A finned thermostatic heating device

Abstract

The utility model discloses a fin constant temperature heating device, according to the heat of heating wire is collected, and through the effective heat dissipation of great heat dissipation area, through the even setting in the furnace body inside, can directly for the sample of edge also carry out effective heating, the heat of fin carries heating wire heat and transmits to the whole space in the furnace body inside through metal fin. The furnace body inside also sets different cavities according to the heating physical trend of sample, through the setting of cavity can respectively for its rapid heating, high temperature drying and constant temperature solidification carry out classification process. Be favorable to under the premise of not influencing sample condition, and under the premise of not increasing production cost, carry out effective drying to different types of sample, be favorable to avoid the decline of yield due to the performance problem of equipment, and reduce the number of experimental batch, reduce the error and manual cost and time cost due to repeated experiment, improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of solar cell process equipment, specifically relating to a fin constant temperature heating device. Background Technology

[0002] Solar energy, as a new type of sustainable green energy, is a hot topic now and in the future, with great development potential, and photovoltaic power generation projects are highly favored by capital. The production process of solar cells is the core of photovoltaic power generation; their photoelectric conversion efficiency determines the product's competitiveness, and production speed represents the economic benefits of photovoltaic companies. From its inception to the present, solar cells have undergone continuous technological innovation and rapid product iteration. Surface grid lines have played a crucial role. Whether using high-temperature or low-temperature pastes, to better transport electrons and reduce shading area, grid line development is trending towards low resistance, multiple main grids, and fine sub-grids. Screen printing is an indispensable part of the photovoltaic industry, directly impacting its development.

[0003] In the screen printing production process, furnace drying is an essential step in the drying of solar cells. It is mainly used in various annealing and paste film drying processes. Existing heating devices have slow heating rates and poor temperature stability, which prevents samples from being effectively dried and cured within the corresponding time. Especially for higher temperature heating conditions, the heating area is small and the specific surface area is too low, resulting in low heating efficiency. This device uses a finned device to achieve constant temperature heating, which allows for better experimental arrangement and planning in production and research and development. Utility Model Content

[0004] To address the aforementioned issues, the purpose of this novel experimental device is to provide a finned constant-temperature heating device that optimizes the production and manufacturing process while achieving high-performance positrons, significantly reducing costs and energy consumption, as well as production losses and human error.

[0005] This novel experimental design is achieved through the following technical solution:

[0006] This utility model provides a finned constant temperature heating device, including a furnace body, a heating system and an airflow system. The furnace body has a cavity and is divided into at least three temperature zones arranged independently in a sequential direction by at least two partition shielding doors. The furnace body also includes a sample transport track, which is fixed to the bottom of the cavity in the same direction as the temperature zones. Each temperature zone is provided with the heating system and the airflow system.

[0007] Furthermore, the three temperature zones are sequentially arranged as a high-speed heating zone, a high-temperature drying zone, and a furnace constant temperature zone.

[0008] In an optional embodiment, the furnace body has a feed inlet and a discharge outlet on both sides of the high-speed heating zone and the constant temperature zone of the furnace body. The feed inlet is equipped with an independently controlled feed shield door and a feed insulation door, and the discharge outlet is equipped with an independently controlled discharge shield door and a discharge insulation door. The feed shield door and the discharge shield door are both located on the outside of the furnace body, and the feed insulation door and the discharge insulation door are both located on the inside of the furnace body.

[0009] Furthermore, a high-temperature insulation layer is provided on the inner side of the discharge insulation door.

[0010] In an optional embodiment, the device further includes an infeed track and an outfeed track, respectively disposed outside the infeed shielding door and the outfeed shielding door, and in the same horizontal direction as the sample transport track.

[0011] Furthermore, the partition shielding door may also be provided with a furnace insulation layer, which is disposed in the interlayer or on both sides of the partition shielding door.

[0012] In an optional embodiment, the heating system includes heating fins and high-temperature heating wires, with at least two of the heating fins symmetrically arranged on both sides of the sample transport track in each temperature zone.

[0013] Furthermore, several high-temperature heating wires are interspersed in the heating fins, and the materials used for the heating fins include, but are not limited to, copper, aluminum, cast iron, stainless steel, alloys, etc.

[0014] Furthermore, the heating system also includes a temperature zone master controller and a busbar, a conduction zone, an electrical signal conduction line, and an independent heating controller that are sequentially electrically connected to the temperature zone master controller. The temperature zone master controller has at least two independent busbars on both sides, and each busbar is individually connected to the conduction zone. The conduction zone is sequentially connected to the independent heating controller through at least two electrical signal conduction lines, and each independent heating controller is connected to a corresponding high-temperature heating wire.

