A graphene central heating device with high efficiency air convection structure

Abstract

This invention discloses a graphene central heating device with a highly efficient air convection structure, relating to the field of graphene heating technology. An air inlet is provided on the lower side of the outer wall of the casing. A flow-dividing cavity is provided on the upper side of the outer wall of the air inlet. A partition is provided in the middle of the inner wall of the flow-dividing cavity. An air outlet is provided through the upper side of the outer wall of the partition. The air outlets are arranged in a centrally expanding array. A heat exchange chamber is provided on the upper side of the outer wall of the flow-dividing cavity. A graphene heating unit is provided on the rear side of the inner wall of the heat exchange chamber. A guide plate is provided on the front side of the inner wall of the heat exchange chamber. The guide plates are staggered and form an angle of 30°–60° with the graphene heating unit. This invention, by installing the partition, air outlet, and guide plate, achieves sufficient heat exchange of cold air, allowing cold air to enter the heat exchange space formed by the guide plate at a uniform flow rate, extending the heat exchange time of the cold air, eliminating localized heat accumulation inside the equipment, and improving the heat exchange efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of graphene heating technology, specifically to a graphene central heating device with a highly efficient air convection structure. Background Technology

[0002] With the comprehensive advancement of clean heating policies, electric heating equipment is gradually replacing traditional coal and gas heating equipment. Graphene, with its advantages of ultra-high thermal conductivity, uniform surface heating, rapid heating, and lightweight and easy installation, has become the mainstream heating material for central heating devices. Graphene central heating devices rely on air convection to complete heat transfer and are widely used in large indoor spaces such as residences, offices, and shops.

[0003] The existing device has only a single air inlet. After the cold air enters the cavity, it forms a flow field distribution with high dynamic pressure in the center but extremely low flow velocity on the sides and the top and bottom edges. The cold air directly washes over the central area of ​​the heating element. There is almost no airflow at the four corners and the two side edges of the graphene heating unit, forming a heat exchange blind zone. The heat dissipation rate of the large-area heating plate varies greatly. The heat in the center is quickly carried away, while the heat accumulates at the edges. The overall utilization rate of the heat source is insufficient, which greatly weakens the energy-saving advantage of graphene's high thermal conductivity.

[0004] Patent CN109028263B discloses a graphene-heated water circulation heating unit. The patent realizes the recycling and utilization of the heat energy carried by the used hot water, which is more in line with the concept of energy conservation and environmental protection.

[0005] The aforementioned patent prevents heat loss by placing thermally conductive nylon around the insulation filling tube and spraying a silver coating on its outer surface. It also prevents heat loss from the recycled water by installing a hot water recovery pipe inside the insulation filling tube. Furthermore, it installs a reheating water pipe inside the hot water recovery pipe, allowing the water in the reheating water pipe to absorb heat from the hot water recovery pipe and be heated. This recycles and reuses the heat energy carried by the used hot water, which is more in line with the concept of energy conservation and environmental protection. However, there is room for optimization in terms of uniform airflow distribution to eliminate heat exchange blind spots.

[0006] Therefore, this application proposes a graphene central heating device with a highly efficient air convection structure that allows for sufficient heat exchange of cold air. Summary of the Invention

[0007] The purpose of this invention is to provide a graphene central heating device with a high-efficiency air convection structure to solve the technical problems of uneven airflow distribution and heat exchange blind zones mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a graphene central heating device with a high-efficiency air convection structure, comprising a shell, an air inlet provided on the lower side of the outer wall of the shell, a flow-dividing cavity provided on the upper side of the outer wall of the air inlet, a partition provided in the middle of the inner wall of the flow-dividing cavity, an air outlet provided through the upper side of the outer wall of the partition, the air outlets being distributed in a centrally expanding array, a heat exchange cavity provided on the upper side of the outer wall of the flow-dividing cavity, a graphene heating unit provided on the rear side of the inner wall of the heat exchange cavity, a guide plate provided on the front side of the inner wall of the heat exchange cavity, the guide plate being staggered and forming an angle of 30°-60° with the graphene heating unit, the front and rear ends of the guide plate contacting the heat exchange cavity and the graphene heating unit respectively, a controller provided on the front side of the outer wall of the shell, and the graphene heating unit being connected to the controller via a signal line.

[0009] Preferably, the graphene heating unit is composed of a metal substrate, an insulating and thermally conductive layer, a graphene heating film layer, and a surface protective layer. The metal substrate is disposed on the rear side of the inner wall of the heat exchange cavity, the insulating and thermally conductive layer is disposed on the front side of the outer wall of the metal substrate, the graphene heating film layer is disposed on the front side of the outer wall of the insulating and thermally conductive layer, and the surface protective layer is disposed on the front side of the outer wall of the graphene heating film layer.

