KR20190115918A - Fan assembly and apparatus for both humidification and air cleaning and including the same - Google Patents

Abstract

The present invention relates to a fan assembly and a humidifying air purifier. According to an embodiment of the present invention, the fan assembly comprises: a scroll unit having a scroll shape with a distance gradually spaced apart from an outer circumference of an air blowing fan along a rotary direction of the air blowing fan; and a cut-off having a shape bent from the scroll unit. The cut-off can include a plurality of through holes.

Description

Fan assembly and humidifying air cleaner including same {Fan assembly and apparatus for both humidification and air cleaning and including the same}

The present invention relates to a fan assembly and a humidifying air cleaner including the same.

An air purifier is understood as a device for inhaling and purifying contaminated air and then discharging the purified air. For example, the air purifier may include a blower for introducing external air into the air cleaner and a filter capable of filtering dust or bacteria in the air.

Humidifiers are understood as devices that inhale, humidify, and then discharge air to provide moisture to the air. Conventional humidifiers are classified into a vibrating type that atomizes water in the diaphragm and discharges it into the air, and a natural evaporating type that evaporates in the humidification filter. The spontaneous evaporative humidifier is a humidifier filter humidifier that rotates the disc by using a driving force, the disc humidifier spontaneously evaporates water on the surface of the disc in the air, and the evaporator spontaneously evaporated by the air flowing from the humidifying medium moistened with water. Are distinguished.

In recent years, humidifying air purifiers having a humidifying function added to an air purifier have been developed. In the case of humidifying air cleaners, hygiene requires the user to periodically clean or replace the filter and bucket. However, the internal structure of the general humidifying air cleaner is relatively complicated, and the water tank that needs to be filled at times is relatively heavy, which makes it difficult for the user to easily operate the water tank.

In addition, when the blowing fan provided in the air cleaner is composed of a multi-wing fan (sirocco fan) which is a kind of centrifugal fan, the pressure due to the flow collision is concentrated at the cut-off part of the blowing fan, and thus noise is There was an increasing problem. The cut-off portion may be understood as a portion forming an interface between the air flow discharged from the blower fan and the air flow re-intake.

1.Publication number (published date): 10-2017-0051276 (May 11, 2017) 2. Name of invention: Humidification air purifier.

The present embodiment is proposed to solve the above problems, and an object of the present invention is to provide a humidifying air cleaner capable of reducing noise generated from the flow discharged from the blowing fan.

In particular, it is an object of the present invention to provide a humidifying air cleaner capable of forming a through hole in a scroll portion of a sirocco fan to reduce noise in a specific frequency range.

Further, an object of the present invention is to provide a humidifying air cleaner capable of reducing noise in a low frequency region by providing a sound absorbing material inside the scroll portion.

The fan assembly according to the present embodiment includes a scroll portion having a scroll shape in which a distance from the outer circumference of the blowing fan is gradually distanced along a rotation direction of the blowing fan, and a cut-off having a shape bent from the scroll portion. The cut off may include a plurality of through holes.

The apparatus may further include a first discharge guide part extending in a direction away from the blower fan from the cut off, and the plurality of through holes may be formed in at least one of the cut off and the discharge guide part.

A sound absorbing material covering the plurality of through holes may be further included.

The sound absorbing material may include polyurethane foam or styrofoam.

A discharge flow path may be further included between the second discharge guide part extending from the scroll part and the first and second discharge guide parts.

The first and second discharge guide parts may extend flatly on both sides of the scroll part.

The sound absorbing material may be installed on an opposite surface of the cut-off or one surface of the first discharge guide part facing the discharge flow path.

According to another aspect of the present invention, a humidifying air purifier includes a door assembly removably coupled to a cabinet, an air filter assembly and a humidifying filter assembly installed in the door assembly, and a fan assembly disposed at an outlet side of the humidifying filter assembly. It may be further included.

The fan assembly may include a blower fan having a main plate and a plurality of blades provided in the circumferential direction and suctioning air in an axial direction and discharging in a radial direction.

The fan assembly may include a scroll portion protruding from the cover body, a scroll portion having a scroll shape, and bent or rounded from the scroll portion and having a plurality of holes.

A sound absorbing material provided in the cut off and covering the plurality of through holes may be further included.

The first and second discharge guide portions extending from both sides of the scroll portion and the discharge passage formed between the first and second discharge guide portion may be further included.

The first discharge guide part may extend in a direction away from the blower fan from the cut off.

According to the present embodiment, a plurality of through holes may be formed in the scroll portion that guides the flow of the blowing fan to reduce noise generated during air flow due to resonance effects.

