KR102500736B1 - air purifier and control method of air purifier - Google Patents

Abstract

This embodiment relates to an air purifier and a control method thereof.
In the air purifier according to the present embodiment, an air purifying module having a suction fan and a filter member, a flow control device having a circulation fan disposed above the air purifying module, and the air purifying module and the flow regulating device A battery provided in the air purifying module to supply power, a display unit outputting various information about the battery state, a battery life detecting unit detecting the life of the battery, and the detected battery life displayed in a memory unit A control unit may be included to output a battery replacement notification signal to the display unit when the value is less than or equal to the stored reference value.

Description

Air purifier and control method of air purifier {air purifier and control method of air purifier}

The present invention relates to an air purifier and a control method of the air purifier.

An air purifier is understood as a device that takes in polluted air, purifies it, and then discharges the purified air. For example, the air purifier may include a blower for introducing external air into the air purifier and a filter capable of filtering dust or bacteria in the air.

In relation to conventional air purifiers, the present applicant has disclosed the following prior art documents.

1. Publication number (publication date): KR10-2012-0071992 (July 3, 2012)

2. Title of Invention: Air Purifier

According to the prior literature, the body of the air purifier has air cleaning components such as a fan and a filter installed inside a case having a substantially rectangular parallelepiped shape. In addition, the air inlet is formed on the side and bottom of the main body of the air purifier, and the air outlet is formed on the top of the main body.

As described above, the conventional air purifier has a wired structure in which power is supplied by connecting a power cord to an outlet.

Accordingly, there is a disadvantage in that the degree of freedom of arrangement of the air purifier is lowered and the movement is inconvenient.

In addition, in the case of a conventional device equipped with a battery therein for a wireless structure, while using the air purifier wirelessly, the number of charging and discharging of the battery increases, and as a result, there is a problem in that the life of the battery is shortened.

In addition, as the lifespan of the battery is shortened, when the wireless air purifier is used, in a fully charged state, the usable time of the air purifier gradually decreases, resulting in user dissatisfaction.

Therefore, when the usable time of the air purifier in a wireless state is reduced due to a decrease in battery life through repeated use of the battery, it is necessary to inform the user of the corresponding information.

In order to solve the above problems, an object of the present embodiment is to provide a purifier that can be operated wirelessly using a battery and is easy to place and move.

In addition, an object of the present invention is to provide an air purifier capable of selecting and using a battery or an external power source even when an external power source is connected to the main body.

Another object of the present invention is to provide an air purifier capable of detecting the life of a battery in real time and outputting a battery replacement notification signal through the display device when the detected battery life is less than a reference value, thereby notifying a user.

In addition, the user can check the remaining life of the battery in real time, and when the remaining life of the battery falls below the reference value, a battery replacement notification is output so that the user recognizes this and provides an air purifier capable of replacing the battery. The purpose.

In addition, since the battery life is detected by measuring the internal resistance of the battery and a battery replacement notification is output to the user, the usable time of the battery is shortened and the user's discomfort is reduced. to be

Another object of the present invention is to provide an air purifier capable of adjusting the amount of air discharged according to the size of a space in which the air purifier is disposed.

Another object of the present invention is to provide an air purifier in which a plurality of modules can be independently driven based on a required amount of air cleaning.

In addition, an object of the present invention is to provide an air purifier capable of controlling operation according to a user's preference by providing a plurality of operation modes.

In addition, an object of the present embodiment is to provide an air purifier that allows air discharged from the air purifier to be discharged in various directions and reach a long distance.

An air purifier according to an embodiment of the present invention includes an air purifying module having a suction fan and a filter member, a flow control device having a circulation fan disposed above the air purifying module, and the air purifying module and the flow control device. A battery provided in the air purifying module to supply power, a display unit outputting various information about the battery state, a battery life detecting unit detecting the lifespan of the battery, and a reference value storing the detected battery life in the memory unit In the following cases, a control unit outputting a battery replacement notification signal to the display unit may be included.

In addition, the battery life detection unit may detect the life of the battery by measuring the internal resistance of the battery.

In addition, the battery life detection unit may measure internal resistance of a fully charged battery.

In addition, the battery life detection unit may measure internal resistance of the battery in a state in which the battery is connected to an external power source.

In addition, the battery life detection unit may measure the internal resistance of the battery in a state in which operation of the product is stopped.

In addition, the control unit may output a battery replacement notification signal to the display unit when it is determined that the life of the battery is less than the reference value, external power is not connected to the battery, and the product is operated using the battery.

In addition, the control unit may output a battery replacement notification signal to the display unit when it is determined that the battery life is 10% or less.

In addition, the control unit may stop using the battery when the life of the battery is equal to or less than a reference value.

In addition, the display unit may be provided in the air purifying module or the flow control device.

In addition, the display unit is provided in an external terminal, and the control unit can communicate wirelessly with the external terminal.

In addition, a plurality of air cleaning modules may be provided and stacked in a longitudinal direction.

A method for controlling an air purifier according to an embodiment of the present invention includes a first step of determining whether a battery is in a fully charged state, and a second step of determining whether an external power source is connected when the battery is in a fully charged state. And, when the external power is connected, the third step of determining whether the product is in operation, and when the product is in a stopped state, the fourth step of detecting the battery life, and the detected battery life is compared with the reference value and a fifth step of determining whether the detected battery life is less than or equal to the reference value, and a sixth step of outputting a battery replacement notification to the display unit when the battery life is less than or equal to the reference value.

In the fourth step, internal resistance of the battery may be measured.

In the fourth step, the battery life may be detected by comparing the internal resistance value of the battery according to the battery life stored in the memory unit with the detected internal resistance of the battery.

In the sixth step, when the life of the battery is 10% or less, a battery replacement notification may be output to the display unit.

According to this embodiment, it can be operated wirelessly using a battery, and placement and movement are facilitated, so that user convenience and satisfaction can be improved.

In addition, even when an external power source is connected to the main body, a battery or an external power source can be selected and used, so that the user's options can be diversified.

In addition, the battery life is detected in real time, and when the detected battery life is less than a reference value, a battery replacement notification signal is output through the display device to inform the user.

In addition, the user can check the remaining life of the battery in real time, and when the remaining life of the battery falls below a reference value, a battery replacement notification is output so that the user can recognize this and replace the battery.

