An oven temperature and humidity adjusting system

Abstract

The utility model discloses an oven temperature and humidity adjusting system, include: oven, temperature and humidity control module and ventilation module, ventilation module includes air intake device, and air intake device is connected with the air inlet of oven, temperature and humidity control module includes heater and humidifier, heater and humidifier are arranged in air intake device respectively, and the air inlet of oven is set up close to humidifier, and heater is set up in humidifier far from the side of oven air inlet, and humidifier and heater are used to heat the airflow generated in air intake device before entering oven first and then carry out humidification. The humidifier in this embodiment is installed behind the heater, first heat the airflow before entering the oven, then carry out humidification treatment, the airflow passes through the humidifier at a high temperature, thereby improving the evaporation efficiency of the sprayed moisture, making the moisture more effectively enter the oven with the airflow to provide the required humidification effect for the oven in time, overcoming the drawbacks of easy to cause water accumulation.

Description

Technical Field

[0001] This utility model relates to the technical field of battery coating and drying systems, and in particular to a temperature and humidity control system for an oven. Background Technology

[0002] In the lithium battery coating machine industry, during the initial coating stage (i.e., the initial coating phase), issues such as over-drying and powdering in the coated area, wrinkling in the blank areas, and even substrate misalignment and tape breakage are common. These problems only subside or disappear after a period of stable coating. In existing common negative electrode coating processes, the coating is dried using forced convection hot air after substrate coating, with the hot air temperature controlled below 100°C. Under these conditions, the coating drying rate is affected by the relative humidity of the surrounding atmosphere. The evaporation of the slurry solvent is driven by both the humidity gradient in the vertical direction (slurry-thermodynamic boundary layer-air direction) and thermal effects. During the initial coating phase, the relative humidity inside the oven is low. As the total slurry evaporation increases during coating, the relative humidity inside the oven gradually increases. Because the oven has certain exhaust and fresh air replenishment functions, the system reaches a steady state after a certain time, and the relative humidity inside the oven increases to a certain value and remains stable. During this process, the initial coating phase has a high slurry solvent drying rate due to the low air humidity and large humidity gradient. As coating time increases, the drying rate gradually decreases to a stable value. However, during the initial coating stage, the coating drying rate exceeds the process window. Excessively high drying rates lead to over-drying and powdering in the coated area, wrinkling in the blank areas, and in severe cases, even substrate misalignment and tape breakage. Existing patent document CN221175291U discloses a closed-loop humidity adjustment system for an oven. This system can effectively avoid product quality problems caused by excessively high or low humidity by adjusting the humidity within the oven. With the airflow direction as the positive direction, the humidification section is located before the heating section. However, a drawback of this design is that the humidification section temperature is relatively low, resulting in a slow droplet evaporation rate, which affects humidification efficiency and easily leads to water accumulation. Utility Model Content

[0003] This utility model discloses an oven temperature and humidity adjustment system to solve the problem that the low temperature of the humidification section leads to a slow droplet evaporation rate, which in turn affects the humidification efficiency and easily causes water accumulation.

[0004] This utility model provides a temperature and humidity adjustment system for an oven, including: an oven, a temperature and humidity control module, and a ventilation module;

[0005] The ventilation module includes an air inlet device, which is connected to the air inlet of the oven;

[0006] The temperature and humidity control module includes a heater and a humidifier. The heater and the humidifier are respectively installed in the air inlet device. The humidifier is located near the air inlet of the oven, and the heater is located on the side of the humidifier away from the air inlet of the oven. The humidifier and the heater are used to heat the airflow generated in the air inlet device before it enters the oven and then humidify it.

[0007] Furthermore, the air inlet device is also equipped with a filter, which is located on the side of the humidifier away from the air inlet of the oven. The filter is used to filter the airflow before humidification to prevent the moisture from the humidifier from wetting the filter element and causing it to stick together.

