KR20240042717A - Motor housing assembly having ventilation hole and air purifier including same - Google Patents

Abstract

The present invention is a motor housing assembly built into an air purifier, which provides an accommodating space for a motor that operates a fan module to be built in, wherein a drive shaft hole is formed so that the drive shaft of the motor penetrates the outside, and at least one side has a space through which fluid enters and exits. A main body module in which a ventilation hole is formed; and at least one fixed rib module extending radially from the outer surface of the main body module and coupled to the air purifier main body; It is intended to provide a motor housing assembly in which the inner surface of the main body module is spaced apart from the motor body accommodated therein by a preset distance, thereby forming a flow space for fluid entering and leaving the ventilation hole.

Description

Motor housing assembly with ventilation hole and air purifier including the same {MOTOR HOUSING ASSEMBLY HAVING VENTILATION HOLE AND AIR PURIFIER INCLUDING SAME}

The present invention relates to a motor housing assembly provided with a ventilation hole and an air purifier including the same, and to a motor housing assembly in which a motor that operates a fan of the air purifier is accommodated therein.

Recently, as social interest in fine dust gradually increases, the use of air purifiers is gradually increasing.

In general, an air purifier is a device that sucks in polluted indoor air and purifies it into clean air by filtering out dust and odor particles contained in the air. These air purifiers can purify indoor air by sucking in and purifying the surrounding polluted air and then discharging the purified clean air to the outside of the air purifier.

Air purifiers can be classified into mechanical, electric, and combined types depending on the purification method. The mechanical type is called the fan method, which refers to a method of sucking air through a fan and purifying the air through dust collection/deodorization/antibacterial filters, etc.

This fan method always faces the problem of heat dissipation from the driving means (motor) that drives the fan. The output of the air purifier is controlled by the user's operation or the pollution level of the space in which it is located, but it is often operated continuously for a long time. In an air purifier, the driving means is not a component that is scheduled to be replaced like a filter, so if the driving means is damaged due to overheating, it will inevitably cause great inconvenience to the user.

As a prior art, 'Air Purifier', Korean Patent Publication No. 10-2021-0131613, is disclosed. The prior art discloses a structure for dissipating heat using a heat exchanger including a heat dissipation fin and a heat dissipation pipe. However, since heat dissipation fins and heat dissipation pipes are an indirect heat exchange method, their efficiency is not very high, and they have to be designed in a relatively complex and elaborate configuration, so there is a problem in that the manufacturing cost is high.

Korean Patent Publication No. 10-2021-0131613 (Air Purifier)

The motor housing assembly and air purifier according to one disclosure of the present invention seeks to improve user safety by preventing overheating of the driving means in a simple manner by proposing a base frame and a cover frame formed in a specific structure.

In addition, the motor housing assembly and air purifier according to one disclosure of the present invention seeks to maximize the heat dissipation effect by proposing a fixed rib module formed in a specific structure.

In an air purifier including a motor housing assembly according to an embodiment of the present invention, the motor housing assembly provides an accommodation space to accommodate a motor that operates the fan module, and has a drive shaft hole so that the drive shaft of the motor penetrates to the outside. a main body module, wherein at least one side is formed with a ventilation hole through which fluid flows in and out; and at least one fixed rib module extending from the outer surface of the main body module and coupled to the air purifier main body. It is intended to provide an air purifier in which the inner surface of the main body module is spaced apart from the motor body accommodated therein by a preset distance, thereby forming a flow space for fluid entering and leaving the ventilation hole.

Alternatively, the main body module may include a base frame having a housing structure with one side open, and a plurality of first ventilation holes formed on the side at preset intervals; and a cover frame that covers the one surface and has a second ventilation hole. We would like to provide an air purifier that includes.

Alternatively, the one surface is a surface perpendicular to an imaginary extension line of the drive shaft, the base frame has a cylindrical shape with the one surface open, and the plurality of first ventilation holes are formed to be spaced apart in the circumferential direction, We would like to provide a purifier.

Alternatively, the object is to provide an air purifier in which the plurality of first ventilation holes are spaced apart from each other at equal intervals based on the horizontal direction, and the fixed rib module is provided between neighboring first ventilation holes.

Alternatively, the fixed rib module is a first fixed rib on which a power means for supplying power to the motor is mounted, and includes a pair of opposing side walls, so that the power means is inserted between the pair of side walls. A first fixing rib; and a second fixing rib extending radially from the outer surface of the main body module; We would like to provide an air purifier that includes.