In particular, a cutoff shape is implemented in the discharge guide part for guiding the flow of air discharged from the blower fan, and the plurality of through holes are formed in a portion at which the cutoff shape is implemented, so that the discharge flow and the resuction flow in the cutoff part are performed. Noise generated by the collision can be reduced.

In addition, by installing the suction material in the portion where the plurality of through-holes are formed, there is an effect that the generation of noise in the relatively low frequency region can be reduced.

1 is a perspective view showing the configuration of a humidifying air cleaner according to an embodiment of the present invention.
2 is a view showing a state in which the door of the humidifying air cleaner according to an embodiment of the present invention is opened.
Figure 3 is an exploded perspective view showing the configuration of a humidifying air cleaner according to an embodiment of the present invention.
4 is a cross-sectional view taken along line VV ′ of FIG. 1.
5 is an exploded perspective view showing a blowing fan and its surrounding configuration according to an embodiment of the present invention.
6 is a perspective view showing the configuration of a blowing fan according to an embodiment of the present invention.
7 is a perspective view showing a front configuration of a housing cover according to an embodiment of the present invention.
8 is a front view of a housing cover showing the inside of the blowing fan according to the embodiment of the present invention.
9 is a perspective view showing the configuration of the discharge guide portion of the housing cover according to an embodiment of the present invention.
10 is a side view showing the configuration of a blowing fan and a discharge guide unit according to an embodiment of the present invention.
11 is a plan view showing a configuration of a blowing fan and a discharge guide unit according to an embodiment of the present invention.
12 is a cross-sectional view taken along line XII-XII ′ of FIG. 9.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, when it is determined that a detailed description of a related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

1 is a perspective view showing the configuration of a humidifying air cleaner according to an embodiment of the present invention, Figure 2 is a view showing a state in which the door of the humidifying air cleaner according to an embodiment of the present invention opened.

1 and 2, a humidifying air purifier 10 according to an exemplary embodiment of the present invention includes a cabinet 100 that forms an exterior and a door assembly 200 that is releasably coupled to the cabinet 100. Included.

The cabinet 100 includes a plurality of panels. In detail, the plurality of panels include a lower base 101, two side panels 103 provided on both sides of the lower base 101 and extending upward, and side panels 103 on both sides. An upper panel 105 coupled to the upper side and a rear panel 107 coupled to the rear sides of the side panels 103 on both sides are included. By the base 101, the two side panels 103, the top panel 105 and the back panel 107, the cabinet 100 may have a rectangular parallelepiped shape in which the front part is opened.

Since the plurality of panels may be made of wood to give an aesthetic appearance to furniture, the appearance may be beautiful.

An air filter assembly 280, a humidification filter assembly 300, a blowing fan 480 (see FIG. 4), and the like may be disposed in the interior space of the cabinet 100. The air filter assembly 280 and the humidification filter assembly 300 may be collectively referred to as a “filter assembly”.

The door assembly 200 may be provided to be drawn out to the front of the cabinet 100 to be opened or to be drawn back to be closed. The door assembly 200 includes a door panel 210 constituting the front portion of the humidifying air cleaner 10.

For example, the door panel 210 may have a shape of a square plate. In addition, in the state in which the door assembly 200 is closed, the door panel 210 forms an exterior of the front part of the humidifying air cleaner 10. The door panel 210 may be made of wood to feel aesthetics such as furniture.

In the front lower portion of the air cleaner 10, a depression 30 for sucking air into the inside of the air cleaner 10 may be formed. In detail, the depression 30 may be formed between the lower end of the door panel 210 and the base 101. The depression 30 is a space defined by the lower end of the door panel 210, the base 101 and the side panels 103 on both sides, and may have a substantially quadrangular shape.

In addition, a suction part 225 is formed on the upper side of the recess 30 to suck air into the cabinet 100. The suction part 225 may be formed on the lower surface of the door 224 to be described later.

A discharge part 109 through which filtered and humidified air is discharged is formed at a rear part of the upper panel 105 of the cabinet 100. The discharge part 109 may be located at the rear upper portion of the humidifying air cleaner 10. The discharge part 109 may be provided with a discharge grill 109a.

The top panel 105 forms a flat surface. Therefore, the upper panel 105 can function as a storage unit that can accommodate articles such as books or ornaments.

The door assembly 200 further includes a receiving part 220 extending rearward from the rear surface of the door panel 210 to install a part of the humidifying air cleaner 10. The component may include an air filter assembly 280, a humidification filter assembly 300, and a bucket 270.

