Novel uniform air drying tank for photovoltaic silicon wafers

Abstract

The utility model discloses a novel uniform air drying groove for photovoltaic silicon wafers. The novel uniform air drying groove comprises a drying groove body, an air blowing pipe, an air exhausting pipe and a heating fan. A plurality of transverse hot air pipes are longitudinally fixed to the lower end of a groove cavity of the drying groove at equal intervals, and air return pipes are symmetrically arranged on the two longitudinal sides of the upper end. Two ends of the plurality of blowpipes are communicated with an air outlet of the heating fan and an air inlet of the hot air pipe; the two ends of the exhaust pipes are communicated with an air inlet of the heating fan and an air outlet of the air return pipe; when the photovoltaic silicon wafer is dried, the heating fan is started, hot air uniformly enters the lower end of the groove cavity through the air outlet holes of the air blowing pipe and the hot air pipe, a hot air flow field from bottom to top in the groove cavity is formed, the photovoltaic silicon wafer is dried, and wet air is brought out of the groove cavity through the air draft holes of the air return pipe and the air draft pipe. The utility model has the effects of uniform hot air flow field, uniform hot air heat distribution, low humidity of long-term internal circulation of the tank body and improved dryness.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic parts drying, in particular to a novel uniform air drying tank for photovoltaic silicon wafers. Background Art

[0002] At present, the solar energy industry is developing rapidly. In the process of preparing solar cell silicon wafers, the silicon wafers need to be dried. The current drying equipment uses the hot air pipe in the middle of the equipment tank to blow hot air for drying. Its defects are: first, the mutual blowing easily forms turbulent airflow in the middle area. At the same time, the hot air flow usually flows upward and does not have the power to actively flow downward. The wind field flow in the drying tank is uneven, and the air volume intensity of the hot air field in the tank is insufficient; second, the circulation uniformity of the overall internal flow wind field is insufficient, and the heat of the hot air in the tank is relatively concentrated and unevenly distributed; third, after a long period of drying inside the tank, the humidity is relatively high, and the overall dryness of the target object is insufficient, which is easy to cause poor drying. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides a novel uniform air drying tank for photovoltaic silicon wafers.

[0004] According to one aspect of the utility model, the novel uniform air drying tank for photovoltaic silicon wafers comprises: a drying tank, a blowing pipe, an exhaust pipe and a heating fan;

[0005] The drying tank includes a tank cavity, several hot air ducts and a return air duct. The tank cavity is a plastic box with an openable top cover. The middle area of ​​the tank cavity is connected to a basket support for loading photovoltaic silicon wafers. Several horizontal hot air ducts are fixed at equal intervals at the lower end of the tank cavity. The end of the hot air duct is closed and the air outlet holes are distributed in an array on the tube wall. The return air ducts are symmetrically arranged on both sides of the upper end of the tank cavity. The end of the return air duct is closed and the exhaust holes are distributed in an array on the tube wall.

[0006] One end of a plurality of blowing pipes is connected to the air outlet of the heating fan and the other end is connected to the air inlet of the hot air pipe;

[0007] One end of a plurality of exhaust ducts is connected to the air inlet of the heating fan and the other end is connected to the air outlet of the return air duct;

[0008] The heating fan is started, and the hot air enters the lower end of the tank cavity evenly through the air outlet of the blowing pipe and the hot air pipe, forming a hot air flow field from bottom to top in the tank cavity, drying the photovoltaic silicon wafers, and bringing the wet air out of the tank cavity through the exhaust holes and exhaust pipe of the return air duct.

[0009] In some embodiments, the upper tube wall of the hot air duct is circumferentially distributed with multiple rows of air holes, and the air holes in each row are horizontally evenly spaced.

[0010] In some embodiments, the outer end of the blowing pipe extends through the outer wall of one end of the slot cavity and the inner end extends transversely to the inner wall of the other end of the slot cavity.

[0011] In some embodiments, the plurality of longitudinal clamping plates at the lower end of the tank cavity and the plurality of clamping holes in the middle of each longitudinal clamping plate respectively fix the hot air pipe;

[0012] Or the blow pipe and the hot air pipe are clamped and fixed with a pipe clamp.

[0013] In some embodiments, the longitudinal clamping plate is connected to inclined sealing plates on both sides, and the inclined sealing plates are connected to the groove cavity through a plurality of reinforcing rib plates distributed at equal intervals.