In addition, since the battery life is detected by measuring the internal resistance of the battery and a battery replacement notification is output to the user, the usable time of the battery is shortened, and the inconvenience felt by the user can be resolved.

In addition, there is an effect that the amount of air discharged can be adjusted according to the size of the space where the air purifier is disposed.

In addition, based on the required amount of air cleaning, there is an effect that a plurality of modules can be independently driven.

In addition, since a plurality of driving modes are provided, driving can be controlled according to the user's preference.

In addition, this embodiment has an effect of allowing the air discharged from the air cleaner to be discharged in various directions and reach a long distance.

1 is a perspective view showing the appearance of an air purifier according to an embodiment of the present invention.
2 is a perspective view showing an internal configuration of an air purifier according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line AA' of FIG. 2 .
4 is a perspective view showing an excerpt of a flow control device, which is a part of the components of the present invention.
5 is a cross-sectional view showing air flow through the air purifier when the flow control device according to an embodiment of the present invention is in a first position.
6 is a cross-sectional view showing air flow through the air purifier when the flow regulator according to an embodiment of the present invention is in a second position.
7 is a perspective view showing air flow when an air cleaning module and a flow controller according to an embodiment of the present invention operate.
8 is a block diagram showing a controllable configuration of an air purifier according to an embodiment of the present invention.
9 is a flow chart showing a control method of an air purifier according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

<Air Purifier>

1 is a perspective view showing the appearance of an air purifier according to an embodiment of the present invention.

Referring to FIG. 1 , an air purifier 10 according to an embodiment of the present invention includes a blower 100 or 200 that generates air flow and a flow that changes the discharge direction of the air flow generated by the blower device 100 or 200. Adjustment device 300 is included.

For example, the blowers 100 and 200 may include either the first blower 100 generating the first air flow or the second blower 200 generating the second air flow.

As another example, the blower devices 100 and 200 may include both the first blower 100 generating the first air flow and the second blower 200 generating the second air flow. In this case, the first blower 100 and the second blower 200 may be arranged in a vertical direction. In detail, the second blower 200 may be disposed above the first blower 100 .

In this embodiment, the first air flow forms a flow that sucks indoor air existing on the lower side of the air purifier 10, and the second air flow forms a flow on the upper side of the air purifier 10. forms a flow that sucks in the indoor air present in the

The first and second blowers 100 and 200 may be referred to as a "first air cleaning module 100" and a second air cleaning module 200, respectively, in that they perform a function of purifying air in a clean space. In addition, the first blower 100 may be referred to as a "lower air cleaning module" or "lower module" in that it is disposed below the air purifier 10, and the second blower ( 200) may be referred to as an "upper air cleaning module" or "upper module" in that it is disposed above the air purifier 10.

The air purifier 10 includes cases 101 and 201 forming an exterior.

In detail, the cases 101 and 201 include the first case 101 forming the exterior of the first blower 100 . The first case 101 may have a cylindrical shape. And, the upper part of the first case 101 may be configured to have a smaller diameter than the lower part. That is, the first case 101 may have a conical shape with a truncated end.

As another example, the cases 101 and 201 may have the shape of a rectangular column having a cylindrical or rectangular cross section, or may have various other shapes.

The first case 101 includes a first separator 101a in which two parts constituting the first case 101 are coupled or separated. A locking device such as a locking protrusion or a magnet member may be provided in the first separator 101a. The two parts may be detachably coupled to the first separator 101a by the locking device.

In the first case 101, a first suction part 102 through which air is sucked is formed. The first suction part 102 includes a through hole formed by penetrating at least a portion of the first case 101 . The first suction part 102 is formed in plurality.

The plurality of first intake parts 102 are evenly formed in the circumferential direction along the outer circumferential surface of the first case 101 so that air can be sucked in from any direction with respect to the first case 101 . That is, based on the center line in the vertical direction passing through the inner center of the first case 101, air may be sucked in in a direction of 360 degrees.

As described above, since the first case 101 is formed in a cylindrical shape and a plurality of first suction parts 102 are formed along the outer circumferential surface of the first case 101, the intake amount of air can be increased. In addition, by avoiding the hexahedral shape having a corner portion, as in the case of a conventional air purifier, there is an effect of reducing flow resistance to the intake air.

The air sucked through the first suction part 102 may flow in a substantially radial direction from the outer circumferential surface of the first case 101 . define the direction Referring to FIG. 1 , the vertical direction is referred to as an axial direction, and the horizontal direction is referred to as a radial direction. The axial direction may correspond to the direction of the central axis of the first fan 160 and the second fan 260 to be described later, that is, the direction of the motor shaft of the fan. Also, the radial direction may be understood as a direction perpendicular to the axial direction. Further, the circumferential direction is understood as a virtual circular direction formed when rotating with the axial direction as the center and the distance in the radial direction as the rotation radius.

The first blower 100 further includes a base 20 provided on the lower side of the first case 101 and placed on the ground. The base 20 is spaced downward from the lower end of the first case 101 and is positioned. And, in the separation space between the first case 101 and the base 20, a base suction part 103 is formed. The air sucked through the base suction part 103 may flow upward through the suction port 112 of the suction grill 110 (see FIG. 2) provided on the upper side of the base 20.

That is, the first blower 100 includes a plurality of suction units 102 and 103 . Air present in the lower part of the indoor space can be easily introduced into the first blower 100 through the plurality of suction units 102 and 103 . Thus, the intake amount of air can be increased.

A first discharge unit 105 is formed above the first blower 100 . The first discharge part 105 may be formed in the first discharge grill 195 of the first discharge guide device 190 (see FIG. 2 ) provided in the first blower 100 . The first discharge guide device 190 forms the outer appearance of the upper end of the first blower device 100 . Air discharged through the first discharge part 105 may flow upward in the axial direction.

The cases 101 and 201 include a second case 201 forming an external appearance of the second blower 200 . The second case 201 may have a cylindrical shape. And, the upper part of the second case 201 may be configured to have a smaller diameter than the lower part. That is, the second case 201 may have a conical shape with a truncated end.

The second case 201 includes two parts that can be separated or combined through the second separation part 201a equipped with a locking device. Like the first case 101, the second case 201 may be configured to be openable. For detailed description, the description of the first case 101 is used.

