CN210579269U

CN210579269U - Ceramic heating core

Info

Publication number: CN210579269U
Application number: CN201920882437.0U
Authority: CN
Inventors: 许伟忠
Original assignee: Changzhou Wujin Great Wall Tools Co ltd
Current assignee: Changzhou Wujin Great Wall Tools Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-05-19
Anticipated expiration: 2029-06-12

Abstract

The utility model provides a ceramic heating core, which comprises a ceramic shell and a heating wire, wherein the lower bottom surface of the ceramic shell is inwards concave with an air guide cavity; at least two groups of mounting holes are also arranged in the ceramic shell in a penetrating way; every group mounting hole includes two mounting holes, it has the wire casing to sink between two adjacent mounting holes of every group mounting hole, ceramic casing outer peripheral face is opened there is heater screw fixed orifices, heater screw fixed terminal and binding nut are equipped with in the heater screw fixed orifices, the heater corresponds the setting of mounting hole group number, be equipped with a set of heater in every group mounting hole, air guide cavity inner peripheral surface corresponds heater screw fixed orifices position department and sinks to have the heater guide way that supplies the heater direction to insert heater screw fixed terminal, the heater includes high resistivity heater and low resistivity lead wire. The utility model has the advantages of reasonable design, through the rational arrangement of heater, ceramic casing's rational design can effectively gather heat, improves the core calorific capacity that generates heat, satisfies hot-blast rifle temperature demand.

Description

Ceramic heating core

Technical Field

The utility model relates to an electric tool especially hot-blast rifle technical field especially relates to a pottery core that generates heat.

Background

The hot air gun is a tool for welding and picking up elements by hot air blown out of a gun core of a heating resistance wire. The ceramic heating core is the most important component of the hot air gun, is powered by a power supply and generates heat under the control of a circuit board of the hot air gun to provide heat energy for the hot air gun. The ceramic heating core is usually installed at the air outlet of the heat gun. Because the energy that lithium cell can provide is lower, ordinary ceramic heating core power is lower, and voltage is 3.6V to 8.4V usually, and the electric current is 8 ampere times, and the power is within 30W. However, the temperature of the heating core of the heat gun is usually required to reach more than 300 ℃, and the ceramic heating core is required to have higher heating power and efficiency, so that the structure of the ceramic heating core needs to be further optimized to effectively improve the heating efficiency and increase the heat of the heating core.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome the deficiency of the prior art, the utility model provides a structural design is reasonable, can effectively gather the heat, improves the core that generates heat and gives out heat efficiency, satisfies the ceramic core that generates heat of hot-air gun temperature demand.

The utility model provides a technical scheme that its technical problem adopted is: a ceramic heating core is arranged in a hot air gun shell and comprises a ceramic shell and a heating wire, wherein the lower bottom surface of the ceramic shell is concavely provided with an air guide cavity, and the inner diameter of the air guide cavity is gradually reduced from bottom to top; at least two groups of mounting holes are also arranged in the ceramic shell in a penetrating way, and the mounting holes are communicated with the upper top surface of the ceramic shell and the air guide cavity; each group of mounting holes comprises two mounting holes, a line passing groove is arranged between every two adjacent mounting holes corresponding to each group of mounting holes on the upper top surface of the ceramic shell, the outer peripheral surface of the ceramic shell is also provided with heating wire screw fixing holes corresponding to each group of mounting holes, the heating wire screw fixing holes are connected with heating wire screw fixing binding posts and binding nuts in a matching way, the heating wires are arranged corresponding to the number of the mounting holes, a group of heating wires are arranged in each group of mounting holes, one end of each heating wire is wound on the heating wire screw fixing binding post, the other end of each heating wire enters one of the mounting holes of the corresponding group through the air guide cavity, then enters the other mounting hole of the corresponding group through the wire passing groove, then passes through the air guide cavity and is wound on the heating wire screw fixing binding post, the inner circumferential surface of the air guide cavity is recessed at a position corresponding to the heating wire screw fixing hole and is provided with a heating wire guide groove for guiding the heating wire to be connected into the heating wire screw fixing binding post; the heating wire comprises a high-resistivity heating wire and low-resistivity leads respectively connected to two ends of the high-resistivity heating wire, the section of the heating wire corresponding to the air guide cavity is the low-resistivity lead, and the section of the heating wire corresponding to the mounting hole is the high-resistivity heating wire.

