CN205119388U - Air purifier - Google Patents

Abstract

The utility model relates to an air purifier, which is composed of a shell, an electric control system installed in the shell, a filter system and a fan system, and the fan system includes an air duct cavity structure and a structure installed in the air duct cavity structure. A centrifugal fan inside, the air channel cavity structure includes an upper cover plate and a lower cover plate and an air channel cavity wall surrounding the outer periphery of the centrifugal fan, at least one of the upper cover plate and the lower cover plate is provided with an air inlet, The wall surface of the air duct cavity is provided with an air outlet, and the wall surface of the air outlet on one side of the air outlet is a vortex tongue, which is formed by extending outward from the wall surface of the air duct cavity, and the air outlets are not less than two , and at the position close to the vortex tongue, the inner surface of the wall of the air channel cavity protrudes outward in a direction away from the axis of the centrifugal fan, thereby forming at least one protrusion, achieving The effect of equalizing the wind and reducing the noise of the air outlet.

Description

Air Purifier

technical field

The utility model relates to the field of air purifier equipment, in particular to an air purifier which adopts a centrifugal fan to construct a fan system.

Background technique

Air purifiers, also known as "air cleaners", refer to products that can absorb, decompose or transform various air pollutants to effectively improve air cleanliness. They are mainly used to solve PM2.5, dust, pollen, odor, formaldehyde and the like. Indoor air pollution problems caused by decoration pollution, bacteria, allergens, etc.

Existing air purifiers mainly include electric control system, filter system and fan system. The electric control system is used to control the work of the fan system and provide additional functions, such as ozone disinfection, ultraviolet disinfection, etc. The filter system is used to intercept air pollution For particles, the fan system is used to blow the air out after passing through the filter system.

Existing air purifiers mostly use centrifugal fans to build their fan systems, which include an air duct cavity structure, an air outlet opened on the air duct cavity structure, and an air duct installed in the air duct cavity structure. centrifugal fan. As people's demand for air purifiers continues to increase, the demand for noise reduction and energy saving also increases, and higher requirements are placed on their fan systems.

The air outlet direction of the existing fan system is too single, and the noise is too large; the main noise of the fan system is the eddy current noise in the aerodynamic noise, and the eddy current noise is generated by the separation and shedding process of the boundary layer at the outlet of the centrifugal fan blade and the gas in the air duct cavity. The separation process during the diffusion flow seriously affects the air supply effect and the comfort of use.

To solve this problem, the existing technical solutions mostly adopt methods such as installing sound-absorbing materials or adding sound-absorbing devices, which are complex in structure and high in cost; and the improved technical solutions of vortex tongues have limited effects on eddy current noise. Therefore, it is very necessary to optimize the structure of the air duct cavity to reduce noise and fan energy consumption.

Therefore, how to take into account multi-directional wind and noise is a technical problem that needs to be solved urgently in the industry.

Utility model content

The utility model aims to provide an air purifier with an optimized fan system to solve the problems of single air outlet direction and large noise at the air outlet of the existing air purifier.

In order to solve the above-mentioned technical problems, the air purifier of the present utility model is composed of a shell, an electric control system installed in the shell, a filter system and a fan system. The fan system includes an air duct cavity structure and is installed in the A centrifugal fan in the air channel cavity structure, the air channel cavity structure includes an upper cover plate and a lower cover plate and an air channel cavity wall surrounding the outer periphery of the centrifugal fan, at least one of the upper cover plate and the lower cover plate Once the air inlet is set, the wall surface of the air duct cavity is provided with an air outlet, and the wall surface of the air outlet on the side of the air outlet is a vortex tongue, and the vortex tongue is formed by extending outward from the wall of the air duct cavity. It is characterized in that: There are no less than two air outlets, and at the position close to the volute tongue, the inner surface of the wall of the air channel cavity protrudes outward in a direction away from the axis of the centrifugal fan, so that At least one protrusion is formed.

Further, the protruding part is a protruding part of an arc surface.

Further, the air outlets are evenly distributed on the circumference.

Further, the vortex tongue part of at least one tuyere is connected with the wall surface of the air channel cavity extending to form the vortex tongue part through a connecting plate; one end of the connecting plate is connected with the outer surface of the vortex tongue part, and the other end is connected with the wall surface of the air channel cavity connected on the outer side.

