CN115720891B

CN115720891B - Assembled heating element and electric mosquito repellent

Info

Publication number: CN115720891B
Application number: CN202211649493.2A
Authority: CN
Inventors: 李翔; 厉庆慧
Original assignee: Wenzhou Daou Electrical Co ltd
Current assignee: Wenzhou Daou Electrical Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-08-01
Anticipated expiration: 2042-12-21
Also published as: CN115720891A

Abstract

The invention discloses an assembled heating element and an electrothermal mosquito-repellent incense device, which comprises a bipod, a ceramic body arranged on the bipod, an aluminum pipe arranged on a heating cavity, and further comprises: the mounting cavity is arranged on the bipod, and the top end of the mounting cavity faces the ceramic body; the elastic lower pole piece is arranged at the bottom of the mounting cavity and is provided with a first wiring pin which is formed by extending outwards; the PTC thermistor is abutted against the upper end of the elastic pole piece; the upper pole piece is abutted to the upper end of the PTC thermistor, the top end of the upper pole piece is abutted to the ceramic body, and the upper pole piece is provided with a second wiring pin which is formed by extending outwards. The dual-metal-sheet ceramic battery also comprises two dual-metal sheets, wherein the two dual-metal sheets are symmetrically arranged on two sides of the ceramic body, the mounting ends of the dual-metal sheets are contacted with the PTC thermistor, and when the dual-metal sheets are electrified and heated, the movable ends of the dual-metal sheets are bent and are embraced on the cambered surface of the ceramic body. The assembled heating body of this application installs more simply high-efficient, and the temperature control in chamber that generates heat is more even, and the waste heat loss is faster after the use is accomplished simultaneously.

Description

Assembled heating element and electric mosquito repellent

Technical Field

The invention relates to the technical field of electric mosquito repellent incense devices, in particular to an assembled heating body and an electric mosquito repellent incense device, wherein the assembled heating body can be applied to various liquid volatilizers such as the electric mosquito repellent incense device, an electric perfume volatilizer and the like.

Background

At present, the traditional heating body of the electric mosquito repellent heater mostly adopts a ceramic glue filling process, and the main process is that two wires are welded on two poles of a Positive Temperature Coefficient (PTC), then a proper amount of glue is filled into the ceramic, the welded PTC is plugged into the ceramic, then a semi-finished product is put into a baking oven for baking, and the baked ceramic is riveted with a plastic bipod and an aluminum tube, so that a heating body finished product is manufactured.

As can be seen from the conventional heating element process of the electric mosquito repellent, the whole process is complicated, the procedures are more, and the temperature consistency of the heating element is the most important technical parameter for the heating element of the electric mosquito repellent. The temperature consistency of the traditional heating element depends on factors such as temperature error of the PTC, the formula of glue, a drying process and the like, so that the temperature consistency of the traditional heating element is relatively difficult to control, and a required temperature range is generally selected through subsequent temperature measurement.

Therefore, how to provide an assembled heating element and an electrothermal mosquito-repellent incense device, which improve the convenience of installation and the uniformity of heating, is a technical problem to be solved by the technicians in the field.

Disclosure of Invention

Therefore, the invention provides an assembled heating element and an electrothermal mosquito-repellent incense device, which are used for solving the related technical problems in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

according to a first aspect of the present invention, there is provided an assembled heating element, including a bipod and a ceramic body mounted on the bipod, the ceramic body and the bipod are correspondingly provided with heating chambers, and further including:

the mounting cavity is arranged on the bipod, and the top end of the mounting cavity faces the ceramic body;

an elastic lower pole piece which is arranged at the bottom in the mounting cavity and is provided with a first wiring pin which is formed by extending outwards;

the PTC thermistor is abutted against the upper end of the elastic pole piece;

the upper pole piece is abutted to the upper end of the PTC thermistor, the top end of the upper pole piece is abutted to the ceramic body, and the upper pole piece is provided with a second connecting pin which is formed by extending outwards.

Further, the elastic lower pole piece comprises elastic pieces extending towards the front-back direction and bending downwards, an elastic cavity is formed between the two elastic pieces, and the elastic pieces elastically abut against the bottom in the installation cavity.

Further, the heating chamber further comprises an aluminum pipe, and the aluminum pipe is sleeved and riveted in the heating chamber.

Further, the ceramic body is provided with a PTC thermistor, the PTC thermistor is provided with a mounting end, a movable end of the bimetal is bent and held on the cambered surface of the ceramic body when the PTC thermistor is electrified and heated, and the bimetal is arranged on the ceramic body.