When the door assembly 200 is pulled out and opened, the air filter assembly 280, the humidification filter assembly 300, and the water tank 270 disposed in the accommodation part 220 may be pulled out together forward. . Therefore, a user may easily access the air filter assembly 280, the humidification filter assembly 300, and the bucket 270.

The door assembly 200 further includes a rail guide 230 for guiding the withdrawal or withdrawal of the door assembly 200. The rail guide 230 may be coupled to both lower sides of the accommodation portion 230.

3 is an exploded perspective view showing the configuration of a humidifying air cleaner according to an embodiment of the present invention, Figure 4 is a cross-sectional view taken along the line VV 'of FIG.

3 and 4, the humidifying air purifier 10 according to an embodiment of the present invention, the air filter assembly 280 for filtering the air, the humidification filter assembly 300 and the air for humidifying the air Blowing fan 480 for generating a flow is included.

In detail, the cabinet 100 includes a body part 110 forming a space part 112 in which parts of the air cleaner are disposed.

The front part of the body part 110 may be opened, and the open front part may be shielded by the door assembly 200. The rear portion of the body 110 may be opened, and the opened rear portion may be shielded by the fan housing 410 and the housing cover 430. In addition, the upper portion of the body portion 110 is open, the open upper portion may be shielded by the electrical equipment 450.

The two side panels 103 are coupled to both sides of the body portion 110. The top panel 105 may be coupled to an upper side of the electrical component unit 450, and the rear panel 107 may be coupled to a rear side of the housing cover 430.

The door assembly 200 includes a door panel 210 forming a front appearance and a receiving portion 220 extending rearward of the door panel 210. The accommodation part 220 includes a door front part 221 coupled to a rear surface of the door panel 210. The door panel 210 and the door front part 221 may be collectively referred to as a "door front part".

The accommodating part 220 includes a door side part 222 extending rearward from both sides of the door front part 221, a door lower part provided at a lower side of the door side part 222, and a rear side of the door bottom part. A door rear portion extending upward is included. By the door front part 221, the door bottom part, the door side part 222, and the door rear part, the water tank 260, the water tank 270, and the air filter assembly 280 are formed inside the accommodating part 220. ) And an installation space in which the humidification filter assembly 300 is installed may be defined.

An air filter assembly 280 may be installed at the front portion of the accommodation portion 220. The air filter assembly 280 may include an air filter case 281 and an air filter 285 coupled to the air filter case 281. The air filter assembly 280 may be disposed to be lifted upward and separated from the accommodating part 220.

Based on the front-rear direction, a water tank 270 may be disposed at an approximately center portion of the accommodation portion 220, that is, the rear side of the air filter assembly 280. The bucket 270 may be installed in the water tank 260. The bucket 270 may be disposed to be lifted upward and separated, and the user may separate the bucket 270 to replenish water or to wash the bucket 270.

A valve hole (not shown) for discharging water is formed in the bottom portion 275 of the bucket 270, and a valve device 276 for selectively opening and closing the valve hole may be installed in the valve hole. The valve device 276 may operate to open the valve ball when placed in a valve support part (not shown) provided in the water tank 260, and to close the valve ball when separated from the valve support part.

In addition, the bucket 270 may include a bucket lid 271 for opening and closing the inner space containing water. The bucket lid 271 may be coupled to the upper end of the bucket 270 to be detachable.

The water tank 260 may have a shape of a substantially hexahedron having an open top. The lower part of the water tank 260 includes a bucket support part 261 supporting the bucket 270. The bucket support part 261 forms a flat surface.

The water tank 260 further includes a float receiving portion 262 that protrudes downward from the bucket supporting portion 261 and has a space in which the float device 267 is installed. The float receiving portion 262 has a hollow shape having an empty inside, and may be positioned at an approximately central portion of the bucket supporting portion 261.

The float receiving portion 262 may form a first reservoir portion in which water is stored, and the float device 267 may be provided to be movable in a vertical direction according to the level of water stored in the first reservoir portion. When the water level of the first reservoir is greater than or equal to a predetermined level, the float device 267 may move upward to block the valve hole of the bucket 270.

Inside the tank 260, a second reservoir 229 extending rearward from the float receiver 262 and storing water may be formed. The second reservoir part 229 may communicate with the first reservoir part and form the same water level as the first reservoir part.

The humidifying filter assembly 300 may be installed in the second reservoir 229. A lower portion of the humidification filter 330 may be disposed to be locked to the second reservoir 229.

The humidification filter 330 may have a substantially circular shape and may be rotatably provided. The humidification filter 330 may be made of a cloth, felt or sponge material that is easy to absorb water.

