A fan filter unit and a purification system

Abstract

The present invention relates to the technical field of air purification, and discloses a fan filter unit and a purification system. The fan filter unit includes: a control unit, a fan, a chassis, a driving component, and a shielding component; the chassis has an air outlet, the fan is used to form an air flow, the air flow enters the chassis through the air outlet, and the shielding component is arranged at the air outlet; the control unit is used to control the opening and closing of the fan, and is used to control the driving component to drive the shielding component to avoid the air outlet when the fan is turned on, and control the driving component to drive the shielding component to shield the air outlet when the fan is turned off. The opening and closing of the shielding component are both automatically controlled by the control unit, without manual opening and closing of the air outlet, which is convenient and fast, and has a high degree of automation.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and particularly to a fan filter unit and a purification system. Background Art

[0002] A fan filter unit (English abbreviation: FFU) is a commonly used terminal device in a purification system. Its basic structure is box-shaped, with a built-in fan and a filter. The filter is generally placed at the air outlet. The fan sucks air from the top of the fan filter unit and sends the clean air into the clean room after passing through the filter. The fan filter unit is widely used due to its advantages of flexible layout and reduced machine room area.

[0003] In actual use, the fan filter units are generally arranged in multiple or group modes, and the control unit can control the on / off or variable frequency speed regulation of a single fan filter unit or a group of fan filter units. If a certain fan filter unit is turned off and other fan filter units are running, this fan filter unit will form an air flow channel. Under the pressure difference between the indoor and the static pressure box, the air flow will directly return to the static pressure box through the fan filter unit, resulting in a short circuit.

[0004] In existing small-area laboratories, after turning off the fan filter unit, the inlet is manually covered with a baffle. However, for large projects with tens of thousands of fan filter units, the workload of manual shielding is too large. Summary of the Invention

[0005] The present invention discloses a fan filter unit and a purification system, which are used to automatically shield or open the air outlet according to the working state of the fan, avoid short circuits, and improve work efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fan filter unit includes: a control unit, a fan, a chassis, a driving component, and a shielding component; the chassis has an air outlet, the fan is used to form an air flow, the air flow enters the chassis through the air outlet, and the shielding component is arranged at the air outlet; the control unit is used to control the opening and closing of the fan, and when the fan is turned on, it is used to control the driving component to drive the shielding component to avoid the air outlet, and when the fan is turned off, it is used to control the driving component to drive the shielding component to shield the air outlet.

[0008] In the above fan filter unit, the fan and the drive assembly are interlocked through the control unit. Only when the fan is turned on, the shielding component is allowed to avoid the air outlet to allow ventilation of the air outlet. Therefore, the fan can normally form an airflow entering from the air outlet to supply gas to the clean room; only when the fan is turned off, the shielding component is allowed to cover the air outlet to avoid a short circuit. The above process is automatically controlled by the control unit without manual opening and closing of the air outlet. It is convenient and fast with a high degree of automation.

[0009] Optionally, a surrounding wall connected to the chassis is provided around the air outlet, a protective plate is provided on the side of the surrounding wall facing away from the chassis, and the protective plate has ventilation holes corresponding to the air outlet; the shielding component is a shielding sheet, and when the shielding component covers the air outlet, the shielding sheet is laid flat on the protective plate.

[0010] Optionally, the driving assembly includes a driving motor and a reel, the driving motor is drivingly connected to the reel, and the axis of the reel is parallel to the protective plate; when one end of the shielding component is connected to the reel, and when the shielding component avoids the air outlet, the shielding component is wound around the reel.

[0011] Optionally, the driving motor is a tubular motor, and the driving motor is transmission-connected to the reel via a connector.

[0012] Optionally, one end of the shielding component is connected to the reel via a film clip.

[0013] Optionally, the surface of the shielding component facing the protective plate is provided with a positioning protrusion, and the surface of the protective plate facing the shielding component is provided with a positioning recess, and when the shielding component shields the air outlet, the positioning protrusion is located in the positioning recess.