Further, the bimetal comprises a passive layer, an active layer and a connecting part, wherein the inner side of the passive layer is in contact with the ceramic body, the active layer is fixed on the outer side of the passive layer, the connecting part is in contact with the PTC thermistor, and the connecting part is arranged at the mounting end of the bimetal.

Further, the connecting part comprises a vertical plate and a transverse plate, the outer end of the vertical plate is connected with one end of the passive layer, and the transverse plate is vertically fixed on the vertical plate;

the inner end face of the vertical plate is in contact with the PTC thermistor, the outer end face of the vertical plate is in contact with the inner side wall of the installation cavity, and the transverse plate is inserted into the elastic cavity.

Further, the solar cell module further comprises an outlet, wherein the outlet is symmetrically arranged on the left side and the right side of the mounting cavity, and the passive layer is led out from the outlet.

Further, the PTC thermistor comprises an abutting radiating fin, wherein the abutting radiating fin is arranged on the front side of the ceramic body, and when the PTC thermistor does not generate heat, the movable end of the bimetallic strip stretches and contacts the abutting radiating fin.

Further, the abutting radiating fin comprises an arc-shaped mounting fin and a radiating metal fin fixed on the inner side of the arc-shaped mounting fin.

According to a second aspect of the present invention, there is provided an electrothermal mosquito-repellent incense device comprising the assembled heating element as described above, further comprising:

the assembled heating body is fixed on the base;

the surface cover is arranged on the base and is clamped and fixed with the base;

the integrated switch is arranged at the front end of the base, a button is arranged on the integrated switch, and the integrated switch is electrically connected with the assembled heating body through a wire;

the plug seat assembly is arranged at the rear end of the base and is electrically connected with the integrated switch through a wire.

The invention has the following advantages:

compared with the traditional heating element, the novel assembled heating element has relatively simple installation process, only the PTC thermistor and the two pole pieces are installed in the bipod, the whole bipod is buckled with the ceramic body, the bipod is riveted with the ceramic body through the aluminum pipe, meanwhile, wires can be connected in a riveting mode, a plugging mode, a spot welding mode and the like, and the whole process is automatically assembled at one time by adopting automatic equipment, so that the installation convenience and the machining efficiency are greatly improved. Meanwhile, the bimetal is creatively added, and heat generated when the PTC thermistor heats is transferred to the far-end cambered surface of the ceramic body, so that the consistency of temperature control can be greatly improved. And the butt radiating fin is arranged, so that after the ceramic body is used, the ceramic body can be abutted with the bimetal strip through the extension of the bimetal strip, thereby facilitating the heat transfer on the ceramic body and accelerating the waste heat dissipation.

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 described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic diagram of an assembled heating element according to embodiment 1 of the present invention;

FIG. 2 is an exploded view of the assembled heat-generating body of FIG. 1 provided in example 1 of the present invention;

fig. 3 is a schematic structural diagram of an elastic lower pole piece according to embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of an assembled heat generating body according to embodiment 2 of the present invention;

FIG. 5 is an exploded view of the assembled heat-generating body of FIG. 4 provided in example 2 of the present invention;

fig. 6 is a schematic diagram of a bimetal structure according to embodiment 3 of the present invention;

fig. 7 is a schematic diagram of a mounting structure of a bimetal and an abutting heat sink according to embodiment 4 of the present invention;

fig. 8 is a schematic diagram of an electrothermal mosquito-repellent incense burner according to embodiment 5 of the present invention;

fig. 9 is a schematic diagram illustrating disassembly of an electrothermal mosquito-repellent incense burner according to embodiment 5 of the present invention;

in the figure:

1, two foot frames; 2, ceramic body; 3, a heating cavity; 4, installing a cavity; 5, elastic lower pole piece; 501 first pins; 502 elastic sheet; 503 elastic cavity; 6PTC thermistor; 7, pole pieces are arranged on the pole pieces; 701 second pins; 8 aluminum tubes; 9, bimetallic strips; 901 a passive layer; 902 an active layer; 903 connection; 9031 risers; 9032 transverse plates; 10 an outlet; 11 abutting against the radiating fin; 111 arc mounting pieces; 112 heat dissipating metal sheets; 12 bases; 13 face covers; 14 an integrated switch; 15 buttons; 16 connector assembly.

