A high-efficiency heat exchange tube heater

Abstract

This utility model discloses a high-efficiency heat exchange tube heater, relating to the field of heating equipment technology. It includes an inner tube and an outer tube arranged coaxially, forming an annular water flow channel between them. The outer wall of the outer tube has a spiral positioning groove, into which the heating wire is embedded, increasing the contact area and improving the heat transfer rate per unit area. First and second retainers are fixed at both ends. The inlet of the first retainer has a built-in spiral blade to guide the water flow to conform to the heating surface of the outer tube; downstream of the first retainer is an inclined guide surface with a conical curved surface, the radius of curvature increasing with the water flow direction, causing agitation of the water flow, enhancing the heat exchange effect, and improving heating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment technology, specifically to a high-efficiency heat exchange tube heater. Background Technology

[0002] In the field of heating equipment technology, tubular heaters are widely used. Traditional tubular heaters typically involve directly winding heating wires around the outside of the tube; however, this method has several drawbacks. Because the heating wires are directly wound around the outer wall of the tube, the heating area is limited, resulting in a low heat melting rate per unit area and low heating efficiency. Simultaneously, the water flow inside the tube is relatively slow, leading to insufficient contact with the heating surface, further affecting the heating effect and making it difficult to meet the requirements for high-efficiency heating. Utility Model Content

[0003] In view of the above, the purpose of this utility model is to provide a high-efficiency heat exchange tube heater to address the problems of the prior art.

[0004] This solution includes a high-efficiency heat exchange tube heater, comprising an inner tube and an outer tube arranged coaxially, forming an annular water flow channel between the inner and outer tubes for water flow. A heating wire is wound around the outer wall of the outer tube, and an axially extending spiral positioning groove is provided on the outer wall of the outer tube, within which the heating wire is embedded.

[0005] The heater also includes a first retainer and a second retainer located at both ends of the inner and outer tubes, which are used to fix the inner and outer tubes. The first retainer has a water inlet with a built-in helical blade.

[0006] In addition, the first retainer is provided with an inclined guide surface, which is located downstream of the helical blade, and the inclined guide surface is a conical curved surface with its radius of curvature gradually increasing with the direction of water flow.

[0007] Beneficial effects: 1. The spiral positioning groove on the outer wall of the outer tube not only provides a good fixation for the heating wire, but also increases the contact area between the heating wire and the outer tube, thereby improving the heat melting rate per unit area and enhancing the heating effect.

[0008] 2. The annular water flow channel formed by the inner and outer tubes allows the heating wire wound around the outer tube to heat the water flow more effectively, thus improving heating efficiency.

[0009] 3. The spiral blades inside the inlet of the first retainer can guide the water flow to fit more closely to the heating surface of the outer tube, which helps to improve the heat exchange efficiency.

[0010] 4. The inclined guide surface located downstream of the spiral blade is a conical curved surface with a radius of curvature that gradually increases with the direction of water flow. This can cause the water flow to be agitated, forming a secondary spiral agitation effect, which accelerates the heat exchange rate and further improves the heating efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present application; Figure 2 This is a cross-sectional schematic diagram of this application; Figure 3 This is a schematic diagram of the assembly of the first retainer in this application; Figure 4 This is a schematic diagram of the assembly of the second retainer in this application; Figure 5 , Figure 6 These are three-dimensional structural diagrams of the first retainer of this application from different perspectives. Reference numerals: Inner tube 1, outer tube 2, spiral positioning groove 201, first retainer 3, spiral blade 301, inclined guide surface 302, second retainer 4. Detailed Implementation

[0012] 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.

[0013] Reference Figures 1 to 5 The high-efficiency heat exchange tube heater shown includes an inner tube 1 and an outer tube 2, which are coaxially arranged and fixed by a first retainer 3 and a second retainer 4 at both ends to ensure that a stable annular water flow channel is formed between the inner tube 1 and the outer tube 2.

[0014] The spiral positioning groove 201 on the outer wall of the outer tube 2 extends axially. The spiral spacing and depth are determined according to the diameter of the heating wire. Usually, the spiral spacing is 1.2-1.5 times the diameter of the heating wire, and the depth is slightly greater than the diameter of the heating wire to ensure that the heating wire can be stably embedded in the groove.

[0015] The inlet of the first retainer 3 is equipped with a spiral blade 301, which creates a spiral flow when water enters, better conforming to the heating surface of the outer tube 2. Downstream of the spiral blade 301 is an inclined guide surface 302, which is a conical curved surface with its radius of curvature gradually increasing from the end near the spiral blade 301 to the end away from the spiral blade 301. This design allows the water flow to be effectively agitated when passing through the inclined guide surface 302, enhancing the heat exchange effect.

[0016] It should be noted that although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 the present invention is defined by the appended claims and their equivalents.

Claims

1. A high efficiency heat exchanging tube heater characterized by, The application relates to a water heating device, which comprises an inner tube (1) and an outer tube (2) coaxially arranged, a ring-shaped water flow channel is formed between the inner tube (1) and the outer tube (2), a heating wire is wound on the outer wall of the outer tube (2), the outer wall of the outer tube (2) is provided with an axially extending spiral positioning groove (201), and the heating wire is embedded in the spiral positioning groove (201).

2. A high efficiency heat exchanging tube heater as claimed in claim 1, wherein, The application further relates to a water heating device, which comprises first retainers (3) and second retainers (4) arranged at the two ends of the inner tube (1) and the outer tube (2), the first retainers (3) are provided with water inlets, and the water inlets are internally provided with spiral blades (301).

3. A high efficiency heat exchanging tube heater as claimed in claim 2, wherein, The first retainers (3) are provided with inclined flow guide surfaces (302), and the inclined flow guide surfaces (302) are located downstream of the spiral blades (301).

4. A high efficiency heat exchanging tube heater as claimed in claim 3, wherein, The inclined flow guide surfaces (302) are conical curved surfaces, and the curvature radius gradually increases along the water flow direction.

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