CN114198906B - Wind direction variable hot air gun for electronic information engineering and use method thereof - Google Patents

Abstract

The invention discloses a variable wind direction hot air gun for electronic information engineering and its use method, which comprises a heat gun body and an air nozzle tube on the heat gun body, and a variable wind direction component is connected to the outer peripheral surface of the air outlet end of the air nozzle tube The variable wind direction assembly includes a variable wind direction head and a variable direction adjustment assembly matched with it; the variable wind direction head includes an air inlet part, a variable wind guide part and a force ring, the air inlet part has an air inlet and a first outlet, and the variable wind direction The wind guide part has a second outlet, and the second outlet cooperates with the first outlet to form an air discharge channel; the direction changing adjustment assembly includes a mounting ring and a push rod matched with the force ring. The present invention changes the air blowing direction of the original hot air gun through the cooperation between the variable wind direction head and the change direction adjustment assembly, and then achieves the purpose of direction adjustment. The threaded connection method of the tube is convenient for switching the use state, taking into account the practicability of the product on the basis of the innovation of the heat gun.

Description

A variable wind direction heat gun for electronic information engineering and its use method

Technical field:

The invention relates to the technical field of electronic information engineering appliances, and mainly relates to a variable wind direction heat gun for electronic information engineering and a method for using the same.

Background technique:

The electronic information engineering major cultivates senior engineering and technical personnel and management personnel who have the basic knowledge and application ability of electronic technology and information systems, and can engage in the research, design, development, application and management of various electronic equipment, information systems, and radio and television systems.

There are also many appliances involved in the specialty of electronic information engineering, including hot air guns. The hot air gun is mainly a tool for welding and picking components by using the hot air blown from the gun core of the heating resistance wire. The process requirements are also very high. high. Heat guns are used for everything from removing or installing small components to large integrated circuits. In different occasions, there are special requirements for the temperature and air volume of the heat gun. If the temperature is too low, the components will be soldered, and if the temperature is too high, the components and circuit boards will be damaged.

In the actual operation process, when it is necessary to operate the hot air blower on areas with complex structures or small disassembly angles, the blowing angle of the air source of the hot air blower cannot cover its surface, resulting in the failure of the component board to be removed by heat. Therefore, it is necessary to invent a method that can change A hot air blower with a hot air blowing angle.

Invention content:

The purpose of the present invention is to make up for the defects of the prior art, to provide a variable wind direction heat gun for electronic information engineering and its use method, and to solve the problems raised by the above-mentioned background technology.

The present invention is achieved through the following technical solutions:

A heat gun with variable wind direction for electronic information engineering, comprising a heat gun body and an air nozzle tube on the heat gun body, external threads are distributed on the outer circumferential surface of the air outlet end of the air nozzle tube, and the threaded connection has a variable wind direction components;

The variable wind direction component includes a variable wind direction head and a variable direction adjustment component matched therewith;

The variable wind direction head includes an air inlet part, a variable wind guide part and a force ring, the air inlet part has an air inlet and a first outlet, the variable wind guide part has a second outlet, and the second outlet cooperates with the first An outlet forms an air discharge channel; wherein, by arranging the variable wind guide part and the air inlet part to be relatively movable, the air discharge direction of the air discharge channel can be adjusted, and the force ring is fixedly sleeved On the outside of the variable wind guide part;

The direction change adjustment assembly includes a mounting ring threadedly connected with the air nozzle pipe and a push rod matched with the force ring, and the push rod is fixedly installed on the mounting ring and is located near the variable wind direction head side.

The sum of the axial lengths of the variable wind direction head and the direction changing adjustment assembly is less than the length of the air nozzle pipe.

The variable wind direction head of the air inlet part is a spherical structure, one end of the sphere is provided with an air inlet, the air inlet is connected with a connecting sleeve connected with the air nozzle pipe, and the other end of the sphere is provided with a first outlet , the variable air guide part is a spherical structure matched with the air inlet part, which is snap-fitted on the air inlet part, and its front end is provided with a second outlet, and the second outlet is provided with a guide tube, so The diameters of the first outlet and the guide tube are larger than the diameter of the air nozzle pipe.