The diameter of the lower end of the second case 201 may be smaller than the diameter of the upper end of the first case 101 . Therefore, in view of the overall shape of the cases 101 and 201, the lower cross-sectional area of the cases 101 and 201 is larger than the upper cross-sectional area, and thus the air purifier 10 can be stably supported on the ground.

In the second case 201, a second suction part 202 through which air is sucked is formed. The second suction part 202 includes a through hole formed by penetrating at least a portion of the second case 201 . The second suction part 202 is formed in plurality.

The plurality of second suction parts 202 are evenly formed in the circumferential direction along the outer circumferential surface of the second case 201 so that air can be sucked in from any direction with respect to the second case 201 . That is, air can be sucked in in a direction of 360 degrees based on the center line in the vertical direction passing through the inner center of the second case 201 .

As described above, since the second case 201 is formed in a cylindrical shape and a plurality of second intake parts 202 are formed along the outer circumferential surface of the second case 201, the intake amount of air can be increased. In addition, by avoiding the hexahedral shape having a corner portion, as in the case of a conventional air purifier, there is an effect of reducing flow resistance to the intake air. The air sucked through the second suction part 202 may flow in a substantially radial direction from the outer circumferential surface of the second case 201 .

The air purifier 10 includes a partitioning device 400 provided between the first blowing device 100 and the second blowing device 200 . By means of the partitioning device 400 , the second blowing device 200 may be positioned to be spaced apart from the first blowing device 100 above.

The flow control device 300 may be installed above the second blower 200 . Based on the air flow, the air passage of the second blower 200 may communicate with the air passage of the flow control device 300 . The air passing through the second blower 200 passes through the air flow path of the flow control device 300 and may be discharged to the outside through the second discharge unit 305 . The second discharge part 305 is formed at the upper end of the flow control device 300 .

The flow control device 300 may be movably provided. In detail, as shown in FIG. 1, the flow control device 300 is in a lying state (first position) or, as shown in FIG. 4, a state in which it is erected at a predetermined angle (second position). can be in

Also, a display unit 600 displaying operation information of the air purifier 10 is provided above the flow control device 300 . The display unit 600 means a display device. The display unit 600 can move together with the flow control device 300 .

FIG. 2 is a perspective view showing an internal configuration of an air purifier according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line AA′ of FIG. 2 .

Referring to FIGS. 2 and 3 , the first blower 100 according to the embodiment of the present invention includes a base 20 and a suction grill 110 disposed above the base 20 .

The base 20 includes a base body 21 placed on the ground and a base protrusion 22 protruding upward from the base body 21 and placing the suction grill 110 thereon. The base protrusions 22 may be provided on both sides of the base 20 .

By the base protrusion 22, the base body 21 and the suction grill 110 are spaced apart from each other. Between the base 20 and the suction grill 110, a base suction portion 103 forming an air suction space is formed.

The suction grill 110 includes a substantially ring-shaped grill body 111 and a rim portion protruding upward from an outer circumferential surface of the grill body 111 . Due to the configuration of the grill body 111 and the rim portion, the suction grill 110 may have a stepped configuration.

The suction grill 110 includes a suction portion 112 formed on the rim portion. The suction part 112 is configured to protrude upward along the circumference of the rim part and may be configured to extend in the circumferential direction. And, inside the suction part 112, a plurality of suction holes 112a are formed. The plurality of suction holes 112a may communicate with the base suction part 103 .

Air sucked through the plurality of suction holes 112a and the base suction part 103 may pass through the first flutter member 120 . The first filter member 120 has a cylindrical shape and may have a filter surface for filtering air. Air passing through the plurality of suction holes 112a may pass through the outer circumferential surface of the cylindrical first filter member 120 and be introduced into the inside.

The first blower 100 further includes a first filter frame 130 forming a mounting space for the first filter member 120 . In detail, in the first filter frame 130, the first frame 131 forming the lower part of the first filter frame 130 and the second frame 132 forming the upper part of the first filter frame 130 ) are included. The first and second frames 131 and 132 may have a substantially ring shape.

The first filter frame 130 further includes a first filter support 135 extending upward from the first frame 131 toward the second frame 132 . A plurality of first filter supports 135 are provided, and the plurality of first filter supports 135 may be arranged in a circumferential direction and connected to the edge portions of the first and second frames 131 and 132 . An installation space for the first filter member 120 is defined by the first and second frames 131 and 132 and the plurality of first filter supports 135 .

In the mounting space, the first filter member 120 may be detachably mounted. The first filter member 120 has a cylindrical shape, and air may be introduced through an outer circumferential surface of the first filter member 120 . In the process of passing through the first filter member 120, impurities such as fine dust in the air may be filtered out. Since the first filter member 120 has a cylindrical shape, air can be introduced from any direction based on the first filter member 120 . Thus, the filtering area of air can be increased.

The first blower device 100 further includes a first fan housing 150 installed at an outlet side of the first filter member 120 . A housing space 152 in which the first fan 160 is accommodated is formed in the first fan housing 150 . Also, the first fan housing 150 may be supported by the first filter frame 130 .

The first blower 100 further includes an ionizer for removing or sterilizing odor particles in the air. The ionizer is coupled to the first fan housing 150 and can act on the air flowing inside the first fan housing 150 .

The sensor device 137 and the ionizer may also be installed in a second blower 200 to be described later. As another example, the sensor device 137 and the ionizer may be installed in one of the first blower 100 and the second blower 200 .

The first fan 160 includes a centrifugal fan that introduces air in an axial direction and discharges air upward in a radial direction.

In detail, the first fan 160 includes a hub 161 to which the rotation shaft 165a of the first fan motor 165, which is a centrifugal fan motor, is coupled, and a shroud 162 disposed spaced apart from the hub 161. ) and a plurality of blades 163 disposed between the hub 161 and the shroud 162 are included. The first fan motor 165 may be coupled to an upper side of the first fan 160 .

The first blower 100 further includes a first air guide device 170 coupled to the upper side of the first fan 160 to guide the flow of air passing through the first fan 160. .

The first air guide device 170 includes an outer wall 171 having a cylindrical shape and an inner wall 172 positioned inside the outer wall 171 and having a cylindrical shape. The outer wall 171 is disposed to surround the inner wall 172 . A first air passage through which air flows is formed between the inner circumferential surface of the outer wall 171 and the outer circumferential surface of the inner wall 172 .

