CN216873409U - Electric heater - Google Patents

Abstract

The utility model relates to an electric heater, electric heater include the heating member that supporting seat and two at least mutual intervals set up, and every heating member includes positive post, negative pole post and the portion of generating heat, and every positive post and every negative pole post all assemble in the supporting seat, and every both ends that generate heat that the portion is relative are connected with positive post and negative pole post in the same heating member respectively. The electric heater provided in the application has high heat transfer efficiency and has a small-volume electric heater.

Description

Electric heater

Technical Field

The application relates to the technical field of industrial smelting machinery, in particular to an electric heater.

Background

The method is a necessary step for industrially smelting metal aluminum by adopting an electric heater to melt an aluminum product and converting the aluminum product from a solid state to a liquid state. When the traditional electric heater is in contact with an aluminum product, the electric heater is electrified to convert electric energy into heat energy, and the heat energy is transferred to the aluminum product in a heat transfer mode so as to melt the aluminum product. However, the conventional electric heater with a small volume has low heat transfer efficiency, and the conventional electric heater with a high heat transfer efficiency has a large volume, so how to provide an electric heater with a high heat transfer efficiency and a small volume becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an electric heater with high heat transfer efficiency and small volume.

An electric heater, comprising:

a supporting seat; and

the heating device comprises at least two heating elements which are arranged at intervals, each heating element comprises a positive pole column, a negative pole column and a heating part, each positive pole column and each negative pole column are assembled on a supporting seat, and two opposite ends of each heating part are respectively connected with the positive pole column and the negative pole column in the same heating element;

each heating part is of a spiral line structure extending along a first direction, and all the heating parts share the same spiral central line.

In one embodiment, the spiral radius of all the heat generating portions is the same.

In one embodiment, the supporting seat has a first side, and the heat generating portion is located on the first side;

the electric heater also comprises a heat conducting part positioned on the first side, wherein the heat conducting part comprises a heat conducting pipe and a heat conducting medium, the heat conducting pipe is sleeved outside all the heating parts, and the heat conducting medium is filled in a gap between each heating part and the heat conducting pipe.

In one embodiment, the heat conducting medium is heat conducting powder.

In one embodiment, the heat conducting pipe is a silicon nitride ceramic pipe or a sialon ceramic pipe.

In one embodiment, the electric heater further comprises a heat insulation member connected between the heat conduction member and the support base and used for cutting off heat transfer between the heat conduction member and the support base.

In one embodiment, the support seat further has a second side opposite to the first side along a first direction and spaced apart from the first side, and each of the positive posts and each of the negative posts penetrate through the first side and the second side along the first direction;

the heat insulation piece comprises a heat insulation sleeve and heat insulation media, the heat insulation sleeve is connected to the supporting seat in a matched mode, the first direction penetrates through the first side and the second side, each positive pole and each negative pole are located outside the heat conduction pipe, the portions of the negative pole and the heat conduction pipe penetrate through the heat insulation sleeve, the heat insulation media are filled in each positive pole and the heat insulation sleeve, and each negative pole and a gap between the heat insulation sleeves.

In one embodiment, the heat insulation sleeve is a metal sleeve.

In one embodiment, the heat insulating sleeve is a hollow structure with one open end and one closed end, the open end of the heat insulating sleeve protruding out of the first side is in sealing contact with the heat conducting pipe, and the closed end of the heat insulating sleeve protrudes out of the second side;

the supporting seat further comprises insulating sealing pieces, each positive pole and each negative pole are all arranged in a penetrating mode at the opening end and the closed end of the heat insulation sleeve, each positive pole and each negative pole are all in close fit with the closed end of the heat insulation sleeve through the corresponding insulating sealing pieces.

In one embodiment, the insulating seal is a graphite member or a mica member.

