KR102117256B1 - Fan unit for electric fan and electric fan assembly with the same - Google Patents

Abstract

The present invention can convert a conventional fan into an air cleaner simply by replacing the fan blade, and in particular, can solve the motor head overheating problem that may occur when a fan unit made of a fan and other structure is mounted on the fan motor. It relates to a fan unit for a fan and a fan assembly having the same.
A fan unit for a fan according to the present invention is a fan unit mounted on a fan, the lower disk having a first air inlet formed therethrough; An upper disc through which a second air inlet is formed; A dust collecting filter disposed along the circumference of the lower disk or the upper disk between the lower disk and the upper disk; And a fastener connecting the lower disk or the upper disk to the motor of the fan. In addition, the first air inlet and the second air inlet is characterized in that it is configured to satisfy the following conditional expression 1.
Conditional Expression 1
0 ≤ K2 ≤ K1 × 85%
(Here, K1: total area of the first air inlet, K2: total area of the second air inlet)

Description

Fan unit for electric fan and fan assembly provided with the same {FAN UNIT FOR ELECTRIC FAN AND ELECTRIC FAN ASSEMBLY WITH THE SAME}

The present invention relates to a fan unit that is mounted on a fan motor and rotates. More specifically, the present invention relates to a fan unit for a fan and a fan assembly having the same, which enables a fan commonly used in everyday life to be converted to an air cleaner.

Fan is a device that provides coolness by generating wind, and is inexpensive and efficient, so it is widely used. These fans are mostly used around the summer when the temperature is high, but they have the characteristics of seasonal household appliances that are stored in a separate place because they have no use in the season when the temperature goes down.

On the other hand, recently, air purifiers are widely used and used to purify indoor air from the environment of fine dust and various harmful gases, but there is a disadvantage in that a relatively expensive air purifier must be purchased to purify a space in a general home environment.

Therefore, if the fan commonly used in most homes can be converted to an air cleaner, the seasonality of the fan use as well as the cost problems of the conventional air cleaner can be simultaneously solved. The effect can be significant.

The following forms are disclosed as a fan having a conventional air cleaning function. In the case of Korean Patent Publication No. 10-2006-0061418, in order to provide an air cleaning function to a general fan, a fan having a filter in the form of a charged film attached to the rear portion of the rotary blade, that is, the back of the protective net, is disclosed, and the Korean Patent Publication In the case of No. 10-2004-0093359, a fan is provided in which an adsorption type deodorizing filter such as zeolite is detachably attached to a protective net.

However, all of the fans having the air cleaning function of the related art adopt a method of attaching and detaching the air purification filter to the fan's protection net, and thus cannot generate sufficient wind pressure on the filter surface, and accordingly the amount of air passing through the filter. Had this little problem. As a result, a fan having a conventional air cleaning function has a large reduction in air volume due to a filter, and has insufficient performance to remove fine dust and harmful gases, and thus has an inadequate limit as an air purifier as well as an original function of the fan.

On the other hand, if the structure of the fan unit (ie, the wing) is changed among the components of the fan assembly, a change may occur in the air flow direction. When this air flow change occurs, the cooling rate of the motor may be changed, and the motor may overheat. . In particular, if the motor head containing the motor is overheated to 60 ° C or higher due to overheating of the motor, motor damage, fuse blown or thermal deformation may occur, or even a fire may occur. Therefore, when a fan unit having a different structure is applied instead of a fan which is already installed in a fan, the motor overheating problem corresponds to a very important consideration in designing a fan unit for a fan.

Korean Patent Publication No. 10-2006-0061418 (Publication date: 2006.06.08) Korean Patent Publication No. 10-2004-0093359 (Publication date: 2004.11.05)

The present invention is to solve the problems as described above, the object of the present invention is to provide a fan unit for a fan and a fan assembly having the same, which can convert a conventional fan into an air cleaner by simply replacing the fan blade. will be.

Another object of the present invention is to perform the air cleaning function while being able to satisfy that the rising temperature of the motor head is maintained at less than 60 ° C, even if the fan unit of the present invention is used instead of removing the blade provided in a conventional electric fan. It is to provide a fan unit for a fan and a fan assembly having the same.

A fan unit for a fan according to the present invention for achieving the above object is a fan unit mounted on a fan, the lower disk having a first air inlet formed therethrough; An upper disc through which a second air inlet is formed; A dust collecting filter disposed along the circumference of the lower disk or the upper disk between the lower disk and the upper disk; And a fastener connecting the lower disk or the upper disk to the motor of the fan.

In addition, the first air inlet and the second air inlet is characterized in that it is configured to satisfy the following conditional expression 1.

Conditional Expression 1

0 ≤ K2 ≤ K1 × 85%

(Here, K1: the total area of the first air inlet, K2: the total area of the second air inlet, and the conditional expression 1 assumes that the fan unit is mounted on the fan, the first air inlet is the first 2 Based on the case where it is located closer to the motor than the air inlet)

The fan unit for a fan of the present invention is characterized in that the lower disk is mounted on the fan so that it is located closer to the fan motor than the upper disk.

The fan unit for a fan of the present invention has an insertion hole formed in a fastener, and the fastener is configured such that the insertion hole is located on the center of the lower disk or the upper disk, and the insertion hole has a drive shaft of the motor of the fan. It is configured to be inserted.

In addition, one side of the fastener of the present invention is characterized by including a pair of recesses formed around the insertion hole and another pair of recesses.