Further, one end of the connecting plate is connected to the far wind end of the vortex tongue, and the other end is connected to the far wind end of the wall surface of the air channel extending from the vortex tongue.

The air purifier of the utility model optimizes the design of the fan system. First, a plurality of air outlets are evenly distributed on the wall surface of the air duct cavity to homogenize the direction of the wind, reduce the air pressure in the air duct cavity structure, and reduce the impact noise of the air flow; further, The protruding part is provided on the wall of the air duct cavity, so that the structure of the air duct cavity has a large-small-large change in the direction of the centrifugal fan. The blades of the centrifugal fan rotate through the protruding part, and the air duct cavity The sudden increase of the bulge leads to a sudden drop in pressure near the bulge in the air duct cavity, which prompts the generation of eddy current noise on the blades in advance, and transfers most of the eddy current and eddy current noise generated at the air outlet to the sealing and sound insulation effect. generated in the air duct cavity, so as to achieve the effect of reducing air noise at the air outlet.

Description of drawings

Fig. 1 shows the schematic cross-sectional view of the air duct cavity structure of the air purifier of Embodiment 1 of the present utility model;

Fig. 2 shows the schematic cross-sectional view of the structure of the air duct cavity of the air purifier of Embodiment 2 of the present utility model;

Fig. 3 shows the schematic cross-sectional view of the structure of the air duct cavity of the air purifier of Embodiment 3 of the present utility model;

Fig. 4 shows a schematic cross-sectional view of the structure of the air duct cavity of the air purifier according to Embodiment 4 of the present utility model.

detailed description

To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

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

Example 1:

Figure 1 is a schematic cross-sectional view of the structure of the air duct cavity of the air purifier of this embodiment, which has a housing (not shown in the figure) and an internal electronic control system (not shown in the figure) and filtering system (not shown in the figure). shown) and fan system; the fan system includes an air duct cavity structure and a centrifugal fan 1 installed in the air duct cavity structure, the air duct cavity structure includes an upper cover plate (removed and not shown Out) and the lower cover plate 2 and the air channel cavity wall 3 arranged vertically and surrounding the periphery of the centrifugal fan 1, at least one of the upper cover plate and the lower cover plate is provided with a plurality of ventilation holes or a fence or mesh as the air inlet, The wall is provided with a first air outlet 21 and a second air outlet 22; the first air outlet 21 and the second air outlet 22 are symmetrically arranged with the centrifugal fan 1 as the center, and the air outlet directions are evenly distributed to reduce the wind pressure. And reduce the best effect of airflow impact.

Wherein the vortex tongue part 41 of the first air outlet 21 and the vortex tongue part 42 of the second air outlet 22 are respectively formed by the outward extension of the air duct wall surface 3; at the position adjacent to the vortex tongue part 41, the air duct The inner surface of the cavity wall surface 3 protrudes outward in the direction away from the axial center of the centrifugal fan 1 to form a protruding part 411, which is a protruding part of a circular arc surface; The inner surface of the air duct cavity wall 3 protrudes outward in the direction away from the axial center of the centrifugal fan 1 to form a protrusion 421, which is also a protrusion of a circular arc surface; A plurality of protrusions 411 or protrusions 421 may be additionally formed, not limited to one of this embodiment.

When the blades of the centrifugal fan 1 rotate through the protruding part 411 or the protruding part 421, because the space of the air duct cavity suddenly becomes larger in the direction away from the axial center of the fan 1, the pressure there suddenly decreases, prompting the centrifugal fan blades to be produced in advance. The eddy current, that is, the eddy current and eddy current noise that should have been generated at the first air outlet 21 or the second air outlet 22 is transferred to the air duct cavity with better sealing and sound insulation, thereby improving output and reducing wind. noise purpose.

Example 2:

As shown in Figure 2, this embodiment is basically the same as Embodiment 1, and its main difference is as follows:

At the first air outlet 21, a connecting plate 412 is provided at the angle between the volute tongue portion 41 and the wall surface 3 of the air duct cavity. The outer surface of the wall 3 is connected, so that the bottom of the vortex tongue 41 is integrated with the wall 3 of the air duct cavity. When the centrifugal fan 1 rotates, the airflow flows out of the air outlet and impacts the vortex tongue 41, and the connecting plate 412 acts as a fixed vortex tongue. The function of the part 41 significantly reduces the vibration of the vortex tongue part 41 and the wall surface 3 of the air duct cavity, and plays a role in reducing the noise of the air outlet.

