Variable frequency speed-regulating control device for heating and ventilating fan

Abstract

This utility model relates to the field of HVAC fan technology and discloses a variable frequency speed control device for an HVAC fan, including a housing, an end cover, and a control module. The end cover is placed on the upper surface of the housing, and the control module is fixedly connected to the inner wall of the top of the end cover. A wire is electrically connected to the top of the control module. A cooling fan is fixedly connected to the inner wall of the bottom of the housing, and a fixing rod is also fixedly connected to the inner wall of the bottom of the housing. The heat dissipation copper plate provided by this utility model has good thermal conductivity, quickly dispersing heat to multiple heat dissipation fins fixed on the fixing rod. The arc-shaped vent holes on the inner wall of the heat dissipation fins increase the contact area with air, accelerating heat dissipation into the internal space of the housing. After the cooling fan at the bottom of the housing is started, it forcibly draws hot air from the housing and discharges it through the air outlet, carrying away more heat and forming forced convection cooling. This ensures that the operating temperature of the control module is maintained within a reasonable range, avoiding control failure or component damage due to high temperature.

Description

Technical Field

[0001] This utility model relates to the field of heating and ventilation fan technology, and in particular to a variable frequency speed control device for heating and ventilation fans. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) fans are key equipment in HVAC systems used to transport air, regulate indoor temperature, and control air quality. They are widely used in buildings, industry, and commerce. HVAC fans use a motor to drive an impeller, drawing air in through the inlet, accelerating it through the impeller, and then expelling it from the outlet, thus achieving air transport and circulation. The HVAC fan is the "heart" of the HVAC system; its performance directly affects indoor environmental quality and energy consumption. When selecting a fan, specific needs must be considered, paying attention to indicators such as air volume, air pressure, noise, and energy efficiency. Regular maintenance is essential to ensure stable operation. For further information on the technical details or solutions for a particular type of fan, please provide your specific scenario for further discussion.

[0003] In the existing technology, the use of heating and ventilation fans requires the use of a control device for frequency conversion speed regulation to meet the usage requirements. However, the long-term high-efficiency operation of the control device will cause internal heat accumulation. In order to ensure the stable operation of the internal circuit, it is not convenient to directly dissipate heat from the inside of the control device. The heat accumulation over a long period of time will damage the control device and affect the performance. In addition, in order to ensure stability, the outer shell of the control device is tightly connected to the heating and ventilation fan, which makes it difficult to maintain the control device in the future. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the prior art where, in order to ensure the stable operation of the internal circuit, it is not convenient to directly dissipate heat from the inside of the control device. Long-term heat accumulation will damage the control device and affect its performance. Furthermore, in order to ensure stability, the outer shell of the control device is tightly connected to the heating and ventilation fan, making it inconvenient to maintain the control device in the future. Therefore, this utility model proposes a variable frequency speed regulation heating and ventilation fan control device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A variable frequency speed control device for a heating and ventilation fan includes a housing, an end cover, and a control module. The end cover is placed on the upper surface of the housing. The control module is fixedly connected to the inner wall of the top of the end cover. A wire is electrically connected to the top of the control module. A cooling fan is fixedly connected to the inner wall of the bottom of the housing. A fixing rod is fixedly connected to the inner wall of the bottom of the housing. Multiple heat dissipation fins are fixedly sleeved on the wall of the fixing rod. A heat dissipation copper plate is fixedly connected to the top of the multiple heat dissipation fins. An air outlet is provided on the side wall of the housing.

[0007] Preferably, a connecting bracket is fixedly connected at the connection between the end cap and the control module.

[0008] Preferably, the bottom of the housing is fixedly connected to an anti-slip pad, and the inner wall of the heat dissipation fins is provided with multiple vent holes, the inner walls of the multiple vent holes being respectively set as arc surfaces.

[0009] Preferably, the inner wall of the box body has a cavity, and a slide rod is slidably provided on the inner wall of the cavity. A locking block is fixedly connected to the rod wall of the slide rod. A locking groove is provided on the inner wall of the cavity, and the locking block is locked in place on the inner wall of the locking groove. A rotating rod is rotatably connected to the inner wall of the end cap, and the bottom end of the rotating rod is fixedly connected to the top end of the slide rod.

[0010] Preferably, the box body is fixedly connected to the inner wall of the slot with an anti-slip pad, and the card block is fitted to the inner wall of the anti-slip pad.

[0011] Preferably, a cylinder is fixedly connected to the side wall of the air outlet of the housing, a spring is fixedly connected to the inner wall of the cylinder, a piston is fixedly connected to the end of the spring, a sealing rubber ring is fixedly connected to the side wall of the piston, the sealing rubber ring is fitted against the inner wall of the cylinder, a guide rod is fixedly connected to the side wall of the piston, a sliding hole is opened at the end of the cylinder, the rod wall of the guide rod is slidably disposed on the inner wall of the sliding hole, and an air outlet is opened on the cylinder wall.