According to the fan unit for a fan according to the present invention, by simply mounting the fan unit to a fan commonly used in everyday life, the fan can be converted into an air cleaner, and the fan, which was a seasonal household appliance, can be used as a household appliance for all seasons. In particular, it is possible to enjoy the air purifying function of a normal air purifier at a relatively low cost without purchasing or having a separate air purifier.

In addition, according to the fan unit for a fan according to the present invention, even when mounted and used in a fan of various types and materials, the motor head temperature is not overheated by 60 ° C. or more, which occurs when the structure of a conventional fan fan (eg, a wing) is deformed There is an effect that can prevent problems such as overheating of the motor and damage to the motor, blown fuse, or thermal deformation.

1 is a perspective view of a lower disk of the fan unit for a fan according to the present invention.
Figure 2 is a perspective view of the upper disk of the fan unit for a fan according to the present invention.
3 is a rear side perspective view of a fan unit for a fan according to the present invention.
Figure 4 is a front side perspective view of a fan unit for a fan according to the present invention.
5 is a test data for the motor head temperature change compared to the total area ratio between the first and second air inlet of the fan unit according to the present invention.
Figure 6 is a side view showing the motor and drive shaft of the fan according to the present invention.
7 is a top side view showing a first fastener according to the present invention, an insertion hole formed therein, and first, second and third recesses.
Figure 8 (a), (b), (c) is a cross-sectional view of the first fastener for explaining the characteristics of the first, second, and third recesses according to the present invention.
9 is a perspective view of a fan unit for a fan further comprising a plurality of blades as another embodiment of the present invention.
10 is an exploded perspective view of a fan assembly having a fan unit according to the present invention.
11 is a top cross-sectional view of a fan assembly having a fan unit according to the present invention.

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms “include” or “have” are intended to indicate that a feature, number, step, action, component, part, or combination thereof, described on the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

In addition, in the present specification, “to or above” means to be positioned above or below the target part, which does not necessarily mean to be located above the gravity direction. That is, the term "on or above" referred to in this specification includes not only the case where the object part is located above or below, but also when it is located before or after the object part.

Also, when a portion of an area, plate, or the like is said to be "on or above" another portion, it is not only when the other portion is in contact or spaced "on or above" another portion, but also another portion in the middle. Also included.

In addition, in this specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected to the other component, or may be directly connected, but in particular It should be understood that, as long as there is no objection to the contrary, it may or may be connected via another component in the middle.

Further, in this specification, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

Hereinafter, preferred embodiments, advantages, and features of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a lower disk of a fan unit for a fan according to the present invention, FIG. 2 is a perspective view of an upper disk of a fan unit for a fan according to the present invention, and FIG. 3 is a rear side of the fan unit for a fan according to the present invention 4 is a front side perspective view of a fan unit for a fan according to the present invention.

1 to 4, the fan for a fan according to the present invention includes a lower disk 10, a dust collecting filter 20, an upper disk 60, a fastener 40, and a support 50, Preferably, a plurality of blades 80 may be further included.

The lower disk 10 of the present invention is a base plate for supporting the dust collecting filter 20, and is disposed in a structure facing the upper disk 60 with the dust collecting filter 20 interposed therebetween.

The lower disk 10 is connected to the motor of the fan to receive rotational force from the motor and is configured to rotate around its center.

The lower disk 10 has an air inlet (hereinafter referred to as a 'first air inlet 13'), so that when the lower disk 10 rotates, external air is fanned through the first air inlet 13 The air flowing into the unit and the air flowing into the fan unit is moved toward the dust collecting filter 20 by the air pressure difference. The shape of the first air inlet 13 is not particularly limited, and may be formed in various shapes such as a circular shape, an arc shape, and a polygonal shape.

According to a preferred embodiment, the lower disk 10 may be composed of an annular plate body in which the first air inlet 13 is formed at the center, and the material may be made of a plastic material.

As another embodiment, the lower disk 10 may be formed in a disk shape, and may have a first air inlet 13 formed therethrough. In this case, the first air inlet 13 may be formed in various shapes such as a circular shape, circular arc shape, and polygonal shape.

The upper disk 60 of the present invention is another base plate that supports the dust collecting filter 20 together with the lower disk 10, and is disposed on the dust collecting filter 20, and the bottom of the dust collecting filter 20 is interposed therebetween. It is provided in a structure facing the disk 10.

The upper disk 60 may be fixedly attached to the dust collecting filter 20 through an adhesive or the like, or may be connected to the motor of the fan through a fastener 70 formed in the upper disk 60. 2, the upper disk 60 is connected to the fastener 40 provided at the center of the lower disk 10 through a fastener 70 provided at its center, and coupled to the drive shaft of the motor at the same time. It was configured to be.

The upper disk 60 may be formed through an air inlet (hereinafter, referred to as 'second air inlet 63') as in the lower disk 10, in which case the second air is rotated when the upper disk 60 is rotated. The air introduced through the inlet port 63 is moved to the dust collecting filter 20 side by the air pressure difference. The shape of the second air inlet 63 is not particularly limited, and may be formed in various shapes such as a circular shape, an arc shape, and a polygonal shape.

For reference, the air inlet 13 must be formed in the lower disk 10, but the upper disk 60 may be formed even if the air inlet 63 is not formed. If the air inlet 63 is formed, It must be designed to satisfy certain conditions.