The first air guide device 170 includes a guide rib 175 disposed in the first air passage. The guide rib 175 extends from the outer circumferential surface of the inner wall 172 to the inner circumferential surface of the outer wall 171 . A plurality of guide ribs 175 may be spaced apart from each other. The plurality of guide ribs 175 perform a function of guiding the air introduced into the first air passage of the first air guide device 170 through the first fan 160 upward.

The first air guide device 170 further includes a motor accommodating portion 173 extending downward from the inner wall 172 and accommodating the first fan motor 165 . The motor accommodating part 173 may be inserted inside the hub 161 .

The first fan motor 165 may be supported on the upper side of the motor accommodating part 173 . Further, the rotational shaft of the first fan motor 165 extends downward from the first fan motor 165, penetrates the bottom surface of the motor accommodating part 173, and is coupled to the shaft coupling part of the hub 161. It can be.

The first blower device 100 is coupled to the upper side of the first air guide device 170 and guides the air passing through the first air guide device 170 to the first discharge guide device 190. 2 air guide device 180 is further included.

The second air guide device 180 includes a first guide wall 181 having a substantially cylindrical shape, and a second guide wall positioned inside the first guide wall 181 and having a substantially cylindrical shape ( 182) are included. The first guide wall 181 may be disposed to surround the second guide wall 182 .

A second air passage through which air flows is formed between the inner circumferential surface of the first guide wall 181 and the outer circumferential surface of the second guide wall 182 . The air flowing through the first air passage of the first air guide device 170 passes through the second air passage and flows upward. The second air passage 185 may be referred to as a "discharge passage". Also, a first discharge unit 105 is disposed above the second air passage.

A first space portion accommodating at least a portion of the PCB device 500 is formed inside the second guide wall 182 having a cylindrical shape.

The first blower device 100 is disposed on the upper side of the second air guide device 180, that is, on the outlet side of the air flow passing through the second air guide device 180 based on the air flow path, A first discharge guide device 190 for guiding air discharge to the outside of the air purifier 10 is further included. The first discharge guide device 190 has a first discharge portion 105 through which air is discharged.

A partitioning device 400 is provided between the first blowing device 100 and the second blowing device 200 . The partitioning device 400 includes a partitioning plate 430 for separating or blocking the air flow generated by the first blower 100 and the air flow generated by the second blower 200. . By the partition plate 430, the first and second blowers 100 and 200 may be spaced apart from each other in the vertical direction.

That is, a separation space in which the partition plate 430 is located is formed between the first and second blowers 100 and 200 . The first discharge guide device 190 of the first blower 100 is located at the lower end of the separation space, and the lever support device 560 of the second blower 200 is located at the upper end of the separation space. It can be.

The separation space may be partitioned into an upper space and a lower space by the partition plate 430 . The lower space is a space through which the air discharged from the first discharge part 105 of the first discharge guide device 190 flows to the outside of the air purifier 10, and the upper space is a user It is understood as a gripping space into which a hand can be inserted when moving the air purifier 10. The air discharged from the first discharge unit 105 is guided by the partition plate 430 and flows out of the air purifier 10, and is prevented from flowing into the second blower 200. there is.

4 is a perspective view showing an excerpt of a flow control device, which is a part of the components of the present invention. And, Figures 5 and 6 are cross-sectional views showing the air flow through the air cleaner when the flow control device according to an embodiment of the present invention is in the first position and the second position, respectively.

4 shows a state in which the flow control device 300 protrudes upward from the second discharge guide device 280, that is, the rotation guide member 370 rotates upward and the fan housing 310 is erected upward. It shows the state (second position).

The flow control device 300 is rotatably operated up and down in the direction “B” shown in FIG. 4, and may be in the first position (see FIG. 1) or the second position. When the flow control device 300 is in the first position, the inlet grill 325 is seated on the upper surface of the second discharge grill 288 . On the other hand, when the flow control device 300 is in the second position, the inlet grill 325 may be spaced upward from the upper surface of the second discharge grill 288 .

The third fan 330 may selectively operate depending on whether the flow controller 300 is in the first position or the second position.

In detail, referring to FIG. 5 , in a state in which the flow control device 300 is in the first position, the first and second fans 160 and 260 may rotate to generate air flow. By the operation of the first fan 160, air intake and discharge (first flow) may be generated in the lower part of the air purifier 10. In addition, by the operation of the second fan 260, air intake and discharge (second flow) may be generated at the upper part of the air purifier 10. The first flow and the second flow may be separated by the partitioning device 400 .

And, the third fan 330 can be selectively operated. When the third fan 330 operates, the second flow may be more strongly generated. That is, a strong discharge air flow is generated at the upper part of the air purifier 10 by the second fan 260 and the third fan 330 and can be discharged through the second discharge unit 305 . Of course, the third fan 330 may not operate.

Meanwhile, in a state in which the flow controller 300 is in the second position, the first and second fans 160 and 260 rotate to generate the first and second flows. Also, the third fan 330 may operate. The second position is understood to be a position inclined upward by a set angle with respect to the first position of the flow control device 300 . For example, the setting angle may be about 60 degrees.

In detail, referring to FIG. 6 , by the operation of the third fan 330, at least some of the air discharged through the second discharge guide device 280 moves inside the third fan housing 310. and may be discharged from the second discharge unit 305 via the third fan 330. By this action, the purified air can reach a location far away from the air purifier 10 .

And, the flow control device 300, in the state in the second position, can be rotated in the left and right directions relative to the axial direction. 4 shows a state in which the flow control device 300 is positioned so as to look in one direction (a left direction based on FIG. 4) in a state in the second position. Here, the one direction may be a direction toward the left 45 degrees with the front of the air purifier 10 as the center.

The flow control device 300 may be positioned to look in another direction in the second position. Here, the other direction may be a direction toward the right 45 degrees with the front of the air purifier 10 as the center. That is, the rotation angle of the flow control device 300 may form about 90 degrees.

In this way, since the flow control device 300 can be rotated in the left and right directions based on the axial direction, there is an effect that the discharge air flow can be sent to a long distance in various directions with the air purifier 10 as the center.

7 is a perspective view showing air flow when an air cleaning module and a flow controller according to an embodiment of the present invention operate.