[0008] Furthermore, the ventilation module also includes a return air device, which is connected to the first air outlet of the oven and the air inlet device. The return air device is used to collect the airflow that has passed through the drying process in the oven and discharges from the first air outlet, and inputs the discharged airflow into the air inlet device to realize airflow recycling.

[0009] Furthermore, the filter is disposed between the humidifier and the heater, and the filter is used to filter the airflow heated by the heater to prevent the moisture carried by the airflow from wetting the filter element.

[0010] Furthermore, the ventilation module also includes an exhaust device, which is connected to the second air outlet of the oven;

[0011] The temperature and humidity control module also includes a humidity detector, which is located inside the exhaust device and near the second air outlet. The humidity detector is connected to the humidifier and is used to detect the humidity value of the airflow that passes through the drying process inside the oven and is output from the second air outlet of the oven. The humidity value is then sent to the humidifier so that the humidifier adjusts the amount of liquid water applied according to the humidity value.

[0012] Furthermore, the temperature and humidity control module also includes a temperature detector, which is located near the air inlet and connected to the heater. The temperature detector is used to detect the temperature value of the airflow after humidification by the humidifier and send it to the heater, so that the heater adjusts the heating temperature according to the temperature value.

[0013] Furthermore, the humidifier includes a water supply unit, a gas compressor, and a nozzle. The water outlet of the water supply unit and the air outlet of the gas compressor are connected to the nozzle. The gas compressor is used to provide air compression kinetic energy to disperse the liquid water in the water supply unit into droplets, which are then sprayed onto the heated airflow through the nozzle.

[0014] Furthermore, the water supply device includes a flow control valve, the gas compressor includes a pressure control valve, and the humidity detector is connected to the flow control valve of the water supply device and the pressure control valve of the gas compressor respectively. The pressure control valve is used to adjust the compressed gas flow rate and thus adjust the size of the droplets, and the flow control valve is used to adjust the water supply.

[0015] Furthermore, the water supply device also includes a water storage tank and a first ball valve, and the gas compressor includes an air storage tank and a second ball valve. The first ball valve is disposed between the water storage tank and the flow control valve, and is used to seal between the water storage tank and the flow control valve when closed. The second ball valve is disposed between the air storage tank and the pressure control valve, and is used to seal between the air storage tank and the pressure control valve when closed.

[0016] Furthermore, the liquid water provided by the water supply device is deionized water.

[0017] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages: In this embodiment, the humidifier is installed after the heater, first heating the airflow before it enters the oven, and then humidifying it. The airflow passes through the humidifier at a higher temperature, thereby improving the evaporation efficiency of the sprayed water, allowing the water to more effectively enter the oven with the airflow and provide the required humidification effect in a timely manner. In addition, because the airflow is at a higher temperature after heating, the water evaporation efficiency is improved when it flows through the humidifier, and the water fully enters the oven with the airflow. Therefore, water is less likely to accumulate in the ventilation device, and water resources are not wasted due to unevaporated water. Therefore, this embodiment overcomes the disadvantages of the prior art, which places the humidification section before the heating section, resulting in a lower airflow temperature, lower water evaporation rate, lower humidification efficiency, and a tendency to accumulate water. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0019] Figure 1 This is a schematic diagram of the structure of an oven temperature and humidity adjustment system provided in an embodiment of the present utility model;

[0020] Explanation of reference numerals in the attached drawings: 1. Oven; 2. Air inlet device; 3. Air inlet; 4. Heater; 5. Humidifier; 6. Filter; 7. Return air device; 8. First air outlet; 9. Exhaust device; 10. Second air outlet; 11. Humidity detector; 12. Temperature detector; 13. Flow control valve; 14. Pressure control valve; 15. First ball valve; 16. Second ball valve; 17. Switch valve; 18. Water tank; 19. Air tank; 20. Controller; 21. Fan; 22. Fresh air device. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 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. Therefore, they should not be construed as limitations on this utility model.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0025] This utility model discloses a temperature and humidity adjustment system for an oven.

