WO2024122769A1

WO2024122769A1 - Ventilation apparatus

Info

Publication number: WO2024122769A1
Application number: PCT/KR2023/007419
Authority: WO
Inventors: 나카가와스구루; 모리케이타; 사나다요헤이
Original assignee: 삼성전자 주식회사
Priority date: 2022-12-05
Filing date: 2023-05-31
Publication date: 2024-06-13

Abstract

The disclosed ventilation apparatus has a suction port through which air is suctioned and a plurality of discharge ports through which the air is discharged. The plurality of discharge ports are discontinuously provided in the circumferential direction around the suction port. The air suctioned through the suction port is guided to the plurality of discharge ports by means of a discharge path. The discharge port has an inner region at the suction port side and an outer region at the side opposite to that of the suction port. The discharge port is formed such that the outer region is positioned higher than the inner region.

Description

ventilation device

This disclosure relates to ventilation devices.

Electric cookers generate a relatively weak upward air current compared to gas cookers. Therefore, cooking fumes, such as soot, generated during cooking may spread to the surroundings without reaching the ventilation device. Soot can contaminate the indoor environment where electric cookers are installed. In order to suppress the spread of soot, increasing the air volume of the ventilation device may be considered, but in this case, noise or vibration may increase, causing discomfort to the user.

Japanese Patent Application Laid-Open No. 11-281108 discloses a local ventilation device that locally ventilates the area around the source of soot. This local ventilation device discharges air obliquely downward from a plurality of outlets arranged along the outer circumference, and generates a swirling airflow by sucking in air from an intake port installed inside the plurality of outlets.

A ventilation device according to one aspect of the present disclosure includes an intake port through which air is sucked, and a plurality of outlets through which air is discharged. A plurality of discharge ports are intermittently installed along the circumferential direction around the suction port. The air sucked through the intake port is guided to the plurality of outlets by the discharge passage. The outlet has an inner region facing the intake port and an outer region opposite the intake port. The outlet is formed so that the outer region is located higher than the inner region.

1 is a schematic cross-sectional view of a ventilation device according to an embodiment of the present disclosure.

FIG. 2 is a schematic bottom view of a ventilation device according to an embodiment of the present disclosure shown in FIG. 1.

FIG. 3 is a schematic bottom view of an outlet of the ventilation device according to an embodiment of the present disclosure shown in FIG. 1.

FIG. 4 is a schematic cross-sectional view of an outlet of the ventilation device according to an embodiment of the present disclosure shown in FIG. 1.

FIG. 5 is a schematic side view showing the discharge flow path of the ventilation device according to an embodiment of the present disclosure shown in FIG. 1.

Figure 6 is a table showing the results of observing the generation state of the swirling airflow while changing the first angle (θ1), the second angle (θ2), and the third angle (θ3).

Figure 7 is a diagram showing an example of a stable swirling airflow.

Figure 8 shows the swirling airflow by a conventional ventilation device.

The various embodiments of this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various changes, equivalents, or replacements of the embodiments.

In connection with the description of the drawings, similar reference numbers may be used for similar or related components.

The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise.

As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof.

The term “and/or” includes any element of a plurality of related described elements or a combination of a plurality of related described elements.

Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one element from another, and may be used to distinguish such elements in other respects, such as importance or order) is not limited.

One (e.g. first) component is said to be "coupled" or "connected" to another (e.g. second) component, with or without the terms "functionally" or "communicatively". Where mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

Terms such as “include” or “have” are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in this document, but do not include one or more other features, numbers, or steps. , does not exclude in advance the possibility of the existence or addition of operations, components, parts, or combinations thereof.

When a component is said to be “connected,” “coupled,” “supported,” or “in contact” with another component, this means not only when the components are directly connected, coupled, supported, or in contact, but also when a third component This includes cases where it is indirectly connected, coupled, supported, or contacted through.

