CN216011274U - Air duct heater - Google Patents
Air duct heater Download PDFInfo
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- CN216011274U CN216011274U CN202122030172.1U CN202122030172U CN216011274U CN 216011274 U CN216011274 U CN 216011274U CN 202122030172 U CN202122030172 U CN 202122030172U CN 216011274 U CN216011274 U CN 216011274U
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- heat insulation
- heating
- copper bar
- air duct
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Abstract
The utility model relates to the technology of an electric heating heat exchanger, and aims to provide an air duct heater. Comprises a flange plate, a bracket clapboard and a plurality of tubular heating elements; the heat insulation structure comprises a heat insulation layer clapboard parallel to the bracket clapboard, heat insulation cotton filled between the flange plate and the heat insulation layer clapboard, and a heat insulation cover surrounding the flange plate and the outer edge of the heat insulation layer clapboard; the terminal of the heating element penetrates through the heat insulation structure and then is fixed on the flange plate; the junction box is arranged on the outer side of the flange plate relative to the heat insulation structure, and a temperature controller and a copper bar are arranged in the junction box; the temperature controller is respectively connected with the copper bar and the thermocouple through leads, and the copper bar is connected with the wiring ends of the heating elements through leads. The utility model can avoid the dissipation of internal heat and save energy consumption to the maximum extent. The service life of the electric wiring and control end is prolonged, and the shutdown loss caused by equipment failure or damage is reduced; the assembly and disassembly are convenient, the installation is convenient, the overhaul is easy, the operation is stable, and the failure rate is low.
Description
Technical Field
The utility model relates to the technology of an electric heating heat exchanger, in particular to an air duct heater.
Background
The duct heater is typically used for heating the air in the duct. Due to installation requirements, duct heaters typically include a flange and several sets of heating tubes, each mounted side-by-side on the flange with fasteners. When the air duct heater is used, the air duct heater is vertically inserted into the air duct and transversely arranged in the air duct, and then the air duct heater is installed on the air duct through the flange matching and the fastening device.
However, the heating tubes of the conventional duct heaters are usually directly mounted on the flange, and in actual operation, a large amount of heat generated by the heating tubes is conducted out of the flange itself. This not only results in heater heat loss and power loss; and the electric connection and control ends outside the flange can be exposed in a high-temperature environment for a long time, and faults or damages are caused after the electric connection and control ends are heated and aged.
In addition, in the existing air duct heater product, cables led out from pipe orifices of heating pipes are usually directly connected in parallel or in series, and then are connected with a device bus cable to realize power supply. The circuit connection mode has the problems of disordered circuit arrangement, easy connection failure, overheating and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defects in the prior art and provides an air duct heater.
In order to solve the technical problem, the solution of the utility model is as follows:
an air duct heater is provided, which comprises a flange plate, a bracket clapboard and a plurality of tubular heating elements; the two supports are respectively arranged at the two end parts at the same side of the flange plate; at least one support partition is arranged in the vertical direction between the two supports, the terminals of the heating element pass through the support partition and the flange plate and are fixed on the flange plate by the pipe orifice parts
This wind channel heater still includes: the heat insulation structure comprises a heat insulation layer clapboard parallel to the bracket clapboard, heat insulation cotton filled between the flange plate and the heat insulation layer clapboard, and a heat insulation cover surrounding the flange plate and the outer edge of the heat insulation layer clapboard; the terminal of the heating element penetrates through the heat insulation structure and then is fixed on the flange plate; the junction box is arranged on the outer side of the flange plate relative to the heat insulation structure, and a temperature controller and a copper bar are arranged in the junction box; the temperature controller is respectively connected with the copper bar and the thermocouple through leads, and the copper bar is connected with the wiring ends of the heating elements through leads.
As an improvement, the heating element is a straight-through electric heating tube with a single wiring end, a U-shaped electric heating tube with a double wiring end, or a multi-segment folding electric heating tube with a double wiring end; the tail end of the wiring end of the heating pipe is provided with a heating pipe orifice joint which is used for being matched with a fastener to fix the wiring end at the mounting hole of the flange plate; the heating element is also provided with a heating pipe tail joint for installing and positioning the insulating layer partition plate and plugging the installation hole; between the heating pipe orifice joint and the heating pipe tail joint of the heating element, a cold section which does not generate heat is arranged.
