KR20180135636A - Ventilator - Google Patents

Abstract

Provided is a ventilator capable of allowing a user to automatically and conveniently do the cleaning of a filter and extending the lifespan and the maintenance period of the filter. The ventilator according to the present invention includes: a first vent chamber (10) into which indoor air is induced; a second vent chamber (20) for discharging the indoor air to the outside; a first air supply chamber (30) into which outdoor air is induced; a second air supply chamber (40) for supplying the outdoor air to the interior; and a total heat exchanger (50) for exchanging heat between the indoor air flowing from the first vent chamber (10) to the second vent chamber (20) and the outdoor air flowing from the first air supply chamber (30) to the second air supply chamber (40). Moreover, the present invention further includes a filter (60); a bypass passage (90); and an air blower (22) for discharging air.

Description

Ventilator {VENTILATOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ventilation device having a filter cleaning control function, and more particularly, to a ventilation device that can easily and automatically perform cleaning of a filter, .

In general households and offices, there is installed a cooling and heating device to perform indoor cooling and heating according to the seasonal changes. Such a cooling and heating device includes an air conditioner for cooling and heating the indoor air by cooling and heating the indoor air , And boilers.

Since the indoor air such as a general home and office where the air conditioner and the heating device are installed is maintained in a hermetically closed state in order to improve the cooling and heating efficiency, Odor is generated or foreign matter such as dust becomes floating. Accordingly, the room air is ventilated every predetermined time to remove the odor or dust from the room. It is necessary to ventilate the contaminated room air to the outside while maintaining the room temperature, and to ventilate the fresh outdoor air to the room Device is used.

When the ventilator is used for a certain period of time, it is necessary to clean or replace the filter periodically because foreign substances are accumulated in the filter.

Generally, the prefilter is replaced at least once every 2 to 3 months, and the HEPA filter is replaced between 6 months to 1 year. The pre-filter that filters relatively large dust clogs ahead of the HEPA filter that filters the small dust, so the pre-filter has a shorter cleaning cycle than the HEPA filter.

As described above, the inspection time differs depending on the type of the filter. Therefore, it is inconvenient to clean or replace the filter at least once every two months. In replacing the filter, the cost of the consumer is increased, There is an inconvenience that the ventilator can not be used for a period of time during which the ventilator is operated.

Also, in the case of a product connecting a duct of a ventilator to a ceiling, most of the products are hanging on the ceiling, and therefore, the accessibility is poor, and cleaning and replacement work is not easy.

Prior art including a configuration for ventilator cleaning is disclosed in Patent Registration No. 10-0563524, Registration No. 10-0894362, Registration Utility Model No. 20-0358104.

In the total enthalpy heat exchanger disclosed in the above Patent No. 10-0563524, a filter is connected between a pair of rollers between an outside air introduction part and an indoor air introduction part, and when foreign substances accumulate in a part of the filter, the roller is rotated to use another section So that the filter can be used without replacing the filter for a long period of time.

However, in such a configuration, dust accumulates inside the product during prolonged use, so that contamination of the interior of the product becomes serious. Also, the indoor air and the outdoor air are mixed due to the filter connected through the roller, There is a problem.

The filter cleaning apparatus of the ventilation system disclosed in the above-mentioned Japanese Patent No. 10-0894362 is required to additionally include a guide rail, a rotating shaft, a brush, a screw shaft, first and second driving motors, And the dust accumulated inside the product by the operation of the filter cleaning device is inconveniently cleaned separately.

The self-cleaning device for the ventilation air supply duct disclosed in the above-mentioned Registration Utility Model No. 20-0358104 is provided with an intake device for removing dust accumulated in the air supply pipe. However, in this configuration, dust in the air supply pipe is removed However, the problem that the filter is clogged by dust has a disadvantage that it can not be solved.

It is an object of the present invention to provide a ventilator which can easily perform the cleaning of the filter without disassembling the ventilator and extend the service life and the maintenance period of the filter The purpose is to provide.

