Air floating type drying oven and working method thereof

Abstract

The invention relates to an air floating type drying oven and a working method thereof, and belongs to the technical field of coating drying. The drying oven mechanism comprises a pair of drying oven assemblies which are used for containing and drying a base material and arranged up and down, the air blowing directions of the drying oven assemblies are opposite in the vertical direction, and an air floating area is formed between the upper and lower drying oven assemblies. The air supply mechanism is communicated with one side of the drying oven mechanism and is used for conveying gas for forming an air flotation area and drying the base material into the drying oven mechanism; the air return mechanism communicates with the other side of the drying oven mechanism and is used for discharging part or all of gas in the drying oven mechanism so as to assist in controlling the temperature and humidity in the drying oven mechanism; the adjusting mechanism is connected in front of the air inlet side of the air supply mechanism and used for adjusting the temperature and humidity of the air entering the drying oven mechanism from the air supply mechanism; and the base material is in a suspended state in the air floatation area under the action of up-down staggered air blowing. The base material can be uniformly suspended and dried, the humidity and temperature in the drying oven can be adjusted and controlled, and the humidifying effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of coating and drying, in particular to an air-floating oven and a working method thereof. Background Art

[0002] In the field of coating and drying of substrates (such as coated films and coated papers), changes in ambient humidity will directly affect the quality of the product. The humidification function of the drying oven can effectively adjust the internal humidity and ensure uniform humidity, thereby avoiding uneven drying of the product and improving the yield and quality of the product.

[0003] In the related art, the humidification system adopts an ordinary interval distribution channel, the nozzle is on the inner side of the channel, and an additional conveying or traction mechanism is required, which usually results in the phenomenon that water cannot be added, the steam temperature is high, the contact time is short, and the humidification effect is poor; in addition, this structure usually produces condensation water, and after long-term operation, water droplets fall on the surface of the product, affecting the processing quality of the product. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an air flotation oven and a working method thereof, so that the substrate is suspended and dried evenly, and the problems of substrate scratches, wrinkles and warping are avoided; and the humidity and temperature inside the oven can be adjusted and controlled, and the humidification effect is good.

[0005] The technical solution adopted by the present invention is as follows: an air flotation oven, comprising:

[0006] The oven mechanism comprises a pair of oven assemblies arranged up and down for accommodating and drying the substrate, the blowing directions of the oven assemblies are opposite in the vertical direction, and an air flotation area is formed between the upper and lower oven assemblies;

[0007] An air supply mechanism is connected to one side of the oven mechanism and supplies gas for forming an air flotation area and drying the substrate into the oven mechanism;

[0008] an air return mechanism, connected to the other side of the oven mechanism, for partially or completely discharging the gas in the oven mechanism to assist in controlling the temperature and humidity in the oven mechanism;

[0009] A regulating mechanism, connected before the air inlet side of the air supply mechanism, for regulating the temperature and humidity of the gas entering the oven mechanism from the air supply mechanism;

[0010] The substrate is in a suspended state in the air flotation area due to the staggered upward and downward blowing action of the oven assembly.

[0011] In one embodiment, the oven mechanism includes an upper oven assembly and a lower oven assembly, the upper oven assembly includes an upper oven body and a plurality of upper blowing units arranged at the bottom of the upper oven body and openings facing downward, the lower oven assembly includes a lower oven body and a plurality of lower blowing units arranged at the top of the lower oven body and openings facing upward, and the upper blowing units and the lower blowing units are arranged alternately.

[0012] In one of the embodiments, a control mechanism is further included, and the control mechanism is electrically connected to the regulating mechanism, the air supply mechanism and the air return mechanism for controlling the working state.

[0013] In one embodiment, the air supply mechanism includes an air supply fan, which is connected to the oven mechanism through an air supply pipeline. The air supply pipeline includes two branch pipelines, one of which is connected to the upper oven assembly, and the other is connected to the lower oven assembly, so as to simultaneously transport gas to the upper oven assembly and the lower oven assembly; each branch pipeline in the air supply pipeline is provided with an air supply valve, which is used to control the air supply volume or air supply time of the corresponding branch pipeline.

