Energy-saving purification ventilation cabinet

Abstract

The invention discloses an energy-saving purification ventilation cabinet, and relates to the technical field of ventilation purification, the energy-saving purification ventilation cabinet comprises a ventilation cabinet, the top of the ventilation cabinet is communicated with an exhaust pipe, a fan is installed on the lower side in the exhaust pipe, a supporting rod is fixedly connected in the exhaust pipe, the supporting rod is rotatably connected with a fan, and the axis of the fan and the axis of the fan are fixedly connected with rotating rods; the end face of the rotating rod is provided with protrusions distributed in the circumferential direction. Energy (such as part of motor kinetic energy) possibly wasted during operation of the main fan originally is stored in a mechanical energy form through the elastic spring and then released after the main fan is stopped so as to drive the standby fan to operate at a slow speed, extra power input is not needed, energy reutilization to a certain degree is achieved, and the energy utilization rate is increased. Therefore, the basic ventilation or circulation function of the system can be maintained after the main fan is shut down, ventilation interruption is prevented, and the system is particularly suitable for transition or emergency scenes of purification systems with certain maintenance requirements for airflow or temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation and purification, and in particular to an energy-saving purification fume hood. Background Art

[0002] Cleanroom fume hoods are essential lab equipment used to control the spread of harmful gases and ensure operator safety. Their operating principle is typically to maintain clean laboratory air by driving air through the operating port through a fan and exhausting it through an internal purification system.

[0003] The laboratory environment has strict requirements on air quality, especially when dealing with harmful gases or volatile chemicals. To ensure the continuous purification and safety of the air in the laboratory, existing fume hoods mostly use continuous electricity to drive the fan operation. Especially when entering the standby state after the experiment, if the fan is still kept running, it will cause a large waste of energy; if the fan is turned off directly, it may cause the residual harmful gases in the cabinet to be unable to be discharged, affecting the safety of the experimental environment. To solve the above problems, some fume hoods use variable frequency control or low power consumption mode to reduce energy consumption, but still need to provide continuous electricity to drive the fan operation, and the energy saving effect is limited. At the same time, the existing equipment lacks an effective backup ventilation mechanism after the main fan is turned off, making it difficult to achieve a balance between safety and energy saving.

[0004] Therefore, it is urgent to propose an energy-saving purification fume hood that can reduce power consumption while ensuring ventilation effect and improve the intelligence and sustainability of the equipment. Summary of the Invention

[0005] In order to overcome the shortcomings of clean fume hoods, such as high energy consumption caused by the constant operation of the fan while ensuring laboratory safety, and the challenge of how to effectively prevent toxic gas residue and leakage in low air volume mode, the present invention provides an energy-saving clean fume hood.

[0006] An energy-saving purification fume hood includes a fume hood, the top of the fume hood is connected to an exhaust duct, a fan is installed on the lower side of the exhaust duct, a support rod is fixed in the exhaust duct, the support rod is rotatably connected to the fan, the axis of the fan and the fan are both fixedly connected to a rotating rod, the end face of the rotating rod is provided with circumferentially distributed protrusions, the end face of the protrusion is provided with a guide inclined surface, a spring box is fixed in the exhaust duct, an elastic spring is wound in the spring box, the spring box is rotatably connected to a rotating shaft, the elastic spring is fixed to the rotating shaft, both ends of the rotating shaft are fixedly connected to a turntable, the turntable is slidably connected to a magnetic baffle, a spring is fixed between the magnetic baffle and the adjacent turntable, the spring box is fixed to two electromagnets, and the electromagnet and the adjacent magnetic baffle are matched through magnetic force.

[0007] In a preferred embodiment of the present invention, the clockwork box is located between the blower and the fan.

[0008] In a preferred embodiment of the present invention, the magnetic barrier rod is slidably contacted with the adjacent rotating rod by the magnetic force, and the rotating rod drives the magnetic barrier rod to rotate through the protrusion thereon.

[0009] In a preferred embodiment of the present invention, a snap ring is further included. The snap ring is fixed to the turntable near the fan side. The clockwork box is slidably connected to the gear ring frame, and the gear ring frame is engaged with the snap ring.

[0010] In a preferred embodiment of the present invention, when the gear ring frame is engaged with the clasp, the gear ring frame restricts the clasp to rotate in one direction only toward the direction of storing force in the elastic spring.

