CN218934853U

CN218934853U - Fan filter unit comprising surface wind speed uniformity control device

Info

Publication number: CN218934853U
Application number: CN202220364898.0U
Authority: CN
Inventors: 蒋乃军
Original assignee: Jiangsu Sujing Engineering Construction Co ltd
Current assignee: Jiangsu Sujing Engineering Construction Co ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2023-04-28
Anticipated expiration: 2032-02-18

Abstract

The utility model discloses a fan filter unit comprising a surface wind speed uniformity control device, which comprises a fan, a filter and a fan control device for controlling the rotating speed of the fan, wherein the fan control device comprises: the information acquisition device is positioned at the output end of the filter and used for detecting the wind speed; an information processing device connected with the information acquisition device; one end of the control executing device is connected with the information processing device, and the other end of the control executing device is electrically connected with the fan; the information acquisition device comprises a baffle plate arranged on the periphery of the output end of the filter, a linear guide rail mechanism horizontally arranged on the upper side of the baffle plate, a telescopic rod mechanism vertically arranged on the linear guide rail mechanism, an anemometer probe arranged at the tail end of the telescopic rod mechanism and an anemometer connected with the anemometer probe. The fan filter unit ensures the uniformity of the wind speed of the surface and realizes the mechanization and automation of the uniformity control of the wind speed of the FFU surface.

Description

Fan filter unit comprising surface wind speed uniformity control device

Technical Field

The utility model relates to the technical field of air cleaning, in particular to a fan filter unit comprising a surface air speed uniformity control device.

Background

The Fan Filter Unit (FFU) is air purifying equipment with an internal fan, mainly comprises a fan, a high-efficiency or ultra-high-efficiency air filter, has certain scale and standard specification, can be matched with a suspended ceiling framework for installation and can be connected and used in a modularized mode, and the FFU is widely applied in the air cleaning field due to the advantages of flexible overall design, convenient installation and construction, simple and effective sealing mode, easy control and the like, and can be used for terminal filtration before air enters a working area in a clean room, and also can be used for micro-environment or isolation working area with high cleaning requirements.

Testing of FFU performance is an important step in verifying, evaluating and improving FFU performance. Among the many test projects, face wind speed uniformity is one of the most important performance parameters, which directly affects the airflow composition of a clean room. At present, the surface wind speed uniformity test of FFU is carried out on an air supply section at a certain distance from an air outlet surface, the wind speed is tested point by dividing a grid to arrange measuring points, and finally the relative standard deviation of wind speed measured values of all measuring points is calculated to evaluate the surface wind speed uniformity.

In the prior art, the surface wind speed uniformity of FFU is tested by adopting a manual mode, and mechanical automation is not realized yet. The testers mostly measure each measuring point through a handheld anemometer probe, and the following problems exist in such measurement: on one hand, the number of the measuring points is large, the labor intensity is high, and the measuring efficiency is low; on the other hand, the measurement error introduced by personnel is large, including inaccurate measurement point division, uneven measurement time of each measurement point, easy fluctuation of the position of the handheld probe, large manual reading error, interference of personnel on convection and the like.

In summary, it is necessary to design a reliable and efficient control device for testing the uniformity of the wind speed of the FFU surface, so as to realize the control of the uniformity of the wind speed of the FFU surface.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a fan filter unit comprising a surface air speed uniformity control device, which can be controlled by a corresponding device, so that the surface air speed of the fan filter unit is ensured to have good uniformity, and the air flow composition of a clean space is ensured.

To achieve the above objects and other advantages and in accordance with the purpose of the utility model, there is provided a fan filter unit including a surface wind speed uniformity control device including a fan, a filter, and a fan control device controlling a rotation speed of the fan, the fan control device including:

the information acquisition device is positioned at the output end of the filter and used for detecting the wind speed;

the information processing device is used for processing and converting the signals collected by the information acquisition device and is connected with the information acquisition device;

the control execution device is used for controlling the operation of the fan to be connected with the information processing device at one end according to the information obtained after the information processing device is used for processing, and the other end of the control execution device is electrically connected with the fan;

the information acquisition device comprises a baffle plate arranged on the periphery of the output end of the filter, a linear guide rail mechanism horizontally arranged on the upper side of the baffle plate, a telescopic rod mechanism vertically arranged on the linear guide rail mechanism, an anemometer probe arranged at the tail end of the telescopic rod mechanism and an anemometer connected with the anemometer probe.

Preferably, the anemometer is a pressure sensor.

Preferably, the baffle consists of an upper baffle, a lower baffle, a left baffle and a right baffle, wherein the upper baffle is provided with a slotted hole, the central line of the slotted hole is positioned on a plane wind speed uniformity measuring plane, and the distance between the measuring plane and the filter is 150mm.

Preferably, the linear guide rail mechanism is used for horizontal movement of the anemometer and comprises a linear guide rail driving motor, a ball screw linear guide rail and a sliding block; the sliding block is driven by the linear guide rail driving motor to reciprocate along the linear guide rail of the ball screw.