[0014] In one embodiment, the regulating mechanism includes a fresh air filter and a primary filter for filtering fresh air, a heating component for heating the air, and a humidifying component for humidifying the air; the fresh air passes through the fresh air filter and the primary filter in sequence, enters the heating component for heating, and is mixed with the water vapor added by the humidifying component before being sent to the air supply mechanism.

[0015] In one embodiment, the heating component is a heating element in the form of an electric heating coil, and the humidification component includes a humidification port and an atomizing nozzle. After water vapor is added from the humidification port, it is discharged through the atomizing nozzle and mixed with the air heated by the heating component.

[0016] In one of the embodiments, the return air mechanism includes two return air ducts, one of which is connected to the upper oven assembly, and the other is connected to the lower oven assembly; the return air duct is used to discharge part or all of the gas in the oven mechanism, with a part of the discharged gas entering the exhaust port and the other part being re-introduced into the regulating mechanism for circulation; a return air valve is provided on each of the return air ducts, and the return air valve is used to control the return air volume or return air time of the corresponding return air duct.

[0017] In one of the embodiments, the lower oven assembly further comprises at least one supporting guide roller, and the supporting guide roller is used to guide and support the substrate when the blowing is not started or the blowing is stopped.

[0018] A working method for the above-mentioned air flotation oven comprises the following steps:

[0019] Deliver gas to the oven mechanism through the air supply mechanism;

[0020] The temperature and humidity of the gas entering the oven mechanism are adjusted by the regulating mechanism;

[0021] The staggered upper and lower blowing action of the upper and lower blowing units is used to form an air flotation area in the oven mechanism, and the substrate is suspended in the air flotation area;

[0022] Exhausts hot air and moisture through the return air mechanism, helping to control the temperature and humidity levels within the oven mechanism.

[0023] In one of the embodiments, the operating states of the air supply mechanism, the regulating mechanism and / or the air return mechanism are also controlled by the control mechanism to achieve precise control of the drying process.

[0024] In one embodiment, the opening degree of the air supply valve and / or the air return valve is adjusted by a control mechanism to control the air supply volume and / or the air return volume, thereby further adjusting the temperature and humidity in the oven mechanism and the drying effect of the substrate.

[0025] The beneficial effects of the present invention are as follows:

[0026] The present invention has a compact and reasonable structure. The air flotation area formed by the upper and lower oven components utilizes the effect of staggered air blowing to make the substrate suspended in the air flotation area. This design not only avoids direct contact between the substrate and the internal structure of the oven, reduces the risk of scratches, wrinkles and warping, but also ensures that the substrate is evenly heated during the drying process, thereby improving the yield and quality of the product;

[0027] The present invention also has the following advantages:

[0028] (1) The regulating mechanism of the present invention can accurately regulate the temperature and humidity of the gas entering the oven mechanism, which is achieved through the synergistic effect of the fresh air filter, the primary filter, the heating component and the humidifying component, thereby ensuring the stability and controllability of the internal environment of the oven. Changes in the temperature and humidity of the environment will directly affect the quality of the substrate product, which is crucial in the field of coating and drying;

[0029] (2) Compared with the prior art, which has the problem of poor humidification effect and easy generation of condensed water, the present invention realizes the effective addition and mixing of water vapor through the design of the humidification port and atomizing nozzle in the humidification component. This not only improves the humidification effect, but also avoids the generation of condensed water, thereby eliminating the risk of condensed water dripping on the product surface and affecting the processing quality;

[0030] (3) The branch pipelines in the air supply mechanism and the air return mechanism of the present invention and the design of the air supply valve and the air return valve make the present invention highly flexible in gas delivery and exhaust; by adjusting the opening degree of the air supply valve and the air return valve, the air supply volume and the air return volume can be accurately controlled, thereby further adjusting the temperature and humidity in the oven mechanism and the drying effect of the substrate;

[0031] (4) The present invention also includes a control mechanism, which is electrically connected to the regulating mechanism, the air supply mechanism and the air return mechanism to control their working states. Through the intelligent control of the control mechanism, precise control of the drying process can be achieved, including the adjustment of the air supply volume, the air return volume, the temperature and the humidity. This not only improves production efficiency, but also reduces energy consumption and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0033] Figure 2 for Figure 1 Schematic diagram of the structure in the middle right view state.

