Hot-air replenishment and recirculating-air drying apparatus for membrane webs

Abstract

A hot-air replenishment and recirculating-air drying apparatus for membrane webs. The apparatus comprises a temperature regulation unit, a humidity regulation unit, an air velocity regulation unit, a device body (80), and a control unit. The temperature regulation unit comprises a temperature sensing component (90) and a temperature regulation component; the humidity regulation unit comprises a humidity sensing component (60) and a humidity regulation component (70); and the air velocity regulation unit comprises an air velocity sensor (50) and an air velocity regulation component. The apparatus can automatically display and regulate the temperature, humidity and air velocity in a drying oven, and can be used for constant-temperature and constant-humidity drying of membrane webs during movement.

Description

A hot air supply and circulating air drying device for rolled materials Technical Field

[0001] This technical solution mainly involves the technical fields of "industrial drying oven technology", "environmental temperature and humidity control technology", and "automated temperature and humidity control technology", and in particular, it relates to a hot air supply and circulating air drying device for roll materials. Background Technology

[0002] In the production of in vitro diagnostic test strips, the drying of the roll film is a crucial step that directly affects the product's quality and performance. Traditional roll drying equipment typically only has basic heating functions and lacks precise control over the internal environment of the drying oven. This results in unstable drying effects, high energy consumption, and ineffective moisture removal, affecting the uniformity and quality of the drying process. To ensure drying effectiveness, some rolls are often placed in large drying chambers using hot air drying. These ovens often employ simple hot air circulation systems without automatic adjustment functions, requiring operators to monitor and adjust the oven's operating status in real time, increasing labor intensity and operational difficulty.

[0003] Some drying ovens, while equipped with temperature and humidity detection functions, lack effective moisture removal mechanisms. This prevents timely removal of moisture from the oven's interior under high humidity conditions, affecting drying efficiency and product quality. Other ovens, although designed with moisture removal systems, fail to automatically adjust the removal rate based on actual humidity changes, resulting in inaccurate moisture removal, wasted energy, and potential environmental pollution.

[0004] Furthermore, most existing drying ovens are designed for fixed-position drying of specific materials, making them unsuitable for the efficient drying of materials in motion. Additionally, temperature control of materials in motion requires addressing heat loss and replenishment to achieve a relatively constant temperature within the oven.

[0005] To address the aforementioned issues, existing oven technology solutions have the following shortcomings:

[0006] 1. For drying membrane materials during operation, the internal environment of the drying oven is not precisely controlled, and automatic adjustment of temperature and humidity cannot be achieved, resulting in unstable drying effect.

[0007] 2. Existing drying ovens are mainly used for the closed drying of stationary materials, and are not suitable for the stable drying of materials in motion.

[0008] 3. The operation is complex, requiring manual monitoring and adjustment of the oven's working status, which increases labor intensity and operational difficulty.

[0009] 4. High energy consumption and lack of energy-saving measures such as energy reuse lead to increased production costs.

[0010] Utility Model Content

[0011] Based on this, this technical solution mainly solves the following problems: 1) Traditional drying ovens cannot achieve precise control of temperature, humidity and wind speed, resulting in unstable drying effect; 2) For drying materials in motion, it is necessary to solve the technical problems of heat loss and maintaining efficient drying within a specific temperature range; 3) Complex operation, requiring manual monitoring and adjustment of the oven's working status, increasing labor intensity and operational difficulty; 4) High energy consumption, lack of energy-saving measures such as hot air circulation, leading to energy waste; 5) Traditional drying ovens cannot provide uniform wind speed, affecting the basic problem of drying uniformity and efficiency.

[0012] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hot air supply and circulating air drying device for rolled materials. This device features precise internal environment control, automatic temperature and humidity adjustment, automatic moisture removal, energy saving, and adjustable air speed.

[0013] To solve the above-mentioned technical problems, the present invention achieves its objective as follows: The present invention relates to a hot air supply and circulating air drying device for rolled materials, comprising a temperature regulation unit, a humidity regulation unit, a wind speed regulation unit, a device body, and a control unit.

[0014] The oven body is divided into several zones by internal partitions: a mixing chamber for return air and fresh air from the drying zone; an airflow heating zone equipped with an internal and external pressure differential sensor, a fresh air controller, and a return air duct with an electric heating device; and a drying zone equipped with a wind speed sensor, a humidity sensor, and a temperature sensor.

[0015] The temperature control unit includes a temperature sensing component and a temperature control component. The temperature sensing component adopts one or more of the following: thermocouple, resistance temperature detector (RTD), thermistor, integrated temperature sensor, and infrared temperature sensor. For example, a thermocouple is selected, with a measurement accuracy of ±0.5℃ and a response time of less than 1 second.

[0016] Temperature control components: including an electric heating element and an electric heating PI film.

