CN220273896U - Electric heating pipe assembly - Google Patents

Abstract

The utility model discloses an electric heating pipe assembly, which comprises an outer housing, a heating pipe and a temperature control pipe, wherein wiring terminals are arranged in the outer housing, wiring terminals of the heating pipe and the temperature control pipe respectively extend into the bottom of the outer housing, the heating pipe is connected with the temperature control pipe in series and is controlled to be on-off by the temperature control pipe, the heating pipe and the temperature control pipe are electrically connected with an external power supply by the wiring terminals, and an enamel layer is covered outside the heating pipe. According to the utility model, the enamel layer is arranged on the outer side of the heating pipe, so that the anti-corrosion effect is good after long-term use, the internal circuit is neat and messy, the wire connection is difficult to loosen, the upper end and the lower end of the O-shaped end piece connected with the heating pipe are extruded by the fastening nut and cannot loosen, the stability of electric connection is kept, the heating pipe adopts an L-shaped bending structure and a wider U-shaped closed end, the heating efficiency is improved, a double-layer sealing structure is adopted between the temperature control pipe and the wire, water is prevented from entering the outer cover, and the use of a heating circuit is influenced.

Description

Electric heating pipe assembly

Technical Field

The utility model relates to the technical field of heating pipe production, in particular to an electric heating pipe assembly.

Background

With the improvement of the living standard of people, the water heater becomes a stock electrical appliance in home, wherein the demand proportion of the electric water heater is larger. The heating device commonly called as an electric heating pipe is one of the most critical components in the electric water heater, and is used as a heating component of the water heater to be in an aqueous medium for a long time, the working environment temperature is high, the self forming structure is complex, the reliability of the water heater is easily influenced by corrosion, meanwhile, the heating device is used for a long time, the temperature difference change is large, the loosening of wiring is easily generated, the components are easily damaged, and the reliability of the temperature control device is poor, so that the use of the heating device is influenced.

The patent document with the document number of CN213028591U discloses an electric heating pipe component with high fixing strength, which comprises a supporting base and four electric heating pipes which are fixed on the supporting base and are uniformly distributed in the circumferential direction, wherein the electric heating pipe component with high fixing strength also comprises a plurality of supporting plates which are distributed along the length direction of the electric heating pipe, each supporting plate is arranged in an area surrounded by the four electric heating pipes, the outer edge of each supporting plate is provided with a groove for embedding the electric heating pipe part at the corresponding position, the position of each groove is provided with a pressing hoop for pressing the electric heating pipe, and the two ends of each pressing hoop are fixed with the supporting plates; the electric heating pipes can be mutually fixed and mutually supported, so that deformation or bending of the electric heating pipes can be effectively avoided, and the service life of the electric heating pipes can be prolonged.

The scheme can improve the service life of the electric heating tube. But at the same time is easy to exist: the common heating pipe has poor corrosion resistance, and the long-term use affects the performance; the internal circuit of the heating component is messy, the installation of the heating component is affected, the connection of the electric heating pipe is not easy to firmly connect, and the use of the heating component is affected when the temperature control pipe is damaged.

Disclosure of Invention

The utility model aims to provide an electric heating tube component which improves the corrosion resistance of a heating tube, and meanwhile, the internal circuit is standardized to keep the connection of the heating tube firm, so that the damage of a temperature control tube is prevented from affecting the use of a heating device.

The aim of the utility model can be achieved by the following technical scheme: an electric heating tube component comprises an outer housing, a heating tube and a temperature control tube;

a wiring terminal is arranged in the outer housing;

the heating pipe and the wiring end of the temperature control pipe extend into the bottom of the outer shell respectively, and the heating pipe is connected with the temperature control pipe in series and is controlled to be on-off through the temperature control pipe;

the heating pipe and the temperature control pipe are electrically connected with an external power supply through a wiring terminal;

the outer part of the heating pipe is covered with an enamel layer.