[0015] In one embodiment, the airflow system includes an air inlet, an air outlet, an airflow duct, an airflow solenoid valve, a pressure sensor controller, a pressure relief valve, an exhaust fan, an intake fan, and a constant flow duct.

[0016] Furthermore, each temperature zone is provided with an air inlet and an air outlet at its bottom and top, respectively. The air inlet is connected to the air intake fan through at least two airflow pipes, and the air outlet is connected to the exhaust fan through at least two airflow pipes. Each airflow pipe is equipped with an airflow solenoid valve. Each airflow valve is independent of each other and can control the airflow pipe branch it is responsible for independently.

[0017] Furthermore, each temperature zone has at least two intake fans, which are symmetrically arranged on both sides of the sample transport track and at the bottom outer side of the heating fins; each temperature zone also has at least two exhaust fans, which are symmetrically arranged on both sides of the sample transport track and at the top outer side of the heating fins. The intake fans transport the incoming gas to the fins for heating and then to the batteries on the sample transport track for drying. The exhaust fans also extract the dried gas from the temperature zone and discharge it outside the furnace.

[0018] Furthermore, constant flow pipes are also installed in the high-temperature drying zone, with at least two of the constant flow pipes connected to the exhaust fan and intake fan on the same side respectively.

[0019] Furthermore, the pressure sensor controller and pressure relief valve are located at the bottom of each temperature zone.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] This utility model discloses a finned constant-temperature heating device. It collects heat from the heating wire and effectively dissipates it through a large heat dissipation area. By uniformly arranging the fins inside the furnace, it can effectively heat samples even at the edges. The fins guide the heat from the heating wire to the entire interior space of the furnace. Different chambers are designed inside the furnace according to the physical heating characteristics of the samples, allowing for separate processes such as rapid heating, high-temperature drying, and constant-temperature curing. This is beneficial for effectively drying different types of samples without affecting their condition or increasing production costs. It helps avoid a decrease in yield due to equipment performance issues, reduces the number of experimental batches, minimizes errors, labor costs, and time costs associated with repeated experiments, and improves production efficiency. Furthermore, the ability to adjust temperatures in different ranges and set up gradient experiments provides a more precise drying method compared to conventional drying ovens. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a longitudinal cross-sectional schematic diagram of a finned constant temperature heating device provided in an embodiment of this utility model;

[0024] Figure 2This is a schematic cross-sectional view of the fin system of a finned constant temperature heating device provided in this embodiment of the utility model;

[0025] Figure 3 This is a cross-sectional schematic diagram of the gas pipeline system of a finned constant temperature heating device provided in an embodiment of this utility model.

[0026] 10. Furnace body; 20. Heating system; 30. Airflow system; 40. High-speed heating zone; 50. High-temperature drying zone; 60. Furnace body constant temperature zone;

[0027] 101. Feeding track; 102. Sample transport track; 1021. Feeding shielding door; 1022. Feeding insulated door; 1023. Discharge insulated door; 1024. Discharge shielding door; 103. Discharge track; 104. Furnace insulation layer; 105. Zone shielding door; 106. High-temperature isolation layer;

[0028] 201. Electrical signal transmission line; 202. Independent heating controller; 203. Heating fins; 204. Temperature zone master controller; 205. Busbar area; 206. Conduction area; 207. High-temperature heating wire;

[0029] 3011, Air inlet; 3012, Air outlet; 302, Airflow duct; 303, Airflow solenoid valve; 304, Air pressure sensor controller; 3041, Pressure relief valve; 305, Exhaust fan; 306, Intake fan; 307, Constant flow duct. Detailed Implementation

[0030] The present invention will be further described below with reference to embodiments and accompanying drawings, but this is not intended to limit the scope of protection of the claims of this application. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Please see Figure 1-3This utility model provides a finned constant temperature heating device, including a furnace body 10, a heating system 20 and an airflow system 30. The furnace body 10 has a cavity, which is divided into at least three temperature zones arranged independently in a sequential direction by at least two partition shielding doors 105. The furnace body 10 also includes a sample transport track 102, which is fixed to the bottom of the cavity in the same direction as the temperature zones. Each temperature zone is provided with the heating system 20 and the airflow system 30.