[0014] In some embodiments, a plurality of air exhaust holes are provided at equal intervals on the relatively inner surfaces of the return air duct, and the return air duct is fixed to the upper side wall of the tank cavity by a plurality of lateral clamping plates.

[0015] In some embodiments, two horizontal and hollow side end frames are symmetrically arranged on both sides of the upper end of the groove cavity, the outer vertical surface of the lateral clamping plate is connected to the groove cavity, and its lower end surface and inner side surface are connected to the side end frame; the inner side plate of the side end frame is provided with a plurality of ventilation gap holes.

[0016] In some embodiments, two return air ducts are symmetrically connected in two side end frames; the air inlet of the heating fan is connected to the two longitudinal branches through a three-way joint, and the two ends of the two symmetrical vertical pipes are connected to the return air duct and the longitudinal branches respectively through right-angle elbows.

[0017] In some embodiments, the heating fan includes a fan located on the lower side and a heating box on the upper side. The fan and the heating box are connected by a vertical pipe. The air outlet of the heating box is connected to several blowing pipes, and the blowing pipes are bent downward to connect to the hot air pipe at the lower end.

[0018] In some embodiments, the drying tank is made of polyvinylidene fluoride, and heat insulation cotton is arranged in the hollow interlayer of each cavity wall of the tank cavity.

[0019] The novel uniform air drying tank for photovoltaic silicon wafers adopts the method of placing the hot air pipe connected with the blowing pipe under the tank cavity, placing the return air pipe on both sides, and placing the photovoltaic silicon wafer in the middle. The inertia of the hot air flowing from top to bottom and the reasonably arranged hot air pipe blowing to form a wind field can form a uniform hot air flow field in the tank cavity. The air has heat radiation after being heated. The fan provides wind pressure and its own heat radiation, which can form a stable and uniform hot air field in the tank cavity, and quickly and efficiently dry the target object; at the same time, the air with high humidity is entrained upward and brought out of the tank cavity through the breathable gap, so as to simultaneously reduce the overall humidity in the tank cavity; its beneficial effects are: first, the hot air flow field in the tank is more uniform and can evenly cover the entire target object; second, the heat of the hot air is more evenly distributed in the tank cavity; third, the humidity in the tank is low during long-term circulation, and the dryness is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic front view of a novel uniform air drying tank for photovoltaic silicon wafers according to one embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic top view of a novel uniform air drying tank for photovoltaic silicon wafers is shown;

[0022] Figure 3 for Figure 1 The left side schematic diagram of a novel uniform air drying tank for photovoltaic silicon wafers is shown;

[0023] Figure 4 for Figure 1 A schematic diagram of wind circulation of a novel uniform air drying tank for photovoltaic silicon wafers is shown;

[0024] Drying tank 1, tank cavity 10, hot air pipe 11, air outlet 111, return air pipe 12, exhaust hole 121, flower basket support 13, inclined sealing plate 14, reinforcing rib plate 15, longitudinal clamping plate 16, lateral clamping plate 17, side end frame 18, ventilation gap hole 181;

[0025] Blowing pipe 2; exhaust pipe 3; heating fan 4. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0027] Figures 1 to 4A new uniform air drying tank for photovoltaic silicon wafers according to an embodiment of the present invention is schematically shown. As shown in the figure, the new uniform air drying tank for photovoltaic silicon wafers comprises: a drying tank 1, a blowing pipe 2, an exhaust pipe 3 and a heating fan 4;

[0028] The drying tank 1 includes a tank cavity 10, a plurality of hot air pipes 11 and a return air pipe 12. The tank cavity 10 is a plastic box with an openable top cover. The middle area of ​​the tank cavity 10 is connected to a basket support 13 for loading photovoltaic silicon wafers.

[0029] A plurality of transverse hot air pipes 11 are fixed at equal intervals in the longitudinal direction at the lower end of the trough cavity 10, the end opening of the hot air pipe 11 is closed and air holes 111 are distributed in an array on the tube wall. Preferably, multiple rows of air holes 111 are distributed circumferentially on the upper tube wall of the hot air pipe 11, and the air holes 111 in each row are distributed at equal intervals in the transverse direction.

[0030] The return air ducts 12 are symmetrically arranged on both sides of the upper end of the tank cavity 10, the end of the return air duct 12 is closed and the exhaust holes 121 are distributed in a row on the tube wall; preferably, a plurality of exhaust holes 121 are evenly spaced on the opposite inner surfaces of the two return air ducts 12.

