PTC (Positive Temperature Coefficient) electric heater with waterproof performance

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) electric heaters, in particular to a waterproof PTC electric heater, which comprises a heat-conducting aluminum pipe, a heating core body is arranged in the heat-conducting aluminum pipe, and one end of the heating core body is connected with a wire; the connecting sleeve is sleeved outside the threaded pipe in a threaded manner, so that the connecting sleeve can be conveniently mounted, the sealing performance between the connecting sleeve and the threaded pipe can be conveniently improved through the first sealing ring in the connecting sleeve, and the sealing performance at the joint of the connecting sleeve and the wire can be conveniently improved through the sealing sleeve connected with one end of the connecting sleeve; by means of the trapezoidal opening formed in the outer wall of the abutting sleeve, the connection tightness of the wire and the sealing sleeve can be conveniently enhanced through the abutting sleeve, the abutting bolt is rotated to enable the abutting plate to be inserted into the abutting groove, the abutting sleeve can be conveniently abutted and fixed, and even if the wire moves, the sealing performance of the connecting position of the wire and the connecting sleeve is not easily affected. Therefore, external water vapor is not easy to enter along the lead, and the waterproof performance of the PTC electric heater is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC electric heaters, in particular to a PTC electric heater with waterproof performance. Background Technique

[0002] The PTC heating element, also known as a PTC heater, is composed of a PTC ceramic heating element and an aluminum tube. It is an automatic constant temperature and power-saving electric heater. Its outstanding feature lies in its safety performance. Under any application conditions, it will not produce the surface "reddening" phenomenon of heaters such as electric heating tubes, thus causing safety hazards such as scalding and fire. It is widely used in equipment that needs to provide warm air, such as air conditioners, hot air curtain machines, dehumidifiers, dryers, clothes dryers, warm air heaters, bathroom heaters, and automobiles.

[0003] In the prior art, when the PTC electric heater is used in an environment with high humidity, sealant is usually applied to the head and tail of the PTC electric heater to prevent external water vapor from entering the interior of the PTC electric heater and contacting the PTC heating element, resulting in poor electrical performance. However, when moving the wire of the PTC electric heater, the sealing performance at the connection between the PTC electric heater and the wire is poor, making it easy for external water vapor to enter along the wire, affecting the waterproof performance of the PTC electric heater. For this reason, we propose a PTC electric heater with waterproof performance. Content of the Utility Model

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

[0005] To achieve the above purpose, the utility model provides the following technical solution: A PTC electric heater with waterproof performance, comprising: a heat-conducting aluminum tube, a heating core is arranged inside the heat-conducting aluminum tube, one end of the heating core is connected with a wire, a threaded tube is installed at one end of the heat-conducting aluminum tube close to the wire, a connecting sleeve is threadedly connected to the outer wall of the threaded tube, and a first sealing ring is installed inside the connecting sleeve;

[0006] One end of the connecting sleeve far from the heat-conducting aluminum tube is connected with a sealing sleeve, a tightening sleeve is sleeved outside the sealing sleeve, and a trapezoidal opening is formed on the outer wall of one end of the tightening sleeve;

[0007] One end of the connecting sleeve close to the tightening sleeve is fixedly connected with a fixing plate, a tightening bolt is installed on the surface of the fixing plate, and a tightening plate is installed at one end of the tightening bolt close to the tightening sleeve.

[0008] Preferably, one end of the threaded tube is fixedly connected with one end of the heat-conducting aluminum tube, sealant is provided between one end of the connecting sleeve and the heat-conducting aluminum tube, and internal threads are provided on the inner wall of one end of the connecting sleeve close to the threaded tube.

[0009] Preferably, a wire threading hole is formed at one end of the connecting sleeve close to the wire. A second sealing ring is installed on the inner wall of the wire threading hole. The second sealing ring is in an H shape and is tightly connected to the outer wall of the wire.

[0010] Preferably, the sealing sleeve is in a conical shape and is sleeved on the outer wall of the wire. A plugging slot is formed at one end of the connecting sleeve close to the sealing sleeve. One end of the sealing sleeve is inserted into the plugging slot, and the other end of the sealing sleeve is fixedly connected to the inner wall of the pressing sleeve.

[0011] Preferably, two trapezoidal openings are symmetrically formed. One ends of the two trapezoidal openings close to the connecting sleeve are both connected and communicated with the opening of the pressing sleeve. Two pressing slots are symmetrically formed on the outer wall of the pressing sleeve.