A sealing assembly is provided on the end surface of the air inlet part and the variable air guide part, and the sealing assembly includes an O-ring, and the outer peripheral surface of the first outlet of the air inlet part is distributed with card slots 1. An O-ring seal is installed in the first slot, and a second slot is distributed on the inner circumferential surface of the tail of the wind deflector, and an O-ring is also installed in the second slot.

The stressed ring is set up and down parallel to the second outlet on the variable wind guide part, the inner surface of the stressed ring is welded on the outer peripheral surface of the tail of the variable wind guided part, and the stressed ring faces the air jet A plurality of limiting cavities arranged at intervals and distributed on the circumference are distributed on the end surface in the direction of the mouthpiece.

The outer side of the installation ring is provided with two symmetrically arranged guide installation blocks, and the inside of the guide installation blocks is guided and installed with a push rod. The rear end of the push rod is provided with a limit block, and a spring is sleeved on the push rod between the limit block and the guide installation block.

The second outlet end of the variable air guide part is fixedly connected with a guide tube, and the guide tube is a retractable structure, which includes a cylinder body 1, and the cylinder body 2 is sleeved on the outside of the cylinder body 1. The second cylinder is screwed on the first cylinder, and the outer surfaces of the first cylinder and the second cylinder are respectively provided with graduation marks distributed in the axial direction.

The diameters of the guide tube, the second outlet port, the air inlet and the first outlet are not smaller than the diameter of the air nozzle pipe.

The method for using the variable wind direction heat gun for electronic information engineering, the specific steps are as follows:

(1). First observe the size of the area that needs to be trimmed and judge the area. When the area ejected from the nozzle tube is too large to meet the requirements, install the variable wind direction component on the nozzle tube;

(2). Adjust the variable wind direction component, rotate the rotary variable wind guide part to a certain angle and then fix it with the push rod, which is used to lock the distance between the air inlet part and the variable wind direction part in the variable wind direction component after the initial adjustment ;

(3). Then, aim the initially adjusted heat gun at the heat conduction plate to further determine its coverage area, and observe whether the area on the heat conduction plate is close to the size of the product to be trimmed. If it is not close, it needs to be adjusted again. If it is close, it will be It can be used, this step realizes the accurate adjustment of the air outlet of the heat gun;

(4). Then turn on the switch of the heat gun body to heat the area of the product to be trimmed.

The heat conduction plate in step (3) includes a plate body, the upper end surface of the plate body is coated with a heat-sensitive color-changing material that can change color with temperature, and longitudinal marking lines arranged along the center are distributed on the plate body and horizontal marking lines, the longitudinal marking lines and the horizontal marking lines are respectively distributed with scale marks, and the circular observation rings arranged on the circumference of the equidistant circle are distributed on the disk body from the center position to the outside, and the disk body is also distributed with Observation slots with radial settings for observing and estimating the area to be repaired.

The principle is: by installing a variable wind direction component on the front end of the traditional heat gun, the air outlet of the air outlet end is adjusted. The adjustment process only needs to manually rotate the air inlet part and the variable wind direction part of the variable wind direction head. Therefore, the first outlet of the air inlet part and the second outlet of the variable wind guide part are dislocated, and the air volume from the variable wind guide part is changed according to the size of the dislocation, so as to meet the special requirements of different temperatures and different air volumes.

In the adjustment process, in order to facilitate the naked eye to observe the coverage of the air volume, this application uses the corresponding assistance for the range of hot air blown out by the induction heat gun. When repairing the components, careful operation is required. If the temperature is too high, the components and the circuit board will be damaged. If the temperature is too low, the components will be soldered. First pre-adjust, then point the adjusted heat gun at the heat conduction plate, check and observe the air volume coverage range, if the range is qualified, it can be used directly, if the range is unqualified, it needs to be further adjusted to avoid damage to components , especially when repairing some high-precision and expensive devices, it is necessary to achieve precise control of the range of hot air, which meets the requirements of use.

