CN215864053U

CN215864053U - Hot air gun

Info

Publication number: CN215864053U
Application number: CN202121736387.9U
Authority: CN
Inventors: 周超; 范鑫鑫; 宋建飞
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-02-18
Anticipated expiration: 2031-07-28

Abstract

The utility model relates to a hot air gun, which comprises a shell, a motor assembly arranged in the shell, a fan assembly driven by the motor assembly and a heating core assembly protruding out of the front end of the shell, wherein the fan assembly is positioned between the motor assembly and the heating core assembly; the bracket comprises an exhaust hole which is inwards sunken from the bottom of the winding part, and the air flow blown to the bracket by the fan assembly passes through the exhaust hole. According to the utility model, the exhaust holes are formed in the bottom of the winding part of the ceramic support, so that airflow blowing to the support can pass through the exhaust holes and circulate in the exhaust holes, and the heat dissipation performance of the heating core assembly is improved.

Description

Hot air gun

[ technical field ] A method for producing a semiconductor device

The present invention relates to a heat gun, and more particularly to a heat gun with an improved heat core assembly.

[ background of the utility model ]

The hot air gun is a tool which generates high temperature by the heating core component and blows out high-temperature airflow through the fan component to weld and pick up components. In the prior art, a bracket of the heating core assembly is made of ceramic materials, and the ceramic-based bracket has good heat dissipation performance and heat absorption performance; however, when the heating core assembly is frequently switched on and switched off, the temperature change between the contact parts of the resistance wire and the ceramic support is large, so that the heat dissipation is not uniform, and the resistance wire is blown; and current ceramic support structure is more single, is unfavorable for the circulation of air current in the core subassembly that generates heat to make the heat dispersion of the core subassembly that generates heat relatively poor.

Accordingly, there is a need for an improved heat gun that overcomes the deficiencies of the prior art.

[ Utility model ] content

Aiming at the defects of the prior art, the utility model aims to provide a hot air gun with long service life and good performance.

The utility model solves the problems of the prior art by adopting the following technical scheme: a hot air gun comprises a shell, a motor assembly arranged in the shell, a fan assembly driven by the motor assembly and a heating core assembly protruding out of the front end of the shell, wherein the fan assembly is positioned between the motor assembly and the heating core assembly; the bracket comprises an exhaust hole which is inwards sunken from the bottom of the winding part, and the air flow blown to the bracket by the fan assembly passes through the exhaust hole.

The further improvement scheme is as follows: the bracket comprises a first guide part and a second guide part which are arranged at two end parts of the base, and the airflow blows towards the bracket through the first guide part, flows through the exhaust hole and blows away from the bracket through the second guide part.

The further improvement scheme is as follows: the first guide portion and the second guide portion are arranged obliquely with respect to the base, and extend from both end sides of the base toward the receiving portion.

The further improvement scheme is as follows: the first guide part and the second guide part respectively form an included angle of 10 degrees with the base.

The further improvement scheme is as follows: the bracket comprises a plurality of the adapting parts, and the adapting parts have different protruding heights on the surface of the base.

The further improvement scheme is as follows: the casing is including seting up the air inlet in the rear end, the core subassembly that generates heat is including being located the gas outlet of casing front end, motor element drive fan assembly rotates to with outside air current via the air inlet inhales in the casing, and follow the heat that the core subassembly that generates heat produces the gas outlet is outwards discharged.

The further improvement scheme is as follows: the heating core assembly is installed in the casing, the casing includes the thermovent of seting up in the front end, the thermovent with the position of hot coil is corresponding, just the thermovent with the hot coil is spaced apart.

The further improvement scheme is as follows: the heating core assembly comprises an air duct sleeved on the periphery of the hot coil, the fan assembly comprises fan blades connected to the motor assembly and a flow shooting cover accommodating the fan blades, and the air duct is connected to the flow shooting cover.

The further improvement scheme is as follows: the heat gun comprises a holding part extending downwards from the lower end of the casing and a control component arranged in the holding part, and the motor component and the heating core component are electrically connected with the control component.

Compared with the prior art, the utility model has the following beneficial effects: the exhaust holes are formed in the bottom of the winding part of the ceramic support, so that airflow blowing towards the support can pass through the exhaust holes and circulate in the exhaust holes, and the heat dissipation performance of the heating core assembly is improved; the air flow can simultaneously flow through the upper part and the lower part of the hot coil, so that the heat radiation of the hot coil is more uniform, and the hot coil part contacted with the winding part can not be blown off due to the change of temperature even under the condition that the heating core assembly is frequently switched on and switched off; set up first guide and second guide at the both ends of base, the air current flows more smoothly on the support to the heat dispersion of heating core subassembly has been promoted.

