WO2023158229A1

WO2023158229A1 - Air conditioner outdoor unit and ventilation method using same

Info

Publication number: WO2023158229A1
Application number: PCT/KR2023/002243
Authority: WO
Inventors: 조성진
Original assignee: 삼성전자주식회사
Priority date: 2022-02-21
Filing date: 2023-02-16
Publication date: 2023-08-24
Also published as: KR20230125686A

Abstract

An air conditioner outdoor unit according to one aspect of the present disclosure comprises: a cabinet including a heat exchanger, a compressor and a fan; an inner cabinet provided inside the cabinet; an inlet which is provided at the lower portion of the inner cabinet, and in through which air flows; an outlet which is provided at the upper portion of the inner cabinet, and through which the influent air is discharged; an air guide duct provided inside the inner cabinet; and a dust sensor which is provided at the air guide duct, and which detects the concentration of dust in the air passing through the inner cabinet.

Description

Outdoor unit of air conditioner and ventilation method using the same

The present disclosure relates to an air conditioner, and more particularly, to an outdoor unit of the air conditioner and a ventilation method using the same.

An air conditioner is a device that cools or heats air using a refrigeration cycle and discharges the cooled or heated air to adjust the temperature of the room.

In general, an air conditioner may include an outdoor unit configured to exchange heat with outside air and an indoor unit configured to exchange heat with indoor air.

An indoor unit of an air conditioner according to the prior art may include a dust sensor and a dust collector.

The dust sensor is formed to measure the concentration of dust in the room, and the dust collector is formed to purify the indoor air by filtering dust contained in the indoor air.

Therefore, the air conditioner can sense the concentration of dust in the room to determine the degree of contamination of the indoor air, and operate the dust collector accordingly. Specifically, when the concentration of dust in the room exceeds the reference concentration, the air conditioner may operate the dust collector to collect the dust contained in the indoor air to purify the indoor air.

However, since the air conditioner according to the prior art has a dust sensor installed in the indoor unit, it is possible to detect the high concentration of dust in the indoor air and purify the indoor air only after dust is introduced into the room and the dust concentration in the indoor air increases.

That is, the air conditioner according to the prior art has a problem in that it cannot prevent the increase in the dust concentration in the indoor air by preemptively operating the dust collector of the indoor unit when the dust concentration in the external air is high.

The present disclosure was invented in view of the above problems, and by providing a dust sensor capable of measuring the concentration of dust in the outside air to the outdoor unit, the outdoor unit of the air conditioner can prevent indoor air from being polluted in advance. related to

In addition, the present disclosure relates to a ventilation method using an air conditioner including an outdoor unit equipped with a dust sensor.

An outdoor unit of an air conditioner according to an aspect of the present disclosure includes a cabinet including a heat exchanger, a compressor, and a fan; an inner cabinet provided inside the cabinet; an inlet provided at a lower portion of the inner cabinet and through which air is introduced; an outlet provided on an upper portion of the inner cabinet and through which the introduced air is discharged; an air guide duct installed inside the inner cabinet; and a dust sensor installed in the air guide duct and detecting a dust concentration of the air passing through the inner cabinet.

At this time, the air movement direction inside the inner cabinet is from the lower surface of the inner cabinet to the upper surface, and in the air guide duct, a portion of the air passing through the inner cabinet is perpendicular to or inclined to the air movement direction. may be introduced into the air guiding duct, and the air passing through the dust sensor may be discharged from the air guiding duct parallel to the air movement direction.

Also, the air guide duct may be installed parallel to the lower surface of the inner cabinet.

In addition, the air guide duct may be installed inclined with respect to the lower surface of the inner cabinet.

In addition, the dust sensor may include an air passage including an inlet and an outlet; a sensing unit installed in the air passage and detecting a dust concentration of air flowing through the air passage; and a sensor fan to allow the air to flow through the air passage.

Also, the dust sensor may be installed inside the air guide duct.

In addition, the air guide duct may include an inlet connected to an inlet of the air flow path of the dust sensor; a discharge unit connected to the outlet of the air passage; and an internal partition wall partitioning the inlet and the outlet.

In addition, the discharge part may include a chimney protruding from the inlet part.

Also, the dust sensor may be installed on an outer surface of the air guide duct.

In addition, the air guide duct may include an inlet hole provided on one surface of the air guide duct to correspond to an inlet of the air flow path of the dust sensor; an outlet hole provided on one surface of the air guide duct to correspond to an outlet of the air flow path of the dust sensor and spaced apart from the inlet hole by a predetermined distance; and an inner partition wall blocking an inside of the air guide duct between the inlet hole and the outlet hole.

An outdoor unit of an air conditioner according to another aspect of the present disclosure includes a cabinet including a heat exchanger, a compressor, and a fan; an inner cabinet provided inside the cabinet; an inlet provided at a lower portion of the inner cabinet and through which air flowing inside the cabinet is introduced; an outlet provided on an upper portion of the inner cabinet and through which the introduced air is discharged; an air guide duct installed inside the inner cabinet and formed in an L shape; and a dust sensor installed inside the air guide duct and detecting a dust concentration of the air passing through the inner cabinet.

According to another aspect of the present disclosure, a ventilation method using an air conditioner including an outdoor unit equipped with a dust sensor includes transmitting indoor air quality information by an air monitor; transmitting, by the air conditioner, outdoor air information measured by the dust sensor and the temperature sensor of the outdoor unit; and determining, by a ventilator, indoor air quality using the indoor air quality information, and performing ventilation using the outdoor air quality information when the indoor air quality is poor.

At this time, in the step of performing ventilation using the outdoor air information, if the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is poor, the ventilator may bypass the total heat exchanger and perform ventilation through an air purifier. .

Further, in the step of performing ventilation using the outdoor air information, if the indoor/outdoor temperature difference is greater than the reference temperature and the outdoor air quality is poor, the ventilator may perform ventilation through a total heat exchanger and an air purifier.

Further, in the step of performing ventilation using the outdoor air information, if the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is good, the ventilator may perform ventilation by bypassing the total heat exchanger and the air purifier.

In addition, in the step of performing ventilation using the outdoor air information, if the indoor/outdoor temperature difference is greater than the reference temperature and the outdoor air quality is good, the ventilator may bypass the air purifier and perform ventilation through a total heat exchanger. .

1 is a diagram showing a refrigerant circuit of an air conditioner according to an embodiment of the present disclosure;

2 is a perspective view showing an outdoor unit of an air conditioner according to an embodiment of the present disclosure;

Figure 3 is a perspective view showing an internal cabinet installed in the outdoor unit of the air conditioner of Figure 2;

Fig. 4 is a front view of the inner cabinet of Fig. 3;

5 is a conceptual diagram showing a state in which an air guide duct according to an embodiment of the present disclosure is installed obliquely in an internal cabinet;

6 is a conceptual diagram showing a state in which an air guide duct according to an embodiment of the present disclosure is installed obliquely in an internal cabinet;

7 is a perspective view illustrating a dust sensing device according to an embodiment of the present disclosure;

8 is a front view of the dust sensing device of FIG. 7;

9 is a cross-sectional view of the dust sensing device of FIG. 7 taken along line Ⅰ-I;

10 is a perspective view showing a dust sensing device according to another embodiment of the present disclosure;

11 is a cross-sectional view of the dust sensing device of FIG. 10 taken along line II-II;

Fig. 12 is a perspective view showing the air guide duct of Fig. 10 turned upside down;

13 is a functional block diagram of an air conditioner according to an embodiment of the present disclosure;

14 is a diagram for explaining air flow in an outdoor unit of an air conditioner according to an embodiment of the present disclosure;

15 is a perspective view showing an outdoor unit of an air conditioner according to another embodiment of the present disclosure;

16 is a front view showing the outdoor unit of the air conditioner of FIG. 15;

17 is a view showing a ventilation system using an air conditioner having an outdoor unit according to an embodiment of the present disclosure;

18 is a table for explaining the operation of a ventilator according to conditions of indoor air and outdoor air;

19 is a diagram conceptually showing an operating state of a ventilator according to outdoor air quality and indoor/outdoor temperature difference;

20 is a view conceptually showing an operating state of a ventilator according to outdoor air quality and indoor/outdoor temperature difference;

21 is a view conceptually showing an operating state of a ventilator according to outdoor air quality and indoor/outdoor temperature difference;

22 is a diagram conceptually showing an operating state of a ventilator according to outdoor air quality and indoor/outdoor temperature difference;

23 is a flow chart illustrating a ventilation method using an air conditioner according to an embodiment of the present disclosure.

The following description with reference to the accompanying drawings is provided to provide a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and equivalents thereof. It contains various specific details for illustrative purposes, but these should be regarded as illustrative only. Accordingly, those skilled in the art will recognize that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not to be limited in their bibliographic meaning, but are used only by the inventors to enable a clear and consistent understanding of the present disclosure. Accordingly, the following description of various embodiments of the present disclosure is provided for purposes of illustration only and is not intended to limit the present disclosure as defined by the appended claims and equivalents thereof, as is common practice in the art. It is clear to those who have knowledge.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may only be used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present disclosure.

Terms used in the embodiments of the present disclosure may be interpreted as meanings commonly known to those skilled in the art unless otherwise defined.

In addition, terms such as 'front end', 'rear end', 'upper end', 'lower end', 'upper end', and 'lower end' used in the present disclosure are defined based on drawings, and by these terms, the shape and Location is not limited.