According to a preferred embodiment, the upper disk 60 may be configured in a disc-shaped shape made of plastic, and may be formed in a shape in which a second air inlet 63 is formed through the disc. In this case, the second air inlet 63 may be formed in various shapes such as a circle, an arc shape, and a polygon.

The fan unit for a fan according to the present invention is mounted to a fan and is configured to perform an air cleaning function. In this case, when the first and second air inlets 13 and 63 are provided with structural features to be described later, the fan is mounted in the air as described above. In performing the clean function, it is possible to implement an optimal fan unit for the fan.

Hereinafter, features of the first and second air inlets 13 and 63 according to the present invention will be described in detail.

For reference, a conventional fan assembly has a fan protection net 5 in which an air passage hole is formed and a fan unit is accommodated therein, a motor connected to the drive shaft 2 and causing axial rotation of the drive shaft 2, and It is composed of a blade (not shown) that generates wind by being coupled to the drive shaft 2 of the motor (see FIG. 6).

However, if the fan unit of the present invention is used by replacing the blade among the components of the fan assembly, a change in the airflow direction designed based on the blade may occur. In addition, when such a change in air flow is caused, the cooling rate of the motor may be changed and the motor may overheat. In this case, it is directly related to a safety accident such as a fire or damage to the motor, which is very important in designing the fan unit for the fan. This is a matter to be considered.

Accordingly, the inventors of the present invention can solve the problems caused by motor overheating as described above when the first and second air inlets 13 and 63 formed on the upper and lower disks 10 and 60 are formed according to the following conditional expression 1. Was found.

Conditional Expression 1

0 ≤ K2 ≤ K1 × 85%

(Here, K1: total area of the first air inlet, K2: total area of the second air inlet)

For reference, when the fan unit of the present invention is used in combination with the fan, the lower disk 10 is mounted on the fan in a structure that is located closer to the motor of the fan than the upper disk 60. In other words, the outer surface of the upper disk 60 faces the front of the fan, and the outer surface of the lower disk 10 faces the rear of the fan.

Accordingly, condition 1 also assumes that the fan unit of the present invention is mounted on the fan, the first air inlet 13 of the lower disk 10 is a fan than the second air inlet 63 of the upper disk 60 It is based on when it is located closer to the motor.

According to the conditional expression 1, the second air inlet 63 is formed to have a total area of 85% or less compared to the total area of the first air inlet 13, or the total area is '0'. Here, the total area of the first air inlet 13 is a hole formed through the lower disk 10 so that external air in the lower disk 10 can pass through the lower disk 10 and flow into the fan unit. It refers to the area of all the openings of. Similarly, the total area of the second air inlet 63 is a hole formed through the upper disk 60 so that external air in the upper disk 60 can pass through the upper disk 60 and flow into the fan unit. It refers to the area of all the openings of.

In addition, the second air inlet 63 is formed to have a total area of '0', which means that the second air inlet 63 is not formed at all in the upper disk 60. That is, the upper disk 60 is composed of a complete plate body in which no opening in the form of a hole is formed, meaning that external air is not introduced through the upper disk 60.

As described above, according to conditional expression 1 in designing the first and second air inlets 13 and 63, it is possible to implement the air cleaning function according to the rotation of the fan unit, and at the same time, it is possible to determine the direction of the air flow which is advantageous for cooling the motor. There will be.

In other words, according to the conditional expression 1, the airflow flowing in the motor-side direction is sufficiently formed to realize a cooling action above a threshold necessary to prevent overheating of the motor, so even if the fan unit of the present invention is installed instead of removing the fan of the fan It is possible to prevent the occurrence of fire or damage to the motor due to overheating of the motor while converting the fan to an air cleaner.

5 is test data for a change in the motor temperature compared to the total area ratio of the first and second air inlets of the fan unit according to the present invention. The technical significance of conditional expression 1 will be described with reference to FIG. 5.

Prior to the description, for reference, an ordinary household electric fan should be able to prevent overheating of a temperature of a head (hereinafter referred to as a 'motor head') including a fan motor at 60 to 70 ° C when it is operated. This is because if the temperature of the fan motor head is overheated by 60 to 70 ° C., motor damage, fuse blown or thermal deformation may occur, and further, it may act as a cause of fire. Here, the term 'thermal deformation' due to overheating for a long time uses synthetic resin when manufacturing the head 1 that accommodates the fan motor, and when such synthetic resin is exposed to high temperatures above the heat resistance temperature, thermal deformation may occur, leading to product damage. have. For reference, in general, a lot of synthetic resins such as PVC or ABS are used in the manufacture of a fan, and the heat resistance temperature of PVC is about 65 ° C and the heat resistance temperature of ABS is about 75 ° C.

 For this reason, a conventional fan is designed with a fan blade design so that the motor head is not overheated by more than 60 to 70 ° C (hereinafter referred to as a 'limit temperature') through cooling of the motor head using air flow. It should be able to satisfy the same even if the fan unit of the present invention is mounted and driven.

In particular, the fan unit of the present invention is installed and used in a fan of various types and materials, and even when used in a fan made of a material having the lowest heat resistance temperature (for example, PVC), it should not cause thermal deformation. Therefore, the fan unit of the present invention should not overheat the motor head temperature above the limit temperature of 60 to 70 ° C., even if used in any type of fan, which is the first and second air inlets (13, 63) according to the above Conditional Expression (1). It can be achieved through design.