Detailed Description

Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

In order to solve the problems of complicated installation procedures of the heating element and poor control of heating uniformity of the heating cavity 3 in the prior art, according to a first aspect of the invention, an assembled heating element is provided, which is an improvement on the basis of the heating element in the prior art, and specifically comprises a tripod 1 and a ceramic body 2 installed on the tripod 1, the ceramic body 2 and the tripod 1 are correspondingly provided with the heating cavity 3, and the ceramic body 2 is installed and fixed on the tripod 1 in a clamping, sticking and other modes. When the mosquito-repellent incense burner is applied to an electric mosquito-repellent incense burner, mosquito-repellent incense liquid can be heated to promote volatilization, and the mosquito-repellent and mosquito-killing effects are realized. In order to realize more convenient processing, the heating structure is improved, as shown in fig. 1-2, and the method specifically further comprises the following steps:

the installation cavity 4 is arranged on the tripod 1, the top end of the installation cavity faces the ceramic body 2, and the installation cavity 4 is used for containing the elastic lower pole piece 5, the PTC thermistor 6 and the upper pole piece 7. The elastic lower pole piece 5 is arranged at the bottom in the mounting cavity 4 and is provided with a first wiring pin 501 which is formed by extending outwards; the PTC thermistor 6 is abutted against the upper end of the elastic pole piece; the upper pole piece 7 is abutted to the upper end of the PTC thermistor 6, the top end of the upper pole piece 7 is abutted to the ceramic body 2, and the upper pole piece 7 is provided with a second wiring pin 701 which is formed by extending outwards.

Through the structure, the elastic lower pole piece 5 is in close contact with the PTC thermistor 6, the upper pole piece 7 and the ceramic body 2 through the elastic action, so that the electrifying effect and the heating effect of the ceramic body 2 are ensured. Specifically, the installation cavity 4 can conveniently install the PTC thermistor 6 in the installation cavity 4, and the first terminal pin 501 and the second terminal pin 701 are energized through the wires, so that the PTC thermistor 6 generates heat. The key design principle of the novel assembled heating body is that an electrode plane of a PTC thermistor 6 is completely attached to an upper pole piece 7, the upper pole piece 7 is completely attached to the surface of a ceramic body 2, and an elastic lower pole piece 5 is used for supporting the other electrode of the PTC thermistor 6, so that the PTC thermistor 6 is completely attached to the upper pole piece 7, the upper pole piece 7 is completely attached to the ceramic body 2 (the vertical surface of the PTC thermistor 6 can be contacted with or not contacted with the vertical surface of the ceramic body 2), heat of the PTC thermistor 6 is mainly transferred to the ceramic body 2 through the upper pole piece 7, and only the PTC thermistor 6, the upper pole piece 7 and the ceramic body 2 are completely attached, so that the temperature consistency of the heating body can be ensured.

Meanwhile, compared with the traditional electric mosquito repellent heater, the novel assembled heater has the advantages that the manufacturing process is simpler, the control points are fewer, the stability consistency and stability of the heater can be improved, compared with the traditional electric mosquito repellent heater, the novel assembled heater does not have high-energy consumption equipment such as an automatic PTC wire welding machine and an oven, the corresponding manufacturing cost is reduced, and the production operation is simplified.

In this embodiment, as shown in fig. 2-3, the elastic lower pole piece 5 includes an elastic piece 502 extending in the front-rear direction and bending downward, an elastic cavity 503 is formed between the two elastic pieces 502, and the elastic piece 502 elastically abuts against the bottom of the mounting cavity 4, so that when the mounting cavity 4 is a certain space, the elastic force of the elastic piece 502 can always ensure close contact with the PTC thermistor 6 and the pole piece.

Example 2

In order to facilitate the installation of the bipod 1 and the ceramic body 2 and further improve the temperature consistency of the heating cavity 3, the heating device further comprises an aluminum pipe 8, as shown in fig. 4-5, and the aluminum pipe 8 is sleeved and riveted in the heating cavity 3. The bipod 1 and the ceramic body 2 are riveted through the aluminum pipe 8 (when the aluminum pipe 8 is removed, the heating function of the heating body can be performed, and the heat conduction is not consistent with the temperature under the condition of the aluminum pipe 8, so that the optimal scheme is that the temperature of the heating body can be conducted better under the condition of the aluminum pipe 8), so that the whole heating body is more stable and reliable.