When a component is said to be located “on” another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

The present disclosure provides a ventilation device that can improve local ventilation performance by stabilizing swirling airflow. The ventilation device of the present disclosure is installed, for example, above an electric heating cooker to locally ventilate the area around the source of cooking fumes, for example, soot. The ventilation device of the present disclosure is not necessarily limited to the upper part of the electric heating cooker and can be placed in various places. Hereinafter, embodiments of the ventilation device of the present disclosure will be described with reference to the drawings.

1 is a schematic cross-sectional view of a ventilation device 100 according to an embodiment of the present disclosure. FIG. 2 is a schematic bottom view of the ventilation device 100 according to an embodiment of the present disclosure shown in FIG. 1. FIG. 3 is a schematic bottom view of the outlet P of the ventilation device 100 according to an embodiment of the present disclosure shown in FIG. 1. FIG. 4 is a schematic cross-sectional view of the outlet P of the ventilation device 100 according to an embodiment of the present disclosure shown in FIG. 1. FIG. 5 is a schematic side view showing the discharge passage L2 of the ventilation device 100 according to an embodiment of the present disclosure shown in FIG. 1.

1 to 5, the ventilation device 100 according to one embodiment includes an intake port (Q) through which air is sucked, a plurality of outlets (P) through which air is discharged, and air sucked through the intake port (Q). A discharge flow path (L2) that guides air to a plurality of discharge ports (P) may be provided. A plurality of outlets (P) may be installed intermittently along the circumferential direction of the main body (10). The discharge port (P) may be formed so that the outer region (Y) is located higher than the inner region (X) toward the intake port (Q).

First, referring to FIGS. 1 and 2, an inlet (Q) and an outlet (P) are provided in the main body 10. A fan 20 is disposed inside the main body 10 to suck in air through an intake port (Q) and discharge the sucked air through an outlet (P). In order to exert a local ventilation function, the intake port (Q) may be placed inside the plurality of outlets (P). A swirling airflow can be generated by discharging air diagonally downward from the plurality of outlets (P) in the radial and circumferential directions while sucking air into the suction port (Q) installed inside the plurality of outlets (P).

Referring to Figure 2, for example, a circular suction port Q is provided in the central part of the main body 10. The shape of the intake port (Q) is not limited to circular, and may be of various shapes, such as rectangular. A plurality of discharge ports (P), for example, rectangular in shape, may be arranged along the circumferential direction, for example, at equal intervals, and spaced apart from each other around the intake port (Q). The shape of the outlet (P) is not limited to a rectangle. It can be of various shapes, such as circular shapes. The arrangement spacing of the plurality of outlets (P) does not necessarily have to be equally spaced. For example, multiple outlets (P) may be arranged according to predetermined rules.

Referring to FIG. 1, a suction flow path (L1) connected from the suction port (Q) to the fan 20 is provided inside the main body 10. In this embodiment, the fan 20 is disposed above the suction port Q, and the suction flow path L1 extends upward from the suction port Q. The suction flow path (L1) may include an upstream flow path element (L11) and a downstream flow path element (L12). The upstream flow path element L11 may have a cross-sectional area that gradually decreases toward the downstream side. The downstream flow path element (L12) connects the upstream flow path element (L11) and the fan (20). Illustratively, the suction flow path (L1) includes an upstream flow path element (L11) whose diameter gradually decreases toward the downstream side from the suction port (Q), an upstream opening in communication with the upstream flow path element (L11), and a downstream opening. It may be provided with, for example, a cylindrical downstream flow path element L12 in communication with the fan 20. A filter 30 through which air sucked from the intake port Q passes may be installed in the downstream flow path element L12. The filter 30 can filter out foreign substances such as dust, soot, and odor-causing substances from the sucked air.

Inside the main body 10, a plurality of discharge passages L2 are provided. A plurality of discharge passages L2 are formed around the suction passage L1. A plurality of discharge passages (L2) connect the fan 20 and a plurality of discharge ports (P).

