Electric heater based on special-shaped electric heating tube

Abstract

The utility model discloses an electric heater based on special-shaped electric heating tubes, which comprises an electric heater shell, a fluid inlet is arranged at the upper end of the electric heater shell, a fluid outlet is arranged at the lower end of the electric heater shell, and a fluid distributor is arranged at a position corresponding to the fluid inlet in the electric heater shell. The special-shaped electric heating tube group is arranged between the fluid inlet and the fluid outlet in the electric heater shell, the special-shaped electric heating tube group is composed of a plurality of special-shaped electric heating tubes with the cross sections of inverted water drop structures, and the special-shaped electric heating tube group is arranged in the electric heater shell and corresponds to the fluid inlet and the fluid outlet. The lower wake flow area of the special-shaped electric heating tube with the inverted water drop-shaped structure is reduced, so that the temperature dead zone is reduced, the fluid to be heated is heated more uniformly, the problem of the high-temperature dead zone at the bottom of the electric heating tube is effectively solved, the heating uniformity of the electric heater is improved, and the service life of the electric heating tube is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of electric heater technology, specifically relating to an electric heater based on an irregularly shaped electric heating tube. Background Technology

[0002] Currently, electric heaters are developing rapidly with people's pursuit of quality of life and the promotion of dual-carbon policies. They are developing towards greater efficiency, energy conservation, emission reduction and resource recycling, thereby reducing their impact on the environment. With the continuous expansion of the application scope, electric heating needs to adapt to the heating needs of different occasions. In the field of industrial fluid heating, resistance heaters have developed rapidly in recent years, which require the fluid to be heated to the specified temperature with high precision and speed.

[0003] However, during fluid heating, the temperature uniformity of electric heaters is often difficult to guarantee. When the fluid flows laterally through the electric heating tube, one side of the electric heating tube faces the fluid, while the other side will be affected by the wake, resulting in excessively high local temperatures. Excessively high local temperatures will change the properties of the medium and shorten the life of the electric heating tube. To address this, we propose an electric heater based on an irregularly shaped electric heating tube. Utility Model Content

[0004] The purpose of this invention is to provide an electric heater based on an irregularly shaped electric heating tube to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric heater based on an irregularly shaped electric heating tube, comprising,

[0006] An electric heater housing, wherein a fluid inlet is provided at the upper end of the electric heater housing and a fluid outlet is provided at the lower end of the electric heater housing;

[0007] A fluid distributor is disposed inside the electric heater housing at a position corresponding to the fluid inlet;

[0008] An irregularly shaped electric heating tube assembly is disposed within the electric heater housing between the fluid inlet and the fluid outlet.

[0009] Preferably, the fluid inlet and the fluid outlet are symmetrically arranged at the upper and lower ends of the electric heater housing.

[0010] Preferably, the fluid distributor is positioned above the irregularly shaped electric heating tube assembly.

[0011] Preferably, the irregularly shaped electric heating tube assembly is disposed within the electric heater housing via a tube sheet.

[0012] Preferably, the irregularly shaped electric heating tube assembly includes a plurality of irregularly shaped electric heating tubes, which are arranged at equal intervals on the tube sheet.

[0013] Preferably, the cross-section of the irregularly shaped electric heating tube is an inverted teardrop shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention includes a fluid distributor and an irregularly shaped electric heating tube assembly. The irregularly shaped electric heating tube assembly consists of several irregularly shaped electric heating tubes with inverted teardrop-shaped cross-sections. In use, the fluid to be heated enters the fluid distributor through the fluid inlet. The fluid distributor evenly distributes the fluid to be heated into the interior of the electric heater shell, and then conducts convective heat exchange with the several irregularly shaped electric heating tubes with inverted teardrop-shaped cross-sections. When the fluid to be heated flows to the lower part of the irregularly shaped electric heating tubes, the lower wake region of the inverted teardrop-shaped electric heating tubes is reduced, thereby reducing the temperature dead zone and making the fluid to be heated more uniformly heated. Then, the fluid after heat exchange flows out from the fluid outlet, effectively solving the problem of high-temperature dead zone at the bottom of the electric heating tube, improving the heating uniformity of the electric heater, and extending the service life of the electric heating tubes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0017] Figure 2 This is a side sectional view of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the irregularly shaped electric heating tube of this utility model;

[0019] Figure 4 This is a temperature simulation diagram of fluid flow passing through the irregularly shaped electric heating tube according to this utility model.

[0020] Figure 5 This is a temperature simulation diagram of a traditional fluid flow passing through a circular electric heating tube.