[0011] In a preferred embodiment of the present invention, a magnetic frame is further included which is symmetrically distributed along the gear ring frame. The magnetic frame is fixed to a side of the gear ring frame away from the retaining ring. The magnetic frame cooperates with the adjacent electromagnet through magnetic force.

[0012] In a preferred embodiment of the present invention, the magnetic blocking rod and the magnetic frame cooperate with the magnetic force of the adjacent electromagnet through repulsive magnetic forces.

[0013] In a preferred embodiment of the present invention, an exhaust hood is further included, and the exhaust hood is fixedly connected to the rotating rod close to one side of the fan.

[0014] Compared with the existing technology, the present invention has the following advantages: the present invention stores the energy that may be wasted when the main fan is running (such as part of the motor kinetic energy) in the form of mechanical energy through an elastic spring, and releases it after the main fan is stopped to drive the backup fan to run at a slow speed. No additional power input is required, and a certain degree of energy recycling is achieved, thereby maintaining the basic ventilation or circulation function of the system after the main fan is stopped, preventing ventilation interruption, and is particularly suitable for transition or emergency scenarios of purification systems that have certain maintenance requirements for airflow or temperature.

[0015] The present invention realizes automatic switching between the main fan and the standby fan through the cooperation of the electromagnet and the spring, is easy to operate and does not require manual intervention, thereby improving the intelligence level of the system.

[0016] The present invention realizes the anti-return function through the cooperation of the gear ring frame and the retaining ring, preventing the elastic spring from fatigue failure due to repeated relaxation and tensioning, thereby improving its energy storage stability and service life; at the same time, flexible switching of energy release is achieved through electromagnetic control, ensuring reliable system operation and efficient energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the exhaust pipe, fan, support rod and other components of the present invention.

[0019] Figure 3It is a schematic diagram of the three-dimensional structure of the support rod, fan, rotating rod and other components of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the elastic spring, turntable, magnetic baffle and other components of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the mainspring box, elastic mainspring and rotating shaft of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the fan and the rotating rod of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the spring, electromagnet, retaining ring and other components of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the snap ring and the gear ring frame of the present invention.

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the fan, rotating rod, elastic spring, gear ring frame and exhaust cover of the present invention.

[0026] Among them, the above-mentioned drawings include the following figure marks: 1. fume hood, 2. exhaust duct, 3. fan, 4. support rod, 5. fan, 6. rotating rod, 601, guide slope, 7. spring box, 701, elastic spring, 702, rotating shaft, 8. turntable, 9, magnetic stop rod, 10. spring, 11. electromagnet, 12. retaining ring, 13. gear ring frame, 14. magnetic frame, 15. exhaust hood. DETAILED DESCRIPTION

[0027] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those skilled in the art will recognize that terms such as "above," "below," "upwardly," "downwardly," and the like are used to describe the drawings and are not intended to limit the scope of the present invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0028] Example 1: An energy-saving clean fume hood, such as Figures 1-6As shown, it includes a fume hood 1, the top of the fume hood 1 is connected to an exhaust duct 2, a fan 3 is installed on the lower side of the exhaust duct 2, a support rod 4 is fixedly connected to the exhaust duct 2, the support rod 4 is located above the fan 3, and a fan 5 is rotatably connected to the middle of the support rod 4. The axis of the fan 3 and the fan 5 are both fixedly connected to a rotating rod 6, and the end surfaces of the two rotating rods 6 that are close to each other are provided with circumferentially distributed protrusions, and the end surfaces of the protrusions are set as guide inclined surfaces 601. A spring box 7 is fixedly connected to the exhaust duct 2, and the spring box 7 is located between the fan 3 and the fan 5. An elastic spring 701 is wound in the spring box 7. The middle rotation of the clockwork box 7 is connected to the rotating shaft 702, the elastic clockwork 701 is fixed to the rotating shaft 702, and the upper and lower ends of the rotating shaft 702 are fixed to the turntable 8. The turntable 8 is connected to a magnetic baffle 9 that slides in the up and down directions. The magnetic baffle 9 slides and contacts the adjacent rotating rod 6 under the action of magnetic repulsion. The rotating rod 6 drives the magnetic baffle 9 to rotate through the protrusion thereon. A spring 10 is fixed between the magnetic baffle 9 and the adjacent turntable 8. The upper and lower sides of the clockwork box 7 are fixed with electromagnets 11, and the electromagnet 11 cooperates with the adjacent magnetic baffle 9 through repulsive magnetic forces.