In the air purifier 10 according to an embodiment of the present invention, the lower module 100, the upper module 200, and the flow regulator 300 may be controlled to operate. For example, among the operation modes of the air purifier 10, each of these operations may be possible in a manual operation mode and an automatic operation mode.

When the lower module 100, the upper module 200, and the flow control device 300 are operated, the lower module 100 and the upper module 200 pass through the first and second suction parts 102 and 202, respectively. can be inhaled. Contaminated air sucked into the lower module 100 is purified while passing through the first filter member 120, and can be discharged to a clean space through the first discharge part 105 through the first fan 160. .

Then, the polluted air sucked into the upper module 200 is purified while passing through the second filter member 220, and is discharged to the clean space through the second discharge part 305 through the second fan 260. can At this time, since the third fan 330 of the flow controller 300 can be driven together, the air passing through the second fan 260 passes through the third fan 330 and has a stronger blowing force. can have

The flow control device 300 may have an upward rotational movement by the second guide mechanism and may be inclined upwardly of the second module 200 . Accordingly, air may be discharged toward the upper side with respect to the air purifier 10 . Therefore, clean air can be discharged from the air purifier 10 to a relatively long distance.

In addition, since the flow control device 300 rotates in the left and right directions by the first guide mechanism (refer to A in FIG. 4 ), the flow control device 300 moves to the left and right areas with respect to the air purifier 10 . Clean air can be discharged.

Since all three modules provided in the air purifier 10 are operated, the amount of air circulated through the air purifier 10, that is, the cleaning capacity, is reduced when only the lower module 100 is operated, or when the upper and lower modules 100 and 200 are operated. Compared to the case of driving, it may be relatively large. Therefore, when the cleaning space is relatively large, for example, when cleaning an office or a large living room (room), the user may select the manual operation mode and perform the circulation mode.

For example, the cleaning capacity of the air purifier 10 may have Q3 (m3) per minute. Of course, the cleaning capacity (Q3) may vary somewhat depending on the rotational speed of the first fan (160, 260, 330). Also, the cleaning capacity Q3 may have a larger value than the cleaning capacity Q1 or the cleaning capacity Q2.

According to the operation of the air purifier, there is an advantage in that it is possible to operate the air purifier optimized according to the size of the clean space or the degree of air pollution.

8 is a block diagram showing a controllable configuration of an air purifier according to an embodiment of the present invention.

Referring to FIG. 8 , the air purifier 10 according to the embodiment of the present invention includes a sensor device 237. The sensor device 237 may include a dust sensor 237a. The dust sensor 237a may detect the amount of impurities or dust smaller than a set size in the air sucked into the upper module 200 . For example, the dust sensor 237a may be configured to detect the amount of ultra-fine dust of 2.5 μm or less. Accordingly, the dust sensor 237a may be referred to as a "PM2.5 dust sensor".

The sensor device 237 may further include a gas sensor 237b. The gas sensor 237b may detect the amount of harmful gas, for example, a combustible gas, a reducing gas, and an organic solvent gas included in the air sucked into the upper module 200 .

air quality level One 2 3 4 5 6 7 Pollution degree (cleanliness) good commonly bad very bad display color green yellow Orange Red

Based on the information sensed by the dust sensor 237a and the gas sensor 237b, an air condition, that is, an air quality level may be determined. In detail, the air quality level may be determined by combining values output from the dust sensor 237a and the gas sensor 237b. For example, the air quality level may be classified from level 1 to level 7, and the higher the level, the poorer the air quality may be recognized.

And, in the section where the air quality level is 1 to 2, the air pollution level (cleanliness) is "good condition", and in the section where the air quality level is 3 to 4, the air pollution level (cleanliness level) is "normal condition", and the air quality In the section where the level is 5 to 6, the air pollution level (cleanliness) is "poor", and in the section where the air quality level is 7, the air pollution (cleanliness) can be recognized as "very bad".

Level information about air pollution may be displayed on the display unit 600 . For example, the air pollution information may be displayed in color. In detail, when it is recognized that the air pollution level is "good", the display unit 600 outputs "green".

On the other hand, when the air pollution level is recognized as being in a "normal state", the display unit 600 outputs "yellow", and when the air pollution level is recognized as being in a "normal state", the display unit 600 displays "orange". can output And, when it is recognized that the air pollution level is "very bad", the display unit 600 outputs "red". As such, since the air pollution information is displayed in distinguishable colors, the user can intuitively recognize the air quality information.

The air purifier 10 further includes an input unit 710 through which a user can input a predetermined command. The input unit 710 includes a power input unit 711 capable of turning on or off the power of the air purifier 10 .

The input unit 710 further includes an operation mode input unit 713 capable of inputting a command related to the operation mode of the air purifier 10 when the power of the air purifier 10 is turned on.

The operation mode of the air purifier 10 may include a manual operation mode and an automatic operation mode. The user may select one of the manual driving mode and the automatic driving mode through the driving mode input unit 713 . For example, the driving mode input unit 713 may include a separate input unit capable of selecting each driving mode.

When the manual operation mode is selected through the operation mode input unit 713, the user may input the number of modules (devices) to be operated or wind speed (air volume). In detail, the input unit 710 further includes a clean mode input unit 715 that determines the number of modules to be operated. The module may include three modules, that is, a first air cleaning module 100, a second air cleaning module 200, and a flow controller 300. The three modules can be operated selectively or independently.

The clean mode input unit 715 is configured to determine the number of modules to be operated among the three modules. In detail, the clean mode input unit 715 may include a "single clean input unit", a "dual clean input unit", and a "cyclic clean input unit". The single cleaning input unit is an input unit that can be input to operate the first air cleaning module 100 among the three modules, and the dual cleaning input unit is used to operate the first and second air cleaning modules 100 and 200. It is understood as an input unit that can be entered for. And, the circulation cleaning input unit is understood as an input unit that can be input to operate the first and second air cleaning modules 100 and 200 and the flow control device 300 .

When the single cleaning input unit is input, the air purifier 10 is operated in a "single mode" in which the lower module 100 is independently operated, and when the dual cleaning input unit is input, the air purifier 10 operates in the upper and lower modules ( 100 and 200) can be operated in “dual mode” in which combined operation is performed. In addition, when the circulation cleaning input unit is input, the air purifier 10 may be operated in a “circulation mode” in which a combined operation of the upper and lower modules 100 and 200 and the flow control device 300 is performed. Here, the operation of the flow control device 300 in the "circulation mode" means a case in which the flow control device 300 is operated in a state where the flow control device 300 protrudes obliquely upward from the upper module 200 .

