Switchable multi-purpose stove

Abstract

The utility model provides a kind of switchable multi-purpose furnace, it is related to brazing equipment field, including sealed cavity, heating drying mechanism, nitrogen replacement mechanism and atmosphere cooling mechanism, this patent is integrated into single sealed cavity by heating drying, nitrogen replacement and atmosphere cooling function, using the use state design of switchable between each mechanism, the combination of traditional multiple independent furnace body function of single equipment is achieved, enterprise need no longer for drying furnace, nitrogen replacement furnace and cooling furnace respectively plan site and purchase equipment, and then significantly save floor area and initial investment cost;Product only needs to complete brazing before and after the key process in a main cavity, reduces the transport frequency and link waiting time of product between different furnace body, help to improve overall production efficiency, market value is big.

Description

Technical Field

[0001] This utility model relates to the field of brazing equipment, and in particular to a switchable multi-purpose furnace. Background Technology

[0002] Existing brazing systems typically consist of a series of production lines connected in series. These lines, in sequence according to the production process, include a drying furnace, a nitrogen-purging furnace, a brazing furnace, and a cooling furnace. Specifically, as described in the patent title "Gas-Purpose Controlled Atmosphere Protected Convection Heating Aluminum Brazing Multi-Chamber Furnace and Method of Use," patent application number CN202111271479.9, it details a gas-purpose controlled atmosphere protected convection heating aluminum brazing multi-chamber furnace and its method of use. This technology relates to the field of aluminum brazing production equipment, mainly including a conveying device, a drying furnace, a gas-purpose controlled atmosphere protected convection heating aluminum brazing multi-chamber furnace, and an air rapid cooling chamber. Among them, the structure of the gas-purpose controlled atmosphere protected convection heating aluminum brazing multi-chamber furnace is relatively complex, including an outer furnace door, a gas-purpose waiting chamber, a convection heating aluminum brazing chamber, and a gas-purpose atmosphere cooling chamber.

[0003] However, such conventional brazing systems have some significant problems in practical applications. First, they occupy a large area and have a complex structure, leading to high costs for enterprises during purchase and installation. Second, operating and maintaining these devices also requires substantial financial and human resources, further increasing operating costs. Therefore, effectively addressing these issues, reducing the footprint and complexity of brazing systems, and thus lowering purchase and operating costs for enterprises, has become a crucial issue that urgently needs to be addressed by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a switchable multi-purpose furnace. This patent integrates heating and drying, nitrogen replacement and atmosphere cooling functions into a single sealed cavity. By utilizing the switchable use state design between the various mechanisms, it achieves the combination of functions of a single device that is equivalent to multiple independent furnaces in traditional systems. Enterprises no longer need to plan sites and purchase equipment for drying furnaces, nitrogen replacement furnaces and cooling furnaces separately, thereby significantly saving land area and initial investment costs.

[0005] This utility model is achieved through the following technical solution: A switchable multi-purpose furnace includes a sealed cavity, a heating and drying mechanism, a nitrogen purging mechanism, and an atmosphere cooling mechanism. The front side of the cavity has an openable and closable inlet, and the rear side of the cavity is openable and closable connected to the inlet of a brazing furnace. A circulating fan is provided on the side wall of the cavity. A conveying mechanism is provided inside the cavity for conveying products. The heating and drying mechanism is used to heat and dry the products inside the cavity. The nitrogen purging mechanism is used to purge the gas inside the cavity with nitrogen. The atmosphere cooling mechanism is used to cool the products inside the cavity. The heating and drying mechanism, the nitrogen purging mechanism, and the atmosphere cooling mechanism can be switched between operating states.

