An electric heater with high heat exchange efficiency

Abstract

The utility model provides an electric heater with high heat exchange efficiency, comprising an electric heater body and a scale inhibition mechanism, wherein the electric heater body comprises an electric heating tube and mounting brackets installed at both ends of the electric heating tube, the scale inhibition mechanism is provided with at least one group, the scale inhibition mechanism comprises a fixing plate and a heat expansion wire, the fixing plates are fixedly installed at both ends of the heat expansion wire, the fixing plates are fixedly installed on the electric heater body, and the heat expansion wire is wound on the electric heating tube; the scale inhibition mechanism is independently arranged, and can be spliced ​​and assembled according to the length of the electric heating tube in actual use, so as to meet the installation requirements of electric heating tubes of different lengths, and the detachable scale inhibition mechanism is conducive to its replacement or maintenance.

Description

Technical Field

[0001] The utility model relates to the field of electric heating tubes, in particular to an electric heater with high heat exchange efficiency. Background Art

[0002] Existing electric heaters are generally composed of a metal tube, a resistance wire arranged in the metal tube, and crystalline magnesium oxide powder with good thermal conductivity and good insulation, and are suitable for heating air, oil, water, chemical media, hot pressing molds, molten salts, alkalis, and low-melting-point alloys;

[0003] When the electric heater heats water, the calcium, magnesium, salt and other components in the water will decompose due to the heat, and the substances originally soluble in water will be converted into substances that are insoluble in water. After a long period of heating, these substances that are insoluble in water will adhere to the surface of the electric heating tube and gradually form scale. The scale has a great impact on the heating efficiency of the electric heater;

[0004] The Chinese invention patent with announcement number CN107889293B discloses a novel scale-inhibiting electric heating tube and water heater. The invention achieves the purpose of double scale inhibition by using a temperature-sensitive expansion wire to deform when heated. During the deformation of the temperature-sensitive expansion wire, the thread will be displaced, and scratches will be formed on the surface of the electric heating tube, thereby improving the heat exchange efficiency. However, in the invention, the temperature-sensitive expansion wire is fixed on the electric heating tube, making it difficult to replace. In addition, during the production process of the electric heating tube, the length of the electric heating tube needs to be determined before the temperature-sensitive expansion wire can be installed and produced in a targeted manner. This is not flexible enough during the production process, which affects production efficiency. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above problems in the prior art, the utility model provides an electric heater with high heat exchange efficiency.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] An electric heater with high heat exchange efficiency, comprising an electric heater body and a scale inhibition mechanism;

[0010] The electric heater body comprises an electric heating tube and mounting bases mounted at both ends of the electric heating tube;

[0011] At least one scale inhibition mechanism is provided, and the scale inhibition mechanism includes a fixing plate and a heat expansion wire. The fixing plates are fixedly installed at both ends of the heat expansion wire, and the fixing plates are fixedly installed on the electric heater body. The heat expansion wire is wound on the electric heating tube.

[0012] Preferably, the fixing plate is a U-shaped plate structure, and a strip hole is opened on the fixing plate. When two groups of the scale inhibition mechanisms are installed on the electric heating tube, the two groups of the scale inhibition mechanisms are close to each other and the fixing plates on one end are tightly attached to each other, and the openings of the fixing plates of the two groups of the scale inhibition mechanisms are set in opposite directions and are fixedly connected by a bolt assembly.

[0013] Preferably, the heat-expandable metal wire is an aluminum expansion wire.

[0014] Preferably, the electric heating tube is an L-shaped electric heating tube, a U-shaped electric heating tube, a W-shaped electric heating tube or a special-shaped electric heating tube.

[0015] (III) Beneficial effects

[0016] The beneficial effects of the utility model are that the scale inhibition mechanism is independently arranged and can be spliced ​​and assembled according to the length of the electric heating tube in actual use, so as to meet the installation requirements of electric heating tubes of different lengths, and the detachable scale inhibition mechanism is conducive to its replacement or maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an electric heater with high heat exchange efficiency;

[0018] Figure 2 It is a structural schematic diagram of the scale suppression mechanism;

[0019] Figure 3 This is a schematic structural diagram of the second embodiment of the utility model;

[0020] Figure 4 The structure diagram of two fixed plates docking Figure 1 ;

[0021] Figure 5 The structure diagram of two fixed plates docking Figure 2 .