Comparative example  1: normal electric fan

This is the case where the fan fan of the present invention is mounted instead of the fan unit. In this case, when the normal electric fan is operated in the breeze mode for 30 minutes, the motor head temperature rises to about 45 ° C. In addition, the rising temperature of the motor head is lowered in the order of “mild wind (about 45 ℃) → weak wind (about 42 ℃) → strong wind (about 38 ℃)”. That is, it can be seen that a conventional electric fan satisfies a limit temperature of 60 to 70 ° C.

Test example  One : K2  = K1 × 95%

In a conventional electric fan, the wing is removed and the fan unit of the present invention is mounted, but the second air inlet 63 is designed to have a total area (K2) of 95% compared to the total area (K1) of the first air inlet (13).

As shown in FIG. 5, it can be seen that when the fan motor head is operated for 30 minutes in a breeze mode, the motor head temperature increases to about 66 ° C. On the other hand, the rise temperature of the motor head according to Test Example 1 is lower than that of Comparative Example 1 in the order of "mild wind (66 ° C) → weak wind (62 ° C) → strong wind (59 ° C)".

However, if the motor head temperature rises above a limit temperature of 60 to 70 ° C, as described above, thermal deformation due to motor overheating, motor damage or fuse blowout may occur, and furthermore, it may function as a fire generating factor. As a result, it cannot be used as a fan unit for electric fans.

Test example  2 : K2  = K1 × 85%

In a conventional electric fan, the wing is removed and the fan unit of the present invention is mounted, but the second air inlet 63 is designed to have a total area (K2) of 85% compared to the total area (K1) of the first air inlet (13).

As shown in FIG. 5, it can be seen that when the fan motor head is operated for 30 minutes in a breeze mode, the motor head temperature increases to about 58 ° C. On the other hand, the rise temperature of the motor head according to Test Example 2 is lowered in the order of “Breeze → Light Wind → Strong Wind” mode, as in Test Example 1.

Accordingly, when the second air inlet 63 is formed to have a total area (K2) of 85% compared to the total area (K1) of the first air inlet (13), it satisfies the motor head temperature rise limit temperature of less than 60 ~ 70 ℃, It can be seen that the fan unit of the present invention can be driven.

Test example  3: K2  = K1 × 70%

In a conventional electric fan, the wing is removed and the fan unit of the present invention is mounted, but the second air inlet 63 is designed to have a total area (K2) of 70% compared to the total area (K1) of the first air inlet (13).

As shown in FIG. 5, it can be seen that when the fan motor head is operated for 30 minutes in a breeze mode, the motor head temperature increases to about 52 ° C. On the other hand, the rising temperature of the motor head according to Test Example 3 is lowered in the order of “Breeze → Light Wind → Strong Wind” mode, as in Test Example 2.

Therefore, if the second air inlet 63 is formed to have a total area (K2) of 70% compared to the total area (K1) of the first air inlet (13), it satisfies the motor head temperature rise limit temperature of less than 60 ~ 70 ℃, It can be seen that the fan unit of the present invention can be driven, and further, the rise temperature of the motor head can be lowered by about 6 ° C. than in the test example (2).

Test example  4 : K2  = K1 × 58%

In a conventional electric fan, the wing is removed and the fan unit of the present invention is mounted, but the second air inlet 63 is designed to have a total area (K2) of 58% compared to the total area (K1) of the first air inlet (13).

As shown in FIG. 5, it can be seen that when the fan motor head is operated for 30 minutes in a breeze mode, the motor head temperature increases to about 50 ° C. On the other hand, the rising temperature of the motor head according to Test Example 4 is lowered in the order of “Breeze → Light Wind → Strong Wind” mode as in Test Example 3.

Therefore, when the second air inlet 63 is formed to have a total area (K2) of 58% compared to the total area (K1) of the first air inlet (13), it satisfies the motor head temperature rise limit temperature of less than 60 ~ 70 ℃, It can be seen that the fan unit of the present invention can be driven, and further, the rise temperature of the motor head can be lower than that of Test Examples (2) and (3).

Test example  5: K2  = K1 × 5%

In a conventional electric fan, the wing is removed and the fan unit of the present invention is mounted, but the second air inlet 63 is designed to have a total area (K2) of 5% compared to the total area (K1) of the first air inlet (13).

As shown in FIG. 5, it can be seen that when the fan motor head is operated for 30 minutes in a breeze mode, the motor head temperature rises to a level of about 40 ° C. On the other hand, the rising temperature of the motor head according to Test Example 5 is lowered in the order of “Breeze → Light Wind → Strong Wind” mode, as in Test Example 4.

Therefore, when the second air inlet 63 is formed to have a total area K2 of 5% compared to the total area K1 of the first air inlet 13, the motor head rising temperature greatly increases its limit temperature of 60 to 70 ° C. It can be seen that the base can be maintained at a level, and it can be seen that the rise temperature of the motor head can be lower than that of Test Examples (2), (3), and (4).

After all, as shown in Test Examples 1 to 5, if the fan unit is designed according to Conditional Expression 1, the air cleaning function can be performed while satisfying the motor head limit temperature (60 to 70 ° C) required for the fan. 2 It can be seen that the smaller the total area (K2) of the air intake (63) compared to the total area (K1) of the first air intake (13), the lower the temperature of the motor head appears. On the other hand, even when the total area of the second air inlet 63 is '0' (that is, when the second air inlet 63 is not formed in the lower disk 60), the motor head rising temperature is 60 ~ 60 It was found to be well below 70 ° C.