In the scheme, the winding route of the heating wire is skillfully designed, an open winding structure is adopted, the heating wire is reasonably guided to be wound, a plurality of groups of heating wires can be integrated in a limited ceramic shell, the winding distance can be effectively increased, the heating area can be increased, and the heating power can be effectively improved; meanwhile, the heating wire is designed, a low-resistivity lead is adopted at the position of the air guide cavity, and a high-resistivity heating wire is arranged in the mounting hole, so that concentrated heating is performed at the front end to reduce loss, and potential safety hazards caused by excessive heating of the low-resistivity lead are avoided.

Furthermore, the section of the high-resistivity heating wire close to the upper top surface in the mounting hole is in a spiral winding shape, the length of the heating wire in the mounting hole can be increased through the spiral winding, the heating area is increased, meanwhile, a flow channel for air flow to pass through is formed in the middle of the spiral shape, and heat is conveniently concentrated and dissipated from the ceramic heating core.

Furthermore, the outer wall of the ceramic shell is also provided with a temperature sensing element or temperature protector screw fixing wiring hole corresponding to the thermocouple preformed hole, and a wiring guide groove is formed in the position, corresponding to the temperature sensing element or temperature protector screw fixing wiring hole, of the inner circumferential surface of the air guide cavity in a concave mode.

Furthermore, the ceramic shell is of a step-shaped cylindrical structure, the step-shaped cylindrical structure comprises at least two steps, the diameter of the step positioned at the lowest part is the largest, and the ceramic shell is fixed with the inner wall of the hot air gun shell through the step at the lowest part; the temperature sensing element or the temperature protector is characterized in that the temperature sensing element or the temperature protector screw fixing wiring hole and the heating wire screw fixing hole are the same in structure and are located on the step at the lowest part, and the heating wire guide groove and the wiring guide groove are also the same in structure and are located in the step at the lowest part.

The beneficial effects of the utility model are that, the utility model provides a pottery heating core, structural design is reasonable, through the rational arrangement of heater, ceramic housing's rational design can effectively gather the thermal-arrest volume, improves heating core calorific capacity and the efficiency that generates heat, satisfies hot-blast rifle temperature demand.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of the preferred embodiment of the present invention.

Figure 2 is a perspective view of the preferred embodiment of the present invention in another orientation.

Fig. 3 is a plan view of the present invention.

Fig. 4 is a side view of the present invention.

3 fig. 3 5 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 3 3. 3

Fig. 6 is a perspective view of a heating wire according to the preferred embodiment of the present invention.

In the figure, the heating wire comprises a ceramic shell 1, a ceramic shell 2, an air guide cavity 3, a mounting hole 4, a wire passing groove 5, a heating wire 5-1, a high-resistivity heating wire 5-2, a low-resistivity heating wire 6, a heating wire screw fixing wiring terminal 7, a wiring nut 8, a heating wire guide groove 9, a wiring guide groove 10 and a temperature sensing element or temperature protector screw fixing wiring hole.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The ceramic heating core shown in fig. 1 to 6 is the best embodiment of the present invention, and is installed in the casing of the heat gun, and comprises a ceramic casing 1 and a heating wire 5. The lower bottom surface of the ceramic shell 1 is concavely provided with an air guide cavity 2, and the inner diameter of the air guide cavity 2 is gradually reduced from bottom to top. The air guide cavity 2 with the gradually reduced inner diameter can effectively gather the air flow blown out from the inside of the hot air gun and compress the air flow, so that the flow speed of the air flow passing through the ceramic shell 1 is improved, and the air outlet efficiency of the hot air gun is ensured.