Further: the heating pipe and the temperature control pipe are electrically connected with a wire of the wiring terminal, a glass fiber pipe is sleeved outside the wire, and the glass fiber pipe is fixed in the outer housing through a self-locking binding belt.

Further: the temperature control pipe is connected with an O-shaped end piece at the end part of a conducting wire of the heating pipe, the O-shaped end piece is sleeved on a terminal post of the heating pipe, fastening nuts are arranged on the upper side and the lower side of the O-shaped end piece, and a flat gasket and a spring cushion are arranged between the O-shaped end piece and the fastening nuts in a cushioning mode.

Further: the temperature control tube comprises a tube shell, a temperature controller and a fuse wire are arranged in the tube shell, one end of the temperature controller is electrically connected with the fuse wire, the other end of the temperature controller is connected with the fuse wire in series, and the other end of the fuse wire is electrically connected with the other wire.

Further: the double-layer sealing structure comprises a rubber plug for sealing a gap between the two wires and an opening of the tube shell, and further comprises sealing silica gel covered on the outer surface of the rubber plug.

Further: the right view of the heating pipe is approximately L-shaped, the top view of the heating pipe is approximately U-shaped, and the width of the U-shaped closed end of the heating pipe is larger than that of the U-shaped open end of the heating pipe.

Further: the bottom of the outer shell is provided with a flanging at the edge of the through hole into which the heating pipe and the temperature control pipe extend.

The utility model has the beneficial effects that:

1. according to the utility model, the enamel layer is arranged on the outer side of the heating pipe, so that the surface of the heating pipe is kept smooth, the enamel layer is not easy to adsorb precipitate ions, the growth of crystal lattice of precipitate is prevented, scale is easy to peel off from the enamel layer of the electric heating pipe, the corrosion resistance effect of the heating pipe is improved, and the service life of the heating pipe is prolonged.

2. The heating pipes are connected in series with a temperature control pipe, the temperature control pipe detects the temperature of the use environment of the heating pipes according to the setting, and the heating pipes are automatically disconnected or communicated, so that the automatic temperature control of the heating pipes is realized.

3. The glass fiber tube is sleeved outside the connecting wire between the binding post and the heating tube and the temperature control tube for arrangement, line management is standardized, lines are kept neat and not messy, wiring is facilitated, meanwhile, the glass fiber tube is fixed on the inner wall of the outer cover through the self-locking binding belt, stable connection of the wire and the binding post, stable connection of the heating tube and the temperature control tube can be kept, and connection of the wire is not easy to loosen.

4. The temperature control pipe is connected with the end part of the conducting wire of the heating pipe and is connected with the O-shaped end piece, the upper end and the lower end of the conducting wire and the O-shaped end piece are respectively extruded by the fastening nut, and a flat gasket and an elastic cushion are arranged between the O-shaped end piece and the fastening nut in a cushioning manner, so that the O-shaped end piece is firmly fixed on the wiring end post of the heating pipe and cannot loosen, and the stability of electric connection is kept.

5. The heating pipe adopts L type kink structure to save the required space of heating device installation, and the U type blind end of heating pipe has great width can increase heating area simultaneously, further improves heating efficiency.

6. The fuse wire is arranged in the temperature control tube to improve the use safety of the heating device, and meanwhile, a double-layer sealing structure is adopted between the temperature control tube and the lead wire, so that water is prevented from entering the outer housing due to damage of the temperature control tube, and the use of a heating circuit is affected.

Drawings

FIG. 1 is a schematic view of an electrical heating tube assembly according to the present utility model;

FIG. 2 is a probability cross-sectional view of the utility model from the right of FIG. 1;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a schematic illustration of the connection of the terminal post to the O-ring terminal block of the present utility model;

FIG. 5 is a front view of FIG. 1 in accordance with the present utility model;

FIG. 6 is a schematic view of the internal structure of the temperature control tube according to the present utility model;

FIG. 7 is a schematic diagram of the right-side view of the heating tube according to the present utility model;

FIG. 8 is a schematic top view of a heating tube according to the present utility model.

