CN219703743U

CN219703743U - Welding heating device

Info

Publication number: CN219703743U
Application number: CN202321313050.6U
Authority: CN
Inventors: 凌光霞; 裴涛
Original assignee: Suzhou Luyuan Intelligent Equipment Co ltd
Current assignee: Suzhou Luyuan Intelligent Equipment Co ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-09-19
Anticipated expiration: 2033-05-26

Abstract

The utility model discloses a welding heating device, which comprises a shell, a heating assembly and a fan assembly, wherein a heating cavity and an air outlet cavity are formed in the shell and are mutually separated, the air outlet cavity is positioned above the heating cavity, an outer rectifying plate and an air return plate are arranged at the top end of the shell, a plurality of air outlets are uniformly distributed on the outer rectifying plate and are communicated with the air outlet cavity, a plurality of air return openings are uniformly distributed on the air return plate and are communicated with the heating cavity, the heating assembly is arranged at the top part in the heating cavity, the fan assembly comprises an air guide volute, a driving motor and a wind wheel, the air guide volute is arranged in the heating cavity, a volute channel is arranged in the air guide volute, an inlet and an outlet are formed in the air guide volute, the inlet is respectively communicated with the volute channel and the heating cavity, and the outlet is respectively communicated with the volute channel and the air outlet cavity. The utility model can ensure the welding quality.

Description

Welding heating device

Technical Field

The utility model relates to the field of reflow soldering equipment, in particular to a soldering heating device.

Background

In the field of circuit board component welding processing, reflow soldering equipment is generally used for welding components.

The welding heating device of the existing reflow soldering equipment generally comprises a shell, a heating assembly and a fan, wherein the heating assembly is arranged in a heating cavity of the shell, a driving motor of the fan is arranged at the bottom end of the shell, a wind wheel of the fan is arranged in the heating cavity of the shell, when the device is in practical application, the wind wheel is driven to rotate by the driving motor, gas (such as air or nitrogen) enters the heating cavity of the shell from an air inlet of the shell under the rotation driving of the wind wheel, and is heated by the heating assembly and then blown out to a soldering surface of a PCB (printed circuit board) through a rectifying plate at the top end of the shell, so that soldering paste on the soldering surface of the PCB is heated, and soldering paste on the soldering surface of the PCB is melted, so that electronic components and the PCB are soldered together. In this kind of structure, because gas enters into the heating intracavity earlier, then heats through heating element, then blows out from the rectifying plate on casing top, heating element can play certain barrier effect to gas, blows out the speed of gas on the welded surface of PCB board like this and has the difference for the welded surface of PCB board can produce the difference in temperature, thereby makes the solder paste on the welded surface of PCB board can not thoroughly melt, thereby electronic components can not weld firmly with the PCB board, has influenced welded quality.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a welding heating device which can ensure the welding quality.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a welding heating device, includes casing, heating element and fan subassembly, the inside of casing has heating chamber and the air-out chamber of mutual partition, the air-out chamber is located the top in heating chamber, the top of casing is equipped with outer rectification board and return air board, evenly distributed has a plurality of air outlets on the outer rectification board, a plurality of air outlets all with the air-out chamber intercommunication, evenly distributed has a plurality of return air inlets on the return air board, a plurality of return air inlets all with the heating chamber intercommunication, heating element sets up the top in the heating chamber, the fan subassembly includes wind scooper spiral case, driving motor and wind wheel, the wind scooper sets up in the heating chamber, the inside of wind scooper spiral case has the spiral case passageway, be equipped with entry and export on the wind scooper spiral case, the entry respectively with spiral case passageway, air-out chamber intercommunication, driving motor sets up the bottom of casing, the wind wheel sets up in the motor shaft passageway, the driving motor end stretch into spiral case passageway and drive wind wheel and be used for rotating relatively the wind wheel.

As a preferable technical scheme, the number of the outlets is two, the inlet is positioned between the two outlets and corresponds to the center of the air outlet cavity, the volute channel comprises a first channel and two second channels which are respectively communicated with the first channel, the inlet is communicated with the first channel, and the two outlets are respectively communicated with the two second channels.

