Filter type negative pressure centrifugal blower

Abstract

The utility model relates to the field of fans, in particular to a filtering type negative pressure centrifugal blower which comprises an air bellow, an air draft assembly, a collecting box and a separating assembly. The air draft assembly used for providing power to extract air is installed in the air bellow, the collecting box used for recycling filtered waste materials is installed at the position, located at one end of the air draft assembly, in the air bellow, and the separating assembly used for separating paper scrap impurities and the like in the air is installed at the position, corresponding to the collecting box, of the top end of the air bellow. The separation assembly comprises a cyclone separator, one side of the outer portion of the cyclone separator is communicated with a first-stage air inlet pipe used for absorbing external air in a penetrating mode, the top end of the cyclone separator is communicated with a connecting pipe used for conveying separated air, and the bottom end of the cyclone separator is communicated with a waste discharging pipe used for discharging separated materials. The cyclone separator and the fan box body are integrated, the cyclone separator can effectively filter dust, and the collecting barrel of the cyclone separator has enough capacity, so that the filtering effect can be ensured, and blockage can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of fans, and in particular to a centrifugal blower with filter and negative pressure. Background Technology

[0002] A negative pressure centrifugal blower is a mechanical device that uses impeller rotation to generate negative pressure, thereby drawing in gas and delivering it. Its working principle is to use the centrifugal force generated by the high-speed rotation of the impeller to give the gas kinetic and pressure energy. Under the action of negative pressure, external gas is drawn into the blower, accelerated by the impeller and increased in pressure, and then transported to the designated location through pipelines.

[0003] Negative pressure fans often carry very fine impurities such as paper scraps and fibers, or a large amount of dust in their intake air. Traditional air filters are prone to clogging, affecting the performance of the fan. The current solution is to install a traditional air filter at the inlet, but if the filter element is too fine, it will easily clog and affect the performance of the fan, often not lasting more than a day. If the filter element is too coarse, the filtration effect cannot be guaranteed.

[0004] Therefore, in response to the existing problems of existing fans that use traditional air filters at the inlet but have poor filtration effects due to fine filter elements clogging easily or coarse ones, often failing to last even a day and affecting fan performance, a filter-equipped negative pressure centrifugal blower can be designed. This involves integrating the cyclone separator and the blower housing into one unit. The cyclone separator can effectively filter dust, and its collection bucket has a sufficiently large capacity, ensuring both filtration effectiveness and preventing clogging. Utility Model Content

[0005] To overcome the problem that existing fans, although equipped with traditional air filters at the import point, have filter elements that are easy to clog when fine and have poor filtration effect when coarse, often not lasting more than a day and affecting the performance of the fan.

[0006] The technical solution of this utility model is as follows: a filter-type negative pressure centrifugal blower, including a wind box, an exhaust assembly, a collection box, and a separation assembly; the exhaust assembly for providing power to extract air is installed inside the wind box, and a collection box for recovering filtered waste is installed at one end of the exhaust assembly inside the wind box; a separation assembly for separating paper scraps and impurities in the air is installed at the top of the wind box corresponding to the collection box; the separation assembly includes a cyclone separator, a primary air inlet pipe for absorbing external air is connected through one side of the cyclone separator, a connecting pipe for transmitting separated gas is connected to the top of the cyclone separator, and a waste discharge pipe for discharging separated material is connected to the bottom of the cyclone separator.

[0007] Preferably, during operation, the exhaust assembly is activated, generating negative pressure inside the air box. Under this negative pressure, external air is drawn into the cyclone separator through the primary air intake pipe. After entering the cyclone separator, due to its special structure and centrifugal force, heavier paper scraps and impurities are thrown against the inner wall of the cyclone separator and slide down along it. The relatively pure air after separation continues to be transported through the connecting pipe, while the separated waste is discharged downwards through the waste discharge pipe and finally falls into the collection box for recycling.

[0008] Preferably, a fixing plate is fitted at the bottom of the waste discharge pipe, and a retaining post for fixed connection is installed in a ring at the top of the fixing plate.

