Thermal cycle drying mechanism

Abstract

The utility model discloses a heat circulation drying mechanism which comprises a box body, a heating assembly and a suction assembly, and a drying channel for products to pass through is arranged in the box body. The heating assembly comprises heating cavities symmetrically formed in the two sides of the box body, and each heating cavity can communicate with the drying channel through a circulating air duct. And a heating piece capable of independently running is arranged in each heating cavity. The suction assemblies are arranged in one-to-one correspondence with the heating cavities and are arranged at the tops of the corresponding heating cavities; the suction assembly is used for sucking the corresponding heating cavity so that airflow in the heating cavity can circulate in the circulating air channel and the drying channel. According to the utility model, a double-path circulation heating mode is realized, and the heat circulation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production, in particular to a thermal cycle drying mechanism. Background Art

[0002] In the field of solar silicon wafer manufacturing, drying of solar cells is one of the most important steps, and the plug-type drying furnace is one of the important devices to complete the drying step. However, the existing plug-type drying furnaces mostly use a single-cycle hot air heating method. This circulation method requires high power requirements for the motor, and sufficient negative pressure must be generated during the circulation process to ensure the normal circulation. However, in actual production, due to the long circulation path, the circulation efficiency is often low due to insufficient negative pressure, the temperature control accuracy is poor, and the drying time is long. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a heat circulation drying mechanism, which realizes a dual-path circulation heating mode through structural improvement and improves the heat circulation efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a heat cycle drying mechanism, including

[0005] A box body, which is provided with a drying passage for the product to pass through;

[0006] The heating assembly comprises heating chambers symmetrically arranged on both sides of the box body, each of the heating chambers can be connected to the drying channel through a circulating air duct; and each of the heating chambers is provided with a heating element that can operate independently;

[0007] A suction component is arranged in one-to-one correspondence with the heating chamber and is arranged on the top of the corresponding heating chamber; the suction component is used to suck the corresponding heating chamber so that the airflow in the heating chamber can circulate in the circulating air duct and the drying channel.

[0008] The beneficial effects of the thermal cycle drying mechanism of the utility model are:

[0009] In the heating component, by arranging heating chambers on both sides of the box body and setting up two suction components and circulating air ducts, independent circulation between a single heating chamber and a drying channel is achieved; the two heating chambers can circulate air with the drying channel at the same time, so as to introduce the airflow heated by the heating element into the drying channel and dry the products in the drying channel; the cooperation of the two heating chambers and the suction components realizes a dual-path circulation heating mode for the drying channel, effectively improves the drying efficiency, and effectively avoids the problem of excessively high suction force requirements of the suction component in the single circulation mode in the prior art.

[0010] Furthermore, the circulation air duct is arranged in one-to-one correspondence with the heating chamber, and includes a first air duct and a second air duct used in conjunction with each other; when the suction component is started, the first air duct guides the airflow in the heating chamber to the drying channel, and the second air duct returns the airflow in the drying channel to the heating chamber. The cooperation of the first air duct and the second air duct realizes the circulation of the heating chamber and the drying channel.

[0011] Furthermore, the two second air ducts are sandwiched between the inner bottom wall and the outer bottom wall of the box body, and the two second air ducts are separated by a partition. The two second air ducts are separated by the partition to avoid the two second air ducts from being connected, thereby ensuring the independent circulation of the two circulation air ducts.

[0012] Furthermore, a return opening for communicating with the second air duct is formed on the inner bottom wall of the box.

[0013] Furthermore, two V-shaped guide inclined plates are symmetrically arranged at the return opening; the guide inclined plates are arranged one-to-one with the second air ducts, and one end of the guide inclined plates is fixed to the inner bottom wall of the box body, and the other end is fixed to the partition. The setting of the guide inclined plates can guide the airflow entering the second air duct from the return opening, so as to facilitate the airflow to enter the second air duct better.

[0014] Furthermore, a second mesh plate covering the return opening is provided on the inner bottom wall of the box body, and the second mesh plate can evenly distribute the airflow entering the second air duct from the drying channel.

[0015] Furthermore, the first air duct is arranged through the side wall of the box, and a first mesh plate is arranged on the inner wall of the box; the airflow entering the box through the first air duct can enter the drying channel after being diverted by the first mesh plate. The first mesh plate can evenly divert the airflow entering the drying channel from the first air duct to ensure the temperature stability of the airflow in the drying channel.

[0016] Furthermore, the inner walls of the first air duct and the second air duct are both covered with a thermal insulation cotton layer to achieve the effect of thermal insulation.

[0017] Furthermore, a side baffle is provided on the inner side wall of the box body at the entrance of the drying passage, and the side baffle is inclined toward the direction close to the exit of the drying passage.