[0034] Figure 3 for Figure 1 Schematic diagram of the internal structure in the center main view state.

[0035] Figure 4 for Figure 1 Schematic diagram of the structure in the middle left view state.

[0036] Figure 5 It is a schematic diagram of the working principle of the oven mechanism of the present invention.

[0037] Among them: 100, oven mechanism; 200, air supply mechanism; 300, air supply pipeline; 400, adjustment mechanism; 500, return air mechanism; 600, flexible connecting pipe; 700, control mechanism;

[0038] 110. upper oven assembly; 120. lower oven assembly;

[0039] 111. upper oven body; 112. upper air blowing unit;

[0040] 121. lower oven body; 122. lower air blowing unit; 123. supporting guide roller;

[0041] 210, air supply fan; 220, driving fan; 230, shock absorbing pad;

[0042] 310, first air supply connecting pipe; 320, first oven air supply pipe; 330, second air supply connecting pipe; 340, third air supply connecting pipe; 350, second oven air supply pipe; 360, air supply valve;

[0043] 410, fresh air inlet; 420, fresh air filter; 430, primary filter; 440, heating component; 450, humidification component;

[0044] 510, first oven return air duct; 520, first return air connecting pipe; 530, second oven return air duct; 540, second return air connecting pipe; 550, exhaust port; 560, return air valve. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0050] like Figures 1 to 5 , which is a schematic diagram of the overall structure of the air-floating oven of the present invention, an air-floating oven of the present invention comprises an oven mechanism 100, an air supply mechanism 200, an air return mechanism 500, an adjustment mechanism 400 and a control mechanism 700.

[0051] In some embodiments, oven mechanism 100 includes an upper oven assembly 110 and a lower oven assembly 120;

[0052] Furthermore, the upper oven assembly 110 includes an upper oven body 111 and a plurality of upper blowing units 112 arranged at the bottom thereof, and the lower oven assembly 120 includes a lower oven body 121 and a plurality of lower blowing units 122 arranged at the top thereof; the upper blowing units 112 and the lower blowing units 122 are arranged alternately to form an air flotation area, so that the substrate is in a suspended state during the drying process.

[0053] Furthermore, the lower oven assembly 120 further includes at least one supporting guide roller 123, and the supporting guide roller 123 is used to guide and support the substrate when the blowing is not started or the blowing is stopped.

[0054] In some embodiments, the air supply mechanism 200 includes an air supply fan 210, which is provided with a driving fan 220 to provide power. The air inlet of the air supply fan 210 is connected to the adjustment mechanism 400 through a flexible connecting pipe 600, and the air outlet is connected to the oven mechanism 100 through an air supply pipeline 300. To ensure smooth operation, a shock-absorbing pad 230 is also provided at the bottom of the air supply fan 210;

[0055] Furthermore, the air supply pipeline 300 is constructed as follows: the first air supply connection pipe 310 is connected to the air outlet of the blower 210, and its gas flow is divided into two paths on the other side. One path sends air into the upper oven body 111 through the first oven air supply pipe 320; the other path passes through the second air supply connection pipe 330 and the third air supply connection pipe 340 in sequence, and then sends air into the lower oven body 121 through the second oven air supply pipe 350. In order to accurately control the air supply, air supply valves 360 are provided on the first oven air supply pipe 320 and the second oven air supply pipe 350. By controlling the opening or closing of the air supply valve 360, the air supply time and air supply amount can be determined.

[0056] In some embodiments, the regulating mechanism 400 includes a regulating box, and a fresh air inlet 410 is provided on the top of the regulating box. A fresh air filter 420 is provided on the air inlet side of the fresh air inlet 410 as the first stage of filtration; a primary filter 430 is also provided in the regulating box as the second stage of filtration. Fresh air enters from the fresh air inlet 410, passes through the fresh air filter 420 and the primary filter 430 in sequence, and then enters the heating component 440. The air heated by the heating component 440 is mixed with the water vapor added by the humidifying component 450, and then discharged from the outlet of the regulating box, and enters the air supply mechanism 200 through the flexible connecting pipe 600;

[0057] Furthermore, the structure of the heating component 440 is in the form of an electric heating coil, which can efficiently heat the air. The structure of the humidifying component 450 includes the humidifying component 450, and the humidifying component 450 includes a humidifying port and an atomizing nozzle arranged at the bottom of the humidifying port; after the water vapor is added from the humidifying port, it is discharged through the atomizing nozzle and mixed with the air heated by the heating component 440, thereby improving the humidification effect and avoiding the generation of condensed water.