[0017] Electric heating device: Three PTC electric heaters are selected and located after the fresh air controller in front of the circulating fan. Each PTC electric heater has a power of 500W. The controller controls the temperature and energization frequency of the heaters to heat and control the airflow passing through them.

[0018] Electrothermal PI film: Positioned parallel to the direction of the film material to be dried, at a distance of 8mm, it provides stable radiant heat to the film material, with a radiant heat power of 200W / m. 2 .

[0019] The humidity control unit includes a humidity sensing component and a humidity control component:

[0020] Humidity sensing components: One or more of lithium chloride humidity sensors, carbon humidity-sensitive elements, or polymer thin-film capacitive humidity sensors are used. For example, a lithium chloride humidity sensor is selected, with a measurement accuracy of ±3%RH and a response time of less than 5 seconds.

[0021] Humidity control components: These include an exhaust element installed above the drying zone. The exhaust element is electrically controlled and automatically adjusts the size of the exhaust opening or the exhaust volume based on the difference between the airflow humidity value and the set target value.

[0022] The wind speed regulation unit includes a wind speed sensor and wind speed regulation components:

[0023] Wind speed sensing component: A thermal wind speed sensing component is selected, with a measurement accuracy of ±0.1m / s and a response time of less than 2 seconds;

[0024] The airflow regulation component includes a fresh air controller and a circulating fan. The fresh air controller is installed at the fresh air inlet and is a combination of a fan and a valve. The fan speed range is 0-3000 rpm, and the valve opening range is 0-100%. It can adjust the fresh air intake based on data from wind speed, temperature, and humidity sensors.

[0025] Circulating fan: A centrifugal fan is selected and installed inside the circulating air duct, located after the electric heating unit. The fan's airflow range is 1000-5000 m³ / h. 3 / h, with a wind speed range of 5-20m / s, can mix fresh air and return air according to the wind speed sensor value, and then pass through the heating zone at a certain wind speed. The circulating air volume can be changed according to the adjustment target.

[0026] Control unit: Connected to the temperature control unit, humidity control unit, and fan speed control unit, including control components and display components.

[0027] Control components: A PLC controller is used to achieve precise control and adjustment of each unit;

[0028] Display component: It is a 10-inch LCD screen with a resolution of 1920×1080, which can display parameters such as temperature, humidity, and wind speed in real time.

[0029] In some embodiments, the oven further includes:

[0030] The upper and lower rotating shafts are located in the film drying area and can be used to wind the roll material up and down to improve drying efficiency. The last rotating shaft before the roll material is output from the oven is also equipped with a torque motor to drive it, which can transmit and eliminate the friction force generated on the roll material in the drying area, and pull the roll material through the oven under low tension.

[0031] The beneficial effects of this utility model are as follows: 1. Improved drying efficiency: The hot air supply and circulating air drying device of this utility model can quickly and evenly heat the film material through a hot air circulation system, thus improving drying efficiency. 2. Precise temperature, humidity, and wind speed control: Through built-in temperature, humidity, and wind speed sensors, this utility model can monitor the temperature, humidity, and wind speed inside the oven in real time, and automatically adjust the electric heating device, fresh air controller, circulating fan, and exhaust device according to the monitoring results to ensure a stable internal environment and improve drying quality. 3. Energy saving and consumption reduction: The oven of this utility model reduces energy consumption by adjusting the ratio of circulating air volume to fresh air volume through a circulating fan, and further reduces energy consumption by providing radiant heat through the PI film. 4. Automated operation: The oven of this utility model has automated hot air circulation and moisture warning and exhaust functions, reducing manual operation and improving production efficiency and safety. 5. Strong adaptability: The oven design of this utility model can adapt to the drying needs of materials in motion, avoiding problems such as large temperature fluctuations and poor drying effect, and has strong adaptability and flexibility. 6. Improved Product Quality: By precisely controlling the temperature, humidity, and airflow during the drying process, this invention effectively avoids damage to the film material caused by excessively high temperature, unsuitable humidity, or uneven drying, thus improving product quality. 7. By using a torque motor to transmit and eliminate the frictional force generated on the roll material on the roller in the drying zone, this invention reduces the tension of the roll material during the drying process, improving the stability and service life of the equipment. Attached Figure Description

[0032] 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 the structures shown in these drawings without creative effort.

[0033] Figure 1 is a schematic diagram of the structure of a hot air supply and circulating air drying device for roll material according to the present invention.

[0034] Figure 2 is a left view of a hot air supply and circulating air drying device for roll materials according to this utility model;

[0035] Figure 3 is a front view of a hot air supply and circulating air drying device for roll materials according to this utility model; Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] In addition, the term "and / or" in the text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] Example 1

[0040] As shown in Figures 1-3, this application provides a technical solution: a hot air supply and circulating air drying device for rolled materials, comprising a temperature control unit, a humidity control unit, a wind speed control unit, a material conveying unit, a device body 80, and a control unit.

