CN215647425U - Double-layer leakage protection heater - Google Patents

Abstract

The utility model discloses a double-layer leakage protection heater, which relates to the field of heaters and comprises at least one insulating heating structure, an inner heat-conducting metal shell, an outer insulating protection structure and a lead, wherein the inner heat-conducting metal shell is arranged on the outer side of the insulating heating structure and is hermetically connected with the insulating heating structure; the insulating heating structure comprises a heating core, a metal heat conduction conducting strip arranged on the outer layer of the heating core and electrically connected with the heating core, and a first insulating layer arranged on the outer layer of the metal heat conduction conducting strip and hermetically connected with the metal heat conduction conducting strip, wherein the metal heat conduction conducting strip is electrically connected with a wire; the outer layer insulation protection structure comprises a second insulation layer and an outer layer heat conduction metal shell, wherein the second insulation layer is arranged on the outer layer of the inner layer heat conduction metal shell and is hermetically connected with the inner layer heat conduction metal shell, and the outer layer heat conduction metal shell is arranged on the outer layer of the second insulation layer and is hermetically connected with the second insulation layer.

Description

Double-layer leakage protection heater

Technical Field

The utility model relates to the technical field of heaters, in particular to a double-layer leakage protection heater.

Background

For a conventional heater, a conductive metal sheet is generally disposed outside a heating core, the conductive metal sheet is electrically connected to the outside, and an external current is electrically connected to the heating core through the conductive metal sheet, so that the heating core generates heat. Then, an insulating layer is arranged on the outer sides of the heating core and the conductive metal sheet to prevent the internal heating core and the conductive metal sheet from electric leakage, and then a metal shell is arranged on the outer side of the insulating layer to protect the insulating layer. However, if the built-in heating element is burnt out, or the insulating layer is pierced by a sharp object, the insulating layer leaks electricity, so that the metal shell is electrified, the safety coefficient is not high, and the threat of personal accidents can be brought to an operator.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a double-layer leakage protection heater, which solves the technical problems that the heater in the prior art is easy to leak electricity and low in safety coefficient.

In order to achieve the above object, the present invention provides a double-layer leakage protection heater, which comprises at least one insulating heating structure, an inner heat-conducting metal shell disposed outside the insulating heating structure and hermetically connected to the inner heat-conducting metal shell, an outer insulating protection structure disposed outside the inner heat-conducting metal shell and hermetically connected to the outer heat-conducting metal shell, and a conductive wire; the insulating heating structure comprises a heating core, a metal heat conduction conducting strip arranged on the outer layer of the heating core and electrically connected with the heating core, and a first insulating layer arranged on the outer layer of the metal heat conduction conducting strip and hermetically connected with the metal heat conduction conducting strip, wherein the metal heat conduction conducting strip is electrically connected with a wire; the outer layer insulation protection structure comprises a second layer insulation layer and an outer layer heat conduction metal shell, wherein the second layer insulation layer is arranged on the outer layer of the inner layer heat conduction metal shell and is connected in a sealing mode, and the outer layer heat conduction metal shell is arranged on the outer layer of the second layer insulation layer and is connected in a sealing mode.

In the above technical solution, the number of the insulating heating structures is 2.

In the above technical scheme, at least one accommodating groove for accommodating the insulating heating structure is arranged on the inner heat-conducting metal shell.

In the above technical scheme, the heating core is a PTC ceramic member.

In the above technical scheme, the inner heat-conducting metal shell is an aluminum component.

In the above technical scheme, the outer heat conduction metal shell is a stainless steel component or an aluminum component.

In the above technical scheme, the metal heat conduction and conduction sheet is a brass member, an aluminum member or a red copper member.

In the above technical solution, the first insulating layer is a polyimide member or a silica gel member.

In the above technical solution, the second insulating layer is a polyimide member or a silica gel member.