[0010] Preferably, an air outlet is provided through the upper side of the outer wall of the housing, and the air outlets are distributed in an array. Each air outlet is provided with a guide louver at the connection between it and the housing. Each guide louver is provided with a rotating shaft at the connection between it and the housing. An angle sensor is provided at the connection between the rotating shaft and the housing. An adjustment motor is provided on the upper side of the inner wall of the housing. The output end of the adjustment motor is connected to the rotating shaft. Temperature sensors are provided on the surface protective layer and on the upper side of the inner wall of the housing near the air outlet. The number of adjustment motors, temperature sensors and guide plates is the same as the number of air outlets. The angle sensor, adjustment motor and temperature sensor are respectively connected to the controller through signal lines.

[0011] Preferably, a compensation port is provided on the lower side of the outer wall of the guide plate, and the compensation ports are distributed in an array. The guide plate is connected to the flow distribution chamber through a connecting pipe. A compensation valve is provided at the connection between the compensation port and the guide plate. A pressure sensor is embedded on the lower side of the outer wall of the guide plate. The compensation valve and the pressure sensor are respectively connected to the controller through signal lines.

[0012] Preferably, a filter screen is provided at the connection between the air inlet and the housing, a rectifier plate is provided on the lower side of the outer wall of the diversion cavity, and ventilation holes are provided through the upper side of the outer wall of the rectifier plate. The ventilation holes are evenly distributed in an array. A slide rail is provided on the lower side of the inner wall of the housing. Limit blocks are provided on both the upper and lower sides of the inner wall of the slide rail. The rectifier plate is connected to the slide rail via a slider. A reset spring is provided on the lower side of the outer wall of the rectifier plate. The two ends of the reset spring are connected to the rectifier plate and the housing, respectively. Differential pressure sensors are provided on the upper side of the outer wall of the rectifier plate and on the left and right sides of the inner wall of the housing. The differential pressure sensors are connected to the controller via signal lines.

[0013] Preferably, a flow guide plate is provided on the upper side of the outer wall of the guide plate, and the guide plate is connected to the air outlet through the flow guide plate.

[0014] Preferably, the outer wall of the surface protective layer is provided with protrusions, which are distributed in an array along the folding direction of the guide plate.

[0015] Preferably, a fan is provided on the lower side of the outer wall of the air inlet, and a wind speed sensor is provided on the upper side of the outer wall of the air inlet. The fan and the wind speed sensor are respectively connected to the controller through signal lines.

[0016] Preferably, a collection trough is provided on the lower side of the inner wall of both the flow divider and the heat exchanger, and a drain outlet is provided on the lower side of the outer wall of the shell. The collection trough is connected to the drain outlet through a connecting pipe, and a one-way valve is provided at the connection between the drain outlet and the shell.

[0017] Preferably, a slide rail 2 is provided at the connection between the housing and the left and right sides of the outer wall of the guide plate. The guide plate is connected to the slide rail 2 through a slider 2. A displacement sensor is provided on the upper side of the outer wall of the slider 2. The displacement sensor is connected to the controller through a signal line.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, by installing baffles, air outlets, and guide plates, achieves the function of full heat exchange of cold air, solves the problems of uneven air intake, heat exchange blind spots on the heating surface, and low heat source utilization. It enables cold air to enter the heat exchange space formed by the guide plates at a uniform flow rate, prolongs the heat exchange time of cold air, eliminates local heat accumulation inside the equipment, improves the heat exchange efficiency of the equipment, and extends the service life of the equipment.

[0020] 2. This invention achieves adaptive air supply by installing an air outlet, guide louvers, angle sensor, temperature sensor and deflector plate. It solves the problems of uneven hot air distribution caused by uniform air outlet opening, inability to differentiate hot air adjustment and hot air accumulation forming eddies. It can expand the hot air coverage range, avoid hot air accumulation inside the equipment, reduce hot air loss and improve the equipment's adaptability to different scenarios.

[0021] 3. This invention, by installing a compensation port, a compensation valve, a pressure sensor, a slide rail II, and a slider II, realizes the function of compensating for the air pressure in the cold air flow channel. It solves the problems of uneven air pressure affecting cold air heat exchange, the inability of fixed flow channels to adapt to air volume fluctuations, and the inability to correct airflow distribution deviations. It can actively compensate for areas with insufficient air pressure, so that the air pressure in each flow channel in the heat exchange chamber is consistent, ensuring the heat exchange effect of the equipment and improving the heat exchange uniformity.