[0058] In some embodiments, the return air mechanism 500 includes a first oven return air duct 510 and a second oven return air duct 530. The first oven return air duct 510 is connected to the lower oven body 121, and the second oven return air duct 530 is connected to the upper oven body 111. The mixed gas exhausted through the first oven return air duct 510 passes through the first return air connecting pipe 520 and then merges with the mixed gas exhausted through the second oven return air duct 530. The merged mixed gas is divided into two paths: one path is discharged through the exhaust port 550; the other path re-enters the regulating box of the regulating mechanism 400 through the second return air connecting pipe 540 for circulation;

[0059] Furthermore, in order to accurately control the return air, a return air valve 560 is provided on each of the first oven return air duct 510 and the second oven return air duct 530. By controlling the opening or closing of the return air valve 560, the return air time and return air volume can be determined.

[0060] In some embodiments, the present invention further includes a control mechanism 700, which is electrically connected to the adjustment mechanism 400, the air supply mechanism 200, and the air return mechanism 500, respectively, for controlling their working states. Through the intelligent control of the control mechanism 700, precise control of the drying process can be achieved, including the adjustment of the air supply volume, the air return volume, the temperature and the humidity, etc. This not only improves production efficiency, but also reduces energy consumption and costs.

[0061] The present invention also provides a working method of an air flotation oven, comprising the following steps:

[0062] Step 1: Deliver gas to the oven mechanism 100 through the air supply mechanism 200. The air supply fan 210 is started to deliver external gas to the upper oven assembly 110 and the lower oven assembly 120 through the air supply pipeline 300;

[0063] Step 2: The temperature and humidity of the gas entering the oven mechanism 100 are adjusted by the regulating mechanism 400. The fresh air is filtered by the fresh air filter 420 and the primary filter 430 in sequence, and then enters the heating component 440 to be heated to a set temperature, and then mixed with the water vapor added by the humidifying component 450 to form gas with suitable temperature and humidity, and then sent to the oven mechanism 100;

[0064] Step 3: Using the staggered up and down blowing action of the upper blowing unit 112 and the lower blowing unit 122 to form an air flotation area in the oven mechanism 100, and suspend the substrate in the air flotation area. The upper blowing unit 112 and the lower blowing unit 122 work simultaneously, and the blown gas forms a stable air flotation area in the oven mechanism 100, suspending the substrate therein;

[0065] Step 4: Exhaust hot air and moisture through the return air mechanism 500 to help control the temperature and humidity level in the oven mechanism 100. The return air duct exhausts part or all of the gas in the oven mechanism 100, part of which is discharged through the exhaust port 550, and the other part is re-introduced into the adjustment mechanism 400 for recycling.

[0066] In some embodiments, the present invention further includes a control step, and the process of the control step is: controlling the working state of the air supply mechanism 200, the regulating mechanism 400 and / or the return air mechanism 500 through the control mechanism 700 to achieve precise control of the drying process. The control mechanism 700 can automatically adjust the opening degree of the air supply valve 360 ​​and the return air valve 560 according to the preset process parameters, thereby controlling the air supply volume and the return air volume, and further adjusting the temperature and humidity in the oven mechanism 100 and the drying effect of the substrate.