The humidification filter assembly 300 may be disposed at the rear portion of the receiving portion 220, that is, at the rear side of the bucket 270. The humidification filter assembly 300 includes a humidification filter case 330 rotatably supported by the humidification filter case 310 and the humidification filter case 310 and absorbing water stored in the water tank 260. .

The humidifying air cleaner 10 further includes a housing assembly 400 disposed inside the cabinet 100. The housing assembly 400 includes a blowing fan 480 for generating air flow, a fan housing 410 disposed in front of the blowing fan 480, and a housing cover coupled to a rear side of the fan housing 410. 430 is included. The blowing fan 480 may be installed in a fan installation space defined by the fan housing 410 and the housing cover 430.

The housing assembly 400 may be disposed at the rear side of the door assembly 200.

The blower fan 480 includes a centrifugal fan that sucks air in the axial direction and discharges it in the radial direction. In one example, the centrifugal fan may include a multi-fan (sirocco fan). The axial direction of the blowing fan 480 may be a front and rear direction.

The fan housing 410 includes a fan suction part 415. The fan suction part 415 may include a suction guide rib extending radially or circumferentially. By the suction guide rib, a large foreign material or a user's hand can be prevented from being introduced into the blowing fan 480.

The humidified air cleaner 10 further includes an electric component 450 including a plurality of electronic components 453. The electrical component part 450 may further include an electrical component plate 451 covering an open upper portion of the body part 110, and the electrical component part 453 may be installed on an upper surface of the electrical component plate 451. . The electrical component unit 450 may further include an electrical component cover 455 for shielding at least a portion of the plurality of electronic components 453.

The electrical plate 451 may extend forward from the top of the housing assembly 400. In addition, the upper panel 105 may be coupled to an upper side of the electrical plate 451 to protect the electrical component 453.

Inside the body 110, a rail assembly may be installed to guide the drawing of the door assembly 200. The rail assembly may be disposed on both lower sides of the body portion 110. The rail guide 230 provided in the door assembly 200 may slide forward and backward along the rail assembly.

Air passages 71, 73, 75, and 77 are formed inside the humidified air cleaner 10. First air paths (71, 73, 75, 77), the first flow path for guiding the air sucked through the inlet 30 through the suction unit 225 flows to the air filter (285) ( 71). The first flow path 71 is understood as a suction flow path of the air filter 285 and may extend in the vertical direction.

The width in the front-rear direction of the first flow path 71 may be formed differently based on the vertical direction. For example, a lower width of the first flow path 71 may be greater than an upper width of the first flow path 71. The difference in the flow path width may be due to the configuration in which the upper portion of the air filter 285 is inclined forward.

The air passages 71, 73, 75, and 77 further include a second flow passage 73 extending from the air filter 285 toward the humidification filter 330. The second flow path 73 may be formed above the bucket 270. The second flow path 73 is understood as a suction flow path of the humidification filter 330 and may extend in the front-rear direction. The size of the second flow path 73 may be larger than that of the first flow path 71.

The air flow paths 71, 73, 75, and 77 further include a third flow path 75 extending from the humidification filter 330 to the suction side of the blowing fan 480. The third flow path 75 is understood as a suction flow path of the blowing fan 480, and may extend in the front-rear direction. Air flowing through the third flow path 75 may flow in the axial direction of the blower fan 480.

The air flow paths 71, 73, 75, and 77 include a fourth flow path 77 extending from the blowing fan 480 toward the discharge part 109. The fourth flow path 77 is understood as a discharge flow path of the blowing fan 480, and may extend in the vertical direction. In addition, the fourth flow path 77 may be formed in a space in which the blowing fan 480 is installed, that is, in a space formed by the fan housing 410 and the housing cover 430. The air flowing through the fourth flow path 77 may be discharged upward through the discharge unit 109.

Figure 5 is an exploded perspective view showing a blower fan and its surrounding configuration according to an embodiment of the present invention, Figure 6 is a perspective view showing the configuration of a blower fan according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention Is a perspective view showing the front configuration of the housing cover according to the present invention.

5 to 7, the fan assembly according to the embodiment of the present invention, the fan housing 410 and the housing cover 430 defining the installation space of the blowing fan 480 and the blowing fan 480 is Included.

The blowing fan 480 may include a centrifugal fan that sucks air in the axial direction and discharges it in the radial direction. For example, the centrifugal fan may include a multi-fan or a sirocco fan.

The blowing fan 480 may have a cylindrical shape as a whole. In detail, the blower fan 480 includes a main plate 481 to which the plurality of blades 483 are coupled, and a hub 482 protruding forward and provided at the center of the main plate 481. The motor shaft of the fan motor 490 may be coupled to the hub 482. The plurality of blades 483 may be spaced apart from each other in the circumferential direction of the main plate 481.

