CN201096410Y

CN201096410Y - Hot-blast gun heat insulation sheath structure

Info

Publication number: CN201096410Y
Application number: CNU2007201754656U
Authority: CN
Inventors: 郑传兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-28
Filing date: 2007-08-28
Publication date: 2008-08-06
Anticipated expiration: 2017-08-28

Abstract

The utility model relates to a heat insulation sheath structure of a heat gun, which comprises a shell body as well as a sheath, a thermal resistance component and a fan motor set arranged in the shell body, wherein, the sheath is similar to a tapered cylinder and is positioned at the front end of the shell body, one end thereof is an opening part, and the other end thereof has a drum body part, an annular end part is extended from the periphery of the drum body part, the annular end part is combined with a caulking groove on the inner wall surface of the shell body, and a gradation face is disposed between the opening part and the drum body part, and the gradation face is provided with a plurality of through holes; and the sheath can provide the airflow gap with the shell body and reduce the contact temperature in the gap by leveraging the above characteristics, and when stopping using the sheath, the sheath drum body part which is a relative low temperature area and has a certain heat capacity volume can be further used to realize better heat dispersion and prevention to reheating, thereby protecting the fan motor set and inside electronic circuits.

Description

The heat shield structure of heat gun

Technical field

The utility model is about a kind of heat shield structure of heat gun; especially refer to a kind of heat gun with heat shield; and through the tubular body of this sheath and some through holes of setting; effectively reduce contacting temperature and preventing heating the effect of rising again of sheath and housing, to promote safety in utilization and protection its fan motor group and internal electronics.

Background technology

Known, at present in the construction or the process operation of various industrial and hydroelectric projects etc., as divest paint, local desiccation, heat-shrinkable T bush, the heat shrink films packing, thermosol is softening, the curved plastic tube etc. of bending, also or the production of electronic goods, maintenance, communication, the sound appliances maintenance, SMD surface mount part sealing-off etc., all be that the high-temperature hot-air that sees through the heat gun generation is constructed or operation, composition structure and hot isolation design at heat gun, with the use of direct reaction heat air pressure gun and user's safety, so have good structure and heat to isolate and the safety design, will improve the safety and the service life of using.

Known heat gun 1, as shown in Figure 1, its structure mainly comprises the external shell 10 that a thermoplasticity material is made, cooperate ring rib 11 or becket 12 to establish the interior pipe 13 of a metal material moulding with group in the external shell 10, interior pipe 13 hollow inside are provided with the thermal resistance assembly 14 of high impedance, and to produce thermal source, interior pipe 13 1 ends have the fan motor group 15 of circuit board in conjunction with one, produce distinguished and admirable inside pipe 13 inside and thermal resistance assembly 14 and blow, make the thermal source of generation blow out hot blast stream by interior pipe 13 other ends.

Above-mentioned known heat gun 1, the high heat of the generation that this thermal resistance assembly 14 will continue when starting, even can reach more than 500 degree Celsius, and the interior pipe 13 that this high temperature will continue and directly heat is transmitted to metal procedure, in other words, pipe also is created in the condition of high temperature in making under lasting high heat is transmitted, and distinguished and admirable 13 inside of only internally managing that fan motor group 15 produces blow, to make the continuous rising of heat gun internal temperature lack heat sinking function again, lasting high temperature also may cause external shell 10 that the thermoplasticity material makes to produce hot melts and cause safety problem to the user.

Moreover, the elevated operating temperature of heat gun 1, the productive set high temperature that pipe continues in making, even even behind heat gun 1 power-off, stop the action of thermal resistance assembly 14 and fan motor 15, owing to manage the still remaining quite high thermal energy that has in thermal resistance assembly 14 reaches, will be because of not being subjected to the distinguished and admirable accumulation rapidly that blows, also may exceed operating temperature, and produce the what is called phenomenon of rising again, still may directly cause the hot melt of external shell 10 to destroy, even can heat be passed to fan motor group 15 and cause its circuit board or motor to damage.

