CN104014204A - Air purifier of high-efficient silence - Google Patents

Abstract

An efficient and silent air purifier comprises a main body shell, a top machine shell and a bottom machine shell which are respectively connected to the top and the bottom of the main body shell, and a central splitter plate, a side air guide plate, a second filter screen, a gas filter screen, a fan box, a honeycomb rectifying plate and a first filter screen which are sequentially connected into the main body shell from top to bottom; the second filter screen, the gas filter screen, the fan box, the honeycomb rectifying plate and the first filter screen form an integral airtight structure; the central splitter plate is fixedly connected to the inner wall of the top casing, and the central splitter plate and the side air guide plates connected to the inner side wall of the main casing form an air outlet channel with a V-shaped section, so that vertical air flow is guided into parallel air flow and is split and discharged. The invention adopts the longitudinal framework from top to bottom in the aspect of the whole structure, so that the whole air purifier occupies less area and has compact structure; it can effectively reduce noise and simultaneously can keep high amount of wind and high filtration efficiency through the structural design of multiple wind-guiding, rectification and noise reduction.

Description

Efficient and quiet air purifier

technical field

The invention relates to an air purifier, in particular to an efficient and quiet air purifier.

Background technique

With the development of industrialization, environmental pollution is becoming more and more serious, especially air pollution. The large-scale control of pollution is mainly manifested in smog and photochemical smog caused by air dust and particulate matter; over-industrialization makes more people face more serious problems. Too much air pollution, too much dust, fine particles, and external pollution sources erode and pollute our activity space and indoor air.

In order to meet the needs of modern home environment or office air environment purification, air purifiers have emerged as the times require, which can filter polluted air and bring clean and fresh air environment to optimize our living and working space.

Air purifiers refer to products that can absorb, decompose or transform various pollutants in the air and effectively improve the cleanliness of indoor air; currently the most representative air purifiers are passive air purifiers, which are mainly composed of It is composed of motor, fan, air filter and other systems. Its working principle is: the motor and fan in the machine circulate the indoor air, and the polluted air passes through the air filter in the machine to remove or absorb various pollutants. The air purifier of the model will also install a negative ion generator at the air outlet to achieve a better purification effect. However, the current air purifiers also have some disadvantages. For example, most of them adopt the structural design of side air inlet and outlet, which makes the overall machine structure length larger, which is not conducive to placement and affects the purification efficiency; in addition, the use of high-speed fans makes the air purifier run. The noise is loud and affects the use.

In order to reduce the operating noise of the air purifier, some air purifiers use a low-speed axial fan or a low-speed forward centrifugal fan. However, since most air purifiers use low-speed and low-pressure fans, the purification efficiency is reduced, and some first filter screens with very low wind resistance are required in actual design. However, the first filter screen can only filter some coarse particles, and the PM0.3 or below particles that are most harmful to the human body have little filtering effect.

Due to the design of the internal structure, the air flow is sluggish or unscientific. After long-term use, this type of air purifier has accumulated a large amount of dust and fine harmful particles adsorbed during the filtration process, which itself has become a source of pollution; these are Most of the air purifiers on the market have deficiencies.

Contents of the invention

The purpose of the present invention is to provide an efficient and quiet air cleaner, which has the advantages of high filtration efficiency, low noise, and compact, scientific and firm structure.

The present invention is realized in such a way that it includes a main body shell and a top shell and a bottom shell respectively connected to the top and bottom of the main shell. plate, side wind deflector, second filter screen, gaseous filter screen, wind box, honeycomb rectifying plate and first filter screen; Constitute an integral airtight structure;

The central splitter plate is fixedly connected to the inner wall of the top casing, and the central splitter plate and the side wind deflectors connected to the inner wall of the main body shell form a V-shaped air outlet channel, which guides the vertical air flow into a parallel The air flow is split and discharged; the central splitter plate and the side air deflector are made of EPP material. In addition to EPP material, other materials that meet the above conditions such as EPU, glass fiber cotton with composite protective surface, and materials with micro-pore structure Such as diatom board and so on.

