Centrifugal fan equipped with air cleaning device

Abstract

A centrifugal fan with air purification device, which belongs to an air purification and gas oil fume and particle separation and treatment device. The present application mainly solves the technical difficulties of the existing centrifugal fan, such as the inability to separate particles under the action of centrifugal force, the inability to clean oil stains, the wind body turbulence, and the water body disorderly splashing. The technical scheme of the present application is: comprising a fan shell and a fan wheel, wherein: it further comprises a separation box device composed of a coaming, a water stop plate and a separation box body, three coamings at the lower end of the fan shell are provided with two downward openings composed of a fan front plate and a fan rear plate, one of the openings is communicated with the fan shell and is arranged as a separation opening, and the other opening is connected with the other coaming end outside the middle coaming and is separated from the fan shell and is arranged as a box body, the separation box body is provided with a sewage seal at the bottom, the sewage seal of the separation box body corresponds to the box body, and the separation opening and the box body are arranged in the separation box body. The fan front plate is provided with a water stop plate, and the water stop plate is provided with an angular notch arranged in the opposite direction of the wind.

Description

TECHNICAL FIELD

[0001] The present application relates to a centrifugal fan equipped with an air purification device, which belongs to an air purification device for separating and treating oil fume and particulate matter in gas. BACKGROUND

[0002] In the prior art, a filter screen, cloth bag, electrostatic precipitator and other devices with adsorption and separation functions are installed at the outer end of a centrifugal fan to remove dust, oil fume gas and particulate matter in the air. The above method can be summarized as a mesh filtering technology. In this technology, particulate matter can also pass through the mesh when gas containing particulate matter passes through the mesh, resulting in filter leakage. In use, the mesh will be blocked and cannot be used. At the same time, this technology cannot achieve fine separation processing, and the finer the mesh, the more easily it will be blocked. In view of the above technical difficulties, patent technology ZL201621072230.x installs a centrifugal fan with a separation oil fume gas purification air device. The main structure of the fan is to install a separation box body below the existing centrifugal fan shell, so that the wind body forms a pressure reduction space at the separation box body. Due to the principle of gravitational acceleration, the particulate matter changes the fluid flow direction under the action of centrifugal force at the separation box body, so that the particulate matter is separated and collected. Thus, the traditional mesh filtering separation of particulate matter is changed. The combination of the centrifugal fan and the separation box body improves the structure and function of the centrifugal fan. The improved centrifugal fan has a qualitative change in separation precision, efficiency and convenience compared to the traditional method, and the technical method has a new breakthrough. However, some problems have also arisen.

[0003] Technical difficulty one, the distance between the bottom end of the separation box body and the volute tongue is large, the lower end of the volute tongue is mainly for exhaust air, and the uncontrolled wind body produces filter leakage. Technical difficulty two, the pressure difference generated by the fan wheel of the centrifugal fan leads to turbulent flow of the wind body in the fan shell, resulting in part of the water body splashing out of order. Patent ZL201621072230.x installs a centrifugal fan with a separation oil fume gas purification air device, which attempts to install a wind adjusting plate set between the volute tongue and the water film spray nozzle to solve the technical difficulties of wind body turbulence and water body splashing out of order. However, due to the small space between the fan wheel at the volute tongue of the fan shell and the fan shell coaming, the adjustment area of the wind adjusting plate set is small, the effect is limited, the technical adjustment sensitivity is high, the adjustment is difficult to determine, and it is difficult to eliminate water splashing. Regarding technical difficulty one, uncontrolled wind body filter leakage, patent ZL201811284526.1 installs a centrifugal force separation device for a centrifugal fan.

[0004] The present application solves the technical difficulties of wind body turbulence and water body splashing out of order. SUMMARY

[0005] The present application aims to solve the above technical difficulties and provide a centrifugal fan with air purification device, which can control the turbulence of air in the fan housing, eliminate water splashing and enhance the filtering efficiency.

[0006] To achieve the above object, the technical scheme provided by the embodiment of the present application is:

[0007] The centrifugal fan with air purification device comprises a centrifugal fan composed of a fan housing and a fan wheel, wherein it further comprises a separation box device composed of a fan housing composed of multiple surrounding plates, a separation box, a water stop plate and a sewage seal, three surrounding plates are arranged at the lower end of the fan housing, the three surrounding plates are provided with two downward openings with a spacing and are constructed with a front plate and a rear plate of the fan, one of the openings is communicated with the fan housing and is arranged as a separation opening, the other opening is connected with an intermediate surrounding plate and an outer surrounding plate and is separated from the fan housing and is arranged as a box body, the sewage seal is arranged at one end of the bottom of the separation box and corresponds to the box body, the separation opening corresponds to the other end of the separation box, the separation opening and the box body are placed in the bottom of the separation box, the end of the intermediate surrounding plate on one side of the box body is provided with a spacing from the bottom of the separation box, the water stop plate is arranged on the inner side of the lower edge of the air inlet of the front plate of the fan, the water stop plate is provided in a strip shape and one side is provided with an inclined surface to form an angular notch with the inner plane of the front plate of the fan, the angular notch is directed against the wind, one end of the angular notch is connected with the lower edge of the air inlet of the front plate of the fan, and the other end of the angular notch is placed in the separation box, the water stop plate is arranged on the inner side of the rear plate of the fan, the water stop plate is provided in a strip shape and one side is provided with an inclined surface to form an angular notch with the plane of the rear plate of the fan, the angular notch is directed against the wind, one end of the angular notch is directed upward, and the other end of the angular notch is placed in the separation box.

[0008] The centrifugal fan with air purification device further comprises a water film spraying device composed of a surrounding plate, an angular groove body, a water film spraying nozzle, a water film spraying nozzle outlet and a water inlet pipe, the angular groove body with an opening is formed by the plane connection of the end portions of two surrounding plates on the upper end of the center line on one side of the fan housing, the two planes of the surrounding plate of the angular groove body are respectively tangent to the outer side of the arc line of the fan housing and the opening is directed to the inner wall of the surrounding plate at the tangent position, the water film spraying nozzle is arranged in the angular groove body and one plane is connected with the water inlet pipe, the water film spraying nozzle outlet is directed to the inner wall of the surrounding plate, the length of the angular groove body is consistent with the thickness of the fan housing, and the length of the water film spraying nozzle outlet is adapted to the length of the angular groove body and the thickness of the fan wheel.

[0009] The centrifugal fan with air purification device further comprises a water separation group plate composed of an upper water separation plate and a lower water separation plate, the water separation group plate is arranged on the inner wall of the surrounding plate on the air outlet side of the fan housing, the upper water separation plate is provided with a horizontal baffle, the lower water separation plate is provided in a groove shape and forms a flat tube with the surrounding plate, the upper opening of the flat tube is provided with a spacing from the upper water separation plate and the lower opening is placed in the bottom of the separation box, and the width of the water separation group plate is consistent with the thickness of the fan housing.

[0010] The centrifugal fan equipped with an air purification device according to the present invention further includes an air regulating plate assembly composed of multiple air regulating plates, which is located at the separation port and the bottom of the separation box and is oriented in the direction of the wind.

[0011] The beneficial effects of this invention are as follows:

[0012] This invention, by adopting the aforementioned structural design, addresses the limitation of existing air-adjusting plate assemblies between the volute tongue and the water film nozzle. These assemblies suffer from insufficient clearance between the impeller and the surrounding plate, resulting in extremely limited air-adjusting power. Even if the adjustment is occasionally effective, it is difficult to replicate in production. Therefore, the air-adjusting plate assembly between the volute tongue and the water film nozzle has been eliminated, along with the separation plate. Consequently, the separation inlet and outlet design has been eliminated. The improved air-adjusting plate assembly, in a square shape, has an area several times larger than the original strip-shaped assembly, significantly increasing its adjustment and combing power. Because the separation outlet is located at the front of the volute tongue, the airflow returning after adjustment and combing is less turbulent, allowing the water film ejected from the water film nozzle to flow in an orderly manner. A water-stop plate is installed below the air inlet on the front panel of the blower, allowing splashing water from turbulent airflow to enter the angled groove of the water-stop plate and be guided to the bottom of the separation box. A water-stop plate is installed on the inner wall of the surrounding plate on the air outlet side of the blower housing. The water-distributing plate system ensures that the exhaust air containing water and particles is blown onto the lower water-distributing plate plane. The water, propelled by the airflow, rises along the lower water-distributing plate plane to the gap between the upper and lower water-distributing plates, entering the lower water-distributing plate's flat tube and flowing downwards to the bottom of the separation box. Similarly, the water and particles intercepted by the upper water-distributing plate also flow into the bottom of the separation box through the gap between the lower water-distributing plates. This creates a unique new interception, separation, and purification mode for water and particles in the separated gas, solving the technical challenge of splashing caused by disordered water flow. The addition of water-distributing plates to the front and rear plates of the fan, as well as the inner wall of the fan casing's outlet side panel, addresses the different characteristics of particles in different parts of the airflow within the fan casing, employing targeted technical solutions. Therefore, this invention, based on the existing separation box technology, enhances the separation effect by incorporating the above-mentioned technical solutions, effectively improving upon existing technical solutions and achieving unexpected technical results.

