A tobacco seedling raising greenhouse heating system

Abstract

The utility model discloses a kind of tobacco seedling greenhouse heating systems, belong to tobacco production equipment technical field.System includes the heating room and seedling greenhouse of intercommunication, wave-shaped metal heat exchanger fan is equipped in heating room, and movable combustion engine is connected by sliding door track plate, and is linked with intelligent blower;Seedling greenhouse is laid out with multi-stage air brake's hot air pipe and liftable temperature sensor, top is equipped with ventilation flue.Combustion engine waste heat is efficiently conducted after heat exchanger fan, clean hot air is driven by blower into distributed heating system, central control cabinet is according to multipoint temperature feedback real-time regulation air volume and air brake opening, realize ±1.5 ℃ accurate temperature control.System is through multiplexing curing barn equipment, optimization heat cycle path and intelligent joint control, solve traditional heating mode high energy consumption, temperature difference is big and tail gas pollution problem, make fuel cost reduce 30%, while have equipment easy maintenance, prevent ash deposition and safety emission characteristics, applicable to high altitude tobacco seedling scene.

Description

Technical Field

[0001] This utility model relates to the field of tobacco production equipment, and in particular to a heating system for tobacco seedling greenhouses. Background Technology

[0002] In tobacco seedling production, temperature control is a crucial factor affecting seedling quality. High-altitude areas, due to persistently low temperatures and significant diurnal temperature variations, especially during critical seedling stages (such as winter to early spring), face multiple challenges with traditional heating methods: coal-fired or electric heating equipment is energy-intensive, has high operating costs, and poses risks such as excessive CO2 emissions and fire hazards; specialized equipment like hot air furnaces is expensive, making it unaffordable for small seedling bases. Meanwhile, the burners in the tobacco curing barns are idle for extended periods during the off-season, their high-efficiency combustion characteristics not being effectively utilized. While existing technologies attempt to utilize waste heat, they often suffer from low heat exchange efficiency, insufficient temperature control precision, and poor equipment compatibility, making it difficult to achieve stable and uniform greenhouse environment control. This results in inconsistent seedling growth, hindering resource recycling and improving seedling production efficiency.

[0003] Some studies have attempted to recover waste heat by modifying burners, but these generally lack systematic design. For example, directly introducing combustion exhaust gases can easily cause pollution inside the greenhouse, while simple pipe heat transfer methods suffer from significant heat loss and are difficult to adapt to the greenhouse's spatial structure; traditional damper adjustments rely on manual operation and cannot respond to temperature fluctuations in real time. Furthermore, existing devices often lack integrated intelligent control modules, resulting in insufficient energy consumption optimization and a lack of tiered temperature control solutions for the multi-zone temperature differences within the seedling greenhouse. How to efficiently transform the drying oven burner into a safe and low-cost seedling heating system through structural innovation and intelligent integration has become an urgent technical challenge. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a heating system for tobacco seedling greenhouses. Through a specific heating system, the curing barn burner is used to heat the tobacco seedling greenhouse, which not only achieves precise temperature control, but also effectively improves the machine utilization efficiency and reduces the greenhouse heating cost.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A heating system for a tobacco seedling greenhouse includes a heating room and a seedling greenhouse, with their sides interconnected. The heating room is equipped with a heat exchange system, and the seedling greenhouse is equipped with a heating system. A sliding door is installed on the outer wall of the heating room, which slides vertically up and down along tracks on both sides. An intelligent blower is installed on the outer wall of the heating room and connected to the heat exchange system. A control panel is also installed on the outer wall of the heating room to control the operation of the heat exchange system and the heating system.

[0007] In a preferred embodiment, the heat exchange system includes a heat exchange air box, which is installed on the top of the heating room. One end of the heat exchange air box is connected to the air outlet of the blower, and the other end of the heat exchange air box is connected to the heating system of the seedling greenhouse.

[0008] In the preferred embodiment, the heat exchange air box adopts a wave-shaped arrangement and is made of a metal material with good thermal conductivity.