[ description of the drawings ]

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings:

FIG. 1 is a schematic view of the overall structure of a heat gun according to the present invention;

FIG. 2 is a schematic exploded view of the heat gun of FIG. 1;

FIG. 3 is a schematic view of a heat generating core assembly of the heat gun of FIG. 1;

fig. 4 is a schematic view of a structure of a bracket in the heat-generating core assembly shown in fig. 3.

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, a heat gun 100 according to an embodiment of the present invention includes a housing 1, a motor assembly 2 installed in the housing 1, a fan assembly 3 driven by the motor assembly 2, a heat generating core assembly 4 protruding out of a front end of the housing 1, a holding portion 5 extending downward from a lower end of the housing 1, a control assembly 6 installed in the holding portion 5, and a switch assembly 7 installed on the holding portion 5, wherein the motor assembly 2 is located at a rear end of the housing 1, the heat generating core assembly 4 is installed inside the front end of the housing 1, and the fan assembly 3 is located between the motor assembly 2 and the heat generating core assembly 4; the holding part 5 is positioned at the end part of the machine shell 1 close to the side of the motor component 2, and the motor component 2, the heating core component 4 and the switch component 7 are electrically connected with the control component 6.

In practical use, a user presses the switch component 7 to start the motor component 2 and drive the fan component 3 to rotate, and when the fan component 3 runs at a high speed, heat generated by the heating core component 4 is carried by airflow and blown out of the hot air gun 100, and the heating operation is performed on the components.

In the present embodiment, the casing 1 includes an air inlet 11 opened at the rear end, the heat generating core assembly 4 includes an air outlet 44 located at the front end of the casing 1, and the motor assembly 2 drives the fan assembly 3 to rotate, so as to draw external air into the casing 1 through the air inlet 11 and discharge heat generated by the heat generating core assembly 4 to the outside through the air outlet 44.

As shown in fig. 1, the heat gun 100 further includes a protection portion 8 disposed at the front side of the holding portion 5, the protection portion 8 is connected between the bottom of the holding portion 5 and the lower end of the casing 1, the protection portion 8, the casing 1 and the holding portion 5 surround to form a holding area 9 for accommodating fingers of a user, and the protection portion 8 can prevent the user from directly touching the portion of the casing 1 where the heat generating core assembly 4 is located when the user uses the heat gun, which may cause the user to be scalded.

In the present embodiment, the casing 1 includes the heat dissipation opening 12 opened at the front end, the heat dissipation opening 12 corresponds to the position of the heat generating core assembly 4, and the heat dissipation opening 12 and the heat coil 43 are spaced apart from each other, so as to further prevent the user from being scalded.

Referring to fig. 2, the heating core assembly 4 includes an air duct 45 disposed around the outer periphery of the hot coil 43, the fan assembly 3 includes a fan blade 31 connected to the motor assembly 2 and a flow-taking cover 32 for accommodating the fan blade 31, the air duct 45 is connected to the flow-taking cover 32, and an air flow generated by the fan blade 31 flows between the flow-taking cover 32 and the air duct 45 to reduce air loss.

Referring to fig. 3, the heating core assembly 4 includes a positioning seat 41, a bracket 42 mounted on the positioning seat 41, and a heat coil 43 spirally wound on the positioning seat 41 and the bracket 42, wherein the positioning seat 41 has two parts which cross at 90 degrees to form a cross shape, and the positioning seat 41 is made of an insulating material; the four brackets 42 are respectively accommodated in four spaces formed by the two positioning seats 41 in a crossed manner, and the brackets 42 are made of ceramic materials.

As shown in fig. 4, the bracket 42 includes a base 421 supported by the positioning seat 41, a receiving portion 422 protruding outward from the surface of the base 421, a winding portion 423 recessed inward from the end surface of the receiving portion 422, a first guiding portion 424 and a second guiding portion 425 disposed at two end portions of the base 421, and an exhaust hole 426 recessed inward from the bottom of the winding portion 423, and the hot coil 43 is wound in the winding portion 423 and does not extend into the exhaust hole 426, so that the air flow blown to the bracket 42 by the fan assembly 3 can pass through the exhaust hole 426 and circulate in the exhaust hole 426, thereby improving the heat dissipation performance of the heat generating core assembly 4; in addition, the exhaust hole 426 is formed at the bottom of the winding portion 423, and the air current flows through the upper and lower portions of the heat coil 43 at the same time, so that the heat radiation of the heat coil 43 is more uniform, and the portion of the heat coil 43 contacting the winding portion 423 is not blown by the temperature change even when the heat core assembly 4 is frequently turned on and off.