[0006] As can be seen, the above technical solution integrates heating and drying, nitrogen purging, and atmosphere cooling functions into a single sealed cavity. By utilizing the switchable operating states of each mechanism, it achieves the merging of functions of multiple independent furnaces in a single device. Enterprises no longer need to plan sites and purchase equipment separately for drying furnaces, nitrogen purging furnaces, and cooling furnaces, thus significantly saving floor space and initial investment costs. By realizing multiple processes with a single device, the layout of the entire brazing production line is more compact and flexible, making it particularly suitable for space-constrained production workshops, improving equipment integration and space utilization. Products only need to complete the key processes before brazing (drying and nitrogen purging) and after brazing (atmosphere cooling) in one main cavity, reducing the number of times products are transferred between different furnaces and the waiting time between connections, which helps to improve overall production efficiency.

[0007] According to the above technical solution, preferably, the heating and drying mechanism includes a heating unit, a first pipeline, an exhaust fan, and a second pipeline. The heating unit is arranged inside the cavity and is used to heat the product. Both the first and second pipelines are connected to the inside of the cavity. The exhaust fan is arranged on the second pipeline. A pneumatic angle valve is provided on the first pipeline, and a first pneumatic butterfly valve is provided on the second pipeline. When the product enters the cavity to perform the heating and drying procedure, both the pneumatic angle valve and the first pneumatic butterfly valve are opened, and fresh air enters the cavity along the first pipeline. The circulating fan starts, and the air in the cavity is heated by the heating unit to form a hot air circulation, which dries the product evenly. At the same time, the exhaust fan on the second pipeline runs to discharge the hot and humid waste gas from the cavity, realizing airflow replacement. When the drying procedure is completed, the pneumatic angle valve and the first pneumatic butterfly valve are closed.

[0008] As can be seen, the above technical solution effectively achieves the active discharge of humid and hot exhaust gas during the drying process by setting up the first and second pipelines, and cooperating with the exhaust fan, pneumatic angle valve and the first pneumatic butterfly valve. At the same time, it replenishes fresh and dry air. This not only effectively improves the drying efficiency, but also avoids the accumulation of water vapor in the cavity, creating favorable conditions for the subsequent nitrogen replacement process.

[0009] According to the above technical solution, preferably, the nitrogen replacement mechanism includes a nitrogen injection port connected to the cavity. When the heating and drying process is completed and the nitrogen replacement process is executed, nitrogen enters the cavity through the nitrogen injection port. The pneumatic angle valve opens to discharge the original air in the cavity through the first pipeline. At the same time, the circulating fan runs to make the nitrogen evenly distributed in the cavity, so that an oxygen-free environment is formed in the cavity. When the nitrogen replacement is completed, the nitrogen injection port reduces the input to maintain a stable nitrogen environment in the cavity.

[0010] As can be seen, the above technical solution effectively utilizes the first pipeline and the circulating fan to achieve the exhaust and gas mixing functions during nitrogen replacement. This avoids the need to set up a separate exhaust and circulation system for nitrogen replacement, further simplifying the equipment structure and reducing manufacturing costs. The nitrogen replacement procedure is seamlessly connected with the drying procedure, and the process can be directly switched to the nitrogen replacement procedure after drying, making the process continuous and effectively reducing intermediate steps.

[0011] According to the above technical solution, preferably, the atmosphere cooling mechanism includes a cooling pipeline, a heat exchanger, and a second pneumatic butterfly valve. The inlet of the cooling pipeline is connected to the second pipeline, the outlet of the cooling pipeline is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the first pipeline. When the product is brazed and enters the cavity to perform the atmosphere cooling procedure, the second pneumatic butterfly valve opens, the pneumatic angle valve and the first pneumatic butterfly valve close, the exhaust fan and the circulating fan start, and the hot gas in the cavity enters the heat exchanger through the second pipeline and the cooling pipeline. In the heat exchanger, it exchanges heat with the external cooling medium. The gas with reduced temperature returns to the cavity through the first pipeline, forming a cooling cycle.

[0012] As can be seen, in the above technical solution, by switching valves, the passage originally used for exhaust gas is transformed into a cooling circulation loop, which greatly improves the utilization rate of components, makes the three major functional systems highly integrated, and greatly improves the structural compactness; by using a heat exchanger to forcibly cool the hot gas in the cavity and circulate it back into the cavity, rapid and uniform cooling of the product can be achieved.