As an improvement, the terminal of the heating element is inserted through the mounting holes of the heating pipe joint gasket and the flange plate, and the flange plate and the heating pipe joint gasket are pressed against the heating pipe orifice joint by the heating pipe joint fastener.
As an improvement, high-temperature silica gel is arranged between the tail joint of the heating pipe and the partition plate of the heat-insulating layer and used for sealing and installing the pore.
As an improvement, the temperature measuring device also comprises a temperature measuring pipe penetrating through the heat insulation structure; the single end of the temperature measuring pipe is closed, the opening end of the temperature measuring pipe is fixed on the flange plate, the thermocouple is installed in the temperature measuring pipe, and the wiring end of the thermocouple is connected to the temperature controller through a wire.
As an improvement, the copper bar is fixed on the flange plate through a plurality of copper bar supporting pieces, and an insulating column is arranged between the copper bar and the copper bar supporting pieces.
As an improvement, a flange plate and a flange blind plate are respectively arranged on the upper end surface and the lower end surface of the junction box; the glan plate is provided with a glan head for connecting an external power supply through a cable, and the inner end part of the glan head is connected to the temperature controller through a lead.
As an improvement, the junction box is provided with a grounding post, one end of the grounding post is fixed on the flange plate, and the other end of the grounding post is connected to a gland head on a gland plate arranged on the end face of the junction box through a lead.
As an improvement, the terminal of the heating element is fixedly installed by a heating pipe joint fastener; wherein, the wiring end of heating element is equipped with the external screw thread, and heating tube connects the fastener and is equipped with the internal thread that matches with it.
As an improvement, a plurality of lifting lugs are arranged on the upper sides of the bracket and the flange plate.
Compared with the prior art, the utility model has the beneficial effects that:
1. the air duct heater can avoid the internal heat loss and save the energy consumption to the maximum extent.
2. The structural design of the utility model can prolong the service life of the electric wiring and control end and reduce the shutdown loss caused by equipment failure or damage.
3. The air duct heater can be conveniently disassembled and assembled, can realize the replacement of the heating element in a short time or realize the modularized replacement, and greatly saves the equipment maintenance cost.
4. The utility model realizes the connection of each heating element and the temperature controller by using the copper bar in the junction box, and has convenient installation, easy maintenance, stable operation and low failure rate.
Drawings
FIG. 1 is a front view of a product of the present invention;
FIG. 2 is a perspective view of a product of the present invention;
FIG. 3 is a reverse side view of the product of the present invention;
FIG. 4 is a heating element of the present invention;
FIG. 5 is a schematic view of the installation of the heating element;
fig. 6 is an enlarged view of a portion of the spacer structure of the stent.
Reference numerals in the drawings: junction box 1, flange plate 2, heat preservation cover 3, heat preservation layer partition plate 4, support 5, support partition plate 6, heating element 7, heating pipe mouth of pipe joint 8, heating pipe tail joint 9, heat preservation cotton 10, temperature tube 11, heating pipe joint fastener 12, heating pipe joint gasket 13, temperature controller 14, wire 15, copper bar 16, copper bar support piece 17, insulating column 18, glan plate 19, glan head 20, junction box gasket 21, glan blind plate 22, ground post 23, temperature control support 24, high temperature silica gel 25, lug 26.
Detailed Description
The following describes embodiments of the present invention in detail by way of specific examples.
As shown in the figure, the air duct heater comprises a flange plate 2, a bracket 5, a bracket clapboard 6, a plurality of tubular heating elements 7, a heat preservation structure and a junction box 1; the brackets 5 are arranged up and down and are respectively arranged at the two end parts of the flange plate 2 and are positioned at the same side; a plurality of lifting lugs 26 are arranged on the upper side of the bracket 5 and the flange plate 2. Three support partitions 6 are arranged in parallel in the vertical direction between the two supports 5.
