CN108592397B

CN108592397B - Improved hot air gun

Info

Publication number: CN108592397B
Application number: CN201810579235.9A
Authority: CN
Inventors: 袁顺荣; 袁俊峰
Original assignee: Yixing Rongtai Electrical Co ltd
Current assignee: Yixing Rongtai Electrical Co ltd
Priority date: 2018-06-07
Filing date: 2018-06-07
Publication date: 2023-06-06
Anticipated expiration: 2038-06-07
Also published as: CN108592397A

Abstract

The utility model provides an improved hot air gun, includes heating core, air supply subassembly, power supply subassembly, the heating core encapsulation in mica inner tube, mica inner tube overcoat has the metal tube, metal tube is equipped with the perforated metal protection tube outward, the heating core comprises ceramic support and heater, central position in the cylindric ceramic support is opened there is a central through-hole, central through-hole peripheral evenly distributed round with a plurality of through-holes of central through-hole coaxial, each through-hole and central through-hole between communicate integratively through the seam way, the heater alternates in some or all through-holes, its simple structure, the heating core ventilation effect is good, is difficult for forming high temperature, in addition the ceramic head is installed to the heating core head, joint strength is big, uses safelyr.

Description

Improved hot air gun

Technical Field

The present invention relates to a heat gun that is capable of rapidly igniting a charcoal bed or other solid fuel on an open barbecue or other surface.

Background

US7717104B2 discloses an electrothermal air gun comprising a highly efficient ceramic encapsulated heating element no more than 8mm from the outlet to generate a high outlet temperature between 850-1100 ℃ to enable rapid ignition when the outlet of the electrothermal air gun is placed on the fuel surface. The cold contact cap, handle and perforated outer tube outside the heating element provide safety in use. The heating element is completely encapsulated in ceramic, which is not comparable in terms of heating, durability and lifetime. The electric heating gun has the other characteristic that the electric heating gun is provided with a bracket which can hang the still-warm heating gun, and the bracket is also combined with the bottle opener. The heating wire of the heating element is wound on the spiral channel of the framework, the reserved gaps around the heating wire are less, and after long-time power on, the heating wire generates excessive heat and still has the phenomenon of burn-out. Second, the heating element is placed no more than 8mm from the outlet, although high outlet temperatures can be produced, safety presents a further concern.

In the existing heat gun, heating wires are also arranged in ceramic through holes, such as a ceramic bracket of a heating core of the heat gun disclosed in China patent 201120162957.8, through holes are arranged in the ceramic bracket along the radial direction, a partition plate is arranged between the through holes, the number of layers of the through holes arranged along the radial direction of the ceramic bracket is two or more, and the heating wires are inserted in the through holes. The heating component with the structure is very sufficient for air heating during working, but each through hole is independent, the through holes are not communicated with each other, heating is uneven in the heating process, after the heating component is used for a long time, high temperature is easy to generate, the heating wire of the heating core is easy to blow, a heat gun is damaged, and accidents are generated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides an improved hot air gun which is simple in structure, good in ventilation, not prone to generating high temperature, free of burning, longer in service life and safer to use. The main improvement is to improve the ceramic support structure of the heating core of the hot air gun, so that the heating wire has good ventilation in working, and even if the heating time is too long, the phenomenon of overheat burning can not occur.

The technical scheme of the invention is as follows: the utility model provides an improved hot air gun, includes heating core, air supply subassembly, power supply subassembly, the heating core encapsulation in mica inner tube, mica inner tube overcoat has the metal tube, metal tube is equipped with the perforated metal protection tube outward, its characterized in that heating core comprises ceramic support and heater, the central point in the cylindric ceramic support puts and opens there is a central through-hole, central through-hole peripheral evenly distributed round with a plurality of through-holes of central through-hole coaxial, each through-hole and central through-hole between communicate integratively through the seam way, the heater alternates in some or all through-holes.

Further, the central through holes and the through holes distributed on the outer ring of the central through holes are round holes, and the number of the through holes uniformly distributed on the outer ring of the central through holes is 4-10, and optimally 6-7. The ceramic support is an important component of the heating core, the heating wires can be placed in part or all of the through holes in theory, the heating wires can also be placed in the central through holes, and in order to ensure the heating effect, the heating wires are optimally placed in all of the through holes, and the heating wires are placed in the central through holes if necessary. The heating wire densely wound into a spring shape passes through one through hole in the ceramic bracket, and then is folded back and penetrated into the adjacent through holes, and the operation is performed in a reciprocating manner until the heating wire is penetrated in each through hole or part of the through holes. Furthermore, the outer end part of at least one slot in the ceramic bracket is provided with a heating wire bridge, when the heating wire needs to be placed in the central through hole or the through holes penetrated before and after the heating wire are not adjacent, the heating wire needs to be crossed by taking the bridge as a support, so that the heating wire is relatively fixed and is not easy to slide. Because the through holes of the outer ring are communicated with the central through hole, the ventilation effect is good, the over-high temperature is not easy to generate and the heating is even, the hot air gun is not easy to burn, and the safety and the reliability are ensured.

