A PCB board baking device with waste heat utilization function

Abstract

The present invention relates to the field of PCB drying, and in particular to a PCB board drying device with a waste heat utilization function, including a special-shaped electric guide rail and a ducted drying box, etc.; the special-shaped electric guide rail is connected to the ducted drying box; the ducted drying box is provided with three spaces, and the PCB board body is dried in multiple stages in turn in the three spaces; the special-shaped electric guide rail is in a step-shaped shape. The present invention extracts the hot air gathered in the upper part of the middle space of the oven and uses it to preheat the PCB board body in the right space of the oven, thereby avoiding the deformation of the PCB board body due to high temperature baking in the middle of the oven, and also extracts the hot air to the left space of the oven, which is used to heat the original contact position of the PCB board body, thereby achieving full drying of the PCB board body, thereby achieving full utilization of waste heat, saving a lot of energy resources, reducing the production cost of the enterprise, and improving the production efficiency of the enterprise.

Description

Technical Field

[0001] The invention relates to the field of PCB drying, and in particular to a PCB board drying device with a waste heat utilization function. Background Art

[0002] In the existing PCB production and processing process, several steps are usually required. For example, the PCB board often needs to be degreased, electroplated, drilled, etc. Before the next processing step, the PCB board needs to be kept clean and tidy, so the PCB board needs to be cleaned. After the PCB board is cleaned, the PCB board needs to be dried before the next processing step.

[0003] The existing PCB board drying machine generally puts the PCB board into the oven and then starts to heat up from room temperature. It takes a lot of time to raise the temperature to the drying temperature of the PCB board, which limits the production and processing efficiency of the PCB board. If the PCB board is directly sent to the oven that has reached the drying temperature, the PCB board is easily baked and deformed, resulting in a decrease in the quality of the PCB board. In addition, the existing drying machine cannot specifically dry the residual moisture in the etched pits on the PCB board, resulting in insufficient drying of the PCB board, affecting subsequent PCB board processing operations. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art in drying PCB boards, in which waste heat cannot be utilized, resulting in a large amount of time spent in the drying process, or the PCB boards are deformed by baking, and the residual moisture in the etch pits on the PCB boards cannot be fully dried, the present invention provides a PCB board drying device with waste heat utilization function.

[0005] The technical solution is: a PCB board drying device with waste heat utilization function, including a special-shaped electric guide rail and a ducted drying box; the special-shaped electric guide rail is connected to the ducted drying box; three spaces are arranged in the ducted drying box, and the PCB board body is dried in multiple stages in turn in the three spaces; the special-shaped electric guide rail is a step-shaped; it also includes a heat collecting cover, a drying box, a three-way pipe, a blower, a duct, a hot air plate, an electric slider, a rotating joint and a basket; the ducted drying box is connected to the heat collecting cover; the heat collecting cover is connected to two drying boxes; each drying box is connected to There is a three-way pipe; the duct-type drying box is connected to two blowers; each blower is connected to a three-way pipe; each three-way pipe is connected to a duct; each duct is connected to a hot air plate; the two hot air plates are fixed to the special-shaped electric guide rails; the two hot air plates are respectively located in the left and right spaces of the duct-type drying box; the special-shaped electric guide rails are composed of a mounting frame and two electric slide rails, each electric slide rail is slidably connected to two electric sliders; each electric slider is connected to a rotating joint; all the rotating joints are commonly connected to a basket.

[0006] Furthermore, the ducted drying oven includes an oven, an electric door I, an electric door II, an electric door III, an electric door IV and a heater; the special-shaped electric guide rail is fixedly connected to the oven; the oven is equipped with two opposing electric doors I, two opposing electric doors II, two opposing electric doors III and two opposing electric doors IV from right to left; each electric door I, electric door II, electric door III and electric door IV is provided with a distance sensor; the electric door I, electric door II, electric door III and electric door IV divide the oven into three spaces; the upward protruding platform of the special-shaped electric guide rail is located in the space between electric door II and electric door III; the right slope of the special-shaped electric guide rail is located in the space between electric door I and electric door II; the left slope of the special-shaped electric guide rail is located in the space between electric door III and electric door IV; a heater is installed at the lower part of the protruding platform of the special-shaped electric guide rail.