In order to achieve the above object, the ventilator (1) of the present invention includes a first exhaust chamber (10) through which indoor air flows, and a second exhaust chamber (10) through which indoor air passed through the first exhaust chamber A second air supply room (40) for supplying outdoor air via the first air supply room (30) to the room, and a second air supply room A total enthalpy heat exchanger 50 in which heat exchange is performed between indoor air flowing from the first exhaust chamber 10 to the second exhaust chamber 20 and outdoor air flowing from the first feed chamber 30 to the second feed chamber 40, A filter 60 for filtering foreign substances contained in the air introduced into the total enthalpy heat exchanger 50 is provided on one side of the total enthalpy heat exchanger 50 facing the first air feed chamber 30, ); A diaphragm 80 is disposed on one side of the first exhaust chamber 10, the second exhaust chamber 20, the first feed chamber 30, the second feed chamber 40, and the total enthalpy heat exchanger 50, A pass passage 90 is formed; The indoor air is introduced into the second air supply room 40 by the operation of the air blowing fan 22 provided in the second exhaust chamber 20 and the total heat exchanger 50 and the filter 60, And is exhausted to the outside through the first feed chamber 30, the bypass passage 90, and the second exhaust chamber 20 after the filter 60 is backwashed.

A second communication hole 20a is formed in the partition plate 80 so as to communicate with the bypass passage 90 in the second exhaust chamber 20. In the first feed chamber 30, A third communication hole 30a formed in the partition plate 80 so as to communicate with the passage 90 and a third damper 33 opening and closing the third communication hole 30a, And an outside air damper 32 for opening and closing the outdoor air inlet 31 formed at one side.

In the filter cleaning mode, the third damper 33 is operated to open the third communication hole 30a, and the outside air damper 32 can be operated to close the outdoor air inlet 31. [

In the filter cleaning mode, the operation of the air supply fan (42) is stopped and only the air blower (22) can be operated.

The second air supply chamber 40 is provided with a supply air blower 42. The filter cleaning mode is operated when the number of rotations of the air supply fan 42 is equal to or larger than a predetermined number of rotations .

The second air supply chamber 40 is provided with an air supply blower 42. When the air supply blower 42 is operated for a predetermined time, the filter cleaning mode can be automatically performed.

A motor 71 rotatable in both directions in a predetermined angle range is provided on one side surface of the filter 60 facing the first feed chamber 30 and one end of the motor 71 is coupled to the rotation axis of the motor 71 in both directions A filter cleaning unit 70 may be provided which includes a shaft 72 to be rotated and a brush 73 which is provided on the shaft 72 and removes foreign matters adhered to one side of the filter 60.

The filter cleaning unit 70 comprises a first filter cleaning unit 70-1 and a second filter cleaning unit 70-2 provided at both ends of a diagonal line of the filter 60, The first filter cleaning unit 70-1 and the second filter cleaning unit 70-2 can be operated alternately.

The air conditioner according to claim 1, further comprising sensing means for sensing the degree of contamination of the indoor air. In the filter cleaning mode, when the degree of contamination of the indoor air detected by the sensing means exceeds the set degree of contamination, The bypass mode in which the air flows to the second exhaust chamber 20 side via the bypass passage 90 without passing through the total enthalpy heat exchanger 50 is exhausted.

The first exhaust chamber 10 is provided with a first communication hole 10a formed in the partition plate 80 to communicate with the bypass passage 90 and a first damper And a second damper 14 for opening and closing one side of the total enthalpy heat exchanger 50 facing the first exhaust chamber 10.

In the bypass mode, the first damper 13 is operated to open the first communication hole 10a, and the second damper 14 is operated to close one side of the total enthalpy heat exchanger 50 .

The filter 60 may have a structure in which a HEPA filter 61 located on the side of the total enthalpy heat exchanger 50 and a prefilter 62 located on the first feed chamber 30 are laminated.

According to the ventilator of the present invention, in the filter cleaning mode, the indoor air flows into the second air supply chamber through the operation of the exhaust blower, passes through the total enthalpy heat exchanger and the filter, backwashes the filter, So that the filter can be automatically and easily cleaned without disassembling the ventilation device.

Also, since the filter can be backwashed while using existing facilities of the ventilator, it is possible to implement a ventilating apparatus capable of backwashing without increasing manufacturing cost and volume.

In addition, the filter cleaning mode is configured to be performed automatically when the number of revolutions of the air supply fan is equal to or larger than a predetermined number of revolutions or when the air supply fan is operated for a set time, So that the convenience of the ventilation apparatus can be improved.

In addition, in the filter cleaning mode, the filter cleaning unit is additionally operated to remove foreign matter attached to the surface of the filter with a brush to separate and remove the filter, thereby further improving the efficiency of the filter cleaning.

In addition, the filter cleaning unit is provided at both ends of the diagonal line on one side of the filter, and the two filter cleaning units are alternately operated to remove the foreign matter, thereby effectively removing foreign matter without blind spots over the entire area of the filter.