[0029] During the experiment, the fume hood 1 uses electric energy to drive the main fan 3 on the lower side to start purification and ventilation normally, and at the same time stores energy through the elastic spring 701. When the main fan 3 is in standby mode, the energy of the elastic spring 701 is released, and the mechanical energy is used to drive the standby fan on the upper side to ventilate at a slow speed. In this way, the safety of the laboratory is guaranteed during standby mode, and energy conservation and environmental protection are also achieved. The specific operation is as follows:

[0030] During the experiment, the fume hood 1 is turned on, and the fan 3 on the lower side is controlled to be powered on and rotated, blowing the wind from the bottom to the top and discharging it from the exhaust pipe 2, thus achieving rapid ventilation and purification. The fan 3 on the lower side drives the rotating rod 6 on it to rotate synchronously, and at the same time controls the electromagnet 11 on the lower side to be energized, so that the magnetic baffle 9 on the lower side slides downward and contacts the upper end surface of the rotating rod 6 on the lower side. The spring 10 on the lower side is compressed, and thus the rotating rod 6 on the lower side drives the magnetic baffle 9 on the lower side to rotate through the protrusion thereon, thereby driving the turntable 8 on the lower side to rotate, and then driving the rotating shaft 702 to rotate, applying torque to the elastic spring 701, causing it to undergo elastic deformation. As the elastic spring 701 is further wound, its internal stress increases and is stored in the form of elastic potential energy. When the elastic spring 701 is deformed to the limit, the raised guide inclined surface 601 of the lower rotating rod 6 intermittently squeezes the magnetic baffle 9 on the lower side to jump up and down.

[0031] When the experiment is completed, the fan 3 on the lower side is controlled to be powered off and stop rotating, and the electromagnet 11 on the lower side is controlled to be powered off. The spring 10 on the lower side is reset to drive the magnetic barrier rod 9 on the lower side to slide upward and separate from the upper end surface of the lower rotating rod 6. At the same time, the electromagnet 11 on the upper side is controlled to be energized. The magnetic repulsion force causes the magnetic barrier rod 9 on the upper side to slide upward and contact the lower end surface of the upper rotating rod 6. The spring 10 on the upper side is compressed. At this time, the elastic spring 701 generates a reverse torque, slowly and steadily releasing the stored energy, thereby driving the rotating shaft 702 to reverse, and then driving the upper turntable 8 to reverse, and then through the upper magnetic barrier rod 9 to move the protrusion of the upper rotating rod 6, so that the upper rotating rod 6 drives the upper spare fan 5 to reverse. Since the upper fan 5 and the fan blades of the lower fan 3 are in opposite directions, although it is reversed, the wind is still blown from bottom to top, thus achieving slow ventilation and purification.

[0032] In summary, the present invention stores the energy that might be wasted when the main fan 3 is running (such as part of the motor kinetic energy) in the form of mechanical energy through a spring, and releases it after the main fan 3 is deactivated to drive the backup fan 5 to run at a slow speed. No additional power input is required, and a certain degree of energy recycling is achieved. This can maintain the basic ventilation or circulation function of the system after the main fan 3 is shut down, preventing ventilation interruption, and is particularly suitable for transition or emergency scenarios of purification systems that have certain maintenance requirements for airflow or temperature.

[0033] And through the cooperation of the electromagnet 11 and the spring 10, automatic switching between the main fan 3 and the backup fan 5 is achieved, which is easy to operate and does not require manual intervention, thereby improving the intelligence level of the system.

[0034] Example 2: Based on Example 1, Figure 7 and Figure 8 As shown, it also includes a snap ring 12, which is fixed to the turntable 8 on the lower side. The middle of the spring box 7 is slidably connected to a gear ring frame 13 in the up and down directions. The gear ring frame 13 is engaged with the snap ring 12. At this time, the gear ring frame 13 limits the snap ring 12 to only rotate in one direction in the direction of the elastic spring 701 storing power. The upper side of the gear ring frame 13 is fixed with a magnetic frame 14 symmetrically distributed along the left and right sides of the gear ring frame 13. The magnetic frame 14 cooperates with the adjacent electromagnet 11 through repulsive magnetic forces to drive the gear ring frame 13 to slide upward to release the meshing state of the gear ring frame 13 and the snap ring 12, thereby allowing the elastic spring 701 to release energy.