[0021] In the figure: 1. Electric heater housing; 2. Fluid inlet; 3. Fluid outlet; 4. Fluid distributor; 5. Irregularly shaped electric heating tube assembly; 501. Irregularly shaped electric heating tube; 6. Tube sheet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 The electric heater based on an irregularly shaped electric heating tube provided by this utility model includes,

[0024] The electric heater housing 1 has a fluid inlet 2 at its upper end and a fluid outlet 3 at its lower end. The fluid inlet 2 and the fluid outlet 3 are symmetrically arranged at the upper and lower ends of the electric heater housing 1.

[0025] Fluid distributor 4 is located inside the electric heater housing 1 at the position corresponding to the fluid inlet 2, and is positioned above the irregularly shaped electric heating tube assembly 5.

[0026] The irregularly shaped electric heating tube assembly 5 is disposed inside the electric heater housing 1 between the fluid inlet 2 and the fluid outlet 3. The irregularly shaped electric heating tube assembly 5 is disposed inside the electric heater housing 1 through the tube sheet 6. The irregularly shaped electric heating tube assembly 5 includes several irregularly shaped electric heating tubes 501, which are equally spaced on the tube sheet 6. The cross-section of the irregularly shaped electric heating tube 501 is an inverted teardrop shape.

[0027] This invention includes a fluid distributor 4 and a group of irregularly shaped electric heating tubes 5. The group of irregularly shaped electric heating tubes 5 consists of several irregularly shaped electric heating tubes 501 with inverted teardrop-shaped cross-sections. In use, the fluid to be heated enters the fluid distributor 4 through the fluid inlet 2. The fluid distributor 4 distributes the fluid to be heated evenly into the interior of the electric heater housing 1, and then conducts convective heat exchange with the irregularly shaped electric heating tubes 501 with inverted teardrop-shaped cross-sections. When the fluid to be heated flows to the lower part of the irregularly shaped electric heating tubes 501, the lower tail area of ​​the inverted teardrop-shaped irregularly shaped electric heating tubes 501 is reduced, thereby reducing the temperature dead zone and making the heating of the fluid to be heated more uniform. Then, the heat-exchanged fluid flows out from the fluid outlet 3, effectively solving the problem of the high-temperature dead zone at the bottom of the electric heating tube, improving the heating uniformity of the electric heater, and extending the service life of the electric heating tube.

[0028] like Figure 4 and Figure 5 As shown, Figure 4 This is a temperature simulation diagram of the fluid flow passing through the irregularly shaped electric heating tube according to this invention. Figure 5 The temperature simulation diagram of a traditional fluid flow passing through a circular electric heating tube;

[0029] Depend on Figure 4 and Figure 5 It can be seen that the eddy current dead zone area of ​​the irregularly shaped electric heating tube of this utility model is significantly smaller than that of the traditional circular electric heating tube, which greatly reduces the fluid flow resistance, effectively improves the problem of high temperature dead zone when the fluid flows through the electric heating tube, and makes the heating more uniform.

[0030] In summary, the method of using the electric heater based on the irregularly shaped electric heating tubes provided in this embodiment is as follows: In use, the fluid to be heated enters the fluid distributor 4 from the fluid inlet 2. The fluid distributor 4 distributes the fluid to be heated evenly into the interior of the electric heater housing 1, and then conducts convective heat exchange with several irregularly shaped electric heating tubes 501 with inverted teardrop-shaped cross-sections. When the fluid to be heated flows to the lower part of the irregularly shaped electric heating tubes 501, the lower tail region of the inverted teardrop-shaped irregularly shaped electric heating tubes 501 is reduced, thereby reducing the temperature dead zone and making the heating of the fluid to be heated more uniform. Then, the heat-exchanged fluid flows out from the fluid outlet 3.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric heater based on an irregularly shaped electric heating tube, characterized in that, include, Electric heater housing (1), the upper end of the electric heater housing (1) is provided with a fluid inlet (2), and the lower end of the electric heater housing (1) is provided with a fluid outlet (3). A fluid distributor (4) is disposed inside the electric heater housing (1) at a position corresponding to the fluid inlet (2); A shaped electric heating tube assembly (5) is disposed inside the electric heater housing (1) between the fluid inlet (2) and the fluid outlet (3); The irregularly shaped electric heating tube assembly (5) is disposed inside the electric heater housing (1) via a tube sheet (6); The irregularly shaped electric heating tube group (5) includes several irregularly shaped electric heating tubes (501), and the several irregularly shaped electric heating tubes (501) are arranged at equal intervals on the tube sheet (6); The cross-section of the irregularly shaped electric heating tube (501) is an inverted teardrop shape.

2. An electric heater based on an irregularly shaped electric heating tube according to claim 1, characterized in that: The fluid inlet (2) and the fluid outlet (3) are symmetrically arranged at the upper and lower ends of the electric heater housing (1).

3. An electric heater based on an irregularly shaped electric heating tube according to claim 1, characterized in that: The fluid distributor (4) is positioned above the irregularly shaped electric heating tube assembly (5).

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