Alternatively, the second fixing rib may include: a first side wall extending from a side of the base frame, the lower end of which is inclined upward in the radial direction, thereby lowering the height; and a second side wall extending from the outside of the first side wall and having a constant height at the lower end. We would like to provide an air purifier that includes.

Alternatively, the first and second side wall portions are formed with upper ends having a constant downward slope, and each upper end is formed on an extension of the slope.

Alternatively, the cover frame protrudes downward from the base frame, and the second ventilation hole is formed at a maximum distance from the center of the motor accommodated in the base frame.

Alternatively, the cover frame has a dome shape formed to have a predetermined curvature, and the second ventilation hole is formed at the center of the cover frame, and the center is located on a virtual extension line with respect to the drive shaft. We would like to provide an air purifier.

Alternatively, the motor may include a support plate formed to correspond to a horizontal cross-section of the base frame and coupling the motor body to the inside of the base frame; It is intended to provide an air purifier including, wherein the support plate is formed to be larger than the motor body based on the horizontal cross-section, thereby forming the flow space.

The motor housing assembly and air purifier according to one disclosure of the present invention can improve user safety by preventing overheating of the driving means in a simple manner by forming a base frame and a cover frame with a specific structure.

In addition, the motor housing assembly and air purifier according to one disclosure of the present invention can maximize the heat dissipation effect by forming the fixed rib module in a specific structure.

1 is an exploded perspective view of a motor housing assembly according to an embodiment of the present invention.
Figure 2 is a perspective view showing a motor housing assembly and a fan module combined according to an embodiment of the present invention.
Figure 3 is an example of an air purifier to which the present invention is applied, which has a structure divided into an upper body and a lower body, and the upper body is shown separately in (a) and (b) when viewed from different angles. .
Figure 4 is an example of the air purifier of Figure 3, showing the upper body and lower body separated, (a) is a front view, and (b) is an exploded perspective view.
Figure 5 is an example of the air purifier of Figure 3, and is a bottom view of the upper body.
Figure 6 is an exploded perspective view of a motor housing assembly according to an embodiment of the present invention.
Figure 7 is a plan view of a motor housing assembly according to an embodiment of the present invention, and is a view showing the cover frame transparently for convenience of explanation.
Figure 8 (a) is a side view of the motor housing assembly according to an embodiment of the present invention, and (b) schematically shows the inflow and outflow of fluid.
Figure 9 is a perspective view of a motor housing assembly according to an embodiment of the present invention.
Figure 10 is a heat dissipation analysis result for a structure in which no ventilation holes are formed on the cover frame, and Figure 11 is a heat dissipation analysis result for a structure in which ventilation holes are formed on the cover frame.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be “connected” to another part, this is not only the case when it is “directly connected”, but also when there is another component in between, and when there is another component in between. This also includes cases where they are “electrically connected.” Additionally, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Hereinafter, among the terms used herein, 'upward' and 'downward' are defined based on the standing form of the air purifier shown in FIG. 4. That is, 'upward' refers to the side where the drive shaft of the motor faces, and 'downward' refers to the side where the cover frame disposed below the motor of the present invention is located. Additionally, 'horizontal direction' refers to a direction perpendicular to the direction of extension of the drive shaft of the motor, and 'vertical direction' refers to a direction parallel to the direction of extension of the drive shaft of the motor.

Figure 1 is an exploded perspective view of a motor housing assembly according to an embodiment of the present invention, and Figure 2 is a perspective view showing a motor housing assembly and a fan module combined according to an embodiment of the present invention.

With reference to FIGS. 1 and 2, a motor housing assembly according to an embodiment of the present invention will be described.

The motor housing assembly 100 includes a main body module and fixed rib modules 111, 113, and 115. The main body module is a housing configuration that embeds the motor 300 inside, and the fixed rib modules 111, 113, and 115 refer to a configuration that fixes the motor housing assembly 100 within the air purifier.

The main body module consists of a base frame 110 and a cover frame 120. The base frame 110 may be configured in a shape that corresponds to the shape of the motor. The horizontal cross-section of the motor body 310 is circular, and the base frame 110 may be configured in a cylindrical shape. However, since the shape shown in the drawings herein is an example, the shape of the base frame 110 may be designed to have an optimal structure according to the designer's selection.