[0013] According to the above technical solution, preferably, it also includes a PLC central controller, which is signal-connected to the pneumatic angle valve, the first pneumatic butterfly valve, the second pneumatic butterfly valve, the circulating fan, and the exhaust fan.

[0014] According to the above technical solution, preferably, the heating unit adopts electric heating by thermocouple or gas heating.

[0015] The beneficial effects of this utility model are: (1) This patent integrates heating drying, nitrogen replacement and atmosphere cooling functions into a single sealed cavity. By utilizing the switchable use state design between the various mechanisms, it achieves the merging of the functions of a single device with the traditional multiple independent furnace bodies. Enterprises no longer need to plan sites and purchase equipment for drying furnaces, nitrogen replacement furnaces and cooling furnaces separately, thereby significantly saving land area and initial investment costs. (2) This patent realizes multiple processes through a single device, making the layout of the entire brazing production line more compact and flexible, especially suitable for production workshops with limited space, improving equipment integration and space utilization; (3) The products produced by this patent only need to complete the key processes of pre-brazing (drying, nitrogen replacement) and post-brazing (atmosphere cooling) in one main cavity, which reduces the number of transfers and connection waiting time between different furnaces and helps to improve the overall production efficiency. Attached Figure Description

[0016] Figure 1 A front view structural schematic diagram according to an embodiment of the present invention is shown; Figure 2 A rear view structural schematic diagram according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the operation during heating and drying according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the operation under nitrogen purging according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of operation under atmospheric cooling according to an embodiment of the present invention is shown; Explanation of reference numerals in the attached figures: 1. Cavity; 2. Brazing furnace; 3. Circulating fan; 4. Conveying mechanism; 5. Heating unit; 6. First pipeline; 7. Exhaust fan; 8. Second pipeline; 9. Pneumatic angle valve; 10. First pneumatic butterfly valve; 11. Nitrogen injection port; 12. Cooling pipeline; 13. Heat exchanger; 14. Second pneumatic butterfly valve. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the 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. Therefore, they should not be construed as limitations on the utility model.

[0019] As shown in the figure, this utility model provides a switchable multi-purpose furnace, including a sealed cavity 1, a heating and drying mechanism, a nitrogen purging mechanism, and an atmosphere cooling mechanism. The front of the cavity 1 has an openable and closable inlet, and the rear of the cavity 1 is connected to the inlet of a brazing furnace 2. A circulating fan 3 is provided on the side wall of the cavity 1. A conveying mechanism 4 is provided inside the cavity 1 for conveying products. The heating and drying mechanism is used to heat and dry the products inside the cavity 1. The nitrogen purging mechanism is used to purge the gas inside the cavity 1 with nitrogen. The atmosphere cooling mechanism is used to cool the products inside the cavity 1. The heating and drying mechanism, nitrogen purging mechanism, and atmosphere cooling mechanism can be switched between operating states, integrating heating and drying, nitrogen purging, and atmosphere cooling functions into a single unit. Within the sealed chamber 1, the switchable operating states of each mechanism enable the integration of the functions of multiple traditional independent furnaces into a single device. Enterprises no longer need to plan sites and purchase equipment separately for drying furnaces, nitrogen replacement furnaces, and cooling furnaces, thus significantly saving floor space and initial investment costs. By implementing multiple processes with a single device, the layout of the entire brazing production line becomes more compact and flexible, making it particularly suitable for space-constrained production workshops, improving equipment integration and space utilization. Products only need to complete the key processes before brazing (drying and nitrogen replacement) and after brazing (atmosphere cooling) within a single main chamber 1, reducing the number of times products are transferred between different furnaces and the waiting time between connections, which helps to improve overall production efficiency.