Compared with the prior art, the utility model has the beneficial effects that:

when the heater adopting the technical scheme is used, an external power supply is electrically connected with the metal heat conduction conducting strip through the wire, the metal heat conduction conducting strip transmits current to the heating core, and the heating core is heated at the moment. If the heating core burns out under high voltage, thereby leading to the condition that the first insulating layer burns out, the insulating protection of first insulating layer can be lost to the inlayer heat conduction metal casing, thereby electrified. However, the inner heat-conducting metal shell cannot be burnt out, and at the moment, the second insulating layer enables the inner heat-conducting metal shell and the outer heat-conducting metal shell to be insulated, so that the outer heat-conducting metal shell cannot be electrified, and the safety coefficient of the heater of the embodiment is greatly improved. Constitute duplicate protection to the heating core between first layer insulating layer, inlayer heat conduction metal-back and the second floor insulating layer to ensure when the heating core is struck sparks or burns out or first layer insulating layer is impaled by sharp object, outer heat conduction metal-back can not electrified, has strengthened the factor of safety of the heater of this embodiment greatly. The heater of the technical scheme can be used for heating gas, liquid and solid, is suitable for occasions with higher safety requirements, and has the advantage of wide application. The problem of among the prior art heater electric leakage easily, factor of safety is low is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a double-layered earth leakage protection heater provided by the present invention;

FIG. 2 is a cross-sectional view of a dual layer earth leakage protected heater provided by the present invention at another angle;

fig. 3 is a cross-sectional view of another dual layer earth leakage protected heater provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the present embodiment provides a dual-layer earth leakage protection heater, which includes at least one insulating heating structure 1, an inner heat-conducting metal shell 2, an outer insulating protection structure 3, and a conducting wire 4.

The insulating heating structure 1 comprises a heating core 11, a metallic heat conducting and conducting strip 12 and a first insulating layer 13. The metal heat conduction and conduction sheet 12 is arranged on the outer layer of the heating core 11 and is electrically connected with the heating core 11. The first insulating layer 13 is disposed on the outer layer of the metal heat and electric conduction sheet 12 and wraps the metal heat and electric conduction sheet 12 and the heating core 11, so that the metal heat and electric conduction sheet 12 and the heating core 11 are insulated from the outside. The metal conductive and heat conducting sheet 12 is electrically connected to the wire 4. The inner layer heat-conducting metal shell 2 is arranged on the outer side of the first insulating layer 13 and wraps the first insulating layer 13, so that the first insulating layer 13 is prevented from being punctured by the outside and electric leakage is avoided. Wherein the present embodiment is preferably provided with two insulated heating structures 1. The two insulating heating structures 1 can increase the heating rate of the heater of this embodiment, and in other embodiments, the number of the insulating heating structures 1 may also be 3 or 4, so the disclosure is not limited thereto. The inner heat conducting metal shell 2 of the present embodiment is preferably provided with accommodating grooves (not shown in the figure) for accommodating the insulating heating structures 1, wherein the number of the accommodating grooves preferably corresponds to the number of the insulating heating structures 1. Specifically, when the heating core 11 in one of the insulating heating structures 1 is burned to cause the first insulating layer 13 to be burned and leak electricity, the first insulating layer 13 in the other insulating heating structure 1 will not be burned under the protection of the inner heat-conducting metal shell 2, so as to protect the heating core 11 in the other insulating heating structure 1. The outer insulating and protecting structure 3 comprises a second insulating layer 31 and an outer heat conducting metal shell 32. The second layer of insulating layer 31 sets up at the outer layer of inner layer heat conduction metal-back 2 and is used for making inner layer heat conduction metal-back 2 and external insulation, and outer layer heat conduction metal-back 32 sets up at second layer of insulating layer 31 skin, and mainly used protection second layer of insulating layer 31 is not destroyed by the external world.

Specifically, an external power source is electrically connected to the metal conductive and heat conductive sheet 12 through the wire 4, and the metal conductive and heat conductive sheet 12 transmits current to the heating core 11, so that the heating core 11 is heated. The heating core 11 is preferably made of PTC ceramic material, the PTC ceramic heating core 11 is a heating element with high safety and automatic constant temperature, and the use voltage of the PTC ceramic heating core 11 can be selected from 36V-1000V as a heating source; the constant temperature of the PTC ceramic heating core 11 can be selected from-20 ℃ to 350 ℃, and can meet most heating requirements. The metal heat conducting and conducting sheet 12 mainly functions to conduct electricity and heat, and is preferably a brass member, and may also be an electric and heat conducting material such as an aluminum sheet, a stainless steel sheet, a copper sheet, and the like, so that the utility model is not limited thereto. The first insulating layer 13 will serve to insulate the metallic, thermally conductive, electrically conductive sheet 12 and the heating core 11 from the outside. The first insulating layer 13 is preferably a glass member, and may also be other organic insulating materials, such as a polyimide film, a PET film, a silicone film, and the like; or inorganic insulating materials such as alumina ceramic sheets, glass sheets, mica sheets, etc., so the utility model is not limited thereto. The inner heat-conducting metal shell 2 is mainly used for protecting the first insulating layer 13 from being punctured by the outside and transferring heat transferred by the metal heat-conducting and conducting strip 12, and the inner heat-conducting metal shell 2 is preferably an aluminum component and can also be made of other materials with good heat-conducting property, such as aluminum, red copper, brass, stainless steel and the like.