Hereinafter, an air conditioner according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a refrigerant circuit of an air conditioner according to an embodiment of the present disclosure.

Referring to FIG. 1 , the air conditioner may include an indoor unit 1 and an outdoor unit 2.

The indoor unit 1 may be located in a room where air conditioning is to be performed. For example, the indoor unit 1 may be installed inside a house or an office.

The outdoor unit 2 may be installed outdoors where air conditioning is not performed.

The air conditioner includes a refrigerant circuit that circulates a refrigerant between an indoor unit (1) and an outdoor unit (2). The refrigerant circulates between the indoor unit and the outdoor unit along the refrigerant circuit, and may absorb or release heat during a state change (eg, a state change from gas to liquid or from liquid to gas).

In order to induce a state change of the refrigerant, the refrigerant circuit may include a compressor 10, an outdoor heat exchanger 11, an expansion valve 3, and an indoor heat exchanger 4.

The compressor 10 compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature/high-pressure gaseous refrigerant discharged from the compressor (10) flows into the outdoor heat exchanger (11).

In the outdoor heat exchanger 11, the high-temperature/high-pressure gaseous refrigerant becomes a liquid refrigerant by the outside air, and heat is released. The liquid refrigerant discharged from the outdoor heat exchanger (11) flows into the expansion valve (3).

The outdoor unit 2 may include an outdoor fan 13 for sucking in outside air and allowing it to pass through the outdoor heat exchanger 11 . The outdoor fan 13 may be formed to rotate by the outdoor fan motor 14 .

In addition, the outdoor unit 2 may include a dust sensor 50 capable of detecting the concentration of dust included in outside air sucked in by the outdoor fan 13 .

In the following description, for convenience of description, the outdoor heat exchanger 60 is referred to as a heat exchanger, and the outdoor fan 13 and the outdoor fan motor 14 are referred to as a fan and a fan motor, respectively.

The expansion valve 3 lowers the pressure and temperature of the refrigerant in a liquid state to make it low-temperature and low-pressure liquid refrigerant. The low-temperature/low-pressure liquid refrigerant discharged from the expansion valve (3) flows into the indoor heat exchanger (4).

In the indoor heat exchanger (4), the low-temperature/low-pressure liquid refrigerant absorbs heat from the surrounding hot air and evaporates into a gaseous state. The gaseous refrigerant discharged from the indoor heat exchanger 4 flows into the compressor 10 and circulates through the refrigerant circuit again.

The indoor unit 1 may include an indoor fan 5 for sucking in indoor air and allowing it to pass through the indoor heat exchanger 4 . The indoor fan 5 may be formed to rotate by the indoor fan motor 6 .

In addition, the indoor unit 1 may include an indoor dust sensor 7 and a dust collector 8 . The indoor dust sensor 7 may be configured to measure the concentration of dust contained in indoor air. The dust collector 8 is formed to purify indoor air by filtering dust included in the air sucked in by the indoor fan 5 .

As described above, the refrigerant may release heat from the heat exchanger 11 and absorb heat from the indoor heat exchanger 4 . The indoor heat exchanger 4 may be installed in the indoor unit 1 together with the expansion valve 3, and the heat exchanger 11 may be installed in the outdoor unit 2 together with the compressor 10. Thus, the indoor heat exchanger 4 can cool indoor air.

2 is a perspective view illustrating an outdoor unit of an air conditioner according to an embodiment of the present disclosure. For reference, FIG. 2 shows a state in which the front cover of the cabinet 20 is removed so that the inside of the cabinet 20 can be seen.

Referring to FIG. 2 , the outdoor unit 2 of the air conditioner may include a cabinet 20, a heat exchanger 11, a compressor 10, a fan 13, and an internal cabinet 30.

The cabinet 20 forms the outer shape of the outdoor unit 2 and is formed in a substantially hollow rectangular parallelepiped shape. Inside the cabinet 20, a heat exchanger 11, a compressor 10, a fan 13, and an internal cabinet 30 may be provided.

Air inlets 21 through which external air is introduced may be provided on the rear surface 20a, the left side 20b, and the right side 20c of the cabinet 20 . The air inlet 21 may be formed of a plurality of openings.

A front opening 22 in which a front cover is installed may be provided at the front of the cabinet 20 . The front cover can be detachably installed in the front opening 22 of the cabinet 20 . The front cover may include a plurality of openings through which air is introduced.

An air outlet 23 through which air introduced into the cabinet 20 is discharged may be provided on the upper surface 20d of the cabinet 20 .

The heat exchanger 11 may be installed inside the cabinet 20 so as to be adjacent to the left side 20b, the rear side 20a, and the right side 20c of the cabinet 20 . Accordingly, air introduced through the air inlet 21 may pass through the heat exchanger 11 and move toward the center of the cabinet 20 .

The heat exchanger 11 may be formed so that the refrigerant flowing inside the heat exchanger 11 exchanges heat with external air passing through the heat exchanger 11 .

The compressor 10 is installed inside the cabinet 20. For example, the compressor 10 may be installed on the lower surface of the cabinet 20 . The compressor 10 may be connected to the heat exchanger 11 .

The compressor 10 is configured to compress the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature/high-pressure gaseous refrigerant discharged from the compressor 10 flows into the heat exchanger 11 .

The fan 13 is installed on top of the cabinet 20 . The fan 13 may be installed adjacent to the air outlet 23 provided on the upper surface 20d of the cabinet 20 . The fan 13 is configured to rotate by a fan motor 14 .

When the fan 13 rotates, an air flow is generated. That is, when the fan 13 rotates, outside air is introduced into the air inlets 21 provided on the front, rear 20a, left side 20b, and right side 20c of the cabinet 20, and the fan 13 After passing through ), it is discharged to the outside of the cabinet 20 through the air outlet 23 provided on the upper surface 20d of the cabinet 20 .

Since the fan 13 is installed on the top of the cabinet 20, when the fan 13 rotates, an air flow moving upward is generated inside the cabinet 20.

The inner cabinet 30 is provided inside the cabinet 20 . The inner cabinet 30 may be installed above the cabinet 20 . The inner cabinet 30 may be formed separately from the cabinet 20 . The compressor 10 is not installed inside the inner cabinet 30 .

3 is a perspective view illustrating an internal cabinet of an outdoor unit of the air conditioner of FIG. 2; Figure 4 is a front view of the inner cabinet of Figure 3; For reference, FIGS. 3 and 4 show a state in which the inner cover 31 of the inner cabinet 30 is separated.

Referring to FIG. 3 , the internal cabinet 30 may be formed in a substantially hollow rectangular parallelepiped shape.

An electric component for supplying power to the compressor 10 and the fan motor 14 and a printed circuit board for controlling the compressor 10 and the fan motor 13 may be accommodated inside the inner cabinet 30 . The inner cabinet 30 is formed to protect electric components and printed circuit boards from rain and snow.

The front of the inner cabinet 30 is open. An inner cover 31 may be installed in the front opening 32 of the inner cabinet 30 . The inner cover 31 may be detachably installed on the front of the inner cabinet 30 .

The internal cabinet 30 may be formed so that air introduced into the cabinet 20 by the fan 13 flows from the bottom to the top. To this end, an inlet 33 through which air is introduced may be provided at the bottom of the inner cabinet 30 , and an outlet 34 through which air is discharged may be provided at the top of the cabinet 20 .

For example, as shown in FIG. 3 , an inlet 33 may be provided on the lower surface 30a of the inner cabinet 30 and an outlet 34 may be provided on the upper surface 30b.

When the fan 13 operates, air in the cabinet 20 may flow into the internal cabinet 30 through the inlet 33 . Air introduced into the inner cabinet 30 may be discharged to the outside of the inner cabinet 30 through the outlet 34 .

That is, when the fan 13 operates, outside air flows into the cabinet 20 through the air inlet 21 of the cabinet 20 and then flows out of the cabinet 20 through the air outlet 23. It is discharged. At this time, some of the air introduced into the cabinet 20 may pass through the internal cabinet 30 .

Specifically, when the fan 13 operates, air flows into the inside of the inner cabinet 30 through the inlet 33 of the inner cabinet 30, and the introduced air flows into the inner cabinet 30 through the outlet 34. ) is discharged to the outside of the Accordingly, the direction of the air flow flowing inside the inner cabinet 30, that is, the air movement direction of the inner cabinet 30 is directed from the lower surface 30a of the inner cabinet 30 to the upper surface 30b.

Electric components and printed circuit boards installed in the inner cabinet 30 may be cooled by air passing through the inner cabinet 30 .

In addition, since a part of the outside air introduced into the cabinet 20 passes through the internal cabinet 30 and moves to the fan 13, the air flow inside the internal cabinet 30 flows into the cabinet 20 and moves to the internal cabinet 30. The flow rate is slower and more stable than the air flow inside the cabinet 20 formed by the outside air moving directly to the fan 13 without passing through the 30. That is, the air flow of the inner cabinet 30 is slower and more stable than that of the cabinet 20 .

The air guide duct 40 may be installed inside the inner cabinet 30 . The air guide duct 40 may be formed to guide air to the dust sensor 50 . In addition, the air guide duct 40 may be formed to discharge air discharged from the dust sensor 50 to the internal cabinet 30 .