In addition, announce " the safety shield structural improvement of pipe in the heat gun " novel patent case No. 479914 as the TaiWan, China of being applied for before this case applicant, itself and aforementioned mechanism shown in Figure 1 are roughly the same, institute's demand emphasis is the interior pipe 13 outside sheathed sheaths 16 at heat gun 1, and interior pipe 13 fixedly is mounted on this housing 10 inside (seeing also Fig. 2), this sheath 16, form some salient points 17 in its inner face, and this salient point 17 just can with the mutual contact of perisporium outer rim of interior pipe 13, and make the side face of sheath 16 and 13 of interior pipes make somebody a mere figurehead isolation one suitable spacings, pipe 13 peripheries in again these sheath 16 bundles being located at, and it location is located in presumptive address in the housing 10, by 16 designs of above-mentioned sheath, cooperate the distinguished and admirable of fan motor 15 to blow synchronously in the pipe outside, the internal heat dissipating that forms heat gun 1 is with pipe heat energy in reducing, and the point that sees through sheath 16 and interior pipe 13 connects to sentence and reduce heat and be delivered to housing 10, to obtain preferable high temperature safe protection.

But the said structure design, though manage the fuel factor that 13 high temperature are passed to housing 10 in can reducing, when permanent the use, still have the heat transmission of continuation therebetween and cause the too high anxiety of contact temperature, in addition when heat gun 1 is stopped using, the temperature-rise effect that residual heat forms still has the space of improvement.

The utility model content

The main purpose that this is novel, be to provide a kind of heat shield structure of heat gun, wherein simplify by internal structure, reduce the contact area of its thermal resistance assembly and sheath, and see through sheath with through hole and tubular body, and effectively reduce it and contact temperature and lifting with housing and rise again and prevent making usefulness, reach and reduce cost, be convenient to assembling, simultaneously the purpose of the preferable safety in utilization of tool.

For reaching above-mentioned purpose, the heat shield structure of a kind of heat gun of the utility model, include: a housing, and be installed in sheath, thermal resistance assembly and the fan motor group of enclosure interior, wherein, this sheath is positioned the housing front end, it is a conical shell, one end has the peristome of the receipts of holding back, the other end has the barrel of an extrapolation, and the barrel periphery extends a ring end, ring end and the combination of above-mentioned inner walls face, and be provided with class's face between this peristome and barrel, class's face is provided with some through holes.

Wherein, between peristome and class's face, being provided with a guide lug, pulls in the guide lug inner face in thermal resistance assembly one end top, and the draw-in groove of the other end and housing inner face is in conjunction with the location.

Wherein, the inner walls face is provided with a caulking groove.

See through technique scheme; the utility model can effectively reduce the time cost of production; and improvement by this sheath; further effectively reduce itself and the temperature that contacts of housing; prevent housing Yin Gaowen and hot melt, and the peripheral side face of sheath barrel is relative low-temperature region and the thermal-arrest space that forms a constant volume, when heat gun quits work; can form the heat anti-system of rising again, with protection fan motor group and internal electronics.

Description of drawings

Fig. 1 is the combination of known heat gun and uses schematic diagram.

Fig. 2 is No. 479914 patent case combination stereogram of bulletin.

Fig. 3 is a three-dimensional exploded view of the present utility model.

Fig. 4 is the combination schematic diagram of sheath of the present utility model and thermal resistance assembly.

Fig. 5 analyses and observe and air-flow trend schematic diagram for combination of the present utility model.

The primary clustering symbol description

One, known part:

1 heat gun, 14 thermal resistance assemblies

10 external shells, 15 fan motor groups

11 ring ribs, 16 sheaths

12 beckets, 17 salient points

Pipe in 13

Two, the utility model part:

2 housings, 34 class's faces

21 caulking grooves, 35 through holes

22 draw-in grooves, 36 guide lugs

3 sheaths, 4 thermal resistance assemblies

31 peristomes, 41 thermal insulation barriers

32 barrels, 42 heat generating members

33 ring ends, 5 fan motor groups

The specific embodiment

Head sees also shown in Fig. 3～5, the heat shield structure of a kind of heat gun of the utility model, include a housing 2, housing 2 inside have accommodation space, sheath 3 is installed in regular turn, thermal resistance assembly 4 and fan motor group 5, wherein this sheath 3 is positioned housing 2 front ends, it slightly is a conical shell, one end has the peristome 31 of the receipts of holding back, the other end has the barrel 32 of an extrapolation, and barrel 32 peripheral side faces form the thermal-arrest space of a constant volume, and its root edge extends a ring end 33, caulking groove 21 combinations of ring end 33 and above-mentioned housing 2 internal faces, and be provided with class's face 34 between this peristome 31 and barrel 32, class's face 34 is provided with some through

holes

35,34 in peristome 31 and class's face, being provided with a guide lug 36, pulls in guide lug 36 inner faces (with reference to figure 4 in the end top of thermal resistance assembly 4,5).

This thermal resistance assembly 4 comprises the thermal insulation barriers 41 of a round and is located at the heat generating member 42 of thermal insulation barriers 41, pulls in guide lug 36 inner faces of sheath 3 in thermal resistance assembly 4 one ends top, and the draw-in groove 22 of the other end and inner walls is in conjunction with the location.

This fan motor group 5; be located on the housing 2 of thermal resistance assembly 4 rear ends; control its keying by electronic circuit (figure does not show); fan motor group 5 running turn windblast thermal resistance assemblies 4; air-flow by heat generating member 42 outwards blows out through the peristome 31 of heating by sheath 3; and fan motor group 5 is revolved the part air-flow that send; the barrel 32 and the via through holes 35 that blow to sheath 3 through thermal insulation barriers 41 peripheries are sent; make barrel 32 reduce surface temperature; some through holes 35 on certain class face 34; be that the heat-conducting area that impels the high temperature of sheath 3 openends 31 to be passed to barrel 32 reduces; comprehensive above-mentioned two kinds of thermal conduction characteristics make barrel 32 temperature rises slow, but rapid heat dissipation; to reach the temperature that contacts that reduces ring end 33 and housing 2, protect safe in utilization.

Moreover, when heat gun is stopped using, basically the barrel 32 of sheath 3 is relative low-temperature region, and the thermal-arrest space with a constant volume, the heat of peristome 31 or thermal resistance assembly 4 is passed to barrel 32, the temperature drop gradient of utilizing barrel 32 lower temperature to form, thermal-arrest space with a constant volume, make this heat can be reduced to safe range fast, see through barrel 32 peripheral areas heat radiations simultaneously, reach the rise again usefulness of anti-system of heat.

Claims

1, a kind of heat shield structure of heat gun, include: a housing, and be installed in sheath, thermal resistance assembly and the fan motor group of enclosure interior, and it is characterized in that: this sheath is positioned the housing front end, and it is a conical shell, one end has the peristome of the receipts of holding back, the other end has the barrel of an extrapolation, and the barrel periphery extends a ring end, ring end and the combination of above-mentioned inner walls face, and be provided with class's face between this peristome and barrel, class's face is provided with some through holes.

2, the heat shield structure of heat gun as claimed in claim 1 is characterized in that: wherein between the peristome of sheath and class's face, being provided with a guide lug, pulls in the guide lug inner face in the end top of thermal resistance assembly.

3, the heat shield structure of heat gun as claimed in claim 1, it is characterized in that: its middle shell more comprises: be provided with a caulking groove in inner wall surface thereof, locate with the ring end embedding group that sheath is provided.

4, the heat shield structure of heat gun as claimed in claim 1 or 2, it is characterized in that: wherein this sheath more comprises: the peripheral side face of its barrel forms the thermal-arrest space of a constant volume.

5, the heat shield structure of heat gun as claimed in claim 1 is characterized in that: wherein pull in the sheath inner face in thermal resistance assembly one end top, and the draw-in groove of the other end and inner walls is in conjunction with the location.

6, as the heat shield structure of claim 1 or 5 described heat guns, it is characterized in that: wherein the thermal resistance assembly comprises the thermal insulation barriers and the heat generating member of being located at thermal insulation barriers inside of a round.