FFU fan

Abstract

The utility model relates to the technical field of fans, in particular to an FFU fan which comprises a machine body and a filter, an air inlet is formed in the upper side face of the machine body, a protection assembly covers the air inlet, the protection assembly comprises a fixing cover, the fixing cover comprises a cylinder part and a circular truncated cone part, outer air inlets are formed in the circular truncated cone part at intervals in the circumferential direction of the circular truncated cone part, and the outer air inlets are communicated with the filter. A sealing cover which can ascend and descend and is matched with the circular truncated cone part is arranged in the fixing cover, an inner air inlet staggered with the outer air inlet is formed in the sealing cover, the sealing cover is attached to the circular truncated cone part and used for sealing the fixing cover, the circular truncated cone part is covered with a filtering cover, and a brushing and sweeping assembly used for brushing and sweeping the filtering cover is arranged outside the circular truncated cone part. By means of the structure, impurities such as fallen leaves in air entering the machine body from the air inlet are filtered and intercepted, and the situation that the fallen leaves enter the air inlet to cause blockage, and consequently the air outlet amount of the FFU fan is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an FFU fan. Background Art

[0002] The FFU fan is a terminal purification device that combines a fan and a filter (a high efficiency filter (HEPA) or an ultra high efficiency filter (ULPA)) to form its own powered terminal. More precisely, it is a modular terminal air supply device with its own power and filtering function.

[0003] For example, an FFU fan disclosed in patent number CN208885649U can realize a detachable connection between the box and the filter, and can conveniently disassemble the box and the filter, thereby facilitating the inspection and maintenance of the filter and the box, while not affecting the connection of the box and the filter as a whole during use. The operation is quick and convenient, and the practicability is strong. However, when this type of FFU fan is actually used, its air inlet is at the top without any protective measures, or a grille is simply set on the outside. Floating debris in the outdoor air (such as fallen leaves, etc.) will enter the air inlet of the FFU fan, causing the air inlet to be blocked, thereby reducing the filtration speed of the fan filter unit to the air, and causing the fan to have insufficient air volume, so it needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a FFU fan to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An FFU fan comprises a body and a filter. An air inlet is arranged on the upper side of the body. A protective assembly is arranged on the outer cover of the air inlet. The protective assembly comprises a fixed cover. The fixed cover comprises a cylindrical portion and a conical portion. External air inlets are arranged at intervals along the circumference of the conical portion. A sealing cover which can be raised and lowered and cooperates with the conical portion is arranged inside the fixed cover. An internal air inlet which is offset from the external air inlet is arranged on the sealing cover. The sealing cover is fitted with the conical portion to achieve sealing of the fixed cover. A filter cover is arranged on the outer cover of the conical portion. A brushing assembly for brushing the filter cover is arranged outside the conical portion.

[0007] Preferably, a mounting connecting plate is provided at the lower end of the sealing cover, a mounting ring frame is provided in the cylindrical portion, and a cylinder for driving the mounting connecting plate to lift the sealing cover is relatively provided on the mounting ring frame.

[0008] Preferably, a boss is provided on the upper end surface of the conical portion and at the center position, and a rotatable shaft is provided on the mounting ring frame through a motor and the upper end of the shaft extends through the boss. The brush sweeping assembly includes a mounting ring plate which is sleeved on the outer end of the shaft, and a brush rod is relatively provided on the side wall of the mounting ring plate. The brush rod is provided with a brush which is attached to the outer wall of the filter cover, and the rotation of the shaft is used to drive the brush to brush the filter cover.

[0009] Preferably, a sliding groove is provided on the outer wall of the extended end of the rotating shaft along its axial direction, a sliding block that extends into the corresponding sliding groove and slides is provided on the inner wall of the mounting ring plate, a spring for driving the mounting ring plate to move upward is provided on the outer sleeve of the extended end of the rotating shaft, and a nut for limiting the mounting ring plate on the rotating shaft is threadedly connected on the extended end of the rotating shaft.

[0010] Preferably, the shaft outer sleeve is provided with a baffle located between the mounting ring plate and the spring, and the baffle is evenly provided with universal bull's eye wheels matching the mounting ring plate.