However, as the total area K2 of the second air inlet 63 decreases, the air intake per unit time (that is, the amount of external air flowing into the fan unit) may decrease in proportion to this, which decreases the air cleaning performance. As it may lead to, the total area K2 of the second air inlet 63 is preferably designed to simultaneously consider the rising temperature of the motor head and the amount of air intake per unit time. That is, it is desirable to design the fan unit so that it can satisfy that the motor head rising temperature is maintained below the limit temperature when the fan unit is driven to rotate, while at the same time increasing the air cleaning performance as much as possible.

When considering these two factors, the total area (K2) of the second air inlet (63) should be less than 85% compared to the total area (K1) of the first air inlet (13), preferably 70% or less It is preferably formed of, and more preferably, 50% or less.

The dust collecting filter 20 of the present invention is a filter for filtering harmful microparticles in the air flowing through the first and second air inlets 13 and 63, and is composed of a circular or polygonal band shape as a whole, and the lower disk 10 ) And the upper disk 60 are disposed along the circumference of the lower disk 10 or (and) the upper disk 60.

The dust collecting filter 20 may use a filter in which a number of fine pores are formed, and may be formed of various materials such as nonwoven fabric, cloth, metal mesh, sponge, ceramic, and preferably a HEPA filter to a nonwoven fabric filter. It may be composed of a filter made of an irregularly arranged fiber structure.

According to a preferred embodiment, the dust collecting filter 20 may be formed in a structure in which both surfaces are repeatedly bent in a zigzag manner on the inner surface of the lower disk 10 as in the embodiments of FIGS. 3 and 4. In this case, the dust collecting filter 20 forms a wave shape in which irregularities are repeated along the circular circumference of the lower disk 10.

The fastener 40 of the present invention is configured to interlock the rotational drive of the fan motor to the fan unit of the present invention, and is configured to connect the lower disk 10 or the upper disk 60 to the motor of the fan.

According to one embodiment, the fastener 40 may be connected and fixed to the lower disk 10 through the support 50. In this case, the fastener 40 is formed in a cylindrical shape, located in the center of the lower disc 10, that is, in the center of the circular air passage hole, and the insertion hole 41 formed in the fastener 40 is the lower disc 10 It is configured to be located on the central axis of. Here, the 'center axis' of the lower disk 10 may be a rotation axis of the lower disk.

According to another embodiment, the fastener 40 may be connected and fixed to the upper disk 60 through the support 53. In this case, the upper disk 60 is composed of a circular or annular plate body, the fastener 40 is located in the center of the circular or annular plate body, the insertion hole 41 of the fastener 40, the upper disc 60 ) And the central axis of the lower disk 10 are both on the same line.

For reference, in the embodiment of FIGS. 1 to 4, the fastener (hereinafter referred to as 'first fastener 40') coupled to the fan motor is connected to the lower disk 10 through a plurality of supports 50 It is configured to be fixed to the center of the lower disk (10). In addition, another fastener (hereinafter referred to as 'second fastener 70'), which is connected to and fixed to the upper disk 60 through a plurality of supports 53, is formed in the center of the upper disk 60. The upper disk 60 was configured to be coupled to the lower disk 10 through the fastener 70.

In the first fastener 40 of the present invention, the insertion hole 41 is formed in the central portion of the motor so that the drive shaft of the motor can be inserted and the insertion hole 41 is formed on one surface of the first fastener 40. It includes a pair of first grooves 45 formed centrally, preferably may further include a second grooves 46.

The insertion hole 41 of the first fastener 40 is a configuration that is substantially coupled to the drive shaft of the fan motor, and is hollow formed through the first fastener 40 along the height direction of the first fastener 40 Structure. Here, the height direction of the first fastener 40 refers to the long axis direction of the drive shaft based on the state in which the first fastener 40 is coupled to the drive shaft of the motor.

According to a preferred embodiment, the insertion hole 41 is formed on the central axis of the first fastener 40, the central axis of the lower disk 10, the central axis of the first fastener 40 and the insertion hole 41 ) May be configured such that all of the central axes are located on the same line.

The insertion hole 41 is configured to have a long axis length of less than 80 mm and a diameter of more than 2 mm, and the reason for this is as follows. Prior to the description, the definition of the “long axis length L1 of the motor drive shaft 2” referred to in the present invention is as follows.

6 is a side view showing a motor and a drive shaft of a fan according to the present invention. A conventional fan motor is provided with a drive shaft 2 protruding from the front of the motor and coupled with a conventional fan fan, and a pair of catches 3 are formed in a symmetrical structure at the rear end of the drive shaft 2, A thread portion 4 is formed at the front end portion. In addition, the screw cap 4 has a fastening cap 6 screwed thereon, and is configured to couple and fix the conventional fan to the drive shaft 2. "Long axis length (L1) of the motor drive shaft 2" of the present invention, as described above, from the latch 3 of the entire length of the drive shaft 2 to the tip of the threaded portion 4 (that is, one end of the drive shaft 2) It refers to the length.

The upper disk 60 and the lower disk 10 of the present invention are connected to the fan motor through the first fastener 40 to receive the rotational force of the motor, and the first fastener 40 has an insertion hole 41 It is configured to be connected to the drive shaft 2 of the motor.