[0020] Optionally, in one possible implementation, the heating and drying mechanism includes a heating unit 5, a first pipeline 6, an exhaust fan 7, and a second pipeline 8. The heating unit 5 is disposed inside the cavity 1 and is used to heat the product. Both the first pipeline 6 and the second pipeline 8 are connected to the interior of the cavity 1. The exhaust fan 7 is disposed on the second pipeline 8. A pneumatic angle valve 9 is provided on the first pipeline 6, and a first pneumatic butterfly valve 10 is provided on the second pipeline 8. When the product enters the cavity 1 to perform the heating and drying procedure, both the pneumatic angle valve 9 and the first pneumatic butterfly valve 10 are opened, and fresh air enters the cavity 1 along the first pipeline 6. The circulating fan 3 is started, and the cavity 1 is filled with fresh air. After being heated by the heating unit 5, the air forms a hot air circulation, which dries the product evenly. At the same time, the exhaust fan 7 on the second pipeline 8 operates to discharge the hot and humid waste gas from the cavity 1, realizing airflow replacement. When the drying process is completed, the pneumatic angle valve 9 and the first pneumatic butterfly valve 10 are closed. By setting the first pipeline 6 and the second pipeline 8, and cooperating with the exhaust fan 7, the pneumatic angle valve 9 and the first pneumatic butterfly valve 10, the system effectively discharges the hot and humid waste gas during the drying process and replenishes fresh dry air. This not only effectively improves the drying efficiency, but also avoids the accumulation of water vapor in the cavity 1, creating favorable conditions for the subsequent nitrogen replacement process.

[0021] Optionally, in one possible implementation, the nitrogen purging mechanism includes a nitrogen injection port 11 communicating with the cavity 1. When the heating and drying process is completed and the nitrogen purging process is executed, nitrogen enters the cavity 1 through the nitrogen injection port 11. The pneumatic angle valve 9 opens and controls the opening angle to discharge the original air in the cavity 1 along the first pipeline 6. At the same time, the circulating fan 3 operates to ensure that the nitrogen is evenly distributed in the cavity 1, creating an oxygen-free environment. After the nitrogen purging is completed, the nitrogen injection port 11 reduces the input to maintain a stable nitrogen environment in the cavity 1. This effectively utilizes the first pipeline 6 and the circulating fan 3 to achieve the exhaust and gas mixing functions during nitrogen purging. This avoids the need to set up a separate exhaust and circulation system for nitrogen purging, further simplifying the equipment structure and reducing manufacturing costs. The nitrogen purging process is seamlessly connected to the drying process; after drying, the process can be directly switched to the nitrogen purging process, making the process continuous and effectively reducing intermediate steps.

[0022] Optionally, in one possible implementation, the atmosphere cooling mechanism includes a cooling pipe 12, a heat exchanger 13, and a second pneumatic butterfly valve 14. The inlet of the cooling pipe 12 is connected to the second pipe 8, the outlet of the cooling pipe 12 is connected to the inlet of the heat exchanger 13, and the outlet of the heat exchanger 13 is connected to the first pipe 6. When the product is brazed and enters the cavity 1 to perform the atmosphere cooling procedure, the second pneumatic butterfly valve 14 opens, the pneumatic angle valve 9 and the first pneumatic butterfly valve 10 close, the exhaust fan 7 and the circulating fan 3 start, and the hot air in the cavity 1 is cooled by... The second pipe 8 and the cooling pipe 12 enter the heat exchanger 13, where they exchange heat with the external cooling medium. The cooled gas then returns to the cavity 1 via the first pipe 6, forming a cooling cycle. This patent transforms the original exhaust gas passage into a cooling cycle loop by switching valves, greatly improving component utilization and enabling high integration of the three major functional systems, thus significantly improving structural compactness. By forcibly cooling the hot gas in the cavity 1 through the heat exchanger 13 and circulating it back to the cavity 1, rapid and uniform cooling of the product can be achieved.