[0013] In the above-mentioned technical solution of the present invention, the wind regulating plate group is changed from a strip shape above the impeller to a square shape at the separation port, which significantly improves the adjustment effect, is easy to standardize and produce, and produces better social benefits.

[0014] This invention, together with the centrifugal fan equipped with a centrifugal force separation device (patent number ZL201811284526.1), forms a series of configurations for different particulate matter contents in the background air.

[0015] The application sets the separating box, the water stop plate, the air adjusting plate group and other separating particle devices in the centrifugal fan, changes the traditional filter screen mode, has simple structure, obvious effect and facilitates production; the solvent for separating particles and oil fume is added in the water body, so that the separating effect is easier, the odor removing agent is added, and the peculiar smell in the air can be removed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the structure schematic diagram of the water stop plate installed in the front plate of the fan.

[0017] Figure 2 is the A view of the water stop plate installed in the front plate of the fan.

[0018] Figure 3 is the structure schematic diagram of the water film spray nozzle installed.

[0019] Figure 4 is the structure schematic diagram of the air adjusting plate group installed.

[0020] Figure 5 is the structure schematic diagram of the water separating group plate installed in the outflow side of the fan shell.

[0021] Figure 6 is the structure schematic diagram of the water stop plate installed in the front plate and the rear plate of the fan shell.

[0022] Figure 7 is the structure schematic diagram of the water stop plate installed in the fan shell with the annular separating plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Embodiment 1:

[0024] As Figure 1 , Figure 2As shown, a centrifugal fan equipped with an air purification device in this embodiment includes a centrifugal fan consisting of a fan housing 1 and an impeller 8. It further includes a fan housing 1 consisting of a surrounding plate 2, a surrounding plate 7, and a surrounding plate 11; a separation box 16 consisting of a separation box 16, a water stop plate 14, and a sewage seal 12; and surrounding plates 2, 7, and 11, along with the fan front plate 3 and fan rear plate 4, have two downward-facing openings spaced apart at the lower end of the fan housing 1. One opening communicates with the inside of the fan housing 1 and is designated as a separation port 15. The other opening is a connection between one end of the surrounding plate 7 and the surrounding plate 11 and the fan housing 1. The separation box 16 is set as a box 10. One end of the bottom of the separation box 16 is provided with a sewage seal 12 and is corresponding to the box 10. The other end of the separation box 16 is corresponding to the separation port 15. The separation port 15 and the box 10 are placed together in the separation box 16. The end of the side panel 7 of the box 10 is spaced from the bottom of the separation box 16. A water stop plate 14 is provided on the inner side of the lower edge of the air inlet 9 of the fan front plate 3. The water stop plate 14 is strip-shaped and is obliquely set with the inner plane of the fan front plate 3 to form an angled groove. The angled groove faces the wind direction. One end of the angled groove is connected to the lower edge of the air inlet 9 of the fan front plate 3. The other end of the angled groove is placed into the separation box 16. Example 2:

[0025] like Figure 3 As shown, the centrifugal fan equipped with an air purification device in this embodiment is based on embodiment 1. It further includes a water film spraying device consisting of a surrounding plate 7, a surrounding plate 21, an angular trough 20, a water inlet pipe 17, a water film spray nozzle 18, and a water film spray nozzle outlet 19. An angular trough 20 with an opening is formed by the overlapping of the end planes of the surrounding plate 7 and the surrounding plate 21 on one side of the center line 5 of the fan housing 1. The two planes of the angular trough 20 overlap tangentially on the outside of the arc of the fan housing 1, and the opening faces the inner wall of the surrounding plate 21 at the tangent point. The water film spray nozzle 18 is disposed in the angular trough 20 and one plane is connected to the water inlet pipe 17. The water film spray nozzle outlet 19 faces the inner wall of the surrounding plate 21. The length of the angular trough 20 is consistent with the thickness of the fan housing 1, and the length of the water film spray nozzle outlet 19 and the angular trough 20 are adapted to the thickness of the impeller.