[0041] The equipment body 80 is divided into multiple areas by partitions 81. The area includes the mixing chamber of return air and fresh air in the film drying area 813, the airflow heating area 811 with a fresh air controller and an electric heating device, and the drying area 813 with a wind speed sensor 50, a humidity sensor 60, and a temperature sensor 90.

[0042] The temperature control unit includes a temperature sensing component 90 and a temperature control component, which can realize real-time temperature display and adjustment;

[0043] The temperature sensing component 90 is one or more of the following: thermocouple, resistance temperature detector (RTD), thermistor, integrated temperature sensor, and infrared temperature sensor.

[0044] The temperature regulating component includes an electric heating device 20 and an electric heating PI film 83;

[0045] Specifically, the electric heating device 20 is a PTC electric heater. It is located after the fresh air controller in front of the circulating fan, with at least one device installed. The controller controls the temperature and frequency of operation of the electric heating device to heat and control the airflow passing through it. The electric heating device 20 is located on the partition 81 within the airflow heating zone 811. It can adjust its power according to the airflow temperature to maintain the airflow temperature at the target temperature. For example, when the internal pressure difference is 8 Pa, the circulating fan speed increases to 1500 rpm, and the circulating airflow increases to 800 m³ / min. 3 / h; the electric heating device 20 is horizontally multi-layered, which can ensure the stability of the air inlet temperature; the electric heating device 20 is set vertically to the air outlet of the fresh air controller 10, and the fresh air can be heated and mixed by impacting the electric heating device 20; if the temperature value decreases, the power of the electric heater is increased, otherwise the power of the electric heater is decreased.

[0046] Specifically, the electric heating PI film 83 is set parallel to the running direction of the film material to be dried, and the electric heating PI film 83 is 5-10mm away from the film material to be dried, so as to provide stable radiant heat to the film material to be dried.

[0047] The humidity control unit includes a humidity sensing component 60 and a humidity control component 70, which can realize real-time display and adjustment of humidity;

[0048] The humidity sensing component 60 is one or more of a lithium chloride humidity sensor, a carbon humidity-sensitive element, or a polymer thin-film capacitive humidity sensor.

[0049] The humidity control unit 70 includes an exhaust element installed on the upper part of the drying zone 813. The exhaust element can adjust the air volume of the exhaust element according to the difference between the airflow humidity value and the set target value. The exhaust element includes an electric control device or a manual control device, which can control the amount of air exhausted from the drying zone.

[0050] Specifically, the electric control device is located at the top of the oven and can automatically adjust the size of the exhaust opening or the exhaust volume according to the data output by the humidity sensor to control the exhaust volume.

[0051] Specifically, the manual control device is located at the top of the oven, which can manually control the air volume. Then, based on the data output by the humidity sensor, it automatically adjusts the fresh air intake and the circulating air volume of the circulating fan. As the humidity value increases, the exhaust volume increases, thus achieving humidity control.

[0052] The fresh air conditioning unit includes a wind speed sensor 50 and a wind speed adjustment component, which can realize real-time display and adjustment of wind speed;

[0053] The wind speed sensing component 50 is one or more of the following: mechanical wind speed sensing component, thermal wind speed sensing component, and ultrasonic wind speed sensing component.

[0054] The airflow regulation component includes a fresh air controller 10 and a circulating fan 30, which can regulate the airflow in the drying device.

[0055] Specifically, the fresh air controller 10 is installed at the fresh air inlet and can adjust the fresh air intake based on the data from the wind speed sensor 50, temperature sensor 90 and humidity sensor 60.

[0056] Specifically, the fresh air controller 10 is one or both of a fan or a valve, which can control the air volume;

[0057] Specifically, the circulating fan 30 is installed in the circulating air duct, located after the electric heating device 20. It can mix fresh air and return air according to the wind speed sensor value and then pass through the heating zone at a certain wind speed. The circulating air volume is changed according to the adjustment target.

[0058] Specifically, the circulating fan 30 is a centrifugal fan or a ducted fan, which can stably deliver the heated air into the drying area.

[0059] The material conveying unit includes upper and lower rotating shafts located in the film drying area. These shafts allow for the vertical winding of the roll material, improving drying efficiency. The final rotating shaft before the roll material exits the drying oven is driven by a torque motor, which transmits and eliminates the friction generated on the roll material in the drying area, pulling the roll material through the drying oven under low tension.

[0060] The control unit is connected to the temperature regulation unit, humidity regulation unit, wind speed regulation unit, and material conveying unit. It includes control components and display components, and can realize the display and control of each unit.

