Tunnel oven with air make-up device

Abstract

The application discloses a tunnel oven with a make-up air device, which comprises an oven body provided with a tunnel baking channel, the tunnel baking channel is formed with a cavity for accommodating a PCB film coating, the top of the oven body is provided with an exhaust port for connecting the cavity with the outside; the make-up air device is arranged on the top of the oven body and is spaced apart from the oven body, the make-up air device is provided with a supply air pipeline, the supply air pipeline is connected with the cavity through the exhaust port, and the make-up air device is used for actively conveying high-temperature fresh air at a preset temperature to the cavity through the supply air pipeline; wherein the temperature of the space where the oven body is located is lower than the temperature of the space where the make-up air device is located. The application actively conveys high-temperature fresh air to the cavity formed by the tunnel baking channel through the make-up air device, reduces the consumption of cold air of the space where the oven body is located, reduces the temperature difference required by the tunnel baking channel to be heated, and further reduces the power consumption of the tunnel oven, improves the energy utilization efficiency, and realizes energy saving and consumption reduction.

Description

Technical Field

[0001] This application relates to the technical field of PCB board processing equipment, and in particular to a tunnel oven with a make-up air device. Background Technology

[0002] In the PCB (Printed Circuit Board) manufacturing process, the drying and curing stages after coating typically require the use of tunnel ovens. Traditional PCB coating tunnel ovens, when operating within a cleanroom, need to continuously heat the ambient air from 22°C to 190°C before releasing it into the atmosphere. This process not only consumes a significant amount of cleanroom cooling air but also increases the energy consumption for electric heating, resulting in high overall energy consumption.

[0003] Furthermore, existing tunnel ovens typically draw cold air directly from the environment for heating. This method continuously consumes the cold air within the cleanroom during the heating process and requires additional electricity to heat the air to the required temperature. This direct air extraction method is not only inefficient but also leads to significant energy waste during frequent heating and cooling processes, increasing production costs.

[0004] To overcome the shortcomings of existing technologies, this invention proposes a tunnel oven with a make-up air device, aiming to achieve a more efficient and energy-saving make-up air solution for PCB coating tunnel ovens, so as to meet the requirements of energy saving and environmental protection in modern PCB production. Utility Model Content

[0005] The purpose of this application is to provide a tunnel oven with a make-up air device to solve the above-mentioned technical problems existing in the prior art.

[0006] This application provides a tunnel oven with a make-up air device, the tunnel oven comprising:

[0007] The enclosure has a tunnel baking channel, which forms a chamber for containing PCB coating. The top of the enclosure has an exhaust port for connecting the chamber to the outside.

[0008] The air supply device is located on the top of the enclosure and spaced apart from the enclosure. The air supply device is equipped with an air supply duct, which is connected to the chamber through an exhaust port. The air supply device is used to actively deliver high-temperature fresh air at a preset temperature to the chamber through the air supply duct. The temperature of the space where the enclosure is located is lower than the temperature of the space where the air supply device is located.

[0009] Furthermore, the tunnel oven is further equipped with an exhaust duct, one end of which is fixed to the exhaust port, and the other end of which protrudes from the air supply duct.

[0010] Furthermore, the diameter of the air supply duct is larger than that of the exhaust duct.

[0011] Furthermore, the tunnel oven also includes a negative pressure sensor, which is used to measure and monitor negative pressure. The air supply device adjusts the air volume based on the detection results of the negative pressure sensor to control the air supply volume to be less than the exhaust volume.

[0012] Furthermore, the air supply device includes a heater and a fan. The heater is used to heat the air in the space where the air supply device is located to a preset temperature, and the fan is used to deliver the heated high-temperature fresh air to the chamber; wherein, the preset temperature is 50°C.

[0013] Furthermore, multiple adjacent chambers can be formed within the tunnel baking channel, with each chamber having a corresponding exhaust port and an exhaust duct, so that each chamber is connected to the air supply duct.

[0014] Furthermore, the tunnel oven also includes a temperature sensor, which is used to detect the internal temperature of the chamber and adjust the air supply volume of the air supply device according to the detection result; wherein, the internal temperature of each chamber is different.

[0015] Furthermore, the tunnel oven also includes a control system, which is electrically connected to the air supply device and the temperature sensor, and is used to control the working status of the air supply device based on the detection results of the temperature sensor.

[0016] Furthermore, the control system includes a processor and a memory. The memory stores preset temperature thresholds and control programs, and the processor controls the working state of the air supply device based on the control programs and the detection results of the temperature sensors.

[0017] Furthermore, a regulating valve is installed on the exhaust duct, and the air supply device adjusts the air volume of the high-temperature fresh air through the regulating valve.