[0033] Furthermore, the three temperature zones are a high-speed heating zone 40, a high-temperature drying zone 50, and a furnace constant temperature zone 60, arranged sequentially. The high-temperature heating zone 40 rapidly heats the sample to a set temperature of 25℃-200℃. The high-temperature drying zone 50 maintains a high temperature for rapid drying of the sample, with the temperature set at 150℃-400℃. The furnace constant temperature zone 60 performs constant temperature curing on the rapidly high-temperature dried sample to ensure complete curing on the surface, with the temperature set at 150℃-300℃.

[0034] The furnace body 10 has a feed inlet and a discharge outlet on both sides of the high-speed heating zone 40 and the constant temperature zone 60. The feed inlet is equipped with an independently controlled feed shielding door 1021 and a feed insulation door 1022, and the discharge outlet is equipped with an independently controlled discharge shielding door 1024 and a discharge insulation door 1023. The feed shielding door 1021 and the discharge shielding door 1024 are both located on the outside of the furnace body 10, and the feed insulation door 1022 and the discharge insulation door 1023 are both located on the inside of the furnace body 10 to improve the heat preservation and sealing effect of the furnace body.

[0035] Meanwhile, since the constant temperature zone 60 of the furnace body needs to maintain a constant temperature to reduce the impact of drastic temperature changes on the internal drying efficiency, a high-temperature isolation layer 106 is also provided on the inner side of the discharge insulation door 1023 to reduce the impact of the external environment on the internal temperature.

[0036] The device also includes a feeding track 101 and a discharging track 103, which are respectively located outside the feeding shielding door 1021 and the discharging shielding door 1023, and are in the same horizontal direction as the sample transport track 102, so that the sample can be transported through the feeding track 101 to the sample transport track 102, enter the furnace body 10 for drying, and then be transported to the discharging track 103 to realize automated drying operation.

[0037] Furthermore, a separate furnace insulation layer 104 may also be provided on the partition shielding door 105, and the separate furnace insulation layer 104 is provided in the interlayer or on both sides of the partition shielding door 105.

[0038] In one embodiment, the heating system 20 includes heating fins 203 and high-temperature heating wires 207. At least two heating fins 203 are symmetrically arranged on both sides of the sample transport track 102 in each temperature zone to ensure heat supply and constant temperature within the temperature zone. Several high-temperature heating wires 207 are interspersed within the heating fins 203. The materials used for the heating fins include, but are not limited to, copper, aluminum, cast iron, stainless steel, and alloys. The high-temperature heating wires 207 release heat through electric current and then conduct it to the heating fins 203. The large area ratio of the fins allows for rapid heating of the air, reducing heat loss and inefficiency caused by slow heating.

[0039] Furthermore, the heating system 20 also includes a temperature zone master controller 204 and a junction area 205, a conduction area 206, an electrical signal conduction line 201, and an independent heating controller 202 that are sequentially electrically connected to the temperature zone master controller 204. The temperature zone master controller 204 has at least two independent junction areas 205 on both sides for signal convergence and collection. Each junction area 205 is individually connected to the conduction area 206, which is used for signal distribution and electrical connection to the junction area 205. The conduction area 206 is sequentially connected to the independent heating controller 202 through at least two electrical signal conduction lines 201. Each independent heating controller 202 is connected to a corresponding high-temperature heating wire 207, thereby providing independent heat control and temperature control for different temperature zones.

[0040] In one embodiment, the airflow system 30 includes an air inlet 3011, an air outlet 3012, an airflow duct 302, an airflow solenoid valve 303, a pressure sensor controller 304, a pressure relief valve 3041, an exhaust fan 305, an intake fan 306, and a constant flow duct 307.

[0041] Furthermore, each temperature zone is provided with an air inlet 3011 and an air outlet 3012 at its bottom and top, respectively. The air inlet 3011 is connected to the air intake fan 306 through at least two airflow pipes 302, and the air outlet 3012 is connected to the exhaust fan 305 through at least two airflow pipes 302. Each airflow pipe 302 is provided with an airflow solenoid valve 303 to control the air pressure balance inside the temperature zone. Each airflow valve is independent of each other and can control the branch of the airflow pipe 302 it is responsible for.

[0042] Specifically, each temperature zone has at least two intake fans 306, which are symmetrically arranged on both sides of the sample transport track 102 and the bottom outer side of the heating fins 203; each temperature zone also has at least two exhaust fans 305, which are symmetrically arranged on both sides of the sample transport track 102 and the top outer side of the heating fins 203. The gas entering from the outside through the intake fans 306 is transferred to the fins for heating and then transferred to the batteries on the sample transport track 102 for drying. The dried gas is also extracted from the temperature zone and discharged from the furnace body 10 through the exhaust fans 305, achieving good heat and temperature control of the temperature zone.