The electric heater comprises at least two heating elements, and all heating parts of all the heating elements share the same spiral central line. Because the electric heater has at least two heating elements, the heat transfer efficiency of the electric heater can be effectively improved. In addition, all heating parts share the same spiral central line, so that the layout structure among all heating parts is more compact. Thus, the electric heater provided in the present application has both a high heat transfer efficiency and a small volume.

Drawings

FIG. 1 is a schematic view of an electrical heating element with a thermally conductive member removed in accordance with an embodiment of the present application;

fig. 2 is a front perspective view of the electric heating element shown in fig. 1 with a heat conductive member added.

Reference numerals:

1. an electric heater; 10. a supporting seat; 20. a heating member; 21. a positive post; 23. a negative pole post; 25. a heat generating portion; 30. a heat conductive member; 31. a heat conducting pipe; 33. a heat conducting medium; 40. a thermal insulation member; 41. a heat insulating sleeve; 412. an open end; 414. a closed end; 50. electrically connecting the connector; 51. inserting a sleeve; 53. a bearing plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

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

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2 together, the present application provides an electric heater 1, wherein the electric heater 1 can heat and melt a member 20 to be heated. The member to be heated 20 may be a member made of metal, plastic or other material. The electric heater 1 comprises a supporting seat 10, an electric connector 50 and at least two heating elements 20 arranged at intervals, wherein each heating element 20 is connected to the supporting seat 10 in a matching mode and used for heating the element 20 to be heated. The electrical connector 50 is disposed in an external environment and may be secured to a wall, table or other mounting surface in the external environment, and the heating element 20 is electrically connected to the electrical connector 50 to enable an external power source to power the heating element 20 via the electrical connector 50.

Each heating element 20 comprises a positive pole 21, a negative pole 23 and a heating part 25, each positive pole 21 and each negative pole 23 are assembled on the support seat 10, and two opposite ends of each heating part 25 are respectively connected with the positive pole 21 and the negative pole 23 in the same heating element 20. Each of the heat generating portions 25 is a spiral structure extending along the first direction, and all the heat generating portions 25 share the same spiral center line. The electrical connector 50 includes a receiving plate 53 fixed on a mounting surface of an external environment, and an inserting sleeve 51 coupled to the receiving plate 53, wherein the inserting sleeve 51 is provided with a plurality of positive connecting posts and a plurality of negative connecting posts, all the positive connecting posts are in one-to-one correspondence with all the positive posts 21, and all the negative connecting posts are in one-to-one correspondence with all the negative posts 23. Each positive post 21 and each negative post 23 protrudes from the second side and is electrically connected to the corresponding positive and negative posts, respectively. When the electric heater 1 is operated, an external power supply inputs current to the corresponding positive post 21 through each positive terminal, and then the current flows back to the external power supply through the corresponding heat generating portion 25 and the corresponding negative post 23.

Specifically, in order to ensure the reliability of the operation of the electric heater 1, in the present application, the positive and negative poles 21 and 23 in each of the heating members 20 are arranged at intervals in the second direction intersecting the first direction, the positive and negative poles 21 and 23 in each of the heating members 20 are not in contact with the positive and negative poles 21 and 23 in the other heating members 20, and the heat generating portion 25 in each of the heating members 20 is not in contact with the heat generating portions 25 in the other heating members 20, so as to prevent a short circuit.

Specifically, the included angle between the first direction and the second direction may be 30 °, 60 ° or 90 °, which may be specifically set as required. The following embodiments are described by taking the first direction as a vertical direction (a direction indicated by a double-headed arrow a in fig. 2) and the second direction (a direction indicated by a double-headed arrow b in fig. 2) as a horizontal direction as an example.

Due to the at least two heating members 20 of the electric heater 1 of the present application, a higher heat transfer efficiency is obtained compared to the prior art electric heater 1 having only one heating member 20. Since all the heating portions 25 of all the heating members 20 share the same spiral center line, the layout structure is more compact than that of the prior art in which a plurality of heating members 20 are arranged side by side in the second direction. Thus, the electric heater 1 provided in the present application has both a high heat transfer efficiency and a small volume. Preferably, the number of the heating members 20 is two, and the two heating members 20 can satisfy the requirement of high heat transfer efficiency and reduce the number of components of the electric heater 1.