For reference, in the case of most electric fans currently being produced and sold for home or business, the long shaft length L1 of the motor drive shaft 2 is manufactured to be in the range of 30 to 80 mm. By the way, when the drive shaft 2 of the fan motor is inserted into the insertion hole 41 of the first fastener 40, the threaded portion 4 of the drive shaft 2 passes through the insertion hole 41 to pass through the first fastener It should be projected outside the tip of the (40) to be able to fasten the cap 6 to the threaded portion (4). Accordingly, when considering the drive shaft 2 (ie, 80 mm) having the longest long axis length L1, the insertion hole 41 of the first fastener 40 should be formed to have a long axis length of less than 80 mm. When the drive shaft 2 is coupled to the 41, the threaded portion 4 can protrude to the outside of the insertion hole 41 (that is, outside the fastener 40).

And, in the case of most electric fans currently being produced and sold for home or business, the outer diameter of the motor drive shaft 2 is manufactured to be within the range of 2 to 10 mm. Therefore, when considering the drive shaft 2 (2 mm) having the smallest outer diameter, the first fastener 40 must have an inner diameter whose insertion hole 41 exceeds a minimum of 2 mm so that the drive shaft 2 of the fan motor has this. It can be inserted into the insertion hole (41).

The first recess 45 is an engaging hole formed in a mutually symmetrical structure around the insertion hole 41 on one surface of the first fastener 40, the insertion hole 41 of the first fastener 40 When the drive shaft 2 of the fan motor is inserted into, a pair of catches 3 protruding from the rear end of the drive shaft 2 are inserted into and coupled to the first recess 45.

The rotational force of the drive shaft 2 can be transmitted to the first fastener 40 by the coupling between the first recess 45 and the catch 3, so that it is interlocked with the motor driving when the fan is on. 1 The fastener 40 is axially rotated, thereby causing rotational motion of the upper disk 60 and the lower disk 10, thereby performing the fan and air purification functions of the fan unit of the present invention.

According to a preferred embodiment, the fan unit of the present invention may further include a second recess 46 in addition to the first recess 45.

7 is an upper side view showing a first fastener according to the present invention, an insertion hole formed therein, and first, second, and third recesses, and FIGS. 8 (a), (b), (c) are made according to the present invention. It is a cross-sectional view of a fastener for explaining the features of the 1,2 and 3 recesses.

Referring to FIGS. 7 and 8, the second recess 46 is a catch coupling groove formed in a mutually symmetrical structure around the insertion hole 41 on one surface of the first fastener 40, the function of which is 1 Same as the recess 45. In addition, the first recess 45 and the second recess 46 are characterized in that the depths P1 and P2 of the recess are different from each other.

In other words, the bottom surface B2 of the second recess 46 and the bottom surface B1 of the first recess 45 are configured to be located at different heights based on one end C1 of the insertion hole 41. do. For example, in FIG. 8, the bottom surface B1 of the first recess 45 is located at a height 'H1' from the lower end C1 of the insertion hole 41, and the bottom surface B2 of the second recess 46 Is configured to be positioned at the 'H2' height from the lower end (C1) of the insertion hole (41).

Therefore, the bottom surface B2 of the second recess 46 is located closer to the lower end C1 of the first fastener 40 than the bottom surface B1 of the first recess 45. That is, the deeper the groove portion of the present invention, the deeper the bottom surface of the groove portion is located closer to the lower end C1 of the first fastener 40. For example, in the case of FIG. 8, the depth P2 of the second groove 46 is formed deeper than the depth P1 of the first groove 45, and the bottom surface B2 of the second groove 46 is formed. ) Is located closer to the lower end (C1) of the first fastener 40 than the bottom (B1) of the first recess 45.

Furthermore, the fan unit of the present invention may further include a third recess 47, a fourth recess, ..., an N recess. In this case, the third groove portion 47 is a locking groove formed in a mutually symmetrical structure around the insertion hole 41 on one surface of the first fastener 40, the function of which is the first groove portion 45 Is the same as In addition, the first, second, third and Nth recesses are formed to have different depths of the recesses. For reference, in the example of FIG. 8, the depths P1, P2, and P3 of the grooves become deeper in the order of the first groove portion 45, the second groove portion 46, and the third groove portion 47 in order. The height (H1, H2, H3) of (B1, B2, B3) was configured to be lower.

Accordingly, the bottom surface B2 of the second recessed portion 46 is located closer to the lower end C1 of the first fastener 40 than the bottom surface B1 of the first recessed portion 45, and the third recessed portion The bottom surface B3 of 47 is located closer to the lower end C1 of the first fastener 40 than the bottom surface B2 of the second recess 46.

When the second recesses 46 to the N recesses are further provided as described above, compatibility with the fan unit of the present invention can be provided as follows. That is, in the case of most fans currently being produced and sold for home or business, the long shaft length L1 of the motor drive shaft 2 is manufactured in various lengths within a range of 30 to 80 mm. Therefore, each fan has a different length from the threaded part 4 to the clamp 3 by each manufacturer.

On the other hand, looking at the motor drive shaft coupling structure of the fan unit of the present invention, after the drive shaft sequentially penetrates the insertion hole 71 of the first fastener 40 and the insertion hole 71 of the second fastener 70 The threaded portion 4 of the drive shaft protrudes out of the second fastener 70, and the first and second fasteners 40 and 70 are screwed by screwing the tightening cap 6 to the threaded portion 4 protruding like this. It is connected and fixed to the drive shaft.