Preferably, the telescopic rod mechanism is used for controlling the vertical movement of the anemometer and comprises a telescopic rod driving motor and a telescopic rod; the length of the telescopic rod is changed under the driving of the telescopic rod driving motor.

Preferably, the central line of the telescopic rod is positioned on the measuring surface and perpendicularly intersects with the central line of the slot hole of the baffle plate, the diameter of the telescopic rod is smaller than the width of the slot hole, and when the sliding block moves along the guide rail, the telescopic rod can freely move in the slot hole.

Preferably, the anemometer probe is mounted at the end of the telescopic rod, and the anemometer probe is coaxial with the central line of the telescopic rod.

Preferably, the information processing device is a differential pressure transmitter.

Preferably, the control execution device is a PLC controller.

Preferably, the fan control device further comprises an alarm device electrically connected with the differential pressure transmitter, and the alarm device is an audible and visual alarm or a buzzer alarm.

Compared with the prior art, the utility model has the beneficial effects that:

the fan filter unit is provided with the surface wind speed uniformity control device, so that mechanization and automation of FFU surface wind speed uniformity control are realized, the operation is convenient and simple, compared with the traditional method for manually testing the surface wind speed uniformity, the labor intensity of a tester is greatly reduced, the testing efficiency is remarkably improved, in addition, after the testing, the surface wind speed uniformity of the fan filter unit is timely adjusted, and the uniformity of air flow composition in a purifying space is ensured.

Drawings

FIG. 1 is a schematic diagram of a blower filter assembly including a face wind speed uniformity control apparatus in accordance with the present utility model;

in the figure: 1. a filter opening; 2. a baffle; 3. an information processing device; 4. control the executive device; 5. a linear guide rail driving motor; 6. a ball screw linear guide rail; 7. a slide block; 8. a telescopic rod driving motor; 9. a telescopic rod; 10. an anemometer probe; 11. anemometer

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present utility model will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a device for practicing the utility model. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the top-to-bottom dimension, "width" corresponds to the left-to-right dimension, and "depth" corresponds to the front-to-back dimension. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms (e.g., "connected" and "attached") referring to an attachment, coupling, etc., refer to a relationship wherein these structures are directly or indirectly secured or attached to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

Example 1

Referring to fig. 1, this embodiment provides a fan filter unit including a surface wind speed uniformity control device, including a fan, a filter, and a fan control device for controlling a rotation speed of the fan, the fan control device including:

the information processing device 3 is used for processing and converting the signals collected by the information acquisition device and is connected with the information acquisition device;

a control execution device 4 for controlling the operation of the fan according to the information obtained after the processing of the information processing device 3 and connected with the information processing device 3 at one end, and the other end of the control execution device 4 is electrically connected with the fan;

the information acquisition device comprises a baffle plate 2 arranged at the periphery of the output end of the filter and the opening 1 of the filter, a linear guide rail mechanism horizontally arranged at the upper side of the baffle plate, a telescopic rod mechanism vertically arranged on the linear guide rail mechanism, an anemometer probe 10 arranged at the tail end of the telescopic rod mechanism, and an anemometer 11 connected with the anemometer probe, wherein the anemometer 11 is a pressure sensor, and can rapidly realize the measurement of wind speed through pressure sensing.

In this embodiment, the filter opening 1 internally connects the filter with a fan for outputting wind through the opening.

The baffle 2 is arranged around the filtering opening 1 and used for blocking the influence of the external environment (external air flow) on the air flow supplied by the fan, the baffle 2 is composed of an upper baffle, a lower baffle, a left baffle and a right baffle, wherein a slotted hole is formed in the upper baffle, the central line of the slotted hole is positioned on a surface air speed uniformity measuring surface, and the distance between the measuring surface and an air outlet surface, namely the filtering opening 1 is 150mm. In this embodiment, the baffle is made of organic glass material, so that the actual measurement condition of the wind speed of the surface can be conveniently observed.

The linear guide rail mechanism is horizontally arranged on the upper side of the upper baffle plate and used for realizing the movement of the anemometer probe 10 in the horizontal direction, the linear guide rail mechanism comprises a linear guide rail driving motor 5, a ball screw linear guide rail 6 and a sliding block 7. The sliding block 7 can reciprocate along the guide rail 6 under the driving of the motor 5, the stroke of the sliding block 7 is within the length range of the slotted hole of the baffle plate 2, and the anemometer probe 10 is prevented from being damaged due to collision with the baffle plates 3 on two sides under the condition of fault or misoperation. In this embodiment, the linear guide driving motor 5 is a stepping motor.

The telescopic rod mechanism is vertically arranged on a sliding block 7 of the linear guide rail mechanism and used for enabling an anemometer probe 10 to move in the vertical direction, and comprises a telescopic rod driving motor 8 and a telescopic rod 9. The telescopic rod 9 can change its length under the drive of the motor 8, the centre line of the telescopic rod 9 is located on the plane wind speed uniformity measuring plane and perpendicularly intersects with the slot centre line of the baffle plate 2, the diameter of the telescopic rod 9 is slightly smaller than the slot width, when the slide block 7 moves along the guide rail 6, the telescopic rod 9 with the diameter slightly smaller than the slot width can freely move in the slot, in this embodiment, the telescopic rod driving motor 8 adopts a linear motor.