[0009] Preferably, an marking groove is provided on the outside of the bellows near one side edge, and a control panel is installed on the outside of the bellows below the marking groove, with a control knob installed on the outside of the control panel.

[0010] As a preferred option, a primary support column is fixedly installed at the four corners of the bottom of the bellows, a suction cup is installed at the bottom of the primary support column, and a rear baffle is installed at the rear end of the bellows.

[0011] Preferably, a side baffle is installed on one side of the bellows, and a secondary grid plate is installed through one side of the side baffle. A primary grid plate is installed inside the bellows on the side of the control panel, and two sets of fixing screws are symmetrically installed on the outside of the primary grid plate.

[0012] Preferably, the exhaust assembly includes a fan body, with an exhaust connection block and an impeller installed at both ends of the fan body. An exhaust pipe is connected to the top of the exhaust connection block, an intake connection block is installed on one side of the impeller, and a sealing connector is installed on one side of the intake connection block. Two sets of three-stage support columns are symmetrically installed at the bottom of the fan body. The three-stage support columns are L-shaped, and a base is installed at the bottom of the two sets of three-stage support columns.

[0013] As a preferred embodiment, multiple sets of secondary support columns are installed in a ring at the bottom of the collection box. Each secondary support column has a fixing plate installed at its bottom. Each fixing plate has a threaded fixing hole through its top. Multiple sets of buckles are installed in a ring near the top of the outside of the collection box.

[0014] The beneficial effects of this utility model are as follows: This device is equipped with a cyclone separator at the top of the air box. Through its special structure and working principle, it can effectively separate paper scraps and impurities in the intake air. Compared with the existing technology where the filter element is easy to clog and the filtration effect is poor, this solution can continuously and effectively separate and filter impurities for a long time without the need for frequent replacement or cleaning of filter components. At the same time, the collection box is used to recycle the filtered waste, ensuring that the separated impurities have a proper storage place. Attached Figure Description

[0015] Figure 1The diagram shown is a schematic representation of the overall structure of a filter-type negative pressure centrifugal blower according to this utility model.

[0016] Figure 2 The diagram shown is a schematic diagram of the exhaust component of a filter-type negative pressure centrifugal blower according to this utility model.

[0017] Figure 3 The diagram shown is a schematic representation of the separation component structure of a filter-type negative pressure centrifugal blower according to this utility model.

[0018] Figure 4 The diagram shown is a schematic of the collection box structure of a filter-type negative pressure centrifugal blower according to this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Bellows; 3. Collection box; 101. Identification slot; 102. Control panel; 103. Control knob; 104. Primary grille; 105. Fixing screw; 106. Rear baffle; 107. Side baffle; 108. Secondary grille; 109. Primary support column; 201. Tertiary support column; 202. Base; 203. Air outlet connection block; 204. Air outlet pipe; 205. Impeller; 206. Air inlet connection block; 207. Sealing connector; 208. Fan body; 301. Buckle; 302. Secondary support column; 401. Primary air inlet pipe; 402. Connecting pipe; 403. Waste discharge pipe; 404. Fixing plate; 405. Cyclone separator. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4This utility model provides an embodiment: a filter-type negative pressure centrifugal blower, including a wind box 1, an exhaust assembly, a collection box 3, and a separation assembly; the exhaust assembly for providing power to extract air is installed inside the wind box 1, and the collection box 3 for recovering filtered waste is installed at one end of the exhaust assembly inside the wind box 1; a separation assembly for separating paper scraps and impurities in the air is installed at the top of the wind box 1 corresponding to the collection box 3, and the separation assembly includes a cyclone separator 405, a primary air inlet pipe 401 for absorbing external air is connected through one side of the cyclone separator 405, and a connecting pipe 402 for transmitting separated gas is connected to the top of the cyclone separator 405. The bottom of 405 is connected to a waste discharge pipe 403 for discharging separated materials. During operation, the exhaust assembly is activated, generating negative pressure inside the air box 1. Under the action of negative pressure, external air is drawn into the cyclone separator 405 through the primary air inlet pipe 401. After the air enters the cyclone separator 405, due to the special structure of the cyclone separator 405 and the centrifugal force, the heavier paper scraps and impurities in the air are thrown towards the inner wall of the cyclone separator 405 by the centrifugal force and slide down along the inner wall. The relatively pure air after separation continues to be transmitted through the connecting pipe 402, while the separated waste is discharged downward through the waste discharge pipe 403 and finally falls into the collection box 3 for recycling.