The air guide duct 40 may be fixed to one side of the inner cabinet 30 . In the case of the embodiment shown in FIG. 3 , the air guide duct 40 is fixed to the left side of the inner cabinet 30 . However, the installation position of the air guide duct 40 is not limited thereto. The air guide duct 40 may be installed anywhere where it does not interfere with electric components and printed circuit boards installed in the internal cabinet 30 .

The air guide duct 40 may include an inlet 41 through which air is introduced and an outlet 42 through which air is discharged.

The air guide duct 40 may be formed such that a portion of the air passing through the inner cabinet 30 is introduced into the air guide duct 40 in a direction perpendicular to or inclined to the air movement direction in the inner cabinet 30. . Also, the air guiding duct 40 may be formed so that air passing through the dust sensor 50 can be discharged from the air guiding duct 40 parallel to the air movement direction of the internal cabinet 30 .

In other words, the inlet 41 of the air guide duct 40 may be formed perpendicular to the air movement direction of the inner cabinet 30 . Then, the air of the inner cabinet 30 may flow into the air guide duct 40 in a direction perpendicular to the air movement direction of the inner cabinet 30 . As a result, the flow rate of the air inside the air guide duct 40 is slower than that of the inner cabinet 30 and can be stable.

The outlet 42 of the air guide duct 40 may be formed parallel to the air movement direction of the inner cabinet 30 . Since the outlet 42 of the air guide duct 40 is formed parallel to the air movement direction of the inner cabinet 30, the air of the air guide duct 40 flows smoothly through the outlet 42 to the inner cabinet 30. can be emitted as

As another example, the inlet 41 of the air guiding duct 40 is inclined at an angle with respect to the air movement direction of the inner cabinet 30, and the outlet 42 of the air guiding duct 40 is of the inner cabinet 30. It may be formed parallel to the direction of air movement.

Then, the air of the inner cabinet 30 may flow into the air guide duct 40 in a direction inclined with respect to the air movement direction of the inner cabinet 30 . As a result, the flow rate of the air inside the air guide duct 40 is slower than that of the inner cabinet 30 and can be stable. In addition, the air of the air guide duct 40 can be smoothly discharged to the inner cabinet 30 through the outlet 42 .

The air guide duct 40 may be formed in the shape of a square pipe having a rectangular cross section. At this time, the inlet 41 may be formed at one end of the air guide duct 40, and the outlet 42 may be formed to contact the other end of the upper surface of the air guide duct 40. The other end of the air guide duct 40 is blocked.

Referring to FIG. 3 , the outlet 42 of the air guide duct 40 may be formed as a chimney 46 . That is, the outlet 42 of the air guide duct 40 may be formed as a chimney 46 of a square pipe shape protruding from the upper surface of the air guide duct 40 . When the outlet 42 is formed as the chimney 46 in this way, the air discharged from the air guide duct 40 can smoothly move to the upper part of the inner cabinet 30 .

The air guide duct 40 may be installed parallel to the lower surface 30a of the inner cabinet 30 . That is, the lower surface of the air guide duct 40 may be installed parallel to the lower surface 30a of the inner cabinet 30 as shown in FIGS. 3 and 4 .

With this installation, the inlet 41 of the air guide duct 40 is perpendicular to the air flow direction (arrow A) of the inner cabinet 30. Accordingly, air may be introduced into the inlet 41 of the air guide duct 40 in a direction perpendicular to the air flow direction A of the inner cabinet 30 (arrow B).

Also, the outlet 42 of the air guide duct 40 is in a direction parallel to the air flow direction A of the inner cabinet 30. Accordingly, air can be discharged from the outlet 42 of the air guide duct 40 in a direction parallel to the air flow direction A of the inner cabinet 30 (arrow C).

As another example, as shown in FIGS. 5 and 6 , the air guiding duct 40 may be installed slightly inclined rather than parallel to the lower surface 30a of the inner cabinet 30 .

5 is a conceptual diagram illustrating a state in which an air guiding duct according to an embodiment of the present disclosure is inclinedly installed in an internal cabinet.

Referring to FIG. 5 , the lower surface of the air guide duct 40 may be installed in the inner cabinet 30 at an angle inclined downward with respect to the lower surface 30a of the inner cabinet 30 . That is, the lower surface of the air guide duct 40 installed in the inner cabinet 30 may form a certain angle θ with a virtual plane VP parallel to the lower surface 30a of the inner cabinet 30 .

When installed in this way, the inlet 41 of the air guide duct 40 is inclined at a certain angle with respect to the air flow direction A of the inner cabinet 30. Accordingly, air may be introduced into the inlet 41 of the air guide duct 40 in a direction inclined at an angle with respect to the air flow direction A of the inner cabinet 30 (arrow B').

In addition, the outlet 42 of the air guide duct 40 is also inclined at a certain angle with respect to the air flow direction A of the inner cabinet 30. Accordingly, air can be discharged from the outlet 42 of the air guide duct 40 in a direction inclined at an angle with respect to the air flow direction A of the inner cabinet 30 (arrow C').

At this time, the installation slope of the air guide duct 40 is limited so that the air of the inner cabinet 30 is stably introduced into the inlet 41 of the air guide duct 40 and smoothly discharged through the outlet 42. do. For example, the air guide duct 40 may be installed in the inner cabinet 30 such that the angle θ with the virtual plane VP is 30 degrees or less.

6 is a conceptual diagram illustrating a state in which an air guiding duct according to an embodiment of the present disclosure is inclinedly installed in an internal cabinet.

Referring to FIG. 6 , the lower surface of the air guide duct 40 may be installed in the inner cabinet 30 at an angle inclined upward with respect to the lower surface 30a of the inner cabinet 30 . That is, the lower surface of the air guide duct 40 installed in the inner cabinet 30 may form a certain angle θ with a virtual plane VP parallel to the lower surface 30a of the inner cabinet 30 .

The dust sensor 50 may be installed in the air guide duct 40. For example, the dust sensor 50 may be installed inside the air guide duct 40 . Thus, the dust sensor 50 can be fixed to the inner cabinet 30 by means of the air guiding duct 40 . That is, the air guide duct 40 may serve to fix the dust sensor 50 to the inner cabinet 30 .

The dust sensor 50 may be installed inside the air guide duct 40 . The dust sensor 50 and the air guide duct 40 may form a dust sensing device.

Hereinafter, a dust sensing device in which the dust sensor 50 is installed inside the air guide duct 40 will be described in detail with reference to FIGS. 7 to 9 .

7 is a perspective view illustrating a dust sensing device according to an embodiment of the present disclosure. 8 is a front view of the dust sensing device of FIG. 7 . 9 is a cross-sectional view of the dust sensing device of FIG. 7 taken along line Ⅰ-I.

Referring to FIGS. 7 to 9 , the dust sensing device may include an air guide duct 40 and a dust sensor 50 .

The outlet 42 of the air guide duct 40 may be formed as a chimney 46 . That is, the outlet 42 of the air guide duct 40 may be formed as a chimney 46 of a square pipe shape protruding from the upper surface of the air guide duct 40 . That is, the air guide duct 40 may be formed in an approximately L shape.

As described above, if the outlet 42 of the air guide duct 40 is formed as a chimney 46, the air discharged from the air guide duct 40 can smoothly move to the upper part of the internal cabinet 30.

Inside the air guide duct 40, an internal partition wall 43 partitioning an inlet 52 and an outlet 53 of the air passage 51 provided in the dust sensor 50 is installed. Specifically, the inner partition wall 43 is a space of the air guide duct 40 where the inlet 52 of the air passage 51 of the dust sensor 50 is located and an air guide where the outlet 53 of the air passage 51 is located. It is formed to block the space of the duct 40. Therefore, the space of the air guide duct 40 where the inlet 52 of the air passage 51 of the dust sensor 50 is located and the space of the air guide duct 40 where the outlet 53 of the air passage 51 is located are do not communicate with each other

In other words, the air guide duct 40 may be divided into an inlet portion 44 and an outlet portion 45 by the internal partition wall 43 . That is, the air guide duct 40 includes an inlet 44 connected to the inlet 52 of the air passage 51 of the dust sensor 50 and an outlet 53 of the air passage 51 of the dust sensor 50. It may include a discharge part 45 connected to, and an internal partition wall 43 partitioning the inlet part 44 and the discharge part 45.

In addition, the outlet 45 may include a chimney 46 protruding from the inlet 44 . That is, the outlet 45 may include a chimney 46 protruding above the upper surface of the air guide duct 40 forming the inlet 44 . The chimney 46 may be formed in the same rectangular cross section as the air guide duct 40 .

The dust sensor 50 is formed to measure the concentration of dust in the outside air. The dust sensor 50 may be configured to output the measured dust concentration as an electrical signal. The dust sensor 50 may be formed in various ways as long as it can detect the concentration of dust.

The dust sensor 50 may include an air passage 51 through which air passes, and a sensor fan 55 generating a suction force to allow air to pass through the air passage 51 . A sensing unit 56 may be installed in the air passage 51 to measure the concentration of dust included in the air passing through the air passage 51 .

The air passage 51 may be formed inside the dust sensor 50 . An inlet 52 and an outlet 53 of the air passage 51 may be formed on an outer surface of the dust sensor 50 . An inlet 52 and an outlet 53 of the air passage 51 may be formed on one surface of the dust sensor 50 . As another example, the inlet 52 and the outlet 53 of the air passage 51 may be formed on different surfaces of the dust sensor 50 . In the case of the embodiment shown in FIG. 7 , the inlet and outlet of the air passage 51 are formed on the upper surface of the dust sensor 50 .