[0022] 4. This invention achieves the function of cold air rectification by installing a rectifier plate, ventilation holes, slide rail 1, slider 1 and return spring, which solves the problems of insufficient heat exchange at the edge of turbulent airflow, large temperature difference of air outlet, and poor cold air uniformity. It can passively adjust the height of the rectifier plate according to different cold air supply, thereby improving the uniformity of airflow distribution and hot air uniformity. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a front view of the present invention.

[0025] Figure 3 This is a schematic diagram of the graphene heating unit structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the air guide louver and rotating shaft structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the guide plate and compensation port structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the rectifier plate and slide rail structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the air inlet and fan structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the collection tank and drain outlet structure of the present invention.

[0031] In the diagram: 1. Housing; 2. Air inlet; 3. Flow divider; 4. Partition; 5. Air outlet; 6. Heat exchange chamber; 7. Graphene heating unit; 8. Guide plate; 9. Controller; 10. Metal substrate; 11. Insulating and thermally conductive layer; 12. Graphene heating film layer; 13. Surface protective layer; 14. Air outlet; 15. Guide louvers; 16. Rotating shaft; 17. Angle sensor; 18. Adjustment motor; 19. Temperature sensor; 20. Compensation 21. Compensating valve; 22. Pressure sensor; 23. Filter screen; 24. Rectifier plate; 25. Ventilation hole; 26. Slide rail one; 27. Limit block; 28. Slider one; 29. ​​Return spring; 30. Differential pressure sensor; 31. Drain plate; 32. Protrusion; 33. Fan; 34. Wind speed sensor; 35. Collection tank; 36. Drain outlet; 37. Check valve; 38. Slide rail two; 39. Slider two; 40. Displacement sensor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 A graphene central heating device with a high-efficiency air convection structure includes a housing 1. An air inlet 2 is provided on the lower side of the outer wall of the housing 1. A flow distribution cavity 3 is provided on the upper side of the outer wall of the air inlet 2. A partition 4 is provided in the middle of the inner wall of the flow distribution cavity 3. An air outlet 5 is provided through the upper side of the outer wall of the partition 4. The air outlet 5 is distributed in a center-expanding array. A heat exchange cavity 6 is provided on the upper side of the outer wall of the flow distribution cavity 3. A graphene heating unit 7 is provided on the rear side of the inner wall of the heat exchange cavity 6. A guide plate 8 is provided on the front side of the inner wall of the heat exchange cavity 6. The guide plates 8 are staggered and form an angle of 30°-60° with the graphene heating unit 7. The front and rear ends of the guide plate 8 are in contact with the heat exchange cavity 6 and the graphene heating unit 7, respectively. A controller 9 is provided on the front side of the outer wall of the housing 1. The graphene heating unit 7 is connected to the controller 9 through a signal line.

[0036] The graphene heating unit 7 is composed of a metal substrate 10, an insulating and thermally conductive layer 11, a graphene heating film layer 12, and a surface protective layer 13. The metal substrate 10 is disposed on the rear side of the inner wall of the heat exchange cavity 6, the insulating and thermally conductive layer 11 is disposed on the front side of the outer wall of the metal substrate 10, the graphene heating film layer 12 is disposed on the front side of the outer wall of the insulating and thermally conductive layer 11, and the surface protective layer 13 is disposed on the front side of the outer wall of the graphene heating film layer 12.

[0037] A fan 33 is installed on the lower side of the outer wall of the air inlet 2, and a wind speed sensor 34 is installed on the upper side of the outer wall of the air inlet 2. The fan 33 and the wind speed sensor 34 are respectively connected to the controller 9 through signal lines.

[0038] Furthermore, the user starts the device via controller 9. Controller 9 selectively activates fan 33 according to user needs. For example, when used in a small space, controller 9 does not activate fan 33; when used in a large space, controller 9 activates fan 33. Outside air enters the housing 1 through air inlet 2. The cold air is processed by filter 23 and then enters the distribution chamber 3. The cold air fills the distribution chamber 3, forming a static pressure buffer and completing the initial pressure stabilization. Subsequently, the air flows into the heat exchange chamber 6 through the air outlet 5 on the partition 4. The aperture gradually increases from the center outwards, for example, from 3-5mm to 8-10mm. The airflow pressure is high in the central area of ​​the distribution chamber 3. The small-diameter air outlet 5 in the central area of ​​the baffle 4 increases airflow resistance and reduces the cold air velocity. The airflow pressure is low in other areas of the distribution chamber 3. The large-diameter air outlet 5 around the baffle 4 reduces airflow resistance and increases the ventilation around the baffle 4. Cold air enters the heat exchange chamber 6 at a relatively uniform velocity through the air outlet 5, thus avoiding uneven heat exchange caused by uneven cold air velocity. After entering the heat exchange chamber 6, the cold air exchanges heat with the graphene heating unit 7. The controller 9 connects the graphene heating film layer 12 to an external power source. The graphene material converts electrical energy into heat energy through the Joule effect. The heat is conducted into the interior of the heat exchange chamber 6 through the surface protective layer 13. Multiple sets of staggered guide plates 8 divide the interior of the heat exchange chamber 6 into multiple separate heat exchange spaces. Each set of guide plates 8 forms multiple continuously folded flow channels. The cold air continuously folds back and diffuses laterally along the inclined guide plates 8, allowing the cold air to adhere closely to the surface protective layer. Layer 13 exchanges heat with the graphene heating unit 7. The staggered guide plates 8 cause the cold air to repeatedly change its flow direction during its ascent, increasing the residence time of the cold air in the heat exchange cavity 6. At the same time, it can break the laminar flow state of the airflow, induce strong turbulence, and destroy the static air boundary layer near the heating surface of the graphene heating unit 7, so that the low temperature air can continuously scour the high temperature surface, improve the air convection heat transfer efficiency, and allow the cold air to fully contact the graphene heating unit 7. The heat-exchanged hot air is discharged from the air outlet 14.