[0067] An air flotation oven and a working method thereof of the present invention enable a substrate to be suspended and dried in an air flotation area between the upper air blowing unit 112 and the lower air blowing unit 122 through the coordinated cooperation of an upper air blowing unit 112 and a lower air blowing unit 122, thereby avoiding direct contact between the substrate and the internal structure of the oven, reducing the risk of scratches, wrinkles and warping, and ensuring uniform heating of the substrate during the drying process; in addition, the adjustment mechanism 400 of the present invention can accurately adjust the temperature and humidity of the gas entering the oven, ensure the stability and controllability of the internal environment of the oven, and improve the yield and quality of the product; the design of the branch pipelines in the air supply mechanism 200 and the return air mechanism 500 and the air supply valve 360 ​​and the return air valve 560 makes the gas delivery and discharge highly flexible and can be accurately adjusted according to actual needs.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express the implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air flotation oven, characterized in that: include: The oven mechanism comprises a pair of oven assemblies arranged up and down for accommodating and drying the substrate, the blowing directions of the oven assemblies are opposite in the vertical direction, and an air flotation area is formed between the upper and lower oven assemblies; An air supply mechanism is connected to one side of the oven mechanism and supplies gas for forming an air flotation area and drying the substrate into the oven mechanism; an air return mechanism, connected to the other side of the oven mechanism, for partially or completely discharging the gas in the oven mechanism to assist in controlling the temperature and humidity in the oven mechanism; A regulating mechanism, connected before the air inlet side of the air supply mechanism, for regulating the temperature and humidity of the gas entering the oven mechanism from the air supply mechanism; The substrate is in a suspended state in the air flotation area due to the staggered upward and downward blowing action of the oven assembly.

2. The air flotation oven according to claim 1, characterized in that: The oven mechanism comprises an upper oven assembly and a lower oven assembly, wherein the upper oven assembly comprises an upper oven body and a plurality of upper blowing units arranged at the bottom of the upper oven body and openings facing downward, and the lower oven assembly comprises a lower oven body and a plurality of lower blowing units arranged at the top of the lower oven body and openings facing upward, wherein the upper blowing units and the lower blowing units are arranged alternately.

3. The air flotation oven according to claim 1, characterized in that: It also includes a control mechanism, which is electrically connected to the regulating mechanism, the air supply mechanism and the air return mechanism for controlling the working state.

4. The air flotation oven according to claim 1, characterized in that: The air supply mechanism includes an air supply fan, which is connected to the oven mechanism through an air supply pipeline, and the air supply pipeline includes two branch pipelines, one of which is connected to the upper oven assembly, and the other branch pipeline is connected to the lower oven assembly, so as to simultaneously transport gas into the upper oven assembly and the lower oven assembly; Each branch pipeline in the air supply pipeline is provided with an air supply valve, and the air supply valve is used to control the air supply volume or air supply time of the corresponding branch pipeline.

5. The air flotation oven according to claim 1, characterized in that: The regulating mechanism includes a fresh air filter and a primary filter for filtering fresh air, a heating component for heating the air, and a humidifying component for humidifying the air; The fresh air passes through the fresh air filter and the primary filter in turn, enters the heating component for heating, and after mixing with the water vapor added by the humidification component, is sent to the air supply mechanism.

6. The air flotation oven according to claim 5, characterized in that: The heating component is a heating element in the form of an electric heating coil, and the humidifying component includes a humidifying port and an atomizing nozzle. Water vapor is added from the humidifying port, discharged through the atomizing nozzle, and mixed with the air heated by the heating component.

7. The air flotation oven according to claim 1, characterized in that: The return air mechanism comprises two return air ducts, one of which is connected to the upper oven assembly, and the other is connected to the lower oven assembly; The return air duct is used to exhaust part or all of the gas in the oven mechanism. Part of the exhausted gas enters the exhaust port, and the other part is re-introduced into the regulating mechanism for circulation; Each of the return air ducts is provided with a return air valve, and the return air valve is used to control the return air volume or return air time of the corresponding return air duct.

8. The air flotation oven according to claim 2, characterized in that: The lower oven assembly further comprises at least one supporting guide roller, which is used for guiding and supporting the substrate when the blowing is not started or stopped.

9. A method for operating the air flotation oven according to any one of claims 1 to 8, characterized in that: The following steps are involved: Deliver gas to the oven mechanism through the air supply mechanism; The temperature and humidity of the gas entering the oven mechanism are adjusted by the regulating mechanism; The staggered upper and lower blowing action of the upper and lower blowing units is used to form an air flotation area in the oven mechanism, and the substrate is suspended in the air flotation area; Exhausts hot air and moisture through the return air mechanism, helping to control the temperature and humidity levels within the oven mechanism.

10. The operating method of an air flotation oven according to claim 9, characterized in that: The control mechanism also controls the states of the air supply mechanism, the regulating mechanism and the air return mechanism to achieve precise control of the drying process.

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