CN217131523U - Hot air gun core and hot air gun with same - Google Patents

Abstract

The utility model relates to a core body and a hot air gun with the core body, wherein, the core body comprises a base, a plurality of brackets and a heating wire which are arranged on the base; the support includes along fore-stock and the after-poppet of base axial setting, and the after-poppet is equipped with the wind-guiding passageway that the axial runs through, and the wind-guiding passageway is equipped with the exit end that extends to at least one side of fore-stock, and this exit end sets up with the heating wire relatively. The air flow passing through the core body is divided into two parts, the first part of air flow flows along the outer ring of the core body, the second part of air flow is directly blown to the heating wire wound at the front end from the air guide channel after being sucked into the shell, the second part of air flow with lower temperature is mixed with the first part of air flow with higher temperature, heat accumulation is avoided, the temperature of the heating wire at the front end is too high, the integral temperature of the core body is more uniform, on one hand, the utilization rate of the heat energy of the heating wire is improved, the output power is ensured, on the other hand, the uniform distribution of the core body temperature is realized, and the integral service life of the heating wire is greatly prolonged.

Description

Hot air gun core and hot air gun with same

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electric tool field, in particular to hot-blast rifle core and have hot-blast rifle of this core.

[ background of the invention ]

The heat gun is an electric tool which generates high temperature from a heating core and blows out high temperature air flow through a fan assembly to heat the components. The core body generally comprises a base formed by splicing a plurality of insulating plates, an electric heating wire wound on the base and a bracket arranged in a space surrounded by the adjacent insulating plates and the electric heating wire; and winding notches for embedding the heating wires are arranged on the outer side surfaces of the base and the support.

Because the high-temperature air flow generated in the hot air gun flows from back to front, cold air is input from one end, is continuously heated in the process and is output from the other end, and the heat of the core body is taken out to form hot air. The heat progressively increases progressively and accumulates along with the number of turns of heating wire, and this leads to the heating wire of front end to be heated and is greater than the heating wire of rear end far away, and then makes the easy thermal fatigue of heating wire of front end and damage, shortens life.

With the development of industry, the output power of the heat gun is getting larger and larger, and there is a need to provide an improved heat gun to overcome the defects of the prior art.

[ Utility model ] content

To prior art not enough, the utility model aims to provide a promote hot-blast rifle core of security and reliability and have the hot-blast rifle of this core.

The utility model provides a prior art problem can adopt following technical scheme: a core body of a hot air gun comprises a base, a plurality of supports and an electric heating wire, wherein the supports and the electric heating wire are arranged on the base; the support includes along fore-stock and after-poppet that the base axial set up, the after-poppet is equipped with the wind-guiding passageway that the axial runs through, just the wind-guiding passageway is equipped with and extends to the exit end of at least one side of fore-stock, this exit end with the heating wire sets up relatively.

The further improvement scheme is as follows: the rear bracket is provided with an axial through hole, the through hole forms the air guide channel, and the front bracket part shields the through hole so that the outlet end of the air guide channel is opened towards two sides.

The further improvement scheme is as follows: the front support and the rear support are connected in a wedge-shaped structure, and the tip of the wedge-shaped structure is collinear with the middle dividing line of the through hole.

The further improvement scheme is as follows: the wedge-shaped structure is provided with two air guide inclined planes which are oppositely arranged on two side walls of the front support, and the air guide inclined planes are curved surfaces.

The further improvement scheme is as follows: the projection shape of the wind guide inclined plane on the axial direction of the front support is a cone, and the small end of the cone deviates from the rear support.

The further improvement scheme is as follows: the small end of the cone extends to the lower part of the last ring of the electric heating wire wound on the front bracket.

The further improvement scheme is as follows: one end of the front bracket, which is far away from the rear bracket, is provided with a guide part, the guide part is obliquely arranged on the side wall of the front bracket, and the guide part extends from the upper end side of the front bracket to the front end side of the front bracket.

The further improvement scheme is as follows: one end of the air guide channel, which is far away from the front support, forms an airflow inlet, and the diameter of the airflow inlet is larger than that of the air guide channel.

The further improvement scheme is as follows: the base and the support both comprise a plurality of carrying parts which protrude outwards along the radial direction, the end faces of the carrying parts are recessed inwards to form a plurality of winding notches which are arranged at intervals and are used for embedding the heating wires, and the protruding heights of the carrying parts are different.

The utility model also provides a hot air gun, which is provided with a shell for accommodating the core body of the hot air gun and a motor arranged in the shell; the base is fixed on the shell, and the rear support is located between the motor and the front support.