[0023] Optionally, in one possible implementation, a PLC central controller is also included. The PLC central controller is connected to the pneumatic angle valve 9, the first pneumatic butterfly valve 10, the second pneumatic butterfly valve 14, the circulating fan 3, and the exhaust fan 7. In this embodiment, the drying stage uses thermocouples to control the furnace temperature and a timed method after the set temperature is reached to control the drying time. In the nitrogen replacement stage, the cavity is connected to a sampling system through pipelines, and the oxygen content is measured by an oxygen analyzer. When the required oxygen content is reached, the nitrogen replacement process is considered complete. In the atmosphere cooling stage, the atmosphere cooling time is controlled by thermocouple readings and a timed method.

[0024] Optionally, in one possible implementation, the heating unit 5 employs electric heating via thermocouples or gas heating.

[0025] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A switchable multi-purpose furnace, characterized in that, The device includes a sealed cavity, a heating and drying mechanism, a nitrogen purging mechanism, and an atmosphere cooling mechanism. The front side of the cavity has an openable and closable inlet, and the rear side of the cavity is connected to the inlet of a brazing furnace. A circulating fan is provided on the side wall of the cavity. A conveying mechanism is provided inside the cavity for conveying products. The heating and drying mechanism is used to heat and dry the products inside the cavity. The nitrogen purging mechanism is used to purge the gas inside the cavity with nitrogen. The atmosphere cooling mechanism is used to cool the products inside the cavity. The heating and drying mechanism, the nitrogen purging mechanism, and the atmosphere cooling mechanism can be switched between operating states.

2. The switchable multi-purpose furnace according to claim 1, characterized in that, The heating and drying mechanism includes a heating unit, a first pipeline, an exhaust fan, and a second pipeline. The heating unit is installed inside the cavity and is used to heat the product. Both the first and second pipelines are connected to the inside of the cavity. The exhaust fan is installed on the second pipeline. The first pipeline is equipped with a pneumatic angle valve, and the second pipeline is equipped with a first pneumatic butterfly valve. When the product enters the cavity to perform the heating and drying procedure, both the pneumatic angle valve and the first pneumatic butterfly valve are opened, and fresh air enters the cavity along the first pipeline. The circulating fan starts, and the air inside the cavity is heated by the heating unit to form a hot air circulation, which dries the product evenly. At the same time, the exhaust fan on the second pipeline runs to discharge the hot and humid waste gas from the cavity, realizing airflow replacement. When the drying procedure is completed, the pneumatic angle valve and the first pneumatic butterfly valve are closed.

3. A switchable multi-purpose furnace according to claim 2, characterized in that, The nitrogen replacement mechanism includes a nitrogen injection port connected to the cavity. When the heating and drying process is completed and the nitrogen replacement process is executed, nitrogen enters the cavity through the nitrogen injection port. The pneumatic angle valve opens to discharge the original air in the cavity through the first pipeline. At the same time, the circulating fan runs to make the nitrogen evenly distributed in the cavity, so that an oxygen-free environment is formed in the cavity. After the nitrogen replacement is completed, the nitrogen injection port reduces the input to maintain a stable nitrogen environment in the cavity.

4. A switchable multi-purpose furnace according to claim 3, characterized in that, The atmosphere cooling mechanism includes a cooling pipeline, a heat exchanger, and a second pneumatic butterfly valve. The inlet of the cooling pipeline is connected to the second pipeline, the outlet of the cooling pipeline is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the first pipeline. When the product is brazed and enters the cavity to perform the atmosphere cooling procedure, the second pneumatic butterfly valve opens, the pneumatic angle valve and the first pneumatic butterfly valve close, and the exhaust fan and the circulating fan start. The hot gas in the cavity enters the heat exchanger through the second pipeline and the cooling pipeline, where it exchanges heat with the external cooling medium. The gas, after its temperature is reduced, returns to the cavity through the first pipeline, forming a cooling cycle.

5. A switchable multi-purpose furnace according to claim 4, characterized in that, It also includes a PLC central controller, which is connected to the pneumatic angle valve, the first pneumatic butterfly valve, the second pneumatic butterfly valve, the circulating fan, and the exhaust fan via signal connection.

6. A switchable multi-purpose furnace according to claim 2, characterized in that, The heating unit uses either thermocouple electric heating or gas heating.

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