[0026] Please see Figure 1 One embodiment of the oven temperature and humidity adjustment system provided in this utility model includes: an oven 1, a temperature and humidity control module, and a ventilation module;

[0027] The ventilation module includes an air inlet device 2, which is connected to the air inlet 3 of the oven 1;

[0028] The temperature and humidity control module includes a heater 4 and a humidifier 5. The heater 4 and the humidifier 5 are respectively installed in the air inlet device 2. The humidifier 5 is installed near the air inlet 3 of the oven 1, and the heater 4 is installed on the side of the humidifier 5 away from the air inlet 3 of the oven 1. The humidifier 5 and the heater 4 are used to heat the airflow generated in the air inlet device 2 before it enters the oven 1 and then humidify it.

[0029] Understandably, in practical implementation, on the one hand, during the negative electrode coating process, the solvents (such as water, NMP, etc.) contained in the slurry need to be evaporated by heating. In this embodiment, the airflow in the air inlet device 2 is heated by the heater 4. When the heated airflow enters the oven 1, the temperature inside the oven 1 rises, causing the solvent to evaporate rapidly, thus achieving the drying and curing of the coating. In the initial coating stage, the humidity inside the oven 1 is low, and the coating drying rate is high. An excessively high drying rate can lead to over-drying and powdering in the coated area, wrinkling in the blank areas, and in severe cases, even causing substrate misalignment or tape breakage. Therefore, in this embodiment, the airflow in the air inlet device 2 is humidified. When the humidified airflow enters the oven 1, the humidity inside the oven 1 increases, reducing the evaporation efficiency of the solvent in the initial coating stage, thus avoiding over-drying and powdering in the coated area, wrinkling in the blank areas, and in severe cases, even causing substrate misalignment or tape breakage. On the other hand, in this embodiment, the humidifier 5 is installed after the heater 4. It first heats the airflow before it enters the oven 1, and then humidifies it. The airflow passes through the humidifier 5 at a higher temperature, thereby improving the evaporation efficiency of the sprayed water. This allows the water to enter the oven 1 more effectively with the airflow and provide the required humidification effect to the oven 1 in a timely manner. In addition, because the airflow is at a higher temperature after heating, the water evaporation efficiency is improved when it flows through the humidifier 5. The water fully enters the oven 1 with the airflow, so water is less likely to accumulate in the ventilation device, and water resources are not wasted due to unevaporated water. Therefore, this embodiment overcomes the disadvantages of the prior art, which places the humidification section before the heating section, resulting in a lower airflow temperature, lower water evaporation rate, lower humidification efficiency, and a tendency to accumulate water.

[0030] In a more specific embodiment, the air inlet device 2 is also provided with a filter 6. The filter 6 is located on the side of the humidifier 5 away from the air inlet 3 of the oven 1. The filter 6 is used to filter the airflow before humidification to prevent the moisture of the humidifier 5 from wetting the filter element of the filter 6 and causing the filter element to stick.

[0031] Understandably, in specific implementation, this embodiment filters the airflow before the humidifier 5 to minimize the moisture from the humidifier 5 wetting the filter element, preventing filter element adhesion, loss of filtration capacity, and sudden increase in air pipeline pressure drop. It should be noted that the filter 6 in this embodiment filters the airflow within the air inlet device 2, preventing solid pollutants such as dust, particulate matter, and fiber debris from entering the oven 1. If the filter element of filter 6 in this embodiment is wetted, solid pollutants such as dust, particulate matter, and fiber debris will cause the filter element to adhere and lose its filtration capacity. Furthermore, because the filter element adheres, the originally continuous airflow channels within the filter element are divided into numerous tiny, discontinuous gaps, or even completely closed, causing a sudden increase in pressure drop in the air inlet device 2, resulting in unstable airflow in the air inlet device 2 and uneven heating within the oven 1.