[0011] Preferably, the outer side surface of the boss is provided with a thread groove along its circumference, the upper end portion of the filter cover is bent to form a lap ring portion overlapping the upper end surface of the truncated cone portion, and a blocking ring is threadedly connected in the thread groove to press against the lap ring portion.

[0012] Preferably, the lower end of the cylindrical portion extends outward to form a fixing portion, and the fixing portion is fixed to the upper side surface of the machine body by screws.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model, through the setting of the protective component, can filter and intercept impurities such as fallen leaves in the air entering the machine body through the air inlet, so as to prevent them from entering the air inlet and causing blockage, thereby affecting the air output of the FFU fan.

[0015] 2. The utility model drives the rotating shaft to rotate through the motor, drives the mounting ring frame to drive the brush rod so that the brush can brush and clean the outer side of the filter cover to avoid clogging of the filter cover and ensure its filtering effect on impurities such as fallen leaves in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an FFU fan in the utility model.

[0017] Figure 2 It is a cross-sectional schematic diagram of the protective component in the utility model.

[0018] Figure 3 It is a schematic diagram of a partial explosion structure between the fixed cover and the sealing cover in the utility model.

[0019] Figure 4It is a schematic diagram of a partial exploded structure of the brush sweeping assembly in the utility model.

[0020] The meanings of the numbers in the figure are as follows: 100, body; 101, housing; 110, filter; 120, protection assembly; 121, fixed cover; 122, filter cover; 201, overlapping ring portion; 202, limiting portion; 210, cylindrical portion; 211, fixed portion; 220, truncated cone portion; 221, boss; 231, mounting connecting plate; 240, mounting ring frame; 241, cylinder; 242, motor; 243, rotating shaft; 244, slideway; 250, mounting ring plate; 251, brush rod; 252, brush; 260, spring; 270, nut; 280, blocking ring;

[0021] 311, external air inlet; 321, internal air inlet; 331, thread groove;

[0022] 411. Slider; 421. Universal bull's eye wheel. DETAILED DESCRIPTION

[0023] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0024] The following is combined with Figure 1-Figure 4 This embodiment is described in further detail.

[0025] like Figure 1-3 As shown, an FFU fan in this embodiment includes a body 100 and a filter 110. The upper side of the body 100 is provided with an air inlet, and the outer cover of the air inlet is provided with a protective assembly 120. The protective assembly 120 includes a fixed cover 121. The fixed cover 121 includes a cylindrical portion 210 and a truncated cone portion 220. The truncated cone portion 220 is provided with external air inlets 311 at intervals along its circumference. A sealing cover 230 that can be raised and lowered and cooperates with the truncated cone portion 220 is provided in the fixed cover 121. The sealing cover 230 is provided with an internal air inlet 321 that is offset from the external air inlet 311. The sealing cover 230 is attached to the truncated cone portion 220 to achieve sealing of the fixed cover 121. The outer cover of the truncated cone portion 220 is provided with a filter cover 122, and the outside of the truncated cone portion 220 is provided with a brushing assembly for brushing the filter cover 122.

[0026] In this embodiment, the machine body 100 and the filter 110 are both of existing structures, and the structure disclosed in Patent No. CN208885649U can be adopted. The machine body 100 includes a housing 101 and a fan (not shown in the figure) arranged inside the housing 101. The upper side of the housing 101 is provided with an air inlet (not shown in the figure) corresponding to the fan. The filter 110 is installed at the lower side of the housing 101. When it is actually used, the fan works to suck outdoor air into the machine body 100 through the air inlet, and finally is discharged after being efficiently filtered by the filter 110, thereby realizing the delivery of clean air to the room.