[0031] One end of a plurality of blowing pipes 2 is connected to the air outlet of the heating fan 4 and the other end is connected to the air inlet of the hot air pipe 11;

[0032] One end of a plurality of exhaust pipes 3 is connected to the air inlet of the heating fan 4 and the other end is connected to the air outlet of the return air pipe 12;

[0033] The heating fan 4 is started, and the hot air enters the lower end of the tank cavity 10 evenly through the air outlet 111 of the blowing pipe 2 and the hot air pipe 11, forming a hot air flow field from bottom to top in the tank cavity 10, drying the photovoltaic silicon wafers, and bringing the wet air out of the tank cavity 10 through the exhaust holes 121 of the return air pipe 12 and the exhaust pipe 3.

[0034] The novel uniform air drying tank for photovoltaic silicon wafers adopts a method of placing the hot air pipe 11 connected to the blowing pipe 2 under the tank cavity 10, placing the return air pipe 12 on both sides, and placing the photovoltaic silicon wafer in the middle. The inertia of the hot air flowing from top to bottom and the reasonably arranged hot air pipe 11 blowing to form a wind field can form a uniform hot air flow field in the tank cavity. The air has heat radiation after being heated. The fan provides wind pressure and its own heat radiation, which can form a stable and uniform hot air field in the tank cavity, and quickly and efficiently dry the target object; at the same time, the air with high humidity is entrained upward and brought out of the tank cavity through the breathable gap, so as to simultaneously reduce the overall humidity in the tank cavity; its beneficial effects are: first, the hot air flow field in the tank is more uniform and can evenly cover the entire target object; second, the heat of the hot air is more evenly distributed in the tank cavity; third, the humidity in the tank is low during long-term circulation, and the dryness is improved.

[0035] Furthermore, the outer end of the blowing pipe 3 extends through the outer wall of one end of the groove cavity 10 and the inner end extends horizontally to the inner wall of the other end of the groove cavity 10. Preferably, a plurality of longitudinal clamps 16 are provided at the lower end of the groove cavity 10, and a plurality of clamping holes in the middle of each longitudinal clamp 16 respectively fix the hot air pipe 11. The blowing pipe 3 and the hot air pipe 11 are preferably clamped and fixed by a pipe clamp. The blowing pipe 3 is preferably a corrugated pipe. The beneficial effect is that the hot air pipe 11 is fixed and stable, and will not shake to cause uneven airflow.

[0036] Preferably, the longitudinal clamping plate 16 is connected to the inclined sealing plate 14 on both sides, and the inclined sealing plate 14 is connected to the tank cavity 10 through a plurality of equally spaced reinforcing ribs 15. The beneficial effect is that the inclined side plates and the reinforcing ribs 15 further improve the connection strength.

[0037] Furthermore, the return air duct 12 is fixed to the upper side wall of the tank cavity 10 by a plurality of lateral clamping plates 17. Preferably, the outer end of the blowing pipe 3 extends through the outer wall of the upper end of the tank cavity 10 and the inner end extends transversely to the inner wall of the other end of the tank cavity 10. Preferably, two transverse and internally hollow side end frames 18 are symmetrically arranged on both sides of the upper end of the tank cavity 10, and the outer vertical surface of the lateral clamping plate 17 is connected to the tank cavity 10 and its lower end surface and inner side surface are connected to the side end frame 18; the inner side plate of the side end frame 18 is provided with a plurality of ventilation gap holes 181. The beneficial effect is that the return air duct 11 is fixed and stable, and will not shake to cause uneven airflow.

[0038] Preferably, there are two exhaust air ducts 3 and two return air ducts 12, and the two return air ducts 12 are symmetrically connected in the two side end frames 18;

[0039] The air inlet of the heating fan 4 is connected to the two longitudinal branches through a three-way joint, and the two ends of the two symmetrical vertical pipes are connected to the return air pipe 12 and the longitudinal branches respectively through right-angle elbows. The beneficial effect is that this arrangement further improves the uniformity of the air flow field.

[0040] Furthermore, the heating fan 4 includes a fan located at the lower side and a heating box at the upper side, the fan and the heating box are connected through a vertical pipe, the air outlet of the heating box is connected to a plurality of blowing pipes 2, and the blowing pipes 2 are bent downward to be connected to the hot air pipe 11 at the lower end;

[0041] Preferably, there are six blowing pipes 2 and six hot air pipes 11. The beneficial effect is that this arrangement further improves the uniformity of the air supply flow.