[0018] Furthermore, a waste outlet communicated with the drying passage is provided on the top of the box body, and waste gas generated during the drying process can be discharged through the waste outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the thermal cycle drying mechanism of the utility model embodiment;

[0020] Figure 2 It is a cross-sectional schematic diagram of the thermal cycle drying mechanism of the embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the airflow direction in the thermal cycle drying mechanism of an embodiment of the utility model.

[0022] In the figure:

[0023] 1-box; 11-drying channel; 12-first mesh plate; 13-partition plate; 14-return opening; 141-guide inclined plate; 15-second mesh plate; 16-side baffle plate;

[0024] 2-heating assembly; 21-heating chamber; 22-heating element;

[0025] 3- Suction assembly;

[0026] 41-first air duct; 42-second air duct;

[0027] 5-cover plate; 51-waste outlet. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] Example

[0030] In the prior art, plug-type drying furnaces are mostly equipped with a heating component on one side of the drying channel. The hot air heated by the heating component enters through one side of the drying channel and flows back to the heating component through the return channel from the other side of the drying channel, thereby completing an airflow cycle. In this circulation mode, it is necessary to ensure that sufficient negative pressure can be generated in the return channel on the other side of the drying channel to ensure that the airflow can flow back to the heating component smoothly. In actual production, due to the limited power of the circulating fan, the phenomenon of slow progress of the thermal cycle often occurs due to insufficient negative pressure in the return channel.

[0031] Based on this, see Appendix Figure 1-3As shown, a heat circulation drying mechanism of the utility model includes a housing 1, a heating component 2 and a suction component 3. Among them, a drying channel 11 for the product to pass through is provided in the housing 1. The heating component 2 includes heating chambers 21 symmetrically arranged on both sides of the housing 1, and each heating chamber 21 can be connected to the drying channel 11 through a circulating air duct. And each heating chamber 21 is provided with a heating element 22 that can operate independently. The suction component 3 is arranged in a one-to-one correspondence with the heating chamber 21 and is arranged on the top of the corresponding heating chamber 21; the suction component 3 is used to suck the corresponding heating chamber 21, so that the airflow in the heating chamber 21 can circulate in the circulating air duct and the drying channel 11.

[0032] Specifically, the circulating air duct is arranged in one-to-one correspondence with the heating chamber 21, and includes a first air duct 41 and a second air duct 42 used in conjunction with each other; when the suction assembly 3 is started, the first air duct 41 guides the airflow in the heating chamber 21 to the drying channel 11, and the second air duct 42 returns the airflow in the drying channel 11 to the heating chamber 21. The cooperation of the first air duct 41 and the second air duct 42 realizes the circulation of the heating chamber 21 and the drying channel 11.

[0033] In this embodiment, heating chambers 21 are arranged on both sides of the housing 1, and the circulation duct is set to realize the independent circulation between each heating chamber 21 and the drying channel 11; then the corresponding heating chambers 21 are sucked by the suction assembly 3, so that the airflow in the heating chamber 21 heated by the heating element 22 can enter the drying channel 11 along the first duct 41 to dry the products in the drying channel 11; and the airflow in the drying channel 11 can flow back to the heating chamber 21 through the second duct 42, so as to realize the circulation of the airflow between the heating chamber 21 and the drying channel 11, ensure the uniformity of heating of the product, and thus improve the drying effect of the product. Since two heating chambers 21 and the suction assembly 3 are used in this embodiment, the circulation path of a single circulation duct can be shortened to a certain extent, thereby reducing the power demand of the suction assembly 3.

[0034] In some embodiments, see Appendix Figure 3 As shown, two first air ducts 41 are respectively arranged on the two side walls of the box body 1, and a first mesh plate 12 is arranged on the inner wall of the box body 1, and a plurality of mesh holes are evenly arranged on the first mesh plate 12 in a matrix distribution. The airflow entering the box body 1 through the first air duct 41 can enter the drying channel 11 after being diverted by (the plurality of mesh holes of) the first mesh plate 12.

[0035] When the heated airflow enters the drying channel 11 from the first air duct 41, the airflow first contacts the first mesh plate 12 and is evenly distributed into the drying channel 11 through the plurality of mesh holes on the first mesh plate 12, so that the heat of the airflow can be more evenly distributed in the drying channel 11, thereby making the product heated more evenly and stably.

[0036] In some embodiments, the two second air ducts 42 are sandwiched between the inner bottom wall and the outer bottom wall of the box body 1, and the two second air ducts 42 are separated by a partition 13. The two second air ducts 42 are separated by the partition 13 to avoid the two second air ducts 42 from being connected, thereby ensuring the independent circulation of the two circulation air ducts.