Illustratively, the main body 10 includes an upstream part 10-1 provided with an inlet Q and an upstream flow path element L11, and a downstream part 10-2 provided with a downstream flow path element L12. may include. The upstream portion 10-1 may be, for example, a truncated cone-shaped cylinder whose inner diameter gradually decreases upward. The downstream portion 10-2 may have a cylindrical shape in which the upstream opening communicates with the upstream portion 10-1 and the downstream opening communicates with the fan 20. The upstream flow path element L11 of the suction flow path L1 is defined by the inner area of the upstream part 10-1, and the downstream part of the suction flow path L1 is defined by the inner area of the downstream part 10-2. A side flow path element L12 may be defined. A plurality of discharge passages L2 may be provided in the downstream portion 10-2 and the upstream portion 10-1. A plurality of discharge ports (P), which are exits of the plurality of discharge passages (L2), are provided at the lower end of the upstream portion (10-1) surrounding the suction port (Q). Therefore, a plurality of discharge passages (L2) are arranged to surround the suction passage (L1) with the inner walls of the upstream portion (10-1) and the downstream portion (10-1) interposed, and a plurality of discharge openings (P) Can be arranged to surround the intake port (Q).

The fan 20 can intake air from the bottom and exhaust air from the side. The fan 20 may be, for example, a centrifugal blower such as a turbo fan or sirocco fan, or a diagonal flow blower.

The plurality of discharge passages L2 each guide the air discharged from the fan 20 to the plurality of discharge ports P while changing the flow direction. At least a portion of the discharge passage L2, for example, the portion L2a provided in the upstream portion 10-1, may be inclined outward in the radial direction and twisted in the circumferential direction to be connected to a plurality of discharge ports P. . For example, as shown in FIG. 1, the downstream portion of each discharge passage L2, for example, the portion L2a provided in the upstream portion 10-1, is inclined outward in the radial direction at an angle. It may extend downward with a (second angle θ2). In addition, in order to allow the discharge airflow to rotate, as shown in FIG. 5, at least the downstream portion of each discharge passage L2, for example, the portion L2a provided in the upstream portion 10-1, is rotated in the circumferential direction. It may extend obliquely downward with a twist angle (first angle θ1). Here, “radial direction” means the radial direction of the intake port Q, and “extends diagonally downward and outward in the radial direction” means extends obliquely downward outward with respect to the radial direction. Also, here, “circumferential direction” means the circumferential direction of the intake port (Q), and “extending diagonally downward in the circumferential direction” means extending downward while twisting in the circumferential direction. As shown in FIGS. 1 and 2 , the plurality of discharge passages L2 are separated from each other by partition walls 40 and are respectively connected to the plurality of discharge ports P. A plurality of discharge ports (P) may be arranged around the suction port (Q), for example, to be spaced apart from each other at an angle (third angle θ3). In other words, each gap (third angle θ3) is the angle formed by two straight lines connecting the centers of two neighboring outlets (P) and intake ports (Q).

Referring to Figures 3 and 4, the outlet (P), as shown in Figures 3 and 4, the outer area (Y) opposite to the inlet (Q) is located higher than the inner area (X) closer to the inlet (Q). It can be formed to do so. From the viewpoint of the flow direction of the exhaust air discharged from the outlet (P), the outer area (Y) may be located further upstream than the inner area (X).

As shown in FIG. 3, the inner area It's an area. In other words, the inner area This is an area including the downstream end of the portion on the inlet (Q) side. For example, when the outlet P is rectangular in shape, the inner area As, it is an area including the inner part (A). Accordingly, the inner portion (A) of the outlet (P) may be referred to as the downstream end (A) of the inner wall (I) of the discharge passage (L2). The outer area (Y) of the outlet (P) includes the outer part (B) furthest from the intake port (Q) among the edges of the outlet (P) in the bottom view of the main body 10, as shown in FIG. It's an area. In other words, the outer area Y of the discharge port P is one of the wall surfaces forming the discharge passage L2 in the longitudinal section of the main body 10 passing through the center of the suction port Q, as shown in FIG. It is an area including the downstream end of the portion opposite to the inlet (Q). For example, when the outlet (P) has a rectangular shape, the outer area (Y) is an area near the downstream edge of the outer wall (O), which is the wall farthest from the inlet (Q) among the walls forming the discharge passage (L2). As, it is an area including the outer part (B). Accordingly, the outer portion (B) of the outlet (P) may be referred to as the downstream end (B) of the outer wall (O) of the discharge passage (L2).