Further, the spiral radius is the same for all the heat generating portions 25. Thus, each of the heat generating portions 25 coincides around the formed virtual cylinder, that is, the space occupied by each of the heat generating portions 25 coincides. In this way, the space occupied by all the heating members 20 can be greatly reduced, thereby facilitating the miniaturization of the electric heater 1.

In some embodiments, the support base 10 has a first side and a second side opposite to each other along the first direction and spaced apart from each other, the heat generating portion 25 is located on the first side, and each of the positive posts 21 and each of the negative posts 23 extends through the first side and the second side along the first direction. The electric heater 1 further comprises a heat conducting member 30 located at the first side, the heat conducting member 30 comprises a heat conducting pipe 31 and a heat conducting medium 33, the heat conducting pipe 31 is sleeved outside all the heat generating portions 25, and the heat conducting medium 33 is filled in a gap between each heat generating portion 25 and the heat conducting pipe 31. Specifically, each heat generating member 25 is entirely accommodated inside the heat conductive pipe 31. Alternatively, the heat conducting pipe 31 may be a hollow structure with two closed ends, and each of the positive pole 21 and the negative pole 23 is disposed through a closed end 414 of the heat conducting pipe 31 and extends out of the heat conducting pipe 31. Alternatively, the heat conduction pipe 31 may be a hollow structure with one open end and one closed end, and each positive pole 21 and each negative pole 23 are inserted into one open end of the heat conduction pipe 31 and extend out of the heat conduction pipe 31.

When the electric heater 1 is in operation, the heat conducting tube 31 and all the heating parts 25 are inserted into the container through the insertion holes on the container for holding the heating element 20 and are in contact with the heating element 20, and the supporting seat 10 is disc-shaped and the diameter of the supporting seat 10 is larger than the diameter of the insertion holes, so that the supporting seat 10 can be pressed against the outer surface of the container with the insertion holes to fix the electric heater 1. An external power supply supplies power to each heating member 20 so that heat generated by each heat generating portion 25 is transmitted to the member to be heated 20 sequentially through the heat conductive medium 33 and the heat conductive pipe 31. In the process of heat transfer, due to the arrangement of the heat-conducting medium 33 and the heat-conducting pipes 31, the heat generated by each heat generating portion 25 can be transferred to the member to be heated 20 more uniformly through the heat-conducting medium 33 and the heat-conducting pipes 31, so that the heat transfer is more uniform.

Specifically, the heat transfer medium 33 may be a heat transfer liquid, a heat transfer solid, or a heat transfer gas, and preferably, the heat transfer medium 33 is a heat transfer powder. The heat conductive powder has a small particle size, and the heat conductive medium 33 in powder form can more tightly fill the gap between each of the heat generating parts 25 and the inner wall of the heat conductive pipe 31, thereby allowing the electric heater 1 to have a better heat transfer efficiency.

Alternatively, the heat transfer medium 33 may be aluminum nitride powder, or boron nitride powder, or silicon nitride powder. The aluminum nitride powder or boron nitride powder has excellent heat conduction performance, and can effectively improve the heat transfer efficiency of the electric heater 1. In addition, the aluminum nitride powder or the boron nitride powder is inexpensive, and the manufacturing cost of the electric heater 1 can be reduced.

Preferably, the heat conductive pipe 31 is a silicon nitride ceramic pipe or a sialon ceramic pipe. The silicon nitride ceramic tube and the sialon ceramic tube have excellent thermal shock resistance, oxidation resistance, wear resistance and corrosion resistance, and are non-infiltrative to aluminum liquid, so that the service life of the heat-conducting member 30 can be effectively prolonged. Moreover, the silicon nitride ceramic tube and the sialon ceramic tube also have excellent heat conduction performance, so that the arrangement of the silicon nitride ceramic tube or the sialon ceramic tube can also contribute to improving the heat transfer efficiency of the electric heater 1. Preferably, the outer diameter of the heat conductive pipe 31 may be in the range of 22mm to 60mm, and the length is in the range of 500mm to 1500 mm. Of course, in other embodiments, the outer diameter and length of the heat conducting pipe 31 can be set according to requirements.