[0022] Please see Figures 2-3 In this embodiment, a fixing plate 404 is fitted at the bottom of the waste discharge pipe 403, and a locking post for fixed connection is installed in a ring at the top of the fixing plate 404. The design of the fixing plate 404 and the locking post can ensure a more stable connection between the waste discharge pipe 403 and the waste receiving component below, reducing the risk of pipe detachment or displacement due to vibration or other factors during waste discharge. An identification groove 101 is provided on the outside of the air box 1 near one edge. A control panel 102 is installed on the outside of the air box 1 below the identification groove 101. A control knob 103 is installed on the outside of the control panel 102. The identification groove 101 can be used to mark relevant information of the air box 1, such as model, specifications, and operating precautions, so that users can quickly understand the basic situation of the air box 1 and improve the accuracy and safety of use. The setting of the control panel 102 and the control knob 103 allows users to directly adjust and control the operating parameters of the equipment outside the air box 1 without opening the inside of the air box 1, making operation more convenient and faster.

[0023] Please see Figures 3-4In this embodiment, a primary support column 109 is fixedly installed at the four corners of the bottom of the air box 1. A suction cup is installed at the bottom of the primary support column 109. A rear baffle 106 is installed at the rear end of the air box 1. The primary support column 109 at the four corners of the bottom of the air box 1 provides stable support for the air box 1, ensuring that the air box 1 remains stable during operation and will not shake or tilt, thereby ensuring the normal operation of the equipment. A side baffle 107 is installed on one side of the air box 1. A secondary grid plate 108 is installed through one side of the side baffle 107. A primary grid plate 104 is installed inside the air box 1 on one side of the control panel 102. Two sets of fixing screws 105 are symmetrically installed on the outside of the primary grid plate 104. The setting of the side baffle 107 makes the secondary grid plate 108 easy to disassemble and install, convenient for cleaning and replacement, and improves the maintainability of the equipment.

[0024] Please see Figures 3-4 In this embodiment, the exhaust assembly includes a fan body 208. An exhaust connection block 203 and an impeller 205 are respectively connected and installed at both ends of the fan body 208. An exhaust pipe 204 is connected to the top of the exhaust connection block 203. An intake connection block 206 is installed on one side of the impeller 205, and a sealing connector 207 is installed on one side of the intake connection block 206. Two sets of three-stage support columns 201 are symmetrically installed at the bottom of the fan body 208. The three-stage support columns 201 are L-shaped, and a base 202 is installed at the bottom of the two sets of three-stage support columns 201. The cooperation between the fan body 208 and the impeller 205 can generate powerful exhaust. The power source rapidly extracts air, improving work efficiency. The connection design between the air outlet pipe 204 and the air outlet connection block 203 ensures that the extracted gas is discharged evenly, reducing airflow turbulence. Multiple sets of secondary support columns 302 are installed in a ring at the bottom of the collection box 3. Each secondary support column 302 has a fixing plate at its bottom, and each fixing plate has a threaded fixing hole through its top. Multiple sets of buckles 301 are installed in a ring near the top of the outside of the collection box 3. The multiple sets of secondary support columns 302 and the fixing plates at the bottom provide stable support for the collection box 3, preventing it from easily shaking or tipping over during operation and ensuring the normal operation of the collection work.