The heat preservation structure comprises a heat preservation layer clapboard 4 parallel to a bracket clapboard 6, heat preservation cotton 10 filled between a flange plate 2 and the heat preservation layer clapboard 4, and a heat preservation cover 3 surrounding the flange plate 2 and the outer edge of the heat preservation layer clapboard 4; the heating element 7 is fixed on the flange plate by the pipe orifice part after the wiring terminal passes through the mounting hole on the bracket clapboard 6, the heat preservation structure and the mounting hole of the flange plate.
The junction box 1 is arranged on the outer side of the flange plate 2 relative to the heat insulation structure, and a temperature controller 14 and a copper bar 16 are arranged in the junction box; the temperature controller 14 is fixed on the flange plate 2 through a temperature control bracket 24 and is respectively connected with the copper bar 16 and the thermocouple through leads 15, and the copper bar 16 is connected with the wiring terminal of each heating element 7 through the leads 15. Copper bar 16 is fixed on flange plate 2 through many copper bar support piece 17, is equipped with insulated column 18 between copper bar 16 and the copper bar support piece 17. The terminal block 1 is provided with a grounding post 23, one end of which is fixed to the flange plate 2 and the other end of which is connected to a flange head 20 of a flange plate 19 provided on an end face of the terminal block 1 through a wire 15. The upper end surface and the lower end surface of the junction box 1 are respectively provided with a flange plate 19 and a flange blind plate 22; a glan head 20 is provided on the glan plate 19 for connecting an external power source through a cable, and an inner end portion of the glan head 20 is connected to the thermostat 14 through a wire 15.
The heating element 7 can be a straight-through electric heating tube with a single terminal, a U-shaped electric heating tube with a double terminal, or a multi-segment folding electric heating tube with a double terminal as shown in fig. 4; at the end of the terminal there is a heater-tube-port-fitting 8 for cooperating with a heater-tube-fitting-fastener 12 for securing the terminal at the mounting-hole of the flange plate 2. The heating element 7 is also provided with a heating pipe tail joint 9 which is used for installing and positioning the insulating layer partition plate 4 and plugging the installation hole when the insulating layer partition plate 4 passes through; between the heating pipe orifice joint 8 and the heating pipe tail joint 9 of the heating element 7, there is a cold section which does not generate heat, and a mode of short-circuiting the part (heating power is zero) by connecting a heating wire in parallel with a copper wire can be adopted. The terminal of the heating element 7 is fixedly installed by heating a pipe joint fastener 12; wherein, the wiring end of the heating element 7 is provided with an external thread, and the heating pipe joint fastener 12 is provided with an internal thread matched with the external thread. After the terminals of the heating element 7 are inserted through the heater coupling gasket 13 and the mounting holes in the flange plate 2, the flange plate 2 and the heater coupling gasket 13 are pressed against the heater coupling boss 8 by the heater coupling fastener 12. High-temperature silica gel 25 is arranged between the heating pipe tail joint 9 and the heat-insulating layer partition plate 4 and used for sealing and penetrating through an installation hole of the heat-insulating layer partition plate 4.
A temperature measuring tube 11 penetrating through the heat insulation structure is arranged between the heating elements 7; the temperature measuring tube 11 is single-end closed, and the opening end is fixed on the flange plate 2; the thermocouple is installed in the temperature measuring tube, and the terminal of the thermocouple is connected to the temperature controller 14 through a lead 15.
More specifically described below:
the terminal block 1 serves to protect the electrical connections therein. The junction box gasket 21 is arranged between the cover and the box body of the junction box 1, so that the junction box 1 can meet the IP protection level requirement of a product.
The flange plate 2 is used for fixing the heating element 7 and the bracket 5, mounting holes are arranged at intervals around the flange plate, and the air duct heater can be fixed in an air duct of a user side by utilizing a bolt assembly.
The heat-insulating cover 3 and the heat-insulating layer partition plate 4 are used for enclosing the heat-insulating cotton 10 with the flange plate 2; the insulating layer partition plate 4 is provided with a mounting hole, so that the heating element 7 can pass through the mounting hole and form sealing with the tail joint 8 of the heating pipe.