The input unit 710 further includes an air volume input unit 717 capable of determining the intensity of air discharged from the module to be operated, that is, the air volume. After determining the module to be operated through the clean mode input unit 715, the user can determine the air volume discharged from the corresponding module through the air volume input unit 717. For example, wind volume may be divided into "weak wind", "medium wind" and "strong wind". Of course, the number of revolutions of the first fan 160 , the second fan 260 , or the third fan 330 may be determined according to the determined air volume.

Meanwhile, when the automatic operation mode is selected through the operation mode input unit 713, the air purifier 10 determines the number of modules to be operated and wind speed based on the air pollution level recognized by the sensor device 237. (air volume) can be determined.

For example, when the air pollution level is “good” or “normal”, it is determined that the first air cleaning module 100 among the modules is in operation, and the air pollution level is “bad”, It may be determined that the first and second air cleaning modules 100 and 200 among the modules are operated.

The pollution level of the “normal state”, that is, the air quality level 4 is understood as a first standard pollution level at which only the first air cleaning module 100 can be operated. In addition, the pollution level of the “bad state”, that is, the air quality level 6 is understood as a second standard pollution level at which the first and second air cleaning modules 100 and 200 can be operated. That is, when the pollution level is higher than the first standard pollution level and lower than the second standard pollution level, the first and second air cleaning modules 100 and 200 may be operated.

At a pollution level equal to or higher than the second reference pollution level, all of the three modules may be operated. In detail, when the air pollution level is “very bad”, it may be determined that all of the three modules, that is, the first and second air cleaning modules 100 and 200 and the flow controller 300 are operated. When the flow control device 300 is determined as a module to be operated, the flow control device 300 may move to the second position and be operated.

When a module to be operated is determined based on the air pollution level information, the amount of air discharged from the module for which operation is determined may be set in advance. For example, the preset wind volume may be “weak wind”.

On the other hand, in the process of operating a certain module with "weak wind" through the automatic operation mode, when the air volume input unit 717 is input, the air volume discharged from the operated module can be adjusted according to preset information. The reason why the user inputs the air volume input unit 717 is that it can be recognized that the user desires a stronger air volume.

For example, when the air pollution level is "good", the first air cleaning module 100 can maintain a good air cleaning level even when the first air cleaning module 100 is operated with "weak wind", so the first air cleaning module 100 ) does not change the air volume. In addition, a guide message may be output to the user through the display unit 600 . For example, the guide message may include "The air condition is good, and it is possible to maintain a clean state only with the current operation". Nonetheless, when the user requests a strong air volume, the display unit 600 may guide conversion to the "manual driving mode".

Meanwhile, when the air pollution level is "normal", the air volume of the first air cleaning module 100 may be adjusted to "neutral". In addition, a message indicating that the air volume of the first air cleaning module 100 has been adjusted from "light wind" to "medium wind" may be output to the user.

On the other hand, when the air pollution level is "poor", the air volume of the first and second air cleaning modules 100 and 200 may be adjusted to "low air", respectively. In addition, a message indicating that the air volume of the first and second air cleaning modules 100 and 200 has been adjusted from “light air” to “medium air” may be output to the user.

Meanwhile, when the air pollution level is in a "very bad state", the air volume of the first and second air cleaning modules 100 and 200 and the flow controller 300 may be adjusted to "strong wind", respectively. In addition, a message indicating that the air volume of the first and second air cleaning modules 100 and 200 and the flow controller 300 has been adjusted from "weak wind" to "strong wind" can be output to the user.

The air purifier 10 further includes a memory unit 720 for storing preset information for operation of the air purifier 10 . Information described in [Table 1] may be stored in the memory unit 720. That is, the value sensed by the sensor device 237, mapping information on air quality level, mapping information on pollution level, and mapping information on display color may be stored. In addition, the memory unit 720 may store information about the number of modules to be operated and air volume when the automatic operation mode is selected.

The air purifier 10 includes a first fan motor 165 based on information detected by the sensor device 237, information input through the input unit 710, or information stored in the memory unit 720. , The controller 700 for controlling driving of the second fan motor 265, the third fan motor 335, the first gear motor 363, the second gear motor 367, or the display unit 600 is further included. do. The control unit 700 may determine whether or not to operate the three modules according to the operation mode of the air purifier 10 and determine air volume of the three modules according to input or pre-stored information.

<Battery>

On the other hand, the air purifier 10 of the present invention configured as described above can operate in connection with an external power source by connecting a power cord to an outlet, and can operate through a battery 800 provided therein.

That is, the air purifier 10 according to the present invention may operate in a wired or cordless manner.

The battery 800 is provided in the air purifier 10 to supply power required for overall operation of the air purifier 10 .

For example, the battery 800 may include a lithium battery. Also, for reasons of weight and stability, it may be placed at the bottom of the air purifier 10.

In addition, the input unit 710 may include a battery use instruction unit 714 so that the user can instruct the use of the battery.

The battery usage indicator 714 may be provided in the form of a button. In particular, it may be provided in the form of a touch button.

Also, the control unit 700 may include a battery life detecting unit 730 that detects the life of the battery 800, and the display unit 600 may include a battery detected by the battery life detecting unit 730 ( 800) may be added to display the lifespan. In addition, the display unit 600 may also have a function of displaying a discharge notification, a charge request, and the like.

In addition, the controller 700 has a switch (not shown) for supplying power supplied from the external power source to the battery 800 or to the air purifying module, flow control device, input unit, display device, etc. for the operation of the air purifier. city) may be further included.

Also, the battery 800 may include a plurality of battery cells. The plurality of battery cells may be secondary batteries capable of being charged and discharged.

In addition, the controller 700 may include a charging module (not shown) for charging the battery 800 . The charging module (not shown) may include a transformer that transforms an AC voltage input from an external power source and an AC-DC converter that converts the AC voltage output from the transformer into a DC voltage.

Meanwhile, the controller 700 controls the air purifier 10 to use the battery 800 as a power source in a state in which it is not connected to an external power source.

