Fin type PTC (Positive Temperature Coefficient) electric heater

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) electric heaters, in particular to a fin type PTC electric heater, which comprises a heat conduction pipe, two ends of the heat conduction pipe are connected with connecting pipes, and one end of each connecting pipe is in threaded connection with a connecting seat; heat dissipation fins are arranged on the outer wall of the heat conduction pipe, and protruding blocks are installed at the top ends and the bottom ends of the heat dissipation fins; through threaded connection of the connecting pipe and the connecting seat, the connecting seat is convenient to disassemble and assemble, and through the limiting blocks on the inner wall of the mounting sleeve, the outer wall of the heat conduction pipe is conveniently sleeved with the mounting sleeve in a sliding mode along the clamping grooves, so that the heat dissipation fins are not prone to rotating on the surface of the heat conduction pipe; the problem that it is difficult to align and limit a plurality of heat dissipation fins during welding is solved, the contact area between the top ends and the bottom ends of the heat dissipation fins and air is increased conveniently through the protruding blocks installed at the top ends and the bottom ends of the heat dissipation fins, the contact area between the heat dissipation fins and the air can be further increased through the rectangular holes formed in the surfaces of the heat dissipation fins, and the heat dissipation efficiency is improved. And the heat exchange efficiency of the PTC electric heater can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC electric heaters, in particular to a fin-type PTC electric heater. Background Technique

[0002] A PTC electric heater is an electric heating device that uses a PTC material as a heating element. The PTC material has a special resistance-temperature characteristic, that is, its resistance value increases sharply with the increase of temperature. Therefore, it can realize automatic temperature control and stability. Therefore, PTC electric heaters are widely used in various occasions that require precise temperature control, and have the characteristics of precise temperature control, energy conservation, environmental protection, safety and reliability.

[0003] In the prior art, a PTC electric heater generally consists of a heat-conducting aluminum tube, a heating core in the cavity of the heat-conducting aluminum tube, and heat-dissipating fins on the outer wall of the heat-conducting aluminum tube. However, the existing heat-dissipating fins are usually in the structure of rectangular plates and are welded on the outer wall of the heat-conducting aluminum tube. It is difficult to align and limit multiple heat-dissipating fins during welding, and the contact area between the rectangular plate structure and air is limited, which is likely to affect the heat exchange efficiency of the PTC electric heater. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fin-type PTC electric heater to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A fin-type PTC electric heater, comprising: a heat-conducting tube, both ends of the heat-conducting tube are connected with connecting tubes, and one end of each of the two connecting tubes is threadedly connected with a connecting seat;

[0006] Heat-dissipating fins are arranged on the outer wall of the heat-conducting tube, bumps are installed at both the top and bottom ends of the heat-dissipating fins, and a plurality of rectangular holes are evenly formed on the surface of the heat-dissipating fins;

[0007] An installation sleeve is installed at one end of the heat-dissipating fin close to the heat-conducting tube, a limiting block is connected to the inner wall of the installation sleeve, and a clamping groove is formed on the outer wall of the heat-conducting tube close to the limiting block.

[0008] Preferably, a heating body is arranged inside the heat-conducting tube, and a heat-conducting filler is arranged between the heating body and the inner wall of the heat-conducting tube.

[0009] Preferably, one end of each of the two connecting tubes is fixedly installed at both ends of the heat-conducting tube, external threads are formed on the outer walls of the two connecting tubes, connecting grooves are formed at one end of each of the two connecting seats close to the connecting tubes, and the two connecting tubes are inserted into the connecting grooves and are threadedly connected with the connecting grooves.

[0010] Preferably, fixing plates are installed at one end of each of the two connecting seats, both fixing plates are L-shaped, and bolts are threadedly installed on the bottom surfaces of both fixing plates.

[0011] Preferably, a plurality of the heat dissipation fins are uniformly arranged, each heat dissipation fin is a rectangular plate, and a plurality of bumps are fixedly installed at the top end and the bottom end of each heat dissipation fin, and each bump is a trapezoidal tooth.

[0012] Preferably, protective bent edges are fixedly connected to the side walls on both sides of each heat dissipation fin.