That is, according to the discharge port (P) according to an embodiment of the present disclosure, the outer portion (B) furthest from the suction port (Q) is located higher than the inner portion (A) closest to the suction port (Q). In other words, among the walls forming the discharge passage L2, the downstream end B of the outer wall O is located higher than the downstream end A of the inner wall I. From the viewpoint of the flow direction of the discharge air discharged from the discharge port P, the inner portion A of the discharge port P (that is, the downstream end A of the inner wall surface I of the discharge passage L2) The more outer portion B (in other words, the downstream end B of the outer wall O of the discharge passage L2) is located further upstream.

According to this configuration, the length of the outer wall O among the walls forming the discharge passage L2 is relatively shorter than in the related art. Accordingly, the Coanda effect or centrifugal force acting on the air passing near the outer wall O is relatively reduced, and the generation of a vortex on the outside in the radial direction based on the discharge airflow from the outlet P can be suppressed. As a result, the exhaust airflow from the outlet P can be discharged at a target angle, thereby forming a stable swirling airflow, and further improving local ventilation performance.

Referring to FIG. 4, the outlet P is upward with respect to the horizontal surface H1 including the inner area It may be formed obliquely (towards the upstream side in terms of the flow direction of the exhaust air stream). Illustratively, the discharge port (P) may be formed to be inclined toward the upstream side of the discharge passage (L2) with respect to the horizontal surface (H1). The discharge port P includes an inner area ) can be arranged between. Since the discharge flow path (L2) is twisted in the circumferential direction and extends from top to bottom, the virtual surface (H2) is the vector (V) passing through the discharge port (P) in the vector indicating the direction in which the discharge flow path (L2) extends. perpendicular to the direction. The outlet P may be provided on the virtual surface H2.

The outlet P according to an embodiment of the present disclosure is provided on the virtual surface H2. That is, the discharge port (P) is formed orthogonal to the discharge passage (L2). Specifically, since the discharge passage L2 extends while twisting in the circumferential direction from the top to the bottom, in the vector indicating the direction in which the discharge passage L2 extends, the vector V passing through the discharge port P The direction and outlet (P) are perpendicular to each other.

Among the walls forming the discharge passage (L2), the Coanda effect or centrifugal force may be reduced as the length of the outer wall (O) is shortened, but if the length of the inner wall (I) is longer than the outer wall (O), the inner wall ( The Coanda effect or centrifugal force acting on the air passing through I) may become relatively large, causing a vortex to be generated inside in the diametric direction based on the discharge airflow from the outlet (P). If the discharge port (P) is located between the horizontal plane (H1) and the virtual plane (H2), the generation of vortices both inside and outside with respect to the discharge passage (L2) can be suppressed, and a stable swirling air flow can be formed. You can. In addition, when the outlet (P) is located on the virtual surface (H2), the bias in the speed distribution of the airflow discharged from the outlet (P) is suppressed, and the discharged airflow can be stably discharged at the target angle, thereby improving local ventilation performance. This can be improved.

Figure 6 is a table showing the results of observing the generation state of the swirling airflow while changing the first angle (θ1), the second angle (θ2), and the third angle (θ3). As shown in FIG. 5, the first angle θ1 is a twist angle in the circumferential direction of the discharge passage L2, and is an angle formed by the twist direction of the discharge passage L2 and the vertical direction. As shown in FIG. 1, the second angle θ2 is an inclination angle in the radial direction of the discharge passage L2, and is an angle formed by the inclination direction of the discharge passage L2 and the vertical direction. As shown in FIG. 2, the third angle θ3 is the angular spacing of the plurality of outlets (P), and is the two virtual angles connecting the centers of each of the two neighboring outlets (P) and the intake port (Q). It is the angle formed by the line.