The base frame 110 is a cylindrical structure with an open bottom. The upper side is the bottom surface, which is formed as a closed surface, but the drive shaft hole 119 is formed so that the drive shaft 320 of the motor 300 penetrates to the outside. The drive shaft 320 has a structure that extends upward, and the end of the drive shaft 320 is connected to the drive shaft coupling portion 220 of the fan module 200, so that the power of the motor can be transmitted to the fan module 200. . The method of connecting the drive shaft 320 and the drive shaft coupling portions 111c, 113b, and 115c of the fan module 200 can be any known method, such as male-female coupling.

A plurality of first ventilation holes 112, 114, and 116 may be formed on the side of the base frame 110, which has a cylindrical shape, at preset intervals. As an example, the plurality of first ventilation holes 112, 114, and 116 may be formed to be spaced apart from each other at equal intervals of 120 degrees along the circumferential direction with respect to the center of the base frame 110. At this time, fixed rib modules 111, 113, and 115 may be provided at the centers between neighboring first ventilation holes 112, 114, and 116, respectively. In the present application, the shape of the first ventilation holes 112, 114, and 116 is described based on a structure formed of a rectangular opening formed along the circumferential direction, but this is an example of the first ventilation holes 112, 114, and 116. It is only a typical shape, and the shape of the opening can be changed depending on the designer's choice.

A motor 300 is built inside the base frame 110. At this time, the motor body 310 may be formed to be spaced a predetermined distance from the inner surface of the base frame 110. That is, a predetermined flow space is formed between the inner peripheral surface of the base frame 110 and the outer peripheral surface of the motor body 310.

Fluid may flow into the base frame 110 through the first ventilation holes 112, 114, and 116, and the introduced fluid may cool the motor 300 by performing heat exchange with the motor 300. . The main direction of the fluid forced to flow by the fan module 200 is configured to face upward.

Referring to Figures 3 and 4 together, in the lower body 20 of the air purifier, air is purified through a filter member (not shown), and the purified air is configured to flow upward and be discharged to the outside. The air purifier to which the present invention is applied may be configured so that the discharge module 12 formed at the top of the upper body 10 is lifted, and the purified air is discharged into the space between the discharge module 12 in a lifted state. You can.

In this way, by cooling the motor 300 using purified air, it is possible to prevent the problem of damage to the motor 300 due to foreign substances entering the motor 300.

The fan module 200 that forces fluid to flow includes an upper frame 240 and a lower frame 230, and the upper frame 240 and the lower frame 230 are spaced apart from each other at a predetermined distance. The fan blades 210 are configured to connect between the upper frame 240 and the lower frame 230, and the shape and number of fan blades 210 are not limited to those shown in the drawings and are determined by the designer's selection. Can be optimally designed.

As described above, there may be three first ventilation holes 112, 114, and 116. If the size of the first ventilation holes 112, 114, and 116 increases, the structural rigidity of the base frame 110, which cushions the vibration of the motor 300, may decrease, thereby reducing the output and cooling efficiency of the motor 300. It is desirable to design with this in mind.

The fixing rib modules (111, 113, 115) are composed of a first fixing rib (113) on which the power means (118) for electrical connection with the motor (300) is seated, and second fixing ribs (111, 115) for stable fixation. can be distinguished. They each extend in a radial direction. As shown in Figure 5, the first fixing rib 113 is also fixed to the inside of the air purifier through a coupling means, but unlike the second fixing ribs 111 and 115, the power supply means 118 is inserted. The structure is different.

Referring to FIG. 6, one first fixing rib 113 and two second fixing ribs 111 and 115 may be provided. This corresponds to the number and location of the first ventilation holes 112, 114, and 116. As described above, the first and second fixing ribs 111 and 115 are provided between the neighboring first ventilation holes 112, 114 and 116 (preferably at the midpoint), and they are also based on the horizontal direction. Thus, they can be placed at equal intervals of 120 degrees.

The first fixing rib 113 may be composed of a pair of opposing side walls to stably accommodate the power source 118 (see Figure 1). An accommodating space (113a) is formed between a pair of opposing side walls, and the power supply means (118) is stably seated in the accommodating space (113a). If stable power is not supplied to the motor 300, the air purifier cannot force fluid to flow, so the structure minimizes exposure of the power source 118.