In an embodiment, the electric heater 1 further includes a heat insulating member 40, and the heat insulating member 40 is connected between the heat conductive member 30 and the support base 10 and is used for blocking heat transfer between the heat conductive member 30 and the support base 10. The heat insulating member 40 prevents heat generated by the heat generation of each heat generation portion 25 from being diffused to the support base 10 in the first direction, so that the heat can be concentratedly diffused to the member to be heated 20 by the heat conductive pipes 31, and thus the electric heater 1 has a better heat transfer effect.

Further, the heat insulating member 40 includes a heat insulating sleeve 41 and a heat insulating medium, the heat insulating sleeve 41 is coupled to the support 10 and penetrates the first side and the second side along the first direction, the portions of each positive pole 21 and each negative pole 23 outside the heat conducting pipe 31 penetrate the heat insulating sleeve 41, and the heat insulating medium is filled in the gap between each positive pole 21 and the heat insulating sleeve 41 and the gap between each negative pole 23 and the heat insulating sleeve 41. As a result, the heat insulating material 40 formed by combining the heat insulating sleeve 41 and the heat insulating medium can be completely insulated and blocked between the heat conductive material 30 and the support base 10, and the heat insulating efficiency can be further improved. Therefore, the electric heater 1 also has a better heat insulation efficiency.

Preferably, the insulating sleeve 41 is a metal sleeve. The metal sheath has a good mechanical strength, so that the service life of the electric heater 1 can be prolonged. Of course, the heat insulating sleeve 41 is not limited to the above one, and in other embodiments, the heat insulating sleeve 41 may be made of glass, ceramic or other materials that are resistant to high temperature and have a certain mechanical strength.

Preferably, the insulating medium is air. The air has a better heat insulation effect, and the air is convenient to obtain, so that the heat insulation piece 40 has lower manufacturing cost and heat insulation performance. Of course, the insulating medium is not limited to the above-mentioned one, and in other embodiments, the insulating medium may be an insulating liquid or an insulating solid having a better insulating effect.

Further, the heat insulating jacket 41 has a hollow structure with one open end and one closed end, and the open end 412 of the heat insulating jacket 41 protruding from the first side is in sealing contact with the heat transfer pipe 31, so as to prevent external moisture from entering the heat insulating jacket 41 through a gap between the open end 412 of the heat insulating jacket 41 and the heat transfer pipe 31 and causing electric leakage. The closed end 414 of the insulating sleeve 41 protrudes from the second side.

The support base 10 further includes insulating sealing members, each positive post 21 and each negative post 23 are disposed through the open end 412 and the closed end 414 of the heat insulating sleeve 41, and each positive post 21 and each negative post 23 are tightly fitted with the closed end 414 of the heat insulating sleeve 41 through the corresponding insulating sealing members.

Specifically, there are a plurality of insulating sealing members, and a part of the insulating sealing members corresponds to all the positive posts 21 one by one, and the other part of the insulating sealing members corresponds to all the negative posts 23 one by one. The end face of the closed end 414 of the heat insulation sleeve 41 is provided with a plurality of avoiding holes, part of the avoiding holes correspond to all the positive poles 21 one by one, and the rest of the avoiding holes correspond to all the negative poles 23 one by one. Each positive pole 21 and each negative pole 23 are respectively arranged in the corresponding position-avoiding holes, extend out of the heat insulation sleeve 41 and are electrically connected with the electric connector 50. Specifically, each insulating sealing member is an annular sealing ring, and each insulating sealing member is sleeved on the positive post 21 or the negative post 23 corresponding to the insulating sealing member and is used for sealing the hole wall of the avoidance hole corresponding to each insulating sealing member and the gap between the corresponding positive post 21 or the corresponding negative post 23. Through setting up a plurality of insulating seal spare, can realize insulating and sealed between every positive post 21 and every negative pole post 23 and the radiation shield 41 simultaneously to prevent positive post 21 and negative pole post 23 and radiation shield 41 contact and short circuit, and still can prevent that outside steam from entering into in the radiation shield 41 and leading to the electric leakage.