[0061] The hot air supply and circulation drying device for roll film in this embodiment, through the reasonable setting of each air zone, can achieve adjustable fresh air and circulating air, hot air circulation, efficient removal of moisture, and stable and controllable wind speed. It can achieve stable hot air circulation while ensuring reduced heat loss, thereby improving the drying efficiency of roll film, increasing drying effect, and reducing drying time.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A hot air supply and circulating air drying device for rolled materials, characterized in that, Includes a temperature control unit, a humidity control unit, a fan speed control unit, the equipment body, and a control unit: The temperature regulation unit includes a temperature sensing component and a temperature regulation component, which can realize real-time temperature display and regulation; The humidity control unit includes a humidity sensing component and a humidity control component, which can realize real-time display and adjustment of humidity; The fresh air conditioning unit includes a wind speed sensor and a wind speed adjustment component, which can realize real-time display and adjustment of wind speed; The control unit is connected to the temperature regulation unit, humidity regulation unit, and wind speed regulation unit, and includes control components and display components, enabling the display and control of each unit.

2. The hot air supply and circulating air drying device for rolled materials as described in claim 1, characterized in that, The temperature regulating component includes an electric heating device and an electric heating PI film; The temperature sensing component is one or more of the following: thermocouple, resistance temperature detector (RTD), thermistor, integrated temperature sensor, and infrared temperature sensor. The oven body is divided into multiple areas by partitions: a mixing chamber for return air and fresh air from the film drying area; an airflow heating area equipped with a fresh air controller and an electric heating device; and a drying area equipped with a wind speed sensor, a humidity sensor, and a temperature sensor. The electric heating device is a PTC electric heater. The electric heating device is located after the fresh air controller in front of the circulating fan. At least one electric heating device is installed. The controller achieves heating and temperature control of the airflow passing through the electric heating device by controlling its temperature value and the frequency of power-on. The electrothermal PI film is arranged parallel to the running direction of the film material to be dried, and the electrothermal PI film is 5-10mm away from the film material to be dried, so as to provide stable radiant heat to the film material to be dried.

3. The hot air supply and circulating air drying device for rolled materials as described in claim 1, characterized in that, The humidity sensing component is one or more of a lithium chloride humidity sensor, a carbon humidity-sensitive element, or a polymer thin-film capacitive humidity sensor. The humidity regulating component includes an exhaust element installed on the upper part of the drying zone. The exhaust element can adjust the air volume of the exhaust device according to the difference between the airflow humidity value and the set target value.

4. The hot air supply and circulating air drying device for rolled materials as described in claim 1, characterized in that, The wind speed sensing component is one or more of the following: mechanical wind speed sensing component, thermal wind speed sensing component, and ultrasonic wind speed sensing component. The airflow regulating component includes a fresh air controller and a circulating fan, which can regulate the airflow within the drying device.

5. The hot air supply and circulating air drying device for rolled materials as described in claim 4, characterized in that, The wind speed regulating component also includes a bottom air outlet and an air outlet on the surface of the hollow roller, and hot air can be dispersed and sent into the dryer through the air circulation supply component. The hollow roll is directly connected to the heated mixed air, which enables the hot air to be directly and dispersed into the drying area, avoiding the blockage of the bottom hot air transmission due to the width of the membrane material.

6. The hot air supply and circulating air drying device for rolled materials as described in claim 4, characterized in that, The fresh air controller is installed at the fresh air inlet and can adjust the fresh air intake based on data from the wind speed sensor, temperature sensor and humidity sensor. The circulating fan is installed in the circulating air duct, located after the electric heating device. It can mix fresh air and return air according to the wind speed sensor value and then pass through the heating zone at a certain wind speed. The circulating air volume is changed according to the adjustment target.

7. The hot air supply and circulating air drying device for rolled materials as described in claim 6, characterized in that, The fresh air controller is one or both of a fan or a valve, which can control the air volume; The circulating fan is a centrifugal fan or a ducted fan, which can stably deliver the heated air into the drying area.

8. The hot air supply and circulating air drying device for rolled materials as described in claim 3, characterized in that, The exhaust element includes an electric or manual control device, which can control the amount of air exhausted from the drying zone. The electric control device is located at the top of the oven and can automatically adjust the size of the exhaust opening or the exhaust volume according to the data output by the humidity sensor to control the exhaust volume. The manual control device is located at the top of the oven and can manually control the air volume. Then, based on the data output by the humidity sensor, it automatically adjusts the fresh air intake and the circulating air volume of the circulating fan. As the humidity value increases, the exhaust volume increases, thus achieving humidity control.

9. The hot air supply and circulating air drying device for roll materials as described in claim 3, further comprising: The material conveying unit includes upper and lower rotating shafts located in the film drying area. These shafts can convey the roll material up and down, improving drying efficiency. The last rotating shaft before the roll material exits the oven is also equipped with a torque motor to drive it. This motor can transmit and eliminate the frictional force generated on the roll material in the drying area, pulling the roll material through the oven under low tension.

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