The advantages of the present invention are:

The present invention changes the air blowing direction of the original hot air gun through the cooperation between the variable wind direction head and the change direction adjustment assembly, and then achieves the purpose of direction adjustment. The threaded connection method of the pipe is convenient for switching the use state, and the practicability of the product is taken into account on the basis of the innovation of the heat gun.

Description of drawings:

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the variable wind direction head of the present invention.

Fig. 3 is a structural schematic diagram of the direction changing adjustment assembly of the present invention.

Fig. 4 is a schematic structural diagram of the direction changing adjustment assembly in the first embodiment.

Fig. 5 is a structural schematic diagram of the further improved direction changing adjustment assembly in the second embodiment

Fig. 6 is a structural schematic diagram of the heat conduction plate.

Reference signs:

1. Heat gun body; 2. Nozzle tube; 3. Variable wind direction component; 4. Variable wind direction head; 5. Change direction adjustment component; 4-1. Air inlet part; 4-3, force ring; 4-4, first exit; 4-5, second exit; 5-1, installation ring; 5-2, ejector rod; 6, connecting sleeve; 7, force ball; 9 , guide tube; 10, sealing assembly; 10-1, O-ring; 10-2, card slot one; 10-3, card slot two; 11, limit cavity; Bit block; 14, spring; 15, heat conduction plate; 15-1, plate body; 15-2, heat-sensitive color-changing material; 15-3, longitudinal marking line; 15-4, horizontal marking line; 15-5, scale line ; 15-6, annular observation ring; 15-7, observation slot.

Detailed ways:

See attached picture.

Embodiment one:

A variable wind direction hot air gun head for electronic information engineering, including a hot air blower body 1 and an air nozzle tube 2 on the hot air blower body 1, and a variable wind direction component 3 is threadedly connected to the air outlet end of the air nozzle tube 2, which is convenient for later operation replacement and disassembly;

The variable wind direction component 3 includes a variable wind direction head 4 and a variable direction adjustment component 5 matched therewith;

The variable wind direction head 4 includes an air inlet part 4-1, a variable wind direction part 4-2 and a force ring 4-3, the wind inlet part 4-1 and the variable wind direction part 4-2 are spherical, and the variable wind direction The part 4-2 is sleeved on the variable air guide part 4-2 and can rotate coaxially. The air inlet part 4-1 has an air inlet and a first outlet 4-4, wherein the air inlet is threaded with the air nozzle pipe 2, and the variable guide The air part 4-2 has a second outlet 4-5, and the second outlet 4-5 cooperates with the first outlet 4-4 to form an air discharge channel; Set to be relatively movable, so that the air discharge direction of the air discharge channel can be adjusted, and the force ring 4-3 is fixedly sleeved on the outside of the variable wind guide part 4-2;

The direction change adjustment assembly 5 includes a mounting ring 5-1 threadedly connected with the air nozzle pipe 2 and a push rod 5-2 matched with the force ring 4-3, the push rod 5-2 is fixedly installed on the mounting ring 5-1, And it is located near the side of the air inlet part 4-1.

The sum of the axial lengths of the variable wind direction head 4 and the variable direction adjustment assembly 5 is not greater than the length of the air nozzle pipe 2. When the wind direction adjustment is not required, the variable wind direction assembly 3 can be rotated and shrunk to the air nozzle pipe 2 as a whole. , so that the wind direction of the hot air gun blows straight, the force ring 4-3 and the second outlet 4-5 on the variable wind guide part 4-2 are arranged in parallel up and down, so that when the force force ring 4-3 is stressed, it drives the variable guide The wind part 4-2 carries out variable wind direction, and the push rod 5-2 is fixedly installed with a force ball 7 near the end of the force ring 4-3, and the force ring 4-3 is provided with a supply ring along the circumference of the force ring 4-3. The force limiting chamber 11 of the stressed ball 7 increases the force point of the push rod 5-2 through the contact of the limited cavity 11 with the stressed ball 7, making it more convenient and direct to force the force, and changing the wind guide part 4- 2. The end of the second outlet 4-5 is fixedly connected with a guide tube 9, so that the hot air blown from the second outlet 4-5 is more concentrated. The guide tube 9, the end of the second outlet 4-5, the air inlet and the first The diameters of the outlets 4-4 are not smaller than the diameter of the air nozzle pipe 2, so that the variable wind direction assembly 3 can be retracted toward the air nozzle pipe 2 when not in use.

