Tubular PTC electric heater

Abstract

The utility model discloses a tubular PTC (Positive Temperature Coefficient) electric heater, which relates to the field of PTC electric heaters and comprises a tubular shell, the tubular shell is of a hollow structure, a fan mounting port and an air outlet are integrally formed at the top and the bottom of the tubular shell respectively, and inner cavities of the fan mounting port and the air outlet are communicated with an inner cavity of the tubular shell. Hollow annular butt joint holes are integrally formed in the two ends of the tubular shell, the butt joint holes are communicated with an inner cavity of the tubular shell, and butt joint plates matched with the inner walls of the butt joint holes are connected to the inner walls of the butt joint holes in an inserted mode. A limiting mechanism is rotationally installed at the end, away from the tubular shell, of the butt joint hole. The tubular shell is arranged, the PTC electric heater is installed in the tubular shell, the tubular shell prevents heat from diffusing to the periphery, relatively good heat collection effect is achieved, and meanwhile the PTC electric heater and the tubular shell can be conveniently installed through the limiting mechanism.

Description

Technical Field

[0001] The utility model relates to the field of PTC heaters, and specifically relates to a tubular PTC electric heater. Background Art

[0002] A PTC electric heater is an electric heating device with an automatic constant temperature effect. During operation, it has the phenomenon of "not glowing red", and its safety is relatively high, and it can be applied to a bathroom heater device.

[0003] During the operation of the existing PTC heaters, the generated heat is prone to dissipate to the surroundings, and some heat diffuses downward through the wind without playing a role, and relatively speaking, the heat collection effect is not good. Summary of the Invention

[0004] The purpose of the utility model is to provide a tubular PTC electric heater to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A tubular PTC electric heater, including a tubular outer shell, the tubular outer shell is of a hollow structure, and a fan installation port and an air outlet are integrally formed at the top and bottom of the tubular outer shell respectively. The inner cavities of the fan installation port and the air outlet are communicated with the inner cavity of the tubular outer shell. At both ends of the tubular outer shell, a hollow annular docking hole is integrally formed. The docking hole is communicated with the inner cavity of the tubular outer shell. A docking plate that fits with the inner wall of the docking hole is inserted into the inner wall of the docking hole.

[0006] A limiting mechanism is rotatably installed at one end of the docking hole far from the tubular outer shell, and the limiting mechanism is used to limit the docking plate inserted into the docking hole.

[0007] As a further scheme of the utility model: A PTC electric heater is installed between the two docking plates. The PTC electric heater is composed of a heat dissipation aluminum plate and a PTC heating ceramic. A wire is connected to the PTC electric heater and penetrates through one of the docking plates and extends outward.

[0008] As a further scheme of the utility model: The limiting mechanism includes a protruding shaft integrally formed at one end of the docking hole far from the tubular outer shell. One end of the tubular outer shell has two protruding shafts, and the two protruding shafts are symmetrically arranged up and down. A limiting plate is rotatably connected to the outer wall of the protruding shaft. The limiting plate coinciding with the docking plate is fixedly connected to the docking plate by bolts, and through holes for the bolts to insert are formed on the limiting plate.

[0009] As a further scheme of the utility model: Threaded holes are formed on the docking plate, and the threaded holes are threadedly connected with the bolts.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. By providing a tubular outer shell and installing the PTC electric heater in the tubular outer shell, the tubular outer shell prevents heat from diffusing in all directions, and relatively has a better heat collection effect. At the same time, by providing a limiting mechanism, it is convenient to install the PTC electric heater and the tubular outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is a schematic structural diagram of the tubular outer shell of the present utility model;

[0014] Figure 3 is a schematic installation diagram of the PTC electric heater of the present utility model;

[0015] Figure 4 is a schematic structural diagram of the limiting mechanism of the present utility model.

[0016] In the figure: 1. Tubular outer shell; 2. Fan installation opening; 3. Air outlet; 4. Docking hole; 5. Docking plate; 6. PTC electric heater; 7. Wire; 8. Limiting plate; 9. Screw hole; 10. Through hole; 11. Protruding shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a tubular PTC electric heater includes a tubular outer shell 1. The tubular outer shell 1 has a hollow structure, and a fan installation opening 2 and an air outlet 3 are integrally formed at the top and bottom of the tubular outer shell 1 respectively. The inner cavities of the fan installation opening 2 and the air outlet 3 are connected to the inner cavity of the tubular outer shell 1. Docking holes 4 in the shape of a hollow ring are integrally formed at both ends of the tubular outer shell 1. The docking holes 4 are connected to the inner cavity of the tubular outer shell 1. A docking plate 5 that fits the inner wall of the docking hole 4 is inserted into the inner wall of the docking hole 4; a limiting mechanism is rotatably installed at one end of the docking hole 4 away from the tubular outer shell 1, and the limiting mechanism is used to limit the docking plate 5 inserted into the docking hole 4.