[0042] Furthermore, the drying tank 1 is made of polyvinylidene fluoride, and heat insulation cotton is arranged in the hollow interlayer of each cavity wall of the tank cavity 10. The beneficial effect is that the arrangement prevents heat loss and improves the utilization rate of the drying heat source.

[0043] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A novel uniform air drying tank for photovoltaic silicon wafers, characterized in that: It comprises: a drying tank (1), a blowing pipe (2), an exhaust pipe (3) and a heating fan (4); The drying tank (1) comprises a tank cavity (10), a plurality of hot air pipes (11) and a return air pipe (12); the tank cavity (10) is a plastic box with an openable top cover; a basket support (13) for loading photovoltaic silicon wafers is connected to the middle region of the tank cavity (10); a plurality of transverse hot air pipes (11) are fixed at equal intervals in the longitudinal direction at the lower end of the tank cavity (10); the end openings of the hot air pipes (11) are closed and the pipe walls thereof are provided with air outlet holes (111) in an array; the return air pipes (12) are symmetrically arranged on both sides of the upper end of the tank cavity (10); the end openings of the return air pipes (12) are closed and the pipe walls thereof are provided with exhaust holes (121) in an array; One end of a plurality of the blowing pipes (2) is connected to the air outlet of the heating fan (4) and the other end is connected to the air inlet of the hot air pipe (11); One end of a plurality of the exhaust pipes (3) is connected to the air inlet of the heating fan (4) and the other end is connected to the air outlet of the return air pipe (12); The heating fan (4) is started, and hot air evenly enters the lower end of the tank cavity (10) through the air outlet (111) of the blowing pipe (2) and the hot air pipe (11), forming a hot air flow field from bottom to top in the tank cavity (10), drying the photovoltaic silicon wafers, and bringing the wet air out of the tank cavity (10) through the exhaust hole (121) of the return air pipe (12) and the exhaust pipe (3).

2. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 1 is characterized in that: The upper tube wall of the hot air pipe (11) is circumferentially distributed with multiple rows of air holes (111), and the air outlet holes (111) in each row are horizontally distributed at equal intervals.

3. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 2 is characterized in that: The outer end of the blowing pipe (2) extends through the outer wall of one end of the groove cavity (10), and the inner end extends transversely to the inner wall of the other end of the groove cavity (10).

4. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 3 is characterized in that: A plurality of longitudinal clamping plates (16) at the lower end of the tank cavity (10), and a plurality of clamping holes in the middle of each longitudinal clamping plate (16) respectively fixing the hot air pipe (11); Alternatively, the blowing pipe (2) and the hot air pipe (11) are clamped and fixed with a pipe clamp.

5. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 4, characterized in that: The longitudinal clamping plate (16) is connected to inclined sealing plates (14) on both sides, and the inclined sealing plates (14) are connected to the groove cavity (10) via a plurality of reinforcing rib plates (15) distributed at equal intervals.

6. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 1, characterized in that: A plurality of air exhaust holes (121) are arranged at equal intervals on the relative inner side surfaces of the return air duct (12), and the return air duct (12) is fixed to the upper side wall of the tank cavity (10) via a plurality of lateral clamping plates (17).

7. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 6, characterized in that: Two transverse and internally hollow side end frames (18) are symmetrically arranged on both sides of the upper end of the groove cavity (10); the outer vertical surface of the lateral clamping plate (17) is connected to the groove cavity (10) and its lower end surface and inner side surface are connected to the side end frame (18); the inner side plate of the side end frame (18) is provided with a plurality of ventilation gap holes (181).

8. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 7, characterized in that: The two return air ducts (12) are symmetrically distributed and connected in the two side end frames (18); the air inlet of the heating fan (4) is connected to the two longitudinal branch pipes through a three-way joint, and the two ends of the two symmetrical vertical pipes are respectively connected to the return air duct (12) and the longitudinal branch pipes through right-angle elbows.

9. The novel uniform air drying tank for photovoltaic silicon wafers according to claim 8, characterized in that: The heating fan (4) comprises a fan located at the lower side and a heating box at the upper side, the fan and the heating box are connected via a vertical pipe, the air outlet of the heating box is connected to a plurality of blowing pipes (2), and the blowing pipes (2) are bent downward to be connected to the hot air pipe (11) at the lower end.

10. A novel uniform air drying tank for photovoltaic silicon wafers according to any one of claims 1 to 9, characterized in that: The drying tank (1) is made of polyvinylidene fluoride material, and heat insulation cotton is arranged in the hollow interlayer of each cavity wall of the tank cavity (10).

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