The blower fan 480 further includes a side plate portion 485 provided at the front of the plurality of blades 483. The side plate portion 485 performs a function of fixing the plurality of blades 483. Rear ends of the plurality of blades 483 may be coupled to the main plate 481, and front ends thereof may be coupled to the side plate portion 485.

The fan motor 490 is disposed in front of the blowing fan 480. The fan motor 490 may be supported by the motor support part 412 of the fan housing 410. The motor support part 412 may be positioned at an approximately center portion of the fan housing 410 and may be recessed forward from the rear surface of the fan housing 410 to allow the front surface of the fan motor 490 to be seated. In addition, the fan suction part 415 may be formed outside the motor support part 412.

The motor cover 492 and the locking unit 494 may be coupled to the rear of the fan motor 490. The locking unit 494 is coupled to the motor shaft of the fan motor 490 and disposed in front of the hub 481 to guide the fan motor 490 to be fixed to the blowing fan 480.

The housing cover 430, the cover body 431 for shielding the rear of the blowing fan 480 and protrudes forward from the cover body 431 to guide the flow of air passing through the blowing fan 480 The scroll unit 433 is included. The scroll unit 433 may have a circular shape along the outer shape of the blowing fan 480.

Discharge guide parts 433a and 433c are further included on both sides of the scroll part 433 to extend upward from the scroll part 433 to guide the flow of air discharged from the blower fan 480.

In the discharge guide portions 433a and 433c, a first discharge guide portion 433a extending upward from one side portion of the scroll portion 433 and a second portion extending upward from the other side portion of the scroll portion 433. The discharge guide part 433c is included. The first discharge guide part 433a and the second discharge guide part 433c may include a flat surface.

A discharge passage 433b may be formed between the discharge guide portions 433a and 433c on both sides. The discharge passage 433b is configured such that the width of the passage increases toward the upper portion, and the air flows smoothly through the discharge passage 433b.

An upper portion of the housing cover 430 is provided with a discharge support part 438 to which the discharge grill 109a provided in the discharge part 109 is coupled. The discharge support 438 constitutes a flat surface for stable mounting of the discharge grill 109a.

8 is a front view of a housing cover in which the inside of the blower fan according to the embodiment of the present invention is shown, and FIG. 9 is a perspective view showing the configuration of the discharge guide part of the housing cover according to the embodiment of the present invention, and FIG. Figure 11 is a side view showing the configuration of the blower fan and the discharge guide portion according to an embodiment of the present invention, Figure 11 is a plan view showing the configuration of the blower fan and the discharge guide portion according to an embodiment of the present invention, Figure 12 is XII-XII 'of FIG. Sectional section cut along the.

8 to 12, a fan assembly according to an embodiment of the present invention includes a fan housing 410 and a housing cover 430 that define an installation space of the blower fan 480 and the blower fan 480. The housing cover 430 may include a cover body 431 and a scroll portion 433.

The fan housing 410 and the housing cover 430 together may be referred to as a scroll housing. That is, the blowing fan 480 may be disposed in the scroll housing. The blowing fan 480 may rotate about a rotation axis. The rotating shaft of the blowing fan 480 may be formed long in the front and rear direction.

The blowing fan 480 may include a main plate 481 and a plurality of blades 483 disposed on one surface of the main plate 481. In addition, the blowing fan 480 may include a hub 482 protruding from the central portion of the one surface of the main plate 481. The motor shaft of the fan motor 490 may be coupled to the hub 482.

The main plate 481 may have a substantially disc shape. The one surface of the main plate 481 may mean the front surface of the main plate 481, and the hub 482 may protrude forward.

In addition, the plurality of blades 483 may be spaced apart from each other in the circumferential direction of the main plate 481 of the main plate 481. One end of the plurality of blades 483 may be fixed to the main plate 481, and the other end may be fixed to the side plate portion 485. The one end may mean a rear end of the blade 483, and the other end may mean a front end of the blade 483.

The cover body 431 may cover the main plate 431 of the blowing fan 480. In more detail, a plurality of blades 483 may be disposed on one surface of the main plate 431, and the other surface opposite to the one surface may be covered by the cover body 431. That is, the cover body 431 may be disposed behind the blowing fan 480, and the cover body 431 may form a rear surface of the fan assembly.

The fan housing 410 (see FIG. 5) may be spaced apart from the cover body 431 with the blowing fan 480 therebetween. That is, the fan housing 410 may be disposed in front of the blowing fan 480.

