阅读说明：本技术 一种高效率的电热管 (Efficient electrothermal tube ) 是由 宋书兴 宋昌平 于春玲 于 2019-12-31 设计创作，主要内容包括：一种高效率的电热管，属于家电设备领域。包括电热管内管（3），在电热管内管（3）内设置有电阻丝（2），在电热管内管（3）两端开口处分别设置有一个与电阻丝（2）两端对应连接的接线柱（1），其特征在于：电热管内管（3）开口端的至少一端曲率发生改变；在电热管内管（3）的外圈还设置有电热管外管（4），电热管外管（4）的内壁与电热管内管（3）的外壁贴合，电热管外管（4）的至少一侧形成平面。在本高效率的电热管中，设置电热管外管，并在电热管外管的侧部形成平面，增加了电热管与家电发热盘的接触面积，使电热管加热更为均匀，因此可以省略与电热管配合的金属导热板，大大降低了家电的材料成本和工艺成本。(An efficient electric heating tube belongs to the field of household electrical appliances. Including electrothermal tube inner tube (3), be provided with resistance wire (2) in electrothermal tube inner tube (3), be provided with one respectively at electrothermal tube inner tube (3) both ends opening part and correspond terminal (1) of being connected, its characterized in that with resistance wire (2) both ends: the curvature of at least one end of the opening end of the electric heating tube inner tube (3) is changed; the outer ring of the electric heating tube inner tube (3) is also provided with an electric heating tube outer tube (4), the inner wall of the electric heating tube outer tube (4) is attached to the outer wall of the electric heating tube inner tube (3), and at least one side of the electric heating tube outer tube (4) forms a plane. In the high-efficiency electric heating tube, the outer tube of the electric heating tube is arranged, and the side part of the outer tube of the electric heating tube forms a plane, so that the contact area between the electric heating tube and the household appliance heating disc is increased, the electric heating tube is heated more uniformly, a metal heat-conducting plate matched with the electric heating tube can be omitted, and the material cost and the process cost of the household appliance are greatly reduced.)

1. The utility model provides an efficient electrothermal tube, includes annular electrothermal tube inner tube (3), is provided with resistance wire (2) in electrothermal tube inner tube (3), is provided with one respectively at electrothermal tube inner tube (3) both ends opening part and corresponds terminal (1) of being connected, its characterized in that with resistance wire (2) both ends: the curvature of at least one end of the opening end of the electric heating tube inner tube (3) is changed; the outer ring of the electric heating tube inner tube (3) is also provided with an electric heating tube outer tube (4), the inner wall of the electric heating tube outer tube (4) is attached to the outer wall of the electric heating tube inner tube (3), and at least one side of the electric heating tube outer tube (4) forms a plane.

2. The high efficiency electrical heating tube according to claim 1, wherein: the outer tube (4) of the electric heating tube is made of aluminum.

3. The high efficiency electrical heating tube according to claim 1, wherein: the electrothermal tube inner tube (3) both ends outside bending type become a set of parallel section that is parallel to each other, the length of parallel section and terminal (1) is 10mm ~600mm, the interval between the edge is 8mm ~500mm in the parallel section of both sides.

4. The high efficiency electrical heating tube according to claim 1, wherein: one end of the opening end of the electric heating tube inner tube (3) is bent to the radial inner side or the radial outer side to form a first circular arc (5), and the other end of the electric heating tube inner tube (3) is bent to the radial opposite direction to form a second circular arc (6);

the included angle formed by the tangent line of the arc top of the first arc (5) and the straight line in the vertical direction is 25-120 degrees, the included angle formed by the tangent line of the arc top of the second arc (6) and the straight line in the vertical direction is 30-150 degrees, and the distance between the binding posts (1) at the upper and lower ports of the inner tube (3) of the electric heating tube is 8-100 mm.

5. The high efficiency electrical heating tube according to claim 1, wherein: one end of the opening end of the electric heating tube inner tube (3) is bent to the radial inner side to form a third arc (8), and the bent end is positioned on the inner side of the unbent end;

the radius of the third arc (8) is 5 mm-200 mm, and the distance between the binding posts (1) at the upper and lower ports of the inner tube (3) of the electric heating tube is 8 mm-100 mm.

6. The high efficiency electrical heating tube according to claim 1, wherein: one end of the opening end of the electric heating tube inner tube (3) is bent twice to the radial inner side to form a fourth arc (9) and a fifth arc (10) in sequence, and the bent end is positioned on the inner side of the unbent end;

the radius of the fourth arc (9) is 5 mm-200 mm, and the radius of the fifth arc (10) is 5 mm-200 mm.