A second insulating layer 31 is provided outside the inner thermally conductive metal shell 2. In the event that the heater core 11 burns out under high voltage, thereby causing the first insulating layer 13 to burn out, the inner heat conductive metal shell 31 may lose the insulation protection of the first insulating layer 13, thereby being electrified. However, the inner heat-conducting metal shell 2 cannot be burnt out, and at the moment, the second insulating layer 31 enables the inner heat-conducting metal shell 2 and the outer heat-conducting metal shell 32 to be insulated from each other, so that the outer heat-conducting metal shell 32 cannot be electrified, and the safety coefficient of the heater in the embodiment is greatly improved. The second insulating layer 31 is preferably an alumina ceramic member, and may also be other organic insulating materials, such as a polyimide film, a PET film, a silicone film, and the like; or inorganic insulating materials such as alumina ceramic sheets, glass sheets, mica sheets, etc. The outer heat-conductive metal shell 32 is mainly used for heat conduction and for preventing the second insulating layer 31 from being damaged by external force, and is preferably made of stainless steel, or other materials such as aluminum, copper, brass, and stainless steel.

The double protection is formed among the first insulating layer 13, the inner heat-conducting metal shell 2 and the second insulating layer 31 for the heating core 11 in the embodiment, so that the outer heat-conducting metal shell 32 can not be electrified when the heating core 11 is ignited or burnt or the first insulating layer 13 is pierced by a sharp object, and the safety factor of the heater in the embodiment is greatly enhanced. The heater of the embodiment can be used for heating gas, liquid and solid, is suitable for occasions with higher safety requirements, and has the advantage of wide application.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (9)

1. The double-layer leakage protection heater is characterized by comprising at least one insulating heating structure (1), an inner-layer heat-conducting metal shell (2) which is arranged on the outer side of the insulating heating structure (1) and is hermetically connected, an outer-layer insulating protection structure (3) which is arranged on the outer side of the inner-layer heat-conducting metal shell (2) and is hermetically connected, and a lead (4);

the insulating heating structure (1) comprises a heating core (11), a metal heat conduction and conduction sheet (12) which is arranged on the outer layer of the heating core (11) and is electrically connected with the heating core (11), and a first insulating layer (13) which is arranged on the outer layer of the metal heat conduction and conduction sheet (12) and is hermetically connected, wherein the metal heat conduction and conduction sheet (12) is electrically connected with a wire (4);

the outer layer insulation protection structure (3) comprises a second layer insulation layer (31) which is arranged on the outer layer of the inner layer heat conduction metal shell (2) and is hermetically connected with the outer layer insulation layer, and an outer layer heat conduction metal shell (32) which is arranged on the outer layer of the second layer insulation layer (31) and is hermetically connected with the outer layer insulation layer.

2. A double layer earth leakage protected heater according to claim 1, wherein the number of said insulating heating structures (1) is 2.

3. A double-layer earth leakage protected heater according to any of claims 1-2, wherein at least one receiving groove for receiving the insulating heating structure (1) is provided on the inner heat conducting metal shell (2).

4. A double layer earth leakage protected heater as claimed in claim 1, wherein said heater core (11) is a PTC ceramic member.

5. A double layer earth leakage protected heater according to claim 1, wherein said inner heat conducting metal shell (2) is an aluminium member.

6. A double layer earth leakage protected heater as claimed in claim 1, wherein said outer thermally conductive metal shell (32) is a stainless steel or aluminium member.

7. A double layer earth leakage protected heater as claimed in claim 1, wherein said conductive metal sheet (12) is a brass member or an aluminum member or a copper member.

8. A dual layer earth leakage protected heater as claimed in claim 1, wherein said first insulating layer (13) is a polyimide or silicone member.

9. A dual layer earth leakage protected heater as claimed in claim 1, wherein said second insulating layer (31) is a polyimide or silicone member.

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