CN216795302U

CN216795302U - Novel heating body

Info

Publication number: CN216795302U
Application number: CN202122829123.4U
Authority: CN
Inventors: 颜发广; 任建辉; 韦红; 罗敏
Original assignee: ZHONGSHAN CTR HOUSEHOLD TECHNOLOGY Ltd
Current assignee: ZHONGSHAN CTR HOUSEHOLD TECHNOLOGY Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-06-21
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a novel heating element, which comprises a plastic shell and a ceramic block, wherein the ceramic block is arranged in the plastic shell, a flexible PCBA (printed Circuit Board Assembly) plate is arranged between the ceramic block and the plastic shell, a plurality of heating resistors are uniformly distributed on the flexible PCBA plate along the circumference of the flexible PCBA plate, the flexible PCBA plate is used as a heat-conducting carrier of a heating element of a heater, the surrounding assembly requirements of various shapes can be realized, meanwhile, heat can be uniformly radiated around the center of the heating element, and the requirements of different radiation temperatures and heating time can be realized by adjusting the number of small patch heating resistors and the distribution positions of the PCBA plate; moreover, the flexible PCBA board is used as a heat-conducting carrier of the heating element of the heater, so that the mode of filling sealing materials in the cavity of the heating element to wrap the resistor is completely avoided, and the traditional process of high-temperature drying is also avoided; the heating body needing to be welded and sealed also avoids the special process of ultrasonic welding, and the product competitiveness is improved under the condition of ensuring the product safety by simplifying the assembly process.

Description

Novel heating body

Technical Field

The utility model relates to the field of electric heaters, in particular to a novel heating body.

Background

As shown in fig. 5, the heating resistor 40 is used as a heating source, the heating resistor 40 is placed in a groove on the ceramic block 20, the groove is filled with a sealing filler 999, and then the groove is baked at a high temperature to dry the filler, so that the ceramic block and the heating resistor are finally condensed, wrapped and fixed. The heating element has higher requirements on the operation process, such as: the grain size, the heat conducting property, the electrical insulating property and the distribution of the filler have higher requirements; the filler needs to be placed for a long time before solidification to naturally evaporate water, and then the drying process of the filler needs to be carried out under the high-temperature condition (150 ℃), the process time is long, the required heat energy consumption is high, and the operation requirement is relatively complex.

As shown in fig. 6, a PTC thermistor 888 is used as a heating source, the PTC thermistor, an annular aluminum electrode 777 and a metal spring sheet are tightly pressed on a plastic base 666, and then another plastic upper cover is used for ultrasonic welding and sealing, so as to finally realize a complete heater heating element assembly. Compared with the heating body structure shown in the figure 1, the heating body structure is relatively simple, convenient and quick to manufacture and produce, but the heating body structure requires higher matching precision of all parts, needs production equipment and detection equipment with more investment costs, and is difficult to realize automatic production. Secondly, for the heating element with the structure, because each part has size deviation, the matching tightness is not good enough, the temperature deviation of the heating element radiating to the periphery of the core rod hole is large, and the using effect of the product is influenced.

By combining the two heater structures, although basic requirements on safety and functions can be realized on electric heater products, heating source individuals cannot be uniformly distributed around the core rod hole, so that uneven temperature heat radiation around a heating carrier is caused, and the heat balance time is longer; meanwhile, the heating body has the disadvantages of complex manufacturing process requirements, low production efficiency, high detection level requirements and high production cost, and the realization of high-level automatic production has a bottleneck.

Therefore, a novel heating body which can uniformly generate heat and has low production cost is urgently needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a novel heating body which is uniform in heating and low in production cost.

The novel heating body designed according to the purpose comprises a plastic shell and ceramic blocks, wherein the ceramic blocks are arranged in the plastic shell, flexible PCBA boards are arranged between the ceramic blocks and the plastic shell, and a plurality of heating resistors are uniformly distributed on the flexible PCBA boards along the circumference of the flexible PCBA boards.

Preferably, the lower end of the plastic shell is open, the upper end of the plastic shell is provided with a through hole, the ceramic block consists of an annular sealing part and an annular supporting part arranged on the upper end face of the annular sealing part, and the flexible PCBA plate is coated on the lower end face of the annular supporting part.

Preferably, a plurality of ribs are uniformly distributed on the inner wall of the plastic shell along the circumference of the plastic shell.

Preferably, the inner wall of the flexible PCBA board is attached to the outer wall of the annular supporting part, the outer wall of the flexible PCBA board is attached to the convex ribs, and the heating resistor is arranged between the two convex ribs.

Preferably, the ring-type seal portion is detachably connected to the plastic housing.

Preferably, a wire groove for facilitating the wiring of the flexible PCBA board is arranged on the side wall of the annular sealing part.

Compared with the prior art, the utility model has the following advantages:

1. the flexible PCBA board is used as a heat-conducting carrier of the heater heating body, so that the surrounding type assembly requirements of various shapes can be met, and heat can be uniformly radiated around the center of the heating body;

2. the small patch type heating resistor is adopted, so that the small patch type heating resistor is welded on the flexible PCBA board in a clinging manner, is not easy to loosen, fully transfers heat around the PCBA board, and has high heat conduction efficiency;

3. the utility model can realize the requirements of different radiation temperatures and the heating time by adjusting the number of the small patch heating resistors and the distribution positions of the small patch heating resistors on the PCBA board;

4. according to the utility model, the flexible PCBA board is used as a heat-conducting carrier of the heating element of the heater, so that a mode of filling sealing materials in the cavity of the heating element to wrap the resistor is completely avoided, and the traditional process of high-temperature drying is also avoided; the heating body needing to be welded and sealed also avoids the special process of ultrasonic welding, and the assembly process is simplified, so that the product has better cost competitiveness under the condition of ensuring the product safety.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a second exploded view of the present invention;

FIG. 4 is a third exploded view of the present invention;

FIG. 5 is a schematic view of a prior art;

FIG. 6 is a second schematic diagram of the prior art;

fig. 7 is a schematic view of a use state.