As an optimized technical scheme, the air guiding volute comprises a volute part and two volute tongues formed on two sides of the volute part, the volute part is arranged at the bottom of the heating cavity, the top end of the volute part is provided with an inlet, the inside of the volute part is provided with a first channel, the wind wheel is arranged in the first channel, the inside of the two volute tongues is respectively provided with two second channels, the top of the heating cavity is provided with two mounting holes communicated with the air outlet cavity, and one ends, far away from the volute part, of the two volute tongues are respectively arranged in the two mounting holes and are respectively provided with two outlets.

As a preferable technical scheme, the bottom end of the shell is provided with a through hole, the bottom end of the volute is provided with a through hole communicated with the first channel of the volute, and the tail end of the output shaft of the driving motor passes through the through hole and the through hole at the bottom end of the shell and is connected with the wind wheel.

As the preferable technical scheme, be located in the air-out chamber two mounting holes's top is equipped with two interior rectification boards respectively, interior rectification board passes through the erection column setting and is in the bottom in the air-out chamber, evenly distributed has a plurality of air-out holes on the interior rectification board.

As a preferable technical scheme, the heating assembly comprises a plurality of heating rods, and the length direction of the heating rods is the same as the length direction of the shell.

As the preferable technical scheme, the number of the air return plates is two, and the outer rectifying plate is positioned between the two air return plates.

As the preferable technical scheme, the novel solar energy heat collector further comprises a shell, wherein the shell is arranged in the shell, a shell opening corresponding to the shell is formed in the top end of the shell, the driving motor part extends out of the bottom end of the shell, and a first heat preservation piece is arranged between the bottom end of the shell and the bottom in the shell.

As the preferable technical scheme, two second heat preservation pieces are respectively arranged between the two ends of the shell and the inner walls of the two ends of the shell.

As the preferable technical scheme, two extending pieces are respectively arranged between the two ends of the shell and the inner walls of the two ends of the shell, and the two second heat preservation pieces are respectively clamped between the two extending pieces and the first heat preservation piece.

The beneficial effects of the utility model are as follows: the air outlet cavity is positioned above the heating cavity, the heating component is arranged at the top of the heating cavity, the air guide volute is arranged in the heating cavity, the inlet and the outlet of the air guide volute are respectively communicated with the heating cavity and the air outlet cavity, the heating component can heat the air in the heating cavity to form hot air, the hot air can enter the air outlet cavity through the inlet, the volute channel and the outlet of the air guide volute under the driving of the wind wheel and under the guiding and pressurizing of the air guide volute, and then can be uniformly blown out to the welding surface of the PCB after passing through a plurality of air outlets of the outer rectifying plate.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a welding heating device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the welding heating device shown in FIG. 1;

FIGS. 3 and 4 are schematic exploded views of the welding heating apparatus of FIG. 1;

FIG. 5 is a schematic view of the housing, fan assembly and heating assembly of the portion of the welding heating apparatus shown in FIG. 1;

FIG. 6 is a schematic view of the structure of the housing and shell of the welding heating device of FIG. 1;

fig. 7 is a schematic structural view of an air guiding scroll of the welding heating apparatus shown in fig. 1.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all the coupling/connection relationships referred to in the patent are not direct connection of the single-finger members, but rather, it means that a better coupling structure can be formed by adding or subtracting coupling aids depending on the specific implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1 to 5, a soldering heating apparatus according to an embodiment of the present utility model is mainly applied to a reflow soldering device. The welding heating device includes a housing 10, a case 20 disposed within the housing 10, a heating assembly 30, and a blower assembly 40.

As shown in fig. 6, the housing 20 has a heating chamber 22 and an air outlet chamber 23 spaced apart from each other. The air outlet chamber 23 is located above the heating chamber 22. The top end of the housing 20 is provided with a first opening and two second openings. The first opening is located between the two second openings. The two second openings are respectively near the left and right ends of the housing 20. The first opening is provided with an outer rectifying plate 24, a plurality of air outlets 242 are uniformly distributed on the outer rectifying plate 24, and the air outlets 242 are communicated with the air outlet cavity 23. Two return air plates 25 with L shapes are respectively arranged at the two second openings, the return air plates 25 with L shapes are uniformly distributed with a plurality of return air inlets 252 on the transverse parts, and the plurality of return air inlets 252 are communicated with the heating cavity 22. The top end of the housing 10 is provided with a housing opening corresponding to the housing 20. The front and rear sides of the housing 10 are provided with front and rear openings, respectively, corresponding to the case 20. The number of the air outlet 242, the air return 252 and the air return plate 25 can be set according to practical situations.