[0032] In a more specific embodiment, filter 6 in this example is a dry filter. The impurities that need to be intercepted in the air intake of oven 1 are mainly solid pollutants such as dust, particulate matter, and fiber debris. The dry filter, through mechanisms such as fiber interception, inertial impaction, and diffusion deposition, can achieve a filtration efficiency of primary to medium efficiency (such as G4 and F5 levels) for particles larger than 0.3μm, which is sufficient to prevent impurities from entering oven 1 and contaminating the coating or equipment. The filter element material of the dry filter includes paper fiber or synthetic fiber (such as polyester fiber and nylon fiber). The characteristic of this type of filter element is that it relies on the pores between the fibers for interception and filtration. If it is wetted, the fibers will absorb water and swell, sticking together and causing pore blockage, thereby losing filtration capacity and causing a sharp increase in air pipeline pressure drop.

[0033] In a more specific embodiment, in order to minimize the wetness of the filter element fibers of the filter 6 by the moisture from the humidifier 5, the filter 6 is located outside the spray range of the humidifier 5 and the water spray direction of the humidifier 5 is the same as the airflow direction, so that the moisture from the humidifier 5 cannot come into contact with the filter element of the filter 6.

[0034] In a more specific embodiment, the ventilation module further includes a return air device 7, which is connected to the first air outlet 8 of the oven 1 and to the air inlet device 2. The return air device 7 is used to collect the airflow that has passed through the drying process in the oven 1 and discharges from the first air outlet 8, and inputs the discharged airflow into the air inlet device 2 to realize airflow recycling.

[0035] Understandably, in practice, the airflow collected by the return air device 7 from the first air outlet 8 of the oven 1 has residual heat. After re-entering the air inlet device 2, it can reduce the heating energy consumption of the air inlet device 2.

[0036] In a more specific embodiment, the return air device 7 and the fresh air device 22 are connected together to the air intake device 2 to input airflow into the air intake device 2.

[0037] Understandably, in practice, the return air device 7 recovers the airflow inside the oven 1, mixes it with the fresh air introduced from the fresh air device 22 by the air inlet device 2 in a certain proportion, and then sends it back into the oven 1 to meet the oven 1's airflow requirements.

[0038] In a more specific embodiment, the filter 6 is disposed between the humidifier 5 and the heater 4. The filter 6 is used to filter the airflow heated by the heater 4 to prevent the moisture carried by the airflow from wetting the filter element of the filter 6.

[0039] Understandably, in practice, the airflow introduced into the air intake device 2 from the return air device 7 and the fresh air device 22 contains moisture. The airflow entering the fresh air device 22 is first heated by the heater 4, which effectively removes moisture from the airflow while bringing it to a preset temperature. By filtering the heated airflow, moisture can be prevented from wetting the filter element of the filter 6 to the greatest extent possible, thus avoiding filter element adhesion.

[0040] In a more specific embodiment, the ventilation module further includes an exhaust device 9, which is connected to the second air outlet 10 of the oven 1;

[0041] The temperature and humidity control module also includes a humidity detector 11, which is located inside the exhaust device 9 and near the second air outlet 10. The humidity detector 11 is connected to the humidifier 5 and is used to detect the humidity value of the airflow that passes through the drying process inside the oven 1 and is output from the second air outlet 10 of the oven 1. The humidity value is then sent to the humidifier 5 so that the humidifier 5 can adjust the amount of liquid water applied according to the humidity value.

[0042] Understandably, in practice, on the one hand, by setting up a second air outlet 10 and an exhaust device 9 to collect the airflow that has passed through the drying process inside the oven, and by not connecting it to the air inlet device 2, it is not affected by the airflow from the air inlet device 2, thus more accurately reflecting the overall humidity level inside the oven. On the other hand, the airflow at the outlet is cooled down due to the drying process inside the oven, preventing excessively high temperatures from affecting the operation of the humidity detector 11 and ensuring measurement accuracy.