The bottom casing is provided with several air inlets, and a bottom casing sound insulation board is arranged between the inner wall of the air inlet and the inner wall of the main body shell; the air inlet is in the shape of a circle, an oval, a square or a rectangle, etc. The number of air outlets is 1 to 6.

The fan box is located in the middle of the main body shell, and the centrifugal fan is fixed in the fan box through the fan fixing frame; the top of the fan box is provided with a fan box outlet protection net, and the fan box wind deflector located below the fan box outlet protection net It is fixedly connected to the inner wall of the fan fixing frame.

A preferred structure is: the second filter net and the first filter net are respectively fixed by the second filter net locking mechanism and the first filter net locking mechanism located on the inner wall of the main body shell.

The preferred structure is: airtight rubber edges are provided on the periphery between the second filter screen and the gas filter screen and between the gas filter screen and the wind box outlet protection screen, which are compressed by the second filter screen locking mechanism .

The preferred structure is: a vibration-absorbing assembly is arranged between the centrifugal fan and the fan fixing frame.

The preferred structure is: the air inlet of the fan box is trumpet-shaped, and the cross-sectional area of the smallest diameter of the air inlet of the fan box (3) is 0.7-1.7 times the total area of the air inlet (18).

The preferred structure is: the honeycomb rectifying plate is fixed by a honeycomb rectifying plate fixing plate connected to the side wall of the main body shell, the honeycomb rectifying plate fixing plate is located between the honeycomb rectifying plate and the first filter screen, and the honeycomb rectifying plate fixing plate The section is arc-shaped at the periphery; the airtight rubber edge is also arranged on the periphery between the fixed plate of the honeycomb rectifying plate and the first filter screen, and the airtight rubber edge is pressed together by the locking mechanism of the first filter screen. The honeycomb rectifying plate is also loaded with cold catalyst or photocatalyst.

The preferred structure is: the wind deflector of the fan box is made of EPP material, and other materials with high sound absorption coefficient can also be used. Other materials that meet the above conditions such as EPU, glass fiber cotton with a composite protective surface, and a micro-pore structure Such materials as diatom board, etc.; it can effectively reduce the noise generated by the wind hitting the fan box 3; such a structure can reduce the noise radiation to the main body shell 2, and also minimize the noise source generated by the centrifugal fan 4 .

The beneficial effects of the present invention are: the present invention adopts a vertical frame from top to bottom in terms of overall structure, so that the entire air purifier occupies less floor area and has a compact structure; in addition, the present invention breaks through traditional air purifiers and adopts low The structural design of the filtration efficiency, through the structural design of multiple air guidance, rectification and noise reduction, the noise value of the centrifugal fan can be significantly reduced under the condition of high-speed operation to ensure the purification efficiency. Multiple filters are used to purify the air, so that dust or particles of different particle sizes can be filtered out gradiently, which improves the quality and effect of air purification; it can effectively solve PM0.1 or above harmful particles and household gaseous pollution. The outstanding advantage of the present invention is that it can maintain high air volume and high filtering efficiency while effectively reducing noise.

Description of drawings

Figure 1 is a sectional view of the internal structure of the invention.

Fig. 2 is an outline structure diagram of the present invention.

Fig. 3 is a structural diagram of the best implementation of the V-shaped air outlet channel formed by the central splitter plate and side air deflectors of the present invention.

Fig. 4 is a flow diagram of air flow when the present invention works.

Fig. 5 is a graph comparing the present invention with sample experiments.

In the figure, 1. Bottom case 2. Main body case 3. Fan box 4. Centrifugal fan 5. Fan fixing frame 6. Fan box deflector 7. Honeycomb rectifying plate 8. First filter 9. Bottom case sound insulation board 10. Gas filter 11. Second filter 12. Airtight rubber edge 13. Side air deflector 14. Central splitter 15. Top case 16. Air outlet 17. Honeycomb rectifying plate fixing plate 18. Air inlet 19. The first filter locking mechanism 20, the second filter locking mechanism 21, the air outlet protection net of the fan box 22, and the vibration isolation component.