The sensor fan 55 may be installed in the air passage 51 inside the dust sensor 50 . The sensor fan 55 is formed to generate a suction force. Accordingly, when the sensor fan 55 rotates, air may flow into the inlet 52 of the air passage 51 and be discharged through the sensor fan 55 to the outlet 53 of the air passage 51 .

The sensing unit 56 may be installed inside the dust sensor 50 . The sensing unit 56 may be formed in various ways as long as it can measure the concentration of dust contained in the air.

For example, the sensing unit 56 may include a light emitting unit emitting light and a light receiving unit receiving light emitted from the light emitting unit. The light emitting unit may be formed of an infrared LED or laser. The light receiving unit may be formed of a diode capable of receiving infrared rays or a diode capable of receiving laser light.

The light emitting part is installed on one side of the air passage 51, and the light receiving part is installed on the other side of the air passage 51 facing the light emitting part. Accordingly, the sensing unit 56 may measure the concentration of dust included in the air passing through the air passage 51 using the light emitting unit and the light receiving unit.

Air in the inner cabinet 30 may be introduced into the inlet 44 through the inlet of the air guide duct 40 .

When the sensor fan 55 of the dust sensor 50 rotates, air from the inlet 44 is introduced into the air passage 51 through the inlet 52 of the air passage 51 provided in the dust sensor 50. . The air introduced into the air passage 51 is discharged to the outlet 45 through the outlet 53 of the air passage 51 .

The air of the discharge unit 45 may be discharged to the outside of the air guide duct 40 through the outlet 42 of the discharge unit 45, that is, the chimney 46.

Since the inlet 44 and the outlet 45 are blocked by the internal partition wall 43, the air in the inlet 44 does not directly move to the outlet 45, and the air flow path of the dust sensor 50 ( 51) to the discharge unit 45.

As described above, when the dust sensor 50 is installed inside the air guide duct 40 installed in the inner cabinet 30, the air around the dust sensor 50 is blown into the fan 13 installed in the cabinet 20. influence can be minimized. That is, the flow rate of the air flow around the dust sensor 50 becomes slow and stable. Accordingly, the accuracy of the dust concentration measured by the dust sensor 50 can be increased. When the flow of air around the dust sensor 50 is unstable or the flow rate of the air flow is high, the accuracy of the dust concentration measured by the dust sensor 50 may be lowered.

In another embodiment, the dust sensor 50 may be installed on the outer surface of the air guide duct 40 . Hereinafter, a dust sensing device in which the dust sensor 50 is installed on the outer surface of the air guide duct 40 will be described in detail with reference to FIGS. 10 to 12 .

10 is a perspective view illustrating a dust sensing device according to another embodiment of the present disclosure. 11 is a cross-sectional view of the dust sensing device of FIG. 10 taken along line II-II. Fig. 12 is a bottom perspective view of the air guide duct of Fig. 10;

Referring to FIGS. 10 and 11 , the dust sensing device may include an air guide duct 40 and a dust sensor 50 .

The air guide duct 40 includes an inlet hole 47 provided on one surface of the air guide duct 40 to correspond to the inlet 52 of the air passage 51 provided in the dust sensor 50 and the air passage 51. A discharge hole 48 provided on one side of the air guide duct 40 may be included to correspond to the outlet 53 . The discharge hole 48 may be spaced apart from the inlet hole 47 by a predetermined distance.

Referring to FIG. 12 , two holes, that is, an inlet hole 47 and an exhaust hole 48 may be provided on the lower surface of the air guide duct 40 . A dust sensor 50 may be installed on the lower surface of the air guide duct 40 . When the dust sensor 50 is installed on the lower surface of the air guiding duct 40, the inlet 52 and outlet 53 of the air passage 51 of the dust sensor 50 are inlet holes of the air guiding duct 40, respectively. (47) and discharge hole (48).

An internal partition wall 43 blocking the inside of the air guide duct 40 between the inlet hole 47 and the discharge hole 48 may be provided inside the air guide duct 40 . Specifically, the inner partition wall 43 is the inner space of the air guide duct 40 where the inlet 52 of the air passage 51 provided in the dust sensor 50 is located and the outlet 53 of the air passage 51 is located. It is provided inside the air guide duct 40 to block the internal space of the air guide duct 40.

Therefore, the inner space of the air guide duct 40 where the inlet 52 of the air passage 51 is located and the inner space of the air guide duct 40 where the outlet 53 of the air passage 51 is located do not communicate with each other. .

In other words, the air guide duct 40 may be partitioned into an inlet 44 and an outlet 45 by the inner partition wall 43 . That is, the air guide duct 40 includes an inlet 44 connected to the inlet 52 of the air passage 51 of the dust sensor 50 and an outlet connected to the outlet 53 of the air passage 51 ( 45), and an internal partition wall 43 partitioning the inlet 44 and the outlet 45.

The air passage 51 may be formed inside the dust sensor 50 . An inlet 52 and an outlet 53 of the air passage 51 may be formed on an outer surface of the dust sensor 50 . An inlet 52 and an outlet 53 of the air passage 51 may be formed on one surface of the dust sensor 50 . As another example, the inlet 52 and the outlet 53 of the air passage 51 may be formed on different surfaces of the dust sensor 50 . In the case of the embodiment shown in FIG. 10 , the inlet 52 and the outlet 53 of the air flow path 51 are formed on the upper surface of the dust sensor 50 .

The sensor fan 56 may be installed in the air passage 51 inside the dust sensor 50 . The sensor fan 55 is formed to generate a suction force. Accordingly, when the sensor fan 55 rotates, air may flow into the inlet 52 of the air passage 51 and be discharged through the sensor fan 55 to the outlet 53 of the air passage 51 .

The sensing unit 56 may be installed inside the dust sensor 50 . The sensing unit 56 may be formed in various ways as long as it can measure the concentration of dust contained in the air. Since the sensing unit 56 has been described above, a detailed description thereof will be omitted.

Air in the inner cabinet 30 may be introduced into the inlet 44 through the inlet 41 of the air guide duct 40 .

When the sensor fan 55 of the dust sensor 50 rotates, the air in the inlet 44 flows through the inlet hole 47 of the air guide duct 40 and the inlet of the air passage 51 provided in the dust sensor 50. It flows into the air passage 51 through (52). When the introduced air passes through the sensing unit 56 provided in the air passage 51, the sensing unit 56 measures the concentration of dust in the air.

The air passing through the sensing unit 56 is discharged to the discharge unit 45 through the outlet 53 of the air passage 51 and the discharge hole 48 of the air guide duct 40 . The air of the discharge unit 45 may be discharged to the outside of the air guide duct 40 through the outlet 42 of the discharge unit 45, that is, the chimney 46.

Since the inlet 44 provided with the inlet hole 47 and the outlet 45 provided with the outlet hole 48 are blocked by the internal partition wall 43, the air from the inlet 44 is directly discharged to the outlet 45. It does not move to the dust sensor 50, but moves to the discharge unit 45 through the air passage 51 of the dust sensor 50.

As described above, the dust sensor 50 is installed on the outer surface of the air guide duct 40 installed in the inner cabinet 30, and the inlet 52 and outlet 53 of the air flow path 51 of the dust sensor 50 is connected to the inlet hole 47 and the outlet hole 48 of the air guide duct 40, the air around the dust sensor 50 is minimized from being affected by the fan 13 installed in the cabinet 20 can do. That is, the flow rate of the air flow around the dust sensor 50 becomes slow and stable. Accordingly, the accuracy of the dust concentration measured by the dust sensor 50 can be increased.

13 is a functional block diagram of an air conditioner according to an embodiment of the present disclosure.

Referring to FIG. 13, the air conditioner includes a user input unit 92, a display 93, an indoor temperature sensor 94, a humidity sensor 95, an indoor dust sensor 7, an indoor fan motor 6, and a fan motor ( 14), a compressor 10, a dust sensor 50, a temperature sensor 60, a communication unit 96, and a processor 90.

The user input unit 92 may receive a user input related to the operation of the air conditioner from a user and output an electrical signal corresponding to the received user input to the processor 90 .

The user input unit 92 may include a plurality of buttons provided on the indoor unit 1 . For example, the user input unit 92 may include a button for setting a target indoor temperature, a button for selecting one of a cooling mode, a dehumidifying mode, and a cleaning mode.

The plurality of buttons may include a push switch and a membrane switch operated by a user's pressing, or a touch switch operated by a user's body part contact.

The user input unit 92 may include a receiver that receives a radio signal from a remote controller. The remote control may include a plurality of buttons that perform the same functions as the plurality of buttons provided on the user input unit 92 .

The display 93 may receive information about the operation of the air conditioner and information about the indoor environment from the processor 90 and display the received information. For example, the display 93 may display a target indoor temperature, a measured indoor temperature, a driving mode, wind strength, and the like. Also, the display 93 may display the indoor dust concentration and the outdoor dust concentration.

The display 93 may be provided in the indoor unit 1 . The display 93 may include a liquid crystal display (LCD) panel, a light emitting diode (LED) panel, or the like.

The indoor temperature sensor 94 may measure the indoor temperature and transmit the measured temperature information to the processor 90 as an electrical signal. For example, the room temperature sensor 94 may include a thermistor whose electrical resistance changes according to temperature. The indoor temperature sensor 94 may be provided in the indoor unit 1 .