At the same time, the second air outlet 22 also adopts a similar arrangement, and the connecting plate 422 plays a role in reducing the noise of the second air outlet 22 .

Example 3:

As shown in Figure 3, this embodiment is basically the same as Embodiment 2, and its main difference is as follows:

With the centrifugal fan 1 as the center, the first air outlet 21, the second air outlet 22, and the third air outlet 23 are evenly distributed, and the three air outlets are evenly distributed around the circumference, and the air flow from the centrifugal fan 1 can flow out evenly and discretely. The force of the air flow is balanced, which can avoid the vibration and noise of the fan system.

At the same time, the annular side wall 5 surrounds the centrifugal fan 1 for a week, and all the vortex tongues of the air outlet and the wall of the air channel cavity extend to the annular side wall 5 along the air outlet direction, and are connected with the inner surface of the annular side wall 5 . Taking the first air outlet 21 as an example, the volute tongue part 41 continues to extend along the air outlet direction from the starting point close to the centrifugal fan 1 until it contacts the inner surface of the annular side wall surface 5; at the same time, it is connected to the volute tongue part 41 A section of the air channel cavity wall surface 3 extends along the air outlet direction at the air outlet 22 until it contacts the annular side wall surface 5 . The vortex tongue part 41 and the air channel cavity wall surface 3 are jointly connected with the annular side wall surface 5. In this embodiment, the annular side wall surface 5 is used as a connecting plate, so that the vortex tongue part 41 is connected with the air channel cavity extending from the vortex tongue part 41. The wall surface 3 is connected to form an integrated structure, which has the best anti-airflow impact effect, and can achieve the best effect of reducing the vibration noise of the vortex tongue part 41, and the vortex tongue part 41, the wall surface 3 of the air duct cavity and the annular side wall surface 5 can be One-piece forming, easy to produce and process. It can be seen from FIG. 3 that the other air outlets adopt similar settings as above.

Example 4:

As shown in Figure 4, this embodiment is basically the same as Embodiment 3, and its main difference is:

The number of air outlets is 4. Therefore, the air can be discharged from all sides, the gas flow rate is fast, and it has the characteristics of simple structure and low cost. It can improve the problem of uneven distribution of the air duct and increase the air volume.

Taking the first air outlet 21 as an example, one end of the connecting plate 412 is connected to the far wind end of the volute tongue portion 41, and the other end is connected to the far wind end of the air duct cavity wall 3 of the second air outlet 22, as can be seen from FIG. 4 , and the rest of the air outlets adopt similar settings as above.

Although the present invention has been particularly shown and described in connection with preferred embodiments, it will be understood by those skilled in the art that changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined by the appended claims. Making various changes is within the protection scope of the present invention.

Claims (5)

1. The air purifier is composed of a shell and an electric control system installed in the shell, a filter system and a fan system. The fan system includes an air duct cavity structure and a A centrifugal fan, the air channel cavity structure includes an upper cover plate and a lower cover plate and a wall surface of the air channel cavity surrounding the periphery of the centrifugal fan, at least one of the upper cover plate and the lower cover plate is provided with an air inlet, the The wall surface of the air duct cavity is provided with an air outlet, and the wall surface of the air outlet on one side of the air outlet is a vortex tongue, and the vortex tongue is formed by extending outward from the wall surface of the air duct cavity. It is characterized in that: the air outlet is not less than Two, and at a position adjacent to the volute tongue, the inner surface of the wall of the air channel cavity protrudes outward in a direction away from the axis of the centrifugal fan, thereby forming at least one protrusion. 2. The air purifier according to claim 1, characterized in that: said protruding portion is a protruding portion of an arc surface. 3. The air purifier according to claim 1, characterized in that: said air outlets are evenly distributed on the circumference. 4. The air purifier according to claim 1, characterized in that: the vortex tongue portion of at least one air outlet is connected to the wall surface of the air channel cavity extending to form the vortex tongue portion through a connecting plate; one end of the connecting plate is connected to The outer surface of the vortex tongue is connected, and the other end is connected with the outer surface of the air channel cavity wall. 5. The air purifier according to claim 4, characterized in that: one end of the connecting plate is connected to the far wind end of the vortex tongue, and the other end is far away from the wall surface of the air duct cavity extending to form the vortex tongue. The air end is connected.