In this embodiment, a first insulating member 15 is disposed between the bottom end of the housing 20 and the bottom inside the casing 10. The first thermal insulating member 15 includes a plurality of layers, for example, three layers of first thermal insulating cotton, which are sequentially disposed from top to bottom. Two second heat-insulating members 16 are respectively arranged between the left end and the right end of the shell 20 and the left end inner wall and the right end inner wall of the shell 10. The second insulating member 16 includes a plurality of layers, for example, three layers, of second insulating cotton disposed in sequence in a direction approaching the housing 20. The first heat preservation cotton and the second heat preservation cotton are the same in material, and the first heat preservation cotton and the second heat preservation cotton play the heat preservation effect to the casing 20, and reducible thermal loss has improved heating efficiency. The number of layers of first heat preservation cotton and second heat preservation cotton can set up according to actual conditions.

Two extending members 29 are respectively arranged between the left end and the right end of the shell 20 and the left end inner wall and the right end inner wall of the shell 10, and two second heat preservation members 16 are respectively clamped between the two extending members 29 and the first heat preservation member 15. The two extensions 29 are preferably integrally formed with the housing 20 for ease of manufacture. The two second insulating elements 16 can be fastened by the two extensions 29 provided.

The fan assembly 40 includes a wind-guiding volute 42, a drive motor 44, and a wind wheel 43. The interior of the wind-guiding scroll 42 has a scroll passage. The air guiding volute 42 is provided with an inlet 421 and an outlet 424. The inlet 421 communicates with the volute passage, the heating chamber 22, respectively. The outlet 424 is respectively communicated with the volute channel and the air outlet cavity 23. A drive motor 44 is disposed at the bottom end of the 20 housing. The wind wheel 43 is arranged in the volute channel, the tail end of a motor shaft of the driving motor 44 stretches into the volute channel and is connected with the wind wheel 43, and the driving motor 44 is used for driving the wind wheel 43 to rotate relative to the wind guide volute 42.

In this embodiment, there are two outlets 424, and the inlet 421 is located between the two outlets 424 and corresponds to the center of the air outlet chamber 23. The scroll passage includes a first passage 422 and two second passages 423 communicating with the first passage 422, respectively, an inlet 421 communicating with the first passage 422, and two outlets 424 communicating with the two second passages 423, respectively.

Specifically, as shown in fig. 7, the wind guiding scroll 42 includes a scroll portion 42a and two scroll tongues 42b formed on both sides of the scroll portion 42 a. The volute section 42a and the two volute tongue sections 42b are integrally formed, and are easy to manufacture. The volute 42a is provided at the center of the bottom inside the heating chamber 22. The tip of the volute 42a has the inlet 421, and the inside of the volute 42a has the first channel 422. The two scroll tongues 42b have the two second passages 423 inside, the top in the heating chamber 22 is provided with two mounting holes 222 communicating with the air outlet chamber 23, and one ends of the two scroll tongues 42b away from the scroll part 42a are respectively disposed in the two mounting holes 222 and respectively have the two outlets 424.

The driving motor 44 partially protrudes from the through hole 152 of the first thermal insulation member 15, the through hole 11 at the bottom end of the housing 10, and is located outside the housing 10. The bottom end of the worm part 42a has a through hole 425 communicating with the first channel 422 of the worm part 42a, and as shown in fig. 7, the bottom end of the housing 20 is provided with a through hole 28, and the end of the output shaft of the driving motor 44 passes through the through hole 28 and the through hole 425 at the bottom end of the housing 20 and is connected to the wind wheel 43.

Two inner rectifying plates 232 are respectively arranged above the two mounting holes 222 in the air outlet cavity 23, the inner rectifying plates 232 are arranged at the bottom in the air outlet cavity 23 through mounting posts 233, and a plurality of air outlet holes 2322 are uniformly distributed on the inner rectifying plates 232. In this embodiment, the number of the mounting posts 233 is two, one ends of the two mounting posts 233 are respectively disposed at the bottom in the air outlet cavity 23, and the other ends of the two mounting posts 233 are respectively disposed on two opposite corners of the corresponding inner rectifying plate 232. The number of the mounting posts 233 and the air outlet 2322 may be set according to practical situations.