7. The high efficiency electrical heating tube according to claim 1, wherein: one end of the opening end of the electric heating tube inner tube (3) is bent towards the radial inner side to form a sixth arc (11), and a straight tube is designed between the end part of the sixth arc (11) and the end point of the bent end of the electric heating tube inner tube (3); the radius of the sixth arc (11) is 5 mm-200 mm.

8. The high efficiency electrical heating tube according to claim 1, wherein: the left end and the right end of the opening end of the electric heating tube inner tube (3) are bent towards the axial direction of the annular surface of the electric heating tube inner tube (3) again to form vertical sections, the radius of the electric heating tube inner tube (3) is 40 mm-500 mm, and the distance between two binding posts (1) of the electric heating tube inner tube (3) is 6 mm-100 mm.

9. The high efficiency electrical heating tube according to claim 1, wherein: the inner tube (3) of the electric heating tube is filled with an insulating material (7).

10. The high efficiency electrical heating tube according to claim 1, wherein: the section of the electric heating tube outer tube (4) is semicircular, circular or polygonal.

Technical Field

An efficient electric heating tube belongs to the field of household electrical appliances.

Background

In the prior art, a heating element of a household appliance (such as an electric heating pot) generally adopts an electric heating tube, the structure of the existing electric heating tube is shown in fig. 16, a section of resistance wire 2 is arranged inside a shell 13 of the electric heating tube, two openings of the shell 13 of the electric heating tube are respectively provided with a binding post 1, the binding posts 1 at two ends are respectively connected with two ends of the resistance wire 2, insulating materials are filled between the resistance wire 2, the binding posts 1 and the inner wall of the shell 13 of the electric heating tube to play an insulating effect, when the electric heating tube is in actual use, a power supply is loaded on the two binding posts 1.

Because the shell 13 of the electric heating tube is circular, the contact area between the electric heating tube and the pan bottom is small when the electric heating tube is directly fixed at the pan bottom, so that the heat emitted by the electric heating tube cannot be directly transferred to the pan bottom, thereby causing a great deal of waste of heat. The prior art has the following solving means: the electric heating tube is characterized in that two metal plates wrapping the electric heating tube are arranged, one of the two metal plates is a flat plate, the other metal plate is provided with a plurality of grooves with the same shape as the electric heating tube, the two metal plates are attached after the electric heating tube is sequentially placed into the corresponding grooves, a heating assembly is formed by heating with a welding flux, and then the heating assembly is welded to the bottom of the household appliance. When the heating assembly is formed, a certain distance needs to be reserved between each heating pipe so that the electric heating pipe and the metal plate can be tightly pressed by a practical tool, and therefore, the electric heating pipes cannot be arranged more intensively due to the process limitation of the prior art, and the arrangement quantity of the electric heating pipes is influenced. Meanwhile, the space occupied by the electric heating tube is enlarged, the requirement on the assembly technology is higher, and certain influence is caused on the appearance of the product. In addition, because a metal plate for wrapping the electric heating tube needs to be arranged, the process is more complex particularly when the groove for placing the electric heating tube is pressed on the plate body, and the product cost is increased.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the electric heating tube overcomes the defects of the prior art, provides a high-efficiency electric heating tube which is provided with an electric heating tube outer tube and forms a plane at the side part of the electric heating tube outer tube, increases the contact area of the electric heating tube and a household appliance heating disc, enables the heated part of the household appliance to be more uniform, improves the heating efficiency, can omit a metal heat-conducting plate matched with the electric heating tube, and greatly reduces the material cost and the process cost of the household appliance.

The technical scheme adopted by the invention for solving the technical problems is as follows: this efficient electrothermal tube, including annular electrothermal tube inner tube, be provided with the resistance wire in the electrothermal tube inner tube, be provided with a terminal of being connected with the resistance wire both ends correspondence respectively at electrothermal tube inner tube both ends opening part, its characterized in that: the curvature of at least one end of the opening end of the inner tube of the electric heating tube is changed; the outer ring of the electric heating tube inner tube is also provided with an electric heating tube outer tube, the inner wall of the electric heating tube outer tube is attached to the outer wall of the electric heating tube inner tube, and at least one side of the electric heating tube outer tube forms a plane.

Preferably, the outer tube of the electric heating tube is made of aluminum.

Preferably, the two ends of the opening end of the inner tube of the electric heating tube are bent outwards to form a group of parallel sections which are parallel to each other, the length of each parallel section and the length of each binding post are 10 mm-600 mm, and the distance between the inner edges of the parallel sections at the two sides is 8 mm-500 mm.