The humidity sensor 95 may measure indoor humidity and transmit the measured humidity information to the processor 90 as an electrical signal. The humidity sensor 95 may be provided in the indoor unit 1 .

The indoor dust sensor 7 may measure the indoor dust concentration and transmit the measured indoor dust concentration information to the processor 90 as an electrical signal. The indoor dust sensor 7 may be provided in the indoor unit 1 .

The indoor fan motor 6 may rotate the indoor fan 5 under the control of the processor 90 . The indoor fan motor 6 may adjust the rotational speed of the indoor fan 5 under the control of the processor 90 . When the indoor fan 5 rotates, heat can be exchanged between the indoor heat exchanger 4 provided in the indoor unit 1 and the indoor air.

The fan motor 14 may rotate the fan 13 under the control of the processor 90 . The fan motor 14 may adjust the rotational speed of the fan 13 under the control of the processor 90 . A fan (13) and a fan motor (14) are installed in the outdoor unit (2). When the fan 13 rotates, the heat exchanger 11 provided in the outdoor unit 2 and the outside air can exchange heat.

The fan 13 rotated by the fan motor 14 may generate an air flow (air flow) passing through the heat exchanger 11 .

Specifically, when the fan 13 rotates in one direction, external air is sucked into the cabinet 20 through the air inlet 21 provided in the cabinet 20, and the sucked air passes through the heat exchanger 11. Heat can be exchanged with the heat exchanger 11 during operation. The heat-exchanged air may be discharged to the upper side of the cabinet 20 through the fan 13 and the air outlet 23 .

The compressor 10 operates under the control of the processor 90 and causes the refrigerant to circulate along the refrigerant circuit. Specifically, the compressor 10 may compress the gaseous refrigerant and discharge the high-temperature/high-pressure gaseous refrigerant. The refrigerant discharged by the compressor 10 circulates through the heat exchanger 11, the expansion valve 3, and the indoor heat exchanger 4, and discharges heat from the heat exchanger 11 and returns to the indoor heat exchanger 4. can absorb heat.

The dust sensor 50 is formed to measure the dust concentration of outside air flowing into the cabinet 20 . Since the dust sensor 50 has been described above, a detailed description thereof will be omitted.

The temperature sensor 60 may measure outdoor temperature and transmit the measured temperature information to the processor 90 as an electrical signal. For example, the temperature sensor 60 may include a thermistor whose electrical resistance changes according to temperature. The temperature sensor 60 may be provided in the outdoor unit 2 .

Since the compressor 10, the fan motor 14, the dust sensor 50, and the temperature sensor 60 are installed in the outdoor unit 2, they are physically separated from the processor 90 provided in the indoor unit 1. Accordingly, the compressor 10 , the fan motor 14 , the dust sensor 50 , and the temperature sensor 60 may be configured to communicate with the processor 90 .

The processor 90 may include a control circuit, and includes a user input unit 92, a display 93, an indoor temperature sensor 94, a humidity sensor 95, an indoor dust sensor 7, and an indoor fan motor 6. , The fan motor 14, the compressor 10, the dust sensor 50, and the temperature sensor 60 are electrically connected. The processor 90 receives information from the user input unit 92, the display 93, the room temperature sensor 94, the humidity sensor 95, the room dust sensor 7, the dust sensor 50, and the temperature sensor 60. The indoor fan motor 51 , the fan motor 14 , and the compressor 10 can be controlled based on the input signal.

The processor 90 may include a memory 91 that stores and/or stores programs and/or data for generating control signals.

The processor 90 includes user input information received through the user input unit 92, indoor temperature information detected by the temperature sensor 94, and humidity sensor based on programs and data stored and/or stored in the memory 91. The indoor humidity information detected by (95), the indoor dust concentration information detected by the indoor dust sensor 50, and the outside air dust concentration information detected by the dust sensor 50 can be processed.

In addition, the processor 90 outputs control signals for controlling the indoor fan motor 6, the fan motor 14, and the compressor 10 based on programs and data stored and/or stored in the memory 91. can do.

The processor 90 may include an arithmetic circuit, a memory circuit, and a control circuit. The processor 90 may include at least one chip. Also, the processor 90 may include at least one core.

The memory 91 may store and/or store programs and/or data for processing user input information, indoor temperature information, indoor humidity information, indoor dust information, outdoor dust information, and outdoor temperature information. Also, the memory 91 may store and/or store programs and/or data for controlling the indoor fan motor 6 , the fan motor 14 , and the compressor 10 .

The memory 91 includes volatile memories such as Static Random Access Memory (S-RAM) and Dynamic Random Access Memory (D-RAM), Read Only Memory (ROM), and Erasable Programmable Memory (EPROM). read only memory (EPROM), flash memory, and the like.

The communication unit 96 may be connected to an external device to transmit/receive data with the external device. Specifically, the communication unit 96 may transmit information about the operation of the air conditioner to an external device or receive a control command from the external device. For example, the communication unit 96 may be formed to transmit the dust concentration of indoor air and the dust concentration of outdoor air to a smart phone.

The communication unit 96 may communicate with an external device through various communication methods. For example, the communication unit 96 uses Bluetooth, infrared data association (IrDA), Zigbee, Wi-Fi, Wi-Fi direct, and Ultra Wideband (UWB). , near field communication (NFC), and the like.

Hereinafter, air flow in the outdoor unit 2 when the air conditioner according to an embodiment of the present disclosure having the above structure is operating will be described with reference to FIG. 14 .

14 is a diagram for explaining air flow in an outdoor unit of an air conditioner according to an embodiment of the present disclosure.

When the air conditioner is turned on, the processor 90 operates the fan motor 14 of the outdoor unit 2. Then, the fan 13 provided on the top of the cabinet 20 rotates.

When the fan 13 rotates, as shown in FIG. 14 , outside air is introduced into the cabinet 20 through the air inlet 21 of the cabinet 20 (F1).

Most of the outside air (F2) introduced into the cabinet 20 moves upward and is discharged to the outside of the cabinet 20 through the fan 13 and the air outlet 23 (F7).

A portion of the outside air (F3) introduced into the cabinet 20 is introduced into the inside of the internal cabinet 30 through an inlet 33 provided at a lower portion of the internal cabinet 30.

Most of the air introduced into the inner cabinet 30 moves upward and is discharged to the outside of the inner cabinet 30 through the outlet 34 of the inner cabinet 30 (F6).

Part of the air (F4) introduced into the inner cabinet (30) is introduced into the inlet (41) of the air guide duct (40). The air introduced into the air guiding duct 40 passes through the air passage 51 of the dust sensor 50 and then is discharged through the outlet 42 of the air guiding duct 40 (F5).

The air exhausted from the air guide duct 40 moves upward and is discharged to the outside of the inner cabinet 30 through the outlet 34 of the inner cabinet 30 (F6).

The air discharged from the outlet 34 of the inner cabinet 30 passes through the fan 13 and the air outlet 23 together with most of the outside air F2 and is discharged to the outside of the cabinet 20 .

As described above, in the outdoor unit 2 of the air conditioner according to an embodiment of the present disclosure, the inner cabinet 30 is installed inside the cabinet 20, and the air guide duct 40 is installed inside the inner cabinet 30. ) is provided, and a dust sensor 50 is installed inside the air guide duct 40. Accordingly, the air around the dust sensor 50 is hardly affected by the air flow formed by the fan 13 of the outdoor unit 2. Accordingly, the dust sensor 50 installed in the air guide duct 40 can accurately measure the dust concentration of the outside air flowing into the cabinet 20 .

In the above, the case where the inner cabinet 30 is formed separately from the cabinet 20 and the compressor 10 is not installed inside the inner cabinet 30 has been described, but the structure of the inner cabinet 30 is limited to this. it is not going to be

The inner cabinet 30 is a part of the cabinet 20, and the compressor 10 may be installed therein. Hereinafter, with reference to FIGS. 15 and 16, an outdoor unit 2 according to another embodiment having an internal cabinet 30 having a different structure will be described in detail.

15 is a perspective view illustrating an outdoor unit of an air conditioner according to another embodiment of the present disclosure. 16 is a front view showing the outdoor unit of the air conditioner of FIG. 15; For reference, FIGS. 15 and 16 show a state in which the front cover of the cabinet 20 is removed so that the inside of the cabinet 20 can be seen.

15 and 16 , the outdoor unit 2 of the air conditioner may include a cabinet 20, a heat exchanger 11, a compressor 10, a fan 13, and an internal cabinet 30.

The cabinet 20 forms the outer shape of the outdoor unit 2 and is formed in a substantially hollow rectangular parallelepiped shape. Inside the cabinet 20, a heat exchanger 11, a fan 13, and an internal cabinet 30 may be provided.

Air inlets through which external air is introduced may be provided on the rear surface 20a and the left surface 20b of the cabinet 20 . The air inlet may be formed of a plurality of openings.

A front opening 22 in which a front cover is installed may be provided at the front of the cabinet 20 . The front cover can be detachably installed in the front opening 22 of the cabinet 20 . The front cover may be provided with an air outlet through which air introduced into the cabinet 20 is discharged. The air outlet may be formed of a plurality of openings.

The heat exchanger 11 may be installed inside the cabinet 20 so as to be adjacent to the left side 20b and the rear side 20a of the cabinet 20 . Accordingly, the air introduced into the air inlet can pass through the heat exchanger 11 and move to the air outlet of the cabinet 20 .