100. An outer housing; 110. a bottom case; 120. a fitting housing; 130. a connection terminal; 140. a through hole; 150. flanging; 160. a connecting seat; 200. heating pipes; 300. a temperature control tube; 310. a tube shell; 320. a temperature controller; 330. a fuse; 340. a rubber stopper; 350. sealing silica gel; 360. an evanescent surface; 400. an enamel layer; 510. a glass fiber tube; 520. self-locking ribbon; 530. an O-shaped end piece; 540. a fastening nut; 550. a flat gasket; 560. spring leveling; 570. and (5) connecting terminal posts.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

As shown in fig. 1 to 8, the present utility model discloses an electric heating tube assembly including an outer housing 100, a heating tube 200, and a temperature control tube 300;

a connection terminal 130 is disposed in the outer casing 100;

the wiring ends of the heating pipe 200 and the temperature control pipe 300 respectively extend into the bottom of the outer housing 100, and the heating pipe 200 is connected with the temperature control pipe 300 in series and the on-off of the heating pipe 200 is controlled by the temperature control pipe 300;

the heating pipe 200 and the temperature control pipe 300 are electrically connected with an external power supply through a connecting terminal 130; the heating tube 200 is covered with an enamel layer 400 at the outside.

As shown in fig. 2 and 5, the outer shell 100 includes a bottom shell 110 and an accessory shell 120, the bottom shell 110 is made of metal material, such as 304 stainless steel, and is installed in other electrical appliances through the bottom shell 110 to facilitate the installation of the heating device, the accessory shell 120 may be made of plastic material, a connection terminal 130 is disposed in the accessory shell 120, a connection base 160 is disposed above the accessory shell 120, the connection base 160 is externally connected with a power wire, and the connection base 160 is electrically connected with the connection terminal 130 according to the polarity of the wire.

The bottom shell 110 is provided with the through hole 140 for the heating pipe 200 and the temperature control pipe 300 to extend in, the edge of the through hole 140 is like the flange 150 on the inner side of the bottom shell 110, and the flange 150 increases the contact surface between the bottom shell 110 and the heating pipe 200 and the temperature control pipe 300, so that the heating pipe 200 and the temperature control pipe 300 can be firmly connected with the bottom shell 110, and the loosening is not easy to occur.

The bottom shell 110 can be connected with the heating pipe 200 and the temperature control pipe 300 in a connection mode such as welding or adhesive connection, and waterproof silica gel is coated between the flange 150 of the through hole 140 of the bottom shell 110 and the heating pipe 200 and the temperature control pipe 300, so that water is prevented from entering the bottom shell 110, and a heating circuit in the bottom shell 110 is prevented from being damaged.

The connecting terminal 130 is divided into an L terminal, an N terminal and a ground terminal, when the connecting terminal is connected, the L terminal is firstly connected with the temperature control tube 300 and is connected with the heating tube 200 in series through the temperature control tube 300, the N terminal is connected with the heating tube 200, the ground terminal is connected with the bottom shell 110 to form ground protection, and the temperature control tube 300 is connected with the temperature control tube 300 in series through the heating tube 200, so that the temperature control tube 300 can control the heating tube 200.

The heating pipe 200 is a heating core component, is subjected to the influences of water quality, high temperature, water pressure and the like in a complex cold and hot circulation environment for a long time, is easily influenced by various corrosive media and corrosion promotion conditions, and is covered with the enamel layer 400 outside the heating pipe 200, so that the surface of the heating pipe 200 can be kept smooth, the surface roughness of the electric heating pipe 200 is greatly reduced, the produced scale on the surface is loose and is not easy to adhere, the enamel layer 400 is not easy to adsorb precipitate ions, the growth of crystal lattice of precipitate is prevented, tiny steam bubbles are continuously produced on the surface in the heating process, the peeling force of the scale is given, the scale is easily peeled off from the enamel layer 400 of the electric heating pipe 200, the corrosion resistance effect of the heating pipe 200 is improved, and the service life of the heating pipe 200 is prolonged.