In addition, each fan has a plurality of types of long shaft length L1 of the drive shaft for each manufacturer. Thus, regardless of the various long shaft length L1 of the drive shaft, the first fastener 40 is fixedly coupled to the motor drive shaft. Should be able to

By the way, the fan unit of the present invention has a variety of depths (P1, P2, P3), such as the second recess 46, the third recess 47 in addition to the first recess 45 in the first fastener 40 By forming the groove portion of the, it is possible to flexibly respond to various drive shaft lengths L1 with one fan unit.

For example, in the case of an electric fan a having a drive shaft a having a long shaft length L1 of 70 mm, the fan unit of the present invention can be mounted on the electric fan a by engaging the first groove 45 with the engaging shaft of the drive shaft a, and the long shaft length (L1) In the case of the fan b having a drive shaft b of 50 mm, the fan unit of the present invention can be mounted on the fan b by coupling the catch of the drive shaft b to the second recess 46.

Therefore, according to the fan unit of the present invention, among the plurality of grooves configured with different depths, a groove that is suitable for the long shaft length L1 of the user's fan can be selected and applied. It becomes usable.

In the end, the fan unit of the present invention is configured with a structure specialized for a fan commonly used in everyday life, so that regardless of the type of the fan, the conventional fan fan is removed and the fan fan of the present invention is installed instead. It is also possible to convert to.

The second fastener 70 of the present invention is a configuration for mutually coupling the upper disk 60 and the lower disk 10, and the insertion hole 71 is formed in the center thereof so that the motor drive shaft can be inserted therethrough. . For reference, the second fastener 70 may be formed in the same shape and structure as the first fastener 40.

According to an embodiment, a plurality of fasteners 48 are formed in the first fastener 40, and a plurality of fasteners 78 may also be formed in the second fastener 70. In this case, the first fastener 40 and the first fastener 40 through a long screw that is screwed to the fastening hole 78 of the second fastener 70 through the fastening hole 48 of the first fastener 40 The two fasteners 70 may be coupled to each other, whereby the upper disk 60 and the lower disk 10 are mutually assembled to form one fan unit.

The support 50 of the present invention is a configuration for supporting and fixing the first fastener 40 so that the insertion hole 41 is located on the central axis of the lower disk 10, one end of which is attached to the first fastener 40 Connected, the other end may be formed of a rod-shaped member connected to the lower disk 10 or the upper disk 60. For reference, in the embodiment of Figures 1 to 4, one end of the support 50 is connected to the first fastener 40, the other end is connected to the lower disk 10, the center of the lower disk 10 The first fastener 40 was configured to be fixed.

When the support 50 is configured as a rod-shaped member, the support 50 may be provided in multiple pieces, and the plurality of supports 50 may have a structure extending radially or crosswise around the first fastener 40. Can be configured.

When the fan unit of the present invention further includes a second fastener 70, a support 53 that further supports the second fastener 70 to be positioned on the central axis of the upper disk 60 may be further included. You can. In this case, one end of the support 53 is connected to the second fastener 70, the other end is made of a rod-shaped member connected to the upper disk 60, the second fastener in the center of the upper disk 60 (70) can be fixed.

On the other hand, when the second air inlet 63 is not formed on the upper disk 60, the second fastener 70 is provided in the central region of the plate body of the upper disk 60 without the above-described separate support 53. It may be attached or mounted or integrally formed.

9 is a perspective view of a fan unit for a fan further including a plurality of blades as another embodiment of the present invention.

9, the blade 80 of the present invention is provided in the region of the first air inlet 13, is configured to rotate about the center of the lower disk 10 by the rotational force by the drive of the fan motor.

According to one embodiment, the blade 80 may be composed of a plate body disposed at an angle with respect to the lower disk 10 as shown in FIG. 9. In this case, a plurality of blades 80 may be provided, and each of the blades 80 may be formed in a downwardly inclined structure.

As described above, when the blade 80 is further formed on the fan unit of the present invention, the blade 80 is also rotated when the lower disk 10 is rotated. At this time, the fan of external air is rotated by the rotation of the blade 80. The inflow of the unit is promoted, and thus the air cleaning performance of the fan unit of the present invention, that is, the intake amount per unit time can be further improved.

Hereinafter, with reference to FIGS. 10 and 11, the air purifying operation of the fan assembly equipped with the fan unit of the present invention will be described.

10 is an exploded perspective view of a fan assembly having a fan unit according to the present invention, and FIG. 11 is a top cross-sectional view of a fan assembly having a fan unit according to the present invention.

First, when the fan equipped with the fan unit of the present invention is turned on, the first fastener 40 coupled to the motor rotates axially in connection with the motor driving, thereby causing the upper and lower disks 10 to be rotated. The rotational motion of is caused.

When the rotation of the fan unit of the present invention is started, the air inside the fan unit is discharged to the outside by the rotational force of the fan unit, thereby causing an air pressure difference between the center of the fan unit and the outside of the fan unit, the external air being in the direction of the arrow in FIG. As shown in (D1, D2), the first and second air inlets 15 and 65 are introduced into the fan unit.

At this time, as described above, if the total area (K1) of the first air inlet (13) is larger than the total area (K2) of the second air inlet (63), the first air inlet compared to the second air inlet (63) The amount of air sucked through (13) becomes larger, and in particular, the airflow flowing to the motor head side of the fan is generated more strongly, so that overheating of the fan motor head, that is, the above-mentioned limit temperature exceeding problem can be prevented.