An anemometer probe 10 is mounted at the end of the telescopic rod 9 for measuring the wind speed value at each measuring point. The central line of the anemometer probe 10 is coaxial with the central line of the telescopic rod 9 so as to ensure that the center of the anemometer probe 10 is positioned on a plane wind speed uniformity measuring plane.

The anemometer 11 is mounted on the left side of the filter opening 1 and is electrically connected with the anemometer probe 10 for receiving pressure sensing data of the anemometer probe.

In this embodiment, the information processing device 3 is a differential pressure transmitter. The differential pressure transmitter processes and converts pressure data acquired by the anemometer into an electric signal, so that the electric signal is converted into a wind speed value.

In this embodiment, the control execution device 4 is a PLC controller. The PLC controller judges the wind speed by receiving the electric signals of the information processing device 3, controls the rotating speeds of a plurality of fans in the fan, controls the fans in the fan to increase or decrease the rotating speeds, and always keeps the air quantity passing through the filter consistent.

The fan filter unit disclosed by the utility model is provided with the fan control device for monitoring the air outlet surface in real time and controlling the air quantity, the air speed of the fan is adjusted in real time according to the change of the air speed of the air outlet surface, the detection error and the time interval generated during manual detection are avoided, the air quality of a clean room is ensured, the whole process is electrically controlled, the manual operation is not needed, the workload is reduced, and the cost is reduced. The fan filter unit realizes the mechanization and automation of FFU surface wind speed uniformity control,

in some preferred embodiments, the fan control apparatus further comprises an alarm device electrically connected to the differential pressure transmitter, wherein the alarm device is an audible and visual alarm or a buzzer alarm, and is used for detecting whether the filter is blocked. When the filtration resistance reaches the highest, i.e. the anemometer probe 10 cannot detect pressure, the alarm device sends a signal to prompt the user to replace the filter in time.

The number of equipment and the scale of processing described herein are intended to simplify the description of the present utility model. Applications, modifications and variations of the present utility model will be readily apparent to those skilled in the art.

Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. The utility model provides a fan filter unit including face wind speed uniformity control device, its characterized in that includes fan, filter and control fan rotational speed's fan controlling means, fan controlling means includes:

the control execution device is used for controlling one end of the fan to run and connected with the information processing device according to the information obtained after the information processing device is used for processing, and the other end of the control execution device is electrically connected with the fan;

the information acquisition device comprises a baffle plate arranged at the periphery of the output end of the filter, a linear guide rail mechanism horizontally arranged at the upper side of the baffle plate, a telescopic rod mechanism vertically arranged on the linear guide rail mechanism, an anemometer probe arranged at the tail end of the telescopic rod mechanism and an anemometer connected with the anemometer probe.

2. The blower filter set including a face wind speed uniformity control device of claim 1, wherein the anemometer is a pressure sensor.

3. The fan filter unit comprising the surface air speed uniformity control device according to claim 1, wherein the baffle plate is composed of an upper baffle plate, a lower baffle plate, a left baffle plate and a right baffle plate, wherein the upper baffle plate is provided with a slotted hole, the central line of the slotted hole is positioned on a surface air speed uniformity measurement surface, and the distance between the measurement surface and the filter is 150mm.

4. The fan filter unit comprising a surface wind speed uniformity control apparatus according to claim 3, wherein the linear guide mechanism is used for horizontal movement of the anemometer, and comprises a linear guide driving motor, a ball screw linear guide and a slider; the sliding block is driven by the linear guide rail driving motor to reciprocate along the linear guide rail of the ball screw.

5. The fan filter assembly including a face wind speed uniformity control apparatus according to claim 4, wherein said telescoping rod mechanism is for controlling vertical movement of said anemometer, including a telescoping rod drive motor and a telescoping rod; the length of the telescopic rod is changed under the driving of the telescopic rod driving motor.

6. The fan filter assembly including a face wind speed uniformity control apparatus according to claim 5, wherein said telescoping rod centerline is located on said measuring face and perpendicularly intersects said measuring face and said baffle slot centerline, said telescoping rod diameter being smaller than the slot width, and wherein said telescoping rod is free to move within said slot as said slider moves along said guide rail.

7. The blower filter set including a face wind speed uniformity control device according to claim 6, wherein said anemometer probe is mounted to an end of said telescoping rod, said anemometer probe being coaxial with said telescoping rod centerline.

8. The blower filter set including a face wind speed uniformity control device according to claim 1, wherein said information processing device is a differential pressure transmitter.

9. The fan filter assembly including a face wind speed uniformity control apparatus of claim 1, wherein said control actuator is a PLC controller.

10. The fan filter unit comprising a face wind speed uniformity control device according to claim 8, wherein the fan control device further comprises an alarm device electrically connected with the differential pressure transmitter, and the alarm device is an audible and visual alarm or a buzzer alarm.