Detailed Description

The utility model is further described with reference to the following figures and examples.

Referring to fig. 1-4, a novel heating element comprises a plastic casing 10 and a ceramic block 20, wherein the ceramic block 20 is arranged in the plastic casing 10, a flexible PCBA plate 30 is arranged between the ceramic block 20 and the plastic casing 10, and a plurality of heating resistors 40 are uniformly distributed on the flexible PCBA plate 30 along the circumference thereof.

The flexible PCBA board is used as a heat-conducting carrier of the heater heating body, so that the surrounding type assembly requirements of various shapes can be met, and heat can be uniformly radiated around the center of the heating body;

the heating resistor 40 adopts a small patch type heating resistor, is tightly attached to and welded on the flexible PCBA board, is not easy to loosen, fully transfers heat around the PCBA board, and has high heat conduction efficiency;

furthermore, the requirements of different radiation temperatures and the heating time can be realized by adjusting the number of the small patch heating resistors and the distribution positions of the small patch heating resistors on the PCBA board;

moreover, the flexible PCBA board is used as a heat-conducting carrier of the heating element of the heater, so that the mode of filling sealing materials in the cavity of the heating element to wrap the resistor is completely avoided, and the traditional process of high-temperature drying is also avoided; the heating body needing to be welded and sealed also avoids the special process of ultrasonic welding, and the assembly process is simplified, so that the product has better cost competitiveness under the condition of ensuring the product safety.

Referring to fig. 2 and 3, specifically, the lower end of the plastic housing 10 is open and the upper end thereof is provided with a through hole 100, the ceramic block 20 is composed of a ring-shaped sealing portion 220 and a ring-shaped supporting portion 230 disposed on the upper end surface of the ring-shaped sealing portion 220, the flexible PCBA board 30 is wrapped on the lower end surface of the ring-shaped supporting portion 230, and the inner wall of the plastic housing 10 is uniformly provided with a plurality of ribs 110 along the circumference thereof.

By providing the ribs 110, that is, by providing an installation space between every two ribs 110, when the flexible PCBA board 30 is wrapped on the annular bearing portion 230, the heating resistors 40 located on the flexible PCBA board 30 are located in the installation space, and further, the ribs 110 are used for pressing against the outer wall of the flexible PCBA board 30, so that the flexible PCBA board is tightly attached to the annular bearing portion 230.

The inner wall of the flexible PCBA board 30 is attached to the outer wall of the annular support portion 230, the outer wall thereof is attached to the ribs 110, and the heating resistor 40 is disposed between the two ribs 110.

The ring-shaped sealing portion 220 is detachably connected to the plastic housing 10, and can be detachably connected to an existing connection means, such as a screw connection, a snap connection, and the like.

The side wall of the ring-shaped sealing part 220 is provided with a wire groove 210 for facilitating the wiring of the flexible PCBA board 30, and an external circuit can be connected with the flexible PCBA board 30 conveniently by arranging the wire groove 210.

Referring to fig. 7, when in use, the mandrel 1000 is inserted into the annular sealing portion 220 and the annular supporting portion 230 in sequence, at this time, the flexible PCBA plate 30 and the heating resistor 40 can realize heating of the annular region, so as to ensure the heating balance of the mandrel, and meanwhile, the flexible PCBA plate is tightly attached to the annular supporting portion 230, so that the heat loss can be reduced, and the heat transfer can be improved.

In the description of the present invention, 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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for the convenience of description and simplicity of description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model, the terms "first" and "second" 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.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel heat-generating body, including plastic casing (10) and ceramic block (20), its characterized in that: ceramic block (20) set up in plastic casing (10) ceramic block (20) with be equipped with flexible PCBA board (30) between plastic casing (10), have a plurality of heating resistor (40) along its circumference equipartition on flexible PCBA board (30).

2. A novel heat-generating body as described in claim 1, characterized in that: the ceramic block is characterized in that the lower end of the plastic shell (10) is provided with an opening, the upper end of the plastic shell is provided with a through hole (100), the ceramic block (20) is composed of an annular sealing part (220) and an annular bearing part (230) arranged on the upper end face of the annular sealing part (220), and the flexible PCBA board (30) is coated on the lower end face of the annular bearing part (230).

3. A novel heat-generating body as described in claim 2, characterized in that: a plurality of convex ribs (110) are uniformly distributed on the inner wall of the plastic shell (10) along the circumference.

4. A novel heat-generating body as described in claim 3, characterized in that: the inner wall of flexible PCBA board (30) with the outer wall laminating of annular supporting part (230), its outer wall with protruding muscle (110) laminating, heating resistor (40) set up between two protruding muscle (110).

5. A novel heat-generating body as described in any one of claims 2 to 4, characterized in that: the annular sealing part (220) is detachably connected with the plastic shell (10).

6. A novel heat-generating body as described in any one of claims 2 to 4, characterized in that: and a wire groove (210) convenient for the wiring of the flexible PCBA board (30) is arranged on the side wall of the annular sealing part (220).