The indoor air is exhausted via the bypass passage without passing through the total enthalpy heat exchanger when the indoor air pollution is high, so that the pollutants contained in the indoor air are communicated to one side of the total enthalpy heat exchanger It is possible to prevent the filter from being contaminated and extend the service life and the maintenance period of the filter.

1 is a schematic plan view of a ventilator according to the invention,
2 is a side schematic view of a ventilator according to the present invention,
3 is a system diagram of a ventilator according to the present invention,
Fig. 4 is a front view of the filter cleaning unit viewed from the direction A in Fig. 1,
5 is a schematic plan view showing a heat exchange mode of a ventilator according to the present invention,
6 is a side schematic view showing a heat exchange mode of a ventilator according to the present invention,
7 is a schematic diagram showing a heat exchange mode of the ventilator according to the present invention,
FIG. 8 is a schematic plan view showing a filter cleaning mode of the ventilator according to the present invention,
FIG. 9 is a side schematic view showing a filter cleaning mode of the ventilator according to the present invention;
FIG. 10 is a systematic view showing a filter cleaning mode of the ventilator according to the present invention,
11 is a schematic plan view showing a bypass mode of a ventilator according to the present invention,
12 is a side schematic view showing a bypass mode of a ventilator according to the present invention,
13 is a schematic diagram showing a bypass mode of a ventilator according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a ventilator 1 according to the present invention includes a first exhaust chamber 10 through which indoor air flows, a second exhaust chamber 10 through which the indoor air flows, A second exhaust chamber 20 for exhausting the indoor air passed through the first compartment 30 to the outside, a first compartment 30 for introducing outdoor air into the room, a second compartment 30 for introducing outdoor air via the first compartment 30, The air conditioning system according to any one of claims 1 to 3, further comprising: a supply air chamber (40); indoor air flowing from the first exhaust chamber (10) to the second exhaust chamber (20) and outdoor air flowing from the first air supply chamber (30) A total enthalpy heat exchanger 50 for performing heat exchange and a filter disposed on one side of the total enthalpy heat exchanger 50 facing the first air feed chamber 30 to filter foreign substances contained in the air flowing into the total enthusiast exchanger 50 And a filter 60 for filtering. The filter 60 may further include a filter cleaning unit 70 for removing foreign matters accumulated on one side of the filter 60.

A partition plate 80 is provided at one side of the first exhaust chamber 10, the second exhaust chamber 20, the first feed chamber 30, the second feed chamber 40 and the total enthalpy heat exchanger 50 And a bypass passage 90 is formed. In this embodiment, the bypass passage 90 is provided below the ventilator 1, but the bypass passage 90 may be provided above the ventilator 1.

In addition, the ventilator (1) of the present invention is provided with a heat exchange mode in which heat exchange is performed between indoor air to be exhausted and outdoor air to be supplied, a filter cleaning mode to remove foreign substances accumulated in the filter (60) A mode setting unit (not shown) for selecting a bypass mode in which the indoor air to be exhausted is exhausted via the bypass passage 90 without passing through the total enthalpy heat exchanger 50, And a control unit (not shown) for controlling the operation of the ventilator 1 according to the set operation mode.

The first exhaust chamber 10 has an indoor air inlet 11 into which indoor air flows and an air vent damper 12 for opening and closing the indoor air inlet 11. The first exhaust chamber 10 is provided with a first communication hole 10a formed in the diaphragm 80 so as to communicate with the bypass passage 90 and a first damper 13 opening and closing the first communication hole 10a, And a second damper (14) formed on one side of the total enthalpy heat exchanger (50) facing the first exhaust chamber (10) and opening / closing a passage through which room air flows to the total enthalpy heat exchanger (50) side.

And an indoor air outlet 21 through which indoor air is discharged to the outdoor side is provided on the outdoor side of the second exhaust chamber 20. [ The second exhaust chamber 20 is provided with a second communication hole 20a formed in the partition plate 80 so as to communicate with the bypass passage 90 and an exhaust blower 22 for forcibly sucking indoor air toward the outdoor side .

An outside air damper 32 for opening and closing a flow passage for introducing outdoor air is provided inside the outdoor air inlet 31. The outside air damper 32 is provided at the outside of the first air supply chamber 30, . A third communication hole 30a formed in the diaphragm 80 so as to communicate with the bypass passage 90 and a third damper 33 for opening and closing the third communication hole 30a are formed in the first air supply chamber 30, .