[0007] Furthermore, the heater is composed of a protective shell, a heating tube and an air duct, and the interface height between the air duct and the protective shell is lower than the height of the heating tube in the protective shell.

[0008] Furthermore, a plurality of rectangular air vents are equidistantly arranged on the upper portion of the protective shell of the heater, and the air vents are arranged parallel to the placement direction of the PCB board body on the basket.

[0009] Furthermore, the rotating joint is formed by movably connecting two support rods, and the upper support rod is provided with a telescopic structure.

[0010] Furthermore, a plurality of equally spaced limiting strips are provided on the side of the basket; and a plurality of equally spaced cross bars are provided at the bottom of the basket.

[0011] Furthermore, the limiting strip is coated with a thermal conductive coating.

[0012] Furthermore, each cross bar has a slot.

[0013] Furthermore, a groove is formed at the lower part of the vertical rod of the basket, and the telescopic part of the rotating joint is in detachable contact and fit with the groove at the lower part of the basket.

[0014] Furthermore, it also includes a thermal power cylinder, a U-shaped frame, a connecting rod and a spring; each cross bar is fixedly connected to a thermal power cylinder at the lower part; the thermal power cylinder is composed of a cylinder body, a piston and a movable rod, and the movable rod is fixedly connected to the piston to form a telescopic part of the thermal power cylinder; each telescopic part of the thermal power cylinder is fixedly connected to a U-shaped frame; each U-shaped frame is fixedly connected to a connecting rod; each connecting rod passes through a cross bar and is slidably connected to it; each slot is fixedly connected to a number of springs; only one end of the spring is fixedly connected to the slot; the other end of the spring is fixedly connected to the connecting rod. Beneficial Effects

[0015] 1. The present invention extracts the hot air gathered in the upper part of the middle space of the oven and uses it to preheat the PCB board body in the right space of the oven, thereby avoiding deformation of the PCB board body due to high temperature baking in the middle of the oven, and also extracts the hot air to the left space of the oven to heat the original contact position of the PCB board body, thereby achieving full drying of the PCB board body, thereby achieving full utilization of waste heat, saving a lot of energy resources, reducing the production cost of the enterprise, and improving the production efficiency of the enterprise.

[0016] 2. By setting the special-shaped electric guide rail to a step shape, the PCB board body placed in the basket automatically leans against the adjacent limit strips when passing through the small slope on the special-shaped electric guide rail, thereby achieving the regularity of the PCB board body and facilitating the full drying of the PCB board body.

[0017] 3. By arranging a spring on the crossbar and utilizing the change in temperature to drive the deformation of the spring, the spring limits the lower part of the PCB board body. Therefore, when the basket passes through the small slope on the left side of the special-shaped electric guide rail, the PCB board body is tilted and leans between the two limit bars. With the hot air blown out by the hot air plate on the left, not only the moisture on the circuit pattern pits on the PCB board body is fully dried, but also the basket and its components are cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the oven of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the heater of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation position of the PCB board body of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotary joint of the present invention;

[0023] Figure 6 It is a schematic diagram of the installation position of the cross bar of the present invention;

[0024] Figure 7 It is a schematic diagram of the installation position of the reed of the present invention;

[0025] Figure 8 It is a schematic diagram of the state change of the PCB board body of the present invention.

[0026] The names and serial numbers of the parts in the figure are: 001-PCB board body, 1-special-shaped electric guide rail, 2-oven, 3-electric door I, 4-electric door II, 5-electric door III, 6-electric door IV, 7-heater, 8-heat collecting cover, 9-drying box, 10-three-way pipe, 11-blower, 12-duct, 13-hot air plate, 14-electric slider, 15-rotating joint, 16-basket, 1601-limiting strip, 1602-cross bar, 1603-slot, 101-thermal power cylinder, 102-U-shaped frame, 103-connecting rod, 104-reed. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] A PCB board baking device with waste heat utilization function, according to Figure 1-Figure 8 As shown, it includes a special-shaped electric guide rail 1 and a ducted drying box; the special-shaped electric guide rail 1 is connected to the ducted drying box; three spaces are arranged in the ducted drying box, and the PCB board body 001 is dried in multiple stages in the three spaces in turn; the special-shaped electric guide rail 1 is a step-shaped;