[0039] Example 2: Please refer to Figure 1 , Figure 2 , Figure 4and Figure 8 A graphene central heating device with a high-efficiency air convection structure includes a housing 1. An air inlet 2 is provided on the lower side of the outer wall of the housing 1. A flow distribution cavity 3 is provided on the upper side of the outer wall of the air inlet 2. A partition 4 is provided in the middle of the inner wall of the flow distribution cavity 3. An air outlet 5 is provided through the upper side of the outer wall of the partition 4. The air outlet 5 is distributed in a center-expanding array. A heat exchange cavity 6 is provided on the upper side of the outer wall of the flow distribution cavity 3. A graphene heating unit 7 is provided on the rear side of the inner wall of the heat exchange cavity 6. A guide plate 8 is provided on the front side of the inner wall of the heat exchange cavity 6. The guide plates 8 are staggered and form an angle of 30°-60° with the graphene heating unit 7. The front and rear ends of the guide plate 8 are in contact with the heat exchange cavity 6 and the graphene heating unit 7, respectively. A controller 9 is provided on the front side of the outer wall of the housing 1. The graphene heating unit 7 is connected to the controller 9 through a signal line.

[0040] An air outlet 14 is provided through the upper side of the outer wall of the housing 1. The air outlets 14 are arranged in an array. A guide louver 15 is provided at the connection between the air outlet 14 and the housing 1. A rotating shaft 16 is provided at the connection between the guide louver 15 and the housing 1. An angle sensor 17 is provided at the connection between the rotating shaft 16 and the housing 1. An adjustment motor 18 is provided on the upper side of the inner wall of the housing 1. The output end of the adjustment motor 18 is connected to the rotating shaft 16. Temperature sensors 19 are provided on the surface protective layer 13 and the upper side of the inner wall of the housing 1 near the air outlet 14. The number of adjustment motors 18, temperature sensors 19 and guide plates 8 is the same as the number of air outlets 14. Angle sensors 17, adjustment motors 18 and temperature sensors 19 are respectively connected to controller 9 through signal lines.

[0041] A flow guide plate 31 is provided on the upper side of the outer wall of the flow guide plate 8, and the flow guide plate 8 is connected to the air outlet 14 through the flow guide plate 31;

[0042] Furthermore, after the cold air enters the heat exchange chamber 6 for heat exchange, each set of guide plates 8 corresponds to a set of guide plates 31, guiding the hot air to be discharged from the corresponding air outlet 14. This avoids the hot air freely diffusing and colliding in the top cavity of the shell 1 to form vortices. The hot air is discharged from the corresponding air outlet 14, reducing the hot air pressure loss. At the same time, it ensures that the air volume of each air outlet 14 is the same, allowing the hot air to diffuse more gently and avoiding the discomfort caused by concentrated direct hot air blowing. At the same time, each air outlet 14 is equipped with guide louvers 15. The controller 9 controls the operation of the regulating motor 18 according to the user's instructions. The regulating motor 18 drives the guide louvers 15 to rotate through the rotating shaft 16. After sensor 17 detects that the guide louver 15 has rotated to a specified angle, controller 9 controls the regulating motor 18 to stop running. By changing the pitch angle of the guide louver 15, the air delivery direction of each air outlet 14 is adjusted, so that the hot air diffuses at different angles. When temperature sensor 19 detects that the temperature of a certain air outlet 14 is too high, controller 9 controls the regulating motor 18 at that air outlet 14 to drive the rotating shaft 16 to adjust the angle of the guide louver 15, increase the diffusion angle of the hot air and accelerate the heat diffusion. When the temperature is too low, controller 9 controls the regulating motor 18 to adjust the angle of the guide louver 15, so that the hot air is concentrated and the heat loss is reduced.