[0043] It should be noted that not all airflow in the oven 1 can be introduced into the return air device 7 through the second air outlet 10. Only when the humidity detector 11 in the exhaust device 9 at the first air outlet 8 detects that the airflow humidity is lower than the preset value can the airflow in the oven be utilized through the return air device 7. Otherwise, for airflow with high humidity, the heater 4 in the air inlet device 2 cannot dehumidify the airflow sufficiently, affecting the operation of the filter 6 and the humidity control in the oven 1.

[0044] In a more specific embodiment, the temperature and humidity control module further includes a temperature detector 12, which is located near the air inlet 3 and connected to the heater 4. The temperature detector 12 is used to detect the temperature value of the airflow after being humidified by the humidifier 5 and send it to the heater 4 so that the heater 4 can adjust the heating temperature according to the temperature value.

[0045] Understandably, in practice, after the heated airflow is humidified by the humidifier 5, the humidification process will cause the airflow temperature to change. The temperature detector 12 will detect the temperature of the humidified airflow in a timely manner and send the detected temperature value to the heater 4. The heater 4 will adjust the heating temperature according to the temperature value so that the airflow temperature entering the oven 1 meets the requirements and avoids the product yield decrease due to temperature deviation as much as possible.

[0046] In a more specific embodiment, the humidifier 5 includes a water supply unit, a gas compressor, and a nozzle. The water outlet of the water supply unit and the air outlet of the gas compressor are connected to the nozzle. The gas compressor is used to provide air compression kinetic energy to disperse the liquid water in the water supply unit into droplets, which are then sprayed through the nozzle onto the airflow heated by the heater.

[0047] Understandably, in practical implementation, on the one hand, the mist droplets can improve evaporation efficiency and thus enhance humidification. The gas compressor converts liquid water into mist droplets, which are then injected into the airflow heated by the heater. The total surface area of ​​the water increases exponentially; for example, 1 mL of water forming 10 μm mist droplets can have a surface area of ​​6000 cm², about 300 times larger than the original droplets. This larger surface area significantly accelerates the evaporation rate. Simultaneously, the micro-droplets are suspended and dispersed in the airflow, allowing for more thorough contact with the hot air. Driven by the heat energy provided by the high-temperature airflow, the evaporation efficiency is significantly improved, and the humidification effect is also enhanced. On the other hand, in terms of temperature control, micro-droplet evaporation is an isenthalpic humidification process, converting the sensible heat of the airflow into latent heat of vaporization. Due to the extremely small droplet size and short evaporation time, heat exchange is concentrated in a local micro-region, without large-scale temperature diffusion. This helps maintain a stable airflow temperature and effectively avoids large fluctuations in airflow temperature caused by humidification.

[0048] In a more specific embodiment, the water supply includes a flow control valve 13, the gas compressor includes a pressure control valve 14, and the humidity detector 11 is connected to the flow control valve 13 of the water supply and the pressure control valve 14 of the gas compressor, respectively. The pressure control valve 14 is used to adjust the flow rate of the compressed gas and thus adjust the size of the droplets, and the flow control valve 13 is used to adjust the water supply.

[0049] In practice, the water supply is adjusted by the flow control valve 13, and the pressure of the compressed gas is adjusted by the pressure control valve 14. The pressure directly affects the gas flow rate, which in turn determines the droplet size. The water supply determines the humidity of the airflow. Smaller droplets and a larger water supply result in increased humidification; conversely, larger droplets and a smaller water supply result in decreased humidification. Therefore, this embodiment, by adjusting the compressed gas pressure and water supply separately, can precisely control the humidification effect, accurately meet the humidity requirements within the oven 1, and thus improve the coating quality of the product.