An outdoor air outlet (41) through which the outdoor air is discharged to the indoor side is provided on the indoor side of the second air supply room (40). The second air supply chamber (40) is provided with a supply air blower (42) for forcibly sucking outdoor air to the indoor side.

The total enthalpy heat exchanger (50) has a structure in which a flow passage for flowing indoor air and a flow passage for flowing outdoor air are alternately formed and heat exchange is possible between the indoor air and the outdoor air.

A filter 60 for filtering foreign matter contained in the outdoor air or the recirculated indoor air is provided on one side of the total enthalpy heat exchanger 50 facing the first air supply room 30. The filter 60 may be a HEPA filter, a prefilter, a medium filter, a deodorization filter, or the like. In this embodiment, the filter 60 has a structure in which a HEPA filter 61 located on the side of the total enthalpy heat exchanger 50 and a prefilter 62 located on the first feed chamber 30 side are stacked .

The filter cleaning unit 70 (70-1, 70-2) is a structure for removing foreign substances adhered to one side of the filter 60 facing the first air supply chamber 30, 71a, 71a-2 of the motor 71 (71-1, 71-2) are coupled to each other to rotate in both directions 72-1 and 72-2 and a brush 73 for removing foreign matter attached to one side of the filter 60. The shaft 72 ).

In one embodiment, the filter cleaning unit 70 includes a first filter cleaning unit 70-1 and a second filter cleaning unit 70-2, which are provided at both ends of a diagonal line of one side of the filter 60, ), And the first filter cleaning unit 70-1 and the second filter cleaning unit 70-2 can be operated alternately. Therefore, as shown in Fig. 4, the area in the first path P1 that can be cleaned by the first filter cleaning unit 70-1 and the area in the first path P1 that can be cleaned by the second filter cleaning unit 70-2 The area in the second path P2 is partially overlapped and the foreign material can be removed without a dead zone over the entire area of one side of the filter 60. [

In this embodiment, while the first shaft 72-1 of the first filter cleaning unit 70-1 is in the position shown by the solid line, the second filter cleaning unit 70-2 is activated, While the second shaft 72-2 of the filter cleaning unit 70-2 is in the position shown by the solid line, the first filter cleaning unit 70-1 is activated. By configuring the first filter cleaning unit 70-1 and the second filter cleaning unit 70-2 to operate alternately in this way, the first and second filter cleaning units 70-1 and 70-2 can be moved alternately during the movement of the first shaft 72-1 and the second shaft 72-2 The mutual interference can be prevented and the whole area of one side of the filter 60 can be cleaned without missing portions.

Hereinafter, the operation of the heat exchange mode, the filter cleaning mode, and the bypass mode of the ventilator 1 according to the present invention will be described with reference to FIGS. 5 to 13. FIG.

<Heat exchange mode>

5 to 7, in the heat exchange mode, the ventilation damper 12, the outside air damper 32 and the second damper 14 are opened and the first damper 13 and the third damper 33 are opened, And both the exhaust blower 22 and the air supply blower 42 are operated.

The indoor air flows into the first exhaust chamber 10 through the indoor air inlet 11 and then flows into the indoor air outlet 21 via the total enthalpy heat exchanger 50 and the second exhaust chamber 20, To the outdoor side. The outdoor air is introduced into the first air supply room 30 through the outdoor air inlet 31 and then discharged to the room side through the outdoor heat exchanger 50 and the second air supply room 40 through the outdoor air outlet 41 . The indoor air and the outdoor air pass through the total enthalpy heat exchanger (50) to perform heat exchange.

<Filter cleaning mode>

8 to 10, in the filter cleaning mode, the third damper 33 is operated to open the third communication hole 30a, and the outside air damper 32 is operated to close the outdoor air inlet 31 And the exhaust blower 22 is activated, and the air supply fan 42 is shut off.

Accordingly, in the filter cleaning mode, the indoor air is introduced into the second air supply room 40 by the operation of the air blower 22 provided in the second exhaust chamber 20, 60 and back through the filter 60 and then discharged to the outside through the first feed chamber 30, the bypass passage 90, and the second exhaust chamber 20.

Here, the backwashing of the filter 60 may be performed when the foreign material such as dust is attached to one side of the filter 60 facing the first air supply chamber 30, So that foreign matter attached to one side of the filter 60 is blown out to separate and remove the foreign matter.