[0014] Optionally, the positioning protrusion includes a first positioning rod and a second positioning rod parallel to each other, and the positioning recess includes a first positioning groove and a second positioning groove parallel to each other; the first positioning rod, the second positioning rod, the first positioning groove and the second positioning groove are all parallel to the axis of the scroll, and the first positioning groove and the second positioning groove are arranged on both sides of the ventilation hole; when the shielding component covers the air outlet, the first positioning rod is located in the first positioning groove, and the second positioning rod is located in the second positioning groove.

[0015] Optionally, the shielding component is provided with at least one pulley on the surface facing the protective plate, and the protective plate is provided with a sliding groove perpendicular to the axis of the reel and corresponding to the at least one pulley one by one, and each pulley fits in the corresponding sliding groove.

[0016] Optionally, the number of the sliding grooves is two, and the two sliding grooves are respectively arranged on both sides of the ventilation hole.

[0017] Optionally, a limit switch is provided at one end of the shielding member away from the reel, and the control unit is configured to control the driving assembly to stop driving the shielding member when the limit switch is triggered.

[0018] The present invention also discloses a purification system, which is used to automatically shield or open the air outlet according to the working state of the fan, avoid forming a short circuit, and improve the working efficiency.

[0019] A purification system includes the fan filter unit provided by any one of the above technical solutions.

[0020] The purification system has the same advantages as the above-mentioned fan filter unit over the prior art, and will not be described herein again. Description of the Drawings

[0021] Figure 1 is a side view of the fan filter unit provided by the embodiment of the present application;

[0022] Figure 2 is Figure 1 the view after rotating the view in the A direction in

[0023] Figure 3 is Figure 1 the view in the A direction after removing the shielding member in

[0024] Figure 4 is Figure 3 the sectional view in the B-B direction in

[0025] Figure 5 is Figure 3 the sectional view in the C-C direction in

[0026] Figure 6 is the control circuit diagram of the fan filter unit provided by the embodiment of the present application;

[0027] Figure 7 is Figure 6 the control diagram of each relay in Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Refer to Figures 1 to 7 :

[0030] The fan filter unit provided in the embodiment of the present application includes: a control unit G, a fan M1, a chassis 4, a drive component 3 and a shielding component 6; the chassis 4 has an air outlet, the fan M1 is used to form an airflow, the airflow enters the chassis 4 through the air outlet, and the shielding component 6 is arranged at the air outlet; the control unit G is used to control the opening and closing of the fan M1, and is used to control the drive component 3 to drive the shielding component 6 to avoid the air outlet when the fan M1 is turned on, and to control the drive component 3 to drive the shielding component 6 to shield the air outlet when the fan M1 is turned off.

[0031] In the above fan filter unit, the fan M1 and the drive assembly 3 are interlocked through the control unit G. Only when the fan M1 is turned on, the shielding component 6 is allowed to avoid the air outlet to ventilate the air outlet, so that the fan M1 can normally form an airflow entering from the air outlet to supply gas to the clean room; only when the fan M1 is turned off, the shielding component 6 is allowed to shield the air outlet to avoid a short circuit; the above process is automatically controlled by the control unit G, without the need for manual opening and closing of the air outlet, which is convenient and fast with a high degree of automation.

[0032] In a specific embodiment, a surrounding wall 10 connected to the chassis 4 is provided around the air outlet, and a protective plate 9 is provided on the side of the surrounding wall 10 away from the chassis 4, and the protective plate 9 has ventilation holes 91 corresponding to the air outlet; the shielding component 6 is a shielding sheet, and when the shielding component 6 shields the air outlet, the shielding sheet is laid flat on the protective plate 9, so that the protective plate 9 can support the shielding component 6 in the horizontal direction, and the surrounding wall 10 has a supporting effect on the protective plate 9 and a protective effect on the air outlet. The shielding sheet can be a hard PVC sheet or other materials with good air tightness.

[0033] In a specific embodiment, the driving assembly 3 includes a driving motor M2 and a reel 34, wherein the driving motor M2 is connected to the reel 34 in a transmission manner, and the axis of the reel 34 is parallel to the protective plate 9; when one end of the shielding component 6 is connected to the reel 34, and when the shielding component 6 avoids the air outlet, the shielding component 6 is wound around the reel 34, so that the shielding component can be wound and accommodated, which can save space. Among them, the axis of the reel 34 is parallel to the protective plate 9, so that the shielding component 6 can move in close contact with the protective plate 9.