[0043] Example 3: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 A graphene central heating device with a high-efficiency air convection structure includes a housing 1. An air inlet 2 is provided on the lower side of the outer wall of the housing 1. A flow distribution cavity 3 is provided on the upper side of the outer wall of the air inlet 2. A partition 4 is provided in the middle of the inner wall of the flow distribution cavity 3. An air outlet 5 is provided through the upper side of the outer wall of the partition 4. The air outlet 5 is distributed in a center-expanding array. A heat exchange cavity 6 is provided on the upper side of the outer wall of the flow distribution cavity 3. A graphene heating unit 7 is provided on the rear side of the inner wall of the heat exchange cavity 6. A guide plate 8 is provided on the front side of the inner wall of the heat exchange cavity 6. The guide plates 8 are staggered and form an angle of 30°-60° with the graphene heating unit 7. The front and rear ends of the guide plate 8 are in contact with the heat exchange cavity 6 and the graphene heating unit 7, respectively. A controller 9 is provided on the front side of the outer wall of the housing 1. The graphene heating unit 7 is connected to the controller 9 through a signal line.

[0044] The lower side of the outer wall of the guide plate 8 is provided with a compensation port 20, which is arranged in an array. The guide plate 8 is connected to the diversion cavity 3 through a connecting pipe. A compensation valve 21 is provided at the connection between the compensation port 20 and the guide plate 8. A pressure sensor 22 is embedded in the lower side of the outer wall of the guide plate 8. The compensation valve 21 and the pressure sensor 22 are respectively connected to the controller 9 through signal lines.

[0045] A fan 33 is installed on the lower side of the outer wall of the air inlet 2, and a wind speed sensor 34 is installed on the upper side of the outer wall of the air inlet 2. The fan 33 and the wind speed sensor 34 are respectively connected to the controller 9 through signal lines.

[0046] The housing 1 and the guide plate 8 are connected by slide rails 38 on the left and right sides of the outer wall. The guide plate 8 is connected to slide rails 38 via sliders 39. A displacement sensor 40 is provided on the upper side of the outer wall of sliders 39. The displacement sensor 40 is connected to the controller 9 via a signal line.

[0047] Furthermore, during the continuous blowing of hot air by the equipment, the wind speed sensor 34 at the air inlet 2 detects the wind speed entering the housing 1. When the air intake is lower than the set threshold, it is determined that the supply of cold air is insufficient. At this time, due to insufficient air pressure between the guide plates 8, the guide plates 8 move downward along the slide rail 38 with the assistance of the slider 2 39. The spacing between each set of guide plates 8 decreases, reducing the airflow area, thereby ensuring that stable heat exchange can still be maintained when the supply of cold air is insufficient. Subsequently, the controller 9 controls the fan 33 to start, increasing the supply of cold air, and the wind speed sensor 34 detects the real-time air flow. The airflow is adjusted until the intake air volume returns to the target range. After the cold air enters the heat exchange chamber 6, the pressure sensor 22 on the guide plate 8 monitors the air pressure between the guide plates 8. If the pressure sensor 22 between two guide plates 8 in a set of guide plates 8 detects that the air pressure in that area is lower than the set value, the controller 9 determines that there is local pressure unevenness in that area. The controller 9 controls the compensation valve 21 of the guide plate 8 above that area to open, connecting the guide plate 8 to the diversion chamber 3. The cold air in the diversion chamber 3 flows into that area from the compensation port 20, compensating for the airflow in that area. The controller 9 increases the local air pressure in the area to prevent instantaneous air pressure fluctuations at the air inlet 2, which could interfere with the stable operation of the fan 33. After adjustment, the controller 9 closes the compensation valve 21, disconnecting the guide plate 8 from the flow distribution chamber 3. When the supply of cold air is sufficient, the air pressure between the guide plates 8 returns to normal. Under the action of air pressure, the guide plates 8 move upward along the slide rail 2 38, increasing the spacing between the guide plates 8 and restoring the air circulation area. When the user's heating demand increases, the controller 9 controls the fan 33 to provide more cold air, increasing the air pressure between the guide plates 8 and the flow distribution chamber 3. Plate 8 moves further upward along slide rail 2 38 to ensure stable hot air temperature and normal wind speed. If it is necessary to actively adjust the spacing of a certain set of guide plates 8, an active power source can be provided to slider 2 39, and the spacing of guide plates 8 can be actively adjusted under the auxiliary monitoring of displacement sensor 40. For example, when rapid heating is required, the cold air supply at air inlet 2 is increased while the spacing of guide plates 8 is reduced, so that the turbulence intensity of cold air passing through guide plates 8 is further increased, improving the convective heat transfer effect and maintaining the outlet air temperature of large air volume, thereby achieving the effect of rapid heating.