As described above, according to the present invention, it is possible to remove the foreign matter adhering to the filter 60 only by operating the exhaust blower 22, so that the filter 60 can be automatically cleaned easily without disassembling the ventilator 1 have.

In the present invention, the filter 60 can be backwashed without using additional components for the backwashing of the filter 60, while using the existing equipment of the ventilator 1 as it is, It is possible to implement a cleanable ventilator 1.

On the other hand, the filter cleaning mode can be configured to be activated when the number of rotations of the air supply fan 42 is equal to or larger than a predetermined number of rotations as compared with the initial number of rotations. That is, when foreign substances are accumulated in the filter 60 and the air gap of the filter medium provided in the filter 60 becomes clogged or narrowed, in order to satisfy the constant air supply capacity by the air supply fan 42, the rotation speed of the air supply fan 42 It is automatically increased. When the number of rotations of the air supply blower 42 increases to a predetermined number of revolutions or more as compared with the initial number of revolutions, the controller determines that the filter 60 needs to be cleaned, Respectively.

In another embodiment, the filter cleaning mode may be automatically performed when the air supply fan 42 is operated for a predetermined time. That is, when the ventilator 1 is operated in a mode other than the filter cleaning mode, for example, in the heat exchange mode or the bypass mode, and the air supply fan 42 is operated for the set time, foreign substances accumulate in the filter 60 , And the filter cleaning mode is automatically performed for a predetermined time after the air supply fan (42) is operated for the set time, so that the filter (60) is automatically cleaned at regular intervals.

In the case where the number of revolutions of the air supply blower 42 is equal to or more than a predetermined number of revolutions as compared with the initial number of revolutions or when the air supply fan 42 is operated for the set time, , The filter 60 can be automatically cleaned without manual operation of the user, so that the convenience of operation of the ventilator 1 is improved.

Further, in the filter cleaning mode, the filter 60 is backwashed by the operation of the exhaust blower 22, and the filter cleaning unit 70 is additionally operated so as to be attached to the surface of the filter 60 The cleaning efficiency of the filter 60 can be further improved by scraping off foreign matter with the brush 73. [

<Bypass mode>

11 to 13, in the bypass mode, the ventilation damper 12, the outside air damper 32 and the first damper 13 are opened and the second damper 14 and the third damper 33 are opened And both the exhaust blower 22 and the air supply blower 42 are operated.

Accordingly, in the bypass mode, the indoor air flows into the first exhaust chamber 10 through the indoor air inlet 11 and then flows downward through the first communication hole 10a, The room air passing through the bypass passage 90 is flowed upward through the second communication opening 20a and flows into the second exhaust chamber 20, And is discharged to the outdoor side through the discharge port (21). The outdoor air is introduced into the first air supply room 30 through the outdoor air inlet 31 and then discharged to the room side through the outdoor heat exchanger 50 and the second air supply room 40 through the outdoor air outlet 41 .

In such a bypass mode, the indoor air is exhausted via the bypass passage 90 without passing through the total enthalpy heat exchanger 50 at the time of exhaust when the indoor air is contaminated, The flow of the pollutants contained in the filter 60 to the side of the filter 60 connected to one side of the total enthalpy heat exchanger 50 is blocked to prevent the filter 60 from being contaminated, .

Examples of the case where the room air is contaminated include a case where dust is generated when the indoor space is cleaned or when the room is cooked and the pollution degree of the room air is increased, Or the like. If the pollution degree of the indoor air detected by the sensing means exceeds the set pollution degree, the control unit can control the automatic conversion to the bypass mode even when the filter cleaning mode is being performed.

As described above, according to the present invention, the cleaning of the filter 60 is automatically and simply performed by backwashing the filter 60 due to the operation of only the blower for exhaust 22 while maintaining the configuration of the existing ventilator 1 And the lifetime and maintenance period of the filter 60 can be extended by periodic automatic cleaning of the filter 60. [

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.