Compared with the prior art, the utility model discloses following beneficial effect has: the air flow passing through the core body is divided into two parts, the first part of air flow flows along the outer ring of the core body, the second part of air flow is directly blown to the heating wire wound at the front end from the air guide channel after being sucked into the shell, the second part of air flow with lower temperature is mixed with the first part of air flow with higher temperature, heat accumulation is avoided, the temperature of the heating wire at the front end is too high, the integral temperature of the core body is more uniform, on one hand, the utilization rate of the heat energy of the heating wire is improved, the output power is ensured, on the other hand, the uniform distribution of the core body temperature is realized, and the integral service life of the heating wire is greatly prolonged.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

FIG. 1 is a schematic view of a heat gun core according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the stent;

FIG. 3 is a schematic view of the bracket from another perspective;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 shows a cross-sectional view of FIG. 3;

FIG. 7 shows an assembled view of the bracket;

fig. 8 is a schematic view of the heat gun.

The meaning of the reference symbols in the figures:

1. core 11, base 2, support

21. Front bracket 211, wind guide inclined plane 212 and small end

213. Guide section 22, rear bracket 221, and air guide passage

222. Airflow inlet 223, air outlet gap 3 and heating wire

4. Receiving part 41, winding notch 5, casing

51. Air outlet 6, motor element 7, fan element

8. Holding part 9, air duct

[ detailed description ] embodiments

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3 and 7, a heat gun core 1 according to a preferred embodiment of the present invention includes a base 11 formed by splicing a plurality of insulating plates and a bracket 2 disposed between adjacent insulating plates. The base 11 is preferably made of mica plate or ceramic material, and the support 2 is preferably made of ceramic material, so that the advantages of good insulation and heat resistance are achieved. The inboard interconnect of polylith insulation board constitutes base 11 for base 11 forms a plurality of accommodation spaces of even size in the circumferencial direction, and every accommodation space corresponds sets up a support 2. For example, when the base 11 is spliced by 3 insulating plates, the base 11 forms a Y-shaped cross section and has an accommodating space for installing 3 supports; when the base 11 is spliced by 4 insulating plates, the base 11 forms a cross-shaped cross section and is provided with an accommodating space capable of being provided with 4 supports. The number of the insulating plates is set according to actual needs as long as the insulating plates can ensure structural strength, and is not described in detail herein for purposes of space limitation.

The electric heating wire 3 is spirally wound on the base 11 and the bracket 2, and can generate heat when being electrified. When the electric heating air gun works, the motor assembly 6 in the hot air gun drives the fan assembly 7 to rotate so as to suck external air flow into the machine shell 5 from the air inlet, and when the air flow passes through the core body 1, the heat generated by continuous heating of the electric heating wire 3 is carried and is discharged from the air outlet 51 to form hot air. Among the prior art, the heat distribution of hot-blast rifle core progressively increases progressively forward and accumulates from the heating wire initiating terminal to the heating wire end along with the increase of heating wire number of turns, and the heating wire of front end is heated and is greater than the heating wire of rear end far away, leads to the easy thermal fatigue of heating wire of front end and damages, shortens life. Based on overcoming the above-mentioned defect, in the preferred embodiment of the present invention, the support 2 comprises a front support 21 and a rear support 22 axially disposed along the base 11, and the meaning of "front and rear" means that when the user holds the heat gun, the direction of the air flow sucked into the heat gun is rear, and the direction of the air flow discharged after being heated by the heat gun is front. Referring to fig. 5 and 6, the rear bracket 22 is a hollow structure having an axial through hole to form an air guide channel 221; the air guide passage 221 is provided with an outlet end extending to at least one side of the front supporter 21, the outlet end is disposed opposite to the heating wires 3, and the air current flowing through the core body 1 simultaneously passes through the air guide passage 221 and the outer side of the rear supporter 22 and blows toward the heating wires disposed opposite to the outlet end of the air guide passage 221, so as to prevent heat accumulation. Specifically, the front bracket 21 is connected to the front end of the rear bracket 22 and partially covers the through hole, and the outlet end of the air guide passage 221 is opened to both sides. When the hot air gun works, the air flow flowing through the core body 1 is divided into two parts: the first part of the air flow flows along the outer circle of the core 1, carries heat from the starting end of the heating wire on the rear bracket 22 to the tail end of the heating wire on the front bracket 21, and is exhausted from the air outlet 51. The second part of air current is from air guide channel 221 direct flow direction around establishing the heating wire on fore-stock 21 through air-out clearance 223 after inhaling casing 5, and the lower second part of air current of temperature mixes here with the higher first part of air current of temperature promptly, avoids the heat to pile up and causes the front end electric wire high temperature for the holistic temperature of core 1 is more even, thereby prolongs the whole life-span of heating wire 3.