The fan 13 is installed on the left side of the inside of the cabinet 20 . The fan 13 may include two fans 13 arranged vertically. The fan 13 is configured to rotate by a fan motor.

When the fan 13 rotates, an air flow flowing from the rear to the front of the cabinet 20 is generated. That is, when the fan 13 rotates, outside air is introduced into the air inlets provided on the rear side 20a and the left side 20b of the cabinet 20, passes through the fan 13, and then flows through the cabinet 20. Air is discharged to the outside of the cabinet 20 through an air outlet provided on the front side.

Since the fan 13 is installed between the front and rear surfaces 20a of the cabinet 20, when the fan 13 rotates, an air flow moving from the rear to the front occurs inside the cabinet 20.

The inner cabinet 30 is provided inside the cabinet 20 . The inner cabinet 30 may be provided on the right side of the cabinet 20 . The inner cabinet 30 may be formed by dividing an inner space of the cabinet 20 with a partition wall 70 . That is, the fan 13 and the heat exchanger 11 are installed in the space of the cabinet 20 on the left side of the partition wall 70, and the space of the cabinet 20 on the right side of the partition wall 70 accommodates the internal cabinet 30. form

The compressor 10 is installed inside the inner cabinet 30. For example, the compressor 10 may be installed on the lower surface of the inner cabinet 30 . The compressor 10 may be connected to the heat exchanger 11 .

An electric component for supplying power to the compressor 10 and the fan motor and a printed circuit board for controlling the compressor 10 and the fan motor may be accommodated inside the internal cabinet 30 . Electrical components and printed circuit boards may be disposed above the compressor 10 . The inner cabinet 30 is formed to protect electric components and printed circuit boards from rain and snow.

The front of the inner cabinet 30 is open. The front opening of the inner cabinet 30 may be covered by the front cover of the cabinet 20 . That is, when the front cover is installed on the front of the cabinet 20, the front of the internal cabinet 30 is also covered by the front cover.

The internal cabinet 30 may be formed so that air introduced into the cabinet 20 by the fan 13 flows from the bottom to the top. To this end, an inlet 71 through which air is introduced may be provided at a lower portion of the inner cabinet 30 , and an outlet 72 through which air is discharged may be provided at an upper portion of the inner cabinet 30 .

For example, as shown in FIGS. 14 and 15 , an inlet 71 may be provided at a lower portion of the partition wall 70 and an outlet port 72 may be provided at an upper portion of the partition wall 70 .

When the fan 13 operates, as shown in FIG. 15 , air in the cabinet 20 may flow into the internal cabinet 30 through the inlet 71 of the partition wall 70 . Air introduced into the inner cabinet 30 may be discharged to the outside of the inner cabinet 30 , that is, to the cabinet 20 through the outlet 72 of the partition wall 70 .

That is, when the fan 13 operates, outside air is introduced into the cabinet 20 through the air inlet of the cabinet 20 and then discharged to the outside of the cabinet 20 through the air outlet. At this time, some of the air introduced into the cabinet 20 may pass through the internal cabinet 30 .

Specifically, when the fan 13 operates, a part of the outside air introduced into the cabinet 20 flows into the inside of the cabinet 30 through the inlet 71 of the partition wall 70 (arrow F1), The released air is discharged to the outside of the inner cabinet 30 through the outlet 72 of the partition wall 70 (arrow F2). Accordingly, the direction of the air flow flowing inside the inner cabinet 30, that is, the air movement direction of the inner cabinet 30 is directed from the lower surface of the inner cabinet 30 to the upper surface.

In addition, since some of the outside air introduced into the cabinet 20 passes through the inner cabinet 30 and moves to the fan 13, the air flow inside the inner cabinet 30 does not pass through the inner cabinet 30. The flow velocity is slower and stable than the air flow inside the cabinet 20 formed by the outside air moving directly to the fan 13. That is, the air flow in the inner cabinet 30 is slower and more stable than the air flow in the cabinet 20 .

The air guide duct 40 may be fixed to one side of the inner cabinet 30 . In the case of the embodiment shown in FIG. 14 , the air guide duct 40 is fixed to the bulkhead 70 . However, the installation position of the air guide duct 40 is not limited thereto. The air guide duct 40 may be installed anywhere where it does not interfere with electric components and printed circuit boards installed in the internal cabinet 30 .

Then, the air of the inner cabinet 30 may flow into the air guide duct 40 in a direction inclined with respect to the air movement direction of the inner cabinet 30 . As a result, the flow rate of the air inside the air guide duct 40 is slower than that of the inner cabinet 30 and can be stable. In addition, the air of the air guide duct 40 can be smoothly discharged to the inner cabinet 30 through the outlet.

Since the air guiding duct 40 and the dust sensor 50 are the same as the air guiding duct 40 and the dust sensor 50 of the outdoor unit 2 according to the above-described embodiment, a detailed description thereof will be omitted.

According to the air conditioner according to an embodiment of the present disclosure having the above structure, the dust sensor 50 is installed on the inside or outside of the air guide duct 40 installed in the inner cabinet 30 provided inside the cabinet 20 is installed and the inlet 52 and the outlet 53 of the air passage 51 of the dust sensor 50 communicate with the air guide duct 40, the air around the dust sensor 50 enters the cabinet 20. The influence of the installed fan 13 can be minimized. That is, the flow rate of the air flow around the dust sensor 50 becomes slow and stable. Therefore, the air conditioner according to an embodiment of the present disclosure can increase the accuracy of the dust concentration measured by the dust sensor 50 installed in the outdoor unit 2 .

If the dust sensor 50 is provided in the outdoor unit 2 like the air conditioner according to an embodiment of the present disclosure, the dust concentration of the outside air of the place where the air conditioner is installed can be measured. Then, the air conditioner can prevent indoor air from being polluted by preemptively operating the dust collector 8 of the indoor unit 1 before the indoor air is polluted by the outside air, that is, before the dust concentration in the indoor air rises. can

In addition, by transmitting the dust concentration of the outside air measured by the dust sensor 50 of the outdoor unit 2 to the remote control or smart phone, the user can open and close the window for ventilation according to the dust concentration.

In addition, the user can prepare a mask or the like when going out by checking the dust concentration of outdoor air transmitted to a mobile device such as a smartphone.

In addition, dust may accumulate in the heat exchanger 11 of the outdoor unit 2 when the air conditioner is not operated for a long time in a state in which the concentration of dust in the outside air is bad. In this case, the processor 90 may remove dust accumulated in the heat exchanger 11 of the outdoor unit 2 by rotating the fan 13 of the outdoor unit 2 in a reverse direction.

As described above, a ventilation system may be formed using an air conditioner in which the dust sensor 50 is provided in the outdoor unit 2 .

17 is a diagram illustrating a ventilation system using an air conditioner having an outdoor unit according to an embodiment of the present disclosure.

Referring to FIG. 17 , a ventilation system 100 according to an embodiment of the present disclosure may include an air conditioner 101, an air monitor 110, a ventilation device 120, and a wireless repeater 130.

The air conditioner 101 includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 is installed indoors, and the outdoor unit 2 is installed outdoors.

The indoor unit 1 may include an indoor dust sensor 7 capable of detecting the concentration of dust in indoor air and an indoor temperature sensor 94 capable of measuring the indoor temperature. A processor 90 capable of controlling the indoor unit 1 and the outdoor unit 2 may be provided in the indoor unit 1 .

The outdoor unit 2 may include a dust sensor 50 capable of detecting the concentration of dust in outdoor air and a temperature sensor 60 capable of measuring outdoor temperature. Even when the air conditioner 101 is not operated in a standby mode, the dust sensor 50 of the outdoor unit 2 can sense the outdoor dust concentration. That is, the dust sensor 50 of the outdoor unit 2 can sense the outdoor dust concentration for 24 hours.

Since the structure of the air conditioner 101 is the same as the above-described air conditioner, a detailed description thereof will be omitted.

The processor 90 receives the dust concentration and outdoor temperature of the outdoor air from the dust sensor 50 and the temperature sensor 60 of the outdoor unit 2, and uses them to obtain outdoor air information including the outdoor dust concentration and outdoor temperature. can create

In addition, the processor 90 receives the concentration of dust in the indoor air and the indoor temperature from the indoor dust sensor 7 and the indoor temperature sensor 94 of the indoor unit 1, and uses them to receive the indoor dust concentration and the indoor temperature. Indoor air information can be generated.

The processor 90 may continuously detect the indoor dust concentration using the indoor dust sensor 7 to generate an accumulated value. Also, the processor 90 may continuously detect the outdoor dust concentration using the dust sensor 50 to generate an accumulated value. The processor 90 may select an average dust concentration difference based on the cumulative value.

The processor 90 may wirelessly transmit outdoor air information and indoor air information to the wireless repeater 130 through the communication unit 96 .

The air monitor 110 is configured to monitor indoor air quality. For example, the air monitor 110 may be configured to measure the amount of carbon dioxide (CO ₂ ) and the amount of volatile organic compounds (VOCs) in the room in real time. Volatile organic compounds may include benzene, toluene, xylene, styrene, ethylbenzene, and the like.

In addition, the air monitor 110 may be formed to measure the concentration of dust and the amount of radon in the room.