[0012] Preferably, two fixing plates are symmetrically arranged. Threaded fastening bolts are installed at one ends of the two fixing plates. One ends of the two fastening bolts close to the pressing slots are both fixedly connected to the adjacent pressing plates.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By threadedly sleeving the connecting sleeve on the outside of the threaded pipe, the installation of the connecting sleeve is facilitated. Through the first sealing ring inside the connecting sleeve, the sealing performance between the connecting sleeve and the threaded pipe is improved. Through the sealing sleeve connected to one end of the connecting sleeve, the sealing performance at the connection between the connecting sleeve and the wire is improved. Through the trapezoidal openings formed on the outer wall of the pressing sleeve, the connection tightness between the wire and the sealing sleeve is strengthened through the pressing sleeve. By rotating the fastening bolts to make the pressing plates insert into the pressing slots, the pressing sleeve is tightly fixed, so that even when the wire moves, it is not easy to affect the sealing performance at the connection with the connecting sleeve, and it is not easy for external water vapor to enter along the wire, thus preventing the waterproof performance of the PTC electric heater from being affected. Description of the Drawings

[0015] Figure 1 is the front view schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is the present utility model Figure 1 the enlarged schematic diagram of the structure at A in;

[0017] Figure 3 is the three-dimensional sectional view schematic diagram of the partial structure of the present utility model;

[0018] Figure 4 is the present utility model Figure 3 the enlarged schematic diagram of the structure at B in;

[0019] Figure 5 is the exploded schematic diagram of the partial structure of the present utility model.

[0020] In the figure: 1. Heating core; 2. Heat-conducting aluminum tube; 3. Conducting wire; 4. Threaded tube; 5. Sealant; 6. First sealing ring; 7. Connecting sleeve; 8. Internal thread; 9. Wire-passing hole; 10. Second sealing ring; 11. Tightening sleeve; 12. Trapezoidal opening; 13. Sealing sleeve; 14. Insertion slot; 15. Tightening slot; 16. Tightening plate; 17. Tightening bolt; 18. Fixed plate. Specific embodiments

[0021] In order to clearly and completely describe the purpose, technical solution of the present utility model and make the advantages more clear, 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.

[0022] 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 understood 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 understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined 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.

[0024] 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.

[0025] Please refer to Figures 1 to 5 Figures 1 to 5 , the present utility model provides a technical solution: a PTC electric heater with waterproof performance, including: a heat-conducting aluminum tube 2, a heating core 1 is arranged inside the heat-conducting aluminum tube 2, one end of the heating core 1 is connected with a wire 3, a threaded tube 4 is installed at one end of the heat-conducting aluminum tube 2 close to the wire 3, a connecting sleeve 7 is threadedly connected to the outer wall of the threaded tube 4, and a first sealing ring 6 is installed inside the connecting sleeve 7; one end of the threaded tube 4 is fixedly connected to one end of the heat-conducting aluminum tube 2, a sealing glue 5 is arranged between one end of the connecting sleeve 7 and the heat-conducting aluminum tube 2, an internal thread 8 is opened on the inner wall of one end of the connecting sleeve 7 close to the threaded tube 4, and the sealing glue 5 is convenient for strengthening the sealing performance of the connection between the connecting sleeve 7 and the heat-conducting aluminum tube 2.

[0026] One end of the connecting sleeve 7 far from the heat-conducting aluminum tube 2 is connected with a sealing sleeve 13, an abutting sleeve 11 is sleeved outside the sealing sleeve 13, and a trapezoidal opening 12 is opened on the outer wall of one end of the abutting sleeve 11; a wire passing hole 9 is opened at one end of the connecting sleeve 7 close to the wire 3, a second sealing ring 10 is installed on the inner wall of the wire passing hole 9, the second sealing ring 10 is of an H shape and is closely connected to the outer wall of the wire 3, which is convenient for limiting the H-shaped second sealing ring 10 and making the second sealing ring 10 not easy to move. The sealing sleeve 13 is conical and sleeved on the outer wall of the wire 3, a plugging groove 14 is opened at one end of the connecting sleeve 7 close to the sealing sleeve 13, one end of the sealing sleeve 13 is inserted into the plugging groove 14, the other end of the sealing sleeve 13 is fixedly connected to the inner wall of the abutting sleeve 11, and one end of the abutting sleeve 11 is fixedly adhered to the outer wall of the wire 3 by glue. Two trapezoidal openings 12 are symmetrically arranged, and one end of the two trapezoidal openings 12 close to the connecting sleeve 7 is communicated with the opening of the abutting sleeve 11, and two abutting grooves 15 are symmetrically arranged on the outer wall of the abutting sleeve 11. Through the two trapezoidal openings 12, when the abutting sleeve 11 is squeezed, the sealing sleeve 13 can be deformed and closely connected to the outer wall of the wire 3.