[0030] It also includes a heat collecting cover 8, a drying box 9, a three-way pipe 10, a blower 11, a conduit 12, a hot air plate 13, an electric slider 14, a rotating joint 15 and a basket 16; the ducted drying box is connected to the heat collecting cover 8; the heat collecting cover 8 is connected to two drying boxes 9 distributed on the left and right; each drying box 9 is connected to a three-way pipe 10; the ducted drying box is connected to two blowers 11 distributed on the left and right; each blower 11 is connected to a three-way pipe 10; each three-way pipe 10 is connected to a conduit 12; each Each duct 12 is connected to a hot air plate 13; the two hot air plates 13 are fixedly connected to the special-shaped electric guide rail 1; the two hot air plates 13 are respectively located in the left and right spaces of the duct drying box; the special-shaped electric guide rail 1 is composed of a mounting frame and two electric slide rails, each of which is slidably connected to two electric sliders 14 distributed on the left and right; each electric slider 14 is connected to a rotating joint 15; all the rotating joints 15 are commonly connected to a basket 16; the basket 16 is used to hold the PCB board body 001.

[0031] The ducted drying oven includes an oven 2, an electric door Ⅰ3, an electric door Ⅱ4, an electric door Ⅲ5, an electric door Ⅳ6 and a heater 7; the special-shaped electric guide rail 1 is fixedly connected to the oven 2; the oven 2 is equipped with two opposite electric doors Ⅰ3, two opposite electric doors Ⅱ4, two opposite electric doors Ⅲ5 and two opposite electric doors Ⅳ6 from right to left; each electric door Ⅰ3, electric door Ⅱ4, electric door Ⅲ5 and electric door Ⅳ6 is provided with a distance sensor; the electric door Ⅰ3, electric door Ⅱ4, electric door Ⅲ5 and electric door Ⅳ6 are ... The electric door I3, the electric door II4, the electric door III5 and the electric door IV6 divide the oven 2 into three spaces; the upward protruding platform of the special-shaped electric guide rail 1 is located in the space between the electric door II4 and the electric door III5; the right slope of the special-shaped electric guide rail 1 is located in the space between the electric door I3 and the electric door II4; the left slope of the special-shaped electric guide rail 1 is located in the space between the electric door III5 and the electric door IV6; a heater 7 is installed at the lower part of the protruding platform of the special-shaped electric guide rail 1.

[0032] The heater 7 is composed of a protective shell, a heating tube and an air duct. The interface height between the air duct and the protective shell is lower than the height of the heating tube in the protective shell. After the air enters the protective shell through the air duct, the heating tube can fully heat the air during the upward flow of the air, thereby facilitating the drying of the PCB board body 001.

[0033] The upper part of the protective shell of the heater 7 is provided with a plurality of rectangular air vents which are arranged at equal distances, and the air vents are arranged parallel to the placement direction of the PCB board body 001 on the basket 16 .

[0034] The rotating joint 15 is formed by hingedly connecting two supporting rods, and the upper supporting rod is provided with a telescopic structure.

[0035] A plurality of equally spaced limiting bars 1601 are provided on the side of the basket 16 ; a plurality of equally spaced cross bars 1602 are provided at the bottom of the basket 16 .

[0036] The limiting strip 1601 is coated with a heat-conducting coating, so that the contact portion between the PCB body 001 and the limiting strip 1601 can also be sufficiently heated, so that the PCB body 001 is fully dried.

[0037] Each cross bar 1602 has a straight groove 1603 for reducing the contact area between the cross bar 1602 and the PCB body 001 so that the PCB body 001 is sufficiently heated.

[0038] A groove is formed at the lower part of the vertical rod of the basket 16 , and the telescopic part of the rotating joint 15 is in detachable contact and fit with the groove at the lower part of the basket 16 .

[0039] The working steps of the above embodiment are:

[0040] In the process of producing and processing the PCB body 001, several steps are usually required. For example, the PCB body 001 often needs to be degreased, electroplated, drilled, etc. Before the next processing step, the PCB body 001 needs to be kept clean and tidy, so the PCB body 001 needs to be cleaned. At this time, the working areas of each processing step are connected by a special-shaped electric guide rail 1, and the ducted drying box is set after the PCB body 001 cleaning device of each process. The staff operates the manipulator to take the cleaned PCB body 001 out of the cleaning device, and then The PCB body 001 is placed on the basket 16 at a time, and only one PCB body 001 is placed between every two adjacent limit bars 1601 on the basket 16. When the basket 16 is full, the corresponding electric slider 14 is controlled to move on the special-shaped electric guide rail 1, and the heating tube of the heater 7 is controlled to start working. The heating tube heats the air in the protective shell. After the external air pump is connected to the air duct, air is pumped into the protective shell of the heater 7 through the air duct. The hot air in the heater 7 is blown out from the upper rectangular air outlet, and the hot air enters the middle space of the oven 2, so that the temperature of the middle space of the oven 2 is increased, which is convenient for the subsequent drying of the PCB body 001. Figure 8 As shown, the electric slider 14 moves from right to left, synchronously driving the rotating joint 15 and the corresponding parts thereon to move. When the basket 16 approaches the electric door Ⅰ3, the distance sensor on the electric door Ⅰ3 detects the basket 16, and at this time the control starts the right blower 11, which filters and absorbs air from the outside, and then blows it into the three-way pipe 10, and then enters the right hot air plate 13 through the conduit 12, and then blows it upward from the right hot air plate 13. At the same time, when the air is pumped into the three-way pipe 10 and enters the conduit 12, based on the Bernoulli principle, the connection part between the three-way pipe 10 and the drying box 9 will also have Air also enters the duct 12, thereby the three-way pipe 10 generates negative pressure, so the hot air gathered in the upper part of the middle space of the oven 2 will enter the drying box 9 on the right through the heat collecting cover 8, and then replenish into the three-way pipe 10, and then enter the hot air plate 13 on the right through the duct 12. At this time, the hot air flowing out from the middle of the oven 2 is mixed with the outside air in the duct 12, and then blown from bottom to top to the space on the right side of the oven 2 through the hot air plate 13, heating the right space of the oven 2. At this time, the temperature of the right space of the oven 2 is lower than the temperature of the middle space of the oven 2, realizing the first stage of waste heat utilization.

[0041] Then the electric door Ⅰ3 is opened, and then the electric slider 14 continues to move to the left, so that the basket 16 enters the space on the right side of the oven 2, and then the electric door Ⅰ3 is closed again to prevent a large amount of heat from being dissipated in the space on the right side of the oven 2. Considering that the PCB board body 001 is irregularly placed in the basket 16, the gaps between adjacent PCB board bodies 001 are inconsistent, and there is a local gap between two adjacent PCB board bodies 001 that becomes smaller or larger, causing turbulence and pressure changes in the local area of ​​the gap between the two PCB board bodies 001, resulting in uneven heat transfer between the PCB board bodies 001, causing the surface of some PCB board bodies 001 to be overheated, while the surface of another part of the PCB board body 001 is not heated enough. At this time, due to the stepped structure on the special-shaped electric guide rail 1, the basket 16 is Figure 8 As shown in the above figure, as the electric slider 14 moves on the special-shaped electric guide rail 1, the corresponding rotating joint 15 rotates in coordination, and the left electric slider 14 first passes through the right slope of the special-shaped electric guide rail 1, and synchronously lifts the left part of the basket 16 upward, thereby making the PCB board body 001 placed between the limiting bars 1601 of the basket 16 lean against the adjacent right limiting bar 1601, as shown in FIG. Figure 8 As shown in the above figure, the PCB body 001 is arranged in a regular manner, and turbulence is effectively avoided between adjacent PCB bodies 001 when the disorderly PCB body 001 is dried in the middle space of the oven 2, resulting in uneven temperature distribution of the PCB body 001, which in turn causes thermal stress on the surface of some PCB bodies 001, or insufficient drying of the surface of the PCB body 001. After the PCB body 001 is arranged, the hot air blown from the bottom to the top by the hot air plate 13 heats the PCB body 001 in the basket 16, so that the temperature of the PCB body 001 increases, and the PCB body 001 is also subjected to the first stage of temperature rise drying, which effectively avoids the PCB body 001 suddenly entering the middle of the oven 2, resulting in deformation of the PCB body 001 due to high temperature baking in the middle of the oven 2, and the heat that cannot be used for drying the PCB body 001 in the upper part of the oven 2 is extracted for preheating the PCB body 001, thereby realizing the first stage of waste heat utilization.