Example 3

Based on the above embodiments 1 and 2, in particular use, in order to further improve the temperature uniformity of the inner wall of the heating chamber 3, heat needs to be transferred to the far-end arc surface of the ceramic body 2, further, two bimetallic strips 9 are further provided, as shown in fig. 6, the two bimetallic strips 9 are symmetrically arranged on two sides of the ceramic body 2, and the mounting ends of the bimetallic strips 9 contact the PTC thermistor 6, in particular, closely contact with the side surface of the PTC thermistor 6, and when the heating is performed by energizing, the movable ends of the bimetallic strips 9 are bent and are held on the arc surface of the ceramic body 2. With the above structure, heat generated from the side of the PTC thermistor 6 can be transmitted outward through the bimetal 9.

Specifically, the ceramic body 2 includes a passive layer 901 whose inner side is in contact with the ceramic body 2, an active layer 902 fixed to the outer side of the passive layer 901, and a connection portion 903 in contact with the PTC thermistor 6, the connection portion 903 being provided at the mounting end of the bimetal 9.

When the PTC thermistor 6 is not in the electrified state, the bimetallic strip 9 is in a natural stretching state or a slightly bent state, and the far end of the bimetallic strip 9 is not in contact with the far end cambered surface of the ceramic body 2; in the energized state, the PTC thermistor 6 heats, the bimetal 9 in contact with the PTC thermistor heats, the active layer 902 pushes the passive layer 901 to bend and cling to the ceramic body 2 at the far end, so that the effect of far-end heat transfer is achieved, and the temperature uniformity of the heating cavity 3 or the aluminum tube 8 is improved.

Based on the above structure, in order to better realize the heat transfer effect of the bimetal 9, as shown in fig. 6, the connecting portion 903 includes a riser 9031 and a diaphragm 9032, the outer end of the riser 9031 is connected to one end of the passive layer 901, and the diaphragm 9032 is vertically fixed on the riser 9031; the inner end surface of the vertical plate 9031 is contacted with the PTC thermistor 6, so that heat generated by the side surface of the PTC thermistor 6 can be conducted to the bimetallic strip 9, and the outer end surface of the vertical plate 9031 is abutted against the inner side wall of the installation cavity 4; the transverse plate 9032 is inserted into the elastic cavity 503, preferably, the transverse plate 9032 is inserted into the elastic cavity 503 and then contacts with the inner bottom of the elastic lower pole piece 5, so that heat generated by the lower end surface of the PTC thermistor 6 can be transferred to the elastic lower pole piece 5, and the elastic lower pole piece 5 can transfer heat to the transverse plate 9032. In sum, the riser 9031 can convey PTC thermistor 6 side to produce heat, and the diaphragm 9032 can indirectly convey PTC thermistor 6 bottom to produce heat, has improved PTC thermistor 6's heat production utilization efficiency greatly.

In order to facilitate the extraction of the bimetallic strip 9, an extraction port 10 is further provided, the extraction port 10 is symmetrically arranged at the left side and the right side of the installation cavity 4, and the passive layer 901 is extracted from the extraction port 10.

Example 4

Based on the above structure, in the actual use process, when the use is finished, especially when the heating element needs to be quickly stored, the heating element needs to be cooled as soon as possible and is restored to the natural temperature, and related structures are not arranged on the heating element in the prior art. This embodiment 4 is a modification of embodiment 3 in that an abutting fin 11 is provided.

Specifically, as shown in fig. 7, the abutting heat sink 11 is disposed on the front side of the ceramic body 2, for example, the front side of the bipod 1 is extended to form a support seat, the abutting heat sink 11 is mounted on the support seat, or other structures may be provided to mount the abutting heat sink 11. Specifically, when in use, after the PTC thermistor 6 heats, the bimetallic strip 9 is held on the outer wall of the ceramic body 2, in particular on the far-end cambered surface of the ceramic body 2; when the PTC thermistor 6 stops being energized and does not generate heat, the bimetal 9 loses heat support, the movable end of the bimetal 9 starts to stretch and gradually separate from the cambered surface of the ceramic body 2 and further contacts the abutting radiating fin 11, on one hand, the inner side of the bimetal 9 contacts the ceramic body 2, and on the other hand, the movable end of the bimetal 9 contacts the abutting radiating fin 11, so that heat dissipation of the ceramic body 2 is accelerated.

