CN218565774U - Electric heater - Google Patents
Electric heater Download PDFInfo
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- CN218565774U CN218565774U CN202222429096.6U CN202222429096U CN218565774U CN 218565774 U CN218565774 U CN 218565774U CN 202222429096 U CN202222429096 U CN 202222429096U CN 218565774 U CN218565774 U CN 218565774U
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- electric heater
- baffle plate
- baffle
- holes
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Abstract
The utility model discloses an electric heater, including electric heater main part, electric heating pipe, baffling board and pull rod, be provided with interval distribution's medium import department and medium exit in the electric heater main part, the side of baffling board runs through has a plurality of first holes, and the edge in first hole has run through a plurality of second holes along the week length direction, and the inside of electric heater main part still is provided with the baffle. The utility model adopts the baffle plate with the quincuncial holes for flow guiding, can eliminate dead zones and improve heat exchange efficiency, and in addition, an inclined baffle plate is added at the outlet of the electric heater to prevent unsmooth airflow caused by reverse flow from generating high temperature, thereby effectively reducing partial pressure drop loss caused by reverse flow; and the electric heater reduces the pressure drop and the surface temperature of the electric heating pipe caused by dead zones under the condition of not increasing the inner diameter of the container, does not need to improve the material grade of the electric heating pipe due to long-time high temperature, saves the cost and improves the market competitiveness.
Description
Technical Field
The utility model relates to an electric heater.
Background
Conventional electric heaters typically employ an arcuate baffle or support mesh within the heater. By adopting the heater with the arch-shaped baffle plate, dead zones are generated on the back surface of the arch-shaped baffle plate, and the surface temperature of a heating pipe can be continuously increased and damaged after long-time use. The heater adopting the supporting net has the advantages that the gas flow direction is a straight line, the flow is short, the medium cannot reach the temperature required by the working condition due to insufficient heat exchange, if the temperature required by the working condition is reached, the temperature on the surface of the electric heating pipe needs to be raised to a higher temperature, the service life of the electric heater is not long in the past for a long time, and if the service life of the electric heater is prolonged, the material grade (shell, insulating filler and heating wire) of the electric heating pipe needs to be improved, so the cost is inevitably increased.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing an electric heater to improve electric heater's heat exchange efficiency, eliminate the blind spot, further reduced pressure drop.
The purpose of the utility model can be achieved by adopting the following technical scheme:
an electric heater comprises an electric heater body, an electric heating pipe and a baffle plate, wherein a medium inlet and a medium outlet are formed in the electric heater body, the medium inlet and the medium outlet are distributed at intervals, a plurality of first holes penetrate through the side face of the baffle plate, a plurality of second holes penetrate through the edge of the first holes along the circumferential direction, a baffle is further arranged inside the electric heater body, and the baffle is obliquely arranged below the medium outlet.
Preferably, the medium inlet and the medium outlet are distributed at intervals left and right.
Preferably, the lower region of the medium outlet is divided into a first part and a second part which are adjacently distributed at the left and the right, wherein the second part is close to the tail part of the electric heater main body, and the baffle is obliquely arranged in the second part.
Preferably, the first aperture and the plurality of second apertures at the edge thereof constitute a quincunx hole.
Preferably, the electric heating pipe is inserted into a part of the first aperture on the baffle plate.
Preferably, the aperture of the second aperture is smaller than the aperture of the first aperture.
The utility model has the advantages of: the utility model adopts the baffle plate with the quincuncial holes (composed of the first and the second holes which are distributed adjacently) for flow guiding, can eliminate dead zones and improve the heat exchange efficiency, and in addition, the inclined baffle plate is added at the outlet of the electric heater to prevent unsmooth airflow caused by reverse flow from generating high temperature, thereby effectively reducing partial pressure drop loss caused by reverse flow; and the electric heater reduces the pressure drop and the surface temperature of the electric heating pipe caused by dead zones under the condition of not increasing the inner diameter of the container, does not need to improve the material grade of the electric heating pipe due to long-time high temperature caused by the dead zones, saves the cost and improves the market competitiveness.
Drawings
Fig. 1 is a schematic cross-sectional view of an electric heater according to an embodiment of the present invention;
fig. 2 is a schematic side view of a baffle according to an embodiment of the invention.
In the figure: 1-electric heater body, 2-electric heating tube, 3-baffle plate, 4-pull rod, 5-baffle plate, 6-medium inlet, 7-medium outlet and 8-plum blossom hole.