[0042] Then, the electric door II4 is controlled to open, and then the electric slide block 14 is controlled to continue to move to the left, and the rotating joint 15 rotates in coordination, so that the basket 16 enters the middle space of the oven 2 at the same time. Figure 8As shown in the middle figure, the electric hatch II4 is then controlled to close to reduce the hot air leakage in the middle space of the oven 2, so as to avoid a significant drop in the temperature of the middle space of the oven 2, which would result in a decrease in the drying efficiency of the PCB board body 001. At this time, the external pump blows the hot air in the heater 7 upward, and the air outlet on the upper part of the heater 7 is parallel to the placement of the PCB board body 001. Therefore, the hot air blown upward by the heater 7 is parallel to the PCB board body 001. Therefore, the hot air can fully heat the PCB board body 001 and smoothly take away the water evaporated from the PCB board body 001, thereby realizing the second stage of constant temperature drying of the PCB board body 001, effectively avoiding the prior art in which the PCB board body 001 is stably clamped, which results in It is difficult to fully dry the moisture in the PCB body 001 and the clamping part. If the PCB body 001 is not in a fixed state, the PCB body 001 may be placed in a disorderly manner, resulting in the moisture evaporated from the lower part of the PCB body 001 rising with the hot air. The disorderly placed PCB body 001 blocks the hot air containing water vapor, and the water vapor is easily condensed on the PCB body 001 again, which prolongs the drying time of the PCB body 001, wastes energy resources, and reduces the production and processing efficiency of the PCB body 001. The evaporated moisture gathers upward with the hot air, and with the blowing of the blower 11, the hot air with moisture passes through the heat collecting cover 8 and enters the drying box 9. After the drying box 9 absorbs the moisture, only the hot air is left for recycling.

[0043] Then, after the PCB board body 001 is dried for a period of time, the PCB board body 001 has been dried as a whole. At this time, the left blower 11 is controlled to start, and the heat in the middle of the oven 2 is extracted and mixed with the outside air as mentioned above, and then the hot air plate 13 is injected. The left hot air plate 13 blows the hot air after the moisture is screened out to the left space of the oven 2, and the temperature of the left space of the oven 2 increases. At this time, the temperature of the left space of the oven 2 is lower than the temperature of the middle space of the oven 2. Then, the electric door III5 is controlled to open, the electric slider 14 is controlled to continue to move to the left, and the rotating joint 15 is coordinated to rotate, so that the basket 16 enters the small slope space on the left side of the oven 2, and then the electric door III5 is controlled to be closed. Similarly, a large amount of heat loss in the middle of the oven 2 is avoided, resulting in a significant drop in the temperature in the middle of the oven 2. At this time, the basket 16 is Figure 8As shown in the bottom figure, the basket 16 is in a state of being lower on the left and higher on the right, so the PCB body 001 will move to the left and lean against the adjacent left limit strip 1601, just like when it just enters the right space of the oven 2. At this time, due to the change in the contact position between the PCB body 001 and the basket 16, the previous contact state between the basket 16 and the PCB body 001 is separated, and the hot air blown out by the left hot air plate 13 dries the original contact position on the PCB body 001, and due to the hot air blown out by the left hot air plate 13 The temperature of the hot air is lower than the temperature in the middle of the oven 2. Therefore, in the process of drying the contact position of the PCB body 001, the heat is also dissipated to other parts of the PCB body 001 simultaneously, so as to realize the third stage of cooling and drying the PCB body 001. The heat that cannot be used for drying the PCB body 001 in the upper part of the oven 2 is extracted and used for heating the contact position of the PCB body 001, so as to realize the waste heat utilization in the second stage, achieve the full utilization of the waste heat, save a lot of energy resources, reduce the production cost of the enterprise, and improve the production efficiency of the enterprise.

[0044] Second embodiment

[0045] On the basis of the first embodiment, according to Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, it also includes a thermal power cylinder 101, a U-shaped frame 102, a connecting rod 103 and a reed 104; each cross bar 1602 is fixedly connected to a thermal power cylinder 101 at the lower part; the thermal power cylinder 101 is composed of a cylinder body, a piston and a movable rod, and the movable rod is fixedly connected to the piston to form a telescopic part of the thermal power cylinder 101; each telescopic part of the thermal power cylinder 101 is fixedly connected to a U-shaped frame 102; each U-shaped frame 102 is fixedly connected to a connecting rod 103; each connecting rod 103 passes through a cross bar 1602 and is slidably connected thereto; each straight groove 1603 is fixedly connected to a number of equally spaced reeds 104; only one end of the reed 104 is fixedly connected to the straight groove 1603; the other end of the reed 104 is fixedly connected to the connecting rod 103.