[0012] Compared with the prior art, this utility model provides a variable frequency speed regulation control device for heating and ventilation fans, which has the following beneficial effects:

[0013] 1. This variable frequency speed control heating and ventilation fan control device utilizes the excellent thermal conductivity of the heat dissipation copper plate to quickly disperse heat to multiple heat dissipation fins fixed on the mounting rod. The arc-shaped vents on the inner wall of the heat dissipation fins increase the contact area with air, accelerating heat dissipation into the internal space of the enclosure. After the cooling fan at the bottom of the enclosure is started, it forcibly draws out the hot air from the enclosure. The air is discharged from the side wall vents. Under the action of airflow, the air velocity passing through the heat dissipation fins increases, carrying away more heat and forming forced convection cooling. This ensures that the operating temperature of the control module is maintained within a reasonable range, avoiding control failure or component damage due to high temperature.

[0014] 2. The variable frequency speed control device for the heating and ventilation fan uses a rotating rod inside the end cover to drive a sliding rod to slide up and down in the cavity of the inner wall of the housing. When the locking block on the sliding rod aligns with the locking groove on the inner wall of the housing, the locking block is locked into the locking groove under the action of gravity or a slight external force, thus fixing the end cover to the housing. When disassembling, the rotating rod is rotated in the opposite direction to disengage the locking block from the locking groove, and the end cover can be removed for easy maintenance or debugging of the control module.

[0015] 3. The variable frequency speed control device for the heating and ventilation fan uses airflow to push the piston inside the cylinder to compress the spring. The sealing rubber ring on the piston sidewall ensures airtightness. As the piston moves, the guide rod slides in the sliding hole at the end of the cylinder to prevent the piston from deviating. When the piston moves to a certain position, it opens the air outlet on the cylinder wall, and the high-pressure gas inside the box is discharged. After the air pressure drops, the spring returns to its original position and pushes the piston to close the air outlet, maintaining the air pressure inside the box and preventing external dust and debris from flowing back into the box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a variable frequency speed control device for a heating and ventilation fan proposed in this utility model;

[0017] Figure 2 for Figure 1 Enlarged structural diagram of part A in the middle section;

[0018] Figure 3 for Figure 1 A partial structural side view of the middle box.

[0019] In the diagram: 1. Housing, 2. End cap, 3. Control module, 4. Wire, 5. Connecting bracket, 6. Cooling fan, 7. Anti-slip pad, 8. Fixing rod, 9. Heat dissipation fins, 10. Heat dissipation copper plate, 11. Sliding rod, 12. Locking block, 13. Anti-slip pad, 14. Rotating rod, 15. Cylinder, 16. Spring, 17. Piston, 18. Sealing rubber ring, 19. Guide rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A variable frequency speed control device for a heating and ventilation fan includes a housing 1, an end cover 2, and a control module 3. The end cover 2 is placed on the upper surface of the housing 1. The control module 3 is fixedly connected to the inner wall of the top of the end cover 2. A wire 4 is electrically connected to the top of the control module 3. A cooling fan 6 is fixedly connected to the inner wall of the bottom of the housing 1. A fixing rod 8 is fixedly connected to the inner wall of the bottom of the housing 1. Multiple heat dissipation fins 9 are fixedly sleeved on the rod wall of the fixing rod 8. A heat dissipation copper plate 10 is fixedly connected to the top of the multiple heat dissipation fins 9. An air outlet is opened on the side wall of the housing 1.

[0022] A connecting bracket 5 is fixedly connected at the connection between the end cap 2 and the control module 3. An anti-slip pad 7 is fixedly connected to the bottom of the housing 1. Multiple ventilation holes are opened on the inner wall of the heat dissipation fins 9, and the inner walls of the multiple ventilation holes are respectively set as arc surfaces.

[0023] The inner wall of the box body 1 has a cavity. A sliding rod 11 is slidably installed on the inner wall of the cavity. A locking block 12 is fixedly connected to the rod wall of the sliding rod 11. A locking groove is opened on the inner wall of the cavity of the box body 1. The locking block 12 is locked in the inner wall of the locking groove. A rotating rod 14 is rotatably connected to the inner wall of the end cover 2. The bottom end of the rotating rod 14 is fixedly connected to the top end of the sliding rod 11. An anti-slip pad 13 is fixedly connected to the inner wall of the locking groove of the box body 1. The locking block 12 is fitted against the inner wall of the anti-slip pad 13.

[0024] The heat generated by the control module 3 is conducted to the end cover 2 through the connecting bracket 5, and then transferred to the heat dissipation copper plate 10. The heat dissipation copper plate 10 has good thermal conductivity, which quickly disperses the heat to multiple heat dissipation fins 9 fixed on the fixing rod 8. The arc-shaped vent holes on the inner wall of the heat dissipation fins 9 increase the contact area with the air, accelerating the heat dissipation into the internal space of the housing 1. After the cooling fan 6 at the bottom of the housing 1 is started, it forcibly draws out the hot air in the housing 1. The air is discharged from the air outlet on the side wall. Under the action of airflow, the airflow speed through the heat dissipation fins 9 increases, taking away more heat and forming forced convection cooling, ensuring that the operating temperature of the control module 3 is maintained within a reasonable range, and avoiding control failure or component damage due to high temperature.