[0050] In a more specific embodiment, the water supply device further includes a water reservoir 18 and a first ball valve 15, and the gas compressor includes an air reservoir 19 and a second ball valve 16. The first ball valve 15 is disposed between the water reservoir 18 and the flow control valve 13, and is used to seal between the water reservoir 18 and the flow control valve 13 when closed. The second ball valve 16 is disposed between the air reservoir 19 and the pressure control valve 14, and is used to seal between the air reservoir 19 and the pressure control valve 14 when closed.

[0051] Understandably, in practical implementation, on the one hand, the ball valve's opening and closing element is a ball. When closed, the ball rotates 90°, and the circular through-hole on the ball fits tightly with the valve seat, forming an annular sealing surface. This surface sealing method, compared to the line sealing or point sealing of other valves, has a larger contact area and a better sealing effect. It can effectively prevent liquid water from the water reservoir 18 from passing through the first ball valve 15 or compressed gas from the gas reservoir 19 from passing through the second ball valve 16, or prevent contamination of the liquid water or compressed gas during equipment maintenance or long-term shutdown. On the other hand, the ball valve only needs to rotate 90° to complete full opening or full closing, with a short operation time (<10 seconds), making it suitable for quickly isolating the system during maintenance. Compared to gate valves (which require multiple rotations to open and close) or globe valves (which require adjusting the opening), ball valves have higher operating efficiency, and the handle operating torque is usually... Even in compact spaces, it is easy to operate manually. Furthermore, during normal operation, when the ball valve is fully open, the ball's through-hole is perfectly aligned with the pipe's inner diameter (e.g., the through-hole diameter of a DN25 ball valve is 25mm), forming a 1:1 equal-diameter flow channel. The fluid resistance coefficient (ζ) is only 0.05-0.1, far lower than that of a stop valve (ζ=5-10) or gate valve (ζ=0.5-1). This ensures that sufficient compressed gas and liquid water are transmitted with extremely low resistance during the humidification process of the airflow entering oven 1, maintaining droplet uniformity and evaporation efficiency, and meeting the precise temperature and humidity control requirements within oven 1.

[0052] In a more specific embodiment, the liquid water supplied by the water supply device is deionized water. It is understood that, in practice, ordinary water contains various impurity ions, such as... , , , If these ions are directly used for humidification of the negative electrode coating, they may migrate or deposit during battery charging and discharging. Deionized water can avoid introducing ions that react with the electrolyte (such as lithium hexafluorophosphate solution).

[0053] In a more specific embodiment, the water supply device includes a water storage tank 18, a first ball valve 15, and a flow control valve 13 connected in sequence, with the flow control valve 13 connected to an air nozzle; the gas compressor includes an air storage tank 19, a second ball valve 16, a pressure control valve 14, and a switching valve 17 connected in sequence, with the switching valve 17 connected to an air nozzle.

[0054] In a more specific embodiment, both the flow control valve 13 and the switching valve 17 are solenoid valves.

[0055] In a more specific embodiment, the humidity detector 11 is connected to the flow control valve 13, the on / off valve 17, and the pressure control valve 14 via the controller 20. The humidity detector 11 transmits the humidity value to the controller 20, which adjusts the automatic opening and closing of the flow control valve 13 and the on / off valve 17 based on the humidity value, and adjusts the opening degree of the flow control valve 13 to achieve automatic flow adjustment, and adjusts the pressure of the pressure controller 20 to achieve automatic gas pressure adjustment.

[0056] In a more specific embodiment, the temperature detector 12 is connected to the heater 4 via the controller 20. The temperature detector 12 transmits the temperature value to the controller 20, and the controller 20 adjusts the heating temperature of the heater 4 according to the temperature value to achieve precise control of the temperature and humidity inside the oven 1.

[0057] In a more specific embodiment, controller 20 is PLC controller 20.