[0026] Implementation 3:

[0027] like Figure 4 As shown, the centrifugal fan equipped with an air purification device in this embodiment is based on embodiment 2, wherein: it further includes a water distribution plate, which is composed of an upper water distribution plate 23 and a lower water distribution plate 22. The water distribution plate is installed on the inner wall of the fan outlet side enclosure 2. The upper water distribution plate 23 is set as a horizontal baffle. The lower water distribution plate 22 is a groove-shaped body that forms a flat tube with the enclosure 2, and the upper opening is spaced from the upper water distribution plate 23. The lower opening is inserted into the bottom of the separation box 16. The width of the upper water distribution plate 23 and the lower water distribution plate 22 is the same as the thickness of the fan housing 1. Example 4:

[0028] As Figure 5 shown in the embodiment of the centrifugal fan with air purification device, on the basis of embodiment 3, wherein: it also includes the air regulating plate group 24 composed of multiple air regulating plates, the air regulating plate group 24 is arranged at the position of the separation port 15 and the bottom of the separation box body 16. Embodiment 5:

[0029] As Figure 6 shown in the embodiment of the centrifugal fan with air purification device, on the basis of embodiment 1, embodiment 2, embodiment 3, wherein: it also includes the water stop plate 25 arranged on the inner wall of the fan rear plate 4, the water stop plate 25 is strip-shaped and has an inclined surface, which forms an angular notch with the inner wall of the fan rear plate 4, the water stop plate 25 is arranged with one end upward and the other end into the bottom of the separation box body 16. Embodiment 6:

[0030] As Figure 7 shown in the embodiment of the centrifugal fan with air purification device, on the basis of embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, wherein: it also includes the water stop plate 14 arranged on the fan front plate 3 of the fan shell 1 with the ring-shaped separation plate 27, and the water stop plate 25 arranged on the fan rear plate 4, the ring-shaped separation plate 27 is arranged at the position where the volute tongue 5 extends downward along the arc to the volute tongue 26, the water stop plate 14 and the water stop plate 25 have the same structure, arrangement position and direction as those in the above embodiments.

Claims

1. A centrifugal fan equipped with an air purification device, comprising a centrifugal fan consisting of a fan casing and a fan impeller, characterized in that: It also comprises a fan shell composed of multiple surrounding plates, a separation box device composed of a separation box, a water stop plate, and a sewage seal, three surrounding plates at the lower end of the fan shell are provided with two downward openings with a spacing from the front plate and the rear plate of the fan, one of the openings is in communication with the inside of the fan shell and is used as a separation opening, the other opening is separated from the inside of the fan shell by the connection of the middle surrounding plate and the outer surrounding plate at one end and is used as a box, the sewage seal is provided at one end of the bottom of the separation box and corresponds to the box, the other end of the separation box corresponds to the separation opening, the separation opening and the box are placed together in the bottom of the separation box, the end of the middle surrounding plate on one side of the box is provided with a spacing from the bottom of the separation box, a water stop plate is provided inside the lower edge of the air inlet of the front plate of the fan, the water stop plate is provided in a strip shape and has an inclined surface which forms an angular notch with the inner plane of the front plate of the fan, the angular notch faces against the wind, one end of the angular notch is connected to the lower edge of the air inlet of the front plate of the fan, and the other end of the angular notch is placed in the separation box, a water stop plate is installed on the inner wall of the rear plate of the fan, the water stop plate is provided in a strip shape and has an inclined surface which forms an angular notch facing against the wind with the inner wall of the rear plate of the fan, one end of the water stop plate faces upward and the other end is placed in the separation box.

2. A centrifugal fan equipped with an air cleaning device according to claim 1, characterized in that: It also comprises a water film spraying device composed of surrounding plates, angular notches, water film spraying nozzles, water film spraying nozzle outlets, and water inlet pipes, an angular notch with an opening is formed by the overlapping of the end planes of two surrounding plates on one side of the center line of the fan shell at the upper end, the two planes of the surrounding plates of the angular notch are tangent to the outer side of the arc of the fan shell respectively and make the opening face the inner wall of the surrounding plate at the tangent position, the water film spraying nozzles are arranged in the angular notch and connected to the water inlet pipes through a plane, the water film spraying nozzle outlets face the inner wall of the surrounding plate, the length of the angular notch is consistent with the thickness of the fan shell, and the length of the water film spraying nozzle outlet is adapted to the length of the angular notch and the thickness of the fan wheel.

3. The centrifugal fan with an air cleaning device according to claim 1, characterized in that: It also comprises a water distribution group plate, which is composed of an upper water distribution plate and a lower water distribution plate, and is installed on the inner wall of the surrounding plate on the air outlet side of the fan shell, the upper water distribution plate is provided as a horizontal baffle, the lower water distribution plate is provided in a groove shape and forms a flat tube with the surrounding plate, the upper opening of the flat tube is provided with a spacing from the upper water distribution plate and the lower opening is placed in the bottom of the separation box, the width of the water distribution group plate is consistent with the thickness of the fan shell.

4. The centrifugal fan with an air cleaning device according to claim 1, characterized in that: It also comprises an air adjusting plate group composed of multiple air adjusting plates, which is arranged at the position of the separation opening and the bottom of the separation box and faces the wind.

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