[0048] Example 4: Please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 A graphene central heating device with a high-efficiency air convection structure includes a housing 1. An air inlet 2 is provided on the lower side of the outer wall of the housing 1. A flow distribution cavity 3 is provided on the upper side of the outer wall of the air inlet 2. A partition 4 is provided in the middle of the inner wall of the flow distribution cavity 3. An air outlet 5 is provided through the upper side of the outer wall of the partition 4. The air outlet 5 is distributed in a center-expanding array. A heat exchange cavity 6 is provided on the upper side of the outer wall of the flow distribution cavity 3. A graphene heating unit 7 is provided on the rear side of the inner wall of the heat exchange cavity 6. A guide plate 8 is provided on the front side of the inner wall of the heat exchange cavity 6. The guide plates 8 are staggered and form an angle of 30°-60° with the graphene heating unit 7. The front and rear ends of the guide plate 8 are in contact with the heat exchange cavity 6 and the graphene heating unit 7, respectively. A controller 9 is provided on the front side of the outer wall of the housing 1. The graphene heating unit 7 is connected to the controller 9 through a signal line.

[0049] A filter screen 23 is provided at the connection between the air inlet 2 and the housing 1. A rectifier plate 24 is provided on the lower side of the outer wall of the diversion cavity 3. A ventilation hole 25 is provided through the upper side of the outer wall of the rectifier plate 24. The ventilation holes 25 are evenly distributed in an array. A slide rail 26 is provided on the lower side of the inner wall of the housing 1. Limit blocks 27 are provided on both the upper and lower sides of the inner wall of the slide rail 26. The rectifier plate 24 is connected to the slide rail 26 through a slider 28. A return spring 29 is provided on the lower side of the outer wall of the rectifier plate 24. The two ends of the return spring 29 are connected to the rectifier plate 24 and the housing 1 respectively. Differential pressure sensors 30 are provided on the upper side of the outer wall of the rectifier plate 24 and on both the left and right sides of the inner wall of the housing 1. The differential pressure sensors 30 are connected to the controller 9 through a signal line.

[0050] Furthermore, when cold air enters the housing 1 from the air inlet 2, the filter 23 performs preliminary filtration, removing impurities such as dust and hair from the air. Simultaneously, with the assistance of the differential pressure sensor 30, if the airflow at the air inlet 2 decreases and the air pressure is abnormally low, the controller 9 determines that the filter 23 is clogged and notifies the user to clean it. The filtered cold air directly impacts the rectifier plate 24, passing through the evenly distributed ventilation holes 25 on the rectifier plate 24, breaking the turbulent airflow into multiple smaller airflows in the same direction, dispersing the vortex of the cold air entering the housing 1, and causing the cold air to flow upwards more orderly. When the supply of cold air increases… When the air pressure at the air inlet 2 increases, the impact force of the cold air on the rectifier plate 24 increases. If the thrust of the cold air can overcome the elastic force of the return spring 29, the rectifier plate 24 will move upward along the slide rail 26 with the assistance of the slider 28. The passive displacement of the rectifier plate 24 will offset the sudden increase in air pressure and prevent the sudden change in air pressure from being directly transmitted upward. When the supply of cold air decreases, the thrust of the cold air on the rectifier plate 24 cannot overcome the elastic force of the return spring 29. Under the action of the return spring 29, the rectifier plate 24 will move downward along the slide rail 26 to maintain the stability of the air pressure below the rectifier plate 24, so that the cold air is in a relatively stable state before entering the splitting chamber 3.

[0051] Example 5: Please refer to Figure 1 , Figure 3 and Figure 8 A graphene central heating device with a high-efficiency air convection structure, wherein the outer wall of the surface protective layer 13 is provided with protrusions 32, and the protrusions 32 are arrayed along the folding direction of the guide plate 8.

[0052] The lower inner wall of the diversion chamber 3 and the heat exchange chamber 6 are provided with a collection tank 35, and the lower outer wall of the shell 1 is provided with a drain outlet 36. The collection tank 35 is connected to the drain outlet 36 through a connecting pipe, and a one-way valve 37 is provided at the connection between the drain outlet 36 and the shell 1.