Two groups of mounting holes 3 are also arranged in the ceramic shell 1 in a penetrating way, and the mounting holes 3 are communicated with the upper top surface of the ceramic shell 1 and the air guide cavity 2; every group mounting hole 3 includes two mounting holes 3, and ceramic casing 1 goes up the top surface and recessed between two adjacent mounting holes 3 that correspond every group mounting hole 3 and have

line groove

4, 1 outer peripheral face of ceramic casing on still correspond every group mounting hole 3 and open and have heater screw fixing hole, heater screw fixing hole fit in is connected with heater screw fixing terminal 6 and binding nut 7.

The heating wires 5 are arranged corresponding to 3 groups of mounting holes, a group of heating wires 5 are arranged in each group of mounting holes 3, and the inner circumferential surface of the air guide cavity 2 is recessed from the position corresponding to the heating wire screw fixing hole and provided with a heating wire guide groove 8 for guiding the heating wires 5 to be connected into the heating wire screw fixing wiring terminal 6. One end of the heating wire 5 is wound on the heating wire screw fixing terminal 6, and the other end of the heating wire passes through the heating wire guide groove 8 and then enters the air guide cavity 2, then enters one of the mounting holes 3 of the corresponding group, then enters the other mounting hole 3 of the corresponding group through the wire passing groove 4, then passes back from the air guide cavity 2, passes through the heating wire guide groove 8 and then is wound on the heating wire screw fixing terminal 6.

The heating wire 5 comprises a high-resistivity heating wire 5-1 and low-resistivity leads 5-2 respectively connected to two ends of the high-resistivity heating wire 5-1, and the section of the heating wire 5 corresponding to the air guide cavity 2 is the low-resistivity lead 5-2. The section of the heating wire 5 corresponding to the mounting hole 3 is a high-resistivity heating wire 5-1. The section of the high-resistivity heating wire 5-1 close to the upper top surface in the mounting hole 3 is in a spiral winding shape, the spiral winding can improve the length of the high-resistivity heating wire 5-1 in the mounting hole 3 and increase the heating area, and meanwhile, a flow channel for air flow to pass is formed in the middle of the spiral shape, so that heat can be conveniently concentrated and dissipated from the ceramic heating core. The low-resistivity lead 5-2 is designed at the position of the air guide cavity 2, so that potential safety hazards caused by excessive heating at the position of the air guide cavity can be avoided, the front end of the mounting hole 3 is guaranteed to be heated intensively, and the loss of heat in the flow is reduced. In the actual connection process, the high-resistivity heating wire 5-1 and the low-resistivity heating wire 5-2 are connected into a whole in a welding mode.

The outer wall of the ceramic shell 1 is also provided with a temperature sensing element or temperature protector screw fixing wiring hole 10 which can be used for connecting and installing the temperature sensing element or temperature protector. And a wiring guide groove 9 for the wiring of the temperature sensing element or the temperature protector to pass through is recessed at the position, corresponding to the screw fixing wiring hole 10 of the temperature sensing element or the temperature protector, of the inner peripheral surface of the air guide cavity 2. Two or more temperature sensing elements or temperature protectors are usually designed with screw fixing wiring holes 10 spaced uniformly. Preferably, the temperature sensing element or temperature protector screw fixing wiring hole 10 and the heating wire screw fixing hole are alternately arranged on the same radial plane of the outer wall of the ceramic shell 1.

In the practical design, in order to facilitate the installation and fixation of the ceramic shell 1, the ceramic shell 1 is in a step-shaped cylindrical structure, the step-shaped cylindrical structure comprises at least two steps, the diameter of the step positioned at the lowest part is the largest, and the ceramic shell 1 is fixed with the inner wall of the hot air gun shell through the step at the lowest part; the temperature sensing element or temperature protector screw fixing wiring hole 10 and the heating wire screw fixing hole are the same in structure and are located on the step at the lowest position, and the heating wire guide groove 8 and the wiring guide groove 9 are also the same in structure and are located in the step at the lowest position.