A heating assembly 30 is disposed at the top within the heating chamber 22. The heating assembly 30 is located above the scroll 42 a. Specifically, the heating assembly 30 includes a plurality of heating rods 32, and when the heating rods 32 are energized, air in the heating chamber 22 is heated by the heating rods 32. The length direction of the heating rod 32 is the same as the length direction of the housing 20 to achieve sufficient heating of the air within the heating chamber 22. The heating rod 32 is of a conventional structure. In the present embodiment, there are two heating rods 32, and the two heating rods 32 are arranged at intervals in the width direction of the housing 20. The two scroll tongues 42b are located between the two heating bars 32, and are compact. The two heating rods 32 are respectively provided on the two conductive rods 33, one end of the conductive rod 33 is provided on the first mount 333a, and the other end of the conductive rod 33 is provided on the second mount 333 b. The first installation piece 333a is arranged at the top in the heating cavity 22, the second installation pieces 333b of the two conductive rods 33 are arranged on the fixing piece 332 and are used for being connected with an external controller through connecting wires, the second heat preservation pieces 16 positioned on the right are arranged in the two second heat preservation pieces 16, the right end inner wall of the shell 10 is provided with the second through holes 12, the first through holes and the second through holes 12 form installation hole sites, the installation hole sites are internally provided with the installation frames 162, and the fixing pieces 332 are arranged in the installation frames 162. The mounting frame 162 facilitates the passage of the connection wires therethrough. In the present embodiment, each heating rod 32 is composed of two sub-heating rods arranged side by side, and each conductive rod 33 is composed of two sub-conductive rods arranged side by side.

Through the above structure, in practical application, the driving motor 44 drives the wind wheel 43 to rotate, after the gas (such as air or nitrogen) in the heating cavity 22 is fully heated by the heating rod 32 of the heating component 30 to form hot air, the hot air can enter the first channel 422 through the inlet 421 of the wind guiding volute 42, then exit through the two second channels 423 and the two outlets 424, and then enter the air outlet cavity 23 after being uniformly dispersed through the plurality of air outlet holes 2322 of the two inner rectifying plates 232, and then the hot air is blown out onto the welding surface of the PCB above the outer rectifying plates 24 after being uniformly dispersed through the plurality of air outlet holes 242 of the outer rectifying plates 24, thereby realizing the heating of solder paste on the PCB, and the solder paste on the PCB is heated and melted, thus realizing the welding of electronic components and the PCB together. Due to the effect of heat absorption and melting of solder paste on the PCB, the temperature of hot air can be reduced and returned into the heating cavity 22 through the air return inlets 252 of the two air return plates 25, and then the cooled air is continuously heated by the heating rod 32 of the heating assembly 30 to form hot air again, and the hot air can enter the first channel 422 and the two second channels 423 through the inlet 421 of the air guide volute 42 again and then come out from the two outlets 242, so that air circulation can be realized. The arrows in fig. 2 indicate the direction of gas flow.

According to the utility model, the air outlet cavity 23 is positioned above the heating cavity 22, the heating assembly 30 is arranged at the top in the heating cavity 22, the air guide volute 42 is arranged in the heating cavity 22, the inlet 421 and the outlet 424 of the air guide volute 42 are respectively communicated with the heating cavity 22 and the air outlet cavity 23, the air in the heating cavity 22 can be heated through the heating assembly 30 to form hot air, the hot air can enter the air outlet cavity 23 through the inlet 421, the volute channel and the outlet 424 of the air guide volute 42 under the driving of the wind wheel 43 and the guiding and pressurizing of the air guide volute 42, and then can be uniformly blown out to the welding surface of the PCB after passing through the plurality of air outlets 242 of the outer rectifying plate 24, in the process, the hot air heated by the heating assembly 30 flows along the route formed by the inlet 421, the volute channel, the outlet 424 and the air outlet cavity 23, and the hot air can not be blocked, so that the speed of the hot air blown out from the plurality of air outlets 242 onto the welding surface of the PCB is uniform, the temperature difference can not be generated, and the solder paste on the welding surface of the PCB can be thoroughly melted, and the solder paste on the electronic components can be thoroughly welded together, and the solder pads can be firmly welded together.

