CN214148113U

CN214148113U - Heating rod structure of electric heating stove

Info

Publication number: CN214148113U
Application number: CN202022975394.6U
Authority: CN
Inventors: 陈文华
Original assignee: Zhejiang Taichang New Energy Co ltd
Current assignee: Zhejiang Taichang New Energy Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-07
Anticipated expiration: 2030-12-08

Abstract

The utility model belongs to the technical field of the electrical heating equipment and specifically relates to a heating rod structure of electric heating stove is related to. The utility model provides an electric heating stove's heating rod structure, is including the electric heating outer tube that is the U type, the both ends of electric heating outer tube be provided with respectively and draw forth the stick, be provided with resistance heating wire in the electric heating outer tube, resistance heating wire both ends respectively with draw forth the stick and be connected, resistance heating wire toward keeping away from continuous draw forth the stick direction and set up respectively to straightway, changeover portion and heating section all be the heliciform, the pitch of changeover portion department be greater than the pitch of heating section department. The utility model discloses can reduce the difference in temperature of the electric heating rod zone of heating and the non-zone of heating joining region department for this local stress reduces, is difficult to produce the fracture, and life is longer.

Description

Heating rod structure of electric heating stove

Technical Field

The utility model belongs to the technical field of the electrical heating equipment and specifically relates to a heating rod structure of electric heating stove is related to.

Background

The present directly-heated electric heating stove is the common equipment of family's heating, and this type of electric heating stove passes through heating element and turns into heat energy with the electric energy, heats medium water, heats through the circulation of medium water. The heating elements of electric heating furnaces are mostly resistance type, electromagnetic induction type, and semiconductor (PTC) type, wherein the resistance type is mainly the type of electric heating rod (rod). The electric heating rod (rod) mainly comprises a resistance heating wire, magnesium oxide powder, a stainless steel outer tube, a leading-out rod, a dental floss joint and the like.

Resistance heating wire in the present electric heating rod usually designs with even spiral winding mode, and in the electric heating stove long-term operation in-process of using electric heating formula, the junction of the zone of heating of electric heating rod and the non-zone of heating causes local stress too big because the difference of temperature difference between them is too big, leads to junction stainless steel outer tube to take place cyclic annular fracture, produces the short circuit phenomenon in the medium water entering inside magnesium oxide powder appears easily, has reduced electric heating rod's life.

Disclosure of Invention

The utility model discloses mainly be to current electric heating stove at the long-term operation in-process, the junction of the zone of heating of electric heating rod and the non-zone of heating is because the difference of temperature difference between them can arouse local stress too big, lead to junction stainless steel outer tube to take place cyclic annular fracture, the medium water appears easily and produces short circuit phenomenon in getting into inside magnesium oxide powder, the problem of the life of electric heating rod has been reduced, a difference in temperature that can reduce the zone of heating of electric heating rod and non-zone of heating department is provided, make this local stress reduce, be difficult to produce the fracture, the longer electric heating stove's of life heating rod structure.

The purpose of the utility model is mainly realized by the following scheme: the utility model provides an electric heating stove's heating rod structure, is including the electric heating outer tube that is the U type, the both ends of electric heating outer tube be provided with respectively and draw forth the stick, be provided with resistance heating wire in the electric heating outer tube, resistance heating wire both ends respectively with draw forth the stick and be connected, resistance heating wire toward keeping away from continuous draw forth the stick direction and set up respectively to straightway, changeover portion and heating section all be the heliciform, the pitch of changeover portion department be greater than the pitch of heating section department. The two ends of the electric heating outer pipe are respectively provided with a leading-out bar, the electric heating outer pipe is internally provided with a resistance heating wire, the two ends of the resistance heating wire are respectively connected with the leading-out bar, the resistance heating wire is welded on the leading-out bar, the resistance heating wire is respectively arranged into a straight line section, a transition section and a heating section towards the direction far away from the connected leading-out bar, the heating value of the straight line section is less, and the straight line section can play a better role in conducting electricity and transition, the transition section and the heating section are both in a spiral shape, the pitch of the transition section is larger than that of the heating section, the heating value of the transition section is smaller than that of the heating section, and the transition step-by-step can also play a better role in transition, the temperature difference between the heating section and a non-heating section can be reduced, the heating section plays a normal heating role, the uniform spiral winding mode of the current resistance heating wire is changed into a three-section winding mode, and the electric heating rod is changed into a three-section surface load distribution from the original uniform surface load distribution, the wiring mode enables the surface temperature near the joint of the heating area and the non-heating area of the electric heating rod to be reduced step by step, and the local stress of the original joint can be reduced, so that the electric heating outer pipe is not easy to break, and the service life is longer.

Preferably, the pitch at the transition section is 1.5 to 2.5 times the pitch at the heating section. The pitch size at the transition section is 1.5-2.5 times of the pitch size at the heating section, and the transition section can play a good effect in the range.