[0058] In a more specific embodiment, the air inlet device 2 is provided with a fan 21, a heater 4, a filter 6 and a humidifier 5 arranged in sequence according to the gas flow direction. The fan 21 is used to introduce the gas in the return air device 7 and the fresh air device 22 into the air inlet device 2, so that the airflow passes through the heater 4, the filter 6 and the humidifier 5 in sequence, and finally enters the oven 1 through the air inlet 3.

[0059] It should be noted that the terms used to describe positional relationships in the above examples and accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. The various embodiments of this utility model described above are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A temperature and humidity control system for an oven, characterized in that, include: Oven, temperature and humidity control module, and ventilation module; The ventilation module includes an air inlet device, which is connected to the air inlet of the oven; The temperature and humidity control module includes a heater and a humidifier. The heater and the humidifier are respectively installed in the air inlet device. The humidifier is located near the air inlet of the oven, and the heater is located on the side of the humidifier away from the air inlet of the oven. The humidifier and the heater are used to heat the airflow generated in the air inlet device before it enters the oven and then humidify it.

2. The oven temperature and humidity control system according to claim 1, characterized in that, The air inlet device is also equipped with a filter, which is located on the side of the humidifier away from the air inlet of the oven. The filter is used to filter the airflow before humidification to prevent the moisture from the humidifier from wetting the filter element and causing it to stick together.

3. The oven temperature and humidity control system according to claim 2, characterized in that, The ventilation module also includes a return air device, which is connected to the first air outlet of the oven and the air inlet device. The return air device is used to collect the airflow that has passed through the drying process in the oven and discharges from the first air outlet, and inputs the discharged airflow into the air inlet device to realize airflow recycling.

4. The oven temperature and humidity control system according to claim 3, characterized in that, The filter is disposed between the humidifier and the heater. The filter is used to filter the airflow heated by the heater to prevent the moisture carried by the airflow from wetting the filter element.

5. The oven temperature and humidity control system according to claim 3, characterized in that, The ventilation module also includes an exhaust device, which is connected to the second air outlet of the oven. The temperature and humidity control module also includes a humidity detector, which is located inside the exhaust device and near the second air outlet. The humidity detector is connected to the humidifier and is used to detect the humidity value of the airflow that passes through the drying process inside the oven and is output from the second air outlet of the oven. The humidity value is then sent to the humidifier so that the humidifier adjusts the amount of liquid water applied according to the humidity value.

6. The oven temperature and humidity control system according to claim 1, characterized in that, The temperature and humidity control module also includes a temperature detector, which is located near the air inlet and connected to the heater. The temperature detector is used to detect the temperature value of the airflow after it has been humidified by the humidifier and send it to the heater so that the heater can adjust the heating temperature according to the temperature value.

7. The oven temperature and humidity control system according to claim 5, characterized in that, The humidifier includes a water supply unit, a gas compressor, and a nozzle. The water outlet of the water supply unit and the air outlet of the gas compressor are connected to the nozzle. The gas compressor is used to provide air compression kinetic energy to disperse the liquid water in the water supply unit into droplets, which are then sprayed onto the heated airflow through the nozzle.

8. The oven temperature and humidity control system according to claim 7, characterized in that, The water supply device includes a flow control valve, the gas compressor includes a pressure control valve, and the humidity detector is connected to the flow control valve of the water supply device and the pressure control valve of the gas compressor respectively. The pressure control valve is used to adjust the flow rate of the compressed gas and thus adjust the size of the droplets, and the flow control valve is used to adjust the water supply.

9. The oven temperature and humidity control system according to claim 8, characterized in that, The water supply device also includes a water storage tank and a first ball valve. The gas compressor includes an air storage tank and a second ball valve. The first ball valve is disposed between the water storage tank and the flow control valve. When the first ball valve is closed, it is used to seal between the water storage tank and the flow control valve. The second ball valve is disposed between the air storage tank and the pressure control valve. When the second ball valve is closed, it is used to seal between the air storage tank and the pressure control valve.

10. The oven temperature and humidity control system according to claim 7, characterized in that, The water supply device provides deionized water.

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