[0046] The working steps of the above embodiment are:

[0047] On the basis of the first embodiment, it is also necessary to consider that, for the production of the PCB body 001 of the single-sided circuit board, the two sides have different surface morphologies, and the similar drying operation cannot be used to dry the side of the PCB body 001 engraved with the circuit in detail, and it is difficult to fully dry the moisture in the etched pits on the side of the PCB body 001 engraved with the circuit. At this time, a thermal power cylinder 101 is set at the lower part of the cross bar 1602 supporting the PCB body 001, and a straight groove 1603 is opened on the cross bar 1602. , and the spring pieces 104 corresponding to the number of the PCB board bodies 001 are fixed on the slots 1603. When the PCB board body 001 is placed in the basket 16, the side of the PCB board body 001 engraved with the circuit is placed to the left. Then, when the basket 16 enters the right space of the oven 2, the small slope on the right side of the special-shaped electric guide rail 1 is used to regularize the position of the PCB board body 001. Then, the hot air blown from the hot air plate 13 on the right side from bottom to top begins to preliminarily heat the thermal power cylinder 101, and then the thermal power cylinder 1 01 heats the air inside it, and the air in the thermal power cylinder 101 expands due to the heat, pushing out the piston, thereby realizing that the telescopic part of the thermal power cylinder 101 begins to slowly extend, and synchronously pulls the U-shaped frame 102 and the corresponding parts thereon, so that the connecting rod 103 moves to the right, and the connecting rod 103 drives one end of the reed 104 to move, so that it approaches the fixed end of the reed 104 and the slot 1603, so that the reed 104 begins to deform slightly, and then when the basket 16 enters the middle space of the oven 2, a large amount of hot air blows to the thermal power cylinder 101 , the thermodynamic cylinder 101 begins to extend significantly, causing the deformation of the reed 104 to intensify. The reed 104 arches upward in an arch bridge shape until the reed 104 abuts against the lower part of the adjacent PCB board body 001. Then, when the basket 16 enters the left space of the oven 2, the basket 16 is in a state of being lower on the left and higher on the right. At this time, the arched reed 104 abuts against the lower part of the PCB board body 001, so that the lower part of the PCB board body 001 will not slide to the left, but the upper part of the PCB board body 001 still has a tendency to move to the left, so the PCB board body 001 will be Figure 8The inclined state is shown in the following figure. At this time, the side of the PCB body 001 with the circuit pattern etched pit is inclined downward, and the hot air blown out from the left hot air plate 13 is directly blown to the side of the PCB body 001 with the circuit pattern etched pit, thereby specifically drying the moisture at the circuit pattern etched pit on the PCB body 001. After the PCB body 001 is dried, the electric hatch IV6 is controlled to be opened, and the basket 16 is synchronously made to leave the left space of the oven 2, and then the electric hatch IV6 is controlled to be closed, the temperature of the basket 16 and the corresponding parts thereon is further reduced, and the air temperature in the thermal power cylinder 101 is also reduced accordingly. The air in the thermal power cylinder 101 contracts to reset the piston, thereby realizing the contraction of the telescopic part of the thermal power cylinder 101, and synchronously restoring the reed 104, and finally re-accommodating it in the slot 1603, so as to avoid the situation that the lower part of the PCB body 001 is restricted by the reed 104 when the PCB body 001 is taken out later, resulting in the lower part of the reed 104 being stuck.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PCB board drying device with waste heat utilization function, comprising a special-shaped electric guide rail (1) and a ducted drying box; the special-shaped electric guide rail (1) is connected to the ducted drying box; the ducted drying box is provided with three spaces, and the PCB board body (001) is dried in multiple stages in turn in the three spaces; the special-shaped electric guide rail (1) is in a step-shaped shape; and the characteristics are: The invention also comprises a heat collecting cover (8), a drying box (9), a three-way pipe (10), a blower (11), a conduit (12), a hot air plate (13), an electric slider (14), a rotating joint (15) and a basket (16); the ducted drying box is connected to the heat collecting cover (8); the heat collecting cover (8) is connected to two drying boxes (9); each drying box (9) is connected to a three-way pipe (10); the ducted drying box is connected to two blowers (11); each blower (11) is connected to a three-way pipe (10); each three-way pipe (10) is connected to a A duct (12) is connected; each duct (12) is connected to a hot air plate (13); the two hot air plates (13) are fixedly connected to the special-shaped electric guide rail (1); the two hot air plates (13) are respectively located in the left and right spaces of the duct-type drying box; the special-shaped electric guide rail (1) is composed of a mounting frame and two electric slide rails, each electric slide rail is slidably connected to two electric sliders (14); each electric slider (14) is connected to a rotating joint (15); all the rotating joints (15) are commonly connected to a basket (16).