The air sucked into the fan suction part 415 of the fan housing 410 may be sucked into the blower fan 480 in a direction parallel to the axis of rotation of the blower fan 480.

The scroll unit 433 may connect the cover body 431 and the fan housing 410. In more detail, the scroll unit 433 may connect the fan housing 410 and the cover body 431 spaced apart in the front-rear direction with the blowing fan 480 therebetween. The scroll unit 433 may have a scroll shape in which the distance from the outer circumference of the blower fan 480 is gradually separated from the cutoff 510 along the flow direction of the air.

In detail, the cut-off 510 forms a boundary portion that is switched from the scroll portion 433 to the first discharge guide portion 433a, and moves outward from the scroll portion 433 to the blowing fan 480. It may be configured to extend to be bent or rounded. The first discharge guide part 433a may extend in a direction away from the blowing fan 480 from the cut off.

Due to the shape of the cut-off 510, the air flow may be concentrated or collided at the cut-off 510. And, due to the phenomenon of concentration or collision of the air flow, the noise tends to increase.

Between the inner circumference of the scroll portion 433 and the outer circumference of the blowing fan 480, a fan flow path 530 through which air discharged in the radial direction from the blowing fan 480 flows is formed, and the blowing fan 480 The cross-sectional area of the flow path of the fan flow path 530 may be configured to increase gradually along the direction of rotation. That is, the distance between the inner circumference of the scroll unit 433 and the outer circumference of the blowing fan 480 may gradually move away along the rotation direction of the blowing fan 480.

The distance between the inner circumference of the scroll unit 433 and the outer circumference of the blowing fan 480 may be referred to as an inner width of the fan flow path. Based on the direction in which air flows from the cutoff 500, that is, the clockwise direction of FIG. 8, the inner width cf1 of the upstream fan channel 530 is larger than the inner width cf2 of the downstream fan channel 530. It may be narrowly formed.

The fan assembly may further include a first discharge guide portion 433a and a second discharge guide portion 433c. Each discharge guide part 433a and 433c may connect the cover body 431 to the fan housing 410.

The first discharge guide portion 433a may extend from the cutoff 500 provided at one side of the scroll portion 433, and the second discharge guide portion 433c may extend from the other side of the scroll portion 433. have. In more detail, the first discharge guide portion 433a and the second discharge guide portion 433c may extend in a direction away from the blowing fan 480, for example, substantially upward.

A discharge passage 433b may be formed between the first discharge guide portion 433a and the second discharge guide portion 433c. The discharge passage 433b may be in communication with the fan passage 530.

The first discharge guide portion 433a and the second discharge guide portion 433c may be configured to move away from each other along the flow direction of air. Therefore, the flow cross section of the discharge passage 433b may gradually increase along the flow direction of the air.

The cut off 510 may be positioned between one side end of the scroll portion 433 and the first discharge guide portion 433a and may be formed to protrude toward the discharge passage 433b.

The cut off 510 may be spaced apart from the outer circumference of the blowing fan 480 to form a gap. If the gap is too large, a back flow may occur in which a part of the air flowing from the fan flow path 530 to the discharge flow path 433b is re-sucked into the gap, and this is caused by the blowing fan 480. Can cause performance degradation. On the contrary, when the gap is too small, the flow pressure may be concentrated at the end of the cutoff 510 to increase the noise. Thus, the gap is preferably adjusted appropriately.

For example, the minimum distance d1 between the cutoff 510 and, more specifically, the first connector 512 and the outer circumference of the blowing fan 480 may be equal to 8 of the diameter D of the blowing fan 480. It is desirable to be at least 10%. The minimum distance d1 between the first connector 502 and the outer circumference of the blower fan 480 may be referred to as a cutoff gap.

The cutoff 510 may be formed not only round in the first direction but also at least partially round in the second direction. This is to reduce noise generated when some of the air flowing from the fan channel 530 to the discharge channel 433b strikes the end of the cutoff 510.

Hereinafter, the configuration of the cut off 510 will be described in more detail.

The cut off 510 may include a first connection part 512 connecting the outline 511 to the scroll part 433, and a second connection part connecting the outline 501 to the first discharge guide part 433a ( 513). The outline 511 may mean an end portion of the cut off 510, and more specifically, may refer to an outline of a portion of the cut off 510 that protrudes most in the direction of a discharge flow path 433b. have.

At least a part of the outline 511 of the cut off 510 may be formed to be at least partially rounded in the second direction. That is, the outline 511 may extend roundly in three dimensions. For example, in a three-dimensional space defined by x, y, z axes, the first direction is a direction extending along a plane formed by the x, y axis, and the second direction is along a plane formed by the y, z axis. It may be in an extending direction.