[0019] In this embodiment: During assembly, first insert the two docking plates 5 into the inner cavity of the docking holes 4 respectively until the two docking plates 5 are completely accommodated by the two docking holes 4. At this time, the PTC heater 6 is located in the inner cavity of the tubular housing 1. Then rotate the limiting mechanism until it aligns with the end face of the docking plate 5, and then use bolts to fix it. The limiting mechanism restricts the end face of the docking plate 5, preventing the two docking plates 5 from moving, thus completing the fixation of the PTC heater 6.

[0020] After that, install the fan in the inner cavity of the fan installation opening 2. After the fan is installed, connect the device to power and start it. At this time, the PTC heater 6 operates to generate heat, and the fan operates to blow the generated heat out through the air outlet 3, realizing the directional downward flow of heat, avoiding the large-scale diffusion of heat when it is generated, and having a better heat collection effect.

[0021] Please refer particularly to Figure 1 , a PTC heater 6 is installed between the two docking plates 5. The PTC heater 6 is composed of a heat dissipation aluminum plate and a PTC heating ceramic. A wire 7 is connected to the PTC heater 6 and penetrates through one docking plate 5 and extends outward.

[0022] In this embodiment: After the PTC heater 6 is powered on, the resistance value of the PTC heating ceramic increases as the temperature rises, the composition increases, and the generated heat is higher until it reaches the Curie temperature (250 degrees Celsius). At this time, the resistance value of the PTC ceramic no longer changes, realizing the automatic constant temperature heating effect.

[0023] Please refer particularly to Figure 3 and Figure 4 , the limiting mechanism includes a protruding shaft 11 integrally formed at one end of the docking hole 4 away from the tubular housing 1. One end of a tubular housing 1 has two protruding shafts 11, and the two protruding shafts 11 are symmetrically arranged up and down. The outer wall of the protruding shaft 11 is rotatably connected to a limiting plate 8. The limiting plate 8 that coincides with the docking plate 5 is fixedly connected to the docking plate 5 by bolts, and a through hole 10 for inserting the bolts is provided on the limiting plate 8.

[0024] In this embodiment: After the two docking plates 5 are completely accommodated by the docking holes 4, at this time, rotate the limiting plate 8. The limiting plate 8 rotates around the protruding shaft 11 as the axis, and the limiting plate 8 rotates from a state where it is misaligned with the docking plate 5 to a state where it coincides with the docking plate 5, and the paper through hole 10 aligns with the screw hole 9.

[0025] Please refer particularly to Figure 3 and Figure 4 , screw holes 9 are provided on the docking plate 5, and the screw holes 9 are threadedly connected to the bolts.

[0026] In this embodiment: After the through hole 10 is aligned with the screw hole 9, insert a bolt into the through hole 10 and dock it with the screw hole 9. At this time, rotate the bolt, and the bolt is threadedly connected to the screw hole 9 to complete the fixation of the position of the limiting plate 8. This installation method can quickly connect the tubular housing 1 and the PTC electric heater 6 relatively quickly.

[0027] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A tubular PTC electric heater, comprising a tubular outer shell (1), characterized in that, The tubular housing (1) has a hollow structure, and a fan mounting opening (2) and an air outlet (3) are integrally formed at the top and bottom of the tubular housing (1) respectively. The inner cavities of the fan mounting opening (2) and the air outlet (3) are communicated with the inner cavity of the tubular housing (1). At both ends of the tubular housing (1), a hollow annular docking hole (4) is integrally formed. The docking hole (4) is communicated with the inner cavity of the tubular housing (1). A docking plate (5) that fits with the inner wall of the docking hole (4) is inserted into the inner wall of the docking hole (4). A limiting mechanism is rotatably installed at one end of the docking hole (4) away from the tubular housing (1). The limiting mechanism is used to limit the docking plate (5) inserted into the docking hole (4).

2. The tubular PTC electric heater according to claim 1, characterized in that A PTC electric heater (6) is installed between the two docking plates (5). The PTC electric heater (6) is composed of a heat dissipation aluminum plate and a PTC heating ceramic. A wire (7) is connected to the PTC electric heater (6) and extends outwards through one of the docking plates (5).

3. The tubular PTC electric heater according to claim 1, characterized in that, The limiting mechanism includes a protruding shaft (11) integrally formed at one end of the docking hole (4) away from the tubular housing (1). One end of the tubular housing (1) has two protruding shafts (11). The two protruding shafts (11) are symmetrically arranged up and down. The outer wall of the protruding shaft (11) is rotatably connected to a limiting plate (8). The limiting plate (8) that coincides with the docking plate (5) is fixedly connected to the docking plate (5) by bolts. A through hole (10) for the insertion of bolts is formed in the limiting plate (8).

4. A tubular PTC electric heater according to claim 3, characterized in that, A threaded hole (9) is formed in the docking plate (5). The threaded hole (9) is threadedly connected to the bolt.

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