[0018] Unlike existing technologies, the tunnel oven of this application consists of a chamber and a make-up air device. The chamber is equipped with a tunnel baking channel, which forms a cavity for accommodating PCB coating. The make-up air device connects to the cavity through an air supply duct and an exhaust port on the top of the chamber to actively deliver high-temperature fresh air at a preset temperature into the cavity. Since the temperature of the space where the chamber is located is lower than the temperature of the space where the make-up air device is located, the active delivery of high-temperature fresh air by the make-up air device reduces the consumption of cold air in the space where the chamber is located. It also reduces the temperature difference that the tunnel baking channel needs to heat, thereby reducing the power consumption of the tunnel oven. This not only improves energy efficiency but also reduces the dependence of the chamber on the cold air in the space where it is located, achieving the goal of energy saving and consumption reduction.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of a tunnel oven with a make-up air device according to this application;

[0022] Icon labels:

[0023] 1-Box body; 11-Tunnel baking passage; 12-Cavity; 2-Make-up air device; 21-Air supply duct; 3-Exhaust duct. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this application, the tunnel oven with a make-up air device provided in this application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It is understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0026] Existing tunnel ovens require drawing cold air from the environment for heating, which continuously consumes the cold air in the cleanroom during the heating process and requires additional electricity to heat the cold air to the required high temperature. This direct air extraction method is not only inefficient but also leads to significant energy waste and increased production costs due to frequent heating and cooling processes. This application provides a tunnel oven with a make-up air device. The make-up air device and the oven body are located in different environmental spaces. The make-up air device actively supplies high-temperature fresh air to the chamber inside the oven, reducing the oven's consumption of the 22°C cold air from the cleanroom, thereby reducing the tunnel oven's power consumption, improving energy efficiency, and achieving the goal of energy conservation and consumption reduction.

[0027] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of an embodiment of the tunnel oven with a make-up air device according to this application. The tunnel oven with a make-up air device according to this application includes a box body 1, a make-up air device 2, and an exhaust duct 3.

[0028] Specifically, the housing 1 of this application is provided with a tunnel baking channel 11, which forms a chamber 12 for containing the PCB coating. An exhaust port is provided on the top of the housing 1, connecting the chamber 12 to the outside. The exhaust port is used to discharge hot air generated by the tunnel baking channel 11 heating the internal gases. Optionally, the exhaust port in this embodiment can also be used to discharge solvents evaporated from the coating during the heating process.

[0029] Optionally, in this embodiment, the box 1 is installed in a clean room, and the temperature inside the clean room is maintained at 22°C, that is, the temperature of the space where the box 1 is located is 22°C.

[0030] In this embodiment, multiple adjacent chambers 12 can be formed within the tunnel baking channel 11, and the internal temperature of each chamber 12 may be the same or different. Optionally, multiple chambers 12 with the same internal temperature can extend the coating time of the PCB board located in the chamber 12, and can be selected according to the material or thickness. Optionally, multiple chambers 12 with different internal temperatures can be used to perform different operations in the PCB board coating process, such as serving as a preheating zone, a heating zone, a curing zone, and a cooling zone, etc.

[0031] The make-up air device 2 of this application is installed on the top of the housing 1 and spaced apart from the housing 1. The make-up air device 2 can be installed in the ceiling of the clean room. The space in which the make-up air device 2 is located is the atmosphere, which has a different temperature from the clean room and should be higher than the clean room temperature. That is, the temperature of the space in which the housing 1 is located is lower than the temperature of the space in which the make-up air device 2 is located.

[0032] Specifically, the air supply device 2 is equipped with an air supply duct 21, which connects to the chamber 12 through an exhaust port. The air supply device 2 is used to actively deliver high-temperature fresh air at a preset temperature to the chamber 12 through the air supply duct 21. The preset temperature is 50°C.

[0033] Optionally, the air supply device 2 in this embodiment may include a heater and a fan. The heater is used to heat the air in the space where the air supply device 2 is located to a preset temperature, and the fan is used to deliver the heated high-temperature fresh air to the chamber 12.

[0034] In this application, one end of the exhaust duct 3 is fixed to the exhaust port, and the other end of the exhaust duct 3 protrudes from the supply duct 21. The diameter of the supply duct 21 is larger than the diameter of the exhaust duct 3.

[0035] Optionally, the exhaust duct 3 in this embodiment is equipped with a regulating valve, and the air supply device 2 can adjust the air volume of the high-temperature fresh air through the regulating valve.

[0036] Optionally, since multiple adjacent chambers 12 can be formed in the tunnel baking channel 11 of this embodiment, each chamber 12 is provided with an exhaust port and an exhaust pipe 3, so that each chamber 12 is connected to the air supply pipe 21, so that different chambers 12 can exhaust air to the outside respectively.

[0037] The tunnel oven of this application is also equipped with a negative pressure sensor, which is used to measure and monitor negative pressure. The air supply device 2 adjusts the air supply volume based on the detection result of the negative pressure sensor to control the air supply volume to be less than the exhaust volume.