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, the present invention is realized like this, and it comprises main body shell 2 and top casing 15 and bottom casing 1 that are respectively connected at the top and bottom of main body casing 2, and its structural feature is, it also It includes a central splitter plate 14, a side wind deflector 13, a second filter screen 11, a gas filter screen 10, a fan box 3, a honeycomb rectifying plate 7 and a first filter screen 8 connected sequentially in the main body shell 2 from top to bottom; The second filter 11 , the gas filter 10 , the fan box 3 , the honeycomb rectifying plate 7 and the first filter 8 form an integral airtight structure. The continuity of the above-mentioned airtight structure allows the airflow to pass through in order from bottom to top, preventing dislocation of gas filtration passage. The first filter screen 8 and the second filter screen 11 are used as the primary filter screen and the high-efficiency filter screen respectively, wherein the first filter screen 8 completes the preliminary filtration of the air, mainly filters the larger suspended matter in the air, and the second filter screen The net 11 completes the high-level filtration of the air, mainly filtering the smaller human body inhalable particles in the air.

During implementation, the height of the main body shell 2 is changed according to the size of the internal components, which makes the height of the overall body structure variable. In this way, it is more convenient when dismounting or installing, and also enables the body to be conveniently provided with any type of air cleaning device.

The central splitter plate 14 is fixedly connected to the inner wall of the top casing 15, and the central splitter plate 14 and the side wind guide plate 13 connected to the inner side wall of the main body shell 2 form a V-shaped air outlet channel in a cross-section, and the vertical The air flow guides into a parallel air flow and splits it out; the central splitter plate 14 and the side air guide plate 13 are made of EPP material, and can also be EPU, glass fiber cotton with a composite protective surface, and materials with microporous structures such as silicon Algae board etc. Before the air outlet 16 on the top of the air purifier, a combined design of noise-reducing split flow is set. After the air passes through the second filter screen 11, the flow is close to the laminar flow state, but the noise generated by the fan still exists. In order to avoid the remaining The noise affects the indoor environment, and the purified air is guided to the central part of the air purifier under the action of the side air deflectors 13 on both sides of the upper end of the second filter screen 11, and then the central splitter plate 14 and the side air deflectors are used. The V-shaped air outlet channel formed by 13 smoothly diverts the purified air to the air outlet 16 of the air cleaner. Both the central splitter plate 14 and the side air deflectors 13 use materials with high sound absorption coefficient (EPP material, EPU, glass fiber cotton with a composite protective surface, and materials with microporous structures such as diatom boards, etc.), so that the airflow after the diversion Noise is reduced.

In the whole structure, it is particularly critical that the central splitter plate 14 and the side air guide plate 13 form a V-shaped air outlet channel in cross-section. Figure 3 shows the optimal implementation size ranges of the central splitter plate 14 and the side air guide plate 13 respectively; in,

D1 is the distance between the bottom of the side wind deflector 13 and the second filter screen 8, which is implemented between 5-50mm;

D2 is the distance between the bottom of the central splitter plate 14 and the second filter screen 8, which is implemented between 5-60mm;

D3 is the shortest distance between the side air guide plate 13 and the central splitter plate 14, which is implemented between 20-80mm;

A1 is the air guide angle of the side air guide plate 13 on the air outlet surface, which is implemented between -30°-+30°;

A2 is the air guide angle of the central splitter plate 14 on the air outlet surface, which is implemented between 0-30°;

A3 is the central distribution angle of the central distribution plate 14, which is implemented between 10-90°;

R1 is the arc curvature of the side wind deflector 13 at the corner end, which is implemented between R3mm-R25mm;

R2 is the arc curvature of the central splitter surface of the central splitter plate 14 connected to the air guide surface, which is implemented between R20mm-R120mm;

R3 is the arc curvature of the bottom of the side wind deflector 13 for receiving and concentrating the wind flow, and is implemented between R30mm-R150mm.