The support 5 is intended to form a frame structure with the flange plate 2, supporting the fixed support partitions 6 to protect the heating elements 7 from compression.
The support partition 6 is used for supporting and assisting in fixing the heating element 7, and the mounting hole of the support partition can pass through the heating element 7.
The heating element 7 is used for generating heat by energization. The heating element 7 can be a straight-through electric heating tube with a single wiring end, a U-shaped electric heating tube with double wiring ends or a multi-section folding electric heating tube with double wiring ends; the specific product structure can refer to the prior art. For example, a heating wire for generating heat by energization is provided inside the tubular case, and magnesium oxide powder is filled for insulation.
The heater tube port fitting 8 is adapted to cooperate with the heater tube fitting fastener 12 to secure the heating element 7 to the flange plate 2.
The heating pipe tail joint 9 is used for installing and positioning the heat-insulating layer partition plate 4 and plugging an installation hole with the high-temperature silica gel 25, so that the heat-insulating cotton 10 is prevented from contacting with a working medium outside the heat-insulating layer partition plate 4.
The insulating cotton 10 is used for preventing the heat generated by the heating element 7 from being conducted into the junction box 1.
The temperature measuring tube 11 is used for installing and fixing a thermocouple, so that the thermocouple is prevented from contacting with a working medium of an external environment, and replacement is convenient.
The heater tube coupling fastener 12 is adapted to cooperate with the heater tube orifice coupling 8 to secure the heating element 7 to the flange plate 2.
The heater pipe joint gasket 13 is placed between the flange plate 2 and the heater pipe orifice joint 8 to achieve sealing.
The temperature controller 14 is used for detecting the temperature in the air duct and controlling the operation power of each heating element 7, and finally the stable control of the integral heating power of the air duct heater is realized.
The lead 15 is used for connecting the heating element 7 and the copper bar 16, the copper bar 16 and the temperature controller 14, the thermocouple and the temperature controller 14, the temperature controller 14 and the Glan head 20.
The copper bar 16 is used for the temperature controller 14 and the heating element 7 to realize the safe input of the power supply.
The brass plate support 17 is used to support the copper bar 16.
The insulating column 18 is used for insulating the copper bar 16 from the brass plate support 17.
The gland plate 19 is used for fixing the gland head 20
The glan head 20(Cable gland) is also called a Cable waterproof joint and a Cable fixed head (Cable fixed head), and is widely applied to fixing and protecting wires and cables of mechanical equipment, electrical equipment of ships and corrosion-resistant equipment.
The flange plate 22 is interchangeable with the terminal box flange plate 19, so that the up and down wiring modes can be interchanged.
The grounding post 23 is used to achieve grounding through the glan head 20.
The temperature control bracket 24 is used for installing and fixing the temperature controller 14.
The high-temperature silica gel 25 is used for sealing a mounting gap between the heating pipe tail joint 9 and the mounting hole of the support partition plate 6 to realize sealing.
The lifting lugs 26 comprise a fixed lifting lug on the flange plate 2 and a removable lifting lug on the bracket 5 for lifting the duct heater.
The application method of the product of the utility model comprises the following steps:
1. the air duct heater is vertically installed in the air duct of the user end through the flange plate 2. An external power supply is connected to the glan head 20 by a cable for inputting power, and the thermostat 14 is connected to the heating element 7 by a lead 15 and a copper bar 16 to electrify the heating element to generate heat. And a gas working medium is introduced into the air duct of the user side, and heat exchange is realized through flowing gas.
2. If some of the heating elements 7 are damaged and need to be replaced, the duct heater is taken out of the duct after being shut down.
Opening the junction box 1, and taking down the copper bar 16; the heating tube joint fastener 12 is unscrewed and the heating element 7 to be replaced is withdrawn from behind the insulation structure. A new heating element 7 or modular heating assembly is then removed and a heating tube coupling spacer 13 is placed over its heating tube coupling 8 and inserted through the mounting hole in the support frame spacer 6. A temporary sleeve is then inserted through the mounting hole of the flange plate 2 from one side of the terminal block 1, and the heating element 7 or modular heating assembly is guided through the insulation structure until the terminals exit the mounting hole of the flange plate 2. Finally, the heating pipe joint fastener 12 is screwed down, the copper bar 16 is installed back, and the junction box 1 is closed.
