperature of liquid at the outlet of the heat exchange tube, wherein the first temperature sensor is arranged at the outlet of the heat exchange tube, and the power regulator is respectively connected with the electric heater and the first temperature sensor and is used for controlling the heating power of the electric heater according to the temperature.
Through adopting above-mentioned technical scheme, first temperature sensor and power regulator cooperation make the medium keep the constant temperature to carry.
Preferably, the heat exchanger further comprises a second temperature sensor for collecting the temperature of liquid in the heat exchange tube, and the second temperature sensor is arranged on the heat exchange tube and connected with the power regulator.
Through adopting above-mentioned technical scheme, second temperature sensor is used for preventing the heat exchange tube high temperature, protects the heat exchange tube.
The electric heaters are vertically distributed in the heat insulation box, and the heat exchange tubes are spirally arranged along a vertical axis.
Through adopting above-mentioned technical scheme, the heat pipe flowing back of vertical setting is easy.
Preferably, the inside of the heat insulation box is filled with nitrogen.
By adopting the technical scheme, the nitrogen can prevent the heat exchange tube and the electric heater from being oxidized.
Preferably, the electric heater further comprises an explosion-proof junction box, and the explosion-proof junction box is installed on the electric heater.
Preferably, the electric heater is fixed on the heat insulation box through a flange.
Compared with the prior art, the invention has the following beneficial effects:
the electric heating device with the uniform thermal field improves the heat exchange coefficient through the spirally arranged heat exchange tubes, and has the advantages of uniform thermal field, low temperature of the heat exchange tubes, long service life and easy liquid drainage.
Drawings
FIG. 1 is a cross-sectional view of a front view of an electrical heating apparatus with a uniform thermal field;
FIG. 2 is a cross-sectional side view of an electrical heating apparatus with a uniform thermal field;
fig. 3 is a cross-sectional view of a top view of an electrical heating device with a uniform thermal field.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, an electric heating apparatus with a uniform thermal field includes an electric heater 3, an incubator 1, heat exchange tubes 2, distribution tubes 61, a collecting tube 71, a liquid outlet tube 72, and a liquid inlet tube 62.
A plurality of electric heaters 3 and heat exchange tubes 2 are arranged, and the electric heaters 3 are fixed in the heat insulation box 1; the heat exchange tube 2 is spirally arranged, an inlet 23 and an outlet 24 of the heat exchange tube 2 are both positioned at the same end, the other end of the heat exchange tube 2 is U-shaped and revolved to form two tubes which are wound at intervals, the heat exchange tube 2 is vertically arranged, and the heat exchange tube 2 is sleeved on the electric heater 3; the distribution pipe 61 is connected with the inlet 23 of the heat exchange pipe 2; the liquid inlet pipe 62 is connected with the distribution pipe 61; the manifold 71 is connected to the outlet 24 of the heat exchange tube 2. The drain pipe 72 is connected to the manifold 71. The heat exchange tube 2 is symmetrically bent into a U shape firstly, and then the U-shaped tube is spirally bent to form a spiral tube, so that liquid inlet and liquid outlet are staggered, a thermal field is uniform, fluid generates secondary flow in the spiral tube, the heat exchange coefficient is high, the temperature of the heat exchange tube 2 is low, the temperature of the electric heater 3 is also low, and the service life of the whole system is longer.
Specifically, the heat exchange tube 2 comprises a first tube 21 and a second tube 22 which are both spiral tubes, one end of the first tube 21 is an inlet of the heat exchange tube 2, the other end of the first tube is communicated with one end of the second tube 22 and is connected in a U shape, the other end of the second tube 22 is an outlet of the heat exchange tube 2, the first tube 21 and the second tube 22 are coaxial and are arranged at intervals, and the inlet and the outlet are both located at the same end of the electric heater.
The liquid outlet pipe 72 and the liquid inlet pipe 62 are convenient to install.
The vertically arranged heat pipe has easy liquid drainage.
Wherein, the electric heater 3 is a heating wire, an electric heating tube or a cluster type electric heating tube. Because the heat exchange tube 2 is spirally wound on the electric heater 3, and the spiral tube is spirally wound at equal intervals, the heat exchange tube 2 is heated uniformly, so that the thermal field is more uniform.
The heat exchange tube heat exchanger further comprises a first temperature sensor and a power regulator, wherein the first temperature sensor is installed on the collecting tube 71 and used for collecting the liquid temperature at the outlet of the heat exchange tube, and the power regulator is connected with the electric heater 3 and the first temperature sensor respectively and used for controlling the heating power of the electric heater 3 according to the temperature.
The first temperature sensor is matched with the power regulator to keep the medium to be conveyed at a constant temperature.