[0009] In a preferred embodiment, the heating system includes a hot air duct, the end of which is connected to a heat exchange air box, and multiple air outlet ducts are equidistantly connected at the lower end face of the hot air duct, with a second air damper provided at the air outlet of each air outlet duct.

[0010] In a preferred embodiment, multiple ventilation ducts are equidistantly arranged on the top surface of the seedling greenhouse, and a first air damper is provided at the air outlet of each ventilation duct.

[0011] In a preferred embodiment, multiple telescopic rods are equidistantly arranged inside the seedling greenhouse. One end of each telescopic rod is vertically connected to the ground of the seedling greenhouse, and a temperature sensor is installed at the other end of the telescopic rod.

[0012] In a preferred embodiment, a track slab is installed on the floor of the heating room, extending outward to the outside of the sliding door. Parallel slide rails are installed on both sides of the track slab, and a sliding plate is installed on the upper surface of the track slab. Rollers are installed at the bottom of the sliding plate and engage with the slide rails on both sides of the track slab. The sliding plate slides along the track slab, and a pull ring is installed on the side of the sliding plate.

[0013] In a preferred embodiment, a central control cabinet is installed on the outer wall of the heating room. The central control cabinet is electrically connected to the blower, control panel, first air damper, second air damper and temperature sensor via control cables.

[0014] In a preferred embodiment, an exhaust vent is provided on the back wall of the heating room, and the size of the exhaust vent can be freely controlled.

[0015] A heating system for tobacco seedling greenhouses has the following beneficial effects during practical use:

[0016] 1. By transforming idle drying oven burners into the core heating system for seedling greenhouses, the equipment can be reused across seasons, significantly reducing the purchase cost of dedicated heating equipment. The staggered use mechanism between the drying and seedling cycles increases the annual utilization rate of the burners by more than 40%. At the same time, by utilizing their high thermal efficiency combustion characteristics and combining them with the wave-shaped heat exchanger design, the heat exchange efficiency is increased by 25% compared to the traditional straight-pipe structure, resulting in significant fuel cost savings.

[0017] 2. The system integrates temperature sensors, a central control cabinet, and an air damper control system. It monitors the temperature inside the greenhouse in real time at multiple points and dynamically adjusts the blower power and air damper opening using intelligent algorithms. Test data shows that this system can control the day-night temperature difference within ±1.5℃, reducing temperature fluctuations by 70% compared to manual control methods, and reducing energy consumption by 30%.

[0018] 3. The design of sliding door track and detachable heat exchange box facilitates the maintenance of the burner and the cleaning of heat exchange components; the distributed heating system supported by telescopic rods is adaptable to different seedling tray heights, making it easy to monitor the real-time temperature of the seedling trays in the greenhouse.

[0019] 4. The independently set exhaust gas channel and closed hot air circulation system effectively isolate combustion exhaust gas from the seedling space, reducing CO2 concentration by 90% compared to open heating schemes; the heat-conducting metal air box, combined with overheat protection, completely eliminates the fire hazards of traditional open flame heating. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the overall structure and appearance of this utility model;

[0022] Figure 2 This is a planar sectional view of the internal structure of this utility model;

[0023] Figure 3 This is a three-dimensional sectional view of the internal structure of this utility model;

[0024] Figure 4 This is an enlarged schematic diagram of the sliding plate structure of this utility model.

[0025] In the diagram: 1. Heating room; 2. Seedling greenhouse; 3. Blower; 4. Sliding door; 5. Control panel; 6. Heat exchanger box; 7. Ventilation flue; 8. Hot air pipe; 9. Air outlet pipe; 10. Telescopic rod; 11. Temperature sensor; 12. First air damper; 13. Second air damper; 14. Central control cabinet; 15. Exhaust vent; 16. Track plate; 17. Sliding plate; 18. Roller; 19. Pull ring. Detailed Implementation

[0026] like Figure 1 As shown, a heating system for a tobacco seedling greenhouse includes a heating room 1 and a seedling greenhouse 2, with the sides of the heating room 1 and the seedling greenhouse 2 interconnected. The heating room 1 is equipped with a heat exchange system to convert the heat energy generated by the burner into clean hot air. The heating system installed in the seedling greenhouse 2 ensures uniform heat diffusion through the distributed layout of hot air pipes 8 and air outlet pipes 9.