Detailed Description
In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-2, the electric heater provided in this embodiment includes an electric heater body 1 (container), an electric heating tube 2, a baffle plate 3, a pull rod 4, and a tube plate, where the electric heater body 1 is provided with a medium inlet 6 and a medium outlet 7 that are distributed at intervals at left and right, a plurality of first holes penetrate through a side surface of the baffle plate 3, four second holes (as shown in fig. 2) penetrate through edges of the first holes along a circumferential direction, apertures of the second holes are smaller than an aperture of the first holes, the first holes and the second holes at the edges of the first holes form a quincunx hole 8, and the electric heating tube 2 is inserted into a part of the first holes on the baffle plate 3, so as to support the electric heating tube 2;
the electric heater comprises an electric heater body 1, and is characterized in that a baffle 5 is also arranged in the electric heater body 1, no hole is formed in the baffle 5, the baffle 5 is obliquely arranged below a medium outlet 7, and the top end of the baffle 5 is positioned right below the right inner side wall of the medium outlet 7;
when the medium in the electric heater main body 1 has a high flow speed, the medium can rush to the tail end socket to form reverse flow, the reverse flow medium can block the flow direction of the medium which normally flows out of the upper half part of the area below the medium outlet of the container to form a dead area, so that the surface of the heating pipe is high in temperature, the reverse flow of the medium also increases the pressure drop, and the medium directly flows out of the medium outlet 7 after rushing to the baffle 5 by adding the baffle 5 which is obliquely arranged, so that the reverse flow phenomenon is eliminated, and the pressure drop is reduced;
the baffle plate 3 and the baffle plate 5 are respectively fixed inside the electric heater body 1 by the pull rod 4, and the pull rod 4 is inserted into a part of the first hole at the edge of the baffle plate 3 and is used for supporting the baffle plate 3.
In this embodiment, the electric heating tube 2, the baffle plate 3 and the tube plate are assembled to form an electric heating core, the electric heating core is assembled in the electric heater body 1 to form a complete electric heater, a heated medium enters from a medium inlet, the baffle plate 3 with quincunx holes lengthens the internal flow path of the electric heater, and the medium exchanges heat with the surface of the electric heating tube, so that the required temperature is reached at an outlet.
In the present embodiment, as shown in fig. 1, the lower region of the medium outlet 7 is divided into a first portion and a second portion which are adjacently distributed left and right, wherein the second portion is close to the tail of the electric heater body 1, and the baffle 5 is obliquely arranged in the second portion, so that the medium can directly flow out from the medium outlet 7 after rushing to the baffle 5.
In the present embodiment, as shown in fig. 1, the positioning positions of the baffle plates 3 having the quincunx holes correspond to the positioning positions of the arc baffle plates in the electric heater using the arc baffle plates, and the number of the baffle plates also corresponds to one.
In summary, in the embodiment, the baffle plate with the quincunx holes is used for guiding the flow, so that dead zones can be eliminated, the heat exchange efficiency is improved, and in addition, the inclined baffle plate is additionally arranged at the outlet of the electric heater, so that the unsmooth airflow caused by backflow is prevented from generating high temperature, and the partial pressure drop loss caused by the backflow is effectively reduced; and the electric heater reduces the pressure drop and the surface temperature of the electric heating pipe caused by dead zones under the condition of not increasing the inner diameter of the container, does not need to improve the material grade of the electric heating pipe due to long-time high temperature, saves the cost and improves the market competitiveness.
The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.
Claims (6)
1. An electric heater, characterized by: the electric heating device comprises an electric heater body (1), electric heating pipes (2) and a baffle plate (3), wherein the electric heater body (1) is provided with a medium inlet (6) and a medium outlet (7) which are distributed at intervals, a plurality of first holes penetrate through the side surface of the baffle plate (3), a plurality of second holes penetrate through the edge of each first hole along the circumferential direction, and the electric heating pipes (2) are inserted into part of the first holes in the baffle plate (3).
2. The electric heater of claim 1, wherein: the medium inlet (6) and the medium outlet (7) are distributed at intervals left and right.
3. The electric heater of claim 1, wherein: the electric heater is characterized in that a baffle (5) is further arranged in the electric heater main body (1), and the baffle (5) is obliquely arranged below the medium outlet (7).
4. The electric heater of claim 1, wherein: the first aperture and a plurality of second apertures at the edge thereof constitute a quincuncial hole (8).
5. The electric heater of claim 1, wherein: the caliber of the second pore is smaller than that of the first pore.
6. An electric heater according to claim 3, wherein: the lower area of the medium outlet (7) is divided into a first part and a second part which are adjacently distributed left and right, wherein the second part is close to the tail part of the electric heater main body (1), and the baffle (5) is obliquely arranged in the second part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222429096.6U CN218565774U (en) | 2022-09-14 | 2022-09-14 | Electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222429096.6U CN218565774U (en) | 2022-09-14 | 2022-09-14 | Electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218565774U true CN218565774U (en) | 2023-03-03 |
Family
ID=85311187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222429096.6U Active CN218565774U (en) | 2022-09-14 | 2022-09-14 | Electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218565774U (en) |
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2022
- 2022-09-14 CN CN202222429096.6U patent/CN218565774U/en active Active
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