The above are only examples of the utility model, and are not intended to limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model description and accompanying drawings, or directly or indirectly used in other related Technical fields are all included in the scope of patent protection of the utility model in the same way.

The bottom casing 1 is provided with several air inlets 18, and a bottom casing sound insulation board 9 is arranged between the inner wall of the air inlet 18 and the inner wall of the main body shell 2; this makes it applicable to some occasions with special requirements, such as ventilation Or the room needs positive overpressure or as a purification device for clean air; in the air purification application of ventilation or positive overpressure device, a conduit can be used to connect to the air inlet 18 of the equipment, and the air passes through the multiple purification of the air purifier. It is pushed into the room to achieve purification, overpressure and ventilation effects. The air inlet 18 is in the shape of a circle, an oval, a square or a rectangle, and the number of the air inlet 18 is 1 to 6; the regular air inlet 18 is conducive to pipeline connection, and there are multiple air inlets 18, which is beneficial to effectively guide Air enters from a plurality of air inlets 18, avoiding the noise caused by the excessively fast wind speed of a traditional single air inlet; The air inlet is trumpet-shaped, and the cross-sectional area of the minimum diameter of the air inlet of the fan box 3 is 0.7-1.7 times of the total area of the air inlet 18; , the air inlet 18 concentrates the air into the wind, which increases the wind speed of the wind. In the case of high wind speed but no surge, it can greatly reduce the noise generated by the blades of the centrifugal fan 4 when they rotate. The bottom spreads out. This design greatly reduces the noise of the air inlet 18 without generating large wind resistance.

The fan box 3 is located in the middle of the main body shell 2, and the centrifugal fan 4 is fixed in the fan box 3 by the fan fixing frame 5; The wind deflector 6 of the fan box below is fixedly connected to the inner wall of the fan fixing frame 5 .

The second filter screen 11 and the first filter screen 8 are respectively fixed by the second filter screen locking mechanism 20 and the first filter screen locking mechanism 19 located on the inner wall of the main body shell 2 .

Between the second filter screen 11 and the gaseous filter screen 10 and between the gaseous filter screen 10 and the wind box outlet protection screen 21, the periphery is provided with an airtight rubber edge 12, which is pressed by the second filter screen locking mechanism 20. tight. An airtight structure is formed by the airtight edge 12 . It can effectively prevent air from leaving the body without passing through the filter. This can effectively ensure the high-efficiency filtration effect and prevent the whistling sound generated by the air passing through the narrow gap at high speed.

A vibration isolation assembly 22 is provided between the centrifugal fan 4 and the fan fixing frame 5 . This makes the centrifugal fan 4 not in direct contact with the fan fixing frame 5 and reduces the vibration when the fan rotates to the main body shell 2 through physical means to cause vibration noise.

The honeycomb rectifying plate 7 is fixed by the honeycomb rectifying plate fixing plate 17 connected to the side wall of the main body shell 2, and the honeycomb rectifying plate fixing plate 17 is located between the honeycomb rectifying plate 7 and the first filter screen 8, and the honeycomb rectifying plate 7 Honeycomb hole plastic board, honeycomb hole aluminum plate, honeycomb hole cardboard or other non-honeycomb fine-hole wind deflectors can be used, the thickness is between 5mm and 50mm, and the hole diameter is between 1mm and 12mm. And the periphery of the cross section of the honeycomb rectifying plate fixing plate 17 is arc-shaped; the honeycomb rectifying plate 7 effectively guides the air that has been preliminarily filtered into the fan box 3, and the honeycomb rectifying plate 7 can reduce the turbulent flow entering the air inlet of the fan box 3, and effectively reduce the air flow from the air inlet. The noise of the air vent is generated. An airtight rubber edge 12 is also provided on the periphery between the honeycomb rectifying plate fixing plate 17 and the first filter screen 8 , and the airtight rubber edge 12 is pressed together by the first filter screen locking mechanism 19 . The honeycomb rectifying plate 7 is also loaded with a cold catalyst or a photocatalyst to enhance the performance of air purification.