The ceramic heating core of so design, structural design is reasonable, ingenious design the wire winding route of heater 5 to adopt uncovered formula wire winding structure, reasonable guide heater 5 wire winding, can integrate multiunit heater 5 in limited ceramic casing 1. Through the reasonable layout of heating wire 5, ceramic casing 1's rational design can effectively improve the wire winding distance, increases the area of generating heat, effectively improves the power of generating heat, improves the core calorific capacity that generates heat, satisfies hot-blast rifle temperature demand.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a pottery core that generates heat, installs in the heat gun casing, its characterized in that: the heating device comprises a ceramic shell (1) and a heating wire (5), wherein the lower bottom surface of the ceramic shell (1) is provided with an air guide cavity (2) in an inwards concave manner, and the inner diameter of the air guide cavity (2) is gradually reduced from bottom to top; at least two groups of mounting holes (3) are further arranged in the ceramic shell (1) in a penetrating manner, and the mounting holes (3) are communicated with the upper top surface of the ceramic shell (1) and the air guide cavity (2); each group of mounting holes (3) comprises two mounting holes (3), a line passing groove (4) is formed in a position, corresponding to each group of mounting holes (3), of the upper top surface of the ceramic shell (1) in a downward concave mode, a heating wire screw fixing hole is formed in the outer peripheral surface of the ceramic shell (1) and corresponds to each group of mounting holes (3), a heating wire screw fixing terminal (6) and a wiring nut (7) are connected in the heating wire screw fixing hole in a matched mode, the heating wires (5) are arranged in groups corresponding to the mounting holes (3), a group of heating wires (5) are arranged in each group of mounting holes (3), one end of each heating wire (5) is connected to the heating wire screw fixing terminal (6) in a winding mode, the other end of each heating wire (5) enters one of the corresponding group of mounting holes (3) through the line passing groove (4) and then enters the other corresponding group of mounting holes (3) through the line passing groove (4) and then passes through the air guide cavity (2) and then returns to the heating wire screw, the inner circumferential surface of the air guide cavity (2) is recessed at a position corresponding to the heating wire screw fixing hole and is provided with a heating wire guide groove (8) for guiding the heating wire (5) to be connected into the heating wire screw fixing binding post (6); the heating wire (5) comprises a high-resistivity heating wire (5-1) and low-resistivity leads (5-2) respectively connected to two ends of the high-resistivity heating wire (5-1), the section of the heating wire (5) corresponding to the air guide cavity (2) is the low-resistivity lead (5-2), and the section of the heating wire (5) corresponding to the mounting hole (3) is the high-resistivity heating wire (5-1).

2. A ceramic heater core according to claim 1, wherein: the section of the high-resistivity heating wire (5-1) close to the upper top surface in the mounting hole (3) is spirally wound.

3. A ceramic heater core according to claim 1, wherein: the ceramic temperature-sensing device is characterized in that a temperature-sensing element or temperature protector screw fixing wiring hole (10) is further formed in the outer wall of the ceramic shell (1), and a wiring guide groove (9) is formed in the position, corresponding to the temperature-sensing element or temperature protector screw fixing wiring hole (10), of the inner circumferential surface of the air guide cavity (2) in a concave mode.

4. A ceramic heater core according to claim 3, wherein: the ceramic shell (1) is of a step-shaped cylindrical structure, the step-shaped cylindrical structure comprises at least two steps, the diameter of the step positioned at the lowest part is the largest, and the ceramic shell (1) is fixed with the inner wall of the shell of the heat gun through the step at the lowest part; the temperature sensing element or temperature protector screw fixing wiring hole (10) and the heating wire screw fixing hole are the same in structure and are located in the step at the lowest position, and the heating wire guide groove (8) and the wiring guide groove (9) are also the same in structure and are located in the step at the lowest position.