Working principle: drive the ejector rod 5-2 to move towards the force ring 4-3 through the rotation direction change adjustment assembly 5, and continue to move the rotation direction change adjustment assembly 5 when the ejector rod 5-2 contacts the force ring 4-3. The ejector rod 5-2 pushes the stressed ring 4-3, indirectly drives the variable air guide part 4-2 to turn over, thereby changing the blowing direction of the original heat gun's wind direction, and then achieves the purpose of direction adjustment.

Embodiment two:

A heat gun with a variable wind direction for electronic information engineering, comprising a heat gun body 1 and an air nozzle tube 2 on the heat gun body 1, external threads are distributed on the outer circumferential surface of the air outlet end of the air nozzle tube 2, and the threaded connection has The variable wind direction assembly 3; the variable wind direction assembly 3 includes the variable wind direction head 4 and the variable direction adjustment assembly 5 matched therewith; the variable wind direction head 4 includes the air inlet part 4-1, the variable wind direction part 4-2 and the force bearing Ring 4-3, the air inlet part 4-1 has an air inlet and a first outlet 4-4, the variable air guide part 4-2 has a second outlet 4-5, and the second outlet 4-5 matches the first outlet 4- 4 to form an air discharge channel; wherein a fastening structure is adopted between the variable air guide part 4-2 and the air inlet part 4-1, and the variable air guide part 4-2 and the air inlet part 4-1 are set to be relatively movable, The air discharge direction of the air discharge channel is adjustable, and the force ring 4-3 is fixedly sleeved on the outside of the variable air guide part 4-2; the variable direction adjustment assembly 5 includes a mounting ring 5-1 and a The push rod 5-2 matched with the force ring 4-3, the push rod 5-2 is fixedly installed on the installation ring 5-1, and is located near the variable wind direction head 4 side. The sum of the axial lengths of the variable wind direction head 4 and the direction changing adjustment assembly 5 is less than the length of the air nozzle pipe 2 . The air inlet part 4-1 is a spherical structure, one end of the sphere is provided with an air inlet, and the air inlet is connected with a connecting sleeve 6 connected with the air nozzle pipe 2, and the other end of the sphere is provided with a first outlet 4-4, which changes the wind direction. The part 4-2 is a spherical structure that cooperates with the air inlet part 4-1, and it is snap-fitted on the air inlet part 4-1, and its front end is provided with a second outlet 4-5, and the second outlet 4-5 is A guide tube 9 is provided, and the diameters of the first outlet 4-4 and the guide tube 9 are larger than the diameter of the air nozzle tube 2 .

The above-mentioned structure is basically the same as the scheme of Embodiment 1, and the following is a further optimization of its structure on the basis of Implementation 1:

Further, a sealing assembly 10 is provided on the end face of the air inlet part 4-1 and the variable air guide part 4-2, and the sealing assembly 10 includes an O-ring 10-1, and the first outlet 4 of the air inlet part 4-1 The outer peripheral surface of -4 is distributed with a card slot one 10-2, and an O-shaped sealing ring 10-1 is installed in the card slot one 10-2, and the inner peripheral surface of the variable air guide part 4-2 tail is distributed with Draw-in groove two 10-3, also card is equipped with O-ring in the draw-in groove two 10-3. In this embodiment, the structure of the sealing assembly is added, and the gap between them can be sealed without affecting the rotation and adjustment of the air inlet part 4-1 and the variable air guide part 4-2, so as to prevent the hot air from entering the air. Part 4-1 and variable wind guide part 4-2 flow out on the bonding surface, which affects the size of the air volume, and the sealing assembly can play a role in the adjustment between the air inlet part 4-1 and the variable wind guide part 4-2. When a certain friction force is reached, fine-tuning can be realized, which is more conducive to adjustment and indirectly improves the accuracy of adjusting the tuyere.