Preferably, the pitch of the transition section is 2 times the pitch of the heating section. The pitch size at the transition section is 2 times of the pitch size at the heating section, and the effect that the transition section can realize is the best at this moment.

Preferably, the resistance heating wire is made of Cr20Ni 80. The resistance heating wire is made of Cr20Ni80, has good cold deformation plasticity and good weldability, and cannot generate brittle fracture after long-term use.

Preferably, the length of the straight section is 15mm, and the length of the transition section is 25 mm. The length of the straight line section is 15mm, the length of the transition section is 25mm, and the size design can enable the straight line section and the transition section to achieve a good using effect.

Therefore, the utility model discloses an electric heating stove's heating rod structure possesses following advantage: the utility model discloses simple structure can reduce the difference in temperature of the electric heating rod zone of heating and the non-zone of heating joining district department for this local stress reduces, is difficult to produce the fracture, and life is longer.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the electric heating water tank of the present invention.

Illustration of the drawings: the heating device comprises a heating device, a heating device and a heating system, wherein the heating device comprises a heating unit 1, an electric heating water tank 2, an electric heating rod 3, an electric heating outer tube 4, a heating zone 5, a resistance heating wire 6, a lead-out rod 7, a water outlet pipe 8, a water inlet pipe 9, a non-heating zone 10, magnesium oxide powder I, a straight line segment I, a transition segment II and a heating segment III.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in figure 1, a heating rod structure of an electric heating stove comprises a U-shaped electric heating outer pipe 3, two ends of the electric heating outer pipe 3 are respectively provided with a leading-out rod 6, a resistance heating wire 5 is arranged in the electric heating outer pipe 3, two ends of the resistance heating wire 5 are respectively connected with the leading-out rod 6, the resistance heating wire 5 is welded on the leading-out rod 6, the resistance heating wire 5 is respectively arranged into a straight line section I, a transition section II and a heating section III towards the direction of the leading-out rod 6 far away from the connection, the heating amount of the straight line section I is less, better conduction and transition effects can be achieved, the transition section II and the heating section III are both spiral, the screw pitch of the transition section II is larger than that of the heating section III, the heating amount of the transition section II is smaller than that of the heating section III, better step-by-step transition effects can also be achieved, the temperature difference between a heating zone 4 and a non-heating zone 9 can be reduced, the heating section III can achieve normal heating effect, through changing the even spiral winding mode of present resistance heater 5 into syllogic wire winding mode, change electric heating rod 2 into syllogic surface load distribution by former even surface load distribution, such wiring mode makes near the surface temperature of the zone of heating 4 and the 9 junctions in the non-zone of heating of electric heating rod 2 reduce step by step, can reduce the local stress of former junction, thereby make electric heating outer tube 3 be difficult to produce the fracture, the dielectric water can not appear and produce the short circuit phenomenon in getting into inside magnesia 10, long service life.

The pitch of the transition section II is 1.5-2.5 times that of the heating section III, and the transition section II can achieve a good effect in the range; the pitch size of II departments of changeover portion is 2 times of the pitch size of III departments of heating, and the effect that II departments of changeover portion can realize this moment is the best.

The resistance heating wire 5 is made of Cr20Ni80, has good cold deformation plasticity and good weldability, and does not generate brittle fracture after long-term use.

The length of straightway I is 15mm, and the length of transition section II is 25mm, and such size design can make straightway I and transition section II play better result of use.

As shown in fig. 2, the electric heating rod 2 is installed in the electric heating water tank 1, and the electric heating water tank 1 is provided with a water inlet pipe 8 and a water outlet pipe 7, so that the medium water can be heated by the electric heating rod 2; electric heating rod 2 on the existing market is shorter, can be with 4 length extension in the district of heating of electric heating rod 2, reduces electric heating rod 2's whole surface load, reduces its surface temperature that generates heat, is difficult to produce local vaporization when heating medium water, and its surface area that generates heat is bigger moreover, and heating medium water effect is better.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. The utility model provides an electric heating stove's heating rod structure, is including the electric heating outer tube that is the U type, its characterized in that, the both ends of electric heating outer tube be provided with respectively and draw forth the stick, be provided with resistance heating wire in the electric heating outer tube, resistance heating wire both ends respectively with draw forth the stick and be connected, resistance heating wire toward keeping away from continuous draw forth the stick direction and set up respectively to straightway, changeover portion and heating section all be the heliciform, the pitch of changeover portion department be greater than the pitch of heating section department.

2. A heating rod structure of an electric heating stove according to claim 1, wherein the size of the pitch at the transition section is 1.5 times to 2.5 times the size of the pitch at the heating section.

3. A heating rod structure of an electric heating stove according to claim 2, wherein the size of the pitch at the transition section is 2 times the size of the pitch at the heating section.

4. A heating rod structure of an electric heating stove according to claim 1, 2 or 3, wherein the resistance heating wire is made of Cr20Ni 80.

5. A heating rod structure of an electric heating stove as claimed in claim 1, 2 or 3, wherein the length of the straight section is 15mm and the length of the transition section is 25 mm.