[0013] Preferably, the four card slots are symmetrically arranged on the outer wall of the heat conduction tube, and four limiting blocks are fixedly installed on the inner wall of each mounting sleeve.

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

[0015] Through the threaded connection of the connecting pipe and the connecting seat, the connecting seat is convenient to disassemble and assemble. Through the limiting blocks on the inner wall of the mounting sleeve, the mounting sleeve is conveniently slidably sleeved on the outer wall of the heat conduction tube along the card slots, so that the heat dissipation fins are not easy to rotate on the surface of the heat conduction tube, solving the problem that it is difficult to align and limit a plurality of heat dissipation fins during welding. Through the bumps installed at the top end and the bottom end of the heat dissipation fins, the contact area between the top end and the bottom end of the heat dissipation fins and the air is increased. Through the rectangular holes formed on the surface of the heat dissipation fins, the contact area with the air can be further increased, thereby facilitating the improvement of the heat exchange efficiency of the PTC electric heater. Description of the Drawings

[0016] Figure 1 is the front view schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is of the present utility model Figure 1 the enlarged schematic diagram of the structure at A in;

[0018] Figure 3 is the exploded schematic diagram of the partial structure of the present utility model;

[0019] Figure 4 is the cross-sectional schematic diagram of the heat conduction tube structure of the present utility model;

[0020] Figure 5 is the three-dimensional schematic diagram of the heat dissipation fin structure of the present utility model;

[0021] Figure 6 is the top view schematic diagram of the heat dissipation fin structure of the present utility model.

[0022] In the figure: 1, heat conduction tube; 2, heating element; 3, heat conduction filler; 4, connecting pipe; 5, external thread; 6, connecting seat; 7, heat dissipation fin; 8, protective bent edge; 9, rectangular hole; 10, limiting block; 11, mounting sleeve; 12, card slot; 13, bump; 14, bolt; 15, connecting groove; 16, fixing plate. Detailed implementation mode

[0023] In order to clearly and completely describe the purpose and technical solution of the present utility model and make its advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0024] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] For the sake of simplicity and illustration, the principles of the embodiments are mainly described by referring to examples. In the following description, many specific details are set forth to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring these embodiments. Additionally, all embodiments can be used in combination with each other.

[0027] Please refer to Figures 1 to 6, the present utility model provides a technical solution: a finned PTC electric heater, including: a heat conduction tube 1, both ends of the heat conduction tube 1 are connected with connecting tubes 4, and one end of each of the two connecting tubes 4 is threadedly connected with a connecting seat 6; a heating element 2 is arranged inside the heat conduction tube 1, and a heat conduction filler 3 is arranged between the heating element 2 and the inner wall of the heat conduction tube 1 to facilitate improving the heat conduction effect. One end of each of the two connecting tubes 4 is fixedly installed at both ends of the heat conduction tube 1, external threads 5 are provided on the outer walls of the two connecting tubes 4, connecting grooves 15 are provided at one end of each of the two connecting seats 6 close to the connecting tubes 4, both of the two connecting tubes 4 are inserted into the connecting grooves 15 and are threadedly connected with the connecting grooves 15, and the outer wall of the connecting tube 4 is threadedly connected with the inner wall of the connecting groove 15 to facilitate the disassembly and assembly of the connecting seat 6. One end of each of the two connecting seats 6 is installed with a fixing plate 16, both of the two fixing plates 16 are L-shaped, and bolts 14 are threadedly installed on the bottom surfaces of both of the two fixing plates 16 to facilitate the fixation of the fixing plates 16.

[0028] Radiating fins 7 are arranged on the outer wall of the heat conduction tube 1, bumps 13 are installed at the top and bottom ends of the radiating fins 7, and a plurality of rectangular holes 9 are evenly arranged on the surface of the radiating fins 7; a plurality of radiating fins 7 are evenly arranged, each radiating fin 7 is a rectangular plate, a plurality of bumps 13 are fixedly installed at the top and bottom ends of each radiating fin 7, and each bump 13 is a trapezoidal tooth to facilitate increasing the contact area between the top and bottom ends of the radiating fins 7 and the air. Protective flanges 8 are fixedly connected to the side walls on both sides of each radiating fin 7, which can increase the edge thickness of the radiating fins 7 and prevent injury caused by accidentally touching the edges of the radiating fins 7.