Further, the force ring 4-3 and the second outlet on the variable wind guide part 4-2 are arranged in parallel up and down, and the inner surface of the force ring 4-3 is welded to the outer circumferential surface of the tail of the variable wind guide part 4-2 On the end surface of the force ring 4-3 facing the direction of the air nozzle tube, there are a plurality of spaced apart circumferentially distributed limiting cavities 11 . Through the structure of the limiting cavity distributed around the circumference, it facilitates the fixing of the ejector rod, so as to realize the fixing of the variable wind guide part after the adjustment of each orientation. Since it is arranged at intervals in the circumferential direction, the length of the ejector rod in the first embodiment is as follows: Although the oblique clamping and fixing can also realize basic fixing, the stability of the oblique clamping and fixing is poor, so there are certain limitations in fixing.

And through the installation method of the ejector rod in the present application, the outside of the installation ring 5-1 is provided with two symmetrically arranged guide installation blocks 12, and the guide installation blocks 12 are guided and installed with the ejector rod 5-2. The end is equipped with a force bearing ball 7 cooperating with the limiting cavity 11, and the rear end of the push rod 5-2 is provided with a limit block 13, and the push rod 5-2 between the limit block 13 and the guide mounting block 12 There is a spring 14 in the sleeve, and its structure can make the ejector rod have a certain adjustment range, so that after the position of the variable wind guide part is determined, it can elastically tighten the ejector rod through the spring, which can hold the ejector rod when it is fixed. , to fine-tune its length so that it can completely match with the limit cavity, and the spring not only plays the role of adjustment, which is convenient to snap in and take off, but also plays the role of top tightening, ensuring the limit card installation stability in the process.

Further, the second outlet end of the variable air guide part 4-2 is fixedly connected with a guide tube 9, and the guide tube 9 is a telescopic structure, which includes a cylinder one, and the outside of the cylinder one is fitted with a cylinder two. Body 2 is screwed on cylinder 1, and the outer surfaces of cylinder 1 and cylinder 2 are provided with axially distributed scale marks; the diameters of the guide tube, the second outlet, the air inlet and the first outlet are not less than The diameter of the nozzle tube. Through the adjustable length structure of the guide tube, it has different degrees of heat accumulation through the adjustment of the length. When a certain temperature is required during the repair process, the length of the guide tube can be adjusted to heat it. Accumulation, enhance the effect of local heat accumulation.

The method of using the variable wind direction heat gun for electronic information engineering, the specific steps are as follows:

(1). First observe the size of the area that needs to be trimmed and judge the area. When the area ejected from the nozzle tube is too large to meet the requirements, install the variable wind direction component on the nozzle tube;

(2). Adjust the variable wind direction component, rotate the rotary variable wind guide part to a certain angle and then fix it with the push rod, which is used to lock the distance between the air inlet part and the variable wind direction part in the variable wind direction component after the initial adjustment ;

(3). Then, aim the initially adjusted heat gun at the heat conduction plate to further determine its coverage area, and observe whether the area on the heat conduction plate is close to the size of the product to be trimmed. If it is not close, it needs to be adjusted again. If it is close, it will be It can be used, this step realizes the accurate adjustment of the air outlet of the heat gun;

(4). Then turn on the switch of the heat gun body to heat the area of the product to be trimmed.