[0022] Description of reference numerals:

[0023] 1. Electric heater body;

[0024] 11. Electric heating tube; 12. Install the card holder;

[0025] 2. Anti-scaling mechanism;

[0026] 21. thermal expansion wire; 22. fixing plate; 23. strip hole;

[0027] 3. Bolt assembly. DETAILED DESCRIPTION

[0028] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0029] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , the first embodiment of the utility model:

[0030] An electric heater with high heat exchange efficiency, comprising an electric heater body 1 and a scale suppression mechanism 2; the electric heater body 1 comprises an electric heating tube 11 and mounting bases 12 mounted at both ends of the electric heating tube 11;

[0031] The scale suppression mechanism 2 is provided with at least one group, and the scale suppression mechanism 2 includes a fixing plate 22 and a heat expansion wire 21, the fixing plates 22 are fixedly installed at both ends of the heat expansion wire 21, the fixing plate 22 is fixedly installed on the electric heater body 1, and the heat expansion wire 21 is wound on the electric heating tube 11;

[0032] When in use, one of the fixed plates 22 in the scale inhibition mechanism 2 is connected to the mounting base 12, and then the heat expansion wire 21 is wound around the electric heating tube 11. If the length of the scale inhibition mechanism 2 is sufficient to cover the electric heating tube 11, the other fixed plate 22 is directly installed on the corresponding mounting base 12. If the length of the scale inhibition mechanism 2 is not sufficient to cover the electric heating tube 11, the fixed plates 22 of the two groups of scale inhibition mechanisms 2 are connected so that they can be used for the installation of electric heating tubes 11 of different lengths. The fixed plates 22 are detachable, which is convenient for replacing or repairing the scale inhibition mechanism 2.

[0033] The heat-expandable metal wire 21 covering the electric heating tube 11 will deform with the temperature. The thermal expansion wire will expand when heated and contract when cooled, causing scale to fall off. During the deformation of the thermal expansion wire, scratches will be formed on the surface of the electric heating tube 11, thereby achieving the purpose of descaling and further improving the heating efficiency of the electric heater.

[0034] In this embodiment, the fixing plate 22 is a U-shaped plate structure, and a strip hole 23 is opened on the fixing plate 22. When the two groups of the scale inhibition mechanisms 2 are installed on the electric heating tube 11, the two groups of the scale inhibition mechanisms 2 are close to each other and the fixing plates 22 on one end are tightly attached to each other, and the openings of the fixing plates 22 of the two groups of the scale inhibition mechanisms 2 are set in opposite directions and fixedly connected by the bolt assembly 3; the openings of the two fixing plates 22 are set in opposite directions, and can be firmly fixed on the electric heating tube 11 under the connection and fixation of the bolt assembly 3.

[0035] In this embodiment, the heat-expandable metal wire 21 is an aluminum expansion wire.

[0036] In this embodiment, the electric heating tube 11 is an L-shaped electric heating tube 11 , a U-shaped electric heating tube 11 , a W-shaped electric heating tube 11 or a special-shaped electric heating tube 11 .

[0037] refer to Figure 3 , the second embodiment of the utility model:

[0038] When the electric heating tube 11 is a U-shaped tube, one group of anti-scaling mechanisms 2 is installed in the arc-shaped pipe part of the electric heating tube 11, and then two groups of anti-scaling mechanisms 2 are installed in the horizontal pipe part of the electric heating tube 11, and the fixing plates 22 of adjacent anti-scaling mechanisms 2 are fixedly connected by bolt assemblies 3.

[0039] The working principle of the utility model is as follows:

[0040] Connect one of the fixed plates 22 in the scale prevention mechanism 2 to the mounting base 12, and then wind the heat expansion wire 21 around the electric heating tube 11. If the length of the scale prevention mechanism 2 is sufficient to cover the electric heating tube 11, directly mount the other fixed plate 22 on the corresponding mounting base 12. If the length of the scale prevention mechanism 2 is not sufficient to cover the electric heating tube 11, dock the fixed plates 22 of the two groups of scale prevention mechanisms 2 so that they can be used for the installation of electric heating tubes 11 of different lengths. The fixed plates 22 are detachable, which is convenient for replacing or repairing the scale prevention mechanism 2.

[0041] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0042] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric heater with high heat exchange efficiency, characterized in that: It includes an electric heater body and a scale suppression mechanism; The electric heater body comprises an electric heating tube and mounting bases mounted at both ends of the electric heating tube; At least one scale-inhibiting mechanism is provided, and the scale-inhibiting mechanism comprises a fixing plate and a heat-expandable metal wire, the fixing plates are fixedly mounted at both ends of the heat-expandable metal wire, the fixing plates are fixedly mounted on the electric heater body, and the heat-expandable metal wire is wound on the electric heating tube; The fixing plate is a U-shaped plate structure, and a strip hole is opened on the fixing plate. When two groups of the anti-scaling mechanisms are installed on the electric heating tube, the two groups of the anti-scaling mechanisms are close to each other and the fixing plates on one end are tightly attached to each other, and the openings of the fixing plates of the two groups of the anti-scaling mechanisms are set in opposite directions and are fixedly connected by a bolt assembly.

2. The electric heater with high heat exchange efficiency according to claim 1, characterized in that: The thermal expansion wire is an aluminum expansion wire.

3. The electric heater with high heat exchange efficiency according to claim 1, characterized in that: The electric heating tube is an L-shaped electric heating tube, a U-shaped electric heating tube, a W-shaped electric heating tube or a special-shaped electric heating tube.

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