To this end, the air monitor 110 may include a carbon dioxide sensor 111, a VOC sensor 112, a radon sensor 113, and a dust sensor 114. In addition, the air monitor 110 may include a temperature sensor and a humidity sensor to measure indoor temperature and humidity. As another example, when the air conditioner 101 includes the indoor particle sensor 7, the air monitor 110 may not include the particle sensor 114.

The air monitor 110 may include a monitor display 115 capable of displaying states of carbon dioxide, VOC, radon, fine dust, and the like. The air monitor 110 may display the state of carbon dioxide, VOC, radon, and fine dust in four stages of good, normal, bad, and very bad.

The air monitor 110 may wirelessly transmit indoor air quality information including states of carbon dioxide, VOC, and radon to the wireless repeater 130 . To this end, the air monitor 110 may include a monitor communication unit 116 . For example, the monitor communication unit 116 may transmit indoor air quality information to the wireless repeater 130 via Wi-Fi.

The ventilator 120 is formed to discharge indoor air to the outdoors and introduce outdoor air into the room. To this end, the ventilation device 120 may include a ventilation fan, an exhaust duct, and an inlet duct.

In addition, the ventilator 120 may include an energy recovery ventilator (ERV) 121 and an air cleaner 122 .

The total heat exchanger 121 transfers the heat contained in the discharged indoor air to the incoming outdoor air to minimize energy loss during ventilation. Therefore, when the difference between indoor temperature and outdoor temperature is large, outdoor air may pass through the total heat exchanger 121 and be introduced into the room.

The total heat exchanger 121 may be configured to operate when the indoor/outdoor temperature difference is greater than or equal to a reference temperature. For example, when the indoor/outdoor temperature difference is 10° C. or more, outdoor air and indoor air may pass through the total heat exchanger 121 .

In addition, the total heat exchanger 121 may include a bypass function. In this case, when heat exchange between indoor air and outdoor air is not required because the indoor/outdoor temperature difference is less than the reference temperature, outdoor air does not pass through the total heat exchanger 121, that is, bypasses the total heat exchanger 121 and flows into the room. It can be.

The air purifier 122 is formed to remove dust contained in outdoor air. Accordingly, when the dust state of the outdoor air is bad, the outdoor air may pass through the air purifier 122 and be introduced into the room. Outdoor air that has passed through the air purifier 122 is in a good state as dust is removed.

In addition, the air purifier 122 may include a bypass function. In this case, when the dust state of the outdoor air is good, the outdoor air does not pass through the air purifier 122, that is, the air purifier 122 may be bypassed and introduced into the room.

In addition, the ventilation device 120 includes a ventilation display 123 displaying the operating state of the ventilation device 122, a ventilation communication unit 124 capable of transmitting and receiving information wirelessly with the wireless repeater 130, and the ventilation device 120 ) It may include a ventilation processor 125 for controlling.

The ventilator 120 may receive indoor air quality information and outdoor air information through the ventilation communication unit 124 .

The ventilation processor 125 may determine indoor air quality from indoor air quality information received through the wireless repeater 130 . The ventilation processor 125 may determine indoor air quality based on the worst state among the states of carbon dioxide, VOC, and radon included in the indoor air quality information.

For example, if the state of at least one of carbon dioxide, VOC, and radon included in the indoor air quality information is bad, the ventilation processor 125 determines the indoor air quality to be bad, and if the at least one state is very bad, the indoor air quality information is very bad. Air quality is rated as very poor.

When the indoor air quality is good or normal, the ventilation processor 125 does not operate the ventilator 120 because ventilation is not required in the room.

However, when the indoor air quality is poor or very poor, the ventilation processor 125 operates the ventilator 120 to ventilate the indoor air to the outside and introduce the outdoor air into the room.

The ventilation processor 125 may determine outdoor air quality from outdoor air information received through the wireless repeater 130 . The ventilation processor 125 determines outdoor air quality based on the dust concentration of outdoor air included in the outdoor air information.

For example, if the dust concentration of the outdoor air is poor, the ventilation processor 125 determines that the outdoor air quality is poor.

The ventilation processor 125 may perform ventilation by controlling the total heat exchanger 121 and the air purifier 122 in various ways according to outdoor air quality and a difference between indoor and outdoor temperatures. This will be described in detail with reference to FIGS. 18 to 22 below.

The wireless repeater 130 is formed to relay air quality information between the air conditioner 101 , the air monitor 110 , and the ventilation device 120 . The wireless repeater 130 may be formed to exchange information wirelessly with the air conditioner 101, the air monitor 110, and the ventilator 120 through Wi-Fi communication.

The wireless repeater 130 may be wirelessly connected to a mobile device 140 such as a smart phone. The wireless repeater 130 may be connected to the smart phone 140 through a mobile communication network. For example, the wireless repeater 130 may be connected to the smartphone 140 through 5G communication. In addition, the wireless repeater 130 may be connected to the smartphone 140 through Wi-Fi.

An air management application capable of displaying air quality and controlling the air conditioner 101 , the air monitor 110 , and the ventilator 120 may be installed in the smart phone 140 .

The user may check indoor air quality and outdoor air quality through an air management application installed in the smart phone 140 . In addition, the user may control the air conditioner 101, the air monitor 110, and the ventilator 120 through the air management application of the smart phone 140.

Hereinafter, the operation of the ventilator 120 according to outdoor air quality and indoor/outdoor temperature difference will be described in detail with reference to FIGS. 18 to 22 .

18 is a table for explaining the operation of a ventilator according to conditions of indoor air and outdoor air.

When indoor air quality is poor or very poor, the ventilation processor 125 activates the ventilation system 120 .

Referring to FIG. 18 , when the outdoor air quality is poor and the difference between the indoor and outdoor temperatures, that is, the indoor/outdoor temperature difference is less than 10° C., the ventilation processor 125 operates the ventilator 120 so that the outdoor air OA heats up. The exchanger 121 bypasses and passes through the air purifier 122 to be introduced into the room.

In other words, since the indoor/outdoor temperature difference is smaller than the reference temperature, the ventilator 120 allows the outdoor air (OA) to flow into the room without passing through the total heat exchanger 121, and the indoor air also passes through the total heat exchanger 121. and let it be discharged outdoors.

19 is a diagram conceptually illustrating an operation of a ventilator when the outdoor air quality is poor and the indoor/outdoor temperature difference is less than a reference temperature.

Referring to FIG. 19 , indoor air (RA) is sucked in through the inlet 201 in the room and discharged to the outdoors through the ventilation device 120 . Outdoor air (OA) is sucked in through the ventilation device 120, passes through the air purifier 122, and then flows into the room 200 through the exhaust port 202 of the room 200. At this time, outdoor air (OA) in a bad state passes through the air purifier 122 , removes fine dust, becomes a good state, and flows into the room 200 .

Referring again to FIG. 18 , when the outdoor air quality is poor and the indoor/outdoor temperature difference is 10° C. or more, the ventilation processor 125 operates the ventilation device 120 so that the outdoor air OA is supplied to the total heat exchanger 121 and the air purifier. 122 to be introduced into the room 200, and indoor air RA passes through the total heat exchanger 121 to be discharged to the outdoors.

In other words, since the indoor/outdoor temperature difference is larger than the reference temperature, the ventilator 120 allows the outdoor air OA to pass through the total heat exchanger 121 and flow into the room 200, and the indoor air RA also passes through the total heat exchanger It passes through (121) and is discharged to the outdoors. Then, since the heat of the indoor air (RA) is transferred to the outdoor air (OA), energy loss due to ventilation can be reduced.

20 is a diagram conceptually illustrating an operation of a ventilator when the outdoor air quality is poor and the indoor/outdoor temperature difference is greater than or equal to a reference temperature.

Referring to FIG. 20 , indoor air (RA) is sucked in through the inlet 201 of the room 200 and discharged to the outdoors through the total heat exchanger 121 of the ventilation device 120 . Outdoor air (OA) is sucked into the ventilation device 120, passes through the total heat exchanger 121 and the air purifier 122, and then flows into the room 200 through the exhaust port 202 of the room 200.

At this time, outdoor air (OA) in a bad state passes through the air purifier 122 , removes fine dust, becomes a good state, and flows into the room 200 . In addition, since both the indoor air (RA) and the outdoor air (OA) pass through the total heat exchanger 121, the heat of the indoor air (RA) is transferred to the incoming outdoor air (OA), thereby reducing energy loss due to ventilation. .

Referring again to FIG. 18 , when the outdoor air quality is good and the indoor/outdoor temperature difference is less than 10° C., the ventilation processor 125 operates the ventilator 120 so that the outdoor air OA is supplied to the total heat exchanger 121 and the air purifier. 122 is bypassed so that it is introduced into the room.

In other words, since the indoor/outdoor temperature difference is less than the reference temperature, the ventilator 120 allows the outdoor air OA to flow into the room 200 without passing through the total heat exchanger 121, and the indoor air RA also transfers heat. It is discharged to the outdoors without passing through the exchanger 121. In addition, since the outdoor air quality is good, the outdoor air (OA) is directly introduced into the room 200 without passing through the air purifier 122 .

21 is a diagram conceptually illustrating an operation of a ventilator when the outdoor air quality is good and the indoor/outdoor temperature difference is less than the reference temperature.

Referring to FIG. 21 , indoor air (RA) is sucked in through the inlet 201 of the room 200 and discharged to the outdoors through the ventilation device 120 . Outdoor air (OA) is sucked in through the ventilator 120 and introduced into the room through the exhaust vent 202 of the room 200 . At this time, since outdoor air quality is good, the outdoor air (OA) may directly flow into the room 200 without passing through the air purifier 122 .