The width of the seam between each through hole and the central through hole is smaller than the diameter of the spring section of the heating wire so as to prevent the heating wire from sliding out of the seam.

In order to prevent the heating wire from sliding randomly when entering another through hole from one through hole, a concave block is arranged on the partition wall at the outer end part of the ceramic bracket between adjacent through holes, and the heating wire spans the concave block on the partition wall to enter the next through hole.

Grooves are formed in the outer surface of the cylindrical ceramic support between the adjacent through holes along the axial direction. The groove plays a role of a cooling air duct, the space between the ceramic support and the mica inner tube can be increased, the high temperature generated by the heating wire is easy to emit, the heat dissipation effect is improved, the heat conducted to the outer sleeve is reduced, and therefore the air heater is not easy to burn out, and accidents are avoided.

The grooves formed in the outer surfaces of the cylindrical ceramic supports between the adjacent through holes along the axial direction are arc-shaped grooves, and the arc-shaped grooves can ensure the largest groove area and maintain the strength of the ceramic supports. The outside surface of the ceramic support outside the through hole is provided with linear ribs in the axial direction, when the ceramic support is placed into the mica inner tube of the heating gun, the linear ribs are contacted with the inner tube in a line mode when touching the inner tube, and therefore the ceramic support is not easy to clamp and easy to install.

The ceramic sealing head is arranged at the head of the ceramic support at the outlet end of the hot air gun, a central hole and an outer ring hole which correspond to and are communicated with the central through hole of the ceramic support and the through hole of the outer ring are arranged on the ceramic sealing head, partition walls are arranged between the central hole and the outer ring hole and are not communicated with each other, a plurality of raised strips are arranged at one end of the ceramic sealing head, the number of the raised strips is smaller than or equal to the number of grooves on the outer surface of the ceramic support, and the raised strips are inserted into the grooves. The matched joint structure enables the sealing head and the ceramic support to form a lap joint relationship, the ceramic sealing head keeps a certain distance from the heating core to the outlet of the hot air gun, and all holes of the ceramic sealing head are not communicated with each other, so that the connection strength is increased, and the outlet is ensured to obtain high temperature and is safer.

Further, the diameter of the ceramic seal head is equal to or slightly larger than the diameter of the ceramic support, and most preferably, the diameter of the ceramic seal head is 20-30 filaments larger than the diameter of the ceramic support. The design ensures that the ceramic seal head is closely attached to the mica inner tube, and the ceramic seal head and the mica inner tube are stably packaged in the mica inner tube together with the heating core.

The thickness of the ceramic seal head is more than 8mm, and the optimal thickness is 8.5-15mm, and the distance can well ensure the high temperature of an outlet and has good safety.

The metal protection tube at the outermost layer of the hot air gun is provided with a handle which is used for being hung on other devices such as a barbecue grill and the like, and is convenient to take.

The beneficial effects are that: the heat gun has the advantages of simple structure, good ventilation effect of the heating core, difficult formation of high temperature, and high connection strength due to the fact that the ceramic sealing head is arranged at the head of the heating core, and safer use.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view of a ceramic bracket.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a schematic structural view of a ceramic bracket.

Fig. 5 is a top view of fig. 4.

Fig. 6 is a top view of a ceramic closure.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

The embodiment 1, an improved hot air gun, including heating core, air supply assembly, power supply assembly, the heating core is encapsulated in mica inner tube 15, mica inner tube 15 overcoat has metal tube 16, metal tube 16 is equipped with the metal protection tube 17 of perforation outward, the heating core is formed by ceramic support 1 and heater 18, the central position in the cylindric ceramic support 1 opens a central through-hole 4, the peripheral evenly distributed of central through-hole 4 a round and central through-hole 2 with the same axial through-hole, the quantity of through-hole 2 is 6, each through-hole 2 and central through-hole 4 communicate integratively through the seam way 7, the heater is placed in some or all through-holes 2 as required, be equipped with the concave block 8 on the outer tip partition wall 3 of ceramic support 1 between the adjacent through-hole 2, the heater strides over the concave block 8 on the partition wall 3 and gets into next through-hole; the width of the slot 7 between each through hole 2 and the central through hole 4 is smaller than the diameter of the spring section of the heating wire. Grooves 5 are formed in the outer surface of the cylindrical ceramic support 1 between the adjacent through holes 2 along the radial direction.