In addition, the control unit 700 determines whether to use the battery 800 according to the user's command input through the input unit 710 while the air purifier 10 is connected to an external power source, and determines whether the battery 800 is used. ), the battery 800 may be used or external power may be used without using the battery 800.

In detail, when a battery use command is input through the battery use indicator 714 while the air purifier 10 is connected to an external power source, the air purifier uses the power of the battery 800 without using an external power source. (10) controls to work.

In addition, in the above state, when a command to stop using the battery is input through the input unit 710, the controller 700 stops using the power of the battery 800 and uses only an external power source, so that the air purifier 10 can also be controlled to operate.

In addition, even when a separate battery use command is not input through the battery use indicator 714 while the air purifier 10 is connected to an external power source, the control unit 700 does not use a battery, The air purifier 10 is controlled to operate using power.

That is, according to the present invention, in a state in which the air purifier is connected to an external power source, the user can directly select whether to use a battery or an external power source.

Meanwhile, the battery life detection unit 730 detects the life of the battery 800 in real time. Here, the battery life should be interpreted in a different way from the remaining battery capacity.

As in the present invention, when a battery is installed therein for the wireless operation function of the air purifier, while using the air purifier wirelessly, the number of charging and discharging of the battery is increased, and accordingly, the life of the battery is shortened. can only be

In addition, as the lifespan of the battery is shortened, when the wireless air purifier is used, the usable time of the air purifier in a fully charged state gradually decreases, resulting in user dissatisfaction.

Therefore, when the usable time of the air purifier in a wireless state is reduced due to a decrease in battery life through repeated use of the battery, it is necessary to inform the user of the corresponding information.

In the case of the present invention, the life of the battery 800 is detected in real time through the battery life detection unit 730, and in the controller 700, the battery life detected by the battery life detection unit 730 is stored in the memory unit ( 720), a battery replacement notification signal is output to the display unit 600 to notify the user.

Accordingly, the user can check the remaining life of the battery in real time, and when the remaining life of the battery falls below a reference value set in the memory, a battery replacement notification is output so that the user can recognize this and replace the battery.

For example, the battery life detection unit 730 may detect the life of the battery 800 by measuring the internal resistance of the battery 800 .

As is well known, the battery's internal resistance value increases as the usage time increases due to the nature of the battery. In addition, as the size of the internal resistance of the battery increases, it becomes increasingly difficult to maintain the output voltage in a fully charged state. And, as the voltage holding time capable of operating the product decreases as described above, the lifespan of the battery decreases, and the usable time of the battery gradually decreases when the battery is fully charged.

Therefore, when the internal resistance of the battery is higher than the reference value compared to the initial specification of the battery, it is necessary to notify the user that the battery needs to be replaced.

According to the present invention, since the life of the battery is detected by measuring the internal resistance of the battery and a battery replacement notification is output to the user, the usable time of the battery is shortened and the inconvenience felt by the user can be resolved.

In addition, the battery life detection unit 730 measures internal resistance of a fully charged battery.

If the internal resistance of the battery is measured when the battery is not in a fully charged state, the internal resistance value of the battery is inevitably measured differently according to the remaining capacity of the battery.

Accordingly, the battery life detection unit 730 measures the internal resistance of a fully charged battery so that the internal resistance of the battery can be measured under uniform conditions.

In addition, the battery life detection unit 730 measures internal resistance of the battery 800 in a state in which the battery 800 is connected to an external power source.

If the external power is not connected and the battery is used to operate the air purifier, when the internal resistance of the battery is measured, the internal resistance value may not be accurately measured.

Accordingly, the battery life detection unit 730 measures the internal resistance of the battery 800 when the battery 800 is connected to an external power source and the air purifier is operated by the external power source.

In addition, the battery life detection unit 730 measures the internal resistance of the battery 800 in a state in which operation of the product is stopped.

If the internal resistance of the battery is measured while the air purifier is operating, the internal resistance value may not be accurately measured.

Accordingly, the battery life detection unit 730 measures the internal resistance of the battery 800 when the battery 800 is connected to an external power source and the air purifier is operated by the external power source.

In addition, the battery life detection unit 730 performs a battery life test when the battery usage time is 100 hours or more.

If the battery usage time is less than 100 hours, there is no need to replace the battery, and since the performance of the battery does not change significantly compared to the initial period, the battery life detection unit 730 checks the battery life only when the battery usage time is 100 hours or more. proceed with

In addition, the control unit 700 displays the display unit 600 when it is determined that the life of the battery is equal to or less than the reference value, no external power is connected to the battery 800, and the product is operated only using the battery 800. Outputs a battery replacement notification signal.

That is, the control unit 700 outputs a battery replacement notification to the display unit 600 only when the air purifier operates with the battery 800 in a state in which it is determined that the battery life is equal to or less than the reference value.

On the other hand, the control unit 700 controls the display unit 600 not to separately output a battery replacement notification when the air purifier is operated by an external power source in a state in which it is determined that the life of the battery is equal to or less than the reference value.

In addition, the controller 700 outputs a battery replacement notification signal to the display unit 600 when it is determined that the battery life 800 is 10% or less.

Here, in a situation where the battery is not used, the battery life is 100%, and when the battery life detected in real time compared to the initial battery life reaches 10%, the controller 700 sends a battery replacement notification signal to the display unit 600. print out

In addition, the controller 700 may output the remaining battery life to the display unit 600 when the life of the battery 800 reaches 50% or 80%.

In addition, the controller 700 may stop using the battery when the life of the battery is equal to or less than a reference value.

For example, the controller 700 may forcibly terminate operation of the air purifier by using the battery when battery use is detected in a state where the battery life time detected in real time reaches 10%.

In addition, the display unit 600 may be provided in the air purifying module or the flow control device.

In addition, the display unit 600 is provided in an external terminal such as a smart phone, and the control unit 700 can wirelessly communicate with the external terminal in a manner such as Wi-Fi or Bluetooth.

Accordingly, the user can check the battery life in real time and receive a battery replacement notification in the external terminal.

Hereinafter, a 'control method' of detecting the remaining life of the battery and outputting a battery replacement notification to the user by measuring the internal resistance of the battery as described above will be described.

<Control method>

Hereinafter, the operation process of the air purifier for each situation will be described.

As an example, an operation process of an air purifier in a situation where an external power source is not connected will be described.

As described above, in a state in which an external power source is not connected, the air purifier has no choice but to be operated using a battery.

