A new environment-friendly plywood drying device

Abstract

The utility model relates to the technical field of wood processing mechanical equipment discloses a novel environmental protection plywood drying device, including drying box, drying box inside is equipped with the conveying mechanism for conveying plywood, the top of drying box is equipped with solar energy heat collector and air energy heat pump host, solar energy heat collector is connected with the first heat exchanger in drying box through first circulation pipeline, air energy heat pump host is connected with the second heat exchanger in drying box through second circulation pipeline, the drying box is equipped with humidity sensor and temperature sensor still, the top of drying box is equipped with the moisture exhaust fan, the moisture exhaust fan is connected with intelligent control system. This novel environmental protection plywood drying device, through the complementary design of solar energy and air energy heat pump, sunny day preferentially uses free solar energy, rainy day or night automatically switches to air energy heat pump, guarantees the continuity and stability of drying process.

Description

Technical Field

[0001] This utility model relates to the technical field of wood processing machinery and equipment, and in particular to a new type of environmentally friendly plywood drying device. Background Technology

[0002] In the production of plywood, veneer drying is a crucial step, and its energy consumption accounts for a large proportion of the entire production process.

[0003] A search revealed an existing patent (publication number: CN216522749U) that discloses a novel environmentally friendly plywood drying device, comprising a drying chamber with a double-leaf door at the front end. One end of the double-leaf door is hinged to the double-leaf door, and a handle is installed on the double-leaf door. A shelf is located at the bottom of the interior of the drying chamber. An air distribution pipe is installed on one side wall of the drying chamber, and multiple air outlet nozzles are installed at equal intervals on the air distribution pipe. A suction fan and a heating chamber are installed on the top of the drying chamber. A filter sleeve is connected to the air inlet of the suction fan, and the air outlet of the suction fan is connected to the heating chamber. Heat-containing air is delivered to the heating chamber through an exhaust fan and a first transmission pipe, thereby further drying the plywood through the air inlet pipe, air distribution pipe, and air outlet nozzles, increasing the internal hot air flow rate and improving drying efficiency.

[0004] Existing technologies also include some drying equipment that uses new energy sources such as solar energy or air energy. However, these often suffer from drawbacks such as relying on a single energy source, being greatly affected by weather, having poor system stability, and low drying efficiency. Relying solely on solar energy, they cannot work effectively at night or on cloudy or rainy days; while using air source heat pumps alone will result in reduced efficiency in extreme low-temperature environments. Utility Model Content

[0005] In view of the aforementioned problem of unstable drying effect in existing methods, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a new type of environmentally friendly plywood drying device, which aims to ensure the continuity and stability of the drying process by using a complementary design of solar energy and air source heat pump, prioritizing the use of free solar energy on sunny days, and automatically switching to air source heat pump on cloudy or rainy days or at night.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel environmentally friendly plywood drying device, including a drying chamber, wherein the drying chamber is provided with a conveying mechanism for conveying plywood, and the top of the drying chamber is provided with a solar collector and an air source heat pump host. The solar collector is connected to a first heat exchanger located inside the drying chamber through a first circulation pipe, and the air source heat pump host is connected to a second heat exchanger located inside the drying chamber through a second circulation pipe. The drying chamber is also equipped with a humidity sensor and a temperature sensor. The top of the drying chamber is equipped with an exhaust fan, which is connected to an intelligent control system. The intelligent control system is electrically connected to the humidity sensor, the temperature sensor, the air source heat pump host, and the exhaust fan.

[0008] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the conveying mechanism is a multi-layer mesh belt conveyor, the conveying speed of which is driven by a variable frequency motor, and the variable frequency motor is electrically connected to the intelligent control system.

[0009] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the inner wall of the drying chamber is provided with a heat insulation layer.

[0010] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the first circulation pipeline is provided with a circulating water pump and a first control valve, the second circulation pipeline is provided with a second control valve, and the circulating water pump, the first control valve and the second control valve are all electrically connected to the intelligent control system.

[0011] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the drying chamber is equipped with a guide plate and a circulating fan to distribute hot air evenly.

[0012] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the guide plate is arranged in a figure-eight shape towards the inside of the drying chamber, and the inclination angle of the guide plate is 25°~45°.

[0013] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the outlet end of the dehumidification fan is connected to a waste heat recovery device, and the waste heat recovery device exchanges heat with the fresh air duct entering the drying chamber.

[0014] As a preferred embodiment of the novel environmentally friendly plywood drying device of this utility model, the air source heat pump host is a normal temperature air source heat pump.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model makes full use of two clean and renewable energy sources, solar energy and air energy, which significantly reduces the consumption of traditional energy and basically achieves zero emissions, meeting the requirements of green manufacturing.

[0016] 2. This utility model, through the complementary design of solar energy and air source heat pump, prioritizes the use of free solar energy on sunny days, and automatically switches to air source heat pump on cloudy or rainy days or at night, ensuring the continuity and stability of the drying process and is not affected by the weather.