The heat exchange tube can further comprise a second temperature sensor, wherein the second temperature sensor is arranged on the heat exchange tube 2, is connected with the power regulator and is used for collecting the temperature of liquid in the heat exchange tube. The second temperature sensor is used for preventing the temperature of the heat exchange tube 2 from being too high and protecting the heat exchange tube 2.
In some embodiments, the interior of the incubator 1 is filled with nitrogen gas. The nitrogen gas can prevent the heat exchange pipe 2 and the electric heater 3 from being oxidized.
In some embodiments, an explosion-proof junction box 4 is further included, and the explosion-proof junction box 4 is mounted on the electric heater 3.
In some embodiments, the heating device further comprises a flange 5, the electric heater 3 is fixed on the flange 5, and the flange 5 is fixed on the heat preservation box 1. The electric heater 3 with the flange 5 is convenient to disassemble and assemble, and the sealing performance of the heat preservation box 1 can be ensured.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (10)
1. The utility model provides an electric heater unit of even thermal field, includes a plurality of electric heaters, its characterized in that still includes:
the heat preservation box is internally fixed with the electric heater; and
the heat exchange tubes correspond to the electric heaters one by one, are wound on the electric heaters so as to form first pipelines and second pipelines which are alternately distributed on the electric heaters, and flow directions of heat exchange media in the first pipelines and the second pipelines are different.
2. An electric heating apparatus with a uniform thermal field according to claim 1,
when the heat exchange tubes are spirally wound, the heat exchange tubes are symmetrically bent into a U shape, then the U-shaped heat exchange tubes are spirally bent to form first pipelines and second pipelines which are alternately distributed, and the inlets and the outlets of the heat exchange tubes are located at the same end of the electric heater.
3. An electric heating apparatus with a uniform thermal field as defined in claim 2, further comprising:
the distribution pipe is communicated with the inlet of the heat exchange pipe;
the collecting pipe is communicated with the outlet of the heat exchange pipe;
the liquid inlet pipe is communicated with the distribution pipe; and
the liquid outlet pipe is communicated with the collecting pipe;
the liquid inlet pipe and the liquid outlet pipe are both fixed on the heat preservation box, and one end of each liquid inlet pipe and one end of each liquid outlet pipe are both located outside the heat preservation box.
4. The electric heating device with the uniform thermal field as claimed in claim 2, further comprising a power regulator and a first temperature sensor for collecting the temperature of the liquid at the outlet of the heat exchange tube, wherein the first temperature sensor is installed at the outlet of the heat exchange tube, and the power regulator is respectively connected with the electric heater and the first temperature sensor and is used for controlling the heating power of the electric heater according to the temperature.
5. The electric heating device with the uniform thermal field of claim 4, further comprising a second temperature sensor for collecting the temperature of the liquid inside the heat exchange tube, wherein the second temperature sensor is mounted on the heat exchange tube and connected with the power regulator.
6. An electric heating apparatus with a uniform thermal field as claimed in any one of claims 1 to 5, wherein the electric heater is a heating wire, an electric heating pipe or a cluster electric heating pipe.
7. The electric heating device with the uniform thermal field as claimed in claims 1 to 5, wherein the electric heaters are vertically distributed in the heat preservation box, and the heat exchange tubes are spirally arranged along a vertical axis.
8. An electric heating apparatus with a uniform thermal field as claimed in any one of claims 1 to 5, wherein the inside of said thermal container is filled with nitrogen gas.
9. An electric heating apparatus of uniform thermal field as claimed in any of claims 1 to 5 further comprising an explosion-proof junction box mounted on said electric heater.
10. An electric heating apparatus with uniform thermal field as claimed in any one of claims 1 to 5, wherein said electric heater is fixed to said thermal insulation box by means of a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110681913.4A CN113271691A (en) | 2021-06-19 | 2021-06-19 | Electric heating device with uniform thermal field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110681913.4A CN113271691A (en) | 2021-06-19 | 2021-06-19 | Electric heating device with uniform thermal field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113271691A true CN113271691A (en) | 2021-08-17 |
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ID=77235427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110681913.4A Pending CN113271691A (en) | 2021-06-19 | 2021-06-19 | Electric heating device with uniform thermal field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113271691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116425113A (en) * | 2023-02-23 | 2023-07-14 | 浙江工业大学 | Electric heating type ammonia hydrogen production reactor |
-
2021
- 2021-06-19 CN CN202110681913.4A patent/CN113271691A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116425113A (en) * | 2023-02-23 | 2023-07-14 | 浙江工业大学 | Electric heating type ammonia hydrogen production reactor |
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Address after: No. 89, Ximei Road, Xinwu District, Wuxi City, Jiangsu Province, 214000 Applicant after: Wuxi Huaneng Electric Heating Equipment Co.,Ltd. Address before: No. 89, Ximei Road, Xinwu District, Wuxi City, Jiangsu Province, 214000 Applicant before: HUANENG WUXI ELECTROTHERMAL EQUIPMENT Co.,Ltd. |