Preferably, the insulating seal is a graphite member or a mica member (more resistant to high temperatures). The graphite member or the mica member has excellent high temperature resistance, and thus can be prevented from being melted by itself. Therefore, the insulating seal member has a better sealing performance.

The electric heater 1 includes at least two heating members 20, and all the heating portions 25 of all the heating members 20 share the same spiral center line. Since the electric heater 1 has at least two heating members 20, the heat transfer efficiency of the electric heater 1 can be effectively improved. In addition, since all the heat generating portions 25 share the same spiral center line, the layout structure between all the heating members 20 can be made more compact. Thus, the electric heater 1 provided in the present application has both a high heat transfer efficiency and a small volume.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An electric heater, characterized in that it comprises:

a supporting base; and

the heating device comprises at least two heating elements which are arranged at intervals, each heating element comprises a positive pole column, a negative pole column and a heating part, each positive pole column and each negative pole column are assembled on a supporting seat, and two opposite ends of each heating part are respectively connected with the positive pole column and the negative pole column in the same heating element;

each heating part is of a spiral line structure extending along a first direction, and all the heating parts share the same spiral central line.

2. The electric heater of claim 1, wherein the spiral radii of all of the heat generating portions are the same.

3. The electric heater of claim 1, wherein the support base has a first side, the heat generating portion being located on the first side;

the electric heater also comprises a heat conducting part positioned on the first side, wherein the heat conducting part comprises a heat conducting pipe and a heat conducting medium, the heat conducting pipe is sleeved outside all the heating parts, and the heat conducting medium is filled in a gap between each heating part and the heat conducting pipe.

4. The electric heater of claim 3, wherein the heat transfer medium is a heat transfer powder.

5. An electric heater according to claim 3, wherein the heat conducting tube is a silicon nitride ceramic tube or a sialon ceramic tube.

6. The electric heater of claim 3, further comprising a thermal insulator coupled between the thermal conductor and the support base for insulating heat transfer between the thermal conductor and the support base.

7. The electric heater of claim 6, wherein said support base further has a second side spaced apart from and opposite said first side in a first direction, each of said positive posts and each of said negative posts extending through said first side and said second side in said first direction;

the heat insulation piece comprises a heat insulation sleeve and heat insulation media, the heat insulation sleeve is connected to the supporting seat in a matched mode, the first direction penetrates through the first side and the second side, each positive pole and each negative pole are located outside the heat conduction pipe, the portions of the negative pole and the heat conduction pipe penetrate through the heat insulation sleeve, the heat insulation media are filled in each positive pole and the heat insulation sleeve, and each negative pole and a gap between the heat insulation sleeves.

8. The electric heater of claim 7, wherein the insulating sleeve is a metal sleeve.

9. The electric heater of claim 7, wherein the heat insulating sleeve is a hollow structure with one open end and one closed end, the open end of the heat insulating sleeve protruding from the first side is in sealing contact with the heat conducting pipe, and the closed end of the heat insulating sleeve protrudes from the second side;

the supporting seat further comprises insulating sealing pieces, each positive pole and each negative pole are all arranged in a penetrating mode at the opening end and the closed end of the heat insulation sleeve, each positive pole and each negative pole are all in close fit with the closed end of the heat insulation sleeve through the corresponding insulating sealing pieces.

10. The electric heater of claim 9, wherein the insulating seal is a graphite member or a mica member.

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