The flow rate of air that strikes the outline 511 of the cutoff 510 may vary depending on the position in the second direction. In one example, the flow rate of air at a point adjacent to the cover body 431 may be slower than the flow rate of air at a point adjacent to the fan housing 410. Outline 511 of the cut-off 510 of the fan assembly according to an embodiment of the present invention may be formed to correspond to the flow rate distribution for each position.

In detail, referring to FIG. 10, the outline 511 of the cut-off 510 may include a linear portion 514 obliquely connected to the cover body 431 and an extension portion 514 extending from the linear portion 514 to the fan housing. The round part 515 may be included.

The linear part 104 may be elongated in a direction oblique to the second direction. An angle α1 formed between the linear portion 514 and the cover body 431 may be an obtuse angle. On the other hand, the round part 515 may be rounded to have a predetermined curvature with respect to the second direction. The round part 515 may be formed convexly toward the fan housing 410.

The length H1 of the linear portion 514 in the second direction may be half of the distance H1 + H2 between the cover body 431 and the fan housing 410. In addition, the length H2 of the round part 515 in the second direction may be half of the distance H1 + H2 between the cover body 431 and the fan housing 410. That is, the distance H1 and the distance H2 may be the same. In addition, the distance H1 + H2 between the cover body 431 and the fan housing 410 may mean a length of the outline 511 in the second direction.

In more detail, a point forming the boundary between the linear portion 514 and the round portion 515 may be called an inflection point 516, and the distance between the cover body 431 and the inflection point 516 with respect to the second direction. H1 may be half of the distance H1 + H2 between the cover body 431 and the fan housing 410. Similarly, the distance H2 between the fan housing 510 and the inflection point 516 in the second direction may be half of the distance H1 + H2 between the cover body 431 and the fan housing 410. That is, with respect to the second direction, the distance H3 between the cover body 431 and the inflection point 516 may be equal to the distance H2 between the fan housing 410 and the inflection point 516.

On the other hand, the cut-off 510 may be formed round to the first direction, whereby the first discharge guide portion 433a may be formed extending in the opposite direction to one end of the scroll portion 433.

The cutoff 510 may have a maximum curvature in the outline 511 with respect to the first direction. In more detail, the curvature of the first connector 512 in the first direction and the curvature of the second connector 513 in the first direction may increase as the closer to the outline 501, respectively. Can converge.

The maximum curvature may be kept constant along the length direction of the outline 501. That is, the curvature in the first direction in the linear part 514 and the curvature in the first direction in the round part 515 may be the same.

Meanwhile, the first connector 512 and the second connector 513 may each include a three-dimensional curved surface. Here, the three-dimensional curved surface may mean a curved surface having a predetermined curvature with respect to the first direction and the second direction, and may also be called a free curved surface.

In the fan assembly according to the exemplary embodiment of the present invention, a device (hereinafter, referred to as a noise reduction device) for reducing the noise generated in the blowing fan 480 may be provided. For example, the noise generated by the blowing fan 480 may include noise generated by a frequency of air flow passing through the blade, that is, a blade pass frequency (BPF).

In particular, the BPF noise may be largely generated at the cutoff 510 described above. Because, in the cutoff 510, a collision may occur between the flow discharged from the blower fan 480 and the flow re-absorbed through the gap between the cutoff 510 and the blower fan 480, This is because concentration of pressure may be generated by the collision.

The noise reduction device includes a through hole 500 formed in the housing cover 430. The through hole 500 may be provided in plurality.

In detail, the plurality of through holes 500 may be formed in at least one of the cutoff 510 and the first discharge guide part 433a. For example, the plurality of through holes 500 may be formed in the cutoff 510 and the first discharge guide part 433a. The plurality of through holes 500 may be formed to penetrate at least a portion of the cutoff 510 and the first discharge guide part 433a.

Referring to FIG. 11, the blowing fan passes through a point P1 of the first connection portion 512, which forms a minimum distance d1 between the outer circumference of the blowing fan 480 and the cutoff 510. When defining a virtual circle C1 concentric with 480, the through hole 500 is discharged from the point P1 of the first connection part 512 past the second connection part 513 to the first discharge. It may be arranged toward the guide portion 433a.

That is, since one point P1 of the first connection part 512 is a point where noise generation starts to increase, the one point P1 forms one end of the plurality of through holes 500.

The size (diameter) of the plurality of through holes 500 is the same, and the spacing between the plurality of through holes 500 may also be constant. The flow passing through the cut off 510 or the first discharge guide part 433a may be transmitted to the outside of the fan assembly through the plurality of through holes 500.