In Figure 6, numerical values are used as indicators of the stability of the swirling airflow. The larger the number, the more stable the swirling airflow is generated. Specifically, “0” means “no swirling air currents are generated,” “1” means “vortexing air currents are occasionally generated,” “2” means “vortexing air currents are generated unstable,” and “3” means “ “The swirling air current is generated somewhat stably,” “4” means “the swirling air flow is generated stably,” and “5” means “the swirling air flow is generated very stably.” The numerical value representing the stability is a value derived based on the size of the swirling center of the swirling airflow, the generation time, and the generation frequency that can be measured by observing the generation state of the swirling airflow.

According to FIG. 6, in order to stably generate a swirling airflow to some extent, it may be desirable for the first angle θ1 to be 30°≤θ1≤50°, and for the second angle θ2, 15°≤θ2. ≤45° may be desirable. According to this configuration, the outer area (Y) is located above the inner area (X) of the discharge port (P), so that the length of the outer wall surface (O) of the discharge passage (L2) is relatively shorter than before, and the discharge airflow is reduced. Based on this, a ventilation device 100 capable of suppressing the generation of vortices on the inside and outside can be implemented. As a result, as shown in FIG. 7, the exhaust airflow is discharged at a target angle, thereby stabilizing the swirling airflow, and further improving local ventilation performance. In addition, by forming the discharge port P to be perpendicular to the discharge passage L2, the deviation of the velocity distribution 50 of the discharge passage L2 can be suppressed and local ventilation performance can be further improved.

Figure 8 shows a swirling airflow generated by a ventilation device according to a comparative example. Referring to FIG. 8, in the ventilation device according to the comparative example, a plurality of discharge passages 1 are formed in a direction extending outward and downward. That is, the plurality of discharge passages 1 are formed at an angle with respect to the vertical direction, for example. The downstream openings of the plurality of discharge passages 1, that is, the discharge ports 2 through which air is discharged, are formed in a horizontal direction. That is, the plane containing the outlet 2 is perpendicular to the vertical direction. According to this configuration, the swirling airflow may become unstable.

In detail, among the walls forming the discharge passage 1, the outer wall 1b is longer in the radial direction than the inner wall 1a, so COANDA acts on the air flowing along the discharge passage 1. The effect or centrifugal force becomes stronger in the outer area adjacent to the outer wall surface 1b than in the inner area adjacent to the inner wall surface 1a. Accordingly, the wind speed distribution 3 within the discharge passage 1 is biased toward the outside, and the speed difference between the air discharged from the outer area of the discharge passage 1 and the still air surrounding it increases, resulting in a strong shear force. As a result, a strong vortex 4 is generated outside the discharge passage 1. Since the discharge airflow from the discharge passage 1 is pulled outward by the vortex 4, the discharge airflow may deviate from the target angle, causing the swirling airflow to become unstable and further deteriorating local ventilation performance.

Next, with reference to FIG. 6, the point of the third angle θ3 will be described. If the inside and outside of the exhaust air stream are blocked by the exhaust air stream discharged from the outlet (P), the pressure inside the exhaust air stream becomes negative as air is sucked in through the intake port (Q), and the pressure difference between the inside and outside increases. . Then, the discharge airflow separating the inner and outer sides may become unstable, and as a result, the swirling airflow may also become unstable. In order to prevent the inside and outside from being completely blocked by the exhaust air flow, it is conceivable to widen the gap between the adjacent exhaust ports (P), but if this gap is widened too much, it may become difficult to generate a swirling air flow. In order to reconcile this trade-off relationship, referring to FIG. 6, it may be desirable for the third angle θ3 to be 12°≤θ3≤36°. According to this, it is possible to prevent the discharge airflow from becoming unstable and generate a stable swirling airflow. Exemplarily in the embodiment shown in FIGS. 1 to 5, the first angle θ1 is 45°, the second angle θ2 is 30°, and the third angle θ3 is 24°.