On the other hand, as the fan unit goes outward from the center thereof, the centrifugal force rises rapidly, and the wind pressure is highest at the position of the dust collecting filter 20 on the outermost side of the fan unit. Accordingly, the air flowing into the center of the fan unit smoothly passes through the dust collecting filter 20 and fine dust, etc. are effectively filtered and then discharged in both side directions D3 of the fan unit.

The fan unit of the present invention as described above may be provided in the form of a fan assembly coupled to a motor drive shaft 2 provided in a conventional fan. In this case, the fan assembly of the present invention is a fan protection net 5 in which an air passage hole is formed and a fan unit is accommodated therein, and a drive shaft 2 is connected and a motor causing axial rotation of the drive shaft 2, and It can be configured to include a fan unit of the present invention coupled to the drive shaft 2 of the motor to rotate in conjunction with it when the drive shaft 2 rotates.

Although the preferred embodiment of the present invention has been described and illustrated using specific terms, such terms are only intended to clearly describe the present invention, and the embodiments and described terms of the present invention are the technical spirit and scope of the following claims. It is obvious that various changes and changes can be made without deviating from. Such modified embodiments should not be understood individually from the spirit and scope of the present invention, and should be said to fall within the scope of the claims of the present invention.

1: Head 2: Drive shaft of the fan motor
3: Clamp 6: Tightening cap
10: lower disc 13: first air inlet
20: dust collecting filter 40: first fastener
41: insertion hole of the first fastener 45: first recess
46: second recess 50,53: support
60: upper disc 63: second air inlet
70: second fastener 71: the insertion hole of the second fastener
80: blade

Claims (13)

motor; A drive shaft which is connected to the motor and is axially rotated and is formed with a stopper; And a fan unit mounted to the fan including a head accommodating the motor therein.
A lower disk having a first air inlet through which external air can be introduced; An upper disk having a second air inlet through which external air can be introduced; A dust collecting filter formed between the lower disk and the upper disk in a zigzag looped structure along the circumference of the lower disk or the upper disk; And a fastener connecting the lower disk or the upper disk to the drive shaft,
The fastener is configured to be coupled to a catch formed on the drive shaft, and when coupled to the catch, is configured to separate the lower disk from the head in the front region of the head,
When the fastener is coupled to the clamp, the lower disk is configured to be mounted on the fan in a structure positioned closer to the motor than the upper disk,
The first air inlet and the second air inlet is a fan unit for a fan, characterized in that configured to satisfy the following conditional expression 1.
Conditional Expression 1
0 ≤ K2 ≤ (K1 × 70%)
(Here, K1: the total area of the first air inlet, K2: the total area of the second air inlet, and the conditional expression 1 assumes that the fan unit is mounted on the fan, the first air inlet is the first 2 Based on the case where it is located closer to the motor than the air inlet)
delete delete According to claim 1,
An insertion hole is formed in the fastener,
The fastener is configured such that the insertion hole is located on the center of the lower disk or the upper disk,
The insertion hole is a fan unit for a fan, characterized in that the drive shaft of the motor of the fan is configured to be inserted.
The method of claim 4
A fan unit for a fan, further comprising a pair of first recesses formed around the insertion hole on one surface of the fastener.
The method of claim 5,
Further comprising a pair of second grooves formed around the insertion hole on one surface of the fastener,
The fan unit for a fan, characterized in that the depth (P1) of the first recess and the depth (P2) of the second recess are formed differently from each other.
The method of claim 5,
Further comprising a pair of second recesses formed around the insertion hole on one surface of the fastener,
The bottom surface (B1) of the first recessed portion and the bottom surface (B2) of the second recessed portion are configured to be located at different heights (H1, H2) based on one end (C1) of the insertion hole. Fan unit.
According to claim 4,
The insertion hole includes a long hole formed through the fastener,
The long hole is a fan unit for a fan, characterized in that it is configured to have a long axis length of less than 80 mm and a diameter greater than 2 mm.
According to claim 4,
Further comprising a support for fixing the fastener so that the insertion hole is located on the central axis of the lower disk or the upper disk,
The fan unit for an electric fan, characterized in that one end of the support is connected to the fastener, and the other end is made of a rod-like member connected to the lower disk or the upper disk.
According to claim 1,
Further comprising a plurality of blades provided in the first air inlet region,
The plurality of blades,
It is configured to rotate the center of the lower disk in the axis by the rotational force by the drive of the motor, the fan unit for the fan, characterized in that for introducing outside air into the fan unit.
The method of claim 10,
An insertion hole is formed in the fastener,
The fastener is configured such that the insertion hole is located on the center of the lower disk or the upper disk,
The insertion hole is configured to be able to insert the drive shaft of the motor of the fan,
Further comprising a plurality of supports for fixing the fastener so that the insertion hole is located on the center of the lower disk or the upper disk,
One end of the support is coupled to the fastener, the other end is made of a rod-like member coupled to the lower disk or the upper disk,
The plurality of blades are fan units for the fan, characterized in that each formed on the plurality of support.
According to claim 1,
The lower disk includes an annular plate body in which the first air inlet is formed in the central region,
The upper disk includes an annular plate body in which the second air inlet is formed in the central region,
The lower disk and the upper disk is a fan unit for a fan, characterized in that coupled to each other in a structure.
Fan protection net; motor; A drive shaft connected to the motor to rotate axially; And a fan unit for a fan according to any one of claims 1 to 4, wherein the fan unit is connected to the drive shaft and rotates in conjunction with it when the drive shaft rotates.

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