[0038] Optionally, a negative pressure sensor can be installed inside the air supply duct 21 and near the opening of the exhaust duct 3. The tunnel oven uses the negative pressure sensor to monitor the air supply volume of the air supply duct 21 and the air extraction volume of the exhaust duct 3, ensuring that the air supply volume is slightly less than the air extraction volume. This prevents the high-temperature fresh air from escaping into the clean room when the make-up air device 2 delivers high-temperature fresh air to the chamber 12, causing the clean room to consume excess power to maintain the indoor temperature of 22°C.

[0039] The tunnel oven of this application is also equipped with a temperature sensor, which is used to detect the internal temperature of the chamber 12 and adjust the air supply volume of the air supply device 2 according to the detection result.

[0040] Optionally, since multiple adjacent chambers 12 can be formed in the tunnel baking channel 11 of this embodiment, and the internal temperature of all chambers 12 may be different, each chamber 12 can be equipped with a temperature sensor to realize independent temperature detection of each chamber 12 and achieve more precise air volume adjustment.

[0041] The tunnel oven of this application is further equipped with a control system, which is electrically connected to the air supply device 2 and the temperature sensor, and is used to control the working state of the air supply device 2 according to the detection results of the temperature sensor. Optionally, the control system of this embodiment includes a processor and a memory, the memory storing a preset temperature threshold and a control program, and the processor being used to control the working state of the air supply device 2 according to the control program and the detection results of the temperature sensor.

[0042] This application adds an active high-temperature fresh air supply device 2 to the top of the chamber 1, which actively supplies 55°C hot air into the chamber 12 of the tunnel baking channel 11. This allows the tunnel baking channel 11 to be heated to 190°C using 50°C fresh air, reducing the extraction of 22°C cold air from the clean room. This reduces the temperature difference required for heating from 168°C to 140°C, reducing the chamber's consumption of cold air in the surrounding space and also reducing the temperature difference required for heating in the tunnel baking channel 11. This, in turn, reduces the power consumption of the tunnel oven, improving energy efficiency and reducing the chamber's dependence on the surrounding cold air, thus achieving the goal of energy saving and consumption reduction.

[0043] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A tunnel drying oven with a make-up air device, characterized in that, include: The enclosure has a tunnel baking channel forming a chamber for accommodating PCB coating film. The top of the enclosure has an exhaust port for connecting the chamber to the outside. An air supply device is installed on the top of the housing and spaced apart from the housing. The air supply device is equipped with an air supply duct, which is connected to the chamber through the exhaust port. The air supply device is used to actively deliver high-temperature fresh air at a preset temperature to the chamber through the air supply duct. The temperature of the space where the housing is located is lower than the temperature of the space where the air supply device is located.

2. The tunnel oven with a make-up air device according to claim 1, characterized in that, The tunnel oven is further provided with an exhaust duct, one end of which is fixed to the exhaust port, and the other end of which protrudes from the air supply duct.

3. The tunnel oven with a make-up air device according to claim 2, characterized in that, The diameter of the air supply duct is larger than the diameter of the exhaust duct.

4. The tunnel oven with a make-up air device according to claim 3, characterized in that, The tunnel oven also includes a negative pressure sensor, which is used to measure and monitor negative pressure. The air supply device adjusts the air volume based on the detection result of the negative pressure sensor to control the air supply volume to be less than the exhaust volume.

5. The tunnel oven with a make-up air device according to claim 2, characterized in that, The air supply device includes a heater and a fan. The heater is used to heat the air in the space where the air supply device is located to a preset temperature, and the fan is used to deliver the heated high-temperature fresh air to the chamber. The preset temperature is 50°C.

6. The tunnel oven with a make-up air device according to claim 5, characterized in that, Multiple adjacent chambers can be formed within the tunnel baking channel. Each chamber is provided with an exhaust port and an exhaust pipe, so that each chamber is connected to the air supply pipe.

7. The tunnel oven with a make-up air device according to claim 6, characterized in that, The tunnel oven also includes a temperature sensor for detecting the internal temperature of the chamber and adjusting the air supply volume of the air supply device based on the detection result; wherein, the internal temperature of all the chambers is different.

8. The tunnel oven with a make-up air device according to claim 7, characterized in that, The tunnel oven also includes a control system, which is electrically connected to the air supply device and the temperature sensor, and is used to control the working state of the air supply device according to the detection result of the temperature sensor.

9. The tunnel oven with a make-up air device according to claim 8, characterized in that, The control system includes a processor and a memory. The memory stores preset temperature thresholds and control programs. The processor is used to control the working state of the air supply device based on the control programs and the detection results of the temperature sensors.

10. The tunnel oven with a make-up air device according to claim 2, characterized in that, The exhaust duct is equipped with a regulating valve, and the air supply device adjusts the air volume of the high-temperature fresh air through the regulating valve.

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