[0027] Among them, by arranging the protection component 120 outside the air inlet, the protection component 120 can block the impurities mixed in the air entering the FFU fan, and preferably prevent impurities such as fallen leaves from entering the air inlet, causing the air inlet to be blocked, thereby affecting the air output of the FFU fan;

[0028] Among them, by setting the fixed cover 121 and the sealing cover 230, in actual use, the truncated cone portion 220 is truncated cone-shaped, and the sealing cover 230 is also truncated cone-shaped. The sealing cover 230 is raised and lowered in the fixed cover 121, so that its outer side surface can be fitted with the inner side surface of the truncated cone portion 220. Since the outer air inlet 311 and the inner air inlet 321 are arranged in a staggered manner, when the sealing cover 230 is moved up to fit the truncated cone portion 220, the outer air inlet 311 on the truncated cone portion 220 can be sealed. That is, the fixed cover 121 is in a sealed state, so that when the FFU fan is not working, the fixed cover 121 seals and protects the air inlet, which can better prevent external debris from entering and causing the air inlet to be blocked; when the sealing cover 230 descends in the fixed cover 121, the outer side of the sealing cover 230 can be separated from the inner side of the truncated cone part 220, that is, there is a gap between the two, so that the fixed cover 121 is opened, and the outside air can enter, so that the fixed cover 121 can be used normally;

[0029] In this embodiment, the fixed cover 121 is fixedly installed on the upper side of the housing 101 and covers the outside of the air inlet. In order to achieve the fixed installation of the fixed cover 121, the lower end of the cylindrical portion 210 extends outward to form a fixed portion 211, and the fixed portion 211 is fixed to the upper side of the housing 101 by screws. In this way, the fixed installation of the fixed cover 121 on the upper side of the body 100 is preferably achieved, that is, the protective component 120 is fixedly installed on the upper side of the body 100;

[0030] In actual use of this embodiment, the filter cover 122 is arranged outside the truncated cone portion 220, and can filter and block impurities (such as fallen leaves, etc.) in the air entering the fixed cover 121 from the external air inlet 311, that is, when the fixed cover 121 is working, it can filter and intercept the fallen leaves in the air entering the air inlet, thereby preferably preventing the fallen leaves and other impurities from entering the air inlet and causing blockage;

[0031] Among them, through the setting of the brushing component, the brushing component can brush the fallen leaves and the like that are filtered and intercepted on the filter cover 122 to prevent them from clogging the filter cover 122, thereby ensuring the filtering effect of the filter cover 122.

[0032] In this embodiment, a mounting plate 231 is provided at the lower end of the sealing cover 230, a mounting ring frame 240 is provided in the cylindrical portion 210, and a cylinder 241 is provided on the mounting ring frame 240 for driving the mounting plate 231 to lift the sealing cover 230.

[0033] In this embodiment, the mounting ring frame 240 is fixedly mounted in the cylindrical portion 210 by means of threads. The mounting connecting plate 231 is provided by means of a cylinder 241 and a mounting connecting plate 231, so that the mounting connecting plate 231 is connected to the sealing cover 230. The cylinder 241 is mounted on the lower side of the mounting ring frame 240, and can drive the mounting connecting plate 231 to move up and down, thereby driving the sealing cover 230 to move up and down in the fixed cover 121, that is, realizing the opening and closing of the fixed cover 121, which is convenient for its use.

[0034] The relatively arranged cylinders 241 can preferably drive the sealing cover 230 to stably rise and fall in the fixed cover 121 .

[0035] In this embodiment, a boss 221 is provided on the upper end surface of the conical portion 220 and at the center position. A rotatable shaft 243 is provided on the mounting ring frame 240 through a motor 242 and the upper end of the shaft 243 extends out. The brushing assembly includes a mounting ring plate 250 that is sleeved on the outer end of the extending end of the shaft 243. A brush rod 251 is relatively provided on the side wall of the mounting ring plate 250. The brush rod 251 is provided with a brush 252 that is attached to the outer wall of the filter cover 122. The rotation of the shaft 243 is used to drive the brush 252 to brush the filter cover 122.