In addition, the number of the outlets 424 is two, so that the blown hot air is relatively uniform, and the hot air from the outlets 424 can be uniformly dispersed through the plurality of air outlet holes 2322 of the inner rectifying plate 232, so that the hot air can be rectified for the first time, the hot air can be ensured to uniformly enter the air outlet cavity 23, the plurality of air outlets 242 of the outer rectifying plate 24 can uniformly disperse the hot air in the air outlet cavity 23, the second rectification can be realized, the blown hot air can be more uniform, the heating efficiency is improved, and the welding quality is ensured. Through the return air plate 25 and the plurality of return air inlets 252 that set up, can realize air circulation to other after the cooling can enter into the heating chamber 22 from heating element 30's both sides, thereby can evenly heat to the air through heating element 30, further improved heating efficiency, guaranteed welded quality. The driving motor 44 is disposed at the bottom end of the housing 20, so as to avoid damage to the driving motor 44 caused by hot air. The top of the housing 10 is provided with a housing opening, which is convenient for exposing the outer rectifying plate 24 and the two return air plates 25, so that hot air is blown out from the plurality of air outlets 242 onto the welding surface of the PCB board, and cooled air is convenient for entering the heating cavity 22 through the plurality of return air outlets 252.

While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and the equivalent modifications or substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. The utility model provides a welding heating device, its characterized in that, includes casing, heating element and fan subassembly, the inside of casing has heating chamber and the air-out chamber of mutual separation, the air-out chamber is located the top in heating chamber, the top of casing is equipped with outer rectification board and return air board, evenly distributed has a plurality of air outlets on the outer rectification board, a plurality of air outlets all with the air-out chamber intercommunication, evenly distributed has a plurality of return air inlets on the return air board, a plurality of return air inlets all with the heating chamber intercommunication, heating element sets up the top in the heating chamber, the fan subassembly includes wind guiding scroll, driving motor and wind wheel, the wind guiding scroll sets up in the heating chamber, the inside of wind guiding scroll has the spiral case passageway, be equipped with entry and export on the wind guiding scroll, the entry respectively with spiral case passageway, air-out chamber intercommunication, driving motor sets up the bottom of casing, the wind wheel sets up in the motor shaft passageway, the end is stretched into with the spiral case passageway is used for driving to wind guiding scroll relatively.

2. The welding heating device of claim 1, wherein the number of outlets is two, the inlet is located between the two outlets and corresponds to the center of the air outlet cavity, the volute passage comprises a first passage and two second passages respectively communicated with the first passage, the inlet is communicated with the first passage, and the two outlets are respectively communicated with the two second passages.

3. The welding heating device according to claim 2, wherein the air guiding volute comprises a volute part and two volute tongues formed on two sides of the volute part, the volute part is arranged at the bottom of the heating cavity, the top end of the volute part is provided with the inlet, the first channel is arranged in the interior of the volute part, the wind wheel is arranged in the first channel, the two second channels are respectively arranged in the interior of the two volute tongues, two mounting holes communicated with the air outlet cavity are formed in the top of the heating cavity, and one ends, far away from the volute part, of the two volute tongues are respectively arranged in the two mounting holes and are respectively provided with the two outlets.

4. A welding heating device according to claim 3, wherein the bottom end of the housing is provided with a through hole, the bottom end of the volute is provided with a through hole communicated with the first channel of the volute, and the tail end of the output shaft of the driving motor passes through the through hole and the through hole at the bottom end of the housing and is connected with the wind wheel.

5. The welding heating device according to claim 3, wherein two inner rectifying plates are respectively arranged above the two mounting holes in the air outlet cavity, the inner rectifying plates are arranged at the bottom in the air outlet cavity through mounting posts, and a plurality of air outlet holes are uniformly distributed on the inner rectifying plates.

6. The welding heating device of claim 1, wherein the heating assembly comprises a plurality of heating rods having a length that is the same as a length of the housing.

7. The welding heating device of claim 1, wherein the number of return air plates is two, and the outer rectifying plate is located between the two return air plates.

8. The welding heating device of claim 1, further comprising a housing, wherein the housing is disposed within the housing, wherein a top end of the housing is provided with a housing opening corresponding to the housing, wherein the drive motor portion extends from a bottom end of the housing, and wherein a first thermal insulation member is disposed between the bottom end of the housing and a bottom portion within the housing.

9. The welding heating device of claim 8, wherein two second heat-insulating members are respectively provided between both ends of the housing and inner walls of both ends of the housing.

10. The welding heating device according to claim 9, wherein two extending members are respectively provided between both ends of the housing and both end inner walls of the housing, and the two second heat insulating members are respectively interposed between the two extending members and the first heat insulating member.