Unlike the first fixing rib 113, the second fixing ribs 111 and 115 may be configured in the form of a single side wall. The single side wall shape is formed in a vertical direction upward, so as not to cause significant interference with the main flow of fluid.

The second fixing ribs 111 and 115 may function as heat dissipation fins. Thermal energy generated by the motor 300 is transmitted to the second fixed ribs 111 and 115, and the second fixed ribs 111 and 115 located on the outside of the base frame 110 exchange heat with the fluid flowing upward. This is done.

The second fixing ribs 111 and 115 are formed in a structure to maximize heat dissipation effect. Specifically, it may be divided into first side wall portions 111a and 115a and second side wall portions 111b and 115b.

The sides adjacent to the base frame 110 are the first side wall portions 111a and 115a. The first side wall portions 111a and 115a extend from the outer peripheral surface of the base frame 110, and have a lower end that slopes upward in the radial direction, thereby forming a side wall whose height decreases. In other words, it is a structure in which the area of the side wall gradually decreases. By forming the area adjacent to the base frame 110 to be the largest and reducing the area of the side wall as it moves away, the heat dissipation effect can be maximized and the structure can be miniaturized.

The second side wall portions 111b and 115b refer to portions extending from the outer ends of the first side wall portions 111a and 115a. At this time, the height of the lower part can be made constant. That is, the bottom surfaces of the second side wall portions 111b and 115b may extend horizontally. As shown in FIG. 8, it can be formed at the same level as the coupling portions 111c, 113b, and 115c connected to the inside of the air purifier. This is in consideration of the manufacturability of the second fixing ribs 111 and 115 and the convenience of the worker fastening them.

Meanwhile, the upper ends of the first side wall portions 111a and 115a and the second side wall portions 111b and 115b may be formed to have a constant downward slope as the distance from the center of the base frame 110 increases. At this time, the upper ends of the first side wall portions 111a and 115a and the second side wall portions 111b and 115b are not distinguished from each other and may be formed as the same extension line.

Referring to FIG. 6, the main body module of the motor housing assembly 100 according to the present invention further includes a cover frame 120. The base frame 110 has an open lower side, and the cover frame 120 is configured to cover the lower side.

The cover frame 120 closes the lower part of the base frame 110, and a second ventilation hole 121 having a predetermined diameter is formed at the center. The second ventilation hole 121 is located in the main path of the fluid forced to flow by the fan module 200. The fluid purified through the second ventilation hole 121 is configured to enter and exit the main body module to perform heat exchange.

Referring to FIGS. 6 and 8 together, the cover frame 120 has a dome shape that protrudes in a direction opposite to the bottom of the base frame 110. A dome structure is shown herein as an exemplary structure, but it may be designed in a cone shape. The second ventilation hole 121 is formed at the maximum distance from the center of the motor accommodated in the base frame 110, thereby maximizing the heat exchange efficiency of the fluid flowing into the base frame 110. Based on the dome structure, the above maximum distance means when the second ventilation hole 121 is located at the center of the dome, and the center can be located on a virtual extension line of the drive shaft 320 of the motor 300. there is. The curvature of the cover frame 120, which has a dome structure, can be designed by comprehensively considering the size of the motor 300, the diameter of the base frame 110, and heat exchange efficiency.

FIG. 8 schematically shows the process in which fluid flows in through the second ventilation hole 121 and the fluid flows inside. Fluid flowing in through the second ventilation hole 121 may flow out to the outside through the first ventilation holes 112, 114, and 116, and vice versa.

FIG. 10 is a heat dissipation analysis result for a structure in which a ventilation hole is not formed on the cover frame 120, and FIG. 11 is a heat dissipation analysis result for a structure in which a ventilation hole is formed on the cover frame 120. Comparing the CFD analysis results of Figures 10 and 11, it can be seen that the cover frame 120 is formed in a dome structure and the second ventilation hole 121 is formed in the center, thereby significantly increasing the fluid flow inside the main body module. You can.

In addition, through the present applicant's experiments, it was confirmed that the air cleaning performance and heat dissipation effect of the air purifier using the motor housing assembly according to the present invention were significantly increased. First, the fluid flow became smoother due to the second ventilation hole 121, and compared to the structure without the second ventilation hole 121, the air purifier cleaning ability (CADR) increased by 3.37%. It was confirmed that it increased from 9.2CMM to 9.51CMM. For reference, the purification ability test conducted by the present applicant was conducted in accordance with the standards of the Korea Air Cleaning Association.