In addition, by installing the filter 30 in the suction flow path L1, foreign substances such as dust, soot, and odor-causing substances can be removed from locally sucked air, thereby maintaining an indoor environment.

The ventilation device 100 according to the present disclosure is not limited to the above-described embodiments. For example, in the above-described embodiments, the outlet P is formed perpendicular to the discharge passage L2 on the virtual surface H2, but the outlet P is formed at an angle with respect to the virtual surface H2. It could be. Additionally, the outlet P may be installed between the horizontal surface H1 and the virtual surface H2. For example, in the above-described embodiments, the downstream side of the discharge flow path L2 is linearly twisted in the circumferential direction and extends downward, but the discharge flow path L2 is twisted in the circumferential direction as a whole from the upstream side to the downstream side. It may also extend downward.

In addition, the ventilation device 100 does not necessarily need to return the sucked indoor air back to the room, and may exhaust the sucked indoor air to the outdoors.

The present disclosure provides a ventilation device with improved local ventilation performance by stabilizing swirling airflow.

A ventilation device according to one aspect of the present disclosure includes an intake port through which air is sucked; a plurality of outlets intermittently installed along the circumferential direction around the intake port through which air is discharged; and an discharge passage that guides the air sucked in through the intake port to the plurality of outlets, wherein the outlet is formed so that an outer area opposite the intake port is positioned higher than an inner region facing the intake port.

In one embodiment, the discharge passage may extend downward and slanted outward in the radial direction and be connected to the discharge port.

In one embodiment, the discharge passage may be twisted in the circumferential direction and extended downward to be connected to the discharge port.

In one embodiment, the outlet may be located between a horizontal plane including the inner region and an imaginary plane including the inner region and perpendicular to the discharge flow path.

In one embodiment, the outlet may be located on an imaginary plane that includes the inner region and is perpendicular to the outlet flow path.

As an example, when the angle formed between the direction in which the discharge passage is twisted in the circumferential direction and extending downward and the vertical direction is θ1, it may be 30°≤θ1≤60°.

As an example, when the angle formed between the direction in which the discharge passage extends obliquely downward in the radial direction and the vertical direction is θ2, it may be 15°≤θ2≤45°.

As an example, when the angular gap between two adjacent outlets is θ3, it may be 12°≤θ3≤36°.

In one embodiment, the ventilation device includes a cylindrical body provided with the intake port, the discharge passage, and the plurality of discharge ports; It may include a fan disposed between the intake port and the discharge passage inside the main body to suck air through the intake port and supply it to the discharge passage.

In one embodiment, a suction flow path connecting the suction port and the fan may be provided inside the main body.

In one embodiment, the discharge passage may be arranged around the suction passage.

In one embodiment, the suction flow path may include an upstream flow path element whose cross-sectional area decreases as it goes downstream from the suction port, and a downstream flow path element connecting the upstream element and the fan.

The main body may include an upstream part provided with the inlet and the upstream flow path element, and a downstream part provided with the downstream flow path element. The discharge flow path may be provided in the upstream portion and the downstream portion. The plurality of outlets may be provided in the upstream portion.

In one embodiment, a portion provided at least in the upstream portion of the discharge passage may be inclined outward in the radial direction and twisted in the circumferential direction to be connected to the plurality of discharge ports.

In one embodiment, the ventilation device may include a filter disposed between the intake port and the outlet port to filter out foreign substances from the sucked air.

The ventilation device according to the aspect of the present disclosure discharges air diagonally downward in the radial direction from a plurality of outlets (P) installed intermittently along the circumferential direction, while sucking in air from an intake port (Q) installed inside the plurality of outlets. As a ventilation device that generates a swirling airflow, the outer region (Y) on the opposite side of the outlet is located higher than the inner region (X) on the inlet side of the outlet.