The heat conduction disk 15) in step (3) includes a disk body 15-1, and the upper end surface of the disk body 15-1 is coated with a heat-sensitive color-changing material 15-2 that can change color with temperature changes, and the disk body 15-1 is distributed There are longitudinal marking lines 15-3 and transverse marking lines 15-4 arranged along the center, and scale lines 15-5 are respectively distributed on the longitudinal marking lines 15-3 and transverse marking lines 15-4. There are circular observation rings 15-6 arranged at equal intervals in order outwardly, and radially arranged observation grooves 15-7 for observing and estimating the area to be repaired are also distributed on the disc body. Manually hold a hot air gun to blow hot air on the surface of the disc body. By observing the color change machine on the disc body, you can judge whether the hot air coverage is compared with the area to be repaired, and see whether the tuyere is suitable for use. If the area is too large or Small, it is necessary to adjust the variable wind direction assembly of the air nozzle tube at the front end of the heat gun. In order to facilitate observation and accurate identification, through the structure of the observation slot on the plate body, the plate body can be placed above the area to be repaired first. Observe the groove, the vertical and horizontal marking lines with scale lines and the circular observation ring, roughly observe the area of the area to be repaired, and then adjust the corresponding variable wind direction components until the area of the hot air it sprays can meet the requirements. Requirements are enough, so that it can be applied to the device to be repaired, so as to meet the use requirements.

The above descriptions are only preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the invention shall be included within the scope of protection of the invention.

Claims (9)

1. The utility model provides a variable wind direction hot-blast rifle for electronic information engineering, includes air gun body (1) and air jet nozzle pipe (2) on hot-blast rifle body (1), its characterized in that: external threads are distributed on the outer circumferential surface of the air outlet end of the air nozzle pipe (2), and the air nozzle pipe is in threaded connection with a wind direction variable component (3);

the wind direction variable component (3) comprises a wind direction variable head (4) and a direction-changing adjusting component (5) matched with the wind direction variable head;

the variable wind direction head (4) comprises a wind inlet part (4-1), a direction-changing wind guide part (4-2) and a stress ring (4-3), the wind inlet part (4-1) is provided with an air inlet and a first outlet (4-4), the direction-changing wind guide part (4-2) is provided with a second outlet (4-5), and the second outlet (4-5) is matched with the first outlet (4-4) to form an air discharge channel; the turning air guide part (4-2) and the air inlet part (4-1) are in a buckling structure, the turning air guide part (4-2) and the air inlet part (4-1) are arranged to move relatively, so that the air discharge direction of the air discharge channel is adjustable, and the stress ring (4-3) is fixedly sleeved on the outer side of the turning air guide part (4-2);

the direction-changing adjusting assembly (5) comprises a mounting ring (5-1) in threaded connection with the air nozzle pipe (2) and an ejector rod (5-2) matched with the stress ring (4-3), and the ejector rod (5-2) is fixedly mounted on the mounting ring (5-1) and is positioned close to the variable wind direction head (4);

the outer side of the mounting ring (5-1) is provided with two symmetrically arranged guide mounting blocks (12), the guide mounting blocks (12) are internally provided with ejector rods (5-2) in a guide manner, the end parts of the ejector rods (5-2) are provided with stress balls (7) matched with the upper limiting cavities (11) of the stress rings (4-3), the rear end part of each ejector rod (5-2) is provided with a limiting block (13), and the ejector rod (5-2) between each limiting block (13) and the guide mounting block (12) is sleeved with a spring (14).

2. The variable wind direction heat gun for electronic information engineering according to claim 1, characterized in that: the sum of the axial lengths of the variable wind direction head (4) and the direction-changing adjusting component (5) is less than the length of the air nozzle pipe (2).

3. The variable wind direction heat gun for electronic information engineering according to claim 1, wherein: the air inlet part (4-1) is of a spherical structure, an air inlet is formed in one end of a sphere of the air inlet part, a connecting sleeve (6) connected with the air nozzle pipe (2) is communicated with the air inlet, a first outlet (4-4) is formed in the other end of the sphere, the turning air guide part (4-2) is of a spherical structure matched with the air inlet part (4-1) and is clamped and matched on the air inlet part (4-1), a second outlet (4-5) is formed in the front end of the turning air guide part, a guide cylinder (9) is arranged at the second outlet (4-5), and the diameters of the first outlet (4-4) and the guide cylinder (9) are larger than that of the air nozzle pipe (2).