[0017] 3. This utility model achieves precise automatic control of drying temperature, humidity, and sheet conveying speed through humidity and temperature sensors and an intelligent control system, thereby improving drying quality and avoiding energy waste.

[0018] 4. This utility model has a built-in baffle and a circulating fan, which allows hot air to circulate and ensures a uniform temperature field inside the chamber, resulting in good consistency in the drying of the plywood.

[0019] 5. This utility model adds a waste heat recovery device, further tapping the energy-saving potential and reducing the overall operating cost of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the novel environmentally friendly plywood drying device of this utility model; Figure 2 This is a schematic diagram of the circulation pipeline and heat exchanger structure of the novel environmentally friendly plywood drying device of this utility model; Figure 3 This is a schematic diagram of the dehumidification fan and circulating fan of the novel environmentally friendly plywood drying device of this utility model; Figure 4 This is a schematic diagram of the overall external structure of the novel environmentally friendly plywood drying device of this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Drying chamber; 2. Conveying mechanism; 3. Solar collector; 4. Air source heat pump main unit; 5. First circulation pipeline; 6. First heat exchanger; 7. Second circulation pipeline; 8. Second heat exchanger; 9. Humidity sensor; 10. Temperature sensor; 11. Exhaust fan; 12. Intelligent control system; 13. Insulation layer; 14. Circulating water pump; 15. First control valve; 16. Second control valve; 17. Baffle plate; 18. Circulating fan; 19. Waste heat recovery unit; 20. Fresh air duct. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0023] Reference Figures 1-2 This is the first embodiment of the present invention, which provides a novel environmentally friendly plywood drying device.

[0024] The system includes a drying chamber 1, inside which is a conveying mechanism 2 for transporting plywood. This provides a closed and controllable drying environment, effectively preventing heat loss and external interference, significantly improving production efficiency, and avoiding the inefficiency problems caused by traditional intermittent operation. The top of the drying chamber 1 is equipped with a solar collector 3 and an air source heat pump unit 4, which greatly reduces the dependence of the drying process on traditional fossil energy. The solar collector provides free heat energy when there is sufficient sunshine, while the air source heat pump provides stable supplementation on cloudy or rainy days or at night, ensuring the continuity and stability of the heat source. The solar collector 3 is connected to the first heat exchanger 6 located inside the drying chamber 1 through the first circulation pipe 5, and the air source heat pump unit 4 is connected to the second heat exchanger 8 located inside the drying chamber 1 through the second circulation pipe 7. This enables independent operation and flexible switching of the two heat sources. Depending on weather conditions, energy costs, or drying process requirements, the system can intelligently select to use solar energy, air energy, or both in combination, achieving efficient cascade utilization of energy and improving the adaptability and energy efficiency of the entire system. The drying chamber 1 is also equipped with a humidity sensor 9 and a temperature sensor 10, which can monitor key process parameters inside the drying chamber in real time and accurately, providing a data basis for subsequent automated control and ensuring drying quality. The top of the drying chamber 1 is equipped with an exhaust fan 11, which is connected to an intelligent control system 12. The intelligent control system 12 is electrically connected to the humidity sensor 9, the temperature sensor 10, the air source heat pump host 4, and the exhaust fan 11, realizing fully automated intelligent control of the drying process. It can accurately control the temperature and humidity of the drying curve, avoid over-drying or under-drying, and further optimize energy consumption while ensuring the quality of plywood.

[0025] The conveying mechanism 2 is a multi-layer mesh belt conveyor, whose conveying speed is driven by a variable frequency motor. The variable frequency motor is electrically connected to the intelligent control system 12, which greatly improves the space utilization and the output of a single drying cycle. It can steplessly adjust the residence time of the plywood in the box according to the drying process requirements, realizing the linkage between drying time and drying temperature, making the control more precise and flexible.

[0026] The inner wall of the drying chamber 1 is equipped with an insulation layer 13, which reduces heat loss from the drying chamber, effectively improves the utilization efficiency of low-grade heat energy such as solar energy and air energy, maintains stable temperature inside the chamber, and reduces the energy consumption of the main unit. It is one of the key basic measures for the whole set of equipment to achieve the energy-saving goal.

[0027] The first circulation pipeline 5 is equipped with a circulating water pump 14 and a first control valve 15, which realizes precise start-up and shutdown and flow control of the solar heat source circulation. It can determine when to start the solar circulation and at what flow rate, thereby avoiding ineffective energy circulation and waste, and improving the accuracy and economy of system operation. The second circulation pipeline 7 is equipped with a second control valve 16. The circulating water pump 14, the first control valve 15 and the second control valve 16 are all electrically connected to the intelligent control system 12. Example 2

[0028] Reference Figures 1-4 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the drying chamber 1 is equipped with a guide plate 17 and a circulating fan 18 to distribute hot air evenly. This forces the air to flow inside the chamber, breaks up temperature stratification, and allows hot air to flow evenly through each layer of plywood. This solves the problems of uneven temperature, local over-drying or over-humidification that are prone to occur in large drying chambers, thereby ensuring the consistency and stability of the drying quality of the entire batch of plywood.