[0027] One end of the connecting sleeve 7 close to the abutting sleeve 11 is fixedly connected with a fixing plate 18, a tightening bolt 17 is installed on the surface of the fixing plate 18, and a tightening plate 16 is installed at one end of the tightening bolt 17 close to the abutting sleeve 11. Two fixing plates 18 are symmetrically arranged, tightening bolts 17 are threadedly installed at one end of the two fixing plates 18, and one end of the two tightening bolts 17 close to the abutting groove 15 is fixedly connected to the adjacent tightening plate 16, which is convenient for adjusting the position of the tightening plate 16 sleeved by rotating the tightening bolt 17.

[0028] When the device works, the connecting sleeve 7 is threadedly sleeved outside the threaded pipe 4, which facilitates the installation of the connecting sleeve 7. Through the first sealing ring 6 inside the connecting sleeve 7, the inner wall of the connecting sleeve 7 and the end of the threaded pipe 4 far from the heat-conducting aluminum pipe 2 are tightly connected. Through the sealant 5 between the connecting sleeve 7 and the heat-conducting aluminum pipe 2, it is convenient to strengthen the sealing performance at the connection between the connecting sleeve 7 and the heat-conducting aluminum pipe 2, thereby improving the waterproof performance between the connecting sleeve 7 and the threaded pipe 4. By installing the H-shaped second sealing ring 10 in the wire-passing hole 9, the second sealing ring 10 is not easy to move, and the connection tightness between the wire-passing hole 9 and the wire 3 is improved. Through the sealing sleeve 13 connected to one end of the connecting sleeve 7, it is convenient to improve the sealing performance at the connection between the connecting sleeve 7 and the wire 3. Through the trapezoidal opening 12 formed in the outer wall of the tightening sleeve 11, it is convenient to strengthen the connection tightness between the wire 3 and the sealing sleeve 13 through the tightening sleeve 11. By rotating the tightening bolt 17, the tightening plate 16 is inserted into the tightening groove 15, which is convenient to tighten and fix the tightening sleeve 11. Even when the wire 3 moves, it is not easy to affect the sealing performance at the connection with the connecting sleeve 7, so that external water vapor is not easy to enter along the wire 3, preventing the waterproof performance of the PTC electric heater from being affected.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations 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 PTC electric heater with waterproof performance, comprising: The heat-conducting aluminum tube (2) is characterized in that: a heating core (1) is arranged inside the heat-conducting aluminum tube (2), one end of the heating core (1) is connected to a wire (3), a threaded tube (4) is installed at one end of the heat-conducting aluminum tube (2) close to the wire (3), the outer wall of the threaded tube (4) is threadedly connected to a connecting sleeve (7), and a first sealing ring (6) is installed inside the connecting sleeve (7); The end of the connecting sleeve (7) away from the heat-conducting aluminum tube (2) is connected to a sealing sleeve (13), the outer portion of the sealing sleeve (13) is sleeved with a tight sleeve (11), and a trapezoidal opening (12) is provided on the outer wall of one end of the tight sleeve (11); The end of the connecting sleeve (7) close to the pressing sleeve (11) is fixedly connected to a fixing plate (18), a pressing bolt (17) is installed on the surface of the fixing plate (18), and the end of the pressing bolt (17) close to the pressing sleeve (11) is installed with a pressing plate (16).

2. A waterproof PTC electric heater according to claim 1, characterized in that: One end of the threaded tube (4) is fixedly connected to one end of the heat-conducting aluminum tube (2), a sealant (5) is provided between one end of the connecting sleeve (7) and the heat-conducting aluminum tube (2), and an internal thread (8) is provided on the inner wall of one end of the connecting sleeve (7) close to the threaded tube (4).

3. The waterproof PTC electric heater according to claim 1, characterized in that: The connecting sleeve (7) is provided with a threading hole (9) at one end close to the wire (3), and a second sealing ring (10) is installed on the inner wall of the threading hole (9). The second sealing ring (10) is H-shaped and is tightly connected to the outer wall of the wire (3).

4. The waterproof PTC electric heater according to claim 1, characterized in that: The sealing sleeve (13) is tapered and sleeved on the outer wall of the wire (3); an inserting groove (14) is provided at one end of the connecting sleeve (7) close to the sealing sleeve (13); one end of the sealing sleeve (13) is inserted into the inserting groove (14); and the other end of the sealing sleeve (13) is fixedly connected to the inner wall of the abutting sleeve (11).

5. The waterproof PTC electric heater according to claim 1, characterized in that: Two trapezoidal openings (12) are symmetrically provided, and one end of the two trapezoidal openings (12) close to the connecting sleeve (7) is connected to the opening of the tightening sleeve (11), and two tightening grooves (15) are symmetrically provided on the outer wall of the tightening sleeve (11).

6. The waterproof PTC electric heater according to claim 1, characterized in that: Two fixing plates (18) are symmetrically arranged, and one end of each of the two fixing plates (18) is threadedly mounted with a clamping bolt (17), and one end of each of the two clamping bolts (17) close to the clamping groove (15) is fixedly connected to an adjacent clamping plate (16).

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