[0036] In this embodiment, the motor 242 is arranged at the center of the lower side surface of the mounting ring frame 240, and is used to drive the rotating shaft 243 to rotate, wherein the upper end of the rotating shaft 243 penetrates the boss 221 and extends out, so that when the mounting ring plate 250 is fixedly connected to the rotating shaft 243, the rotating shaft 243 can drive its rotation to drive the brush rod 251 to rotate, and then drive the brush 252 to brush the outer side surface of the filter cover 122, preferably removing impurities such as fallen leaves that are blocked thereon, so as to ensure the filtering effect of the filter cover 122 on impurities such as fallen leaves;

[0037] In order to better realize the rotational installation of the rotating shaft 243 in the fixed cover 121, a bearing seat fixedly installed in the truncated cone portion 220 and located on the upper end surface is arranged outside the rotating shaft 243 located in the fixed cover 121, and a bearing rotatably connected to the rotating shaft 243 is arranged in the bearing seat, so that the rotational installation of the rotating shaft 243 in the fixed cover 121 is better realized;

[0038] The filter cover 122 is also in a truncated cone shape and is fitted on the outer surface of the truncated cone portion 220. In actual use, the upper end of the filter cover 122 is bent to form a lap ring portion 201 that overlaps the upper end surface of the truncated cone portion 220. The boss 221 extends out of the lap ring portion 201. The lower end of the filter cover 122 is bent to form a limit portion 202 that covers the outside of the cylindrical portion 210. The outer side surface of the boss 221 is provided with a thread groove 331 along its circumference. The thread groove 331 The internal thread is connected with a blocking ring 280 that presses against the lap ring portion 201. The blocking ring 280 is threadedly connected to the thread groove 331, so that the lap ring portion 201 can be squeezed and fixed on the upper end surface of the truncated cone portion 220, thereby realizing the fixed installation of the filter cover 122 on the outer side surface of the truncated cone portion 220; wherein, the limiting portion 202 is covered on the outside of the cylindrical portion 210, so that the filter cover 122 can be better limited, making its installation on the fixed cover 121 more stable.

[0039] Combination Figure 4 As shown, in this embodiment, a slide groove 244 is provided on the outer wall of the extended end of the rotating shaft 243 along its axial direction, and a slider 411 extending into the corresponding slide groove 244 and slidingly extending into the corresponding slide groove 244 is provided on the inner wall of the mounting ring plate 250. A spring 260 for driving the mounting ring plate 250 to move upward is provided on the outer sleeve of the extended end of the rotating shaft 243, and a nut 270 for limiting the mounting ring plate 250 on the rotating shaft 243 is threadedly connected on the extended end of the rotating shaft 243.

[0040] Through the structure of this embodiment, the slider 411 extends into the slide groove 244 to slide, and the key groove of the mounting ring plate 250 and the rotating shaft 243 is preferably matched, that is, the rotation of the rotating shaft 243 can drive the mounting ring plate 250 to rotate, so that the brush rod 251 drives the brush 252 to brush the filter cover 122;

[0041] Among them, through the arrangement of spring 260 and nut 270, the upper end of spring 260 abuts against the mounting ring plate 250, and the lower end abuts against the upper end surface of boss 221, thereby preferably driving the mounting ring plate 250 to move upward, and the nut 270 is threaded into the rotating shaft 243 to limit the mounting ring plate 250, so that the mounting ring plate 250 can be lifted and lowered on the rotating shaft 243, so that in actual use, the mounting ring plate 250 can be driven to rise and fall along the rotating shaft 243 by screwing the nut 270, and then the brush 252 can be adjusted to always fit the outer side surface of the filter cover 122, so that when the brush 252 is worn, the brush 252 can be driven to move downward to fit the outer side surface of the filter cover 122, so as to ensure the brushing effect of the brushing assembly.

[0042] In this embodiment, the rotating shaft 243 is provided with a baffle plate 420 between the mounting ring plate 250 and the spring 260 , and the baffle plate 420 is evenly provided with universal bull's eye wheels 421 that match the mounting ring plate 250 .

[0043] Through the structure in this embodiment, the spring 260 can drive the baffle plate 420 to fit the mounting ring plate 250, and the universal bull's eye wheel 421 can reduce the friction between the baffle plate 420 and the mounting ring plate 250, that is, reduce the resistance to the rotation of the mounting ring plate 250 driven by the rotating shaft 243 due to the squeezing of the mounting ring plate 250 by the spring 260, thereby facilitating the rotation of the mounting ring plate 250 driven by the rotating shaft 243.