Referring again to FIG. 18 , when the outdoor air quality is good and the indoor/outdoor temperature difference is 10° C. or more, the ventilation processor 125 operates the ventilation device 120 so that the outdoor air OA passes through the total heat exchanger 121 and It is introduced into the room 200, and the indoor air RA passes through the total heat exchanger 121 and is discharged to the outdoors.

In other words, since the indoor/outdoor temperature difference is larger than the reference temperature, the ventilation processor 125 allows the outdoor air OA to pass through the total heat exchanger 121 and enter the room 200, and the indoor air RA also passes through the total heat exchanger 121. It passes through (121) and is discharged to the outdoors. Then, since the heat of the indoor air (RA) is transferred to the outdoor air (OA), energy loss due to ventilation can be reduced. In addition, since outdoor air quality is good, the ventilation processor 125 allows the outdoor air OA to directly flow into the room 200 without passing through the air purifier 122 .

22 is a diagram conceptually illustrating an operation of a ventilator when the outdoor air quality is good and the indoor/outdoor temperature difference is greater than or equal to a reference temperature.

Referring to FIG. 22 , indoor air (RA) is sucked into the inlet 201 of the room 200 and discharged to the outdoors through the total heat exchanger 121 of the ventilation device 120 . Outdoor air (OA) is sucked into the ventilation device 120, passes through the total heat exchanger 121, and then flows into the room 200 through the exhaust port 202 of the room 200.

At this time, since the outdoor air OA is in a good state, the outdoor air OA does not pass through the air purifier 122 and directly flows into the room 200 . In addition, since both the indoor air (RA) and the outdoor air (OA) pass through the total heat exchanger 121, the heat of the indoor air (RA) is transferred to the incoming outdoor air (OA), thereby reducing energy loss due to ventilation. .

In another embodiment, the ventilator 120 may not include the air purifier 122 . In this case, when both outdoor air quality and indoor air quality are poor, the ventilator 120 may not perform ventilation.

At this time, the processor 90 of the air conditioner 101 may operate the indoor unit in the clean mode to purify the indoor air RA using the dust collector 8 . That is, the processor 90 of the air conditioner 101 cleans the air conditioner 101 to remove dust contained in the indoor air when the ventilator 120 does not perform ventilation in a state where the indoor air quality is poor. action can be made.

Hereinafter, a ventilation method using an air conditioner according to an embodiment of the present disclosure will be described with reference to FIG. 23 .

23 is a flowchart illustrating a ventilation method using an air conditioner according to an embodiment of the present disclosure.

The air monitor 110 transmits indoor air quality information (S10). Specifically, the air monitor 110 measures the amount of carbon dioxide and the amount of VOC contained in the indoor air (RA) using the carbon dioxide sensor 111 and the VOC sensor 112, and generates indoor air quality information including them do. The air monitor 110 transmits indoor air quality information to the wireless repeater 130 through the monitor communication unit 116 .

The air conditioner 101 transmits outdoor air information measured by the dust sensor 50 and the temperature sensor 60 of the outdoor unit 2 (S20). Specifically, the air conditioner 101 measures the outdoor dust concentration using the dust sensor 50 provided in the outdoor unit 2 and measures the outdoor temperature using the temperature sensor 60 . The air conditioner 101 generates outdoor air information including dust concentration and outdoor temperature of the measured outdoor air (OA). The air conditioner 101 transmits outdoor air information to the wireless repeater 130 through the communication unit 96 .

The ventilator 120 determines indoor air quality using the indoor air quality information received from the air monitor 110, and if the indoor air quality is poor, performs ventilation using the outdoor air information (S30).

Specifically, the ventilator 120 may determine indoor air quality using indoor air quality information received through the wireless repeater 130 .

If the indoor air quality is good or normal, the ventilator 120 does not perform ventilation.

When indoor air quality is poor or very poor, the ventilator 120 performs ventilation. At this time, the ventilator 120 may perform various ventilation operations using outdoor air information received through the wireless repeater 130 .

For example, when the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is poor, the ventilator 120 allows the outdoor air (OA) to bypass the total heat exchanger 121 and pass through the air purifier 122 to perform ventilation. can be done At this time, the ventilator 120 bypasses the total heat exchanger 121 and allows the indoor air RA to be discharged to the outdoors.

In addition, when the indoor/outdoor temperature difference is greater than the reference temperature and the outdoor air quality is poor, the ventilator 120 allows the outdoor air (OA) to pass through the total heat exchanger 121 and the air purifier 122 to perform ventilation. At this time, the ventilator 120 allows the indoor air RA to pass through the total heat exchanger 121 and then discharged to the outdoors.

In addition, when the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is good, the ventilator 120 allows the outdoor air (OA) to bypass the total heat exchanger 121 and the air purifier 122 to perform ventilation. . At this time, the ventilator 120 bypasses the total heat exchanger 121 and allows the indoor air RA to be discharged to the outdoors.

In addition, when the indoor/outdoor temperature difference is greater than the reference temperature and the outdoor air quality is good, the ventilator 120 allows the outdoor air (OA) to bypass the air purifier 122 and pass through the total heat exchanger 121 to perform ventilation. can At this time, the ventilator 120 allows the indoor air RA to pass through the total heat exchanger 121 and then discharged to the outdoors.

The ventilation system and ventilation method including the air conditioner according to an embodiment of the present disclosure as described above may automatically perform indoor ventilation using the dust concentration of outdoor air measured using the dust sensor provided in the outdoor unit.

Although the present disclosure has been shown and described with reference to various embodiments above, it is to be understood that various changes may be made in form and detail without departing from the spirit and scope of the present disclosure as defined by the appended claims and equivalents thereof. It will be understood by those skilled in the art.

Claims

a cabinet containing a heat exchanger, a compressor, and a fan;

an inner cabinet provided inside the cabinet;

an inlet provided at a lower portion of the inner cabinet and through which air is introduced;

an outlet provided on an upper portion of the inner cabinet and through which the introduced air is discharged;

an air guide duct installed inside the inner cabinet; and

and a dust sensor installed in the air guide duct and detecting a dust concentration of the air passing through the inner cabinet.
According to claim 1,

The air movement direction inside the inner cabinet is from the lower surface of the inner cabinet to the upper surface,

The air guide duct allows a portion of the air passing through the inner cabinet to flow into the air guide duct in a direction perpendicular to or inclined to the air movement direction, and the air passing through the dust sensor corresponds to the air movement direction. An outdoor unit of an air conditioner provided to discharge from the air guide duct in parallel.
According to claim 1,

The air guide duct is installed parallel to the lower surface of the inner cabinet, the outdoor unit of the air conditioner.
According to claim 1,

The air guide duct is installed inclined with respect to the lower surface of the inner cabinet, the outdoor unit of the air conditioner.
According to claim 1,

The dust sensor,

an air flow path including an inlet and an outlet;

a sensing unit installed in the air passage and detecting a dust concentration of air flowing through the air passage; and

An outdoor unit of an air conditioner comprising: a sensor fan to allow the air to flow through the air passage.
According to claim 5,

The outdoor unit of the air conditioner, wherein the dust sensor is installed inside the air guide duct.
According to claim 6,

The air guide duct,

an inlet connected to an inlet of the air flow path of the dust sensor;

a discharge unit connected to the outlet of the air passage; and

An outdoor unit of an air conditioner comprising: an inner partition wall partitioning the inlet and the outlet.
According to claim 7,

The outdoor unit of the air conditioner, wherein the outlet part includes a chimney protruding from the inlet part.
According to claim 5,

The outdoor unit of the air conditioner, wherein the dust sensor is installed on an outer surface of the air guide duct.
According to claim 9,

The air guide duct,

an inlet hole provided on one surface of the air guide duct to correspond to an inlet of the air flow path of the dust sensor;

an outlet hole provided on one surface of the air guide duct to correspond to an outlet of the air flow path of the dust sensor and spaced apart from the inlet hole by a predetermined distance; and

An outdoor unit of an air conditioner comprising: an internal partition wall blocking an inside of the air guide duct between the inlet hole and the discharge hole.
indoor unit; and

An air conditioner comprising an outdoor unit connected to the indoor unit and set forth in any one of claims 1 to 10.
In the ventilation method using an air conditioner including an outdoor unit equipped with a dust sensor,

The air monitor transmits indoor air quality information;

transmitting, by the air conditioner, outdoor air information measured by the dust sensor and the temperature sensor of the outdoor unit; and

A ventilation method using an air conditioner comprising: determining indoor air quality by a ventilator using the indoor air quality information and performing ventilation using the outdoor air quality information when the indoor air quality is poor.
According to claim 12,

In the step of performing ventilation using the outdoor air information,

If the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is poor, the ventilation device bypasses the total heat exchanger and performs ventilation through an air purifier.
According to claim 12,

In the step of performing ventilation using the outdoor air information,

Ventilation method using an air conditioner, wherein the ventilation device performs ventilation through a total heat exchanger and an air purifier when the indoor/outdoor temperature difference is greater than the reference temperature and the outdoor air quality is poor.
According to claim 12,

In the step of performing ventilation using the outdoor air information,

If the indoor/outdoor temperature difference is less than the reference temperature and the outdoor air quality is good, the ventilation device performs ventilation by bypassing the total heat exchanger and the air purifier.