Specifically, the abutting heat sink 11 includes an arc-shaped mounting piece 111 and a heat-radiating metal piece 112 fixed inside the arc-shaped mounting piece 111. The arc-shaped mounting piece 111 provides support, and the heat dissipation metal piece 112 is contacted with the bimetallic strip 9, so that the heat dissipation effect is improved.

Example 5

According to a second aspect of the present invention, there is provided an electrothermal mosquito-repellent incense burner, wherein the assembled heating element of the above embodiments 1 to 4 is applied to the electrothermal mosquito-repellent incense burner, as shown in fig. 8 to 9, further comprising: a base 12, wherein the assembled heating element is fixed on the base 12; the surface cover 13 is arranged on the base 12, and the surface cover 13 is clamped and fixed with the base 12; the integrated switch 14 is arranged at the front end of the base 12, a button 15 is arranged on the integrated switch 14, and the integrated switch 14 is electrically connected with the assembled heating element through a wire; the plug assembly 16 is disposed at the rear end of the base 12, and the plug assembly 16 is electrically connected to the integrated switch 14 through a wire.

The above-mentioned base 12, cover 13, integrated switch 14, button 15, plug assembly 16, etc. all belong to the common structures in the prior art, and are not described herein.

Compared with the traditional heating element, the novel assembled heating element has relatively simple installation process, only the PTC thermistor 6 and the two pole pieces are installed in the bipod 1, the whole is buckled with the ceramic body 2, the bipod 1 and the ceramic are riveted through the aluminum pipe 8, meanwhile, wires can be connected in a riveting, inserting, spot welding and other modes, and the whole process is automatically assembled at one time by adopting automatic equipment, so that the installation convenience and the machining efficiency are greatly improved. Meanwhile, the bimetal 9 is creatively added, and heat generated when the PTC thermistor 6 heats is transferred to the far-end cambered surface of the ceramic body 2, so that the consistency of temperature control can be greatly improved. And the abutting radiating fins 11 are arranged, so that after the ceramic body 2 is used, the ceramic body can be abutted against the bimetallic strip 9 through the extension of the bimetallic strip, and the heat transfer on the ceramic body 2 is facilitated and the waste heat dissipation is accelerated.

While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides an assembled heat-generating body, includes the bipod and installs ceramic body on the bipod, the chamber that generates heat has been seted up to correspondence on ceramic body and the bipod, its characterized in that still includes:

the PTC thermistor is abutted against the upper end of the elastic lower pole piece;

the upper pole piece is abutted to the upper end of the PTC thermistor, the top end of the upper pole piece is abutted to the ceramic body, and the upper pole piece is provided with a second connecting pin which is formed by extending outwards;

the elastic lower pole piece comprises elastic pieces which extend towards the front-back direction and are bent downwards, an elastic cavity is formed between the two elastic pieces, and the elastic pieces elastically abut against the bottom in the installation cavity;

the aluminum pipe is sleeved and riveted in the heating cavity;

the dual-metal-sheet PTC thermistor is characterized by further comprising two dual-metal sheets, wherein the two dual-metal sheets are symmetrically arranged on two sides of the ceramic body, the mounting ends of the dual-metal sheets are in contact with the PTC thermistor, and when the dual-metal sheets are electrified and heated, the movable ends of the dual-metal sheets are bent and are arranged on the cambered surface of the ceramic body in a embracing mode.

2. A fabricated heating element according to claim 1, wherein said bimetal comprises a passive layer having an inner side in contact with said ceramic body, an active layer fixed on an outer side of said passive layer, and a connection portion in contact with said PTC thermistor, said connection portion being provided at a mounting end of said bimetal.

3. A fabricated heating element according to claim 2, wherein the connecting portion comprises a riser and a cross plate, the outer end of the riser is connected with one end of the passive layer, and the cross plate is vertically fixed on the riser;

4. A heating element according to claim 2, further comprising an outlet port which is symmetrically opened on both left and right sides of said mounting chamber, and said passive layer is led out from said outlet port.

5. A mounted heat-generating body as described in claim 1, further comprising an abutting heat-radiating fin provided on a front side of said ceramic body, and when said PTC thermistor does not generate heat, said bimetal movable end extends and contacts said abutting heat-radiating fin.

6. A mounted heat generating body as recited in claim 5, wherein the abutting heat sink comprises an arc-shaped mounting plate and a heat radiating metal plate fixed inside the arc-shaped mounting plate.

7. An electrothermal mosquito-repellent incense burner comprising the assembled heating element according to any one of claims 1 to 6, further comprising:

the assembled heating body is fixed on the base;