[0025] Rotate the rotating rod 14 inside the end cover 2. The rotating rod 14 drives the sliding rod 11 to slide up and down in the cavity of the inner wall of the housing 1. When the locking block 12 on the sliding rod 11 is aligned with the locking groove on the inner wall of the housing 1, the locking block 12 is locked into the locking groove under the action of gravity or slight external force, thereby fixing the end cover 2 to the housing 1. When disassembling, rotate the rotating rod 14 in the opposite direction to make the locking block 12 disengage from the locking groove, and the end cover 2 can be removed, which is convenient for the maintenance or debugging of the control module 3.

[0026] The anti-slip pad 13 on the inner wall of the slot increases the friction between the card block 12 and the slot, preventing the end cover 2 from loosening due to vibration or other reasons during device operation, ensuring that the control module 3 is installed firmly, and avoiding the impact of unstable connection on control signal transmission.

[0027] To prevent external dust and debris from flowing back into housing 1, such as Figure 1-3 As shown, a cylinder 15 is fixedly connected to the side wall of the air outlet of the housing 1. A spring 16 is fixedly connected to the inner wall of the cylinder 15. A piston 17 is fixedly connected to the end of the spring 16. A sealing rubber ring 18 is fixedly connected to the side wall of the piston 17. The sealing rubber ring 18 is fitted to the inner wall of the cylinder 15. A guide rod 19 is fixedly connected to the side wall of the piston 17. A sliding hole is opened at the end of the cylinder 15. The rod wall of the guide rod 19 is slidably set on the inner wall of the sliding hole. An air outlet is opened on the cylinder wall of the cylinder 15.

[0028] When the cooling fan 6 operates and increases the air pressure inside the housing 1, the airflow pushes the piston 17 inside the cylinder 15 to compress the spring 16. The sealing rubber ring 18 on the side wall of the piston 17 ensures airtightness. As the piston 17 moves, the guide rod 19 slides in the sliding hole at the end of the cylinder 15 to prevent the piston 17 from deviating. When the piston 17 moves to a certain position, it opens the air outlet on the cylinder wall of the cylinder 15, and the high-pressure gas inside the housing is discharged. After the air pressure decreases, the spring 16 returns to its original position and pushes the piston 17 to close the air outlet, maintaining the air pressure inside the housing and preventing external dust and debris from flowing back into the housing 1.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A variable frequency speed control device for heating, ventilation and air conditioning, comprising a box (1), an end cover (2) and a control module (3), characterized in that: The end cap (2) is placed on the upper surface of the box (1). The control module (3) is fixedly connected to the inner wall of the top of the end cap (2). The top of the control module (3) is electrically connected to a wire (4). The inner wall of the bottom of the box (1) is fixedly connected to a cooling fan (6). The inner wall of the bottom of the box (1) is fixedly connected to a fixing rod (8). Multiple heat dissipation fins (9) are fixedly sleeved on the rod wall of the fixing rod (8). The top of the multiple heat dissipation fins (9) is simultaneously fixedly connected to a heat dissipation copper plate (10). An air outlet is opened on the side wall of the box (1).

2. The variable frequency speed control device for a heating and ventilation fan according to claim 1, characterized in that: A connecting frame (5) is fixedly connected at the connection between the end cap (2) and the control module (3).

3. The variable frequency speed control device for a heating and ventilation fan according to claim 1, characterized in that: The bottom of the box (1) is fixedly connected to an anti-slip pad (7), and the inner wall of the heat dissipation fins (9) is provided with multiple ventilation holes, and the inner walls of the multiple ventilation holes are respectively set as arc surfaces.

4. The variable frequency speed control device for a heating and ventilation fan according to claim 1, characterized in that: The inner wall of the box (1) is provided with a cavity. The box (1) is provided with a sliding rod (11) on the inner wall of the cavity. A locking block (12) is fixedly connected to the rod wall of the sliding rod (11). The inner wall of the box (1) is provided with a locking groove. The locking block (12) is locked in the inner wall of the locking groove. The inner wall of the end cover (2) is rotatably connected with a rotating rod (14). The bottom end of the rotating rod (14) is fixedly connected to the top end of the sliding rod (11).

5. A variable frequency speed control device for a heating and ventilation fan according to claim 4, characterized in that: The box (1) is fixedly connected to the inner wall of the slot with an anti-slip pad (13), and the card block (12) is fitted to the inner wall of the anti-slip pad (13).

6. The variable frequency speed control device for a heating and ventilation fan according to claim 1, characterized in that: The box (1) is fixedly connected to the side wall of the air outlet with a cylinder (15). A spring (16) is fixedly connected to the inner wall of the cylinder (15). A piston (17) is fixedly connected to the end of the spring (16). A sealing rubber ring (18) is fixedly connected to the side wall of the piston (17). The sealing rubber ring (18) is fitted to the inner wall of the cylinder (15). A guide rod (19) is fixedly connected to the side wall of the piston (17). A sliding hole is opened at the end of the cylinder (15). The rod wall of the guide rod (19) is slidably set in the inner wall of the sliding hole. An air outlet is opened on the cylinder wall of the cylinder (15).

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