Preferably, one end of the opening end of the inner tube of the electric heating tube is bent towards the radial inner side or the radial outer side to form a first circular arc, and the other end of the inner tube of the electric heating tube is bent towards the radial opposite direction to form a second circular arc;

the included angle formed by the tangent line of the first arc top and the straight line in the vertical direction is 25-120 degrees, the included angle formed by the tangent line of the second arc top and the straight line in the vertical direction is 30-150 degrees, and the distance between the binding posts at the upper and lower ports of the inner tube of the electric heating tube is 8-100 mm.

Preferably, one end of the opening end of the electric heating tube inner tube is bent towards the radial inner side to form a third arc, and the bent end is positioned at the inner side of the unbent end;

the radius of the third arc is 5 mm-200 mm, and the distance between the binding posts at the upper and lower ports of the inner tube of the electric heating tube is 8 mm-100 mm.

Preferably, one end of the opening end of the inner tube of the electric heating tube is bent twice to the radial inner side to form a fourth arc and a fifth arc in sequence, and the bent end is positioned at the inner side of the unbent end;

the radius of the fourth arc is 5 mm-200 mm, and the radius of the fifth arc is 5 mm-200 mm.

Preferably, one end of the opening end of the inner tube of the electric heating tube is bent towards the radial inner side to form a sixth arc, and a straight tube is designed between the end part of the sixth arc and the end point of the bent end of the inner tube of the electric heating tube; the radius of the sixth arc is 5 mm-200 mm.

Preferably, the left end and the right end of the opening end of the inner tube of the electric heating tube are bent towards the axial direction of the annular surface of the inner tube of the electric heating tube again to form vertical sections, the radius of the inner tube of the electric heating tube is 40 mm-500 mm, and the distance between two binding posts of the inner tube of the electric heating tube is 6 mm-100 mm.

Preferably, the electric heating tube is internally filled with an insulating material.

Preferably, the cross section of the outer tube of the electric heating tube is semicircular, circular or polygonal.

Compared with the prior art, the invention has the beneficial effects that:

1. in the high-efficiency electric heating tube, the outer tube of the electric heating tube is arranged, and the side part of the outer tube of the electric heating tube forms a plane, so that the contact area between the electric heating tube and the household appliance heating disc is increased, and the heated part of the household appliance is heated more uniformly. Because the heating is more uniform, the heating efficiency is improved, so that manufacturers can omit a metal heat conducting plate matched with the electric heating pipe, the material cost and the process cost of the household appliance are greatly reduced, and the weight of the electric heating pot is greatly reduced.

2. Because the high-efficiency electric heating tube is adopted, the heating performance is more excellent compared with the existing electric heating cooker.

3. Because the metal plate matched with the electric heating pipe is not needed to be arranged, the arrangement quantity and the arrangement mode of the electric heating pipe at the bottom of the pan are more flexible.

Drawings

Fig. 1 is a top view of an embodiment 1 of the high efficiency electrical heating tube.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a sectional view taken along a line a-a in fig. 1.

Figure 4 is the top view of the embodiment 2 of the high efficiency electrical heating tube.

Figure 5 is the top view of the embodiment 3 of the high efficiency electrical heating tube.

Figure 6 is the top view of the embodiment 4 of the high efficiency electrical heating tube.

Figure 7 is the top view of the embodiment 5 of the high efficiency electrical heating tube.

Figure 8 is the top view of the high efficiency electrothermal tube embodiment 6.

Figure 9 is the top view of the embodiment 7 of the high efficiency electrical heating tube.

Figure 10 is the top view of the embodiment 8 of the high efficiency electrical heating tube.

Figure 11 is the top view of the embodiment 9 of the high efficiency electrical heating tube.

Figure 12 is a top view of the embodiment 10 of the high efficiency electrical heating tube.

Figure 13 is the top view of the embodiment 11 of the high efficiency electrical heating tube.

Figure 14 is the front view of the embodiment 12 of the high efficiency electrical heating tube.

Figure 15 is the top view of the embodiment 13 of the high efficiency electrical heating tube.

Fig. 16 is a top view of a prior art electrical heating tube.

Wherein: 1. the electric heating tube comprises a binding post 2, a resistance wire 3, an electric heating tube inner tube 4, an electric heating tube outer tube 5, a first arc 6, a second arc 7, an insulating material 8, a third arc 9, a fourth arc 10, a fifth arc 11, a sixth arc 12, a seventh arc 13 and an electric heating tube shell.

Detailed Description

Fig. 1 to 3 are preferred embodiments of the present invention, and the present invention will be further described with reference to fig. 1 to 16.