[0053] Furthermore, during equipment use, if the humidity in the external environment is high, when the equipment starts at a low temperature, the cold air entering the housing 1 will condense into liquid water droplets upon contact with the lower-temperature surface protective layer 13 or other structures. The condensate flows downwards under gravity. The protrusions 32 on the surface of the surface protective layer 13 disrupt the surface continuity of the layer, preventing the condensate from forming a complete, continuous water film. This allows the condensate to more easily collect at the edges of the protrusions 32, enabling it to detach from the surface protective layer 13 and flow downwards more quickly. Meanwhile, the protrusions 32 arranged in an array along the folding direction of the guide plate 8 form a flow guiding structure on the surface of the protective layer 13, so that the condensate flows in an orderly manner along the protrusions 32. Finally, the condensate falls into the collection tank 35 below the heat exchange chamber 6. After a certain amount of condensate accumulates in the collection tank 35 at the flow distribution chamber 3 and the heat exchange chamber 6, the one-way valve 37 automatically opens to discharge the condensate in the collection tank 35. When there is no water accumulation in the collection tank 35, the one-way valve 37 closes to prevent outside air, dust or mosquitoes from entering the shell 1 from the drain outlet 36 in reverse.

[0054] Working principle: The user starts the equipment through the controller 9. The controller 9 selectively turns on the fan 33 according to the user's needs to adjust the cold air supply of the air inlet 2. When the cold air supply increases, the reset spring 29's reset force on the rectifier plate 24 is less than the cold air thrust. The rectifier plate 24 moves upward along the slide rail 26 to increase the buffer space of the cold air and absorb the impact energy of sudden wind pressure changes. Conversely, when the cold air supply decreases, the reset spring 29 drives the rectifier plate 24 to move downward to avoid excessive reduction of the cold air pressure in the housing 1. The cold air passes through the evenly distributed ventilation holes 25 on the rectifier plate 24, which divides the large turbulent airflow into multiple small airflows in the same direction. The cold air enters the space between the rectifier plate 24 and the partition plate 4, completing two buffering processes.

[0055] After entering the splitting cavity 3, the cold air flows into the heat exchange cavity 6 through the air outlet 5 on the partition 4. The diameter of the air outlet 5 gradually increases from the center to the periphery. The small diameter air outlet 5 increases the resistance of the cold air with high dynamic pressure in the center, while the large diameter air outlet 5 reduces the resistance of the cold air with low dynamic pressure in the periphery, so that the cold air enters the heat exchange cavity 6 at a relatively uniform flow rate. Multiple sets of guide plates 8 in the heat exchange cavity 6 guide the cold air to contact the graphene heating unit 7. Each set of guide plates 8 forms multiple continuous folded flow channels. The cold air continuously folds and diffuses in the flow channels, prolonging the residence time of the cold air while allowing the cold air to fully contact the graphene heating unit 7.

[0056] After cold air enters the heat exchange chamber 6, the spacing between each set of guide vanes 8 increases or decreases with the change in the cold air supply, thereby ensuring that the air pressure between each set of guide vanes 8 can maintain a stable hot air outlet pressure when the cold air supply changes. When the pressure sensor 22 detects that the air pressure at a certain point in a certain set of guide vanes 8 is lower than the set value, the controller 9 controls the compensation valve 21 of the guide vane 8 located above that point to open, connecting the diversion chamber 3 with the compensation port 20 to compensate for the air pressure at that point. After the air pressure of that set of guide vanes 8 returns to normal, the controller 9 closes the compensation valve 21.

[0057] After heat exchange, the hot air is guided by the deflector plate 31 and discharged from the corresponding air outlet 14. According to user needs, the controller 9 controls the adjustment motor 18 to drive the guide louvers 15 to rotate through the rotating shaft 16, so that the hot air is diffused at different angles. When the temperature sensor 19 at the air outlet 14 detects an abnormal temperature at a certain air outlet 14, the controller 9 adjusts the pitch angle of the guide louvers 15 by adjusting the adjustment motor 18. When the temperature is too high, the pitch angle of the guide louvers 15 is increased to accelerate heat diffusion. When the temperature is too low, the pitch angle of the guide louvers 15 is decreased to concentrate the hot air and reduce heat loss.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A graphene central heating device with a high-efficiency air convection structure, characterized in that: The system includes a housing (1), an air inlet (2) on the lower side of the outer wall of the housing (1), a flow divider (3) on the upper side of the outer wall of the air inlet (2), a partition (4) in the middle of the inner wall of the flow divider (3), an air outlet (5) through the upper side of the outer wall of the partition (4), the air outlet (5) being arranged in a centrally expanding array, a heat exchange chamber (6) on the upper side of the outer wall of the flow divider (3), and a stone on the rear side of the inner wall of the heat exchange chamber (6). The graphene heating unit (7) has a guide plate (8) on the front side of the inner wall of the heat exchange cavity (6). The guide plate (8) is arranged in a staggered manner and forms an angle of 30°-60° with the graphene heating unit (7). The front and rear ends of the guide plate (8) are in contact with the heat exchange cavity (6) and the graphene heating unit (7) respectively. The front side of the outer wall of the shell (1) is provided with a controller (9). The graphene heating unit (7) is connected to the controller (9) through a signal line.