[0025] When the equipment is started, the fan body 208 in the exhaust assembly begins to run, and the impeller 205 rotates rapidly to generate a strong negative pressure. At this time, under the action of negative pressure, the outside air is drawn into the cyclone separator 405 through the first-stage air inlet pipe 401 on the outside side of the cyclone separator 405. After the air enters the cyclone separator 405, due to the action of centrifugal force, heavier substances such as paper scraps and impurities in the air are thrown towards the inner wall of the cyclone separator 405 and slide down along the inner wall. The purer air after separation continues to be transported through the connecting pipe 402 at the top of the cyclone separator 405, while the separated waste is discharged downwards along the waste discharge pipe 403 at the bottom of the cyclone separator 405. The fixing plate 404 and the clamping post fitted at the bottom of the waste discharge pipe 403 ensure that the connection between the waste discharge pipe 403 and the collection box 3 below is stable, and the waste falls accurately into the collection box 3.

[0026] Through the above steps, during operation, the exhaust assembly is activated, generating negative pressure inside the air box 1. Under the action of negative pressure, external air is drawn into the cyclone separator 405 through the primary air intake pipe 401. After the air enters the cyclone separator 405, due to the special structure of the cyclone separator 405 and the action of centrifugal force, heavier paper scraps, impurities and other materials in the air are thrown towards the inner wall of the cyclone separator 405 by centrifugal force and slide down along the inner wall. The relatively pure air after separation continues to be transmitted through the connecting pipe 402, while the separated waste is discharged downward through the waste discharge pipe 403 and finally falls into the collection box 3 for recycling.

Claims

1. A negative pressure centrifugal fan with filter, comprising a bellows (1); characterized in that: Also include; air extraction assembly, collection box (3) and separation assembly; air bellow (1) inside installation of air extraction assembly for providing power extraction air, air bellow (1) inside installation of collection box (3) for recycling after filtering waste in one end of air extraction assembly, air bellow (1) top and collection box (3) corresponding installation of separation assembly for separating paper scraps impurities in air, separation assembly includes cyclone separator (405), cyclone separator (405) outside one side through communication has a first air inlet pipe (401) for absorbing external air, cyclone separator (405) top communication has a connecting pipe (402) for transmission of separated gas, cyclone separator (405) bottom communication has a waste pipe (403) for excluding separated material.

2. A filter-equipped negative pressure centrifugal blower according to claim 1, characterized in that: Waste pipe (403) bottom set with fixed disc (404), fixed disc (404) top ring installation for fixed connection of clamping column.

3. A filter-equipped negative pressure centrifugal blower according to claim 1, characterized in that: Air bellow (1) outside near one side edge place open mark slot (101), air bellow (1) outside installation of control panel (102) below mark slot (101), control panel (102) outside installation of control knob (103).

4. A filter-equipped negative pressure centrifugal blower according to claim 2, characterized in that: Air bellow (1) one side installation of side baffle (107), side baffle (107) one side through installation of secondary grating plate (108), air bellow (1) inside installation of primary grating plate (104) below control panel (102) one side, primary grating plate (104) outside symmetrical installation of two groups of fixed screws (105).

5. A filter-equipped negative pressure centrifugal blower according to claim 1, wherein: Air bellow (1) bottom four around corner fixed installation of primary support column (109), primary support column (109) bottom installation of suction cup, air bellow (1) rear end installation of back baffle (106).

6. A filter-equipped negative pressure centrifugal blower according to claim 1, wherein: Air extraction assembly includes fan body (208), fan body (208) two end side communication installation of air outlet connecting block (203) and impeller (205), air outlet connecting block (203) top communication has air outlet pipe (204), impeller (205) one side installation of air inlet connecting block (206), air inlet connecting block (206) one side installation of sealing connecting piece (207), fan body (208) bottom symmetrical installation of two groups of three level support column (201), three level support column (201) for L shape setting, two groups of three level support column (201) bottom installation of base (202).

7. A filter-equipped negative pressure centrifugal blower as defined in claim 1, wherein: Collection box (3) bottom ring installation of multiple groups of secondary support column (302), secondary support column (302) bottom installation of fixed plate, fixed plate top all through open thread fixing hole, collection box (3) outside near top ring installation of multiple groups of buckle (301).

Images