[0029] An installation sleeve 11 is installed at one end of the radiating fin 7 close to the heat conduction tube 1, a limiting block 10 is connected to the inner wall of the installation sleeve 11, and a clamping groove 12 is provided on the outer wall of the heat conduction tube 1 close to the limiting block 10. Four clamping grooves 12 are provided and symmetrically arranged on the outer wall of the heat conduction tube 1, and four limiting blocks 10 are fixedly installed on the inner wall of each installation sleeve 11 to facilitate inserting the limiting blocks 10 into the clamping grooves 12 to limit the installation sleeve 11.

[0030] When the device works, through the threaded connection between the connecting tube 4 and the connecting seat 6, it is convenient to disassemble and assemble the connecting seat 6. Through the limiting block 10 on the inner wall of the installation sleeve 11, it is convenient to slide and sleeve the installation sleeve 11 on the outer wall of the heat conduction tube 1 along the clamping groove 12, so that the radiating fins 7 are not easy to rotate on the surface of the heat conduction tube 1, solving the problem of difficult alignment and limitation of multiple radiating fins 7 during welding. Through the bumps 13 installed at the top and bottom ends of the radiating fins 7, it is convenient to increase the contact area between the top and bottom ends of the radiating fins 7 and the air. Through the rectangular holes 9 arranged on the surface of the radiating fins 7, the contact area with the air can be further increased, so that the fluidity between multiple radiating fins 7 is better, and thus it is convenient to improve the heat exchange efficiency of the PTC electric heater.

[0031] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A finned PTC electric heater, comprising: A heat conducting pipe (1), characterized in that: both ends of the heat conducting pipe (1) are connected to connecting pipes (4), and one end of the two connecting pipes (4) is threadedly connected to a connecting seat (6); The outer wall of the heat conducting pipe (1) is provided with a heat dissipation fin (7), the top and bottom ends of the heat dissipation fin (7) are both provided with a bump (13), and the surface of the heat dissipation fin (7) is evenly provided with a plurality of rectangular holes (9); A mounting sleeve (11) is installed at one end of the heat dissipation fin (7) close to the heat conducting pipe (1), the inner wall of the mounting sleeve (11) is connected to a limiting block (10), and a clamping groove (12) is provided on the outer wall of the heat conducting pipe (1) close to the limiting block (10).

2. The finned PTC electric heater according to claim 1, characterized in that: A heating body (2) is arranged inside the heat-conducting pipe (1), and a heat-conducting filler (3) is arranged between the heating body (2) and the inner wall of the heat-conducting pipe (1).

3. The finned PTC electric heater according to claim 1, characterized in that: One end of the two connecting pipes (4) is fixedly mounted on the two ends of the heat conducting pipe (1); the outer walls of the two connecting pipes (4) are provided with external threads (5); the ends of the two connecting seats (6) close to the connecting pipes (4) are provided with connecting grooves (15); the two connecting pipes (4) are inserted into the connecting grooves (15) and are threadedly connected to the connecting grooves (15).

4. The finned PTC electric heater according to claim 1, characterized in that: A fixing plate (16) is installed at one end of the two connecting seats (6), the two fixing plates (16) are both L-shaped, and bolts (14) are threadedly installed on the bottom end surfaces of the two fixing plates (16).

5. The finned PTC electric heater according to claim 1, characterized in that: A plurality of heat dissipation fins (7) are evenly arranged, each heat dissipation fin (7) is a rectangular plate, a plurality of protrusions (13) are fixedly mounted on the top and bottom ends of each heat dissipation fin (7), and each protrusion (13) is a trapezoidal tooth.

6. The finned PTC electric heater according to claim 5, characterized in that: Both side walls of each heat dissipation fin (7) are fixedly connected with protective bent edges (8).

7. The finned PTC electric heater according to claim 1, characterized in that: The clamping grooves (12) are provided with four and are symmetrically opened on the outer wall of the heat conducting pipe (1), and four limit blocks (10) are fixedly installed on the inner wall of each mounting sleeve (11).

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