[0027] A sliding door 4 is installed on the outer wall of the heating room 1. The sliding door 4 slides vertically up and down along the tracks on both sides, and can be opened and closed quickly through the tracks on both sides, which facilitates equipment maintenance and fuel replenishment. An intelligent blower 3 is installed on the outer wall of the heating room 1 and connected to the heat exchange system. The intelligent blower 3 is fixed to the outer wall of the heating room 1, and its air outlet is directly connected to the heat exchange system. It can dynamically adjust the air volume according to the instructions of the control panel 5 to form a closed-loop temperature control network.

[0028] Preferred solutions include Figure 2 As shown, the heat exchange system includes a heat exchange air box 6, which is fixed to the top of the heating room 1 and is made of copper-aluminum alloy, possessing both high thermal conductivity and corrosion resistance. One end of the heat exchange air box 6 is connected to the air outlet flange of the blower 3, and the other end is connected to the hot air pipe 8 through a sealed interface. The corrugated flow channel design prolongs the contact time between the high-temperature flue gas and the air box wall, and the measured heat exchange efficiency is 28% higher than that of the straight pipe structure, while reducing the risk of dust accumulation.

[0029] Preferred solutions include Figure 2 and Figure 3 As shown, the heating system consists of hot air ducts 8 and branch outlet ducts 9. The hot air ducts 8 extend horizontally along the top of the seedling greenhouse 2, and multiple outlet ducts 9 are welded at equal intervals to their lower ends. Each outlet duct 9 has a second air damper 13 installed at its end, which uses an electric butterfly valve structure and supports stepless adjustment from 0-90°. The airflow of each outlet duct 9 can be independently adjusted via the control panel 5 to achieve gradient temperature control in the seedling area. It can also implement point-to-point temperature control based on the temperature feedback from the temperature sensors 11 in each area.

[0030] Preferred solutions include Figure 2 and Figure 3 As shown, multiple ventilation ducts 7 are equidistantly arranged on the top surface of the seedling greenhouse 2, and a first air damper 12 is installed at the air outlet of the ventilation duct 7. When the humidity inside the greenhouse is too high, the first air damper 12 and the second air damper 13 are opened in conjunction to form a "bottom-up" airflow path, which can quickly remove moisture and avoid the problem of sudden temperature drop caused by traditional roof ventilation.

[0031] Preferred solutions include Figure 2 As shown, multiple telescopic rods 10 are equidistantly arranged inside the seedling greenhouse 2. One end of each telescopic rod 10 is vertically connected to the ground of the seedling greenhouse 2, and a temperature sensor 11 is installed at the other end of the telescopic rod 10. The temperature sensor 11 installed on the top can adjust the monitoring height (adjustment range 0.5-2.5 meters) as the telescopic rod 10 is raised and lowered, so as to accurately adjust and monitor the height of the seedling trays at different growth stages and ensure that the temperature control strategy matches the needs of the crop.

[0032] Preferred solutions include Figure 3 and Figure 4As shown, a track plate 16 is provided on the ground of the heating room 1. The track plate 16 extends outward to the outside of the sliding door 4. Parallel slide rails are provided on both sides of the track plate 16. A sliding plate 17 is provided on the upper surface of the track plate 16. A roller 18 is provided at the bottom of the sliding plate 17 and engages with the slide rails on both sides of the track plate 16. The sliding plate 17 slides along the track plate 16 and a pull ring 19 is provided on the side of the sliding plate 17.

[0033] The track plate 16 is made of stainless steel, and its slide rail cross-section is inverted T-shaped, extending outward to the outside of the sliding door 4. The sliding plate 17 is engaged with the track plate 16 via rollers 18 at the bottom, forming a mobile platform capable of supporting a weight of 200 kg. Operators can easily pull the burner or maintenance tools along the track using the pull ring 19, significantly reducing the difficulty of equipment maintenance.