[0034] In addition to this, the shielding component 6 may also be opened or closed by translation, or may be composed of louvers with adjustable angles. In short, any method may be used as long as the air outlet can be selectively shielded.

[0035] In a specific embodiment, the driving motor M2 is a tubular motor, which may be an AC motor. The driving motor M2 is connected to the reel 34 via a connector 32 to achieve a stable transmission connection.

[0036] In a specific embodiment, one end of the shielding member 6 is connected to the reel 34 through a clip 35, so as to be stably and detachably connected to the reel 34, which is beneficial to improving stability and facilitating replacement.

[0037] The driving assembly 3 may specifically further include a housing 39 and a protective cover 31. Among them, the protective cover 31 surrounds the driving motor M2 to protect the driving motor M2. The housing 39 surrounds the driving motor M2, the reel 34 and the connector 32 to physically protect the above components. A bracket 2 is also provided between the housing 39 and the chassis 4 to support the driving assembly 3 at a certain height, so that the reel 34 is higher than the protection plate 9, and the shielding member 6 can be smoothly wound and unwound to the protection plate 9. A filter 5 is provided at the outlet on the side of the chassis 4 away from the protection plate 9 to filter the air flow.

[0038] In a specific embodiment, the positioning protrusion includes a first positioning rod 36a and a second positioning rod 36b that are parallel to each other, and the positioning recess includes a first positioning groove 21a and a second positioning groove 21b that are parallel to each other; the first positioning rod 36a, the second positioning rod 36b, the first positioning groove 21a and the second positioning groove 21b are all parallel to the axis of the reel 34, so as to avoid the first positioning rod 36a and the second positioning rod 36b from being bent when the reel 34 winds up the shielding member 6. The first positioning groove 21a and the second positioning groove 21b are respectively arranged on both sides of the ventilation hole 91, so that both sides of the shielding member 6 located on both sides of the ventilation hole 91 can be positioned, the force is more balanced, and the shielding member 6 can be kept in close contact with the protection plate 9 to avoid air leakage; when the shielding member 6 shields the air outlet, the first positioning rod 36a is located in the first positioning groove 21a, and the second positioning rod 36b is located in the second positioning groove 21b. However, as long as the following conditions are met, the shielding member 6 and the protection plate 9 can also be combined to a certain extent to form a certain degree of seal: the surface of the shielding member 6 facing the protection plate 9 is provided with a positioning protrusion, and the surface of the protection plate 9 facing the shielding member 6 is provided with a positioning recess. When the shielding member 6 shields the air outlet, the positioning protrusion is located in the positioning recess.

[0039] In a specific embodiment, the number of the chutes 1 is two, and the two chutes 1 are respectively arranged on both sides of the ventilation hole 91, so that the shielding member 6 is stressed evenly and can stably slide and contact with the protection plate 9 during the process of being flattened or wound back, avoiding the shielding member 6 from deviating. Specifically, a traction piece 38 may be provided at one end of the shielding member 6 away from the reel 34, and a pulley 7 is respectively arranged at both ends of the traction piece 38 in the direction parallel to the axis of the reel 34. The traction piece 38 has a good supporting effect.

[0040] It should be understood that the setting manners of the pulley 7 and the chute 1 are not limited to the above forms. As long as the following conditions are met, the shielding member 6 can also be guided to a certain extent: at least one pulley 7 is provided on the surface of the shielding member 6 facing the protection plate 9, and a chute 1 perpendicular to the axis of the reel 34 and corresponding to at least one pulley 7 is provided on the surface of the protection plate 9 facing the shielding member 6, and each pulley 7 is fitted in the corresponding chute 1.

[0041] In a specific embodiment, a limit switch 8 is provided at one end of the shielding member 6 away from the drive assembly 3. When the shielding member 6 is fully deployed, the limit switch 8 is triggered, and the control unit G controls the drive assembly 3 to stop driving the shielding member 6, so as to shield the air outlet. Specifically, a structure such as a stop block for triggering with the limit switch 8 can be provided on the protection plate 9.