As an embodiment, the ratio of the number of turns of the heating wire wound on the rear supporter 22 to the number of turns of the heating wire wound on the front supporter 21 is 4: 3, the number of turns of the heating wire of the rear bracket 22 is more to ensure the heating power, the number of turns of the heating wire of the front bracket 21 is relatively less, and the service life is considered, so that the whole core body 1 is balanced with the heating power and the service life. It should be noted that the utility model discloses do not do specific restriction to the number of turns of heating wire 3, can adjust as required adaptability in the practical application.

In the preferred embodiment of the present invention, the connection between the front bracket 21 and the rear bracket 22 is wedge-shaped. The wedge structure divides the outlet end of the air guiding channel 221 into at least two air outlet gaps 223. Specifically, the rear end of the front support 21 is connected with the front end of the rear support 22, two air guide inclined planes 211 symmetrically arranged are arranged on the left side surface and the right side surface of the rear end of the front support 21, the air guide inclined planes 211 are further set to be curved surfaces, the projection shape of the air guide inclined planes 211 on the side surface of the front support 21 is a cone, and a small end 212 of the cone deviates from the rear support 22 and extends to the position below the last circle of heating wires wound on the front support 21. The connecting part of the front bracket 21 and the rear bracket 22 is arranged to be a wedge-shaped structure with a conical air guide slope, so that a good guiding effect is formed on the air flow, the flow of the air flow is accelerated, and the mixing of the first part of air flow and the second part of air flow is facilitated. The utility model discloses in further embodiment, the most advanced of wedge structure and the well midline collineation of perforating hole separate the exit end of wind-guiding passageway for two the same size air-out clearances 223, make the amount of wind that two air-out clearances 223 come out the same to guarantee the heat evenly distributed of fore-stock 21 week side.

As an embodiment, referring to fig. 2, 3 and 4, a side wall of one end of the front bracket 21 away from the rear bracket 22 is provided with a guide portion 213, the guide portion 213 is disposed obliquely with respect to the front bracket 21, and the guide portion 213 extends from an upper end side of the front bracket 21 toward a front end side. With this arrangement, the airflow is blown away from the front bracket 21 through the guide portion 213, the airflow flows more smoothly on the front bracket 21, and the heat dissipation performance of the core 1 is improved. In the present embodiment, the inclination angle of the guide portion 213 with respect to the front bracket 21 is 10 degrees. The projections of the air guide inclined plane 211 and the guide part 213 in the axial direction of the front bracket 21 are at least partially intersected, and the airflow flowing speed is improved.

In the preferred embodiment of the present invention, the base 11 is formed by splicing 4 insulating plates at 90 degrees to form a cross shape, and the four supports 2 are respectively accommodated in four accommodating spaces formed by splicing the insulating plates. The support 2 comprises a front support 21 and a rear support 22 which are arranged along the axial direction, a positioning seat which is arranged along the radial direction and a bearing part 4 which protrudes outwards from the surface of the positioning seat, wherein the end surface of the bearing part 4 is inwards sunken to form a plurality of winding gaps 41 for embedding the heating wires 3. The cross section of the positioning seat of the rear bracket 22 is fan-shaped, and the positioning seat is provided with two side walls arranged at an acute angle and an arc-shaped top wall connecting the two side walls, and a space formed by the two side walls and the arc-shaped top wall in a surrounding manner forms an air guide channel 221. The included angle between the two side walls is preferably 85 degrees-90 degrees, so that the positioning seat is prevented from moving after being assembled in the accommodating space, more firm fixation is achieved, and the assembling stability is improved. The plurality of carrying parts 4 protrude outwards from the arc top wall of the positioning seat, and the protruding heights of the plurality of carrying parts 4 are different, so that the air flow circulation is improved, and the heat dissipation performance of the core body 1 is improved.

As an embodiment, referring to fig. 4, 5 and 6, an end of the air guiding channel 221 away from the front bracket 21 forms an air inlet 222, and an inner diameter of the air inlet 222 is larger than an inner diameter of the air guiding channel 221, so as to increase an intake air amount entering the air guiding channel 221. Meanwhile, the outer diameter of the airflow inlet 222 is also set to be larger than that of the air guide channel 221, so that the assembly stability is further improved.