In addition, the effect of lowering the maximum temperature of the IC (Integrated Circuit) of the motor 300 by 8.5°C was confirmed. Specifically, it was confirmed that it decreased from 69.6°C to 61.1°C. In this way, by applying the structure according to the present invention, it is possible to protect electrical elements such as ICs that are vulnerable to heat and at the same time prevent damage due to heat.

Meanwhile, referring to FIG. 7, the inner peripheral surface of the base frame 110 is spaced apart from the motor body 310 accommodated therein by a preset distance, thereby forming a fluid flow space. However, if the motor 300 is not stably fixed to the inner peripheral surface of the base frame 110, it is difficult for the drive shaft 320 of the motor 300 to rotate stably, so for stable fixation, the motor 300 is provided with a support plate ( 330) can be provided.

The support plate 330 is formed to correspond to the horizontal cross-section of the base frame 110, so that the motor body 310 can be tightly coupled to the inside of the base frame 110. The support plate 330 is coupled to the upper surface of the motor body 310 and is formed larger than the motor body based on the horizontal cross-section, thereby forming a flow space.

In the present invention, the above embodiment is an example and the present invention is not limited thereto. Anything that has substantially the same structure and achieves the same effect as the technical idea described in the claims of the present invention is included in the technical scope of the present invention.

10: Upper body
20: Lower body
100: Motor housing assembly
110: Base frame
111, 115: second fixing rib
113: first fixing rib
112, 114, 116: first ventilation hole
120: Cover frame
121: Second ventilation hole
200: Fan module
300: motor
310: motor body
320: drive shaft
330: Support plate

Claims (10)

In the air purifier including a motor housing assembly,
The motor housing assembly,
A main body module that provides an accommodating space for a motor that operates the fan module, wherein a drive shaft hole is formed so that the drive shaft of the motor passes through to the outside, and a ventilation hole through which fluid enters and exits is formed on at least one side; and
At least one fixed rib module extending from the outer surface of the main body module and coupled to the air purifier main body; Includes,
The inner surface of the main body module is,
By being spaced apart from the motor body housed inside by a preset distance, a flow space for fluid entering and exiting the ventilation hole is formed,
air cleaner. According to claim 1,
The main body module is,
A base frame having a housing structure with one side open, the base frame having a plurality of first ventilation holes formed on the side at preset intervals; and
a cover frame that covers the one surface and has a second ventilation hole; Including, air purifier. According to clause 2,
The one surface is a plane perpendicular to an imaginary extension line of the drive shaft,
The base frame is,
The one side is open in a cylindrical shape, and the plurality of first ventilation holes are formed to be spaced apart in the circumferential direction.
air cleaner. According to clause 3,
The plurality of first ventilation holes are,
They are spaced apart from each other at equal intervals based on the horizontal direction, and the fixed rib modules are provided between neighboring first ventilation holes,
air cleaner. According to claim 1,
The fixed rib module is,
A first fixing rib on which a power means for supplying power to the motor is seated, and which includes a pair of opposing side walls, so that the power means is inserted between the pair of side walls; and
a second fixing rib extending radially from the outer surface of the main body module; Including,
air cleaner. According to clause 5,
The second fixing rib is,
A first side wall portion extending from a side of the base frame, the lower end of which is inclined upward in the radial direction, thereby lowering the height. and
a second side wall extending from the outside of the first side wall and having a constant height at the lower end; Including,
air cleaner. According to clause 6,
The first and second side walls,
The upper end is formed to have a constant slope downward, and each upper end is formed on an extension of the slope,
air cleaner. According to clause 2,
The cover frame is,
It protrudes downward from the base frame,
The second ventilation hole is,
Formed at the maximum distance from the center of the motor accommodated in the base frame,
air cleaner. According to clause 8,
The cover frame is,
It is a dome shape formed to have a predetermined curvature,
The second ventilation hole is formed at the center of the cover frame, and the center is located on a virtual extension line with respect to the drive shaft.
air cleaner. According to clause 2,
The motor is,
a support plate formed to correspond to a horizontal cross-section of the base frame and coupling the motor body to the inside of the base frame; Including,
The support plate is,
Based on the horizontal cross-section, the flow space is formed by being larger than the motor body,
air cleaner.

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