The ceramic head 10 is installed at the ceramic support head of hot air gun exit end, and ceramic head 10 thickness is 8.5mm, is equipped with the central hole 11 and the outer lane hole 12 that correspond and communicate with the through-hole 2 of ceramic support 1 center through-hole 4 and outer lane on the ceramic head 10, and the central hole 11 is with outer lane hole 12 interval has the partition wall not to communicate each other, and ceramic head one end has set up 3 sand grip 13, and sand grip 13 inserts in recess 5.

The metal protecting tube of the outermost layer of the heat gun is provided with a handle 14.

In example 2, referring to example 1, the central through hole 4 of the ceramic support of the heating core and the through holes 2 distributed on the outer ring are circular holes, the outer end of one slot 7 in the ceramic support 1 is provided with a heating wire gap bridge 9, and the heating wire is inserted into the through holes 2 and the central through hole 4 by means of the concave block 8 on the partition wall 3 at the outer end of the ceramic support 1 and the heating wire gap bridge 9 on the slot 7. The grooves 5 formed on the outer surfaces of the cylindrical ceramic supports 1 between the adjacent through holes 2 along the axial direction are arc-shaped grooves, and linear ribs 6 are arranged on the outer surfaces of the ceramic supports 1 outside the through holes 2 along the axial direction.

The diameter of the ceramic seal head 10 in the hot air gun is 20-30 filaments larger than the diameter of the ceramic support 1, and the thickness of the ceramic seal head 10 is 10mm.

According to design requirements, the number of through holes on the ceramic support can be more or less, generally 4-10, heating wire gap bridges can be arranged in at least one slot, the thickness of the ceramic seal head is more than 8mm, and the optimal thickness is 8.5-15mm, and the ceramic seal head belongs to the protection scope of the invention.

Claims

1. The utility model provides an improved hot air gun, includes heating core, air supply subassembly, power supply subassembly, the heating core encapsulation in mica inner tube, mica inner tube overcoat has the metal tube, metal tube is equipped with the perforated metal protection tube outward, its characterized in that heating core comprises ceramic support and heater, the central point in the cylindric ceramic support puts and opens there is a central through-hole, central through-hole peripheral evenly distributed round with a plurality of through-holes of central through-hole coaxial, each through-hole and central through-hole between communicate integratively through the seam way, the heater alternates in some or all through-holes.

2. The improved heat gun of claim 1 wherein the central through hole and the through holes distributed in the outer race thereof are circular holes.

3. The improved heat gun of claim 1, wherein the number of through holes uniformly distributed in the outer periphery of the central through hole is 4-10.

4. The improved heat gun of claim 3 wherein the number of holes evenly distributed in the outer periphery of the central through hole is 6-7.

5. The improved heat gun of claim 1 wherein a heater is also disposed in the central through hole.

6. The improved heat gun of claim 5 wherein the outer end of at least one slot in the ceramic support is provided with a heater bridge.

7. The improved heat gun of claim 1, wherein the width of the slot between each through hole and the central through hole is less than the diameter of the spring section of the heater wire.

8. The improved heat gun of claim 7, wherein the partition walls at the outer ends of the ceramic brackets between adjacent through holes are provided with recessed blocks, and the heater spans the recessed blocks on the partition walls to enter the next through hole.

9. The improved heat gun of claim 1, wherein the cylindrical ceramic support outer surface between adjacent through holes is fluted in the axial direction.

10. The improved heat gun of claim 9 wherein the recess is an arcuate recess.

11. The improved heat gun of claim 9, wherein the outer surface of the ceramic support outside the through hole is provided with linear ribs in the axial direction.

12. The improved heat gun according to claim 1, wherein a ceramic seal head is mounted on the ceramic support head at the outlet end of the heat gun, the ceramic seal head is provided with a central hole and an outer ring hole which correspond to and are communicated with the central through hole of the ceramic support and the through hole of the outer ring, a partition wall is arranged between the central hole and the outer ring hole and is not communicated with each other, a plurality of raised strips are arranged at one end of the ceramic seal head, the number of the raised strips is smaller than or equal to the number of grooves on the outer surface of the ceramic support, and the raised strips are inserted into the grooves.

13. The improved heat gun of claim 12, wherein the ceramic head has a diameter equal to or greater than 20-30 wires of the ceramic support.

14. The improved heat gun of claim 12, wherein the ceramic head has a thickness of 8.5-15mm.

15. The improved heat gun of claim 1 wherein the metal protective tube is provided with a handle.