4. The variable wind direction heat gun for electronic information engineering according to claim 1, characterized in that: the air inlet part (4-1) and the diversion air guide part (4-2) are matched, a sealing assembly (10) is arranged on the end face, matched with each other, of the air inlet part (4-1), the sealing assembly (10) comprises an O-shaped sealing ring (10-1), a first clamping groove (10-2) is distributed on the outer circumferential face of the first outlet (4-4) of the air inlet part (4-1), the O-shaped sealing ring (10-1) is clamped in the first clamping groove (10-2), a second clamping groove (10-3) is distributed on the inner circumferential face of the tail part of the diversion air guide part (4-2), and the O-shaped sealing ring is also clamped in the second clamping groove (10-3).

5. The variable wind direction heat gun for electronic information engineering according to claim 1, wherein: the stress ring (4-3) and a second outlet on the turning air guide part (4-2) are arranged in parallel up and down, the inner side face of the stress ring (4-3) is welded on the outer circumferential face of the tail part of the turning air guide part (4-2), and a plurality of circumferentially distributed limiting cavities (11) are distributed on the end face of the stress ring (4-3) facing the air nozzle pipe direction at intervals.

6. The variable wind direction heat gun for electronic information engineering according to claim 5, characterized in that: the second outlet end of the turning air guide part (4-2) is fixedly connected with a guide cylinder (9), the guide cylinder (9) is of a telescopic structure and comprises a cylinder body I, a cylinder body II is sleeved on the outer side of the cylinder body I, the cylinder body II is screwed on the cylinder body I, and the outer surfaces of the cylinder body I and the cylinder body II are respectively provided with axially distributed scale marks.

7. The variable wind direction heat gun for electronic information engineering according to claim 6, wherein: the diameters of the guide cylinder, the second outlet, the air inlet and the first outlet are not smaller than the diameter of the air nozzle pipe.

8. The use method of the variable wind direction heat gun for the electronic information engineering based on any one of claims 1 to 7 is characterized by comprising the following specific steps:

(1) Firstly, observing the size of an area needing to be finished of a product, judging the area, and mounting the variable wind direction assembly on the air nozzle pipe when the area sprayed by the air nozzle pipe is too large to meet the requirement;

(2) Adjusting the variable wind direction component, rotating the rotary diversion wind guide part by a certain angle, and then fixing the rotary diversion wind guide part through a mandril, so as to lock the distance between the wind inlet part and the diversion wind guide part in the initially adjusted variable wind direction component;

(3) Then, the coverage area of the heat conducting disc is further determined by aligning the primarily adjusted hot air gun with the heat conducting disc, whether the area on the heat conducting disc is close to the area to be finished of the product or not is observed, if the area on the heat conducting disc is not close, the area needs to be adjusted again, and if the area is close, the area can be used, and the step realizes accurate adjustment of the air outlet size of the hot air gun;

(4) And then, opening a switch of the hot air gun body, and heating the product area to be trimmed.

9. The method for using the variable wind direction heat gun for electronic information engineering according to claim 8, wherein: the heat conducting disc (15) in the step (3) comprises a disc body (15-1), wherein a thermosensitive color-changing material (15-2) capable of changing color along with temperature change is coated on the upper end face of the disc body (15-1), a longitudinal marking line (15-3) and a transverse marking line (15-4) which are arranged along the center are distributed on the disc body (15-1), scale marks (15-5) are respectively distributed on the longitudinal marking line (15-3) and the transverse marking line (15-4), annular observation rings (15-6) which are circumferentially arranged at equal intervals are sequentially distributed on the disc body from the center outwards, and observation grooves (15-7) which are radially arranged and used for observing and estimating an area to be repaired are also distributed on the disc body.

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