[0043] Furthermore, a constant flow pipe 307 is also provided in the high-temperature drying zone 50. At least two of the constant flow pipes 307 are respectively connected to the exhaust fan 305 and the intake fan 306 on the same side. Since the sample has undergone the first stage of sample heating in the high-speed heating zone 40 at the front end, it enters this temperature zone after preheating. At this time, the temperature inside the furnace has become relatively uniform. At this time, the airflow solenoid valve 303 and the pressure relief valve 3041 of the high-temperature drying zone 50 are closed to prevent the high-heat airflow inside the furnace body 10 from leaking out. The airflow inside the furnace is circulated by operating the exhaust fan 305, the intake fan 306, and the constant flow pipe 307. The temperature inside the furnace body 10 is circulated through the airflow. The heat is brought into the furnace by the regular airflow passing through the heating fins 203, maintaining a high-temperature constant temperature state.

[0044] Furthermore, the pressure sensor controller 304 and the pressure relief valve 3041 are located at the bottom of each temperature zone, which can monitor the internal pressure of the temperature zone. When the internal pressure of the temperature zone is too high, a certain amount of gas can be discharged to adjust the internal pressure balance. The pressure sensor controller 304 is used to detect the internal gas pressure of the furnace body 10, and with a pre-set threshold, the pressure relief valve 3041 is controlled by detecting the threshold to control the internal pressure of the furnace body 10.

[0045] Please see Figure 1-3 In this embodiment, the high-speed heating zone 40 is controlled and adjusted by the temperature zone master controller 204. The high-temperature heating wire 207 is rapidly heated through the busbar 205 and the conduction zone 206 via the electrical signal conduction line 201. The heating fins 203 dissipate heat and heat the air in the zone. Since this temperature zone directly corresponds to the external cold air, the sample will cause a large amount of heat loss when it enters. This temperature zone has a specially set feed insulation door 1022. At the same time, the high-power heating of the high-temperature heating wire 207 ensures that the sample receives sufficient heat transfer, thereby enabling the sample to be heated to the set temperature.

[0046] In another embodiment, since the sample in the high-speed heating zone 40 has just entered this partition space, the feed shield door 1021 and the feed insulation door 1022 have just been closed by mechanical movement. At the same time, due to the large influx of external cold air, the overall temperature inside the furnace drops significantly. In order to achieve high-speed heating in a short time, the airflow duct 302 is equipped with multiple airflow solenoid valves 303, all of which are in the closed state to minimize the airflow with the outside. As a result, the internal heating causes the air pressure to expand. The air pressure fluctuation will trigger the air pressure sensor controller 304 at the bottom of the partition space. When the air pressure balance threshold is reached, it will control the pressure relief valve 3041 to discharge air to ensure the internal air pressure dynamic balance.

[0047] In another embodiment, the high-temperature drying zone 50 is controlled and adjusted by the temperature zone master controller 204. The high-temperature heating wire 207 is rapidly heated through the busbar 205 and the conduction zone 206 via the electrical signal conduction line 201. The heating fins 203 dissipate heat to heat the air in the zone. If it is in a dynamic heating state, the airflow in this zone is circulated by the exhaust fan 305 and the intake fan 306. The addition of the fan makes the overall heat in the zone evenly distributed to ensure that the temperature difference between the high and low areas of the zone is as small as possible.

[0048] Furthermore, since the sample has undergone the first stage of sample heating in the high-speed heating zone 40 at the front end, it enters this temperature zone after preheating, at which point the temperature inside the furnace has become relatively uniform. At this time, the airflow solenoid valve 303 and the pressure relief valve 3041 are closed to prevent the high-heat airflow inside the furnace from leaking out. The exhaust fan 305, the intake fan 306, and the constant flow pipe 307 are operated to circulate the airflow inside the furnace, thereby circulating the temperature inside the furnace. The regular airflow passes through the heating fins 203 to bring heat into the furnace, maintaining a high-temperature constant temperature.

[0049] In another embodiment, since the previous process has already completed the high-temperature reflow heating of the sample, the sample has already undergone high-temperature treatment in the previous process zone. The constant temperature zone 60 of the furnace body heats the sample about to be removed from the furnace using a curing method. Since the curing stage after high-temperature drying can be carried out at a non-extremely high temperature, constant temperature curing is performed in this temperature zone. Furthermore, the pre-cooling is beneficial to the operation of subsequent processes after the sample leaves the furnace body 10, keeping the sample at room temperature for subsequent processes. This effectively shortens the automation steps and length of the drying oven, improves the automation production efficiency, and reduces the excessively long cooling steps caused by the lack of pre-cooling.