As shown in fig. 2, the glass fiber tube 510 is sleeved outside the connecting wires between the L terminal, the N terminal and the ground terminal and the heating tube 200 and the temperature control tube 300 for arrangement, so that the line management is standardized, the lines are kept neat and not messy, the wiring is convenient, and meanwhile, the glass fiber tube 510 is fixed on the inner wall of the outer housing 100 through the self-locking binding tape 520, so that the stable connection of the wires and the connecting terminals 130, the heating tube 200 and the temperature control tube 300 can be kept, and the connection of the wires is not easy to loosen.

When the heating pipe 200 works, larger current is needed, the stability of the connection between the heating pipe 200 and the wire is required to be ensured, a single-sided nut crimping mode is adopted in the traditional connection, the connection between the heating pipe 200 and the wire is not firm and is easy to loosen, and the use of the heating device is affected.

As shown in fig. 4, the end of the wire of the temperature control tube 300 connected with the heating tube 200 is connected with an O-shaped end piece 530, the wire and the O-shaped end piece 530 can be connected by welding or extrusion of a wire harness, the connection end post 570 of the heating tube 200 is provided with threads, after the O-shaped end piece 530 is sheathed on the connection end post 570 of the heating tube 200, the upper end and the lower end of the O-shaped end piece 530 are respectively extruded by a fastening nut 540, and a flat gasket 550 and a spring flat 560 are arranged between the O-shaped end piece 530 and the fastening nut 540 in a cushioning manner, so that the O-shaped end piece 530 can be firmly fixed on the connection end post 570 of the heating tube 200 without loosening, and the stability of electrical connection is maintained.

Further, as shown in fig. 7 and 8, the right view of the heating tube 200 is approximately, the top view of the heating tube 200 is approximately U-shaped, the width of the U-shaped closed end of the heating tube 200 is greater than the width of the U-shaped open end of the heating tube 200, the L-shaped bending structure can save the space required for installing the heating device, and meanwhile, the heating area can be increased due to the larger width of the U-shaped closed end of the heating tube 200, so that the heating efficiency is further improved.

As shown in fig. 6, the temperature control tube 300 includes a tube shell 310, a temperature controller 320 and a fuse 330 are disposed in the tube shell 310, the temperature controller 320 can adopt an electronic temperature controller, a digital temperature controller 320, a liquid expansion temperature controller 320 or a pressure temperature controller 320, and the heating tube 200 is opened when the set temperature is reached, so that the control of the temperature control tube 300 on the heating tube 200 is realized, the temperature controller 320 is also connected with the fuse 330 in series, when the temperature is too high, the fuse 330 opens the heating tube 200 through fusing, and the continuous rising of the heating temperature caused by the fault of the temperature control tube 300 is prevented through the fuse 330, thereby affecting the use safety of the heating device.

One end of the temperature controller 320 is electrically connected to the fuse 330 connected in series to the other end of the L-wire introduced from the connection terminal 130, and the other end of the fuse 330 is electrically connected to the wire introduced into the heating pipe 200.

To achieve accurate temperature sensing, the end of the tube housing 310 of the temperature control tube 300 is often provided with an evanescent surface 360, and the tube housing 310 is often not formed in one piece due to process and cost limitations, resulting in cracking of the tube housing 310 when heated at the seam, and water entering the outer housing 100.

The two wires of the temperature control tube 300 are sealed with the tube shell 310, a double-layer sealing structure is adopted, one layer of the temperature control tube passes through the rubber plug 340 by using the two wires, the rubber plug 340 is positioned at the opening of the temperature control tube 300, the gap between the two wires and the temperature control tube 300 is sealed by elastic extrusion of the rubber plug 340, the surface of the rubber plug 340 close to the outlet side is coated with a layer of sealing silica gel 350, the gap between the two wires and the tube shell 310 is further sealed in a waterproof manner, and the phenomenon that water enters the outer housing 100 due to the damage of the temperature control tube 300 can be prevented, and the use of a heating circuit is affected.