The wind deflector 6 of the fan box is made of EPP material, and other materials with high sound absorption coefficient can also be used, which can effectively reduce the noise generated by the wind hitting the fan box 3; such a structure can reduce the noise radiation from spreading to the main body In addition to the shell 2, the noise source produced by the centrifugal fan 4 is also reduced to a minimum.

As shown in Figure 4, the working principle of the present invention is such that the air enters through the air inlet 18, first passes through the first filter screen 8, and completes the preliminary filtration of the air by the first filter screen 8, and passes through the honeycomb rectifying plate from bottom to top 7 enters the fan box 3, and under the action of the high-speed centrifugal fan 4, the air quickly passes through the gaseous filter 10 and the second filter 11 in sequence, and finally a V-shaped outlet with a cross-section is formed by the central splitter 14 and the side deflectors 13. The wind channel is discharged; in the whole process, the airflow passes through the sound insulation board 9 of the bottom shell, the honeycomb rectifying plate 7, the wind deflector 6 of the fan box, the central splitter plate 14 and the side wind deflector in sequence from the air inlet, to the fan pressurization and the air outlet 13 rectification and noise reduction; in this way, the gas discharged from the air outlet 16 has been purified many times, and the efficiency and effect of purification have been improved. Compared with traditional purifiers, the noise reduction of the present invention is very significant when operating under the same conditions.

The following are the measured results of the present invention. Except for the wind guide + rectification + noise reduction structure of the present invention, the comparison prototype has the same structure, housing materials, fan and filter screen. The ambient noise during the actual measurement is about 30dBA. The present invention and the prototype are measured at full speed successively, and the sound pressure meter is placed 1 meter away from the prototype body for measurement.

The measured results are listed in Table 1 and Figure 5 in detail;

As can be seen from Table 1 and Fig. 5, the noise reduction effect of the present invention is particularly good at medium and low frequencies, and the frequency noise reduction ability of 150Hz-400Hz is the highest (up to 7-13dBA); Reduced fan noise. Except for the high frequency above 10K Hz, the overall frequency has a certain degree of decrease. After using the invention, the overall sound pressure value decreases from 64dBA to 56dBA.

Because the present invention does not use a structure with large wind resistance, the wind flow changes slightly while reducing noise effectively, so the present invention effectively reduces noise but does not increase the cost of use. In addition, the present invention does not need to greatly increase the length of the product, but adds a noise reduction structure in the necessary space of the product itself. The compact structure does not increase the occupied space of the present invention. This is especially important for urban housing with high housing prices. Moreover, in the air purifier of the present invention, the air is filtered and purified from the bottom up, and the purified air is just at the height of people standing and sitting, so that the user can directly experience the purified air most effectively; Table 1

Frequency Hz Prototype sound pressure value dBA Sound pressure value dBA of the present invention Sound pressure value dBA change difference 50 41 41 0 100 49 46 -3 150 63 50 -13 200 59 48 -11 300 61 54 -7 400 61 50 -11 500 51 48 -3 750 53 49 -4 1000 57 53 -4 1500 54 50 -4 2000 49 45 -4 3500 48 41 -7 5000 39 37 -2 7500 32 29 -3 10000 25 26 1 15000 27 28 1 20000 28 28 0 overall frequency 64 56 -8

Claims (10)