In detail, when the air purifier is turned on by a user's operation, the battery charging amount detection unit 730 detects the charging amount of the battery 800 in real time, outputs it to the display unit 600, and informs the user.

Then, the air purifier 10 is driven by using the battery 800 .

As described above, in a state in which the air purifier 10 is operated by the battery 800, when the battery 800 reaches a discharge warning level, the controller 700 may notify the user through the display unit 600. Also, when the battery 800 is discharged, the air purifier 10 is automatically turned off. In this embodiment, the battery cannot be charged until an external power source is connected to the air purifier 10 .

As another example, an operation process of an air purifier in a situation where an external power source is connected and a battery is not used will be described.

Similarly at this time, when the air purifier is turned on by a user's operation, the battery charge amount detection unit 730 detects the charge amount of the battery 800 in real time, outputs it to the display unit 600, and informs the user. .

After that, since the external power is connected, the air purifier is driven by the external power without using the battery. At this time, charging of the battery may be selectively performed.

As described above, when a battery is installed therein for the wireless operation function of the air purifier, while using the air purifier wirelessly, the number of charging and discharging of the battery increases, and accordingly, the life of the battery may be shortened. there is only

In addition, as the lifespan of the battery is shortened, when the wireless air purifier is used, the usable time of the air purifier in a fully charged state gradually decreases, resulting in user dissatisfaction.

Therefore, when the usable time of the air purifier in a wireless state is reduced due to a decrease in battery life through repeated use of the battery, it is necessary to inform the user of the corresponding information.

An air purifying module and a battery, a display unit for outputting various information about the battery state, a battery life detection unit for detecting the life of the battery, and when the detected battery life is less than a reference value stored in the memory unit, It may be a control method of an air purifier including a control unit outputting a battery replacement notification signal to the display unit.

A control method of an air purifier according to the present invention includes a first step of determining whether the battery is fully charged (S110), and a second step of determining whether an external power source is connected when the battery is fully charged (S110). S120), the third step of determining whether the product is in operation when the external power is connected (S130), and the fourth step of detecting the battery life when the product is not in operation and is in a stopped state ( S140), and a fifth step of comparing the detected battery life with a reference value input to the memory and determining whether the detected battery life is equal to or less than the reference value (S150), and notifying battery replacement through the display unit when the battery life is equal to or less than the reference value. A sixth step (S160) of outputting is included.

In addition, in the fourth step (S140), the remaining life of the battery is detected by measuring the internal resistance of the battery.

In the fourth step (S140), the battery life may be detected by comparing the internal resistance value of the battery according to the battery life stored in the memory unit with the detected internal resistance of the battery.

In the sixth step (S160), when the life of the battery is 10% or less, a battery replacement notification may be output to the display unit.

Further, in the sixth step ( S160 ), when the life of the battery exceeds 10%, the control unit may output the remaining battery life to the display unit. For example, the remaining lifespan may be displayed in a manner such as 50% or 80%.

In addition, if it is determined that the battery is not in a fully charged state in step S110, the battery life check may be omitted (S170).

In addition, even if the battery is in a fully charged state, if it is determined in step S120 that external power is not connected to the air purifier, the battery life check may be omitted (S170).

In addition, even if the battery is in a fully charged state and the external power is connected to the air purifier, if it is determined that the air purifier is in operation at step S130, the battery life check may be omitted (S170).

In the case of the present invention, the battery life is detected in real time, and when the detected battery life is less than a reference value, a battery replacement notification signal is output through the display device to inform the user.

Therefore, the user can check the remaining life of the battery in real time, and when the remaining life of the battery falls below the reference value, a battery replacement notification is output so that the user can recognize this and replace the battery.

According to the present invention, since the life of the battery is detected by measuring the internal resistance of the battery and a battery replacement notification is output to the user, the usable time of the battery is shortened and the inconvenience felt by the user can be resolved.

Claims (15)

An air purification module having a suction fan and a filter member;
a flow control device having a circulation fan disposed above the air purification module;
a battery provided in the air purifying module to supply power to the air purifying module and the flow control device;
a display unit outputting various types of information about the battery state;
a battery life detector detecting the life of the battery;
And a control unit outputting a battery replacement notification signal to the display unit when the detected battery life is equal to or less than a reference value stored in a memory unit,
The battery life detection unit detects the life of the battery by measuring the internal resistance of the battery,
The battery life detection unit measures the internal resistance of the battery while the battery is in a fully charged state and connected to an external power source.

delete delete delete According to claim 1,
The battery life detection unit measures the internal resistance of the battery in a state in which the operation of the product is stopped.
According to claim 1,
The control unit,
The air purifier outputs a battery replacement notification signal to the display unit when it is determined that the life of the battery is less than the reference value, external power is not connected to the battery, and the product is operated using the battery.
According to claim 1,
The control unit,
When the battery life is determined to be 10% or less, the air purifier outputs a battery replacement notification signal to the display unit.
According to claim 1,
The control unit,
An air purifier that stops using the battery when the battery life is below the standard value.
According to claim 1,
The display unit is an air purifier provided in the air purifying module or the flow control device.
According to claim 1,
The display unit is provided in an external terminal, and the control unit wirelessly communicates with the external terminal.
According to claim 1,
An air purifier, characterized in that the air purifying module is provided in plurality and is stacked in a longitudinal direction.
In the control method of an air purifier having a battery,
A first step of determining whether the battery is in a fully charged state;
a second step of determining whether external power is connected to the air purifier when the battery is in a fully charged state;
a third step of determining whether the air purifier is in operation when external power is connected to the air purifier;
a fourth step of detecting battery life when the operation of the air purifier is stopped;
a fifth step of comparing the detected battery life with a preset reference value and determining whether the detected battery life is equal to or less than the reference value;
A control method of an air purifier comprising a sixth step of outputting a battery replacement notification to an external display unit when the battery life is less than the reference value.
According to claim 12,
The fourth step is an air purifier control method of measuring the internal resistance of the battery.
According to claim 13,
The fourth step is an air purifier control method for detecting the battery life by comparing the internal resistance value of the battery according to the battery life stored in the memory unit and the detected internal resistance of the battery.
According to claim 12,
In the sixth step, when the life of the battery is 10% or less, a battery replacement notification is output to the display unit.

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