[0044] Working principle: When the FFU fan stops working, the cylinder 241 drives the sealing cover 230 to move upward in the fixed cover 121, so that the sealing cover 230 fits the inner side of the truncated cone 220 to seal the fixed cover 121, thereby better preventing the air inlet from being blocked; when the protective component 120 is working, the filter cover 122 can filter and intercept impurities such as fallen leaves in the air entering the air inlet, thereby better preventing the air inlet from being blocked; when the filter cover 122 is blocked, the motor 242 drives the rotating shaft 243 to rotate, driving the brush 252 to brush the outer side of the filter cover 122, thereby better removing impurities such as fallen leaves attached to the outside of the filter cover 122, thereby ensuring the filtering effect of the filter cover 122.

[0045] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. An FFU fan, comprising a body (100) and a filter (110), wherein an air inlet is provided on the upper side of the body (100), and characterized in that: The air inlet outer cover is provided with a protective assembly (120), the protective assembly (120) comprising a fixed cover (121), the fixed cover (121) comprising a cylindrical portion (210) and a truncated cone portion (220), the truncated cone portion (220) being provided with external air inlets (311) at intervals along its circumference, a sealing cover (230) which can be raised and lowered and matched with the truncated cone portion (220) being provided inside the fixed cover (121), an internal air inlet (321) which is offset from the external air inlet (311) being provided on the sealing cover (230), the sealing cover (230) being fitted with the truncated cone portion (220) for achieving sealing of the fixed cover (121), a filter cover (122) being provided outside the truncated cone portion (220), and a brushing assembly for brushing the filter cover (122) being provided outside the truncated cone portion (220).

2. The FFU fan according to claim 1, characterized in that: A mounting connecting plate (231) is provided at the lower end of the sealing cover (230), a mounting ring frame (240) is provided inside the cylindrical portion (210), and a cylinder (241) is provided on the mounting ring frame (240) for driving the mounting connecting plate (231) to drive the sealing cover (230) to move up and down.

3. The FFU fan according to claim 2, characterized in that: A boss (221) is provided at the center of the upper end surface of the truncated cone portion (220); a rotating shaft (243) is rotatably provided on the mounting ring frame (240) through a motor (242) and the upper end of the rotating shaft (243) extends outward from the boss (221); the brushing assembly comprises a mounting ring plate (250) sleeved on the outer end of the extending end of the rotating shaft (243); a brush rod (251) is provided on the side wall of the mounting ring plate (250); a brush (252) is provided on the brush rod (251) and is attached to the outer wall of the filter cover (122); the rotating shaft (243) rotates to drive the brush (252) to brush the filter cover (122).

4. The FFU fan according to claim 3, characterized in that: A sliding groove (244) is provided on the outer side wall of the extended end of the rotating shaft (243) along its axial direction, and a sliding block (411) extending into the corresponding sliding groove (244) and sliding is provided on the inner side wall of the mounting ring plate (250). A spring (260) for driving the mounting ring plate (250) to move upward is provided on the outer sleeve of the extended end of the rotating shaft (243), and a nut (270) for limiting the mounting ring plate (250) on the rotating shaft (243) is threadedly connected on the extended end of the rotating shaft (243).

5. The FFU fan according to claim 4, characterized in that: The rotating shaft (243) is provided with a baffle plate (420) located between the mounting ring plate (250) and the spring (260) on its outer sleeve, and universal bull's eye wheels (421) matching with the mounting ring plate (250) are evenly distributed on the baffle plate (420).

6. The FFU fan according to claim 3, characterized in that: The outer side surface of the boss (221) is provided with a thread groove (331) along its circumference, and the upper end portion of the filter cover (122) is bent to form a lap ring portion (201) that overlaps the upper end surface of the truncated cone portion (220), and the thread groove (331) is internally threadedly connected to a blocking ring (280) that presses against the lap ring portion (201).

7. The FFU fan according to claim 1, characterized in that: The lower end of the cylindrical portion (210) extends outward to form a fixing portion (211), and the fixing portion (211) is fixed to the upper side surface of the machine body (100) by means of screws.

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