[0035] After the elastic spring 701 is deformed to the limit, each time the magnetic blocking rod 9 on the lower side jumps up and down after passing a protrusion, the elastic spring 701 must be relaxed and tightened (i.e., the process of tightening and releasing). Repeatedly doing this may cause material fatigue and elastic attenuation of the elastic spring 701, thereby affecting its energy storage efficiency. Therefore, the retaining ring 12 is restricted by the gear ring frame 13, so that the lower turntable 8 can only rotate forward and cannot reverse, so that the rotating shaft 702 cannot reverse, and then the elastic spring 701 cannot relax, which has a preventive effect. When the lower turntable 8 rotates forward, it drives the retaining ring 12 to rotate forward and squeezes the gear ring frame 13 to slide upward.

[0036] When the upper electromagnet 11 is energized, the upper electromagnet 11 pushes the magnetic frame 14 upward through magnetic repulsion, thereby pulling the gear ring frame 13 upward to disengage from the retaining ring 12, so as not to affect the energy release of the elastic spring 701.

[0037] Example 3: Based on Example 2, Figure 9 As shown, it also includes a conical exhaust cover 15, which is fixed to the rotating rod 6 on the side close to the fan 3, and disperses the wind discharged by the fan 3 along the outer side of the exhaust cover 15 to prevent the wind from accidentally pushing the magnetic frame 14 to move upward.

[0038] While the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that numerous other embodiments can be devised without departing from the scope of the invention. Accordingly, the scope of the present invention should be limited only by the claims appended hereto.

Claims

1. An energy-saving purification fume hood, comprising a fume hood (1), wherein the top of the fume hood (1) is connected to an exhaust pipe (2), a fan (3) is installed on the lower side of the exhaust pipe (2), a support rod (4) is fixedly connected to the exhaust pipe (2), and a fan (5) is rotatably connected to the support rod (4), wherein the fan (5) is characterized in that: The shafts of the blower (3) and the fan (5) are both fixedly connected to a rotating rod (6), the end surface of the rotating rod (6) is provided with a circumferentially distributed protrusion, and the end surface of the protrusion is provided with a guide inclined surface (601). A clockwork box (7) is fixedly connected in the exhaust pipe (2), an elastic clockwork spring (701) is wound in the clockwork box (7), the clockwork box (7) is rotatably connected to a rotating shaft (702), the elastic clockwork spring (701) is fixedly connected to the rotating shaft (702), both ends of the rotating shaft (702) are fixedly connected to a rotating disk (8), the rotating disk (8) is slidably connected to a magnetic blocking rod (9), a spring (10) is fixedly connected between the magnetic blocking rod (9) and the adjacent rotating disk (8), the clockwork box (7) is fixedly connected to two electromagnets (11), and the electromagnets (11) and the adjacent magnetic blocking rods (9) are matched through magnetic force.

2. An energy-saving clean fume hood according to claim 1, characterized in that: The clockwork box (7) is located between the blower (3) and the fan (5).

3. An energy-saving clean fume hood according to claim 2, characterized in that: The magnetic blocking rod (9) is slidably contacted with the adjacent rotating rod (6) by the action of magnetic force, and the rotating rod (6) drives the magnetic blocking rod (9) to rotate through the protrusion on the rotating rod (6).

4. An energy-saving clean fume hood according to claim 3, characterized in that: The invention also comprises a snap ring (12), which is fixed on a turntable (8) close to one side of the fan (3); the clockwork box (7) is slidably connected to a gear ring frame (13), and the gear ring frame (13) is engaged with the snap ring (12).

5. An energy-saving clean fume hood according to claim 4, characterized in that: When the gear ring frame (13) is engaged with the snap ring (12), the gear ring frame (13) limits the snap ring (12) to be able to rotate in one direction only in the direction of storing force of the elastic spring (701).

6. An energy-saving clean fume hood according to claim 5, characterized in that: The invention also comprises a magnetic frame (14) symmetrically distributed along the gear ring frame (13). The magnetic frame (14) is fixed to a side of the gear ring frame (13) away from the snap ring (12). The magnetic frame (14) cooperates with the adjacent electromagnet (11) through magnetic force.

7. An energy-saving clean fume hood according to claim 6, characterized in that: The magnetic blocking rod (9) and the magnetic frame (14) both cooperate with the adjacent electromagnet (11) through repulsive magnetic forces.

8. An energy-saving clean fume hood according to claim 7, characterized in that: The utility model also comprises an exhaust cover (15), which is fixedly connected to the rotating rod (6) on one side close to the fan (3).

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