On the back surface of the cut off 510 and the first discharge guide portion 433, a sound absorbing material 600 for absorbing or blocking the noise transmitted through the through hole 500 may be installed. The term “back side” is understood as an opposite surface of one surface of the cut-off 510 facing the discharge passage 433b and the first discharge guide portion 433. Therefore, the sound absorbing material 600 may not be exposed to the discharge passage 433b.

For example, the sound absorbing material 600 may include polyurethane foam or styrofoam. That is, the sound absorbing material 600 may be made of a porous material, at least a portion of the air flow of the air flow is transmitted to the sound absorbing material 600 through the through hole 500, the noise of the air flow is the sound absorbing material ( 600 may be absorbed.

The sound absorbing material 600 may have a predetermined thickness and may be provided on the rear surface of the cutoff 510 to cover the through hole 500. For example, the sound absorbing material 600 may be attached to the rear surface of the cut off 510. In detail, the sound absorbing material 600 may extend from the first connecting portion 512 to the second connecting portion 513 through the outline 511 and may be disposed to cover the through hole 500.

Among the noises generated in the vicinity of the cutoff 510, the noise of a specific frequency corresponding to the diameter of the through hole 500 and the gap between the plurality of through holes 500 may be reduced. And, by the sound absorbing material 600, the noise in the low frequency region can be reduced.

10: humidifying air cleaner 30: depression
100: cabinet 110 body
112: space 200: door assembly
210: door panel 220: receiving portion
226: air filter seating section 227: water tank seating
260: tank 270: bucket
280: air filter assembly 300: humidification filter assembly
400: housing assembly 410: fan housing
430: housing cover 450: total length
480: blowing fan 500: through-hole
510: cutoff 600: sound absorbing material

Claims (12)

A blowing fan having a main plate and a plurality of blades in a circumferential direction on the main plate;
A fan housing provided at one side of the blowing fan to form a fan suction part; And
A housing cover coupled to the fan housing and defining an installation space in which the blowing fan is installed together with the fan housing,
In the housing cover,
A cover body covering the main plate;
A scroll portion protruding from the cover body toward the fan housing and having a scroll shape in which a distance from an outer circumference of the blower fan is gradually distanced along a rotation direction of the blower fan;
A cut off having a shape bent from the scroll portion;
A first discharge guide part extending in a direction away from the blower fan from the cut off; And
And a plurality of through holes formed in at least one of the cut off and the discharge guide part. The method of claim 1,
The fan assembly further comprises a sound absorbing material covering the plurality of through holes. The method of claim 2,
In the sound absorbing material,
Fan assembly with polyurethane foam or styrofoam. The method of claim 2,
A second discharge guide part extending from the scroll part; And
And a discharge passage formed between the first and second discharge guide parts. The method of claim 4, wherein
The first and second discharge guide parts extend in a flat manner from both sides of the scroll part. The method of claim 4, wherein
The sound absorbing material,
The fan assembly installed on the opposite side of the cut-off or one surface of the first discharge guide portion facing the discharge passage. The method of claim 1,
In the cut off,
And an outline formed at an end of the cut off, the outline being at least one north rounded in a direction parallel to the rotation axis of the blower fan. The method of claim 7, wherein
The outline is,
A linear part connected obliquely to the cover body; And
And a round portion extending from the linear portion and connected to the fan housing. The method of claim 7, wherein
In the cut off,
A first connector connecting the outline with the scroll part; And
The fan assembly further comprises a second connecting portion for connecting the outline with the first discharge guide portion. A humidifier air purifier comprising the fan assembly according to any one of claims 1 to 9. cabinet;
A door assembly removably coupled to the cabinet;
An air filter assembly installed in the door assembly;
A humidifying filter assembly disposed at an outlet side of the air filter assembly; And
A fan assembly disposed at an outlet side of the humidification filter assembly,
The fan assembly,
A blower fan having a main plate and a plurality of blades provided in the circumferential direction and sucking air in the axial direction and discharging the air in a radial direction;
A cover body covering the blowing fan;
A scroll portion protruding from the cover body and having a scroll shape;
A cut off bending or extending from the scroll portion and having a plurality of apertures; And
A humidifier air cleaner provided in the cut-off, and includes a sound absorbing material covering the plurality of through holes. The method of claim 11,
First and second discharge guide parts extending from both sides of the scroll part; And
A discharge flow path is further formed between the first and second discharge guide parts.
And the first discharge guide part extends in a direction away from the blower fan from the cut off.