[0050] The above embodiments are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle of this utility model. All technical solutions after making equivalent substitutions to the claims of this utility model fall within the protection scope of this utility model, which is defined by the appended claims and their equivalents.

Claims

1. A finned constant temperature heating device, characterized in that, The furnace includes a furnace body, a heating system, and an airflow system. The furnace body has a cavity and is divided into at least three temperature zones arranged independently in a sequential direction by at least two partition shielding doors. The furnace body also includes a sample transport track, which is fixed to the bottom of the cavity in the same direction as the temperature zones. Each temperature zone is equipped with the heating system and the airflow system.

2. The finned constant temperature heating device according to claim 1, characterized in that, The three temperature zones are, in sequence, a high-speed heating zone, a high-temperature drying zone, and a furnace constant temperature zone.

3. The finned constant temperature heating device according to claim 2, characterized in that, The furnace body has a feed inlet and a discharge outlet on both sides of the high-speed heating zone and the constant temperature zone. The feed inlet is equipped with an independently controlled feed shield door and a feed insulation door, and the discharge outlet is equipped with an independently controlled discharge shield door and a discharge insulation door. The feed shield door and the discharge shield door are both located on the outside of the furnace body, and the feed insulation door and the discharge insulation door are both located on the inside of the furnace body.

4. The finned constant temperature heating device according to claim 3, characterized in that, A high-temperature isolation layer is also provided on the inner side of the discharge isolation door.

5. The finned constant temperature heating device according to claim 3, characterized in that, It also includes an infeed track and an outfeed track, which are respectively set outside the infeed shielding door and the outfeed shielding door, and are in the same horizontal direction as the sample transport track.

6. The finned constant temperature heating device according to claim 1, characterized in that, The partition shielding door is also provided with a furnace insulation layer, which is located in the interlayer or on both sides of the partition shielding door.

7. The finned constant temperature heating device according to claim 1, characterized in that, The heating system includes heating fins and high-temperature heating wires, with at least two heating fins symmetrically arranged on both sides of the sample transport track in each temperature zone.

8. The finned constant temperature heating device according to claim 7, characterized in that, Several high-temperature heating wires are interspersed in the heating fins, and the heating fins are made of one of the following materials: copper, aluminum, cast iron, stainless steel, or alloy.

9. The finned constant temperature heating device according to claim 7, characterized in that, The heating system also includes a temperature zone master controller and a busbar, a conduction zone, an electrical signal conduction line, and an independent heating controller that are electrically connected in sequence to the temperature zone master controller. The temperature zone master controller has at least two independent busbars on both sides. Each busbar is individually connected to the conduction zone. The conduction zone is connected to the independent heating controller in sequence through at least two electrical signal conduction lines. Each independent heating controller is connected to a corresponding high-temperature heating wire.

10. The finned constant temperature heating device according to claim 7, characterized in that, The airflow system includes an air inlet, an air outlet, an airflow duct, an airflow solenoid valve, a pressure sensor controller, a pressure relief valve, an exhaust fan, an intake fan, and a constant flow duct.

11. The finned constant temperature heating device according to claim 10, characterized in that, Each temperature zone has an air inlet and an air outlet at its bottom and top, respectively. The air inlet is connected to the air intake fan through at least two airflow pipes, and the air outlet is connected to the exhaust fan through at least two airflow pipes. Each airflow pipe is equipped with an airflow solenoid valve. Each airflow valve is independent of each other and controls the branch of the airflow pipe it is responsible for.

12. The finned constant temperature heating device according to claim 10, characterized in that, Each temperature zone has at least two intake fans, which are symmetrically arranged on both sides of the sample transport track and at the bottom outer side of the heating fins; each temperature zone also has at least two exhaust fans, which are symmetrically arranged on both sides of the sample transport track and at the top outer side of the heating fins.

13. The finned constant temperature heating device according to claim 2 or 10, characterized in that, A constant flow pipe is also installed in the high-temperature drying zone, and at least two of the constant flow pipes are respectively connected to the exhaust fan and the intake fan on the same side.

14. The finned constant temperature heating device according to claim 10, characterized in that, The pressure sensor controller and pressure relief valve are located at the bottom of each temperature zone.

Images