[0037] In order to achieve the connection between the drying channel 11 and the second air duct 42, in some embodiments, a return opening 14 for connecting the second air duct 42 is provided on the inner bottom wall of the box body 1. Furthermore, two guide inclined plates 141 arranged in a V shape are symmetrically arranged at the return opening 14. The guide inclined plates 141 are arranged one-to-one with the second air duct 42, and one end of the guide inclined plates 141 is fixed on the inner bottom wall of the box body 1, and the other end is fixed on the partition 13. The provision of the guide inclined plates 141 can guide the airflow entering the second air duct 42 from the return opening 14, so as to facilitate the airflow to enter the second air duct 42 better.

[0038] In some embodiments, a second mesh plate 15 covering the return opening 14 is disposed on the inner bottom wall of the box body 1. The second mesh plate 15 can evenly distribute the airflow entering the second air duct 42 from the drying channel 11.

[0039] In addition, in order to avoid heat loss during the circulation of airflow, in some embodiments, the inner walls of the first air duct 41 and the second air duct 42 are covered with a thermal insulation cotton layer.

[0040] In some embodiments, the heating element 22 includes a plurality of electric heating tubes distributed from top to bottom in the heating chamber 21. Electric heating tubes can be used, and the electric heating tubes are fixed on the side wall of the heating chamber 21.

[0041] In some embodiments, a cover plate 5 is provided on the top of the box body 1, and a waste outlet 51 is provided on the cover plate 5 and communicated with the drying channel 11. The waste outlet 51 can discharge the waste gas generated during the drying process. Furthermore, a one-way valve is installed at the waste outlet 51.

[0042] In some embodiments, the end where the product enters the drying channel 11 is the drying channel entrance, and the end where the product leaves the drying channel 11 is the drying channel exit. A side baffle 16 is provided on the inner side wall of the box body 1 at the drying channel entrance, and the side baffle 16 is inclined toward the drying channel exit. This is because in actual production, multiple drying mechanisms are usually arranged in a row, and the side baffle 16 can be used to distinguish a corresponding drying mechanism from an adjacent drying mechanism.

[0043] In some embodiments, the suction assembly 3 includes a suction fan installed on the top of the heating chamber 21.

[0044] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A thermal cycle drying mechanism, characterized in that: include A box body, which is provided with a drying passage for the product to pass through; The heating assembly comprises heating chambers symmetrically arranged on both sides of the box body, each of the heating chambers can be connected to the drying channel through a circulating air duct; and each of the heating chambers is provided with a heating element that can operate independently; A suction component is arranged in one-to-one correspondence with the heating chamber and is arranged on the top of the corresponding heating chamber; the suction component is used to suck the corresponding heating chamber so that the airflow in the heating chamber can circulate in the circulating air duct and the drying channel.

2. The heat cycle drying mechanism according to claim 1, characterized in that: The circulating air duct is arranged in a one-to-one correspondence with the heating chamber, and includes a first air duct and a second air duct used in conjunction with each other; when the suction component is started, the first air duct guides the airflow in the heating chamber to the drying channel, and the second air duct returns the airflow in the drying channel to the heating chamber.

3. The heat cycle drying mechanism according to claim 2, characterized in that: The two second air ducts are both sandwiched between the inner bottom wall and the outer bottom wall of the box body, and the two second air ducts are separated by a partition.

4. The heat cycle drying mechanism according to claim 3, characterized in that: The inner bottom wall of the box body is provided with a return opening for communicating with the second air duct.

5. The heat cycle drying mechanism according to claim 4, characterized in that: Two V-shaped guide inclined plates are symmetrically arranged at the return opening; the guide inclined plates are arranged one-to-one corresponding to the second air ducts, and one end of each guide inclined plate is fixed to the inner bottom wall of the box body, and the other end is fixed to the partition.

6. The heat cycle drying mechanism according to claim 4, characterized in that: A second mesh plate covering the reflux opening is provided on the inner bottom wall of the box body.

7. The heat cycle drying mechanism according to claim 2, characterized in that: The first air duct is arranged through the side wall of the box body, and a first mesh plate is arranged on the inner wall of the box body; the airflow entering the box body through the first air duct can enter the drying channel after being diverted by the first mesh plate.

8. The heat cycle drying mechanism according to any one of claims 2 to 7, characterized in that: The inner walls of the first air duct and the second air duct are both covered with a thermal insulation cotton layer.

9. The heat cycle drying mechanism according to claim 1, characterized in that: A side baffle is provided on the inner side wall of the box body at the entrance of the drying passage, and the side baffle is inclined toward the direction close to the exit of the drying passage.

10. The heat cycle drying mechanism according to claim 1, characterized in that: A waste outlet communicated with the drying channel is provided on the top of the box body.

Images