1: Ventilation device 10: First exhaust chamber
10a: first communicating port 11: indoor air inlet
12: ventilation damper 13: first damper
14: second damper 20: second exhaust chamber
20a: second communicating port 21: indoor air outlet
22: exhaust blower 30: first class room
30a: third communication port 31: outdoor air inlet
32: outside damper 33: third damper
40: second class room 41: outdoor air outlet
42: blower for air supply 50: total heat exchanger
60: Filter 61: Hepa filter
62: pre-filter 70: filter cleaning unit
70-1: First filter cleaning unit 70-2: Second filter cleaning unit
71: motor 72: shaft
73: Brush 80: Diaphragm
90: Bypass passage

Claims (12)

A first exhaust chamber 10 through which indoor air flows, a second exhaust chamber 20 through which indoor air passed through the first exhaust chamber 10 is discharged to the outside, a first exhaust chamber 30 through which outdoor air flows, A second air supply chamber 40 for supplying outdoor air via the first air supply chamber 30 to the room and a second air supply chamber 40 for supplying indoor air flowing into the second exhaust chamber 20 from the first exhaust chamber 10, And an outdoor heat exchanger (50) in which heat exchange is performed between outdoor air flowing from the first air supply room (30) to the second air supply room (40)
A filter 60 for filtering foreign substances contained in the air flowing into the total enthalpy heat exchanger 50 is provided on one side of the total enthalpy heat exchanger 50 facing the first air feed chamber 30;
A diaphragm 80 is disposed on one side of the first exhaust chamber 10, the second exhaust chamber 20, the first feed chamber 30, the second feed chamber 40, and the total enthalpy heat exchanger 50, A pass passage 90 is formed;
The indoor air is introduced into the second air supply room 40 by the operation of the air blowing fan 22 provided in the second exhaust chamber 20 and the total heat exchanger 50 and the filter 60, And is discharged to the outside of the room through the first air supply chamber (30), the bypass passage (90), and the second air discharge chamber (20) after backwashing the filter (60).
The method according to claim 1,
A second communication hole 20a is formed in the partition plate 80 so as to communicate with the bypass passage 90 in the second exhaust chamber 20,
A third communication hole 30a formed in the partition plate 80 so as to communicate with the bypass passage 90 and a third damper 30a opening and closing the third communication hole 30a are formed in the first feeding chamber 30, And an outdoor air damper (32) for opening / closing an outdoor air inlet (31) formed at one side of the first air supply room (30).
3. The method of claim 2,
In the filter cleaning mode,
The third damper 33 is operated to open the third communication hole 30a,
And the outside air damper (32) is operated to close the outdoor air inlet (31).
The method according to claim 1,
The second air supply chamber (40) is provided with a supply air blower (42)
Wherein in the filter cleaning mode, the air supply fan (42) is stopped and only the air blower (22) is activated.
The method according to claim 1,
The second air supply chamber (40) is provided with a supply air blower (42)
Wherein the filter cleaning mode is activated when the number of revolutions of the air supply fan (42) is equal to or higher than a predetermined number of revolutions in comparison with an initially set number of revolutions.
The method according to claim 1,
The second air supply chamber (40) is provided with a supply air blower (42)
Wherein the filter cleaning mode is automatically executed when the air supply fan (42) is operated for a predetermined time.
The method according to claim 1,
On one side of the filter (60) facing the first feed chamber (30)
A shaft 72 rotatable in both directions by being coupled to a rotation shaft of the motor 71 in both directions and a shaft 72 provided in the shaft 72 to rotate the filter 60, And a brush (73) for removing foreign substances adhered to one side of the filter cleaning unit (70).
8. The method of claim 7,
The filter cleaning unit 70 includes a first filter cleaning unit 70-1 and a second filter cleaning unit 70-2 provided at both ends of a diagonal line of the filter 60,
Wherein the first filter cleaning unit (70-1) and the second filter cleaning unit (70-2) are operated alternately.
The method according to claim 1,
Further comprising sensing means for sensing the degree of contamination of the room air,
In the filter cleaning mode, when the contamination degree of the indoor air detected by the sensing means exceeds the set pollution degree, the indoor air introduced into the first exhaust chamber (10) passes through the bypass passage (90) to the second exhaust chamber (20) side and exhausted.
10. The method of claim 9,
The first exhaust chamber 10 is provided with a first communication hole 10a formed in the partition plate 80 to communicate with the bypass passage 90 and a first damper And a second damper (14) for opening / closing one side of the total enthalpy heat exchanger (50) facing the first exhaust chamber (10).
11. The method of claim 10,
In the bypass mode,
The first damper 13 is operated to open the first communication hole 10a,
And the second damper (14) is operated to close one side of the total enthalpy heat exchanger (50).
The method according to claim 1,
The filter 60 has a structure in which a HEPA filter 61 positioned on the side of the total enthalpy heat exchanger 50 and a prefilter 62 located on the first feed chamber 30 are laminated Ventilation system.

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