As an example, the ventilation device may include a discharge passage L2 that extends diagonally downward in the radial direction and is connected to the plurality of discharge ports. The plurality of discharge ports may be installed between or on a horizontal surface H1 including the inner region and a virtual surface H2 including the inner region and orthogonal to the discharge passage.

In one embodiment, the outlet may be installed on the virtual surface.

In one embodiment, the discharge flow path extends diagonally downward in the circumferential direction, and an angle (θ1) formed between the direction diagonally downward in the circumferential direction and the vertical direction may be 30°≤θ1≤60°.

As an example, the angle θ2 formed between the direction diagonally downward in the radial direction of the discharge passage and the vertical direction may be 15°≤θ2≤45°.

As an example, the angle θ3 formed between each of the two adjacent outlets and an imaginary line connecting the intake port may be 12°≤θ3≤36°.

In one embodiment, the ventilation device may further include a filter through which air sucked in from the intake port passes.

As described above, although the ventilation device of the present disclosure has been described with limited examples and drawings, various modifications and variations can be made by those skilled in the art from the above description.

Claims

Inlet (Q) where air is sucked in;

A plurality of outlets (P) installed intermittently along the circumferential direction around the intake port and through which air is discharged;

It includes a discharge passage (L2) that guides the air sucked through the intake port to the plurality of discharge ports,

The ventilator is formed so that the outer area (Y), which is opposite to the inlet, is positioned higher than the inner area (X), which is towards the inlet.
According to paragraph 1,

A ventilation device wherein the discharge flow path extends downward to be inclined outward in the diametric direction and is connected to the discharge port.
According to claim 1 or 2,

A ventilation device in which the discharge passage is twisted in the circumferential direction and extended downward and connected to the discharge port.
According to any one of claims 1 to 3,

The ventilating device is located between a horizontal surface (H1) including the inner region and an imaginary surface (H2) including the inner region and perpendicular to the discharge flow path.
According to any one of claims 1 to 3,

The ventilator is located on an imaginary surface (H2) that includes the inner region and is perpendicular to the discharge flow path.
According to any one of claims 1 to 5,

When the angle formed between the direction in which the discharge passage is twisted in the circumferential direction and extending downward and the vertical direction is θ1, the ventilation device is 30°≤θ1≤60°.
According to any one of claims 1 to 6,

When the angle formed between the direction in which the discharge passage extends obliquely downward in the radial direction and the vertical direction is θ2, the ventilation device is 15°≤θ2≤45°.
According to any one of claims 1 to 7,

When the angular gap between two adjacent outlets is θ3, a ventilation device of 12°≤θ3≤36°.
According to any one of claims 1 to 8,

A cylindrical body (10) provided with the intake port, the discharge passage, and the plurality of discharge ports;

A ventilation device including a fan (20) disposed between the intake port and the discharge passage inside the main body to suck air through the intake port and supply it to the discharge passage.
According to clause 9,

A ventilation device provided with a suction flow path (L1) inside the main body that connects the suction inlet and the fan.
According to clause 10,

A ventilation device wherein the discharge flow path is disposed around the suction flow path.
The method of claim 10 or 11,

The suction flow path includes an upstream flow path element (L11) whose cross-sectional area decreases toward the downstream side from the suction port, and a downstream flow path element (L12) connecting the upstream element and the fan.
According to clause 12,

The main body includes an upstream part (10-1) provided with the inlet and the upstream flow path element, and a downstream part (10-2) provided with the downstream flow path element,

The discharge flow path is provided in the upstream portion and the downstream portion,

A ventilation device in which the plurality of outlets are provided in the upstream portion.
According to clause 13,

A ventilation device wherein a portion provided at least in the upstream portion of the discharge passage is inclined outward in the radial direction and twisted in the circumferential direction and connected to the plurality of discharge ports.
According to any one of claims 1 to 8,

A ventilation device including a filter (30) disposed between the intake port and the discharge port to filter out foreign substances from the sucked air.