The principle of the utility model is as follows: according to the utility model, the enamel layer 400 is arranged on the outer side of the heating pipe 200, the corrosion-resistant effect is good in long-term use, meanwhile, the glass fiber tube 510 is sleeved on the outer side of the internal connecting wire to finish, the line is kept neat and not messy, the line is fixed, the wire connection is not easy to loosen, the upper end and the lower end of the O-shaped end piece 530 connected with the heating pipe 200 are extruded by the fastening nut 540 and cannot loosen, the stability of electric connection is kept, the heating pipe 200 adopts an L-shaped bending structure and a wider U-shaped closed end, the heating efficiency is improved, and meanwhile, the double-layer sealing structure is adopted between the temperature control pipe 300 and the wire, so that water is prevented from entering the outer housing 100, and the use of a heating circuit is influenced.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Claims (7)

1. An electric heating tube assembly, characterized in that: comprises an outer housing (100), a heating pipe (200) and a temperature control pipe (300);

a wiring terminal (130) is arranged in the outer shell (100);

the wiring ends of the heating pipe (200) and the temperature control pipe (300) respectively extend into the bottom of the outer housing (100), and the heating pipe (200) is connected with the temperature control pipe (300) in series and the on-off of the heating pipe (200) is controlled through the temperature control pipe (300);

the heating pipe (200) and the temperature control pipe (300) are electrically connected with an external power supply through a wiring terminal (130);

the heating pipe (200) is externally covered with an enamel layer (400).

2. An electric heating tube assembly as set forth in claim 1 wherein: the heating pipe (200) and the temperature control pipe (300) are electrically connected with the wire outside of the wiring terminal (130) in a sleeved mode, a glass fiber pipe (510) is arranged on the outer side of the wire, and the glass fiber pipe (510) is fixed in the outer housing (100) through a self-locking binding belt (520).

3. An electric heating tube assembly as set forth in claim 1 wherein: the temperature control pipe (300) is connected with an O-shaped end piece (530) at the end part of a wire connected with the heating pipe (200), the O-shaped end piece (530) is sleeved on a wiring end post (570) of the heating pipe (200), fastening nuts (540) are arranged on the upper side and the lower side of the O-shaped end piece (530), and a flat gasket (550) and a spring flat (560) are arranged between the O-shaped end piece (530) and the fastening nuts (540) in a cushioning mode.

4. An electric heating tube assembly as set forth in claim 1 wherein: the temperature control pipe (300) comprises a pipe shell (310), a temperature controller (320) and a fuse wire (330) are arranged in the pipe shell (310), one end of the temperature controller (320) is electrically connected with the other end of the lead wire, the fuse wire (330) is connected in series, and the other end of the fuse wire (330) is electrically connected with the other lead wire.

5. An electric heating tube assembly as set forth in claim 4 wherein: the temperature control pipe (300) is internally provided with a double-layer sealing structure between two wires and the pipe shell (310), the double-layer sealing structure comprises a rubber plug (340) for sealing a gap between the two wires and an opening of the pipe shell (310), and further comprises sealing silica gel (350) covered on the outer surface of the rubber plug (340).

6. An electric heating tube assembly as set forth in claim 1 wherein: the right view of the heating pipe (200) is approximately L-shaped, the top view of the heating pipe (200) is approximately U-shaped, and the width of the U-shaped closed end of the heating pipe (200) is larger than that of the U-shaped open end of the heating pipe (200).

7. An electric heating tube assembly as set forth in claim 1 wherein: the bottom of the outer shell (100) is provided with a flanging (150) at the edge of a through hole (140) into which the heating pipe (200) and the temperature control pipe (300) extend.