2. The PCB board baking device with waste heat utilization function according to claim 1 is characterized in that: The ducted drying oven comprises a drying oven (2), an electric door I (3), an electric door II (4), an electric door III (5), an electric door IV (6) and a heater (7); the special-shaped electric guide rail (1) is fixedly connected to the drying oven (2); the drying oven (2) is provided with two opposite electric doors I (3), two opposite electric doors II (4), two opposite electric doors III (5) and two opposite electric doors IV (6) in sequence from right to left; each of the electric doors I (3), the electric door II (4), the electric door III (5) and the electric door IV (6) is provided with a distance sensor; The electric door I (3), the electric door II (4), the electric door III (5) and the electric door IV (6) divide the oven (2) into three spaces; the upwardly protruding platform of the special-shaped electric guide rail (1) is located in the space between the electric door II (4) and the electric door III (5); the right slope of the special-shaped electric guide rail (1) is located in the space between the electric door I (3) and the electric door II (4); the left slope of the special-shaped electric guide rail (1) is located in the space between the electric door III (5) and the electric door IV (6); and a heater (7) is installed at the lower part of the protruding platform of the special-shaped electric guide rail (1).

3. The PCB board baking device with waste heat utilization function according to claim 2 is characterized in that: The heater (7) is composed of a protective shell, a heating tube and an air duct, and the height of the interface between the air duct and the protective shell is lower than the height of the heating tube in the protective shell.

4. The PCB board baking device with waste heat utilization function according to claim 3 is characterized in that: A plurality of rectangular air vents are provided at equal intervals on the upper portion of the protective shell of the heater (7), and the air vents are arranged parallel to the placement direction of the PCB board body (001) on the basket (16).

5. The PCB board baking device with waste heat utilization function according to claim 4 is characterized in that: The rotating joint (15) is formed by movably connecting two support rods, and the upper support rod is provided with a telescopic structure.

6. A PCB board baking device with waste heat utilization function according to any one of claims 1 to 5, characterized in that: A plurality of equally spaced limiting strips (1601) are provided on the side of the basket (16); and a plurality of equally spaced cross bars (1602) are provided on the lower part of the basket (16).

7. The PCB board baking device with waste heat utilization function according to claim 6 is characterized in that: The limiting strip (1601) is coated with a thermal conductive coating.

8. The PCB board baking device with waste heat utilization function according to claim 7 is characterized in that: Each cross bar (1602) has a slot (1603).

9. The PCB board baking device with waste heat utilization function according to claim 8 is characterized in that: A groove is formed at the lower part of the vertical rod of the basket (16), and the telescopic part of the rotating joint (15) is detachably contacted and matched with the groove at the lower part of the basket (16).

10. The PCB board baking device with waste heat utilization function according to claim 9, characterized in that: It also includes a thermal power cylinder (101), a U-shaped frame (102), a connecting rod (103) and a reed (104); each cross bar (1602) is fixedly connected to a thermal power cylinder (101) at the lower part; the thermal power cylinder (101) is composed of a cylinder body, a piston and a movable rod, and the movable rod is fixedly connected to the piston to form a telescopic part of the thermal power cylinder (101); each telescopic part of the thermal power cylinder (101) is fixedly connected to a U-shaped frame (102); each U-shaped frame (102) is fixedly connected to a connecting rod (103); each connecting rod (103) passes through a cross bar (1602) and is slidably connected thereto; each straight groove (1603) is fixedly connected to a plurality of reeds (104); only one end of the reed (104) is fixedly connected to the straight groove (1603); the other end of the reed (104) is fixedly connected to the connecting rod (103).

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