Claims (10)
1. An air duct heater comprises a flange plate, a bracket clapboard and a plurality of tubular heating elements; the two supports are respectively arranged at the two end parts at the same side of the flange plate; at least one bracket clapboard is arranged in the vertical direction between the two brackets, and the wiring terminal of the heating element passes through the bracket clapboard and the flange plate and is fixed on the flange plate by the pipe orifice part; it is characterized in that the preparation method is characterized in that,
this wind channel heater still includes:
the heat insulation structure comprises a heat insulation layer clapboard parallel to the bracket clapboard, heat insulation cotton filled between the flange plate and the heat insulation layer clapboard, and a heat insulation cover surrounding the flange plate and the outer edge of the heat insulation layer clapboard; the terminal of the heating element penetrates through the heat insulation structure and then is fixed on the flange plate;
the junction box is arranged on the outer side of the flange plate relative to the heat insulation structure, and a temperature controller and a copper bar are arranged in the junction box; the temperature controller is respectively connected with the copper bar and the thermocouple through leads, and the copper bar is connected with the wiring ends of the heating elements through leads.
2. The duct heater according to claim 1, wherein the heating element is a straight-through electric heating tube having a single terminal, a U-shaped electric heating tube having a double terminal, or a multi-segment fold-back electric heating tube having a double terminal; the tail end of the wiring end of the heating pipe is provided with a heating pipe orifice joint which is used for being matched with a fastener to fix the wiring end at the mounting hole of the flange plate; the heating element is also provided with a heating pipe tail joint for installing and positioning the insulating layer partition plate and plugging the installation hole; between the heating pipe orifice joint and the heating pipe tail joint of the heating element, a cold section which does not generate heat is arranged.
3. The air duct heater according to claim 2, wherein the terminal ends of the heating element pass through mounting holes in the heater coupling gasket and the flange plate and are pressed against the heater coupling nipple by the heater coupling fastener.
4. The air duct heater according to claim 2, wherein a high temperature silica gel is disposed between the heating tube end fitting and the insulating layer partition for sealing the installation aperture.
5. The air duct heater according to claim 1, further comprising a temperature tube passing through the insulating structure; the single end of the temperature measuring pipe is closed, the opening end of the temperature measuring pipe is fixed on the flange plate, the thermocouple is installed in the temperature measuring pipe, and the wiring end of the thermocouple is connected to the temperature controller through a wire.
6. The air duct heater according to claim 1, wherein the copper bar is fixed on the flange plate by a plurality of copper bar supporting members, and an insulating column is provided between the copper bar and the copper bar supporting members.
7. The air duct heater according to claim 1, wherein the upper and lower end faces of the junction box are respectively provided with a flange plate and a flange blank plate; the glan plate is provided with a glan head for connecting an external power supply through a cable, and the inner end part of the glan head is connected to the temperature controller through a lead.
8. The air duct heater according to claim 1, wherein the terminal box is provided therein with a grounding post, one end of which is fixed to the flange plate and the other end of which is connected to a flange head provided on a flange plate of an end face of the terminal box by a wire.
9. The duct heater according to claim 1, wherein the terminal end of the heating element is fixedly mounted by a heater-nipple fastener; wherein, the wiring end of heating element is equipped with the external screw thread, and heating tube connects the fastener and is equipped with the internal thread that matches with it.
10. The air duct heater of claim 1, wherein a plurality of lifting lugs are provided on the upper side of the bracket and flange plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122030172.1U CN216011274U (en) | 2021-08-26 | 2021-08-26 | Air duct heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122030172.1U CN216011274U (en) | 2021-08-26 | 2021-08-26 | Air duct heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216011274U true CN216011274U (en) | 2022-03-11 |
Family
ID=80533712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122030172.1U Active CN216011274U (en) | 2021-08-26 | 2021-08-26 | Air duct heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216011274U (en) |
-
2021
- 2021-08-26 CN CN202122030172.1U patent/CN216011274U/en active Active
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