[0029] The guide vane 17 is arranged in a figure-eight shape towards the interior of the drying chamber 1. The tilt angle of the guide vane 17 is 25°~45°, which can more scientifically and effectively guide the airflow direction, forming a uniform flow field with a wide coverage, few eddies, and low resistance, thereby optimizing the airflow organization and achieving the best hot air distribution effect with minimal energy consumption.

[0030] The outlet end of the exhaust fan 11 is connected to a waste heat recovery unit 19. The waste heat recovery unit 19 exchanges heat with the fresh air duct 20 entering the drying chamber 1, recovers the waste heat in the exhaust high temperature and high humidity exhaust gas, and uses this heat to preheat the fresh air entering the drying chamber. This greatly reduces the energy required to heat the fresh air to the working temperature, further improves the energy utilization efficiency of the entire system, and has a significant energy-saving effect.

[0031] Air source heat pump unit 4 is a normal temperature air source heat pump.

[0032] Based on embodiments 1-2, the working principle of this utility model is as follows: During operation, the intelligent control system 12 prioritizes the solar energy mode: it opens the first control valve 15 and starts the circulating water pump 14, releasing the heat collected by the solar collector 3 into the drying chamber 1 through the first heat exchanger 6. Simultaneously, the circulating fan 18 operates, ensuring uniform circulation of hot air within the chamber. Humidity sensor 9 and temperature sensor 10 inside the chamber monitor environmental parameters in real time and transmit them to the intelligent control system 12. When insufficient solar energy causes the temperature to fall below the set value, the system automatically closes the first control valve 15, opens the second control valve 16, and starts the air source heat pump unit 4 to supplement heat through the second heat exchanger 8. When the humidity is higher than the set value, the system starts the dehumidification fan 11 to dehumidify. The exhaust gas is preheated by the waste heat recovery unit 19 before being discharged. The preheated fresh air enters the chamber through the fresh air duct 20. The operating speed of the conveyor 2 is adjusted by the intelligent control system 12 according to the preset drying curve to ensure that the plywood achieves the best drying effect.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel environmentally friendly plywood drying device, comprising a drying chamber (1), characterized in that: The drying chamber (1) is equipped with a conveying mechanism (2) for conveying plywood. The top of the drying chamber (1) is equipped with a solar collector (3) and an air source heat pump host (4). The solar collector (3) is connected to a first heat exchanger (6) located inside the drying chamber (1) through a first circulation pipe (5). The air source heat pump host (4) is connected to a second heat exchanger (8) located inside the drying chamber (1) through a second circulation pipe (7). The drying chamber (1) is also equipped with a humidity sensor (9) and a temperature sensor (10). The top of the drying chamber (1) is equipped with a dehumidifying fan (11). The dehumidifying fan (11) is connected to an intelligent control system (12). The intelligent control system (12) is electrically connected to the humidity sensor (9), the temperature sensor (10), the air source heat pump host (4), and the dehumidifying fan (11).

2. The novel environmentally friendly plywood drying device according to claim 1, characterized in that: The conveying mechanism (2) is a multi-layer mesh belt conveyor, and its conveying speed is driven by a variable frequency motor. The variable frequency motor is electrically connected to the intelligent control system (12).

3. The novel environmentally friendly plywood drying device according to claim 1, characterized in that: The inner wall of the drying chamber (1) is provided with a heat insulation layer (13).

4. The novel environmentally friendly plywood drying device according to claim 1, characterized in that: The first circulation pipeline (5) is equipped with a circulating water pump (14) and a first control valve (15), and the second circulation pipeline (7) is equipped with a second control valve (16). The circulating water pump (14), the first control valve (15) and the second control valve (16) are all electrically connected to the intelligent control system (12).

5. The novel environmentally friendly plywood drying device according to claim 3, characterized in that: The drying chamber (1) is equipped with a guide plate (17) to distribute hot air evenly and a circulating fan (18).

6. The novel environmentally friendly plywood drying device according to claim 5, characterized in that: The guide plate (17) is arranged in a figure-eight shape towards the interior of the drying chamber (1), and the tilt angle of the guide plate (17) is 25°~45°.

7. The novel environmentally friendly plywood drying device according to claim 1, characterized in that: The outlet end of the dehumidification fan (11) is connected to a waste heat recovery unit (19), which exchanges heat with the fresh air duct (20) that enters the drying chamber (1).

8. The novel environmentally friendly plywood drying device according to claim 1, characterized in that: The air source heat pump unit (4) is a normal temperature air source heat pump.

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