In the present embodiment, the first guide part 424 and the second guide part 425 are disposed obliquely with respect to the base 421, and specifically, the first guide part 424 and the second guide part 425 extend from both end sides of the base 421 toward the receiving part 422. With such an arrangement, the airflow is blown to the bracket 42 through the first guiding portion 424, flows through the air discharging hole 426, and is blown off from the bracket 42 through the second guiding portion 425, so that the airflow flows more smoothly on the bracket 42, and the heat dissipation performance of the heat generating core assembly 4 is improved.

In the present embodiment, the included angle α between each of the first guide portion 424 and the second guide portion 425 and the base 421 is 10 degrees.

In the present embodiment, the receiving portions 422 have a plurality of heights, and the heights of the plurality of receiving portions 422 protruding from the surface of the base 421 are different, so as to increase the ventilation and improve the heat dissipation performance of the heat generating core assembly 4.

The exhaust holes 426 are arranged at the bottom of the winding part 423 of the ceramic bracket 42, so that the airflow blowing to the bracket 42 can pass through the exhaust holes 426 and circulate in the exhaust holes 426, and the heat dissipation performance of the heating core component 4 is improved; and the air current flows through the upper and lower portions of the hot coil 43 at the same time, so that the heat radiation of the hot coil 43 is more uniform, and the portion of the hot coil 43 contacting the winding portion 423 is not burned out by the change of temperature even if the heat generating core assembly 4 is frequently turned on and off; the first guide portions 424 and the second guide portions 425 are provided at both end portions of the base 421, so that the airflow on the bracket 42 flows more smoothly, and the heat dissipation performance of the heat generating core assembly 4 is improved.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many other alternatives to the heat gun of the present invention can be made without departing from the spirit and scope of the utility model. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A hot air gun comprises a shell, a motor assembly arranged in the shell, a fan assembly driven by the motor assembly and a heating core assembly protruding out of the front end of the shell, wherein the fan assembly is positioned between the motor assembly and the heating core assembly; the method is characterized in that: the bracket comprises an exhaust hole which is inwards sunken from the bottom of the winding part, and the air flow blown to the bracket by the fan assembly passes through the exhaust hole.

2. The heat gun according to claim 1, wherein: the bracket comprises a first guide part and a second guide part which are arranged at two end parts of the base, and the airflow blows towards the bracket through the first guide part, flows through the exhaust hole and blows away from the bracket through the second guide part.

3. The heat gun according to claim 2, wherein: the first guide portion and the second guide portion are arranged obliquely with respect to the base, and extend from both end sides of the base toward the receiving portion.

4. A heat gun according to claim 3, wherein: the first guide part and the second guide part respectively form an included angle of 10 degrees with the base.

5. The heat gun according to claim 1, wherein: the bracket comprises a plurality of the adapting parts, and the adapting parts have different protruding heights on the surface of the base.

6. The heat gun according to claim 1, wherein: the casing is including seting up the air inlet in the rear end, the core subassembly that generates heat is including being located the gas outlet of casing front end, motor element drive fan assembly rotates to with outside air current via the air inlet inhales in the casing, and follow the heat that the core subassembly that generates heat produces the gas outlet is outwards discharged.

7. The heat gun according to claim 1, wherein: the heating core assembly is installed in the casing, the casing includes the thermovent of seting up in the front end, the thermovent with the position of hot coil is corresponding, just the thermovent with the hot coil is spaced apart.

8. The heat gun according to claim 7, wherein: the heating core assembly comprises an air duct sleeved on the periphery of the hot coil, the fan assembly comprises fan blades connected to the motor assembly and a flow shooting cover accommodating the fan blades, and the air duct is connected to the flow shooting cover.

9. The heat gun according to claim 1, wherein: the heat gun comprises a holding part extending downwards from the lower end of the casing and a control component arranged in the holding part, and the motor component and the heating core component are electrically connected with the control component.