Referring to fig. 8, the embodiment of the present invention further relates to a heat gun having the above core, which includes a housing 5, a motor assembly 6 installed in the housing 5, a fan assembly 7 driven by the motor assembly 6, a core 1 disposed at the front end of the housing 5, a holding portion 8 extending downward from the lower end of the housing 5, a control assembly installed in the holding portion, and a switch assembly installed on the holding portion 8. The motor assembly 6 is positioned at the rear end of the shell 5, the core 1 is arranged inside the front end of the shell 5, and the fan assembly 7 is positioned between the motor assembly 6 and the core 1; the holding part 8 is positioned at the end part of the shell 5 close to the motor assembly 6 side, and the motor assembly 6, the core body 1 and the switch assembly are all electrically connected with the control assembly. When the electric heating air heater is in actual use, a user presses the switch assembly to start the motor assembly 6 and drive the fan assembly 7 to rotate, the fan assembly 7 rotates at a high speed, and meanwhile, heat generated by the core body 1 is carried by air flow and blown out of the hot air gun, and heating operation is carried out on elements.

In the preferred embodiment of the present invention, the housing 5 includes an air inlet at the rear end and an air outlet 51 at the front end of the core 1, and the motor assembly 6 drives the fan assembly 7 to rotate so as to suck the external air into the housing through the air inlet and discharge the heat generated by the core 1 from the air outlet 51.

The heat gun further comprises a protective part (not shown in the figure) arranged at the front side of the holding part 8, the protective part is connected between the bottom of the holding part 8 and the lower end of the casing 5, the protective part, the casing 5 and the holding part 8 enclose a holding area for accommodating the fingers of a user, and the protective part can prevent the user from being scalded due to the fact that the user directly touches the part of the casing where the core body is arranged when the heat gun is used.

In one embodiment, the housing 5 includes a heat dissipation opening (not shown) at the front end, the heat dissipation opening corresponds to the position of the core 1, and the heat dissipation opening is spaced apart from the heating wire 3 to further prevent the user from being scalded.

The hot air gun also comprises an air duct 9 sleeved on the periphery of the electric heating wire 3, the fan component 7 comprises a fan blade connected with the motor component 6 and a current-shooting cover for accommodating the fan blade, the air duct 9 is connected with the current-shooting cover, and airflow generated by the fan blade flows between the current-shooting cover and the air duct 9 so as to reduce the loss of air quantity.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A core body of a hot air gun comprises a base, a plurality of supports and an electric heating wire, wherein the supports and the electric heating wire are arranged on the base; the method is characterized in that: the support includes along fore-stock and after-poppet that the base axial set up, the after-poppet is equipped with the wind-guiding passageway that the axial runs through, just the wind-guiding passageway is equipped with and extends to the exit end of at least one side of fore-stock, this exit end with the heating wire sets up relatively.

2. The heat gun core of claim 1, wherein: the rear bracket is provided with an axial through hole, the through hole forms the air guide channel, and the front bracket part shields the through hole so that the outlet end of the air guide channel is opened towards two sides.

3. The heat gun core of claim 2, wherein: the front support and the rear support are connected in a wedge-shaped structure, and the tip of the wedge-shaped structure is collinear with the middle dividing line of the through hole.

4. A heat gun core according to claim 3, wherein: the wedge-shaped structure is provided with two air guide inclined planes which are oppositely arranged on two side walls of the front support, and the air guide inclined planes are curved surfaces.

5. The heat gun core of claim 4, wherein: the projection shape of the wind guide inclined plane on the axial direction of the front support is a cone, and the small end of the cone deviates from the rear support.

6. The heat gun core of claim 5, wherein: the small end of the cone extends to the lower part of the last ring of the electric heating wire wound on the front bracket.

7. The heat gun core of claim 1, wherein: one end of the front bracket, which is far away from the rear bracket, is provided with a guide part, the guide part is obliquely arranged on the side wall of the front bracket, and the guide part extends from the upper end side of the front bracket to the front end side of the front bracket.

8. The heat gun core of claim 1, wherein: one end of the air guide channel, which is far away from the front support, forms an airflow inlet, and the diameter of the airflow inlet is larger than that of the air guide channel.

9. The heat gun core of claim 1, wherein: the base and the support both comprise a plurality of carrying parts which protrude outwards along the radial direction, the end faces of the carrying parts are recessed inwards to form a plurality of winding notches which are arranged at intervals and are used for embedding the heating wires, and the protruding heights of the carrying parts are different.

10. A hot air gun is provided with a shell for accommodating a core body of the hot air gun and a motor arranged in the shell; the method is characterized in that: a heat gun core according to any of claims 1 to 9, wherein said base is held on said casing, said rear bracket being located between said motor and said front bracket.

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