1. A high-efficiency and quiet air cleaner, which comprises a main body shell (2) and a top casing (15) and a bottom casing (1) that are respectively connected to the top and bottom of the main body casing (2), is characterized in that it It also includes a central splitter plate (14), a side wind guide plate (13), a second filter screen (11), a gas filter screen (10), a fan box (3), and a Rectifying plate (7) and first filter screen (8); Described second filter screen (11), gaseous filter screen (10), fan box (3), honeycomb rectifying plate (7) and first filter screen (8 ) form an integral airtight structure; The central splitter plate (14) is fixedly connected to the inner wall of the top casing (15), and the central splitter plate (14) and the side wind deflector (13) connected to the inner side wall of the main body shell (2) form a section of The V-shaped air outlet channel guides the vertical airflow into parallel airflow and splits it out; The bottom casing (1) is provided with several air inlets (18), and a bottom casing sound insulation board (9) is arranged between the inner wall of the air inlet (18) and the inner wall of the main body casing (2); The fan box (3) is located in the middle of the main body shell (2), and the centrifugal fan (4) is fixed in the fan box (3) through the fan fixing frame (5); the top of the fan box is provided with a fan box wind protection net (21), the fan box deflector (6) positioned below the fan box outlet protection net (21) is fixedly connected on the inner wall of the fan holder (5). 2. The efficient and silent air cleaner according to claim 1, characterized in that, the second filter screen (11) and the first filter screen (8) pass through the second filter screen located at the inner side wall of the main body shell (2) respectively. The filter screen locking mechanism (20) and the first filter screen locking mechanism (19) are fixed. 3. The efficient and silent air cleaner according to claim 1, characterized in that, between the second filter screen (11) and the gaseous filter screen (10) and between the gaseous filter screen (10) and the air box outlet The perimeter between the protection nets (21) is provided with airtight rubber edges (12), which are compressed by the second filter net locking mechanism (20). 4. The high-efficiency and silent air cleaner according to claim 1, characterized in that, a vibration-absorbing assembly (22) is provided between the centrifugal fan (4) and the fan fixing frame (5). 5. the efficient quiet air cleaner as claimed in claim 1, is characterized in that, the air inlet of described fan box (3) is trumpet shape, and the cross-sectional area of the minimum diameter of the air inlet of fan box (3) is 0.7-1.7 times of the total area of the air inlet (18). 6. the efficient quiet air cleaner as claimed in claim 1, is characterized in that, described honeycomb rectifying plate (7) is fixed by the honeycomb rectifying plate fixing plate (17) that is connected in main body casing (2) sidewall, and The honeycomb rectifying plate fixing plate (17) is positioned between the honeycomb rectifying plate (7) and the first filter screen (8), and the honeycomb rectifying plate (7) is made of honeycomb hole rubber plate, honeycomb hole aluminum plate, honeycomb hole cardboard or other Made of non-honeycomb-shaped fine-hole wind deflector, the thickness of the honeycomb rectifying plate (7) is between 5mm and 50mm, and the hole diameter is between 1mm and 12mm; and the honeycomb rectifying plate fixing plate (17) The periphery of the section is arc-shaped; the periphery between the honeycomb rectifying plate fixed plate (17) and the first filter screen (8) is also provided with an airtight rubber edge (12), and the airtight rubber edge (12) passes through the first A filter screen locking mechanism (19) is pressed. 7. The efficient and quiet air cleaner according to claim 1, characterized in that, said central splitter plate (14) and side wind deflectors (13) are made of materials with a certain sound absorption coefficient and high mechanical strength, The material with certain high sound absorption coefficient and mechanical strength is EPP material. 8. The efficient and silent air purifier according to claim 1 or 5, characterized in that, the air inlet (18) is in the shape of a circle, an oval, a square or a rectangle, etc., the air inlet (18) Quantity is 1 to 6 pieces. 9. The efficient and silent air cleaner according to claim 1, characterized in that, the wind deflector (6) of the fan box is made of a material with a certain sound absorption coefficient, and the material with a certain sound absorption coefficient is EPP Material. 10. The efficient and quiet air cleaner according to claim 1 or 6, characterized in that, the honeycomb rectifying plate (7) is also loaded with a cold catalyst or a photocatalyst.