2. The graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: The graphene heating unit (7) is composed of a metal substrate (10), an insulating and thermally conductive layer (11), a graphene heating film layer (12), and a surface protective layer (13). The metal substrate (10) is disposed on the rear side of the inner wall of the heat exchange cavity (6), the insulating and thermally conductive layer (11) is disposed on the front side of the outer wall of the metal substrate (10), the graphene heating film layer (12) is disposed on the front side of the outer wall of the insulating and thermally conductive layer (11), and the surface protective layer (13) is disposed on the front side of the outer wall of the graphene heating film layer (12).

3. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: An air outlet (14) is provided through the upper side of the outer wall of the housing (1). The air outlets (14) are arranged in an array. A guide louver (15) is provided at the connection between the air outlet (14) and the housing (1). A rotating shaft (16) is provided at the connection between the guide louver (15) and the housing (1). An angle sensor (17) is provided at the connection between the rotating shaft (16) and the housing (1). An adjustment motor (18) is provided on the upper side of the inner wall of the housing (1). The output end of the adjustment motor (18) is connected to the rotating shaft (16). A temperature sensor (19) is provided on the surface protective layer (13) and the upper side of the inner wall of the housing (1) near the air outlet (14). The number of adjustment motors (18), temperature sensors (19) and guide plates (8) is the same as the number of air outlets (14). Angle sensors (17), adjustment motors (18) and temperature sensors (19) are connected to the controller (9) through signal lines.

4. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: The lower side of the outer wall of the guide plate (8) is provided with a compensation port (20), which is arranged in an array. The guide plate (8) is connected to the diversion chamber (3) through a connecting pipe. A compensation valve (21) is provided at the connection between the compensation port (20) and the guide plate (8). A pressure sensor (22) is embedded in the lower side of the outer wall of the guide plate (8). The compensation valve (21) and the pressure sensor (22) are respectively connected to the controller (9) through signal lines.

5. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: A filter screen (23) is provided at the connection between the air inlet (2) and the housing (1). A rectifier plate (24) is provided on the lower side of the outer wall of the diversion cavity (3). A ventilation hole (25) is provided through the upper side of the outer wall of the rectifier plate (24). The ventilation holes (25) are evenly distributed in an array. A slide rail (26) is provided on the lower side of the inner wall of the housing (1). Limit blocks (27) are provided on both the upper and lower sides of the inner wall of the slide rail (26). The rectifier plate (24) is connected to the slide rail (26) through a slider (28). A reset spring (29) is provided on the lower side of the outer wall of the rectifier plate (24). The two ends of the reset spring (29) are connected to the rectifier plate (24) and the housing (1) respectively. A differential pressure sensor (30) is provided on the upper side of the outer wall of the rectifier plate (24) and the left and right sides of the inner wall of the housing (1). The differential pressure sensor (30) is connected to the controller (9) through a signal line.

6. A graphene central heating device with a high-efficiency air convection structure according to claim 3, characterized in that: The upper side of the outer wall of the guide plate (8) is provided with a flow guide plate (31), and the guide plate (8) is connected to the air outlet (14) through the flow guide plate (31).

7. A graphene central heating device with a high-efficiency air convection structure according to claim 2, characterized in that: The outer wall of the surface protective layer (13) is provided with protrusions (32), which are arranged in an array along the folding direction of the guide plate (8).

8. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: A fan (33) is provided on the lower side of the outer wall of the air inlet (2), and a wind speed sensor (34) is provided on the upper side of the outer wall of the air inlet (2). The fan (33) and the wind speed sensor (34) are respectively connected to the controller (9) through signal lines.

9. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: The lower side of the inner wall of the diversion chamber (3) and the heat exchange chamber (6) are provided with a collection tank (35), and the lower side of the outer wall of the shell (1) is provided with a drain outlet (36). The collection tank (35) is connected to the drain outlet (36) through a connecting pipe, and a one-way valve (37) is provided at the connection between the drain outlet (36) and the shell (1).

10. A graphene central heating device with a high-efficiency air convection structure according to claim 1, characterized in that: The housing (1) and the guide plate (8) are connected by a slide rail (38) on the left and right sides. The guide plate (8) is connected to the slide rail (38) via a slider (39). A displacement sensor (40) is provided on the upper side of the outer wall of the slider (39). The displacement sensor (40) is connected to the controller (9) via a signal line.

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