[0034] Preferred solutions include Figure 1 As shown, the central control cabinet 14 is integrated into the outer wall of the heating room 1, and has a built-in PLC controller and wireless communication module. It is connected to the blower 3, control panel 5, damper actuator and temperature sensor 11 through shielded cables.

[0035] The central control cabinet 14 supports manual / automatic mode switching, can store multiple sets of seedling temperature curves, and displays system energy consumption and fault alarm information in real time. The central control cabinet 14 controls the power of the blower 3 and the opening and closing of the air damper to achieve precise temperature control of the seedling greenhouse 2.

[0036] Preferred solutions include Figure 2 As shown, the exhaust vent 15 on the back wall of the heating room 1 adopts an adjustable louver structure, and the opening area can be controlled by rotating the handle (0-100% continuously adjustable). After the exhaust gas generated by the burner is cooled by the heat exchange air box 6, some of the waste heat is discharged through the exhaust vent 15, which avoids the accumulation of harmful gases in the heating room, while retaining usable heat to participate in the secondary cycle, with a comprehensive heat utilization rate of over 85%.

Claims

1. A heating system for a tobacco seedling greenhouse, comprising a heating room (1) and a seedling greenhouse (2), characterized in that: The heating room (1) and the seedling greenhouse (2) are connected to each other on the side. The heating room (1) is equipped with a heat exchange system, and the seedling greenhouse (2) is equipped with a heating system. A sliding door (4) is installed on the outer wall of the heating room (1). The sliding door (4) slides vertically up and down along the tracks on both sides. An intelligent blower (3) is installed on the outer wall of the heating room (1) and connected to the heat exchange system. A control panel (5) is also installed on the outer wall of the heating room (1) to control the operation of the heat exchange system and the heating system. The heat exchange system includes a heat exchange air box (6), which is installed on the top of the heating room (1). One end of the heat exchange air box (6) is connected to the air outlet of the blower (3), and the other end of the heat exchange air box (6) is connected to the heating system of the seedling greenhouse (2). The heat exchange air box (6) adopts a wave-shaped arrangement; A track plate (16) is installed on the ground of the heating room (1). The track plate (16) made of copper-aluminum alloy extends outward to the outside of the sliding door (4). Slide rails are arranged parallel on both sides of the track plate (16). A sliding plate (17) is installed on the upper surface of the track plate (16). Rollers (18) are provided at the bottom of the sliding plate (17) and are engaged with the slide rails on both sides of the track plate (16). The sliding plate (17) slides along the track plate (16) and a pull ring (19) is installed on the side of the sliding plate (17).

2. The heating system for tobacco seedling greenhouses according to claim 1, characterized in that: The heating system includes a hot air pipe (8), the end of which is connected to a heat exchange box (6), and multiple air outlet pipes (9) are equidistantly connected at the lower end face of the hot air pipe (8), and a second air damper (13) is provided at the air outlet of the air outlet pipe (9).

3. The heating system for tobacco seedling greenhouses according to claim 1, characterized in that: Multiple ventilation flues (7) are equidistantly arranged on the top surface of the seedling greenhouse (2), and a first air damper (12) is provided at the air outlet of the ventilation flue (7).

4. The heating system for tobacco seedling greenhouses according to claim 1, characterized in that: Multiple telescopic rods (10) are equidistantly arranged inside the seedling greenhouse (2). One end of the telescopic rod (10) is vertically connected to the ground of the seedling greenhouse (2), and a temperature sensor (11) is installed at the other end of the telescopic rod (10).

5. The heating system for tobacco seedling greenhouses according to claim 4, characterized in that: A central control cabinet (14) is installed on the outer wall of the heating room (1). The central control cabinet (14) is electrically connected to the blower (3), control panel (5), first air damper (12), second air damper (13) and temperature sensor (11) via control cables.

6. The heating system for tobacco seedling greenhouses according to claim 1, characterized in that: An exhaust vent (15) is provided on the back wall of the heating room (1), and the size of the exhaust vent (15) can be freely controlled.

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