[0042] Reference Figure 6 and Figure 7 , taking the PLC as the control unit G to achieve logical control.

[0043] When the relay KA3 operates, the fan M1 runs. When the relay KA1 operates, the normally open contact closes, and the current in the M2 flows from left to right through the drive motor M2, and the drive motor M2 rotates forward to wind up the shielding member 6 by the reel 34; when M1 stops moving, the relay KA2 operates, the normally open contact closes, and the current in the drive motor M2 flows from right to left through the motor, and the drive motor M2 rotates in reverse to release the shielding member 6 by the reel 34.

[0044] Based on the same inventive concept, the embodiment of the present application also provides a purification system. The purification system includes the fan filter unit provided in the above embodiment.

[0045] In the above purification system, the fan M1 and the drive assembly 3 are interlocked by the control unit G. Only when the fan M1 is turned on, the shielding member 6 is allowed to avoid the air outlet so that the air outlet is ventilated. Thus, the fan M1 can normally form an air flow entering from the air outlet to supply gas to the clean room; only when the fan M1 is turned off, the shielding member 6 is allowed to shield the air outlet to avoid forming a short circuit; the above processes are all automatically controlled by the control unit G, without manually opening and closing the air outlet, which is convenient and fast and has a high degree of automation.

[0046] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A fan filter unit, characterized in that, include: Control unit, fan, chassis, drive assembly and shielding components; The chassis has an air outlet, the fan is used to form an airflow, the airflow enters the chassis through the air outlet, and the shielding component is arranged at the air outlet; The control unit is used to control the opening and closing of the fan, and is used to control the driving component to drive the shielding component to avoid the air outlet when the fan is turned on, and to control the driving component to drive the shielding component to shield the air outlet when the fan is turned off; A surrounding wall connected to the chassis is provided around the air outlet, a protective plate is provided on the side of the surrounding wall facing away from the chassis, and the protective plate has ventilation holes corresponding to the air outlet; The shielding component is a shielding sheet, and when the shielding component shields the air outlet, the shielding sheet is laid flat on the protective plate; The driving assembly comprises a driving motor and a reel, wherein the driving motor is drivingly connected to the reel, and the axis of the reel is parallel to the protective plate; When one end of the shielding component is connected to the reel, and when the shielding component avoids the air outlet, the shielding component is wound around the reel; The surface of the shielding component facing the protective plate is provided with a positioning protrusion, and the surface of the protective plate facing the shielding component is provided with a positioning recess, and when the shielding component shields the air outlet, the positioning protrusion is located in the positioning recess; The shielding component is provided with at least one pulley on the surface facing the protective plate, and the protective plate is provided with a sliding groove perpendicular to the axis of the reel and corresponding to the at least one pulley one by one, and each pulley is fitted in the corresponding sliding groove.

2. The fan filter unit according to claim 1, characterized in that The driving motor is a tubular motor, and the driving motor is transmission-connected to the reel via a connector.

3. The fan filter unit according to claim 2, characterized in that, One end of the shielding component is connected to the reel through a film clip.

4. The fan filter unit according to claim 1, characterized in that, The positioning protrusion includes a first positioning rod and a second positioning rod parallel to each other, and the positioning recess includes a first positioning groove and a second positioning groove parallel to each other; the first positioning rod, the second positioning rod, the first positioning groove and the second positioning groove are all parallel to the axis of the reel, and the first positioning groove and the second positioning groove are arranged on both sides of the ventilation hole; When the shielding component shields the air outlet, the first positioning rod is located in the first positioning groove, and the second positioning rod is located in the second positioning groove.

5. The fan filter unit according to claim 1, wherein, The number of the slide grooves is two, and the two slide grooves are arranged on both sides of the ventilation hole.

6. The fan filter unit according to claim 1, characterized in that, A limit switch is provided at one end of the shielding component away from the reel, and the control unit is used to control the driving assembly to stop driving the shielding component when the limit switch is triggered.

7. A purification system, characterized in that, The invention comprises the fan filter unit according to any one of claims 1 to 6.

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